Cold and hot double air flow drying system

Abstract

The present application provides a cold and hot air flow drying system, comprising an air feeder, a plurality of vortex tube modules, a hot air storage barrel, a first air blower, a first hot air knife body, a cold air storage barrel, a second air blower, a first cold air knife body and a controller. The air feeder is used to receive external air and pass through an air filter module to output clean air. Each of the plurality of vortex tube modules has an air inlet port, a hot air outlet port and a cold air outlet port. The air inlet port of each of the plurality of vortex tube modules is connected to the air feeder to receive clean air, and the corresponding hot air outlet port and cold air outlet port respectively output hot air and cold air. The side of the hot air storage barrel has a plurality of pressure multipliers and is respectively connected to the hot air outlets of the plurality of vortex tube modules to store hot air. The side of the cold air storage barrel is connected to the cold air outlets of the plurality of vortex tube modules to store cold air.

Description

Technical Field

[0001] This invention relates to an air knife system, and more particularly to a dual-flow drying system capable of simultaneously generating cold and hot air knives. Background Technology

[0002] The process of cleaning the glass substrate and circuit board of flat panel displays is mainly carried out by spraying cleaning solution onto the substrate surface. When using this cleaning device to clean the substrate, it is necessary to remove the residual cleaning solution on the substrate and dry the substrate at the same time. For example, if there is residual cleaning solution on the substrate after the cleaning process, water spots will appear on its surface, which may become a factor that reduces the cleaning quality. Therefore, the cleaned substrate must be dried in order to carry out the next processing procedure.

[0003] Most existing substrate drying methods use air knives to dry the cleaning solution. The main principle of an air knife is to generate high-pressure air by producing a high-speed airflow, thereby quickly drying the substrate. Specifically, an air knife has an air inlet and an air outlet on its body. By changing the structural dimensions of the air inlet and outlet, the airflow entering through the air inlet becomes a high-speed airflow that is blown out through the air outlet, thus creating the air knife effect. In existing air knife structures, the upper half of the air knife body has a narrow, elongated flow channel leading to the smallest air chamber, serving as the air outlet. Mounting holes are located on both sides of the narrow flow channel, allowing screws to be passed through these holes and secured to the body. The width of the narrow flow channel is adjusted by tightening the screws, thereby controlling the airflow. However, during operation, the screws can easily get stuck and become unable to adjust the tightness after the air knife is heated and deformed. In some cases, the screws may even break or be damaged due to excessive operation, which will affect the performance of the air knife. Furthermore, the screws are installed on the narrow flow channel. When the airflow in the air chamber flows to the outside of the narrow flow channel, it will be blocked by the screws, resulting in uneven airflow and affecting the drying effect.

[0004] In existing technology, the high-pressure air used to dry the aforementioned panels is generated by "air knives" located at the top and bottom. An "air knife" is a component with a suitable internal space and a very narrow air outlet. High-pressure air is introduced into this internal space and then ejected at high speed from the outlet, forming a blade-shaped "air surface." This air surface dries the moisture on the top and bottom of the panel. Traditional air knife structures are formed by bending a single piece of metal sheet or by extruding aluminum into a structure with one end in a cylindrical shape and the other in a wedge shape. Both ends of the metal sheet together form the wedge-shaped end, and a slit-like air outlet is formed at the wedge end. One end of the air knife is sealed, and high-pressure air enters from the other end and is then blown out through the outlet to form a blade-shaped air surface. However, in traditional air knife structures, when high-pressure air is forced out of the wide, round tube through the outlet, the pressure of the high-pressure air pushes against the wedge-shaped sidewalls, causing the outlet width to widen and thus reducing the air velocity. It can even cause the wedge-shaped sidewalls to vibrate, resulting in unstable high-pressure air pressure. Furthermore, the aforementioned traditional air knife blows out cold air to remove moisture from the workpiece before sending it into the drying equipment. As a result, if the moisture on the workpiece is not completely removed before being sent to the drying equipment, watermarks will remain after drying where residual moisture remains.

[0005] Furthermore, while existing air knives can effectively remove moisture from thicker traditional boards, their application to increasingly thinner boards with high-pressure air can cause excessive bending, leading to jamming during transport. In addition, the drying of circuit boards and glass substrates requires significant amounts of electricity and compressed air. Given the demands for energy conservation and global carbon reduction, energy saving has become a necessary direction for industrial development.

