Dioscorea biscuit baking device

Abstract

The utility model discloses a kind of shanyao biscuit baking devices, including the baking barrel body with opening upwards, the cover plate that hinged connection baking barrel body top and can cover the opening of baking barrel body, circular baking tray fixed horizontally in the inside of baking barrel body, lifting top disc is arranged in baking barrel body and parallel to the lower side of circular baking tray, lifting device that driving lifting top disc parallel approaches or away from circular baking tray, rotating pipe is vertically rotated through the center of circular baking tray and lifting top disc and the barrel bottom wall of baking barrel body, rotating device that driving rotating pipe rotates, a pair of fixed connection shovel of rotating pipe outer side wall, gas pipe that hot gas is transported to rotating pipe interior, drawer is movably inserted in the side wall of baking barrel body and collects shanyao biscuit.The utility model has the advantages that: it has the effect of safe and convenient collection finished product shanyao biscuit.

Description

Technical Field

[0001] This utility model relates to the field of yam baking technology, and in particular to a yam biscuit baking device. Background Technology

[0002] Yam, a food with good nutritional value and health benefits, is often processed into various food products, among which yam cookies are a representative example. Currently, the processing of yam cookies requires baking to set their shape. Typically, the yam dough is manually placed in a baking pan according to a specific shape, and then the pan and dough are placed in the oven together for baking. After baking, the baking pan and cookies are manually removed. However, due to the extremely high surface temperature of the baking pan at the end of baking, workers are very likely to be burned while removing the pan. Furthermore, manually removing the cookies is not only time-consuming and inefficient, but also prone to damage if mistakes are made, leading to a lower yield of yam cookies. Utility Model Content

[0003] The purpose of this invention is to provide a yam biscuit baking device that can safely and conveniently collect finished yam biscuits.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a yam biscuit baking device, including an upward-opening baking barrel, a cover plate hinged to the top of the baking barrel and capable of covering the opening of the baking barrel, a circular baking tray horizontally fixed inside the baking barrel, a lifting top plate that is lifted and lowered inside the baking barrel and parallel to the bottom of the circular baking tray, a lifting device that drives the lifting top plate to move parallel to or away from the circular baking tray, a rotating tube that rotates vertically through the center of the circular baking tray, the lifting top plate and the bottom wall of the baking barrel, a rotating device that drives the rotating tube to rotate, a pair of spatulas fixedly connected to the outer wall of the rotating tube, a gas supply pipe that delivers hot air into the rotating tube, and a drawer that movably passes through the side wall of the baking barrel and collects yam biscuits.

[0005] The circular baking pan has multiple evenly spaced circular openings on its surface, and a circular protrusion that can be inserted into the circular opening is fixedly installed on the top of the lifting plate. The inner wall of the circular opening and the top of the circular protrusion together form a concave mold for accommodating the yam dough. The lower end of the rotating tube is located at the bottom of the baking barrel and is connected to the gas supply pipe through a rotary joint. The upper end of the rotating tube is located above the circular baking pan and continuously releases dry hot air from baking the biscuits. The spatula is located above the circular baking pan and can rotate to lift the yam biscuits on top of the circular baking pan. The circular baking pan has rectangular openings on both sides of the rotating tube. A rectangular discharge pipe is fixedly installed around the rectangular opening at the bottom of the circular baking pan, and the rectangular discharge pipe can be movably inserted through the lifting plate. The drawer is located below the lifting plate, and the top opening of the drawer catches the yam biscuits that fall from the rectangular discharge pipe. An exhaust pipe for venting the internal hot air is fixedly installed on the side wall of the baking barrel, and the exhaust pipe is located between the lifting plate and the drawer.

[0006] A further feature of this invention is that the cover plate is hollow inside, and the bottom of the cover plate has an air vent that connects the inside of the cover plate and the inside of the baking barrel. The bottom center of the cover plate has a circular groove for inserting the top of the rotating tube, and the air vents are evenly arranged around the circular groove. The bottom of the circular groove has an air inlet that connects the inside of the cover plate and the inside of the rotating tube.

