CN117158600A - High-efficiency wolfberry drying system and control method for drying wolfberry - Google Patents

Abstract

The invention discloses a medlar high-efficiency drying system and a control method for drying medlar, which can improve the drying efficiency and the drying quality of medlar in an integrated drying room and obtain medlar dried with lower water content and uniform drying. The system comprises a drying room, a feeding component, a hot air ventilation component and a moisture removal ventilation component, wherein a drying tunnel is arranged in the drying room, a plurality of hot air ventilation components and the moisture removal ventilation components are sequentially arranged at intervals along the drying tunnel, the feeding component carries medlar to pass through the drying tunnel, and the hot air ventilation component is used for blowing convection hot air to two sides of the medlar to heat and dry and gradually increasing the temperature at two sides of the drying tunnel; the moisture removal and ventilation assembly automatically removes moisture to keep the drying room relatively dry.

Description

An efficient drying system for wolfberry and its control method for drying wolfberry

Technical field

The invention belongs to the technical field of wolfberry processing, and in particular relates to an efficient wolfberry drying system and a control method for drying wolfberry.

Background technique

Wolfberry has gradually become known to consumers due to its high nutritional value and medicinal value. Before being made into various products, the picked fresh wolfberry needs to undergo a dehydration and drying process to make dried fruit with a lower water content, so as to improve the color, appearance and texture of the wolfberry, and at the same time make the wolfberry easier to preserve and store. According to wolfberry drying experiments, it is known that the closer the water is to the center of the wolfberry, the slower it evaporates when heated, and the higher the drying temperature required. However, if the surface of wolfberry is continuously dried at high temperature for a long time, it is easy to produce a "hard shell phenomenon" , causing the internal moisture to be difficult to evaporate from the epidermis.

In the existing technology, an integrated drying room is used to dry fresh wolfberry fruit. When the wolfberry enters the drying room, the heated air is introduced into the drying room through a fan, and the heat is transferred to the wolfberry from front to back. Since the maximum temperature of the integrated drying room is fixed during a drying process, and the temperature of the hot air gradually attenuates during the transfer process, it is easy to cause the wolfberry close to the heat source to be dried first, while the wolfberry far away from the heat source needs to be switched in again due to uneven heating. The drying room is placed close to the heat source for drying, which increases the probability of "hard shelling" of wolfberry. When drying large quantities of wolfberry, it will seriously affect the drying efficiency and drying quality.

Contents of the invention

Based on the above background technology needs, the present invention discloses an efficient drying system for wolfberry and a control method for drying wolfberry, which can improve the drying efficiency and drying quality of wolfberry in an integrated drying room, resulting in lower moisture content and uniform drying. Dried wolfberry.

In order to achieve the above objects, the technical solution of the present invention is:

An efficient drying system for wolfberry, including a drying room, a feeding component, a hot air ventilation component and a moisture removal ventilation component. A drying channel is provided between the inlet and outlet of the drying room. The feeding component includes Guide rails and feeding trucks, the guide rails are arranged on both sides of the drying tunnel, the feeding trucks can carry wolfberry through the drying tunnel along the guide rails; there are several hot air ventilation components and moisture exhaust ventilation components. group, and are arranged along the drying tunnel in sequence; the hot air ventilation assembly includes a hot air generating device, a hot air outlet window and a temperature controller, the hot air outlet windows are symmetrically arranged on both sides of the drying tunnel, and the A cooling gap is formed between adjacent hot air outlet windows along the drying tunnel; the hot air generating device is connected to the hot air outlet window pipe, and the temperature controller is electrically connected to the hot air generating device respectively, so The temperature controller is used to control the outlet air temperature of the hot air generating device; the moisture removal ventilation component includes a moisture removal fan, a moisture removal window and a humidity controller. The moisture removal window is arranged on the top of the drying room and is connected with the drying room. The moisture removal fan is connected with a pipeline, the air outlet of the moisture removal fan is connected to the outside of the drying room, and the moisture removal fan is electrically connected to the humidity controller.

Preferably, one side of the hot air outlet window is provided with air outlets in a matrix pattern.

Preferably, the feeding vehicle is provided with a material rack, and hollow material trays are stacked on the material rack relative to the air outlet along the direction of gravity.

Preferably, the hollow material trays are arranged in a Z-shape along the direction of gravity.

