A baking oven

Abstract

The present invention relates to the technical field of baking equipment, and specifically discloses a baking oven, comprising: a furnace body and a bracket, wherein multiple layers of trays are arranged in the bracket, an upper air cavity is opened in the top wall of the furnace body for forming hot air, side air cavities connected with the upper air cavity are opened in the left and right opposite side walls of the furnace body, an air outlet assembly is arranged on the side of each layer of trays, which is used to allow the hot air in the side air cavity to enter the furnace cavity of the furnace body, and an air guide assembly is arranged on the air outlet assembly, which is used to guide the blowing direction of the hot air; the baking oven of the present invention is convenient for regulating the ventilation volume on each layer of the supporting platform by adjusting the connecting area of ​​the fixed air holes and the movable air holes on the side of the supporting platform, so that the temperature on each layer of the supporting platform is close to the same, the temperature difference between the layers of the supporting platforms is reduced, and the swing of the air guide plate guides the direction of the hot air, evenly distributes the air on the supporting platform, so that the temperature of each area on the supporting platform is close to the same, so that the baking time of each layer of materials is close to the same.

Description

Technical Field

[0001] The invention relates to the technical field of baking equipment, and in particular to a baking oven. Background Art

[0002] A baking oven is a device that processes materials by forming hot air, and is generally a closed or semi-closed structure. A baking oven is also called an oven, a baking oven, or a baking furnace. It can also be used to refer to a device that uses hot gas for high-temperature treatment. Baking ovens are divided into single-layer, double-layer, and three-layer types. Each layer is independently controlled and can be used at the same time or in a single layer. Generally, they have an automatic constant temperature system and are widely used in various occasions such as homes, restaurants, and industrial production. In industrial production, when processing catalysts, a baking oven is needed to bake the catalysts to remove water and volatile substances in the catalysts, optimize their crystal form, pore size, and specific surface area, and improve their mechanical strength.

[0003] A high-temperature baking oven is disclosed in the patent document with the authorization announcement number CN210374606U, including a baking oven main body, a moving assembly is provided at the bottom of the baking oven main body, a plurality of longitudinally installed electric heating tubes are provided in the front-to-back direction at a position near the right side inside the baking oven main body, a fan is provided on the right end face of the baking oven main body, a circulating air duct connected to the air inlet end of the fan is provided on the left end face of the baking oven main body, a base is provided at the bottom of the inner cavity of the baking oven main body, a baking rack is connected to the base by mounting bolts, a plurality of fixing racks are provided on the inner side face of the baking rack in the up-down direction, and the upper end face of the fixing rack A plurality of through slots are provided along the front and rear directions, and a supporting wheel is installed in each of the through slots, and a placing tray is placed on the supporting wheel. A control panel is provided at a position near the right side of the front end face of the baking oven main body, and a box door is hinged at a position near the left side of the front end face of the baking oven main body, and a temperature gauge with a measuring end extending into the inner side thereof is provided on the outer side face of the box door. The control panel is electrically connected to the electric heating tube and the fan, which is convenient for taking and placing the placing tray, and for separating a plurality of placing trays, thereby improving the baking efficiency, promoting the circulation of hot air, and evenly blowing the hot air to each placing tray, thereby improving the baking effect, being convenient for movement, and being convenient to use.

[0004] However, the following problems still exist in this solution: it is inconvenient to adjust the hot air flow rate of the ventilation holes on the air dispersion plate, the area of ​​the air dispersion plate is large, and the dispersion area of ​​the hot air will also increase accordingly. This results in a fast hot air flow rate in the ventilation holes on the air dispersion plate close to the fan position, and a high temperature on the corresponding layer of the placement tray, while a slow hot air flow rate in the ventilation holes far away from the fan position, and a correspondingly low temperature on the placement tray. Ultimately, a large temperature difference is caused on different placement trays, affecting the overall baking effect of the material, and it is very easy to over-bake or under-bake. In addition, the hot air flows out naturally from the ventilation holes, and it is impossible to ensure that the hot air is evenly distributed in various areas on the placement tray, resulting in a decrease in baking efficiency. Summary of the invention

[0005] The present invention provides a baking oven, aiming to solve the problem in the related art that it is inconvenient to adjust the hot air flow rate of the ventilation holes on the air dispersion plate, resulting in a large temperature difference on different placement trays, and the hot air naturally flows out from the ventilation holes, and it is impossible to ensure that the hot air is evenly distributed in various parts of the placement tray.

