CN213680224U

CN213680224U - Leak protection filter core and water purifier

Info

Publication number: CN213680224U
Application number: CN202022592309.8U
Authority: CN
Inventors: 吴德安
Original assignee: Shenzhen Xiwei Technology Co ltd
Current assignee: Shenzhen Xiwei Technology Co ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-07-13
Anticipated expiration: 2030-11-11

Abstract

The utility model discloses a leak protection filter core and water purifier, the filter core includes the barrel, sets up the support in the barrel, be provided with filter screen or filter membrane in the support, still be provided with fixing base and rotation seat in the barrel, the one end of fixing base is connected with the support, the other end is connected with the rotation seat, the fixing base is worn to be equipped with the connecting channel and is linked through with filter screen or filter membrane, the rotation seat is worn to be equipped with the rivers passageway, the rivers passageway of rotation seat extends downwards and is provided with the connecting hole and exposes from the lower terminal surface of barrel; the rotating seat rotates relative to the fixed seat in the cylinder body to connect or disconnect the communication between the water flow channel and the connecting channel. The utility model discloses make the filter core of water purifier have the leak protection function, can not leak when renew cartridge.

Description

Leak protection filter core and water purifier

Technical Field

The utility model relates to a filter core technical field especially relates to a leak protection filter core and water purifier.

Background

Although the current household tap water is treated by a tap water plant, small-particle impurities such as organic matters, heavy metal ions, iron filings and the like exist after the household tap water is conveyed to a household through a pipe network, and the household water purifier is produced as long as people eat the household tap water and harm human health.

The water purifier generally includes the casing and sets up the filter equipment in the casing, and filter equipment generally comprises water route board and installs the filter core on the water route board, adopts grafting, joint or screwed connection between filter core and the water route board.

External raw water flows in from the water channel plate and then flows into the filter element through the water channel plate, and the raw water is filtered by the filter element to obtain purified water and then flows out through the water channel plate.

Current rivers passageway in the filter core and water route board are direct intercommunication and do not have leak protection mechanism, and when the renew cartridge like this, when the filter core takes out the back, the water in the filter core can be directly followed the filter core bottom and spilled that the influence is used and is experienced.

Therefore, the prior art has yet to be improved.

SUMMERY OF THE UTILITY MODEL

In view of the foregoing prior art, an object of the present invention is to provide a leakage-proof filter element and a water purifier, which can prevent water leakage when the filter element is replaced.

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

a leakage-proof filter element, which comprises a cylinder body and a bracket arranged in the cylinder body, wherein a filter screen or a filter membrane is arranged in the bracket,

a fixed seat and a rotating seat are further arranged in the barrel, one end of the fixed seat is connected with the support, the other end of the fixed seat is connected with the rotating seat, a connecting channel is arranged in the fixed seat in a penetrating manner and is communicated with the filter screen or the filter membrane, a water flow channel is arranged in the rotating seat in a penetrating manner, and the water flow channel of the rotating seat extends downwards to be provided with a connecting hole and is exposed out of the lower end face of the barrel;

the rotating seat rotates relative to the fixed seat in the cylinder body to connect or disconnect the communication between the water flow channel and the connecting channel.

The connecting nozzle is arranged between the bracket and the fixed seat and used for connecting the bracket and the fixed seat;

the pressing plate is arranged on the lower end face of the barrel and presses the lower end face of the rotating seat.

The water flow channel on the rotating seat at least comprises a first water inlet hole and a first water outlet hole, and the connecting hole on the rotating seat at least comprises a water inlet connecting hole and a water outlet connecting hole which are communicated with the first water inlet hole and the first water outlet hole and exposed from the lower end face of the cylinder body;

the connecting channel on the fixed seat at least comprises a second water inlet hole and a second water outlet hole, the upper end surface of the fixed seat is provided with a connecting pipe communicated with the second water outlet hole, the connecting pipe is connected with the connecting nozzle, and the second water inlet hole penetrates out of the upper end surface of the fixed seat outside the connecting pipe;

the upper end face of the rotating seat is abutted against the lower end face of the fixing seat, and the rotating seat rotates relative to the fixing seat in the barrel so that the first water inlet hole is aligned with or staggered with the second water inlet hole and the first water outlet hole.

