Vehicle refrigerator having a liquid line subcooled vapor cycle system
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25B-021/02
F25B-040/00
F25B-040/02
F25B-047/02
F25B-049/02
출원번호
US-0215456
(2011-08-23)
등록번호
US-9134053
(2015-09-15)
발명자
/ 주소
Lu, Qiao
출원인 / 주소
B/E AEROSPACE, INC.
대리인 / 주소
Drinker Biddle & Reath LLP
인용정보
피인용 횟수 :
0인용 특허 :
16
초록▼
A vapor cycle refrigeration system includes a thermoelectric device (TED) as a sub-cooler to sub-cool liquid refrigerant exiting a condenser to increase cooling capacity of an evaporator and pull down temperature within a refrigerated compartment quickly. The TED sub-cooler is turned off after initi
A vapor cycle refrigeration system includes a thermoelectric device (TED) as a sub-cooler to sub-cool liquid refrigerant exiting a condenser to increase cooling capacity of an evaporator and pull down temperature within a refrigerated compartment quickly. The TED sub-cooler is turned off after initial temperature pull down and is not operated during steady state operation for maintenance of the compartment temperature.
대표청구항▼
1. A refrigeration system that cools a compartment, the refrigeration system comprising: a compressor,a condenser,a thermoelectric device (TED) sub-cooler including at least one TED, the TED sub-cooler including a hot side heat sink integrated with and in thermal communication with the condenser on
1. A refrigeration system that cools a compartment, the refrigeration system comprising: a compressor,a condenser,a thermoelectric device (TED) sub-cooler including at least one TED, the TED sub-cooler including a hot side heat sink integrated with and in thermal communication with the condenser on a same hot side of the at least one TED, the hot side heat sink sharing a cooling mechanism integrated with the condenser by which the hot side heat sink is to be cooled together with the condenser, and the TED sub-cooler including on an opposite side of the at least one TED a cold side fluid heat exchanger to sub-cool refrigerant that has passed through the condenser,an expansion valve,an evaporator, andtubing adapted to transport the refrigerant through the refrigeration system in a circulation order from the compressor to the condenser to the TED sub-cooler to the expansion valve to the evaporator and back to the compressor again. 2. The refrigeration system of claim 1, wherein the TED sub-cooler sub-cools the refrigerant exiting the condenser by at least approximately ten degrees Fahrenheit. 3. The refrigeration system of claim 1, wherein the TED sub-cooler operates when a difference between a measured temperature in the compartment and a temperature set point is greater than or equal to a preset threshold, and does not operate when the difference is less than the preset threshold. 4. The refrigeration system of claim 3, wherein the preset threshold is between approximately two and ten degrees Fahrenheit. 5. The refrigeration system of claim 1, further comprising a condenser fan that circulates air to cool both the condenser and the hot side heat sink of the TED sub-cooler. 6. The refrigeration system of claim 1, wherein the TED sub-cooler is powered by direct electrical current. 7. The refrigeration system of claim 1, wherein the TED sub-cooler is controlled using a Pulse Width Modulation control signal. 8. The refrigeration system of claim 1, further comprising an enclosure that encloses the compartment and the refrigeration system, the enclosure having a door that provides closeable access to the compartment and vents through which a condenser fan outputs condenser exhaust and inputs ambient air for cooling the condenser and the TED sub-cooler. 9. The refrigeration system of claim 1, further comprising a controller that controls the refrigeration system according to sensor data from temperature and pressure sensors in the refrigeration system. 10. The refrigeration system of claim 9, wherein the controller is remotely controlled using a computer system which communicates with the controller over a data communications network. 11. The refrigeration system of claim 1, further comprising a refrigerant heat exchanger that superheats refrigerant entering the compressor using refrigerant upstream of the expansion valve. 12. A method of controlling a refrigeration system comprising a compressor, a condenser, a thermoelectric device (TED) sub-cooler including at least one TED, the TED sub-cooler including a hot side heat sink integrated with and in thermal communication with the condenser on a same hot side of the at least one TED, the hot side heat sink sharing a cooling mechanism integrated with the condenser by which the hot side heat sink is to be cooled together with the condenser, and the TED sub-cooler including on an opposite side of the at least one TED a cold side fluid heat exchanger to sub-cool refrigerant after passing through the condenser, an expansion valve, an evaporator, and tubing adapted to transport the refrigerant through the refrigeration system in a circulation order from the compressor to the condenser to the TED sub-cooler to the expansion valve to the evaporator and back to the compressor again, the method comprising: inputting sensor data;determining whether a measured temperature of the compartment is greater than or equal to a preset threshold;controlling the TED sub-cooler when the temperature is greater than or equal to the preset threshold;not operating the TED sub-cooler when the temperature is less than the preset threshold;when operating the TED sub-cooler, cooling the hot side heat sink together with the condenser, and sub-cooling the refrigerant after passing through the condenser; andcontrolling motors and valves of the refrigeration system according to the sensor data to maintain a set temperature of the compartment within a predetermined maintenance range. 13. The method of claim 12, wherein the TED sub-cooler sub-cools the refrigerant exiting the condenser by at least approximately ten degrees Fahrenheit (F). 14. The method of claim 12, wherein the preset threshold is between approximately two and ten degrees F. 15. The method of claim 12, further comprising circulating air to cool both the condenser and a hot side heat sink of the TED sub-cooler using a fan. 16. The method of claim 12, wherein the TED sub-cooler is powered by direct electrical current. 17. The method of claim 12, wherein the TED sub-cooler is controlled using a Pulse Width Modulation control signal. 18. The method of claim 12, wherein the sensor data is received from temperature and pressure sensors in the refrigeration system. 19. The method of claim 12, further comprising remotely controlling the refrigeration system using a computer system which communicates with the controller over a data communications network. 20. The method of claim 12, further comprising superheating the refrigerant upstream of the compressor by a refrigerant heat exchanger using refrigerant upstream of the expansion valve.
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