KR101036261B1 - Flat plate type solar collector having device for preventing bending - Google Patents

Abstract

PURPOSE: A plate-type solar collector comprising an anti-bending device is provided to prevent damage to a support pipe since if the central part of a solar panel is inflated due to a high temperature, the solar panel is held in the opposite direction to bending by the anti-bending device. CONSTITUTION: A plate-type solar collector comprising an anti-bending device comprises a fixed angle(6), a square pipe(8), and a spring(9). The fixed angle is located on the lower parts of a plurality of support pipes(3) to intersect the support pipes. The fixed angle is fastened to a solar panel(4) at a plurality of points. The square pipe is coupled to one or both sides of the fixed angle. The spring is inserted into one or both sides of the square pipe. If the solar panel inflates and bends, the spring supplies elasticity in the opposite direction to bending. The spring comprises a lower support(91), a vertical support(92) and a frame support(93).

Description

Flat plate type solar collector having device for preventing bending

The present invention relates to a flat plate solar collector having a warpage prevention device, and in detail, the heat collecting plate constituting the solar collector is made of a thin metal plate during continuous solar absorption, and the center portion is bent due to thermal expansion. The present invention relates to a flat solar collector that prevents and enhances durability of the collector.

A solar collector is a device that collects energy from the sun and converts it into heat. It is a transparent glass or plastic plate that collects heat, absorbs solar heat, and stores it, and heats it with a heat storage tank using a heat transfer medium to use it for heating or hot water.

These solar collectors are largely divided into flat plate type and vacuum tube type.

The plate-type solar collector is formed in a rectangular flat plate body, and forms a heat collecting plate with a special chemical treatment on the surface of the thin metal plate manufactured using copper or aluminum to maximize absorption of the sun's rays. A plurality of thin paper tubes made of a common copper material receiving heat from them are arranged at regular intervals and welded to be inserted into a rectangular frame (frame), and a transparent cover is formed thereon to form an integral collector.

The operation principle is that solar heat heats the heat collecting plate, and the heated heat collecting plate transmits heat energy to heat medium such as water inside the branch pipe, and the heat medium heat-exchanged in the branch pipe is joined in the main pipe (header pipe) of the heat collector to collect heat in the heat storage tank or heat exchanger. To provide thermal energy.

In this case, the plate-type solar collector may be used by directly heating water, but in the region where the winter and the cold season exist, antifreeze may be used as the heat medium rather than water.

In addition, the vacuum tube solar collector has a glass tube shape and is formed to block heat loss due to convection by vacuuming a closed space in contact with the solar collector surface. The structure is divided into a method using one glass tube and a double vacuum tube using two glass tubes.

First, a method of using one glass tube inserts a heat pipe mounted with a heat pipe inside the glass tube, seals it with a metal stopper while protruding the heat pipe to the top of the glass tube, and vacuums the inside thereof. As a result, the solar heat collected from the heat collecting plate surface is prevented from being lost to the outside by convection.

In addition, the method of using two glass tubes in the form of a double vacuum tube forms a double tube in which the space between the outer tube and a special surface-treated collector tube is vacuum-treated for solar heat collection, and fills the water inside the collector tube, By sealing the upper portion of the heat insulating plug is formed to heat the water filled inside the heat collecting tube is a method of collecting solar energy. At this time, the space between the outer tube and the collecting tube to block the heat loss to the outside due to the convection of air due to the vacuum treatment.

Among the solar collectors, the flat collector is the most popular type due to low manufacturing cost. However, the structure of the flat plate collector is made of a thin metal plate, there is a problem due to the structure that is integrated between the heat collecting plate and the heat pipe to move the heat medium to absorb solar heat by ultrasonic welding.

6 is an exemplary view showing a state in which a heat collecting plate constituting a conventional flat solar collector is swelled by thermal expansion. In general, the length of the solar absorber plate (Solar absorber plate) is usually 2M or more and the maximum reaching temperature exceeds 200 ℃. Therefore, due to thermal expansion of the heat collecting plate processed by a thin metal plate at high temperature, the center portion rises in a semi-circular shape, which causes breakage of the branch pipe or severe transmission glass that forms the collector.

In addition, there is a structural problem that the convection heat loss increases because the distance to the transmission glass is closer.

In addition, when the bending occurs due to thermal expansion of the heat collecting plate, there is a problem that the ultrasonic welding portion coupled with the branch pipe may be damaged by the heat expansion and contraction of the heat collecting plate.

An object of the present invention for solving the above problems is to break the collector by preventing the bending deformation by holding the collector plate in the opposite direction of the bending direction when the heat collecting plate constituting the plate-type solar collector reaches a high temperature and the center portion swells The present invention provides a flat solar collector having a warpage prevention device.

