Manufacturing method of solar heat collection plate core and heat collector

Abstract

The invention discloses a manufacturing method of a solar heat collection plate core and a heat collector. The manufacturing method of the heat collection plate core comprises the steps that a heat collection base plate with a plurality of base plate pipe grooves is prepared; a heat collection blue film is plated on the upper surface of the heat collection substrate; preparing a heat transfer clamping plate with a clamping plate pipe groove; the medium flow pipe is clamped between the base plate pipe groove of the heat collection base plate and the clamping plate pipe groove of the heat transfer clamping plate, and the heat collection base plate is attached to the heat transfer clamping plate; and the heat collection substrate and the heat transfer clamping plate are welded and fixed. According to the manufacturing method of the heat collector, the plate core structure manufactured through the manufacturing method is obtained, and the medium inlet pipe and the medium outlet pipe are fixed to and communicate with the inlet end and the outlet end of the medium flow pipe correspondingly. The plate core structure is arranged in the heat collection heat preservation box, and the heat collection blue film faces the transparent glass plate. The heat collection plate core has the beneficial effects that the manufacturing process of the heat collection plate core is optimized, the plate core with a good heat transfer effect is manufactured by adopting relatively low material cost, meanwhile, the plate core has excellent overall strength, and the overall heat absorption rate is improved through the heat collection blue film.

Description

Technical Field

[0001] This application belongs to the technical field of solar heat collection, and particularly relates to a manufacturing method of a solar heat collection plate core and a heat collector. Background Art

[0002] With the rising cost of fossil energy and the increasingly strict environmental protection requirements, it has promoted the development of solar thermal utilization of new energy products. In particular, flat-plate solar heat collection systems have become more and more popular. As is well known, compared with existing glass tube solar products, flat-plate solar collectors have greatly improved heat collection performance and also show many advantages when combined with buildings.

[0003] At present, the most widely used flat-plate solar collectors at home and abroad are copper-aluminum composite plate cores, in which copper or aluminum flow channels are welded and fixed on copper or aluminum metal plates. This structural form has a high material cost, and the flow channels and the metal plates are directly fixed by welding, resulting in a small heat transfer contact surface between the flow channels and the metal plates, thus making the overall cost of the heat collector high and the heat collection effect poor. Summary of the Invention

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

[0005] The purpose of this application is achieved through the following technical solutions:

[0006] A manufacturing method of a solar heat collection plate core includes the following steps:

[0007] Step 1, prepare a heat collection substrate with several substrate tube grooves;

[0008] Step 2, coat a heat collection blue film on the upper surface of the heat collection substrate;

[0009] Step 3, prepare a heat transfer clamping plate with clamping plate tube grooves;

[0010] Step 4, clamp the medium flow tube between the substrate tube grooves of the heat collection substrate and the clamping plate tube grooves of the heat transfer clamping plate, and the heat collection substrate and the heat transfer clamping plate are attached;

[0011] Step 5, weld and fix the heat collection substrate and the heat transfer clamping plate.

[0012] Further, in the above Step 1, the heat collection substrate is formed by die-casting and has a thickness of 0.2 - 0.3 mm; in Step 3, the heat transfer clamping plate is formed by die-casting and has a thickness of 0.3 - 0.5 mm.

[0013] Further, in the above Step 2, the heat collection blue film is coated on the heat collection substrate by using physical vapor deposition technology and the vacuum magnetron sputtering method.

[0014] Further, in the fifth step, a number of laser welding points are formed between the heat collection substrate and the heat transfer clamping plate by laser welding to achieve fixation.

[0015] Further, in the fifth step, the laser welding machine drives the laser welding head to move to the welding positions in the X, Y, and Z directions, and a number of laser welding points are formed at equal intervals along the flow tube direction on both sides of the medium flow tube.

[0016] Further, the heat collection substrate and the heat transfer clamping plate are made of aluminum alloy material, and the medium flow tube is made of stainless steel material.

