Filter element assembly and water purifying device

Abstract

The invention discloses a filter element assembly and a water purifying device, and the filter element assembly comprises a filter bottle, a filter bottle cover, a reverse osmosis filter assembly and a front filter assembly; the filter bottle is provided with a containing cavity; the filter bottle cap covers the filter bottle, and the filter bottle cap is provided with an avoiding opening; the reverse osmosis filter assembly is arranged in the filter bottle and comprises a central pipe and a reverse osmosis filter element, the central pipe divides the containing cavity into a first cavity and a second cavity, the second cavity is located on the periphery of the first cavity, the outer wall face of the central pipe is sleeved with the reverse osmosis filter element, and the reverse osmosis filter element is located in the second cavity; an opening is formed in one end of the central pipe, and the opening corresponds to the avoiding opening; the front filtering assembly is detachably arranged in the second cavity through the receding opening. The filter element assembly provided by the invention can solve the technical problems that the front filter element in the filter element assembly is inconvenient to replace and the replacement efficiency is low.

Description

Technical Field

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

[0002] As people pursue the quality of life, the quality of drinking water has begun to attract attention. Reverse osmosis water purification devices are becoming more and more popular because the purified water they produce is fresher, more hygienic and safer. Tap water has a high content of soluble solids. Under the action of the booster pump, the reverse osmosis filter element can block a large number of ions in the raw water in front of the reverse osmosis membrane, so that the soluble solids of the water passing through the reverse osmosis membrane meet the standards for direct drinking water. The integration and compounding of the filter elements of existing water purification devices is the development trend of water purification devices in the future. Integrating the pre-filter element, the reverse osmosis filter element and the post-filter element into a filtering unit can reduce the size of the whole water purification device, reduce the occupied space of the water purification device, and realize the miniaturization of the water purification device. Since the life of the pre-filter element is usually lower than that of the reverse osmosis filter element, the pre-filter element needs to be replaced frequently to ensure the filtering effect of the pre-filter element. However, in the current integrated filter element assembly, the pre-filter element is usually integrated with the reverse osmosis filter element. The pre-filter element is troublesome to replace. It is usually necessary to disassemble the housing of the filter assembly for replacement, which is very inconvenient and has low replacement efficiency. Summary of the invention

[0003] The main purpose of the present invention is to provide a filter element assembly, aiming to solve the technical problems of inconvenient replacement of the pre-filter element in the filter element assembly and low replacement efficiency.

[0004] To achieve the above-mentioned purpose, the present invention proposes a filter element assembly, which includes a filter bottle, a filter bottle cover, a reverse osmosis filter assembly and a pre-filter assembly; the filter bottle has a accommodating chamber; the filter bottle cover covers the filter bottle, and the filter bottle cover is provided with an escape port; the reverse osmosis filter assembly is arranged in the filter bottle, the reverse osmosis filter assembly includes a central tube and a reverse osmosis filter element, the central tube divides the accommodating chamber into a first chamber and a second chamber, the second chamber is located at the outer periphery of the first chamber, the reverse osmosis filter element is sleeved on the outer wall surface of the central tube, and is located in the second chamber, one end of the central tube is open, and the open port is arranged corresponding to the escape port; the pre-filter assembly is detachably arranged in the second chamber through the escape port.

[0005] In one embodiment, the pre-filter assembly includes a filter element cover and a pre-filter element, the filter element cover is detachably disposed at the avoidance port, and the pre-filter element is disposed in the central tube.

[0006] In one embodiment, the filter element cover is provided with a first water inlet and a first water outlet, the pre-filter element is provided in a hollow cylindrical shape, the first water inlet is connected to the water inlet side of the pre-filter element, and the first water outlet is connected to the water outlet side of the pre-filter element.

[0007] In one embodiment, the filter bottle cover is further provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet and a wastewater outlet, and the filter element cover is also provided with a second water outlet, the first water inlet and the first water inlet are sealed and connected, the first water outlet and the first water outlet are sealed and connected, the second water outlet and the second water outlet are sealed and connected, the second water inlet is connected to the water inlet side of the reverse osmosis filter element, the second water outlet is connected to the water outlet side of the reverse osmosis filter element, and the wastewater outlet is connected to the water outlet side of the reverse osmosis filter element.

