Solar collector panel core and collector

Abstract

This application discloses a solar collector core and a solar collector. The collector core includes a heat-collecting substrate, a heat transfer clamping plate, and a medium flow tube. A heat-collecting blue film is provided on the upper surface of the heat-collecting substrate, and a substrate tube groove is provided on the lower surface of the heat-collecting substrate. A clamping plate groove is provided on the upper surface of the heat transfer clamping plate. The heat-collecting substrate and the heat transfer clamping plate are connected, and a medium flow tube is fitted between the substrate tube groove and the clamping plate groove. The solar collector includes a heat-collecting insulation box and a transparent glass plate, and also includes the aforementioned solar collector core, with the heat-collecting blue film facing the transparent glass plate. The beneficial effects of this application are: increasing the heat-receiving area of ​​the medium flow tube, enabling effective transfer of heat from the heat-collecting substrate to the medium within the flow tube, thus improving the heat collection effect; optimizing the manufacturing process, reducing the overall cost, and improving the product's market competitiveness; the heat-collecting blue film coated on the heat-collecting substrate has an extremely high absorption rate for solar radiation energy, effectively improving the solar thermal conversion efficiency.

Description

Technical Field

[0001] This application belongs to the field of solar thermal technology, specifically relating to a solar thermal collector core and a collector. Background Technology

[0002] The rising cost of petrochemical energy has spurred the development of solar thermal energy utilization, particularly flat-plate solar thermal collector systems, which are becoming increasingly popular. As is well known, flat-plate solar collectors offer significantly improved heat collection performance compared to existing glass tube solar collectors, and also demonstrate numerous advantages when integrated with buildings.

[0003] Currently, the most widely used flat-plate solar collectors both domestically and internationally are copper-aluminum composite cores, which involve welding copper or aluminum channels onto copper or aluminum metal plates. This type of structure has a high material cost, and the direct welding between the channels and the metal plates results in a small heat transfer contact area, leading to a high overall cost and poor heat collection performance for the collector. Utility Model Content

[0004] The purpose of this application is to provide a solar collector core and collector that solves the problems of high cost and poor heat collection effect of existing collectors.

[0005] The objective of this application is achieved through the following technical solution:

[0006] A solar collector core includes a heat collection substrate, a heat transfer clamp, and a medium flow tube. The upper surface of the heat collection substrate is provided with a heat collection blue film, and the lower surface of the heat collection substrate is provided with a substrate tube groove. The upper surface of the heat transfer clamp is provided with a clamp tube groove. The heat collection substrate is connected to the heat transfer clamp, and a medium flow tube is matched and clamped between the substrate tube groove and the clamp tube groove.

[0007] Furthermore, the heat collection substrate and heat transfer clamp are made of aluminum alloy, and the medium flow tube is made of stainless steel.

[0008] Furthermore, the heat collection substrate, excluding the substrate tube groove, has a flat plate structure, and the heat transfer clamp, excluding the clamp tube groove, has a flat plate structure.

[0009] Furthermore, the heat collection substrate and the heat transfer clamp are integral die-cast structures.

[0010] Furthermore, the heat collection substrate and the heat transfer clamp are connected by laser welding points.

[0011] Furthermore, the laser welding points are located on both sides of the medium flow tube and are arranged at equal intervals along the direction of the flow tube.

[0012] Furthermore, the substrate tube groove is an arc-shaped groove that matches the medium flow tube, the clamping plate tube groove is a V-shaped groove, and the bottom of the clamping plate tube groove is an arc-shaped groove bottom that matches the medium flow tube.

[0013] Furthermore, the heat collection substrate is provided with a plurality of substrate tube grooves, which are arranged at equal intervals. The heat transfer clamp is provided with a plurality of pieces equal in number to the substrate tube grooves. The clamp tube grooves are located in the middle of the heat transfer clamp. The medium flow pipe is provided with a plurality of tubes equal in number to the substrate tube grooves.

[0014] A solar collector includes a heat collection and insulation box and a transparent glass plate, and also includes the aforementioned solar collector core, with a heat collection blue film facing the transparent glass plate.

