An adjustable air knife mechanism

Abstract

This utility model discloses an adjustable air knife mechanism, comprising: an air knife body, including a housing and an air outlet structure disposed at the bottom of the housing for blowing airflow onto the surface of a perovskite film; the housing having at least one air inlet for connection to an external hot air device and an air cavity communicating with the air inlet; the air outlet structure including a nozzle plate and an air outlet adjustment assembly, wherein an air outlet slit is formed between the nozzle plate and the air outlet end of the housing, arranged along the length direction of the air knife body and communicating with the air cavity; the air outlet adjustment assembly connecting the nozzle plate and the housing; a height adjustment device, mounted on a coating machine and pivotally connected to the end of the air knife body; and an angle adjustment device, disposed on the height adjustment device and pivotally connected to the end of the air knife body. The beneficial effects of this application are: the height, angle, and width of the air outlet slit can be freely adjusted; the airflow is uniform; and production efficiency and product quality are improved.

Description

Technical Field

[0001] This utility model belongs to the field of air knife technology, specifically relating to an adjustable air knife mechanism, and particularly an adjustable air knife mechanism applied to a slot coating machine. Background Technology

[0002] Perovskite solar cells have become the mainstream technology for new solar cells due to their advantages such as high photoelectric conversion efficiency, low material cost, and high energy density. In the perovskite photovoltaic cell manufacturing industry, coating equipment applies a wet film of perovskite solution to the substrate surface using methods such as slot coating, spin coating, or blade coating. The wet film is then dried to form a coating. The uniformity of the perovskite film is one of the key factors affecting its performance. During the preparation process, the drying quality of the perovskite film directly affects its uniformity, and thus the overall performance of the cell. Therefore, coating and drying are crucial in the manufacturing process.

[0003] In existing technologies, air knives are commonly used to dry perovskite thin films. This is achieved by using a high-intensity airflow from the air knife mechanism to form an air curtain that rapidly dries the wet film coated on the substrate. The uniformity of the airflow velocity from the air knife directly affects the drying quality of the perovskite thin film. Although existing air knife technology can basically meet the drying requirements of perovskite thin films, with the continuous increase in the size of photovoltaic modules (such as large-size silicon wafers and glass substrates), traditional coating and drying mechanisms still need to further improve the uniformity of the airflow from the air knife to improve the quality of the perovskite thin film and thus promote the improvement of the photoelectric conversion efficiency of perovskite solar cells.

[0004] For example, Chinese patent CN222469639U discloses an air knife mechanism for a coating machine. It mainly adjusts the distance and angle of the air knife by setting a first control unit and a second control unit, respectively. However, it lacks a mechanism for adjusting the width of the air outlet slit, making it difficult to ensure the drying uniformity of large-sized substrates and affecting film quality. When it is necessary to adjust the width of the air outlet slit, it can only be achieved by replacing air knives with different slit widths. Replacing air knives with different slit widths requires preparing multiple air knives and disassembling the device, wasting manpower, resources, and time, and increasing costs.

[0005] Therefore, there is an urgent need for an adjustable air knife mechanism that can freely adjust the height, angle, and width of the air outlet slit, ensure uniform airflow, and improve production efficiency and product quality. Utility Model Content

[0006] In view of the shortcomings of the prior art described above, this application provides an adjustable air knife mechanism that can freely adjust the height, angle, and width of the air outlet slit, ensure uniform airflow, and improve production efficiency and product quality.

[0007] To solve the above problems, the technical solution adopted in this application is:

[0008] An adjustable air knife mechanism includes:

[0009] The air knife body includes a housing and an air outlet structure disposed at the bottom of the housing for blowing airflow onto the surface of a perovskite thin film. The housing has at least one air inlet for connecting to an external hot air device and an air cavity communicating with the air inlet. The air outlet structure includes a nozzle plate and an air outlet adjustment assembly. An air outlet slit is formed between the nozzle plate and the air outlet end of the housing, arranged along the length direction of the air knife body and communicating with the air cavity. The air outlet adjustment assembly connects the nozzle plate and the housing and is used to adjust the relative position of the nozzle plate and the housing to adjust the size of the air outlet slit.

[0010] A height adjustment device, mounted on the coating machine and pivotally connected to the end of the air knife body, is used to drive the air knife body to rise and fall; and

[0011] An angle adjustment device is mounted on the height adjustment device and pivotally connected to the end of the air knife body. It is used to adjust the swing angle of the air knife body to adjust the air outlet angle of the air outlet slit.

[0012] As a preferred embodiment of this application, the housing includes a first chamber housing, a second chamber housing, and side sealing plates connecting the first chamber housing and the second chamber housing. The first chamber housing, the second chamber housing, and the two side sealing plates are tightly connected and assembled together to form a housing. A nozzle plate is connected to the air outlet side of the first chamber housing, and the nozzle plate and the air outlet side of the second chamber housing form an air outlet slit. At least one of the side sealing plates is provided with an air inlet.

