Filtering device

Abstract

The filtering device comprises a mounting base and a filter element assembly, the filter element assembly comprises a filter cartridge and a filter element arranged in the filter cartridge, an external water path is formed between the outer side of the filter element and the filter cartridge, an internal water path is formed in the inner side of the filter element, and the mounting base is provided with a first water path corresponding to the external water path and a second water path corresponding to the internal water path; the filter element assembly further comprises an outer plugging piece and an inner plugging piece; a sealing surface is formed in one end, butted with the mounting seat, of the filter cartridge, and a pushing part is formed on the mounting seat; in the dismounting state, the outer plugging piece makes contact with the sealing face, plugging of the outer water way is achieved, a channel of the inner plugging piece is closed, and plugging of the inner water way is achieved. In the installation state, under pushing of the pushing piece, the outer blocking piece is separated from the sealing face, the outer water way is communicated with the first water way, a channel of the inner blocking piece is opened, and the inner water way is communicated with the second water way. The problem of water leakage of the filter element when the filter element of the filter device is detached from the mounting seat is effectively solved.

Description

Technical Field

[0001] The present application relates to the technical field of water purification equipment, and in particular to a filtering device. Background Art

[0002] With economic development and rising living standards, consumers are paying more and more attention to healthy water use and drinking water, and their requirements for water usage are becoming increasingly higher. Water purifiers, as devices that can filter and purify raw water such as tap water, are gaining recognition and favor among more and more consumers.

[0003] There are many types of water purifiers on the market, with different structures, but most are equipped with replaceable filter devices. The filter device includes a mounting base and a filter cartridge. The mounting base is installed on the water channel structure of the water purifier. The filter cartridge is a consumable material that is detachably installed on the mounting base. The mounting base has a raw water channel and a clean water channel. Raw water passes through the raw water channel and enters the filter cartridge, which is filtered into clean water before being discharged through the clean water channel. When the filter cartridge needs to be replaced, the filter cartridge originally installed on the mounting base needs to be removed. When the filter cartridge is removed, the water channel of the filter cartridge and the water channel on the mounting base become separated from the original sealed state. This causes the unemptied water in the filter cartridge to leak out from the opening of the filter cartridge, affecting the user experience. Utility Model Content

[0004] The present application provides a filtering device to improve or solve, to a certain extent, the technical problem of water leakage in the existing filtering device when the filter element is removed from the mounting seat.

[0005] The technical solutions adopted in this application are:

[0006] A filter device, comprising a mounting seat and a filter element assembly detachably mounted on the mounting seat, the filter element assembly comprising a filter cartridge and a filter element disposed within the filter cartridge, an external waterway formed between the outer side of the filter element and the filter cartridge, an internal waterway formed within the filter element, the mounting seat being provided with a first waterway corresponding to the external waterway and a second waterway corresponding to the internal waterway;

[0007] The filter element assembly further includes an external blocking member provided on the external waterway and an internal blocking member provided on the internal waterway; a sealing surface is formed in one end of the filter cartridge for docking with the mounting seat, a push member is formed on the mounting seat, and the filter element assembly further includes an external reset member and an internal reset member;

[0008] In the disassembled state, the outer blocking member contacts the sealing surface under the action of the outer reset member to achieve blocking of the external waterway, and the inner blocking member closes the passage after the inner reset member is reset to achieve blocking of the internal waterway;

[0009] In the installed state, under the push of the pushing member, the outer sealing member is separated from the sealing surface, so that the external water channel is connected to the first water channel, and the passage of the inner sealing member is opened, so that the internal water channel is connected to the second water channel.

[0010] The filter device in this application also has the following additional technical features:

[0011] The outer sealing member and the sealing surface are both annular, and the outer sealing member and the sealing surface are coaxially arranged.

[0012] The filter cartridge is provided with a mounting joint for docking with the mounting seat, the sealing surface is formed on the inner surface of the mounting joint, the filter element is provided with a shaft tube inserted into the mounting joint, the inner sealing part is provided in the inner cavity of the shaft tube, and the outer sealing part is provided on the outer wall of the shaft tube.

