Cylinder, filter element assembly and water purifying device

Abstract

The application discloses a cylinder, a filter core assembly and a water purifying device. The cylinder is applied to the filter core assembly. The cylinder comprises a cylinder body and a liquid passing part. The cylinder body is provided with a first cavity, a mounting port and a liquid passing port which are in communication with the first cavity. The mounting port and the liquid passing port are arranged at opposite ends of the cylinder body. The liquid passing part is arranged on the outer wall of the cylinder body and is formed with a first channel which is arranged in separation from the first cavity. The liquid passing part is arranged in an integral manner with the cylinder body. The structure of the cylinder is optimized. When the cylinder is mounted in the filter core assembly, two stable and isolated water paths are easily formed. The internal structure of the filter core assembly is simplified and the filtering effect is improved.

Description

Technical Field

[0001] This invention relates to the field of water purification electrical appliances, and in particular to a cylinder, filter element assembly, and water purification device. 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 users replace the filter cartridges, both filter cartridges need to be replaced at the same time, which is more complicated. Moreover, the existing filter cartridge assembly has an unreasonable structural design, resulting in a complex internal structure and poor filtration effect. Summary of the Invention

[0003] The main objective of this invention is to provide a cylinder, a filter element assembly, and a water purification device, which aims to optimize the structure of the existing cylinder so that when the cylinder is installed inside the filter element assembly, it is easy to form two stable and isolated water paths, thereby simplifying the internal structure of the filter element assembly and improving the filtration effect.

[0004] To achieve the above objectives, the present invention provides a cylindrical body for use in filter element assemblies, comprising:

[0005] A cylindrical body having a first chamber and an installation port and a liquid passage port communicating with the first chamber, the installation port and the liquid passage port being located at opposite ends of the cylindrical body; and

[0006] The liquid passage is provided on the outer wall of the cylinder and forms a first channel that is separated from the first chamber. The liquid passage is integrally formed with the cylinder.

[0007] In one embodiment, the liquid-passing section is disposed on the outer side wall of the cylinder; the first channel is formed inside the liquid-passing section;

[0008] Alternatively, the liquid-passing section may be enclosed by the outer wall of the cylinder to form the first channel.

[0009] In one embodiment, the first channel extends axially along the cylinder body;

[0010] And / or, along the axial direction of the cylinder, the depth of the first chamber is greater than the length of the first channel;

[0011] And / or, in the axial section of the cylinder, the cross-sectional area of ​​the first chamber is greater than the cross-sectional area of ​​the first channel.

[0012] In one embodiment, the liquid-passing section includes a liquid-passing pipe section and a liquid-passing ring section connected to each other. The liquid-passing ring section is sleeved on the cylinder body, and the liquid-passing pipe section is located on one side of the cylinder body and communicates with the liquid-passing ring section.

[0013] In one embodiment, the inner diameter of the first chamber is larger than the inner diameter of the liquid passage section;

[0014] And / or, the opening width between the liquid-passing ring section and the cylinder body is greater than or equal to the inner diameter of the liquid-passing pipe section;

[0015] And / or, the maximum inner diameter of the liquid passage section is D1, wherein D1 satisfies: 8mm≤D1≤16mm.

[0016] In one embodiment, the cylinder further includes an annular boss, which is disposed on the outer wall of the liquid passage section and the cylinder body, and an annular groove is provided on the outer peripheral wall of the annular boss.

[0017] The present invention also proposes a filter element assembly, comprising the cylinder as described above.

[0018] In one embodiment, the filter assembly further includes:

[0019] The outer shell has a receiving cavity and a first water inlet, a first water outlet, a second water inlet, and a second water outlet communicating with the receiving cavity; the cylindrical body is disposed within the receiving cavity, and a second chamber is formed between the outer wall of the cylindrical body and the inner wall of the outer shell, the second chamber communicating with a first channel of the cylindrical body; the first water inlet and the first water outlet are communicating with the first chamber, the second water inlet is communicating with one of the second chamber and the first channel, and the second water outlet is communicating with the other of the second chamber and the first channel;

[0020] A first filter element is disposed within the first chamber; and

[0021] The second filter element is disposed in the second chamber.

[0022] In one embodiment, the filter element assembly further includes a third filter element sleeved outside the cylinder body. The third filter element is located at one end of the liquid passage portion away from the first water inlet and the second water inlet. The third filter element has a second channel that connects the second chamber and the first channel. A portion of the third filter element extends into the liquid passage portion and abuts against and seals against the liquid passage portion.

[0023] In one embodiment, the filter element assembly further includes an adapter end cap disposed at one end of the cylinder near the first water inlet and the second water inlet, a portion of the liquid passage part and the cylinder body extending into the adapter end cap, and the cylinder body being sealed to the adapter end cap by a sealing ring disposed outside the liquid passage part.

[0024] In one embodiment, the liquid-passing part extending into the adapter end cap and the outer wall of the cylinder body are provided with an annular boss, and the annular boss is provided with an annular groove for holding the sealing ring.

[0025] In one embodiment, the filter element assembly further includes a first end cap for sealing the end of the first filter element away from the first outlet. A first flow channel is formed between the first filter element and the inner wall of the cylinder. The first end cap is disposed in the first chamber and cooperates with the outer shell to form a liquid passage connecting the second channel and the first flow channel. A valve body is provided in the liquid passage for unidirectional flow from the second channel to the first flow channel.

[0026] 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 first end cap. 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.

[0027] In one embodiment, the third channel includes a plurality of first grooves provided on the bottom wall of the receiving cavity, and the end of the first end cap away from the first filter element is provided with a second groove that connects the plurality of first grooves and the fourth channel. When the water pressure in the second groove is greater than the water pressure in the first flow channel, the valve body unidirectionally guides the water path from the second groove to the first flow channel.

