This invention relates to personal cooling devices and particularly portable evaporative cooling devices.
Outdoor activities become very uncomfortable when the temperature gets too hot. Many people avoid going outdoors or limit their outdoor activities to mornings or evening when the temperature is not as high. This limits people's activities and can make it difficult to complete outdoor chores, such as mowing the grass. Misting devices are sometimes used to cooling however they produce water droplets that can dampen clothes and fog up glasses.
The invention is directed to a personal cooling device that produces a flow of cool air through evaporative cooling. The personal cooling device utilizes a portable container for retaining a liquid that is wicked into a wicking material and a fan to draw air into the container through a plurality of apertures to produce a flow of cool air. Air drawn into the container through the apertures flows through the wicking material and is cooled by evaporative cooling. The air then flows out of the top of the container and through the air moving device. A funnel is configured around the outer perimeter of the container to capture any liquid that spills out of the apertures and direct it back into the container. A battery pack may be coupled to the air moving, device by an extension cable for storing the battery pack in a more convenient location, such as on a belt. A person may strap the personal cooling device around their neck, onto a backpack, or onto a shoulder harness to go about their outdoor activities while being cooled by a flow of cool air. The personal cooling device of the present invention greatly increase a person's comfort while doing outdoor actives in hot conditions.
The container of the personal cooling device is portable and can be carried easily in a person's hand. The container may be any shape, but preferably has a rounded or circular outer perimeter, as the container may be strapped around a person's neck. Sharp edges may be uncomfortable and would make sealing of, the funnel more difficult. The container may have a changing cross-length dimension or diameter along the length. Put another way, the container may be hour-glass shaped or may have a more abrupt change in diameter, or a step to prevent the funnel from sliding up too high, or too low along the length. The container has a length from a bottom to the top of the container. The length may be no more than about 20 inches, no more than about 15 inches, no more than about 12 inches, no more than about 9 inches and any range between and including the length values provided. Likewise, the container may have a diameter, or cross-length dimension that is no more than about 10 inches, no more than about 8 inches, no more than about 6 inches and any range between and including the cross-length dimensions or diameters provided. The container is to be portable and have dimensions to allow it to be grasped around the length by a person with one hand, like a bottom of soda, for example. The volume of the container may be no more than about 2 liters, no more than about 1.5 liters, no more than about 1.0 liter, no more than about 0.8 liter and any range between and including the volumes provided. Again, if the container is going to be donned around a person's neck, a container that is too large is not practical. Water is heavy and carrying more than about a liter may become uncomfortable. The container may be made out of any suitable material but is preferably made out of a lightweight material, such as plastic or a thin wall metal. It could also be made out of glass but this is not preferred.
In an exemplary embodiment, the container is curved to prevent spilling when the personal cooling device is tilted, such as when worn by a bicyclist. The reservoir portion of the container may extend along an axis that is at an offset angle from the cooling portion or the axis of the top opening of the container. The container may have a gradual curve or may have one or more bends. An axis extending perpendicularly through the bottom may be at an offset angle to an axis extending perpendicularly through the cooling portion of the container and this offset angle may be 20 degrees or more, 30 degrees or more, 45 degree or more, 60 degrees or more an any angle between and including the offset angles provided.
The container has a plurality of apertures to allow air to be drawn in by the air moving device. The apertures are configured proximal to the top of the container, such as at least 50% of the length up from the bottom, at least 70% of the length up from the bottom, at least 80% of the length up from the bottom, at least 90% of the length up from the bottom and any range between, and including the percentages of the length up from the bottom provided. The apertures may be any shape including but not limited to oval, circular, polygonal, irregular and the like. The apertures may be configured substantially around the entire perimeter of the container, wherein there is at least one aperture every 90 degrees around the perimeter of the container. In an exemplary embodiment, there is at least one aperture every 60 degrees, or every 45 degrees, or every 30 degrees or every 20 degrees around the perimeter of the container. The greater the total open area of the apertures, the less resistance there is for flow. In addition, when the apertures are configured around the perimeter, there is more flow through the wicking material and therefore more evaporative cooling. One or more, and in some embodiments, all of the apertures, have an, opening dimension, such as length, width, or diameter, of at least 2 mm, at least 4 mm, at least 6 mm, at least 8 mm and any range between and including the aperture dimensions provided. If the size of the apertures is too small, it may put too much strain on the air moving device or produce too much resistance to airflow.
The funnel is configured to wrap around the perimeter of the container and have, an extended end that is elevated from the contacting portion, or where the funnel is in contact with the container. The funnel may be rigid and integral to the container or may be soft, flexible and/or elastic material that can be deformed and will elastically return to an original shape, such as a foam or an elastomeric material including, but not limited to urethan, silicone, rubber and the like. It is preferred that the funnel be a soft material so that it is not uncomfortable when it is jostling around a person neck and resting against their chest. A funnel has a width, or the length of the funnel from the contacting portion to the extended end that is about 10 mm or more, about 15 mm or more, about 2511117) or more, about 35 mm or more, about 40 mm or more and any range between and including, the widths provided. The funnel may comprise a lower portion that extends from a lower contacting portion, that extends around the outer perimeter of the container to an extended end. The funnel may be open to receive liquid that is funneled by the lower funnel portion into the container through the plurality of apertures in the container. A funnel may have an open top, and an open space between the extended end and the container to receive fluid. A funnel may further comprise an upper portion that extends from the extended end to an upper contacting portion, to form a funnel enclosure. The upper contacting portion may extend around the outer perimeter of the container above the plurality of apertures in the container and the lower contacting portion may extend around the outer perimeter of the container below the plurality of apertures in the container, thereby enclosing the plurality of apertures in the container. The upper portion of the funnel may have one or more funnel apertures for receiving a flow of air into the funnel that subsequently flows through the plurality of container apertures and into the container. The funnel may have apertures configured in one portion of the perimeter of the funnel, such as only on one side, or in one quarter of the radius around the funnel, or may be configured substantially around the perimeter of the funnel or container, wherein there is at least one funnel aperture in a 90 degree span around the perimeter of the container.
