Drying machine for microbial agent production

Abstract

The utility model discloses a drying -machine for microbial inoculant production, including shallow, the top fixed connection of shallow has support frame. The utility model discloses through shallow can drive drying -machine whole flexible removal, satisfies the position adjustment demand under different work scene, ensures that drying -in -oven keeps structural stability in the removal and drying operation process, avoids the influence drying operation because of equipment sway, through three annular even arrangement's electric dryer, can heat in drying groove from all directions, cooperates and has the drying net basket of ventilative function, can let inoculant contact heat fully, stirring motor drives stirring axle and stirring strip to rotate in drying net basket simultaneously, can stir inoculant, prevents the inoculant accumulation and leads to partial drying -in -sufficient, significantly improves drying -evenness, and drying net basket is connected with screw ring thread, is convenient for drying -in -after dismantling cleaning or replacement, and the operation convenience greatly improves.

Description

Technical Field

[0001] This utility model relates to the field of microbial agent production technology, specifically a dryer for microbial agent production. Background Technology

[0002] In the industrial production of microbial agents, drying is a crucial step in ensuring agent stability and extending shelf life. The core requirements are to achieve uniform drying of the agents, prevent damage to their activity during the drying process, and simultaneously ensure ease of operation and adaptability to different production scenarios. However, current microbial agent drying equipment on the market still suffers from numerous technical challenges in practical applications, making it difficult to meet the demands of efficient and high-quality production.

[0003] First, most existing drying equipment is fixed-installation, lacking flexible mobility. When the work area needs to be adjusted within the production workshop, or equipment needs to be moved between multiple production stations, external lifting equipment or multiple people are often required for transport. This is cumbersome and time-consuming, reducing the flexibility of production scheduling and potentially causing damage to equipment components due to collisions during transport, increasing maintenance costs and the risk of production interruption. Meanwhile, while some mobile drying equipment is mobile, its support structure is poorly designed, making it prone to shaking during operation. This affects the stability of the drying operation and may even cause the microbial agent to spill, resulting in raw material waste.

[0004] Secondly, the drying uniformity of existing equipment is generally insufficient. Most drying equipment uses only a single heating source or a local heating structure, resulting in uneven heat distribution in the drying chamber. This can easily lead to local overheating or undried conditions of the microbial agent. Overheating will destroy the activity of the microbial agent, causing it to become ineffective; undried conditions will cause the moisture content of the agent to exceed the standard, making it prone to mold growth during storage and seriously affecting product quality.

[0005] Finally, the drying containers of existing equipment are mostly fixed integrated structures, which makes it difficult to remove the bacterial agent and clean the container after drying. This results in low operating efficiency, and incomplete cleaning can easily cause residual bacterial agent to contaminate subsequent batches of bacterial agent, posing a risk of cross-contamination.

[0006] Therefore, a dryer for the production of microbial agents is needed to solve the above-mentioned problems. Utility Model Content

[0007] To address the problems mentioned in the background art, the purpose of this utility model is to provide a dryer for the production of microbial agents, which has the advantages of flexible equipment movement and stable support, high drying uniformity, convenient operation and strong adaptability to operation, and solves the problems of poor mobility and unstable support, insufficient drying uniformity, cumbersome operation and low efficiency, and limited operation scenarios of existing microbial agent drying equipment.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a dryer for producing microbial agents, comprising a trolley, a support frame fixedly connected to the top of the trolley, a drying chamber fixedly connected to the top of the support frame, a drying trough formed on the top of the drying chamber, three evenly arranged circular electric dryers installed inside the drying trough, a control box containing a battery fixedly connected to the top of the trolley, a support bar fixedly connected to the top of the control box, a lifting groove formed on the side of the support bar near the drying chamber, a lead screw rotatably connected inside the lifting groove via a bearing, and a lifting motor fixedly connected to the bottom of the lead screw via a coupling. The screw rod is fixedly connected to the support bar. A lifting block is threadedly connected to the surface of the screw rod, and the surface of the lifting block is slidably connected to the lifting groove. A connecting bar is fixedly connected to the side of the lifting block near the drying box. A box cover is fixedly connected to the bottom of the connecting bar, and the box cover is located directly above the drying box and works in conjunction with it. A threaded ring is fixedly connected to the bottom of the box cover. A breathable drying basket is threadedly connected to the inner wall of the threaded ring. A stirring motor is fixedly connected to the top of the connecting bar. A stirring shaft is fixedly connected to the output shaft of the stirring motor through a coupling. Multiple evenly arranged stirring bars are fixedly connected to the bottom of the stirring shaft, and the stirring bars are located inside the drying basket.

