Medium-temperature solar heat collection module and heat collector

Abstract

The utility model discloses a medium-temperature solar heat collection module and a heat collector. The heat collection module comprises a heat collection heat preservation box, a glass cover plate is arranged on the upper portion of the heat collection heat preservation box, a medium-temperature heat collection plate core is arranged in the heat collection heat preservation box and comprises a medium header pipe, the two ends of the medium header pipe extend out of the heat collection heat preservation box respectively, and heat collection wing plates are arranged on the side portion of the medium header pipe. Heat collection blue films are arranged on the upper surfaces of the medium header pipe and the heat collection wing plates, flow dividing holes are formed in the inlet end and the outlet end of the medium header pipe, flow dividing cavities are formed in the heat collection wing plates, the flow dividing holes in the two ends communicate with the two ends of the flow dividing cavities correspondingly, and flow blocking structures are arranged in the medium header pipe. The heat collector comprises a main inlet pipe and a main outlet pipe, and further comprises the medium-temperature solar heat collection module. The solar heat collector has the beneficial effects that standardized module design of the heat collector is achieved, fault modules can be independently replaced, the system availability rate is greatly improved, meanwhile, capacity expansion according to needs is supported, and the solar heat collector adapts to dynamic changes of building energy needs.

Description

Technical Field

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

[0002] Solar thermal energy collection technology, as an important branch of renewable energy utilization, converts solar radiation energy into heat energy and is widely used in residential hot water supply, industrial process heating, building heating and cooling, and other fields. Its core device, the solar thermal collector, can be divided into main types according to the photothermal conversion principle, such as flat plate type, vacuum tube type, and concentrating type.

[0003] Flat-plate solar collectors mainly consist of an absorber plate, a transparent cover, an insulation layer, and an outer shell, exhibiting a simple structure and low cost. With the gradual development of flat-plate solar collectors, their modular design concept has become a research hotspot. The core of this concept lies in standardizing the collector unit into independent functional modules, allowing for flexible combinations to meet diverse needs and providing advantages in production, installation, and operation / maintenance. Therefore, modular flat-plate solar collectors urgently need to be developed. Utility Model Content

[0004] The purpose of this application is to provide a medium-temperature solar thermal collector module and collector, which solves the problem that existing flat-plate collectors cannot achieve miniaturization and modularization.

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

[0006] A medium-temperature solar thermal collector module includes a heat collection and insulation box with a glass cover on the top. A medium-temperature heat collection core is located inside the heat collection and insulation box. The medium-temperature heat collection core includes a medium main pipe with both ends extending out of the heat collection and insulation box. A heat collection wing plate is located on the side of the medium main pipe. A heat collection blue film is located on the upper surface of the medium main pipe and the heat collection wing plate, opposite to the glass cover. Diversion holes are provided at both the inlet and outlet ends of the medium main pipe. A diversion cavity is provided inside the heat collection wing plate along the pipe direction. The diversion holes at both ends are connected to the two ends of the diversion cavity. A flow-blocking structure is located behind the diversion hole at the inlet end along the flow direction inside the medium main pipe.

[0007] Furthermore, the heat collection and insulation box has a cuboid outline with a U-shaped cross-section.

[0008] Furthermore, the heat collection and insulation box is made of PVC insulation material.

[0009] Furthermore, the main medium pipe and the heat collecting fins are made of aluminum alloy as a single unit.

[0010] Furthermore, heat collecting fins are provided on both sides of the main medium pipe, and the heat collecting fins on both sides are arranged symmetrically.

[0011] Furthermore, the upper surface of the heat-collecting wing plate is a plane, the outer side of the lower surface of the heat-collecting wing plate is a plane, and the inner side of the lower surface of the heat-collecting wing plate is a boss.

[0012] Furthermore, the outer side of the heat-collecting fin plate is provided with a downward-facing flange.

[0013] Furthermore, the flow-blocking structure completely encloses the main medium pipe or leaves a flow-diverting gap.

[0014] Furthermore, the flow-blocking structure includes a flow-blocking protrusion and a flow-blocking ball, with the flow-blocking protrusion disposed on the main medium pipe and the flow-blocking ball positioned along the pipe from front to back.

[0015] Furthermore, the middle part of the diversion cavity is provided with an inner partition plate arranged along the pipe direction, which divides the middle part of the diversion cavity into at least two unit cavities.

