An absorbing sheet capable of uniformly heating absorbing tubes
Patent Information
- Application Number
- CN202522398423.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-12
- Publication Date
- 2026-09-25
- Estimated Expiration
- 2035-11-12
AI Technical Summary
水垢会进一步恶化换热效率；与此同时，吸热管和吸热片本身也会因受热不均而产生巨大的热应力，长期运行下极易导致金属材料疲劳、变形甚至开裂，严重影响壁挂炉的使用寿命和可靠性
本实用新型结构简单、设计合理且经济效益高，通过优化吸热片的形状结构，缩短吸热片下边沿与安装孔的距离，以减少吸热片底部与高温烟气的热交换面积，对冲高温烟气的下热上冷的温度均布，进而重构吸热片的热量分布，以达到能使吸热管均匀受热的目的，解决吸热管受热不均与吸热管管内水液温度梯度大的问题。
Smart Images
Figure CN224802237U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of heat exchange equipment, and specifically refers to a heat-absorbing plate that can make the heat-absorbing tube uniformly heated. Background Technology
[0002] As a common household heating and hot water supply device, one of the core components of a wall-hung boiler is the heat exchanger located above the combustion chamber. This heat exchanger typically consists of multiple heat-absorbing tubes and a large number of heat-absorbing fins (or fins) connected in series on the heat-absorbing tubes. It is used to efficiently absorb the heat from the high-temperature flue gas generated by the combustion of gas and transfer it to the water medium inside the tubes.
[0003] During operation, high-temperature flue gas flows upwards through these densely arranged heat-absorbing fins. Because the flue gas temperature naturally decreases along the flow direction, this leads to an inherent technical challenge: the area at the bottom of the heat-absorbing fins comes into contact with the hottest flue gas first, while the top area comes into contact with the cooler flue gas after staged heat exchange. This strong vertical temperature gradient results in a significant difference in heat load between the upper and lower parts of the existing heat-absorbing fins. Specifically, the bottom of the heat-absorbing tube is constantly in a superheated state, which can cause a large amount of calcium and magnesium ions in the water inside the tube to precipitate, forming scale. Scale further degrades heat exchange efficiency. At the same time, the heat-absorbing tubes and fins themselves will generate enormous thermal stress due to uneven heating, which can easily lead to fatigue, deformation, or even cracking of the metal materials under long-term operation, seriously affecting the service life and reliability of the wall-hung boiler. Summary of the Invention
[0004] The purpose of this invention is to provide a heat-absorbing plate that can make the heat-absorbing tube heat-evenly heated. It has a simple structure, reasonable design and high economic efficiency. By optimizing the shape and structure of the heat-absorbing plate and shortening the distance between the lower edge of the heat-absorbing plate and the mounting hole, the heat exchange area between the bottom of the heat-absorbing plate and the high-temperature flue gas is reduced, thereby reconstructing the heat distribution of the heat-absorbing plate to achieve the purpose of making the heat-absorbing tube heat-evenly heated.
[0005] This utility model is implemented as follows: A heat-absorbing sheet capable of uniformly heating a heat-absorbing tube includes a heat-absorbing sheet body. The heat-absorbing sheet body has a row of equally spaced mounting holes for the heat-absorbing tube to pass through. The mounting holes are waist-shaped holes arranged vertically. The bottom surface of the heat-absorbing sheet body tapers upward along the arc-shaped bottom edge of each mounting hole to form a heat-reducing zone. The shortest distance between the arc-shaped top edge of the mounting hole and the outer edge of the heat-absorbing sheet body is greater than twice the shortest distance between the arc-shaped bottom edge of the mounting hole and the outer edge of the heat-absorbing sheet body. The shortest distance between the arc-shaped bottom edge of the mounting hole and the outer edge of the heat-absorbing sheet body is less than or equal to 2 mm. Two or more smoke guide baffles are distributed at equal vertical intervals between two adjacent mounting holes.
[0006] In the aforementioned heat-absorbing sheet that enables the heat-absorbing tube to be heated evenly, the smoke guide baffle includes a left-leaning smoke guide plate that is horizontally inclined to the left and a right-leaning smoke guide plate that is horizontally inclined to the right, with the left-leaning smoke guide plate and the right-leaning smoke guide plate being alternately distributed vertically.
[0007] In the above-mentioned heat-absorbing plate that enables the heat-absorbing tube to be heated evenly, the left-leaning smoke guide plate and the right-leaning smoke guide plate are both integral with the heat-absorbing plate body. The left-leaning smoke guide plate and the right-leaning smoke guide plate are both bent sheet metal bodies formed by cutting the metal of the heat-absorbing plate body. The upper end of the bent sheet metal body is a free end and bends forward, and the lower end is connected to the heat-absorbing plate body.
