White tea intelligent withering device

Abstract

The application discloses a white tea intelligent withering device and belongs to the technical field of tea processing equipment. The device comprises a hollow main body, a plurality of uniform distribution withering layers are arranged in the main body, the plurality of withering layers divide the inside of the main body into a plurality of withering cavities, two adjacent uniform distribution withering layers are respectively provided with left and right symmetrical discharge ports, the discharge ports make the plurality of withering cavities communicate with each other and form a continuous S shape, the uniform distribution withering layers can uniformly distribute tea leaves thereon and drive the tea leaves to fall into the next layer from the discharge ports, one side of the withering cavity is provided with an air inlet provided with a heating air inlet assembly, the other side is provided with an air outlet, a temperature sensor is arranged in the withering cavity, a control panel is arranged on the outer side wall of the main body, and the heating air inlet assembly and the temperature sensor are electrically connected to the control panel. The withering ports arranged on the upper and lower adjacent two layers are left and right symmetrical, the tea leaves are automatically turned over when transferring between the layers, automatic turning and stirring are realized, the tea leaves are continuously transferred between the layers, and continuous withering production is realized.

Description

Technical Field

[0001] This invention relates to the field of tea processing equipment technology, and in particular to an intelligent withering device for white tea. Background Technology

[0002] Withering is a crucial process in the formation of white tea's quality, directly affecting its aroma, taste, and appearance. Currently, the main withering methods for white tea include natural withering, compound withering, and heated withering. Natural withering and compound withering rely heavily on the outdoor environment and are greatly affected by weather; therefore, they have been gradually replaced by heated withering. The commonly used equipment for heated withering is a withering trough, where the tea leaves are evenly spread and withered by hot air blown in from the bottom. However, existing heated withering devices still have two prominent technical problems in practical use: Firstly, existing withering equipment lacks an effective automatic turning mechanism, and the turning operation relies on manual labor. During the withering process of white tea, in order to ensure that the tea leaves lose moisture evenly and avoid local overheating or yellowing, the tea leaves need to be turned regularly. In traditional withering troughs, operators need to turn the tea leaves by hand or with a wooden rake at regular intervals during the withering process. This is not only extremely labor-intensive, but the uniformity and frequency of turning also depend entirely on manual experience, making it difficult to guarantee the consistency of withering for each batch of tea. Although some improvement solutions have attempted to add stirring blades or vibrating plates to the withering trough, these mechanical turning methods are prone to damaging the tender tea buds, and the uneven accumulation of tea leaves during turning can actually cause differences in the degree of withering. Therefore, how to achieve automatic and uniform turning without damaging the tea leaves has been a long-standing technical problem that has not been effectively solved in this field.

[0003] Secondly, existing withering equipment operates in batches, making continuous withering production impossible. The widely used withering troughs are typical batch-type equipment. Before each withering, tea leaves need to be manually spread evenly into the trough. After withering, the machine must be stopped to discharge the tea leaves, and then the next batch of tea leaves must be fed in and spread again. This intermittent operation leads to discontinuous production, wasted auxiliary time between batches, low production efficiency, and difficulty in meeting the needs of large-scale production. Although some companies have attempted to design multi-layer tray or chain-plate withering machines in recent years, the transfer of tea leaves between layers still requires manual intervention, or the tea leaves cannot be turned over during the transfer process, still failing to achieve fully automated continuous withering from feeding to discharging. Therefore, how to achieve continuous withering of white tea is also a key bottleneck restricting the improvement of automation levels in white tea processing.

[0004] In summary, existing white tea withering equipment has significant shortcomings in both automatic turning and continuous production, and there is an urgent need for a new type of withering equipment that can solve both problems at the same time. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent withering device for white tea, which aims to solve the technical problems of existing withering devices that cannot automatically stir and cannot continuously wither, and to realize automatic stirring and continuous production in the withering process of white tea.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: An intelligent withering device for white tea includes a hollow main body with multiple evenly distributed withering layers arranged from top to bottom. These layers divide the interior of the main body into multiple withering chambers. Each adjacent evenly distributed withering layer has a symmetrical feeding port. These feeding ports connect the multiple withering chambers, forming a continuous S-shape. The evenly distributed withering layers can be used to evenly distribute tea leaves or to allow tea leaves to fall from the feeding ports into the next withering layer. Each withering chamber has an air inlet on one side and an air outlet on the other. The air inlet is equipped with a heating air intake component. A temperature sensor is installed inside each withering chamber. A control panel is located on the outer wall of the main body, and the heating air intake component and the temperature sensor are electrically connected to the control panel.

