JPH0145021Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a solar heat collector, particularly a heat pipe type solar heat collector.

Recently, as this type of heat pipe type solar heat collector, one end of a plurality of parallel heat collecting pipes attached to a heat collecting plate in heat transfer contact state is used, and the inner pipe is used as a passage for a heat medium such as water. The heat pipe is connected to the peripheral wall of the outer tube of the header consisting of a heavy pipe, and the header outer tube and the heat collecting tube form a closed container containing a working fluid, with the former serving as a condensing section and the latter serving as an evaporating section. Proposals have been made to make it mandatory.

This idea is aimed at the above-mentioned type of heat pipe type solar collector, while ensuring as large an effective heat collection area as possible within the collector frame, which has a limited size. The purpose of the present invention is to safely protect a header section serving as a heat exchanger, prevent useless heat dissipation to the outside air, and facilitate maintenance and inspection of the header section.

Therefore, this invention, in the heat pipe type solar heat collector as described above, arranges the header outside the collector frame adjacent to and parallel to the upper horizontal frame member, and The outside of the header is covered with a header cover separate from the frame via a heat insulating material, and this header cover is detachably attached to the frame.

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

Figure 1 shows the entire solar heat collector A according to this invention, and Figures 2 and 3 show details of the structure of each part, where 1 shows the heat collecting part and 2 shows the heat exchange part. show. The heat collecting part 1 has a heat insulating material 4 laid at the bottom inside a heat collector frame 3 which is framed in a rectangular shape using extruded aluminum, etc.
A heat collecting plate 5 is disposed on the upper surface side over almost the entire surface, and a plurality of heat collecting pipes 6 are installed in parallel on the lower surface side of the heat collecting plate 5 in heat transfer contact with the heat collecting plate. ing. The lower end of each heat collecting pipe 6 is orthogonally connected to a common communication pipe 7, and the upper end thereof penetrates the upper horizontal frame member 3a of the frame body 3 and projects to the outside thereof. The header 10 is connected to the peripheral wall of the outer tube 12 of the header 10. Reference numeral 8 denotes a transparent body such as transparent glass disposed to cover the upper surface of the heat collecting section 1 .

The heat exchange section 2 is provided adjacent to the upper end of the heat collecting section 1, and includes a header 10 disposed close to and parallel to the upper horizontal frame member 3a of the frame 3;
It has a header cover 14 which covers the outside thereof with a heat insulating material 13 (see FIG. 2) interposed therebetween.

The header 10 is composed of a double tube, the inner tube 11 of which constitutes a heat medium passage through which a heat medium such as water circulates, and the outer tube 12 constitutes a condensing section of the heat pipe. That is, both ends of the inner tube 11 protrude from the outer tube 12 so that it can be connected to the heat medium circulation circuit, and both ends of the outer tube 12 are drawn and hermetically joined to the circumferential surface of the inner tube 11. , a heat collecting pipe 6 and a lower communication pipe 7 connected to the peripheral wall thereof.
A closed vacuum container is constructed, and a working fluid is sealed inside, thereby constructing an integrated heat pipe as a whole. Therefore, the heat collecting tube 6 in contact with the heat collecting plate 5 acts as an evaporating part of the heat pipe. Further, a large number of disc-shaped fins 15 are attached to the outer peripheral surface of the inner tube 11 in order to increase heat exchange efficiency. And outer tube 12
In order to prevent the working fluid from stagnation inside even if the slope of the roof where the heat collector A is installed changes, the lower part of the peripheral wall connected to the heat collector pipe 6 is formed into a guide wall 12a having a funnel-shaped cross section. The cross section as a whole has a substantially water droplet shape.

Thermal insulation material 13 surrounding the header 10
is made of glass wool, etc., and prevents heat dissipation to the outside from the outer tube 12, which becomes hot, and protects the header due to its vibration-proofing effect, making it difficult for defects such as loosening to occur in the joints of related parts. I take it as a thing.

By the way, the left and right frame members 3 in the heat collecting frame 3
b, 3b and the lower horizontal frame member 3c, as shown in FIGS. 3 and 4, are composed of a frame main body 31 made of extruded aluminum and a glass retainer 32 that is engaged and fixed thereto. However, the upper horizontal frame material 3a
As shown in Fig. 3 and Fig. 4, the part corresponding to the main body of the frame material is divided into two upper and lower parts to form the lower frame material 3.
1a and an upper frame member 31b, which are engaged and connected to each other by an engagement portion 16. The lower part of the upper frame 31b is a partition wall 34 that partitions the heat collection chamber 1a, which is the upper space inside the frame 3, and the header storage chamber 2a inside the header cover 14. The heat collecting pipe 6 passes through an inverted U-shaped notch 35 provided in the heat collecting tube 6 .

