JP2013257078A5

JP2013257078A5 -

Info

Publication number: JP2013257078A5
Application number: JP2012133588A
Authority: JP
Filing date: 2012-06-13
Publication date: 2014-07-24
Anticipated expiration: 2032-06-13

Description

本発明に係る捩り管形熱交換器は、外周面に複数条の螺旋山と螺旋溝を持つ内管と、内管の螺旋溝に沿うように巻きつけた複数条の外管とを備え、内管は、螺旋山の高さが螺旋溝に巻きつけた外管よりも高く、かつこの螺旋山の内部に流路となる空洞が残るように隣接する一方の外管を包み込むようにカシメられて接合されているものである。 A twisted tube heat exchanger according to the present invention includes an inner tube having a plurality of spiral peaks and a spiral groove on an outer peripheral surface, and a plurality of outer tubes wound around the spiral groove of the inner tube, The inner pipe is higher than the outer pipe wound around the spiral groove, and the inner pipe is caulked so as to wrap one adjacent outer pipe so that a cavity serving as a flow path remains inside the helical mountain. Are joined together.

本発明の捩り管形熱交換器においては、外周面に複数条の螺旋山と螺旋溝を持つ内管と、内管の螺旋溝に沿うように巻きつけた複数条の外管とを備え、内管は、螺旋山の高さが螺旋溝に巻きつけた外管よりも高く、かつこの螺旋山の内部に流路となる空洞が残るように隣接する一方の外管を包み込むようにカシメられて接合されているので、金属ロウによる接合材を使用することなく、内管と外管を密着接合でき、安価に製造することができる。また、内管のカシメた部分も流路となるので、内部を流れる流体の乱流効果を期待することができ、伝熱性能を向上させることができる。 The twisted tube heat exchanger of the present invention comprises an inner tube having a plurality of spiral ridges and spiral grooves on the outer peripheral surface, and a plurality of outer tubes wound along the spiral groove of the inner tube, The inner pipe is higher than the outer pipe wound around the spiral groove, and the inner pipe is caulked so as to wrap one adjacent outer pipe so that a cavity serving as a flow path remains inside the helical mountain. Therefore, the inner tube and the outer tube can be tightly bonded without using a metal brazing bonding material, and can be manufactured at low cost. Further, since the crimped portion of the inner pipe also becomes a flow path, a turbulent flow effect of the fluid flowing inside can be expected, and heat transfer performance can be improved.

Claims

An inner pipe having a plurality of spiral mountains and spiral grooves on the outer peripheral surface;
A plurality of outer tubes wound around the spiral groove of the inner tube,
The inner pipe wraps one adjacent outer pipe so that the height of the spiral ridge is higher than the outer pipe wound around the spiral groove and a cavity serving as a flow path remains inside the spiral ridge. A torsion tube type heat exchanger characterized by being crimped and joined.

2. The torsion tube heat exchanger according to claim 1, wherein the inner pipe is formed such that the height H of the spiral crest before crimping is approximately twice the outer diameter Ro of the outer pipe. .

The inner pipe is formed such that the spiral pitch P before crimping is larger than the outer diameter Ro of the outer pipe and smaller than twice the outer diameter Ro of the outer pipe. 2. A twisted tube heat exchanger according to 2.

The outer tube is deformed into a flat cross section when crimped, and the minor axis side outer diameter Ra of the flat cross section is formed to be ½ or less of the height H of the spiral crest of the inner tube before caulking. The twisted tube heat exchanger according to any one of claims 1 to 3, wherein the torsion tube heat exchanger is provided.