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US 12,339,026 B2Granted
Air-conditioner
AssigneeHitachi-Johnson Controls Air Conditioning, Inc.
InventorMikihito Tokudi
Life of this patent
Estimating the term…
Abstract
An air-conditioner including a main refrigerant circuit having a compressor, a heat-source-side heat exchanger, an expansion valve, and a utilization-side heat exchanger, a bypass path, another expansion valve that decompresses refrigerant flowing in the bypass path, an internal heat exchanger, an opening degree adjuster, and a setter that sets the target temperature difference on the basis of the degree of subcooling of the utilization-side heat exchanger.
Claims5
An air-conditioner comprising:
- a main refrigerant circuit including a compressor, a heat-source-side heat exchanger, a first expansion valve, and a utilization-side heat exchanger;
- a bypass path that allows part of refrigerant flowing from the utilization-side heat exchanger to the heat-source-side heat exchanger to join refrigerant compressed to an intermediate pressure by the compressor;
- a second expansion valve that decompresses refrigerant flowing in the bypass path;
- an internal heat exchanger that provides heat of refrigerant flowing from the utilization-side heat exchanger to the heat-source-side heat exchanger in the main refrigerant circuit to refrigerant decompressed in the bypass path;
- an opening degree adjuster that adjusts, in heating operation, a degree of opening of the second expansion valve on the basis of a refrigerant temperature difference between an outlet and an inlet of the internal heat exchanger in the bypass path and a target temperature difference;
- and
- a setter that sets the target temperature difference on the basis of a degree of subcooling of the utilization-side heat exchanger.
4 more elements
Dependencies are inferred from the claim text.