JP2565467Y2 - Header device for vacuum solar collector - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a header device for a vacuum solar heat collector.

[0002]

2. Description of the Related Art In recent years, vacuum solar heat collectors utilizing the heat energy of sunlight as a heat source have been used in various industrial fields.
As disclosed in Japanese Patent No. 387, one end is sealed, the other end is narrowed and opened to a small diameter, and a transparent long cylindrical glass container whose inside is kept in a vacuum, and one end is sealed. The other end is squeezed to a small diameter and opened, the whole is coaxially arranged inside the glass container via a support, has a volume of at least 60% or more of the inner volume of the glass container, and has an outer surface thereof. There is a cylindrical water storage container coated with a selective absorption film of solar heat energy and a water storage tube inserted near the sealed end inside the water storage container.

[0003] In the above-mentioned vacuum solar heat collector, a heat medium such as water is taken in and out by an inlet header pipe leading to a water pipe and an outlet header pipe leading to an opening of a glass container. Usually, a plurality of branch pipes are attached to a predetermined portion of the outlet header pipe, and the inlet header pipe is coaxially arranged in the outlet header pipe, whereby water in the inlet header pipe freezes. Can be prevented. A plurality of branch pipes are attached to the inlet header pipe so as to be coaxially arranged in the branch pipe of the outlet header pipe, and the branch pipe of the outlet header pipe is connected to the open end of the glass container. The branch pipes of the inlet-side header pipe are connected to the headrace pipe, and each branch pipe is connected to the header pipe such that the central axis thereof is substantially perpendicular to the central axis of each header pipe.

In such a vacuum solar heat collector and header device, first, when water is supplied from one end of the inlet header pipe, the water is divided into a plurality of branch pipes attached to the inlet header pipe, and the vacuum solar heat collector is provided. After flowing into the metal water storage container through the water conduit of the heater and being pumped for a certain period of time,
When new water flows into the metal reservoir from the inlet header pipe, hot water flows into the outlet header pipe through a plurality of branch pipes attached to the outlet header pipe, and is taken out from one end thereof. .

[0005]

As described above, the branch pipe attached to each header pipe is connected to the header pipe such that the central axis thereof is substantially 90 ° with respect to the central axis of each header pipe. The vacuum solar heat collector and the header device are mounted so that the central axis of the glass container of the vacuum solar heat collector is approximately 90 ° with respect to the central axis of the outlet header tube. Depending on the mounting location, it may be required to mount the glass container so that the central axis of the glass container has an angle of 10 to 80 ° with the central axis of the outlet header tube.

That is, the above-mentioned vacuum solar heat collector is usually installed such that the angle of the center axis of the glass container with respect to the ground, that is, the angle to the ground is about 15 to 30 °.
When installing on a wall or a veranda of a building, the installation space is restricted, and the mounting height may be restricted. In such a case, the ground angle is set to 90 ° or an angle close thereto. And the central axis of the glass container is 10 to 8 with respect to the central axis of the outlet side header tube.
Attempts have been made to provide an angle of 0 °, thereby adjusting the height to a desired height in a small space.

In order to connect the glass container so that the central axis of the glass container has an angle of 10 to 80 ° with respect to the central axis of the outlet side header tube, as shown in FIG.
Oval holes 11a and 12a are formed at predetermined positions of the outlet side header pipe 11 and the inlet side header pipe 12, and these holes 1a and 1b are formed.
After slightly bending the edges of 1a, 12a outward, branch pipes 13, 14 having an outer peripheral shape matching those shapes
Need to be inserted into the holes 11a, 12a and connected by brazing or welding. However, since the shape of the connection portions 15, 16 is elliptical and the connection area is large, the holes 11a,
It becomes difficult to process the 12a and the branch pipes 13 and 14 with high accuracy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a glass container having a central axis which is equal to that of the outlet header pipe without increasing the connection between the outlet header pipe and the inlet header pipe and the branch pipe attached thereto. 10 to 80 ° to the central axis
It is an object of the present invention to provide a header device for a vacuum solar heat collector, which can be attached at an angle.