[0017] Further, the plate body of the heat collection substrate excluding the substrate tube groove is a flat plate structure, and the plate body of the heat transfer clamping plate excluding the clamping plate tube groove is a flat plate structure.

[0018] Further, the substrate tube groove is an arc groove matching the medium flow tube, the clamping plate tube groove is a V-shaped groove, and the groove bottom of the clamping plate tube groove is an arc groove bottom matching the medium flow tube.

[0019] Further, a number of substrate tube grooves are arranged at equal intervals on the heat collection substrate, and the clamping plate tube groove is located in the middle of the heat transfer clamping plate.

[0020] A manufacturing method of a solar collector, obtaining the core structure manufactured by the above-mentioned manufacturing method of the solar heat collection plate core, further comprising the following steps:

[0021] Step S1, fixing and connecting a medium inlet pipe and a medium outlet pipe at the inlet end and the outlet end of the medium flow tube respectively;

[0022] Step S2, preparing a heat collection and insulation box with a transparent glass plate;

[0023] Step S3, loading the core structure into the heat collection and insulation box, with the heat collection blue film facing the transparent glass plate, and the pipe joints of the medium inlet pipe and the medium outlet pipe extending out of the heat collection and insulation box.

[0024] Advantages of the present application:

[0025] (1) Optimize the manufacturing process of the heat collection plate core, obtain a core with good heat transfer effect by using relatively low material cost, and at the same time the core has excellent overall strength. Then, improve the overall heat absorption rate through the heat collection blue film, making the final core low in cost, high in quality, and good in effect.

[0026] (2) Adopt a sandwich structure in which the heat collection substrate and the heat transfer clamping plate clamp and fix the medium flow tube. Through the heat transfer transition function of the heat transfer clamping plate, increase the heat receiving area of the medium flow tube, and can effectively transfer the heat of the heat collection substrate to the medium in the flow tube, improving the heat collection effect.

[0027] (3) The heat collection substrate, heat transfer splint, and medium flow channel are made of aluminum alloy or stainless steel with relatively low cost. While ensuring good heat transfer effect and structural strength through a sandwich structure, the processing and manufacturing method is optimized to reduce the overall cost and improve the market competitiveness of the product.

[0028] (4) A heat collection blue film is coated on the heat collection substrate. The heat collection blue film is deposited on the metal substrate by using physical vapor deposition technology and the vacuum magnetron sputtering method. It has a very high absorption rate for solar radiant energy and a very low emissivity of its own, which can effectively improve the solar thermal conversion efficiency.

[0029] The main solution of the present application and its various further alternative solutions described above can be freely combined to form multiple solutions, all of which are solutions that can be adopted and claimed in the present application; and in the present application, (each non-conflicting alternative) can be freely combined with each other and with other alternatives. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present application, all of which are the technical solutions to be protected in the present application and will not be enumerated here. Description of the Drawings

[0030] Figure 1 It is a partial structure assembly diagram of the heat collection plate core of the present application.

[0031] Figure 2 It is a partial structure disassembly diagram of the heat collection plate core of the present application.

[0032] Figure 3 It is a schematic diagram of the overall structure of the heat collection plate core of the present application.

[0033] Figure 4 It is a schematic diagram of the back structure of the heat collection substrate of the heat collector of the present application.

[0034] Figure 5 It is a schematic diagram of the side structure of the heat collection substrate of the heat collector of the present application.

[0035] Figure 6 It is a schematic diagram of the overall structure of the heat collector of the present application.

[0036] In the figure: 1 - heat collection substrate, 2 - heat collection blue film, 3 - heat transfer splint, 4 - medium flow pipe, 5 - laser solder joint, 6 - substrate pipe groove, 7 - splint pipe groove; 10 - heat collection insulation box, 20 - transparent glass plate, 30 - medium inlet pipe, 40 - medium outlet pipe, 50 - pipe joint. Detailed Embodiments

[0037] The following non-restrictive embodiments are used to illustrate the present application.

