Organic light emitting material recycling device

Abstract

The application provides an organic light-emitting material recycling device, a main frame is formed with a closed main chamber, a support net plate is horizontally placed in the main chamber, the support net plate is used for placing an anti-attachment plate with the organic light-emitting material, a spray port of a dry ice generator is located in the main chamber, a material precipitation container is located below the support net plate, a gas circulation pipeline is communicated to the bottom of the material precipitation container, a gas outlet end of the gas circulation pipeline is communicated to the main chamber, a material collecting unit is communicated on the gas circulation pipeline, gas in the gas circulation pipeline enters the material collecting unit through an inlet of the material collecting unit, and the gas in the material collecting unit reenters the gas circulation pipeline through an outlet of the material collecting unit. The whole recycling process is carried out in a fully-closed space, and the gas is circulated between the main chamber and the material collecting unit through the gas circulation pipeline, so that the industry problems of material loss, cross contamination and purity reduction caused by open operation are fundamentally solved.

Description

Technical Field

[0001] This invention relates to an organic light-emitting material recycling device. Background Technology

[0002] Organic light-emitting materials (OLEDs) are the core functional layer materials for electroluminescence in OLED (Organic Light-Emitting Diode) displays, and their performance and cost directly determine the display quality and market competitiveness of the product. In the current mainstream vacuum thermal evaporation process, after the organic light-emitting material is heated and vaporized, it is partially deposited onto the TFT (Thin Film Transistor Array) substrate through the opening of the FMM (Fine Metal Mask) to form pixels. However, more than 80% of the material is not effectively utilized due to scattering, obstruction, and other reasons, instead condensing on components such as anti-fouling plates within the cavity. This results in an actual utilization rate of less than 20% for the already extremely expensive organic light-emitting materials, becoming a key bottleneck restricting panel manufacturers from reducing costs.

[0003] Current recycling methods for this condensed residual material have multiple drawbacks, resulting in unsatisfactory recycling efficiency and quality. Firstly, in the primary recycling stage, traditional methods rely on manual scraping of the condensed material from the anti-sticking plate. Since the anti-sticking plate is mostly a mesh structure, a large amount of material condenses within the mesh openings, making manual collection ineffective. This results in a collection rate of only 30%-35% of the total input, leading to significant waste. Furthermore, the open-style manual scraping operation is not only inefficient but also easily introduces dust, moisture, and other contaminants, posing uncontrollable product quality risks. Secondly, in the subsequent stripping and collection stages, traditional open-style stripping operations generate airflow due to personnel movements, causing lightweight, micro-powdered organic luminescent materials to float around. This not only results in low collection efficiency but also leads to mixing of different types of high-purity materials. Once mixed, the materials lose their value for purification and reuse, resulting in secondary waste.

[0004] In the existing technology, some closed organic light-emitting material recycling devices have been developed for open organic light-emitting material recycling devices, which solves the problem of product quality risk. However, the closed system also brings some drawbacks, such as blockage during the collection process, which leads to insufficient negative pressure in the entire cavity and production cannot proceed. To solve these problems, common technical means are to maintain a certain negative pressure system. However, the negative pressure of the negative pressure system is unstable, which leads to unstable recycling, that is, additional pressure monitoring measures are required. Alternatively, personnel can be arranged to perform drainage regularly, such as manual vibration, but the effect is minimal.

[0005] In summary, existing organic light-emitting material (OLED) recycling devices have significant shortcomings in terms of collection rate, operating environment control, and prevention of material mixing. Therefore, developing an efficient, closed, automated OLED recycling device that can guarantee material purity is an urgent industrial need for improving resource utilization and overcoming cost bottlenecks. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to overcome the significant defects of existing organic light-emitting material recycling devices in terms of collection rate, operating environment control and anti-mixing of materials, and to provide an organic light-emitting material recycling device that can achieve high efficiency, closed and automated operation and ensure material purity.

[0007] The present invention solves the above-mentioned technical problems through the following technical solutions:

[0008] This invention provides an organic light-emitting material recycling device, comprising a main frame, a supporting mesh plate, a dry ice generator, a material sedimentation container, a gas circulation pipeline, at least one set of material collection units, and a fan. The main frame forms a sealed main chamber. The supporting mesh plate is placed horizontally within the main chamber and serves to hold a protective plate against the attached organic light-emitting material. The nozzle of the dry ice generator is located within the main chamber, above and facing the supporting mesh plate. The material sedimentation container is located below the supporting mesh plate. The supporting mesh plate has several vertically penetrating perforations that connect to... The internal space of the material sedimentation container; the inlet end of the gas circulation pipeline is connected to the bottom of the material sedimentation container, and the outlet end of the gas circulation pipeline is connected to the main chamber, with the outlet end of the gas circulation pipeline located above the support mesh plate; the material collection unit is connected to the gas circulation pipeline, and the gas in the gas circulation pipeline enters the material collection unit through the inlet of the material collection unit, and the gas in the material collection unit re-enters the gas circulation pipeline through the outlet of the material collection unit; the fan is installed on the gas circulation pipeline, and the fan is located between the material collection unit and the outlet end of the gas circulation pipeline.

