Composite filter element and device with water purification function

Abstract

The application discloses a composite filter element and a device with water purification function, wherein the composite filter element comprises a filter bottle, a filter bottle cover, a filter element cover, a reverse osmosis assembly, a filter assembly and a filter element handle; the filter bottle cover covers the filter bottle, the filter bottle cover is provided with an avoiding opening, the outer periphery of the avoiding opening is provided with a limiting table, and the limiting table is provided with a slot; the filter element cover is detachably installed at the avoiding opening; the reverse osmosis assembly is arranged in the filter bottle and is correspondingly arranged on the filter bottle cover; the filter assembly is arranged in the filter bottle and is correspondingly arranged on the filter element cover; the filter element handle comprises a pull rod and two sliding rods connected with the two ends of the pull rod, the sliding rods are slidably connected with the filter element cover, one side of the pull rod towards the filter element cover is provided with a press joint part, the filter element handle has a first position and a second position, the filter element handle can slide between the first position and the second position, and when the filter element handle is in the first position, the press joint part is located in the slot. The composite filter element can solve the technical problem that the joint part of the filter bottle cover and the filter element cover is prone to water leakage.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a composite filter element and a device with water purification function. Background Technology

[0002] Tap water contains a high level of dissolved solids, so more and more users are choosing water purification equipment to filter out these dissolved solids and improve water quality. Currently, commonly used filter cartridges are composite cartridges that include at least a pre-filter and a reverse osmosis filter. To facilitate the replacement of the pre-filter, existing products design the pre-filter as a removable cartridge.

[0003] For detachable filter cartridge assemblies, the filter cover portion is also configured as a filter cartridge cover and a filter bottle cover for the pre-filter and reverse osmosis filter cartridge, respectively, with the filter cartridge cover being detachable compared to the filter bottle cover. However, during use, the pre-filter cartridge experiences greater upward buoyancy, which can push up the filter cartridge cover, causing leakage at the joint between the filter bottle cover and the filter cartridge cover. Therefore, an effective limiting structure is needed to solve this problem. Summary of the Invention

[0004] The main objective of this invention is to propose a composite filter element that aims to solve the technical problem of easy water leakage at the joint between the filter bottle cap and the filter element cap.

[0005] To achieve the above objectives, the present invention proposes a composite filter element, comprising a filter bottle, a filter bottle cap, a filter element cap, a reverse osmosis assembly, a filtration assembly, and a filter element handle. The filter bottle cap covers the filter bottle and has a clearance opening. A limiting platform is provided on the outer periphery of the clearance opening, and the limiting platform has a slot. The filter element cap is detachably installed at the clearance opening. The reverse osmosis assembly is placed inside the filter bottle and is positioned corresponding to the filter bottle cap. The filtration assembly is disposed inside the filter bottle and is positioned corresponding to the filter element cap. The filter element handle includes a pull rod and two sliding rods connected to both ends of the pull rod. The sliding rods are slidably connected to the filter element cap. A pressing part is provided on the side of the pull rod facing the filter element cap. The filter element handle has a first position and a second position, and the filter element handle can slide between the first position and the second position. When the filter element handle is in the first position, the pressing part is located in the slot.

[0006] In one embodiment, when the filter element handle is in the first position, the crimping portion passes through the slot to limit the position of the filter element cover.

[0007] In one embodiment, the filter cover is provided with a groove, the crimping part passes through the groove and is at least partially located in the groove, the crimping part is used to abut against the groove wall to limit the filter cover.

[0008] In one embodiment, the crimping portion and the slot are tightly fitted in the axial direction of the clearance opening.

[0009] In one embodiment, the lower surface of the crimping portion is flush with the lower surface of the pull rod.

[0010] In one embodiment, the outer periphery of the clearance opening forms a placement surface, the limiting platform is disposed on the placement surface, and the bottom of the slot is flush with the placement surface.

[0011] In one embodiment, the number of crimping portions is set to one, and the crimping portion is located in the middle of the pull rod; or, the number of crimping portions is set to multiple, and the multiple crimping portions are spaced apart on the pull rod.

[0012] In one embodiment, the clearance opening is circular, the limiting platform has opposing inner and outer sides, the inner contour of the limiting platform matches the contour of the clearance opening, and the outer contour of the limiting platform matches the inner contour of the filter element handle.

[0013] In one embodiment, the height of the slot is not greater than half the height of the limiting platform and not less than one-third the height of the limiting platform.

[0014] In one embodiment, filter element cover is provided with filter element handle grooves on opposite sides, and filter element handle sliding shafts are provided on the two sliding rods. The filter element handle sliding shafts are movably disposed in the filter element handle grooves to slide between the first position and the second position.

[0015] In one embodiment, the filter element handle groove extends along the length of the filter element cover, and track grooves are formed on opposite sides of the filter bottle cover. Sliding portions are formed on opposite sides of the filter element handle. The track grooves and the sliding portions are slidably engaged. When the filter element handle is in the first position, the track grooves limit the sliding portions in a sliding direction perpendicular to the sliding portions.

