Heat pump cycle
AssigneesNippon Soken, Inc., Denso Corporation
InventorsYukikatsu Ozaki, Tadashi Hotta, Motohiro Yamaguchi, Yasushi Yamanaka
Life of this patent
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Abstract
In a heat pump cycle, a first high-pressure side heat exchanger is disposed to perform a heat exchange between refrigerant discharged from a compressor and a first fluid, and a second high-pressure side heat exchanger is disposed to perform a heat exchanger between refrigerant from the first high-pressure side heat exchanger and a second fluid having a temperature lower than that of the first fluid. Accordingly, a heat quantity obtained from the heat pump cycle is the sum of a heat amount obtained from the first high-pressure side heat exchanger and a heat amount obtained from the second high-pressure side heat exchanger.
Claims12
A heat pump cycle comprising:
- a compressor for compressing refrigerant to a pressure higher than critical pressure of refrigerant;
- a first high-pressure side heat exchanger disposed to perform a heat exchange between refrigerant discharged from the compressor and a first fluid;
- a second high-pressure side heat exchanger disposed to perform a heat exchange between refrigerant flowing from the first high-pressure side heat exchanger and a second fluid having a temperature lower than that of the first fluid;
- a decompression unit for decompressing refrigerant flowing from the second high-pressure side heat exchanger, the decompression unit being disposed to control the pressure of refrigerant discharged from the compressor;
- a low-pressure side heat exchanger disposed to evaporate refrigerant decompressed in the decompression unit;
- a refrigerant temperature detecting device for detecting a refrigerant temperature between the first high-pressure side heat exchanger and the second high-pressure side heat exchanger,
- wherein the decompression unit controls the refrigerant pressure discharged from the compressor to become equal to or lower than a predetermined pressure, based on the refrigerant temperature between the first high-pressure side heat exchanger and the second high-pressure side heat exchanger.
Dependencies are inferred from the claim text.