Open type drying oven

Abstract

The utility model belongs to the technical field of traditional Chinese medicine decoction piece processing equipment, and particularly relates to an open type drying oven which comprises a drying oven body, a draught fan and an electric heating wire in a heating chamber work to form hot air flow, the hot air flow is blown into the drying oven body through an air guide pipe, traditional Chinese medicine materials on a drying disc are dried, and a motor is started to drive a lead screw to drive a moving block. A plurality of gears are driven by a plurality of racks on the moving rod to rotate at the same time, each gear drives a rotating frame through a first rotating shaft, a plurality of baking trays are driven by a plurality of rotating frames to turn over synchronously, and the baking trays can be turned over automatically at the same time. The drying duration and the starting time of turn-over work can be set through a control panel and an internal timer, the device is controlled to work, the control panel controls an alarm to remind workers when the work is completed, the medicinal materials can be automatically turned over through control, automatic reminding can be achieved after drying is completed, manpower consumption is avoided, and the energy of the workers is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of Chinese medicine slice processing equipment, and in particular relates to an open type drying oven. Background Art

[0002] During the processing of Chinese medicinal materials, the general process is selection, washing, boiling, drying and packaging. Because the boiled Chinese medicinal materials have moisture, they need to be dried using a drying device. The prior art generally uses an open oven. The operation process is to first lay the Chinese medicinal materials on the drying rack of the oven, and then start the oven for drying. However, it is inconvenient to turn the Chinese medicinal materials over during the drying process, which leads to problems such as uneven drying inside and outside and low drying efficiency.

[0003] In order to solve the above problems, a Chinese patent with publication number CN219223146U proposes an open type oven for processing Chinese medicinal materials, comprising a box body, a bracket, a connecting rope and an air inlet pipe are arranged on the box body, and the bracket is rotatably connected to the box body, a rocker and an insert are arranged on the bracket, and the insert is plug-in connected to a slot provided at the bottom of the tray, the rocker passes through the box body and is located at the upper part of the positive end of the box body, a cover plate is arranged on the tray, and the bottom end of the tray and the cover plate are both in a grid shape, a handle is arranged on the tray, a fixing groove is arranged on the tray, an I-shaped frame is arranged on the cover plate, a fixing block is arranged on the I-shaped frame, a hand-tightening bolt is screwed on the fixing block, a card slot is arranged on the box body, and the card slot is plug-in connected to the pin block, and the bracket and the box body are rotatably connected, so that when the tray supporting the Chinese medicinal materials is arranged on the upper end of the bracket, only the rocker is rotated, and the bracket can drive the tray to rotate to perform a flip operation on the Chinese medicinal materials. However, the above patent still requires manual turning of the bracket to turn the Chinese medicinal materials over during use, which not only consumes manpower but also requires manual control of the turning time, thereby consuming energy. Utility Model Content

[0004] The utility model provides an open oven, which solves the problem that an open oven for processing Chinese medicinal materials proposed in a Chinese patent with publication number CN219223146U still needs to be manually turned over by a bracket to turn over the Chinese medicinal materials during use, which not only consumes manpower but also requires manual control of the turning time, thereby consuming energy.

[0005] To achieve the above purpose, the utility model provides the following technical solutions: an open oven, comprising an oven, the oven opening is arranged upward, two parallel fixed blocks are fixed on the front side wall of the oven, a screw rod is arranged between the two fixed blocks for common rotation, the screw rod is arranged horizontally and both ends of the screw rod pass through the fixed blocks, one end of the screw rod is connected to the output end of the motor, a moving block is threadedly connected to the screw rod, a moving rod is fixed upward on the moving block, the moving rod is horizontally slidable on the front side wall of the oven, a plurality of racks are evenly and spaced apart on the top surface of the moving rod, and each of the racks is meshed with a gear , each of the gears is coaxially fixed with a rotating shaft 1 that passes through the front side wall of the oven, and a rotating rack is fixed on each of the rotating shafts 1 that extends into the interior of the oven, and the other end of the rotating rack is rotatably arranged on the rear side wall of the oven, and the rotating racks are provided with a plurality of rotating racks with the same inclination direction, and a baking tray is movably mounted on each of the rotating racks, and a fan is provided on the rear side of the oven, and the fan is connected to a heating chamber, and an electric heating wire is provided in the heating chamber; the heating chamber is connected to an air duct, and the other end of the air duct passes through the side wall of the oven forward, and a control panel and an alarm are provided on the front side of the oven, and a timer is provided in the control panel.