[0013] It also includes an external reset member and an internal reset member; in the disassembled state, the external blocking member contacts the sealing surface under the action of the external reset member, and the internal blocking member closes the passage after the internal reset member is reset.

[0014] The external reset member is sleeved on the shaft tube; the external blocking member is sleeved on the shaft tube, and one end of the external reset member abuts against the external reset member to clamp and limit the external reset member; in the installed state, the pushing member pushes the external reset member to compress the external reset member.

[0015] The outer sealing member is integrally formed on the outer wall of the shaft tube, and the two ends of the outer reset member respectively press against the top of the filter element and the inner surface of the filter cartridge; in the installed state, the pushing member pushes the outer sealing member and drives the filter element to compress the outer reset member.

[0016] An annular limiting rib is provided on the top of the filter element, and a stop boss extending toward the annular limiting rib is provided on the inner surface of the filter cartridge. Both ends of the external reset member are respectively sleeved on the annular limiting rib and the stop boss.

[0017] A limiting step is provided at the bottom of the shaft tube, and the inner sealing member is placed on the limiting step. A limiting member is also provided in the shaft tube, and one end of the limiting member abuts against the inner sealing member to press the inner sealing member tightly against the limiting step.

[0018] The internal sealing member includes a valve housing, a valve core, and an internal return member disposed within the valve housing to abut the valve core. In the installed state, the valve core, pushed by the push member, compresses the internal return member to open the passageway of the internal sealing member. In the disassembled state, the valve core, under the action of the internal return member, closes the passageway of the internal sealing member. Preferably, the internal sealing member is configured as a check valve.

[0019] The mounting seat includes an inner ring rib and an outer ring rib surrounding the outside of the inner ring rib, the first water channel is formed between the inner ring rib and the outer ring rib, and the second water channel is formed inside the inner ring rib; a push rod is provided in the first water channel, and the inner ring rib and the push rod serve as the pushing member to push the outer sealing member and open the passage of the inner sealing member respectively.

[0020] It also includes a first seal, a second seal and a third seal; in the installed state, the first seal forms a seal on the outside of the outer ring rib, the second seal forms a seal on the inside of the inner ring rib, and the third seal forms a seal between the outer sealing member and the sealing surface.

[0021] Due to the adoption of the above technical solution, the technical effects achieved by this application are:

[0022] 1. The filtering device provided by the present application has an external blocking member provided in the external waterway and an internal blocking member provided in the internal waterway. When the filter element assembly is removed from the mounting seat, the internal blocking member blocks the internal waterway and the external blocking member blocks the external waterway. This allows even if some water in the filter element assembly is not emptied and accumulates in the external waterway or the internal waterway, it will be retained in the filter element assembly under the blocking effect of the external blocking member and the blocking effect of the internal blocking member, and will not leak out from the opening of the filter cartridge. This allows the filter element assembly to have a disassembly and leak-proof function, thereby improving the user experience. When the filter element assembly is installed on the mounting seat, the internal blocking member and the external blocking member change state under the pushing effect of the pushing member, respectively, so that the external waterway is connected to the first waterway and the second waterway is connected to the internal waterway, thereby realizing the connection between the filter element assembly and the mounting seat, thereby enabling the external raw water to pass through the mounting seat into the filter element assembly, be filtered into clean water, and then be discharged through the mounting seat, thereby realizing the filtering function.

[0023] 2. As a preferred embodiment of the present application, the outer sealing member changes its position when being pushed by the pushing member, so that the outer reset member is compressed. When the filter element assembly is removed from the mounting seat, the compression force on the outer reset member disappears, and the outer reset member recovers its deformation. In the process of recovering its deformation, the outer sealing member is quickly reset to the position of blocking the external waterway and contacts the sealing surface, so that the external waterway is quickly closed, the response speed is improved, and the external waterway is effectively prevented from leaking out when the filter element assembly is removed.

