Filter element assembly, waterway system and water purifying device

Abstract

The invention discloses a filter element assembly, a waterway system and water purification equipment, and the filter element assembly comprises a filter bottle, a filter cover, a central pipe, a first filter assembly and a second filter assembly; the filter bottle is provided with a containing cavity; the filter bottle is covered by the filter cover; the central pipe is arranged in the containing cavity and divides the containing cavity into a first cavity and a second cavity, and the second cavity is located on the periphery of the first cavity; the first filter assembly comprises a front filter element, a rear filter element and a separator, the separator divides the first cavity into a first filter cavity and a second filter cavity, the front filter element is arranged in the first filter cavity, and the rear filter element is arranged in the second filter cavity; the second filter assembly comprises a reverse osmosis filter element arranged in the second cavity, and the reverse osmosis filter element is arranged on the outer wall face of the center pipe in a sleeving mode. According to the filter element assembly, a new flow path of the filter element assembly with the detachable front filter element is provided.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification devices, and in particular to a filter element component, a water system and a water purification device. Background Art

[0002] As people pursue a better quality of life, the quality of drinking water has begun to attract much attention. Reverse osmosis water purification devices are becoming more and more popular because the purified water they produce is fresher, more hygienic and safer. Integrating the pre-filter element assembly, reverse osmosis filter element assembly and post-filter element assembly into a filtration unit is the development trend of water purification devices in the future. It can reduce the size of the whole water purification device, reduce the space occupied by the water purification device, and realize the miniaturization of the water purification device.

[0003] The pre-filter unit, post-filter unit, and reverse osmosis filter unit of the traditional integrated filter element assembly are all set in the housing and cannot be replaced separately. However, since the life of the reverse osmosis filter unit is often longer than that of the pre-filter unit and the post-filter unit, when the life of the pre-filter unit and the post-filter unit expires, the life of the reverse osmosis filter unit has not expired. At this time, the entire integrated filter element must be replaced, wasting the life of the reverse osmosis unit. When the pre-filter element assembly, the reverse osmosis filter element assembly, and the post-filter element assembly are integrated into a filter unit, and the pre-filter element is detachable, a new water flow path needs to be designed to meet the requirements of filter element integration. Summary of the invention

[0004] The main purpose of the present invention is to propose a filter element assembly, aiming to provide a new flow path of the filter element assembly with a detachable pre-filter element.

[0005] To achieve the above-mentioned purpose, the present invention proposes a filter element assembly, which includes a filter bottle, a filter cover, a center tube, a first filter assembly and a second filter assembly; the filter bottle has a accommodating chamber; the filter cover covers the filter bottle; the center tube is arranged in the accommodating chamber, and the center tube divides the accommodating chamber into a first chamber and a second chamber, and the second chamber is located at the periphery of the first chamber; the first filter assembly includes a pre-filter element, a post-filter element and a partition, the partition is arranged in the first chamber, and divides the first chamber into a first filter chamber and a second filter chamber, the pre-filter element is arranged in the first filter chamber, and the post-filter element is arranged in the second filter chamber; the second filter assembly includes a reverse osmosis filter element, and the reverse osmosis filter element is sleeved on the outer wall surface of the center tube and is located in the second chamber.

[0006] In one embodiment, the filter cover is provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet and a wastewater outlet, the first water inlet and the first water outlet are connected to the first filter chamber, the second water outlet is connected to the second filter chamber, the second water inlet and the wastewater outlet are connected to the second chamber, the central tube is provided with a first water hole, and the second chamber and the second filter chamber are connected through the first water hole; water flowing into the first filter chamber from the first water inlet flows out from the first water outlet after being filtered by the pre-filter element, and water flowing into the second chamber from the second water inlet flows out from the second water outlet after being filtered by the reverse osmosis filter element, one path flows out from the wastewater outlet, and the other path flows to the post-filter element for filtration and flows out from the second water outlet.

[0007] In one embodiment, the partition is sealed and connected to the inner wall of the first chamber, and the second filter chamber is located on the side of the first filter chamber away from the filter cover; the pre-filter element and the inner wall surface of the first filter chamber form a first water flow gap, and the first water flow gap is connected to the first water inlet.

[0008] In one embodiment, the first filter assembly further includes an upper end cover, the pre-filter element is disposed between the upper end cover and the partition, and the upper end and the lower end of the pre-filter element are respectively glued to the upper end cover and the partition.

[0009] In one embodiment, the upper end cover is movably connected to the filter cover.

[0010] In one embodiment, the pre-filter element is configured in a hollow cylindrical shape, a water outlet channel is formed inside the pre-filter element, and the water outlet channel is connected to the first water outlet.

[0011] In one embodiment, the reverse osmosis filter element is arranged in a hollow cylindrical shape, and a second water flow gap is formed between the reverse osmosis filter element and the inner wall surface of the filter bottle, and the second water flow gap is connected to the second water inlet.

[0012] In one embodiment, the second filter assembly further includes a reverse osmosis top cover and a reverse osmosis bottom cover, the reverse osmosis filter element is disposed between the reverse osmosis top cover and the reverse osmosis bottom cover, and the reverse osmosis filter element is glued to the reverse osmosis top cover.

[0013] In one embodiment, the water outlet side of the reverse osmosis filter element is connected to the wastewater outlet and the first water passage hole.

[0014] In one embodiment, the post-filter element is arranged in a hollow cylindrical shape, and the post-filter element and the inner wall surface of the central tube form a third water flow gap, and the third water flow gap is connected to the first water flow hole. The water flowing into the third water flow gap is filtered by the post-filter element and then flows out from the second water outlet.

[0015] In one embodiment, the first filter assembly further includes a water outlet pipe, which is disposed in the water outlet channel, one end of the water outlet pipe is sealed and connected to the second water outlet, and the other end of the water outlet pipe is sealed and connected to the water outlet side of the post-filter element.

[0016] In one embodiment, the partition is arranged in a barrel shape, the post-filter element is arranged in the partition, the peripheral wall of the partition and the cavity wall of the second filter cavity form the third water flow gap, the peripheral wall of the partition is provided with a second water flow hole, and the water flowing into the third water flow gap flows through the second water flow hole and is filtered by the post-filter element.

[0017] In one embodiment, the first filter assembly further includes a lower end cover, the lower end cover is connected to the bottom of the partition, the top of the post filter element is glued to the partition, and the bottom of the post filter element is glued to the lower end cover.

