CROSS-REFERENCE TO RELATED APPLICATION
This non-provisional application claims priority under 35 U.S.C. § 119(a) to Patent Application No. 109105376 filed in Taiwan, R.O.C. on Feb. 19, 2020, the entire contents of which are hereby incorporated by reference.
BACKGROUND
Technical Field
The present disclosure relates to a miniature gas detection and purification device. In particular, to a miniature gas detection and purification device for being carried by a user.
Related Art
At present, people pay more and more attention to monitoring ambient air quality in daily life, such as monitoring carbon monoxide, carbon dioxide, volatile organic compounds (VOC), PM2.5, etc. Moreover, even exposure to these gases can cause adverse health effects on the human body, and can even be life-threatening. Therefore, the quality of ambient air has attracted the attention of various countries. How to implement the monitoring of the quality of ambient air to prevent exposing to hazardous gases becomes a topic that is to be paid attention to.
For the question of how to confirm air quality, it is understood that, it is feasible to use sensors to monitor the ambient gas. Moreover, if the detection information can be provided timely to warm people in a dangerous environment, so they can avoid or escape in time from the health affecting effects and/or injuries caused by the exposure to the ambient gas, then using the sensors to monitor the surrounding environment will be a very good way. The gas purification device is a solution for preventing people from inhaling hazardous gases. Therefore, the gas purification device is combined with the gas sensor, such that the user can use the device to detect the air quality anytime and anywhere and to purify the air nearby the user, thus being a main topic to be developed.
SUMMARY
One object of the present disclosure is providing a gas detection and purification device capable of being carried by a user. The device includes a body, a purification module, a gas-guiding unit, and a gas detection module. The gas detection module detects the gas nearby the user to obtain a gas detection data so as to control the gas-guiding unit to perform operation, thereby guiding the gas nearby the user to enter into the body, to pass through the purification module for being filtered and purified to become a purified gas, and to discharge the purified out of the device to the region nearby the user.
A general embodiment of the present disclosure provides a gas detection and purification device including a body, a purification module, a gas-guiding unit, and a gas detection module. The body has at least one gas inlet, at least one gas outlet, a detection inlet, and a detection outlet. A gas channel is disposed between the at least one gas inlet and the at least one gas outlet. The purification module is disposed in the gas channel of the body. The gas-guiding unit is disposed in the gas channel of the body and is adjacently disposed at one side of the purification module. The gas-guiding unit guides the gas into the gas detection and purification device from the at least one gas inlet, guides the gas to pass through the purification module for performing filtering and purifying, and discharges the gas out of the gas detection and purification device from the at least one gas outlet. The gas detection module is disposed in the body and corresponds to the detection inlet and the detection outlet. The gas detection module is provided for detecting a gas to obtain gas detection data and for transmitting the gas detection data out. The operation of the gas-guiding unit is controlled by the gas detection data detected by the gas detection module, so that the gas-guiding unit guides the gas into the gas detection and purification device from the at least one gas inlet, to pass through the purification module for performing filtering and purifying to become a purified gas, and to discharge the purified gas out of the gas detection and purification device from the at least one gas outlet, by which the purified gas is capable of being provided to a region.
BRIEF DESCRIPTION OF THE DRAWINGS
The disclosure will become more fully understood from the detailed description given herein below for illustration only, and thus not limitative of the disclosure, wherein:
FIG. 1 illustrates a schematic perspective view of a miniature gas detection and purification device according to an exemplary embodiment of the present disclosure:
FIG. 2A illustrates a cross-sectional view of a purification module of a miniature gas detection and purification device according to a first embodiment of the present disclosure:
FIG. 2B illustrates a cross-sectional view of a purification module of a miniature gas detection and purification device according to a second embodiment of the present disclosure:
FIG. 2C illustrates a cross-sectional view of a purification module of a miniature gas detection and purification device according to a third embodiment of the present disclosure:
FIG. 2D illustrates a cross-sectional view of a purification module of a miniature gas detection and purification device according to a fourth embodiment of the present disclosure:
FIG. 2E illustrates a cross-sectional view of a purification module of a miniature gas detection and purification device according to a fifth embodiment of the present disclosure;
FIG. 3A illustrates a front exploded view of an actuation pump and related components of the miniature gas detection and purification device according to the exemplary embodiment of the present disclosure:
FIG. 3B illustrates a rear exploded view of the actuation pump and the related components of the miniature gas detection and purification device according to the exemplary embodiment of the present disclosure:
FIG. 4A illustrates a cross-sectional view of the actuation pump of the miniature gas detection and purification device according to the exemplary embodiment of the instant disclosure:
FIG. 4B illustrates a cross-sectional view of the actuation pump of the miniature gas detection and purification device according to another exemplary embodiment of the present disclosure:
FIG. 4C to FIG. 4E illustrate schematic cross-sectional views showing the actuation pump of the miniature gas detection and purification device shown in FIG. 4A at different operation steps:
FIG. 5A illustrates a schematic perspective view of a gas detection main body according to the exemplary embodiment of the present disclosure:
FIG. 5B illustrates a schematic perspective view of the gas detection main body according to the exemplary embodiment of the present disclosure, from another perspective:
FIG. 5C illustrates an exploded view of the gas detection main body according to the exemplary embodiment of the present disclosure:
FIG. 5D illustrates related components of a gas detection module according to the exemplary embodiment of the present disclosure;
FIG. 6A illustrates a schematic perspective view of the base of the gas detection main body according to the exemplary embodiment of the present disclosure:
FIG. 6B illustrates a schematic perspective view of the base of the gas detection main body according to the exemplary embodiment of the present disclosure, from another perspective:
FIG. 7 illustrates a schematic perspective view showing that the laser component and the particulate sensor are received in the base of the gad detection main body according to the exemplary embodiment of the present disclosure:
FIG. 8A illustrates an exploded view showing that the piezoelectric actuation member is to be assembled with the base according to the exemplary embodiment of the present disclosure:
FIG. 8B illustrates a schematic perspective view showing that the piezoelectric actuation member is assembled with the base according to the exemplary embodiment of the present disclosure:
FIG. 9A illustrates an exploded view of the piezoelectric actuation member according to the exemplary embodiment of the present disclosure:
FIG. 9B illustrates an exploded view of the piezoelectric actuation member according to the exemplary embodiment of the present disclosure, from another perspective:
FIG. 10A illustrates a schematic cross-sectional view showing that the piezoelectric actuation member is assembled with the gas-guiding component loading region according to the exemplary embodiment of the present disclosure;
FIG. 10B and FIG. 10C illustrate schematic cross-sectional views showing the piezoelectric actuation member shown in FIG. 10A at different operation steps:
FIG. 11A to FIG. 11C illustrate schematic cross-sectional views showing the gas paths of the gas detection main body according to the exemplary embodiment of the present disclosure;
FIG. 12 illustrates a schematic cross-sectional view showing the laser beams emitted by the laser component of the gas detection main body according to the exemplary embodiment of the present disclosure; and
FIG. 13 illustrates a block diagram showing the relationships between the control circuit board and other components of the miniature gas detection and purification device according to the exemplary embodiment of the present disclosure.
