A filter cartridge assembly and a filtering device with automatic water cut-off

Abstract

The present invention discloses a filter cartridge assembly and a filtering device with automatic water cut-off. A filter cartridge assembly includes a filter cartridge housing, an inner cover provided at the upper end of the filter cartridge housing, and a filter element provided inside the filter cartridge housing; the inner cover is provided with a plurality of first channels for liquid inlet or outlet; the first channel is connected with a first water sealing rod; the first water sealing rod moves within the first channel to open or close the first channel. The filter cartridge assembly of the present invention and the valve head assembly have an automatic water cut-off function, enabling diverse installation directions and convenient disassembly and assembly; they also have a simple structure, sensitive water cut-off action, and good water cut-off sealing effect.

Description

Technical Field

[0001] The present invention relates to the technical field of filtering devices, and more specifically to a filter cartridge assembly and a filtering device with automatic water cut-off. Background Art

[0002] As is well known in the water purification industry, the filter element needs to be replaced in time when it reaches the service life. At present, quick-connect filter elements installed by 90-degree rotation are generally used in the market. The replacement methods of such filter elements are mainly divided into those without automatic water cut-off function and those with automatic water cut-off function. For the filter element without automatic water cut-off function, it is required that the water outlet of the filter element faces upward, and power and water need to be cut off during replacement, otherwise water leakage will occur when the filter element is taken out. For the filter element with automatic water cut-off function, end face sealing is generally adopted. When under the action of water pressure, the end face sealing is prone to failure. At the same time, the end face sealing has high requirements for dimensional accuracy, assembly accuracy, etc., with great technical difficulty and high cost. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a filter cartridge assembly and a filtering device with automatic water cut-off.

[0004] To achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A filter cartridge assembly includes a filter cartridge housing, an inner cover provided at the upper end of the filter cartridge housing, and a filter element provided inside the filter cartridge housing; the inner cover is provided with a plurality of first channels for liquid inlet or outlet; the first channels are connected with first water sealing rods; the first water sealing rods move within the first channels to open or close the first channels.

[0006] A further technical solution thereof is that: the inner cover is sealingly connected with the inner wall of the filter cartridge housing, and the inner cover and the filter cartridge housing have relative rotation.

[0007] A further technical solution thereof is that: a first elastic member is provided between the first water sealing rod and the first channel; the first elastic member is used to generate an elastic force on the first water sealing rod so that the first water sealing rod abuts against the first channel to form a seal of the first water sealing rod on the first channel.

[0008] A further technical solution thereof is that: a first sealing member is provided at the contact position between the first channel and the first water sealing rod.

[0009] A further technical solution thereof is that: the inner cover is fixed to the upper end of the filter cartridge housing through a provided pressing plate; the inner cover is provided with a plurality of mounting holes, and the pressing plate is provided with a plurality of first through holes corresponding to the mounting holes; the pressing plate and the mounting holes form the first channels.

[0010] Its further technical solution is as follows: A filtering chamber is formed in the gap between the outer wall of the filter element and the inner wall of the filter barrel housing; There are two first channels, one of the first channels is communicated with the inner cavity of the filter element, and the other first channel is communicated with the filtering chamber; The filter element is hermetically connected to the inner cover.

[0011] A filtering device with automatic water cut-off includes the above-mentioned filter barrel assembly and a valve head assembly detachably connected to the filter barrel assembly; The valve head assembly includes a valve housing and a second water sealing rod; The valve housing is provided with a plurality of second channels for water passage; The second water sealing rod moves in the second channel to open or close the first channel; After the filter barrel assembly and the valve head assembly are installed, the first channel and the second channel are communicated with each other; After the filter barrel assembly and the valve head assembly are disassembled, the first water sealing rod seals the first channel, and the second water sealing rod seals the second channel.

[0012] Its further technical solution is as follows: A second elastic member is provided between the second water sealing rod and the second channel; The elastic force of the second elastic member makes the second water sealing rod abut against the second channel to seal the second channel.

[0013] Its further technical solution is as follows: A second sealing member is provided at the connection between the second channel and the second water sealing rod.

