Filter for PFAS removal

Abstract

The present invention relates to a filter for PFAS removal and, more specifically, to a filter for PFAS removal configured to have the ability to remove artificially created organic compounds and carcinogenic chemicals (PFAS) from raw water. The present invention relates to a water purification filter comprising a filter housing having an inlet portion through which raw water is supplied and an outlet portion through which purified raw water is discharged. The water purification filter is installed in a water purifier and comprises: a filter unit (200) inserted and installed in a filter housing (100), the filter unit (200) having a cylindrical shape and comprising an external carbon filter (210) for removing volatile organic compounds and heavy metals from the raw water supplied through the inlet portion (130), an antivirus filter (220) capable of removing bacteria, and a post-carbon filter (230); PFAS removal beads (240) positioned between the outlet passage (250) of the post-carbon filter (230) and the outlet portion (331) to suppress artificially created organic compounds and carcinogenic chemicals; and a filter cover unit (300) comprising an upper cover (310) installed at one end of the filter unit (200), a lower cover (330) having an outlet portion (331) installed at the other end, and an internal lower cover (320) installed at one end of the filter unit (200).

Description

Filter for removing Fipas

[0001] The present invention relates to a filter for removing PFAS, and more particularly, to a filter for removing PFAS that has the ability to remove PFAS, an artificially created organic compound and a carcinogenic chemical substance contained in raw water.

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

[0003] Fluorinated organic compounds possess unique properties (such as heat resistance, excellent chemical resistance, usability under harsh conditions, and lack of light absorption) that cannot be achieved with other substances. Therefore, they have been utilized in a variety of applications, including as surfactants, emulsifiers, water repellents, fire extinguishers, waxes, carpet cleaners, and coatings. Recently, their use as functional materials, such as surface treatment agents for semiconductors and fuel cell components, has been increasing.

[0004] However, several years ago, researchers in the United States and Canada began reporting that some fluorinated organic compounds were accumulating in environmental waters and wildlife. Typical examples include perfluoroalkylcarboxylic acids, such as perfluorooctanoic acid (PFOA: C7F15COOH), and perfluoroalkylsulfonic acids, such as perfluorooctanesulfonic acid (PFOS: C8F17SO3H). Subsequently, researchers in Europe and Japan also began conducting environmental analysis studies, revealing that these compounds exist in the environment worldwide, including in Japan. Recognizing this situation, efforts are being made to reduce the environmental risks of fluorinated organic compounds (perfluoroalkyl compounds and polyfluoroalkyl compounds; hereinafter referred to as "PFOS").

[0005] For example, a method for removing a fluorinated surfactant from water to be treated is reported by bringing the water to be treated containing the fluorinated surfactant into contact with activated carbon, in which particles passing through a 75 ㎛ filter account for more than 90% of the total particles.

[0006] However, there have been reports on the use of activated carbon to remove fluorinated organic compounds from water. However, these technologies are primarily used in batch applications (e.g., treatment and purification of factory wastewater). The technologies reported so far are methods for removing fluorinated organic compounds from raw water (e.g., river water) in batch applications or water purification plants. Currently, little research has been conducted on methods for removing fluorinated organic compounds using water purifiers.

[0007] In treatment at water purification plants and treatment by water purifiers, the water to be treated is different (raw water and tap water), and the treatment time for the water to be treated is also significantly different, so the means for removing P-P-A in water purification plants cannot be directly applied to, for example, household water purifiers.

[0008] A woman who has lived in the Tama area outside Tokyo for over 40 years was shocked after a recent blood test. Her blood levels of PFAS, a man-made chemical whose harmful effects have recently been highlighted, were quite high. PFAS is a general term for man-made organic fluorine compounds, of which there are over 4,700, including PFOS and PFOA.

[0009] It is a substance that has been receiving attention since the 2000s as a harmful substance that does not break down easily and continues to accumulate in the body, and can cause kidney cancer or stunt the growth of children. It is a problem that a graduate school research team conducted a blood test on 650 residents of the Tama area and found that the level was 2.4 times higher than the national average from a survey two years ago.

