A heater for preparing traditional Chinese medicine

Abstract

The application discloses a heater for preparing traditional Chinese medicine, and particularly relates to the field of heating devices, which comprises a heating kettle, a fan and a disc type heating pipe are installed at the lower end of the inner cavity of the heating kettle, the disc type heating pipe heats the surrounding air, and the air is blown to the upper cavity of the heating kettle through the fan, a plurality of bearing plates and a plurality of upper convection plates are distributed in a staggered mode at the upper end of the inner cavity of the heating kettle, traditional Chinese medicinal materials which need to be dried are laid on each bearing plate, and a flow guide groove for guiding flow is formed in the surface of the bearing plate, the flow direction of heat flow is changed through the upper convection plates, the lower convection plates and the baffle, the direct impact of heat on the medicinal materials is avoided, the medicinal materials are not excessively burned, a semi-closed chamber is formed by the lower convection plate, a group of upper convection plates and the bearing plates located at the bottom end, heat flow is accumulated in the chamber, a heat preservation area is formed, the flow of air is reduced, heat loss is reduced, the temperature is kept constant, the change of temperature during drying does not affect the medicinal properties, and the drying efficiency is reduced.

Description

Technical Field

[0001] This invention relates to the field of heating device technology, and more specifically, to a heater for the preparation of traditional Chinese medicine. Background Technology

[0002] Chinese Patent CN204514125U discloses a heater for preparing traditional Chinese medicine, comprising a shell, a heating coil, a steam pipe, and a condensate pipe. The heating coil, steam pipe, and condensate pipe are disposed inside the shell, with the steam pipe and condensate pipe arranged vertically. The heating coil is connected to both the steam pipe and the condensate pipe. A steam control valve is provided at the bottom of the steam pipe. The heating coil can use the heat of steam for heating. Steam can be introduced into the steam pipe. The condensate pipe can discharge the condensed water vapor in the heating coil. A temperature sensing element can measure the temperature inside the shell. The temperature sensing tube makes the temperature sensing element measurement more accurate. The shunt pipe is bent to reduce the space occupied. Chinese herbs are the main raw material for traditional Chinese medicine, while animal and insect carcasses are also major sources. Because the sources of Chinese medicinal materials are very abundant, various shapes and materials of semi-finished products are generated during the slicing process in the preparation of Chinese medicine. These semi-finished products require different temperatures due to their different materials. Furthermore, their impact resistance and strength are also different depending on the material. Consequently, it is difficult to ensure the integrity of the Chinese medicine slices and the drying efficiency at the same time in the subsequent heating and drying steps. Therefore, there is an urgent need to develop a preparation method and equipment that can achieve good drying results without causing material loss during the drying process. Summary of the Invention

[0003] To overcome the aforementioned deficiencies of the prior art, the present invention provides a heater for the preparation of traditional Chinese medicine. By setting up an upper convection plate, a lower convection plate, and a baffle plate, the flow direction of the heat flow is changed, avoiding direct heat impact on the medicinal materials and preventing excessive burning of the medicinal materials. Furthermore, the lower convection plate and a set of upper convection plates form a semi-enclosed chamber with the support plate located at the bottom, in which the heat flow is accumulated to form a heat preservation zone, thereby improving the drying efficiency and solving the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a heater for preparing traditional Chinese medicine, comprising a heating vessel, wherein a fan and a disc heating tube are installed at the lower end of the inner cavity of the heating vessel, the disc heating tube heats the surrounding air and blows it to the upper cavity of the heating vessel by the fan; The upper part of the inner cavity of the heating vessel has multiple support plates and multiple upper convection plates arranged in an alternating pattern. Each support plate is covered with Chinese medicinal materials that need to be dried, and the surface of the support plate has a flow guide groove for guiding the flow. Every two upper convection plates are sandwiched between the upper and lower surfaces of the support plates, and the surface of the upper convection plates has an air outlet for guiding the flow. A set of sealing elements is installed through the multiple support plates and multiple upper convection plates, and the sealing elements rotate to seal the upper convection plates. The heating vessel has at least three air inlet pipes installed on its side wall. These multiple air inlet pipes are used to guide the airflow from the lower end of the inner cavity of the heating vessel to the upper end of the inner cavity.

