A filter cartridge device

Abstract

This invention discloses a filter cartridge device, comprising a first filter cartridge, a second filter cartridge, and a third filter cartridge. The first filter cartridge has a first water flow channel, a second inlet water flow channel, and a second outlet water flow channel, with a first filter material disposed along the water flow path of the first water flow channel. The second filter cartridge has a third water flow channel and a fourth water flow channel, with a second filter material disposed along the water flow path between the third and fourth water flow channels. The third filter cartridge is detachably disposed within the fourth water flow channel. The first and second filter cartridges are detachably connected, and the third water flow channel is connected to the second inlet water flow channel. The outlet end of the third filter cartridge is detachably connected to the first filter cartridge and is connected to the second outlet water flow channel. This solution enables individual replacement of filter cartridges of different levels, reducing filter cartridge replacement costs.

Description

Technical Field

[0001] This invention relates to the field of filter technology, and more particularly to a filter cartridge device and a water purification equipment. Background Technology

[0002] A composite filter cartridge device exists, containing two or more filter cartridges inside the filter bottle. Each filter cartridge is separated by a separator with water passages to form an internal water channel. Because different filter cartridges have different lifespans, the shorter-lifespan cartridge is typically matched with the other cartridges. When a shorter-lifespan cartridge expires or a cartridge in a particular stage becomes clogged, the entire composite filter cartridge device must be discarded, resulting in resource waste and increased replacement costs.

[0003] The information disclosed in this background section is only intended to enhance the understanding of the background technology of this application, and therefore may include prior art that is not known to those skilled in the art. Summary of the Invention

[0004] In response to the problems mentioned in the background art, the present invention proposes a filter cartridge device and a water purification equipment, in which different levels of filter cartridges can be replaced individually, reducing the cost of cartridge replacement.

[0005] To achieve the above-mentioned objectives, the present invention employs the following technical solution: In some embodiments of this application, a filter element device is provided, comprising: The first filter element is provided with a first water flow channel, a second water inlet channel, and a second water outlet channel, and a first filter material is provided in the water flow path of the first water flow channel; The second filter element is provided with a third water flow channel and a fourth water flow channel, and a second filter material is provided in the water flow path between the third water flow channel and the fourth water flow channel; The third filter element is detachably installed in the fourth water flow channel; The first filter element is detachably connected to the second filter element, and the third water channel is connected to the second water inlet channel; the third filter element is detachably connected to the first filter element and is connected to the second water outlet channel.

[0006] In some embodiments of this application, the first filter element includes a first bottle body, a first end cap and a second end cap are disposed inside the first bottle body, and the first end cap and the second end cap are arranged at an axial distance along the first bottle body; a first tube, a second tube and a third tube are disposed inside the first bottle body, a second water inlet channel is formed between the first tube and the second tube, a third water outlet channel is formed between the second tube and the third tube, and the third tube forms the second water outlet channel; the first filter material is disposed between the first end cap and the second end cap.

[0007] In some embodiments of this application, the second filter element includes a second bottle body, and a third end cap is disposed inside the second bottle body. The third end cap limits the second filter material within the second bottle body. A first end of the second bottle body is provided with an opening for the third end cap to protrude, and the third end cap is detachably connected to the first end of the first bottle body.

[0008] In some embodiments of this application, the third end cap is provided with an opening for the third filter element to be exposed, the first end of the first bottle body is provided with an opening for the third tube to be exposed, and the water outlet end of the third filter element is detachably connected to the third tube.

[0009] In some embodiments of this application, the first end of the second tube is connected to the first end of the first bottle body, a third water inlet is provided on the first end of the first bottle body, a fourth water inlet is provided on the third end cap, and the water outlet of the third water channel, the fourth water inlet, the third water inlet and the third water outlet channel are connected in sequence.

[0010] In some embodiments of this application, the first end of the first tube is connected to the first end cap, the first end cap is provided with a first water inlet, the first end of the first bottle is provided with a second water inlet, and the second water inlet channel, the first water inlet, the second water inlet and the water inlet end of the third water inlet channel are connected in sequence.

[0011] In some embodiments of this application, a fourth tube is further provided inside the first bottle body, the fourth tube dividing the first water channel into multiple sub-spaces, each of the sub-spaces being provided with the first filter material, and the water channels in the multiple sub-spaces being connected in parallel.

[0012] In some embodiments of this application, the end of the first filter element is provided with a first inlet, a first outlet, a second inlet, and a second outlet. The first inlet is connected to the inlet end of the first water channel, the first outlet is connected to the outlet end of the first water channel, the second inlet is connected to the second inlet channel, and the second outlet is connected to the second outlet channel. Raw water flows sequentially through the first inlet and the first water channel, and after being filtered by the first filter material, it becomes primary filtered water, which flows out from the first outlet. The primary filtered water flows sequentially through the second inlet, the second inlet channel, and the third water channel, and after being filtered by the second filter material, it becomes secondary filtered water. The secondary filtered water flows sequentially through the fourth water channel and the third filter element to obtain tertiary filtered water, which is discharged sequentially through the second outlet channel and the second outlet.

[0013] In some embodiments of this application, the end of the first filter element is provided with a first inlet, a first outlet, a second inlet, and a second outlet. The first inlet is connected to the inlet end of the first water channel, the first outlet is connected to the outlet end of the first water channel, the second inlet is connected to the second inlet channel, and the second outlet is connected to the second outlet channel. Raw water flows sequentially through the second inlet, the second inlet channel, and the third water channel, and is filtered by the second filter material to obtain primary filtered water. The primary filtered water flows sequentially through the fourth water channel and the third filter element to obtain secondary filtered water, and is discharged sequentially through the second outlet channel and the second outlet. The secondary filtered water flows sequentially through the first inlet and the first water channel, and is filtered by the first filter material to obtain tertiary filtered water, which flows out from the first outlet.

[0014] In some embodiments of this application, raw water flows into the third water channel through the second inlet channel and is filtered by the second filter material to obtain primary filtered water; the primary filtered water flows into the fourth water channel and is filtered by the third filter element to obtain secondary filtered water; the secondary filtered water flows into the first water channel and is filtered by the first filter element to obtain tertiary filtered water.

[0015] In some embodiments of this application, a water purification device is provided, including the filter cartridge device as described above.

