| 摘要 |
PURPOSE:To control the capacity of a compressor to be able to response to the fluctuation in load in wide range, by calculating the optimum frequency to dirve an inverter, to the driving commands from a plurality of room units. CONSTITUTION:The capacity of a compressor 6 necessary to each room unit, based on the load to condition the air, obtained from room units 1a-1c such as the difference between the set temperature value and the data from room temperature sensed by room-temperature sensors 3a-3c, and the data from heat exchanger sensors 4a-4c showing the state of heat exchanging, are put into a control unit 8 as driving commands in the state of control demanding frequency data to an inverter 7. The control unit 8 determines the driving frequency to a compressor 6 from the above-mentioned drive commanding signals and the detected signals from an outdoor heat exchanger sensor 11 and a current sensor 12, and gives commands to the inverter 7. In accordance with the data demanding the maximum value amoung the data of control demanding frequency from the room units 1a-1c, and the number of operated room units, the optimum frequency is calculated based on the predetermined data. |
