| 摘要 |
PURPOSE:To obtain multiple air conditioners, capable of switching cooling into heating by any indoor unit, by a method wherein the indoor unit is provided with a transmitting means, transmitting the signals of a temperature difference between a room temperature and a reference temperature, an operation mode and the like to an outdoor unit, an operating mode selection control means. CONSTITUTION:Respective indoor units 2A, 2B,... are provided with operation mode selecting means 3SA, 3SB,.... An outdoor unit 1 incorporates operating mode signals, sent from respective indoor units 2A, 2B,... through transmitting means 9, a temperature difference signal between a room temperature and a reference temperature in cooling or heating, and the like into an operation mode selection control means 10. The control means 10 selects preferentially the operation mode of the indoor unit, in which a temperature difference between a set reference temperature and the room temperature is larger when the number of indoor units, set in cooling operation or heating operation, is the same, however, the control means 10 selects preferentially the operating mode, which is more in the number thereof, when the number of the indoor units set to cooling operation or heating operation is not the same while a compressor C, a four-way valve 1V and solenoid valves VA, VB are controlled to effect the ventilating operation of the indoor unit, set so as to effect an operation mode except the cooling operation mode or the heating operation mode. According to this method, the mode is preferenced in accordance with the degree of necessity.
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