A scroll compressor is provided that may include a casing; an electric motor drive having a stator fixed within the casing, and a rotor rotatably provided within the stator; a rotational shaft coupled to the rotor to rotate along with the rotor; a compression device disposed at a lower portion of the electric motor drive to receive a rotational force from the rotational shaft and compress a refrigerant; and an oil storage space located within the casing. A plurality of oil discharge paths to allow oil accumulated at an upper portion thereof to be discharged to the oil storage space may be formed on an outer circumferential surface of the compression device to be separated from each other, and an overall cross-sectional area of the plurality of oil discharge paths may be about 2 to about 12% of an inner diameter cross-sectional area of the casing brought into contact with or separated from an outer circumferential surface of the compression device in the compression device.

A filter system can include a replaceable filter cartridge having a spinner element structured to swirl a mixed flow of compressible fluid and oil, as well as an end cap used to enclose an open interior of a filter media of the filter cartridge. The filter cartridge can be configured to interface with and be supported by a mesh holder. A housing can be attached over the filter cartridge to enclose the system and create a flow path for a mixed flow of compressible fluid and oil. The replaceable filter cartridge can be constructed of materials suitable for disposal in a waste incineration process. The mesh holder can be inserted on a combo-block and secured in place by a compression fitting. A stand pipe can extend into the interior of the filter media and be coupled with a central passage of the mesh holder.

A method of assembling a compressor system includes attaching at least two pulsation damper stages to a discharge port on a compressor, and attaching additional pulsation dampening stages if additional stages are desired. A compressor and discharge system is also disclosed.

A lubricant receptacle for a vacuum pump is provided. The lubricant receptacle comprises a lubricant reservoir, a lubricant separator and an exhaust. A first gas connection is provided between a gas outlet of the lubricant reservoir and a gas inlet of the lubricant separator. For connecting a gas inlet of the lubricant reservoir with the vacuum pump, a second gas connection is provided, while a first lubricant connection is provided for connecting a lubricant outlet of the lubricant reservoir with the vacuum pump. Further, another lubricant connection is provided between a lubricant outlet of the lubricant separator and the lubricant outlet of the lubricant reservoir and/or an additional lubricant connection for connecting the lubricant outlet of the lubricant separator with the vacuum pump is provided. At least one of the gas connections and one of the lubricant connections is selectively coupleable. Furthermore, a vacuum pump system having such a lubricant receptacle and a vacuum pump is provided.

A compressor includes a casing that stores a lubrication oil in a bottom portion, a compression mechanism disposed in the casing, an electric motor disposed above the compression mechanism, a discharge pipe opening in a space in the casing on an upper side of the motor, and an oil drainage mechanism that guides a lubrication oil adhering to an inner wall of the casing to the discharge pipe using a swirling flow generated by rotation of the motor. The oil drainage mechanism includes an oil drain pipe having one end opening in the inner wall of the casing and another end connected to the discharge pipe, and a flow-rate regulating valve disposed at the oil drain pipe. The flow-rate regulating valve has a changeable opening degree. The opening degree of the flow-rate regulating valve is configured to be regulated in accordance with a rotational speed of the motor.

A scroll electric compressor includes a housing, a rotary shaft, an electric motor, a fixed scroll, an orbiting scroll, a compression chamber, a discharge chamber, and an oil storage chamber. The housing has a discharge housing including an end wall, a first peripheral wall, a stepped portion, and a second peripheral wall. The fixed scroll has a flange in contact with the second peripheral wall. The stepped portion, the second peripheral wall, the flange, the outer peripheral wall cooperate to define an annular space around the fixed scroll. The annular space is in communication with the discharge chamber or the oil storage chamber.

A pumping method in a pumping system comprises: a main vacuum pump with a gas inlet port connected to a vacuum chamber and a gas outlet port leading into a conduit before coming out into the gas outlet of the pumping system, a non-return valve positioned in the conduit between the gas outlet port and the gas outlet, and an auxiliary vacuum pump connected in parallel to the non-return valve. The main vacuum pump is activated in order to pump the gases contained in the vacuum chamber through the gas outlet port, simultaneously the auxiliary vacuum pump is activated and continues to operate all the while that the main vacuum pump pumps the gases contained in the vacuum chamber and/or all the while that the main vacuum pump maintains a defined pressure in the vacuum chamber. Also included is a pumping system.

A scroll compressor having a sealed-oil interception structure, comprising: a partition plate unit which has an orifice, and a first sealing surface located at a bottom side of the partition plate unit and surrounding the orifice; a sealing assembly which is arranged below the partition plate unit and comprises a second sealing surface configured to surround a center hole of the sealing assembly, wherein the second sealing surface abuts against the first sealing surface to form a seal that separates a high-pressure side from a low-pressure side; and an oil interception device provided at the orifice of the partition plate unit. The present compressor may re-introduce a part of lubricating oil to an inner part of a scroll and/or to a low-pressure oil pool side, thereby improving the compression performance and operating stability of the compressor, and reducing the oil circulation rate.

[Problem] A scroll compressor is provided which is capable of effectively reducing a pressure loss in a pathway extending from a discharge space to a discharge port.

[Solution] The scroll compressor includes a discharge space 27 formed in a compressing mechanism cover 9 of a housing 11, a discharge hole 26 which is formed in a fixed scroll 21 and discharges a compressed refrigerant to the discharge space, a discharge port 51 which discharges the refrigerant to the outside of the housing, a relief passage 71 which communicates the discharge space and the discharge port with each other, and a differential pressure valve 74 which is provided in the relief passage and opens in accordance with a pressure difference between the discharge space and the discharge port. The relief passage opens in the discharge space above the discharge hole.

A compressor includes a casing that stores lubricating oil in a bottom of the casing, a compression mechanism housed in the casing, a housing that supports the compression mechanism and forms a crank chamber, a first oil return passage arranged to guide the lubricating oil flowing into the crank chamber downward, and a second oil return passage. The first oil return passage is provided with an oil return guide that contracts a flow of the lubricating oil. An upper portion of the casing forms an oil separation space that separates the lubricating oil from a high-pressure refrigerant discharged from the compression mechanism in the oil separation space. The second oil return passage guides the lubricating oil separated in the oil separation space downward, and an outlet of the second oil return passage is disposed near an outlet of the oil return guide.