[0005] Preferably, the heating vessel is detachable, with multiple pressure relief ports at the top, multiple air inlets on the side walls, and multiple symmetrical support bars welded to the inner wall.

[0006] Preferably, the heating vessel is fixed with an exhaust pipe at the pressure relief port, and a pressure valve is rotatably installed inside the exhaust pipe.

[0007] Preferably, a temperature sensor for measuring the temperature around the support plate is provided on the side of the heating vessel near the support plate, and an electric valve is installed inside the air inlet pipe, which is rotated to control the connection and blockage of the air inlet pipe.

[0008] Preferably, the support plate includes a center plate and frame strips, and the number of frame strips is multiple sets. One set of frame strips circumferentially surrounds the side of the center plate, and the guide groove circumferentially penetrates the frame strip. A central hole is opened at the center of the center plate. Another set of frame strips circumferentially surrounds the side of the center plate, wherein the frame strip is higher than the center plate.

[0009] Preferably, a set of baffles is enclosed along the side of the frame strip, and the baffles are arched upwards.

[0010] Preferably, the upper convection plate includes an integrally connected side plate and an upper arched plate, and a plurality of air outlets are circumferentially opened on the side plate, with an inclined bent plate welded to each air outlet.

[0011] Preferably, a set of lower convection plates is pressed onto the support bar of the heating vessel. The lower convection plates are located below a set of support plates at the bottom end, and a downwardly arched plate is welded to the center of the lower convection plates.

[0012] Preferably, a set of driving components is installed through the top wall of the heating vessel. The driving components include a motor installed at the top of the heating vessel. The output shaft of the motor is fixedly connected to a set of cylindrical gears through the top wall of the heating vessel. The driving components drive the sealing components to rotate.

[0013] Preferably, the sealing element comprises multiple connecting rods that are inserted together. Each connecting rod has a set of support rings welded to its surface. A lower sealing plate is fixed to the bottom connecting rod, and upper sealing plates are fixed to the other connecting rods. A ring gear is sleeved on the end of the top connecting rod, and the ring gear and the cylindrical gear are meshed and driven together.

[0014] The technical effects and advantages of this invention are as follows: This device can not only meet the requirement of drying a large quantity of similar medicinal materials at the same time, saving workload and reducing drying time, but also meet the requirements of drying different medicinal materials at the same temperature and different medicinal materials at different temperatures, improving the practicality of the heater and reducing workload. At the same time, it avoids the mutual interference of medicinal properties between different medicinal materials, which would cause the medicinal materials to become unusable. This device, by incorporating an upper convection plate, a lower convection plate, and a baffle plate, alters the direction of heat flow, preventing heat from directly impacting the medicinal materials and causing excessive burning. Furthermore, the lower convection plate and a set of upper convection plates form a semi-enclosed chamber with the support plate at the bottom, where heat is stored, creating an insulation zone. This reduces airflow, minimizes heat loss, maintains a constant temperature, and prevents temperature changes during drying from affecting the medicinal properties and reducing drying efficiency. This device is designed with a multi-layer stacked drying method for medicinal materials, which avoids excessive stacking of medicinal materials and achieves the drying purpose without turning them over, reducing drying time and ensuring the integrity of the medicinal materials. At the same time, it utilizes the upward flow of hot air to reuse the heat flow, thereby achieving the purpose of energy saving and environmental protection. This device utilizes multiple air inlet pipes to directly draw heat from the heating chamber, avoiding interference between the medicinal properties of different herbs and expanding the applications of the heater. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the heating vessel of the present invention; Figure 2 This is a cross-sectional view of the structure of a heater used in the preparation of traditional Chinese medicine. Figure 3 Axonometric cross-sectional view of a heater used in the preparation of traditional Chinese medicine; Figure 4 This is a schematic diagram of the overall structure of the support plate of the present invention; Figure 5 This is a schematic diagram of the overall structure of the upper convection plate of the present invention; Figure 6 This is a schematic diagram of the overall structure of the lower convection plate of the present invention; Figure 7 This is a schematic diagram of the overall structure of the sealing element of the present invention; Figure 8 This is a detailed connection diagram of the overall structure of the sealing element of the present invention.

