A multi-tier adjustable tobacco leaf curing device

Abstract

The utility model discloses a kind of multi-layer adjustable tobacco leaf curing device, including support frame, at least two layers of board and rotation mechanism, support frame is provided with placement area, board is stacked in placement area with preset interval along the height direction of support frame, rotation mechanism includes conversion component and lifting assembly, conversion component is removed from placement area to work area along horizontal direction by driving structure to push board, or from work area to move back to placement area, lifting assembly is set in work area, when board moves to work area, fixedly connected board, and adjust to target height by driving structure, wherein, work area is the area that board is housed to lift, rotation mechanism is used to realize the position exchange of any two boards, to solve the technical problem that flexible rotation cannot be carried out between multiple layers of board in prior art.

Description

Technical Field

[0001] This utility model relates to the field of drying technology, specifically to a multi-layer adjustable tobacco leaf drying device. Background Technology

[0002] Existing drying equipment is widely used in the drying process of agricultural products, food, clothing, and other materials. To increase the drying capacity per unit volume, a multi-layer fixed structure is usually adopted, with shelves stacked in space and supported by a support frame to achieve a relatively stable drying environment. Some improved structures also use enclosed or semi-enclosed enclosures to reduce environmental pollution and improve drying conditions.

[0003] However, operating, retrieving, and inspecting high-level shelves requires climbing or moving them layer by layer, which is cumbersome and poses safety hazards. Furthermore, when different shelves require different drying conditions or need to be prioritized due to varying moisture content of the materials inside, it's impossible to efficiently move them to a height suitable for operation. In addition, the inability to flexibly rotate shelves leads to variations in air circulation and lighting conditions between levels, causing some items to dry insufficiently or unevenly, thus limiting the overall drying quality and efficiency.

[0004] Therefore, there is an urgent need for a structure that can enable rapid movement and position interchange of any level of shelves, facilitating loading, unloading, and adjustment of the drying state. Utility Model Content

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a multi-layer adjustable tobacco drying device to solve the technical problem that the multi-layer plates cannot be flexibly rotated in the prior art.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: This utility model provides a multi-layer adjustable tobacco drying device, including: a support frame with a placement area; at least two layers of shelves stacked at a preset interval along the height direction of the support frame in the placement area; and a switching mechanism, including: a conversion component that drives the shelves to move horizontally from the placement area to the working area or from the working area back to the placement area via a drive structure; and a lifting component disposed in the working area that fixes the shelves when they move to the working area and adjusts them to a target height via a drive structure; wherein the working area is the area for accommodating the lifting and lowering of the shelves, and the switching mechanism is used to realize the position exchange of any two shelves.

[0007] In some embodiments, the conversion assembly includes: a guide fixed to a support frame and extending horizontally to a work area; and a first drive that drives the shelf to move along the extension direction of the guide to change the position of the shelf between the placement area and the work area.

[0008] In some embodiments, the conversion assembly further includes a first locking element for limiting the vertical displacement of the shelf during horizontal movement and for releasing the lock when the shelf reaches the work area.

[0009] In some embodiments, the guide member and the support frame are connected by a height adjustment mechanism, which is used to adjust the preset height position of the guide member.

[0010] In some embodiments, the guide member is connected to the support frame via a pivot, and the pivot is provided with an angle locking component for adjusting and fixing the horizontal tilt angle of the guide member.

[0011] In some embodiments, the lifting assembly includes: a guide rail fixed to a support frame and extending along the height direction of the support frame; a second drive member for driving the shelf to move along the extension direction of the guide rail; and a second locking member for fixing the relative position of the shelf and the second drive member during the lifting process and for releasing the lock when the shelf reaches the target height.

[0012] In some embodiments, the shelf has a breathable structure that extends through the shelf.

[0013] In some embodiments, the support frame is covered with a light-transmitting film to form a semi-enclosed space that is closed at the top and openable at the sides.

[0014] In some embodiments, the light-transmitting film has an openable and closable window located on the corresponding side of the work area.

[0015] In some embodiments, the multi-layer adjustable tobacco drying device further includes an exhaust fan that connects the inside and outside of the light-transmitting film.