[0007] A further feature of this invention is that the spatula includes a handle fixedly connected to the outer wall of the rotating tube at one end, and a blade fixedly connected to the side wall of the handle and inclined above the circular baking pan. The blades of the two spatulas are inclined in opposite directions and are respectively positioned above the two rectangular openings of the circular baking pan before operation.

[0008] A further feature of this invention is that a latch is installed between the cover plate and the baking barrel to fasten and secure the two, and a handle is fixedly provided on the top of the cover plate.

[0009] The present invention is further configured as follows: the lifting device includes a pair of vertically parallel lifting cylinders with their top ends fixedly connected to the bottom of the lifting plate; a pair of vertically rotating shafts mounted on the inner side wall of the baking barrel; a pair of screws respectively vertically fixed to the upper ends of the two rotating shafts and movably inserted into the interior of the two lifting cylinders; a nut fixed to the lower end of the lifting cylinder and threadedly connected to the screws; a pair of transmission gears respectively fixed on the two rotating shafts; a transmission gear ring rotatably mounted on the inner side wall of the baking barrel and simultaneously meshing with the two transmission gears; a control shaft rotatably passing through the wall of the baking barrel; a bevel gear one fixedly installed on the control shaft and located inside the baking barrel; a bevel gear two fixed on a rotating shaft and meshing with bevel gear one; and a handle fixedly connected to one end of the control shaft and located outside the baking barrel. An annular groove is formed on the inner side wall of the baking barrel, and the transmission gear ring is rotatably inserted into the annular groove.

[0010] The present invention is further configured as follows: it also includes an inner barrel, which is located inside the baking barrel body, below the lifting top plate and above the drawer. The baking barrel body is coaxial, and a conical connecting plate for guiding yam biscuits through the inner barrel is fixedly connected between the inner side wall of the baking barrel and the top of the inner barrel. An annular connecting plate for supporting the inner barrel is fixedly connected between the inner side wall of the baking barrel and the bottom of the inner barrel. A connecting pipe is fixedly provided between the outer side wall of the inner barrel and the inner side wall of the baking barrel, and the connecting pipe connects the vent pipe and the inside of the inner barrel. The lifting device is located in the gap between the outer side wall of the inner barrel and the inner side wall of the baking barrel. The nut, screw, rotating shaft, transmission gear, transmission gear ring, bevel gear one and bevel gear two in the lifting device are located between the conical connecting plate and the annular connecting plate one. The lifting cylinder in the lifting device slides through the conical connecting plate.

[0011] A further feature of this invention is that a pair of parallel annular connecting plates are fixedly connected between the inner wall of the baking barrel and the outer wall of the inner barrel, and the two annular connecting plates are located between the conical connecting plate and the first annular connecting plate. In the lifting device, the rotating shaft, transmission gear, transmission gear ring, first bevel gear and second bevel gear are located between the two annular connecting plates, and the screw and nut are located between the conical connecting plate and the second annular connecting plate. The lower end of the rotating shaft is rotatably connected to one annular connecting plate, and the lower end of the screw rotatably passes through another annular connecting plate and is fixedly connected to the upper end of the rotating shaft.

[0012] A further feature of this invention is that a spiral slide for winding a rotating tube is fixedly provided on the inner side wall of the inner tub, and the bottom end of the spiral slide is located above the opening of the drawer.

[0013] A further feature of this invention is that the rotating device includes a motor fixed to the bottom wall of the baking barrel, a drive gear fixed to the output end of the motor, and a driven gear fixed to the outer wall of the rotating barrel and meshing with the drive gear. The drive gear and the driven gear are located at the outer bottom of the baking barrel and mesh for transmission. The output end of the motor rotates through the bottom wall of the baking barrel and connects to the drive gear.

[0014] A further feature of this invention is that the drawer is semi-circular in shape, a semi-circular plate is fixedly installed on the inner side wall of the baking barrel, the semi-circular plate and the bottom of the drawer have the same shape and are symmetrical to each other on both sides of the rotating tube, a vertical partition is fixedly connected between the semi-circular plate and the bottom wall of the baking barrel, and the two ends of the partition are fixedly connected to the inner side wall of the baking barrel, one side of the partition and one side of the drawer are parallel to each other, and a gap for the rotating tube to pass through is reserved in the middle of both, and the motor is located below the semi-circular plate and on the side of the partition facing away from the drawer.

