Mitsubishi Denki Kabushiki Kaisha

Takashi Sebata

Kiyoharu Ikeda

Yoshihide Ogawa

Takeshi Fushiki

Fumiaki Sano

Teruhiko Nishiki

Shin Sekiya

Minoru Ishii

Masao Tani

Yasuhiro Suzuki

Hiroshi Ogawa

Susumu Kawaguchi

Wataru Izumisawa

On the assumption that pressure Pm (MPa) of a boss portion outside space determined by a restrictor and a flow regulating valve provided midway in an oil feed passageway is expressed by Pm &equals;Ps&plus;&agr;, and a differential pressure value at which a difference between high and low pressures becomes minimum in a running pressure range of a scroll compressor is represented by min(Pd&minus;Ps), the value a in the above expression is set to fall in a range expressed by 0<&agr;<min(Pd&minus;Ps). Here, Ps represents suction pressure (MPa) of the compressor, and Pd represents discharge pressure (MPa) of the compressor.

Scroll compressor

A compressor includes a compression mechanism part for compressing refrigerant sucked from an outside of the hermetic container and discharging compressed refrigerant to a discharge space, an electric motor part composed of a stator and a rotor, facing a first space which is at an opposite side of the discharge space with respect to the compression mechanism part in the hermetic container, for driving the compression mechanism part through a main shaft, a passage at an external circumferential side of the compression mechanism part, for connecting the discharge space with the first space, and a fan provided at an end of the rotor, facing the first space. The refrigerant discharged into the discharge space passes through the passage at the external circumferential side of the compression mechanism part to reach the first space, and passes the fan to be discharged to the outside of the hermetic container.

Compressor

A scroll compressor including a guide frame ( ) for fixing a fixed scroll member ( ) and a compliant frame ( ) for supporting an oscillating scroll member ( ) in the axial direction of the scroll compressor in the guide frame ( ), wherein the guide frame ( ) has a plurality of cylindrical surfaces ( ), and the compliant frame ( ) has a plurality of cylindrical surfaces ( ) which engage with the cylindrical surfaces ( ), and wherein in order to facilitate assembling of the guide frame ( ) and the compliant frame ( ), the first cylindrical surfaces ( ) are first engaged with each other when the compliant frame ( ) is inserted into the guide frame ( ), that is, the cylindrical surfaces are engaged in the order of increase in diameter.

Scroll compressor including guide frame and compliant frame

A structure is provided that prevents excessive force from acting on a fastening portion where a guide frame is fastened to a sealed container. A fastening position of the guide frame and sealed structure is set within a range bounded by an upper meshing circumferential inner surface of the guide frame together with an upper meshing circumferential outer surface of a compliant frame and a lower meshing circumferential inner surface of the guide frame together with a lower meshing circumferential outer surface of the compliant frame.

According to a scroll compressor of the present invention, at least one of a diameter space between an upper fitting surface of the guide frame and an upper fitting surface of the compliant frame at an upper fitting part where the upper fitting surface of the guide frame contacts with the upper fitting surface of the compliant frame, and a diameter space between a lower fitting surface of the guide frame and a lower fitting surface of the compliant frame at a lower fitting part where the lower fitting surface of the guide frame contacts with the lower fitting surface of the compliant frame is set to be equal to or shorter than a diameter space between the rotor and the stator.

Scroll compressor having a compliant frame and a guide frame for the orbiting scroll

A scroll compressor comprising a fixed scroll, a rotating scroll, a compliant frame for supporting the rotating scroll in an axial direction and a main shaft for driving the rotating scroll in directions of radiuses of the rotating scroll, and a guide frame fixed to a hermetically sealed vessel for supporting the compliant frame in the directions of its radiuses, wherein the rotating scroll is slidable in the axial direction by sliding of the compliant frame on the guide frame; a space is formed between the compliant frame and the guide frame; and a pressure in the space is made to be a pressure higher than a suction pressure and the same as a discharge pressure or less, whereby relief of the rotating scroll is avoidable to quickly and constantly realize a state of normal operation.

Growing community of inventors

Tokyo, Japan

Takashi Sebata