[특허]Aircraft galley liquid cooling system

B/E AEROSPACE, INC.

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Aircraft galley liquid cooling system

국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F25D-017/02 F25D-017/00 G05D-023/00 G05D-023/19 F25B-005/02 B64D-011/04 B64D-013/06
출원번호	US-0215555 (2011-08-23)
등록번호	US-9188380 (2015-11-17)
발명자 / 주소	Lu, Qiao Godecker, William
출원인 / 주소	B/E AEROSPACE, INC.
대리인 / 주소	Drinker Biddle & Reath LLP
인용정보	피인용 횟수 : 2 인용 특허 : 27

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A storage compartment cooling apparatus includes a liquid circulation system that circulates a liquid coolant, a heat exchanger that cools an interior of a storage compartment using the liquid coolant, a bypass line through which the liquid coolant selectively bypasses the heat exchanger, one or more valves that controllably increase and decrease the flow of the liquid coolant through the heat exchanger and the bypass line, and a controller that controls the one or more valves. A storage compartment cooling system includes a liquid coolant distribution loop that distributes a chilled liquid coolant to a plurality of the storage compartment cooling apparatuses coupled in series and a recirculation cooling device that includes a chiller that chills the liquid coolant to have a temperature lower than an ambient temperature and a circulation unit that circulates the chilled liquid coolant through the liquid coolant distribution loop. A method of controlling the storage compartment cooling system includes reversing a direction of flow of the liquid coolant in the liquid coolant distribution loop.