[0038] Embodiment 1

[0039] Reference Figures 1 to 3As shown in the figure, a manufacturing method of a solar heat collection panel core includes the following steps: Step 1, prepare a heat collection substrate 1 with a number of substrate tube grooves 6.

[0040] The heat collection substrate 1 is made of aluminum alloy, formed by die-casting, with a thickness of 0.2 - 0.3 mm, a length of (2 - 4 m) * (0.5 - 2 m), having good heat conduction performance and structural strength. The lower surface of the heat collection substrate 1 is provided with substrate tube grooves 6, and the substrate tube grooves 6 are used for the matching placement of the upper part of the medium flow tube 4. The plate body of the heat collection substrate 1 excluding the substrate tube grooves 6 is a flat structure, ensuring that the heat collection substrate 1 has a large-area heat collection surface facing the sun. The heat collection substrate 1 is an integral die-cast structure, which is convenient for processing and manufacturing, and has high overall strength.

[0041] Step 2, deposit a heat collection blue film 2 on the upper surface of the heat collection substrate 1. The heat collection blue film 2 is deposited on the heat collection substrate 1 by using physical vapor deposition technology and the vacuum magnetron sputtering method. The heat collection blue film is a solar selective absorption vacuum coating, deposited on a metal substrate by using physical vapor deposition technology and the vacuum magnetron sputtering method. It belongs to a new generation of solar energy utilization technology, having a very high absorption rate for solar radiant energy, and its own emissivity is very low, which can effectively improve the solar photothermal conversion efficiency.

[0042] Step 3, prepare a heat transfer clamping plate 3 with clamping plate tube grooves 7. The heat transfer clamping plate 3 is made of aluminum alloy, with a thickness of 0.3 - 0.5 mm, a length and width of (1.5 - 3.5 m) * (30 - 40 mm), having good heat conduction performance and structural strength. The upper surface of the heat transfer clamping plate 3 is provided with clamping plate tube grooves 7, and the clamping plate tube grooves 7 are used for the matching placement of the lower part of the medium flow tube 4. The plate body of the heat transfer clamping plate 3 excluding the clamping plate tube grooves 7 is a flat structure, realizing the fitting connection with the heat collection substrate 1 to increase the heat transfer path. The heat transfer clamping plate 3 is an integral die-cast structure, which is convenient for processing and manufacturing, and has high overall strength.

[0043] Step 4, clamp the medium flow tube 4 between the substrate tube grooves 6 of the heat collection substrate 1 and the clamping plate tube grooves 7 of the heat transfer clamping plate 3, and the heat collection substrate 1 is in contact with the heat transfer clamping plate 3. Then, the heat of the heat collection substrate 1 can be directly transferred to the medium flow tube 4, and at the same time, the heat of the heat collection substrate 1 can also be transferred to the medium flow tube 4 through the transition of the heat transfer clamping plate 3, thereby increasing the heating surface of the medium flow tube 4 and ensuring that the heat on the heat collection substrate 1 can be quickly and effectively transferred to the medium.

[0044] The medium flow tube 4 is made of stainless steel, with a pipe diameter of 6 - 10 mm, having a lower cost, while ensuring good heat conduction performance and structural strength. A low-temperature medium is introduced into the medium flow tube 4, and during the process of flowing in the tube, it absorbs the heat of the heat collection substrate 1 and then discharges. The low-temperature medium can be cold oil or cold water, or other cold liquids can also be used. Under special working conditions, cold air can also be introduced, and the discharge temperature of the medium can reach 55 - 85 °C.

[0045] Step 5: Weld and fix the heat - collecting substrate 1 and the heat - transfer clamping plate 3. Laser welding is used to form a number of laser welding points 5 between the heat - collecting substrate 1 and the heat - transfer clamping plate 3 to achieve fixation, thus realizing the fixed connection between the heat - collecting substrate 1 and the heat - transfer clamping plate 3, and ensuring the fitting and fixation of the medium flow tube 4 between the two.

