Refrigerant e.g. 1, 1, 1, 2-tetrafluoroethane, expansion device for heating, ventilating and/or air-conditioning installation of motor vehicle, has control unit to authorize circulation of refrigerant in channel along one direction

摘要

The device (3) has an expansion unit (24) installed in a circulation channel (14) and controlled by a regulation unit i.e. thermostat bulb (15), depending on a parameter e.g. temperature, of refrigerant circulating in another circulation channel (13). The expansion unit generates circulation of the refrigerant in the former circulation channel along a circulation direction (33). A control unit (28) i.e. valve, authorizes circulation of the refrigerant in the former circulation channel along another circulation direction opposite the former direction. An independent claim is also included for an air-conditioning loop comprising a compressor.