[0006] The baking oven of the present invention comprises a furnace body and a support, wherein a plurality of trays are arranged in the support, an upper air cavity is provided in the top wall of the furnace body for forming hot air, and side air cavities connected to the upper air cavity are provided in the left and right opposite side walls of the furnace body, and an air outlet assembly is provided on the side of each layer of the tray for allowing the hot air in the side air cavity to enter the furnace cavity of the furnace body, and an air guide assembly is provided on the air outlet assembly for guiding the blowing direction of the hot air;

[0007] The air outlet assembly includes a fixed plate and a movable plate. The fixed plate is fixedly mounted on the inner wall of the furnace body. A fixed air hole is provided inside the fixed plate to connect the side air cavity with the furnace cavity. The movable plate is slidably mounted inside the side air cavity and is located on one side of the fixed plate. A movable air hole matching the fixed air hole is provided on the movable plate.

[0008] The air guide assembly includes an air guide plate and a push rod. The air guide plate is rotatably connected to the fixed plate. The push rod is arranged in the furnace cavity of the furnace body, and the push rod can slide back and forth relative to the furnace body, thereby pushing the air guide plate to rotate on the fixed plate.

[0009] After the hot air is formed in the upper air cavity, it enters the furnace cavity of the furnace body through the fixed air holes and the movable air holes to bake the materials in the tray. By adjusting the connection area of ​​the fixed air holes and the movable air holes, it is convenient to control the ventilation volume on each layer of the tray, so that the temperature on each layer of the tray is close to the same, reducing the temperature difference between the layers of trays, and the rotation and swing of the air guide plate on the fixed plate guides the direction of the hot air and evenly distributes the air on the tray, so that the temperature of each area on the tray is close to the same, so that the baking time of each layer of materials is close to the same, reducing the occurrence of over-baking or under-baking.

[0010] Preferably, an air inlet pipe and an air outlet pipe are respectively connected to the top of the furnace body, and the bottom end of the air inlet pipe is connected to the upper air cavity, and the bottom end of the air outlet pipe is connected to the furnace cavity of the furnace body. A fan and a combustion unit are arranged inside the upper air cavity. The air entering the upper air cavity through the air inlet pipe is heated by the combustion unit and then blown by the fan into the side air cavity and the furnace cavity of the furnace body to bake the material. After the baking of the material is completed, the air is discharged from the air outlet pipe.

[0011] Preferably, a furnace door is hingedly connected to the furnace body, and a mounting groove is provided on a side wall of the furnace body opposite to the furnace door.

[0012] Preferably, the bracket is composed of a support frame and a support platform. The support platform has multiple layers and is fixed on the support frame equidistantly up and down. The tray is set on the support platform. A vertical plate is fixedly installed on each support platform, and a thermometer is provided on the vertical plate. The thermometer is used to monitor the temperature on each support platform, so as to better regulate the temperature on each layer of the pallet and reduce the temperature difference between each layer of the support platform.

[0013] Preferably, a support fixed inside the side air cavity is provided below the movable plate, a slide groove is provided at the bottom of the movable plate along its length direction, and the top of the support is slidably connected inside the slide groove, and an adjustment mechanism is provided on one side of the movable plate for pushing the movable plate to slide on the support, and the connecting area between the fixed air hole and the movable air hole can be changed by the sliding of the movable plate on the support, thereby adjusting the ventilation volume.

[0014] Preferably, the adjustment mechanism includes a screw and a threaded barrel. The screw is rotatably assembled inside the side air chamber, the threaded barrel is threadedly connected to the outside of the screw, and the end of the threaded barrel away from the screw is fixedly connected to the movable plate. A second motor installed on the furnace body is provided at the end of the screw. The screw is driven to rotate by the second motor, so that the threaded barrel moves outside the screw, thereby driving the movable plate to slide on the support.