[0016] Compared with the prior art, the advantages and positive effects of the present invention are: The filter cartridge device disclosed in this application includes a first filter cartridge, a second filter cartridge, and a third filter cartridge. The first filter cartridge is provided with a first water flow channel, a second water inlet channel, and a second water outlet channel. A first filter material is disposed in the water flow path of the first water flow channel. The second filter cartridge is provided with a third water flow channel and a fourth water flow channel. A second filter material is disposed in the water flow path between the third and fourth water flow channels. The third filter cartridge is detachably disposed in the fourth water flow channel. The first filter cartridge and the second filter cartridge are detachably connected. The third water flow channel is connected to the second water inlet channel. The third filter cartridge is detachably connected to the first filter cartridge and is also connected to the second water outlet channel. By placing the third filter cartridge inside the second filter cartridge, and by detachably connecting the first and second filter cartridges, and by detachably connecting the first and third filter cartridges, each filter cartridge can be replaced individually when its lifespan expires or it becomes clogged, reducing filter cartridge replacement costs.

[0017] Other features and advantages of the present invention will become clearer after reading the detailed embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0018] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a structural diagram of a filter cartridge device according to some embodiments; Figure 2 This is yet another structural diagram of a filter cartridge device according to some embodiments; Figure 3 This is an exploded view of a filter cartridge device according to some embodiments; Figure 4 This is a cross-sectional view of a filter cartridge device according to some embodiments; Figure 5 A water flow path diagram for a filter cartridge device according to some embodiments; Figure 6 This is yet another water flow path diagram for a filter cartridge device according to some embodiments; Figure 7 This is a structural diagram of a first filter element according to some embodiments; Figure 8 A cross-sectional view of a first filter element according to some embodiments; Figure 9 This is a structural diagram of a first bottle body according to some embodiments; Figure 10 for Figure 9 Enlarged view of section A in the middle; Figure 11 This is yet another structural diagram of the first bottle body according to some embodiments; Figure 12 A cross-sectional view of a first bottle body according to some embodiments; Figure 13 This is a structural diagram of a first end cap according to some embodiments; Figure 14 This is a structural diagram of a second end cap according to some embodiments; Figure 15 This is a structural diagram of a second filter bottle according to some embodiments; Figure 16 A cross-sectional view of a second filter bottle according to some embodiments; Figure 17 This is a structural diagram of a third filter element according to some embodiments; Figure 18 This is a structural diagram of a second bottle body according to some embodiments; Figure 19for Figure 18 Enlarged view of section B in the middle; Figure 20 This is yet another structural diagram of the second bottle body according to some embodiments; Figure 21 A cross-sectional view of a second bottle body according to some embodiments; Figure 22 This is a structural diagram of a third end cap according to some embodiments. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this invention, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0026] In some embodiments of this application, a water purification device, such as a water purifier, is provided. The water purification device includes a filter element device to filter raw water and provide purified water to the user.

[0027] Figure 1 This is an axonal structural diagram of a filter element device. Figure 2 This is a structural diagram of a filter cartridge device viewed from the end. Figure 3 This is a schematic diagram of the disassembly of a filter cartridge assembly. Figure 4 This is a cross-sectional view of a filter cartridge device.

[0028] The filter cartridge device includes a first filter cartridge 10. In some embodiments, the first filter cartridge 10 is also referred to as a first filter bottle 01. Figure 7 This is a structural diagram of the first filter element 10. Figure 8 This is a cross-sectional view of the first filter element 10.

[0029] The first filter element 10 includes a first bottle 100, and a first filter material 11 is disposed inside the first bottle 100. The first bottle 100 is also provided with a first water flow channel 610, a second water inlet channel 620, and a second water outlet channel 650. The first filter material 11 is disposed in the water flow path of the first water flow channel 610.

[0030] The filter element device also includes a second filter element 20 and a third filter element 30. The third filter element 30 is disposed inside the second filter element 20. Figure 15This is a structural diagram of the assembled second filter element 20 and third filter element 30. Figure 16 This is a cross-sectional view of the second filter element 20 and the third filter element 30 after assembly. Figure 17 This is a structural diagram of the third filter element 30. In some embodiments, the structure after assembling the second filter element 20 and the third filter element 30 is referred to as the second filter bottle 02.

[0031] The second filter bottle 02 includes a second bottle body 200. The second filter element 20 includes a second filter material 21. The third filter element 30 includes a third filter material 31. Both the second filter material 21 and the third filter material 31 are disposed within the second bottle body 200.

[0032] The second filter element 20 also includes a third water flow channel 630 and a fourth water flow channel 640. A second filter material 21 is provided in the water flow path between the third water flow channel 630 and the fourth water flow channel 640. The third filter element 30 is detachably installed in the fourth water flow channel 640.

[0033] The first filter element 10 and the second filter element 20 are detachably connected. In other words, the first filter bottle 01 and the second filter bottle 02 are detachably connected. In other words, the first bottle body 100 and the second bottle body 200 are detachably connected. The third filter element 30 is detachably connected to the first filter element 10 and communicates with the second water outlet channel 650.

[0034] After the first filter bottle 01 is connected to the second filter bottle 02, that is, after the first filter element 10 is connected to the second filter element 20 and the third filter element 30, the water passage between the first filter bottle 01 and the second filter bottle 02 is connected, and the third water flow channel 630 is connected to the second water inlet channel 620.

[0035] The water that needs to be filtered flows into the third water channel 630 through the second water inlet channel 620 and is filtered by the second filter media 21.

[0036] The water that needs to be filtered flows into the fourth water channel 640, and after being filtered by the third filter element 30, the filtered water flows out through the second water outlet channel 650.

[0037] The water filtration device in this embodiment includes a first filter element 10, a second filter element 20, and a third filter element 30. The third filter element 30 is disposed inside the second filter element 20. The first filter element 10 and the second filter element 20 are detachably connected, and the first filter element 10 is also detachably connected to the third filter element 30. In this way, when the lifespan of a filter element expires or it becomes clogged, each filter element can be replaced individually, reducing the cost of replacing the filter element.

[0038] For example, refer to Figure 3 When changing or repairing the filter element, separate the first filter bottle 01 and the second filter bottle 02. At this time, the first filter element 10 can be replaced individually. Remove the third filter element 30 from the second filter element 20. At this time, the second filter element 20 and the third filter element 30 can be replaced individually.

[0039] In some embodiments of this application, a third water outlet channel 660 is further provided inside the first filter element 10, and the third water outlet channel 630 is connected to the third water outlet channel 660.