[0016] The attached figures are labeled as follows: 1. Heating vessel; 101. Top cover; 102. Right side plate; 103. Heating box; 104. Left side plate; 105. Pressure relief port; 106. Air inlet; 107. Support bar; 2. Support frame; 3. Fan; 4. Disc heating tube; 5. Upper convection plate; 501. Side plate; 502. Air outlet; 503. Inclined curved plate; 504. Upper arched plate; 6. Bearing plate; 601. Center plate; 6 02. Frame strip; 603. Guide groove; 604. Center hole; 7. Baffle plate; 8. Seal; 801. Connecting rod; 802. Support ring; 803. Upper sealing plate; 804. Lower sealing plate; 805. Ring gear; 9. Drive component; 10. Air outlet pipe; 1001. Pressure valve; 11. Air inlet pipe; 1101. Electric valve; 12. Bearing strip; 13. Lower convection plate; 1301. Lower arched plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Refer to the instruction manual appendix Figures 1-8 As shown: A heater for preparing traditional Chinese medicine includes a heating vessel 1. A support frame 2, a fan 3, and a disc heating tube 4 are installed at the lower end of the inner cavity of the heating vessel 1. The support frame 2 supports the disc heating tube 4 and provides space for the fan 3. The disc heating tube 4 heats the surrounding air and blows it into the upper cavity of the heating vessel 1 via the fan 3. Both the fan 3 and the disc heating tube 4 are equipped with controllers for control. The support frame 2 is vertically inserted into the bottom wall of the heating vessel 1. The contact surface between the support frame 2 and the disc heating tube 4 is arc-shaped to facilitate locking the disc heating tube 4 and ensure its stability. The disc heating tube 4 is arranged in a coil shape, reducing space occupation and saving space. The upper part of the inner cavity of the heating vessel 1 has multiple support plates 6 and multiple upper convection plates 5 arranged in a staggered pattern. Each support plate 6 is covered with medicinal herbs to be dried, and the surface of each support plate 6 has a guide groove 603 for guiding flow. Every two upper convection plates 5 are sandwiched between the upper and lower surfaces of the support plates 6, and the surface of each upper convection plate 5 has an outlet hole 502 for guiding flow. A set of sealing elements 8 is installed through the multiple support plates 6 and the multiple upper convection plates 5, and the sealing elements 8 rotatably seal the upper convection plates 5. In this setup, the heating... The inner cavity of the vessel 1 is divided from bottom to top into a heating cavity, a primary cavity, a secondary cavity, a tertiary cavity, and a top cavity, based on the number of supporting plates 6 and the disc heating tubes 4. The disc heating tubes 4 are placed in the heating cavity, and the three supporting plates 6 are respectively placed in the primary cavity, the secondary cavity, and the tertiary cavity. When the sealing element 8 is not sealed with the convection plate 5, the heating cavity, the primary cavity, the secondary cavity, the tertiary cavity, and the top cavity are connected. When the sealing element 8 is sealed with the convection plate 5, the heating cavity, the primary cavity, the secondary cavity, the tertiary cavity, and the top cavity are independent of each other. The heating vessel 1 has at least three air inlet pipes 11 installed on its side wall. These multiple air inlet pipes are used to guide the airflow from the lower end of the inner cavity of the heating vessel 1 to the upper end of the inner cavity. The air inlet pipes 11 are used to distribute the heat flow of the heating chamber to the primary, secondary, and tertiary cavities through the multiple air inlet pipes 11. When the sealing member 8 is not sealed with the convection plate 5, the fan 3 blows the heat from the disc heating tube 4 to the upper cavity of the heating vessel 1. The temperature is transferred from bottom to top, and as the heating time continues, the temperature of the inner cavity of the heating vessel 1 eventually reaches a uniform level. When the sealing member 8 is sealed with the convection plate 5, each chamber is independent. The heat is distributed to the primary, secondary, and tertiary cavities through the multiple air inlet pipes 11. The temperatures in the primary, secondary, and tertiary cavities can be controlled to be different.

