Filter cartridge for multi-stage filtration and water purifying apparatus having the same

Abstract

This utility model discloses a multi-stage filtration filter element and a water purification device having the same. The filter element includes PP cotton filter media and a filter assembly. The outer side of the PP cotton filter media is the water inlet surface, and the inner side has a water outlet channel. The filter assembly includes multiple annular filter meshes, which are sequentially fitted around the PP cotton filter media along the radial direction of the filter element. The filtration accuracy of the filter meshes is greater than that of the PP cotton filter media, and the filtration accuracy of the multiple filter meshes increases sequentially from the inside to the outside of the filter element. This utility model uses multiple filter meshes on the outer side of the PP cotton filter media, and the filtration accuracy of the multiple filter meshes is different from that of the PP cotton filter media. Thus, the raw water first passes through multiple filter meshes for filtration, and then passes through the PP cotton filter media for filtration. This avoids the PP cotton filter media directly filtering tap water containing a large number of large particles. Furthermore, the PP cotton filter media is supported by multiple filter meshes on its outer side, preventing tap water from damaging the PP cotton filter media, thereby improving the lifespan of the PP cotton filter media.

Description

Technical Field

[0001] This utility model relates to the field of water purification, and in particular to a multi-stage filtration filter element and a water purification device having the same. Background Technology

[0002] The existing PP cotton filter cartridge has a relatively fragile structure and is easily damaged by external forces under high water pressure or improper use. At the same time, when directly filtering tap water containing a lot of large particles, the large particles will clog the filter cartridge. Both of these situations will reduce the life of the PP cotton filter cartridge. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a multi-stage filtration filter element and a water purification device having the same.

[0004] The first aspect of this utility model provides a multi-stage filtration filter element, comprising PP cotton filter media and a filtration assembly. The outer side of the PP cotton filter media is the water inlet surface, and the interior of the PP cotton filter media has a water outlet channel. The filtration assembly includes multiple annular filter meshes, which are sequentially fitted around the PP cotton filter media along the radial direction of the filter element. The filtration accuracy of the filter meshes is greater than that of the PP cotton filter media, and the filtration accuracy of the multiple filter meshes increases sequentially from the inside of the filter element to the outside of the filter element.

[0005] Furthermore, the sidewall of the filter mesh includes multiple filter holes. Except for the outermost filter mesh, the filter holes of the other multiple filter meshes are provided with several ribs, and the ribs and the hole wall of the filter holes form several flow channels for raw water to pass through.

[0006] Furthermore, the filter aperture is polygonal in shape.

[0007] Furthermore, except for the outermost filter mesh, the other filter meshes are integrally formed with the ribs.

[0008] Furthermore, when there are multiple ribs within the filter hole, the multiple ribs are arranged in a cross pattern.

[0009] Furthermore, there are three filter meshes: the innermost and outermost filter meshes are both plastic meshes, while the middle filter mesh is a metal mesh.

[0010] Furthermore, the distance between the outer wall and the inner wall of the filter mesh is 0.3mm-1mm.

[0011] Furthermore, it also includes an upper end cover and a lower end cover, the upper end cover being located above the lower end cover, the PP cotton filter material and the filter assembly being installed between the upper end cover and the lower end cover, the upper end cover having a water outlet, and the water outlet being connected to the water outlet channel.

[0012] Furthermore, it also includes a sensor for detecting whether the filter element is clogged and a backflushing device. The sensor is located at the water outlet, and the sensor is electrically connected to the backflushing device, which is connected to the water outlet.

[0013] The multi-stage filtration filter element according to this utility model has at least the following technical effects:

[0014] 1. Multiple filter meshes are installed on the outer shell of the PP cotton filter media, and the filtration precision of these multiple filter meshes is different from that of the PP cotton filter media. Thus, the raw water first passes through multiple filter meshes and then through the PP cotton filter media for filtration. This avoids the PP cotton filter media directly filtering tap water containing a large number of large particles. In addition, the outer shell of the PP cotton filter media is supported by multiple filter meshes, which prevents tap water from damaging the PP cotton filter media, thereby improving the lifespan of the PP cotton filter media.

[0015] 2. The innermost and outermost filter meshes are both made of plastic, which is convenient to manufacture and reduces costs. The middle filter mesh is made of metal, which can support the plastic mesh and prevent tap water from damaging the PP cotton filter material.

[0016] The water purification device of the second aspect of this utility model includes: the multi-stage filtration filter element of the first aspect embodiment.

