| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioning outdoor machine capable of preventing the back flow of a refrigerant from an intermediate pressure injection port, keeping a proper amount of refrigerant circulated in an auxiliary evaporator, and preventing the waste of energy in a compressor. SOLUTION: In this outdoor machine 20, a channel 51 at the downstream of the auxiliary evaporator 22 is divided into a channel 52 and a channel 53. The channel 52 has a switch valve 41 and a decompression valve 42 connected in series, and joined with a channel from a four-way valve 26 to an accumulator 27. The channel 53 is connected to a part composed of check valves 43, 44, switch valves 45, 46, a capillary 47 and throttle 48 through the accumulator 28, and further connected to the intermediate pressure injection port 23c. The check valves 43, 44 are respectively connected in the directions different from each other, and the switch valves 45, 46 respectively control the communication. COPYRIGHT: (C)2004,JPO&NCIPI |