The water flow channel on the rotating seat further comprises a first waste water hole, and the connecting hole on the rotating seat further comprises a waste water connecting hole communicated with the first waste water hole;

correspondingly, the connecting channel on the fixing seat further comprises a second waste water hole.

The connecting pipe arranged on the upper end face of the fixing seat comprises a first connecting pipe and a second connecting pipe sleeved outside the first connecting pipe, the first connecting pipe is internally provided with a second water outlet hole in a penetrating manner, and the second connecting pipe is internally provided with a second waste water hole outside the first connecting pipe in a penetrating manner.

The lower end face of the fixed seat is also provided with a rotary limiting groove with a preset length;

the upper end face of the rotating seat is also provided with a limiting rod, and the limiting rod is inserted into the rotating limiting groove and rotates within the preset length range of the rotating limiting groove, so that the rotating seat rotates relative to the fixed seat within the range.

A first sealing ring is sleeved at the contact position of the outer wall surface of the rotating seat and the inner wall surface of the cylinder body;

a second sealing ring is sleeved outside the second water inlet hole, the second water outlet hole and the second waste water hole on the lower end surface of the fixed seat respectively;

a third sealing ring is sleeved at the contact position of the outer wall surface of the lower part of the bracket and the inner wall surface of the cylinder body;

and fourth sealing rings are respectively arranged in the water inlet connecting hole, the water outlet connecting hole and the wastewater connecting hole of the rotating seat.

The lower end of the cylinder is also provided with a rotary connecting part for connecting a water path plate of the water purifier, the fixed seat and the cylinder are molded into an integral structure, the pressing plate is fixed on the lower end face of the rotary connecting part, and a connecting hole on the rotary seat is exposed from the lower end face of the rotary connecting part;

the upper end of the barrel is provided with a rotating handle.

The utility model also provides a water purifier, including the casing, wherein, be provided with foretell leak protection filter core in the casing.

The shell is internally provided with a plurality of leakage-proof filter elements, and the leakage-proof filter elements comprise an ultrafiltration filter element, a front activated carbon filter element, an RO (reverse osmosis) membrane filter element and a rear activated carbon filter element which are sequentially connected in series;

a tourmaline water-activating device is also arranged in the shell.

The utility model discloses a leak protection filter core, through set up the fixing base in the barrel and rotate the seat, it exposes the connecting hole and is used for communicating with the water route board of water purifier to rotate the seat from the lower terminal surface of barrel, it is rotatory in order to switch on or turn off the intercommunication of the rivers passageway of rotating the seat and the connecting channel of fixing base to rotate the seat in the barrel, like this when the renew cartridge, rotate the rotation seat of filter core earlier and make rivers passageway and connecting channel turn-off, then take off the filter core, water in the filter core can not the excessive spill because of the blockking of rotating the seat like this, when installing the filter core, the rotation seat of rotating the filter core makes rivers passageway and connecting channel switch on can. Thus, the utility model discloses a filter core has the leak protection function, and the dismouting of the filter core of being convenient for is maintained.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of a first embodiment of the leakage-proof filter element of the present invention;

FIG. 2 is a schematic view from the bottom side of the structure of FIG. 1;

FIG. 3 is an exploded view of the structure of FIG. 1;

FIG. 4 is a schematic structural view of the rotary base in FIG. 3;

FIG. 5 is an exploded view of the structure of FIG. 4;

FIG. 6 is a schematic structural view of the fixing base shown in FIG. 3;

FIG. 7 is a top view schematic diagram of the structure of FIG. 6;

FIG. 8 is an exploded bottom view of the structure of FIG. 6;

FIG. 9 is a schematic structural view of a first embodiment of the water purifier of the present invention;

FIG. 10 is a schematic structural view of the water purifier of the present invention with the upper cover removed;

fig. 11 is a schematic view of the internal structure of the water purifier of the present invention.

