Kabushiki Kaisha Toshiba

Makoto Hayano

Hirotsugu Sakata

Naoya Morozumi

Hitoshi Hattori

Shigemi Nagatomo

Masayuki Okuda

Mitsuo Hatori

Akira Morishima

Toshiya Yajima

Teruo Kobuna

Masao Ozu

Tsugio Itami

Isao Suzuki

Takayoshi Fujiwara

Takuya Hirayama

Takeshi Kumazawa

Moriaki Shimoda

Wataru Sakashita

Tsutomu Ichikawa

Kouichi Yoneyama

Tsukasa Chiyoya

Hiroaki Murasaki

Junji Sone

A fluid machinery is provided which comprises a stationary spiral having an inner engaging surface, and a moving spiral having an outer engaging surface which is engaged with the inner engaging surface and is rotated upon an axis line X relatively to the stationary spiral. A working chamber which rises spirally from an outer periphery to a center portion with a reduction in volume can be formed by engaging the outer engaging surface with the inner engaging surface, and the moving spiral can be pushed along the axis line X by use of gas pressure, etc.

Fluid machinery having stepped spirals with axial pushing means for the moving spiral

A helical-blade fluid machine maintains a low-pressure atmosphere in a closed casing ( ) and secures a proper lubrication state for a compression mechanism ( ). The fluid machine has a drive mechanism ( ) that is installed at an upper or lower part of the casing and consists of a stator ( ) and a rotor ( ). The compression mechanism is installed at the other part of the casing. The compression mechanism has a cylinder ( ) and a roller ( ), which is swayed with respect to the cylinder by the drive mechanism. A helical blade ( ) having unequal pitches is arranged on the roller, to define compression chambers ( ). This arrangement lowers the head of lubricant. An intake pipe ( ) feeds gas into the casing so that a low-pressure atmosphere fills the casing.

Helical-blade fluid machine

A helical blade type compressor comprising a case, a cylindrical cylinder provided in the case, a roller disposed in the cylinder, and helical blades of uneven pitches for dividing a compression chamber so that the volume may be gradually smaller in the axial direction between the cylinder and roller, by revolving the cylinder and roller to move the compression chamber in the volume decreasing direction, thereby compressing the air, wherein at least one seal member is provided in the roller for separating into pressure in the case and the pressure in the compression chamber.

Helical blade type compressor and a refrigeration cycle apparatus using the same

A helical-blade fluid machine maintains a low-pressure atmosphere in a closed casing (1) and secures a proper lubrication state for a compression mechanism (9). The fluid machine has a drive mechanism (7) that is installed at an upper or lower part of the casing and consists of a stator (11) and a rotor (15). The compression mechanism is installed at the other part of the casing. The compression mechanism has a cylinder (23) and a roller (25), which is swayed with respect to the cylinder by the drive mechanism. A helical blade (39) having unequal pitches is arranged on the roller, to define compression chambers (41). This arrangement lowers the head of lubricant. An intake pipe (5) feeds gas into the casing so that a low-pressure atmosphere fills the casing.

A fluid compressor comprises a rotary member, a cylinder, and a closed casing for receiving the rotary member and cylinder. The rotary member and cylinder are relatively turned so that a fluid is drawn into work chambers through a suction port, successively compressed and conveyed toward a discharge port through the work chambers, and discharged outside. The fluid compressor is provided with a control valve means. When pressure in the work chambers exceeds a predetermined value during the compressing process, the control valve releases the pressure through a discharge or suction end of the cylinder, or to the inside of the casing.

Fluid compressor

A scroll compressor comprises a first end member having an axis, a second end member facing the first end member, relatively movable crosswise of the first end member and having an axis, a bearing portion extending through either one of central portions of the first and second end members, a first scroll wrap formed in a vortical manner and extending from the face of the second scroll end member, the first scroll wrap having an inner end portion and an inner face, a second scroll wrap formed in a vortical manner and extending from the face of the second end member so as to interdigitate with the first end member, the second scroll wrap having an outer end portion and an inner face, a low gas pressure chamber and a high pressure chamber formed around or in the first and second end members, compressing chambers defined between the first and second scroll wraps, and engaging portions formed on the inner portions of the first and second scroll wraps and each having a guide face, the guide faces of the first and second scroll wraps being formed to remain contacted with the inner end portion of the first scroll wrap and the outer end of the second scroll wrap, respectively, and to guide the respective first and second scroll wraps such that the compressing chambers are moved to compress gas therein stronger during a compressing process of the scroll compressor.

