CN211521801U

CN211521801U - Filter element assembly and water purifier with same

Info

Publication number: CN211521801U
Application number: CN201922263362.0U
Authority: CN
Inventors: 贺素平; 官阔荣
Original assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Current assignee: Zhejiang Shaoxing Supor Domestic Electrical Appliance Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-09-18
Anticipated expiration: 2029-12-16

Abstract

The utility model provides a filter element group spare and purifier that has it. The filter cartridge assembly comprises a filter flask having an open end and a closed end; the filter element joint is used for plugging the open end and is provided with a water inlet channel and a first water outlet channel; the second filter element and the first filter element are sequentially arranged in the filter flask along the axial direction of the filter flask, and the first filter element is arranged between the second filter element and the closed end; the first filter element is provided with a first water inlet end of an outer side surface, a first water outlet end of an inner side surface and a first central hole which extends from the end surface of the first filter element facing to the open end to the closed end along the axial direction and is surrounded by the inner side surface; and the scale inhibitor is filled in the first central hole, the outer side surfaces of the first filter element and the second filter element and the inner side surface of the filter bottle are separated to form an annular flow channel, and the water inlet channel, the annular flow channel, the first water inlet end, the first water outlet end, the first central hole, the second filter element and the first water outlet channel are sequentially communicated. Like this, first filter core is before the antisludging agent to integrated in the filter core subassembly with the second filter core, purifier compact structure.

Description

Filter element assembly and water purifier with same

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a filter element group spare and purifier that has this filter element group spare.

Background

With the improvement of living standard, people have higher and higher requirements on water quality. The popularization of the water purifier is becoming wider and wider, and products of new technology are better meeting the requirements of people.

The reverse osmosis filter element is one of the core components of the water purifier, and the reverse osmosis technology is a membrane separation and filtration technology which takes pressure difference as driving force and separates a solvent from a solution. Because the water quality of various places is uneven, the water quality of some places is hard and easy to scale, the reverse osmosis membrane is blocked, and the service life of the reverse osmosis filter element is seriously influenced. Accordingly, a technology of disposing a scale inhibitor inside a reverse osmosis filter element to prevent water scaling has appeared. The scale inhibitor is mainly used for interacting with metals such as calcium, magnesium, manganese and the like in raw water, reducing the content of the metal ions in the raw water and preventing the scale from forming on the surface of the reverse osmosis filter element to reduce the service life of the reverse osmosis filter element. In addition, the raw water also contains various impurities such as gravel, silt, residual chlorine and the like, and the impurities also easily cause the blockage of the reverse osmosis filter element, so that a one-stage or multi-stage preposed filter element is required to be arranged in front of the reverse osmosis filter element. Most purifier adopts the mode that hinders sieve filtration principle progressive structure, concatenates by multistage filter core head and the tail and forms, and filter core precision is arranged by low to high in proper order to realize that multistage filter core apportionment holds back the filth, thereby reduce the reverse osmosis filter core and block up and tear the number of times of washing, prolong the cycle of changing the filter core.

However, the water purifier is large in overall size and large in occupied space due to the head-to-tail serial connection structure, and is very disadvantageous particularly in the situation that the water purifier tends to be miniaturized. In addition, the structure of end-to-end series connection also leads to overlong water flow channels in the water purifier, increases the flow resistance, further leads to larger power of the whole water purifier, and violates the requirements of energy conservation and environmental protection.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems of the prior art, according to one aspect of the present invention, a filter element assembly is provided. The filter element assembly comprises a filter bottle and a filter element connector, the filter bottle is provided with an open end and a closed end, the filter element connector blocks the open end, and the filter element connector is provided with a water inlet channel and a first water outlet channel; the first filter element and the second filter element are sequentially arranged in the filter flask along the axial direction of the filter flask, the first filter element is positioned between the second filter element and the closed end, the first filter element is provided with a first central hole, the first central hole extends to the closed end from the end surface, facing the open end, of the first filter element along the axial direction, the first filter element is provided with a first water inlet end positioned on the outer side surface of the first filter element and a first water outlet end positioned on the inner side surface of the first filter element, and the inner side surface of the first filter element is surrounded to form the first central hole; and the scale inhibitor is filled in the first central hole, wherein the outer side surfaces of the first filter element and the second filter element are spaced from the inner side surface of the filter flask, so that an annular flow channel is formed between the outer side surfaces of the first filter element and the second filter element and the inner side surface of the filter flask, and the water inlet channel, the annular flow channel, the first water inlet end of the first filter element, the first water outlet end of the first filter element, the first central hole, the second filter element and the first water outlet channel are sequentially communicated.