[0006] Therefore, how to solve the problems and deficiencies of the existing technologies is the research topic that relevant industry players are eager to develop. Summary of the Invention

[0007] This invention proposes a dual-flow hot and cold air drying system that can simultaneously generate hot and cold air, store and apply hot and cold air knives to the drying process of the workpiece, thereby significantly improving the production qualification rate, reducing production costs and energy consumption. By greatly reducing or eliminating the use of electric heaters, the existing drying equipment requires up to 6 sets of 5KW electric heaters, which will result in very high energy consumption for drying. At the same time, the use of electric heaters also affects the airflow channel of the drying air and generates a lot of oxidation dust.

[0008] This invention provides a dual-flow hot and cold air drying system, particularly for drying a sheet metal component. The dual-flow hot and cold air drying system includes a blower, multiple vortex tube modules, a hot air storage tank, a first blower, a first hot air knife body, a cold air storage tank, a second blower, the first cold air knife body, and a controller. The blower has an internal air filtration module, which receives external air and outputs clean air through the filtration module. Each of the multiple vortex tube modules has an air inlet, a hot air inlet, and a cold air inlet. Each air inlet of the multiple vortex tube modules is connected to the blower to receive clean air, and outputs hot air and cold air respectively through the corresponding hot air inlet and cold air inlet. The hot air storage tank has multiple pressure multipliers on its side, which are connected to the hot air outlets of the multiple vortex tube modules to store hot air. The hot air storage tank also has a hot air outlet. The first blower is connected to the hot air outlet of the hot air storage tank and is used to transport the hot air. The first hot air knife body is connected to the first blower to receive hot air, and has a first hot air knife inlet and a first hot air knife outlet. A cold air storage tank is connected to the side of multiple vortex tube modules for storing cold air, and the cold air storage tank has a cold air outlet. A second blower is connected to the cold air outlet of the cold air storage tank and is used to transport cold air. The first cold air knife body is connected to the second blower to receive cold air, and has a first cold air knife inlet and a first cold air knife outlet. A controller is connected to the first and second blowers, and is used to control at least the gas flow rate, gas pressure, gas temperature, and operating frequency.

[0009] In one embodiment of the present invention, the dual-flow hot and cold air drying system further includes a third blower, a second hot air knife body, a fourth blower, and a second cold air knife body. The third blower is connected to the controller and the first hot air return outlet of the first hot air knife body, and is used to transport hot air. The second hot air knife body is connected to the third blower to receive hot air, and has a second hot air knife inlet and a second hot air knife outlet. The fourth blower is connected to the controller and the first cold air return outlet of the first cold air knife body, and is used to transport cold air. The second cold air knife body is connected to the fourth blower to receive cold air, and has a second cold air knife inlet and a second cold air knife outlet.

[0010] In one embodiment of the present invention, the hot and cold dual-flow drying system further includes a first pressure detector, which is connected to the hot air storage tank and the controller. The first pressure detector is used to detect the gas pressure in the hot air storage tank.

[0011] In one embodiment of the present invention, the hot and cold airflow drying system further includes a second pressure detector, which is connected to the cold air storage tank and the controller. The second pressure detector is used to detect the gas pressure in the cold air storage tank.

[0012] In one embodiment of the present invention, the hot and cold dual-flow drying system further includes a first temperature detector, which is connected to the hot air storage tank and the controller. The first temperature detector is used to detect the gas temperature in the hot air storage tank.

[0013] In one embodiment of the present invention, the hot and cold airflow drying system further includes a second temperature detector, which is connected to the cold air storage tank and the controller. The second temperature detector is used to detect the gas temperature in the cold air storage tank.

[0014] In one embodiment of the present invention, the hot and cold dual-flow drying system further includes a first flow rate detector, which is connected to the hot air storage tank and the controller. The first flow rate detector is used to detect the gas flow rate in the hot air storage tank.

[0015] In one embodiment of the present invention, the hot and cold dual-flow drying system further includes a second flow rate detector, which is connected to the cold air storage tank and the controller. The second flow rate detector is used to detect the gas flow rate in the cold air storage tank.

