Oil smoke filtering device and equipment for duck roaster

Abstract

The invention relates to the technical field of duck roasting equipment, in particular to an oil fume filtering device and equipment for a duck roaster, the oil fume filtering device comprises an oil fume filtering mechanism, and the oil fume filtering mechanism comprises a bottom plate, a water tank and an oil-water separation mechanism; an oil-water collecting tray containing clean water is arranged in the water tank; the oil-water separation mechanism comprises two grease adsorption assemblies, a switching conveying structure and a transverse moving lifting structure, the two grease adsorption assemblies are arranged up and down, the grease adsorption assembly located on the upper portion is used for transferring grease to the switching conveying structure, and the grease adsorption assembly located on the lower portion is used for adsorbing grease; the switching conveying structure is used for switching the positions of the two grease adsorption assemblies and conveying grease, and the transverse moving lifting structure is used for driving the grease adsorption assemblies to move to the position above the oil-water collecting disc and descend to make contact with the grease; the bottom plate, the water tank and the oil-water separation mechanism are arranged, so that the problem that oil layers are too thick due to continuous accumulation of grease, and then oil fume is generated by vaporization under high-temperature radiation of the duck roaster is solved.

Description

Technical Field

[0001] This invention application relates to the technical field of roast duck equipment, specifically to an oil fume filtration device for a roast duck oven, and also to a roast duck oven. Background Technology

[0002] Roast duck, a traditional delicacy, relies on the high-temperature roasting in an oven to achieve crispy skin and tender meat. However, the large amount of oil and accompanying fumes produced during roasting have always been a pain point that the industry urgently needs to address. Currently available roast duck ovens generally come equipped with basic oil collection devices, often employing a simple "water tank" structure. This involves using a guide plate to direct the dripping oil from the roast duck into a collection container filled with water below, utilizing the density difference between oil and water to allow the oil to float and achieve initial separation. However, these traditional devices have significant shortcomings in practical use, with the core problem being the lack of a proper processing mechanism after the oil is collected.

[0003] Specifically, during the roasting process, oil continuously drips and accumulates on the surface of the water. As the roasting time increases, the thickness of the oil layer on the surface of the water gradually increases. On the one hand, an excessively thick oil layer forms a dense insulating layer, severely hindering heat exchange between the water and the air. This causes the water temperature to rise continuously under the combined effects of high-temperature radiation from the roasting oven and heat absorption by the oil itself, resulting in a significant decrease in heat dissipation efficiency. On the other hand, under high-temperature conditions, an excessively thick oil layer is easily heated to its vaporization temperature, causing a large number of oil molecules to volatilize and form fumes. These fumes not only diffuse into the working environment during the roasting process, polluting the air and affecting the health of the workers, but also adhere to the surface of the roasted duck, damaging the crispy texture and color uniformity of the duck skin, thus reducing the quality of the food.

[0004] To address the aforementioned issues, the industry urgently needs a technical solution that can dynamically handle the accumulation of grease on the surface of clean water, preventing excessively thick grease layers from affecting heat dissipation and causing oil fumes. Summary of the Invention

[0005] To address the aforementioned issues, a fume filtration device for roast duck ovens is provided. By incorporating a base plate, a water tank, and an oil-water separation mechanism, it avoids the problem of excessive oil layer accumulation leading to vaporization and fume generation under the high-temperature radiation of the roast duck oven.

[0006] To address the problems of existing technologies, this invention provides an oil fume filtration device for a roast duck oven, comprising an oil fume filtration mechanism, which includes a base plate, a water tank, and an oil-water separation mechanism. The base plate has a collection port in the middle for collecting oil and water from the roast duck. The water tank is located at the lower end of the base plate, and contains an oil-water collection tray filled with clean water. The oil-water separation mechanism is located on one side inside the water tank and includes two oil adsorption components, a switching conveying structure, and a horizontal lifting structure. The two oil adsorption components are arranged vertically and their positions can be switched. The upper oil adsorption component transfers oil to the switching conveying structure, while the lower oil adsorption component adsorbs oil. The switching conveying structure switches the positions of the two oil adsorption components and conveys the oil collected by the oil adsorption components. The horizontal lifting structure drives the oil adsorption components to move above the oil-water collection tray and descend to contact the oil.

[0007] Preferably, the grease adsorption component includes an arc-shaped plate and ceramic fiber bristles; the outer arc surface of the arc-shaped plate faces the oil-water collection tray; the ceramic fiber bristles are multiple and are evenly arranged on the outer arc surface of the arc-shaped plate.

