Wood drying machine based on intelligent temperature and humidity collaborative control and drying method thereof

Abstract

The present application relates to the technical field of sawdust drying, and discloses a wood drying machine based on intelligent temperature and humidity cooperative control and a drying method thereof, which comprises a main body shell, a discharge pipe is fixedly installed inside the right end of the main body shell, a temperature sensing adjusting mechanism for converting discharge temperature change into lifting force is installed at the inside right side of the discharge pipe, and a synchronous speed regulating mechanism for converting meshing force into rotating speed regulating force is installed at the power output end of the temperature sensing adjusting mechanism. The wood drying machine based on intelligent temperature and humidity cooperative control and the drying method thereof, by installing a heat-sensitive bag at the discharge pipe, utilize the lifting force generated by the thermal expansion and cold contraction of the internal medium to directly drive the connecting rod, the rack and the gear to mesh, drive the control rod to rotate, and thereby control the opening of the hot air valve to regulate the hot air volume. The pure mechanical sensing mode is not affected by the acidic water vapor evaporated from the sawdust, and does not have the phenomenon of temperature signal dramatic fluctuation or misjudgment.

Description

Technical Field

[0001] This invention relates to the field of wood chip drying technology, specifically to a wood dryer and drying method based on intelligent temperature and humidity coordinated control. Background Technology

[0002] A wood chip dryer is an industrial device specifically designed to reduce the moisture content of biomass materials such as wood chips and sawdust. It is widely used in industries such as biomass pellet fuel, engineered wood products, and animal bedding. Its core working principle is to generate a high-temperature airflow through a hot air furnace, which directly contacts the wet wood chips inside a drum or airflow drying tube, using heat exchange to evaporate the moisture. A wood chip dryer based on intelligent temperature and humidity coordinated control integrates multiple temperature and humidity sensors and adaptive control algorithms into a traditional structure.

[0003] In existing technologies, wood chip dryers based on intelligent temperature and humidity coordinated control have a feeding device that evenly feeds wet wood chips into the drum. The system first detects the initial state through an inlet temperature and humidity sensor. During the drying process, sensors arranged at the front, middle, and rear sections of the drum collect hot air temperature and wood chip surface humidity data in real time. The central controller dynamically adjusts the fuel supply speed of the hot air furnace, the drum speed, and the frequency of the exhaust fan through a coordinated control algorithm. The moisture detector at the outlet will provide feedback on the actual moisture content, and the system automatically corrects subsequent processing parameters.

[0004] However, during operation, electronic sensors are prone to malfunction in high humidity and dusty environments. Acidic water vapor evaporated from sawdust will condense on the electronic sensors, causing the electronic temperature controller to display erroneous temperatures that fluctuate wildly. This leads to PLC misjudgment and the issuance of chaotic commands. This out-of-control state not only increases the risk of fuel waste and over-burning or under-drying of sawdust, but also causes fires or blockages due to temperature runaway. Ultimately, this results in the inability to guarantee drying quality and a sharp decline in equipment operational safety.

[0005] Although temperature control can be achieved by detecting the temperature of the sawdust at the discharge port and coordinating it with the hot air intake, the feed rate remains constant during adjustment. It cannot be adjusted synchronously based on temperature changes. This one-way adjustment fails to coordinate and control the material residence time, leading to significant fluctuations in the moisture content of the discharged material. In mild cases, some sawdust may not be fully dried, making it prone to mold and decay; in severe cases, some sawdust may become over-dried due to prolonged exposure to high-temperature hot air, resulting in significant calorific value loss and increased risk of spontaneous combustion and dust explosion due to excessively high discharge temperature and static electricity generated by friction. Ultimately, this results in low yield of dried finished products, high energy consumption, and significant safety hazards. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a wood dryer and its drying method based on intelligent temperature and humidity coordinated control. It has the advantage of being able to simultaneously control the feed rate while adjusting the heat of the incoming air, thus solving the problems mentioned in the background technology.

[0007] The present invention provides the following technical solution: a wood dryer based on intelligent temperature and humidity coordinated control, including a main shell, a discharge pipe fixedly installed inside the right end of the main shell, a temperature sensing and regulating mechanism that converts the discharge temperature change into lifting force is installed inside the right side of the discharge pipe, and a synchronous speed regulating mechanism that converts the meshing force into rotational speed regulating force is installed at the power output end of the temperature sensing and regulating mechanism. The temperature sensing and regulating mechanism and the synchronous speed regulating mechanism together constitute the temperature and humidity synchronous regulating mechanism.