[0018] In one embodiment, the filter cover includes a filter bottle cover and a filter element cover, the filter bottle cover covers the filter bottle, the filter bottle cover is provided with a avoidance port, the avoidance port is arranged corresponding to the first chamber, and the filter element cover is detachably arranged at the avoidance port.

[0019] The present invention also proposes a water system, which includes the above-mentioned filter element assembly. The filter element assembly includes a filter bottle, a filter cover, a central tube, a first filter assembly and a second filter assembly; the filter bottle has a receiving chamber; the filter cover covers the filter bottle; the central tube is arranged in the receiving chamber, and the central tube divides the receiving chamber into a first chamber and a second chamber, and the second chamber is located at the periphery of the first chamber; the first filter assembly includes a pre-filter element, a post-filter element and a partition, and the partition is arranged in the first chamber, and divides the first chamber into a first filter chamber and a second filter chamber, the pre-filter element is arranged in the first filter chamber, and the post-filter element is arranged in the second filter chamber; the second filter assembly includes a reverse osmosis filter element, and the reverse osmosis filter element is sleeved on the outer wall surface of the central tube and is located in the second chamber.

[0020] The present invention also proposes a water purification device, which includes the above-mentioned water system, and the water system includes a filter element assembly. The filter element assembly includes a filter bottle, a filter cover, a central tube, a first filter assembly and a second filter assembly; the filter bottle has a receiving chamber; the filter cover covers the filter bottle; the central tube is arranged in the receiving chamber, and the central tube divides the receiving chamber into a first chamber and a second chamber, and the second chamber is located at the periphery of the first chamber; the first filter assembly includes a pre-filter element, a post-filter element and a partition, and the partition is arranged in the first chamber, and divides the first chamber into a first filter chamber and a second filter chamber, the pre-filter element is arranged in the first filter chamber, and the post-filter element is arranged in the second filter chamber; the second filter assembly includes a reverse osmosis filter element, and the reverse osmosis filter element is sleeved on the outer wall surface of the central tube and is located in the second chamber.

[0021] The technical solution of the present invention is to integrate a pre-filter element, a reverse osmosis filter element and a post-filter element into a filtering unit, and divide the accommodating chamber in the filter bottle into a first chamber and a second chamber by a central tube, wherein the first chamber is further divided into a first filter chamber and a second filter chamber by a partition, the pre-filter element is arranged in the first filter chamber, the post-filter element is arranged in the second filter chamber, the reverse osmosis filter element is arranged in the second chamber, and the filter cover is provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet and a wastewater outlet corresponding to each chamber, and a first water hole is also arranged on the central tube inside the filter bottle. In this way, water flowing into the first filter chamber from the first water inlet flows out from the first water outlet after being filtered by the pre-filter element, and water flowing into the second chamber from the second water inlet flows out from two paths after being filtered by the reverse osmosis filter element, one path flows out from the wastewater outlet, and the other path flows to the post-filter element and flows out from the second water outlet after being filtered. The water channel scheme of the present invention is reasonably designed, and the space utilization rate of the water channel layout inside the filter bottle is high, and it will not take up much space. Therefore, when the overall size of the filter element assembly remains unchanged, the sizes of the internal pre-filter element, post-filter element and reverse osmosis filter element can be made larger, thereby improving the flux of the water channel of the filter element assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of an embodiment of a filter element assembly of the present invention;

[0024] Figure 2for Figure 1 Exploded view of the middle filter element assembly;

[0025] Figure 3 for Figure 1 A cross-sectional view of the middle filter element assembly;

[0026] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0027] Figure 5 for Figure 1 Water flow path diagram of the middle filter element assembly;

[0028] Figure 6 for Figure 3 A cross-sectional view of the middle filter element assembly with the internal structure removed;

[0029] Figure 7 for Figure 2 Exploded view of the middle filter cover assembly;

[0030] Figure 8 It is a schematic structural diagram of the first filter assembly of the present invention;

[0031] Fig. 9 for Figure 8 The enlarged view of point B in the middle;

[0032] Fig.10 for Figure 8 An exploded view of the first filter assembly;

[0033] Fig.11 for Fig.10 Schematic diagram of the structure of the middle filter cover and the filter handle;

[0034] Fig.12 for Figure 8 A cross-sectional view of the first filter assembly;

[0035] Fig.13 is a schematic structural diagram of the second filter assembly of the present invention;

[0036] Fig.14 for Fig.13 An exploded view of the second filter assembly;

[0037] Fig.15 for Fig.13 A cross-sectional view of the second filter assembly.

[0038] Description of Figure Numbers:

[0039]

[0040]

[0041] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0044] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if the meaning of "and / or" appearing in the full text is to include three parallel schemes, taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0045] The present invention provides an embodiment of a filter element assembly, which is used to be installed in a water purification device to filter raw water (ie, tap water) passing through the filter element so that the water quality meets the needs of the user before being used by the user.

[0046] See also Figures 1 to 15The filter element assembly 10 proposed in the present invention includes a filter bottle 100, a first filter assembly 200, a second filter assembly 300, and a filter cover assembly 400; a receiving chamber 110 is formed inside the filter bottle 100, the first filter assembly 200 and the second filter assembly 300 are arranged in the receiving chamber 110, and the first filter assembly 200 is located inside the second filter assembly 300, or the second filter assembly 300 is located inside the first filter assembly 200, or the first filter assembly 200 is located on one side of the second filter assembly 300. It should be noted that the first filter assembly 200 and the second filter assembly 300 are respectively arranged in two independent chambers in the filter bottle 100, that is, a first chamber 111 and a second chamber 112 are formed in the receiving chamber 110, the first filter assembly 200 is arranged in the first chamber 111, and the second filter assembly 300 is arranged in the second chamber 112. The filter bottle 100 is arranged in a barrel shape, and its upper end is an opening, and the filter cover assembly 400 at least covers the opening. The filter cover assembly 400 is provided with at least one water inlet end and at least one water outlet end, and both the at least one water inlet end and the at least one water outlet end are communicated with the accommodating cavity 110 .

[0047] See also Figure 3 and Figure 6 Specifically, the first filter component 200 and the second filter component 300 are both arranged in the accommodating chamber 110 of the filter bottle 100; the first filter component 200 may include a pre-filter element 221, and may also include a post-filter element 222, and may also include a pre-filter element 221 and a post-filter element 222 at the same time. The first filter component 200 will filter out impurities contained in the water and / or improve the taste of the water. The second filter component 300 may include a reverse osmosis filter element 310. The second filter component 300 will filter out various salt ions and other solutes in the water, thereby reducing the concentration of various salt ions and other solutes in the water and reducing the TDS value of the raw water.

