Heat exchanger

Abstract

A heat exchanger has an exchanging assembly and a cleaning assembly. The exchanging assembly has multiple exchanging tubes. Each exchanging tube has an outer tube and an inner tube inserted into the outer tube. The cleaning assembly is connected to the exchanging assembly and has a front connecting board, a rear connecting board, a moving board, multiple brushing elements and a drive device. The moving board is mounted movably on the exchanging tubes between the connecting boards. The brushing elements are mounted in the moving board and contact with the exchanging tubes. The drive device is mounted with the connecting boards and the moving board to drive the moving board to move along the exchanging tubes.

1 . A heat exchanger having
 an exchanging assembly having
 multiple exchanging tubes being parallel to each other and each exchanging tube having
 an outer tube being hollow and having
 a mounting end being a closed end; and 
 an exhausting end being an open end; and 
 
 an inner tube bring hollow, being inserted into the outer tube and having
 an outer surface; 
 an outlet end being inserted into the outer tube from the exhausting end, being attached to the outer tube near the mounting end; 
 an inlet end being extended out the outer tube from the exhausting end; and 
 a guiding rib being formed spirally on the outer surface of the inner tube between the inlet end and the exhausting end of the outer tube and contacting with the outer tube; and 
 
 
   a cleaning assembly being connected to the exchanging assembly and having
 a front connecting board being connected securely with the exchanging tubes; 
 a rear connecting board being connected securely with the exchanging tubes and being parallel to the front connecting board; 
 a moving board being mounted movably on the exchanging tubes between the front connecting board and rear connecting board and having multiple mounting holes formed through the moving board; 
 multiple brushing elements being mounted respectively in the mounting holes of the moving board and respectively mounted around and contacting with the exchanging tubes; and 
 a drive device being connected to the connecting boards and the moving board to drive the moving board to move along the exchanging tubes between the front connecting board and the rear connecting board. 
   
   
   
       2 . The heat exchanger as claimed in  claim 1 , wherein
 the front connecting board further has multiple engaging holes formed through the front connecting board;   the rear connecting board further has multiple connecting holes being formed through the rear connecting board and aligning respectively with the engaging holes of the front connecting board;   the mounting ends of the outer tubes being conical shape and respectively inserted into the engaging holes and being connected with the front connecting board; and   the exhausting ends of the outer tubes in the exchanging tubes respectively being mounted in the connecting holes of the rear connecting board.   
   
   
       3 . The heat exchanger as claimed in  claim 1 , wherein
 each mounting hole has an inner thread; and   each brushing element being tubular and further has
 an outer surface; 
 an outer thread being formed on the outer surface, being screwed with the inner thread of a corresponding mounting hole; 
 an inner surface; and 
 a brush being attached on the inner surface, contacting with and mounted around the outer tube of a corresponding exchanging tube. 
   
   
   
       4 . The heat exchanger as claimed in  claim 1 , wherein
 the moving board further has
 two side walls; and 
 two linking boards being respectively mounted on the side walls of the moving board and each linking board having two linking ends; and 
   the drive device has
 a chain wheel device being connected to the connecting boards and the moving board and having
 two driven wheels being mounted on the front connecting board and aligning respectively with the linking boards of the moving board; 
 a drive shaft being mounted on the rear connecting board and having two ends; 
 two transmitting wheels being respectively mounted on the ends of the drive shaft and aligning respectively with the linking boards and the driven wheels; and 
 two chains being respectively engaged with the driven gear wheels and the transmitting gear wheels and each chain having two connecting ends connected to the linking ends of a corresponding linking board; and 
 
 a motor device being mounted on the rear connecting board and having
 a transmitting device being mounted on the rear connecting board and being connected to the drive shaft; and 
 a motor being connected to the transmitting device and mounted on the rear connecting board. 
 
   
   
   
       5 . The heat exchanger as claimed in  claim 1 , wherein the cleaning assembly further has multiple tracking shafts mounted with the connecting boards and the moving board and parallel to the exchanging tubes. 
   
   
       6 . The heat exchanger as claimed in  claim 1 , wherein the cleaning assembly further has a reservoir being mounted on the rear connecting board, connected to the exchanging tubes and having
 a chamber being communicated with the exhausting ends of the outer tubes in the exchanging tubes; and   a dividing board being mounted in the chamber of the reservoir to divide the chamber into two segments and having multiple through holes formed through the dividing board and the inlet ends of the inner tubes being connected respectively with the through holes.   
   
   
       7 . The heat exchanger as claimed in  claim 2 , wherein
 each mounting hole has an inner thread; and   each brushing element being tubular and further has
 an outer surface; 
 an outer thread being formed on the outer surface, being screwed with the inner thread of a corresponding mounting hole; 
 an inner surface; and 
 a brush being attached on the inner surface, contacting with and mounted around the outer tube of a corresponding exchanging tube. 
   
   
   
       8 . The heat exchanger as claimed in  claim 7 , wherein
 the moving board further has
 two side walls; and 
 two linking boards being respectively mounted on the side walls of the moving board and each linking board having two linking ends; and 
   the drive device further has
 a chain wheel device being connected to the connecting boards and the moving board and having
 two driven wheels being respectively mounted on the front connecting board and aligning respectively with the linking boards of the moving board; 
 a drive shaft being mounted on the rear connecting board and having two ends; 
 two transmitting wheels being respectively mounted on the ends of the drive shaft and aligning respectively with the linking boards and the driven wheels; and 
 two chains being respectively engaged with the driven gear wheels and the transmitting gear wheels and each chain having two connecting ends connected to the linking ends of a corresponding linking board; and 
 
 a motor device being mounted on the rear connecting board and having
 a transmitting device being mounted on the rear connecting board and being connected to the drive shaft; and 
 a motor being connected to the transmitting device and mounted on the rear connecting board. 
 
   
   
   
       9 . The heat exchanger as claimed in  claim 8 , wherein the cleaning assembly further has multiple tracking shafts mounted with the connecting boards and the moving board and parallel to the exchanging tubes and the chain wheel device. 
   
   
       10 . The heat exchanger as claimed in  claim 9 , wherein the cleaning assembly further has a reservoir being mounted on the rear connecting board, connected to the exchanging tubes and having
 a chamber being communicated with the exhausting ends of the outer tubes in the exchanging tubes; and   a dividing board being mounted in the chamber of the reservoir to divide the chamber into two segments and having multiple through holes formed through the dividing board and the inlet ends of the inner tubes being connected respectively with the through holes.