In addition, another object of the present invention is to prevent the bending force generated by the thermal expansion of the heat collecting plate and at the same time to prevent the ultrasonic welding between the branch pipes to prevent breakage due to thermal expansion and contraction of the heat collecting plate divided the bending prevention device is formed It is to provide a flat solar collector provided.

The present invention, which achieves the object as described above and removes the drawbacks of the related art, has a main body installed on one side and the other side inside a rectangular collector frame, and a plurality of main bodies connected to supply heat exchanged heat medium to both main tubes. In the flat solar collector comprising a branch pipe and a heat collecting plate respectively coupled to each other through an ultrasonic welding portion formed by ultrasonic welding on the plurality of branch pipes to absorb solar heat.

A fixed angle positioned across the bottom of the plurality of branch pipes so as to intersect with the longitudinal direction of the branch pipes and fastened at a plurality of points with a heat collecting plate positioned at an upper portion thereof;

Square pipes for stay spring fitting coupled to one or both sides of the fixed angle;

Flat spring solar collector having a bending prevention device, characterized in that comprises; a stay spring inserted into one side or both sides of the square pipe to prevent the bending by providing the elastic force in the opposite direction when the heat collecting plate is thermally expanded and the bending phenomenon occurs. By providing.

According to an embodiment of the present invention, the stay spring has a '∧' type flat cross-sectional shape and has a length that is connected to both ends of the lower elastic support portion and a lower elastic support portion inserted into the square pipe and is larger than the diameter of the branch pipe. It may be configured to have a vertical elastic support portion formed to have, and an elastic frame support portion formed to be bent in the same direction as the longitudinal direction of the paper tube formed at the end of the vertical elastic support portion.

According to an embodiment of the present invention, the elastic frame support portion may be formed by inserting an insulating tube to prevent heat conduction when contacting the frame.

The present invention is a preferred embodiment, the fixing angle is fastened to the heat collecting plate by a rivet, the rivet can be configured to use at least a length corresponding to the diameter of the branch pipe.

In a preferred embodiment of the present invention, the fixing angle may be installed at one or more central portions of the branch pipe.

According to an embodiment of the present invention, the heat collecting plate coupled to the branch pipe by ultrasonic welding may be configured as a split type formed at a free end without forming a body with a neighboring heat collecting plate at both ends.

As described above, the present invention, when the heat collecting plate constituting the plate-type solar heat collector reaches a high temperature and the center portion swells, by holding the heat collecting plate in the opposite direction of the bending direction by the anti-warping device to prevent the bending deformation to prevent the damage of the branch pipe and the heat collecting plate It is possible to prevent the damage of the glass plate due to the bending of the tube and the branch to increase the durability of the collector,

In addition, the present invention is a useful invention that has the advantage of distributing the bending generating force due to thermal expansion by preventing the heat collecting plate from being broken by thermal expansion and contraction of the heat collecting plate by distributing the bending generation force due to thermal expansion. It is an invention which is expected to use greatly.

1 is a perspective view showing a bending prevention device of a heat collecting plate according to an embodiment of the present invention,
2 is a cross-sectional view showing a bending prevention device of the heat collecting plate according to an embodiment of the present invention,
Figure 3 is a perspective view showing a flat solar collector with a bending prevention device according to an embodiment of the present invention,
4 is an exemplary view showing a bending prevention operation according to the present invention,
5 is a cross-sectional view showing a bending prevention device of a split type heat collecting plate according to another embodiment of the present invention;
6 is an exemplary view showing a state in which a heat collecting plate constituting a conventional flat solar collector is swelled by thermal expansion.

Hereinafter, the configuration and the operation of the embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a perspective view showing a bending prevention device of the heat collecting plate according to an embodiment of the present invention, Figure 2 is a cross-sectional view showing a bending preventing device of a heat collecting plate according to an embodiment of the present invention, Figure 3 is A perspective view of a flat solar collector provided with a warpage prevention device according to an embodiment.

As shown, the solar collector according to the present invention has a main pipe (Header pipe, 2) which is installed on one side and the other inside of the rectangular collector frame 1 forming a solar collector like a general flat plate collector, and the main body on both sides. It consists of a plurality of branch pipes (Branch pipe, 3) to connect, and a heat collecting plate (6) that is respectively coupled through the ultrasonic welding portion (5) formed by ultrasonic welding on the plurality of branch pipes to absorb solar heat.

The main pipe 2 is connected to the heat storage tank and the like through the frame (1). The heat storage tank is connected to a plurality of unit collectors through heat exchange to supply hot water or a heating medium. Since the hot water and heating supply configuration using such solar heat is a common one, a detailed description thereof will be omitted.

