Microwave drying oven and solid wood microwave drying method

Abstract

The invention provides a microwave drying oven which is used for drying wood. The microwave drying box comprises a box body, a sealing assembly, a pressing assembly, an air outlet assembly and a drying assembly, wherein an opening is formed in one side of the box body, the sealing assembly is arranged on the opening, the pressing assembly is installed on the box body and used for pressing wood in the box body, the air outlet assembly is installed on the box body, and the drying assembly is installed in the box body. The drying assembly comprises a fixing piece installed on the outer wall of one side of the box body, a drying piece installed on the fixing piece and a diathermanous channel arranged on the drying piece and opposite to the box body. The fixing piece comprises a supporting plate installed on the outer wall of one side of the box body and a plurality of heat dissipation holes formed in the supporting plate. The drying piece is a microwave generator; according to the microwave drying box, through cooperation of the drying piece and the pressing piece, it can be guaranteed that wood is kept stable in the drying process, damage caused by wood movement is reduced, and the drying effect is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drying equipment, in particular to a microwave drying box and a solid wood microwave drying method. Background Art

[0002] Wood contains a large amount of moisture in the early stages of production. During the processing and assembly of the wood, the wood needs to be dried to ensure subsequent processing. Existing wood drying equipment usually directly heats the wood. During the heating process, due to thermal expansion and contraction, the wood will shift, resulting in the inability to maintain its original position and shape. This can easily affect the drying effect and may cause the wood to deform, crack, and other problems during the drying process. Summary of the Invention

[0003] Based on this, the object of the present invention is to provide a microwave drying oven and a solid wood microwave drying method that can ensure that the wood remains stable during the drying process.

[0004] The present invention adopts the following technical solutions:

[0005] A microwave drying oven for drying wood; the microwave drying oven comprises a box body with an opening on one side, a closing assembly provided on the opening, a pressing assembly mounted on the box body for pressing the wood in the box body, an air outlet assembly mounted on the box body, and a drying assembly mounted in the box body; the drying assembly comprises a fixing member mounted on an outer wall of one side of the box body, a drying member mounted on the fixing member, and a heat-transmitting passage provided on the drying member relative to the box body; the fixing member comprises a support plate mounted on an outer wall of one side of the box body, and a plurality of heat dissipation holes provided on the support plate; the drying member is a microwave generator; the microwave drying oven further comprises an induction assembly mounted on the fixing member, and a support frame mounted on the box body for supporting and placing the wood.

[0006] Furthermore, the sensing component includes a sensing component installed on the fixing component and a sensing channel installed on the sensing component and arranged on the box body.

[0007] Furthermore, the sensing component includes a temperature sensor installed on the fixing component, a humidity sensor installed on the fixing component, and a microwave power sensor installed on the fixing component.

[0008] Furthermore, the microwave drying box further comprises a pouring nozzle mounted on the fixing member; a spraying port is provided on the box body opposite to the pouring nozzle; the pouring nozzle is arranged to extend from one side of the spraying port toward the inside of the box body.

[0009] Furthermore, there are multiple drying elements, and the multiple drying elements are installed on the fixing element in a linear array. There are also multiple heat-transmitting channels, and the multiple heat-transmitting channels are respectively arranged on the box body opposite to the drying elements.

[0010] Furthermore, the closing assembly includes a closing member for closing the opening, a sealing member installed on the box body on one side of the opening, a connecting cantilever with one end installed on the box body and the other end installed on the closing member, and a connecting plate installed on the closing member.

[0011] Furthermore, the closing member includes a fixing plate mounted on the box body, a connecting rod rotatably mounted on the fixing plate, and a rotation locking portion threadedly connected to the connecting rod.

[0012] Furthermore, the clamping assembly includes a hydraulic cylinder installed on the box body, and a pressure plate installed on the driving rod of the hydraulic cylinder.

[0013] Furthermore, there are two support racks, which are placed parallel to the box body. The microwave drying box also includes a drainage pipe installed on the box body between the support racks. The drainage pipe is arranged to be connected to the box body, and the end face of the drainage pipe connected to the box body is arranged to be level with the horizontal plane of the box body.

