Plunger piston compressor for refrigerants

Abstract

The invention concerns a plunger piston compressor ( 1 ) for refrigerants, particularly for CO 2 , with a case-like housing, having a compressor block ( 2 ) with a compression section comprising a cylinder ( 13 ) as first housing element and a bottom part ( 3 ) as second housing element, the compressor block ( 2 ) and the bottom part ( 3 ) being connected with each other, and with a motor ( 25 ) with a drive shaft ( 23 ) located in the inner chamber ( 17 ). It is endeavoured to provide a high-pressure refrigerant compressor with a simple design, which is cost effective in manufacturing. For this purpose, it is ensured that the drive shaft ( 23 ) is only supported on one side of the motor ( 25 ).

1 . (canceled)  
   
   
       2 . The compressor according to  claim 20 , wherein the drive shaft is supported on the side of the motor, which is adjacent to the compression section.  
   
   
       3 . The compressor according to  claim 20 , wherein the drive shaft has a counterweight, a connecting rod bearing being located between the counterweight and the bearing.  
   
   
       4 . The compressor according to  claim 20 , wherein in the area of their connection parallel to the drive shaft, the compressor block and the bottom part overlap axially on their whole circumference and that the connection is formed in the overlapping area.  
   
   
       5 . The compressor according to  claim 20 , wherein the connection is free of auxiliary joining parts.  
   
   
       6 . The compressor according to  claim 20 , wherein one of the two housing elements has an outer thread and the other housing element has an inner thread in the overlapping area, the outer thread and the inner thread engaging in each other.  
   
   
       7 . The compressor according to  claim 20 , wherein in the overlapping area, the two housing elements are clamped to each other radially.  
   
   
       8 . The compressor according to  claim 7 , wherein in the overlapping area the radially outer housing element is shrunk-fit or pressed onto the radially inner housing element.  
   
   
       9 . The compressor according to  claim 20 , wherein the radially inner housing element in the overlapping area has a circumferential, radial flange, which radially supports the outside of the housing element located radially outside in the overlapping area, at least in the area of its front end.  
   
   
       10 . The compressor according to  claim 9 , wherein the flange has a conical recess and that the front end of the radially outer housing element in the overlapping area has a correspondingly conically chamfered front side.  
   
   
       11 . The compressor according to  claim 20 , wherein the bottom part is located radially outside in the overlapping area.  
   
   
       12 . The compressor according to  claim 11 , wherein, at least in the overlapping area, the bottom part has an increased wall thickness.  
   
   
       13 . The compressor according to  claim 20 , wherein the compressor block encloses the complete circumference of the cylinder.  
   
   
       14 . The compressor according to  claim 20 , wherein the cylinder has a lateral opening, which is connected with a compression chamber delimited by the cylinder and a piston displaceable in the cylinder, when the piston is in its lower dead point.  
   
   
       15 . The compressor according to  claim 20 , wherein the cylinder is delimited on one front side by a cylinder head, which comprises a suction chamber that is connected with the inner chamber.  
   
   
       16 . The compressor according to  claim 20 , wherein the compressor block and the bottom part are joined by means of welding or soldering, the welding or soldering seam being limited to a radial outer area of the housing.  
   
   
       17 . The compressor according to  claim 20 , wherein the side of the compressor block opposite the motor has a mounting opening closed by a closing plate, through which opening the drive shaft, the counterweights and the connecting rod can be inserted in the inner chamber.  
   
   
       18 . The compressor according to  claim 20 , wherein a glass feed-through is screwed into the compressor block, which is arranged coaxially to the cylinder.  
   
   
       19 . The compressor according to  claim 20 , wherein the connecting rod has an adjustable length.  
   
   
       20 . A plunger piston compressor for refrigerants, particularly for CO 2 , with a case-like housing, having a compressor block with a compression section comprising a cylinder as first housing element and a bottom part as second housing element, the compressor block and the bottom part being connected with each other, and delimiting a closed inner chamber, and with a motor with a drive shaft located in the inner chamber, wherein the drive shaft is only supported on one side of the motor, which is adjacent to the compression section, by a bearing integrally formed in the compressor block, where the drive shaft is loaded on both sides of the bearing, where the motor engages on one side and a crank drive engages on the other side, wherein the bearing is formed as a single bearing element, and where the drive shaft in the area of its upper end has a diameter expansion, with which the drive shaft is axially supported on the housing of the radial bearing, and where the contact point of the crank drive on the drive shaft is adjacent the bearing.