[0017] The water purification equipment according to this utility model has at least the following technical effects:

[0018] 1. The water purification equipment is equipped with a filter element according to the first aspect embodiment, which improves the service life of the water purification equipment.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Additional aspects and advantages of this utility model will become apparent and readily understood from the description of the technical solution in conjunction with the following drawings, wherein:

[0021] Figure 1 A cross-sectional view of a multi-stage filtration filter cartridge;

[0022] Figure 2 A top view showing multiple filter meshes sequentially fitted over PP cotton filter media;

[0023] Figure 3 This is a schematic diagram of the structure of the first grid;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic diagram of the second grid structure;

[0026] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0027] Figure 7 This is a schematic diagram of the third grid structure;

[0028] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0029] Figure 9 This is a schematic diagram of the structure of the sensor and backflushing device in conjunction with the filter element.

[0030] Reference numerals: PP cotton filter media 100, inlet surface 110, outlet channel 120, filter assembly 200, filter mesh 210, filter hole 211, rib 212, flow channel 213, upper end cover 300, outlet 310, lower end cover 400, sensor 500, backwash device 600, first pump 700. Detailed Implementation

[0031] The technical solution of this utility model is described in detail below. Examples of the technical solution are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The technical solution described below with reference to the accompanying drawings is exemplary and is only used to explain this utility model, and should not be construed as limiting this utility model.

[0032] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0035] Reference Figure 1 , 2 As shown, the filter element provided in the first aspect embodiment of this utility model includes a PP cotton filter material 100 and a filter assembly 200. The outer side of the PP cotton filter material 100 is the water inlet surface 110, and the PP cotton filter material 100 has a water outlet channel 120 inside. The filter assembly 200 includes a plurality of annular filter meshes 210. The plurality of filter meshes 210 are sequentially sleeved on the outside of the PP cotton filter material 100 along the radial direction of the filter element. The filtration accuracy of the filter meshes 210 is greater than that of the PP cotton filter material 100. The filtration accuracy of the plurality of filter meshes 210 increases sequentially from the inside of the filter element to the outside of the filter element.

[0036] Multiple filter meshes 210 are provided on the outer shell of the PP cotton filter media 100. The filtration precision of the multiple filter meshes 210 is different from that of the PP cotton filter media 100. Thus, the raw water first passes through the multiple filter meshes 210 and then passes through the PP cotton filter media 100 for filtration. This avoids the PP cotton filter media 100 directly filtering tap water containing a large number of large particles. In addition, the outer shell of the PP cotton filter media 100 is supported by multiple filter meshes 210, which prevents tap water from damaging the PP cotton filter media 100 (the filter meshes 210 will block some tap water from impacting the PP cotton filter media 100), thereby improving the lifespan of the PP cotton filter media 100.

[0037] It is understandable that filtration precision refers to the size of the pores. Assuming that the higher the filtration precision, the larger the corresponding pore size, the filter media can only intercept large particles such as sediment in tap water. Conversely, assuming that the lower the filtration precision, the smaller the corresponding pore size, the filter media can intercept small particles or other small-sized substances in tap water.

[0038] Specifically, for example, there are three filter grids 210. The filtration accuracy of the three filter grids 210 increases sequentially from the inside of the filter element to the outside of the filter element. The filter grid 210 closest to the inside of the filter element has a filtration accuracy of 50 μm, the filter grid 210 furthest from the inside of the filter element has a filtration accuracy of 200 μm, and the filter grid 210 located between the two filter grids has a filtration accuracy of 100 μm.

[0039] At work, such as Figure 1 As shown, tap water enters the filter assembly 200 from one side of the filter element. The tap water passes through multiple filter meshes 210 in sequence. The multiple filter meshes 210 intercept large particles such as silt, medium-sized impurities, and micron-sized suspended solids in the tap water in sequence. After being filtered by multiple filter meshes 210, the tap water enters the PP cotton filter material 100 from the water inlet surface 110. The PP cotton filter material 100 intercepts pollutant particles in the tap water. The water filtered by the PP cotton filter material 100 is then discharged from the water outlet channel 120.

[0040] Furthermore, such as Figure 3 , 4 As shown in Figures 5 and 6, the sidewall of the filter mesh 210 includes multiple filter holes 211, such as... Figure 4 As shown, except for the outermost filter grid 210, as Figure 6 , 7 As shown in Figure 8, the filter holes 211 of the remaining filter grids 210 are provided with several ribs 212, and the ribs 212 and the hole walls of the filter holes 211 form several flow channels 213 for raw water to pass through.