[0009] As a preferred embodiment of this utility model, the bottom of the drying box is provided with an installation port, which is connected to the drying trough. A circulating fan is installed inside the installation port, and the circulating fan is used in conjunction with the electric dryer.

[0010] As a preferred embodiment of this utility model, a temperature sensor is provided on the inner wall of the drying oven, and the temperature sensor is electrically connected to the control box. A temperature display is fixedly connected to the top of the oven cover, and the temperature display works in conjunction with the temperature sensor.

[0011] As a preferred embodiment of this utility model, a pressure sensor is provided on the inner wall of the drying oven, and the pressure sensor is electrically connected to the control box. A pressure balancing valve is fixedly connected to the top of the oven cover, and the pressure balancing valve is used in conjunction with the pressure sensor.

[0012] As a preferred embodiment of this invention, the surface of the support bar is symmetrically provided with a limiting groove about the lifting groove, and the surface of the connecting bar is symmetrically fixedly connected with a limiting block about the lifting block, and the limiting block is slidably connected with the limiting groove.

[0013] As a preferred embodiment of this invention, the surface of the stirring shaft is fixedly connected with spiral blades, and the stirring bars at the same height are fixedly connected with disturbance bars.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model allows for flexible movement of the entire dryer via a trolley, meeting the position adjustment needs in different working scenarios. Simultaneously, the support frame on top of the trolley provides stable support to the drying chamber, ensuring structural stability during movement and drying operations, preventing equipment shaking from affecting the drying process. Three evenly arranged circular electric dryers are installed inside the drying chamber's drying trough, providing multi-directional heating. The ventilated drying basket, connected to the lid via a threaded ring, allows the microbial agent to fully contact the heat. Simultaneously, the stirring motor at the top of the connecting strip drives the stirring shaft and stirring strip to rotate within the drying basket, agitating the microbial agent and preventing accumulation that could lead to incomplete drying, significantly improving drying uniformity. The threaded connection between the drying basket and the threaded ring facilitates disassembly, cleaning, or replacement after drying. The feed hopper on top of the lid allows for easy addition of the microbial agent to be dried, and the discharge pipe at the bottom of the drying basket facilitates the discharge of the dried agent, greatly improving operational convenience.

[0015] 2. This utility model, through the cooperation of the lead screw, lifting motor and lifting block in the support bar at the top of the control box, can drive the connecting bar to move the box cover up and down stably, so as to achieve precise docking and opening and closing of the box cover and the drying box. This avoids structural damage caused by docking deviation or uneven force when manually operating the box cover. At the same time, the battery in the control box can power the equipment, ensuring that the drying operation can be carried out normally in the absence of external power supply, effectively expanding the applicable scenarios of the equipment. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the structure of this utility model when unfolded; Figure 3 This is a partial cross-sectional perspective view of the structure of this utility model; Figure 4 This is a three-dimensional schematic diagram of the drying basket of this utility model.

