Passage structure for air compressor

Abstract

A passage structure for an air compressor mainly has a trough extended from inside of a casing that communicates with a second space to increase the contact area of air and the casing. The trough has an outer surface with a plurality of cooling fins located thereon to enhance total heat dissipation effect. The trough forms an additional space to increase air capacity and can reduce noise during compression operation.

1 . A passage structure for an air compressor fastened to a compressing unit, comprising:
 a casing which includes a upper casing and a lower casing;   two spaces including a first space and a second space located in the casing; and   four ports including a first port, a second port, a third port and a fourth port formed on an outer surface of the casing; the first port and the second port being communicated through the first space, the first space communicating with exterior through the first port and the second port; the third port and the fourth port being communicated through the second space, the second space communicating with the exterior through the third port and the fourth port.   
   
   
       2 . The passage structure for an air compressor of  claim 1 , wherein the lower casing has a trough extended from an inner surface thereof to form a housing space. 
   
   
       3 . The passage structure for an air compressor of  claim 2 , wherein the casing has a plurality of cooling fins extended from the outer surface of casing. 
   
   
       4 . The passage structure for an air compressor of  claim 1 , wherein the casing is made from metal, a heat conductive material. 
   
   
       5 . The passage structure for an air compressor of  claim 1 , wherein the first port and the fourth port are formed on the upper casing, and the second port and the third port are formed on the lower casing. 
   
   
       6 . The passage structure for an air compressor of  claim 1 , wherein the upper casing and the lower casing are interposed by a washer to form an airtight sealing. 
   
   
       7 . The passage structure for an air compressor of  claim 6 , wherein the washer has at least one vent communicating with the second space formed between the upper casing and the lower casing. 
   
   
       8 . The passage structure for an air compressor of  claim 1 , wherein the second port and the third port are communicated through a compression chamber of the compressing unit. 
   
   
       9 . The passage structure for an air compressor of  claim 8 , wherein the compression chamber communicates with the exterior through an air suction port and an air discharging port, the air suction port corresponding to the second port, the air discharging port corresponding to the third port.