[특허]System and method for providing efficient cooling within a test environment

Raytheon Company

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특허 상세정보

MyON담기

내보내기 페이스북 공유 트위터 공유 카카오톡 공유

System and method for providing efficient cooling within a test environment

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25B-007/00 F25D-013/00 G01N-017/00
출원번호	US-0190999 (2011-07-26)
등록번호	US-9297569 (2016-03-29)
발명자 / 주소	Taylor, Mark A. Tolbert, Don R.
출원인 / 주소	Raytheon Company
인용정보	피인용 횟수 : 0 인용 특허 : 8

초록
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A system and method for cooling an environmental test chamber is described where a controller is in communication with an auxiliary cooling unit and the primary refrigeration unit. A first chamber temperature measurement associated with the environmental test chamber is received, and the heat load associated with a target temperature is determined. Based on the first chamber temperature measurement and the heat load, it is determined that the auxiliary cooling unit can sustain the target temperature. In response to the determination, the controller is us...

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1. A cooling system comprising: an environmental test chamber having an inner cavity;a primary refrigeration unit configured to cool the inner cavity of the environmental test chamber;an auxiliary cooling unit configured to independently cool the inner cavity of the environmental test chamber, the auxiliary cooling unit having a cooling capacity that is less than a cooling capacity of the primary refrigeration unit, the auxiliary cooling unit comprising: a housing that is external to the primary refrigeration unit;a first closed loop configured to circulate a first refrigerant between a primary compressor, a heat exchanger, a cascade exchanger, and the environmental test chamber; anda second closed loop configured to circulate a second refrigerant between a secondary compressor, a condensor, the cascade exchanger, and a sub-cooler, wherein the cascade exchanger is common to both the first closed loop and the second closed loop and is configured to exchange heat between the first refrigerant and the second refrigerant; anda controller comprising logic that is configured to: determine if the auxiliary cooling unit is able to sustain a target temperature; andin response to determining that the auxiliary cooling unit is able to sustain the target temperature, power on the auxiliary cooling unit and time out or turn off the primary refrigeration unit. 2. The cooling system of claim 1, wherein the primary compressor, secondary compressor, heat exchanger, and cascade exchanger of the auxiliary cooling unit are arranged in a cascade configuration. 3. The cooling system of claim 1, wherein the controller further comprises logic that is configured to determine that the target temperature is greater than a temperature of water being supplied to at least one of the heat exchanger or the cascade exchanger and power off at least one of the primary compressor or the secondary compressor. 4. The cooling system of claim 1, wherein the controller further comprises logic that is configured to: receive a chamber temperature measurement associated with the environmental test chamber;based on the chamber temperature measurement, determine that the auxiliary cooling unit cannot sustain the target temperature; andin response to determining that the auxiliary cooling unit cannot sustain the target temperature, power on the primary refrigeration unit. 5. The cooling system of claim 1, wherein the auxiliary cooling unit further comprises: a solenoid valve configured to selectively control removal of a portion of the first refrigerant that is transported to the environmental test chamber. 6. The cooling system of claim 1, wherein the primary refrigeration unit comprises: a third closed loop configured to circulate a third refrigerant between a second primary compressor, a primary heat exchanger, and the environmental test chamber; anda fourth closed loop configured to circulate a fourth refrigerant between a second secondary compressor and at least one secondary heat exchanger. 7. The cooling system of claim 1, wherein the controller is configured to determine that the auxiliary cooling unit is able to sustain the target temperature in response to determining that the primary refrigeration unit is operating less than 15 percent of a given time. 8. A cooling system comprising: an auxiliary cooling unit configured to provide auxiliary cooling of an environmental test chamber independently of a primary refrigeration unit, the auxiliary cooling unit having a cooling capacity less than a cooling capacity of the primary refrigeration unit, the auxiliary cooling unit comprising: a housing that is external to the primary refrigeration unit;a first closed loop configured to circulate a first refrigerant between a primary compressor, a heat exchanger, a cascade exchanger, and the environmental test chamber; anda second closed loop configured to circulate a second refrigerant between a secondary compressor, a condensor, the cascade exchanger, and a sub-cooler, wherein the cascade exchanger is common to both the first closed loop and the second closed loop and is configured to exchange heat between the first refrigerant and the second refrigerant; anda controller comprising logic that is configured to: determine if the auxiliary cooling unit is able to sustain a target temperature; andin response to determining that the auxiliary cooling unit is able to sustain the target temperature, transmit a signal to power on the auxiliary cooling unit and transmit a signal to time out or turn off the primary refrigeration unit. 9. The cooling system of claim 8, wherein the primary compressor, secondary compressor, heat exchanger, and cascade exchanger of the auxiliary cooling unit are arranged in a cascade configuration. 