Turn-fin tube, manufacturing apparatus of the turn-fin tube, manufacturing method of the turn-fin tube and turn-fin type heat exchanger using the turn-fin tube

Abstract

A turn-fin tube, a turn-fin type heat exchanger using the same, and an apparatus and method for manufacturing the same are provided. The turn-fin tube includes a tube in which a fluid flows, and a fin wound on an outer surface of the tube in a helical shape. The fin includes a base section wound on an outer surface in contact with the tube, and an extension section extending from the base section in an outward direction of the tube at a predetermined angle.

1 - 18 . (canceled) 
     
     
         19 . A turn-fin tube comprising:
 a tube capable of channeling a flowing fluid; and   a fin wound in a helical shape on an outer surface of the tube,   wherein the fin includes a base section wound on an outer surface in contact with the tube, and an extension section extending from the base section at a predetermined angle in an outward direction from the tube.   
     
     
         20 . The turn-fin tube according to  claim 19 , wherein the tube has a helical groove formed in a helical shape in a lengthwise direction thereof, and the base section is fitted into the helical groove. 
     
     
         21 . The turn-fin tube according to  claim 19 , wherein the extension section includes a first extension section, which extends in the outward direction of the tube, and a second extension section, which is bent at the first extension section in a lengthwise direction of the tube, on a tube bending section where the tube is bent. 
     
     
         22 . The turn-fin tube according to  claim 20 , wherein the extension section located on a tube bending section where the tube is bent is installed in a state in which at least a part thereof is cut off. 
     
     
         23 . An apparatus for manufacturing a turn-fin tube, comprising:
 a tube supplying unit configured to supply a hollow tube;   a strip supply unit configured to supply a strip; and   a groove forming unit configured to form the strip into a fin wound on an outer surface of the tube in a helical shape,   where the fin includes a base section provided on a surface in contact with the tube, and an extension section extending from the base section in an outward direction of the tube at a predetermined angle.   
     
     
         24 . The apparatus according to  claim 23 , further comprising a groove forming unit, which is configured to press an outer surface of the tube to form a helical groove in a lengthwise direction of the tube such that the base section can be fitted into the helical groove. 
     
     
         25 . The apparatus according to  claim 23 , further comprising a pressing unit, which is configured to press the extension section located on a tube bending section where the tube is bent so as to have a first extension section, which extends from the base section in an outward direction of the tube at a predetermined angle, and a second bending section, which is bent at the first extension section in a lengthwise direction of the tube. 
     
     
         26 . The apparatus according to  claim 24 , wherein the groove forming unit includes:
 a pressing roller having a pressing blade configured to press the tube to form the helical groove in the lengthwise direction of the tube that is configured to be rotated and linearly transferred; and   a supporting roller assembly having supporting rollers, which are configured to be co-rotated in a rotational direction of the tube and support the tube on one diametrical side of the tube when the pressing blade presses the tube on the other diametrical side of the tube while being rotated.   
     
     
         27 . The apparatus according to  claim 26 , wherein the groove forming unit further includes a roller assembly moving unit, which is configured to move the supporting roller assembly in a vertical direction. 
     
     
         28 . The apparatus according to  claim 26 , wherein the groove forming unit further includes a tilting unit, which is configured to tilt the pressing blade to change a contact angle between the pressing blade and the outer surface of the tube. 
     
     
         29 . The apparatus according to  claim 23 , further comprising a cutting unit configured to cut at least a part of the extension section located on a tube bending section where the tube is bent. 
     
     
         30 . A method of manufacturing a turn-fin tube, comprising:
 supplying a hollow tube;   supplying a strip;   forming the strip into a fin, the fin having a base section installed on a surface in contact with the tube and an extension section extending from the base section in an outward direction of the tube at a predetermined angle; and   winding the fin in a helical shape on an outer surface of the tube to form the turn-fin tube.   
     
     
         31 . The method according to  claim 30 , further comprising pressing the outer surface of the tube to form a helical groove in a lengthwise direction of the tube such that the base section can be fitted into the helical groove. 
     
     
         32 . The method according to  claim 30 , further comprising pressing the extension section located on a tube bending section where the tube is bent so as to have a first extension section, which extends from the base section in an outward direction of the tube at a predetermined angle, and a second extension section, which is bent at the first extension section in a lengthwise direction of the tube. 
     
     
         33 . The method according to  claim 31 , wherein the forming of the helical groove includes:
 rotating and linearly transferring the tube;   bringing supporting rollers, which are rotated corresponding to a rotational direction of the tube, in contact with the tube on a diametrical upper outer surface of the tube; and   pressing a diametrical lower outer surface of the tube using a rotating pressing blade in order to press the tube to form a helical groove in a lengthwise direction of the tube.   
     
     
         34 . The method according to  claim 33 , wherein the forming of the helical groove further includes tilting the pressing blade to change a contact angle between the pressing blade and the outer surface of the tube. 
     
     
         35 . The method according to  claim 30 , further comprising cutting at least a part of the extension section located on a tube bending section where the tube is bent. 
     
     
         36 . A turn-fin type heat exchanger comprising a turn-fin tube according to  claim 19  and a bracket supporting the turn-fin tube. 
     
     
         37 . A turn-fin type heat exchanger comprising a turn-fin tube according to  claim 20  and a bracket supporting the turn-fin tube. 
     
     
         38 . A turn-fin type heat exchanger comprising a turn-fin tube according to  claim 21  and a bracket supporting the turn-fin tube. 
     
     
         39 . A turn-fin type heat exchanger comprising a turn-fin tube according to  claim 22  and a bracket supporting the turn-fin tube.