A tunnel oven for baking compressed biscuits by means of hot air circulation

Abstract

The present disclosure relates to the technical field of biscuit production equipment, and provides a compressed biscuit electric hot air circulation tunnel oven, which comprises a device main body; a mesh conveyor belt is arranged on the device main body in a circulating manner and is used for conveying biscuits; the mesh conveyor belt has a conveying section and a discharging section; the discharging section and the conveying section have an included angle therebetween; the discharging section is lower than the conveying section; a scraping plate is arranged on the device main body and located above the discharging section; one end of the scraping plate abuts against the discharging section and is used for scraping biscuits off the mesh conveyor belt; and a cleaning roller is arranged on the device main body and located below the discharging section; the cleaning roller is provided with bristles and is used for cleaning the mesh conveyor belt after the mesh conveyor belt passes through the scraping plate. Through the above technical scheme, the technical problem that biscuits completed by baking in the prior art are inconvenient to clean after being discharged and remaining on the conveyor belt is solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of biscuit production equipment technology, and more specifically, to a compressed biscuit electric hot air circulating oven tunnel oven. Background Technology

[0002] In the production of compressed biscuits, the electric hot air circulating oven tunnel oven plays a crucial role. However, in existing ovens of this type, after the biscuits are baked and then unloaded, they are prone to breakage and sticking. This not only affects the product's appearance but may also lead to a decline in product quality and an increase in the defect rate. For example, traditional unloading methods often rely on simple gravity sliding. This method cannot guarantee that the biscuits will fall off the conveyor belt, and the biscuit residue left on the conveyor belt after falling is extremely difficult to clean. Biscuit residue may get stuck in the gaps and holes of the conveyor belt or stick to the surface. Common cleaning methods are not only inefficient and labor-intensive but may also cause secondary damage to the conveyor belt during the cleaning process, shortening its lifespan. These residual biscuit crumbs not only affect the cleanliness of subsequent products but may also breed bacteria, posing a potential threat to food safety. Furthermore, they can interfere with the normal operation of the conveyor belt, increase the risk of equipment failure, and reduce production efficiency. Utility Model Content

[0003] To overcome the above-mentioned defects, the embodiments of this disclosure provide a compressed biscuit electric hot air circulating oven tunnel oven, which solves the technical problem in the prior art that biscuit residue on the conveyor belt after baking is difficult to clean.

[0004] According to one aspect, at least one embodiment of this disclosure provides a compressed biscuit electric hot air circulating oven tunnel oven, comprising: Main body of the device; A perforated conveyor belt is circulated and moved on the main body of the device for conveying biscuits. The perforated conveyor belt has a conveying section and a feeding section. The feeding section and the conveying section have an angle between them, and the feeding section is lower than the conveying section. A scraper is mounted on the main body of the device and located above the feeding section. One end of the scraper abuts against the feeding section and is used to scrape the biscuit off the mesh conveyor belt. A cleaning roller is mounted on the main body of the device and located below the feeding section. The cleaning roller has bristles and is used to clean the mesh conveyor belt after it has passed the scraper.

[0005] For example, in a compressed biscuit electric hot air circulating oven tunnel oven provided in at least one embodiment of this disclosure, the cleaning roller is rotatably disposed on the main body of the device, and the bristles are evenly distributed along the circumference of the cleaning roller.

[0006] For example, in a compressed biscuit electric hot air circulating oven tunnel oven provided in at least one embodiment of this disclosure, the cleaning roller has a cavity inside, one end of the cavity is connected to an external air source through a rotating sealing device, and the side wall of the cleaning roller also has a plurality of air outlets, which are connected to the cavity and are used to blow the debris brushed off by the brush off the mesh conveyor belt and blow it toward the bottom surface of the scraper plate.

[0007] For example, in a compressed biscuit electric hot air circulating oven tunnel oven provided in at least one embodiment of this disclosure, there is an angle between the scraper and the feeding section.

[0008] For example, in at least one embodiment of this disclosure, a compressed biscuit electric hot air circulating tunnel oven further includes: A number of striking rods are provided, and the striking rods are hinged to the cleaning roller. The striking rods are arranged such that the cleaning roller strikes the mesh conveyor belt in sequence after it rotates. A torsion spring is provided at the hinge of the striking rod to provide the force for the striking rod to return to its original position after striking the mesh conveyor belt.