[0014] Its further technical solution is as follows: The valve housing includes a mounting seat and a water circuit board fixedly connected to the mounting seat; A plurality of opening holes are provided at the upper end of the mounting seat; The water circuit board is provided with a plurality of second through holes corresponding to the opening holes; The water circuit board is arranged at one end of the opening hole so that the opening hole and the water circuit board form the second channel.

[0015] Its further technical solution is as follows: A convex portion is provided at the lower end of the mounting seat; When the filter barrel assembly and the valve head assembly are installed, the convex portion is used to abut against the first water sealing rod, and the convex portion is hermetically connected to the first sealing member provided in the first channel.

[0016] Its further technical solution is as follows: A connecting groove is provided at one end of the valve housing connected to the filter barrel assembly; An ear is provided on the outside of one end of the filter barrel housing connected to the valve head assembly; The ear is connected to the connecting groove.

[0017] Its further technical solution is as follows: The valve housing further includes a hanging bracket; The hanging bracket is provided with a through cavity, and the connecting groove is arranged on the inner wall of the through cavity; The mounting seat is fixedly connected to the hanging bracket, and the convex portion extends into the communicating cavity.

[0018] The beneficial effects of the present invention compared with the prior art are as follows: The filter cartridge assembly and the valve head assembly of the present invention are detachably connected. After the second water sealing rod is inserted into the first channel and positioned, then the filter cartridge housing is rotated to achieve the installation of the filter cartridge assembly and the valve head assembly, which is relatively convenient for installation. After the filter cartridge assembly and the valve head assembly are disassembled from each other, the first water sealing rod can automatically close the first channel to achieve automatic water cut-off of the filter cartridge assembly; the second water sealing rod can automatically close the second channel to achieve automatic water cut-off of the valve head assembly. The filter cartridge assembly and the valve head assembly of the present invention have an automatic water cut-off function, which makes the installation directions diverse and the disassembly and assembly convenient; it also has a simple structure, sensitive water cut-off action, and good water cut-off sealing effect.

[0019] The above description is only an overview of the technical solution of the present invention. In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present invention more obvious and understandable, the following preferred embodiments are specifically described in detail as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a front view of a filter cartridge assembly of the present invention;

[0021] Figure 2 is an exploded view of a filter cartridge assembly of the present invention;

[0022] Figure 3 is a cross-sectional view of a filter cartridge assembly of the present invention in a disassembled state;

[0023] Figure 4 is a cross-sectional view of a filter cartridge assembly of the present invention in an installed state;

[0024] Figure 5 is a front view of a filtering device with automatic water cut-off of the present invention;

[0025] Figure 6 is an exploded view of a filtering device with automatic water cut-off of the present invention;

[0026] Figure 7 is an exploded view of a filtering device with automatic water cut-off of the present invention from another perspective;

[0027] Figure 8 is a cross-sectional view of a filtering device with automatic water cut-off of the present invention in a disassembled state and a partial enlarged view;

[0028] Figure 9 is an exploded view of the filter cartridge assembly and the valve head assembly of a filtering device with automatic water cut-off of the present invention;

[0029] Figure 10 is a cross-sectional view of the filter cartridge assembly and the valve head assembly of a filtering device with automatic water cut-off of the present invention in a disassembled state;

[0030] Figure 11 This is a cross-sectional view of the installation state of a filtering device with automatic water cut-off according to the present invention. Detailed implementation manners

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0034] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more, unless otherwise specifically defined.

[0035] In the present invention, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0037] In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in this specification.

[0038] Drawings 1 to 11 are the drawings of the present invention.

[0039] This embodiment provides a filter cartridge assembly 10. Please refer to Figures 1 to 4 , which includes a filter cartridge housing 11, an inner cover 12 provided at the upper end of the filter cartridge housing 11, and a filter element 13 provided inside the filter cartridge housing 11. The inner cover 12 is provided with a plurality of first channels 121 for liquid inlet or outlet. A first water sealing rod 14 is connected to the first channel 121. The first water sealing rod 14 moves within the first channel 121 to open or close the first channel 121.