DETAILED DESCRIPTION
The present disclosure will now be described more specifically with reference to the following embodiments. It is to be noted that the following descriptions of different embodiments of this disclosure are presented herein for purpose of illustration and description only, and it is not intended to limit the scope of the present disclosure.
Please refer to FIG. 1 and FIG. 2A. A miniature gas detection and purification device is provided and portable for a user to carry it. The miniature gas detection and purification device includes a body 1, a purification module 2, a gas-guiding unit 3, and a gas detection module 4. In designing the overall structure of the device, the issues about whether the size of the device is suitable for being carried with or held by hands as well as the convenience in portability of the device are also considered. Therefore, in this embodiment, the length L, the width W, the height H, and the weight of the body 1 are considered. In a preferred embodiment, the length L of the body 1 is in a range between 60 mm (millimeter) and 120 mm, the width W of the body a is in a range between 30 mm and 90 mm, the height H of the body 1 is in a range between 23 mm and 67 mm, and the weight of the body 1 is in a range between 150 g (gram) and 300 g. Alternatively, in another preferred embodiment, the length L of the body 1 is in a range between 80 mm and 100 mm, the width W of the body 1 is in a range between 60 mm and 70 mm, the height H of the body 1 is in a range between 35 mm and 55 mm, and the weight of the body 1 is in a range between 100 g and 200 g. Alternatively, in a best embodiment, the length L of the body 1 is 90 mm, the width W of the body 1 is 60 mm, the height H of the body 1 is 45 mm, and the weight of the body 1 is equal to or less than 300 g. According to one or some embodiment of the present disclosure, the size and weight arrangement of the miniature gas detection and purification device allows the user to carry the device properly and conveniently.
As shown in FIG. 1 and FIG. 2A, the body 1 has at least one gas inlet 11, least one gas outlet 12, and a gas channel 13, the gas channel 13 is disposed between the gas inlet 11 and the gas outlet 12. The body 1 has a detection inlet 14, a detection outlet 15, and a buckling portion 16. The buckling portion may be buckled with a belt (not shown), so that the body 1 can be buckled with the belt, thus allowing the user to wear and carry the device.
Furthermore, as shown in FIG. 2A, the purification module 2 is disposed in the gas channel 13 so as to filter a gas guided into the gas channel 13. The gas-guiding unit 3 is disposed in the gas channel 13 and is adjacently disposed at one side of the purification module 2. The gas-guiding unit 3 guides the gas into the device from the gas inlet 11, guides the gas to pass through the purification module 2 for performing filtering and purifying to become a purified gas, and discharges the purified gas out of the device from the gas outlet 12.
Further, as shown in FIG. 2A to FIG. 2E, the purification module 2 is disposed in the gas channel 13, and the purification module 2 may have several embodiments. For example, as shown in FIG. 2A, a first embodiment of the purification module 2 is illustrated. In this embodiment, the purification module 2 is a filtering unit and includes a filter 2a when the gas is controlled and guided into the gas channel 13 by the gas-guiding unit 3, the chemical smog, bacteria, dusts, particles, and pollens in the gas are absorbed by the filter 2a, so that the purification module 2 provides a filtering and purifying function for the gas guiding therethrough. The filter 2a may be one of an electrostatic filter, an activated carbon filter, and a high-efficiency particulate air (HEPA) filter. Furthermore, in some embodiments, a purifying factor layer having chlorine dioxide (e.g., AMS) is coated on the filter 2a for suppressing viruses and bacteria in the gas. Accordingly, the suppression rate for influenza A virus, influenza B virus, Enterovirus, and Norovirus exceeds 99%, thereby allowing the reduction of the cross infections of the viruses. In some other embodiments, a herbal protection coating layer consisting of Rhus chinensis Mill extracts from Japan and Ginkgo biloba extracts may be coated on the filter 2a to form a herbal protection anti-allergy filter. Hence, the herbal protection anti-allergy filter can efficiently perform anti-allergy function and destroy cell surface proteins of influenza viruses (e.g., influenza virus subtype HIN1) passing through the herbal protection anti-allergy filter. In some other embodiments, a layer of silver ions may be coated on the filter 2a for suppressing viruses and bacteria in the gas.
