Fin cleaning device for aluminum plate-fin heat exchanger

Abstract

The utility model discloses a fin cleaning device for an aluminum plate-fin heat exchanger, and belongs to the technical field of cleaning automation equipment special for products. The device provided by the utility model comprises a conveying mesh belt, a cleaning module, a rinsing module and a drying module, wherein the cleaning module, the rinsing module and the drying module are sequentially arranged along the conveying direction of the conveying mesh belt. The cleaning, rinsing and drying functions are integrated, and automatic operation is achieved. The conveying net belt comprises a lower net belt and an upper net belt, to-be-cleaned fins are placed between the lower net belt and the upper net belt, the lower net belt and the upper net belt are matched with each other to convey the to-be-cleaned fins, the to-be-cleaned fins sequentially pass through the cleaning module and the rinsing module to be washed and cleaned, and finally the to-be-cleaned fins enter the drying module to be rapidly dried. By means of the device, facilities such as a drying room or a cleaning tank do not need to be additionally built, cooperation of multiple persons is not needed, and the fins can directly enter the assembling link after being cleaned. The cleaning quality is stable and reliable, the labor intensity can be obviously reduced, the production efficiency is improved, and the lasting stability of the cleaning quality is ensured.

Description

Technical Field

[0001] This utility model belongs to the technical field of automated cleaning equipment for products, and specifically relates to a cleaning device for aluminum plate-fin heat exchanger fins. Background Technology

[0002] Aluminum alloy fins, as the core component of aluminum plate-fin heat exchangers, commonly include straight fins, porous fins, corrugated fins, and serrated fins, and are key components affecting the heat transfer efficiency of the heat exchanger. The height of heat exchanger fins is typically 5.0-9.5 mm, the width is 300-600 mm, and the length does not exceed 1500 mm. The cleaning quality of the fins plays a crucial role in the brazing quality of the heat exchanger, which in turn directly affects the safe operation of the heat exchanger. In the past, fin cleaning mainly used traditional acid-alkali immersion processes. The specific operation involved carefully placing the fins in a cleaning frame, first immersing them in a metal degreasing solution for degreasing treatment, and then sequentially lowering them into an alkaline washing tank, an acid washing tank, and a water tank using an overhead crane, repeatedly immersing them until the desired cleaning effect was achieved. After cleaning, specialized drying equipment was used for drying to ensure the fins were clean and completely dry before proceeding to subsequent assembly processes. Traditional cleaning processes are labor-intensive, cumbersome, and their quality relies heavily on the operator's experience, making it difficult to guarantee consistent cleaning results. Furthermore, wastewater from acid and alkali immersion requires neutralization and precipitation, necessitating large wastewater treatment facilities. Moreover, any leakage into the ground can cause permanent pollution, failing to meet environmental protection requirements.

[0003] With the rapid development of industries such as air separation, natural gas, and petrochemicals, the structural dimensions and pressure ratings of plate-fin heat exchangers have increased significantly. As a result, improving the cleaning efficiency and quality of heat exchanger parts, especially the fins, has become extremely urgent. At the same time, environmental protection requirements are becoming increasingly stringent. Therefore, there is a need to provide a cleaning device for aluminum plate-fin heat exchanger fins. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies and provide a fin cleaning device for aluminum plate-fin heat exchangers.

[0005] The specific technical solution adopted in this utility model is as follows:

[0006] This utility model provides a fin cleaning device for aluminum plate-fin heat exchangers, including a conveyor belt, a cleaning module, a rinsing module and a drying module, wherein the cleaning module, the rinsing module and the drying module are arranged sequentially along the conveying direction of the conveyor belt;

[0007] The conveyor belt includes a lower conveyor belt and an upper conveyor belt. The lower conveyor belt and the upper conveyor belt are arranged parallel to each other and spaced apart. The length of the lower conveyor belt is greater than that of the upper conveyor belt. The fins to be cleaned are placed between the lower conveyor belt and the upper conveyor belt. The lower conveyor belt and the upper conveyor belt cooperate with each other to convey the fins to be cleaned.