[0009] In this technical solution, the entire recycling process is carried out in a fully enclosed space. The gas circulates continuously between the main chamber and the material collection unit through the gas circulation pipeline, without contacting the external environment. This effectively avoids the introduction of external moisture, oxygen, and dust, ensuring the high purity of the recycled organic materials. It is particularly suitable for recycling optoelectronic materials such as OLEDs, which have extremely high purity requirements.

[0010] Preferably, the material settling container has a vertical central axis, the vertical distance between the inner circumferential surface of the material settling container and the central axis gradually decreases in the direction away from the supporting mesh plate, and the air inlet of the gas circulation pipeline is located at the lowest point of the material settling container.

[0011] In this technical solution, the material settling container utilizes the gravity self-aggregation effect to rapidly concentrate the falling organic material towards the bottom center. This makes it easier for the organic material falling into the material settling container to accumulate at the very bottom, facilitating the extraction of the organic material from the gas inlet of the gas circulation pipeline. This greatly optimizes the extraction efficiency and reduces the residue of organic material on the container wall.

[0012] Preferably, the material collection unit includes a primary collection unit, and the number of primary collection units is one or more; the primary collection unit includes a cyclone and a primary collection box located below the cyclone, the inlet of the primary collection unit is a first air inlet located on the upper end face of the cyclone, the outlet of the primary collection unit is a first air outlet located on the upper end face of the cyclone, and the lower end of the cyclone is connected to the primary collection box.

[0013] In this technical solution, the primary collection unit adopts the principle of centrifugal separation and separates the organic materials in the airflow through a cyclone separator. It can collect about 80% to 90% of the organic materials in the airflow. It has low power consumption, large processing capacity, and does not require filter media, thus avoiding clogging problems.

[0014] Preferably, the material collection unit includes a secondary collection unit, and the number of the secondary collection units is one or more; the secondary collection unit includes a secondary collection box, the inlet of the secondary collection unit is the second air inlet of the secondary collection box, the outlet of the secondary collection unit is the second air outlet of the secondary collection box, and the interior of the secondary collection box is provided with a filter element, with the second air inlet and the second air outlet located on both sides of the filter element.

[0015] In this technical solution, the secondary collection unit serves as a fine filtration unit. Fine particles remaining in the airflow after primary collection are efficiently intercepted when passing through the filter, ensuring the cleanliness of the discharged gas while capturing the most valuable high-purity fine materials.

[0016] Preferably, the secondary collection unit further includes a pulse dust collector connected to the secondary collection box, and the pulse dust collector can send pulse airflow to the filter element at a set frequency.

[0017] In this technical solution, a pulse airflow is sent to the filter element by a pulse dust collector, which can periodically shake the organic material on the filter element into the secondary collection box, automatically clean the filter element, maintain stable air resistance and collection efficiency under long-term system operation, and extend the maintenance cycle.

[0018] Preferably, the set frequency is 30 to 60 seconds per cycle.

[0019] In this technical solution, when the pulse dust collector sends pulse airflow to the filter element at a set frequency of 30 to 60 seconds / time, it can fully utilize the backflushing of airflow to effectively remove the material on the filter element of the secondary collection box, thereby enabling the high-purity recovery of nearly 98% of the organic light-emitting material on the vapor-deposited anti-fouling plate.

[0020] Preferably, the organic light-emitting material recycling device further includes a heating gas pipeline, the inlet of which is connected to the fan, and the outlet of which is connected to the main chamber, and a gas heating element is provided on the heating gas pipeline.

[0021] In this technical solution, during the stripping process, the temperature in the main chamber needs to be precisely controlled within the process requirements. If the temperature does not meet the requirements, the gas heating element needs to be activated, and the heating gas will be directly supplied to the main chamber through the heating gas pipeline.

[0022] Preferably, the gas circulation pipeline has multiple outlets, which are located on the top or side wall of the main chamber.

[0023] In this technical solution, the multi-outlet design is conducive to forming a uniform and controllable airflow field in the main chamber, which can not only guide the scattered organic materials after stripping smoothly to the material sedimentation container, but also avoid the disorderly adhesion of organic materials in the main chamber caused by local eddies.

