Scroll -Type Compressor

Abstract

A housing forms one portion of a compressor case and supports a bearing for a main shaft has an opening through which gas Is sucked; a suction space extending from the opening to inside of the compressor; a first gas passageway extending from the suction space in the direction of the axis of the main shaft; a second gas passageway connecting the first gas passageway and the space in which the main shaft bearing is disposed. A shell forms the other portion of the compressor case and is fastened to the housing has a third gas passageway connecting the first gas passageway and the internal space of a compression mechanism. The first gas passageway and the third gas passageway are connected to each other further on the outer side of the main shaft in the rotation radius direction than the movable region of the bottom plate of a movable scroll.

1 . A scroll-type compressor comprising:
 a housing which forms one portion of a compressor case and which supports a bearing for a main shaft having an opening through which a gas to be compressed is sucked, a suction space extending with a cylindrical-shape from the opening into the compressor, a first gas passageway extending from the suction space along a rotation axis of the main shaft, and a second gas passageway communicating with the first gas passageway and a space in which the bearing is disposed; and
 a shell which forms the other portion of the compressor case and which is fastened to the housing having a third gas passageway communicating with the first gas passageway and an internal space of a compression mechanism, characterized in that 
 the first gas passageway and the third gas passageway communicate with each other at an outer side than a region where a bottom plate of a movable scroll can move with respect to a direction of a turning radius of the main shaft. 
   
     
     
         2 . The scroll-type compressor according to  claim 1 , wherein the housing has a lubricating oil passageway which is independent from the first gas passageway and communicates with the suction space and the space in which the bearing is disposed. 
     
     
         3 . The scroll-type compressor according to  claim 2 , wherein a porous filling material is filled in a neighborhood of a portion which the suction space and the lubricating oil passageway communicate with each other. 
     
     
         4 . The scroll-type compressor according to  claim 1 , wherein the housing and the shell are fastened with a plurality of fastening means so that the first gas passageway and the third gas passageway communicate with each other in a region between the fastening means which are adjacent to each other. 
     
     
         5 . The scroll-type compressor according to  claim 1 , wherein the suction space extends inward along the turning radius of the main shaft. 
     
     
         6 . The scroll-type compressor according to  claim 1 , wherein the bearing is disposed as opening on a container space where a counterweight is placed. 
     
     
         7 . The scroll-type compressor according to  claim 1 , wherein a fixed scroll is formed integrally with the shell. 
     
     
         8 . The scroll-type compressor according to  claim 1 , wherein a fin structure is formed inside the first gas passageway. 
     
     
         9 . The scroll-type compressor according to  claim 1 , wherein the first gas passageway is formed on a side surface of the suction space. 
     
     
         10 . The scroll-type compressor according to  claim 9 , wherein the suction space extends to a level lower than the first gas passageway in a vertical direction.