JPH048698B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a solar heat generating device that is installed on the roof of a building in a snow removal zone, and is used as a snow melting device during snow removal in winter, and is also effectively used as a solar heat collecting device during periods other than snow removal in summer. Regarding a snow melting device that also serves as heat collection.

This invention has both of the above-mentioned functions, improves effective operating efficiency throughout the year, substantially reduces equipment costs, and is easy to install. The aim is to provide a dual-purpose device.

For the above-mentioned purpose, this invention embodies both the functions of snow melting and solar heat collection by using a heat pipe. In some cases, a plurality of heat pipe branch pipes are arranged in parallel between the lower header constituting the evaporation section, and solar heat is collected and radiated from each branch pipe of the heat pipe. The plates are installed in contact with each other, and a water pipe for solar heat collection is installed in the upper header, and a water pipe for snow melting is installed in the lower header, with a predetermined gap left between them and the inner surface of each header. At the same time, a plurality of panel-shaped equipment units having the above configuration are laid side by side on the roof subsurface, and the water pipe is connected to the plurality of equipment units and penetrates both their upper and lower headers. The present invention provides a snow melting device for solar heat collection and snow melting, which is characterized by:

This will be further explained below based on illustrated embodiments.

In the figure, the heat pipe H includes a closed tubular upper header 1 placed horizontally on the ridge of the roof;
Sealed tubular lower header 2 placed in the same eave area
, and a plurality of heat pipe branch pipes 3 which are arranged perpendicularly, that is, vertically in parallel, with their both ends communicating with each other. A metal solar heat collecting/radiating plate 4 is tightly attached to each heat pipe branch pipe 3 by high-frequency welding or the like, with the branch pipe being fitted into a corresponding recess 4a on the lower surface. . Katsuko solar heat collection and heat sink plate 4
The side edges of adjacent ones are joined by welding or the like, and the whole is formed into a single plate of the required size. Further, on the lower surface side of the heat pipe H, a heat insulating material 5 made of a hard synthetic resin foam or the like is integrated in a stacked manner.

The upper header 1 of the heat pipe H serves as a condensation part for the working fluid during solar heat collection, and a water passage pipe 6 for solar heat collection is inserted and installed inside the header 1 passing through it in the axial direction. There is.

On the other hand, the lower header 2 serves as an evaporation section for the working fluid during snow melting, and a snow melting water pipe 7 is inserted thereinto so as to penetrate in the axial direction.

Both of the water pipes 6 and 7 are designed to form a condensation section and an evaporation section for the working fluid by leaving a predetermined gap between them and the inner surface of each header 1 and 2, and the inner surfaces of both of them are arranged in the axial direction. The grooved surface 8 is formed with a large number of linear or spiral grooves 8a. Further, the outer circumferential surface of the heat collecting water pipe 6 has a condensation promoting surface 9 with a surface condition most suitable for condensing the working fluid, and the outer peripheral surface of the snow melting water pipe 7 has a surface state most suitable for evaporating the working fluid. They are respectively formed on the evaporation-promoting processed surface 10 in the surface state. Both of these condensation and evaporation promoting surfaces 9 and 10 are formed into uneven or grooved surfaces by chemical or mechanical processing, or by sintering, brazing, etc. of metal powder. Therefore, it is formed on a porous surface.

The device unit formed into one panel with the above configuration is laid in the required number on the roof subsurface, with one upper header located at the ridge of the roof and two lower headers located at the same eave. Ru. Water pipes 6 and 7 are passed through the upper and lower headers 1 and 2 of each of the plurality of equipment units in succession, and are placed over the installed equipment units as shown in FIG. A roofing material 11 made of a metal plate or the like is installed with its lower surface in contact with the heat collecting/radiating plate 4.

In this installation state, if you want to melt snow on the roof this winter, you will need to use the heat pipe H.
In the snow melting water pipe 7 that penetrates the lower header 2 of
Hot water is passed from a separately installed hot water tank 12. Then, the working fluid in the lower header 2 is evaporated by the heat of the hot water, and while it rises in each heat pipe branch pipe 3 and reaches the upper header 1, it emits the latent heat of evaporation, and is transferred through the heat collecting and radiating plate 4. Roofing material 1
1 and melt the snow on top of it. On the other hand, the working fluid that has released latent heat and condensed naturally flows down inside the heat pipe branch pipe 3 and returns to the lower header 2, and by repeating the above cycle, the snow melting effect on the roof is continuously performed. Realized.

