Device for back flushing filter element through control valve

Abstract

The utility model discloses a device for back flushing a filter element through a control valve, which comprises a fan, a plurality of pipelines, a plurality of valves, a filter chamber and a silencing air outlet pipe, the fan is fixedly connected with the plurality of pipelines, the plurality of valves are connected with the plurality of pipelines, and the silencing air outlet pipe is connected with the filter chamber. The filter chamber is arranged at the lower left ends of the multiple pipelines and fixedly connected with the multiple pipelines, the silencing air outlet pipe is connected with the pipelines through the valves, when the fan works, air enters from the dust suction opening under the suction effect of the fan, passes through the interior of the filter chamber and flows to the multiple pipelines, and the air is exhausted from the air outlet pipe through the valves. Under the action that the plurality of valves control the flow direction of gas, the gas flows back to the plurality of pipelines and finally returns to the filter chamber under the action that the plurality of valves control the flow direction of the gas before the gas reaches the silencing air outlet pipe, and back flushing is realized on the upper filter element or the lower filter element in the filter chamber, so that cleaning of the filter elements is realized; the problems that in the prior art, in the using process of an existing dust collector, due to blockage of a filter element, the dust collector needs to be frequently closed, the filter element is taken out for manual cleaning, the working efficiency is low, and the operation burden of a user is increased are solved.

Description

Technical Field

[0001] The utility model relates to a device for backwashing a filter element by controlling a valve, in particular to a device for backwashing a filter element by controlling a valve for a vacuum cleaner. Background Art

[0002] During the long-term use of traditional vacuum cleaners, the filter element will gradually become blocked, affecting the dust suction effect and performance of the vacuum cleaner. To maintain the normal working state of the vacuum cleaner, users need to frequently turn off the vacuum cleaner and manually remove the filter element for cleaning, which not only increases the workload of users, but also affects the continuous working time and working efficiency of the vacuum cleaner. Summary of the Utility Model

[0003] The utility model aims to provide a device for backwashing a filter element by controlling a valve. By adjusting the opening and closing state of the valve in the pipeline, the gas flow direction is controlled, so that the gas backwashes the filter element, thereby realizing the cleaning of the filter element, and solving the problems of low working efficiency and increased user operation burden existing in the prior art that the existing vacuum cleaner needs to be frequently turned off for manual cleaning due to the blockage of the filter element during use.

[0004] The technical solution of the utility model is as follows: A device for backwashing a filter element by controlling a valve includes a blower, a plurality of pipelines, a plurality of valves, a filtration chamber and a silencing air outlet pipe; the blower includes an air inlet and an air outlet; the blower is fixedly connected to the plurality of pipelines, and the plurality of pipelines are fixedly connected through the plurality of valves; the plurality of pipelines include a first pipeline, a second pipeline, a third pipeline, a fourth pipeline and a fifth pipeline; the plurality of valves include a first valve, a second valve, a third valve, a fourth valve and a fifth valve; the filtration chamber is disposed at the lower left end of the plurality of pipelines and is fixedly connected to the plurality of pipelines; the filtration chamber includes a dust suction port, an upper filter element and a lower filter element.

[0005] Optionally, the air inlet is located on the left side of the blower, and the air outlet is located on the right side of the blower.

[0006] Optionally, the first pipe is U-shaped with an opening facing downwards. Its left end penetrates through the upper filter element, the lower filter element and is connected to the filtration chamber. Its right end is a three-way pipe, which is connected to the fourth pipe and the fifth pipe through the multiple valves; the second pipe is U-shaped with an opening facing downwards and is located below the first pipe. Its left end is directly connected to the upper filter element, and its right end is connected to the fourth pipe through the valve; the third pipe is L-shaped, and its two ends are respectively connected to the second pipe and the fifth pipe through the valves; the fourth pipe is located below the second pipe and is a three-way pipe. Two of its openings are connected to the first pipe and the second pipe through the valves, and the other opening is connected to the air inlet; the fifth pipe is located below the silencing air outlet and is two three-way pipes, one above the other. Three of its openings are respectively connected to the first pipe, the third pipe and the silencing air outlet pipe through the multiple valves, and the other end opening is connected to the air outlet.