[0048] See also Figures 1 to 7The filter cover assembly 400 includes a filter cover 400a, a filter bottle handle 420 and a decorative cover 430. The filter bottle handle 420 is rotatably connected to the filter cover 400a, and the decorative cover 430 covers the filter cover 400a. If the first filter assembly 200 is configured as a detachable structure, the filter cover 400a includes a filter bottle cover 410 and a filter element cover 210. The filter bottle cover 410 is connected to the filter bottle 100 and is configured corresponding to the reverse osmosis filter element 310. The filter element cover 210 is configured corresponding to the pre-filter element 221 and / or the post-filter element 222. The filter cover 400a is provided with a first water inlet 411, a first water outlet 412, a second water inlet 413, a second water outlet 414 and a wastewater outlet 415. Correspondingly, the first water inlet 411 is the raw water inlet, that is, the water inlet connected to the water inlet side of the pre-filter element 221, for raw water to flow in; the first water outlet 412 is the water outlet connected to the water outlet side of the pre-filter element 221, for water filtered by the pre-filter element 221 to flow out; the second water inlet 413 is the water inlet connected to the water inlet side of the reverse osmosis filter element 310, and its water flow flows into the first chamber 111 from the second water inlet 413 after the pressurization of the pump is increased, and is filtered by the reverse osmosis filter element 310; the wastewater outlet 415 is the outlet of the wastewater filtered by the reverse osmosis filter element 310, and is mainly used to allow the wastewater after passing through the reverse osmosis filter element 310 to flow out.

[0049] It should be noted that the second water outlet 414 can be a water outlet connected to the water outlet side of the reverse osmosis filter element 310, or a water outlet connected to the water outlet side of the post filter element 222. When the first filter component 200 only includes the pre-filter element 221, the second water outlet 414 is used as the water outlet of the pure water after being filtered by the reverse osmosis filter element 310, and can be directly connected to the pure water outlet side of the reverse osmosis filter element 310 for pure water to flow out; when the first filter component 200 only includes the post filter element 222, or includes both the pre-filter element 221 and the post filter element 222, the second water outlet 414 is used as the water outlet of the pure water after being filtered by the post filter element 222, and the pure water after being filtered by the reverse osmosis filter element 310 should also flow into the post filter element 222 for re-filtration, and at this time, the second water outlet 414 is connected to the water outlet side of the post filter element 222.

[0050] See also Figure 7Further, filter bottle handle mounting grooves 417 are provided on opposite sides of the filter cover 400a, and the filter bottle handle 420 is generally U-shaped, with filter bottle handle adapters 420a provided at both ends thereof, and the filter bottle handle adapters 420a are provided in the filter bottle handle mounting grooves 417 and are rotatable relative to the filter bottle handle mounting grooves 417, so that the filter bottle handle 420 is rotatable relative to the filter cover 400a, so that the user can directly carry the filter element assembly 10 by the filter bottle handle 420. The decorative cover 430 covers the filter cover 400a, mainly covering the outer wall surfaces of the multiple water flow channels of the filter cover 400a, so as to ensure the consistency of the appearance of the filter element assembly 10.

[0051] See also Figures 8 to 12 The first filter assembly 200 includes a filter element cover 210, a filter element 220, a water outlet pipe 230, a welding sheet 240, an upper end cover 250, a lower end cover 260, a filter element handle 270, and a separator 280. It should be noted that the filter element cover 210 can be configured as an integrated structure with the filter bottle cover 410, so that the first filter assembly 200 does not include a separate filter element cover 210 structure.

[0052] See also Figures 5 to 7 In other embodiments, the first filter assembly 200 is configured as a detachable structure, in which case the filter cover 400a includes a filter bottle cover 410 and a filter element cover 210, the filter element cover 210 is detachably connected to the filter bottle cover 410, the filter bottle cover 410 covers the filter bottle 100, and the filter element cover 210 is configured corresponding to the first filter assembly 200. The filter bottle cover 410 may be provided with an avoidance opening 416, and the filter element cover 210 is configured at the avoidance opening 416 for installation of the first filter assembly 200. The filter element cover 210 is arranged corresponding to the first chamber 111. The filter element cover 210 can be used as an independent component, arranged at the avoidance port 416, and detachably connected to the filter bottle cover 410. When replacing the first filter component 200, it is only necessary to remove the filter element cover 210 and then replace the first filter component 200; or, the filter element cover 210 is used as a part of the first filter component 200, and the filter element cover 210 is connected with the filter element 220. By removing the filter element cover 210, the entire filter element 220 can be directly taken out to achieve the replacement of the first filter component 200. It should be emphasized that the connection between the filter element cover 210 and the filter element 220 can be a direct connection or an indirect connection, such as connecting the filter element cover 210 and the filter element 220 through the upper end cover 250, and there is no specific limitation on this.

[0053] See also Figure 7 and Fig.11, the filter bottle cover 410 is provided with a snap-in groove 418, the filter element cover 210 has a snap-in portion 215, and the snap-in portion 215 is limitedly matched with the snap-in groove 418. Specifically, a snap-in groove 418 is provided on the filter bottle cover 410, and a snap-in portion 215 is provided on the filter element cover 210, and the snap-in portion 215 and the snap-in groove 418 are limitedly matched. Connecting the filter bottle cover 410 and the filter element cover 210 by snapping is convenient and simple, and easy to operate. At the same time, through the limited matching of the snap-in portion 215 and the snap-in groove 418, the position of the filter element cover 210 can also be fixed, so that the flow channel opening of the filter bottle cover 410 and the flow channel opening of the filter element cover 210 can be accurately docked, and a sealed conduction is achieved, which does not affect the water outlet effect of the filter element assembly 10.

[0054] See also Figure 4 and Fig. 9 Furthermore, a sealing ring 500 can be provided at the joint between the flow opening of the filter bottle cover 410 and the flow opening of the filter element cover 210 to ensure the sealing of the flow path. When the filter element cover 210 is installed at the avoidance opening 416 of the filter bottle cover 410, the sealing ring 500 can be elastically deformed to seal the joint between the flow opening of the filter bottle cover 410 and the flow opening of the filter element cover 210, and at the same time, it can also ensure that the filter element cover 210 will not easily shake in the up and down directions relative to the filter bottle cover 410. The material of the sealing ring 500 can be set to rubber or silicone material, of course, it can also be set to other materials, and there is no specific limitation on this.