[0017] In the diagram: 1. Trolley; 2. Support frame; 3. Drying box; 4. Drying trough; 5. Electric dryer; 6. Control box; 7. Support bar; 8. Lead screw; 9. Lifting motor; 10. Lifting block; 11. Connecting bar; 12. Box cover; 13. Threaded ring; 14. Drying basket; 15. Stirring motor; 16. Stirring shaft; 17. Stirring bar; 18. Circulating fan; 19. Temperature sensor; 20. Temperature display instrument; 21. Pressure sensor; 22. Air pressure balance valve; 23. Limit block; 24. Spiral blade; 25. Disruptor bar. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] like Figures 1 to 4 As shown, this utility model provides a dryer for the production of microbial agents, including a trolley 1, a support frame 2 fixedly connected to the top of the trolley 1, a drying chamber 3 fixedly connected to the top of the support frame 2, a drying trough 4 opened on the top of the drying chamber 3, and three evenly arranged circular electric dryers 5 installed inside the drying trough 4. A control box 6 containing a battery is fixedly connected to the top of the trolley 1, a support bar 7 is fixedly connected to the top of the control box 6, a lifting groove is opened on the side of the support bar 7 near the drying chamber 3, a lead screw 8 is rotatably connected to the inside of the lifting groove via a bearing, a lifting motor 9 is fixedly connected to the bottom of the lead screw 8 via a coupling, and the lifting motor 9 is fixedly connected to the support bar 7. A lifting block 10 is threadedly connected to the surface of the lead screw 8, and the surface of the lifting block 10 is slidably connected to the lifting groove. A connecting bar 11 is fixedly connected to the side of the lifting block 10 near the drying chamber 3, and a box cover 12 is fixedly connected to the bottom of the connecting bar 11, and the box cover 12 is located directly above the drying chamber 3 and works in conjunction with it. A threaded ring 13 is fixedly connected to the bottom of the box cover 12. A drying basket 14 with a breathable function is threadedly connected to the inner wall of the threaded ring 13. The drying basket 14 can be disassembled and replaced according to actual needs, thereby avoiding cross-mixing of different batches of microbial agents. A discharge pipe is provided at the bottom of the drying basket 14. A feed hopper is connected to the top of the box cover 12 and is located above the drying basket 14. The feed hopper is equipped with a flip-top lid, which can achieve a sealed isolation from the outside when closed. A waste discharge port is connected to the bottom of the drying box 3. A sealing cap is threadedly connected to the bottom of the waste discharge port. Impurities generated during the drying process can fall into the bottom of the drying tank 4 through the mesh of the drying basket 14 and are finally discharged through the waste discharge port. A stirring motor 15 is fixedly connected to the top of the connecting strip 11. The output shaft of the stirring motor 15 is fixedly connected to the stirring shaft 16 through a coupling. Multiple evenly arranged stirring strips 17 are fixedly connected to the bottom of the stirring shaft 16 and are located inside the drying basket 14.

[0020] refer to Figure 3 The bottom of the drying oven 3 has an installation port that is connected to the drying trough 4. A circulating fan 18 is installed inside the installation port and is used in conjunction with the electric dryer 5. A removable filter screen is fixedly connected to the bottom of the circulating fan 18.

[0021] As a technical optimization of this utility model, the circulating fan 18 can accelerate the air flow in the drying tank 4, so that the heat generated by the electric dryer 5 is evenly distributed inside the drying tank 4, thereby improving the drying uniformity of the microbial agent; at the same time, the detachable filter screen can filter the air drawn in by the circulating fan 18, preventing impurities in the air from entering the drying tank 4 and contaminating the microbial agent, and the detachable design of the filter screen facilitates later cleaning and replacement.

[0022] refer to Figure 1 and Figure 3 A temperature sensor 19 is installed on the inner wall of the drying oven 3, and the temperature sensor 19 is electrically connected to the control box 6. A temperature display 20 is fixedly connected to the top of the oven cover 12, and the temperature display 20 works in conjunction with the temperature sensor 19.

[0023] As a technical optimization of this utility model, the temperature sensor 19 can monitor the temperature inside the drying tank 4 in real time and transmit the temperature data to the control box 6. After processing the data, the control box 6 feeds back the temperature information to the temperature display instrument 20. The staff can intuitively understand the temperature inside the drying tank 4 through the temperature display instrument 20, so as to adjust the working status of the electric dryer 5 in a timely manner according to the drying requirements of the microbial agent through the control box 6, ensuring that the drying temperature is within a suitable range, avoiding the destruction of the activity of the microbial agent by excessively high temperature or the impact of drying efficiency by excessively low temperature.

[0024] refer to Figure 2 and Figure 3 The inner wall of the drying oven 3 is equipped with a pressure sensor 21, which is electrically connected to the control box 6. The top of the oven cover 12 is fixedly connected with a pressure balance valve 22, which works in conjunction with the pressure sensor 21.

