| 摘要 |
PURPOSE:To enhance the energy consumption efficiency, reduce the consumption of water in a water tank and obviate unnecessary shut-down of operation for improving the reliability by providing a device which modulates the output frequency of an inverter circuit, which supplies driving power to a variable capacity compressor, according to the air-conditioning load. CONSTITUTION:A desired room temperature is set and start-up operation is carried out at an operating part 19a. Thereby, a controller 50 drives an inverter circuit 20 to start a compressor 16. Then, a fan control switch 41 is adjusted according to the air flow preset by the operating part 19a, so that a fan motor 13 is brought in operation at a high speed or a low speed. The controller calculates the difference between the detected temperature of a room temperature sensor 54 and the set temperature, and controls the output frequency of the inverter circuit 20 according to the calculated temperature difference (air- conditioning load). Thus, the compressor 16 is controlled according to the air- conditioning load and the room temperature can reach the set temperature with a smooth change. |
