A refrigerant circulation system which circulates CO2-containing refrigerant therethrough includes a compressor which compresses the refrigerant, a motor, a motor speed sensor which detects a rotational speed of the motor, and a control device which controls at least the motor. The motor includes a rotor, a stator, a rotation shaft coupled to the rotor, and slide bearings supporting the rotation shaft and being lubricated using the refrigerant compressed by the compressor, and is configured so that the refrigerant passing through the motor expands after flowing out of the slide bearings and is used for cooling one of the rotor and the stator. The motor further includes a flow rate adjustment mechanism which adjusts a flow rate of the refrigerant. The control device controls the flow rate adjustment mechanism to adjust the flow rate of the refrigerant according to the rotational speed detected by the motor speed sensor.
REFRIGERANT CIRCULATION SYSTEM
31.07.2025
Patent
Elektronische Ressource
Englisch
IPC: | B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht |