| 摘要 |
PURPOSE: A hermetic rotary compressor is provided to achieve an improved operation performance of the compressor by decreasing flow channel resistance and increasing volumetric efficiency. CONSTITUTION: A hermetic rotary compressor comprises a closed vessel(21) forming an outer case; a stator(22) fixed to the inner periphery of the closed vessel; a rotor(23) having an upper balance weight(23a) and a lower balance weight(23b) mounted in the rotor; a rotation axis(24) having a concentric section(24b) to be compressively inserted into the rotor, a stepped section(24c), and an eccentric section(24a); a main bearing(25) for accommodating the rotation axis and which has a discharge hole(25a) and a discharge valve(25b) for discharging the compressed refrigerant gas; a cylinder(27) wrapping the eccentric section of the rotation axis; a rolling piston(28) inserted into the eccentric section of the rotation axis; and a vane(30) contacting the outer periphery of the rolling piston and which divides the interior of the cylinder into a high pressure section and a lower pressure section. The main bearing includes a discharge guide groove(31) extended from the bottom surface of the high pressure section toward the outer periphery of the discharge hole of the main bearing, so as to guide discharge of the compressed refrigerant gas.
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