A kind of automatic flushing device for sanitation vehicle filter screen blockage and its using method

Abstract

This invention discloses an automatic flushing device for sanitation vehicle filter clogging and its usage method, comprising: a sanitation vehicle body, a suction cylinder, wherein airflow inside the suction cylinder is drawn in by a fan; a filter assembly, wherein garbage sucked in by the suction cylinder is filtered by the filter assembly and falls into the receiving box of the sanitation vehicle body; and a wind sensing assembly, which includes an air duct facing the filter assembly, several wind speed sensors, and a filter flushing pipe, wherein the wind speed sensors detect the airflow blowing from the filter assembly into the air duct; when the real-time power of the fan decreases due to the filter assembly being blocked, and the real-time airflow of the wind speed sensors decreases, the filter flushing pipe flushes the filter assembly, thereby filtering the garbage sucked in by the sanitation vehicle and removing garbage blocked on the filter, ensuring that the filter is always in a state of high-efficiency ventilation and filtration, and ensuring the air intake and suction effect of the sweeper operation.

Description

Technical Field

[0001] This invention relates to a sanitation vehicle, and more particularly to an automatic flushing device for clogging the filter screen of a sanitation vehicle and its usage method. Background Technology

[0002] Sanitation vehicles are a type of road cleaning vehicle, also known as sweeper trucks, vacuum trucks, or road sweepers. They generally use a blower to draw ground garbage into a garbage bin through a suction nozzle, and then filter it to clean up the garbage and dust on the road they pass through, thus cleaning municipal roads.

[0003] Existing patent CN209138202U discloses a filter locking mechanism for sanitation vehicles, proposing a method for fixing the filter in the garbage bin, but it does not address the cleaning of the garbage bin filter. Patent CN110241760A discloses a self-cleaning structure for the filter in a sanitation vehicle garbage bin, a sanitation vehicle, and a self-cleaning method. It controls the opening and closing of the filter relative to the filter compartment bottom plate through a telescopic actuator, achieving automatic cleaning of the filter inside the garbage bin. This self-cleaning is achieved by controlling the opening and closing collision of the filter, and it also... The filter can only be cleaned after the vehicle stops working and the garbage bin is tipped over. The patent with publication number "CN18495295U discloses an air conditioner filter detection device and air conditioner" detects the filter clogging by detecting the DC voltage of the motor. However, because the road surface contains light, flake-shaped objects such as leaves and plastic bags, the filter is extremely easy to get clogged when the sweeper encounters such garbage. At this time, the air intake of the fan will be reduced, which will affect the working effect of the cleaning vehicle. Currently, the garbage bin filter can only be cleaned by raising the garbage bin, and automatic detection and cleaning cannot be achieved.

[0004] Therefore, this case aims to provide an automatic flushing device for sanitation vehicle filter clogging and its usage method, which can filter the garbage sucked in by the sanitation vehicle and remove the garbage blocked on the filter, so that the filter is always kept in a state of high-efficiency ventilation and filtration, ensuring the air intake and suction effect of the sweeper operation. Summary of the Invention

[0005] This invention provides an automatic flushing device for clogging the filter screen of a sanitation vehicle and its usage method, which can effectively solve the above-mentioned problems.

[0006] This invention is implemented as follows:

[0007] An automatic flushing device for clogging filters in sanitation vehicles, comprising:

[0008] A sanitation vehicle body, wherein at least one container for holding garbage is provided inside the sanitation vehicle body;

[0009] At least one suction cylinder is installed inside the sanitation vehicle with its air inlet end pointing towards the ground. The airflow inside the suction cylinder is generated by a fan.

[0010] A filter assembly is provided, through which the garbage sucked in by the suction cylinder is filtered and falls into the container of the sanitation vehicle.

[0011] A wind sensing component, the wind sensing component includes an air duct facing the filter assembly, and a plurality of wind speed sensors disposed at the air outlet of the sanitation vehicle body for detecting the wind force of the filter assembly, and a filter flushing pipe electrically connected to the wind speed sensors and facing the filter assembly, the wind speed sensors detecting the amount of air blown into the air duct from the filter assembly;

[0012] When the real-time power of the fan decreases due to the filter assembly being blocked, and the real-time airflow of the wind speed sensor decreases, the filter flushing pipe flushes the filter assembly.

