CN223299636U - A filtering device - Google Patents

Abstract

The application discloses a filtering device, which comprises a mounting seat and a filter element assembly, wherein the filter element assembly comprises a filter element and a filter element arranged in the filter element, an external waterway is formed between the outer side of the filter element and the filter element, an internal waterway is formed on the inner side of the filter element, the mounting seat is provided with a first waterway corresponding to the external waterway and a second waterway corresponding to the internal waterway, the filter element assembly also comprises an external plugging piece and an internal plugging piece, a sealing surface is formed at one end of the filter element, which is used for butt joint with the mounting seat, of the mounting seat, a pushing piece is formed on the mounting seat, the external plugging piece is in contact with the sealing surface in a disassembly state, the passage of the external waterway is closed, the internal plugging piece is separated from the sealing surface in a mounting state, the external waterway is communicated with the first waterway, and the passage of the internal plugging piece is opened, so that the internal waterway is communicated with the second waterway. The application effectively solves the problem that the filter element leaks when the filter element is detached from the mounting seat.

Description

Filtering device

Technical Field

The application relates to the technical field of water purifying equipment, in particular to a filtering device.

Background

Along with the promotion of economic development and living standard, consumers pay more and more attention to healthy water and drinking water, and the use requirement on water is also higher and higher. Water purifiers are becoming accepted and favored by many consumers as equipment capable of filtering and purifying raw water such as tap water.

The water purifier on the market is various, and the structure is various, but the filter equipment of interchangeable core is mostly configured with, and filter equipment includes mount pad and filter core, and the mount pad is installed on the waterway structure of water purifier, and the filter core is as a use consumptive material and detachably installs on the mount pad, and the mount pad is equipped with raw water waterway and water purification waterway raw water and gets into the filter core through raw water waterway and filter and pass through water purification waterway discharge after the water purification. When the core needs to be replaced, the filter element originally installed on the installation seat needs to be detached, and when the filter element is detached, the waterway of the filter element and the waterway on the installation seat are changed into a separated state from the originally-positioned sealing state, so that the water which is not emptied in the filter element leaks out from the opening position of the filter element, and the use experience is affected.

Disclosure of utility model

The application provides a filtering device, which aims to improve or solve the technical problem that the filter element leaks when the filter element is detached from a mounting seat in the existing filtering device to a certain extent.

The technical scheme adopted by the application is as follows:

The filter device comprises a mounting seat and a filter element assembly which is detachably arranged on the mounting seat, wherein the filter element assembly comprises a filter cartridge and a filter element which is arranged in the filter cartridge, an external waterway is formed between the outer side of the filter element and the filter cartridge, an internal waterway is formed on the inner side of the filter element, and the mounting seat is provided with a first waterway corresponding to the external waterway and a second waterway corresponding to the internal waterway;

The filter element assembly further comprises an outer plugging piece arranged on the outer waterway and an inner plugging piece arranged on the inner waterway, wherein the filter cylinder is used for being in butt joint with one end of the mounting seat and is internally provided with a sealing surface, the mounting seat is provided with a pushing piece, and the filter element assembly further comprises an outer resetting piece and an inner resetting piece;

In a disassembly state, the outer plugging piece is contacted with the sealing surface under the action of the outer resetting piece to plug the external waterway, and the inner plugging piece is closed in a passage after resetting the inner resetting piece to plug the internal waterway;

Under the installation state, under the promotion of pushing away the piece, outer shutoff piece with sealed face separation makes outside water route with first water route intercommunication, the passageway of interior shutoff piece is opened, makes inside water route with the second water route intercommunication.

The filtering device of the application has the following additional technical characteristics:

The outer plugging piece and the sealing surface are annular, and the outer plugging piece and the sealing surface are coaxially arranged.

The filter cartridge is provided with a mounting joint for butt joint of 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 plugging piece is arranged in the inner cavity of the shaft tube, and the outer plugging piece is arranged on the outer wall of the shaft tube.

