A filter cartridge cleaning apparatus

Abstract

The utility model relates to filter core cleaning equipment technical field, especially a kind of filter core cleaning equipment.A kind of filter core cleaning equipment includes rack, first aperture plate, water inlet pipe, air pipe and air blowing device, water tank is provided in rack, first aperture plate is horizontally installed in water tank, first aperture plate is provided with first through-hole, and first through-hole is used to wear and install fixed filter core;Rack is provided with first perforation, second perforation and overflow port, the other end of water inlet pipe passes through first perforation and is inserted into the bottom of water tank, and the other end of water inlet pipe is provided with multiple water jet openings with opening upwards;One end of air pipe is connected with the air outlet of air blowing device, and the other end of air pipe passes through second perforation and is inserted into the bottom of water tank, and air blowing device can pass compressed gas from outside into the bottom of water tank through air pipe;Overflow port is located above the top opening of filter core.The filter core cleaning equipment can continuously clean filter core in dynamic "water inflow-air agitation-overflow sewage" mode, and can ensure the cleaning effect of filter core.

Description

Technical Field

[0001] This utility model relates to the technical field of filter element cleaning equipment, and in particular to a filter element cleaning device. Background Technology

[0002] In circuit board production lines, filter elements are the core components of chemical solution (such as etching solution and developing solution) treatment systems. They purify and control the chemical solutions through physical interception and adsorption, ensuring the yield rate and process stability of circuit boards.

[0003] New filter cartridges may contain residual dust particles, chemical fibers, or other chemical impurities (such as silicone oil and release agents) from the manufacturing and packaging process. Therefore, if the filter cartridge is installed and used directly without cleaning, there is a risk of contaminating the chemical solution. The residual chemical impurities in the filter cartridge may react with some of the chemical solution, disrupting the chemical balance of the solution. Chemical impurities can also increase the number of microparticles in the chemical solution, which may stick to the surface of the board during the electroless plating process, forming defects such as pits / plating nodules and reducing product yield.

[0004] It is evident that a cleaning device is needed to remove residual impurities from new filter elements. Summary of the Invention

[0005] This invention provides a filter element cleaning device that can clean residual impurities on new filter elements.

[0006] To address the aforementioned problems, this utility model provides a filter cartridge cleaning device for cleaning tubular filter cartridges. It includes a frame, a first perforated plate, a water inlet pipe, an air blowing pipe, and an air blowing device. The frame contains a water tank, and the first perforated plate is horizontally installed within the water tank. The first perforated plate has a first through hole extending along its thickness direction, which is used to insert and fix the filter cartridge. The frame is provided with a first through hole, a second through hole and an overflow port communicating with the water tank. One end of the water inlet pipe is adapted to be connected to a water source, and the other end of the water inlet pipe passes through the first through hole and extends into the bottom of the water tank. The other end of the water inlet pipe is provided with multiple water spray nozzles with upward openings. One end of the air-blowing pipe is connected to the air outlet of the air-blowing device, and the other end of the air-blowing pipe passes through the second perforation and extends into the bottom of the water tank. The air-blowing device can introduce external compressed gas into the bottom of the water tank through the air-blowing pipe. The overflow port is located above the top opening of the filter element, and the overflow port allows water in the water tank to flow out.

[0007] Optionally, the centerline of the spray nozzle is inclined relative to the vertical centerline toward the side closer to the center of the water tank.

[0008] Optionally, the water inlet pipe includes a main water pipe and multiple horizontal branch pipes. The multiple horizontal branch pipes are laid horizontally on the bottom wall of the water tank. Each horizontal branch pipe is provided with multiple water spray nozzles. One end of the main water pipe is adapted to connect to a water source. The other end of the main water pipe passes through the first perforation and is connected to one of the horizontal branch pipes. The multiple horizontal branch pipes are interconnected.

[0009] Optionally, the transverse branch pipe is divided into a first transverse branch pipe and a second transverse branch pipe, wherein the first transverse branch pipe extends along the width direction of the water tank, and a plurality of the first transverse branch pipes are distributed at intervals along the length direction of the water tank. The second transverse branch extends along the length of the water tank, and one end of the plurality of first transverse branch pipes is connected through a second transverse branch pipe, and the other end of the plurality of first transverse branch pipes is connected through a second transverse branch pipe.