[0006] The beneficial effects of the utility model are as follows: by starting the fan to blow air into the heating chamber, and the electric heating wire in the heating chamber works to form a hot air flow, and then blown into the oven through the air guide pipe, the hot air flow automatically flows upward from the oven to dry the Chinese medicinal materials on the baking tray, and by starting the motor to drive the screw rod, thereby transmitting the shift block, thereby driving the shift rod to move horizontally, and then through the several racks on the shift rod, simultaneously transmitting the several gears to rotate synchronously, and then through the several gears, driving the several rotating racks to rotate synchronously, and then through the rotating rack, driving the several baking trays to turn over synchronously, it can be realized that several baking trays can be automatically turned over at the same time, and the drying time and the start time of the turning work can be set and the control device can be operated through the control panel and the internal timer, and when the drying is completed, the control panel will control the alarm to sound to remind the staff, and by being able to automatically control the turning over of the medicinal materials and automatically reminding after the drying is completed, it can avoid manpower consumption and can save the energy of the staff.

[0007] In order to achieve stable horizontal sliding of the shift rod, and thus maintain stable meshing transmission gears;

[0008] As a further improvement of the above technical solution: two protrusions 1 are fixed on the front side wall of the oven, the shift rod slides through the two protrusions 1, the bottom surfaces of the two ends of the shift rod are downwardly abutted against protrusions 2, and the protrusions 2 are fixed on the oven.

[0009] The beneficial effects of this improvement are: the second protrusion provides support for the shift rod, which facilitates the horizontal sliding of the shift rod, and the second protrusion supports the end of the shift rod to avoid deformation of the end of the shift rod, so that the shift rod can maintain engagement with the gear.

[0010] In order to realize the activity of the baking tray, it is installed on the rotating rack;

[0011] The cam is provided with a plurality of guide wheels, and the guide wheels are provided with a plurality of guide wheels respectively connected to the plurality of guide wheels, and the guide wheels are connected with a plurality of guide wheels respectively.

[0012] The beneficial effect of the present improvement is as follows: by pulling the shifting plate and the horizontal plate toward the vertical plate as a whole, the distance between the horizontal plate and the slot is increased until the distance can accommodate the baking tray and the baking tray is placed on the support plate, and then the shifting plate is released, and then, under the guidance of the slide bar and the elastic force of the spring, the shifting plate is pressed toward the front end of the baking tray and the rear end of the baking tray is pushed into the slot, and then the front end of the baking tray is limited by the shifting plate and the horizontal plate, and the rear end of the baking tray is limited by the slot, so that the baking tray can be installed on the rotating rack and can be disassembled by reverse operation.

[0013] To prevent the baking tray from sliding off the side of the rotating rack during the flipping process;

[0014] As a further improvement of the above technical solution: the top surface of the circular frame is higher than the top surface of the baking tray.

[0015] The beneficial effect of this improvement is that because the top surface of the circular frame is higher than the top surface of the baking tray, the left and right side walls of the circular frame limit the left and right sides of the baking tray to prevent the baking tray from sliding out of the side of the rotating frame during the turning process.

[0016] In order to fix the position of the medicinal materials during the turning process and prevent them from being piled up due to gravity;

[0017] As a further improvement of the above technical solution: the baking tray contains a circular plate one and a circular plate two which are completely overlapped, and the circular plate two is arranged above the circular plate one, the inner periphery of the circular plate one protrudes downward with a circular convex plate, the inner periphery of the bottom end of the circular convex plate is provided with an air permeable net one, and the circular plate two is provided with an air permeable net two at a position aligned with the air permeable net one.

[0018] The beneficial effect of this improvement is: first, the medicinal materials are evenly placed in the space surrounded by the circular convex plate and the air-permeable net one, and then the circular plate two is covered on the circular plate one, and then the front and rear ends of the circular plate one and the circular plate two are installed together on the rotating frame, so that the Chinese medicinal materials on the air-permeable net one can be pressed and fixed by the air-permeable net two on the circular plate two, so as to avoid the accumulation of medicinal materials due to displacement during the turning process.

[0019] In order to position the first circular plate and the second circular plate relative to each other, so as to facilitate the installation of the first circular plate and the second circular plate on the rotating frame;

[0020] As a further improvement of the above technical solution: four positioning blocks are fixed downwardly on the second circular plate, and the four positioning blocks are respectively clamped at four corner positions of the inner periphery of the first circular plate.

