Abstract: A sealed type motor-driven compressor includes a cylindrical motor housing and an annular stator core fastened to the interior of the motor housing. A method of assembling the compressor includes fastening the stator core to the motor housing by mechanically deforming at least one of the motor housing and the stator core. It is thus possible to set the fastening interference between the motor housing and the stator core to a sufficiently great level for suppressing loosening of the stator core with respect to the motor housing, which may otherwise be caused by a relatively high pressure produced by refrigerant gas.

Abstract: A scroll type compressor includes a housing defining a discharge pressure region, a fixed scroll member having a fixed base plate and a fixed scroll wall, a movable scroll member having a movable base plate and a movable scroll wall, a fixed wall slidably supporting the movable scroll member, a back pressure chamber defined on a back surface side of the movable base plate. A supply passage connects the back pressure chamber to the discharge pressure region and passes through a sliding portion between the movable scroll member and the fixed wall. A clearance at the sliding portion varies in response to a position of the movable scroll member in a direction in which the movable scroll member approaches to or leaves from the fixed wall, whereby cross-sectional area of the clearance where gas passes is varied to adjust pressure in the back pressure chamber.

Abstract: A compressor includes a housing having a high-pressure region and a low-pressure region, a rotary shaft, a compression unit, and a seal member. The seal member has an annular and plate-like shape and is provided in the housing for preventing gas from leaking from the high-pressure region to the low-pressure region via a gap between the rotary shaft and the housing. Pressure of the gas in the high-pressure region is applied to the seal member thereby generating a seal function. The seal member is fixed to one of the housing and the rotary shaft and in contact with an edge that is formed in the other of the housing and the rotary shaft and connects a first-surface facing the high-pressure region and a circumferential surface coaxial with the rotary shaft in the other of the housing and the rotary shaft.

Abstract: An electromagnetic actuator includes a cylinder, a stationary core and a movable core arranged in the cylinder, and a coil located about the cylinder. The movable core moves in the cylinder in accordance with an electromagnetic force, which is generated between the stationary core and the movable core based on the current supply to the coil. The cylinder includes a first cylindrical member made of nonmagnetic material, and a second cylindrical member made of magnetic material. The first cylindrical member surrounds the stationary core and the movable core. A part of the first cylindrical member in the vicinity of the movable core is made thin to form a small diameter portion. The small diameter portion is fitted to the second cylindrical member.

Abstract: A compressor has a housing, a compression mechanism and a partition member. The housing defines therein a discharge chamber. The compression mechanism is located adjacent to the discharge chamber in the housing. The partition member faces a predetermined region, which is a portion of the compression mechanism that faces the discharge chamber except a specific region where a gas discharge port opens, for restraining pressure of refrigerant gas in the discharge chamber to be applied to the predetermined region.

Abstract: A scroll type compressor includes a housing defining a discharge pressure region, a fixed scroll member having a fixed base plate and a fixed scroll wall, a movable scroll member having a movable base plate and a movable scroll wall, a fixed wall slidably supporting the movable scroll member, a back pressure chamber defined on a back surface side of the movable base plate. A supply passage connects the back pressure chamber to the discharge pressure region and passes through a sliding portion between the movable scroll member and the fixed wall. A clearance at the sliding portion varies in response to a position of the movable scroll member in a direction in which the movable scroll member approaches to or leaves from the fixed wall, whereby cross-sectional area of the clearance where gas passes is varied to adjust pressure in the back pressure chamber.

Abstract: A sealed type motor-driven compressor includes a cylindrical motor housing and an annular stator core fastened to the interior of the motor housing. A method of assembling the compressor includes fastening the stator core to the motor housing by mechanically deforming at least one of the motor housing and the stator core. It is thus possible to set the fastening interference between the motor housing and the stator core to a sufficiently great level for suppressing loosening of the stator core with respect to the motor housing, which may otherwise be caused by a relatively high pressure produced by refrigerant gas.