[0016] In one embodiment, the reverse osmosis assembly includes a central tube and a reverse osmosis filter element. The central tube is disposed inside the filter bottle and divides the internal receiving cavity of the filter bottle into a first chamber and a second chamber. The second chamber is located on the outer periphery of the first chamber. The reverse osmosis filter element is sleeved on the outer wall of the central tube and located inside the second chamber. One end of the central tube is open, and the open end is correspondingly disposed with the clearance opening. The filtration assembly includes a pre-filter element, which is disposed in the first chamber.

[0017] This invention also proposes a device with a water purification function, the device including the composite filter element. The composite filter element includes a filter bottle, a filter bottle cap, a filter element cap, a reverse osmosis assembly, a filtration assembly, and a filter element handle; the filter bottle cap covers the filter bottle, the filter bottle cap has a clearance opening, a limiting platform is provided on the outer periphery of the clearance opening, and the limiting platform has a slot; the filter element cap is detachably installed at the clearance opening; the reverse osmosis assembly is placed inside the filter bottle and is positioned corresponding to the filter bottle cap; the filtration assembly is disposed inside the filter bottle and is positioned corresponding to the filter element cap; the filter element handle includes a pull rod and two sliding rods connected to both ends of the pull rod, the sliding rods are slidably connected to the filter element cap, the pull rod has a pressing part on the side facing the filter element cap, the filter element handle has a first position and a second position, the filter element handle can slide between the first position and the second position, when the filter element handle is in the first position, the pressing part is located in the slot.

[0018] The technical solution of this invention involves providing a limiting platform with a slot on the filter bottle cap, and a pressing part on the side of the filter element handle facing the filter element cap. The filter element handle has a first position and a second position, and can slide between the first and second positions. When the filter element handle is in the first position, the pressing part is located in the slot, limiting the filter element cap in the vertical direction. This prevents the filter element cap from moving upwards, avoiding misalignment at the flow channel connection between the filter element cap and the filter bottle cap, and preventing water leakage at the connection between the filter element cap and the filter bottle cap. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of an embodiment of the composite filter element of the present invention;

[0021] Figure 2 for Figure 1 Exploded view of a composite filter element;

[0022] Figure 3 for Figure 1 Cross-sectional view of a composite filter element;

[0023] Figure 4 for Figure 3 A schematic diagram of the structure for removing the filter element from the composite filter element;

[0024] Figure 5 for Figure 1 Exploded view of a reverse osmosis module;

[0025] Figure 6 This is an exploded view of the filter assembly and filter element cover of the present invention;

[0026] Figure 7 This is a cross-sectional view of the filter assembly and filter element cover of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of an embodiment of the filter cap assembly of the present invention;

[0028] Figure 9 for Figure 8 Exploded view of the middle filter cover assembly;

[0029] Figure 10 for Figure 8 Cross-sectional view of the middle filter cover assembly;

[0030] Figure 11 for Figure 8 A schematic diagram of the structure of the middle filter cover assembly with the outer cover plate removed;

[0031] Figure 12 for Figure 11 Exploded view of the structure of the middle filter cover assembly;

[0032] Figure 13 for Figure 12 A structural diagram from another perspective of the central structure;

[0033] Figure 14 for Figure 13 Enlarged view of point A in the middle.

[0034] Explanation of icon numbers:

[0035]

[0036]

[0037] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if the word "and / or" appears throughout the text, it means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0041] This invention proposes an embodiment of a composite filter element for installation in a device with a water purification function to filter raw water (i.e., tap water) passing through it, so that the water quality meets the user's needs before being used by the user.

[0042] Please see Figures 1 to 4 , Figure 8 and Figure 9In one embodiment of the present invention, the composite filter element 10 includes a filter bottle 100, a filter bottle cap 410, a filter element cap 430, a reverse osmosis assembly 300, a filtration assembly 200, and a filter element handle 440; the filter bottle cap 410 covers the filter bottle 100, and the filter bottle cap 410 is provided with a clearance opening 416, and a limiting platform 418 is provided on the outer periphery of the clearance opening 416, and the limiting platform 418 is provided with a slot 418a; the filter element cap 430 is detachably installed at the clearance opening 416; the reverse osmosis assembly 300 is placed inside the filter bottle 100 and is provided corresponding to the filter bottle cap 410; the filtration assembly 200... The filter element handle 440 is disposed within the filter bottle 100 and corresponds to the filter element cover 430. The filter element handle 440 includes a pull rod 441 and two sliding rods 442 connected to both ends of the pull rod 441. The sliding rods 442 are slidably connected to the filter element cover 430. The pull rod 441 has a crimping part 441a on the side facing the filter element cover 430. The filter element handle 440 has a first position and a second position. The filter element handle 440 can slide between the first position and the second position. When the filter element handle 440 is in the first position, the crimping part 441a is located in the slot 418a.

