CN215208936U

CN215208936U - Filter element and single-stage water purifier and multi-stage water purifier applying same

Info

Publication number: CN215208936U
Application number: CN202121667060.0U
Authority: CN
Inventors: 张剑飚
Original assignee: Quanzhou Ciguang Technology Co ltd
Current assignee: Quanzhou Ciguang Technology Co ltd
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-12-17
Anticipated expiration: 2031-07-21

Abstract

The utility model discloses a filter core, include: the filter element shell and five stages of filter layers are arranged in the filter element shell in sequence from the water inlet end to the water outlet end; the first-stage filter layer is filled with terahertz ceramic balls, the second-stage filter layer is filled with microcrystal activation balls, the third-stage filter layer is filled with terahertz stones, the fourth-stage filter layer is filled with hydrogen-rich ceramic balls, and the fifth-stage filter layer is filled with microporous antibacterial balls. The utility model also discloses a single-stage water purifier and the multi-stage water purifier of using above-mentioned filter core. The utility model discloses a five-stage filter layer has adopted the material that corresponds the frequency with the hydrone, can take place resonance with the hydrone and make quality of water activation, and the hydrone structure is rearranged, can produce the healthy water of relatively stable micromolecule, and the water after purifying contains rich hydrogen, the activation is high, the antibacterial rate reaches more than 99.2%, and the taste is sweet and smooth, and its quality is more close natural water source.

Description

Filter element and single-stage water purifier and multi-stage water purifier applying same

Technical Field

The utility model relates to a water purification technology field, concretely relates to filter core, single-stage water purifier and multi-stage water purifier who uses this filter core.

Background

Cellular ecological healthy water is awarded according to the 2003 year world nobel chemical prize: american scientists, doctor of the medical college at hopkins university, professor in biochemistry and medicine, peter alogrel "cell membrane water channel discovery" and american scientists, professor in neurobiology and biophysics at rockfiler university, rodrek, maijinnong "structure and mechanism of cell membrane ion channels", and world nobel medical awarder in 1963: haxili et al, which discovered that ions can pass from one nerve cell to another nerve cell. The cell and the surrounding environment exchange information, substances and energy, and the core of the method is to realize the life function of the cell by means of the entrance and exit of water molecules and various ions in a cell membrane channel. And the life information of one cell is transmitted to another cell, so that the genetic multiplication of the cell is realized. Water in nature does not exist in the form of a single water molecule (H2O), but a plurality of water molecules are aggregated together through hydrogen bond action to form a water molecule cluster, which is commonly called as a water molecule group in China. The water molecule groups are divided into large molecule groups and small molecule groups. The small water molecular groups are easy to be absorbed by human cells, so that the physiological function of the water is reflected to be strong, and the water with strong physiological function is also called as active water. The water with the macromolecular group structure is a random and amorphous chain-shaped coil, the dissolving capacity and the permeability of the water are very low, the water is difficult to enter human cells, only the water with the macromolecular group structure similar to liquid crystal and with the short chain-shaped structure can easily enter the cells to participate in life metabolism activities, and various ions are brought to cell membrane ion channels to enter the cells. In addition, the water molecule group is small, the activity is high, and the water is drunk well; and the larger the water molecular group, the smaller the activity, so the drinking is not good.

All things in nature and universe, including living bodies, electrons, atoms, molecules, etc., are composed of weak energy particles, and it has been confirmed that they emit electromagnetic waves (light) while vibrating strongly. Terahertz waves, which are one of these electromagnetic waves (light), have a longer wavelength than far infrared rays (wavelength of 3 to 12 micrometers), and are about 10 to 1000 micrometers. The conventional far infrared ray has only a light property, but the terahertz wave has two properties of a straight-forward property of light and a penetrability of an electric wave, so that the terahertz wave has a stronger ability to penetrate living bodies and substances than the far infrared ray.

The frequency of terahertz waves is about 1 megahertz (12 th power of 10), and is equivalent to the level of molecular vibration and lattice vibration of cells, and thus the terahertz waves are called "life waves". Can be selectively absorbed by organic molecules, water, polymers, crystals, etc., and therefore even a small amount of the compound can cause a large change. Researches show that the terahertz resonance material has various health functions of emitting terahertz waves, radiating far infrared rays, resisting bacteria, purifying water, dissolving out trace elements beneficial to human health, releasing negative ions, improving the germination rate of plant seeds and the like, contains hydrogen-rich water, activated water and purified water, and is prepared from natural materials such as natural materials, natural materials and natural materials. Can be used in various industries for treating drinking water (such as water purifiers, water purifying kettles, water cups and humidifiers).

