Abstract: An inverter-integrated electric compressor is structured to include a suction refrigeration path (61) for intensively flowing a sucked refrigerant (30) therethrough, such that the suction refrigerant path (61) is provided only in the vicinity of a switching device module (105), which is a main heat source in an inverter device portion (101), so that the sucked refrigerant is concentrated in only the vicinity of the switching device module, which is the main heat source in the inverter device portion. This enables effectively cooling the inverter device portion, with the sucked refrigerant, without involving adjustments of operating conditions for a refrigeration cycle.

Abstract: A refrigerant go-around passage is provided in a housing of a compressor. The passage takes in refrigerant discharged from a compression mechanism into the housing, makes the refrigerant go around an axial line of the compressor and finally returns the refrigerant to the discharge-port side of the housing while separating liquid contained in the refrigerant from the refrigerant by centrifugation or by centrifugation and collision. In the mid portion of the refrigerant go-around passage, a liquid returning port is provided for returning the separated liquid to the housing in such a manner that the liquid returning port has an orientation that has a component in a direction of gravity and that is deviated from a traveling direction of the refrigerant.

Abstract: Lubricating liquid fed from a reservoir to a compression mechanism is collected by a circumferential wall that surrounds the drive shaft of the compression mechanism and rotates synchronously with it immediately after liquid is discharged into the space inside the housing with or without compressed fluid. Liquid is then urged outward under centrifugal force from an outlet formed at a preset axial location of the circumferential wall. Exiting liquid is received by a fixed liquid return cover that surrounds the circumferential wall near its outlet and led back to the reservoir.

Abstract: A refrigerant go-around passage is provided in a housing of a compressor. The passage takes in refrigerant discharged from a compression mechanism into the housing, makes the refrigerant go around an axial line of the compressor and finally returns the refrigerant to the discharge-port side of the housing while separating liquid contained in the refrigerant from the refrigerant by centrifugation or by centrifugation and collision. In the mid portion of the refrigerant go-around passage, a liquid returning port is provided for returning the separated liquid to the housing in such a manner that the liquid returning port has an orientation that has a component in a direction of gravity and that is deviated from a traveling direction of the refrigerant.

Abstract: Lubricating liquid fed from a reservoir to a compression mechanism is collected by a circumferential wall that surrounds the drive shaft of the compression mechanism and rotates synchronously with it immediately after liquid is discharged into the space inside the housing with or without compressed fluid. Liquid is then urged outward under centrifugal force from an outlet formed at a preset axial location of the circumferential wall. Exiting liquid is received by a fixed liquid return cover that surrounds the circumferential wall near its outlet and led back to the reservoir.

Abstract: An air conditioning system includes: a compressor, an outside air heat exchanger, an outside air heat exchanger fan, an expansion valve, an interior heat exchanger, an interior heat exchanger fan, and a four-way switching valve further comprises an outside air induction/venting device provided outside the outside air heat exchanger. A device for switching or opening/closing the air intakes and/or outlet of the outside air heat exchanger are provided in the outside air induction/venting device and are operated to enable the efficient use of waste heat from the drive shaft motor or inside the passenger compartment, and to provide a defrost cycle in the heat pump heating mode.