[0010] Optionally, a plurality of first through holes are arranged in an array on the first perforated plate, with the plurality of first through holes in each row spaced apart along the length direction of the water tank, and the plurality of first through holes in each column spaced apart along the width direction of the water tank.

[0011] Optionally, the air-blowing device is a compressor located outside the frame. The air-blowing pipe includes a first air-blowing pipe and a second air-blowing pipe. The first air-blowing pipe is located at the bottom of the water tank, and the second air-blowing pipe passes through the second perforation. The bottom end of the second air-blowing pipe is connected to the air outlet of the compressor, and the top end of the second air-blowing pipe is connected to the first air-blowing pipe. The first air-blowing pipe has multiple air-blowing ports with upward openings.

[0012] Optionally, it also includes a second orifice plate and a third orifice plate. The second orifice plate is arranged in parallel below the first orifice plate and above the water spray nozzle. The second orifice plate has a plurality of second through holes that extend along its thickness direction. The plurality of second through holes correspond one-to-one with the plurality of first through holes along the height direction of the frame. The diameter of the second through holes of the second orifice plate is smaller than the inner diameter of the filter element. The third perforated plate is horizontally installed in the water tank and located above the first perforated plate. The third perforated plate has a plurality of third through holes that extend along its thickness direction. The plurality of third through holes correspond one-to-one with the plurality of first through holes in the height direction of the frame. The diameter of the third through holes is smaller than the inner diameter of the filter element. The filter element passes through the first through hole on the first perforated plate and rests between the first and third perforated plates. The bottom end of the filter element faces the second through hole, and the top end of the filter element faces the third through hole. The overflow port is located above the third perforated plate.

[0013] Optionally, in the height direction of the frame, the distance s between the bottom surface of the second perforated plate and the top surface of the water inlet pipe where the water nozzle is located is 4~7cm.

[0014] Optionally, the inner walls of opposite sides of the frame are fixed with first supports, and the first supports on both sides together support the first perforated plate.

[0015] Optionally, the frame includes a base plate and a surrounding plate, the base plate covering and fixed to the bottom opening of the surrounding plate to enclose and form the water tank; the first through hole and the overflow port are provided in the surrounding plate, and the second through hole is provided in the base plate; Casters are installed at the four corners of the base plate.

[0016] The filter cleaning equipment of this application cleans the filter element by inserting and fixing the tubular filter element through the first through hole of the first perforated plate. Water is injected into the water tank through the water inlet pipe, and the water flows from the spray nozzle to the inner hole and outer surface of the filter element to wash away residual dust particles, chemical fibers, or other chemical impurities on the surface of the filter element. At the same time, the aeration device introduces compressed air into the bottom of the water tank through the aeration pipe, agitating the water in the tank and driving the water flow to wash the surface of the filter element, making the water flow clean the filter element more thoroughly. Moreover, the compressed gas is released in the water, generating a large number of small, uniform bubbles, which cause the impurities washed out in the tank to float to the surface under the action of the bubbles and separate more thoroughly from the surface of the filter element. During the cleaning process, the wastewater containing suspended particulate matter and dissolved dirt is continuously driven by the water flow to the overflow port at the top of the water tank and discharged. Thus, the process is carried out continuously in a dynamic "water inlet-aeration-overflow discharge" manner, which can ensure the cleaning effect of the filter element. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the filter cleaning device provided in one embodiment of the present invention; Figure 2 for Figure 1 A bottom view of the water inlet pipe.

