Composite filter 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 first filter assembly, a second filter assembly, a filter bottle cover, a filter element cover and a cover plate; the filter bottle has a containing cavity; the first filter assembly is arranged in the containing cavity; the second filter assembly is detachably arranged in the containing cavity; the filter bottle cover covers the end of the filter bottle; the filter bottle cover is provided with a mounting groove; the groove bottom of the mounting groove is provided with a mounting opening; the second filter assembly is arranged in correspondence with the mounting opening; the filter bottle cover is further provided with at least two first water pipes; the at least two first water pipes are communicated with the containing cavity; the filter element cover is detachably arranged in the mounting groove; the filter element cover is provided with at least two second water pipes; the at least two second water pipes are communicated with the containing cavity; wherein the first water pipes and the second water pipes are used for being communicated with external water pipes; the cover plate is slidably connected with the filter bottle cover; and the cover plate covers the filter element cover. The composite filter element can solve the technical problem that the composite filter element is prone to failure.

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] For composite filter cartridges with removable pre-filters, the filter cover typically consists of two parts: a filter housing cover and a filter cartridge cover. The filter cartridge cover is designed to be removable relative to the filter housing cover, allowing for the replacement of the pre-filter cartridge by removing the cover. Because the filter cartridge cover is removable from the filter housing cover and positioned relative to the pre-filter cartridge, corresponding flow channels need to be incorporated into the filter cartridge cover to align with the flow channels on the filter housing cover, forming a complete water flow path.

[0003] However, during use, the pre-filter has a greater upward buoyancy, which pushes the filter cover upward, causing water leakage at the joint between the filter bottle cover and the filter cover, thus making the composite filter prone to failure.

[0004] It should be noted that the above content is only used to help understand the inventive concept of this application and does not represent prior art. Summary of the Invention

[0005] The main objective of this invention is to propose a composite filter element that aims to solve the technical problem of composite filter elements being prone to failure.

[0006] To achieve the above objectives, the present invention proposes a composite filter element, comprising a filter bottle, a first filter assembly, a second filter assembly, a filter bottle cap, a filter element cap, and a cover plate. The filter bottle has a receiving cavity; the first filter assembly is disposed within the receiving cavity, and the second filter assembly is detachably disposed within the receiving cavity; the filter bottle cap covers the end of the filter bottle, and an installation groove is formed on the filter bottle cap, with an installation opening formed at the bottom of the groove; the second filter assembly is disposed corresponding to the installation opening; the filter bottle cap is also provided with at least two first water passage pipes, which communicate with the receiving cavity; the filter element cap is detachably disposed in the installation groove, and the filter element cap is provided with at least two second water passage pipes, which communicate with the receiving cavity, wherein the first water passage pipes and the second water passage pipes are used to communicate with an external water circuit; the cover plate is slidably connected to the filter bottle cap, and the cover plate covers the filter element cap.

[0007] In one embodiment, the filter cover includes a body portion and a flow channel portion, the body portion being disposed corresponding to the mounting port, and the at least two second water passage pipes being formed in the flow channel portion.

[0008] In one embodiment, the bottom of the mounting groove has a positioning rib protruding upwards, and the flow channel is provided with a positioning port that cooperates with the positioning rib.

[0009] In one embodiment, there are multiple positioning ports, which are located on the lower side of the flow channel and on opposite sides of the second water pipe along its extension direction. There are multiple positioning ribs, which correspond one-to-one with the multiple positioning ports.

[0010] In one embodiment, at least one side of the flow channel is provided with a locking block, and the first water pipe is provided with a locking slot, wherein the locking block engages with the locking slot.

[0011] In one embodiment, the card block includes a connecting portion and a engaging portion connected to the connecting portion, a card groove is formed between the connecting portion and the engaging portion, and the card groove engages with the peripheral wall of the card slot.

[0012] In one embodiment, the engaging portion extends into the latch and the engaging portion has an arc surface similar in shape to the inner wall surface of the first water pipe.

[0013] In one embodiment, the body portion and the flow channel portion are integrally formed.

[0014] In one embodiment, the cover plate is provided with an abutting structure that abuts against the flow channel portion.

[0015] In one embodiment, the abutting structure includes a mounting portion and a plurality of abutting portions, the length direction of the abutting portions being parallel to the sliding direction of the cover plate, the mounting portion being disposed on the bottom surface of the cover plate, and the abutting portions being disposed on the surface of the mounting portion facing away from the cover plate.

[0016] In one embodiment, the abutting part is provided with an abutting strip, and the projection of the abutting strip onto a plane perpendicular to the sliding direction of the cover plate is semi-circular.

[0017] In one embodiment, the end of the abutment strip is provided with a contact bevel.

[0018] In one embodiment, the cover plate extends and bends on opposite sides to form mating portions, which slide in conjunction with the filter bottle cap.

[0019] In one embodiment, a sliding part is provided at the bottom of the mating part, and the filter bottle cap is provided with a sliding groove for the sliding part to slide.

[0020] In one embodiment, a latching platform is formed on the opposite sides of the two sliding parts, and a latching groove is provided on one side of the sliding groove to cooperate with the latching platform. The cooperation between the latching platform and the latching groove is used to restrict the movement of the cover plate in the axial direction of the composite filter element.

[0021] In one embodiment, the at least two first water pipes include a reverse osmosis inlet pipe and a wastewater outlet pipe, the reverse osmosis inlet pipe and the wastewater outlet pipe being spaced apart, and the flow channel being disposed between the reverse osmosis inlet pipe and the wastewater outlet pipe.

[0022] In one embodiment, the at least two second water pipes include a pre-inlet pipe, a pure water outlet pipe, and a pre-outlet pipe, wherein the reverse osmosis inlet pipe, the pre-inlet pipe, the pure water outlet pipe, the pre-outlet pipe, and the wastewater outlet pipe are arranged sequentially.

