WO2009089675A1

WO2009089675A1 - Heat collecting-exchanging member and solar collecting plate and solar collector

Info

Publication number: WO2009089675A1
Application number: PCT/CN2008/001879
Authority: WO
Inventors: Qun Hua
Original assignee: Qun Hua
Priority date: 2008-01-18
Filing date: 2008-11-14
Publication date: 2009-07-23
Also published as: CN101487633B; CN101487633A

Abstract

A heat collecting-exchanging member includes a pair of plate-shaped components (7, 9) arranged in opposed relation to each other and a hermetically-fixing structure (10, 11, 12) which hermetically fixes the pair of plate-shaped components (7, 9) together, wherein at least one of the pair of plate-shaped components (7, 9) is provided with grooves and at least one of the pair of plate-shaped components (7, 9) is made of heat transferring material. With the pair of plate-shaped components (7, 9) bonded together by the hermetically-fixing structure (10, 11, 12), the grooves can form hermetic spaces, the hermetic spaces are provided with at leastan inlet and at least an outlet. Furthermore, a solar collecting plate with the heat collecting-exchanging member and a solar collector with the solar collecting plate are disclosed.

Description

Heat collecting heat transfer member, solar collector plate and solar collector

The invention relates to a heat collecting and heat exchange member, a solar energy collecting plate and a solar collector. . Background technique

At present, with the development of solar energy utilization technology, solar water heaters that are heated by solar collectors are increasingly used. For solar collectors, the heat collecting members are important components that determine their quality.

Most of the heat collecting members of the current collectors of flat-panel solar water heaters are copper tube fin-type heat collecting systems under flat glass. As shown in Fig. 1, the heat collecting member mainly comprises a heat collecting plate 1, a heat collecting copper tube, a heat exchange hot water rising pipe 3, a water tank 4, a water temperature water level controller 5, and a heat exchange cold water falling pipe 6.

However, the disadvantages of the existing heat collecting members are: a) not antifreeze, since the copper plate is used in the heat collecting plate, if it is used in an area where the temperature is lower than 0 degrees, the water freezing causes the copper tube to swell. Cracking; b) low heat collecting efficiency, there is a certain gap between the copper tubes. These gaps make the distance between the copper tube and the solar heat-absorbing fins to increase the heat transfer to the copper tube, resulting in lowering of the heat collecting efficiency and the copper tube. Scale, the length of time will increase the thermal resistance to affect the heat collection efficiency; c) the production cost is higher.

In the Chinese Utility Model Patent Publication No. CN2754021Y, such a solar collector is proposed, which comprises a male outer layer made of a transparent heat insulating material and a female outer layer made of a heat insulating material. A heat collecting member of the package, the heat collecting member being composed of a heat conductive material and a material sandwiched between the materials having a certain tensile strength. However, the heat collecting member of the solar collector of the above utility model is deformed into a round tubular shape after the high-pressure medium is injected into the intermediately wrapped hose, thereby relatively increasing the heat capacity of the heat collector and reducing the ratio thereof. Surface area, which makes it less efficient, and also affects the collector's view

For the existing flat heat exchangers, the metal materials are basically used. This is because the metal materials have fast heat conduction and are easy to manufacture, but ordinary metal materials tend to react easily with the heat exchange medium, causing corrosion and exchange of materials. In the case of internal scaling of the heat exchanger, it must be made of special stainless steel or precious metals such as gold or silver, which increases the material cost, and does not completely solve the scaling problem. It needs to be cleaned and descaled regularly, and when water As a heat exchange medium, especially in the heat exchangers of chemical production, seawater desalination, sewage treatment and groundwater heat exchange, the problems of hot water fouling plugging pipelines and ice water icing expansion and cracking pipelines are also straight. Can't be solved very well.

