Medium-temperature solar heat collection plate core and medium-temperature heat collector
By using an aluminum alloy medium main pipe and heat collection fins, combined with a flow divider and flow-blocking structure, the problems of high cost and poor heat collection effect of flat-plate solar collectors have been solved, achieving more efficient solar thermal conversion and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-10
- Publication Date
- 2026-03-24
AI Technical Summary
Existing flat-plate solar collectors are expensive and have poor heat collection performance, mainly due to the small heat transfer contact area between the flow channel and the metal plate, resulting in high overall cost and poor heat collection performance.
The medium main pipe and heat collector fins are made of aluminum alloy. By setting a flow distribution cavity and flow obstruction structure in the medium main pipe, the contact area between the medium and the heat collector fins is increased. A heat collector blue film with high absorption rate is coated on the heat collector fins, and physical vapor deposition technology is used to coat the film to improve the solar thermal conversion efficiency.
This improved the contact area and heat transfer effect between the medium and the heat collector fins, reduced costs, increased solar thermal conversion efficiency, optimized the manufacturing process, and enhanced the product's market competitiveness.
Smart Images
Figure CN224034040U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The application belongs to the field of solar heat collection, and particularly relates to a medium-temperature solar heat collection plate core and a medium-temperature heat collector. BACKGROUND
[0002] With the rising cost of petrochemical energy, the development of new energy products, solar thermal utilization, is promoted, and in particular, flat-plate solar heat collection systems are increasingly popular. As is known, flat-plate solar heat collectors have greatly improved heat collection performance compared with existing glass tube solar products, and many advantages are embodied at the same time of combination with buildings.
[0003] At present, the most widely used flat-plate solar heat collector at home and abroad is a copper-aluminum composite plate core, which welds a copper or aluminum flow channel to a copper or aluminum metal plate. This structure has a high material cost, and the flow channel and the metal plate are directly fixed by welding, resulting in a small heat transfer contact surface between the flow channel and the metal plate, so that the overall cost of the heat collector is high and the heat collection effect is poor. CONTENT OF THE UTILITY MODEL
[0004] The application aims to provide a medium-temperature solar heat collection plate core and a medium-temperature heat collector, which solve the problems of high cost and poor heat collection effect of existing heat collectors.
[0005] The application aims to achieve the above-mentioned purpose through the following technical solutions.
[0006] A medium-temperature solar heat collection plate core comprises a medium main pipe, the side of the medium main pipe is provided with a heat collection wing plate, the upper surfaces of the medium main pipe and the heat collection wing plate are provided with heat collection blue films, the medium main pipe is provided with a shunt hole at the inlet end and the outlet end, the heat collection wing plate is internally provided with a shunt cavity along the pipe, the shunt holes at both ends are in communication with both ends of the shunt cavity, and the medium main pipe is internally provided with a flow resistance structure which is located at the rear of the shunt hole relative to the inlet end.
[0007] Further, the medium main pipe and the heat collection wing plate are made of an aluminum alloy material.
[0008] Further, the medium main pipe is provided with the heat collection wing plate at both sides, and the heat collection wing plates at both sides are symmetrically arranged.
[0009] Further, the upper surface of the heat collection wing plate is a plane, the outer side of the lower surface of the heat collection wing plate is a plane, and the inner side of the lower surface of the heat collection wing plate is a convex platform.
[0010] Further, the outer side of the heat collection wing plate is provided with a downward flange.
[0011] Further, the flow resistance structure completely encloses the medium main pipe or leaves a shunt gap.
[0012] Further, the flow blocking structure comprises flow blocking protrusions and flow blocking balls, the flow blocking protrusions are arranged on the medium main pipe and the flow blocking balls are arranged on the medium main pipe.
[0013] Further, the middle part of the flow distribution cavity is provided with an inner partition plate arranged along the pipe, and the inner partition plate divides the middle part of the flow distribution cavity into at least two unit cavities.
[0014] A medium temperature heat collector comprises a heat collecting and heat preserving box, a transparent glass plate, and the medium temperature solar heat collecting plate core, and the heat collecting blue film is opposite to the transparent glass plate.
[0015] Further, the medium inlet pipe and the medium outlet pipe are arranged in the heat collecting and heat preserving box, the medium inlet pipe is connected to one end of the medium main pipe, the medium outlet pipe is connected to the other end of the medium main pipe, and the pipe joints of the medium inlet pipe and the medium outlet pipe are arranged to extend out of the heat collecting and heat preserving box.