[0043] Specifically, the composite filter element 10 proposed in this invention includes a filter bottle 100, a filter assembly 200, a reverse osmosis assembly 300, and a filter cover assembly 400. The filter cover assembly 400 includes a filter bottle cover 410, a filter bottle handle 420, a filter element cover 430, and a filter element handle 440. The filter bottle 100 has an internal receiving cavity 110. The filter assembly 200 and the reverse osmosis assembly 300 are disposed within the receiving cavity 110. The filter assembly 200 is located inside the reverse osmosis assembly 300, or the reverse osmosis assembly 300 is located inside the filter assembly 200, or the filter assembly 200 is located on one side of the reverse osmosis assembly 300. It should be noted that the filter assembly 200 and the reverse osmosis assembly 300 are respectively disposed in two independent chambers within the filter bottle 100, that is, a first chamber 111 and a second chamber 112 are formed within the receiving cavity 110, the filter assembly 200 is disposed in the first chamber 111, and the reverse osmosis assembly 300 is disposed in the second chamber 112. The filter bottle 100 is barrel-shaped with an open end 120 at its upper end, and the filter cap assembly 400 is disposed to cover the open end 120. The filter cap assembly 400 is provided with at least one inlet end and at least one outlet end, both of which are connected to the receiving cavity 110.

[0044] Please see Figure 3 and Figure 4Specifically, both the filter assembly 200 and the reverse osmosis assembly 300 are disposed in the receiving cavity 110 of the filter bottle 100. The filter assembly 200 may include a pre-filter 210, a post-filter 220, or both. The filter assembly 200 filters out impurities contained in the water and / or improves the taste of the water. The reverse osmosis assembly 300 may include a reverse osmosis filter 310. The reverse osmosis assembly 300 filters out solutes such as salt ions in the water, thereby reducing the concentration of solutes such as salt ions in the water and reducing the TDS value of the raw water.

[0045] Please see Figure 3 and Figure 6 Furthermore, the filter cover assembly 400 includes a filter bottle cover 410, a filter bottle 100 handle, a filter element cover 430, a filter element handle 440, and an outer cover plate 450. The filter bottle 100 handle is rotatably connected to the filter bottle cover 410 to facilitate the user to directly lift the entire composite filter element 10 using the filter bottle 100 handle. 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 (i.e., the end of the plurality of first water passages 410a away from the second water passage 430a). Correspondingly, the first inlet 411 is the raw water inlet, which is connected to the inlet side of the pre-filter 210 and is used to supply raw water; the first outlet 412 is connected to the outlet side of the pre-filter 210 and is used to supply water that has been filtered by the pre-filter 210; the second inlet 413 is connected to the inlet side of the reverse osmosis filter 310, and the water flows into the first chamber 111 through the second inlet 413 after being pressurized by the booster pump and is filtered by the reverse osmosis filter 310; the wastewater outlet 415 is the outlet for wastewater that has been filtered by the reverse osmosis filter 310 and is mainly used to supply wastewater that has been filtered by the reverse osmosis filter 310.

[0046] It should be noted that the second outlet 414 can be an outlet connected to the outlet side of the reverse osmosis filter element 310, or it can be an outlet connected to the outlet side of the post-filter element 220. When the filtration assembly 200 only includes the pre-filter element 210, the second outlet 414 is used as the outlet for pure water 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 to allow pure water to flow out. When the filtration assembly 200 only includes the post-filter element 220, or includes both the pre-filter element 210 and the post-filter element 220, the second outlet 414 is used as the outlet for pure water filtered by the post-filter element 220. The pure water filtered by the reverse osmosis filter element 310 should flow into the post-filter element 220 for further filtration. In this case, the second outlet 414 is connected to the outlet side of the post-filter element 220.

[0047] Furthermore, the filter bottle cap 410 is provided with filter bottle 100 handle mounting grooves (not shown in the figure) on opposite sides. The filter bottle 100 handle is roughly U-shaped, and its two ends are provided with filter bottle 100 handle pivots (not shown in the figure). The filter bottle 100 handle pivots are located in the filter bottle 100 handle mounting grooves and can rotate relative to the filter bottle 100 handle mounting grooves, so that the filter bottle 100 handle can rotate relative to the filter bottle cap 410, so that the user can directly carry the composite filter element 10 by hand through the filter bottle 100 handle. The outer cover plate 450 covers the entire filter bottle cover 410, i.e., the filter element cover 430. On the one hand, it can prevent dust and other objects from entering the gap between the filter element cover 430 and the filter bottle cover 410, and also ensure the consistency of the appearance of the composite filter element 10. On the other hand, the outer cover plate 450 covering the entire filter element cover 430 can also press the filter element cover 430 tightly and limit the filter element cover 430 in the vertical direction. This is to prevent the filter element cover 430 from being misaligned at the flow channel joint with the filter bottle cover 410 when the filter element cover 430 is subjected to a large upward force, which would cause water leakage at the connection between the filter element cover 430 and the filter bottle cover 410.

[0048] Please see Figure 9 and Figure 12 Furthermore, the filter bottle cap 410 may be provided with a clearance opening 416, and the filter element cap 430 is disposed at the clearance opening 416 for installation of the filter assembly 200. The filter element cap 430 is disposed corresponding to the first chamber 111. The filter element cap 430 is an independent component, disposed at the clearance opening 416, and detachably connected to the filter bottle cap 410. When replacing the filter assembly 200, only the filter element cap 430 needs to be removed, and then the filter assembly 200 can be replaced; or, the filter element cap 430 is connected to the filter element, and by removing the filter element cap 430, the entire filter element can be directly removed to replace the filter assembly 200. It should be emphasized that the connection method between the filter element cap 430 and the filter element can be a direct connection or an indirect connection, such as a connection between the filter element cap 430 and the filter element via an upper end cap 250, and there is no specific limitation on either method.