[0008] Preferably, the temperature sensing and regulating mechanism includes a thermal pack, a sensing contact, a connecting rod, a rack, a hot air valve, a control rod, and a gear. The left side of the thermal pack is fixedly installed with the right side of the discharge pipe. One end of the sensing contact is fixedly installed with the inside of the thermal pack, and the other end of the sensing contact is installed with the inside of the discharge pipe. The bottom of the connecting rod is fixedly installed with the top of the thermal pack. The right side of the rack is fixedly installed with the left side of the connecting rod. The outer surface of the gear meshes with the back of the rack. The outer surface of the control rod is fixedly installed with the inside of the gear. The inside of the hot air valve is controlled by the outer surface of the control rod. A synchronous pulley is fixedly installed on the outer surface of the control rod.

[0009] Preferably, the synchronous speed regulating mechanism includes an L-shaped plate, a drive motor, a mechanical continuously variable transmission (CVT), an input shaft, an output shaft, a speed regulating shaft, a second synchronous pulley, and a feed pipe. The bottom outer surface of the feed pipe is fixedly installed to the left inner side of the main body shell. The front of the L-shaped plate is fixedly installed to the back of the feed pipe. The front of the drive motor is fixedly installed to the back of the L-shaped plate. The bottom of the mechanical CVT is fixedly installed to the inner upper surface of the L-shaped plate. One end of the input shaft is fixedly connected to the flexible coupling of the drive motor. One end of the output shaft is fixedly installed to the interior of the drive motor, and one end of the input shaft is fixedly installed to the interior of the drive motor. One end of the speed regulating shaft is installed inside the mechanical CVT. The interior of the second synchronous pulley is fixedly installed to the outer surface of the speed regulating shaft.

[0010] Preferably, a hot air blower is installed on the left rear side of the main body shell, and a transmission pipe is installed at the air outlet end of the hot air blower. One end of the transmission pipe is fixedly installed to the air inlet end of the hot air valve, and a transmission pipe is fixedly installed at the air outlet end of the hot air valve. One end of the transmission pipe is fixedly installed inside the main body shell.

[0011] Preferably, a timing belt is driven and installed on the outer surface of the second timing pulley, and the inner ring of the timing belt is driven and installed on the outer surface of the first timing pulley.

[0012] Preferably, a rotating shaft is fixedly installed on the inner wall of the feed pipe, one end of the rotating shaft is fixedly installed with one end of the output shaft, multiple sets of feed blades are installed on the outer surface of the rotating shaft, and a dustproof plate is fixedly installed on the back of the feed pipe.

[0013] Preferably, a connecting shaft is installed inside the main body shell, and a hot air outlet pipe is fixedly installed inside the right side of the main body shell.

[0014] Preferably, a placement rack is installed on the left side of the front of the main body shell, a geared motor is fixedly installed on the upper surface of the placement rack, a small aperture is installed on the outer surface of the output end of the geared motor, a placement plate is installed on the left side of the front of the main body shell, the interior of the placement plate is installed with the outer surface of the small aperture, a large aperture is attached to the outer surface of the small aperture, and the inner ring of the large aperture is fixedly installed with the left outer surface of the main body shell.

[0015] Preferably, a second placement rack is installed on the right side of the front of the main body shell, a second reduction motor is fixedly installed on the upper surface of the second placement rack, a small gear ring is installed on the outer surface of the output end of the second reduction motor, a second placement plate is installed on the left side of the front of the main body shell, the interior of the second placement plate is installed with the outer surface of the small gear ring, a large gear ring is engaged with the outer surface of the small gear ring, and the inner ring of the large gear ring is fixedly installed with the outer surface of the right side of the main body shell.