[0008] The cleaning module and rinsing module are respectively equipped with several sets of spray pipes, air cutters, and water tanks, with the air cutters located behind the spray pipes along the conveying direction of the fins to be cleaned; the spray pipes and air cutters in each set of the cleaning module and rinsing module are alternately arranged in the lower mesh belt and the upper mesh belt, with the spray pipes in the lower mesh belt and the spray pipes in the upper mesh belt, as well as the air cutters in the lower mesh belt and the air cutters in the upper mesh belt, being staggered; several sets of water tanks are located below the lower mesh belt, and the water tanks are equipped with a purification and filtration system;

[0009] The drying module includes several sets of air-cutting drying mechanisms, which are respectively staggered in the lower mesh belt and the upper mesh belt.

[0010] Preferably, the cleaning module includes a coarse cleaning zone and a fine cleaning zone, with the fine cleaning zone located behind the coarse cleaning zone along the conveying direction of the fins to be cleaned; the coarse cleaning zone includes a coarse cleaning spray pipe, a coarse cleaning air cutting pipe, and a coarse cleaning water tank; the fine cleaning zone includes a fine cleaning spray pipe, a fine cleaning air cutting pipe, and a fine cleaning water tank.

[0011] Furthermore, the coarse wash tank and the fine wash tank are equipped with a heating and insulation system and an automatic dosing system for adding cleaning agents.

[0012] Preferably, the rinsing module includes a pre-rinsing zone, a final rinsing zone, and a rinsing water tank. The final rinsing zone is located behind the pre-rinsing zone along the conveying direction of the fins to be cleaned. The pre-rinsing zone includes several sets of pre-rinsing spray pipes and pre-rinsing air cutting pipes.

[0013] The final rinsing zone includes several sets of final rinsing pipes and rinsing air-cutting pipes. The final rinsing pipes and rinsing air-cutting pipes are located in the lower mesh belt and the upper mesh belt. The final rinsing pipes in the lower mesh belt and the final rinsing pipes in the upper mesh belt are staggered.

[0014] Furthermore, a rinsing tube for further rinsing the fins to be cleaned is provided between the pre-rinsing zone and the final rinsing zone.

[0015] Furthermore, the rinsing water tank is a separate circulating water tank within the rinsing module.

[0016] Preferably, the lower mesh belt and the upper mesh belt cooperate to clamp and fix the fins to be cleaned, so as to ensure that the fins to be cleaned remain stable during the cleaning process.

[0017] Preferably, a condensate exhaust system is provided above the mesh belt.

[0018] Preferably, the lower mesh belt and the upper mesh belt are made of stainless steel.

[0019] Preferably, the air-drying mechanism includes a blower and a heating element, wherein the heating element is equipped with temperature, flow, and pressure sensors.

[0020] Compared with the prior art, this utility model has the following advantages:

[0021] This invention provides a cleaning device for aluminum plate-fin heat exchangers, integrating cleaning, rinsing, and drying functions into one unit, achieving automated operation. Using this device eliminates the need for additional drying rooms or cleaning tanks; the cleaned fins can directly proceed to the assembly stage, significantly improving production efficiency. Compared to traditional cleaning methods, this device requires less human intervention, provides stable and reliable cleaning quality, significantly reduces labor intensity, increases production efficiency, and ensures long-term stability of cleaning quality. Attached Figure Description

[0022] Figure 1 A schematic diagram of the overall structure of the aluminum plate-fin heat exchanger fin cleaning device provided in the embodiment.

[0023] Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0024] In the diagram: 1. Lower mesh belt; 2. Upper mesh belt; 3. Fins to be cleaned; 4. Coarse wash spray pipe; 5. Coarse wash cut air pipe; 6. Coarse wash water tank; 7. Fine wash spray pipe; 8. Fine wash cut air pipe; 9. Fine wash water tank; 10. Pre-rinse spray pipe; 11. Pre-rinse cut air pipe; 12. Rinse pipe; 13. Final rinse pipe; 14. Rinse cut air pipe; 15. Rinse water tank; 16. Cut air drying mechanism. Detailed Implementation

[0025] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below. Technical features in various embodiments of this utility model can be combined appropriately without conflict.

