A compressor includes a shaft, a motor unit that causes the shaft to rotate, a compressor unit that compresses a refrigerant according to rotation of the shaft, and a housing that stores therein the shaft, the motor unit, and the compressor unit, wherein the housing and the motor unit are joined by welding in a plurality of welding areas, the motor unit includes a rotor that is fixed to the shaft, and a stator core that surrounds the rotor, a plurality of core sheets are superimposed in the stator core and the stator core includes a plurality of teeth around which a coil is wounded and a plurality of swaging fixing areas where swaging areas fix the core sheets mutually, and the welding areas are formed in only positions corresponding to the swaging fixing areas.

A swash plate type liquid-pressure rotating device includes a movement restricting mechanism configured to restrict a movement of a spherical bushing relative to a rotating shaft toward a first side in an axial direction. The movement restricting mechanism is a restricting member such that a portion of the spherical bushing which portion is located at the first side in the axial direction contacts the restricting member. The swash plate type liquid-pressure rotating device further includes: a stopper attached to the rotating shaft; and a gap adjusting member. The gap adjusting member is inserted into a gap G3 formed between the stopper and the bearing when the spherical bushing, the retainer plate, the shoe, and the swash plate tightly contact one another in the axial direction. The gap adjusting member restricts a movement of the rotating shaft relative to the casing toward the first side in the axial direction.

An axial piston pump, particularly for hydraulic systems, includes a cylinder drum (1) rotationally driven about an axis (15) in a pump housing (7). Piston cylinder units are arranged in the drum in a circle at an offset. Pistons (21) are at least indirectly supported on a swashplate (3) by their actuation end (31) accessible outside the cylinder drum (1). Between the swept volumes (19) of the piston cylinder units and a stationary fluid inlet and stationary fluid outlet of the pump housing (7), a control device (23) is arranged that has fluid channels (25, 26) for the targeted transfer of fluid from the fluid inlet into the swept volumes (19) and from the swept volumes (19) to the fluid outlet. At least one pressure compensation channel (28, 30) is provided in the control device (23), between the fluid channels (25, 26), to build or release fluid pressure in the swept volumes (19) in a targeted manner.

A variable displacement compressor which prevents leakage of a refrigerant flowing directly into a suction chamber without passing via a crank chamber at a time of a minimum discharge displacement operation, thus making it possible to prevent an increase of a minimum discharge displacement by increasing a refrigerant pressure in the crank chamber, and in addition, making it possible to prevent insufficient lubrication of sliding portions and the like in the crank chamber.

A swash plate compressor including rotor arms protruding from a rotor toward a swash plate and having rotor arm holes; swash plate arms protruding from the swash plate toward the rotor and having swash plate arm holes; and a link arm hingedly coupled to the rotor arms and the swash plate arms by link pins, in which the swash plate arms include a first swash plate arm positioned at a side in rotation direction of the shaft based on the link arm; and a second swash plate arm positioned at a side in a direction opposite to the rotation direction of the shaft based on the link arm, and in which the first swash plate arm has higher wear resistance than the second swash plate arm.

Disclosed herein are a discharge valve and a compressor having the same. The discharge valve includes a valve casing having a hook formed around the upper portion thereof such that the hook is seated on a discharge port of a cylinder block, a first opening formed at the center of the upper portion for introduction of a compressed fluid, and a second opening formed around the lower portion thereof for discharge of the compressed fluid, a core body disposed within the valve casing, an elastic body disposed to touch one side of the core body, and a support block mounted to the lower end of the valve casing to support the elastic body. According to the disclosure, the separation of the discharge valve can be prevented due to back pressure between a discharge pipe and the inside of the compressor by pressing the discharge valve against a discharge gasket.

Disclosed herein are a discharge valve and a compressor having the same. The discharge valve includes a valve casing having a hook formed around the upper portion thereof such that the hook is seated on a discharge port of a cylinder block, a first opening formed at the center of the upper portion for introduction of a compressed fluid, and a second opening formed around the lower portion thereof for discharge of the compressed fluid, a core body disposed within the valve casing, an elastic body disposed to touch one side of the core body, and a support block mounted to the lower end of the valve casing to support the elastic body. According to the disclosure, the separation of the discharge valve can be prevented due to back pressure between a discharge pipe and the inside of the compressor by pressing the discharge valve against a discharge gasket.

A variable displacement swash plate type compressor control method and a variable displacement swash plate type compressor controlled thereby may include a first determination step of determining whether liquid refrigerant exists within the variable displacement swash plate type compressor; a first operation step of applying power to the field coil assembly and of not applying current to the electronic control valve, when it is determined in the first determination step S1 that the liquid refrigerant exists; a second determination step of comparing an elapsed period of time of operating in the first operation step with a predetermined reference time; and a second operation step of maintaining the power applied in the first operation step to the field coil assembly and applying current to the electronic control valve when the elapsed period of time is greater than or equal to the reference time.

Disclosed is a suction damping case. A refrigerant introduced into the suction damping case flows for a predetermined period of time at reduced pressure and speed, and then is discharged to the outside of the body, so that a damping function can be made. When the suction damping case is coupled to a rear housing, a hook and an embossing prevents the suction damping case from being separated.

A compressor that includes a casing, a compression mechanism provided inside the casing to compress a refrigerant, a rotary shaft transmitting a rotational force to the compression mechanism from a drive source provided outside the casing, a clutch connecting the drive source and the rotary shaft by a magnetic force generated when electric power is applied to the clutch and disconnecting the drive source and the rotary shaft by losing the magnetic force when the electric power applied thereto is cut off, and a rotation measurement means for receiving the magnetic force from the clutch to measure a change in magnetic flux according to the rotation of the rotary shaft and measure a rotational speed of the rotary shaft. Thus, it is possible to measure the rotational speed of the rotary shaft without including a permanent magnet.