Tea leaf segmented temperature control drying device
The segmented temperature-controlled drying device divides the tea drying process into three stages: initial drying, secondary drying, and final drying. This solves the problems of uneven tea drying and the inability to produce continuously, achieving uniform heating and continuous production of tea, and improving the quality and aroma retention of tea.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-07
AI Technical Summary
Existing tea drying equipment suffers from inaccurate temperature control, uneven drying, and inability to achieve continuous production. This results in tea that is dry on the outside but wet on the inside, with dull color and loss of aroma, low efficiency, and high energy consumption.
The segmented temperature-controlled drying device divides the drying process into three stages: initial drying, secondary drying, and final drying, with different temperature ranges (90-100℃, 80-90℃, and 70-80℃) set for each stage. Combined with multi-layered staggered conveyor belts and guide plates, it achieves uniform heating and continuous conveying of tea leaves.
This process ensures uniform heating of the tea leaves, preventing localized over-drying or under-drying, thus improving the quality and aroma retention of the tea, supporting continuous tea production, and reducing energy consumption.
Smart Images
Figure CN224094858U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of drying equipment technology, and in particular to a segmented temperature-controlled drying device for tea. Background Technology
[0002] Tea is a popular beverage, and its taste and aroma depend on many factors, including variety, harvesting time, processing methods, and storage conditions. Drying is an indispensable step in tea processing. The main purpose of drying tea is to remove moisture from the tea leaves and prevent them from spoiling. Tea leaves contain a certain amount of moisture, generally between 3% and 7%. If this moisture is not removed in time, the tea will mold and spoil, losing its original flavor and aroma. Drying also promotes the activity of enzymes in the tea leaves, accelerates chemical reactions, and improves the quality of the tea.
[0003] Traditional tea drying equipment is mostly single-temperature zone drying, making it difficult to adjust the temperature in stages. This results in uneven heating of the tea leaves during the drying process, easily leading to problems such as the tea being dry on the outside but damp on the inside, dull color, and loss of aroma. In addition, traditional equipment often cannot achieve continuous production, resulting in low efficiency and high energy consumption. Utility Model Content
[0004] The purpose of this invention is to provide a segmented temperature-controlled drying device for tea, which can solve the problems of inaccurate temperature control, uneven drying, and inability to produce continuously in existing tea drying equipment.
[0005] To achieve the above objectives, a segmented temperature-controlled tea drying device is provided, comprising a housing with openings on both sides. Sealing plates are installed on both sides of the housing to close the openings. A feed hopper is fixedly connected to the upper end of the housing, and a discharge port is provided at the bottom of the housing. A bracket is fixedly connected to the surface of the housing. Two mounting plates are fixedly connected inside the housing, and several conveying mechanisms are staggered between the two mounting plates from top to bottom. A drive motor and a hot air outlet pipe are installed on the side of the mounting plate away from the conveying mechanisms. The drive motor drives the conveying mechanisms to transport tea leaves, and the hot air outlet pipe blows hot air onto the tea leaves transported to the surface of the conveying mechanisms for drying. A support plate is fixedly connected to the surface of the housing. The surface of the housing has heat dissipation vents. The support plate and the heat dissipation vents are located on adjacent sides of the housing openings. An electric hot air blower is fixedly connected to the upper end of the support plate, and each electric hot air blower corresponds to one of several material conveying mechanisms. An air supply pipe is fixedly connected to the output end of the electric hot air blower, and the end of the air supply pipe away from the electric hot air blower is connected to a hot air outlet pipe. An exhaust pipe connected to the heat dissipation vents is fixedly connected to the surface of the housing, and the exhaust pipe is connected to an external exhaust fan to extract humid and hot air from the device. A controller is installed at the upper end of the housing, and an operation panel is fixedly connected to the upper end of the bracket. The controller is electrically connected to each electric hot air blower and is used to set and control the hot air temperature of the electric hot air blower corresponding to each material conveying mechanism. This solution addresses the problems of inaccurate temperature control, uneven drying, and inability to produce continuously in existing tea drying equipment.
[0006] Preferably, a first guide plate is fixedly connected to the inner wall of the housing. Two mounting plates are fixedly connected to both sides of the first guide plate, which guides the tea leaves into the surface of the conveying mechanism. The first guide plate guides the tea leaves, preventing them from passing through the gap between the first guide plate and the housing, thus avoiding tea residue in the device.