[0040] Wastewater generated during the filtration process of the second filter media 21 is discharged through the third outlet channel 660. For example, the second filter media is an RO membrane.

[0041] In some embodiments of this application, reference is made to Figure 4 , Figure 5 , Figure 6 , Figure 11 as well as Figure 12 The first filter element 10 has a first inlet 141, a first outlet 142, a second inlet 143, and a second outlet 144 at its end. The first inlet 141 is connected to the inlet end of the first water channel 610, and the first outlet 142 is connected to the outlet end of the first water channel 610. The second inlet 143 is connected to the second inlet channel 620, and the second outlet 144 is connected to the second outlet channel 650.

[0042] The water flow process is as follows: (Refer to...) Figure 5 Raw water enters the first water flow channel 610 through the first inlet 141, and after being filtered by the first filter material 11, it becomes primary filtered water. The primary filtered water flows out of the first filter element 10 from the first outlet 142; (Refer to...) Figure 6 The primary filtered water passes through the water circuit board or external pipeline, then enters the second water flow channel through the second inlet 143, and then enters the third water flow channel 630 through the second inlet 620. After being filtered by the second filter material 21, it becomes secondary filtered water. The secondary filtered water then enters the fourth water flow channel 640 and is filtered by the third filter element 30 to obtain tertiary filtered water. The tertiary filtered water is discharged sequentially through the second outlet 650 and the second outlet 144.

[0043] Figure 5 Solid arrows represent water inflow, and dashed arrows represent water outflow. Figure 6 In the diagram, the arrows represent inlet water, single dashed arrows represent wastewater, and double dashed arrows represent purified water. In this embodiment, the water flow path first... Figure 5 The filtration process shown will then be performed. Figure 6 The filtration process is shown.

[0044] In this embodiment, the first filter material 11 is PP cotton, activated carbon, etc., and the first filter element 10 serves as a pre-filter to remove sediment, rust, and other large particulate impurities from the raw water, resulting in primary filtered water. The second filter material 21 is an RO membrane, nanofiltration, ultrafiltration, etc., which further filters out organic matter, residual chlorine, and other soluble impurities from the primary filtered water, resulting in secondary filtered water. The third filter material 31 is a carbon rod, etc., and serves as a post-filter to improve the taste of the secondary filtered water, resulting in tertiary filtered water.

[0045] Furthermore, the end of the first filter element 10 is also provided with a third outlet 145, which is connected to the third outlet channel 660. The wastewater generated when the first-stage filtered water is filtered by the second filter material 21 is discharged sequentially through the third outlet channel 660 and the third outlet 145.

[0046] The inlet and outlet of the entire filter cartridge assembly are concentrated at one end of the first filter element 10, facilitating connection to the external water circuit board. The water supply and outlet paths of the second filter bottle 02 both pass through the first filter element 10. The compact internal structure of the first filter element 10 contributes to the miniaturization and compact design of the filter cartridge assembly. Simultaneously, within the limited volume of the filter cartridge assembly, ample installation space is provided for the second filter media 21 and the third filter media 31, increasing the filter media volume and enhancing filtration capacity.

[0047] In some embodiments of this application, the water flow path is as follows: (Refer to...) Figure 6 Raw water enters the second inlet channel 620 through the second inlet 143, then enters the third inlet channel 630, and is filtered by the second filter media 21 to obtain primary filtered water. The primary filtered water then flows into the fourth inlet channel 640, is filtered by the third filter element 30 to obtain secondary filtered water, and then flows out through the second outlet channel 650 and the second outlet 144. (Refer to...) Figure 5 The secondary filtered water then passes through the water circuit board or external pipeline, enters the first water flow channel 610 through the first inlet 141, and is filtered by the first filter material 11 to obtain the tertiary filtered water, which then flows out from the first outlet 142.

[0048] Figure 5 Solid arrows represent water inflow, and dashed arrows represent water outflow. Figure 6 In the diagram, the arrows represent inlet water, single dashed arrows represent wastewater, and double dashed arrows represent purified water. In this embodiment, the water flow path first... Figure 6 The filtration process shown will then be performed. Figure 5 The filtration process is shown.

[0049] In this embodiment, the second filter material 21 is an RO membrane, nanofiltration, ultrafiltration, etc., which filters out organic matter, residual chlorine and other soluble impurities from the raw water to obtain primary filtered water. The third filter material 31 and the second filter material 21 are both used as post-filter cartridges, which can be activated carbon, etc., to improve the taste of the primary filtered water.

[0050] In this embodiment, the first filter element 10 is further provided with a third outlet 145 at its end, and the third outlet 145 is connected to the third outlet channel 660. Wastewater generated when the raw water is filtered by the second filter material 21 is discharged sequentially through the third outlet channel 660 and the third outlet 145.

[0051] In some embodiments of this application (not shown), raw water flows into the third water channel 630 through the second water inlet channel 620 and is filtered by the second filter material 21 to obtain primary filtered water; the primary filtered water flows into the fourth water channel 640 and is filtered by the third filter element 30 to obtain secondary filtered water; the secondary filtered water flows into the first water channel 610 and is filtered by the first filter element 10 to obtain tertiary filtered water.

[0052] In this embodiment, the second filter element 20 serves as a pre-filter, removing sediment, rust, and other large particulate impurities from the raw water to obtain primary filtered water. The third filter element 30, such as an RO membrane, nanofiltration, or ultrafiltration membrane, further filters out organic matter, residual chlorine, and other soluble impurities from the primary filtered water to obtain secondary filtered water. The first filter element 10 serves as a post-filter, improving the taste of the secondary filtered water to obtain tertiary filtered water.

[0053] In some embodiments of this application (not shown), the raw water flows through the second outlet channel 650 to the fourth water channel 640. At this time, the second outlet channel 650 serves as the inlet channel, and the water is filtered by the third filter element 30 to obtain primary filtered water. The primary filtered water flows to the third water channel 630 and is filtered by the second filter material 21 to obtain secondary filtered water. The secondary filtered water flows to the first water channel 610 and is filtered by the first filter material 11 to obtain tertiary filtered water.

[0054] In this embodiment, the third filter element 30 serves as a pre-filter element, removing sediment, rust, and other large particulate impurities from the raw water to obtain primary filtered water. The second filter material 21, such as an RO membrane, nanofiltration, or ultrafiltration membrane, further filters out organic matter, residual chlorine, and other soluble impurities from the primary filtered water to obtain secondary filtered water. The first filter material 11 serves as a post-filter element, improving the taste of the secondary filtered water to obtain tertiary filtered water.

