A blast electric heating constant temperature drying oven

Abstract

The application provides a blast electric heating constant-temperature drying box and relates to the technical field of drying boxes.The blast electric heating constant-temperature drying box comprises a drying box main body, the drying box main body comprises an outer shell and an inner container, the outer shell and the inner container form a cavity, the cavity is provided with an equipment part located at the top, an air supply part located at the left side and an air return part located at the right side, a plurality of side air holes are formed in the left side and the right side of the inner container and are in communication with the air supply part and the air return part, and the blast electric heating constant-temperature drying box further comprises a blast device, a heating device, an adjusting assembly, an electromagnetic control device and a bottom air supply device. The upper layer area, the middle layer area and the lower layer area are arranged to balance the temperature in the drying box, prevent the temperature from being uneven in the drying box and the like, and the blast electric heating constant-temperature drying box can meet the demand of large-scale industrial drying.

Description

Technical Field

[0001] This invention relates to the field of drying oven technology, and in particular to a blower-driven, electrically heated, constant-temperature drying oven. Background Technology

[0002] A blower-heated constant temperature drying oven, often simply called a blower drying oven or oven, is a commonly used piece of equipment in laboratories and industries. It is mainly used for drying samples, heating materials, and conducting experiments that require constant temperature conditions.

[0003] In the production and preparation of fire-fighting equipment, a blower-cooled constant temperature drying oven is required for coating curing, component bonding and heat treatment.

[0004] Chinese Patent Application No. 202111547911.2 discloses an electric heating constant temperature forced-air drying oven, including a drying oven body, a first rotating assembly, and several trays. The first rotating assembly is installed inside the drying oven body and close to the middle of the drying oven body. Several trays are connected to the first rotating assembly for driving the trays to rotate. Several trays for placing products to be dried are arranged in a row along the height direction of the drying oven body. The top and bottom surfaces of the drying oven body are provided with first blowers. The air outlets of the first blowers are connected to the top or bottom of the drying oven body. Two opposite inner surfaces of the drying oven body are provided with electric heating plates. Two opposite outer surfaces of the drying oven body are provided with second blowers. The two electric heating plates are respectively close to the two second blowers. The second blowers are close to the electric heating plates on the same side. The air outlets of the second blowers are connected to the side of the drying oven body. A constant pressure valve is provided at the top of the drying oven body, which has the effect of improving the uniformity of heating and drying.

[0005] Chinese Patent Application No. 202020440279.6 discloses an electric drying oven. The oven body has a heater at its rear end and a door at its front end, hinged to the oven body. A heating plate with evenly distributed heat dissipation holes is located at the bottom of the oven body. A sliding support is also provided inside the oven body, with a fixing mesh and first rollers on the sliding support. Slide rails are provided between the left and right sides of the heating plate and the side walls of the oven body. The first rollers are rotatably connected to the slide rails. The sliding support allows for easy removal of items after drying, reducing the risk of burns to workers.

[0006] Large industrial forced-air drying ovens using technologies similar to those described above also have the following problems: 1. Due to the structural limitations of conventional industrial blower drying ovens, large drying ovens generally adopt a one-sided air outlet and one-sided air return system, which eventually forms a gas circulation at the top of the oven. This can cause uneven heating of the materials. Existing blower drying ovens have also made structural optimizations to address this issue, but these are basically small drying ovens. Due to the size of industrial drying ovens, the structural optimization of small drying ovens with unilateral airflow is not suitable for large equipment.

[0007] 2. In the drying of fire-fighting powder, sometimes it is necessary to place the material on a multi-layer shelf and then push the shelf into the drying box for drying. When using a side-exit airflow method to dry the material on the shelf, the effect is not optimal, and there are drying dead corners, especially the bottom of the material and the leeward side. Summary of the Invention

[0008] To address the above problems, this invention provides a blower-heated constant temperature drying oven, which has advantages such as more uniform temperature inside the drying oven and better air outlet effect on both sides of the bottom of the oven.

[0009] The technical solution is a blower-heated constant temperature drying oven, comprising a drying oven body, an outer shell, and an inner liner, and further comprising an equipment section, an air supply section, and a return air section. Multiple side air holes communicating with the air supply section and the return air section are respectively opened on the left and right sides of the inner liner. It also includes an adjustment assembly disposed within the air supply section. The adjustment assembly includes two vertically distributed adjustment units, each including a baffle that slides vertically and vertically with the inner liner. The baffle has multiple through holes matching the side air holes. The adjustment unit also includes multiple vertically distributed air guides, each including a rotating shaft and an air guide plate. The rotating shaft rotates with the outer shell. The air guide plate is connected to the baffle plate, which has multiple equidistant air guide ports. The length of the air guide ports on the multiple air guide plates increases in a gradient from top to bottom. A curved rod is provided between the baffle plate and the air guide strip. One end of the curved rod is fixedly connected to the rotating shaft, and the other end of the curved rod has a waist-shaped sliding hole. A connecting rod is fixed to the end of the baffle plate near the curved rod, and the connecting rod is slidably connected to the waist-shaped sliding hole. A synchronizer is provided between the air guide plates in the same adjustment unit. The synchronizer includes a synchronizer rod and connecting blocks at both ends of the synchronizer rod. The two connecting blocks are fixedly connected to the upper and lower adjacent air guide plates respectively, and the synchronizer rod is rotatably connected to the two connecting blocks.

