| 摘要 |
<p>A multi-connected air conditioning unit and its working method are provided. When an air-side heat exchanger (7) is on and a water-side heat exchanger (6) is off, a four-way valve (5) allows the refrigerant to pass through the air-side heat exchanger (7) so as to realize cooling or heating; when the air-side heat exchanger (7) is off and the water-side heat exchanger (6) is on, the four-way valve (5) allows the refrigerant to pass through the water-side heat exchanger (6) so as to realize total heat recycling; when compressors (2, 3) are all on, a distributor (14) delivers the refrigeration oil separated from oil separators (4, 9) respectively into oil inlet pipes (15), then the refrigeration oil flows into the compressors through suction pipes (16); when one of the compressors is on and the other compressor is off, as the suction pipes (16) are installed vertically, the oil entered the off-state compressor flows back into the distributor (14) due to the gravity, and further flows into the on-state compressor so as to ensure a safe operation.</p> |