[0024] 3. As a preferred embodiment of the present application, the external reset member and the external blocking member are both sleeved on the shaft tube of the filter element, and the external blocking member is used to clamp and limit the external reset member. When the filter element assembly is installed on the mounting seat, the external blocking member moves relative to the filter element and compresses the external reset member under the pushing action of the pushing member. In this embodiment, the external blocking member is an independent component relative to the filter cartridge and the filter element. It is only elastically offset against the filter element by the external reset member, which has a simple structure and is easy to process. In a preferred embodiment, the inner side of the filter cartridge is provided with a stop rib extending toward the filter element. The stop rib and the filter element are stopped and limited. The direction in which the stop rib stops the filter element is opposite to the direction in which the pushing member pushes the external blocking member, preventing the external blocking member from being pushed by the pushing member to open the external waterway, thereby driving the filter element to move and change the relative position of the filter element and the mounting seat.

[0025] 4. As a preferred embodiment of the present application, one end of the external reset part is against the top of the filter element, and the other end of the external reset part is against the inner surface of the filter cartridge. The external sealing part is integrally formed on the outer wall of the filter element shaft tube, so that the external sealing part drives the filter element as a whole to change its position and compress the external reset part under the pushing action of the pushing part. In this embodiment, the external sealing part and the filter element can be regarded as one. When the external sealing part is pushed by the pushing part, the filter element as a whole moves and compresses the external reset part. When the filter element assembly is removed from the mounting seat, the external reset part resets the filter element as a whole and makes the external sealing part contact with the sealing surface to seal the external water channel. Under the action of the filter element as a whole pressing the external sealing part, it helps to improve the sealing effect of the external sealing part on the external water channel and reduce the risk of water leakage.

[0026] 5. As a preferred embodiment of the present application, the internal sealing member is configured as a check valve. When the filter element assembly is installed on the mounting seat, the push member pushes the valve core to move and the check valve is opened, so that the check valve connects the second water channel and the internal water channel. When the filter element assembly is removed from the mounting seat, the internal reset member recovers its deformation from the state originally compressed by the valve core and resets the valve core, so that the check valve is in a closed state, so that the check valve quickly blocks the internal water channel and reduces the risk of water leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0028] Figure 1 An exploded view of the filtering device provided in the first embodiment of the present application;

[0029] Figure 2 A cross-sectional view of a filtering device provided in the first embodiment of the present application;

[0030] Figure 3 for Figure 2 A partial enlarged view of the structure at point A in the middle;

[0031] Figure 4 A partial cross-sectional view of a filtering device provided in the first embodiment of the present application;

[0032] Figure 5 An exploded view of a filtering device provided in a second embodiment of the present application;

[0033] Figure 6 A cross-sectional view of a filtering device provided in a second embodiment of the present application;

[0034] Figure 7 for Figure 6 A partial enlarged view of the structure at point B in the middle;

[0035] Figure 8 A partial cross-sectional view of a filtering device provided in a second embodiment of the present application;

[0036] Figure 9 This is a schematic diagram of the structure of the mounting base provided in this application.

[0037] List of parts and reference numerals:

[0038] 1 mounting seat, 11 first water channel, 12 second water channel, 13 inner ring rib, 14 outer ring rib, 15 push rod;

[0039] 2 filter cartridge, 21 stop rib, 22 stop boss, 23 mounting joint, 24 sealing surface;

[0040] 3 filter element, 31 filter core body, 32 upper end cover, 321 annular limiting rib, 33 lower end cover, 331 shaft tube, 332 limiting step;

[0041] 4 external waterways;

[0042] 5 internal waterways;

[0043] 6 external sealing parts;

[0044] 7 internal blocking member, 71 valve housing, 72 valve core, 73 internal reset member;

[0045] 8 external reset parts;

[0046] 9 limiter;

[0047] 100 first seal;

[0048] 200 second sealing member;

[0049] 300 Third seal. DETAILED DESCRIPTION

[0050] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0051] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0052] In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", "lateral", "longitudinal", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0054] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0055] In the embodiments of this application, a filtering device is provided. For ease of explanation and understanding, the following content provided in this application is based on the illustrated product structure. Of course, those skilled in the art will understand that the above structure is only a specific example and schematic illustration and does not constitute a specific limitation of the technical solution provided in this application.