SUMMARY OF THE INVENTION - In order to overcome the above-mentioned deficiencies of the prior art, an aspect of the present invention provides a heat collecting heat exchange member, wherein the heat collecting heat exchange member includes a pair of plate members disposed oppositely and a fixed sealing structure in which a pair of plate-like members are fixedly sealed, wherein at least one of the pair of plate-like members is formed with a recess, and at least one of the pair of plate-like members is composed of a heat conductive material, when the pair of plate-like members pass through When the fixed sealing structure is attached together, the recess constitutes a closed space, and the sealed space is provided with at least one inlet and at least one outlet.

A heat collecting and heat exchange member according to an embodiment of the present invention, wherein the fixed sealing structure is fixed by at least one of elastic clamping, clamping, riveting, splicing, stitching, bonding, and crimping. This pair of plate members. A heat collecting and heat exchange member according to another embodiment of the present invention, wherein the fixed sealing structure employs a film material attached to an opposite inner surface of the pair of plate members, and the sealing is completely wrapped by the film material Space to seal the pair of plate members.

A heat collecting and heat exchange member according to an X embodiment of the present invention, wherein the Ninghui material is made of a flexible material that is less susceptible to scaling and corrosion.

A heat collecting and heat exchange member according to still another embodiment of the present invention, wherein the heat conductive material is a metal material.

A heat collecting and heat exchange member according to still another embodiment of the present invention, wherein at least the other of the pair of plate members is composed of a hard plate material having a bending strength.

A heat collecting and heat exchange member according to still another embodiment of the present invention, wherein the inner layer of the hard plate material is superposed with a layer of elastic material.

A heat collecting and heat exchange member according to still another embodiment of the present invention, wherein the elastic material is plastic or rubber. - Another aspect of the present invention is to provide a solar energy collecting plate, wherein the solar heat collecting plate comprises the heat collecting and heat exchange member of the present invention, and a pair of plates in the heat collecting and heat exchange member The outer surface of the component's thermally conductive material is coated with a solar selective absorbing coating. .

Still another aspect of the present invention provides a solar heat collector in which the solar heat collector of the present invention is mounted.

The heat collecting and heat exchange member of the invention can be used not only for heat collecting but also for heat exchange, and has the advantages of antifreeze, heat collecting and heat transfer efficiency, difficulty in scaling, corrosion resistance, simple process and low cost. . Moreover, the solar heat collecting plate and the solar heat collector according to the present invention not only improve the heat collecting efficiency but also reduce the production cost. DRAWINGS

The present invention is further described below in conjunction with the accompanying drawings and embodiments:

Figure 1 is a schematic view of a conventional solar collector;

Figure 2 is a cross-sectional view of a heat collecting heat exchange member according to the present invention;

Figure 3 is a plan view of a heat collecting heat exchange member according to the present invention;

Fig. 4 is a schematic view of a solar heat collector having a solar heat collecting plate according to the present invention.

Best embodiment

The heat collecting heat exchange member of the present invention includes a pair of plate-like members disposed oppositely and a fixed sealing structure for fixedly sealing the pair of plate-like members, wherein at least one of the pair of plate-like members is formed with a concave portion while the pair At least one of the plate-like members is constructed of a thermally conductive material that forms a closed space when the pair of plate-like members are brought together by the fixed sealing structure, the confined space being provided with at least one inlet and at least one outlet.

- at least one of the pair of plate members is composed of a heat conductive material and the other is composed of a hard plate material having a certain bending strength. The plate-shaped member composed of a heat conductive material is mainly used as a heat collecting heat exchange surface of the heat collecting heat exchange member. In order to improve the heat collecting heat transfer efficiency and also to reduce the amount of metal material used, the heat conductive material is preferably a metal thin plate, and The metal sheet is pre-warmed or pressed to form a flat concave portion; when used for a solar heat collecting plate, a solar selective absorbing coating is applied on the outer surface of the plate member to maximize absorption of solar energy. .