[0013] As a further improvement, a flow deflector is also included above the suction cylinder, which guides the item sucked in by the suction cylinder to the receiving box.

[0014] As a further improvement, the filter assembly includes a first filter plate near the suction cylinder and a second filter plate close to the first filter plate and near the filter flushing pipe. The first filter plate and the second filter plate have the same shape and size, and the filter holes of the first filter plate and the second filter plate are aligned with each other. The first filter plate is welded to the sanitation vehicle body, and the second filter plate moves relative to the first filter plate.

[0015] As a further improvement, the filter assembly also includes a guide rib disposed on the back of the first filter plate, one side of the second filter plate sliding with the guide rib, a lateral shifting structure locked on the second filter plate, the top of the lateral shifting structure being locked on the second filter plate, and the lateral shifting structure driving the second filter plate to move relative to the first filter plate when it moves up and down.

[0016] As a further improvement, the lateral displacement structure includes a crescent plate welded to the side of the second filter plate away from the guide rib, connecting sleeves screwed to both sides of the crescent plate, a docking shaft through which the two connecting sleeves are disposed, and two pushing members sleeved on the docking shaft.

[0017] As a further improvement, a double-ring seat is sleeved on the output shaft of the two pushers, so that after one pusher is pushed out, the other pusher is pushed out under the restraint of the double-ring seat.

[0018] As a further improvement, it also includes an alignment member disposed on the first filter plate, which is pushed out and penetrates the first filter plate and the second filter plate after the second filter plate is moved.

[0019] As a further improvement, the alignment member includes a power unit locked to the bottom corner of the front of the first filter plate, and a connecting part connected to the power unit and passing through the first filter plate and the second filter plate after being pushed out.

[0020] As a further improvement, the outer cover of the alignment member is provided with a guide slope, the inclined surface of which points to the middle of the first filter plate. An arch plate is provided in the middle of the first filter plate, and the wind guided by the guide slope swirls at the position of the arch plate.

[0021] The present invention also provides a method for using an automatic flushing device for clogged sanitation vehicle filters. The method of using the above-mentioned automatic flushing device for clogged sanitation vehicle filters includes the following steps:

[0022] S1; The fan is started simultaneously while the sanitation vehicle is moving. The fan generates suction to suck up dust and garbage on the ground through the suction tube and hit the guide shroud.

[0023] S2; During the filtration process, light and solid impurities are blocked by the filter assembly, while dust and sewage are sucked into the sanitation vehicle for storage.

[0024] S3; Define the rated power of the fan as P0, the calibration parameter of the wind speed sensor as Q0, the power variation coefficient as K1, and the air volume variation coefficient as K2. When the filter assembly is blocked by chunks of garbage, the output power of the fan controlling the suction cylinder is less than P0 due to the reduced air intake surface. At the same time, the air volume received by the air duct is reduced, and the actual air volume Q1 detected by the wind speed sensor is less than Q0. When P1≤K1*P0 and Q1≤K2*Q0 and this continues for T cycles, the filter flushing pipe backflushes the filter assembly.

[0025] S4; After the blockage on the filter assembly is flushed away, the air inlet surface of the filter assembly returns to normal, the output power of the fan P1 is equal to K1*P0, the actual air volume Q1 is equal to K2*Q0, and the filter flushing pipe stops flushing.

[0026] The beneficial effects of this invention are:

[0027] The use of filters in the suction system of sanitation vehicles is very common in the industry. However, since the work location is on the road, the types of garbage on the road are unpredictable. Especially when sucking in light, flaky particles such as leaves, willow catkins, weeds, and plastic flakes, these particles can clog the filter pores, affecting the filtration efficiency and gradually increasing the blockage area, eventually paralyzing the entire suction system. To address this, this invention first proposes monitoring the power of the suction system's fan. When the fan power is less than the rated power, it indicates that the suction system is obstructed, affecting the filter assembly. In addition to addressing blockage, a wind speed sensor is installed at the air inlet of the air duct used for air outlet to detect the amount of air passing through the filter assembly. If the air volume is significantly less than the rated air volume, it indicates that the filter assembly is blocked and air cannot pass through normally. Through a two-stage detection method, the real-time status of the filter assembly can be fed back in a timely manner, thereby determining whether to activate the filter flushing pipe. In order to avoid the filter flushing pipe being activated by mistake, the device will only determine that the filter assembly is blocked and activate the filter flushing pipe if the above two situations occur simultaneously and continue for T cycles. This allows for timely and accurate handling when the filter assembly is blocked.