The branch pipe (3) is usually made of copper or aluminum material with high thermal conductivity, and is configured to have a small diameter so that the heat conducted from the heat collecting plate 6 can quickly heat up the heat medium flowing therein. The diameter of the branch pipe is freely changed according to design, and the specific value of the branch pipe is not limited in the present invention.

In addition, the heat collecting plate 6 is a thin metal plate made of copper, aluminum, or the like, which is a heat collecting plate made of a coating with a special chemical treatment on its surface to absorb the sun's rays as much as possible. As a coating material, a coating material including titanium is commonly used, and the present invention is not limited to the coating material containing titanium among these coating materials. If the coating material absorbs a lot of sunlight and absorbs a lot of infrared rays, a commercially available one is used. You may also

Hereinafter, an apparatus for preventing warpage due to thermal expansion of the heat collecting plate according to the present invention will be described.

The present invention is a 'b' shape of the shape that is located so as to intersect the longitudinal direction of the branch pipe in the lower direction of the branch pipe 3 welded to the heat collecting plate 4 with the ultrasonic welding portion 5 therebetween in order to prevent the bending of the heat collecting plate. The fixed angle 6 is installed across a plurality of branch pipes.

At this time, the fixing angle 6 is fastened at a plurality of points with the heat collecting plate 4 located at the upper portion by using a rivet 7 having a length corresponding to at least the diameter of the branch pipe 3. As such, the fixing angle 6 is fastened by using the rivet 7 having a length so that the bending angle of the fixing angle 6 across the plurality of branch pipes 3 is transmitted when the bending phenomenon of the heat collecting plate 4 occurs.

The fixed angle 6 is installed in the number of one or more on the basis of the longitudinal direction of the branch pipe, the installation position is preferably installed at the central point of the branch pipe (3). The reason for this is that the maximum occurrence of bending due to thermal expansion occurs at the center of the heat collecting plate. In addition, even if only one is installed can be enough to prevent the role of bending, it is more preferable to install a plurality of not only to reduce the size of the unit fixing angle, but also to play a more powerful bending prevention role.

In addition, the fixed angle is configured in a 'b' shape according to an embodiment, but may be a polygon or circular type such as a square. However, in the present invention, the reason for the 'A' shape is that it is enough to be fixed with the heat collecting plate, so as to remove the excessive load by the unnecessary members. If the fixed angle with too much load is installed, the weight of the overall collector becomes heavy, which increases the load applied to the building where the collector is installed, and also increases the overall manufacturing cost. At this time, the material of the fixed angle is sufficient metal, but preferably made of aluminum in terms of weight, strength and thermal conductivity.

When the fixed angle is installed, the stay spring fitting square pipe 8 into which a stay spring is inserted to provide an elastic force to the fixed angle at one surface bent toward the lower side of the fixed angle to prevent expansion of the heat collecting plate is provided. Is installed. The installation method of the square pipe 8 is sufficient to use a conventional fastening method such as welding fastening or bolt nut fastening. In addition, the length of the square pipe is enough if one side of the stay spring is inserted so that the length does not fall out. The number of installation of the square pipe 8 may be installed one each on both sides per fixed angle (6). Of course, only one installation can work, but it is preferable to install on both sides. At this time, the material of the square pipe is sufficient metal, but preferably made of aluminum in terms of weight, strength and thermal conductivity.

Stay spring (9) inserted into the square pipe (8) is one side is inserted into the square pipe and is in contact with the lower surface, the other side is upper portion on the lower surface of the jaw 101 protruding into the inside of the frame Is contacted and elastically supported.

When explaining a specific shape according to an embodiment, the side structure is formed to have a 'b' cross-section, the lower elastic support portion 91 is inserted into one side of the square pipe has a '단' shape flat cross-section structure, the square portion of the square pipe Is inserted into.

In addition, the vertical elastic support portion 92 connected to both ends of the lower elastic support portion is formed to have a length greater than the diameter of the branch pipe, the elastic frame support portion 93 formed at the end of the vertical elastic support portion 92 is a support force when supporting the jaw of the frame It is formed to be bent in the same direction as the longitudinal direction of the branch to increase the. Of course, it does not matter if the bent direction is formed in the direction intersecting the branch pipe. Since the length of the elastic frame support is long, interference may occur, so it is preferably formed in the same direction as the branch pipe so as to be concealed on the protruding lower surface of the frame.

Stay spring (9) having such a shape is heated to a high temperature on the heat collecting plate that is being collected due to solar heat, and when bending due to thermal expansion occurs to the fixed angle 6 through the rivet, at least one end of the fixed angle The springs that were supporting the formed square pipes 8 are operated to provide elastic force in a direction opposite to the bending direction of the heat collecting plate.

Therefore, stay spring (Stay Spring) should be made of a material with a greater elastic force than the heat collecting plate. Of course, if the metal is structurally enough to act as a spring.