The sealing device also comprises an outer reset piece and an inner reset piece, wherein in a disassembled state, the outer sealing piece is contacted with the sealing surface under the action of the outer reset piece, and the inner sealing piece is closed in a passage after the inner reset piece is reset.

The outer reset piece is sleeved on the shaft tube, the outer blocking piece is sleeved on the shaft tube, one end of the outer blocking piece abuts against the outer reset piece to clamp and limit the outer reset piece, and in the installation state, the pushing piece pushes the outer reset piece to compress the outer reset piece.

The outer plugging piece is integrally formed on the outer wall of the shaft tube, two ends of the outer resetting piece respectively prop against the top of the filter element and the inner surface of the filter cylinder, and in the installation state, the pushing piece pushes the outer plugging piece and drives the filter element to compress the outer resetting piece.

The top of filter core is equipped with annular spacing muscle, the internal surface of straining the jar is equipped with towards the backstop boss that annular spacing muscle extends, the both ends of outer return piece overlap respectively and locate annular spacing muscle with on the backstop boss.

The bottom of central siphon is provided with spacing step, interior shutoff piece is arranged in spacing step is last, still be provided with the locating part in the central siphon, the one end of locating part with interior shutoff piece supports the top in order to with interior shutoff piece compresses tightly on the spacing step.

The inner plugging piece comprises a valve shell, a valve core and an inner resetting piece arranged in the valve shell to prop against the valve core, wherein in an installation state, the valve core compresses the inner resetting piece under the pushing of the pushing piece so as to open a passage of the inner plugging piece, and in a disassembly state, the valve core closes the passage of the inner plugging piece under the action of the inner resetting piece. Preferably, the inner closure element is configured as a non-return valve.

The mounting seat comprises an inner ring rib and an outer ring rib surrounding the outer side of the inner ring rib, the first waterway is surrounded between the inner ring rib and the outer ring rib, the second waterway is formed inside the inner ring rib, a push rod is arranged in the first waterway, and the inner ring rib and the push rod serve as pushing pieces to push the outer plugging pieces and open passages of the inner plugging pieces respectively.

The sealing device further comprises a first sealing piece, a second sealing piece and a third sealing piece, wherein in the installation state, the first sealing piece forms a seal at the outer side of the outer ring rib, the second sealing piece forms a seal at the inner side of the inner ring rib, and the third sealing piece forms a seal between the outer plugging piece and the sealing surface.

By adopting the technical scheme, the application has the following technical effects:

1. According to the filtering device provided by the application, the outer plugging piece is arranged in the outer waterway, the inner plugging piece is arranged in the inner waterway, and when the filter element assembly is detached from the mounting seat, the inner plugging piece plugs the inner waterway, so that even if a part of water in the filter element assembly is still not emptied and accumulated in the outer waterway or the inner waterway, the water can be reserved in the filter element assembly under the plugging action of the outer plugging piece and the plugging action of the inner plugging piece, and cannot leak out from the opening of the filter element, the filter element assembly has the function of disassembling and preventing water leakage, and the use experience of a user is improved. When the filter element assembly is installed on the installation seat, the inner plugging piece and the outer plugging piece change state under the pushing action of the pushing piece respectively, so that the outer waterway is communicated with the first waterway and the second waterway is communicated with the inner waterway to realize the communication between the filter element assembly and the installation seat, and then the outer raw water can enter the filter element assembly through the installation seat to be filtered into purified water and then is discharged through the installation seat, and the filtering function is realized.

2. As a preferable mode of the application, when the outer plugging piece is pushed by the pushing piece, the position of the outer plugging piece is changed, so that the outer resetting piece is compressed, when the filter element assembly is detached from the mounting seat, the compression force applied to the outer resetting piece disappears, the outer resetting piece is deformed in a recovery manner, and in the recovery deformation process, the outer plugging piece is quickly reset to the position for plugging the outer waterway and is contacted with the sealing surface, so that the outer waterway is quickly sealed, the response speed is improved, and the outer waterway is effectively prevented from leaking outwards when the filter element assembly is detached.