[0049] Please see Figure 11 , Figure 12 and Figure 14A limiting platform 418 is also provided on the outer periphery of the clearance opening 416. A slot 418a is provided on the limiting platform 418. When the filter element handle 440 slides from the second position to the first position, the pressing part 441a is located in the slot 418a. When the filter element cover 430 is pushed up, since the pressing part 441a is located in the slot 418a, the groove wall of the slot 418a has a limiting effect on the pressing part 441a in the vertical direction, thereby preventing misalignment at the flow channel docking point of the filter element cover 430 and the filter bottle cover 410, and preventing water leakage at the connection between the filter element cover 430 and the filter bottle cover 410.

[0050] Please see Figure 9 and Figure 12 In one embodiment, the filter element handle groove 431 extends along the length of the filter element cover 430, and the filter element handle slide shaft 442a can slide within the filter element handle groove 431. Further, track grooves 417a are formed on opposite sides of the filter bottle cover 410, and sliding portions 442b are formed on opposite sides of the filter element handle 440. The sliding portions 442b are formed on the slide rod 442. The filter element handle 440 has a first position where the sliding portion 442b slides into the track groove 417a, and a second position where the sliding portion 442b slides out of the track groove 417a. When the filter element handle 440 is in the first position, the track groove 417a limits the sliding portion 442b in the vertical direction. Specifically, the filter element handle slide shaft 442a can slide within the filter element handle slide groove 431. When the user needs to disassemble and replace the pre-filter 210, the filter element handle 440 needs to be slid from the first position to the second position first, and then the filter element handle 440 needs to be rotated to lift it out. The clearance opening 416 is provided with track portions 417 on both sides. The inner side of the track portion 417 forms the track groove 417a. When it slides to the first position, the sliding portion 442b and the track portion 417 are limited in the vertical direction. The track portion 417 limits the filter element handle 440, so that the filter element handle 440 cannot be rotated directly in the vertical direction. It restricts the rotation of the filter element handle 440. At the same time, the filter element handle 440 can also press the filter element cover 430, thereby preventing the filter element cover 430 from moving upward and causing misalignment at the flow channel docking point between the filter element cover 430 and the filter bottle cover 410, which would lead to water leakage at the connection between the filter element cover 430 and the filter bottle cover 410.

[0051] Please see Figure 7Furthermore, the upper surface of the filter element handle 440 is flush with the upper surface of the filter element cover 430. Specifically, the flushness of the upper surface of the filter element handle 440 and the upper surface of the filter element cover 430 ensures the consistency of the upper surface of the filter assembly 200. It should be noted that the flushness of the upper surface of the filter element handle 440 and the upper surface of the filter element cover 430 refers to the state when the filter element handle 440 is in the first position.

[0052] Please see Figure 12 In one embodiment, the filter element handle 440 includes a pull rod 441, with slide rods 442 connected to both ends of the pull rod 441. The slide rods 442 are slidably connected to the filter element cover 430 and are slidable and rotatable relative to the filter element cover 430. A crimping part 441a is specifically provided on the pull rod 441 and is located on the side of the pull rod 441 near the filter element cover 430.

[0053] Furthermore, the filter element handle 440 is U-shaped, and the inner wall surface of the filter element handle 440 abuts against at least a portion of the outer wall surface of the filter element cover 430. This arrangement of the inner wall surface of the filter element handle 440 against a portion of the outer wall surface of the filter element cover 430 results in a compact layout, a reasonable structure, and efficient use of space, enabling the miniaturization of the filter cover.

[0054] In one embodiment, when the filter element handle 440 is in the first position, the crimping portion 441a passes through the slot 418a to limit the filter element cover 430. When the filter element handle 440 slides from the second position to the first position, the crimping portion 441a passes through the slot 418a, and the crimping portion 441a is at least partially located above the filter element cover 430, so as to limit the filter element cover 430 in the vertical direction by means of the crimping portion 441a, to prevent misalignment of the flow channel opening of the filter element cover 430 and the filter bottle cover 410, and to ensure that the connection between the filter bottle cover 410 and the filter element cover 430 will not have water leakage problems.

[0055] Please see Figure 11 and Figure 12Furthermore, the filter element cover 430 is provided with a pressing groove 432, and the pressing part 441a passes through the slot 418a and is at least partially located within the pressing groove 432. The pressing part 441a is used to abut against the groove wall of the pressing groove 432 to limit the filter element cover 430. Specifically, the filter element cover 430 is also provided with a pressing groove 432. When the filter element handle 440 moves from the second position to the first position, the pressing part 441a extends into the slot 418a and can abut against the groove wall of the pressing groove 432 to limit the filter element cover 430 in the vertical direction. It should be noted that the pressure groove 432 can be a recessed groove opened on the side of the filter cover 430 that is directly opposite the slot 418a, or it can be a notched pressure groove 432 that is directly opposite the slot 418a. In this embodiment, the pressure groove 432 is a notched pressure groove 432, with one side of the groove corresponding to the slot 418a and the other side of the groove facing upward.

