Oil fume filtering device, control method thereof, and oil fume purifier

Abstract

The present invention relates to the technical field of kitchen appliances, and in particular to an oil fume filtering device, a control method thereof, and an oil fume purifier. The oil fume filtering device provided by the present invention includes a shell and a purification component, and the purification component includes a first rotating shaft and blades; when the oil fume purifier is in operation, smoke enters the air duct from the air inlet, and the blowing blades rotate along with the first rotating shaft, and at the same time, the grease particles in the smoke contact the blades and are thrown onto the air duct wall under the action of centrifugal force. Compared with the existing oil net filtering method for smoke, the oil fume filtering device provided by the present application can not only filter out the grease particles in the smoke, but also throw the grease particles onto the air duct wall by the centrifugal force of the high-speed rotation of the blades, and will not block the air duct, thereby solving the problem of excessive system wind resistance caused by filter blockage, which affects the smoke purification efficiency. At the same time, there is no need to frequently clean the oil net, reducing the cost of manual cleaning of the oil net.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to an oil fume filtering device and a control method thereof, and an oil fume purifier. Background Art

[0002] National standards for the catering industry have been revised, and new, more stringent local standards for cooking fume emissions have been introduced across the country. Furthermore, with people's growing environmental needs, complaints about cooking fumes have surged, and local law enforcement agencies are increasingly stringent in enforcing regulations regarding cooking fume emissions. This mandates that all catering establishments install fume purifiers and ensure their continued efficient operation.

[0003] Currently, catering establishments typically use electrostatic fume purifiers to purify cooking fumes to meet cooking fume exhaust standards. These purifiers typically use mesh, perforated plate, or honeycomb mechanical filters at the air inlet for primary filtration of large fume and particulate matter. However, these filters suffer from the following drawbacks: large gaps result in poor filtration, while small gaps lead to increased clogging and resistance. Furthermore, if these filters are left unwashed for extended periods, stubborn oil stains can become difficult to completely remove, resulting in reduced purification efficiency.

[0004] The honeycomb mechanical filters currently used in electrostatic fume purifiers are densely populated and easily clogged, accounting for approximately 80% of the electrostatic purifier's resistance. These filters often become clogged with large particles, making them difficult to clean. This significantly reduces the filter's purification efficiency and increases resistance. This impacts the electrostatic purifier's efficiency, increases the load on the fan, and increases the frequency of manual cleaning and maintenance. Summary of the Invention

[0005] (1) The technical problem to be solved by the present invention is that the existing oil fume purifier has a filter at the air inlet, which has the problem of filter clogging and needs to be cleaned frequently; and the system resistance is large, which affects the purification efficiency of the electrostatic purifier and increases the load of the fan.

[0006] (2) Technical solution

[0007] In order to solve the above technical problems, an embodiment of the present invention provides an oil fume filtering device, comprising: a shell and a purification component; a accommodating cavity with openings at both ends is formed in the shell, at least one air duct is formed in the accommodating cavity, the air duct has relative air inlets and air outlets, and each air duct is provided with a group of the purification components; the purification component includes blades and a first rotating shaft capable of rotating along an axis, the first rotating shaft is provided in the air duct, and at least one blade is connected to the first rotating shaft.

[0008] According to one embodiment of the present invention, at least one partition is provided in the shell, and the at least one partition divides the accommodating cavity into a plurality of mutually independent air ducts.

[0009] According to one embodiment of the present invention, a plurality of partitions are provided in the shell, and the plurality of partitions are parallel to each other and spaced apart to divide the accommodating cavity into the plurality of air ducts.

[0010] According to one embodiment of the present invention, the housing is a frame-type structure; the two open ends of the housing are respectively an air inlet end and an air outlet end, the air inlet faces one side of the air inlet end, and the air outlet faces one side of the air outlet end;

[0011] The upper end of the partition is connected to the inner wall of the top plate of the shell, and the lower end of the partition is connected to the inner wall of the bottom plate of the shell.

[0012] According to one embodiment of the present invention, the blade is a long strip structure, and the length direction of the blade extends along the length direction of the partition.

[0013] According to one embodiment of the present invention, the cross section of the blade is arc-shaped.

[0014] According to one embodiment of the present invention, an oleophobic layer is provided on the surface of the blade.

[0015] According to one embodiment of the present invention, the oil fume filtering device further includes a cleaning assembly. A group of the cleaning assemblies is provided in each of the air ducts, and the cleaning assemblies are used to clean the blades.