[0055] See also Figure 4 Furthermore, the connection between the groove wall of the clamping groove 418 and the upper surface of the filter bottle cover 410 is chamfered. This arrangement can play a guiding role when the clamping portion 215 of the filter element cover 210 is clamped into the clamping groove 418 of the filter bottle cover 410. At the same time, the chamfered setting can also play a guiding role when the sealing ring 500 is clamped between the filter bottle cover 410 and the filter element cover 210.

[0056] The filter element cover 210 is sealed and connected to the upper end cover 250, and the filter element 220 is arranged between the upper end cover 250 and the lower end cover 260. The filter element 220 can be a pre-filter element 221, or a post-filter element 222, or can include both the pre-filter element 221 and the post-filter element 222. When the filter element 220 includes both the pre-filter element 221 and the post-filter element 222, the pre-filter element 221 and the post-filter element 222 can be arranged up and down, left and right, or inside and outside, and their specific positions are not limited. The pre-filter element 221 and the post-filter element 222 are separated by the partition 280, so that when the first filter assembly 200 is installed in the water purification equipment for use, the partition 280 and other structures in the filter element assembly 10 are enclosed to form a mutually independent first filter chamber 710 and a second filter chamber 720, and the pre-filter element 221 and the post-filter element 222 are respectively arranged in the first filter chamber 710 and the second filter chamber 720, so that the water flow path through the pre-filter element 221 and the water flow path through the post-filter element 222 do not affect each other.

[0057] When the filter element 220 includes both the pre-filter element 221 and the post-filter element 222, since the pre-filter element 221 is used to filter out most of the impurities in the raw water, the overall volume of the pre-filter element 221 needs to be set larger, and the water passing through the post-filter element 222 has been filtered twice by the pre-filter element 221 and the reverse osmosis filter element 310, and the solute content in the water is already very small, so the overall volume of the post-filter element 222 can be set relatively small, therefore, the pre-filter element 221 and the post-filter element 222 are arranged in the up and down direction, which can ensure the filtering effect of the pre-filter element 221 and the post-filter element 222. Specifically, the pre-filter element 221 is located above the post-filter element 222, that is, the pre-filter element 221 is arranged close to the filter element cover 210, and the post-filter element 222 is arranged on the side of the pre-filter element 221 away from the filter element cover 210.

[0058] See also Figure 3 and Fig.10The pre-filter element 221 and the post-filter element 222 are both hollow cylindrical, wherein one end of the pre-filter element 221 is connected to the upper end cover 250, and the other end is connected to the upper surface of the partition 280. The pre-filter element 221 is connected to the upper end cover 250 and the partition 280 by gluing to prevent the water from flowing out directly through the connection between the pre-filter element 221, the upper end cover 250 and the partition 280 without filtering through the pre-filter element 221. Of course, the pre-filter element 221, the upper end cover 250 and the partition 280 can also be connected in other ways, and there is no specific limitation on this. The partition 280 can be cylindrical, and the post-filter element 222 is arranged in the cylindrical partition 280, and the pre-filter element 221 and the post-filter element 222 are separated by the partition 280. The bottom of the cylindrical partition 280 is an opening, and the opening is used for the post-filter element 222 to be placed in the partition 280, and the opening is sealed by the lower end cover 260. The post-filter element 222 disposed inside the cylindrical partition 280 is respectively glued to the top inside the partition 280 and the lower end cover 260 to prevent the water from flowing out directly through the connection between the post-filter element 222 and the top inside the partition 280 and the lower end cover 260 without being filtered by the post-filter element 222. Of course, the post-filter element 222 and the top inside the partition 280 and the lower end cover 260 can also be connected in other ways, and there is no specific limitation on this.

[0059] See also Figure 3 , the length of the pre-filter element 221 is greater than the length of the post-filter element 222 to ensure the filtering effect of the pre-filter element 221 and the post-filter element 222. Furthermore, the length of the pre-filter element 221 is 2-3 times the length of the post-filter element 222.

[0060] It should be noted that in order to ensure the compactness and miniaturization of the structure of the first filter component 200, since the pre-filter element 221 is arranged in a hollow cylindrical shape and the post-filter element 222 is arranged below the pre-filter element 221, an outlet pipe 230 can be arranged inside the pre-filter element 221. One end of the outlet pipe 230 is connected to the water outlet side of the post-filter element 222, and the other end is connected to the water outlet channel on the filter element cover 210, so that the water inlet channel and the water outlet channel of the first filter component 200 can be integrated on the filter element cover 210, thereby ensuring the compactness of the structure of the first filter component 200 and realizing the miniaturization of the first filter component 200 and the filter element assembly 10 installed with the first filter component 200. In order to ensure the independence of the water outlet flow path of the post-filter element 222 and the water outlet flow path of the pre-filter element 221, the sealing of the two ends of the water outlet pipe 230 can also be ensured by setting a corresponding sealing structure, for example, through two welding plates 240, which are respectively connected to the filter element cover 210 and the partition 280 to form a sealing groove of the seal, and a seal is installed in the sealing groove to limit the position of the seal. At the same time, the two ends of the water outlet pipe 230 are sealed by the sealing effect of the seal.

[0061] See also Figures 8 to 12 Furthermore, the entire first filter component 200 is integrated, the filter element cover 210 is located at the top of the entire first filter component 200, and the filter element cover 210 is connected to the upper end cover 250. The matching method between the filter element cover 210 and the upper end cover 250 can be a sealed connection, a glue connection, or other connection methods. The first filter assembly 200 also includes a filter element handle 270. Filter element handle mounting grooves 214 are provided on opposite sides of the filter element cover 210. The filter element handle 270 is roughly U-shaped, and filter element handle adapter portions 270a are provided at both ends. The filter element handle adapter portions 270a are disposed in the filter element handle mounting groove 214 and are rotatable relative to the filter element handle mounting groove 214, so that the filter element handle 270 is rotatable relative to the filter element cover 210. Considering that the filter element 220, that is, the pre-filter element 221 and / or the post-filter element 222, has a shorter service life than the reverse osmosis filter element 310, when the service life of the filter element 220 expires, the entire first filter assembly 200 can be disassembled from the filter element assembly 10 by lifting the filter element handle 270, which is convenient for users to use.