[0015] Preferably, the push rod is fixedly connected to a side rod, a transverse groove is provided on the top of the air guide plate along its length direction, and one end of the side rod away from the push rod is slidably connected to the inside of the transverse groove. A pushing mechanism is provided on one side of the push rod, which is used to drive the push rod to reciprocate in the furnace body towards or away from the furnace door. The push rod drives the side rod to move, causing the side rod to slide in the transverse groove, and then pushes the air guide plate to rotate and swing on the fixed plate to guide the direction of the hot air.

[0016] Preferably, the pushing mechanism includes a reciprocating screw, a mounting plate, a slider and a first motor. The reciprocating screw is rotatably mounted on the side wall of the furnace body, the mounting plate is slidably connected in the mounting groove, the end of the push rod is fixedly mounted on the mounting plate, the slider is fixedly mounted in the middle of the mounting plate, and the slider is arranged outside the reciprocating screw. It can move back and forth along the threaded groove on the reciprocating screw as the reciprocating screw rotates. The first motor is fixedly mounted on the furnace body, and the output end of the first motor is coaxially fixed with the reciprocating screw. The reciprocating screw is driven by the first motor to rotate, pushing the slider to move, so that the slider drives the mounting plate to move, and then the push rod can push the air guide plate to swing.

[0017] Preferably, a horizontal installation frame and a horizontal plate are provided above each layer of the support platform. The horizontal plate is slidably assembled in the installation frame, and a plurality of turning teeth are fixedly installed at the bottom of the horizontal plate. The horizontal plate moves in the installation frame so that the turning teeth push the material in the tray, and the material can be turned over for more efficient baking.

[0018] Preferably, a connecting rod is vertically fixed between the two upper and lower adjacent mounting frames, and the connecting rod is slidably assembled inside the support platform, the top of the uppermost mounting frame is rotatably connected to an adjusting bolt, and the adjusting bolt is threadedly connected to the inside of the support frame, and a shift rod is fixedly connected to one end of the cross plate close to the mounting frame, and a ring sleeve matching the shift rod is fixedly connected to the push rod, and the end of the shift rod can be inserted into the ring sleeve when the cross plate is lowered. By inserting the shift rod into the ring sleeve, the push rod can push the shift rod to move synchronously with the cross plate when it moves, thereby turning the material.

[0019] Beneficial effects:

[0020] 1. When the present invention is in use, by adjusting the connecting area between the fixed air holes and the movable air holes on the side of the support platform, it is convenient to regulate the ventilation volume on each layer of the support platform, so that the temperature on each layer of the support platform is close to the same, reducing the temperature difference between the layers of the support platforms, and the swing of the air guide plate guides the direction of the hot air, evenly distributes the air on the support platform, so that the temperature of each area on the support platform is close to the same, so that the baking time of each layer of materials is close to the same, effectively reducing the probability of over-baking or under-baking, and improving the overall quality of the materials.

[0021] 2. When the present invention is in use, the transverse plate follows the movement of the push rod, so that the turning teeth turn the material, so that the hot air can flow better inside the material, and the material on the lower layer of the tray can also be better contacted with the hot air, and then the hot air bakes the material more evenly, shortening the baking time and improving the baking quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a perspective view of the present invention.

[0023] Figure 2 It is a structural schematic diagram of the interior of the furnace body of the present invention.

[0024] Figure 3 The present invention Figure 2 Schematic diagram of the enlarged structure at point A in the middle.

[0025] Figure 4 It is a three-dimensional diagram of a furnace body of the present invention.

[0026] Figure 5 The present invention Figure 4 Schematic diagram of the enlarged structure at point B in the middle.

[0027] Figure 6 It is a front cross-sectional view of a furnace body of the present invention.

[0028] Figure 7 The present invention Figure 6 Schematic diagram of the enlarged structure at point C in the middle.

[0029] Figure 8It is a schematic diagram of the internal structure of the side wind cavity of the present invention.

[0030] Fig. 9 It is a three-dimensional diagram of the bracket of the present invention.

