Mitsubishi Jukogyo Kabushiki Kaisha

Ubukata Industries Co., Ltd.

Takayuki Iio

Ryuhei Tanigaki

Takahisa Hirano

Shigeki Miura

Yoshiharu Morita

Yasukazu Mizutani

Hideki Koseki

Mikihiko Ishii

Shigemi Sato

Yoshiyasu Ito

Hiroaki Kondo

A scroll compressor has a stationary scroll and a swivel scroll engaged with each other in a hermetic housing. A sealed terminal is provided to send signals outside of the housing from a sensor that is provided within the housing. The sealed terminal is inserted into a fitting hole that passes through the outer wall of the housing. A push nut having a plurality of nails is pressed into the fitting hole to hold the sealed terminal within the fitting hole. The push nut has a plurality of nails having an outer diameter slightly larger than the inner diameter of the fitting hole.

Scroll compressor with sealed terminal

A fixing method and assembly of a temperature responsive element capable of detecting variation in temperature of discharge cooling medium of a compressor exactly and rapidly and preventing the compressor from being burned. A through hole is formed in a cover 6 which covers a path 7B for discharge cooling medium of the compressor. A plug 9 is fixed to the through hole from the side of the path by a fixing member 13. In this case, it is sealed airtightly by means of a packing. Lead terminal pins penetrating the plug 9 is insulatively fixed in the plug airtightly. Leads are connected to one ends of the lead terminal pins projecting outside and the temperature responsive clement 8 is connected to the other ends of the lead terminal pins projecting on the side of the discharge path. The temperature responsive clement 8 is disposed not to come into direct contact with a vessel and the cover 6 of the compressor and is exposed to discharge cooling medium as a whole. Consequently, the temperature responsive element can detect a temperature of the discharge cooling medium exactly and rapidly without influence of external disturbance such as heat from the outside and a path 7A for suction cooling medium.

Fixing assembly of a temperature responsive element and its fixing method

A speed detector of a scroll-type fluid machine in which a fixed scroll and an orbiting scroll, each of which includes a spiral wrap disposed on the inner surface of an end plate thereof, are engaged with each other and housed in a closed housing, and the orbiting scroll revolves while its rotation is checked by means of an Oldham's ring having the orbiting scroll disposed on the outer surface thereof, wherein the Oldham's ring is formed of a magnetic material, and an electromagnetic induction type revolution signal detecting means is installed in an opposed relationship to the Oldham's ring.

Speed detector of scroll-type fluid machine

A first through hole is formed into a shape such that the opening area at the start of the opening increases gradually along with the movement of a piston valve or an auxiliary through hole is provided in a cylinder to introduce the gas being compressed into a suction-side chamber by being opened by the piston valve before the first through hole is opened, so that the gas being compressed is prevented from suddenly entering the suction-side chamber when the piston valve moves in the cylinder.

Capacity control mechanism for scroll-type compressor

A pin passing through a pin hole disposed in a support portion disposed on a rotating shaft is fixed to the support portion by fitting a first push nut to the pin so that the first push nut abuts against the top surface of the support portion. Then, a balance weight is supported by the support portion by fitting a second push nut onto the protruding end of the pin.

Scroll-type fluid machine with attaching means for the balance weight

A scroll type compressor has bypass ports communicating with chambers which are being compressed. The bypass parts are bored in an end plate of a stationary scroll. A capacity control block contained inside a bypass passage has the bypass ports communicating with a suction chamber formed in a housing. A piston valve for opening and closing this bypass passage and control valve which senses a discharge pressure and a suction pressure and generates a control pressure for operating the piston valve is formed separately from the stationary scroll. The capacity control block is installed in close contact with the outer surface of the end plate of the stationary scroll, thus controlling the output capacity of the compressor in a range from 0% to 100%.