[0007] By adopting the above technical solution, the tea leaves enter from the top of the main body and pass through multiple evenly distributed withering layers in sequence. After withering on each layer, they fall into the next layer through the feeding port, forming an S-shaped continuous travel path. The feeding ports of two adjacent evenly distributed withering layers are symmetrically arranged, allowing the tea leaves to naturally tumble as they fall from one layer to the next, achieving automatic turning without manual intervention. The turning process is gentle and does not damage the tea leaves. At the same time, the tea leaves are continuously transferred between layers, with feeding and discharging occurring simultaneously, realizing a fully continuous withering production process from feeding to discharging.

[0008] A further configuration of the present invention is that the uniformly distributed withering layer is a conveyor belt, and the conveyor belt is electrically connected to the control panel.

[0009] By adopting the above technical solution, a conveyor belt is used as the uniform withering layer, allowing tea leaves to be evenly spread out on the conveyor belt for withering. The operating speed of the conveyor belt is controlled by a control panel, and the residence time of the tea leaves in each layer can be controlled by adjusting the speed of the conveyor belt, thereby precisely controlling the withering time. Once the tea leaves have completed withering in a certain layer, the conveyor belt continues to run, feeding the tea leaves from the feed inlet into the next layer, achieving automated continuous conveying.

[0010] A further feature of the present invention is that a support plate is provided at the discharge port, one end of the support plate is elastically connected to the inner wall of the main body, the other end of the support plate is close to the conveyor belt and has a plurality of vibrating rods evenly provided from front to back, and a vibrating motor is provided at the lower end of the support plate, the vibrating motor being electrically connected to the control panel.

[0011] By adopting the above technical solution, when the tea leaves fall from the feed inlet, the vibration motor drives the support plate to vibrate, which in turn drives the vibration rod to vibrate. This helps to disperse and evenly distribute the falling tea leaves, preventing them from piling up or clumping at the feed inlet and ensuring that the tea leaves can fall evenly onto the next layer of the conveyor belt, further improving the uniformity of mixing and distribution.

[0012] A further feature of the present invention is that the air inlet is located on the side close to the discharge port, and the heating air inlet assembly can close the discharge port during heating.

[0013] By adopting the above technical solution, the heating air intake component can simultaneously close the feed port when sending hot air into the withering chamber, preventing hot air from leaking from the feed port into adjacent withering chambers, ensuring the independent temperature control of each withering chamber, and improving the efficiency of heat energy utilization.

[0014] A further configuration of the present invention is as follows: the front and rear inner walls of the withering chamber near the discharge port are fitted with mounting grooves communicating with the air inlet; the upper and lower ends of the mounting grooves extend to the upper and lower conveyor belts; the heating air intake assembly includes a vertical plate, an air intake cylinder, a telescopic motor, an air intake pipe, a solenoid valve, and a heating element; the vertical plate is vertically arranged on the left and right sides of the main body; the vertical plate is connected to the main body via a telescopic motor; multiple air intake cylinders are provided and are inserted one-to-one into the air intake groove and the mounting groove; the air intake cylinder is slidably connected to the air intake groove and the mounting groove; one end of the air intake cylinder outside the main body is connected to the vertical plate; one end of the air intake cylinder inside the main body can extend to the end near the conveyor belt to cover the discharge port; the air intake pipe is located on the outside of the main body; the air intake pipe is connected to the end of each air intake cylinder near the vertical plate via a telescopic solenoid valve; the heating element is located inside the air intake cylinder; and the heating element, the telescopic motor, and the solenoid valve are all electrically connected to the control panel.

[0015] By adopting the above technical solution, when heating and withering are required, the vertical plate pushes the air inlet cylinder to slide along the mounting groove into the main body, extending the inner end of the air inlet cylinder to a position close to the conveyor belt and covering the discharge port. Simultaneously, the heating element activates to heat the air entering the air inlet cylinder. The hot air enters the withering chamber from the air inlet cylinder to heat and wither the tea leaves. When heating is not required or when discharging is needed, the air inlet cylinder can be retracted to open the discharge port. The air inlet cylinder has the dual functions of supplying air and sealing the discharge port, and its structure is compact and easy to control.

