Airflow separation device for membrane material production

Abstract

The utility model relates to the technical field of film production, and provides an airflow separation device for film material production. The airflow separation device comprises at least two treatment cavities, a conveying belt, an air return assembly and an air blowing assembly, and the at least two treatment cavities are sequentially arranged in the first direction. The conveying belt penetrates through the processing chambers in the first direction. And the air return assembly is arranged between two adjacent processing cavities with different temperatures and different negative pressures, the air return assembly is constructed to form an air return opening facing the conveying belt, and the negative pressure of the air return opening is larger than the negative pressure in the two adjacent processing cavities. The air blowing assembly is arranged on one opposite side face of the air return assembly in the first direction. The air blowing assembly is configured to blow hot air with the same temperature as the processing chamber on the downstream side towards the conveying belt. According to the airflow separation device, airflow movement and heat exchange between the adjacent treatment cavities can be effectively blocked, and accurate and stable control over the temperatures of the multiple treatment cavities is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of thin film production, and in particular to an air flow separation device for film material production. Background Art

[0002] In the production of various types of thin films, a conveyor belt coated with raw materials passes through multiple processing chambers in sequence. The temperature and negative pressure of each processing chamber vary due to process requirements in order to accurately control the speed and degree of coating reaction.

[0003] Because adjacent processing chambers have different set temperatures and negative pressures, the conveyor belt passing through the connection between adjacent chambers can easily cause airflow to flow from the low-negative-pressure processing chamber to the high-negative-pressure processing chamber. When airflows of different temperatures and pressures mix at the connection between adjacent processing chambers, the actual temperature of each processing chamber will fluctuate abnormally, affecting the reaction control accuracy and causing instability in indicators such as film crystallinity and mechanical properties.

[0004] Currently, airflow is typically blocked by installing a baffle at the connection port to reduce its size. However, the gap between the baffle and the conveyor belt cannot completely block airflow, and temperature fluctuations still occur. To ensure effective baffle blocking, the baffle edge must be close to the running conveyor belt and the uncured coating. This can easily scratch the membrane surface during production, causing damage to the membrane or equipment failure. Utility Model Content

[0005] In view of the above problems, an embodiment of the present application provides an airflow separation device for film material production. The airflow separation device can effectively block the airflow movement and heat exchange between adjacent processing chambers, achieve precise and stable control of the temperatures of multiple processing chambers, and improve the reaction uniformity and product performance consistency of the film material production process.

[0006] In order to achieve the above objectives, the embodiments of the present application provide the following technical solutions:

[0007] The present application provides an air flow separation device for film material production, comprising: at least two processing chambers, at least two processing chambers are arranged in sequence along a first direction; a conveyor belt, the conveyor belt runs through each processing chamber along the first direction; a return air component, the return air component is arranged between two adjacent processing chambers, and the two adjacent processing chambers have different temperatures and negative pressures, and the return air component is constructed to form a return air outlet facing the conveyor belt; the negative pressure of the return air outlet is greater than the negative pressure in the two adjacent processing chambers; a blowing component, the blowing component is arranged on one side of the return air component opposite to each other along the first direction; the blowing component is constructed to blow hot air of a first temperature toward the conveyor belt, and the first temperature is the same as the temperature of the processing chamber on the downstream side of the conveyor belt.

[0008] In a possible embodiment, the return air assembly includes a first return air section and a second return air section, the top end of the first return air section is connected to the top cavity wall of the processing chamber, and the bottom end of the first return air section is spaced from the upper surface of the conveyor belt; the bottom end of the first return air section is structured to form a return air outlet; the bottom end of the second return air section is connected to the bottom cavity wall of the processing chamber, and the top end of the second return air section is spaced from the lower surface of the conveyor belt; the top end of the second return air section is structured to form a return air outlet; the first return air section and the second return air section are opposite to each other along the thickness direction of the conveyor belt, and a chamber connecting port is formed between the first return air section and the second return air section, so that the conveyor belt passes through the chamber connecting port and passes through two adjacent processing chambers.

[0009] In a possible embodiment, the processing chamber includes an upper shell portion and a lower shell portion that are spaced apart, and a conveyor belt is arranged between the upper shell portion and the lower shell portion; the first return air portion is located between the upper shell portion and the conveyor belt, and the first return air portion is connected to the top wall of the upper shell portion; the second return air portion is located between the lower shell portion and the conveyor belt, and the second return air portion is connected to the bottom wall of the lower shell portion; the first return air portion and the second return air portion form two processing chambers on both sides of the first direction.

[0010] In a possible implementation manner, the first air return portion and the second air return portion are symmetrically arranged with respect to the conveyor belt.