[0016] Compared with existing technologies, the multi-layer adjustable tobacco drying device provided by this utility model, through the setting of a rotation mechanism, realizes the horizontal movement of the shelves between the placement area and the working area, as well as the height adjustment within the working area. This allows any level of the shelves to be switched to a suitable operating height for maintenance and handling, effectively reducing labor intensity and eliminating the risk of climbing. Simultaneously, this device can adapt to the needs of staged drying processes, controlling the light, humidity, and air convection conditions received by the dried materials through changes in shelf position, making the drying process more targeted and controllable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a multi-layer adjustable tobacco drying device provided in an embodiment of this utility model; Figure 2 This is a schematic diagram of the adjustment of the multi-layer adjustable tobacco drying device provided in this embodiment of the utility model; Figure 3 This is a schematic diagram of another multi-layer adjustable tobacco drying device provided in this embodiment of the utility model; Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A magnified view of a portion of region A in the middle; Figure 5 This is a schematic diagram of a layered structure provided in an embodiment of the present utility model; Figure 6 This is a schematic diagram of another multi-layer adjustable tobacco drying device provided in this utility model embodiment.

[0018] Explanation of reference numerals in the attached figures: 10. Support frame; 11. Placement area; 12. Working area; 13. Translucent film; 131. Window; 20. Shelf; 21. Ventilation structure; 30. Rotation mechanism; 31. Conversion component; 311. Guide component; 312. First drive component; 313. First locking component; 32. Lifting component; 321. Guide rail; 322. Second drive component; 323. Second locking component; 33. Height adjustment mechanism; 341. Rotating shaft; 342. Angle locking component; 40. Exhaust fan. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] In order to solve the technical problem that the multiple layers of the existing technology cannot be flexibly rotated, this utility model provides a multi-layer adjustable tobacco drying device that can realize the flexible rotation of the layers of the existing technology.

[0021] It should be noted that the multi-layer adjustable tobacco drying device described in this utility model is used for, but not limited to, drying technology. For ease of explanation, this utility model only uses the application of the multi-layer adjustable tobacco drying device in drying technology as an example. The principle of the multi-layer adjustable tobacco drying device in other types of equipment is essentially the same as that in drying technology, and will not be elaborated here.

[0022] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the structure of a multi-layer adjustable tobacco drying device provided in one embodiment of the present invention. Figure 2 This is a schematic diagram of the adjustment of the multi-layer adjustable tobacco drying device provided in this embodiment of the utility model. The device includes a support frame 10, at least two layers of shelves 20, and a rotation mechanism 30. Through structural coordination, the shelves 20 can be flexibly rotated and their positions switched between different levels, improving operational convenience and drying efficiency.

[0023] The support frame 10 is an integral load-bearing frame, and its interior is provided with a placement area 11 for accommodating multiple layers of shelves 20. The placement area 11 extends along the height direction of the support frame 10, allowing the shelves 20 to be arranged at vertical intervals to form a multi-layered drying space. The shelves 20 are the main components for supporting the drying materials and are stacked at preset intervals along the height direction of the support frame 10 within the placement area 11.

[0024] The switching mechanism 30 is located on the side or top of the support frame 10 and includes a conversion component 31 and a lifting component 32. The conversion component 31 drives the shelf 20 horizontally across the boundary of the support frame 10 into the work area 12, or moves it back from the work area 12 to the placement area 11 after adjustment. The conversion component 31 may include guiding and moving structures to ensure smooth operation of the shelf 20 during horizontal movement and to prevent tilting or deflection.

[0025] A lifting assembly 32 is disposed in the work area 12 and arranged along the height direction of the support frame 10, for adjusting the height of the shelves 20 entering the work area 12. When a shelf 20 is transferred from the placement area 11 to the work area 12, the lifting assembly 32 can raise or lower it to the target operating height, such as a position convenient for retrieval or inspection. By adjusting up and down, the positions of any two shelves 20 can be directly exchanged. The work area 12 is arranged adjacent to the placement area 11, and the spatial dimensions of the work area 12 are sufficient to accommodate the lifting and lowering movement of the shelves 20.