[0026] In the description of the specific embodiments of this utility model, it should be noted that, unless otherwise specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, and can refer to mechanical or electrical connections, or internal communication between two components, or direct connection. Terms such as "upper," "lower," "left," "right," "front," and "rear" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may change. Furthermore, the accompanying drawings of the disclosed embodiments of this utility model only involve structures mentioned in the embodiments of this utility model; other structures can refer to common designs. Where there is no conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0027] like Figure 1 As shown, in a preferred embodiment of this utility model, this embodiment provides a fin cleaning device for aluminum plate-fin heat exchangers, including a conveyor belt, a cleaning module, a rinsing module, and a drying module, which are arranged sequentially along the conveying direction of the conveyor belt. Figure 2 As shown, the conveyor belt includes a lower conveyor belt 1 and an upper conveyor belt 2. The lower conveyor belt 1 is longer than the upper conveyor belt 2. The lower conveyor belt 1 and the upper conveyor belt 2 are arranged parallel to each other, forming an overall "V" shape, with one end for loading and the other end for unloading. The fins 3 to be cleaned are first placed on the end of the lower conveyor belt 1 that extends relative to the upper conveyor belt 2, and the lower conveyor belt 1 conveys the fins 3. The transmission speed of the lower conveyor belt 1 and the upper conveyor belt 2 can be adjusted as required. When the fins to be cleaned are conveyed to the overlapping area of ​​the lower conveyor belt 1 and the upper conveyor belt 2, i.e., the cleaning module and the rinsing module, the lower conveyor belt 1 and the upper conveyor belt 2 work together to clamp and fix the fins 3 to be cleaned and continue to convey the fins 3 to be cleaned, ensuring that the fins 3 remain stable during the cleaning process and preventing deformation or movement caused by water flow from affecting the cleaning process. Due to the relatively humid working environment and the presence of cleaning agents, in order to reduce the corrosion rate of the conveyor belts 1 and 2 and extend their service life, both conveyor belts 1 and 2 are made of stainless steel.

[0028] In the device provided in this embodiment, the cleaning module includes a coarse cleaning zone and a fine cleaning zone. The fine cleaning zone is located behind the coarse cleaning zone along the conveying direction of the fins 3 to be cleaned. The coarse cleaning zone includes several sets of coarse cleaning spray pipes 4, several sets of coarse cleaning air cutting pipes 5, and a set of coarse cleaning water tanks 6. The coarse cleaning air cutting pipes 5 are located behind the coarse cleaning spray pipes 4 along the conveying direction of the fins 3 to be cleaned. The several sets of coarse cleaning spray pipes 4 and coarse cleaning air cutting pipes 5 are alternately arranged in the lower mesh belt 1 and the upper mesh belt 2. The coarse cleaning spray pipes 4 in the mesh belt 1 and the coarse cleaning spray pipes 4 in the upper mesh belt 2, and the coarse cleaning air cutting pipes 5 in the lower mesh belt 1 and the coarse cleaning air cutting pipes 5 in the upper mesh belt 2 are staggered. The coarse cleaning water tank 6 is located below the lower mesh belt 1. The fine cleaning zone includes several sets of fine cleaning spray pipes 7, several sets of fine cleaning air cutting pipes 8, and a set of fine cleaning water tanks 9. The fine cleaning spray pipe 7 is located behind the coarse cleaning cutter pipe 5, along the conveying direction of the fins 3 to be cleaned. The fine cleaning cutter pipe 8 is located behind the fine cleaning spray pipe 7, also along the conveying direction of the fins 3 to be cleaned. Several sets of fine cleaning spray pipes 7 and fine cleaning cutter pipes 8 are alternately arranged in the lower mesh belt 1 and the upper mesh belt 2. The fine cleaning spray pipes 7 in mesh belt 1 and the fine cleaning spray pipes 7 in upper mesh belt 2, as well as the fine cleaning cutter pipes 8 in lower mesh belt 1 and the fine cleaning cutter pipes 8 in upper mesh belt 2, are staggered. The fine cleaning water tank 9 is located below the lower mesh belt 1. The angles of the spray pipes and cutter pipes in both the lower mesh belt 1 and the upper mesh belt 2 can be manually adjusted to accommodate different types and sizes of fins 3 to be cleaned, thereby improving the cleanliness of the fins 3 to be cleaned. Since the surface of the fins 3 to be cleaned may have oil stains or other difficult-to-clean dirt, cleaning agents are added to the water in both the rough wash tank 6 and the fine wash tank 9. Because the cleaning solution performs better at a certain temperature, both the rough wash tank 6 and the fine wash tank 9 are equipped with heating and insulation systems, as well as sensors to monitor the temperature and concentration of the cleaning solution in real time. Furthermore, both the rough wash tank 6 and the fine wash tank 9 are equipped with automatic dosing and automatic replenishment systems. When the cleaning solution concentration is detected to be lower than the set parameters, cleaning agent is automatically added; when the liquid level in the tank is detected to be lower than a predetermined range, clean water is automatically added, ensuring that the liquid level in the tank remains within the predetermined range. To conserve water resources and reduce production costs, the cleaning solutions in the rough wash tank 6 and the fine wash tank 9 can be recycled. Simultaneously, to protect the environment, this embodiment uses environmentally friendly cleaning agents, combined with an automated control system, which not only causes no pollution to the environment but also effectively reduces production costs.

