An IoT-based odor control device

Abstract

This invention relates to the field of air purification technology, specifically disclosing an odor control device based on the Internet of Things (IoT). The device includes a first filter box with an air inlet groove on its surface and an air outlet groove at its bottom. A second filter box is disposed on the inner wall of the first filter box, containing a filter chamber assembly filled with activated carbon particles. A motor is mounted on the side wall of the second filter box, and a rotating rod is fixedly connected to the motor's output end. The rotating rod passes through the second filter box and is rotatably connected to it. A stirring assembly is fixedly connected to the outer wall of the rotating rod. In use, the motor is started to drive the rotating rod to rotate, which in turn drives the stirring assembly to rotate. The rotation of the stirring assembly causes the activated carbon particles in the filter chamber assembly to move, thereby increasing the contact area between the ambient gas and the activated carbon particles, thus improving filtration efficiency and reducing filtration costs.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, and more specifically, to an odor control device based on the Internet of Things. Background Technology

[0002] Fermentation refers to the process by which microorganisms, under aerobic or anaerobic conditions, produce the microbial cells themselves, or their direct or secondary metabolites. Generally, fermentation refers to a process by which organisms decompose organic matter. Fermentation is one of the earliest biochemical reactions humans encountered and is now widely used in the food, biological, and chemical industries. Fermented foods are a type of food cleverly processed using beneficial microorganisms, possessing unique flavors, enriching our diets, enhancing the texture of food, and increasing its nutritional value. Many families and businesses use fermentation containers, such as earthenware, ceramic, or glass containers, for food fermentation. After processing, the food is placed in the fermentation container and removed after a long period of waiting; the fermentation time is often determined based on experience.

[0003] However, due to a lack of experience, many families are unable to assess the fermentation level, leading to failures. In industrial production utilizing fermentation, large-scale fermentation processes often require significant manpower and resources to monitor the fermentation progress. While intelligent odor sensors are now used to detect the fermentation level, these sensors require odor control after detection. Current control methods typically involve using a fan to expel gas and then ventilating the area, but because the vent is always open, automatic IoT control is not possible. Summary of the Invention

[0004] The purpose of this invention is to provide an odor control device based on the Internet of Things, which aims to effectively solve the problems in the prior art.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] An IoT-based odor control device includes a first filter box installed at the location where odor control is required. The first filter box has an air inlet slot on its surface, located on the side where odor control is needed. An air outlet slot is located at the bottom of the first filter box, on the outdoor side. A second filter box is installed on the inner wall of the first filter box, containing a filter chamber assembly filled with activated carbon particles. A motor is mounted on the side wall of the second filter box, and a rotating rod is fixedly connected to the output end of the motor. The rotating rod passes through the second filter box and is rotatably connected to it. A stirring assembly is fixedly connected to the outer wall of the rotating rod.

[0007] A fan is installed in the air intake slot, and a cover plate is hinged to one side of the fan. A cylinder is hinged to the cover plate, and an odor monitoring sensor is provided on the outside of the cover plate. A control switch assembly is installed on the outside of the first filter box.

[0008] In a preferred embodiment of the present invention, a first filter screen is provided on the surface of the second filter box, and a second filter screen is fixedly connected to the bottom of the second filter box. The inner diameter of the filter holes of the first filter screen and the second filter screen is smaller than the outer diameter of the activated carbon particles.

[0009] As a preferred embodiment of the present invention, the side wall of the first filter box has a second slot, which matches the second filter box. The side wall of the first filter box has symmetrical grooves, which communicate with the second slot. A sealing gasket is provided in the groove.

[0010] In a preferred embodiment of the present invention, the surface of the second filter box is symmetrically provided with first slots, the first filter screen is snapped into the first slots, the surface of the second filter box is symmetrically provided with positioning slots, the positioning slots are interconnected with the first slots, and the bottom of the first filter screen is symmetrically fixedly connected with positioning blocks, the positioning blocks are matched with the positioning slots.

