COUNTERTOP RAPID COOLER FOR RAPIDLY COOLING FOOD, DRINK, AND OTHER ITEMS
A countertop rapid cooler is disclosed for rapidly cooling food, drink, and other items using at least convection cooling. the cooler includes: a thermally insulated enclosure with a door and sized to fit on a countertop; a fan; and a convective heat exchanger for cooling air blown by the fan toward an item within the enclosure. The convective heat exchanger is capable of receiving coolant from a neighboring refrigeration unit (such as a refrigerator), and returning the coolant to the neighboring unit after use. In some embodiments, expanded coolant can be delivered from the neighboring unit's expansion valve. In other embodiments, unexpanded coolant can be delivered from the neighboring unit, to be expanded by a separate expansion valve located within the countertop rapid cooler. By not including its own compressor or condenser, the countertop rapid cooler is lighter, and uses less space, than currently available rapid cooling devices.
This invention relates to cooling devices, and more particularly to rapid cooling devices.
BACKGROUNDModern day cooling devices, such as refrigerators and ice chests are used widely by consumers and in industry. Every home, for example, has a refrigerator, generally including a freezer compartment. A refrigerator or other cooling device may provide refrigeration in a camper, on a boat, or associated with other recreational uses. Among industrial users, many small businesses depend on reliable cooling to maintain the viability of the business. Food caterers, ice cream trucks, coffee shops, and other food establishments could not remain in business without the ability to chill food and/or beverages and keep them cold. Other industrial users include, for example, medical, pharmaceutical, and chemical industries.
Frequently, there is a specific need, among both domestic and industrial users of refrigeration, for rapid cooling or chilling of an item. As one example, rapid cooling is desirable for some foods, particularly food preparations containing mayonnaise. As another example, consumers often have a desire to rapidly cool bottled or canned beverages. Similarly, caterers may wish to quickly meet a customer's need for a chilled food and/or beverage item. Among medical uses, tissue samples, for example, may need to be rapidly cooled to forestall deterioration of the samples. Pharmaceutical companies and chemical supply companies sometimes have similar needs for rapid cooling of items.
Some currently available rapid chilling devices require storage in a refrigerator or use of refrigerator space, with the drawback of consuming room within the refrigerator's cooling chamber. Some other rapid chilling devices require immersing the item to be chilled in water and/or ice, which is unsuitable for items that cannot become wet. Although there are stand-alone rapid convection-based chilling devices on the market today, most currently available commercial rapid chilling devices are large, bulky and heavy.
The bulkiness, size, and heft of current commercial stand-alone rapid convection chilling devices are typically due to inclusion of a compressor and condenser with the rapid chilling device. Even in currently available rapid chilling devices that do not include an internal compressor and condenser, a compressor and condenser is typically installed along with installation of the rapid cooling device, for example, with a walk-in type refrigerator or other large capacity cooler.
Because of this need for a condenser and compressor, current rapid cooling devices typically need to be of large capacity to justify their cost. Current rapid cooling devices are often not economical (on a “per chilled item” basis) unless large. Often, this is undesirable for many potential users of such rapid cooling devices who wish to have such devices readily available in smaller spaces. Furthermore, the requirement for large size puts such rapid cooling devices financially out of reach of most home and recreational users, as well as taxing the budgets of small businesses.
SUMMARYA countertop rapid cooling device for rapidly cooling an item using at least convection cooling is claimed. The cooling device includes a fan to blow chilled air toward an item to rapidly cool the item. The cooling device is lighter and uses less space than current rapid cooling devices with comparable capacity, such as rapid cooling refrigerators, since the cooling device in embodiments of the invention does not contain a mechanical compressor and condenser. Instead, the cooling device includes a coolant input to deliver coolant to the cooling device.
In this way, a rapid cooling device is provided that can be more economical for home, recreational, small business, and even industrial users. While a compressor is heavy, bulky, and noisy, the countertop rapid cooler is able to accomplish rapid cooling without requiring a compressor incorporated into its own structure. Instead, the countertop rapid cooler is able to borrow coolant from a neighboring refrigeration unit which itself contains a compressor. Because of the lack of a need to incorporate a compressor, the countertop rapid cooler can operate as a small, lightweight, compact, relatively noiseless and low-power device, as compared with a typical refrigerator.