[0007] Optionally, the first valve is located between the second pipe and the fourth pipe and connects the second pipe and the fourth pipe; the second valve is located between the fourth pipe and the first pipe and connects the fourth pipe and the first pipe; the third valve is located between the first pipe and the fifth pipe and connects the first pipe and the fifth pipe; the fourth valve is located between the silencing air outlet pipe and the fifth pipe and connects the silencing air outlet pipe and the fifth pipe; the fifth valve is located between the third pipe and the fifth pipe and connects the third pipe and the fifth pipe.

[0008] Optionally, the first valve, the second valve, the third valve, the fourth valve and the fifth valve each include a valve body, a valve plate, a pull rod and a pressure actuator; the valve body is a hollow tubular object and is connected to the outside of the pipe; there are two pull rods in an "L" shape. One penetrates through the valve body, and the other penetrates through the pressure actuator; the valve plate is a circular sheet object and is fixedly installed inside the valve body through the penetration of the pull rod.

[0009] Optionally, the valve plate is movably connected to the pull rod and can rotate around the pull rod.

[0010] Optionally, the filtration chamber is a hollow cube; the dust suction port is a tubular protrusion on the left side outside the filtration chamber.

[0011] Optionally, the upper filter element includes an upper filter mesh, and the lower filter element includes a lower filter mesh; both the upper filter element and the lower filter element are hollow cylinders. The outer peripheral surface of the upper filter element is the upper filter mesh, and the outer peripheral surface of the lower filter element is the lower filter mesh.

[0012] Optionally, the lower filter element is located below the upper filter element.

[0013] Optionally, the third pipe and the fourth pipe have no connection relationship and are two independent pipes.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] A device for backwashing a filter element by controlling a valve provided by the present utility model, when the fan is working, by adjusting the opening and closing states of a plurality of valves to control the gas flow direction, so that after the filter element sucks dust and filters garbage, the gas is sucked in again and flows back to the filter chamber to backwash the upper filter element or the lower filter element inside the filter chamber, thereby realizing the cleaning of the filter element, and solving the problems of low working efficiency and increased user operation burden existing in the prior art that the existing vacuum cleaner needs to be frequently turned off to take out the filter element for manual cleaning due to the blockage of the filter element during use. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the present utility model;

[0017] Figure 2 (1) is an enlarged schematic diagram of the valve closed state;

[0018] Figure 2 (2) is an enlarged schematic diagram of the valve open state;

[0019] Figure 3 is a schematic diagram of the state of the present utility model during dust suction;

[0020] Figure 4 is a schematic diagram of the state of the present utility model when backwashing the upper filter element;

[0021] Figure 5 is a schematic diagram of the state of the present utility model when backwashing the lower filter element.

[0022] Wherein: 1 - fan; 11 - air inlet; 12 - air outlet; 2 - a plurality of pipes; 21 - first pipe; 22 - second pipe; 23 - third pipe; 24 - fourth pipe; 25 - fifth pipe; 3 - a plurality of valves; 31 - first valve; 311 - valve plate; 312 - valve body; 313 - pull rod; 314 - pressure actuator; 32 - second valve; 33 - third valve; 34 - fourth valve; 35 - fifth valve; 4 - filter chamber; 41 - dust suction port; 42 - upper filter element; 421 - upper filter screen; 43 - lower filter element; 431 - lower filter screen; 5 - silencing air outlet pipe. Detailed Embodiments

[0023] To make the objectives, technical solutions, and advantages of the present utility model clearer, the following will describe the embodiments of the present utility model in detail with reference to the drawings.

[0024] Refer to Figure 1, A device for backwashing a filter element by controlling a valve, comprising a blower 1, a plurality of pipes 2, a plurality of valves 3, a filtration chamber 4 and a silencing outlet duct 5;

[0025] The blower 1 is fixedly connected to the plurality of pipes 2, the plurality of pipes 2 are fixedly connected to each other through the plurality of valves 3, the filtration chamber 4 is placed at the lower left ends of the two pipes 2 and is fixedly connected to the two pipes 2, and the silencing outlet duct 5 is connected to the pipe 2 through the valve 3;

[0026] The blower 1 includes an air inlet 11 and an air outlet 12;