[0010] Preferably, it further includes an electromagnetic control device, which is disposed within the air supply section and located on one side of the baffle. The electromagnetic control device includes two vertically distributed electromagnetic control units for controlling the vertical movement of the baffle. The electromagnetic control unit includes a housing with a through-hole matching the connecting rod. The connecting rod is located within the through-hole. The housing has a movable cavity located on one side of the through-hole. An electromagnetic component is fixed within the movable cavity. Multiple vertically distributed insertion holes are through-holes on the side of the through-hole near the movable cavity. Insert plates are slidably connected within the insertion holes. A left-right sliding reset plate is disposed within the movable cavity. Multiple through slots matching the insertion plates are provided on the reset plate. A protrusion is fixed at the end of each insertion plate away from the insertion hole. The reset plate is connected to the movable cavity via an elastic element. A connecting ring is fixedly connected to one side of the housing.

[0011] Preferably, the device further includes a blower, which is located inside the equipment section and is used to provide power for air circulation within the chamber; a heating device, which is located on one side of the blower unit and close to the air supply section, and is used to heat the gas; and a bottom air supply device, which is located at the bottom of the air supply section. The bottom air supply device and two adjusting units divide the air supply section into an upper zone, a middle zone, and a lower zone. The two adjusting units are located in the upper zone and the middle zone, respectively. A partition is provided between the upper zone and the middle zone, and the height of the partition is at least the sum of the diameters of the two side air holes.

[0012] Preferably, three temperature sensors, namely a first temperature sensor, a second temperature sensor, and a third temperature sensor, are fixed on the inner wall of the inner liner near the return air section. The first temperature sensor, the second temperature sensor, and the third temperature sensor correspond to the upper layer, the middle layer, and the lower layer, respectively.

[0013] Preferably, the two connecting rings are coaxially fixed with the same moving rod inside, the top of the housing is fixed with a first oil cylinder, one end of the moving rod that passes through the inside of the first oil cylinder is coaxially fixed with a piston plate, the piston plate slides up and down in the first oil cylinder, the top of the housing is provided with an oil storage cylinder and a servo motor, the oil outlet of the oil storage cylinder is provided with an electromagnetic three-way valve, and the oil inlet of the first oil cylinder is connected to the electromagnetic three-way valve through a hose.

[0014] Preferably, the oil reservoir has a first piston rod inside, the first piston rod has a thread, the first piston rod is threaded to the oil reservoir, the first piston rod has a polygonal connecting hole, a polygonal connecting rod is slidably connected in the polygonal connecting hole, and a connecting shaft is coaxially fixed to the end of the polygonal connecting rod away from the first piston rod, the connecting shaft is coaxially fixed to the input end of the servo motor.

[0015] Preferably, the bottom of the inner liner is provided with a plurality of air grooves distributed at equal intervals front and back, and the bottom of the inner liner is provided with a plurality of air outlets communicating with the air grooves. The bottom air supply device includes an air guide plate fixed to the bottom of the air supply section, and the air guide plate is provided with a flow channel matching the air grooves.

[0016] Preferably, the bottom of the inner liner is divided into a sparse area on the left and a dense area on the right, and the distribution density of the air outlets in the sparse area is less than that in the dense area.

[0017] Preferably, it also includes a bottom adjustment device, which includes multiple sliding plates located inside the air slot. A fourth temperature sensor and a fifth temperature sensor are respectively provided on the left and right sides of the bottom of the inner liner. Multiple secondary holes matching the air outlet are opened on the left half of the sliding plate, and a connecting groove is opened on the right half of the sliding plate. A positioning rod is fixedly connected to the right side of the sliding plate. The same mounting plate is fixed to one end of the multiple positioning rods that pass through the return air section. A second oil cylinder is provided in the return air section. A second piston rod that slides left and right is provided in the second oil cylinder. A positioning plate is fixed to one end of the second piston rod that passes through the second oil cylinder. The positioning plate is fixedly connected to the mounting plate. The oil inlet end of the second oil cylinder is connected to an electromagnetic three-way valve through a hose.

