JPS6021709Y2 - solar heat collector - Google Patents

Description

[Detailed description of the invention] This invention relates to a solar heat collector in which a heat collector for collecting solar heat is housed in a transparent vacuum glass tube, and this heat collector is supported on the glass tube via a support. .

As a solar heat collector, a heat collector made by integrally bonding a heat collector tube through which water passes and a heat collector plate is housed in a vacuum glass tube, and a vacuum layer is formed around the heat collector to generate energy by convection and conduction. 2. Description of the Related Art Vacuum glass tube type solar heat collectors are known, which are designed to prevent heat loss and obtain high heat collection efficiency.

The basic structure of such a vacuum glass tube type solar heat collector is as shown in Fig. 1 at b.

In the figure, 1 is a long translucent glass outer tube with a length of, for example, 2 to 3 m, 2 is a heat collecting tube housed inside the glass outer tube, and 3 is a heat collecting tube that is integrally connected to the heat collecting tube 2 in a conductive manner. A plate 4 is an end plate that closes the open end surface of the glass outer tube 1, and the inside of the glass outer tube is evacuated.

The heat collecting tube 2 has a double pipe structure made of copper, for example, and has an outgoing and returning path for water inside the tube, and is connected to a water supply line (not shown) through a header on the outside of the glass outer tube 1 passing through the end plate 4. connected.

By the way, when assembling and configuring the vacuum glass tube type solar heat collector, it is important that the heat collecting tube 2 is held at a coaxial predetermined position within the glass outer tube 1 over its entire length from the viewpoint of heat collection efficiency. is necessary.

Furthermore, what must be taken into consideration in this case are the heat conductivity between the heat collecting tube 2 and the glass outer tube 1 and the ease of assembly.

In other words, even if a vacuum layer is formed around the heat collection plate within the glass outer tube, heat loss will be large if a heat transfer path is formed between the heat collection tube and the glass outer tube to support the heat collection tube. It becomes.

On the other hand, if the middle part of the heat collecting tube is not supported at all within the entire inner part of the glass outer tube 1, it is not only extremely difficult to support the long and heavy heat collecting tube in a cantilevered manner, but also if the outer glass tube Even if supported outside the tube, a heat collecting tube made of a thin copper tube is long and bends significantly, making it impossible to maintain a predetermined position within the glass tube.

For this purpose, as an example, as shown in FIG. 2, supports 5 having radial support legs made of a material with low heat conductivity, such as a thin plate of stainless steel, are fitted at multiple locations in the middle of the heat collecting tube 2.
It has already been proposed that the tip of the leg of this support is in contact with the inner surface of the glass outer tube 1 to support the heat collector, which is an assembly of the heat collector tube 2 and the heat collector plate 3, at a predetermined position inside the glass outer tube. has been done.

Therefore, in order to fit the illustrated support body 5 to the heat collecting pipe 2, a notch 6 with a required spacing is formed in the heat collecting plate 3 along the longitudinal direction.
need to be formed.

With this support structure, the glass outer tube 1 can be stably mounted over the entire length of the heat collector while suppressing heat loss due to thermal conduction.
On the other hand, as a result of the notch 6 described above, the heat collecting area of the heat collecting plate 3 within the glass outer tube 1 is reduced, and the heat collecting area of the heat collecting plate 3 per glass outer tube is reduced. This results in the disadvantage that the heat collection ability is reduced.

In addition, the assembly work of the heat collecting tube 2 including the support body 5 and the heat collecting plate 3 is troublesome.

The present invention was developed in consideration of the above points, and its purpose is to eliminate the drawbacks of the conventional structure described above, and to stably support the heat collector on the glass outer tube without reducing the heat collection area. It is an object of the present invention to provide a solar collector with a simple structure and a high heat collecting capacity.

This purpose is achieved by the present invention, which includes a support body having a gem clip part formed by bending and forming an elastic wire and a large diameter circular arc part connected to the gem clip part, and the gem clip part of the support body is inserted into the side edge of the heat collecting plate. The large-diameter circular arc portion of the support body is elastically pressed against the inner circumferential surface of the glass outer tube to support the assembly of the heat collecting tube and the heat collecting plate at a predetermined position within the glass outer tube, Furthermore, the heat collecting plate is provided with a cut groove for locking the gem clip portion of the support body on the side edge thereof, and the large diameter circular arc portion continuous to the gem clip portion is arranged at the approximate center of the gem clip portion in the axial direction of the heat collecting tube. This is achieved by forming the

Embodiments of the present invention will be described in detail below with reference to the drawings.

First, in FIGS. 3a, b, and c, the assembly in which the heat collecting plate 3 is joined to the heat collecting tube 2 is inserted into the transparent glass outer tube 1 via the support 7 according to the present invention attached to the heat collecting plate 3. is supported by

This support is made by bending and forming an elastic wire with relatively low conductivity and high spring characteristics, such as a stainless steel wire.

In addition, the shape includes a gem clip part 71 having a triangular planar shape, and a large-diameter circular arc part 72 that extends in the vertical direction and is connected to both ends of the wire disposed approximately at the center of the gem clip part 71 in the axial direction of the heat collecting tube. ing.

In particular, the radius of curvature of the large diameter circular arc portion 72 is selected to be slightly larger than that of the glass outer tube 1.

A plurality of such supports 7 are prepared and individually distributed along the longitudinal direction of the heat collecting plate 3 on both left and right side edges thereof and attached as follows.

That is, as shown in FIG. 3C, the gem clip portion 71 of the support
is inserted into the side edge of the heat collecting plate 3 from the outside in the direction of the arrow and clamped and fixed.

