Composite filter element, filter element assembly and water purification system

Abstract

The utility model relates to the technical field of water treatment, in particular to a composite filter element, a filter element assembly and a water purification system, which comprise a first filter layer, an activated carbon fiber layer and a second filter layer which are sequentially wound on a central pipe from inside to outside, scale inhibitor or bacteriostatic agent particles are distributed on the activated carbon fiber layer; and when the activated carbon fiber layer is coiled, the scale inhibitor or bacteriostatic agent particles are sunk in the activated carbon fiber layer. The scale inhibitor is distributed on the activated carbon fiber layer in the form of particles, the scale inhibitor or bacteriostatic agent particles are well wrapped in the activated carbon fibers by utilizing the characteristics that the activated carbon fibers are thick, soft and easy to deform, and the deformation of the filter element is not caused, so that the scale inhibitor can be prevented from leaking, and the service life of the filter element is prolonged. And a special space for accommodating the scale inhibitor does not need to be arranged in the shell or the end cover.

Description

Technical Field

[0001] The utility model relates to the technical field of water treatment, in particular to a composite filter element, a filter element component and a water purification system. Background Art

[0002] Water purification products are water purifiers, which are water treatment equipment that deeply filters and purifies water according to the requirements of water use. Water purifiers can effectively filter out rust, sand, colloids in water, and absorb residual chlorine, odor, discoloration, pesticides and other chemical agents in water. They can effectively remove bacteria, germs, toxins, heavy metals and other impurities in water. They are widely used in both civil and commercial applications.

[0003] The Chinese utility model patent application number 2023212511271 discloses a filter element and a water purification device, such as Figure 1-3 As shown, the filter element includes: a shell; a raw water inlet; a waste water outlet; a clean water outlet; a first filter unit, a second filter unit and a containing assembly loaded with a scale inhibitor arranged in the shell; the raw water inlet is connected to the raw water end of the second filter unit, the waste water end of the second filter unit is connected to the waste water outlet, and the clean water end of the second filter unit is connected to the clean water outlet; the containing assembly is located upstream of the raw water end of the second filter unit, so that the water flowing in from the raw water inlet flows into the raw water end of the second filter unit after passing through the containing assembly; the first filter unit is located upstream of the raw water end of the second filter unit, or the first filter unit is located downstream of the clean water end of the second filter unit.

[0004] In the prior art, the filtration accuracy of the outer filter layer and the inner filter layer of the filter element are basically the same, and in order to ensure the filtering effect, the filtration accuracy of the outer filter layer and the inner filter layer are both high. After the filter element has been used for a long time, since large-volume impurities such as colloids cannot pass through the outer filter layer with high filtration accuracy, in most cases, the outer filter layer of the filter element will block a large amount of colloids, causing the filter element to be blocked, and the filter element needs to be replaced. However, in this case, the inner filter layer of the filter element still maintains its filtering capacity, and replacing the entire filter element will cause great waste.

[0005] In addition, the scale inhibitor in the prior art is placed in a special space provided in the housing or end cover, that is, at the front end of the raw water channel of the filter element. In this structure, the scale inhibitor is prone to leakage. In order to prevent the scale inhibitor from leaking, related parts need to be installed in the housing or end cover, which not only increases the difficulty of assembly, but also increases the manufacturing cost.

[0006] In addition, the water purification system in the prior art uses a carbon canister to remove chlorine, which will remove all the chlorine in the raw water. However, on the one hand, the carbon canister is more polluted when the core is replaced, and on the other hand, if the purified water does not contain chlorine, the water quality will easily become smelly and is not suitable for sanitary water needs. Utility Model Content

[0007] In order to solve the above problems, the purpose of the utility model is to provide a composite filter element, a filter element assembly, and a water purification system.

[0008] The technical solution provided by the utility model is:

[0009] In the first aspect, a composite filter element includes a first filter layer, an activated carbon fiber layer, and a second filter layer which are sequentially wound on a central tube from the inside to the outside; antiscalant or antibacterial agent particles are scattered on the activated carbon fiber layer; when the activated carbon fiber layer is rolled up, the antiscalant or antibacterial agent particles are trapped in the activated carbon fiber layer.

[0010] As an optional technical solution of the first aspect, the particle size of the antiscalant or antibacterial agent particles is greater than the filtration accuracy of the first filter layer, the activated carbon fiber layer, and the second filter layer, so that the antiscalant or antibacterial agent particles cannot pass through the first filter layer, the activated carbon fiber layer, and the second filter layer.

