Improved solar heat collecting tube structure

Abstract

The utility model relates to solar water heater component technical field especially relates to an improved solar heat collecting pipe structure, including light -transmitting outer tube, the heat absorbing inner tube of setting in the middle part of light -transmitting outer tube inside, the selective absorption coating of coating in the heat absorbing inner tube outside and the heat pipe of detachable installation in the heat absorbing inner tube inside through fixed plug, the heat collecting part of setting between light -transmitting outer tube, heat absorbing inner tube and heat pipe has comprehensively promoted solar heat collecting pipe heat absorption and heat conducting effect. In the utility model, the heat conducting wire net and heat conducting support seat are arranged between the heat absorbing inner tube and the heat pipe, and a mirror surface reflecting layer is arranged on the light-transmitting outer tube, sunlight can be reflected to the lower side of the heat absorbing inner tube through the mirror surface, the contact area between sunlight and the heat absorbing inner tube is effectively increased, and the heat loss of heat transfer between the heat absorbing inner tube and the heat pipe is effectively reduced, so that the heat efficiency of the solar heat collector is comprehensively improved.

Description

Technical Field

[0001] This utility model relates to the field of solar water heater component technology, and in particular to an improved solar collector tube structure. Background Technology

[0002] Solar vacuum tube collectors are the core components of solar thermal utilization devices. They consist of inner and outer glass tubes, a selective absorption coating, and a vacuum jacket, and are divided into two categories: all-glass vacuum tubes and glass-metal vacuum tubes. In 2020, vacuum tube collectors accounted for 74.3% of the Chinese solar collector market. Technological development includes the optimization of U-tube and heat pipe structures, as well as the research and development of coating materials and heat transfer media.

[0003] Most solar collector tubes on the market currently rely on a selective absorption coating on the inner heat-absorbing tube to absorb solar heat. This heat is then used to heat the heat-conducting tube inside the inner tube. The heat transfer medium inside the heat-conducting tube then conducts heat to the water in the water heater tank. However, this type of solar collector tube structure has the following drawbacks in actual use: Due to the limited contact area between sunlight and the inner heat-absorbing tube, and because the inner heat-absorbing tube heats the heat-conducting tube primarily through air heat, heat loss during absorption and conduction is significant. This makes it difficult to efficiently absorb and transfer solar heat, resulting in poor thermal efficiency of the solar water heater.

[0004] In view of this, it is particularly important to design and manufacture a solar collector tube structure that can reuse sunlight and improve the heat transfer effect of the heat-absorbing inner tube to the heat-conducting tube for application in solar water heaters. Utility Model Content

[0005] The purpose of this utility model is to solve the problems of low utilization rate of sunlight and large heat loss during the heat absorption and conduction process of the previous generation of solar collector tube structure in the existing technology, and to propose an improved solar collector tube structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: An improved solar collector tube structure includes a light-transmitting outer tube, a heat-absorbing inner tube disposed in the middle of the inner side of the light-transmitting outer tube, a selective absorption coating coated on the outside of the heat-absorbing inner tube, and a heat-conducting tube detachably installed inside the heat-absorbing inner tube by a fixing buckle. A heat-collecting part is provided between the light-transmitting outer tube, the heat-absorbing inner tube, and the heat-conducting tube to comprehensively improve the heat absorption and heat conduction effects of the solar collector tube.

[0007] As a further description of the above technical solution: The heat collection unit includes a heat-conducting wire mesh fixed inside the heat-absorbing inner tube and distributed in a horizontal and vertical grid pattern, and heat-conducting support seats equidistantly installed outside the heat-conducting tube and inside the heat-absorbing inner tube, abutting against the heat-conducting wire mesh.

[0008] As a further description of the above technical solution: The heat collection unit also includes a mirror-reflective layer coated inside the light-transmitting outer tube and located below the heat-absorbing inner tube.

[0009] As a further description of the above technical solution: Both the heat-conducting wire mesh and the heat-conducting support base are made of copper.

