Filter for removing PFAS

Abstract

The present invention relates to a filter for removing PFAS, and more specifically, to a filter for removing PFAS, which has the ability to remove artificially synthesized organic compounds and carcinogenic chemical substances contained in raw water. The present invention relates to a filter for water purification, which comprises a filter housing having an inflow part for supplying raw water and an outflow part for purifying the supplied raw water and then discharging the purified raw water, and which is attached to a water purifier, the filter comprising: a filter part (200) which is formed in a cylindrical shape and is inserted into the filter housing (100); the present invention is provided with: an external carbon filter (210) for removing volatile organic compounds and heavy metals contained in raw water supplied to an inflow part (130); an antiviral filter (220) and a post-carbon filter (230) having the ability to remove bacteria; a PFAS removal bead (240) that inhibits artificially synthesized organic compounds and carcinogenic chemicals between an outflow passage (250) and an outflow section (331) of the post-carbon filter (230); and a filter cover section (300) comprising an upper cover (310) provided at one end of the filter section (200), a lower cover (330) having an outflow section (331) provided at the other end, and an inner lower cover (320) provided at one end of the filter section (200).

Description

TECHNICAL FIELD

[0001] The present application relates to a filter for PFAS removal, and more particularly, to a filter for PFAS removal having the ability to remove artificially synthesized organic compounds and carcinogenic chemicals PFAS contained in raw water. BACKGROUND

[0002] Recently, there is an increasing concern about the safety and health of tap water quality, and there is a need to remove various harmful substances.

[0003] Fluorine-containing organic compounds are used for various purposes such as surfactants, emulsifiers, waterproofing agents, fire extinguishing agents, waxes, carpet cleaners, and coating agents, due to their unique properties (excellent heat resistance, drug resistance, use under severe conditions, non-light absorption, etc.) that cannot be achieved by other substances. Recently, their use as functional materials such as surface treatment agents for semiconductors or fuel cell constituent materials has also been increasing.

[0004] However, since several years ago, researchers in the United States and Canada have reported the accumulation of some fluorine-containing organic compounds in environmental water or wild organisms. Typical examples are perfluoroalkyl carboxylic acid compounds represented by perfluorooctanoic acid (PFOA: C7F15COOH), or perfluoroalkyl sulfonic acid compounds represented by perfluorooctane sulfonic acid (PFOS: C8F17SO3H). Thereafter, researchers in Europe and Japan have also conducted environmental analysis research, confirming that these compounds exist in the environment worldwide, including Japan. In view of this situation, measures have been taken to reduce the environmental risk of fluorine-containing organic compounds (perfluoroalkyl compounds and polyfluoroalkyl compounds, hereinafter referred to as "PFAS").

[0005] For example, a method is reported in which activated carbon in which particles passing through a 75 μm filter account for 90% or more of the total particles is brought into contact with a treatment target water containing a fluorine-containing surfactant, thereby removing the fluorine-containing surfactant from the treatment target water.

[0006] However, so far, there have been reports on the use of activated carbon to remove fluorine-containing organic compounds from water. However, these technologies are mainly for batch processing purposes (such as the treatment and purification of factory wastewater). The technologies reported so far are methods for batch processing purposes or for removing PFAS from raw water (river water, etc.) at water purification plants, etc., and there has been little progress in schemes for removing fluorine-containing organic compounds by water purifiers, etc.

[0007] In the treatment at water purification plants, etc. and the treatment based on water purifiers, the water as the treatment target is different (raw water and tap water), and the treatment time of the treatment target water also differs greatly, so the PFAS removal scheme for water purification plants cannot be directly applied to, for example, household water purifiers, etc.

[0008] Recently, a woman who had lived in the Tama area, a suburb of Tokyo, for over 40 years was shocked after undergoing a blood test. The reason was the unusually high concentration of PFAS, a synthetic compound that has recently garnered attention for its harmful effects. PFAS is a collective term for over 4,700 synthetic fluorinated organic compounds, such as perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA).

