JPH0669661U - Vacuum type solar heat collector - Google Patents

Abstract

(57) [Summary] [Objective] The purpose of the present invention is to reduce the number of header tubes even when using multiple units of vacuum solar heat collectors, thus reducing the material cost of the header tubes. (EN) It is possible to provide a vacuum solar heat collector that can be kept low and that the number of pipes that connect each header pipe can be reduced, so that the connection work can be simplified and that the installation location is unlikely to be restricted. [Structure] An outlet side branch pipe 21 made of a copper pipe is brazed at four 180 ° target locations on the same circumference of the outlet side header pipe 19, and an inlet side header pipe 20 is connected to the outlet side. An inlet side branch pipe 22 made of a copper pipe is attached by brazing so as to be coaxially arranged in the branch pipe 21.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vacuum solar heat collector.

[0002]

[Prior art]

 In recent years, vacuum solar heat collectors that utilize the heat energy of sunlight as a heat source have been used in various industrial fields, and one of them is disclosed in Japanese Patent Publication No. 3-56387. , One end is sealed and the other end is squeezed to a small diameter and opened, and a transparent long cylindrical glass container whose inside is held in vacuum, and one end is sealed and the other end is squeezed to a small diameter. It is open, and it is placed coaxially inside the glass container via a support, and has a volume of at least 60% or more of the inner volume of the glass container. The outer surface of the glass container is coated with a selective absorption film for solar thermal energy. Some have a cylindrical metal water storage container and a water pipe inserted up to near the sealed end inside the water storage container.

In such a vacuum solar heat collector, 4 to 6 units are used as one unit, and these units are connected to a header tube. The header pipe consists of an inlet-side header pipe through which a heat medium such as water flows in and an outlet-side header pipe through which the heat medium flows out. Normally, the inlet-side header pipe is coaxially arranged inside the outlet-side header pipe. . A plurality of outlet side branch pipes are attached to the outlet side header pipes in parallel in the vertical direction, and a plurality of outlet side branch pipes are also arranged coaxially in each outlet side branch pipe. The inlet side branch pipe of the book is attached, the outlet side branch pipe is connected to the water storage container of the vacuum solar heat collector, and the inlet side branch pipe is connected to the vacuum solar heat collector water transfer pipe.

When water is warmed using the vacuum solar heat collector having such a configuration, if water is supplied from the inlet header pipe, the inlet branch pipe and the water guide pipe of the vacuum solar heat collector are connected. After that, the water flows into the water storage container, and when it is pumped during the day when it is full of water, the water is heated by solar heat. After that, when new water is fed into the water storage container, the water warmed in the water storage container is pushed out from the outlet side branch pipe to the outlet side header pipe through the gap between the water guide pipe and the connecting pipe to the outside. The water taken out and heated in the header pipe on the inlet side is heated by the hot water in the header pipe on the outlet side, so that the water is prevented from freezing in winter.

[0005]

[Problems to be solved by the device]

 However, when connecting multiple units of vacuum solar heat collectors to header pipes as described above, the header pipes are required for each unit, which increases the material cost and the number of pipes connecting each header pipe. As the number of connections increases, the connection work is complicated. Furthermore, depending on the installation location, it may not be possible to secure a space for mounting multiple header tubes.

An object of the present invention is to reduce the number of header tubes even when using a plurality of units of vacuum solar heat collectors, so that the material cost of the header tube can be kept low. Moreover, since the number of pipes for connecting each header pipe can be reduced, the connection work can be simplified, and the installation location is less likely to be restricted.

[0007]

[Means for Solving the Problems]

 The vacuum solar heat collector of the present invention has one end sealed with a transparent long cylindrical glass container whose one end is sealed, the other end is narrowed to a small diameter and opened, and the inside is held in vacuum. , The other end is narrowed to a small diameter and opened, and the whole is coaxially arranged inside the glass container through a support and has a volume of at least 60% or more of the inner volume of the glass container, Equipped with multiple vacuum solar heat collectors with a cylindrical metal water storage container coated with a selective absorption film for solar heat energy and a water conduit inserted up to near the sealed end inside the water storage container. The header pipe is coaxially arranged in the outlet side header pipe, the outlet side branch pipes are attached to the outlet side header pipe at multiple locations on the same circumference, and the inlet side header pipe is installed in the outlet side branch pipe. Multiple branch pipes on the inlet side so that they are arranged coaxially Mounted, the outlet-side branch pipe communicates with the reservoir container of the vacuum solar heat collector, an inlet side header pipe, characterized by comprising communicating with the conduit of the vacuum embodiment heat heat collector.

[0008]

[Action]

 According to the vacuum solar heat collector of the present invention, the inlet-side header pipe and the outlet-side header pipe are respectively attached to the inlet-side branch pipe and the outlet-side branch pipe at a plurality of locations on the same circumference. Since a plurality of vacuum solar heat collectors can be connected to the, it is possible to reduce the number of header tubes.

That is, according to the present invention, for example, an inlet-side header pipe and an outlet-side header pipe are prepared, and the inlet-side branch pipe and the outlet-side branch pipe are provided at 180 ° symmetrical positions on four identical circles at regular intervals. When the branch pipe is attached, it becomes possible to connect eight vacuum solar heat collectors to one header pipe.

