| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a highly reliable air conditioner preventing freezing of an indoor unit performing cooling operation even when evaporation temperature of an outdoor heat exchanger is declined during operation at low outside air temperature, in heating-centered operation in which the outdoor heat exchanger functions as an evaporator, many of indoor units perform heating operation and part of the indoor units performs cooling operation. <P>SOLUTION: When the heating-centered operation in which the outdoor heat exchanger functions as the evaporator, heating load of the indoor units is large and part of the indoor units performs cooling operation is performed at low outside air temperature, saturated temperature is calculated from pressure detected by an intermediate pressure detection means, and an opening of a fourth throttle valve device is adjusted so that the saturated temperature of the pressure detected by the intermediate pressure detection means exceeds 0°C, so as to prevent freezing of the indoor units. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
