Refrigerant Compressor

Abstract

The invention relates to a hermetically encapsulated refrigeration compressor comprising a hermetically sealed compressor housing containing a piston-cylinder unit compressing a refrigerating agent. The cylinder is closed by means of a valve plate comprising a pressure borehole and a suction borehole, and a suction channel and a pressure channel are used to suck the refrigerating agent into the suction borehole by means of a suction valve, and to compress the refrigerating agent passing from the pressure borehole into the pressure channel by means of a pressure valve. Preferably, a suction sound absorber is arranged in the suction channel. The aim of the invention is to create one such refrigeration compressor that enables a significant decrease in the suction temperature and the exhaust temperature. To this end, the pressure channel is formed by a component that surrounds the entire pressure channel and is connected to the valve plate in a sealed manner along a pressure contact edge formed by an end section of the component. The pressure borehole and the mobile part of the pressure valve are arranged inside the surface surrounded by the pressure contact edge.

1 . A hermetically encapsulated refrigerant compressor having a hermetically sealed compressor housing, in whose interior a piston-cylinder unit, which compresses a refrigerant, operates, whose cylinder housing ( 1 ) is closed using a valve plate ( 2 ) having a pressure hole ( 10 ) and a suction hole ( 16 ), and a suction channel and a pressure channel are provided, via which refrigerant is suctioned via a suction valve ( 32 ) into the suction hole ( 16 ) and is compressed via a pressure valve ( 15 ) from the pressure hole ( 10 ) in the pressure channel, the suction channel being formed by a channel-shaped component ( 9 ) which connects the suction hole ( 16 ) to a preferably provided suction noise damper ( 3 ), wherein the pressure channel is formed by an independent component ( 8 ) completely enveloping the pressure channel, which is tightly connected to the valve plate ( 2 ) along a pressure contact edge ( 13 ) formed by an end section of the component ( 8 ), the pressure hole ( 10 ) and the mobile part of the pressure valve ( 15 ) being situated inside the area enclosed by the pressure contact edge ( 13 ). 
   
   
       2 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein the ratio of the cross-sectional area of the pressure hole ( 10 ) to the area enclosed by the pressure contact edge ( 13 ) is greater than 1/12. 
   
   
       3 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein the area enclosed by the pressure contact edge ( 13 ) exceeds the area of the mobile parts of the pressure valve by less than 50%. 
   
   
       4 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein the component ( 8 ) forming the pressure channel has a section ( 8   a ) directly adjoining the pressure hole ( 10 ) and leading away from the valve plate ( 2 ), and a further section ( 8   b ) adjoining this section ( 8   a ), which runs radially outward in relation to the cylinder hole, preferably at a distance to the valve plate ( 2 ) and preferably parallel thereto. 
   
   
       5 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein the section ( 8   a ) leading away from the valve plate ( 2 ) and/or the further section ( 8   b ) of the pressure channel ( 8 ) is/are manufactured from plastic. 
   
   
       6 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein an insulating material, preferably made of rubber or plastic, is situated between the further section ( 8   b ) and the valve plate ( 2 ). 
   
   
       7 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein the component ( 8 ) forming the pressure channel and the component ( 9 ) forming the suction channel are each manufactured in one piece and/or are preferably manufactured jointly in one piece, the two components ( 8 ,  9 ) manufactured jointly in one piece preferably being in contact along an intermediate wall, but at least along connecting webs. 
   
   
       8 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein the pressure valve ( 15 ) closing the pressure hole ( 10 ) is fastened in the component ( 8 ) forming the pressure channel. 
   
   
       9 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein a pressure chamber ( 8   a ), which does not fall below a predefined minimum volume, is provided in the component ( 8 ) forming the pressure channel. 
   
   
       10 . The hermetically encapsulated refrigerant compressor according to  claim 9 , wherein the pressure chamber ( 8   a ) is situated directly adjoining the pressure hole ( 10 ) in the component ( 8 ) forming the pressure channel. 
   
   
       11 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein a clamping element ( 7 ) is provided, which clamps the valve plate ( 2 ) to the cylinder housing ( 1 ) along at least a section of its circumference, but preferably along the entire circumference. 
   
   
       12 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein the clamping element ( 18 ) has an essentially J-shaped cross-section. 
   
   
       13 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein the clamping element ( 7 ) is implemented as circular. 
   
   
       14 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein one or more undercuts ( 27 ), which may be engaged with an end section of the clamping element ( 7 ), are provided on the cylinder housing ( 1 ). 
   
   
       15 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein the other end section of the clamping element ( 7 ) forms a first clamping section ( 7   b ), which clamps the valve plate ( 2 ) to the cylinder housing ( 1 ). 
   
   
       16 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein the cylinder housing has a shoulder ( 31 ), in which the valve plate ( 16 ) is at least partially countersunk. 
   
   
       17 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein the surface of the valve plate ( 2 ) facing away from the piston ( 4 ) terminates flush with the cylinder housing ( 1 ). 
   
   
       18 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein the clamping element ( 7 ) has at least one further clamping section ( 7   a ), which clamps the components ( 8 ,  9 ) forming the pressure channel and the suction channel to the valve plate ( 2 ) or in the suction hole ( 16 ) and/or the pressure, hole ( 10 ). 
   
   
       19 . The hermetically encapsulated refrigerant compressor according to  claim 11 , wherein a further clamping element ( 29 ) is provided, which may be engaged on the clamping element ( 7 ) and clamps the components ( 8 ,  9 ) forming the pressure channel and the suction channel to the valve plate ( 2 ) or in the suction hole ( 16 ) and/or the pressure hole ( 10 ). 
   
   
       20 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein separate fasteners ( 11 ) are provided and/or a separate fastener ( 7   b ) is provided for fastening the valve plate ( 2 ) to the cylinder housing ( 1 ). 
   
   
       21 . The hermetically encapsulated refrigerant compressor according to  claim 20 , wherein the separate fasteners are screws ( 11 ). 
   
   
       22 . The hermetically encapsulated refrigerant compressor according to  claim 20 , wherein a clamping element is provided, which may be engaged on the cylinder housing ( 3 ) and clamps the components ( 8 ,  9 ) forming the pressure channel respectively the suction channel to the valve plate ( 2 ) or in the suction hole ( 16 ) and/or the pressure hole ( 10 ). 
   
   
       23 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein preferably V-shaped sealing beads ( 23 ) are provided in the valve plate ( 2 ), and the front face, facing toward the valve plate ( 2 ), of the components ( 8 ,  9 ) forming the suction channel and the pressure channel is equipped along its suction or pressure contact edge ( 13 ,  17 ) with sealing projections ( 22 ) essentially corresponding to the V-shaped sealing beads ( 23 ), the sealing projections ( 22 ) being implemented as different in their geometrical design from the sealing beads ( 23 ) and/or having a different volume. 
   
   
       24 . The hermetically encapsulated refrigerant compressor according to  claim 1 , wherein sealing projections ( 22 ) are provided in the valve plate ( 2 ), and the front face, facing toward the valve plate ( 2 ) of the components ( 8 ,  9 ) forming the suction channel and the pressure channel is equipped along its suction or pressure contact edge ( 13 ,  17 ) with sealing beads ( 23 ) essentially corresponding to the sealing projections ( 22 ), the sealing projections ( 22 ) being implemented as different in their geometrical design from sealing beads ( 23 ) and/or having a different volume.