[0024] Preferably, the gas circulation pipeline branches in the middle to form a first branch pipeline and a second branch pipeline; the material collection unit and the fan are located on the first branch pipeline, and the second branch pipeline is directly connected to the inlet and outlet of the gas circulation pipeline.

[0025] In this technical solution, the bypass design provides precise flow regulation capability; when the processing volume is large, part of the airflow can be diverted to ensure that the airflow velocity entering the collection unit is always in the optimal efficiency range, preventing the collection efficiency from decreasing due to excessive flow or the secondary re-entrainment of collected materials.

[0026] Preferably, the organic light-emitting material recovery device includes a cavity stabilizing valve and a pressure balancing pipeline. The cavity stabilizing valve is located in the main chamber. One end of the pressure balancing pipeline is connected to the cavity stabilizing valve, and the other end of the pressure balancing pipeline is connected to the gas circulation pipeline. When the pressure in the main chamber is greater than the pressure in the pressure balancing pipeline, the cavity stabilizing valve opens; when the pressure in the main chamber is less than the pressure in the pressure balancing pipeline, the cavity stabilizing valve closes.

[0027] In this technical solution, the negative pressure in the main chamber is dynamically maintained by the cavity stabilizing valve, ensuring the safe and reliable operation of the device.

[0028] Preferably, the pressure balancing pipeline is further provided with at least one exhaust outlet, which is closed when the exhaust outlet does not reach the preset pressure value, and discharges gas when the exhaust outlet reaches the preset pressure value.

[0029] In this technical solution, the exhaust outlet is designed to direct the gas out under overpressure conditions where the internal circulation cannot be balanced, thus completely eliminating the risk of overpressure operation of the device.

[0030] Preferably, the organic light-emitting material recycling device includes an anti-static ionization device, which is installed in the main chamber and / or the internal space of the material precipitation container.

[0031] In this technical solution, the electrostatic ion removal device neutralizes the surface charge of the material, solving the problem of organic materials adsorbing onto the main chamber, material sedimentation container, and pipes after stripping due to material properties and electrostatic adsorption. This effectively reduces material adhesion loss on the walls and inside the pipes, significantly improves the material recovery rate, and facilitates system cleaning and maintenance.

[0032] Preferably, the main frame further includes an observation window and several operation bags. The observation window is made of transparent material, the bottom of the operation bags is closed, the opening of the operation bags is installed on the observation window, the opening of the operation bags faces outward, and the operation bags extend into the main chamber.

[0033] In this technical solution, by setting up an observation window and an operating bag, operators can observe the internal working conditions in real time and make adjustments through the operating bag without compromising the chamber's airtightness and clean environment, which greatly improves the convenience, safety and process controllability of operation.

[0034] Preferably, the main frame further includes material inlet and outlet doors located on both sides of the main frame; when the material inlet and outlet doors are open, the main chamber is connected to the external space; when the material inlet and outlet doors are closed, the main chamber is isolated from the external space.

[0035] In this technical solution, when it is necessary to put the anti-collision plate into the main chamber, the material inlet and outlet are opened and the anti-collision plate is put in; before the stripping operation, the material inlet and outlet are closed to make the main chamber a sealed state.

[0036] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of the present invention.

[0037] The positive and progressive effects of this invention are as follows:

[0038] The aforementioned organic light-emitting material recycling device operates entirely within a fully enclosed space. The gas circulates continuously between the main chamber and the material collection unit via a gas circulation pipeline, preventing contact with the external environment. This effectively avoids the introduction of external moisture, oxygen, and dust, fundamentally solving industry problems such as material loss, cross-contamination, and purity degradation caused by open-type operations. It boasts outstanding advantages such as high operating efficiency, high recovery rate, good purity of recycled materials, and safe and reliable operation, providing advanced process equipment for the sustainable utilization of organic light-emitting materials. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the organic light-emitting material recycling device of the present invention.

[0040] Figure 2 for Figure 1 The diagram shows a three-dimensional structure of the organic light-emitting material recycling device.

