| 摘要 |
PURPOSE:To enable to perform delicate control, by a method wherein 3 totally- enclosed motor-driven compressors and 2 temperature regulators are combined, and operation combination of the 3 compressors is controlled according to a load and a temperature condition. CONSTITUTION:During low load operation such as intermediate time, with a switch 17 turned ON, a temperature regulator 10 is connected to a high contact 12 or a low contact 11 depending on temperature in a car. When connected to the low contact 11 side, a motor-driven compressor 1 is operated to bring a device into a 1/3 operation, and when to the high contact 12 side, a motor-driven compressor 2 is also operated to bring it into a 2/3 operation state. Thus, 0-1 operation, 1/3 operation, and 2/3 operation are respectively performed. During overload operation, with a switch 18 turned ON, a low contact 15 of a temperature regulator 14 is closed at an ordinary temperature, and the motor-driven compressors 1 and 2 are operated to bring the device into a 2/3 operation state. When temperature is increased and a high contact 16 is closed, a motor-driven compressor 3 is also operated to bring the device into a full operation state. This permits to perform delicate air-conditioning control. |