[0026] In this embodiment, by setting up a rotation mechanism 30, the shelves 20 can be guided from the placement area 11 within the support frame 10 to the work area 12 during use, and then adjusted to another target layer position with the help of the mechanism, realizing the layer rotation between shelves 20. Thus, the operator can move any shelf 20 to an easily operable height for loading, unloading, inspection, or maintenance without having to climb or move other shelves 20, significantly reducing labor intensity and safety hazards. Simultaneously, the shelf 20 can be dynamically optimized according to drying requirements. For example, some materials have staged drying process requirements, such as needing strong light in the initial stage and weak light or light avoidance in the later stage. This device can meet the differentiated needs for light, ventilation, and humidity at different stages by adjusting the layer position, making the drying process more flexible and controllable.

[0027] In one embodiment, the conversion assembly 31 includes a guide 311 and a first drive 312. The guide 311 is fixedly mounted on the support frame 10, extending from the placement area 11 toward the working area 12, and is arranged horizontally or substantially horizontally to provide trajectory guidance for the lateral movement of the shelf 20. The guide 311 is preferably a rigid guide rail 321 or a roller slide structure, which is fixed to the support frame 10 by bolts, welding, or snap-fit ​​to ensure structural stability under load. Simultaneously, the guide 311 has sliding components, such as pulleys, sliders, or roller assemblies, that cooperate with the shelf 20 above or on its side, allowing the shelf 20 to move smoothly along the guide 311, reducing friction and sway.

[0028] The first driving component 312 is connected to the shelf 20 and positioned near the guide component 311. It drives the shelf 20 to move horizontally along the extension direction of the guide component 311, thereby enabling the shelf 20 to switch between the placement area 11 and the work area 12. The first driving component 312 can adopt various driving methods, such as manual push-pull, rack and pinion transmission, screw motor drive, or chain transmission, to meet the operational convenience requirements of different application scenarios.

[0029] In this embodiment, the guide 311 and the first drive 312 are coordinated to enable the shelf 20 to move smoothly along a predetermined path in the horizontal direction, realizing the conversion between the placement area 11 and the work area 12, creating conditions for lifting and adjusting, thereby realizing the position conversion of the shelf 20 between different levels.

[0030] Furthermore, in some embodiments, the conversion assembly 31 further includes a first locking member 313, which is disposed on the side or below the guide member 311 and cooperates with the shelf 20 to form a limit, so that the shelf 20 maintains its stable bearing posture during movement and prevents the shelf 20 from sinking, tilting or shifting due to gravity or external force, thereby ensuring that the shelf 20 slides reliably along the guide member 311. The first locking member 313 can adopt various structural forms, such as elastic buckles, limiting slots, lateral clamping blocks or anti-detachment guide wheel devices, to ensure the limiting effect while allowing the shelf 20 to move smoothly on the horizontal path.

[0031] When the shelf 20 moves from the placement area 11 to the corresponding position in the work area 12, the first locking member 313 can be unlocked by mechanical triggering, sensor recognition, or manual lifting, allowing the shelf 20 to leave the guide state and be handed over to the lifting assembly 32 for vertical adjustment, thereby completing the task switch of the shelf 20 from the horizontal movement stage to the lifting adjustment stage. Through the above settings, the first locking member 313 can automatically or semi-automatically switch its locking state under different working conditions, thereby ensuring the safety and stability of the shelf 20 during movement and enabling the shelf 20 to be smoothly adjusted in height in the work area 12, ensuring continuous and reliable position switching of the shelf 20.

[0032] In some embodiments, please refer to Figure 3 and Figure 4 , Figure 3 This is a schematic diagram of another multi-layer adjustable tobacco drying device provided in this embodiment of the utility model. Figure 4 This is provided by the embodiment of the present utility model. Figure 3 A partially enlarged schematic diagram of area A. The guide component 311 is connected to the support frame 10 via a height adjustment mechanism 33. The height adjustment mechanism 33 is used to preset and adjust the height of the guide component 311, thereby changing the starting layer position for horizontal transitions of the shelf 20 under different rotation requirements. The height adjustment mechanism 33 may include a sliding groove adjustment structure, a perforated positioning structure, a screw lifting structure, or a gas spring support structure, etc., allowing the guide component 311 to move vertically relative to the support frame 10, and locking its height after adjustment via a positioning component. The operator can select and adjust the guide component 311 to the corresponding height according to the rotation path of different shelf levels 20, the target exchange level, or the requirements of the drying process.