[0019] The reference numerals in the accompanying drawings are as follows: 1. Frame; 11. Water tank; 12. First perforation; 13. Second perforation; 14. Overflow outlet; 15. First support; 16. Base plate; 17. Enclosure; 18. Casters; 2. First perforated plate; 21. First through hole; 3. Water inlet pipe; 31. Spray nozzle; 32. Main water pipe; 33. Horizontal branch pipe; 331. First horizontal branch pipe; 332. Second horizontal branch pipe; 4. Air blower pipe; 41. First air blower pipe; 42. Second air blower pipe; 43. Air outlet; 5. Second perforated plate; 51. Second through hole; 6. Third perforated plate; 61. Third through hole. Detailed Implementation

[0020] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0021] One embodiment of this utility model provides a filter element cleaning device for cleaning tubular filter elements, such as... Figure 1 As shown, it includes a frame 1, a first perforated plate 2, a water inlet pipe 3, an air blowing pipe 4, and an air blowing device. The frame 1 has a water tank 11. The first perforated plate 2 is horizontally installed in the water tank 11. The first perforated plate 2 is provided with a first through hole 21 that extends along its thickness direction. The first through hole 21 is used to install and fix the filter element.

[0022] The side plate of the frame 1 is provided with a first through hole 12, a second through hole 13 and an overflow port 14 that are connected to the water tank 11. One end of the water inlet pipe 3 is suitable for connecting to a water source, and the other end of the water inlet pipe 3 passes through the first through hole 12 and extends into the bottom of the water tank 11. The other end of the water inlet pipe 3 is provided with multiple water spray nozzles 31 with the opening facing upward. The water spray nozzles 31 can spray water onto the filter element.

[0023] One end of the air pipe 4 is connected to the air outlet of the air blowing device, and the other end of the air pipe 4 passes through the second perforation 13 and extends into the bottom of the water tank 11. The air blowing device is used to introduce external compressed gas into the water tank 11 through the air pipe 4.

[0024] The overflow port 14 is located above the top opening of the filter element, and the water in the water tank 11 flows out through the overflow port 14.

[0025] Understandably, during rinsing, it is necessary to ensure sufficient pressure so that the water flow can effectively penetrate the filter element pores and carry away impurities. Therefore, one end of the inlet pipe 3 can be directly connected to a high-pressure water source, or a low-pressure water source can be pressurized by a water pump and delivered to one end of the inlet pipe 3 so that the water flow has a certain pressure and flow rate to flow out from the spray nozzle 31 to rinse the inner pores and external structure of the filter element and achieve the cleaning effect on the surface of the filter element.

[0026] Specifically, when using the filter cartridge cleaning equipment to clean filter cartridges, the filter cartridge to be cleaned is first carefully removed from the center of the packaging, ensuring that no large visible impurities are attached. Then, the tubular filter cartridge is vertically and securely inserted into the first through-hole 21 of the first perforated plate 2. The water inlet pipe 3 is turned on, and water is injected into the water tank 11 through the inlet pipe 3. The water flows from bottom to top through the spray nozzle 31 of the inlet pipe 3, washing away residual dust particles, chemical fibers, or other chemical impurities on the filter cartridge surface. The filter cartridge is then immersed in the water in the water tank 11. Simultaneously with the water injection, the aeration device is activated, and compressed air from outside is introduced into the water tank 11 from the bottom, agitating the water and driving the water flow to flush the filter cartridge surface, making the water flow more thorough in cleaning the filter cartridge. The compressed gas is released in the water, generating a large number of small, uniform bubbles, causing the impurities washed out of the water tank 11 to float to the surface under the action of the bubbles, separating them more thoroughly from the filter cartridge surface. During the cleaning process, the wastewater containing suspended particulate matter and dissolved dirt is continuously drawn by the water flow to the overflow port 14 above the water tank 11 and discharged into the subsequent wastewater treatment system.

[0027] The above dynamic process of "water inlet - air agitation - overflow discharge" continues until the set cleaning time ends or the filter element is confirmed to have been cleaned and marked through online / offline testing (such as visual cleaning, water turbidity meeting standards, etc.).

