Double tube type heat exchange pipe

Abstract

Provided is a double tube type heat exchange pipe, in which a gas or liquid coolant passes through a flow path hole to cool an inner tube, the gas or liquid coolant supplied through through-holes of an outer tube is collected in a first collecting groove formed in an inner tube, the gas and liquid coolant is guided to a spiral groove of the inner tube and continuously collides with a plurality of protrusions to undergo heat exchange and be cooled, and the cooled gas and liquid coolant is collected in a second collecting groove of the inner tube to be discharged to the outside via the through-hole of the outer tube.

1 . A double tube type heat exchange pipe comprising:
 a hollow inner tube ( 100 ) having a flow path hole ( 101 ) through which a gas or liquid coolant passes, an annular spiral groove ( 102 ) formed at an outer surface thereof in a longitudinal direction at predetermined intervals, a plurality of protrusions ( 103 ) protruding along the spiral groove ( 102 ), and first and second collecting grooves ( 104   a,    104   b ) formed at both ends of the spiral groove ( 102 ) and in which the gas or liquid coolant is collected; and   a hollow outer tube ( 200 ) adhered to an outer surface of the inner tube ( 100 ) and having through-holes ( 201 ) formed at both ends of an outer circumferential surface thereof and in communication with the first and second collecting grooves ( 104   a,    104   b ) of the inner tube ( 100 ).   
     
     
         2 . The double tube type heat exchange pipe according to  claim 1 , wherein the through-holes ( 201 ) of the outer tube ( 200 ) have diameters smaller than widths of the first and second collecting grooves ( 104 a,  104 b) of the inner tube ( 100 ). 
     
     
         3 . The double tube type heat exchange pipe according to  claim 1 , wherein a plurality of protrusions ( 103 ′) protrude from outer surfaces of the first and second collecting grooves ( 104   a,    104   b ). 
     
     
         4 . The double tube type heat exchange pipe according to  claim 1 , wherein the inner tube ( 100 ) is formed of any one of aluminum, copper and a copper alloy. 
     
     
         5 . The double tube type heat exchange pipe according to  claim 1 , wherein the first and second collecting grooves ( 104   a,    104   b ) have any one of a hemispherical shape, an oval shape, and a polygonal shape. 
     
     
         6 . The double tube type heat exchange pipe according to  claim 1 , wherein the protrusions ( 103 ) have any one of a circular shape, a hemispherical shape, an oval shape, and a polygonal shape. 
     
     
         7 . The double tube type heat exchange pipe according to  claim 3 , wherein the protrusions ( 103 ′) have any one of a circular shape, a hemispherical shape, an oval shape, and a polygonal shape.