[0011] In a possible embodiment, the blowing assembly includes a first blowing section and a second blowing section, the first blowing section is arranged on one side of the first return air section opposite to the first direction, and the bottom end of the first blowing section is spaced from the upper surface of the conveyor belt; the bottom end of the first blowing section is structured to form a blowing port; the second blowing section is arranged on one side of the second return air section opposite to the first direction, and the top end of the second blowing section is spaced from the upper surface of the conveyor belt; the top end of the second blowing section is structured to form a blowing port; the first blowing section and the second blowing section are opposite to each other along the thickness direction of the conveyor belt, and a chamber connecting port is formed between the first blowing section and the second blowing section, so that the conveyor belt passes through the chamber connecting port and passes through two adjacent processing chambers.

[0012] In a possible implementation, along the thickness direction of the conveyor belt, the distance between the first blowing part and the second blowing part is smaller than the distance between the first return air part and the second return air part.

[0013] In a possible implementation, along the width direction of the conveyor belt, the return air length of the return air outlet is greater than the width of the conveyor belt, and the return air outlet covers the conveyor belt.

[0014] In a possible implementation, the blowing assembly is located on the downstream side of the return air assembly along the first direction toward the conveyor belt.

[0015] In a possible implementation, the return air assembly includes a suction pump and a return air duct. The suction pump is connected to the return air port via the return air duct, and a negative pressure regulating valve is provided on the return air duct.

[0016] In a possible embodiment, the blowing assembly includes a hot air source and an air supply pipe, the hot air source is connected to the processing chamber through the air supply pipe; and a wind speed regulating valve is provided on the air supply pipe.

[0017] The present application provides an airflow separation device for film material production, comprising at least two processing chambers, a conveyor belt, a return air assembly, and a blowing assembly. The at least two processing chambers are arranged sequentially along a first direction. The conveyor belt extends through each processing chamber along the first direction. The return air assembly is disposed between two adjacent processing chambers, wherein the two adjacent processing chambers have different temperatures and different negative pressures. The return air assembly is configured to form a return air inlet facing the conveyor belt, and the negative pressure at the return air inlet is greater than the negative pressure within the two adjacent processing chambers.

[0018] In this way, when the conveyor belt passes through two adjacent processing chambers, the airflow that originally flows toward the high negative pressure chamber due to the pressure difference will turn and flow into the return air outlet under the action of the strong negative pressure field formed by the return air outlet, thereby blocking the airflow channel between the two adjacent processing chambers and avoiding the interference of airflow movement on the temperature field of each processing chamber.

[0019] The blowing assembly is disposed on one side of the return air assembly opposite to the first direction and is configured to blow hot air at a first temperature toward the conveyor belt, thereby forming an airflow barrier on the conveyor belt and further blocking an airflow penetration path between two adjacent processing chambers.

[0020] Furthermore, the first temperature is the same as the temperature of the processing chamber downstream of the conveyor belt. That is, the temperature of the hot air blown by the blowing assembly is the same as the temperature in the downstream processing chamber, thereby effectively preventing the airflow in the upstream processing chamber from interfering with the temperature environment in the downstream processing chamber, thereby ensuring a stable temperature field in the downstream processing chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0022] Figure 1 A schematic structural diagram of an airflow separation device for membrane material production provided in an embodiment of the present application.

[0023] Description of reference numerals:

[0024] 10-air flow dividing device;

[0025] 100- conveyor belt; 200- processing chamber; 300- return air assembly; 300a- return air outlet; 400- blowing assembly; 400a- blowing outlet;

[0026] 210 - upper shell; 220 - lower shell; 310 - first return air unit; 320 - second return air unit; 330 - return air duct; 340 - negative pressure regulating valve; 410 - first blowing unit; 420 - second blowing unit;

[0027] A-first direction; L1-first distance; L2-second distance. DETAILED DESCRIPTION

[0028] As mentioned in the background, during the production of functional membranes such as high-performance films and flexible circuit substrates, a conveyor belt coated with liquid or semi-solid materials passes through multiple hot air treatment chambers connected in series. Each treatment chamber is independently controlled with a specific temperature and negative pressure environment to precisely control the speed and extent of curing, crosslinking, or chemical reactions of the coating material on the conveyor belt.

[0029] During actual production, adjacent processing chambers have connecting ports for conveyor belts to pass through. Due to the varying temperatures and negative pressures within each processing chamber, significant gas flow can occur between adjacent processing chambers, with gas tending to flow from the processing chamber with lower negative pressure to the processing chamber with higher negative pressure. This pressure-differential-driven airflow carries heat through areas of varying temperatures, severely disrupting the temperature uniformity and stability within each processing chamber. This can make it difficult to precisely control the physical or chemical reactions of the coating material, impacting the stability of film production and the performance consistency of the final product.

[0030] In related technologies, a common solution is to install baffles at the connecting ports between adjacent processing chambers. While ensuring smooth passage of the conveyor belt, the size of the chamber connecting ports is minimized to limit gas exchange between adjacent processing chambers. This has limited effectiveness: while baffles can partially suppress gas exchange and the resulting temperature fluctuations, they cannot completely eliminate the interference caused by this physical connection, and temperature stability remains insufficient.

