KR100543174B1 - Solar heat collectors using full-glassed vacuum pipe with annulus sealing device - Google Patents

Abstract

FIELD OF THE INVENTION The present invention relates to a solar collector of an all-glass vacuum pipe with an annular sealing device, and more particularly, a small diameter glass pipe coated with a special thickness to an outer surface inside and a large diameter pipe outside. It is isolated by vacuum and seals both ends, and cuts part of the outer pipe along its periphery and cuts the problem caused by the different thermal expansion between the inner and outer glass pipes. It is related to the structure of the solar heat collecting device that can maximize the convenience and economic efficiency of solar heat as well as thermal performance while maximizing the efficiency and applicability of solar heat as well as preventing freezing in winter.

Glass pipe, collector, antifreeze, sealer, corrugated pipe

Description

SOLAR HEAT COLLECTORS USING FULL-GLASSED VACUUM PIPE WITH ANNULUS SEALING DEVICE}

1 is a structural diagram of a conventional flat solar collector

Figure 2 (a) is a structural diagram of a conventional single vacuum tube solar collector

       (b) is a structural diagram of a conventional double vacuum tube solar collector

Figure 3 (a) is a structural diagram of a double vacuum tube solar collector using the "U" magnetic tube

       (b) is a structural diagram of a double vacuum tube solar collector using a heat pipe

Figure 4 is a perspective view of the glass vacuum pipe formed with the present invention corrugated pipe

5 is a cross-sectional view of the glass vacuum pipe formed with the present invention corrugated pipe

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<Description of the symbols for the main parts of the drawings>

(1) Inner glass pipe (2) Outer glass pipe

(3): sealing device (4): coating

(13): hollow part

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FIELD OF THE INVENTION The present invention relates to a solar collector of an all-glass vacuum pipe with an annular sealing device, and more particularly, a small diameter glass pipe coated with a special thickness to an outer surface inside and a large diameter pipe outside. It is isolated by vacuum and seals both ends, and cuts part of the outer pipe along its periphery and cuts the problem caused by the different thermal expansion between the inner and outer glass pipes. It is related to the structure of the solar heat collecting device that can maximize the convenience and economic efficiency of solar heat as well as thermal performance while maximizing the efficiency and applicability of solar heat as well as preventing freezing in winter.

In general, solar collectors for solar use are classified into two types of flat panel and vacuum tube solar collectors in consideration of their external structure and applicability.

The most widely used flat panel solar collector is a rectangular flat plate, and a heat collecting plate having a special chemical treatment on the surface of the thin metal plate made of copper or aluminum as shown in FIG. 31) was formed and welded to the surface of one side of the heat collecting plate 31, a plurality of thin paper tubes 32 (32 ') of the same material at regular intervals, inserted into a rectangular frame and covered with a transparent cover.

In the flat solar collector P as described above, a solar heat beam primarily heats the heat collecting plate 31, and a heat transfer medium (or water) transfers heat energy from the heated heat collecting plate 31 to the inside of the branch pipes 32 and 32 ′. Receives to join in the main building 33 of the upper flows to the heat storage tank 34 or heat exchanger.

The plate-type collector P may be used by directly heating water in the collector, but in an area where the cold weather is present, an antifreeze is used as a heat medium rather than water, and the antifreeze heated while passing through the collector heats the water secondarily. It is applied.

The flat plate collector P mainly uses solar heat of a low temperature range, that is, 80 ° C. or less, and heat loss from the heat collecting plate 31 to the outside due to convection from the heat collecting plate 31 is large. There was a problem such that the heat collection efficiency drops to about 50% or less.

In addition, the vacuum tube solar collector V has a glass tube shape and is capable of blocking heat loss due to convection by vacuuming a closed space in contact with the solar collector surface. FIGS. 2A and 2B. As in, there is a method using one glass tube and two glass tubes in the form of a double vacuum tube.

