Hot air circulation type drying equipment with air uniformizing plate structure

Abstract

The invention provides hot air circulation type drying equipment with an air uniformizing plate structure, and relates to the field of drying equipment, the hot air circulation type drying equipment comprises a drying chamber and a hot air circulation system, and further comprises an air uniformizing plate system which is arranged above a material area in the drying chamber and comprises an air uniformizing plate body, a lifting executing mechanism and an angle executing mechanism; the air uniformizing plate body comprises an inclined flow guide section and a horizontal blocking section which are connected; the lifting executing mechanism is connected with the top of the drying chamber and can drive the air uniformizing plate to lift; the angle executing mechanism adjusts the angle of the inclined flow guide section through a connecting rod and a linear driver; and the auxiliary flow guide system is arranged at the downstream of the air uniformizing plate system and comprises an air distribution cavity with a plurality of air outlet holes and an internal flow guide rib plate. The air flow is optimized through the air uniformizing plate with the adjustable height and angle, and the drying dead angle is eliminated; the auxiliary flow guide system realizes fine air flow control; hot air circulation and fresh air adjustment cooperate to improve energy efficiency and adaptability; and the dustproof sealing design ensures the long-term stable operation of the equipment.

Description

Technical Field

[0001] This invention relates to the field of drying equipment, and more particularly to a hot air circulating drying equipment with a uniform air distribution plate structure. Background Technology

[0002] Hot air drying is a key process widely used in industrial production for material dehydration, solidification, and heat treatment. Its drying uniformity and energy efficiency directly affect product quality and production costs. In hot air circulating drying equipment, the uniformity of airflow organization and temperature field determines the stability of the drying effect. Due to the diverse properties of materials and the susceptibility of airflow within the drying chamber to structural influences that can generate eddies or dead zones, the equipment must possess highly efficient airflow homogenization capabilities and adaptive adjustment functions.

[0003] Traditional hot air circulating dryers often suffer from limitations such as uneven airflow distribution, localized overheating, or insufficient drying. Their air supply structure is typically fixed, making it difficult to dynamically adjust airflow direction and speed for different materials or drying stages, resulting in poor drying uniformity. Simultaneously, the hot air circulation path may not be fully optimized, leading to inefficient return airflow organization and impacting overall energy efficiency. Furthermore, the lack of effective airflow guiding and equalization devices within the drying chamber makes airflow prone to short-circuiting or deviation, resulting in uneven heating of materials and prolonged drying cycles. Adjustments during operation rely heavily on manual operation, with limited automation, increasing the complexity of process control. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a hot air circulating drying device with a uniform air distribution plate structure, which addresses the above-mentioned defects in the prior art.

[0005] In order to overcome the above-mentioned defects of the prior art, embodiments of the present invention provide a hot air circulation drying device with an air distribution plate structure to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A hot air circulating drying device with an air distribution plate structure includes: a drying chamber and a hot air circulation system disposed in the drying chamber, characterized in that it further includes: An air distribution plate system is provided in the drying chamber and located above the area of ​​the material to be dried; The air distribution plate system includes an air distribution plate body, a lifting actuator, and an angle actuator. The wind distribution plate body includes an inclined guide section and a horizontal blocking section that are connected to each other. The lifting actuator includes a fixed base connected to the top of the drying chamber and a lifting drive component movably connected to the fixed base; The angle actuator includes a link hinged to the back of the inclined guide section and a linear actuator that drives the link. An auxiliary airflow guiding system is provided in the drying chamber and located downstream of the air distribution plate system; The auxiliary airflow guiding system includes an air distribution chamber and a guide rib. The wall of the air distribution chamber has multiple air outlet holes, and the guide rib is located inside the air distribution chamber.

[0007] Preferably, the lifting actuator further includes a guide assembly and a boom; The guiding component includes a guide post disposed on the fixed base and a guide sleeve disposed on the movable end of the lifting drive component; The upper end of the boom is connected to the output end of the lifting drive component, and the lower end is connected to the body of the wind distribution plate.