[0041] Explanation of reference numerals in the attached figures

[0042] Main Frame 1

[0043] Main chamber 11

[0044] Supporting mesh plate 2

[0045] Hole 21

[0046] Dry ice generator 3

[0047] Dry ice machine 31

[0048] Dry ice spray gun 32

[0049] Material sedimentation container 4

[0050] Gas circulation pipeline 5

[0051] Inlet end 51

[0052] 52 air outlet

[0053] First branch pipeline 53

[0054] Second branch pipeline 54

[0055] Material Collection Unit 6

[0056] Primary Collection Unit 61

[0057] Cyclone 611

[0058] Level 1 Collection Box 612

[0059] First air intake 613

[0060] First air outlet 614

[0061] Secondary collection unit 62

[0062] Secondary collection box 621

[0063] Second air intake 622

[0064] Second air outlet 623

[0065] Filter element 624

[0066] Pulse dust collector 625

[0067] Fan 7

[0068] Heating gas pipeline 8

[0069] Gas heating element 9

[0070] Cavity stabilizer valve 10

[0071] Pressure balancing pipeline 20

[0072] Exhaust outlet 201

[0073] 30 electrostatic ion removal devices

[0074] Observation window 40

[0075] operation bag 50

[0076] 501 bag opening

[0077] Material entry and exit gate 60 Detailed Implementation

[0078] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0079] like Figures 1 to 2The image shows an embodiment of the organic light-emitting material recycling device of the present invention. The device includes a main frame 1, a support mesh plate 2, a dry ice generator 3, a material sedimentation container 4, a gas circulation pipeline 5, multiple sets of material collection units 6, and a fan 7. A sealed main chamber 11 is formed within the main frame 1. The support mesh plate 2 is placed horizontally within the main chamber 11 and is used to hold a protective plate against the attached organic light-emitting material. The nozzle of the dry ice generator 3 is located within the main chamber 11, above and facing the support mesh plate 2. The material sedimentation container 4 is located below the support mesh plate 2. The support mesh plate 2 has several vertically penetrating perforations 21, which connect to... The gas circulation pipe 5 is connected to the internal space of the material sedimentation container 4; the inlet end 51 of the gas circulation pipe 5 is connected to the bottom of the material sedimentation container 4, and the outlet end 52 of the gas circulation pipe 5 is connected to the main chamber 11. The outlet end 52 of the gas circulation pipe 5 is located above the support mesh plate 2; the material collection unit 6 is connected to the gas circulation pipe 5. The gas in the gas circulation pipe 5 enters the material collection unit 6 through the inlet of the material collection unit 6, and the gas in the material collection unit 6 re-enters the gas circulation pipe 5 through the outlet of the material collection unit 6; the fan 7 is installed on the gas circulation pipe 5 and is located between the material collection unit 6 and the outlet end 52 of the gas circulation pipe 5.

[0080] In use, the anti-fouling plate with the attached organic luminescent material is placed on the support mesh plate 2. The dry ice generator 3 sprays high-pressure dry ice onto the support mesh plate 2. The high-pressure dry ice not only has strong physical kinetic energy at the moment of impact, but its low temperature (about -78.5℃) also makes the organic material brittle. The volume expansion force generated by sublimation further destroys the bonding force between the material and the substrate, thereby achieving efficient and thorough peeling. The peeled organic material falls into the material sedimentation container 4. The fan 7 is started, forming a negative pressure airflow in the gas circulation pipe 5, which draws the peeled organic material into the gas circulation pipe 5 from the air inlet 51. Under the action of the airflow, it is sent to the material collection unit 6 for capture and sedimentation.

[0081] The core advantage of this material recycling device lies in the fact that the entire recycling process takes place within a completely enclosed space. The gas circulates continuously between the main chamber 11 and the material collection unit 6 via the gas circulation pipeline 5, without contacting the external environment. This effectively prevents the introduction of external moisture, oxygen, and dust, ensuring the high purity of the recycled organic materials. It is particularly suitable for recycling optoelectronic materials such as OLEDs, where extremely high purity is required.

[0082] The main frame 1 can be constructed from various metal plates, such as aluminum profiles, stainless steel plates, aluminum composite panels, or alloys. Sealing strips and other sealing components are installed between the metal plates to ensure a high degree of airtightness in the main chamber 11, preventing the diffusion and loss of expensive organic materials and ensuring operational safety. During normal operation, the main chamber 11 is a negative pressure chamber, further ensuring that any possible leakage is drawn inwards rather than escaped outwards.

[0083] The dry ice generator 3 includes a dry ice machine 31 and a dry ice spray gun 32. The dry ice spray gun 32 is located inside the main chamber 11 and above the supporting mesh plate 2. The type and size of the dry ice machine 31 can be set according to actual needs. The dry ice spray gun 32 can move within the main chamber 11, enabling targeted and uniform cleaning of large areas or irregularly shaped protective plates, improving the flexibility and coverage of the peeling process.

[0084] like Figure 1 As shown, the material settling container 4 has a vertical central axis. The vertical distance between the inner circumferential surface of the material settling container 4 and the central axis gradually decreases in the direction away from the supporting mesh plate 2. The air inlet 51 of the gas circulation pipe 5 is located at the lowest point of the material settling container 4. The inner circumferential surface of the material settling container 4 has a certain inclination angle, forming a funnel, inverted triangle, or inverted cone shape. Utilizing the gravity self-aggregation effect, the falling organic material is quickly concentrated towards the bottom center, making it easier for the organic material falling into the material settling container 4 to accumulate at the very bottom of the material settling container 4. This facilitates the extraction of the organic material from the air inlet 51 of the gas circulation pipe 5, greatly optimizing the extraction efficiency and reducing the residue of organic material on the container wall of the material settling container 4.

