| 摘要 |
PURPOSE:To enable quick warm-up of an engine, by providing a second evaporator for absorbing exhaust heat in a bypass pipe connected to an engine exhaust pipe, and also providing a second condenser for conducting heat-exchange between refrigerant and engine coolant. CONSTITUTION:Heat of exhaust gas in an exhaust pipe 16 is absorbed by refrigerant passing through a second evaporator 18. The refrigerant is circulated in a heat cycle such that refrigerant outlet 18b pipe 20 pipe 15 compressor 2 pipe 3 first selector valve 4 pipe 23 second condenser 22 pipe 24 pipe 7 receiver tank 8 pipe 9 expansion valve 10 pipe 11 second selector valve 12 pipe 19 the second evaporator 18. In this cycle, when the refregerant passes through the second condenser 22, heat-exchange is conducted between the refrigerant and a cooling water flowing in an engine coolant pipe 21 to accelerate an increase in temperature of the cooling water and thereby effect quick warm-up of the engine. |