[0011] As a preferred embodiment of the present invention, the surfaces of the second filter box and the first filter screen are symmetrically provided with first fixing holes, the first fixing holes and the first slots are interconnected, and a first T-shaped post is provided in the first fixing hole.

[0012] As a preferred embodiment of the present invention, the side wall of the second filter box is symmetrically fixedly connected with a connecting plate, the surface of the connecting plate is provided with a second fixing hole, the side wall of the first filter box is symmetrically provided with a third fixing hole, the third fixing hole corresponds one-to-one with the second fixing hole, and a second T-shaped column is provided in the third fixing hole, the second T-shaped column matches the second fixing hole.

[0013] As a preferred embodiment of the present invention, the filter chamber assembly includes an elastic filter assembly disposed inside the first filter;

[0014] The elastic filter assembly includes a filter plate disposed inside the first filter. The filter plate has filter holes evenly distributed on it. The four corners of the filter plate are fixedly connected to the first filter via vibration springs. Spring grooves are provided at the four corners of both the filter plate and the first filter. The vibration springs are installed in the spring grooves, and the two ends of the vibration springs abut against the filter plate and the first filter, respectively.

[0015] In a preferred embodiment of the present invention, the stirring assembly includes a stirring rod fixedly mounted on a rotating rod in a Z-shape, a groove being formed on the stirring rod, a sliding plate being slidably connected within the groove, a spring being installed on the inner side of the sliding plate, limit blocks being provided on both sides of the sliding plate, limit grooves being provided on both sides of the groove, the limit blocks being slidably positioned within the limit grooves, and protrusions being uniformly provided on the outer side of the limit blocks, the protrusions being in contact with the filter plate.

[0016] In a preferred embodiment of the present invention, the control switch assembly includes a PLC controller and a push switch, wherein the PLC controller is electrically connected to an odor monitoring sensor and an air cylinder;

[0017] The push-button switch includes a switch box disposed outside the first filter box, a channel disposed inside the switch box, a contact A disposed at the bottom of the inner side of the channel, a slider slidably disposed inside the channel, and a return spring sleeved on the slider, a contact B disposed at the inner end of the slider, and the contact A and the contact B are matched with each other, and a pressure block is also disposed on the outer side of the cover plate.

[0018] Compared with the prior art, the advantages of this invention are:

[0019] (1) When in use, start the motor to drive the rotating rod to rotate. The rotation of the rotating rod drives the stirring assembly to rotate. The rotation of the stirring assembly causes the activated carbon particles in the filter chamber to move, thereby increasing the contact area between the ambient gas and the activated carbon particles, thereby improving the filtration efficiency and reducing the filtration cost. Through the design of the first filter screen and the second filter screen, the flow of ambient gas is facilitated and the activated carbon particles are prevented from flowing out of the filter holes of the first filter screen and the second filter screen during the movement.

[0020] (2) When assembling the first filter screen and the second filter box through the mutual cooperation between the positioning block and the positioning groove, the positioning block is snapped into the positioning groove. At this time, the first filter screen is snapped into the first slot. Through the mutual cooperation between the first fixing hole and the first T-shaped post, it is convenient to fix the position of the first filter screen. Through the design of the second slot, it is convenient to snap the second filter box into the second slot during use, align the second fixing hole with the third fixing hole, and snap the second T-shaped post through the second fixing hole into the third fixing hole, thereby realizing the assembly of the second filter box and the first filter box.

[0021] (2) The odor monitoring sensor can monitor changes in environmental odor in real time and transmit electrical signals to the PLC controller. The PLC controller can control the operation of the cylinder. When a change in odor is detected, the cylinder runs and can drive the cover to open. During the opening process, the pressure block on the cover can contact the slider, thereby suppressing the movement of the slider. When the slider moves, the contact point B on the slider contacts the contact point A, thereby energizing the switch. Pressing the switch can control the operation of the fan. It should be noted that the cover is closed when no air exchange is performed, which can maintain the stability of the odor for as long as possible and prevent dust from entering the filter box, thus realizing automatic control of the Internet of Things. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a side view of the structure of the present invention;

[0024] Figure 3 This is a partial structural diagram of the present invention;

[0025] Figure 4 For the present invention Figure 3 A schematic diagram of the AA cross-sectional structure in the diagram;

[0026] Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B in the diagram;

[0027] Figure 6 This is a schematic diagram of the push-button switch structure of the present invention;

[0028] Figure 7 This is a schematic diagram of the stirring rod structure of the present invention;

[0029] Figure 8 This is a schematic diagram of the elastic filter assembly structure of the present invention.