[0010] As a further description of the above technical solution: The mirror-reflective layer is made of a thin aluminum film.

[0011] As a further description of the above technical solution: A sealing end seat is fixedly connected between the two ends of the light-transmitting outer tube and the heat-absorbing inner tube, and a vacuum insulation cavity is formed between the light-transmitting outer tube, the heat-absorbing inner tube and the sealing end seat through a vacuum process.

[0012] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: In this invention, the original solar collector tube structure has been scientifically and rationally improved. A heat-conducting mesh and a heat-conducting support are installed between the heat-absorbing inner tube and the heat-conducting tube. At the same time, a mirror-reflective layer is installed on the light-transmitting outer tube. The mirror-reflective layer can reflect sunlight that enters the light-transmitting outer tube and is not blocked by the heat-absorbing inner tube to the bottom of the heat-absorbing inner tube, thereby increasing the contact area between the heat-absorbing inner tube and sunlight. This allows the solar heat to be transferred to the interior of the heat-absorbing inner tube from multiple directions. After the heat-absorbing inner tube absorbs heat, the heat-conducting mesh inside the heat-absorbing inner tube can quickly absorb the heat and transfer it inward in a surface formation. Some of the heat is directly and efficiently conducted to the heat-conducting tube through multiple heat-conducting supports, providing comprehensive heating treatment to the heat-conducting tube from multiple directions. This structure can reflect sunlight to the bottom of the heat-absorbing inner tube through the mirror, effectively increasing the contact area between sunlight and the heat-absorbing inner tube, and effectively reducing the heat loss between the heat-absorbing inner tube and the heat-conducting tube, thereby comprehensively improving the thermal efficiency of the solar collector. Attached Figure Description

[0013] Figure 1 This is a simplified structural diagram of an improved solar collector tube structure proposed in this utility model; Figure 2 This is a three-dimensional disassembly diagram of the present invention; Figure 3 This is a schematic diagram of the axial sectioning process of this utility model; Figure 4This is a partial 90° cross-sectional view of the present invention.

[0014] Legend: 1. Transparent outer tube; 101. Mirror reflective layer; 2. Heat-absorbing inner tube; 201. Selective absorption coating; 202. Heat-conducting wire mesh; 3. Sealing end seat; 4. Heat-conducting pipe; 401. Fixing buckle; 402. Heat-conducting support seat; 5. Vacuum insulation cavity. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-4 This utility model provides a technical solution: an improved solar collector tube structure, including a light-transmitting outer tube 1, a heat-absorbing inner tube 2 disposed in the middle of the inner side of the light-transmitting outer tube 1, a selective absorption coating 201 coated on the outside of the heat-absorbing inner tube 2, and a heat-conducting tube 4 detachably installed inside the heat-absorbing inner tube 2 by a fixing buckle 401. A heat-collecting part is provided between the light-transmitting outer tube 1, the heat-absorbing inner tube 2 and the heat-conducting tube 4 to comprehensively improve the heat absorption and heat conduction effect of the solar collector tube.

[0017] Specifically, such as Figure 2-4 As shown, the heat collection unit includes a heat-conducting wire mesh 202 fixed inside the heat-absorbing inner tube 2 and distributed in a horizontal and vertical grid pattern, and a heat-conducting support base 402 equidistantly installed outside the heat-conducting pipe 4 and inside the heat-absorbing inner tube 2 and abutting against the heat-conducting wire mesh 202.

[0018] The heat-conducting wire mesh 202 and the heat-conducting support base 402 are both made of copper, which gives them good heat absorption and heat conduction effects, effectively reducing heat loss during heat transfer and thus improving the thermal efficiency of heat conduction.

[0019] Specifically, such as Figure 3 As shown, the heat collection unit also includes a mirror reflective layer 101 coated inside the light-transmitting outer tube 1 and located below the heat-absorbing inner tube 2. The mirror reflective layer 101 is made of aluminum film and can efficiently reflect sunlight entering below the light-transmitting outer tube 1, and then irradiate and heat the shaded side of the heat-absorbing inner tube 2.