[0028] To ensure that the airflow from the suction cylinder flows accurately towards the filter assembly and air duct, a guide hood is installed above the suction cylinder. The guide hood can accurately guide the sucked-in air, dust, and dirt towards the receiving box, so that the airflow is not damaged during introduction and does not affect the detection of fan power or the calibration of the wind speed sensor.

[0029] During the negative pressure suction process of sanitation vehicles, not only leaves and plastic pieces are sucked in, but small twigs or bamboo skewers may also be drawn in. Once such substances are sucked into the filter assembly, they become stuck and are difficult to flush away even by the filter flushing pipe. They also obstruct other passing pollutants, creating a large blockage. To address this, the present invention first sets the filter assembly into two filters: a first filter plate and a second filter plate. The first filter plate is fixed and performs a conventional filtration function. However, if a twig gets stuck in the filter assembly, part of it will extend into the second filter plate. This causes the second filter plate to move relative to the first filter plate, breaking the twig and reducing its weight. This allows the lighter twig to be flushed away by the filter flushing pipe.

[0030] In the design of filter plates for sanitation vehicles, metal structures are often used, covering a considerable area and resulting in a heavy overall weight. Furthermore, due to the limited space within the vehicle, large hydraulic cylinders cannot be used. Therefore, how to move heavy filter plates in a confined space is a pain point in the industry. To address this, the lateral shift structure in this invention adopts a pressure-dividing design, which splits the drive end to both ends via a connecting shaft. Pushing components are then installed at both ends of the connecting shaft, with one end driven by two pushing components. This eliminates the need for a large hydraulic cylinder to drive heavy filter plates.

[0031] Although the two-stage design separates the heavy filter plates, it also results in the two pushing parts not being able to push out synchronously. To address this, the present invention proposes to set a double-ring seat on the output rod of the two pushing parts. When one end is pushed out, the other end will also be pushed out under the restraint of the double-ring seat, thereby allowing the two pushing parts to push out almost synchronously.

[0032] If the filter holes of the second filter plate cannot be realigned with those of the first filter plate after relative movement between the second and first filter plates, it will hinder the filtration of the first filter plate. This will prevent the entire filtration system from achieving its filtration effect and will also impede airflow. Furthermore, the power of the fan and the data from the wind speed sensor will consistently fail to reach the correct values. To address this, the present invention provides a power unit on the front side of the first filter plate. Each time the second filter plate moves, the first and second filter plates are aligned via the connecting part of the second filter plate, ensuring that the filter holes of the first and second filter plates overlap, thereby avoiding obstruction of airflow.

[0033] After the problem of misalignment between the first and second filter plates was solved by setting up the power unit, garbage easily stuck to the power unit, which would block the power unit over time. To address this, the present invention sets a guide slope on the outside of the power unit. The guide slope not only blocks the power unit and prevents it from being affected by garbage, but also guides the air on the guide slope to the middle of the first filter plate. An arch plate is then set in the middle of the first filter plate to create turbulence in the airflow, thereby performing a preliminary treatment on the garbage that easily adheres to the first filter plate, making it less likely for garbage to adhere to the first filter plate and less likely to cause blockage. Attached Figure Description

[0034] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0035] Figure 1 This is a three-dimensional structural schematic diagram of an automatic flushing device for clogging filters in sanitation vehicles provided by the present invention.

[0036] Figure 2 This is a top view of a filter assembly provided by the present invention.

[0037] Figure 3 This is a front view structural diagram of a filter assembly provided by the present invention.

[0038] Figure 4 This is a logic control diagram of a filter flushing pipe provided by the present invention.