[0028] When cleaning the filter element using the filter element cleaning equipment of this application, the tubular filter element is inserted and fixed in the first through hole 21 of the first perforated plate 2. Water is injected into the water tank 11 through the water inlet pipe 3. The water flows from the spray nozzle 31 and flows through the inner hole and outer surface of the filter element to wash away the dust particles, chemical fibers or other chemical impurities remaining on the surface of the filter element. At the same time, the air blowing device introduces compressed air into the bottom of the water tank 11 through the air blowing pipe 4, agitating the water in the water tank 11 and driving the water flow to wash the surface of the filter element, making the water flow clean the filter element more thoroughly. Moreover, the compressed gas is released in the water, generating a large number of small, uniform bubbles, which cause the impurities washed down in the water tank 11 to float to the surface under the action of the bubbles and separate more thoroughly from the surface of the filter element. During the cleaning process, the wastewater containing suspended particulate matter and dissolved dirt is continuously drawn into the overflow port 14 above the water tank 11 and discharged under the impetus of the water flow. This dynamic "water inlet-air agitation-overflow discharge" method continuously cleans the filter element, ensuring the cleaning effect of the filter element, removing production residues from the new filter element, restoring the optimal permeability and retention accuracy of the new filter element, improving the initial filtration efficiency of the new filter element, preventing impurities from affecting the chemical composition balance of the solution when the new filter element is initially used in the filtration system, avoiding a sudden increase in pressure difference due to impurities clogging the filter element during the first use, and extending the service life of the filter element.

[0029] In one embodiment, the centerline of the spray nozzle 31 is inclined to the side closer to the center of the water tank 11 relative to the vertical centerline, so that the water flow sprayed from the spray nozzle 31 flows from bottom to top of the filter element in a relatively gentle but wide-coverage manner. The water flow is sprayed at an angle, which reduces the impact on the filter element and has less impact on the performance of the filter element.

[0030] In one embodiment, such as Figure 1 and 2 As shown, the water inlet pipe 3 includes a main water pipe 32 and multiple horizontal branch pipes 33. The multiple horizontal branch pipes 33 are laid horizontally at the bottom of the water tank 11. Each horizontal branch pipe 33 is provided with multiple spray nozzles 31. One end of the main water pipe 32 is suitable for connecting to a water source. The other end of the main water pipe 32 passes through the first perforation 12 and is connected to one of the horizontal branch pipes 33. The multiple horizontal branch pipes 33 are interconnected.

[0031] Water is supplied through a main water pipe 32 to multiple horizontal branch pipes 33 and sprayed out from multiple spray nozzles 31 on the multiple horizontal branch pipes 33. The arrangement of multiple horizontal branch pipes 33 can increase the number of spray nozzles 31. The water flow sprayed from the multiple spray nozzles 31 cleans the multiple filter elements nearby, thereby improving the uniformity of cleaning the filter elements in various positions in the water tank 11 and improving the cleaning effect.

[0032] In one embodiment, such as Figure 2 As shown, the transverse branch pipe 33 is divided into a first transverse branch pipe 331 and a second transverse branch pipe 332. The first transverse branch pipe 331 extends along the width direction of the water tank 11, and multiple first transverse branch pipes 331 are distributed at intervals along the length direction of the water tank 11.

[0033] The second transverse branch pipe 332 extends along the length of the water tank 11. One end of the plurality of first transverse branch pipes 331 is connected through a second transverse branch pipe 332, and the other end of the plurality of first transverse branch pipes 331 is connected through a second transverse branch pipe 332.

[0034] In one embodiment, there are four first transverse branch pipes 331 and two second transverse branch pipes 332, and the bottom end of the main water pipe 32 is connected to the leftmost first transverse branch pipe 331.

[0035] In one embodiment, such as Figure 1 As shown, a plurality of first through holes 21 are arrayed on the first perforated plate 2. The plurality of first through holes 21 in each row are spaced apart along the length direction of the water tank 11, and the plurality of first through holes 21 in each column are spaced apart along the width direction of the water tank 11.

[0036] The arrangement direction of the multiple first through holes 21 in each row is the same as the arrangement direction of the multiple spray nozzles 31 on the second transverse branch pipe 332. This is beneficial for the water flow from the multiple spray nozzles 31 of the second transverse branch pipe 332 to be aligned with the filter element installed in the multiple first through holes 21 in each row. The arrangement direction of the multiple first through holes 21 in each column is the same as the arrangement direction of the multiple spray nozzles 31 on the first transverse branch pipe 331. This is beneficial for the water flow from the multiple spray nozzles 31 of the first transverse branch pipe 331 to be aligned with the filter element installed in the multiple first through holes 21 in each column. This further improves the uniformity of cleaning the filter elements in each position in the water tank 11.