[0009] Because it is difficult to break down and continues to accumulate in the body, it is also known as "zombie compound". As a harmful substance that may induce kidney cancer or hinder children's development, it has attracted much attention since the 2000s. A research team from a graduate school conducted blood tests on 650 residents in the Tama area. The results showed that the level was more than 2.4 times the national average in a survey two years ago, which shows the severity of the problem.

[0010] In addition, PFAS are known to be found in the manufacture of dyeing, coating, fire protection-related products, U.S. military materials, and semiconductor manufacturing processes. Summary of the Invention

[0011] Technical problems to be solved

[0012] Therefore, the main objective of this invention is to provide a water filter that can also be used in water purifiers and has excellent PFAS (PFOS, PFOA, etc.) removal performance.

[0013] The purpose of this invention is to stably utilize raw water (untreated water) that is exposed to pollutants such as germs, bacteria, and viruses and has a high probability of being contaminated, and to provide high-quality purified water that removes synthetic organic compounds and carcinogenic chemicals contained in the raw water, collectively referred to as PFAS.

[0014] In addition, in this invention, the structure of PFAS inserted into the cylinder in the form of a cylindrical or teabag serves as the shaft supporting the filter section, and purified water is provided by mixing with polyphosphate or activated carbon to form a pore structure.

[0015] Technical solution

[0016] In this invention, a water purification filter, which includes a filter housing having an inlet portion for supplying raw water and an outlet portion for purifying and discharging the supplied raw water, and is installed in a water purifier, comprises:

[0017] The filter section, which is formed in a cylindrical shape and inserted into the filter housing, includes: an external carbon filter that removes volatile organic compounds and heavy metals contained in the raw water supplied to the inflow section, an antiviral filter that has the ability to remove bacteria, and a post-carbon filter.

[0018] PFAS removal beads, located between the outflow passage and the outflow section of the post-carbon filter, inhibit synthetic organic compounds and carcinogenic chemicals; and

[0019] The filter cover includes: an upper cover disposed at one end of the filter, a lower cover having an outlet disposed at the other end, and an inner lower cover disposed at one end of the filter.

[0020] The filter section includes: an external carbon filter located in the inner diameter of the supply passage, and disposed in the carbon filter mounting hole in the inner diameter of the external carbon filter;

[0021] An antiviral filter is disposed within the filter housing orifice of the external carbon filter;

[0022] A post-carbon filter is disposed in the rear-mounted hole of the inner diameter of the antiviral filter; and a PFAS removal bead is disposed between the outflow passage and the outflow portion of the post-carbon filter.

[0023] The PFAS removal beads are inserted between the outflow passage and the outflow section of the post-carbon filter and are supported from below by the inner lower cover.

[0024] In the filter cover, the inner lower cover and the inner cover are combined, and a particulate matter removal filter is also provided on the lower side of the inner lower cover and at the filter setting groove of the inner diameter of the inner cover.

[0025] The filter cover includes: an upper cover with a filter fixing protrusion protruding from the lower center of the cover, which fixes the rear carbon filter and is combined with the upper side and outer diameter of the particulate matter removal filter;

[0026] An inner lower cover, which is joined to the lower side and outer diameter of the particulate matter removal filter; and

[0027] The lower cover is combined with the inner lower cover, and an outlet is formed on the lower side.

[0028] The PFAS removal beads are made of corn starch or corn kernels, which are mixed with polyphosphate or activated carbon to form pores.

[0029] The lower inner cover has an internal groove with a fixing protrusion, and a cover fixing claw is formed on the outer diameter of the internal groove, which is connected to the rear PFAS removal filter. The interior includes an internal reinforcing platform for connecting the filter section.

[0030] Beneficial effects

[0031] The PFAS removal filter of the present invention, as described above, can inhibit the formation of scale caused by hard substances such as lime, and remove synthetic organic compounds and carcinogenic chemical substances PFAS, thereby solving a variety of problems caused therefrom.