[0018] Preferably, an inclined plate is fixedly connected to the bottom of the air trough, and the cross-sectional height of the inclined plate increases from left to right.

[0019] Compared with existing known technologies, the technical solution provided by this invention has the following significant advantages: 1. By setting up upper, middle and lower zones, three temperature sensors can monitor the return air temperature of the three zones in real time during the material drying process. When the return air temperature of one zone is lower than the temperature range of the other two zones, the temperature sensor will send a signal to the control box. The electromagnetic control component will drive the baffle of the corresponding zone to move, thereby balancing the temperature inside the drying box and preventing problems such as uneven temperature between the top and bottom of the drying box. It is suitable for large industrial drying boxes.

[0020] 2. Through the design of the waist-shaped hole, electromagnetic part, insertion hole, insertion plate and reset plate, the insertion plate can limit the connection rod at different heights in the waist-shaped hole, thereby realizing the staggered movement of the baffles in the upper and middle layers, making the side air volume of the upper and middle layers more adjustable.

[0021] 3. Through the design of air troughs, air outlets, air guide plates, and flow channels, when the third temperature sensor detects that the return air temperature of the lower zone is lower than the average temperature of the other two zones, the control box sends an electrical signal to the electromagnetic control components and other related equipment. At this time, the side air volume of the upper and middle zones decreases, and a large amount of hot gas is guided by the air guide plate and enters multiple air troughs through the flow channels, and finally sprayed out through the air outlets, which greatly reduces the drying dead zones of materials, especially for materials placed on shelves.

[0022] 4. By setting up sparse and dense zones, when hot air passes through the sparse zone on the left, the airflow attenuation on the right side is significantly improved due to the smaller number of air outlets, which to some extent improves the airflow effect at the bottom of the drying chamber.

[0023] 5. Through the setting of the slide plate, fourth temperature sensor, fifth temperature sensor, second oil cylinder and positioning plate, when the fifth temperature sensor detects that the air outlet temperature on the right side is significantly lower than the air outlet temperature on the left side, the control box controls the solenoid three-way valve to conduct the circuit with the second oil cylinder, the oil circuit between the first oil cylinder and the oil storage cylinder is closed, the servo motor starts, and the hydraulic oil in the oil storage cylinder will enter the second oil cylinder. The second piston rod drives the mounting plate to move. At this time, the air outlet on the left side will be gradually blocked, thereby realizing the adjustment of the air volume at the bottom of the drying chamber and greatly improving the temperature uniformity of the left and right sides of the chamber. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0025] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0026] Figure 3 This is a three-dimensional schematic diagram of the first temperature sensor and its connector in this invention.

[0027] Figure 4 This is a three-dimensional schematic diagram of the air-exhaust plate and its connecting parts in this invention.

[0028] Figure 5 This is a three-dimensional schematic diagram of the air guide strip and its connecting parts in this invention.

[0029] Figure 6 This is the present invention. Figure 5 Enlarged schematic diagram of the structure at point C.

[0030] Figure 7 This is a three-dimensional schematic diagram of the synchronizer in this invention.

[0031] Figure 8 This is a three-dimensional schematic diagram of the electromagnetic component and its connecting parts in this invention.

[0032] Figure 9This is a schematic diagram of the cooperation between the reset plate and the insertion plate in this invention.

[0033] Figure 10 This is the present invention. Figure 1 A magnified schematic diagram of the structure at point A in the middle.

[0034] Figure 11 This is a schematic diagram of the air groove and air outlet in this invention.

[0035] Figure 12 This is a three-dimensional schematic diagram of the skateboard and its connecting parts in this invention.

[0036] Figure 13 This is the present invention. Figure 2 Enlarged schematic diagram of the structure at point B.

[0037] Explanation of the labels in the diagram: 1. Drying oven body; 2. Outer shell; 3. Inner liner; 4. Equipment section; 5. Air supply section; 6. Air return section; 7. Baffle; 8. First temperature sensor; 9. Second temperature sensor; 10. Third temperature sensor; 11. Air guide strip; 12. Rotating shaft; 13. Air guide plate; 14. Crank rod; 15. Oval sliding hole; 16. Connecting rod; 17. Synchronizer; 18. Synchronizing rod; 19. Connecting block; 20. Housing; 21. Oval hole; 22. Electromagnetic part; 23. Insertion hole; 24. Insert plate; 25. Reset plate; 26. Connecting ring; 27. Moving rod; 28. First oil cylinder; 29. ​​Oil reservoir; 30. Servo motor; 31. Solenoid three-way valve; 32. First piston rod; 33. Polygonal connecting rod; 34. Air groove; 35. Air outlet; 36. Air guide plate; 37. Flow channel; 38. Slide plate; 39. Fourth temperature sensor; 40. Fifth temperature sensor; 41. Secondary hole; 42. Connecting groove; 43. Mounting plate; 44. Second oil cylinder; 45. Positioning plate; 46. Inclined plate. Detailed Implementation