[0031] However, to maximize the barrier's effectiveness, the baffle edge must be in close contact with the conveyor belt and any uncured coating material on its surface. This makes it very easy for the baffle to scrape against the belt or coating if the belt experiences vibration, deviation, or coating buildup during production. This can lead to coating scratches, belt wear, and even equipment downtime, severely impacting production continuity.

[0032] In view of this, the researchers of this application designed an airflow separation device for membrane material production.

[0033] Based on the physical nature of air flow movement, namely the directional flow characteristics driven by pressure difference and the heat exchange law caused by temperature gradient, the researchers of this application broke through the technical limitations of using mechanical barriers in traditional solutions, and set a return air outlet with a negative pressure higher than that of the adjacent processing chambers at the chamber connecting port. The negative pressure difference is used to divert the airflow originally flowing to the high-negative-pressure chamber to the return air outlet, thereby cutting off the airflow crosstalk channel across the processing chambers.

[0034] In addition, in order to address the airflow that may remain on the surface of the conveyor belt, the researchers of this application added an air outlet on the side of the return air outlet with the same temperature as the processing chamber on the downstream side of the conveyor belt. By blowing out hot air with the same temperature as the processing chamber on the downstream side of the conveyor belt, a "wind wall" can be formed on the surface of the conveyor belt, which not only blocks the intrusion of airflow from the upstream processing chamber, but also avoids interference with the temperature environment of the downstream processing chamber through temperature field matching.

[0035] In this way, through the coordinated design of negative pressure drainage at the return air outlet and hot air sealing at the outlet, the air flow and temperature disturbance between the processing chambers can be effectively suppressed. At the same time, the risk of contact between the baffle and the conveyor belt can be avoided, thereby improving the temperature stability and production safety during the membrane production process in a multi-chamber environment.

[0036] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0037] Figure 1 This is a schematic diagram of the structure of the airflow separation device for film material production provided in the embodiment of the present application. Figure 1 As shown, an embodiment of the present application provides an airflow separation device for film material production (hereinafter referred to as the airflow separation device). The airflow separation device 10 can be widely used in industrial production in continuous production fields such as functional film materials and flexible electronic substrates that require precise environmental isolation.

[0038] For example, in a battery electrode coating and drying line, the airflow separation device 10 can be set at the connecting port of the adjacent processing chamber 200, which can accurately block the cross-flow of water vapor and solvent vapor in different temperature ranges, thereby avoiding cracking or abnormal crystallization on the electrode surface due to temperature and humidity fluctuations.

[0039] Alternatively, during the curing process of the organic light-emitting diode flexible substrate, the airflow isolation device can also be installed in the transition area between the UV curing chamber and the thermal annealing chamber to eliminate cross-contamination between the oxygen-sensitive curing area and the inert gas protection area, while blocking the impact of high-temperature airflow on the photosensitive material and ensuring the molecular structure stability of the organic light-emitting layer.

[0040] Of course, the airflow isolation device can also be used on the biaxial stretching line of food packaging film. It is set in the process transition zone between longitudinal stretching and transverse stretching to effectively isolate the hot air interference in different orientation stages and avoid thickness drift problems caused by uneven stress distribution within the film material.

[0041] Reference Figure 1 As shown, the airflow separation device 10 includes a conveyor belt 100 and at least two processing chambers 200 arranged in series along the conveying direction of the conveyor belt 100. Each processing chamber 200 can be set to a different temperature and negative pressure environment according to the film production process requirements to adapt to the precise control requirements of different process stages such as coating curing and cross-linking reaction in film production.

[0042] For ease of description, in the embodiment of the present application, the conveying direction of the conveyor belt 100 is defined as the first direction A. The surface of the conveyor belt 100 carries a film substrate coated with a liquid or semi-solid raw material. The conveyor belt 100 passes through each processing chamber 200 along the first direction A, and realizes the orderly transportation of materials between the chambers through continuous transmission.

[0043] The conveyor belt 100 has an upper surface and a lower surface that are opposite to each other and spaced apart in the thickness direction thereof. Figure 1 In the direction shown in FIG, the surface of the conveyor belt facing the positive direction of the Y axis is the upper surface, and the surface facing the negative direction of the Y axis is the lower surface. The upper surface of the conveyor belt 100 plays a supporting role, and the conveyed items are located on the upper surface of the conveyor belt 100.

[0044] Continuing with the figure, the airflow separation device 10 further includes a return air assembly 300, which is disposed between two adjacent processing chambers 200 with different temperatures and negative pressures. The return air assembly 300 is configured to form a return air port 300a facing the conveyor belt 100, and the negative pressure of the return air port 300a is greater than the negative pressure in the two adjacent processing chambers 200. Figure 1 For example, the negative pressure at the air return port 300 a is greater than the negative pressure of the left processing chamber 200 , and greater than the negative pressure of the right processing chamber 200 .

