Filter cartridge assembly, water purifying device and flow guide

Abstract

The application discloses a filter element assembly, a water purifying device and a flow guide. The filter element assembly comprises a shell, a flow guide, a cylinder, a first filter element and a second filter element. The shell has a containing cavity, a first water inlet, a first water outlet, a second water inlet and a second water outlet which are communicated with the containing cavity. The flow guide is an integral structure and has a flow guide channel formed inside. The cylinder is sleeved outside the flow guide. A first cavity is formed between the inner wall of the cylinder and the outer wall of the flow guide. The first cavity is isolated from the flow guide channel. A second cavity is formed between the outer wall of the cylinder and the inner wall of the shell. The second cavity is communicated with the flow guide channel. The first water inlet and the first water outlet are communicated with the first cavity. The second water inlet is communicated with the second cavity. The second water outlet is communicated with the flow guide channel. The first filter element is arranged in the first cavity. The second filter element is arranged in the second cavity. The application can provide a filter element assembly with simple structure and good filtering effect.

Description

Technical Field

[0001] This invention relates to the field of water purification electrical appliances, and in particular to a filter element assembly, a water purification device, and a flow guide. Background Technology

[0002] In related technologies, the pre-filter and post-filter of water purification devices are set separately to achieve the same or different filtration functions. When the user replaces the filter, both filters need to be replaced at the same time, which is more complicated. Moreover, since the two filters are set separately, external pipes are required to connect the outlet and inlet of the two filters, making the filter assembly and the piping of the water purification equipment complicated. In other words, the structure of the filter assembly is complicated and inconvenient to use. Summary of the Invention

[0003] The main objective of this invention is to provide a filter cartridge assembly, a water purification device, and a flow guide, aiming to offer a filter cartridge assembly with a simple structure and good filtration effect.

[0004] To achieve the above objectives, the present invention provides a filter element assembly, which includes:

[0005] The outer shell has a receiving cavity, and one end of the outer shell is provided with a mounting part, the mounting part having a first water inlet, a first water outlet, a second water inlet and a second water outlet communicating with the receiving cavity;

[0006] A flow guide is disposed within the receiving cavity, and the flow guide is an integral structure with a flow channel formed inside;

[0007] A cylindrical body is disposed within the receiving cavity and sleeved outside the flow guide. A first chamber is formed between the inner wall of the cylindrical body and the outer wall of the flow guide. The first chamber is isolated from the flow guide channel. A second chamber is formed between the outer wall of the cylindrical body and the inner wall of the outer shell. The second chamber is connected to the flow guide channel. The first water inlet and the first water outlet are connected to the first chamber. The second water inlet is connected to the second chamber. The second water outlet is connected to the flow guide channel.

[0008] A first filter element is disposed within the first chamber and sleeved outside the flow guide element; and

[0009] The second filter element is disposed in the second chamber and sleeved on the outside of the cylinder.

[0010] In one embodiment, a first flow channel is formed between the first filter element and the inner wall of the cylinder, and a second flow channel is formed between the first filter element and the outer wall of the guide element. The first flow channel is connected to one of the first inlet and the first outlet, and the second flow channel is connected to the other of the first inlet and the first outlet.

[0011] In one embodiment, the filter element assembly further includes a third filter element disposed in the first chamber for filtering water flowing into the first chamber, wherein the first inlet, the third filter element, and the first filter element are arranged sequentially along the axial direction of the housing.

[0012] In one embodiment, the third filter element is sleeved outside the flow guide element, and the third filter element has a first channel that connects the first water inlet and the first flow channel.

[0013] In one embodiment, the third filter element includes a first filter housing and a first filter unit. The first filter housing has a first filter cavity arranged in an annular shape and a first water inlet and a first water outlet communicating with the first filter cavity. The first filter unit is disposed in the first filter cavity, and the first water inlet, the first filter cavity and the first water outlet are sequentially connected to form the first channel.

[0014] In one embodiment, the first filter housing includes a first upper cover and a first lower cover arranged in an annular configuration. The first upper cover is detachably mounted on the first lower cover to enclose and form the first filter cavity arranged in an annular configuration. The top wall of the first upper cover is provided with a plurality of first water inlet holes extending radially therefrom and distributed circumferentially thereon. The bottom wall of the first lower cover is provided with a plurality of first water outlet holes extending radially therefrom and distributed circumferentially thereon.

[0015] In one embodiment, the filter element assembly further includes a fourth filter element disposed in the second chamber. The fourth filter element is located at the end of the cylinder away from the second water inlet and is sleeved on the outside of the cylinder. The fourth filter element has a second channel that connects the second chamber and the flow channel. The end of the fourth filter element near the second water inlet is sealed to the outer peripheral wall of the cylinder by a sealing member.

[0016] In one embodiment, a first annular protrusion is provided on the outer wall of the cylinder near the fourth filter element, and a first annular groove for holding the seal is provided on the first annular protrusion.

[0017] In one embodiment, the end of the guide member away from the second water inlet cooperates with the outer shell to form a liquid passage connecting the second channel and the first flow channel, and the liquid passage is provided with a valve body that unidirectionally flows from the second channel to the first flow channel.

[0018] In one embodiment, the liquid passage includes a third channel and a fourth channel. The third channel is located on the bottom wall of the receiving cavity away from the first water inlet, and the fourth channel is located on the flow guide. The second channel, the third channel, the fourth channel and the first flow channel are connected in sequence, and the valve body is located in the fourth channel.

[0019] In one embodiment, the third channel includes a plurality of liquid-passing grooves disposed on the bottom wall of the receiving cavity, and the fourth channel includes a second sub-guide channel and a third sub-guide channel that are sequentially connected to the liquid-passing grooves. The valve body is disposed in the third sub-guide channel. When the water pressure in the second sub-guide channel is greater than the water pressure in the first flow channel, the valve body unilaterally guides the water path from the second sub-guide channel to the first flow channel.

[0020] In one embodiment, the flow guide includes:

[0021] The guide pipe section has a first sub-guide channel communicating with the second outlet; and

[0022] A liquid-passing pipe section is located at one end of the guide pipe section away from the second outlet. The liquid-passing pipe section has a second sub-guide channel that connects the second chamber and the first sub-guide channel. A third sub-guide channel that connects to the second sub-guide channel is provided on the outer wall of the liquid-passing pipe section. The third sub-guide channel is used for valve body installation. The guide pipe section and the liquid-passing pipe section are integrally formed.

[0023] In one embodiment, the edge of the liquid-passing pipe section near one end of the flow-guiding pipe section is provided with an extension portion. The extension portion extends toward one side of the flow-guiding pipe section and surrounds the liquid-passing pipe section and the flow-guiding pipe section to form an annular mounting groove for mounting the first filter element. The length of the extension portion along the axial direction of the flow-guiding element is less than the length of the flow-guiding pipe section.

[0024] In one embodiment, the inner diameter of the liquid passage section is larger than the outer diameter of the flow guide section;

[0025] And / or, the maximum inner diameter of the guide pipe section is D1, wherein D1 satisfies: 8mm≤D1≤16mm.

[0026] The present invention also proposes a water purification device, which includes a body and a filter element assembly as described above, wherein the filter element assembly is disposed within the body.

