An infrared drying coating tunnel

Abstract

This invention provides an infrared drying coating channel, including a drying channel box. An infrared drying box and a heat flow recovery box are fixedly installed on both sides of the upper part of the drying channel box. The infrared drying box and the heat flow recovery box have identical structures. An infrared heater is fixedly installed inside the infrared drying box, and the infrared heater is connected to a temperature controller installed outside the drying channel box. Equally spaced conveyor rollers are rotatably installed in the lower center of the drying channel box, and coating material is conveyed above the conveyor rollers. In this invention, the infrared heater and fan in the infrared drying box work together, and the heat flow crosses with the coating material, quickly removing volatiles, enhancing heat transfer, and shortening drying time. Uniform heat flow from top to bottom prevents coating defects. The heat flow recovery box saves energy, reduces costs, and improves the environment, making it suitable for special coating materials.

Description

Technical Field

[0001] This utility model belongs to the field of coating and drying technology, and in particular relates to an infrared drying coating channel. Background Technology

[0002] In the field of coating processes, the drying stage plays a crucial role in the quality of coated materials and production efficiency. Traditional drying methods have many drawbacks. For example, the common hot air drying method relies solely on hot air to heat the coating material, which is not only energy-intensive (as in the drying process of lithium battery coating machines, where hot air is blown out of nozzles to dry the material belt, consuming a large amount of energy), but also slow and inefficient. While infrared drying can utilize the thermal effect of infrared rays, the lack of airflow makes it difficult to quickly remove volatiles generated during the drying process, affecting the drying effect and potentially leading to uneven surface temperature, resulting in localized overheating or insufficient drying. Furthermore, existing drying equipment often lacks a structural design that effectively coordinates heat flow with the material transport path, making the drying process inaccurate and inefficient, failing to meet the high-quality and high-efficiency requirements of modern coating processes.

[0003] Therefore, it is essential to invent an infrared drying coating channel. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an infrared drying coating channel, including a drying channel box, an infrared drying box, a heat flow recovery box, an infrared heater, a temperature controller, conveying rollers, and coating material. The infrared drying box and the heat flow recovery box are fixedly installed on the upper two sides of the drying channel box, respectively. The infrared drying box and the heat flow recovery box have the same structure. Several infrared heaters are fixedly installed inside the infrared drying box. The infrared heaters are connected to the temperature controller installed outside the drying channel box. Several equidistant conveying rollers are rotatably installed in the lower middle of the drying channel box. The coating material is conveyed above the conveying rollers.

[0005] Preferably, the infrared drying box includes an integrated box body, an air exchange vent, a hot air flow channel, an upper air nozzle, a lower air nozzle, and a high-temperature resistant fan. The integrated box body is fixedly installed on one side of the inner wall of the drying channel box, and the air exchange vent on the integrated box body protrudes outside the drying channel box. Several hot air flow channels are equidistantly arranged along their own axial direction below the integrated box body. Each hot air flow channel is equipped with an upper air nozzle and a lower air nozzle, and each hot air flow channel is equipped with a high-temperature resistant fan.

[0006] Preferably, a number of horizontally equidistant infrared heaters are fixedly installed inside the integrated box of the infrared drying box, and filter assembly structures are installed in the air exchange vents of both the infrared drying box and the heat flow recovery box.

[0007] Preferably, the heat flow channels of the infrared drying box and the heat flow recovery box are located between one end of the two conveying rollers, and the upper air nozzle and the lower air nozzle are also located between one end of the two conveying rollers, with the upper air nozzle and the lower air nozzle of the infrared drying box and the heat flow recovery box arranged opposite to each other.

[0008] Preferably, the heat flow channel, the upper nozzle, and the lower nozzle are in an inverted "F" shape, wherein the upper nozzle and the lower nozzle are tapered nozzle structures, the upper nozzle is located on the upper side of the coating material, and the lower nozzle is located on the lower side of the coating material.

[0009] Preferably, the heat flow generated by the upper and lower air nozzles of the infrared drying box intersects the conveying path of the coating material in a cross shape, with the upper heat flow located above the coating material and the lower heat flow located below the coating material.