3. As a preferable mode of the application, the outer reset piece and the outer blocking piece are both sleeved on the shaft tube of the filter element, the outer blocking piece is used for clamping and limiting the outer reset piece, when the filter element assembly is installed on the installation seat, the outer blocking piece moves relative to the filter element and compresses the outer reset piece under the pushing action of the pushing piece, in the mode, the outer blocking piece is an independent component relative to the filter element and the filter element, and is only elastically abutted against the filter element through the outer reset piece, so that the filter element assembly is simple in structure and convenient to process. In the preferred embodiment, the inside of the filter cylinder is provided with a stop convex rib extending towards the filter core, the stop convex rib and the stop limit filter core, the direction of the stop convex rib stopping the filter core is opposite to the direction of the pushing piece pushing the outer plugging piece, and when the outer plugging piece is pushed by the pushing piece to open an external waterway, the filter core is driven to move together so as to change the relative position of the filter core and the mounting seat.

4. As a preferable mode of the application, one end of the outer reset piece is propped against the top of the filter element, the other end of the outer reset piece is propped against the inner surface of the filter cylinder, the outer seal piece is integrally formed on the outer wall of the filter element shaft tube, and the outer seal piece drives the filter element to integrally change position under the pushing action of the pushing piece to compress the outer reset piece.

5. As a preferable mode of the application, the inner plugging piece is configured as a check valve, when the filter element assembly is arranged on the mounting seat, the pushing piece pushes the valve core to move to conduct the check valve, so that the check valve is used for communicating the second waterway with the internal waterway, and when the filter element assembly is detached from the mounting seat, the inner resetting piece is deformed from the state of being compressed by the valve core to reset the valve core, so that the check valve is in a closed state, the check valve is used for rapidly plugging the internal waterway, and the risk of water leakage is reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application. In the drawings:

FIG. 1 is an exploded view of a filter device according to a first embodiment of the present application;

FIG. 2 is a cross-sectional view of a filter device according to a first embodiment of the present application;

FIG. 3 is an enlarged view of a portion of the structure at A in FIG. 2;

FIG. 4 is a partial cross-sectional view of a filter device according to a first embodiment of the present application;

FIG. 5 is an exploded view of a filter device according to a second embodiment of the present application;

FIG. 6 is a cross-sectional view of a filter device according to a second embodiment of the present application;

FIG. 7 is an enlarged view of a portion of the structure at B in FIG. 6;

FIG. 8 is a partial cross-sectional view of a filter device according to a second embodiment of the present application;

fig. 9 is a schematic structural diagram of a mounting seat provided by the present application.

List of parts and reference numerals:

The water pump comprises a mounting seat 1, a first water channel 11, a second water channel 12, an inner ring rib 13, an outer ring rib 14 and a push rod 15;

The filter cylinder (2), the stop convex rib (21), the stop boss (22), the mounting joint (23) and the sealing surface (24);

The filter element 3, the filter element 31, the upper end cover 32, the annular limiting rib 321, the lower end cover 33, the axle tube 331 and the limiting step 332;

4, an external waterway;

5 an internal waterway;

6, an outer plugging piece;

7 inner plugging piece, 71 valve shell, 72 valve core, 73 inner resetting piece;

8, an outer resetting piece;

9, a limiting piece;

100 a first seal;

200 a second seal;

300 a third seal.

Detailed Description

In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways than those described herein, and therefore the scope of the present application is not limited to the specific embodiments disclosed below.

In addition, in the description of the present application, it should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", "transverse", "longitudinal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or in communication, directly connected, or indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In the embodiments of the present application, a filtering device is provided, and for convenience of explanation and understanding, the following description is provided based on the structure of the illustrated product. It will of course be appreciated by those skilled in the art that the above-described construction is provided as a specific example and illustrative only and is not intended to constitute a specific limitation on the scope of the application.

