Patent Grant
9372016
If an Application Data Sheet (ADS) has been filed on the filing date of this application, it is incorporated by reference herein. Any applications claimed on the ADS for priority under 35 U.S.C. §§119, 120, 121, or 365(c), and any and all parent, grandparent, great-grandparent, etc. applications of such applications, are also incorporated by reference, including any priority claims made in those applications and any material incorporated by reference, to the extent such subject matter is not inconsistent herewith.
The present application claims the benefit of the earliest available effective filing date(s) from the following listed application(s) (the “Priority Applications”), if any, listed below (e.g., claims earliest available priority dates for other than provisional patent applications or claims benefits under 35 USC §119(e) for provisional patent applications, for any and all parent, grandparent, great-grandparent, etc. applications of the Priority Application(s)). In addition, the present application is related to the “Related Applications,” if any, listed below.
None.
If the listings of applications provided above are inconsistent with the listings provided via an ADS, it is the intent of the Applicant to claim priority to each application that appears in the Priority Applications section of the ADS and to each application that appears in the Priority Applications section of this application.
All subject matter of the Priority Applications and the Related Applications and of any and all parent, grandparent, great-grandparent, etc. applications of the Priority Applications and the Related Applications, including any priority claims, is incorporated herein by reference to the extent such subject matter is not inconsistent herewith.
In one aspect, a regulated cooling device of a size, shape and calibration for use with a substantially thermally sealed storage container includes: a cooling region, an adiabatic region, a lid region, and an electronics unit attached to the lid region. In some embodiments, the regulated cooling device includes: a cooling region including an outer wall with an inner surface and an outer surface, at least one temperature sensor positioned adjacent to the outer surface of the outer wall, and a first region of thermal heat pipe positioned within the outer wall substantially parallel to the inner surface, the first region of the thermal heat pipe including a first end with a heat-absorbing interface. In some embodiments, the regulated cooling device includes: an adiabatic region including an insulation unit, the insulation unit including an outer surface of a size and shape to reversibly mate with a surface of an access conduit within a substantially thermally sealed storage container, the insulation unit including an inner surface of a size and shape to reversibly mate with an outer surface of the thermal heat pipe, and a second region of the thermal heat pipe positioned adjacent to the inner surface of the insulation unit. In some embodiments, the regulated cooling device includes: a lid region including a third region of the thermal heat pipe, the third region including a second end with a heat-releasing interface, a thermoelectric unit in contact with the second end of the thermal heat pipe, and a thermal dissipator unit in contact with the thermoelectric unit. In some embodiments, the regulated cooling device includes: an electronics unit attached to the lid region, including a microcontroller connected to the at least one temperature sensor, to the thermoelectric unit and to the thermal dissipator unit, and a power source attached to the microcontroller.
In one aspect, a regulated cooling device of a size, shape and calibration for use with a substantially thermally sealed storage container includes: a thermal heat pipe including a first end with a heat-absorbing interface, and a second end with a heat-releasing interface; an outer wall surrounding the first end of the heat pipe, the outer wall including an inner surface and an outer surface, the outer wall forming a phase change material-impermeable gap around the first end of the heat pipe; an end cap, the end cap sealed to an edge of the outer wall distal to the first end of the heat pipe; a phase change material within the phase change material-impermeable gap around the first end of the heat pipe; at least one temperature sensor positioned adjacent to the outer wall; an insulation unit surrounding the heat pipe at a region between the first end and the second end, the insulation unit including an outer surface of a size and shape to reversibly mate with a surface of an access conduit within a substantially thermally sealed storage container, the insulation unit including an inner surface of a size and shape to reversibly mate with an outer surface of the thermal heat pipe at the region between the first end and the second end; a thermoelectric unit in contact with the second end of the thermal heat pipe; a thermal dissipator unit in contact with the thermoelectric unit; a microcontroller connected to the at least one temperature sensor, to the thermoelectric unit and to the thermal dissipator unit; and an power source attached to the microcontroller.
In one aspect, a regulated cooling device of a size, shape and calibration for use with a substantially thermally sealed storage container includes: a substantially tubular thermal heat pipe including a first end with a heat-absorbing interface, and a second end with a heat-releasing interface; a phase change material-retaining unit surrounding the first end of the thermal heat pipe, the phase change material-retaining unit including an outer wall surrounding the first end of the heat pipe, the outer wall including an inner surface and an outer surface, the outer wall forming a phase change material-impermeable gap around the first end of the heat pipe, the inner surface positioned substantially parallel to an outer surface of the thermal heat pipe, an end cap sealed to a first edge of the outer wall distal to the first end of the heat pipe, and a phase change material within the phase change material-impermeable gap; a sensor conduit attached to the outer surface of the outer wall of the phase change material-retaining unit, the sensor conduit including a first temperature sensor positioned to detect temperature in a location adjacent to the end cap, and a second temperature sensor positioned to detect temperature in a location adjacent to the outer wall distal to the end cap; at least one capacitance sensor attached to the outer surface of the phase change material-retaining unit and positioned to detect capacitance across the phase change material within the phase change material-impermeable gap; an insulation unit surrounding the heat pipe at a region between the first end and the second end, the insulation unit including a lower surface sealed to a second edge of the outer wall of the phase change material-retaining unit, the insulation unit including an outer surface of a size and shape to reversibly mate with a surface of an access conduit within a substantially thermally sealed storage container, the insulation unit including an inner surface of a size and shape to reversibly mate with an outer surface of the thermal heat pipe at the region between the first end and the second end; an electronics conduit within the insulation unit, the electronics conduit including one or more wires attached to the first and second temperature sensors within the sensor conduit; a thermoelectric unit in thermal contact with the second end of the thermal heat pipe; a thermal dissipator unit in thermal contact with the thermoelectric unit; a microcontroller connected to the one or more connectors attached to the first and second temperature sensors, to the at least one capacitance sensor, to the thermoelectric unit and to the thermal dissipator unit; and an power source attached to the microcontroller.
In addition to the foregoing, other system aspects are described in the claims, drawings, and text forming a part of the disclosure set forth herein. The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
In the following detailed description, reference is made to the accompanying drawings, which form a part hereof. In the drawings, similar symbols typically identify similar components, unless context dictates otherwise. The illustrative embodiments described in the detailed description, drawings, and claims are not meant to be limiting. Other embodiments can be utilized, and other changes can be made, without departing from the spirit or scope of the subject matter presented here.
The use of the same symbols in different drawings typically indicates similar or identical items unless context dictates otherwise.
With reference now to
The substantially thermally sealed storage container 100 includes a single access conduit 130 connecting an outer wall 150 single aperture to an inner wall single aperture within the container (see, e.g.
The substantially thermally sealed storage container 100 illustrated in
The substantially thermally sealed storage container 100 can include one or more sealed access ports 120 to the gap between the inner wall and outer wall 150 (see, e.g.
The substantially thermally sealed storage container 100 can include, in some embodiments, one or more handles attached to an exterior surface of the container 100, wherein the handles are configured for transport of the container 100. The handles can be fixed on the surface of the container, for example welded, fastened or glued to the surface of the container. The handles can be operably attached but not fixed to the surface of the container, such as with a harness, binding, hoop or chain running along the surface of the container. The handles can be positioned to retain the container 100 with the access conduit 130 on the top of the container 100 during transport to minimize thermal transfer from the exterior of the container 100 through the access conduit 130.
The substantially thermally sealed storage container 100 can include electronic components. Although it may be desirable, depending on the embodiment, to minimize thermal emissions (i.e. heat output) within the container 100, electronics with thermal emissions can be operably attached to the exterior of the container 100 without providing heat to the interior of the container. For example, one or more positioning devices, such as GPS devices, can be attached to the exterior of the container. One or more positioning devices can be configured as part of a system including, for example, monitors, displays, circuitry, power sources, an operator unit, and transmission units. To the extent that circuitry is positioned within the interior region of a container during use of an embodiment, it is selected for low thermal emission properties as well as positioned and utilized to minimize thermal emissions.
Depending on the embodiment, one or more power sources can be attached to an exterior surface of the container 100, wherein the power source is configured to supply power to circuitry within the container or within a regulated cooling unit used with the container. For example, a solar unit can be attached to the exterior surface of the container 100. For example, a battery unit can be attached to the exterior surface of the container 100. For example, one or more wires can be positioned within the access conduit 130 to supply power to circuitry within the container or within a regulated cooling unit used with the container. For example, one or more power sources can be attached to an exterior surface of the container 100, wherein the power source is configured to supply power to circuitry within the container 100. For example, one or more power sources can be attached to an exterior surface of the container 100, wherein the power source is configured to supply power to circuitry integral to a regulated cooling unit. A power source can include wirelessly transmitted power sources, such as described in U.S. Patent Application No. 2005/0143787 to Boveja, titled “Method and system for providing electrical pulses for neuromodulation of vagus nerve(s), using rechargeable implanted pulse generator,” which is herein incorporated by reference. A power source can include a magnetically transmitted power source. A power source can include a battery. A power source can include a solar panel. A power source can include an AC power source with a converter to supply DC current to the circuitry within the container or within a regulated cooling unit used with the container.
