JPS6015069Y2 - solar heat collector tube - Google Patents

Description

[Detailed description of the invention] The vacuum glass tube type collector installed in the solar heat collector is installed in the heating medium introduction path and exhaust path according to predetermined specifications. Solar heat collectors using bottomed double-tube air collectors have a complicated connection between the heating medium introduction and discharge channels, and due to structural problems, it is necessary to easily install a part of the heat collector's header on site. cannot be assembled.

Furthermore, it is not easy to replace the heat collecting tubes, and in the event of damage, the entire function of the heat collecting device must be stopped.

In view of the actual situation, the present invention relates to a solar heat collection tube in which the flow path of the heating medium can be easily constructed.The present invention will be described below based on examples.

Fig. 1 is a partially omitted plan view showing one unit of the solar heat collecting device equipped with the heat collecting pipe of the present invention, in which the heating medium is provided with an inlet passage for the medium to be heated and an outlet passage for the heating medium. A passageway 1 is placed in the center, and solar heat collection tubes 2 of the present invention are arranged in parallel rows on both sides of the passageway, 12 on each side.

Thus, as shown in FIG. 2, the solar heat collecting tube 2 of the present invention has so-called bottomed transparent glass tubes 3 and 4 of different diameters, one end of which is closed and the other end of which is open. The inner and outer tubes 3 and 4 are double stacked concentrically with a gap between them, and the mutual space between the inner and outer tubes 3 and 4 is sealed and depressurized to form a vacuum double main tube 5. A selectively absorbing thin film 6 having a high absorption rate for short light waves and a low emissivity for heat rays is deposited, and a heating medium introduction hole is provided at the open end of the vacuum double main pipe 5. A seal ring 10 includes a lid 9 formed in a protruding state with a required distance between the lid 9 and the discharge hole 8.
Or it is covered with 11 interposed.

In addition, in the embodiment, both holes 7 and 8 are drilled on a line passing through the center of the lid 9 with a maximum interval between them.
The holes 7 and 8 are placed on a line passing through the center of the lid 9, depending on whether the inner and outer tubes 3 and 4 are stacked concentrically as described above, or eccentrically stacked based on the installation specifications of the solar heat collecting tube. It is formed along a line that does not pass through the center, and its position is not specified.

Next, some aspects of the lid 9 will be explained.

Materials for the lid 9 include non-rusting metal plates such as stainless steel plates and copper plates, as well as heat-resistant plastics, heat-resistant glass, china, ceramics, etc., but the lids 9A to 9C shown in FIGS. 3 to 7 are all made of metal formed by press working, and the lid 9A shown in FIG. The lid 9B shown in the figure is the vacuum double main pipe 5.
An O-ring 11 is interposed at the open end of the holder and fitted onto the inner periphery of the holder.

In addition, the lid shown in FIG. 5 has a fluid conduit 12 that guides the heating medium toward the bottom of the inner glass tube attached to one hole 7 of the lid 9A shown in FIG. ni, O
The lid shown in FIG. 6 is fitted to the outer periphery with a ring 10 interposed therebetween, and the lid shown in FIG. It is equipped with a partition plate (buckle plate) 13 that divides the area except near the bottom into two, and the lid 9C shown in FIG. The cross-sectional shape of the opening end has been slightly changed.

Reference numeral 15 denotes a spacer which is engaged at a plurality of points with a small protrusion 16 formed near the bottom of the outer glass tube 4 in order to maintain a gap between the inner glass tube 3 and the outer glass tube 4.

As shown in FIGS. 2 and 8, the heating medium passage 1 is formed into two stages, upper and lower, with a heating medium introduction passage 17 and a heating medium discharge passage 18 separated from each other. Twelve openings 19.20 are formed on both the left and right sides, and the holes 7 and 8 of the lid 9 that close the open end of the solar heat collecting tube 2 are laterally opposed to the openings 19.20. The solar heat collection pipe 2 is connected to the heat medium passage 1 through valve mechanisms 21 and 22.

That is, each opening 19 of the inlet passage 17 and the discharge passage 18
．． A gasket 23.24 having excellent weather resistance, heat resistance, and liquid tightness is provided on the gasket 20 to prevent the heat medium from leaking from the contact surface with the openings 19 and 20, and a through hole formed in the gasket 23.24 is provided. 25 and 26, the valve bodies 27 and 28 are fitted to be slidable in the axial direction.

On one side of the valve bodies 27 and 28, there is a single-letter-shaped guide 29,
30, a cross shape, a star shape, or other appropriate shape, and on the other side, an annular groove for holding the other ends of compression springs 31 and 32, one end of which is fixed in the introduction path 17 and the discharge path 18. Guide 2 of the valve mechanism 21, 22 formed in this way
9.30 into the through holes 25, 26, and the guide 29.
30 straight plane and gasket 23, through hole 25 of 24
, 26 to form a heat medium flow path between the valve bodies 27, 2.
8 in the free state, by the action of the compression springs 31 and 32, those located on the left side of Figure 8 are pushed to the left, and those located on the right are pushed to the right, and are pushed individually to the left side in the same figure. As shown in the solar heat collecting pipe 2, when the heat collecting pipe 2 is installed, on the one hand, the open end surface of the heat collecting pipe 2 is connected to the gasket 23.
．． 24, the gasket 23.24 liquid-tightly seals the opening end surface of the solar heat collector V2, and on the other hand, a part of the opening end surface of the heat collecting pipe 2 is used to seal the valve body 27, 2B. By pressing the end faces of the guides 29, 30, the valve body 27, 28 is separated from the surface of the gasket 23, 24, and the inlet passage is opened through the flow path around the one face (flat face) of the guides 29, 3G. 17 and discharge passage 18
and the inside of the solar heat collecting pipe 2 are communicated with each other.

