| 摘要 |
The purpose of the present invention is to prevent the leakage of a refrigerant to the indoor unit side even if there occurs, on the indoor unit side, a crack in a pipe, etc. or loosening at a pipe connection section. An air conditioning device (1) is provided with a heat source device (A), indoor units (C, D), and a relay unit (B). The relay unit (B) is provided with: a first branch section (110) having second switching valves (108a, 108b) for connecting utilization-side heat exchangers (105c, 105d) so that the utilization-side heat exchangers (105c, 105d) can be switched to the cooling operation side or the heating operation side, the first branch section (110) connecting the second switching valves (108a, 108b) to first connection pipes (106c, 106d); and a second branch section (111) having third switching valves (124a, 124b) respectively connected to flow regulators (109d), the second branch section (111) connecting the third switching valves (124a, 124b) to second connection pipes (107c, 107d). The third switching valve (124a) connected to the second branch section (111) has a function for detecting a pressure higher than or equal to a predetermined value and release the pressure. |
