Abstract:
A linear compressor (10) includes a shell (110) provided with a refrigerant inlet (101); a cylinder (120) provided to an inside of the shell to form a compression space; a piston (130) reciprocating inside the cylinder to compress a refrigerant in the compression space; and a motor assembly (200) providing a driving force to the piston and provided with a permanent magnet (230), wherein the piston includes a piston body (131) having a cylindrical outer circumference and a surface-treated portion (310) which is processed with a material having a set hardness value, and a valve support unit (133) forming an end of the piston body and having a suction hole (133b) suctioning the refrigerant into the compression space, the valve support unit (133) forming a first non-surface-treated portion (133a) which is not surface-treated.
Abstract:
A micro pump is formed on a substrate having a common inlet channel and a common outlet channel by a plurality of pumping elements, each pumping element having an inlet coupled to the common inlet channel and an outlet coupled to the common outlet channel, the inlet and outlet connected by a microfluidic channel, the microfluidic channel comprising a valvular conduit having low fluid flow resistance in a direction from the inlet to the outlet and high fluid flow resistance in a direction from the outlet to the inlet, and an actuating element arranged to cause fluid to be pumped through the microfluidic channel from the inlet to the outlet, wherein the actuating element is based on one or more of piezoelectric, thermal, electrostatic or electromagnetic transduction. A controller is coupled to actuate the actuating elements at mutually staggered relative timing so as to produce a substantially continuous steady flow.
Abstract:
A valve unit for a fluid working machine comprise a valve having a valve member (and optionally a valve seat), a valve actuator coupled to the valve member, and an electronic actuator controller which is integral to the valve unit and configured to actively control the valve actuator to thereby control the valve member.
Abstract:
An object of the present invention is to obtain a high pressure fuel supply pump capable of reducing pressure pulsation that occurs in a low pressure pipe, preventing damage to the low pressure pipe, or reducing noise due to vibrations of the low pressure pipe. The present invention provides a high pressure fuel supply pump of a type in which, from a fuel suction port connected to a low pressure pipe provided upstream of a fuel, a low pressure passage, an electromagnetic suction valve driven by an electromagnetic force, a pressurizing chamber in which the volume thereof is increased or reduced by a plunger that is reciprocatingly moved by being guided by a cylinder, and a discharge valve provided at an outlet of the pressurizing chamber are sequentially arranged, a fuel is sucked to the pressurizing chamber through the electromagnetic suction valve, the amount of a part of the fuel, which is sucked to the pressurizing chamber, to be returned to the low pressure passage side is adjusted so that the amount of the fuel to be discharged through the discharge valve is controlled, and the high pressure fuel supply pump includes a backflow suppression mechanism for suppressing backflow of fuel from the fuel from the fuel suction portion to the low pressure pipe side.
Abstract:
A compressor unit in a portable compressed air source, comprising a reciprocating piston compressor which is driven by a slider crank mechanism and has a piston which is moved in reciprocation in a cylinder, said piston delimiting a compression chamber which has a first dead air volume. The cylinder exit is closed off by a cylinder head with an exhaust valve, and the compression chamber can be connected by a valve to at least one other dead air volume.
Abstract:
The present invention relates to a pump assembly for pumping a fluid lubricant such as grease or oil, the pump assembly comprising: a pump mechanism (120) configured for moving a fluid lubricant; a pneumatic cylinder configured for being powered by an air source, the pneumatic cylinder (160) comprising a movable member (130) for operating the pump mechanism (120), wherein the pump assembly further comprising a switch (140) for detecting a position of the movable member (130); a valve (150) configured for shifting a position of the moveable member (130) upon an activation of the valve (150); and a control unit (1 10) operable connected to the switch (140) and the valve (150), whereby the control unit (1 10) is configured for controlling the activation of the valve (150) in response to a detection of the position of the movable member (130) by the switch (140), such that a pumping effect of the pump mechanism (120) can be controlled. Moreover, the invention relates to a lubrication system including a pump assembly (100).
Abstract:
A micro pump is formed on a substrate having a common inlet channel and a common outlet channel by a plurality of pumping elements, each pumping element having an inlet coupled to the common inlet channel and an outlet coupled to the common outlet channel, the inlet and outlet connected by a microfluidic channel, the microfluidic channel comprising a valvular conduit having low fluid flow resistance in a direction from the inlet to the outlet and high fluid flow resistance in a direction from the outlet to the inlet, and an actuating element arranged to cause fluid to be pumped through the microfluidic channel from the inlet to the outlet, wherein the actuating element is based on one or more of piezoelectric, thermal, electrostatic or electromagnetic transduction. A controller is coupled to actuate the actuating elements at mutually staggered relative timing so as to produce a substantially continuous steady flow.