[0016] A further feature of the present invention is that the internal cross-section of the air intake cylinder is smaller at one end near the vertical plate and larger at the other end away from the vertical plate.

[0017] By adopting the above technical solution, the air inlet adopts a gradually expanding structure. After the air enters from the small diameter end, it expands and slows down at the large diameter end, so that the hot air can be diffused more evenly and gently into the withering chamber, avoiding excessive wind speed from impacting or blowing away the tea leaves, and ensuring that the tea leaves are evenly spread on the conveyor belt.

[0018] A further feature of the present invention is that a humidity sensor is provided inside the withering chamber.

[0019] By adopting the above technical solution, the humidity sensor monitors the humidity in the withering chamber in real time and transmits the signal to the control panel. The control panel can adjust the working parameters of the heating air intake component according to the humidity data, so as to achieve precise control of the humidity of the withering environment and further ensure the withering quality.

[0020] A further configuration of the present invention is as follows: the upper end of the main body is provided with a feeding hopper, the feeding hopper being located at the end of the uppermost withering cavity away from its corresponding discharge port; the lower end of the main body is provided with a discharge hopper, the discharge hopper being located below the discharge port corresponding to the lowermost withering cavity; and the lower end of the main body is provided with a support column.

[0021] By adopting the above technical solution, the feed hopper is located at the end of the uppermost withering chamber furthest from the discharge port. This ensures that the tea leaves, after entering through the feed hopper, must be conveyed by the entire conveyor belt to reach the discharge port, guaranteeing sufficient withering time at each layer. The discharge hopper is located below the lowest discharge port for easy collection of withered tea leaves.

[0022] In summary, the present invention has the following beneficial effects: Firstly, this invention enables automatic turning and mixing: by setting the feeding ports symmetrically on the left and right sides of two adjacent withering layers, the tea leaves are automatically turned over when transferred between layers, eliminating the need for manual turning and mixing. The tea leaves are mixed evenly without being damaged, effectively solving the problem of existing technologies that rely on manual turning and mixing.

[0023] Secondly, this invention enables continuous withering production: after the tea leaves enter from the feed hopper, they pass through each layer of conveyor belts to complete withering, and are finally discharged from the discharge hopper. Feeding and discharging can be carried out simultaneously, and the whole process is continuous and uninterrupted, which greatly improves production efficiency and overcomes the defects of batch operation.

[0024] Thirdly, the present invention can precisely control the withering environment of each layer through the cooperation of temperature sensors, humidity sensors and control panel, thereby further improving the stability of withering quality. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the heating air intake assembly in this invention; Figure 3 This is a schematic diagram of the structure of the support plate in this invention.

[0026] In the diagram: 1. Main body; 2. Uniformly distributed withering layer; 3. Withering chamber; 4. Feeding port; 5. Air inlet; 6. Air outlet; 7. Heating and air intake assembly; 71. Vertical plate; 72. Air inlet cylinder; 73. Air inlet pipe; 74. Solenoid valve; 75. Heating element; 76. Telescopic motor; 8. Temperature sensor; 10. Support plate; 11. Vibration rod; 12. Vibration motor; 13. Mounting slot; 14. Feed hopper; 15. Discharge hopper; 16. Support column; 17. Humidity sensor. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to the accompanying drawings.

[0028] In the description of this invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0029] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0030] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" 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, a direct connection, or an indirect connection through an intermediate medium; or they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] Example: An intelligent withering device for white tea, such as... Figure 1 and Figure 2As shown, the system includes a hollow main body 1, which has a vertical cabinet structure with internal storage space. Multiple evenly distributed withering layers 2 are arranged from top to bottom within the main body 1. Each withering layer 2 is a conveyor belt, horizontally positioned and driven by a motor. The conveyor belts are electrically connected to a control panel, which adjusts the conveyor belt speed via a frequency converter. These multiple conveyor belts divide the interior of the main body 1 into multiple independent withering chambers 3, which are arranged vertically in a multi-layered structure. Each adjacent conveyor belt has a symmetrical discharge port 4. Specifically, the first conveyor belt has a discharge port 4 at its right end, the second conveyor belt has a discharge port 4 at its left end, the third conveyor belt has another discharge port 4 at its right end, and so on, connecting the multiple withering chambers 3 through the discharge ports 4 and forming a continuous S-shaped zigzag path. During operation, the conveyor belts evenly spread the tea leaves on their surface. When the conveyor belts reach their end, the tea leaves fall from the discharge ports 4 into the next conveyor belt.