[0027] The present invention also proposes a flow guide, which is applied to the filter element assembly as described above, the filter element assembly having a second chamber and a second outlet, the flow guide comprising:

[0028] The diversion pipe section has a first sub-diversion channel; and

[0029] A liquid-passing pipe section is provided at one end of the flow guide pipe section. The liquid-passing pipe section has a second sub-flow guide channel communicating with the first sub-flow guide channel. A third sub-flow guide channel communicating with the second sub-flow guide channel is provided on the outer wall of the liquid-passing pipe section. The third sub-flow guide channel is used for valve body installation. The flow guide pipe section and the liquid-passing pipe section are integrally formed. The inner diameter of the liquid-passing pipe section is larger than the outer diameter of the flow guide pipe section. The first sub-flow guide channel and the second sub-flow guide channel are connected to guide the liquid in the second chamber to the second outlet.

[0030] In one embodiment, the edge of the liquid-passing pipe section near one end of the guide pipe section is provided with an extension, the extension extends toward one side of the guide pipe section and surrounds the liquid-passing pipe section and the guide pipe section to form an annular mounting groove, and the length of the extension along the axial direction of the guide member is less than the length of the guide pipe section.

[0031] And / or, the outer peripheral wall of the liquid passage section is provided with a second annular groove for holding the seal, and the second annular groove, the third sub-guide channel and the first sub-guide channel are arranged sequentially along the axial direction of the guide.

[0032] In one embodiment, the depth of the third sub-channel is greater than the thickness of the wall of the liquid-passing pipe section;

[0033] And / or, the maximum inner diameter of the guide pipe section is D1, wherein D1 satisfies: 8mm≤D1≤16mm.

[0034] The filter element assembly of the present invention includes a shell, a flow guide, a cylindrical body, a first filter element, and a second filter element. The flow guide is disposed within the receiving cavity of the shell and is an integral structure with a flow channel formed inside. The cylindrical body is disposed within the receiving cavity and sleeved over the flow guide. A first chamber is formed between the inner wall of the cylindrical body and the outer wall of the flow guide, and the first chamber is isolated from the flow channel. A second chamber is formed between the outer wall of the cylindrical body and the inner wall of the shell, and the second chamber communicates with the flow channel. The first filter element is disposed within the first chamber and sleeved over the flow guide, and the second filter element is disposed within the second chamber and sleeved over the cylindrical body. When water flows into the first chamber from the first inlet and is filtered by the first filter element, the filtered water can flow out from the first outlet. Water flows out through the outlet; when water flows into the second chamber from the second inlet and is filtered by the second filter element, the filtered water can flow directly out from the second outlet along the guide channel. The first chamber and the guide channel are isolated from each other, and the first and second chambers are set separately. The filtration processes inside the first and second chambers are independent of each other, ensuring the reliability of the filter element assembly. Furthermore, the first and second filter elements are combined in one shell, which simplifies the piping of the filter element assembly in the water purification device, making the water purification device occupy less space. Replacing one filter element assembly achieves the purpose of replacing two filter elements, thus reducing the frequency of filter element assembly replacement. In addition, since the second chamber is formed by the outer wall of the cylinder and the inner wall of the shell, the second chamber has a longer axial length in the cylinder. The second filter element set in the second chamber can have a longer distance in the axial direction of the cylinder, thus increasing the length of water passing through the second filter element and improving the filtration effect of the second filter element. In addition, the flow channel is directly formed by an integral flow guide component, which allows the flow channel of the flow guide component to directly guide the liquid in the second chamber to the second outlet. The water flow channel in the filter element assembly is easy to form, which helps to simplify the internal structure of the filter element assembly and reduce the assembly difficulty and manufacturing cost of the filter element assembly. Attached Figure Description

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the structure of the filter element assembly of the present invention in the first embodiment;

[0037] Figure 2 for Figure 1 A schematic diagram of the structure after structural decomposition;

[0038] Figure 3 for Figure 1 A sectional view of the structure in the middle;

[0039] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0040] Figure 5 for Figure 3 A schematic diagram of water flow when the valve body is not open;

[0041] Figure 6 for Figure 3 A schematic diagram showing water flow when the valve body is open;

[0042] Figure 7 for Figure 3 A schematic diagram of the flow guide component in the middle;

[0043] Figure 8 for Figure 7 A sectional view of the structure in the middle;

[0044] Figure 9 for Figure 3 A schematic diagram of the structure of the third filter element in the process;

[0045] Figure 10 for Figure 9 A sectional view of the structure in the middle;

[0046] Figure 11 for Figure 3 A schematic diagram of the structure of the cylinder;

[0047] Figure 12 for Figure 11 A sectional view of the structure in the middle;

[0048] Figure 13 for Figure 3 A cross-sectional view of the fourth filter element in the image;

[0049] Figure 14 This is a cross-sectional view of a second embodiment of the filter element assembly of the present invention;

[0050] Figure 15 This is a cross-sectional view of a third embodiment of the filter element assembly of the present invention;

[0051] Figure 16 This is a cross-sectional view of a fourth embodiment of the filter cartridge assembly of the present invention.

[0052] Explanation of icon numbers:

[0053]

[0054]

[0055] 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

[0056] 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.

[0057] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0058] 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. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. 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.

[0059] This invention proposes a filter element assembly, a water purification device including the filter element assembly, and a flow guide component applied in the filter element assembly. The filter element assembly has a simple structure and good filtration effect.

[0060] Please see Figures 1 to 3In one embodiment of the filter element assembly 10 of the present invention, the filter element assembly 10 includes a housing 100, a flow guide 200, a cylindrical body 300, a first filter element 400, and a second filter element 500. The housing 100 has a receiving cavity 110, and one end of the housing 100 is provided with a mounting portion. The mounting portion forms a first inlet 120, a first outlet 130, a second inlet 140, and a second outlet 150 communicating with the receiving cavity 110. The flow guide 200 is disposed in the receiving cavity 110, and the flow guide 200 is an integral structure with a flow channel 201 formed inside. The cylindrical body 300 is disposed in the receiving cavity 110 and sleeved on the outside of the flow guide 200. The inner wall of the cylindrical body 300 is flush with the flow guide 200. A first chamber 101 is formed between the outer walls of the cylinder 300 and the inner wall of the outer shell 100. The first chamber 101 is isolated from the flow channel 201. A second chamber 102 is formed between the outer wall of the cylinder 300 and the inner wall of the outer shell 100. The second chamber 102 is connected to the flow channel 201. The first inlet 120 and the first outlet 130 are connected to the first chamber 101. The second inlet 140 is connected to the second chamber 102. The second outlet 150 is connected to the flow channel 201. A first filter element 400 is disposed in the first chamber 101 and sleeved on the outside of the flow element 200. A second filter element 500 is disposed in the second chamber 102 and sleeved on the outside of the cylinder 300.

[0061] It is understood that a receiving cavity 110 is formed within the outer casing 100, which is used to house the first filter element 400 and the second filter element 500. To ensure that the first filter element 400 and the second filter element 500 have a large size and filtration path, the outer casing 100 can be configured as a cuboid or cylindrical structure. Of course, in other embodiments, the outer casing 100 can also be an irregular shape, so that the outer casing 100 can be fitted into the internal structure of the water purification device, thereby achieving the purpose of saving space.

[0062] In this embodiment, the first water inlet 120, the first water outlet 130, the second water inlet 140, and the second water outlet 150 are located at the same end of the outer casing 100. Specifically, one end of the outer casing 100 is provided with a mounting portion, which can protrude beyond the end face of the outer casing 100, or it can be located inside the outer casing 100. The mounting portion forms the first water inlet 120, the first water outlet 130, the second water inlet 140, and the second water outlet 150, which communicate with the receiving cavity 110. The mounting portion is used to connect the water supply and drainage structures of the water purification device.

