A fluid pump, in particular for a temperature management system, of an electric battery-driven motor vehicle or of a hybrid motor vehicle, having at least one first pump assembly configured and provided for pumping a first fluid medium; and at least one second pump assembly configured and provided for pumping a second fluid medium; wherein the first pump assembly and the second pump assembly are provided as orbiter eccentric piston pumps, particularly as two-row orbiter eccentric piston pumps with respectively phase-shifted orbiter eccentric pistons and are coupled with a single drive motor in a drivable manner.

A preheating heat exchanger allows heat exchange between cooling water on an outlet side of an auxiliary cooling heat exchanger and supply water that has passed through a preheating bypass path.

A preheating heat exchanger allows heat exchange between cooling water on an outlet side of an auxiliary cooling heat exchanger and supply water that has passed through a preheating bypass path.

A multistage compressor system with intercooler can include a sealed housing with first and second compressor stages, where the first compressor stage is for receiving refrigerant from outside of the sealed housing, and the second compressor stage is for receiving refrigerant from within the sealed housing. The compressor system can also include a crank for mechanically driving the first compressor stage and/or the second compressor stage, and a heat exchanger outside of the sealed housing for receiving refrigerant from the first compressor stage and exchanging heat with the refrigerant. The compressor system can further include an oil reservoir contained by the sealed housing, where the oil reservoir includes oil for lubricating the crank, receives the refrigerant from the heat exchanger, and exchanges heat with the refrigerant to cool the oil in the oil reservoir, and where the refrigerant can be supplied to the second compressor stage.

A liquid supply type screw compressor that can suppress a rise in temperature of a liquid while reducing work for stirring the liquid is provided. The liquid supply type screw compressor has a male rotor 11A and a female rotor 11B, male-rotor-side working chambers formed at grooves of the male rotor 11A, and female-rotor-side working chambers formed at grooves of the female rotor 11B. In addition, the liquid supply type screw compressor has: a liquid supply nozzle 28 that is arranged on one side in the rotor axial direction which is a low-pressure side of an intersection P at which a high-pressure-side cusp 23 intersects a ridge line L of a trailing lobe tip of the female rotor 11B that defines a female-rotor-side working chamber V5 immediately after a start of delivery, the liquid supply nozzle 28 supplying the liquid to the male-rotor-side working chamber; and a liquid supply nozzle 29 that is arranged on the other side in the rotor axial direction which is a high-pressure side of the intersection P, and supplies the liquid to the male-rotor-side working chamber, and the liquid supply amount of the liquid supply nozzle 29 is made greater than the liquid supply amount of the liquid supply nozzle 28.

A liquid supply type screw compressor that can suppress a rise in temperature of a liquid while reducing work for stirring the liquid is provided. The liquid supply type screw compressor has a male rotor 11A and a female rotor 11B, male-rotor-side working chambers formed at grooves of the male rotor 11A, and female-rotor-side working chambers formed at grooves of the female rotor 11B. In addition, the liquid supply type screw compressor has: a liquid supply nozzle 28 that is arranged on one side in the rotor axial direction which is a low-pressure side of an intersection P at which a high-pressure-side cusp 23 intersects a ridge line L of a trailing lobe tip of the female rotor 11B that defines a female-rotor-side working chamber V5 immediately after a start of delivery, the liquid supply nozzle 28 supplying the liquid to the male-rotor-side working chamber; and a liquid supply nozzle 29 that is arranged on the other side in the rotor axial direction which is a high-pressure side of the intersection P, and supplies the liquid to the male-rotor-side working chamber, and the liquid supply amount of the liquid supply nozzle 29 is made greater than the liquid supply amount of the liquid supply nozzle 28.

A package-type compressor includes a body unit, a controller, a casing, a first cooling air inlet, a second cooling air inlet, a cooling air outlet, a fan duct, a cooling fan, an air cooling type heat exchanger, a machine chamber, and a cooling duct. The cooling duct is provided below the fan duct, the cooling duct causing the cooling air taken in at the second cooling air inlet to flow along the controller toward the suction port of the fan duct. A vertical projection plane of the cooling fan overlaps the machine chamber and the cooling duct.

A package-type compressor includes a body unit, a controller, a casing, a first cooling air inlet, a second cooling air inlet, a cooling air outlet, a fan duct, a cooling fan, an air cooling type heat exchanger, a machine chamber, and a cooling duct. The cooling duct is provided below the fan duct, the cooling duct causing the cooling air taken in at the second cooling air inlet to flow along the controller toward the suction port of the fan duct. A vertical projection plane of the cooling fan overlaps the machine chamber and the cooling duct.

A plurality of scroll compressors with different fixed volume indexes are connected in fluid parallel circuit and configured to selectively operate to maximize isentropic efficiency at different condensing temperatures. Different quantities of scroll compressors of different volume indexes may be selected based upon typical climate or geographic location environmental conditions to attempt to maximize efficiency. A controller may selectively operate different combinations of the compressors of different volume indexes bases up load demands and condensing temperature conditions, which may be determined in a variety of ways.

A plurality of scroll compressors with different fixed volume indexes are connected in fluid parallel circuit and configured to selectively operate to maximize isentropic efficiency at different condensing temperatures. Different quantities of scroll compressors of different volume indexes may be selected based upon typical climate or geographic location environmental conditions to attempt to maximize efficiency. A controller may selectively operate different combinations of the compressors of different volume indexes bases up load demands and condensing temperature conditions, which may be determined in a variety of ways.