[0062] See also Figure 7 and Fig.11, the filter element handle installation groove 214 extends along the length direction of the filter element cover 210 to form a sliding space, and the filter element handle adapter 270a can slide in the filter element handle installation groove 214. Further, the filter bottle cover 410 is provided with a limiting groove 419 on opposite sides, and the filter element handle 270 is provided with a limiting platform 270b on opposite sides. The limiting groove 419 and the limiting platform 270b are limited in the upper and lower directions. The filter element handle 270 has a first position in which the limiting platform 270b slides into the limiting groove 419, and a second position in which the limiting platform 270b slides out of the limiting groove 419. Specifically, the filter element handle adapter 270a can slide in the filter element handle installation groove 214. When the user needs to remove and replace the pre-filter element 221, the filter element handle 270 needs to be slid from the first position to the second position first, and then the filter element handle 270 is rotated to be lifted out. When it slides to the first position, the limiting groove 419 and the limiting platform 270b are matched in the upper and lower directions, so that the filter element handle 270 cannot be directly rotated in the upper and lower directions.

[0063] See also Figures 3 to 6 , Figures 13 to 15 The second filter assembly 300 includes a reverse osmosis filter element 310, a central tube 340, a reverse osmosis top cover 320 and a reverse osmosis bottom cover 330. The reverse osmosis filter element 310 is sleeved on the outer wall of the central tube 340, and the reverse osmosis filter element 310 is arranged between the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330. The upper end and the lower end of the reverse osmosis filter element 310 are fixed by the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330. Furthermore, the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 are also provided with a reverse osmosis filter element 310 groove for embedding the end of the reverse osmosis filter element 310; thus, the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 jointly fix the reverse osmosis filter element 310 in the filter bottle 100.

[0064] See also Figures 3 to 5 The second filter assembly 300 is arranged in the accommodating chamber 110, and the accommodating chamber 110 is divided into a first chamber 111 and a second chamber 112 by the central tube 340. The second chamber 112 is located at the periphery of the first chamber 111. Specifically, the central tube 340 is arranged in a hollow cylindrical shape, and the interior of the central tube 340 forms the first chamber 111, and the exterior of the hollow tube forms the second chamber 112. The first filter assembly 200 is arranged in the first chamber 111, and a first water gap 610 is formed between the pre-filter element 221 and the inner wall surface of the central tube 340, and the first water gap 610 is communicated with the first water inlet 411. The second filter assembly 300 is arranged in the second chamber 112, and a second water gap 620 is formed between the reverse osmosis filter element 310 and the inner wall surface of the filter bottle 100, and the second water gap 620 is communicated with the second water inlet 413.

[0065] When the filter element 220 of the first filter component 200 includes a pre-filter element 221 and a post-filter element 222, the partition 280 separates the first chamber 111 into a first filter chamber 710 and a second filter chamber 720 that are independent of each other. The pre-filter element 221 is placed in the first filter chamber 710, and the post-filter element 222 is placed in the second filter chamber 720 to ensure that the water flow path through the pre-filter element 221 and the water flow path through the post-filter element 222 do not interfere with each other. Furthermore, a first water passage hole 340a can be opened at a position of the central tube 340 corresponding to the second filter chamber 720, so that the pure water filtered by the reverse osmosis filter element 310 can directly flow into the second filter chamber 720 through the second water passage hole 280a, and be filtered again through the post filter element 222, without having to set a separate pipeline between the pure water outlet side of the reverse osmosis filter element 310 and the water inlet side of the post filter element 222, thereby realizing the compactness of the structure of the filter element assembly 10. The first chamber 111 and the second filter chamber 720 are connected by the first water passage hole 340a, and the flow path between the pure water outlet side of the reverse osmosis filter element 310 and the water inlet side of the post filter element 222 is further shortened, thereby improving the water outlet efficiency of the filter element assembly 10.

[0066] See also Fig.10 Further, the partition 280 is barrel-shaped, the post-filter element 222 is disposed in the partition 280, and the peripheral wall of the partition 280 and the inner wall of the first central tube 340 form the third water-passing gap 630; the peripheral wall of the partition 280 is provided with a second water-passing hole 280a, and the first chamber 111 is connected to the second filter cavity 720 through the first water-passing hole 340a and the second water-passing hole 280a. By setting the partition 280 in a barrel shape, it can be ensured that the post-filter element 222 disposed in the barrel-shaped partition 280 is not easily torn when floating up and down under the action of water pressure, thereby affecting the service life of the post-filter element 222.

[0067] The filter element assembly 10 proposed by the present invention has a flow path as follows:

[0068] See also Figure 5The raw water flows into the first water gap 610 through the first water inlet 411, and after being filtered by the pre-filter element 221, flows out from the water outlet channel 221a between the inner wall of the pre-filter element 221 and the outer wall of the outlet pipe 230, and flows out from the first water outlet 412. After being pressurized by the booster pump, the water flowing out of the first water outlet 412 flows into the second water gap 620 through the second water inlet 413, and enters from the side of the reverse osmosis filter element 310 (here, it means that the reverse osmosis filter element 310 adopts a 3D water-saving membrane. If the reverse osmosis filter element 310 adopts a common filter membrane, the water enters from the bottom of the reverse osmosis filter element 310). After being filtered by the reverse osmosis filter element 310, the water flow is divided into two paths: a pure water path and a waste water path. The pure water flows to the post-filter element 222 for re-filtration, and the waste water flows out of the filter element assembly 10 through the waste water outlet 415. Among them, the pure water first flows through the first water hole 340a on the central tube 340 to the third water gap 630, and then flows through the second water hole 280a on the partition 280 to the rear filter element 222 for filtration. The pure water filtered by the rear filter element 222 flows from the inside of the rear filter element 222 to the water outlet pipe 230, and finally flows out from the second water outlet 414 for user use.

[0069] It should be emphasized that if the filter element 220 does not include the post-filter element 222, the pure water filtered by the reverse osmosis filter element 310 directly flows out from the second water outlet 414 for use by the user.