[0038] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Depend on Figures 1 to 2 The present invention includes a drying oven body 1, which includes an outer shell 2 and an inner liner 3. The outer shell 2 and the inner liner 3 form a cavity. The cavity contains an equipment section 4 located at the top, an air supply section 5 on the left side, and a return air section 6 on the right side. The inner liner 3 has multiple side air holes that communicate with the air supply section 5 and the return air section 6 through its left and right sides, thereby forming a reciprocating circulation channel inside the oven body and the cavity. The above are all existing structures of existing drying ovens, which will not be described in detail here. The oven also includes a blower, a heating device, an adjustment component, an electromagnetic control device, and a bottom air supply device.

[0040] The blower is located inside the equipment section 4 and is used to provide power for air circulation inside the box. The blower uses a blower to promote air flow inside the box and form convection.

[0041] The heating device is located on one side of the blower unit and close to the air supply section 5. The heating device uses an electric heating tube with a heating wire inside. When air passes through the electric heating tube, the temperature of the gas rises, thereby heating the gas in multiple cycles.

[0042] The adjustment component is located inside the air supply section 5. The adjustment component includes two adjustment units distributed vertically. Each adjustment unit includes a baffle 7 that is slidably connected to the inner liner 3 vertically. In this embodiment, a vertical groove is provided on the side wall of the inner liner 3. A slider matching the groove is fixed on the baffle 7. A plurality of through holes matching the side air holes are provided on the baffle 7.

[0043] The electromagnetic control device is installed inside the air supply section 5 and located on one side of the baffle 7. The electromagnetic control device includes two electromagnetic control units distributed vertically to control the vertical movement of the baffle 7. When using the electromagnetic control device, the corresponding electromagnetic control units can be controlled separately to achieve step-by-step adjustment.

[0044] Bottom air supply device, located at the bottom of air supply section 5, is used to guide gas out from the bottom of the box. The purpose of setting the bottom air supply device is to improve the drying effect of materials in the box, especially materials placed on multi-layer shelves.

[0045] refer to Figure 2 and Figure 3 As shown, since large drying ovens generally use one-sided air outlet and one-sided air return, and finally form a gas circulation through the top of the oven, it will cause uneven heating of the material. Existing forced-air drying ovens have also made structural optimizations to address this problem, but they are basically small drying ovens. Due to the size of industrial drying ovens, the structural optimization of single-sided airflow in small drying ovens is not suitable for large equipment. To address the above problem, the bottom air supply device and two adjustment units divide the air supply section 5 into an upper layer, a middle layer, and a lower layer. The two adjustment units are located in the upper layer and the middle layer, respectively, and a partition is set between the upper layer and the middle layer. It should be noted that the partition is a blank area used to distinguish the upper layer and the middle layer. There are no side air holes on the partition. The height of the partition is at least the sum of the diameters of the two side air holes to prevent the two baffles 7 from colliding when moving up and down.

[0046] Three temperature sensors, namely a first temperature sensor 8, a second temperature sensor 9, and a third temperature sensor 10, are fixed on the inner wall of the inner liner 3 near the return air section 6. These sensors correspond to the upper, middle, and lower zones, respectively. A control box is located on the side of the outer shell 2, containing a control unit. The control box is electrically connected to all power sources, and the three temperature sensors are electrically connected to the control box. Through the upper, middle, and lower zones, the three temperature sensors can monitor the return air temperature of the three zones in real time during the material drying process. When one temperature sensor detects that the return air temperature of its zone is lower than the temperature range of the other two zones, it sends a signal to the control box for subsequent operation.

[0047] refer to Figures 4 to 6 As shown, the adjustment unit also includes multiple air guide strips 11 evenly distributed vertically. Each air guide strip 11 includes a rotating shaft 12 and an air guide plate 13. One end of the air guide plate 13 is fixedly connected to the rotating shaft 12, and the rotating shaft 12 is rotatably connected to the outer casing 2. Multiple air guide ports are provided on the air guide plate 13 at equal intervals. The length of the air guide ports on the multiple air guide plates 13 increases in a gradient from top to bottom. The purpose of limiting the length of the air guide ports is to ensure that the air volume is balanced in the same layer area. When the gas enters the air supply section 5 through the equipment section 4, after passing through each layer area, some of the gas will pass through the side air holes under the guidance of the air guide plate 13 and enter the material drying area. In this embodiment, the initial tilt angle of the air guide plate 13 relative to the outer shell 2 is 40 degrees. As the baffle 7 descends, the tilt angle gradually decreases. A curved rod 14 is provided between the baffle 7 and the air guide strip 11. One end of the curved rod 14 is fixedly connected to the rotating shaft 12, and the other end of the curved rod 14 is provided with a waist-shaped sliding hole 15. A connecting rod 16 is fixed to one end of the baffle 7 near the curved rod 14. The connecting rod 16 is slidably connected to the waist-shaped sliding hole 15. When the baffle 7 moves downward, the curved rod 14 will drive the rotating shaft 12 to rotate. At this time, the tilt angle of the air guide plate 13 will gradually decrease.