[0056] In one embodiment, the crimping part 441a and the slot 418a are tightly fitted in the axial direction of the clearance opening 416. Specifically, the crimping part 441a and the slot 418a are tightly fitted in the axial direction of the clearance opening 416 to ensure that after the crimping part 441a extends into the slot 418a, it will not move in the axial direction of the clearance opening 416, thereby ensuring the limiting effect of the limiting platform 418 on the filter cover 430 in the vertical direction.

[0057] Please see Figure 9 and Figure 12 In one embodiment, the lower surface of the crimping part 441a is flush with the lower surface of the pull rod 441. This arrangement facilitates the manufacturing and processing of the crimping part 441a. Furthermore, since the crimping part 441a is flush with the lower surface of the pull rod 441, the bottom of the slot 418a is also flush with the lower surface of the pull rod 441, facilitating the sliding of the pull rod 441 and ensuring the structural strength of the limiting platform 418.

[0058] Please see Figure 12 In one embodiment, the outer periphery of the clearance opening 416 forms a placement surface 410b, the limiting platform 418 is disposed on the placement surface 410b, and the bottom of the slot 418a is flush with the placement surface 410b. By setting a separate placement surface 410b and placing the limiting platform 418 on the placement surface 410b, interference is prevented when the filter element handle 440 slides between the first and second positions. The bottom of the slot 418a is flush with the placement surface 410b, and the slot 418a is disposed at the lower part of the limiting platform 418, ensuring that the upper part of the limiting platform 418 has sufficient thickness. This ensures that the limiting platform 418 has sufficient structural strength so that after the pressing part 441a is inserted into the slot 418a, the limiting platform 418 can limit the filter element cover 430 in the vertical direction.

[0059] Please see Figure 12 and Figure 13 In one embodiment, the number of crimping portions 441a is set to one, and the crimping portion 441a is located in the middle of the pull rod 441. Alternatively, the number of crimping portions 441a is set to multiple, and the multiple crimping portions 441a are spaced apart on the pull rod 441. Specifically, the number of crimping portions 441a can be set to one or multiple, and the number of crimping grooves 432 is set to at least one. Preferably, the number of slots 418a is consistent with the number of crimping portions 441a, and the shape of the slots 418a is consistent with the shape of the crimping portions 441a.

[0060] Furthermore, the clearance opening 416 is circular, and the limiting platform 418 has opposing inner and outer sides. The inner contour of the limiting platform 418 matches the contour of the clearance opening 416, and the outer contour of the limiting platform 418 matches the inner contour of the filter element handle 440.

[0061] Please see Figure 12 and Figure 14 In one embodiment, the height of the slot 418a is no greater than half the height of the limiting platform 418 and no less than one-third of the height of the limiting platform 418. Specifically, since the crimping part 441a passes through the slot 418a to limit the filter cover 430, when the filter cover 430 is subjected to an upward force, the force will be transmitted to the limiting platform 418. To ensure the structural strength of the limiting platform 418, the height of the slot 418a is set to be no greater than half the height of the limiting platform 418, that is, the height of the slot 418a is equal to or less than half the height of the limiting platform 418. Of course, to avoid the crimping part 441a being too weak and prone to breakage, the thickness of the crimping part 441a is set to be no less than one-third of the height of the limiting platform 418. And the thickness of the crimping part 441a is consistent with the height of the slot 418a, that is, the height of the slot 418a is no less than one-third of the height of the limiting platform 418.

[0062] Please continue reading. Figures 12 to 14 In one embodiment, filter element cover 430 is provided with filter element handle grooves 431 on opposite sides, and filter element handle sliding shafts 442a are provided on the two sliding rods 442. The filter element handle sliding shafts 442a are movably disposed in the filter element handle grooves 431 to slide between the first position and the second position.

[0063] Specifically, the filter element handle 440 is roughly U-shaped, with filter element handle sliding shafts 442a at both ends. The filter element handle sliding shafts 442a are located in the filter element handle sliding groove 431 and can rotate and slide relative to the filter element handle sliding groove 431, thereby allowing the filter element handle 440 to move relative to the filter element cover 430. Considering that the filter elements, i.e., the pre-filter element 210 and / or the post-filter element 220, have a shorter service life than the reverse osmosis filter element 310, when the service life of the filter element expires, the entire filter assembly 200 can be disassembled from the composite filter element 10 by lifting the filter element handle 440, which is convenient for users.

[0064] Please see Figure 12 and Figure 14 In one embodiment, the filter element handle groove 431 extends along the length direction of the filter element cover 430, the filter bottle cover 410 has track grooves 417a formed on opposite sides, and the filter element handle 440 has sliding portions 442b formed on opposite sides. The track grooves 417a and the sliding portions 442b are slidably engaged. When the filter element handle 440 is in the first position, the track grooves 417a limit the sliding portions 442b in the sliding direction perpendicular to the sliding portion 442b.