[0008] Preferably, the switching conveying structure includes a hollow rotating shaft and four guide plates; four strip grooves are opened on the hollow rotating shaft; every two guide plates form a group, and a guide port is formed between the two guide plates. The guide port covers two adjacent strip grooves, and the guide port covers an arc plate. The guide plates and strip grooves are smoothly connected.

[0009] Preferably, the switching conveying structure further includes two guide plates and a hot air duct; the two guide plates are symmetrically arranged inside the hollow rotating shaft about its axis, and the guide plates are connected to the inlet formed between the two guide plates; the hot air duct is arranged at one end of the hollow rotating shaft and is used to provide directional hot air to the inside of the hollow rotating shaft.

[0010] Preferably, the lateral lifting structure includes a lifting guide plate, rollers, and a lateral moving structure; the lifting guide plate is disposed at the upper end of the switching conveyor structure; the rollers are connected to the switching conveyor structure and abut against the lifting guide plate; the lateral moving structure is used to push the switching conveyor structure to move along the lifting guide plate.

[0011] Preferably, the lateral movement structure includes a lifting plate, a linear drive assembly, and a lifting linkage assembly; the lifting plate is connected to the switching conveyor structure; the linear drive assembly is used to drive the lifting plate to move horizontally; the lifting linkage assembly is used to slide the lifting plate and the linear drive assembly in the vertical direction and provide an upward force to the lifting plate.

[0012] Preferably, the lateral movement structure further includes a limiting component, which is used to limit the lifting plate to remain horizontal during movement.

[0013] Preferably, the transverse lifting structure further includes an auxiliary structure, which includes a second guide rod, a second slider, and a sliding connection assembly; the axis of the second guide rod extends in the same direction as the movement direction of the switching conveying structure; the second slider is slidably disposed on the second guide rod; and the sliding connection assembly is used to connect the second slider and the switching conveying structure.

[0014] Preferably, the sliding connection assembly includes a connecting block, a guide post, a guide sleeve, and a second spring; the connecting block is connected to the switching conveying structure; the guide post is vertically disposed at the upper end of the connecting block; the guide sleeve is sleeved on the guide post and is connected to the second slider; the second spring is used to apply a force to the guide post that extends into the guide sleeve.

[0015] A roast duck oven includes an oil fume filtration device for the roast duck oven, a roasting chamber disposed at the upper end of the oil fume filtration device, and a roasting air outlet structure that provides hot air from the side of the roasting chamber and is capable of automatic temperature adjustment.

[0016] The advantages of this invention application compared to the prior art are:

[0017] 1. This invention application sets up a bottom plate, a water tank, and an oil-water separation mechanism. The oil dripping from the roast duck flows naturally along the bottom plate to the collection port and falls directly into the oil-water collection tray. With the help of the density difference of the water, the oil floats and the impurities settle, achieving the initial separation. The horizontal lifting structure in the oil-water separation mechanism drives the oil adsorption component and the switching conveying structure to move above the oil-water collection tray and settle smoothly, ensuring that the oil adsorption component is in contact with the oil. The switching conveying structure changes the position of the oil adsorption component, so that the oil absorption and oil discharge processes are carried out simultaneously. Through the flow guidance of the bottom plate, the initial separation of the oil-water collection tray, the oil transfer of the oil adsorption component, and the discharge of the switching conveying structure, a complete and coordinated link is formed, thereby avoiding the problem of oil layer becoming too thick due to continuous accumulation, and then vaporizing and producing oil fumes under the high temperature radiation of the roast duck oven.

[0018] 2. This invention utilizes an arc-shaped plate and ceramic fiber bristles. By switching the conveying structure, the adsorption components rotate synchronously, allowing the ceramic fiber bristles to immerse themselves in the oil layer for efficient oil absorption. During separation, the adsorption force helps to remove the grease. Combined with the guiding effect of the outer arc of the arc plate, the grease flows quickly without residue. At the same time, by alternating the positions of the components, a seamless connection between adsorption and oil discharge is achieved, improving the grease processing efficiency. By setting the arc plate, a smoother flow path is provided for the grease. The natural dispersion of the grease along both sides of the arc surface can effectively reduce flow resistance, thereby preventing grease residue on the surface of the adsorption components.

[0019] 3. This invention application sets up a hollow rotating shaft and four diversion plates. The outer arc surface of the arc plate is connected to the diversion port of the diversion plate. With the inclined guidance of the diversion plate and the receiving function of the strip groove of the hollow rotating shaft, a closed-loop channel for grease transfer is formed, ensuring that the grease enters the interior of the conveying structure from the adsorption component, thereby preventing the grease from falling back into the clean water. Attached Figure Description

[0020] Figure 1 This is a perspective view of a roast duck oven device according to the present invention.