In addition, during seasons such as summer when snow melting is not required, the upper header 1
Cold water is passed through the heat collecting water pipe 6 inside. Then, during such a period, the working fluid in the heat pipe H reaches a high temperature due to the heat collecting/radiating plate 4 being considerably warmed by solar heat, and as a result, the working fluid in the heat pipe branch pipe 3 and the upper header 1 Since it exists as high-temperature steam in the water pipe 6, the water pipe 6
The water inside is heated, turned into hot water, and collected into the hot water storage tank 12. On the other hand, the working fluid that releases latent heat and condenses through heat exchange with the water in the water pipe 6,
While flowing down naturally in the heat pipe branch pipe 3 toward the lower header 2, it is evaporated again, and the above cycle is repeated. Therefore, by repeating this process, solar heat can be continuously collected using water as a medium.

In the above description, the roofing material 11 is separately covered over the heat collecting/radiating plate 4, but the heat collecting/radiating plate 4 itself may also be used as a roofing material. In this case, a blackened film such as a solar heat selective absorption film may be formed on the surface of the heat collecting and heat dissipating plate 4 to increase the heat collecting efficiency.

According to the device according to the present invention, as described above,
In addition to being used as a snow melting device on the roof, it can also be used as a solar heat collector when snow melting is not required, improving the operating efficiency throughout the year. Compared to the case where each device is installed separately, the equipment cost can be significantly reduced, which is economically advantageous. Alternatively, a heat pipe can be used by inserting and installing a water pipe in the form of a double pipe into the header, and evaporating or condensing the working fluid using hot or cold water passed through the pipe as a medium. Since the heat pipe is actuated, the heat transfer resistance between the water pipe and the heat pipe is small, and good heat transfer is performed between the two, allowing efficient snow melting and solar heat collection.

In addition, compared to the case where water is passed through the water pipes along the heat collecting and heat dissipating plate, the water flow pressure loss is smaller.
Pumps and the like are relatively small and can be installed at low cost, and there is little risk of damage to the device due to freezing of the heat medium.

Furthermore, since the device according to the present invention is a so-called unit type device constructed by arranging a plurality of panel-shaped device units having the above-mentioned structure on the roof subsurface, Depending on the size, the size of the roof surface can be easily accommodated by laying a required number of them. In addition, each unit is connected to each other by a water pipe, which has the effect of increasing the strength of the entire device.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is a partially cutaway perspective view, FIGS. 2 and 3 are sectional views taken along lines - and - in FIG.
FIG. 4 is a schematic explanatory diagram showing the configuration of the water flow circuit when installed on the roof. H... Heat pipe, 1... Upper header, 2
...Lower header, 3...Heat pipe branch pipe, 4
... Heat collection and heat dissipation plate, 5 ... Insulation material, 6 ... Water pipe for heat collection, 7 ... Water pipe for snow melting, 8 ... Grooved surface,
9... Condensation-promoting processed surface, 10... Evaporation-promoting processed surface.

Claims (1)

[Claims] 1. A plurality of heat pipe branch pipes are arranged in parallel between the upper header, which constitutes the condensing section during solar heat collection, and the lower header, which constitutes the evaporating section during snow melting, communicating with each other. A solar heat collection and heat dissipation plate is attached to each of the branch pipes of the heat pipe, and a solar heat collection water pipe is installed in the upper header, and a snow melting water pipe is provided in the lower header. Each header is inserted and installed in a penetrating manner with a predetermined gap between it and the inner surface of each header, and a plurality of panel-shaped device units having the above configuration are laid side by side on the roof subsurface, and a plurality of the water pipes are installed. 1. A snow melting device for solar heat collection and snow melting, characterized in that the snow melting device is continuous with the upper and lower headers of each of the above-mentioned device units.