[0040] In this embodiment, the first water sealing rod 14 moves along the axial direction of the first channel 121. During the movement, the end face of the first water sealing rod 14 contacts one end of the first channel 121, so that the first water sealing rod 14 closes or opens the first channel 121. Preferably, the contact mode between the first water sealing rod 14 and the first channel 121 is surface contact, which improves the sealing effect.

[0041] The inner cover 12 is hermetically connected to the inner wall of the filter cartridge housing 11, and the inner cover 12 and the filter cartridge housing 11 have relative rotation. The inner cover 12 and the filter cartridge housing 11 rotate relative to each other and can maintain sealing during rotation, making it more convenient to connect both the inner cover 12 and the filter cartridge housing 11 to the valve head assembly 20.

[0042] Please refer to Figures 2 to 4, a first water sealing rod 14 and a first cavity 121 are provided with a first elastic member 15. The first elastic member 15 generates an elastic force on the first water sealing rod 14, so that the first water sealing rod 14 abuts against the first cavity 121, forming a seal of the first water sealing rod 14 on the first cavity 121. Specifically, in order for the first elastic member 15 to generate an elastic force on the first water sealing rod 14, the first elastic member 15 is a spring and is sleeved outside the first water sealing rod 14. The spring is in a compressed state, and the first water sealing rod 14 has an axial elastic force, so that the first water sealing rod 14 and the first cavity 121 can be sealed.

[0043] For better sealing performance, please refer to Figures 2 to 4 , a first sealing member 16 is provided at the contact portion between the first cavity 121 and the first water sealing rod 14. Preferably, the first sealing member 16 contacts the end of the first water sealing rod 14. After the first elastic member 15 generates an elastic force on the first water sealing rod 14, the first water sealing rod 14 can drive the first sealing member 16 to contact the first cavity 121 and can effectively seal, so that after disassembly, the water in the filter barrel housing 11 and the filter element 13 can be well sealed and will not leak during the disassembly process.

[0044] Specifically, one end of the first elastic member 15 abuts against the bottom of the first cavity 121, and one end is sleeved on the first water sealing rod 14. A raised edge is provided on the outer side of the first water sealing rod 14 to block the first elastic member 15, so that the elastic force can be transmitted to the first water sealing rod 14.

[0045] Please refer to Figures 2 to 4 , the inner cover 12 is fixed to the upper end of the filter barrel housing 11 through a pressing plate 17 provided. The inner cover 12 is provided with a plurality of mounting holes, and the pressing plate 17 is provided with a plurality of first through holes 171 corresponding to the mounting holes. The pressing plate 17 and the mounting holes form the first cavity 121.

[0046] Specifically, the mounting holes of the inner cover 12 are of an open design. After sequentially placing the first elastic member 15 and the first water sealing rod 14 into the mounting holes, the pressing plate 17 and the inner cover 12 are fixedly connected by screws. The diameter of the first through hole 171 on the pressing plate 17 is slightly smaller than that of the mounting hole, so that the pressing plate 17 can block the first water sealing rod 14, and the first water sealing rod 14 can also be squeezed from the first through hole 171, so that the first cavity 121 is opened.

[0047] A filtering cavity is formed in the gap between the outer wall of the filter element 13 and the inner wall of the filter barrel housing 11. Generally, there are two first channels 121. One of the first channels 121 communicates with the inner cavity of the filter element 13, and the other first channel 121 communicates with the filtering cavity to complete water inlet and outlet. The first channel 121 for water inlet communicates with the inner cavity of the filter element 13. After being filtered by the filter element 13, the water flows out from the first channel 121 communicating with the filtering cavity. The filter element 13 is hermetically connected to the inner cover 12, so that the inlet water can enter the inner cavity of the filter element 13 without leakage.