[0010] And Pipas is known to appear during the manufacturing of dyeing, coating, fire-fighting products, US military equipment, and semiconductor manufacturing processes.

[0011] Therefore, the main task of the present invention is to provide a water purification filter having excellent PFOS (PFOS, PFOA, etc.) removal performance that can also be used for water purification purposes.

[0012] The present invention aims to enable the stable use of raw water (untreated water) that is highly likely to be contaminated by exposure to contaminants such as germs, bacteria, and viruses, and to provide high-quality purified water by removing artificially created organic compounds and carcinogenic chemicals, a general term for P-Phases, contained in raw water.

[0013] In addition, in the present invention, the filter part is used as an axis supporting the filter part through a configuration in which the pipas is inserted into a passage inside the cylinder in a cylindrical or tea bag shape, and purified water is provided through a structure in which pores are formed by mixing with polyphosphate or activated carbon.

[0014] The present invention relates to a water purification filter mounted on a water purifier, including a filter housing having an inlet through which raw water is supplied and an outlet through which the supplied raw water is purified and discharged.

[0015] A cylindrical filter unit that is inserted and installed inside the filter housing and includes an external carbon filter that removes volatile organic compounds and heavy metals contained in raw water supplied to the inlet, an anti-virus filter that has the ability to remove bacteria, and a post-carbon filter;

[0016] A bead for removing PIPAS that suppresses artificially created organic compounds and carcinogenic chemicals between the outlet passage and outlet of the above post carbon filter;

[0017] It includes a filter cover part comprising an upper cover installed at one end of the filter part, a lower cover having an outlet installed at the other end, and an inner lower cover installed at one end of the filter part.

[0018] The above filter part is located on the inner diameter of the supply passage and has an external carbon filter installed in the inner diameter carbon filter installation hole of the external carbon filter,

[0019] An anti-virus filter installed in the inner diameter filter installation hole of the above external carbon filter,

[0020] A post carbon filter installed in the inner diameter post installation hole of the above anti-virus filter,

[0021] It is composed of a bead for removing pipas installed between the outlet passage and outlet of the above post carbon filter.

[0022] The above-mentioned bead for removing the pipas is inserted between the outlet passage and the outlet of the post carbon filter and is supported from the lower side by an inner lower cover.

[0023] The above filter cover part includes an inner lower cover and an inner cover combined together, and a particulate matter removal filter further installed in the lower side of the inner lower cover and the inner diameter filter installation groove of the inner cover.

[0024] The above filter cover part has a filter fixing protrusion protruding from the lower center to fix the post carbon filter and an upper cover that is combined with the outer diameter on the upper side of the particulate matter removal filter,

[0025] An inner lower cover that is joined to the outer diameter at the bottom of the above particulate matter removal filter,

[0026] It includes a lower cover that is combined with the inner lower cover and has a discharge port formed on the lower side.

[0027] The above-mentioned beads for removing pores are made of corn starch or corn granules, and include a mixture of the corn starch or corn granules with polyphosphate or activated carbon to form pores.

[0028] The above inner lower cover has an inner groove formed into which a fixing projection is engaged, a cover fixing protrusion is formed with an outer diameter of the inner groove, is engaged with a post-pipas removal filter, and includes an inner reinforcing member that engages a filter portion therein.

[0029] The filter for removing pipas of the present invention, which is constructed in this manner, can suppress the occurrence of scale caused by hard substances such as lime, and remove pipas, which is an artificially made organic compound and a carcinogenic chemical substance, thereby solving various problems caused by them.

[0030] Additionally, the positively charged filter located within the carbon filter has the ability to remove viruses (including microorganisms), thereby preventing the ultra-fine filter from being contaminated with viruses.

[0031] In addition, the ultra-fine filter is used as an axis to support the filter section through a configuration in which both ends are fixed to the filter cover and the tea bag storing the pipas is inserted into the passage inside the cylinder in the form of a bead, thereby stably performing the role of the core of the filter section.

[0032] In addition, corn powder or granules, which are substances that remove phlegm, are mixed with polyphosphate or activated carbon to form pores of various shapes, thereby providing the effect of improving the removal ability of phlegm.