[0028] In one embodiment, the first filter element is a hollow structure to form a hollow cavity in the first chamber. The first outlet communicates with the hollow cavity through a second end cap disposed at one end of the first filter element. The filter element assembly further includes a fourth filter element disposed in the hollow cavity. The second end cap is provided with a first interceptor for intercepting the fourth filter element from flowing outward. The first interceptor is disposed in the first chamber.

[0029] The present invention also proposes a water purification device, including a body and a filter element assembly as described above, wherein the filter element assembly is disposed within the body.

[0030] The cylinder of the present invention includes a cylinder body and a liquid-passing section. The cylinder body has a first chamber and an installation port and a liquid-passing port communicating with the first chamber. The installation port and the liquid-passing port are located at opposite ends of the cylinder body. The liquid-passing section is located on the outer wall of the cylinder body and forms a first channel that is separated from the first chamber. The liquid-passing section is integrally formed with the cylinder body, so that the first chamber of the cylinder body can be supplied with water flow and the first channel can also be supplied with water flow. That is, the cylinder body of the present application can form two separate water paths that do not affect each other. Furthermore, the liquid-passing section is integrally formed with the cylinder body, so that the cylinder body is a single part. When the cylinder body is installed in the filter element assembly, it is easy to form two stable and isolated water path channels. The structure of the cylinder body is simple and can also reduce the volume occupied in the filter element assembly, which is beneficial to improving the utilization rate of the filter material in the filter element assembly, thereby optimizing the internal structure of the filter element assembly and improving the filtration effect. Attached Figure Description

[0031] 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.

[0032] Figure 1 This is a schematic diagram of the structure of one embodiment of the cylindrical body of the present invention;

[0033] Figure 2 for Figure 1 A sectional view of the structure in the middle;

[0034] Figure 3 This is a schematic diagram of the structure of the first embodiment of the filter element assembly of the present invention;

[0035] Figure 4 for Figure 3 A schematic diagram of the structure after structural decomposition;

[0036] Figure 5 for Figure 3 A sectional view of the structure in the middle;

[0037] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0038] Figure 7 for Figure 5 A partial structural diagram of the structure in the diagram;

[0039] Figure 8 for Figure 5 A schematic diagram of water flow when the valve body is not open;

[0040] Figure 9 for Figure 5 A schematic diagram showing water flow when the valve body is open;

[0041] Figure 10 for Figure 4 A cross-sectional view of the first end cap;

[0042] Figure 11 for Figure 4 A cross-sectional view of the third filter element;

[0043] Figure 12 This is a cross-sectional view of a second embodiment of the filter element assembly of the present invention;

[0044] Figure 13 This is a cross-sectional view of a third embodiment of the filter element assembly of the present invention;

[0045] Figure 14 This is a cross-sectional view of a fourth embodiment of the filter cartridge assembly of the present invention.

[0046] Explanation of icon numbers:

[0047]

[0048]

[0049] 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

[0050] 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.

[0051] 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.

[0052] 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.

[0053] The present invention proposes a cylindrical body, a filter element assembly including the cylindrical body, and a water purification device including the filter element assembly. When the cylindrical body is installed inside the filter element assembly, it is easy to form two stable and isolated water paths, thereby simplifying the internal structure of the filter element assembly and improving the filtration effect.

[0054] Please see Figures 1 to 4 In one embodiment of the cylinder 10 of the present invention, the cylinder 10 is applied to the filter element assembly 20. The cylinder 10 includes a cylinder body 11 and a liquid passage portion 12. The cylinder body 11 has a first chamber 111 and an installation port 112 and a liquid passage port 113 communicating with the first chamber 111. The installation port 112 and the liquid passage port 113 are located at opposite ends of the cylinder body 11. The liquid passage portion 12 is located on the outer wall of the cylinder body 11 and forms a first channel 121 that is separated from the first chamber 111. The liquid passage portion 12 is integrally formed with the cylinder body 11.

[0055] It is understood that the mounting port 112 is used for inserting external parts into the cylinder body 11 through the mounting port 112. Of course, the mounting port 112 can also be used for water flow, and the liquid outlet 113 is used for water inflow and / or outflow; the specifics are not limited here. In this embodiment, the mounting port 112 and the liquid outlet 113 are located at opposite ends of the cylinder body 11 along the axial direction of the cylinder body 11, thus making the structure of the cylinder body 11 more regular. Furthermore, the opening area of ​​the mounting port 112 is larger than the opening area of ​​the liquid outlet 113, making it easier for external parts to be inserted into the first chamber 111 through the mounting port 112.

[0056] Furthermore, the first channel 121 is located outside the first chamber 111, and the first channel 121 is separated from the first chamber 111, that is, the first channel 121 and the first chamber 111 are completely isolated, and the first channel 121 and the first chamber 111 can form two water channels without affecting each other. The liquid-passing part 12 and the cylinder body 11 can be integrally injection molded, integrally stamped, or other methods, which are not limited here. The liquid-passing part 12 and the cylinder body 11 are integrally set, so that the cylinder body 10 is a single part. The structure of the first channel 121 and the first chamber 111 formed by a single part is stable, which also helps to reduce the volume of the cylinder body 10. It avoids the situation where the cylinder body 10 has a complex structure and occupies a lot of space due to the combination of at least two parts to form the first chamber 111 and the first channel 121. The structure of the cylinder body 10 in this solution is simple, small in size and easy to manufacture. The cylinder body 10 occupies less space when installed in the filter element assembly 20.

[0057] The cylinder 10 of the present invention includes a cylinder body 11 and a liquid-passing section 12. The cylinder body 11 has a first chamber 111 and an installation port 112 and a liquid-passing port 113 communicating with the first chamber 111. The liquid-passing section 12 is disposed on the outer wall of the cylinder body 11 and forms a first channel 121 that is separated from the first chamber 111. The liquid-passing section 12 is integrally disposed with the cylinder body 11, so that the first chamber 111 of the cylinder body 10 can be supplied with water flow and the first channel 121 can also be supplied with water flow. That is, the cylinder body 10 of the present application can form two separate water paths that do not affect each other. Furthermore, the liquid-passing section 12 is integrally disposed with the cylinder body 11, so that the cylinder body 10 is a single part. When the cylinder body 10 is installed in the filter element assembly 20, it is easy to form two stable and isolated water path channels. The structure of the cylinder body 10 is simple and can also reduce the volume occupied in the filter element assembly 20, which is beneficial to improving the occupancy rate of the filter material in the filter element assembly 20, thereby optimizing the internal structure of the filter element assembly 20 and improving the filtration effect.