Referring to fig. 1 to 9, the filtering device provided by the application comprises a mounting seat 1 and a filter element assembly detachably mounted on the mounting seat 1, wherein the filter element assembly comprises a filter element 2 and a filter element 3 arranged in the filter element 2, an external waterway 4 is formed between the outer side of the filter element 3 and the filter element 2, 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 further comprises an external blocking piece 6 arranged on the external waterway 4 and an internal blocking piece 7 arranged on the internal waterway 5, a sealing surface 24 is formed in one end of the filter element 2, which is used for butt joint with the mounting seat 1, and a pushing piece is formed on the mounting seat 1.

When the filter element assembly is detached from the mounting seat 1, the outer plugging piece 6 is in contact with the sealing surface 24, so that the external waterway 4 is plugged, and the passage of the inner plugging piece 7 is closed, so that the internal waterway 5 is plugged.

When the filter element assembly is installed on the installation seat 1, under the pushing of the pushing piece, the outer plugging piece 6 is separated from the sealing surface 24, so that the outer waterway 4 is communicated with the first waterway 11, and the passage of the inner plugging piece 7 is opened, so that the inner waterway 5 is communicated with the second waterway 12.

Specifically, the external waterway 4 and the internal waterway 5 are partitioned by the filter element 3, one of the external waterway 4 and the internal waterway 5 is used for water inflow, and the other is used for water purification produced by filtration of the filter element 3. For example, when the external waterway 4 is used for water inflow and the internal waterway 5 is used for water outflow, the first waterway 11 corresponding to the external waterway 4 is used for guiding raw water to the external waterway 4, the second waterway 12 corresponding to the internal waterway 5 is used for guiding purified water filtered by the filter element 3 to a downstream waterway part communicated with the second waterway 12, and when the internal waterway 5 is used for raw water inflow and the external waterway 4 is used for water outflow, the second waterway 12 corresponding to the internal waterway 5 is used for guiding raw water to the internal waterway 5, and the first waterway 11 corresponding to the external waterway 4 is used for guiding purified water filtered by the filter element 3 to a downstream waterway part communicated with the first waterway 11.

As shown in fig. 2 and 3, the outer plugging member 6 plugs the outer waterway 4 and the inner plugging member 7 plugs the inner waterway 5 when the cartridge assembly is about to be detached from the mount 1 (which may also be considered as a state when the cartridge assembly is not mounted in place with the mount). As shown in fig. 4, the filter element assembly and the mounting seat 1 are mounted in place, and at this time, the outer plugging member 6 opens the outer waterway 4, and the inner plugging member 7 opens the inner waterway 5. According to the filtering device provided by the application, the outer plugging piece 6 is arranged in the outer waterway 4, the inner plugging piece 7 is arranged in the inner waterway 5, when the filter element assembly is detached from the mounting seat 1, the inner waterway 5 is plugged by the inner plugging piece 7, and the outer waterway 4 is plugged by the outer plugging piece 6, so that even if part of water in the filter element assembly is still not emptied and accumulated in the outer waterway 4 or the inner waterway 5, the water can be reserved in the filter element assembly under the plugging action of the outer plugging piece 6 and the plugging action of the inner plugging piece 7, and the water cannot leak from the opening of the filter element 2, so that the filter element assembly has the functions of disassembling and preventing water leakage, and the use experience of a user is improved.

When the filter element assembly is installed on the installation seat 1, the inner blocking piece 7 and the outer blocking piece 6 change states under the pushing action of the pushing pieces respectively, so that the outer waterway 4 is communicated with the first waterway 11 and the second waterway 12 is communicated with the inner waterway 5 to realize the communication between the filter element assembly and the installation seat 1, and then external raw water can enter the filter element assembly through the installation seat 1 to be filtered into purified water and then is discharged through the installation seat 1, and the filtering function is realized. In order to reduce the risk of leaking water when the filter element assembly is detached, the outer plugging piece 6 can be arranged at the opening position of the outer waterway 4, and the inner plugging piece 7 is arranged at the opening position of the inner waterway 5, so that when the filter element assembly is detached from the mounting seat 1, the outer plugging piece 6 directly plugs the opening of the outer waterway 4, and the inner plugging piece 7 directly plugs the opening of the inner waterway 5.