[0032] In addition, the positively charged filter located inside the carbon filter has the ability to remove viruses (including microorganisms), which can prevent the ultrafine filter from being contaminated by viruses.

[0033] In addition, the two ends of the ultrafine filter are fixed by the filter cover. The passageway inside the cylinder is formed by inserting the PFAS package in the form of beads, which serves as the shaft to support the filter section and stably play the core role of the filter section.

[0034] In addition, corn powder or granules, which are substances for removing PFAS, are mixed with polyphosphates or activated carbon to form pores of various shapes, thereby providing an effect that improves the removal capacity of PFAS. Attached Figure Description

[0035] Figure 1 This is a perspective view of the water purification filter used in the present invention and the prior art;

[0036] Figure 2 This is a partially exploded perspective view of the water purification filter used in this invention;

[0037] Figure 3 This is a cross-sectional view showing a preferred embodiment of the water purifier with the ability to inhibit scale formation and remove PFAS.

[0038] Figure 4 This is for the present invention Figure 3 Front cross-sectional view of line AA;

[0039] Figure 5 This is an enlarged cross-sectional view of the upper part of the water purification filter of the present invention;

[0040] Figure 6 This is an enlarged cross-sectional view of the lower part of the water purification filter of the present invention;

[0041] Figure 7 This is an exploded cross-sectional view of the filter section in the water purification filter of the present invention;

[0042] Figure 8 This is a perspective view of the filter section in the water purification filter of the present invention;

[0043] Figure 9 This is an exploded perspective view of the filter section in the water purification filter of the present invention;

[0044] Figure 10 This is a cross-sectional perspective view showing the installation state of the filter in the filter section of the present invention;

[0045] Figure 11 This is an exploded perspective view of the main part of the PFAS removal beads of the present invention;

[0046] Figure 12 This is an exploded perspective view of the bottom surface of the main part of the filter section of the present invention;

[0047] Figure 13 This is a cross-sectional view showing the installation state of the filter section of the present invention;

[0048] Figure 14 This is for the present invention Figure 14 Front cross-sectional view of the BB line;

[0049] Figure 15 This is a planar cross-sectional view of the state in which the PFAS removal beads of the present invention are provided;

[0050] Figure 16 This is an enlarged cross-sectional view of the main part in which the PFAS removal beads of the present invention are provided;

[0051] Figure 17 This is a planar cross-sectional view of the setup state of the post-PFAS removal filter of the present invention;

[0052] Figure 18 This is a front cross-sectional view of the setup state of the post-PFAS removal filter of the present invention;

[0053] Explanation of reference numerals in the attached figures

[0054] F: Water purification filter 100: Filter housing

[0055] 110: Casing body 120: Casing cover

[0056] 130: Inflow section; 140: Supply channel

[0057] 200: Filter section; 210: External carbon filter

[0058] 220: Antiviral filter; 230: Post-carbon filter

[0059] 240: PFAS removal beads; 245: Post-PFAS removal filter

[0060] 250: Outflow path 280: Removal filter

[0061] 281: PFAS removes substances 300: Filter cover

[0062] 310: Top cover; 311: Filter fixing protrusion

[0063] 320: Lower inner cover; 321: Phosphate bead fixing protrusion.

[0064] 322: Cover retaining claw; 323: Internal groove

[0065] 324: Internal reinforcement platform; 330: Lower cover

[0066] 331: Outflow section; 332: Filter setting slot Detailed Implementation

[0067] To fully understand the present invention, preferred embodiments are described with reference to the accompanying drawings. The embodiments of the present invention can be varied in many ways, and the scope of the present invention should not be construed as limited to the embodiments described in the following detailed description. These embodiments are provided to provide a more comprehensive explanation of the present invention to those skilled in the art. Therefore, the shapes of elements in the drawings may be exaggerated for emphasis. It should be noted that the same parts may be shown with the same reference numerals in different drawings. Detailed descriptions of well-known functions and configurations that are thought to potentially obscure the essence of the present invention are omitted.