[0015] The beneficial effects of this invention are as follows: By using the above-mentioned baking device, when baking yam cookies, firstly, the yam dough is divided into small portions and pressed into the concave mold formed by the inner wall of the circular opening and the circular protruding top. Then, the lid of the top of the baking barrel is manually closed and the lock is fastened. Next, the hot air supply device connected to the air supply pipe is turned on, so that the air supply pipe and the rotating pipe send hot air for baking the yam dough into the baking barrel. Since the inside of the rotating pipe and the inside of the lid are connected through the air inlet, and the inside of the lid and the inside of the baking barrel are connected through the air outlet, the hot air sent out from the top of the rotating pipe will bake the yam dough in the circular opening from top to bottom through the air outlet at the bottom of the lid. At the same time, excess hot air will be discharged from the baking barrel through the rectangular opening, the rectangular pipe and the air outlet, thereby maintaining the temperature inside the baking barrel. The system balances the air pressure, ensuring a smooth flow of fresh hot air into the baking chamber. After the yam cookies are baked, the hot air supply stops, and the lifting device drives the lifting plate closer to the circular baking tray. This causes the circular protrusion on the lifting plate to extend further into the circular opening of the circular baking tray until the protrusion fills the opening and the top of the protrusion is flush with the top of the circular baking tray. At this point, the yam cookies are pushed out of the circular opening and arranged on the top of the circular baking tray. Finally, the rotating device drives the rotating tube to rotate, which in turn drives a pair of spatulas to remove the yam cookies adhering to the top of the circular protrusion and push them into the rectangular opening. After this, the yam cookies slide along the rectangular tube and the spiral set on the inner wall of the inner chamber, all flowing into the middle of the drawer for safe and convenient collection by the user.

[0016] The above-mentioned baking process for yam biscuits not only replaces the manual removal of baking trays and shovels of yam biscuits, thus avoiding safety accidents such as burns to workers, but also features a highly stable and fast automatic demolding process (circular protrusions push the yam biscuits out of the circular opening) and an automatic shovel process (rotating shovels lift and push the yam biscuits), which effectively improves the output efficiency and yield of yam biscuits. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0019] Figure 2 This is a cross-sectional view of the structure in this embodiment. Figure 1 ;

[0020] Figure 3 This is a cross-sectional view of the structure in this embodiment. Figure 2 ;

[0021] Figure 4 This is a schematic diagram showing the positional relationship between the circular baking pan and the spatula in this embodiment;

[0022] In the diagram, 1. Baking barrel; 1a. Exhaust pipe; 1b. Annular groove; 1c. Semi-circular arc plate; 1d. Partition; 2. Cover plate; 21. Exhaust hole; 22. Circular groove; 23. Inlet hole; 24. Handle; 3. Circular baking tray; 31. Circular opening; 32. Rectangular opening; 33. Rectangular discharge pipe; 4. Lifting top plate; 41. Circular protrusion; 5. Lifting device; 5a. Lifting cylinder; 5b. Rotating shaft; 5c. Screw; 5d. Nut; 5e. Transmission gear; 5f. 5g, Control shaft; 5h, Bevel gear one; 5i, Bevel gear two; 5j, Handle; 6, Rotating tube; 7, Rotating device; 71, Motor; 72, Driving gear; 73, Driven gear; 8, Shovel blade; 81, Shovel handle; 82, Shovel blade; 9, Air supply pipe; 91, Rotary joint; 10, Drawer; 11, Lock; 12, Inner barrel; 12a, Conical connecting plate; 12b, Annular connecting plate one; 12c, Connecting pipe; 12d, Annular connecting plate two; 12e, Spiral slide. Detailed Implementation

[0023] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0024] Example: A yam biscuit baking device, such as Figure 1-4 As shown, the oven includes an upward-facing baking drum body 1, a cover plate 2 hinged to the top of the baking drum body 1 and covering the opening of the baking drum body 1, a circular baking tray 3 horizontally fixed inside the baking drum body 1, a lifting top plate 4 raised and lowered inside the baking drum body 1 and parallel to the bottom of the circular baking tray 3, a lifting device 5 that drives the lifting top plate 4 to move parallel to or away from the circular baking tray 3, a rotating tube 6 that rotates vertically through the circular baking tray 3, the lifting top plate 4 and the center of the bottom wall of the baking drum body 1, a rotating device 7 that drives the rotating tube 6 to rotate, a pair of spatulas fixedly connected to the outer walls of the rotating tube 6, a gas supply pipe 9 that supplies hot air into the rotating tube 6, and a drawer 10 that moves through the side wall of the baking drum body 1 and collects yam biscuits.