Preferably, the number of the drying tunnels is at least two groups, and the drying tunnels are arranged in parallel in the drying room.

Preferably, the temperature controller is electrically connected to the moisture removal fan, and when the temperature controller is in the first state and/or the humidity controller is in the first state, the moisture removal fan is started.

Preferably, the feeding assembly further includes a motor, a transmission chain and a drive controller. The transmission chain is rotatably connected to the drive shaft of the motor along the guide rail, and one end of the transmission chain is detachable from the feeding car. connection, the drive controller is electrically connected to the motor, and the drive controller is used to control the moving speed, start and stop of the feeding vehicle.

Preferably, the hot air outlet window and the moisture drainage window are connected through a pipeline, and an electric valve is provided in the pipeline for connecting the hot air outlet window and the moisture drainage window, and the electric valve is connected to the moisture drainage window. The humidity controller is electrically connected, and when the humidity controller is in the second state, the electric valve is opened.

A control method for drying wolfberry in a high-efficiency wolfberry drying system, based on the wolfberry drying system as described in any one of claims 1 to 8, characterized in that it includes the following steps:

a. Set the outlet air temperature of each group of hot air generating devices step by step along the feeding direction in order of temperature from low to high, so that several temperature zones with different temperatures are formed from the front to the back of the drying tunnel, and the humidity values along the feeding direction are Set the exhaust humidity value of each humidifier fan step by step from high to low to control the humidity range of each temperature zone.

b. Close the inlet and outlet of the drying room, start each hot air generating device in sequence along the feeding direction, and preheat the drying room so that each temperature zone in the drying room basically reaches the corresponding hot air generation level. The device’s outlet air temperature setting value;

c. Open the feed inlet of the drying room, enter a feed truck carrying wolfberry, and then close the feed inlet of the drying room again. Set the total time for the feed truck to enter the drying room and close the feed inlet of the drying room again. More than 2 minutes;

d. Control the feeding truck to move along the guide rail toward the outlet of the drying room, and set the feeding truck to stay between any pair of hot air outlet windows and between any pair of cooling gaps for no less than 35 minutes;

e. Every 35 minutes, repeat steps c and d in sequence until the drying tunnel is occupied by the feeding truck.

By adopting the above technical solutions, compared with the prior art, the present invention at least has the following beneficial effects:

The feeding truck carries the wolfberry through the drying room, and the wolfberry repeatedly undergoes two steps of high-temperature drying and cooling and dehumidification while passing through the hot air outlet window and the cooling gap, and finally obtains a lower moisture content and even drying. Wolfberry drying; the temperature in the drying tunnel is adjusted step by step by each of the temperature controllers, the humidity controller controls the moisture removal fan to automatically remove moisture, and the feeding component automatically controls the feeding, improving the processing of wolfberry dry efficiency.

Description of drawings

Figure 1 is a schematic front structural view of an efficient wolfberry drying system in one embodiment.

Figure 2 is a side partial cross-sectional view of the high-efficiency wolfberry drying system in the embodiment.

Figure 3 is a partial schematic diagram of the high-efficiency wolfberry drying system in the embodiment.

Figure 4 is a partial schematic diagram of the feeding assembly in the embodiment.

Figure 5 is a partial schematic diagram of the moisture removal and ventilation assembly in the embodiment.

In the picture: drying room 10, drying tunnel 11, cooling gap 12, feeding assembly 20, guide rail 21, feeding car 22, material rack 221, hollow material tray 222, motor 23, transmission chain 24, drive controller 25, hot air ventilation Component 30, hot air generating device 31, hot air outlet window 32, air outlet 321, temperature controller 33, heating pipe 34, moisture exhaust ventilation component 40, moisture exhaust fan 41, moisture exhaust window 42, humidity controller 43, exhaust Wet pipe 44, electric valve 441.

Detailed ways

It should be noted that, as long as there is no conflict, the embodiments and features in the embodiments of the present invention can be combined with each other. The technical solutions of the present invention will be further described below with reference to the accompanying drawings of embodiments of the present invention. The present invention is not limited to the following specific implementations.

It should be understood that the same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components. In the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "inner", "outer", "left", "right", "front", "back", "top", "bottom" etc. indicating the direction or The positional relationship is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the structure or component referred to must have a specific orientation, be constructed and operated in a specific orientation, Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limitations of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

The present invention will be further described in detail below with reference to the accompanying drawings 1-5 and specific embodiments.

