Refrigeration – Automatic control – Of external fluid reheating
Patent
1993-04-20
1994-07-26
Wayner, William E.
Refrigeration
Automatic control
Of external fluid reheating
621964, 62243, 454 93, F25B 2900
Patent
active
053318234
ABSTRACT:
A heat pump type air conditioner for an automotive vehicle has a compressor to which an outer heat exchanger and a heat-radiating inner heat exchanger are connected through a three-way valve. The heat-radiating inner heat exchanger is connected to a heat-absorbing inner heat exchanger through an expansion valve. The heat-absorbing inner heat exchanger is connected to the compressor. During a cooling operation the three-way valve is set to lead the refrigerant from the compressor to the outer heat exchanger. During a heating operation the three-way valve is set to lead the refrigerant from the compressor to the heat-radiating inner heat exchanger while bypassing the outer heat exchanger. The three-way valve is switched by a switching means when a target conditioned-air temperature, which is determined according to thermal information of the automotive vehicle, generally corresponds to a temperature at which clouding of windows is not caused by the relationship between a compartment temperature and an ambient temperature. Accordingly, the cooling and heating operations are stably implemented without being effected by various conditions, and the clouding of the windows is securely prevented while electric power consumption is deceased.
REFERENCES:
patent: 3738117 (1973-06-01), Engel
patent: 3798920 (1974-03-01), Morgan
patent: 5156204 (1992-10-01), Doi
Nissan Motor Co, Ltd.
Wayner William E.
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