JPS6027308Y2 - solar heat collector plate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a solar heat collector, and particularly to a flat solar heat collector plate.

Solar heat collecting plates are made of a large number of heat collecting tubes that are fixed to each other at predetermined intervals to pass a heating medium (usually water), and they must be easy to form and lightweight. Aluminum or the like is usually used because it is inexpensive and easy to make a selective absorption film.

Aluminum may be used for the heat collecting pipe, but since aluminum may develop corrosion holes after long-term use depending on the quality of the water used, copper, which has good corrosion resistance, is usually used.

The present invention is a heat collecting plate placed between heat collecting tubes, and the distance between the heat collecting tubes is usually 100 to 30 TII! In n,
When fixing a heat collecting plate between these heat collecting tubes, the pitch of the heat collecting plate must have a mechanical accuracy of ±0.2vrm, and since the heat collecting plate itself is exposed to solar heat rays, the pitch must be adjusted to prevent expansion and Shrink and change.

If a heat collecting plate with a pitch different from the pitch of the heat collecting pipes installed is fixed, or if the pitch of the heat collecting plate changes due to thermal expansion and contraction, the heat collector (hereinafter referred to as a combination of heat collecting plate and heat collecting pipe)
The whole thing transforms.

The present invention solves these problems.

The present invention will be described below with reference to examples.

As shown in FIG. 1, heat collecting pipes 1, 1, . . . , arranged in parallel at equal intervals in advance are connected to header pipes 2, 2, and these are attached to an underframe (not shown).

Heat collecting plates 3 are attached between the heat collecting tubes in a caulked manner.

Furthermore, a water supply and drainage mouthpiece 4 is formed at the end of the header pipe 2.

FIGS. 2 and 3 are cross-sectional views showing examples of the heat collecting plate 3,
Near one side edge (right side) of the heat collecting plate 3, from the outer edge toward the inside, there are an interlocking part 5, a heat collecting pipe holding part 6 having a curved surface adapted to the upper surface of the heat collecting pipe 1, An upper holding part 8 is formed including a crimping protrusion 7 projecting downward from the hot plate 3.

It is convenient to carve a cut groove 7A in this crimping protrusion 7 in preparation for bending.

Near the other side edge (left side) of the heat collecting plate 3, from the inside toward the outer edge, there is an occlusal part 9 that intersects with the upper occlusal part 5, and a curved surface adapted to the lower surface of the heat collecting pipe 1. Heat collecting tube holding part 10
A lower holding portion 12 is formed by including a crimped ridge 11 extending substantially flatly with respect to the main surface of the heat collecting plate 3 .

Further, a bent portion 13 is formed in the middle portion of the heat collecting plate 3 so as to project upward from the heat collecting plate 3.

This bending part is provided along the longitudinal axis of the heat collecting tube 1, and the wall thickness of this part is thinner than that of other parts of the heat collecting plate 3 (for example, the thickness of the other part of the heat collecting plate is 0.7w). The thickness of the curved portion 13 is preferably 0.5 mm or less, where / is the thickness).

It is convenient if the cross section of the bending portion 13 is formed into an arcuate shape that is approximately equal to the cross section of the heat collecting tube clamping portion 6, since the appearance can be unified.

However, it does not necessarily have to be in the same arc shape as the holding part 6, and may be formed in a triangular, rectangular, or trapezoidal shape for a novel design.

Alternatively, the heat collecting plate 3 can be made concave without protruding upward.

The above-mentioned bending portion 13 deforms freely when fixed between the heat collecting tubes 1 by a method described later, and does not exert stress on the heat collecting tubes 1 arranged in parallel even if there is a pitch dimensional error or thermal expansion.

The heat collecting pipe 1 is held between the heat collecting pipe holding parts 6 and 10 of the heat collecting plate 3 adjacent to the left and right sides of the two heat collecting pipes formed in this way,
Both mating parts 5 and 9 are meshed with each other in a complementary manner, and the protrusion 7 for crimping is formed.
is bent, and the crimped ridge 11 of the adjacent heat collecting plate 3 is elastically crimped between the crimped ridge and the heat collecting plate 3.

On the right side of FIG. 3, the state in which the crimping protrusion 7 is deformed by crimping and clamps the adjacent crimped protrusion 11 is shown by broken lines.

The assembly order is as follows: after placing the holding part 8 on the heat collecting tube 1, engaging the engaging part 9 of the next heat collecting plate 3, and surrounding the heat collecting pipe 1 with the holding part 10 and the holding part 8. Caulk the crimp protrusion 7.

Repeat the following in sequence. When extruding the heat collecting plate 3, the fourth
As shown in the figure, it is advantageous to extrude the heat collecting plate 3 through a die having holes bent into a chevron shape, since the container diameter of the extruder can be reduced.

Since the bending portion 13 is thinner than other parts of the heat collecting plate 3, it can be easily developed into the cross-sectional shape shown in FIG. 2 by pressing after extrusion with such a cross-sectional shape.

Since the present invention is constructed as described above, even if there is a slight error in the pitch dimension of the heat collecting plate during extrusion molding, or thermal expansion and
Deformation of the heat collecting plate due to contraction can also be adjusted or absorbed by the freely deformable bending portion.

Further, according to an embodiment of the present invention, the container diameter of the extruder can be reduced by utilizing the thinness of the bending part, and the bending part can be formed into an upwardly protruding arcuate cross section. For example, even if the above-mentioned adjustment or deformation is performed, it is advantageous because it is visually noticeable.

[Brief explanation of the drawing]

Fig. 1 is a schematic plan view of a solar heat collector, Fig. 2 is a sectional view of the solar heat collection plate of the present invention, Fig. 3 is an enlarged view of the main part of Fig. 2,
FIG. 4 is a cross-sectional view showing the mode of extruding the heat collecting plate. 1... Heat collection pipe, 3... Heat collection plate, 8, 1
2...Holding part, 13...Inflection part.

Claims (1)

[Claims for Utility Model Registration] 1. On both side edges, holding parts 8, 12 are formed to hold the heat collecting tube 1 in cooperation with the side edges of the adjacent heat collecting plate 3, and in the middle part, A solar heat collecting plate characterized in that a freely deformable bending portion 13 is formed along the longitudinal axis of the heat collecting tube 1. 2. The solar heat collecting plate according to claim 1, wherein the bent portion 13 is formed thinner than the remaining portion of the heat collecting plate. 3. The solar heat collecting plate according to claim 1 or 2, wherein the cross-sectional shape of the bending portion 13 is arcuate. 4. The solar heat collecting plate according to any one of claims 1 to 3, wherein the bent portion 13 protrudes from the outer surface of the heat collecting plate.