[0015] Furthermore, it also includes a medium inlet pipe and a medium outlet pipe inside the heat collection and insulation box. One end of the medium inlet pipe is connected to the medium flow pipe, and the other end of the medium outlet pipe is connected to the medium flow pipe. Both the medium inlet pipe and the medium outlet pipe are equipped with pipe joints that extend out of the heat collection and insulation box.

[0016] The beneficial effects of this application are:

[0017] (1) A sandwich structure is adopted in which the heat collection substrate and the heat transfer clamp are used to hold and fix the medium flow tube. Through the heat transfer transition effect of the heat transfer clamp, the heat-receiving area of ​​the medium flow tube is increased, and the heat of the heat collection substrate can be effectively transferred to the medium in the flow tube, thereby improving the heat collection effect.

[0018] (2) The heat collection substrate, heat transfer clamp and medium flow channel are made of low-cost aluminum alloy or stainless steel. The sandwich structure ensures good heat transfer effect and structural strength, while optimizing the processing and manufacturing method, reducing the overall cost and improving the market competitiveness of the product.

[0019] (3) A heat-collecting blue film is coated on the heat-collecting substrate. The heat-collecting blue film is deposited on the metal substrate using physical vapor deposition technology and vacuum magnetron sputtering method. It has an extremely high absorption rate of solar radiation energy and its own emissivity is very low, which can effectively improve the solar thermal conversion efficiency.

[0020] The aforementioned main solution and its various further alternatives can be freely combined to form multiple solutions, all of which are solutions that can be adopted and are claimed in this application; furthermore, the (non-conflicting alternatives) can also be freely combined with each other and with other alternatives. Those skilled in the art, after understanding this solution, will realize from the prior art and common general knowledge that there are many combinations, all of which are technical solutions to be protected in this application, and will not be exhaustively listed here. Attached Figure Description

[0021] Figure 1 This is a partial structural assembly drawing of the heat collector core of this application.

[0022] Figure 2This is a partial structural breakdown diagram of the heat collector core of this application.

[0023] Figure 3 This is a schematic diagram of the overall structure of the heat collection plate core in this application.

[0024] Figure 4 This is a schematic diagram of the back structure of the solar collector substrate of this application.

[0025] Figure 5 This is a schematic diagram of the side structure of the solar collector substrate of this application.

[0026] Figure 6 This is a schematic diagram of the overall structure of the solar collector in this application.

[0027] In the figure: 1-Heat collector substrate, 2-Heat collector blue film, 3-Heat transfer clamp, 4-Medium flow pipe, 5-Laser welding point, 6-Substrate tube groove, 7-Clamping plate tube groove; 10-Heat collector insulation box, 20-Transparent glass plate, 30-Medium inlet pipe, 40-Medium outlet pipe, 50-Pipe connector. Detailed Implementation

[0028] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0029] Example 1

[0030] refer to Figures 1-3 As shown, a solar collector core includes a collector substrate 1, a heat-collecting blue film 2, a heat transfer clamp 3, a medium flow tube 4, and a laser welding point 5.

[0031] The heat collection substrate 1 is made of aluminum alloy with a thickness of 0.2–0.3 mm and a length of (2–4 m) * (0.5–2 m), exhibiting good thermal conductivity and structural strength. A substrate tube groove 6 is provided on the lower surface of the heat collection substrate 1, which is used for the matching and placement of the upper part of the medium flow pipe 4. Excluding the substrate tube groove 6, the heat collection substrate 1 has a flat plate structure, ensuring that it has a large sun-facing heat collection surface. The heat collection substrate 1 is a one-piece die-cast structure, which is convenient to process and manufacture, and has high overall strength.

[0032] The upper surface of the heat collection substrate 1 is provided with a heat collection blue film 2. The heat collection blue film is a solar selective absorption vacuum coating. It is deposited on the metal substrate using physical vapor deposition technology and vacuum magnetron sputtering method. It belongs to the new generation of solar energy utilization technology. It has an extremely high absorption rate of solar radiation energy and its own emissivity is very low, which can effectively improve the solar thermal conversion efficiency.

