Refrigeration cycle device
AssigneeDaikin Industries, Ltd.
InventorsIkuhiro IWATA, Eiji KUMAKURA, Kazuhiro FURUSHO, Ryusuke FUJIYOSHI, Hiromune MATSUOKA
Life of this patent
Estimating the term…
Abstract
A refrigeration cycle device that includes a main refrigerant circuit and a sub-refrigerant circuit cools or heats a main refrigerant that flows between a main heat-source-side heat exchanger and a main usage-side heat exchanger by causing a sub-usage-side heat exchanger to function as an evaporator or a radiator of a sub-refrigerant. A first main expansion mechanism and a second main expansion mechanism that decompress the main refrigerant are provided on an upstream side and a downstream side of the sub-usage-side heat exchanger of the main refrigerant circuit.
Claims20
A refrigeration cycle device comprising:
- a main refrigerant circuit having
- a main compressor that compresses a main refrigerant,
- a main heat-source-side heat exchanger that functions as a radiator or an evaporator of the main refrigerant,
- a main usage-side heat exchanger that functions as an evaporator or a radiator of the main refrigerant,
- a sub-usage-side heat exchanger that functions as a cooler or a heater of the main refrigerant that flows between the main heat-source-side heat exchanger and the main usage-side heat exchanger, and
- a main flow-path switching mechanism that switches between a main cooling operation state, in which the main refrigerant is caused to circulate so that the main usage-side heat exchanger functions as the evaporator of the main refrigerant, and a main heating operation state, in which the main refrigerant is caused to circulate so that the main usage-side heat exchanger functions as the radiator of the main refrigerant;
- and
- a sub-refrigerant circuit having
- a sub-compressor that compresses a sub-refrigerant,
- a sub-heat-source-side heat exchanger that functions as a radiator or an evaporator of the sub-refrigerant,
- the sub-usage-side heat exchanger that functions as an evaporator of the sub-refrigerant and cools the main refrigerant that flows between the main heat-source-side heat exchanger and the main usage-side heat exchanger, or functions as a radiator of the sub-refrigerant and heats the main refrigerant that flows between the main usage-side heat exchanger and the main heat-source-side heat exchanger, and
- a sub-flow-path switching mechanism that switches between a sub-cooling operation state, in which the sub-refrigerant is caused to circulate so that the sub-usage-side heat exchanger functions as the evaporator of the sub-refrigerant, and a sub-heating operation state, in which the sub-refrigerant is caused to circulate so that the sub-usage-side heat exchanger functions as the radiator of the sub-refrigerant,
- wherein
- the main refrigerant circuit has a first main expansion mechanism that decompresses the main refrigerant that flows between one of the main heat-source-side heat exchanger and the main usage-side heat exchanger and the sub-usage-side heat exchanger, and a second main expansion mechanism that decompresses the main refrigerant that flows between the sub-usage-side heat exchanger and the other of the main heat-source-side heat exchanger and the main usage-side heat exchanger.
Dependencies are inferred from the claim text.