By this arrangement, the first filter element can be arranged before the scale inhibitor, and the first filter element, the scale inhibitor and the second filter element can all be integrated in the filter element assembly. Rivers can filter behind multiple impurity such as grit, silt, chlorine residue through first filter core earlier, then get rid of metal ion such as calcium, magnesium, manganese by the antisludging agent, rethread second filter core is further filtered for filter element group spare can be applicable to the place that quality of water is harder. Meanwhile, the space occupied by the filter element in the water purifier is greatly reduced, and the structure of the water purifier is more compact, so that the water purifier is more exquisite and small, and the layout of the water purifier can be more selectively in various places. Meanwhile, the length of the flow channel in the water purifier can be shortened, the flow resistance of water flow is reduced, the power of the water purifier is reduced, and the purposes of energy conservation and environmental protection are achieved.

Illustratively, the second filter element has a second central hole extending axially, the second filter element has a second water inlet end located on a first end surface thereof and a second water outlet end located on an inner side surface thereof, the first end surface faces the closed end, the inner side surface of the second filter element surrounds and forms the second central hole, and the second water outlet end of the second filter element is communicated to the first water outlet channel through the second central hole. Therefore, the water flow in the filter element assembly is smooth, and the flow resistance of the water flow is lower.

Illustratively, the filter cartridge assembly further comprises a third filter element inserted into the second central bore, the third filter element having an axially extending third central bore, the third filter element having a third water inlet end on an outer side thereof and a third water outlet end on an inner side thereof, the third central bore communicating to the first water outlet passage. Through the arrangement, the filter element assembly can have more layers of filter elements, so that the water quality of the water flow filtered by the filter element assembly is better.

Illustratively, the second central bore is a stepped bore having a first step facing the closed end, the second central bore includes a first section between the first step and the first end face, the cartridge assembly further includes a first end cap having a first annular flange extending from an outer periphery thereof toward the open end, the third cartridge is inserted into a recess formed by the first annular flange, and the first end cap blocks the second central bore at the first end face. With this arrangement, the first end cap can separate the first central opening from the second central opening in the water path, such that water exiting through the first outlet end of the first filter element can pass entirely through the first end face of the second filter element into the second filter element for filtration. Meanwhile, the end part of the third filter element close to the closed end can be firmly clamped in the groove formed by the first annular flange.

Illustratively, the third central bore extends through the third filter element. Therefore, the size of the third water outlet end can be increased, so that the flow resistance of water flow is reduced, the power of the water purifier is reduced, and the purposes of energy conservation and environmental protection are achieved.

Illustratively, the stepped bore further has a second step facing the closed end, the second step being closer to the open end than the first step, the second central bore further includes a second section located between the first step and the second step, the second section having an inner diameter smaller than an inner diameter of the first section, the filter element assembly further includes a second end cap, the second end cap includes an annular support and a sleeve extending from an inner peripheral edge of the annular support toward the open end, the outer peripheral edge of the annular support has a flange extending toward the closed end, the sleeve is inserted into the second section of the second central bore and abuts against the second step, the annular support abuts against the first step, and an end of the third filter element near the open end is inserted into a space surrounded by the flange. The second end cap can be matched with the first end cap to firmly fix the third filter element, and simultaneously, the water flow flowing out from the second water outlet end can completely enter the third filter element for filtering.

Illustratively, the third filter element comprises an activated carbon filter element, an ultrafiltration membrane filter element or a composite filter element formed by compounding a plurality of the activated carbon filter element and the ultrafiltration membrane filter element. Through this kind of setting, can promote the taste through the filterable rivers of filter element group spare, quality of water is more high-quality.

Illustratively, the second filter element comprises a reverse osmosis filter element, the second filter element further comprises a second additional water outlet end positioned on a second end surface of the second filter element, the second end surface faces the open end, and the filter element joint comprises a second water outlet channel communicated to the second additional water outlet end. Therefore, the structure can ensure the normal work of the reverse osmosis filter element and has the advantage of simple structure.

Illustratively, the filter element assembly further comprises a water flow separating cap, the water flow separating cap is sleeved at the second end face to the second filter element, the water flow separating cap is provided with a first water outlet and a second water outlet, the first water outlet is located at the center of the water flow separating cap and communicated to the second central hole, and the second water outlet is communicated to the second additional water outlet end of the second filter element and the second water outlet channel. Thus, the structure can ensure the separation of the concentrated water and the pure water, and has the advantage of simple structure.

Exemplarily, the filter element assembly further comprises a mounting seat located between the first filter element and the second filter element along the axial direction, the end of the first filter element and the end of the second filter element are respectively connected to the mounting seat at two sides of the mounting seat, the mounting seat is provided with a mounting seat through hole, and the mounting seat through hole is aligned with the first central hole. The mounting can on the one hand maintain the position of the first and second filter element and can also provide a certain flow separation to give the desired flow direction.