[0013] As a preferred embodiment of this application, air inlets are symmetrically arranged on the two side sealing plates, so that air enters symmetrically on both sides of the air knife body, eliminating the problem of airflow attenuation due to air entering from one side.

[0014] As a preferred embodiment of this application, a sealing gasket is provided between the side sealing plate and the end faces of the first chamber shell and the second chamber shell along the length direction to ensure the airtightness of the chamber and prevent air leakage.

[0015] As a preferred embodiment of this application, at least one groove is provided on the inner wall of both the first chamber shell and the second chamber shell, spaced vertically apart. An air distribution plate is installed in each groove, located below the air inlet, and has several air distribution holes. The air distribution plate serves to equalize and stabilize the airflow, and, in conjunction with the symmetrical air inlets on both sides of the air knife body, ensures a uniform distribution of the outlet airflow.

[0016] As a preferred embodiment of this application, the air cavity is provided with multiple parallel air distribution plates.

[0017] As a preferred embodiment of this application, the air outlet adjustment assembly includes multiple slit width adjustment parts for driving the nozzle plate closer to or further away from the second chamber housing in the width direction of the air knife body, and multiple anti-detachment guide parts for guiding the nozzle plate to move in the width direction of the air knife body. The multiple slit width adjustment parts and the multiple anti-detachment guide parts are arranged at equal intervals and crosswise in the length direction of the air knife body. The crosswise distribution of the slit width adjustment parts and the anti-detachment guide parts achieves uniform adjustment of the air outlet slit width, avoids local deviations, and supports single-point or multi-point synchronous adjustment to adapt to different process requirements, enabling uniform adjustment of the air outlet slit for larger-sized air knives.

[0018] As a preferred embodiment of this application, the slit width adjustment part includes an adjustment boss disposed on the first chamber housing, an adjustment groove disposed on the nozzle plate for fitting with the adjustment boss, and a slit adjustment bolt connecting the first chamber housing and the nozzle plate. The adjustment boss has a threaded hole, and the adjustment groove has a mounting hole corresponding to the threaded hole on the adjustment boss. The slit adjustment bolt is installed in the threaded hole and the mounting hole aligned in the width direction of the air knife body. By adjusting the installation depth of the slit adjustment bolt, the relative position of the nozzle plate and the first chamber housing in the width direction of the air knife body is adjusted, thereby adjusting the width of the air outlet slit. The width of the air outlet slit can be adjusted by pushing and pulling through the threaded hole and the mounting hole aligned in the width direction of the air knife body using a high-precision slit adjustment bolt.

[0019] As a preferred embodiment of this application, the anti-detachment guide includes an anti-detachment component detachably disposed on the first chamber housing and an anti-detachment groove disposed on the air nozzle plate and engaged with the anti-detachment component. The anti-detachment channel extends along the width direction of the air knife body. The anti-detachment component has an anti-detachment head and a connecting tail. The anti-detachment head is movably inserted into the anti-detachment groove, and the connecting tail of the anti-detachment component is connected to the first chamber housing.

[0020] As a preferred embodiment of this application, the anti-detachment groove includes an integrally formed vertical connecting section and a horizontal anti-detachment section. The connection between the connecting section and the anti-detachment section forms a stepped surface for blocking the anti-detachment head from entering the vertical connecting section. The top of the vertical connecting section extends upward to the upper edge of the nozzle plate to form a groove through which the connecting tail of the anti-detachment component passes.

[0021] As a preferred embodiment of this application, the anti-detachment groove has an inverted T-shaped cross-section.

[0022] As a preferred embodiment of this application, the anti-detachment groove extends along the width of the air knife body. During installation, the anti-detachment head of the anti-detachment component is movably inserted into the horizontal anti-detachment section of the anti-detachment groove, and its connecting tail passes through the groove and connects to the first chamber housing. Since the outer diameter of the anti-detachment head of the anti-detachment component is larger than the diameter of the vertical connecting section, the anti-detachment head can move within the horizontal anti-detachment section under the blocking effect of the stepped surface, and will not enter the vertical connecting section, thereby achieving vertical limitation between the air nozzle plate and the first chamber housing, while not hindering the movement of the air nozzle plate and the first chamber housing in the width direction of the air knife body.

[0023] As a preferred embodiment of this application, the height adjustment device includes a slide table and a transfer bracket. The slide table includes a base frame and a lifting drive unit disposed on the base frame. The transfer bracket is connected to the lifting drive unit and is used to drive the transfer bracket to rise and fall. The transfer bracket is pivotally connected to the end of the air knife body.