[0065] Specifically, the filter element handle slide shaft 442a can slide within the filter element handle slide groove 431. When the user needs to disassemble and replace the pre-filter 210, the filter element handle 440 needs to be slid from the first position to the second position first, and then the filter element handle 440 needs to be rotated to lift it out. The clearance opening 416 is provided with track portions 417 on both sides. The track groove 417a is formed on the inner side of the track portion 417. When it slides to the first position, the sliding portion 442b and the track portion 417 are in a limiting engagement in the sliding direction (i.e., the up and down direction) perpendicular to the sliding portion 442b. The track portion 417 plays a limiting role on the filter element handle 440, so that the filter element handle 440 cannot be directly rotated in the up and down direction. It plays a role in restricting the rotation of the filter element handle 440. At the same time, the filter element handle 440 can also press the filter element cover 430, thereby preventing the filter element cover 430 from moving upward and causing misalignment at the flow channel docking point between the filter element cover 430 and the filter bottle cover 410, which would cause water leakage at the connection between the filter element cover 430 and the filter bottle cover 410.

[0066] Furthermore, the upper surface of the filter element handle 440 is flush with the upper surface of the filter element cover 430. Specifically, the flushness of the upper surface of the filter element handle 440 and the upper surface of the filter element cover 430 ensures the consistency of the upper surface of the filter assembly 200. It should be noted that the flushness of the upper surface of the filter element handle 440 and the upper surface of the filter element cover 430 refers to the state when the filter element handle 440 is in the first position.

[0067] Please see Figure 3 , Figure 6 and Figure 7 In one embodiment, the filter assembly 200 includes a filter element, a water outlet pipe 230, a welded plate 240, an upper end cap 250, a lower end cap 260, and a separator 270. It should be noted that the filter element can be a pre-filter 210, a post-filter 220, or both. When the filter element includes both a pre-filter 210 and a post-filter 220, the pre-filter 210 and the post-filter 220 can be arranged vertically, horizontally, or internally and externally; their specific positions are not limited. The pre-filter 210 and the post-filter 220 are separated by the separator 270, so that when the filter assembly 200 is installed in a device with a water purification function, the separator 270 and other structures in the composite filter 10 enclose each other to form an independent first filter chamber 610 and a second filter chamber 620. The pre-filter 210 and the post-filter 220 are respectively disposed in the first filter chamber 610 and the second filter chamber 620, so that the water flow path through the pre-filter 210 and the water flow path through the post-filter 220 do not affect each other.

[0068] When the filter cartridge includes both a pre-filter 210 and a post-filter 220, the pre-filter 210, used to remove most impurities from the raw water, needs to be larger in overall volume. However, the water passing through the post-filter 220 has already undergone two filtrations—the pre-filter 210 and the reverse osmosis filter 310—resulting in very low solute content; therefore, the post-filter 220 can be relatively smaller in overall volume. Arranging the pre-filter 210 and post-filter 220 vertically facilitates a reasonable volume distribution and ensures effective filtration. Specifically, the pre-filter 210 is positioned above the post-filter 220, close to the filter cover 430, while the post-filter 220 is positioned on the side of the pre-filter 210 furthest from the filter cover 430.

[0069] Please see Figure 3 , Figure 5 and Figure 6In one embodiment, both the pre-filter 210 and the post-filter 220 are hollow cylindrical. One end of the pre-filter 210 is connected to the upper end cap 250, and the other end is connected to the upper surface of the separator 270. The connection between the pre-filter 210, the upper end cap 250, and the separator 270 is adhesive bonding to prevent water from bypassing the pre-filter 210 for filtration and flowing directly out through the connection between the pre-filter 210, the upper end cap 250, and the separator 270. Of course, the pre-filter 210 can also be connected to the upper end cap 250 and the separator 270 in other ways, and there are no specific limitations. The separator 270 can be cylindrical, and the post-filter 220 is disposed inside the cylindrical separator 270, separating the pre-filter 210 and the post-filter 220. The cylindrical separator 270 has an opening at the bottom for inserting the post-filter cartridge 220, and the opening is sealed by the lower end cap 260. The post-filter cartridge 220, located inside the cylindrical separator 270, is bonded to the top of the separator 270 and the lower end cap 260 to prevent water from bypassing the post-filter cartridge 220 for filtration and flowing directly out through the connection between the post-filter cartridge 220 and the top and lower end cap 260 inside the separator 270. Of course, the post-filter cartridge 220 can also be connected to the top and lower end cap 260 inside the separator 270 in other ways; no specific limitation is made.

[0070] Please see Figure 3 or Figure 6 In one embodiment, the length of the pre-filter 210 is greater than the length of the post-filter 220 to ensure the filtration effect of both the pre-filter 210 and the post-filter 220. Furthermore, the length of the pre-filter 210 is 2-3 times the length of the post-filter 220.

[0071] It should be noted that, in order to ensure the compactness and miniaturization of the filter assembly 200, since the pre-filter 210 is hollow cylindrical and the post-filter 220 is located below the pre-filter 210, a water outlet pipe 230 can be provided inside the pre-filter 210. One end of the water outlet pipe 230 is connected to the water outlet side of the post-filter 220, and the other end is connected to the water outlet channel on the filter cover 430. This allows the water inlet channel and water outlet channel of the filter assembly 200 to be integrated on the filter cover 430, ensuring the compactness of the filter assembly 200 and achieving miniaturization of the filter assembly 200 and the composite filter 10 on which the filter assembly 200 is installed. To ensure the independence of the water flow path of the post-filter 220 from that of the pre-filter 210, a corresponding sealing structure can be set to ensure the sealing of both ends of the water outlet pipe 230. For example, two welded pieces 240 are connected to the filter cover 430 and the separator 270 respectively to form a sealing groove for installing the sealing element. The sealing element is installed in the sealing groove to limit the position of the sealing element. At the same time, the sealing effect of the sealing element seals both ends of the water outlet pipe 230.