Depending on the embodiment, one or more temperature sensors can be attached to an exterior surface of the container 100. The one or more temperature sensors can be configured, for example, to display the ambient temperature at the surface of the container. The one or more temperature sensors can be configured, for example, to transmit data to one or more system. The one or more temperature sensors can be configured, for example, as part of a temperature monitoring system.
Depending on the embodiment, one or more transmission units can be operably attached to the container 100. For example, one or more transmission units can be operably attached to the exterior surface of the container 100. For example, one or more transmission units can be operably attached to an interior unit within the container 100. For example, one or more transmission units can be operably attached to the cooling device utilized with the container 100. Depending on the embodiment, one or more receiving units can be operably attached to the container 100. For example, one or more receiving units can be operably attached to the exterior surface of the container 100. For example, one or more receiving units can be operably attached to an interior unit within the container 100. For example, one or more receiving units can be operably attached to the cooling device utilized with the container 100.
The outer assembly of the substantially thermally sealed storage container 100 includes at least one gap 210 between the inner wall 200 and the outer wall 150. One or more access ports 120 can provide access to the gap 210 during fabrication of the container 100, and then the access ports 120 can be sealed for container use. In some embodiments, an access port 120 can be opened during repair or refurbishment of a container 100, and then sealed for further use of the container 100. The outer assembly includes at least one section of ultra efficient insulation material within the gap 210 between the inner wall 200 and the outer wall 150. The at least one section of ultra efficient insulation material within the gap 210 can include aerogel. The at least one section of ultra efficient insulation material within the gap 210 can include a plurality of layers of ultra efficient insulation material. The at least one section of ultra efficient insulation material within the gap 210 can include at least one superinsulation material. The at least one section of ultra efficient insulation material within the gap 210 can substantially cover the inner wall 200 surface facing the gap 210. The at least one section of ultra efficient insulation material within the gap 210 can substantially cover the outer wall 150 surface facing the gap 210. The gap 210 between the inner wall 200 and the outer wall 150 can include substantially evacuated space, such as substantially evacuated space having a pressure less than or equal to 5×10−4 torr.
The outer assembly includes a single access conduit 130 connecting the single outer wall aperture 290 with the single inner wall aperture 280. The outer assembly and the one or more sections of ultra efficient insulation material can substantially define a single access aperture, including an access conduit 130 extending from an exterior surface of the storage container to an interior surface of the at least one thermally sealed storage region 220. The outer assembly and the one or more sections of ultra efficient insulation material can substantially define a single access aperture, and may include an access conduit 130 surrounding a single access aperture region, wherein the external wall 110 of the access conduit 130 extends from an exterior surface of the storage container 100 into a region adjacent to the exterior the container 100. In some embodiments, the access conduit 130 can extend beyond the outer wall 150 of the container 100, and include an external wall 110. The access conduit 130 can be configured to substantially define a tubular structure, such as in the embodiment shown in
The outer wall 110 of the access conduit 130 can be sealed to the inner wall 140 of the access conduit with a gas-impermeable seal 230. The outer wall 110 of the access conduit 130 can be sealed to the outer wall 150 of the container 100 with a gas-impermeable seal 235. The inner wall 140 of the access conduit 130 can be sealed to the inner wall 200 of the container 100 with a gas-impermeable seal 260. A gas-impermeable seal can include, for example, a weld or crimp joint.
In some embodiments, an outer assembly includes one or more sections of ultra efficient insulation material substantially defining at least one thermally sealed storage region 220. For example, the ultra efficient insulation material can be of a size and shape to substantially define at least one thermally sealed storage region 220. For example, the ultra efficient insulation material can be of suitable hardness and toughness to substantially define at least one thermally sealed storage region 220. In some embodiments, the outer assembly and the one or more sections of ultra efficient insulation material substantially define a single access aperture to the at least one thermally sealed storage region 220.
The at least one thermally sealed storage region 220 is configured to be maintained within a predetermined temperature range. For example, a container is designed to maintain a temperature range within the thermally sealed storage region for a period of days without additional cooling, or the addition of a heat sink such as ice. A container can include, for example, a thermally sealed storage region 220 that maintains its interior within a temperature range between approximately 2 degrees Centigrade and 8 degrees centigrade. Depending on factors including the heat loss from the container 100, the volume of the at least one thermally sealed storage region 220, the predetermined maintenance temperature range of the at least one thermally sealed storage region 220, and the ambient temperature in the region external to the container 100, a length of time for the at least one thermally sealed storage region 220 to remain within the predetermined maintenance temperature range without active cooling of the thermally sealed storage region 220 can be calculated using standard techniques. See Demko et al., “Design tool for cryogenic thermal insulation systems,” Advances in Cryogenic Engineering: Transactions of the Cryogenic Engineering Conference-CEC, 53 (2008), which is incorporated herein by reference. Therefore, various embodiments may be designed and configured to provide at least one thermally sealed storage region 220 remaining within the predetermined maintenance temperature range for a known period of time without active cooling, relative to factors including the volume of the thermally sealed storage region 220, the known heat loss from the particular container, the volume of a particular included heat sink material, the predetermined maintenance temperature range of the at least one thermally sealed storage region 220, and the ambient temperature in the region external to the container. For example, a substantially thermally sealed storage container 100 can be configured to maintain at least one thermally sealed storage region 220 at a temperature substantially between approximately 2 degrees Centigrade and approximately 8 degrees Centigrade for a period of 30 days with an ambient external temperature between 25 degrees Centigrade and 35 degrees Centigrade. For example, a substantially thermally sealed storage container 100 can be configured to maintain at least one thermally sealed storage region 220 at a temperature substantially between approximately 0 degrees Centigrade and approximately 10 degrees Centigrade for a period of 35 days with an average external temperature between 20 degrees Centigrade and 30 degrees Centigrade. For example, a substantially thermally sealed storage container 100 can be configured to maintain at least one thermally sealed storage region 220 at a temperature substantially between approximately −15 degrees Centigrade and approximately −25 degrees Centigrade for a period of 25 days with external temperatures in a range between 15 degrees Centigrade and 30 degrees Centigrade. For example, for a substantially thermally sealed storage container with an internal volume of 25 cubic liters including sufficient ultra efficient insulation material, 7 kilograms (kg) of purified water ice can be configured to maintain a temperature within the storage region 200 between approximately 2 degrees Centigrade and approximately 8 degrees Centigrade for a period of 30 days in an ambient external high temperature of approximately 30 degrees Centigrade.
Some embodiments include at least one temperature indicator. Temperature indicators can be located at multiple locations relative to the container. Temperature indicators can include temperature indicating labels, which may be reversible or irreversible. Temperature indicators suitable for some embodiments include, for example, the Environmental Indicators sold by ShockWatch Company, with headquarters in Dallas Tex., the Temperature Indicators sold by Cole-Palmer Company of Vernon Hills Ill. and the Time Temperature Indicators sold by 3M Company, with corporate headquarters in St. Paul Minn., the brochures for which are each hereby incorporated by reference. Temperature indicators suitable for some embodiments include time-temperature indicators, such as those described in U.S. Pat. Nos. 5,709,472 and 6,042,264 to Prusik et al., titled “Time-temperature indicator device and method of manufacture” and U.S. Pat. No. 4,057,029 to Seiter, titled “Time-temperature indicator,” each of which is herein incorporated by reference. Temperature indicators can include, for example, chemically-based indicators, temperature gauges, thermometers, bimetallic strips, or thermocouples.
The inner wall 200 and the outer wall 150 of the substantially thermally sealed storage container 100 can be fabricated from distinct or similar materials. The inner wall 200 and the outer wall 150 can be fabricated from any material of suitable hardness, strength, durability, cost or composition as appropriate to the embodiment. In some embodiments, one or both of the inner wall 200 and the outer wall 150 are fabricated from stainless steel, or a stainless steel alloy. In some embodiments, one or both of the inner wall 200 and the outer wall 150 are fabricated from aluminum, or an aluminum alloy. In some embodiments, one or both of the inner wall 200 and the outer wall 150 are fabricated from fiberglass, or a fiberglass composite. In some embodiments, one or both of the inner wall 200 and the outer wall 150 are fabricated from suitable plastic, which may include acrylonitrile butadiene styrene (ABS) plastic.