[0037] In one embodiment, the air blowing device is a compressor (not shown in the figure). The compressor is located outside the frame 1. The air blowing pipe 4 includes a first air blowing pipe 41 and a second air blowing pipe 42. The first air blowing pipe 41 is located at the bottom of the water tank 11. The second air blowing pipe 42 passes through the second through hole 13. The bottom end of the second air blowing pipe 42 is connected to the air outlet of the compressor. The top end of the second air blowing pipe 42 is connected to the first air blowing pipe 41. The first air blowing pipe 41 has a plurality of air blowing ports 43 with the opening facing upward.

[0038] The compressor compresses outside air into high-pressure gas, which is delivered to the second air pipe 42 through the first air pipe 41 and flows upward from multiple air ports 43 on the second air pipe 42. The compressed air is released upward in the water tank 11 to agitate the water flow around the filter element.

[0039] The first air-blowing pipe 41 is installed inside the water tank 11, thereby enabling multiple air-blowing ports 43 to be installed along the length of the first air-blowing pipe 41. This increases the number of locations where compressed gas can flow out, allowing compressed gas to be released at various locations at the bottom of the water tank 11 to agitate the water flow, thereby improving the uniformity of cleaning the filter elements in various locations within the water tank 11.

[0040] In one embodiment, such as Figure 1 As shown, it also includes a second perforated plate 5 and a third perforated plate 6. The second perforated plate 5 is arranged in parallel below the first perforated plate 2 and above the water spray nozzle 31. The second perforated plate 5 has a plurality of second through holes 51 extending along its thickness direction. The plurality of second through holes 51 correspond one-to-one with the plurality of first through holes 21 along the height direction of the frame 1. The diameter of the second through holes 51 of the second perforated plate 5 is smaller than the inner diameter of the filter element.

[0041] The third perforated plate 6 is horizontally installed in the water tank 11 and located above the first perforated plate 2. The third perforated plate 6 has multiple third through holes 61 that extend through its thickness direction. The multiple third through holes 61 correspond one-to-one with the multiple first through holes 21 in the height direction of the frame 1. The diameter of the third through holes 61 is smaller than the inner diameter of the filter element.

[0042] The filter element passes through the first through hole 21 on the first perforated plate 2 and abuts between the first perforated plate 2 and the third perforated plate 6. The bottom end of the filter element is directly opposite the second through hole 51, and the top end of the filter element is directly opposite the third through hole 61. The overflow port 14 is located above the third perforated plate 6.

[0043] During the cleaning process, water can flow into the inner hole of the filter element through the second through hole 51 of the second perforated plate 5, and can carry impurities out through the third through hole 61 of the third perforated plate 6.

[0044] The filter element is radially limited by the first through hole 21 of the first perforated plate 2, and axially limited by the second perforated plate 5 and the third perforated plate 6. Compared with clamping and fixing by a fixture, the filter element is not subjected to a large force, thus reducing the impact on the filter element.

[0045] In one embodiment, such as Figure 1 As shown, in the height direction of the frame 1, the distance s between the bottom surface of the second perforated plate 5 and the top surface of the water inlet pipe 3 where the spray nozzle 31 is located is 4~7cm.

[0046] The spray nozzle 31 and the second perforated plate 5 need to maintain a certain distance to allow the water flow to fully diffuse behind the spray nozzle 31 and collide and reflect with the second perforated plate 5, thereby forming a strong and uniform turbulent zone at the bottom of the filter element. The distance s will affect the pressure distribution inside the filter element during backwashing. It is necessary to ensure that the water flow has sufficient pressure to effectively penetrate the pores of the filter element and carry away impurities.

[0047] When the distance is too close (s<3cm), the high-pressure water flow will concentrate on impacting a small number of filter elements directly in front, like a "water jet," potentially damaging these elements while leaving the outer filter elements almost unwashed, resulting in uneven cleaning. Furthermore, the turbulent zone is small, leading to low overall cleaning efficiency, ineffective removal of impurities, and poor cleaning results.