[0039] Figure 5 This is a flowchart of the automatic flushing device for clogging filters in sanitation vehicles provided by the present invention. Detailed Implementation

[0040] All embodiments of the present invention are intended to fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] In the description of this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating that the purpose, technical solution, and advantages of the method are clearer. The technical solutions in the embodiments of this 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 this invention, not all of them. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort indicate or imply the relative importance of the indicated technical features. Therefore, features defined with "first" and "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0042] Reference Figures 1-5As shown, an automatic flushing device for clogging filters in sanitation vehicles includes: a sanitation vehicle body 10, wherein at least one container for holding garbage is provided inside the sanitation vehicle body 10; at least one suction cylinder 20, wherein the suction cylinder 20 is installed inside the sanitation vehicle body 10 with its air inlet end pointing towards the ground, and the airflow inside the suction cylinder 20 is generated by a fan; a filter assembly, wherein the garbage sucked in by the suction cylinder 20 is filtered by the filter assembly and falls into the container of the sanitation vehicle body 10; and a wind sensing assembly 40, wherein the wind sensing assembly 40 includes a positive... The filter assembly has an air duct 41 and several wind speed sensors 42 installed at the air outlet of the sanitation vehicle body 10 for detecting the wind force of the filter assembly. A filter flushing pipe 43 is electrically connected to the wind speed sensors 42 and faces the filter assembly. The wind speed sensors 42 detect the air volume blown from the filter assembly into the air duct 41. When the real-time power of the fan is reduced due to the filter assembly being blocked, and the real-time air volume of the wind speed sensor 42 is reduced, the filter flushing pipe 43 flushes the filter assembly.

[0043] In this embodiment, the sanitation vehicle body 10 is generally mounted on the frame of the sanitation vehicle, so that it can be used at any location on the municipal street as the sanitation vehicle moves.

[0044] The air outlet of the sanitation vehicle body 10 is the air inlet of the air duct 41, and the air duct 41 is also connected to a fan.

[0045] During the overall operation phase, the first step is to suck up the garbage and sewage from the road surface using the suction cylinder 20, filter them through the filter assembly, and then store them in the sanitation vehicle body 10.

[0046] The use of filters in the suction systems of sanitation vehicles is common in the industry. However, since the work location is on the road, the types of garbage on the road are unpredictable. Especially when sucking in light, flaky particles such as leaves, willow catkins, weeds, and plastic flakes, these particles can clog the filter pores, affecting not only the filtration efficiency but also gradually increasing the blockage area, eventually paralyzing the entire suction system. To address this, this invention first proposes monitoring the power of the suction system's fan. When the fan power is less than the rated power, it indicates that the suction system is obstructed and the filter components are clogged. In addition, a wind speed sensor 42 is installed at the air inlet of the air duct 41 used for air outlet to detect the air volume after passing through the filter assembly. If the air volume is significantly less than the rated air volume, it indicates that the filter assembly is blocked and the air cannot pass through normally. Through the two-stage detection method, the real-time status of the filter assembly can be fed back in time, thereby determining whether to activate the filter flushing pipe 43. In order to avoid the filter flushing pipe 43 being activated by mistake, the device will only determine that the filter assembly is blocked and activate the filter flushing pipe 43 if the above two situations occur at the same time and continue for T cycles. This allows for timely and accurate handling when the filter assembly is blocked.

[0047] The architecture of the control system described above is as follows: Figure 4 As shown, specifically, the fan motor drives the fan independently. The motor controller and the fan motor are electrically connected, outputting three-phase power (U, V, W), and controlling the fan motor's operating speed to be constant at n. The power parameter P1 of the fan motor is collected and uploaded to the upper-mount controller. The information from the wind speed sensor 42 is also uploaded to the upper-mount controller in real time. The upper-mount controller makes a judgment based on the filter washing control strategy and uploads the final information to the upper-mount human-machine interface.

[0048] The specific filter flushing control strategy is as follows: The airflow information Q1 of the garbage bin duct 41 is obtained through the wind speed sensor 42. When the filter assembly is clogged, the real-time airflow Q1 decreases, falling below the calibrated airflow parameter Q0. Simultaneously, the fan's intake airflow decreases, and the output power P1 of the motor driving the fan alone decreases, falling below the calibrated output power P0. The severity of the clogging is determined based on the coefficients K1 and K2. To eliminate other influencing factors, the next step is only taken when both conditions are met simultaneously and the duration reaches T. The specific logic is as follows: Figure 5 As shown.

