Efficient heat exchange inner fin and machining method thereof

Abstract

The invention belongs to the technical field of inner fins, and discloses an efficient heat exchange inner fin and a processing method thereof.According to the efficient heat exchange inner fin and the processing method thereof, through the elaborately-designed wavy fin body, the contact area with air is increased, the resistance of air flowing is minimized, and therefore the heat exchange efficiency is remarkably improved; a layer of uniform and compact protective film is formed through anodic oxidation treatment, the corrosion resistance of the fin is greatly improved, the stability in long-term use is ensured, the surface roughness is reduced through high-speed polishing treatment on the surface of the fin, the air resistance is further reduced, the aerodynamic performance is improved, and the service life of the fin is prolonged. The high-precision laser cutting and rolling forming technology is adopted, the precise shape and size of the fin are ensured, the overall flatness error is ensured to be within the qualified range through straightening of a straightening machine, oxidation is avoided through application of the vacuum welding technology, and the quality and strength of a welded joint are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of inner fins, and in particular relates to an inner fin with high-efficiency heat exchange and a processing method thereof. Background Art

[0002] The inner fin is a highly efficient heat exchange element, usually used to enhance the heat transfer performance in the heat exchange tube. The fins used in the inner fin tube are completely welded to the inner wall of the outer tube through the brazing process, ensuring efficient heat transfer performance. According to different design requirements and media, the inner fin tube can be made into a composite tube of all copper, all stainless steel, or stainless steel outer tube and copper inner fin.

[0003] The prior art discloses some invention patents in the field of internal fin processing technology, among which the invention patent with application number 201610669738.6 discloses a heat exchange fin for an air conditioner heat exchanger, including a copper tube and a first heat exchange fin and a second heat exchange fin arranged on the outer surface of the copper tube, wherein the second heat exchange fin includes a square sheet and a groove sheet. Through the design of the first heat exchange fin and the second heat exchange fin, the heat exchange efficiency is improved by increasing the contact area with the air. The copper-aluminum alloy has high heat exchange efficiency and low cost, and is very practical. It is suitable for promotion and use. It has a compact structure and more efficiently utilizes the narrow space in the air conditioner. The processing and assembly precision is high to ensure product quality. It is corrected by a straightening machine so that the overall flatness error is within the qualified range. The slag is removed by oil, and the slag removal efficiency is high. In terms of the preparation method, the process is simple, the raw material source is wide, and the production cost is low. The heat exchange fin for an air conditioner heat exchanger and its preparation method have the advantages of reasonable structural design and simple operation, and can be widely promoted and used.

[0004] However, the above method still has the following defects in actual use: although it can improve the accuracy of processing and assembly and make its overall flatness more appropriate, the heat exchange efficiency of the above inner fins is low and the corrosion resistance is poor. Long-term use may cause performance degradation, and the design of the inner fins may not fully consider aerodynamic factors, resulting in greater air resistance. Summary of the invention

[0005] The object of the present invention is to provide an inner fin with high efficiency in heat exchange and a processing method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: an internal fin with high-efficiency heat exchange and a processing method thereof, comprising a fin outer body, the outer surface of the fin outer body is overlapped with a grid concave plate, a limiting structure is fixedly connected inside the grid concave plate, a locking structure is fixedly connected to the front side of the fin outer body, the locking structure is overlapped with the limiting structure, and T-slots are provided on both sides of the fin outer body. The limiting structure is snapped into the T-slot, a groove is provided on the front side of the fin outer body, and a plurality of wavy fin bodies are fixedly connected to the top of the fin outer body.

[0007] As a further solution of the present invention: the limiting structure includes two T-blocks and bolts, the two T-blocks are fixedly connected inside the fin outer body, and a mounting plate is fixedly connected between the two T-blocks.

[0008] As a further solution of the present invention: the bolt is fixedly connected to the front side of the mounting plate, the outer surface of the bolt is threadedly connected with a nut, the T-block is clamped in the T-slot, and the mounting plate is clamped in the outer body of the fin.

[0009] As a further solution of the present invention: the locking structure includes a rotating plate and a fixing column, the fixing column is fixedly connected to the front side of the fin outer body, the fixing column is rotated outward to be connected with the rotating plate, the bolt is clamped in the rotating plate, and the bolt is connected to the rotating plate through a nut.

