Linear compressor

Abstract

The present invention discloses a linear compressor including: a hermetic container which defines a sealed space where a refrigerant flows in and out and which has an inlet pipe and an outlet pipe; a cylinder provided in the hermetic container and having a compression space therein; a piston linearly reciprocated in the cylinder and compressing the refrigerant of the compression space; a linear motor supplying a driving force to the piston and operating the piston at a set operating frequency; a plurality of support springs elastically supporting an assembly composed of the cylinder, the piston and the linear motor on the bottom surface of the hermetic container; and a loop pipe provided to guide the refrigerant compressed in the compression space to the outlet pipe. As the exciting force exerted on the hermetic container by the loop pipe has an opposite phase to the exciting force exerted on the hermetic container by the support springs, vibration of the assembly can be offset by vibration of the loop pipe through the phase shift, and thus the overall vibration can be reduced.

1 . A linear compressor, comprising:
 a hermetic container which defines a sealed space where a refrigerant flows in and out and which has an inlet pipe and an outlet pipe;   a cylinder provided in the hermetic container and having a compression space therein;   a piston linearly reciprocated in the cylinder and compressing the refrigerant of the compression space;   a linear motor supplying a driving force to the piston and operating the piston at a set operating frequency;   a plurality of support springs elastically supporting an assembly composed of the cylinder, the piston and the linear motor on the bottom surface of the hermetic container; and   a loop pipe provided to guide the refrigerant compressed in the compression space to the outlet pipe,   wherein the exciting force exerted on the hermetic container by the loop pipe has an opposite phase to the exciting force exerted on the hermetic container by the support springs.   
     
     
         2 . The linear compressor of  claim 1 , wherein the natural frequency of the loop pipe is set equal to or lower than the rated operating frequency of the linear motor. 
     
     
         3 . The linear compressor of  claim 2 , wherein the rated operating frequency of the linear motor is set to 60 Hz, and the natural frequency of the loop pipe is set to 50 Hz or less. 
     
     
         4 . A linear compressor, comprising:
 a hermetic container which defines a sealed space where a refrigerant flows in and out;   a cylinder provided in the hermetic container and having a compression space therein;   a piston linearly reciprocated in the cylinder and compressing the refrigerant of the compression space;   a linear motor supplying a driving force to the piston and operating the piston at a set operating frequency;   a support spring elastically supporting an assembly composed of the cylinder, the piston and the linear motor on the bottom surface of the hermetic container; and   a loop pipe provided to guide the refrigerant compressed in the compression space to the outlet pipe,   wherein the rated operating frequency of the linear motor is greater than the natural frequency of the loop pipe.   
     
     
         5 . The linear compressor of  claim 4 , wherein the rated operating frequency of the linear motor is determined in proportion to the natural frequency of the loop pipe.