[0045] In this way, when the conveyor belt 100 passes through two adjacent processing chambers 200, the airflow that originally flows toward the high negative pressure chamber due to the pressure difference will turn and flow into the return air port 300a under the action of the strong negative pressure field formed by the return air port 300a, thereby blocking the airflow channel between the two adjacent processing chambers 200 and avoiding the interference of airflow movement on the temperature field of each processing chamber 200.

[0046] To ensure reliable airflow separation, the return air length of the return air vent 300a along the width of the conveyor belt 100 is greater than the width of the conveyor belt 100, and the return air vent 300a covers the conveyor belt 100. In this way, the coverage area of ​​the return air vent 300a forms a transverse airflow barrier along the width of the conveyor belt 100, eliminating control blind spots and preventing airflow from flowing at the edge areas along the width of the conveyor belt 100.

[0047] Furthermore, the return air length of the return air vent 300a is greater than the width of the conveyor belt 100. This allows for a reasonable dimensional margin design, ensuring that within the range of positional deviations of the conveyor belt 100, the return air vent 300a can always maintain effective coverage of the width of the conveyor belt 100. This significantly improves the reliability of the airflow divider 10 and enhances its adaptability to conveyor belts 100 of varying specifications.

[0048] In some possible implementations, the return air outlet 300a can be a continuous long strip opening structure, which extends along the width direction of the conveyor belt 100 to the outside of the left and right edges of the conveyor belt 100, forming a uniform and stable airflow barrier through negative pressure adsorption covering the entire width of the conveyor belt 100.

[0049] In other possible implementations, the return air outlet 300a may also include an array of multiple small holes, each of which is arranged at intervals along the width direction of the conveyor belt 100. The overall coverage of the multiple small holes also exceeds the left and right edges of the width direction of the conveyor belt 100, and an equivalent continuous negative pressure drainage field is formed in the full width area of ​​the conveyor belt 100 through the array-distributed discrete adsorption points.

[0050] In the embodiment of the present application, the air return assembly 300 includes a first air return portion 310 and a second air return portion 320. The top end of the first air return portion 310 is connected to the top wall of the processing chamber 200, and the bottom end of the first air return portion 310 is spaced apart from the upper surface of the conveyor belt 100. The bottom end of the second air return portion 320 is connected to the bottom wall of the processing chamber 200, and the top end of the second air return portion 320 is spaced apart from the lower surface of the conveyor belt 100.

[0051] In some embodiments, a first baffle (not shown) and a second baffle (not shown) may be disposed between two adjacent processing chambers 200. The first baffle is perpendicular to the conveyor belt 100 and connected to the top wall of the processing chamber 200, while the second baffle is perpendicular to the conveyor belt 100 and connected to the bottom wall of the processing chamber 200. The first and second baffles may form a physical partition between the two adjacent processing chambers 200. A first air return portion 310 is connected below the first baffle, and a second air return portion 320 is connected above the second baffle. A chamber connection port is formed between the first and second air return portions 310, 320, through which the conveyor belt 100 can pass through the two adjacent processing chambers 200.

[0052] With this arrangement, the first and second baffles provide a mounting base for the return air assembly 300, allowing the first and second return air sections 310, 320 to be precisely positioned close to the upper and lower surfaces of the conveyor belt 100. Furthermore, the first and second baffles block the convection path of the hot air flow between two adjacent heat treatment chambers 200, significantly inhibiting heat exchange between the two adjacent processing chambers 200 and reducing the load on the return air assembly 300. The return air assembly 300 is positioned below the baffles, close to the conveyor belt 100. A directional airflow channel is formed in the area near the operating area of ​​the conveyor belt 100, directing the remaining airflow after being blocked by the baffles into the return air system. Thus, the physical separation effect of the first and second baffles, combined with the negative pressure drainage effect of the first and second return air sections 310, 320, creates a double barrier to the airflow between two adjacent chambers, ensuring stable operation of multiple processing chambers 200 in different temperature zones.

[0053] In other embodiments, the processing chamber 200 may include an upper shell portion 210 and a lower shell portion 220 spaced apart from each other. In the embodiment of the present application, the upper shell portion 210 is a downwardly opening housing structure. For example, the upper shell portion 210 includes a top wall and a first side wall disposed below the top wall. The top wall and the first side wall together form a downwardly opening housing structure. The top wall may constitute the top wall of the processing chamber 200.

[0054] The lower shell 220 is an upwardly opening housing structure. For example, the lower shell 220 includes a bottom wall and a second side wall disposed above the bottom wall. The bottom wall and the second side wall together form an upwardly opening housing structure. The bottom wall may constitute the bottom wall of the processing chamber 200.

[0055] There is a gap between the first side wall of the upper shell 210 and the second side wall of the lower shell 220 , and the conveyor belt 100 is disposed between the upper shell 210 and the lower shell 220 .