As shown in FIG. 2B, a second embodiment of the purification module 2 is illustrated. In this embodiment, the purification module 2 may be a photocatalyst unit. The photocatalyst unit includes a photocatalyst 2b and an ultraviolet light 2c. The photocatalyst 2b and the ultraviolet light 2c are respectively disposed in the gas channel 13 by a spacing. The gas is guided into the gas channel 13 by the control of the gas-guiding unit 3, and the photocatalyst 2b is excited under illumination of the ultraviolet light 2c to convert the luminous energy into chemical energy, thereby degrading hazardous gases in the gas and sterilizing the gas. Accordingly, the gas guided into the miniature gas detection and purification device is filtered and purified by the purification module 2. It is understood that, in the embodiment that the purification module 2 is a photocatalyst unit, a filter 2a may be further disposed in the gas channel 13, thereby enhancing the gas purification effect. The filter 2a may be an electrostatic filter, an activated carbon filter, and a high-efficiency particulate air (HEPA) filter.
As shown in FIG. 2C, a third embodiment of the purification module 2 is illustrated. In this embodiment, the purification module 2 may be a photo plasma unit. The photo plasma unit includes a nanometer optical tube 2d, and the nanometer optical tube 2d is disposed in the gas channel 13. When the gas is guided into the gas channel 13 by the control of the gas-guiding unit 3, the gas is illuminated by the light of the nanometer optical tube 2d, so that the oxygen molecules and water molecules are degraded to form high oxidative photo plasma, thereby forming a plasma stream capable of destroying organic molecules. Accordingly, volatile organic compounds such as formaldehyde and toluene in the gas can be degraded into water and carbon dioxide. Thus, the gas guided into the miniature gas detection and purification device can be filtered and purified by the purification module 2. It is understood that, in the embodiment that the purification module 2 is a photo plasma unit, a filter 2a may be further disposed in the gas channel 13, thereby enhancing the gas purification effect. The filter 2a may be an electrostatic filter, an activated carbon filter, and a high-efficiency particulate air (HEPA) filter.
As shown in FIG. 2D, a fourth embodiment of the purification module 2 is illustrated. In this embodiment, the purification module 2 may be a negative ion unit. The negative ion unit includes at least one electrode wire 2e, at least one dust-collecting plate 2f, and a boost power supply 2g. The electrode wire 2e and the dust-collecting plate 2f are disposed in the gas channel 13. The boost power supply 2g provides the electrode wire 2e with high voltage electricity. The dust-collecting plate 2f has negative ions thereon. Therefore, upon the gas is guided into the gas channel 13 by the control of the gas-guiding unit 3, the electrode wire 2e discharges electricity under a high voltage, so that particulates having positive ions in the gas are adhered on the dust-collecting plate 2f having negative ions. Accordingly, the gas guided into the miniature gas detection and purification device is filtered and purified by the purification module 2. It is understood that, in the embodiment that the purification module 2 is a negative ion unit, a filter 2a may be further disposed in the gas channel 13, thereby enhancing the gas purification effect. The filter 2a may be an electrostatic filter, an activated carbon filter, and a high-efficiency particulate air (HEPA) filter.
As shown in FIG. 2E, a fifth embodiment of the purification module 2 is illustrated. In this embodiment, the purification module 2 may be a plasma unit. The plasma unit includes an electric-field upper protection mesh 2h, an absorbing mesh 2i, a high-voltage discharge electrode 2j, an electric-field lower protection mesh 2k, and a boost power supply 2g. The electric-field upper protection mesh 2h, the absorbing mesh 2i, and the electric-field lower protection mesh 2k are disposed in the gas channel 13, and the absorbing mesh 2i and the high-voltage discharge electrode 2j are located between the electric-field upper protection mesh 2h and the electric-field lower protection mesh 2k. The boost power supply 2g provides the high-voltage discharge electrode 2j with a high voltage so as to generate a high-voltage plasma column carrying plasma ions. Therefore, when the gas is guided into the gas channel 13 by the control of the gas-guiding unit 3, the oxygen molecules and the water molecules in the gas are ionized to form cations (H+) and anions (O2−). After substances which are among the ions and attached by water molecules are attached on the surfaces of viruses and the surfaces of bacteria, the water molecules are converted into oxidative oxygen ions (hydroxyl ions, OH− ions), and the oxidative oxygen ions take away the hydrogen ions of the proteins on the surfaces of the viruses and the bacteria to degrade the viruses and the bacteria. Accordingly, the gas guided into the miniature gas detection and purification device is filtered and purified by the purification module 2. It is understood that, in the embodiment that the purification module 2 is a plasma ion unit, a filter 2a may be further disposed in the gas channel 13, thereby enhancing the gas purification effect. The filter 2a may be an electrostatic filter, an activated carbon filter, and a high-efficiency particulate air (HEPA) filter.
In the present disclosure, the gas-guiding unit 3 may be a fan, for example, may be a vortex fan, a centrifugal fan, or the like. Alternatively, as shown in FIG. 3A, FIG. 3B, FIG. 4A, and FIG. 4B, the gas-guiding unit 3 may be an actuation pump 30. The actuation pump 30 may be a miniaturized pump and sequentially stacked by an inlet plate 301, a resonance sheet 302, a piezoelectric actuator 303, a first insulation sheet 304, a conductive sheet 305, and a second insulation sheet 306. The inlet plate 301 has at least one inlet hole 301a, at least one convergence channel 301b, and a convergence chamber 301c. The inlet hole 301a is used to guide the gas outside the actuation pump 30 to flow therein. The inlet hole 301a correspondingly penetrates the convergence channel 301b, and the convergence channel 301b is converged at the convergence chamber 301c, so that the gas guided from the inlet hole 301a can be converged at the convergence chamber 301c. In this embodiment, the number of the inlet holes 301a and the number of the convergence channels 301b are the same. Moreover, in this embodiment, the number of the inlet holes 301a and the number of the convergence channels 301b are respectively four, but not limited thereto. The four inlet holes 301a respectively penetrate the four convergence channels 301b, and the four convergence channels 301b are converged at the convergence chamber 301c.