[0016] In one embodiment of the present invention, the first cold air knife outlet of the first cold air knife body is composed of a first cold air outlet and a first cold air return outlet, wherein the first cold air outlet has positive pressure and the first cold air return outlet has negative pressure, so as to induce the surrounding airflow and thus multiply and accelerate the output airflow of the first cold air outlet, wherein the cold air returned by the first cold air return outlet is transported to the second cold air knife inlet of the second cold air knife body by a fourth blower.

[0017] In one embodiment of the present invention, the first hot air knife outlet of the first hot air knife body is composed of a first hot air outlet and a first hot air return outlet, wherein the first hot air outlet has positive pressure and the first hot air return outlet has negative pressure, so as to induce the surrounding airflow and thus multiply and accelerate the output airflow of the first hot air outlet, wherein the hot air returned by the first hot air return outlet is transported to the second hot air knife inlet of the second hot air knife body by a third blower.

[0018] In one embodiment of the present invention, if the gas pressure in the hot air storage tank exceeds a first preset gas pressure threshold, the controller will control the hot air storage tank to perform a pressure relief operation.

[0019] In one embodiment of the present invention, if the gas pressure in the cold air storage tank exceeds the second preset gas pressure threshold, the controller will control the cold air storage tank to perform a depressurization operation.

[0020] In one embodiment of the present invention, the hot and cold dual-flow drying system further includes an ultrasonic resonator. The ultrasonic resonator is connected to a controller, a first hot air knife body, a first cold air knife body, a second hot air knife body, and a second cold air knife body. The ultrasonic resonator generates ultrasonic waves under the control of the controller to make the plate resonate, thereby causing water molecules to be vibrated out from the deep holes of the plate.

[0021] In summary, the hot and cold dual-flow drying system disclosed in this invention has the following advantages:

[0022] 1. Simultaneously generates hot air knives and cold air knives;

[0023] 2. It can be modularly and mirror-expanded into multiple sets of hot air knives and multiple sets of cold air knives;

[0024] 3. After high-temperature drying, it can be quickly cooled to remove water marks and improve the pass rate of subsequent processes;

[0025] 4. Reduce production costs and energy consumption.

[0026] The following detailed description through specific embodiments will make it easier to understand the purpose, technical content, features and effects achieved by the present invention. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the architecture of the hot and cold dual-flow drying system of the present invention.

[0028] Figure 2 This is another schematic diagram of the cold and hot dual-flow drying system of the present invention.

[0029] Figure 3 This is another schematic diagram of the cold and hot dual-flow drying system of the present invention.

[0030] Figure 4 This is a schematic diagram of the structure of the first hot air knife outlet of the first hot air knife body of the present invention.

[0031] Figure 5 This is a schematic diagram of the structure of the first cold air knife outlet of the first cold air knife body of the present invention.

[0032] Figure 6 This is a schematic diagram illustrating the application of the hot and cold dual-flow drying system of the present invention.

[0033] Explanation of reference numerals in the attached diagram: 100 - Dual-flow drying system (hot and cold air); 111 - Air filter module; 110 - Blower; 120 - Vortex tube module; 121 - Air inlet; 122 - Hot air inlet; 123 - Cold air inlet; 130 - Hot air storage tank; 131 - Pressure multiplier; 132 - Hot air outlet; 140 - First blower; 150 - First hot air knife body; 151A - First hot air knife inlet; 151B - First hot air return outlet; 152 - First hot air knife outlet; 152A - First hot air outlet; 152B - First hot air return outlet; 155 - Pressure roller; 160 - Cold air storage tank; 162 - Cold air outlet; 170 - Second blower; 180 - First cold air knife body; 181A - First cold air knife inlet; 181B - First cold air recirculation outlet; 182 - First cold air knife outlet; 182A - First cold air outlet; 182B - First cold air recirculation outlet; 185 - Pressure roller; 190 - Controller; 210 - First pressure sensor; 220 - Second pressure sensor; 310 - First temperature sensor; 320 - Second temperature sensor; 410 - First flow rate sensor; 420 - Second flow rate sensor; 510 - Third blower; 520 - Second hot air knife body; 521A - Second hot air knife inlet; 522 - Second hot air knife outlet; 530 - Fourth blower; 540 - Second cold air knife body; 541A - Second cold air knife inlet; 542 - Second cold air knife outlet; 610 - Ultrasonic resonator; AG - Hot air; BG - Cold air; CG - Clean air; EXG - Outside air; PA - Parts. Detailed Implementation

[0034] In order to solve the many problems caused by the use of air knives in the drying process of existing boards, the inventor has conducted years of research and development to improve the shortcomings of existing products. The following will introduce in detail how the present invention achieves the most efficient functional requirements with a dual hot and cold airflow drying system.