[0046] The laser welding machine drives the laser welding head to move along the X - direction, Y - direction, and Z - direction to the welding positions, and a number of laser welding points 5 are formed at equal intervals along the flow - tube direction on both sides of the medium flow tube 4. The laser welding machine uses a programmed automation device and can automatically perform stepping and welding.

[0047] A number of substrate tube grooves 6 (seven in this embodiment) are provided on the heat - collecting substrate 1. The a number of substrate tube grooves 6 are arranged at equal intervals. The heat - transfer clamping plate 3 is provided with a number of (corresponding to seven) pieces equal to the number of substrate tube grooves 6. The clamping - plate tube grooves 7 are located in the middle of the heat - transfer clamping plate 3. The medium flow tube 4 is provided with a number of (corresponding to seven) roots equal to the number of substrate tube grooves 6. Then, multiple heat - transfer clamping plates 3 are combined with one heat - collecting substrate 1 to realize the arrangement of multiple medium flow tubes 4, and multiple medium flow tubes 4 are used to absorb the heat on the entire heat - collecting substrate 1, ensuring uniform and sufficient heat absorption.

[0048] The substrate tube groove 6 is an arc - shaped groove matching the medium flow tube 4, realizing the fitting and matching of the upper part of the substrate tube groove 6 and the medium flow tube 4. The clamping - plate tube groove 7 is a V - shaped groove, and the bottom of the clamping - plate tube groove 7 is an arc - shaped groove bottom matching the medium flow tube 4, realizing the fitting and matching of the lower part of the clamping - plate tube groove 7 and the medium flow tube 4.

[0049] The depth of the substrate tube groove 6 is less than the radius of the flow tube, and 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 - collecting substrate 1. At the same time, since the clamping - plate tube groove 7 is a V - shaped groove, optimizing the corner structure of the groove plate also reduces the die - casting difficulty of the heat - transfer clamping plate 3.

[0050] Embodiment 2

[0051] Reference Figures 1 to 6 As shown, a manufacturing method of a solar collector obtains the core structure of the solar heat - collecting plate prepared by the manufacturing method of Embodiment 1, and further includes the following steps: Step S1: Fix and connect a medium inlet pipe 30 and a medium outlet pipe 40 at the inlet end and the outlet end of the medium flow tube 4 respectively, and specifically realize the connection between the medium flow tube 4 and the inlet pipe and the outlet pipe by welding.

[0052] A medium inlet pipe 30 and a medium outlet pipe 40 are each provided with one and are respectively arranged on both sides of the heat collection and insulation box 10. The medium inlet pipe 30 is welded and connected to one end of the medium flow pipe 4, and the medium outlet pipe 40 is welded and connected to the other end of the medium flow pipe 4. Then, the low-temperature medium enters from the medium inlet pipe 30, and then is divided into multiple medium flow pipes 4 for heat absorption, and then converges to the medium outlet pipe 40 for discharge.

[0053] Step S2: Prepare the heat collection and insulation box 10 with the transparent glass plate 20.

[0054] Step S3: Install the core structure into the heat collection and insulation box 10, with the heat collection blue film 2 facing the transparent glass plate 20. Then, sunlight passes through the transparent glass plate 20 and irradiates on the heat collection blue film 2. The heat collection blue film 2 absorbs the heat energy of the sunlight and gradually heats the medium through the heat collection substrate 1, the heat transfer clamping plate 3, and the medium flow pipe 4.

[0055] Pipe connectors 50 are provided on both the medium inlet pipe 30 and the medium outlet pipe 40. The pipe connectors 50 of the medium inlet pipe 30 and the medium outlet pipe 40 extend out of the heat collection and insulation box 10 for pipeline connection to ensure the normal flow of the medium. The collectors can be used in parallel. Then, pipe connectors 50 are welded at both ends of the medium inlet pipe 30 and the medium outlet pipe 40 to achieve parallel connection. For a single collector or a collector at the parallel end, the pipe connector 50 on the medium inlet pipe 30 or the medium outlet pipe 40 needs to be blocked, or a plug is directly welded.