[0048] refer to Figure 7 As shown, in order to make the angle change of the air guide plates 13 in the same layer area consistent, a synchronizer 17 is provided between the air guide plates 13 in the same adjustment unit. The synchronizer 17 includes a synchronizer rod 18 and connecting blocks 19 at both ends of the synchronizer rod 18. The connecting blocks 19 are provided with slots with the same thickness as the air guide plates 13. The two connecting blocks 19 are respectively engaged with the upper and lower adjacent air guide plates 13, or they can be fixed by screws. The synchronizer rod 18 is rotatably connected to the two connecting blocks 19.

[0049] To ensure that the side airflow of the middle zone is basically the same as that of the upper zone, the length of the air guide plate 13 in the middle zone is greater than that in the upper zone.

[0050] refer to Figure 8 and Figure 9 As shown, to further supplement the description of the movement mode of the baffle 7 and the structure of the electromagnetic control unit, the electromagnetic control unit includes a housing 20. A waist-shaped hole 21 matching the connecting rod 16 is provided through the housing 20. The height of the waist-shaped hole 21 is greater than the vertical movement distance of the baffle 7. The connecting rod 16 is located inside the waist-shaped hole 21. A movable cavity is provided inside the housing 20 on one side of the waist-shaped hole 21. An electromagnetic part 22 is fixed inside the movable cavity and is electrically connected to the control box. Multiple vertically distributed insertion holes 23 are provided through the side of the waist-shaped hole 21 near the movable cavity. Insert plates 24, made of magnetic material, are slidably connected inside the insertion holes 23. A left-right sliding reset plate 25 is provided inside the movable cavity. Multiple through slots matching the insertion plates 24 are provided on the reset plate 25. A protruding plate is fixed to the end of each insertion plate 24 away from the insertion holes 23. The reset plate 25 is connected to the movable cavity by an elastic element. The movement is achieved through the waist-shaped hole 21 and the electromagnetic... The device includes components such as part 22, insertion hole 23, insertion plate 24, and reset plate 25. When the electromagnetic part 22 is energized, multiple insertion plates 24 are simultaneously subjected to a strong repulsive force. The multiple insertion plates 24 drive the reset plate 25 to overcome the elastic force of the elastic element and move towards the side of the waist-shaped hole 21. The connecting rod 16 is limited within the waist-shaped hole 21. When the electromagnetic part 22 is de-energized, the reset plate 25 drives the multiple insertion plates 24 to reset under the action of the elastic element. The advantage of this configuration is that the insertion plates 24 can limit the connecting rod 16 at different heights within the waist-shaped hole 21. For example, in this embodiment, when the baffle 7 in the upper layer moves down by half the diameter of the side air hole, the electromagnetic control unit below then limits the connecting rod 16. The baffle 7 in the middle layer moves down again by half the diameter of the side air hole, and all the side air holes in the upper layer are blocked. Only half of the air volume is retained in the middle layer, and most of the gas will enter the lower layer.

[0051] refer to Figure 10 As shown, to supplement the moving structure of the electromagnetic control unit, a connecting ring 26 is fixedly connected to one side of the housing 20. The same moving rod 27 is coaxially fixed inside the two connecting rings 26. A first oil cylinder 28 is fixed to the top of the housing 2. A piston plate is coaxially fixed to one end of the moving rod 27 that passes through the inside of the first oil cylinder 28. The piston plate slides up and down inside the first oil cylinder 28. An oil storage cylinder 29 and a servo motor 30 are provided on the top of the housing 2. An electromagnetic three-way valve 31 is provided at the oil outlet end of the oil storage cylinder 29. The oil inlet end of the first oil cylinder 28 is connected to the electromagnetic three-way valve 31 through a hose.