[0056] Reference Figures 1 to 9As shown, a filtering device provided in the present application includes a mounting seat 1 and a filter element assembly detachably mounted on the mounting seat 1, the filter element assembly includes a filter cartridge 2 and a filter element 3 arranged in the filter cartridge 2, an external waterway 4 is formed between the outer side of the filter element 3 and the filter cartridge 2, and an internal waterway 5 is formed on the inner side of the filter element 3, the mounting seat 1 is provided with a first waterway 11 corresponding to the external waterway 4 and a second waterway 12 corresponding to the internal waterway 5, the filter element assembly also includes an external sealing part 6 arranged in the external waterway 4 and an internal sealing part 7 arranged in the internal waterway 5; a sealing surface 24 is formed in one end of the filter cartridge 2 for docking with the mounting seat 1, and a push piece is formed on the mounting seat 1.

[0057] When the filter element assembly is removed from the mounting seat 1 , the outer blocking member 6 contacts the sealing surface 24 to block the external waterway 4 , and the passage of the inner blocking member 7 is closed to block the internal waterway 5 .

[0058] When the filter element assembly is installed on the mounting seat 1, under the push of the pushing member, the outer sealing member 6 is separated from the sealing surface 24, so that the external water channel 4 is connected to the first water channel 11, and the passage of the inner sealing member 7 is opened, so that the internal water channel 5 is connected to the second water channel 12.

[0059] Specifically, the external water channel 4 and the internal water channel 5 are separated by the filter element 3. One of the external water channel 4 and the internal water channel 5 is used to take in raw water, and the other is used to discharge the purified water produced by the filtration of the filter element 3. For example, when the external water channel 4 is used to take in raw water and the internal water channel 5 is used to discharge purified water, the first water channel 11 corresponding to the external water channel 4 is used to guide the raw water to the external water channel 4, and the second water channel 12 corresponding to the internal water channel 5 is used to guide the purified water produced by the filtration of the filter element 3 to the downstream water channel component connected to the second water channel 12; for another example, when the internal water channel 5 is used to take in raw water and the external water channel 4 is used to discharge purified water, the second water channel 12 corresponding to the internal water channel 5 is used to guide the raw water to the internal water channel 5, and the first water channel 11 corresponding to the external water channel 4 is used to guide the purified water produced by the filtration of the filter element 3 to the downstream water channel component connected to the first water channel 11.

[0060] like Figure 2 and Figure 3 As shown, the filter element assembly and the mounting seat 1 are about to be separated (it can also be regarded as the state when the filter element assembly is not installed in place with the mounting seat). At this time, the outer blocking member 6 blocks the external waterway 4, and the inner blocking member 7 blocks the internal waterway 5. Figure 4The figure shows the state when the filter element assembly and the mounting base 1 are installed in place. At this time, the outer sealing member 6 opens the external waterway 4, and the inner sealing member 7 opens the internal waterway 5. In the filtering device provided by the present application, an outer sealing member 6 is provided in the external waterway 4, and an inner sealing member 7 is provided in the internal waterway 5. When the filter element assembly is removed from the mounting base 1, the inner sealing member 7 blocks the internal waterway 5, and the outer sealing member 6 blocks the external waterway 4. Even if some water in the filter element assembly is not emptied and accumulates in the external waterway 4 or the internal waterway 5, it will be retained in the filter element assembly under the blocking effect of the outer sealing member 6 and the inner sealing member 7, and will not leak out from the opening of the filter cartridge 2. This makes the filter element assembly have a disassembly anti-leakage function, improving the user experience.

[0061] When the filter element assembly is installed on the mounting base 1, the inner sealing member 7 and the outer sealing member 6 change their states respectively under the pushing action of the pushing member, so that the external waterway 4 is connected to the first waterway 11 and the second waterway 12 is connected to the internal waterway 5, thereby realizing the connection between the filter element assembly and the mounting base 1. In addition, external raw water can enter the filter element assembly through the mounting base 1, be filtered into clean water, and then be discharged through the mounting base 1, thereby realizing the filtering function. To reduce the risk of water leakage when the filter element assembly is removed, the outer sealing member 6 can be set at the opening position of the external waterway 4, and the inner sealing member 7 can be set at the opening position of the internal waterway 5. When the filter element assembly is removed from the mounting base 1, the outer sealing member 6 directly blocks the opening of the external waterway 4, and the inner sealing member 7 directly blocks the opening of the internal waterway 5.