[0063] The mounting part and the outer casing 100 can be integrally formed, with the mounting part formed at the end of the outer casing 100. This results in better sealing of the outer casing 100 and lower manufacturing costs. Alternatively, the mounting part and the outer casing 100 can be independent components. The mounting part is mounted on the outer casing 100 by a locking member, or the mounting part is itself snapped into the outer casing 100, with a sealed connection between the two. In this way, the outer casing 100 and the mounting part are independent parts, which is beneficial for the assembly of the filter element assembly 10.

[0064] Furthermore, the flow guide 200 is a one-piece structure, with a flow channel 201 formed inside. In other words, the flow guide 200 is a single part, and the flow channel 201 is directly formed within the flow guide 200 itself. The flow guide 200 can be integrally injection molded, integrally stamped, or formed by other methods; specific methods are not limited here. The flow channel 201 formed by this single part has a stable structure and also helps to reduce the volume of the flow guide 200 within the cylinder 300, thereby increasing the space occupied by the first filter element 400 within the cylinder 300. In this design, the flow guide 200 has a simple structure and is easy to manufacture, which helps to simplify the internal structure of the filter element assembly 10.

[0065] In addition, two independent filter elements are provided in the receiving cavity 110, namely the first filter element 400 and the second filter element 500. The flow guide 200, the cylinder 300 and the outer shell 100 cooperate to separate the first filter element 400 and the second filter element 500. The first filter element 400 and the second filter element 500 can achieve the same or different filtration functions. This application integrates the first filter element 400 and the second filter element 500 into the interior of a filter element assembly 10, thereby forming a pre-filter plus post-filter composite filter element. In this way, when the user needs to replace the filter element assembly 10, the user only needs to replace it once to meet the usage requirements, making the operation simpler and more convenient to use. In addition, a filter element assembly 10 also helps to save the installation space inside the water purification device.

[0066] The filter element assembly 10 of the present invention includes a housing 100, a flow guide 200, a cylindrical body 300, a first filter element 400, and a second filter element 500. The flow guide 200 is disposed within the receiving cavity 110 of the housing 100. The flow guide 200 is an integral structure and has a flow channel 201 formed inside. The cylindrical body 300 is disposed within the receiving cavity 110 and sleeved around the flow guide 200. A first chamber 10 is formed between the inner wall of the cylindrical body 300 and the outer wall of the flow guide 200. 1. The first chamber 101 is isolated from the guide channel 201. A second chamber 102 is formed between the outer wall of the cylinder 300 and the inner wall of the outer shell 100. The second chamber 102 is connected to the guide channel 201. The first filter element 400 is disposed in the first chamber 101 and sleeved on the outside of the guide element 200. The second filter element 500 is disposed in the second chamber 102 and sleeved on the outside of the cylinder 300. When water flows into the first chamber 101 from the first inlet 120 and passes through... After filtration by the first filter element 400, the filtered water can flow out from the first outlet 130. When water flows into the second chamber 102 from the second inlet 140 and is filtered by the second filter element 500, the filtered water can flow directly out from the second outlet 150 along the guide channel 201. The first chamber 101 and the guide channel 201 are isolated from each other, and the first chamber 101 and the second chamber 102 are set separately. The first chamber 101 and the second chamber 102 are independent of each other, and the filtration process inside each chamber will not affect each other, ensuring the reliability of the filter element assembly 10. Furthermore, the first filter element 400 and the second filter element 500 are combined in a housing 100, which helps to simplify the pipes for installing the filter element assembly 10 in the water purification device, making the water purification device with the filter element assembly 10 occupy less space. Moreover, replacing one filter element assembly 10 can achieve the purpose of replacing two filter elements, thus reducing the number of times the filter element assembly 10 needs to be replaced. Furthermore, since the second chamber 102 is formed by the outer wall of the cylinder 300 and the inner wall of the outer shell 100, the second chamber 102 has a relatively long length in the axial direction of the cylinder 300. This allows the second filter element 500, located within the second chamber 102, to have a longer distance in the axial direction of the cylinder 300. This increases the length of water passing through the second filter element 500, improving its filtration efficiency. In addition, the flow channel 201 is directly formed by the integral flow guide 200, enabling the flow channel 201 to directly guide the liquid in the second chamber 102 to the second outlet 150. This facilitates the formation of water flow channels within the filter element assembly 10, simplifying its internal structure and reducing assembly difficulty and manufacturing costs.

[0067] Please see Figures 3 to 6In one embodiment, a first flow channel 410 is formed between the first filter element 400 and the inner wall of the cylinder 300, and a second flow channel 420 is formed between the first filter element 400 and the outer wall of the guide element 200. The first flow channel 410 is connected to one of the first inlet 120 and the first outlet 130, and the second flow channel 420 is connected to the other of the first inlet 120 and the first outlet 130.

[0068] It is understood that the first flow channel 410 and the second flow channel 420 are connected through the first filter element 400. The first flow channel 410 can be connected to the first inlet 120, in which case the second flow channel 420 is connected to the first outlet 130; or, the first flow channel 410 can be connected to the first outlet 130, in which case the second flow channel 420 is connected to the first inlet 120. The first flow channel 410 and the second flow channel 420 are located within the first chamber 101. The first chamber 101 is isolated from the guide channel 201, and the first chamber 101 is also isolated from the second chamber 102. The water in the first chamber 101 is isolated from the water in the second chamber 102 and the guide channel 201. In this way, the first filter element 400 and the second filter element 500 can achieve the same or different filtration effects, ensuring that the filter element assembly 10 can have different filtration modes. For example, domestic water can be filtered through the first filter element 400, and drinking water can be filtered through the second filter element 500.

[0069] Please see Figure 5 In one embodiment of this application, the water flow process within the receiving cavity 110 is as follows:

[0070] The first inlet 120 receives external tap water. After being filtered by the third filter element 600, the tap water flows into the first channel 410 and is further filtered by the first filter element 400 to obtain domestic water. The domestic water flows along the second channel 420 to the first outlet 130, and then flows out from the first outlet 130 (e.g., ...). Figure 5 (The direction indicated by the thin arrow) is provided for user use. The structure of the third filter element 600 will be described in detail later.

[0071] The second inlet 140 receives pure water filtered by the reverse osmosis filter. The pure water flows through the second filter element 500 in the second chamber 102 for filtration. The filtered water flows into the fourth filter element 700. After filtration by the fourth filter element 700, the pure water becomes drinking water. The drinking water flows along the guide channel 201 to the second outlet 150 and flows out (e.g., Figure 5 (The direction indicated by the thick arrow) is for the user to drink. The structure of the fourth filter element 700 will be described in detail later.

[0072] It should be noted that during the flow of water in the aforementioned receiving cavity 110, since the first chamber 101 and the guide channel 201 are isolated from each other, and the first chamber 101 and the second chamber 102 are separated, the filtration process of the water in the first chamber 101 and the filtration process of the water in the second chamber 102 will not affect each other. Users can choose the first filter element 400 or the second filter element 500 to filter the water according to their own needs. Users can also inject water into the first inlet 120 and the second inlet 140 at the same time so that the first filter element 400 and the second filter element 500 work at the same time.

[0073] Please see Figure 3 , Figure 4 , Figure 9 and Figure 10 In one embodiment, the filter element assembly 10 further includes a third filter element 600 disposed in the first chamber 101 for filtering water flowing into the first chamber 101. The first water inlet 120, the third filter element 600 and the first filter element 400 are arranged sequentially along the axial direction of the outer casing 100.

