| 摘要 |
PURPOSE:To quicken the rise-up of cooling capacity of a compressor during an operational mode by suppressing as low as possible the temperature rise of an indoor side heat exchanger upon stopping the compressor. CONSTITUTION:By making a first electromagnetic valve 7 into a ''closed'' state upon stopping the compressor 1, a liquid coolant and a gaseous coolant of high temperature and high pressure existing within an outdoor heat exchanger 2 are sealed in a heat exchanger. That is, upon stopping the compressor 1, high and low pressure balance in the freezing cycle is checked, and the outdoor heat exchanger 2 is maintained at a high pressure, and at the same time, the liquid coolant of a high temperature passing through a pressure reducing device 4 prevented from flowing into an indoor heat exchanger 5 to thereby prevent the increase in th temperature of the indoor heat exchanger 5, which has been cooled at the time of actuating the compressor 1. Thereafter, a temperature detector 9 detects an operation starting temperature TH of the compressor 1 and immediately before starting the compressor 1, power is supplied to the coil of a second electromagnetic valve 8 provided in the high and low pressure bypass circuit by an electronic controller 10 to make the second electromagnetic valve 8 into an ''opened'' state. |
