JPS5834385Y2 - solar heat collector plate - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heat collecting plate used in solar heat collectors and the like.

Generally speaking, a solar heat collector that obtains hot water using solar heat, as shown in FIG. It has a covered configuration and is installed in a sunny location, such as on a roof.

Figure 2 shows an example of the structure of the heat collecting plate 1, in which both the upper and lower edges are gutter-shaped, and an upper header 6 and a lower header 7 are formed, respectively.
A heat pipe flow path 8 is formed between each header 6.7.
. A condensing pipe 10 is passed through the header 6.

Each header 6.7 and flow passages 8, 8, . When the heat collecting medium is circulated, the heat transfer medium vaporized by solar heat moves to the upper header 6, condenses on the surface of the condensing pipe 10 and gives heat to the heat collecting medium, and the liquefied heat transfer medium flows through the flow path 8. It flows down and is vaporized again by the solar heat, and by repeating the above process, the solar heat is collected in the heat collecting medium.

By the way, in such a heat collecting plate 1, the upper header 6 and therefore the condensing pipe 10 are installed horizontally, but if they are not installed horizontally and, for example, point b is lower than point a. , most of the liquefied heat transfer medium is in the condensing pipe 1
0 to the point b side, and flows down to the lower header 7 side through the flow path 8b on the point b side and the flow path 8 in the vicinity thereof.

Therefore, as time passes, the heat transfer medium shifts toward point b, and although heat is absorbed and transferred by re-evaporation in the flow path 8b and the flow path 8 in its vicinity, the heat transfer medium hardly flows. In the flow path 8a on the point a side and the flow path 8 in the vicinity thereof, almost no heat collection action is performed, and the effective heat collection area becomes small, resulting in a decrease in efficiency.

Such tilting of the heat collecting plate can easily occur due to installation errors or other factors, so conventional heat collecting plates tend to suffer from a decrease in efficiency.
Further, there is a problem in that the work to prevent this is troublesome and it is difficult to completely prevent it.

The present invention was developed to solve these problems, and consists of a panel-like structure in which a plurality of heat pipe channels are installed in parallel between the headers provided at the top and bottom, respectively. In a solar heat collector plate with a condensation pipe inserted into the header, the heat transfer medium that has condensed on the condensation pipe into a liquid state is allowed to flow down evenly into each channel without moving in the axial direction of the Heragu. By providing a heat transfer medium guide, the heat transfer medium does not shift to one side, all flow paths exhibit their performance, and a solar heat collection plate is provided in which good heat collection efficiency can be maintained.

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

3 and 4 show a case in which a wick 12 is used as the heat transfer medium guide 11, and the wick 12 surrounds the condensing pipe 10, and its end 12a is introduced into the upper end of the flow path 8. Such a heat transfer medium guide 11 is provided independently for each flow path 8.

Since the condensing pipe 10 and each flow path 8 are connected separately by the wick 12 in this way, the heat transfer medium vaporized by solar heat condenses on the surface of the condensing pipe 10 and becomes liquid, and the condensing pipe 10 collects in the condensing pipe 10. After applying heat to the heating medium,
Since the heat is guided to each flow path 8 through the wick 12 and flows down the same flow path 8 in which it was vaporized last time, all of the flow paths 8 can perform the predetermined heat collecting function without any problem.

Note that when the heat transfer medium flows down, it is more effective if it flows down along the back surface of the surface plate 9. Therefore, as shown in FIG. It has a structure that is in contact with the back side.

5 and 6, a liquid cutter fin 13 and a partition protrusion 14 are provided as a heat transfer medium guide 11, and a liquid cutter fin 13 is provided on the condensing pipe 10 corresponding to each flow path 8, and A partition protrusion 14 is provided at the bottom of the upper header 6 in correspondence to each flow path 8.

The position of the liquid cutting fin 13 is aligned with the center line of each channel 8, and the position of the partition ridge 14 is aligned with the center line of each channel 8.
Match the boundaries of the area.

With this structure, the heat transfer medium that has condensed and liquefied on the surface of the condensing pipe 10 is blocked at the liquid cutter fin 13 even if the condensation pipe 10 is inclined, and the liquid cutter fin 13 to the upper header 6, and the flow path 8 is the same as when it was vaporized last time without going over the partition protrusion 14.
Therefore, the heat collecting effect is prevented from being concentrated in a part of the flow path 8.

Note that the shape of the liquid cutter fin 13 is not limited to a disk shape, and other shapes can be selected depending on the cross-sectional shape of the upper header 6, the depth of the flow path 8, etc. The depth of the liquid cutting fin 13 may not be very deep.
If the shape is appropriate and the heat transfer medium dropped into the upper header 6 directly flows down into the predetermined channel 8 without flowing in the lateral direction, the partition protrusion 14 can be omitted.

However, the installation angle of the heat collecting plate 1 (the heat collecting plate 1 relative to the horizontal plane)
When the angle of the heat collecting surface is small, providing the partition protrusions 14 can more reliably prevent the heat transfer medium from moving in the lateral direction.

FIG. 7 shows another embodiment, in which the condensing pipe 10 has a meandering shape, and the downward protrusion 15 is used as a heat transfer medium guide 11.