[0021] Figure 2 This is a perspective view of the oil fume filtration mechanism in an oil fume filtration device for a roast duck oven according to this invention application.

[0022] Figure 3 This is a perspective view of the grease adsorption component, switching conveying structure, and horizontal lifting structure in an oil fume filtration device for a roast duck oven according to this invention application.

[0023] Figure 4 This is a perspective view of the arc-shaped plate, ceramic fiber brush, hollow rotating shaft, and flow guide plate in an oil fume filtration device for a roast duck oven according to this invention application.

[0024] Figure 5 This is a perspective view of the hollow rotating shaft and the guide plate in the oil fume filtration device for a roast duck oven according to the present invention application.

[0025] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle.

[0026] Figure 7 This is a perspective view of the hollow rotating shaft, hot air pipe, and sliding connection assembly in an oil fume filtration device for a roast duck oven according to this invention application.

[0027] Figure 8 This is a perspective view of the hollow rotating shaft, lifting guide plate, roller, lifting plate, linear drive assembly, lifting linkage assembly and limit assembly in the oil fume filtration device for roast duck oven of this invention application.

[0028] Figure 9 This is a perspective view of the lifting plate, linear drive assembly, and lifting linkage assembly in an oil fume filtration device for a roast duck oven according to this invention application.

[0029] Figure 10 This is a perspective view of the lifting plate, lead screw, moving block, connecting rod, first guide rod, and first slider in an oil fume filtration device for a roast duck oven according to the present invention.

[0030] Figure 11 This is a perspective view of the hollow rotating shaft, second guide rod, second slider, and sliding connection assembly in an oil fume filtration device for a roast duck oven according to the present invention.

[0031] Figure 12 This is a three-dimensional sectional view of the hollow rotating shaft, the second slider, and the sliding connection assembly in the oil fume filtration device for a roast duck oven according to the present invention application.

[0032] The following components are labeled in the diagram: 1. Base plate; 2. Water tank; 21. Oil-water collection tray; 3. Grease adsorption assembly; 31. Arc plate; 32. Ceramic fiber brush; 4. Switching conveyor structure; 41. Hollow rotating shaft; 411. Strip trough; 42. Diverting plate; 43. Guide plate; 44. Hot air duct; 5. Horizontal lifting structure; 51. Lifting guide plate; 52. Roller; 53. Horizontal structure; 531. Lifting plate; 532. Linear drive assembly; 5321. Lead screw 5322, Moving block; 533, Lifting linkage assembly; 5331, Connecting rod; 5332, First spring; 534, Limiting assembly; 5341, First guide rod; 5342, First slider; 54, Auxiliary structure; 541, Second guide rod; 542, Second slider; 543, Sliding connection assembly; 5431, Connecting block; 5432, Guide post; 5433, Guide sleeve; 5434, Second spring; 6, Baking oven; 7, Baking air outlet structure. Detailed Implementation

[0033] To further understand the features, technical means, and specific objectives and functions achieved by this invention application, the invention application will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0034] Reference Figures 1 to 12 As shown: A fume filtration device for a roast duck oven includes a fume filtration mechanism, which includes a base plate 1, a water tank 2, and an oil-water separation mechanism. The base plate 1 has a collection port for collecting oil and water from roast duck in the middle. The water tank 2 is located at the lower end of the base plate 1, and an oil-water collection tray 21 filled with clean water is provided inside the water tank 2. The oil-water separation mechanism is located on one side inside the water tank 2. The oil-water separation mechanism includes two grease adsorption components 3, a switching conveying structure 4, and a horizontal lifting structure 5. The two grease adsorption components 3 are arranged vertically and their positions can be switched. The upper grease adsorption component 3 is used to transfer grease to the switching conveying structure 4, and the lower grease adsorption component 3 is used to adsorb grease. The switching conveying structure 4 is used to switch the positions of the two grease adsorption components 3 and convey the grease collected by the grease adsorption components 3. The horizontal lifting structure 5 is used to drive the grease adsorption component 3 to move above the oil-water collection tray 21 and descend to contact the grease.