10. The cooling system of claim 8, wherein the controller further comprises logic that is configured to determine that the target temperature is greater than a temperature of water being supplied to at least one of the heat exchanger or the cascade exchanger and power off at least one of the primary compressor or the secondary compressor. 11. The cooling system of claim 8, wherein the controller further comprises logic that is configured to: receive a chamber temperature measurement associated with the environmental test chamber;based on the chamber temperature measurement, determine that the auxiliary cooling unit cannot sustain the target temperature; andin response to determining that the auxiliary cooling unit cannot sustain the target temperature, transmit a signal to power on the primary refrigeration unit. 12. The cooling system of claim 8, wherein the auxiliary cooling unit further comprises: a solenoid valve configured to selectively control removal of a portion of the first refrigerant that is transported to the environmental test chamber. 13. The cooling system of claim 8, wherein the controller is configured to determine that the auxiliary cooling unit is able to sustain the target temperature in response to determining that the primary refrigeration unit is operating less than 15 percent of a given time. 14. A method for cooling, comprising: communicating, at a controller, with an auxiliary cooling unit and a primary refrigeration unit, the auxiliary cooling unit configured to independently provide auxiliary cooling of an environmental test chamber, the auxiliary cooling unit having a cooling capacity less than a cooling capacity of the primary refrigeration unit, the auxiliary cooling unit comprising: a housing that is external to the primary refrigeration unit;a first closed loop configured to circulate a first refrigerant between a primary compressor, a heat exchanger, a cascade exchanger, and the environmental test chamber; anda second closed loop configured to circulate a second refrigerant between a secondary compressor, a condensor, the cascade exchanger, and a sub-cooler, wherein the cascade exchanger is common to both the first closed loop and the second closed loop and is configured to exchange heat between the first refrigerant and the second refrigerant;receiving information associated with a first chamber temperature measurement, the first chamber temperature measurement associated with the environmental test chamber;based on the first chamber temperature measurement, determining using logic of the controller that the auxiliary cooling unit is able to sustain a target temperature; andin response to determining that the auxiliary cooling unit is able to sustain the target temperature, transmitting a signal to power on the auxiliary cooling unit and transmitting a signal to time out or turn off the primary refrigeration unit using the controller. 15. The method of claim 14, wherein the primary compressor, secondary compressor, heat exchanger, and cascade exchanger of the auxiliary cooling unit are arranged in a cascade configuration. 16. The method of claim 14, further comprising: determining that the target temperature is greater than a temperature of water being supplied to at least one of the heat exchanger or the cascade exchanger; andpowering off at least one of the primary compressor or the secondary compressor. 17. The method of claim 14, further comprising: receiving a second chamber temperature measurement associated with the environmental test chamber;based on the second chamber temperature measurement, determining that the auxiliary cooling unit cannot sustain the target temperature; andin response to determining that the auxiliary cooling unit cannot sustain the target temperature, transmitting a signal to power on the primary refrigeration unit. 18. The method of claim 14, further comprising: operating a solenoid valve to selectively control removal of a portion of the first refrigerant that is transported to the environmental test chamber. 19. The method of claim 14, wherein determining that the auxiliary cooling unit is able to sustain the target temperature comprises determining that the primary refrigeration unit is operating less than 15 percent of a given time. 20. The method of claim 14, further comprising: circulating a third refrigerant in a third closed loop that couples a second primary compressor, a primary heat exchanger, and the environmental test chamber; andcirculating a fourth refrigerant in a fourth closed loop that couples a second secondary compressor and at least one secondary heat exchanger.

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