[0025] As a technical optimization of this utility model, the pressure sensor 21 can detect the air pressure in the drying tank 4 in real time and transmit the air pressure data to the control box 6. When the air pressure in the drying tank 4 is too high, the control box 6 controls the air pressure balance valve 22 to open, releasing some of the gas in the drying tank 4 and reducing the air pressure in the tank. When the air pressure in the tank is too low, the air pressure balance valve 22 can draw in external air to replenish the air pressure in the tank, thereby achieving automatic balance of air pressure in the drying tank 4 and avoiding damage to the drying box 3 or affecting the drying quality of microbial agents due to abnormal air pressure.

[0026] refer to Figure 3 The surface of the support bar 7 is symmetrically provided with a limiting groove about the lifting groove, and the surface of the connecting bar 11 is symmetrically fixedly connected with a limiting block 23 about the lifting block 10, and the limiting block 23 is slidably connected with the limiting groove.

[0027] As a technical optimization of this utility model, when the lifting motor 9 drives the lead screw 8 to rotate, and the lifting block 10 moves up and down along the lifting groove, the connecting strip 11 moves synchronously with the lifting block 10. At this time, the limiting block 23 slides along the limiting groove. Through the cooperation of the limiting block 23 and the limiting groove, the movement direction of the lifting block 10 and the connecting strip 11 can be restricted, so as to prevent the lifting block 10 from rotating circumferentially with the lead screw 8, and ensure that the connecting strip 11 drives the box cover 12 to rise and fall stably, and ensure that the box cover 12 is accurately connected with the drying box 3.

[0028] refer to Figure 3 Spiral blades 24 are fixedly connected to the surface of the stirring shaft 16, and disturbance bars 25 are fixedly connected between the stirring bars 17 at the same height.

[0029] As a technical optimization of this utility model, the stirring motor 15 drives the stirring shaft 16 to rotate. At this time, the stirring bar 17 rotates synchronously with the stirring shaft 16 to stir the microbial agent in the drying basket 14, preventing the accumulation of the agent and resulting in insufficient drying in some areas. During the rotation, the spiral blade 24 can turn the microbial agent at the bottom of the drying basket 14 upward, further improving the uniformity of the agent's stirring. At the same time, the disturbing bar 25 can break the stable flow trajectory formed by the agent during the stirring process, enhance the stirring effect, and allow the agent to fully contact the heat, thereby improving the drying efficiency and quality.

[0030] The working principle and usage process of this utility model: When using this dryer: 1. Preparation stage: First, move the entire microbial agent production dryer to the designated working position using the trolley 1 to ensure that the equipment is placed stably; then check whether the battery in the control box 6 has sufficient power and confirm that the removable filter screen is correctly installed at the bottom of the circulating fan 18. Next, install the drying basket 14 on the inner wall of the threaded ring 13 at the bottom of the cover 12 using the threaded connection to ensure that the installation is firm. After starting the lifting motor 9 to raise the cover 12, open the sealing structure of the feed hopper connected to the top of the cover 12 and pour the microbial agent to be dried into the drying basket 14 through the feed hopper. After pouring, close the sealing structure of the feed hopper. 2. Equipment Closure Stage: The lifting motor 9 is started through the control box 6. The output shaft of the lifting motor 9 drives the lead screw 8 to rotate around the bearing inside the lifting groove opened on one side of the support bar 7 through the coupling. Since the lead screw 8 is threadedly connected to the lifting block 10 and the lifting block 10 is slidably connected to the lifting groove, the limiting block 23 symmetrically fixedly connected to the surface of the connecting bar 11 about the lifting block 10 slides along the limiting groove symmetrically opened on the surface of the support bar 7 about the lifting groove, limiting the movement of the lifting block 10 and preventing the lifting block 10 from rotating circumferentially with the lead screw 8. This allows the lifting block 10 to drive the connecting bar 11 and the box cover 12 fixedly connected to the bottom of the connecting bar 11 to move downward synchronously until the box cover 12 is precisely aligned and closed with the drying box 3 fixedly connected to the top of the support frame 2, and the lifting motor 9 is turned off.