Abstract: In a motor compressor, a housing forms a fitting surface at an outer peripheral surface of the housing and a plurality of insertion holes extending through the housing at the fitting surface. A compression mechanism is accommodated in the housing. An electric motor is accommodated in the housing for driving the compression mechanism. A plurality of terminal pins transmits electric current to the electric motor. A terminal substrate is fastened to the housing by a bolt so as to be fixed to the fitting surface and forms a plurality of holes. The terminal pin is inserted into each hole of the terminal substrate while being fixedly supported on the terminal substrate so as to be insulative and airtight. The insertion holes correspond to the holes. The gasket is interposed between the fitting surface and the terminal substrate, while each terminal pin is inserted into the corresponding insertion holes.

Abstract: A scroll compressor includes a fixed scroll member fixed to a housing and a movable scroll member engaging the fixed scroll member. Each scroll member has a base plate and a spiral wall. A compression chamber between the fixed and movable scroll members reduces in volume by orbiting the movable scroll member, thus compressing gas. A back pressure chamber is defined in the housing on a back surface side of the movable scroll base plate between the movable scroll member and the a fixed wall of the housing. An introducing passage interconnects the back pressure chamber and a relatively high pressure region. A seal member on one of the movable scroll member and the fixed wall seals the back pressure chamber as being slidable on the other. The seal member includes a portion for lowering sealing performance, which interconnects the back pressure chamber and a relatively low pressure region.

Abstract: A control valve for a variable displacement compressor is provided. A retainer cylinder in the control valve includes a first cylindrical member made of non-magnetic material and a second cylindrical member having a bottom portion made of magnetic material. A shim is intervened a bottom surface of a plunger and inner bottom surface of the second cylindrical member. The retainer cylinder has good magnetic permeability between a coil and the plunger, even though the wall of the cylinder thickens to improve the withstanding pressure to internal refrigerant pressure.

Abstract: A control valve is used for a variable displacement compressor installed in a refrigerant circuit of a vehicle air conditioner. The control valve has a valve housing. A valve chamber is defined in the valve housing. A valve body is accommodated in the valve chamber. A pressure sensing chamber is defined in the valve housing. A pressure sensing member separates the pressure sensing chamber into a first pressure chamber and a second pressure chamber. The pressure at a first location in the refrigerant circuit is applied to the first pressure chamber. The pressure at a second location in the refrigerant circuit, which is downstream of the first location, is applied to the second pressure chamber. The pressure sensing member moves the valve body in accordance with the pressure difference between the first pressure chamber and the second pressure chamber such that the displacement of the compressor is varied to counter changes of the pressure difference.

Abstract: A displacement control mechanism used for compressor is installed in a refrigerant circuit. The compressor has a bleed passage and a supply passage. The displacement control mechanism includes a first control valve and a second control valve. The first control valve includes a first valve body and a pressure sensitive member. The first valve body adjusts the opening size of the supply passage. The pressure sensitive member moves in accordance with a pressure in the refrigerant circuit. A pressure detection region is located downstream of the first valve body. The second control valve includes a second valve body. The second valve body adjusts the opening size of the bleed passage. The second valve body moves in accordance with the pressure of the pressure detection region. When the pressure of the pressure detection region increases, the second control valve decreases the opening size of the bleed passage. This permits to start with rapid cooling performance.

Abstract: An electromagnetic actuator includes a cylinder, a stationary core and a movable core arranged in the cylinder, and a coil located about the cylinder. The movable core moves in the cylinder in accordance with an electromagnetic force, which is generated between the stationary core and the movable core based on the current supply to the coil. The cylinder includes a first cylindrical member made of nonmagnetic material, and a second cylindrical member made of magnetic material. The first cylindrical member surrounds the stationary core and the movable core. A part of the first cylindrical member in the vicinity of the movable core is made thin to form a small diameter portion. The small diameter portion is fitted to the second cylindrical member.

Abstract: A control valve for a variable displacement compressor is provided. A retainer cylinder in the control valve includes a first cylindrical member made of non-magnetic material and a second cylindrical member having a bottom portion made of magnetic material. A shim is intervened a bottom surface of a plunger and inner bottom surface of the second cylindrical member. The retainer cylinder has good magnetic permeability between a coil and the plunger, even though the wall of the cylinder thickens to improve the withstanding pressure to internal refrigerant pressure.