Illustratively, the mount includes a bulkhead, the mount through-hole being located in a center of the bulkhead; an inner peripheral wall extending from an inner periphery of the separator toward the closed end; and first and second outer peripheral walls extending from outer peripheral edges of the partition plate toward the closed end and the open end, respectively, the inner peripheral wall, the partition plate, and the first outer peripheral wall forming an annular groove into which an end portion of the first filter element near the open end is inserted, an end portion of the second filter element near the closed end is inserted into a space surrounded by the second outer peripheral wall, and the end portion of the second filter element near the open end is spaced apart from the partition plate. With this arrangement, the end of the first filter element adjacent the closed end can be held firmly in the annular groove, and the end of the second filter element adjacent the closed end can be held firmly in the space surrounded by the second peripheral wall.

Illustratively, the first central bore extends through the first filter cartridge, the filter cartridge assembly further comprising a third end cap comprising an annular baffle, an inner annular wall and an outer annular wall extending from inner and outer peripheries of the annular baffle, respectively, toward the open end to form an annular socket, an end of the first filter cartridge proximate the closed end being plugged into the annular socket, the third end cap being sealingly connected to the closed end of the filter flask. Through the arrangement, the third end cap can be matched with the annular groove to fix the first filter element firmly, and meanwhile, water flow passing through the annular flow passage can be completely filtered by entering the first filter element through the first water inlet end.

Illustratively, the first filter element comprises a PP cotton filter element, an activated carbon filter element, an ultrafiltration membrane filter element or a composite filter element formed by compounding a plurality of the PP cotton filter element, the activated carbon filter element and the ultrafiltration membrane filter element. Therefore, through the arrangement, different types of the first filter element can be selected according to the types of impurities in the raw water, and the first filter element can be applied to more areas with different water quality.

According to another aspect of the present invention, there is also provided a water purifier, comprising any one of the filter element assemblies as described above.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a cut-away perspective view of a filter cartridge assembly according to an exemplary embodiment of the present invention;

FIG. 2 is a cross-sectional view of the filter cartridge assembly shown in FIG. 1; and

fig. 3 is a schematic water path diagram of a water purifier according to an exemplary embodiment of the present invention.

Wherein the figures include the following reference numerals:

100. a filter element assembly; 200. a filter flask; 201. an open end; 202. a closed end; 210. an annular flow passage; 300. a filter element joint; 310. a water inlet channel; 320. a first water outlet channel; 330. a second water outlet channel; 340. a water flow separating cap; 341. a first water outlet; 342. a second water outlet; 400. a first filter element; 410. a first central aperture; 420. a first water inlet end; 430. a first water outlet end; 440. a third end cap; 441. an annular baffle; 442. an inner annular wall; 443. an outer annular wall; 500. a second filter element; 510. a second central aperture; 511. a first stage; 512. a second stage; 520. a second water inlet end; 530. a second water outlet end; 540. a first step; 550. a first end face; 551. a second end face; 560. a first end cap; 561. a first annular flange; 570. a second step; 580. a second end cap; 581. a ring-shaped support; 582. a shaft sleeve; 583. flanging; 590. a second additional water outlet end; 600. a scale inhibitor; 700. a third filter element; 710. a third central aperture; 720. a third water inlet end; 730. a third water outlet end; 800. a mounting seat; 810. a mounting seat through hole; 820. a partition plate; 830. an inner peripheral wall; 840. a first outer peripheral wall; 850. a second peripheral wall; 900. a water purifier; 910. a water inlet electromagnetic valve; 920. a booster pump; 930. a concentrated water electromagnetic valve.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

The utility model provides a filter element assembly 100. The filter element assembly 100 is mainly used in a water purifier 900 for filtering and purifying water. Therefore, the utility model discloses still provide a purifier 900. The filter element assembly 100 can filter and purify drinking water in the family life. In addition, the filter element assembly 100 can also be used for filtering and purifying water used in scientific research, medicine, food, beverage, seawater desalination and other fields, and therefore, the water purifier 900 provided herein can also be applied to these fields. That is to say, under the circumstances that impurity and harmful substance in the needs were filtered to aquatic, all can adopt the utility model provides a principle.

A filter cartridge assembly 100 according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 3.

The arrows shown in fig. 2-3 schematically illustrate the direction of water flow within the filter cartridge assembly 100 and the water purifier 900. As shown in fig. 1-2, the filter cartridge assembly 100 can include a filter flask 200, a filter cartridge adapter 300, a first filter cartridge 400, a second filter cartridge 500, and a scale inhibitor 600.

Filter flask 200 can have an open end 201 and a closed end 202, and cartridge adapter 300 can close off open end 201. Cartridge adapter 300 may have an inlet passage 310 and a first outlet passage 320. Illustratively, the cartridge adapter 300 can be used to close off the open end 201 in a variety of ways, such as spin-on welding, gluing, and the like.