[0011] Optionally, the particle size of the antiscalant or antibacterial agent particles is 0.05 to 2.0 mm.

[0012] As an optional technical solution of the first aspect, the filtering accuracy of the second filter layer is lower than that of the first filter layer and the activated carbon fiber layer.

[0013] As an optional technical solution of the first aspect, the activated carbon fiber layer includes:

[0014] A transition filter layer, the transition filter layer is used to connect the first filter layer and the second filter layer;

[0015] Activated carbon fiber, the activated carbon fiber is placed on the transition filter layer.

[0016] Optionally, the second filter layer and the transition filter layer are separately provided, and the filtering accuracy of the second filter layer is smaller than the filtering accuracy of the transition filter layer.

[0017] Optionally, the second filter layer and the transition filter layer are integrally provided, and the filtering accuracy of the second filter layer is the same as that of the transition filter layer.

[0018] As an optional technical solution of the first aspect, the activated carbon fiber layer is a coated activated carbon fiber or activated carbon paper.

[0019] As an optional technical solution of the first aspect, it also includes a peelable layer, which is wound around the outside of the second filter layer and can be removed from the second filter layer.

[0020] In a second aspect, a filter element assembly comprises:

[0021] A housing, the housing being used to accommodate the composite filter element as in the first aspect or any optional technical solution of the first aspect;

[0022] End cap 1, which is installed at one end of the composite filter element and is sealed and connected to the end of the composite filter element;

[0023] End cover 2, the end cover 2 is installed at the other end of the composite filter element;

[0024] The second end cover is provided with:

[0025] A raw water inlet, the raw water inlet is in sealed communication with the gap;

[0026] The clean water outlet is sealed and connected to the clean water end of the composite filter element.

[0027] Optionally, the end cover 1 and the end cover 2 are detachably connected to the cover body 1 and the cover body 2 respectively;

[0028] The second cover body is provided with joints which are respectively connected with the raw water inlet and the purified water outlet in a sealed manner.

[0029] A third aspect is a water purification system.

[0030] Including the above-mentioned filter element assembly, after the raw water is filtered through the filter element assembly, the chlorine in the raw water is removed;

[0031] It also includes a non-chlorine removal filter element. After the raw water is filtered through the non-chlorine removal filter element, the chlorine in the raw water is retained;

[0032] The filter element assembly is connected in parallel with the non-dechlorination filter element. After the raw water is filtered by the parallel filter element assembly and the non-dechlorination filter element, the clean water produced by the filter element assembly and the clean water produced by the non-dechlorination filter element are mixed to form the clean water of the water purification system.

[0033] As an optional technical solution of the third aspect, there are multiple filter element assemblies, and the multiple filter element assemblies are arranged in parallel and / or in series; there are multiple non-chlorine-removing filter elements, and the multiple non-chlorine-removing filter elements are arranged in parallel and / or in series.

[0034] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0035] (1) The scale inhibitor of the utility model is dispersed in the form of particles on the activated carbon fiber layer. The thick, soft and flexible characteristics of the activated carbon fiber are utilized to better wrap the scale inhibitor or antibacterial agent particles in the activated carbon fiber without causing deformation of the filter element. This can prevent the scale inhibitor from leaking and eliminate the need to set up a special space for accommodating the scale inhibitor in the shell or end cover.

[0036] (2) The filter element of the present invention is provided with a peelable layer. When the peelable layer is clogged due to adhesion of colloid, the peelable layer can be removed, thereby extending the service life of the filter element.

[0037] (3) The water purification system of the present invention uses a filter element assembly that can remove chlorine from raw water, and also uses a non-chlorine removal filter element that retains chlorine in raw water, and the two filter elements are used in parallel. For part of the raw water, the chlorine is removed, and for the rest of the raw water, the chlorine is retained. The present invention can adjust the chlorine content in the final purified water by controlling the ratio of the two parallel filter elements, thereby avoiding the chlorine in the final purified water being completely removed or completely retained. Compared with the prior art of using a carbon canister to completely remove chlorine from raw water, the present invention not only reduces pollution during filter element replacement, but also can flexibly adjust the ratio of the filter element assembly and the non-chlorine removal filter element according to water use conditions, distance from the water plant, etc., thereby flexibly adjusting the chlorine content in the purified water. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a cross-sectional view of a filter element in the prior art;