At present, the so-called small molecular group water production method on the market generally utilizes mineral electrolyzed water (such as mineral matters like tourmaline and the like) and magnetization equipment to treat water and the like to enable large molecular group water to be decomposed into 5-8 small molecular group water from 15-20 water molecules, and because the small molecular group water obtained by the method does not substantially change the arrangement problem of the water molecule structure, although the water is treated by a static magnetic field or a variable magnetic field, or mineral electrolyzed treatment and the like, the physicochemical property of the water can be changed into 5-8 small molecular group water, and the property can be kept for hours, but related researches show that the small molecular group water obtained by the modes of electrolysis or magnetization and the like can be changed according to the temperature, environment, time, ion concentration, pH value, and energy applied from the outside, such as electric field, magnetic field, sound wave, oxygen, carbon dioxide, carbon, the hydrogen bond content in water increases slightly by radiation, infrared rays, pressure, and the like, and the cluster reduction of water increases.

Therefore, how to apply the existing materials to produce relatively stable small molecule water beneficial to human health becomes an urgent problem to be solved in the prior art.

Disclosure of Invention

One of the objectives of the present invention is to provide a filter element, which can resonate with water molecules to activate water quality and form relatively stable small molecule active water. The second purpose of the utility model is to provide a single-stage water purifier and multi-stage water purifier can obtain the straight drinking water of high standard through purifying to quality of water.

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

the utility model discloses a filter core, include: the filter element shell and five stages of filter layers are arranged in the filter element shell in sequence from the water inlet end to the water outlet end; the first-stage filter layer is filled with terahertz ceramic balls, the second-stage filter layer is filled with microcrystal activation balls, the third-stage filter layer is filled with terahertz stones, the fourth-stage filter layer is filled with hydrogen-rich ceramic balls, and the fifth-stage filter layer is filled with microporous antibacterial balls.

The filter element shell comprises a shell, an upper end cover and a lower end cover, wherein the upper end cover and the lower end cover are respectively packaged at the upper end and the lower end of the shell; the lower end cover is provided with a PP cotton pad, and every two filter layers are separated by non-woven fabrics.

In one embodiment, the water inlet end is arranged on the upper end cover, the water outlet end is arranged on the lower end cover, and the five-stage filter layers are arranged layer by layer from top to bottom.

In another embodiment, the water inlet end is arranged on the side wall of the shell of the filter element shell, the water outlet end is positioned in the center of the lower end cover, and the five-stage filter layers are annularly arranged from outside to inside.

Preferably, the particle size of the terahertz stone is 5-8 mm, and the particle size of the terahertz ceramic ball, the microcrystal activation ball, the hydrogen-rich ceramic ball and the micropore antibacterial ball is 2-8 mm.

The utility model also discloses a single-stage water purifier, a serial communication port, including urceolus, upper cover and the filter core of setting in the urceolus inside, the upper cover install and seal in urceolus top the urceolus, urceolus lateral wall upper portion be provided with the water inlet, urceolus lateral wall lower part be provided with the drain, the bottom of urceolus is provided with the water purification mouth, the filter core be above-mentioned the filter core, the water purification mouth intercommunication of the play water end of filter core and urceolus bottom.

Preferably, the water inlet end of the filter element is arranged on the side wall of the filter element shell, the water outlet end of the filter element is arranged at the center of the bottom of the filter element shell, and the five-stage filter layers are annularly arranged from outside to inside; the filter element shell consists of a diatom ceramic layer, an active carbon layer and a polypropylene fiber mesh from outside to inside, and the outer cylinder is made of stainless steel materials.

The utility model also discloses a multistage water purifier includes that a plurality of levels of cartridge filters establish ties in proper order from water inlet to delivery port: be provided with the cotton compound carbon filter core of PP in the first grade cartridge filter, be provided with the antibiotic filter core of graphite alkene in the second grade cartridge filter, be provided with the cavity ultrafiltration membrane filter core in the third grade cartridge filter, be provided with the aforesaid in the fourth grade cartridge filter the filter core.

Further, the filter comprises a fifth-stage filter cylinder connected in series behind the fourth-stage filter cylinder, and a nano-scale antibacterial filter element is arranged in the fifth-stage filter cylinder.

