Cryogenic temperature control apparatus and method
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F25D-017/02
G17C-009/02
F25B-041/04
출원번호
US-0187459
(2002-07-01)
발명자
/ 주소
VanderWoude, David J.
Viegas, Herman H.
Seshadri, Jayaram
Glentz, Joseph Louis
Schwichtenberg, Bryan Edward
Shaw, J. J.
출원인 / 주소
Thermo King Corporation
대리인 / 주소
Michael Best & Friedrich LLP
인용정보
피인용 횟수 :
10인용 특허 :
114
초록▼
A method of temperature control in a cryogenic temperature control apparatus comprises providing a heat exchanger in thermal communication with an air-conditioned space. The heat exchanger includes an air inlet and an evaporator coil having an outlet. The method further comprises providing a first t
A method of temperature control in a cryogenic temperature control apparatus comprises providing a heat exchanger in thermal communication with an air-conditioned space. The heat exchanger includes an air inlet and an evaporator coil having an outlet. The method further comprises providing a first temperature sensor being operatively coupled to a controller, measuring the temperature in the outlet and sending the temperature in the outlet to the controller, providing a second temperature sensor being operatively coupled to the controller, measuring the temperature in the air inlet, and sending the temperature in the air inlet to the controller, and providing a plurality of temperature control values. The flow of cryogen from a storage tank to the evaporator coil is altered each time the temperature in the outlet passes one of a first plurality of temperature control values and each time the temperature in the air inlet passes one of a second plurality of temperature control values.
대표청구항▼
A method of temperature control in a cryogenic temperature control apparatus comprises providing a heat exchanger in thermal communication with an air-conditioned space. The heat exchanger includes an air inlet and an evaporator coil having an outlet. The method further comprises providing a first t
A method of temperature control in a cryogenic temperature control apparatus comprises providing a heat exchanger in thermal communication with an air-conditioned space. The heat exchanger includes an air inlet and an evaporator coil having an outlet. The method further comprises providing a first temperature sensor being operatively coupled to a controller, measuring the temperature in the outlet and sending the temperature in the outlet to the controller, providing a second temperature sensor being operatively coupled to the controller, measuring the temperature in the air inlet, and sending the temperature in the air inlet to the controller, and providing a plurality of temperature control values. The flow of cryogen from a storage tank to the evaporator coil is altered each time the temperature in the outlet passes one of a first plurality of temperature control values and each time the temperature in the air inlet passes one of a second plurality of temperature control values. 19980600, Kountz et al.; US-5787940, 19980800, Bonn et al.; US-5868176, 19990200, Barajas et al.; US-5884488, 19990300, Gram et al.; US-5916246, 19990600, Viegas et al.; US-5954101, 19990900, Drube et al. in engagement with respective bars, a shaft supported by the vehicle and to which the wheels are fixed, said wheels and shaft rotate in unison to synchronize the shifting of the bars with respect to the rails. 3. The invention of claim 2, wherein the wheels include gear teeth which engage toothed racks on the respective bars. 4. The invention of claim 2, and further comprising a support mounted with the vehicle frame and which engages the tool frame in the retracted position for at least partially supporting the tool frame in the retracted position. 5. The invention of claim 4, wherein the bar is movably carried by the rail between at least one lower and one upper support roller. 6. The invention of claim 5, wherein the tool attachment further comprises mower units which are supported by the tool frame in overlapping fashion. 7. A vehicle comprising: a vehicle frame, a plurality of rail members mounted with the vehicle frame, a tool frame to which is coupled a tool attachment, said tool frame comprising a plurality of bars being shiftably supported by respective rails and linearly shiftable in operative engagement with said rails between a retracted operating position whereat the tool attachment is in an operating position in close proximity to the vehicle, and an extended maintenance position whereat the tool attachment is shifted upward and outwardly from the vehicle frame for providing access to the tool attachment, said bar having a shape corresponding to the shape of the rails, the tool attachment in the operating position is at least partially within the boundary of the vehicle, the rails are elongated and oriented at an angle to a surface of the ground, and the bars are oriented in alignment with respective rails and shift generally along said rails upward and outwardly away from the vehicle as the tool frame shifts to the extended maintenance position, the rails extend generally longitudinally in the direction of vehicle travel and the tool frame is shiftable along the rails generally longitudinally in the direction of vehicle travel, a linear actuator engaged with the tool frame for shifting the tool frame between the extended and retracted positions, the bars are received within respective rails and are shiftable therein in telescoping fashion, a plurality of wheels in engagement with respective bars, a shaft supported by the vehicle and to which the wheels are fixed, said wheels and shaft rotate in unison to synchronize the shifting of the bars with respect to the rails, wherein the wheels include gear teeth which engage toothed racks on the respective bars. 8. A vehicle comprising: a vehicle frame, a plurality of elongate rail members mounted in fixed position with respect to the vehicle frame and oriented at an angle to a surface of the ground, a tool frame to which is coupled a tool attachment, said tool frame having a plurality of bars oriented in alignment with the rail members and shiftably supported by respective rails and linearly shiftable in operative engagement with said rails between retracted operating positions whereat the tool attachment is in an operating position in close proximity to the vehicle, and extended maintenance positions whereat the tool attachment is shifted upward and outwardly from the vehicle frame for providing access to the tool attachment, means for ensuring synchronous movement of said bars wherein said tool attachments are mower units. 