[0032] The upper part of the main body 1 is equipped with a feeding hopper 14, which is funnel-shaped with a larger top and a smaller bottom to facilitate the smooth flow of tea leaves. The feeding hopper 14 is located at the end of the uppermost withering chamber 3 away from its corresponding discharge port 4. That is, if the discharge port 4 of the uppermost conveyor belt is located at the right end, then the feeding hopper 14 is located above the left end of the uppermost withering chamber 3. In this way, after the tea leaves enter from the feeding hopper 14, they need to be conveyed by the entire layer of conveyor belt to reach the discharge port 4, ensuring that the tea leaves have sufficient withering stroke in each layer. The lower part of the main body 1 is equipped with a discharge hopper 15, which is located below the discharge port 4 corresponding to the lowermost withering chamber 3. It is used to receive the withered tea leaves and discharge them in a concentrated manner. Support columns 16 are provided at the four corners of the lower part of the main body 1 to support the main body 1 at a suitable height for easy discharge operation.

[0033] like Figure 3 As shown, a support plate 10 is provided at the discharge port 4, and the support plate 10 is horizontally positioned below the discharge port 4. One end of the support plate 10 is connected to the inner wall of the main body 1 by an elastic element such as a spring or rubber block, allowing the support plate 10 to move vertically. At the other end of the support plate 10, near the edge of the conveyor belt, multiple vibrating rods 11 are evenly arranged from front to back (i.e., in the width direction perpendicular to the conveyor belt's travel direction). The vibrating rods 11 are spaced apart along the width direction of the conveyor belt, with a spacing of 10-30mm between adjacent vibrating rods to ensure effective dispersion of the falling tea leaves. A vibration motor 12 is provided at the lower end of the support plate 10. The output shaft of the vibration motor 12 is connected to the support plate 10 via an eccentric block, and the vibration motor 12 is electrically connected to the control panel. When the vibration motor 12 is started, it drives the support plate 10 to generate high-frequency micro-vibration, which in turn causes the vibrating rods 11 to vibrate synchronously, assisting in the dispersion and even distribution of the falling tea leaves, preventing the tea leaves from accumulating at the discharge port 4.

[0034] An air inlet 5 is provided on one side of the withering chamber 3, and an air outlet 6 is provided on the other side. The air inlet 5 is used to introduce heated air into the withering chamber 3, and the air outlet 6 is used to expel the moisture in the withering chamber 3, forming a hot air circulation. The air inlet 5 is located on the side close to the feeding port 4, that is, the air inlet 5 and the feeding port 4 are located at the same end of the withering chamber 3. In this way, after the hot air is sent in from near the feeding port 4, it passes horizontally through the entire withering chamber 3 and is discharged from the air outlet 6 at the other end. The hot air path is opposite to or crosses the direction of tea leaf transportation, which improves the contact efficiency between the hot air and the tea leaves.

[0035] The withering chamber 3 has two inner walls near the discharge port 4, with mounting grooves 13 connected to the air inlet 5. The mounting grooves 13 are horizontally oriented, extending to the edges of the upper and lower conveyor belts. The cross-section of the mounting grooves 13 is rectangular or circular. A heating air inlet assembly 7 is located at the air inlet 5. The heating air inlet assembly 7 includes a vertical plate 71, air inlet cylinders 72, air inlet pipes 73, a solenoid valve 74, a heating element 75, and a telescopic motor 76. The vertical plate 71 is vertically mounted on the left and right outer walls of the main body 1. The vertical plate 71 can slide horizontally and is connected to the main body 1 via the telescopic motor 76, which drives its sliding motion. Other driving methods are also possible. Multiple air inlet cylinders 72 are provided and inserted one-to-one into the air inlet 5 and the mounting grooves 13. The air inlet cylinders 72 are in sliding fit with the air inlet 5 and the mounting grooves 13. A sealing ring is provided between the outer wall of the air inlet cylinder 72 and the inner wall of the mounting groove 13 to ensure airtightness. One end of the air inlet cylinder 72 is fixedly connected to the vertical plate 71 outside the main body 1. When the vertical plate 71 slides, it can drive all the air inlets 72 to move horizontally synchronously. The end of the air inlet cylinder 72 inside the main body 1 can extend to the edge near the conveyor belt and cover the discharge port 4 from the side, so that the discharge port 4 is closed by the inner end of the air inlet cylinder 72. The internal cross-section of the air inlet cylinder 72 is a gradually expanding shape with a smaller end near the vertical plate 71 and a larger end away from the vertical plate 71. That is, the diameter of the inner end (air outlet) of the air inlet cylinder 72 is larger than the diameter of the outer end (air inlet). After the air enters from the small diameter end, it expands and slows down at the large diameter end, so that the hot air can diffuse more evenly and gently into the withering chamber 3. The air inlet pipe 73 is located on the outside of the main body 1 and connected to an external air source. The air inlet pipe 73 is connected to the end of each air inlet cylinder 72 near the vertical plate 71 through a solenoid valve 74. The solenoid valve 74 is used to control the air supply and the air supply volume of each layer of air inlet cylinder 72. The heating element 75 is located inside the air inlet cylinder 72 near the outer end. The heating element 75 is an electric heating tube or a PTC heater. The solenoid valve 74, the heating element 75 and the telescopic motor 76 are all electrically connected to the control panel.

