A heat source unit of a refrigerant cycle apparatus includes a compressor, a pipe, and a fixing member. The compressor includes two or three connection portions of a first connection portion connecting a suction pipe, a second connection portion connecting a discharge pipe, and a third connection portion connecting an injection pipe. The pipe includes a vertical portion. At least a part of the vertical portion extends vertically from each of the two or three connection portions. The fixing member fixes at least two of the vertical portions of two or three of the pipes of the suction pipe, the discharge pipe, and the injection pipe. Each of the connection portions of the pipes fixed by the fixing member is located on a first straight line as seen in a top view.

The present invention provides a vertical, axial flow oil pump (10). The oil pump includes: a casing (11), the casing having a cylindrical shape as a whole and being able to rotate around its own central axis (O); a suction port (12), located at a lower end of the casing in an axial direction, and configured to suck oil into the oil pump; a discharge port (13), located at an upper end of the casing in the axial direction, and configured to discharge the oil from the oil pump to outside; and an impeller (14), provided in and formed integrally with the casing. The impeller rotates together with the casing when the casing rotates, so that the oil is flowed from the suction port to the discharge port. The present invention also provides a scroll compressor having the oil pump.

A rotary pump comprising a housing (1) defining an annular chamber with inlet and outlet ports (12;11), a flexible annular diaphragm (3) forming one side of the chamber spaced opposite an annular wall of the housing (1), and a partition (13) extending across the chamber. The diaphragm (3) comprises an outer surface which engages the annular wall of the housing (1), and an inner surface opposite the first surface, wherein the outer surface is configured to be pressed progressively against the opposite wall of the housing (1), by a rotating means, to force fluid around the chamber. The rotary pump also comprises a reinforcement ring (4) surrounding the rotating means, and which comprises an embedded portion (30) embedded in an inner portion of a central region of the diaphragm (3), and a support portion (34) having a radially outwardly facing surface (35) which faces and supports the inner surface of the diaphragm (3) adjacent to the reinforcement ring (4) during operation of the rotary pump.

The disclosure provides an oil tubing installation assembly and a scroll compressor adopting the same. The oil tubing installation assembly is adapted to be installed into a shell in a vertical direction and includes: a housing on which a vertical oil tubing installation surface and an oil hole located in the oil tubing installation surface are provided; a clip adapted to be installed on the oil tubing installation surface and into the shell along with the housing; and an oil tubing assembly adapted to be installed into the clip in a vertical direction after the housing and the clip have been installed into the shell. The oil tubing assembly includes an oil tubing body and a cuboid-shaped installation block. A through hole is provided in the installation block and the through hole is configured to have a first orifice on the front surface of the installation block and a second orifice on the rear surface of the installation block. The upper end of the oil tubing body is connected to the first orifice. The second orifice is aligned with and fitted to the oil hole after the installation block is installed in place in the clip. In this way, the long oil tubing can be easily installed manually in place even after the housing has been pressed into the shell.

A fluid working system such as a pump for displacing a working fluid such as hydraulic fluid or a motor using a working fluid is provided. The system may have a positive displacement machine which includes one or more working chamber with displacement means such as a cylinder with a reciprocating piston. There are also two or more fluid ports to allow the working fluid to flow into and out of the working chamber. The working fluid flows from one fluid port means to another either being forced to do so when pumped or moving the piston when functioning as an engine. The fluid working system has associated therewith a non-dead compliance volume of a material such as syntactic foam. This compliance volume acts to smooth any pressure fluctuations within the working fluid system.

A scroll compressor includes an oil circulation pipe having one end inserted through a casing to be connected to an oil storage space inside the casing and another end connected to a suction passage for supplying refrigerant from outside of the casing to a compression chamber, an oil circulation valve disposed between the both ends of the oil circulation pipe to selectively open or close the oil circulation pipe, and a controller to control an opening or closing operation of the oil circulation pipe to reduce or eliminate frictional loss due to a shortage of oil by adjusting an oil level of the oil storage space at an initial operation.

A compressor may include a shell, first and second scroll members, a floating seal, a muffler plate, and a wear ring. The shell defines a discharge chamber and a suction chamber. The floating seal may sealingly engage the second scroll member. The muffler plate defines the discharge chamber and the suction chamber. The wear ring may sealingly engage the muffler plate and the floating seal such that the wear ring, the muffler plate, and the floating seal fluidly isolate the discharge chamber from the suction chamber. The muffler plate may include an axially facing surface that contacts the wear ring. The axially facing surface may include an annular recess. The wear ring may at least partially cover the annular recess. The annular recess may provide clearance between the muffler plate and the wear ring to allow the wear ring to deflect relative to the muffler plate during compressor operation.

A liquid pump of the present disclosure includes a container, a shaft, a bearing, a pump mechanism, a storage space, and a liquid supply passage. The shaft is disposed in the container. The bearing supports the shaft. The pump mechanism pumps a liquid by rotation of the shaft. The storage space is defined in the container at a position outside the pump mechanism. The storage space stores the liquid to be taken into the pump mechanism or the liquid to be discharged to outside of the container after being expelled from the pump mechanism. The liquid supply passage is a flow path including an inlet open to the storage space and supplying the liquid stored in the storage space to the bearing.

A device for compression of a gaseous fluid, in particular of a refrigerant. The device comprises a housing with a suction pressure chamber and a high pressure chamber, a compression mechanism as well as a configuration developed in the proximity of the high pressure chamber, for the separation of a control mass flow from a fluid-lubricant mixture for the control of the compression mechanism. The configuration is developed and disposed with a first flow duct for diverting a main mass flow of the compressed fluid-lubricant mixture from the device and a second flow duct for conducting the control mass flow within the device to the suction pressure chamber in such manner as to separate a mass flow of the gaseous fluid as a control mass flow. A method for the separation of a control mass flow is also provided.

The purpose of the present invention is to provide a scroll-type fluid machine for which maintenance can easily be performed in necessary locations, and a maintenance method for said fluid machine. The present invention provides a scroll-type fluid machined characterized by being provided with a main body unit for compressing a fluid, and a motor unit for driving the main body unit; the main body unit having a fixed scroll, a revolving scroll, a main body casing, and an autorotation-preventing mechanism that is held by the revolving scroll and the main body casing and that prevents autorotation of the revolving scroll; the motor unit having a rotor, a stator for causing the rotor to rotate, a shaft that rotates integrally with the rotor, a motor cover for housing the rotor and the stator, and a main bearing that is secured to the interior by the motor cover and that supports the shaft; a distal end of the shaft having an eccentric part; the main body unit and the motor unit being connected via the eccentric part; and the main body casing and the motor cover being fastened by a fastening member.