[0068] This invention, as a water purifier filter installed in a water purifier, has the ability to suppress the formation of scale caused by hard substances such as lime in the raw water, and the ability to remove PFAS contained in the raw water.

[0069] In this invention, "corn (Zea mays L.)" refers to powder or granules obtained from corn kernels. As a tropical crop belonging to the Poaceae family, corn is used not only as food but also as a traditional Chinese medicine in the East. Medicinally, corn roots and leaves are used to treat urinary incontinence and pain caused by stones. Furthermore, corn bran or silks contain physiologically active components such as ferulic acid, coumaric acid, N,N-diferuloylputrescine, N,N-dicoumaroylputrescine, carotenoids, phytosterols, corn fiber, and maysin, exhibiting anticancer, antihypertensive, antidiabetic, antioxidant, anti-obesity, and anti-aging activities.

[0070] The present invention relates to a PFAS removal filter, which is used as a water purification filter installed in a water purifier. It can inhibit the formation of scale caused by hard substances and lime in the raw water, and remove synthetic organic compounds and carcinogenic chemicals, ultimately enabling the filter to remove PFAS.

[0071] Scale buildup in water purifiers typically occurs at the rear of the hot water module, clogging the product's flow path, reducing hot water flow, and causing problems such as excessive valve malfunctions and suction noise.

[0072] A more detailed description will be given with reference to the accompanying drawings illustrating an embodiment of the filter for PFAS removal according to the present invention.

[0073] Reference Figures 2 to 6 ,

[0074] The water purifier F with PFAS removal capability of the present invention generally includes: a filter housing 100, which is a hollow cylindrical shape, with the upper part closed in the figure and the lower end protruding outward to form an inlet 130 for supplying raw water; a filter section 200, which is built into the inner hollow part of the filter housing 100, so that the raw water flowing into the inlet 130 passes from the outside of the supply passage 140 to the inside and is purified; and a cover 300, which has an upper cover 310 disposed on the upper side of the two ends of the filter section 200, an inner lower cover 320 disposed on the lower side, and a lower cover 330.

[0075] The filter housing 100 has an inner hollow portion that can house a filter cover portion 300 and a filter portion 200, both of which have an upper cover 310 and a lower cover 330 at their ends. It also includes a housing body 110, which has an inlet portion 130 on one side for receiving raw water, and a housing cover 120, which is attached to the housing body 110. It is constructed using known methods.

[0076] The filter section 200 includes polyphosphate and positive charge filters, thereby having the ability to inhibit the formation of scale caused by hard substances and lime, as well as the ability to remove viruses (including microorganisms).

[0077] The filter section 200 includes: a particulate matter removal filter 212, which is made of non-woven fabric that removes particulate matter from the raw water flowing into the inlet section 130; an external carbon filter 210, which is formed in the central carbon filter mounting hole 213 of the particulate matter removal filter 212; an antiviral filter 220, which is formed in the central filter mounting hole 211 of the external carbon filter 210 and has virus removal capability; and a post-carbon filter 230, which is formed in the central post-mounted mounting hole 221 of the antiviral filter 220 and has a central axis function.

[0078] The filter section 20 includes a PFAS removal bead 240, which is inserted below the central outflow passage 250 of the post-carbon filter 230, and is used to remove synthetic organic compounds and carcinogenic chemicals.

[0079] Typically, the particulate matter removal filter 212, the external carbon filter 210, the antiviral filter 220, and the post-carbon filter 230 gradually decrease in size from the outer diameter to the inner diameter, forming a hollow tube shape that is layered together.

[0080] Preferably, the particulate matter removal filter 212, the external carbon filter 210, the antiviral filter 220, and the post-carbon filter 230 are typically concentric circles and assembled to form a cylindrical shape.

