Filter and filter material cleaning method

Abstract

The invention relates to the technical field of filtering equipment, in particular to a filter and a filter material cleaning method. The filter comprises a container, a filter material, a water inlet pipe, an air inlet pipe, a water drainage pipe, an exhaust pipe and a blow-off pipe, the filter material is arranged in the container, the container is divided into an input chamber and an output chamber through the filter material, the water inlet pipe and the air inlet pipe are communicated with the input chamber, and the water outlet pipe and the exhaust pipe are communicated with the input chamber; and the blow-off pipe is communicated with at least one of the input chamber and the output chamber. The filter and the filter material cleaning method have the following advantages that gas is input into the filter, and the filter material is cleaned while vibrating under the buoyancy action of the gas and the explosion action of bubbles, so that the use cost is reduced, the operation is simple, filtering and cleaning can be performed at the same time, and the cleaning effect is improved.

Description

Technical Field

[0001] This invention relates to the field of filtration equipment technology, and in particular to a method for cleaning filters and filter media. Background Technology

[0002] Nowadays, with the improvement of people's living standards, many people like to keep fish at home. After long-term use, the water in the fish tank contains a lot of fish excrement and other waste, polluting the fish's living environment and requiring frequent cleaning. Usually, the fish tank is connected to a filter. The water from the fish tank is fed into the filter through the inlet pipe. The polluted water passes through the filter media, and the waste in the filtered water is adsorbed onto the filter media. The filtered purified water is discharged into the fish tank through the drain pipe, realizing the recycling of water in the fish tank and effectively removing waste from the water. Summary of the Invention

[0003] In view of this, the present invention aims to provide a method for cleaning filters and filter media. By introducing gas into the filter, the filter media vibrates and is cleaned simultaneously due to the buoyancy of the gas and the explosion of the bubbles. This solves the problems of high cost, complicated operation, inability to perform filtration and cleaning at the same time, and poor cleaning effect.

[0004] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0005] A filter includes: a container, filter media, a water inlet pipe, an air inlet pipe, a drain pipe, an exhaust pipe, and a sewage outlet pipe;

[0006] The filter media is disposed inside the container, dividing the container into an input chamber and an output chamber. The water inlet pipe and the air inlet pipe are connected to the input chamber, and the drain pipe and the exhaust pipe are connected to the input chamber.

[0007] The drain pipe is connected to at least one of the input chamber and the output chamber.

[0008] Furthermore, multiple layers of filter media are stacked inside the container, with each layer supported by a mesh partition to form a filtration layer;

[0009] The mesh partition is fixed to the inner wall of the container.

[0010] Furthermore, a preset distance is provided between the top of the filter material of each filter layer and the mesh partition of the filter layer above.

[0011] Furthermore, the container includes an inlet and an outlet, and the water inlet pipe and the air inlet pipe are connected to the inlet via a valve body;

[0012] The drain pipe and the exhaust pipe are connected to the outlet via a valve body.

[0013] Furthermore, an outer shell is fitted over the container, and the water inlet pipe, the air inlet pipe, and the sewage outlet pipe are connected to the outer shell.

[0014] The bottom of the container is connected to the outer shell, and the drain pipe and the exhaust pipe are connected to the upper part of the container.

[0015] Furthermore, both the inlet and outlet are located at the top of the container. The water inlet pipe and the air inlet pipe are inserted into the interior of the container from the inlet, passing through multiple filter layers until reaching the inlet chamber at the bottom of the container.

[0016] Furthermore, the water inlet pipe, the air inlet pipe, and the sewage outlet pipe are connected to the input port at the bottom of the container via a four-way valve;

[0017] The outlet is located at the top of the container, and another drain pipe is connected to the outlet. The drain pipe, the exhaust pipe, and the drain pipe are connected to the outlet via a four-way valve.

[0018] Furthermore, an adjustment device is provided in the input chamber, the adjustment device including a flow divider plate, the flow divider plate being rotatably disposed on the side of the mesh partition facing the input chamber, the flow divider plate including a blocking part and a hollow part.

[0019] Furthermore, the regulating device also includes an injector with an inlet at the bottom and two outlets at the top, the two outlets being arranged opposite each other. The water inlet pipe and the air inlet pipe are connected to the inlet, and the input water and gas are discharged into the input chamber through the outlets.