[0039] Figure 2 It is a partial cross-sectional view of a filter element in the prior art;

[0040] Figure 3 It is an exploded view of the filter element without showing the housing in the prior art;

[0041] Figure 4 This is a schematic diagram of the first filter layer, the activated carbon fiber layer, and the second filter layer in a composite filter element in an embodiment of the present application;

[0042] Figure 5 This is a three-dimensional schematic diagram of an embodiment of the present application in which the activated carbon fiber is arranged in the transition filter layer;

[0043] Figure 6 This is a schematic diagram of a composite filter element when the activated carbon fiber is arranged in the transition filter layer in one embodiment of the present application;

[0044] Figure 7 This is a schematic diagram of a composite filter element when antiscalant or antibacterial agent particles are dispersed on an activated carbon fiber layer in one embodiment of the present application;

[0045] Figure 8 This is a schematic diagram of a scale inhibitor or antibacterial agent particle being wrapped by an activated carbon fiber layer in one embodiment of the present application;

[0046] Fig. 9 This is a schematic diagram of an embodiment of the present application in which the second filter layer and the peelable layer are separately provided and both are provided with closed ends;

[0047] Fig.10 This is a cross-sectional view of a filter element assembly in one embodiment of the present application.

[0048] Fig.11 This is a schematic diagram of a water purification system in one embodiment of the present application.

[0049] Explanation of the symbols in the schematic diagram:

[0050] Central tube 101;

[0051] A first filter layer 102;

[0052] Transition filter layer 103;

[0053] A second filter layer 104;

[0054] Activated carbon fiber 105;

[0055] Activated carbon fiber layer 106;

[0056] Antiscalant or antibacterial agent granules 107;

[0057] The first closing point 201;

[0058] Cut line 202;

[0059] A peelable layer 203;

[0060] The second closing part 204;

[0061] Housing 301;

[0062] End cap 1 302;

[0063] End cap two 303;

[0064] Clean water outlet 304;

[0065] Raw water import 306;

[0066] Cover II 307;

[0067] Cover body 308. DETAILED DESCRIPTION

[0068] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the drawings and embodiments.

[0069] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of implementation. The change or adjustment of their relative relationship should also be regarded as the scope of implementation of the utility model without substantial change of the technical content.

[0070] In one embodiment, the utility model provides a composite filter element, including a first filter layer 102, an activated carbon fiber layer 106, and a second filter layer 104 wound on a central tube 101 from the inside to the outside. The first filter layer 102 and the second filter layer 104 can be the same filter layer, that is, an integrated design. The first filter layer 102 and the second filter layer 104 can also be different filter layers, that is, a split design.

[0071] Antiscalant or antibacterial agent particles 107 are spread on the activated carbon fiber layer 106. When the activated carbon fiber layer 106 is rolled, the antiscalant or antibacterial agent particles 107 are trapped in the activated carbon fiber layer 106.

[0072] In one embodiment, the utility model provides a composite filter element, such as Figure 4 As shown, it includes a first filter layer 102 , an activated carbon fiber layer 106 , and a second filter layer 104 which are sequentially wound on a central tube 101 from the inside to the outside, wherein the filtering accuracy of the second filter layer 104 is lower than that of the first filter layer 102 and the activated carbon fiber layer 106 .

[0073] The filtering accuracy of the first filter layer 102 may be smaller than that of the activated carbon fiber layer 106 , and the first filter layer 102 may intercept the fallen fibers.

[0074] In addition, the filtering accuracy of the first filter layer 102 may also be greater than that of the activated carbon fiber layer 106 .

[0075] Each filter layer forms a different filtering gradient, thereby ensuring the filtering accuracy of the filter element while improving the filter element's dirt holding capacity and extending the filtering life. The first filter layer 102 of the inner circle has a higher filtering accuracy and can intercept the black fibers dropped by the activated carbon fiber. The outer circle uses the second filter layer 104 with a lower filtering accuracy to prevent the colloid from sticking to the surface of the activated carbon fiber and affecting the adsorption performance.

[0076] In this embodiment, the first filter layer 102 and the second filter layer 104 may be non-woven fabrics or other materials, which are relatively mature in the prior art and will not be described in detail here.

[0077] In one embodiment, if Figure 5-6 As shown, the activated carbon fiber layer 106 is made of a transition filter layer 103 and activated carbon fibers 105 disposed on the transition filter layer 103, which is relatively mature in the prior art and will not be described in detail herein.