Preferably, the cartridge shell of each stage of filter cartridge is made of stainless steel material, the filter element shell of the fourth stage of filter cartridge is made of food grade polypropylene material, the water inlet end is arranged at the upper end of the filter element shell, the water outlet end is arranged at the lower end of the filter element shell, and the five stages of filter layers are arranged layer by layer from top to bottom.

Due to the adoption of the structure, the utility model discloses following beneficial effect has: the utility model discloses a five-stage filter layer has adopted the material that corresponds the frequency (the vibration frequency number is 10 power of 12 Hertz) with the hydrone, can take place resonance with the hydrone and make water quality activation, and the hydrone structure is rearranged, can produce the healthy water of relatively stable micromolecule, and the water after the purification contains rich hydrogen, the activity is high, the antibacterial rate reaches more than 99.2%, and the taste is sweet and smooth, and its quality is more close natural water source.

Drawings

Fig. 1 is a schematic view of a filter element according to an embodiment.

Fig. 2 is a schematic cross-sectional view of a filter element according to an embodiment.

FIG. 3 is a schematic structural view of a second core according to the embodiment.

Fig. 4 is a schematic cross-sectional view of a filter element according to a second embodiment.

Fig. 5 is a schematic axial sectional view of a filter element according to the second embodiment.

FIG. 6 is a schematic structural view of a cartridge case according to the second embodiment.

FIG. 7 is a schematic structural view of a three-stage water purifier according to an embodiment.

FIG. 8 is a schematic view of the structure of a four-stage water purifier according to an embodiment.

Description of the main component symbols:

1: filter element case, 11: water inlet end, 12: a water outlet end, 13 parts of a diatomite ceramic layer, 14 parts of an activated carbon layer, 15 parts of a polypropylene fiber mesh cloth, 16 parts of: PP cotton pad, 17: a housing, 18: upper end cap, 19: lower end cap, 2: terahertz ceramic ball, 3: microcrystalline activated spheres, 4: terahertz stone, 5: hydrogen-rich ceramic balls, 6: microporous antibacterial ball, 7: outer cylinder, 71: water inlet, 72: drain, 73: clean water gap, 8: upper cover, 91: first stage filter cartridge, 92: second-stage filter cartridge, 93: third stage filter cartridge, 94: fourth stage filter cartridge, 95: fifth stage filter cartridge, 10: a nonwoven fabric.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

Example one

As shown in fig. 1 to 6, the present embodiment discloses a filter element, including: the filter element comprises a filter element shell 1, and a first-stage filter layer, a second-stage filter layer, a third-stage filter layer, a fourth-stage filter layer and a fifth-stage filter layer which are arranged in the filter element shell 1 in sequence from a water inlet end to a water outlet end. The filter element shell 1 comprises a shell body 17, an upper end cover 18 and a lower end cover 19, wherein a PP cotton gasket 16 is arranged on the lower end cover 19. The five-stage filter layer is arranged in the shell 17, and the non-woven fabric 10 can be laid between every two stages of filter layers for separating the five-stage filter layer. The upper and

lower end caps

18, 19 are then respectively potted onto the upper and lower ends of the housing 17 to form the filter cartridge. The five-stage filter layer materials are shown in table 1 and detailed below.

TABLE 1 five stage Filter layer Material

Number of stages	Material	Particle size
			First stage	Terahertz ceramic ball	2～8mm
Second stage	Microcrystal activation ball	2～8mm
			Third stage	Terahertz stone	5～8mm
Fourth stage	Hydrogen-rich ceramic ball	2～8mm
			Fifth stage	Microporous antibacterial ball	2～8mm

The terahertz ceramic ball 2 is filled in the first-stage filter layer, the terahertz ceramic ball 2 is formed by firing a ceramic material capable of releasing terahertz waves at high temperature, the terahertz ceramic ball has the function of releasing natural terahertz waves, water is firstly contacted with the terahertz ceramic ball, and 52 Hz micromolecular water can be generated through resonance.

The second-stage filter layer is filled with microcrystalline activation balls 3, and the microcrystalline activation balls 3 are made of microcrystalline stone. Can generate radiation infrared wave, the water passing through the first filtering layer contacts with the microcrystal activation ball, and the activity of the water is improved by utilizing the radiation of the infrared ray.

