JPS5823111Y2 - Heat exchanger - Google Patents

Description

[Detailed description of the invention] Conventionally, as shown in FIGS. 1 and 2, a heat exchange tube 1 equipped with a large number of needle-shaped fins 2 extending radially is bent in a meandering manner, and the meandering bent portion is shaped like a cross-section. It was fixed by inserting the tongue piece 5 formed by inserting it into the opening 3a of the letter-shaped side plate 3 and cutting both edges 3b into the gap between the parallel heat exchange tubes 1, This is because the holding power of the heat exchange tubes 1 by the side plates 3 is weak, so vibrations are likely to occur, and it is difficult to maintain a constant gap between the heat exchange tubes 1, and air leaks from the gap between the heat exchange tubes 1 and the side plates 3. There was a problem with the leakage.

The present invention has been proposed to solve the above-mentioned problems, and one embodiment shown in FIGS. 3 and 4 will be described below.
The meandering bent portion of the heat exchange tube 1 is flattened by crushing the needle fins 2 at that portion, and then the bent portion is covered with foamed polyurethane sheets 3, 3.
It is rotated by being held between flat side plates 4 via '.

The side plates 4 are connected to each other with bolts, nuts, etc. using the attachment holes 5 and attached to the outer case.

Note that instead of the foamed polyurethane sheet, a sheet having flexibility, elasticity, water resistance, etc., such as styrene foam or polyurethane foam, may be used.

Since the present invention is constructed as described above, it has the following effects.

(1) By flattening the needle fins by crushing them at the meandering bent portion of the heat exchange tube, the side plate shape becomes a flat plate, which reduces materials and costs.

(2) Since the needle-like fins are flattened by crushing them at the meandering bent portion of the heat exchange tube, the contact area between the polyurethane sheet and side plate and the heat exchange tube is increased, and the holding force and vibration damping effect are significantly improved.

(3) Furthermore, since the needle-like fins are crushed to make them flat, the four-part area between adjacent heat exchange tubes is significantly reduced, and in combination with the improved adhesion with the heat exchange tubes due to the use of polyurethane, the wind blocking effect is improved.

[Brief explanation of the drawing]

1 and 2 show an example of a conventional heat exchanger, FIG. 1 is a plan view, FIG. 2 is a perspective view of the main parts, and FIG. 3 is a second embodiment of the present invention. 4 is a side view seen from the direction of arrow A in FIG. 3.

Claims (1)

[Scope of utility model registration request] The needle-like fins of the meandering bent part of the heat exchange tube, which has a large number of needle-like fins extending radially, are crushed to make the cross section flat, and this is made into a material with flexibility, elasticity, and water resistance such as foamed polyurethane, foamed polystyrene, and foamed polyethylene. A heat exchanger characterized in that the heat exchanger is sandwiched between flat side plates via a sheet having the following properties.