Scroll type compressor

A scroll type compressor has a pair of bypass ports which communicate with a chamber being compressed which ports are bored in an end plate of a stationary scroll. An inner surface of a capacity control block of the compressor is separate from the stationary scroll and abuts against the outer surface of the end plate of the stationary scroll, thus forming a recessed portion which communicates with the pair of bypass ports therebetween. One cylinder of the compressor communicates with a suction chamber in a housing and is provided in the capacity control block and a piston operating by a control pressure in accordance with a load of the compressor is disposed slidably in the cylinder. A communicaton hole which communicates with the recessed chamber is opened and closed by the piston, thereby controlling the output capacity of the compressor in the range from 0 to 100%.

A scroll type compressor has bypass ports which communicate with the compression chambers. The bypass ports are bored in an end plate of a stationary scroll. A capacity control block is contained inside a bypass passage which has the bypass ports communicate with a suction chamber formed in a housing. A valve mechanism which opens and closes the bypass passage is formed separately from the stationary scroll. The capacity control block is engaged with the stationary scroll and installed fixedly in the housing, thereby to control the output capacity of the compressor in a range from 0% to 100%.

Scroll type compressor with separate control block

A compressor is composed of a housing equipped with a compression mechanism portion and a cover body having a fitting portion. The housing has a suction cavity communicating with a suction chamber and a discharge cavity communicating with a discharge chamber on a peripheral surface thereof. The suction cavity and the discharge cavity are closed up tightly by fitting the cover body to the housing, and the fitting portion is made to communicate with the suction cavity and the discharge cavity, respectively.

Scroll-type compressor with cover member for suction and discharge

A scroll type fluid machinery has a stationary scroll and a revolving scroll having spiral wraps set up on inner surfaces of respective end plates in engagement with each other. A drive bushing is inserted rotatably into a boss which is projected at a central part of an outer surface of the end plate of the revolving scroll. An eccentric driving pin of a rotary shaft is fitted slidably into a slide groove bored through the drive bushing. A gap between one end of the slide groove in a direction that the radius of revolution becomes larger and the eccentric driving pin is set to a preset very small distance .delta. (here, .delta. is a value determined based on processing error, deformation due to temperature and pressure and the like of the above-mentioned respective scrolls) when the revolving scroll occupies a position of theoretical radius of revolution thereof. With this, it is possible to prevent the drive bushing from tiltably rotating beyond what has been predetermined while the revolving scroll is revolving.

Scroll type fluid machinery with driving pin in bushing slide groove

A scroll type fluid machinery provided with a slide type radius of revolution variable mechanism prevents unilateral working of a rotating bearing 23 due to tilted rotation of a drive bushing 21 and a balance weight 27 fixed thereto. A bolt 41 for regulating tilted rotation is projected at an inner end of a rotary shaft 7, a shaft portion 41a therefor penetrates through a hole 42 bored in the balance weight 27, and a bearing surface 41c of a head 41b thereof is brought into slidable contact with the inner end surface of the balance weight 27. When the radius of revolution is varied at the time of revolution in a solar motion of a revolving scroll 14, an eccentric driving pin 25 slides in a slide groove 24 and the shaft portion 41a of the bolt 41 slides in hole 42 at the same time. In the interim, the bearing surface 41c of the head into slidable contact with the inner end surface of the balance weight 27, thereby to suppress tilted rotation of the balance weight 27.

Scroll type fluid machinery having a tilt regulating member

A scroll-type compressor has a ring-shaped protruding portion of a front case is fitted into an opening end of a case body so as to construct a housing, a stationary scroll and a revolving scroll which are engaged with each other when they are disposed in the housing. The stationary scroll is fixed to the housing, and at the same time, the revolving scroll is made to revolve in solar motion by a revolution drive mechanism from a rotary shaft while checking rotation on its axis of the revolving scroll by a rotation check mechanism. More particularly, a compressor in which a gas suction port is opened at a location where the ring-shaped protruding portion of the case body is engaged and at least one and more draught holes including a through hole which penetrates to the inside opposing to the suction port are provided on the ring-shaped protruding portion. It is thereby possible to improve cooling and lubrication of the rotation check mechanism and the revolution drive mechanism.

Growing community of inventors

Nishikasugai, Japan

Takayuki Iio