[0009] For example, in at least one embodiment of this disclosure, a compressed biscuit electric hot air circulating tunnel oven further includes: A receiving box is disposed on one side of the main body of the device, below the unloading section; A partition is provided inside the receiving box, which divides the interior of the receiving box into a first cavity and a second cavity. The end of the scraper away from the mesh conveyor belt is connected to the top of the partition. The partition is arranged such that the biscuit passing over the top surface of the scraper enters the first cavity, and the debris blown towards the bottom surface of the scraper enters the second cavity.

[0010] For example, in at least one embodiment of the present disclosure, a compressed biscuit electric hot air circulating tunnel oven further includes: A cleaning ring is slidably disposed on the cleaning roller along the axis of the cleaning roller, and the cleaning ring is arranged to clean a number of the bristles in sequence after sliding.

[0011] For example, in at least one embodiment of this disclosure, a compressed biscuit electric hot air circulating tunnel oven further includes: A chip collection trough is disposed below the cleaning roller and is used to collect the debris that falls off the cleaning roller.

[0012] For example, in at least one embodiment of this disclosure, a compressed biscuit electric hot air circulating tunnel oven further includes: A cleaning brush is slidably disposed in the chip collection groove, the cleaning brush is connected to the cleaning ring, and the cleaning brush is arranged to slide synchronously with the cleaning ring.

[0013] For example, in at least one embodiment of this disclosure, a compressed biscuit electric hot air circulating tunnel oven further includes: A protective plate is provided on both sides of the scraper to prevent the biscuit from detaching from the scraper.

[0014] The beneficial effects of the embodiments disclosed herein are as follows: In this disclosure, by setting the angle between the feeding section 202 and the conveying section 201 and using the scraper 3, the feeding efficiency and success rate of biscuits are effectively improved by utilizing gravity and the scraper 3. Biscuits can detach from the conveyor belt more smoothly, reducing biscuit sticking. The brush bristles 401 can penetrate deep into the mesh of the mesh conveyor belt 2 to brush off residual biscuit crumbs. Timely cleaning of biscuit residue on the conveyor belt prevents bacterial growth from residual biscuit crumbs, ensuring the cleanliness and food safety of subsequent products. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0016] Figure 1 This is a schematic diagram of the structure of a compressed biscuit electric hot air circulating oven tunnel oven in one embodiment of the present disclosure; Figure 2 for Figure 1 A schematic diagram of another angle of the structure of a compressed biscuit electric hot air circulating oven tunnel oven in one embodiment; Figure 3 for Figure 1 A schematic diagram of the internal structure of a compressed biscuit electric hot air circulating oven tunnel oven in one embodiment; Figure 4 for Figure 3 Enlarged view of point A in the middle.

[0017] In the diagram: 1. Main body of the device; 2. Mesh conveyor belt; 201. Conveying section; 202. Discharging section; 3. Scraper; 4. Cleaning roller; 401. Brush bristles; 402. Cavity; 403. Air outlet; 5. Striking rod; 6. Receiving box; 7. Partition; 601. First cavity; 602. Second cavity; 8. Cleaning ring; 9. Chip collection trough; 10. Cleaning brush; 11. Guard plate. Detailed Implementation The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0018] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0019] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0020] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0021] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0022] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] like Figures 1-4 As shown, the compressed biscuit electric hot air circulating oven tunnel oven in this embodiment mainly consists of a main body 1, a mesh conveyor belt 2, a scraper 3, and a cleaning roller 4. The main body 1 serves as a supporting structure, providing space and a platform for the installation and operation of other components.

[0024] A perforated conveyor belt 2 is cyclically mounted on the main body 1 and driven by a drive unit to form a continuous cyclic motion for conveying biscuits. The perforated conveyor belt 2 has a conveying section 201 and a feeding section 202. The conveying section 201 transports the biscuits to be baked from the inlet end of the oven to the baking area. After baking, the biscuits move along the conveyor belt to the feeding section 202. The feeding section 202 forms a certain angle with the conveying section 201, and the feeding section 202 is lower than the conveying section 201. This design utilizes gravity to help the biscuits more easily detach from the conveyor belt when they reach the feeding section 202.