[0023] In one embodiment, the first filtration assembly includes a central tube and a reverse osmosis filter element. The central tube divides the receiving cavity into a first chamber and a second chamber. The first chamber is located on the outer periphery of the second chamber. The reverse osmosis filter element is fitted over the outer wall of the central tube and is located inside the first chamber. One end of the central tube is open and corresponds to the mounting port. The second filtration assembly is detachably disposed in the second chamber through the mounting port.

[0024] In one embodiment, the at least two first water pipes are connected to the first chamber, and the at least two second water pipes are connected to the second chamber.

[0025] In one embodiment, the composite filter element further includes a plurality of adapters, which are plugged into the ends of the at least two first water pipes and the at least two second water pipes.

[0026] In one embodiment, the ends of the first water pipe and the second water pipe are provided with anti-rotation notches, and the adapter is provided with an anti-rotation part, the anti-rotation part and the anti-rotation notch are mutually restrictive.

[0027] 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 first filter assembly, a second filter assembly, a filter bottle cap, a filter element cap, and a cover plate. The filter bottle has a receiving cavity; the first filter assembly is disposed in the receiving cavity, and the second filter assembly is detachably disposed in the receiving cavity; the filter bottle cap covers the end of the filter bottle, and an installation groove is formed on the filter bottle cap, with an installation opening formed at the bottom of the groove; the second filter assembly is disposed corresponding to the installation opening; the filter bottle cap is also provided with at least two first water passage pipes, which communicate with the receiving cavity; the filter element cap is detachably disposed in the installation groove, and the filter element cap is provided with at least two second water passage pipes, which communicate with the receiving cavity, wherein the first water passage pipes and the second water passage pipes are used to communicate with an external water circuit; the cover plate is slidably connected to the filter bottle cap, and the cover plate covers the filter element cap.

[0028] In one embodiment, the device with water purification function is any one of a water purifier, water dispenser, reverse osmosis water purifier, ice maker, water softener / purifier combo machine, or water purifier / heater combo machine.

[0029] The technical solution of the present invention, by setting the filter element cover to be detachably connected to the filter bottle cover, and integrating the first water pipe communicating with the receiving cavity inside the filter bottle onto the filter bottle cover, and the second water pipe integrated onto the filter element cover, avoids the situation where, during the use of the composite filter element, the upward buoyancy of the pre-filter element is too large, causing it to push up the filter element cover, thereby causing water leakage at the joint between the filter bottle cover and the filter element cover, and thus leading to the failure of the composite filter element. Attached Figure Description

[0030] 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.

[0031] Figure 1 This is a schematic diagram of the structure of an embodiment of the composite filter element of the present invention;

[0032] Figure 2 for Figure 1 Exploded view with parts of the structure removed;

[0033] Figure 3 This is an exploded view of the first filtering component of the present invention;

[0034] Figure 4 This is a cross-sectional view of the composite filter element of the present invention;

[0035] Figure 5 for Figure 1 A schematic diagram of the middle section structure;

[0036] Figure 6 for Figure 5 Exploded view of the middle structure;

[0037] Figure 7 for Figure 6 Further exploded view of the mid-structure;

[0038] Figure 8 for Figure 7 Enlarged view of point A in the middle;

[0039] Figure 9 for Figure 7 Exploded view of the middle structure with the cover plate and adapter removed;

[0040] Figure 10 for Figure 7 An exploded view of the middle filter cover and adapter from another perspective;

[0041] Figure 11 for Figure 7 A structural schematic diagram of the middle cover plate from another perspective.

[0042] Explanation of icon numbers:

[0043]

[0044]

[0045]

[0046] 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

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] Please see Figures 1 to 4 In one embodiment of the present invention, the composite filter element 10 includes a filter bottle 100, a first filter assembly 200, a second filter assembly 300, a filter bottle cap 400, a filter element cap 310, and a cover plate 500. The filter bottle 100 has a receiving cavity 110; the first filter assembly 200 is disposed in the receiving cavity 110, and the second filter assembly 300 is detachably disposed in the receiving cavity 110; the filter bottle cap 400 covers the end of the filter bottle 100, and a mounting groove 410 is formed on the filter bottle cap 400, with a mounting opening 411 formed at the bottom of the mounting groove 410; the second filter assembly 300... The filter bottle cover 400 is provided with a corresponding installation port 411. The filter bottle cover 400 is also provided with at least two first water pipes 420, which are connected to the receiving cavity 110. The filter element cover 310 is detachably provided in the installation groove 410. The filter element cover 310 is provided with at least two second water pipes 312a, which are connected to the receiving cavity 110. The first water pipes 420 and the second water pipes 312a are used to connect to the external water circuit. The cover plate 500 is slidably connected to the filter bottle cover 400 and covers the filter element cover 310.

[0052] Specifically, the filter bottle 100 has a receiving cavity 110 inside, and the first filter assembly 200 and the second filter assembly 300 are disposed within the receiving cavity 110. The second filter assembly 300 is located inside the first filter assembly 200, or the first filter assembly 200 is located inside the second filter assembly 300, or the second filter assembly 300 is located on one side of the first filter assembly 200. It should be noted that the first filter assembly 200 and the second filter assembly 300 are respectively disposed in two independent chambers within the filter bottle 100, that is, the receiving cavity 110 has a first chamber 111 and a second chamber 112. The first filter assembly 200 is disposed in the first chamber 111, and the second filter assembly 300 is disposed in the second chamber 112. The filter bottle 100 is barrel-shaped with an open top, and the filter bottle cap 400 is connected to the edge of the open top and covers it.