[0009]

That is, in the header device of the vacuum solar heat collector according to the present invention, a plurality of branch pipes are attached at predetermined positions of the outlet header pipe, and the inlet header pipe is provided in the outlet header pipe. Are arranged coaxially, and a plurality of branch pipes are attached to the inlet side header pipe so as to be coaxially arranged in a branch pipe attached to the outlet side header pipe. The connection is made so that the central axis is at an angle of about 90 ° with respect to the central axis of each header pipe, and 10% from the middle with respect to the central axis of each header pipe.
It is characterized by being bent at an angle of up to 80 ° .

[0010]

According to the header device of the vacuum solar heat collector of the present invention, the branch pipes attached to each header pipe are connected such that the central axis thereof is substantially perpendicular to the central axis of each header pipe. Therefore, the joint between each header pipe and the branch pipe does not become large.

Further, since each branch pipe is bent in a certain direction from the middle thereof, the central axes of the glass container and the water guide pipe are:
Connecting the outlet side header tube and the glass container so as to have an angle of 10 to 80 ° with respect to the central axis of each header tube,
It becomes possible to connect the inlet side header pipe and the water pipe.

The material of the branch pipe in the present invention is as follows.
Copper, stainless steel, or the like is suitable, and is manufactured by bending a pipe of a predetermined length to a required angle using a press machine or a bender. As the material of the header tube, the same material as that of the branch tube, such as copper or stainless steel, is suitable, and both are connected by brazing or welding.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a header device for a vacuum solar heat collector according to the present invention will be described in detail based on embodiments.

FIG. 1 is a partial sectional view showing the header device 17 of the present invention.

In the figure, an outlet side header tube 18 made of a copper pipe having an outer diameter of 41.28 mm has an outer diameter of 28.58 mm.
An inlet header pipe 19 made of a copper pipe is coaxially arranged, and holes 18a and 19 having substantially perfect circular shapes are provided at predetermined positions.
a is formed. The edges of the holes 18a and 19a are slightly bent outward, and a branch pipe 20 made of a copper pipe having an outer diameter of 31.8 mm is inserted into the hole 18a of the outlet header pipe 18, while the inlet side is A branch pipe 21 made of a copper pipe having an outer diameter of 12.7 mm is inserted into the hole 19a of the header pipe 19, and these insertion portions are brazed. As a result, a plurality of branch pipes 21 are coaxially arranged in the branch pipe 20 attached to the outlet side header pipe 18.

[0016] Each branch pipe 20 and 21 are connected so as to be substantially 90 ° angle the center axis thereof with respect to the center axis of each header pipes 18 and 19, the center of each header pipe from the middle
It is bent at an angle of about 40 ° with respect to the axis .

One end 18b of the outlet header tube 18 is narrowed, and a copper cap 22 having a small hole through which the inlet header tube 19 is formed is attached to the other end. Both ends of 18 are opened with a small diameter. One end of the inlet-side header tube 19 is open, while the other end is flattened by embossing and closed. This inlet side header tube 1
The flat portion 19b formed at one end of the pipe 9 contacts the inner surface of the outlet header tube 18, thereby preventing the entrance header tube 19 from moving.

FIG. 2 is an explanatory view showing a state where a vacuum solar heat collector 23 is attached to the header device 17 of FIG.

In the figure, a transparent long cylindrical glass container 24 constituting a vacuum solar heat collector 23 is sealed at one end.
The other end is narrowed and opened to a small diameter, the inside is maintained at a predetermined degree of vacuum [for example, 10 ^-4 Torr], and has a length of 2000 mm and an outer diameter of 126 mm. Glass container 24
Is sealed at one end, the other end is narrowed and opened to a small diameter, and a selective absorption film (not shown) is attached to the outer surface, and the volume of the glass container 24 is 60% or more. The long cylindrical metal water storage container 25 which has it is arrange | positioned.