[0008] In one embodiment, the pre-filter assembly further includes an upper end cover and a lower end cover, the upper end cover is sealingly connected to the filter element cover, and the pre-filter element is disposed between the upper end cover and the lower end cover.

[0009] In one embodiment, the pre-filter element is glued to the upper end cover and the lower end cover.

[0010] In one embodiment, the filter bottle cover is provided with a snap-fitting groove, and the filter element cover has a snap-fitting portion, and the snap-fitting portion is limitedly matched with the snap-fitting groove.

[0011] In one embodiment, the connection between the groove wall of the snap-fit ​​groove and the upper surface of the filter bottle cover is chamfered.

[0012] In one embodiment, the pre-filter assembly further includes a filter element handle, and the filter element handle is rotatably connected to the filter element cover.

[0013] In one embodiment, filter element handle mounting grooves are provided on opposite sides of the filter element cover, and filter element handle adapters are provided at both ends of the filter element handle, and the filter element handle adapters are rotatably provided in the filter element handle mounting grooves.

[0014] In one embodiment, the filter element handle installation groove extends along the length direction of the filter element cover to form a sliding space, and the filter element handle adapter portion can slide in the filter element handle installation groove.

[0015] In one embodiment, limiting grooves are provided on opposite sides of the filter bottle cover, and limiting platforms are provided on opposite sides of the filter element handle. The limiting grooves and the limiting platforms cooperate in limiting positions in the upper and lower directions, and the filter element handle has a first position in which the limiting platform slides into the limiting groove, and a second position in which the limiting platform slides out of the limiting groove.

[0016] In one embodiment, the filter element handle is arranged in a U shape, and the inner wall surface of the filter element handle at least abuts against a portion of the outer wall surface of the filter element cover.

[0017] In one embodiment, the upper surface of the filter element handle is flush with the upper surface of the filter element cover.

[0018] In one embodiment, a notch groove is provided at one end of the filter element cover away from the clamping portion.

[0019] The present invention also proposes a water purification device, which includes the filter element assembly. The filter element assembly includes a filter bottle, a filter bottle cover, a reverse osmosis filter assembly and a pre-filter assembly; the filter bottle has a accommodating chamber; the filter bottle cover covers the filter bottle, and the filter bottle cover is provided with an escape port; the reverse osmosis filter assembly is arranged in the filter bottle, and the reverse osmosis filter assembly includes a central tube and a reverse osmosis filter element, the central tube divides the accommodating chamber into a first chamber and a second chamber, the second chamber is located at the outer periphery of the first chamber, the reverse osmosis filter element is sleeved on the outer wall surface of the central tube, and is located in the second chamber, one end of the central tube is open, and the open port is arranged corresponding to the escape port; the pre-filter assembly is detachably arranged in the second chamber through the escape port.

[0020] The technical solution of the present invention is to set a avoidance port on the filter bottle cover, and to separate the accommodating chamber in the filter bottle into a first chamber and a second chamber through a central tube. The first chamber is formed inside the central tube, and the central tube is barrel-shaped, and the opening of the central tube is set corresponding to the avoidance port. The pre-filter assembly is detachably set in the central tube through the avoidance port. Such a setting can facilitate the replacement of the pre-filter element in the pre-filter assembly, and the operation is simple, and there is no need to disassemble the filter bottle or filter bottle cover of the filter assembly, thereby improving the replacement efficiency of the pre-filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] 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.

[0022] Figure 1 It is a structural schematic diagram of an embodiment of a filter element assembly of the present invention;

[0023] Figure 2 for Figure 1 Exploded view of the middle filter element assembly;

[0024] Figure 3 for Figure 1A cross-sectional view of the middle filter element assembly;

[0025] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0026] Figure 5 for Figure 1 Water flow path diagram of the middle filter element assembly;

[0027] Figure 6 for Figure 3 A cross-sectional view of the middle filter element assembly with the internal structure removed;

[0028] Figure 7 for Figure 2 Exploded view of the middle filter cover assembly;

[0029] Figure 8 It is a schematic structural diagram of the pre-filter assembly 200 of the present invention;

[0030] Fig. 9 for Figure 8 The enlarged view of point B in the middle;

[0031] Fig.10 for Figure 8 An exploded view of the middle pre-filter assembly 200;