[0016] A wood drying method based on intelligent temperature and humidity coordinated control includes the following specific steps: S1. Start geared motor one and geared motor two, which drive the rollers inside the main body shell to rotate through small and large aperture rings and small and large gear rings respectively; at the same time, start the drive motor, and the power is transmitted to the input shaft of the mechanical continuously variable transmission through the flexible coupling, and then drives the rotating shaft and the feed blades inside the feed pipe to rotate, continuously and evenly feeding the wet wood chips into the main body shell. S2. Start the hot air blower to generate high-temperature hot air. The hot air passes sequentially through transmission pipe one, the hot air valve, and transmission pipe two into the main body casing to dry the wet sawdust inside the drum. The opening degree of the hot air valve is controlled by a control lever, and the rotation angle of the control lever is determined by the subsequent temperature sensing step. S3. When the dried wood chips are discharged from the discharge pipe, the heat-sensitive bag installed on the right side of the discharge pipe directly contacts the hot wood chips through its sensing contact. When the discharge temperature changes, the thermal expansion and contraction of the medium inside the heat-sensitive bag generates a lifting force, which pushes the connecting rod and rack to move up and down. The rack and gear mesh to convert the lifting force into a rotational force, driving the control rod to rotate. The control rod drives the hot air valve to change its opening, thereby dynamically adjusting the amount of hot air entering the main body shell. S4. While the control lever rotates, the first synchronous wheel fixed to its outer surface rotates synchronously. The rotational motion is transmitted to the second synchronous wheel through the synchronous belt. The second synchronous wheel drives the speed regulating shaft of the mechanical continuously variable transmission to rotate. The speed regulating shaft changes the transmission ratio inside the mechanical continuously variable transmission, thereby adjusting the speed of the output shaft and ultimately changing the rotational speed of the feed blade.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This type of wood dryer based on intelligent temperature and humidity coordinated control uses a heat-sensitive pack installed at the discharge pipe. The heat-sensitive pack utilizes the lifting force generated by the thermal expansion and contraction of its internal medium to directly drive the connecting rod, rack, and gear, which in turn rotate the control rod. This controls the opening of the hot air valve to regulate the hot air volume. This purely mechanical sensing method is unaffected by the acidic water vapor evaporated from the wood chips, preventing drastic temperature signal fluctuations or misjudgments, ensuring the accuracy and stability of temperature detection. The heat-sensitive pack's sensing contacts are directly inserted into the discharge pipe to contact the hot wood chips, providing timely response without signal delay. This avoids a series of problems caused by electronic sensor failure, such as PLC misjudgments, chaotic control commands, fuel waste, over-burning or under-drying of wood chips, fires, and blockages, thus improving the dryer's operational reliability and safety under harsh conditions.

[0018] 2. This type of wood dryer based on intelligent temperature and humidity coordinated control, when the control lever is rotated, the first synchronous wheel fixed on its outer surface rotates synchronously. The rotational power is transmitted to the second synchronous wheel through the synchronous belt, which in turn drives the speed regulating shaft of the mechanical continuously variable transmission to rotate. By changing the internal transmission ratio of the transmission, the speed of the output shaft is adjusted, and finally the rotation speed of the feed blades on the rotating shaft inside the feed pipe is controlled. This not only maintains the stability of the output moisture content and avoids the loss of heat value and the risk of spontaneous combustion caused by incomplete or excessive drying of wood chips, but also reduces fuel waste and energy consumption, and improves the yield of dried products and the safety of equipment operation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 For the present invention Figure 1 A top-view structural diagram; Figure 3 For the present invention Figure 1 A schematic diagram of the rear view structure; Figure 4 For the present invention Figure 1 A schematic diagram of the structure viewed from below; Figure 5 For the present invention Figure 1 A schematic diagram of the cross-sectional structure; Figure 6 For the present invention Figure 5 Enlarged schematic diagram of the structure at point A; Figure 7 For the present invention Figure 5 Enlarged schematic diagram of the structure at point B.