[0029] In the device provided in this embodiment, the rinsing module includes a pre-rinsing zone, a final rinsing zone, and a rinsing water tank 15. The final rinsing zone is located behind the pre-rinsing zone along the conveying direction of the fins 3 to be cleaned. The pre-rinsing zone includes several sets of pre-rinsing spray pipes 10 and pre-rinsing air-cutting pipes 11. The pre-rinsing spray pipes 10 are located behind the fine rinsing air-cutting pipes 8 along the conveying direction of the fins 3 to be cleaned, and the pre-rinsing air-cutting pipes 11 are located behind the pre-rinsing spray pipes 10 along the conveying direction of the fins 3 to be cleaned. Several sets of pre-rinsing spray pipes 10 and pre-rinsing air-cutting pipes 11 are alternately arranged in the lower mesh belt 1 and the upper mesh belt 2. The pre-rinsing spray pipes 10 in the mesh belt 1 and the pre-rinsing spray pipes 10 in the upper mesh belt 2, and the pre-rinsing air-cutting pipes 11 in the lower mesh belt 1 and the pre-rinsing air-cutting pipes 11 in the upper mesh belt 2 are staggered. All the spray pipes mentioned above are used to rinse the fins 3 to be cleaned, while the air cutter pipes remove the residual cleaning solution from the surface of the fins 3 after rinsing. The final rinsing area includes several sets of final rinsing pipes 13 and rinsing air cutter pipes 14. These are used for the final rinsing of the fins 3. The final rinsing pipes 13 and rinsing air cutter pipes 14 are located in the lower mesh belt 1 and the upper mesh belt 2, respectively. The final rinsing pipes 13 in the lower mesh belt 1 are staggered from those in the upper mesh belt 2, and the rinsing air cutter pipes 14 in the lower mesh belt 1 and the upper mesh belt 2 are also staggered. The rinsing water tank 15 is located below the lower mesh belt 1. The rinsing water tank 15 is a water tank with independent circulation within the rinsing module, and no cleaning agent is added to the rinsing water tank 15. In a preferred embodiment of this utility model, a rinsing pipe 12 for further rinsing the fins 3 to be cleaned is provided between the pre-rinsing zone and the final rinsing zone. The rinsing pipe 12 is located in front of the final rinsing pipe 13 along the conveying direction of the fins 3 to be cleaned. The final rinsing pipe 13 in the final rinsing zone is supplied with pure water. After the final rinsing, the fins 3 to be cleaned are cleaned by the rinsing air cut-off pipe 14 to remove the rinsing liquid from their surface. Multiple rinsing operations ensure that the dirt on the surface of the fins 3 to be cleaned is thoroughly cleaned. The clean water after rinsing enters the rinsing water tank 15, and then the rinsing water tank 15 supplies clean water to the pre-rinsing spray pipe 10 and the rinsing pipe 12 to clean the newly conveyed fins 3 to the pre-rinsing zone. The clean water reused through the pre-rinsing spray pipe 10 and the rinsing pipe 12 is discharged from the device through the drain pipe. The pure water inlet flow rate is consistent with the pre-rinsing drain flow rate to ensure the liquid level balance in the rinsing water tank 15. This setup ensures the rinsing water is constantly replenished, eliminating the need for water changes. In the device provided in this embodiment, the coarse rinse water tank 6, the fine rinse water tank 9, and the rinsing water tank 15 are all equipped with purification and filtration systems to remove impurities and particulate matter from the water. These systems reduce wear and tear on the tanks and related equipment, extending their lifespan. However, the filter screens in these purification and filtration systems require periodic replacement.

