CN216946472U - Leading filter core and water purification system - Google Patents

Abstract

The utility model discloses a preposed filter element and a water purification system, wherein the water purification system comprises a reverse osmosis filter component and a connecting part for installing the preposed filter element, and the preposed filter element comprises: the filter element body is used for being arranged on the connecting component and is provided with a water inlet, a water outlet and a water storage port; the filter material is arranged in the filter element body and is configured to be suitable for filtering the inlet water input from the water inlet and then conveying the filtered inlet water to the water outlet; the bracket is arranged on the filter element body and is provided with a plurality of water through holes; the soft water bag is arranged on the bracket and is provided with a water passing port which is communicated with the water storage port; wherein, the filter material is arranged around the bracket which is arranged around the soft water bag; the soft water bag can discharge water under the action of water pressure and flush the reverse osmosis filtering component when the water purifying system stops working, so that the water quality on two sides of an RO membrane in the reverse osmosis filtering component is approximately equal, and the water quality of the discharged water which is the first to discharge water when the water purifying system is opened after being not used for a long time is improved.

Description

Leading filter core and water purification system

Technical Field

The utility model relates to the technical field of water purification systems, in particular to a preposed filter element and a water purification system.

Background

The water purification system generally needs to include a reverse osmosis filtration module for producing pure water, but in case of long-term non-use, particles in front of the RO membrane in the reverse osmosis filtration module permeate through the RO membrane to the pure water side, resulting in poor initial water quality when the water is then opened. For this reason, generally can set up the water tank of a bath among the prior art, this water tank can be when water purification system stop work with the pure water washing reverse osmosis filter assembly of storing, nevertheless sets up the water tank and can lead to water purification system volume increase, and the cost-push also breeds the bacterium easily in the water tank.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to overcome the above-mentioned drawbacks and problems of the prior art, and to provide a pre-filter and a water purification system, in which a soft water bag is provided in the pre-filter, and the soft water bag can discharge water and flush a reverse osmosis filter module under the action of water pressure when the water purification system stops operating, so that the water quality on both sides of an RO membrane in the reverse osmosis filter module can be maintained substantially equal, thereby improving the water quality of the discharged water when the water is opened after the water is not used for a long time.

In order to achieve the purpose, the utility model adopts the following technical scheme:

a pre-filter cartridge for mounting to a connector component in communication with a reverse osmosis filtration assembly, the pre-filter cartridge comprising: the filter element body is used for being installed on the connecting part, and is provided with a water inlet, a water outlet and a water storage port, the water inlet is communicated with the water inlet end of the water purification system, the water outlet is communicated with the water inlet end of the reverse osmosis filtering component, and the water storage port is communicated with the water outlet end of the reverse osmosis filtering component; the filter material is arranged in the filter element body and is configured to be suitable for filtering the inlet water input from the water inlet and then conveying the inlet water to the water outlet; the bracket is arranged on the filter element body and is provided with a plurality of water through holes; the soft water bag is arranged on the bracket and is provided with a water passing port, and the water passing port is communicated with the water storage port; wherein, the filter media surrounds the support, and the support surrounds the soft water bag.

Furthermore, the filter element body comprises a filter element shell, a filter material base, a filter material end cap and a shell end cover which are fixedly connected with each other; the filter element shell is matched with the shell end cover to form an installation cavity, and the water inlet, the water outlet and the water storage port are arranged on the shell end cover; the filter material base is fixed at the bottom of the installation cavity far away from the shell end cover, and the filter material end cap is fixed at the shell end cover and is provided with a water inlet opening and a water outlet opening communicated with the water inlet and the water outlet; the filter material and the support are clamped and fixed in the mounting cavity by the filter material base and the filter material end cap.

Further, the soft water bag is provided with a water bag end cap, the water bag end cap is provided with the water outlet, and the water bag end cap is clamped and fixed by the bracket and the shell end cover; one end of the support abuts against the filter material base, and the other end of the support abuts against the shell end cover through the water bag end cap.