[0048] Among them, please refer to Figures 2 to 4 , for better installation and processing, the filter barrel housing 11 includes an upper housing 111 and a lower housing 112. The inner cover 12 is detachably connected to the upper housing 111 through a pressing plate 17. The upper housing 111 is provided with an installation cavity for accommodating the inner cover 12. However, a flange is provided at the position of the upper port of the installation cavity of the upper housing 111, so that the inner cover 12 will not fall out from the upper end when placed in the installation cavity; then the pressing plate 17 is fixedly connected to the inner cover 12, so that the inner cover 12 and the pressing plate 17 are connected to the upper housing 111 together. After the pressing plate 17 and the inner cover 12 are fixed, the filter element 13, the inner cover 12 and the pressing plate 17 form an integral body. Therefore, the filter barrel housing 11 can rotate relative to the filter element 13, the inner cover 12 and the pressing plate 17 to facilitate the installation of the filter barrel housing 11 and the valve head assembly 20.

[0049] The lower housing 112 and the upper housing 111 can be thread-sealed and connected, and a placement cavity for the filter element 13 and the inner cover 12 is formed. When replacing the filter element 13, the lower housing 112 and the upper housing 111 can be disassembled, and then the filter element 13 can be replaced.

[0050] For convenient installation, the upper housing 111 is provided with hanging ears 113

[0051] Specifically, a connecting pipe is provided on the side of the inner cover 12 facing the lower housing 112, and the connecting pipe communicates with the first channel 121 for water inlet. The filter element 13 is hermetically connected to the connecting pipe. The connecting pipe can also be a tubular protrusion.

[0052] Preferably, a handle 114 is provided at the lower end of the filter barrel housing 11 to facilitate rotational installation.

[0053] A filtering device with automatic water cut-off, please refer to Figure 4 、 5From 0 to 11, including the above-mentioned filter cartridge assembly 10 and the valve head assembly 20 detachably connected to the filter cartridge assembly 10. The valve head assembly 20 includes a valve housing 21 and a second water sealing rod 22. The valve housing 21 is provided with a plurality of second channels 23 for water passage. The second water sealing rod 22 moves in the second channel 23 to open or close the first channel 121. After the filter cartridge assembly 10 and the valve head assembly 20 are installed, the first water sealing rod 14 and the second water sealing rod 22 abut against each other or a part on the valve head assembly 20 presses to open the first channel 121, so that the first channel 121 communicates with the second channel 23. After the filter cartridge assembly 10 and the valve head assembly 20 are disassembled, the first water sealing rod 14 seals the first channel 121, and the second water sealing rod 22 seals the second channel 23.

[0054] Specifically, the first water sealing rod 14 is arranged in the first channel 121 and the first water sealing rod 14 moves axially along the first channel 121; when the first water sealing rod 14 moves to contact and seal with the first channel 121, the first channel 121 is in a closed state, and vice versa for the open state. The second water sealing rod 22 is arranged in the second channel 23 and the second water sealing rod 22 moves axially along the second channel 23; when the second water sealing rod 22 moves to contact and seal with the second channel 23, the second channel 23 is in a closed state, and vice versa for the open state.

[0055] Therefore, please refer to Figure 11 , after the filter cartridge assembly 10 and the valve head assembly 20 are installed, the first water sealing rod 14 and the second water sealing rod 22 are squeezed. In the drawing, the first water sealing rod 14 moves downward and the first channel 121 is opened; the second water sealing rod 22 moves upward and the second channel 23 is opened; moreover, the first channel 121 and the second channel 23 are arranged corresponding to each other, so that the first channel 121 and the second channel 23 are in communication with each other.

[0056] After the filter cartridge assembly 10 and the valve head assembly 20 are installed, the contact surfaces are sealed with each other, so that the connection between the two does not leak water.

[0057] A second elastic member 24 is provided between the second water sealing rod 22 and the second channel 23. The second elastic member 24 is in a compressed state. Therefore, the second elastic member 24 generates an elastic force on the second water sealing rod 22, so that the second water sealing rod 22 abuts against the second channel 23, and further the second water sealing rod 22 seals the second channel 23.