[0030] In the device provided in this embodiment, the drying module includes several sets of air-cutting drying mechanisms 16, which are staggered vertically within the lower conveyor belt 1 and the upper conveyor belt 2. Each air-cutting drying mechanism 16 includes a blower and a heating element. The cutting angle can be manually adjusted. Heated compressed air is used for cutting; the high temperature of the heated compressed air allows for rapid evaporation of residual moisture on the surface of the fins 3 to be cleaned, quickly drying the cleaned fins 3. The heating element is equipped with temperature, flow, and pressure sensors for temperature alarms and real-time monitoring. The dried fins 3 are then conveyed by the lower conveyor belt 1 to the portion of the lower conveyor belt 1 that extends beyond the upper conveyor belt 2 for unloading. To prevent hot air from contaminating the work area, a condenser exhaust system is installed above the upper conveyor belt 2 in the device provided in this embodiment.

[0031] The working principle of the device provided in this embodiment is as follows: The fins 3 to be cleaned are placed on the feeding end of the lower mesh belt 1, and the fins 3 to be cleaned are first conveyed to the cleaning module by the conveyor belt. The upper and lower surfaces of the fins 3 to be cleaned are washed at high speed and angle using the coarse wash spray pipe 4 and the fine wash spray pipe 7 to remove contaminants and grease from the fins 3 to be cleaned. After each coarse wash or fine wash, compressed air is used to cut the air through the coarse wash cut air pipe 5 or the fine wash cut air pipe 8 to remove the cleaning liquid attached to the fins 3 to be cleaned, so as to avoid the cleaning liquid being carried into the rinsing area as much as possible. After the fins 3 to be cleaned enter the rinsing area, they are further washed at high speed through the pre-rinse spray pipe 10 to remove the residual cleaning liquid on the fins 3 to be cleaned. Then, compressed air is used to cut the air through the pre-rinse cut air pipe again to remove the cleaning liquid attached to the surface of the fins 3 to be cleaned. Next, the fins are further rinsed through rinsing pipe 12 and then cleaned for the final rinse through final rinsing pipe 13. Afterwards, residual rinsing solution is removed from the fins 3 through the rinsing cut-off air pipe. This completes the cleaning process for the fins 3. The cleaned fins 3 then enter the drying zone, where heated compressed air is used for cutting-off air to quickly dry them. Finally, the cleaned fins 3 are conveyed to the unloading area via the lower conveyor belt 1.

[0032] The embodiments described above are merely preferred solutions of this utility model, and are not intended to limit the scope of this utility model. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this utility model. Therefore, all technical solutions obtained by equivalent substitution or equivalent transformation fall within the protection scope of this utility model.