[0020] In the diagram: 1. Main body shell; 2. Connecting shaft; 3. Placement rack one; 4. Gear motor one; 5. Placement plate one; 6. Small aperture; 7. Large aperture; 8. Placement rack two; 9. Gear motor two; 10. Placement plate two; 11. Small gear ring; 12. Large gear ring; 13. Hot air outlet pipe; 14. Discharge pipe; 15. Thermal pack; 16. Induction contact; 17. Connecting rod; 18. Rack; 19. Hot air blower; 20. Transmission pipe one; 21. Hot air valve; 22. Transmission pipe two; 23. Control rod; 24. Gear; 25. Synchronous pulley one; 26. Synchronous belt; 27. L-shaped plate; 28. Drive motor; 29. ​​Mechanical continuously variable transmission; 30. Input shaft; 31. Output shaft; 32. Speed ​​regulating shaft; 33. Synchronous pulley two; 34. Feed pipe; 35. Rotating shaft; 36. Feed blade; 37. Dustproof plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 A wood dryer based on intelligent temperature and humidity coordinated control includes a main shell 1. A discharge pipe 14 is fixedly installed inside the right end of the main shell 1. A temperature sensing and regulating mechanism that converts the discharge temperature change into lifting force is installed inside the right side of the discharge pipe 14. A synchronous speed regulating mechanism that converts the meshing force into rotation speed regulating force is installed at the power output end of the temperature sensing and regulating mechanism. The temperature sensing and regulating mechanism and the synchronous speed regulating mechanism together form the temperature and humidity synchronous regulating mechanism. The temperature sensing and regulating mechanism includes a thermal pack 15, a sensing contact 16, a connecting rod 17, a rack 18, a hot air valve 21, a control rod 23, and a gear 24. The left side of the thermal pack 15 is fixedly installed with the right side of the discharge pipe 14. One end of the sensing contact 16 is fixedly installed with the inside of the thermal pack 15, and the other end of the sensing contact 16 is installed with the inside of the discharge pipe 14. The bottom of the connecting rod 17 is fixedly installed with the top of the thermal pack 15. The right side of the rack 18 is fixedly installed with the left side of the connecting rod 17. The outer surface of wheel 24 meshes with the back of rack 18. The outer surface of control lever 23 is fixedly installed inside gear 24. The inside of hot air valve 21 is controlled and installed on the outer surface of control lever 23. Synchronous wheel 25 is fixedly installed on the outer surface of control lever 23. Hot air fan 19 is installed on the back left side of main body shell 1. Transmission pipe 20 is installed at the air outlet of hot air fan 19. One end of transmission pipe 20 is fixedly installed at the air inlet of hot air valve 21. Transmission pipe 22 is fixedly installed at the air outlet of hot air valve 21. One end of transmission pipe 22 is fixedly installed inside main body shell 1.

[0023] Specifically, the temperature sensing and regulating mechanism uses the thermal sensor 15 to sense the temperature change inside the discharge pipe 14 in real time, and converts the temperature signal into mechanical lifting force. This force is transmitted to the gear 24 via the sensing contact 16, connecting rod 17, and rack 18, driving the control rod 23 to rotate, thereby automatically adjusting the opening and closing degree of the hot air valve 21. This structure achieves real-time feedback of the discharge end temperature and adaptive linkage of the hot air supply, effectively avoiding problems such as wood cracking due to excessively high discharge temperature or insufficient drying due to excessively low temperature, significantly improving the uniformity of wood drying and the quality of the finished product.

[0024] Please see Figure 1 , Figure 6 and Figure 7The synchronous speed regulating mechanism includes an L-shaped plate 27, a drive motor 28, a mechanical continuously variable transmission 29, an input shaft 30, an output shaft 31, a speed regulating shaft 32, a synchronous pulley 33, and a feed pipe 34. The bottom outer surface of the feed pipe 34 is fixedly installed to the left inner side of the main body shell 1. The front of the L-shaped plate 27 is fixedly installed to the back of the feed pipe 34. The front of the drive motor 28 is fixedly installed to the back of the L-shaped plate 27. The bottom of the mechanical continuously variable transmission 29 is fixedly installed to the inner upper surface of the L-shaped plate 27. One end of the input shaft 30 is fixedly connected to the flexible coupling of the drive motor 28. One end of the output shaft 31 is fixedly installed inside the drive motor 28, and one end of the input shaft 30 is connected to the drive motor 28. The machine 28 is fixedly installed inside. One end of the speed regulating shaft 32 is installed inside the mechanical continuously variable transmission 29. The inner side of the second synchronous pulley 33 is fixedly installed on the outer surface of the speed regulating shaft 32. The outer surface of the second synchronous pulley 33 is driven by a synchronous belt 26. The inner ring of the synchronous belt 26 is driven by the outer surface of the first synchronous pulley 25. The inner wall of the feed pipe 34 is fixedly installed with a rotating shaft 35. One end of the rotating shaft 35 is fixedly installed on one end of the output shaft 31. Multiple sets of feed blades 36 are installed on the outer surface of the rotating shaft 35. A dustproof plate 37 is fixedly installed on the back of the feed pipe 34. The main body shell 1 is installed inside the connecting shaft 2. The right side of the main body shell 1 is fixedly installed with a hot air outlet pipe 13.