The header cover 14 is made of an extruded aluminum material or the like having a substantially U-shaped cross section, and has engaging protrusions 36, 36 on the upper and lower edges of the opening side, each having a substantially L-shaped cross section and an arrow-shaped engaging portion at the tip. are provided, and the engaging protrusions 36, 36 are locked to corresponding engaging protrusions 37, 37 protruding from the upper frame member 3a of the frame body 3, that is, its lower frame 31a and glass retainer 32a. It is detachably attached to the horizontal frame member 3a. In addition, this header cover 14 is formed at the same height as the heat collector frame 3, and both upper and lower surfaces are located on the same plane as the frame 3, and the openings at both ends are the frame 3 extending from the heat collecting part 1. side frame material 3b, 3
b is obstructed by the extension of b, so that in appearance,
The heat collection section 1 and the heat exchange section 2 are designed to appear as a continuous integral body.

In the solar heat collector A described above, the heat collecting tube 6 is heated via the heat collecting plate 5 by sunlight transmitted through the transparent body 8, and the working fluid sealed therein is caused to evaporate. This evaporated high-temperature steam rapidly moves from the heat collection tube 6 into the outer tube 12 of the header 10 above, exchanges heat with a heat medium such as water flowing in the inner tube 11, and heats the heat medium. The working fluid condensed in the outer tube 12 by this heat exchange flows down into the heat collecting tube 6 again solely by the action of gravity, and the working fluid in each heat collecting tube 6 is flown down into the heat collecting tube 6 by the communication pipe 7 connected to the lower end of the working fluid. By repeating the cycle of heating and evaporating the steam again while the liquid level is always maintained at an average level, solar thermal energy is continuously transferred to the heat medium in the header inner tube 11.

Therefore, solar heat collector A as described above can be used in either natural circulation type or forced circulation type solar water heaters by connecting both ends of its inner tube to the heat medium circulation circuit surrounding the heat storage tank. Applicable.

This idea is based on the above-mentioned idea, and since the header constituting the heat exchange section is located outside the heat exchanger frame and parallel to the upper horizontal frame material, the entire heat collector can be made into a flat plate. While being compact in shape,
A large heat collection area can be secured by arranging the heat collection plate almost entirely within the frame. In addition, since the header is located outside the frame, when assembling the heat collector, the heat insulating material and cover covering the header can be installed as an afterthought, and the cover can be removed if necessary. Since only the header portion can be exposed, maintenance and inspection work can be easily performed. Furthermore, since the header is covered with a heat insulating material, it prevents the high-temperature outer tube from coming into direct contact with the outside air or contacting the relatively low-temperature air in the heat collecting section, causing unnecessary heat dissipation. This can improve the efficiency of heat exchange to the heat medium flowing through the inner tube, and the vibration-proofing effect of the heat insulating material protects the header and prevents the joints with related components from loosening due to vibration. It is possible to effectively prevent harmful effects such as the occurrence of such problems.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view showing a solar heat collector according to this invention with a part cut away, Fig. 2 is a sectional view taken along the line - Fig. 1 with a part of the middle part omitted, and Fig. 3
The figure is a cross-sectional view taken along the line of FIG. 1 with the middle part omitted, and FIG. 4 is an exploded perspective view of the main parts. A... Solar water heater, 1... Heat collection section, 2... Heat exchange section, 3... Heat exchanger frame, 3a... Upper horizontal frame material, 5... Heat collection plate, 6... Heat collection pipe , 10...Header, 11...Header inner pipe, 12...Header outer pipe, 13...Header cover, 14...Header cover, 36, 37...Engaging protrusion piece.

Claims (1)

[Claims for Utility Model Registration] (1) A plurality of heat collecting tubes are installed in parallel in a state of heat transfer contact on a heat collecting plate arranged in a heat collector frame,
One end of these heat collecting tubes is connected to the circumferential wall of an outer tube of a double pipe header with an inner tube as a heat medium passage, and the header outer tube and the heat collecting tube are used to form a condensing section and an evaporating section. In the solar heat collector configured with a heat pipe, the header is located outside the collector frame and is arranged parallel to the upper horizontal frame member, and the outside of the header is covered with a heat insulating material. A heat pipe type solar heat collector, characterized in that a header cover is detachably attached to the frame body. (2) The heat pipe type solar heating system according to claim 1 of the utility model registration claim, characterized in that the height of the header cover is formed at the same height as the frame body, and the upper surfaces of both are substantially flush with each other. Heat collector.