[0035] Once the roasting oven starts operating, the oil produced during the roasting process continuously drips downwards, eventually landing on the base plate 1 of the device. Under gravity, the dripping oil automatically flows towards the center of the base plate 1, ultimately falling through a collection port in the center of the base plate 1 into the oil-water collection tray 21 within the water tank 2 below. Because the oil's density is less than that of water, it naturally floats on the surface of the water, while any small amount of impurities that may accompany the roasting process settle to the bottom, achieving initial separation of oil and impurities. At this point, the oil on the surface of the water gradually accumulates as the roasting time increases, until it covers most of the water's surface. Then, the horizontal lifting structure 5 drives the two connected oil adsorption components 3 and the switching conveying structure 4 to move horizontally until they are directly above the oil-water collection tray 21. Subsequently, the horizontal lifting structure 5 drives the entire structure to descend until the lower oil adsorption component 3 contacts the oil on the surface of the water. At this point, the horizontal lifting structure 5 stops moving, and the oil adsorption... Component 3 remains in contact with the grease and begins to absorb it. Once the lower grease-absorbing component 3 has finished absorbing the grease, the switching conveyor structure 4 swaps the positions of the two grease-absorbing components 3. The grease-absorbing component 3 that was originally in the lower position rises to the upper position, while the grease-absorbing component 3 that was originally in the upper position descends to the lower position, contacting the grease on the surface of the water and starting a new round of absorption. At the same time, the grease absorbed on the surface of the upper grease-absorbing component 3 automatically flows to the switching conveyor structure 4 under the action of gravity, realizing the transfer of grease from the grease-absorbing component 3 to the conveyor structure. The switching conveyor structure 4 transfers the collected grease out of the water tank 2. Once the lower grease-absorbing component 3 has finished a new round of absorption, the switching conveyor structure 4 starts the position switching action again. This cycle repeats continuously, transferring and discharging the grease from the surface of the water. By collecting and separating the grease from the surface of the water, the problem of grease accumulating and forming an excessively thick oil layer, which would then vaporize and produce fumes under the high-temperature radiation of the roast duck oven, is avoided.

[0036] Reference Figure 4 As shown: The grease adsorption component 3 includes an arc-shaped plate 31 and ceramic fiber bristles 32; the outer arc surface of the arc plate 31 faces the oil and water collection tray 21; there are multiple ceramic fiber bristles 32, and the multiple ceramic fiber bristles 32 are evenly arranged on the outer arc surface of the arc plate 31.

[0037] The switching conveyor structure 4 drives the two grease adsorption components 3 to rotate synchronously. The ceramic fiber bristles 32 of the lower grease adsorption component 3 are slowly immersed below the surface of the clean water. Due to the excellent oleophilicity and adsorption capacity of the ceramic fiber bristles 32, the grease on the surface of the clean water will quickly adhere to the surface of the bristles. At the same time, the dense arrangement of the bristles can cover a large area of ​​oil layer, ensuring the amount of oil adsorbed at one time. When the ceramic fiber bristles 32 adsorbs enough grease, the switching conveyor structure 4 is activated, and the lower adsorption component is gradually lifted upward with the rotation. The ceramic fiber bristles 32 then separate from the surface of the clean water. During the separation process, the grease attached to the surface of the bristles is carried out synchronously due to the adhesion force, while the small amount of clean water remaining between the bristles drips back to the oil-water collection tray 21 under the action of gravity, realizing the initial separation of oil and water. As the rotation continues, the original The lower adsorption component gradually rotates to the position above the switching conveying structure 4. At this time, the outer arc surface of the arc plate 31 of the adsorption component is convex. Under the action of gravity, the grease on the ceramic fiber bristles 32 begins to flow downward along the ceramic fiber bristles 32 and drips onto the outer arc surface of the arc plate 31. Since the arc plate 31 adopts an outer arc design, the grease will naturally disperse and flow to both sides along the inclined direction of the outer arc surface after contacting the arc surface, avoiding the accumulation of grease in the center of the arc surface. At the same time, the empty grease adsorption component 3, which was originally in the upper position, has rotated to the lower position and started a new round of grease adsorption work, realizing a seamless connection between adsorption and oil discharge. By setting the arc plate 31 to provide a smoother flow path for the grease, the natural dispersion of the grease along both sides of the arc surface can effectively reduce the flow resistance, thereby avoiding grease residue on the surface of the adsorption component.

[0038] Reference Figure 5 and Figure 6 As shown: The switching conveying structure 4 includes a hollow rotating shaft 41 and four guide plates 42; four strip grooves 411 are provided on the hollow rotating shaft 41; every two guide plates 42 form a group, and a guide port is formed between the two guide plates 42. The guide port covers two adjacent strip grooves 411, and the guide port covers the arc plate 31. The guide plate 42 is smoothly connected to the strip groove 411.

[0039] When the grease flows to both sides along the outer arc of the arc plate 31 to the edge, it will flow into the drainage port formed by the corresponding set of drainage plates 42. With the help of the tilt angle of the drainage plate 42, the grease slides smoothly along the surface of the drainage plate 42 and finally passes through the strip groove 411 on the hollow rotating shaft 41 and enters the interior of the hollow rotating shaft 41, completing the efficient transfer of grease from the adsorption component to the conveying structure, thereby preventing the grease from falling back into the clean water.