[0025] The scraper 3 is installed on the main body 1 of the device and is positioned above the feeding section 202. One end of the scraper 3 is in close contact with the surface of the conveyor belt of the feeding section 202. When the biscuit moves to the feeding section 202 with the conveyor belt, the scraper 3 can contact the biscuit and scrape the biscuit off the mesh conveyor belt 2.

[0026] The cleaning roller 4 is mounted on the main body 1 of the device and located below the feeding section 202. The cleaning roller 4 is equipped with bristles 401. When the mesh conveyor belt 2, after the scraper plate 3 has removed the biscuits, moves to the position of the cleaning roller 4, the bristles 401 can clean the conveyor belt and remove the remaining biscuit crumbs.

[0027] Specifically, the compressed biscuits to be baked are placed on the conveyor section 201 of the mesh conveyor belt 2. The drive device drives the conveyor belt to move in a cycle, transporting the biscuits to the baking area of ​​the oven for heating and baking. During the baking process, the biscuits gradually complete the baking process as they move along the conveyor belt.

[0028] After baking, the biscuits move along the conveyor belt to the unloading section 202. When the biscuits pass the scraper 3, the scraper 3 contacts the biscuits and scrapes off the biscuits that are still stuck to the conveyor belt, so that the biscuits can be easily removed from the conveyor belt.

[0029] After the biscuit crumbs are scraped off, the mesh conveyor belt 2 continues to move above the cleaning roller 4. The bristles 401 on the cleaning roller 4 come into contact with the conveyor belt and clean it, brushing off any remaining biscuit crumbs. During this process, the conveyor belt continues to move, and the cleaning roller 4 continuously cleans the conveyor belt.

[0030] The advantage lies in addressing the problem of biscuit sticking during feeding in existing technologies. This oven, by setting the angle between the feeding section 202 and the conveying section 201, and utilizing the scraper 3, effectively improves the feeding efficiency and success rate of biscuits through gravity and the action of the scraper 3. Biscuits can detach from the conveyor belt more smoothly, reducing sticking. The brush bristles 401 can penetrate deep into the mesh of the mesh conveyor belt 2 to brush off residual biscuit crumbs. Timely cleaning of biscuit residue on the conveyor belt prevents bacterial growth from residual biscuit crumbs, ensuring the cleanliness and food safety of subsequent products.

[0031] like Figures 3-4 As shown, the cleaning roller 4 is rotatably mounted on the main body 1 of the device via bearings. The main body 1 of the device is provided with a special mounting seat for mounting the bearings to ensure that the cleaning roller 4 can rotate. The bristles 401 are evenly distributed around the circumference of the cleaning roller 4. This layout allows the bristles 401 to contact the mesh conveyor belt 2 evenly during the rotation of the cleaning roller 4.

[0032] As the perforated conveyor belt 2 moves in a cycle, the drive device drives the cleaning roller 4 to rotate. With the rotation of the cleaning roller 4, the circumferentially distributed bristles 401 sequentially contact the perforated conveyor belt 2. The uniform distribution of the bristles 401 allows for comprehensive cleaning of the conveyor belt surface during the rotation of the cleaning roller 4.

[0033] The advantage lies in the fact that the rotating arrangement of the cleaning roller 4 and the circumferentially even distribution of the bristles 401 greatly improve cleaning efficiency. Compared with a stationary cleaning method, the rotating cleaning roller 4 can clean the conveyor belt more quickly and comprehensively. The circumferentially evenly distributed bristles 401 make the cleaning process more uniform, avoid cleaning dead spots, and ensure that every part of the conveyor belt is cleaned.

[0034] like Figures 3-4 As shown, a cavity 402 is created inside the cleaning roller 4 to more effectively clean biscuit crumbs from the mesh conveyor belt 2. The cleaning roller 4 is connected to an external air source via a rotating sealing device.

