Refrigeration – Automatic control – Refrigeration producer
Patent
1999-02-03
2000-10-31
Doerrler, William
Refrigeration
Automatic control
Refrigeration producer
62209, 62229, 236 91C, F25B 4900
Patent
active
061384682
ABSTRACT:
A variable displacement compressor in a refrigeration circuit using carbon dioxide refrigerant. The compressor changes the inclination of a swash plate located in a control chamber in accordance with the difference between the pressure in the control chamber and the pressure in a suction chamber thereby varying the compressor displacement. The compressor includes a control valve that adjusts the difference between the pressure in the control chamber and the pressure in the suction pressure. The control valve controls the flow rate of refrigerant supplied from the discharge chamber to the control chamber thereby adjusting the pressure difference. A controller inputs information from the outside of the refrigeration circuit. The outside information includes the outside temperature, the temperature of a passenger compartment and a target compartment temperature set by a temperature adjuster. The controller sets a target value of the pressure of refrigerant discharged from the compressor in accordance with the outside information. The controller then controls the current supplied to the control valve such that the target discharge pressure is rapidly reached. The compressor reduces unnecessary operation thereby reducing the power consumption and the load.
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Fujii Toshiro
Koide Tatsuya
Nakane Yoshiyuki
Yokomachi Naoya
Doerrler William
Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
Norman Marc
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