[0040] Reference Figure 6 and Figure 7As shown: The switching conveying structure 4 also includes two guide plates 43 and a hot air pipe 44; the two guide plates 43 are symmetrically arranged inside the hollow rotating shaft 41 about the axis of the hollow rotating shaft 41, and the guide plates 43 are connected to the flow inlets formed between the two flow guide plates 42; the hot air pipe 44 is arranged at one end of the hollow rotating shaft 41 and is used to provide directional hot air to the inside of the hollow rotating shaft 41.

[0041] The four strip grooves 411 on the hollow rotating shaft 41 are divided into upper and lower groups according to their positions. The two upper strip grooves 411 correspond to the upper grease adsorption component 3, and the two lower ones correspond to the lower grease adsorption component 3. When grease passes through the strip grooves 411 along the two guide plates 42 and enters the hollow rotating shaft 41, the grease may fall into the lower strip grooves 411, causing the grease to flow downward from the lower strip grooves 411. Therefore, two guide plates 43 and hot air pipes 44 are provided. When the grease flows to both sides along the outer arc surface of the arc plate 31 to the edge, it will flow into the guide port of the corresponding group of guide plates 42, slide along the guide plate 42, pass through the corresponding strip grooves 411, and enter the interior of the hollow rotating shaft 41. At this time, the guide plates 43 immediately form a limit to the inflowing grease. The system prevents grease from flowing downwards into the lower strip groove 411 due to gravity, thus preventing it from falling back into the clean water. Simultaneously, the hot air pipe 44 continuously blows directional hot air into the hollow rotating shaft 41. The direction of the hot air is consistent with the flow direction of the grease on the guide plate 43. On the one hand, it provides auxiliary power to accelerate the movement of the grease towards the oil outlet at the other end of the hollow rotating shaft 41. On the other hand, the temperature of the hot air maintains the fluid state of the grease, effectively preventing the grease from solidifying on the guide plate 43 or the inner wall of the hollow rotating shaft 41 due to temperature drop. Through the cooperation of the guide plate 43 and the hot air pipe 44, the grease entering the hollow rotating shaft 41 can be completely and efficiently discharged, avoiding the recovery loss caused by grease falling back into the clean water, thereby improving the grease recovery efficiency.

[0042] Reference Figure 2 and Figure 3 As shown: The transverse lifting structure 5 includes a lifting guide plate 51, a roller 52 and a transverse structure 53; the lifting guide plate 51 is disposed at the upper end of the switching conveying structure 4; the roller 52 is connected to the switching conveying structure 4 and abuts against the lifting guide plate 51; the transverse structure 53 is used to push the switching conveying structure 4 to move along the lifting guide plate 51.

[0043] Before placing the oil-water collection tray 21 into the water tank 2, the grease adsorption component 3 and the switching conveying structure 4 are located in one side of the water tank 2. This area does not interfere with the placement of the oil-water collection tray 21, providing ample space for workers to place the oil-water collection tray 21 and inject clean water. After the oil-water and grease tray is placed in place, the output end of the transverse moving structure 53 generates a horizontal driving force, pushing the switching conveying structure 4 connected to it to move as a whole. The grease adsorption component 3, being fixedly connected to the switching conveying structure 4, moves synchronously. During this process, the switching conveying structure 4 drives the roller 52 to roll along the guide surface of the lifting guide plate 51. The lifting guide plate 51 has a horizontal section and an inclined downward section. Since the initial movement stage corresponds to the horizontal section of the lifting guide plate 51, the roller 52 maintains a horizontal rolling direction within the horizontal section, thereby driving the grease adsorption component 3 and the switching conveying structure 4 to move smoothly in the horizontal direction, moving horizontally towards the area directly above the oil-water collection tray 21. When the roller 52 moves with the whole to the lifting guide plate 51, the roller 52 moves horizontally towards the area directly above the oil-water collection tray 21. At the junction of the horizontal section and the inclined downward section of the guide plate 51, the transverse structure 53 continuously provides driving force. The roller 52 enters the inclined downward section of the lifting guide plate 51. Since the inclined downward section is inclined downward at a certain angle, when the roller 52 rolls along this section, its axis position naturally decreases with the inclined surface. Then, through the bracket, it drives the switching conveying structure 4 and the grease adsorption component 3 to sink downward synchronously. During this process, the transverse structure 53 does not need to change the driving direction and output force nature. It only relies on the structural guidance of the inclined surface of the lifting guide plate 51 to achieve a natural conversion from horizontal movement to vertical lifting. As the overall structure continues to sink, the grease adsorption component 3 gradually approaches the surface of the clean water in the oil and water collection tray 21 until the ceramic fiber bristles 32 on the lower grease adsorption component 3 are completely inserted below the clean water and the bristles form effective contact with the grease on the surface of the clean water, meeting the adsorption conditions. The transverse structure 53 stops operating. Through the cooperation of the transverse structure 53 and the lifting guide plate 51, the continuous execution of horizontal movement and lifting movement is achieved.