[0016] According to one embodiment of the present invention, the cleaning component includes a brush, and the brush is arranged in the air duct;

[0017] During the rotation of the first rotating shaft, the brush can come into contact with the blades.

[0018] According to one embodiment of the present invention, the cleaning assembly further comprises a second rotating shaft capable of rotating about an axis;

[0019] The second rotating shaft is parallel to the first rotating shaft, the brush is connected to the second rotating shaft; and the first rotating shaft is arranged between the second rotating shaft and the air inlet.

[0020] According to one embodiment of the present invention, a plurality of rows of brushes are provided on the second rotating shaft, and the plurality of rows of brushes are spaced apart in the circumferential direction of the second rotating shaft.

[0021] According to one embodiment of the present invention, the oil fume filtering device further includes a reversing component, and the reversing component is used to switch the rotation direction of the first rotating shaft.

[0022] According to one embodiment of the present invention, the reversing assembly includes a baffle and a driving mechanism, and the baffle is arranged in a one-to-one correspondence with the air duct;

[0023] Each of the baffles can partially block the air inlet, and the driving mechanism can drive the baffles to translate to change the area of ​​the air inlet blocked by the baffles.

[0024] According to one embodiment of the present invention, the driving mechanism includes a push rod and a propeller, wherein the propeller is connected to the push rod to drive the push rod to move linearly; the plurality of baffles are respectively connected to the push rod and are located on the same side of the push rod.

[0025] According to one embodiment of the present invention, the oil fume filtering device also includes a controller and a detection mechanism, the controller is electrically connected to the detection mechanism and the reversing assembly respectively, the detection mechanism is used to detect the grease information deposited on the blades, and the detection mechanism controls the reversing assembly to run or stop according to the grease information deposited on the blades detected by the detection mechanism.

[0026] According to one embodiment of the present invention, the detection mechanism includes a pressure sensor, which is used to detect the pressure difference between the air inlet and air outlet of the oil fume filtering device and transmit it to the controller. The controller compares the detected pressure difference with a preset pressure difference threshold and generates a control instruction to control the reversing component to run or stop.

[0027] Another embodiment of the present invention provides a method for controlling an oil fume filter device, using the oil fume filter device described in any of the above embodiments, comprising:

[0028] Detect the pressure difference T1 between the air inlet and outlet of the oil fume filter device;

[0029] The detected pressure difference is compared with a preset pressure difference threshold value T2. When T1>T2, the reversing component is controlled to start.

[0030] Another embodiment of the present invention further provides an oil fume purifier, comprising the oil fume filtering device as described in any of the above embodiments, wherein the oil fume filtering device is arranged at the air inlet of the oil fume purifier.

[0031] Beneficial effects of the present invention: The oil fume filtering device provided by the present invention includes a shell and a purification component, and the purification component includes a first rotating shaft and blades, and at least one blade is connected to the first rotating shaft; when the oil fume purifier is in operation, the smoke enters the air duct from the air inlet, and the smoke blows the blades to rotate along with the first rotating shaft, and at the same time, the grease particles in the smoke contact the blades and are thrown onto the wall of the air duct under the action of centrifugal force. Compared with the existing oil net filtering method, the filtering device provided by the present application can not only filter out the grease particles in the smoke, so that the smoke discharged through the air outlet meets the emission standards, but also the grease particles are thrown onto the wall of the air duct by the centrifugal force of the high-speed rotation of the blades, and will not block the air duct, thereby solving the problem of excessive wind resistance of the system due to filter screen blockage, which affects the efficiency of smoke purification. At the same time, there is no need to frequently clean the oil net, reducing the cost of manual cleaning of the oil net. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0033] Figure 1 A perspective view of an oil fume filtering device provided in one embodiment of the present invention;

[0034] Figure 2 A three-dimensional diagram of an oil fume filtering device provided by one embodiment of the present invention from another perspective;

[0035] Figure 3 An exploded view of an oil fume filtering device provided by one embodiment of the present invention;

[0036] Figure 4 A bottom view of the oil fume filtering device provided by one embodiment of the present invention in normal working state;

[0037] Figure 5 A bottom view of a fume filter in a self-cleaning state provided by one embodiment of the present invention;

[0038] Figure 6 It is a structural diagram of the purification component;

[0039] Figure 7 for Figure 6 A magnified view of part A;

[0040] Figure 8 It is a schematic diagram of the structure of the cleaning component;

[0041] Figure 9 for Figure 8A magnified view of part B;

[0042] Figure 10 It is a structural diagram of the reversing component;

[0043] Figure 11 Schematic diagram of the shell structure.