[0055] In some embodiments of this application, reference is made to Figure 7 and Figure 8 The first filter bottle 01 is provided with a first end cap 410 and a second end cap 420, which are arranged at intervals along the axial direction of the first bottle body 100. Figure 13 This is a structural diagram of the first end cap 410. Figure 14This is a structural diagram of the second end cap 420.

[0056] Inside the first bottle body 100, a first tube 310, a second tube 320, and a third tube 330 are sequentially arranged radially towards the axis of the first bottle body 100. In other words, the first tube 310, the second tube 320, and the third tube 330 are all hollow cylindrical structures with open ends, nested sequentially from the outside in. A gap exists between the first tube 310 and the second tube 320, forming a second water inlet channel 620. A gap exists between the second tube 320 and the third tube 330, forming a third water outlet channel 660. The hollow cavity inside the third tube 330 forms a second water outlet channel 650. The three tubes are nested sequentially to form different water channels, resulting in a compact structure.

[0057] The first filter material 11 is disposed between the first end cap 410 and the second end cap 420, and the first end cap 410 and the second end cap 420 limit the first filter material 11. The first filter material 11 is disposed around the outer periphery of the first tube 310 and is located between the first tube 310 and the inner peripheral wall of the first bottle body 100, with a compact structure.

[0058] In some embodiments of this application, reference is made to Figure 8 , Figure 11 as well as Figure 12 On the inner wall of the first side end of the first bottle body 100, a first annular rib 121, a second annular rib 122, a third annular rib 123, a fourth annular rib 124, and a fifth annular rib 125 are sequentially arranged radially towards the axis of the first bottle body 100. A first annular groove 131 is formed between the first annular rib 121 and the inner peripheral wall of the first bottle body 100. A second annular groove 132 is formed between the first annular rib 121 and the second annular rib 122. A third annular groove 133 is formed between the second annular rib 122 and the third annular rib 123. A fourth annular groove 134 is formed between the third annular rib 123 and the fourth annular rib 124. A fifth annular groove 135 is formed between the fourth annular rib 124 and the fifth annular rib 125.

[0059] The second end of the first tube 310 is sealed to the second annular rib 122, and a sealing ring is provided at the connection. The second end of the second tube 320 is sealed to the third annular rib 123, and a sealing ring is provided at the connection. The second end of the third tube 330 is sealed to the fourth annular rib 124, and a sealing ring is provided at the connection.

[0060] The first inlet 141 is connected to the first annular groove 131, and the first outlet 142 is connected to the second annular groove 132. In other words, the inlet side of the first water channel 610 is connected to the first annular groove 131, and water flowing in from the first inlet 141 flows into the first water channel 610 through the first annular groove 131. The outlet side of the first water channel 610 is connected to the second annular groove 132, and water flowing out from the outlet side of the first water channel 610 flows out through the second annular groove 132 and the first outlet 142.

[0061] The second inlet 143 is connected to the third annular groove 133. In other words, the second inlet 143, the third annular groove 133 and the second inlet channel 620 are connected, and the water flowing in from the second inlet 143 flows into the second inlet channel 620 through the third annular groove 133.

[0062] The second outlet 144 is connected to the fifth annular groove 135. In other words, the inner cavity of the third tube 330, the fifth annular groove 135 and the second outlet 144 are connected, and the water flowing out from the third tube 330 flows out through the fifth annular groove 135 and the second outlet 144.

[0063] The third outlet 145 is connected to the fourth annular groove 134. In other words, the third outlet channel 660, the fourth annular groove 134 and the third outlet 145 are connected, and the water flowing out from the third outlet channel 660 flows out through the fourth annular groove 134 and the third outlet 145.

[0064] The first filter bottle 01 connects different functional water inlets with different water flow channels through the setting of multiple annular ribs and annular grooves, resulting in a compact structure.

[0065] In some embodiments of this application, reference is made to Figure 15 and Figure 16 A third end cap 430 is provided inside the second bottle body 200, which limits the second filter material 21 inside the second bottle body 200. Figure 22 This is a structural diagram of the third end cap 430.

[0066] The first end of the second bottle body 200 has an opening for the third end cap 430 to protrude. The third end cap 430 is detachably connected to the first end of the first bottle body 100. The first bottle body 100 is detachably connected to the second bottle body 200, and the third end cap 430 is detachably connected to the first bottle body 100. The first bottle body 100 limits the position of the third end cap 430, while simultaneously allowing water flow between the first bottle body 100 and the second bottle body 200 after docking. The second bottle body 200 does not require an additional structure to fix the third end cap 430; it relies on the first bottle body 100 to limit the position of the third end cap 430, resulting in a compact structure.

[0067] In some embodiments of this application, Figure 17This is a structural diagram of the third filter element 30. (Refer to...) Figure 4 , Figure 17 as well as Figure 22 The third end cap 430 is provided with an opening for the third filter element 30 to be exposed, and the first end of the first bottle body 100 is provided with an opening for the third tube 330 to be exposed. The water outlet end of the third filter element 30 is detachably connected to the third tube 330.

[0068] After the third filter element 30 is connected to the third tube 330, the water flow path where the third filter element 30 is located is connected to the second water outlet channel 650 inside the third tube 330. The second filter bottle 02 does not need to be equipped with an additional limiting structure for the third filter element 30. The third filter element 30 is limited inside the second filter bottle 02 by the third tube 330, resulting in a compact structure.

[0069] In some embodiments of this application, the first end of the first tube 310 is connected to the first end cap 410, and the first end of the first tube 310 is opposite to the second end. The first end cap 410 is provided with a first water inlet 413, and the first end of the first bottle body 100 is provided with a second water inlet 511. After the first filter bottle 01 and the second filter bottle 02 are connected, the second water inlet channel 620, the first water inlet 413, the second water inlet 511, and the water inlet end of the third water inlet channel 630 are connected in sequence.

[0070] The first end cap 410 serves to fix the first tube 310, and also to limit the position of the first filter material 11. The first end cap 410 is provided with a first water inlet 413, and also serves to connect the water passage. The first end cap 410 integrates multiple functions, which helps to achieve a compact design.

[0071] Since the third end cap 430 is fixed by the first bottle body 100, the water flowing out from the first water inlet 413 of the first end cap 410 will directly enter the third water flow channel 630 where the second filter material 21 is located, shortening the water path, simplifying the installation structure, increasing the volume of the filter material within the limited volume of the filter bottle, and helping to improve the filtration capacity.