[0074] It is understandable that the third filter element 600 is located in the first chamber 101. The first inlet 120, the third filter element 600 and the first filter element 400 are arranged sequentially along the axial direction of the outer shell 100. That is, the water flowing into the first chamber 101 from the first inlet 120 is first filtered by the third filter element 600 and then flows through the first filter element 400 for filtration. This can improve the filtration effect of the filter element assembly 10.

[0075] Furthermore, the third filter element 600 may have a first channel 610, which may connect the first inlet 120 and the first flow channel 410, or the first channel 610 may connect the first inlet 120 and the second flow channel 420. In other words, the water filtered by the third filter element 600 may flow into the first flow channel 410 first or into the second flow channel 420 first. The specific flow channel 420 is not limited here. It is only necessary that the third filter element 600 and the first filter element 400 can filter the water flowing into the first chamber 101 in sequence.

[0076] The third filter element 600 is located at the water inlet end of the first filter element 400. This helps ensure that the first filter element 400 has sufficient thickness. When the first filter element 400 is made of rolled PP cotton or rolled together with carbon fiber, it needs a certain thickness to maintain a good filtration effect and meet the filtration requirements of the filter cartridge assembly 10. Of course, in other embodiments, the third filter element 600 can be made of silicon phosphate crystal.

[0077] In one embodiment, the third filter element 600 is sleeved outside the flow guide 200, and the third filter element 600 has a first channel 610, which connects the first water inlet 120 and the first flow channel 410.

[0078] It is understood that the third filter element 600 is arranged in a ring shape. The third filter element 600 is disposed inside the first chamber 101 and sleeved outside the guide member 200. The third filter element 600 fills the annular space between the guide member 200 and the cylinder 300. In this way, the water flowing into the first chamber 101 from the first inlet 120 will flow through the third filter element 600 for filtration before flowing into the first flow channel 410, thereby ensuring the filtration effect of the third filter element 600. In addition, the extension direction of the first channel 610 is not limited here. The extension direction of the first channel 610 includes, but is not limited to, extending along the axial direction of the outer shell 100. Of course, it can also form an angle with the axial direction of the outer shell 100. In this embodiment, the first channel 610 extends along the axial direction of the outer shell 100, which is beneficial for forming the first channel 610 on the third filter element 600, thereby simplifying the structure of the third filter element 600.

[0079] In one embodiment, the third filter element 600 includes a first filter housing 620 and a first filter unit. The first filter housing 620 has a first filter cavity 630 arranged in an annular shape, and a first water inlet 640 and a first water outlet 650 communicating with the first filter cavity 630. The first filter unit is disposed in the first filter cavity 630. The first water inlet 640, the first filter cavity 630 and the first water outlet 650 are sequentially connected to form the first channel 610.

[0080] Understandably, the first filter unit fills the annularly arranged first filter chamber 630, making the first filter unit also annular. Water entering the first chamber 101 flows into the first filter chamber 630 through the first inlet hole 640, is filtered by the first filter unit, and then flows out through the first outlet hole 650. Water flowing out of the third filter element 600 flows into the first flow channel 410, is filtered by the first filter element 400, and then flows through the second flow channel 420 to the first outlet 130 before being discharged. There can be multiple first inlet holes 640 and multiple first outlet holes 650, which can be distributed circumferentially on the first filter shell 620 to improve the water inlet and outlet speeds of the third filter element 600.

[0081] Please see Figure 9 and Figure 10In one embodiment, the first filter housing 620 includes a first upper cover 660 and a first lower cover 670 arranged in an annular configuration. The first upper cover 660 is detachably mounted on the first lower cover 670 to enclose and form a first filter cavity 630 arranged in an annular configuration. The top wall of the first upper cover 660 is provided with a plurality of first water inlet holes 640 extending radially therefrom and distributed circumferentially. The bottom wall of the first lower cover 670 is provided with a plurality of first water outlet holes 650 extending radially therefrom and distributed circumferentially.

[0082] It is understood that the first upper cover 660 can be detachably attached to the first lower cover 670 by means including, but not limited to, threaded connection or snap-fit ​​connection. Both the first upper cover 660 and the first lower cover 670 are annularly arranged, which makes it easy to form the annular first filter chamber 630 and facilitates the quick installation of the first filter unit.

[0083] Furthermore, the first water inlet 640, the first filter chamber 630, and the first water outlet 650 can be arranged sequentially along the axial direction of the outer casing 100. The first water inlet 640 is located above the first water outlet 650, so that the water in the first chamber 101 can flow from the first water inlet 640 through the first filter unit under the action of gravity and then flow out from the first water outlet 650, which helps to improve the smoothness of water flow through the first filter unit.

[0084] Furthermore, multiple first water inlets 640 are circumferentially distributed on the top wall of the first upper cover 660, and each first water inlet 640 extends radially along the first filter shell 620. This disperses the water flow into multiple streams when passing through the multiple first water inlets 640. After being filtered by the first filter unit at the corresponding position, the multiple streams of water flow out through the multiple first water outlets 650. The multiple first water outlets 650 are circumferentially distributed on the bottom wall of the first lower cover 670, and each first water outlet 650 extends radially along the first filter shell 620. That is, each first water inlet 640 can be correspondingly set with each first water outlet 650, thereby improving the water flow speed and smoothness when passing through the third filter element 600.

[0085] In one embodiment, the first filter unit can be made of granular activated carbon. Granular activated carbon can effectively filter chloroform in water, ensuring that the chloroform content of the filtered water fully complies with national standards. Preferably, the length of the granular activated carbon in the axial direction of the outer shell 100 is not less than 30 mm, thus ensuring that the removal rate of chloroform in the water by the third filter element 600 reaches more than 95% during the filtration process, meeting national standards.

[0086] Please see Figure 2 and Figure 4In one embodiment, the filter element assembly 10 further includes an upper end cover 820 disposed in the first chamber 101 and sleeved on the flow guide 200. The upper end cover 820 is disposed at one end of the first filter element 400 near the first water inlet 120. Part of the first filter element 400 is installed inside the upper end cover 820, and the third filter element 600 abuts and is supported by the upper end cover 820.

[0087] Understandably, the upper cover 820 is located inside the first chamber 101 and near the first inlet 120. The upper cover 820 mates with the outer shell 100, and the outer shell 100 and the upper cover 820 abut and seal. The side of the upper cover 820 facing away from the first inlet 120 has a ring-shaped mounting groove for installing the first filter element 400. The end of the first filter element 400 near the first inlet 120 is installed in the mounting groove to achieve quick positioning and installation of the first filter element 400, ensuring the stability of the first filter element 400 installed in the first chamber 101.

[0088] Furthermore, the third filter element 600 is fitted over the upper end cover 820, and the upper end cover 820 is provided with a support strip. The end of the third filter element 600 closest to the first filter element 400 abuts and is supported on the support strip, so that a liquid-passing gap is formed between the third filter element 600 and the upper end cover 820. This arrangement allows water filtered by the third filter element 600 to flow into the first flow channel 410 through the liquid-passing gap, ensuring the smooth flow of water through the third filter element 600 and the first filter element 400.

[0089] Please see Figure 3 and Figure 13 In one embodiment, the filter element assembly 10 further includes a fourth filter element 700 disposed in the second chamber 102. The fourth filter element 700 is located at the end of the cylinder 300 away from the second inlet 140 and is sleeved on the outside of the cylinder 300. The fourth filter element 700 has a second channel 710, which connects the second chamber 102 and the flow guide channel 201. The end of the fourth filter element 700 near the second inlet 140 is sealed to the outer peripheral wall of the cylinder 300 by a sealing member.