[0035] Please see Figure 1 , Figure 1 This is a schematic diagram of the architecture of the hot and cold dual-flow drying system of the present invention. As shown in the figure, the hot and cold dual-flow drying system 100 disclosed herein can efficiently generate, store, and apply hot or cold air into the equipment simultaneously, especially for drying a plate, wherein the plate is a thin plate or a thick plate, and the plate is a circuit board or a glass substrate. The hot and cold dual-flow drying system 100 includes a blower 110, multiple vortex tube modules 120, a hot air storage tank 130, a first blower 140, a first hot air knife body 150, a cold air storage tank 160, a second blower 170, a second cold air knife body 180, and a controller 190. In this embodiment, the hot air knife and the cold air knife have a high degree of automatic adjustment capability to achieve the best fluid effect of the drying device.

[0036] Regarding the air supply unit 110, the air supply unit 110 has at least one air filter module 111 inside, which is used to filter out dirt and dust from the outside air. The air supply unit 110 receives outside air EXG and outputs clean air CG through the air filter module 111. Regarding the vortex tube modules 120, each of the plurality of vortex tube modules 120 has an air inlet 121, a hot air inlet 122, and a cold air inlet 123. Each air inlet 121 of the plurality of vortex tube modules 120 is connected to the air supply unit 110 to receive clean air CG, and outputs hot air AG and cold air BG respectively through the corresponding hot air inlet 122 and cold air inlet 123. In this embodiment of the invention, the hot and cold dual-flow drying system 100 has a row or array of vortex tube modules 120, which can utilize the principle of vortex tubes to simultaneously generate hot air AG or cold air BG. That is, by injecting gas into one end of the vortex tube, hot air and cold air will be discharged from the other end. This is a method of generating hot and cold airflows by utilizing the difference in laminar angular velocity of airflow. Next, we will further explain how to effectively and safely store the hot air AG or cold air BG generated by the vortex tube module 120.

[0037] Regarding the hot air storage tank 130, in this embodiment of the invention, the hot air storage tank 130 has multiple pressure multipliers 131 on its side, which are respectively connected to the hot air inlets 122 of multiple vortex tube modules 120 to store hot air AG. The hot air storage tank 130 also has a hot air outlet 132. That is, the hot air AG generated by the vortex tube module 120 passes through the pressure multipliers 131 and then enters the interior of the hot air storage tank 130 to be stored. Next, regarding the first blower 140, the first blower 140 is connected to the hot air outlet 132 of the hot air storage tank 130. The first blower 140 is used to transport and compress the hot air AG. Regarding the first hot air knife body 150, the first hot air knife body 150 is connected to the first blower 140 to receive the hot air AG. The first hot air knife body 150 has a first hot air knife inlet 151A and a first hot air return outlet 151B (illustrated in...). Figure 2The hot air AG stored in the hot air tank 130 is directed to the first hot air knife outlet 152. Further, when the hot air AG is to be used, through the control program of the switch and the action of the first blower 140, the hot air AG flows out from the hot air outlet 132 of the hot air tank 130 and enters the first hot air knife body 150 via the first blower 140. Due to the compressed hot air AG and the design of the diameter of the first hot air knife body 150, the hot air AG flows out from the first hot air knife outlet 152 of the first hot air knife body 150 at a certain flow rate, thereby performing a hot air drying process on the workpiece to remove a large amount of moisture. In the above process, the gas temperature and gas flow rate of the hot air AG can be pre-designed or dynamically adjusted by the designer based on environmental parameters or component parameters.