[0085] like Figure 1 As shown, the material collection unit 6 includes a primary collection unit 61 and a secondary collection unit 62. In this embodiment, there are two primary collection units 61 and one secondary collection unit 62. The secondary collection unit 62 is located downstream of the primary collection unit 61, following the airflow direction. In other embodiments, the number and installation order of the primary collection units 61 and secondary collection units 62 can be set according to actual needs, and other types of material collection units can also be used. This multi-stage, series-connected, coarse-to-fine collection strategy enables the graded and efficient capture of materials with different particle sizes ranging from tens of micrometers to submicrometers.

[0086] The primary collection unit 61 employs centrifugal separation and includes a cyclone separator 611 and a primary collection box 612 located below the cyclone separator 611. The inlet of the primary collection unit 61 is the first air inlet 613 located on the upper end face of the cyclone separator 611, and the outlet of the primary collection unit 61 is the first air outlet 614 located on the upper end face of the cyclone separator 611. The lower end of the cyclone separator 611 is connected to the primary collection box 612. Airflow containing organic materials enters the cyclone separator 611 and forms a rotating airflow under the guidance of the guide vanes. Due to the density difference between the gas and the organic materials, the organic materials are thrown against the cylinder wall under centrifugal force and slide down the cylinder wall to the bottom, where they are collected by the primary collection box 612. The clean gas is discharged from the first air outlet 614 of the cyclone separator 611 and flows back into the gas circulation pipeline 5. The primary collection unit 61 can collect approximately 80% to 90% of the organic materials in the airflow, with low power consumption, large processing capacity, and no need for filter media, thus avoiding clogging problems.

[0087] The secondary collection unit 62 includes a secondary collection box 621. The inlet of the secondary collection unit 62 is the second air inlet 622 of the secondary collection box 621, and the outlet of the secondary collection unit 62 is the second air outlet 623 of the secondary collection box 621. A filter element 624 is installed inside the secondary collection box 621, with the second air inlet 622 and the second air outlet 623 located on opposite sides of the filter element 624. After collection by the primary collection unit 61, a small amount of residual organic material remains in the airflow. This residual organic material can be collected by the secondary collection box 621 when it passes through the secondary collection box 621. Specifically, after the airflow carrying organic material enters the secondary collection box 621 through the second air inlet 622, the organic material adheres to the filter element 624 when it passes through the filter element 624. The clean gas is then discharged from the second air outlet 623 and flows back into the gas circulation pipeline 5.

[0088] The filter element 624 is a filter screen or filter bag, with a mesh size of 600 to 1500 mesh. Filter elements 624 in this mesh size range can filter organic materials more effectively.

[0089] The secondary collection unit 62 also includes a pulse dust collector 625, which is connected to the secondary collection box 621. The pulse dust collector 625 can send pulse airflow to the filter element 624 at a set frequency. By sending pulse airflow to the filter element 624 through the pulse dust collector 625, organic materials on the filter element 624 can be shaken off into the secondary collection box 621 at regular intervals, automatically cleaning the filter element 624, maintaining stable air resistance and collection efficiency during long-term system operation, and extending the maintenance cycle.

[0090] The preferred frequency setting is 30-60 seconds per cycle. When the pulse dust collector 625 sends a pulse airflow to the filter element 624 at the set frequency of 30-60 seconds per cycle, it can fully utilize the airflow backflushing to effectively remove the material on the filter element 624 of the secondary collection box 621, thereby enabling the high-purity recovery of nearly 98% of the organic light-emitting material on the vapor-deposited anti-fouling plate.

[0091] The secondary collection unit 62 serves as a fine filtration unit. Fine particles remaining in the airflow after primary collection are efficiently intercepted when passing through the filter element 624 with a mesh size of 600 to 1500, ensuring the cleanliness of the discharged gas while capturing the most valuable high-purity fine materials.

[0092] Both the primary collection unit 61 and the secondary collection unit 62 are located outside the main chamber 11. After the organic material in the primary collection unit 61 and the secondary collection unit 62 is full, they can be replaced or cleaned directly from the outside without opening the main chamber 11. This design fundamentally avoids the risk of contamination or damage to the airtightness of the main chamber 11 due to maintenance operations, and is key to ensuring the purity and consistency of recycled materials between batches.

