Refrigeration – Automatic control – Selective heating or cooling
Patent
1994-09-09
1995-12-12
Wayner, William E.
Refrigeration
Automatic control
Selective heating or cooling
62 90, 62231, 623246, F25B 1300, F25B 1900
Patent
active
054739063
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 therebetween. A connecting condition of these elements is changed into one of a cooling, a first heating and a second 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 first 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 second 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.
patent: 5355690 (1994-10-01), Iritani et al.
patent: 5375427 (1994-12-01), Hara et al.
Hara Jun-ichiro
Matsuoka Takayoshi
Nissan Motor Co,. Ltd.
Wayner William E.
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