Air blowing electric heating constant-temperature drying box

Abstract

The invention provides an air blowing electric heating constant-temperature drying box, and relates to the technical field of drying boxes, the air blowing electric heating constant-temperature drying box comprises a drying box main body, the drying box main body comprises a shell and an inner container, the shell and the inner container form a cavity, and an equipment part located at the top, an air supply part on the left side and an air return part on the right side are arranged in the cavity; a plurality of side air holes communicating with the air supply part and the air return part are formed in the left side and the right side of the inner container in a penetrating mode correspondingly, and the drying box further comprises an air blowing device, a heating device, an adjusting assembly, an electromagnetic control device and a bottom air supply device. And the problems that the temperature in the drying box is unbalanced are solved, and the requirement for large-scale industrial drying can be met.

Description

Technical Field

[0001] The invention relates to the technical field of drying ovens, in particular to an air-blast electric heating constant-temperature drying oven. Background Art

[0002] The blast electric constant temperature drying oven, usually referred to as a blast drying oven or oven, is a commonly used equipment in laboratories and industries. It is mainly used to dry samples, heat treatment materials and conduct some experiments that require constant temperature conditions.

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

[0004] A Chinese patent with application number 202111547911.2 discloses an electric constant temperature blast drying oven, comprising a drying oven body, a first rotating assembly and a plurality of trays, the first rotating assembly being installed in the drying oven body and close to the middle of the drying oven body, the plurality of trays being connected to the first rotating assembly for driving the trays to rotate, and the plurality of trays for placing the products to be dried being arranged in a row along the height direction of the drying oven body; a first blower is provided on the outer top surface and the outer bottom surface of the drying oven body, the air outlet of the first blower is connected to the top or the bottom of the drying oven body, two opposite inner side surfaces of the drying oven body are provided with electric heating plates, two opposite outer side surfaces of the drying oven body are provided with second blowers, the two electric heating plates are respectively close to two second blowers, the second blower is close to the electric heating plates on the same side, and the air outlet of the second blower is connected to the side of the drying oven body; a constant pressure valve is provided on the top of the drying oven body, which has the effect of improving the uniformity of heating and drying.

[0005] A Chinese patent with application number 202020440279.6 discloses an electric oven, comprising a box body, a heater being provided at the rear end of the box body, a door body being provided at the front end of the box body, the door body being hinged to the box body, a heating plate being provided at the bottom end of the inside of the box body, and evenly distributed heat dissipation holes being provided on the heating plate. A sliding bracket is also provided inside the box body, a fixed net and a first roller are provided on the sliding bracket, slide rails are provided between the left and right sides of the heating plate and the side walls of the box body, the first roller and the slide rail are rollingly connected to the electric oven, a sliding bracket is provided inside the electric oven, and after the items are dried, the sliding bracket is pulled out of the oven, which not only facilitates the removal of the items, but also reduces the probability of burns to the staff.

[0006] Large industrial blast ovens similar to the above technology also have the following problems: 1. Due to the structural limitations of conventional industrial blast drying ovens, large drying ovens basically use one side for air outlet and one side for air return, and finally form a gas circulation through the top of the box, which will cause uneven heating of the material. The existing blast drying ovens also have structural optimizations for this problem, but they are basically small drying ovens. Due to the volume of industrial drying ovens, the structural optimization of small drying ovens for single-side wind is not suitable for large equipment.

[0007] 2. In the drying of fire-fighting powder, it is sometimes necessary to put the materials on multi-layer shelves, and then push the shelves into the drying box for drying. When the materials on the shelves are dried in the form of side air outlet, the effect is not optimal, and there are drying dead corners, especially at the bottom and leeward side of the materials. Summary of the invention

[0008] In view of the above problems, the present invention provides a blast electric heating constant temperature drying box, which has the advantages of more uniform temperature in the drying box and better air outlet effect on both sides of the bottom of the box.