[0014] A solid wood microwave drying method comprises the following steps:

[0015] Step S1, loading and positioning: Place the solid wood board to be dried horizontally on two parallel support frames in the box, ensuring that the surface of the board faces the heat-transmitting channel;

[0016] Step S2, closing and pressurizing: sealing the box opening by the closing assembly, activating the pressing assembly so that the pressing plate abuts against the upper surface of the solid wood board at a pressure of 0.5-1.2 MPa;

[0017] Step S3, microwave drying start: start multiple microwave generators arranged in a linear array and set the initial power density to 0.8-1.5 W / cm 2 , microwaves penetrate the solid wood board through the heat transmission channel;

[0018] Step S4, dynamic control:

[0019] The temperature sensor and humidity sensor are used to monitor the environment in the box in real time and control the temperature at 45-90℃;

[0020] Based on the feedback from the microwave power sensor, the power of each microwave generator is adjusted in each zone to make the moisture content gradient of the wood board ≤3% / cm;

[0021] When the surface temperature of the wood board is detected to be greater than 180℃, the microwave power is automatically reduced by 10-30% and the pouring nozzle is started to spray ≤50mL / min·m 2 of atomized water;

[0022] Step S5, drainage of seepage: the wood seepage is discharged through the drainage pipe between the support frames, and the height of the drainage outlet is flush with the bottom surface of the box;

[0023] Step S6, stop drying: stop the microwave when the moisture content of the center of the solid wood board drops to 8-12%.

[0024] The beneficial effects of the present invention are:

[0025] The microwave drying oven of the present invention can ensure that wood remains stable during the drying process through the cooperation of a drying element and a pressing element, thereby reducing damage caused by movement of the wood and improving the drying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a perspective schematic diagram of a microwave drying oven according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A three-dimensional schematic diagram of a microwave drying oven with the sealing component removed;

[0028] Figure 3 for Figure 1 Exploded view of a microwave drying oven;

[0029] Figure 4 for Figure 3 A partial enlarged view of the microwave drying oven.

[0030] 11. Opening; 10. Box body; 20. Closing assembly; 30. Pressing assembly; 40. Air outlet assembly; 50. Drying assembly; 51. Fixing member; 52. Drying member; 53. Heat-permeable channel; 60. Sensing assembly; 62. Sensing channel; 610. Temperature sensor; 611. Humidity sensor; 612. Microwave power sensor; 70. Pouring nozzle; 71. Spraying port; 21. Closing member; 22. Sealing member; 23. Connecting cantilever; 24. Connecting plate; 210. Fixing plate; 211. Connecting rod; 212. Rotating locking portion; 80. Support frame; 90. Drainage pipe; 510. Support plate; 511. Heat dissipation hole. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of the present invention and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0034] See also Figures 1 to 4 This is a microwave drying oven according to one embodiment of the present invention, used for drying wood. The microwave drying oven includes a housing 10 with an opening 11 on one side, a sealing assembly 20 disposed on the opening 11, a compression assembly 30 mounted on the housing 10 for compressing the wood within the housing 10, an air outlet assembly 40 mounted on the housing 10, and a drying assembly 50 mounted within the housing 10. The drying assembly 50 includes a fixing member 51 mounted on an outer wall of the housing 10, a drying element 52 mounted on the fixing member 51, and a heat-transmitting passage 53 disposed on the drying element 52 relative to the housing 10. The fixing member 51 includes a support plate 510 mounted on an outer wall of the housing 10 and a plurality of heat dissipation holes 511 disposed on the support plate 510. The drying element 52 is a microwave generator. In this embodiment, the air outlet assembly 40 includes an air outlet pipe mounted on the top of the housing 10 and communicating with the interior and exterior of the housing 10. Specifically, there are two air outlet pipes.

[0035] The working principle of the microwave drying oven of the present invention is as follows: first, the wood to be dried is placed into the interior of the box 10 through the opening 11 on one side of the box 10; after the wood is placed, the opening 11 is sealed using the sealing component 20 to ensure the sealing of the interior of the box 10 and prevent microwave leakage and outside air from entering; in order to ensure that the wood remains stable during the drying process and reduce damage caused by the movement of the wood, the wood is compressed by the compression component 30 installed on the box 10; after the drying element 52 is started, the microwave generator heat-transmitting channel 53 directly acts on the wood inside the box 10; because the moisture in the wood has strong microwave absorption properties, the high temperature can be quickly absorbed by the water molecules, causing the water molecules to quickly heat and evaporate, thereby achieving the purpose of drying the wood; because the microwave generator is installed on the support plate 510, the microwave generator can also dissipate heat through the heat dissipation holes 511 on the support plate 510 during the process of heating the interior of the box 10. At the same time, the air outlet component 40 installed on the box 10 continuously discharges the heated moisture in the box, further ensuring the drying effect.