[0072] In some embodiments of this application, the first end cap 410 has a plurality of spaced fifth extension ribs 415 on the side facing away from the first filter material 11, and a first water inlet 413 is formed between two adjacent fifth extension ribs 415. The fifth extension ribs 415 abut against the end of the first bottle body 100, which on the one hand limits the first end cap 410, and on the other hand maintains a gap between the first end cap 410 and the end of the first bottle body 100 to allow water to flow through.

[0073] In some embodiments of this application, the first end of the second tube 320 is connected to the first end of the first bottle 100, and the first end of the second tube 320 is opposite to the second end. A third water inlet 521 is provided on the first end of the first bottle 100, and a fourth water inlet 431 is provided on the third end cap 430. The water outlet end of the third water channel 630, the fourth water inlet 431, the third water inlet 521, and the third water outlet channel 660 are connected in sequence.

[0074] Since the third end cap 430 is limited and fixed by the first bottle body 100, when the first filter bottle 01 is connected to the second filter bottle 02, the third water flow channel 630 and the third water outlet channel 660 are connected through the third water inlet 521 and the fourth water inlet 431. Wastewater flowing out from the third water flow channel 630 can be directly discharged through the fourth water inlet 431, the third water inlet 521 and the third water outlet channel 660.

[0075] In some embodiments of this application, reference is made to Figure 8 and Figure 14 The second end cap 420 has a first extension rib 421 on the side opposite to the first filter material 11. The first extension rib 421 is sealed to the first annular rib 121 to achieve fixed installation of the second end cap 420. The second end cap 420 spans the first annular groove 131 and the second annular groove 132, and a water inlet is provided on the second end cap 420.

[0076] Reference Figure 8 and Figure 13 The first end cap 410 is sealed to the first bottle body 100, thus fixing the first end cap 410 inside the first bottle body 100. Water flowing into the first water channel 610 from the first inlet 141 is filtered by the first filter material 11, then flows into the second annular groove 132 through the water outlet on the second end cap 420, and then flows out from the first outlet 142.

[0077] In some embodiments of this application, reference is made to Figure 4 The first bottle body 100 is also provided with a fourth tube 340. The fourth tube 340 is located on the outer periphery of the first tube 310. The fourth tube 340 divides the space between the first tube 310 and the inner periphery of the first bottle body 100 into multiple sub-spaces. A first filter material 11 is provided in any sub-space, and the water channels in the multiple sub-spaces are connected in parallel.

[0078] Water flowing into the first water channel 610 from the first inlet 141 is distributed to each sub-space, filtered by the corresponding first filter media 11, and then flows out from the first outlet 142. When the first filter bottle 01 has a large diameter and a short length, arranging multiple first filter media 11 in parallel helps to improve the filtration capacity.

[0079] For example, a fourth tube 340 is provided inside the first bottle body 100. The fourth tube 340 divides the space between the first tube 310 and the inner peripheral wall of the first bottle body 100 into two sub-spaces. The outer sub-space is defined as the first outer water flow channel 611, and the inner sub-space is defined as the first inner water flow channel 612. The first outer water flow channel 611 is provided with a first outer filter material 011, and the first inner water flow channel 612 is provided with a first inner filter material 012.

[0080] In some embodiments of this application, reference is made to Figure 13 The first end cap 410 is provided with a first water passage hole 414 to connect the water inlet channels of two adjacent water channels. For example, the first water passage hole 414 connects the first outer water channel 611 with the first inner water channel 612.

[0081] Reference Figure 14 The second end cap 420 is provided with a second water passage hole 425, which is connected to the second annular groove 132. The filtered water after being filtered by the first filter material 11 flows into the second annular groove 132 through the second water passage hole 425 and then flows out through the first outlet 142.

[0082] Water flowing into the first annular groove 131 from the first inlet 141 first flows into the first outer water channel 611. Part of the water is filtered by the first outer filter material 011, while the other part flows into the first inner water channel 612 through the first water passage 414 and is filtered by the first inner filter material 012. The filtered water is then discharged through the second water passage 425.

[0083] The fourth tube 340 serves to separate the water channels. The first end cap 410 and the second end cap 420 serve both to install the first filter media 11 and to facilitate water flow. The first end cap 410 is sealed to the first bottle body 100, and the second end cap 420 is sealed to the first annular rib 121. The fourth tube 340 separates the water channels, forming a first external water flow channel 611 and a first internal water flow channel 612. The water passage holes on the first end cap 410 facilitate water diversion, while the water passage holes on the second end cap 420 facilitate water merging. In this way, multiple first filter media 11 can be connected in parallel within a limited space, which helps to improve water purification efficiency and effectiveness.

[0084] In some embodiments of this application, reference is made to Figure 14The second end cap 420 is provided with a second external water passage 4251 and a second internal water passage 4252. The second external water passage 4251 connects the first external water flow channel 611 to the second annular groove 132, and the second internal water passage 4252 connects the first internal water flow channel 612 to the second annular groove 132. Water in the first external water flow channel 611 flows back to the second annular groove 132 through the second external water passage 4251, and water in the first internal water flow channel 612 flows back to the second annular groove 132 through the second internal water passage 4252. In this way, the filtered water in the first external water flow channel 611 and the first internal water flow channel 612 can both flow back to the second annular groove 132 and then flow out together from the first outlet 142.

[0085] In some embodiments of this application, reference is made to Figure 14 The second end cap 420 has a plurality of second extension ribs 422 on the side opposite to the first filter material 11, and a second inner water passage hole 4252 is formed between two adjacent second extension ribs 422.

[0086] The end of the first tube 310 is provided with a first tube horizontal portion 311 and a first tube vertical portion 312. One side of the first tube horizontal portion 311 abuts against the third annular rib 123, and the other side abuts against the second extension rib 422. The first tube vertical portion 312 is sealed to the second annular rib 122.

[0087] The second extension rib 422 abuts against the transverse portion 311 of the first tube, further pressing and limiting the first tube 310. At the same time, the gap between two adjacent second extension ribs 422 forms a second inner water passage hole 4252, eliminating the need to additionally process water holes on the second end cap 420.