[0032] Fig.11 for Fig.10 Schematic diagram of the structure of the middle filter cover and the filter handle;

[0033] Fig.12 for Figure 8 A cross-sectional view of the middle pre-filter assembly 200;

[0034] Fig.13 for Fig.12 Enlarged view of point C in the middle;

[0035] Fig.14 is a schematic structural diagram of a reverse osmosis filtration assembly 300 of the present invention;

[0036] Fig.15 for Fig.14 An exploded view of the reverse osmosis filter assembly 300;

[0037] Fig.16 for Fig.14 FIG. 4 is a cross-sectional view of a reverse osmosis filtration assembly 300 .

[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 users before being used by the users.

[0046] See also Figures 1 to 16The filter element assembly 10 proposed in the present invention includes a filter bottle 100, a pre-filter assembly 200, a reverse osmosis filter assembly 300, and a filter cover assembly 400; a receiving chamber 110 is formed inside the filter bottle 100, the pre-filter assembly 200 and the reverse osmosis filter assembly 300 are arranged in the receiving chamber 110, and the pre-filter assembly 200 is located inside the reverse osmosis filter assembly 300, or the reverse osmosis filter assembly 300 is located inside the pre-filter assembly 200, or the pre-filter assembly 200 is located on one side of the reverse osmosis filter assembly 300. It should be noted that the pre-filter assembly 200 and the reverse osmosis 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 pre-filter assembly 200 is arranged in the first chamber 111, and the reverse osmosis filter assembly 300 is arranged in the second chamber 112. The filter bottle 100 is barrel-shaped, with an opening at the upper end, 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 the at least one water inlet end and the at least one water outlet end are both connected to the accommodating chamber 110.

[0047] See also Figure 3 and Figure 6 Specifically, the pre-filter component 200 and the reverse osmosis filter component 300 are both arranged in the accommodating chamber 110 of the filter bottle 100; the pre-filter component 200 includes a pre-filter element 221, and the pre-filter component 200 will filter out impurities contained in the water, and the reverse osmosis filter component 300 includes a reverse osmosis filter element 310, and the reverse osmosis 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 bottle cover 410, a filter bottle handle 420 and a decorative cover 430. The filter bottle handle 420 is rotatably connected to the filter bottle cover 410, and the decorative cover 430 covers the filter bottle cover 410. The filter bottle cover 410 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. When the pre-filter component 200 includes a 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; of course, in other embodiments, a post-filter component can also be provided, including a post-filter element 222, and the second water outlet 414 is used as the water outlet of the pure water after being filtered by the post-filter element 222. 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 7 Further, filter bottle handle mounting grooves 417 are provided on opposite sides of the filter bottle cover 410, 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 bottle cover 410, 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 bottle cover 410, mainly covering the outer wall surfaces of the multiple water flow channels of the filter bottle cover 410, so as to ensure the consistency of the appearance of the filter element assembly 10.

[0051] See also Figures 8 to 13The pre-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. The filter element cover 210 is sealed and connected to the upper end cover 250, the filter element 220 is arranged between the upper end cover 250 and the lower end cover 260, and the filter element 220 is a pre-filter element 221. When the filter element assembly 10 also includes a 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 pre-filter assembly 200 is installed in a water purification device for use, the partition 280 and other structures in the filter element assembly 10 are enclosed to form a first filter chamber and a second filter chamber that are independent of each other, and the pre-filter element 221 and the post-filter element 222 are respectively arranged in the first filter chamber and the second filter chamber, 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] It should be noted that in order to ensure the compactness and miniaturization of the structure of the pre-filter assembly 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 outlet channel on the filter element cover 210, so that the water inlet channel and the outlet channel of the pre-filter assembly 200 can be integrated on the filter element cover 210, thereby ensuring the compactness of the structure of the pre-filter assembly 200 and realizing the miniaturization of the pre-filter assembly 200 and the filter element assembly 10 equipped with the pre-filter assembly 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.

[0056] See also Figures 8 to 13 Furthermore, the entire pre-filter assembly 200 is integrated, the filter element cover 210 is located at the top of the entire pre-filter assembly 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 pre-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 arranged 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 pre-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.

