Dual-mode compressor

Abstract

Provided is a dual-mode compressor. The dual-mode compressor includes a first scroll plate (31), a second scroll plate (32), and an impeller (33). The first scroll plate (31) and the second scroll plate (32) define a scroll compression working cavity (3a), and the impeller (33) defines a centrifugal compression flow channel (33d). The impeller (33) and the second scroll plate (32) are fixed relative to each other and are arranged coaxially, and the inlet of the centrifugal compression flow channels (33d) is communicated with the outlet of the scroll compression working cavity (3a). Under a larger flow and high compression ratio, the dual-mode compressor can work in the scroll-centrifugal compression mode, so that working medium leaving the scroll compression working cavity (3a) can enter the centrifugal compression flow channel (33d) and then flow out of the dual-mode compressor, thereby solving the problem of low efficiency of a scroll compressor at high compression ratio and the inability of centrifugal compressors to compress gas-liquid mixed working medium. Alternatively, under a low flow condition, the dual-mode compressor can work in the scroll compression mode, so that working medium leaving the scroll compression working cavity (3a) can directly flow out of the dual-mode compressor, thereby solving the problem of low efficiency and instability of a centrifugal compressor at a low flow condition.

Dependencies are inferred from the claim text.