[0036] Compared with the prior art, the microwave drying oven of the present invention can ensure that the wood remains stable during the drying process through the cooperation of the drying member 52 and the pressing member, reduce damage caused by the movement of the wood, and improve the drying effect; the sealing of the interior of the box body 10 can be ensured by the closing component 20, preventing microwave leakage and outside air from entering, thereby improving safety and drying effect; the heat dissipation holes 511 on the support plate 510 can effectively dissipate heat, avoid damage to the microwave generator due to overheating, and extend the service life of the equipment; by adjusting the pressing component 30 and the air outlet component 40, it can adapt to wood of different sizes and shapes, thereby improving the versatility and adaptability of the equipment.

[0037] Please refer to Figure 2 and Figure 3 The microwave drying oven also includes a sensing assembly 60 mounted on the fixing member 51. The sensing assembly 60 includes a sensing element mounted on the fixing member 51 and a sensing channel 62 mounted on the housing 10 relative to the sensing element. The sensing assembly monitors parameters such as temperature, humidity, and microwave intensity within the housing 10 in real time. This data allows for more precise control of the drying process, ensuring optimal drying conditions for the wood. Real-time monitoring allows for timely adjustment of drying parameters, such as microwave intensity and drying time, to improve drying efficiency. For example, if the sensing assembly 60 detects a high moisture content in a particular area of ​​the wood, the microwave intensity in that area can be increased to accelerate drying. Real-time monitoring prevents overdrying of the wood, which not only wastes energy but can also cause the wood to become brittle and lose strength. The sensing assembly 60 allows for timely adjustment of parameters to ensure the wood reaches the desired drying level. The sensing assembly 60 monitors changes in the wood's temperature and humidity, allowing for timely adjustment of the pressure of the pressing assembly 30 to minimize movement and damage during the drying process. This helps preserve the integrity and quality of the wood.

[0038] The sensing components include a temperature sensor 610 mounted on the fixing member 51, a humidity sensor 611 mounted on the fixing member 51, and a microwave power sensor 612 mounted on the fixing member 51. They can monitor the temperature changes inside the box 10 in real time to ensure that the wood is dried within a suitable temperature range. Too high or too low a temperature may affect the drying effect and the quality of the wood; the humidity inside the box 10 can be monitored in real time to help adjust the drying parameters and ensure that the wood is dried under optimal humidity conditions to avoid being too wet or too dry; the microwave power can be monitored in real time to ensure that the intensity of microwave heating is within an appropriate range to avoid adverse effects of too strong or too weak microwaves on the wood; through real-time monitoring and feedback, the drying process can be controlled more accurately to ensure that the wood is in the best condition at every stage of the drying process, thereby improving the drying effect; the sensor can detect the temperature and humidity at different locations, and adjust the microwave power and the pressure of the pressing assembly 30 in time to ensure uniform drying inside and outside the wood and reduce the risk of cracking and deformation; through feedback from the temperature and humidity sensor 611, the drying parameters can be adjusted in time to prevent the wood from being over-drying, becoming brittle, and losing strength; real-time monitoring can promptly detect and deal with abnormal conditions of the wood during the drying process, reduce the movement and damage of the wood, and protect the integrity and quality of the wood.

[0039] The microwave drying oven further comprises a pouring nozzle 70 mounted on the fixing member 51 ; a spraying port 71 is provided on the box body 10 opposite to the pouring nozzle 70 ; the pouring nozzle 70 is provided to extend from one side of the spraying port 71 toward the inside of the box body 10 . When the heating element heats the wood, when the temperature of the wood is too high, the temperature sensor 610 transmits a signal to the pouring nozzle 70, and the pouring nozzle 70 can evenly spray the liquid on the surface and inside of the wood. Spraying liquid (such as water or coolant) through the pouring nozzle 70 can quickly reduce the temperature of the wood and prevent damage caused by overheating of the wood; excessive temperature can cause deformation and cracking of the wood, and timely spraying of coolant can reduce these phenomena and protect the integrity and quality of the wood; by spraying liquid, the temperature distribution inside the wood can be adjusted to ensure a more uniform heating process and reduce problems caused by temperature gradients; overheating of wood may cause a fire, and spraying coolant can effectively prevent the occurrence of fire and improve the safety of the equipment; excessive temperature will not only damage the wood, but also damage the box 10 and the heating element. Spraying coolant can protect the equipment and extend its service life.