[0033] Figure 1 is a perspective view of a water purification filter used in the present invention and in the past.

[0034] Figure 2 is a partially disassembled perspective view of a water purification filter used in the present invention.

[0035] Figure 3 is a cross-sectional view of a water purification filter having the ability to suppress scale generation and the ability to remove phlegm, showing a preferred embodiment of the present invention.

[0036] Figure 4 is a front cross-sectional view taken along line AA of Figure 3 of the present invention.

[0037] Figure 5 is an enlarged cross-sectional view of the upper part of the water purification filter of the present invention.

[0038] Figure 6 is an enlarged cross-sectional view of the lower part of the water purification filter of the present invention.

[0039] Figure 7 is a cross-sectional view of the filter part of the water purification filter of the present invention in a separated state.

[0040] Figure 8 is a perspective view of the filter unit of the water purification filter of the present invention.

[0041] Figure 9 is a perspective view of the filter unit of the water purification filter of the present invention in a separated state.

[0042] Figure 10 is a cross-sectional perspective view showing the installation state of the filter in the filter unit of the present invention.

[0043] Figure 11 is an exploded perspective view of the main part of the bead for removing the pipas of the present invention.

[0044] Figure 12 is an exploded perspective view of the bottom surface of the main part of the filter unit of the present invention.

[0045] Figure 13 is a cross-sectional view of the installation state of the filter unit of the present invention.

[0046] Figure 14 is a BB line front cross-sectional view of Figure 14 of the present invention.

[0047] Figure 15 is a planar cross-sectional view of the present invention with the bead for removing the pipas installed.

[0048] Figure 16 is an enlarged cross-sectional view of the main part where the bead for removing the pipas of the present invention is installed.

[0049] Figure 17 is a planar cross-sectional view of the installation state of the post-pipas removal filter of the present invention.

[0050] Figure 18 is a front cross-sectional view of the installation state of the post-pipas removal filter of the present invention.

[0051] [Explanation of symbols]

[0052] F: Water purification filter 100: Filter housing

[0053] 110: Housing body 120: Housing cover

[0054] 130: Inlet 140: Supply channel

[0055] 200: Filter section 210: External carbon filter

[0056] 220: Antivirus filter 230: Post-carbon filter

[0057] 240: Beads for removing Fipas 245: Post Fipas removal filter

[0058] 250: Outlet channel 280: Removal filter

[0059] 281: Fipas removal material 300: Filter cover

[0060] 310: Top cover 311: Filter fixing protrusion

[0061] 320: Inner lower cover 321: Phosphate bead fixing protrusion

[0062] 322: Cover fixing jaw 323: Internal groove

[0063] 324: Internal reinforcement 330: Lower cover

[0064] 331: Outlet 332: Filter installation groove

[0065] To fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. These embodiments are provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that identical components in terms of angles are sometimes depicted with the same reference numerals. Detailed descriptions of well-known functions and configurations that may unnecessarily obscure the gist of the present invention are omitted.

[0066] The invention is a water purification filter installed in a water purifier, which has the ability to suppress the formation of scale caused by hard substances such as lime contained in raw water and the ability to remove PFAS contained in raw water.

[0067] In the present invention, "corn (Zea mays L.)" refers to powder or granules obtained from corn kernels. Corn is a tropical crop belonging to the gramineae family, and in the East, it is used not only for food but also as a herbal medicine. For medicinal purposes, corn roots and leaves have been used to treat symptoms such as urinary urgency and urinary stones. In addition, corn bran or silk contains physiologically active ingredients such as ferulic acid, coumaric acid, N,N-diferuloylputrescine, N,Ndicoumaroylputrescine, carotenoids, phytosterols, corn fiber, and maysin, and are known to exhibit activities such as anticancer, antihypertensive, antidiabetic, antioxidant, antiobesity, and antiaging.

[0068] The present invention's filter for removing pipas is a water purification filter installed in a water purifier, which can suppress the occurrence of scale due to hardness substances and lime contained in raw water, and removes artificially made organic compounds and carcinogenic chemicals, so that the final filter removes pipas.