[0007] Preferably, a second guide plate is fixedly connected to the bottom of the housing, and the second guide plate is located on the side of the discharge port facing the conveying mechanism. The two sides of the second guide plate are respectively fixedly connected to two mounting plates. The second guide plate guides the dried tea leaves through the discharge port.
[0008] Preferably, the conveying mechanism includes a driving roller, a driven roller, and a conveyor belt. The driving roller and the driven roller are located between two mounting plates, with the driving roller positioned above the driven roller. Both ends of the rotating shafts of the driving roller and the driven roller pass through the mounting plates and are rotatably connected to them via bearings. The output shaft of the drive motor is fixedly connected to one end of the driving roller's rotating shaft via a coupling. The conveyor belt is disposed on the surfaces of the driving roller and the driven roller, with one end of the conveyor belt sequentially wrapping around the surfaces of the driving roller and the driven roller and connecting end to end. The drive motor drives the driving roller to rotate, causing the conveyor belt to convey the tea leaves. The drive motor drives the driving roller to rotate, and in conjunction with the driven roller, causes the conveyor belt to rotate, conveying the tea leaves.
[0009] Preferably, a tensioning roller is provided between the driving and driven belt rollers to tension the conveyor belt. The mounting plate has an adjustment groove on its surface for the sliding of the tensioning roller's shaft, which passes through the adjustment groove. Nuts are provided on opposite sides of both mounting plates, and these nuts are located on the surface of the tensioning roller's shaft and threadedly engage with it. The adjustment groove allows the tension of the conveyor belt to be adjusted via the tensioning roller.
[0010] Preferably, the material conveying mechanism is provided in seven parts, which are divided into a primary drying section, a secondary drying section and a final drying section from top to bottom, and the ratio of the primary drying section, the secondary drying section and the final drying section is 1:2:4.
[0011] Preferably, the temperature range of the initial drying section is 90-100℃, the temperature range of the secondary drying section is 80-90℃, and the temperature range of the final drying section is 70-80℃.
[0012] Preferably, the operation panel is communicatively connected to the controller and is used to set the drying time and temperature parameters for each drying stage, and to display real-time temperature and humidity data.
[0013] The above-mentioned solution has the following beneficial effects:
[0014] 1. The drying process is divided into three stages: initial drying, secondary drying, and final drying, through the material conveying mechanism, and different temperature ranges are set for each stage (such as 90-100℃, 80-90℃, and 70-80℃). This allows for targeted treatment based on the characteristics of the tea at different drying stages, avoiding the loss of color and aroma caused by excessively high or low temperatures, and improving the quality of the tea.
[0015] 2. The multi-layered staggered conveyor belt structure is adopted, and the tea leaves are conveyed layer by layer from top to bottom. Hot air is blown evenly onto the surface of the tea leaves from the hot air outlet pipe. With the help of the guide plate, it is ensured that the tea leaves are heated evenly during the conveying process, avoiding local over-drying or under-drying. This allows the device to support continuous feeding and discharging, realizing continuous operation of tea drying.
[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments;
[0018] Figure 1 This is an overall structural diagram of a segmented temperature-controlled drying device for tea according to the present invention;
[0019] Figure 2 This is an overall structural diagram of the housing and sealing plate of a segmented temperature-controlled drying device for tea according to this utility model;
[0020] Figure 3 This is a front view of the housing of a segmented temperature-controlled drying device for tea according to this utility model;
[0021] Figure 4 This is a cross-sectional view of the shell of a segmented temperature-controlled drying device for tea according to this utility model;
[0022] Figure 5 This is a structural diagram of the internal structure of the shell of a segmented temperature-controlled drying device for tea according to this utility model;
[0023] Figure 6 This is an overall structural diagram of the feeding mechanism of a segmented temperature-controlled drying device for tea according to this utility model.
[0024] Legend:
[0025] 1. Housing; 2. Sealing plate; 3. Feed hopper; 4. Discharge port; 5. Bracket; 6. Mounting plate; 7. Conveying mechanism; 8. Drive motor; 9. Hot air outlet pipe; 10. Support plate; 11. Heat dissipation vent; 12. Electric hot air blower; 13. Air supply pipe; 14. Exhaust pipe; 15. Controller; 16. Operation panel; 17. First guide plate; 18. Second guide plate; 19. Driven belt roller; 20. Driven belt roller; 21. Conveyor belt; 22. Tensioning roller; 23. Nut. Detailed Implementation
[0026] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.