[0025] Specifically, the synchronous speed control mechanism drives a mechanical continuously variable transmission (CVT) 29 via a drive motor 28. Power is transmitted through the input shaft 30 and output shaft 31, and the speed control shaft 32 drives the second synchronous pulley 33 to rotate. Then, through the transmission between the synchronous belt 26 and the first synchronous pulley 25, the meshing force of the gear 24 is converted into a rotational speed control force, achieving continuous stepless adjustment of the feed speed. This structure allows the feed speed to be dynamically matched based on the temperature feedback at the discharge end, avoiding problems such as decreased drying efficiency or overheating of the wood due to asynchrony between the feed speed and drying temperature. The rotating shaft 35 is fixedly connected to the output shaft 31. Multiple sets of feeding blades 36 on its outer surface automatically adjust the feeding amount and stirring intensity according to the rotation speed. When the rotation speed is high, the feeding is fast and the stirring is thorough; when the rotation speed is low, the feeding is slow and the residence time is extended, forming an adaptive closed loop between the feeding speed and the drying rhythm. In conjunction with the dustproof plate 37 on the back of the feeding pipe 34, external dust is effectively prevented from entering the interior of the main body shell 1 with the feeding material during speed adjustment, ensuring the cleanliness of the drying environment.

[0026] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4On the left side of the front of the main body shell 1, a placement rack 3 is installed. A geared motor 4 is fixedly installed on the upper surface of the placement rack 3. A small aperture 6 is installed on the outer surface of the output end of the geared motor 4. On the left side of the front of the main body shell 1, a placement plate 5 is installed. The inside of the placement plate 5 is installed on the outer surface of the small aperture 6. A large aperture 7 is attached to the outer surface of the small aperture 6. The inner ring of the large aperture 7 is fixedly installed on the left outer surface of the main body shell 1. On the right side of the front of the main body shell 1, a placement rack 8 is installed. A geared motor 9 is fixedly installed on the upper surface of the placement rack 8. A small gear ring 11 is installed on the outer surface of the output end of the geared motor 9. On the left side of the front of the main body shell 1, a placement plate 10 is installed. The inside of the placement plate 10 is installed on the outer surface of the small gear ring 11. A large gear ring 12 is engaged with the outer surface of the small gear ring 11. The inner ring of the large gear ring 12 is fixedly installed on the right outer surface of the main body shell 1.

[0027] Specifically, by setting up a placement rack 3 and a placement plate 5 on the left side of the front of the main body shell 1, and a placement rack 8 and a placement plate 10 on the right side, and correspondingly installing a reduction motor 4 and a reduction motor 9, this invention achieves redundant drive and smooth transmission at both ends of the roller. The reduction motor 4 on the left side drives the large aperture 7 to rotate via a small aperture 6 through friction contact, while the reduction motor 9 on the right side drives the large gear ring 12 to rotate via a small gear ring 11 through meshing. The two transmission methods work together to distribute the radial load on the bearings at both ends of the roller during single-sided drive, avoiding sagging deformation or asynchronous phenomena at both ends due to excessive roller length. Furthermore, when one set of reduction motors or transmission components fails, the other set can still temporarily maintain roller operation, improving the equipment's fault tolerance and continuous operation capability.

[0028] A wood drying method based on intelligent temperature and humidity coordinated control includes the following specific steps: S1. Start the geared motor 4 and geared motor 9, which drive the roller inside the main body shell 1 to rotate through the small aperture 6 and large aperture 7, and the small gear ring 11 and large gear ring 12 respectively; at the same time, start the drive motor 28, and the power is transmitted through the flexible coupling to the input shaft 30 of the mechanical continuously variable transmission 29, and then through the output shaft 31 to drive the rotating shaft 35 and the feed blades 36 inside the feed pipe 34 to rotate, so as to continuously and evenly feed the wet wood chips into the main body shell 1. S2. Start the hot air blower 19 to generate high-temperature hot air. The hot air passes sequentially through transmission pipe 1 20, hot air valve 21, and transmission pipe 22 into the main body shell 1 to dry the wet sawdust inside the drum. The opening degree of the hot air valve 21 is controlled by the control lever 23, and the rotation angle of the control lever 23 is determined by the subsequent temperature sensing step. S3. When the dried wood chips are discharged from the discharge pipe 14, the heat-sensitive bag 15 installed on the right side of the discharge pipe 14 directly contacts the hot wood chips through its sensing contact 16. When the discharge temperature changes, the internal medium of the heat-sensitive bag 15 expands and contracts due to heat, generating a lifting force that pushes the connecting rod 17 and the rack 18 to move up and down. The rack 18 meshes with the gear 24 to convert the lifting force into a rotational force, driving the control rod 23 to rotate. The control rod 23 drives the hot air valve 21 to change its opening, thereby dynamically adjusting the amount of hot air entering the main body shell 1. S4. While the control lever 23 rotates, the synchronous pulley 25 fixed to its outer surface rotates synchronously. The rotational motion is transmitted to the synchronous pulley 33 through the synchronous belt 26. The synchronous pulley 33 drives the speed regulating shaft 32 of the mechanical continuously variable transmission 29 to rotate. The speed regulating shaft 32 changes the transmission ratio inside the mechanical continuously variable transmission 29, thereby adjusting the speed of the output shaft 31 and ultimately changing the rotational speed of the feed blade 36.