[0069] Scale that occurs in water purifiers generally occurs at the rear of the hot water module, blocks the product's flow path, reduces the flow of hot water, and causes problems such as valve errors and excessive extraction noise.

[0070] The present invention will be described in more detail with reference to the attached drawings showing an embodiment of a filter for removing pipas.

[0071] Referring to FIGS. 2 to 6,

[0072] The composition of the water purification filter (F) having the ability to remove phlegm of the present invention largely includes a hollow cylindrical filter housing (100) in which the upper part is closed in the drawing and the lower part is formed such that the inlet (130) for supplying raw water protrudes outward, a filter unit (200) built into the inner hollow part of the filter housing (100) and allowing the raw water introduced into the inlet (130) to pass inward from the outside where the supply passage (140) is located to purify the water, and a filter cover unit (300) having an upper cover (310) installed at the upper side of both ends of the filter unit (200) and an internal lower cover (320) and a lower cover (330) installed at the lower side.

[0073] The above filter housing (100) is configured to house a filter cover (300) and a filter unit (200) in a hollow portion on the inside, which are provided with upper covers (310) and lower covers (330) at both ends, and is composed of a housing body (110) formed to have an inlet (130) through which raw water flows on one side, and a housing cover (120) coupled to the housing body (110). This is a known configuration.

[0074] The above filter unit (200) has the ability to suppress the occurrence of scale due to hardness materials and limestone by including polyphosphate and a positive charge filter, and the ability to remove viruses (including microorganisms).

[0075] The above filter unit (200) includes a particle material removal filter (212) made of nonwoven fabric that removes particle material in raw water introduced into the inlet (130), an external carbon filter (210) formed in a central carbon filter installation hole (213) of the particle material removal filter (212), an anti-virus filter (220) formed in a central filter installation hole (211) of the external carbon filter (210) and configured to have a virus removal ability, and a post carbon filter (230) formed in a central post installation hole (221) of the anti-virus filter (220) and having a central axis function.

[0076] The above filter unit (20) includes a configuration of a bead (240) for removing phlegm that is inserted so as to be tilted downward in the central outlet passage (250) of the post carbon filter (230), and includes a configuration for removing artificial organic compounds and carcinogenic chemicals.

[0077] Typically, the above-mentioned particulate matter removal filter (212), external carbon filter (210), anti-virus filter (220), and post carbon filter (230) are formed in the form of hollow tubes that are formed so that the pores become smaller and smaller from the outer diameter to the inner diameter and are combined to form layers.

[0078] It is preferable that these particulate matter removal filter (212), external carbon filter (210), anti-virus filter (220), and post carbon filter (230) are generally formed to have concentric circles and assembled to form a single cylinder.

[0079] The above particulate matter removal filter (212) is formed of non-woven fabric and supplies raw water supplied to the inlet (130) in the circumferential direction through the supply passage (140), and primarily removes relatively large particulate matter in the raw water and lowers turbidity.

[0080] The above particulate matter removal filter (212) is formed in a hollow tube shape including a carbon filter installation hole (213) in the inner diameter, and an upper cover (310) is installed at the upper end of the drawing to seal it, and a lower cover (330) having an outlet (331) is installed at the lower end, so that raw water introduced into the inlet (130) flows inward along the circumference in the supply passage (140) and is purified while circulating from the outlet passage (250) through the outlet (331).

[0081] As is widely known, the above external carbon filter (210) and post carbon filter (230) have the ability to remove volatile organic compounds (VOC), lead (Pb), and heavy metals contained in raw water.

[0082] The above external carbon filter (210) is installed in the inner diameter carbon filter installation hole (213) of the particulate matter removal filter (212) and is double-bonded to have different sizes in a cylindrical shape, and removes volatile organic compounds (VOC), lead (Pb), and heavy metals contained in the raw water that has been primarily filtered by the particulate matter removal filter (212).

[0083] The anti-virus filter (220) is inserted into the inner filter installation hole (211) of the external carbon filter (210) to remove virus components contained in the purified water filtered by the external carbon filter (210). This includes providing a functionality of preventing the generation of viruses within the filter unit (200) by preventing the phenomenon of the post carbon filter (230) installed inside from being contaminated with viruses and the phenomenon of viruses multiplying as a result.