[0058] In one embodiment, the liquid-passing portion 12 is disposed on the outer wall of the cylinder body 11; the first channel 121 is formed inside the liquid-passing portion 12; or, the liquid-passing portion 12 and the outer wall of the cylinder body 11 enclose each other to form the first channel 121. It is understood that the first channel 121 can be formed by the liquid-passing portion 12 itself, or by the liquid-passing portion 12 and the cylinder body 11 enclosing each other; the specific form is not limited here, as long as the first channel 121 is separated from the first chamber 111. In this application, the first channel 121 is formed by the liquid-passing portion 12 and the outer wall of the cylinder body 11, which is beneficial for improving the utilization rate of the cylinder body 11 and reducing the volume of the cylinder 10.

[0059] In one embodiment, the first channel 121 extends axially along the cylinder 10. It is understood that the first chamber 111 may also extend axially along the cylinder 10, and the liquid passage 12 extends axially on the outer wall of the cylinder 11, which is beneficial to improving the smoothness of water flow in the first channel 121 and the first chamber 111.

[0060] In one embodiment, along the axial direction of the cylinder 10, the depth of the first chamber 111 is greater than the length of the first channel 121. It is understood that the liquid-passing portion 12 is disposed on the outer wall of the cylinder 11. By limiting the length of the first channel 121 to be less than the length of the first chamber 111, the length of the liquid-passing portion 12 is less than the length of the cylinder 11. The liquid-passing portion 12 does not extend beyond the cylinder 11 along the axial direction of the cylinder 10, which helps to improve the structural stability of the cylinder 10 and reduce its volume.

[0061] In one embodiment, the cross-sectional area of ​​the first chamber 111 in the axial section of the cylinder 10 is larger than the cross-sectional area of ​​the first channel 121. It is understood that the first chamber 111 can be used to house the first filter element 22, and the first channel 121 is used for water flow. To improve the filtration effect of the first filter element 22, the first chamber 111 requires a larger space to house it, while the first channel 121 only needs to allow water flow. By limiting the cross-sectional area of ​​the first chamber 111 to be larger than that of the first channel 121, the functionality of the cylinder 10 is ensured while reducing its volume. This reduces the volume occupied when the cylinder 10 is installed within the filter element assembly 20, thereby increasing the utilization rate of the filter media within the filter element assembly 20.

[0062] Please see Figure 1 and Figure 2 In one embodiment, the liquid-passing section 12 includes a liquid-passing pipe section 122 and a liquid-passing ring section 123 connected to each other. The liquid-passing ring section 123 is sleeved on the cylinder body 11, and the liquid-passing pipe section 122 is located on one side of the cylinder body 11 and communicates with the liquid-passing ring section 123.

[0063] It is understandable that the liquid passage section 122 is located on one side of the cylinder body 11. The liquid passage section 122 can be elongated to allow water to flow smoothly within the liquid passage section 122. The liquid passage ring section 123 is fitted onto the cylinder body 11. The liquid passage ring section 123 is ring-shaped, which helps to gather water together. In other words, when water flows along the first channel 121, water can gather within the liquid passage ring section 123 and flow smoothly within the liquid passage section 122.

[0064] In one embodiment, the inner diameter of the first chamber 111 is larger than the inner diameter of the liquid-passing pipe section 122. It is understood that the first chamber 111 can be used to house the first filter element 22, and the interior of the liquid-passing pipe section 122 is used for water flow. By limiting the inner diameter of the first chamber 111 to be larger than the inner diameter of the liquid-passing pipe section 122, sufficient space is ensured in the first chamber 111 to house the first filter element 22, and the inner diameter of the liquid-passing pipe section 122 is kept small, resulting in a smaller volume of the liquid-passing pipe section 122 and thus a smaller volume of the cylinder 10. The inner diameter of the first chamber 111 can be the radial width of the first chamber 111 along the cylinder 10, and the inner diameter of the liquid-passing pipe section 122 can be the radial opening width of the liquid-passing pipe section 122 along the cylinder 10.

[0065] In one embodiment, the opening width between the liquid-passing ring section 123 and the cylinder body 11 is greater than or equal to the inner diameter of the liquid-passing pipe section 122. It is understood that the opening width between the liquid-passing ring section 123 and the cylinder body 11 is the minimum width between the inner wall of the liquid-passing ring section 123 and the outer wall of the cylinder body 11, and the inner diameter of the liquid-passing pipe section 122 is the opening width of the liquid-passing pipe section 122 along the radial direction of the cylinder body 10. By limiting the opening width between the liquid-passing ring section 123 and the cylinder body 11 to be greater than or equal to the inner diameter of the liquid-passing pipe section 122, it is beneficial for water to accumulate in the liquid-passing ring section 123 and then flow smoothly into the liquid-passing pipe section 122. It also provides sufficient space for the liquid-passing ring section 123 to seal with the filter element in the filter element assembly 20, ensuring the sealing of the inlet of the first channel 121.

[0066] Please see Figure 2 In one embodiment, the maximum inner diameter of the liquid-passing pipe section 122 is D1, where D1 satisfies: 8mm ≤ D1 ≤ 16mm. This setting limits the width of the liquid-passing pipe section 122 by limiting its maximum inner diameter, thus limiting the volume of the liquid-passing section 122 and the space it occupies within the filter element assembly 20. This ensures that the liquid-passing pipe section 122 occupies less space while allowing for smooth water flow. A smaller volume of the liquid-passing pipe section 122 helps increase the utilization rate of the filter media within the filter element assembly 20, thereby improving the filtration effect of the filter element assembly 20. The value of D1 can be 8mm, 10mm, 12mm, 14mm, or 16mm, etc., and is not specifically limited here.

