A refrigeration cycle apparatus, refrigerating machine oil and refrigerant leakage prevention agent. The refrigeration cycle apparatus contains a working fluid which contains a refrigerant composition including a refrigerant and a refrigerating machine oil including resin particles of which D.sub.50 and D.sub.90/D.sub.10 are 2.0 μm to 10.0 μm and 4.0 to 14.0, respectively.

When a controller receives an instruction for a heating operation, the controller switches an operation mode of a refrigeration cycle apparatus between a heating operation mode and an oil recovery operation mode. The heating operation mode is a mode to circulate refrigerant in a refrigerant circuit such that the refrigerant flows through a gas extension pipe in a gas phase state. The oil recovery operation mode is a mode to circulate the refrigerant in the refrigerant circuit such that the refrigerant flows in the gas extension pipe in a gas-liquid two-phase state. The direction in which the refrigerant flows in the gas extension pipe in the oil recovery operation mode is opposite to that in which the refrigerant flows in the gas extension pipe in the heating operation mode.

Disclosed are climate systems and methods for control the climate systems. A climate system includes a refrigerant circuit, a first compressor, a second compressor, a first refrigerant-to-air heat exchanger, a second refrigerant-to-air heat exchanger, and a controller communicatively coupled to the first and second compressors. Respective outlets of the first and second compressors are fluidically coupled to the first refrigerant-to-air heat exchanger, the first refrigerant-to-air heat exchanger is fluidically coupled to the second refrigerant-to-air heat exchanger, and the second refrigerant-to-air heat exchanger is fluidically coupled with respective inlets of the first and second compressors. The fluidic connection between the second refrigerant-to-air heat exchanger and the first and second compressors includes a vertical split that is configured to mitigate or reduce the amount of compressor oil that migrates to dormant components.

A distillation system receives a feed solution to produce residue and distillate. A heat pump includes parts of a first and second heat exchangers, a working fluid, a working fluid compressor, and an expansion device. The working fluid receives available heat energy from the distillate in the second heat exchanger, receives at least some additional heat energy in the working fluid compressor, and releases at least some of that heat energy into the feed solution in the first heat exchanger. The first heat exchanger receives the feed solution, permitting transfer of at least some heat energy into it. A separator receives the feed solution from the first heat exchanger and separates it into the residue and distillate. The second heat exchanger receives the distillate, permitting transfer of at least some heat energy back into the working fluid. And a distillate extractor directs the distillate out of the second heat exchanger.

A compressor module has a compressor housing with a high-pressure chamber and an outlet for a compressed refrigerant, and a separation device, accommodated in the compressor housing, for separating out a lubricant mixed with the refrigerant. The separation device has a hollow-cylindrical separation portion and a funnel-shaped outlet portion for the refrigerant, which outlet portion protrudes into the hollow-cylindrical separation portion, forming an annular space. The separation device, by use of a portion end of the separation portion, sits inside a receptacle in the compressor housing, which receptacle is connected to a lubricant reservoir. The separation device, by means of the outlet portion, at least partially sits inside the outlet. The separation device is securely held in the compressor housing by an interlocking connection such that it is prevented from twisting and/or axial displacement.

A HVAC system that includes a compressor comprising a suction port and a discharge port. Also included is a refrigerant circulating throughout the HVAC system and through the compressor. Further included is a pressure equalization valve fluidly coupling the discharge port of the compressor with the suction port of the compressor, the pressure equalization valve configured to open while the compressor is operating.

A lubricant reservoir for a compressor, which can be part of a system of a heat pump, in particular, a high-temperature heat pump, having a holding chamber for lubricants with at least one holding-chamber cladding element at least partially outwardly limiting the holding chamber, and a temperature controller is integrated into the holding-chamber cladding element and/or arranged on it, wherein a heating and/or cooling medium can flow through the temperature controller, which may achieve an improved life cycle assessment in such a lubricant reservoir compared to the known systems, reduce the production or assembly effort, and enable lubricant cooling and lubricant heating.

A heating, ventilation, air conditioning, and refrigeration (HVACR) system includes a first compressor having a first capacity, a second compressor having a second capacity, a condenser, an expansion device, and an evaporator fluidly connected. The first compressor and the second compressor are arranged in parallel. The first compressor includes a first lubricant sump. The second compressor includes a second lubricant sump. The first lubricant sump is fluidly connected to the second lubricant sump via a lubricant transfer conduit. A flow restrictor is disposed in the lubricant transfer conduit. The flow restrictor is configured to reduce a refrigerant flow between the first compressor and the second compressor.

Disclosed is a screw compressor (100), comprising a screw compressor housing (101), a discharge cavity (113), at least one silencing channel, and at least one adjustment piston, wherein the discharge cavity (113) is defined by at least one part of the screw compressor housing (101); the at least one part of the screw compressor housing (101) defining the discharge cavity (113) forms a wall of the discharge cavity (113); at least one hole is provided in the wall of the discharge cavity (113); the at least one adjustment piston can be inserted into the at least one hole and move therein; the at least one silencing channel is formed by the at least one hole and the at least one adjustment piston, and the at least one silencing channel is in fluid communication with the discharge cavity (113); and the position of the at least one adjustment piston in the at least one hole determines the silencing length of the at least one silencing channel.

A refrigeration system that induces lubricant-liquid refrigerant mixture flow from a flooded or falling film evaporator by means of the lubricant-liquid refrigerant mixture flow adsorbing heat from an electronic component.