[0044] Icons: 1-shell; 11-top plate; 12-bottom plate; 13-side plate; 14-accommodation cavity; 15-air duct; 151-air inlet; 16-partition plate;

[0045] 2-purification component; 21-first rotating shaft; 22-blade;

[0046] 3-cleaning component; 31-second rotating shaft; 32-brush;

[0047] 4-reversing assembly; 41-push rod; 42-thruster; 43-baffle. DETAILED DESCRIPTION

[0048] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0049] like Figures 1 to 11 As shown, an embodiment of the present invention provides an oil fume filtering device, comprising: a shell 1 and a purification component 2; a accommodating cavity 14 with openings at both ends is formed in the shell 1, at least one air duct 15 is formed in the accommodating cavity 14, the air duct 15 has relative air inlet 151 and air outlet, and each of the air ducts 15 is provided with a group of the purification components 2; the purification component 2 includes blades 22 and a first rotating shaft 21 capable of rotating along an axis, the first rotating shaft 21 is provided in the air duct 15, and at least one blade 22 is connected to the first rotating shaft 21.

[0050] The oil fume filtering device provided in this embodiment is used for an oil fume purifier, and may be an electrostatic oil fume purifier, an activated carbon purifier, a UV purifier, etc. Preferably, the oil fume filtering device provided in this embodiment is used for an electrostatic oil fume purifier; the oil fume filtering device is arranged at the air inlet of the oil fume purifier, and the oil fume filtering device is used to filter the grease particles or smoke particles in the oil fume so that the oil fume meets the emission standards. Among them, the oil fume purifier includes a fan, which provides power through the fan to realize the flow and discharge of oil fume. When the equipment is running, the fan starts, and the smoke enters from the air inlet 151 of the air duct 15, and is discharged from the air outlet after passing through the air duct 15. Since the fan has a certain kinetic energy when driving the smoke into the air duct 15, the smoke blown onto the blades 22 drives the blades 22 to rotate around the first rotating shaft 21. The high-speed rotation of the blades 22 generates centrifugal force, and the grease particles or smoke particles that contact the blades 22 are thrown onto the wall of the air duct 15 under the action of centrifugal force. The situation of grease blocking the air duct 15 will not occur, which solves the problem of excessive wind resistance of the air duct 15 system caused by filter blockage, can improve the smoke purification efficiency, and at the same time does not require frequent cleaning of the oil net, reducing the cost of manual cleaning of the oil net.

[0051] According to one embodiment of the present invention, Figures 1 to 11 As shown, at least one partition 16 is provided in the housing 1, and at least one partition 16 divides the accommodating chamber 14 into a plurality of independent air ducts 15. In this embodiment, the partition 16 is provided in the housing 1, and the partition 16 and the inner wall of the accommodating chamber 14 together divide the accommodating chamber 14 into a plurality of air ducts 15. The partition 16 can be provided longitudinally, and in this case, the length direction of the air duct 15 can be provided longitudinally (e.g., Figure 2 As shown, the length direction of the partition is the up-down direction); of course, the partition 16 can also be arranged horizontally, in which case the length direction of the air duct 15 is arranged horizontally.

[0052] According to one embodiment of the present invention, a plurality of partitions 16 are provided in the shell 1, and the plurality of partitions 16 are parallel to each other and spaced apart to divide the accommodating cavity 14 into a plurality of the air ducts 15; in this embodiment, the shell 1 is a frame-type structure, that is, the shell 1 includes a top plate 11, a bottom plate 12 and two side plates 13, and the two side plates 13 are respectively connected between the bottom plate 12 and the top plate 11, and are connected at the edges of the bottom plate 12 and the top plate 11; preferably, the shell 1 is a rectangular frame-shaped structure, and the two open ends of the shell 1 are respectively the air inlet end and the air outlet end, the air inlet 151 faces the air inlet end side, and the air outlet faces the air outlet end side; the upper end of the partition 16 is connected to the inner wall of the top plate 11, and the lower end of the partition 16 is connected to the inner wall of the bottom plate 12; preferably, the partition 16 is connected to the The top plate 11 and the bottom plate 12 are connected vertically, that is, the partition 16 is parallel to the side plate 13; multiple partitions 16 are parallel to each other to divide the accommodating chamber 14 into multiple air ducts 15. For example, nine partitions 16 are provided in the shell 1, and the nine partitions 16 are arranged in the accommodating chamber 14 along the longitudinal interval to divide the accommodating chamber 14 into ten air ducts 15. A first rotating shaft 21 is installed in each air duct 15, and each first rotating shaft 21 is equipped with at least one blade 22; the blade 22 uses the flue gas flowing in the system as power to rotate around the first rotating shaft 21. After the grease particles or smoke dust particles in the flue gas contact the blade 22, they are thrown onto the inner wall of the top plate 11, the bottom plate 12, the side plate 13 or the partition 16 under the action of centrifugal force. Therefore, there will be no problem of grease clogging the air duct 15, which can reduce the system resistance and improve the flue gas purification efficiency.