Furthermore, the water storage device also comprises plugging pieces and elastic pieces, wherein the number of the plugging pieces is consistent with that of the water inlet, the water outlet and the water storage port; the blocking piece is slidably mounted on the water inlet, the water outlet and the water storage port and is configured to be acted by the connecting component to open water at a port far away from the water inlet, the water outlet and the water storage port when the front filter element is mounted on the connecting component; the two ends of the elastic piece are respectively abutted to the filter element body and the blocking piece, and the elastic piece is suitable for pushing the blocking piece to abut to the ports of the water inlet, the water outlet and the water storage port to cut off water after the front filter element is detached from the connecting piece.

Further, the filter element body still includes the part of covering, the part of covering rigid coupling in the casing end cover and in the casing end cover cooperation forms water inlet, delivery port and retaining mouth are equipped with the water opening on it, the water opening forms water inlet, delivery port and retaining mouth are used for the port that communicates respectively with water purification system's the end of intaking, the end of water outlet and reverse osmosis filter component's the play water end.

Further, the shell end cover is provided with a water passing inner hole; the water passing inner hole is matched with a water passing hole in the cover part to form the water inlet, the water outlet and the water storage hole; the blocking piece is installed in cross the water hole, cross the water groove and locate cross the inside wall of water hole, elastic component one end butt in cross the bottom wall of water hole.

Furthermore, a sleeve connecting column is convexly arranged on the wall surface of the bottom of the water passing inner hole; one end of the elastic piece is sleeved on the sleeving connection column and is abutted against the wall surface of the bottom of the water passing inner hole.

Furthermore, the wall surface of the blocking piece facing the elastic piece is sunken to be provided with a plug-in slot; one end of the elastic piece is inserted into the insertion groove.

Further, the device also comprises a sealing ring; the plugging sealing ring is clamped and fixed in the water inlet, the water outlet and the water storage port by the shell end cover and the cover connecting part, and is suitable for being abutted by the plugging piece to plug the water inlet, the water outlet and the water storage port.

In addition, the utility model also provides a water purification system, which comprises a reverse osmosis filtering component, a connecting component and a preposed filter element as described in any one of the above items; the pre-filter element is configured to be mounted to the connector member to receive the feed water and communicate with the reverse osmosis filter assembly.

As can be seen from the above description of the present invention, the present invention has the following advantages over the prior art:

1. the preposed filter element can be arranged in the water purification system and is communicated with the reverse osmosis filtering component in the water purification system, and besides the function of basic filtering, the soft water bag is arranged in the reverse osmosis water purifier, the soft water bag can receive the filtered pure water when the reverse osmosis filtering component works, the water pressure at one end of the reverse osmosis filtering component is higher than the water pressure at the water inlet end of the water purifying system, so the soft water bag can be filled with the pure water, when the reverse osmosis filtering component stops working, the water pressure at the water inlet end of the water purifying system is larger than the water pressure at one end of the reverse osmosis filtering component, at the moment, water flow passes through the water through holes on the bracket and extrudes the soft water bag, so that the pure water in the soft water bag backflushes to the reverse osmosis filtering component through the water storage port, the ion concentrations at two sides of the RO membrane in the reverse osmosis filtering component are approximately equal, thereby improving the water quality of the outlet water at the beginning when the water outlet is opened after the water purification system is not used for a long time; in addition, in this leading filter core, set up soft water bag into the central point that encircles at the filter media and put, can improve the space utilization of filter core body to increase the volume of soft water bag, guarantee to have sufficient pure water can wash reverse osmosis filter assembly, and because soft water bag all can fill water and play water when water purification system work and stop at every turn, consequently inside is difficult for breeding the bacterium, makes the water safety obtain the guarantee.

2. The filter element body comprises a filter element shell, a filter material base, a filter material end cap and a shell end cover which are fixedly connected with each other, so that the filter material, the support and the soft water bag can be conveniently installed and fixed.

3. The soft water bag is provided with a water bag end cap, and the hard end cap can be clamped by the bracket and the shell end cover, so that the soft water bag can be fixed in the filter element body, and meanwhile, the water passing port is conveniently arranged to communicate the soft water bag with the water storage port.

4. Set up shutoff piece and elastic component, when this leading filter core was installed to adapting unit on, the shutoff piece was pushed open, the water route intercommunication, when this leading filter core was pulled down from adapting unit, shutoff piece shutoff water inlet, delivery port and hold the mouth of a river under the elastic component effect to prevent this internal water of filter core and the rivers play in the soft water bag, improved the convenience of this leading filter core dismouting.