[0067] Please see Figure 1 and Figure 2In one embodiment, the cylinder 10 further includes an annular boss 13, which is disposed on the outer wall of the liquid passage section 122 and the cylinder body 11. An annular groove 14 is provided on the outer peripheral wall of the annular boss 13. It is understood that the annular groove 14 is suitable for holding the sealing ring. The sealing ring is disposed in the annular groove 14 so as to facilitate the contact and sealing between the outer wall of the cylinder 10 and the parts in the filter element assembly 20, thereby ensuring the sealing performance when the water flows along the first channel 121. The annular groove 14 also facilitates the assembly of the sealing ring.

[0068] The present invention also proposes a filter element assembly 20, which includes a cylindrical body 10 as described above. The specific structure of the cylindrical body 10 is as described in the above embodiments. Since the filter element assembly 20 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.

[0069] Please see Figures 3 to 7 In one embodiment, the filter element assembly 20 further includes a housing 21, a first filter element 22, and a second filter element 23. The housing 21 has a receiving cavity and a first inlet 211, a first outlet 212, a second inlet 213, and a second outlet 214 communicating with the receiving cavity. The cylindrical body 10 is disposed within the receiving cavity, and a second chamber 215 is formed between the outer wall of the cylindrical body 10 and the inner wall of the housing 21. The second chamber 215 communicates with a first channel 121 of the cylindrical body 10. The first inlet 211 and the first outlet 212 communicate with the first chamber 111. The second inlet 213 communicates with one of the second chamber 215 and the first channel 121, and the second outlet 214 communicates with the other of the second chamber 215 and the first channel 121. The first filter element 22 is disposed within the first chamber 111, and the second filter element 23 is disposed within the second chamber 215.

[0070] It is understood that a receiving cavity is formed inside the outer shell 21 for accommodating the cylinder 10, the first filter element 22, and the second filter element 23. To ensure that the first filter element 22 and the second filter element 23 have a large size and filtration path, the outer shell 21 can be configured as a cuboid or cylindrical structure. Of course, in other embodiments, the outer shell 21 can also be an irregular shape, so that the outer shell 21 can be fitted into the internal structure of the water purification device, thereby achieving the purpose of saving space.

[0071] Furthermore, the first water inlet 211 and the second water inlet 213 can be located at the same end of the outer casing 21, or they can be located at different ends of the outer casing 21; the first water outlet 212 and the second water outlet 214 can be located at the same end of the outer casing 21, or they can be located at different ends of the outer casing 21, and the specific location is not limited here. In this embodiment, the first water inlet 211, the first water outlet 212, the second water inlet 213, and the second water outlet 214 are located at the same end of the outer casing 21. Specifically, one end of the outer casing 21 is provided with a mounting portion, which can protrude from the end face of the outer casing 21, or it can be located inside the outer casing 21. The mounting portion forms a first water inlet 211, a first water outlet 212, a second water inlet 213, and a second water outlet 214 that communicate with the receiving cavity. The mounting portion is used to connect the water supply and drainage structures of the water purification device.

[0072] The mounting part and the outer casing 21 can be integrally formed, with the mounting part formed at the end of the outer casing 21. This results in better sealing of the outer casing 21 and lower manufacturing costs. Alternatively, the mounting part and the outer casing 21 can be independent components. The mounting part is mounted on the outer casing 21 by a locking member, or the mounting part is itself snapped into the outer casing 21, with a sealed connection between the two. In this way, the outer casing 21 and the mounting part are independent parts, which is beneficial for the assembly of the filter element assembly 20.

[0073] The filter element assembly 20 of the present invention includes a housing 21, a cylindrical body 10, a first filter element 22, and a second filter element 23. The cylindrical body 10 is disposed within a receiving cavity and has a first chamber 111 and a first channel 121 separated from each other. The first channel 121 is located outside the first chamber 111. A second chamber 215 is formed between the outer wall of the cylindrical body 10 and the inner wall of the housing 21. The second chamber 215 communicates with the first channel 121. When water flows into the first chamber 111 from the first inlet 211 and is filtered by the first filter element 22, the filtered water can flow out from the first outlet 212 (e.g., ...). Figure 8 (as indicated by the thin arrow); when water flows into the second chamber 215 and the first channel 121 from the second inlet 213 and is filtered by the second filter element 23, the filtered water can flow out from the second outlet 214 (as shown by the arrow). Figure 8 (As indicated by the thick arrow), the first chamber 111 and the first channel 121 are separated. The first chamber 111 and the second chamber 215 are independent of each other, and their internal filtration processes do not affect each other, ensuring the reliability of the filter element assembly 20. Furthermore, the two filter elements are combined in one housing 21, which helps to simplify the piping of the filter element assembly 20 in the water purification device, making the water purification device occupy less space. Moreover, replacing one filter element assembly 20 can achieve the purpose of replacing two filter elements, thus reducing the number of times the filter element assembly 20 needs to be replaced.

[0074] Furthermore, since the second chamber 215 is formed by the outer wall of the cylinder 10 and the inner wall of the outer shell 21, the second chamber 215 has a longer length in the axial direction of the cylinder 10. The second filter element 23 disposed in the second chamber 215 can have a longer distance in the axial direction of the cylinder 10, thus increasing the length of water passing through the second filter element 23 and improving the filtration effect of the second filter element 23 on water. In addition, the second chamber 215 is connected to the first channel 121 inside the cylinder 10. The water passage through the second chamber 215 makes full use of the space inside the cylinder 10, so that the volume of the second chamber 215 is larger under the premise that the outer shell 21 is the same length, thereby accommodating more second filter elements 23. The second filter element 23 has a high volume occupancy rate in the accommodating cavity, thereby improving the filtration effect of the filter element assembly 20.