This embodiment discloses a high-efficiency drying system for wolfberry, which can improve the drying efficiency and drying quality of wolfberry in an integrated drying room.

In one embodiment, as shown in Figure 1, a high-efficiency wolfberry drying system includes a drying room 10, a feeding assembly 20, a hot air ventilation assembly 30 and a moisture exhaust ventilation assembly 40. There is a drying channel 11 between the material openings. The feeding assembly 20 includes a guide rail 21 and a feeding cart 22. The guide rail 21 is laid from the feeding opening to the discharging opening and is located on both sides of the drying tunnel 11. The feeding cart 22 can carry wolfberry. Pass through the drying tunnel 11 along the guide rail 21; there are seven hot air ventilation components 30 and dehumidification ventilation components 40, and they are arranged sequentially along the drying tunnel 11; the hot air ventilation component 30 includes a hot air generating device 31, a hot air outlet window 32 and a temperature sensor. Controller 33, in which the hot air outlet windows 32 are symmetrically arranged on both sides of the drying tunnel 11, and a cooling gap 12 is formed between two adjacent hot air outlet windows 32 along the drying tunnel 11, and the air outlet of the hot air generating device 31 passes through The heating pipe 34 for ventilation is connected to the hot air outlet window 32, and the temperature controller 33 is electrically connected to the hot air generating device 31. The temperature controller 33 can control the hot air generating device 31 to blow out the air through the temperature feedback of the corresponding area in the drying room 10. The hot air is used for temperature regulation; the moisture removal ventilation component 40 includes a moisture removal fan 41, a moisture removal window 42 and a humidity controller 43. As shown in Figure 2, the moisture removal window 42 is set on the top of the drying room 10, and the moisture removal fan 41 It is arranged outside the drying room 10 and its air outlet is connected to the external atmosphere. The moisture removal window 42 is connected to the moisture removal fan 41 through the moisture removal pipe 44 for ventilation. The moisture removal fan 41 is electrically connected to the humidity controller 43, and the humidity is controlled. The device 43 can control the moisture exhaust fan 41 to discharge the hot and humid gas in the drying room 10 through the humidity feedback of the corresponding area in the drying room 10 .

Specifically, the drying room 10 is composed of a tunnel-shaped outer frame and doors (not shown in the drawings) provided at both ends of the outer frame. The above-mentioned outer frame and doors are made of heat-insulating materials; the above-mentioned hot air generating device 31 is The electric hot air stove or the fuel hot air stove can provide high-temperature hot air under the wolfberry drying standards; the symmetrically arranged hot air outlet windows 32 are used to form a convection hot air curtain to heat the wolfberry passing through the air curtain; the temperature controller 33 is It integrates components such as a temperature sensor, a single-chip microcomputer, and a power supply. The temperature sensor is located on the corresponding side of the hot air outlet window 32. It senses the temperature in the area and feeds it back to the single-chip microcomputer. The single-chip computer then controls the heating or cooling of the hot air generating device 31. In order to achieve the set temperature value of the corresponding area; the humidity controller 43 is integrated with components such as a humidity sensor, a single-chip microcomputer, and a power supply, and controls the dehumidification fan 41 to perform dehumidification operations based on a working principle similar to that of the temperature sensor 33.

When using the above-mentioned high-efficiency wolfberry drying system, the wolfberry is sent into the drying room 10 through the feeding truck 22. When the feeding truck 22 reaches the first parking space (the first pair of hot air outlet windows 32 adjacent to the inlet of the drying room 10 corresponds to area), close the door of the inlet of the drying room 10, and the hot air outlet window 32 of the first parking space blows hot air to the wolfberry on the feeding truck 22 for drying. The opposite sides of the wolfberry are heated at the same time, which can increase the moisture. evaporation rate to avoid uneven drying caused by uneven heating; after the heating of the first parking space is completed, start the material truck and continue to move forward, and reach the cooling gap 12 between the first pair of hot air outlet windows 32 and the second pair of hot air outlet windows 32 In the corresponding area, the wolfberry is allowed to stay in this area for a period of time, and the moisture removal fan 41 is turned on at the same time. The temperature of the wolfberry decreases in the cooling gap 12, and the moisture inside the wolfberry migrates to the epidermis. After that, the feeding truck 22 is started to enter the second parking space ( The area corresponding to the second pair of hot air outlet windows 32 after the inlet of the drying room 10), and repeat the above drying and cooling process until the moisture in the wolfberry reaches the drying standard. The first cart of wolfberries only needs to pass through the drying room 10 along the guide rail 21 to complete the drying. This avoids the situation of repeatedly entering the drying room 10 due to uneven heating, and improves drying efficiency and quality. In addition, when the first car of wolfberries leaves the first parking space, the inlet door of the drying room 10 can be quickly opened and the second car of wolfberries can be sent to the first parking space for drying. According to the set position of the hot air outlet window 32 Feeding the corresponding number of feeding trucks 22 into the drying room 10 in sequence can fully utilize the space of the drying room 10 and increase the number of dried wolfberries.