[0020] A method for cleaning filter media, used for cleaning the filter media of a filter as described in any one of the above claims, the cleaning method comprising:

[0021] S100: Gas is introduced into the input chamber through the intake pipe, and the gas flows through the filter material to the output port and is discharged through the exhaust pipe.

[0022] S200: Water is introduced into the input chamber through the inlet pipe. Inside the container, the water mixes with the gas and rises, passing through the filter media and being discharged through the exhaust pipe. The filtered wastewater is discharged from the drain pipe.

[0023] Compared with existing technologies, the filter and filter media cleaning method of the present invention has the following advantages:

[0024] The advantage of this technical solution is that by introducing gas into the filter, the filter material vibrates and is cleaned simultaneously due to the buoyancy of the gas and the explosion of the bubbles. This reduces the cost of use, simplifies operation, allows filtration and cleaning to be performed at the same time, and improves the cleaning effect. Attached Figure Description

[0025] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0026] Figure 1 This is a schematic diagram of the filter structure of the first embodiment of the present invention;

[0027] Figure 2 This is a schematic diagram of the filter structure of the second embodiment of the present invention;

[0028] Figure 3 This is a schematic diagram of the filter structure according to the third embodiment of the present invention;

[0029] Figure 4 This is a front view of the flow divider according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the filter structure according to the fourth embodiment of the present invention;

[0031] Figure 6 This is a schematic diagram of the filter structure according to the fifth embodiment of the present invention;

[0032] Figure 7 This is a schematic diagram of the filter structure according to the sixth embodiment of the present invention;

[0033] Figure 8 This is a schematic diagram of the filter structure of the seventh embodiment of the present invention;

[0034] Figure 9 This is a schematic diagram of the filter structure of the eighth embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Water inlet pipe, 2-Air inlet pipe, 3-Drain pipe, 4-Exhaust pipe, 5-Upper drain pipe, 5'-Lower drain pipe, 6-Outer shell, 7-Container, 8-Filter media, 9-Mesh baffle, 10-Diverter plate, 11-Ejector, 12-Agitator, 13-Motor, 14-Filter. Detailed Implementation

[0037] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0038] Example 1

[0039] like Figure 1 As shown, a filter, specifically, the filter described in this embodiment, is composed of lightweight filter media with a specific gravity of less than 1 and greater than 0.8.

[0040] The filter includes: a container 7, filter media 8, a water inlet pipe 1, an air inlet pipe 2, a drain pipe 3, an exhaust pipe 4, an upper drain pipe 5, and a lower drain pipe 5'; the filter media 8 is disposed inside the container 7, dividing the container 7 into an input chamber and an output chamber; the water inlet pipe 1, the air inlet pipe 2, and the lower drain pipe 5' are connected to the input chamber and are switched to various states through a switching valve; the drain pipe 3, the exhaust pipe 4, and the upper drain pipe are connected to the output chamber and are switched to various states through a switching valve.

[0041] In filtration mode, water to be filtered is introduced into container 7 through inlet pipe 1. The water to be filtered is filtered through filter media 8 to form clean water, which is then output through drain pipe 3. For example, when used for aquarium water filtration, the aquarium outlet water is introduced into the filter's input chamber through inlet pipe 1. The filtered clean water is then introduced back into the aquarium through the output chamber and drain pipe 3, thus realizing the circulation of water in the aquarium.

[0042] After prolonged use, the filter media 8 becomes saturated with dirt (typically, at this stage, the dirt resembles that found in a sewer or long-used drainpipe, resulting in a very unpleasant odor and a sticky residue; therefore, current technologies use a significantly larger volume of filter media, often exceeding the size of the aquarium itself, to achieve long-term water retention without water changes, although replacement or washing is always necessary). This weakens or even eliminates its filtering effect, requiring replacement of the filter media in existing filters, increasing operating costs. Another solution is to remove and wash the filter media, then reinstall it. While this manual method effectively cleans the media, it is complex and unpleasant. A third method, such as sand filtration, is commonly used in swimming pool water treatment. However, this method requires high-pressure water to wash the quartz sand, and the fine quartz sand particles require additional restraint, necessitating a complex process to ensure that filter media of various diameters are arranged sequentially after washing.

