Linear compressor

Abstract

A linear compressor having a stator comprising a coil body for generating a magnetic field when electric current is supplied to the stator, and outer cores disposed on the coil body while surrounding the coil body such that a magnetic flux passes therethrough. The coil body is formed in the shape of a hollow cylinder. The coil body is made of wound electric wires. The coil body is provided with a form-maintaining member for maintaining the shape of the coil body, by which the outer cores are supported. An impregnant, such as varnish, is used as the form-maintaining member. The impregnant is penetrated into gaps between electric wires, and is then solidified so that the shape of the coil body is firmly maintained.

1 . A linear compressor comprising: a piston reciprocated in a cylinder for compressing a coolant; a moving member reciprocated along with the piston; and a stator electro-magnetically interacting with the moving member for driving the moving member, wherein the stator comprises: 
 a coil body formed of wound electric wires;    a core disposed on the coil body; and    a form-maintaining member for maintaining the shape of the coil body so that the core is supported by means of the coil body.    
   
   
       2 . The compressor according to  claim 1 , wherein the form-maintaining member is an impregnant penetrated between the electric wires forming the coil body.  
   
   
       3 . The compressor according to  claim 1 , wherein the coil body and the core are fixedly attached to each other with an injection-molded member filled between the coil body and the core by means of injection molding.  
   
   
       4 . The compressor according to  claim 3 , wherein the coil body is formed in the shape of a hollow cylinder, the core comprises a plurality of cores spaced apart from each other along the outer circumference of the coil body, and the injection-molded member is filled between the cores.  
   
   
       5 . The compressor according to  claim 4 , wherein each of the cores is provided at the side thereof opposite to the moving member with a pair of teeth parts, the injection-molded member being filled in a separated space defined between the teeth parts.  
   
   
       6 . The compressor according to  claim 3 , wherein the injection-molded member is formed of a resin material.  
   
   
       7 . The compressor according to  claim 1 , further comprising a protection member disposed between the core body and the coil for protecting the coil body.  
   
   
       8 . The compressor according to  claim 7 , wherein the protection member is made of paper.