[0010]

【Example】

 Hereinafter, the vacuum solar heat collector of the present invention will be described in detail based on embodiments.

FIG. 1 is a schematic sectional view of a vacuum solar heat collector of the present invention.

In the figure, a vacuum solar heat collector 10 has a transparent long cylindrical glass container 11 whose one end is hermetically sealed, the other end is narrowed to a small diameter and opens, and the inside of which is held in vacuum. , One end is sealed, the other end is narrowed to a small diameter and opened, and the whole is coaxially arranged inside the glass container 11 through the support tool 12 and occupies 60% or more of the inner volume of the glass container 11. A metal water storage container 13 having a cylindrical shape and having an outer surface coated with a selective absorption film (not shown), and a water conduit 14 inserted up to near the sealed end inside the water storage container 13. It becomes.

The glass container 11 is manufactured by welding the ends of two glass caps formed in a predetermined shape to a glass tube forming the outer shell member of the vacuum solar heat collector 10. An exhaust pipe 11a is formed in the center of one of the glass caps. The exhaust pipe 11a is closed after exhausting the inside of the glass container 11, and a rubber cap 15 is fitted on the exhaust pipe 11a. . An opening is formed in the center of the other glass cap, and one end of the glass sealing metal fitting 16 is attached to the opening. The glass sealing metal fitting 16 has a cylindrical shape and is made of a material which can be well sealed with the glass container 11. For example, when the glass container 11 is soda lime glass, 42% Ni-6% Cr steel, borosilicate glass In the case of, it is made from Kovar alloy.

At the other end of the glass sealing metal fitting 16, one end of a cylindrical intermediate joint sealing metal fitting 17 is attached by welding so as to cover the outer periphery thereof, and the other end of the intermediate joint sealing metal fitting 17 is connected to a connecting pipe. 18 is welded and connected. The intermediate sealing member 17 is made of the same metal as the connecting pipe 18 or a metal having a substantially same thermal expansion coefficient and excellent corrosion resistance.

The water storage container 13 is formed by processing a metal plate made of stainless steel, copper, iron, or the like into a cylindrical shape, and welding the joints thereof to form a side body portion. It is manufactured by welding and sealing a sealing cap made of the same metal as the part or a metal having a similar thermal expansion coefficient.

The outlet-side header pipe 19 is made of a copper pipe, and an inlet-side header pipe 20 made of a copper pipe is coaxially arranged inside the outlet-side header pipe 19. An outlet side branch pipe 21 made of a copper pipe is brazed to four target locations on the same circumference of the outlet side header pipe 19 at 180 °, and an inlet side header pipe 20 is connected to the outlet side branch pipe 21. An inlet side branch pipe 22 made of a copper pipe is attached by brazing so as to be coaxially arranged therein.

One end 19 a of the outlet-side header pipe 19 is narrowed, and a copper cap 23 having a small hole through which the inlet-side header pipe 20 penetrates is attached to the other end, whereby the outlet-side header pipe 19 is connected. Both ends of the header pipe 19 are opened with a small diameter. Further, one end 20a of the inlet-side header pipe 20 is open, but the other end 20b is molded into a flat shape by embossing and is closed. The flat end 20b of the inlet-side header pipe 20 is in contact with the inner surface of the outlet-side header pipe 19, so that the inlet-side header pipe 20 does not move.

The outlet side branch pipe 21 attached to the outlet side header pipe 19 is connected to the connection pipe 18 of the vacuum solar heat collector 10 by welding, communicates with the water reservoir 13, and the inlet side header pipe 20. The inlet side branch pipe 22 attached to is connected to the water conduit 18 of the vacuum solar heat collector 10 by welding.

When the vacuum solar heat collector having such a configuration is used, the header pipe is installed on the roof or the like so as to be parallel to the ground, and, for example, the opening end 20a of the inlet-side header pipe 20 is decompressed and reversely installed. When water is supplied from the inlet-side header pipe 20 by connecting to the tap water through a stop valve (not shown), the water passes through the eight inlet-side branch pipes 22 and the water pipes of each vacuum solar heat collector 10 are introduced. When it flows into the water storage container 13 made of metal from 14 and is pumped during the day when it is full of water, the water is warmed by solar heat. Then, when a hot water tap (not shown) in the kitchen or bathroom is opened, new water flows into the metal water storage container 13 due to the water pressure, and the water warmed in the metal water storage container 13 is transferred to the water pipe. It is pushed out from the outlet side branch pipe 21 to the outlet side header pipe 19 through the gap between the connection pipe 14 and the connection pipe 18, and is taken out from the hot water tap.

FIG. 2 is also a schematic sectional view of the vacuum solar heat collector of the present invention.

In the figure, the first and second outlet-side header pipes 24 and 25 are made of copper pipes, and inside thereof, the first and second inlet-side header pipes 26 made of copper pipe are coaxially formed. 27 are arranged.