In the method of using one glass tube, a heat pipe 42 having a heat collecting plate 43 mounted therein is inserted into the glass tube 41, and the heat pipe 42 is protruded and installed at an upper end of the glass tube 41. In the metal stopper 44 is sealed and the inside of the vacuum treatment to prevent the heat loss to the outside due to convection solar heat collected from the heat collecting plate 43 surface.

Vacuum tube solar collector (V) of the type described above requires a fairly complicated process due to the glass and metal bonding problem in sealing the upper end of the glass tube 41 with a metal stopper 44, resulting in durability And economics.

In addition, the vacuum tube-type solar collector (V), which uses two glass tubes in the form of a double vacuum tube, is a glass double tube vacuum-treated between the outer tube 45 and a special surface-treated collector tube 46 for solar heat collection. To form a heat medium (liquid, water, etc.) inside the heat collecting tube 46 and seal the upper portion of the double tube with a heat insulating plug 47 to heat the heat medium filled inside the heat collecting tube 46 to circulate heat energy. The vacuum between the outer tube (45) and the collecting tube (46) to block the heat loss to the outside by air convection.

The above method does not have a problem in the production of the collector body, but if the heating medium (water) is filled directly into the heat collecting tube 46 and heated, if the water suddenly flows into the heat collecting tube 46 heated by winter heat and cold weather and solar heat There is a problem that the heat collecting phenomenon of the heat collecting tube 46 is damaged due to thermal stress, and the material of the outer tube 45 and the heat collecting tube 46 is made of glass and is directly connected to the heat storage tank. If there is a risk that water in the heat storage tank leaks into the broken tube. In addition, since this method directly heats the water in the heat collecting tube 46, the heat capacity of the water has a large design problem in that the size of the heat collecting tube 46 is not increased to increase the heat collecting area.

In order to supplement the above problems, the solar heat is collected by using a glass double tube as in the case of FIG. 3 (a) and (b).

In the case of FIGS. 3A and 3B, the copper plate 48 is rolled into the collecting tube 46 and inserted into and adhered to the inner surface of the collecting tube 46. Then, the “U” shaped copper tube 42 ′ or heat is inserted into the collecting tube 46. The method in which the pipe 42 is sandwiched between the collecting tube 46 and the inserted copper plate 48 is applied.

Inserting the copper plate 48 as shown in (a) and (b) increases the manufacturing cost with the complexity of using the system and the copper plate 48 and the "U" copper pipe 42 'or the heat pipe 42. There was a problem that the heat resistance is increased due to poor contact between the) and the heat collection efficiency is reduced thereby.

The present invention has been made to solve such a conventional problem, and by applying an antifreeze or various devices (coating) to the inner surface of the inner glass pipe efficiently, there is no need to worry about freezing in winter, the production of the heat pipe Or copper plate or "U" type copper tube, eliminating the hassle of inserting and adhering into the collecting tube, and the antifreeze in the collecting tube is heated directly with the heating of the collecting tube to minimize the thermal resistance and heat chain Since the antifreeze and ultimately the fluid (water, etc.) to be heated using solar energy are physically separated, no heat shock occurs and even if the heat collecting tube is partially damaged, the effect of the heat resistance is reduced so as not to affect the whole system. To overcome the increase and decrease in heat collection efficiency The purpose is.

In order to achieve the above object, a hollow portion is formed at the center while having a vertically constant length, and a coating portion having a constant thickness is formed on the outer surface of the inner glass pipe which is integrally connected and separated at regular intervals. In the solar heat collecting device that can be cut to a certain length in a ring shape, and configured to combine the elastic corrugated pipe with the cut portion to prevent freezing during winter and maximize the efficiency and applicability of solar heat. It is about.

Referring to the configuration and operation of the present invention in detail with reference to the accompanying drawings as follows.

