SCROLL COMPRESSOR, AIR CONDITIONER, AND BACKPRESSURE ADJUSTMENT METHOD FOR SCROLL COMPRESSOR

摘要

A scroll compressor, an air conditioner, and a backpressure adjustment method for a scroll compressor. The scroll compressor comprises: a mounting support frame (20); a fixed scroll (30); an orbiting scroll (40); a compression cavity (90) provided between the orbiting scroll (40) and the fixed scroll (30); a medium-pressure cavity (100) provided between the orbiting scroll (40) and the mounting support frame (20); low-pressure gas suction cavities (110) provided at the bottom of the mounting support frame (20) and the top of the fixed scroll (30); a first connection channel (50), wherein two ends thereof respectively communicate with the compression cavity (90) and the medium-pressure cavity (100); a first control valve (70) provided on the first connection channel (50); a second connection channel (60), wherein two ends thereof respectively communicate with the medium-pressure cavity (100) and the low-pressure gas suction cavity (110); and a second control valve (80) provided on the second connection channel (60). The scroll compressor can maintain a substantially stable pressure in a backpressure cavity under the same working conditions, such that a pump body is reliably sealed, thereby improving the performance of the compressor. In addition, sealing margins in the compression cavity of the compressor under different working conditions are substantially the same, such that the pump body is reliably sealed, thereby improving the adaptability of the compressor to working conditions, and improving the overall energy efficiency of the compressor.