[0025] The circular baking pan 3 has multiple evenly spaced circular openings 31 on its surface, and a circular protrusion 41 is fixedly installed on the top of the lifting plate 4 and can be inserted into the circular openings 31. The inner wall of the circular openings 31 and the top of the circular protrusion 41 together form a concave mold for accommodating the yam dough. The lower end of the rotating tube 6 is located at the bottom of the baking barrel 1 and is connected to the gas supply pipe 9 through a rotating joint 91. The upper end of the rotating tube 6 is located above the circular baking pan 3 and continuously releases dry hot air for baking cookies. The spatula 8 is located above the circular baking pan 3 and can rotate to lift the yam dough. The yam cookies are placed on the top of the round baking tray 3. The round baking tray 3 has rectangular openings 32 on both sides of the rotating tube 6. A rectangular discharge tube 33 is fixedly installed around the rectangular opening 32 at the bottom of the round baking tray 3, and the rectangular discharge tube moves through the lifting top plate. The drawer 10 is located below the lifting top plate 4, and the top opening of the drawer 10 catches the yam cookies that fall from the rectangular discharge tube 33. The side wall of the baking barrel 1 is fixedly installed with an exhaust pipe 1a to discharge the internal hot air, and the exhaust pipe 1a is located between the lifting top plate 4 and the drawer 10.

[0026] Furthermore, the cover plate 2 is hollow inside, and the bottom of the cover plate 2 has an air vent 21 that connects the inside of the cover plate 2 and the inside of the baking barrel 1. The bottom center of the cover plate 2 has a circular groove 22 for the top of the rotating tube 6 to be inserted, and each air vent 21 is evenly surrounding the circular groove 22. The bottom of the circular groove 22 has an air inlet 23 that connects the inside of the cover plate 2 and the inside of the rotating tube 6. By using the above-mentioned air vent 21, circular groove 22 and air inlet 23, the heat released from the top of the rotating tube 6 can be effectively dispersed, and the yam dough in each circular opening 31 can be evenly baked.

[0027] Furthermore, the spatula 8 includes a handle 81 fixedly connected to the outer wall of the rotating tube 6 at one end, and a spatula blade 82 fixedly connected to the side wall of the handle 81 and inclined above the circular baking pan 3. The spatula blades 82 of the two spatulas 8 are inclined in opposite directions and are respectively positioned above the two rectangular openings 32 of the circular baking pan 3 before operation. By adopting the above-mentioned spatula 8 structure, a stable and efficient shoveling and pushing effect for yam biscuits can be achieved.

[0028] Furthermore, a latch 11 is installed between the cover plate 2 and the baking drum 1 to fasten and secure the two together, and a handle 24 is fixedly provided on the top of the cover plate 2. By using the latch 11, the baking drum 1 can be effectively sealed to prevent hot air from escaping from the gap between the cover plate 2 and the baking drum 1; by using the handle 24, the user can easily flip the cover plate 2, and the user's fingers will be prevented from being pinched by the cover plate 2 and the baking drum 1.

[0029] Furthermore, the lifting device 5 includes a pair of vertically parallel lifting cylinders 5a with their top ends fixedly connected to the bottom of the lifting top plate 4, a pair of vertically rotating shafts 5b rotatably mounted on the inner wall of the baking barrel 1, a pair of screws 5c respectively vertically fixed to the upper ends of the two rotating shafts 5b and movably inserted into the interior of the two lifting cylinders 5a, a nut 5d fixed to the lower end of the lifting cylinder 5a and threadedly connected to the screws 5c, a pair of transmission gears 5e respectively fixed to the two rotating shafts 5b, a transmission gear ring 5f rotatably mounted on the inner wall of the baking barrel 1 and simultaneously meshing with the two transmission gears 5e, a control shaft 5g rotatably passing through the wall of the baking barrel 1, a bevel gear 5h fixedly mounted on the control shaft 5g and located inside the baking barrel 1, a bevel gear 5i fixedly mounted on a rotating shaft 5b and meshing with the bevel gear 5h, and a handle 5j fixedly connected to one end of the control shaft 5g and located outside the baking barrel 1. An annular groove 1b is formed on the inner wall of the baking barrel 1, and the transmission gear ring 5f is rotatably inserted into the annular groove 1b.