[0008] Preferably, the lifting actuator further includes a synchronous shaft and a position sensor; The synchronous shaft is located between adjacent lifting drive components; The position sensor is mounted on the fixed base.

[0009] Preferably, the angle actuator further includes a mounting base and a dust cover; The mounting base is located at the top of the drying chamber, and one end of the linear drive is connected to the mounting base; The dust cover is installed outside the linear drive.

[0010] Preferably, the auxiliary airflow guiding system further includes an air distribution baffle and an airflow sensor; The air distribution baffle is located inside the air distribution cavity to divide its interior into multiple sub-air ducts; The airflow sensor is located on the air outlet surface of the air distribution chamber.

[0011] Preferably, the hot air circulation system includes a circulating fan, a heater, and a circulating air duct; The circulating air duct is connected to the air outlet and air inlet of the drying chamber; The circulating fan and the heater are located in the circulating air duct.

[0012] Preferably, the hot air circulation system further includes a fresh air conditioning unit, which includes a fresh air intake and an exhaust gas outlet; The fresh air intake and the exhaust gas outlet are respectively connected to the circulating air duct.

[0013] Preferably, the drying chamber is provided with a flow equalization plate and a support frame for supporting the flow equalization plate and a buckle for fixing the flow equalization plate to the support frame below the area of ​​the material to be dried.

[0014] Preferably, a return air cavity is formed below the flow equalization plate, a return air inlet is provided on the side wall of the return air cavity, a flow guide slope is provided at the bottom of the return air cavity, and an inspection port is provided at the end of the return air cavity.

[0015] Preferably, the side wall of the drying chamber is provided with an observation window, an inspection door, a thermometer installed in the observation window, and a sealing strip installed around the inspection door.

[0016] The present invention adopts the above technical solution and has the following technical effects compared with the prior art: 1. Achieve dynamic and uniform drying: The air distribution plate, which can be independently adjusted in height and angle, can dynamically optimize the airflow distribution, effectively eliminate drying dead zones, ensure uniform heating of materials, and improve drying quality.

[0017] 2. Achieve precise airflow control: By combining the sorting and segmentation of the auxiliary airflow guiding system with sensor feedback, the airflow in each area of ​​the drying chamber can be precisely controlled to form a stable and uniform three-dimensional drying environment.

[0018] 3. Improve system energy efficiency and adaptability: The combination of efficient hot air circulation and controllable fresh air conditioning can optimize energy consumption while ensuring drying effect and adapt to the drying process requirements of different materials.

[0019] 4. Improved automation and ease of maintenance: Key mechanisms adopt automatic drive and sensor control, reducing manual intervention; multiple convenient maintenance designs make equipment maintenance and cleaning operations simpler.

[0020] 5. Enhanced equipment reliability: Key moving parts are equipped with dust protection, and all openings are effectively sealed, ensuring the airtightness and stability of the equipment during long-term operation and extending its service life. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of a hot air circulating drying device with a uniform air distribution plate structure according to the present invention; Figure 2 This is a schematic diagram of the interior of a hot air circulating drying device with a uniform air distribution plate structure according to the present invention. Figure 3 This is a schematic diagram of the lifting actuator of a hot air circulating drying device with a uniform air distribution plate structure according to the present invention; Figure 4 This is a schematic diagram of the air distribution plate body and the angle actuator of a hot air circulating drying device with an air distribution plate structure according to the present invention. Figure 5 This is a schematic diagram of the air distribution plate body of a hot air circulating drying device with an air distribution plate structure according to the present invention. Figure 6 This is a schematic diagram of the air distribution cavity of a hot air circulating drying device with an air distribution plate structure according to the present invention; Figure 7 This is a schematic diagram of the air outlet of a hot air circulating drying device with an air distribution plate structure according to the present invention. Figure 8 This is a schematic diagram of the flow equalization plate and support frame of a hot air circulating drying device with a flow equalization plate structure according to the present invention. Figure 9 This is a schematic diagram of the buckle of a hot air circulating drying device with a uniform air distribution plate structure according to the present invention.