As a preferred embodiment of the present application, the outer seal 6 and the sealing surface 24 are both annular, and the outer seal 6 and the sealing surface 24 are coaxially disposed. The outer plugging piece 6 and the sealing surface 24 are annular, namely the opening position of the outer waterway 4 is annular, the water flow can be increased by the annular design, the filtering efficiency is improved, and meanwhile, the outer plugging piece 6 and the sealing surface 24 are in surface sealing, so that the sealing effect is better.

As a preferred embodiment of the present application, as shown in fig. 1 to 3 and 5 to 7, the filter cartridge 3 is provided with a mounting joint 23 for abutting against the mounting seat 1, a sealing surface 24 is formed on an inner surface of the mounting joint 23, the filter cartridge 3 is provided with a shaft tube 331 inserted into the mounting joint 23, specifically, the filter cartridge 3 includes a filter cartridge body 31 and upper and lower end caps 32 and 33 respectively mounted on upper and lower ends of the filter cartridge body 31, the shaft tube 331 is specifically formed on the lower end cap 33, an inner blocking member 7 is provided in an inner cavity of the shaft tube 331, and an outer blocking member 6 is provided on an outer wall of the shaft tube 331. In a preferred embodiment, the sealing surface 24 is a conical surface, and when the outer plugging member 6 plugs the outer waterway 4, the conical sealing surface 24 abuts against the outer plugging member 6 to form a stop limit for the outer plugging member 6, and is in sealing fit with the outer plugging member 6 to plug the opening of the outer waterway 4.

As a preferred embodiment of the present application, as shown in fig. 1 to 4, the filtering device further includes an outer restoring member 8, and the outer blocking member 6 changes its position when pushed by the pushing member, so that the outer restoring member 8 is compressed, and when the filter element assembly is detached from the mounting base 1, the outer restoring member 8 restores the outer blocking member 6 to a position blocking the external waterway 4. Those skilled in the art will appreciate that when the outer plugging member 6 is pushed by the pushing member, the position of the outer plugging member 6 is changed, so that the outer resetting member 8 is compressed, when the filter element assembly is detached from the mounting seat 1, the compression force applied to the outer resetting member 8 disappears, the outer resetting member 8 recovers deformation, and in the process of recovering deformation, the outer plugging member 6 is quickly reset to the position for plugging the outer waterway 4 and is contacted with the sealing surface 24, so that the outer waterway 4 is quickly sealed, the response speed is improved, and the outer waterway 4 is effectively prevented from leaking outwards when the filter element assembly is detached.

The present application is not particularly limited to the setting position of the outer restoring member 8 and the design form of the outer blocking member 6, and any one of the following embodiments may be adopted:

In the first embodiment, as shown in fig. 2 to 4, the outer reset piece 8 is sleeved on the shaft tube 331, the outer blocking piece 6 is also sleeved on the shaft tube 331, one end of the outer blocking piece abuts against the outer reset piece 8 to clamp and limit the outer reset piece 8, and the outer blocking piece 6 moves relative to the filter element 3 under the pushing action of the pushing piece and compresses the outer reset piece 8. In this way, the outer plugging piece 6 is an independent component relative to the filter cartridge 2 and the filter core 3, the outer plugging piece 6 can move relative to the filter core 3 and the filter cartridge 2, and is elastically abutted against the filter core 3 only through the outer resetting piece 8, so that the structure is simple, the processing is convenient, when the filter core assembly is mounted on the mounting seat 1, the outer plugging piece 6 opens the outer waterway 4 under the pushing action of the pushing piece and compresses the outer resetting piece 8, and when the filter core assembly is dismounted from the mounting seat 1, the outer resetting piece 8 rapidly resets the outer plugging piece 6 to a position for plugging the outer waterway 4.

