JPS589735Y2 - solar heat collector - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved structure of a solar heat collector having a double-tube structure, which has a translucent outer tube made of glass or the like around the outer periphery of a heat collecting pipe serving as a heat medium passage.

It is well known that the purpose of providing an airtight outer tube around the outer periphery of the heat collecting pipe is not only for the purpose of heat insulation but also to prevent condensation from forming on the inner surface of the outer tube and the infiltration of rainwater.

However, since the heat collecting pipe is generally filled with a heat medium such as water, it becomes heavy and the central part thereof is curved and comes into contact with the outer pipe.

Particularly, the longer the heat collecting pipe becomes, the more this tendency is likely to occur, leading to disadvantages such as damage to the outer tube and a decrease in heat receiving efficiency from the reflector plate located outside the outer tube.

Therefore, as shown in FIGS. 1 and 2, the legs 1 of the C-shaped support 9
A structure in which 0 was welded to the heat collecting pipe 11 was proposed.

However, when this pipe was undulated in the vertical direction due to expansion and contraction of the heat collecting pipe 11, stress was concentrated on the welded part 12 to the heat collecting pipe 11, and the welded part peeled off, so that it did not function as a supporting member.

The present invention was devised in view of this point, and will be explained below with reference to Figs. It is welded.

3 is a heat collecting pipe made of copper or the like arranged coaxially within the outer tube 1, with both ends passing through the stem 2 and led out from the outer tube 1, and one end being welded to the stem 2 via the support tube 4; The other end is welded to the stem 2 via an expandable bellows 5.

Reference numeral 6 is a copper heat collecting fin attached to the heat collecting pipe 3 for heat transfer to enhance the heat receiving effect.

7 is a pair of C-shaped contact rods 71.71 that are arranged in parallel at intervals and that contact the inner surface of the outer tube 1, and a connecting rod 72.72 that connects both C-shaped end portions of the contact rods 71.71. It is a supporting member integrally constructed of a wire with a dogleg-shaped support leg 73 that connects the C-shaped center part, and the bent part of the dogleg-shaped support leg 73 is connected to a heat collecting member such as a heat collecting fin 6 or a pipe 3. Weld to 8.

The C-shaped contact rods 71, 71 are made larger than the inner diameter of the outer tube 1 and configured to have a repelling force toward the outside, and are reduced in diameter when inserted into the outer tube 1. It is in close contact with the inner circumferential surface of the pipe, and together with its spring properties, it supports the heat collecting pipe 3 in a suspended state and prevents the pipe 3 from sagging.

Therefore, even if the heat collection pipe 3 is undulated in the vertical direction due to thermal expansion and contraction or the weight of the heating medium, the dogleg-shaped support leg 73 will elastically displace and follow the wave as shown in Figure 5.6. The C-shaped contact rods 71, 71 are elastically deformed and absorb the deformation of the heat collecting pipe 3.

In short, the inclined portion of the dogleg-shaped support leg 73 elastically absorbs the deformation of the heat collecting pipe, thereby alleviating stress concentration on the welded portion 8 and preventing peeling.

[Brief explanation of drawings]

1 and 2 illustrate a conventional example, where FIG. 1 is a perspective view, FIG. 2 is a sectional view, and FIGS. 3 to 6 are those of the present invention, and FIG. 3 is a sectional view. Figure 4 is a perspective view of the support member, Figure 5 is a perspective view of the support member;
The figure is a perspective view of the main part, and FIG. 6 is a side view of the main part. 71... C-shaped contact rod, 72... Connection rod, 73... Support leg, 7... Support member,
1...Outer tube.

Claims (1)

[Scope of utility model registration request] A support member is formed by integrally constructing a pair of C-shaped contact rods arranged in parallel at intervals and in contact with the inner surface of the outer tube, a connecting rod connecting the contact rods, and a dogleg-shaped support leg from a wire rod. . A solar heat collector, wherein the supporting member is installed in an outer tube, and the supporting legs are attached to the heat collecting member.