The first filter cartridge 400 and the second filter cartridge 500 may be sequentially disposed in the filter flask 200 in an axial direction of the filter flask 200. The first filter element 400 and the second filter element 500 may be the same or different filter elements of any kind, such as a PP cotton filter element, an activated carbon filter element, a reverse osmosis filter element, an ultrafiltration filter element, and the like, or a composite filter element integrating a plurality of filter elements, such as a composite filter element integrating a PP cotton filter element and an activated carbon filter element. First cartridge 400 is adjacent closed end 202 of filter flask 200 and second cartridge 500 is adjacent open end 201 of filter flask 200. First cartridge 400 is positioned between second cartridge 500 and closed end 202. The first filter element 400 has a first central bore 410, the first central bore 410 extending in an axial direction from an end face of the first filter element 400 facing the open end 201 (in the figures, the bottom face of the first filter element 400) towards the closed end 202. The first filter element 400 has a first inlet end 420 on its outer side and a first outlet end 430 on its inner side, the inner side of the first filter element 400 surrounding the first central bore 410, i.e., the first outlet end 430 can be a sidewall of the first central bore 410.

The scale inhibitor 600 is filled in the first center hole 410. The scale inhibitor 600 is mainly used for interacting with metals such as calcium, magnesium, manganese and the like in raw water, reducing the content of the metal ions in the raw water, and preventing the scale from forming on the surface of the filter element to reduce the service life of the filter element. Different types and/or components of scale inhibitors can be selected for different filter elements. The utility model discloses do not intend to restrict the type and the composition of antisludging agent as long as can realize its function. The scale inhibitor 600 can be used in a wide range of concentrations to control the scaling of inorganic salts on the surface of the filter element. The manner of filling the scale inhibitor 600 in the first central hole 410 may be various, for example, a non-woven fabric may be disposed in the first central hole 410, and the non-woven fabric wraps the scale inhibitor 600. The manner in which the scale inhibitor 600 is filled is well known in the art and therefore will not be described in further detail herein. Preferably, the antisludging agent 600 may be 10-15 g, and the efficiency of the antisludging treatment of the water flow in the first central hole 410 by the antisludging agent 600 is high.

Wherein the outer sides of the first and

second cartridges

400 and 500 are spaced apart from the inner side of the filter flask 200 to form an annular flow channel 210 between the outer sides of the first and

second cartridges

400 and 500 and the inner side of the filter flask 200. The inlet channel 310, the annular flow channel 210, the first inlet end 420 of the first filter element 400, the first outlet end 430 of the first filter element 400, the first central bore 410, the second filter element 500, and the first outlet channel 320 may be in communication in that order.

As shown in fig. 2-3, the filter cartridge assembly 100 of the above-described structure may have a connected water path formed therein. The water flow can enter the annular flow channel 210 through the water inlet channel 310, enter the first filter element 400 through the first water inlet end 420, be filtered by the first filter element 400, flow out through the first water outlet end 430, be subjected to scale inhibition treatment by the scale inhibitor 600 in the first central hole 410, be filtered by the second filter element 500, and flow out through the first water outlet channel 320.

With this arrangement, the first filter element 400 may be disposed before the scale inhibitor 600, and the first filter element 400, the scale inhibitor 600, and the second filter element 500 may all be integrated within the filter element assembly 100. Rivers can filter behind multiple impurity such as grit, silt, chlorine residue through first filter core 400 earlier, then by metal ion such as antisludging agent 600 detach calcium, magnesium, manganese, rethread second filter core 500 further filters for filter element subassembly 100 can be applicable to the place that quality of water is harder. Meanwhile, the space occupied by the filter element in the water purifier 900 is greatly reduced, and the structure of the water purifier 900 is more compact, so that the water purifier 900 is more exquisite and small, and the layout of the water purifier can be more selectively in various places. Meanwhile, the length of the flow channel in the water purifier 900 can be shortened, the flow resistance of water flow is reduced, the power of the water purifier 900 is reduced, and the purposes of energy conservation and environmental protection are achieved.

Illustratively, as shown in FIGS. 2-3, the second cartridge 500 has an axially extending second central bore 510, the second cartridge 500 having a second water inlet end 520 at a first end surface 550 thereof and a second water outlet end 530 at an inner side thereof, the first end surface 550 facing the closed end 202. The inner side of the second cartridge 500 surrounds the second central bore 510, i.e., the second outlet end 530 can be a sidewall of the second central bore 510. The second outlet end 530 of the second filter cartridge 500 communicates with the first outlet channel 320 via the second central aperture 510. The second central hole 510 and the first water outlet channel 320 may be directly or indirectly communicated, for example, another filter element is disposed in the second central hole 510, and then the second central hole is communicated with the first water outlet channel 320 through the filter element, which will be described in detail later with reference to specific embodiments.

The water flow can enter the annular flow channel 210 through the water inlet channel 310, enter the first filter element 400 through the first water inlet end 420, be filtered by the first filter element 400, flow out through the first water outlet end 430, then be subjected to scale inhibition treatment by the scale inhibitor 600 in the first central hole 410, be filtered by the second filter element 500, and then flow out through the second water outlet end 530, the second central hole 510 and the first water outlet channel 320 in sequence. Thus, the water flow in the filter element assembly 100 is smooth and the flow resistance of the water flow is low.