The coolant is received from an external store of coolant, such as a neighboring refrigerator or freezer. In some embodiments, the received coolant can be drawn from an expansion valve of the neighboring refrigerator or freezer. In some of these embodiments, the coolant flow from the expansion valve may be controlled by a coolant flow module or other feedback arrangement that can adjust, such as an electromechanical flow valve for example. In some embodiments, the flow valve can be an electrically controlled T-valve. If coolant is drawn from an expansion valve of a neighboring unit, the hose carrying the coolant from the neighboring unit to the countertop rapid cooler can be insulated, so as to not allow heat transfer between the coolant and the ambient air.
In other embodiments, the coolant can be drawn from a neighboring unit at a point before the expansion valve of the neighboring unit. Thus, the coolant would still be in an unexpanded state as it was transferred from the neighboring unit to the countertop rapid cooler. The unexpanded coolant can then travel through a pressure hose to the countertop rapid cooler, where it is then expanded via an expansion valve. The expansion valve would be located before the convective heat exchanger, and optimally within the thermal enclosure.
One general aspect of the invention is a cooling device for rapid cooling of items, wherein the cooling device includes: a thermally insulated enclosure, the enclosure having a thermally insulated door, the enclosure being sized so as to fit on a countertop, and being sized so as to enclose at least one item to be rapidly cooled; a fan located within the thermally insulated enclosure; a convective heat exchanger, the convective heat exchanger being capable of receiving coolant from a neighboring refrigeration unit and being capable of cooling air to be blown by the fan toward the item to be cooled; a coolant input, the coolant input being capable of delivering the coolant to the convective heat exchanger from the neighboring refrigeration unit; and a coolant output, the coolant output being capable of returning the coolant to the neighboring refrigeration unit from the convective heat exchanger.
In some embodiments, an inside space of the thermally insulated enclosure is of a volume that falls within a range of volumes of inside spaces of typical microwave ovens. In some embodiments the coolant input is adapted to receive expanded coolant from an expansion valve of the neighboring refrigeration unit. In some of these embodiments, the cooling device further includes at least one flow valve coupled to the coolant input and configured to enable and disable flow of coolant from the expansion valve of the neighboring refrigeration unit. In some embodiments, the coolant input is adapted to receive compressed coolant from a neighboring refrigeration unit, and wherein the coolant input includes an expansion valve for expanding the coolant, the expansion valve being located within the thermally insulated enclosure, and prior to the convective heat exchanger. In some embodiments, the convective heat exchanger is a tube-and-fin system.
In some embodiments, the cooling device further includes: a sensor capable of sensing a temperature of the item to be cooled; and a coolant flow module capable of adjusting coolant delivery to the cooling device based on the temperature sensed by the sensor. In some embodiments, the cooling device further includes: a control input capable of receiving a value corresponding to at least one of a desired temperature, and a desired cooling time, for the item to be cooled; and a coolant flow module capable of adjusting coolant delivery to the cooling device based on the at least one of the desired temperature, and the desired cooling time, of the item to be cooled.
In some embodiments, the cooling device further includes: a sensor capable of sensing a temperature of the item to be cooled; and a fan control module capable of adjusting air flow from the fan to the item to be cooled based on the temperature of the item sensed by the sensor. In some embodiments, the cooling device further includes: a control input capable of receiving a value corresponding to at least one of a desired temperature, and a desired cooling time, for the item to be cooled; and a fan control module capable of adjusting air flow from the fan to the item to be cooled based on the at least one of the desired temperature, and the desired cooling time, of the item to be cooled.
In some embodiments: the neighboring refrigeration unit includes a compressor and a coolant line; and the coolant input is coupled to the expansion valve via a coolant line tap downstream of the expansion valve, the cooling device further including a signal line configured to transmit control signals to the neighboring refrigeration unit, the control signals for controlling compressor activation. In some embodiments: the neighboring refrigeration unit includes a compressor, a coolant line, and an electrically controlled T-valve on the coolant line downstream of the expansion valve; and the coolant input is coupled to the neighboring refrigeration unit's expansion valve via the electrically controlled T-valve; the cooling device further including: a signal line configured to transmit control signals to the neighboring refrigeration unit, the control signals for controlling compressor activation, and the electrically controlled T-valve.