[0084] The above anti-virus filter (220) is folded in a zigzag shape to have a “W” shape when viewed from the plane while being formed to have a predetermined thickness between the external carbon filter (210) and the post carbon filter (230) formed in the inner diameter of the filter installation hole (211). "It includes rolling and forming to form a cylinder.

[0085] In general, contaminants such as germs, bacteria, and viruses in water have a negative charge, and the anti-virus filter (220) effectively adsorbs and removes contaminants including viruses with a negative charge, thereby performing water purification to remove viral components.

[0086] The above post carbon filter (230) is inserted into the inner diameter post installation hole (221) of the anti-virus filter (220) and supplies the purified water filtered by the anti-virus filter (220) to the inner diameter outlet passage (250).

[0087] The above post carbon filter (230) is formed in a cylindrical shape, and the upper end of the two ends 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 solid fixing state on both sides, thereby enabling the filter unit (200) to perform the role of a stable and solid core.

[0088] The bead (240) for removing phytosan, which is installed on the lower side of the above-mentioned outlet (250), is configured to remove artificial organic compounds and carcinogenic chemicals between the outlet (250) and the outlet (331) of the post carbon filter (230), and is configured to be in the form of a case so that corn powder or corn granules can be inserted and stored inside.

[0089] These beads (240) for removing PIPAS remove artificial organic compounds and carcinogenic chemicals caused by PIPAS contained in the filtered water that passes through the post carbon filter (230).

[0090] The corn powder or corn granules supplied to the above-mentioned PIPA removal bead (240) are made of a material having the ability to remove PIPA contained in purified water.

[0091] The above corn powder is formed so as to satisfy the conditions as shown in [Table 1] below, and the corn granules are formed so as to satisfy the conditions as shown in [Table 2] below.

[0092] Corn powder ball test volume (density) 0.55 kg / L (34.3 lbs / ft3) effective size 50~220 ㎛ thermal stability 300℃ (572°F) moisture content 8~12%

[0093] Corn Granules Investigation Volumetric Density (Wet Granules) 0.5 kg / L (31.2 lbs / ft3) Effective Size 212~1000 ㎛ Specific Gravity 1.1 Moisture Content 13~17% Ball Pan Hardness >93%

[0094] The above-mentioned bead (240) for removing pipas can be formed in a powder or granular form to have many pores, and can be used by mixing with polyphosphate or activated carbon. Since it loses its functionality due to carbonization when processed at a temperature of 200°C or higher, it is formed at a temperature of 200°C or lower.

[0095] In applying the above-mentioned PIPA removal beads (240) or post carbon filter (230), in addition to forming them in a powder or granule form to have pores, or using them mixed with polyphosphate or activated carbon, it includes forming them in a powder or granule form by focusing on the inner or outer diameter of the post carbon filter (230), replacing the PIPA removal beads (240) with phosphate beads, or allowing them to be additionally installed as a separate case in any part of the outflow passage (250) formed on the upper side of the PIPA removal beads (240), and applying the PIPA removal beads (240) in a case that is perforated, or in a pouch form using a material such as gauze or cloth, and implementing them as boxes having various designs and shapes.

[0096] The above filter cover part (300) is composed of an upper cover (310) installed on the upper side of the filter part (200) to close it, a lower cover (330) having an outlet (331) installed on the lower side, and an inner lower cover (320).

[0097] The upper cover (310) is installed on the upper side of the filter unit (200) in the drawing to close the upper side of the filter unit (200) so that the filter housing (100) including the supply passage (140) and the raw water can be separated, the filter housing (100) can receive the raw water from the outside and supply it to the supply passage (140), and the filter unit (200) is installed so that the raw water supplied to the supply passage (140) moves from the particulate matter removal filter (212) toward the central outlet passage (250) and is purified.

[0098] The upper cover (310) is installed so that the post carbon filter (230) can be stably maintained in a fixed state by having a filter fixing protrusion (311) protruding downward from the center of the inside so that the post carbon filter (230) can be fitted into the inner or outer diameter and maintained in a fixed state.