[0043] To achieve online automatic cleaning of filter media, this invention proposes a concept: miniaturization of filters and short-cycle washing, such as weekly washing. This requires a washing method that eliminates hand contact, operates under normal pressure, and uses the boiling of bubbles in water and the resulting turbulence to wash and drain the filter media. Using the method described in this invention, combined with an electromagnetic switching valve and control program, fully automatic cleaning can be achieved, which is difficult to achieve with existing technologies.

[0044] If existing filter media are used, because the filter media has a relatively high specific gravity, under normal pressure, such as the bubble generator of an aerator used in a fish tank, the force of the bubbles is insufficient to make the filter media tumble with the boiling and churning water, thus failing to achieve thorough cleaning of the filter media. At the same time, filter media with a specific gravity greater than 1 are even more difficult to clean using the method described in this invention due to the stacking of the filter media.

[0045] Table 1. Specific gravity range and tumbling state of commonly used filter media in existing technologies.

[0046] name Specific gravity range (g / cm³) Filter media tumbling state under boiling bubbles pumice 0.8-1 severe Activated carbon 0.3-0.6 severe zeolite 2-2.3 Almost unable to roll Maifan stone 0.8-2.7 Almost unable to roll ceramic balls 2.2-2.7 Almost unable to roll Quartz sand (sand filter) 2.5-2.6 Almost unable to roll

[0047] As can be seen from Table 1, commonly used filter media are not suitable for the method described in this invention. Among them, pumice and activated carbon, which have a relatively light specific gravity, will become pulverized after prolonged and vigorous tumbling and washing due to their low strength. Therefore, they are also not suitable for the washing method described in this invention.

[0048] In view of this, the present invention proposes a new concept, namely, when using the washing method described in the present invention, selecting materials with novel structures, as detailed in the experimental results in Table 2.

[0049] Table 2 Experimental parameters of some filter materials used in this invention

[0050]

[0051] *The purification time mentioned refers to the time required for aquarium water with a turbidity of approximately 40 NTU to reach a similar turbidity of 10 NTU when the water is circulated and filtered at a rate of 5 liters per minute, with each container containing approximately 5 liters of filter media.

[0052] Firstly, the commonly used aquarium filter media, such as bio-balls, bio-sponge blocks, and fiber balls, are effective in filtration in existing technologies. However, in the washing method of this invention, due to their rough surfaces and large diameters, they cannot effectively tumble, and therefore their washing effect is almost non-existent.

[0053] The polystyrene balls used in the experiment had too much buoyancy, resulting in excessive friction between the polystyrene balls and between the polystyrene balls and the container wall, making them almost unable to tumble, and therefore their washing effect was almost non-existent.

[0054] The use of tubular plastic filter media is preferred, as the experimental results in the standard indicate that it can provide sufficient strength and the structure is not damaged even during violent tumbling. Since it is not possible to obtain plastics with a continuous specific gravity, the generalization of this invention can only be derived based on the experiments already conducted. The specific gravity of the plastic is 0.85-1.7 g / cm3, and the particle size is between 1-2 mm * 2-3 mm.

[0055] As can be seen from the experimental data in Table 2, polypropylene granules and polyethylene granules are effective in the washing process. However, since the surface is cleaned, the granules do not have residual bacteria inside the tubular structure and require more time to rebuild the effective bacterial community. Therefore, the washing process takes a long time. This verifies that it is necessary to check the residual bacteria inside the tubular granules after washing.

[0056] After the filter media 8 of the present invention reaches saturation, the drain pipe 3 is closed, the exhaust pipe 4 and the upper sewage pipe 5 are opened, and gas is introduced into the container through the air inlet pipe 2. The gas mixed with water generates bubbles. The filter media is tumbled and washed by the action of the tumbling water and the explosion of the bubbles, and the dirt on the filter media 8 falls into the water. The wastewater after washing is discharged through the upper sewage pipe 5 or the lower sewage pipe 5'. When discharging wastewater through the upper sewage pipe 5, it can be achieved by continuously introducing water into the water inlet pipe 1.

[0057] The above process can be repeated to clean the filter media. Then, close all other valves, open inlet pipe 1 and outlet pipe 3, and perform normal water circulation filtration.