Illustratively, as shown in fig. 2, the cartridge assembly 100 further includes a third cartridge 700. The third cartridge 700 is inserted into the second central bore 510. The third cartridge 700 has a third central bore 710 extending axially. The third filter element 700 has a third inlet end 720 on its outer side and a third outlet end 730 on its inner side, i.e., the third outlet end 730 can be a sidewall of the third central bore 710. The third center hole 710 is communicated to the first outlet passage 320. Preferably, the first center hole 410, the second center hole 510, and the third center hole 710 may be coaxially disposed.

As shown in fig. 2-3, the water filtered by the second filter element 500 can flow out from the second water outlet 530, enter the third filter element 700 through the third water inlet 720, and flow out through the third water outlet 730 and the first water outlet 320 in sequence after being filtered by the third filter element 700. The waterway before the second water outlet end 530 can refer to the description of the corresponding parts above, and the description thereof will not be repeated for brevity. The third filter element 700 may be any kind of filter element, such as a PP cotton filter element, an activated carbon filter element, an ultrafiltration filter element, and the like, or a composite filter element integrating a plurality of filter elements, such as a PP cotton filter element and an activated carbon filter element. With this arrangement, the filter cartridge assembly 100 can be provided with more levels of filter elements, resulting in better quality of the water stream filtered by the filter cartridge assembly 100.

Illustratively, as shown in fig. 2, a third central bore 710 extends through the third cartridge 700. Therefore, the size of the third water outlet end 730 can be increased, so that the flow resistance of water flow is reduced, the power of the water purifier 900 is reduced, and the purposes of energy conservation and environmental protection are achieved.

Preferably, the third filter element 700 may include an activated carbon filter element, an ultrafiltration membrane filter element, or a composite filter element formed by combining a plurality of the above elements.

The active carbon filter element integrates the functions of adsorption, filtration, interception and catalysis, can effectively remove organic matters, residual chlorine and other radioactive impurities in water, and has the effects of decoloring and removing peculiar smell. The active carbon filter element is mainly used for adsorbing impurities such as heterochrosis, peculiar smell, organic impurities and the like in water.

The ultrafiltration membrane filter core has the characteristics of good chemical stability, acid and alkali resistance, bacteria resistance, high filtering precision, large pollutant interception capacity, good drinking water taste, good pressure bearing performance, strong pollution resistance and the like. The ultrafiltration membrane filter element is mainly used for removing bacteria, colloid, rust, suspended matters, silt, macromolecular organic matters and other impurities. Through this kind of setting, can promote the taste of the water current of crossing the filtration of filter element group spare 100, quality of water is more high-quality.

Illustratively, as shown in fig. 2, the second central bore 510 is a stepped bore having a first step 540, the first step 540 facing the closed end 202, the second central bore 510 including a first segment 511 between the first step 540 and the first end face 550. The filter cartridge assembly 100 further comprises a first end cap 560, the first end cap 560 having a first annular flange 561 extending from its outer periphery towards the open end 201. The third cartridge 700 is inserted into a recess formed by the first annular flange 561 and the first end cap 560 closes off the second central bore 510 at the first end face 550. Preferably, referring to fig. 2, the first end cap 560 may close off the upper end of the second center hole 510 by providing a sealing member (e.g., a packing) between the outer circumferential surface of the first end cap 560 and the inner wall of the second center hole 510.

With this arrangement, the first end cap 560 can fluidly isolate the first central bore 410 from the second central bore 510 such that water exiting through the first outlet end 430 of the first filter cartridge 400 can pass entirely from the first end face 550 of the second filter cartridge 500 into the second filter cartridge 500 for filtration. At the same time, the end of the third cartridge 700 adjacent the closed end 202 can be firmly retained within the recess formed by the first annular flange 561.

In order to allow the water filtered by the first filter element 400 to enter the second filter element 500 from the first end surface 550 of the second filter element 500, a water flow passage is provided at the top of the second filter element 500, for example, the first end surface 550 of the second filter element 500 is spaced apart from the member above the first end surface 550, or a groove may be provided on the first end surface 550, as long as the water can enter the second filter element 500 from the first end surface 550.