[0030] By employing the aforementioned lifting device 5, when it is necessary to control the lifting top plate 4 to move closer to or away from the circular baking pan 3, firstly, manually crank the handle 5j to rotate the control shaft 5g and bevel gear 5h. Then, bevel gear 5h meshes with transmission bevel gear 5i, causing a rotating shaft 5b, along with its screw 5c and transmission gear 5e, to rotate. Since the screw 5c movably inserts into a lifting cylinder 5a and is threadedly connected to the nut 5d at the lower end of the lifting cylinder 5a, the lifting cylinder 5a will slide up and down relative to the screw 5c under the rotation of the screw 5c. At the same time, another rotating shaft 5b and screw 5c will rotate synchronously under the meshing transmission of the two transmission gears 5e and the transmission gear ring 5f. Finally, the two lifting cylinders 5a will synchronously push upward or pull downward to slide the lifting top plate 4 up and down, making it parallel to move closer to or away from the circular baking pan 3.

[0031] Furthermore, it also includes an inner barrel 12, which is located inside the baking barrel 1, below the lifting top plate 4 and above the drawer 10. The baking barrel 1 is coaxial, and a conical connecting plate 12a is fixedly connected between the inner wall of the baking barrel 1 and the top of the inner barrel 12 to guide the yam biscuits through the inner barrel 12. An annular connecting plate 12b is fixedly connected between the inner wall of the baking barrel 1 and the bottom of the inner barrel 12 to support the inner barrel 12. The outer wall of the inner barrel 12 and the inner wall of the baking barrel 1 are jointly fixed. A connecting pipe 12c is provided, which connects the vent pipe 1a and the interior of the inner barrel 12. The lifting device 5 is located in the gap between the outer wall of the inner barrel 12 and the inner wall of the baking barrel 1. The nut 5d, screw 5c, rotating shaft 5b, transmission gear 5e, transmission gear ring 5f, bevel gear 1 5h, and bevel gear 2 5i in the lifting device 5 are located between the conical connecting plate 12a and the annular connecting plate 12b. The lifting cylinder 5a in the lifting device 5 slides through the conical connecting plate 12a. By using the aforementioned inner barrel 12, conical connecting plate 12a, and annular connecting plate 12b, some parts of the lifting device 5 can be effectively hidden and protected, preventing yam biscuit crumbs from getting stuck and affecting the safe meshing and transmission of the gears in the lifting device 5.

[0032] Furthermore, a pair of parallel annular connecting plates 12d are fixedly connected between the inner wall of the baking barrel 1 and the outer wall of the inner barrel 12. The two annular connecting plates 12d are located between the conical connecting plate 12a and the annular connecting plate 12b. In the lifting device 5, the rotating shaft 5b, the transmission gear 5e, the transmission gear ring 5f, the bevel gear 1 5h, and the bevel gear 2 5i are located between the two annular connecting plates 12d. The screw 5c and the nut 5d are located between the conical connecting plate 12a and the annular connecting plate 12d. The lower end of the rotating shaft 5b is rotatably connected to one annular connecting plate 12d, and the lower end of the screw 5c rotatably passes through the other annular connecting plate 12d and is fixedly connected to the upper end of the rotating shaft 5b. By using the above-mentioned annular connecting plates 12d, not only can the rotating shaft 5b be stably supported to rotate on the inner wall of the baking barrel 1, but the connection and fixation between the baking barrel 1 and the inner barrel 12 can also be further strengthened.