[0019] Specifically, the heating vessel 1 is detachable, with multiple pressure relief ports 105 at the top, multiple air inlets 106 on the side walls, and multiple symmetrical support bars 107 welded to the inner wall; specifically, refer to Figure 1As shown, the heating vessel 1 includes a top cover 101, a right side plate 102, a heating chamber 103, and a left side plate 104. The top cover 101, right side plate 102, heating chamber 103, and left side plate 104 are detachably installed. The side wall of the heating chamber 103 has a slot for inserting the right side plate 102 and the left side plate 104, and the top of the right side plate 102, heating chamber 103, and left side plate 104 has a slot for inserting the top cover 101. The various parts of the heating vessel 1 are stably connected by inserting them together. Multiple pressure relief ports 105 are provided on the side of the top cover 101 near the right side plate 102. The pressure relief ports 105 are used to balance the increased air pressure in the inner cavity of the heating vessel 1 due to high temperature. Multiple air inlets 106 are provided on the surface of the left side plate 104. The air inlets 106 are used to draw the high temperature from the lower end of the heating vessel 1 to the upper end. Multiple symmetrical support bars 107 are welded to the opposite surfaces of the right side plate 102 and the left side plate 104 to ensure that the upper convection plate 5 or the bearing plate 6 installed on the support bars 107 are placed in a horizontal state.

[0020] Specifically, the heating vessel 1 is located at the pressure relief port 105, where a vent pipe 10 is fixed. A pressure valve 1001 is rotatably installed inside the vent pipe 10. Figure 2 As shown, there are no fewer than three sets of air outlet pipes 10. The three sets of air outlet pipes 10 are connected to the first-stage chamber, the second-stage chamber, and the third-stage chamber, respectively. The pressure valves 1001 are controlled according to the pressure difference between the first-stage chamber and the outside of the heating vessel 1, the pressure difference between the second-stage chamber and the outside of the heating vessel 1, and the pressure difference between the third-stage chamber and the outside of the heating vessel 1, respectively, so as to ensure the stability of the air pressure in the first-stage chamber, the second-stage chamber, and the third-stage chamber.

[0021] Specifically, a temperature sensor for measuring the temperature around the support plate 6 is provided on the side of the heating vessel 1 near the support plate 6. An electric valve 1101 is installed inside the air inlet pipe 11. The connection and blockage of the air inlet pipe 11 are controlled by rotating the electric valve 1101. When the temperature sensors in the first-stage, second-stage, and third-stage chambers reach the corresponding drying temperature of the medicinal materials in the chamber, the controller controls the fan 3 and the disc heating tube 4 to start and stop. The electric valve 1101 controls the connection and blockage of the air inlet pipe 11.

[0022] Specifically, the support plate 6 includes a central plate 601 and frame strips 602. There are multiple sets of frame strips 602. One set of frame strips 602 circumferentially surrounds the side of the central plate 601, and the guide groove 603 circumferentially penetrates the frame strip 602. A central hole 604 is opened at the center of the central plate 601. Another set of frame strips 602 circumferentially surrounds the side of the central plate 601. The frame strips 602 are higher than the central plate 601 to prevent the medicinal materials from being exposed to sunlight.

[0023] Specifically, a set of baffles 7 are enclosed along the side of the frame strip 602, and the baffles 7 are arched upwards.

