| 摘要 |
PURPOSE: A hermetic compressor is provided to prevent the interference of the inner circumference of a cylinder and a oil groove of a piston while a piston driving by forming the other end of the oil groove of a piston with a tapered shape. CONSTITUTION: A hermetic compressor comprises: a driving part(200) which generates driving force; a cylinder(310) wherein the rear end of the cylinder is opened; a piston(320) wherein a compression space is formed between the piston and the cylinder and which reciprocates between the opening surface of the cylinder and the compression space by the driving part; and an oil groove(322) whose maximum height is 20μm or less and which is formed in the outer circumference of the piston with an interval of at least 0.5mm from the rear end of the piston and has a tapered shape. |