[0090] It is understandable that by setting a fourth filter element 700 outside the cylinder 300, water can enter the second chamber 102 and be filtered by the second filter element 500, and then enter the second channel 710 and be filtered by the fourth filter element 700. The filtered water then flows out from the guide channel 201, thus improving the filtration effect of the filter element assembly 10.

[0091] The second filter element 500 can be made of granular activated carbon. When the granular activated carbon has sufficient length along the axial direction of the outer shell 100, it can effectively filter chloroform in the water, ensuring that the chloroform content of the filtered water fully complies with national standards. Preferably, the length of the granular activated carbon along the axial direction of the outer shell 100 is not less than 30 mm, thus ensuring that the removal rate of chloroform in the water by the second filter element 500 reaches more than 95% during the filtration process, meeting national standards.

[0092] Furthermore, the fourth filter element 700 is a post-filter. For example, when the second filter element 500 is made of granular activated carbon, the fourth filter element 700 can be made of a microfiltration membrane, such as a folded multilayer microfiltration membrane; or, the fourth filter element 700 can be made of PP cotton that can intercept carbon powder, and the specifics are not limited here. The fourth filter element 700 is used to filter the carbon powder of residual granular activated carbon in the water to prevent the water flowing out of the filter element assembly 10 from having black carbon powder.

[0093] Furthermore, the end of the fourth filter element 700 near the second inlet 140 is sealed to the outer peripheral wall of the cylinder 300 via a sealing element. The sealing element can be installed on the fourth filter element 700 or on the outer wall of the cylinder 300; the specific installation is not limited here. The sealing element can be a sealing ring. The sealing ring ensures the sealing performance between the fourth filter element 700 and the cylinder 300, preventing gaps between them from affecting the filtration efficiency of the second filter element 500 and the fourth filter element 700, thus improving the reliability of the filter element assembly 10.

[0094] Please see Figure 3 , Figure 11 and Figure 12 In one embodiment, the outer wall of the cylinder 300 near the end of the fourth filter element 700 is provided with a first annular boss 310, and the first annular boss 310 is provided with a first annular groove 320 for holding the seal.

[0095] It is understandable that by providing a first annular protrusion 310 on the outer wall of the cylinder 300, not only is the structural strength of the cylinder 300 strengthened, but it is also easy to form a first annular groove 320 on the first annular protrusion 310, so as to simplify the way of holding and fixing the sealing element, thereby simplifying the internal structure of the filter element assembly 10.

[0096] Please see Figure 3 and Figure 13In one embodiment, the fourth filter element 700 includes a second filter housing 720 and a second filter unit 730. The second filter housing 720 has a second filter cavity arranged in an annular shape and a second water inlet 740 and a second water outlet 750 communicating with the second filter cavity. The second filter unit 730 is disposed in the second filter cavity. The second water inlet 740, the second filter cavity and the second water outlet 750 are sequentially connected to form the second channel 710.

[0097] It is understood that in this embodiment, the second filter unit 730 fills the second filter cavity in a ring-shaped arrangement, the second water inlet 740 is located on the outer wall of the second filter shell 720, and the second water outlet 750 is located on the inner wall of the second filter shell 720. This arrangement allows water to flow radially through the second filter unit 730 for filtration. The second filter shell 720 includes a second upper cover 760 and a second lower cover 770. The second upper cover 760 is detachably mounted on the second lower cover 770 to enclose the ring-shaped second filter cavity. Furthermore, the second filter shell 720 is ring-shaped, and there is a gap between the inner wall of the second filter shell 720 and the outer wall of the cylinder 300. This allows water filtered by the second filter unit 730 to flow into this gap from the second water outlet 750, and then into the guide channel 201.

[0098] In one embodiment, the end of the guide member 200 away from the second water inlet 140 cooperates with the outer shell 100 to form a liquid passage connecting the second channel 710 and the first flow channel 410. The liquid passage is provided with a valve body 810 that unidirectionally flows from the second channel 710 to the first flow channel 410.

[0099] It is understood that the first filter element 400 can be a pre-filter element. A first flow channel 410 is formed between the first filter element 400 and the inner wall of the cylinder 300, and a second flow channel 420 is formed between the first filter element 400 and the outer wall of the guide element 200. When water flows into the first flow channel 410 from the first inlet 120, the water is filtered by the first filter element 400 and flows into the second flow channel 420 before flowing out from the first outlet 130.

[0100] Furthermore, the liquid passage connects the second channel 710 and the first flow channel 410. When the valve body 810 in the liquid passage is unidirectionally open, the water in the second channel 710 can flow to the first flow channel 410 after passing through the valve body 810. That is, when the valve body 810 is open, the second inlet 140 continuously supplies water to the second chamber 102, so that the water can pass through the second filter element 500 and the fourth filter element 700 in sequence. The filtered water can flow into the first flow channel 410 under the action of the liquid passage and the valve body 810, that is, into the inlet end of the first filter element 400, and flow out from the first outlet 130 after being filtered by the first filter element 400. In other words, this solution, by setting up a liquid passage and a one-way valve body 810, allows water flowing into the second chamber 102 to be filtered sequentially by the second filter element 500, the fourth filter element 700, and the first filter element 400. This not only improves the filtration effect but also allows the pure water filtered by the fourth filter element 700 to flush the inlet end of the first filter element 400. That is, the raw water on the raw water side of the first filter element 400 is replaced with pure water filtered by the fourth filter element 700, reducing the TDS concentration on the raw water side when the first filter element 400 is in use. This avoids the problem of increased TDS in the first cup of water output after the first filter element 400 of the filter element assembly 10 has been unused for a long time, thus reducing the TDS concentration of the first cup of water.

[0101] Please see Figure 6 The process of water flow during unidirectional flow of valve body 810 is explained in detail below. When water flows into the second chamber 102 from the second inlet 140, it is filtered by the second filter element 500. The filtered water then flows into the second channel 710 and is filtered by the fourth filter element 700. The filtered water then flows into the liquid passage and, after passing through valve body 810, flows into the first flow channel 410. The pure water in the first flow channel 410 is filtered by the first filter element 400 and flows into the second flow channel 420, and then flows out through the first outlet 130. This allows the pure water filtered by the fourth filter element 700 to flow into the first chamber 101 to flush the raw water side of the first filter element 400, thereby improving the filtration effect of the first filter element 400 and reducing the TDS concentration of the first cup of water at the first outlet 130.

[0102] Please see Figure 3 , Figure 5 and Figure 6 In one embodiment, the liquid passage includes a third channel 103 and a fourth channel 202. The third channel 103 is disposed on the bottom wall of the receiving cavity 110 away from the first inlet 120, and the fourth channel 202 is disposed on the guide member 200. The second channel 710, the third channel 103, the fourth channel 202 and the first flow channel 410 are connected in sequence, and the valve body 810 is disposed in the fourth channel 202.

[0103] Understandably, the third channel 103 is located on the bottom wall of the receiving cavity 110, making it easy to process and shape. The fourth channel 202 is located on the guide member 200, which not only makes it easy to process and shape but also facilitates communication with the third channel 103, thus simplifying the internal structure of the filter element assembly 10. The third channel 103 connects the second channel 710 of the fourth filter element 700 and the fourth channel 202 on the guide member 200. When the valve body 810 is unidirectionally open, the water flow can smoothly flow through the second filter element 500 and the fourth filter element 700 in sequence before flowing into the first flow channel 410 to flush the inlet end of the first filter element 400. In addition, the valve body 810 is located in the fourth channel 202 of the guide member 200. During assembly, the valve body 810 can be installed first, and then the guide member 200 can be installed in the receiving cavity 110, improving the convenience of installing the valve body 810 and the guide member 200.