[0024] Specifically, the upper convection plate 5 includes an integrally connected side plate 501 and an upper arched plate 504. Multiple air outlets 502 are circumferentially opened on the side plate 501. An inclined curved plate 503 is welded to each air outlet 502. The air outlets 502 guide the hot air around the lower support plate 6. The guided hot air is sprayed obliquely upward through the inclined curved plate 503. The obliquely sprayed hot air flows out through the guide groove 603 on the surface of the upper support plate 6. After being deflected by the baffle plate 7, the hot air impacts the upper arched plate 504. The hot air impacting the upper arched plate 504 is reflected onto the medicinal materials in the central plate 601 to dry the medicinal materials. At the same time, the hot air is stored in the semi-sealed space of the two upper convection plates 5, and the heat is not easily dissipated. The medicinal materials are slowly dried at a stable temperature, which ensures the medicinal properties of the medicinal materials and reduces energy loss.

[0025] Specifically, a set of lower convection plates 13 are pressed onto the support bar 107 of the heating vessel 1. The lower convection plates 13 are located below a set of support plates 6 at the bottom end. A downwardly arched lower arched plate 1301 is welded to the center of the lower convection plates 13. (Refer to...) Figure 5 and Figure 6 As shown, the upper convection plate 5 and the lower convection plate 13 have almost the same structure. The difference is that the upper convection plate 5 has an upward-arched upper arched plate 504 welded to the center, and the lower convection plate 13 has a downward-arched lower arched plate 1301 welded to the center. The hot flow heated by the disc heating tube 4 flows to the lower convection plate 13, spreads upward along the surface of the lower convection plate 13, and flows out through the holes on the surface of the lower convection plate 13. The lower convection plate 13 prevents the heat from directly hitting the central plate 601, causing the central plate 601 to be too hot and causing the medicinal materials to be overburned. In addition, the lower convection plate 13 and a set of upper convection plates 5 form a semi-closed chamber with the support plate 6 located at the bottom.

[0026] Specifically, such as Figure 2 , Figure 7 and Figure 8 As shown, a set of driving components 9 is installed through the top wall of the heating vessel 1. The driving component 9 includes a motor installed at the top of the heating vessel 1. The output shaft of the motor is fixedly connected to a set of cylindrical gears through the top wall of the heating vessel 1. The driving component 9 drives the sealing component 8 to rotate.

[0027] Specifically, the seal 8 includes multiple connecting rods 801 that are connected by inserts. The bottom connecting rod 801 is fixed with a lower sealing plate 804, and the other connecting rods 801 are fixed with an upper sealing plate 803. The lower sealing plate 804 is attached to the surface of the lower convection plate 13 to seal the lower convection plate 13, and the upper sealing plate 803 is attached to the surface of the upper convection plate 5 to seal the upper convection plate 5. Each connecting rod 801 has a set of support rings 802 welded to its surface. The support rings 802 are used to support the connecting rods 801, so that the connecting rods 801 are vertically inserted into the center plate 601, or so that the connecting rods 801 are suspended on the seal 8 on the center plate 601. The purpose is to achieve common rotation and facilitate disassembly. The end of the top connecting rod 801 is sleeved with a ring gear 805, and the ring gear 805 and the cylindrical gear are meshed and driven.