[0053] Among them, in this embodiment, the shape of the shell 1 is not limited to a rectangular frame structure. For example, the shell 1 can also be a trapezoidal frame, a parallelogram frame, a triangular frame or even other irregular frame structures. As long as the two ends of the shell 1 can be opened and the interior is divided into multiple air ducts 15 by partitions 16, the design concept of the present invention can be realized and should fall within the scope of protection of the present invention.

[0054] According to one embodiment of the present invention, Figure 3 、 Figure 6 and Figure 7 As shown, the blade 22 is a long strip structure, and the length direction of the blade 22 extends along the length direction of the partition 16; in this embodiment, the blade 22 fills the entire air duct 15 in the length direction (up and down direction) to ensure that the flue gas entering from any position in the height direction is purified by the blade 22 before being discharged through the air outlet, that is, all the flue gas needs to pass through the blade 22 to separate the solid particles at high speed before being discharged, so as to avoid the situation where the flue gas is discharged without being purified.

[0055] like Figure 6 and Figure 7 As shown, the cross-sectional shape of the blade 22 is arc-shaped. The arc-shaped blade 22 can be beneficial to the separation of oil fume particles in the flue gas, that is, when the blade 22 rotates, the oil fume particles on the arc-shaped surface of the blade 22 are more easily thrown out, thereby improving the purification effect of the flue gas.

[0056] According to one embodiment of the present invention, the surface of the blade 22 is provided with an oleophobic layer. By providing the oleophobic layer, grease particles on the blade 22 are more easily removed, thereby preventing oil from being deposited on the blade 22. In this embodiment, the oleophobic layer can be made of an existing oleophobic material, for example, the blade 22 is made of polytetrafluoroethylene, or the surface of the blade 22 is coated with silicon dioxide.

[0057] like Figure 3 and Figure 6 As shown, there are multiple blades 22, and the multiple blades 22 are spaced and evenly distributed around the first rotating shaft 21, wherein multiple groups of arc-shaped blades 22 are connected to the first rotating shaft 21 to form a drum-shaped impeller structure. Figure 6 As shown, the plurality of blades 22 are arranged in pairs, and the maximum distance between the lines connecting two pairs of blades 22 is the diameter of the rotation trajectory of the blade 22, wherein the diameter of the rotation trajectory of the blade 22 is slightly smaller than the width of the air duct 15. This can avoid the situation where the flue gas is directly discharged without being purified due to the large gap between the blade 22 and the side wall of the air duct 15, and can improve the effect of flue gas purification.

[0058] According to one embodiment of the present invention, Figure 3 、 Figure 8 and Figure 9 As shown, the oil fume filtering device also includes a cleaning component 3, and each of the air ducts 15 is provided with a group of the cleaning components 3, and the cleaning components 3 are used to clean the blades 22; in this embodiment, the blades 22 are rotated to throw the grease particles onto the wall of the air duct 15 through centrifugal force. Due to the strong adhesion of grease, some grease particles may be deposited and adhered to the blades 22. The accumulation of grease particles on the blades 22 will increase the power required for rotation, thereby causing the rotation resistance of the blades 22 to increase, affecting the flue gas purification effect. Therefore, in this embodiment, a cleaning component 3 is provided in each air duct 15, and the cleaning component 3 can remove the grease attached to the blades 22, thereby improving the flue gas purification effect.