[0049] When the filter assembly becomes clogged, the upper controller outputs signals A and B respectively. A indicates that the water pump clutch is closed and the water pump is working; B indicates that the air vent shut-off valve is closed and the filter flushing shut-off valve is closed. At this time, the filter flushing pipe 43 located above the filter assembly sprays water to flush.

[0050] To ensure that the airflow from the suction cylinder 20 flows accurately towards the filter assembly and the air duct 41, this embodiment further includes a guide hood 50 disposed above the suction cylinder 20. The guide hood 50 directs the items sucked in by the suction cylinder 20 towards the waste container. By disposing of a guide hood 50 above the suction cylinder 20, the guide hood 50 can accurately guide the sucked-in air, dust, and dirt towards the waste container, thereby preventing air loss during introduction and ensuring that the detection of the fan power and the calibration of the airflow of the wind speed sensor 42 are not affected.

[0051] During the negative pressure suction process of the sanitation vehicle, not only leaves and plastic pieces are sucked in, but small twigs or bamboo sticks may also be sucked in. Once such substances are sucked onto the filter assembly, they will get stuck directly on the filter assembly and are difficult to backwash off even by the rinsing of the filter flushing pipe 43. They will also obstruct other passing dirt, thus forming a large blocking surface. To address this, the filter assembly of the present invention includes a first filter plate 31 near the suction cylinder 20 and a second filter plate 32 closely attached to the first filter plate 31 and near the filter flushing pipe 43. The first filter plate 31 and the second filter plate 32 are the same shape and size, and the filter holes of the first filter plate 31 and the second filter plate 32 are aligned with each other. The first filter plate 31 is welded to the sanitation vehicle body 10, and the second filter plate 32 moves relative to the first filter plate 31. The filter assembly also includes a guide rib disposed on the back of the first filter plate 31. One side of the second filter plate 32 slides with the guide rib and is locked to the second filter plate 32 by a lateral shifting structure 33. The top of the lateral shifting structure 33 is locked to the second filter plate 32. When the lateral shifting structure 33 moves up and down, it drives the second filter plate 32 to move relative to the first filter plate 31. The filter assembly is initially set as two filter plates, namely the first filter plate 31 and the second filter plate 32. The first filter plate 31 is fixed and plays a conventional filtering role. However, if a branch gets stuck in the filter assembly, part of it will extend into the second filter plate 32. The second filter plate 32 will then move relative to the first filter plate 31 through the lateral shifting structure 33, thereby breaking the branch and reducing the weight of the entire branch. This allows the reduced-weight branch to be washed away when the filter flushing pipe 43 is used for rinsing.

[0052] In the design of filter plates for sanitation vehicles, metal structures are often used, covering a considerable area and resulting in a heavy overall weight. Furthermore, due to limited space within the vehicle, large hydraulic cylinders cannot be used. Therefore, how to move heavy filter plates within a confined space is a major challenge in the industry. To address this, the lateral shift structure 33 of this invention includes a crescent-shaped plate 331 welded to the side of the second filter plate 32 away from the guide ribs, connecting sleeves 332 screwed to both sides of the crescent-shaped plate 331, a connecting shaft 333 through which the two connecting sleeves 332 pass, and two pushing members 334 sleeved on the connecting shaft 333. The lateral shift structure 33 adopts a pressure-dividing design, splitting the drive end to both ends via the connecting shaft 333. Pushing members 334 are then positioned at both ends of the connecting shaft 333, with one end driven by the two pushing members 334. This eliminates the need for a large hydraulic cylinder to drive the heavy filter plate.

[0053] Although the heavy filter plate is separated by a two-stage design, the two-stage design also results in the two pushing parts 334 not being able to push out synchronously. To address this, a double-ring seat 335 is fitted onto the output shaft of the two pushing parts 334. After one pushing part 334 is pushed out, the other pushing part 334 is pushed out under the restraint of the double-ring seat 335. The present invention further proposes to set a double-ring seat 335 on the output rod of the two pushing parts 334. When one end is pushed out, the other end will also be pushed out under the restraint of the double-ring seat 335, thereby allowing the two pushing parts 334 to achieve an effect of almost synchronous pushing out.

