JPS5846362Y2 - solar heat collector - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an improved structure of a solar heat collector.

In this type of device, a number of heat collectors with heat collection tubes inserted inside a translucent outer tube are arranged side by side, and a header is placed at the end of the heat collector to collect the heat medium. In many cases, heat collecting pipes were directly connected and communicated with this header.

However, since the heat collecting tube expands and contracts in its long axis direction due to heat reception, it is necessary to provide a meandering section in the front to allow for the expansion and contraction, and also to absorb the difference in thermal expansion between the heat collecting tube and the outer tube. Therefore, it was necessary to securely attach the tube to the outer tube via a telescopic member such as a bellows.

For this reason, two telescopic members are required, which complicates the structure, and the non-heat collecting portion of the heat collector becomes longer due to the interposition of the telescopic member such as a meandering part in the heat collecting pipe, which increases the amount of heat that can be collected relative to the installation area. The disadvantage was that the thermal area was reduced.

Also, if an expandable member is inserted in the heat collecting pipe and a heat medium such as water is passed through it,
There are disadvantages in that the expandable member becomes clogged with dust, or heat medium remains in the expandable member even when heat is not being collected, making the expandable member susceptible to corrosion and shortening the life of the entire device.

An object of the present invention is to make it possible to absorb the expansion and contraction of the heat collection tube without interposing an expansion/contraction member in the heat collection tube to connect the heat collection pipe to the header.

In order to achieve this object, in the present invention, a heat collecting tube is inserted into a translucent outer tube, and the outer periphery of the heat collecting tube protruding from the outer tube is hermetically connected to the end of the outer tube by an elastic member.

Further, the end opening of the protruding heat collecting pipe is arranged opposite to the communication hole of the header with a distance therebetween.

Then, this −\jidder continuous communication hole and the end of the outer tube are connected by a connecting tube arranged around the outer periphery of the heat collecting tube and the expandable member.

In the present invention having such a configuration, even if the heat collecting tube expands and contracts due to heat reception, the expansion and contraction can be absorbed by one expandable member that connects the heat collecting tube and the outer tube.

Furthermore, since the heating medium is not passed through the inside of the expandable member, there is no problem that the expandable member is clogged with dust or that the heat medium remains when the heat is not collected and the expandable member corrodes.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Below, embodiments of the present invention shown in the drawings will be described.

Reference numeral 1 denotes an outer tube made of glass that dominates the external shape of the heat collector, and a heat collecting tube 2 is coaxially inserted through the center of the outer tube, and the opening at the end of the heat collecting tube 2 is connected to the communication hole 4 of the header 3 at a distance. They are placed facing each other.

Reference numeral 5 denotes a closing end plate fixed to the end of the outer tube 1, and around the heat collecting tube 2 in the center thereof, there is a boss 6 which protrudes toward the penetrating end of the tube 2 and whose diameter is reduced at the tip end. is formed.

Reference numeral 7 denotes a metal cylindrical bellows (expandable member) disposed coaxially around the outer periphery of the insertion end of the heat collecting tube 2, one end of which is fixed to the outer periphery of the heat collecting tube 2 protruding from the outer tube 1. The other end is fixed to the diameter-reduced tip of the boss 6 of the end plate 5, thereby making the inside of the outer tube 1 airtight.

Note that air is removed from the inside of the outer tube 1 by an appropriate means to create a substantially vacuum.

Reference numeral 8 denotes a large-diameter connecting pipe coaxially arranged at the penetration end of the heat collecting pipe 2 and the outer periphery of the bellows 7, one end of which is welded to the communication hole 4 of the header 3, and the other end connected to the boss of the end plate 5. 6, thereby making the heat collecting pipe 2 communicate with the header 3.

Note that 9 is a plate-shaped heat collecting fin fixed to the outer periphery of the heat collecting tube 2 within the outer tube 1.

Thus, when the heat collecting tube 2 expands and contracts in its long axis direction due to heat reception, the bellows 7 absorbs the expansion and contraction, and no strain force is transmitted to the heat collecting tube 2 itself or the header 3.

In addition, since the heat medium in the heat collecting tube 2, for example water, comes into contact with the outer peripheral surface of the bellows 7, there is no fear that the bellows 7 will be clogged with dirt, and after heat collection is completed, water can be poured to prevent freezing or boiling. When the bellows 7 is pulled out, no water remains in the valley of the bellows 7, and there is no fear that the bellows 7 will corrode.

Next, in the embodiment shown in FIG. 2, the connecting pipe 8 is connected to the header 3.
and the end plate 5, and attach a union screw 1 to each divided body.
0 and a union collar 11 are attached, and these are connected with a union nut 13 with a gasket 12 in between.

Thus, when the outer tube 1 etc. is damaged due to stone throwing or other causes, the union nut 13 is removed, the header 3 and the damaged heat collector are separated and replaced.

Therefore, in this embodiment, attachment and replacement of the heat collector to the header 3 becomes very easy.

In this way, the solar heat collecting device according to the present invention fixes the space between the outer pipe and the heat collecting pipe with an elastic member such as a bellows, connects the header and the outer pipe with a connecting pipe, and connects the heat collecting pipe to this connecting pipe. Because they are connected, even if the heat collecting pipe expands and contracts due to heat reception, the expansion and contraction is absorbed by the single bellows that connects the heat collecting pipe and the outer pipe, so that strain is not transmitted to the heat collecting pipe itself or the header. Wear.

Therefore, there is no need to provide an extensible member such as a meandering part in the heat collecting pipe itself, and the structure can be simplified and the heat collecting area relative to the installation area can be prevented from decreasing.

Furthermore, since the heat medium can be prevented from flowing through the expandable member, the expandable member will not be clogged with dirt or corroded, which will shorten the life of the device.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a solar heat collector according to the present invention, and FIG. 2 is a sectional view of another embodiment. 1... Outer tube, 2... Heat collecting tube, 3...
...Header, 5...End plate, 7...
Bellows, 8... Connection pipe.

Claims (1)

[Scope of utility model registration request] A heat collecting tube is inserted into a translucent outer tube, and the outer periphery of the heat collecting tube protruding from the outer tube is airtightly connected to the end of the outer tube using an elastic member, and the opening at the end of the heat collecting tube is connected to the communication hole of the header. A solar heat collecting device in which the communication hole of the header and the end of the outer tube are connected with a connecting tube arranged around the outer periphery of the heat collecting tube and the expandable member.