[0028] It is worth noting that the bottom of the heating vessel 1 is provided with a round hole for introducing airflow. A one-way valve is installed on the round hole, allowing air to enter the inner cavity of the heating vessel 1 from the outside through the round hole. Secondly, a control center is also provided on the rear wall of the heating vessel 1 for inputting the types and categories of medicinal materials. The control center, controller and temperature sensor are integrated. Working principle: This device is multi-layered and can dry different types and quantities of medicinal materials at different temperatures. First, the medicinal materials to be dried are laid on the support plate 6. The upper convection plate 5 and the support plate 6 are installed alternately on the support strips 107 on the surface of the right side plate 102 and the left side plate 104. At the same time, the lower convection plate 13 is installed in the heating box 103. Meanwhile, the sealing element 8 is disassembled and inserted into the upper convection plate 5, the support plate 6 and the lower convection plate 13 in sequence to realize the connection and installation of the upper convection plate 5, the support plate 6 and the sealing element 8. The heating chamber of the heating box 103 is also provided with a support strip 12 for the sealing element 8. Lift up the right side plate 102, the left side plate 104, the upper convection plate 5, the bearing plate 6, and the seal 8 together, insert them into the heating box 103, and then insert the top cover 101. The installation is complete. When a medicinal material is being dried inside the heating vessel 1, and the same medicinal material is laid flat on the central plate 601, the rotating seal 8, the upper sealing plate 803, and the lower sealing plate 804 are not sealing the upper convection plate 5, respectively. The disc heating tube 4 heats the heating chamber of the heating vessel 1, and the fan 3 blows the airflow in the heating chamber step by step into the first-stage, second-stage, and third-stage chambers, simultaneously drying the multiple layers of medicinal material. The disc heating tube 4 and the fan 3 operate intermittently to prevent the fan 3 from drawing in external airflow. Introduced through a round hole, the heat rises to the upper chamber of the heating vessel 1 before being heated to a certain temperature. When the fan 3 rotates and the one-way valve opens, the primary, secondary, and tertiary chambers are sealed by the upper convection plate 5 and the lower convection plate 13. Through intermittent and continuous heat transfer, the heat is transferred to ensure that the multi-layered medicinal materials are always at a constant temperature, preventing temperature changes from altering the medicinal properties. At the same time, the upper convection plate 5 and the lower convection plate 13 form a semi-sealed environment for the medicinal materials, reducing airflow, minimizing heat loss, and maintaining a constant temperature. When different medicinal materials are dried in heating kettle 1, but the drying temperature of different medicinal materials is the same, the above operation can also be used. However, it is required that such medicinal materials can be kept in the same sealed space for a long time at high temperature, and the medicinal properties of the medicinal materials do not interfere with each other. When the medicinal properties of different medicinal materials interfere with each other, the rotary seal 8, the upper sealing plate 803 seals the upper convection plate 5, the lower sealing plate 804 seals the lower convection plate 13, the electric valve 1101 opens, and the intermittent opening time of the electric valve 1101 is changed according to the temperature required by different medicinal materials. The fan 3 is turned on, and the air inlet pipe 11 introduces the heat flow in the heating chamber into the first-level chamber, the second-level chamber and the third-level chamber. According to the different temperatures of the medicinal materials in different chambers, the opening time of the electric valve 11 is changed proportionally, and the proportion of heat flow introduced into the chamber by the air inlet pipe 11 is different. When the chamber temperature is higher than the required drying temperature due to heat transfer and other factors, the electric valve 1101, fan 3 and check valve of the corresponding air inlet pipe 11 are opened at the same time to cool it down by directly introducing external airflow. The original hot air in the chamber is introduced into the air outlet pipe 10 due to air pressure and is depressurized through the pressure valve 1001.

[0029] This device can not only meet the requirement of drying a large quantity of similar medicinal materials at the same time, saving workload and reducing drying time, but also meet the requirements of drying different medicinal materials at the same temperature and different medicinal materials at different temperatures, improving the practicality of the heater and reducing workload. At the same time, it avoids the mutual interference of medicinal properties between different medicinal materials, which would cause the medicinal materials to become unusable. This device, by setting up an upper convection plate 5, a lower convection plate 13, and a baffle plate 7, changes the direction of heat flow, preventing heat from directly hitting the medicinal materials and causing them to be over-burned. Secondly, the lower convection plate 13 and a set of upper convection plates 5 form a semi-enclosed chamber with the support plate 6 located at the bottom, where the heat flow is stored, forming a heat preservation zone, reducing airflow, reducing heat loss, maintaining a constant temperature, and preventing temperature changes during drying from affecting the medicinal properties and reducing drying efficiency. This device is designed with a multi-layer stacked drying method for medicinal materials, which avoids excessive stacking of medicinal materials and achieves the drying purpose without turning them over, reducing drying time and ensuring the integrity of the medicinal materials. At the same time, it utilizes the upward flow of hot air to reuse the heat flow, thereby achieving the purpose of energy saving and environmental protection. This device utilizes multiple air inlet pipes 11 to directly draw heat from the heating chamber, avoiding interference between the medicinal properties of different herbs and expanding the applications of the heater.