[0058] Because the filter media overlaps, and dirt and bacteria have a certain stickiness, the tubular granular filter media of the present invention stick together, making it difficult for air bubbles to break the filter media particles. By setting multiple mesh baffles 9 and placing filter media 8 between or on each mesh baffle 9, air bubbles can more easily cause the filter media 8 to tumble, resulting in a better washing environment.

[0059] Example 2

[0060] The other embodiments are the same, except that the filter material used in this embodiment has a specific gravity greater than 1 and less than 1.8.

[0061] like Figure 1 As shown, since the filter material sinks to the bottom or onto the mesh partition 9, the water inlet and outlet directions of the inlet pipe 1 and the outlet pipe 3 are reversed, that is, the inlet pipe 1 drains water, while the outlet pipe 3 inlets water.

[0062] Example 3

[0063] The principle and structure are largely the same as those of Embodiment 1. The following only describes the differences between Embodiment 3 and Embodiment 1.

[0064] like Figure 3As shown, both the inlet and outlet are located at the top of the container 7. The water inlet pipe 1 and the air inlet pipe 2 are inserted into the interior of the container 7 from the inlet, passing through multiple filter layers until they reach the inlet chamber at the bottom of the container 7.

[0065] The drain pipe 3, the exhaust pipe 4, and the sewage pipe 5 are connected to the outlet via a four-way valve.

[0066] Compared with Embodiment 1 and Embodiment 2, the filter in this embodiment does not have any pipe interface at the bottom, making it easy to place and seal the container.

[0067] Example 4

[0068] The principle and structure are largely the same as those of Embodiments 1, 2 and 3 above. The following only describes the differences between Embodiment 4 and the above embodiments.

[0069] like Figure 5 As shown, an adjustment device is provided in the input chamber, the adjustment device including a flow divider 10, such as... Figure 4 As shown, multiple flow dividers 10 are evenly distributed on the mesh partition 9. The flow dividers 10 can adjust the flow direction of air and water, allowing for the cleaning of different parts of the filter media. Furthermore, the concentrated airflow impacts a portion of the filter media 8, increasing the airflow force and effectively improving the cleaning effect of the filter media 8.

[0070] Furthermore, the regulating device also includes an injector 11, which has an inlet at its lower part and at least one outlet at its upper part. The water inlet pipe 1 and the air inlet pipe 2 are connected to the inlet, and the input water and gas are discharged into the input chamber through the outlet.

[0071] When the ejector 11 has one outlet, the outlet is eccentrically positioned; when it has two or more outlets, the multiple outlets are evenly distributed around the center of the ejector 11. The ejector 11 is rotatably fixed in the input chamber. As the ejector 11 rotates, the direction of water and gas injection can be adjusted, increasing the intensity of water and gas injection. Furthermore, through the rotation of the ejector 11, water and gas, in conjunction with the diverter plate 10, can thoroughly clean the filter media 8, improving the cleaning effect of the filter media 8.

[0072] A method for cleaning filter media, used for cleaning the filter media of a filter according to any one of the above-mentioned methods, the cleaning method comprising:

[0073] S100: Gas is introduced into the input chamber through the intake pipe 2, and the gas flows to the output port through the filter material 8 and is discharged through the exhaust pipe 4.

[0074] S200: Water is introduced into the input chamber through the inlet pipe 1. Inside the container 7, the water and gas mix and rise, pass through the filter material 8, and are discharged through the exhaust pipe 4. The filtered wastewater is discharged from the drain pipe 5.

[0075] Using the above method, the gas introduced into the container 7 causes the filter media 8 to vibrate under the action of buoyancy, shaking off the dirt adsorbed on the filter media 8. The filter media 8 is then flushed with water, and the dirt is carried away and discharged from the drain pipe 5.

[0076] After water is introduced into the container, the gas mixes with the water, generating bubbles in the water. The explosion of these bubbles enhances the vibration of the filter media 8, improving the effect of shaking off dirt.

[0077] As is known to those skilled in the art, the bubbles generated by a gas mixed with water have the strongest explosive force at the water surface. Therefore, it is preferable to control the water input rate so that the water rises slowly, allowing the bubbles exploding on the water surface to fully vibrate the filter media of each filter layer, thereby improving the cleaning effect.

[0078] Because the washing process and aquarium oxygenation share the same air pump, the flow rate and pressure of the water entering the filter are much greater than the flow rate and pressure of the water and gas output from the air pump. Therefore, an adjustment device is installed to balance the localized cleaning process using the lower flow rate and pressure of the gas.