[0040] Multiple drying elements 52 are mounted in a linear array on the fixing element 51. Multiple heat-transmitting channels are also provided, each located on the housing 10 opposite the drying elements 52. The linear array of drying elements 52 ensures uniform distribution of the wood within the housing 10, preventing localized concentration and thus improving drying uniformity. Multiple heat-transmitting channels correspond to each drying element 52, ensuring air circulation around each drying element 52 and preventing localized airflow obstruction, further improving drying uniformity. Multiple drying elements 52 can operate simultaneously, providing multi-point microwave heating, accelerating the wood drying process and improving drying efficiency. Multiple heat-transmitting channels accelerate moisture removal, reduce moisture accumulation within the housing 10, and increase drying speed. Multi-point heating more efficiently utilizes microwave energy, reducing energy waste and improving energy efficiency. Multiple microwave power sensors 612 can be used to individually control the microwave power of each drying element 52, adjusting it according to its actual needs and avoiding unnecessary energy consumption.

[0041] Please refer to Figure 1 and Figure 3 The closing assembly 20 includes a closing member 21 for closing the opening 11, a sealing member 22 installed on the box body 10 on one side of the opening 11, a connecting cantilever 23 with one end installed on the box body 10 and the other end installed on the closing member 21, and a connecting plate 24 installed on the closing member 21. In this embodiment, the sealing member 21 is a sealing strip. The combination of the closing member 21 and the sealing member 22 can ensure that the opening 11 is tightly closed, prevent microwave leakage and outside air from entering, and improve the sealing of the drying box; the sealing member 22 can effectively prevent external dust and pollutants from entering the interior of the box body 10, and keep the environment inside the box clean and dry; the structure of the closing assembly 20 can effectively prevent microwave leakage and ensure the safety of the operator; the structure of the connecting cantilever 23 and the connecting plate 24 can ensure that the closing member 21 is firmly fixed during operation, prevent accidental opening, and further improve safety; the structure of the connecting cantilever 23 and the connecting plate 24 allows the closing member 21 to be easily opened and closed, improving the convenience of operation; the structure of the connecting cantilever 23 usually allows the operator to complete the switch operation with one hand, improving work efficiency.

[0042] Please refer to Figure 4The closure member 21 includes a fixed plate 210 mounted on the housing 10, a connecting rod 211 rotatably mounted on the fixed plate 210, and a rotating locking portion 212 threadedly connected to the connecting rod 211. In this embodiment, the rotating locking portion 212 is a nut that cooperates with the connecting rod 211. The combination of the fixed plate 210, the connecting rod 211, and the rotating locking portion 212 can provide multi-point locking, ensuring a tight connection between the closure member 21 and the housing 10 and improving the sealing performance. The structure of the rotating locking portion 212 can ensure that the closure member 21 will not accidentally loosen or open during operation, thereby enhancing the reliability of the equipment. Through multiple locking, microwave leakage can be effectively prevented, ensuring the safety of the operator. The closure member 21 can ensure that the heat in the housing 10 does not dissipate, reducing energy loss and improving energy efficiency. The structure of the rotating locking portion 212 allows the operator to quickly lock and unlock the closure member 21, improving the convenience of operation. By rotating the locking portion 212, the operator can complete the locking and unlocking operations with one hand, thereby improving work efficiency.

[0043] The pressing assembly 30 includes a hydraulic cylinder (not shown in the figure) mounted on the box 10, and a pressure plate (not shown in the figure) mounted on the driving rod of the hydraulic cylinder. The hydraulic cylinder can provide stable and uniform pressure, ensuring that the pressure applied by the pressure plate on the wood is evenly distributed, avoiding excessive or insufficient local pressure; by adjusting the pressure of the hydraulic cylinder, the pressure of the pressure plate can be flexibly adjusted according to the type of wood and drying requirements, thereby improving the pressing effect; the pressure plate can firmly fix the wood, preventing the wood from moving during the drying process, ensuring the stability of the wood during the drying process; by applying pressure evenly, the deformation and cracking of the wood during the drying process can be reduced, improving the uniformity of drying; the pressure plate can ensure that the wood is firmly fixed in the box 10, preventing the wood from popping out under the action of high temperature and microwaves, and improving operational safety; the uniform pressure can reduce the irregular movement of the wood during the drying process, avoiding impact and damage to the equipment.