Please refer to FIG. 3A, FIG. 3B, and FIG. 4A. The resonance sheet 302 may be assembled on the inlet plate 301 by attaching. Furthermore, the resonance sheet 302 has a perforation 302a, a movable portion 302b, and a fixed portion 302c. The perforation 302a is located at a center portion of the resonance sheet 302 and corresponds to the convergence chamber 301c of the inlet plate 301. The movable portion 302b is disposed at a periphery of the perforation 302a and is disposed at a portion opposite to the convergence chamber 301c. The fixed portion 302c is disposed at an outer periphery of the resonance sheet 302 and attached to the inlet plate 301.
Please still refer to FIG. 3A, FIG. 3B, and FIG. 4A. The piezoelectric actuator 303 includes a suspension plate 303a, an outer frame 303b, at least one supporting element 303c, a piezoelectric element 303d, at least one gap 303e, and a protruding portion 303f. In the embodiments of the present disclosure, the suspension plate 303a is in square shape. It is understood that, the reason why the suspension plate 303a adopts the square shape is that, comparing with a circle suspension plate having a diameter equal to the side length of the square suspension plate 303a, the square suspension plate 303a has an advantage of saving electricity. The power consumption of a capacitive load operated at a resonance frequency may increase as the resonance frequency increases, and since the resonance frequency of a square suspension plate 303a is much lower than that of a circular suspension plate, the power consumption of the square suspension plate 303a is relatively low as well. Consequently, the square design of the suspension plate 303a used in one or some embodiments of the present disclosure has the benefit of power saving. In the embodiments of the present disclosure, the outer frame 303b is disposed around the periphery of the suspension plate 303a. The at least one supporting element 303c is connected between the suspension plate 303a and the outer frame 303b to provide a flexible support for the suspension plate 303a. In the embodiments of the present disclosure, the piezoelectric element 303d has a side length, which is shorter than or equal to a side length of the suspension plate 303a. The piezoelectric element 303d is attached to a surface of the suspension plate 303a so as to drive the suspension plate 303a to bend and vibrate when the piezoelectric element 303d is applied with a voltage. The at least one gap 303e is formed among the suspension plate 303a, the outer frame 303b, and the at least one connecting element 303c, and the at least one gap 303e is provided for the gas to flow therethrough. The protruding portion 303f is disposed on a surface of the suspension plate 303a opposite to the surface of the suspension plate 303a where the piezoelectric element 303d is attached. In this embodiment, the protruding portion 303f may be a convex structure protruding out from and integrally formed with the surface of the suspension plate 303a opposite to the surface of the suspension plate 303a where the piezoelectric element 303d is attached by performing an etching process on the suspension plate 303a.
Please still refer to FIG. 3A, FIG. 3B, and FIG. 4A. The inlet plate 301, the resonance plate 302, the piezoelectric actuator 303, the first insulation plate 304, the conductive plate 305, and the second insulation plate 306 are sequentially stacked and assembled. A chamber space 307 needs to be formed between the suspension plate 303a and the resonance plate 302. The chamber space 307 can be formed by filling a material between the resonance plate 302 and the outer frame 303b of the piezoelectric actuator 303, such as conductive adhesive, but not limited thereto. By filling a material between the resonance plate 302 and the suspension plate 303a, a certain distance can be maintained between the resonance plate 302 and the suspension plate 303a to form the chamber space 307, by which the gas can be guided to flow more quickly. Further, since an appropriate distance is maintained between the suspension plate 303a and the resonance plate 302, the interference raised by the contact between the suspension plate 303a and the resonance plate 302 can be reduced, so that the generation of noise can be decreased as well. In other embodiments, the needed thickness of the conductive adhesive between the resonance plate 302 and the outer frame 303b of the piezoelectric actuator 303 can be decreased by increasing the height of the outer frame 303b of the piezoelectric actuator 303. Accordingly, during the forming process at the hot pressing temperature and the cooling temperature, the situation that the actual spacing of the chamber space 307 being affected by the thermal expansion and contraction of the conductive adhesive can be avoided, thereby decreasing the indirect effect of the hot pressing temperature and the cooling temperature of the conductive adhesive on the entire structure of the actuation pump 30. Moreover, the height of the chamber space 307 also affects the transmission efficiency of the actuation pump 30. Therefore, it is important that a fixed height of the chamber space 307 should be maintained for the purpose of achieving stable transmission efficiency with the actuation pump 30.
Therefore, as shown in FIG. 4B, in other embodiments of the piezoelectric actuator, the suspension plate 303a can be extended out by a certain distance by stamping. The extension distance can be adjusted by at least one supporting element 303c between the suspension plate 303a and the outer frame 303b so as to make the surface of the protruding portion 303f on the suspension plate 303a be not coplanar with the surface of the outer frame 303b. A few amount of filling material (such as the conductive adhesive) is applied on the assembly surface of the outer frame 303b, and the piezoelectric actuator 303 is assembled to the resonance plate 302 by attaching the piezoelectric actuator 303 onto the fixed portion 302c of the resonance plate 302 through hot pressing.
By stamping the suspension plate 303a of the piezoelectric actuator 303 to form the chamber space 307, the chamber space 307 can be obtained by directly adjusting the extension distance of the suspension plate 303a of the piezoelectric actuator 303, which effectively simplifies the structural design of the chamber space 307, and also simplifies the manufacturing process and shortens the manufacturing time of the chamber space 307.
Moreover, the first insulation plate 304, the conductive plate 305, and the second insulation plate 306 are all thin sheets with a frame like structure, and the first insulation plate 304, the conductive plate 305, and the second insulation plate 306 are sequentially stacked and assembled on the piezoelectric actuator 303 to form the main structure of the actuation pump 30.
