Improved tube for a heat exchanger

Abstract

A heat exchanger element includes a tubular body with a wall at least partly delimited by an inner surface and an outer surface. The wall has a twisted shape on a segment of the body. The inner surface has a groove with a shape corresponding to the wall. The groove extends helically over the segment. On the segment, the outer surface has a diameter between 18 and 30 millimeters, the groove has a pitch of less than 3.5 millimeters and a depth such that the ratio of the pitch at a real power between 1.5 and 2.5 to the depth is less than a threshold value close to 24. A heat exchanger, for example of condenser type, can include such an element.

1 - 9 . (canceled) 
     
     
         10 . A heat exchanger element comprising:
 a tubular body with a wall at least partly delimited by an inner surface and an outer surface, the wall having a twisted shape on at least one segment of the body, and the inner surface including at least one groove with a shape corresponding to the wall and extending helically over the segment,   wherein on the segment, the outer surface has a diameter between 18 and 30 millimeters, while the groove has a pitch of less than 3.5 millimeters and a depth such that the ratio of the pitch at a real power between 1.5 and 2.5 to the depth is less than a threshold value close to 24.   
     
     
         11 . An element according to  claim 10 , wherein the real power is close to 1.7. 
     
     
         12 . An element according to  claim 10 , wherein the body has, on at least the segment, an outside diameter between 18 and 26 millimeters. 
     
     
         13 . An element according to  claim 10 , wherein the body has, on at least the segment, an outside diameter between 20 and 26 millimeters. 
     
     
         14 . An element according to  claim 10 , wherein the body has, on at least the segment, an outside diameter between 20 and 23 millimeters. 
     
     
         15 . An element according to  claim 12 , wherein the body has, on at least the segment, an outside diameter close to 18.90, 22.07, or 25.25 millimeters. 
     
     
         16 . An element according to  claim 10 , wherein the pitch is strictly greater than 2 millimeters. 
     
     
         17 . An element according to  claim 10 , wherein the pitch is less than 3 millimeters. 
     
     
         18 . An element according to  claim 10 , wherein the depth is between 0.05 millimeter and 0.6 millimeter. 
     
     
         19 . An element according to  claim 10 , wherein the depth is greater than 0.15 millimeter. 
     
     
         20 . An element according to  claim 10 , wherein the wall has a thickness between 0.4 and 1 millimeter on at least part of the segment. 
     
     
         21 . An element according to  claim 10 , wherein the wall has a thickness close to 0.5 millimeter on at least part of the segment. 
     
     
         22 . A heat exchanger comprising at least one element according to  claim 10 .