The term “ultra efficient insulation material,” as used herein, includes one or more type of insulation material with extremely low heat conductance and extremely low heat radiation transfer between the surfaces of the insulation material. The ultra efficient insulation material can include, for example, one or more layers of thermally reflective film, high vacuum, aerogel, low thermal conductivity bead-like units, disordered layered crystals, low density solids, or low density foam. In some embodiments, the ultra efficient insulation material includes one or more low density solids such as aerogels, such as those described in, for example: Fricke and Emmerling, Aerogels-preparation, properties, applications, Structure and Bonding 77: 37-87 (1992); and Pekala, Organic aerogels from the polycondensation of resorcinol with formaldehyde, Journal of Materials Science 24: 3221-3227 (1989), each of which is incorporated herein by reference. As used herein, “low density” can include materials with density from about 0.01 g/cm3 to about 0.10 g/cm3, and materials with density from about 0.005 g/cm3 to about 0.05 g/cm3. In some embodiments, the ultra efficient insulation material includes one or more layers of disordered layered crystals, such as those described in, for example: Chiritescu et al., Ultralow thermal conductivity in disordered, layered WSe2 crystals, Science 315: 351-353 (2007), which is herein incorporated by reference. In some embodiments, the ultra efficient insulation material includes at least two layers of thermal reflective film separated, for example, by at least one of: high vacuum, low thermal conductivity spacer units, low thermal conductivity bead like units, or low density foam. In some embodiments, the ultra efficient insulation material can include at least two layers of thermal reflective material and at least one spacer unit between the layers of thermal reflective material. For example, the ultra-efficient insulation material can include at least one multiple layer insulating composite such as described in U.S. Pat. No. 6,485,805 to Smith et al., titled “Multilayer insulation composite,” which is herein incorporated by reference. See also “Thermal Performance of Multilayer Insulations-Final Report,” Prepared for NASA 5 Apr. 1974, which is incorporated herein by reference. See also: Hedayat, et al., “Variable Density Multilayer Insulation for Cryogenic Storage,” (2000); “High-Performance Thermal Protection Systems Final Report,” Vol II, Lockheed Missiles and Space Company, Dec. 31, 1969; and “Liquid Propellant Losses During Space Flight,” NASA report No. 65008-00-4 Oct. 1964, which are herein incorporated by reference. For example, the ultra-efficient insulation material can include at least one metallic sheet insulation system, such as that described in U.S. Pat. No. 5,915,283 to Reed et al., titled “Metallic sheet insulation system,” which is incorporated herein by reference. For example, the ultra-efficient insulation material can include at least one thermal insulation system, such as that described in U.S. Pat. No. 6,967,051 to Augustynowicz et al., titled “Thermal insulation systems,” which is incorporated herein by reference. For example, the ultra-efficient insulation material can include at least one rigid multilayer material for thermal insulation, such as that described in U.S. Pat. No. 7,001,656 to Maignan et al., titled “Rigid multilayer material for thermal insulation,” which is herein incorporated by reference. See also Moshfegh, “A new thermal insulation system for vaccine distribution,” Journal of Building Physics 15:226-247 (1992), which is incorporated herein by reference.
In some embodiments, an ultra efficient insulation material includes at least one material described above and at least one superinsulation material. As used herein, a “superinsulation material” can include structures wherein at least two floating thermal radiation shields exist in an evacuated double-wall annulus, closely spaced but thermally separated by at least one poor-conducting fiber-like material.
In some embodiments, one or more sections of the ultra efficient insulation material includes at least two layers of thermal reflective material separated from each other by magnetic suspension. The layers of thermal reflective material can be separated, for example, by magnetic suspension methods including magnetic induction suspension or ferromagnetic suspension. For more information regarding magnetic suspension systems, see Thompson, Eddy current magnetic levitation models and experiments, IEEE Potentials, February/March 2000, 40-44, and Post, Maglev: a new approach, Scientific American, January 2000, 82-87, which are each incorporated herein by reference. Ferromagnetic suspension can include, for example, the use of magnets with a Halbach field distribution. For more information regarding Halbach machine topologies and related applications, see Zhu and Howe, Halbach permanent magnet machines and applications: a review, IEE Proc.-Electr. Power Appl. 148: 299-308 (2001), which is herein incorporated by reference.
In some embodiments, an ultra efficient insulation material can include at least one multilayer insulation material. For example, an ultra efficient insulation material can include multilayer insulation material such as that used in space program launch vehicles, including by NASA. See, e.g., Daryabeigi, Thermal analysis and design optimization of multilayer insulation for reentry aerodynamic heating, Journal of Spacecraft and Rockets 39: 509-514 (2002), which is herein incorporated by reference. Some embodiments include one or more sections of ultra efficient insulation material comprising at least one layer of thermal reflective material and at least one spacer unit adjacent to the at least one layer of thermal reflective material. In some embodiments, one or more sections of ultra efficient insulation material includes at least one layer of thermal reflective material and at least one spacer unit adjacent to the at least one layer of thermal reflective material. The low thermal conductivity spacer units can include, for example, low thermal conductivity bead-like structures, aerogel particles, folds or inserts of thermal reflective film. There may be one layer of thermal reflective film or more than two layers of thermal reflective film. Similarly, there can be greater or fewer numbers of low thermal conductivity spacer units, depending on the embodiment. In some embodiments, there are one or more additional layers within or in addition to the ultra efficient insulation material, such as, for example, an outer structural layer or an inner structural layer. An inner or an outer structural layer can be made of any material appropriate to the embodiment, for example an inner or an outer structural layer can include: plastic, metal, alloy, composite, or glass. In some embodiments, there can be one or more regions of high vacuum between layers of thermal reflective film and/or surrounding layers of thermal reflective film. Such regions of high vacuum can include substantially evacuated space, such as space with a gas pressure less than or equal to 5×10−4 torr. In some embodiments, the ultra efficient insulation material includes a plurality of layers of multilayer insulation, and substantially evacuated space surrounding the plurality of layers of multilayer insulation. For example, substantially evacuated space can have a persistent gas pressure less than or equal to 5×10−4 torr.
In the embodiment of a regulated cooling device 300 illustrated in
The regulated cooling device 300 illustrated in
The lid region 330 includes a thermal dissipator unit 390 positioned to dissipate heat to a region external to a substantially thermally sealed storage container when the regulated cooling device 300 is in use. The thermal dissipator unit 390 includes a plurality of thermal fins 395 positioned to radiate heat into the area surrounding the thermal dissipator unit 390, and external to the container. A fan is attached to the thermal dissipator unit 390 to increase heat transfer from the thermal fins 395. The fan is attached to the microcontroller in the electronics unit 335. The thermal dissipator unit 390 is in thermal contact with the “hot” side of the thermoelectric unit (see
The thermal dissipator unit 390 is protected by a cover 380. In some embodiments, the cover 380 is fabricated from a mesh structure to increase air flow around, and therefore heat transfer from, the thermal fins 395. In some embodiments, the cover can include, for example, a display on the external surface, configured to depict calculated values and information relative to the substantially thermally sealed storage container and the regulated cooling device 300. For example, a display can visually indicate the average temperature calculated from data from multiple temperature sensors attached to the cooling region 310 over time. For example, a display can visually indicate the calculated time remaining for a substantially thermally sealed storage region to maintain its temperature in a predetermined temperature range without active cooling from the regulated cooling device 300. A display can be connected to the microcontroller.
The regulated cooling device 300 includes an electronics unit 335 attached to the lid region 330. In some embodiments, the electronics unit 335 is modular, for example configured to be removed and replaced. In some embodiments, the electronics unit 335 includes modular components, for example individual components configured to be removed and replaced. In some embodiments, the electronics unit 335 is integral to the lid region 330. In some embodiments, the electronics unit 330 includes an external switch 337 connected to a microcontroller. The external switch 337 can be configured to allow an individual user to turn the electronics unit 330, and by extension the active cooling of the regulated cooling device 300, on and off. In some embodiments, the electronics unit 335 includes a display unit. In some embodiments, the electronics unit 335 includes a light, such as an LED light.
The electronics unit 335 includes a microcontroller. The microcontroller is an electronic microcontroller. The electronics unit 335 includes a microcontroller, the microcontroller connected to at least one temperature sensor attached to the cooling region 310, to a thermoelectric unit and to the thermal dissipator unit 390. For example, the microcontroller can be connected to other components with a wire connector. In embodiments wherein the thermal dissipator unit 390 includes a fan, the fan can be attached to, and under the control of, the microcontroller. The microcontroller is a low power microcontroller. In some embodiments, the microcontroller is configured to maintain a setpoint temperature relative to data from one or more temperature sensors positioned within the storage region of the container. For example, in some embodiments the microcontroller is configured to maintain a setpoint temperature relative to data accepted from one or more temperature sensors attached to the cooling region 310 of a regulated cooling device 300. For example, in some embodiments the microcontroller is configured to maximize the power efficiency of the regulated cooling device. For example, in some embodiments the microcontroller includes data with at least one look-up table and is configured to maintain temperature drops for a specific container by utilizing a look-up table corresponding to the specific container.
