Vehicle cooling circuit for cooling a temperature increasing device by means of a coolant

A heat generating device (11) uses a coolant. A radiator (12) is coupled up in parallel or series. A coolant pump (13) operates in a circuit alongside a heat exchanger (14) fitted between the temperature-increasing device and a radiator and coupled to a heating pump circuit. Regarding the flow direction (15) of the coolant, the heat exchanger lies downstream to the radiator and upstream to the temperature-increasing device.