[0058] In order to make the sealing effect better, a second sealing member 25 is provided at the connection between the second channel 23 and the second water sealing rod 22. Preferably, the second sealing member 25 is sleeved outside the second water sealing rod 22. Under the action of the second elastic member 24, the second sealing member 25 is squeezed at the connection between the second water sealing rod 22 and the second channel 23, so that the sealing effect is better when closed.

[0059] Please refer toFigure 8 The second water sealing rod 22 is provided with a side hole 221 and a central hole 222. The side hole 221 and the central hole 222 communicate with each other. After the second water sealing rod 22 and the second channel 23 are opened, the outside and the inside of the valve head assembly 20 are communicated through the side hole 221 and the central hole 222, so that water enters the filter cartridge assembly 10 from the second channel 23 through the side hole 221 and the central hole 222. The design of the side hole 221 and the central hole 222 is to make the structure more compact and the water intake not affected by the second water sealing rod 22.

[0060] Specifically, the side hole 221 is close to the second seal 25, so that when the second water sealing rod 22 and the second channel 23 are slightly opened by a certain distance, water can flow into from the side hole 221 and then flow out from the central hole 222, without affecting the movement of the second water sealing rod 22 in the second channel 23.

[0061] Please refer to Figures 6 to 8 The valve housing 21 includes a mounting seat 26 and a water circuit board 27 fixedly connected to the mounting seat 26. The upper end of the mounting seat 26 is provided with a plurality of opening holes 261. The water circuit board 27 is provided with a plurality of second through holes 271 corresponding to the opening holes 261. The water circuit board 27 is arranged at one end of the opening hole 261, so that the opening hole 261, the water circuit board 27 and the second through hole 271 form the second channel 23. The second through hole 271 of the water circuit board 27 is connected to an external water pipe for water intake. The water circuit board 27 can act as a cover plate. After the second water sealing rod 22, the second elastic member 24 and the second seal 25 are installed into the opening hole 261, the water circuit board 27 is fixedly connected to the mounting seat 26, so that the second water sealing rod 22, the second elastic member 24 and the second seal 25 are installed into the second channel 23. One end of the second elastic member 24 abuts against the water circuit board 27, and the other end abuts against the second water sealing rod 22, so that the second water sealing rod 22 is sealed with the second channel 23. In the figure, the downward elastic force of the second elastic member 24 seals the second water sealing rod 22 and the second channel 23; when the second water sealing rod 22 is pushed upward, the second elastic member 24 is compressed by force, so the second water sealing rod 22 and the second channel 23 will be opened.

[0062] Please refer to Figures 6 to 8, a convex portion 262 is provided at the lower end of the mounting base 26. When the filter cartridge assembly 10 and the valve head assembly 20 are installed, the convex portion 262 is used to abut against the first water sealing rod 14. Specifically, during installation, the second water sealing rod 22 is first inserted into the first channel 121, and the first water sealing rod 14 and the second water sealing rod 22 abut against each other. However, since the first water sealing rod 14 has a certain displacement after the first elastic member 15 is compressed, and the second water sealing rod 22 has a certain displacement after the second elastic member 24 is compressed, during the stage where the first water sealing rod 14 and the second water sealing rod 22 abut against each other, they cannot be well positioned. Therefore, when the filter cartridge assembly 10 and the valve head assembly 20 are further installed, the convex portion 262 squeezes the first water sealing rod 14 so that the convex portion 262 is inserted into the first channel 121, thereby positioning the mounting base 26 and the inner cover 12, the first water sealing rod 14 and the second water sealing rod 22 abut against each other and the first channel 121 and the second channel 23 are completely communicated. Then, since the filter cartridge housing 11 and the inner cover 12 can rotate, it is convenient to connect the hanging bracket 28 and the filter cartridge housing 11.

[0063] Furthermore, the lower end of the second water sealing rod 22 extends into the convex portion 262 and extends out from the inner hole of the convex portion 262. It can be understood that the convex portion 262 is a part of the second channel 23, and the second water sealing rod 22 moves axially within the convex portion 262.