[0010] Preferably, the two streams of heat generated by the upper and lower air nozzles of the infrared drying box can be recovered by the corresponding upper and lower air nozzles of the heat recovery box; the high-temperature resistant fans of the infrared drying box and the heat recovery box rotate in opposite directions.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This invention utilizes an infrared heater and a high-temperature resistant fan working in tandem within an infrared drying chamber. The heat flow generated by the upper and lower air nozzles intersects the coating material's transport path in a cross shape. This heat flow rapidly removes volatiles generated on the coating material's surface due to infrared radiation, preventing their accumulation and ensuring efficient drying. Simultaneously, it enhances heat transfer, significantly shortening drying time and greatly improving production efficiency compared to traditional hot air drying or infrared drying.

[0012] This invention features two heat streams that act on the upper and lower surfaces of the coating material, respectively. The structural design of the heat flow channel, the upper air nozzle, and the lower air nozzle, especially the tapered nozzle structure, ensures that the heat flow evenly covers the surface of the coating material. Combined with the radiant heating of the infrared heater, this effectively avoids defects such as localized overheating, cracking, and bubbling caused by uneven heating of the coating, ensuring the consistency and stability of the coating quality and improving the product yield.

[0013] This utility model's heat recovery box can recover the two streams of heat generated by the infrared drying box, which are then discharged through pipes for reuse or treatment. On the one hand, it reduces heat waste, improves energy utilization, and lowers production costs; on the other hand, it avoids the accumulation of heat and volatiles in the drying channel, improves the working environment, and reduces safety risks, making it particularly suitable for drying coating materials containing flammable, explosive, or toxic volatiles. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0015] Figure 2 This is a partial cross-sectional structural diagram of the present invention.

[0016] Figure 3 This is a utility model Figure 2 A schematic diagram of the main structure.

[0017] In the picture: 1. Drying channel box; 2. Infrared drying box; 21. Integrated box body; 22. Exchange air outlet; 23. Hot flow channel; 24. Upper air nozzle; 25. Lower air nozzle; 26. High temperature resistant fan; 3. Heat flow recovery box; 4. Infrared heater; 5. Temperature controller; 6. Conveyor roller; 7. Coating material. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0019] In the description of the embodiments, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of the utility model, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in the present utility model based on the specific circumstances.

[0020] As attached Figure 1 To be continued Figure 3 As shown: This utility model provides an infrared drying coating channel, including a drying channel box 1, an infrared drying box 2, a heat flow recovery box 3, an infrared heater 4, a temperature controller 5, conveying rollers 6, and coating material 7. The infrared drying box 2 and the heat flow recovery box 3 are fixedly installed on the upper two sides of the drying channel box 1, respectively. The infrared drying box 2 and the heat flow recovery box 3 have the same structure. Several infrared heaters 4 are fixedly installed inside the infrared drying box 2. The infrared heaters 4 are connected to the temperature controller 5 installed outside the drying channel box 1. Several equidistantly arranged conveying rollers 6 are rotatably installed in the lower middle of the drying channel box 1. The coating material 7 is conveyed above the conveying rollers 6.

[0021] Furthermore, the infrared drying box 2 is composed of an integrated box body 21, an air exchange vent 22, a hot air flow channel 23, an upper air nozzle 24, a lower air nozzle 25, and a high-temperature resistant fan 26. The integrated box body 21 is fixedly installed on one side of the inner wall of the drying channel box 1 using bolts. Its material is stainless steel with good heat insulation properties to reduce heat loss. The air exchange vent 22 on the integrated box body 21 protrudes outward to the outside of the drying channel box 1. This vent 22 is mainly used to facilitate air exchange between the inside of the drying box and the outside environment, providing the necessary airflow channel for hot air circulation. Below the integrated box body 21, several hot air flow channels 23 are evenly distributed along its axial direction. These hot air flow channels 23 are made of high-temperature resistant aluminum alloy and can withstand the high-temperature environment during the drying process. Each heat flow channel 23 is equipped with an upper air outlet 24 and a lower air outlet 25. At the same time, each heat flow channel 23 is also equipped with a high-temperature resistant fan 26. The high-temperature resistant fan 26 is connected and fixed to the heat flow channel 23 through a snap-fit ​​structure. After it is started, it can promote the efficient flow of heat in the heat flow channel 23 and discharge it through the upper air outlet 24 and the lower air outlet 25.

[0022] Furthermore, inside the integrated box 21 of the infrared drying box 2, several horizontally equidistant infrared heaters 4 are fixedly installed by brackets. These infrared heaters 4 maintain a certain safe distance from the inner wall of the integrated box 21 to avoid damage to the integrated box 21 due to local overheating. Their main function is to provide the heat required for the drying process. In addition, filter assembly structures are installed in the air exchange vents 22 of both the infrared drying box 2 and the heat flow recovery box 3. The filter assembly structure adopts a detachable design and is composed of multiple layers of metal filter screens, which can effectively filter dust, impurities, etc. in the air, preventing them from entering the drying box or heat flow recovery box and affecting the normal operation and drying effect of the equipment.

