Title:
REFRIGERATION CYCLE DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/249289
Kind Code:
A1
Abstract:
This refrigeration cycle device comprises: a control unit; a compressor that compresses a refrigerant from a first pressure to a second pressure higher than the first pressure; a condenser that performs heat exchange between the refrigerant discharged from the compressor and air; an INJ branching part which branches, into a first refrigerant and a second refrigerant, the refrigerant that has flowed out from the compressor; an expansion valve which expands the first refrigerant branched by the INJ branching part and decompresses the first refrigerant to the first pressure; an evaporator which performs heat exchange between the first refrigerant that has flowed out from the expansion valve and air, the evaporator causing the first refrigerant of the first pressure to flow out toward the compressor; and an injection circuit which is connected between the INJ branching part and the compressor, and causes the second refrigerant branched by the INJ branching part to flow out toward the compressor, wherein the injection circuit includes an INJ expansion valve which expands the second refrigerant and decompresses the second refrigerant to an intermediate pressure higher than the first pressure but lower than the second pressure, and a receiver which stores the second refrigerant that has flowed out from the INJ expansion valve and causes the second refrigerant of the intermediate pressure to flow out toward the compressor, and the control unit controls at least one among the rotation speed of the compressor and the opening degree of the INJ expansion valve to control the intermediate pressure, which is the internal pressure of the receiver, so as to be a first threshold value or lower, or to control the intermediate pressure to be constant within a first range.
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Inventors:
ISHIKAWA TOMOTAKA (JP)
ARII YUSUKE (JP)
UEDA KOHEI (JP)
HAYASAKA MOTOSHI (JP)
ARII YUSUKE (JP)
UEDA KOHEI (JP)
HAYASAKA MOTOSHI (JP)
Application Number:
PCT/JP2021/019830
Publication Date:
December 01, 2022
Filing Date:
May 25, 2021
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B1/00; F25B1/10
Domestic Patent References:
| WO2021048899A1 | 2021-03-18 | |||
| WO2020208752A1 | 2020-10-15 |
Foreign References:
| JP2018036016A | 2018-03-08 | |||
| JP2018009767A | 2018-01-18 | |||
| JP2018132223A | 2018-08-23 | |||
| JP2012088040A | 2012-05-10 | |||
| JP2018021732A | 2018-02-08 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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