In order to understand the operation steps of the aforementioned actuation pump 30 in transmitting gas, please refer to FIG. 4C to FIG. 4E. Please refer to FIG. 4C first, the piezoelectric element 303d of the piezoelectric actuator 303 deforms after being applied with a driving voltage, and the piezoelectric element 303d drives the suspension plate 303a to move downwardly and to move away from the inlet plate 301. Thus, the volume of the chamber space 307 is increased and a negative pressure is generated inside the chamber space 307, thereby drawing the gas in the convergence chamber 301c into the chamber space 307. At the same time, owing to the resonance effect, the resonance sheet 302 moves downwardly is bent downwardly and away from the inlet plate 301 correspondingly, which also increases the volume of the convergence chamber 301c. Furthermore, since the gas inside the convergence chamber 301c is drawn into the chamber space 307, the convergence chamber 301c is in a negative pressure state as well. Therefore, the gas can be drawn into the convergence chamber 301c through the inlet hole 301a and the convergence channel 301b. Then, please refer to FIG. 4D. The piezoelectric element 303d drives the suspension plate 303a to move upwardly to move toward the inlet plate 301, thereby compressing the chamber space 307. Similarly, since the resonance sheet 302 resonates with the suspension plate 303a, the resonance sheet 302 also moves upwardly and moves toward the inlet plate 301, thereby pushing the gas in the chamber space 307 to be transmitted out of the actuation pump 30 through the at least one gap 303e so as to achieve gas transmission. Last, please refer to FIG. 4E. When the suspension plate 303a moves resiliently to its original position, the resonance sheet 302 still moves downwardly and moves away from the inlet plate 301 due to its inertia momentum. At the time, the resonance sheet 302 compresses the chamber space 307, so that the gas in the chamber space 307 is moved toward the gap 303e and the volume of the convergence chamber 301c is increased. Accordingly, the gas can be drawn into the convergence chamber 301c continuously through the inlet holes 301a and the convergence channels 301b and can be converged at the convergence chamber 301c. By continuously repeating the operation steps of the actuation pump 30 shown in FIG. 4C to FIG. 4E, the actuation pump 30 can make the gas continuously enter into the flow paths formed by the inlet plate 301 and the resonance sheet 302 from the inlet holes 301a, thereby generating a pressure gradient. The gas is then transmitted outward through the gap 303e. As a result, the gas can flow at a relatively high speed, thereby achieving the effect of gas transmission of the actuation pump 30.
The actuation pump 30 may be replaced by a piezoelectric actuation member 42 in a miniaturized blower type. Please refer to FIG. 8A, FIG. 9A, and FIG. 9B. The piezoelectric actuation element 42 includes a nozzle plate 421, a chamber frame 422, an actuation body 423, an insulation frame 424, and a conductive frame 425. The nozzle plate 421 is made of a flexible material, and the nozzle plate 421 has a suspension sheet 4210 and a hollow hole 4211. The suspension sheet 4210 is a flexible sheet, which can bend and vibrate. The shape and the size of the suspension sheet 4210 approximately correspond to those of the inner edge of a loading region, but embodiments are not limited thereto. The shape of the suspension sheet 4210 may be one of square, circle, ellipse, triangle, and polygon. The hollow hole 4211 penetrates the center portion of the suspension sheet 4210 for allowing the gas flowing therethrough.
The chamber frame 422 is stacked on the nozzle plate 421, and the shape of the chamber frame 422 corresponds to the shape of the nozzle plate 421. The actuation body 423 is stacked on the chamber frame 422, and a resonance chamber 426 is formed among the chamber frame 422, the actuation body 423, and the suspension sheet 4210. The insulation frame 424 is stacked on the actuation body 423. The appearance of the insulation frame 424 is similar to that of the chamber frame 422. The conductive frame 425 is stacked on the insulation frame 424. The appearance of the conductive frame 425 is similar to that of the insulation frame 424. The conductive frame 425 has a conductive frame pin 4251 and a conductive electrode 4252. The conductive frame pin 425a extends outwardly from the outer edge of the conductive frame 425, and the conductive electrode 425b extends inwardly from the inner edge of the conductive frame 425. Moreover, the actuation body 423 further includes a piezoelectric carrier plate 4231, an adjusting resonance plate 4232, and a piezoelectric plate 4233. The piezoelectric carrier plate 4231 is stacked on the chamber frame 422. The adjusting resonance plate 4232 is stacked on the piezoelectric carrier plate 4231. The piezoelectric plate 4233 is stacked on the adjusting resonance plate 4232. The adjusting resonance plate 4232 and the piezoelectric plate 4233 are accommodated in the insulation frame 424. The conductive electrode 4252 of the conductive frame 425 is electrically connected to the piezoelectric plate 4233. The piezoelectric carrier plate 4231 and the adjusting resonance plate 4232 are both made of the same conductive material or different conductive materials. The piezoelectric carrier plate 4231 has a piezoelectric pin 4234. The piezoelectric pin 4234 and the conductive frame pin 4251 are used for have an electrical connection with a driving circuit (not shown) of the driving circuit board 43 so as to receive a driving signal (a driving frequency and a driving voltage). The piezoelectric pin 4234, the piezoelectric carrier plate 4231, the adjusting resonance plate 4232, the piezoelectric plate 4233, the conductive electrode 4252, the conductive frame 425, and the conductive frame pin 4251 may together form a loop, the driving signal is transmitted by the loop, and the insulation frame 424 is provided for electrically isolating the conductive frame 425 and the actuation body 423 for avoiding short circuit, by which the driving signal can be transmitted to the piezoelectric plate 4233. When the piezoelectric plate 4233 receives the driving signal (a driving frequency and a driving voltage), the piezoelectric plate 4233 deforms owing to the piezoelectric effect, and thus the piezoelectric carrier plate 4231 and the adjusting resonance plate 4232 are driven to perform reciprocating vibration correspondingly.