Description of reference numerals:

100-filter element, 1-cylinder, 2-bracket, 21-third sealing ring, 3-filter screen or filter membrane, 4-fixing seat, 41-connecting pipe, 411-first connecting pipe, 412-second connecting pipe, 42-rotation limiting groove, 43-second sealing ring, 5-rotation seat, 51-limiting rod, 52-first sealing ring, 53-third sealing ring, 6-connecting channel, 61-second water inlet hole, 62-second water outlet hole, 63-second waste water, 7-water flow channel, 71-first water inlet hole, 72-first water outlet hole, 73-first waste water hole, 8-connecting hole, 81-water inlet connecting hole, 82-water outlet connecting hole, 83-waste water connecting hole, 9-connecting nozzle, 10-pressing plate, 11-a rotary connecting part, 12-a rotary handle, 101-an ultrafiltration filter core, 102-a front activated carbon filter core, 103-an RO membrane filter core, 104-a rear activated carbon filter core, 200-a water purifier, 201-a shell, 202-a water board, 203-a tourmaline water activating device, 204-an upper drainage port, 205-an upper cover, 206-a water inlet and 207-a water outlet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "connected" may be a fixed connection or a removable connection, or may be integral therewith; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.

Referring to fig. 1 to 3, the present invention provides a leakage-proof filter element 100, which includes a cylinder 1 and a support 2 disposed in the cylinder, wherein a filter screen or a filter membrane 3 is disposed in the support 2. The filter screen can be an activated carbon fiber filter screen, and the filter membrane can be a UF filter membrane or an RO filter membrane. Raw water passes through the filter screen or the filter membrane 3 from the outside of the filter screen or the filter membrane 3 for filtration, and the filtered clean water is collected and led out from a pipeline in the filter screen or the filter membrane 3.

Still be provided with fixing base 4 and rotate seat 5 in the barrel 1, the one end and the support 2 of fixing base 4 are connected, and the other end is connected with rotation seat 5, and connecting channel 6 and filter screen or filter membrane 3 intercommunication are worn to be equipped with by fixing base 4, rotate seat 5 and wear to be equipped with rivers passageway 7, and the rivers passageway 7 downwardly extending who rotates seat 5 is provided with connecting hole 8 and exposes from the lower terminal surface of barrel 1. The water flow channel 7 of the rotating seat 5 comprises water inlet and water outlet, the water inlet is connected with the water inlet of the water circuit board of the water purifier, and the water outlet is connected with the water outlet of the water circuit board. The raw water entering the rotating seat 5 flows into the connecting channel 6 of the fixed seat 4 again, then flows out of the filter screen or the filter membrane 3, enters the filter screen or the filter membrane 3 through the filter screen or the filter membrane 3 to be filtered, the filtered purified water is collected and led out to the connecting channel 6 of the fixed seat 4 from a pipeline in the filter screen or the filter membrane 3, and the purified water enters the water outlet board of the rotating seat 5 through the connecting channel 6 of the fixed seat 4.

The utility model discloses a rotation seat 5 of filter core 100 is rotatory in order to switch on or turn-off in barrel 1 relative fixing base 4 the intercommunication of rivers passageway 7 and connecting channel 6.

The principle is as follows: when changing the filter core, rotate the seat 5 of rotation of filter core 100 earlier and make the rivers passageway 7 of rotating seat 5 and the interface channel 6 of fixing base 4 turn-off for rotate the seat 5 and block the water in filter screen or the filter membrane 3 and spill over from the interface channel 6 of fixing base 4 and leak, then take off filter core 100 from spliced pole 6, like this, even take off filter core 100, water in the filter core 100 also can not spill over. When the filter cartridge 100 is installed, the rotating base 5 of the filter cartridge 100 is rotated to communicate the water flow passage 7 of the rotating base 5 with the connection passage 6 of the fixed base 4, so that water can flow in and out of the water flow passage 7 of the rotating base 5 of the filter cartridge 100 normally.

Because the utility model discloses a fixing base 4 of filter core 100 sets up with the rotation that rotates seat 5 for filter core 100 has the function of leak protection water, dismantles the in-process at filter core 100, and the water in the filter core 100 can not spill over, and the dismouting of the filter core 100 of being convenient for is maintained, improves and uses experience.

The leakage-proof filter element 100 of the utility model also comprises a connecting nozzle 9 and a pressing plate 10, wherein the connecting nozzle 9 is arranged between the bracket 2 and the fixed seat 4 and is used for connecting the bracket 2 and the fixed seat 4; the connecting nozzle 9 is convenient for the installation and connection of the bracket 2 and the fixed seat 4.

