| 摘要 |
PROBLEM TO BE SOLVED: To prevent a liquid compression or a refrigerant amount short. SOLUTION: Liquid lines 5LA, 5LB and gas lines 5GA, 5GB are respectively connected to main liquid lines 4L and main gas line 4G to connect a master outdoor unit 2A and a slave outdoor unit 2B in parallel. A gas stop valve V2 for fully closing when heating of the unit 2B is stopped is provided at the line 5GB of the unit 2B side. A liquid stop valve V1 for fully closing when cooling and heating are stopped at the unit 2B is provided at the line 5LB of the unit 2B side. Liquid passages 53, 54 of the lines 5LA, 5LB, gas passages 57, 58 of the lines 5GA, 5GB, main liquid passage 42 of the line 4L, main gas passage 44 of the line 4G, the valve V2, and the valve V1 are constituted at a piping unit 11. |
