Hermetic compressor

Abstract

A hermetic compressor includes a hermetic container; a compression unit arranged in the hermetic container that has a refrigerant compression chamber. A drive unit is configured to provide a refrigerant compression and a charger configured to deliver a refrigerant remaining in the hermetic container outside the refrigerant compression chamber into the refrigerant compression chamber. The charger may include a fan configured to rotate upon receiving a driving force from the drive unit, as well as a channel configured to deliver the refrigerant blown by the fan into the refrigerant compression chamber.

1 . A hermetic compressor, comprising: 
 a hermetic container;    a compression unit arranged in the hermetic container and including a refrigerant compression chamber;    a drive unit configured to provide a refrigerant compression power, the drive unit including a low speed motor having at least four poles; and    a charger configured to deliver a refrigerant remaining in the hermetic container outside the refrigerant compression chamber into the refrigerant compression chamber, the charger including, 
 a fan configured to rotate upon receiving a driving force from the drive unit, and  
 a channel configured to deliver the refrigerant blown by the fan into the refrigerant compression chamber.  
   
   
   
       2 . The hermetic compressor according to  claim 1 , wherein: 
 the drive unit includes a stator fixed in the hermetic container, a rotor positioned inside the stator, and a rotating shaft press fitted in the rotor to rotate with the rotor, and    the fan is configured to be mounted to the rotating shaft so that a center axis thereof coincides with a center axis of the rotating shaft.    
   
   
       3 . The hermetic compressor according to  claim 1 , wherein: 
 the drive unit includes a stator fixed in the hermetic container, a rotor positioned inside the stator, and a rotating shaft press fitted in the rotor to rotate with the rotor,    the rotating shaft includes a main shaft section, an eccentric shaft section located at an end of the main shaft section and eccentric to the main shaft section, and a weight balance section interposed between the main shaft section and the eccentric shaft section and configured to compensate for an unbalanced rotating motion of the rotating,    the compression unit further includes a piston reciprocably disposed in the refrigerant compression chamber, and a connecting rod configured to connect the eccentric shaft section to the piston, and    the fan includes a centrifugal fan, and is configured to be mounted around the eccentric shaft section between the weight balance section and the connecting rod so that a center axis of the fan coincides with a center axis of the main shaft section, such that the fan is configured to rotate along with the rotating shaft.    
   
   
       4 . The hermetic compressor according to  claim 3 , wherein the fan is fixed to and supported by the weight balance section.  
   
   
       5 . The hermetic compressor according to  claim 3 , wherein the charger further includes a guiding member mounted around the fan, the guiding member being configured to guide the refrigerant blown by the fan into an entrance of the channel.  
   
   
       6 . The hermetic compressor according to  claim 5 , wherein: 
 the compressor further includes a frame having a central hollow portion configured to rotatably support the main shaft section beneath the weight balance section, and    the guiding member is fixed to and supported by the frame.    
   
   
       7 . The hermetic compressor according to  claim 5 , wherein the guiding member includes: 
 a cylindrical body fitted around the fan; and    a hopper configured to connect the channel to the interior space of the body, the hopper being configured so that an inner cross-sectional area thereof is reduced toward the channel.    
   
   
       8 . The hermetic compressor according to  claim 7 , wherein an insert is formed at a distal end of the hopper such that the insert is configured to be inserted into and caught by the entrance of the channel.  
   
   
       9 . The hermetic compressor according to  claim 8 , wherein an O-ring is interposed between the insert and the hopper to maintain the chamber in an air-tight state.  
   
   
       10 . The hermetic compressor according to  claim 1 , wherein: 
 the compression unit further includes a piston reciprocably disposed in the refrigerant compression chamber, and    the channel is provided with an opening/closing valve configured to control the flow of the refrigerant, to thereby prevent the refrigerant from being supplied from the channel into the refrigerant compression chamber when the piston performs a compression stroke and to supply the refrigerant from the channel into the refrigerant compression chamber when the piston performs a suction stroke.    
   
   
       11 . The hermetic compressor according to  claim 10 , wherein a blowing force of the refrigerant delivered into the refrigerant compression chamber via the channel is smaller than a compression force of the refrigerant in the refrigerant compression chamber.  
   
   
       12 . The hermetic compressor according to  claim 1 , wherein the drive unit includes a four pole motor.  
   
   
       13 . The hermetic compressor according to  claim 1 , wherein the drive unit includes a six pole motor.  
   
   
       14 . A hermetic compressor, comprising: 
 a hermetic container;    means for compressing a refrigerant provided in the hermetic container;    means for providing a compression power to the means for compressing while minimizing noise; and    means for delivering a refrigerant from the hermetic container into the means for compressing.    
   
   
       15 . A hermetic compressor, comprising: 
 at least one hermetic container;    at least one compression unit including a compression chamber and adapted to be arranged in the hermetic container;    at least one motor configured to provide power to the at least one compression unit; and    at least one super-charger, the super-charger including, 
 a super-charge fan configured to rotate, and  
 a super-charge channel configured to deliver refrigerant blown by the super-charge fan into the compression chamber.  
   
   
   
       16 . The hermetic compressor according to  claim 15 , wherein the at least one motor includes a four pole motor.  
   
   
       17 . The hermetic compressor according to  claim 15 , wherein the at least one motor includes a six pole motor.