Abstract: An air-conditioning loop, in which a refrigerant flows, is capable of operating as a heat pump. The air-conditioning loop includes a compressor. The air-conditioning loop further includes a first solenoid valve connected to the compressor, to a radiator, and to an external heat exchanger. The radiator is connected to the external heat exchanger via a first pressure-release device and to an evaporator via a second pressure-release device. The evaporator is connected to the compressor. The external heat exchanger is connected to the compressor and to the evaporator via a second solenoid valve. The external heat exchanger, the first solenoid valve, and the second solenoid valve constitute a unitary part.

Abstract: An air-conditioning loop, in which a refrigerant flows, is capable of operating as a heat pump. The air-conditioning loop includes a compressor. The air-conditioning loop further includes a first solenoid valve connected to the compressor, to a radiator, and to an external heat exchanger. The radiator is connected to the external heat exchanger via a first pressure-release device and to an evaporator via a second pressure-release device. The evaporator is connected to the compressor. The external heat exchanger is connected to the compressor and to the evaporator via a second solenoid valve. The external heat exchanger, the first solenoid valve, and the second solenoid valve constitute a unitary part.

Abstract: The invention relates to a heating, ventilating and/or air conditioning system with a main air conditioning loop (10) for a refrigerant including at least one compressor (11), a condenser (12), an expansion device (13) and an evaporator (14), a cold storage heat exchanger (21) suitable for storing cold during operation of the compressor (11), and a secondary air-conditioning loop (20a) comprising the cold storage heat exchanger (21). The secondary air-conditioning loop (20a) is suitable to cool the evaporator (14) when the compressor (11) is out of operation. The secondary air-conditioning loop (20a) includes a fluid circulation branch disposed in parallel with a main air conditioning loop (10) common section including at least the evaporator (14). The fluid circulation branch contains a cold production element (21) able to cool the refrigerant toward the evaporator. The invention is particularly dedicated to heating, ventilating and/or air conditioning systems in “Stop and Start” cars.