[0024] As a preferred embodiment of this application, the lifting drive unit includes a control screw and a sliding plate. The control screw is rotatably mounted on the base frame, and the sliding plate has an internal threaded hole. The control screw has an external thread for threaded engagement with the sliding plate, and the control screw passes through the threaded hole of the sliding plate and is threadedly connected to the sliding plate.

[0025] As a preferred embodiment of this application, the lifting drive unit further includes a drive device connected to the end of the control screw, which is used to drive the control screw to rotate, thereby driving the slide plate to move along the axis of the control screw.

[0026] As a preferred embodiment of this application, the driving device is a handwheel coaxially mounted on the end of the control screw, with a handle provided on the edge of the handwheel. This structure allows manual operation by cranking the handle to drive the handwheel, which in turn rotates the control screw, causing the slide plate to rise and fall. This enables precise adjustment or fine-tuning of the distance between the air knife body and the film, while also reducing costs.

[0027] Alternatively, the driving device may be a servo motor or other drive source, with the output shaft of the servo motor connected to a control screw via a coupling. In this structure, the servo motor's movement drives the control screw to rotate.

[0028] As a preferred embodiment of this application, the height adjustment device further includes a height measuring unit for measuring the height of the air knife body.

[0029] As a preferred embodiment of this application, the height measuring unit includes a digital display on the base frame, a height pointer on the slide plate, and a height scale line on the side of the base frame, for detecting the adjustment amount.

[0030] As a preferred embodiment of this application, the drive device further includes an adjustable set screw, which is mounted on the base frame and used to control the tightening and loosening of the screw. When it is necessary to adjust the height of the air knife body, the adjustable set screw can be loosened first, and the handwheel can be turned to rotate the control screw, thereby causing the slide to lift and lower the adapter bracket, thus adjusting the height of the air knife body. After the height adjustment is completed, the adjustable set screw is tightened to lock the control screw and prevent the air knife body from shifting during operation. The adjustable set screw allows the operator to tighten or loosen the bolt using the handle.

[0031] As a preferred embodiment of this application, the angle adjustment device includes an adapter shaft, a cam bearing follower, and an angle adjustment section. The adapter shaft is connected to the side plate, and the angle adjustment section is connected to the cam bearing follower. The cam bearing follower is installed at the end of the adapter shaft. One end of the adapter shaft is connected to the end of the air knife body, and the other end is equipped with the cam bearing follower. The angle adjustment section is disposed on the adapter bracket and connected to the cam bearing follower.

[0032] As a preferred embodiment of this application, the angle adjustment unit includes a rotating shaft, a fine-pitch ball head bolt, and a fine-pitch nut. The rotating shaft is connected to the adapter bracket via a second bearing and a second elastic retaining ring. A through hole is provided on the rotating shaft for the fine-pitch ball head bolt to pass through. The fine-pitch ball head bolt passes through the through hole, and washers and fine-pitch nuts are fitted onto the fine-pitch ball head bolts on both sides of the through hole. The ball head end of the fine-pitch ball head bolt is connected to the adapter shaft via a cam bearing follower. The combination of the fine-pitch ball head bolt, washer, and fine-pitch nut is used both to fix the angle adjustment unit and to adjust the angle of the air knife body. In use, when it is necessary to adjust the angle of the air knife body, the length of the fine-pitch ball head bolt passing through the through hole of the rotating shaft is adjusted, causing the air knife body to rotate around the axis of the first bearing to achieve angle adjustment.

[0033] As a preferred embodiment of this application, the angle adjustment device further includes an angle measuring device for measuring the swing angle of the air knife body.

[0034] As a preferred embodiment of this application, the angle measuring device includes an angle pointer fixedly mounted on an adapter shaft and an angle scale mounted on an adapter bracket. The angle scale is arc-shaped, and graduations representing the tilt angle are provided on its circumference. The angle pointer can rotate within a range of ±90°. When the air knife body is in a vertical position, the indicated position of the angle pointer is 0°; when the air knife body swings to its maximum angle, the indicated position of the angle pointer is 90°. The smallest graduation on the scale represents 5°. The real-time tilt angle of the air knife can be directly read by the position of the angle pointer relative to the angle scale on the adapter bracket. This method has a simple structure and low cost.

[0035] This utility model also provides a slot coating machine having the aforementioned adjustable air knife mechanism.

[0036] Compared with the prior art, the beneficial effects of this application are:

[0037] 1. The adjustable air knife mechanism provided by this utility model has a unique air knife body design, a height adjustment mechanism, and an angle adjustment mechanism, which respectively realize the adjustment of the air outlet slit width of the air knife body, the distance and angle between the air knife body and the surface of the film;

[0038] 2. This utility model eliminates the airflow attenuation problem of unilateral air intake by symmetrically introducing air on both sides of the air knife body. With the help of the air distribution plate set in the shell, it achieves uniform and stable flow, thereby realizing precise control of airflow speed and distribution, making the airflow distribution more uniform, significantly improving the uniformity of air outlet, ensuring consistent drying effect on large-size substrate surfaces, and significantly improving product quality and production efficiency.

