Dual-mode compressor

A dual-mode compressor, comprising:

• a first scroll plate (31) comprising a first scroll wrap (31a), wherein the first scroll wrap (31a) extends spirally around a rotation axis of the first scroll plate (31);
• a second scroll plate (32) comprising a second scroll wrap (32a), wherein the second scroll wrap (32a) extends spirally around a rotation axis of the second scroll plate (32), the second scroll wrap (32a) and the first scroll wrap (31a) define a scroll compression working cavity (3a), and the rotation axis of the second scroll plate (32) is parallel to and staggered with the rotation axis of the first scroll plate (31);
• and
• an impeller (33) comprising a plurality of blades (33a), wherein the plurality of the blades (33a) is arranged and spaced apart from each other in the circumferential direction of the impeller (33), forming a plurality of centrifugal compression flow channels (33d) between adjacent blades, the impeller (33) is fixed and coaxially arranged relative to the second scroll plate (32), an inlet of the centrifugal compression flow channel (33d) is communicated with an outlet of the scroll compression working cavity (3a);
• wherein the dual-mode compressor comprises two mode, one mode is that the working medium leaving the scroll compression cavity (3a) enters the centrifugal compression flow channels (33d) and then flows out of the dual-mode compressor;
• the other mode is that the working medium leaving the scroll compression cavity (3a) directly flows out of the dual-mode compressor.