[0021] The beneficial effect of this improvement is that the first and second circular plates can be positioned relative to each other through the positioning block, thereby making it easier to install the first and second circular plates on the rotating frame.

[0022] In order to facilitate the rotation of the rotating rack in the oven;

[0023] As a further improvement of the above technical solution: bearings are respectively installed between the first rotating shaft, the second rotating shaft and the side wall of the oven.

[0024] The beneficial effect of this improvement is that the rotation resistance can be reduced by the bearing, so that the rotating rack can be easily rotated in the oven.

[0025] In order to dry the Chinese medicinal materials in the baking tray more evenly;

[0026] As a further improvement of the above technical solution: a circular tube is fixed inside the oven, and air outlet holes are evenly arranged on the inner periphery of the circular tube, and the circular tube is connected to the air guide pipe.

[0027] The beneficial effect of this improvement is that the hot air flow blown in from the air guide pipe can be evenly dispersed in the oven through the round-shaped tube and the air outlet holes evenly distributed on the round-shaped tube, thereby drying the Chinese medicinal materials in the baking tray more evenly.

[0028] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0030] Figure 1 Axonometric view of the appearance structure of the utility model Figure 1 ;

[0031] Figure 2 Axonometric view of the appearance structure of the utility model Figure 2 ;

[0032] Figure 3 It is a half-section diagram of the structure of some components of the utility model;

[0033] Figure 4 It is a three-dimensional cross-sectional view of some components of the utility model;

[0034] Figure 5 It is a schematic diagram of the structure of some components of the utility model;

[0035] Figure 6 This is a schematic diagram of the structure of components a and b of the utility model;

[0036] In the figure: 1, oven; 101, convex block 1; 102, convex block 2; 2, fixed block; 3, screw rod; 4, motor; 5, shift block; 6, shift rod; 601, rack; 7, gear; 701, shaft 1; 8, rotating frame; 801, circular frame; 802, vertical plate; 803, shift plate; 804, slide bar; 805, spring; 806, horizontal plate; 807, support plate; 808, slot; 809, shaft 2; 9, baking tray; 901, circular plate 1; 902, circular convex plate; 903, air permeable net 1; 904, circular plate 2; 905, air permeable net 2; 906, positioning block; 10, fan; 11, heating chamber; 12, air duct; 13, control panel; 14, alarm; 15, bearing; 16, circular tube; 1601, air outlet. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] Example 1