[0088] In some embodiments of this application, reference is made to Figure 8 The second end cap 420 has a first groove 423 and a second groove 424 on the side facing the first filter material 11. The first end cap 410 has a third groove 411 and a fourth groove 412 on the side facing the first filter material 11. The first outer filter material 011 is disposed between the first groove 423 and the third groove 411, and the first inner filter material 012 is disposed between the second groove 424 and the fourth groove 412. The first water passage hole 414 communicates with the fourth groove 412. (Refer to...) Figure 14 A stepped wall is provided between the first groove 423 and the second groove 424, and a second external water passage hole 4251 is provided on the stepped wall.

[0089] Thus, by setting grooves on the first end cap 410 and the second end cap 420, the multiple first filter media 11 can be partitioned, and water passages can be set at different positions on the first end cap 410 and the second end cap 420 to achieve water passage connection between the inner and outer water channels.

[0090] In some embodiments of this application, reference is made to Figure 7 and Figure 8 The first filter bottle 01 has a first protrusion 510 at its end. The first protrusion 510 extends circumferentially along the first filter bottle 01. A second water inlet 511 is provided on the platform of the first protrusion 510.

[0091] The first sidewall of the first protrusion 510 is sealed to the second filter bottle 02, thereby fixing the first bottle body 100 and the second bottle body 200. The second sidewall of the first protrusion 510 is sealed to the third end cap 430, thereby limiting and fixing the third end cap 430.

[0092] In some embodiments of this application, there is a gap between the third end cap 430 and the platform of the first protrusion 510. Water flowing out of the second water inlet 511 flows into the second filter bottle 02 through the gap, specifically into the third water channel 630. The gap ensures smooth water flow.

[0093] In some embodiments of this application, reference is made to Figure 21 Multiple spaced fourth extension ribs 231 are arranged along the circumference of the stepped portion 230, with a water inlet formed between two adjacent fourth extension ribs 231. Figure 4 The third end cap 430 abuts against the fourth extension rib 231, creating a gap between the third end cap 430 and the step portion 230 to allow water to flow through.

[0094] In some embodiments of this application, reference is made to Figure 7 and Figure 9 The end of the first filter bottle 01 is also provided with a second protrusion 520, the first protrusion 510 is arranged around the second protrusion 520, and a third water inlet 521 is provided on the platform of the second protrusion 520.

[0095] A slot 530 is formed between the second sidewall of the first protrusion 510 and the first sidewall of the second protrusion 520. A corresponding annular extension rib is provided on the third end cap 430. The extension rib is inserted into the slot 530 to achieve a fixed connection between the third end cap 430 and the first bottle body 100, and a seal is achieved by a sealing ring. The third water inlet 521 connects the water passage between the third water outlet 660 and the second filter material 21. The wastewater obtained after filtration by the second filter material 21 is discharged from the third water outlet 660.

[0096] Reference Figure 22 The third end cap 430 is provided with a plurality of third extension ribs 432, and a water inlet is formed between two adjacent third extension ribs 432. The wastewater generated by the second filter material 21 flows into the third water outlet channel 660 through the water inlet and the third water inlet 521.

[0097] The third end cap 430 is fixed to the first bottle body 100 by insertion. A second water inlet 511 is provided on the first boss 510 and a third water inlet 521 is provided on the second boss 520, so as to realize the connection of the water inlet and drainage flow path of the third water flow channel 630.

[0098] In some embodiments of this application, reference is made to Figure 16 The end of the second bottle body 200 is provided with a stepped portion 230, which extends toward the axis of the second filter bottle 02. The stepped portion 230 abuts against the third end cap 430 to limit the third end cap 430 into the second filter bottle 02.

[0099] In some embodiments of this application, reference is made to Figure 16 The second filter bottle 02 is provided with a third filter element 30, and the second filter material 21 is arranged around the third filter element 30. The filtered water obtained after filtration by the second filter material 21 flows into the third filter element 30. The end of the third filter element 30 is provided with a fourth end cap 440.

[0100] The second protrusion 520 has an opening on its surface for the third tube 330 to be exposed. The third tube 330 is sealed to the fourth end cap 440 to limit the third filter element 30 into the second filter bottle 02. The purified water obtained after filtration by the third filter element 30 flows out through the third tube 330.

[0101] Specifically, the fourth end cap 440 includes a first end cap section 441 and a second end cap section 442. A slot is formed within the second end cap section 442, and a water passage hole is formed within the first end cap section 441, which communicates with the slot. One end of the third filter element 30 is inserted into the slot of the second end cap section 442, and the insertion position is sealed by a sealing ring. The first end cap section 441 is inserted into the third tube 330, and the insertion position is sealed by a sealing ring. Thus, the fourth water channel 640 and the second water outlet channel 650 are connected through the fourth end cap 440. Water filtered by the third filter element 30 flows into the second water outlet channel 650 through the fourth end cap 440.

[0102] In some embodiments of this application, reference is made to Figure 4 The second bottle body 200 contains a fifth tube 350, and a third filter material 31 is disposed within the inner cavity of the fifth tube 350. The second filter material 21 surrounds the fifth tube 350. A water passage is provided on the fifth tube 350 to connect the third water channel 630 and the fourth water channel 640. Filtered water obtained after being filtered by the second filter material 21 in the third water channel 630 flows into the fifth tube 350 through this water passage and is then filtered by the third filter element 30. A section 441 of the fourth end cap is inserted into the fifth tube 350, and the insertion position is sealed by a sealing ring.

[0103] In some embodiments of this application, there are three seals at the docking position of the first filter bottle 01 and the second filter bottle 02. The first seal is the insertion seal between the first bottle body 100 and the second bottle body 200; the second seal is the insertion seal between the third end cap 430 and the first bottle body 100, specifically, the extension rib of the third end cap 430 is inserted into the slot 530 between the first boss 510 and the second boss 520; the third seal is the insertion seal between the fourth end cap 440 and the third tube 330. The first seal and the second seal cooperate with the second water inlet 511 provided on the first boss 510 to achieve communication between the second water inlet channel 620 and the third water channel 630. The second seal and the third seal cooperate with the third water inlet 521 provided on the second boss 520 to achieve communication between the third water channel 630 and the third water outlet channel 660.

[0104] In some embodiments of this application, reference is made to Figure 4 The first bottle body 100 includes a first bottle body 151 and a first bottle cap 152, which are fixed together by means of spin welding or other methods. One end of the first bottle body 151 is provided with various annular ribs, water inlets, and water outlets.