In some embodiments, the cooling device further includes: a conduction plate coupled to the coolant input and to the coolant output, the conduction plate being a conductive heat exchanger connected in parallel with the convective heat exchanger, the conduction plate being capable of facilitating rapid cooling of the item to be cooled by cooling the item via conduction cooling. In some embodiments, the cooling device further includes: a cradle within the enclosure, the cradle being capable of receiving the item to be cooled, the cradle also being capable of executing rocking motion about at least one axis, so as to enhance conductive cooling of a liquid within the item to be cooled. In some embodiments, the cooling device further includes: a power source capable of powering the rocking motion of the cradle.
In some embodiments, the item to be cooled is a vessel having liquid contents, the cooling device further comprising: a turntable within the enclosure, the turntable being capable of receiving the vessel, the turntable also being capable of angular motion about a vertical axis, so as to engender relative motion between the liquid contents and an inner surface of the vessel.
Another general aspect of the invention is a cooling device for rapidly cooling an item is claimed, wherein the device includes: a thermally insulated enclosure, the enclosure having a thermally insulated door, the enclosure being sized so as to fit on a countertop, and being sized so as to enclose at least one item to be rapidly cooled; a fan located within the thermally insulated enclosure; a convective heat exchanger, the convective heat exchanger being capable of receiving coolant from a neighboring refrigeration unit and being capable of cooling air to be blown by the fan toward the item to be cooled; a coolant input, the coolant input being capable of delivering the coolant to the convective heat exchanger from the neighboring refrigeration unit; a coolant output, the coolant output being capable of returning the coolant to the neighboring refrigeration unit from the convective heat exchanger; a sensor capable of sensing a temperature of the item to be cooled; a control input capable of receiving a value corresponding to at least one of a desired temperature, and a desired cooling time, for the item to be cooled; a fan control module capable of adjusting air flow from the fan to the item to be cooled based on the at least one of the desired temperature, and the desired cooling time, of the item to be cooled; a coolant flow module capable of adjusting coolant delivery to the cooling device based on the at least one of the desired temperature, and the desired cooling time, of the item to be cooled; a controller capable of executing instructions so as control at least one of the sensor, the control input, the fan control module, and the coolant flow module; and a memory in communication with the controller, the memory being capable of storing instructions to be executed by the controller.
Another general aspect of the invention is a system for rapidly cooling an item, wherein the system includes: a refrigeration unit; a thermally insulated enclosure connected to the refrigeration unit, the enclosure having a thermally insulated door, the enclosure being sized so as to fit on a countertop, and being sized so as to enclose at least one item to be rapidly cooled; a fan located within the thermally insulated enclosure; a convective heat exchanger, the convective heat exchanger being capable of receiving coolant from a neighboring refrigeration unit and being capable of cooling air to be blown by the fan toward the item to be cooled; a coolant input, the coolant input being capable of delivering expanded coolant from an expansion valve of the neighboring refrigeration unit to the convective heat exchanger from the neighboring refrigeration unit; at least one flow valve coupled to the coolant input and configured to enable and disable flow of coolant from the expansion valve of the neighboring refrigeration unit; and a coolant output, the coolant output being capable of returning the coolant to the neighboring refrigeration unit from the convective heat exchanger.
The invention will be more fully understood by reference to the detailed description, in conjunction with the accompanying figures, wherein:
Each of the refrigerator 102 and countertop rapid cooler 100 has its own power connection 110 and 112, respectively, to a wall outlet. Although the countertop rapid cooler 100 is shown having a see-through door 114 with a window 116, in some preferred embodiments the countertop rapid cooler can have a door without a window. The refrigerator also has a door 103 that is configured to provide access to a cooling chamber within the refrigerator for placement and retrieval of items placed in the cooling chamber. In some preferred embodiments the refrigerator 102 and the cooling device 100 can constitute a system for rapidly cooling an item.