The electronics unit 335 includes a power source attached to the microcontroller. For example, in some embodiments a power source includes a solar energy-harvesting panel, for example a single 50 W solar panel, or a 30 W solar panel. For example, in some embodiments a power source includes a 12V battery, for example a 12V battery of a type often used in a vehicle. For example, in some embodiments a power source includes a connector to an energy grid, such as a municipal power source. In some embodiments, the electronics unit 335 is configured to accept energy from more than one power source. For example, in some embodiments the electronics unit includes a solar panel as well as a connector configured to attach to a 12V battery when sunlight is not available. The microcontroller is configured to utilize energy from the power source when available and to remain in a low-energy use mode (e.g. standby or sleep mode) otherwise. In some embodiments, the electronics unit 335 includes a power converter configured to convert electrical power from a power source to direct current (DC) to power the thermal dissipator unit 390. For example, in some embodiments the electronics unit 335 includes an electrical power converter operably connected to a fan within the thermal dissipator unit 390 and the thermoelectric unit (see, e.g.
The thermal heat pipe 400 is a wicking heat pipe. See, e.g. Kempers et al., “Characterization of Evaporator and Condenser Thermal Resistances of a Screen Mesh Wicked Heat Pipe,” International Journal of Heat and Mass Transfer, 51: 6039-6046 (2008), which is incorporated by reference. In some embodiments, for example, the thermal heat pipe 400 includes a wire mesh wick. In some embodiments, for example, the thermal heat pipe 400 includes a porous metal wick. The thermal heat pipe 400 includes an internal working fluid. The internal working fluid within the heat pipe 400 is of a type that is operational at subzero (Centigrade) temperatures. The thermal heat pipe 400 is configured to minimize resistance to thermal transfer from the first end of the heat pipe 400 with the heat-absorbing interface to the second end of the heat pipe 400 with the heat-releasing interface when the thermoelectric unit connected to the heat-releasing interface is active (e.g. “on”). Correspondingly, the thermal heat pipe 400 is configured to maximize resistance to thermal transfer from the first end of the heat pipe 400 with the heat-absorbing interface to the second end of the heat pipe 400 with the heat-releasing interface when the thermoelectric unit connected to the heat-releasing interface is inactive (e.g. “off”).
The regulated cooling device 300 includes at least one temperature sensor positioned adjacent to the outer wall 350 (see, e.g.
The regulated cooling device 300 also includes a thermoelectric unit 430 in contact with the second end of the thermal heat pipe 400. The thermoelectric unit 430 is configured to transfer heat from a first, or “cold,” surface through the unit to a second, or “hot,” surface in the presence of voltage through the thermoelectric effect. In some embodiments, the thermoelectric unit 430 can include a Peltier effect device. See: Abdul-Wahab et al., “Design and Experimental Investigation of Portable Solar Thermoelectric Refrigerator,” Renewable Energy, 34:30-34 (2009); Astrain et al., “Computational Model for Refrigerators Based on Peltier Effect Application,” Applied Thermal Engineering 25: 3149-3162 (2005); Chatterjee and Pandey, “Thermoelectric Cold-Chain Chests for Storing/Transporting Vaccines in Remote Regions,” Applied Energy 76:415-433 (2003); Dai et al., “Experimental Investigation and Analysis on a Thermoelectric Refrigerator Driven by Solar Cells,” Solar Energy Materials & Solar Cells 77: 377-391 (2003); Ghoshal and Guha, “Efficient Switched Thermoelectric Refrigerators for Cold Storage Applications,” Journal of Electronic Materials, doi: 10.1077/s11664-009-0725-3 (2009); Jiajitsawat, “A Portable Direct-PV Thermoelectric Vaccine Refrigerator with Ice Storage Through Heat Pipes,” Dissertation, University of Massachusetts, Lowell, (2008); Omer and Infield, “Design Optimization of Thermoelectric Devices for Solar Power Generation,” Solar Energy Materials & Solar Cells, 53: 67-82 (1998); Omer et al., “Experimental Investigation of a Thermoelectric Refrigeration System Employing a Phase Change Material Integrated with Thermal Diode (Thermosyphons),” Applied Thermal Engineering 21: 1265-1271 (2001); Riffat et al., “A Novel Thermoelectric Refrigeration System Employing Heat Pipes and a Phase Change Material: an Experimental Investigation,” Renewable Energy 23: 313-323 (2001); Rodriguez et al., “Development and Experimental Validation of a Computational Model in Order to Simulate Ice Cube Production in a Thermoelectric Ice Maker,” Applied Thermal Engineering (2009), doi: 10.1016/j.applthermaleng.2009.03.005; Russel et al., “Characterization of a Thermoelectric Cooler Based Thermal Management System under Different Operating Conditions,” Applied Thermal Engineering (2012), doi: 10.1016/j.applthermaleng.2012.05.002; and Vián and Astrain, “Development of a Thermoelectric Refrigerator with Two-phase Thermosyphons and Capillary Lift,” Applied Thermal Engineering (2008), doi: 10.1016/j.applthermaleng.2008.09.018; which are each incorporated by reference.
The regulated cooling device 300 includes a thermal dissipator unit 390 in contact with the hot side of the thermoelectric unit 430. For example, the thermal dissipator unit 390 can be in physical contact with the thermoelectric unit 430. For example, the thermal dissipator unit 390 can be in thermal contact with the thermoelectric unit 430 through an intermediate thermal transfer material. For example, the thermal dissipator unit 390 can be in thermal contact with the thermoelectric unit 430 through an intermediate transfer material fabricated from a copper sheet in physical contact with both the thermal dissipator unit 390 and the thermoelectric unit 430. In some embodiments, a thermal transfer unit 460 is positioned in contact with the second end of the thermal heat pipe 400 and its heat-releasing interface as well as positioned in contact with the thermoelectric unit 430. A thermal transfer unit can be, for example, a metal or metal alloy with thermal conductivity above 200 W/mK. For example, a thermal transfer unit can include copper, aluminum, or silver.
The regulated cooling device 300 includes a microcontroller connected to the at least one temperature sensor, to the thermoelectric unit 430 and to the thermal dissipator unit 390. The regulated cooling device 300 includes a power source attached to the microcontroller. For example, the regulated cooling device can include a microcontroller and a power source within an electronics unit 335. For example, the regulated cooling device can include a microcontroller and a power source within the lid region 330.
The cooling region 310 illustrated in
The outer wall 350 of the cooling region 310 is fabricated from a material with sufficient thermal transfer properties to allow for thermal transfer between the cooling region 310 and the interior of an adjacent substantially thermally sealed storage container. The outer wall 350 is fabricated from a material that also has sufficient strength and durability within the temperature and physical stress parameters of a specific embodiment. For example, in some embodiments the outer wall 350 is fabricated from aluminum, or a polycarbonate plastic material. In some embodiments, it may be desirable to visualize the phase change material within the outer wall 350, for example to see if it is evenly dispersed, if it has frozen, or if there is a sufficient quantity of phase change material. For example, in some embodiments the outer wall 350 is fabricated from a substantially transparent material. For example, in some embodiments the outer wall is fabricated from a substantially transparent plastic material.
The outer wall and the end cap of the cooling region substantially enclose a phase change material. See: Oró et al., “Review on Phase Change Materials (PCMs) for Cold Thermal Energy Storage Applications,” Applied Energy 99: 513-533 (2012); Azzouz et al., “Improving the Energy Efficiency of a Vapor Compression System Using a Phase Change Material,” Second Conference on Phase Change Material & Slurry: Scientific Conference & Business Forum, 15-17 Jun., 2005, Yverdon-les-Bains, Switzerland; Chiu and Martin, “Submerged Finned Heat Exchanger Latent Heat Storage Design and its Experimental Verification,” Applied Energy 93: 507-516 (2012): Groulx and Ogoh, “Solid-Liquid Phase Change Simulation Applied to a Cylindrical Latent Heat Energy Storage System,” Excerpt from the Proceedings of the COMSOL Conference, Boston (2009); Conway et al., “Improving Cold Chain Technologies through the Use of Phase Change Material,” Thesis, University of Maryland (2012); Robak et al., “Enhancement of Latent Heat Energy Storage Using Embedded Heat Pipes,” International Journal of Heat and Mass Transfer 54: 3476-3483 (2011); Sharifi et al., “Heat Pipe-Assisted Melting of a Phase Change Material,” International Journal of Heat and Mass Transfer 55: 3458-3469 (2012); and Stampa and Nieckele, “Numerical Study of Ice Layer Growth Around a Vertical Tube,” Engenharia Térmica (Thermal Engineering) 4(2): 138-144 (2005), which are each incorporated by reference. The selection of a phase change material within the cooling region of the device depends on the embodiment. Factors to be considered in selecting a phase change material for an embodiment include; cost, mass, toxicity, thermal properties, phase change temperatures, and expansion properties of a specific phase change material. In some embodiments, a phase change material includes water and ice. In some embodiments, a phase change material includes an organic material. In some embodiments, a phase change material includes an inorganic material.
