| 摘要 |
<P>PROBLEM TO BE SOLVED: To ensure sufficient cooling capacity easily at low cost even when an indoor unit that always performs a cooling operation is provided in an air conditioning system including a plurality of indoor units. <P>SOLUTION: An indoor unit 3c that always performs a cooling operation includes a gas pipe pressure control kit 100 including a plurality of electromagnetic valves 101a, 101b, and 101c, and by controlling opening/closing of the electromagnetic valves 101a, 101b and 101c according to a suction temperature of a refrigerant, adjusts pressure loss of the refrigerant guided via an indoor heat exchanger 40 through a low-pressure gas pipe 7 to an outdoor unit 1 and adjusts evaporating pressure of the refrigerant in the indoor heat exchanger 40. Thus, even when an outside air temperature is low, the other indoor unit 3 performs the heating operation, and the outdoor unit functions as an evaporator, in the indoor unit 3c that performs the cooling operation, a suction temperature is prevented from dropping to below zero, and the indoor heat exchanger 40 is prevented from freezing. <P>COPYRIGHT: (C)2012,JPO&INPIT |