The pressing plate 10 is installed on the lower end face of the cylinder 1 and presses the lower end face of the rotating seat 5. The pressing plate 10 can block the rotating seat 5 to prevent the rotating seat 5 from being separated from the cylinder body 1, and meanwhile, the pressing plate 10 cannot press the rotating seat 5 to enable the rotating seat 5 to rotate in the cylinder body 1 relative to the fixing seat 4.

Specifically, as shown in fig. 4 and 5, the utility model discloses water flow channel 7 on the rotation seat 5 of filter core 100 includes first inlet opening 71, first apopore 72 at least, rotate connecting hole 8 on the seat 5 at least include with the water inlet connecting hole 81 and the water outlet connecting hole 82 that first inlet opening 71, first apopore 72 intercommunication and follow the lower terminal surface of barrel 1 and expose. The water inlet connection hole 81 and the water outlet connection hole 82 are used for connecting water inlet and outlet on the water path plate.

As shown in fig. 6 to 8, the connection channel 6 on the fixing base 4 of the filter element 100 of the present invention at least includes a second water inlet hole 61 and a second water outlet hole 62, the upper end surface of the fixing base 4 is provided with a connection pipe 41 and a second water outlet hole 62, the connection pipe 41 is connected with the connection nozzle 9, the second water inlet hole 61 is disposed outside the connection pipe 41 and is connected to the upper end surface of the fixing base 4. Since the connection nozzle 9 is connected to the inside of the filter net or the filter membrane 3, the second outlet hole 62 in the connection pipe 41 is used to discharge purified water, and the second inlet hole 61 outside the connection pipe 41 is used to input raw water to the outer side surface of the filter net or the filter membrane 3.

The upper end surface of the rotating seat 5 is abutted against the lower end surface of the fixed seat 4, and the rotating seat 5 rotates relative to the fixed seat 4 in the cylinder 1 so that the first water inlet hole 71 is aligned with or staggered with the second water inlet hole 61 and the first water outlet hole 72 is aligned with or staggered with the second water outlet hole 62.

Namely, when the rotating seat 5 rotates, the first water inlet 71 on the rotating seat 5 and the second water inlet 61 on the fixed seat 4 are rotated, and the first water outlet 72 on the rotating seat 5 is aligned with or staggered with the second water outlet 62 on the fixed seat 4. When the water inlet holes are staggered, water in the cylinder 1 and the filter screen or the filter membrane 3 normally flows in and out through the first water inlet hole 71 and the second water inlet hole 61, and the first water outlet hole 72 and the second water outlet hole 62. The rotation setting of the relative fixing base 4 of the rotating base 5 realizes the leakage-proof and conduction functions of the filter element 100.

Further, the water flow channel 7 on the rotating seat 5 of the filter element 100 of the present invention further includes a first waste water hole 73, and the connecting hole 8 on the rotating seat 5 further includes a waste water connecting hole 83 communicated with the first waste water hole 73;

correspondingly, the connecting channel 6 on the fixed seat 4 further comprises a second waste water hole 63. The second waste water hole 63 is communicated with or disconnected from the first waste water hole 73. Thus, the filter cartridge 100 of the present invention may be a filter cartridge having a waste water discharge function, such as a UF membrane filter cartridge or an RO membrane filter cartridge.

Specifically, as shown in fig. 7, the utility model discloses connecting pipe 41 that fixing base 4 up end set up includes first connecting pipe 411 and the cover establishes second connecting pipe 412 outside first connecting pipe 411, wears to establish in first connecting pipe 411 second apopore 62, the second waste water hole 63 is worn to be equipped with outward in the second connecting pipe 412 in first connecting pipe 411. First connecting pipe 411 is connected with connector 9, lug connection to the inside of filter screen or filter membrane 3 for the water purification of discharging, second connecting pipe 412 cover is established outside connector 9, make second waste water hole 63 and filter screen or filter membrane 3's outside intercommunication, close when second apopore 62, when second waste water hole 63 was opened, to second inlet opening 61 input water, can discharge the outer impurity of filter screen or filter membrane 3 from second waste water hole 63, play and wash, the effect of wasting discharge.

Referring to fig. 5 and 8, further, a rotation limiting groove 42 with a preset length is further disposed on the lower end surface of the fixing base 4 of the present invention; the upper end surface of the rotating seat 5 is further provided with a limiting rod 51, and the limiting rod 51 is inserted into the rotation limiting groove 42 and rotates within a preset length range of the rotation limiting groove 42, so that the rotating seat 5 rotates relative to the fixed seat 4 within the range.

