Scroll type compressor

Abstract

A scroll type compressor comprises a housing, a fixed scroll member fixed to the housing, a movable scroll member accommodated in the housing, a compression region defined with the fixed scroll member, a discharge port discharging gas from the compression region to a high pressure region, a first seal separating a predetermined region from a low pressure region adjacent to the periphery of the movable scroll member, an oil sump in the housing communicating with the high pressure region, and a passage in the housing extending from said oil sump to said predetermined region and permitting lubricating oil to supply the first seal due to the pressure difference between said predetermined region and the high pressure region. The gas is compressed in the compression region by orbiting the movable scroll member relative to the fixed scroll member.

What is claimed is:  
     
         1 . A scroll type compressor comprising: 
 a housing;    a fixed scroll member fixed to the housing;    a movable scroll member accommodated in the housing and defining a compression region with the fixed scroll member, gas being compressed in the compression region by orbiting the movable scroll member relative to the fixed scroll member;    a discharge port for discharging the gas from the compression region to a high pressure region;    a first seal separating a predetermined region from a low pressure region adjacent to tho periphery of the movable scroll member;    an oil sump in the housing communicating with the high pressure region; and    a passage in the housing extending from said oil sump to said predetermined region, permitting lubricating oil to supply the first seal due to the pressure difference between said predetermined region and the high pressure region.    
     
     
         2 . A scroll type compressor according to  claim 1  further comprising; 
 a second seal disposed between the high pressure region and said predetermined pressure region, wherein pressure in said predetermined region is lower than or equal to the pressure in the high pressure region, and is higher than pressure in the low pressure region  
 
     
     
         3 . A scroll type compressor according to  claim 1  further comprising: 
 a throttle for regulating a flow rate of the gas arranged around an opening of said passage.  
 
     
     
         4 . A scroll type compressor according to  claim 1 , 
 wherein said first seal is disposed in a recess formed in the housing; and    wherein said passage is communicated with said recess.    
     
     
         5 . A scroll type compressor according to  claim 1 , wherein a driving source of the compressor is an electric motor.