Scroll compressor with distal ends of the wraps having sliding contact

A gas compressor comprises a fixed scroll member and a movable scroll member. A plurality of crescent working chambers are defined between the scroll members so that the volume of the working chambers varies when the scroll members are relatively moved. The compressor has a container which seals a power source and the scroll members and forms inner spaces therebetween. An intake port for drawing a gas from the exterior of the container into the working chambers is formed in the outer peripheral region of the fixed scroll member, and an axial port is formed in the inner region of the fixed scroll member so that the working chambers communicates therewith.

Scroll type fluid machine with passageway for innermost working chamber

A piston is eccentrically arranged in a cylinder along its axial direction and can be rotated relative to the cylinder. Part of the piston is in contact with the cylinder's inner surface. First and second helical grooves are formed in the piston's outer surface and separated at its central portion, the pitches of the grooves being gradually increased from both end portions to the center portion of the piston. First and second blades are inserted in first and second grooves so as to be moved in and out of the grooves with the outer edges of the blades contacting the inner surface. The blades partition a space between the cylinder and the piston into a plurality of operation chambers with volumes corresponding to the gradual pitch increases.

Helical blade type compressor with thrust loss compensation

A fluid compressor includes a cylinder and a columnar rotary rod. The rod is arranged in the cylinder so as to extend in the axial direction thereof and be eccentric thereto, and orbitable relative to the cylinder without rotation with respect to the cylinder while part of the rod is in contact with the inner circumferential surface of the cylinder. A spiral groove is formed on the outer circumference of the rod and a spiral blade is fitted in the groove. The space between the outer circumference surface of the rod and the inner circumference surface of the cylinder is divided by the blade into a plurality of operating chambers. The groove has an overall length larger than that of the blade by a predetermined length so that the blade is displaceable relative to the rod in the radial and circumferential directions of the rod without sliding on the inner circumferential of the cylinder.

A scroll member comprising a metallic end plate having a spiroidal groove on one side thereof, and a through-hole communicating with the groove, and a resin wrap joined to the groove of the end plate so as to protrude from the surface of the end plate. The wrap being formed by injection molding, and the through-hole and the groove being filled with part of the wrap.

Scroll member for use in a positive displacement device, and a method

A scroll compressor has a channel formed in a compressor member such as main shaft, frame, orbital scroll member, through which lubricating oil can pass easily from the higher pressure side to the lower pressure side under flow control between sliding surfaces of the compressor members without reduction in the sealing between the higher pressure side and the lower pressure side, whereby injecting sufficient lubricating oil between the scroll members improves both the sealing and the lubricating between the scroll members.

Scroll compressor with control of lubricant flow

In a scroll compressor, the side of the orbiting end plate away from the compression chambers is slidably supported by an annular protusion formed in the frame. A lower pressure chamber is formed on the radially outer side of this annular protrusion, and an Oldham's ring is fitted inside the lower pressure chamber.

Scroll compressor with lower and higher pressure chambers acting on the

In a scroll compressor for compressing gas a scroll unit having stationary and orbiting scroll members with interfitting spiroidal wraps is hermetically enclosed in a housing. During operation, a compression chamber defined between the scroll chambers is given a high pressure, and the space in the housing below the orbiting scroll member is given a low pressure atmosphere. A motor housed in the low pressure atmosphere rotates a drive shaft. This drive shaft causes the orbiting scroll member to orbit. A passage is provided in the orbiting scroll member to connect the low pressure atmosphere and the compression chamber. A thrust reduction mechanism is supported by the housing in the low pressure atomophere. The thrust reduction mechanism receives the pressure of the compression chamber via the passage.

Scroll compressor with a thrust reduction mechanism

In a scroll compressor, at least one suction port for gas is opened in a stationary end plate which has a spiral wrap. Gas is drawn directly into the compression chambers from the suction port. In addition, the suction port has an opening straddling both the radially extending surface of the stationary end plate at the outermost circumference of the compression chambers and the compression chamber side wall that is perpendicular to the radially extending surface, and the opening area of the suction port is relatively large.

Scroll compressor with suction port in stationary end plate

In a scroll compressor enclosed in a casing and a movable scroll member is driven eccentrically by an electric motor, a thrust force created by the compression and applied to the movable scroll member is cancelled by a high pressure chamber which is provided between a surface of the movable scroll member and a frame member and supplied with a pressurized gas delivered from the scroll compressor. The high pressure chamber is formed into an annular shape defined by radially inner and outer tapered walls, and radially inner and outer seal rings having resilience to shrink and expand respectively are provided in the chamber for preventing leakage of the gas out of the high pressure chamber.

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Tokyo, Japan

Makoto Hayano