[0031] Fig.10 It is a stereoscopic view of the mounting plate and the push rod of the present invention.

[0032] Reference numerals:

[0033] 10. Furnace body; 11. Upper air chamber; 12. Side air chamber; 13. Inlet pipe; 14. Exhaust pipe; 15. Fan; 16. Furnace door; 17. Mounting slot; 20. Bracket; 21. Support frame; 22. Support platform; 221. Vertical plate; 222. Thermometer; 223. Mounting frame; 224. Horizontal plate; 225. Turning tooth; 226. Connecting rod; 227. Adjusting bolt; 228. Push rod; 23. Tray; 30. Air outlet group Parts; 31, fixed plate; 32, movable plate; 321, support; 322, slide groove; 33, fixed air hole; 34, movable air hole; 40, adjustment mechanism; 41, screw rod; 42, threaded tube; 50, air guide assembly; 51, air guide plate; 511, transverse groove; 52, push rod; 521, side rod; 522, ring sleeve; 60, pushing mechanism; 61, reciprocating screw; 62, mounting plate; 63, slider; 64, first motor. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0035] like Figures 1 to 10 As shown, the baking oven of the present invention includes a furnace body 10, a bracket 20, an air outlet assembly 30, an adjusting mechanism 40 and an air guide assembly 50. The bracket 20 is arranged inside the furnace cavity of the furnace body 10 for placing materials. The air outlet assembly 30 and the adjusting mechanism 40 are located in the furnace wall of the furnace body 10. The air outlet assembly 30 introduces hot air into the furnace cavity of the furnace body 10 to bake the materials. The air outlet volume of the air outlet assembly 30 is adjusted by the adjusting mechanism 40. The air guide assembly 50 is arranged in the furnace cavity of the furnace body 10 for guiding the direction of hot air discharged from the air outlet assembly 30.

[0036] refer to Figure 1 and Figure 6The furnace wall of the furnace body 10 is provided with an upper air chamber 11 and a side air chamber 12. The upper air chamber 11 is located in the top wall of the furnace body 10, and the side air chamber 12 is located in the two opposite side walls of the furnace body 10. The upper air chamber 11 is connected to the side air chamber 12. An air inlet pipe 13 and an air outlet pipe 14 are respectively connected to the top of the furnace body 10, and the bottom end of the air inlet pipe 13 is connected to the upper air chamber 11, and the bottom end of the air outlet pipe 14 is connected to the furnace cavity of the furnace body 10. A fan 15 and a fuel gas are arranged inside the upper air chamber 11. The burning unit introduces air into the upper air chamber 11 through the air inlet pipe 13, the burning unit heats the air, and the fan 15 blows the hot air to form hot wind surging to the side air chamber 12, and the air outlet component 30 discharges the hot wind into the furnace cavity of the furnace body 10 to bake the materials in the bracket 20, and then the hot wind is discharged from the air outlet pipe 14 at the top of the furnace body 10. The furnace body 10 is also hinged with a furnace door 16 for closing the furnace cavity, and a mounting groove 17 is provided on the side wall of the furnace body 10 opposite to the furnace door 16.

[0037] refer to Figure 2 and Fig. 9 The bracket 20 is composed of a support frame 21 and a support platform 22. The support platform 22 has multiple layers and is fixed on the support frame 21 at equal distances from top to bottom. A tray 23 is provided on each layer of the support platform 22 for holding materials. A vertical plate 221 is fixedly installed on each layer of the support platform 22, and a thermometer 222 is provided on the vertical plate 221 for monitoring the temperature on each layer of the support platform 22.

[0038] refer to Fig. 9 A horizontal mounting frame 223 and a horizontal plate 224 are arranged above each layer of the support platform 22. The horizontal plate 224 is slidably assembled in the mounting frame 223, and a plurality of material turning teeth 225 are fixedly installed at the bottom of the horizontal plate 224. A connecting rod 226 is vertically fixed between the upper and lower adjacent mounting frames 223, and the connecting rod 226 is slidably assembled inside the support platform 22. The top of the uppermost mounting frame 223 is rotatably connected with an adjusting bolt 227, and the adjusting bolt 227 is threadedly connected to the inside of the support frame 21. The plate 224 is fixedly connected with a lever 228 at one end close to the mounting frame 223. By rotating the adjusting bolt 227, the connecting rod 226 can slide up and down in the support platform 22, and the height of the cross plate 224 and the material turning teeth 225 can be adjusted to insert the material turning teeth 225 into the material on the tray 23. Then, the cross plate 224 can be pushed to slide in the mounting frame 223, and the material can be turned over by the material turning teeth 225, so that the hot air can better enter the interior of the material, thereby improving the baking effect of the material.

