Air conditioner for vehicle

Details Air conditioner for vehicle Air conditioner for vehicle

1994-01-24

1994-12-27

Wayner, William E.

Refrigeration

Automatic control

Selective heating or cooling

62 90, 623246, F25B 1300

Patent

active

053754271

ABSTRACT:
An air conditioner for a vehicle having a compressor, an outer heat exchanger, a heat-radiating inner heat exchanger an expansion valve, a heat-absorbing inner heat exchanger which are connected thereamong. A connecting condition of these elements is changed into one of a cooling, a heating and a weak heating, by controlling a refrigerant passage switching device. During the cooling, refrigerant in the air conditioner is circulated in the order of at least the outer heat exchanger, the expansion valve, the heat-absorbing inner heat exchanger and the compressor. During the heating the refrigerant is circulated in the order of the heat-radiating inner heat exchanger, the expansion valve, the heat-absorbing inner heat exchanger and the compressor while bypassing the outer heat exchanger. During the weak heating, the refrigerant is circulated in the order of the heat-radiating inner heat exchanger, the expansion valve, at least the outer heat exchanger and the compressor. Therefore, it becomes possible to implement a heating operation in a wide-range from an intensely cold condition to a slightly cool condition while saving an energy consumption.

REFERENCES:
patent: 3798920 (1974-03-01), Morgan
patent: 5277034 (1994-01-01), Hodo et al.
patent: 5299431 (1994-04-01), Iritani et al.

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