[0093] like Figure 1 As shown, the organic light-emitting material recovery device also includes a heating gas pipeline 8. The inlet of the heating gas pipeline 8 is connected to the blower 7, and the outlet of the heating gas pipeline 8 is connected to the main chamber 11. A gas heating element 9 is installed on the heating gas pipeline 8. During the stripping operation, the temperature control in the main chamber 11 needs to be precisely controlled within the process requirements. If the temperature does not meet the requirements, the gas heating element 9 needs to be activated, and the heating gas will be directly replenished into the main chamber 11 through the heating gas pipeline 8. The gas heating element 9 can be a resistance thermometer heater, with a temperature control range of 100-300℃, and the maximum operating temperature must not exceed 300℃. To ensure the heating effect, the gas heating element 9 is located at the end of the heating gas pipeline 8 closest to the main chamber 11, so that the distance of the heated gas entering the main chamber 11 is minimized, avoiding heat loss.

[0094] like Figure 1 As shown, the gas circulation pipeline 5 has two outlets 52, which are located on the top and side walls of the main chamber 11. In other embodiments, the number of outlets 52 can also be multiple. The number and location of the outlets 52 are designed according to the actual volume of the main chamber 11 and the required airflow rate and direction. This multi-outlet design is beneficial for forming a uniform and controllable airflow field in the main chamber 11, which can smoothly guide the dispersed organic material after peeling to the material sedimentation container 4, and avoid the disordered adhesion of organic material in the main chamber 11 caused by local eddies.

[0095] like Figure 1 As shown, the gas circulation pipeline 5 branches in the middle, forming a first branch pipeline 53 and a second branch pipeline 54. The material collection unit 6 and the fan 7 are located on the first branch pipeline 53, and the second branch pipeline 54 is directly connected to the inlet end 51 and the outlet end 52 of the gas circulation pipeline 5. By setting up two branches, when the airflow is large, part of the airflow can be diverted and directly returned to the main chamber 11 from the second branch pipeline 54. This bypass design provides precise flow regulation capability; when the processing volume is large, part of the airflow can be diverted to ensure that the airflow velocity entering the collection unit is always in the optimal efficiency range, preventing a decrease in collection efficiency or secondary re-entrainment of collected materials due to excessive flow.

[0096] like Figure 1 As shown, the organic light-emitting material recovery device includes a cavity stabilizing valve 10 and a pressure balancing pipeline 20. The cavity stabilizing valve 10 is located inside the main chamber 11. One end of the pressure balancing pipeline 20 is connected to the cavity stabilizing valve 10, and the other end is connected to the gas circulation pipeline 5. When the pressure in the main chamber 11 is greater than the pressure in the pressure balancing pipeline 20, the cavity stabilizing valve 10 opens; when the pressure in the main chamber 11 is less than the pressure in the pressure balancing pipeline 20, the cavity stabilizing valve 10 closes. The cavity stabilizing valve 10 can be a semi-open valve or a pneumatic butterfly valve.

[0097] When the pressure in the main chamber 11 is greater than the pressure in the pressure balancing pipeline 20, the chamber stabilizing valve 10 opens, allowing the airflow in the main chamber 11 to flow into the pressure balancing pipeline 20 and return to the gas circulation pipeline 5. The chamber stabilizing valve 10 dynamically maintains the stability of the negative pressure in the main chamber 11, ensuring the safe and reliable operation of the device.

[0098] like Figure 1 As shown, the pressure balancing pipeline 20 is also equipped with at least one exhaust outlet 201. The exhaust outlet 201 is closed when the preset pressure value is not reached, and exhausts gas when the preset pressure value is reached. If the pressure value in the main chamber 11 is too high and cannot be resolved by internal circulation balancing, the exhaust outlet 201 can be opened to discharge gas to the outside. The exhaust outlet 201, in the case of overpressure where internal circulation cannot balance, directs the gas out, completely eliminating the risk of overpressure operation of the device.

[0099] like Figure 1As shown, the organic light-emitting material recovery device also includes an antistatic ionizer 30, which is installed inside the main chamber 11 and the material sedimentation container 4. The antistatic ionizer 30 neutralizes the surface charge of the material, solving the problem of the stripped organic material adsorbing onto the main chamber 11, the material sedimentation container 4, and the pipes due to its material properties and electrostatic adsorption. This effectively reduces material adhesion loss on the walls and in the pipes, significantly improves the material recovery rate, and facilitates system cleaning and maintenance.