[0056] The basic example of the present application and its various further selected examples can be freely combined to form multiple embodiments, all of which are the embodiments that can be adopted and claimed in the present application. In the solution of the present application, each selected example can be arbitrarily combined with any basic example and selected example.

[0057] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A manufacturing method of a solar heat collecting panel core, characterized in that, It includes the following steps: Step 1: Prepare a heat collection substrate (1) with a number of substrate tube grooves (6); Step 2: Deposit a heat collection blue film (2) on the upper surface of the heat collection substrate (1); Step 3: Prepare a heat transfer clamping plate (3) with clamping plate tube grooves (7); Step 4: Clamp the medium flow tube (4) between the substrate tube groove (6) of the heat collection substrate (1) and the clamping plate tube groove (7) of the heat transfer clamping plate (3), and the heat collection substrate (1) is attached to the heat transfer clamping plate (3); Step 5: Weld and fix the heat collection substrate (1) and the heat transfer clamping plate (3).

2. The manufacturing method of the solar heat collecting panel core according to claim 1, characterized in that: In the above-mentioned Step 1, the heat collection substrate (1) is formed by die-casting, and its thickness is 0.2 - 0.3 mm; in Step 3, the heat transfer clamping plate (3) is formed by die-casting, and its thickness is 0.3 - 0.5 mm.

3. The manufacturing method of the solar heat collection panel core according to claim 1, characterized in that: In the above-mentioned Step 2, the heat collection blue film (2) is deposited on the heat collection substrate (1) by using physical vapor deposition technology and the vacuum magnetron sputtering method.

4. The manufacturing method of the solar heat collecting plate core according to claim 1, characterized in that: In the above-mentioned Step 5, laser welding is used to form a number of laser welding points (5) between the heat collection substrate (1) and the heat transfer clamping plate (3) to achieve fixation.

5. The manufacturing method of the solar heat collecting panel core according to claim 4, characterized in that: In the above-mentioned Step 5, the laser welding machine drives the laser welding head to move to the welding points in the X direction, Y direction and Z direction, and a number of laser welding points (5) are formed at equal intervals on both sides of the medium flow tube (4) and along the flow tube direction.

6. The manufacturing method of the solar heat collection panel core according to claim 1, characterized in that: The heat collection substrate (1) and the heat transfer clamping plate (3) are made of aluminum alloy material, and the medium flow tube (4) is made of stainless steel material.

7. The manufacturing method of the solar heat collecting panel core according to claim 1 or 6, characterized in that: The plate body of the heat collection substrate (1) excluding the substrate tube groove (6) is a flat structure, and the plate body of the heat transfer clamping plate (3) excluding the clamping plate tube groove (7) is a flat structure.

8. The manufacturing method of the solar heat collecting panel core according to claim 1, characterized in that: The substrate tube groove (6) is an arc groove matching the medium flow tube (4), the clamping plate tube groove (7) is a V-shaped groove, and the bottom of the clamping plate tube groove (7) is an arc groove bottom matching the medium flow tube (4).

9. The manufacturing method of the solar heat collecting panel core according to claim 1 or 8, characterized in that: A number of substrate tube grooves (6) are arranged at equal intervals on the heat collection substrate (1), and the clamping plate tube groove (7) is located in the middle of the heat transfer clamping plate (3).

10. A manufacturing method of a solar collector, characterized in that, For the plate core structure obtained by the manufacturing method of the solar heat collection plate core according to any one of claims 1 - 9, the following steps are further included: Step S1: Fix and connect a medium inlet tube (30) and a medium outlet tube (40) at the inlet end and the outlet end of the medium flow tube (4) respectively; Step S2: Prepare a heat collection and heat preservation box (10) with a transparent glass plate (20); Step S3: Install the plate core structure into the heat collection and heat preservation box (10), with the heat collection blue film (2) facing the transparent glass plate (20), and the pipe joints (50) of the medium inlet tube (30) and the medium outlet tube (40) extend out of the heat collection and heat preservation box (10).

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