[0072] Please see Figures 8 to 13 Furthermore, the entire filter assembly 200 is integrated, with the filter element cover 430 located on top of the entire filter assembly 200. The filter element cover 430 is connected to the upper end cover 250. The connection between the filter element cover 430 and the upper end cover 250 can be a sealed connection, an adhesive connection, or other connection methods.

[0073] Please see Figure 10 and Figure 12 Furthermore, a sealing ring 500 can be provided at the joint between the flow channel opening of the filter bottle cap 410 and the flow channel opening of the filter element cap 430 to ensure the sealing of the flow path. When the filter element cap 430 is installed at the clearance opening 416 of the filter bottle cap 410, the sealing ring 500 can use elastic deformation to ensure a tight seal between the joint between the flow channel openings of the filter bottle cap 410 and the filter element cap 430, while also ensuring that the filter element cap 430 will not easily wobble relative to the filter bottle cap 410 in the vertical direction. The sealing ring 500 can be made of rubber or silicone, or other materials, without specific limitations.

[0074] Please see Figures 2 to 5In one embodiment, the reverse osmosis 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 fitted onto the outer wall of the central tube 340 and is disposed between the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330. The upper and lower ends 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 reverse osmosis filter element 310 grooves for the end of the reverse osmosis filter element 310 to be inserted. Thus, the reverse osmosis top cover 320 and the reverse osmosis bottom cover 330 together fix the reverse osmosis filter element 310 inside the filter bottle 100.

[0075] Please see Figures 3 to 5 Furthermore, the reverse osmosis assembly 300 is disposed within the receiving cavity 110, which is divided into a first chamber 111 and a second chamber 112 by the central tube 340. The second chamber 112 is located on the outer periphery of the first chamber 111. Specifically, the central tube 340 is a hollow cylindrical structure, with the first chamber 111 formed inside the central tube 340 and the second chamber 112 formed outside the hollow tube. The filter assembly 200 is disposed in the first chamber 111, with a first water passage gap 710 formed between the pre-filter element 210 and the inner wall of the central tube 340, which communicates with the first inlet 411. The reverse osmosis assembly 300 is disposed in the second chamber 112, with a second water passage gap 720 formed between the reverse osmosis filter element 310 and the inner wall of the filter bottle 100, which communicates with the second inlet 413.

[0076] When the filter element of the filter assembly 200 includes a pre-filter element 210 and a post-filter element 220, the separator 270 divides the first chamber 111 into a first filter chamber 610 and a second filter chamber 620 that are independent of each other. The pre-filter element 210 is placed in the first filter chamber 610 and the post-filter element 220 is placed in the second filter chamber 620 to ensure that the water flow path through the pre-filter element 210 and the water flow path through the post-filter element 220 do not interfere with each other. Furthermore, a first water passage 341 is opened at the position of the central tube 340 corresponding to the second filter chamber 620, so that the pure water filtered by the reverse osmosis filter element 310 can flow directly into the second filter chamber 620 through the first water passage 341 and be filtered again by the post-filter element 220, without having to set up 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 220, thus achieving the compactness of the composite filter element 10 structure. The first water passage 341 connects the first chamber 111 and the second filter chamber 620, which also further shortens 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 220, thereby improving the water output efficiency of the composite filter element 10.

[0077] Please see Figure 4 and Figure 6 Furthermore, the separator 270 is barrel-shaped, and the post-filter element 220 is disposed within the separator 270. The peripheral wall of the separator 270 forms the third water passage gap 730 with the inner wall of the first central tube 340. The peripheral wall of the separator 270 is provided with a second water passage hole 271, which communicates with the first water passage hole 341. The first chamber 111 communicates with the second filter chamber 620 through the first water passage hole 341 and the second water passage hole 271. By making the separator 270 barrel-shaped, it can be ensured that the post-filter element 220 disposed within the barrel-shaped separator 270 is not easily torn when it floats up and down under water pressure, thus affecting the service life of the post-filter element 220.

[0078] The composite filter element 10 proposed in this invention has the following specific flow path:

[0079] Please see Figure 1 and Figure 3 Raw water flows into the first water passage 710 through the first inlet 411. After being filtered by the pre-filter 210, it flows out through the outlet channel 211 between the inner wall of the pre-filter 210 and the outer wall of the outlet pipe 230, and then out through the first outlet 412. The water flowing out of the first outlet 412 is pressurized by the booster pump and flows into the second water passage 720 through the second inlet 413. Water enters from the side of the reverse osmosis filter 310 (this refers to the reverse osmosis filter 310 using a 3D water-saving membrane; if the reverse osmosis filter 310 uses a regular filter membrane, water enters from the bottom of the reverse osmosis filter 310). After being filtered by the reverse osmosis filter 310, the water flow is divided into two paths: a pure water path and a wastewater path. The pure water flows to the post-filter 220 for further filtration, and the wastewater flows out of the composite filter 10 through the wastewater outlet 415. The pure water first flows through the first water passage 341 on the central pipe 340 to the third water passage 730, and then flows through the second water passage 271 on the separator 270 to the post-filter cartridge 220 for filtration. The pure water filtered by the post-filter cartridge 220 flows from the inside of the post-filter cartridge 220 to the outlet pipe 230, and finally flows out from the second outlet 414 for user use.