[0020] Specifically, such as Figure 3 and Figure 4As shown, a sealing end seat 3 is fixedly connected between the two ends of the light-transmitting outer tube 1 and the heat-absorbing inner tube 2. This seals and fixes the connection between the two ends of the light-transmitting outer tube 1 and the heat-absorbing inner tube 2, ensuring that the light-transmitting outer tube 1 and the heat-absorbing inner tube 2 can be stably sealed and fixed. A vacuum insulation cavity 5 is formed between the light-transmitting outer tube 1, the heat-absorbing inner tube 2 and the sealing end seat 3 through vacuuming. This can effectively reduce the heat loss of the heat-absorbing inner tube 2, thereby reducing the heat loss of the solar collector tube and improving the thermal efficiency of the solar collector tube.

[0021] Working principle: During use, sunlight enters through the light-transmitting outer tube 1. Most of the solar heat is absorbed by the selective absorption coating 201. Meanwhile, the sunlight blocked by the heat-absorbing inner tube 2 continues to move downwards from the light-transmitting outer tube 1 and is then emitted through the mirror reflective layer 101 on the light-transmitting outer tube 1. The sunlight then evenly illuminates the heat-absorbing inner tube 2, which can then transfer the heat absorbed by the sunlight inwards. The heat-conducting wire mesh 202 inside the heat-absorbing inner tube 2 can quickly absorb the heat absorbed by the heat-absorbing inner tube 2 and transfer the locally absorbed heat inwards in a surface form, heating the medium between the heat-absorbing inner tube 2 and the heat-conducting pipe 4. At the same time, another part of the heat is directly and quickly conducted inwards to the heat-conducting pipe 4 through the heat-conducting support 402, performing multi-point conduction heating on the heat-conducting pipe 4, thereby improving the thermal efficiency of the solar collector tube and reducing the heat loss during the operation of the solar collector tube.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An improved solar collector tube structure, comprising a light-transmitting outer tube (1), a heat-absorbing inner tube (2) disposed in the middle of the inner side of the light-transmitting outer tube (1), a selective absorption coating (201) coated on the outside of the heat-absorbing inner tube (2), and a heat-conducting tube (4) detachably installed inside the heat-absorbing inner tube (2) via a fixing buckle (401), characterized in that, A heat collection section is provided between the light-transmitting outer tube (1), the heat-absorbing inner tube (2), and the heat-conducting tube (4) to comprehensively improve the heat absorption and heat conduction effects of the solar collector tube.

2. The improved solar collector tube structure according to claim 1, characterized in that, The heat collection unit includes a heat-conducting wire mesh (202) fixed inside the heat-absorbing inner tube (2) and distributed in a horizontal and vertical grid pattern, and a heat-conducting support base (402) equidistantly installed outside the heat-conducting tube (4) and inside the heat-absorbing inner tube (2) and abutting against the heat-conducting wire mesh (202).

3. The improved solar collector tube structure according to claim 2, characterized in that, The heat collection part also includes a mirror reflective layer (101) coated inside the light-transmitting outer tube (1) and located below the heat-absorbing inner tube (2).

4. The improved solar collector tube structure according to claim 2, characterized in that, Both the heat-conducting wire mesh (202) and the heat-conducting support base (402) are made of copper.

5. The improved solar collector tube structure according to claim 3, characterized in that, The mirror reflective layer (101) is made of aluminum film.

6. The improved solar collector tube structure according to claim 1, characterized in that, A sealing end seat (3) is fixedly connected between the two ends of the light-transmitting outer tube (1) and the heat-absorbing inner tube (2). A vacuum insulation cavity (5) is formed between the light-transmitting outer tube (1), the heat-absorbing inner tube (2) and the sealing end seat (3) through vacuuming.

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