[0057] See also Figures 5 to 7Furthermore, the filter bottle cover 410 may be provided with an escape port 416, and the filter element cover 210 is provided at the escape port 416 for installation of the pre-filter assembly 200. The filter element cover 210 is provided corresponding to the first chamber 111, and the filter element cover 210 may be provided at the escape port 416 as an independent component, and be detachably connected to the filter bottle cover 410. When replacing the pre-filter assembly 200, it is only necessary to remove the filter element cover 210, and then replace the pre-filter assembly 200; or, the filter element cover 210 is used as a part of the pre-filter assembly 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 replacement of the pre-filter assembly 200. It should be emphasized that the connection method between the filter element cover 210 and the filter element 220 can be a direct connection method or an indirect connection method, for example, the filter element cover 210 and the filter element 220 are connected through the upper end cover 250, and there is no specific limitation on this.

[0058] See also Figures 3 to 6 , Figures 14 to 16 The reverse osmosis filtration component 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.

[0059] See also Figures 3 to 5 The reverse osmosis 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 pre-filter assembly 200 is arranged in the first chamber 111, and a first water-passing gap 610 is formed between the pre-filter element 221 and the inner wall surface of the central tube 340, and the first water-passing gap 610 is communicated with the first water inlet 411. The reverse osmosis filter assembly 300 is arranged in the second chamber 112, and a second water-passing 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-passing gap 620 is communicated with the second water inlet 413.

[0060] When the filter element 220 of the pre-filter assembly 200 includes a pre-filter element 221 and a post-filter element 222, the partition 280 divides the first chamber 111 into a first filter chamber and a second filter chamber that are independent of each other, the pre-filter element 221 is placed in the first filter chamber, and the post-filter element 222 is placed in the second filter chamber 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, so that the pure water filtered by the reverse osmosis filter element 310 can directly flow into the second filter chamber 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 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.

[0061] 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 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.

[0062] The filter element assembly 10 proposed by the present invention has a flow path as follows:

[0063] 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.

[0064] 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.

[0065] See also Figures 1 to 7 In one embodiment of the present invention, the filter element assembly 10 includes a filter bottle 100, a filter bottle cover 410, a reverse osmosis filtration assembly 300 and a pre-filter assembly 200; the filter bottle cover 410 covers the filter bottle 100, and the filter bottle cover 410 is provided with an escape port 416; the reverse osmosis filtration assembly 300 is arranged in the filter bottle 100, the reverse osmosis filtration assembly 300 includes a central tube 340 and a reverse osmosis filter element 310, the reverse osmosis filter element 310 is sleeved on the outer wall surface of the central tube 340, one end of the central tube 340 is open 341, and the open port 341 is arranged corresponding to the escape port 416; the pre-filter assembly 200 is detachably arranged in the central tube 340 through the escape port 416.

[0066] Specifically, the filter bottle 100 has a receiving chamber 110 formed inside, the pre-filter assembly 200 and the reverse osmosis filter assembly 300 are arranged in the receiving chamber 110, the central tube 340 divides the receiving chamber 110 into a first chamber 111 and a second chamber 112, and the avoidance opening 416 on the filter bottle cover 410 is arranged corresponding to the open opening 341 of the central tube 340. The first chamber 111 is formed inside the central tube 340, and the second chamber 112 is formed outside the central tube 340, and the pre-filter assembly 200 is detachably arranged in the central tube 340 through the avoidance opening 416.

[0067] 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 pre-filter assembly 200, it is only necessary to remove the filter element cover 210 and then replace the pre-filter assembly 200; or, the filter element cover 210 is connected with the pre-filter element 221. By removing the filter element cover 210, the entire pre-filter element 221 can be directly taken out to achieve the replacement of the pre-filter assembly 200. It should be emphasized that the connection between the filter element cover 210 and the pre-filter element 221 can be a direct connection or an indirect connection, such as connecting the filter element cover 210 and the pre-filter element 221 through the upper end cover 250, and there is no specific limitation on this.