[0054] After the second filter plate 32 and the first filter plate 31 move relative to each other, if the filter holes of the second filter plate 32 cannot be realigned with the filter holes of the first filter plate 31, it will hinder the filtration of the first filter plate 31. This will prevent the entire filtration system from achieving its filtration effect and will also hinder the airflow. Furthermore, the power of the fan and the data from the wind speed sensor 42 will not reach the correct values. To address this, the present invention further includes an alignment member 34 disposed on the first filter plate 31. The alignment member 34 is pushed out and passes through the first filter plate 31 and the second filter plate 32 after the second filter plate 32 moves. By providing a power unit 341 on the front side of the first filter plate 31, after each positional movement of the second filter plate 32, the first filter plate 31 and the second filter plate 32 will be aligned through the connecting part 342 of the second filter plate 32, so that the filter holes of the first filter plate 31 and the second filter plate 32 overlap, thereby avoiding obstruction of airflow.

[0055] After the installation of the power unit 341 solved the problem of misalignment between the first filter plate 31 and the second filter plate 32, garbage easily adhered to the power unit 341, which would eventually obstruct the power unit 341. To address this, the alignment member 34 of the present invention includes the power unit 341 locked to the bottom corner of the front of the first filter plate 31, and a connecting part 342 connected to the power unit 341 and passing through the first filter plate 31 and the second filter plate 32 after being pushed out. By providing a guide slope 61 on the outside of the power unit 341, the guide slope 61 can not only block the power unit 341 and prevent it from being affected by garbage, but also guide the air on the guide slope 61 towards the middle of the first filter plate 31. Then, an arch plate 62 is provided at the middle position of the first filter plate 31 to create turbulence in the air, thereby performing a preliminary treatment on the garbage that easily adheres to the first filter plate 31, making it less likely for garbage to adhere to the first filter plate 31 and less likely to cause blockage.

[0056] Another embodiment of the present invention also provides a method for using an automatic flushing device for clogged sanitation vehicle filters. The method of using the above-described automatic flushing device for clogged sanitation vehicle filters includes the following steps:

[0057] S1; The fan is started simultaneously while the sanitation vehicle is moving. The fan generates suction to suck up the dust and garbage on the ground through the suction cylinder 20 and hit the guide shroud 50.

[0058] S2; During the filtration process, solid impurities are blocked by the filter assembly, while dust and sewage are sucked into the sanitation vehicle body 10 for storage.

[0059] S3; Define the rated power of the fan as P0, the calibration parameter of the wind speed sensor 42 as Q0, the power variation coefficient as K1, and the air volume variation coefficient as K2. When the filter assembly is blocked by clumps of garbage, the output power P1 of the fan controlling the suction cylinder 20 is less than P0 due to the reduced air inlet surface. At the same time, the air volume received by the air duct 41 is reduced, and the actual air volume Q1 detected by the wind speed sensor 42 is less than Q0. When P1≤K1*P0 and Q1≤K2*Q0 and this continues for T cycles, the filter flushing pipe 43 backflushes the filter assembly.

[0060] S4; After the blockage on the filter assembly is flushed away, the air inlet surface of the filter assembly returns to normal, the output power of the fan P1 is equal to K1*P0, the actual air volume Q1 is equal to K2*Q0, and the filter flushing pipe 43 stops flushing.

[0061] It is important to note that the coefficients of K1 and K2 are different.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. An automatic flushing device for clogging filters in sanitation vehicles, characterized in that, include: A sanitation vehicle body (10), wherein at least one container for holding garbage is provided inside the sanitation vehicle body (10); At least one suction cylinder (20) is installed inside the sanitation vehicle body (10) with one air inlet pointing to the ground. The air volume inside the suction cylinder (20) is formed by a fan. A filter assembly is provided, in which the garbage sucked in by the suction cylinder (20) is filtered by the filter assembly and falls into the container of the sanitation vehicle body (10); A wind sensing component (40) includes an air duct (41) facing the filter assembly, and a plurality of wind speed sensors (42) disposed at the air outlet of the sanitation vehicle body (10) for detecting the wind force of the filter assembly, and a filter flushing pipe (43) electrically connected to the wind speed sensors (42) and facing the filter assembly, wherein the wind speed sensors (42) detect the amount of air blown from the filter assembly into the air duct (41); The filter assembly includes a first filter plate (31) near the suction cylinder (20) and a second filter plate (32) close to the first filter plate (31) and near the filter flushing pipe (43). The first filter plate (31) and the second filter plate (32) have the same shape and size, and the filter holes of the first filter plate (31) and the second filter plate (32) are aligned with each other. The first filter plate (31) is welded to the sanitation vehicle body (10), and the second filter plate (32) moves relative to the first filter plate (31). The filter assembly also includes a guide rib disposed on the back of the first filter plate (31), one side of the second filter plate (32) slides with the guide rib, and a lateral shift structure (33) is locked on the second filter plate (32). The top of the lateral shift structure (33) is locked on the second filter plate (32). When the lateral shift structure (33) moves up and down, it drives the second filter plate (32) to move relative to the first filter plate (31). When the real-time power of the fan is reduced due to the filter assembly being blocked, and the real-time airflow of the wind speed sensor (42) is reduced, the filter flushing pipe (43) flushes the filter assembly.

