Panasonic Intellectual Property Management Co., Ltd.

Kenji Takaichi

Atsushi Sakuda

Akira Hiwata

Shigehiro Sato

Akira Fujitaka

Hiroaki Nakai

Fuminori Sakima

Yoshikazu Kawabe

Hideaki Matsuo

Masaaki Nagai

Akihiro Kyogoku

Kazuhiko Marumoto

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.

Refrigeration cycle device using working fluid containing 1,1,2-trifluoroethylene (R1123) and difluoromethane (R32)

The present invention includes a refrigeration cycle circuit that includes compressor, indoor heat exchanger, expansion valve, and outdoor heat exchanger that are connected to each other. A working fluid containing R1123 (1,1,2-trifluoroethylene) and R32 (difluoromethane) is used as a refrigerant sealed in the refrigeration cycle circuit, and an electric motor driving device that drives an electric motor of compressor includes a rotational speed estimator. The rotational speed estimator estimates rotational speed based on information on a detection value of an electric current input to the electric motor or a magnetic pole position of a rotor that constitutes the electric motor.

Refrigeration cycle device with motor speed estimator

A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyol ester oil as a compressor lubricating oil. In addition, a fixed scroll and a revolving scroll each having a spiral lap rising from an end plate, and a compression chamber which is formed by meshing the fixed scroll and the revolving scroll, are provided. In addition, a discharge hole which is provided at a center position of the end plate of the fixed scroll, and is open to a discharge chamber, a bypass hole which is provided in the end plate of the fixed scroll, and communicates with the compression chamber and the discharge chamber at a timing different from a timing at which the compression chamber communicates with the discharge hole, and a check valve which is provided in the bypass hole, and allows a flow from the compression chamber side to the discharge chamber side.

Compressor and refrigeration cycle device using same

A compressor uses a refrigerant containing R1123 (1,1,2-trifluoroethylene) as a working fluid, and uses a polyvinyl ether oil as a compressor lubricating oil. In addition, a fixed scroll () and a revolving scroll () each having a spiral lap rising from an end plate, and a compression chamber () which is formed by meshing the fixed scroll () and the revolving scroll (), are provided. In addition, a discharge hole () which is provided at a center position of the end plate of the fixed scroll (), and is open to a discharge chamber (), a bypass hole () which is provided in the end plate of the fixed scroll (), and communicates with the compression chamber () and the discharge chamber () at a timing different from a timing at which the compression chamber () communicates with the discharge hole (), and a check valve which is provided in the bypass hole (), and allows a flow from the compression chamber () side to the discharge chamber () side.

Use of a double bond-containing hydrofluoroolefin refrigerant causes a problem that it generates hydrogen fluoride by cleavage and decomposition under influence of oxygen, leading to degradation of the materials and the refrigeration oil used in the refrigeration apparatus and causing troubles in the refrigeration apparatus. It is possible to provide a high-reliability longer-lasting refrigeration apparatus by inexpensive method, by using a double bond-containing hydrofluoroolefin refrigerant in a refrigerating cycle having a refrigerant circulation route extending from a compressor, via a condenser, an expansion mechanism, and an evaporator, back to the compressorthat contains an ester-based refrigeration oil containing an unsaturated fatty acid as a constituent fatty acid.

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Osaka, Japan

Kenji Takaichi