[0030] Explanation of the labels in the diagram:

[0031] 1. First filter box; 2. Air inlet slot; 3. Air outlet slot; 4. Second filter box; 5. Filter chamber assembly; 6. Activated carbon granules; 7. Motor; 8. Rotating rod; 9. Stirring assembly; 10. First filter screen; 11. Second filter screen; 12. First slot; 13. Positioning slot; 14. Positioning block; 15. Second slot; 16. Sealing gasket; 17. Groove; 18. First fixing hole; 19. First T-shaped column; 20. Connecting plate; 21. Second fixing hole; 22. Third fixing hole; 23. Second T-shaped column 24. Fan; 25. Cover plate; 26. Cylinder; 27. Odor monitoring sensor; 28. Control switch assembly; 29. ​​Elastic filter assembly; 30. Filter plate; 31. Vibration spring; 32. Spring groove; 33. Stirring rod; 34. Slide groove; 35. Slide plate; 36. Spring; 37. Limiting block; 38. Limiting groove; 39. Protrusion; 40. Press switch; 41. Switch box; 42. Channel; 43. Contact A; 44. Slider; 45. Contact B; 46. Pressure block; 47. Return spring. Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0034] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0035] Please see Figure 1-8An odor control device based on the Internet of Things includes a first filter box 1, which is installed at the location where odor control is required. The surface of the first filter box 1 has an air inlet groove 2 located on the side where odor control is required. The bottom of the first filter box 1 has an air outlet groove 3 located on the outdoor side. A second filter box 4 is provided on the inner wall of the first filter box 1. A filter chamber assembly 5 is provided inside the second filter box 4. The filter chamber assembly 5 is filled with activated carbon particles 6. A motor 7 is installed on the side wall of the second filter box 4. A rotating rod 8 is fixedly connected to the output end of the motor 7. The rotating rod 8 passes through the second filter box 4 and is rotatably connected to the second filter box 4. A stirring assembly 9 is fixedly connected to the outer wall of the rotating rod 8.

[0036] A fan 24 is installed inside the air intake slot 2, and a cover plate 25 is hinged to one side of the fan 24. A cylinder 26 is hinged to the cover plate 25. An odor monitoring sensor 27 is installed on the outside of the cover plate 25. A control switch assembly 28 is installed on the outside of the first filter box 1. In use, the odor monitoring sensor 27 monitors the ambient odor and is linked with the control switch assembly 28, so that the control switch assembly 28 can control the operation of the fan 24 and the cylinder 26. The start motor 7 drives the rotating rod 8 to rotate. The rotation of the rotating rod 8 drives the stirring assembly 9 to rotate. The rotation of the stirring assembly 9 causes the activated carbon particles 6 in the filter chamber assembly 5 to move, thereby increasing the contact area between the ambient gas and the activated carbon particles 6, thereby improving the filtration efficiency and reducing the filtration cost. Thus, the odor in the internal environment can be filtered and discharged to the outside, achieving the purpose of odor control.

[0037] Please see Figure 4 The surface of the second filter box 4 is provided with a first filter screen 10, and the bottom of the second filter box 4 is fixedly connected with a second filter screen 11. The inner diameter of the filter holes of the first filter screen 10 and the second filter screen 11 is smaller than the outer diameter of the activated carbon particles 6. The design of the first filter screen 10 and the second filter screen 11 facilitates the flow of ambient gas and prevents the activated carbon particles 6 from flowing out of the filter holes of the first filter screen 10 and the second filter screen 11 during the activity.