[0105] When assembling the first filter bottle 01, the first tube 310 is sealed and inserted into the second annular rib 122; the second tube 320 is sealed and inserted into the third annular rib 123; the third tube 330 is sealed and inserted into the fourth annular rib 124; the second end cap 420 is inserted and sealed into the first annular rib 121; the fourth tube 340 is installed onto the second end cap 420; one end of the first filter material 11 is installed onto the second end cap 420; the first end cap 410 is installed onto the other end of the first filter material 11, and at the same time, one end of the first tube 310 is sealed and inserted into the corresponding extension rib of the first end cap 410; the first bottle cap 152 is installed, and the first bottle cap 152 is fixedly connected to the first bottle body 151, and at the same time, the first end cap 410 is sealed and inserted into the first bottle cap 152, and one end of the second tube 320 is sealed and inserted into the first bottle cap 152, specifically, it is sealed and inserted into the inner wall of the second protrusion 520.

[0106] In some embodiments of this application, reference is made to Figure 4 The second bottle body 200 includes a second bottle body 221 and a second bottle cap 222, and the second bottle body 221 and the second bottle cap 222 are fixed together by means of spin welding or the like.

[0107] When assembling the second filter bottle 02, the second filter material 21 and the fifth tube 350 are installed into the second bottle body 221; the third filter element 30 is installed into the fifth tube 350; the third end cap 430 is installed into one end of the second filter material 21; the second bottle cap 222 is installed and fixedly connected to the second bottle body 221.

[0108] In some embodiments of this application, reference is made to Figure 9 and Figure 10 The first filter bottle 01 has a boss portion 500 and a first connecting portion 110 at its end. The boss portion 500 extends axially along the first filter bottle 01, and its outer diameter is smaller than that of the first filter bottle 01. The first connecting portion 110 is located on the outer periphery of the boss portion 500, and a water inlet is provided on the boss portion 500. Referring to the preceding text, the boss portion 500 includes a first boss 510 and a second boss 520, and the water inlet includes a second water inlet 511 and a third water inlet 521.

[0109] Reference Figures 18 to 20 An extension 240 is provided on the inner peripheral wall side of the second filter bottle 02 near its end. The extension 240 extends circumferentially along the second filter bottle 02 and has an annular structure. A second connecting portion 210 is provided on the outer peripheral side of the extension 240. In other words, the annular extension 240 is located on the inner side of the inner peripheral wall of the second bottle body 200, and there is a gap between the extension 240 and the inner peripheral wall of the second bottle body 200.

[0110] Combination Figure 4 After the first bottle body 100 and the second bottle body 200 are joined, the outer peripheral wall of the boss portion 500 and the inner peripheral wall of the extension portion 240 are sealed together, and a sealing ring is provided at the connection. The first connecting portion 110 and the second connecting portion 210 realize the fixed connection between the first filter bottle 01 and the second filter bottle 02. The first connecting portion 110 and the second connecting portion 210 are detachably connected. When it is necessary to replace the internal filter element, the connection between the first connecting portion 110 and the second connecting portion 210 should be disconnected first.

[0111] The water inlet on the boss 500 connects the water passage between the first filter bottle 01 and the second filter bottle 02. Specifically, as mentioned above, the second water inlet 511 connects the second water inlet channel 620 in the first filter bottle 01 with the third water inlet channel 630 in the second filter bottle 02, and the second water inlet 511 connects the third water inlet channel 630 with the third water outlet channel 660.

[0112] The connection point between the first connecting part 110 and the second connecting part 210 is located on the outer periphery of the boss 500, and a water passage is provided on the boss 500. In other words, the connection point between the first connecting part 110 and the second connecting part 210 is located on the outer periphery of the water passage after the first filter bottle 01 and the second filter bottle 02 are connected. The two are arranged radially along the filter bottle. In this way, with the same filter bottle device length, the length dimension of the filter bottle device can be effectively utilized, the volume occupied by the assembly and sealing structure can be reduced, the internal space of the filter bottle device can be increased, thereby increasing the filter media volume and improving the filtration capacity.

[0113] In some embodiments of this application, reference is made to Figure 10 The first connecting portion 110 includes a first connecting axial portion 111 and a first connecting radial portion 112. The first connecting axial portion 111 extends axially from the end of the first filter bottle 01, and also extends circumferentially along the first bottle body 100 for a certain distance. The first connecting radial portion 112 extends radially from the end of the first connecting axial portion 111, and a first groove 124 is formed between the first connecting axial portion 111 and the end face of the first filter bottle 01.

[0114] Reference Figures 18 to 20 The end face of the second filter bottle 02 is provided with a notch 212, and the second connecting portion 210 is located at the notch 212. The second connecting portion 210 includes a second connecting radial portion 211, which extends radially from the outer peripheral wall of the extension portion 240 and also extends a distance circumferentially along the second bottle body 200. One end of the second connecting radial portion 211 meets one end of the notch 212, and a second groove 214 is formed between the second connecting radial portion 211 and the notch 212.

[0115] Reference Figure 1 When assembling the first filter bottle 01 and the second filter bottle 02, place the first connecting part 110 at the notch 212, and then screw the first filter bottle 01 or the second filter bottle 02 to make the first filter bottle 01 and the second filter bottle 02 rotate relative to each other, so that the first connecting radial part 112 is engaged in the second slot 214 and the second connecting radial part 211 is engaged in the first slot 124, thus realizing the connection between the first filter bottle 01 and the second filter bottle 02.

[0116] When disassembling the first filter bottle 01 and the second filter bottle 02, simply twist the first filter bottle 01 or the second filter bottle 02 in the reverse direction to disconnect them. The first connecting part 110 and the second connecting part 210 are connected by a screw-on snap-fit ​​mechanism, which facilitates operation.

[0117] In some embodiments of this application, reference is made to Figure 19 and Figure 20 The second connecting radial portion 211 is located at one end of the notch portion 212, so that the other end of the notch portion 212 provides space for the first connecting portion 110. During installation, the first connecting portion 110 is placed at the other end of the notch portion 212, and then the first filter bottle 01 or the second filter bottle 02 is screwed on, so that the first connecting portion 110 can be rotated along the notch portion 212 to the second connecting portion 210 until it is engaged with the second connecting portion 210.

[0118] The second connecting radial portion 211 is located at one end of the notch portion 212. The junction position between the second connecting radial portion 211 and one end of the notch portion 212 plays a rotational limiting role for the first connecting portion 110. When the first connecting portion 110 rotates along the notch portion 212 to one end of the notch portion 212, it rotates into place and the first connecting portion 110 and the second connecting portion 210 are engaged.