[0081] The particulate matter removal filter 212 is made of non-woven fabric and is supplied from the supply passage 140 to the inlet 130 in a circumferential direction with raw water. It initially removes larger particulate matter in the raw water and reduces turbidity.

[0082] The particulate matter removal filter 212 has an inner diameter including a carbon filter mounting hole 213 and is formed in the form of a hollow tube. In the figure, the upper end is provided with an upper cover 310 and is sealed, and the lower end is provided with a lower cover 330 with an outlet 331. The raw water flowing into the inlet 130 flows inward from the supply passage 140 in the circumferential direction, and circulates and is purified by passing through the outlet passage 250 and the outlet 331.

[0083] As is well known, the external carbon filter 210 and the post-carbon filter 230 have the ability to remove volatile organic compounds (VOCs), lead (Pb), and heavy metals contained in the raw water.

[0084] The external carbon filter 210 is disposed in the inner diameter carbon filter housing hole 213 of the particulate matter removal filter 212, and is doubly combined in a cylindrical shape with different sizes to remove volatile organic compounds (VOCs), lead (Pb) and heavy metals contained in the raw water initially filtered in the particulate matter removal filter 212.

[0085] An antiviral filter 220 is inserted into the inner diameter filter housing hole 211 of the external carbon filter 210 to remove viral components contained in the purified water filtered in the external carbon filter 210. It prevents the internal post-carbon filter 230 from being contaminated by viruses and the resulting viral proliferation, thus preventing the generation of viruses within the filter section 200.

[0086] The antiviral filter 220 is formed by winding between the external carbon filter 210, which has filter placement holes 211 formed in the inner diameter, and the post-carbon filter 230, in a state where it is formed with a set thickness, thereby forming a zigzag folded shape. Figure 4 It is a cylindrical shape (of shape 220) that has a "W" shape when viewed from a flat surface.

[0087] Pollutants such as germs, bacteria, and viruses in water usually carry a negative charge. The antiviral filter 220 effectively adsorbs and removes pollutants containing such negatively charged viruses, thereby purifying water by removing viral components.

[0088] The post-carbon filter 230 is inserted into the rear-mounted hole 221 of the inner diameter of the antiviral filter 220, filters the purified water filtered by the antiviral filter 220, and supplies it to the outflow passage 250 of the inner diameter.

[0089] The post-carbon filter 230 is cylindrical in shape. At both ends, the upper end is connected to the filter fixing protrusion 311 of the upper cover 211, and the lower end is supported by the phosphate bead fixing protrusion 321 of the inner lower cover 320, thereby providing a firm fixation on both sides and playing a stable and solid core role in the filter section 200.

[0090] The PFAS removal bead 240, located on the lower side of the outflow passage 250, removes synthetic organic compounds and carcinogenic chemicals between the outflow passage 250 and the outflow section 331 of the post-carbon filter 230. It is formed in the form of a box and can be used to insert and store corn powder or corn kernels.

[0091] Such PFAS removal beads 240 remove synthetic organic compounds and carcinogenic chemicals caused by PFAS from purified water filtered by post-carbon filter 230.

[0092] The corn powder or corn kernels supplied to the PFAS removal beads 240 are made of a material with the ability to remove PFAS contained in purified water.

[0093] The corn powder meets the conditions shown in Table 1 below, and the corn kernels meet the conditions shown in Table 2 below.

[0094] [Table 1] Corn Meal

[0095] Structure Specification Bulk (Density) 0.55 kg / L (34.3 lbs / ft3) Effective Size 50 to 220 μm Thermal Stability 300℃(572°F) Moisture Content 8～12％

[0096] [Table 2] Corn kernels

[0097] The PFAS removal beads 240 can be molded in powder or granular form, have many pores, and can be mixed with polyphosphate or activated carbon. If processed above 200°C, they will lose their functionality due to carbonization. Therefore, they are molded at temperatures below 200°C.