[0056] The first air return portion 310 is disposed between the upper housing 210 and the conveyor belt 100, and is connected to the top wall of the upper housing 210. The second air return portion 320 is disposed between the lower housing 220 and the conveyor belt 100, and is connected to the bottom wall of the lower housing 220. The first air return portion 310 and the second air return portion 320 form two processing chambers 200 on either side of the first direction A.

[0057] This eliminates the need for additional baffles, directly utilizing the lateral walls of the first and second return air sections 310, 320 as the interface separating adjacent processing chambers 200. This eliminates the need for baffle mounting components and connection structures, significantly improving assembly efficiency and reducing mechanical complexity. Furthermore, by directly connecting the first return air section 310 to the upper shell 210 and the second return air section 320 to the lower shell 220, the assembly interface between the baffle and the return air assembly 300 is eliminated, avoiding potential air leakage caused by gaps in the interface. This significantly reduces potential air leaks and the risk of thermal deformation.

[0058] Of course, the first return air unit 310 can also be integrally formed with the upper housing 210, and the second return air unit 320 can be integrally formed with the lower housing 220. This integral design ensures seamless connection between the first return air unit 310 and the upper housing 210, and between the second return air unit 320 and the lower housing 220, thereby further improving the sealing performance and operational reliability of the airflow divider 10. Furthermore, the integral design significantly enhances the structural rigidity and thermal stability of the airflow divider 10, effectively preventing the risk of deformation of the return air assembly 300 due to temperature fluctuations or mechanical vibration.

[0059] The bottom end of the first air return section 310 forms an air return port 300a, while the top end of the second air return section 320 forms an air return port 300b. The first and second air return sections 310, 320 are positioned opposite each other along the thickness of the conveyor belt 100. A cavity communication opening is formed between the first and second air return sections 310, 320, through which the conveyor belt 100 passes. The width of the cavity communication opening is adapted to the normal transmission requirements of the conveyor belt 100.

[0060] In this way, the first air return section 310 and the second air return section 320 are arranged opposite each other along the thickness direction of the conveyor belt 100, forming negative pressure drainage fields on the upper and lower surfaces of the conveyor belt 100, respectively. Furthermore, the negative pressure at the return air port 300a is always greater than the negative pressure in the adjacent processing chambers 200. Consequently, the airflow at the cavity communication port can be drawn into the return air assembly 300.

[0061] In some embodiments, the first air return unit 310 and the second air return unit 320 can be arranged symmetrically with respect to the conveyor belt 100. In this way, the first air return unit 310 and the second air return unit 320 can form a uniform negative pressure drainage field on the upper surface of the conveyor belt 100 and the lower surface of the conveyor belt 100, respectively, so that the airflow adsorption force on the upper surface and the lower surface of the conveyor belt 100 is always in a balanced state. The airflow at the chamber communication port can be evenly sucked in by the upper air return unit and the lower air return unit, thereby preventing the airflow from escaping due to insufficient adsorption force on the upper surface or the lower surface of the conveyor belt 100 caused by the asymmetric layout of the upper air return unit and the lower air return unit, thereby improving the airflow blocking efficiency.

[0062] In addition, the first return air section 310 and the second return air section 320 are symmetrically arranged about the conveyor belt 100, which can form airflow forces of equal magnitude and opposite directions above and below the conveyor belt 100, and can effectively offset the stress caused by the pressure difference, so that the conveyor belt 100 maintains force balance during operation, avoids deformation or stretching deviation of the conveyor belt 100 due to local stress concentration, and significantly reduces the risk of deviation or vibration caused by uneven force on the upper or lower surface of the conveyor belt 100, which is particularly suitable for the stable transportation of ultra-thin flexible film materials.

[0063] The return air assembly 300 also includes a suction pump (not shown) and a return air duct 330. The suction pump communicates with the return air port 300a via the return air duct 330, establishing a stable negative pressure suction channel. A negative pressure regulating valve 340 is installed on the return air duct 330. By real-time monitoring of the pressure parameters within two adjacent processing chambers 200, the opening of the negative pressure regulating valve 340 is adjusted to control the suction intensity of the airflow at the return air port 300a. This creates a stable and controllable negative pressure drainage field on both the upper and lower surfaces of the conveyor belt 100.

[0064] In some embodiments, the first air return unit 310 may be a housing structure, with a first connection port formed on the top wall of the processing chamber 200. The first connection port communicates with the interior of the first air return unit 310 and is connected to the return air duct 330. Connection methods include, but are not limited to, threaded connections, clamping connections, and flange connections. In this case, the first air return unit 310 forms part of the return air duct 330.

[0065] The second air return unit 320 can be constructed as a housing. The bottom wall of the processing chamber 200 forms a second connection port, which communicates with the interior of the second air return unit 320 and is connected to the return air duct 330. Similarly, the connection between the second connection port and the return air duct 330 may include, but is not limited to, threaded connections, clamping connections, and flange connections. In this case, the second air return unit 320 forms part of the return air duct 330.

