HEAT TREATMENT SYSTEM FOR A VEHICLE

The invention relates to a vehicle thermal management system () comprising at least a refrigerant circuit (), a loop () for heat-transfer liquid, and a first heat exchanger () which thermally couples the loop () for heat-transfer liquid with the refrigerant circuit (), the loop () for heat-transfer liquid comprising at least one heat exchanger () configured to dissipate heat energy into a flow () of air, the refrigerant circuit () comprising at least a compression device (), the first heat exchanger (), a refrigerant accumulation device (), a first expansion device () and a second heat exchanger () designed to have passing through it a flow () of interior air sent into the interior of the vehicle, characterized in that the refrigerant circuit () comprises a leg () arranged in parallel with the first expansion device () and with the second heat exchanger (), said leg () comprising a second expansion device () and a third heat exchanger () able to be thermally coupled to at least a component of an electric powertrain of the vehicle.