[0119] In some embodiments of this application, reference is made to Figure 10 The first connecting radial portion 112 has a first stop portion 123 on the side facing the boss portion 500. (See reference...) Figure 19 A second stop portion 213 is provided on the outer side of the second connecting radial portion 211. The first stop portion 123 abuts against the second stop portion 213 to restrict the relative rotation between the first filter bottle 01 and the second filter bottle 02.

[0120] For example, the first stop part 123 is a protruding structure, and the second stop part 213 is a groove structure. The protruding structure is embedded in the groove structure to achieve the stop.

[0121] In some embodiments of this application, reference is made to Figure 20 The second connecting radial portion 211 is provided with a plurality of reinforcing ribs 215 on the side opposite to the notch portion 212, thereby improving the structural strength of the second connecting portion 210.

[0122] In some embodiments of this application, reference is made to Figure 9 The first filter bottle 01 has at least two first connecting portions 110 at its end, and the at least two first connecting portions 110 are arranged at intervals along the circumference of the first filter bottle 01. (Refer to...) Figure 20 The second filter bottle 02 is provided with at least two second connecting portions 210, which are arranged at intervals along the circumference of the second filter bottle 02. The at least two first connecting portions 110 and the at least two second connecting portions 210 are connected in a one-to-one correspondence, which helps to improve the connection reliability between the first filter bottle 01 and the second filter bottle 02.

[0123] For example, the first filter bottle 01 is provided with two first connecting parts 110, and the second filter bottle 02 is provided with two second connecting parts 210.

[0124] In some embodiments of this application, reference is made to Figure 9 The width W of the first connecting radial portion 112 of at least two first connecting portions 110 is different, which serves as a foolproof function, so that after the first filter bottle 01 and the second filter bottle 02 are connected, the internal water passage can be smoothly connected and connected.

[0125] In the description of the above embodiments, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0126] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A filter cartridge device, characterized in that, Including: The first filter element is provided with a first water flow channel, a second water inlet channel, and a second water outlet channel, and a first filter material is provided in the water flow path of the first water flow channel; The second filter element is provided with a third water flow channel and a fourth water flow channel, and a second filter material is provided in the water flow path between the third water flow channel and the fourth water flow channel; The third filter element is detachably installed in the fourth water flow channel; The first filter element is detachably connected to the second filter element, and the third water channel is connected to the second water inlet channel; The third filter element is detachably connected to the first filter element and communicates with the second water outlet channel.

2. The filter element device according to claim 1, characterized in that, The first filter element includes a first bottle body, and a first end cap and a second end cap are disposed inside the first bottle body. The first end cap and the second end cap are arranged at intervals along the axial direction of the first bottle body. The first bottle body is provided with a first tube, a second tube and a third tube, the first tube and the second tube form a second water inlet channel, the second tube and the third tube form a third water outlet channel, and the third tube forms the second water outlet channel; The first filter material is disposed between the first end cap and the second end cap.

3. The filter element device according to claim 2, characterized in that, The second filter element includes a second bottle body, and a third end cap is provided inside the second bottle body, the third end cap limiting the second filter material inside the second bottle body; The first end of the second bottle body is provided with an opening for the third end cap to be exposed, and the third end cap is detachably connected to the first end of the first bottle body.

4. The filter element device according to claim 3, characterized in that, The third end cap is provided with an opening for the third filter element to be exposed, and the first end of the first bottle is provided with an opening for the third tube to be exposed. The water outlet end of the third filter element is detachably connected to the third tube.

5. The filter element device according to claim 3, characterized in that, The first end of the second tube is connected to the first end of the first bottle body. A third water inlet is provided on the first end of the first bottle body, and a fourth water inlet is provided on the third end cap. The water outlet of the third water channel, the fourth water inlet, the third water inlet, and the third water outlet channel are connected in sequence.

6. The filter element device according to claim 2, characterized in that, The first end of the first tube is connected to the first end cap, the first end cap is provided with a first water inlet, the first end of the first bottle is provided with a second water inlet, and the second water inlet channel, the first water inlet, the second water inlet and the water inlet end of the third water inlet channel are connected in sequence.

7. The filter element device according to claim 2, characterized in that, The first bottle body is also provided with a fourth tube, which divides the first water channel into multiple sub-spaces. The first filter material is provided in any of the sub-spaces, and the water channels in the multiple sub-spaces are connected in parallel.

8. The filter element device according to any one of claims 1 to 7, characterized in that, The first filter element is provided with a first inlet, a first outlet, a second inlet, and a second outlet at its end. The first inlet is connected to the inlet end of the first water channel, the first outlet is connected to the outlet end of the first water channel, the second inlet is connected to the second inlet channel, and the second outlet is connected to the second outlet channel. Raw water flows sequentially through the first inlet and the first water channel, and after being filtered by the first filter material, it becomes primary filtered water, which flows out from the first outlet. The primary filtered water flows sequentially through the second inlet, the second inlet channel, and the third channel, and is filtered by the second filter media to obtain secondary filtered water. The secondary filtered water flows sequentially through the fourth water channel and the third filter element to obtain tertiary filtered water, which is then discharged sequentially through the second outlet channel and the second outlet.

9. The filter element device according to any one of claims 1 to 7, characterized in that, The first filter element is provided with a first inlet, a first outlet, a second inlet, and a second outlet at its end. The first inlet is connected to the inlet end of the first water channel, the first outlet is connected to the outlet end of the first water channel, the second inlet is connected to the second inlet channel, and the second outlet is connected to the second outlet channel. Raw water flows sequentially through the second inlet, the second inlet channel, and the third channel, and is filtered by the second filter media to obtain primary filtered water. The primary filtered water flows sequentially through the fourth water channel and the third filter element to obtain secondary filtered water, and the secondary filtered water is discharged sequentially through the second water outlet channel and the second water outlet. Secondary filtered water flows sequentially through the first inlet and the first water channel, and after being filtered by the first filter material, tertiary filtered water is obtained, which flows out from the first outlet.

10. The filter element device according to any one of claims 1 to 7, characterized in that, Raw water flows into the third water channel through the second inlet channel and is filtered by the second filter media to obtain primary filtered water. The primary filtered water flows into the fourth water channel and is filtered by the third filter element to obtain secondary filtered water. The secondary filtered water flows into the first water channel and is filtered by the first filter element to obtain tertiary filtered water.

Images