[0035] The rotating sealing device can be a rotary sealing joint, mainly composed of a fixed base, a rotating sleeve, and a sealing element. The fixed base is installed on the main body 1 of the device and connected to an external air source, with an internal channel for gas flow. The rotating sleeve is fitted onto the end of the cleaning roller 4 and can rotate with the cleaning roller 4. The sealing element is located between the fixed base and the rotating sleeve, and its function is to prevent gas leakage while ensuring that the cleaning roller 4 can rotate freely. The sealing element can be a multi-layer sealing ring.

[0036] Several air outlets 403 are distributed on the side wall of the cleaning roller 4, and these air outlets 403 are connected to the internal cavity 402. The air outlets 403 are evenly distributed on the side wall of the cleaning roller 4, and the direction of the air outlets 403 is towards the bottom surface of the scraper plate 3.

[0037] Specifically, when the oven starts operating, an external gas source is connected to the fixed seat of the rotating sealing device via a pipe, and the gas enters the channel inside the fixed seat. Due to the sealing effect, the gas will not leak into the external environment. The cleaning roller 4 starts to rotate under the drive of the drive device, and the rotating sleeve rotates with the cleaning roller 4. The gas enters the rotating sleeve from the channel of the fixed seat through the sealing element, and then enters the cavity 402 inside the cleaning roller 4. During the rotation of the cleaning roller 4, the bristles 401 on its surface clean the passing mesh conveyor belt 2, brushing off the remaining biscuit crumbs. At the same time, the gas in the cavity 402 is ejected through the air outlet 403. Since the air outlet 403 is oriented towards the bottom surface of the scraper plate 3, the ejected gas blows the brushed-off crumbs away from the mesh conveyor belt 2 and towards the bottom surface of the scraper plate 3. Under the action of gravity, these crumbs slide down the bottom surface of the scraper plate 3, facilitating subsequent collection.

[0038] The advantage is that this application, by setting a cavity 402 and an air outlet 403 inside the cleaning roller 4 and using a rotating sealing device to connect to an external air source, allows gas to be ejected from the air outlet 403, blowing the brushed debris away from the conveyor belt. This cleaning method is more thorough than simply relying on the brush bristles 401. The air outlet 403 is designed to face the bottom surface of the scraper plate 3, so that the debris can be concentrated and blown to one area, facilitating subsequent collection and processing.

[0039] like Figures 3-4 As shown, the scraper 3 and the mesh conveyor belt 2 of the feeding section 202 form an angle, which can effectively scrape the biscuits off the conveyor belt without causing excessive wear to the conveyor belt.

[0040] Specifically, when the biscuit moves along the mesh conveyor belt 2 to the unloading section 202 and passes the scraper 3, the scraper 3 can better cut into the adhesive part between the biscuit and the conveyor belt under the action of this angle, and scrape the biscuit off smoothly.

[0041] like Figures 3-4 As shown, several striking rods 5 are hinged to the cleaning roller 4 via hinge shafts. A torsion spring is installed at the hinge point, with one end fixed to the striking rod 5 and the other end fixed to the cleaning roller 4. The striking rods 5 strike the conveyor belt when the cleaning roller 4 rotates.

[0042] Specifically, as the cleaning roller 4 rotates, the striking rod 5 moves along with it. Due to centrifugal force and the action of the torsion spring, the striking rod 5 strikes the mesh conveyor belt 2 sequentially. After each strike, the restoring force provided by the torsion spring returns the striking rod 5 to its initial position, awaiting the next strike. During the continuous rotation of the cleaning roller 4, the striking rod 5 continuously strikes the conveyor belt, causing the biscuit crumbs adhering to the conveyor belt to loosen due to vibration.

[0043] The advantage is that the combination of the striking rod 5 and the torsion spring enhances the cleaning effect on the mesh conveyor belt 2. The vibration generated by the striking loosens the tightly bound biscuit crumbs, making them easier for the brush bristles 401 and air to remove. This vibration cleaning method improves the thoroughness of the cleaning.

[0044] like Figures 2-4 As shown, the receiving box 6 is located on one side of the main body 1 of the device, below the unloading section 202. A partition 7 is installed inside the receiving box 6, dividing the interior of the receiving box 6 into a first cavity 601 and a second cavity 602. The end of the scraper 3 furthest from the mesh conveyor belt 2 is connected to the top of the partition 7.