[0009] The technical solution is a blast electric heating constant temperature drying oven, comprising a drying oven body, an outer shell and an inner tank, and also comprising an equipment part, an air supply part and an air return part, wherein the left and right sides of the inner tank are respectively penetrated with a plurality of side air holes connected with the air supply part and the air return part; further comprising an adjustment component, wherein the adjustment component is arranged in the air supply part, wherein the adjustment component comprises two adjustment units distributed up and down, wherein the adjustment unit comprises a baffle plate connected to the inner tank for sliding up and down, wherein the baffle plate is provided with a plurality of through holes matching the side air holes; the adjustment unit further comprises a plurality of air guide strips evenly distributed up and down, wherein the air guide strips comprise a rotating shaft and an air guide plate, wherein the rotating shaft rotates with the outer shell The wind guide plate is provided with a plurality of equidistantly arranged wind guide ports, and the lengths of the wind guide ports on the plurality of wind guide plates increase gradually from top to bottom. A curved rod is provided between the baffle plate and the wind guide strip, one end of the curved rod is fixedly connected to the rotating shaft, and the other end of the curved rod passes through a waist-shaped sliding hole. A connecting rod is fixed to one end of the baffle plate close to the curved rod, and the connecting rod is slidably connected to the waist-shaped sliding hole. A synchronizer is provided between the wind guide plates in the same adjusting unit, and the synchronizer includes a synchronization rod and connecting blocks at both ends of the synchronization rod, and the two connecting blocks are respectively fixedly connected to the upper and lower adjacent wind guide plates, and the synchronization rod is rotatably connected to the two connecting blocks.

[0010] Preferably, it also includes an electromagnetic control device, which is arranged in the air supply part and located on one side of the baffle, and the electromagnetic control device includes two electromagnetic control units distributed up and down, which are used to control the up and down movement of the baffle; the electromagnetic control unit includes a shell, and a waist-shaped hole matching the connecting rod is opened through the shell, and the connecting rod is located in the waist-shaped hole, and an active cavity located on one side of the waist-shaped hole is arranged in the shell, and an electromagnetic part is fixed in the active cavity, and a plurality of jacks evenly distributed up and down are opened through the side of the waist-shaped hole close to the active cavity, and a plug plate is slidably connected in the plug hole, and a reset plate sliding left and right is arranged in the active cavity, and a plurality of through grooves matching the plug plate are opened on the reset plate, and a convex plate is fixed on the end of the plurality of plug plates away from the jack, and the reset plate is connected to the active cavity through an elastic member, and a connecting ring is fixedly connected to one side of the shell.

[0011] Preferably, it also includes an air blowing device, which is arranged in the equipment part and is used to provide power for air circulation in the box; a heating device, which is arranged on one side of the air blowing unit and close to the air supply part, and is used to heat the gas; a bottom air supply device, which is arranged at the bottom of the air supply part, and the bottom air supply device and two adjustment units divide the air supply part into an upper layer area, a middle layer area and a lower layer area, and the two adjustment units are respectively located in the upper layer area and the middle layer area, and a spacing belt is arranged between the upper layer area and the middle layer area, and the height of the spacing belt is at least the sum of the diameters of the two side air holes.

[0012] Preferably, three first temperature sensors, a second temperature sensor and a third temperature sensor evenly distributed up and down are fixed on the inner wall of the inner tank close to the return air part, and the first temperature sensor, the second temperature sensor and the third temperature sensor correspond to the upper area, the middle area and the lower area respectively.

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

[0014] Preferably, a first piston rod is provided inside the oil storage cylinder, a thread is provided on the first piston rod, the first piston rod is threadedly connected to the oil storage cylinder, a polygonal connecting hole is provided on the first piston rod, a polygonal connecting rod is slidably connected in the polygonal connecting hole, a connecting shaft is coaxially fixed to the end of the polygonal connecting rod away from the first piston rod, and 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 equidistantly distributed front to back, the bottom of the inner liner is provided with a plurality of air outlet holes connected with the air grooves, the bottom air supply device includes an air induction plate fixed at the bottom of the air supply part, and the air induction plate is provided with flow channels matching the air grooves.

[0016] Preferably, the bottom of the inner tank is divided into a sparse area on the left and a dense area on the right, and the air outlet hole distribution density in the sparse area is smaller than the air outlet hole distribution density in the dense area.