The third filtering layer is filled with terahertz stones 4, the terahertz stones 4 are formed by sintering ores capable of releasing terahertz waves at high temperature, and the terahertz stones have the function of releasing natural terahertz waves. The terahertz stone can emit terahertz waves again, and water molecules can resonate again, so that small molecule water of 41 Hz is generated.

The fourth filtering layer is filled with hydrogen-rich ceramic balls 5, the hydrogen-rich ceramic balls 5 are functional ceramic materials which are formed by compounding mineral materials and alloy materials and baking at low temperature, the hydrogen-rich ceramic balls 5 form hydrogen ions and hydroxyl ions by utilizing the characteristic of micro-electrolysis on water, and the hydrogen ions are combined to form hydrogen to be released and dissolved in the water to form hydrogen-rich water.

The fifth-stage filter layer is filled with microporous antibacterial balls 6, the microporous antibacterial balls 6 are microporous ceramic balls which are sintered at high temperature, and the microporous adsorption and self-polarization characteristics of natural mineral materials, the strong radiation far infrared performance and the antibacterial performance of composite antibacterial materials are utilized, so that the bacteria breeding and the microorganism growth can be inhibited.

The particle sizes of the terahertz ceramic ball 2, the microcrystal activation ball 3, the hydrogen-rich ceramic ball 5 and the micropore antibacterial ball 6 are 2-8 mm, and the particle size of the terahertz stone 4 is 5-8 mm, and the terahertz ceramic ball, the microcrystal activation ball, the hydrogen-rich ceramic ball and the micropore antibacterial ball can be directly purchased from the market.

As shown in fig. 1 and 2, in this embodiment, the water inlet end of the filter element is disposed on the upper end cap 18, the water outlet end is disposed on the lower end cap, and the five filter layers are arranged from top to bottom layer by layer. The direction of the arrows in the figure is the direction of the water flow. The filter element shell 1 of the filter element can be made of food-grade polypropylene materials.

The utility model discloses a five-stage filter layer has adopted the material that corresponds frequency (the vibration frequency number is 10 power of 12 Hz) with the water molecule, can take place resonance with the water molecule and make water quality active, the water molecule structure rearranges, can produce relatively stable little molecular water (41-46HZ), hydrogen-rich water (600ppb-1500ppb), weak alkaline water (pH value 7.3-8.5), negative potential water (-280-882 mv), active water, contain functions in the healthy water of an organic whole such as minerals (total hardness is 39mg/L ~ 52mg/L, degree of mineralization 90mg/L ~ 134mg/L), still have the antibacterial action that disinfects, the antibacterial rate reaches more than 99.2%, and the taste is sweet and smooth, its quality is closer to natural water source.

Example two

As shown in fig. 3 to 5, the present embodiment discloses a filter element, which is different from the first embodiment in that: the water inlet end 11 of the filter element is arranged on the side wall of the shell body 17 of the filter element shell 1, the water outlet end 12 is positioned at the central position of the lower end cover 19, the five stages of filter layers are annularly arranged from outside to inside, and the non-woven fabric 10 is laid between every two stages of filter layers. The direction of the arrows in the figure is the direction of the water flow.

As shown in fig. 6, the housing 17 of the filter element housing 1 is formed by compounding three layers of materials: the diatomite ceramic layer 13, the activated carbon layer 14 and the polypropylene fiber mesh 15 are compounded from outside to inside.

The diatomite ceramic layer 13 is made of natural diatomite ceramic, the diatomite ceramic is a siliceous material in the raw material and is diatomite, and the diatomite ceramic is microporous ceramic with low sintering degree and can permeate water. The numerous micropores in the surface of the ceramic layer 13 naturally form the water inlet end 11 for the water supply. The diatomite ceramic layer 13 can effectively intercept 0.2-0.5 micron particle impurities in water, including harmful substances such as rust, silt, suspended matters, bacteria, colloid and the like, has long service life and can be repeatedly cleaned and used.

The activated carbon layer 14 can be a graphene antibacterial composite activated carbon layer, can enhance removal of abnormal colors, peculiar smell, organic matters and residual chlorine in water, can effectively remove bacteria and viruses in water through graphene antibacterial fibers, and has an antibacterial rate of more than 96.6%.

The polypropylene fiber mesh 15 is mainly used for filtering particulate matters, mineral organic matters and the like in water, and the clarity of a water source is ensured.