[0016] The beneficial effects of the present application are as follows:
[0017] (1) The flow distribution cavity is arranged in the heat collecting wing plate, the medium fluid in the medium main pipe is distributed to the flow distribution cavity, the medium in the flow distribution cavity directly contacts the heat collecting wing plate, the contact area of the medium and the heat collecting wing plate is increased, the heat exchange between the medium and the heat collecting wing plate is fully realized, and the heat collecting effect is improved.
[0018] (2) The medium flow pipe and the heat collecting wing plate are made of aluminum alloy with low cost, the heat transfer surface is increased by the flow distribution, the processing and manufacturing mode is optimized, the overall cost is reduced, and the market competitiveness of the product is improved.
[0019] (3) The medium main pipe and the heat collecting wing plate are coated with the heat collecting blue film, the heat collecting blue film is plated on the metal base material by the vacuum magnetron sputtering method by using the physical vapor deposition technology, has a very high absorption rate to the solar radiation energy, and has a very low emissivity, and the solar light heat conversion efficiency can be effectively improved.
[0020] The foregoing main scheme and each further selected scheme of the present application can be freely combined to form multiple schemes, which are all the schemes that can be adopted and claimed by the present application; and the present application can also be freely combined between the (each non-conflict selection) selections and between the other selections. Those skilled in the art can understand that there are many combinations according to the prior art and common knowledge after understanding the schemes of the present application, which are all the technical schemes claimed by the present application, and are not listed here. BRIEF DESCRIPTION OF DRAWINGS
[0021] Fig. 1 is the structure front view of the heat collecting plate core of the present application.
[0022] Fig. 2 is the structure top view of the heat collecting plate core of the present application.
[0023] Fig. 3 is the structure of the heat collecting plate core of the present application.
[0024] Fig. 4 is the structure of the flow resistance structure in the heat collecting plate core of the present application.
[0025] Fig. 5 is the internal structure of the heat collector of the present application.
[0026] Fig. 6 is the overall structure of the heat collector of the present application.
[0027] In the figure: 1-medium main pipe, 2-heat collecting wing plate, 3-heat collecting blue film, 4-flow resistance protrusion, 5-flow resistance ball, 6-shunt hole, 7-shunt cavity, 8-inner partition plate, 9-unit cavity; 10-heat collecting insulation box, 20-transparent glass plate, 30-medium inlet pipe, 40-medium outlet pipe, 50-pipe joint. DETAILED DESCRIPTION
[0028] The following non-limiting examples are intended to illustrate the present application.
[0029] Example 1
[0030] Reference Figs. 1-4 As shown in the figure, a medium temperature solar heat collecting plate core includes a medium main pipe 1, a heat collecting wing plate 2, a heat collecting blue film 3, a flow resistance structure (flow resistance protrusion 4 and flow resistance ball 5), a shunt hole 6, a shunt cavity 7, an inner partition plate 8, and a unit cavity 9.
[0031] The medium main pipe 1 is made of aluminum alloy material, with a pipe diameter of 4-8 mm and a wall thickness of 0.4-0.8 mm, for the flow of medium and heat absorption. The medium is heat conducting oil, and other fluids can also be used. The side of the medium main pipe 1 is provided with the heat collecting wing plate 2, which is also made of aluminum alloy material, with a width of 35-45 mm and a plate thickness of 0.4-0.8 mm. The heat collecting wing plate 2 is used to expand the solar energy receiving area to absorb as much solar energy as possible.
[0032] The medium main pipe 1 and the heat collecting wing plate 2 are integrally extruded from aluminum alloy material, which is convenient for processing and manufacturing. The length of the medium main pipe 1 is greater than the length of the heat collecting wing plate 2, so that the medium main pipe 1 protrudes at both ends. The two sides of the medium main pipe 1 are provided with the heat collecting wing plate 2, and the heat collecting wing plates 2 on both sides are symmetrically arranged, i.e. the medium main pipe 1 is arranged in the middle and supports the heat collecting wing plates 2 on both sides.
[0033] The upper surface of the medium main pipe 1 and the heat collecting fin plate 2 is provided with a heat collecting blue film 3, which is a solar energy selective absorption vacuum coating film. The film is plated on a metal substrate by a vacuum magnetron sputtering method using a physical vapor deposition technology. The film belongs to a new generation of solar energy utilization technology, has a very high absorption rate to solar radiation energy, and has a very low self-emissivity, so that the solar energy light-heat conversion efficiency can be effectively improved. The heat absorbed by the blue film is directly transmitted to the medium main pipe 1 and the heat collecting fin plate 2.