Illustratively, as shown in fig. 2, the stepped bore also has a second step 570 facing the closed end 202, the second step 570 being closer to the open end 201 than the first step 540 (in the figure, the second step 570 is below the first step 540). Second central bore 510 also includes a second section 512 located between first step 540 and second step 570, the inner diameter of second section 512 being smaller than the inner diameter of first section 511. The filter cartridge assembly 100 may also include a second end cap 580, the second end cap 580 including an annular tray 581 and a boss 582 extending from an inner periphery of the annular tray 581 toward the open end 201. The outer periphery of the ring-shaped holder 581 has a flange 583 extending toward the closed end 202. Bushing 582 is inserted into the second section of second central bore 510 and abuts second step 570. The ring-shaped bracket 581 abuts the first step 540. The end of the third filter element 700 near the open end 201 (in the figure, the bottom of the third filter element 700) is inserted into the space enclosed by the flange 583. A sealing element (e.g., a gasket) may be disposed between the outer side of the boss 582 and the inner wall of the second central bore 510. The second end cap 580 can engage the first end cap 560 to secure the third filter cartridge 700 while allowing all of the water exiting through the second outlet end 530 to enter the third filter cartridge 700 for filtration.

Illustratively, as shown in fig. 2, the cartridge assembly 100 further includes a mounting seat 800 located between the first cartridge 400 and the second cartridge 500 in the axial direction. An end of the first cartridge 400 (in the figure, the bottom of the first cartridge 400) and an end of the second cartridge 500 (in the figure, the top of the second cartridge 500) are connected to the mount 800 at both sides of the mount 800, respectively, the mount 800 having a mount through hole 810, the mount through hole 810 being aligned with the first center hole 410. The water flowing out through the first outlet end 430 can enter the second filter cartridge 500 through the through hole 810 of the mounting seat and the second inlet end 520. The mounting 800 can maintain the position of the first and

second filter cartridges

400 and 500, on the one hand, and can also provide some flow separation to provide a desired flow direction.

Illustratively, as shown in fig. 2, the mount 800 includes a partition 820, an inner circumferential wall 830, a first outer circumferential wall 840, and a second outer circumferential wall 850. The mount through-hole 810 may be located at the center of the spacer 820. The inner circumferential wall 830 extends from the inner circumference of the partition 820 toward the closed end 202. The first peripheral wall 840 and the second peripheral wall 850 extend from the outer periphery of the partition 820 toward the closed end 202 and the open end 201, respectively. The inner peripheral wall 830, the partition 820 and the first outer peripheral wall 840 form an annular groove 860. The end of the first cartridge 400 adjacent to the open end 201 (the bottom of the first cartridge 400 in the figure) is inserted into the annular groove 860, the end of the second cartridge 500 adjacent to the closed end 202 (the top of the second cartridge 500 in the figure) is inserted into the space enclosed by the second peripheral wall 850, and the end of the second cartridge 500 adjacent to the open end 201 is spaced apart from the partition 820. Preferably, the partition 820 can be ribbed on the side near the open end 201 (in the figure, the bottom surface of the partition 820), so that a water flow channel is formed between the first end surface 550 of the second filter cartridge 500 and the partition 820, and the water flow can flow out through the first water outlet end 430 and then enter the second filter cartridge 500 through the through hole 810 of the mounting seat and the second water inlet end 520. With this arrangement, the end of the first cartridge 400 adjacent the closed end 202 can be securely retained within the annular groove 860, and the end of the second cartridge 500 adjacent the closed end 202 can be securely retained within the space enclosed by the second peripheral wall 850.

Illustratively, as shown in fig. 2, the first central bore 410 extends through the first filter cartridge 400, and the filter cartridge assembly 100 further includes a third end cap 440, the third end cap 440 including an annular baffle 441, an inner annular wall 442 and an outer annular wall 443, the inner annular wall 442 and the outer annular wall 443 extending from the inner periphery and the outer periphery of the annular baffle 441, respectively, toward the open end 201 to form an annular slot into which an end portion of the first filter cartridge 400 near the closed end 202 (in the figure, the top portion of the first filter cartridge 400) is plugged. The third end cap 440 is sealingly connected to the closed end 202 of the filter flask 200 (the top of the filter flask 200 in the figures). That is, the flow of water can only enter the first filter cartridge 400 from the first inlet end 420 of the first filter cartridge 400, but not enter the first filter cartridge 400 from the first central bore 410. With this arrangement, the third cap 440 may engage the annular groove 860 to securely retain the first filter cartridge 400, while allowing all of the water flowing through the annular channel 210 to enter the first filter cartridge 400 through the first water inlet 420 for filtration.

Illustratively, the second filter element 500 comprises a reverse osmosis filter element, and the second filter element 500 further has a second additional water outlet end 590 located at a second end face 551 thereof. The second end 551 is disposed opposite to the first end 550 and is closer to the open end 201 than the first end 550. The second end surface 551 faces the open end 201. The cartridge adapter 300 has a second outlet passage 330 communicating with a second additional outlet port 590.