The matching arrangement of the limiting rod 51 and the rotation limiting groove 42 enables the rotation seat 5 to rotate back and forth only within the length range of the rotation limiting groove 31, so that the rotation seat 5 can be prevented from rotating over position and failing to achieve the function of leakage prevention or conduction. Preferably, the rotation-limiting slot 42 is an arcuate slot.

Preferably, the first sealing ring 52 is sleeved on the contact position between the outer wall surface of the rotating seat 5 of the filter element 100 and the inner wall surface of the cylinder 1.

And the lower end surface of the fixed seat 4 is respectively sleeved with a second sealing ring 43 outside the second water inlet hole 61, the second water outlet hole 62 and the second waste water hole 63.

In the water flow path between the rotating seat 5 and the fixed seat 4, the first sealing ring 52 is the first sealing, and the second sealing rings 43 of the second water inlet hole 61, the second water outlet hole 62 and the second waste water hole 63 are the second sealing.

A third sealing ring 21 is sleeved at the contact position of the outer wall surface of the lower part of the bracket 2 and the inner wall surface of the cylinder 1.

And third sealing rings 53 are respectively arranged in the water inlet connecting hole 81, the water outlet connecting hole 82 and the waste water connecting hole 83 of the rotating seat 5.

Thus, the structural joints in the filter element 100 of the present invention can be well sealed.

As shown in fig. 1 and 2, the lower end of the cylinder 1 of the filter element 100 of the present invention is further provided with a water channel plate for connecting the water purifier, the fixing base 4 and the cylinder 1 are molded into an integral structure, the pressing plate 10 is fixed on the lower end surface of the rotating connecting portion 11, and the connecting hole 8 on the rotating base 5 is exposed from the lower end surface of the rotating connecting portion 11. The rotary connecting part 11 facilitates the screwing-in type installation of the filter element 100, and the screwing-in type installation mode enables the rotary seat 5 of the filter element 100 to be connected with or disconnected from the water channel plate during installation, so that the operation is convenient and rapid.

The fixing seat 4 and the cylinder 1 are molded into an integral structure, so that when the filter element 100 is assembled, only the rotating seat 5 needs to be arranged to be abutted against the lower end face of the fixing seat 4.

The utility model discloses the upper end of barrel 1 of filter core 100 is provided with twist grip 12. Rotating handle 12 facilitates the screw-in installation operation of filter cartridge 100.

As shown in fig. 9 to 10, the present invention further provides a water purifier 200, which includes a casing 201, wherein the leakproof filter element 100 is disposed in the casing 201. Because the utility model discloses a water purifier 200 has set up leak protection filter core 100, so when renew cartridge 100, pull down filter core 100 after, the water in the filter core 100 can not spill.

Preferably, the housing 201 of the water purifier 200 of the present invention is provided with a water inlet 206 and a water outlet 207.

The top of the housing 201 is further provided with an upper drainage port 204, so that the water purifier 200 of the present invention has two drainage positions, one is a common upper drainage port 207 communicated with the waterway plate 202, the other is an upper drainage port 204 for draining water from the top, and the upper drainage port 204 is mainly used for placing the water purifier 200 in a higher place.

Specifically, the utility model discloses be provided with a plurality of leak protection filter cores 100 in the casing 201 of water purifier 200, these a plurality of leak protection filter cores 100 are including the ultrafiltration filter core 101, leading active carbon filter core 102, RO membrane filter core 103 and the rearmounted active carbon filter core 104 that concatenate in proper order.

The utility model discloses a water purifier 200 obtains highly purified water after the filtering action of four filter cores to guarantee health, the safety of human drinking water.

As shown in fig. 9 and 10, the water purifier 200 of the present embodiment has a detachable top cover 205 at the top end of the housing 201, and when the water purifier is installed, the filter element installation cavities with open top ends can be exposed by opening the top cover 205. Then the ultrafiltration filter element 101, the preposed activated carbon filter element 102, the RO membrane filter element 103 and the postposition activated carbon filter element 104 are respectively inserted into each installation cavity and are fixedly connected with the water circuit board 202 at the lower end. Thus, the utility model discloses a water purifier 200 need not to unpack whole casing 201 apart when carrying out the installation and the dismantlement of filter core, and carries out quick, the convenient installation and the change of filter core from the top of water purifier 200.

