CONTROL DEVICE, METHOD, AND PROGRAM, AND MULTI-TYPE AIR CONDITIONING SYSTEM COMPRISING SAME

摘要

A control device (41) that prevents excessive heating, prevents low gas, and intermittently operates fans for indoor units in a thermo-off state. The control device (41) controls the operation of a multi-type air conditioning system (1) in which a plurality of indoor units (7) are connected to an outdoor unit (2), and the flowrate for a refrigerant caused to flow through refrigerant piping is adjusted by the degree of opening of an indoor electric expansion valve (72). When the thermostat is off during warming and when the control unit (41) is performing intermittent operation during which an on-off operation is repeated whereby the fans for the indoor units (7) are operated for a prescribed time and then stopped for a prescribed time, the control unit (41) controls the degree of opening of the indoor electric expansion valve (72) during the off period for the fans for the indoor units (7) so as to be larger than the degree of opening during the on period for the fans for the indoor units (7) and to be no more than the degree of opening for noise reduction.