[0022] The attached figures are labeled as follows: 1. Drying chamber; 101. Air distribution plate; 102. Support frame; 103. Buckle; 104. Return air chamber; 105. Return air outlet; 106. Guide ramp; 107. Inspection port; 108. Observation window; 109. Inspection door; 110. Thermometer; 111. Sealing strip; 2. Hot air circulation system; 201. Circulating fan; 202. Heater; 203. Circulating air duct; 204. Fresh air conditioning unit; 2041. Fresh air intake; 2042. Exhaust gas outlet; 3. Air distribution plate system; 301. Air distribution plate body; 3011. Inclined guide section; 301 2. Horizontal blocking section; 302. Lifting actuator; 3021. Fixed base; 3022. Lifting drive component; 3023. Guide assembly; 30231. Guide column; 30232. Guide sleeve; 3024. Hoist; 3025. Synchronous shaft; 3026. Position sensor; 303. Angle actuator; 3031. Connecting rod; 3032. Linear actuator; 3033. Mounting base; 3034. Dust cover; 4. Auxiliary air guiding system; 401. Air distribution chamber; 4011. Air outlet; 402. Air guiding rib; 403. Air distribution baffle; 404. Airflow sensor; 405. Sub-air duct. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] 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.

[0025] Example 1

[0026] As attached Figures 1 to 9The hot air circulation drying equipment shown has a uniform air distribution plate structure. The side wall of the drying chamber 1 has a rectangular through hole for installing an observation window 108. The observation window 108 is made of double-layer heat-resistant glass. The temperature sensing sleeve of the thermometer 110 extends into the interior of the drying chamber 1 through a special mounting hole in the observation window 108, and its dial is fixed on the outside of the window frame for easy reading. The maintenance door 109 is installed on the side opening of the drying chamber 1 by a heavy-duty hinge. The inner side of the frame of the maintenance door 109 is machined with an annular groove. The sealing strip 111 is pressed into the groove by an interference fit. When the maintenance door 109 is closed and a tightening force is applied by locking the handle, the sealing strip 111 is squeezed and deformed to fill the gap between the door and the door frame. A support frame 102 is fixed to the bottom surface of the drying chamber 1. The support frame 102 is made of profiles welded into a grid to provide uniform support. A flow equalization plate 101 is laid flat on top of the support frame 102. The edge of the flow equalization plate 101 has a slot or clearance hole that matches the buckle 103. The base of the buckle 103 is fixed to the side beam of the support frame 102. Its movable pressure arm can rotate or elastically press down to hook or press the edge of the flow equalization plate 101 to achieve quick fixation. The space enclosed by the flow equalization plate 101 and the inner wall of the drying chamber 1 forms a return air cavity 104. A return air outlet 105 is opened on the lower part of one side wall of the return air cavity 104 and is connected to the circulating air duct 203 through a pipe. A guide ramp 106 slopes from the other side of the bottom of the return air cavity 104 toward the side where the return air outlet 105 is located. Its surface is smooth to guide the condensate and airflow to converge. An inspection port 107 is opened at the end of the return air cavity 104 and is equipped with a cover plate with a handle.

[0027] In the hot air circulation system 2, the circulation duct 203 is made of insulation board splicing. Its air inlet end is connected to the return air port 105 of the drying chamber 1, and its air outlet end leads to the air inlet area of ​​the drying chamber 1. The circulation fan 201 is installed on the straight section of the circulation duct 203, and its motor shaft drives the centrifugal impeller to rotate through the coupling. The heater 202 is set in the air duct 203 on the air outlet side of the circulation fan 201, and its heating tube or electric heating wire is fixed in the center of the air duct by the bracket. The fresh air inlet 2041 of the fresh air conditioning unit 204 is located on the intake side of the circulating air duct 203 near the air intake side of the circulating fan 201, and the exhaust outlet 2042 is located on the return air side of the circulating air duct 203 near the air return side of the drying chamber 1. Both are equipped with adjustable air valves. The valve plates are driven to rotate by a small motor. When the drying medium needs to be replaced, the control system commands the air valve of the fresh air inlet 2041 to open at a certain angle. At the same time, the air valve of the exhaust outlet 2042 also opens in coordination, so that outside air is drawn in and some humid exhaust gas is discharged.

