| 摘要 |
PURPOSE:To discharge a flowing refrigerant condensed and staying in a high pressure gaseous refrigerant branch pipe into a low pressure gaseous refrigerant branch pipe by a method wherein a bypassing pressure reducing mechanism is connected between the high pressure gaseous refrigerant branch pipe and an indoor heat exchanger, and each of bypassing opening or closing valves is connected between each of connection points between the bypassing pressure reducing mechanisms and the low pressure gaseous refrigerant branch pipe. CONSTITUTION:In the event that an indoor device 2a is stopped and an indoor device 2b performs a heating operation, condensed liquid refrigerant is accumulated in a high pressure gaseous refrigerant pipe 18a from a branch part 18' of a high pressure gaseous refrigerant main pipe 18 to a heating changing-over solenoid opening or closing valve 10a being closed, so that a bypassing solenoid opening or closing valve 12a is opened at a proper time. With such an arrangement, liquid refrigerant is flowed in a low pressure gaseous refrigerant branch pipe 19a through a bypassing capirally 14a and further flowed in a low pressure gaseous refrigerant main pipe 19 and finally discharged out of the outdoor device 1. In addition, condensation and accumulation of the refrigerant flowed from the high pressure gaseous refrigerant branch pipe 18a through capirally tubes 14a, 15a are generated at an indoor heat exchanger 9a of the indoor device 2a being stopped. However, it is possible to flow the liquid refrigerant within the indoor heat exchanger 9a into the low pressure gaseous refrigerant branch pipe 19a through the capirally tube 15a under an opened state of the solenoid valve 12a. |