[0045] Specifically, the biscuits scraped off by the scraper 3 slide down the top surface of the scraper 3 and enter the first chamber 601 for collection. Meanwhile, biscuit crumbs blown towards the bottom surface of the scraper 3 by the air outlet 403 on the cleaning roller 4 slide down the bottom surface of the scraper 3 under gravity and enter the second chamber 602. In this way, the biscuits and biscuit crumbs can be collected separately into different chambers, achieving classified collection.

[0046] The advantage is that separate collection facilitates different treatments for products and waste, improving production efficiency and management convenience.

[0047] like Figures 3-4 As shown, the cleaning ring 8 is slidably mounted on the cleaning roller 4 along the axial direction of the cleaning roller 4. The inner diameter of the cleaning ring 8 matches the outer diameter of the cleaning roller 4. The inner side of the cleaning ring 8 is provided with soft bristles 401 or sponge strips, which can clean the bristles 401 during sliding.

[0048] Specifically, when it is necessary to clean the bristles 401 on the cleaning roller 4, the drive device drives the cleaning ring 8 to slide along the axis of the cleaning roller 4. The drive device can be a lead screw and nut, or a rodless cylinder or a slide rail. During the sliding process, the inner side of the cleaning ring 8 contacts the bristles 401, removing the biscuit crumbs and oil stains adhering to the bristles 401. The cleaning ring 8 passes through each group of bristles 401 in sequence, ensuring that all bristles 401 are thoroughly cleaned.

[0049] The advantage is that the cleaning ring 8 ensures the cleanliness of the bristles 401 of the cleaning roller 4. Over time, biscuit crumbs and oil stains may accumulate on the bristles 401, affecting cleaning performance. The sliding cleaning action of the cleaning ring 8 effectively removes these residues, maintaining the bristles 401's excellent cleaning performance. This not only extends the service life of the cleaning roller 4 but also ensures continuous and efficient cleaning of the mesh conveyor belt 2.

[0050] like Figures 3-4 As shown, the chip collection trough 9 is located below the cleaning roller 4, and its shape and size are adapted to the cleaning roller 4 to completely catch the biscuit crumbs falling from the cleaning roller 4. The inner wall of the chip collection trough 9 is smooth, which facilitates the sliding and collection of crumbs.

[0051] Specifically, when the cleaning ring 8 cleans the bristles 401 on the cleaning roller 4, the cleaned cookie crumbs fall into the crumb collection trough 9. The crumb collection trough 9 can collect these crumbs, preventing them from scattering inside the oven and affecting the normal operation and hygiene of the oven.

[0052] The advantage is that the crumb collection trough 9 facilitates the centralized collection and handling of cookie crumbs. Concentrating the fallen crumbs in the crumb collection trough 9 reduces the difficulty and workload of cleaning.

[0053] like Figures 3-4 As shown, the cleaning brush 10 is slidably disposed within the chip collection groove 9. The cleaning brush 10 is connected to the cleaning ring 8 via a connecting rod or other structure, ensuring that the cleaning brush 10 can slide synchronously with the cleaning ring 8. The bristles 401 of the cleaning brush 10 contact the inner wall of the chip collection groove 9, enabling it to clean the inner wall of the chip collection groove 9.

[0054] The advantage lies in the synchronous sliding design of the cleaning brush 10 and the cleaning ring 8, which enables simultaneous cleaning of the bristles 401 of the cleaning roller 4 and the chip collection groove 9. Cleaning the chip collection groove 9 simultaneously with cleaning the cleaning roller 4 improves cleaning efficiency and reduces manual cleaning workload. At the same time, it ensures the cleanliness of the chip collection groove 9, preventing the accumulation of debris within it.

[0055] like Figures 2-4 As shown, guard plates 11 are arranged on both sides of the scraper plate 3, and the guard plates 11 are perpendicularly connected to the scraper plate 3 to form a relatively closed channel. The height and length of the guard plates 11 are designed according to the size of the scraper plate 3 and the size of the biscuit, which can effectively prevent the biscuit from falling off the scraper plate 3 to the sides.

[0056] Specifically, when the biscuit slides down the top surface of the scraper 3, the guard plate 11 can prevent the biscuit from moving to the sides of the scraper 3. The biscuit can only slide down in the channel formed by the guard plate 11 and the scraper 3, and finally smoothly enter the first cavity 601 of the receiving box 6.

