JPH01117480U

JPH01117480U -

Info

Publication number: JPH01117480U
Application number: JP1060788U
Authority: JP
Priority date: 1988-01-29
Filing date: 1988-01-29
Publication date: 1989-08-08

Description

[Brief explanation of the drawing]

第１図は請求項２の二重管型熱交換器用ロンナ
ーフインの一実施例を示す断面図である。第２図
は第１図の斜視図である。第３図は請求項３の二
重管型熱交換器用インナーフインの一実施例を示
す断面図である。第４図は従来の二重管型熱交換
器を示す縦断面図である。第５図は従来の二重管
型熱交換器用インナーフインを示す斜視図である
。〔主要な部分の符号の説明〕、１３……外筒、
１５……内筒、３１……帯状部、３５……外筒側
突出部、３７……内筒側突出部。 FIG. 1 is a sectional view showing an embodiment of the roner fin for a double-tube heat exchanger according to claim 2. FIG. 2 is a perspective view of FIG. 1. FIG. 3 is a sectional view showing an embodiment of the inner fin for a double-tube heat exchanger according to claim 3. FIG. 4 is a longitudinal sectional view showing a conventional double-tube heat exchanger. FIG. 5 is a perspective view showing a conventional inner fin for a double-tube heat exchanger. [Explanation of symbols of main parts], 13...outer cylinder,
15... Inner cylinder, 31... Band-shaped part, 35... Outer cylinder side protrusion, 37... Inner cylinder side protrusion.

Claims

[Claims for Utility Model Registration] (1) A large number of wavy band parts housed in the space formed between the outer cylinder and the inner cylinder are half pitched with respect to the adjacent band parts. In the inner fin for a double-tube heat exchanger that is connected to each other in a staggered manner, the number of outer cylinder side protrusions that protrude toward the outer cylinder out of the plurality of band-shaped parts is in contact with the outer cylinder. An inner fin for a double-pipe heat exchanger, characterized in that the number of inner cylinder side protrusions protruding toward the inner cylinder side is larger than the number of the inner cylinder side protrusions that come into contact with the inner cylinder. (2) The outer cylinder-side protrusion and the inner cylinder-side protrusion formed on one side of the adjacent band-shaped parts are in contact with the outer cylinder and the inner cylinder, respectively, and the outer cylinder-side protrusion formed on the other band-shaped part is in contact with the outer cylinder and the inner cylinder, respectively. 2. The inner fin for a double-tube heat exchanger according to claim 1, wherein only the outer cylinder side protrusion contacts the outer cylinder. (3) The double pipe type according to claim 1, wherein among the outer cylinder side protrusions and the inner cylinder side protrusions formed on the band-shaped part, every other inner cylinder side protrusion comes into contact with the inner cylinder. Inner fin for heat exchanger.