Heat pump device

Details Heat pump device Heat pump device

2005-04-19

2005-04-19

Jiang, Chen Wen (Department: 3744)

Refrigeration

Disparate apparatus utilized as heat source or absorber

C062S278000

Reexamination Certificate

active

06880352

ABSTRACT:
In a heat pump apparatus having a refrigerating cycle including a compressor1, a gas cooler3, a pressure reducing device5and an evaporator7in which water can be heated by the gas cooler, the compressor1comprises a two-stage compression type compressor for leading all or a part of refrigerant compressed to an intermediate pressure at a first stage through a shell case11to a second stage, compressing the intermediate-pressure refrigerant to a high pressure at a second stage and discharging the high-pressure refrigerant, and there is equipped a defrosting circuit33for leading the intermediate-pressure refrigerant of the first stage of the compressor1to the evaporator7with bypassing the gas cooler3and the pressure reducing device5.

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