[0059] According to one embodiment of the present invention, Figure 3 、 Figure 8 and Figure 9As shown, the cleaning assembly 3 includes a brush 32, which is disposed within the air duct 15. During the rotation of the first rotating shaft 21, the brush 32 can come into contact with the blades 22. During use of the oil fume filtering device, the first rotating shaft 21 drives the blades 22 to rotate, and the blades 22 come into contact with the brush 32 during rotation. Grease adhering to the blades 22 is cleaned off by the brush 32, thereby purifying the smoke while simultaneously cleaning the blades 22 in real time. Frequent shutdowns to clean grease adhering to the surfaces of the blades 22 are unnecessary, making use more convenient, reducing the difficulty of cleaning the blades 22, and improving the efficiency of cleaning the blades 22.

[0060] According to one embodiment of the present invention, the cleaning assembly 3 further includes a second rotating shaft 31 capable of rotating about an axis; the second rotating shaft 31 is parallel to the axis of the first rotating shaft 21, and the brush 32 is connected to the second rotating shaft 31; and the first rotating shaft 21 is disposed between the second rotating shaft 31 and the air inlet 151. The cleaning assembly 3 provided in this embodiment includes the second rotating shaft 31, and the brush 32 is disposed on the second rotating shaft 31. When the first rotating shaft 21 drives the blades 22 to rotate, the blades 22 contact the brush 32 on the second rotating shaft 31, and the brush 32 drives the second rotating shaft 31 to rotate. The first rotating shaft 21 and the second rotating shaft 31 rotate in opposite directions, which can improve the efficiency of the brush 32 in removing grease from the surface of the blades 22. At the same time, after the brush 32 brushes off the grease on the blades 22, the grease on the brush 32 is thrown onto the inner wall of the air duct 15 under the action of centrifugal force, thereby preventing the accumulation of grease particles on the brush 32. In this embodiment, the first rotating shaft 21 is arranged between the second rotating shaft 31 and the air inlet 151, that is, the purification component 2 is arranged at the air inlet 151 of the air duct 15, and the cleaning component 3 is arranged at the air outlet of the air duct 15. The smoke first passes through the blades 22 to throw the grease particles onto the wall of the air duct 15. At the same time, a small amount of grease is deposited on the blades 22 due to sticky adhesion. The blades 22 come into contact with the brush 32 during the rotation process, and the grease on the blades 22 is simultaneously removed by the brush 32.

[0061] like Figure 8 and Figure 9As shown, the second rotating shaft 31 is provided with multiple rows of brushes 32, which are spaced and evenly distributed in the circumferential direction of the second rotating shaft 31. The multiple rows of brushes 32 are arranged along the radial direction of the second rotating shaft 31, and the brushes 32 are also long and strip-shaped. The length direction of the brushes 32 extends along the length direction of the blade 22 (the up and down direction is the length direction of the brushes). The brushes 32 can cover the blade 22 in the length direction, thereby being able to clean the entire blade 22 along the length direction. After the second rotating shaft 31 and the brushes 32 are connected, the whole is cylindrical. The end of the brush 32 away from the second rotating shaft 31 can contact the end of the blade 22 close to the first rotating shaft 21, that is, the entire side of the blade 22 can contact the brush 32.

[0062] It can be understood that in this embodiment, there can be only one brush 32, or the brush 32 can be fixed, which can also achieve the purpose of cleaning the blade 22 by the brush 32 in this application. Its purpose does not deviate from the design concept of the present invention and should fall within the scope of protection of the present invention.

[0063] According to one embodiment of the present invention, Figures 1 to 3 and Figure 10 As shown, the oil fume filtering device further includes a reversing assembly 4, which is used to switch the rotation direction of the first rotating shaft 21. Since the purification assembly 2 provided by the present invention separates grease particles by rotating the blades 22, and when the blades 22 rotate in one direction, only the surface of the blades 22 on one side can contact the brush 32, the blades 22 can only clean the grease on the surface of one side through the brush 32, while some grease may also be deposited on the surface of the other side. Therefore, a reversing assembly 4 is provided in the present application, and the rotation direction of the first rotating shaft 21 can be changed by the reversing assembly 4. When there is a lot of grease deposited on the surface of one side that has not been cleaned by the blades 22, the rotation direction of the first rotating shaft 21 can be switched by the reversing assembly 4, and the blades 22 rotate in the opposite direction, and the brush 32 cleans the surface that has not been cleaned before.