[0053] Furthermore, both the first filter assembly 200 and the second filter assembly 300 are disposed in the receiving cavity 110 of the filter bottle 100; the second filter assembly 300 includes a pre-filter element, which filters out impurities contained in the water; the first filter assembly 200 includes a reverse osmosis filter element 210, which filters 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.

[0054] Please see Figure 2 and Figure 4 In one embodiment, the second filter assembly 300 includes a filter cover 310, filter elements (pre-filter 321 and / or post-filter 322), a water outlet pipe 330, a welding piece 340, an upper end cover 350, a lower end cover 360, a filter element handle 370, and a separator 380. The filter cover 310 is sealed to the upper end cover 350, and the filter element is disposed between the upper end cover 350 and the lower end cover 360. The filter element can be a pre-filter 321 and / or a post-filter 322. When the filter element includes both a pre-filter 321 and a post-filter 322, the pre-filter 321 and the post-filter 322 can be arranged vertically, horizontally, or internally and externally, and their specific positions are not limited. In this embodiment, the pre-filter 321 and the post-filter 322 are separated by a separator 380, so that when the second filter assembly 300 is installed in the water purification device, the separator 380 and other structures in the composite filter 10 enclose each other to form an independent first filter chamber 710 and a second filter chamber 720. The pre-filter 321 and the post-filter 322 are respectively disposed in the first filter chamber 710 and the second filter chamber 720, so that the water flow path through the pre-filter 321 and the water flow path through the post-filter 322 do not affect each other.

[0055] When the filter cartridge includes both a pre-filter 321 and a post-filter 322, the pre-filter 321, used to remove most impurities from the raw water, needs to be larger in overall volume. The water passing through the post-filter 322 has already undergone two filtrations—the pre-filter 321 and the reverse osmosis filter 210—resulting in very low solute content. Therefore, the post-filter 322 can be relatively smaller in overall volume. Arranging the pre-filter 321 and post-filter 322 vertically ensures their filtration efficiency. Specifically, the pre-filter 321 is positioned above the post-filter 322, close to the filter cover 310, while the post-filter 322 is positioned on the side of the pre-filter 321 furthest from the filter cover 310.

[0056] Please see Figure 4Both the pre-filter 321 and the post-filter 322 are hollow cylindrical. One end of the pre-filter 321 is connected to the upper end cover 350, and the other end is connected to the upper surface of the separator 380. The connection between the pre-filter 321 and the upper end cover 350 and the separator 380 is adhesive bonding to prevent water from bypassing the pre-filter 321 for filtration and flowing directly out through the connection between the pre-filter 321 and the upper end cover 350 and the separator 380. Of course, the pre-filter 321 can also be connected to the upper end cover 350 and the separator 380 in other ways, and there are no specific restrictions on this. The separator 380 can be cylindrical, and the post-filter 322 is placed inside the cylindrical separator 380, separating the pre-filter 321 and the post-filter 322. The cylindrical separator 380 has an opening at the bottom for inserting the post-filter cartridge 322, and the opening is sealed by a lower end cap 360. The post-filter cartridge 322, located inside the cylindrical separator 380, is bonded to the top and lower end cap 360 of the separator 380 to prevent water from bypassing the post-filter cartridge 322 for filtration and flowing directly out through the connection between the post-filter cartridge 322 and the top and lower end cap 360 of the separator 380. Of course, the post-filter cartridge 322 can also be connected to the top and lower end cap 360 of the separator 380 in other ways, and there are no specific restrictions on this.

[0057] Please continue reading. Figure 4 The length of the pre-filter 321 is greater than the length of the post-filter 322 to ensure the filtration effect of both the pre-filter 321 and the post-filter 322. Furthermore, the length of the pre-filter 321 is 1.5-3 times the length of the post-filter 322.

[0058] It should be noted that, in order to ensure the compactness and miniaturization of the structure of the second filter assembly 300, since the pre-filter element 321 is hollow cylindrical and the post-filter element 322 is located below the pre-filter element 321, a water outlet pipe 330 can be provided inside the pre-filter element 321. One end of the water outlet pipe 330 is connected to the water outlet side of the post-filter element 322, and the other end is connected to the water outlet channel on the filter element cover 310. This allows the water inlet channel and water outlet channel of the second filter assembly 300 to be integrated on the filter element cover 310, ensuring the compactness of the structure of the second filter assembly 300 and realizing the miniaturization of the second filter assembly 300 and the composite filter element 10 on which the second filter assembly 300 is installed. To ensure the independence of the water flow path of the post-filter 322 from that of the pre-filter 321, a corresponding sealing structure can be set to ensure the sealing of both ends of the water outlet pipe 330. For example, two welded pieces 340 are connected to the filter cover 310 and the separator 380 respectively to form a sealing groove for 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 330.

[0059] Please see Figures 2 to 4 Furthermore, the entire second filter assembly 300 is integrated, with the filter element cover 310 located on top of the entire second filter assembly 300. The filter element cover 310 is connected to the upper end cover 350. The connection between the filter element cover 310 and the upper end cover 350 can be a sealed connection, an adhesive connection, or other connection methods. The second filter assembly 300 also includes a filter element handle 370. Filter element handle mounting grooves 313 are provided on opposite sides of the filter element cover 310. The filter element handle 370 is approximately U-shaped, with filter element handle adapters 371 at both ends. The adapters 371 are located within the filter element handle mounting grooves 313 and are rotatable relative to the grooves, allowing the filter element handle 370 to rotate relative to the filter element cover 310. Considering that the filter elements, i.e., the pre-filter 321 and / or post-filter 322, have shorter service lives than the reverse osmosis filter element 210, when the filter element's service life expires, the entire second filter assembly 300 can be disassembled from the composite filter element 10 by lifting the filter element handle 370, making it convenient for the user.