[0039] See also Figure 1-Figure 6The utility model provides the following technical solutions: an open oven, comprising an oven 1, the oven 1 is opened upward, two parallel fixed blocks 2 are fixed on the front side wall of the oven 1, a screw rod 3 is provided between the two fixed blocks 2 for common rotation, the screw rod 3 is horizontally arranged and both ends of the screw rod 3 pass through the fixed block 2, one end of the screw rod 3 is connected to the output end of the motor 4, a moving block 5 is threadedly connected to the screw rod 3, a moving rod 6 is fixed upward on the moving block 5, the moving rod 6 is horizontally slidably arranged on the front side wall of the oven 1, and a plurality of racks 601 are evenly and spaced apart on the top surface of the moving rod 6 Each of the racks 601 is meshed with a gear 7, and each of the gears 7 is coaxially fixed with a rotating shaft 701 that penetrates the front side wall of the oven 1, and each of the rotating shafts 701 extends to the inside of the oven 1 and is fixed with a rotating rack 8, and the other end of the rotating rack 8 is rotatably arranged on the rear side wall of the oven 1, and the rotating racks 8 are provided with a plurality of rotating racks 8 with the same inclination direction, and a baking tray 9 is movably installed on each of the rotating racks 8, and a fan 10 is provided on the rear side of the oven 1, and the fan 10 is connected to a heating chamber 11, and an electric heating wire is provided in the heating chamber 11; the heating chamber 11 is connected to an air duct 12, and the air duct The other end of the tube 12 penetrates the side wall of the oven 1 forwardly, and a control panel 13 and an alarm 14 are provided on the front side of the oven 1. A timer is provided in the control panel 13. The airflow is blown into the heating chamber 11 by starting the fan 10, and the electric heating wire in the heating chamber 11 works to form a hot airflow, which is then blown into the oven 1 through the air guide 12. The hot airflow automatically flows upward from the oven 1 to dry the Chinese medicinal materials on the baking tray 9. The screw rod 3 is driven by starting the motor 4, and then the shift block 5 is driven, and then the shift rod 6 is driven to move horizontally, and then the plurality of racks 601 on the shift rod 6 are simultaneously driven. A plurality of gears 7 rotate synchronously, and then a plurality of rotating racks 8 are driven to rotate synchronously through the plurality of gears 7, and then a plurality of baking trays 9 are driven to turn synchronously through the rotating racks 8, so that a plurality of baking trays 9 can be automatically turned over at the same time, and the drying time and the start time of the turning work can be set and the control device can be controlled through the control panel 13 and the internal timer. When the drying is completed, the control panel 13 will control the alarm 14 to make a sound to remind the staff. By automatically controlling the turning over of the medicinal materials and automatically reminding after the drying is completed, manpower can be avoided and the energy of the staff can be saved. Two protrusions 101 are fixed on the front side wall of the oven 1, and the shift rod 6 slides through the two protrusions 101. The bottom surfaces of the two ends of the shift rod 6 are downwardly abutted with protrusions 102, and the protrusions 102 are fixed on the oven 1; the protrusions 102 provide support for the shift rod 6 to facilitate the horizontal sliding of the shift rod 6, and the protrusions 102 support the end of the shift rod 6 to avoid deformation of the end of the shift rod 6, so that the shift rod 6 can remain engaged with the gear 7.The main body of the rotating frame 8 is provided with a circular frame 801, and a rotating shaft 1 701 is fixed in the middle of one end of the circular frame 801 and a rotating shaft 2 809 is fixed in the middle of the other end. The rotating shaft 2 809 and the rotating shaft 1 701 are both penetrated and rotatably arranged on the side wall of the oven 1. A vertical plate 802 is fixed upward at one end of the circular frame 801 close to the gear 7, and a vertical shifting plate 803 is parallelly arranged backward on the inner front side wall of the circular frame 801. A plurality of sliding rods 804 are arranged on the vertical plate 802 and the shifting plate 803 to slide forward and backward together. The two ends of the sliding rod 804 respectively penetrate the vertical plate 802 and the shifting plate 803 and are threadedly connected with nuts. The outer periphery of the sliding rod 804 is sleeved with a spring 805 located between the vertical plate 802 and the shifting plate 803. The shifting plate 803 is fixed with a horizontal plate 806 backward. The bottom ends of the front and rear sides of the inner periphery of the circular frame 801 are mutually fixed with horizontal support plates 80 7, a slot 808 is provided on one side of the inner periphery of the circular frame 801 near the second rotating shaft 809, a baking tray 9 is placed on the supporting plate 807, the shifting plate 803 and the horizontal plate 806 are movably engaged with the front end of the baking tray 9, and the slot 808 is engaged with the rear end of the baking tray 9; by pulling the shifting plate 803 and the horizontal plate 806 toward the vertical plate 802 as a whole, the distance between the horizontal plate 806 and the slot 808 is increased until the distance can accommodate the baking tray 9, and the baking tray 9 is placed. On the supporting plate 807, the shifting plate 803 is released, and then the shifting plate 803 is pressed toward the front end of the baking tray 9 by the guiding action of the sliding rod 804 and the elastic force of the spring 805, and the rear end of the baking tray 9 is pushed into the slot 808, and then the shifting plate 803 and the horizontal plate 806 limit the front end of the baking tray 9, and the slot 808 limits the rear end of the baking tray 9, so that the baking tray 9 is installed on the rotating frame 8, and the reverse operation can be removed. The top surface of the circular frame 801 is higher than the top surface of the baking tray 9; because the top surface of the circular frame 801 is higher than the top surface of the baking tray 9, the left and right side walls of the circular frame 801 limit the left and right sides of the baking tray 9 to prevent the baking tray 9 from sliding out of the side of the rotating frame 8 during the turning process. The baking tray 9 comprises a circular plate 901 and a circular plate 904 which are completely overlapped, and the circular plate 904 is arranged above the circular plate 901, and a circular convex plate 902 protrudes downward from the inner periphery of the circular plate 901, and a breathable net 903 is arranged on the inner periphery of the bottom end of the circular convex plate 902, and a breathable net 905 is arranged on the circular plate 904 in alignment with the breathable net 903; firstly, the medicinal materials are evenly placed in the space surrounded by the circular convex plate 902 and the breathable net 903, and then the circular plate 904 is covered above the circular plate 901, and then the front and rear ends of the circular plate 901 and the circular plate 904 are installed on the rotating frame 8 together, so that the Chinese medicinal materials on the breathable net 903 can be pressed and fixed by the breathable net 905 on the circular plate 904, so as to avoid the accumulation of the medicinal materials due to displacement during the turning process.Four positioning blocks 906 are fixed downwardly on the second circular plate 904, and the four positioning blocks 906 are respectively clamped at the four corner positions of the inner periphery of the first circular plate 901; the positioning blocks 906 can be used to position the first circular plate 901 and the second circular plate 904 relative to each other, thereby making it easier to install the first circular plate 901 and the second circular plate 904 on the rotating frame 8. Bearings 15 are respectively installed between the first rotating shaft 701, the second rotating shaft 809 and the side wall of the oven 1; the bearings 15 can reduce the rotation resistance, making it easier for the rotating frame 8 to rotate in the oven 1. A circular tube 16 is fixed inside the oven 1, and air outlet holes 1601 are evenly arranged on the inner periphery of the circular tube 16. The circular tube 16 is connected to the air duct 12. The hot air flow blown in from the air duct 12 is evenly dispersed in the oven 1 through the circular tube 16 and the air outlet holes 1601 evenly distributed on the circular tube 16, so that the Chinese medicinal materials in the baking tray 9 can be dried more evenly.