The reverse osmosis filter element is made of common materials such as cellulose nitrate, cellulose acetate and polyamide, the pore diameter of the reverse osmosis filter element is about one-ten-million (0.0001 micron) of hair, the reverse osmosis filter element can not be seen by naked eyes, bacteria and viruses are about 5000 times of the reverse osmosis filter element, therefore, only water molecules and partial mineral ions can pass through the reverse osmosis filter element, and other impurities and heavy metals are all discharged from the waste water pipe. The reverse osmosis filter element utilizes reverse osmosis to only permeate a solvent (usually water) to intercept ionic substances or small molecular substances, and uses static pressure at two sides of a membrane as a driving force to realize a membrane process for separating a liquid mixture. Has the advantages of high water quality of produced water, low operation cost, no pollution, convenient operation, reliable operation and the like. Through being provided with the reverse osmosis filter core, can effectively get rid of impurity such as soluble metal salt, organic matter, colloidal particle, the material that generates heat, bacterium, virus in the aquatic, guarantee water safety makes the rivers of purifying reach the requirement of straight drinking water.

Since the reverse osmosis cartridge produces concentrate in a certain proportion while producing pure water, the reverse osmosis cartridge has a second additional outlet end 590. The water flow is filtered by the reverse osmosis filter element, the concentrated water can be completely discharged through the second additional water outlet 590 and the second water outlet 330, and the pure water can be completely discharged through the second water outlet 530, so as to achieve the effect of purifying the water flow. Therefore, the structure can ensure the normal work of the reverse osmosis filter element and has the advantage of simple structure.

Illustratively, as shown in fig. 2, the filter cartridge assembly 100 further comprises a water flow separating cap 340, the water flow separating cap 340 is sleeved to the second filter cartridge 500 at a second end 551, the water flow separating cap 340 has a first water outlet 341 and a second water outlet 342, the first water outlet 341 is located at the center of the water flow separating cap 340 and is communicated to the second central hole 510, and the second water outlet 342 is communicated to the second additional water outlet 590 of the second filter cartridge 500 and the second water outlet channel 330. Preferably, the water flow separating cap 340 may be sealingly connected to the cartridge connector 300, for example by a sealing element, so that the first and

second water outlets

341 and 342 may be spaced apart. The water flow is filtered by the reverse osmosis filter element, the concentrated water can be discharged from the second additional water outlet 590 through the second water outlet 342, and the pure water can be discharged from the second water outlet 530 through the first water outlet 341. Thus, the structure can ensure the separation of the concentrated water and the pure water, and has the advantage of simple structure.

Illustratively, the first filter element 400 includes a PP cotton filter element, an activated carbon filter element, an ultrafiltration membrane filter element, or a composite filter element formed by combining a plurality of the above elements.

The PP cotton filter element has the characteristics of strong dirt holding capacity, long service life, low cost, integration of surface, deep layer and coarse and fine filtration, corrosion resistance, high pressure resistance, low cost and the like. The PP cotton filter element is mainly used for blocking large-particle impurities such as rust, silt, worm eggs and the like in water.

The ultrafiltration membrane filter element has the characteristics of good chemical stability, acid and alkali resistance, bacteria resistance, high filtering precision, large pollutant interception capacity, good drinking water taste, good pressure bearing performance, strong pollution resistance and the like. The ultrafiltration membrane filter element is mainly used for removing bacteria, colloid, rust, suspended matters, silt, macromolecular organic matters and other impurities.

Therefore, through the arrangement, different types of the first filter element 400 can be selected according to the types of impurities in the raw water, and the first filter element 400 can be applied to more areas with different water quality.

According to another aspect of the present invention, a water purifier 900 is also provided. The water purifier 900 includes any of the filter cartridge assemblies 100 described above. Various configurations, existing or that may come into existence in the future, may be employed for the other components of water purifier 900. The present invention is not intended to be limited thereto. Accordingly, these components will not be described in detail herein. In the case where the reverse osmosis cartridge is included in the second cartridge 500, the water purifier 900 may include a water inlet solenoid valve 910 and a pressurizing pump 920, as shown in fig. 3. The water inlet solenoid valve 910 and the booster pump 920 are sequentially connected before the water inlet passage 310 of the filter cartridge assembly 100 in the water flow direction. The second outlet passage 330 may be followed by a concentrate solenoid valve 930. The first water outlet passage 320 may be connected to a tap or a line machine to deliver pure water.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front", "back", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A filter element assembly, comprising:

a filter flask (200) having an open end (201) and a closed end (202), and a cartridge adapter (300) plugging the open end, the cartridge adapter having an inlet water passage (310) and a first outlet water passage (320);

a first filter element (400) and a second filter element (500) which are sequentially arranged in the filter flask along the axial direction of the filter flask, wherein the first filter element is positioned between the second filter element and the closed end, the first filter element is provided with a first central hole (410), the first central hole extends from the end surface of the first filter element facing the open end to the closed end along the axial direction, the first filter element is provided with a first water inlet end (420) positioned on the outer side surface of the first filter element and a first water outlet end (430) positioned on the inner side surface of the first filter element, and the inner side surface of the first filter element surrounds to form the first central hole; and

a scale inhibitor (600) filled in the first center hole,

wherein the outer sides of the first and second cartridges are each spaced apart from the inner side of the filter flask to form an annular flow passage (210) between the outer sides of the first and second cartridges and the inner side of the filter flask,

the water inlet channel, the annular flow channel, the first water inlet end of the first filter element, the first water outlet end of the first filter element, the first central hole, the second filter element and the first water outlet channel are communicated in sequence.