[0060] Furthermore, by fixing both ends of the pre-filter element 321 with the upper end cover 350 and the lower end cover 360, the stability of the pre-filter element 321 during use can be ensured. At the same time, since the lower surface of the filter element cover 310 has a relatively complex structure and is not a smooth plane, while the upper end surface of the pre-filter element 321 is a smooth plane, the cooperation between the upper end cover 350 and the pre-filter element 321 can effectively fix the pre-filter element 321.

[0061] Please see Figures 6 to 9 Furthermore, the filter bottle cap 400 may be provided with an installation groove 410, the bottom of which forms an installation opening 411. The filter element cap 310 is detachably installed in the installation groove 410, and the installation opening 411 is used for the installation of the second filter assembly 300. The installation opening 411 corresponds to the second chamber 112. The filter element cap 310 can be an independent component, located at the installation opening 411, and detachably connected to the filter bottle cap 400. When replacing the second filter assembly 300, only the filter element cap 310 needs to be removed, and then the filter element can be replaced. Alternatively, the filter element cap 310 can be part of the second filter assembly 300, connected to the filter element. By removing the filter element cap 310, the entire filter element can be directly removed to replace the second filter assembly 300. It should be emphasized that the connection between the filter cover 310 and the filter element can be a direct connection or an indirect connection, such as a connection between the filter cover 310 and the filter element via the upper cover 350. There are no specific limitations on either method.

[0062] Please see Figure 3 and Figure 4 In one embodiment, the first filter assembly 200 includes a central tube 220 and a reverse osmosis filter element 210. The central tube 220 divides the receiving cavity 110 into a first chamber 111 and a second chamber 112. The first chamber 111 is located on the outer periphery of the second chamber 112. The reverse osmosis filter element 210 is fitted onto the outer wall of the central tube 220 and is located inside the first chamber 111. One end of the central tube 220 is open and corresponds to the mounting port 411. The second filter assembly 300 is detachably disposed in the second chamber 112 through the mounting port 411.

[0063] Furthermore, the first filtration assembly 200 also includes a reverse osmosis top cover 230 and a reverse osmosis bottom cover 240. The reverse osmosis filter element 210 is fitted onto the outer wall of the central tube 220, and the reverse osmosis filter element 210 is disposed between the reverse osmosis top cover 230 and the reverse osmosis bottom cover 240. The upper and lower ends of the reverse osmosis filter element 210 are fixed by the reverse osmosis top cover 230 and the reverse osmosis bottom cover 240. The reverse osmosis top cover 230 and the reverse osmosis bottom cover 240 are also provided with reverse osmosis filter element 210 grooves for the ends of the reverse osmosis filter element 210 to be inserted. Thus, the reverse osmosis top cover 230 and the reverse osmosis bottom cover 240 together fix the reverse osmosis filter element 210 inside the filter bottle 100.

[0064] Please see Figure 3 , Figure 4 and Figure 6Furthermore, at least two first water pipes 420 are connected to the first chamber 111, and at least two second water pipes 312a are connected to the second chamber 112. That is, water in the first chamber 111 flows in or out through the first water pipes 420, and water in the second chamber 112 flows in or out through the second water pipes 312a.

[0065] Please see Figure 9 In one embodiment, at least two first water pipes 420 include a reverse osmosis inlet pipe 421 and a wastewater outlet pipe 422, which are spaced apart. A flow channel 312 is disposed between the reverse osmosis inlet pipe 421 and the wastewater outlet pipe 422. Specifically, the reverse osmosis inlet pipe 421 and the wastewater outlet pipe 422 are spaced apart and are connected to the first chamber 111. The overall flow channel layout is reasonable, and the flow channel 312 is disposed between the reverse osmosis inlet pipe 421 and the wastewater outlet pipe 422, which can limit the position of the flow channel 312.

[0066] Furthermore, at least two second water pipes 312a include a pre-filter inlet pipe 312a1, a pure water outlet pipe 312a2, and a pre-filter outlet pipe 312a3, and the reverse osmosis inlet pipe 421, the pre-filter inlet pipe 312a1, the pure water outlet pipe 312a2, the pre-filter outlet pipe 312a3, and the wastewater outlet pipe 422 are arranged in sequence. Specifically, the reverse osmosis inlet pipe 421 is connected to the inlet side of the reverse osmosis filter element 210, the pre-filter inlet pipe 312a1 is connected to the inlet side of the pre-filter element 321, the pure water outlet pipe 312a2 is connected to the pure water outlet side of the reverse osmosis filter element 210 or the outlet side of the post-filter element 322, the pre-filter outlet pipe 312a3 is connected to the outlet side of the pre-filter element 321, and the wastewater outlet pipe 422 is connected to the wastewater outlet side of the reverse osmosis filter element 210.

[0067] Please see Figure 4The first filter assembly 200 is disposed within the receiving cavity 110, which is divided into a first chamber 111 and a second chamber 112 by a central tube 220. The first chamber 111 is located on the outer periphery of the second chamber 112. Specifically, the central tube 220 is a hollow cylindrical shape, with the second chamber 112 formed inside the central tube 220 and the first chamber 111 formed outside the hollow tube. The second filter assembly 300 is disposed within the second chamber 112. A first water passage gap 810 is formed between the pre-filter element 321 and the inner wall of the central tube 220, and the first water passage gap 810 is connected to the pre-inlet water pipe 312a1. The first filter assembly 200 is disposed within the first chamber 111, and a second water passage gap 820 is formed between the reverse osmosis filter element 210 and the inner wall of the filter bottle 100, and the second water passage gap 820 is connected to the reverse osmosis water inlet pipe 421.

