Linear compressor

Abstract

A linear compressor having a dynamic vibration-reducing unit, which is provided at a stopper, by which separation of a cylinder block is prevented, for eliminating vibration generated from a hermetically sealed container at a specific frequency band. The dynamic vibration-reducing unit comprises an elastic member disposed at the lower end of the stopper, and a mass member fixed to the bottom part of the elastic member. The elastic member is formed in the shape of a spiral plate. The elastic member is provided at the center part thereof with a through-hole, which corresponds to an opening of the stopper. The elastic member is provided symmetrically at both ends thereof with fixing parts for fixing the mass member. The mass member is formed in the shape of a plate. The mass member is provided at the center part thereof with a hollow part, which corresponds to the through-hole of the elastic member. Through the hollow part of the mass member are inserted supporting parts of the stopper frame. Both sides of the mass member are symmetrical to each other centering on the hollow part so that both ends of the mass member are fixed to the fixing parts of elastic member by means of welding or bolts.

1 . A linear compressor comprising: 
 a hermetically sealed container having an airtight space defined therein;    a cylinder block disposed in the hermetically sealed container, the cylinder block having a compression chamber defined therein;    a stopper frame fixed to the cylinder block;    a stopper disposed in the hermetically sealed container for supporting the stopper frame; and    a dynamic vibration-reducing unit disposed at the stopper for eliminating vibration generated from the hermetically sealed container at a specific frequency band.    
   
   
       2 . The compressor according to  claim 1 , wherein the dynamic vibration-reducing unit comprises: 
 an elastic member fixed to the stopper; and    a mass member fixed to the elastic member.    
   
   
       3 . The compressor according to  claim 2 , wherein one end of the stopper is fixed to the hermetically sealed container, and the stopper is provided at the other end thereof with an opening, through which the stopper frame is inserted, and 
 wherein the elastic member is provided with a through-hole, through which the stopper frame is inserted, the through-hole corresponding to the opening of the stopper.    
   
   
       4 . The compressor according to  claim 3 , wherein the elastic member is formed in the shape of a spiral plate, the through-hole being formed at the center part of the elastic member.  
   
   
       5 . The compressor according to  claim 2 , wherein the mass member is formed in the shape of a plate, and the mass member is provided with a hollow part corresponding to the opening of the stopper.  
   
   
       6 . The compressor according to  claim 5 , wherein both sides of the mass member are symmetrical to each other centering on the hollow part.  
   
   
       7 . The compressor according to  claim 2 , wherein the elastic member is integrally formed with the stopper such that the elastic member is extended from one end of the stopper.  
   
   
       8 . The compressor according to  claim 2 , wherein elastic coefficient of the elastic member and mass of the mass member are set so that a specific frequency transmitted to the hermetically sealed container and an oscillation frequency of the dynamic vibration-reducing unit correspond to each other.