[0033] Furthermore, a spiral slide 12e for winding the rotating tube 6 is fixedly provided on the inner side wall of the inner tub 12, and the bottom end of the spiral slide 12e is located above the opening of the drawer 10. By using the spiral slide 12e, not only can the yam biscuits be guided into the drawer 10, but it can also effectively prevent the yam biscuits from falling into the drawer 10 from too high a height, thus preventing the yam biscuits from breaking.

[0034] Furthermore, the rotating device 7 includes a motor 71 fixed to the inner bottom wall of the baking barrel 1, a driving gear 72 fixed to the output end of the motor 71, and a driven gear 73 fixed to the outer wall of the rotating barrel and meshing with the driving gear 72. The driving gear 72 and the driven gear 73 are located at the outer bottom of the baking barrel 1 and mesh for transmission. The output end of the motor 71 rotates through the inner bottom wall of the baking barrel 1 and connects to the driving gear 72. By using the above-mentioned rotating device 7, when it is necessary to drive the rotating tube 6 to rotate, the motor 71 first drives the driving gear 72 to rotate, then the driving gear 72 meshes with the driven gear 73 to rotate, and finally the driven gear 73 drives the rotating tube 6 to rotate relative to the baking barrel 1.

[0035] Furthermore, drawer 10 is semi-circular in shape, and a semi-circular plate 1c is fixedly installed on the inner wall of the baking barrel 1. The semi-circular plate 1c and the bottom of drawer 10 have the same shape and are symmetrical to each other on both sides of the rotating tube 6. A vertical partition 1d is fixedly connected between the semi-circular plate 1c and the bottom wall of the baking barrel 1, and both ends of the partition 1d are fixedly connected to the inner wall of the baking barrel 1. One side of the partition 1d and one side of drawer 10 are parallel to each other, and a gap is reserved in the middle of both for the rotating tube 6 to pass through. The motor 71 is located below the semi-circular plate 1c and on the side of the partition 1d facing away from drawer 10. By using the above-mentioned semi-circular plate 1c and partition 1d, a space can be partitioned inside the baking barrel 1 to accommodate and house the motor 71, so as to ensure the stable operation of the motor 71.

[0036] The working principle of this embodiment:

[0037] When baking yam cookies, first divide the yam dough into small portions and press them into the concave mold formed by the inner wall of the circular opening 31 and the top of the circular protrusion 41. Then, manually close the lid 2 on top of the baking barrel 1 and fasten the lock 11. Next, turn on the hot air supply device connected to the gas supply pipe 9, so that the gas supply pipe 9 and the rotating pipe 6 send hot air into the baking barrel 1 to bake the yam dough. Since the inside of the rotating pipe 6 and the inside of the lid 2 are connected through the air inlet 23, and the inside of the lid 2 and the inside of the baking barrel are connected through the air outlet 21, the hot air sent out from the top of the rotating pipe 6 will bake the yam dough in the circular opening 31 from top to bottom through the air outlet 21 at the bottom of the lid 2. At the same time, the excess hot air will be discharged from the baking barrel 1 through the rectangular opening 32, the rectangular pipe and the air outlet 1a, thereby maintaining the air pressure balance inside the baking barrel 1 and ensuring the supply of new hot air. The yam cookies smoothly enter the baking chamber 1. After the yam cookies are baked, the hot air supply equipment stops working, and the lifting device 5 drives the lifting plate 4 to approach the circular baking tray 3. This causes the circular protrusion 41 on the lifting plate 4 to extend further into the circular opening 31 of the circular baking tray 3, until the circular protrusion 41 fills the circular opening 31 and the top of the circular protrusion 41 is flush with the top of the circular baking tray 3. At this time, the yam cookies will be pushed out from the circular opening 31 and arranged on the top of the circular baking tray 3. Finally, the rotating device 7 drives the rotating tube 6 to rotate, so that the rotating tube 6 drives a pair of spatulas 8 to remove the yam cookies that are attached to the top of the circular protrusion 41 and push them into the rectangular opening 32. After this, the yam cookies will slide along the rectangular tube and the spiral set on the inner wall of the inner chamber 12, and all of them will be collected in the middle of the drawer 10, so that the user can safely and conveniently collect the yam cookies.

