The on-vehicle air-conditioner for air-conditioning of the present invention, comprising a refrigeration circuit provided with a refrigerant car exterior heat exchanger installed for exchanging heat with the car exterior air that can be used for cooling an...

The system (10) comprises a circuit (12) in which a working fluid is subjected to a thermodynamic cycle and a by-pass duct (36) that has one end connected between the compressor (14) and the condenser (16) and the other end connected to the input of the he...

Frost formation at an outdoor heat exchanger of a heat-pump type air-conditioning system is prevented and an improvement in the heating performance is achieved by efficiently utilizing the heat of the engine cooling liquid. An outdoor heat exchanger 5 and ...