Further, as shown in fig. 1 and 2, a stop rib 21 extending towards the filter element 3 is arranged on the inner side of the filter cartridge 2, the stop rib 21 stops limiting the filter element 3, and the direction of the stop rib 21 stopping the filter element 3 is opposite to the direction of pushing the pushing piece to push the outer sealing piece 6. As will be appreciated by those skilled in the art, when the outer plugging member 6 is pushed by the pushing member to open the external waterway 4, the outer plugging member 6 acts on the filter element 3 through the outer resetting member 8, so that the filter element 3 also has a pushing tendency, and therefore, by making the direction of the stop rib 21 stop the filter element 3 opposite to the direction of the pushing member pushing the outer plugging member 6, the outer plugging member 6 is prevented from being pushed by the pushing member to open the external waterway 4, and the filter element 3 is driven to move together to change the relative position of the filter element 3 and the mounting seat 1.

In the second embodiment, as shown in fig. 5 to 8, two ends of the outer reset piece 8 respectively abut against the top of the filter element 3 (upper end cover) and the inner surface of the filter cylinder 2, and the outer blocking piece 6 is integrally formed on the outer wall of the shaft tube 331, so that the outer blocking piece 6 drives the filter element 3 to integrally change position under the pushing action of the pushing piece, and the outer reset piece 8 is compressed. As shown in fig. 6 and 7, when the cartridge assembly is about to be detached from the mount 1 (which may also be regarded as a state when the cartridge assembly is not mounted in place with the mount), the outer water channel 4 is blocked by the outer blocking member 6, and the inner water channel 5 is blocked by the inner blocking member 7. As shown in fig. 8, the filter element assembly and the mounting seat 1 are mounted in place, and at this time, the outer plugging member 6 opens the outer waterway 4, and the inner plugging member 7 opens the inner waterway 5. In this way, the outer plugging piece 6 and the filter element 3 can be regarded as a whole, when the outer plugging part 6 is pushed by the pushing piece, the filter element 3 integrally moves to compress the outer resetting piece 8, when the filter element assembly is detached from the mounting seat 1, the outer resetting piece 8 integrally resets the filter element 3 to enable the outer plugging piece 6 to be in contact with the sealing part 24 to plug the outer waterway 4, and under the action of the outer plugging piece 6 integrally pressed by the filter element 3, the sealing effect of the outer plugging piece 6 on the outer waterway 4 is improved, and the water leakage risk is reduced.

Further, as shown in fig. 5 and 6, an annular limiting rib 321 is disposed on the upper end cover 32 of the filter element 3, a stop boss 22 extending towards the annular limiting rib 321 is disposed on the inner surface of the filter cartridge 2, and two ends of the outer reset member 8 are respectively sleeved on the annular limiting rib 321 and the stop boss 22. The whole filter element 3 is propped against the stop boss 22 to be limited when the position of the filter element is changed under the pushing action of the pushing piece. Those skilled in the art can understand that the outer resetting piece 8 is sleeved on the annular limiting rib 321, so that the annular limiting rib 321 plays a radial limiting role on the outer resetting piece 8, and the resetting effect on the filter element 3 is prevented from being influenced by torsion and distortion of the outer resetting piece 8 in the direction deviating from the axis. The backstop boss 22 can be in the filter core 3 by the in-process that the ejector part pushed the removal with filter core 3 offset and form the backstop spacing to filter core 3, prevent that filter core 3 from taking place excessive movement and influencing the butt joint intercommunication with mount pad 1, moreover, backstop boss 22 backstop filter core 3 after, it presss from both sides tight filter core 3 at the both ends of filter core 3 with mount pad 1, makes filter core 3 location, ensures that filtering capability is stable.

As a preferred embodiment of the present application, as shown in fig. 3, 4, 7 and 8, the inner blocking member 7 is configured as a check valve including a valve housing 71, a valve core 72 and an inner restoring member 73 disposed between the valve housing 71 and the valve core 72, when the cartridge assembly is mounted to the mounting base 1, the valve core 72 compresses the inner restoring member 73 and conducts the second waterway 12 and the inner waterway 5 by pushing of the pushing member, and when the cartridge assembly is removed from the mounting base 1, the inner restoring member 73 restores the valve core 72 to a position blocking the inner waterway 5. The inner plugging piece 7 adopts a check valve, so that the check valve with a proper model can be directly obtained from the market, the cost is low, and the installation is convenient. In other embodiments, the inner blocking member 7 may be configured differently from a check valve, so long as it can open the internal waterway 5 when the filter element assembly is mounted on the mounting seat 1 and close the internal waterway 5 when the filter element assembly is dismounted from the mounting seat 1.