Claims

1. A yam biscuit baking device, characterized in that, The oven includes an upward-facing baking barrel (1), a cover plate (2) that is hinged to the top of the baking barrel (1) and can cover the opening of the baking barrel (1), a circular baking tray (3) that is horizontally fixed inside the baking barrel (1), a lifting top plate (4) that is lifted and lowered inside the baking barrel (1) and parallel to the bottom of the circular baking tray (3), a lifting device (5) that drives the lifting top plate (4) to move parallel to or away from the circular baking tray (3), a rotating tube (6) that rotates vertically through the center of the bottom wall of the circular baking tray (3), the lifting top plate (4), and the baking barrel (1), a rotating device (7) that drives the rotating tube (6) to rotate, a pair of spatulas (8) that are fixedly connected to the outer wall of the rotating tube (6), a gas pipe (9) that delivers hot air into the rotating tube (6), and a drawer (10) that moves through the side wall of the baking barrel (1) and collects yam biscuits. The circular baking pan (3) has multiple circular openings (31) evenly distributed on its surface, and the top of the lifting plate (4) is fixedly provided with a circular protrusion (41) that can be inserted into the circular opening (31). The inner wall of the circular opening (31) and the top of the circular protrusion (41) together form a concave mold for accommodating yam dough. The lower end of the rotating tube (6) is located at the bottom of the baking barrel (1) and is connected to the gas supply pipe (9) through a rotating joint (91). The upper end of the rotating tube (6) is located above the circular baking pan (3) and continuously releases dry hot air for baking biscuits. The spatula (8) is located above the circular baking pan (3) and can rotate to lift the biscuit. The yam biscuits are placed on the top of the round baking pan (3). The round baking pan (3) has rectangular openings (32) on both sides of the rotating tube (6). The bottom of the round baking pan (3) is fixedly provided with a rectangular discharge tube (33) around the rectangular opening (32), and the rectangular discharge tube moves through the lifting top plate. The drawer (10) is located below the lifting top plate (4), and the top opening of the drawer (10) catches the yam biscuits falling from the rectangular discharge tube (33). The side wall of the baking barrel (1) is fixedly provided with an exhaust pipe (1a) to exhaust the internal heat, and the exhaust pipe (1a) is located between the lifting top plate (4) and the drawer (10).

2. The yam biscuit baking apparatus according to claim 1, characterized in that: The cover plate (2) is hollow inside, and the bottom of the cover plate (2) has an air vent (21) that connects the inside of the cover plate (2) and the inside of the baking barrel (1). The bottom center of the cover plate (2) has a circular groove (22) for the top of the rotating tube (6) to be inserted, and each air vent (21) is evenly surrounding the circular groove (22). The bottom of the circular groove (22) has an air inlet (23) that connects the inside of the cover plate (2) and the inside of the rotating tube (6).

3. The yam biscuit baking apparatus according to claim 1, characterized in that: The spatula (8) includes a handle (81) fixedly connected to the outer wall of the rotating tube (6) at one end, and a blade (82) fixedly connected to the side wall of the handle (81) and inclined above the circular baking pan (3). The blades (82) of the two spatulas (8) are inclined in opposite directions and are respectively positioned above the two rectangular openings (32) of the circular baking pan (3) before operation.

4. The yam biscuit baking apparatus according to claim 1, characterized in that: A latch (11) is installed between the cover plate (2) and the baking barrel (1) to fasten and fix the two together, and a handle (24) is fixedly provided on the top of the cover plate (2).

5. The yam biscuit baking apparatus according to claim 1, characterized in that: The lifting device (5) includes a pair of vertically parallel lifting cylinders (5a) with their top ends fixedly connected to the bottom of the lifting top plate (4), a pair of vertically rotating shafts (5b) rotatably mounted on the inner wall of the baking barrel (1), a pair of screws (5c) vertically fixed to the upper ends of the two rotating shafts (5b) and movably inserted into the two lifting cylinders (5a), a nut (5d) fixed to the lower end of the lifting cylinder (5a) and threadedly connected to the screws (5c), a pair of transmission gears (5e) fixed to the two rotating shafts (5b), and a rotatably mounted on the inner wall of the baking barrel (1) and simultaneously The baking barrel (1) has a transmission gear ring (5f) meshing with two transmission gears (5e), ​​a control shaft (5g) that rotates through the wall of the baking barrel (1), a bevel gear one (5h) fixedly installed on the control shaft (5g) and located inside the baking barrel (1), a bevel gear two (5i) fixed on a rotating shaft (5b) and meshing with bevel gear one (5h), and a handle (5j) fixedly connected to one end of the control shaft (5g) and located outside the baking barrel (1). The inner side wall of the baking barrel (1) has an annular groove (1b) and the transmission gear ring (5f) rotates and inserts into the annular groove (1b).