As mentioned above, the adjusting resonance plate 4232 is disposed between the piezoelectric plate 4233 and the piezoelectric carrier plate 4231. As a result, the adjusting resonance plate 4232 can be served as a buffering element between the piezoelectric plate 4233 and the piezoelectric carrier plate 4231, by which the vibration frequency of the piezoelectric carrier plate 4231 can be adjusted. Generally, the thickness of the adjusting resonance plate 4232 is greater than the thickness of the piezoelectric carrier plate 4231. The thickness of the adjusting resonance plate 4232 may be changed so as to adjust the vibration frequency of the actuation body 423.
Please refer to FIG. 9A, FIG. 9B, and FIG. 10A. The nozzle plate 421, the chamber frame 422, the actuation body 423, the insulation frame 424, and the conductive frame 425 are sequentially stacked and assembled with each other and are disposed in the loading region, so that the piezoelectric actuation element 42 is placed and positioned in the loading region. The bottom of the piezoelectric actuation element 42 is positioned with the loading region, so that the piezoelectric actuation element 42 has a surrounding gap 4212 between the suspension sheet 4210 and the inner edge of the loading region 415 for the gas to pass therethrough.
Please refer to FIG. 10A first. A gas flow chamber 427 is formed between a bottom of the nozzle plate 421 and the bottom surface of the loading region. The gas flow chamber 427 is in communication with, through the hollow hole 4211 of the nozzle plate 421, the resonance chamber 426 formed among the actuation body 423, the chamber frame 422, and the suspension sheet 4210. By controlling the vibration frequency of the gas in the resonance chamber 426 to be the same as the vibration frequency of the suspension sheet 4210, the resonance chamber 426 and the suspension sheet 4210 can generate the Helmholtz resonance effect so as to improve the transmission efficiency of the gas.
Please refer to FIG. 10B. When the piezoelectric plate 4233 bends toward a direction away from the bottom surface of the loading region, the suspension sheet 4210 of the nozzle plate 421 is driven by the piezoelectric plate 4233 to bend toward the direction away from the bottom surface of the loading region correspondingly. Hence, the volume of the gas flow chamber 427 expands quickly, so that the internal pressure of the gas flow chamber 427 decreases and becomes negative, thereby drawing the gas outside the piezoelectric actuation element 42 to flow into the piezoelectric actuation element 42 through the surrounding gap 4212. The gas further enters into the resonance chamber 426 through the hollow hole 4211, thereby increasing the gas pressure of the resonance chamber 426 and thus generating a pressure gradient. Further, as shown in FIG. 10C, when the piezoelectric plate 4233 drives the suspension sheet 4210 of the nozzle plate 421 to move toward the bottom surface of the loading region, the gas inside the resonance chamber 426 is pushed to flow out quickly through the hollow hole 4211 so as to further push the gas inside the gas flow chamber 427, by which the converged gas can be quickly and massively ejected and guided into the bottom through hole of the loading region in a state closing to an ideal gas state under the Benulli's law. Therefore, by repeating the steps as shown in FIG. 10B and FIG. 10C, the piezoelectric plate 4233 can bend and vibrate reciprocatingly. Further, after the gas is discharged out of the resonance chamber 426, the internal pressure of the resonance chamber 426 is lower than the equilibrium pressure due to the inertia, by which the pressure difference guides the gas outside the resonance chamber 426 into the resonance chamber 426 again. Thus, by controlling the vibration frequency of the gas inside the resonance chamber 426 to be the same as the vibration frequency of the piezoelectric plate 4233 in such way to generate the Helmholtz resonance effect, high-speed and large-volume gas transmission can be achieved.
Furthermore, as shown in FIG. 2A, FIG. 5D, and FIG. 13, the gas detection module 4 is disposed in the body 1 and corresponds to the detection inlet 14 and the detection outlet 15. Therefore, the gas detection module 4 can be provided for detecting the gas nearby the user to obtain gas detection data. The gas detection module 4 includes a control circuit board 4a, a gas detection main body 4b, a microprocessor 4c, a communication device 4d, and a power unit 4e. The power unit 4e is used to provide power for operating the gas detection main body 4b, such that the gas detection main body 4b detects the guided gas inside the body 1 so as to obtain the gas detection data, and the power unit 4e may be electrically connected to an external power device 5 through wired connection or wireless connection. Hence, the power unit 4e can be charged by the external power device 5 to store electricity. The microprocessor 4c receives the gas detection data to perform a computation processing to the gas detection data, and the microprocessor 4c controls the gas-guiding unit 3 to start or to stop operation for performing the operation of gas purification. The communication device 4d receives the gas detection data from the microprocessor 4c for transmitting the gas detection data to an external device 6, so that the external device 6 obtains information and a notification alert of the gas detection data. The power unit 4e may include a battery which can store 2000-3000 mAh, the charging time for the power unit 4e is 5 hours, and after the power unit 4e is charged, the power unit 4e allows the gas detection body operating for eight hours. The external device 6 may be a mobile device or a cloud processing device.
Further, as shown in FIG. 5A to 5C, FIG. 6A and FIG. 6B, FIG. 7, and FIG. 8A and FIG. 8B, the gas detection main body 4b includes a base 41, a piezoelectric actuation element 42, a driving circuit board 43, a laser component 44, a particulate sensor 45, and an outer cap 46. The base 41 has a first surface 411, a second surface 412, a laser configuration region 413, a gas inlet groove 414, a gas-guiding component loading region 415, and a gas outlet groove 416. The first surface 411 and the second surface 412 are opposite surfaces. The laser configuration region 413 hollowed out from the first surface 411 to the second surface 412. The gas inlet groove 414 is recessed from the second surface 412 and located adjacent to the laser configuration region 413. The gas inlet groove 414 has a gas inlet through hole 414a and two lateral walls. The gas inlet through hole 414a is in communication with outside of the base 41 and corresponds to the gas inlet opening 461a of the outer cap 46. A light permissive window 414b is opened on the lateral wall of the gas inlet groove 414 and is in communication with the laser configuration region 413. Therefore, the first surface 411 of the base 41 is covered by the outer cap 46, and the second surface 412 of the base 41 is covered by the driving circuit board 43, so that the gas inlet groove 414 and the driving circuit board 43 together define a gas inlet path (as shown in FIG. 11A).