[0027] The plurality of pipes 2 include a first pipe 21, a second pipe 22, a third pipe 23, a fourth pipe 24 and a fifth pipe 25;

[0028] The plurality of valves 3 include a first valve 31, a second valve 32, a third valve 33, a fourth valve 34 and a fifth valve 35;

[0029] The filtration chamber 4 includes a dust suction port 41, an upper filter element 42 and a lower filter element 43;

[0030] The upper filter element 42 includes an upper filter mesh 421, and the lower filter element 43 includes a lower filter mesh 431;

[0031] The silencing outlet duct 5 is connected to the fifth pipe 25 through the fourth valve 34;

[0032] The air inlet 11 is located on the left side of the blower 1, the air outlet 12 is located on the right side of the blower 1, and the blower 1 sucks air from the air inlet 11 and discharges air from the air outlet 12;

[0033] The first pipe 21 is U-shaped with an opening downward. Its left end penetrates through the upper filter element 42 and extends into the lower filter element 43 and is fixedly connected to the filtration chamber 4. Its right end is a tee pipe with three openings, namely an upward opening, a leftward opening and a rightward opening. The leftward opening at the right end of the first pipe 21 is fixedly connected to one end of the second valve 32, and the rightward opening at the right end of the first pipe 21 is fixedly connected to one end of the third valve 33;

[0034] The second pipe 22 is U-shaped with an opening downward and is located below the first pipe 21. Its left end extends into the upper filter element 42 and is fixedly connected thereto, and its right end is fixedly connected to one end of the first valve 31;

[0035] The third pipe 23 is L-shaped. Its upper port is communicated with the second pipe 22, and its lower port is fixedly connected to one end of the fifth valve 35;

[0036] The fourth pipe 24 is located at the lower end of the first valve 31. The fourth pipe 24 is a tee pipe with three openings, namely an upward opening, a downward opening, and a rightward opening. The upward opening of the fourth pipe 24 is fixedly connected to the other end of the first valve 31. The rightward opening of the fourth pipe 24 is fixedly connected to the other end of the second valve 32. The downward opening of the fourth pipe 24 is fixedly connected to the air inlet 11.

[0037] The fifth pipe 25 is located below the silencing air outlet pipe 5. The upper end of the fifth pipe 25 is a tee pipe with three openings, namely an upward opening, a leftward opening, and a downward opening. The upward opening at the upper end of the fifth pipe 25 is fixedly connected to one end of the fourth valve 34. The leftward opening at the upper end of the fifth pipe 25 is fixedly connected to the other end of the third valve 33. The lower end of the fifth pipe 25 is also a tee pipe with three openings, namely an upward opening, a leftward opening, and a downward opening. The upward opening at the lower end of the fifth pipe 25 and the downward opening at the upper end of the fifth pipe 25 are connected by a through pipe. The leftward opening at the lower end of the fifth pipe 25 is fixedly connected to the other end of the fifth valve 35. The downward opening at the lower end of the fifth pipe 25 is fixedly connected to the air outlet 12.

[0038] The first valve 31 is located between the right end of the second pipe 22 and the upward opening at the upper end of the fourth pipe 24, connecting the second pipe 22 and the fourth pipe 24.

[0039] The second valve 32 is located between the rightward opening at the upper end of the fourth pipe 24 and the leftward opening at the right end of the first pipe 21, connecting the fourth pipe 24 and the first pipe 21.

[0040] The third valve 33 is located between the rightward opening at the right end of the first pipe 21 and the leftward opening at the upper end of the fifth pipe 25, connecting the first pipe 21 and the fifth pipe 25.

[0041] The fourth valve 34 is located between the silencing air outlet pipe 5 and the upward opening at the upper end of the fifth pipe 25, connecting the silencing air outlet pipe 5 and the fifth pipe 25.

[0042] The fifth valve 35 is located between the lower end of the third pipe 23 and the leftward opening at the lower end of the fifth pipe 25, connecting the third pipe 23 and the fifth pipe 25.

[0043] The filter chamber 4 is square and internally contains the upper filter element 42 and the lower filter element 43. The dust suction port 41 is a tubular protrusion at the lower left position of the filter chamber 4.