In some embodiments, the region 310 includes a phase change material that has a liquid state and a frozen state during use of the device in a specific temperature range. The two states of the phase change material can have different dielectric properties, such as different dielectric constants. For example, in some embodiments the cooling region 310 includes a phase change material that includes water that freezes into ice during use of the regulated cooling device 300. The outer wall 350 material utilized in those embodiments should be durable through the freeze/thaw process. For example, in some embodiments, during use of the regulated cooling device 300, the cooling region 310 includes a phase change material that includes water within the outer wall 350, and approximately ⅔ of the water is maintained as ice at a position adjacent to the heat pipe 400 during the entire period of use of the regulated cooling device 300 within a container, while the remaining ⅓ of the water alternately freezes and thaws during on/off cycles of the regulated cooling device 300. For example, in some embodiments, during use of the regulated cooling device 300, the cooling region 310 includes approximately 600 g of water within the outer wall 350, and approximately 400 g of the water is maintained as ice at a position adjacent to the heat pipe 400 during the entire period of use of the regulated cooling device 300 within a container, while the remaining approximately 200 g of the water alternately freezes and thaws during on/off cycles of the regulated cooling device 300.
The cooling region 310 includes a first region of thermal heat pipe 400 positioned within the outer wall 350 substantially parallel to the inner surface of the outer wall 350, wherein the first region of the thermal heat pipe 400 includes a first end with a heat-absorbing interface. As shown in
In some embodiments, the cooling region 310 includes a phase change material-retaining unit with an outer boundary substantially formed by the outer wall 350, and phase change material within the phase change material-retaining unit. In some embodiments, the first region of the thermal heat pipe 400 has an outer surface, the outer surface positioned substantially parallel to the inner surface of the outer wall 350 of the cooling region 310, with a phase change material-impermeable gap between the outer surface of the heat pipe and the inner surface of the outer wall 350 of the cooling region 310. Some embodiments include phase change material within the phase change material-impermeable gap. Phase change material is selected for a specific embodiment based on factors including the predetermined temperature range of use, thermal transmission properties, mass, density, toxicity and cost. Phase change material within the cooling region 310 can include, for example, liquid water or ice. In embodiments wherein water is included as a phase change material and the predetermined temperature range for a storage region adjacent to the regulated cooling device 300 is in the range of approximately 0 degrees Centigrade to approximately 10 degrees Centigrade, up to 0.5% w/w of silver iodide can be included with the phase change material to reduce the potential supercooling of the water.
As illustrated in
In some embodiments, the adiabatic region 320 includes a stabilizer unit 360, positioned adjacent to the junction between the outer wall 350 of the cooling region 310 and the insulation unit 370. In some embodiments, the adiabatic region 320 includes a stabilizer unit 360 attached to a first end of the insulation unit 370 and to the outer surface of the outer wall 350 of the cooling region 310 at a position distal to the first end of the thermal heat pipe 400. In some embodiments, the stabilizer unit 360 is attached to the insulation unit 370 with one or more fasteners 420. In some embodiments, the stabilizer unit 360 is attached to the insulation unit 370 and to the outer wall 350 to form a liquid-impermeable junction between the insulation unit 370 and the outer wall 350. The stabilizer 360 can be fabricated, for example, from a durable plastic material. A stabilizer should be fabricated from a material with sufficient durability for use in the expected temperature ranges for the regulated cooling device 300, and with low thermal transfer properties in the expected temperature ranges.
In some embodiments, the insulation unit 370 of the adiabatic region 320 includes a medicinal storage cup 470 attached to the insulation unit 370 at a region of the insulation unit 370 proximal to the cooling region 310. In the embodiment illustrated in
During use of a regulated cooling device 300 including a medicinal storage cup 470 within a substantially thermally sealed storage container, the regulated cooling device 300 can be partially lifted out of the container by a user to quickly and easily access one or more medicinal units within the medicinal storage cup 470. During use of a regulated cooling device 300 including a medicinal storage cup 470 within a substantially thermally sealed storage container, one or more medicinal units within the medicinal storage cup can be stored in a position that maintains them within the predetermined temperature range of the regulated cooling device 300, as well as in an easily accessible location for a user, such as a medical caregiver.
In some embodiments, the insulation unit 370 of the adiabatic region 320 includes a wire conduit within the insulation unit 370, the wire conduit including an internal surface configured to mate with an outer surface of a wire. See, e.g.
In the embodiment illustrated in
The lid region 330 includes a surface, adjacent to the adiabatic region 320, which is configured to reversibly mate with an external surface of a substantially thermally sealed storage container. For example, the surface can be of a size and shape to conform with the size and shape of an external surface of a substantially thermally sealed storage container, such as the end of an access conduit (see, e.g.
In some embodiments and as depicted in
In some embodiments, the regulated cooling device 300 is constructed so that it functions efficiently when positioned with its main linear axis substantially upright, such as illustrated in
In some embodiments, a regulated cooling device 300 includes a substantially tubular thermal heat pipe including a first end with a heat-absorbing interface, and a second end with a heat-releasing interface. In some embodiments, a regulated cooling device 300 includes a phase change material-retaining unit surrounding the first end of the thermal heat pipe, the phase change material-retaining unit including an outer wall surrounding the first end of the heat pipe, the outer wall including an inner surface and an outer surface, the outer wall forming a phase change material-impermeable gap around the first end of the heat pipe, the inner surface positioned substantially parallel to an outer surface of the thermal heat pipe, an end cap sealed to a first edge of the outer wall distal to the first end of the heat pipe, and a phase change material within the phase change material-impermeable gap. In some embodiments, a regulated cooling device 300 includes a sensor conduit attached to the outer surface of the outer wall of the phase change material-retaining unit, the sensor conduit including a first temperature sensor positioned to detect temperature in a location adjacent to the end cap, and a second temperature sensor positioned to detect temperature in a location adjacent to the outer wall distal to the end cap. See, e.g.
The cooling region 310 of the regulated cooling device 300 shown in
The sensor conduit 500 includes one or more sensors configured to detect one or more conditions in the region adjacent to the outer wall 350 of the cooling region 310. During use of the regulated cooling device 300, the sensors are positioned to detect conditions within a substantially thermally sealed storage region of a container (see, e.g.
The sensors within the sensor conduit 500 include at least one temperature sensor. In some embodiments, one or more sensors within the sensor conduit 500 are resistance temperature detectors. For example, one or more sensors within the sensor conduit 500 can be Pt100 (platinum 100Ω) resistance temperature detectors in a 3-wire configuration. In some embodiments, one or more sensors within the sensor conduit 500 are thermistors. In some embodiments, the one or more sensors within the sensor conduit 500 are thermocouples. For example, in some embodiments temperature accuracy does not require a system error of less than 1 degree Centigrade, and the one or more sensors within the sensor conduit 500 are thermocouples. In some embodiments, one or more sensors within the sensor conduit 500 are integrated circuit temperature sensors. In embodiments including integrated circuit temperature sensors, the integrated circuit temperature sensors can include insulation configured to minimize condensation within the temperature sensors during use. The at least one temperature sensor is attached to a connector, the connector capable of transferring data from the temperature sensor to the microcontroller. The at least one temperature sensor is attached to a connector, the connector capable of transferring power from the microcontroller to the temperature sensor. For example, in some embodiments one or more temperature sensor is positioned within a substantially hollow sensor conduit 500, and one or more wire connectors are positioned within the substantially hollow sensor conduit 500, the one or more wires connecting the one or more temperature sensor to the microcontroller. For example, in some embodiments one or more temperature sensor is positioned within a substantially hollow sensor conduit 500, and one or more fiber optic connectors are positioned within the substantially hollow sensor conduit 500, the one or more fiber optic connectors connecting the one or more temperature sensor to the microcontroller.