Further, as shown in Figure 2, in this embodiment, as one of the preferred solutions, the hot air outlet window 32 is provided with air outlets 321 in a matrix on the opposite side, which can guide the hot air to form an air curtain and quickly heat up the wolfberry. Prevent the gas used for heating from dispersing prematurely and prevent the wolfberry near the middle on the feeding car 22 from drying slower than the wolfberry on both sides.

Further, in this embodiment, as shown in Figures 3 and 4, the feeding truck 22 is provided with a material rack 221. The material rack 221 is composed of a number of transverse beams and longitudinal beams. A number of materials are stacked on the material rack 221 at intervals along the direction of gravity. The hollowed out material tray 222 and placing the wolfberry on the hollowed out material tray 222 can further increase the number of one-time dried wolfberry in the system.

Further, in this embodiment, as shown in FIG. 4 , the hollow material trays 222 are arranged in a Z-shape along the direction of gravity. This arrangement can reflect the hot air blowing sideways from the hollow material tray 222 downward to avoid the hot air from being blown away. Premature upward diffusion causes uneven heating of wolfberries near the lower layer.

Furthermore, in this embodiment, as shown in FIG. 1 , the number of drying tunnels 11 is set into two groups, and the two sets of drying tunnels 11 are arranged in parallel in the drying room 10 .

Specifically, hot air outlet windows 32 are arranged side by side in the two groups of drying tunnels 11 , and the two pairs of hot air outlet windows 32 are connected through the heating pipe 34 . Based on this, the high-efficiency wolfberry drying system can put two trucks of wolfberry in parallel for drying at the same time, further improving the amount and drying efficiency of one-time dried wolfberry.

Further, in this embodiment, the temperature controller 33 is electrically connected to the moisture exhaust fan 41. When the temperature controller 33 is in the first state (that is, the temperature sensor of the temperature controller 33 senses that the temperature of the corresponding area reaches the set value) After setting the value) and/or when the humidity controller 43 is in the first state (that is, after the humidity sensor of the humidity controller 43 senses that the humidity in the corresponding area reaches the set value), the moisture removal fan 41 is started. Since different areas in the drying room 10 need to be set to different temperatures (temperatures increase step by step) during the drying process, the high-temperature area will perform thermal compensation on the low-temperature area, causing the temperature of the low-temperature area to be higher than the set value. Through the above settings, the moisture exhaust fan 41 is turned on after the temperature or humidity in the corresponding area reaches the set value, which can discharge excess hot air in time and prevent the temperature of the corresponding area from being too high.

Further, in this embodiment, as shown in Figure 4, the feeding assembly 20 also includes a motor 23, a transmission chain 24 and a drive controller 25. The transmission chain 24 is rotatably installed on the motor 23 along the guide rail 21 through gear meshing. on the drive shaft, and one end of the transmission chain 24 can be detachably connected to the lower part of the feeding truck 22 by setting a hook or buckle; the drive controller 25 is electrically connected to the motor 23.

Specifically, the drive controller 25 can integrate various electronic components to have timing switch and speed change functions. Through the drive controller 25, the start, stop and speed of the motor 23 can be automatically controlled, so that the motor 23 drives the feeding truck through the transmission chain 24. 22 passes through the drying room 10 according to the set time, so that the wolfberry on the feeding truck 22 is dried sequentially. The above embodiment can improve the feeding efficiency and greatly improve the operational convenience of the efficient wolfberry drying system.