6. The yam biscuit baking apparatus according to claim 5, characterized in that: It also includes an inner barrel (12), which is located inside the baking barrel body (1), below the lifting top plate (4) and above the drawer (10). The baking barrel body (1) is coaxial, and a conical connecting plate (12a) for guiding yam biscuits through the inner barrel (12) is fixedly connected between the inner wall of the baking barrel body (1) and the top of the inner barrel (12). An annular connecting plate (12b) for supporting the inner barrel (12) is fixedly connected between the inner wall of the baking barrel body (1) and the bottom of the inner barrel (12). A connecting pipe is fixedly provided between the outer wall of the inner barrel (12) and the inner wall of the baking barrel body (1). (12c), and the connecting pipe (12c) connects the air outlet pipe (1a) and the interior of the inner barrel (12); the lifting device (5) is located in the gap between the outer wall of the inner barrel (12) and the inner wall of the baking barrel (1), and the nut (5d), screw (5c), rotating shaft (5b), transmission gear (5e), ​​transmission gear ring (5f), bevel gear one (5h) and bevel gear two (5i) in the lifting device (5) are located between the conical connecting plate (12a) and the annular connecting plate one (12b), and the lifting cylinder (5a) in the lifting device (5) slides through the conical connecting plate (12a).

7. The yam biscuit baking apparatus according to claim 6, characterized in that: A pair of parallel annular connecting plates (12d) are fixedly connected between the inner wall of the baking barrel (1) and the outer wall of the inner barrel (12). The two annular connecting plates (12d) are located between the conical connecting plate (12a) and the annular connecting plate (12b). In the lifting device (5), the rotating shaft (5b), the transmission gear (5e), ​​the transmission gear ring (5f), the bevel gear (5h) and the bevel gear (5i) are located between the two annular connecting plates (12d), and the screw (5c) and the nut (5d) are located between the conical connecting plate (12a) and the annular connecting plate (12d). The lower end of the rotating shaft (5b) is rotatably connected to an annular connecting plate (12d), and the lower end of the screw (5c) rotates through another annular connecting plate (12d) and is fixedly connected to the upper end of the rotating shaft (5b).

8. The yam biscuit baking apparatus according to claim 6, characterized in that: The inner wall of the inner tub (12) is fixedly provided with a spiral slide (12e) for winding the rotating tube (6), and the bottom end of the spiral slide (12e) is located above the opening of the drawer (10).

9. The yam biscuit baking apparatus according to claim 1, characterized in that: The rotating device (7) includes a motor (71) fixed on the inner bottom wall of the baking barrel (1), a drive gear (72) fixed on the output end of the motor (71), and a driven gear (73) fixed on the outer side wall of the rotating barrel and meshing with the drive gear (72). The drive gear (72) and the driven gear (73) are located at the outer bottom of the baking barrel (1) and mesh for transmission. The output end of the motor (71) rotates out through the inner bottom wall of the baking barrel (1) and connects to the drive gear (72).

10. A yam biscuit baking apparatus according to claim 9, characterized in that: The drawer (10) is semi-circular in shape. A semi-circular plate (1c) is fixedly installed on the inner wall of the baking barrel (1). The semi-circular plate (1c) and the bottom of the drawer (10) have the same shape and are symmetrical to each other on both sides of the rotating tube (6). A vertical partition (1d) is fixedly connected between the semi-circular plate (1c) and the bottom wall of the baking barrel (1). The two ends of the partition (1d) are fixedly connected to the inner wall of the baking barrel (1). One side of the partition (1d) and one side of the drawer (10) are parallel to each other, and a gap is reserved in the middle of both for the rotating tube (6) to pass through. The motor (71) is located below the semi-circular plate (1c) and on the side of the partition (1d) facing away from the drawer (10).

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