Cylinder seat for sealed refrigeration compressor

The utility model relates to a cylinder seat for a sealed refrigeration compressor. The cylinder seat comprises a vertical shaft hole matched with a crankshaft, and a horizontal cylindrical cylinder hole matched with a piston, wherein the upper part (deviated to the shaft hole side) of the cylinder hole is provided with a connecting rod mounting avoiding R groove; an opening end of the mounting avoiding R groove starts from the end face (deviated to the shaft hole side) of the cylinder hole; and the cylinder seat is characterized in that a groove is formed at the bottom (deviated to the shaft hole side) of the cylinder hole; the groove and the connecting rod mounting avoiding R groove are longitudinally symmetrical relative to a central line of the cylinder hole; and the opening end of the groove starts from the end face (deviated to the shaft hole side) of the cylinder hole. The contact area between the piston and the cylinder hole during operation of the air compressor can be reduced, and the operating effi