As a preferred embodiment of the present application, as shown in fig. 1, 3, 5 and 7, a limiting step 332 is provided at the bottom of the shaft tube 331, an inner blocking member is disposed on the limiting step 332, a limiting member 9 is further disposed in the shaft tube 331, and one end of the limiting member 9 abuts against the inner blocking member 7 to press the inner blocking member 7 against the limiting step 332. Taking the inner plugging member 7 as a check valve as an example, when the check valve is installed in the shaft tube 331, the limiting member 9 is placed in the shaft tube 331, the limiting member 9 is specifically in a cylindrical structure, and two ends of the check valve respectively abut against the limiting step 332 and the cylindrical limiting member 9 to be limited in the shaft tube 331.

Further, as shown in fig. 4, 8 and 9, the mounting seat 1 comprises an inner ring rib 13 and an outer ring rib 14 surrounding the outer side of the inner ring rib 13, a first waterway 11 is enclosed between the inner ring rib 13 and the outer ring rib 14, a second waterway 12 is formed inside the inner ring rib 13, a push rod 15 is arranged in the first waterway 11, and the inner ring rib 13 and the push rod 15 are used as the pushing pieces to push the outer plugging piece 6 and open the passage of the inner plugging piece 7 respectively.

When the mounting joint 23 is butted inside the outer ring rib 14, the shaft tube 331 is inserted into the inner ring rib 13, the inner plugging member 7 opens the passage of the inner plugging member 7 under the pushing action of the push rod 15, and the outer plugging member 6 changes position under the pushing action of the inner ring rib 13. When the filter element assembly is in butt joint with the mounting seat 1, the outer ring rib 14 surrounds the outer side of the mounting joint 23, the inner ring rib 13 enters between the shaft tube 331 and the filter cylinder 2 to push the outer sealing piece 6, the shaft tube 331 enters the inner ring rib 13, and the push rod 15 pushes the valve core 72 of the check valve to move.

Further, as shown in fig. 1, 3, 4, 5, 7 and 8, the filter device further includes a first sealing member 100, a second sealing member 200 and a third sealing member 300, wherein when the mounting joint 23 is abutted inside the outer ring rib 14, the first sealing member 100 forms a seal between the mounting joint 23 and the outer ring rib 14, the second sealing member 200 forms a seal between the inner ring rib 13 and the shaft tube 331, and when the filter element assembly is detached from the mounting seat 1, the third sealing member 300 forms a seal between the outer blocking member 6 and the mounting joint 23 and the shaft tube 331, respectively. The first sealing member 100 forms a seal between the inner side of the outer ring rib 14 and the outer side of the installation joint 23 to prevent the filtering device from leaking out through the gap between the outer ring rib 14 and the installation joint 23, the second sealing member 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 water from being mixed, the third sealing member 300 forms a seal between the outer sealing member 6 and the installation joint 23 and the shaft tube 331 when the filter element assembly is detached from the installation seat 1, respectively, the sealing effect of the outer sealing member 6 on the external waterway 4 is improved, the risk of leaking is reduced, specifically, for the first embodiment, as shown in fig. 3, the third sealing member 300 can comprise 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 to form a seal between the outer sealing member 6 and the installation joint 23, and for the second embodiment, as shown in fig. 7, the third sealing member 300 can only comprise a sealing ring sleeved on the outer sealing member 6 and the outer sealing member 23 and the installation joint 23.

The application can be realized by adopting or referring to the prior art at the places which are not described in the application.