9. A vehicle comprising: a vehicle frame, a plurality of elongate rail members mounted in fixed position with respect to the vehicle frame and oriented at an angle to a surface of the ground, a tool frame to which is coupled a tool attachment, said tool frame having a plurality of bars oriented in alignment with the rail members and shiftably supported by respective rails and linearly shiftable in operative engagement with said rails between retracted operating positions whereat the tool attachment is in an operating position in close proximity to the vehicle, and extended maintenance positions whereat the tool attachment is shifted upward and outwardly from the vehicle frame for providing access to the tool attachment, means for ensuring synchronous movement of said bars, wherein the means for ensuring synchronous movement of the bars further comprises a plurality of wheels in engagement with respective bars, and a shaft supported by the vehicle and to which the wheels are fixed, said wheels and shaft rotate in unison to synchronize the shifting of the bars with respect to the rails, and wherein the wheels include gear teeth which engage toothed racks on the respective bars, wherein said tool attachments are mower units. 10. A vehicle comprising: a vehicle frame, a plurality of elongate rail members mounted with the vehicle frame and oriented at an angle to a surface of the ground, a tool frame to which is coupled a tool attachment, said tool frame having a plurality of bars oriented in alignment with the rail members and shiftably supported by respective rails and linearly shiftable in operative engagement with said rails between retracted operating positions whereat the tool attachment is in an operating position in close proximity to the vehicle, and extended maintenance positions whereat the tool attachment is shifted upward and outwardly from the vehicle frame for providing access to the tool attachment, means for ensuring synchronous movement of said bars, wherein said means for ensuring synchronous movement of the bars further comprises: a plurality of wheels in engagement with respective bars, a shaft supported by the vehicle and to which the wheels are fixed, said wheels and shaft rotate in unison to synchronize the shifting of the bars with respect to the rails, wherein the wheels include gear teeth which engage toothed racks on the respective bars. 11. A vehicle comprising: a vehicle frame, a plurality of elongate rail members mounted with the vehicle frame and oriented at an angle to a surface of the ground, a tool frame to which is coupled a tool attachment, said tool frame having a plurality of bars oriented in alignment with the rail members and shiftably supported by respective rails and linearly shiftable in operative engagement with said rails between retracted operating positions whereat the tool attachment is in an operating position in close proximity to the vehicle, and extended maintenance positions whereat the tool attachment is shifted upward and outwardly from the vehicle frame for providing access to the tool attachment, means for ensuring synchronous movement of said bars, wherein said tool attachments are mower units. d first and second compression mechanisms are located at opposite ends of said motor compartment. 4. A two stage hermetic compressor for compressing carbon dioxide refrigerant received therein substantially at a suction pressure and discharged therefrom substantially at a discharge pressure, comprising: a housing including at least two compartments, one of said compartments containing discharge pressure carbon dioxide gas and one of said compartments containing carbon dioxide gas at a pressure intermediate the suction and discharge pressures; a first compression mechanism located in said housing, suction pressure gas being compressed to pressure intermediate the suction and discharge pressures in said first compression mechanism; a motor disposed in said intermediate pressure gas compartment; a second compression mechanism disposed in said discharge pressure gas compartment, gas at a pressure intermediate the suction and discharge pressures being compressed to discharge pressure in said second compression mechanism; and a drive shaft operatively coupling said motor and said first and second compression mechanisms wherein said drive shaft comprises a first drive shaft and a second drive shaft, said first and second drive shafts being rotatably secured to one another, said first drive shaft operatively engaging said first compression mechanism, said second drive shaft operatively engaging said second compression mechanism. 5. The compressor of claim 1, wherein said housing further comprises a longitudinal motor housing, a first compression mechanism housing, and a second compression mechanism housing, said first and second compression mechanism housings secured to opposite ends of said motor housing. 6. The compressor of claim 5, wherein said discharge pressure gas compartment, said intermediate pressure gas compartment, and said suction pressure gas compartment are defined within said second compression mechanism housing, said motor housing, and said first compression mechanism housing, respectively. 7. The compressor of claim 1, further comprising an inlet port located between said motor housing and said second stage compression mechanism. 8. The compressor of claim 7, further comprising a baffle mounted over said inlet port, whereby oil entrained in gas in said motor housing is separated from the gas by said baffle and is prevented from entering said port. 9. The compressor of claim 8, wherein said baffle is substantially conically shaped. 10. A two stage hermetic compressor for compressing carbon dioxide refrigerant received therein comprising: a first module having a motor mounted therein, said first module having first and second ends; a second module having a compression mechanism mounted therein, said second module mounted to said first end of said first module, said motor and said second module compression mechanism operatively coupled via a drive shaft; and a third module having a compression mechanism mounted therein, said third module mounted to said second end of said first module, said motor and said third module compression mechanism operatively coupled by said drive shaft. 11. The compressor of claim 10, wherein carbon dioxide refrigerant substantially at a suction pressure enters the compressor and is discharged therefrom substantially at a discharge pressure. 12. The compressor of claim 11, wherein suction pressure carbon dioxide gas is compressed to a pressure intermediate said suction and discharge pressures in said second module, said intermediate pressure gas exiting said second module and entering said first module. 13. The compressor of claim 12, wherein said gas at a pressure intermediate said suction and discharge pressures exits said first module and enters said third module, said intermediate pressure gas being compressed in said third module to substantially discharge pressure. 14. The compressor of claim 10, further comprising a baffle mounted in said first module, whereby oil entrai
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