| 摘要 |
PURPOSE:To carry out stable control without impairing the feeling of cooling by temporarily increasing the control gain of a control system after suspending the capacity control of a compressor due to an external factor relating to increase in engine load, etc. CONSTITUTION:In a refrigerant circuit 1, a condenser 3, a receiver 4, an expansion valve 5, and an evaporator 6 are connected in order in the circuit from the discharge side to suction side of a variable displacement compressor 2. On the other hand, a temperature sensor 10 for detecting the discharge port temperature of the evaporator 6, a potentiometer 11 for detecting an accelerator step-in quantity, or an engine load, and a room-temperature target value setting switch 12 are connected to a control device 9. The control device 9 controls the capacity of the compressor 2 via a capacity variable mechanism 8. In this case, at the time of returning to ordinary control accompanying the end of an external factor such as an accelerator step-in quantity, etc., the control gain of a control system is increased for a certain period. |