In this specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment mainly describes differences from other embodiments.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims (10)

1. The filter device comprises a mounting seat and a filter element assembly detachably mounted on the mounting seat, wherein the filter element assembly comprises a filter cartridge and a filter element arranged in the filter cartridge, an external waterway is formed between the outer side of the filter element and the filter cartridge, an internal waterway is formed on the inner side of the filter element, the mounting seat is provided with a first waterway corresponding to the external waterway and a second waterway corresponding to the internal waterway,

The filter element assembly further comprises an outer plugging piece arranged on the outer waterway and an inner plugging piece arranged on the inner waterway, wherein the filter cylinder is used for being in butt joint with one end of the mounting seat and is internally provided with a sealing surface, the mounting seat is provided with a pushing piece, and the filter element assembly further comprises an outer resetting piece and an inner resetting piece;

In a disassembly state, the outer plugging piece is contacted with the sealing surface under the action of the outer resetting piece to plug the external waterway, and the inner plugging piece is closed in a passage after resetting the inner resetting piece to plug the internal waterway;

Under the installation state, under the promotion of pushing away the piece, outer shutoff piece with sealed face separation makes outside water route with first water route intercommunication, the passageway of interior shutoff piece is opened, makes inside water route with the second water route intercommunication.

2. A filter device as claimed in claim 1, wherein,

The outer plugging piece and the sealing surface are annular, and the outer plugging piece and the sealing surface are coaxially arranged.

3. A filter device as claimed in claim 1, wherein,

The filter cartridge is provided with a mounting joint for butt joint of 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 plugging piece is arranged in the inner cavity of the shaft tube, and the outer plugging piece is arranged on the outer wall of the shaft tube.

4. A filter device according to claim 3, wherein,

The outer reset piece is sleeved on the shaft tube, the outer blocking piece is sleeved on the shaft tube, one end of the outer blocking piece abuts against the outer reset piece to clamp and limit the outer reset piece, and in the installation state, the pushing piece pushes the outer reset piece to compress the outer reset piece.

5. A filter device according to claim 3, wherein,

The outer plugging piece is integrally formed on the outer wall of the shaft tube, two ends of the outer resetting piece respectively prop against the top of the filter element and the inner surface of the filter cylinder, and in the installation state, the pushing piece pushes the outer plugging piece and drives the filter element to compress the outer resetting piece.

6. The filter device according to claim 5, wherein,

The top of filter core is equipped with annular spacing muscle, the internal surface of straining the jar is equipped with towards the backstop boss that annular spacing muscle extends, the both ends of outer return piece overlap respectively and locate annular spacing muscle with on the backstop boss.

7. A filter device according to claim 3, wherein,

The bottom of central siphon is provided with spacing step, interior shutoff piece is arranged in spacing step is last, still be provided with the locating part in the central siphon, the one end of locating part with interior shutoff piece supports the top in order to with interior shutoff piece compresses tightly on the spacing step.

8. The filter device of claim 7, wherein the filter device comprises a filter element,

The inner plugging piece comprises a valve shell, a valve core and an inner resetting piece arranged in the valve shell to prop against the valve core, wherein in an installation state, the valve core compresses the inner resetting piece under the pushing of the pushing piece so as to open a passage of the inner plugging piece, and in a disassembly state, the valve core closes the passage of the inner plugging piece under the action of the inner resetting piece.

9. A filter device according to any one of claims 1 to 8, wherein,

The mounting seat comprises an inner ring rib and an outer ring rib surrounding the outer side of the inner ring rib, the first waterway is surrounded between the inner ring rib and the outer ring rib, the second waterway is formed inside the inner ring rib, a push rod is arranged in the first waterway, and the inner ring rib and the push rod serve as pushing pieces to push the outer plugging pieces and open passages of the inner plugging pieces respectively.

10. The filter device of claim 9, wherein the filter device comprises a filter element,

The sealing device further comprises a first sealing piece, a second sealing piece and a third sealing piece, wherein in the installation state, the first sealing piece forms a seal at the outer side of the outer ring rib, the second sealing piece forms a seal at the inner side of the inner ring rib, and the third sealing piece forms a seal between the outer plugging piece and the sealing surface.