[0038] In embodiments of the hot and cold dual-flow drying system 100 of the present invention, it can also simultaneously generate a cold air knife to rapidly cool down the board that is at a high temperature after the hot air drying process, so as to avoid the presence of any water marks or other undesirable substances. In other words, in the manufacturing of printed circuit boards and other boards, they must generally go through multiple wet processes before entering the subsequent processes; based on the quality requirements, the residual moisture on the board must be completely removed after the wet process and before entering the subsequent processes, otherwise the residual water droplets or even water marks will affect the pass rate of the subsequent processes. Traditionally, removing residual moisture from the aforementioned boards after a wet process requires two steps: blowing and drying. The blowing process involves using high-pressure air at an angle to blow moisture onto the top and bottom of the board during transport, thoroughly removing any remaining moisture. The board then enters the drying process to completely dry it before proceeding to subsequent processes. If the moisture is not completely removed during the blowing process, or if the board is allowed to cool naturally (slowly), watermarks will remain after drying, inevitably affecting the yield rate of subsequent processes. The following section will further explain the operation of the cold air knife in the hot and cold dual-flow drying system 100 to rapidly cool and completely remove watermarks.

[0039] Regarding the cold air storage tank 160, its side is connected to the cold air inlets 123 of multiple vortex tube modules 120 to store cold air BG. The cold air storage tank 160 also has a cold air outlet 162. That is, the cold air BG generated by the vortex tube modules 120 directly enters the interior of the cold air storage tank 160 for storage. Regarding the second blower 170, it is connected to the cold air outlet 162 of the cold air storage tank 160. The second blower 170 is used to transport and compress the cold air BG. Regarding the second cold air blade body 180, it is connected to the second blower 170 to receive cold air BG. The second cold air blade body 180 has a first cold air blade inlet 181A and a first cold air return outlet 181B (illustrated in...). Figure 2 The first cold air knife outlet 182 is connected to the cold air storage tank 160. Furthermore, when the cold air BG stored in the cold air storage tank 160 is to be used, through the control program of the switch and the action of the second blower 170, the cold air BG flows out from the cold air outlet 162 of the cold air storage tank 160 and enters the first cold air knife body 180 via the second blower 170. Due to the compressed cold air BG and the design of the diameter of the first cold air knife body 180, the cold air BG flows out from the first cold air knife outlet 182 of the first cold air knife body 180 at a certain flow rate, thereby enabling a rapid cooling process for the board. In the above process, the gas temperature and gas flow rate of the cold air BG can be pre-designed or dynamically adjusted by the designer based on environmental parameters or component parameters.

[0040] Next, please refer to Figure 2 , Figure 2 This is another schematic diagram of the hot and cold dual-flow drying system of the present invention. First, regarding the controller 190, the controller 190 is connected to the first blower 140, the second blower 170, the third blower 510, and the fourth blower 530. The controller 190 is used to control at least the gas flow rate, gas pressure, gas temperature, and operating frequency of the hot air AG or cold air BG (the hot and cold dual-flow drying system 100 has a frequency conversion effect). In another embodiment, the controller 190 can also be connected to a remote control system via a built-in wireless radio frequency module and the Internet for remote adjustment and control (not shown). The hot and cold dual-flow drying system 100 of the present invention can be further expanded with hot air blades or cold air blades, and their number is not limited. For example, such as... Figure 2As shown, the dual-flow hot and cold air drying system 100 also includes a third blower 510, a second hot air knife body 520, a fourth blower 530, and a second cold air knife body 540. The third blower 510 is connected to the controller 190 and the first hot air return outlet 151B of the first hot air knife body 150, and is used to transport hot air AG to the second hot air knife inlet 521A of the second hot air knife body 520. The second hot air knife body 520 is connected to the third blower 510 to receive hot air AG, and has a second hot air knife inlet 521A and a second hot air knife outlet 522. The fourth blower 530 is connected to the controller 190 and the first cold air return outlet 181B of the first cold air knife body 180, and is used to transport cold air BG to the second cold air knife inlet 541A of the second cold air knife body 540. The second cold air knife body 540 is connected to the fourth blower 530 to receive cold air BG. The second cold air knife body 540 has a second cold air knife inlet 541A and a second cold air knife outlet 542. The above-described expansion embodiment uses two hot air knife bodies 150 and 520 and two cold air knife bodies 180 and 540 as examples. In practical applications, N hot air knife bodies and N cold air knife bodies can be used for expansion, where N is a positive integer greater than one, for example, 10 sets of hot air knife bodies and 10 sets of cold air knife bodies.