[0080] It should be emphasized that if the filter cartridge does not include the post-filter cartridge 220, the pure water filtered by the reverse osmosis filter cartridge 310 will flow directly out from the second outlet 414 for user use.

[0081] The technical solution of this invention involves providing a limiting platform 418 on the filter bottle cap 410, with a slot 418a on the limiting platform 418, and a pressing part 441a on the side of the filter element handle 440 facing the filter element cover 430. The filter element handle 440 has a first position and a second position, and can slide between the first and second positions. When the filter element handle 440 is in the first position, the pressing part 441a is located in the slot 418a, limiting the filter element cover 430 in the vertical direction. This prevents the filter element cover 430 from moving upwards, avoiding misalignment at the flow channel connection between the filter element cover 430 and the filter bottle cap 410, and preventing water leakage at the connection between the filter element cover 430 and the filter bottle cap 410.

[0082] This invention also proposes a device with a water purification function, which includes the aforementioned composite filter element. The specific structure of the composite filter element is as described in the above embodiments. Since this device with a water purification function adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here. The device with a water purification function can be any one of a water purifier, water dispenser, pure water machine, ice maker, water softener / purifier combo machine, or water purifier / heater combo machine.

[0083] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A composite filter cartridge, characterized by, The composite filter element includes: Filter flask; A filter bottle cap, which covers the filter bottle, has an allowance opening, and a limiting platform is provided on the outer periphery of the allowance opening, with a slot provided on the limiting platform; The filter element cover is detachably installed at the clearance opening; A reverse osmosis component is disposed inside the filter bottle and is disposed corresponding to the filter bottle cap; A filter assembly is disposed within the filter bottle and corresponds to the filter element cover; and The filter element handle includes a pull rod and two sliding rods connected to both ends of the pull rod. The sliding rods are slidably connected to the filter element cover. A crimping portion is provided on the side of the pull rod facing the filter element cover. The filter element handle has a first position and a second position. The filter element handle can slide between the first position and the second position. When the filter element handle is in the first position, the crimping portion is located in the slot. The crimping portion and the slot are tightly fitted in the axial direction of the clearance opening. Filter element handle sliding grooves are provided on opposite sides of the filter element cover. Filter element handle sliding shafts are provided on the two sliding rods. The filter element handle sliding shafts are movably disposed in the filter element handle sliding grooves to slide between the first position and the second position.

2. The composite filter element of claim 1 wherein, When the filter element handle is in the first position, the crimping part passes through the slot to limit the position of the filter element cover.

3. The composite filter element of claim 2 wherein, The filter element cover is provided with a pressure groove, and the crimping part passes through the slot and is at least partially located in the pressure groove. The crimping part is used to abut against the groove wall of the pressure groove to limit the position of the filter element cover.

4. The composite filter element of claim 2 wherein, The lower surface of the crimping part is flush with the lower surface of the pull rod.

5. The composite filter element of claim 4 wherein, The outer periphery of the clearance opening forms a placement surface, the limiting platform is disposed on the placement surface, and the bottom of the slot is flush with the placement surface.

6. The composite filter element of claim 5 wherein, The number of crimping parts is set to one, and the crimping part is located in the middle of the pull rod; or, the number of crimping parts is set to multiple, and the multiple crimping parts are spaced apart on the pull rod.

7. The composite filter element of claim 5 wherein, The clearance opening is circular, and the limiting platform has opposing inner and outer sides. The inner contour of the limiting platform matches the contour of the clearance opening, and the outer contour of the limiting platform matches the inner contour of the filter element handle.

8. The composite filter element of any one of claims 1 to 7, wherein, The height of the slot is no greater than half the height of the limiting platform and no less than one-third the height of the limiting platform.

9. The composite filter element of claim 1 wherein, The filter element handle groove extends along the length of the filter element cover. Track grooves are formed on opposite sides of the filter bottle cover, and sliding parts are formed on opposite sides of the filter element handle. The track grooves and the sliding parts are slidably engaged. When the filter element handle is in the first position, the track grooves limit the sliding parts in the sliding direction perpendicular to the sliding parts.

10. The composite filter element of any one of claims 1 to 7, wherein, The reverse osmosis assembly includes a central tube and a reverse osmosis filter element. The central tube is disposed inside the filter bottle and divides the internal accommodating cavity of the filter bottle into a first chamber and a second chamber. The second chamber is located on the outer periphery of the first chamber. The reverse osmosis filter element is fitted onto the outer wall of the central tube and is located inside the second chamber. One end of the central tube is open, and the open end is correspondingly disposed to the clearance opening. The filtration assembly includes a pre-filter element, which is disposed in the first chamber.

11. An apparatus having a water purification function, characterized by comprising: Includes the composite filter element as described in any one of claims 1 to 10.

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