Heat pump device
AssigneeSanyo Electric Co., Ltd.
InventorsHaruhisa Yamasaki, Hiroshi Mukaiyama
Life of this patent
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Abstract
In a heat pump apparatus having a refrigerating cycle including a compressor 1, a gas cooler 3, a pressure reducing device 5 and an evaporator 7 in which water can be heated by the gas cooler, the compressor 1 comprises 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 case 11 to 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 circuit 33 for leading the intermediate-pressure refrigerant of the first stage of the compressor 1 to the evaporator 7 with bypassing the gas cooler 3 and the pressure reducing device 5.
Claims10
A heat pump apparatus having a refrigerating cycle including a compressor, a gas cooler, a pressure reducing device and an evaporator in which water can be heated by the gas cooler, characterized in that said compressor comprises 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 case to a second stage, compressing the intermediate-pressure refrigerant to a high pressure at a second stage and discharging the high-pressure refrigerant, and said heat pump apparatus includes a defrosting circuit for leading the intermediate-pressure refrigerant of the first stage of said compressor to said evaporator with bypassing said gas cooler and said pressure reducing device.
A heat pump apparatus having a refrigerating cycle including a compressor, a gas cooler, a pressure reducing device and an evaporator in which water can be heated by the gas cooler, characterized in that refrigerant that works in a supercritical area at a high pressure side is filled and used in said refrigerating cycle, said compressor comprises a two-stage compression type compressor for leading all or a part of refrigerant compressed to an intermediate pressure at a first stage through said shell case to a second stage, compressing the intermediate-pressure refrigerant to a high pressure at the second stage and discharging the high-pressure refrigerant, and said heat pump apparatus is equipped with a defrosting circuit for leading the intermediate-pressure refrigerant of the first stage of said compressor and/or the high-pressure refrigerant of the second stage to said evaporator with bypassing said gas cooler and said pressure reducing device.
Dependencies are inferred from the claim text.