[0010] As a further solution of the present invention: a slot is provided on one side of the rotating plate, and a fixing plate is fixedly connected to one end of the rotating plate.

[0011] As a further solution of the present invention: a coil spring is connected to the outer shell of the fixing column, and the fixing disk is connected to the rotating plate through the coil spring.

[0012] A method for processing an inner fin with high efficiency heat exchange, the processing method comprising the following steps:

[0013] S1 Material preparation: Carefully select 1.2mm thick titanium alloy plates. This material is selected for its excellent thermal conductivity and corrosion resistance to ensure the performance and life of the heat exchange fins in long-term use. The selected titanium alloy plates are thoroughly cleaned to remove oil, dust and other impurities on the surface. The cleaning process may include chemical cleaning and ultrasonic cleaning. After cleaning, the titanium alloy plates are placed in a drying oven and dried at a set temperature and time to ensure that the plates are completely dry in preparation for subsequent processing.

[0014] S2 fin design and cutting:

[0015] Design detailed drawings of the corrugated fins to ensure that the corrugated shape of the fins can maximize the heat exchange area while minimizing the resistance to air flow. Use a high-precision laser cutting machine to accurately cut the corrugated fins on the titanium alloy sheet according to the design drawings. Laser cutting can provide smooth cutting edges and reduce the need for subsequent processing.

[0016] S3 fin molding:

[0017] Use a special roll-forming machine to form the cut wavy fins so that they fit tightly onto the outer surface of the copper tube. During the forming process, the rolling force and speed are strictly controlled to ensure uniform and tight contact between the fins and the copper tube, thereby improving heat exchange efficiency.

[0018] S4 Surface Treatment:

[0019] The formed fins are anodized to form a uniform and dense oxide film. This protective film can effectively improve the corrosion resistance of the fins.

[0020] The fin surface is polished using a high-speed polishing machine to reduce surface roughness, thereby reducing air resistance and improving aerodynamic performance.

[0021] S5 assembly and welding:

[0022] The fins and copper tubes are welded together using vacuum welding technology in an oxygen-free environment, which avoids oxidation and ensures the quality and strength of the welded joints.

[0023] Continuous welding technology is used during the welding process to reduce the number of welding points, thereby improving the overall strength and sealing of the fins

[0024] S6 quality inspection:

[0025] The welded fins are pressure tested to check their sealing performance and ensure there is no leakage under high pressure.

[0026] Use professional heat transfer efficiency testing equipment to test the heat transfer performance of the fins to ensure that it meets the design requirements.

[0027] S7 Cleaning and Packaging:

[0028] Using ultrasonic cleaning technology, the fin surface is deeply cleaned to remove oil, polishing residues and other tiny impurities.

[0029] The cleaned and dried fins are packed with anti-corrosion packaging materials to protect the fins from damage during storage and transportation, ready for final installation and use.

[0030] The beneficial effects of the present invention are as follows:

[0031] 1. The present invention not only increases the contact area with the air but also minimizes the resistance to air flow through the carefully designed wavy fin body, thereby significantly improving the heat exchange efficiency. A 1.2 mm thick titanium alloy plate is selected and anodized to form a uniform and dense protective film, which greatly improves the corrosion resistance of the fin and ensures its stability in long-term use. The surface roughness is reduced by high-speed polishing of the fin surface, further reducing the air resistance and improving the aerodynamic performance. High-precision laser cutting and roll forming technology are used to ensure the precise shape and size of the fin. The straightening machine is used to correct the overall flatness error within the qualified range. The application of vacuum welding technology avoids oxidation and improves the quality and strength of the welded joint. The continuous welding technology reduces the number of welding points and enhances the overall strength and sealing of the fin. The preparation method of the present invention does not require injection molding, has a simple process, is easy to operate, has a wide source of raw materials, low production cost, and is suitable for large-scale production.