[0075] Please see Figure 5 , Figure 7 and Figure 11 In one embodiment, the filter element assembly 20 further includes a third filter element 24 sleeved outside the cylinder body 11. The third filter element 24 is disposed at one end of the liquid passage 12 away from the first water inlet 211 and the second water inlet 213. The third filter element 24 has a second channel 241, which connects the second chamber 215 and the first channel 121. Part of the third filter element 24 extends into the liquid passage 12 and abuts and seals against the liquid passage 12.

[0076] It is understandable that by setting a third filter element 24 outside the cylinder body 11, the water can enter the second chamber 215 and be filtered by the second filter element 23, and then enter the second channel 241 and be filtered by the third filter element 24. The filtered water then flows out from the first channel 121, thus improving the filtration effect of the filter element assembly 20.

[0077] The second filter element 23 can be made of granular activated carbon. When the granular activated carbon has a sufficient length along the axis of the outer shell 21, 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 axis of the outer shell 21 is not less than 30 mm, thus ensuring that the removal rate of chloroform in the water by the second filter element 23 reaches more than 95% during the filtration process, meeting national standards.

[0078] Furthermore, the third filter element 24 is a post-filter. For example, when the second filter element 23 is made of granular activated carbon, the third filter element 24 can be made of a microfiltration membrane, such as a folded multilayer microfiltration membrane; or, the third filter element 24 can be made of PP cotton that can intercept carbon powder, and the specifics are not limited here. The third filter element 24 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 20 from having black carbon powder.

[0079] Furthermore, a portion of the third filter element 24 extends into the liquid passage section 12 and abuts against and seals with the liquid passage section 12. An annular groove may be provided on the outer peripheral wall of the third filter element 24, and a sealing ring is fitted into the annular groove. The third filter element 24 extending into the liquid passage section 12 abuts against and seals with the inner wall of the liquid passage section 12 through the sealing ring. This ensures the sealing performance between the third filter element 24 and the cylinder 10, avoids gaps between the third filter element 24 and the liquid passage section 12 that would affect the filtration effect of the second filter element 23 and the third filter element 24, and improves the reliability of the filter element assembly 20.

[0080] Please see Figure 7 and Figure 11 In one embodiment, the third filter element 24 includes a cover and a filter unit 242. The cover has an annularly arranged accommodating cavity and an inlet hole 245 and an outlet hole 246 communicating with the accommodating cavity. The filter unit 242 is disposed within the accommodating cavity, with the inlet hole 245 located on the outer wall of the cover and the outlet hole 246 located on the inner wall of the cover. This arrangement allows water to flow radially through the filter unit 242 for filtration along the cylinder 10. The cover includes an upper end cover 243 and a lower end cover 244. The upper end cover 243 is detachably mounted on the lower end cover 244 to enclose the annularly arranged accommodating cavity. Furthermore, the cover is annularly arranged, and a gap exists between the inner wall of the cover and the outer wall of the cylinder 11, allowing water filtered by the filter unit 242 to flow into this gap from the outlet hole 246, and subsequently into the first channel 121.

[0081] In one embodiment, the liquid-passing section 12 includes a liquid-passing pipe section 122 and a liquid-passing ring section 123 connected to each other. The liquid-passing ring section 123 is sleeved on the cylinder body 11. The liquid-passing pipe section 122 is located on one side of the cylinder body 11 and communicates with the liquid-passing ring section 123. The third filter element 24 is sleeved outside the cylinder body 11, and part of the third filter element 24 extends into the liquid-passing ring section 123 and abuts and seals against the liquid-passing ring section 123.

[0082] Understandably, the third filter element 24 is fitted around the cylinder body 11 and abuts against and seals against the annular liquid-passing ring section 123. A sealing ring is fitted on the outer peripheral wall of the third filter element 24. This simplifies the sealing method between the third filter element 24 and the liquid-passing ring section 123, making assembly easier and improving the reliability of the seal and the convenience of assembly. Furthermore, the annular arrangement of the liquid-passing ring section 123 helps to gather water together, so that when water flows from the second channel 241 into the first channel 121, the water flow can first gather in the liquid-passing ring section 123 and then flow smoothly into the liquid-passing pipe section 122, thus improving the smoothness of water flow through the first channel 121.

[0083] Please see Figures 4 to 6 In one embodiment, the filter element assembly 20 further includes an adapter end cap 26 disposed at one end of the cylinder 10 near the first water inlet 211 and the second water inlet 213. Part of the liquid passage portion 12 and the cylinder body 11 extend into the adapter end cap 26, and the cylinder body 10 is sealed to the adapter end cap 26 by a sealing ring disposed outside the liquid passage portion 12.

[0084] Understandably, the adapter end cap 26 is located within the second chamber 215 and at one end of the cylinder 10. The adapter end cap 26 mates with the cylinder 10, and the cylinder 10 and the adapter end cap 26 abut and seal. The outer wall of the adapter end cap 26 and the outer wall of the cylinder 10 form the water inlet channel of the second filter element 23 between the inner wall of the outer shell 21 and the outer wall of the cylinder 11. The inner wall of the adapter end cap 26 and the outer wall of the cylinder 11 form the water outlet channel of the second filter element 23, which connects the first channel 121 and the first outlet 212. By extending part of the liquid-passing part 12 and the cylinder 11 into the adapter end cap 26 and using the sealing ring outside the liquid-passing part 12 for abutment and sealing, the sealing method is simple and can also fix the adapter end cap 26 to ensure the stability of the adapter end cap 26 installed in the outer shell 21.

[0085] In one embodiment, an annular boss 13 is provided on the outer wall of the liquid-passing part 12 and the cylinder body 11, which extend into the adapter end cap 26. The annular boss 13 is provided with an annular groove 14 for holding the sealing ring. It can be understood that by providing an annular boss 13 on the outer wall of the liquid-passing part 12 and the cylinder body 11, not only is the structural strength of the cylinder body 10 strengthened, but it is also easy to form an annular groove 14 on the annular boss 13, so as to simplify the way to hold and fix the sealing ring, thereby simplifying the internal structure of the filter element assembly 20.

