| 摘要 |
PROBLEM TO BE SOLVED: To control the temperature of cooling water without using a wax three-way valve. SOLUTION: A refrigerant circuit includes an auxiliary evaporator 15, and a cooling water circuit includes a main cooling passage for circulating the cooling water passed through an engine 31 to a cooling water pump 39 via an outdoor heat exchanger 19, a sub-cooling passage for circulating the cooling water passed through the engine 31 to the cooling water pump 39 via the auxiliary evaporator 15, and an electric three-way valve 37 sorting the cooling water to the main cooling passage and to the sub-cooling passage. When the temperature of the cooling water is lower than a target temperature, the cooling water is sorted to both the main cooling passage and the sub-cooling passage, based on the temperature difference between the temperature of the cooling water and the target temperature, or the whole quantity of the cooling water is sorted to the sub-cooling passage, and the number of revolutions of the cooling water pump 39 is reduced. COPYRIGHT: (C)2006,JPO&NCIPI |
