| 摘要 |
PURPOSE:To contrive to reduce the power consumption by a method wherein the rotational frequency of a motor-driven compressor is controlled in a range from the maximum to the minimum rotational frequency of the motor-driven compressor when detected air conditioning load is higher than a certain fixed level, while being controlled in the range from the minimum rotational frequency to zero (the stop) of the motor-driven compressor or in the manner of intermittent drive when lower. CONSTITUTION:During air conditioning drive, both outputs of a room temperature sensor 1 and a target room temperature setter 2 are compared with each other at a temperature deviation sensor 3 in order to obtain the rotational speed of the motor- driven compressor 7 at a speed signal generator 4 in response to the temperature deviation. Furthermore, the level of a temperature deviation signal is compared at an intermittent control signal generator 5, which outputs an operation instruction when the level of the temperature deviation signal is higher than a certain fixed level, while outputting a stop instruction when lower. In addition, said rotational speed signal is sent through a speed control signal comparator-selector 6 to the motor-driven compressor 7 when the operation instruction is generated. Said generator 4 forms rotational speed signals to drive the equipment at a speed variable between the minimum rotational frequency and the maximum rotational frequency of the motor-driven compressor 7. |