The embodiment illustrated in
The cooling unit 310 includes a plurality of electrodes 610 A, 610 B, 610 C, 610 D, 610 E, 610 F, 610 G, 610 H, 610 I, 610 J, 610 K, 610 L, 610 M, 610 N, 610 O and 610 P, positioned adjacent to the outer surface of the outer wall 350. The plurality of electrodes 610 A, 610 B, 610 C, 610 D, 610 E, 610 F, 610 G, 610 H, 610 I, 610 J, 610 K, 610 L, 610 M, 610 N, 610 O and 610 P are collectively referred to as “electrodes 610” with reference to the figures herein. In some embodiments, the electrodes 610 are attached to the outer surface of the outer wall 350, for example with adhesive. The electrodes are fabricated from electrically conductive material, as suitable to a particular embodiment. For example, in some embodiments the electrodes are fabricated from copper. In the embodiment shown in
A guard electrode 600 encircles the outer surface of the electrodes 610. The guard electrode can be, for example, fabricated from copper. The guard electrode 600 is of a size and shape to encircle the electrodes 610 without coming in physical contact with the electrodes 610. In some embodiments, each of the electrodes 610 include an outer surface that is positioned substantially in parallel with the interior surface of the guard electrode 600. In some embodiments, the guard electrode 600 is earthed. A gap 620 is positioned between the outer surface of the electrodes 610 and the inner surface of the guard electrode 600. In some embodiments, the gap 620 includes an insulator material. For example, the gap 620 can include an electrically insulating spacer material.
The electrodes 610 are positioned to measure the dielectric capacitance across the adjacent region of the outer wall 350 of the cooling region 310 of the device. The electrodes 610 are connected to the microcontroller in the electronics unit 335 with a wire connection. A wire connecting the electrodes 610 and the microcontroller can, for example, be positioned adjacent to the outer surface of the heat pipe. A wire connecting the electrodes 610 and the microcontroller can, for example, be positioned within the sensor conduit and along with the connector between the sensors and the microcontroller.
A heat pipe 400 is positioned within the circumference of the outer wall 350, approximately parallel to the inner surface of the outer wall. The heat pipe 400 is positioned approximately along the central axis of the cooling unit 310. A gap 410 is located between the outer surface of the heat pipe 400 and the inner surface of the outer wall 350. During use of the device, a phase change material with different dielectric properties in its distinct phases is positioned within the gap 410. For example, in some embodiments the phase change material is water and ice.
In the embodiment illustrated, a phase change material is positioned within the gap 410. The phase change material has at least two states with different dielectric properties. For example, the phase change material can be water and ice. Phase change material in a first phase 700 is located adjacent to the exterior surface of the heat pipe 400. Phase change material in a second phase 710 is located adjacent to the interior surface of the outer wall 350. The first phase 700 is the colder state of the phase change material, positioned adjacent to the cooling surface of the heat pipe 400. For example, in some embodiments, the first phase of the phase change material is ice. The second phase 710 is the warmer state of the phase change material, positioned distal to the cooling surface of the heat pipe 400. For example, in some embodiments, the second phase of the phase change material is water.
The electrodes of a cooling unit are attached to the outer wall of the cooling unit and positioned to measure the dielectric capacitance across the diameter of the adjacent cooling region, including the first phase of the phase change material and the second phase of the phase change material. The dielectric capacitance measurements can serve, inter alia, as a basis for calculating the relative amounts of a first phase of a phase change material and a second phase of a phase change material within the cooling region. For example, in some embodiments the phase change material is water and ice, and the dielectric capacitance measurements from the electrodes are the basis for calculating the relative volume of water to ice within the cooling region of the device at a given time. Multiple dielectric capacitance measurements taken from a device at different points in time can serve, inter alia, as the basis for calculating the relative volume of water to ice within the cooling region of the device over time. More information regarding measurements of dielectric capacitance can be found, for example, in: “Capacitive Probe for Ice Detection and Accretion Rate Measurement: Proof of Concept,” Owusu, Master of Science thesis, Department of Mechanical Engineering, University of Manitoba (2010); Mughal et al., “Review of Capacitive Atmospheric Icing Sensors,” The Sixth International Conference on Sensor Technologies and Applications, (SENSORCOMM 2012); Peng et al., “Determination of the Optimal Axial Length of the Electrode in an Electrical Capacitance Tomography Sensor,” Flow Measurement and Instrumentation 16:169-175 (2005); Peng et al., “Evaluation of Effect of Number of Electrodes in ECT Sensors on Image Quality,” IEEE Sensors Journal 12 (5): 1554-1565 (2012); and Yu et al., “Comparison Study of Three Common Technologies for Freezing-Thawing Measurement,” Advances in Civil Engineering, doi:10.1155/2010/239651 (2010), which are each incorporated herein by reference. More information regarding measurements of annular capacitance, including the use of two different excitation potentials, can be found, for example, in: Mohamad et al., “An Analysis of Sensitivity Distribution Using Two differential Excitation Potentials in ECT,” IEEE Fifth International Conference on Sensing Technology, 575-580, (2011); Mohamad et al., “A Introduction of Two Differential Excitation Potentials Technique in Electrical Capacitance Tomography,” Sensors and Actuators A, 180 1-10 (2012); and Ye and Yang, “Evaluation of Electrical Capacitance Tomography Sensors for Concentric Annulus,” IEEE Sensors Journal, 13 (2) 446-456 (2013), which are each incorporated herein by reference.
During use of a regulated cooling device, the changes in inter-electrode capacitance due to the change in distribution and phase of a phase change material with a first phase having a first dielectric constant and a second phase having a second dielectric constant within the cooling region are measured with the electrodes integral to the cooling region. Capacitance measurement data from the electrodes is received by the microcontroller and used, for example, as a basis to calculate a 2-dimensional, cross-sectional profile of the permittivity distribution internal to the cooling region. Each pair of electrodes positioned in parallel across the circumference of the cooling region (e.g. electrode 610 K and electrode 610 L as shown in
For example, in an embodiment such as that shown in
During measurement of capacitance with the electrodes, each of the excitation electrodes within each of the capacitive circuit pairs is excited in series along the length of the axis of the cooling region. For example, in an embodiment such as illustrated in
For initial calibration of an embodiment of a device with a specific configuration of electrodes and a specific phase change material, capacitance measurements are taken with the phase change material substantially in the first phase, and again with the phase change material substantially in the second phase. For example, in an embodiment utilizing water as a phase change material, an initial calibration can include a series of measurements taken when the phase change material is substantially water, and another series of measurements taken when the phase change material is substantially ice. The data from each of the first and second phase measurements is then used to normalize the capacitance data when the device includes both the first phase and the second phase of the phase change material (e.g. water and ice). The resulting values for each capacitive circuit pair can then be calculated as a unitless number between 0 and 1.
The lid region 330 includes a thermal dissipator unit 390. The thermal dissipator unit 390 is configured to radiate heat to the ambient air surrounding the thermal dissipator unit 390. The thermal dissipator unit 390 includes a cover 380 positioned over at least one fan unit and a plurality of thermal fins.
The lid region 330 of the embodiment illustrated in
The electronics unit 335 includes a switch 337. The switch 337 can be, for example, a binary toggle switch attached to a microcontroller internal to the electronics unit 335. The switch 337 can, for example, be attached to the electronics unit 335 as an “on/off” switch for the regulated cooling unit. The switch 337 can be a binary switch attached to the interior components of the electronics unit. For example, the switch 337 can be attached to the microcontroller within the electronics unit 335 to operate as an on/off switch for the regulated cooling device 300. In some embodiments, the electronics unit 335 includes a visual display 800, such as a liquid crystal display (LCD) or an electrophoretic ink display. In some embodiments, the electronics unit includes a switch 820, for example a binary button switch. The switch 820 can be attached to a microcontroller internal to the electronics unit 335. A switch 820 can, for example, be wired to the microcontroller and the microcontroller can be configured to initiate a specific display in response to a signal from the switch 820. The switch 820 can, for example, be operably attached to the microcontroller so that a signal created by the motion of the switch results in the microcontroller sending a signal, such as an initiation signal, to the display 800. In some embodiments, the electronics unit 335 includes a light 810, for example one or more light-emitting diodes (LEDs). The light 810 can be operably attached to the microcontroller. For example, a light may be configured to turn on and off in response to a signal from the microcontroller. For example, a microcontroller may be configured to send a signal to a light (e.g. “turn on”) in response to parameters included in one or more look-up tables integrated into the circuitry of the microcontroller, such as temperature data within a preset range or capacitance data within a preset range.
The regulated cooling unit includes a cooling region 310 positioned within the interior of the substantially thermally sealed storage region 220 of the substantially thermally sealed container 100. The cooling region 310 is attached at one end to the adiabatic region of the regulated cooling unit, which suspends the cooling region 310 approximately along the upper region of a central axis of the substantially thermally sealed storage region 220 of the substantially thermally sealed container 100. The cooling region 310 is positioned to not contact the inner wall 200 of the substantially thermally sealed storage region 220. In the embodiment illustrated, a storage structure 900 is affixed to the inner wall 200. The cooling region 310 of the regulated cooling unit does not contact the storage structure. During use of the substantially thermally sealed container 100, one or more storage units can be stabilized in position within the substantially thermally sealed storage region 220 by the storage structure. The cooling region 310 of the regulated cooling unit is positioned to not contact any storage units within the substantially thermally sealed storage region 220 during use of the container 100. For example, in some embodiments, one or more storage units can be positioned with at least a 2 centimeter (cm) space between the outer surface of the outer wall 350 of the cooling unit 310 and the one or more storage units. For example, in some embodiments, one or more storage units can be positioned with at least a 4 cm space between the outer surface of the outer wall 350 of the cooling unit 310 and the one or more storage units.
