JPS6226702Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a heat exchanger used for cooling transformers and the like.

As shown in FIGS. 1 to 3, in the conventional method, tube elements 1 are stacked and connected by a focusing tube 3 so that each tube element 1 is arranged in parallel, and between each tube element 1 and the focusing tube 3, The long side end surfaces of the openings of adjacent tube elements 1 are welded and joined as shown by M ₁ and M ₂ , respectively.

In particular, the end faces of the openings are joined by processing thin plates, and the welding line is long, so defects are likely to occur.

This invention was made in order to eliminate the above-mentioned drawbacks. The figures will be explained below. The tube element 1 shown in Fig. 4 has a cross section of each part shown in Figs.
It has the shape shown in FIG. That is, the tube element 1 is made up of two thin iron plates, and the middle part has a shallow corrugated surface as shown in FIG. 5, forming a medium flow path. As shown in FIG. 6, the end face has a rectangular opening 1a formed therein, and the height of the end face 1b is higher than the height of the corrugated surface in the middle part. FIG. 7 shows a longitudinal section. FIG. 8 shows a cross-sectional view of a case where a plurality of tube elements 1 having the same shape and size are stacked. The end faces 1c of adjacent elements are joined by inserting the clips 2, temporarily fixing them by spot welding at several points, and then galvanizing them to provide sealing properties. With this configuration, the conventional tube element 1 itself can be used as is, without adding any special structure to it, and the thin plate welding work on the long side of the opening, which was previously required, is eliminated, and the skill level for the work is reduced. It is unnecessary, easy to manufacture, convenient for mass production, and inexpensive.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a conventional heat exchanger, Fig. 2 is a sectional view taken along the - line in Fig. 1, Fig. 3 is a sectional view taken along the - line in Fig. 1, and Fig. 4 is a perspective view of the tube element. Figure 5 is a sectional view taken along line V-V in Figure 4,
Figure 6 is a sectional view taken along line 4 and Figure 7 is a cross-sectional view along line 4.
FIG. 8 is a sectional view showing an embodiment of the present invention, and FIG. 9 is a perspective view showing essential parts of the present invention. In the figure, 1 is an element tube, 2 is a clip, and 3 is a focusing tube. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A tube element consisting of a plurality of thin plates having a rectangular opening through which fluid can flow and having the same size and shape is connected in parallel with the long sides of the openings adjacent to each other, and is installed in the focusing tube. In the heat exchanger, each of the plurality of tube elements is fastened to each end face on the adjacent long side of the opening with a clip having a U-shaped cross section, and the tube element and the clip are integrally bonded to each other by a zinc plate. A heat exchanger characterized in that it is configured to be connected by pulling.