The effect of the five-stage filter layer is the same as that of the first embodiment.

EXAMPLE III

As shown in fig. 7, the embodiment discloses a single-stage water purifier, which comprises an outer cylinder 7, an upper cover 8 and a filter element arranged inside the outer cylinder 7, wherein the upper cover 8 is installed above the outer cylinder 7 to seal the outer cylinder 7, a water inlet 71 is arranged above the side wall of the outer cylinder 7, a sewage outlet 72 is arranged at the lower part of the side wall of the outer cylinder 7, and a water purifying opening 73 is arranged at the bottom end of the outer cylinder 7. The filter element adopts the filter element of the second embodiment, namely five-stage filter layers of the filter element are annularly arranged from outside to inside, and the water outlet end 12 of the filter element is communicated with the water purifying port 73 at the bottom end of the outer barrel. The outer cylinder 7 is made of stainless steel material.

The water source flows into the outer cylinder 7 from the water inlet 71, enters from the water inlet end 11 of the side wall of the filter element, passes through the diatomite ceramic layer 13, and removes 0.2-0.5 micron particle impurities in the water; removing the heterochrosis, peculiar smell, organic matters and residual chlorine in the water through the activated carbon layer 14; the polypropylene fiber mesh 15 is used for further filtering out particles, mineral organic matters and the like in water. Then sequentially enters a five-level filter layer, so that the final water is healthy water integrating functions, such as small molecular water (41-46HZ), hydrogen-rich water (600ppb-1500ppb), weak alkaline water (pH value 7.3-8.5), negative potential water (-280-882 mv), active water, mineral-containing substances (total hardness is 39-52 mg/L, and mineralization degree is 90-134 mg/L). The finally obtained water flows out from the water purifying port 73 to a faucet and can be directly drunk by people. The foreign particles filtered by the filter element are discharged through the drain outlet 72. The other function of the drain 72 is to provide a back flush function, which can be used to drain water periodically to prolong the life of the filter element.

Example four

The embodiment discloses a multistage water purifier, includes four grades of cartridge filters or five grades of cartridge filters from the water inlet to the delivery port and establishes ties in proper order.

As shown in fig. 8, a PP cotton composite carbon filter element is disposed in the first-stage filter cartridge 91, a graphene antibacterial filter element is disposed in the second-stage filter cartridge 92, a hollow ultrafiltration membrane filter element is disposed in the third-stage filter cartridge 93, and the filter element of the first embodiment is disposed in the fourth-stage filter cartridge 94. In this embodiment, the filter further includes a fifth-stage filter cartridge 95 connected in series to the fourth-stage filter cartridge 94, and a nano-scale antibacterial filter element is disposed in the fifth-stage filter cartridge 95. In other embodiments, only the front four stage filter cartridge may be provided. The addition of the fifth stage cartridge filter 95 further improves the antimicrobial efficiency.

The cartridge housing of each stage of filter cartridge is made of stainless steel, typically 304 or 316 stainless steel. As shown in FIG. 2, the filter element housing 1 of the fourth stage filter cartridge 94 is made of food grade polypropylene material, the water inlet end 11 is disposed at the upper end of the filter element housing, the water outlet end 12 is disposed at the lower end of the filter element housing 1, and the five filter layers are arranged layer by layer from top to bottom.

The arrow point direction in the picture is the rivers direction, and the water source is at first through the cotton compound carbon filter core of PP, and it has the cotton and sintering activated carbon layer of high density PP to the intussuseption to fill in the cotton compound carbon filter core of PP, and the tight gradient is filtered in the outer elasticity, can effectively intercept the large granule impurity of aquatic, including iron rust, silt suspended solid to and the heterochrosis in the running water, peculiar smell, chlorine residue etc. play the guard action to second stage cartridge filter 92. The water source enters the graphene antibacterial filter element for filtration, so that the heterochrosis, peculiar smell, organic matters and residual chlorine in the water can be further removed, bacteria and viruses in the water can be effectively removed through the graphene fibers, and the antibacterial rate is over 96 percent. The water source enters a hollow ultrafiltration membrane filter element, the filtration precision of the membrane filaments layer by layer can reach 0.01 micron, and harmful substances such as bacteria, viruses, colloids and the like in the water are removed with strong force. The impurity particles left after the first three-stage filtration are discharged through a sewage discharge outlet 72. The water after tertiary filtration gets into before the utility model discloses a filter core loops through terahertz ceramics ball 2, micrite activation ball 3, terahertz stone 4, rich hydrogen ceramic ball 5, micropore antibiotic ball 6 now. Because the filter element of the utility model adopts the material with the corresponding frequency of the water molecule (the vibration frequency is 10 Hz of 12 times), the water molecule can resonate with the water molecule to activate the water quality, and the water molecule structure is rearranged, thereby producing the healthy water which is closer to the natural water source. The purified water source finally enters the nano-scale antibacterial filter element of the fifth-stage filter cylinder 95, the turbidity of the water can be further reduced, the taste degree of the water is improved, the taste of the natural water is restored, the harmful substances in the water are removed again through the nano-scale antibacterial filter material, the antibacterial rate reaches more than 99.2 percent, and the direct drinking of the discharged water is realized.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims

1. A filter cartridge, comprising: the filter element shell and five stages of filter layers are arranged in the filter element shell in sequence from the water inlet end to the water outlet end; the first-stage filter layer is filled with terahertz ceramic balls, the second-stage filter layer is filled with microcrystal activation balls, the third-stage filter layer is filled with terahertz stones, the fourth-stage filter layer is filled with hydrogen-rich ceramic balls, and the fifth-stage filter layer is filled with microporous antibacterial balls.

2. The filter cartridge of claim 1, wherein the cartridge housing comprises a housing, an upper end cap and a lower end cap, the upper end cap and the lower end cap being respectively enclosed at the upper end and the lower end of the housing; the lower end cover is provided with a PP cotton pad, and every two filter layers are separated by non-woven fabrics.

3. The filter element of claim 2, wherein the water inlet end is disposed on the upper end cap, the water outlet end is disposed on the lower end cap, and the five filter layers are arranged from top to bottom in a layer-by-layer manner.

4. The filter element of claim 2, wherein the water inlet end is arranged on the side wall of the shell of the filter element shell, the water outlet end is positioned in the center of the lower end cover, and the five-stage filter layers are annularly arranged from outside to inside.

5. The filter element of claim 1, wherein the particle size of the terahertz stone is 5-8 mm, and the particle size of the terahertz ceramic ball, the microcrystalline activation ball, the hydrogen-rich ceramic ball and the microporous antibacterial ball is 2-8 mm.

6. A single-stage water purifier is characterized by comprising an outer barrel, an upper cover and a filter element arranged in the outer barrel, wherein the upper cover is arranged above the outer barrel and used for sealing the outer barrel, a water inlet is formed in the upper part of the side wall of the outer barrel, a sewage discharge outlet is formed in the lower part of the side wall of the outer barrel, a water purifying opening is formed in the bottom end of the outer barrel, the filter element is the filter element according to any one of claims 1-5, and the water outlet end of the filter element is communicated with the water purifying opening in the bottom end of the outer barrel.

7. The single-stage water purifier of claim 6, wherein the water inlet end of the filter element is arranged on the side wall of the filter element shell, the water outlet end is arranged at the center of the bottom of the filter element shell, and the five-stage filter layers are annularly arranged from outside to inside; the filter element shell consists of a diatom ceramic layer, an active carbon layer and a polypropylene fiber mesh from outside to inside, and the outer cylinder is made of stainless steel materials.

8. The utility model provides a multistage water purifier which characterized in that includes that a plurality of grades of cartridge filters establish ties in proper order from water inlet to delivery port: a PP cotton composite carbon filter element is arranged in the first-stage filter cartridge, a graphene antibacterial filter element is arranged in the second-stage filter cartridge, a hollow ultrafiltration membrane filter element is arranged in the third-stage filter cartridge, and the filter element as claimed in any one of claims 1 to 5 is arranged in the fourth-stage filter cartridge.

9. The multi-stage water purifier of claim 8, further comprising a fifth stage filter cartridge connected in series to the fourth stage filter cartridge, wherein the fifth stage filter cartridge has a nano-sized antimicrobial filter element disposed therein.

10. The multi-stage water purifier as claimed in claim 9, wherein the cartridge housing of each stage of the filter cartridge is made of stainless steel, the filter element housing of the fourth stage of the filter cartridge is made of food grade polypropylene, the water inlet end is disposed at the upper end of the filter element housing, the water outlet end is disposed at the lower end of the filter element housing, and the five stages of the filter layers are arranged from top to bottom layer by layer.