5. The arrangement of the cover part facilitates installation of the plugging part and the elastic part.

6. The end cover of the shell is provided with a water passing inner hole, and the inner side wall of the water passing inner hole is provided with a water passing groove, so that the blocking piece is prevented from influencing water flow to pass through.

7. The bottom of the water passing inner hole is provided with a sleeving connection column, so that the position of the elastic piece is stable, and the elastic piece is prevented from falling off or shifting.

8. The plugging piece is provided with the plugging groove, so that the elastic piece is convenient to install, and the elastic piece can be prevented from falling off or shifting.

9. The sealing ring is arranged to ensure the sealing performance of the sealing piece when the water inlet, the water outlet and the water storage port are sealed.

10. The utility model also provides a water purification system, which can keep the highest water quality when the water is boiled again after long-time non-use because of the preposed filter element.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is an exploded view of an embodiment of a pre-filter according to the present invention;

FIG. 2 is a cross-sectional view of the front cartridge of FIG. 1;

FIG. 3 is a schematic view of the front cartridge of FIG. 1 when installed in a connection unit of a water purification system;

fig. 4 is a schematic view of the front filter cartridge of fig. 1 after being removed from a connection member of a water purification system.

Description of the main reference numerals:

a cartridge housing 11; a filter material base 12; a filter end cap 13; a water inlet opening 131; a water outlet opening 132; a housing end cap 14; a water passing inner hole 141; a water passing tank 1411; a socketed post 1412; a step portion 1413; a cover member 15; a water passing opening 151; sealing the sealing ring 16; a filter material 21; a bracket 31; water passing holes 311; a soft water bag 32; a water passing port 321; a bracket seal ring 33; an elastic member 41; the block piece 42; a plug groove 421; a water inlet 51; a water outlet 52; the water storage port 53.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are presently preferred embodiments of the utility model and are not to be taken as an exclusion of other embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.

In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.

In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" or "fixedly connected" should be interpreted broadly, that is, any connection between the two that does not have a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.

In the claims, the specification and the drawings of the present invention, the terms "including", "having" and their variants, if used, are intended to be inclusive and not limiting.

The embodiment of the utility model provides a water purification system, which mainly comprises a reverse osmosis filter component, a preposed filter element and a connecting component, wherein the reverse osmosis filter component is a conventional RO (reverse osmosis) membrane type filter component, can be connected with raw water and output pure water and discharge waste water, and due to the characteristics of an RO membrane, when the water purification system boils water again after being not used for a long time, the outlet water at the initial stage has higher ion concentration in the water and does not meet the water quality requirement, so the preposed filter element is arranged in the water purification system provided by the embodiment and can backflush the pure water stored in the preposed filter element to the reverse osmosis filter component when the water purification system stops working, and the ion concentrations of water stored at two sides of the RO membrane in the reverse osmosis filter component are approximately equal.

The preposed filter element mainly comprises a filter element body, a filter material 21, a support 31, a soft water bag 32 and a plurality of sealing rings, wherein the filter element body is arranged on a connecting part, a water inlet 51, a water outlet 52 and a water storage port 53 are arranged on the filter element body, the water inlet 51 is communicated with the water inlet end of a water purification system, the water outlet 52 is communicated with the water inlet end of a reverse osmosis filtering component, and the water storage port 53 is communicated with the water outlet end of the reverse osmosis filtering component.

The water purification system comprises a water purification system, a front filter element, a reverse osmosis filter assembly and a water inlet end, wherein the front filter element is arranged in the water purification system, and the front filter element is matched with the water inlet end of the water purification system and is communicated with the water outlet end of the reverse osmosis filter assembly. And, for cooperating with this leading filter core, still be provided with the structure that supports with water inlet 51, delivery port 52 and retaining mouth 53 correspond on adapting unit, this structure that supports can be the ejector pin that sets up in corresponding the opening.

Referring to fig. 1 and 2, the filter element body mainly includes a filter element housing 11, a filter element base 12, a filter element end cap 13, a housing end cap 14, a cover member 15, and a plugging seal ring 16, which are fixedly connected to each other.