[0052] The oil reservoir 29 has a first piston rod 32 inside, which is threaded and threaded to the oil reservoir 29. The first piston rod 32 has a polygonal connecting hole, and a polygonal connecting rod 33 is slidably connected in the polygonal connecting hole. The end of the polygonal connecting rod 33 away from the first piston rod 32 is coaxially fixed to a connecting shaft, which is coaxially fixed to the input end of the servo motor 30. With the first oil cylinder 28, the moving rod 27, the electromagnetic three-way valve 31, and the servo motor 30, the moving rod 27 can move up and down with higher precision due to the double cooperation of the servo motor 30 and the threaded connection. When the corresponding electromagnetic control unit and the connecting rod 16 are limited, the up and down movement of the moving rod 27 will drive the baffle 7 to move up and down.

[0053] refer to Figure 2 and Figure 11 As shown, further details regarding the cooperation structure between the bottom air supply device and the inner liner 3 are provided. The bottom of the inner liner 3 has multiple air grooves 34 evenly distributed front and rear. The reason for setting the air grooves 34 is mainly to ensure that the bottom of the inner liner 3 has a certain load-bearing capacity. Therefore, large-scale hollow structures should be avoided at the bottom of the inner liner 3. The bottom of the inner liner 3 has multiple air outlets 35 communicating with the air grooves 34. The bottom air supply device includes an air guide plate 36 fixed to the bottom of the air supply section 5. The air guide plate 36 has flow channels that match the air grooves 34. 37. Through the configuration of air troughs 34, air outlets 35, air guide plates 36, and flow channels 37, when the third temperature sensor 10 detects that the return air temperature of the lower layer is lower than the average temperature of the other two layers, the control box will send an electrical signal to the electromagnetic control components and other related equipment. At this time, the side air volume of the upper and middle layers decreases, and a large amount of hot gas is guided by the air guide plate 36 and enters multiple air troughs 34 through the flow channels 37, and finally sprays out through the air outlets 35, which greatly reduces the drying dead zones of materials, especially for materials placed on shelves.

[0054] refer to Figure 3 and Figure 11 As shown, considering the wind force attenuation problem when the gas passes through the air trough 34, the air volume on the right bottom is significantly less than that on the left, resulting in the bottom air outlet effect not reaching the optimal level. The bottom of the inner liner 3 is divided into a sparse area on the left and a dense area on the right. The distribution density of the air outlet holes in the sparse area is less than that in the dense area. Through the setting of sparse and dense areas, when hot air passes through the sparse area on the left, the wind force attenuation on the right is significantly improved due to the smaller number of air outlet holes, which to a certain extent improves the air outlet effect at the bottom of the drying chamber.

[0055] refer to Figure 2 , Figure 12 and Figure 13As shown, to further optimize the air outlet effect at the bottom of the drying oven, a bottom adjustment device is also included. This device includes multiple sliding plates 38 located inside the air duct 34. A fourth temperature sensor 39 and a fifth temperature sensor 40 are respectively installed on the left and right sides of the bottom of the inner liner 3 to monitor the temperature changes on the left and right sides when air is vented from the bottom of the oven. The fourth temperature sensor 39 and the fifth temperature sensor 40 are respectively connected to the control box via electrical signals. Multiple secondary holes 41 matching the air outlet are opened on the left half of the sliding plate 38, and a connecting groove 42 is opened on the right half of the sliding plate 38. A positioning rod is fixedly connected to the right side of the sliding plate 38. Multiple positioning rods extend through to one end of the return air section 6 and are fixed to the same mounting plate 43. A second hydraulic cylinder 44 is installed inside the return air section 6, and a second movable valve that slides left and right is installed inside the second hydraulic cylinder 44. The piston rod, with a positioning plate 45 fixed at one end of the second cylinder 44, is fixedly connected to the mounting plate 43. The oil inlet of the second cylinder 44 is connected to the solenoid three-way valve 31 via a hose. Through the slide plate 38, the fourth temperature sensor 39, the fifth temperature sensor 40, the second cylinder 44, and the positioning plate 45, when the fifth temperature sensor 40 detects that the air outlet temperature on the right side is significantly lower than that on the left side, the control box controls the circuit between the solenoid three-way valve 31 and the second cylinder 44 to be connected, the oil circuit between the first cylinder 28 and the oil storage cylinder 29 is closed, the servo motor 30 is started, and the hydraulic oil in the oil storage cylinder 29 will enter the second cylinder 44. The second piston rod drives the mounting plate 43 to move, at which time the air outlet on the left side will be gradually blocked, thereby adjusting the air volume at the bottom of the drying oven.

[0056] refer to Figure 2 As shown, considering that condensate may accumulate in the air groove 34 after the air outlet is opened at the bottom of the inner liner 3, the bottom of the air groove 34 is fixedly connected to the inclined plate 46. The cross-sectional height of the inclined plate 46 increases from left to right. When the condensate enters the air groove 34 through the air outlet, the condensate accumulates on the left side due to the slope setting. During the bottom air outlet stage, a large amount of hot air will dry the condensate.

