| 摘要 |
A heat pump air conditioning system for a vehicle, configured so that the system can efficiently use electric power and so that the discharge temperature can be set to an optimal level. During dehumidifying-heating operation in which air (A) for air conditioning passes through a fourth heater exchanger (60) after passing through a third heat exchanger (50), a first blower (80) and a second blower (90) are cooperatively operated by adjusting, according to the voltage supplied to the first blower (80), the voltage supplied to the second blower (90). When the discharge temperature (T1) of the air (A) for air conditioning flowing from a first heat exchanger (20) is higher than a first predetermined temperature and the rotational speed of a refrigerant compressor (10) is minimum, the cooperative operation between the first blower (80) and the second blower (90) is stopped and the electric power to the second blower (90) is adjusted to lower the discharge temperature (T1) to a level lower than a second predetermined temperature. |