[0068] When the filter element of the second filter assembly 300 includes a pre-filter element 321 and a post-filter element 322, the separator 380 divides the first chamber 111 into a first filter chamber 710 and a second filter chamber 720 that are independent of each other. The pre-filter element 321 is placed in the first filter chamber 710 and the post-filter element 322 is placed in the second filter chamber 720 to ensure that the water flow path through the pre-filter element 321 and the water flow path through the post-filter element 322 do not interfere with each other. Furthermore, a first water passage 221 can be opened at the position of the central tube 220 corresponding to the second filter chamber 720, so that the pure water filtered by the reverse osmosis filter element 210 can flow directly into the second filter chamber 720 through the second water passage 381 and be filtered again by the post-filter element 322, without having to set up a separate pipeline between the pure water outlet side of the reverse osmosis filter element 210 and the water inlet side of the post-filter element 322, thus achieving the compactness of the composite filter element 10 structure. The first water passage 221 connects the first chamber 111 and the second filter chamber 720, which further shortens the flow path between the pure water outlet side of the reverse osmosis filter element 210 and the water inlet side of the post-filter element 322, thereby improving the water output efficiency of the composite filter element 10.

[0069] Please see Figure 2 and Figure 4 Furthermore, the separator 380 is barrel-shaped, and the post-filter element 322 is disposed within the separator 380. The peripheral wall of the separator 380 forms a third water passage gap 830 with the inner wall of the first central tube 220. The peripheral wall of the separator 380 is provided with a second water passage hole 381, and the first chamber 111 communicates with the second filter chamber 720 through the first water passage hole 221 and the second water passage hole 381. By making the separator 380 barrel-shaped, it can be ensured that the post-filter element 322 disposed within the barrel-shaped separator 380 is not easily torn when it floats up and down under water pressure, thus affecting the service life of the post-filter element 322.

[0070] The composite filter element 10 proposed in this invention has the following specific flow path:

[0071] Please see Figure 4 Raw water flows into the first water passage 810 through the pre-inlet pipe 312a1. After being filtered by the pre-filter element 321, it flows out through the water outlet channel between the inner wall of the pre-filter element 321 and the outer wall of the outlet pipe 330, and then flows out through the pre-outlet pipe 312a3. The water flowing out of the pre-outlet pipe 312a3 is pressurized by the booster pump and flows into the second water passage 820 through the reverse osmosis inlet pipe 421. Water enters from the side of the reverse osmosis filter element 210 (this refers to the reverse osmosis filter element 210 using a water-saving membrane; if the reverse osmosis filter element 210 uses a regular filter membrane, water enters from the bottom of the reverse osmosis filter element 210). After being filtered by the reverse osmosis filter element 210, the water flow is divided into two paths: a pure water path and a wastewater path. The pure water flows to the post-filter element 322 for further filtration, and the wastewater flows out of the composite filter element 10 through the wastewater outlet pipe 422. The pure water first flows through the first water passage 221 on the central pipe 220 to the third water passage gap 830, and then flows through the second water passage 381 on the separator 380 to the post-filter cartridge 322 for filtration. The pure water filtered by the post-filter cartridge 322 flows from the inside of the post-filter cartridge 322 to the outlet pipe 330, and finally flows out from the pure water outlet pipe 312a2 for user use.

[0072] It should be emphasized that if the filter cartridge does not include the post-filter cartridge 322, the pure water filtered by the reverse osmosis filter cartridge 210 will flow directly out from the pure water outlet pipe 312a2 for user use.

[0073] Please see Figure 6 In one embodiment, the filter cover 310 includes a body portion 311 and a flow channel portion 312. The body portion 311 is disposed corresponding to the mounting port 411, and at least two second water passage pipes 312a are formed in the flow channel portion 312. Specifically, the filter cover 310 includes a body portion 311 and a flow channel portion 312, which are integrally formed to ensure the structural strength of the filter cover 310 and prevent it from being broken by high pressure when the composite filter element 10 is in use. At the same time, it also reduces production and installation steps and improves the production efficiency of the composite filter element 10. Furthermore, since the filter element cover 310 and the filter bottle cover 400 are detachably connected, and the integrally formed filter element cover 310 includes a body part 311 and a flow channel part 312, at least two second water passage pipes 312a are directly formed on the flow channel part 312, instead of using the flow channel docking method of the filter element cover 310 and the filter bottle cover 400, the problem of water leakage at the docking point of the filter bottle cover 400 and the filter element cover 310 is avoided, ensuring that the composite filter element 10 will not fail during use.

[0074] Please see Figures 7 to 9In one embodiment, the bottom of the mounting groove 410 has an upwardly protruding positioning rib 412, and the flow channel 312 is provided with a positioning opening 312b that cooperates with the positioning rib 412. Specifically, when the filter element cover 310 is installed into the mounting groove 410 on the filter bottle cover 400, in order to facilitate the precise positioning of the filter element cover 310, a positioning rib 412 is provided upwardly protruding from the bottom of the mounting groove 410, and the flow channel 312 is provided with a positioning opening 312b that cooperates with the positioning rib 412 to position the filter element cover 310. At the same time, since the positioning rib 412 is formed by the upwardly protruding bottom of the mounting groove 410, the filter element cover 310 should also be installed from top to bottom into the mounting groove 410 when it is installed, and the installed filter element cover 310 will not move within the mounting groove 410 due to the limiting effect of the positioning rib 412.

[0075] Please see Figure 9 and Figure 10 Furthermore, multiple positioning ports 312b are provided, which are located on the lower side of the flow channel portion 312 and on opposite sides of the second water pipe 312a along its extension direction. Multiple positioning ribs 412 are also provided, each corresponding to one of the multiple positioning ports 312b. The design of multiple positioning ports 312b and positioning ribs 412 further enhances the limiting effect on the filter cover 310.