[0062] As a preferred embodiment of the present application, the outer sealing member 6 and the sealing surface 24 are both annular and are coaxially arranged with each other. The outer sealing member 6 and the sealing surface 24 are both annular, that is, the opening position of the external waterway 4 is annular. The annular design can increase water flow and improve filtration efficiency. At the same time, the outer sealing member 6 and the sealing surface 24 form a surface seal, which has a better sealing effect.

[0063] As a preferred embodiment of this application, Figures 1 to 3 as well as Figures 5 to 7 As shown, the filter cartridge 3 is provided with a mounting joint 23 for docking with the mounting base 1, and a sealing surface 24 is formed on the inner surface of the mounting joint 23. The filter element 3 is provided with a shaft tube 331 inserted into the mounting joint 23. Specifically, the filter element 3 includes a filter core 31 and an upper end cap 32 and a lower end cap 33 respectively mounted at the upper and lower ends of the filter core 31. The shaft tube 331 is specifically formed on the lower end cap 33. The inner sealing member 7 is disposed in the inner cavity of the shaft tube 331, and the outer sealing member 6 is disposed on the outer wall of the shaft tube 331. In a preferred embodiment, the sealing surface 24 is specifically a conical surface. When the outer sealing member 6 blocks the external waterway 4, the conical sealing surface 24 abuts against the outer sealing member 6 to form a stop for the outer sealing member 6, and then cooperates with the outer sealing member 6 to seal the opening of the external waterway 4.

[0064] As a preferred embodiment of the present application, Figures 1 to 4 As shown, the filter device further includes an external reset member 8. When the external blocking member 6 is pushed by the push member, the position is changed, so that the external reset member 8 is compressed. When the filter element assembly is removed from the mounting seat 1, the external reset member 8 resets the external blocking member 6 to the position of blocking the external waterway 4. It will be understood by those skilled in the art that when the external blocking member 6 is pushed by the push member, the position is changed, so that the external reset member 8 is compressed. When the filter element assembly is removed from the mounting seat 1, the compressive force on the external reset member 8 disappears, and the external reset member 8 recovers its deformation. In the process of recovering its deformation, the external blocking member 6 is quickly reset to the position of blocking the external waterway 4 and contacts the sealing surface 24, so that the external waterway 4 is quickly sealed, the response speed is improved, and the external waterway 4 is effectively prevented from leaking out when the filter element assembly is removed.

[0065] The present application does not specifically limit the location of the external restoration member 8 and the design of the external blocking member 6, which may adopt any one of the following embodiments:

[0066] Example 1: Figures 2 to 4 As shown, the external reset member 8 is sleeved on the shaft tube 331; the external sealing member 6 is also sleeved on the shaft tube 331, and one end thereof abuts against the external reset member 8 to clamp and limit the external reset member 8; the external sealing member 6 moves relative to the filter element 3 and compresses the external reset member 8 under the pushing action of the fixed push member. In this method, the external sealing member 6 is an independent component relative to the filter cartridge 2 and the filter element 3. The external sealing member 6 can move relative to the filter element 3 and the filter cartridge 2. It is only elastically abutted against the filter element 3 by the external reset member 8. The structure is simple and easy to process. When the filter element assembly is installed on the mounting seat 1, the external sealing member 6 opens the external waterway 4 and compresses the external reset member 8 under the pushing action of the push member. When the filter element assembly is removed from the mounting seat 1, the external reset member 8 quickly resets the external sealing member 6 to the position of blocking the external waterway 4.