[0086] Please see Figure 5 , Figure 7 and Figure 10In one embodiment, the filter element assembly 20 further includes a first end cap 27 for sealing the end of the first filter element 22 away from the first outlet 212. A first flow channel 221 is formed between the first filter element 22 and the inner wall of the cylinder 11. The first end cap 27 is disposed in the first chamber 111 and cooperates with the outer shell 21 to form a liquid passage connecting the second channel 241 and the first flow channel 221. A valve body 28 is provided in the liquid passage for unidirectional flow from the second channel 241 to the first flow channel 221.

[0087] It is understood that the first filter element 22 can be a pre-filter element. A first flow channel 221 is formed between the first filter element 22 and the inner wall of the cylinder body 11. The first filter element 22 has a hollow structure to form a hollow cavity 222, which is also the second flow channel. When water flows into the first flow channel 221 from the first inlet 211, the water flows into the hollow cavity 222 after being filtered by the first filter element 22, that is, after flowing into the second flow channel, it flows out from the first outlet 212.

[0088] Furthermore, when the valve body 28 in the liquid passage is unidirectionally open, the water in the second channel 241 can flow through the valve body 28 to the first flow channel 221. That is, when the valve body 28 is open, the second inlet 213 continuously supplies water to the second chamber 215, so that the water can pass through the second filter element 23 and the third filter element 24 in sequence. The filtered water can flow into the inlet end of the first filter element 22 under the action of the liquid passage and the valve body 28, and flow out from the first outlet 212 after being filtered by the first filter element 22. In other words, by setting up a liquid passage and a one-way valve body 28, the water flowing into the second chamber 215 can be filtered sequentially by the second filter element 23, the third filter element 24, and the first filter element 22. This not only improves the filtration effect, but also allows the pure water filtered by the third filter element 24 to flush the inlet end of the first filter element 22. That is, the raw water on the raw water side of the first filter element 22 is replaced with pure water filtered by the third filter element 24, reducing the TDS concentration on the raw water side of the first filter element 22 when it is in use. This avoids the problem of TDS increase in the first cup of water output after the first filter element 22 of the filter element assembly 20 has been left unused for a long time, that is, reducing the TDS concentration of the first cup of water.

[0089] Furthermore, the water flow process during unidirectional flow of the valve body 28 will now be described in detail. When water flows into the second chamber 215 from the second inlet 213, it is filtered by the second filter element 23. The filtered water then flows into the second channel 241 and is filtered by the third filter element 24. The filtered water then flows into the liquid passage and, after passing through the valve body 28, flows into the first flow channel 221. The pure water in the first flow channel 221 is filtered by the first filter element 22 and flows into the hollow cavity 222 of the first filter element 22, and then flows out through the first outlet 212. This allows the pure water filtered by the third filter element 24 to flow into the first chamber 111 to flush the raw water side of the first filter element 22, thereby improving the filtration effect of the first filter element 22 and reducing the TDS concentration of the first cup of water at the first outlet 212.

[0090] Please see Figure 7 and Figure 9 In one embodiment, the liquid passage includes a third channel 271 and a fourth channel 272. The third channel 271 is disposed on the bottom wall of the receiving cavity away from the first water inlet 211, and the fourth channel 272 is disposed on the first end cap 27. The second channel 241, the third channel 271, the fourth channel 272 and the first flow channel 221 are connected in sequence, and the valve body 28 is disposed in the fourth channel 272.

[0091] Understandably, the third channel 271 is located on the bottom wall of the receiving cavity, making it easy to process and shape. The fourth channel 272 is located on the first end cap 27, which not only makes it easy to process and shape but also facilitates communication with the third channel 271, thus simplifying the internal structure of the filter element assembly 20. The third channel 271 connects the second channel 241 of the third filter element 24 and the fourth channel 272 on the first end cap 27. When the valve body 28 is unidirectionally open, the water flow can smoothly pass through the second filter element 23 and the third filter element 24 in sequence before flowing into the first flow channel 221 to flush the inlet end of the first filter element 22. In addition, the valve body 28 is located in the fourth channel 272 of the first end cap 27. During assembly, the valve body 28 can be installed first, and then the first end cap 27 can be installed in the receiving cavity, improving the convenience of installing the valve body 28 and the first end cap 27.

[0092] In one embodiment, the third channel 271 includes a plurality of first grooves 273 disposed on the bottom wall of the receiving cavity, and the end of the first end cap 27 away from the first filter element 22 is provided with a second groove 274 connecting the plurality of first grooves 273 and the fourth channel 272. When the water pressure in the second groove 274 is greater than the water pressure in the first flow channel 221, the valve body 28 unidirectionally guides the water path from the second groove 274 to the first flow channel 221.

[0093] Understandably, multiple first grooves 273 can be arranged radially along the bottom wall of the receiving cavity and the cylinder 10, with the opening of the second groove 274 facing the bottom wall of the receiving cavity to connect the fourth channel 272 and the multiple first grooves 273. The fourth channel 272 is located on the outer wall of the first end cap 27 and extends radially along the cylinder 10. The valve body 28 abuts and seals against the inner wall of the fourth channel 272 to ensure the stability of the unidirectional flow of the valve body 28.

[0094] Figure 8 This is a schematic diagram of water flow when the valve body is not open. Figure 9 This is a schematic diagram of water flow when the valve body is open. The water purification device includes a first faucet and a second faucet. The filter element assembly 20 is applied to the water purification device. The first outlet 212 is connected to the first faucet, and the second outlet 214 is connected to the second faucet. When the second faucet is open, the water pressure in the second channel 241 and the second groove 274 is lower than the water pressure in the first flow channel 221. At this time, the valve body 28 is closed, and the water flowing into the second channel 241 is filtered by the third filter element 24 and then flows out along the first channel 121 to the second outlet 214, that is, it flows out from the second faucet (e.g., as shown in the diagram). Figure 8 (Direction indicated by the medium-thick arrow).