[0076] Please see Figure 8 In one embodiment, a locking block 312c is provided on at least one side of the flow channel portion 312, and a locking slot 420a is provided on the first water passage pipe 420, with the locking block 312c engaging with the locking slot 420a. Specifically, a locking block 312c is also provided on the side of the flow channel portion 312, and a locking slot 420a is provided on the first water passage pipe 420 to engage with the locking block 312c. This limits and fixes the relative positions of the first water passage pipe 420 and the second water passage pipe 312a, preventing the positions of the first water passage pipe 420 and the second water passage pipe 312a from moving under force. Preferably, there are two locking blocks 312c, respectively located on opposite sides of the flow channel portion 312, with the locking slot 420a corresponding to the locking block 312c.

[0077] Please see Figure 8In one embodiment, the locking block 312c includes a connecting portion 312c1 and a engaging portion 312c2 connected to the connecting portion 312c1. A locking groove 312c3 is formed between the connecting portion 312c1 and the engaging portion 312c2, and the locking groove 312c3 engages with the peripheral wall of the locking opening 420a. Specifically, the locking groove 312c3 is formed between the connecting portion 312c1 and the engaging portion 312c2, and the locking groove 312c3 engages with the peripheral wall of the locking opening 420a to further improve the locking effect between the locking block 312c and the locking opening 420a, improve the stability of the connection between the filter element cover 310 and the filter bottle cover 400, and prevent the filter element cover 310 from coming off the locking opening 420a when subjected to a large upward force.

[0078] Please see Figures 8 to 10 In one embodiment, the engaging portion 312c2 extends into the bayonet 420a, and the engaging portion 312c2 has an arcuate surface similar in shape to the inner wall of the first water pipe 420. Specifically, since the engaging portion 312c2 extends into the bayonet 420a, that is, the engaging portion 312c2 occupies the internal space of the first water pipe 420, and the end of the first water pipe 420 is also used to connect the adapter 600, therefore, setting the portion of the engaging portion 312c2 that extends into the bayonet 420a to have an arcuate surface similar in shape to the inner wall of the first water pipe 420 facilitates the connection of the adapter 600 and does not occupy the internal space of the first water pipe 420.

[0079] Please see Figure 6 and Figure 11 In one embodiment, the composite filter element 10 further includes a cover plate 500, which is slidably connected to the filter bottle cap 400 and covers the filter element cover 310. Specifically, the outer cover plate 500 covers the entire filter bottle cap 400 and the filter element cover 310. On the one hand, it can prevent dust and other particles from entering the gap between the filter element cover 310 and the filter bottle cap 400, and also ensure the consistency of the appearance of the filter element assembly. On the other hand, the outer cover plate 500 covering the entire filter element cover 310 can also press the filter element cover 310, limiting the filter element cover 310 in the vertical direction, so as to prevent the filter element cover 310 from being pushed upward when subjected to a large upward force, thus affecting the use of the composite filter element 10.

[0080] Please continue reading. Figure 6 and Figure 11In one embodiment, the cover plate 500 is provided with an abutting structure 510 that abuts against the flow channel portion 312. Specifically, the abutting structure 510 abuts against the flow channel portion 312 of the filter cover 310 when the filter cover 310 as a whole tends to detach from the mounting groove 410, thereby suppressing the tendency of the filter cover 310 to detach. The abutting structure 510 includes a mounting portion 511 and a plurality of abutting portions 512 disposed on the mounting portion 511. The length direction of the abutting portions 512 is parallel to the sliding direction of the cover plate 500, so that the abutting portions 512 are less likely to interfere with the sliding process of the cover plate 500. The mounting portion 511 is disposed on the bottom surface of the cover plate 500, and the plurality of abutting portions 512 are evenly spaced on the surface of the mounting portion 511 away from the cover plate 500. When the filter cover 310 tends to detach from the mounting groove 410, the abutting portions 512 will abut against the flow channel portion 312, thereby suppressing the tendency of the filter cover 310 to detach.

[0081] To ensure the effective contact between the contact part 512 and the flow channel part 312, a contact strip 512a is provided along the length of the contact part 512. The contact strip 512a can be made of a rigid material, such as rigid plastic, or a soft material such as rubber. The contact strip 512a will contact the flow channel part 312 when the filter cover 310 tends to come off, thereby suppressing the tendency of the filter cover 310 to come off. It should be noted that when the composite filter element 10 is not filled with water, a buffer gap is left between the contact strip 512a and the flow channel part 312. The buffer gap provides a certain amount of room for the filter cover 310 to move, avoiding direct contact between the contact structure 510 and the filter cover 310 during the installation of the composite filter element 10. This facilitates the installation of the cover plate 500 and reduces the possibility of the cover plate 500 or the filter cover 310 being damaged due to excessive stress during the installation process.

[0082] Please see Figure 9It should be noted that, due to the presence of a pre-inlet pipe 312a1, a pre-outlet pipe 312a3, and a pure water outlet pipe 312a2 on the flow channel 312, for ease of processing, there will be natural recesses between the pre-inlet pipe 312a1 and the pure water outlet pipe 312a2, and between the pre-outlet pipe 312a3 and the pure water outlet pipe 312a2. The abutment strip 512a on the contact part 512 will abut against the recesses on the flow channel 312. That is, after the cover plate 500 is installed, the position of the contact part 512 will be aligned with the recesses on the flow channel 312, thereby directly forming a buffer gap using the recesses on the flow channel 312. Furthermore, to match the shape of the recesses on the flow channel 312, the abutment strip 512a is vertically... The projection of the plane perpendicular to the sliding direction of the cover plate 500 is semi-circular, thus ensuring the contact effect of the contact strip 512a on the flow channel 312; in addition, the wastewater outlet pipe 422 and the reverse osmosis inlet pipe 421 mentioned above are arranged in parallel with the pre-inlet pipe 312a1, the pre-outlet pipe 312a3 and the pure water outlet pipe 312a2 on the flow channel 312, so there will be a natural depression between the wastewater outlet pipe 422 and the reverse osmosis inlet pipe 421 and the flow channel 312. The contact part 512 can also be used to contact the depression between the wastewater outlet pipe 422 and the reverse osmosis inlet pipe 421 and the flow channel 312, thereby suppressing the tendency of the filter cover 310 to fall off during the filtration process of the composite filter element 10.