[0039] 3. This utility model, through the air outlet adjustment component of the air knife body, can support single-point or multi-point synchronous adjustment to adapt to different process requirements. It can achieve uniform adjustment of the air outlet slit of large-size air knife, enabling the equipment to adapt to the drying requirements of large-size substrates. It solves the limitations of traditional fixed slit design and provides reliable technical support for the large-size development of the photovoltaic industry.

[0040] 4. The structure is simpler and the manufacturing cost is lower, while it can adapt to more types and is compatible with different coating speeds and coating thicknesses. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the adjustable air knife mechanism according to an embodiment of the present invention.

[0042] Figure 2 for Figure 1 A magnified view of part A.

[0043] Figure 3 for Figure 2 A magnified view of section B.

[0044] Figure 4 This is a schematic diagram of the structure of the air knife body according to an embodiment of the present invention.

[0045] Figure 5 This is a side view of an adjustable air knife mechanism according to an embodiment of the present invention.

[0046] Figure 6 This is an internal structural diagram of the air knife body according to an embodiment of the present invention.

[0047] Figure 7 for Figure 6 A magnified view of a portion of the image.

[0048] Figure 8 This is a front view of the air knife body according to an embodiment of the present invention.

[0049] Figure 9 This is a bottom view of the air knife body according to an embodiment of the present invention.

[0050] Figure 10 for Figure 8 GG cross-sectional view.

[0051] Figure 11 for Figure 9 A magnified view of a portion of the image.

[0052] In the attached image:

[0053] 1-Air knife body; 11-Shell; 111-Air inlet; 112-First chamber shell; 113-Second chamber shell; 114-Side sealing plate; 115-Sealing gasket; 116-Earth distribution plate; 12-Air outlet structure; 121-Nozzle plate; 122-Air outlet adjustment assembly; 123-Air outlet slit; 124-Slit width adjustment part; 1241-Adjusting boss; 1242-Adjusting groove; 1243-Slit adjustment bolt; 125-Anti-detachment guide part; 1251-Anti-detachment component; 1252-Anti-detachment groove;

[0054] 2-Height adjustment device; 21-Slide table; 211-Base frame; 2111-Guide rail; 212-Lifting drive unit; 2121-Control screw; 2122-Slide plate; 2123-Handwheel; 2124-Handle; 2125-Adjustable set handle screw; 22-Adapter bracket; 221-First bearing; 222-First elastic retaining ring; 23-Height adjustment unit; 231-Digital display; 232-Height pointer;

[0055] 3-Angle adjustment device; 31-Adapter shaft; 32-Cam bearing follower; 33-Angle adjustment part; 331-Rotating shaft; 332-Fine thread ball head bolt; 333-Fine thread nut; 334-Second bearing; 335-Second elastic retaining ring; 336-Washer; 34-Angle measuring instrument; 341-Angle pointer; 342-Angle scale. Detailed Implementation

[0056] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. This application can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application.

[0057] It should be noted that the process equipment or apparatus not specifically mentioned in the following embodiments are all conventional equipment or apparatus in the art.

[0058] Furthermore, it should be understood that the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, does not preclude the existence of other method steps before or after the combined steps, or the insertion of other method steps between these explicitly mentioned steps, unless otherwise stated. It should also be understood that the combined connection relationship between one or more devices / apparatus mentioned in this application does not preclude the existence of other devices / apparatus before or after the combined devices / apparatus, or the insertion of other devices / apparatus between these explicitly mentioned devices / apparatus, unless otherwise stated. Moreover, unless otherwise stated, the numbering of each method step is merely a convenient tool for identifying each method step, and not for limiting the order of the method steps or limiting the scope of implementation of this application. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of implementation of this application.

[0059] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0060] In the description of this application, it should be understood that the terms "upper," "lower," "left," "right," "inner," "outer," "axial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, features defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0062] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] The present application will be further described below with reference to specific embodiments, but the scope of protection of the present application is not limited thereto.

[0064] like Figures 1-11 As shown, the adjustable air knife mechanism of this utility model includes:

[0065] The air knife body 1 includes a housing 11 and an air outlet structure 12 disposed at the bottom of the housing 11 for blowing airflow onto the surface of a perovskite film. The housing 11 is provided with at least one air inlet 111 for connection to an external hot air device and an air cavity communicating with the air inlet 111. The air outlet structure 12 includes a nozzle plate 121 and an air outlet adjustment assembly 122. An air outlet slit 123 is formed between the nozzle plate 121 and the housing 11, arranged along the length direction of the air knife body 1 and communicating with the air cavity. The air outlet adjustment assembly 122 connects the nozzle plate 121 and the housing 11 and is used to adjust the relative position of the nozzle plate 121 and the housing 11 to adjust the size of the air outlet slit 123.