[0017] Preferably, it also includes a bottom adjustment device, which includes a plurality of slides located inside the air groove, a fourth temperature sensor and a fifth temperature sensor are respectively arranged on the left and right sides of the bottom of the inner tank, a plurality of auxiliary holes matching the air outlet holes are opened on the left half of the slide, a connecting groove is opened on the right half of the slide, a positioning rod is fixedly connected to the right side of the slide, a plurality of the positioning rods pass through one end of the return air part and are fixed with the same mounting plate, a second oil cylinder is arranged in the return air part, a second piston rod sliding left and right is arranged in the second oil cylinder, a positioning plate is fixed on one end of the second piston rod passing through the second oil cylinder, the positioning plate is fixedly connected to the mounting plate, and the oil inlet end of the second oil cylinder is connected to the electromagnetic three-way valve through a hose.

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

[0019] Compared with the existing known technologies, the technical solution provided by the present invention has the following significant effects: 1. Through the setting of the upper zone, the middle zone and the lower zone, during the drying process of the material, the three temperature sensors can respectively monitor the return air temperature of the three zones in real time. 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, and the electromagnetic control component will drive the baffle of the corresponding zone to move, so as to balance the temperature inside the drying box and prevent problems such as uneven temperature between the upper and lower zones inside the drying box. It can be applied to large industrial drying boxes.

[0020] 2. Through the settings of the waist-shaped hole, the electromagnetic part, the jack, the plug plate and the reset plate, the plug plate can limit the connecting rod according to the different heights of the connecting rod in the waist-shaped hole, so as to realize the staggered movement of the baffles in the upper and middle areas, so that the side air volume of the upper and middle areas has higher adjustability.

[0021] 3. Through the settings of air grooves, air outlets, induced draft plates and flow channels, when the third temperature sensor detects that the return air temperature of the lower layer is lower than the temperature average of the other two layers, the control box sends an electrical signal to the electromagnetic control component and other related equipment. At this time, the side air volume of the upper and middle layers is reduced, and a large amount of hot gas is guided by the induced draft plates and enters multiple air grooves through the flow channels, and is finally ejected from the air outlet, which greatly reduces the drying dead corners of the materials, especially for the materials placed on the shelves.

[0022] 4. Through the settings of sparse areas and dense areas, when the hot air passes through the sparse area on the left, the wind attenuation on the right is significantly improved due to the smaller number of air outlets, which improves the air outlet effect at the bottom of the drying box to a certain extent.

[0023] 5. Through the settings of the slide plate, the fourth temperature sensor, the fifth temperature sensor, the second oil cylinder and the positioning plate, when the fifth temperature sensor detects that the air outlet temperature on the right is significantly lower than the air outlet temperature on the left, the control box controls the circuit connection between the electromagnetic three-way valve and the second oil cylinder, the oil circuit between the first oil cylinder and the oil storage cylinder is closed, the servo motor is started, the hydraulic oil in the oil storage cylinder will enter the second oil cylinder, and the second piston rod will drive the mounting plate to move. At this time, the air outlet on the left will be gradually blocked, so as to realize the adjustment of the air outlet volume at the bottom of the drying box, which greatly improves the temperature uniformity on the left and right sides of the box. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0026] Figure 3 It is a three-dimensional schematic diagram of the first temperature sensor and its connecting member in the present invention.

[0027] Figure 4 It is a three-dimensional schematic diagram of the air induced plate and its connecting parts in the present invention.

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

[0029] Figure 6 The present invention Figure 5 Enlarged schematic diagram of the structure at C in the middle.

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

[0031] Figure 8 It is a three-dimensional schematic diagram of the electromagnetic part and its connecting parts in the present invention.

[0032] Fig. 9It is a schematic diagram of the coordination of the reset plate and the plug plate in the present invention.

[0033] Fig.10 The present invention Figure 1 A schematic diagram of the enlarged structure at point A in the middle.

[0034] Fig.11 It is a schematic diagram of the air groove and the air outlet in the present invention.

[0035] Fig.12 It is a three-dimensional schematic diagram of the slide plate and its connecting parts in the present invention.

[0036] Fig.13 The present invention Figure 2 A magnified schematic diagram of the structure at point B in the middle.