[0083] Based on the above description, although there is a buffer gap between the contact strip 512a and the flow channel 312, after the composite filter element 10 has finished filtering, that is, after the filter element cover 310 and the cover plate 500 have come into contact, the filter element cover 310 may not fall back down. If the cover plate 500 is removed for some reason at this time, it will be difficult to reinstall the cover plate 500 because the filter element cover 310 has been pushed out. Therefore, in order to further reduce the assembly difficulty of the cover plate 500, the end of the contact strip 512a is provided with a contact slope. During the installation of the cover plate 500, as the cover plate 500 slides, the contact slope will apply pressure to the flow channel 312, thereby forcing the filter element cover 310 to fall back down, so that the filter element cover 310 as a whole no longer obstructs the sliding process of the cover plate 500. Thus, the setting of the contact slope reduces the overall installation difficulty of the cover plate 500.

[0084] Please see Figure 11In one embodiment, the cover plate 500 extends and bends on opposite sides to form mating portions 520, which slide in engagement with the filter bottle cover 400. Specifically, the sliding direction of the mating portions 520 is parallel to the top surface of the cover plate 500, so that the sliding of the mating portions 520 can cause relative displacement between the top surface and the filter bottle cover 400. Thus, the sliding engagement between the mating portions 520 and the filter bottle cover 400 can determine whether the cover plate 500 blocks the filter element cover 310. That is, when it is necessary to remove the filter assembly from the filter bottle 100, the cover plate 500 can be slid open to avoid the cover plate 500 obstructing the disassembly and assembly of the filter assembly. After disassembly and assembly, the sliding engagement between the mating portions 520 and the filter bottle cover 400 can be used to allow the cover plate 500 to block the filter bottle cover 400 and the filter element cover 310 again, thereby reducing the possibility of dust and other fine impurities entering the interior of the composite filter element 10 through the gap between the filter bottle cover 400 and the filter element cover 310.

[0085] Please see Figure 11 In this embodiment, a sliding part 530 is provided at the bottom of the mating part 520, and a sliding groove 430 is provided on the filter bottle cover 400 for the sliding part 530 to slide. Specifically, the mating of the sliding part 530 and the sliding groove 430 will complete the sliding fit between the cover plate 500 and the filter bottle cover 400.

[0086] Furthermore, a latching platform 540 is formed on the opposite side of the two sliding parts 530, and a latching groove 431 that cooperates with the latching platform 540 is provided on one side of the sliding groove 430. The cooperation between the latching platform 540 and the latching groove 431 is used to restrict the movement of the cover plate 500 in the axial direction of the composite filter element 10. Specifically, in order to allow the cover plate 500 to slide on the filter bottle cover 400 while reducing the possibility of the cover plate 500 falling off the filter bottle cover 400 after installation and losing its covering function, a latching platform 540 is formed on the opposite sides of the two sliding parts 530. A latching groove 431 that mates with the latching platform 540 is provided on one side of the sliding groove 430. When the sliding part 530 mates with the sliding groove 430, the latching platform 540 also mates with the latching groove 431. That is, the latching platform 540 slides within the latching groove 431 as the sliding part 530 slides within the sliding groove 430. When the sliding part 530 and the sliding groove 430 are fully engaged, the latching platform 540 and the latching groove 431 also mate. The engagement of groove 431 restricts the movement of cover plate 500 in the axial direction of composite filter element 10. Simply put, the engagement of fastening platform 540 and fastening groove 431 restricts the up-and-down movement of cover plate 500, so that cover plate 500 can only be removed from filter element cover 310 by sliding. This improves the stability of cover plate 500 after installation, ensures the shielding effect of cover plate 500 on filter element cover 310, and limits filter element cover 310 in the axial direction (i.e., up-and-down direction) of composite filter element 10 by cover plate 500, preventing filter element cover 310 from moving upward, avoiding misalignment at the flow channel docking point of filter element cover 310 and filter bottle cover 400, and preventing water leakage at the connection between filter element cover 310 and filter bottle cover 400.

[0087] Please see Figure 1 , Figures 5 to 8 In one embodiment, the composite filter element 10 further includes a plurality of adapters 600, which are plugged into the ends of at least two first water inlet pipes 420 and at least two second water inlet pipes 312a. Specifically, five adapters 600 are provided, and are respectively connected to the reverse osmosis inlet pipe 421, the pre-filter inlet pipe 312a1, the pure water outlet pipe 312a2, the pre-filter outlet pipe 312a3, and the wastewater outlet pipe 422. When only the position of the pre-filter element 321 or the post-filter element 322, or both, changes, the number of adapters 600 can also change according to the specific arrangement of the pre-filter element 321 and / or the post-filter element 322. The adapters 600 are used to switch the outlet direction of the first water inlet pipe 420 and the second water inlet pipe 312a on the filter element cover 310 and connect them to external water passages or pipelines.

[0088] Please see Figure 8Furthermore, the ends of the first water pipe 420 and the second water pipe 312a are provided with anti-rotation notches 610, and the adapter 600 is provided with an anti-rotation part 620, which is matched with the anti-rotation notch 610. This is designed to prevent the adapter 600 from rotating relative to the first water pipe 420 or the second water pipe 312a after it is connected, thus preventing it from affecting the stability of the connection to other external pipes.