[0066] In other embodiments, the first air return unit 310 and the second air return unit 320 may both be shell structures, with the air return duct 330 extending into the first air return unit 310 and the second air return unit 320, with the ends of the air return duct 330 facing the return air inlet 300a for suction. This creates a centralized negative pressure suction channel, ensuring suction strength.

[0067] In some embodiments, the return air assembly 300 may further include two third return air sections (not shown), the top ends of the two third return air sections being connected to the ends of the first return air section 310, and the bottom ends of the two third return air sections being connected to the ends of the second return air section 320. The two third return air sections are located on either side of the conveyor belt along its width, and return air ports 300a are provided on the sides of the two third return air sections facing each other.

[0068] This arrangement allows the third air return section to form lateral negative pressure barriers on both sides of the conveyor belt 100 in the width direction. Working in conjunction with the first air return section 310 and the second air return section 320, this achieves full circumferential airflow control over the conveyor belt 100, eliminating potential blind spots where airflow could escape from the edges of the conveyor belt 100. Furthermore, the frame-like connection between the third air return section, the first air return section 310, and the second air return section 320 enhances the structural rigidity of the return air assembly 300 and improves the stability of the airflow isolation device.

[0069] Continue to refer to Figure 1 As shown, the airflow dividing device 10 further includes a blowing assembly 400, which is disposed on one of the opposite sides of the return air assembly 300 along the first direction A. The blowing assembly 400 is configured to blow hot air at a first temperature toward the conveyor belt 100, the first temperature being the same as the temperature of the processing chamber 200 downstream of the conveyor belt 100. The blowing assembly 400 is provided with a blowing port 400a on the surface facing the conveyor belt 100, thereby blowing air toward the surface of the conveyor belt 100 to form an airflow barrier.

[0070] In the embodiment of the present application, the downstream side of the conveyor belt 100 refers to the front area along the running direction of the conveyor belt 100 (i.e., the first direction A), and the upstream side of the conveyor belt 100 refers to the opposite direction area along the running direction of the conveyor belt 100 (i.e., the first direction A).

[0071] In this way, the blowing assembly 400 can form an airflow barrier on the upper and lower surfaces of the conveyor belt 100, further blocking the airflow penetration path at the chamber communication port. The temperature of the hot air blown by the blowing assembly 400 is the same as the temperature in the downstream processing chamber 200, which can effectively prevent the airflow in the upstream processing chamber 200 from interfering with the temperature environment in the downstream processing chamber 200, ensuring a stable temperature field in the downstream processing chamber 200.

[0072] In some possible embodiments, the blowing assembly 400 may be disposed on the side of the processing chamber 200 upstream of the return air assembly 300 along the first direction A, toward the conveyor belt 100. In this manner, the airflow barrier formed by the blowing assembly 400 can pre-treat the airflow from the upstream processing chamber 200. The airflow blown by the blowing assembly 400 can effectively neutralize the temperature of the upstream processing chamber 200, providing a smoother transition environment for temperature-sensitive materials. Furthermore, disposing the blowing assembly 400 at one end of the return air assembly 300 upstream of the conveyor belt 100 along the first direction A can form an airflow isolation layer before the return air assembly 300, preemptively consuming the kinetic energy of the residual airflow in the upstream processing chamber 200 and making it easier for the return air assembly 300 to capture the residual airflow.

[0073] In other possible embodiments, the blowing assembly 400 may be disposed on the side of the processing chamber 200 downstream of the conveyor belt 100 along the first direction A of the return air assembly 300. In this way, the airflow barrier formed by the blowing assembly 400 can effectively block residual airflow from the upstream processing chamber 200, preventing it from entering the downstream processing chamber 200. Furthermore, because the temperature of the hot air blown out by the blowing assembly 400 is the same as the temperature in the downstream processing chamber 200, even if a small amount of airflow from the blowing assembly 400 infiltrates into the downstream processing chamber 200, it will not disrupt the temperature balance in the downstream processing chamber 200. This further ensures the precise isolation of the temperature field and airflow field between adjacent processing chambers 200.

[0074] In the embodiment of the present application, the blowing assembly 400 includes a first blowing part 410 and a second blowing part 420. The first blowing part 410 and the second blowing part 420 are arranged opposite each other along the thickness direction of the conveyor belt 100, and a chamber communication port is formed between the first blowing part 410 and the second blowing part 420, so that the conveyor belt 100 passes through the chamber communication port and passes through two adjacent processing chambers 200.

[0075] The first blowing section 410 is disposed on one of the opposite sides of the first return air section 310 along the first direction A, and the bottom end of the first blowing section 410 is spaced apart from the upper surface of the conveyor belt 100. The bottom end of the first blowing section 410 forms a blowing port 400a. For example, the first blowing section 410 can be disposed on the side of the processing chamber 200 downstream of the first return air section 310 along the first direction A toward the conveyor belt 100. In this way, the first blowing section 410 can form a stable airflow isolation layer above the conveyor belt 100, effectively blocking residual airflow in the upstream chamber above the conveyor belt 100 that may still penetrate along the upper surface of the conveyor belt 100 after being processed by the return air assembly 300.