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1. A storage compartment cooling system comprising: a liquid coolant distribution loop that distributes a chilled liquid coolant to a plurality of storage compartment cooling apparatuses coupled with the liquid coolant distribution loop, the liquid coolant of the liquid circulation distribution loop not undergoing compression by a compressor of a vapor cycle system;a recirculation cooling device including a chiller that chills the liquid coolant to have a temperature lower than an ambient temperature and a circulation unit that circulates the chilled liquid coolant through the liquid coolant distribution loop; andthe plurality of storage compartment cooling apparatuses coupled with the liquid coolant distribution loop, the plurality of storage compartment cooling apparatuses arranged in one of two configurations: 1) in an in-parallel configuration, where each storage compartment cooling apparatus is in parallel flow with respect to the other storage compartment cooling apparatuses, or2) in an in-series configuration, where each storage compartment cooling apparatus is in series flow with respect to the other storage compartment cooling apparatuses;each of the plurality of storage compartment cooling apparatuses including: 1) a liquid circulation system having a first port and a second port, each of the first port and second port in fluid communication with the liquid coolant distribution loop such that one of the first and second ports receives the liquid coolant from and the other of the first and second ports returns the liquid coolant to the liquid coolant distribution loop, the liquid circulation system configured to circulate the liquid coolant between the first port and the second port;2) a heat exchanger disposed in the liquid circulation system between the first port and the second port and through which the liquid coolant flows to cool an interior of a storage compartment by transferring heat from the interior of the storage compartment into the liquid coolant;3) a bypass line disposed in the liquid circulation system in parallel with the heat exchanger and through which liquid coolant selectively flows to bypass the heat exchanger;4) one or more valves that controllably increase and decrease the flow of the liquid coolant through the heat exchanger and controllably increase and decrease the flow of the liquid coolant through the bypass line; and5) a controller that controls the one or more valves to increase and decrease the flow of the liquid coolant through the heat exchanger and increase and decrease the flow of the liquid coolant through the bypass line;wherein each of the controllers is configured to receive a control signal indicating whether the storage compartment cooling apparatuses are in the in-parallel configuration or the in-series configuration, the controller programmed to execute the following control scheme in response to the control signal: in the in-parallel liquid circulation configuration, the controller controls the one or more valves to substantially prevent the flow of liquid coolant through the bypass line regardless of the flow of liquid coolant through the heat exchanger such that the total flow of liquid coolant through the liquid circulation system between the first port and the second port is substantially equal to the flow of liquid coolant through the heat exchanger, andin the in-series liquid circulation configuration, the controller proportionally controls the one or more valves to increase and decrease the flow of the liquid coolant through the bypass line in reverse correspondence with the increase and decrease of the flow of the liquid coolant through the heat exchanger such that the total flow of liquid coolant through the liquid circulation system between the first port and the second port is substantially constant while the flow of the liquid coolant through each of the bypass line and heat exchanger change. 2. The storage compartment cooling system of claim 1, further comprising a reversible flow unit that reverses a direction of flow of the liquid coolant through the liquid coolant distribution loop, wherein the plurality of storage compartment cooling apparatuses are coupled in series with the liquid coolant distribution loop and each of the plurality of storage compartment cooling apparatuses are in the in-series liquid circulation mode. 3. The storage compartment cooling system of claim 2, further comprising a controller that controls the reversible flow unit to reverse the direction of flow of the liquid coolant through the liquid coolant distribution loop based on at least a measured temperature of the liquid coolant received from at least one of the plurality of storage compartment cooling apparatuses. 4. The storage compartment cooling system of claim 2, further comprising a controller that controls the reversible flow unit to reverse the direction of flow of the liquid coolant through the liquid coolant distribution loop based on at least a duration of time elapsed since the direction of flow was last reversed. 5. The storage compartment cooling system of claim 2, wherein the direction of flow of the liquid coolant through the recirculation cooling device is not reversed while the direction of flow through the liquid coolant distribution loop is reversed. 6. The storage compartment cooling system of claim 5, wherein the reversible flow unit includes at least four valves disposed in a circulation pattern to control a flow of the liquid coolant between the recirculation cooling device and the liquid coolant distribution loop, wherein when the direction of flow of the liquid coolant in the liquid coolant distribution loop is in a forward direction, a first two of the four valves are open while a second two of the four valves are closed, and when the direction of flow of the liquid coolant in the liquid coolant distribution loop is in a reverse direction, the first two of the four valves are closed while the second two of the four valves are open. 7. The storage compartment cooling system of claim 1, wherein each of the plurality of storage compartment cooling apparatuses further includes a temperature sensor that measures a temperature associated with at least one of the storage compartment, the liquid circulation system, and an air circulation loop between the heat exchanger and the storage compartment, and wherein the controller controls the one or more valves in response to a measurement of the temperature received from the temperature sensor. 8. The storage compartment cooling system of claim 1, wherein each of the plurality of storage compartment cooling apparatuses further includes a fan, wherein the heat exchanger includes a liquid-to-air heat exchanger, andwherein the fan circulates air in a loop between the liquid-to-air heat exchanger and the storage compartment. 9. The storage compartment cooling system of claim 8, wherein the controller of each of the plurality of storage compartment cooling apparatuses performs a defrost cycle by controlling the one or more valves to prevent the flow of liquid coolant through the heat exchanger while operating the fan to circulate air in the loop between the liquid-to-air heat exchanger and the storage compartment. 