[0066] Height adjustment device 2, mounted on the coating machine and pivotally connected to the end of the air knife body 1, is used to drive the air knife body 1 to rise and fall; and

[0067] An angle adjustment device 3 is mounted on the height adjustment device 2 and pivotally connected to the end of the air knife body 1. It is used to adjust the swing angle of the air knife body 1 so as to adjust the air outlet angle of the air outlet slit 123.

[0068] like Figure 1 , Figure 9 , Figure 10As shown, the housing 11 includes a first chamber housing 112, a second chamber housing 113, and two side sealing plates 114 connecting the ends of the first chamber housing 112 and the second chamber housing 113. The first chamber housing 112, the second chamber housing 113, and the two side sealing plates 114 are tightly connected and assembled together to form a long strip-shaped housing 11. The air outlet side of the first chamber housing 112 is connected to a nozzle plate 121, and the nozzle plate 121 and the air outlet side of the second chamber housing 113 form an air outlet slit 123. An air inlet 111 is provided on the side sealing plate 114.

[0069] like Figure 4 As shown, air inlets 111 are symmetrically arranged on the two side sealing plates 114, so that air can enter symmetrically on both sides of the air knife body 1, eliminating the problem of airflow attenuation due to air entering from one side.

[0070] like Figure 4 As shown, a sealing gasket 115 is provided between the side sealing plate 114 and the end faces of the first chamber housing 112 and the second chamber housing 113 along the length direction to ensure the airtightness of the chamber and prevent air leakage.

[0071] like Figure 6 , Figure 7 As shown, at least one groove is provided on the inner wall of both the first chamber shell 112 and the second chamber shell 113. A uniform air distribution plate 116 is installed in the groove. The uniform air distribution plate 116 is located below the air inlet and has several uniform air distribution holes. The function of the uniform air distribution plate 116 is to equalize and stabilize the airflow, and together with the symmetrical air inlets on both sides of the air knife body, it can ensure a uniform distribution of the airflow.

[0072] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the air outlet adjustment assembly 122 includes a plurality of slit width adjustment parts 124 for driving the air nozzle plate 121 to move closer to or further away from the second chamber housing 113 along the width direction of the air knife body 1, and a plurality of anti-detachment guide parts 125 for guiding the air nozzle plate 121 to move along the width direction of the air knife body 1. The plurality of slit width adjustment parts 124 and the plurality of anti-detachment guide parts 125 are arranged alternately in the length direction of the air knife body 1.

[0073] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the slit width adjustment part 124 includes an adjustment boss 1241 disposed on the first chamber housing 112, an adjustment groove 1242 disposed on the nozzle plate 121 for fitting with the adjustment boss 1241, and a slit adjustment bolt 1243 connecting the first chamber housing 112 and the nozzle plate 121. The adjustment boss 1241 is provided with a threaded hole, and the adjustment groove 1242 is provided with a mounting hole corresponding to the threaded hole on the adjustment boss 1241. The slit adjustment bolt 1243 is installed in the threaded hole and the mounting hole aligned in the width direction of the air knife body 1. By adjusting the installation depth of the slit adjustment bolt 1243, the relative position of the nozzle plate 121 and the first chamber housing 112 in the width direction of the air knife body 1 is adjusted, thereby adjusting the width of the air outlet slit 123. During the adjustment process, a feeler gauge can be used to ensure the uniformity of the width of the air outlet slit.

[0074] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the anti-detachment guide part 125 includes an anti-detachment member 1251 detachably disposed on the first chamber housing 112 and an anti-detachment groove 1252 disposed on the nozzle plate 121 and engaged with the anti-detachment member 1251; the anti-detachment member 1251 has an anti-detachment head and a connecting tail, the anti-detachment head is movably inserted into the anti-detachment groove 1252, and the connecting tail of the anti-detachment member 1251 passes through the anti-detachment groove 1252 and is connected to the first chamber housing 112.

[0075] like Figure 3 , Figure 7 As shown, the anti-detachment groove 1252 includes an integrally formed vertical connecting section and a horizontal anti-detachment section. The connection between the connecting section and the anti-detachment section forms a stepped surface for blocking the anti-detachment head from entering the vertical connecting section. The top of the vertical connecting section extends upward to the upper edge of the nozzle plate to form a groove through which the connecting tail of the anti-detachment component passes.

[0076] like Figure 3 , Figure 7 As shown, the cross-section of the anti-detachment groove 1252 is an inverted T-shape.

