Abstract: A vehicle with a heating/air-conditioning installation has, on the one hand, a heating and air-conditioning apparatus including a heating radiator, an evaporator and an air-distribution device and, on the other hand, a compressor and a condenser. The compressor is an electric compressor. The condenser is cooled by a cooling circuit supplied with a fluid other than air. The electric compressor and the condenser are housed in a space lying between the vertical plane passing through the axle of the front wheels of the vehicle and a vertical plane passing through the back of the seat backs of the front seats.

Abstract: A device for control of an electric motor-driven compressor of an air-conditioning circuit has a control circuit and an inverter for applying a variable frequency to the electric motor for motor speed control. The control circuit includes a potentiometer and a controlled switch and enables a normal-operation mode under the control of the potentiometer as well as a degraded-operation mode in which the speed of the electric motor is a minimum, and a safety mode in which the operation of the electric motor is prevented.