[0016] A medium-temperature solar collector includes a main inlet pipe and a main outlet pipe, and also includes the aforementioned medium-temperature solar collector module. The main inlet pipe is connected to the inlet end of the medium main pipe, and the main outlet pipe is connected to the outlet end of the medium main pipe.

[0017] The beneficial effects of this application are:

[0018] (1) Achieving standardized modular design of solar collectors, dividing traditional large-volume solar collectors into several small solar collector modules, allowing faulty modules to be replaced individually, greatly improving system availability, and supporting on-demand capacity expansion to adapt to dynamic changes in building energy demand.

[0019] (2) Standardized module design facilitates mass production, reduces marginal costs, and improves consistency, which facilitates quality control.

[0020] (3) A flow distribution cavity is opened inside the heat collector fin plate to divert the medium fluid in the medium main pipe to the flow distribution cavity. The medium in the flow distribution cavity is in direct contact with the heat collector fin plate, which increases the contact area between the medium and the heat collector fin plate, realizes sufficient heat exchange between the medium and the heat collector fin plate, and improves the heat collection effect.

[0021] 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

[0022] Figure 1 This is a cross-sectional view of the heat collection module structure in this application.

[0023] Figure 2This is a top view of the structure of the heat collection plate core in this application.

[0024] Figure 3 This is a bottom view of the structure of the heat collection plate core in this application.

[0025] Figure 4 This is a schematic diagram of the flow-blocking structure in the core of the heat collector plate of this application.

[0026] Figure 5 This is the main view of the solar collector structure in this application.

[0027] Figure 6 This is a top view of the solar collector structure in this application.

[0028] In the diagram: 1-Main medium pipe, 2-Heat collector fin plate, 3-Heat collector blue film, 4-Flow-blocking protrusion, 5-Flow-blocking ball, 6-Flow-diverting hole, 7-Flow-diverting cavity, 8-Inner partition plate, 9-Unit cavity, 10-Heat collector insulation box, 11-Glass cover plate, 12-Main inlet pipe, 13-Main outlet pipe Detailed Implementation

[0029] The present application will be further described below with reference to specific embodiments and accompanying drawings.

[0030] Example 1

[0031] refer to Figures 1-4 As shown, a medium-temperature solar thermal collector module includes a medium-temperature collector core, a heat collection insulation box 10, and a glass cover plate 11. The medium-temperature collector core includes a medium main pipe 1, a heat collection wing plate 2, a heat collection blue film 3, a flow-blocking structure (flow-blocking protrusion 4 and flow-blocking ball 5), a flow-diverting hole 6, a flow-diverting cavity 7, an inner partition plate 8, and a unit cavity 9.

[0032] The heat collection and insulation box 10 is used for heat preservation to reduce the loss of absorbed heat. The upper part of the heat collection and insulation box 10 is provided with a glass cover plate 11, which allows sunlight to pass into the heat collection and insulation box 10. Except for the openings at the front and rear of the heat collection and insulation box 10 for the medium main pipe 1 to extend out, the heat collection and insulation box 10 and the glass cover plate 11 form a relatively closed structure.

[0033] The heat collection and insulation box 10 has a U-shaped cross-section and a rectangular outline. Its standard shape makes it easy to manufacture and install, facilitating installation and maintenance. The glass cover 11 is a corresponding rectangular plate structure, fixed to the upper opening of the U-shape. The glass cover 11 can be glued to the box body with sealant or pressed onto the box body using a pressing mechanism. The heat collection and insulation box 10 is preferably made of PVC insulation material, which has properties such as heat insulation, moisture retention, anti-condensation, and anti-aging.

[0034] The heat collection and insulation box 10 is equipped with a medium-temperature heat collection plate core, which is used to absorb solar energy and transfer heat to the medium. Both ends of the medium main pipe 1 extend out of the heat collection and insulation box 10. The heat collection and insulation box 10 is equipped with a single medium-temperature heat collection plate core, that is, a single heat collection and insulation box 10 forms a self-contained modular system, and a single module can realize the functions of heat preservation and heat collection.

[0035] The main medium pipe 1 is made of aluminum alloy and is used for the flow and heat absorption of the medium. The medium is heat transfer oil, but other fluids can also be used. A heat collection fin plate 2, also made of aluminum alloy, is provided on the side of the main medium pipe 1. The heat collection fin plate 2 is used to expand the solar energy receiving area to absorb as much solar energy as possible.