[0038] Please see Figure 1-5 The first filter box 1 has a second slot 15 on its side wall, which matches the second filter box 4. The design of the second slot 15 makes it easy to snap the second filter box 4 into the second slot 15 during use, thereby realizing the assembly of the second filter box 4 and the first filter box 1. The side wall of the first filter box 1 has symmetrical grooves 17, which are interconnected with the second slot 15. A sealing gasket 16 is provided in the groove 17. The design of the sealing gasket 16 improves the airtightness of the device.

[0039] Please see Figure 4The surface of the second filter box 4 is symmetrically provided with first slots 12, and the first filter screen 10 is snapped into the first slots 12. The surface of the second filter box 4 is symmetrically provided with positioning slots 13, which are interconnected with the first slots 12. The bottom of the first filter screen 10 is symmetrically fixedly connected with positioning blocks 14, which are matched with the positioning slots 13. When assembling the first filter screen 10 and the second filter box 4, the positioning blocks 14 are snapped into the positioning slots 13, and the first filter screen 10 is snapped into the first slots 12.

[0040] Please see Figure 5 The second filter box 4 and the first filter screen 10 are symmetrically provided with first fixing holes 18. The first fixing holes 18 and the first slot 12 are interconnected. A first T-shaped post 19 is provided in the first fixing hole 18. The position of the first filter screen 10 is conveniently fixed by the mutual cooperation between the first fixing hole 18 and the first T-shaped post 19.

[0041] Please see Figure 5 The second filter box 4 is symmetrically fixedly connected to a connecting plate 20. The surface of the connecting plate 20 is provided with a second fixing hole 21. The side wall of the first filter box 1 is symmetrically provided with a third fixing hole 22. The third fixing hole 22 corresponds one-to-one with the second fixing hole 21. A second T-shaped post 23 is provided in the third fixing hole 22. The second T-shaped post 23 matches the second fixing hole 21. Through the cooperation between the second fixing hole 21, the third fixing hole 22, and the second T-shaped post 23, when installing the second filter box 4, the second fixing hole 21 and the third fixing hole 22 are aligned, and the second T-shaped post 23 passes through the second fixing hole 21 and is snapped into the third fixing hole 22, thereby fixing the position of the second filter box 4.

[0042] The filter chamber assembly 5 includes an elastic filter assembly 29 disposed inside the first filter 10;

[0043] The elastic filter assembly 29 includes a filter plate 30 disposed inside the first filter 10. The filter plate 30 has filter holes evenly distributed on it. The four corners of the filter plate 30 are fixedly connected to the first filter 10 through vibration springs 31. Spring grooves 32 are provided at the four corners of the filter plate 30 and the four corners of the first filter 10. The vibration springs 31 are installed in the spring grooves 32, and the two ends of the vibration springs 31 abut against the filter plate 30 and the first filter 10, respectively.

[0044] The stirring assembly 9 includes a stirring rod 33 fixedly mounted on a rotating rod 8 and arranged in a Z-shape. A groove 34 is provided on the stirring rod 33. A sliding plate 35 is slidably connected in the groove 34. A spring 36 is installed on the inner side of the sliding plate 35. Limiting blocks 37 are provided on both sides of the sliding plate 35. Limiting grooves 38 are provided on both sides of the groove 34. The limiting blocks 37 are slidably positioned in the limiting grooves 38. Protrusions 39 are evenly provided on the outer side of the limiting blocks 37. The protrusions 39 are in contact with the filter plate 30.

[0045] When the stirring rod 33 rotates, the sliding plate 35 on the stirring rod 33 has a certain degree of mobility due to the restriction of the spring 36. When the stirring rod 33 rotates to contact the filter plate 30, it can drive the filter plate 30 to vibrate, thereby shaking off the dust on the filter plate 30 and preventing the filter holes on the filter plate 30 from becoming clogged due to prolonged ventilation.

[0046] The control switch assembly 28 includes a PLC controller and a push switch 40. The PLC controller is electrically connected to the odor monitoring sensor 27 and to the cylinder 26.