[0027] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4This utility model discloses a segmented temperature-controlled drying device for tea, comprising a housing 1 with openings on both sides and sealing plates 2 for closing the openings. A feed hopper 3 is fixedly connected to the upper end of the housing 1, and a discharge port 4 is opened at the bottom. A bracket 5 is fixedly connected to the surface of the housing 1. Two mounting plates 6 are fixedly connected inside the housing 1, and several conveying mechanisms 7 are staggered between the two mounting plates 6 from top to bottom. A drive motor 8 and a hot air outlet pipe 9 are installed on the side of the mounting plate 6 away from the conveying mechanisms 7. The drive motor 8 drives the conveying mechanisms 7 to transport tea leaves, and the hot air outlet pipe 9 blows hot air onto the surface of the conveying mechanisms 7 to dry the tea leaves. A support plate 10 is fixedly connected to the surface of the housing 1, and a heat dissipation vent 11 is opened on the surface of the housing 1. 10 and heat dissipation vent 11 are located on the adjacent side of the opening of the housing 1. The upper end of the support plate 10 is fixedly connected to an electric hot air blower 12, and the electric hot air blower 12 is respectively corresponding to several material conveying mechanisms 7. The output end of the electric hot air blower 12 is fixedly connected to an air supply pipe 13. The end of the air supply pipe 13 away from the electric hot air blower 12 is connected to a hot air outlet pipe 9. The surface of the housing 1 is fixedly connected to an exhaust pipe 14 that connects to the heat dissipation vent 11. The exhaust pipe 14 is connected to an external exhaust fan to extract the humid and hot air from the extraction device. A controller 15 is installed at the upper end of the housing 1. An operation panel 16 is fixedly connected at the upper end of the bracket 5. The controller 15 is installed at the upper end of the housing 1. The controller 15 is electrically connected to each electric hot air blower 12 and is used to set and control the hot air temperature corresponding to the initial drying section, the secondary drying section and the final drying section respectively.
[0028] like Figure 4 and Figure 5 As shown, a first guide plate 17 is fixedly connected to the inner wall of the housing 1. The two sides of the first guide plate 17 are respectively fixedly connected to two mounting plates 6. The first guide plate 17 guides the tea leaves into the surface of the conveying mechanism 7. The first guide plate 17 guides the tea leaves to avoid them passing through the gap between the first guide plate 17 and the housing 1, which would cause tea leaves to remain in the device.
[0029] like Figure 4 and Figure 5 As shown, a second guide plate 18 is fixedly connected to the bottom of the housing 1, and the second guide plate 18 is located on the side of the discharge port 4 facing the conveying mechanism 7. The two ends of the second guide plate 18 are fixedly connected to two mounting plates 6 respectively. The second guide plate 18 guides the dried tea leaves through the discharge port 4.
[0030] like Figure 6As shown, the conveying mechanism 7 includes a driving roller 19, a driven roller 20, and a conveyor belt 21. The driving roller 19 and the driven roller 20 are located between two mounting plates 6, with the driving roller 19 positioned above the driven roller 20. Both ends of the rotating shafts of the driving roller 19 and the driven roller 20 pass through the mounting plates 6 and are rotatably connected to them via bearings. The output shaft of the drive motor 8 is fixedly connected to one end of the rotating shaft of the driving roller 19 via a coupling. The conveyor belt 21 is disposed on the surfaces of the driving roller 19 and the driven roller 20, with one end of the conveyor belt 21 successively wrapping around the surfaces of the driving roller 19 and the driven roller 20 and connecting them end-to-end. The surface of the conveyor belt 21 is provided with ventilation holes to enhance the penetration of hot air. The drive motor 8 drives the driving roller 19 to rotate, causing the conveyor belt 21 to convey the tea leaves. The drive motor 8 drives the driving roller 19 to rotate, and in conjunction with the driven roller 20, causes the conveyor belt 21 to rotate, conveying the tea leaves.
[0031] like Figure 6 As shown, a tension roller 22 is provided between the driving roller 19 and the driven roller 20. The tension roller 22 tensions the conveyor belt 21. An adjustment groove is provided on the surface of the mounting plate 6 for the sliding of the shaft of the tension roller 22, and the shaft of the tension roller 22 passes through the adjustment groove. Nuts 23 are provided on opposite sides of the two mounting plates 6, and the nuts 23 are located on the surface of the shaft of the tension roller 22 and are threadedly engaged with the shaft. The adjustment groove allows the tension of the conveyor belt 21 to be adjusted via the tension roller 22.