[0057] The advantage is that the guard plate 11 prevents the cookies from detaching from the scraper plate 3 during the scraping process, thus improving the success rate of cookie collection. It ensures that all scraped cookies can accurately enter the collection bin 6, reducing cookie waste and pollution to the oven's internal environment.

[0058] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A tunnel oven for baking compressed biscuits using electric hot air circulation, characterized in that, include: Device body (1); A mesh conveyor belt (2) is circulated and moved on the main body (1) of the device for conveying biscuits. The mesh conveyor belt (2) has a conveying section (201) and a feeding section (202). The feeding section (202) and the conveying section (201) have an angle between them. The feeding section (202) is lower than the conveying section (201). Scraper (3), the scraper (3) is disposed on the main body (1) of the device and located above the feeding section (202). One end of the scraper (3) abuts against the feeding section (202) and is used to scrape the biscuit off the mesh conveyor belt (2). Cleaning roller (4), the cleaning roller (4) is set on the main body (1) of the device and located below the feeding section (202). The cleaning roller (4) has bristles (401) for cleaning the mesh conveyor belt (2) after passing through the scraper (3).

2. The compressed biscuit electric hot air circulating oven tunnel oven according to claim 1, characterized in that, The cleaning roller (4) is rotatably mounted on the main body (1) of the device, and the bristles (401) are evenly distributed around the cleaning roller (4).

3. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 2, characterized in that, The cleaning roller (4) has a cavity (402) inside. One end of the cavity (402) is connected to an external air source through a rotating sealing device. The side wall of the cleaning roller (4) also has several air outlets (403). The air outlets (403) are connected to the cavity (402) and are used to blow the debris brushed off by the bristles (401) away from the mesh conveyor belt (2) and blow it toward the bottom surface of the scraper plate (3).

4. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 1, characterized in that, There is an angle between the scraper (3) and the feeding section (202).

5. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 1, characterized in that, The compressed biscuit electric hot air circulating oven tunnel oven also includes: A number of striking rods (5) are provided. The striking rods (5) are hinged to the cleaning roller (4). The striking rods (5) are arranged such that the cleaning roller (4) strikes the mesh conveyor belt (2) in sequence after rotating. A torsion spring is provided at the hinge of the striking rod (5) to provide the force for the striking rod (5) to return to its original position after striking the mesh conveyor belt (2).

6. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 1, characterized in that, The compressed biscuit electric hot air circulating oven tunnel oven also includes: The receiving box (6) is located on one side of the main body (1) of the device and below the unloading section (202); The partition (7) is disposed inside the receiving box (6). The partition (7) divides the inside of the receiving box (6) into a first cavity (601) and a second cavity (602). The scraper (3) is connected to the top of the partition (7) at one end away from the mesh conveyor belt (2). The partition (7) is arranged such that the biscuit passing over the top surface of the scraper (3) enters the first cavity (601), and the debris blown towards the bottom surface of the scraper (3) enters the second cavity (602).

7. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 3, characterized in that, The compressed biscuit electric hot air circulating oven tunnel oven also includes: A cleaning ring (8) is slidably disposed on the cleaning roller (4) along the axial direction of the cleaning roller (4). The cleaning ring (8) is arranged to clean a number of the bristles (401) in sequence after sliding.

8. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 7, characterized in that, The compressed biscuit electric hot air circulating oven tunnel oven also includes: The chip collection trough (9) is located below the cleaning roller (4) and is used to collect the debris that falls off the cleaning roller (4).

9. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 8, characterized in that, The compressed biscuit electric hot air circulating oven tunnel oven also includes: A cleaning brush (10) is slidably disposed in the chip collection groove (9). The cleaning brush (10) is connected to the cleaning ring (8). The cleaning brush (10) is arranged to slide synchronously with the cleaning ring (8).

10. A compressed biscuit electric hot air circulating oven tunnel oven according to claim 1, characterized in that, The compressed biscuit electric hot air circulating oven tunnel oven also includes: A guard plate (11) is provided on both sides of the scraper plate (3) to prevent the biscuit from falling off the scraper plate (3).

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