[0031] 3. Drying Operation Stage: The control box 6 activates the three evenly arranged circular electric dryers 5 installed inside the drying trough 4 at the top of the drying chamber 3, and the circulating fan 18 installed inside the mounting port at the bottom of the drying chamber 3. The electric dryers 5 generate heat to heat the inside of the drying trough 4, while the circulating fan 18 accelerates airflow within the drying trough 4, ensuring even heat distribution. Simultaneously, the removable filter at the bottom of the circulating fan 18 filters the intake air, preventing impurities from entering the drying trough 4 and contaminating the microbial agent. During this process, a temperature sensor 19 installed on the inner wall of the drying chamber 3 monitors the temperature inside the drying trough 4 in real time and transmits the data to the control box 6. The control box 6 processes the data and feeds it back to the temperature display 20 fixedly connected to the top of the chamber cover 12. Operators observe the temperature through the temperature display 20, and if the temperature is abnormal, the operating status of the electric dryers 5 can be adjusted via the control box 6. Meanwhile, the inner wall of the drying chamber 3 is equipped with… The pressure sensor 21 detects the air pressure inside the drying tank 4 in real time and transmits the data to the control box 6. If the air pressure is too high, the air pressure balance valve 22, which is fixedly connected to the top of the control box cover 12, opens to release some gas. If the air pressure is too low, the air pressure balance valve 22 draws in external air to achieve air pressure balance. Then, the control box 6 starts the stirring motor 15, which is fixedly connected to the top of the connecting strip 11. The output shaft of the stirring motor 15 drives the stirring shaft 16 to rotate through the coupling. Multiple uniformly arranged stirring strips 17, which are fixedly connected to the bottom of the stirring shaft 16, rotate with the stirring shaft 16 inside the drying basket 14 to stir the microbial agent and prevent accumulation. At the same time, the spiral blades 24, which are fixedly connected to the surface of the stirring shaft 16, turn the agent at the bottom of the drying basket 14 upward. The disturbance strips 25, which are fixedly connected between the stirring strips 17 at the same height, break the stable flow trajectory of the agent, enhance the uniformity of stirring, and allow the agent to fully contact the heat.

[0032] 4. Drying Completion Stage: After drying is complete, turn off the electric dryer 5, circulating fan 18, and stirring motor 15 sequentially through control box 6. Then, restart the lifting motor 9 to make the output shaft of the lifting motor 9 rotate in reverse, driving the lead screw 8 to rotate in reverse, thereby causing the lifting block 10 to move the connecting strip 11 and the box cover 12 upwards to reset. Then, turn off the lifting motor 9. Before discharging, start the lifting motor 9 to raise the box cover 12 to avoid obstructing the discharge. Then, open the sealing structure of the discharge pipe at the bottom of the drying basket 14 to discharge and collect the dried microbial agent through the discharge pipe. After collection, close the sealing structure of the discharge pipe. If there are impurities accumulated inside the discharge port connected to the bottom of the drying box 3, unscrew the sealing cap connected to the threaded bottom of the discharge port, clean the impurities, and then tighten the sealing cap again. Finally, the drying basket 14 can be removed from the inner wall of the threaded ring 13 for cleaning. If the removable filter screen is dirty, it can also be removed for cleaning or replacement to prepare for the next use.

