Daikin Industries, Ltd.

Daiken Industries, Ltd.

Hiroshi Kitaura

Masanori Yanagisawa

Kazuhiko Matsukawa

Keiji Komori

Kazuhiro Furusho

Yoshitaka Shibamoto

Hiroyuki Yamaji

Mikio Kajiwara

Yasuhiro Murakami

Masahide Higuchi

Kenji Nagahara

Hiroyuki Taniwa

Katsumi Kato

Yoshinobu Yosuke

Hideki Matsuura

Toshiyuki Toyama

Kouji Tanaka

Hiroyuki Kuroiwa

Toshiaki Yoshii

Masaki Nomura

Souichi Nakamura

Kenji Matsuba

Hideyuki Nakajima

Ryouhei Deguchi

Suguru Ishiguro

Jin Takeda

Shuuichi Joumura

Yuuta Okamura

Yuji Sakata

A scroll compressor includes a compression mechanism having a fixed scroll and a movable scroll, and a floating member supporting the movable scroll. The floating member includes an opposing surface opposed to a back surface of the movable scroll. The back surface of the movable scroll includes a first portion facing an inner portion of the opposing surface of the floating member, and a second portion facing an outer portion of the opposing surface of the floating member. A clearance is present between the inner portion of the opposing surface and the first portion of the back surface.

Scroll compressor and refrigeration device

A compressor includes a compression mechanism and a drive shaft having an oil supply hole opened through an outer peripheral surface of the drive shaft to supply oil to a bearing surface of the drive shaft. An oil discharge passage communicating with the oil supply hole is formed by a flat surface or a recessed surface at a portion of the outer peripheral surface of the drive shaft. A trailing edge of the oil discharge passage is displaced behind a trailing edge of the oil supply hole with respect to a rotation direction of the drive shaft. A leading edge of the oil discharge passage is displaced behind a leading edge of the oil supply hole with respect to the rotation direction of the drive shaft. The oil discharge passage has a width that is no larger than a diameter of the oil supply hole.

Compressor with trailing and leading edges of oil discharge passage displaced behind trailing and leading edges of oil supply hole

A scroll compressor includes a fixed scroll, an orbiting scroll and an injection passage. Each scroll has an end plate and a spiral lap. The scrolls mesh with each other to form a compression chamber. The injection passage supplies intermediate pressure refrigerant and refrigeration oil separated from discharged refrigerant to the compression chamber. At least one of the scrolls has a bottom land facing the lap of the other of the scrolls. The bottom land has an intermediate bottom region facing a part of the compression chamber communicating with the injection passage, and a suction side bottom region located closer to an outer end of the lap than the intermediate bottom region. A clearance between the suction side bottom region and the end face of the lap is larger than a clearance between the intermediate bottom region and the end face of the lap.

Scroll compressor

In a rotary compressor to perform oil supplying to bearings through a main oil-supply passage formed in a drive shaft by making use of pressure differential between high-level pressure and low-level pressure in the casing, sealing portions having air-tight structures are formed at both sides in the axis direction of each of the sliding faces constituted between the drive shaft and the bearings, putting bearing-portion oil-supply passages between the sealing portions, to improve the reliability of the bearings by preventing high-pressure gas flowing into a portion between the drive shaft and the bearings.

Rotary compressor with sealing portions and oil-supply groove

Disclosed is an enclosed type compressor in which a scroll type compression mechanism and an electric motor are attached firmly to a casing, with the scroll type compression mechanism and the electric motor in contact with an inner face of the casing. Formed in a plane orthogonal to the longitudinal direction of the casing are a contact part of the casing which makes contact with the scroll type compression mechanism (the electric motor) and a non-contact part of the casing which does not make contact with the scroll type compression mechanism (the electric motor). The non-contact part with respect to the scroll type compression mechanism has a peripheral length different from that of the non-contact part with respect to the electric motor.

Enclosed compressor with vibration reduction

Formed in a scroll type compression mechanism is a connection passageway with a discharge opening through which refrigerant compressed by the compression mechanism flows out into a clearance space defined between the compression mechanism and a drive motor. A muffler space in communication with the connection passageway that is configured to reduce operating noise is formed in the compression mechanism. A motor cooling passageway configured to circulate working fluid which has flowed out into the clearance space is formed between the drive motor and an inner surface area of a casing. A guide plate is disposed in the clearance space. Formed in the guide plate is a flow dividing concave portion which causes a part of refrigerant flowing toward the motor cooling passageway to be distributed in a circumferential direction and toward an internal end of a discharge pipe located in the clearance space.

High-low pressure dome type compressor

In a rotating compressor, an outer peripheral surface of a partition member which is secured firmly to a casing so as to divide the inside of the casing into a high-level pressure space and a low-level pressure space, is provided with a peripheral groove for allowing for shrinkage of the casing at a weld area where a trunk part and end plate of the casing are welded together. As a result of such arrangement, the partition member is strongly tightened by making utilization of such shrinkage, thereby not only enhancing sealability between the high-level pressure space and the low-level pressure space in the inside of the casing but also preventing a drop in workability during assembling and an increase in cost.

A fixed scroll ( ) and a movable scroll ( ) form a compression chamber ( ). A first back pressure chamber ( ) is formed on the back surface of the movable scroll ( ). The first back pressure chamber receives a fluid of a discharge pressure. An unloader mechanism ( ) is provided for guiding refrigerant gas from the compression chamber ( ) in the process of compression toward a suction port ( ). A control part ( ) is provided for controlling the unloader mechanism ( ). When separating force is to exceed pressing force, the control part detects this and operates the unloader part for guiding the fluid from the compression chamber in the process of compression toward the suction part. Thus obtained is a scroll compressor attaining relatively sufficient pressing force by reducing separating force also when pressing force is reduced and suppressing internal leakage.

Scroll type compressor

In a scroll type compressor ( ) that includes a fixed scroll ( ) fixed inside of a casing ( ) and a movable scroll ( ) meshed with the fixed scroll ( ) and presses the movable scroll ( ) against the fixed scroll ( ), the pressing force of the movable scroll ( ) against the fixed scroll ( ) is obtained from the pressure of a high-pressure space (S ) that acts on the back face of the movable scroll ( ) and the pressing force is controlled in accordance with the variation in the compression ratio with the change in the operating condition thereby preventing decrease in efficiency and mechanical loss.

A porous bronze and a resin impregnated in pores of the porous bronze formed on a backing metal constitute a bearing At a surface to be brought into contact with a crank shaft porous bronze and resin are sparsely exposed. Ratio of area of exposure of porous bronze at the contact surface is at least 5% and at most 60%. Thus a bearing for a refrigerating compressor having high seizure resistance at the time of boundary lubrication and having small amount of wear caused by sliding as well as a refrigerating compressor employing the same can be obtained.

Bearing for refrigerating machine compressor and compressor

Oil separator for compressor, scroll compressor using same, and method

Oil-level controller for compressor

Growing community of inventors

Sakai, Japan

Hiroshi Kitaura