[0070] See also Figures 1 to 15In one embodiment of the present invention, the filter element assembly 10 comprises a filter bottle 100, a filter cover 400a, a central tube 340, a first filter assembly 200 and a second filter assembly 300; the filter bottle 100 has a receiving cavity 110; the filter cover 400a covers the filter bottle 100, and the filter cover 400a is provided with a first water inlet 411, a first water outlet 412, a second water inlet 413, a second water outlet 414 and a wastewater outlet 415; the central tube 340 is arranged in the receiving cavity 110, and the central tube 340 is arranged in the receiving cavity 110. The accommodating chamber 110 is divided into a first chamber 111 and a second chamber 112, wherein the second chamber 112 is located at the periphery of the first chamber 111; the first filter assembly 200 includes a pre-filter element 221, a post-filter element 222 and a separator 280, wherein the separator 280 is disposed in the first chamber 111 and divides the first chamber 111 into a first filter chamber 710 and a second filter chamber 720, wherein the pre-filter element 221 is disposed in the first filter chamber 710, and the post-filter element 222 is disposed in the second filter chamber 720. The filter chamber 720; the second filter assembly 300 includes a reverse osmosis filter element 310, the reverse osmosis filter element 310 is sleeved on the outer wall of the central tube 340, and is located in the second chamber 112; wherein the first water inlet 411 and the first water outlet 412 are connected to the first filter chamber 710, the second water outlet 414 is connected to the second filter chamber 720, the second water inlet 413 and the wastewater outlet 415 are connected to the second chamber 112, and the central tube 340 is provided with a first water hole 340a, The second chamber 112 and the second filter chamber 720 are connected through the first water hole 340a; the water flowing into the first filter chamber 710 from the first water inlet 411 is filtered by the pre-filter element 221 and then flows out from the first water outlet 412; the water flowing into the second chamber 112 from the second water inlet 413 is filtered by the reverse osmosis filter element 310 and then divided into two paths, one path flows out from the wastewater outlet 415, and the other path flows to the post-filter element 222 for filtration and then flows out from the second water outlet 414.

[0071] Specifically, see Figure 5 and Figure 6The filter bottle 100 has a receiving chamber 110 for installing the first filter assembly 200 and the second filter assembly 300. The filter bottle 100 is arranged in a barrel shape, and the filter cover 400a covers one end of the filter bottle 100. The partition 280 divides the first chamber 111 into a first filter chamber 710 and a second filter chamber 720, and the pre-filter element 221 is arranged in the first filter chamber 710, and the post-filter element 222 is arranged in the second filter chamber 720. The two filter chambers are separated by the partition 280 to ensure that the water path flowing through the pre-filter element 221 and the water path flowing through the post-filter element 222 do not interfere with each other. The first filter chamber 710 and the second filter chamber 720 can be arranged horizontally or vertically, as long as they meet the flow path setting. Specifically, in this embodiment, considering the water flow flux in the filter element assembly 10, the water inlet path of the pre-filter element 221, and the filtering effect of the pre-filter element 221, the pre-filter element 221 is arranged above the post-filter element 222, and the volume of the pre-filter element 221 is larger than that of the post-filter element 222, so as to ensure the filtering effect of the first filter assembly 200. The flow path of the filter element assembly 10 is as described above and will not be repeated here.

[0072] See also Figure 3 or Figure 5 In one embodiment, the partition 280 is sealed and connected to the inner wall of the first chamber 111, and the second filter chamber 720 is located on the side of the first filter chamber 710 away from the filter cover 400a; the pre-filter element 221 and the inner wall surface of the first filter chamber 710 form a first water gap 610, and the first water gap 610 is connected to the first water inlet 411.

[0073] Specifically, the partition 280 is sealedly connected to the inner wall of the first chamber 111, that is, the partition 280 is sealedly connected to the inner wall of the central tube 340, so as to divide the first chamber 111 into a first filter chamber 710 and a second filter chamber 720 arranged vertically, and the first filter chamber 710 is located above the second filter chamber 720. The first water gap 610 is connected to the first water inlet 411, and the water flowing into the first filter chamber 710 through the first water inlet 411 will first flow to the first water gap 610, and then flow through the pre-filter element 221 for filtration.

[0074] See also Figure 4 and Fig.10 In one embodiment, the first filter assembly 200 further includes an upper end cover 250, the pre-filter element 221 is disposed between the upper end cover 250 and the partition 280, and the upper end and the lower end of the pre-filter element 221 are glued to the upper end cover 250 and the partition 280 respectively.

[0075] Specifically, by fixing the two ends of the pre-filter element 221 through the upper end cover 250 and the partition 280, the stability of the pre-filter element 221 during use can be ensured. At the same time, since the structure of the lower surface of the filter cover 400a is relatively complex and is not a smooth plane, and the upper end surface of the pre-filter element 221 is a smooth plane, the cooperation between the upper end cover 250 and the pre-filter element 221 can better fix the pre-filter element 221.

[0076] The upper end and the lower end of the pre-filter element 221 are respectively connected to the upper end cover 250 and the partition 280 by gluing, which can prevent the water from not filtering through the pre-filter element 221, but directly flowing through the gap between the pre-filter element 221 and the upper end cover 250, and the gap between the pre-filter element 221 and the partition 280 to the water outlet channel 221a and flowing out, thereby affecting the filtering effect of the pre-filter element 221 on the raw water. Of course, the pre-filter element 221, the upper end cover 250 and the partition 280 can also be connected in other ways, which are not specifically limited.

[0077] See also Figure 4 , further, the upper end cover 250 is movably connected to the filter cover 400a. Specifically, when the filter element assembly 10 is used for the first time, water flows continuously into the first filter chamber 710 from the first water inlet 411, and the dry pre-filter element 221 will sink after the water flows through it. If the upper end cover 250 is connected to the filter cover 400a in a fixed connection, the upper end of the pre-filter element 221 will be fixed, and the pre-filter element 221 will sink due to gravity. In this way, the pre-filter element 221 will be torn and pulled by the downward force on the filter material, thereby damaging the pre-filter element 221 and affecting the life and filtering effect of the pre-filter element 221.

[0078] See also Figure 3 and Fig.10 In one embodiment, the pre-filter element 221 is arranged in a hollow cylindrical shape, and a water outlet channel 221a is formed inside the pre-filter element 221, and the water outlet channel 221a is connected to the first water outlet 412. Specifically, the pre-filter element 221 arranged in a cylindrical shape has an outer wall surface of the pre-filter element 221 as its water inlet side, and an inner wall surface of the pre-filter element 221 as its water outlet side. The filtered water after being filtered by the pre-filter element 221 can flow out of the first water outlet 412 through the hollow water outlet channel 221a inside.

