HEAT ACCUMULATION TYPE AIR CONDITIONER

PURPOSE:To make the capacity of cold heat releasing side, absorbing the base load of cooling, constant and operate the title device stably by a method wherein a means, detecting the discharging pressure of a refrigerant gas pump upon cooling employing accumulated cold heat, is provided while the discharging pressure of the refrigerant gas pump is controlled so as to be constant by a choking device. CONSTITUTION:A refrigerant pipeline 114 is provided with the discharging pressure detecting means 133 of a refrigerant gas pump 12 while an opening degree regulator 134, regulating the opening degree of a first choking device 6 by the detecting value of the discharging pressure, is connected to the discharging pressure detecting means 133 and the choking device 6. When a valve 14 is closed, valves 7, 8, 20 are opened and a compressor 1 as well as the refrigerant gas pump 12 are operated, the flow of liquid refrigerant, condensed in a heat exchanger 10 for accumulating heat, is joined with refrigerant, whose pressure is reduced in the first choking device 6 of the side of compressor 1, and the refrigerant, whose amount is about two times of the amount upon general cooling operation and/or heat releasing operation, is circulated through a refrigerant circuit series for an indoor unit whereby the capacity of the refrigerant becomes two times. The opening degree of the choking device 6 is regulated by the opening degree regulator 134 so that the detecting value of the discharging pressure detecting means of the refrigerant gas pump 12 becomes constant.