[0041] The filter holes 211 contain several ribs 212. The ribs 212 can be integrally molded with the filter mesh 210 via injection molding, or they can be installed into the filter holes 211 after the filter mesh 210 has been manufactured. The specific number of ribs 212 can be set according to the required filtration precision. For example, when a higher filtration precision is required (to intercept medium-sized particulate impurities), such as... Figure 6 As shown, a rib 212 can be provided inside the filter hole 211. The rib 212 divides the filter hole 211 into two parts, forming two flow channels 213. The flow channels 213 only allow substances smaller than medium-sized particulate impurities to pass through, or when a lower filtration precision is required (requiring the interception of micron-sized suspended matter), such as... Figure 8 As shown, more than two ribs 212 can be provided in the filter hole 211, thereby dividing the filter hole 211 into multiple parts and forming multiple flow channels 213. The flow channels 213 are relatively small in size, thus enabling them to trap micron-sized suspended matter.

[0042] Furthermore, such as Figure 4As shown, the filter hole 211 is polygonal in shape, which facilitates the placement of the rib 212 inside the filter hole 211.

[0043] Specifically, the filter hole 211 is square, rhomboid, or hexagonal in shape.

[0044] Furthermore, except for the outermost filter mesh 210, the other filter meshes 210 are integrally formed with the ribs 212, which facilitates the manufacturing of the filter meshes 210 and the ribs 212.

[0045] Furthermore, such as Figure 8 As shown, when there are multiple ribs 212 inside the filter hole 211, the multiple ribs 212 are arranged in a cross manner, which makes it convenient to divide the filter hole 211 into multiple parts and form multiple flow channels 213.

[0046] Furthermore, there are three filter meshes 210. The innermost filter mesh 210 and the outermost filter mesh 210 are both plastic meshes, while the middle filter mesh 210 is a metal mesh.

[0047] The innermost and outermost filter meshes 210 are both made of plastic, which is convenient to manufacture and reduces costs (if made of metal, the manufacturing cost would be high). The middle filter mesh 210 is made of metal, which can support the plastic mesh and prevent tap water from damaging the PP cotton filter material 100.

[0048] It can be understood that the number of filter meshes 210 is not necessarily three; it can be two, four, five, or more. Multiple filter meshes 210 can also be plastic meshes or metal meshes.

[0049] Specifically, there are three filter grids 210. The outermost filter grid 210 is defined as the first grid, the middle filter grid 210 is defined as the second grid, and the innermost filter grid 210 is defined as the third grid.

[0050] like Figure 4 As shown, the filter holes 211 of the first grid do not have ribs 212. The filtration accuracy of the first grid is greater than 200μm. The first grid can intercept large particles such as mud and sand.

[0051] like Figure 6 As shown, a rib 212 is provided inside the filter hole 211 of the second grid. The rib 212 divides the filter hole 211 into two parts, forming two flow channels 213. The filtration accuracy of the second grid is 100μm-200μm. The second grid can intercept medium particulate impurities.

[0052] like Figure 8As shown, two ribs 212 are provided in the filter hole 211 of the third grid. The two ribs 212 are arranged crosswise, and the two ribs 212 divide the filter hole 211 into four parts, forming four flow channels 213. The filtration accuracy of the third grid is 50μm-100μm, and the third grid can intercept micron-sized suspended matter.

[0053] PP cotton filter media 100 has a filtration accuracy of 1μm-50μm and can intercept pollutant particles of 1μm-50μm.

[0054] Furthermore, such as Figure 1 As shown, the distance α1 between the outer wall and the inner wall of the filter mesh 210 is 0.3mm-1mm, that is, the thickness of the filter mesh 210 is 0.3mm-1mm, to ensure that tap water does not damage the PP cotton filter material 100.

[0055] Specifically, the surface of the filter mesh 210 is provided with nano-scale... The coating reduces the adhesion of soil particles and other impurities to the filter mesh 210, ensuring the water flow area, improving filtration efficiency, and solving the clogging problem while ensuring filtration accuracy.

[0056] Other coatings can also be applied to the surface of the filter mesh 210 while ensuring that the clogging problem can be solved.

[0057] Furthermore, such as Figure 1 As shown, it also includes an upper end cover 300 and a lower end cover 400. The upper end cover 300 is located above the lower end cover 400. The PP cotton filter media 100 and the filter assembly 200 are installed between the upper end cover 300 and the lower end cover 400. The upper end cover 300 has a water outlet 310, which is connected to the water outlet channel 120.