[0079] See also Fig.14 and Fig.15In one embodiment, the reverse osmosis filter element 310 is arranged in a hollow cylindrical shape, and a second water gap 620 is formed between the reverse osmosis filter element 310 and the inner wall surface of the filter bottle 100, and the second water gap 620 is connected with the second water inlet 413. Specifically, the second water gap 620 is connected with the second water inlet 413, and the water flowing into the second chamber 112 through the second water inlet 413 will first flow to the second water gap 620, and then flow through the reverse osmosis filter element 310 for filtration.

[0080] Furthermore, the second filter assembly 300 further includes a reverse osmosis top cover 320 and a reverse osmosis bottom cover 330 , the reverse osmosis filter element 310 is disposed between the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 , and the reverse osmosis filter element 310 is glued to the reverse osmosis top cover 320 .

[0081] Specifically, by fixing the two ends of the reverse osmosis filter element 310 through the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330, the stability of the reverse osmosis filter element 310 during use can be ensured. At the same time, since the structure of the lower surface of the filter cover 400a is relatively complex and is not a smooth plane, and the upper end surface of the reverse osmosis filter element 310 is a smooth plane, the reverse osmosis filter element 310 can be better fixed through the cooperation of the reverse osmosis top cover 320, the reverse osmosis bottom cover 330 and the reverse osmosis filter element 310.

[0082] The upper end and the lower end of the reverse osmosis filter element 310 are respectively connected to the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 by gluing, which can prevent the water from not filtering through the reverse osmosis filter element 310, but directly flowing through the gap between the reverse osmosis filter element 310 and the reverse osmosis top cover 320 to the water outlet channel 221a and flowing out, thereby affecting the filtering effect of the reverse osmosis filter element 310 on water. Of course, the reverse osmosis filter element 310 and the reverse osmosis top cover 320 can also be connected in other ways, which are not specifically limited.

[0083] See also Figure 5 and Fig.14 In one embodiment, the water outlet side of the reverse osmosis filter element 310 is connected to the wastewater outlet 415 and the first water hole 340a. Specifically, the water filtered by the reverse osmosis filter element 310 will be divided into two paths, one of which flows to the wastewater outlet 415, and the other of which has a higher purity and continues to flow to the post-filter element 222 through the first water hole 340a for re-filtration.

[0084] Please refer to 5 and 10. In one embodiment, the post-filter element 222 is arranged in a hollow cylindrical shape. The post-filter element 222 and the inner wall surface of the central tube 340 form a third water gap 630. The third water gap 630 is connected with the first water hole 340a. The water flowing into the third water gap 630 is filtered by the post-filter element 222 and then flows out from the second water outlet 414. Specifically, the third water gap 630 is arranged corresponding to the water inlet side of the post-filter element 222. The water flowing into the third water gap 630 is filtered by the post-filter element 222 and then flows out from the second water outlet 414.

[0085] Furthermore, the first filter assembly 200 also includes a water outlet pipe 230, which is arranged in the water outlet channel 221a, one end of the water outlet pipe 230 is sealed and connected to the second water outlet 414, and the other end of the water outlet pipe 230 is sealed and connected to the water outlet side of the post-filter element 222. Specifically, since the pre-filter element 221 is located above the post-filter element 222, and in order to ensure the compactness and miniaturization of the structure of the first filter assembly 200, the second water outlet 414 is arranged on the filter cover 400a, in order to ensure the independence of the water outlet flow path of the post-filter element 222 and the water outlet flow path of the pre-filter element 221, the sealing of both ends of the water outlet pipe 230 can also be ensured by setting a corresponding sealing structure, for example, by two welding pieces 240, which are respectively connected to the filter cover 400a and the partition 280 to form a sealing groove of the sealing member, and a sealing member is installed in the sealing groove to limit the position of the sealing member, and at the same time, the sealing function of the sealing member seals both ends of the water outlet pipe 230. The water flowing into the third water gap 630 is filtered by the post-filter element 222 and then flows out from the second water outlet 414 through the water outlet pipe 230.

[0086] See also Fig.10 In one embodiment, the partition 280 is barrel-shaped, the post filter element 222 is disposed in the partition 280, the peripheral wall of the partition 280 and the cavity wall of the second filter cavity 720 form the third water gap 630, the peripheral wall of the partition 280 is provided with a second water hole 280a, the water flowing into the third water gap 630 flows through the second water hole 280a and is filtered by the post filter element 222. Further, the first filter assembly 200 further includes a lower end cover 260, the lower end cover 260 is connected to the bottom of the partition 280, the top of the post filter element 222 is glued to the partition 280, and the bottom of the post filter element 222 is glued to the lower end cover 260.

[0087] Specifically, the partition 280 is provided in a cylindrical shape, and the post-filter element 222 is provided in the cylindrical partition 280, and the pre-filter element 221 and the post-filter element 222 are separated by the partition 280. The bottom of the cylindrical partition 280 is an opening, and the opening is used for the post-filter element 222 to be placed in the partition 280, and the opening is sealed by the lower end cover 260. The peripheral wall of the partition 280 is provided with a second water hole 280a, and the pure water filtered by the reverse osmosis filter element 310 will first flow into the third water gap 630 through the first water hole 340a, and then flow from the second water hole 280a to the post-filter element 222 for filtration, and the filtered water filtered by the post-filter element 222 flows out from the second water outlet 414 through the outlet pipe 230 for use by users.

[0088] The top of the post filter element 222 is glued to the partition 280, and the bottom of the post filter element 222 is glued to the lower end cover 260. This arrangement can prevent the water flow from not being filtered through the post filter element 222, but directly flowing through the gap between the post filter element 222 and the top inside the partition 280, and the gap between the post filter element 222 and the lower end cover 260 to the outlet pipe 230 and out through the second water outlet 414, thereby affecting the filtering effect of the post filter element 222 on water. Of course, the post filter element 222 and the top inside the partition 280 and the lower end cover 260 can also be connected in other ways, and there is no specific limitation on this.