The filter housing 11 is a cylindrical member with an open end, and the open end can be fixedly connected to the housing end cap 14, so as to form a mounting cavity in the filter housing 12, wherein the mounting cavity is used for mounting the filter material 21, the bracket 31 and the soft water bag 32.

Referring to fig. 3 and 4, the housing end cover 14 is provided with three water through inner holes 141, the cover member 15 is fixedly connected to the upper end of the housing end cover 14, the water through openings 151 provided in the cover member 15 correspond to the three water through inner holes 141 respectively and cooperate to form the water inlet 51, the water outlet 52 and the water storage port 53, and the water through openings 151 provided in the cover member 15 form water through ports of the water inlet 51, the water outlet 52 and the water storage port 53. Of course, in other embodiments, the water inlet 51, the water outlet 52 and the water storage port 53 may also be integrally formed by the housing end cover 14, which will not be described herein.

The filter material base 12 can be fixedly placed at the bottom position of the installation cavity in the filter element shell 11, which is far away from the shell end cover 14, the filter material base 12 is provided with an insertion structure matched with the filter material 21, and the lower end of the filter material 21 can be inserted and fixed on the filter material base 12. Meanwhile, the filter end cap 13 can be fixedly connected and matched with the shell end cap 14, and an inserting structure matched with the filter 21 is also arranged on the filter end cap, and the upper end of the filter 21 can be inserted and fixed on the filter end cap 13. During the installation, fix filter media base 12 and filter media end cap 13 earlier and form a whole on filter media 21, place this whole again into filter core casing 11 within, later with 14 rigid couplings of casing end cover in filter core casing 11, casing end cover 14 can cooperate with filter media end cap 13 this moment to the top supports filter media end cap 13, makes filter media 21 fixed by the centre gripping of filter media base 12 and filter media end cap 13.

In addition, the filter end cap 13 is provided with a water inlet opening 131 and a water outlet opening 132, and when the filter end cap 13 is fitted to the housing end cap 14, the water inlet opening 131 and the water outlet opening 132 are respectively communicated with the water inlet 51 and the water outlet 52.

The filter 21 is a conventional filter such as nonwoven fabric or activated carbon, but is wound into a circular tubular structure so that it can be fitted and fixed to the filter base 12 and the filter end cap 13 while forming a cavity inside thereof, and a holder 31 can be installed in the cavity so that the filter 21 is substantially disposed around the holder 31.

The support 31 is a circular tubular member with a length approximately equal to that of the filter medium 21, the inner cavity of the support is used for installing the soft water bag 32, and the shell of the support is provided with a water through hole 311, when water flows into the filter element body through the water inlet 51 and the water inlet opening 131, the water flows through the filter medium 21 under the action of water pressure, the filtered water fills the inner side of the filter medium 21, part of the filtered water is discharged through the water outlet 52, and the other part of the filtered water enters the inner side of the support 31 through the water through hole 311 to extrude the soft water bag 32.

The soft water bag 32 includes a hard bag body and a water bag end cap, the water bag end cap is provided with a water outlet 321, the water outlet 321 is communicated with the water storage 53, the water bag end cap is connected with the water bag body and can input water into the water bag body through the water outlet 321 or send water out of the water bag body through the water outlet 321. The water bag body can be made of materials such as rubber, when the water purification system works, because the water pressure at one end of the reverse osmosis filtering component is larger than the water pressure of the inlet water, the pure water generated by the reverse osmosis filtering component can be conveyed into the soft water bag 32, when the water purification system stops working, the water pressure of the inlet water is larger than the water pressure at one end of the reverse osmosis filtering component, and the water pressure can extrude the soft water bag 32 and backflush the pure water stored in the soft water bag into the reverse osmosis filtering component.

In addition, the water bag end cap also plays a role of facilitating installation of the soft water bag 32, the water bag end cap can be clamped by the end of the bracket 31 and the filter material end cap 13, so that the soft water bag 32 is fixed in the filter element body, and the bracket 31 is arranged around the water bag body of the soft water bag 32, so that the water pressure can uniformly extrude the outer side of the soft water bag 32. Meanwhile, a support sealing ring 33 is arranged between the water bag end cap and the inner wall of the support 21, and the support sealing ring 33 can prevent the reduction of the extrusion force on the water bag body caused by the outflow of water from the joint of the support 31 and the water bag end cap.