[0095] When the second tap is closed, the water pressure in the first channel 121 and the second channel 241 increases, causing the water pressure in the second groove 274 to increase until the water pressure in the second groove 274 exceeds the water pressure in the first flow channel 221. At this point, the unidirectional valve body 28 opens, and the water flowing into the second chamber 215 flows sequentially through the second channel 241, the first groove 273, the second groove 274, the fourth channel 272, and the valve body 28 before flowing into the first flow channel 221, thereby rinsing the inlet end of the first filter element 22 (e.g., ...). Figure 9 (Direction indicated by the medium-thick arrow).

[0096] Please see Figures 4 to 6 In one embodiment, the first filter element 22 has a hollow structure, forming a hollow cavity 222 in the first chamber 111. The first outlet 212 communicates with the hollow cavity 222 through a second end cap 29 disposed at one end of the first filter element 22. The filter element assembly 20 also includes a fourth filter element 25 disposed in the hollow cavity 222. The second end cap 29 is provided with a first interceptor 31 for intercepting the fourth filter element 25 from flowing outward. The first interceptor 31 is disposed in the first chamber 111.

[0097] It is understood that the first filter element 22 can be made of PP cotton, which can be rolled up and has a hollow internal structure. In other embodiments, the first filter element 22 can also be made of PP cotton and carbon fiber rolled together. The specifics are not limited here, as long as it meets the requirement of being a pre-filter element.

[0098] Furthermore, the second end cap 29 can be used to limit and fix the end of the first filter element 22 near the first outlet 212. The second end cap 29 is provided with an installation groove, and the end of the first filter element 22 near the first outlet 212 is installed in the installation groove to achieve quick positioning and installation of the first filter element 22 and ensure the stability of the first filter element 22 installed in the first chamber 111.

[0099] Furthermore, the second end cap 29 is hollow and inserted into the mounting port 112 of the cylinder 10 to connect the first outlet 212 and the hollow cavity 222 of the first filter element 22. The filter element assembly 20 also includes a fourth filter element 25, which can be made of granular activated carbon. When the granular activated carbon is placed in the hollow cavity 222, it can effectively filter chloroform in the water to ensure that the chloroform content of the filtered water fully meets the national standard, that is, to ensure that the removal rate of chloroform in the water filtered by the first filter element 22 and the fourth filter element 25 meets the national standard, thereby improving the filtration effect of the filter element assembly 20.

[0100] In addition, the second end cap 29 is also provided with a first interceptor 31 to intercept the granular activated carbon flowing out of the first outlet 212. The first interceptor 31 can be arranged in a mesh shape to intercept the granular fourth filter element 25. The first interceptor 31 is located in the first chamber 111, specifically in the hollow channel of the second end cap 29, thus making full use of the internal space of the second end cap 29 and improving the utilization rate of the internal space of the second end cap 29.

[0101] In this embodiment, the second end cap 29 is hollow, forming a hollow channel. The hollow channel includes a first sub-channel 291 and a second sub-channel 292 that are interconnected. The hollow cavity 222, the first sub-channel 291, the second sub-channel 292, and the first outlet 212 are sequentially connected. The opening width of the first sub-channel 291 is greater than the opening width of the second sub-channel 292. The first interceptor 31 is disposed within the first sub-channel 291, and the radial width of the first interceptor 31 along the cylinder 10 is greater than the opening width of the second sub-channel 292. This arrangement ensures that the first interceptor 31 is confined within the first sub-channel 291, completely intercepting the fourth filter element 25 in the hollow cavity 222 to prevent the fourth filter element 25 from flowing into the first outlet 212 along the second sub-channel 292, thereby improving the reliability of the filter element assembly 20.

[0102] In one embodiment, the outer casing 21 includes a casing body 216 and a casing cover 217. The casing cover 217 is detachably mounted on the casing body 216. One end of the casing cover 217 has an opening, at which a filter element interface 218 is provided. The filter element interface 218 is provided with a first inlet 211, a first outlet 212, a second inlet 213, and a second outlet 214 communicating with the receiving cavity. The first inlet 211 and the first outlet 212 communicate with the first chamber 111, and the second inlet 213, the second chamber 215, the first channel 121, and the second outlet 214 are sequentially connected. Furthermore, a first filter element 22 is disposed in the first chamber 111, and a second filter element 23 is disposed in the second chamber 215. This configuration ensures that the first inlet 211, the first outlet 212, the second inlet 213, and the second outlet 214 are located at the same end of the outer casing 21. When water flows into the first chamber 111 from the first inlet 211 and is filtered by the first filter element 22, the filtered water can flow out from the first outlet 212. When water flows into the second chamber 215 from the second inlet 213 and is filtered by the second filter element 23, it can flow into the first channel 121 and then flow out from the second outlet 214. The first chamber 111 and the first channel 121 are separated, and the first chamber 111 and the second chamber 215 are independent of each other, and their respective internal filtration processes do not affect each other, thus ensuring the reliability of the filter element assembly 20.

[0103] Please see Figures 4 to 6 When the second filter element 23 is made of granular activated carbon, the granular activated carbon fills the second chamber 215. The lower end of the second chamber 215 is blocked by the third filter element 24, thereby limiting the granular activated carbon. The upper end of the second chamber 215 also needs to limit the granular activated carbon. Therefore, in one embodiment, the filter element assembly 20 also includes a second interceptor 32 disposed in the second chamber 215. The second interceptor 32 is annular and disposed between the second filter element 23 and the second inlet 213 to block the granular activated carbon in the second filter element 23 and prevent the granular activated carbon from entering the second inlet 213. The adapter end cap 26 is provided with an annularly arranged protrusion. The second interceptor 32 abuts and is supported on the protrusion of the adapter end cap 26. The inner sidewall of the second interceptor 32 abuts against the outer wall of the adapter end cap 26, and the outer sidewall of the second interceptor 32 abuts against the inner wall of the outer shell 21. The second interceptor 32 has multiple openings that extend axially along the outer casing 21 and are circumferentially distributed around the axis. Furthermore, a filter screen can be provided at the opening to block smaller particles of activated carbon from passing through.