[0033] In this embodiment, the height adjustment mechanism 33 allows the device to be flexibly configured according to different usage scenarios. For example, in some drying processes, different layers have controllable differences in light, humidity, and ventilation conditions. By adjusting the height of the guide 311, the environmental zones corresponding to each layer can be redefined, allowing the rotated shelf 20 to more accurately enter the environmental position that matches its current drying stage. The height adjustment mechanism 33 works in conjunction with the rotation mechanism 30, enabling the shelf 20's position change to be not limited to the interchange between fixed layers, but also to achieve more flexible and efficient layer adjustment based on a preset height strategy, improving the system's environmental adaptability and process matching capability in various application scenarios.

[0034] In one embodiment, the guide member 311 is connected to the support frame 10 via a pivot 341. The pivot 341 is located at the connection point between the guide member 311 and the support frame 10, allowing the guide member 311 to be angled relative to the support frame 10 around the pivot 341. The pivot 341 can be a hinge shaft or a rotary joint structure, providing the guide member 311 with the ability to swing within a certain angle range, allowing the guide member 311 to be adjusted from a completely horizontal state to a guiding state with a slight tilt. To ensure that the adjusted guide member 311 remains stable during movement, an angle locking component 342 is provided at the pivot 341 to fix and limit the horizontal tilt angle of the guide member 311. The angle locking component 342 can be a ratchet positioning block, a friction clamping structure, a positioning hole pin mechanism, or a toothed disc clamping structure, etc., so that the operator can reliably lock it after obtaining the desired tilt angle, preventing the guide member 311 from swaying under load or motion impact.

[0035] In this embodiment, the guide 311 can be angle-optimized according to different operational requirements through the rotating shaft 341 structure. For example, when enhanced sunlight is required in a certain drying stage, the guide 311 can be adjusted to tilt towards the light-exposed side, allowing the shelf 20 rotating to that guide side to obtain a larger light incident angle; while when some drying materials require weak light or to avoid direct sunlight, the guide 311 can be adjusted to the backlight direction to achieve the effect of shading and light mitigation. With the help of this angle adjustment method, the shelf 20 can accurately match different lighting conditions, thereby better adapting to the lighting requirements of different materials at different stages of the drying process.

[0036] In one embodiment, the lifting assembly 32 includes a guide rail 321, a second drive member 322, and a second locking member 323. The guide rail 321 is fixedly mounted on the support frame 10 and extends along the height direction of the support frame 10, providing a constraint path for the vertical movement of the shelf 20. The guide rail 321 can be a grooved rail, a column-type slide rail, or a double-sided symmetrical guide wheel rail structure to adapt to the lifting requirements of the shelf 20 under different sizes and load conditions. The guide rail 321 or its side is provided with sliding components that cooperate with the shelf 20, such as slide blocks, rollers, or sliders, to ensure the shelf 20 maintains a stable posture and low resistance during vertical movement, avoiding lifting deviation or jamming.

[0037] The second drive unit 322 is connected to the shelf 20 and disposed near the guide rail 321, and is used to drive the shelf 20 to move up and down along the guide rail 321. The second drive unit 322 can be in the form of a lead screw motor, rack and pinion, electric push rod, chain lifting mechanism or winch-type cable structure, etc., and can be configured according to the weight of the shelf 20 and the operating frequency. In a preferred embodiment, the second drive unit 322 can also input a preset height command to achieve precise lifting control to meet different operating height requirements and process height requirements.

[0038] The lifting assembly 32 is equipped with a second locking element 323. The second locking element 323 cooperates with the shelf 20 or the second drive element 322 to provide a fixed-point limit during the lifting process, preventing the shelf 20 from slipping, falling, or shifting due to inertia or gravity. The second locking element 323 can be in the form of a mechanical pawl, an automatic self-locking tooth structure, or an electromagnetic clamping assembly. After the shelf 20 reaches the predetermined target height, the locking can be released manually, automatically, or by sensor activation, allowing the shelf 20 to be smoothly pushed back to the placement area 11 or loaded, unloaded, operated, or rotated at the target height.

