Refrigeration cycle device using working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32)
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsFuminori Sakima, Akira Fujitaka, Shigehiro Sato, Kenji Takaichi, Yoshikazu Kawabe, Hiroaki Nakai
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Abstract
A refrigeration cycle device includes a refrigeration cycle formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other. As a refrigerant in the refrigeration cycle, a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used. A degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor.
Claims6
A refrigeration cycle device comprising a refrigeration cycle which is formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other,
- wherein
- a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used as a refrigerant sealed in the refrigeration cycle, and
- a degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor,
- the refrigeration cycle device further comprising:
- a bypass flow passage which connects a portion disposed between the condenser and the expansion valve and a portion disposed between the expansion valve and the evaporator to each other;
- and a bypass open/close valve for opening or closing the bypass flow passage,
- wherein the bypass open/close valve is configured to be opened when the refrigerant does not have two phases at the suction portion of the compressor in a state where the degree of opening of the expansion valve becomes full-open.
A refrigeration cycle device comprising a refrigeration cycle which is formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other,
- wherein
- a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used as a refrigerant sealed in the refrigeration cycle,
- a degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor, and
- the compressor is configured to be stopped when the refrigerant does not have two phases at the suction portion of the compressor in a state where the degree of opening of the expansion valve becomes full-open.
A refrigeration cycle device comprising a refrigeration cycle which is formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other,
- wherein
- a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used as a refrigerant sealed in the refrigeration cycle, and
- a degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor,
- the refrigeration cycle device further comprising a relief valve which communicates with a space outside the refrigeration cycle,
- wherein the relief valve is configured to be opened when the refrigerant does not have two phases at the suction portion of the compressor in a state where the degree of opening of the expansion valve becomes full-open.
A refrigeration cycle device comprising a refrigeration cycle which is formed by connecting a compressor, a condenser, an expansion valve and an evaporator to each other,
- wherein
- a working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32) is used as a refrigerant sealed in the refrigeration cycle,
- a degree of opening of the expansion valve is controlled such that the refrigerant has two phases at a suction portion of the compressor, and
- the compressor includes an electric motor, and supply of electricity to the compressor is stopped for suppressing a disproportionation reaction of the refrigerant when abnormal heat generation having a higher temperature than a predetermined value occurs in the electric motor,
- the refrigeration cycle device further comprising a four-way valve which switches a flow of a refrigerant discharged from the compressor,
- wherein when a determination is made that the abnormal heat generation occurs, communication of the four-way valve is switched to a direction opposite to a direction before the occurrence of the abnormal heat generation.
Dependencies are inferred from the claim text.