Since at least one of the plate-like members is composed of a hard plate material having a bending strength, it has sufficient bending strength to withstand the pressure of the heat exchange medium entering and leaving the sealed space. Strong, thereby preventing the pair of plate-like members from being over-expanded due to the injection of the high-pressure medium, so that the sealed space becomes thick, for example, from a flat shape to a distinct elliptical shape. Thereby, the volume of the sealed space is minimized, the specific surface area of the heat exchange medium therein is effectively increased, and the heat collecting heat transfer efficiency is improved.

a film material is also attached to the opposite inner surfaces of the pair of plate-like members, wherein the pair of plate-like members are elastically clamped, clamped, riveted, welded, stitched, bonded, crimped After at least one of the heat exchange media having a certain pressure is pressed into the recess between the two plates, since the recess is completely wrapped by the film material, the recess constitutes an inlet and outlet. hermetic space.

When the heat exchange medium flowing in the sealed space of the heat collecting and heat exchange member is water, it is preferable that the pair of plate members are fixed by elastic clamping, and the effect is as follows: For the plate member, there is also room for expansion and contraction, and when the water as the heat exchange medium is expanded by ice, the heat collecting heat transfer structure can be effectively prevented from being cracked. In addition, when an elastic material is further added between the pair of plate-like members, for example, an elastic material such as a plastic plate or a rubber plate is further laminated on the inner layer of the hard plate material, the heat collecting heat transfer can also be performed. The confined space between the components can have elastic expansion and contraction.

Furthermore, the confined space is wrapped by a film material. The film material is at least one of a film bag, a thin-walled hose, and an inner wall coating of a plate-like member. In addition, the film material is made of a flexible material such as plastic or rubber. Since the film material is less prone to scale and corrosion, it encloses a confined space, and the heat exchange medium flows in the confined space, so its range of motion The direction and direction are effectively restrained, completely preventing the heat exchange medium from corroding the metal material constituting the plate member. The above-mentioned wrapping of the sealed space by the film material can be achieved by: 1. coating the opposite inner surfaces of the pair of plate-like members, and then opening the inlet and outlet of the heat exchange medium; The hose is clamped between the pair of plate-like members, and the openings at both ends of the hose are respectively the inlet and outlet of the heat exchange medium; 3. The film bag is clamped between the pair of plate members, and then the heat exchange medium is opened. Export. In addition, since the closed space formed by the latter two methods is non-rigid and has a certain degree of flexibility, it has a preventive effect on the problem that water icing expansion may swell the confined space.

2 and 3 are a cross-sectional view and a plan view, respectively, of a heat collecting and heat exchange member according to the present invention.

' ^: As shown in Fig. 2, the heat collecting heat exchange member of the present invention comprises a pair of plate-like members 7 and 9 disposed opposite each other, wherein the plate-like member 7 is made of a thin metal plate with flat grooves The plate member 9 is made of a hard plate having bending strength. The flat groove is located between the pair of plate members when the pair of plate members are disposed opposite to each other.

First, the pair of plate-like members 7 and 9 are connected by elastic clamping, and the manner of elastic clamping includes a spring washer 10, a clamping nut 11 and a multi-leg clamping link 12, by way of The pair of plate-like members 7 and 9 are fixed together, and it is ensured that the spacing between the plate-like members 7 and 9 can have a range of elastic movement, preventing thermal expansion and contraction of the heat exchange medium from damaging the heat-collecting heat-exchange member.

Next, a film material is attached to the opposite inner surfaces of the plate members 7 and 9, the film material completely encasing the flat grooves, thereby forming an inlet and an outlet between the pair of plate members Confined space. In the present embodiment, the enclosed space is a film hose 8 with an inlet and an outlet. As shown in FIG. 3, a plurality of film hoses 8 disposed between the plate-like members 7 and 9 of the heat-collecting heat-exchange member are connected, and an inlet of the film hose is connected to the inlet pipe 13 of the heat exchange medium. The outlet of the film hose is connected to the discharge pipe 14 of the heat exchange medium, so that the heat exchange medium can flow only in the film hose 8, the inlet pipe 13 of the heat exchange medium, and the discharge pipe 14 of the heat exchange medium, ensuring the entire set. The heat exchange member is less susceptible to fouling and corrosion resistance. In addition, it will be appreciated that the inlet tube 13 and the discharge tube 14 are formed of a material that is less susceptible to scale and corrosion, such as plastic.

