| 摘要 |
PURPOSE:To perform optimum air-conditioning according to quantity of solar radiation by correcting a set value for suction pressure of a compressor for increasing delivery capacity when it is detected that quantity of solar radiation is increased while a vehicle is running. CONSTITUTION:A control circuit compares suction pressure, detected by a sensor 10, of a variable capacity type compressor 2 with a set value and operates, and sends a signal to a driving device 1 so as to increase the capacity of the variable capacity type compressor 2 when the suction pressure is higher than the set pressure, and when it is lower on the contrary, the control circuit sends a signal to make the capacity small, and makes cooling ability constant. Also, when a solar radiation sensor senses that quantity of solar radiation is increased, the control circuit corrects the set value for suction pressure to lower side for making capacity of the variable capacity type compressor 2 increase, and makes cooling ability increase by a fixed quantity to control cooling ability. In this way, it is possible to perform optimum correction for cooling ability and to always perform optimum air-conditioning even if quantity of solar radiation changes every moment. |