[0100] like Figure 1 and Figure 2 As shown, the main frame 1 also includes an observation window 40 and several operation bags 50. The observation window 40 is made of transparent material. The bottom of the operation bags 50 is closed, and the opening 501 of the operation bags 50 is installed on the observation window 40, with the opening 501 of the operation bags 50 facing outwards. The operation bags 50 extend into the main chamber 11. The observation window 40 is made of transparent material, such as tempered glass or PVC with a thickness of 10-15mm. The operator can observe the internal condition of the main chamber 11 at any time through the observation window 40. The operation bags 50 can be made of nitrile or latex. The operator can reach into the operation bag 50 through the opening 501 of the operation bag 50 to adjust the anti-fall plate inside the main chamber 11. During the adjustment process, the main chamber 11 remains sealed and does not need to be opened. By placing the operation bags 50 on the observation window 40, the operator can observe the internal condition of the main chamber 11 through the observation window 40 while adjusting the anti-fall plate, making operation convenient. By setting up an observation window 40 and an operating bag 50, operators can observe the internal working conditions in real time and make adjustments through the operating bag without compromising the chamber's airtightness and clean environment, greatly improving the convenience, safety, and process controllability of the operation.

[0101] like Figure 1 and Figure 2 As shown, the main frame 1 also includes material inlet / outlet gates 60, which are located on both sides of the main frame 1. When the material inlet / outlet gates 60 are open, the main chamber 11 is connected to the external space; when the material inlet / outlet gates 60 are closed, the main chamber 11 is isolated from the external space. When it is necessary to put the anti-stick plate into the main chamber 11, the material inlet / outlet gates 60 are opened and the anti-stick plate is put in; before the stripping operation, the material inlet / outlet gates 60 are closed, making the main chamber 11 a sealed state. The material inlet / outlet gates 60 are provided on both sides of the main frame 1. The bidirectional inlet / outlet design of the material inlet / outlet gates 60 optimizes the material flow path, facilitates assembly line operation, and improves overall production efficiency.

[0102] The organic light-emitting material recycling process of the above-mentioned organic light-emitting material recycling device is as follows: Open the material inlet / outlet 60 and place the anti-sticking plate with attached organic light-emitting material onto the support mesh plate 2 of the main chamber 11; close the material inlet / outlet 60 to make the main chamber 11 sealed; the dry ice generator 3 sprays high-pressure dry ice onto the support mesh plate 2, so that the material attached to the anti-sticking plate is peeled off from the anti-sticking plate under the impact of the high-pressure dry ice and the action of the dry ice properties, and the peeled organic material falls into the material sedimentation container 4; the air inlet 51 of the gas circulation pipeline 5 draws the peeled organic material into the gas circulation pipeline 5, and under the action of the airflow, the organic material in the gas circulation pipeline 5 is sequentially sent to the primary collection unit 61 and the secondary collection unit 62, and precipitates in the primary collection box 612 and the secondary collection box 621. The primary collection box 612 can collect approximately 80-90% of the organic material. The remaining 10-20% of the material will continue to flow with the gas to the secondary collection box 621. The secondary collection box 621 is equipped with a high-mesh filter 624, which ultimately completely separates the organic material from the gas, completing the collection of the organic material. After all the anti-adhesion plates have been peeled off, the main chamber 11 will be purged. Normal air purging or dry ice mixed purging can be selected to ensure that the material in the main chamber 11 can enter the primary collection box 612 and the secondary collection box 621 for deposition. Finally, the material in the primary collection box 612 and the secondary collection box 621 will be collected and sealed separately.

[0103] The aforementioned organic light-emitting material recycling device, through a series of innovative designs including fully enclosed physical stripping, multi-stage high-efficiency collection, intelligent airflow and pressure control, precise temperature control, and anti-static design, can recover nearly 98% of the organic light-emitting materials on the vapor-deposited anti-fouling plate with high purity. This device fundamentally solves industry problems such as material loss, cross-contamination, and purity degradation caused by open operations. It boasts outstanding advantages such as high operating efficiency, high recovery rate, good purity of recovered materials, and safe and reliable operation, providing advanced process equipment for the sustainable utilization of organic light-emitting materials.

[0104] This invention is not limited to the embodiments described above. Any changes in shape or structure shall fall within the protection scope of this invention. The protection scope of this invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of this invention, but all such changes and modifications shall fall within the protection scope of this invention.

