Heat exchanger tube

Abstract

A heat exchanger tube which, while preventing the increased flow resistance when the medium flows, can enhance the heat radiation performance, is provided. The heat exchanger tube 1 includes an upstream side linear flow path part 4 A and a downstream side linear flow path part 4 B connecting an entrance part 2 and exist part 3 to each other and enabling the medium to flow therethrough, wherein at least one of the upstream side flow path part 4 A and downstream side flow path part 4 B includes, within the flow path of the medium, wave-shaped portions 5 a, 5 b, 5 c, 5 d extending in the longitudinal direction of the tube and continuing with each other for guiding the medium.

1 . A heat exchanger tube comprising:
 an entrance part for a medium;   an exit part for the medium; and   an upstream side linear flow path part and a downstream side linear flow path part connecting the entrance and exist parts to each other and enabling the medium to flow therethrough, wherein:   at least one of the upstream side and downstream side flow path parts includes, within the flow path of the medium, wave-shaped portions extending in the longitudinal direction of the tube and continuing with each other for guiding the medium; and   the medium flows flow path parts defined by the wave-shaped portions and located next to each other.   
     
     
         2 . The heat exchanger tube according to  claim 1 , wherein
 the wave-shaped portions are projecting portions projecting inwardly of the tube.   
     
     
         3 . The heat exchanger tube according to  claim 2 , wherein
 the wave-shaped projecting portions are inner fins.   
     
     
         4 . The heat exchanger tube according to  claim 1 , wherein
 the entrance and exit parts are arranged on one end side of the tube, the tube includes, on the other end side thereof, a U-turn flow path part for connecting the upstream side and downstream side linear flow path parts to each other, and the U-turn path part includes an arc-shaped projecting portion projecting inwardly of the tube and continuing with the wave-shaped portion formed at least in one of the upstream side and downstream side linear flow path parts.   
     
     
         5 . The heat exchanger tube according to  claim 1 , wherein
 the wave-shaped portion is constituted of multiple wave-shaped portions arranged in the thickness direction of the tube.   
     
     
         6 . The heat exchanger tube according to  claim 5 , wherein
 a pair of the wave-shaped portions are so arranged as to be situated at the same position and such wave-shaped portions are opposed to each other continuously.   
     
     
         7 . The heat exchanger tube according to  claim 5 , wherein
 only the partial sections of the paired wave-shaped portions cross each other and only such partial sections are opposed to each other.   
     
     
         8 . The heat exchanger tube according to  claim 5 , wherein
 the paired wave-shaped portions are parallel arranged alternately.   
     
     
         9 . The heat exchanger tube according to  claim 4 , wherein
 the end of a U-turn portion of the U-turn flow path part straddles inwardly the end of a partition part for separating the upstream side and downstream side flow path parts from each other.   
     
     
         10 . The heat exchanger tube according to  claim 1 , wherein:
 the medium flowing within the tube is cooling water; and   the heat exchanger tube is the tube of a water-cooling type charge air cooler for allowing the cooling water and compressed air flowing outside the tube to exchange heat with each other to thereby cool the compressed air.   
     
     
         11 . The heat exchanger tube according to  claim 5 , wherein
 phases corresponding to shapes of the wave-shaped portions, located next to each other in the thickness direction of the tube, are offset from each other.   
     
     
         12 . The heat exchanger tube according to  claim 5 , wherein
 phases corresponding to shapes of the wave-shaped portions, located next to each other in the thickness direction of the tube, have an opposite-phase relation with each other.