[0068] The technical solution of the present invention is to provide a avoidance opening 416 on the filter bottle cover 410, and to separate the accommodating chamber 110 in the filter bottle 100 into a first chamber 111 and a second chamber 112 through the central tube 340. The first chamber 111 is formed inside the central tube 340, and the central tube 340 is provided in a barrel shape, and the opening 341 of the central tube 340 is provided corresponding to the avoidance opening 416. The pre-filter assembly 200 is detachably provided in the central tube 340 through the avoidance opening 416. Such a configuration can facilitate the replacement of the pre-filter element 221 in the pre-filter assembly 200, and the operation is simple, and there is no need to disassemble the filter bottle 100 or the filter bottle cover 410 and other components of the filter assembly, thereby improving the replacement efficiency of the pre-filter element 221.

[0069] See also Figures 8 to 13 In one embodiment, the pre-filter assembly 200 includes a filter element cover 210 and a pre-filter element 221 , the filter element cover 210 is detachably disposed at the avoidance port 416 , and the pre-filter element 221 is disposed in the central tube 340 .

[0070] Specifically, 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 pre-filter assembly 200, it is only necessary to remove the filter element cover 210 and then replace the pre-filter assembly 200.

[0071] See also Fig. 9In one embodiment, the filter cover 210 is provided with a first water inlet 211 and a first water outlet 212, the pre-filter 221 is provided in a hollow cylindrical shape, the first water inlet 211 is communicated with the water inlet side of the pre-filter 221, and the first water outlet 212 is communicated with the water outlet side of the pre-filter 221. Specifically, raw water can flow into the second chamber 112 from the first water inlet 211, and flow out from the first water outlet 212 after being filtered by the pre-filter 221.

[0072] See also Figure 1 , Figure 2 , Figure 7 and Fig. 9 In one embodiment, the filter bottle cover 410 is further 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, and the filter element cover 210 is also provided with a second water outlet 213, the first water inlet 211 and the first water inlet 411 are sealed and connected, the first water outlet 212 and the first water outlet 412 are sealed and connected, the second water outlet 213 and the second water outlet 414 are sealed and connected, the second water inlet 413 is connected to the water inlet side of the reverse osmosis filter element 310, the second water outlet 414 is connected to the water outlet side of the reverse osmosis filter element 310, and the wastewater outlet 415 is connected to the water outlet side of the reverse osmosis filter element 310.

[0073] Specifically, to facilitate the installation of the filter element assembly 10 and the pipeline, the first water inlet 411, the first water outlet 412, the second water inlet 413, the second water outlet 414 and the wastewater outlet 415 for connecting with the pipeline are integrated on the filter bottle cover 410. To facilitate the connection of the pipeline, the first water inlet 411, the first water outlet 412, the second water inlet 413, the second water outlet 414 and the wastewater outlet 415 can be provided with a corresponding adapter 440 for pipeline connection. Since the pre-filter element assembly 200 is detachable relative to the filter bottle 100, a corresponding interface needs to be provided on the filter element cover 210 to form a complete flow path. Specifically, the first water inlet 211 and the first water inlet 411 are sealed and connected, the first water outlet 212 and the first water outlet 412 are sealed and connected, the second water outlet 213 and the second water outlet 414 are sealed and connected, and the second water inlet 413 is connected to the water inlet side of the reverse osmosis filter element 310, the second water outlet 414 is connected to the water outlet side of the reverse osmosis filter element 310, and the wastewater outlet 415 is connected to the water outlet side of the reverse osmosis filter element 310.

[0074] The flow path of the water flow in the filter element assembly 10 is: it flows in from the first water inlet 411, flows through the first water inlet 211 to the pre-filter element 221 for filtration, then flows to the first water outlet 212, and then flows out from the first water outlet 412. The water flowing out from the first water outlet 412 flows in from the second water inlet 413 under the pressure of the booster pump, and is filtered by the reverse osmosis filter element 310 and is divided into two paths, one of which flows out from the wastewater outlet 415, and the other flows from the second water outlet 213 to the second water outlet 414. The waterway scheme of the present invention is reasonably designed, and the space utilization rate of the waterway layout inside the filter bottle 100 is high, and it will not take up much space, so that when the overall size of the filter element assembly 10 remains unchanged, the size of the internal pre-filter element 221 and the reverse osmosis filter element 310 can be made larger, thereby improving the flux of the waterway of the filter element assembly 10.