Coolant is received from an external store of coolant, such as a neighboring refrigerator or freezer. In some embodiments, the received coolant can be drawn from an expansion valve of the neighboring refrigerator or freezer. In some of these embodiments, the coolant flow from the expansion valve may be controlled by a coolant flow module or other feedback arrangement that can adjust, such as an electromechanical flow valve for example. In some embodiments, the flow valve can be an electrically controlled T-valve. If coolant is drawn from an expansion valve of a neighboring unit, the hose carrying the coolant from the neighboring unit to the countertop rapid cooler can be insulated, so as to not allow heat transfer between the coolant and the ambient air.
In other embodiments, the coolant can be drawn from a neighboring unit at a point before the expansion valve of the neighboring unit. Thus, the coolant would still be in an unexpanded state as it was transferred from the neighboring unit to the countertop rapid cooler. The unexpanded coolant can then travel through a pressure hose to the countertop rapid cooler, where it is then expanded via an expansion valve. The expansion valve would be located before the convective heat exchanger, and optimally within the thermal enclosure.
A temperature sensor 308, for example, an infrared sensor, or IR thermometer, can be disposed in the ceiling of the enclosure 304, and can detect a temperature of the item 306 to be chilled. IR thermometers are widely known, even for sensing temperatures of beer cans in freezers. For some items, the temperature can be sensed by a temperature probe (not shown) that can be put in contact with the exterior of the item to be cooled, or inserted into the item to be cooled.
A light 310 at the upper rear of the enclosure 304 can be activated by a door switch (902, see
At the upper right of the enclosure 304 is an inlet port 312 for chilled air, designed to direct the chilled air toward the item 306 to be chilled. The inlet port 312 is shaped for high speed air flow into the enclosure 304 so as to provide a substantial “wind-chill” effect. Two outlet ports 314a and 314b at the bottom right of the enclosure 304 allow return flow of air to a fan and convective heat exchanger (see
The coolant delivery line 104 is also referred to in this disclosure and in the accompanying claims as a coolant input, and is adapted to deliver chilled coolant to the convective heat exchanger from a neighboring refrigeration unit. The coolant return line 106 is also referred to in this disclosure and in the accompanying claims as a coolant output, and is adapted to return coolant from the convective heat exchanger to the neighboring refrigeration unit. The convective heat exchanger 402 is discussed below in connection with
The fan 404 is configured to blow air through the convective heat exchanger toward the item 306 (see
The control signal cable 108 is shown as a single line, but it is to be understood that the control signal cable can be a multiconductor cable, and can carry multiple signals between the countertop rapid cooler 100 (see
The fan 404, absent its case 412 (see
In this embodiment, the temperature sensor 308 (see
In certain embodiments of the present invention, the conduction plate 502 (see
In certain preferred embodiments, the refrigerator 102 may include a coolant line tap (not shown) instead of the T-valve 802. The coolant line tap may be similar to taps used, for example, with propane lines, or similar to cold water line taps that can be used to provide a water line connection for a domestic refrigerator icemaker. In these embodiments, the coolant line tap couples the coolant input 104 to the expansion valve 808.
The refrigerator 102 in addition includes a condenser 816, and at least one cooling tube 818. The cooling tube 818, with other coolant lines in the refrigerator 102, form a coolant circuit through which coolant circulates from the compressor 814, to the condenser 816, the expansion valve 808, and the cooling tube to a cooling chamber (not shown) within the refrigerator and accessible through a door 103 (see
Also shown in
The fan control module 916 is coupled to the fan 404 (see
In a step 1004, the countertop rapid cooler 100 senses a temperature of the item 306 (see
On the other hand, if the temperature of the item 306 (see
For example, the delivery of coolant may be slowed according to a particular process or schedule of coolant delivery, as the sensed temperature of the item approaches the desired temperature. In various embodiments, for example, the coolant may be delivered according to a delivery rate that varies logarithmically with the difference between the sensed temperature and the desired temperature. In various other embodiments, the coolant delivery may continue at the same rate, for example, until the item has attained the desired temperature within a particular tolerance. The adjusting of coolant delivery 894 may be under the control of, or according to instructions of, the coolant flow module 914 (see
Returning to
In a step 1104, the countertop rapid cooler 100 (see
On the other hand, if the temperature of the item 306 (see
As discussed above, the invention is a cooling device for rapidly cooling an item, using convection cooling. The convection cooling is provided via a fan included in the cooling device, the fan configured to blow chilled air toward an item to rapidly cool the item. In preferred embodiments of the invention, the cooling device does not contain a mechanical compressor and condenser. Instead, the cooling device includes a coolant input to deliver chilled coolant to the cooling device. The coolant input receives chilled coolant from a neighboring refrigeration unit, for example, a refrigerator or a freezer. Thus, the cooling device can use less space than current rapid cooling devices with comparable capacity, such as rapid cooling refrigerators. Due to its reduced size, the cooling device may be less costly to manufacture, and may consume less energy to provide the same amount of rapid cooling capacity as currently available rapid cooling devices. In this way, a rapid cooling device is provided that can be more economical for home, recreational, small business, and even industrial users.