[0041] Next, please refer to Figure 3 , Figure 3 This is another schematic diagram of the hot and cold dual-flow drying system of the present invention. The hot and cold dual-flow drying system 100 also includes a first pressure detector 210, a second pressure detector 220, a first temperature detector 310, a second temperature detector 320, a first flow rate detector 410, a second flow rate detector 420, and an ultrasonic resonator 610. The first pressure detector 210 is connected to the hot air storage tank 130 and the controller 190, and is used to detect the gas pressure in the hot air storage tank 130. The second pressure detector 220 is connected to the cold air storage tank 160 and the controller 190, and is used to detect the gas pressure in the cold air storage tank 160. Furthermore, if the gas pressure inside the hot air storage tank 130 exceeds the first preset pressure threshold, the controller 190 will control the hot air storage tank 130 to perform a pressure relief operation. The first preset pressure threshold can be set by the designer according to the actual situation or requirements. If the gas pressure inside the cold air storage tank 160 exceeds the second preset pressure threshold, the controller 190 will control the cold air storage tank 160 to perform a pressure relief operation. The second preset pressure threshold can be set by the designer according to the actual situation or requirements.

[0042] Furthermore, a first temperature detector 310 is connected to the hot air storage tank 130 and the controller 190, and is used to detect the gas temperature inside the hot air storage tank 130. A second temperature detector 320 is connected to the cold air storage tank 160 and the controller 190, and is used to detect the gas temperature inside the cold air storage tank 160. Moreover, the gas temperatures inside the hot air storage tank 130 and the cold air storage tank 160 can be designed by the designer according to actual conditions or requirements. In one embodiment, the gas temperature can be as high as 120 degrees Celsius (inside the hot air storage tank 130) or as low as -10 degrees Celsius (inside the cold air storage tank 160), but is not limited to these values. Additionally, a first flow rate detector 410 is connected to the hot air storage tank 130 and the controller 190. The first flow rate detector 410 is used to detect the gas flow rate inside the hot air storage tank 130. In another embodiment, the first flow rate detector 410 is further connected to the first hot air knife body 150 to detect the gas flow rate at the outlet 152 of the first hot air knife (not shown). A second flow rate detector 420 is connected to the cold air storage tank 160 and the controller 190. The second flow rate detector 420 is used to detect the gas flow rate inside the cold air storage tank 160. In another embodiment, the second flow rate detector 420 is further connected to the first cold air knife body 180 to detect the gas flow rate at the outlet 182 of the first cold air knife (not shown). In addition to controlling the gas flow rate by controlling the first blower 140 and the second blower 170 via the controller 190, the gas flow rate can also be controlled by the inlet and outlet diameters of the first hot air knife body 150 and the first cold air knife body 180. Finally, the ultrasonic resonator 610 is connected to the controller 190, the first hot air knife body 150, the first cold air knife body 180, the second hot air knife body 520, and the second cold air knife body 540. The ultrasonic resonator 610 generates ultrasonic waves under the control of the controller 190, causing the plate to resonate, thereby vibrating water molecules out from the deep holes of the plate. This further allows the air knife to perform a more complete drying process. The ultrasonic resonator 610 itself has a power supply and an oscillator, which is connected to the pressure rollers of the first hot air knife body 150 and the first cold air knife body 180. Further details can be found by referring to... Figures 3 to 5 , Figure 4 This is a schematic diagram of the structure of the first hot air knife outlet of the first hot air knife body of the present invention. Figure 5 This is a schematic diagram of the structure of the first cold air knife outlet of the first cold air knife body of the present invention. The ultrasonic waves generated by the ultrasonic resonator 610 will cause the pressure rollers 155 and 185 to resonate, thereby causing the plate PA to resonate, wherein the pressure rollers 155 and 185 are in contact with the plate PA.

[0043] exist Figure 4 and Figure 5It should be noted that the hot air knife outlet 152 of the first hot air knife body 150 is composed of a first hot air outlet 152A and a first hot air return outlet 152B. The first hot air outlet 152A has positive pressure, and the first hot air return outlet 152B has negative pressure, thereby inducing the surrounding airflow to multiply and accelerate the output airflow of the first hot air outlet 152A. In this embodiment, as... Figure 4 As shown, the first hot air knife body 150 of the hot and cold dual airflow drying system 100 is performing a high-temperature drying process on a plate PA. The pressure roller 155 moves on the plate PA (the pressure roller 155 may or may not contact the plate PA) and also has a hot air guiding effect. Hot air AG flows out quickly from the first hot air outlet 152A to dry the plate PA, and the hot air will return from the first hot air return outlet 152B and flow back into the first hot air knife body 150. Then, the third blower 510 draws the hot air AG out from the first hot air knife body 150 through the first hot air return outlet 151B and transports the hot air AG to the second hot air knife inlet 521A of the second hot air knife body 520. This design allows the first hot air outlet 152A to exhibit positive pressure and the first hot air return outlet 152B to exhibit negative pressure (the second hot air knife outlet 522 of the second hot air knife body 520 also has the same design, but the hot air AG drawn back by it is drawn back by the third blower 510), further increasing the gas velocity and gas flow rate of the first hot air outlet 152A, thereby increasing the drying effect through high-speed airflow.