The cooling region 310 of the regulated cooling unit illustrated in
As shown in
The regulated cooling unit includes a lid region 330 positioned adjacent to the outer surface of the substantially thermally sealed container 100 at the end of the single access conduit 130. In the embodiment illustrated, the single access conduit 130 is substantially internal to the container 100 (e.g. the single access conduit 130 does not include an outer wall as shown in the embodiment illustrated in
The lid region 330 of the regulated cooling unit includes a thermoelectric unit 430 positioned in thermal contact with the end of the thermal heat pipe 400. The thermoelectric unit 430 is positioned to transfer thermal energy (i.e. heat) away from the thermal heat pipe 400. A thermal transfer unit 460 surrounds the end of the thermal heat pipe 400 at a position adjacent to the thermoelectric unit 430. The thermal transfer unit 460 is configured to transfer thermal energy (i.e. heat) away from the thermal heat pipe 400 and to transfer that energy to the thermoelectric unit 430. At times when the thermoelectric unit 430 is powered (i.e. “turned on”), the thermoelectric unit 430 transfers thermal energy from the side adjacent to the thermal heat pipe to the side adjacent to the thermal dissipator unit 390, thereby transferring thermal energy from the thermal heat pipe 400 to the thermal dissipator unit 390. The thermal dissipator unit 390 is attached to the lid region 330 in a position so that a portion of the thermal dissipator unit 390 projects from the exterior of the lid region 330. The thermal dissipator unit 390 includes a plurality of thermal fins 395 and a cover 380 positioned adjacent to the distal ends of the thermal fins 395. The thermal dissipator unit 390 includes at least one fan positioned to increase air circulation around, and therefore thermal transfer from, the thermal fins 395.
In the embodiment illustrated in
In the embodiment shown in
The cooling region 310 of the regulated cooling device includes a thermal heat pipe 400 and an outer wall 350 positioned around the thermal heat pipe 400. An end cap 355 is positioned at the distal end of the outer wall 350 and surrounding the end of the thermal heat pipe 400. A sensor conduit 500 is positioned adjacent to the exterior surface of the outer wall 350. The sensor conduit 500 is located substantially parallel to the outer wall 350, and the thermal heat pipe 400. A fastener 510 holds the sensor conduit 500 in position at the distal end of the sensor conduit 500 in a location adjacent to the end cap 355. As shown in
The outer wall 350 of the cooling unit 310 is stabilized in position relative to the insulation unit with a stabilizer 360. An aperture in the stabilizer 360 corresponds with the exterior dimensions of the sensor conduit 500 and a corresponding aperture within the insulation unit 370. The insulation unit 370 includes an outer surface configured to reversibly mate with the inner surface of the single access conduit 130 within the container 100 between the substantially thermally sealed storage region 220 and the region exterior to the container 100.
A lid region 330 is positioned adjacent to the top surface of the container 100. The lid region 330 includes a first wall 385 substantially surrounding the exterior of the lid region 330. The lid region includes a second wall 440 with an outer surface configured to reversibly mate with the external surface of the container 100 in a region adjacent to the exterior edge of the single access conduit 130. The lid region 330 includes a handle 340 positioned to assist a user of the regulated cooling device to move the device, for example into and out of the container 100.
The interior of the lid region 330 includes a thermoelectric unit 430 positioned adjacent to the end of the thermal heat pipe 400. The thermoelectric unit 430 is positioned with maximal thermal contact with the end of the thermal heat pipe 400. A thermal transfer unit 460 surrounds the end of the thermal heat pipe 400 adjacent to the thermoelectric unit 430. The thermal transfer unit 460 is positioned to transfer thermal energy (i.e. heat) from the surface of the end of the thermal heat pipe 400 adjacent to the thermoelectric unit 430 to the thermoelectric unit 430. The lid region 330 also includes a thermal dissipator unit 390 positioned adjacent to a surface of the thermoelectric unit 430 distal to the thermal heat pipe 400. The thermoelectric unit 430 is positioned between the end of the thermal heat pipe 400 and the thermal dissipator unit 390 in order to transfer heat from the end of the thermal heat pipe 400 to the thermal dissipator unit 390. The thermal dissipator unit 390 includes a plurality of thermal fins 395 oriented to transfer heat from the thermoelectric unit 430 to the ambient air surrounding the plurality of thermal fins 395. At least one fan is positioned adjacent to the plurality of thermal fins 395 to increase air flow around the plurality of thermal fins 395. A cover 380 is positioned adjacent to the top edge of the lid region 330. The cover 380 is of a size and shape to permit air flow around the plurality of thermal fins 395.
In the embodiment shown in
The lid region 330 includes a thermal dissipator unit 390 in thermal contact with the face of the thermoelectric unit 430 distal to the end of the thermal heat pipe 400. The thermal dissipator unit 390 is positioned to transfer heat from the surface of the thermoelectric unit 430 to the environmental air surrounding the thermal dissipator unit 390. In the embodiment shown in
A regulated cooling device was fabricated as described. The cooling region of the regulated cooling device included four Pt100 resistance temperature sensors in a three-wire configuration. The four temperature sensors were affixed to the outer wall of the cooling region. The four temperature sensors were connected to a microcontroller in the lid region of the device with a wire connector. The microcontroller was configured to send and receive electrical signals from the attached temperature sensors, as well as to record in memory the data received from the attached temperature sensors. The cooling region of the regulated cooling device included water and ice.
As a test of the regulated cooling device in use, the regulated cooling device was positioned within a substantially thermally sealed container, (see, e.g.,
The claims, description, and drawings of this application may describe one or more of the instant technologies in operational/functional language, for example as a set of operations to be performed by a computer. Such operational/functional description in most instances refers to specifically-configured hardware (e.g., because a general purpose computer in effect becomes a special purpose computer once it is programmed to perform particular functions pursuant to instructions from program software).
The logical operations/functions described herein are a distillation of machine specifications or other physical mechanisms specified by the operations/functions such that the otherwise inscrutable machine specifications can be comprehensible to a human reader. The distillation also allows for adaptation of the operational/functional description of the technology across many different specific vendors' hardware configurations or platforms, without being limited to specific vendors' hardware configurations or platforms.
Some of the present technical description (e.g., detailed description, drawings, claims, etc.) may be set forth in terms of logical operations/functions. As described in more detail herein, these logical operations/functions are not representations of abstract ideas, but rather are representative of static or sequenced specifications of various hardware elements. The logical operations/functions set forth in the present technical description are representative of static or sequenced specifications of various ordered-matter elements, in order that such specifications can be comprehensible to the human mind and adaptable to create many various hardware configurations. The logical operations/functions disclosed herein are presented for ready understanding and application in a manner independent of a specific vendor's hardware implementation. Differently stated, unless context dictates otherwise, the logical operations/functions should be understood to be representative of static or sequenced specifications of various hardware elements. This is true because tools available to one of skill in the art to implement technical disclosures set forth in operational/functional formats—tools in the form of a high-level programming language (e.g., C, java, visual basic), etc.), or tools in the form of Very high speed Hardware Description Language (“VHDL,” which is a language that uses text to describe logic circuits)—are generators of static or sequenced specifications of various hardware configurations. This fact is sometimes obscured by the broad term “software,” but this term is a shorthand for a massively complex interchaining/specification of ordered-matter elements. The term “ordered-matter elements” can refer to physical components of computation, such as assemblies of electronic logic gates, molecular computing logic constituents, quantum computing mechanisms, etc.
The state of the art has progressed to the point where there is little distinction left between hardware, software, and/or firmware implementations of aspects of systems; the use of hardware, software, and/or firmware is generally (but not always, in that in certain contexts the choice between hardware and software can become significant) a design choice representing cost vs. efficiency tradeoffs. There are various vehicles by which processes and/or systems and/or other technologies described herein can be effected (e.g., hardware, software, and/or firmware), and that the preferred vehicle will vary with the context in which the processes and/or systems and/or other technologies are deployed. For example, if an implementer determines that speed and accuracy are paramount, the implementer can opt for a mainly hardware and/or firmware vehicle; alternatively, if flexibility is paramount, the implementer can opt for a mainly software implementation; or, yet again alternatively, the implementer can opt for some combination of hardware, software, and/or firmware in one or more machines, compositions of matter, and articles of manufacture. Hence, there are several possible vehicles by which the processes and/or devices and/or other technologies described herein can be effected, none of which is inherently superior to the other in that any vehicle to be utilized is a choice dependent upon the context in which the vehicle will be deployed and the specific concerns (e.g., speed, flexibility, or predictability) of the implementer, any of which can vary. Optical aspects of implementations will typically employ optically-oriented hardware, software, and or firmware.