[0064] According to one embodiment of the present invention, Figures 1 to 3 and Figure 10 As shown, the reversing assembly 4 includes a baffle 43 and a driving mechanism. The baffles 43 are arranged in a one-to-one correspondence with the air duct 15. Each baffle 43 can partially block the air inlet 151. The driving mechanism can drive the baffle 43 to translate to change the area of ​​the air inlet 151 blocked by the baffle 43. In this embodiment, the baffle 43 can partially block the air inlet 151 of the air duct 15. When the oil fume filtering device is working normally, Figure 4As shown, the baffle 43 is aligned with the right edge of the air duct 15, and an opening is formed on the left side. The air duct 15 takes in air from the left side of the air inlet 151, and the smoke can enter tangentially, causing the smoke to swirl, blowing the blades 22 to drive the first rotating shaft 21 to rotate clockwise. At this time, the brush 32 rotates counterclockwise with the second rotating shaft 31, so that only the outer arc surface of the blade 22 is in contact with the brush 32. As the impeller rotates, the brush 32 can clean the grease on the outer arc surface of the impeller, but because the blade 22 rotates clockwise, the inner arc surface of the blade 22 does not contact the brush 32, and the grease on the inner arc surface cannot be cleaned.

[0065] like Figure 5 As shown, when a certain amount of grease is deposited on the inner arc surface, the oil mesh filter device needs to be self-cleaned. The baffle 43 is driven to move to the left by the driving mechanism. The baffle 43 is aligned with the left edge of the air duct 15, and an opening is formed on the right side of the air duct 15. The air enters the air duct 15 from the right side of the air inlet 151, blowing the blade 22 to drive the first rotating shaft 21 to rotate counterclockwise, and the inner arc surface of the blade 22 contacts the brush 32. At this time, the brush 32 rotates clockwise with the second rotating shaft 31, and the inner arc surface of the blade 22 contacts the brush 32, which can clean the grease on the inner arc surface of the blade 22.

[0066] like Figure 10 As shown, the drive mechanism includes a push rod 41 and a propeller 42. The propeller 42 is connected to the push rod 41 to drive the push rod 41 to move linearly. A plurality of baffles 43 are respectively connected to the push rod 41 and are located on the same side of the push rod 41. Preferably, in this embodiment, the push rod 41 is disposed at the upper end, that is, the lower end of the push rod 41 is connected to multiple baffles 43 at intervals. The right end of the push rod 41 is connected to the propeller 42. The propeller 42 drives the push rod 41 to move left and right, thereby driving the baffles 43 to move left and right, thereby adjusting the area covered by the baffles 43 on the air inlet 151 and switching the rotation direction of the first rotating shaft 21. In this embodiment, the propeller 42 may include a drive motor, which drives the push rod 41 to move linearly through a transmission member (gear rack, ball screw, etc.). Of course, in this embodiment, the propeller 42 may also be a pneumatic cylinder or hydraulic cylinder.

[0067] According to one embodiment of the present invention, the oil fume filtration device further includes a controller and a detection mechanism. The controller is electrically connected to the reversing assembly 4 and the detection mechanism, respectively. The detection mechanism is used to detect information about grease deposited on the blades 22. The control mechanism generates a control instruction based on the grease deposited on the blades 22 detected by the detection mechanism and transmits it to the reversing assembly 4 to control the reversing assembly to start or shut down. When the controller determines that the grease deposited on the blades 22 exceeds a preset threshold value, thereby affecting the oil fume purification efficiency, the controller controls the reversing assembly 4 to start, and the reversing assembly 4 controls the first rotating shaft 21 to rotate in the opposite direction, that is, to control the blades 22 to reverse, thereby cleaning the other side of the blade 22 via the brush 32.

[0068] Optionally, in this embodiment, the detection mechanism includes a pressure sensor, which is used to detect the pressure difference between the air inlet and air outlet of the oil fume filtering device and transmit it to the controller. The controller compares the detected pressure difference with a preset pressure difference threshold and generates a control instruction; when the pressure difference between the air inlet and air outlet of the oil fume purification device detected by the pressure sensor is greater than the preset threshold, it is judged that there is a lot of grease deposited on the other side surface of the blade 22, and the controller controls the reversing component 4 to start, and then switches the first rotating shaft 21 to rotate in the opposite direction.