[0104] Please see Figures 5 to 8 In one embodiment, the third channel 103 includes a plurality of liquid-passing grooves 104 disposed on the bottom wall of the receiving cavity 110, and the fourth channel 202 includes a second sub-guide channel 221 and a third sub-guide channel 222 that are sequentially connected to the liquid-passing grooves 104. The valve body 810 is disposed in the third sub-guide channel 222. When the water pressure in the second sub-guide channel 221 is greater than the water pressure in the first flow channel 410, the valve body 810 unidirectionally guides the water path from the second sub-guide channel 221 to the first flow channel 410.

[0105] Understandably, multiple liquid-passing grooves 104 can extend radially along the cylinder 300 and be circumferentially distributed on the bottom wall of the receiving cavity 110. The second sub-guide channel 221 and the third sub-guide channel 222 are located at the end of the guide member 200 away from the first outlet 130 to connect the multiple liquid-passing grooves 104 and the first flow channel 410. The second sub-guide channel 221 and the third sub-guide channel 222 will be described in detail later and will not be repeated here. The valve body 810 abuts and seals against the inner wall of the third sub-guide channel 222 to ensure the stability of the unidirectional flow of the valve body 810.

[0106] Figure 5 This is a schematic diagram of water flow when valve body 810 is not open. Figure 6This is a schematic diagram showing water flow when valve body 810 is open. The water purification device includes a first faucet and a second faucet. Filter assembly 10 is used in the water purification device. The first outlet 130 is connected to the first faucet, and the second outlet 150 is connected to the second faucet. When the second faucet is opened, the second outlet 150 opens, and water in the second chamber 102 flows through the guide channel 201 to the second outlet 150 for discharge. The water pressure in the second sub-guide channel 221 is lower than the water pressure in the first flow channel 410. At this time, valve body 810 closes, and water flowing into the second chamber 102 is filtered by the second filter element 500 and the fourth filter element 700 and then flows out along the guide channel 201 to the second outlet 150, that is, out of the second faucet (e.g., as shown in the diagram). Figure 5 (Direction indicated by the medium-thick arrow).

[0107] When the second tap is closed, the second outlet 150 closes, and the water pressure in the guide channel 201 rises, that is, the water pressure in the second sub-guide channel 221 rises until the water pressure in the second sub-guide channel 221 is greater than the water pressure in the first flow channel 410. At this time, the unidirectional valve body 810 opens, and the water flowing into the second chamber 102 flows sequentially through the second filter element 500, the second channel 710, the liquid trough 104, the second sub-guide channel 221, the third sub-guide channel 222, and the valve body 810 before flowing into the first flow channel 410, so as to achieve rinsing of the inlet end of the first filter element 400 (e.g., Figure 6 (Direction indicated by the medium-thick arrow).

[0108] Please see Figure 3 , Figure 4 , Figure 11 and Figure 12 In one embodiment, the filter element assembly 10 further includes an interceptor 830 disposed in the second chamber 102 and used to block the second filter element 500. The interceptor 830 is annular and disposed between the second filter element 500 and the second inlet 140. A second annular boss 330 is provided on the outer wall of the cylinder 300 near the second inlet 140. The interceptor 830 is sleeved on the cylinder 300 and abuts against and is supported on the second annular boss 330.

[0109] Understandably, when the second filter element 500 is made of granular activated carbon and fills the second chamber 102, the lower end of the second chamber 102 is blocked by the fourth filter element 700, thereby limiting the granular activated carbon. The upper end of the second chamber 102 also needs to limit the granular activated carbon. Therefore, in this embodiment, the interceptor 830 is annular and disposed between the second filter element 500 and the second inlet 140 to block the granular activated carbon in the second filter element 500 and prevent it from entering the second inlet 140. The cylinder 300 is provided with a second annular protrusion 330 arranged in a ring shape. The interceptor 830 abuts and is supported on the second annular protrusion 330 of the cylinder 300. The inner wall of the interceptor 830 abuts against the outer wall of the cylinder 300, and the outer wall of the interceptor 830 abuts against the inner wall of the outer shell 100. The interceptor 830 has multiple openings that extend along the axial direction of the housing 100 and are circumferentially distributed around the axis. Furthermore, the openings of the interceptor 830 may be fitted with filter screens to prevent smaller particles of activated carbon from passing through.

[0110] Please see Figure 3 , Figure 7 and Figure 8 In one embodiment, the flow guide 200 includes a flow guide section 210 and a liquid passage section 220. The flow guide section 210 has a first sub-flow guide channel 211 communicating with the second outlet 150. The liquid passage section 220 is located at one end of the flow guide section 210 away from the second outlet 150. The liquid passage section 220 has a second sub-flow guide channel 221 communicating with the second chamber 102 and the first sub-flow guide channel 211. A third sub-flow guide channel 222 communicating with the second sub-flow guide channel 221 is provided on the outer wall of the liquid passage section 220. The third sub-flow guide channel 222 is used for installing the valve body 810. The flow guide section 210 and the liquid passage section 220 are integrally formed.

[0111] It is understood that the outer diameter of the guide pipe section 210 is smaller than the outer diameter of the liquid passage section 220. The guide pipe section 210 is disposed on the liquid passage section 220 and located between the second outlet 150 and the liquid passage section 220. The guide pipe section 210 and the liquid passage section 220 are integrally formed to form the guide channel 201. The guide pipe section 210 and the liquid passage section 220 can be integrally injection molded, integrally stamped, or otherwise formed so that the guide component 200 is a single part. The structure of the single part guide component 200 is stable, and correspondingly, the structure of the guide channel 201 formed by the guide component 200 is also stable. The first sub-guide channel 211 is part of the guide channel 201, and the second sub-guide channel 221 is also part of the guide channel 201. When the guide member 200 is not equipped with a valve body 810, the guide channel 201 includes the first sub-guide channel 211 and the second sub-guide channel 221. At this time, the guide channel 201 is used to guide the liquid in the second chamber 102 to the second outlet 150. When the guide member 200 is equipped with a valve body 810, the guide channel 201 includes the first sub-guide channel 211 and the second sub-guide channel 221. The flow channel 201, second sub-flow channel 221, and third sub-flow channel 222 are configured such that, when the valve body 810 is closed, the flow channel 201 guides the liquid in the second chamber 102 to the second outlet 150; when the valve body 810 is open, the flow channel 201 guides the liquid in the second chamber 102 to the space between the first filter element 400 and the inner wall of the cylinder 300, i.e., at this time, the flow channel 201 guides the liquid in the second chamber 102 to the first flow channel 410. Therefore, directly forming the flow channel 201 through the flow guide element 200 simplifies the internal structure of the filter element assembly 10 and reduces the assembly difficulty and manufacturing cost of the filter element assembly 10.

[0112] In one embodiment, the edge of the liquid-passing pipe section 220 near the end of the guide pipe section 210 is provided with an extension 230. The extension 230 extends toward the guide pipe section 210 and surrounds the liquid-passing pipe section 220 and the guide pipe section 210 to form an annular mounting groove 240 for mounting the first filter element 400. The length of the extension 230 along the axial direction of the guide member 200 is less than the length of the guide pipe section 210. It can be understood that the first filter element 400 is sleeved on the outside of the guide pipe section 210 of the guide member 200, and the end of the first filter element 400 away from the first inlet 120 is installed in the annular mounting groove 240 to achieve quick positioning and installation of the first filter element 400 and ensure the stability of the first filter element 400 installed in the first chamber 101.