[0076] The second blowing section 420 is disposed on one side of the second air return section 320 that is opposite to the second air return section 320 along the first direction A. The top of the second blowing section 420 is spaced apart from the upper surface of the conveyor belt 100, and the top of the second blowing section 420 forms a blowing port 400a. For example, the second blowing section 420 may be disposed on a side of the second air return section 320 that faces the processing chamber 200 downstream of the conveyor belt 100 along the first direction A. The second blowing section 420 may form an airflow isolation layer below the conveyor belt 100, preventing airflow from flowing underneath the conveyor belt 100.

[0077] The first blowing section 410 and the second blowing section 420 can be arranged symmetrically with respect to the conveyor belt 100. This allows the first blowing section 410 and the second blowing section 420 to form evenly distributed airflow isolation layers on the upper and lower surfaces of the conveyor belt 100, respectively, ensuring consistent airflow control effects on both the upper and lower surfaces of the conveyor belt 100. Furthermore, the symmetrical arrangement of the first blowing section 410 and the second blowing section 420 can balance the airflow forces acting on the conveyor belt 100, effectively eliminating uneven force on the conveyor belt 100 caused by unilateral airflow impacts, preventing lateral displacement or posture deviation of the conveyor belt 100 during operation, and thus ensuring the stability of the airflow isolation device.

[0078] In the embodiment of the present application, the spacing between the first blowing section 410 and the second blowing section 420 along the thickness direction of the conveyor belt 100 is defined as a first spacing L1. The spacing between the first return air section 310 and the second return air section 320 along the thickness direction of the conveyor belt 100 is defined as a second spacing L2. In some possible embodiments, the first spacing L1 is smaller than the second spacing L2. This arrangement can reduce the spacing between the first blowing section 410 and the second blowing section 420. The smaller spacing allows the airflow blown out by the first blowing section 410 and the second blowing section 420 to be closer to the surface of the conveyor belt 100, thereby enhancing the interception effect of the residual airflow at the chamber connection port.

[0079] In addition, since the airflow blown out by the blowing part can be recovered by the return air part after completing the isolation function, setting the distance between the first return air part 310 and the second return air part 320 along the thickness direction of the conveyor belt 100 to be larger than the distance between the first blowing part 410 and the second blowing part 420 along the thickness direction of the conveyor belt 100 helps optimize the flow path of the airflow, allowing the airflow to achieve a natural transition from the high-pressure area to the low-pressure area, and avoiding disturbances caused by airflow turbulence.

[0080] The blowing assembly 400 also includes a hot air source (not shown in the figure) and an air supply pipe (not shown in the figure). The hot air source is connected to the processing chamber 200 through the air supply pipe to form a closed hot air circuit, and the hot air flows to the blowing ports 400a of the first blowing part 410 and the second blowing part 420 to ensure the temperature stability of the air flow.

[0081] The air supply pipe is equipped with a wind speed control valve (not shown). The airflow output intensity of the blowing assembly 400 can be precisely controlled by adjusting the valve opening according to the actual needs of different process stages. For example, when processing easily deformable ultra-thin flexible substrates, the airflow output intensity of the blowing assembly 400 can be reduced to reduce the impact pressure on the film surface. In scenarios where enhanced edge airflow interception is required, the airflow output intensity of the blowing assembly 400 can be increased to enhance airflow blocking performance.

[0082] Since the blowing assembly 400 and the processing chamber 200 downstream of the conveyor belt 100 have the same temperature, the blowing assembly 400 can share a hot air source with the adjacent downstream processing chamber 200. In this way, the same hot air source can ensure that the airflow blown out by the blowing assembly 400 is completely consistent with the temperature of the adjacent downstream processing chamber 200, forming a thermal buffer barrier at the cavity connection port with no temperature difference with the adjacent downstream processing chamber 200, thereby preventing thermal stress deformation of the film material due to the temperature difference and preventing airflow of different temperatures from infiltrating into the downstream processing chamber 200 and interfering with the temperature field in the downstream processing chamber 200.

[0083] In addition, the blowing assembly 400 and the adjacent downstream processing chamber 200 share a hot air source, which can also simplify the structure of the airflow isolation device, reduce the maintenance nodes caused by setting up an independent heat source for the blowing assembly 400, and reduce debugging complexity and maintenance costs.

[0084] It should be noted that references in this specification to "one embodiment," "an embodiment," "an exemplary embodiment," "some embodiments," and the like indicate that the described embodiment may include a particular feature, structure, or characteristic, but not necessarily every embodiment includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.

[0085] Generally speaking, terms should be understood, at least in part, based on the context in which they are used. For example, as used herein, the term "one or more" can be used to describe any feature, structure, or characteristic in the singular sense, or can be used to describe a combination of features, structures, or characteristics in the plural sense, depending at least in part on the context. Similarly, terms such as "a," "an," or "the" can also be understood to convey either singular or plural usage, depending at least in part on the context.

