Refrigeration – Automatic control – Refrigeration producer
Patent
1994-11-07
1996-04-16
Tanner, Harry B.
Refrigeration
Automatic control
Refrigeration producer
622283, 62229, 62244, B60H 100
Patent
active
055071554
ABSTRACT:
An automobile air-conditioning system has a compressor driven by an electric motor, a main condenser for cooling which is provided outside a car-room, a subcondenser for heating which is provided in the car-room, an evaporator provided in the car-room and a changeover valve for switching refrigerant paths, and executes a heating operation and a cooling operation by switching refrigerant paths by the changeover valve. When an air-conditioning mode is a heating mode and a room temperature of the automobile is below a prescribed temperature, a revolution of the compressor is compensated by a first prescribed revolution pitch according to a discharge temperature of a refrigerant delivered from the compressor. When the air-conditioning mode is the heating mode and the room temperature of the automobile is above the prescribed temperature, the revolution of the compressor is compensated by a second prescribed revolution pitch which is larger than the first prescribed revolution pitch according to the discharge temperature of the refrigerant delivered from the compressor.
REFERENCES:
patent: 4257238 (1981-03-01), Kountz et al.
patent: 4667480 (1987-05-01), Bessler
patent: 4926653 (1990-05-01), Masuda et al.
patent: 5263335 (1993-11-01), Isono et al.
Tanner Harry B.
Zexel Corporation
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