[0023] Furthermore, the heat flow channels 23 of both the infrared drying box 2 and the heat flow recovery box 3 are located between one end of the two conveying rollers 6. This position is precisely calculated to ensure that the heat flow transported by the heat flow channels 23 can act on the coating material 7 to the maximum extent. Similarly, the upper air nozzle 24 and the lower air nozzle 25 are also located between one end of the two conveying rollers 6, and the upper air nozzle 24 and the lower air nozzle 25 of the infrared drying box 2 and the heat flow recovery box 3 are arranged opposite each other. This relative arrangement facilitates good circulation of heat flow around the coating material 7, improving heat utilization efficiency, and also facilitates heat recovery by the heat flow recovery box 3.

[0024] Furthermore, the heat flow channel 23, the upper nozzle 24, and the lower nozzle 25 are collectively arranged in an inverted "F" shape. This structural design allows the heat flow to be more concentrated during discharge, enhancing the intensity of the heat flow's effect on the coating material 7. Both the upper nozzle 24 and the lower nozzle 25 are tapered nozzle structures made of engineering plastic. Their tapered design increases the speed and pressure of heat flow discharge. The upper nozzle 24 is located on the upper side of the coating material 7, and the lower nozzle 25 is located on the lower side of the coating material 7. This positional distribution allows for simultaneous drying of the upper and lower surfaces of the coating material 7, ensuring uniform drying of the coating material 7.

[0025] Furthermore, the heat flow generated by the upper air nozzle 24 and lower air nozzle 25 of the infrared drying box 2 intersects the conveying path of the coating material 7 in a cross shape. Specifically, the upper heat flow exits from the upper air nozzle 24 and is positioned above the coating material 7, flowing in a direction perpendicular to the conveying direction of the coating material 7. The lower heat flow exits from the lower air nozzle 25 and is positioned below the coating material 7, also flowing in a direction perpendicular to the conveying direction of the coating material 7. This cross-shaped arrangement allows the heat flow to fully contact the coating material 7, greatly improving heat transfer efficiency and ensuring that the coating material 7 can be dried quickly and evenly during the conveying process.

[0026] Furthermore, the two streams of heat generated by the upper air nozzle 24 and lower air nozzle 25 of the infrared drying box 2, after drying the coating material 7, can be precisely recovered by the corresponding upper air nozzle 24 and lower air nozzle 25 of the heat recovery box 3. This heat recovery method can effectively reduce heat waste and improve energy utilization. In addition, the high-temperature resistant fans 26 of the infrared drying box 2 and the heat recovery box 3 rotate in opposite directions. The high-temperature resistant fan 26 of the infrared drying box 2 rotates clockwise to discharge the heat outward, while the high-temperature resistant fan 26 of the heat recovery box 3 rotates counterclockwise to absorb and recover the heat. The coordinated operation of the two ensures the efficient and stable operation of the heat circulation system.

[0027] Furthermore, the temperature controller 5 is installed on the operation panel outside the drying tunnel chamber 1, and it contains a relay module and a temperature signal processing unit. The power supply terminal of each infrared heater 4 is connected to the relay output interface of the temperature controller 5 through an independent wire to achieve independent on / off control. At the same time, a platinum resistance temperature sensor (such as PT100) is installed inside the drying tunnel chamber 1 near the infrared heater 4. This sensor is connected to the signal input port of the temperature controller 5 through a shielded wire to collect temperature data around the infrared heater 4 in real time.

[0028] The working principle is as follows: First, the coating material 7 is conveyed by the traction mechanism on the conveyor roller 6 inside the drying channel box 1, moving smoothly along the set path. At the same time, the temperature controller 5 starts and regulates the infrared heater 4 inside the infrared drying box 2. The infrared heater 4 starts to work and generates heat, causing the internal temperature of the integrated box 21 to rise.