[0039] In this embodiment, the combination of guide rail 321, second drive component 322 and second locking component 323 enables the lifting component 32 to provide a safe, stable and precise vertical movement path for the shelf 20, and seamlessly connect with the horizontal conversion process, realizing the function of transferring the shelf 20 from any original level to a suitable operating height, providing a reliable structural foundation and operation assistance for the rotation of shelf 20 position.

[0040] In some embodiments, please refer to Figure 5 , Figure 5 This is a schematic diagram of a shelf 20 provided in an embodiment of the present invention. The shelf 20 is provided with a breathable structure 21 that penetrates through the shelf 20 to improve air circulation during the drying process. Specifically, the breathable structure 21 can be in the form of evenly distributed air holes, a mesh plate structure, or strip slits, so that the shelf 20 can form a continuous upper and lower air exchange channel while supporting the dried material. Since the dried material usually releases high humidity moisture during the drying process, if the moisture remains below the shelf 20 or in a local area, it will affect the drying speed and create a risk of mold growth. Therefore, the through-hole arrangement of the breathable structure 21 allows the moisture to escape upwards and the heat and moisture to be discharged in time, avoiding uneven drying caused by moisture accumulation.

[0041] Preferably, the opening size and distribution of the breathable structure 21 can be set according to the particle size of the material being dried, support requirements, and airflow characteristics, so that it has sufficient mechanical strength to bear the weight of the material being dried, while also ensuring the stability and uniformity of airflow. In some embodiments, the breathable structure 21 can also form a convection path with external exhaust or natural airflow, allowing air to flow through from the bottom of the shelf 20 upwards, effectively improving the drying efficiency within the multi-layer structure. Furthermore, through the rotation operation between the shelves 20, shelves 20 that were originally in poorly ventilated positions can gradually move to better ventilated areas according to the changes in the drying stage, while the breathable structure 21 further enhances the airflow performance between different levels, assisting in the overall balanced control of the drying environment.

[0042] In one embodiment, please refer to Figure 6 , Figure 6 This is a schematic diagram of another multi-layer adjustable tobacco drying device provided in this embodiment of the utility model. A light-transmitting film 13 covers the outside of the support frame 10, forming a semi-enclosed drying space inside the support frame 10 that is closed at the top and openable at the sides. The light-transmitting film 13 is preferably made of a film material with weather resistance, UV protection, and moderate light transmittance, such as polyethylene film or transparent polyester film. Its covering not only blocks external dust, rain, and insect intrusion, but also maintains the stability of the internal humid and hot environment to a certain extent, which is beneficial for the even drying of the materials. The top of the film forms a fixed and closed structure, minimizing the impact of external environmental changes on the materials being dried inside.

[0043] The sides of the translucent film 13 are designed to be openable and closable, for example, using a zipper, roller shutter, or magnetic closure. This allows the operator to adjust the size of the side openings according to changes in actual drying conditions, thereby controlling the intensity of internal air exchange. When the external environment has good ventilation or rapid dehumidification is required, the sides can be opened to enhance air convection; when the ambient humidity is high or the influence of external temperature needs to be reduced, the side openings can be closed, creating a more stable semi-enclosed state for the internal space. Furthermore, the translucent film 13 allows natural light to penetrate, providing appropriate illumination to the dried materials, which is beneficial for promoting the maturation, sterilization, or dehydration processes of certain materials.

[0044] Furthermore, the light-transmitting film 13 is provided with an openable and closable window 131, and the window 131 is located on the corresponding side of the work area 12. When the shelf 20 is moved to the work area 12 for rotation operation via the conversion component 31, the operator can directly pick up, place, inspect, or adjust the shelf 20 from the outside of the device by opening the window 131, thereby using the area outside the window 131 as a work space, realizing interactive operation between indoor and outdoor or between the inside and outside of the device, effectively saving the effective operating space inside the device. The openable and closable window 131 can adopt a flip-type, sliding type, or roller shutter type structure, and use magnetic fastening, sliding rail positioning, or zipper closure to achieve convenient opening and closing control, so that it remains sealed in the non-operation state to reduce the entry of external dust and insects, while maintaining the stability of the semi-enclosed environment.