In addition, the elastic frame support 93 is fitted with an insulating tube 10 to prevent heat conduction when in contact with the frame (1). As long as the material of the insulating tube is a material that prevents heat conduction, any of commercially available thermoelectric materials may be used. For example, a silicon tube containing an inorganic (ceramic) component may be used.

Figure 4 is an exemplary view showing a splash prevention operation according to the present invention, the stay spring (stay spring) having a greater elastic force than the bending force of the heat collecting plate when the heat collecting plate made of thin metal material heated by solar heat as shown in the upward direction Spring, 9) pushes the square pipe (8) in the opposite direction of the bending direction, the elastic force is applied to the entire fixed angle with the square pipe, so that the fixed angle is ultrasonically welded to the entire heat collecting plate, that is, a plurality of branch pipes By providing an elastic force to the heat collecting plate is forced to prevent thermal expansion of the heat collecting plate having a bending force weaker than the elastic force of the spring. Therefore, it is possible to prevent the damage of the branch pipe and the collector due to thermal expansion. In addition, the distance from the glass plate on the upper surface is kept constant to prevent the loss of convection phenomena that may occur when bending occurs.

5 is a cross-sectional view showing a bending prevention device of a split type heat collecting plate according to another embodiment of the present invention, the configuration of which is the same as in FIGS. The only difference is that the heat collecting plate 4 is formed in a divided form, and each divided heat collecting plate is configured by ultrasonic welding with a branch pipe, respectively. The reason for forming the split type is that both ends of the divided heat collecting plate are not formed with the adjacent divided heat collecting plate and one body, and are formed as free ends, thereby distributing the bending generation force due to thermal expansion than when the single heat collecting plate is configured. At the same time, the ultrasonic welding portion between the branch pipes is prevented from being damaged by thermal expansion and contraction of the heat collecting plate. Of course, the rivet is formed in the contact portion with the neighboring split heat collecting plate, but the rivet forming part is one point, and there is also a self-gap of the rivet forming part is sufficient as a free end.

In addition, the split type configuration does not require repairing the entire heat collecting plate and the branch pipe as in the prior art, since only the heat collecting plate and the branch pipe of the corresponding part need to be repaired when the heat collecting plate or branch pipe is repaired later.

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.

<Explanation of symbols for the main parts of the drawings>
(1): frame (2): main building
(3): branch pipe (4): heat collecting plate
(5): Ultrasonic welding part (6): Fixed angle
(7): rivet (8): square pipe
(9): Stay spring (10): Insulation tube
(91): lower elastic support portion 92: vertical elastic support portion
(93): elastic frame support 101: jaw

Claims (6)

The main pipe 2 installed on one side and the other inside of the rectangular collector frame 1, a plurality of branch pipes 3 connected to supply heat exchanged heat medium to both main pipes, and ultrasonic welding on the plurality of branch pipes. In the flat solar collector, which is composed of a heat collecting plate 6 which is respectively coupled through the formed ultrasonic welding part 5 to absorb solar heat,
A fixed angle 6 positioned across the longitudinal direction of the branch pipe in the lower direction of the plurality of branch pipes 3 and fastened at a plurality of points with a heat collecting plate 4 positioned at an upper portion thereof;
Stay pipe fitting square pipe (8) coupled to one side or both sides of the fixed angle;
A stay spring (9) inserted into one side or both sides of the square pipe (8) to prevent the bending by providing elastic force in the opposite direction when the heat collecting plate is thermally expanded to cause the bending phenomenon;
The stay spring 9 has a '∧' type flat cross-sectional shape and is formed to have a length greater than the diameter of the branch pipe connected to both ends of the lower elastic support portion 91 and the lower elastic support portion inserted into the square pipe. Plate-type solar heat with a bending preventing device, characterized in that consisting of a vertical elastic support portion 92, and an elastic frame support portion 93 formed to be bent in the same direction as the longitudinal direction of the branch pipe formed at the end of the vertical elastic support portion 92 Collector.
delete The method according to claim 1,
The elastic frame support (93) is a flat solar collector having a bending prevention device, characterized in that the insulating tube 10 is inserted to prevent the heat conduction when the frame (1) is inserted.
The method according to claim 1,
The fixed angle (6) is fastened to the heat collecting plate by the rivet (7), the rivet is a flat solar collector with a bending prevention device, characterized in that having a length corresponding to at least the diameter of the branch pipe (3). .
The method according to claim 1,
The fixed angle (6) is a flat solar collector with a bending preventing device, characterized in that one or more installed in the center of the branch pipe.
The method according to claim 1,
The heat collecting plate coupled by ultrasonic welding with the branch pipe is a flat panel solar collector having a bending preventing device, characterized in that the both ends are formed of a split type formed of a free end instead of one body with a neighboring heat collecting plate.

Images