[0058] The filter element is easy to install by having an upper end cap 300 and a lower end cap 400.

[0059] During operation, raw water enters the filter element from the side and passes through multiple filter grids 210 in sequence. After filtration, the water enters the PP cotton filter media 100 through the inlet surface 110. The water filtered by the PP cotton filter media 100 is discharged from the filter element through the outlet channel 120 and the outlet 310.

[0060] Furthermore, such as Figure 9 As shown, it also includes a sensor 500 for detecting whether the filter element is clogged and a backwashing device 600. The sensor 500 is located at the water outlet 310 and is electrically connected to the backwashing device 600. The backwashing device 600 is connected to the water outlet 310.

[0061] By incorporating a sensor 500 and a backwashing device 600, when the sensor 500 detects a blockage in the filter element, the backwashing device 600 can drive the filtered pure water to enter the filter element through the outlet 310, and the pure water backwashes the filter element, flushing out the particles in the flow channel.

[0062] Specifically, sensor 500 detects whether the water flow rate is less than a preset threshold. If it is less, it indicates that the flow channel is blocked, and backwash device 600 is activated to backwash the filter element with pure water. Conversely, if the flow rate is higher, it indicates that the flow channel is not blocked, and the filter element outputs pure water normally.

[0063] Specifically, it also includes a first pump 700, which is located upstream of the filter element. The first pump 700 delivers raw water to the filter mesh 210. The backwash device 600 includes a second pump. When there is no blockage, the second pump is turned off, and the first pump is started and drives the raw water to pass through multiple filter meshes 210 and PP cotton filter media 100 in sequence to obtain pure water. When there is blockage, the first pump is turned off, and the second pump drives pure water into the filter element to backwash the filter element.

[0064] The water purification device provided in the second aspect of this utility model includes the filter element of the first aspect embodiment. By providing the filter element of the first aspect embodiment, the service life of the water purification device is improved.

[0065] Although the technical solutions of this utility model have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these technical solutions without departing from the principles and spirit of this utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A multi-stage filtration filter element, characterized in that, include: PP cotton filter media, wherein the outer side of the PP cotton filter media is the water inlet surface, and the inside of the PP cotton filter media has a water outlet channel; The filter assembly includes multiple annular filter meshes, which are sequentially fitted around the PP cotton filter material along the radial direction of the filter element. The filtration accuracy of the filter meshes is greater than that of the PP cotton filter material, and the filtration accuracy of the multiple filter meshes increases sequentially from the inside of the filter element to the outside of the filter element.

2. The filter element for multi-stage filtration according to claim 1, characterized in that: The sidewall of the filter mesh includes multiple filter holes. Except for the outermost filter mesh, the filter holes of the other multiple filter meshes are provided with several ribs. The ribs and the hole wall of the filter holes form several flow channels for raw water to pass through.

3. The filter element for multi-stage filtration according to claim 2, characterized in that: The filter aperture is polygonal in shape.

4. The filter element for multi-stage filtration according to claim 2, characterized in that: Except for the outermost filter mesh, all other filter meshes are integrally formed with the ribs.

5. The filter element for multi-stage filtration according to any one of claims 2-4, characterized in that: When there are multiple ribs in the filter hole, the multiple ribs are arranged in a cross pattern.

6. The filter element for multi-stage filtration according to any one of claims 1 to 4, characterized in that: The filter mesh consists of three parts: the innermost and outermost filter meshes are made of plastic, while the middle filter mesh is made of metal.

7. The filter element for multi-stage filtration according to claim 1, characterized in that: The distance between the outer wall and the inner wall of the filter mesh is 0.3mm-1mm.

8. The filter element for multi-stage filtration according to claim 1, characterized in that: It also includes an upper end cover and a lower end cover, the upper end cover being located above the lower end cover, the PP cotton filter material and the filter assembly being installed between the upper end cover and the lower end cover, the upper end cover having a water outlet, the water outlet being connected to the water outlet channel.

9. The filter element for multi-stage filtration according to claim 8, characterized in that: It also includes a sensor for detecting whether the filter element is clogged and a backflushing device. The sensor is located at the water outlet and is electrically connected to the backflushing device, which is connected to the water outlet.

10. A water purification device, characterized in that, include: The filter element for multi-stage filtration as described in any one of claims 1-9.

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