The pre-filter element provided by the embodiment further comprises an automatic water sealing structure, and the automatic water sealing structure mainly comprises an elastic part 41, a sealing part 42 and a sealing ring 16.

Each water passing inner hole 141 on the shell end cover 14 is provided with an elastic piece 41, a blocking piece 42 and a blocking sealing ring 16, the blocking piece 42 is slidably arranged on the water inlet 51, the water outlet 52 and the water storage port and is configured to be acted by the connecting part to be far away from the ports of the water inlet 51, the water outlet 52 and the water storage port 53 when the front filter element is arranged on the connecting part so as to open water passing, two ends of the elastic piece 41 are respectively abutted against the filter element body and the blocking piece 42, and the elastic piece is configured to be suitable for pushing the blocking piece 42 to be abutted against the water inlet 51, the water outlet 52 and the water storage port 53 after the front filter element is detached from the connecting part so as to cut off water passing.

Specifically, a stepped portion 1413 is formed at a port of the water passing hole 141 provided in the housing end cap 14, and the plugging seal ring 16 can be placed on the stepped portion 1413 and then clamped and fixed to the housing end cap 14 by the cover member 15. The inner side wall of the water passing inner hole 141 is provided with the water passing groove 134, the water passing groove 134 can avoid the influence of the blocking piece 42 on water passing when being installed in the water passing inner hole 141, the bottom wall surface of the water passing inner hole 141 is convexly provided with the sleeving column 1412, and the sleeving column 1412 can be used for installing and fixing the elastic piece 41.

The elastic member 41 may be a spring, one end of which is sleeved on the sleeved column 1412 arranged at the bottom of the water passing inner hole 141, the other end of which is abutted to the lower end surface of the blocking member 42, the blocking member 42 is concavely provided with an insertion groove 421 at the lower end surface thereof, and the end of the elastic member 41 may be inserted into the insertion groove 421.

The blocking member 42 may be made of rubber, and may cut off or open the water from the water inlet 51, the water outlet 52 and the water storage 53 by abutting against the blocking seal ring 16 or being away from the blocking seal ring 16. Since the water purification system is provided with the ejector rod on the connection member engaged with the pre-filter, when the pre-filter is mounted on the connection member, the plugging member 42 is pushed away from the plugging seal ring 16, and after the pre-filter is detached from the connection member, the elastic member 41 pushes the plugging member 42 to abut against the plugging seal ring 16.

When the filter medium is installed, the filter medium 21, the bracket 31 and the soft water bag 32 are installed in the filter element shell 11 through the filter medium base 12 and the filter medium end cap 13, then the shell end cap 14 is installed in the filter element shell 11, then the elastic member 41 and the blocking member 42 are installed in the water passing inner hole 141 of the shell end cap 14, and then the blocking sealing ring 16 is fixed on the shell end cap 14 through the covering member 15.

When the water purification system is in use, the filter element is mounted on the connecting component of the water purification system, the plugging piece 42 is pushed away from the plugging sealing ring 16, when the water purification system works, the pure water generated by the reverse osmosis filtering component enters the soft water bag 32 through the water storage opening 53, and then when the water purification system stops working, the soft water bag 32 backflushes the pure water stored in the soft water bag to the reverse osmosis filtering component under the action of water pressure.

The utility model provides a preposed filter element and a water purification system, wherein a soft water bag 32 is arranged in the preposed filter element, the soft water bag 32 can discharge water under the action of water pressure when the water purification system stops working and flush a reverse osmosis filter component, so that the water quality on two sides of an RO (reverse osmosis) membrane in the reverse osmosis filter component is kept approximately equal, and the water quality of the initial discharged water is improved when the water is opened after the water purification system is not used for a long time.

The description of the above specification and examples is intended to be illustrative, but not limiting, of the scope of the utility model. Modifications, equivalents and other improvements which may occur to those skilled in the art and which may be made to the embodiments of the utility model or portions thereof using a reasonable analysis, inference or limited experimentation based on the teachings of the utility model or the embodiments described above, and/or the common general knowledge, knowledge of the ordinary skill in the art and/or the prior art, are intended to be included within the scope of the utility model.

