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.

A compressor comprises a first cylinder for compressing a fluid and a second cylinder for driving a piston in the first cylinder. The first cylinder comprises a chamber configured to receive the fluid. The piston is reciprocally movable in the chamber for compressing the fluid. The chamber comprises four ports at the first end including two inlet ports and two outlet ports with a check valve is connected to each port. Each of the four ports is slanted such that the plurality of check valves and inlet and outlet conduits are spaced apart from the second cylinder. The compressor further comprises an inlet conduit to supply the fluid from a fluid source to the chamber through the inlet ports and an outlet conduit for receiving fluid from the chamber through the outlet ports.

A connecting device includes a substantially cylindrical or tubular body provided, at one of its ends, with an outer perimeter projection and co-operative with a duct of channel of a cylinder cap. The device is preferably producible with steel aluminum alloy, or another metal alloy with similar structural and thermal properties mainly due to the stresses it may suffer during use. The device is configured to be able to absorb tolerance variations and to have a resilience capable of providing resistance at the time when a connection undergoes mechanical stresses of performance, especially torsion.

Provided is a molding method of a sealing cover, realized by setting up a sealing cover mold, the mold includes a cavity and a core group arranged in the cavity, including setting up a first core and a second core, the mold opening direction of the first core and the second core are not parallel. The present application does not need a process hole to perform the injection molding of the sealing cover with a fastening structure, whose sealing is also better.

Air compressor 10 for a vehicle, including at least one cooling duct 30 arranged to convey air from outside of the compressor 10, alongside a sealable chamber 28 containing a motor 22, alongside a cylinder 12, and through a cylinder head 18 to emit from at least one exhaust 32 spaced from an air inlet 20, and a fan 34 operable to impel air through the, or each, cooling duct 30. Alternatively or additionally, the compressor 10 includes a sensor 56 arranged to sense a critical parameter of the compressor 10, and a controller in communication with the motor 22 and the sensor 56, the controller configured to control operation of the motor 22 to adjust a rotational speed of a shaft 24 responsive to receiving a sensed value from the sensor 56.

A piston of an air compressor is actuated by a motor to move in a cylinder. The piston includes a head, an air stop sheet having a first bending section which is a boundary line of an acting area and a positioning zone of the air stop sheet, and a back surface of the acting zone backing the top of the cylinder turns on relative to a plane of a top of the head at an open angle θ1. The acting zone has a noncircular spacing groove, a neck, and a second bending section. The head includes a piston rod having a cavity, an air conduit, a column, and a spring. The air stop sheet is forced by the spring to locate in the acting zone backing the cylinder and a plane of a top of the head at an open angle θ1.

An air compressor contains a piston actuated by a motor to move in a cylinder. The piston includes an air stop sheet mounted on a top support plate thereof. The air stop sheet includes a bending section having a positioning zone and an acting zone located opposite to the positioning zone and configured to cover an air channel of the piston. The bending section is a boundary axis of the acting area and the positioning zone of the air stop sheet so that a top of the air stop sheet facing the cylinder forms an obtuse angle less than 180 degrees, and a back surface of the acting zone of the air stop sheet backing a top of the cylinder turns on relative to a plane of a top of the top support plate at an open angle θ, thus producing an air flowing space.

The present relation relates to the technological field of compressors. Problem to be solved: The current reciprocating compressors valves arrangements includes valves whose flexion area suffer from direct interference of the body disposed immediately over said valve. Such feature, besides damaging de valve movement, further causes wear phenomena on the flexion areas of the valve, which can result in critical fault of the valve and consequently of the compressor. Resolution of the problem: It is revealed a valve arrange whose end valve capable of moving includes a flexion area previously defined and intentionally misaligned with any contact area of the body immediately disposed over the valve.

The present invention belongs to the technological field of compressors for cooling systems and, according to a preferred embodiment of the present invention, the connecting device a substantially cylindrical or tubular body provided, at one of its ends, with an outer perimetral projection and co-operative with a duct or channel of a cylinder cap, wherein, preferably, the device will be produced with steel, aluminum alloy, or other metal alloy with similar structural and thermal properties, mainly due to the stresses it may suffer during use and to be able to absorb the tolerance variations and to have a resilience capable of providing resistance at the time the connection undergoes mechanical stresses of performance—especially torsion.