2. The filter element assembly according to claim 1, wherein the second filter element (500) has an axially extending second central bore (510) having a second water inlet end (520) at a first end face (550) thereof facing the closed end (202) and a second water outlet end (530) at an inner side thereof, the inner side of the second filter element surrounding the second central bore, the second water outlet end of the second filter element being connected to the first water outlet channel (320) via the second central bore.

3. The filter element assembly according to claim 2, further comprising a third filter element (700) inserted into the second central bore (510), the third filter element having an axially extending third central bore (710) with a third water inlet end (720) at its outer side and a third water outlet end (730) at its inner side, the third central bore being connected to the first water outlet channel (320).

4. The filter element assembly according to claim 3, wherein the second central bore (510) is a stepped bore having a first step (540) facing the closed end (202), the second central bore comprising a first section (511) between the first step and the first end face (550), the filter element assembly further comprising a first end cap (560) having a first annular flange (561) extending from its outer periphery towards the open end (201), the third filter element being inserted into a recess formed by the first annular flange, the first end cap plugging the second central bore at the first end face.

5. The filter element assembly according to claim 4, wherein the third central bore (710) passes through the third filter element (700).

6. The filter element assembly according to claim 4, wherein the step bore further has a second step (570) facing the closed end (202), the second step being closer to the open end (201) than the first step (540), the second central bore (510) further comprising a second section (512) between the first step and the second step, the second section having an inner diameter smaller than an inner diameter of the first section, the filter element assembly further comprising a second end cap (580) comprising an annular holder (581) having an outer periphery with a flange (583) extending towards the closed end and a boss (582) extending from an inner periphery of the annular holder towards the open end, the boss being inserted into the second section of the second central bore and abutting the second step, the annular holder abutting the first step, the end of the third filter element (700) close to the open end is inserted into the space surrounded by the flange.

7. The filter element assembly according to claim 3, wherein the third filter element (700) comprises an activated carbon filter element, an ultrafiltration membrane filter element or a composite filter element formed by combining a plurality of the activated carbon filter elements and the ultrafiltration membrane filter element.

8. The filter element assembly according to claim 2, wherein the second filter element (500) comprises a reverse osmosis filter element, the second filter element further having a second additional water outlet end (590) at a second end face (551) thereof, the second end face facing the open end (201), the filter element adapter (300) having a second water outlet channel (330) communicating to the second additional water outlet end.

9. The filter element assembly according to claim 8, further comprising a water flow dividing cap (340) journalled to the second filter element (500) at the second end face (551) and having a first water outlet (341) and a second water outlet (342) thereon, the first water outlet being centrally located in the water flow dividing cap and communicating to the second central bore (510), the second water outlet communicating to the second additional water outlet end (590) and the second water outlet channel (330) of the second filter element.

10. The filter element assembly according to claim 1, further comprising a mounting seat (800) located in an axial direction between the first filter element (400) and the second filter element (500), ends of the first filter element and the second filter element being connected to the mounting seat on both sides of the mounting seat, respectively, the mounting seat having a mounting seat through hole (810) aligned with the first central hole (410).

11. The filter element assembly according to claim 10, wherein the mounting seat (800) comprises:

a spacer (820), the mount through-hole (810) being located at a center of the spacer;

an inner circumferential wall (830) extending from an inner circumference of the separator toward the closed end (202); and

a first peripheral wall (840) and a second peripheral wall (850) extending from the outer periphery of the separator toward the closed end and the open end (201), respectively,

the inner peripheral wall, the partition plate and the first outer peripheral wall form an annular groove into which an end portion of the first filter cartridge (400) near the open end is inserted,

an end of the second filter element (500) adjacent the closed end is inserted into the space enclosed by the second peripheral wall, the end of the second filter element adjacent the open end being spaced from the partition.

12. The filter cartridge assembly according to claim 1, wherein the first central bore (410) passes through the first filter cartridge (400), the filter cartridge assembly further comprising a third end cap (440) comprising an annular baffle (441), an inner annular wall (442) and an outer annular wall (443) extending from the inner and outer peripheries of the annular baffle, respectively, towards the open end (201) to form an annular slot to which the end of the first filter cartridge close to the closed end (202) is plugged, the third end cap being sealingly connected to the closed end of the filter flask (200).

13. The filter element assembly according to claim 1, wherein the first filter element (400) comprises a PP cotton filter element, an activated carbon filter element, an ultrafiltration membrane filter element or a composite filter element formed by combining a plurality of the filter elements.

14. A water purification machine comprising a filter element assembly according to any one of claims 1 to 13.