[0098] When using the PFAS removal beads 240 or the post-carbon filter 230, they can be formed in powder or granular form with pores, or mixed with polyphosphate or activated carbon. Alternatively, they can be formed in powder or granular form on the inner or outer diameter of the post-carbon filter 230. Phosphate beads can be used instead of PFAS removal beads 240, or they can be attached as separate boxes to any part of the outflow passage 250 formed on the upper side of the PFAS removal beads 240. The PFAS removal beads 240 can be in the form of a perforated box, or in the form of a pocket made of materials such as gauze or cloth, and can be implemented in boxes with various designs and shapes.

[0099] The filter cover 300 includes: an upper cover 310 disposed on the upper side of the filter 200 and locked; a lower cover 330 having an outlet 331 disposed on the lower side; and an inner lower cover 320.

[0100] The upper cover 310 can be disposed on the upper side of the filter section 200 in the figure, locking the upper side of the filter section 200 and separating the filter housing 100 including the supply passage 140 and the raw water. The filter housing 100 can receive the supplied raw water from the outside and supply it to the supply passage 140. The filter section 200 can move the raw water supplied to the supply passage 140 from the particulate matter removal filter 212 toward the central outflow passage 250 and purify the water.

[0101] The upper cover 310 has a filter fixing protrusion 311 protruding from the center of the interior towards the lower side. The rear carbon filter 230 can be embedded in the inner diameter or the outer diameter and maintained in a fixed state, thereby enabling the rear carbon filter 230 to be stably maintained in a fixed state.

[0102] The lower cover 330 is disposed on the lower side of the filter section 200 in the figure, and is combined with the inner lower cover 320 on the upper side, and is configured as an integral part, with the filter section 200 combined on the upper side of the inner lower cover 320.

[0103] The lower cover 330 forms an outlet 331 from the center downwards, which is connected to the outlet passage 250 and can receive and supply clean water. In the upward direction, the interior is formed with filter grooves 332 with lower reinforcing platforms at certain intervals in the circumferential direction, and a particulate matter removal filter 280 is provided. Fixed protrusions 333 are formed twice in the outer diameter direction.

[0104] The lower inner cover 320 has a groove formed on the lower side, which can support and fix the particulate matter removal filter 280 on both sides together with the filter setting groove 332. An inner groove 323 is formed in the inner direction of the double fixing protrusions 333 in the outer diameter direction. A cover fixing claw 322 is formed at the outer front end. An inner reinforcing platform 324 is provided at a certain interval in the circumferential direction on the upper inner side to support the lower side of the filter part 200.

[0105] The lower inner cover 320 has a central through-hole and a phosphate bead fixing protrusion 321 protruding upwards, which can support the lower side of the PFAS removal bead 240 and fix the lower side of the post-carbon filter 230 in conjunction with the inner or outer diameter, thereby stably maintaining the post-filtering function of the filter section 200 passing through the post-carbon filter 230.

[0106] As mentioned above Figure 6 and Figure 7 as well as Figure 9 As shown, the upper part of the filter 280 is coated with a PFAS removal material 281 of a set thickness. The PFAS removal material 281 is formed by mixing corn powder and corn kernels, along with polyphosphate or activated carbon, thereby forming a PFAS removal capability composed of synthetic organic compounds or carcinogenic chemicals.

[0107] On the other hand, as shown in Figures 19 and 20, since the area of ​​the PFAS removal beads 240 that are supplied and in contact with the purified water is relatively small, there is a possibility of low removal capacity. Therefore, when the PFAS removal beads 240 are installed or not used, the post-carbon filter 230 is removed, and a post-PFAS removal filter 245 is installed by mixing any one of corn powder and corn kernels with polyphosphate or activated carbon, thereby forming a filter with the ability to remove PFAS composed of artificially synthesized organic compounds or carcinogenic chemicals.

[0108] In the post-PFAS removal filter 245, the corn powder or corn kernels are formed at a temperature below 200°C during the forming process.