[0034] The medium main pipe 1 is provided with a flow dividing hole 6 on each of the inlet end and the outlet end. The heat collecting fin plate 2 is provided with a flow dividing cavity 7 inside the heat collecting fin plate 2. The flow dividing cavity 7 is in communication with the flow dividing holes 6 at the two ends. The width of the flow dividing cavity 7 is 25-35 mm, and the flow dividing cavity 7 does not completely occupy the width of the heat collecting fin plate 2. The height of the flow dividing cavity 7 is 2.5-3.5 mm.
[0035] The medium flows into the medium main pipe 1 from the inlet end, is divided into two sides from the flow dividing hole at the inlet end to the flow dividing cavity 7, flows backward in the flow dividing cavity 7, and is gathered again into the medium main pipe 1 from the flow dividing hole at the outlet end and is discharged from the outlet end. The arrangement of the flow dividing cavity 7 increases the flow channel of the medium, realizes the direct contact between the medium and the heat collecting fin plate 2, greatly increases the heat exchange area, improves the heat exchange and heat transfer effect of the overall plate core, and the medium discharge temperature reaches 100-130℃.
[0036] The medium main pipe 1 is provided with a flow dividing hole 6 on each of the inlet end and the outlet end. The heat collecting fin plate 2 is provided with a flow dividing cavity 7 inside the heat collecting fin plate 2. The flow dividing cavity 7 is in communication with the flow dividing holes 6 at the two ends. The width of the flow dividing cavity 7 is 25-35 mm, and the flow dividing cavity 7 does not completely occupy the width of the heat collecting fin plate 2. The height of the flow dividing cavity 7 is 2.5-3.5 mm.
[0037] The flow dividing structure completely seals the medium main pipe 1 or leaves a flow dividing gap. That is, the flow dividing structure completely seals the medium main pipe 1, and the medium only flows through the heat collecting fin plate 2 without passing through the middle section of the medium main pipe 1, which wastes the heat exchange area of the middle section of the medium main pipe 1. Alternatively, the flow dividing structure does not completely seal the medium main pipe 1, and part of the medium still flows through the middle section of the medium main pipe 1 to absorb heat, so that the medium is reasonably divided and fully heat exchanged.
[0038] The upper surface of the heat collecting fin plate 2 is a plane, which is convenient for processing and manufacturing and facilitates the plating of the heat collecting blue film to form a large heat absorbing surface. The outer side of the lower surface of the heat collecting fin plate 2 is a plane, which maintains the flat plate structure of the outer side of the fin plate. The inner side of the lower surface of the heat collecting fin plate 2 is a boss, which is a protruding space of the internal flow dividing cavity. The lower surface of the boss is flush with the lower end of the main pipe, and the outer part of the boss is transitioned to the outer plane through a circular arc, which is convenient for processing and manufacturing and ensures the structural strength. The outer side of the heat collecting fin plate 2 integrally extends a downward flange, which serves as a rib to improve the structural strength.
[0039] The flow blocking structure comprises a flow blocking protrusion 4 and a flow blocking ball 5, the flow blocking protrusion 4 is arranged on the medium main pipe 1 and the flow blocking ball 5 is clamped forward and backward along the pipe, that is, the flow blocking protrusion 4 is a pipe wall with a protrusion pressed inward, the flow blocking ball 5 is limited forward and backward by the protrusion, and the flow blocking effect of the ball under the impact of fluid is ensured. The flow blocking ball 5 is a steel ball, and the diameter of the flow blocking ball 5 is smaller than the inner diameter of the medium main pipe 1, so that a shunt gap is left.
[0040] The middle part of the shunt cavity 7 is provided with an inner partition plate 8 arranged along the pipe, the inner partition plate 8 is an integral structure of the same material as the heat collecting wing plate 2, the inner partition plate 8 divides the middle part of the shunt cavity 7 into at least two unit cavities 9, specifically two unit cavities 9 in this example, the unit cavities 9 further shunt the medium in the shunt cavity 7, ensure uniform and stable flow of the internal medium, and ensure good heat transfer effect.
[0041] Embodiment 2
[0042] Reference Figs. 1-6 As shown in the figure, a medium temperature heat collector comprises a heat collecting and heat preserving box 10 and a transparent glass plate 20, and further comprises the medium temperature solar heat collecting plate core of embodiment 1, the heat collecting blue film 3 is opposite to the transparent glass plate 20, then the sunlight transmits through the transparent glass plate 20 and irradiates on the heat collecting blue film 3, the heat collecting blue film 3 absorbs the heat energy of the sunlight, directly contacts the medium through the medium main pipe 1 and the heat collecting wing plate 2, and fully heats the medium.
