Abstract: A motor-driven compressor that includes a compression unit adapted to compress refrigerant, an electric motor adapted to drive the compression unit, and a housing that accommodates the compression unit and the electric motor. The housing includes a coupling member. A motor driving circuit is adapted to drive the electric motor. The motor driving circuit includes a circuit board and a capacitor, which is electrically connected to the circuit board. The capacitor includes a side surface and an end surface that faces the coupling member. A resin material is located between the coupling member and the capacitor. The coupling member includes a facing surface that faces the capacitor. The facing surface includes a recess extending away from the capacitor. The recess receives some of the resin material.

Abstract: A motor-driven compressor that includes a compression unit adapted to compress refrigerant, an electric motor adapted to drive the compression unit, and a housing that accommodates the compression unit and the electric motor and includes a coupling member. A motor driving circuit drives the electric motor. The motor driving circuit includes a circuit board and a capacitor, which is electrically connected to the circuit board. A capacitor holder holds the capacitor and is coupled to the coupling member. One of the capacitor holder and the coupling member includes a projection, and the other one of the capacitor holder and the coupling member includes an engagement portion that engages with the projection. Engagement between the projection and the engagement portion positions the capacitor holder relative to the coupling member.

Abstract: A motor-driven compressor includes a metal housing accommodating a compression unit and an electric motor and a resin cover coupled to the housing. The cover and the housing define an accommodation chamber that accommodates a motor driving circuit that drives the electric motor. A metal shield is fixed to the cover and blocks electromagnetic noise. The shield and the cover are stacked together. A sealing member located between the shield and the cover. The sealing member is configured to block entry of foreign matter into the accommodation chamber through a gap between the shield and the cover.

Abstract: An electric compressor includes: a compressing unit; an electric motor that rotates the compressing unit; and a driving circuit. The driving circuit includes a filter circuit, an inverter circuit that receives electric power from the power supply line via the filter circuit, and a circuit board on which the inverter circuit is disposed, and a base member (aluminum base) and that supports the circuit board. The filter circuit has an electromagnetic coil and a damping resistor. The damping resistor is fixed to the aluminum base in abutment with the aluminum base. Preferably, the filter circuit is mounted on the circuit board, and the damping resistor has a lead line soldered to the circuit board and is fixed to the aluminum base by a screw. With this, there can be provided the electric compressor capable of effectively cooling the damping resistor of the filter circuit.

Abstract: An electric compressor includes a housing accommodating therein a compression mechanism and an electric motor which drives the compression mechanism through a rotating shaft thereof, and an inverter cover which is joined to the housing and accommodates therein an inverter circuit portion. The inverter circuit portion is supported by a base member which is mounted to the housing and includes electrolytic capacitors mounted to the base member in such an orientation that the longitudinal direction of the electrolytic capacitors intersect the axis of the rotating shaft and a capacitor holder for housing the electrolytic capacitors. The electrolytic capacitors and the capacitor holder are disposed at a position radially inward of mounting legs of the base member and also radially inward of an imaginary extension extending in the axial direction.

Abstract: A motor-driven compressor includes a metal housing accommodating a compression unit and an electric motor and a resin cover coupled to the housing. The cover and the housing define an accommodation chamber that accommodates a motor driving circuit that drives the electric motor. A metal shield is fixed to the cover and blocks electromagnetic noise. The shield and the cover are stacked together. A sealing member located between the shield and the cover. The sealing member is configured to block entry of foreign matter into the accommodation chamber through a gap between the shield and the cover.

Abstract: A motor-driven compressor that includes a compression unit adapted to compress refrigerant, an electric motor adapted to drive the compression unit, and a housing that accommodates the compression unit and the electric motor and includes a coupling member. A motor driving circuit drives the electric motor. The motor driving circuit includes a circuit board and a capacitor, which is electrically connected to the circuit board. A capacitor holder holds the capacitor and is coupled to the coupling member. One of the capacitor holder and the coupling member includes a projection, and the other one of the capacitor holder and the coupling member includes an engagement portion that engages with the projection. Engagement between the projection and the engagement portion positions the capacitor holder relative to the coupling member.

Abstract: A motor-driven compressor includes a motor driving circuit including a capacitor electrically connected through a lead to a circuit board, and a capacitor holder that is made of a plastic and holds the capacitor. The capacitor holder includes a side wall, which covers a side surface of the capacitor. The lead protrudes from the side surface. The side wall includes a through-hole, which opens through each of a first end surface of the side wall facing the circuit board and a second end surface of the side wall opposite to the circuit board and guides the lead to a portion of the circuit board to which the lead is to be connected. The side wall includes a wall surface facing the capacitor. The wall surface includes a slit, which is continuous with the through-hole and opens opposite to the circuit board.

Abstract: A motor-driven compressor that includes a compression unit adapted to compress refrigerant, an electric motor adapted to drive the compression unit, and a housing that accommodates the compression unit and the electric motor. The housing includes a coupling member. A motor driving circuit is adapted to drive the electric motor. The motor driving circuit includes a circuit board and a capacitor, which is electrically connected to the circuit board. The capacitor includes a side surface and an end surface that faces the coupling member. A resin material is located between the coupling member and the capacitor. The coupling member includes a facing surface that faces the capacitor. The facing surface includes a recess extending away from the capacitor. The recess receives some of the resin material.