Figure 4 is a perspective view of a glass vacuum pipe formed with a corrugated pipe of the present invention,

5 is a cross-sectional view of the glass vacuum pipe formed with the present invention corrugated pipe,

A hollow portion 13 is formed at the center while having a vertically vertical length, and a coating 4 portion having a constant thickness is formed on the outer surface of the inner side glass pipe 1 which is separated at regular intervals so that a space portion is formed on the inner side. In addition, the outer side glass pipe (2) integrally connected to the inner side glass pipe (1) is cut in a predetermined length in an annular shape, it is composed of the coupling device for mounting the sealing device (3) having elasticity in the cut portion It is done.

The operation of the present invention is as follows.

When the solar energy is irradiated to the collector during the sunshine period, the surface of the inner side glass pipe (1) where the specially coated coating (4) of black is formed to have a constant thickness as a selective absorption film among the double glass pipes constituting the collector is heated and heated. It heats up and heats the whole inner side glass pipe 1, and as a result, the installation or the filled heat medium installed in the empty space inside the inner side glass pipe 1 is heated.

The coating 4 is painted black and the inner glass pipe serves as a collecting tube.

The facility or filled heating medium is an antifreeze.

At this time, even if a significant temperature difference occurs between the heated inner side glass pipe 1 and the outer side glass pipe 2 formed integrally, the empty space between the two glass pipes is treated in a vacuum state, so that thermal The alternating current occurs insignificantly, so the heat loss to the outside is reduced by more than 50% compared to the flat solar collectors which are now widely used.

On the other hand, the temperature difference between the inner side glass pipe 1 and the outer side glass pipe 2 is different from the inner side glass pipe 1 and the outer side glass pipe 2 due to the difference in the degree of thermal expansion of the two glass pipes in the longitudinal direction. Thermal stress can also be created between them, which leads to the possibility of cracking at both ends of the connection between the two pipes.

In order to suppress this, the present invention cuts a part of the outer side glass pipe 2 in a ring shape along its outer circumferential surface, and the cut portion is fusion-bonded with a specially designed metal sealing device 3 to be integral with the outer side glass pipe. It will be installed.

The sealing device (3) is made of a corrugated pipe shape and the material is a synthetic resin coated with a surface so that the metal and the watertight is maintained.

This aims to ensure that the thermal expansion in the longitudinal direction by the temperature difference is equal.

In other words, by sealing a part of the outer glass pipe (2) with a material of a metal and a synthetic resin that can be contracted and expanded while sealing, the same degree in the longitudinal direction even if a temperature difference occurs between the two glass pipes By contracting or expanding, the thermal stress between the inner glass pipe 1 and the outer glass pipe 2 is essentially eliminated.

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The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by any person having ordinary skill in the art without departing from the gist of the present invention claimed in the claims. Of course, such changes will fall within the scope of the claims.

Therefore, in the present invention, the solar collector using the all-glass vacuum glass pipe in which the sealing device, which is a corrugated pipe, is fused and bonded, is considerably superior to the conventional all-glass vacuum tube solar collector, and has various forms of solar heat system. This is an invention that has the effect of improving the efficiency and convenience of using solar power.

Claims (7)

A hollow portion 13 is formed at the center and has a constant length vertically and is separated at regular intervals to form an inner side glass pipe 1 which is formed so that a space portion is formed on the inner side, and is integral with the inner side glass pipe 1. The outer surface of the glass pipe (2) connected by a ring-shaped cut in a constant length, the annular, characterized in that consisting of the coupling mounting the sealing device (3) having elasticity to the incision cut in the annular Solar collector of fully glass vacuum pipe with sealing device. The method of claim 1, Said sealing device (3) is a solar collector of an all-glass vacuum pipe with a ring-shaped sealing device, characterized in that the metal made of a corrugated pipe shape. The method of claim 1, The sealing device (3) of the solar collector of the full glass vacuum pipe formed in a ring-shaped sealing device, characterized in that the synthetic resin made of a corrugated pipe and the surface is coated to be watertight. delete delete delete delete

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