COOLANT CIRCUIT FOR A VEHICLE

The invention relates to a circuit () for coolant () comprising a main duct (), a first branch (), a second branch () and a third branch (), the main duct () comprising a compression device () and a main heat exchanger () arranged to be traversed by an external air flow (EF), the first branch () comprising a first heat exchanger () thermally coupled to a loop () for heat transfer liquid () and an accumulation device (), the second branch () comprising a second heat exchanger (), the third branch () comprising a third heat exchanger (), characterised in that the first branch () and the second branch () are parallel and meet at a convergence point (), the first branch () and the third branch () meet at a first junction point (). Application to motor vehicles.