Sealed type compressor

Abstract

In the present invention, resonance chamber ( 128 ) is isolated from the inside of the hermetic container due to a seal portion having flange ( 118 ) disposed at suction muffler ( 110 ) and groove ( 129 ) formed in cylinder head ( 123 ), and the suction pressure pulsation hardly leaks into the hermetic container, thereby enabling the reduction of noise.

1 . A hermetic type compressor comprising: 
 a hermetic container which accommodates stored oil, an electric motor unit, and a compressing unit,    wherein the compressing unit comprises:    a cylinder for storing a reciprocally moving piston, a plate disposed at an end of the cylinder, a suction muffler having a connection pipe communicated to a suction hole in the plate, and a cylinder head disposed at the anti-cylinder side of the plate, and    the cylinder head is formed with a discharge chamber and a resonance chamber which communicates one side opened connection pipe;    a flange is disposed at an outer periphery of the connection pipe;    the cylinder head is provided with a groove at a position corresponding to the flange; and    the flange is fitted in the groove, thereby forming a seal portion.    
     
     
         2 . The hermetic type compressor of  claim 1 , wherein the flange has upper and lower surfaces and an outer periphery.  
     
     
         3 . The hermetic type compressor of any one of claims  1 ,  2 , wherein the flange is generally U-shaped.  
     
     
         4 . The hermetic type compressor of  claim 1 , wherein an oil hole is disposed at the bottom of the suction muffler that is above the seal portion.  
     
     
         5 . The hermetic type compressor of  claim 4 , wherein oil stored at the bottom of the suction muffler drips from the oil hole onto the seal portion.  
     
     
         6 . The hermetic type compressor of  claim 1 , wherein the resonance chamber of the cylinder head has a nearly semi-circular shape arcuately extended to the discharge chamber side.  
     
     
         7 . The hermetic type compressor of any one of claims  1 ,  6 , wherein the connection pipe of the suction muffler is provided with a ring-like seat formed so as to be disposed along an inner wall of the resonance chamber.  
     
     
         8 . The hermetic type compressor of any one of claims  1 ,  6 ,  7 , wherein the suction muffler is provided with an opening formed in the hermetic container, and the resonance frequency of the opening is nearly coincident with the resonance frequency of a resonance muffler configured by the resonance chamber and the ring-like seat disposed along the inner wall of the resonance chamber.  
     
     
         9 . The hermetic type compressor of  claim 1 , wherein the resonance frequency of a plane portion formed in the hermetic container and the resonance frequency of the opening of the suction muffler are independent of each other.