[0078] In this embodiment, in order to prevent the activated carbon fibers 105 from being broken during the winding process, the activated carbon fibers 105 need to be disposed on a transition filter layer 103 having a certain strength.

[0079] The transition filter layer 103 is used to connect the first filter layer 102 and the second filter layer 104 .

[0080] In an optional embodiment, the second filter layer 104 and the transition filter layer 103 can be separately arranged, that is, the second filter layer 104 and the transition filter layer 103 are not the same filter layer, and the filtering accuracy of the second filter layer 104 is less than the filtering accuracy of the transition filter layer 103, thereby forming different filtering gradients.

[0081] In another optional embodiment, the second filter layer 104 is integrally arranged with the transition filter layer 103 , that is, the second filter layer 104 and the transition filter layer 103 are the same filter layer, and the filtering accuracy of the second filter layer 104 is the same as that of the transition filter layer 103 .

[0082] The transition filter layer 103 may be a part of the first filter layer 102 , that is, located at the end of the first filter layer 102 .

[0083] The transition filter layer 103 may also be a part of the second filter layer 104 , that is, located at the beginning of the second filter layer 104 .

[0084] The transition filter layer 103 may also be a single filter layer, that is, it is not integrated with the first filter layer 102 and the second filter layer 104 , and is wound after the first filter layer 102 and before the second filter layer 104 .

[0085] In one embodiment, in order to prevent the activated carbon fiber layer 106 from being broken during the winding process, the activated carbon fiber layer 106 needs to have a certain strength, so the activated carbon fiber layer 106 is a coated activated carbon fiber or activated carbon paper. In this case, the activated carbon fiber layer 106 is directly wound after the first filter layer 102 is wound, and then the second filter layer 104 is wound.

[0086] In one embodiment, the composite filter element further includes a peelable layer 203, which is wound around the outside of the second filter layer 104 and can be removed from the second filter layer 104. When the peelable layer 203 is clogged due to adhesion of colloid, the peelable layer 203 can be removed, thereby extending the service life of the composite filter element.

[0087] In one embodiment, if Fig. 9 As shown, the second filter layer 104 has a first closing portion 201 at its end. The second filter layer 104 and the peelable layer 203 are arranged separately, that is, the second filter layer 104 and the peelable layer 203 are not the same filter layer. After the second filter layer 104 is closed, it is cut along the cutting line 202 and then wound 1-10 times to form the peelable layer 203.

[0088] In this embodiment, the end of the peelable layer 203 can be closed by the second closing part 204, or other methods can be used to prevent the peelable layer 203 from spreading.

[0089] The peelable layer 203 is not limited to the above-mentioned configuration. The peelable layer 203 can be connected to the second filter layer 104 through an easy-tear line. When the peelable layer 203 is blocked by the colloid, the peelable layer 203 can be torn off through the easy-tear line. This is relatively mature in the prior art and will not be repeated here.

[0090] The closing methods of the first closing part 201 and the second closing part 204 can be any one of heat pressing closing, glue closing, and ultrasonic welding closing, which is relatively mature in the prior art and will not be described in detail here.

[0091] In one embodiment, if Figure 7-8 As shown, antiscalant or antibacterial agent particles 107 are dispersed on the activated carbon fiber layer 106 , and the antiscalant or antibacterial agent particles 107 are wrapped by the activated carbon fiber layer 106 .

[0092] The scale inhibitor or antibacterial agent is dispersed in granular form on the activated carbon fiber layer 106. The thick, soft and easily deformable activated carbon fiber is utilized to better wrap the scale inhibitor or antibacterial agent particles 107 in the activated carbon fiber without causing deformation of the filter element, thereby preventing the scale inhibitor from leaking and eliminating the need to set up a special space for accommodating the scale inhibitor in the shell or end cover.

[0093] The particle size of the antiscalant or antibacterial agent particles 107 is 0.05-2.0 mm, so that it cannot pass through the first filter layer 102, the activated carbon fiber layer 106, and the second filter layer 104. Too fine powdered antiscalants or antibacterial agents can easily pass through the activated carbon fibers and the filter layer, accumulate on the inner filter layer, and cause the filter element to be blocked, or pass through the inner layer of the composite filter element and become ineffective. For antiscalants or antibacterial agents with too large particle sizes, the thickness of the activated carbon fibers is not enough to compress and wrap, resulting in bulging, which can easily cause the filter element to deform and be difficult to roll.