[0037] Explanation of the symbols in the schematic diagram: 1. Drying box body; 2. Shell; 3. Inner liner; 4. Equipment part; 5. Air supply part; 6. Air return part; 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. Bending rod; 15. Waist-shaped sliding hole; 16. Connecting rod; 17. Synchronizer; 18. Synchronizing rod; 19. Connecting block; 20. Shell; 21. Waist-shaped hole; 22. Electromagnetic part; 23. Plug-in; 24. Plug-in board; 25. Reset plate; 26. Connecting ring; 27. Moving rod; 28. First oil cylinder; 29. ​​Oil storage cylinder; 30. Servo motor; 31. Solenoid three-way valve; 32. First piston rod; 33. Polygonal connecting rod; 34. Air groove; 35. Air outlet; 36. Air induction 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 DESCRIPTION

[0038] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0039] Depend on Figure 1 to Figure 2 The present invention provides a drying box body 1, which includes a shell 2 and an inner tank 3. The shell 2 and the inner tank 3 form a cavity. The cavity is provided with an equipment part 4 located at the top, an air supply part 5 on the left and a return air part 6 on the right. The left and right sides of the inner tank 3 are respectively penetrated with a plurality of side air holes connected with the air supply part 5 and the return air part 6, thereby forming a reciprocating circulation channel inside the box body and the cavity. The above are all existing structures of existing drying boxes and will not be repeated here. The drying box body 1 includes a blast device, a heating device, an adjustment component, an electromagnetic control device and a bottom air supply device.

[0040] The blowing device is arranged in the equipment part 4 to provide power for air circulation in the box. The blowing device adopts a blower to promote the air flow in the box to form convection.

[0041] The heating device is arranged on one side of the blower unit and close to the air supply part 5. The heating device adopts an electric heating tube. A heating wire is arranged inside the electric heating tube. When the air passes through the electric heating tube, the temperature of the gas increases, thereby heating the gas through multiple cycles.

[0042] The adjustment component is arranged in the air supply part 5, and the adjustment component includes two adjustment units distributed up and down, and the adjustment unit includes a baffle 7 which is slidably connected to the inner liner 3 up and down; in this embodiment, a vertical slide groove is opened on the side wall of the inner liner 3, and a slider matching the slide groove is fixed on the baffle 7, and a plurality of through holes matching the side air holes are opened on the baffle 7.

[0043] The electromagnetic control device is arranged in the air supply part 5 and is located on one side of the baffle 7. The electromagnetic control device includes two electromagnetic control units distributed up and down, which are used to control the up and down movement of the baffle 7. When the electromagnetic control device is used, the corresponding electromagnetic control units can be controlled separately to realize step-by-step adjustment.

[0044] The bottom air supply device is arranged at the bottom of the air supply part 5, and is used to guide the gas to flow out from the bottom of the box. The purpose of setting the bottom air supply device is to improve the drying effect of the material in the box, especially the material placed on the multi-layer shelf.

[0045] refer to Figure 2 and Figure 3 As shown, since large drying boxes basically use one side for air outlet and one side for air return, and finally form a gas circulation through the top of the box body, it will cause uneven heating of the material. The existing blast drying boxes also have structural optimization for this problem, but they are basically small drying boxes. Due to the volume of industrial drying boxes, the structural optimization of small drying boxes for single-side wind is not suitable for large equipment. In response to the above problem, the bottom air supply device and the two adjustment units divide the air supply part 5 into an upper area, a middle area and a lower area. The two adjustment units are respectively located in the upper area and the middle area, and a spacing belt is set between the upper area and the middle area; it should be noted that the spacing belt is a blank area to distinguish the upper area from the middle area. No side wind holes are opened on the spacing belt. The height of the spacing belt is at least the sum of the diameters of the two side wind holes, which can avoid collision between the two baffles 7 when moving up and down.

[0046] Three first temperature sensors 8, second temperature sensors 9 and third temperature sensors 10 evenly distributed up and down are fixed on the inner wall of the inner tank 3 near the return air part 6. The first temperature sensor 8, the second temperature sensor 9 and the third temperature sensor 10 correspond to the upper zone, the middle zone and the lower zone respectively. A control box is arranged on the side of the outer shell 2, and a control unit is arranged in the control box. The control box is connected with all power source electrical signals, and the three temperature sensors are connected with the control box electrical signals respectively. Through the arrangement of the upper zone, the middle zone and the lower zone, in the process of drying the material, the three temperature sensors can respectively monitor the return air temperature of the three zones in real time. When one of the temperature sensors detects that the return air temperature of the zone is lower than the temperature range of the other two zones, the temperature sensor can send a signal to the control box for subsequent operation.

