Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Mitsubishi Chemical Industries Limited

Takeshi Fushiki

Kiyoharu Ikeda

Yoshihide Ogawa

Takashi Sebata

Taro Kato

Shin Sekiya

Fumiaki Sano

Teruhiko Nishiki

Masao Tani

Hideaki Maeyama

Fumihiko Ishizono

Raito Kawamura

Minoru Ishii

Tetsuhide Yokoyama

Kei Sasaki

Atsuyoshi Fukaya

Koichi Sato

Yasuhiro Suzuki

Hiroshi Ogawa

Masaki Okada

Toshihide Koda

Susumu Kawaguchi

Toshiaki Iwasaki

Shoichiro Hara

Mitsuru Awata

Mitsuo Uchida

Wataru Izumisawa

Satoru Kawakami

Tohru Tagawa

A scroll compressor has an electric motor portion, a compression mechanism portion connected to the electric motor portion, and an oil sump for lubricating oil in a sealed container and compresses a refrigerant in the compression mechanism portion. A used refrigerant is a halogenated hydrocarbon or a hydrocarbon having a carbon double bond in the composition or is a mixture containing one of the same. A sliding surface of at least one of two components constituting a sliding portion having a relation of sliding to each other in a sealed container is structured in such a way that an iron metal or an aluminum metal is not directly exposed.

Scroll compressor

A device that enhances compressor efficiency by reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed by a compression unit. A low-stage discharge muffler space is formed in the shape of a ring around a drive shaft. In the low-stage discharge muffler space, a communication port flow guide is provided so as to cover a predetermined area of an opening of a communication port from a side of a flow path in a reverse direction out of two flow paths in different directions around the drive shaft from a discharge port through which is discharged the refrigerant compressed by a low-stage compression unit to the communication port through which the refrigerant flows out. The communication port flow guide transforms a direction of a flow into a direction of a connecting flow path.

Refrigerant compressor and heat pump apparatus

A refrigerant compressor that enhances compressor efficiency by both reducing an amplitude of pressure pulsations and reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed at a compression unit. A low-stage discharge muffler space is formed in the shape of a ring around a drive shaft. In the low-stage discharge muffler space, a discharge port rear guide is provided in the proximity of a discharge port through which is discharged the refrigerant compressed by a low-stage compression unit. The discharge port rear guide is provided at a flow path in one direction out of two flow paths from the discharge port to a communication port in different directions around the drive shaft, and prevents the refrigerant from flowing in that direction, thereby causing the refrigerant to circulate in a forward direction in the ring-shaped discharge muffler space.

There is provided a high performance compressor that causes no possibility of mixing foreign materials or of leaking refrigerant, that reduces strain otherwise generated in a compressor mechanism section and that is highly reliable even for a long-term use. The compressor mechanism section in which pairs of prepared holes are formed at a plurality of points on an outer peripheral face thereof is disposed within the closed container. Caulking punches are positioned to positions corresponding to those of the prepared holes and a region including the corresponding positions is heated. Then, when the punches are driven by pressing machines, portions of the container wall of the closed container plastically deform as the convex portions and enter the prepared holes. When the container wall cools down, the pair of convex portions of the container clamps a part between the prepared holes.

Compressor including attached compressor container

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.

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.

Water-repellent adhesive composition for wooden material which consists essentially of a paraffin emulsion and a resin material selected from the group consisting of urea resin, urea-melamine resin, and phenol resin, wherein said paraffin emulsion contains oxidized paraffin.

Water repellent adhesive composition for wooden material

A molded gypsum product comprises a matrix of crystalline gypsum and reinforcing fibers of glass fiber and asbestos fiber uniformly distributed in said matrix in a multi-layer structure having at least one higher density layer and at least one lower density layer which is continuously adjacent to said higher density layer and having an average apparent bulk density of 0.3 to 0.9 g/cc.

Growing community of inventors

Tokyo, Japan

Takeshi Fushiki