[0032] 2. The present invention applies thrust to the rotating plate through a limiting structure and a locking structure, and the rotating plate will rotate on the surface of the fixed column. When the rotating plate rotates, it will drive the coil spring to deform through the fixed disk, and then the grid concave plate will fit with the fin outer body through horizontal movement, and the grid concave plate will slide in the T-slot through the internal T-block. When the mounting plate is completely fitted with the groove, the rotating plate is released, and the rotating plate will be reset by the action of the coil spring. The reset rotating plate will overlap with the bolt through the slot, and then the bolt and the nut will be threaded and the rotating plate will be locked, so that the grid concave plate can be assembled with the surface of the fin outer body, and the wavy fin body can be in a clean state. The clean wavy fin body can reduce thermal resistance, improve heat exchange efficiency, thereby improving the performance of the entire system, reducing corrosion and wear of the wavy fin body, and extending the service life of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the present invention;

[0034] Figure 2 It is a schematic diagram of the explosion of the grid concave plate of the present invention;

[0035] Figure 3 It is a schematic diagram of the outer body of the fin of the present invention;

[0036] Figure 4 For the present invention Figure 1 A is an enlarged schematic diagram.

[0037] In the figure: 1. fin outer body; 2. grid concave plate; 3. limiting structure; 301. T-block; 302. mounting plate; 303. bolt; 304. nut; 4. locking structure; 401. rotating plate; 402. fixing column; 403. slot; 404. fixing plate; 405. coil spring; 5. T-slot; 6. groove; 7. wavy fin body. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] like Figures 1 to 4 As shown, the embodiment of the present invention provides an inner fin with high efficiency in heat exchange and a processing method thereof, including a fin outer body 1, the outer surface of the fin outer body 1 is overlapped with a grid concave plate 2, a limiting structure 3 is fixedly connected inside the grid concave plate 2, a locking structure 4 is fixedly connected to the front of the fin outer body 1, the locking structure 4 overlaps the limiting structure 3, and T-slots 5 are provided on both sides of the fin outer body 1. The limiting structure 3 is clamped in the T-slot 5, a groove 6 is provided on the front of the fin outer body 1, and a plurality of wavy fin bodies 7 are fixedly connected above the fin outer body 1. The limiting structure 3 includes two T-blocks 301 and bolts 303, and the two A T-block 301 is fixedly connected to the inside of the fin outer body 1, a mounting plate 302 is fixedly connected between the two T-blocks 301, a bolt 303 is fixedly connected to the front of the mounting plate 302, a nut 304 is threadedly connected to the outer surface of the bolt 303, the T-block 301 is clamped in the T-slot 5, the mounting plate 302 is clamped into the fin outer body 1, the locking structure 4 includes a rotating plate 401 and a fixing column 402, the fixing column 402 is fixedly connected to the front of the fin outer body 1, the fixing column 402 is rotated outward to be connected with the rotating plate 401, the bolt 303 is clamped in the rotating plate 401, and the bolt 303 is connected to the rotating plate 401 through the nut 304;

[0040] By setting the bolts 303 and the nuts 304, when the mounting plate 302 is fully fitted with the groove 6, the rotating plate 401 is loosened, and the rotating plate 401 is reset by the action of the coil spring 405. The reset rotating plate 401 is overlapped with the bolts 303 through the slots 403, and the nuts 304 are in contact with the rotating plate 401 after being fixed with the bolts 303, so that the grid concave plate 2 is locked to avoid loosening of the grid concave plate 2 after installation, and the grid concave plate 2 can be easily replaced or repaired later.

[0041] A slot 403 is provided on one side of the rotating plate 401, a fixed plate 404 is fixedly connected to one end of the rotating plate 401, a coil spring 405 is connected to the outer sleeve of the fixing column 402, and the fixing plate 404 is connected to the rotating plate 401 through the coil spring 405;

[0042] By setting the T-slot 5 and the groove 6, when the grid concave plate 2 is fitted with the fin outer body 1 by horizontal movement, the grid concave plate 2 will slide in the T-slot 5 through the internal T-block 301, and the mounting plate 302 will be completely fitted with the groove 6, so that the T-slot 5 and the groove 6 play a certain limiting role in the fixation of the grid concave plate 2, thereby avoiding the phenomenon of position displacement of the grid concave plate 2 when it is fixed.