The first and second outlet-side header pipes 24 and 25 and the inlet-side header pipes 26 and 27 are shorter than the outlet-side header pipe 19 and the inlet-side header pipe 20 in FIG. 1, but are similar to these. It has the configuration of.

The first and second outlet side branch pipes 28 and 29 made of copper pipes are installed at the target positions of 180 ° on the same circumference of the first and second outlet side header pipes 24 and 25. It is attached. Further, each inlet side header pipe 26, 27 is provided with an inlet side branch pipe (not shown) made of a copper pipe so as to be coaxially arranged in the first and second outlet side branch pipes 28, 29. It is attached by brazing.

The opening of the first outlet-side header pipe 24 is connected to the opening of the second inlet-side header pipe 27 by welding, and the outlet-side branch pipes 28 and 29 are the same as in FIG. The inlet side branch pipe is connected to each connecting pipe 31 of the vacuum solar heat collector 30 having the above structure by welding, and the inlet side branch pipe is welded to a water conduit pipe (not shown) of the vacuum solar heat collector 30. Connected.

When the vacuum solar heat collector having such a configuration is used, each header tube is installed on the roof or the like so as to be parallel to the ground, and for example, the opening of the first inlet-side header tube 26 is provided. When the end 26a is connected to the tap water through a pressure reducing check valve (not shown) and water is supplied from the first inlet-side header pipe 26, the water passes through the four inlet-side branch pipes, and then to them. It flows into the metallic water storage container (not shown) from the water conduits of the four vacuum solar heat collectors 30 that communicate with each other. Further, after flowing from the first outlet side branch pipe 28 into the outlet side header pipe 24 through the gap between the water conduit and the connection pipe 31, the second inlet side header pipe 27, the inlet side branch pipe, four vacuum type When the water flows into the metallic water storage container through the water conduit of the solar heat collector 30 and is pumped during the daytime, the solar heat warms the water in the metallic water storage container.

In particular, according to this vacuum solar heat collector, each header pipe is connected in series and heated by four vacuum solar heat collectors 30 which are connected to the first inlet-side header pipe 26. The water is heated again in the vacuum solar heat collector 30 which is connected to the second inlet-side header pipe 27 again, so that it is possible to obtain water of considerably high temperature.

FIG. 3 is a perspective view of the vacuum solar heat collector of the present invention.

In the figure, the outlet-side header pipe 32 and the inlet-side header pipe (not shown) coaxially arranged inside the outlet-side header pipe 32 are located at the target positions of 90 ° on the same circumference at substantially the center. Four outlet side branch pipes (not shown) and inlet side branch pipes (not shown) are brazed, and these outlet side branch pipes and inlet side header pipes are the same as in FIG. Four vacuum solar heat collectors 33 having the structure are attached.

When this vacuum solar heat collector is installed on a roof or the like, a mount is used so that each header tube is perpendicular to the ground and each vacuum solar heat collector 33 is parallel to the ground. Install.

[0030]

[Effect of device]

 As described above, the vacuum solar heat collector of the present invention can reduce the number of header tubes even when using a plurality of vacuum solar heat collectors. The number of pipes for connecting the header pipes can be reduced and the connecting work can be simplified.

In addition, the vacuum solar heat collector of the present invention has few restrictions on the installation location, and various designs can be obtained by devising the installation method.

[Brief description of drawings]

FIG. 1 is a schematic sectional view of a vacuum solar heat collector of the present invention.

FIG. 2 is a schematic sectional view of a vacuum solar heat collector of the present invention.

FIG. 3 is a perspective view of the vacuum solar heat collector of the present invention.

[Explanation of symbols]

 10, 30, 33 Vacuum type solar heat collector 11 Glass container 12 Supporting tool 13 Metal water storage container 14 Water guide tube 16 Glass sealing metal fitting 17 Intermediary sealing metal fitting 18, 31 Connection pipe 19, 24, 25, 32 Outlet side header Pipe 20, 26, 27 Inlet side header pipe 21, 28 Outlet side branch pipe 22 Inlet side branch pipe

Claims (1)

[Scope of utility model registration request] 1. A transparent long cylindrical glass container, one end of which is sealed and the other end of which is narrowed and opened to a small diameter, and the inside of which is held in a vacuum, and one end of which is sealed and the other end of which is a small diameter. And the whole is placed coaxially inside the glass container via the support, and at least 60% of the inner volume of the glass container is opened.
A cylindrical metal water storage container having the above-mentioned volume, on the outer surface of which a selective absorption film for solar thermal energy is formed by coating,
Equipped with multiple vacuum solar heat collectors with water conduits inserted up to near the sealed end inside the water storage container, the inlet-side header pipe is coaxially arranged in the outlet-side header pipe, and the outlet-side header pipe has the same circle. Outlet side branch pipes are attached to a plurality of locations on the circumference, and a plurality of inlet side branch pipes are attached to the inlet side header pipe so as to be coaxially arranged in the outlet side branch pipe. A vacuum-type solar heat collecting apparatus, characterized in that the inlet-side header pipe communicates with a water storage container of the vacuum-type solar heat collector and the inlet side header pipe communicates with a water guiding pipe of the vacuum-type solar heat collector.