JPH0127012Y2 - - Google Patents

Description

[Detailed explanation of the invention] (a) Industrial application field This invention consists of a heat collecting section, a hot water tank covered with a synthetic resin outer cover, and a heat collecting unit that is attached to the outer cover of the hot water tank to collect sunlight. The present invention relates to an improvement in a solar water heater equipped with a reflector that reflects light toward the surface of the solar water heater.

(B) Prior Art As shown in FIGS. 1 to 3, a conventional solar water heater 1 of this type includes a heat collecting section 3 whose upper surface is covered with a transparent plate 2, a water container 4 made of synthetic resin, and an exterior. Hot water storage tank 7 filled with foam insulation material 6 between cover 5
A reflecting plate 8 for reflecting sunlight toward the heat collecting part 3 is attached to the front part 5a of the exterior cover 5 on the heat collecting part 3 side. Here, a reflection plate attachment part 5b that projects upward is formed on the upper edge of the exterior cover 5 on the side of the heat collecting part 3, a lower edge 8a is provided on the lower end of the reflection plate 8, and a reflection plate is provided on the upper end. 8 is bent in the horizontal direction and further bent downward to provide an upper edge 8b. The lower edge 8a of the reflector 8 is fixed to the frame plate 10 of the heat collecting section 3 with screws 9..., and the upper edge 8b is fixed to the reflector mounting part 5b of the exterior cover 5 with rivets 11... .

By the way, while the reflective plate 8 is made of a metal plate such as stainless steel, the exterior cover 5 is made of a synthetic resin material such as polypropylene, and the coefficients of thermal expansion of the two materials are significantly different. Therefore, the upper edge 8 of the reflecting plate 8
A horizontally elongated hole 12 is provided in b, and by inserting the rivet 11 through this elongated hole 12, the elongated hole 12 absorbs the dimensional displacement in the direction of arrow A due to the difference in thermal expansion. . However, this elongated hole 12 has no relief against dimensional displacement in the direction of arrow B, which is perpendicular to arrow A, and has the drawback of causing deformation such as deflection of the reflecting plate 8.

(C) Purpose of the invention This invention is for attaching a reflector to the synthetic resin outer cover of a hot water tank, and it reliably absorbs dimensional displacement due to the difference in thermal expansion between the reflector and the outer cover. The purpose is to prevent deformation of the reflector.

(d) Structure of the invention In order to achieve the above object, the solar water heater of this invention has a reflector mounting part that projects upward from the upper edge of the outer cover on the heat collecting part side. Two protrusions protruding toward the hot water storage tank are provided on the inner surface, and a through hole larger than the diameter of the screw that is inserted between these protrusions is bored, and the reflector is bent at the upper end of the reflector to attach the part to which it is attached. A long hole is formed in this mounting part in the direction in which the reflector is locked, a plate nut with a screw hole is held between the protrusions of the exterior cover, and a screw is inserted through the long hole and the through hole into the plate nut. The dimensional displacement caused by the difference in thermal expansion between the reflector and the exterior cover is compensated for by using the mutual sliding action between the two protruding pieces and the plate nut. It is absorbed through the hole and also through the elongated hole in the direction perpendicular to the protruding piece.

(e) Working Example Below, one working example of this invention is shown in Figures 4 to 7.
This will be explained with reference to the figures. In addition, Figures 4 to 7
In the figures, parts that are the same as those in FIGS. 1 to 3 are designated by the same reference numerals.

In this embodiment, a vertically elongated hole 13 is provided in the upper edge 8b (mounted part) of the reflector 8 fixed to the exterior cover 5 of the hot water storage tank 7 in the direction in which the reflector 8 is locked.
The reflector mounting portion 5b of the exterior cover 5 is provided with two protruding pieces (protrusions) 14 and 15 that protrude toward the hot water tank 7 in a direction perpendicular to the elongated hole 13. Further, a through hole 16 larger than the diameter of a screw described later is bored between the protruding pieces 14 and 15 in the reflection plate mounting portion 5b. Moreover, the two protruding pieces 14 and 15 of this exterior cover 5
is a rectangular plate nut 18 with a screw hole 17
It's holding the edges. Then, insert screw 19 into slotted hole 13.
and the screw hole 1 of the plate nut 18 through the through hole 16.
It is screwed onto 7. Note that the through hole 16 is formed by the protruding piece 1.
It may be an elongated hole that is long in the same direction as 4 and 15.

In the above configuration, the exterior cover 5 is the reflector 8
On the other hand, when the exterior cover 5 is displaced in the direction of the arrow X due to the difference in thermal expansion, the protrusions 14 and 15 slide along the plate nuts 18 at the reflector mounting portion 5b of the exterior cover 5, and the displacement of the exterior cover 5 is caused by the displacement of the exterior cover 5 toward the through hole 16. It is absorbed by. Further, when the exterior cover 5 is displaced in the direction of arrow Y with respect to the reflection plate 8, this displacement is absorbed by the elongated hole 13 on the upper edge 8b of the reflection plate 8.

In this way, according to this embodiment, the dimensional displacement caused by the difference in thermal expansion between the metal reflection plate 8 and the synthetic resin exterior cover 5 can be reliably absorbed in any direction. , the reflection plate 8 can be prevented from being deformed such as bending. In addition, since the two sides of the plate nut 18 are held between the protruding pieces 14 and 15, the plate nut 18 can be prevented from rotating when the screws are tightened, and the reflecting plate 8
Installation can be done easily and firmly.

(f) Effects of the idea This idea is structured as described above, so
It can reliably absorb the dimensional displacement caused by the difference in thermal expansion between the reflector and the exterior cover, which are made of different materials, and prevent the reflector from deforming such as bending.Moreover, the reflector can be easily installed. It is something that can be done strongly.

[Brief explanation of the drawing]

Figures 1 to 3 show a conventional example, where Figure 1 is a partially cutaway perspective view showing the overall schematic structure, Figure 2 is an exploded perspective view of the main part, and Figure 3 is similar to Figure 2. An enlarged perspective view of part A, and Figs. 4 to 7 show an embodiment of this invention. Fig. 4 is an exploded perspective view of the main part, and Fig. 5 is an enlarged perspective view of part B in Fig. 4. , 6th
The figure is an enlarged plan view of section C in FIG. 4, and FIG. 7 is a sectional view of the main part. 1...Solar water heater, 3...Heat collecting section, 5...Exterior cover, 5b...Reflector mounting section, 7...Hot water tank, 8...Reflector, 8b...Top edge (mounted part) ,
13...Elongated hole, 14,15...Protruding piece, 16...
Through hole, 17...screw hole, 18...plate nut, 19
……Screw.

Claims (1)

[Scope of utility model registration request] It is equipped with a heat collecting section, a hot water storage tank, an exterior cover made of synthetic resin for the hot water storage tank, and a reflector that is attached to the heat collecting section side of the exterior cover with screws and reflects sunlight to the heat collecting section. In the solar water heater, a reflector mounting part is formed by protruding from the upper edge of the exterior cover on the heat collecting part side, and two protrusions protruding toward the hot water tank are provided on the inner surface of the reflector mounting part, and A through hole larger than the diameter of the screw inserted between these protrusions is bored, and the reflector is bent at the upper end of the reflector to form an attached part. A solar water heater characterized in that an elongated hole is bored, a plate nut having a screw hole is held between protrusions of an exterior cover, and a screw is screwed into the screw hole of the plate nut through the elongated hole and the through hole.