Other modifications and implementations will occur to those skilled in the art without departing from the spirit and the scope of the invention as claimed. Accordingly, the above description is not intended to limit the invention except as indicated in the following claims.
Claims
1. A cooling device for rapid cooling of items, the cooling device comprising:
- a thermally insulated enclosure, the enclosure having a thermally insulated door, the enclosure being sized so as to fit on a countertop, and being sized so as to enclose at least one item to be rapidly cooled;
- a fan located within the thermally insulated enclosure;
- a convective heat exchanger, the convective heat exchanger being capable of receiving coolant from a neighboring refrigeration unit and being capable of cooling air to be blown by the fan toward the item to be cooled;
- a coolant input, the coolant input being capable of delivering the coolant to the convective heat exchanger from the neighboring refrigeration unit; and
- a coolant output, the coolant output being capable of returning the coolant to the neighboring refrigeration unit from the convective heat exchanger.
2. The cooling device of claim 1, wherein an inside space of the thermally insulated enclosure is of a volume that falls within a range of volumes of inside spaces of typical microwave ovens.
3. The cooling device of claim 1, wherein the coolant input is adapted to receive expanded coolant from an expansion valve of the neighboring refrigeration unit.
4. The cooling device of claim 3, further comprising:
- at least one flow valve coupled to the coolant input and configured to enable and disable flow of coolant from the expansion valve of the neighboring refrigeration unit.
5. The cooling device of claim 1, wherein the coolant input is adapted to receive compressed coolant from a neighboring refrigeration unit, and wherein the coolant input includes an expansion valve for expanding the coolant, the expansion valve being located:
- within the thermally insulated enclosure; and
- prior to the convective heat exchanger.
6. The cooling device of claim 1, wherein the convective heat exchanger is a tube-and-fin system.
7. The cooling device of claim 1, further comprising:
- a sensor capable of sensing a temperature of the item to be cooled; and
- a coolant flow module capable of adjusting coolant delivery to the cooling device based on the temperature sensed by the sensor.
8. The cooling device of claim 1, further comprising:
- a control input capable of receiving a value corresponding to at least one of: a desired temperature; and a desired cooling time for the item to be cooled; and
- a coolant flow module capable of adjusting coolant delivery to the cooling device based on the at least one of: the desired temperature; and the desired cooling time of the item to be cooled.
9. The cooling device of claim 1, further comprising:
- a sensor capable of sensing a temperature of the item to be cooled; and
- a fan control module capable of adjusting air flow from the fan to the item to be cooled based on the temperature of the item sensed by the sensor.
10. The cooling device of claim 1, further comprising:
- a control input capable of receiving a value corresponding to at least one of: a desired temperature; and a desired cooling time for the item to be cooled; and
- a fan control module capable of adjusting air flow from the fan to the item to be cooled based on the at least one of: the desired temperature; and the desired cooling time of the item to be cooled.
11. The cooling device of claim 3, wherein:
- the neighboring refrigeration unit includes a compressor and a coolant line; and
- the coolant input is coupled to the expansion valve via a coolant line tap downstream of the expansion valve, the cooling device further including:
- a signal line configured to transmit control signals to the neighboring refrigeration unit, the control signals for controlling compressor activation.