[0033] It should be noted that the electric dryer 5 disclosed above can be of the SRY2 series or JK series, suitable for heating operations within the drying tank 4, featuring high heating efficiency and a wide temperature control range, meeting the precise temperature requirements during the drying process of microbial agents; the lifting motor 9 can be of the 60BYG series or 86BYG series, paired with a corresponding driver, suitable for driving the lead screw 8 to rotate, thereby driving the lifting block 10 and the lid 12 to rise and fall stably, featuring stable speed and high positioning accuracy, ensuring precise docking of the lid 12 and the drying chamber 3; the stirring motor 15 can be of the Y2 series. Alternatively, a YE2 series three-phase asynchronous motor can be used to drive the stirring shaft 16, stirring bars 17, and spiral blades 24 to rotate, fully stirring the microbial agent in the drying basket 14. It features high output torque and stable operation, preventing agent accumulation and uneven drying. The circulating fan 18 can be a DF series or SF series axial flow fan, suitable for accelerating airflow within the drying tank 4, working in conjunction with the electric dryer 5 to achieve uniform heat distribution. It boasts high ventilation efficiency and low noise, and is easy to use with a removable filter. The temperature sensor 19 can be a PT100 platinum resistance temperature sensor. The temperature sensor 21, or DS18B20 digital temperature sensor, is suitable for real-time monitoring of the temperature inside the drying tank 4. It features high measurement accuracy and fast response speed, and can accurately feed back temperature data to the control box 6. The pressure sensor 21 can be an MPX series or SMP series air pressure sensor, suitable for detecting the air pressure inside the drying tank 4. It has the advantages of a wide measurement range and strong stability, providing accurate data for the adjustment of the air pressure balancing valve 22. The air pressure balancing valve 22 can be a QTY series or K23JD series pneumatic balancing valve, suitable for working with the pressure sensor 21 to achieve air pressure balance inside the drying tank 4. The system features flexible opening and closing and good sealing, preventing abnormal air pressure from affecting drying quality. The controller in the control box 6 can use a PLC control module (such as Siemens S7-200SMART or Mitsubishi FX3U series) and a human-machine interface (such as Weintek TK6071IP or Kunlun Tongtai TPC7062Ti) to form a control system, realizing the linkage control of electric dryer 5, lifting motor 9, stirring motor 15, circulating fan 18, temperature sensor 19, pressure sensor 21 and air pressure balance valve 22. The controller controls the operation of each electrical appliance using methods commonly used in existing technology.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dryer for producing microbial inoculants, comprising a trolley (1), characterized in that: A support frame (2) is fixedly connected to the top of the trolley (1), and a drying box (3) is fixedly connected to the top of the support frame (2). A drying trough (4) is opened on the top of the drying box (3). Three electric dryers (5) arranged in a ring are installed inside the drying trough (4). A control box (6) containing a storage battery is fixedly connected to the top of the trolley (1). A support bar (7) is fixedly connected to the top of the control box (6). A lifting groove is opened on the side of the support bar (7) near the drying box (3). A lead screw (8) is rotatably connected to the inside of the lifting groove through a bearing. A lifting motor (9) is fixedly connected to the bottom of the lead screw (8) through a coupling. The lifting motor (9) is fixedly connected to the support bar (7). A lifting block (10) is threadedly connected to the surface of the lead screw (8). The surface of the lowering block (10) is slidably connected to the lifting groove. A connecting strip (11) is fixedly connected to the side of the lifting block (10) near the drying box (3). A box cover (12) is fixedly connected to the bottom of the connecting strip (11), and the box cover (12) is located directly above the drying box (3) and works in conjunction with it. A threaded ring (13) is fixedly connected to the bottom of the box cover (12). A drying basket (14) with a breathable function is threadedly connected to the inner wall of the threaded ring (13). A stirring motor (15) is fixedly connected to the top of the connecting strip (11). A stirring shaft (16) is fixedly connected to the output shaft of the stirring motor (15) through a coupling. A plurality of evenly arranged stirring strips (17) are fixedly connected to the bottom of the stirring shaft (16), and the stirring strips (17) are located inside the drying basket (14).

2. The dryer for producing microbial inoculants according to claim 1, characterized in that: The bottom of the drying box (3) is provided with an installation port, which is connected to the drying trough (4). A circulating fan (18) is installed inside the installation port, and the circulating fan (18) is used in conjunction with the electric dryer (5).

3. The dryer for producing microbial agents according to claim 1, characterized in that: The drying oven (3) is equipped with a temperature sensor (19) on its inner wall, and the temperature sensor (19) is electrically connected to the control box (6). The top of the oven cover (12) is fixedly connected to a temperature display (20), and the temperature display (20) is used in conjunction with the temperature sensor (19).

4. A dryer for producing microbial inoculants according to claim 1, characterized in that: The inner wall of the drying box (3) is provided with a pressure sensor (21), and the pressure sensor (21) is electrically connected to the control box (6). The top of the box cover (12) is fixedly connected with a pressure balance valve (22), and the pressure balance valve (22) is used in conjunction with the pressure sensor (21).

5. A dryer for producing microbial inoculants according to claim 1, characterized in that: The surface of the support bar (7) is symmetrically provided with a limiting groove about the lifting groove, and the surface of the connecting bar (11) is symmetrically fixedly connected with a limiting block (23) about the lifting block (10), and the limiting block (23) is slidably connected with the limiting groove.

6. A dryer for producing microbial inoculants according to claim 1, characterized in that: Spiral blades (24) are fixedly connected to the surface of the stirring shaft (16), and disturbance strips (25) are fixedly connected between the stirring strips (17) at the same height.

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