In some implementations described herein, logic and similar implementations can include computer programs or other control structures. Electronic circuitry, for example, can have one or more paths of electrical current constructed and arranged to implement various functions as described herein. In some implementations, one or more media can be configured to bear a device-detectable implementation when such media hold or transmit device detectable instructions operable to perform as described herein. In some variants, for example, implementations can include an update or modification of existing software or firmware, or of gate arrays or programmable hardware, such as by performing a reception of or a transmission of one or more instructions in relation to one or more operations described herein. Alternatively or additionally, in some variants, an implementation can include special-purpose hardware, software, firmware components, and/or general-purpose components executing or otherwise invoking special-purpose components. Specifications or other implementations can be transmitted by one or more instances of tangible transmission media as described herein, optionally by packet transmission or otherwise by passing through distributed media at various times.
Alternatively or additionally, implementations can include executing a special-purpose instruction sequence or invoking circuitry for enabling, triggering, coordinating, requesting, or otherwise causing one or more occurrences of virtually any functional operation described herein. In some variants, operational or other logical descriptions herein can be expressed as source code and compiled or otherwise invoked as an executable instruction sequence. In some contexts, for example, implementations can be provided, in whole or in part, by source code, such as C++, or other code sequences. In other implementations, source or other code implementation, using commercially available and/or techniques in the art, can be compiled/implemented/translated/converted into a high-level descriptor language (e.g., initially implementing described technologies in C or C++ programming language and thereafter converting the programming language implementation into a logic-synthesizable language implementation, a hardware description language implementation, a hardware design simulation implementation, and/or other such similar mode(s) of expression). For example, some or all of a logical expression (e.g., computer programming language implementation) can be manifested as a Verilog-type hardware description (e.g., via Hardware Description Language (HDL) and/or Very High Speed Integrated Circuit Hardware Descriptor Language (VHDL)) or other circuitry model which can then be used to create a physical implementation having hardware (e.g., an Application Specific Integrated Circuit).
The foregoing detailed description has set forth various embodiments of the devices and/or processes via the use of block diagrams, flowcharts, and/or examples. Insofar as such block diagrams, flowcharts, and/or examples contain one or more functions and/or operations, it will be understood that each function and/or operation within such block diagrams, flowcharts, or examples can be implemented, individually and/or collectively, by a wide range of hardware, software, firmware, or virtually any combination thereof. In an embodiment, several portions of the subject matter described herein can be implemented via Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs), digital signal processors (DSPs), or other integrated formats. However, some aspects of the embodiments disclosed herein, in whole or in part, can be equivalently implemented in integrated circuits, as one or more computer programs running on one or more computers (e.g., as one or more programs running on one or more computer systems), as one or more programs running on one or more processors (e.g., as one or more programs running on one or more microprocessors), as firmware, or as virtually any combination thereof. In addition, aspects of the subject matter described herein are capable of being distributed as a program product in a variety of forms, and an illustrative embodiment of the subject matter described herein applies regardless of the particular type of signal bearing medium used to actually carry out the distribution. Examples of a signal bearing medium include, but are not limited to, the following: a recordable type medium such as a floppy disk, a hard disk drive, a Compact Disc (CD), a Digital Video Disk (DVD), a digital tape, a computer memory, etc.; and a transmission type medium such as a digital and/or an analog communication medium (e.g., a fiber optic cable, a waveguide, a wired communications link, a wireless communication link (e.g., transmitter, receiver, transmission logic, reception logic, etc.), etc.).
In a general sense, the various aspects described herein which can be implemented, individually and/or collectively, by a wide range of hardware, software, firmware, and/or any combination thereof can be viewed as being composed of various types of “electrical circuitry.” As used herein “electrical circuitry” includes, but is not limited to, electrical circuitry having at least one discrete electrical circuit, electrical circuitry having at least one integrated circuit, electrical circuitry having at least one application specific integrated circuit, electrical circuitry forming a general purpose computing device configured by a computer program (e.g., a general purpose computer configured by a computer program which at least partially carries out processes and/or devices described herein, or a microprocessor configured by a computer program which at least partially carries out processes and/or devices described herein), electrical circuitry forming a memory device (e.g., forms of memory (e.g., random access, flash, read only, etc.)), and/or electrical circuitry forming a communications device (e.g., a modem, communications switch, optical-electrical equipment, etc.). The subject matter described herein can be implemented in an analog or digital fashion or some combination thereof.
At least a portion of the devices and/or processes described herein can be integrated into an image processing system. A typical image processing system generally includes one or more of a system unit housing, a video display device, memory such as volatile or non-volatile memory, processors such as microprocessors or digital signal processors, computational entities such as operating systems, drivers, applications programs, one or more interaction devices (e.g., a touch pad, a touch screen, an antenna, etc.), control systems including feedback loops and control motors (e.g., feedback for sensing lens position and/or velocity; control motors for moving/distorting lenses to give desired focuses). An image processing system can be implemented utilizing suitable commercially available components, such as those typically found in digital still systems and/or digital motion systems.
At least a portion of the devices and/or processes described herein can be integrated into a data processing system. A data processing system generally includes one or more of a system unit housing, a video display device, memory such as volatile or non-volatile memory, processors such as microprocessors or digital signal processors, computational entities such as operating systems, drivers, graphical user interfaces, and applications programs, one or more interaction devices (e.g., a touch pad, a touch screen, an antenna, etc.), and/or control systems including feedback loops and control motors (e.g., feedback for sensing position and/or velocity; control motors for moving and/or adjusting components and/or quantities). A data processing system can be implemented utilizing suitable commercially available components, such as those typically found in data computing/communication and/or network computing/communication systems.
The herein described subject matter sometimes illustrates different components contained within, or connected with, different other components. It is to be understood that such depicted architectures are merely exemplary, and that in fact many other architectures can be implemented which achieve the same functionality. In a conceptual sense, any arrangement of components to achieve the same functionality is effectively “associated” such that the desired functionality is achieved. Hence, any two components herein combined to achieve a particular functionality can be seen as “associated with” each other such that the desired functionality is achieved, irrespective of architectures or intermedial components. Likewise, any two components so associated can also be viewed as being “operably connected”, or “operably coupled,” to each other to achieve the desired functionality, and any two components capable of being so associated can also be viewed as being “operably couplable,” to each other to achieve the desired functionality. Specific examples of operably couplable include but are not limited to physically mateable and/or physically interacting components, and/or wirelessly interactable, and/or wirelessly interacting components, and/or logically interacting, and/or logically interactable components.
In some instances, one or more components can be referred to herein as “configured to,” “configured by,” “configurable to,” “operable/operative to,” “adapted/adaptable,” “able to,” “conformable/conformed to,” etc. Such terms (e.g. “configured to”) generally encompass active-state components and/or inactive-state components and/or standby-state components, unless context requires otherwise.
While particular aspects of the present subject matter described herein have been shown and described, it will be apparent that, based upon the teachings herein, changes and modifications can be made without departing from the subject matter described herein and its broader aspects and, therefore, the appended claims are to encompass within their scope all such changes and modifications as are within the true spirit and scope of the subject matter described herein. It will be understood that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to claims containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense of the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense of the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood that typically a disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms unless context dictates otherwise. For example, the phrase “A or B” will be typically understood to include the possibilities of “A” or “B” or “A and B.”
The herein described components (e.g., operations), devices, objects, and the discussion accompanying them are used as examples for the sake of conceptual clarity and that various configuration modifications are contemplated. Consequently, as used herein, the specific exemplars set forth and the accompanying discussion are intended to be representative of their more general classes. In general, use of any specific exemplar is intended to be representative of its class, and the non-inclusion of specific components (e.g., operations), devices, and objects should not be taken limiting.
All of the above U.S. patents, U.S. patent application publications, U.S. patent applications, foreign patents, foreign patent applications and non-patent publications referred to in this specification and/or listed in any Application Data Sheet, are incorporated herein by reference, to the extent not inconsistent herewith.
While various aspects and embodiments have been disclosed herein, other aspects and embodiments will be apparent. The various aspects and embodiments disclosed herein are for purposes of illustration and are not intended to be limiting, with the true scope and spirit being indicated by the following claims.
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| Number | Date | Country | |
|---|---|---|---|
| 20140352329 A1 | Dec 2014 | US |