[0029] Next, the high-temperature fan 26 inside the infrared drying box 2 rotates clockwise, drawing hot air from the integrated box 21 into the hot airflow channel 23. The hot air flows within the hot airflow channel 23 and is discharged through the upper air nozzle 24 and the lower air nozzle 25. Since the upper air nozzle 24 and the lower air nozzle 25 are tapered and located above and below the coating material 7 respectively, the discharged hot air intersects the conveying path of the coating material 7 in a cross shape, ensuring full contact with the coating material 7 and achieving simultaneous drying of its upper and lower surfaces.

[0030] Then, the two streams of heat after drying are precisely recovered by the upper air nozzle 24 and lower air nozzle 25 of the heat recovery box 3 under the suction of the high-temperature resistant fan 26 rotating counterclockwise inside the heat recovery box 3, and re-enter the heat flow channel 23 of the heat recovery box 3.

[0031] Finally, the recovered heat flow can be reused in the heat recycling process, while the air exchange vent 22 filters outside air through the filter assembly and then replenishes the inside of the box, maintaining the stable operation of the heat flow circulation system and continuously and efficiently drying the coating material 7 being transported.

[0032] Any technical solution that achieves the above-mentioned technical effects by utilizing the technical solution described in this utility model, or by designing a similar technical solution inspired by the technical solution described in this utility model, falls within the protection scope of this utility model.

Claims

1. An infrared drying coating channel, characterized in that, The equipment includes a drying channel box (1), an infrared drying box (2), a heat recovery box (3), an infrared heater (4), a temperature controller (5), a conveying roller (6), and a coating material (7). The infrared drying box (2) and the heat recovery box (3) are fixedly installed on the upper two sides of the drying channel box (1), respectively. The infrared drying box (2) and the heat recovery box (3) have the same structure. Several infrared heaters (4) are fixedly installed inside the infrared drying box (2). The infrared heaters (4) are connected to the temperature controller (5) installed outside the drying channel box (1). Several equidistant conveying rollers (6) are rotatably installed in the lower middle of the drying channel box (1). The coating material (7) is conveyed above the conveying rollers (6).

2. The infrared drying coating channel as described in claim 1, characterized in that: The infrared drying box (2) includes an integrated box body (21), an air exchange vent (22), a heat flow channel (23), an upper air nozzle (24), a lower air nozzle (25), and a high-temperature resistant fan (26). The integrated box body (21) is fixedly installed on the upper side of the inner wall of the drying channel box (1). The air exchange vent (22) provided on the integrated box body (21) protrudes outside the drying channel box (1). Several heat flow channels (23) are arranged equidistantly along their own axial direction below the integrated box body (21). Each heat flow channel (23) is equipped with an upper air nozzle (24) and a lower air nozzle (25). Each heat flow channel (23) is equipped with a high-temperature resistant fan (26).

3. The infrared drying coating channel as described in claim 2, characterized in that: The infrared drying box (2) has several horizontally equidistant infrared heaters (4) fixedly installed in the integrated box body (21). The infrared drying box (2) and the heat flow recovery box (3) are both equipped with filter assembly structures in their air exchange vents (22).

4. The infrared drying coating channel as described in claim 3, characterized in that: The heat flow channel (23) of the infrared drying box (2) and the heat flow recovery box (3) is located between one end of the two conveying rollers (6), and the upper air nozzle (24) and the lower air nozzle (25) are also located between one end of the two conveying rollers (6). The upper air nozzle (24) and the lower air nozzle (25) of the infrared drying box (2) and the heat flow recovery box (3) are arranged opposite to each other.

5. The infrared drying coating channel as described in claim 4, characterized in that: The heat flow channel (23), the upper air nozzle (24) and the lower air nozzle (25) are inverted "F" shaped structures, wherein the upper air nozzle (24) and the lower air nozzle (25) are tapered nozzle structures, the upper air nozzle (24) is located on the upper side of the coating material (7) and the lower air nozzle (25) is located on the lower side of the coating material (7).

6. The infrared drying coating channel as described in claim 5, characterized in that: The heat flow generated by the upper air nozzle (24) and lower air nozzle (25) of the infrared drying box (2) intersects the conveying path of the coating material (7) in a cross shape, with the upper heat flow located above the coating material (7) and the lower heat flow located below the coating material (7).

7. The infrared drying coating channel as described in claim 6, characterized in that: The two streams of heat generated by the upper air nozzle (24) and lower air nozzle (25) of the infrared drying box (2) can be recovered by the corresponding upper air nozzle (24) and lower air nozzle (25) of the heat recovery box (3); the high-temperature resistant fans (26) of the infrared drying box (2) and the heat recovery box (3) rotate in opposite directions.

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