[0047] The push-button switch 40 includes a switch box 41 disposed outside the first filter box 1. A channel 42 is disposed inside the switch box 41. A contact A43 is disposed at the bottom of the inner side of the channel 42. A slider 44 is slidably disposed inside the channel 42, and a return spring 47 is sleeved on the slider 44. A contact B45 is disposed at the inner end of the slider 44. The contacts A43 and B45 are matched with each other. A pressure block 46 is also disposed on the outer side of the cover plate 25.

[0048] In use, the odor monitoring sensor 27 can monitor changes in ambient odor in real time and transmit electrical signals to the PLC controller. The PLC controller can control the operation of the cylinder 26. When an odor change is detected, the cylinder 26 operates, which can drive the cover 25 to open. During the opening process, the pressure block 46 on the cover 25 can contact the slider 44, thereby suppressing the movement of the slider 44. When the slider 44 moves, the contact B45 on the slider 44 contacts the contact A43, thereby energizing the switch. Pressing the switch 40 can control the operation of the fan 24. It should be noted that the cover 25 is closed when not ventilating, which can maintain the stability of the odor for as long as possible and prevent dust from entering the filter box, realizing automatic control of the Internet of Things.

[0049] Working principle:

[0050] In use, the odor monitoring sensor 27 can monitor changes in ambient odor in real time and transmit electrical signals to the PLC controller. The PLC controller can control the operation of the cylinder 26. When an odor change is detected, the cylinder 26 operates, which can drive the cover 25 to open. During the opening process, the pressure block 46 on the cover 25 can contact the slider 44, thereby suppressing the movement of the slider 44. When the slider 44 moves, the contact B45 on the slider 44 contacts the contact A43, thereby energizing the switch. Pressing the switch 40 can control the operation of the fan 24. It should be noted that the cover 25 is closed when not ventilating, which can maintain the stability of the odor for as long as possible and prevent dust from entering the filter box, realizing automatic control of the Internet of Things. Activated carbon granules 6 are placed in... Inside the filter chamber assembly 5, the positioning block 14 is engaged in the positioning groove 13. At this time, the first filter screen 10 is engaged in the first slot 12, and the first T-shaped post 19 is engaged in the first fixing hole 18, thereby fixing the position of the first filter screen 10. The second filter box 4 is engaged in the second slot 15. At this time, the second fixing hole 21 and the third fixing hole 22 are aligned. The second T-shaped post 23 passes through the second fixing hole 21 and is engaged in the third fixing hole 22, thereby fixing the position of the second filter box 4. The motor 7 is started to drive the rotating rod 8 to rotate. The rotation of the rotating rod 8 drives the stirring assembly 9 to rotate. The rotation of the stirring assembly 9 causes the activated carbon particles 6 in the filter chamber assembly 5 to move, thereby increasing the contact area between the ambient gas and the activated carbon particles 6, thereby improving the filtration efficiency and reducing the filtration cost.