[0094] In one embodiment, the antiscalant is phosphate particles.

[0095] In one embodiment, the utility model also provides a filter element assembly, such as Fig.10 As shown, it includes a housing 301, an end cap 1 302, and an end cap 2 303, wherein the housing 301 is used to accommodate the above-mentioned composite filter element. The end cap 1 302 is installed at one end of the composite filter element and is sealed and connected to the end of the composite filter element. The end cap 2 303 is installed at the other end of the composite filter element.

[0096] In this embodiment, the second end cap 303 is provided with a raw water inlet 306 which is sealed and connected to the gap, and a clean water outlet 304 which is sealed and connected to the clean water end of the composite filter element. Raw water enters from the raw water inlet 306, is filtered from the outside to the inside by the composite filter element, and the clean water enters the central tube 101 from the through hole provided in the central tube 101, and then flows out from the clean water outlet 304.

[0097] In one embodiment, the end cap 1 302 and the end cap 2 303 are detachably connected to the cover body 1 308 and the cover body 2 307. The cover body 2 307 is provided with joints which are sealed and connected to the raw water inlet 306 and the purified water outlet 304, so as to facilitate connection with a water purifier or other water purification system.

[0098] In one embodiment, the utility model also provides a water purification system, such as Fig.11 As shown, the water purification system includes several filter cartridges and several non-chlorine removal filter cartridges. Since the filter cartridge contains an activated carbon fiber layer 106, the chlorine in the raw water will be removed after being filtered by the filter cartridge. However, the chlorine in the raw water will not be removed after being filtered by the non-chlorine removal filter cartridge, so that the purified water still contains chlorine.

[0099] It should be noted that the non-chlorine removal filter element only needs to be able to retain the chlorine in the raw water. This is relatively mature in the existing technology and will not be elaborated here.

[0100] The water purification system includes a parallel dechlorination filter mechanism and a chlorine-retaining filter mechanism. Part of the raw water is filtered by the dechlorination filter mechanism, and the produced clean water does not contain chlorine. Part of the raw water is filtered by the chlorine-retaining filter mechanism, and the produced clean water retains chlorine. The ratio of clean water without chlorine and clean water with chlorine can be adjusted as needed, so that the chlorine content of the mixed clean water meets the demand.

[0101] In this embodiment, several filter element assemblies are connected in parallel with several non-dechlorination filter elements. After the raw water is filtered by the parallel filter element assemblies and the non-dechlorination filter elements, the clean water produced by the filter element assemblies and the clean water produced by the non-dechlorination filter elements are mixed to form the clean water of the water purification system.

[0102] In one embodiment, for the chlorine-retaining filter mechanism, there are multiple non-chlorine-removing filter elements, and the multiple non-chlorine-removing filter elements are arranged in parallel and / or in series. For the chlorine-removing filter mechanism, there are multiple filter element assemblies, and the multiple filter element assemblies are arranged in parallel and / or in series.

[0103] In another embodiment, there are multiple non-chlorine removal filter elements in the chlorine-retaining filter mechanism, and there is one filter element assembly in the chlorine removal filter mechanism. Alternatively, there is one non-chlorine removal filter element in the chlorine-retaining filter mechanism, and there are multiple filter element assemblies in the chlorine removal filter mechanism.

[0104] When the water use point is close to the water plant, the chlorine content in the raw water is higher. At this time, the number of filter element components in the chlorine removal filter mechanism should be larger, and the number of non-chlorine removal filter elements in the chlorine retention filter mechanism should be smaller. At this time, the clean water produced by the two filter mechanisms is mixed, and the chlorine content in them can meet the usage requirements.

[0105] Similarly, when the water use point is far away from the water plant, the chlorine content in the raw water is low. At this time, the number of filter element components in the chlorine removal filter mechanism should be smaller, while the number of non-chlorine removal filter elements in the chlorine retention filter mechanism should be larger. At this time, the clean water produced by the two filter mechanisms is mixed, and the chlorine content in them can meet the usage requirements.

[0106] When the user wants a lower chlorine content in the water, the number of filter elements in the chlorine removal filter mechanism should be larger, while the number of non-chlorine removal filter elements in the chlorine retention filter mechanism should be smaller. At this time, the clean water produced by the two filter mechanisms is mixed, and the chlorine content therein can meet the usage requirements.