[0039] refer to Figure 6-Figure 8There are multiple groups of air outlet components 30 corresponding to the multi-layer support platforms 22 one by one. The air outlet components 30 include a fixed plate 31 and a movable plate 32. The fixed plate 31 is fixedly installed on the inner wall of the furnace body 10. A fixed air hole 33 is provided inside the fixed plate 31 for connecting the furnace cavity of the furnace body 10 with the side air cavity 12. The movable plate 32 is slidably assembled inside the side air cavity 12 and is located on one side of the fixed plate 31. A movable air hole 34 adapted to the fixed air hole 33 is provided on the movable plate 32, so that after the movable air hole 34 is connected with the fixed air hole 33, the hot air in the side air cavity 12 can enter the furnace cavity to bake the material. When the movable plate 32 moves to make the movable air hole 34 and the fixed air hole 33 misaligned, the connecting area between the movable air hole 34 and the fixed air hole 33 is changed, and then the air intake of the fixed plate 31 can be adjusted.

[0040] refer to Figure 7 and Figure 8 A support 321 fixed to the inside of the side air chamber 12 is provided below the movable plate 32, a slide groove 322 is provided at the bottom of the movable plate 32 along its length direction, and the top of the support 321 is slidably connected to the inside of the slide groove 322, and the movable plate 32 is supported by the support 321, so that the movable plate 32 can slide on the support 321 through the slide groove 322 to adjust the hot air flow passing through the air outlet assembly 30.

[0041] refer to Figure 8 The adjusting mechanism 40 includes a screw rod 41 and a threaded barrel 42. The screw rod 41 is rotatably assembled inside the side air chamber 12. The threaded barrel 42 is threadedly connected to the outside of the screw rod 41, and the end of the threaded barrel 42 away from the screw rod 41 is fixedly connected to the movable plate 32. The screw rod 41 rotates to make the threaded barrel 42 slide outside the screw rod 41, driving the movable plate 32 to move, thereby misaligning the movable air hole 34 and the fixed air hole 33, changing the connection area between the movable air hole 34 and the fixed air hole 33, and then adjusting the flow rate of hot air, reducing the temperature difference between each layer of the support platform 22, and improving the baking effect of the material. The end of the screw rod 41 is provided with a second motor installed on the furnace body 10 to drive the screw rod 41 to rotate.

[0042] refer to Figure 5 and Figure 7The air guide assembly 50 includes an air guide plate 51 and a push rod 52. The air guide plate 51 is rotatably connected to the fixed plate 31. The push rod 52 is arranged in the furnace cavity of the furnace body 10, and the push rod 52 can slide forward and backward relative to the furnace body 10. A side rod 521 is fixedly connected to the push rod 52. A transverse groove 511 is opened on the top of the air guide plate 51 along its length direction. One end of the side rod 521 away from the push rod 52 is slidably connected to the inside of the transverse groove 511, so that when the push rod 52 moves in the furnace cavity, the side rod 521 slides along the transverse groove 511, driving the air guide plate 51 to rotate and swing on the fixed plate 31, guiding the exhaust direction of the hot air, and evenly arranging the hot air on each layer of the support platform 22.

[0043] refer to Figure 3 A ring sleeve 522 matched with the shift rod 228 is fixedly connected to the push rod 52, and the end of the shift rod 228 can be inserted into the ring sleeve 522 when the cross plate 224 descends, so that after the turning tooth 225 is inserted into the material, the shift rod 228 can be inserted into the ring sleeve 522, and then when the push rod 52 reciprocates, the ring sleeve 522 can drive the shift rod 228 and the cross plate 224 to move synchronously, and then the turning tooth 225 turns the material in the tray 23.