[0043] Further comprising a medium inlet pipe 30 and a medium outlet pipe 40 in the heat collecting and heat preserving box 10, the medium inlet pipe 30 and the medium outlet pipe 40 are each provided with one pipe joint and are respectively located at two sides of the heat collecting and heat preserving box 10, the medium inlet pipe 30 is welded and connected with one end of the plurality of medium main pipes 1, and the medium outlet pipe 40 is welded and connected with the other end of the plurality of medium main pipes 1. Then the low temperature medium enters from the medium inlet pipe 30, is shunted to the plurality of medium main pipes 1 and the heat collecting wing plates 2 thereof to realize heat absorption, and is then converged to the medium outlet pipe 40 for discharge.
[0044] The medium inlet pipe 30 and the medium outlet pipe 40 are each provided with a pipe joint 50 extending out of the heat collecting and heat preserving box 10. The pipe joint 50 is used for pipeline communication and ensures normal flow of the medium. The heat collector can be used in a parallel mode, then the two ends of the medium inlet pipe 30 and the medium outlet pipe 40 are welded with the pipe joint 50 to realize parallel communication. For the heat collector used alone and the parallel end heat collector, the pipe joint 50 on the medium inlet pipe 30 or the medium outlet pipe 40 needs to be blocked, or a plug is directly welded.
[0045] The foregoing basic examples and each further selected example of the present application can be freely combined to form a plurality of embodiments, all of which are embodiments that can be adopted and claimed by the present application. In the present application scheme, each selected example can be arbitrarily combined with any basic example and selected example.
[0046] The above only describes preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims
1. A medium temperature solar thermal panel core comprising a media header (1), characterised in that: The side of the medium main pipe (1) is provided with a heat collecting fin (2), the upper surface of the medium main pipe (1) and the heat collecting fin (2) is provided with a heat collecting blue film (3), the inlet end and the outlet end of the medium main pipe (1) are provided with a shunt hole (6), the heat collecting fin (2) is internally provided with a shunt cavity (7) along the pipe direction, the two ends of the shunt hole (6) are respectively communicated with the two ends of the shunt cavity (7), and the medium main pipe (1) is internally provided with a flow resistance structure which is located behind the shunt hole (6) along the flow direction.
2. The medium temperature solar panel core of claim 1, wherein: The medium main pipe (1) and the heat collecting fin (2) are integrated aluminum alloy materials.
3. A medium temperature solar thermal panel core according to claim 1 or 2, characterised in that: The two sides of the medium main pipe (1) are provided with the heat collecting fin (2), and the heat collecting fins (2) on the two sides are symmetrically arranged.
4. The medium temperature solar panel core of claim 1, wherein: The upper surface of the heat collecting fin (2) is a plane, the outer side of the lower surface of the heat collecting fin (2) is a plane, and the inner side of the lower surface of the heat collecting fin (2) is a convex platform.
5. The medium temperature solar panel core of claim 1 or 4, wherein: The outer side of the heat collecting fin (2) is provided with a downward flange.
6. The medium temperature solar panel core of claim 1, wherein: The flow resistance structure completely closes the medium main pipe (1) or leaves a shunt gap.
7. The medium temperature solar panel core of claim 1 or 6, wherein: The flow resistance structure comprises a flow resistance protrusion (4) and a flow resistance ball (5), the flow resistance protrusion (4) is arranged on the medium main pipe (1) and clamps the flow resistance ball (5) along the pipe direction.
8. The medium temperature solar panel core of claim 1, wherein: The middle part of the shunt cavity (7) is provided with an inner partition plate (8) arranged along the pipe direction, and the inner partition plate (8) divides the middle part of the shunt cavity (7) into at least two unit cavities (9).
9. A medium temperature heat collector comprising a heat collecting and heat retaining box (10) and a transparent glass plate (20), characterized in that: The medium main pipe (1) and the heat collecting fin (2) are integrated aluminum alloy materials.
10. The medium temperature thermal collector of claim 9, wherein: The medium inlet pipe (30) and the medium outlet pipe (40) in the heat collecting and heat preserving box (10) are connected with one end and the other end of the medium main pipe (1) respectively, and the medium inlet pipe (30) and the medium outlet pipe (40) are provided with pipe joints (50) which extend out of the heat collecting and heat preserving box (10).