[0032] like Figure 4 and Figure 5 As shown, there are seven material conveying mechanisms 7. The seven material conveying mechanisms 7 are divided into a primary drying section, a secondary drying section and a final drying section from top to bottom. The ratio of the primary drying section, the secondary drying section and the final drying section is 1:2:4. The first layer is the primary drying section (1 unit), the second and third layers are the secondary drying sections (2 units), and the fourth to seventh layers are the final drying sections (4 units).
[0033] like Figure 1 As shown, the controller 15 is electrically connected to the electric hot air blower 12. Each electric hot air blower 12 is independently set and connected to the hot air outlet pipe 9 of the corresponding drying section through the air supply pipe 13. The controller 15 can independently adjust the heating power and air supply temperature of each electric hot air blower 12, thereby realizing different temperature control of the initial drying section, the secondary drying section and the final drying section. It is used to set and control the hot air temperature corresponding to the initial drying section, the secondary drying section and the final drying section respectively. The temperature range of the initial drying section is 90-100℃, which quickly removes surface moisture. The temperature range of the secondary drying section is 80-90℃, which gradually reduces the temperature to maintain the aroma of the tea. The temperature range of the final drying section is 70-80℃, which slows down the temperature to ensure that the internal moisture of the tea leaves evaporates fully and avoids scorching.
[0034] like Figure 1 As shown, the operation panel 16 is connected to the controller 15 for setting the drying time and temperature parameters for each drying stage, and displaying real-time temperature and humidity data.
[0035] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires, and should select appropriate controllers according to actual conditions to meet control requirements. The specific connection and control sequence should refer to the working principle described below, where the electrical connections between the various electrical components are completed in sequence. The detailed connection methods are well-known technologies in the field. The following mainly introduces the working principle and process, and will not describe the electrical control further.
[0036] Working principle: The tea leaves to be dried are fed into the device through the feed hopper 3 and fall onto the conveyor belt 21 of the uppermost conveying mechanism 7. The drive motor 8 drives the active belt roller 19 to rotate, so that the conveyor belt 21 moves along the direction of the driven belt roller 20. The tea leaves are conveyed forward with the conveyor belt 21 to the end, and then guided by the first guide plate 17 to fall naturally to the next layer of conveyor belt 21. The conveyor belts 21 are arranged in an alternating manner. The tea leaves fall layer by layer under the action of gravity and the conveyor belt 21, forming a continuous and orderly conveying path. After being dried layer by layer, the tea leaves fall to the bottom conveyor belt 21. After being conveyed to the end, they are guided by the second guide plate 18 and discharged from the outlet 4. After the electric hot air blower 12 is started, it generates high-temperature hot air, which is conveyed through the air pipe 13 to the corresponding hot air outlet pipe 9 of each drying section. The hot air outlet pipe 9 blows hot air evenly onto the tea leaves on the surface of the conveyor belt 21 to achieve continuous drying of the tea leaves.
[0037] During drying, the initial drying stage (layer 1) is set at 90-100℃ to quickly remove surface moisture from the tea leaves and prevent oxidation. The secondary drying stage (layers 2-3) is set at 80-90℃, gradually lowering the temperature to promote the diffusion of internal moisture and preserve aroma. The final drying stage (layers 4-7) is set at 70-80℃ for slow, low-temperature drying, ensuring even evaporation of moisture from both the inside and outside of the tea leaves to prevent scorching and discoloration. Users can set the temperature and drying time parameters for each stage via the control panel 16. The controller 15 receives the commands and adjusts the output temperature of the electric hot air blower 12 in real time to maintain a stable hot air temperature in each stage. The control panel also displays real-time temperature and humidity data within the drying chamber for easy monitoring and adjustment.
[0038] The large amount of hot and humid air generated during the drying process enters the exhaust pipe 14 through the heat dissipation port 11 on the side of the shell, and is continuously drawn out of the device by an external exhaust fan to avoid the accumulation of heat and moisture affecting the drying effect.
[0039] In the description of this utility model, it should be understood that the terms "coaxial," "bottom," "one end," "top," "middle," "other end," "upper," "side," "top," "inner," "front," "center," and "both ends," 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 utility model 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. At the same time, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "fixed installation," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two elements or the interaction relationship between two elements. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.