10. The storage compartment cooling system of claim 8, wherein each of the plurality of storage compartment cooling apparatuses further includes a duct configured to direct the air into contact with the liquid-to-air heat exchanger and through the fan, and wherein the fan is a centrifugal fan configured to cause the air to flow into the fan from a direction approximately parallel with an axis of rotation of the fan and output the air to a direction approximately perpendicular with the axis of rotation of the fan. 11. The storage compartment cooling system of claim 1, wherein the heat exchanger of each of the plurality of storage compartment cooling apparatuses includes a cold wall conduction heat exchanger in thermal communication with the storage compartment. 12. A method of controlling a storage compartment cooling system comprising a plurality of storage compartment cooling apparatuses and a liquid coolant distribution loop coupled with the plurality of storage compartment cooling apparatuses to distribute a chilled liquid coolant to the plurality of storage compartment cooling apparatuses, each of the plurality of storage compartment cooling apparatuses including a controller and a bypass line disposed in parallel with a heat exchanger using one or more valves configured to selectively divert the liquid coolant from the liquid coolant distribution loop through the bypass line to bypass the heat exchanger, the liquid coolant not undergoing compression by a compressor of a vapor cycle system, the method comprising: chilling the liquid coolant to have a temperature lower than an ambient temperature;circulating the liquid coolant through the liquid coolant distribution loop;receiving the liquid coolant from the liquid coolant distribution loop by a first port of each of the plurality of storage compartment cooling apparatuses;circulating the liquid coolant through each of the plurality of storage compartment cooling apparatuses between the first port and a second port, comprising in each of the plurality of storage compartment cooling apparatuses: circulating the liquid coolant through a heat exchanger disposed between the first port and the second port, thus transferring heat from an interior of a storage compartment of the storage compartment cooling apparatus into the liquid coolant to cool the interior of the storage compartment, and/orbypassing the liquid coolant around the heat exchanger;outputting the liquid coolant to the liquid coolant distribution loop by the second port of each of the plurality of storage compartment cooling apparatuses;controllably increasing and decreasing the flow of the liquid coolant through the heat exchanger;arranging the plurality of storage compartment cooling apparatuses in one of two configurations: 1) in an in-parallel configuration, where each storage compartment cooling apparatus is in parallel flow with respect to the other storage compartment cooling apparatuses, or2) in an in-series configuration, where each storage compartment cooling apparatus is in series flow with respect to the other storage compartment cooling apparatuses;inputting a control signal into each storage compartment cooling apparatus' respective controller, the control signal configured to indicate whether the storage compartment cooling apparatuses are in the in-parallel configuration or the in-series configuration;each respective controller programmed to execute the following control scheme in response to the control signal:in the in-parallel liquid circulation configuration, controlling the one or more valves to substantially prevent the flow of the liquid coolant through the bypass line regardless of the flow of liquid coolant through the heat exchanger such that the total flow of liquid coolant from the first port to the second port is substantially equal to the flow of liquid coolant through the heat exchanger, andin the in-series liquid circulation configuration, proportionally controlling the one or more valves to increase and decrease the flow of the liquid coolant through the bypass line in reverse correspondence with the increase and decrease of the flow of the liquid coolant through the heat exchanger such that the total flow of liquid coolant from the first port to the second port is substantially constant while the flow of the liquid coolant through each of the bypass line and heat exchanger change. 13. The method of claim 12, wherein the plurality of storage compartment cooling apparatuses are coupled in series with the liquid coolant distribution loop, and the method further comprises: determining whether a flow direction of the liquid coolant in the liquid coolant distribution loop should be reversed; andreversing the flow direction of the liquid coolant in the liquid coolant distribution loop from a forward flow direction to a reverse flow direction by a reversible flow unit when the determination is made to reverse the flow direction. 14. The method of claim 13, further comprising receiving temperature measurements from at least one of the plurality of storage compartment cooling apparatuses, and wherein the determination of whether the flow direction should be reversed is based on at least the temperature measurements. 15. The method of claim 13, wherein the determination of whether the flow direction should be reversed is based on at least a duration of time elapsed since the direction of flow was last reversed. 16. The method of claim 13, wherein a flow direction of liquid coolant through a heat exchanger that chills the liquid coolant does not reverse when the flow direction of the liquid coolant in the liquid coolant distribution loop reverses. 17. The method of claim 16, wherein reversing the flow direction comprises changing a state of a first two of four valves in the reversible flow unit from open to closed while changing a state of a second two of the four valves from closed to open, the four valves disposed in a circulation pattern to control a flow of the liquid coolant between the heat exchanger that chills the liquid coolant and the liquid coolant distribution loop. 18. The method of claim 12, further comprising in each of the plurality of storage compartment cooling apparatuses: measuring a temperature associated with at least one of the storage compartment, the liquid coolant distribution loop, and an air circulation loop between the heat exchanger and the storage compartment using a temperature sensor, andcontrolling the one or more valves in response to the measurement of the temperature received from the temperature sensor. 19. The method of claim 12, further comprising in each of the plurality of storage compartment cooling apparatuses: circulating air in a loop between a liquid-to-air heat exchanger and the storage compartment using a fan. 20. The method claim 19, further comprising in each of the plurality of storage compartment cooling apparatuses: performing a defrost cycle by controlling the one or more valves to prevent the flow of liquid coolant through the heat exchanger while operating the fan to circulate air in the loop between the liquid-to-air heat exchanger and the storage compartment. 21. The method claim 19, wherein the fan is a centrifugal fan, the method further comprising in each of the plurality of storage compartment cooling apparatuses: directing the air into contact with the liquid-to-air heat exchanger and through the fan using a duct, andcausing the air to flow into the fan from a direction approximately parallel with an axis of rotation of the fan and output the air to a direction approximately perpendicular with the axis of rotation of the fan.

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Aircraft galley liquid cooling system

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