Invention Grant
- Patent Title: Refrigeration cycle apparatus that injects refrigerant into compressor during low load operation
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Application No.: US17288093Application Date: 2019-01-07
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Publication No.: US11885548B2Publication Date: 2024-01-30
- Inventor: Toshiki Imanishi , Kohei Tatsuwaki
- Applicant: MITSUBISHI ELECTRIC CORPORATION
- Applicant Address: JP Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Tokyo
- Agency: POSZ LAW GROUP, PLC
- International Application: PCT/JP2019/000058 2019.01.07
- International Announcement: WO2020/144728A 2020.07.16
- Date entered country: 2021-04-23
- Main IPC: F25B41/42
- IPC: F25B41/42 ; F25B41/31 ; F25B49/02 ; F25B41/20 ; F25B1/04

Abstract:
A refrigeration cycle apparatus includes: a refrigeration cycle circuit in which a compressor, a condenser, a first expansion valve, and an evaporator are connected by refrigerant pipes; an injection pipe having a refrigerant inflow side end and a refrigerant outflow side end, the refrigerant inflow side being connected between the condenser and the first expansion valve, the refrigerant outflow side end being connected to a suction side of the compressor; a second expansion valve provided at the injection pipe; and a controller that controls a rotation speed of the compressor and an opening degree of the second expansion valve. In the case of reducing a heat-exchange capability of the evaporator when the rotation speed of the compressor is a specified rotation speed, the controller performs a low load operation during which refrigeration is caused to flow through the injection pipe.
Public/Granted literature
- US20210372680A1 REFRIGERATION CYCLE APPARATUS Public/Granted day:2021-12-02
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