Compressor and refrigeration device

A compressor comprising:

• a casing;
• a main frame disposed in the casing, wherein the main frame comprises a guide structure to position and fix the main frame in an inner wall of the casing, the guide structure comprising:
• a guiding cavity, wherein the guiding cavity is disposed in a body of the main frame and an end of the guiding cavity is open;
• and
• a centering cavity, wherein the centering cavity is disposed in the body of the main frame and communicates with the guiding cavity, wherein the centering cavity comprises:
• a first sub-cavity, being disposed in the body of the main frame and communicating with the guiding cavity;
• and
• a second sub-cavity, being disposed between the guiding cavity and the first sub-cavity;
• and
• a rotating shaft, being disposed in the casing,
• wherein the guiding cavity and the centering cavity are distributed along an axis of the rotating shaft,
• wherein an inner wall of the second sub-cavity forms a frustoconical shape oriented with the axis of the rotating shaft,
• wherein an end of the inner wall of the second sub-cavity meets an inner wall of the first sub-cavity extending along a direction perpendicular to the axis of the rotating shaft,
• wherein the main frame further comprises a support structure, being disposed on the body of the main frame and located at a periphery of the guide structure, and wherein the support structure and the guiding cavity are coaxially disposed,
• wherein the guide structure further comprises a relief cavity on an opposite side of the centering cavity to the guiding cavity, and
• a transition between the first sub-cavity of the centering cavity and the relief cavity forms a right angle.