[0051] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. An odor control device based on the Internet of Things, comprising a first filter box (1), the first filter box (1) being installed at the location where odor control is required, an air inlet groove (2) being formed on the surface of the first filter box (1) and located on the side where odor control is required, and an air outlet groove (3) being formed at the bottom of the first filter box (1) and located on the outdoor side, characterized in that: The inner wall of the first filter box (1) is provided with a second filter box (4), the second filter box (4) is provided with a filter cavity assembly (5) inside, the filter cavity assembly (5) is filled with activated carbon particles (6), the side wall of the second filter box (4) is provided with a motor (7), the output end of the motor (7) is fixedly connected with a rotating rod (8), the rotating rod (8) penetrates through the second filter box (4), and the rotating rod (8) is rotatably connected with the second filter box (4); the outer wall of the rotating rod (8) is fixedly connected with a stirring assembly (9). The air inlet groove (2) is provided with a fan (24), and a cover plate (25) is hingedly connected to one side of the fan (24); the cover plate (25) is hingedly connected with an air cylinder (26); the outer side of the cover plate (25) is provided with an odor monitoring sensor (27); and the outer side of the first filter box (1) is provided with a control switch assembly (28). The stirring assembly (9) comprises a Z-shaped stirring rod (33) fixedly installed on the rotating rod (8); the stirring rod (33) is provided with a sliding groove (34); the sliding groove (34) is slidably connected with a sliding plate (35); the inner side of the sliding plate (35) is provided with a spring (36); the two sides of the sliding plate (35) are provided with limiting blocks (37); the two sides of the sliding groove (34) are provided with limiting grooves (38); the limiting blocks (37) are limitedly and slidably arranged in the limiting grooves (38); the outer side of each limiting block (37) is uniformly provided with a protruding block (39); and the protruding blocks (39) are in contact with the filter plate (30). The control switch assembly (28) comprises a PLC controller and a press switch (40); the PLC controller is electrically connected with the odor monitoring sensor (27); and the PLC controller is electrically connected with the air cylinder (26). The press switch (40) comprises a switch box (41) arranged on the outer side of the first filter box (1); the switch box (41) is provided with a channel (42); the inner bottom of the channel (42) is provided with a contact A (43); the channel (42) is slidably provided with a sliding block (44); the sliding block (44) is sleeved with a reset spring (47); the inner end of the sliding block (44) is provided with a contact B (45); the contact A (43) and the contact B (45) are matched with each other; and the outer side of the cover plate (25) is further provided with a pressing block (46).

2. The odor control device based on the Internet of Things according to claim 1, characterized in that: The surface of the second filter box (4) is provided with a first filter screen (10); the bottom of the second filter box (4) is fixedly connected with a second filter screen (11); and the inner diameters of the filter holes of the first filter screen (10) and the second filter screen (11) are all smaller than the outer diameter of the activated carbon particles (6).

3. The odor control device based on Internet of Things according to claim 2, characterized in that: The side wall of the first filter box (1) is provided with a second clamping groove (15); the second clamping groove (15) is matched with the second filter box (4); the side wall of the first filter box (1) is symmetrically provided with a groove (17); the groove (17) is in communication with the second clamping groove (15); and the groove (17) is provided with a sealing gasket (16).

4. The odor control device based on the Internet of Things according to claim 3, characterized in that: The surface of the second filter box (4) is symmetrically provided with a first clamping groove (12), the first filter screen (10) is clamped in the first clamping groove (12), the surface of the second filter box (4) is symmetrically provided with a positioning groove (13), the positioning groove (13) and the first clamping groove (12) are mutually through, the bottom of the first filter screen (10) is fixedly connected with a positioning block (14) in symmetry, and the positioning block (14) and the positioning groove (13) are matched with each other.

5. The odor control device based on the Internet of Things according to claim 4, characterized in that: The surface of the second filter box (4) and the first filter screen (10) are symmetrically provided with a first fixing hole (18), the first fixing hole (18) and the first clamping groove (12) are mutually through, and the first fixing hole (18) is provided with a first T-shaped column (19).

6. The odor control device based on the Internet of Things according to claim 5, characterized in that: The sidewall of the second filter box (4) is fixedly connected with a connecting plate (20) in symmetry, the surface of the connecting plate (20) is provided with a second fixing hole (21), the sidewall of the first filter box (1) is symmetrically provided with a third fixing hole (22), the third fixing hole (22) and the second fixing hole (21) correspond to each other, the third fixing hole (22) is provided with a second T-shaped column (23), and the second T-shaped column (23) and the second fixing hole (21) are matched with each other.

7. The odor control device based on the Internet of Things according to claim 1, characterized in that: The filter cavity assembly (5) comprises an elastic filter screen assembly (29) arranged in the inside of the first filter screen (10). The elastic filter screen assembly (29) comprises a filter plate (30) arranged in the inside of the first filter screen (10), the filter plate (30) is uniformly provided with filter holes, the four corners of the filter plate (30) are fixedly connected with the first filter screen (10) through vibration springs (31), the four corners of the filter plate (30) and the four corners of the first filter screen (10) are provided with spring grooves (32), the vibration springs (31) are installed in the spring grooves (32), and the two ends of the vibration springs (31) are respectively abutted on the filter plate (30) and the first filter screen (10).

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