Scroll fluid machine

Abstract

A scroll fluid machine includes a compressor body having a first scroll and a second scroll which form a compression chamber, a cover forming an air guiding space by covers at least a portion of the compressor body, and a blower fan supplying cooling air to at least one of the first scroll and the second scroll. A portion of the cooling air is supercharged into the intake port via the air guiding space whereby satisfactory compression efficiency is achieved with a simple configuration.

1 . A scroll fluid machine comprising:
 a housing;   a fixed scroll which is fixed to the housing and in which a spiral groove formed by a fixed wrap formed on a fixed end plate is blocked by a partition wall that partitions a low-pressure-side compression chamber and a high-pressure-side compression chamber;   a revolving scroll which is accommodated in the housing so as to face the fixed scroll to form the low-pressure-side compression chamber and the high-pressure-side compression chamber together with the fixed scroll and is resolvable supported by a driving shaft;   a cover that forms an air guiding space between the fixed scroll and the cover so that a portion of cooling air supplied to at least one of the fixed scroll and the revolving scroll can be introduced into the air guiding space;   and an intermediate cooler configured to cool pressurized gas discharged from the low-pressure-side compression chamber by heat exchange with the cooling air in the air guiding space so that the cooled pressurized gas is returned to the high-pressure-side compression chamber.   
     
     
         2 . The scroll fluid machine according to  claim 1 , wherein
 the intermediate cooler includes a radiating pipe arranged in the air guiding space so as to connect a low-pressure-side discharge port of the low-pressure-side compression chamber and a high-pressure-side inlet port of the high-pressure-side compression chamber.   
     
     
         3 . The scroll fluid machine according to  claim 2 , wherein
 the radiating pipe is arranged to be folded back on an inner wall of the air guiding space.   
     
     
         4 . The scroll fluid machine according to  claim 3 , wherein
 the radiating pipe is configured such that a plurality of radiating portion extending along the cooling air are connected by a plurality of folded-back portions formed to be lower than the plurality of radiating portions.   
     
     
         5 . The scroll fluid machine according to  claim 2 , wherein
 the low-pressure-side discharge port is disposed on a downstream side of the cooling air as compared to the high-pressure-side inlet port.   
     
     
         6 . The scroll fluid machine according to  claim 1 , wherein
 the scroll fluid machine further includes a discharge pipe through which the pressurized gas discharged from the high-pressure-side compression chamber flows, wherein the discharge pipe is provided so as to penetrate the air guiding space so that the pressurized gas flowing through the discharge pipe is cooled by the cooling air introduced into the air guiding space.   
     
     
         7 . The scroll fluid machine according to  claim 6 , wherein
 a check valve is provided in the discharge pipe.