12. The cooling device of claim 1, wherein: the cooling device further comprising:
- the neighboring refrigeration unit includes a compressor, a coolant line, and an electrically controlled T-valve on the coolant line downstream of the expansion valve; and
- the coolant input is coupled to the neighboring refrigeration unit's expansion valve via the electrically controlled T-valve;
- a signal line configured to transmit control signals to the neighboring refrigeration unit, the control signals for controlling: compressor activation; and the electrically controlled T-valve.
13. The cooling device of claim 1, further comprising:
- a conduction plate coupled to the coolant input and to the coolant output, the conduction plate being a conductive heat exchanger connected in parallel with the convective heat exchanger, the conduction plate being capable of facilitating rapid cooling of the item to be cooled by cooling the item via conduction cooling.
14. The cooling device of claim 1, further comprising:
- a cradle within the enclosure,
- the cradle being capable of receiving the item to be cooled,
- the cradle also being capable of executing rocking motion about at least one axis, so as to enhance conductive cooling of a liquid within the item to be cooled.
15. The cooling device of claim 14, further comprising a power source capable of powering the rocking motion of the cradle.
16. The cooling device of claim 1, wherein the item to be cooled is a vessel having liquid contents, the cooling device further comprising:
- a turntable within the enclosure,
- the turntable being capable of receiving the vessel,
- the turntable also being capable of angular motion about a vertical axis, so as to cause relative motion between the liquid contents and an inner surface of the vessel.
17. A cooling device for rapidly cooling an item, the device comprising:
- a thermally insulated enclosure, the enclosure having a thermally insulated door, the enclosure being sized so as to fit on a countertop, and being sized so as to enclose at least one item to be rapidly cooled;
- a fan located within the thermally insulated enclosure;
- a convective heat exchanger, the convective heat exchanger being capable of receiving coolant from a neighboring refrigeration unit and being capable of cooling air to be blown by the fan toward the item to be cooled;
- a coolant input, the coolant input being capable of delivering the coolant to the convective heat exchanger from the neighboring refrigeration unit;
- a coolant output, the coolant output being capable of returning the coolant to the neighboring refrigeration unit from the convective heat exchanger;
- a sensor capable of sensing a temperature of the item to be cooled;
- a control input capable of receiving a value corresponding to at least one of: a desired temperature; and a desired cooling time for the item to be cooled;
- a fan control module capable of adjusting air flow from the fan to the item to be cooled based on the at least one of: the desired temperature; and the desired cooling time of the item to be cooled;
- a coolant flow module capable of adjusting coolant delivery to the cooling device based on the at least one of: the desired temperature; and the desired cooling time of the item to be cooled;
- a controller capable of executing instructions so as control at least one of: the sensor; the control input; the fan control module; and the coolant flow module; and
- a memory in communication with the controller, the memory being capable of storing instructions to be executed by the controller.
18. A system for rapidly cooling an item, the system comprising:
- a refrigeration unit;
- a thermally insulated enclosure connected to the refrigeration unit, the enclosure having a thermally insulated door, the enclosure being sized so as to fit on a countertop, and being sized so as to enclose at least one item to be rapidly cooled;
- a fan located within the thermally insulated enclosure;
- a convective heat exchanger, the convective heat exchanger being capable of receiving coolant from a neighboring refrigeration unit and being capable of cooling air to be blown by the fan toward the item to be cooled;
- a coolant input, the coolant input being capable of delivering expanded coolant from an expansion valve of the neighboring refrigeration unit to the convective heat exchanger from the neighboring refrigeration unit;
- at least one flow valve coupled to the coolant input and configured to enable and disable flow of coolant from the expansion valve of the neighboring refrigeration unit; and
- a coolant output, the coolant output being capable of returning the coolant to the neighboring refrigeration unit from the convective heat exchanger.
Type: Application
Filed: Nov 19, 2011
Publication Date: May 23, 2013
Inventor: Jason Goode (Rockville, MD)
Application Number: 13/300,572
International Classification: F25B 49/00 (20060101); F25D 17/06 (20060101);