[0077] like Figure 3 , Figure 7As shown, the anti-detachment groove 1252 extends along the width direction of the air knife body 1. During installation, the anti-detachment head of the anti-detachment component 1251 is movably inserted into the horizontal anti-detachment section of the anti-detachment groove 1252, and its connecting tail passes through the groove and connects to the first chamber housing 112. Since the outer diameter of the anti-detachment head of the anti-detachment component 1251 is larger than the diameter of the vertical connecting section, the anti-detachment head can move within the horizontal anti-detachment section under the blocking effect of the stepped surface, and will not enter the vertical connecting section. This achieves vertical limitation between the air nozzle plate 121 and the first chamber housing 112, while not hindering the movement of the air nozzle plate 121 and the first chamber housing 112 in the width direction of the air knife body 1.

[0078] like Figure 1 , Figure 2 and Figure 5 As shown, the height adjustment device 2 includes a slide table 21 and a transition bracket 22. The slide table 21 includes a base frame 211 and a lifting drive unit 212 disposed on the base frame 211. The lifting drive unit 212 is connected to the transition bracket 22 and is used to drive the transition bracket 22 to lift. The transition bracket 22 is pivotally connected to the end of the air knife body 1.

[0079] like Figure 2 and Figure 5 As shown, the lifting drive unit 212 includes a control screw 2121 and a sliding plate 2122. The control screw 2121 is rotatably mounted on the base frame 211, and the sliding plate 2122 is provided with an internal threaded hole. The control screw 2121 is provided with an external thread for threaded engagement with the sliding plate 2122. The control screw 2121 passes through the internal threaded hole of the sliding plate 2122 and is threadedly connected to the sliding plate 2122.

[0080] like Figure 2 As shown, a guide rail 2111 is provided on the base frame 211, and the slide plate 2122 is slidably mounted on the guide rail 2111. The height of the slide plate 2122 is adjusted by controlling the screw 2121.

[0081] like Figure 2 As shown, the adapter bracket 22 is L-shaped. The two ends of the air knife body 1 along its length are pivotally connected to one end of the adapter bracket 22 by the first bearing 221 and the first elastic retaining ring 222. The other end of the adapter bracket 22 is connected to the slide plate 2122.

[0082] like Figure 1 , Figure 2 and Figure 5As shown, the angle adjustment device 3 includes a transition shaft 31, a cam bearing follower 32, and an angle adjustment part 33. One end of the transition shaft 31 is pivotally connected to the end of the air knife body 1, and the other end is equipped with the cam bearing follower 32. The angle adjustment part 33 is connected to the cam bearing follower 32 and the transition bracket 22, and is used to adjust the swing angle of the air knife body 1.

[0083] like Figure 2 As shown, the lifting drive unit 212 also includes a drive device, which is connected to the end of the control screw 2121 and is used to drive the control screw 2121 to rotate, so as to drive the slide plate 2122 to move along the axis of the control screw 2121.

[0084] like Figure 2 As shown, the driving device is a handwheel 2123 coaxially mounted on the end of the control screw 2121, and a handle 2124 is provided on the edge of the handwheel 2123. This structure allows the handwheel 2123 to be manually driven by cranking the handle 2124, which in turn drives the control screw 2121 to rotate, thereby driving the slide plate 2122 to rise and fall. This enables precise adjustment or fine-tuning of the distance between the air knife body 1 and the film, while also reducing costs.

[0085] In some other embodiments of this application, the driving device is a servo motor or other driving source, and the output shaft of the servo motor is connected to a control screw via a coupling. This structure uses the movement of the servo motor to drive the rotation of the control screw.

[0086] like Figure 1 , Figure 5 As shown, the height adjustment device 2 also includes a height measuring unit 23 for measuring the height of the air knife body.

[0087] like Figure 1 , Figure 2 and Figure 5 As shown, the lifting drive unit 212 also includes an adjustable locking handle screw 2125 mounted on the base frame for controlling the tightening and loosening of the screw. When it is necessary to adjust the height of the air knife body, the adjustable locking handle screw 2125 can be loosened first, and the handwheel 2123 can be turned to drive the control screw 2121 to rotate, thereby causing the slide plate 2122 to drive the adapter bracket 22 to lift and lower, thereby adjusting the height of the air knife body 1; after the height of the air knife body 1 is adjusted, the adjustable locking handle screw 2125 is tightened to lock the control screw 2121 and prevent the air knife body 1 from shifting during operation; the adjustable locking handle screw 2125 is convenient for operators to tighten or loosen.

[0088] like Figure 1 , Figure 2As shown, the height measuring unit 23 is used to detect the adjustment amount. It includes a digital display 231 mounted on the base frame, a height pointer 232 mounted on the slide plate, and a height scale line mounted on the side of the base frame. The height pointer 232 is raised and lowered by the raising and lowering of the slide plate, thus directly indicating the lifting height of the air knife body, which is convenient for adjustment. The lifting height of the air knife body 1 can be directly displayed by the digital display 231.