[0033] The heat transfer clamp 3 is made of aluminum alloy with a thickness of 0.3–0.5 mm and dimensions of (1.5–3.5 m) * (30–40 mm). It possesses good thermal conductivity and structural strength. The upper surface of the heat transfer clamp 3 is provided with clamping tube grooves 7, which are used for the matching and placement of the lower part of the medium flow pipe 4. The heat transfer clamp 3, excluding the clamping tube grooves 7, has a flat plate structure, enabling a close fit with the heat collection substrate 1 to increase the heat transfer path. The heat transfer clamp 3 is an integral die-cast structure, which is convenient to manufacture and has high overall strength.

[0034] The heat collection substrate 1 is bonded to the heat transfer clamp 3, and the medium flow pipe 4 is matched and clamped between the substrate groove 6 and the clamp groove 7. The heat of the heat collection substrate 1 can be directly transferred to the medium flow pipe 4. At the same time, the heat of the heat collection substrate 1 can also be transferred to the medium flow pipe 4 through the transition of the heat transfer clamp 3, thereby increasing the heat-receiving surface of the medium flow pipe 4 and ensuring that the heat on the heat collection substrate 1 is quickly and effectively transferred to the medium.

[0035] The medium flow tube 4 is made of stainless steel with a diameter of 6-10mm, resulting in lower cost while ensuring good thermal conductivity and structural strength. A low-temperature medium flows through the medium flow tube 4, absorbing heat from the heat collection substrate 1 during its flow and then dissipating. The low-temperature medium can be cold oil or cold water, or other cool liquids. Under special operating conditions, cold air can also be introduced, and the medium discharge temperature can reach 55-85℃.

[0036] The heat-collecting substrate 1 is provided with a plurality of substrate tube grooves 6 (seven in this embodiment), which are arranged at equal intervals. The heat transfer clamping plate 3 is provided with a plurality of blocks (seven blocks in total) equal to the number of substrate tube grooves 6. The clamping plate groove 7 is located in the middle of the heat transfer clamping plate 3. The medium flow pipe 4 is provided with a plurality of tubes (seven tubes in total) equal to the number of substrate tube grooves 6. Thus, multiple heat transfer clamping plates 3 are used in conjunction with one heat-collecting substrate 1 to realize the arrangement of multiple medium flow pipes 4. The multiple medium flow pipes 4 absorb the heat on the entire heat-collecting substrate 1, ensuring uniform and sufficient heating.

[0037] The substrate groove 6 is an arc-shaped groove that matches the dielectric flow tube 4, achieving a close fit between the substrate groove 6 and the upper part of the dielectric flow tube 4. The clamping plate groove 7 is a V-shaped groove, and the bottom of the clamping plate groove 7 is an arc-shaped groove bottom that matches the dielectric flow tube 4, achieving a close fit between the clamping plate groove 7 and the lower part of the dielectric flow tube 4.

[0038] The depth of the substrate tube groove 6 is less than the radius of the flow tube, while the depth of the clamping plate tube groove 7 is greater than the radius of the flow tube. That is, the clamping plate tube groove 7 accommodates most of the flow tube, while the substrate tube groove 6 accommodates a small part of the flow tube, thereby reducing the die-casting difficulty of the heat collection substrate 1. At the same time, the clamping plate tube groove 7 is a V-shaped groove, which optimizes the corner structure of the groove plate and also reduces the die-casting difficulty of the heat transfer clamping plate 3.

[0039] The heat collection substrate 1 and the heat transfer clamp 3 are connected by laser welding points 5. The laser welding points 5 are located on both sides of the medium flow tube 4 and are arranged at equal intervals along the flow tube direction to realize the fixed connection between the heat collection substrate 1 and the heat transfer clamp 3, thereby ensuring that the medium flow tube 4 is attached and fixed between the two.

[0040] Example 2

[0041] refer to Figures 1-6 As shown, a solar collector includes a heat-collecting and heat-insulating box 10 and a transparent glass plate 20, with the transparent glass plate 20 located on the sun-facing side of the heat-collecting and heat-insulating box 10. It also includes the solar collector core of Embodiment 1, with a heat-collecting blue film 2 facing the transparent glass plate 20. Sunlight passes through the transparent glass plate 20 and irradiates the heat-collecting blue film 2, which absorbs the heat energy from the sunlight and gradually heats the medium through the heat-collecting substrate 1, the heat transfer clamping plate 3, and the medium flow pipe 4.