In addition, the compression springs 31 and 32 are used to provide elasticity when the solar heat collector tube is removed, for example, in order to actively remove the remains of the tube from the heating medium passage 1 in the event of breakage, as shown on the right side of FIG. The power is used to press the remains of the heat collecting pipe 2 and close the valve mechanisms 21 and 22 based on this, and if the outer glass tube 4 of the solar heat collecting pipe 2 is broken, the inlet passage 17 and the outlet passage 18 are closed. Prevent heating medium from leaking out.

In this way, the solar heat collecting tube of the present invention can clearly distinguish the heating medium introduction part and the heating medium discharge part by the heating medium introduction hole 7 and the discharge hole 8 formed in the lid 9, and the solar heat collecting pipe 2 is shown in FIG. With such a simple arrangement, the inlet parts and the outlet parts can be connected to each other in parallel and connected to the heating medium passage 1, and regardless of natural circulation or forced circulation, the heating medium entering from the inlet hole 7 can be connected to the inside of the pipe. The water is warmed by the water and discharged from the discharge hole 8, producing the same effect as using a U-shaped pipe.

Moreover, according to this solar heat collecting tube, even if the introduction hole 7 and the discharge hole 8 are not installed vertically side by side, if there is even a slight height difference between the two holes, the function as a solar heat collecting tube can be achieved. This has the effect of making it easy to drain water when preventing freezing.

In addition, since the opening end of the vacuum double heat collecting tube is closed with a lid 9 having an inlet hole 7 and an outlet hole 8, when the heat collecting tubes of the present invention are installed in parallel, it is possible to Since the holes 7 and 8 of the heat collecting pipe can be installed with a phase difference in the radial direction, it can be installed in a place with no slope or only a slight slope, and can be used for forced circulation type, natural circulation type or It can be used as a heat collection pipe for any type of heat collection device, such as an overflow type.

Furthermore, the present invention has a structure in which the lid 9 has the holes 7 and 8 for distinguishing between the introduction part and the discharge part of the heat medium, as described above, so that it can be provided at a very low cost, and the above-mentioned advantages are achieved. Coupled with the fact that it can produce effects that cannot be achieved with conventional solar heat collectors, the present invention has extremely high practicality.

[Brief Description of the Drawings] Fig. 1 is a partially omitted plan view of a heat collecting device equipped with one embodiment of the solar heat collecting tube of the present invention, and Fig. 2 is a partially omitted plan view of Fig. 1.
3 is a longitudinal sectional side view of the main parts showing the first embodiment of the present invention, FIG. 4 is a longitudinal sectional side view of the second embodiment, and FIG. 6 is a longitudinal side view showing the fourth embodiment, FIG. 7 is a longitudinal side view showing the fifth embodiment, and FIG. 8 is a longitudinal side view showing the fifth embodiment. FIG. 1...Heating medium passage, 2...Solar heat collection tube, 3...Inner glass tube, 4...Outer glass tube, 5...・Vacuum double main pipe, 6...
...Selective absorption membrane, 7...Introduction hole, 8...
・Discharge hole, 9... Lid, 10, 11...
Seal ring, 12...Fluid conduit, 13, 14
...Baffle plate, 17...Inlet path, 18...Discharge path, 19,20...
Opening, 21.22... Valve mechanism, 23.24...
...Gasket, 25, 26...Through hole,
29, 30... Guide, 31, 32...
・Compression spring.

Claims (1)

[Claims for Utility Model Registration] 1. An inner and outer glass tube with a bottom at one end and an open end at the other end,
The main body is formed by a vacuum double tube, which is double stacked with a required gap between them, and the mutual space between the inner and outer tubes is sealed and depressurized, and the surface of the inner glass tube has a large absorption in the solar radiation spectrum range. A solar heat collecting tube formed with a film surface having a characteristic of low emissivity in the thermal radiation spectral range, wherein a heating medium introduction part and a heating medium discharge part are protruded from the open end of the vacuum double main pipe with a required distance apart. A solar heat collecting tube in which a lid formed in a shape is covered with a ring interposed to seal the outer surface of the outer tube or the inner surface of the inner tube. 2. The solar heat collector tube according to claim 1, wherein the lid is made of rustless metal formed by press working. 3. The solar heat collection tube according to claim 1, wherein the lid is made of heat-resistant plastic. 4. The solar heat collection tube according to claim 1, wherein M is made of heat-resistant glass. 5. The solar heat collecting tube according to claim 1 of the utility model registration claim, wherein the lid is made of ceramics.