[0069] In this embodiment, the controller includes a pressure sensor that communicates with the platform, the oil fume filter device, and the cloud platform. When the pressure difference of the oil fume filter device increases to a certain level, it indicates that the air duct resistance is too large. At this time, the signal is transmitted to the cloud platform, and the cloud platform issues a "reverse cleaning" function instruction, starting the propeller 42, and the propeller 42 pushes the push rod 41. The push rod 41 drives the baffle 43 to move, so that the baffle 43 moves to the other side of the air duct 15. At this time, the flue gas passes through the air duct 15 to cause the first rotating shaft to reverse counterclockwise, and the brush 32 on the second rotating shaft 31 cleans the inner curved surface of the blade 22; when the pressure difference decreases to a certain level, it indicates that the inner curved surface of the blade 22 has been cleaned, and the push rod 41 moves in the opposite direction to continue the "purification + self-cleaning" function.

[0070] Based on statistical calculations of pressure sensor signals from cloud platform big data, the standard pressure differential between the "reverse cleaning" and "purification + self-cleaning" functions is continuously calibrated until a reasonable value is reached. Based on big data analysis of user usage, the "reverse cleaning" and "purification + self-cleaning" functions can also be switched on a regular basis to achieve optimal purification efficiency for the fume filtration device, thereby improving the overall purification efficiency of the purifier and reducing the cost of manual cleaning and maintenance.

[0071] The present invention provides a method for controlling an oil fume filter device, using the oil fume filter device described in any of the above embodiments, comprising: detecting a pressure difference T1 between an air inlet end and an air outlet end of the oil fume filter device; comparing the detected pressure difference with a preset pressure difference threshold value T2; when T1>T2, determining that excessive grease is deposited on the blade 22, controlling the reversing component 4 to start, and rotating the first rotating shaft 21 in the opposite direction to clean the inner curved surface of the blade 22.

[0072] Pressure sensor Pressure sensor Pressure sensor

[0073] The working principle of the oil fume filtering device provided by the present invention is described below with reference to the accompanying drawings:

[0074] The oil fume filtering device provided in this embodiment determines the spacing 2r between the partitions 16, the effective radius r of the first rotating shaft 21 and the second rotating shaft 31, and the rotational speed ω according to the amount of smoke and the flow velocity μ, so that the centrifugal force F of most oil fume particles on the rotating blades 22 of the first rotating shaft 21 is greater than the resistance P. The oleophobic layer is provided on the blades 22 of the first rotating shaft 21 to minimize the resistance coefficient δ. The formula is as follows:

[0075]

[0076] The oil fume filtration device utilizes the power of the system's internal fan to drive the first rotating shaft 21 into high-speed rotation as the smoke passes through it. This separates the majority of oil fume particles from the smoke and throws them onto the housing 1 and partition 16, while a smaller portion adheres to the blades 22 of the first rotating shaft 21. As the first rotating shaft 21 rotates, the brush 32 of the second rotating shaft 31, which contacts the blades 22 of the first rotating shaft 21, also rotates at high speed. The high-speed rotation of the brush 32 cleans any remaining oil fume particles from the blades 22. Simultaneously, the oleophobic coating on the brush 32 of the second rotating shaft 31 ensures that the centrifugal force of the high-speed rotation of the brush 32 throws the oil fume particles onto the housing 1 and partition 16. Thus, the dual-shaft structure enables the second rotating shaft 31 to simultaneously clean the first rotating shaft 21 and self-clean. The angle of the blades 22 of the first rotating shaft 21 is set according to the wind speed, effectively separating the oil fume particles as the smoke passes through the first rotating shaft 21.

[0077] Each air duct 15 at the air inlet end of the oil fume filtering device is provided with a baffle 43, which blocks part of the air duct 15 inlet, so that when the smoke flows toward the first rotating shaft 21 blade 22, the smoke can enter tangentially, making the smoke swirl; Figure 4As shown, the blades 22 can rotate clockwise, so that when the first shaft 21 and the blades 22 rotate at high speed, the oil smoke particles can be better separated out along the curved path of the blades 22. When the first shaft 21 rotates clockwise, the first shaft 21 plays a role in purifying the oil smoke particles, and the second shaft 31 plays a role in cleaning the first shaft 21 and self-cleaning. When rotating at high speed, the brush 32 of the second shaft 31 can only brush the outer curved surface of the blades 22 of the first shaft 21, and the inner curved surface cannot be cleaned. When the inner curved surface is deposited with oil for a period of time or to a certain extent, the baffle 43 is driven by the propulsion mechanism, and the push rod 41 is driven by the propeller 42. The push rod 41 is linked to the baffle 43, so that the baffle 43 moves along the axial direction of the push rod 41 to the other side of the air duct 15, as shown Figure 5 At this time, when the smoke flows toward the blade 22 of the first rotating shaft 21, the blade 22 rotates counterclockwise, and the brush 32 of the second rotating shaft 31 cleans the inner curved surface of the blade 22, achieving the purpose of double-sided cleaning.