[0067] Further, if Figure 1 and Figure 2 As shown, the inner side of the filter cartridge 2 is provided with a stop rib 21 extending toward the filter element 3. The stop rib 21 stops and limits the filter element 3. The direction in which the stop rib 21 stops the filter element 3 is opposite to the direction in which the pushing member pushes the outer blocking member 6. It will be understood by those skilled in the art that when the outer blocking member 6 is pushed by the pushing member to open the external waterway 4, it acts on the filter element 3 through the external reset member 8, causing the filter element 3 to also have a tendency to be pushed. Therefore, by making the stop rib 21 stop the filter element 3 in the opposite direction in which the pushing member pushes the outer blocking member 6, the outer blocking member 6 is prevented from being pushed by the pushing member to open the external waterway 4, thereby preventing the filter element 3 from moving together and changing the relative position of the filter element 3 and the mounting seat 1.

[0068] Example 2: Figures 5 to 8As shown, the two ends of the external reset member 8 respectively press against the top of the filter element 3 (upper end cover) and the inner surface of the filter cartridge 2; the external blocking member 6 is integrally formed on the outer wall of the shaft tube 331, so that the external blocking member 6 drives the filter element 3 to change its position as a whole under the pushing action of the pushing member and compresses the external reset member 8. Figure 6 and Figure 7 As shown, the filter element assembly and the mounting seat 1 are about to be separated (it can also be regarded as the state when the filter element assembly is not installed in place with the mounting seat). At this time, the outer blocking member 6 blocks the external waterway 4, and the inner blocking member 7 blocks the internal waterway 5. Figure 8 The figure shows the state when the filter element assembly and the mounting base 1 are in place. At this time, the outer sealing member 6 opens the external waterway 4, and the inner sealing member 7 opens the internal waterway 5. In this method, the outer sealing member 6 and the filter element 3 can be regarded as an integral whole. When the outer sealing portion 6 is pushed by the pushing member, the filter element 3 as a whole moves and compresses the outer reset member 8. When the filter element assembly is removed from the mounting base 1, the outer reset member 8 resets the filter element 3 as a whole, causing the outer sealing member 6 to contact the sealing portion 24, blocking the external waterway 4. With the filter element 3 as a whole pressing against the outer sealing member 6, the sealing effect of the outer sealing member 6 on the external waterway 4 is improved, reducing the risk of water leakage.

[0069] Furthermore, if Figure 5 and Figure 6 As shown, an annular limiting rib 321 is provided on the upper end cover 32 of the filter element 3, and a stop boss 22 is provided on the inner surface of the filter cartridge 2, extending toward the annular limiting rib 321. The two ends of the external reset member 8 are respectively mounted on the annular limiting rib 321 and the stop boss 22. When the filter element 3 as a whole changes position under the pushing action of the push member, it abuts against the stop boss 22 and is thus restricted. It will be understood by those skilled in the art that by mounting the external reset member 8 on the annular limiting rib 321, the annular limiting rib 321 acts as a radial limit for the external reset member 8, preventing the external reset member 8 from twisting or twisting in the direction away from the axis, which would affect the reset action of the filter element 3. The stop boss 22 can abut against the filter element 3 during the process of the filter element 3 being pushed and moved by the pushing member, thereby forming a stop limit for the filter element 3, preventing the filter element 3 from excessive movement and affecting the docking and connection with the mounting seat 1. Moreover, after the stop boss 22 stops the filter element 3, it and the mounting seat 1 clamp the filter element 3 at both ends of the filter element 3, so that the filter element 3 is positioned to ensure the stability of the filtering function.

[0070] As a preferred embodiment of the present application, Figure 3 、 Figure 4 、 Figure 7 and Figure 8As shown, the internal blocking member 7 is configured as a check valve, which includes a valve housing 71, a valve core 72, and an internal reset member 73 arranged between the valve housing 71 and the valve core 72; when the filter element assembly is installed on the mounting seat 1, the valve core 72 compresses the internal reset member 73 under the pushing action of the push member and conducts the second waterway 12 and the internal waterway 5; when the filter element assembly is removed from the mounting seat 1, the internal reset member 73 resets the valve core 72 to a position that blocks the internal waterway 5. The internal blocking member 7 uses a check valve, and a suitable type of check valve can be directly obtained from the market, which is low-cost and easy to install. In other embodiments, the internal blocking member 7 can also use a structural form different from the check valve, as long as it can realize the opening of the internal waterway 5 when the filter element assembly is installed on the mounting seat 1, and the closing of the internal waterway 5 when the filter element assembly is removed from the mounting seat 1.

