Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Fuminori Sakima

Shigehiro Sato

Akira Fujitaka

Hiroaki Nakai

Kenji Takaichi

Masaru Matsui

Yoshikazu Kawabe

Hiroshi Hasegawa

Atsuo Okaichi

Atsushi Sakuda

Takeshi Ogata

Osamu Ogawa

Yasufumi Takahashi

Fumitoshi Nishiwaki

Osamu Kosuda

Masanobu Wada

Hidetoshi Taguchi

Ko Inagaki

Hideaki Matsuo

Akihiro Kyogoku

Yoko Sugamoto

Takuya Okumura

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.

Provided is a reciprocating compressor having a structure in which friction losses between a shaft and a bearing can be reduced without impairing the ability of the bearing to support the shaft. A reciprocating compressor () includes a cylinder (), a piston (), a connecting rod (), a shaft (), and a bearing (). The shaft () has a journal portion () as a portion covered by the bearing (). The journal portion () has a first journal portion () located closer to the connecting rod () with respect to a midpoint M of the journal portion () in a direction parallel to a rotational axis and a second journal portion () located farther from the connecting rod () with respect to the midpoint M. The bearing () has a first sliding portion () for supporting the first journal portion () and a second sliding portion () for supporting the second journal portion (). The first sliding portion () has a first recessed portion () in at least one range selected from a range of 0&#xb0; to 180&#xb0; and a range of 270&#xb0; to 360&#xb0; in a rotational direction of the shaft () from a reference position.

Reciprocating compressor

A compressor () includes a closed casing (), a compression mechanism (), a motor () and an oil separating member (A). The oil separating member (A) rotates together with a shaft (). The oil separating member (A) has a peripheral wall () and a bottom wall () that form a recess (). An inlet of a discharge pipe () penetrating the closed casing () is located in the recess (). A plurality of oil expelling ports () are provided in the peripheral wall () of the oil separating member (A) so as to be scattered.

Compressor

An expander-compressor unit () includes: a closed casing () holding an oil at a bottom portion thereof; a motor () provided in the closed casing (); a compression mechanism () for compressing a refrigerant and discharging it into the closed casing (), the compression mechanism () being disposed below the motor () in the closed casing (); an expansion mechanism () disposed below the compression mechanism () in the closed casing (); and a coupling mechanism () for coupling a compression mechanism side shaft () to an expansion mechanism side shaft (). An oil supply passage () for supplying the oil to the compression mechanism () is formed in the compression mechanism side shaft (). An oil suction port (A) is provided in a portion of the compression mechanism side shaft (), the portion being above the expansion mechanism ().

Expander-compressor unit and refrigeration cycle apparatus having the same

A refrigeration cycle apparatusincludes a refrigerant circuit in which a refrigerant circulates. The refrigerant circuit is formed by connecting in sequence a compressorfor compressing the refrigerant, a radiatorfor allowing the refrigerant compressed by compressorto radiate heat, a fluid pressure motoras a power recovery means, and an evaporatorfor allowing the refrigerant discharged by the fluid pressure motorto evaporate. The fluid pressure motorperforms a process for drawing the refrigerant and a process for discharging the refrigerant. These processes are performed substantially continuously.

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Shiga, Japan

Fuminori Sakima