[0075] Please continue reading Figures 8 to 13 In one embodiment, the pre-filter assembly 200 further includes an upper end cover 250 and a lower end cover 260, wherein the upper end cover 250 is sealedly connected to the filter element cover 210, and the pre-filter element 221 is disposed between the upper end cover 250 and the lower end cover 260. Specifically, the upper end cover 250 and the lower end cover 260 are used to fix the two ends of the pre-filter element 221, so as to ensure the stability of the pre-filter element 221 when in use. At the same time, since the structure of the lower surface of the filter element cover 210 is relatively complex and is not a smooth plane, while 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] Further, the pre-filter element 221 is glued to the upper end cover 250 and the lower end cover 260. Specifically, at this time, since the upper end cover 250 is sealed and connected to the filter element cover 210, and the pre-filter element 221 is glued to the upper end cover 250, the filter element cover 210 and the pre-filter element 221 are indirectly connected together. By removing the filter element cover 210, the entire pre-filter element 221 can be directly taken out to achieve the replacement of the pre-filter assembly 200. The upper end and the lower end of the pre-filter element 221 are respectively connected to the upper end cover 250 and the lower end cover 260 by gluing, which can prevent the water flow from not being filtered by the pre-filter element 221, and directly flowing out through the connection between the pre-filter element 221 and the upper end cover 250 and the lower end cover 260. Of course, the pre-filter element 221 and the upper end cover 250 and the lower end cover 260 can also be connected in other ways, and there is no specific limitation on this.

[0077] If the filter element assembly 10 also includes a post-filter assembly, the post-filter assembly includes a partition 280 and a post-filter element 222, and the pre-filter element 221 is arranged above the post-filter element 222, then at this time, the partition 280 is equivalent to the lower end cover 260 of the pre-filter element 221, and the upper surface of the partition 280 is glued to the lower surface of the pre-filter element 221.

[0078] See also Figure 7 and Fig.11 In one embodiment, the filter bottle cover 410 is provided with a snap-in groove 418, and 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, without affecting the water outlet effect of the filter element assembly 10.

[0079] 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.

[0080] 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.

[0081] See also Figures 8 to 11In one embodiment, the pre-filter assembly 200 further includes a filter element handle 270, and the filter element handle 270 is rotatably connected to the filter element cover 210. Further, filter element handle mounting grooves 214 are provided on opposite sides of the filter element cover 210, and filter element handle adapters 270a are provided at both ends of the filter element handle 270, and the filter element handle adapters 270a are rotatably provided in the filter element handle mounting grooves 214.

[0082] Specifically, the filter element handle 270 is roughly U-shaped, and filter element handle adapter portions 270a are provided at both ends thereof. The filter element handle adapter portion 270a is provided in the filter element handle mounting groove 214 and is 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 pre-filter assembly 200 can be removed from the filter element assembly 10 by lifting the filter element handle 270, which is convenient for users to use.

[0083] See also Figure 7 and Fig.11 In one embodiment, 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 limiting grooves 419 on opposite sides, and the filter element handle 270 is provided with limiting platforms 270b on opposite sides. The limiting grooves 419 and the limiting platforms 270b are matched 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, and then the filter element handle 270 can be rotated before it can be lifted out. When it slides to the first position, the limit groove 419 and the limit platform 270b are limited in the up and down directions, so that the filter element handle 270 cannot be directly rotated in the up and down directions.

[0084] See also Fig.10 In one embodiment, the filter element handle 270 is arranged in a U shape, and the inner wall surface of the filter element handle 270 abuts against at least a portion of the outer wall surface of the filter element cover 210. The inner wall surface of the filter element handle 270 abuts against a portion of the outer wall surface of the filter element cover 210, with a compact layout, a reasonable structure, and reasonable use of space, so that the filter element assembly 10 can be miniaturized.

[0085] See also Fig.12 , further, the upper surface of the filter element handle 270 is flush with the upper surface of the filter element cover 210. Specifically, the upper surface of the filter element handle 270 is flush with the upper surface of the filter element cover 210, ensuring the consistency of the upper surface of the pre-filter assembly 200. It should be noted that the upper surface of the filter element handle 270 is flush with the upper surface of the filter element cover 210, which refers to the state when the filter element handle 270 is in the first position.

[0086] See also Figure 1 and Fig. 9 In one embodiment, a notch 216 is provided at one end of the filter element cover 210 away from the clamping portion 215. The notch 216 is designed to facilitate the user to slide the filter element handle 270 from the first position to the second position and rotate it to lift the entire pre-filter assembly 200.