Further, in this embodiment, as shown in Figure 5, the moisture discharge window 42 at the rear end of the drying room 10 is connected to the hot air outlet window 32 at the front end of the drying room 10 through a pipeline, and the hot air outlet window 32 and An electric valve 441 is provided in the pipe of the moisture discharge window 42. The electric valve 441 is electrically connected to the humidity controller 43. When the humidity controller 43 is in the second state (that is, the humidity controller 43 detects the hot air in the corresponding area in the drying room 10 When the humidity is lower than the emission set value), the electric valve 441 opens.

Specifically, a circulation fan can be provided in the pipe connecting the hot air outlet window 32 and the moisture discharge window 42 between the electric valve 441 and the heating pipe 34 , and the circulation fan is electrically connected to the electric valve 441 . Since the hot air temperature in the area near the rear end of the drying tunnel 11 is higher than the hot air temperature in the front end, and the hot air humidity is lower, when the door of the inlet of the drying room 10 is opened, the temperature in the front end area of the drying tunnel 11 decreases. , open the electric valve 441 and the circulation fan, circulate the hot air whose humidity is lower than the emission value in the rear area of the drying room 10 into the heating pipe 34 in the front area of the drying room 10, and compensate the temperature in the front area to a certain extent. Reduce energy consumption and reduce waste of heat energy.

Through the above implementation, the efficient wolfberry drying system in the embodiment can achieve at least the following technical effects: the feeding truck 22 carries the wolfberry through the drying room 10 , and the wolfberry repeatedly undergoes high-temperature drying while passing through the hot air outlet window 32 and the cooling gap 12 and cooling and dehumidification, to finally obtain dried wolfberry with lower moisture content and even drying; the temperature in the drying tunnel 11 is adjusted step by step by each temperature controller 33, and the humidity controller 43 controls the dehumidification fan 41 to automatically dehumidify. Moreover, the feeding component 20 automatically controls the feeding, which improves the efficiency of drying wolfberry.

The invention also discloses a control method for drying wolfberry in a high-efficiency wolfberry drying system. Based on the above embodiment, it includes the following steps:

1. Set the outlet temperatures of each group of hot air generating devices 31 in sequence along the feeding direction: the first group is 43°-53°, the second group is 49°-55°, the third group is 51°-57°, and the fourth group is 51°-57°. The first group is 56°～62°, the fifth group is 56°～65°, the sixth group is 58°～66°, and the seventh group is 60°～68°, so that the drying tunnel 11 is divided into 7 temperature zones with different temperatures from front to back. And the exhaust humidity values of each row of humidifiers 41 are sequentially set along the feeding direction: the first group＜40%, the second group＜35%, the third group＜30%, the fourth group＜30%, the fifth group Group ＜20%, Group 6＜15%, Group 7＜10% (see Table 1 for details);

Drying room temperature and humidity parameter table

drying room 1 temperature zone 2 temperature zones 3 temperature zones 4 temperature zones 5 temperature zones 6 temperature zones 7 temperature zones Temperature, ℃ 43～53 49～55 51～57 56～62 56～65 58～66 60～68 humidity,% <40% <35% <30% <30% <20% <15% <10%

Table 1

2. Close the inlet and outlet of the drying room 10, start each hot air generating device 31 sequentially along the feeding direction, preheat the drying room 10, and make the air out of each hot air outlet window 32 in the drying room 10. The temperature basically reaches the outlet air temperature setting value of each hot air generating device 31 connected thereto;

3. Open the feed inlet of the drying room 10, enter a feed truck 22 containing wolfberry, then close the feed inlet of the drying room 10 again, set the feed truck 22 to enter the drying room 10 and close the inlet of the drying room 10 again. The total time of the material opening does not exceed 2 minutes;

4. Control the feeding truck 22 to move along the guide rail 21 toward the discharge port of the drying room 10, and set the time that the feeding truck 22 stays between any pair of hot air outlet windows 32 and between any pair of cooling gaps 12. Less than 35 minutes;

5. Repeat steps c and d every 35 minutes until the drying tunnel 11 is occupied by the feeding truck 22, and then the feeding truck 22 is output in sequence.

According to the above control method, up to 28 cars of wolfberry can be heated and dehumidified in each temperature zone for at least 16.3 hours (see the above specific implementation for details of the heating and dehumidification process), and finally dry and uniform, with a moisture content of less than 13 % dried wolfberry.