The metal water storage container 25 is made of stainless steel or copper, and a water pipe 26 is inserted therein. One end of the water pipe 26 is connected to the branch pipe 21 attached to the inlet header pipe 19. It is brazed to one end. Also the small diameter opening of the metal reservoir 25, one end of a metal connecting tube 27 is brazed, the other end of the connection pipe 27, branch pipe 20 attached to the outlet side header pipe 18
At one end. The water guide pipe 26 is inserted such that one end thereof is located at the back in the metal water storage container 25.

The glass container 24 is manufactured by welding the ends of two glass caps formed in a predetermined shape in advance to a glass tube constituting an outer shell member of the vacuum solar heat collector 23. In the center of one glass cap,
An exhaust pipe 24a is formed. The exhaust pipe 24a is closed after exhausting the inside of the glass container 24, and a rubber cap 28 is fitted thereon. The open end of the glass container 24, is mounted at one end of the glass sealing fitting 29. The glass sealing fitting 29 is cylindrical and has a glass container 24.
For example, when the glass container 24 is made of soda-lime glass, 42% Ni-6%
In the case of Cr steel or borosilicate glass, it is made of a Kovar alloy.

The metal water storage container 25 is formed by processing a metal plate into a cylindrical shape, welding a joint thereof to form a side trunk portion, and then opening the both end openings at the same or similar thermal expansion as the side trunk portion. It is manufactured by welding and closing a sealing cap made of a metal material having a coefficient. A small-diameter outer peripheral portion is formed in the sealing cap located on the sealed end side of the metal water storage container 25, and supports 30 and 31 made of wire springs are attached to this portion.
5 can be coaxially supported in the glass container 24 while allowing thermal expansion and contraction.

The other end of the glass sealing fitting 29 is welded to one end of a cylindrical resilient fitting 32 so as to cover the outer periphery thereof, and the other end is welded to the connection pipe 27. Intermediate fitting 32
Is made of the same metal as the connection pipe 27 or a metal having substantially the same thermal expansion coefficient and excellent corrosion resistance.

When using such a vacuum solar heat collector, one end of the inlet header pipe 19 is first connected to a water supply through a pressure reducing check valve (not shown), and water is supplied from the inlet header pipe 19. When the water is supplied, the water is supplied to the branch pipe 21 and the water pipe 26.
After being supplied into the metal water storage container 25 through the container and pumped up in a full state for a certain period of time, when a hot water tap (not shown) of a kitchen or a bathroom is opened, the metal water storage container 25
New water flows into the inside, and the warmed hot water is pushed out to the outlet side header pipe 18 through the gap between the water guide pipe 26 and the connection pipe 27 and the branch pipe 20, and is taken out from the hot water tap.

[0025]

As described above, the header device of the vacuum solar heat collector according to the present invention does not increase the connection between the outlet side header tube and the inlet side header tube and the branch tube connected thereto. , So that the center axis of the glass container has an angle of 10 to 80 ° with respect to the center axis of the outlet header tube.

[Brief description of the drawings]

FIG. 1 is a partial cross-sectional view of a header device according to an embodiment.

FIG. 2 is an explanatory view showing a state where a vacuum solar heat collector is attached to the header device of FIG. 1;

FIG. 3 is a partial sectional view of a header device of a comparative example.

[Explanation of symbols]

 10, 17 Header device 11, 18 Outlet header tube 12, 19 Inlet header tube 13, 14, 20, 21 Branch tube 23 Vacuum solar collector 24 Glass container 25 Metal water reservoir 26 Water conduit

Claims (1)

(57) [Scope of request for utility model registration] A plurality of branch pipes are mounted at predetermined positions on an outlet header pipe, and an inlet header pipe is coaxially arranged in the outlet header pipe, and the outlet header pipe is provided with the outlet header pipe. A plurality of branch pipes are mounted so as to be coaxially arranged in the branch pipes mounted on the pipes, and each branch pipe has a central axis at an angle of about 90 ° to the central axis of each header pipe. The header device of the vacuum solar heat collector, wherein the header device is bent so as to be at an angle of 10 to 80 ° with respect to the center axis of each header tube from the middle thereof.