[0079] Example 5

[0080] like Figure 6 As shown, the specific gravity of the filter media 8 is between 0.8 and 1, and the water inlet direction is the same as the buoyancy direction of the filter media 8. A filter 14 is provided above the container, and the filter 14 is preferably a mesh plate.

[0081] The cleaning method includes: closing the water inlet pipe 1 and the drain pipe 3, opening the air inlet pipe 2 and the exhaust pipe 4, and introducing gas into the container 7 below the filter media 8 using an air pump. The filter media 8 is cleaned in the container 7 by boiling under the action of the gas. Then, the wastewater is discharged through the water inlet or directly. After the wastewater is discharged, clean water is introduced through the water inlet pipe 1 to clean the container 7. This cleaning process is repeated multiple times until the water used for cleaning is clean.

[0082] During the experiment, the researchers of this invention discovered that the filter material 8 needs a certain amount of rotation space in the container 7. The rotation space should be a space above the filter material 8 suspended in the container 7 when the gas is introduced, which pushes the water in the upper layer of the container 7 out of the container 7 through the exhaust pipe 4 or a separately set sewage pipe. There is also a space below the filter material 8. The filter material must have these two spaces when it is tumbling violently.

[0083] When the specific gravity of the filter media is less than the above range, after the above space is formed, a part of the filter media 8 will be pushed out of the water surface by buoyancy. Therefore, the filter media cannot be effectively tumbled and washed.

[0084] As an example, a drain pipe 5 is provided on the container, through which wastewater after filtration and cleaning of the filter media is discharged.

[0085] In experiments, the inventors of this invention also discovered that the surface roughness, shape, and ratio of the maximum diameter of the filter media to the diameter of the container all have a significant impact on washing.

[0086] Example 6

[0087] like Figure 7 As shown, the specific gravity of the filter media 8 is between 1 and 1.3, and the filter media 8 sinks to the bottom of the water. The water inlet direction is opposite to the buoyancy direction of the filter media 8.

[0088] The cleaning method includes: closing the water inlet pipe 1 and the drain pipe 3, opening the air inlet pipe 2 and the exhaust pipe 4, and using an air pump to introduce gas into the container 7 below the filter media 8, creating two spaces above the filter media 8: one above the water and the other containing water. The filter media 8 is cleaned in the container 7 by boiling under the action of the gas. Then, the wastewater is drained through the water inlet or directly. After draining, clean water is introduced through the water inlet pipe 1 to clean the container 7. This cleaning process is repeated multiple times until the water used for cleaning is clean.

[0089] Example 7

[0090] like Figure 8 As shown, a water inlet pipe 1 is provided at the lower part of container 7, a drain pipe 3 is provided at the upper part of container 7, and a stirrer 12 is provided at the bottom of container 7. The specific gravity of the filter material 8 is between 0.8 and 1.3.

[0091] In this city example, filter media 8 with a specific gravity between 0.8 and 1 will be used as an example for explanation. The cleaning method for filter media with a specific gravity between 1 and 1.3 is roughly the same. The only difference is that during the cleaning process, filter media 8 is submerged to the bottom of the water.

[0092] The cleaning method includes: opening the inlet pipe 1 and the drain pipe 3, introducing clean water, and then the filter media 8 floating on top of the water. Starting the agitator 12, the filter media 8 is cleaned in the container 7 by boiling under the agitation. Then, the wastewater is discharged through the inlet pipe or directly. After the wastewater is discharged, clean water is introduced through the inlet pipe 1 to clean the container 7. This cleaning process is repeated multiple times until the water used for cleaning is clean.

[0093] In this embodiment, the difference from the above embodiments is that the filter material 8 is tumbled by stirring water to achieve the purpose of cleaning, instead of using gas to achieve tumbling and cleaning of the filter material 8 in the above embodiments.

[0094] Example 8 Figure 9 As shown, the difference from Embodiment 7 is that an outer shell 6 is provided outside the container 7, and a motor 13 is provided inside the outer shell 6. The container 7 is rotatably connected to the outer shell 6 by the motor 13.

[0095] The specific gravity of the filter material 8 is between 0.8 and 1.3.