[0043] A method for processing an inner fin with high efficiency heat exchange, the processing method comprising the following steps:

[0044] S1 Material preparation: Carefully select 1.2mm thick titanium alloy plates. This material is selected for its excellent thermal conductivity and corrosion resistance to ensure the performance and life of the heat exchange fins in long-term use. The selected titanium alloy plates are thoroughly cleaned to remove oil, dust and other impurities on the surface. The cleaning process may include chemical cleaning and ultrasonic cleaning. After cleaning, the titanium alloy plates are placed in a drying oven and dried at a set temperature and time to ensure that the plates are completely dry in preparation for subsequent processing.

[0045] The good corrosion resistance of titanium alloy enables the fins to maintain stable performance under a variety of environmental conditions, including environments with high humidity or corrosive gases. The durability of titanium alloy means longer product life, reduced replacement frequency and waste generation, which is beneficial to environmental protection.

[0046] S2 fin design and cutting:

[0047] Design detailed drawings of the corrugated fins to ensure that the corrugated shape of the fins can maximize the heat exchange area while minimizing the resistance to air flow. Use a high-precision laser cutting machine to accurately cut the corrugated fins on the titanium alloy sheet according to the design drawings. Laser cutting can provide smooth cutting edges and reduce the need for subsequent processing.

[0048] S3 fin molding:

[0049] Use a special roll-forming machine to form the cut wavy fins so that they fit tightly onto the outer surface of the copper tube. During the forming process, the rolling force and speed are strictly controlled to ensure uniform and tight contact between the fins and the copper tube, thereby improving heat exchange efficiency.

[0050] S4 Surface Treatment:

[0051] The formed fins are anodized to form a uniform and dense oxide film. This protective film can effectively improve the corrosion resistance of the fins.

[0052] The fin surface is polished using a high-speed polishing machine to reduce surface roughness, thereby reducing air resistance and improving aerodynamic performance.

[0053] The corrosion resistance and smoothness of the fins are improved through anodizing and polishing, the frequency of maintenance and cleaning is reduced, and the dense oxide film protects the fins from wear and corrosion, significantly extending the service life of the fins.

[0054] S5 assembly and welding:

[0055] The fins and copper tubes are welded together using vacuum welding technology in an oxygen-free environment, which avoids oxidation and ensures the quality and strength of the welded joints.

[0056] Continuous welding technology is used during the welding process to reduce the number of welding points, thereby improving the overall strength and sealing of the fins

[0057] S6 quality inspection:

[0058] The welded fins are pressure tested to check their sealing performance and ensure there is no leakage under high pressure.

[0059] Use professional heat transfer efficiency testing equipment to test the heat transfer performance of the fins to ensure that it meets the design requirements.

[0060] S7 Cleaning and Packaging:

[0061] Using ultrasonic cleaning technology, the fin surface is deeply cleaned to remove oil, polishing residues and other tiny impurities.

[0062] The cleaned and dried fins are packed with anti-corrosion packaging materials to protect the fins from damage during storage and transportation, ready for final installation and use.

[0063] The fins are protected from damage during transportation and storage by anti-corrosion packaging materials, ensuring the quality of product delivery. The cleaning and packaging process ensures that the fins are ready for installation when they reach the customer, saving on-site preparation time.

[0064] The working principle of the present invention is as follows: when the inner fin is in use, a thrust can be applied to the rotating plate 401, and the rotating plate 401 will rotate on the surface of the fixed column 402. When the rotating plate 401 rotates, it will drive the coil spring 405 to deform through the fixed disk 404, and then the grid concave plate 2 will fit with the fin outer body 1 by horizontal movement, and the grid concave plate 2 will slide in the T-slot 5 through the internal T-block 301. When the mounting plate 302 is completely fitted with the groove 6, the rotating plate 401 is released, and the rotating plate 401 is reset by the action of the coil spring 405. After the reset, the rotating plate 401 will overlap with the bolt 303 through the slot 403, and then the bolt 303 is threadedly connected with the nut 304 to lock the rotating plate 401.

[0065] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An inner fin with high efficiency heat exchange, comprising a fin outer body (1), characterized in that: The outer surface of the fin outer body (1) is overlapped with a grid recessed plate (2), a limiting structure (3) is fixedly connected inside the grid recessed plate (2), a locking structure (4) is fixedly connected to the front side of the fin outer body (1), the locking structure (4) is overlapped with the limiting structure (3), and T-shaped grooves (5) are provided on both sides of the fin outer body (1). The limiting structure (3) is snapped into the T-shaped groove (5), a groove (6) is provided on the front side of the fin outer body (1), and a plurality of wavy fin bodies (7) are fixedly connected to the top of the fin outer body (1).