[0104] Please see Figure 5 and Figure 12 , Figure 12 The filter element assembly and Figure 5 Compared to the filter components in the middle, Figure 12 The filter assembly in the middle does not have a first interceptor, that is Figure 12 The filter cartridge assembly in the middle does not require a fourth filter element.

[0105] Please see Figure 5 and Figure 13 , Figure 13 The filter element assembly and Figure 5 Compared to the filter components in the middle, Figure 13 The filter element assembly in the middle does not have a one-way valve.

[0106] Please see Figure 5 and Figure 14 , Figure 14 The filter element assembly and Figure 5 Compared to the filter components in the middle, Figure 14 The filter element assembly in this application lacks a first interceptor and a one-way valve body. Therefore, the internal structure of the filter element assembly can be configured in various ways, and can be tailored to specific needs.

[0107] The present invention also proposes a water purification device, which includes a body and a filter element assembly 20 as described above. The filter element assembly 20 is disposed in the body. The specific structure of the filter element assembly 20 is as described in the above embodiments. Since the filter element assembly 20 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.

[0108] 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 casing has a receiving cavity and a first water inlet, a first water outlet, a second water inlet, and a second water outlet communicating with the receiving cavity; A cylindrical body is disposed within the receiving cavity. The cylindrical body includes a cylindrical body and a liquid-passing section. The cylindrical body has a first chamber and an installation port and a liquid-passing port communicating with the first chamber. The liquid-passing section is disposed on the outer wall of the cylindrical body and forms a first channel that is separated from the first chamber. A second chamber is formed between the outer wall of the cylindrical body and the inner wall of the outer shell. The second chamber communicates with the first channel of the cylindrical body. The first water inlet and the first water outlet communicate with the first chamber. The second water inlet communicates with one of the second chamber and the first channel. The second water outlet communicates with the other of the second chamber and the first channel. A first filter element is disposed within the first chamber; as well as The second filter element is disposed in the second chamber; The third filter element is sleeved outside the cylinder and located at the end of the liquid passage section away from the second water inlet. The third filter element has a second channel, which connects the second chamber and the first channel. A first end cap is disposed in the first chamber and seals the end of the first filter element away from the first outlet. A first flow channel is formed between the first end cap and the inner wall of the cylinder. The first end cap and the outer shell cooperate to form a liquid passage connecting the second channel and the first flow channel. A valve body is provided in the liquid passage for unidirectional flow from the second channel to the first flow channel.

2. The filter element assembly as described in claim 1, characterized in that, The third filter element is located at the end of the liquid passage section away from the first water inlet, and part of the third filter element extends into the liquid passage section and abuts and seals against the liquid passage section.

3. The filter element assembly as described in claim 1, characterized in that, The filter element assembly also includes an adapter end cap located at one end of the cylinder near the first water inlet and the second water inlet. Part of the liquid passage section and the cylinder body extend into the adapter end cap. The cylinder body is sealed to the adapter end cap by a sealing ring located outside the liquid passage section.

4. The filter element assembly as described in claim 3, characterized in that, The liquid-passing part extending into the adapter end cap and the outer wall of the cylinder body are provided with annular protrusions, and the annular protrusions are provided with annular grooves for holding the sealing ring.

5. The filter element assembly as described 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 first end cap. 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.

6. The filter element assembly as described in claim 5, characterized in that, The third channel includes a plurality of first grooves on the bottom wall of the receiving cavity. The end of the first end cap away from the first filter element is provided with a second groove that connects the plurality of first grooves and the fourth channel. When the water pressure in the second groove is greater than the water pressure in the first flow channel, the valve body unidirectionally guides the water path from the second groove to the first flow channel.

7. The filter element assembly as claimed in claim 1, characterized in that, The first filter element has a hollow structure, forming a hollow cavity in the first chamber. The first outlet communicates with the hollow cavity through a second end cap located at one end of the first filter element. The filter element assembly also includes a fourth filter element located in the hollow cavity. The second end cap is provided with a first interceptor for intercepting the fourth filter element from flowing outward. The first interceptor is located in the first chamber.

8. The filter element assembly as claimed in claim 1, characterized in that, The mounting port and the liquid passage port are located at opposite ends of the cylinder body; the liquid passage section is integrally formed with the cylinder body.

9. The filter element assembly as claimed in claim 1, characterized in that, The liquid-passing section is located on the outer wall of the cylinder; the first channel is formed inside the liquid-passing section; Alternatively, the liquid-passing section may be enclosed by the outer wall of the cylinder to form the first channel.

10. The filter element assembly as claimed in claim 1, characterized in that, The first channel extends along the axial direction of the cylinder; And / or, along the axial direction of the cylinder, the depth of the first chamber is greater than the length of the first channel; And / or, in the axial section of the cylinder, the cross-sectional area of ​​the first chamber is greater than the cross-sectional area of ​​the first channel.

11. The filter element assembly according to any one of claims 1 to 10, characterized in that, The liquid-passing section includes a liquid-passing pipe section and a liquid-passing ring section connected to each other. The liquid-passing ring section is sleeved on the cylinder body, and the liquid-passing pipe section is located on one side of the cylinder body and communicates with the liquid-passing ring section.

12. The filter element assembly as claimed in claim 11, characterized in that, The inner diameter of the first chamber is larger than the inner diameter of the liquid passage section; And / or, the opening width between the liquid-passing ring section and the cylinder body is greater than or equal to the inner diameter of the liquid-passing pipe section; And / or, the maximum inner diameter of the liquid passage section is D1, wherein D1 satisfies: 8mm≤D1≤16mm.

13. The filter element assembly as claimed in claim 11, characterized in that, The cylinder also includes an annular boss, which is provided on the outer wall of the liquid passage section and the cylinder body, and an annular groove is provided on the outer peripheral wall of the annular boss.

14. 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 13, wherein the filter element assembly is disposed within the body.

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