[0064] Please refer to Figure 8 、 11 , a more crucial function of the convex portion 262 is that when the convex portion 262 is inserted into the first channel 121, the convex portion 262 is connected to the first seal 16. The first seal 16 does not move after the first water sealing rod 14 moves, but the convex portion 262 forms a seal when inserted, so that the filter cartridge assembly 10 and the valve head assembly 20 have good sealing performance after installation.

[0065] One end of the valve housing 21 connected to the filter cartridge assembly 10 is provided with a connecting groove 211. An outer side of one end of the filter cartridge housing 11 connected to the valve head assembly 20 is provided with a hanging ear 113. The hanging ear 113 is connected to the connecting groove 211.

[0066] Preferably, the valve housing 21 further includes a hanging bracket 28. The hanging bracket 28 is provided with a through cavity, and the connecting groove 211 is provided on the inner wall of the through cavity. The mounting base 26 is fixedly connected to the hanging bracket 28, and the convex portion 262 extends into the communicating cavity.

[0067] The setting of the hanging bracket 28 is mainly to facilitate the disassembly and assembly with the filter cartridge assembly 10. The hanging ear 113 is arranged on the outer side of the upper housing 111 of the filter cartridge housing 11, and the number of the hanging ears 113 corresponds to that of the connecting grooves 211.

[0068] Please refer to Figure 8 、 11, when the filter cartridge assembly 10 and the valve head assembly 20 are installed, the upper housing 111 is inserted into the through cavity of the hanging bracket 28, the convex part 262 at the lower end of the mounting seat 26 is inserted into the first channel 121, and the first water sealing rod 14 is squeezed, and the first elastic member 15 is compressed to position the inner cover 12 and the mounting seat 26; then the filter cartridge housing 11 is rotated so that the hanging ear 113 is connected to the connection groove 211 on the hanging bracket 28. At this time, the first water sealing rod 14 and the second water sealing rod 22 abut against each other, and the second elastic member 24 is compressed so that the first channel 121 and the second channel 23 communicate with each other. The water in the water pipe connected to the valve head assembly 20 can enter the first channel 121 of the filter cartridge assembly 10 through the second channel 23 of the valve head assembly 20, and then enter the filter cartridge assembly 10 for filtration. At this time, the hanging ear 113 is buckled in the connection groove 211, and the convex part 262 is sealed with the first sealing member 16 to prevent water from leaking from the connection part of the first channel 121 and the second water sealing rod 22.

[0069] Please refer to Figure 8 , 10 , when the filter cartridge assembly 10 and the valve head assembly 20 are disassembled, the filter cartridge housing 11 is rotated to disengage the hanging ear 113 from the connection groove 211; when the filter cartridge assembly 10 and the valve head assembly 20 are separated, the second water sealing rod 22 and the convex part 262 are pulled out from the first channel 121, and the first water sealing rod 14 moves under the action of the first elastic member 15 so that the first water sealing rod 14 and the first sealing member 16 close the first channel 121 to achieve automatic water cut-off and prevent the filter cartridge assembly 10 from leaking water; at the same time, the second water sealing rod 22 moves under the action of the second elastic member 24, and the second channel 23 is closed under the movement of the second water sealing rod 22 to achieve automatic water cut-off and prevent the valve head assembly 20 from leaking water.

[0070] Compared with the prior art, the filter cartridge assembly 10 and the valve head assembly 20 of the present invention are detachably connected. After the second water sealing rod 22 is inserted into the first channel 121 for positioning, then the filter cartridge housing 11 is rotated to install the filter cartridge assembly 10 and the valve head assembly 20, and the installation is relatively convenient; after the filter cartridge assembly 10 and the valve head assembly 20 are disassembled from each other, the first water sealing rod 14 can automatically close the first channel 121 to achieve automatic water cut-off of the filter cartridge assembly 10; the second water sealing rod 22 can automatically close the second channel 23 to achieve automatic water cut-off of the valve head assembly 20. The filter cartridge assembly 10 and the valve head assembly 20 of the present invention have an automatic water cut-off function, which makes the installation direction diversified and the disassembly and assembly convenient; they also have a simple structure, sensitive water cut-off action, and good water cut-off sealing effect.