[0036] A temperature sensor 8 and a humidity sensor 17 are installed inside the withering chamber 3. Both sensors are fixedly installed in the middle of the inner wall of the withering chamber 3, with their probes extending into the chamber. The temperature sensor 8 monitors the temperature inside the withering chamber 3 in real time, and the humidity sensor 17 monitors the humidity. The temperature sensor 8, humidity sensor 17, conveyor belt drive motor, vibration motor 12, solenoid valve 74, and heating element 75 are all electrically connected to the control panel. The control panel is located on the outer wall of the main body 1 and is a PLC touchscreen all-in-one machine. Operators can set process parameters such as temperature, humidity, and conveyor belt speed for each layer of the withering chamber 3 through the control panel. The control panel automatically adjusts the power of the heating element 75 and the opening degree of the solenoid valve 74 based on the signals fed back from the temperature sensor 8 and humidity sensor 17, achieving independent closed-loop control of the withering environment for each layer.

[0037] The working principle of this invention is as follows: First, the operator sets the withering temperature, humidity, and conveyor belt speed of each withering chamber 3 via the control panel. Then, the fresh white tea leaves to be withered are fed into the feed hopper 14 and fall onto the uppermost conveyor belt. The conveyor belt runs at a uniform speed, transporting the tea leaves forward, where they naturally spread into a uniform thin layer. Simultaneously with the operation of each conveyor belt, the vertical plate 71 pushes the air inlet cylinders 72 of each layer to slide along the mounting groove 13 into the main body 1, so that the inner end of each air inlet cylinder 72 extends to the edge of the corresponding conveyor belt's discharge port 4 and covers it. External air enters each air inlet cylinder 72 through the air inlet pipe 73, is heated by the heating element 75 to form hot air, and diffuses from the inner end (larger diameter end) of the air inlet cylinder 72 into each withering chamber 3, heating and withering the tea leaves on the conveyor belt. After passing through the withering chamber 3, the hot air is discharged from the outlet 6 on the other side, carrying away the moisture evaporated from the tea leaves. Temperature sensor 8 and humidity sensor 17 monitor the temperature and humidity in each withering chamber 3 in real time and feed the data back to the control panel. The control panel compares the measured values ​​with the set values ​​and automatically adjusts the power of each heating element 75 and the opening of the solenoid valve 74 to keep the temperature and humidity in each withering chamber 3 within the preset range.

[0038] After the tea leaves have completed their predetermined withering time on a certain layer, the control panel controls the vertical plate 71 to slide outward, and the air inlet 72 to retract, thus opening the discharge port 4. At this time, the conveyor belt continues to run, transporting the tea leaves to the discharge port 4. Under the action of gravity, the tea leaves fall from the discharge port 4 into the next layer of the conveyor belt. Because the discharge ports 4 of the two adjacent layers of conveyor belts are symmetrically arranged, for example, the first layer of tea leaves falls from the right end of the discharge port 4, while the second layer of conveyor belt runs from the left end, the upper and lower surfaces of the tea leaves rotate 180° when they fall into the second layer of conveyor belt, achieving automatic turning and mixing. At the same time, the control panel starts the vibration motor 12, and the vibration rod 11 performs high-frequency vibration to disperse the tea leaves during the falling process, so that the tea leaves are evenly distributed on the next layer of conveyor belt, avoiding accumulation. The tea leaves are transferred sequentially between the layers of conveyor belts, and after passing through each layer, they complete an automatic turning and re-spreading, while receiving independent hot air withering in each withering chamber 3. After passing through multiple conveyor belts, the tea leaves undergo withering at the bottom layer and fall into the discharge hopper 15 from the bottom feed port 4. The tea is then collected and discharged through the discharge hopper 15, completing the entire withering process. Throughout the process, the feed hopper 14 continuously feeds the tea, while the discharge hopper 15 discharges the tea simultaneously, achieving continuous production.