[0048] If the distance is too far (e.g., s>8cm), the water flow velocity decreases significantly by the time it reaches the second perforated plate 5, resulting in insufficient kinetic energy. This fails to generate effective turbulence to shake off particles tightly adhering to the filter element, leading to insufficient cleaning power. Furthermore, the water flow may not effectively cover the outermost filter element, resulting in incomplete cleaning of some areas. To achieve a cleaning effect, a higher inlet water pressure may be required, resulting in energy waste.

[0049] Therefore, setting the distance s to 4~7cm allows the water flow from the nozzle 31 to fully diffuse, forming a strong and uniform turbulent field under the entire second perforated plate 5. This turbulent field acts on all filter elements, thoroughly flushing away contaminants on their surfaces and discharging them through the drain, achieving uniform and efficient cleaning. This avoids excessive impact in certain areas, ensuring that all filter elements are cleaned gently and effectively, greatly extending their service life.

[0050] Specifically, the distance s is 5cm. 5cm is an optimized distance under common system operating pressures (0.2~0.6MPa) and flow rates, balancing cleaning power and coverage. Of course, the distance s can be adjusted according to actual needs in actual use.

[0051] In one embodiment, such as Figure 1 As shown, the inner walls of the opposite sides of the frame 1 are fixed with first brackets 15, and the first brackets 15 on both sides jointly support the first perforated plate 2. The structure is simple and easy to disassemble and assemble.

[0052] In one embodiment, the inner walls of opposite sides of the frame 1 are fixed with second brackets, and the second brackets on both sides jointly support the second perforated plate 5.

[0053] In one embodiment, a third bracket is fixed to the inner wall surface of opposite sides of the chassis. Each third bracket is provided with a slot with an opening facing the opposite third bracket. The opposite sides of the third perforated plate 6 are respectively engaged in the slot.

[0054] In one embodiment, the first perforated plate 2, the second perforated plate 5, and the third perforated plate 6 are all made of PP material.

[0055] In one embodiment, such as Figure 1 As shown, the frame 1 includes a base plate 16 and a surrounding plate 17. The base plate 16 covers the bottom opening of the surrounding plate 17 to form a water tank 11. A first through hole 12 and an overflow port 14 are provided on the surrounding plate 17, and a second through hole 13 is provided on the base plate 16.

[0056] Casters 18 are installed at the four corners of the base plate 16, allowing the filter cleaning equipment to be moved to different working locations as needed.

[0057] In one embodiment, an overflow pipe is also included, one end of which is connected to an overflow port 14, and the other end of which is adapted to be connected to a wastewater treatment system.

[0058] In other embodiments, the water inlet pipe 3 may consist of only one main water pipe 32, one end of which is connected to a water source, and the other end of which passes through the first perforation 12 and bends in an S-shape or U-shape along the bottom wall of the water tank 11.

[0059] In other embodiments, the multiple transverse branches 33 can be connected end to end in sequence, forming a zigzag arrangement.

[0060] In other embodiments, the first through holes 21 on the first perforated plate 2 may be distributed in multiple rings, each ring having a plurality of first through holes 21 spaced apart along the circumferential direction, and the multiple rings of distribution are concentric.

[0061] In other embodiments, the blowing device may be an air blower.

[0062] In other embodiments, the second perforated plate 5 and the third perforated plate 6 can be omitted. A clamping mechanism can be provided on both sides of each first through hole 21 on the first perforated plate 2. The clamping part of the clamping mechanism is provided with a clamping hole. The filter element can pass through the clamping hole and the first through hole 21. The clamping mechanism can drive the clamping part to clamp the outer surface of the filter element.

[0063] In other embodiments, hooks can be provided on the two opposite walls of the frame 1, and corresponding hanging holes can be provided on the first perforated plate 2 so that the first perforated plate 2 can be hung on the hooks on both sides.

[0064] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A filter element cleaning device for cleaning tubular filter elements; characterized in that, The device includes a frame, a first perforated plate, a water inlet pipe, an air blower pipe, and an air blower. The frame has a water tank, and the first perforated plate is horizontally installed in the water tank. The first perforated plate is provided with a first through hole that extends along its thickness direction. The first through hole is used to insert and fix the filter element. The frame is provided with a first through hole, a second through hole and an overflow port communicating with the water tank. One end of the water inlet pipe is adapted to be connected to a water source, and the other end of the water inlet pipe passes through the first through hole and extends into the bottom of the water tank. The other end of the water inlet pipe is provided with multiple water spray nozzles with upward openings. One end of the air-blowing pipe is connected to the air outlet of the air-blowing device, and the other end of the air-blowing pipe passes through the second perforation and extends into the bottom of the water tank. The air-blowing device can introduce external compressed gas into the bottom of the water tank through the air-blowing pipe. The overflow port is located above the top opening of the filter element, and the overflow port allows water in the water tank to flow out.