[0044] Reference Figure 3 , Figure 8 and Figure 9 As shown: The transverse structure 53 includes a lifting plate 531, a linear drive assembly 532, and a lifting linkage assembly 533; the lifting plate 531 is connected to the switching conveyor structure 4; the linear drive assembly 532 is used to drive the lifting plate 531 to move horizontally; the lifting linkage assembly 533 is used to slide the lifting plate 531 and the linear drive assembly 532 in the vertical direction and provide an upward force to the lifting plate 531.

[0045] Specifically, the linear drive assembly 532 includes a lead screw 5321 and a moving block 5322. The axis of the lead screw 5321 is perpendicular to the axis of the hollow rotating shaft 41. The moving block 5322 is threadedly connected to the lead screw 5321. The lifting linkage assembly 533 includes multiple connecting rods 5331, which are parallel to each other. One end of the connecting rod 5331 passes upward through the lifting plate 531 and is connected to the moving block 5322. The lifting plate 531 is slidably connected to the connecting rod 5331. A first spring 5332 is sleeved on the connecting rod 5331. The two ends of the first spring 5332 abut against the end of the connecting rod 5331 and the bottom of the lifting plate 531, respectively.

[0046] The lead screw 5321 rotates around its own axis, and the rotational motion of the lead screw 5321 is converted into the horizontal linear motion of the moving block 5322 along the axis of the lead screw 5321. The moving block 5322 then drives the multiple connecting rods 5331 fixed to it to move horizontally in sync. The connecting rods 5331, through a sliding engagement with the lifting plate 531, push the lifting plate 531 to move horizontally. The lifting plate 531 is fixedly connected to the switching conveying structure 4, thereby driving the grease adsorption assembly 3 and the switching conveying structure 4 to move synchronously as a whole. During this process, the switching conveying structure 4 drives the roller 52 to roll along the guide surface of the lifting guide plate 51. In the initial movement stage, corresponding to the horizontal section of the lifting guide plate 51, the roller 52 rolls horizontally. The lifting plate 531, supported by the first spring 5332, maintains a fixed horizontal height and only moves horizontally with the connecting rods 5331, ensuring that the grease adsorption assembly 3 is accurately aligned with the oil-water collection tray 21. As the roller 52 moves with the whole structure to the junction of the horizontal section and the inclined downward section of the lifting guide plate 51, the lead screw 5321 continues to rotate, driving the moving block 5322 and the connecting rod 5331 to move forward. Under the action of the driving force, the roller 52 enters the inclined downward section. At this time, the lifting plate 531 needs to overcome the upward supporting force of the first spring 5332 and gradually slide downward along the connecting rod 5331. Multiple parallel connecting rods 5331 form a limit on the lifting plate 531, ensuring that it can only slide along the axis of the connecting rod 5331 and will not tilt or deviate. As the overall structure settles, the grease adsorption component 3 gradually approaches the surface of the clean water until the ceramic fiber bristles 32 of the lower grease adsorption component 3 are completely inserted below the clean water and effectively contact the grease, satisfying the adsorption conditions. Through the cooperation of the lifting plate 531 and the lifting linkage component 533, the switching conveying structure 4 can move smoothly in the horizontal and vertical directions.

[0047] Reference Figure 8 and Figure 10 As shown: The transverse structure 53 also includes a limiting component 534, which is used to limit the lifting plate 531 to remain horizontal during movement.

[0048] Specifically, the limiting component 534 includes a first guide rod 5341 and a first slider 5342. The first guide rod 5341 is arranged parallel to the lead screw 5321, and the first slider 5342 is slidably arranged on the first guide rod 5341. The first slider 5342 is connected to the lower end of the connecting rod 5331.