Abstract: A control valve is used for a variable displacement compressor installed in a refrigerant circuit of a vehicle air conditioner. The control valve has a valve housing. A valve chamber is defined in the valve housing. A valve body is accommodated in the valve chamber. A pressure sensing chamber is defined in the valve housing. A pressure sensing member separates the pressure sensing chamber into a first pressure chamber and a second pressure chamber. The pressure at a first location in the refrigerant circuit is applied to the first pressure chamber. The pressure at a second location in the refrigerant circuit, which is downstream of the first location, is applied to the second pressure chamber. The pressure sensing member moves the valve body in accordance with the pressure difference between the first pressure chamber and the second pressure chamber such that the displacement of the compressor is varied to counter changes of the pressure difference.

Abstract: A displacement control mechanism used for compressor is installed in a refrigerant circuit. The compressor has a bleed passage and a supply passage. The displacement control mechanism includes a first control valve and a second control valve. The first control valve includes a first valve body and a pressure sensitive member. The first valve body adjusts the opening size of the supply passage. The pressure sensitive member moves in accordance with a pressure in the refrigerant circuit. A pressure detection region is located downstream of the first valve body. The second control valve includes a second valve body. The second valve body adjusts the opening size of the bleed passage. The second valve body moves in accordance with the pressure of the pressure detection region. When the pressure of the pressure detection region increases, the second control valve decreases the opening size of the bleed passage. This permits to start with rapid cooling performance.

Abstract: A scroll type compressor having a front housing, a rear housing, an intermediate outer shell portion arranged between the front and rear housing to form an integral stationary scroll element having a stationary end plate and a stationary spiral member, a movable scroll element having a movable end plate and a movable spiral element and being engaged with the stationary scroll element to define a plurality of compression chambers shifting and reducing in volume to compress refrigerant gas, containing therein an oil component, in response to an orbiting motion of the movable scroll element, a suction port formed in the intermediate outer shell portion to directly introduce the refrigerant gas into the compression chambers, and a discharge chamber in which the refrigerant gas after compression is discharged from the compression chambers.

Abstract: A scroll-type compressor includes a front housing, a rear housing, and stationary and movable scrolls engaging with each other to define a plurality of compression chambers therebetween. The stationary scroll is connected to the rear housing to define a discharge chamber therebetween. The stationary and movable scrolls are provided between the front and rear housings so that the movable scroll moves along an orbiting path. A drive shaft extends through the front housing and is drivingly connected to the movable scroll. The rotation of the drive shaft moves the movable scroll along the orbiting path to shift the compression chambers from the periphery to the center of the scrolls with the volume of the chambers reducing. A slider plate, substantially in the form of a ring, for providing a sliding surface for the movable scroll, relative to the front housing, is disposed between the front housing and the movable scroll.

Abstract: A scroll type compressor having a housing unit in which a movable scroll element and a stationary scroll element are received in such a relationship that the movable scroll element orbits about the center of the stationary scroll element. The scroll type compressor further having a mechanical reinforced rotation preventing unit for preventing rotation of the movable scroll element about its own axis, and the rotation preventing unit having first stationary pin fixed to an inner end face of the housing unit and second movable pin fixed to an end face of a base plate of the movable scroll element, and a ring engaged with the first and second rings. A thickness T1 between the outer circumference of the first pin and the inner edge of the inner end face of the housing unit is set to be equal to or larger than 2.4 mm. A thickness T2 between the outer circumference of the second pin and the outer circumference of the base plate of the movable scroll element is set to be equal to or larger than 2.7 mm.

Abstract: A compressor has a movable scroll supported on a bushing connected to a rotary shaft via an eccentric pin. The movable scroll and the bushing are disposed coaxial to the eccentric pin to rotate together with the eccentric pin. The movable scroll moves along a predetermined circular path around an axis of the rotary shaft to closely contact a fixed scroll, opposed to the movable scroll at a given portion to define a displaceable fluid pocket and compresses refrigerant gas introduced into the fluid pocket. The compressor comprises a first balance weight eccentrically supported on the eccentric pin for an integral rotation therewith. The first balance weight is arranged to generate first centrifugal force counteracting second centrifugal force generated in the movable scroll and the bushing based on the rotation of the movable scroll and the bushing.