2. The filter element cleaning equipment according to claim 1, characterized in that, The centerline of the spray nozzle is inclined relative to the vertical centerline towards the side closer to the center of the water tank.

3. The filter element cleaning equipment according to claim 2, characterized in that, The water inlet pipe includes a main water pipe and multiple horizontal branch pipes. The multiple horizontal branch pipes are laid horizontally on the bottom wall of the water tank. Each horizontal branch pipe is provided with multiple water spray nozzles. One end of the main water pipe is adapted to connect to a water source. The other end of the main water pipe passes through the first perforation and is connected to one of the horizontal branch pipes. The multiple horizontal branch pipes are interconnected.

4. The filter element cleaning equipment according to claim 3, characterized in that, The transverse branch pipe is divided into a first transverse branch pipe and a second transverse branch pipe. The first transverse branch pipe extends along the width direction of the water tank, and multiple first transverse branch pipes are distributed at intervals along the length direction of the water tank. The second transverse branch extends along the length of the water tank, and one end of the plurality of first transverse branch pipes is connected through a second transverse branch pipe, and the other end of the plurality of first transverse branch pipes is connected through a second transverse branch pipe.

5. The filter element cleaning equipment according to claim 4, characterized in that, The first perforated plate has a plurality of first through holes arranged in an array, with the plurality of first through holes in each row spaced apart along the length of the water tank, and the plurality of first through holes in each column spaced apart along the width of the water tank.

6. The filter element cleaning equipment according to claim 1, characterized in that, The air blowing device is a compressor, which is located outside the frame. The air blowing pipe includes a first air blowing pipe and a second air blowing pipe. The first air blowing pipe is located at the bottom of the water tank, and the second air blowing pipe passes through the second through hole. The bottom end of the second air blowing pipe is connected to the air outlet of the compressor, and the top end of the second air blowing pipe is connected to the first air blowing pipe. The first air blowing pipe has multiple air blowing ports with the opening facing upward.

7. The filter element cleaning equipment according to claim 1, characterized in that, It also includes a second orifice plate and a third orifice plate. The second orifice plate is arranged in parallel below the first orifice plate and above the water spray nozzle. The second orifice plate has a plurality of second through holes that extend through it along its thickness direction. The plurality of second through holes correspond one-to-one with the plurality of first through holes along the height direction of the frame. The diameter of the second through holes of the second orifice plate is smaller than the inner diameter of the filter element. The third perforated plate is horizontally installed in the water tank and located above the first perforated plate. The third perforated plate has a plurality of third through holes that extend along its thickness direction. The plurality of third through holes correspond one-to-one with the plurality of first through holes in the height direction of the frame. The diameter of the third through holes is smaller than the inner diameter of the filter element. The filter element passes through the first through hole on the first perforated plate and rests between the first and third perforated plates. The bottom end of the filter element faces the second through hole, and the top end of the filter element faces the third through hole. The overflow port is located above the third perforated plate.

8. The filter element cleaning equipment according to claim 7, characterized in that, In the height direction of the frame, the distance s between the bottom surface of the second perforated plate and the top surface of the water inlet pipe where the water nozzle is located is 4~7cm.

9. The filter element cleaning equipment according to claim 1, characterized in that, The inner walls of opposite sides of the frame are fixed with first brackets, and the first brackets on both sides together support the first perforated plate.

10. The filter element cleaning equipment according to claim 1, characterized in that, The frame includes a base plate and a surrounding plate. The base plate covers and is fixed to the bottom opening of the surrounding plate to enclose and form the water tank. The first through hole and the overflow port are provided in the surrounding plate, and the second through hole is provided in the base plate. Casters are installed at the four corners of the base plate.

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