[0049] Since the moving block 5322 is threadedly connected to the lead screw 5321, the rotational motion of the lead screw 5321 is converted into the horizontal linear motion of the moving block 5322 along the axis of the lead screw 5321. However, during this process, due to the characteristics of the threaded transmission, the moving block 5322 tends to rotate with the lead screw 5321. If this is not restricted, it will cause the connecting rod 5331 to swing around the axis of the lead screw 5321, which will lead to the tilting of the lifting plate 531. Therefore, a limiting structure is set. When the moving block 5322 drives the multiple connecting rods 5331 fixed to it to move horizontally synchronously, the connecting rods 5331 will tilt downwards. The first slider 5342 connected to the end slides along the first guide rod 5341. Due to the limiting effect of the first guide rod 5341 on the first slider 5342, the first slider 5342 can only translate along the axis of the first guide rod 5341 and cannot rotate or deflect. Through the rigid connection of the connecting rod 5331, the first slider 5342 transmits this limiting effect to the moving block 5322, forcing the moving block 5322 to follow the movement trajectory of the first slider 5342 and only move horizontally along the axis of the lead screw 5321, thereby avoiding the occurrence of the rotation tendency of the moving block 5322.

[0050] Reference Figure 3 and Figure 11 As shown: The horizontal lifting structure 5 also includes an auxiliary structure 54, which includes a second guide rod 541, a second slider 542 and a sliding connection assembly 543; the axis of the second guide rod 541 extends in the same direction as the movement direction of the switching conveying structure 4; the second slider 542 is slidably disposed on the second guide rod 541; the sliding connection assembly 543 is used to connect the second slider 542 and the switching conveying structure 4.

[0051] The length of the hollow rotating shaft 41 is greater than the width of the grease collection tray to ensure that the grease adsorption component 3 on it can cover the maximum area of ​​grease on the surface of the clean water. However, this long length makes it prone to sagging at the other end when only one end is connected to the lifting plate 531. By setting an auxiliary structure 54, the sliding connection component 543 in the auxiliary structure 54 securely connects the second slider 542 to the end of the hollow rotating shaft 41 away from the lifting plate 531. At this time, the sliding connection component 543 uses its own structural strength to form an upward supporting force on the hollow rotating shaft 41, which counteracts the sagging torque caused by its own weight, thereby keeping the hollow rotating shaft 41 horizontal as a whole.

[0052] Reference Figure 11 and Figure 12As shown: The sliding connection assembly 543 includes a connecting block 5431, a guide post 5432, a guide sleeve 5433, and a second spring 5434; the connecting block 5431 is connected to the switching conveying structure 4; the guide post 5432 is vertically arranged at the upper end of the connecting block 5431; the guide sleeve 5433 is sleeved on the guide post 5432, and the guide sleeve 5433 is connected to the second slider 542; the second spring 5434 is used to apply a force to the guide post 5432 that extends into the guide sleeve 5433.

[0053] When the hollow shaft 41 is located on one side inside the water tank 2, the force exerted by the second spring 5434 on the guide post 5432 causes the guide post 5432 to extend into the guide sleeve 5433. When the hollow shaft 41 descends, the guide post 5432 gradually extends out of the guide sleeve 5433, and the second spring 5434 is compressed. At this time, the upward force exerted by the second spring 5434 on the guide post 5432 increases. This force acts on the hollow shaft 41 through the guide post 5432 and the connecting block 5431, which increases the upward support force on the end of the hollow shaft 41 away from the lifting plate 531, causing the hollow shaft 41 to tend to tilt towards the lifting plate 531, thereby realizing the flow of grease in the hollow shaft 41 towards the end of the hollow shaft 41 connected to the lifting plate 531.

[0054] Reference Figure 1 As shown: A roast duck oven equipment includes an oil fume filtration device for roast duck oven, a roasting box 6 disposed at the upper end of the oil fume filtration device, and a roasting air outlet structure 7 that provides hot air from the side of the roasting box 6 and is capable of automatic temperature adjustment.

[0055] After the roast duck is hung in the roasting oven 6, the roasting air outlet structure 7 blows out even hot air from the side, so that the duck is heated evenly from top to bottom, thus solving the problem of large temperature difference between the top and bottom and local scorching in traditional roast duck ovens, and making the duck skin heat up evenly.

[0056] The above embodiments only illustrate one or more implementation methods of this invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these all fall within the protection scope of this invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A cooking fume filtering device for a roast duck stove, comprising a cooking fume filtering mechanism, characterized in that, The oil fume filtering mechanism comprises a bottom plate (1), a water tank (2) and an oil-water separation mechanism; A collecting opening for collecting roasted duck oil and water is formed in the middle of the bottom plate (1); The water tank (2) is arranged at the lower end of the bottom plate (1), and an oil-water collecting disc (21) containing clean water is arranged in the water tank (2); The oil-water separation mechanism is arranged on one side in the water tank (2), and comprises two oil adsorption assemblies (3), a switching conveying structure (4) and a horizontal moving and lifting structure (5). The two oil adsorption assemblies (3) are arranged in an up-down manner and can be switched with each other. The oil adsorption assembly (3) at the upper position is used for transferring oil to the switching conveying structure (4), and the oil adsorption assembly (3) at the lower position is used for adsorbing oil. The switching conveying structure (4) is used for switching the positions of the two oil adsorption assemblies (3) and conveying the oil collected by the oil adsorption assembly (3). The horizontal moving and lifting structure (5) is used for driving the oil adsorption assembly (3) to move to the upper side of the oil-water collecting disc (21) and to be lowered to contact with the oil.