[0047] refer to Figures 4 to 6 As shown, the regulating unit also includes a plurality of air guide strips 11 evenly distributed up and down, the air guide strips 11 include 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, the rotating shaft 12 is rotatably connected to the outer shell 2, and a plurality of equidistantly arranged air guide ports are provided on the air guide plate 13. The lengths of the air guide ports on the plurality of air guide plates 13 increase in a gradient from top to bottom. The purpose of limiting the length of the air guide ports is to ensure balanced air volume in the same layer area. When the gas passes through the equipment part 4 and enters the air supply part 5, each time it passes through a layer area, part of the gas will pass through the side wind holes under the guidance of the air guide plate 13 and enter the material drying area. In this embodiment, the initial inclination angle of the air guide plate 13 relative to the housing 2 is 40 degrees. As the baffle 7 descends, the inclination angle gradually decreases. A curved rod 14 is arranged 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 penetrated by a waist-shaped sliding hole 15. A connecting rod 16 is fixed to the end of the baffle 7 close to 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, and the inclination 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 arranged between the air guide plates 13 in the same adjustment unit. The synchronizer 17 includes a synchronization rod 18 and connecting blocks 19 at both ends of the synchronization rod 18. The connecting block 19 is provided with a card slot consistent with the thickness of the air guide plate 13. The two connecting blocks 19 are respectively connected to the upper and lower adjacent air guide plates 13. The synchronization rod 18 can also be rotatably connected to the two connecting blocks 19 by screw fixing.

[0049] In order to ensure that the side air volume of the middle layer area is substantially consistent with the air volume of the upper layer area, the length of the air guide plate 13 in the middle layer area is greater than that of the air guide plate 13 in the upper layer area.

[0050] refer to Figure 8 and Fig. 9 As shown, further supplementing the movement mode of the baffle 7 and the structure of the electromagnetic control unit is that the electromagnetic control unit includes a shell 20, and a waist-shaped hole 21 matching the connecting rod 16 is formed on the shell 20, and the height of the waist-shaped hole 21 is greater than the distance that the baffle 7 moves up and down, and the connecting rod 16 is located in the waist-shaped hole 21, and an active cavity located on one side of the waist-shaped hole 21 is provided in the shell 20, and an electromagnetic part 22 is fixed in the active cavity, and the electromagnetic part 22 is connected to the control box electrical signal, and a plurality of jacks 23 evenly distributed up and down are formed on the side of the waist-shaped hole 21 close to the active cavity, and a plug plate 24 is slidably connected in the plug plate 23, and the plug plate 24 is made of magnetic material, and a reset plate 25 that slides left and right is provided in the active cavity, and a plurality of through grooves matching the plug plate 24 are formed on the reset plate 25, and a convex plate is fixed on one end of the plurality of plug plates 24 away from the plug hole 23, and the reset plate 25 is connected to the active cavity through an elastic member, and the waist-shaped hole 21 and the electromagnetic The electromagnetic part 22, the plug hole 23, the plug plate 24 and the reset plate 25 are arranged. When the electromagnetic part 22 is energized, multiple plug plates 24 are simultaneously subjected to a strong repulsive force, and multiple plug plates 24 drive the reset plate 25 to overcome the elastic force of the elastic member and move toward the side of the waist-shaped hole 21, and the connecting rod 16 is limited in the waist-shaped hole 21. When the electromagnetic part 22 is powered off, the reset plate 25 drives multiple plug plates 24 to reset under the action of the elastic member. The advantage of such a setting is that the plug plate 24 can limit the connecting rod 16 according to the different heights of the connecting rod 16 in the waist-shaped hole 21. For example, in this embodiment, when the baffle plate 7 in the upper layer area moves down by half the diameter of the side air hole, the electromagnetic control unit below limits the connecting rod 16 again, and the baffle plate 7 in the middle layer area moves down by half the diameter of the side air hole again. The side air holes in the upper layer area are all blocked, and the middle layer area only retains half of the air outlet, and most of the gas will enter the lower layer area.