[0044] refer to Figure 6 and Figure 8 A pushing mechanism 60 is also provided inside the furnace body 10 for driving the push rod 52 to reciprocate inside the furnace body 10. The pushing mechanism 60 includes a reciprocating screw 61, a mounting plate 62, a slider 63 and a first motor 64. The reciprocating screw 61 is rotatably mounted on the side wall of the furnace body 10, and the mounting plate 62 is slidably connected in the mounting groove 17. The end of the push rod 52 is fixedly mounted on the mounting plate 62, and the slider 63 is fixedly mounted in the middle of the mounting plate 62. The slider 63 is arranged outside the reciprocating screw 61 and can reciprocate along the threaded groove on the reciprocating screw 61 as the reciprocating screw 61 rotates, thereby causing the mounting plate 62 to reciprocate with the push rod 52, so that the air guide plate 51 swings to guide the air. The first motor 64 is fixedly mounted on the furnace body 10, and the output end of the first motor 64 is coaxially fixed with the reciprocating screw 61, so that the reciprocating screw 61 can be driven by the first motor 64 to rotate.

[0045] Working principle: put the bracket 20 into the furnace cavity of the furnace body 10, rotate the adjusting bolt 227 to make the connecting rod 226 slide down in the support platform 22, adjust the height of the cross plate 224 and the material turning tooth 225, insert the material turning tooth 225 into the material on the tray 23, and insert the lever 228 into the ring sleeve 522, and then close the furnace door 16, introduce air into the upper air cavity 11 through the air inlet pipe 13, the combustion unit heats the air, and the fan 15 blows the hot air to form hot air surging to the side air cavity 12, and the hot air passes through the fixed air hole 33 and the movable air hole 34 and blows into each layer of the support platform 22 to bake the material;

[0046] The first motor 64 drives the reciprocating screw 61 to rotate, so that the slider 63 moves back and forth along the threaded groove on the reciprocating screw 61, and then the mounting plate 62 moves back and forth with the push rod 52. During the movement of the push rod 52, the side rod 521 slides along the transverse groove 511, driving the air guide plate 51 to rotate and swing on the fixed plate 31, guiding the discharge direction of the hot air, and making the ring sleeve 522 drive the lever 228 and the transverse plate 224 to move synchronously, and then the material turning teeth 225 turn over the material in the tray 23. The temperature on each layer of the support platform 22 is monitored by the thermometer 222, and the second motor drives the screw rod 41 to rotate, so that the threaded tube 42 slides outside the screw rod 41, driving the movable plate 32 to move, and then the movable air holes 34 and the fixed air holes 33 are misaligned, and the connecting area between the movable air holes 34 and the fixed air holes 33 is changed, and then the flow rate of the hot air is adjusted, and the air intake rate on each layer of the support platform 22 is adjusted, and then the temperature on the support platform 22 is regulated to make the temperature on each layer of the support platform 22 close to the same.

[0047] In the present invention, by adjusting the connecting area of ​​the fixed air holes 33 and the movable air holes 34 on the side of the support platform 22, it is convenient to regulate the ventilation volume on each layer of the support platform 22, so that the temperature on each layer of the support platform 22 is close to the same, and the temperature difference between each layer of the support platform 22 is reduced. The swing of the air guide plate 51 guides the direction of the hot air and evenly distributes the air on the support platform 22, so that the temperature of each area position on the support platform 22 is close to the same, so that the baking time of each layer of materials is close to the same, effectively reducing the probability of over-baking or under-baking, and improving the overall quality of the materials; the cross plate 224 moves with the push rod 52, so that the turning teeth 225 turn the materials, so that the hot air can better circulate inside the materials, and the materials in the lower layer of the tray 23 can also be better in contact with the hot air, and then the hot air bakes the materials more evenly, shortening the baking time and improving the baking quality.