2. The high-efficiency heat exchange inner fin according to claim 1, characterized in that: The limiting structure (3) comprises two T-shaped blocks (301) and bolts (303); the two T-shaped blocks (301) are fixedly connected inside the fin outer body (1); and a mounting plate (302) is fixedly connected between the two T-shaped blocks (301).

3. The high-efficiency heat exchange inner fin according to claim 2, characterized in that: The bolt (303) is fixedly connected to the front side of the mounting plate (302), the outer surface of the bolt (303) is threadedly connected with a nut (304), the T-block (301) is clamped in the T-slot (5), and the mounting plate (302) is clamped in the fin outer body (1).

4. The high-efficiency heat exchange inner fin according to claim 2, characterized in that: The locking structure (4) comprises a rotating plate (401) and a fixing column (402), wherein the fixing column (402) is fixedly connected to the front side of the fin outer body (1), the fixing column (402) is rotated outward to be connected to the rotating plate (401), the bolt (303) is clamped in the rotating plate (401), and the bolt (303) is connected to the rotating plate (401) via a nut (304).

5. The high-efficiency heat exchange inner fin according to claim 4, characterized in that: A slot (403) is provided on one side of the rotating plate (401), and a fixing plate (404) is fixedly connected to one end of the rotating plate (401).

6. The high-efficiency heat exchange inner fin according to claim 5, characterized in that: The fixing column (402) is outer-mounted with a coil spring (405), and the fixing disk (404) is connected to the rotating plate (401) via the coil spring (405).

7. A method for processing an inner fin with high efficiency heat exchange, according to the inner fin with high efficiency heat exchange according to any one of claims 1 to 6, characterized in that: The processing method comprises the following steps: S1 Material preparation: Carefully select 1.2mm thick titanium alloy plates. This material is selected for its excellent thermal conductivity and corrosion resistance to ensure the performance and life of the heat exchange fins in long-term use. The selected titanium alloy plates are thoroughly cleaned to remove oil, dust and other impurities on the surface. The cleaning process may include chemical cleaning and ultrasonic cleaning. After cleaning, the titanium alloy plates are placed in a drying oven and dried at a set temperature and time to ensure that the plates are completely dry in preparation for subsequent processing. S2 fin design and cutting: Design detailed drawings of the corrugated fins to ensure that the corrugated shape of the fins can maximize the heat exchange area while minimizing the resistance to air flow. Use a high-precision laser cutting machine to accurately cut the corrugated fins on the titanium alloy sheet according to the design drawings. Laser cutting can provide smooth cutting edges and reduce the need for subsequent processing. S3 fin molding: Use a special roll-forming machine to form the cut wavy fins so that they fit tightly onto the outer surface of the copper tube. During the forming process, the rolling force and speed are strictly controlled to ensure uniform and tight contact between the fins and the copper tube, thereby improving heat exchange efficiency. S4 Surface Treatment: The formed fins are anodized to form a uniform and dense oxide film. This protective film can effectively improve the corrosion resistance of the fins. The fin surface is polished using a high-speed polishing machine to reduce surface roughness, thereby reducing air resistance and improving aerodynamic performance. S5 assembly and welding: The fins and copper tubes are welded together using vacuum welding technology in an oxygen-free environment, which avoids oxidation and ensures the quality and strength of the welded joints. Continuous welding technology is used during the welding process to reduce the number of welding points, thereby improving the overall strength and sealing of the fins S6 quality inspection: The welded fins are pressure tested to check their sealing performance and ensure there is no leakage under high pressure. Use professional heat transfer efficiency testing equipment to test the heat transfer performance of the fins to ensure that it meets the design requirements. S7 Cleaning and Packaging: Using ultrasonic cleaning technology, the fin surface is deeply cleaned to remove oil, polishing residues and other tiny impurities. The cleaned and dried fins are packed with anti-corrosion packaging materials to protect the fins from damage during storage and transportation, ready for final installation and use.

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