[0044] Please refer to Figure 2 and Figure 3The microwave drying oven also includes a support rack 80 mounted on the box body 10 for supporting and placing the wood. There are two support racks 80, which are placed parallel to the box body 10. The two parallel support racks 80 can ensure that the wood is evenly distributed within the box body 10, reducing the deviation and tilt of the wood during the drying process. The parallel support racks 80 can provide stable support to prevent the wood from sliding or shifting due to microwave vibration during the heating process. The two support racks 80 can ensure that the wood is evenly placed within the box body 10, so that each piece of wood can be evenly heated, reducing uneven drying caused by temperature gradients. The parallel support racks 80 can leave sufficient space to ensure uniform circulation of air and microwaves within the box body 10, further improving the drying effect. The two support racks 80 can share the weight of the wood, preventing deformation or damage of a single support rack 80 due to excessive load, thereby improving the overall load capacity. The parallel support racks 80 can provide more placement space, allowing more wood to be processed simultaneously, thereby improving production efficiency.

[0045] The microwave drying oven also includes a drainage pipe 90 installed on the box body 10 between the support frames 80. The drainage pipe 90 is arranged to communicate with the box body 10, and the end surface of the drainage pipe communicating with the box body 10 is arranged to be level with the horizontal plane of the box body 10. The structure of the drainage pipe 90 can effectively drain condensed water from the box body 10, preventing moisture from accumulating in the box body 10 and affecting the drying effect; timely drainage of condensed water can prevent moisture from flowing back or seeping into the wood, preventing the wood from being contaminated or becoming damp again; the structure of the drainage pipe 90 can ensure that the moisture in the box body 10 is drained in a timely manner, reducing moisture retention and contributing to uniform drying of the wood; timely drainage can accelerate the drying process of the wood, shorten the drying time, and improve production efficiency; the structure of the drainage pipe 90 can ensure that the moisture is drained in a timely manner, reducing moisture in the box body 10, avoiding moisture interference with microwaves, and improving the safety and efficiency of microwave use; timely drainage of condensed water can prevent corrosion of metal parts inside the box body 10 due to long-term contact with moisture, thereby extending the service life of the equipment.

[0046] Please refer to Figures 1 to 4 The present invention relates to a microwave drying method for solid wood, comprising the following steps: Step S1, loading and positioning: placing the solid wood board to be dried horizontally on two parallel support frames in a box, ensuring that the surface of the board faces the heat-transmitting channel; Step S2, closing and pressurizing: sealing the box opening with a closing component, activating the pressing component so that the pressing plate contacts the upper surface of the solid wood board with a pressure of 0.5-1.2 MPa; Step S3, microwave drying startup: activating multiple microwave generators arranged in a linear array, setting the initial power density to 0.8-1.5 W / cm 2, microwaves penetrate the solid wood board through the heat-transmitting channel; Step S4, dynamic control: the temperature sensor and humidity sensor are used to monitor the environment in the box in real time and control the temperature at 45-90°C; based on the feedback from the microwave power sensor, the power of each microwave generator is adjusted in each zone to make the moisture content gradient of the wood board ≤3% / cm; when the surface temperature of the wood board is detected to be greater than 180°C, the microwave power is automatically reduced by 10-30% and the pouring nozzle is started to spray ≤50mL / min·m 2 Atomized water; Step S5, seepage discharge: wood seepage is discharged through the drainage pipe between the support frames, and the height of the drainage outlet is flush with the bottom surface of the box; Step S6, termination of drying: when the moisture content in the center of the solid wood board drops to 8-12%, the microwave generation is stopped. By using microwave drying technology, the drying time of solid wood can be significantly shortened; microwaves can penetrate deep into the interior of the wood and heat it evenly, thereby reducing the problem of overheating of the surface while the interior remains undried, which is common in traditional drying methods; the pressure, temperature and humidity conditions set in the steps help prevent defects such as cracks and deformation in the wood during the drying process, maintaining the integrity and structural stability of the wood; through the dynamic control process (step S4), the microwave power can be adjusted according to the real-time state of the wood to ensure uniform moisture distribution while avoiding overheating, which is of great significance in ensuring processing accuracy and improving production efficiency; the entire drying process, from loading to monitoring to the final seepage discharge and drying termination, all adopts automated control technology, reducing manual intervention and improving production continuity and safety.