[0036] The medium main pipe 1 and the heat collecting vane 2 are made of aluminum alloy through integral extrusion molding, which facilitates processing and manufacturing. The length of the medium main pipe 1 is longer than the length of the heat collecting vane 2, so that the medium main pipe 1 extends outwards at both ends. Heat collecting vanes 2 are provided on both sides of the medium main pipe 1, and the heat collecting vanes 2 on both sides are symmetrically arranged, that is, the medium main pipe 1 is located in the middle, and the heat collecting vanes 2 are symmetrically arranged on both sides.

[0037] The heat-collecting fins 2 are positioned at the steps on both sides of the U-shape, allowing the medium-temperature heat-collecting core to be placed inside the heat-collecting and insulation box 10. The heat-collecting fins 2 are located at the opening of the U-shape, directly facing the glass for heat absorption above, and serving as a heat storage cavity below, with no medium flowing through them. The heat-collecting fins 2 are limited by the glass cover 11 above, and can also be additionally glued or press-fitted using pressure components.

[0038] The upper surface of the medium main pipe 1 and the heat collection fin plate 2 is provided with a heat collection blue film 3 opposite to the glass cover plate 11. The heat collection blue film is a solar selective absorption vacuum coating, which is deposited on the metal substrate by vacuum magnetron sputtering using physical vapor deposition technology. It belongs to the new generation of solar energy utilization technology, has an extremely high absorption rate of solar radiation energy, and its own emissivity is very low, which can effectively improve the solar photothermal conversion efficiency. The heat absorbed by the blue film is directly transferred to the medium main pipe 1 and the heat collection fin plate 2.

[0039] The upper surface of the heat collector vane 2 is flat, facilitating manufacturing and the coating of the heat-collecting blue film to form a large-area heat-absorbing surface. The outer side of the lower surface of the heat collector vane 2 is flat, maintaining the straight plate structure of the outer side of the vane. The inner side of the lower surface of the heat collector vane 2 has a boss, which is the protruding space of the internal flow distribution cavity. The lower surface of the boss is flush with the lower end of the main pipe, and the outer side of the boss transitions to the outer flat surface through an arc, facilitating manufacturing and ensuring structural strength. The outer side of the heat collector vane 2 has an integrally extended downward-facing flange, which acts as a rib to improve structural strength.

[0040] Both the inlet and outlet ends of the medium main pipe 1 are provided with diversion holes 6, and the heat collection wing plate 2 is provided with a diversion cavity 7 along the pipe direction. The diversion holes 6 at both ends are connected to the two ends of the diversion cavity 7 respectively. The diversion cavity does not completely occupy the width of the heat collection wing plate 2.

[0041] The medium enters the main medium pipe 1 from the inlet end, and then flows to both sides through the diversion holes at the inlet end into the diversion chambers 7. Within the diversion chambers 7, the medium flows backward, and then converges back into the main medium pipe 1 through the diversion holes at the outlet end, and is discharged from the outlet end. The arrangement of the diversion chambers 7 increases the flow channels for the medium, achieving direct contact between the medium and the heat collection fins 2, greatly increasing the heat exchange area and improving the overall heat exchange and heat transfer effect of the plate core. The medium discharge temperature reaches 100–130℃.

[0042] The medium main pipe 1 is provided with a flow-blocking structure with a flow-blocking hole 6 at the inlet end and a flow-blocking structure at the rear along the flow direction. The flow-blocking structure is used to obstruct the fluid in the medium main pipe 1, so that the medium can be diverted from the flow-blocking hole 6 into the flow-blocking cavity 7, instead of passing through the medium main pipe 1 directly.

[0043] The flow-blocking structure either completely encloses the main medium pipe 1 or leaves a flow-dividing gap. That is, the flow-blocking structure completely encloses the main medium pipe 1, and the medium flows only through the heat-collecting fins 2 without passing through the middle section of the main medium pipe 1. This method wastes the heat exchange area in the middle section of the main medium pipe 1. Alternatively, the flow-blocking structure does not completely enclose the main medium pipe 1; some of the medium still flows through the middle section of the main medium pipe 1 through the flow-dividing gap to absorb heat, achieving reasonable medium distribution and sufficient heat exchange.

[0044] The flow-blocking structure includes a flow-blocking protrusion 4 and a flow-blocking ball 5. The flow-blocking protrusion 4 is located on the main medium pipe 1 and the flow-blocking ball 5 is clamped along the front and back of the pipe. That is, the flow-blocking protrusion 4 is a protruding pipe wall pressed into the pipe. The protrusion limits the flow-blocking ball 5 from front to back, ensuring the flow-blocking effect of the ball under fluid impact. 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 main medium pipe 1, thus leaving a flow-dividing gap.