[0044] Both the upper filter element 42 and the lower filter element 43 are hollow cylinders. The bottoms of the upper filter element 42 and the lower filter element 43 are made of airtight sealing materials, so gas cannot communicate between the two filter elements 42 and 43. The outer peripheral surface of the upper filter element 42 is a breathable material capable of filtering dust and other impurities, namely the upper filter screen 421 (including but not limited to polyester fiber, polypropylene fiber, glass fiber, etc.). The outer periphery of the lower filter element 43 is a breathable material capable of filtering dust and other impurities, namely the lower filter screen 431 (including but not limited to polyester fiber, polypropylene fiber, glass fiber, etc.). The lower filter element 43 is located below the upper filter element 42;

[0045] There is no connection relationship between the third pipeline 23 and the fourth pipeline 24, and they are two independent pipelines.

[0046] Refer to Figure 1 and Figure 2 , for the device of backwashing the filter element by controlling the valve, the multiple valves 3 all include a valve plate 311, a valve body 312, a pull rod 313 and a pressure actuator 314; the valve body 312 is a hollow tube. The valve plate 311 is circular and placed inside the hollow tube of the valve body 312. The multiple valves 3 are fixedly connected to the multiple pipelines 2 through the valve body 312. There are two pull rods 313, in an "L" shape. One penetrates the valve plate 311 inside the valve body 312 and is located at the central axis position of the valve plate 311, and the other penetrates the pressure actuator 314. The valve plate 311 can rotate around the pull rod 313. When the valve plate 311 rotates to be parallel to the end face of the valve body 312, as Figure 2 (1) the multiple valves 3 are in a closed state; when the valve plate 311 rotates to be perpendicular to the end face of the valve body 312, as Figure 2 (2) the multiple valves 3 are in an open state. The control method for opening or closing the multiple valves 3 can be manual operation or microcomputer automatic control.

[0047] When starting to work, the operator of the vacuum cleaner starts the vacuum cleaner, and the fan 1 starts to suck dust. The dust-containing gas is inhaled into the filter chamber 4 and blown from the outside to the inside towards the upper filter element 42 and the lower filter element 43. Thus, dust and garbage are retained on the surfaces of the upper filter screen 421 and the lower filter screen 431, and the gas continues to flow towards the plurality of pipes 2. By manually operating or automatically controlling the opening and closing of the plurality of valves 3 by a microcomputer, the gas is discharged through the opened plurality of valves 3 via the silencing air outlet pipe 5. When cleaning the filter element, by controlling the opening and closing of the plurality of valves 3, the gas without garbage flows back to the plurality of pipes 2 through the opened plurality of valves 3, and finally flows back into the interior of the upper filter element 42 or the lower filter element 43 to realize back blowing, blowing the dust and garbage retained on the filter element to the bottom of the filter chamber. Then, the dropped dust can be manually processed, thereby realizing the cleaning of the vacuum cleaner filter element. Specifically, the device for back blowing the filter element by controlling the valve of the present utility model has the following three working states:

[0048] Referring to Figure 1 and Figure 3 , in the dust suction state of the device for back blowing the filter element by controlling the valve, by controlling the opening and closing of the plurality of valves 3, the third valve 33 and the fifth valve 35 are both in the closed state, and the first valve 31, the second valve 32, and the fourth valve 34 are all in the opened state. When the fan 1 is turned on, the gas containing dust and other garbage in the outside world is sucked by the suction force of the fan 1, enters the filter chamber 4 through the suction port 41, and blows the upper filter element 42 and the lower filter element 43 inside the filter chamber 4 from the outside to the inside. Since the bottom of the lower filter element 43 and the upper filter element 42 is sealed, and the upper filter screen 421 and the lower filter screen 431 are filter-permeable materials, they can effectively intercept and capture the dust particles and garbage in the inhaled dust-containing gas. The cleaned gas then continues to flow upward and enters the first pipe 21 and the second pipe 22. Because the first valve 31 is in the opened state at this time, the gas enters the fourth pipe 24 via the second pipe 22; and because the second valve 32 is in the opened state and the third valve 33 is in the closed state, the gas enters the fourth pipe 24 via the first pipe 21. After converging with the gas entering the fourth pipe 24 via the second pipe 22, it enters the fan 1 through the air inlet 11, and then is discharged from the air outlet 12 into the fifth pipe 25; at this time, the third valve 33 is closed and the fourth valve 34 is opened, and the gas is guided from the fifth pipe 25 to the silencing air outlet pipe 5, and finally the air is discharged to the outside. Thus, as the dust suction process continues, dust and garbage will gradually accumulate on the outer peripheries of the upper filter screen 421 and the lower filter screen 431, affecting their filtration efficiency and the overall performance of the vacuum cleaner.