[0029] Working principle: During operation, after the equipment is started, geared motor 4 drives the large gear 7 to rotate via the small gear ring 6, and geared motor 9 drives the large gear ring 12 to rotate via the small gear ring 11, jointly driving the drum inside the main body shell 1 to rotate slowly. Simultaneously, the hot air blower 19 starts, generating high-temperature hot air, which sequentially passes through transmission pipe 20, hot air valve 21, and transmission pipe 22 into the main body shell 1 to dry the wet wood chips inside the drum. Drive motor 28 starts, and its power is transmitted through a flexible coupling to the input shaft 30 of the mechanical continuously variable transmission 29. After passing through the speed adjustment mechanism inside the transmission, the power is output from the output shaft 31, driving the rotating shaft 35 to rotate, thereby driving the feed blades 36 inside the feed pipe 34 to rotate, continuously and evenly feeding the wet wood chips into the drum. Dustproof plate 37 is used to prevent dust from entering the transmission components. After the wet wood chips are dried inside the drum, they are discharged from the discharge pipe 14. The heat-sensitive bag 15 is installed on the right side of the discharge pipe 14, and its sensing contact 16 extends into the discharge pipe 14 to directly contact the hot sawdust that has just been discharged. When the discharge temperature changes, the internal medium of the heat-sensitive package 15 expands and contracts due to heat, generating a lifting force that pushes the connecting rod 17 up and down. The connecting rod 17 drives the rack 18 to rise and fall synchronously. The rack 18 meshes with the gear 24, converting the lifting force into a rotational force, which drives the control rod 23 to rotate. The control rod 23 drives the hot air valve 21 to change its opening, thereby adjusting the amount of hot air entering the main body shell 1. While the control rod 23 rotates, the synchronous wheel 25 fixed on its outer surface rotates synchronously. The rotational motion is transmitted to the synchronous wheel 33 through the synchronous belt 26. The synchronous wheel 33 drives the speed regulating shaft 32 of the mechanical continuously variable transmission 29 to rotate. The speed regulating shaft 32 changes the transmission ratio inside the transmission, thereby adjusting the speed of the output shaft 31, and finally changing the rotational speed of the feed blades 36, realizing the synchronous and coordinated adjustment of the feed amount and the hot air volume. The wet and hot exhaust gas generated during the drying process is discharged from the main body shell 1 through the hot air outlet pipe 13. The external dust removal system treats the exhaust gas and discharges it in compliance with standards.

[0030] Both geared motor 4 and geared motor 9 are horizontal geared motors with electromagnetic braking function, used to drive small aperture 6 and small gear ring 11 respectively to drive the drum to rotate smoothly; the thermal pack 15 is a paraffin medium sealed temperature-sensing expansion pack, and its sensing contact 16 is a brass probe that directly extends into the discharge pipe 14 to contact the wood chips to sense temperature changes; the hot air blower 19 is a high-temperature centrifugal hot air furnace, and its air volume is adjusted by the hot air valve 21; the drive motor 28 is a three-phase asynchronous frequency conversion motor, which provides rotational power for the feed blades 36; the mechanical continuously variable transmission 29 is a friction disc type continuously variable transmission, and the whole machine is connected to a 380V three-phase AC power supply, which is supplied through the main distribution box. Geared motor 4, geared motor 9, hot air blower 19 and drive motor 28 are directly powered after being protected by independent air switches and thermal relays. Among them, drive motor 28 does not require frequency converter control and maintains constant speed operation.

[0031] The main body shell 1, discharge pipe 14, feed pipe 34, and transmission pipe 1 20 and transmission pipe 2 22 should be made of 304 or 316L stainless steel to resist the corrosion of the pipe wall by the acidic water vapor evaporated from the wood chips; the shell of the heat-sensitive package 15 and the sensing contact 16 should be made of corrosion-resistant copper alloy or 316L stainless steel, and the internal temperature sensing medium is recommended to be a mixture of highly stable paraffin or ether; the rack 18, gear 24, synchronous pulley 1 25, synchronous pulley 2 33 and synchronous belt 26 should be made of alloy steel that has been carburized and quenched, with a tooth surface hardness of HRC58-62, and dust covers should be installed to isolate wood chip dust; the feed blade 36 and the rotating shaft 35 should be made of wear-resistant stainless steel, and the blade edges can be welded with a wear-resistant layer to extend service life; the connecting rod 17 and the control rod 23 need to be heat-treated and hard chrome plated on the surface to prevent rust.