[0039] This specific embodiment is merely an explanation of the present invention and is not intended to limit the invention. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. An intelligent withering device for white tea, characterized in that: The body (1) is hollow inside. Multiple withering layers (2) are arranged from top to bottom inside the body (1). The multiple withering layers divide the interior of the body (1) into multiple withering cavities (3). Two adjacent withering layers (2) are provided with symmetrical feeding ports (4). The feeding ports (4) allow the multiple withering cavities (3) to be interconnected and form a continuous S-shape. The withering layers (2) can be used to distribute tea leaves evenly on the withering layers (2) or to drive the tea leaves from the feeding ports (4) into the next withering layer (2). One side of the withering cavity (3) is provided with an air inlet (5) and the other side of the withering cavity (3) is provided with an air outlet (6). The air inlet (5) is provided with a heating air inlet assembly (7). The withering cavity (3) is provided with a temperature sensor (8). The outer wall of the body (1) is provided with a control panel. The heating air inlet assembly (7) and the temperature sensor (8) are electrically connected to the control panel.

2. The intelligent withering device for white tea according to claim 1, characterized in that: The uniformly distributed withering layer (2) is a conveyor belt, which is electrically connected to the control panel.

3. The intelligent withering device for white tea according to claim 2, characterized in that: A support plate (10) is provided at the discharge port (4). One end of the support plate (10) is elastically connected to the inner wall of the main body (1). The other end of the support plate (10) is close to the conveyor belt and has multiple vibrating rods (11) evenly arranged from front to back. A vibration motor (12) is provided at the lower end of the support plate (10). The vibration motor (12) is electrically connected to the control panel.

4. The intelligent withering device for white tea according to claim 3, characterized in that: The air inlet (5) is located on the side near the discharge port (4), and the heating air inlet assembly (7) can close the discharge port (4) when heating.

5. The intelligent withering device for white tea according to claim 2, characterized in that: The withering chamber (3) has two inner walls near the discharge port (4) with mounting grooves (13) connected to the air inlet (5). The mounting grooves (13) extend to the upper and lower conveyor belts. The heating air intake assembly (7) includes a vertical plate (71), an air inlet cylinder (72), a telescopic motor (76), an air inlet pipe (73), a solenoid valve (74), and a heating element (75). The vertical plate (71) is vertically arranged on the left and right sides of the main body (1). The vertical plate (71) is connected to the main body (1) through the telescopic motor (76). Multiple air inlets (72) are provided and inserted one by one into the air inlet groove and the mounting groove (13). The air cylinder (72) is slidably connected to the air inlet groove and the mounting groove (13). One end of the air cylinder (72) outside the main body (1) is connected to the upright plate (71). One end of the air cylinder (72) inside the main body (1) can extend to the end near the conveyor belt to cover the discharge port (4). The air inlet pipe (73) is located on the outside of the main body (1). The air inlet pipe (73) is connected to the end of each air cylinder (72) near the upright plate (71) through the telescopic solenoid valve (74). The heating element (75) is located inside the air cylinder (72). The heating element (75), the telescopic motor (76) and the solenoid valve (74) are all electrically connected to the control panel.

6. The intelligent withering device for white tea according to claim 5, characterized in that: The internal cross-section of the air inlet cylinder (72) is small at one end near the vertical plate (71) and large at the other end away from the vertical plate (71).

7. The intelligent withering device for white tea according to claim 6, characterized in that: A humidity sensor (17) is installed inside the withering chamber (3).

8. The intelligent withering device for white tea according to claim 1, characterized in that: The upper end of the main body (1) is provided with a feeding hopper (14), which is located at the end of the uppermost withering cavity (3) away from its corresponding discharge port (4). The lower end of the main body (1) is provided with a discharge hopper (15), which is located below the discharge port (4) corresponding to the lowermost withering cavity (3). The lower end of the main body (1) is provided with a support column (16).

Images