[0051] refer to Fig.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 shell 20, and 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 outer shell 2, and 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 in the first oil cylinder 28. An oil storage cylinder 29 and a servo motor 30 are arranged on the top of the outer shell 2, and an electromagnetic three-way valve 31 is arranged at the oil outlet end of the oil storage cylinder 29, and the oil inlet end of the first oil cylinder 28 is connected to the electromagnetic three-way valve 31 through a hose.

[0052] A first piston rod 32 is provided inside the oil storage cylinder 29. The first piston rod 32 is provided with a thread. The first piston rod 32 is threadedly connected to the oil storage cylinder 29. A polygonal connecting hole is provided on the first piston rod 32. A polygonal connecting rod 33 is slidably connected in the polygonal connecting hole. A connecting shaft is coaxially fixed to the end of the polygonal connecting rod 33 away from the first piston rod 32. The connecting shaft is coaxially fixed to the input end of the servo motor 30. Through 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 accuracy under the dual 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 Fig.11 As shown, further supplementing the matching structure of the bottom air supply device and the inner liner 3 is that a plurality of air grooves 34 are arranged at the bottom of the inner liner 3 and are equidistantly distributed in the front and rear directions. The reason for setting the air grooves 34 is mainly to consider that the bottom of the inner liner 3 needs to have a certain load-bearing capacity, so a large-scale hollow structure needs to be avoided below the inner liner 3. A plurality of air outlets 35 connected to the air grooves 34 are arranged at the bottom of the inner liner 3. The bottom air supply device includes an air induction plate 36 fixed to the bottom of the air supply portion 5, and a flow channel matching the air grooves 34 is arranged in the air induction plate 36. 37. Through the arrangement of the air grooves 34, the air outlet holes 35, the air induced draft plates 36 and the flow channels 37, when the third temperature sensor 10 detects that the return air temperature of the lower layer is lower than the temperature average of the other two layers, the control box will send an electrical signal to the electromagnetic control component and other related equipment. At this time, the side air volume of the upper layer and the middle layer is reduced, and a large amount of hot gas is guided by the air induced draft plates 36 and enters the multiple air grooves 34 through the flow channels 37, and is finally ejected from the air outlet holes 35, which greatly reduces the drying dead corners of the materials, especially for the materials placed on the shelves.

[0054] refer to Figure 3 and Fig.11 As shown, considering the problem of wind attenuation when the gas passes through the air slot 34, the air volume at the bottom right is significantly smaller than that at the left, so that the bottom air outlet effect is not optimal, the bottom of the inner tank 3 is divided into a sparse area on the left and a dense area on the right, and the air outlet hole distribution density in the sparse area is smaller than that in the dense area. Through the settings of the sparse area and the dense area, when the hot air passes through the sparse area on the left, due to the small number of air outlet holes, the wind attenuation on the right is significantly improved, thereby improving the air outlet effect at the bottom of the drying box to a certain extent.

[0055] refer to Figure 2 , Fig.12 and Fig.13As shown, the air outlet effect at the bottom of the drying box is further optimized by further including a bottom adjustment device, which includes a plurality of slide plates 38 located inside the air groove 34, and a fourth temperature sensor 39 and a fifth temperature sensor 40 are respectively arranged on the left and right sides of the bottom of the inner tank 3, which are used to monitor the temperature changes on the left and right sides of the bottom of the box in real time when the air is discharged, and the fourth temperature sensor 39 and the fifth temperature sensor 40 are respectively connected to the control box electrical signal, and a plurality of auxiliary holes 41 matching the air outlet holes are provided on the left half of the slide plate 38, and a connecting groove 42 is provided on the right half of the slide plate 38, and a positioning rod is fixedly connected to the right side of the slide plate 38, and a plurality of positioning rods are penetrated to one end of the return air part 6 and fixed with the same mounting plate 43, and a second oil cylinder 44 is arranged in the return air part 6, and a second movable The plug rod, the second piston rod passes through the second oil cylinder 44 and is fixed with a positioning plate 45 at one end, 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, and is arranged through the slide plate 38, the fourth temperature sensor 39, the fifth temperature sensor 40, the second oil 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 the air outlet temperature on the left side, the control box controls the circuit conduction of the electromagnetic three-way valve 31 and the second oil cylinder 44, 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 this time, the air outlet on the left side will be gradually blocked, so as to realize the adjustment of the air outlet volume at the bottom of the drying box.