[0107] When the user wants a higher chlorine content in the water, the number of filter elements in the chlorine removal filter mechanism should be smaller, while the number of non-chlorine removal filter elements in the chlorine retention filter mechanism should be larger. At this time, the clean water produced by the two filter mechanisms is mixed, and the chlorine content therein can meet the usage requirements.

[0108] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A composite filter element, characterized in that: It comprises a first filter layer (102), an activated carbon fiber layer (106), and a second filter layer (104) which are sequentially wound on a central tube (101) from the inside to the outside; Antiscalant or antibacterial agent particles (107) are dispersed on the activated carbon fiber layer (106); When the activated carbon fiber layer (106) is rolled, the antiscalant or antibacterial agent particles (107) are trapped in the activated carbon fiber layer (106).

2. The composite filter element according to claim 1, characterized in that: The particle size of the antiscalant or antibacterial agent particles (107) is greater than the filtration accuracy of the first filter layer (102), the activated carbon fiber layer (106), and the second filter layer (104), so that the antiscalant or antibacterial agent particles (107) cannot pass through the first filter layer (102), the activated carbon fiber layer (106), and the second filter layer (104).

3. The composite filter element according to claim 2, characterized in that: The particle size of the antiscalant or antibacterial agent particles (107) is 0.05-2.0 mm.

4. The composite filter element according to claim 1, characterized in that: The filtering accuracy of the second filtering layer (104) is lower than that of the first filtering layer (102) and the activated carbon fiber layer (106).

5. The composite filter element according to claim 4, characterized in that: The activated carbon fiber layer (106) comprises: A transition filter layer (103), the transition filter layer (103) being used to connect the first filter layer (102) and the second filter layer (104); Activated carbon fiber (105), the activated carbon fiber (105) is placed on the transition filter layer (103).

6. The composite filter element according to claim 5, characterized in that: The second filter layer (104) and the transition filter layer are arranged separately, and the filtering accuracy of the second filter layer (104) is lower than the filtering accuracy of the transition filter layer (103).

7. The composite filter element according to claim 5, characterized in that: The second filter layer (104) is integrally arranged with the transition filter layer, and the filtering accuracy of the second filter layer (104) is the same as the filtering accuracy of the transition filter layer (103).

8. The composite filter element according to claim 4, characterized in that: The activated carbon fiber layer (106) is coated activated carbon fiber or activated carbon paper.

9. The composite filter element according to claim 1, characterized in that: It also includes a peelable layer (203), which is wound around the outside of the second filter layer (104) and can be removed from the second filter layer (104).

10. A filter element assembly, characterized in that: include: A housing (301), the housing (301) being used to accommodate the composite filter element as claimed in any one of claims 1 to 9; End cap 1 (302), the end cap 1 (302) is installed at one end of the composite filter element and is sealed and connected to the end of the composite filter element; End cover 2 (303), the end cover 2 (303) is installed at the other end of the composite filter element; The second end cover (303) is provided with: A raw water inlet (306), the raw water inlet (306) being in sealed communication with the gap; A clean water outlet (304) is sealed and connected to the clean water end of the composite filter element.

11. The filter element assembly according to claim 10, characterized in that: The end cover 1 (302) and the end cover 2 (303) are detachably connected to the cover body 1 (308) and the cover body 2 (307), respectively; The second cover body (307) is provided with joints which are respectively sealed and connected with the raw water inlet (306) and the clean water outlet (304).

12. A water purification system, characterized in that: The filter element assembly comprises the filter element assembly as claimed in any one of claims 10 to 11, wherein the chlorine in the raw water is removed after the raw water is filtered through the filter element assembly; It also includes a non-chlorine removal filter element. After the raw water is filtered through the non-chlorine removal filter element, the chlorine in the raw water is retained; The filter element assembly is connected in parallel with the non-dechlorination filter element. After the raw water is filtered by the parallel filter element assembly and the non-dechlorination filter element, the clean water produced by the filter element assembly and the clean water produced by the non-dechlorination filter element are mixed to form the clean water of the water purification system.

13. The water purification system according to claim 12, characterized in that: There are multiple filter element assemblies, and the multiple filter element assemblies are arranged in parallel and / or in series; There are multiple non-chlorine removal filter elements, and the multiple non-chlorine removal filter elements are arranged in parallel and / or in series.

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