Claims

1. An organic light-emitting material recycling device, characterized in that, include: The main frame, within which a sealed main chamber is formed; A support mesh plate is placed horizontally within the main cavity. The support mesh plate is used to place a protective plate for attaching organic light-emitting materials. A dry ice generator, wherein the nozzle of the dry ice generator is located in the main chamber, and the nozzle of the dry ice generator is located above the support mesh plate and facing the support mesh plate; A material sedimentation container is located below the supporting mesh plate, and the supporting mesh plate is provided with a plurality of vertically penetrating perforations, the perforations being connected to the internal space of the material sedimentation container; A gas circulation pipeline, wherein the inlet end of the gas circulation pipeline is connected to the bottom of the material sedimentation container, the outlet end of the gas circulation pipeline is connected to the main chamber, and the outlet end of the gas circulation pipeline is located above the support mesh plate. At least one set of material collection units, the material collection units being connected to the gas circulation pipeline, the gas in the gas circulation pipeline entering the material collection unit through the inlet of the material collection unit, and the gas in the material collection unit re-entering the gas circulation pipeline through the outlet of the material collection unit; A fan is installed on the gas circulation pipeline, and the fan is located between the material collection unit and the gas outlet of the gas circulation pipeline.

2. The organic light-emitting material recycling device as described in claim 1, characterized in that: The material sedimentation container is provided with a vertical central axis. The vertical distance between the inner circumferential surface of the material sedimentation container and the central axis gradually decreases in the direction away from the supporting mesh plate. The air inlet of the gas circulation pipeline is located at the lowest point of the material sedimentation container.

3. The organic light-emitting material recycling device as described in claim 1, characterized in that: The material collection unit includes a primary collection unit, and the number of primary collection units is one or more. The primary collection unit includes a cyclone and a primary collection box located below the cyclone. The inlet of the primary collection unit is a first air inlet located on the upper end face of the cyclone, and the outlet of the primary collection unit is a first air outlet located on the upper end face of the cyclone. The lower end of the cyclone is connected to the primary collection box.

4. The organic light-emitting material recycling device as described in claim 1, characterized in that: The material collection unit includes a secondary collection unit, and the number of the secondary collection units is one or more; the secondary collection unit includes a secondary collection box, the inlet of the secondary collection unit is the second air inlet of the secondary collection box, the outlet of the secondary collection unit is the second air outlet of the secondary collection box, and the interior of the secondary collection box is provided with a filter element, with the second air inlet and the second air outlet located on both sides of the filter element.

5. The organic light-emitting material recycling device as described in claim 4, characterized in that: The secondary collection unit also includes a pulse dust collector, which is connected to the secondary collection box and can send pulse airflow to the filter element at a set frequency.

6. The organic light-emitting material recycling device as described in claim 5, characterized in that: The set frequency is 30-60 seconds per cycle.

7. The organic light-emitting material recycling device as described in claim 1, characterized in that: The organic light-emitting material recycling device also includes a heating gas pipeline, the inlet of which is connected to the fan, and the outlet of which is connected to the main chamber. A gas heating element is provided on the heating gas pipeline.

8. The organic light-emitting material recycling device as described in claim 1, characterized in that: The gas circulation pipeline has multiple outlets, which are located on the top or side walls of the main chamber.

9. The organic light-emitting material recycling device as described in claim 1, characterized in that: The gas circulation pipeline branches in the middle to form a first branch pipeline and a second branch pipeline; the material collection unit and the fan are located on the first branch pipeline, and the second branch pipeline is directly connected to the inlet and outlet of the gas circulation pipeline.

10. The organic light-emitting material recycling device as described in claim 1, characterized in that: The organic light-emitting material recovery device includes a cavity stabilizing valve and a pressure balancing pipeline. The cavity stabilizing valve is located in the main chamber. One end of the pressure balancing pipeline is connected to the cavity stabilizing valve, and the other end of the pressure balancing pipeline is connected to the gas circulation pipeline. When the pressure in the main chamber is greater than the pressure in the pressure balancing pipeline, the cavity stabilizing valve opens; when the pressure in the main chamber is less than the pressure in the pressure balancing pipeline, the cavity stabilizing valve closes.

11. The organic light-emitting material recycling device as described in claim 10, characterized in that: The pressure balancing pipeline is also provided with at least one exhaust outlet. The exhaust outlet is closed when the preset pressure value is not reached, and the exhaust outlet discharges gas when the preset pressure value is reached.

12. The organic light-emitting material recycling device as described in claim 1, characterized in that: The organic light-emitting material recycling device includes an anti-static ionization device, which is installed in the main chamber and / or the internal space of the material precipitation container.

13. The organic light-emitting material recycling device as described in claim 1, characterized in that: The main frame also includes an observation window and several operation bags. The observation window is made of transparent material. The bottom of the operation bags is closed, and the opening of the operation bags is installed on the observation window. The opening of the operation bags faces outward, and the operation bags extend into the main chamber.

14. The organic light-emitting material recycling device as described in claim 1, characterized in that: The main frame also includes material inlet and outlet doors, which are located on both sides of the main frame; when the material inlet and outlet doors are open, the main chamber is connected to the external space; when the material inlet and outlet doors are closed, the main chamber is isolated from the external space.

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