[0096] In this city example, filter media 8 with a specific gravity between 0.8 and 1 will be used as an example for explanation. The cleaning method for filter media with a specific gravity between 1 and 1.3 is roughly the same. The only difference is that during the cleaning process, filter media 8 is submerged to the bottom of the water.

[0097] The cleaning method includes: opening the inlet pipe 1 and the drain pipe 3, introducing clean water, and then the filter media 8 floating on top of the water. Starting the agitator 12, the filter media 8 is cleaned in the container 7 by boiling under the agitation. After cleaning, the container 7 is rotated by the motor 13 to discharge the wastewater. After the wastewater is discharged, clean water is introduced through the inlet pipe 1 to clean the container 7. This cleaning process is repeated multiple times until the water is clean.

[0098] Preferably, an air inlet pipe 2 is provided at the bottom of the container 7. During cleaning, while the agitator 12 is stirring, gas is introduced through the air inlet pipe 2 to further increase the degree of tumbling of the filter material 8 and improve the cleaning effect.

[0099] An exhaust pipe is also provided on the container 7. Preferably, both the container 7 and the outer shell 6 are cylindrical structures with an upper opening, which can be used to discharge gas instead of an exhaust pipe.

[0100] During the experiment, the inventors of this invention discovered that the filter material 8 needs a certain amount of rotation space in the container 7. The rotation space should be formed above the filter material 8 in the container 7 after the gas is introduced and the gas pushes the water on the upper layer of the container 7 out of the container 7 through the exhaust pipe 4 or a separately set drain pipe. One space is formed after a part of the water in the container 7 is pushed out by the gas, and the other space is formed in the water without the filter material. The filter material must have these two spaces when it is tumbling violently.

[0101] When the specific gravity of the filter media exceeds the above range, it is difficult to achieve the boiling and tumbling required for washing even if the gas input is increased.

[0102] In experiments, the inventors of this invention also discovered that the surface roughness, shape, and ratio of the maximum diameter of the filter media to the diameter of the container all have a significant impact on washing.

[0103] In the above embodiments five and six, when the specific gravity is close to 1, slight changes in water flow will agitate the filter material 8, causing the adsorbed dirt to return to the water, resulting in filtration difficulties.

[0104] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the following claims.

[0105] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

Claims

1. A method of cleaning a filter medium of a filter, characterized by, The filter comprises a container, filter material, water inlet pipe, air inlet pipe, water outlet pipe, air outlet pipe and sewage pipe; During washing, the water inlet pipe is closed, the air inlet pipe, the air outlet pipe and the sewage pipe are opened, the bubbles burst during rising and make the water in the container tumble, which causes the filter material in the water to tumble violently, so that the dirt on the surface of the filter material falls off and is discharged through the sewage pipe.

2. The cleaning method according to claim 1, characterized by, The filter material is arranged inside the container, and the container is divided into an input chamber and an output chamber by the filter material; When the specific gravity of the filter material is less than 1, the water inlet pipe and the air inlet pipe communicate with the input chamber, and the water outlet pipe and the air outlet pipe communicate with the input chamber; When the specific gravity of the filter material is greater than 1, the functions of the water inlet pipe and the water outlet pipe are reversed, that is, the water inlet pipe discharges water, and the water outlet pipe takes in water, and respectively communicates with the reversed input chamber and the output chamber; The sewage pipe communicates with at least one of the input chamber and the output chamber.

3. The cleaning method according to claim 1, wherein A plurality of mesh partitions are arranged in layers inside the container.

4. The cleaning method according to claim 1 or 2, characterized by, A preset distance is provided between the upper part of the filter material of each filter layer and the mesh partition of the previous layer.

5. The cleaning method according to claim 1, wherein, Each input and output end is switched by a switching valve.

6. The cleaning method according to claim 1 or 2, characterized by, The filter material is a plastic tubular particle with a specific gravity of 0.8-1.8 and a particle size of 1-2mm to 2-3mm.

7. The cleaning method of claim 6, characterized in that The plastic tubular particle is selected from one or more of polypropylene, polyethylene, PVDF filter membrane silica gel and polyvinyl chloride.

8. The cleaning method according to claim 7 or 2, characterized by The plastic tubular mixed particles should be selected to have a specific gravity less than 1 or greater than 1, so as to determine the water inlet and outlet directions.

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