[0008] In the above-mentioned heat-absorbing sheet that enables the heat-absorbing tube to be heated evenly, a row of welding through holes corresponding one-to-one with the mounting holes are provided on the main body of the heat-absorbing sheet. The welding through holes allow the welding rod to pass through circumferentially and be fixed to the welding rod by welding. The welding through holes are located directly above the corresponding mounting holes and the center lines of the welding through holes and the corresponding mounting holes are on the same vertical plane.
[0009] In the above-mentioned heat-absorbing sheet that enables the heat-absorbing tube to be heated evenly, a smoke-blocking baffle is provided on the heat-absorbing sheet body located between two adjacent mounting holes. The smoke-blocking baffle is located above the smoke-guiding baffle and the mounting hole, and the smoke-blocking baffle extends forward from the upper edge of the heat-absorbing sheet body.
[0010] The outstanding advantages of this utility model compared to the prior art are: This utility model has a simple structure, reasonable design, and high economic benefits. By optimizing the shape and structure of the heat absorber, the distance between the lower edge of the heat absorber and the mounting hole is shortened, thereby reducing the heat exchange area between the bottom of the heat absorber and the high-temperature flue gas. This counteracts the uneven temperature distribution of the high-temperature flue gas, which is hot at the bottom and cold at the top, and reconstructs the heat distribution of the heat absorber to achieve the purpose of uniform heating of the heat absorber tube. This solves the problems of uneven heating of the heat absorber tube and large temperature gradient of the water inside the heat absorber tube. Attached Figure Description
[0011] Figure 1 This is a three-dimensional view of the heat-absorbing sheet of this utility model; Figure 2 This is a front view of the heat-absorbing sheet body of this utility model.
[0012] In the diagram: 1. Heat absorber body; 2. Mounting hole; 3. Heat reduction zone; 4. Left-leaning smoke guide plate; 5. Right-leaning smoke guide plate; 6. Welding through hole; 7. Smoke baffle; L1, the shortest distance between the arc-shaped top edge of the mounting hole and the outer edge of the heat absorber body; L2, the shortest distance between the arc-shaped bottom edge of the mounting hole and the outer edge of the heat absorber body. Detailed Implementation
[0013] The present invention will be further described below with reference to specific embodiments. See also: Figure 1 —2: A heat-absorbing plate that enables uniform heating of a heat-absorbing tube includes a heat-absorbing plate body 1. The heat-absorbing plate body 1 has a row of equally spaced mounting holes 2 for the heat-absorbing tube to pass through. The mounting holes 2 are waist-shaped holes arranged vertically. The bottom surface of the heat-absorbing plate body 1 tapers upward along the arc-shaped bottom edge of each mounting hole 2 to form a heat-reducing zone 3. The shortest distance L1 between the arc-shaped top edge of the mounting hole and the outer edge of the heat-absorbing plate body is greater than twice the shortest distance L2 between the arc-shaped bottom edge of the mounting hole and the outer edge of the heat-absorbing plate body. The shortest distance between the arc-shaped bottom edge of the mounting hole 2 and the outer edge of the heat-absorbing plate body 1 is less than or equal to 2 mm. There are two or more smoke guide baffles distributed at equal vertical intervals between two adjacent mounting holes 2 on the heat-absorbing plate body 1.
[0014] This utility model features a simple structure, reasonable design, and high economic efficiency. By optimizing the shape and structure of the heat-absorbing plate body 1 and shortening the distance between the lower edge of the heat-absorbing plate body 1 and the mounting hole 2, the heat exchange area between the bottom of the heat-absorbing plate body 1 and the high-temperature flue gas is reduced. This counteracts the bottom-heating and top-cooling temperature distribution of the high-temperature flue gas, thereby reconstructing the heat distribution of the heat-absorbing plate body 1. This achieves the goal of uniform heating of the heat-absorbing tube, solving the problems of uneven heating of the heat-absorbing tube and large temperature gradient of the water inside the heat-absorbing tube. Compared with the prior art, this utility model, due to the uniform heating of the heat-absorbing plate body 1 and the heat-absorbing tube from top to bottom, greatly reduces the thermal stress caused by excessive temperature difference, effectively preventing deformation, fatigue, and cracking of the heat-absorbing plate body 1 and the heat-absorbing tube, and improving the service life and reliability of the wall-hung boiler.