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

[0057] When the present invention is in use: first, start the blast device and the heating device to preheat the inside of the equipment, and then push the material into the drying box body 1; then, the first temperature sensor 8 to the third temperature sensor 10 monitor the upper layer, the middle layer and the lower layer respectively. When the third temperature sensor 10 detects that the return air temperature of the lower layer is lower than the temperature average of the other two layers, the control box sends an electrical signal to the electromagnetic control component of the upper layer or the upper and middle layers. When the electromagnetic part 22 is energized, multiple plug-ins 24 are simultaneously subjected to a strong repulsive force. Multiple plug-ins 24 drive the reset plate 25 to overcome the elastic force of the elastic member and move to one 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 powered off, the reset plate 25 drives the multiple plug-ins 24 to reset under the action of the elastic member. The plug-ins 24 can limit the connecting rod 16 according to the different heights of the connecting rod 16 in the waist-shaped hole 21.

[0058] At the same time, the servo motor 30 is started, 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 area will change.

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

[0060] Finally, for the adjustment of the air outlet on both sides of the bottom, when the fifth temperature sensor 40 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 circuit connection of the electromagnetic three-way valve 31 and the second oil cylinder 44, and 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 this time, the air outlet on the left side will be gradually blocked, thereby realizing the adjustment of the air outlet at the bottom of the drying box.

[0061] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A blast electric heating constant temperature drying oven, comprising a drying oven body (1), an outer shell (2) and an inner liner (3), characterized in that: It also comprises an equipment part (4), an air supply part (5) and an air return part (6), and a plurality of side air holes communicating with the air supply part (5) and the air return part (6) are respectively provided on the left and right sides of the inner tank (3); It also includes an adjustment component, the adjustment component is arranged in the air supply part (5), the adjustment component includes two adjustment units distributed up and down, the adjustment unit includes a baffle (7) connected to the inner liner (3) in an up and down sliding manner, and the baffle (7) is provided with a plurality of through holes matching the side air holes; The regulating unit further comprises a plurality of wind guide strips (11) evenly distributed up and down, the wind guide strips (11) comprising a rotating shaft (12) and a wind guide plate (13), the rotating shaft (12) being rotatably connected to the housing (2), the wind guide plate (13) being provided with a plurality of wind guide ports arranged at equal intervals, the lengths of the wind guide ports on the plurality of wind guide plates (13) increasing in a gradient manner from top to bottom, a curved rod (14) being provided between the baffle plate (7) and the wind guide strip (11), one end of the curved rod (14) being fixedly connected to the rotating shaft (12), the other end of the curved rod (14) being penetrated by a waist-shaped sliding hole (15), a connecting rod (16) being fixed to one end of the baffle plate (7) close to the curved rod (14), the connecting rod (16) being slidably connected to the waist-shaped sliding hole (15); A synchronizer (17) is provided between the air guide plates (13) in the same regulating unit. The synchronizer (17) comprises a synchronization rod (18) and connection blocks (19) at both ends of the synchronization rod (18). The two connection blocks (19) are respectively fixedly connected to the upper and lower adjacent air guide plates (13). The synchronization rod (18) is rotationally connected to the two connection blocks (19).

2. The blast electric heating constant temperature drying oven according to claim 1, characterized in that: It also includes an electromagnetic control device, which is arranged in the air supply portion (5) and located on one side of the baffle (7), and the electromagnetic control device includes two electromagnetic control units distributed up and down, and is used to control the up and down movement of the baffle (7); The electromagnetic control unit comprises a housing (20), the housing (20) being provided with a waist-shaped hole (21) matching with a connecting rod (16), the connecting rod (16) being located in the waist-shaped hole (21), the housing (20) being provided with an active cavity located on one side of the waist-shaped hole (21), the active cavity being provided with an electromagnetic part (22), the waist-shaped hole (21) being provided with a side close to the active cavity being provided with a plurality of jacks (23) evenly distributed up and down, the jacks (23) being slidably connected with plug plates (24), the active cavity being provided with a reset plate (25) sliding left and right, the reset plate (25) being provided with a plurality of through slots matching with the plug plates (24), the ends of the plurality of plug plates (24) being away from the plug holes (23) being fixed with convex plates, the reset plate (25) being connected to the active cavity via an elastic member, and a connecting ring (26) being fixedly connected to one side of the housing (20).