Further, as shown in fig. 11, a tourmaline water activating device 203 is further disposed in the casing 201 of the water purifier 200. Specifically, the tourmaline water activating device 203 is arranged between the water outlet end of the rear activated carbon filter element 104 and the water outlet 207. The tourmaline water activating device 203 can activate the purified water before sending the purified water to the water outlet 207, so that the purified water becomes a water molecular group structure which is most beneficial to the health of human bodies.

The embodiment of the utility model provides a leak protection filter core 100 and water purifier 200, through set up fixing base 4 and rotation seat 5 in barrel 1, it exposes connecting hole 8 from barrel 1's lower terminal surface to rotate seat 5 and is used for communicating with water route board 202 of water purifier 200, it is rotatory in order to switch on or turn off the intercommunication of the rivers passageway 7 of rotating seat 5 and the interface channel 6 of fixing base 4 to rotate seat 5 relative to fixing base 4 in barrel 1, like this when renew cartridge 100, rotate earlier the rotation seat 5 of filter core 100 and make rivers passageway 7 and interface channel 6 turn-off, then take off filter core 100 again, water in the filter core 100 can not be excessive because of the stopping of rotating seat 5 like this, during installation filter core 100, the rotation seat 5 of rotating filter core 100 makes rivers passageway 7 and interface channel 6 switch on can. Thus, the utility model discloses a filter core 100 has the leak protection function, and the dismouting of the filter core of being convenient for is maintained, promotes to use and experiences.

The above only for the purpose of clearly illustrating the examples of the present invention, not limiting the scope of the present invention, can't be exhausted to all the embodiments, all the concepts of the present invention, utilize the equivalent structure transformation of the content of the technical solution of the present invention, or directly/indirectly use in other related technical fields and are all included in the protection scope of the present invention.

Claims

1. A leak-proof filter element comprises a cylinder body and a bracket arranged in the cylinder body, wherein a filter screen or a filter membrane is arranged in the bracket,

2. The leakage-proof filter element of claim 1, further comprising a connection nozzle and a pressing plate, wherein the connection nozzle is arranged between the bracket and the fixing seat for connecting the bracket and the fixing seat;

3. The leakproof filter element according to claim 2, wherein the water passage on the rotary seat comprises at least a first water inlet hole and a first water outlet hole, and the connecting holes on the rotary seat comprise at least a water inlet connecting hole and a water outlet connecting hole which are communicated with the first water inlet hole and the first water outlet hole and exposed from the lower end surface of the cylinder body;

4. The leak-resistant filter cartridge of claim 3, wherein the water flow passage in the rotary seat further comprises a first waste water hole, and the connection hole in the rotary seat further comprises a waste water connection hole communicating with the first waste water hole;

5. The leakage-proof filter element of claim 4, wherein the connecting tube disposed on the upper end surface of the fixing base comprises a first connecting tube and a second connecting tube sleeved outside the first connecting tube, the second water outlet hole is formed in the first connecting tube, and a second waste water hole is formed in the second connecting tube and penetrates outside the first connecting tube.

6. The leakage-proof filter element of claim 3, wherein the lower end surface of the fixing seat is further provided with a rotation limiting groove with a preset length;

7. The leakage-proof filter element of claim 4, wherein a first sealing ring is sleeved at the contact position of the outer wall surface of the rotating seat and the inner wall surface of the cylinder body;

8. The leakage-proof filter element according to claim 2, wherein the lower end of the cylinder is further provided with a rotary connecting part for connecting a waterway plate of a water purifier, the fixed seat and the cylinder are molded into a whole structure, the pressure plate is fixed on the lower end surface of the rotary connecting part, and the connecting hole on the rotary seat is exposed out of the lower end surface of the rotary connecting part;

the upper end of the barrel is provided with a rotating handle.

9. A water purifier comprising a housing, wherein a leak-proof filter element as claimed in any one of claims 1 to 8 is provided in the housing.

10. The water purifier of claim 9, wherein a plurality of leak-proof filter elements are arranged in the housing, and the leak-proof filter elements comprise an ultrafiltration filter element, a front activated carbon filter element, an RO membrane filter element and a rear activated carbon filter element which are connected in series in sequence;

a tourmaline water-activating device is also arranged in the shell.