[0028] In the air distribution plate system 3, the inclined guide section 3011 and the horizontal blocking section 3012 of the air distribution plate body 301 are welded together to form a folded plate structure. Multiple sets of lifting actuators 302 can be set. The fixed seat 3021 is fixed to the top frame of the drying chamber 1 by bolts. The cylinder of the lifting drive component 3022 is hinged to the fixed seat 3021. The end of its push rod is connected to the upper end of the hanger 3024 through a universal joint. The lower end of the hanger 3024 is hinged to the two sides of the back of the air distribution plate body 301. When the push rod of the lifting drive component 3022 extends or retracts, the push rod directly pulls or pushes the air distribution plate body 301 to rise or fall as a whole through the hanger 3024. The guide post 30231 of the guide assembly 3023 is vertically fixed on both sides of the fixed base 3021, while the guide sleeve 30232 is fixed to the side of the cylinder of the lifting drive component 3022. The guide sleeve 30232 slides along the guide post 30231 to limit the swing of the cylinder of the lifting drive component 3022 when the push rod moves. The synchronous shaft 3025 is a rigid long shaft, and its two ends are connected to the output shafts of the drive motors of the two adjacent lifting drive components 3022 through gear couplings to ensure that the two motors achieve mechanical synchronous rotation, thereby driving their respective push rods to achieve synchronous lifting and lowering movements. The position sensor 3026 is a contact limit switch, and its trigger rod is set perpendicular to the movement path of the push rod of the lifting drive component 3022. When the push rod moves to the limit position, it will press the trigger rod, thereby sending a positioning signal. The mounting base 3033 of the angle actuator 303 is welded to the top of the drying chamber 1. The tail of the linear actuator 3032 is hinged to the mounting base 3033, and the end of its push rod is hinged to one end of the connecting rod 3031. The other end of the connecting rod 3031 is hinged to the upper back of the inclined guide section 3011. The dust cover 3034 is a retractable bellows structure, with one end fixed to the mounting base 3033 and the other end fixed to the cylinder of the linear actuator 3032, completely covering the push rod portion of the linear actuator 3032.

[0029] The air distribution cavity 401 of the auxiliary airflow guiding system 4 is a rectangular box with a closed top and air outlets 4011 evenly distributed on the bottom and / or side walls. The guide ribs 402 are multiple parallel plate-like structures, parallel to the width of the drying chamber 1, welded or snapped into the air distribution cavity 401, used to divide the airflow entering the cavity and guide it to the air outlets 4011, reducing turbulence. The air distribution baffle 403 is vertically installed inside the air distribution cavity 401, its height matching the inner height of the air distribution cavity 401, dividing the interior of the air distribution cavity 401 into multiple independent sub-channels 405, each sub-channel 405 corresponding to a set of air outlets 4011. The airflow sensor 404 is a differential pressure sensor, with two pressure-tapping probes installed inside the air distribution cavity 401 and near the corresponding air outlet 4011 of the sub-channel 405, respectively. By measuring the pressure difference between the two sides, it indirectly reflects the airflow velocity of the sub-channel 405 and feeds the signal back to the control system.

[0030] Example 2

[0031] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 9 As shown below, see details: Furthermore, the guide post 30231 in the guide assembly 3023 is vertically fixed to the fixed base 3021, and the guide sleeve 30232 is fixed to the movable end of the lifting drive component 3022. The inner wall of the guide sleeve 30232 slides in cooperation with the outer wall of the guide post 30231. When the lifting drive component 3022 drives its movable end to rise and fall, the movable end drives the guide sleeve 30232 to slide up and down along the outer wall of the guide post 30231, thereby achieving guidance and anti-deflection. The hanger rod 3024 is provided with two or four rods. Its upper end is reliably connected to the output end of the corresponding lifting drive component 3022, and its lower end is symmetrically hinged to the two sides or four corners of the back of the wind distribution plate body 301, forming a stable multi-point hanging structure. When the output end of the lifting drive component 3022 moves up and down, the output end drives the wind distribution plate body 301 to move up and down synchronously through the hanger rod 3024. The connection between the hanger rod 3024 and the output end and the wind distribution plate body 301 is provided with an anti-loosening locking structure.

