Refrigeration – Automatic control – Selective heating or cooling
Patent
1994-06-03
1998-01-13
Ford, John K.
Refrigeration
Automatic control
Selective heating or cooling
62180, 621964, 62 90, 62503, 621765, 62173, 165240, F25B 2900, F25B 4100, F25B 1300
Patent
active
057066647
ABSTRACT:
A heat pump type air conditioner for an automotive vehicle includes a vapor-compression refrigeration system which is provided with a compressor. An outer condenser and an inner condenser are serially connected to the compressor through a three-way valve. A bypass passage of the outer condenser communicates the compressor and the inner condenser through the three-way valve. The inner condenser is connected to an inner evaporator through an expansion valve. A refrigerant heater for heating refrigerant of the system is disposed upstream and/or downstream of the inner evaporator. The refrigerant heater is controllably operated by a control unit according to a refrigerant condition indicative signal from a refrigerant condition detector. Therefore, the air conditioner generates a sufficient heating performance even just after the start of an engine of the automotive vehicle while realizing a dehumidifying heating.
REFERENCES:
patent: 3636723 (1972-01-01), Kramer
patent: 4761964 (1988-08-01), Pacheco
patent: 5299431 (1994-04-01), Iritani et al.
patent: 5355689 (1994-10-01), Hara et al.
patent: 5375427 (1994-12-01), Hara et al.
patent: 5419149 (1995-05-01), Hara et al.
Ford John K.
Nissan Motor Co,. Ltd.
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