Refrigeration cycle device
AssigneeDaikin Industries, Ltd.
InventorsEiji Kumakura, Ikuhiro Iwata, Kazuhiro Furusho, Ryusuke Fujiyoshi, Hiromune Matsuoka
Life of this patent
Estimating the term…
Abstract
At a refrigeration cycle device, an injection pipe and an economizer heat exchanger are provided at a main refrigerant circuit. In addition, the refrigeration cycle device includes a sub-refrigerant circuit having a sub-usage-side heat exchanger. At the refrigeration cycle device, the sub-usage-side heat exchanger functions as an evaporator of a sub-refrigerant and cools a main refrigerant that has been cooled at the economizer heat exchanger, or functions as a radiator of the sub-refrigerant and heats the main refrigerant that has been cooled at the economizer heat exchanger.
Claims12
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 selectively functions as a radiator and an evaporator of the main refrigerant,
- a main usage-side heat exchanger that selectively functions as an evaporator and a radiator of the main refrigerant,
- an injection pipe that causes the main refrigerant that flows between the main heat-source-side heat exchanger and the main usage-side heat exchanger to branch off and to be sent to the main compressor,
- an economizer heat exchanger that cools the main refrigerant that flows between the main heat-source-side heat exchanger and the main usage-side heat exchanger by heat exchange with the main refrigerant that flows in the injection pipe, 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,
- wherein the main refrigerant circuit has a sub-usage-side heat exchanger that selectively functions as a cooler and a heater of the main refrigerant that has been cooled at the economizer heat exchanger;
- and
- a sub-refrigerant circuit having
- a sub-compressor that compresses a sub-refrigerant,
- a sub-heat-source-side heat exchanger that selectively functions as a radiator and an evaporator of the sub-refrigerant,
- the sub-usage-side heat exchanger that selectively functions as an evaporator of the sub-refrigerant and cools the main refrigerant that has been cooled at the economizer heat exchanger, and selectively functions as a radiator of the sub-refrigerant and heats the main refrigerant that has been cooled at the economizer 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 flows in the order of the main compressor, the main heat-source-side heat exchanger, the economizer heat exchanger, the sub-usage-side heat exchanger and the main usage-side heat exchanger during the main cooling operation state.
Dependencies are inferred from the claim text.