In order to maintain the mounting position of the support body 7 on the heat collection plate 3, a slight cut groove 31 for locking the support body 7 is formed in advance at the support attachment location of the heat collection plate 3. has been done.

Further, by bringing one side of the gem clip portion 71 into contact with the central convex curved portion of the heat collecting plate 3 at the mounting position, the mounting posture of the support body 7 is further stabilized.

In this way, in the process of inserting the heat collector with the support 7 attached to the heat collection plate 3 into the glass outer tube 1, the large-diameter circular arc portion 72 of the support 7 is slightly compressed in the inner radial direction while being inserted into the glass outer tube. As a result, the arcuate portion 72 is elastically pressed against the inner circumferential surface of the glass outer tube 1, and its spring action can stably support the heat collector at a predetermined position within the glass outer tube over its entire length. can.

Moreover, unlike the conventional structure described in FIG. 2, the support body 7 is attached to the heat collecting plate 3 from the side by sandwiching it, so it is possible to avoid a large reduction in the heat collecting area, which is much better than the conventional structure. Heat collection ability can be increased.

In addition, the support 7 can be made very cheaply and is easy to assemble.

Further, FIG. 4 shows another embodiment in which the formation of the gem clip portion is slightly different from the embodiment shown in FIG. 3 described above.

That is, in this embodiment, the gem clip portion 71 has a U-shape, and a large-diameter arcuate portion 72 is formed at approximately the center of the U-shape in the axial direction of the heat collecting tube, and the side of the heat collecting plate 3 is formed in accordance with this shape. Cut grooves 31 for locking are formed at two locations on one support 7 on the edge.

Similar to the embodiment shown in FIG. 3, this embodiment is also attached to the left and right edges of the heat collecting plate 3, and the large diameter circular arc portion 72 is pressed against the inner circumferential surface of the glass outer tube 1 to form a heat collecting body. To support.

In FIG. 4, since two locking grooves 31 are provided, one side of the gem clip portion 71 does not have to come into contact with the edge of the central convex curve of the heat collecting plate 3 as shown in FIG. Also, the mounting posture of the support body 7 can be further stabilized.

Furthermore, in order to stabilize the mounting position, the support body is less deformed during the process of inserting the heat collector into the glass outer tube than in FIG. 3, and assembly is easier.

As described above, according to the present invention, the heat collector can be stably supported at a predetermined position within the transparent glass outer tube without impairing the heat collecting ability of the heat collecting plate.

Furthermore, since the structure of the support is simple and assembly is easy, it also has the advantage of being able to reduce costs, making it possible to provide a solar heat collector of great practical value.

Furthermore, by forming the large-diameter arcuate portion 72 approximately at the center of the gem clip portion 71 in the axial direction of the heat collecting tube, the following noteworthy advantages are brought about in terms of assembly.

In the process of inserting the heat collector with the support body 7 attached to the heat collecting plate 3 in advance into the glass outer tube 1, the large diameter arc part 72 is slightly compressed in the inner radial direction and inserted, so that the large diameter arc part 72 and the glass Depending on the degree of contact with the outer tube 1, various forces are applied from the glass outer tube to the clip portion 71 and the heat collecting plate via the large-diameter arc portion 72.

This force appears as a force that lifts the heat collecting plate up and down, especially near the locking notch.

When such a force is generated, unlike the support structure of the present invention, the locking notch is located at one location and the clamping part of the clip is a support that does not exist symmetrically around the notch, which is the point of force application. If the body structure is such that, for example, a large-diameter circular arc portion is provided at one end of the U-shaped clip in FIG. It has been confirmed through trials by the present inventors that there is a problem that the support body 7 may be deformed.

According to the present invention, the force acts on the object and is distributed over a relatively wide range of the heat collecting plate, so that such problems do not occur and there is no assembly failure.

[Brief explanation of the drawing]

Figures 1a and 1b are a partially cutaway side view and longitudinal cross-sectional front view showing the basic structure of a solar heat collector, Figure 2 is a perspective view of the conventional structure, and Figures 3a, b, and c are the views of the present invention. A side sectional view, a vertical front view, and an exploded perspective view showing the detailed structure of the main parts of the embodiment, and FIG. 4 is an exploded perspective view of the main parts of another embodiment. 1... Glass outer tube, 2... Heat collecting tube, 3
・Curved heat collecting plate, 31... Cut groove, 7...
・Support body, 71 ・Song ・Gem clip part, 72...
・Large diameter arc part.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A heat collecting tube coaxially housed within a translucent glass outer tube, in which a heat collecting plate is joined to the heat collecting tube, and a gem clip portion formed by bending and forming an elastic wire; A support body having a large-diameter circular arc portion connected to a gem clip portion is provided, and the gem clip portion of the support body is inserted and attached to a side edge of a heat collecting plate,
In the solar heat collector in which the assembly of the heat collecting tube and the heat collecting plate is supported at a predetermined position within the glass outer tube by elastically pressing the large diameter circular arc portion of the support body against the inner circumferential surface of the glass outer tube, The heat collecting plate is
The side edge thereof is provided with a cut groove for locking the gem clip portion of the support body, and the large diameter arcuate portion connected to the gem clip portion is formed approximately in the center of the gem clip portion in the axial direction of the heat collecting tube. solar heat collector. 2 Utility Model Registration Claims The solar heat collector according to claim 1 is characterized in that a plurality of supports are attached to the left and right edges of the heat collector plate in a distributed manner along the longitudinal direction of the heat collector plate. solar heat collector.