[0047] The above description merely represents the preferred technical solution of the present invention. While the description is relatively specific and detailed, it should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the spirit of the present invention, and the present invention is intended to encompass such modifications and variations.

Claims

1. A microwave drying oven for drying wood; characterized in that: The microwave drying oven includes a box body with an opening on one side, a closing assembly provided on the opening, a pressing assembly installed on the box body for pressing the wood in the box body, an air outlet assembly installed on the box body, and a drying assembly installed in the box body; the drying assembly includes a fixing member installed on an outer wall of one side of the box body, a drying member installed on the fixing member, and a heat-transmitting channel provided on the drying member relative to the box body; the fixing member includes a support plate installed on an outer wall of one side of the box body, and a plurality of heat dissipation holes provided on the support plate; the drying member is a microwave generator; the microwave drying oven also includes an induction assembly installed on the fixing member and a support frame installed on the box body for supporting and placing the wood.

2. The microwave drying oven according to claim 1, characterized in that The induction component includes an induction component installed on the fixing component and an induction channel installed on the induction component and arranged on the box body.

3. The microwave drying oven according to claim 2, characterized in that: The sensing component includes a temperature sensor installed on the fixing component, a humidity sensor installed on the fixing component, and a microwave power sensor installed on the fixing component.

4. The microwave drying oven according to claim 3, characterized in that: The microwave drying box further comprises a pouring nozzle mounted on the fixing member; a spraying port is provided on the box body opposite to the pouring nozzle; the pouring nozzle is arranged to extend from one side of the spraying port into the box body.

5. The microwave drying oven according to claim 1, characterized in that: There are multiple drying elements, and the multiple drying elements are installed on the fixing element in a linear array. There are also multiple heat-transmitting channels, and the multiple heat-transmitting channels are respectively arranged on the box body opposite to the drying elements.

6. The microwave drying oven according to claim 1, characterized in that: The closing assembly includes a closing piece for closing the opening, a sealing piece installed on the box body at one side of the opening, a connecting cantilever with one end installed on the box body and the other end installed on the closing piece, and a connecting plate installed on the closing piece.

7. The microwave drying oven according to claim 6, characterized in that: The closing member comprises a fixing plate mounted on the box body, a connecting rod rotatably mounted on the fixing plate, and a rotation locking portion threadedly connected to the connecting rod.

8. The microwave drying oven according to claim 1, characterized in that: The pressing assembly includes a hydraulic cylinder installed on the box body and a pressing plate installed on the driving rod of the hydraulic cylinder.

9. The microwave drying oven according to claim 1, characterized in that: There are two support racks, which are placed parallel to the box body; the microwave drying box also includes a drainage pipe installed on the box body between the support racks, and the drainage pipe is arranged to be connected to the box body, and the end face of the drainage pipe connected to the box body is arranged to be level with the horizontal plane of the box body.

10. A microwave drying method for solid wood, characterized by: The microwave drying oven according to any one of claims 1 to 9, wherein the method comprises the following steps: Step S1, loading and positioning: Place the solid wood board to be dried horizontally on two parallel support frames in the box, ensuring that the surface of the board faces the heat-transmitting channel; Step S2, closing and pressurizing: sealing the box opening by the closing assembly, activating the pressing assembly so that the pressing plate abuts against the upper surface of the solid wood board at a pressure of 0.5-1.2 MPa; Step S3, microwave drying start: start multiple microwave generators arranged in a linear array and set the initial power density to 0.8-1.5 W / cm 2 , microwaves penetrate the solid wood board through the heat transmission channel; Step S4, dynamic control: The temperature sensor and humidity sensor are used to monitor the environment in the box in real time and control the temperature at 45-90℃; Based on the feedback from the microwave power sensor, the power of each microwave generator is adjusted in each zone to make the moisture content gradient of the wood board ≤3% / cm; When the surface temperature of the wood board is detected to be greater than 180℃, the microwave power is automatically reduced by 10-30% and the pouring nozzle is started to spray ≤50mL / min·m 2 of atomized water; Step S5, drainage of seepage: the wood seepage is discharged through the drainage pipe between the support frames, and the height of the drainage outlet is flush with the bottom surface of the box; Step S6, terminating the drying: stopping the microwave generation when the moisture content in the center of the solid wood board drops to 8-12%.

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