[0032] When using the thermal pack 15, ensure that the sensing contact 16 is fully inserted into the discharge pipe 14 and in the sawdust falling path. Regularly clean the sawdust carbon deposits or tar layer on the surface of the sensing contact 16 to prevent temperature lag. Control the meshing clearance between the rack 18 and gear 24, and apply high-temperature lithium-based grease as needed. The tension of the synchronous belt 26 must be moderate; too loose will cause slippage, and too tight will accelerate bearing wear between synchronous pulley 1 25 and synchronous pulley 2 33. The mechanical continuously variable transmission 29 must be filled with special traction fluid before use; operation without oil is strictly prohibited. The speed regulating shaft... The rotation range of 32 must not exceed its mechanical limit, otherwise the internal speed regulation mechanism will be damaged. The hot air valve 21 should be manually fully opened and closed once a week to prevent it from jamming due to dust accumulation or heat deformation. The valve stem seal should be made of high-temperature resistant graphite packing and tightened regularly. Although the drive motor 28 operates at a constant speed, a thermal overload protection relay must be installed. When the feed blade 36 is jammed by foreign objects and the current exceeds the standard, the power supply can be automatically cut off. At the same time, it is recommended to use a plum blossom-shaped or nylon pin-type flexible coupling between the output shaft 31 and the rotating shaft 35 of the mechanical continuously variable transmission 29 to absorb impact and compensate for installation deviation.

[0033] It should be noted that the scope of protection of this invention does not involve improvements to the internal structure and methods; furthermore, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, 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 a process, method, article, or apparatus.

[0034] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wood dryer based on intelligent temperature and humidity coordinated control, characterized in that: Includes a main body shell (1), and a discharge pipe (14) is fixedly installed inside the right end of the main body shell (1). A temperature sensing and regulating mechanism that converts the change in discharge temperature into lifting force is installed on the right side of the discharge pipe (14). A synchronous speed regulating mechanism that converts meshing force into rotational speed regulating force is installed at the power output end of the temperature sensing and regulating mechanism. The temperature sensing and regulating mechanism and the synchronous speed regulating mechanism together constitute the temperature and humidity synchronous regulating mechanism.

2. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 1, characterized in that: The temperature sensing and regulating mechanism includes a thermal pack (15), a sensing contact (16), a connecting rod (17), a rack (18), a hot air valve (21), a control rod (23), and a gear (24). The left side of the thermal pack (15) is fixedly installed with the right side of the discharge pipe (14). One end of the sensing contact (16) is fixedly installed with the inside of the thermal pack (15), and the other end of the sensing contact (16) is installed with the inside of the discharge pipe (14). The bottom of the connecting rod (17) is fixedly installed with the top of the thermal pack (15). The right side of the rack (18) is fixedly installed with the left side of the connecting rod (17). The outer surface of the gear (24) meshes with the back of the rack (18). The outer surface of the control rod (23) is fixedly installed with the inside of the gear (24). The inside of the hot air valve (21) is controlled by the outer surface of the control rod (23). A synchronous pulley (25) is fixedly installed on the outer surface of the control rod (23).

3. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 1, characterized in that: The synchronous speed regulating mechanism includes an L-shaped plate (27), a drive motor (28), a mechanical continuously variable transmission (29), an input shaft (30), an output shaft (31), a speed regulating shaft (32), a synchronous pulley (33), and a feed pipe (34). The bottom outer surface of the feed pipe (34) is fixedly installed to the left inner side of the main body shell (1). The front side of the L-shaped plate (27) is fixedly installed to the back side of the feed pipe (34). The front side of the drive motor (28) is fixedly installed to the back side of the L-shaped plate (27). The bottom of the speed reducer (29) is fixedly installed on the inner upper surface of the L-shaped plate (27). One end of the input shaft (30) is fixedly connected to the elastic coupling of the drive motor (28). One end of the output shaft (31) is fixedly installed inside the drive motor (28), and one end of the input shaft (30) is fixedly installed inside the drive motor (28). One end of the speed regulating shaft (32) is installed inside the mechanical continuously variable transmission (29). The inside of the synchronous pulley (33) is fixedly installed on the outer surface of the speed regulating shaft (32).

4. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 2, characterized in that: A hot air blower (19) is installed on the back left side of the main body shell (1). A transmission pipe (20) is installed at the air outlet of the hot air blower (19). One end of the transmission pipe (20) is fixedly installed at the air inlet of the hot air valve (21). A transmission pipe (22) is fixedly installed at the air outlet of the hot air valve (21). One end of the transmission pipe (22) is fixedly installed inside the main body shell (1).

5. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 3, characterized in that: The outer surface of the second synchronous pulley (33) is equipped with a synchronous belt (26), and the inner ring of the synchronous belt (26) is connected to the outer surface of the first synchronous pulley (25).

6. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 3, characterized in that: A rotating shaft (35) is fixedly installed on the inner wall of the feed pipe (34). One end of the rotating shaft (35) is fixedly installed with one end of the output shaft (31). Multiple sets of feed blades (36) are installed on the outer surface of the rotating shaft (35). A dustproof plate (37) is fixedly installed on the back of the feed pipe (34).

7. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 1, characterized in that: A connecting shaft (2) is installed inside the main body shell (1), and a hot air outlet pipe (13) is fixedly installed inside the right side of the main body shell (1).

8. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 1, characterized in that: A placement rack (3) is installed on the left side of the front of the main body shell (1). A geared motor (4) is fixedly installed on the upper surface of the placement rack (3). A small aperture (6) is installed on the outer surface of the output end of the geared motor (4). A placement plate (5) is installed on the left side of the front of the main body shell (1). The interior of the placement plate (5) is installed on the outer surface of the small aperture (6). A large aperture (7) is attached to the outer surface of the small aperture (6). The inner ring of the large aperture (7) is fixedly installed on the outer left side of the main body shell (1).

9. A wood dryer based on intelligent temperature and humidity coordinated control according to claim 1, characterized in that: A second placement rack (8) is installed on the right side of the front of the main body shell (1). A second reduction motor (9) is fixedly installed on the upper surface of the second placement rack (8). A small gear ring (11) is installed on the outer surface of the output end of the second reduction motor (9). A second placement plate (10) is installed on the left side of the front of the main body shell (1). The interior of the second placement plate (10) is installed on the outer surface of the small gear ring (11). A large gear ring (12) is meshed on the outer surface of the small gear ring (11). The inner ring of the large gear ring (12) is fixedly installed on the outer surface of the right side of the main body shell (1).

10. A wood drying method based on intelligent temperature and humidity coordinated control, characterized in that, The specific steps include the following: S1. Start the first geared motor (4) and the second geared motor (9), which drive the roller inside the main body shell (1) to rotate through the small aperture (6) and the large aperture (7), and the small gear ring (11) and the large gear ring (12), respectively; at the same time, start the drive motor (28), and the power is transmitted to the input shaft (30) of the mechanical continuously variable transmission (29) through the flexible coupling, and then through the output shaft (31) to drive the rotating shaft (35) and the feed blade (36) inside the feed pipe (34) to rotate, so as to continuously and evenly feed the wet wood chips into the interior of the main body shell (1). S2. Start the hot air blower (19) to generate high-temperature hot air. The hot air passes through the first transmission pipe (20), the hot air valve (21), and the second transmission pipe (22) in sequence and enters the interior of the main body shell (1) to dry the wet wood chips in the drum. The opening degree of the hot air valve (21) is controlled by the control rod (23), and the rotation angle of the control rod (23) is determined by the subsequent temperature sensing step. S3. When the dried wood chips are discharged from the discharge pipe (14), the heat-sensitive bag (15) installed on the right side of the discharge pipe (14) directly contacts the hot wood chips through its sensing contact (16). When the discharge temperature changes, the thermal expansion and contraction of the medium inside the heat-sensitive bag (15) generates a lifting force, which pushes the connecting rod (17) and rack (18) to move up and down. The rack (18) meshes with the gear (24) to convert the lifting force into a rotational force, which drives the control rod (23) to rotate. The control rod (23) drives the hot air valve (21) to change its opening, thereby dynamically adjusting the amount of hot air entering the main body shell (1). S4. While the control lever (23) rotates, the first synchronous wheel (25) fixed on its outer surface rotates synchronously. The rotational motion is transmitted to the second synchronous wheel (33) through the synchronous belt (26). The second synchronous wheel (33) drives the speed regulating shaft (32) of the mechanical continuously variable transmission (29) to rotate. The speed regulating shaft (32) changes the transmission ratio inside the mechanical continuously variable transmission (29), thereby adjusting the speed of the output shaft (31) and ultimately changing the rotational speed of the feed blade (36).

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