A multi-cylinder reciprocating compressor for cooling systems and/or conditioning systems and/or heat pumps, comprising a casing, in which at least one first group of at least three cylinders is provided, in which cylinders respective suction/compression pistons for sucking/compressing the cooling fluid in said cylinders being adapted to slide, and at least one first head tightly connected to said casing above said at least one first group of at least three cylinders, suction and delivery chambers for the fluid being defined on said at least one head that are associated with the at least three cylinders of said at least one first group of cylinders, at least one partialization device being provided for partializing the fluid sucked by said at least one first group of cylinders so as to vary the flow rate of the fluid sucked through the first head, with which the first group of cylinders is associated, said at least one first head comprising at least one first suction chamber and one second suction chamber, separated from each other and provided with respective suction ports, wherein each chamber is connected to a respective sub-group of cylinders of a respective first group, and wherein the partialization device comprises at least one first valve and at least one second valve that are adapted to close/to open the suction port of said first chamber and said second chamber respectively.

The hermetically encapsulated refrigerant compressor includes a cylinder, a reciprocating piston arranged in the cylinder and having a reciprocating piston axis, a valve plate comprising a suction valve opening and a discharge valve, a cylinder head on the side of the valve plate facing away from the cylinder, a cylinder head cover which has an outlet for compressed refrigerant, and a sound absorber. On the side of the valve plate facing away from the cylinder, a nozzle is arranged as an inlet for refrigerant to be drawn in, the nozzle having a first end arranged at the suction valve opening and a second end. The nozzle is inclined at a maximum angle of inclination of between −45° and +45° in relation to the reciprocating piston axis. The sound absorber has a housing with a suction opening into which the second end of the nozzle leads.

Aspects described herein relate generally to rotary compressors that incorporate a flywheel within to significantly reduce the compressor vibration and drive torque ripples as well as to achieve a higher overall electro-mechanical efficiency and potentially lower combined costs of BLDC rotary compressors and their drive electronics.

An air compressor includes a compressor assembly having an electric motor and a pump driven by the motor, a battery pack electrically connected to the motor for providing electrical power thereto, a storage tank that receives compressed air from the pump, and a case enclosing at least the compressor assembly and the storage tank. The case attenuates noise emitted by the compressor assembly.

The invention relates to a holder suitable for fixing an electrical compressor in a vehicle. In embodiments the holder comprises a housing with a receptacle, the housing configured to accommodate the electrical compressor in the receptacle. The housing may have a connector for fixing the electrical compressor on a mounting of a vehicle, and the holder may comprise at least one damper.

The pump has a casing accommodating a piston and a driving part. The casing has a first casing member having a driving part retaining portion retaining the driving part, a second casing member fixedly stacked on the first casing member in the reciprocating direction of the piston, and a cylindrical pump chamber peripheral wall member disposed around a head of the piston. The second casing member has an end wall portion extending in a transverse direction substantially perpendicular to the reciprocating direction. A pump chamber, a delivery chamber, and a buffer chamber are defined between the first casing member and the end wall portion of the second casing member. The pump chamber, the delivery chamber, and the buffer chamber are disposed side-by-side in the transverse direction.

An electric compressor includes a housing, an inverter, an inverter case, a case bottom wall, and a case peripheral wall. The inverter case has a seal peripheral wall. The seal peripheral wall has a cylindrical shape and extends from the case bottom wall in a direction opposite to a direction in which the case peripheral wall extends. The seal peripheral wall surrounds a part of an outer peripheral surface of the housing. A seal member having an annular shape seals a gap between an inner peripheral surface of the seal peripheral wall and the outer peripheral surface of the housing.

[Problem] Provided is an airtight terminal that is configured to lessen distortion-borne stress caused in a metallic outer ring as a result of screw fastening or other fixing means to prevent the stress from readily propagating to an insulating material in a sealed place of a lead.

[Solution] An airtight terminal is provided that includes a metallic outer ring 13 having through holes 11 formed for screw fastening and sealing holes 12, leads 14 inserted through the sealing holes 12 in the metallic outer ring 13, and pieces of an insulating, material 15 to seal gaps between the metallic outer ring 13 and the respective leads 14. The metallic outer ring 13 is provided with pairs of cavities 13a and steps 13b surrounding the respective sealing holes 12.

A compressor includes a stator core that includes a yoke portion and a teeth portion, a rotor that is arranged inside the stator core, a compression unit that compresses a refrigerant along with rotation of the rotor relative to the stator core, a container that has an internal space in which the stator core and the compression unit are arranged, a winding that is wound around the teeth portion, and an insulating film that is arranged in the slot so as to separate the winding from the stator core, wherein a welding portion that is fixed to the container by welding is formed on a side surface of the yoke portion on an outer diameter side, and a sheet that is sandwiched between the yoke portion and the insulating film is arranged in the slot that corresponds to the welding portion in a circumferential direction of the stator core.

An air pump includes a cylinder, a piston rod, and an upper cover. The cylinder forms an opening at a top end thereof and at least one retaining hole adjacent to the opening. The piston rod is configured to be movable within the cylinder and provided with a piston forming a conical lateral face at one end thereof. The upper cover has a top portion forming a hole for the piston rod to penetrate therethrough, at least one extension portion extended from the top portion, and at least one retaining portion extended from the extension portion. The least one extension portion has an abutting edge selectively abutted against the conical lateral face. The retaining portion is engaged with the retaining hole.