Various aspects of the present disclosure are directed to cylinder heads for a piston compressor. In one example embodiment, a cylinder head is disclosed including a suction chamber, a pressure chamber spatially separated from the suction chamber, a suction connection communicates with the suction chamber for supplying a compression medium, and a pressure connection communicates with the pressure chamber for discharging the compressed compression medium. The suction connection and/or the pressure connection may be adjusted into at least two positions on the cylinder head.

A portable drill-driven compressor head. A compressor assembly is configured with a drill attachment which harnesses the rotation of a main shaft to pressurize air and deliver such pressurized air through a hose.

A linear compressor includes a hole that is defined in a discharge cover, and is configured such that a portion of a refrigerant discharged through an opened discharge valve is guided to flow to the hole. Accordingly, a discharge passage for the refrigerant used as a gas bearing may be easily defined.

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 bends relative to a plane of a top of the head at an open angle. 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.

A compressor according to an embodiment includes: a cylinder; a piston configured to be reciprocable in the cylinder; a suction space capable of communicating with a working chamber formed by the cylinder and the piston; a discharge space capable of communicating with the working chamber; a partition wall portion disposed so as to surround the working chamber, and separating the suction space and the discharge space; and a cooling medium path formed in the partition wall portion.

A compressor according to an embodiment includes: a discharge valve; a discharge space formed downstream of the discharge valve; a liquid injection hole for injecting a refrigerant liquid into the discharge space; and a heat medium flow path located opposite to the discharge space across a partition wall forming the discharge space.

A compressor may include a housing, a piston, a valve plate, a discharge valve and a head cover. The housing defines a cylinder. The piston is disposed within the housing and is movable within the cylinder. The valve plate is mounted to the housing and may include a discharge passage extending through the valve plate and defined by a discharge valve seat. The discharge valve is movable between a first position in which the discharge valve is seated on the discharge valve seat to restrict fluid flow through the discharge passage and a second position in which the discharge valve is spaced apart from the discharge valve seat to allow fluid flow through the discharge passage. The head cover may include a guide post including a pocket that receives a valve stem of the discharge valve.

Provided is a compressor device, including: a casing in which a motor (armature and movable element) is housed; an output shaft, which projects from the casing, and is configured to be reciprocated by drive of the motor; a piston provided to a projecting end of the output shaft; a cylinder in which the piston is slidably provided to form a compression chamber; and a cylinder head connected to the cylinder. A tubular shield corresponding to a shielding portion configured to cover the cylinder in such a manner as to be separate from the cylinder in a radial direction of the cylinder is provided on an outer periphery side of the cylinder. The cylinder, the cylinder head, and the tubular shield are coupled to be integrated.

The present invention discloses a fast inflating air pump, including a housing, an inflating tube, an inlet tube, a motor, a transmission assembly and a controller housed in the housing. A blower is arranged in the inlet tube for increasing air pressure to the inflating port. A piston is at least partially contained in the inflating tube, and the piston is driven by the motor via the transmission assembly so as to slide back and forth linearly for increasing air pressure in the inflating tube. A one-way valve is installed in the communicating pipe for only allowing air flow into the inflating tube. The controller instructs the motor to drive the piston to slide back and forth in the inflation tube on condition that the blower stops working until the air inflation pressure increases to a predetermined threshold, then the controller instructs the motor to stop operating.

Compressor head fixing device, a compressor and a refrigeration device. The compressor head fixing device includes a cylinder block and a cylinder head cover, the cylinder head cover being connected to the cylinder block by a fastener, the cylinder block being provided with a compression chamber and an assembly hole configured to fix the fastener; a noise reduction chamber, provided on the cylinder block; and a communication passage, provided in the cylinder block and the cylinder head cover, and being in communication with the assembly hole, the noise reduction chamber and the compression chamber. The compressor head fixing device has a compact structure, a length of the exhaust passage is shortened and the exhaust pressure is reduced.