[0049] Referring to Figure 1 and Figure 4, when backwashing the upper filter element by means of the device for backwashing the filter element by controlling valves, by controlling the closing of the multiple valves 3, the first valve 31, the third valve 33 and the fourth valve 34 are all in the closed state, and the second valve 32 and the fifth valve 35 are both in the open state. The gas enters the filtration chamber 4 under the suction of the fan 1. Since the fan 1 in this embodiment sucks in the gas from the left and discharges it to the right and the first valve 31 is closed, the gas cannot be sucked into the second pipeline 22 through the upper filter element 42, but is sucked into the first pipeline 21 through the lower filter element 43. Since the first valve 31 is in the closed state, the second valve 32 is in the open state, and the third valve 33 is in the closed state, the gas enters the fourth pipeline 24 through the first pipeline 21, then enters the fan 1 from the air inlet 12, and is discharged from the air outlet 12 and enters the fifth pipeline 25. At this time, the third valve 33 and the fourth valve 34 are both in the closed state, and the fifth valve 35 is in the open state. Therefore, the gas enters the third pipeline 23 from the fifth pipeline 25, reaches the second pipeline 22, and finally enters the upper filter element 42, and backwashes the upper filter screen 421 from the inside to the outside. The strong air flow blows the dust particles or garbage attached to the outer periphery of the upper filter screen 421 outwards and drops to the bottom of the filtration chamber 4, and is discharged to the outside of the vacuum cleaner after manual treatment, so as to realize backwashing and cleaning of the upper filter element 42.

[0050] Refer to Figure 1 and Figure 5 , when backwashing the lower filter element by means of the device for backwashing the filter element by controlling valves, by controlling the closing of the multiple valves 3, the first valve 31 and the third valve 33 are both in the open state, and the second valve 32, the fourth valve 34 and the fifth valve 35 are all in the closed state. The gas passes through the filtration chamber 4 under the suction of the fan 1. Since the fan 1 in this embodiment sucks in the gas from the left and discharges it to the right and the second valve 32 is closed, the gas cannot be sucked into the first pipeline 21 through the lower filter element 43, but is sucked into the second pipeline 22 through the upper filter element 42. Since the first valve 31 is in the open state and the second valve 32 is closed, the gas enters the fourth pipeline 24 through the second pipeline 22. Then the gas enters the fan 1 from the air inlet 12 and is discharged from the air outlet 12 and enters the fifth pipeline 25. Since the third valve 33 is open and the fourth valve 34, the fifth valve 35 and the second valve 32 are closed, the gas is introduced into the first pipeline 21 from the fifth pipeline 25, enters the lower filter element 43, and backwashes the lower filter screen 431 from the inside to the outside. The strong air flow blows the dust particles attached to the outer periphery of the lower filter screen 431 outwards and drops to the bottom of the filtration chamber 4, and is discharged to the outside of the vacuum cleaner after manual treatment, so as to realize backwashing and cleaning of the lower filter element 43.

[0051] As described above, the device for controlling the valve to backflush the filter element of the present utility model blows the dust and garbage continuously accumulated on the outer peripheries of the upper filter screen 421 and the lower filter screen 431 during the normal dust suction process from the inside to the outside and reversely blows them to the bottom of the filtering chamber 4, and then manually transports them to the outside. This solves the problems in the background technology that in the process of using the existing vacuum cleaner, due to the blockage of the filter element, it is necessary to frequently turn off the vacuum cleaner to take out the filter element for manual cleaning, resulting in low work efficiency and increased operation burden on the user.

[0052] It should be noted that in this text, relative terms such as first and second, primary and secondary, etc., and positional terms such as "upper end", "lower end", "left end", "right end", "left side", "right side", etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order or that the positions cannot be changed or swapped. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device.