[0089] like Figure 5 As shown, the angle adjustment unit 33 includes a rotating shaft 331, a fine-pitch ball head bolt 332, and a fine-pitch nut 333. The rotating shaft 331 is connected to the adapter bracket 22 via a second bearing 334 and a second elastic retaining ring 335. The rotating shaft 331 has a through hole for the fine-pitch ball head bolt 332 to pass through. The fine-pitch ball head bolt 332 passes through the through hole, and washers 336 and fine-pitch nuts 333 are fitted on the fine-pitch ball head bolts 332 on both sides of the through hole. The ball head end of the fine-pitch ball head bolt 332 is connected to the adapter shaft 31 via a cam bearing follower 32. The combination of the fine-pitch ball head bolt, washer, and fine-pitch nut is used both to fix the angle adjustment unit and to adjust the angle of the air knife body. In use, when it is necessary to adjust the angle of the air knife body, the length of the fine-pitch ball head bolt passing through the through hole of the rotating shaft is adjusted, causing the air knife body to rotate around the axis of the first bearing to achieve angle adjustment.

[0090] like Figure 5 As shown, the angle adjustment device 3 also includes an angle measuring device 34, used to measure the swing angle of the air knife body 1.

[0091] like Figure 5 As shown, the angle measuring device 34 includes an angle pointer 341 fixedly mounted on the adapter shaft and an angle scale 342 mounted on the adapter bracket. The angle scale is arc-shaped, and graduations representing the tilt angle are provided on its circumference. The angle pointer can rotate within a range of ±90°. When the air knife body is in a vertical state, the indicated position of the angle pointer is 0°; when the air knife body swings to its maximum angle, the indicated position of the angle pointer is 90°. The smallest graduation on the scale represents 5°. The real-time tilt angle of the air knife can be directly read by the position of the angle pointer relative to the angle scale on the adapter bracket. This method has a simple structure and low cost.

[0092] like Figure 5 As shown, the angle measuring device 34 also includes a set bolt 343, which is adapted to the threaded hole on the adapter shaft 31 for fixing the cam bearing follower 32.

[0093] The air knife mechanism provided by this utility model, through its unique air knife structural design, height adjustment mechanism, and angle adjustment mechanism, allows for the adjustment of the air knife outlet slit width, the distance and angle between the air knife and the substrate, respectively. This results in a simpler structure, lower manufacturing costs, and adaptability to a wider range of substrate types, accommodating different coating speeds and thicknesses, significantly improving product quality and production efficiency. In particular, the adjustable outlet slit design enables precise control of airflow speed and distribution, resulting in more uniform airflow and significantly improved airflow uniformity. This ensures consistent drying of large-size substrates, allowing the equipment to meet the drying needs of even larger substrates. It overcomes the limitations of traditional fixed slit designs and provides reliable technical support for the large-size development of the photovoltaic industry.

[0094] The above embodiments are for illustrating the implementation schemes disclosed in this application and should not be construed as limiting this application. Furthermore, various modifications listed herein, as well as variations in methods and compositions of the utility model, will be apparent to those skilled in the art without departing from the scope and spirit of this application. Although this application has been specifically described in conjunction with various specific preferred embodiments, it should be understood that this application should not be limited to these specific embodiments. In fact, various modifications as described above that are obvious to those skilled in the art to obtain the utility model should be included within the scope of this application.

Claims

1. An adjustable air knife mechanism, characterized in that, include: The air knife body (1) includes a housing (11) and an air outlet structure (12) disposed at the bottom of the housing (11) for blowing airflow onto the surface of the perovskite film. The housing (11) is provided with at least one air inlet (111) for connecting to an external hot air device and an air cavity communicating with the air inlet (111). The air outlet structure (12) includes a nozzle plate (121) and an air outlet adjustment assembly (122). An air outlet slit (123) is formed between the nozzle plate (121) and the housing (11) along the length direction of the air knife body (1) and communicating with the air cavity. The air outlet adjustment assembly (122) connects the nozzle plate (121) and the housing (11) and is used to adjust the relative position of the nozzle plate (121) and the housing (11) to adjust the size of the air outlet slit (123). A height adjustment device (2) is installed on the coating machine and pivotally connected to the end of the air knife body (1) for driving the air knife body (1) to rise and fall; as well as An angle adjustment device (3) is mounted on the height adjustment device (2) and pivotally connected to the end of the air knife body (1) to adjust the swing angle of the air knife body (1) in order to adjust the air outlet angle of the air outlet slit (123).