[0042] It also includes a medium inlet pipe 30 and a medium outlet pipe 40 inside the heat collection and insulation box 10. One medium inlet pipe 30 and one medium outlet pipe 40 are respectively located on both sides of the heat collection and insulation box 10. The medium inlet pipe 30 is welded to one end of the medium flow pipe 4, and the medium outlet pipe 40 is welded to the other end of the medium flow pipe 4. The low-temperature medium enters through the medium inlet pipe 30, then flows into multiple medium flow pipes 4 to absorb heat, and finally converges to the medium outlet pipe 40 for discharge.

[0043] Both the medium inlet pipe 30 and the medium outlet pipe 40 are equipped with pipe joints 50 extending out of the heat collection and insulation box 10 for pipeline connection, ensuring normal medium flow. The collectors can be used in parallel, in which case pipe joints 50 are welded to both ends of the medium inlet pipe 30 and the medium outlet pipe 40 to achieve parallel connection. For collectors used alone or in parallel connections, the pipe joints 50 on the medium inlet pipe 30 or the medium outlet pipe 40 need to be sealed, or plugs need to be directly welded on.

[0044] The foregoing basic examples and their further alternative examples can be freely combined to form multiple embodiments, all of which are embodiments that can be adopted and claimed in this application. In the scheme of this application, each alternative example can be arbitrarily combined with any other basic example and alternative example.

[0045] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A solar collector core, comprising a collector substrate (1), a heat transfer clamp (3), and a medium flow tube (4), characterized in that: The heat collection substrate (1) has a heat collection blue film (2) on its upper surface, a substrate tube groove (6) on its lower surface, and a clamping plate tube groove (7) on its upper surface. The heat collection substrate (1) is connected to the heat transfer clamping plate (3), and a medium flow tube (4) is matched and clamped between the substrate tube groove (6) and the clamping plate tube groove (7). The heat collection substrate (1) and heat transfer clamp (3) are made of aluminum alloy, and the medium flow tube (4) is made of stainless steel; the heat collection substrate (1) and heat transfer clamp (3) are integral die-cast structures. The substrate tube groove (6) is an arc-shaped groove that matches the medium flow tube (4), the clamping plate groove (7) is a V-shaped groove, and the bottom of the clamping plate groove (7) is an arc-shaped groove bottom that matches the medium flow tube (4); the groove depth of the substrate tube groove (6) is less than the radius of the flow tube, and the groove depth of the clamping plate groove (7) is greater than the radius of the flow tube.

2. The solar collector core according to claim 1, characterized in that: The heat collection substrate (1) is a flat plate structure after removing the substrate tube groove (6), and the heat transfer clamp (3) is a flat plate structure after removing the clamp tube groove (7).

3. The solar collector core according to claim 1, characterized in that: The heat collection substrate (1) and the heat transfer clamp (3) are connected by laser welding points (5).

4. The solar collector core according to claim 3, characterized in that: The laser welding points (5) are located on both sides of the medium flow tube (4) and are arranged at equal intervals along the flow tube direction.

5. The solar collector core according to claim 1, characterized in that: The heat collection substrate (1) is provided with a number of substrate tube grooves (6), which are arranged at equal intervals. The heat transfer clamp (3) is provided with a number of pieces equal to the number of substrate tube grooves (6). The clamp tube groove (7) is located in the middle of the heat transfer clamp (3). The medium flow pipe (4) is provided with a number of tubes equal to the number of substrate tube grooves (6).

6. A solar collector, comprising a heat collection and insulation box (10) and a transparent glass plate (20), characterized in that: It also includes the solar collector core as described in any one of claims 1 to 5, wherein the heat-collecting blue film (2) is opposite to the transparent glass plate (20).

7. The solar collector according to claim 6, characterized in that: It also includes a medium inlet pipe (30) and a medium outlet pipe (40) inside the heat collection and insulation box (10). The medium inlet pipe (30) is connected to one end of the medium flow pipe (4), and the medium outlet pipe (40) is connected to the other end of the medium flow pipe (4). Both the medium inlet pipe (30) and the medium outlet pipe (40) are provided with pipe joints (50) that extend out of the heat collection and insulation box (10).

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