[0089] The technical solution of the present invention is to integrate the pre-filter element 221, the reverse osmosis filter element 310 and the post-filter element 222 into a filtering unit, and to divide the accommodating chamber 110 in the filter bottle 100 into a first chamber 111 and a second chamber 112 through a central tube 340, wherein the first chamber 111 is further divided into a first filter chamber 710 and a second filter chamber 720 through a partition 280, the pre-filter element 221 is arranged in the first filter chamber 710, the post-filter element 222 is arranged in the second filter chamber 720, the reverse osmosis filter element 310 is arranged in the second chamber 112, and the filter cover 400a is provided with a first filter element 710 corresponding to each chamber. A water inlet 411, a first water outlet 412, a second water inlet 413, a second water outlet 414 and a wastewater outlet 415. The central tube 340 inside the filter bottle 100 is also provided with a first water hole 340a. In this way, water flowing into the first filter chamber 710 from the first water inlet 411 is filtered by the pre-filter element 221 and then flows out from the first water outlet 412. Water flowing into the second chamber 112 from the second water inlet 413 is filtered by the reverse osmosis filter element 310 and then divided into two paths. One path flows out from the wastewater outlet 415, and the other path flows to the post-filter element 222 and then flows out from the second water outlet 414. The water channel scheme of the present invention is reasonably designed, and the space utilization rate of the internal water channel layout of the filter bottle 100 is high, and it will not take up too much space. Therefore, when the overall size of the filter element assembly 10 remains unchanged, the internal pre-filter element 221, post-filter element 222 and reverse osmosis filter element 310 can be made larger in size, thereby improving the flux of the water channel of the filter element assembly 10.

[0090] The present invention also provides a waterway system, which includes the filter element assembly. The specific structure of the filter element assembly refers to the above embodiment. Since the waterway system adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0091] The present invention also proposes a water purification device, which includes the above-mentioned water system. The specific structure of the water system refers to the above-mentioned embodiment. Since the present water purification device adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here. Among them, the water purification device is a water purifier, a direct drinking machine or a water purifier.

[0092] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A filter element assembly, characterized in that: The filter element assembly comprises: A filter bottle having a receiving cavity; A filter cover, the filter cover covers the filter bottle; a central tube, disposed in the accommodating chamber, wherein the central tube divides the accommodating chamber into a first chamber and a second chamber, wherein the second chamber is located at the periphery of the first chamber; A first filter assembly, comprising a pre-filter element, a post-filter element and a separator, wherein the separator is disposed in the first chamber and divides the first chamber into a first filter chamber and a second filter chamber, the pre-filter element is disposed in the first filter chamber, and the post-filter element is disposed in the second filter chamber; and The second filter assembly includes a reverse osmosis filter element, which is sleeved on the outer wall of the central tube and located in the second chamber.

2. The filter element assembly according to claim 1, characterized in that: The filter cover is provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet and a wastewater outlet, the first water inlet and the first water outlet are connected to the first filter chamber, the second water outlet is connected to the second filter chamber, the second water inlet and the wastewater outlet are connected to the second chamber, the central tube is provided with a first water hole, and the second chamber and the second filter chamber are connected through the first water hole; water flowing into the first filter chamber from the first water inlet flows out from the first water outlet after being filtered by the pre-filter element, and water flowing into the second chamber from the second water inlet flows out from the second water outlet after being filtered by the reverse osmosis filter element, one of which flows out from the wastewater outlet, and the other flows to the post-filter element for filtration and flows out from the second water outlet.

3. The filter element assembly according to claim 2, characterized in that: The partition is sealed and connected to the inner wall of the first chamber, and the second filter chamber is located on the side of the first filter chamber away from the filter cover; the pre-filter element and the inner wall surface of the first filter chamber form a first water flow gap, and the first water flow gap is connected to the first water inlet.

4. The filter element assembly according to claim 3, characterized in that: The first filter assembly further includes an upper end cover, the pre-filter element is disposed between the upper end cover and the partition, and the upper end and the lower end of the pre-filter element are respectively glued to the upper end cover and the partition.

5. The filter element assembly according to claim 4, characterized in that: The upper end cover is movably connected to the filter cover.

6. The filter element assembly according to claim 4, characterized in that: The pre-filter element is arranged in a hollow cylindrical shape, and a water outlet channel is formed inside the pre-filter element, and the water outlet channel is communicated with the first water outlet.

7. The filter element assembly according to claim 6, characterized in that: The reverse osmosis filter element is arranged in a hollow cylindrical shape, and a second water-passing gap is formed between the reverse osmosis filter element and the inner wall surface of the filter bottle, and the second water-passing gap is communicated with the second water inlet.

8. The filter element assembly according to claim 7, characterized in that: The second filter assembly further includes a reverse osmosis top cover and a reverse osmosis bottom cover, the reverse osmosis filter element is arranged between the reverse osmosis top cover and the reverse osmosis bottom cover, and the reverse osmosis filter element is glued to the reverse osmosis top cover.

9. The filter element assembly according to claim 8, characterized in that: The water outlet side of the reverse osmosis filter element is communicated with the wastewater outlet and the first water passage hole.

10. The filter element assembly according to claim 8, characterized in that: The post-filter element is arranged in a hollow cylindrical shape, and the post-filter element and the inner wall surface of the central tube form a third water flow gap, and the third water flow gap is connected with the first water flow hole. The water flowing into the third water flow gap is filtered by the post-filter element and then flows out from the second water outlet.

11. The filter element assembly according to claim 10, characterized in that: The first filter assembly also includes a water outlet pipe, which is arranged in the water outlet channel, one end of the water outlet pipe is sealed and connected to the second water outlet, and the other end of the water outlet pipe is sealed and connected to the water outlet side of the post-filter element.

12. The filter element assembly according to claim 11, characterized in that The partition is arranged in a barrel shape, the post-filter element is arranged in the partition, the peripheral wall of the partition and the cavity wall of the second filter cavity form the third water flow gap, the peripheral wall of the partition is provided with a second water flow hole, and the water flowing into the third water flow gap flows through the second water flow hole and is filtered by the post-filter element.

13. The filter element assembly according to claim 12, characterized in that: The first filter assembly also includes a lower end cover, which is connected to the bottom of the partition, the top of the post-filter element is glued to the partition, and the bottom of the post-filter element is glued to the lower end cover.

14. The filter element assembly according to any one of claims 1 to 13, characterized in that: The filter cover comprises a filter bottle cover and a filter element cover, the filter bottle cover covers the filter bottle, the filter bottle cover is provided with an escape port, the escape port is arranged corresponding to the first chamber, and the filter element cover is detachably arranged at the escape port.

15. A waterway system, characterized in that: Comprising a filter element assembly as described in any one of claims 1 to 14.

16. A water purification device, characterized in that: Comprising the waterway system as claimed in claim 15.

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