2. The adjustable air knife mechanism according to claim 1, characterized in that: The housing (11) includes a first chamber housing (112), a second chamber housing (113), and two side sealing plates (114) for connecting the ends of the first chamber housing (112) and the second chamber housing (113). The first chamber housing (112), the second chamber housing (113), and the two side sealing plates (114) are tightly connected and assembled together to form a long strip-shaped housing (11). The air outlet side of the first chamber housing (112) is connected to a nozzle plate (121), and the nozzle plate (121) and the air outlet side of the second chamber housing (113) form an air outlet slit (123). At least one of the side sealing plates (114) is provided with an air inlet (111).

3. The adjustable air knife mechanism according to claim 2, characterized in that: The air outlet adjustment assembly (122) includes a plurality of slit width adjustment parts (124) for driving the air nozzle plate (121) to approach or move away from the second chamber housing (113) along the width direction of the air knife body (1) and a plurality of anti-detachment guide parts (125) for guiding the air nozzle plate (121) to move along the width direction of the air knife body (1). The plurality of slit width adjustment parts (124) and the plurality of anti-detachment guide parts (125) are arranged alternately in the length direction of the air knife body (1).

4. An adjustable air knife mechanism according to claim 3, characterized in that: The slit width adjustment part (124) includes an adjustment boss (1241) disposed on the first chamber housing (112), an adjustment groove (1242) disposed on the nozzle plate (121) for adapting to the adjustment boss (1241), and a slit adjustment bolt (1243) connecting the first chamber housing (112) and the nozzle plate (121). The adjustment boss (1241) is provided with a threaded hole, and the adjustment groove (1242) is provided with a mounting hole corresponding to the threaded hole on the adjustment boss (1241). The slit adjustment bolt (1243) is installed in the threaded hole and the mounting hole aligned in the width direction of the air knife body (1). The relative position of the nozzle plate (121) and the first chamber housing (112) in the width direction of the air knife body (1) is adjusted by adjusting the installation depth of the slit adjustment bolt (1243) to adjust the width of the air outlet slit (123).

5. An adjustable air knife mechanism according to claim 3, characterized in that: The anti-detachment guide (125) includes an anti-detachment component (1251) detachably disposed on the first chamber housing (112) and an anti-detachment groove (1252) disposed on the air nozzle plate (121) and engaged with the anti-detachment component (1251); the anti-detachment component (1251) has an anti-detachment head and a connecting tail, the anti-detachment head is movably inserted into the anti-detachment groove (1252), and the connecting tail of the anti-detachment component (1251) passes through the anti-detachment groove (1252) and is connected to the first chamber housing (112).

6. The adjustable air knife mechanism according to claim 1, characterized in that: The height adjustment device (2) includes a slide (21) and a transfer bracket (22). The slide (21) includes a base frame (211) and a lifting drive unit (212) disposed on the base frame (211). The lifting drive unit (212) is connected to the transfer bracket (22) and is used to drive the transfer bracket (22) to lift. The transfer bracket (22) is pivotally connected to the end of the air knife body (1).

7. An adjustable air knife mechanism according to claim 6, characterized in that: The lifting drive unit (212) includes a control screw (2121) and a sliding plate (2122). The control screw (2121) is rotatably mounted on the base frame (211). The sliding plate (2122) is provided with an internal threaded hole. The control screw (2121) is provided with an external thread for threaded engagement with the sliding plate (2122). The control screw (2121) passes through the internal threaded hole of the sliding plate (2122) and is threadedly connected to the sliding plate (2122).

8. The adjustable air knife mechanism according to claim 1, characterized in that: The angle adjustment device (3) includes a transition shaft (31), a cam bearing follower (32), and an angle adjustment part (33). One end of the transition shaft (31) is pivotally connected to the end of the air knife body (1), and the other end is equipped with the cam bearing follower (32). The angle adjustment part (33) is connected to the cam bearing follower (32) and the transition bracket (22) and is used to adjust the swing angle of the air knife body (1).

9. An adjustable air knife mechanism according to claim 8, characterized in that: The angle adjustment part (33) includes a rotating shaft (331), a fine-pitch ball head bolt (332), and a fine-pitch nut (333). The rotating shaft (331) is connected to the adapter bracket (22) through a second bearing (334) and a second elastic retaining ring (335). The rotating shaft (331) has a through hole for the fine-pitch ball head bolt (332) to pass through. The fine-pitch ball head bolt (332) passes through the through hole, and washers (336) and fine-pitch nuts (333) are fitted on the fine-pitch ball head bolts (332) on both sides of the through hole. The ball head end of the fine-pitch ball head bolt (332) is connected to the adapter shaft (31) through a cam bearing follower (32).

10. An adjustable air knife mechanism according to claim 8, characterized in that: The angle adjustment device (3) also includes an angle measuring device (34) for measuring the swing angle of the air knife body (1).

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