[0078] Another embodiment of the present invention provides a fume purifier, comprising the fume filter device described in any of the above embodiments, the fume filter device being disposed at the air inlet of the fume purifier. Compared to existing fume purifiers, the fume purifier provided in this embodiment is less susceptible to filter blockage, thereby reducing cleaning frequency. It also enables self-cleaning, reducing cleaning difficulty and costs. It also maintains the pressure within the air duct 15 within a certain range, ensuring efficient fume purification.

[0079] In the description of the present invention, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0080] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. 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, or they can refer to connections between the internal parts of two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0081] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fume filtering device, characterized in that: include: A housing (1) and a purification component (2); A receiving cavity (14) with openings at both ends is formed in the housing (1), at least one air duct (15) is formed in the receiving cavity (14), the air duct (15) having an air inlet (151) and an air outlet relative to each other, and a group of the purification components (2) is provided in each air duct (15); The purification component (2) comprises blades (22) and a first rotating shaft (21) capable of rotating along an axis, the first rotating shaft (21) being arranged in the air duct (15), and at least one blade (22) being connected to the first rotating shaft (21); The oil fume filtering device further comprises a cleaning assembly (3), wherein each of the air ducts (15) is provided with a group of the cleaning assemblies (3), and the cleaning assemblies (3) are used to clean the blades (22); The oil fume filtering device further comprises a reversing assembly (4), wherein the reversing assembly (4) is used to switch the rotation direction of the first rotating shaft (21).

2. The oil fume filtering device according to claim 1, characterized in that: At least one partition (16) is provided in the shell (1), and the at least one partition (16) divides the accommodating cavity (14) into a plurality of mutually independent air ducts (15).

3. The oil fume filtering device according to claim 2, characterized in that: A plurality of partitions (16) are provided in the shell (1), and the plurality of partitions (16) are parallel to each other and spaced apart to separate the accommodating cavity (14) into a plurality of air ducts (15).

4. The oil fume filtering device according to claim 2, characterized in that: The housing (1) is a frame-type structure; The two open ends of the shell (1) are respectively an air inlet end and an air outlet end, the air inlet (151) faces one side of the air inlet end, and the air outlet faces one side of the air outlet end; The upper end of the partition (16) is connected to the inner wall of the top plate of the shell (1), and the lower end of the partition (16) is connected to the inner wall of the bottom plate of the shell.

5. The oil fume filtering device according to claim 2, characterized in that: The blade (22) is a long strip structure, and the length direction of the blade (22) extends along the length direction of the partition (16).

6. The oil fume filtering device according to claim 5, characterized in that: The cross section of the blade (22) is arc-shaped.

7. The oil fume filtering device according to claim 1, characterized in that: An oleophobic layer is provided on the surface of the blade (22).

8. The oil fume filtering device according to claim 1, characterized in that: The cleaning component (3) comprises a brush (32), and the brush (32) is arranged in the air duct (15). During the rotation of the first rotating shaft (21), the brush (32) can come into contact with the blade (22).

9. The oil fume filtering device according to claim 8, characterized in that: The cleaning assembly (3) further comprises a second rotating shaft (31) capable of rotating about an axis; The second rotating shaft (31) and the first rotating shaft (21) are parallel to each other, the brush (32) is connected to the second rotating shaft (31), and the first rotating shaft (21) is arranged between the second rotating shaft (31) and the air inlet (151).

10. The oil fume filtering device according to claim 9, characterized in that: The second rotating shaft (31) is provided with a plurality of rows of brushes (32), and the plurality of rows of brushes (32) are arranged at intervals in the circumferential direction of the second rotating shaft (31).

11. A method for controlling an oil fume filter device, using the oil fume filter device according to any one of claims 1 to 10, characterized in that: include: Detect the pressure difference T1 between the air inlet and outlet of the oil fume filter device; The detected pressure difference is compared with a preset pressure difference threshold value T2, and when T1>T2, the control reversing component (4) is started.

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