[0032] Furthermore, the two ends of the synchronous shaft 3025 are connected to the output shafts of adjacent lifting drive components 3022 via couplings. When one of the lifting drive components 3022 is started, the rotational motion of its output shaft is transmitted to the adjacent lifting drive component 3022 through the synchronous shaft 3025, forcing the output ends of the two lifting drive components 3022 to keep moving up and down synchronously. The position sensor 3026 is a photoelectric or magnetic proximity switch, and its probe is aligned with the movable end or guide sleeve 30232 of the lifting drive component 3022. When the movable end moves up and down to the preset limit position, the movable end or guide sleeve 30232 will trigger the position sensor 3026. The position sensor 3026 then sends an electrical signal to the control system of the equipment to stop or reverse the driving of the lifting drive component 3022.

[0033] Furthermore, the mounting base 3033 is fixed to the top of the drying chamber 1 by bolts. One end of the linear actuator 3032 is hinged to the mounting base 3033 by a pin, and the other end of the linear actuator 3032 is connected to the connecting rod 3031 by a ball joint. When the linear actuator 3032 moves in extension and retraction, the output rod of the linear actuator 3032 pushes or pulls the connecting rod 3031. The connecting rod 3031 drives the inclined guide section 3011 to rotate around its hinge point with the air distribution plate body 301, thereby adjusting the tilt angle of the air distribution plate body 301. The dust cover 3034 is a corrugated tubular structure. The two ends of the dust cover 3034 are respectively sealed and connected to the mounting base 3033 and the cylinder of the linear actuator 3032. The dust cover 3034 folds or extends with the extension and retraction of the linear actuator 3032 to fully protect the linear actuator 3032.

[0034] Furthermore, the air distribution baffle 403 is vertically installed inside the air distribution cavity 401 by welding or detachment. The air distribution baffle 403 divides the interior of the air distribution cavity 401 into multiple parallel sub-air ducts 405. After hot air enters the air distribution cavity 401, it is divided by the air distribution baffle 403 and guided to each sub-air duct 405. The airflow sensor 404 is a hot wire or ultrasonic sensor. The airflow sensor 404 is fixed to the air outlet panel of the air distribution cavity 401 by an embedded mounting base. The probe of the airflow sensor 404 faces the air outlet direction of the sub-air duct 405 and is used to monitor the airflow speed at the outlet of each sub-air duct 405 in real time. The airflow sensor 404 transmits the detected signal to the equipment control system. The control system judges the airflow uniformity based on the signal difference and adjusts the speed of the circulating fan 201 or the damper opening.

[0035] Furthermore, the circulating air duct 203 is sealed to the air outlet and air inlet of the drying chamber 1 by flange or welding to form a closed circulation loop; the circulating fan 201 is installed in the straight section of the circulating air duct 203, and the heater 202 is installed in the circulating air duct 203 and located downstream of the circulating fan 201; when the circulating fan 201 is started, the motor of the circulating fan 201 drives the impeller to rotate, and the impeller generates negative pressure to draw air from the drying chamber 1 into the circulating air duct 203. When the air flows through the heater 202, the heating element of the heater 202 heats the air. The heated air flows along the circulating air duct 203 under the push of the circulating fan 201 and re-enters the drying chamber 1 to achieve continuous circulation of hot air; the heater 202 is fixed inside the circulating air duct 203 by a support frame, and the bends of the circulating air duct 203 are set as smooth arcs to guide the airflow direction.