[0040] The working principle and use process of this utility model:

[0041] Put the Chinese medicinal materials into the baking tray 9: first, evenly put the medicinal materials into the space surrounded by the circular convex plate 902 and the air-permeable net 1 903, and then cover the circular plate 2 904 on the circular plate 1 901. During the process, the circular plate 2 904 and the circular plate 1 901 are positioned by the positioning block 906. The baking tray 9 is installed on the rotating frame 8: the shifting plate 803 and the horizontal plate 806 are pulled toward the vertical plate 802 as a whole, so that the distance between the horizontal plate 806 and the slot 808 becomes larger, until the distance can accommodate the baking tray 9, and the baking tray 9 is placed on the supporting plate 807, and then the shifting plate 803 is released, and then the shifting plate 803 is pressed toward the front end of the baking tray 9 under the guidance of the sliding rod 804 and the elastic force of the spring 805, and the rear end of the baking tray 9 is pushed into the slot 808, and then the front end of the baking tray 9 is limited by the shifting plate 803 and the horizontal plate 806, the rear end of the baking tray 9 is limited by the slot 808, and the left and right sides of the baking tray 9 are limited by the left and right side walls of the circular frame 801, so that the baking tray 9 is restricted on the rotating frame 8, and the air permeable net 2 905 and the air permeable net 1 903 in the baking tray 9 can press and fix the Chinese medicinal materials.

[0042] The drying time and the start time of the turning work can be set and the control device can be operated through the control panel 13 and the timer inside it, and when the drying is completed, the control panel 13 will control the alarm 14 to sound to remind the staff. During drying: start the fan 10 to blow air into the heating chamber 11, and the electric heating wire in the heating chamber 11 works to form a hot air flow, which is then blown into the round tube 16 through the air guide 12, and then evenly dispersed from the air outlet holes 1601 evenly distributed on the round tube 16 into the oven 1, and automatically flows upward to evenly dry the Chinese medicinal materials on the baking tray 9. When turning over is required: the motor 4 is started to drive the screw rod 3, which in turn drives the shift block 5, which in turn drives the shift rod 6 to move horizontally, and then drives a plurality of gears 7 to rotate synchronously through a plurality of racks 601 on the shift rod 6, and then drives a plurality of rotating racks 8 to rotate synchronously through a plurality of gears 7, and then drives a plurality of baking trays 9 to turn synchronously through the rotating rack 8, and it is preset that the baking trays 9 turn 180 degrees each time, and then automatically turns over a plurality of baking trays 9.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An open oven, characterized in that: The invention comprises an oven (1), wherein the oven (1) is opened upward, and two parallel fixed blocks (2) are fixed on the front side wall of the oven (1), and a screw rod (3) is provided between the two fixed blocks (2) for co-rotation, and the screw rod (3) is arranged horizontally and both ends of the screw rod (3) pass through the fixed blocks (2), and one end of the screw rod (3) is connected to the output end of a motor (4), and a moving block (5) is threadedly connected to the screw rod (3), and a moving rod (6) is fixed upward on the moving block (5), and the moving rod (6) is arranged horizontally and slidably on the front side wall of the oven (1), and a plurality of racks (601) are evenly and spacedly distributed on the top surface of the moving rod (6), and each of the racks (601) is meshed with a gear (7), and each of the gears (7) is coaxially fixed with a gear (6) passing through the front side wall of the oven (1). A rotating shaft (701) is provided, each of the rotating shafts (701) extending into the interior of the oven (1) and having a rotating rack (8) fixed thereon, the other end of the rotating rack (8) being rotatably arranged on the rear side wall of the oven (1), a plurality of rotating racks (8) being arranged with the same inclination direction, a baking tray (9) being movably mounted on each rotating rack (8), a fan (10) being arranged on the rear side of the oven (1), the fan (10) being connected to a heating chamber (11), an electric heating wire being arranged in the heating chamber (11); the heating chamber (11) being connected to an air duct (12), the other end of the air duct (12) penetrating the side wall of the oven (1) forward, a control panel (13) and an alarm (14) being arranged on the front side of the oven (1), a timer being arranged in the control panel (13).