[0015] Meanwhile, to allow the high-temperature flue gas to rise slowly and fully exchange heat with the heat absorber body 1, the smoke guide baffle includes a left-leaning smoke guide plate 4 inclined to the left horizontally and a right-leaning smoke guide plate 5 inclined to the right horizontally, with the left-leaning smoke guide plate 4 and the right-leaning smoke guide plate 5 alternately distributed vertically. Furthermore, in this embodiment, both the left-leaning smoke guide plate 4 and the right-leaning smoke guide plate 5 are integrally formed with the heat absorber body 1. Both the left-leaning smoke guide plate 4 and the right-leaning smoke guide plate 5 are bent sheet metal bodies formed by cutting metal from the heat absorber body 1. The upper end of the bent sheet metal body is a free end that bends forward, and the lower end is connected to the heat absorber body 1.
[0016] In order to form an integral structure by connecting the heat-absorbing plate bodies 1 in series with the heat-absorbing tube, that is, to fix the position of several heat-absorbing plate bodies 1 stacked in front and behind, so as to keep the temperature distribution of the high-temperature flue gas flowing from bottom to top stable, a row of welding through holes 6 corresponding one-to-one with the mounting holes 2 is opened on the heat-absorbing plate body 1. The welding through holes 6 provide a fixed channel for the welding rod to pass through circumferentially and be fixed to the welding rod by welding. The welding through holes 6 are located directly above the corresponding mounting holes 2 and the axis of the welding through holes 6 and the corresponding mounting holes 2 are on the same vertical plane.
[0017] Meanwhile, in order to further slow down the flow of high-temperature flue gas and increase the heat exchange area between the heat absorber body 1 and the high-temperature flue gas, a smoke-blocking baffle 7 is provided on the heat absorber body 1 located between two adjacent mounting holes 2. The smoke-blocking baffle 7 is located above the smoke guide baffle and the mounting hole 2, and the smoke-blocking baffle 7 extends forward from the upper edge of the heat absorber body 1.
[0018] The above embodiments are only one of the preferred embodiments of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes made in accordance with the shape, structure and principle of this utility model should be covered within the protection scope of this utility model.
Claims
1. A heat-absorbing sheet capable of uniformly heating a heat-absorbing tube, comprising a heat-absorbing sheet body (1), wherein the heat-absorbing sheet body (1) is provided with a row of equally spaced mounting holes (2) for the heat-absorbing tube to pass through, characterized in that: The mounting hole (2) is a waist-shaped hole structure set vertically. The bottom surface of the heat absorber body (1) is reduced upward along the arc-shaped bottom edge of each mounting hole (2) to form a heat reduction zone (3). The shortest distance (L1) between the arc-shaped top edge of the mounting hole and the outer edge of the heat absorber body is greater than twice the shortest distance (L2) between the arc-shaped bottom edge of the mounting hole and the outer edge of the heat absorber body. The shortest distance between the arc-shaped bottom edge of the mounting hole (2) and the outer edge of the heat absorber body (1) is less than or equal to 2 mm. There are two or more smoke guide baffles distributed at equal intervals between two adjacent mounting holes (2).
2. The heat-absorbing sheet according to claim 1, which enables the heat-absorbing tube to be heated uniformly, is characterized in that: The smoke guide baffle includes a left-leaning smoke guide plate (4) that is horizontally inclined to the left and a right-leaning smoke guide plate (5) that is horizontally inclined to the right, with the left-leaning smoke guide plate (4) and the right-leaning smoke guide plate (5) being alternately distributed vertically.
3. A heat-absorbing sheet according to claim 2, characterized in that: The left-leaning smoke guide plate (4) and the right-leaning smoke guide plate (5) are both integral with the heat absorber body (1). The left-leaning smoke guide plate (4) and the right-leaning smoke guide plate (5) are both bent sheet metal bodies formed by cutting the heat absorber body (1) from metal. The upper end of the bent sheet metal body is a free end and bends forward, while the lower end is connected to the heat absorber body (1).
4. A heat-absorbing sheet according to claim 1, characterized in that: The heat-absorbing plate body (1) has a row of welding through holes (6) that correspond one-to-one with the mounting holes (2). The welding through holes (6) are fixed channels through which the welding rod passes circumferentially and is fixed to the welding rod by welding. The welding through holes (6) are located directly above the corresponding mounting holes (2) and the axis of the welding through holes (6) and the corresponding mounting holes (2) are on the same vertical plane.
5. A heat-absorbing sheet according to claim 1, characterized in that: A smoke-blocking baffle (7) is provided on the heat-absorbing sheet body (1) located between two adjacent mounting holes (2). The smoke-blocking baffle (7) is located above the smoke guide baffle and the mounting hole (2), and the smoke-blocking baffle (7) is formed by extending forward from the upper edge of the heat-absorbing sheet body (1).