[0036] Furthermore, the fresh air inlet 2041 is connected to the circulating air duct 203 via a first connecting pipe, and a first regulating valve is installed at the fresh air inlet 2041. The exhaust outlet 2042 is connected to the circulating air duct 203 via a second connecting pipe, and a second regulating valve is installed at the exhaust outlet 2042. Both the first and second regulating valves are driven by electric actuators to rotate their valve plates to change their opening. When fresh air needs to be supplied, the control system controls the opening of the first regulating valve to increase, and at the same time controls the opening of the second regulating valve to increase. External air enters the circulating air duct 203 through the fresh air inlet 2041, while some of the humid air in the drying chamber 1 is discharged through the exhaust outlet 2042, forming an air exchange process. The first regulating valve is linked with the circulating fan 201. When the speed of the circulating fan 201 changes, the control system adjusts the opening ratio of the first and second regulating valves according to the preset program.

[0037] Furthermore, the support frame 102 is formed by welding transverse support beams and longitudinal support beams to form a grid structure. The support frame 102 is fixed to the inner bottom surface of the drying chamber 1 by its bottom support feet. The flow equalization plate 101 is a flat plate with multiple flow equalization holes. The flow equalization plate 101 is laid flat on the top grid of the support frame 102. The buckle 103 is an elastic metal sheet or a rotary lock. The base of the buckle 103 is fixed to the side of the support beam of the support frame 102. The movable pressure arm of the buckle 103 presses against the upper edge of the flow equalization plate 101. When the flow equalization plate 101 needs to be installed, the flow equalization plate 101 is aligned with the support frame 102 and placed down. Then, the movable pressure arm of the buckle 103 is moved to make it elastically deform or rotate until the movable pressure arm fastens the flow equalization plate 101, thereby realizing the quick fixation and anti-displacement of the flow equalization plate 101 on the support frame 102.

[0038] Furthermore, the return air cavity 104 is formed by the flow equalization plate 101, the inner wall of the drying chamber 1, and the bottom. The return air outlet 105 is connected to the inlet end of the circulating air duct 203 of the hot air circulation system 2 through a connecting flange. The guide slope 106 extends downward from the bottom center of the return air cavity 104 towards the side wall where the return air outlet 105 is located. When the hot air carrying moisture passes through the flow equalization holes of the flow equalization plate 101 from top to bottom, it enters the return air cavity 104. Under the action of gravity and airflow, the hot air converges along the slope of the guide slope 106 and flows to the return air outlet 105. The inspection port 107 is opened at the end of the return air cavity 104 away from the return air outlet 105. A sealing door is hinged on the inspection port 107. The sealing door is pressed and sealed against the wall of the return air cavity 104 by the locking handle. When it is necessary to clean the return air cavity 104 or inspect the guide slope 106, the inspection port 107 can be exposed by opening the locking handle and turning the sealing door.

[0039] Furthermore, the observation window 108 is embedded and fixed in the side wall opening of the drying chamber 1 through its window frame, and high-temperature resistant sealant is filled between the window frame and the side wall; the thermometer 110 is a bimetallic thermometer or thermocouple, and the temperature sensing probe of the thermometer 110 extends through the window frame of the observation window 108 into the interior of the drying chamber 1, while the display dial of the thermometer 110 is fixed to the outside of the window frame of the observation window 108; the maintenance door 109 is installed at the side wall opening of the drying chamber 1 via hinges, and a locking handle is provided on the edge of the maintenance door 109; the sealing strip 111 is... A silicone or rubber strip, the sealing strip 111, is fixed to the groove around the door of the inspection door 109 by adhesive or slotting. When the inspection door 109 is closed, the locking handle drives the door to press against the side wall of the drying chamber 1, forcing the sealing strip 111 to undergo elastic compression deformation, thereby forming a seal between the inspection door 109 and the side wall of the drying chamber 1. The thermometer 110 on the observation window 108 displays a value that can be read visually by the operator and serves as one of the references for adjusting the power of the heater 202 in the hot air circulation system 2.