[0087] The present invention also proposes a water purification device, which includes the above-mentioned filter element assembly. The specific structure of the filter element assembly refers to the above-mentioned embodiment. Since the 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.

[0088] 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 bottle cover, the filter bottle cover covers the filter bottle, and the filter bottle cover is provided with an escape opening; A reverse osmosis filtration assembly is arranged in the filter bottle, the reverse osmosis filtration assembly comprises a central tube and a reverse osmosis filter element, the central tube divides the accommodating chamber into a first chamber and a second chamber, the second chamber is located at the outer periphery of the first chamber, the reverse osmosis filter element is sleeved on the outer wall surface of the central tube and is located in the second chamber, one end of the central tube is open, and the open end is arranged corresponding to the avoidance port; and The pre-filter assembly is detachably arranged in the second chamber through the avoidance opening.

2. The filter element assembly according to claim 1, characterized in that: The pre-filter assembly comprises a filter element cover and a pre-filter element. The filter element cover is detachably arranged at the avoidance port, and the pre-filter element is arranged in the central tube.

3. The filter element assembly according to claim 2, characterized in that: The filter element cover is provided with a first water inlet and a first water outlet. The pre-filter element is provided in a hollow cylindrical shape. The first water inlet is connected to the water inlet side of the pre-filter element, and the first water outlet is connected to the water outlet side of the pre-filter element.

4. The filter element assembly according to claim 3, characterized in that: The filter bottle cover is also provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet and a wastewater outlet, and the filter element cover is also provided with a second water outlet, the first water inlet and the first water inlet are sealed and connected, the first water outlet and the first water outlet are sealed and connected, the second water outlet and the second water outlet are sealed and connected, the second water inlet is connected to the water inlet side of the reverse osmosis filter element, the second water outlet is connected to the water outlet side of the reverse osmosis filter element, and the wastewater outlet is connected to the water outlet side of the reverse osmosis filter element.

5. The filter element assembly according to claim 2, characterized in that: The pre-filter assembly further comprises an upper end cover and a lower end cover, wherein the upper end cover is sealingly connected to the filter element cover, and the pre-filter element is arranged between the upper end cover and the lower end cover.

6. The filter element assembly according to claim 5, characterized in that: The pre-filter element is glued to the upper end cover and the lower end cover.

7. The filter element assembly according to claim 2, characterized in that: The filter bottle cover is provided with a clamping groove, and the filter element cover has a clamping portion, and the clamping portion is limitedly matched with the clamping groove.

8. The filter element assembly according to claim 7, characterized in that: The connection between the groove wall of the clamping groove and the upper surface of the filter bottle cover is chamfered.

9. The filter element assembly according to claim 2, characterized in that: The pre-filter assembly also includes a filter element handle, and the filter element handle is rotatably connected to the filter element cover.

10. The filter element assembly according to claim 9, characterized in that: Filter element handle installation grooves are arranged on opposite sides of the filter element cover, and filter element handle adapters are arranged at both ends of the filter element handle. The filter element handle adapters are rotatably arranged in the filter element handle installation grooves.

11. The filter element assembly according to claim 10, characterized in that: The filter element handle installation groove extends along the length direction of the filter element cover to form a sliding space, and the filter element handle adapter can slide in the filter element handle installation groove.

12. The filter element assembly according to claim 11, characterized in that Limiting grooves are arranged on opposite sides of the filter bottle cover, and limiting platforms are arranged on opposite sides of the filter element handle. The limiting grooves and the limiting platforms cooperate in limiting positions in the up and down directions. The filter element handle has a first position in which the limiting platform slides into the limiting groove, and a second position in which the limiting platform slides out of the limiting groove.

13. The filter element assembly according to claim 9, characterized in that: The filter element handle is arranged in a U shape, and the inner wall surface of the filter element handle at least abuts against a part of the outer wall surface of the filter element cover.

14. The filter element assembly according to claim 13, characterized in that: The upper surface of the filter element handle is flush with the upper surface of the filter element cover.

15. The filter element assembly according to claim 9, characterized in that: A notch groove is arranged at one end of the filter element cover away from the clamping portion.

16. A water purification device, characterized in that: Comprising a filter element assembly as described in any one of claims 1 to 15.

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