Furthermore, as shown in FIG. 6A and FIG. 6B, the gas-guiding component loading region 415 is recessed from the second surface 412 and in communication with the gas inlet groove 414. A gas flowing hole 415a penetrates a bottom surface of the gas-guiding component loading region 415. The gas outlet groove 416 has a gas outlet through hole 416a, and the gas outlet through hole 416a corresponds to the gas outlet opening 461b of the outer cap 46. The gas outlet groove 416 includes a first region 416b and a second region 416c. The first region 416b is recessed from a portion of the first surface 411 corresponding to a vertical projection region of the gas-guiding component loading region 415. The second region 416c is at a portion extended from a portion not the vertical projection region of the gas-guiding component loading region 415, and the second region 416c is hollowed out from the first surface 411 to the second surface 412 in a region where the first surface 411 is not aligned with the gas-guiding component loading region 415. The first region 416b is connected to the second region 416c to form a stepped structure. Moreover, the first region 416b of the gas outlet groove 416 is in communication with the gas flowing hole 415a of the gas-guiding component loading region 415, and the second region 416c of the gas outlet groove 416 is in communication with the gas outlet through hole 416a. Therefore, when the first surface 411 of the base 41 is covered by the outer cap 46 and the second surface 412 of the base 41 is covered by the driving circuit board 43, the gas outlet groove 416, the base 41, and the driving circuit board 43 together define a gas outlet path (as shown in FIG. 11B and FIG. 11C).
Furthermore, as shown in FIG. 5C and FIG. 7, the laser component 44 and the particulate sensor 45 are disposed on the driving circuit board 43 and located in the base 41. Here, in order to clearly explain the positions of the laser component 44, the particulate sensor 45, and the base 41, the driving circuit board 43 is not illustrated in FIG. 7. Please refer to FIG. 5C, FIG. 6B, FIG. 7, and FIG. 12. The laser component 44 is received in the laser configuration region 413 of the base 41. The particulate sensor 45 is received in the gas inlet groove 414 of the base 41 and aligned with the laser component 44. Moreover, the laser component 44 corresponds to the light permissive window 414b. The light permissive window 414b allows the light beam emitted by the laser component 44 to pass therethrough, so that the light beam further enters into the gas inlet groove 414. The path of the light beam emitted by the laser component 44 passes through the light permissive window 414b and is orthogonal to the gas inlet groove 414. The light beam emitted by the laser component 44 enters into the gas inlet groove 414 through the light permissive window 414b, and the particulate matters in the gas in the gas inlet groove 414 is illuminated by the light beam. When the light beam encounters the particulate matters, the light beam scatters to generate light spots. Hence, the particulate sensor 45 receives and calculates the light spots generated by the scattering, such that the particulate sensor 45 obtains the particle size and the concentration of the particulate matters in the gas and other related information. The particulate matters may include viruses and bacteria. The particulate sensor 45 may be a PM2.5 sensor, and the particulate sensor 45 is capable of detecting particulate matters in PM1, PM2, and PM10 levels.
Furthermore, as shown in FIG. 8A and FIG. 8B, the piezoelectric actuation element 42 is received in the gas-guiding component loading region 415 of the base 41. The gas-guiding component loading region 415 is a square, and each of four corners of the gas-guiding component loading region 415 has a positioning bump 415b. The piezoelectric actuation element 42 is disposed in the gas-guiding component loading region 415 through the four positioning bumps 415b. Furthermore, as shown in FIG. 6A, FIG. 6B, FIG. 11B, and FIG. 11C, the gas-guiding component loading region 415 is in communication with the gas inlet groove 414. When the piezoelectric actuation element 42 operates, the gas in the gas inlet groove 414 is drawn into the piezoelectric actuation element 42, and the gas passes through the gas flowing hole 415a of the gas-guiding component loading region 415 and enters into the gas outlet groove 416.
Furthermore, as shown in FIG. 5B and FIG. 5C, the driving circuit board 43 covers the second surface 412 of the base 41. The laser component 44 is disposed on the driving circuit board 43 and electrically connected to the driving circuit board 43. The particulate sensor 45 is also disposed on the driving circuit board 43 and electrically connected to the driving circuit board 43. The outer cap 46 covers the base 41 and is attached on the first surface 411 of the base 41, and the outer cap 46 has a side plate 461. The side plate 461 has a gas inlet opening 461a and a gas outlet opening 461b. Further, as shown in FIG. 5A, when the outer cap 46 covers the base 41, the gas inlet opening 461a corresponds to the gas inlet through hole 414a of the base 41 (as shown in FIG. 11A), and the gas outlet opening 461b corresponds to the gas outlet through hole 416a of the base 41 (as shown in FIG. 11C).
The structures and the operations of the piezoelectric actuation member of the gas detection module are the same as those of the piezoelectric actuation member in a miniaturized blower type described above.