[0071] As a preferred embodiment of the present application, Figure 1 、 Figure 3 、 Figure 5 and Figure 7 As shown, a limiting step 332 is provided at the bottom of the shaft tube 331, and the inner sealing member is placed on the limiting step 332. A limiting member 9 is also provided inside the shaft tube 331, and one end of the limiting member 9 abuts against the inner sealing member 7 to press the inner sealing member 7 against the limiting step 332. Taking the inner sealing member 7 as a check valve as an example, during installation, after the check valve is installed in the shaft tube 331, the limiting member 9 is placed into the shaft tube 331. The limiting member 9 is specifically a cylindrical structure. The two ends of the check valve abut against the limiting step 332 and the cylindrical limiting member 9, respectively, and are thus confined within the shaft tube 331.

[0072] Furthermore, if Figure 4 、 Figure 8 and Figure 9 As shown, the mounting seat 1 includes an inner ring rib 13 and an outer ring rib 14 surrounding the outside of the inner ring rib 13, a first waterway 11 is formed between the inner ring rib 13 and the outer ring rib 14, a second waterway 12 is formed inside the inner ring rib 13, and a push rod 15 is provided in the first waterway 11; the inner ring rib 13 and the push rod 15 serve as the aforementioned pushing members to push the outer sealing member 6 and open the passage of the inner sealing member 7 respectively.

[0073] When the mounting connector 23 is docked against the inner side of the outer ring rib 14, the shaft tube 331 is inserted into the inner ring rib 13. The inner sealing member 7 is pushed open by the push rod 15, and the outer sealing member 6 is repositioned under the push of the inner ring rib 13. When the filter element assembly is docked with the mounting base 1, the outer ring rib 14 surrounds the outer side of the mounting connector 23. The inner ring rib 13 enters between the shaft tube 331 and the filter cartridge 2, pushing against the outer sealing member 6. The shaft tube 331 enters the inner ring rib 13, and the push rod 15 pushes against the valve core 72 of the check valve, moving it.

[0074] Furthermore, if Figure 1 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 7 and Figure 8 As shown, the filtering device also includes a first seal 100, a second seal 200 and a third seal 300; wherein, when the mounting joint 23 is docked at the inner side of the outer ring rib 14, the first seal 100 forms a seal between the mounting joint 23 and the outer ring rib 14, and the second seal 200 forms a seal between the inner ring rib 13 and the shaft tube 331; when the filter element assembly is removed from the mounting seat 1, the third seal 300 forms a seal between the outer sealing member 6 and the mounting joint 23 and the shaft tube 331 respectively. The first seal 100 forms a seal between the inner side of the outer ring rib 14 and the outer side of the mounting joint 23 to prevent the filter device from leaking water outward through the gap between the outer ring rib 14 and the mounting joint 23; the second seal 200 forms a seal between the inner side of the inner ring rib 13 and the outer side of the shaft tube 331 to prevent the clean water and the raw water from intersecting and mixing; when the filter element assembly is removed from the mounting seat 1, the third seal 300 forms a seal between the outer sealing member 6 and the mounting joint 23 and the shaft tube 331 respectively, thereby improving the sealing effect of the outer sealing member 6 on the external waterway 4 and reducing the risk of water leakage. Specifically, with respect to the aforementioned embodiment 1, as shown in FIG. Figure 3 As shown, the third sealing member 300 can include a first sealing ring sleeved on the outer sealing member 6 and a second sealing ring sleeved on the outer side of the shaft tube 331, so that the first sealing ring forms a seal between the outer sealing member 6 and the mounting joint 23, and the second sealing ring forms a seal between the outer sealing member 6 and the shaft tube 331. For the above-mentioned embodiment 2, as shown in FIG. Figure 7 As shown, the third sealing member 300 may only include a sealing ring sleeved on the outer sealing member 6 , and the sealing ring forms a seal between the outer sealing member 6 and the mounting joint 23 .