2. The automatic flushing device for clogging sanitation vehicle filters according to claim 1, characterized in that, It further includes a flow deflector (50) disposed above the suction cylinder (20), the flow deflector (50) guiding the items sucked in by the suction cylinder (20) to the receiving box.

3. The automatic flushing device for clogging the filter screen of a sanitation vehicle according to claim 1, characterized in that, The lateral shift structure (33) includes a crescent plate (331) welded to the side of the second filter plate (32) away from the guide rib, connecting sleeves (332) screwed to both sides of the crescent plate (331), a docking shaft (333) through which the two connecting sleeves (332) are disposed, and two pushers (334) sleeved on the docking shaft (333).

4. The automatic flushing device for clogging sanitation vehicle filters according to claim 3, characterized in that, A double ring seat (335) is sleeved on the output shaft of the two pushers (334). After one pusher (334) is pushed out, the other pusher (334) is pushed out under the restraint of the double ring seat (335).

5. The automatic flushing device for clogging the filter screen of a sanitation vehicle according to claim 1, characterized in that, It further includes an alignment member (34) disposed on the first filter plate (31), which is pushed out and penetrates the first filter plate (31) and the second filter plate (32) after the second filter plate (32) is moved.

6. The automatic flushing device for clogging the filter screen of a sanitation vehicle according to claim 5, characterized in that, The alignment member (34) includes a power unit (341) locked to the bottom corner of the front of the first filter plate (31), and a connecting part (342) connected to the power unit (341) and passing through the first filter plate (31) and the second filter plate (32) after being pushed out.

7. An automatic flushing device for clogging sanitation vehicle filters according to claim 6, characterized in that, The outer cover of the alignment member (34) is provided with a guide slope (61), the slope of the guide slope (61) points to the middle of the first filter plate (31), and an arch plate (62) is provided in the middle of the first filter plate (31). The wind guided by the guide slope (61) swirls at the position of the arch plate (62).

8. A method of using an automatic flushing device for clogged sanitation vehicle filters, employing the automatic flushing device for clogged sanitation vehicle filters as described in any one of claims 1-7, characterized in that... Includes the following steps: S1; The fan is started at the same time during the movement of the sanitation vehicle. The fan generates suction to suck up the dust and garbage on the ground through the suction tube (20) and hit the guide shroud (50); S2; During the filtration process, light solid impurities are blocked by the filter assembly, while dust and sewage are sucked into the sanitation vehicle body (10) for storage. S3; Define the rated power of the fan as P0, the calibration parameter of the wind speed sensor (42) as Q0, the power variation coefficient as K1, and the air volume variation coefficient as K2. When the filter assembly is blocked by a block of garbage, the output power of the fan controlling the suction cylinder (20) is less than P0 due to the reduced air inlet surface. At the same time, the air volume received by the air duct (41) is reduced, and the actual air volume Q1 detected by the wind speed sensor (42) is less than Q0. When P1≤K1*P0, Q1≤K2*Q0 and lasts for T cycles, the filter flushing pipe (43) backflushes the filter assembly. S4; After the blockage on the filter assembly is flushed away, the air inlet surface of the filter assembly returns to normal, the output power of the fan P1 is equal to K1*P0, the actual air volume Q1 is equal to K2*Q0, and the filter flushing pipe (43) stops flushing.

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