[0071] The above only uses embodiments to further illustrate the technical content of the present invention for the convenience of readers to understand more easily, but it does not mean that the implementation manners of the present invention are limited to this. Any technical extension or re-creation based on the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A filtering device with automatic water cut-off, characterized in that, Comprising a filter cartridge assembly and a valve head assembly detachably connected to the filter cartridge assembly; The filter cartridge assembly includes a filter cartridge housing, an inner cover provided at the upper end of the filter cartridge housing, and a filter element provided inside the filter cartridge housing; the inner cover is provided with a plurality of first channels for liquid inlet or outlet; the first channels are connected with first water sealing rods; the first water sealing rods move within the first channels to open or close the first channels; The valve head assembly includes a valve housing and a second water sealing rod; the valve housing is provided with a plurality of second channels for water passage; the second water sealing rods move within the second channels to open or close the second channels; after the filter cartridge assembly and the valve head assembly are installed, the first channels and the second channels communicate with each other; after the filter cartridge assembly and the valve head assembly are disassembled, the first water sealing rod seals the first channels, and the second water sealing rod seals the second channels; The valve housing includes a mounting seat and a water passage plate fixedly connected to the mounting seat; a plurality of opening holes are provided at the upper end of the mounting seat; the water passage plate is provided with a plurality of second through holes corresponding to the opening holes; the water passage plate is arranged at one end of the opening holes so that the opening holes and the water passage plate form the second channels; a protruding portion is provided at the lower end of the mounting seat; when the filter cartridge assembly and the valve head assembly are installed, the protruding portion is used to abut against the first water sealing rod, and the protruding portion is hermetically connected with a first sealing member provided in the first channels.

2. The filtering device with automatic water cut-off according to claim 1, characterized in that, The inner cover is hermetically connected to the inner wall of the filter cartridge housing, and the inner cover and the filter cartridge housing have relative rotation.

3. The filtering device with automatic water cut-off according to claim 1, characterized in that, A first elastic member is provided between the first water sealing rod and the first channels; the first elastic member is used to generate an elastic force on the first water sealing rod so that the first water sealing rod abuts against the first channels, forming a seal of the first water sealing rod to the first channels.

4. The filtering device with automatic water cut-off according to claim 3, characterized in that, A first sealing member is provided at the contact portion between the first channels and the first water sealing rod.

5. The filtering device with automatic water cut-off according to claim 1, characterized in that, The inner cover is fixed to the upper end of the filter cartridge housing through a provided pressing plate; the inner cover is provided with a plurality of mounting holes, and the pressing plate is provided with a plurality of first through holes corresponding to the mounting holes; the pressing plate and the mounting holes form the first channels.

6. The filtering device with automatic water cut-off according to claim 1, characterized in that, A filtering cavity is formed in the gap between the outer wall of the filter element and the inner wall of the filter cartridge housing; there are two first channels, one of the first channels communicates with the inner cavity of the filter element, and the other first channel communicates with the filtering cavity; the filter element is hermetically connected to the inner cover.

7. The filtering device with automatic water cut-off according to claim 1, characterized in that, A second elastic member is provided between the second water sealing rod and the second channels; the elastic force of the second elastic member makes the second water sealing rod abut against the second channels so that the second water sealing rod seals the second channels.

8. The filtering device with automatic water cut-off according to claim 7, characterized in that, A second sealing member is provided at the connection portion between the second channels and the second water sealing rod.

9. The filtering device with automatic water cut-off according to claim 8, characterized in that, A connection groove is provided at one end of the valve housing connected to the filter cartridge assembly; a hanging ear is provided on the outer side of one end of the filter cartridge housing connected to the valve head assembly; the hanging ear is connected to the connection groove.

10. The filtering device with automatic water cut-off according to claim 9, characterized in that, The valve housing further includes a hanging bracket; the hanging bracket is provided with a through cavity, and the connection groove is provided on the inner wall of the through cavity; the mounting seat is fixedly connected to the hanging bracket, and the protruding portion extends into the communication cavity.

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