[0057] In use, the present invention is as follows: First, the blower and heating device are activated to preheat the inside of the equipment, and then the material is pushed into the drying chamber body 1. Then, the first temperature sensor 8 to the third temperature sensor 10 monitor the upper, middle and lower zones respectively. When the third temperature sensor 10 detects that the return air temperature of the lower zone is lower than the average temperature of the other two zones, the control box sends an electrical signal to the electromagnetic control components of the upper zone or the upper and middle zones. When the electromagnetic part 22 is energized, the multiple insert plates 24 are simultaneously subjected to a strong repulsive force. The multiple insert plates 24 drive the reset plate 25 to overcome the elastic force of the elastic element and move towards the side of the waist-shaped hole 21. The connecting rod 16 is limited in the waist-shaped hole 21. When the electromagnetic part 22 is de-energized, the reset plate 25 drives the multiple insert plates 24 to reset under the action of the elastic element. The insert plates 24 can limit the connecting rod 16 at different heights in the waist-shaped hole 21.

[0058] At the same time, the servo motor 30 starts, and the hydraulic oil in the oil storage cylinder 29 enters the first oil cylinder 28. The moving rod 27 drives the corresponding baffle 7 to move downward, and the side air volume of the corresponding layer will change.

[0059] Secondly, when the side airflow in the upper and middle layers is greatly reduced, a large amount of hot gas will be guided by the air intake plate 36, enter the multiple air slots 34 through the flow channel 37, and finally be ejected from the air outlet 35.

[0060] Finally, regarding the airflow adjustment on both sides of the bottom, when the fifth temperature sensor 40 detects that the airflow temperature on the right side is significantly lower than that on the left side, the control box controls the circuit between the solenoid three-way valve 31 and the second oil cylinder 44 to be connected, the oil circuit between the first oil cylinder 28 and the oil storage cylinder 29 is closed, the servo motor 30 is started, and the hydraulic oil in the oil storage cylinder 29 will enter the second oil cylinder 44. The second piston rod drives the mounting plate 43 to move, at which point the air outlet on the left side will be gradually blocked, thereby achieving the adjustment of the airflow at the bottom of the drying oven.

[0061] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A blower-heated constant temperature drying oven, comprising a drying oven body (1), an outer shell (2), and an inner liner (3), characterized in that, It also includes an equipment section (4), an air supply section (5) and a return air section (6). The inner liner (3) has multiple side air holes that communicate with the air supply section (5) and the return air section (6) respectively on its left and right sides. It also includes an adjustment component, which is disposed in the air supply section (5). The adjustment component includes two adjustment units distributed vertically. The adjustment unit includes a baffle (7) that is slidably connected to the inner liner (3) vertically. The baffle (7) has multiple through holes that match the side air holes. The adjustment unit also includes multiple air guide strips (11) evenly distributed vertically. Each air guide strip (11) includes a rotating shaft (12) and an air guide plate (13). The rotating shaft (12) is rotatably connected to the outer shell (2). Multiple air guide ports are provided on the air guide plate (13) at equal intervals. The length of the air guide ports on the multiple air guide plates (13) increases in a gradient from top to bottom. A curved rod (14) is provided between the baffle (7) and the air guide strip (11). One end of the curved rod (14) is fixedly connected to the rotating shaft (12). The other end of the curved rod (14) is provided with a waist-shaped sliding hole (15). A connecting rod (16) is fixed to one end of the baffle (7) near the curved rod (14). The connecting rod (16) is slidably connected to the waist-shaped sliding hole (15). A synchronizer (17) is provided between the air guide plates (13) in the same adjustment unit. The synchronizer (17) includes a synchronizer rod (18) and connecting blocks (19) at both ends of the synchronizer rod (18). The two connecting blocks (19) are fixedly connected to the upper and lower adjacent air guide plates (13) respectively. The synchronizer rod (18) is rotatably connected to the two connecting blocks (19).

2. The blower-heated electric constant temperature drying oven according to claim 1, characterized in that, It also includes an electromagnetic control device, which is located inside the air supply section (5) and on one side of the baffle (7). The electromagnetic control device includes two electromagnetic control units distributed vertically to control the vertical movement of the baffle (7). The electromagnetic control unit includes a housing (20), on which a waist-shaped hole (21) matching the connecting rod (16) is opened through. The connecting rod (16) is located inside the waist-shaped hole (21). A movable cavity located on one side of the waist-shaped hole (21) is provided inside the housing (20). An electromagnetic part (22) is fixed inside the movable cavity. Multiple insertion holes (23) evenly distributed vertically are opened through the side of the waist-shaped hole (21) near the movable cavity. Insert plates (24) are slidably connected inside the insertion holes (23). A reset plate (25) that slides left and right is provided inside the movable cavity. Multiple through slots matching the insertion plates (24) are opened on the reset plate (25). A protrusion is fixed at one end of the multiple insertion plates (24) away from the insertion holes (23). The reset plate (25) is connected to the movable cavity through an elastic element. A connecting ring (26) is fixedly connected to one side of the housing (20).