The air moving device may be a fan, or pump or any other suitable air moving device that can be effectively configured into a portable size for coupling to the container. The air moving device may be configured to detachably attach to the container. The container may comprise a threaded top that is used to couple with the air moving device. In another embodiment, the container has interference ring, such as an O-ring protrusion, that requires the air moving device to be pressed to extend over the interference ring to secure the air moving device to the container. Any suitable detachably attachable connection of the air moving device to the container may be employed. The container or air moving device may comprise a flexible portion that allows the air moving device to be moved relative to the container to allow directing the flow of cool air in a desired direction. For example, an exemplary container may have a corrugated portion, proximal to the top and where the air moving device couples to the container. Likewise, the air moving device may comprise a corrugated extension that couples with the container. A corrugated portion may allow directing the axis of flow of cool air at an offset angle to the length axis of the cooling portion of the container.
A wicking material is configured inside of the container and extends over the apertures and down into the container, such as all the way to the bottom or proximal to the bottom. It is desired that the wicking material be capable of wicking all, or substantially all of the liquid up to the apertures. The wicking material may be configured in a ring and extend around the interior perimeter or along the inside wall of the container. The wicking material may be configured in a ring over the apertures but may fill or substantially fill the volume of the container below the apertures. If the wicking material is too thick in the area of the apertures, it may create too much or an increase resistance for the air moving device. However, it may be desirable to fill or mostly fill the volume of the container below the apertures to prevent splashing of the liquid retained therein. The wicking material may be any suitable wicking material such as a natural fiber type wicking material, including a cellulosic wicking material, or a synthetic wicking material and the like.
The air moving device may be powered by a battery pack that is coupled to the air moving device or to the container, or is attached to the air moving device by an extension cable. It may be desirable to keep the weight of the personal cooling device to a minimum, since it may be hung around a person's neck, and therefore a remote battery that is coupled by an extension cable may be preferred. In an exemplary embodiment, a person may place the battery pack in their pocket, attach it to their belt or backpack and extend the extension cable to the air moving device.
The summary of the invention is provided as a general introduction to some of the embodiments of the invention, and is not intended to be limiting. Additional example embodiments including variations and alternative configurations of the invention are provided herein.
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the principles of the invention.
Corresponding reference characters indicate corresponding parts throughout the several views of the figures. The figures represent an illustration of some of the embodiments of the present invention and are not to be construed as limiting the scope of the invention in any manner. Further, the figures are not necessarily to scale, some features may be exaggerated to show details of particular components. Therefore, specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a representative basis for teaching one skilled in the art to variously employ the present invention.
As used herein, the terms “comprises,” “comprising,” “includes,” “including,” “has,” “having” or any other variation thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also, use of “a” or “an” are employed to describe elements and components described herein. This is done merely for convenience and to give a general sense of the scope of the invention. This description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is meant otherwise.
Certain exemplary embodiments of the present invention are described herein and are illustrated in the accompanying figures. The embodiments described are only for purposes of illustrating the present invention and should not be interpreted as limiting the scope of the invention. Other embodiments of the invention, and certain modifications, combinations and improvements of the described embodiments, will occur to those skilled in, the art and all such alternate embodiments, combinations, modifications, improvements are within the scope of the present invention.
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A battery pack 18, or 18′ is configured to provide an electrical power supply to the air moving device. A battery pack 18′ is configured at the bottom 22 of the container and a separate battery pack 18 is coupled to the air moving device by an extension cable 84 having extension couplings 85, 85′. The wicking material 13 extends down from the apertures into the volume 26 of the container. The wicking material preferably extends down to the bottom of the interior volume of the container to enable all the liquid to be wicked up into the wicking material. The air moving device is attached to the top 20 of container by an attachment feature and may be detachably attachable. Air is drawn into the container by the air moving device 17, through the plurality of apertures 14. The air flowing through the wicking material is cooled by evaporative cooling and then travels out of the top opening 23 in the container and through the air moving device to produce a flow of cool air 60.
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It will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention without departing from the spirit or scope of the invention. Specific embodiments, features and elements described herein may be modified, and/or combined in any suitable manner. Thus, it is intended that the present invention cover the modifications, combinations and variations of this invention provided they come within the scope of the appended claims and their equivalents.
This application claims the benefit of priority to U.S. provisional patent application No. 62/432,681, filed on Dec. 11, 2016; the entirety of which is hereby incorporated by reference herein.
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Number | Date | Country | |
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62432681 | Dec 2016 | US |