[0045] Placing window 131 on the side of the work area 12 also provides operators with a direct contact path during the changing of shelves 20, allowing the shelves 20 to be placed and removed without being fully inserted into the device. This avoids the operational limitations caused by shelves 20 being inserted deep into the device in traditional drying equipment. Operators can complete most of the operations from outside the device, which helps improve operational flexibility and efficiency.

[0046] In one embodiment, the multi-layer adjustable tobacco drying device further includes an exhaust fan 40, which is disposed on the side or top of the light-transmitting film 13 and connects the inner and outer spaces of the film to achieve active exhaust of internal air and effective guidance of airflow direction. The exhaust fan 40 can be tightly integrated with the light-transmitting film 13 by embedded installation or bracket fixing, and its ventilation port position can be arranged according to the humidity and heat distribution characteristics of the drying environment to form a favorable exhaust channel in the area where moisture accumulates.

[0047] When the exhaust fan 40 is running, it can promptly exhaust the hot and humid air generated during the drying process of the shelves 20 to the outside of the device, preventing moisture from accumulating in the semi-enclosed space and promoting the entry of drier air from the outside, thus creating continuous air circulation inside, accelerating moisture evaporation, and improving overall drying efficiency. In some applications, the exhaust fan 40 can be used in conjunction with the openable and closable window 131. By controlling the opening size of the window 131, the amount of air supplied can be adjusted, making the air convection more balanced and stable. At the same time, the exhaust fan 40 can also be used in conjunction with the shelf 20 rotation structure. When a shelf 20 is located in a less ventilated area, it can be rotated to an area with better ventilation, and then the exhaust fan 40 can be used to further improve the drying effect of that shelf.

[0048] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A multi-layer adjustable tobacco leaf drying device, characterized in that, include: The support frame has a designated placement area. At least two layers of shelves are stacked at a predetermined interval along the height direction of the support frame in the placement area; and Rotation mechanism, including: The conversion component, through a drive structure, pushes the shelf horizontally out of the placement area to the work area, or from the work area back to the placement area; and A lifting assembly is installed in the work area. When the shelf moves to the work area, it is fixedly connected to the shelf and adjusted to the target height by a drive structure. The working area is a region that accommodates the lifting and lowering of the shelves, and the switching mechanism is used to realize the position exchange of any two shelves.

2. The multi-layer adjustable tobacco leaf drying device according to claim 1, characterized in that, The conversion component includes: A guide member, fixed to the support frame, extends horizontally into the work area; A first driving member drives the shelf to move along the extension direction of the guide member, so as to change the position of the shelf between the placement area and the work area.

3. The multi-layer adjustable tobacco leaf drying device according to claim 2, characterized in that, The conversion assembly further includes a first locking element, which is used to restrict the vertical displacement of the shelf during horizontal movement and to release the lock when the shelf reaches the work area.

4. The multi-layer adjustable tobacco drying device according to claim 2 or 3, characterized in that, The guide member is connected to the support frame via a height adjustment mechanism, which is used to adjust the preset height position of the guide member.

5. The multi-layer adjustable tobacco drying device according to claim 2 or 3, characterized in that, The guide member is connected to the support frame via a rotating shaft, which is equipped with an angle locking component for adjusting and fixing the horizontal tilt angle of the guide member.

6. The multi-layer adjustable tobacco leaf drying device according to claim 1, characterized in that, The lifting assembly includes: The guide rail is fixed to the support frame and extends along the height direction of the support frame; The second driving component drives the shelf to move along the extension direction of the guide rail; The second locking element is used to fix the relative position of the shelf and the second driving element during the lifting process, and to release the lock when the shelf reaches the target height.

7. The multi-layer adjustable tobacco leaf drying device according to claim 1, characterized in that, The shelf has a breathable structure that extends through the shelf.

8. The multi-layer adjustable tobacco leaf drying device according to claim 1, characterized in that, The support frame is covered with a light-transmitting film, forming a semi-enclosed space that is closed at the top and can be opened and closed on the sides.

9. The multi-layer adjustable tobacco leaf drying device according to claim 8, characterized in that, The light-transmitting film is provided with an openable and closable window, which is located on the side corresponding to the work area.

10. The multi-layer adjustable tobacco drying device according to claim 8 or 9, characterized in that, The multi-layer adjustable tobacco drying device also includes an exhaust fan, which connects the inside and outside of the light-transmitting film.

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