2. The oil fume filtering device for a duck roaster according to claim 1, characterized in that, The oil adsorption assembly (3) comprises an arc-shaped plate (31) and ceramic fiber bristles (32). The outer arc surface of the arc-shaped plate (31) faces the oil-water collecting disc (21). The ceramic fiber bristles (32) are provided on the outer arc surface of the arc-shaped plate (31) in a uniform manner.

3. The oil fume filtering device for a duck roaster according to claim 1, characterized in that, The switching conveying structure (4) comprises a hollow rotating shaft (41) and four flow guide plates (42). Four strip-shaped grooves (411) are formed in the hollow rotating shaft (41). Each two flow guide plates (42) form a group, and a flow guide opening is formed between the two flow guide plates (42). The flow guide opening covers the two adjacent strip-shaped grooves (411), and the flow guide opening covers the arc-shaped plate (31). The flow guide plate (42) is smoothly and transitionally connected with the strip-shaped groove (411).

4. The oil fume filtering device for a duck roaster according to claim 3, characterized in that, The switching conveying structure (4) further comprises two flow guide plates (43) and a hot air pipe (44). The two flow guide plates (43) are symmetrically arranged in the hollow rotating shaft (41) about the axis of the hollow rotating shaft (41), and the flow guide plate (43) is butted with the flow guide opening formed between the two flow guide plates (42). The hot air pipe (44) is arranged at one end of the hollow rotating shaft (41) and is used for providing directional hot air in the hollow rotating shaft (41).

5. The oil fume filtering device for a duck roaster according to claim 1, wherein The horizontal moving and lifting structure (5) comprises a lifting guide plate (51), a roller (52) and a horizontal moving structure (53). The lifting guide plate (51) is arranged at the upper end of the switching conveying structure (4). The roller (52) is connected with the switching conveying structure (4), and the roller (52) abuts against the lifting guide plate (51). The horizontal moving structure (53) is used for driving the switching conveying structure (4) to move along the lifting guide plate (51).

6. The oil fume filtering device for a duck roaster according to claim 5, wherein The horizontal moving structure (53) comprises a lifting plate (531), a linear driving assembly (532) and a lifting linkage assembly (533). The lifting plate (531) is connected with the switching conveying structure (4). The linear driving assembly (532) is used for driving the lifting plate (531) to move horizontally. The lifting linkage assembly (533) is used for slidingly connecting the lifting plate (531) and the linear driving assembly (532) in the vertical direction and providing an upward force to the lifting plate (531).

7. The oil fume filtering device for a duck roaster according to claim 6, wherein The horizontal moving structure (53) further comprises a limiting assembly (534) for limiting the horizontal keeping of the lifting plate (531) during movement.

8. The oil fume filtering device for a duck roaster according to claim 5, wherein, The horizontal moving and lifting structure (5) further comprises an auxiliary structure (54) comprising a second guide rod (541), a second sliding block (542) and a sliding connection assembly (543). The axis of the second guide rod (541) extends in the same direction as the moving direction of the switching conveying structure (4). The second sliding block (542) is slidingly arranged on the second guide rod (541). The sliding connection assembly (543) is used for connecting the second sliding block (542) and the switching conveying structure (4).

9. The oil fume filtering device for a duck roaster according to claim 8, wherein, The sliding connection assembly (543) comprises a connecting block (5431), a guide column (5432), a guide sleeve (5433) and a second spring (5434). The connecting block (5431) is connected with the switching conveying structure (4). The guide column (5432) is vertically arranged at the upper end of the connecting block (5431). The guide sleeve (5433) is sleeved on the guide column (5432), and the guide sleeve (5433) is connected with the second sliding block (542). The second spring (5434) is used for exerting an action force into the guide sleeve (5433) on the guide column (5432).

10. A duck roasting apparatus comprising a fume filtering device for a duck roasting apparatus as claimed in any one of claims 1 to 9, characterized in that, The cooking oven (6) is arranged at the upper end of the oil fume filtering mechanism, and the baking air outlet structure (7) is capable of automatically adjusting the temperature and provides hot air from the side of the cooking oven (6).

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