3. The blower-heated electric constant temperature drying oven according to claim 2, characterized in that, It also includes a blower, which is located inside the equipment section (4) and is used to provide power for air circulation inside the box; A heating device is provided on one side of the blower unit and close to the air supply section (5) for heating the gas; Bottom air supply device, the bottom air supply device is set at the bottom of the air supply section (5), the bottom air supply device and two adjustment units divide the air supply section (5) into an upper layer, a middle layer and a lower layer, the two adjustment units are respectively located in the upper layer and the middle layer, and a partition is provided between the upper layer and the middle layer, the height of the partition is at least the sum of the diameters of the two side air holes.

4. The blower-heated electric constant temperature drying oven according to claim 1, characterized in that, Three temperature sensors (8), (9) and (10) are fixed on the inner wall of the inner liner (3) near the return air section (6). The first temperature sensor (8), the second temperature sensor (9) and the third temperature sensor (10) are evenly distributed vertically. The first temperature sensor (8), the second temperature sensor (9) and the third temperature sensor (10) correspond to the upper layer, the middle layer and the lower layer, respectively.

5. A blower-driven, electrically heated, constant-temperature drying oven according to claim 2, characterized in that, The two connecting rings (26) are coaxially fixed with the same moving rod (27). The top of the outer shell (2) is fixed with a first oil cylinder (28). The end of the moving rod (27) that passes through the inside of the first oil cylinder (28) is coaxially fixed with a piston plate. The piston plate slides up and down in the first oil cylinder (28). The top of the outer shell (2) is provided with an oil storage cylinder (29) and a servo motor (30). The oil outlet end of the oil storage cylinder (29) is provided with an electromagnetic three-way valve (31). The oil inlet end of the first oil cylinder (28) is connected to the electromagnetic three-way valve (31) through a hose.

6. A blower-driven, electrically heated, constant-temperature drying oven according to claim 5, characterized in that, The oil reservoir (29) is provided with a first piston rod (32), which is threaded and threaded to the oil reservoir (29). The first piston rod (32) is provided with a polygonal connecting hole, and a polygonal connecting rod (33) is slidably connected in the polygonal connecting hole. A connecting shaft is coaxially fixed at the end of the polygonal connecting rod (33) away from the first piston rod (32), and the connecting shaft is coaxially fixed to the input end of the servo motor (30).

7. A blower-driven, electrically heated, constant-temperature drying oven according to claim 3, characterized in that, The bottom of the inner liner (3) is provided with a plurality of air grooves (34) evenly distributed front and back, and the bottom of the inner liner (3) is provided with a plurality of air outlets (35) communicating with the air grooves (34). The bottom air supply device includes an air guide plate (36) fixed to the bottom of the air supply part (5), and the air guide plate (36) is provided with a flow channel (37) matching the air grooves (34).

8. A blower-driven, electrically heated, constant-temperature drying oven according to claim 7, characterized in that, The bottom of the inner liner (3) is divided into a sparse area on the left and a dense area on the right. The distribution density of the air outlets in the sparse area is less than that in the dense area.

9. A blower-driven, electrically heated, constant-temperature drying oven according to claim 8, characterized in that, It also includes a bottom adjustment device, which includes multiple sliding plates (38) located inside the air groove (34). A fourth temperature sensor (39) and a fifth temperature sensor (40) are respectively provided on the left and right sides of the bottom of the inner liner (3). Multiple secondary holes (41) matching the air outlet are opened on the left half of the sliding plate (38). A connecting groove (42) is opened on the right half of the sliding plate (38). A positioning rod is fixedly connected to the right side of the sliding plate (38). The same mounting plate (43) is fixed to one end of the multiple positioning rods that pass through the return air section (6). A second oil cylinder (44) is provided in the return air section (6). A second piston rod that slides left and right is provided in the second oil cylinder (44). A positioning plate (45) is fixed to one end of the second piston rod that passes through the second oil cylinder (44). The positioning plate (45) is fixedly connected to the mounting plate (43). The oil inlet end of the second oil cylinder (44) is connected to the electromagnetic three-way valve (31) through a hose.

10. A blower-driven, electrically heated, constant-temperature drying oven according to claim 7, characterized in that, The bottom of the air trough (34) is fixedly connected to an inclined plate (46), and the cross-sectional height of the inclined plate (46) increases from left to right.

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