Claims

1. A fin cleaning device for aluminum plate-fin heat exchangers, characterized in that, It includes a conveyor belt, a cleaning module, a rinsing module, and a drying module, which are arranged sequentially along the conveying direction of the conveyor belt; The conveyor belt includes a lower conveyor belt (1) and an upper conveyor belt (2). The lower conveyor belt (1) and the upper conveyor belt (2) are arranged parallel to each other and spaced apart. The length of the lower conveyor belt (1) is greater than that of the upper conveyor belt (2). The fins (3) to be cleaned are placed between the lower conveyor belt (1) and the upper conveyor belt (2). The lower conveyor belt (1) and the upper conveyor belt (2) cooperate with each other to convey the fins (3) to be cleaned. The cleaning module and rinsing module are respectively equipped with several sets of spray pipes, air cut-off pipes and water tanks, and the air cut-off pipes are located behind the spray pipes along the conveying direction of the fins (3) to be cleaned; the spray pipes and air cut-off pipes in each set of the cleaning module and rinsing module are alternately arranged in the lower mesh belt (1) and the upper mesh belt (2), and the spray pipes in the lower mesh belt (1) and the spray pipes in the upper mesh belt (2) are staggered; several sets of water tanks are located below the lower mesh belt (1), and the water tanks are equipped with a purification and filtration system; The drying module includes several sets of air-cutting drying mechanisms (16), which are respectively staggered in the lower mesh belt (1) and the upper mesh belt (2).

2. The aluminum plate-fin heat exchanger fin cleaning device according to claim 1, characterized in that, The cleaning module includes a coarse cleaning zone and a fine cleaning zone. The fine cleaning zone is located behind the coarse cleaning zone along the conveying direction of the fins (3) to be cleaned. The coarse cleaning zone includes a coarse cleaning spray pipe (4), a coarse cleaning air cutting pipe (5), and a coarse cleaning water tank (6). The fine cleaning zone includes a fine cleaning spray pipe (7), a fine cleaning air cutting pipe (8), and a fine cleaning water tank (9).

3. The aluminum plate-fin heat exchanger fin cleaning device according to claim 2, characterized in that, The coarse wash tank (6) and the fine wash tank (9) are equipped with a heating and insulation system and an automatic dosing system for adding cleaning agents.

4. The aluminum plate-fin heat exchanger fin cleaning device according to claim 1, characterized in that, The rinsing module includes a pre-rinsing zone, a final rinsing zone and a rinsing water tank (15). The final rinsing zone is located behind the pre-rinsing zone along the conveying direction of the fins (3) to be cleaned. The pre-rinsing zone includes several sets of pre-rinsing spray pipes (10) and pre-rinsing air cut pipes (11). The final rinsing zone includes several sets of final rinsing pipes (13) and rinsing air-cutting pipes (14). The final rinsing pipes (13) and rinsing air-cutting pipes (14) are located in the lower mesh belt (1) and the upper mesh belt (2). The final rinsing pipes (13) in the lower mesh belt (1) and the final rinsing pipes (13) in the upper mesh belt (2) are staggered. The rinsing air-cutting pipes (14) in the lower mesh belt (1) and the rinsing air-cutting pipes (14) in the upper mesh belt (2) are staggered.

5. The aluminum plate-fin heat exchanger fin cleaning device according to claim 4, characterized in that, A rinsing tube (12) for further rinsing the fins (3) to be cleaned is provided between the pre-rinsing zone and the final rinsing zone.

6. The aluminum plate-fin heat exchanger fin cleaning device according to claim 4, characterized in that, The rinsing water tank (15) is a water tank that circulates independently within the rinsing module.

7. The aluminum plate-fin heat exchanger fin cleaning device according to claim 1, characterized in that, The lower mesh belt (1) and the upper mesh belt (2) work together to clamp and fix the fins (3) to be cleaned, so as to ensure that the fins (3) to be cleaned remain stable during the cleaning process.

8. The aluminum plate-fin heat exchanger fin cleaning device according to claim 1, characterized in that, A condenser exhaust system is provided above the mesh belt (2).

9. The aluminum plate-fin heat exchanger fin cleaning device according to claim 1, characterized in that, The lower mesh belt (1) and the upper mesh belt (2) are made of stainless steel.

10. The aluminum plate-fin heat exchanger fin cleaning device according to claim 1, characterized in that, The air-cutting drying mechanism (16) includes a blower and a heating component, wherein the heating component is equipped with temperature, flow rate and pressure sensors.

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