[0113] In one embodiment, the first filter element 400 can be made of PP cotton, which can be rolled up and has a hollow internal structure. In other embodiments, the first filter element 400 can also be made of PP cotton and carbon fiber rolled together. The specific method is not limited here, as long as it meets the requirement of being a pre-filter element.

[0114] In one embodiment, the inner diameter of the liquid-passing pipe section 220 is larger than the outer diameter of the flow-guiding pipe section 210. This arrangement results in a smaller outer diameter of the flow-guiding pipe section 210, which occupies less space within the cylinder 300. This helps to increase the space of the first chamber 101, thereby increasing the filling capacity of the first filter element 400. In other words, it can improve the occupancy rate of the first filter element 400 within the cylinder 300, thus improving the filtration effect of the filter element assembly 10.

[0115] Please see Figure 8 In one embodiment, the maximum inner diameter of the guide pipe section 210 is D1, where D1 satisfies: 8mm ≤ D1 ≤ 16mm. This setting, by limiting the maximum inner diameter of the guide pipe section 210, limits its width, volume, and the space it occupies within the cylinder 300. This ensures that the guide pipe section 210 occupies minimal space while allowing for smooth water flow. The smaller volume of the guide pipe section 210 facilitates increased occupancy of the filter media within the filter element assembly 10, thereby improving the filtration effect of the filter element assembly 10. The value of D1 can be 8mm, 10mm, 12mm, 14mm, or 16mm, etc., and is not specifically limited here.

[0116] Please see Figures 1 to 3In one embodiment, the outer casing 100 includes a casing body 160 and a casing cover 170. The casing cover 170 is detachably mounted on the casing body 160. One end of the casing cover 170 has an opening, at which a filter element interface 180 is provided. The filter element interface 180 is provided with a first inlet 120, a first outlet 130, a second inlet 140, and a second outlet 150 communicating with the receiving cavity 110. The first inlet 120 and the first outlet 130 communicate with the first chamber 101. The second inlet 140, the second chamber 102, the flow guide channel 201, and the second outlet 150 are sequentially connected. Furthermore, a first filter element 400 is disposed in the first chamber 101, and a second filter element 500 is disposed in the second chamber 102. This configuration ensures that the first inlet 120, the first outlet 130, the second inlet 140, and the second outlet 150 are located at the same end of the outer casing 100. When water flows into the first chamber 101 from the first inlet 120 and is filtered by the first filter element 400, the filtered water can flow out from the first outlet 130. When water flows into the second chamber 102 from the second inlet 140 and is filtered by the second filter element 500, it can flow into the guide channel 201 and then flow out from the second outlet 150. The first chamber 101 and the guide channel 201 are isolated from each other, and the first chamber 101 and the second chamber 102 are independent of each other, and their internal filtration processes do not affect each other, thus ensuring the reliability of the filter element assembly 10.

[0117] Please see Figure 3 and Figure 14 , Figure 14 The filter element assembly and Figure 3 Compared to the filter components in the middle, Figure 14 The filter cartridge assembly in the middle does not have a third filter element.

[0118] Please see Figure 3 and Figure 15 , Figure 15 The filter element assembly and Figure 3 Compared to the filter components in the middle, Figure 15 The filter element assembly in the middle does not have a one-way valve.

[0119] Please see Figure 3 and Figure 16 , Figure 16 The filter element assembly and Figure 3 Compared to the filter components in the middle, Figure 16 The filter element assembly in this application does not have a third filter element or a one-way valve. Therefore, the internal structure of the filter element assembly can be configured in various ways, and can be customized as needed.

[0120] The present invention also proposes a water purification device, which includes a body and a filter element assembly 10. The filter element assembly 10 is disposed in the body. The specific structure of the filter element assembly 10 is as described in the above embodiments. Since the present water purification device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0121] The present invention also proposes a flow guide 200, which is applied to the filter element assembly 10 as described above. The specific structure of the filter element assembly 10 is as described in the above embodiments. Since the flow guide 200 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0122] Please see Figure 7 and Figure 8 In one embodiment of the flow guide 200 of the present invention, the flow guide 200 is applied to the filter element assembly 10 (e.g., Figures 1 to 3 As shown in the diagram, the filter element assembly 10 has a second chamber 102 and a second outlet 150. The flow guide 200 includes a flow guide section 210 and a liquid passage section 220. The flow guide section 210 has a first sub-flow guide channel 211. The liquid passage section 220 is located at one end of the flow guide section 210 and has a second sub-flow guide channel 221 communicating with the first sub-flow guide channel 211. The outer wall of the liquid passage section 220 is provided with a... The second sub-guide channel 221 is connected to the third sub-guide channel 222, which is used for the installation of the valve body 810. The guide pipe section 210 is integrally formed with the liquid passage section 220. The inner diameter of the liquid passage section 220 is larger than the outer diameter of the guide pipe section 210. The first sub-guide channel 211 and the second sub-guide channel 221 are connected to guide the liquid in the second chamber 102 to the second outlet 150.

[0123] It is understandable that the outer diameter of the guide pipe section 210 is smaller than the outer diameter of the liquid-passing pipe section 220. This design results in a smaller outer diameter of the guide pipe section 210, which helps to reduce the volume of the guide component 200. This means the guide pipe section 210 occupies less space within the cylinder 300, increasing the space of the first chamber 101 and the filling capacity of the first filter element 400. This improves the occupancy rate of the first filter element 400 within the cylinder 300, thereby enhancing the filtration effect of the filter element assembly 10. The guide pipe section 210 is located on the liquid-passing pipe section 220 and between the second outlet 150 and the liquid-passing pipe section 220. The guide pipe section 210 and the liquid-passing pipe section 220 are integrally formed. They can be integrally injection molded, integrally stamped, or formed in other ways to ensure that the guide component 200 is a single part, and the structure of the single-part guide component 200 is stable.

[0124] The first sub-channel 211 and the second sub-channel 221 are connected to guide the liquid in the second chamber 102 to the second outlet 150. The water flows directly through the guide member 200 of a single component, which helps to simplify the structure of the guide member 200 and the internal structure of the filter element assembly 10, thereby reducing the assembly difficulty and manufacturing cost of the filter element assembly 10.

[0125] Please see Figure 8 In one embodiment, the edge of the liquid-passing pipe section 220 near the end of the guide pipe section 210 is provided with an extension 230. The extension 230 extends toward the guide pipe section 210 and surrounds the liquid-passing pipe section 220 and the guide pipe section 210 to form an annular mounting groove 240. The length of the extension 230 along the axial direction of the guide member 200 is less than the length of the guide pipe section 210. It can be understood that the annular mounting groove 240 is used for the installation of the first filter element 400. The first filter element 400 is sleeved on the outside of the guide pipe section 210 of the guide member 200, and the end of the first filter element 400 away from the second outlet 150 is installed in the annular mounting groove 240 to achieve quick positioning and installation of the first filter element 400 and ensure the stability of the installation of the first filter element 400.