Abstract: A motor-driven compressor includes a motor driving circuit, which includes a capacitor electrically connected to a circuit board, and a capacitor holder, which holds the capacitor. The capacitor holder includes a side wall body, which covers a side surface of the capacitor, a first retainer, which extends from the side wall body to the circuit board and engages with a first end surface of the capacitor, and a second retainer, which extends from the side wall body in a direction away from the circuit board and holds the second end surface of the capacitor. The length of the second retainer in the extending direction of the second retainer is greater than the length of the first retainer in the extending direction of the first retainer.

Abstract: A variable displacement compressor including a drive shaft through which a gas passage extends between front and rear ends of the drive shaft. The gas passage is connected to a suction chamber at the rear end of the drive shaft. The drive shaft includes a first gas inlet passage, which connects the gas passage to a crank chamber through a lip seal, an oil chamber, and a thrust bearing, and a second gas inlet passage, which connects the gas passage to a central portion of the crank chamber. The drive shaft further includes a sleeve movable along the drive shaft as a swash plate inclines to adjust an open amount of the second gas inlet passage in accordance with the inclination angle of the swash plate, that is, the displacement of the compressor.

Abstract: A variable displacement compressor including a drive shaft through which a gas passage extends between front and rear ends of the drive shaft. The gas passage is connected to a suction chamber at the rear end of the drive shaft. The drive shaft includes a first gas inlet passage, which connects the gas passage to a crank chamber through a lip seal, an oil chamber, and a thrust bearing, and a second gas inlet passage, which connects the gas passage to a central portion of the crank chamber. The drive shaft further includes a sleeve movable along the drive shaft as a swash plate inclines to adjust an open amount of the second gas inlet passage in accordance with the inclination angle of the swash plate, that is, the displacement of the compressor.

Abstract: In a piston type compressor, a housing includes a cylinder block that forms plural cylinder bores and an accommodating hole at a center thereof. The valve port assembly connected to the cylinder block includes suction and discharge ports, suction and discharge valves made of flapper valves. An end portion of the drive shaft rotatably supported by the housing is slidably accommodated in the accommodating hole. The piston in each cylinder bore and the valve port assembly form a compression chamber. The cylinder block forms therein communication holes that connect each compression chamber to the end portion that forms therein a residual gas bypass passage. The residual gas bypass passage connects one communication hole, which communicates with the high-pressure side compression chamber that has finished discharge process of gas, to another communication hole, which communicates with the compression chamber that is lower in pressure than the high-pressure side compression chamber.

Abstract: A piston type compressor includes a suction valve mechanism. The suction valve mechanism includes a rotary valve coupled to a rotary shaft. A valve timing adjusting apparatus is capable of changing a relative rotational phase, which is a rotational phase of the rotary valve relative to the rotary shaft. Therefore, the compressor is capable of adjusting the valve timing of the rotary valve and has a reduced size in the axial direction.

Abstract: A rotary valve operationally connected to a rotary shaft is housed so as to be slidably rotatable in an accommodation hole formed in a cylinder block. A suction valve mechanism functions so as to introduce refrigerant gas in a suction chamber into a compression chamber. A gas suction passage leading from the suction chamber to the compression chamber can be opened and closed in synchronism with rotation of the rotary shaft. In an outer circumferential surface of the rotary valve is formed a groove constituting a part of a gas vent passage for introducing the refrigerant gas in a crank chamber into the compression chamber.

Abstract: A piston type compressor has introducing passages, each extending from one of compression chambers, and a cylindrical rotary valve located between a suction pressure zone and the introducing passages. An opening of each of the introducing passages has an advanced area a part of that is inclined relative to an axial direction and a circumferential direction of the rotary valve. The rotary valve has a residual gas bypass passage. The residual gas bypass passage connects a high pressure introducing passage through the introducing passages, which communicates with the high pressure compression chamber after the discharge stroke ends, to a low pressure introducing passage, which communicates with the low pressure compression chamber.

Abstract: A piston type compressor includes a housing, a refrigerant gas passage and a rotary valve. The housing defines a suction pressure region. The refrigerant gas passage interconnects the suction pressure region with at least a compression chamber. The rotary valve includes a suction guiding hole which forms a part of the refrigerant gas passage. The suction guiding hole connects each compression chamber by turns with the suction pressure region as the rotary valve is rotated. The suction guiding hole communicates with a plurality of the compression chambers at least at early and last stages in a suction process. The suction guiding hole has a predetermined area per unit length in a rotational direction of the rotary valve. The predetermined area gradually increases from a preceding side of the rotation of the rotary valve to a middle and gradually decreases from the middle to a following side of the rotary valve.

Abstract: A piston for a compressor has a head portion, a neck portion, a receiving wall for receiving reactive force and a first guide wall. The receiving wall extends from a drive shaft side of the head portion towards the neck portion; is disposed on a preceding side in a rotating direction of a cam plate; and has an outer circumferential surface that slides over the inner circumferential surface of the cylinder bore. The first guide wall extends from the drive shaft side of the head portion towards the neck portion; is disposed on a following side in the rotating direction of the cam plate; and has an outer circumferential surface that slides relative to the inner circumferential surface of the cylinder bore. A recess is formed in the outer circumferential surface of the first guide wall.