[0053] The above description is only a preferred embodiment of the present utility model and is not intended to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model are included within the protection scope of the present utility model.

Claims

1. A device for backwashing a filter element by controlling a valve, characterized in that: It includes a fan, multiple pipelines, multiple valves, a filtration chamber, and a silencing outlet air duct; The fan includes an air inlet and an air outlet; The fan is fixedly connected to the multiple pipelines, and the multiple pipelines are fixedly connected through the multiple valves; The multiple pipelines include a first pipeline, a second pipeline, a third pipeline, a fourth pipeline, and a fifth pipeline; The multiple valves include a first valve, a second valve, a third valve, a fourth valve, and a fifth valve; The filtration chamber is placed at the lower left end of the multiple pipelines and is fixedly connected to the multiple pipelines; The filtration chamber includes a dust suction port, an upper filter element, and a lower filter element; The silencing outlet air duct is connected to the pipeline through the valve.

2. The device for backwashing a filter element by controlling a valve according to claim 1, characterized in that: The air inlet is located on the left side of the fan, and the air outlet is located on the right side of the fan.

3. The device for backwashing a filter element by controlling a valve according to claim 1 or 2, characterized in that: The first pipeline is U-shaped with an opening downward. Its left end penetrates through the upper filter element and the lower filter element and is connected to the filtration chamber. Its right end is a three-way pipe and is connected to the fourth pipeline and the fifth pipeline through the multiple valves; The second pipeline is U-shaped with an opening downward and is located below the first pipeline. Its left end is directly connected to the upper filter element, and its right end is connected to the fourth pipeline through the valve; The third pipeline is L-shaped, and its two ends are respectively connected to the second pipeline and the fifth pipeline through the valve; The fourth pipeline is located below the second pipeline and is a three-way pipe. Two of its openings are connected to the first pipeline and the second pipeline through the valve, and the other opening is connected to the air inlet; The fifth pipeline is located below the silencing air outlet and is two three-way pipes, one above the other. Three of its openings are respectively connected to the first pipeline, the third pipeline, and the silencing outlet air duct through the multiple valves, and the other end opening is connected to the air outlet.

4. The device for backwashing a filter element by controlling a valve according to claim 3, characterized in that: The first valve is located between the second pipeline and the fourth pipeline and connects the second pipeline and the fourth pipeline; The second valve is located between the fourth pipeline and the first pipeline and connects the fourth pipeline and the first pipeline; The third valve is located between the first pipeline and the fifth pipeline and connects the first pipeline and the fifth pipeline; The fourth valve is located between the silencing outlet air duct and the fifth pipeline and connects the silencing outlet air duct and the fifth pipeline; The fifth valve is located between the third pipeline and the fifth pipeline and connects the third pipeline and the fifth pipeline.

5. The device for backwashing a filter element by controlling a valve according to claim 1 or 2, characterized in that: The first valve, the second valve, the third valve, the fourth valve, and the fifth valve all include a valve body, a valve plate, a pull rod, and a pressure actuator; The valve body is a hollow tubular object and is connected to the outside of the pipeline; There are two pull rods, which are in an "L" shape. One passes through the valve body, and the other passes through the pressure actuator; The valve plate is a circular sheet-like object and is fixedly installed inside the valve body through the penetration of the pull rod.

6. The device for backwashing the filter element by controlling the valve according to claim 5, wherein: The valve plate is movably connected to the pull rod and can rotate around the pull rod.

7. The device for backwashing the filter element by controlling the valve according to claim 1 or 2, wherein: The filtration chamber is a hollow cube; The dust suction port is a tubular protruding part on the left side outside the filtration chamber.

8. The device for backwashing the filter element by controlling the valve according to claim 1 or 2, wherein: The upper filter element includes an upper filter screen, and the lower filter element includes a lower filter screen; Both the upper filter element and the lower filter element are hollow cylinders. The outer peripheral surface of the upper filter element is the upper filter screen, and the outer peripheral surface of the lower filter element is the lower filter screen.

9. The device for backwashing the filter element by controlling the valve according to claim 8, wherein: The lower filter element is located below the upper filter element.

10. The device for backwashing the filter element by controlling the valve according to claim 1 or 2, wherein: The third pipe and the fourth pipe have no connection relationship and are two independent pipes.

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