[0045] The middle part of the flow distribution cavity 7 is provided with an inner baffle 8 arranged along the pipe direction. The inner baffle 8 and the heat collection fin plate 2 are integral structures of the same material. The inner baffle 8 divides the middle part of the flow distribution cavity 7 into at least two unit cavities 9. In this example, there are two unit cavities 9. The unit cavities 9 further divide the medium in the flow distribution cavity 7 to ensure uniform and stable internal medium flow and ensure good heat transfer effect.

[0046] Example 2

[0047] refer to Figures 1-6 As shown, a medium-temperature solar collector includes a main inlet pipe 12 and a main outlet pipe 13, and also includes the medium-temperature solar collector module of Embodiment 1.

[0048] The main inlet pipe 12 and the main outlet pipe 13 are used for transporting cold and hot liquids, and they need to be insulated to reduce heat loss. The main inlet pipe 12 is connected to the inlet end of several medium main pipes 1, and the main outlet pipe 13 is connected to the outlet end of several medium main pipes 1. The cold liquid enters into the main inlet pipe 12, and then flows into several heat collection and insulation boxes 10. After absorbing heat in the medium main pipes 1, it converges again into the main outlet pipe 13.

[0049] The number of heat collection and insulation boxes 10 arranged between the main inlet pipe 12 and the main outlet pipe 13 can be flexibly adjusted to support capacity expansion or reduction as needed, adapting to dynamic changes in energy demand. Correspondingly, the length of the main pipe can also be extended or shortened section by section.

[0050] 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.

[0051] 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 medium temperature solar thermal collector module comprising a thermal collection and retention tank (10), characterised in that: The upper part of the heat collecting and heat preserving box (10) is provided with a glass cover plate (11), the heat collecting and heat preserving box (10) is internally provided with a medium main pipe (1), the two ends of the medium main pipe (1) respectively extend out of the heat collecting and heat preserving box (10), the side part of the medium main pipe (1) is provided with a heat collecting wing plate (2), the upper surface of the medium main pipe (1) and the heat collecting wing plate (2) is provided with a heat collecting blue film (3) opposite to the glass cover plate (11), the inlet end and the outlet end of the medium main pipe (1) are both provided with a shunt hole (6), the heat collecting wing plate (2) is internally provided with a shunt cavity (7) along the pipe direction, the two ends of the shunt hole (6) respectively communicate with the two ends of the shunt cavity (7), the medium main pipe (1) is internally provided with a resistance flow structure opposite to the shunt hole (6) along the flow direction.

2. The medium temperature solar thermal module of claim 1, wherein: The heat collecting and heat preserving box (10) is a cuboid with a U-shaped section.

3. The medium temperature solar thermal collector module according to claim 1 or 2, characterized in that: The heat collecting and heat preserving box (10) is made of PVC heat preserving material; the medium main pipe (1) and the heat collecting wing plate (2) are made of aluminum alloy material.

4. The medium temperature solar thermal module of claim 1, wherein: The two side parts of the medium main pipe (1) are both provided with the heat collecting wing plate (2), and the heat collecting wing plates (2) on the two side parts are symmetrically arranged.

5. The medium temperature solar thermal collector module of claim 1 or 4, wherein: The upper surface of the heat collecting wing plate (2) is a plane, the outer side of the lower surface of the heat collecting wing plate (2) is a plane, and the inner side of the lower surface of the heat collecting wing plate (2) is a convex platform.

6. The medium temperature solar thermal module of claim 1, wherein: The outer side of the heat collecting wing plate (2) is provided with a downward flange.

7. The medium temperature solar thermal collector module of claim 1, wherein: The resistance flow structure completely seals the medium main pipe (1) or leaves a shunt gap.

8. The medium temperature solar thermal collector module of claim 7, wherein: The resistance flow structure comprises a resistance flow convex (4) and a resistance flow ball (5), the resistance flow convex (4) is arranged on the medium main pipe (1) and clamps the resistance flow ball (5) along the pipe direction.

9. The medium temperature solar thermal collector module 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).

10. A medium temperature solar collector comprising a total inlet pipe (12) and a total outlet pipe (13), characterized in that: The application further comprises the medium temperature solar heat collecting module as claimed in any one of claims 1-9, a total inlet pipe (12) communicates with the inlet end of the medium main pipe (1), and a total outlet pipe (13) communicates with the outlet end of the medium main pipe (1).

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