[0044] On the other hand, the cold air outlet 182 of the first cold air knife body 180 is composed of a first cold air outlet 182A and a first cold air return outlet 182B, wherein the first cold air outlet 182A has positive pressure and the first cold air return outlet 182B has negative pressure, so as to induce the surrounding environmental airflow and thus multiply and accelerate the output airflow of the first cold air outlet 182A. In this embodiment, as Figure 5As shown, the first cold air knife body 180 of the hot and cold airflow drying system 100 is performing a rapid cooling process on a board PA that has just passed through the drying process of the first hot air knife body 150. The pressure roller 185 moves on the board PA (the pressure roller 185 may or may not contact the board PA) and also has a cold air guiding effect. The cold air BG flows out rapidly from the first cold air outlet 182A to rapidly cool the board PA, and the cold air will return from the first cold air return outlet 182B and flow back into the first cold air knife body 180. Then, the fourth blower 530 draws the cold air BG out from the first cold air knife body 180 through the first cold air return outlet 181B and transports the cold air BG to the second cold air knife inlet 541A of the second cold air knife body 540. This design allows the first cold air outlet 182A to exhibit positive pressure and the first cold air return outlet 182B to exhibit negative pressure (the second cold air knife outlet 542 of the second cold air knife body 540 has the same design, but the cold air BG drawn back is drawn back by the fourth blower 530), further multiplying the gas velocity and flow rate of the first cold air outlet 182A, thereby increasing the drying effect through high-speed airflow. In this way, the first cold air knife body 180 rapidly cools the board PA, and together with the second cold air knife body 540, they can generate high-speed blowing and suction airflow, removing moisture from the holes in the board PA. Through the above control of gas temperature, gas pressure, gas velocity, and operating frequency, the hot and cold dual-flow drying system 100 can be applied not only to thick boards but also to thin boards. When high-pressure air acts on thin boards, it will not cause excessive bending of the boards, thus preventing board jamming during transport.

[0045] Please refer to Figure 6 , Figure 6 This is a schematic diagram illustrating the application of the hot and cold dual-flow drying system of the present invention. In one specific embodiment, after the board PA undergoes a wet process, it enters a drying process. During the drying process, the board PA is dried by a set of hot and cold dual-flow drying systems 100 on the left and right or top and bottom. The overall operating mechanism is as follows: Figures 1 to 5 The board PA dried by the hot and cold dual-flow drying system 100 of the present invention can almost completely remove the moisture from the board PA without leaving any watermarks.

[0046] In summary, the hot and cold dual-flow drying system disclosed in this invention has the following advantages:

[0047] 1. Simultaneously generates hot air knives and cold air knives;

[0048] 2. It can be modularly and mirror-expanded into multiple sets of hot air knives and multiple sets of cold air knives;

[0049] 3. After high-temperature drying, it can be quickly cooled to remove water marks and improve the pass rate of subsequent processes;

[0050] 4. Reduce production costs and energy consumption.

[0051] The above description is illustrative only and not restrictive of the present invention. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the claims, and all such modifications, variations or equivalents will fall within the protection scope of the present invention.

