A belt guard for an air compressor that includes an air compressor silencer. The guard includes a housing that includes a front cover and a back cover, and an accommodation portion. The air compressor silencer is provided inside the housing in the accommodation portion, where the air compressor silencer includes a spirally shaped silencer core, and the spirally shaped silencer core includes at least one spiral chamber comprising a core inlet and a core outlet. Additionally, a compressor installation that includes a motor, a compressor, a belt connected to a compressor shaft of the compressor element and a motor shaft of the motor, and a belt guard that includes a front cover and a back cover, and an accommodation portion, where the compressor silencer is provided inside the housing in the accommodation portion.

A piston of an air compressor contains at least one fixing bolt configured to fix a plane of a top of a head of the piston in at least one air stop sheet. A respective one of the at least one air stop sheet includes at least one bending section and at least one acting zone opposite to the at least one bending section and configured to cover at least one air orifice, and a back surface of the at least one acting zone of the respective one air stop sheet turns on relative to the plane of the top of the head at an open angle θ, thus producing an air flowing space. A pressure of a cylinder balances with atmosphere, and the piston is not stopped by a back-pressure resistance to move smoothly in upward and downward moving strokes after the air stop sheet moves again.

A piston of an air compressor contains at least one fixing bolt configured to fix a plane of a top of a head of the piston in at least one air stop sheet. A respective one air stop sheet includes at least one bending section, an acting zone configured to close at least one air orifice of the head. The head has at least one receiving groove configured to receive a spring, the spring abuts against the respective one air stop sheet, and the acting zone of the respective one air stop sheet backing a top of a cylinder turns on relative to the plane of the head at the open angle θ, thus producing the air flowing space. The air flowing space is in communication with the at least one air orifice so that a pressure of the cylinder balances with atmosphere.

A display structure of a pressure gauge of an air compressor, the air compressor is received in an accommodation box, and a scale portion of the pressure gauge is viewable via a displaying opening of the accommodation box, the pressure gauge includes a cylindrical body which is transparent and is formed in a pen shape, and the pressure gauge includes a colored O-ring configured to indicate a pressure value of the scale portion. The scale portion is not printed on the cylindrical body of the pressure gauge and includes a transparent panel on which the pressure value of the scale portion is marked on an internal face of the transparent panel, and the internal face faces the cylindrical body of the pressure gauge.

A hermetic compressor includes a compressor shell, a terminal provided on the compressor shell, a terminal guard erected on the compressor shell and surrounding the terminal, and a terminal cover mounted to the terminal guard and covering the terminal. A terminal chamber is defined by the compressor shell, the terminal guard, and the terminal cover. Except for at least a body of the terminal, metal portions facing the terminal chamber are generally covered with an insulator such that the metal portions are not exposed to the terminal chamber. The insulator includes an insulating portion that covers an inner surface of the terminal guard.

In a linear motor and the linear compressor having the same according to the present disclosure, a plurality of magnets are coupled to a stator equipped with a winding coil, and a mover core made of magnetic material instead of a permanent magnet is provided on the mover, and by the magnetizing plurality of magnets in the same direction, the motor output can increase by increasing thrust instead of decreasing the centering force for the mover core. In addition, as it is applied to a two-pore motor, it is possible to easily control the mover core and to easily perform an assembly operation and a magnetization operation for the magnet. In addition, as the stator is made of a grain-oriented core, core loss may be reduced and the motor efficiency may be improved.

Pump module for a vacuum apparatus with a flange which can be connected to a vacuum apparatus in a vacuum-tight manner, at least one ion getter pump and at least one volume getter pump, NEG, where the ion getter pump is directly connected to the flange and the NEG is directly connected to the ion getter pump and where the NEG and the flange are arranged separately from each other.

The objective of the present invention is to provide a compressor with which it is possible to simplify the manufacture of a soundproof cover. A compressor (1) is provided in an air conditioning device for an automobile. The compressor (1) is provided with: a main body portion which has a discharge port (12) and which compresses a refrigerant; and a soundproof cover (20) which includes a first cover (30) and a second cover (40), separate from the first cover (30), and inside which an internal space is formed, the main body portion being accommodated in the internal space. The soundproof cover (20) includes, in a part in which the first cover (30) and the second cover (40) face one another: a contacting portion (24) in which the first cover (30) and the second cover (40) are in contact with one another, thereby separating the internal space and an external space outside the soundproof cover (20); and a spaced-apart portion (25) in which the first cover (30) and the second cover (40) are separated from one another to form a first opening (26) connecting the internal space and the external space. The discharge port (12) is inserted through the first opening (26).

A package-type compressor includes a body unit, a controller, a casing, a first cooling air inlet, a second cooling air inlet, a cooling air outlet, a fan duct, a cooling fan, an air cooling type heat exchanger, a machine chamber, and a cooling duct. The cooling duct is provided below the fan duct, the cooling duct causing the cooling air taken in at the second cooling air inlet to flow along the controller toward the suction port of the fan duct. A vertical projection plane of the cooling fan overlaps the machine chamber and the cooling duct.

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.