[0126] In one embodiment, the outer peripheral wall of the liquid-passing pipe section 220 is provided with a second annular groove 223 for holding the seal. The second annular groove 223, the third sub-guide channel 222, and the first sub-guide channel 211 are arranged sequentially along the axial direction of the guide member 200. It can be understood that by providing the second annular groove 223, the seal can be quickly installed and positioned, ensuring the stability of the seal between the end of the liquid-passing pipe section 220 away from the second outlet 150 and the cylinder 300.

[0127] Furthermore, the third sub-guide channel 222 can be arranged to extend radially along the guide member 200 to facilitate the installation of the valve body 810 and the smooth flow of water. The second annular groove 223 is located on the side of the third sub-guide channel 222 away from the second outlet 150, so that when the seal is installed in the second annular groove 223, the water in the third sub-guide channel 222 will not leak into the first chamber 101, thus ensuring the stability of the filter element assembly 10.

[0128] In one embodiment, the depth of the third sub-channel 222 is greater than the thickness of the wall of the liquid-passing pipe section 220. This arrangement provides sufficient space in the third sub-channel 222 to allow the valve body 810 to be stably installed within it.

[0129] In one embodiment, the maximum inner diameter of the guide pipe section 210 is D1, where D1 satisfies: 8mm ≤ D1 ≤ 16mm. This setting, by limiting the maximum inner diameter of the guide pipe section 210, limits its width, volume, and the space it occupies within the cylinder 300. This ensures that the guide pipe section 210 occupies minimal space while allowing for smooth water flow. The smaller volume of the guide pipe section 210 facilitates increased occupancy of the filter media within the filter element assembly 10, thereby improving the filtration effect of the filter element assembly 10. The value of D1 can be 8mm, 10mm, 12mm, 14mm, or 16mm, etc., and is not specifically limited here.

[0130] 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 filter element assembly, characterized in that, include: The outer shell has a receiving cavity, and one end of the outer shell is provided with a mounting part, the mounting part having a first water inlet, a first water outlet, a second water inlet and a second water outlet communicating with the receiving cavity; A flow guide is disposed within the receiving cavity, and the flow guide is an integral structure with a flow channel formed inside; A cylindrical body is disposed within the receiving cavity and sleeved outside the flow guide. A first chamber is formed between the inner wall of the cylindrical body and the outer wall of the flow guide. The first chamber is isolated from the flow guide channel. A second chamber is formed between the outer wall of the cylindrical body and the inner wall of the outer shell. The second chamber is connected to the flow guide channel. The first water inlet and the first water outlet are connected to the first chamber. The second water inlet is connected to the second chamber. The second water outlet is connected to the flow guide channel. A first filter element is disposed in the first chamber and sleeved outside the flow guide element, and a first flow channel is formed between the first filter element and the inner wall of the cylinder; as well as The second filter element is disposed in the second chamber and sleeved on the outside of the cylinder; A fourth filter element is disposed within the second chamber and sleeved on the outer shell of the cylinder. The fourth filter element is located at the end of the cylinder away from the second water inlet and has a second channel. The second channel connects the second chamber and the guide channel. The guide element cooperates with the outer shell to form a liquid passage connecting the second channel and the first flow channel. The liquid passage is provided with a valve body that unidirectionally flows from the second channel to the first flow channel. When the valve body is unidirectionally open, the water in the second chamber can flow through the second filter element and the fourth filter element in sequence to form pure water before flowing into the first flow channel, so as to flush the water inlet end of the first filter element.

2. The filter element assembly as described in claim 1, characterized in that, A second flow channel is formed between the first filter element and the outer wall of the flow guide element. The first flow channel is connected to one of the first inlet and the first outlet, and the second flow channel is connected to the other of the first inlet and the first outlet.

3. The filter element assembly as described in claim 2, characterized in that, The filter element assembly further includes a third filter element disposed in the first chamber for filtering water flowing into the first chamber. The first water inlet, the third filter element, and the first filter element are arranged sequentially along the axial direction of the outer shell.

4. The filter element assembly as described in claim 3, characterized in that, The third filter element is sleeved outside the flow guide element, and the third filter element has a first channel, which connects the first water inlet and the first flow channel.

5. The filter element assembly as described in claim 4, characterized in that, The third filter element includes a first filter shell and a first filter unit. The first filter shell has a first filter cavity arranged in a ring shape and a first water inlet and a first water outlet communicating with the first filter cavity. The first filter unit is disposed in the first filter cavity. The first water inlet, the first filter cavity and the first water outlet are sequentially connected to form the first channel.

6. The filter element assembly as described in claim 5, characterized in that, The first filter housing includes a first upper cover and a first lower cover arranged in an annular shape. The first upper cover is detachably placed on the first lower cover to enclose and form the first filter cavity arranged in an annular shape. The top wall of the first upper cover is provided with a plurality of first water inlet holes that extend radially and are distributed circumferentially thereon. The bottom wall of the first lower cover is provided with a plurality of first water outlet holes that extend radially and are distributed circumferentially thereon.

7. The filter element assembly as claimed in claim 1, characterized in that, The end of the fourth filter element near the second water inlet is sealed to the outer peripheral wall of the cylinder through a sealing element.

8. The filter element assembly as described in claim 7, characterized in that, The outer wall of the cylinder near the fourth filter element is provided with a first annular protrusion, and the first annular protrusion is provided with a first annular groove for holding the seal.

9. The filter element assembly as claimed in claim 1, characterized in that, The end of the guide member away from the second water inlet cooperates with the outer shell to form the liquid passage.

10. The filter element assembly as claimed in claim 1, characterized in that, The liquid passage includes a third channel and a fourth channel. The third channel is located on the bottom wall of the receiving cavity away from the first water inlet, and the fourth channel is located on the flow guide. The second channel, the third channel, the fourth channel and the first flow channel are connected in sequence, and the valve body is located in the fourth channel.

11. The filter element assembly as claimed in claim 10, characterized in that, The third channel includes multiple liquid passages on the bottom wall of the receiving cavity. The fourth channel includes a second sub-guide channel and a third sub-guide channel that are sequentially connected to the liquid passages. The valve body is located in the third sub-guide channel. When the water pressure in the second sub-guide channel is greater than the water pressure in the first flow channel, the valve body unilaterally guides the water path from the second sub-guide channel to the first flow channel.

12. The filter element assembly as claimed in any one of claims 1 to 11, characterized in that, The flow guide includes: The guide pipe section has a first sub-guide channel communicating with the second outlet; and A liquid-passing pipe section is located at one end of the guide pipe section away from the second outlet. The liquid-passing pipe section has a second sub-guide channel that connects the second chamber and the first sub-guide channel. A third sub-guide channel that connects to the second sub-guide channel is provided on the outer wall of the liquid-passing pipe section. The third sub-guide channel is used for valve body installation. The guide pipe section and the liquid-passing pipe section are integrally formed.

13. The filter element assembly as claimed in claim 12, characterized in that, The liquid-passing pipe section has an extension at one end near the flow guide pipe section. The extension extends toward one side of the flow guide pipe section and surrounds the liquid-passing pipe section and the flow guide pipe section to form an annular mounting groove for installing the first filter element. The length of the extension along the axial direction of the flow guide element is less than the length of the flow guide pipe section.

14. The filter element assembly as claimed in claim 12, characterized in that, The inner diameter of the liquid passage section is larger than the outer diameter of the flow guide section; And / or, the maximum inner diameter of the guide pipe section is D1, wherein D1 satisfies: 8mm≤D1≤16mm.

15. A water purification device, characterized in that, It includes a body and a filter element assembly as described in any one of claims 1 to 14, wherein the filter element assembly is disposed within the body.

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