[0109] Therefore, it should be fully understood that the present invention is not limited to the forms described in the foregoing specification. The true scope of protection of the present invention should be defined by the technical concept of the appended claims.

[0110] Furthermore, it should be understood that the present invention includes all variations, equivalents, and alternatives within the scope of the concept of the invention as defined in the claims.

[0111] Industrial utilization potential

[0112] The water purifier of the present invention, which has the ability to inhibit scale formation and remove PFAS, can solve the scale problem caused by hard substances in farmers and other households that use raw water supplied with tap water, and can be widely used.

[0113] In addition, raw water may be contaminated by exposure to pollutants such as pathogens, bacteria and viruses, as well as by synthetic organic compounds and carcinogenic chemicals. As mentioned above, this invention provides a very practical solution that can remove common pollutants such as pathogens, bacteria, viruses or PFAS and carcinogenic pollutants, thereby enabling the safe use of raw water and allowing for its widespread application.

Claims

1. A filter for PFAS removal, wherein, A water purification filter, which includes a filter housing having an inlet section for supplying water and an outlet section for purifying and discharging the supplied raw water, and is installed in a water purifier, comprises: The filter section (200) is formed in a cylindrical shape and inserted into the filter housing (100), and includes: an external carbon filter (210) that removes volatile organic compounds and heavy metals contained in the raw water supplied to the inlet section (130), an antiviral filter (220) that has the ability to remove bacteria, and a post-carbon filter (230). PFAS removal beads (240) between the outflow passage (250) and the outflow section (331) of the post-carbon filter (230) inhibit synthetic organic compounds and carcinogenic chemicals. The filter cover (300) includes: an upper cover (310) disposed at one end of the filter (200), a lower cover (330) having an outlet (331) disposed at the other end, and an inner lower cover (320) disposed at one end of the filter (200).

2. The filter for PFAS removal according to claim 1, wherein, The filter section (200) includes: An external carbon filter (210) is located in the inner diameter of the supply passage (140) and is provided in the carbon filter mounting hole (213) in the inner diameter of the external carbon filter (210). An antiviral filter (220) is disposed in the inner diameter filter housing hole (211) of the external carbon filter (210); A post-carbon filter (230) is disposed in the rear-mounted port (221) of the inner diameter of the antiviral filter (220); and PFAS removal beads (240) are disposed between the outflow passage (250) and the outflow section (331) of the post-carbon filter (230).

3. The filter for PFAS removal according to claim 1, wherein, The PFAS removal bead (240) is inserted between the outflow passage (250) and the outflow portion (331) of the post-carbon filter (230) and is supported from below by the inner lower cover (320).

4. The filter for PFAS removal according to claim 1, wherein, In the filter cover (300), the inner lower cover (320) and the lower cover (330) are combined, and a particulate matter removal filter (280) is also provided on the lower side of the inner lower cover (320) and at the inner diameter filter setting groove (332) of the lower cover (330).

5. The filter for PFAS removal according to claim 1, wherein, The filter cover (300) includes: The upper cover (310) has a filter fixing protrusion (311) protruding from the lower center, which fixes the rear carbon filter (230) and is combined with the upper side and outer diameter of the particulate matter removal filter (212). An inner lower cover (320) is attached to the lower side and outer diameter of the particulate matter removal filter (212); and The lower cover (330) is combined with the inner lower cover (320), and an outlet (331) is formed on the lower side.

6. The filter for PFAS removal according to claim 3, wherein, The PFAS removal beads (240) are made of corn starch or corn kernels, which are mixed with polyphosphate or activated carbon to form pores.

7. The filter for PFAS removal according to claim 5, wherein, The lower inner cover (320) forms an inner groove (323) for the fixing protrusion (333), and a cover fixing claw (322) is formed on the outer diameter of the inner groove (323) and is connected to the rear PFAS removal filter (245). The inner part includes an inner reinforcing platform 324 for the filter part (200).

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