Gas injection type heat pump apparatus

Details Gas injection type heat pump apparatus Gas injection type heat pump apparatus

1997-07-08

1998-07-14

Tanner, Harry B.

Refrigeration

Automatic control

Selective heating or cooling

62180, 62184, 62186, F25B 1300

Patent

active

057786917

ABSTRACT:
According to the present invention, in a gas injection type heat pump apparatus, the high-pressure side pressure of refrigeration cycle is detected in a heating operation, and an upper limit value of an amount of air passing through an inside heat exchanger is determined based on the detection value. The upper limit value and a set air amount set by an air amount switching lever are compared. When the set air amount is larger than the upper limit value, the amount of the air passing through the inside heat exchanger is restricted within the upper limit value. In this way, the high-pressure side pressure increases, and an intermediate pressure in a gas-liquid separator also increases. Therefore, the gas injection amount can be increased, and a heating capacity can be effectively improved.

REFERENCES:
patent: 5181392 (1993-01-01), Itoh et al.
patent: 5533352 (1996-07-01), Bahel et al.
patent: 5634348 (1997-06-01), Ikeda et al.

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