Claims
1. A segmented temperature-controlled drying device for tea, comprising: The housing (1) is characterized in that it has openings on both sides, sealing plates (2) for closing the openings are installed on both sides of the housing (1), a feed hopper (3) is fixedly connected to the upper end of the housing (1), a discharge port (4) is opened at the bottom of the housing (1), a bracket (5) is fixedly connected to the surface of the housing (1), two mounting plates (6) are fixedly connected in the housing (1), and several conveying mechanisms (7) are installed alternately from top to bottom between the two mounting plates (6). A drive motor (8) and a hot air outlet pipe (9) are installed on the side of the mounting plate (6) away from the conveying mechanism (7). The drive motor (8) drives the conveying mechanism (7) to convey tea leaves, and the hot air outlet pipe (9) blows hot air to dry the tea leaves conveyed to the surface of the conveying mechanism (7). A support plate (10) is fixedly connected to the surface of the housing (1), and a heat dissipation vent (11) is opened on the surface of the housing (1). The support plate (10) and the heat dissipation port (11) are located on the adjacent side of the opening of the shell (1). The upper end of the support plate (10) is fixedly connected to an electric hot air blower (12), and the electric hot air blower (12) is respectively corresponding to several material conveying mechanisms (7). The output end of the electric hot air blower (12) is fixedly connected to an air supply pipe (13). The end of the air supply pipe (13) away from the electric hot air blower (12) is connected to a hot air outlet pipe (9). The surface of the shell (1) is fixedly connected to an exhaust pipe (14) that connects to the heat dissipation port (11). The exhaust pipe (14) is connected to an external exhaust fan to extract the humid and hot air from the device. The upper end of the shell (1) is equipped with a controller (15). The upper end of the bracket (5) is fixedly connected to an operation panel (16). The controller (15) is electrically connected to each electric hot air blower (12) and is used to set and control the hot air temperature of the electric hot air blower (12) corresponding to each material conveying mechanism (7).
2. The tea segmented temperature-controlled drying device according to claim 1, characterized in that, The inner wall of the housing (1) is fixedly connected to a first guide plate (17), and the two sides of the first guide plate (17) are fixedly connected to two mounting plates (6) respectively. The first guide plate (17) guides the tea leaves into the surface of the conveying mechanism (7).
3. The tea segmented temperature-controlled drying device according to claim 1, characterized in that, The bottom of the housing (1) is fixedly connected to a second guide plate (18), and the second guide plate (18) is located on the side of the discharge port (4) facing the conveying mechanism (7). The two ends of the second guide plate (18) are fixedly connected to two mounting plates (6) respectively.
4. The tea segmented temperature-controlled drying device according to claim 1, characterized in that, The material conveying mechanism (7) includes an active belt roller (19), a driven belt roller (20), and a conveyor belt (21). The active belt roller (19) and the driven belt roller (20) are located between two mounting plates (6), with the active belt roller (19) located above the driven belt roller (20). Both ends of the rotating shafts of the active belt roller (19) and the driven belt roller (20) pass through the mounting plate (6) and are rotatably connected to the mounting plate (6) through bearings. The output shaft of the drive motor (8) is fixedly connected to one end of the rotating shaft of the active belt roller (19) through a coupling. The conveyor belt (21) is located on the surface of the active belt roller (19) and the driven belt roller (20), and one end of the conveyor belt (21) passes around the surface of the active belt roller (19) and the driven belt roller (20) in sequence and is connected end to end. The drive motor (8) drives the active belt roller (19) to rotate so that the conveyor belt (21) conveys the tea leaves.
5. A segmented temperature-controlled drying device for tea according to claim 4, characterized in that, A tensioning roller (22) is provided between the driving belt roller (19) and the driven belt roller (20). The tensioning roller (22) tensions the conveyor belt (21). An adjustment groove is provided on the surface of the mounting plate (6) for the rotating shaft of the tensioning roller (22) to slide. The rotating shaft of the tensioning roller (22) passes through the adjustment groove. Nuts (23) are provided on opposite sides of the two mounting plates (6). The nuts (23) are located on the rotating shaft surface of the tensioning roller (22) and are threadedly engaged with the rotating shaft.
6. The tea segmented temperature-controlled drying device according to claim 4, characterized in that, The material conveying mechanism (7) is specifically provided in seven parts. The seven material conveying mechanisms (7) are divided into a primary drying section, a secondary drying section and a final drying section from top to bottom. The ratio of the primary drying section, the secondary drying section and the final drying section is 1:2:
4.
7. The tea segmented temperature-controlled drying device according to claim 6, characterized in that, The initial drying section has a temperature range of 90-100℃, the secondary drying section has a temperature range of 80-90℃, and the final drying section has a temperature range of 70-80℃.
8. The tea segmented temperature-controlled drying device according to claim 1, characterized in that, The operation panel (16) is connected to the controller (15) for setting the drying time and temperature parameters for each drying stage, and displaying real-time temperature and humidity data.