[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heater for preparing traditional Chinese medicine, comprising a heating vessel (1), characterized in that: A fan (3) and a disc heating tube (4) are installed at the lower end of the inner cavity of the heating vessel (1). The disc heating tube (4) heats the surrounding air and blows it to the upper cavity of the heating vessel (1) through the fan (3). The upper part of the inner cavity of the heating vessel (1) has multiple support plates (6) and multiple upper convection plates (5) arranged in an alternating manner. Each support plate (6) is covered with Chinese medicinal materials that need to be dried, and the surface of the support plate (6) is provided with a flow guide groove (603) for guiding the flow. Every two upper convection plates (5) are sandwiched on the upper and lower surfaces of the support plate (6), and the surface of the upper convection plate (5) is provided with an air outlet (502) for guiding the flow. A set of sealing elements (8) is installed through the multiple support plates (6) and multiple upper convection plates (5), and the sealing elements (8) rotate to seal the upper convection plates (5). The heating vessel (1) has at least three air inlet pipes (11) installed on its side wall. The multiple air inlet pipes are used to guide the airflow from the lower end of the inner cavity of the heating vessel (1) to the upper end of the inner cavity. The support plate (6) includes a center plate (601) and frame strips (602). There are multiple sets of frame strips (602). One set of frame strips (602) circumferentially surrounds the side of the center plate (601), and the guide groove (603) circumferentially penetrates the frame strip (602). A central hole (604) is opened at the center of the center plate (601). Another set of frame strips (602) circumferentially surrounds the side of the center plate (601), wherein the frame strips (602) are higher than the center plate (601). A set of baffles (7) is enclosed along the side of the frame strip (602), and the baffles (7) are arched upwards; The upper convection plate (5) includes a side plate (501) and an upper arched plate (504) that are integrally connected. Multiple air outlets (502) are provided in the side plate (501) in a circumferential direction. A slanted bent plate (503) is welded to each air outlet (502). A set of lower convection plates (13) are pressed on the support bar (107) of the heating vessel (1). The lower convection plates (13) are located below a set of support plates (6) at the bottom end. A downward arched plate (1301) is welded to the center of the lower convection plates (13).

2. The heater for preparing traditional Chinese medicine according to claim 1, characterized in that: The heating vessel (1) is detachable. Multiple pressure relief ports (105) are provided at the top of the heating vessel (1), multiple air inlets (106) are provided on the side wall, and multiple symmetrical support bars (107) are welded on the inner wall.

3. A heater for preparing traditional Chinese medicine according to claim 2, characterized in that: The heating vessel (1) is fixed with an exhaust pipe (10) at the pressure relief port (105), and a pressure valve (1001) is rotatably installed inside the exhaust pipe (10).

4. A heater for preparing traditional Chinese medicine according to claim 3, characterized in that: The heating vessel (1) is provided with a temperature sensor on the side near the support plate (6) for measuring the temperature around the support plate (6). An electric valve (1101) is installed inside the air inlet pipe (11). The connection and blockage of the air inlet pipe (11) are controlled by rotating the electric valve (1101).

5. A heater for preparing traditional Chinese medicine according to claim 4, characterized in that: A set of driving components (9) is installed through the top wall of the heating vessel (1). The driving component (9) includes a motor installed at the top of the heating vessel (1). The output shaft of the motor is fixedly connected to a set of cylindrical gears through the top wall of the heating vessel (1). The driving component (9) drives the sealing component (8) to rotate.

6. A heater for preparing traditional Chinese medicine according to claim 5, characterized in that: The sealing element (8) includes multiple connecting rods (801) that are connected by inserts. Each connecting rod (801) has a set of support rings (802) welded to its surface. The connecting rod (801) at the bottom end is fixed with a lower sealing plate (804), and the other connecting rods (801) are fixed with upper sealing plates (803). The end of the connecting rod (801) at the top end is fitted with a ring gear (805), and the ring gear (805) and the cylindrical gear are meshed and driven together.

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