[0086] It should be readily understood that “on,” “above,” and “over” in this application should be interpreted in the broadest manner, such that “on” means not only “directly on something,” but also includes “on something” with intervening features or layers therebetween, and “above” or “over” includes not only the meaning of “above” or “over,” but also includes “above” or “over” with no intervening features or layers therebetween (i.e., directly on something).

[0087] Additionally, spatially relative terms, such as "below," "beneath," "beneath," "above," and the like, may be used herein for ease of description to describe the relationship of one element or feature to other elements or features as depicted in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. The device may be otherwise oriented (rotated 90° or at other orientations), and the spatially relative descriptors used herein should be interpreted accordingly.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An airflow separation device for film production, characterized in that: include: At least two processing chambers, the at least two processing chambers are arranged sequentially along a first direction; a conveyor belt, the conveyor belt passing through each of the processing chambers along the first direction; a return air assembly, the return air assembly being disposed between two adjacent processing chambers, wherein the two adjacent processing chambers have different temperatures and different negative pressures, the return air assembly being configured to form a return air outlet facing the conveyor belt; the negative pressure of the return air outlet being greater than the negative pressure within the two adjacent processing chambers; A blowing assembly is arranged on one side of the return air assembly opposite to the first direction; the blowing assembly is constructed to blow hot air of a first temperature toward the conveyor belt, and the first temperature is the same as the temperature of the processing chamber on the downstream side of the conveyor belt.

2. The airflow separation device according to claim 1, characterized in that: The return air assembly includes a first return air portion and a second return air portion, wherein the top end of the first return air portion is connected to the top wall of the processing chamber, and the bottom end of the first return air portion is spaced apart from the upper surface of the conveyor belt; the bottom end of the first return air portion is configured to form the return air port; The bottom end of the second air return portion is connected to the bottom wall of the processing chamber, and the top end of the second air return portion is spaced apart from the lower surface of the conveyor belt; the top end of the second air return portion forms the return air port; The first air return portion and the second air return portion are opposite to each other along the thickness direction of the conveyor belt, and a chamber communication port is formed between the first air return portion and the second air return portion, so that the conveyor belt passes through two adjacent processing chambers through the chamber communication port.

3. The airflow separation device according to claim 2, characterized in that: The processing chamber comprises an upper shell portion and a lower shell portion which are spaced apart from each other, and the conveyor belt is arranged between the upper shell portion and the lower shell portion; The first air return portion is located between the upper shell and the conveyor belt, and the first air return portion is connected to the top wall of the upper shell; The second air return portion is located between the lower shell and the conveyor belt, and the second air return portion is connected to the bottom wall of the lower shell; Two processing chambers are formed on both sides of the first air return portion and the second air return portion along the first direction.

4. The airflow separation device according to claim 2, characterized in that: The first air return portion and the second air return portion are symmetrically arranged with respect to the conveyor belt.

5. The airflow separation device according to claim 2, characterized in that: The blowing assembly includes a first blowing part and a second blowing part, wherein the first blowing part is disposed on one side surface of the first air return part opposite to the first air return part along a first direction, and a bottom end of the first blowing part is spaced apart from the upper surface of the conveyor belt; the bottom end of the first blowing part is structured to form a blowing port; The second blowing portion is disposed on one side surface of the second air return portion opposite to the first direction, and a top end of the second blowing portion is spaced apart from the upper surface of the conveyor belt; the top end of the second blowing portion is structured to form a blowing port; The first blowing part and the second blowing part are opposite to each other along the thickness direction of the conveyor belt, and a chamber communication port is formed between the first blowing part and the second blowing part, so that the conveyor belt passes through two adjacent processing chambers through the chamber communication port.

6. The airflow separation device according to claim 5, characterized in that: Along the thickness direction of the conveyor belt, the distance between the first blowing part and the second blowing part is smaller than the distance between the first return air part and the second return air part.

7. The airflow separation device according to any one of claims 1 to 6, characterized in that: Along the width direction of the conveyor belt, the return air length of the return air outlet is greater than the width of the conveyor belt, and the return air outlet covers the conveyor belt.

8. The airflow separation device according to any one of claims 1 to 6, characterized in that: The blowing assembly is located on the downstream side of the return air assembly along the first direction toward the conveyor belt.

9. The airflow separation device according to any one of claims 1 to 6, characterized in that: The return air assembly includes a suction pump and a return air duct. The suction pump is connected to the return air port through the return air duct, and a negative pressure regulating valve is provided on the return air duct.

10. The airflow separation device according to any one of claims 1 to 6, characterized in that: The blowing assembly includes a hot air source and an air supply pipe. The hot air source is connected to the processing chamber through the air supply pipe. A wind speed regulating valve is provided on the air supply pipe.

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