3. The blast electric heating constant temperature drying oven according to claim 2, characterized in that: It also includes a blowing device, which is arranged in the equipment part (4) and is used to provide power for air circulation in the box; A heating device, the heating device being arranged on one side of the air blowing unit and close to the air supply portion (5), and being used for heating the gas; A bottom air supply device, the bottom air supply device is arranged 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 area, a middle layer area and a lower layer area, the two adjustment units are respectively located in the upper layer area and the middle layer area, a spacing belt is arranged between the upper layer area and the middle layer area, and the height of the spacing belt is at least the sum of the diameters of the two side air holes.

4. The blast electric heating constant temperature drying oven according to claim 1, characterized in that: Three first temperature sensors (8), a second temperature sensor (9) and a third temperature sensor (10) are fixed on the inner wall of the inner tank (3) close to the return air portion (6), and are evenly distributed up and down. The first temperature sensor (8), the second temperature sensor (9) and the third temperature sensor (10) correspond to the upper layer area, the middle layer area and the lower layer area, respectively.

5. The blast electric heating constant temperature drying oven according to claim 2, characterized in that: The two connecting rings (26) are coaxially fixed with a same moving rod (27), the top of the housing (2) is fixed with a first oil cylinder (28), one end of the moving rod (27) extending through 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 housing (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), and the oil inlet end of the first oil cylinder (28) is connected to the electromagnetic three-way valve (31) through a hose.

6. The blast electric heating constant temperature drying oven according to claim 5, characterized in that: A first piston rod (32) is arranged inside the oil storage cylinder (29). The first piston rod (32) is provided with a thread. The first piston rod (32) is threadedly connected to the oil storage cylinder (29). The first piston rod (32) is provided with a polygonal connecting hole. A polygonal connecting rod (33) is slidably connected in the polygonal connecting hole. A connecting shaft is coaxially fixed to one end of the polygonal connecting rod (33) away from the first piston rod (32). The connecting shaft is coaxially fixed to the input end of the servo motor (30).

7. The blast electric heating 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) equidistantly distributed in the front and rear directions, the bottom of the inner liner (3) is provided with a plurality of air outlet holes (35) in communication with the air grooves (34), and the bottom air supply device comprises an air induction plate (36) fixed to the bottom of the air supply portion (5), and a flow channel (37) matching the air grooves (34) is provided in the air induction plate (36).

8. The blast electric heating 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, and the air outlet hole distribution density in the sparse area is smaller than the air outlet hole distribution density in the dense area.

9. The blast electric heating constant temperature drying oven according to claim 8, characterized in that: The bottom regulating device also comprises a bottom regulating device, the bottom regulating device comprising a plurality of slide plates (38) located inside the air groove (34), a fourth temperature sensor (39) and a fifth temperature sensor (40) being respectively arranged on the left and right sides of the bottom of the inner tank (3), a plurality of auxiliary holes (41) matching the air outlet holes being opened on the left half side of the slide plate (38), a connecting groove (42) being opened on the right half side of the slide plate (38), a positioning rod being fixedly connected to the right side of the slide plate (38), a plurality of the positioning rods being passed through the return air portion (6) and having one end fixed thereto and having the same mounting plate (43), a second oil cylinder (44) being arranged inside the return air portion (6), a second piston rod being arranged inside the second oil cylinder (44) and being slidable left and right, a positioning plate (45) being fixedly connected to one end of the second piston rod passing through the second oil cylinder (44), the positioning plate (45) being fixedly connected to the mounting plate (43), and an oil inlet end of the second oil cylinder (44) being connected to the electromagnetic three-way valve (31) through a hose.

10. The blast electric heating constant temperature drying oven according to claim 7, characterized in that: The bottom of the air groove (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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