Moreover, as shown in FIG. 11A, the gas enters into the gas detection main body 4 from the gas inlet opening 461a of the outer cap 46, passes through the gas inlet through hole 414a and enters into the gas inlet groove 414 of the base 41, and flows to the particulate sensor 45. As shown in FIG. 11B, the piezoelectric actuation element 42 continuously draws the gas in the gas inlet path so as to facilitate the gas outside the gas detection main body 4b to be guided therein and to pass over the particulate sensor 45. And, the light beam emitted by the laser component 44 passes through the light permissive window 414b and enters into the gas inlet groove 414. The particulate matters in the gas in the gas inlet groove 414 passing over the particulate sensor 45 are illuminated by the light beam. When the illuminated light beam encounters the particulate matters in the gas, the light beam scatters to generate light spots. The particulate sensor 45 receives and calculates the light spots generated by the scattering, such that the particulate sensor 45 obtains the particle size and the concentration of the particulate matters in the gas and other related information. And, the gas passing over the particulate sensor 45 is continuously guided into the gas flowing hole 415a of the gas-guiding component loading region 415 by the driving of the piezoelectric actuation element 42 and enters into the first region 416b of the gas outlet groove 416. Last, as shown in FIG. 11C, after the gas enters into the first region 416b of the gas outlet groove 4166, since the piezoelectric actuation element 42 continuously delivers the gas into the first region 416b, the gas in the first region 416b is pushed toward the second region 416c, and the gas is eventually discharged out of the gas detection main body 4b through the gas outlet through hole 416a and the gas outlet opening 461b.
Please refer to FIG. 12. The base 41 further includes a light trap region 417. The light trap region 417 is formed by hollowing out the base 41 from the first surface 411 toward the second surface 412, and the light trap region 417 corresponds to the laser configuration region 413. Moreover, the light trap region 417 passes through the light permissive window 414b, such that the light beam emitted by the laser component 44 can be projected into the light trap region 417. The light trap region 417 has a light trap structure 417a having an oblique cone surface, and the light trap structure 417a corresponds to the path of the light beam emitted by the laser component 44. Moreover, the light trap structure 417a allows the light beam emitted by the laser component 44 to be reflected to the light trap region 417 by the oblique cone surface of the light trap structure 417a, thereby preventing the light beam from being reflected to the particulate sensor 45. Moreover, a light trap distance D is maintained between the light permissive window 414b and the position where the light trap structure 417a receives the light beam, thereby preventing stray light beams from being directly reflected to the particulate sensor 45 after the light beam projecting on the light trap structure 417a is reflected, and thus causing the distortion of detection accuracy.
Please refer to FIG. 5C and FIG. 12. The gas detection module 4 according to one or some embodiments of the present disclosure is not only capable of detecting the particles in the gas, but also capable of detecting the features of the gas guided therein, for example, the gas may be formaldehyde, ammonia, carbon monoxide, carbon dioxide, oxygen, ozone, and so on. Therefore, in one or some embodiments of the present disclosure, the structure of the gas detection module 4 further includes a first volatile organic compound sensor 47a. The first volatile organic compound sensor 47a is disposed on the driving circuit board 43 and electrically connected to the driving circuit board 43, and the first volatile organic compound sensor 47a is received in the gas outlet groove 416 for detecting the gas guided out of the gas outlet path, so that the first volatile organic compound sensor 47a can be provided for detecting the concentration or the features of the volatile organic compound contained in the gas guided out of the gas outlet path. Alternatively, in one or some embodiments of the present disclosure, the structure of the gas detection module 4 further includes a second volatile organic compound sensor 47b. The second volatile organic compound sensor 47b is disposed on the driving circuit board 43 and electrically connected to the driving circuit board 43. The second volatile organic compound sensor 47b is received in the light trap region 417, and the second volatile organic compound sensor 47b is provided for detecting the concentration or the features of the volatile organic compound contained in the gas passing through the gas inlet path of the gas inlet groove 414 and guided into the light trap region 417 through the light permissive window 414b.
As above, in the miniature gas detection and purification device according to one or some embodiments of the present disclosure, based on the gas detection data detected by the gas detection main body 4b of the gas detection module 4, the microprocessor 4c receives the gas detection data to perform a computation processing to the gas detection data, and the microprocessor 4c controls the gas-guiding unit 3 to perform operation of gas purification. At the same time, the communication device 4d receives the gas detection data from the microprocessor 4c and transmits the gas detection data to the external device 6, so that the external device 6 obtains information and a notification alert of the gas detection data. Moreover, through the operation of the gas-guiding unit 3, the gas nearby the user can be guided into the device from the gas inlet 11 and passes the purification module 2 for performing filtering and purifying to become a purified gas. Last, the purified gas is guided out of the device from the gas outlet 12 to a region nearby the user, and an optimized volume of the region is in a range between 25 cm×25 cm×25 cm and 35 cm×35 cm×35 cm. In other words, in this embodiment, the effective air throw distance of the purified gas provided by the gas-guiding unit 3 is in a range between 20 cm and 40 cm, namely, the effective volume of region near by the user for applying the purified gas is in a range between 20 cm×20 cm×20 cm and 40 cm×40 cm×40 cm, so that the user can breathe clean and purified gas (air). Accordingly, by carrying the miniature gas detection and purification device of one or some embodiments of the present disclosure, the user can solve the air quality issue nearby the user instantly.
Based on the above, the miniature gas detection and purification device of one or some embodiments of the present disclosure can be carried by a user. The device includes a body, a purification module, a gas-guiding unit, and a gas detection module. The gas detection module detects the gas nearby the user to obtain a gas detection data so as to control the gas-guiding unit to perform operation, thereby guiding the gas nearby the user to enter into the body, to pass through the purification module for performing filtering and purifying to become a purified gas, and the purified gas is discharged out of the device to the region nearby the user. Accordingly, the air quality issue nearby the user can be solved instantly. Thus, the industrial value of the present application is very high, so the application is submitted in accordance with the law.
The foregoing outlines features of several embodiments so that those skilled in the art may better understand the aspects of the present disclosure. Those skilled in the art should appreciate that they may readily use the present disclosure as a basis for designing or modifying other processes and structures for carrying out the same purposes and/or achieving the same advantages of the embodiments introduced herein. Those skilled in the art should also realize that such equivalent constructions do not depart from the spirit and scope of the present disclosure, and that they may make various changes, substitutions, and alterations herein without departing from the spirit and scope of the present disclosure.
Patent Grant
12025343