[0089] The technical solution of the present invention is to make the filter element cover 310 detachably connected to the filter bottle cover 400, and to integrate the first water pipe 420, which communicates with the receiving cavity 110 in the filter bottle 100, onto the filter bottle cover 400, and the second water pipe 312a, which is integrated onto the filter element cover 310. This avoids the situation where, during the use of the composite filter element 10, the upward buoyancy of the pre-filter element 321 is too large, causing it to push up the filter element cover 310, which would lead to water leakage at the joint between the filter bottle cover 400 and the filter element cover 310, and thus cause the composite filter element 10 to fail.

[0090] 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.

[0091] 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 comprises: a filter bottle having a containing cavity; a first filter assembly arranged in the containing cavity, a second filter assembly arranged in the containing cavity in a detachable manner; a filter bottle cover covering an end of the filter bottle, the filter bottle cover being provided with a mounting groove, a mounting opening being formed in a groove bottom of the mounting groove, the second filter assembly being arranged corresponding to the mounting opening, the filter bottle cover being further provided with at least two first water pipes, the at least two first water pipes being in communication with the containing cavity; a filter element cover arranged in the mounting groove in a detachable manner, the filter element cover being provided with at least two second water pipes, the at least two second water pipes being in communication with the containing cavity, wherein the first water pipes and the second water pipes are used to communicate with external water lines; the filter element cover comprises a body part and a flow channel part, the body part being arranged corresponding to the mounting opening, the at least two second water pipes being formed in the flow channel part; and a cover plate being in sliding connection with the filter bottle cover, the cover plate covering the filter element cover, the cover plate being provided with an abutting structure abutting against the flow channel part, the abutting structure comprising a mounting part and a plurality of abutting parts, the abutting parts being parallel to a sliding direction of the cover plate in a length direction, the mounting part being arranged on a bottom surface of the cover plate, the abutting parts being arranged on a surface of the mounting part away from the cover plate; the abutting parts being provided with abutting strips, projections of the abutting strips in a plane perpendicular to the sliding direction of the cover plate being semicircular, end portions of the abutting strips being provided with contact inclined surfaces.

2. The composite filter element of claim 1 wherein, a positioning rib being upwardly protruded from a groove bottom of the mounting groove, the flow channel part being provided with positioning openings cooperating with the positioning rib.

3. The composite filter element of claim 2 wherein, the positioning openings being provided in a plurality, the positioning openings being provided on a lower side of the flow channel part and located on opposite sides of the second water pipes along an extending direction of the second water pipes, the positioning ribs being provided in a plurality, the positioning ribs corresponding to the positioning openings in a one-to-one manner.

4. The composite filter element of claim 1 wherein, at least one side of the flow channel part being provided with a clamping block, the first water pipes being provided with clamping openings, the clamping block being in clamping cooperation with the clamping openings.

5. The composite filter element of claim 4 wherein, the clamping block comprising a connecting part and a clamping part connected with the connecting part, a clamping groove being formed between the connecting part and the clamping part, the clamping groove being in clamping cooperation with a peripheral wall of the clamping opening.

6. The composite filter element of claim 5 wherein, the clamping part extending into the clamping opening, the clamping part having an arc surface similar to a shape of an inner wall surface of the first water pipe.

7. The composite filter element of claim 1 wherein, the body part and the flow channel part being integrally formed.

8. The composite filter element of claim 1 wherein, opposite sides of the cover plate being extended and bent to form cooperating parts, the cooperating parts being in sliding cooperation with the filter bottle cover.

9. The composite filter element of claim 8 wherein, bottom portions of the cooperating parts being provided with sliding parts, the filter bottle cover being provided with sliding grooves for the sliding parts to slide.

10. The composite filter element of claim 9 wherein, opposite side surfaces of the sliding parts being provided with buckling tables, one side surface of the sliding grooves being provided with buckling grooves cooperating with the buckling tables, the buckling tables and the buckling grooves being used to limit movement of the cover plate in an axial direction of the composite filter element.

11. The composite filter element of any one of claims 1 to 7, wherein, the at least two first water pipes comprising a reverse osmosis water inlet pipe and a waste water outlet pipe, the reverse osmosis water inlet pipe and the waste water outlet pipe being arranged in a spaced manner, the flow channel part being arranged between the reverse osmosis water inlet pipe and the waste water outlet pipe.

12. The composite filter element of claim 11 wherein, The at least two second water pipes include a front water inlet pipe, a pure water outlet pipe and a front water outlet pipe, and the reverse osmosis water inlet pipe, the front water inlet pipe, the pure water outlet pipe, the front water outlet pipe and the waste water outlet pipe are sequentially arranged.

13. The composite filter element of any one of claims 1 to 7, wherein The first filter assembly includes a center pipe and a reverse osmosis filter core, the center pipe divides the containing cavity into a first chamber and a second chamber, the first chamber is located at the outer periphery of the second chamber, the reverse osmosis filter core is sleeved on the outer wall surface of the center pipe and located in the first chamber, one end of the center pipe is open and corresponds to the mounting port; the second filter assembly is detachably arranged in the second chamber through the mounting port.

14. The composite filter element of claim 13, wherein, The at least two first water pipes are in communication with the first chamber, and the at least two second water pipes are in communication with the second chamber.

15. The composite filter element of any one of claims 1 to 7, wherein, The composite filter core further includes a plurality of adapters, the plurality of adapters are in plug-in connection with the end portions of the at least two first water pipes and the at least two second water pipes.

16. The composite filter element of claim 15, wherein, The end portions of the first water pipe and the second water pipe are provided with anti-rotation notches, the adapters are provided with anti-rotation portions, and the anti-rotation portions and the anti-rotation notches are in limiting cooperation.

17. An apparatus having a water purification function, characterized by comprising: The composite filter core as claimed in any one of claims 1 to 16.

18. The apparatus having a water purification function according to claim 17, wherein, The device with the water purification function is any one of a purifier, a water purifier, a water dispenser, a pure water machine, an ice maker, a soft purifier integrated machine or a purifier integrated machine.

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