[0075] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0076] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0077] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A filter device comprising a mounting seat and a filter element assembly detachably mounted on the mounting seat, the filter element assembly comprising a filter cartridge and a filter element disposed within the filter cartridge, an external waterway being formed between the outer side of the filter element and the filter cartridge, an internal waterway being formed within the filter element, the mounting seat being provided with a first waterway corresponding to the external waterway and a second waterway corresponding to the internal waterway, characterized in that: The filter element assembly further includes an external blocking member provided on the external waterway and an internal blocking member provided on the internal waterway; a sealing surface is formed in one end of the filter cartridge for docking with the mounting seat, a push member is formed on the mounting seat, and the filter element assembly further includes an external reset member and an internal reset member; In the disassembled state, the outer blocking member contacts the sealing surface under the action of the outer reset member to achieve blocking of the external waterway, and the inner blocking member closes the passage after the inner reset member is reset to achieve blocking of the internal waterway; In the installed state, under the push of the pushing member, the outer sealing member is separated from the sealing surface, so that the external water channel is connected to the first water channel, and the passage of the inner sealing member is opened, so that the internal water channel is connected to the second water channel.

2. The filtering device according to claim 1, characterized in that The outer sealing member and the sealing surface are both annular, and the outer sealing member and the sealing surface are coaxially arranged.

3. The filtering device according to claim 1, characterized in that The filter cartridge is provided with a mounting joint for docking with the mounting seat, the sealing surface is formed on the inner surface of the mounting joint, the filter element is provided with a shaft tube inserted into the mounting joint, the inner sealing part is provided in the inner cavity of the shaft tube, and the outer sealing part is provided on the outer wall of the shaft tube.

4. The filtering device according to claim 3, characterized in that The external reset member is sleeved on the shaft tube; the external blocking member is sleeved on the shaft tube, and one end of the external reset member abuts against the external reset member to clamp and limit the external reset member; in the installed state, the pushing member pushes the external reset member to compress the external reset member.

5. The filtering device according to claim 3, characterized in that The outer sealing member is integrally formed on the outer wall of the shaft tube, and the two ends of the outer reset member respectively press against the top of the filter element and the inner surface of the filter cartridge; in the installed state, the pushing member pushes the outer sealing member and drives the filter element to compress the outer reset member.

6. The filtering device according to claim 5, characterized in that An annular limiting rib is provided on the top of the filter element, and a stop boss extending toward the annular limiting rib is provided on the inner surface of the filter cartridge. Both ends of the external reset member are respectively sleeved on the annular limiting rib and the stop boss.

7. The filtering device according to claim 3, characterized in that A limiting step is provided at the bottom of the shaft tube, and the inner sealing member is placed on the limiting step. A limiting member is also provided in the shaft tube, and one end of the limiting member abuts against the inner sealing member to press the inner sealing member tightly against the limiting step.

8. The filtering device according to claim 7, characterized in that The internal sealing member includes a valve housing, a valve core and the internal return member arranged in the valve housing to push against the valve core; in the installed state, the valve core compresses the internal return member under the push of the push member to open the passage of the internal sealing member; in the disassembled state, the valve core closes the passage of the internal sealing member under the action of the internal return member.

9. The filtering device according to any one of claims 1 to 8, characterized in that: The mounting seat includes an inner ring rib and an outer ring rib surrounding the outside of the inner ring rib, the first water channel is formed between the inner ring rib and the outer ring rib, and the second water channel is formed inside the inner ring rib; a push rod is provided in the first water channel, and the inner ring rib and the push rod serve as the pushing member to push the outer sealing member and open the passage of the inner sealing member respectively.

10. The filtering device according to claim 9, characterized in that It also includes a first seal, a second seal and a third seal; in the installed state, the first seal forms a seal on the outside of the outer ring rib, the second seal forms a seal on the inside of the inner ring rib, and the third seal forms a seal between the outer sealing member and the sealing surface.

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