Heat Exchange Tube, Heat Exchange Tube Manufacturing Method, and Heat Exchanger

Abstract

A heat exchange tube includes a pair of opposed facing surfaces, and an obliquely protruding part formed on at least one of the pair of facing surfaces, wherein a plurality of the obliquely protruding parts are obliquely formed to be alternately opposite in a width direction of a flow path of the heat exchange fluid, and the plurality of the obliquely protruding parts are mutually connected to form connecting parts, and when hp represents a height of the flow path of the heat exchange fluid and Wv represents a width of the obliquely protruding part in a direction orthogonal to the flow direction of the heat exchange fluid in the flow path, Wv/hp being a ratio of the width of the obliquely protruding part to the height of the flow path is equal to or greater than 1.5 and is equal to or smaller than 6.0.

1 .- 16 . (canceled) 
     
     
         17 . A heat exchange tube comprising:
 a pair of opposed facing surfaces on which heat exchange takes place between a first fluid flowing on an outer circumference thereof and a second fluid flowing on an inner circumference thereof;   an obliquely protruding part formed on at least one of the pair of facing surfaces in such a way as to be convex on one of the outer circumference and the inner circumference and concave on the other, the obliquely protruding part being formed obliquely along a flow direction of a heat exchange fluid, the heat exchange fluid being one of the first fluid and the second fluid flowing on the convexly formed side; and   a pair of side surfaces each connecting the pair of facing surfaces to form a flow path of the heat exchange fluid, wherein   a plurality of the obliquely protruding parts are obliquely formed to be alternately opposite in a width direction of a flow path of the heat exchange fluid, and the plurality of the obliquely protruding parts are mutually connected to form connecting parts,   the side surface is formed so as to have a curved surface shape smoothly connecting the pair of facing surfaces, and   when hp represents the height of the flow path of the heat exchange fluid, R represents a curvature radius of the side surface, and Wt represents a distance between the side surface and the obliquely protruding part in a flow path width direction, Wt/hp being a ratio of the distance to a height of the flow path of the heat exchange fluid is equal to or greater than R and is equal to or smaller than 3.0.   
     
     
         18 . The heat exchange tube according to  claim 17 , further comprising:
 an inner wall surface dividing the flow path along the flow direction of the heat exchange fluid, wherein   a distance Wti between the inner wall surface and the obliquely protruding part in the flow path width direction is shorter than the distance Wt between the side surface and the obliquely protruding part in the flow path width direction.   
     
     
         19 . The heat exchange tube according to  claim 17 , wherein
 the connecting part is formed in a curved shape smoothly connecting neighboring plurality of obliquely protruding parts, and   the obliquely protruding part between neighboring connecting parts is linearly formed and is shorter in length than the connecting part.   
     
     
         20 . The heat exchange tube according to  claim 17 , wherein
 when Wv represents a width of the obliquely protruding part in a direction orthogonal to the flow direction of the heat exchange fluid in the flow path, Wv/hp being a ratio of the width of the obliquely protruding part to the height of the flow path is equal to or greater than 1.5 and is equal to or smaller than 6.0.