[0048] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A baking oven, comprising an oven body and a support, wherein a multi-layer tray is arranged in the support, characterized in that: An upper air cavity is provided in the top wall of the furnace body for forming hot air, and side air cavities connected to the upper air cavity are provided in the left and right opposite side walls of the furnace body. An air outlet assembly is provided on the side of each tray layer for allowing the hot air in the side air cavity to enter the furnace cavity of the furnace body, and an air guide assembly is provided on the air outlet assembly for guiding the blowing direction of the hot air; The air outlet assembly includes a fixed plate and a movable plate. The fixed plate is fixedly mounted on the inner wall of the furnace body. A fixed air hole is provided inside the fixed plate to connect the side air cavity with the furnace cavity. The movable plate is slidably mounted inside the side air cavity and is located on one side of the fixed plate. A movable air hole matching the fixed air hole is provided on the movable plate. The air guide assembly includes an air guide plate and a push rod. The air guide plate is rotatably connected to the fixed plate. The push rod is arranged in the furnace cavity of the furnace body, and the push rod can slide forward and backward relative to the furnace body, thereby pushing the air guide plate to rotate on the fixed plate. The support is composed of a support frame and a support platform, wherein the support platform has multiple layers and is fixed on the support frame at equal distances from top to bottom; The push rod is fixedly connected to a side rod, a transverse groove is provided on the top of the air guide plate along its length direction, one end of the side rod away from the push rod is slidably connected inside the transverse groove, and a pushing mechanism is provided on one side of the push rod for driving the push rod to reciprocate in the furnace body to approach or move away from the furnace door; A transverse installation frame and a transverse plate are provided above each layer of the support platform. The transverse plate is slidably mounted in the installation frame, and a plurality of material turning teeth are fixedly installed at the bottom of the transverse plate. A connecting rod is vertically fixed between the two adjacent mounting frames, and the connecting rod is slidably assembled inside the support platform. The top of the uppermost mounting frame is rotatably connected with an adjusting bolt, and the adjusting bolt is threadedly connected inside the support frame. A shift rod is fixedly connected to one end of the cross plate close to the mounting frame, and a ring sleeve matching the shift rod is fixedly connected to the push rod, and the end of the shift rod can be inserted into the ring sleeve when the cross plate descends.

2. The baking oven according to claim 1, characterized in that: An air inlet pipe and an air outlet pipe are respectively inserted at the top of the furnace body, and the bottom end of the air inlet pipe is connected to the upper air cavity, and the bottom end of the air outlet pipe is connected to the furnace cavity of the furnace body. A fan and a combustion unit are arranged inside the upper air cavity.

3. The baking oven according to claim 2, characterized in that: A furnace door is hingedly connected to the furnace body, and a mounting groove is provided on a side wall of the furnace body opposite to the furnace door.

4. The baking oven according to claim 3, characterized in that: The tray is arranged on a supporting platform, and a vertical plate is fixedly installed on each supporting platform, and a thermometer is arranged on the vertical plate.

5. The baking oven according to claim 4, characterized in that: A support fixed in the side wind cavity is arranged below the movable plate, a slide groove is opened at the bottom of the movable plate along its length direction, and the top of the support is slidably connected inside the slide groove, and an adjustment mechanism is arranged on one side of the movable plate for pushing the movable plate to slide on the support.

6. The baking oven according to claim 5, characterized in that: The adjusting mechanism includes a screw and a threaded barrel. The screw is rotatably assembled inside the side air chamber. The threaded barrel is threadedly connected to the outside of the screw. One end of the threaded barrel away from the screw is fixedly connected to the movable plate. The end of the screw is provided with a second motor installed on the furnace body.

7. The baking oven according to claim 3, characterized in that: The pushing mechanism includes a reciprocating screw, a mounting plate, a slider and a first motor. The reciprocating screw is rotatably mounted on the side wall of the furnace body, the mounting plate is slidably connected in the mounting groove, the end of the push rod is fixedly mounted on the mounting plate, the slider is fixedly mounted in the middle of the mounting plate, and the slider is arranged outside the reciprocating screw. It can move back and forth along the threaded groove on the reciprocating screw as the reciprocating screw rotates. The first motor is fixedly mounted on the furnace body, and the output end of the first motor is coaxially fixed with the reciprocating screw.

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