Claims (10)

1. A pre-filter cartridge for mounting to a connection member in communication with a reverse osmosis filtration assembly, comprising:

the filter element body is used for being installed on the connecting part, a water inlet, a water outlet and a water storage port are formed in the filter element body, the water inlet is communicated with the water inlet end of the water purification system, the water outlet is communicated with the water inlet end of the reverse osmosis filtering assembly, and the water storage port is communicated with the water outlet end of the reverse osmosis filtering assembly;

the filter material is arranged in the filter element body and is configured to be suitable for filtering the inlet water input from the water inlet and then conveying the inlet water to the water outlet;

the bracket is arranged on the filter element body and is provided with a plurality of water through holes;

the soft water bag is arranged on the bracket and is provided with a water passing port, and the water passing port is communicated with the water storage port;

wherein, the filter media surrounds the support, and the support surrounds the soft water bag.

2. The pre-filter cartridge of claim 1, wherein said filter cartridge body comprises a filter cartridge housing, a filter base, a filter end cap, and a housing end cap, all of which are fixedly connected to each other; the filter element shell is matched with the shell end cover to form an installation cavity, and the water inlet, the water outlet and the water storage port are arranged on the shell end cover; the filter material base is fixed at the bottom of the mounting cavity far away from the shell end cover, and the filter material end cover is fixed at the shell end cover and is provided with a water inlet opening and a water outlet opening which are communicated with the water inlet and the water outlet; the filter material and the support are clamped and fixed in the mounting cavity by the filter material base and the filter material end cap.

3. The front filter element as claimed in claim 2, wherein the soft water bag is provided with a water bag end cap, the water bag end cap is provided with the water passing opening and is clamped and fixed by the bracket and the shell end cover; one end of the support abuts against the filter material base, and the other end of the support abuts against the shell end cover through the water bag end cap.

4. A pre-filter cartridge as set forth in claim 3, further comprising a number of blocking members and elastic members corresponding to the number of said water inlet, outlet and inlet ports; the blocking piece is slidably mounted on the water inlet, the water outlet and the water storage port and is configured to be acted by the connecting component to open water at a port far away from the water inlet, the water outlet and the water storage port when the front filter element is mounted on the connecting component; the two ends of the elastic piece are respectively abutted to the filter element body and the blocking piece, and the elastic piece is suitable for pushing the blocking piece to abut to the ports of the water inlet, the water outlet and the water storage port to cut off water after the front filter element is detached from the connecting piece.

5. The pre-filter cartridge of claim 4, wherein the cartridge body further comprises a cover member fixedly attached to the housing end cap and cooperating with the housing end cap to form the water inlet, outlet and reservoir, the cover member having a water passage opening therein, the water passage opening forming a port for communicating with the water inlet, outlet and reservoir of the water purification system and the outlet of the reverse osmosis filter element.

6. The pre-filter cartridge of claim 5, wherein said housing end cap defines a water passing bore; the water passing inner hole is matched with a water passing hole in the cover part to form the water inlet, the water outlet and the water storage hole; the blocking piece is installed in cross the water hole, cross the water groove and locate cross the inside wall of water hole, elastic component one end butt in cross the bottom wall of water hole.

7. The pre-filter element as set forth in claim 6, wherein the bottom wall of the water passing inner hole is provided with a sleeve connection column in a protruding way; one end of the elastic piece is sleeved on the sleeving connection column and is abutted against the wall surface of the bottom of the water passing inner hole.

8. A pre-filter cartridge as claimed in claim 7, wherein said blocking member is recessed with a plug-in groove toward said wall of said resilient member; one end of the elastic piece is inserted into the insertion groove.

9. The pre-filter cartridge of claim 8, further comprising a plugging seal ring; the plugging sealing ring is clamped and fixed in the water inlet, the water outlet and the water storage port by the shell end cover and the cover connecting part, and is suitable for being abutted by the plugging piece to plug the water inlet, the water outlet and the water storage port.

10. A water purification system comprising a reverse osmosis filtration module, a connection member and a pre-filter element as claimed in any one of claims 1 to 9; the pre-filter element is configured to be mounted to the connector member to receive the influent water and communicate with the reverse osmosis filter assembly.

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