Obviously, the above-mentioned embodiments of the present invention are only examples to clearly illustrate the present invention, and are not intended to limit the implementation of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively enumerate all implementations. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (9)

1. A high-efficiency drying system for wolfberry, characterized in that it includes a drying room, a feeding component, a hot air ventilation component and a moisture removal ventilation component, and a drying tunnel is provided between the inlet and the outlet of the drying room. The feeding assembly includes guide rails and a feeding cart. The guide rails are arranged on both sides of the drying tunnel. The feeding cart can carry wolfberry through the drying tunnel along the guide rails; the hot air ventilation assembly and the moisture removal assembly There are several groups of ventilation components, and they are arranged sequentially along the drying tunnel; the hot air ventilation components include a hot air generating device, a hot air outlet window and a temperature controller, and the hot air outlet windows are symmetrically arranged in the drying tunnel. On both sides, a cooling gap is formed along the drying tunnel between the adjacent hot air outlet windows; the hot air generating device is connected to the hot air outlet window pipe, and the temperature controller is respectively connected to the hot air generating device. The device is electrically connected, and the temperature controller is used to control the air outlet temperature of the hot air generating device; the moisture removal ventilation component includes a moisture removal fan, a moisture removal window and a humidity controller, and the moisture removal window is provided on the The top of the drying room is connected to the moisture exhaust fan pipe, the air outlet of the moisture exhaust fan is connected to the outside of the drying room, and the moisture exhaust fan is electrically connected to the humidity controller. 2. A high-efficiency wolfberry drying system according to claim 1, characterized in that air outlets are arranged in a matrix on one side of the hot air outlet window. 3. A high-efficiency wolfberry drying system according to claim 2, characterized in that the feeding vehicle is provided with a material rack, and hollow material trays are stacked on the material rack along the direction of gravity relative to the air outlet. . 4. A high-efficiency wolfberry drying system according to claim 3, characterized in that the hollow material trays are arranged in a Z-shape along the direction of gravity. 5. A high-efficiency wolfberry drying system according to claim 1, characterized in that the number of the drying tunnels is at least two groups, and the drying tunnels are arranged in parallel in the drying room. 6. A high-efficiency wolfberry drying system according to claim 1, characterized in that the temperature controller is electrically connected to the moisture exhaust fan, and when the temperature controller is in the first state and/or When the humidity controller is in the first state, the moisture exhaust fan is started. 7. A high-efficiency wolfberry drying system according to claim 1, characterized in that the feeding assembly further includes a motor, a transmission chain and a drive controller, and the transmission chain is connected to the motor along the guide rail. The drive shaft is rotatably connected, one end of the transmission chain is detachably connected to the feeding car, the drive controller is electrically connected to the motor, and the drive controller is used to control the moving speed, start and start of the feeding car. stop. 8. A high-efficiency wolfberry drying system according to claim 1, characterized in that the hot air outlet window and the moisture discharge window are connected through a pipeline, and are used to connect the hot air outlet window and the An electric valve is provided in the pipe of the moisture discharge window. The electric valve is electrically connected to the humidity controller. When the humidity controller is in the second state, the electric valve is opened. 9. A control method for drying wolfberry in a high-efficiency wolfberry drying system, based on the wolfberry drying system according to any one of claims 1 to 8, characterized in that it includes the following steps: a. Set the outlet air temperature of each group of hot air generating devices step by step along the feeding direction in the order of temperature value from low to high, and set the exhaust temperature of each row of wet fans in the order of humidity value from high to low along the feeding direction. Wind humidity value; b. Close the inlet and outlet of the drying room, start each hot air generating device in sequence along the feeding direction, and preheat the drying room so that the air temperature of each hot air outlet in the drying room is basically reached. The outlet air temperature setting value of each hot air generating device; c. Open the feed inlet of the drying room, enter a feed truck carrying wolfberry, and then close the feed inlet of the drying room again. Set the total time for the feed truck to enter the drying room and close the feed inlet of the drying room again. More than 2 minutes; d. Control the feeding truck to move along the guide rail toward the outlet of the drying room, and set the feeding truck to stay between any pair of hot air outlet windows and between any pair of cooling gaps for no less than 35 minutes; e. Every 35 minutes, repeat steps c and d in sequence until the drying tunnel is occupied by the feeding truck.