The meandering is performed in the same plane as the surface of the heat collecting plate 1, the pitch is selected to be equal to the interval between the flow channels 8, and the protrusions 15 are aligned with the center line of each flow channel 8, so that the condensing pipe 10 is The liquid heat transfer medium generated on the surface flows downward along the protrusion 15, drips from the tip to the upper header 6, and then flows down a predetermined channel 8, and the heat collecting action is concentrated in some channels 8. This prevents them from doing so.

Note that 14 is a partition protrusion similar to that in the embodiments of FIGS. 5 and 6, and can be provided as necessary.

FIG. 8 shows still another embodiment, in which the condensing pipe 1
0 in a spiral shape, and when the pitch is selected to be equal to the interval between the flow channels 8 and is installed in the upper header 6, the curved portions 16 facing near the boundary between the upper header 6 and the flow channels 8 are It is installed in line with the center line of each channel.

Therefore, the curved portions 16 serve as heat transfer medium guides 11 to allow the liquid heat transfer medium to flow down into the respective predetermined channels 8.

FIG. 9 shows an embodiment in which the condensation pipe 10 itself is not spiral-shaped, but two spiral protrusions 17 are provided on the outer surface. The upper header 6 is aligned so that the lower part 18 of the spiral protrusion 17 is aligned with the center line.
It can be installed on.

Therefore, the lower part 18 serves as the heat transfer medium guide 11, and the liquid heat transfer medium can be caused to flow down into the respective predetermined channels 8.

FIG. 10 shows an embodiment in which a large number of small protrusions 19 are provided on the surface of the condensing pipe 10, and droplets of heat transfer medium generated on the surface of the condensing pipe 10 are blocked by the small protrusions 19 and move laterally. In most cases, the heat transfer medium adheres to the small protrusions 19 and lengthens, and the small protrusions 19 act as heat transfer medium guides 11 and drip onto the upper header 6 at that position, each flowing down a predetermined flow path 8. It becomes like this.

However, in this embodiment, since the guiding effect is insufficient with only the small protrusions 19, the partition protrusion 19 is attached to the upper header 6.
Better results can be obtained by providing 4.

Although the above embodiments have all been described with respect to the case where the front plate 9 is flat, upper and lower headers 6 and 7 and channels 8 are formed on the front plate 9 in plane symmetry with the back plate 5. ,
The heat collecting plate 1 can be constructed by combining these parts, and as already mentioned, the partition protrusions can be provided as appropriate depending on the installation conditions.

As mentioned above, the present invention provides a heat transfer medium guide in the upper header, and allows the heat transfer medium that has condensed on the condensation pipe to flow down the predetermined flow path without moving it in the axial direction of the header. Therefore, the liquid heat transfer medium can be made to flow down equally into each channel.

Therefore, the heat transfer medium will not be biased to one side and the heat collecting action will not be concentrated in a part of the flow channels, and all of the flow channels will perform the prescribed heat collecting action, so heat can be collected effectively over the entire area. It has the advantage of being easy to install and exhibiting high heat collection efficiency regardless of the slight slope.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing the general configuration of a solar heat collector according to the present invention, Fig. 2 is a partially cutaway perspective view of a conventional example of a heat collecting plate, and Fig. 3 is an embodiment of the present invention. Partially cutaway perspective view of 4th
The figures are a sectional view taken along the line A-A in FIG. 3, FIG. 5 is a partially cutaway perspective view of another embodiment, FIG.
The figure is a partially cutaway perspective view of another embodiment, FIG. 8 is a perspective view of a main part of still another embodiment, FIG. 9 is a perspective view of a main part of still another embodiment, and FIG. 10 is a perspective view of a main part of still another embodiment. FIG. 7 is a perspective view of main parts of another embodiment. 1 is a heat collecting plate, 6 is an upper header, 7 is a lower header, 8
1 is a flow path, 10 is a condensing pipe, 11 is a heat transfer medium guide, 1
2 is a wick, 13 is a drain fin, 14 is a partition protrusion, 1
5 is a protruding portion, 16 is a curved portion, 17 is a spiral protrusion, 18 is a lower portion, and 19 is a small protrusion.

Claims (7)

[Scope of utility model registration request] (1) In a solar heat collector plate in which multiple heat pipe channels are installed in parallel between the headers provided in the upper and lower parts to form a panel, and a condensation pipe is inserted into the upper header, A solar heat collector plate is provided with a heat transfer medium guide that allows the heat transfer medium that has condensed and become liquid on the condensation pipe to flow down equally into each flow path without moving it in the axial direction of the header. (2) Utility Model Registration Scope of Claims The solar heat collecting plate according to claim 1, in which a wick communicating between the condensing pipe and the flow path is installed independently for each flow path. (3) Utility Model Registration Scope of Claim 1. The solar heat collecting plate according to claim 1, in which a liquid cutting fin is provided on the condensing pipe corresponding to each flow path. (4) Utility Model Registration Scope of Claim 1. The solar heat collecting plate according to claim 1, in which the condensing pipe is meandered and downward protrusions are arranged corresponding to each flow path. (5) Utility Model Registration Scope of Claim 1. The solar heat collecting plate according to claim 1, in which the condensing pipe is spirally shaped and the lower curved portion is arranged corresponding to each flow path. (6) Utility Model Registration In the solar heat collecting plate according to claim 1, a spiral protrusion is formed on the outer surface of the condensing pipe, and a portion located below the spiral protrusion corresponds to each flow path. Placed in such a way. (7) Utility Model Registration The solar heat collecting plate according to claim 1, in which a large number of small protrusions are provided on the surface of the condensing pipe.