The solar heat collecting plate of the present invention is formed by coating a surface of a heat conductive material of a pair of plate-like members of the heat collecting and heat exchange member with a solar selective absorbing coating.

Fig. 4 is a schematic view of a solar heat collector mounted with a solar heat collecting plate according to the present invention.

As shown in FIG. 4, the solar thermal collector of the present invention is configured as follows: a solar selective absorbing coating is applied to the outer surface of the heat conductive material of the pair of plate-shaped members of the heat collecting and heat exchange member in advance, thereby Forming a solar heat collecting plate, then connecting the inlet pipe 13 in the heat collecting heat exchange member of the solar heat collecting plate with the water inlet 17, connecting the discharge pipe 14 with the water outlet 18, and then installing the solar heat collecting plate into the bottom as a whole And the aluminum alloy frame 16 which is filled with the heat insulating material around, and then the transparent glass 15 is covered on the aluminum alloy frame 16, thus constituting the solar heat collector of the present invention.

While the invention has been described in detail with reference to the drawings and embodiments, it is understood that The present invention may be modified and changed as needed by those skilled in the art without departing from the spirit and scope of the invention, and such modifications and variations are within the scope of the invention. Industrial applicability

Most of the existing solar collectors use hard tube heat collecting components, which are high in cost and low in efficiency. When the temperature drops below zero, they will burst due to water icing expansion, resulting in maintenance costs. It is also relatively high, and the existing flexible tube heat collecting component will be deformed into a round tubular shape after being injected into the high-pressure medium, thereby relatively increasing the heat capacity of the heat collector, reducing the specific surface area thereof, and making the heat collecting efficiency low. , also affects the appearance of the collector. The object of the present invention is to solve the above problems. In the present invention, a pair of plate-like members are stacked to form a closed space to replace the existing rigid tube heat collecting member, which can be used not only for heat collecting but also for heat exchange, and has antifreeze and heat collecting. The utility model has the advantages of high thermal efficiency, no scaling, corrosion resistance, simple process and low cost. Further, the solar heat collecting plate and the solar heat collector according to the present invention not only improve the heat collecting efficiency but also reduce the production cost. The product of the present invention has been produced, so the present invention is applied to actual industrial production.

Claims

Rights request

A heat collecting and heat exchange member, comprising: a pair of plate-like members disposed oppositely and a fixed sealing structure for fixedly sealing the pair of plate-like members, wherein the pair At least one of the plate-like members is formed with a recess, and at least one of the pair of plate-like members is composed of a heat conductive material, and when the pair of plate-like members are attached together by the fixed sealing structure, the recess constitutes a closed space. The confined space is provided with at least one inlet and at least one outlet.

The heat collecting and heat exchange member according to claim 1, wherein the fixed sealing structure adopts at least one of elastic clamping, clamping, riveting, splicing, stitching, bonding, and crimping. The pair of plate members are fixed.

The heat collecting and heat exchange member according to claim 1, wherein the fixed sealing structure employs a film material attached to an opposite inner surface of the pair of plate members, and the film material is completely The sealed space is wrapped to seal the pair of plate members.

The heat collecting and heat exchange member according to claim 3, wherein the film material is made of a flexible material that is less susceptible to scaling and corrosion.

The heat collecting and heat exchange member according to claim 1, wherein the heat conductive material is a metal material.

The heat collecting and heat exchange member according to claim 1, wherein at least one of the pair of plate members is made of a hard plate material having a bending strength.

The heat collecting and heat exchange member according to claim 6, wherein the inner layer of the hard plate material is superposed with a layer of elastic material.

The heat collecting and heat exchange member according to claim 7, wherein the elastic material is plastic or rubber.

A solar heat collecting plate, comprising: the heat collecting and heat exchange member according to any one of claims 1 to 8, a pair of plates of the heat collecting and heat exchange member The outer surface of the thermally conductive material of the member is coated with a solar selective absorbing coating.

A solar collector, characterized in that the solar collector is equipped with the solar collector plate according to claim 9.