Claims

1. A dual-flow (hot and cold) air drying system for drying a sheet of material, characterized in that, include: A blower having an internal air filter module, the blower receiving external air and passing it through the air filter module to output clean air; Multiple vortex tube modules, each having an air inlet, a hot air inlet and a cold air inlet, each of the multiple vortex tube modules being connected to the blower to receive the clean air, and outputting a hot air and a cold air respectively at the corresponding hot air inlet and cold air inlet. A hot air storage tank has multiple pressure multipliers on its side, which are respectively connected to the hot air inlets of the multiple vortex tube modules to store the hot air, wherein the hot air storage tank has a hot air outlet. A first blower is connected to the hot air outlet of the hot air storage tank, and the first blower is used to transport the hot air; A first hot air knife body is connected to the first blower to receive the hot air, and the first hot air knife body has a first hot air knife inlet and a first hot air knife outlet. A cold air storage tank is connected to the cold air inlet of the plurality of vortex tube modules to store the cold air, wherein the cold air storage tank has a cold air outlet. A second blower is connected to the cold air outlet of the cold air storage tank, and the second blower is used to transport the cold air; A first cold air knife body is connected to the second blower to receive the cold air, and the first cold air knife body has a first cold air knife inlet and a first cold air knife outlet. A controller connected to the first blower and the second blower, the controller being used to control at least a gas flow rate, a gas pressure, a gas temperature and an operating frequency; A third blower is connected to the controller and a first hot air return outlet of the first hot air knife body. The third blower is used to transport the hot air. A second hot air knife body is connected to the third blower to receive the hot air. The second hot air knife body has a second hot air knife inlet and a second hot air knife outlet. A fourth blower, connected to the controller and a first cold air return outlet of the first cold air knife body, the fourth blower being used to transport the cold air; and A second cold air knife body is connected to the fourth blower to receive the cold air. The second cold air knife body has a second cold air knife inlet and a second cold air knife outlet. The first cold air knife outlet of the first cold air knife body is composed of a first cold air outlet and a first cold air return outlet. The first cold air outlet has positive pressure and the first cold air return outlet has negative pressure to induce the surrounding airflow, thereby multiplying and accelerating the output airflow of the first cold air outlet. The cold air returned by the first cold air return outlet is transported to the second cold air knife inlet of the second cold air knife body by the fourth blower. The first hot air knife outlet of the first hot air knife body is composed of a first hot air outlet and a first hot air return outlet. The first hot air outlet has positive pressure and the first hot air return outlet has negative pressure to induce the surrounding airflow, thereby multiplying and accelerating the output airflow of the first hot air outlet. The hot air returning from the first hot air return outlet is transported to the second hot air knife inlet of the second hot air knife body by the third blower.

2. The dual-flow drying system with hot and cold air as described in claim 1, characterized in that, It also includes a first pressure detector, which is connected to the hot air storage tank and the controller, and the first pressure detector is used to detect the gas pressure in the hot air storage tank.

3. The hot and cold dual-flow drying system as described in claim 1, characterized in that, It also includes a second pressure detector, which is connected to the cold air storage tank and the controller, and the second pressure detector is used to detect the gas pressure in the cold air storage tank.

4. The dual-flow drying system with hot and cold air as described in claim 1, characterized in that, It also includes a first temperature detector, which is connected to the hot air storage tank and the controller, and the first temperature detector is used to detect the temperature of the gas in the hot air storage tank.

5. The hot and cold dual-flow drying system as described in claim 1, characterized in that, It also includes a second temperature sensor, which is connected to the cold air storage tank and the controller, and the second temperature sensor is used to detect the temperature of the gas in the cold air storage tank.

6. The hot and cold dual-flow drying system as described in claim 1, characterized in that, It also includes a first flow rate detector, which is connected to the hot air storage tank and the controller, and the first flow rate detector is used to detect the gas flow rate in the hot air storage tank.

7. The dual-flow drying system with hot and cold air as described in claim 1, characterized in that, It also includes a second flow rate detector, which is connected to the cold air storage tank and the controller. The second flow rate detector is used to detect the gas flow rate in the cold air storage tank.

8. The dual-flow drying system with hot and cold air as described in claim 1, characterized in that, If the gas pressure inside the hot air storage tank exceeds a first preset pressure threshold, the controller will control the hot air storage tank to perform a pressure relief operation.

9. The hot and cold dual-flow drying system as described in claim 1, characterized in that, If the gas pressure inside the cold air storage tank exceeds a second preset pressure threshold, the controller will control the cold air storage tank to perform a pressure relief operation.

10. The hot and cold dual-flow drying system as described in claim 1, characterized in that, Also includes: An ultrasonic resonator is connected to the controller, the first hot air knife body, the first cold air knife body, the second hot air knife body, and the second cold air knife body. The ultrasonic resonator generates ultrasonic waves under the control of the controller to make the plate resonate, thereby causing water molecules to be shaken out from the deep holes of the plate.

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