Linear compressor

Abstract

The present invention discloses a compressor including a hermetic container into/from which refrigerant is sucked and discharged, a compression unit provided in the hermetic container and compressing the refrigerant, a motor unit provided in the hermetic container to be connected to the compression unit and driving the compression unit, and one or more irregular reflection portions provided on an outer circumferential surface of the motor unit. The irregular reflection portion repeatedly reflects and dissipates noise and vibration in the compressor to improve the noise reduction effect. In addition, the irregular reflection portion increases the surface area of the motor unit to improve the radiation effect, which results in high efficiency of the entire compressor.

1 . A compressor, comprising:
 a hermetic container into/from which refrigerant is sucked and discharged;   a compression unit provided in the hermetic container and compressing the refrigerant;   a motor unit provided in the hermetic container to be connected to the compression unit and driving the compression unit; and   one or more irregular reflection portions provided on an outer circumferential surface of the motor unit.   
     
     
         2 . The compressor of  claim 1 , wherein the motor unit comprises a rotating shaft, a rotor having the rotating shaft fixed to a center thereof, and a stator installed around the rotor and rotating the rotor by a mutual electromagnetic force,
 wherein the irregular reflection portion is provided on the stator.   
     
     
         3 . The compressor of  claim 2 , wherein the compression unit comprises a cylinder having a compression space in which the refrigerant is compressed, and a piston reciprocated in the compression space and compressing the refrigerant, and the motor unit further comprises a connecting rod converting the rotational motion of the rotating shaft into the linear reciprocating motion of the piston,
 wherein the compressor is a reciprocating compressor.   
     
     
         4 . The compressor of  claim 2 , wherein the irregular reflection portion is integrally formed with an outer circumferential surface of the stator, or separately formed and attached thereto. 
     
     
         5 . The compressor of  claim 1 , wherein the motor unit comprises an inner stator, an outer stator fixed to the circumference of the inner stator to maintain a certain interval, and a permanent magnet maintaining a gap between the inner stator and the outer stator and linearly reciprocated by a mutual electromagnetic force,
 wherein the irregular reflection portion is provided on the outer stator.   
     
     
         6 . The compressor of  claim 5 , wherein the compression unit comprises a fixed member having a compression space in which the refrigerant is compressed, a movable member linearly reciprocated in the fixed member and compressing the refrigerant, and one or more springs installed to elastically support the movable member, and the motor unit further comprises a connection member connecting the permanent magnet to the movable member such that the permanent magnet and the movable member are linearly reciprocated as one body,
 wherein the compressor is a linear compressor.   
     
     
         7 . The compressor of  claim 5 , wherein the irregular reflection portion is integrally formed with an outer circumferential surface of the outer stator, or separately formed and attached thereto. 
     
     
         8 . The compressor of  claim 1 , wherein a spacing is defined between the hermetic container and the irregular reflection portion, and the irregular reflection portion comprises one or more of a groove and a protrusion. 
     
     
         9 . The compressor of  claim 8 , wherein the section of the groove or the protrusion has a curved shape or a polygonal shape. 
     
     
         10 . The compressor of  claim 8 , wherein the irregular reflection portions are formed on the outer circumferential surface of the motor unit to be symmetric. 
     
     
         11 . The compressor of  claim 8 , wherein the grooves or the protrusions of the irregular reflection portion are formed on the outer circumferential surface of the motor unit at regular intervals. 
     
     
         12 . The compressor of  claim 8 , wherein the grooves or the protrusions of the irregular reflection portion are formed on the outer circumferential surface of the motor unit at irregular intervals. 
     
     
         13 . The compressor of  claim 8 , wherein the irregular reflection portion is provided on a plane of the outer circumferential surface of the motor unit. 
     
     
         14 . The compressor of  claim 8 , wherein the compressor is vibrating in the refrigerant-compressing direction and the opposite direction,
 wherein the irregular reflection portion is provided on one or more of the outer circumferential surface of the motor unit which is parallel to the vibration direction of the compressor and the outer circumferential surface of the motor unit which is perpendicular to the vibration direction of the compressor.   
     
     
         15 . The compressor of  claim 14 , wherein the section of the hermetic container cut in the vibration direction of the compressor has a circular or elliptical shape.