Automatic expansion valve for a refrigeration circuit

Details Automatic expansion valve for a refrigeration circuit Automatic expansion valve for a refrigeration circuit

1988-03-21

1989-06-20

Tapolcai, William E.

Refrigeration

With vehicle feature

Occupant-type vehicle

62180, 62204, B60H 132

Patent

active

048400394

ABSTRACT:
An automotive air conditioning system having a refrigeration circuit including a compressor, a condenser, an expansion valve, an evaporator, and an accumulator disposed serially and respectively is disclosed. A fan controls the air flow volume of the evaporator in accordance with the operation of a transfer switch. The expansion valve includes two orifices and an actuator which opens and closes one orifice. The actuator is electrically controlled in response to the operation of the transfer switch. The transfer swith correspondingly controls both the air flow across the evaporator and the refrigerant flow through the expansion valve. Therefore, an accumulator having a small volume can be used the expansion valve construction is simple.

REFERENCES:
patent: 1984054 (1934-12-01), Carraway
patent: 3121315 (1964-02-01), Matthies
patent: 3462965 (1969-05-01), Miner
patent: 3786651 (1974-01-01), Eschbaugh et al.

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