2. An open oven according to claim 1, characterized in that: Two protrusions (101) are fixed on the front side wall of the oven (1), and the shift rod (6) slides through the two protrusions (101). The bottom surfaces of the two ends of the shift rod (6) are both in contact with protrusions (102) facing downward, and the protrusions (102) are both fixed on the oven (1).

3. An open oven according to claim 1, characterized in that: The main body of the rotating frame (8) is provided with a circular frame (801), a rotating shaft 1 (701) is fixed in the middle of one end of the circular frame (801) and a rotating shaft 2 (809) is fixed in the middle of the other end, the rotating shaft 2 (809) and the rotating shaft 1 (701) are both penetrated and rotatably arranged on the side wall of the oven (1), a vertical plate (802) is fixed upwardly at one end of the circular frame (801) close to the gear (7), a vertical shift plate (803) is parallelly arranged backward on the inner front side wall of the circular frame (801), a plurality of sliding rods (804) are arranged on the vertical plate (802) and the shift plate (803) so as to slide forward and backward together, and the two ends of the sliding rods (804) respectively penetrate the vertical plate (802) and the shift plate (803) ... The vertical plate (802) and the shifting plate (803) are connected with nuts through threads at the rear, the outer periphery of the sliding rod (804) is sleeved with a spring (805) located between the vertical plate (802) and the shifting plate (803), the shifting plate (803) is fixed with a horizontal plate (806) backward, the bottom ends of the front and rear sides of the inner periphery of the circular frame (801) are fixed with horizontal supporting plates (807) facing each other, the inner periphery of the circular frame (801) is provided with a clamping groove (808) on one side close to the second rotating shaft (809), a baking tray (9) is placed on the supporting plate (807), the shifting plate (803) and the horizontal plate (806) are movably clamped with the front end of the baking tray (9), and the clamping groove (808) is clamped with the rear end of the baking tray (9).

4. An open oven according to claim 3, characterized in that: The top surface of the circular frame (801) is higher than the top surface of the baking tray (9).

5. An open oven according to claim 1, characterized in that: The baking tray (9) comprises a circular plate 1 (901) and a circular plate 2 (904) which are completely overlapped, and the circular plate 2 (904) is arranged above the circular plate 1 (901), the inner periphery of the circular plate 1 (901) is provided with a circular convex plate (902) protruding downward, the inner periphery of the bottom end of the circular convex plate (902) is provided with a breathable net 1 (903), and the circular plate 2 (904) is provided with a breathable net 2 (905) at a position aligned with the breathable net 1 (903).

6. An open oven according to claim 5, characterized in that: The second circular plate (904) is fixed with four positioning blocks (906) downwardly, and the four positioning blocks (906) are respectively clamped at the four corner positions of the inner periphery of the first circular plate (901).

7. An open oven according to claim 3, characterized in that: Bearings (15) are respectively installed between the rotating shaft 1 (701), the rotating shaft 2 (809) and the side wall of the oven (1).

8. An open oven according to claim 1, characterized in that: A circular tube (16) is fixed inside the oven (1), and air outlet holes (1601) are evenly arranged on the inner periphery of the circular tube (16). The circular tube (16) is connected to the air guide pipe (12).

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