[0040] 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. Finally, the above description is only a preferred embodiment of the present invention and is 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 hot air circulating drying device with an air distribution plate structure, comprising: The drying chamber (1) and the hot air circulation system (2) disposed in the drying chamber (1) are characterized in that they further include: The air distribution plate system (3) is installed in the drying chamber (1) and located above the area of ​​the material to be dried; The air distribution plate system (3) includes an air distribution plate body (301), a lifting actuator (302), and an angle actuator (303). The wind distribution plate body (301) includes an inclined guide section (3011) and a horizontal blocking section (3012) that are connected to each other. The lifting actuator (302) includes a fixed base (3021) connected to the top of the drying chamber (1) and a lifting drive (3022) movably connected to the fixed base (3021). The angle actuator (303) includes a link (3031) hinged to the back of the inclined guide section (3011) and a linear actuator (3032) that drives the link (3031). An auxiliary flow guiding system (4) is provided in the drying chamber (1) and located downstream of the air distribution plate system (3); The auxiliary airflow guiding system (4) includes an air distribution cavity (401) and a flow guiding rib (402). The wall of the air distribution cavity (401) is provided with a plurality of air outlet holes (4011), and the flow guiding rib (402) is located inside the air distribution cavity (401).

2. The hot air circulating drying equipment with a uniform air distribution plate structure according to claim 1, characterized in that: The lifting actuator (302) also includes a guide assembly (3023) and a boom (3024). The guide assembly (3023) includes a guide post (30231) disposed on the fixed base (3021) and a guide sleeve (30232) disposed on the movable end of the lifting drive component (3022). The upper end of the boom (3024) is connected to the output end of the lifting drive (3022), and the lower end is connected to the wind distribution plate body (301).

3. A hot air circulating drying device with an air distribution plate structure according to claim 2, characterized in that: The lifting actuator (302) also includes a synchronous shaft (3025) and a position sensor (3026). The synchronous shaft (3025) is located between adjacent lifting drive components (3022); The position sensor (3026) is mounted on the fixed base (3021).

4. A hot air circulating drying device with an air distribution plate structure according to claim 1, characterized in that: The angle actuator (303) also includes a mounting base (3033) and a dust cover (3034); The mounting base (3033) is located at the top of the drying chamber (1), and one end of the linear driver (3032) is connected to the mounting base (3033); The dust cover (3034) is placed over the outside of the linear drive (3032).

5. A hot air circulating drying device with an air distribution plate structure according to claim 1, characterized in that: The auxiliary airflow guiding system (4) also includes an air distribution baffle (403) and an airflow sensor (404). The air distribution baffle (403) is disposed inside the air distribution cavity (401) to divide its interior into multiple sub-air ducts (405). The airflow sensor (404) is disposed on the air outlet surface of the air distribution cavity (401).

6. A hot air circulating drying device with a uniform air distribution plate structure according to claim 1, characterized in that: The hot air circulation system (2) includes a circulating fan (201), a heater (202), and a circulating air duct (203); The circulating air duct (203) is connected to the air outlet and air inlet of the drying chamber (1); The circulating fan (201) and the heater (202) are disposed in the circulating air duct (203).

7. A hot air circulating drying device with an air distribution plate structure according to claim 6, characterized in that: The hot air circulation system (2) also includes a fresh air conditioning unit (204), which includes a fresh air inlet (2041) and an exhaust outlet (2042). The fresh air inlet (2041) and the exhaust gas outlet (2042) are respectively connected to the circulating air duct (203).

8. A hot air circulating drying device with a uniform air distribution plate structure according to claim 1, characterized in that: The drying chamber (1) is provided with a flow equalization plate (101) and a support frame (102) for supporting the flow equalization plate (101) and a buckle (103) for fixing the flow equalization plate (101) to the support frame (102).

9. A hot air circulating drying device with an air distribution plate structure according to claim 7, characterized in that: A return air cavity (104) is formed below the flow equalization plate (101). A return air inlet (105) is provided on the side wall of the return air cavity (104). A flow guide slope (106) is provided at the bottom of the return air cavity (104). An inspection port (107) is provided at the end of the return air cavity (104).

10. A hot air circulating drying device with an air distribution plate structure according to claim 8, characterized in that: The side wall of the drying chamber (1) is provided with an observation window (108), an inspection door (109), a thermometer (110) installed in the observation window (108), and a sealing strip (111) installed around the inspection door (109).

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