Sealed compressor and refrigeration device

Abstract

In a sealed compressor ( 100 ) of the present invention, a suction muffler ( 160 ) includes a communication pipe ( 162 ) coupled to a suction hole ( 151 a ) of a valve plate ( 151 ). The communication pipe ( 162 ) extends upward from the suction muffler ( 160 ) toward the other end of a cylinder ( 133 ), and is provided at an upper end thereof with a communication pipe exit section ( 162 a ) which is in communication with the suction hole ( 151 a ). The cylinder head ( 152 ) is formed on a lower portion with a recess ( 152 d ) accommodating the communication pipe exit section ( 162 a ) therein. A gas inflow space ( 152 b ) in the interior of the sealed container is formed between the communication pipe exit section ( 162 ) and a recess ( 152 d ). The gas inflow space ( 152 b ) in the interior of the sealed container is a space which is in communication with a sealed space inside of the sealed container ( 101 ).

1 . A sealed compressor comprising:
 a sealed container having a sealed space inside thereof;   an electric component accommodated in the sealed container; and   a compression component accommodated in the sealed container and driven by the electric component to compress a refrigerant gas,   wherein the compression component includes:   a crankshaft supported such that an axis of the crankshaft extends vertically, the crankshaft being rotated by the electric component;   a piston which is provided such that an axis of the piston crosses an axial direction of the crankshaft and is reciprocatable according to a rotation of the crankshaft;   a cylinder having a compression chamber inside thereof, the piston being reciprocatably inserted into the cylinder through one end of the cylinder;   a valve plate which closes the other end of the cylinder and is provided with a suction hole and a discharge hole;   a cylinder head which is fastened to the other end of the cylinder via the valve plate and has a discharge space inside thereof which is in communication with the discharge hole; and   
       a suction muffler which is located below the cylinder, has a muffling space inside thereof, and includes a communication pipe coupled to the suction hole,
 wherein the communication pipe extends upward from the suction muffler toward the other end of the cylinder and includes a communication pipe exit section at an upper end of the communication pipe such that the communication pipe exit section is in communication with the suction hole, 
 wherein a recess accommodating the communication pipe exit section inside thereof is provided on a lower portion of the cylinder head, and 
 wherein a gas inflow space in an interior of the sealed container is formed between the communication pipe exit section and the recess and is in communication with the sealed space. 
 
     
     
         2 . The sealed compressor according to  claim 1 ,
 wherein when the axial direction of the crankshaft is a longitudinal direction and an axial direction of the piston is a lateral direction,   the gas inflow space in the interior of the sealed container includes a first space located below the discharge space and extending in the lateral direction to face an upper peripheral surface of the communication pipe exit section, and a second space extending in the longitudinal direction to face a side peripheral surface of the communication pipe exit section, and   
       wherein the first space has a thickness larger than a thickness of the second space. 
     
     
         3 . The sealed compressor according to  claim 1 ,
 wherein the communication pipe exit section has an opening section at a tip end, the opening section being inserted into the suction hole.   
     
     
         4 . The sealed compressor according to  claim 1 ,
 wherein the cylinder head is formed with a hollow space on a projection plane formed by projecting the suction hole in the lateral direction to the lower portion of the cylinder head.   
     
     
         5 . The sealed compressor according to  claim 1 ,
 wherein the communication pipe exit section is provided with a heat insulating space isolated from the sealed space, on an outer periphery facing the valve plate, and   a communication hole which provides communication between the heat insulating space and an interior of the communication pipe exit section.   
     
     
         6 . The sealed compressor according to  claim 5 ,
 wherein the suction muffler is molded by use of a resin, and   wherein the heat insulating space is formed integrally with the suction muffler, when the suction muffler is molded.   
     
     
         7 . The sealed compressor according to  claim 1 ,
 being configured to be driven at one of a plurality of operating frequencies.   
     
     
         8 . A refrigeration device comprising a refrigeration circuit configured such that the sealed compressor as recited in  claim 1 , a heat radiator, a pressure-reducing device, and a heat absorbing unit are annularly coupled to each other by use of a pipe.