HEAT PUMP CYCLE
First Claim
1. A heat pump cycle, comprising:
- a compressor that sucks and compresses a low-pressure refrigerant to supply a high-pressure refrigerant;
a use-side heat exchanger to which the high-pressure refrigerant is supplied and a heat is supplied from the high-pressure refrigerant in a heating use;
a decompressor that decompresses the high-pressure refrigerant to supply the low-pressure refrigerant in the heating use;
an exterior heat exchanger including an air passage to allow an air to flow therein, and low-temperature medium tubes that conduct a heat exchange between the air and the low-pressure refrigerant and allow the low-pressure refrigerant to absorb a heat in the heating use; and
an auxiliary heat exchanger that is arranged adjacent to the exterior heat exchanger, the auxiliary heat exchanger including an air passage to allow the air to flow therein, and high-temperature medium tubes that supply a heat to the exterior heat exchanger in the heating use, the heat supplied from the high-temperature medium tubes to the exterior heat exchanger being obtained from the high-temperature refrigerant which has been compressed by the compressor and is higher in temperature than the low-pressure refrigerant, whereinthe exterior heat exchanger and the auxiliary heat exchanger configure a first heat exchanger unit that is usable as an integrated unit,the low-temperature medium tubes and the high-temperature medium tubes are arranged to be thermally coupled with each other in at least a part of the first heat exchanger unit,the first heat exchanger unit includes an upstream row in which tubes are arranged in a line, and a downstream row in which tubes are arranged in a line on a downstream side of the upstream row in a flow direction of the air,the upstream row includes a group of the high-temperature medium tubes, and a group of the low-temperature medium tubes, andtubes of the group of the low-temperature medium tubes and tubes of the group of the high-temperature medium tubes are alternately arranged in at least a part of the upstream row.
1 Assignment
0 Petitions
Accused Products
Abstract
A heat pump cycle includes a refrigerant circuit and a coolant circuit. A first heat exchanger and a second heat exchanger are disposed between the refrigerant circuit and the coolant circuit. The first heat exchanger includes an exterior heat exchanger that functions as an evaporator in a heating operation, and a radiator for radiating heat of a coolant. The second heat exchanger transmits a heat of high-pressure refrigerant to the coolant in the heating operation. A temperature of refrigerant within the second heat exchanger is higher than a temperature of refrigerant within the first heat exchanger. The heat obtained from the second heat exchanger is supplied to the first heat exchanger through the coolant. Further, the heat obtained from the second heat exchanger is stored in the coolant. In defrosting operation, the coolant that has stored the heat therein is supplied to the first heat exchanger.
39 Citations
20 Claims
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1. A heat pump cycle, comprising:
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a compressor that sucks and compresses a low-pressure refrigerant to supply a high-pressure refrigerant; a use-side heat exchanger to which the high-pressure refrigerant is supplied and a heat is supplied from the high-pressure refrigerant in a heating use; a decompressor that decompresses the high-pressure refrigerant to supply the low-pressure refrigerant in the heating use; an exterior heat exchanger including an air passage to allow an air to flow therein, and low-temperature medium tubes that conduct a heat exchange between the air and the low-pressure refrigerant and allow the low-pressure refrigerant to absorb a heat in the heating use; and an auxiliary heat exchanger that is arranged adjacent to the exterior heat exchanger, the auxiliary heat exchanger including an air passage to allow the air to flow therein, and high-temperature medium tubes that supply a heat to the exterior heat exchanger in the heating use, the heat supplied from the high-temperature medium tubes to the exterior heat exchanger being obtained from the high-temperature refrigerant which has been compressed by the compressor and is higher in temperature than the low-pressure refrigerant, wherein the exterior heat exchanger and the auxiliary heat exchanger configure a first heat exchanger unit that is usable as an integrated unit, the low-temperature medium tubes and the high-temperature medium tubes are arranged to be thermally coupled with each other in at least a part of the first heat exchanger unit, the first heat exchanger unit includes an upstream row in which tubes are arranged in a line, and a downstream row in which tubes are arranged in a line on a downstream side of the upstream row in a flow direction of the air, the upstream row includes a group of the high-temperature medium tubes, and a group of the low-temperature medium tubes, and tubes of the group of the low-temperature medium tubes and tubes of the group of the high-temperature medium tubes are alternately arranged in at least a part of the upstream row. - View Dependent Claims (3, 4, 7, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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2. (canceled)
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5. (canceled)
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6. (canceled)
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8. (canceled)
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9. (canceled)
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10. (canceled)
Specification