[0099] The above lower cover (330) is installed on the lower side of the filter unit (200) in the drawing, and is installed as an integral part by being connected to the inner lower cover (320) on the upper side, and the filter unit (200) is connected to the upper side of the inner lower cover (320).

[0100] The lower cover (330) has a discharge port (331) formed downward from the center to be connected to a discharge passage (250) so that purified water can be received and supplied, and a filter installation groove (332) is formed upwardly in which a lower reinforcement member is installed at a constant interval in the circumferential direction, and a particulate matter removal filter (280) is installed, and a fixing protrusion (333) is formed in double rows in the outer diameter direction.

[0101] The inner lower cover (320) above includes a groove formed on the lower side to support and fix the particulate matter removal filter (280) on both sides together with the filter installation groove (332), an inner groove (323) is formed in the outer diameter direction to which the inner direction of the double fixing protrusions (333) is coupled, a cover fixing protrusion (322) is formed at the outer end, and an internal reinforcing member (324) is installed at regular intervals in the circumferential direction on the inner side of the upper side to support the lower side of the filter unit (200).

[0102] The above inner lower cover (320) is installed so that the center is perforated and a phosphate bead fixing protrusion (321) protrudes upward to support the lower side of the bead (240) for removing pipas, and the lower side of the post carbon filter (230) is fixed by combining it with the inner or outer diameter, thereby stably maintaining the post role of the filter unit (200) through the post carbon filter (230).

[0103] As shown in the above drawings 6, 7 and 9, the upper part of the removal filter (280) is coated with a P-PASS removal material (281) formed by mixing either corn powder or corn granules with polyphosphate or activated carbon to a predetermined thickness, thereby forming the material to have the ability to remove P-PASS made of artificial organic compounds or carcinogenic chemicals.

[0104] Meanwhile, the present invention includes shaping the post carbon filter (230) by mixing either corn powder or corn granules with polyphosphate or activated carbon, thereby forming a post carbon filter (245) formed by installing the post carbon filter (230) and forming the post carbon filter (245) so as to have the ability to remove carbon dioxide made of artificial organic compounds or carcinogenic chemicals, so as to have the ability to remove carbon dioxide made of artificial organic compounds or carcinogenic chemicals, since the area in contact with purified water may be relatively small when the bead (240) for removing carbon dioxide is supplied as shown in FIGS. 19 and 20.

[0105] The above post-fibre removal filter (245) includes forming at a temperature of 200°C or lower during the forming process using corn powder or corn granules.

[0106] Therefore, it should be readily understood that the present invention is not limited to the forms described in the detailed description above. Therefore, the true technical scope of protection of the present invention should be determined by the technical spirit of the appended claims.

[0107] It is also to be understood that the present invention includes all modifications, equivalents and alternatives falling within the spirit and scope of the present invention as defined by the appended claims.

[0108] The water purification filter of the present invention, which has the ability to suppress scale generation and the ability to remove phlegm, can be widely used in farms and other places where tap water is supplied and raw water is used, as it can solve problems caused by scale generated by hard substances.

[0109] In addition, raw water is contaminated when exposed to pollutants such as germs, bacteria, and viruses, and is contaminated with artificial organic compounds and carcinogenic chemicals. Thus, the invention provides a very useful invention that can be widely used by removing common pollutants and carcinogens such as germs, bacteria, viruses, and pipas, thereby enabling the safe use of raw water.

Claims

1. A water purification filter mounted on a water purifier, including a filter housing having an inlet through which water is supplied and an outlet through which the supplied raw water is purified and discharged, A cylindrical filter unit (200) including an external carbon filter (210) that is inserted and installed in a filter housing (100) and removes volatile organic compounds and heavy metals contained in raw water supplied to an inlet (130), an anti-virus filter (220) that has the ability to remove bacteria, and a post carbon filter (230); A bead (240) for removing PIPAS that suppresses artificially made organic compounds and carcinogenic chemicals between the outlet passage (250) and the outlet (331) of the above post carbon filter (230); A filter for removing pipas, comprising a filter cover (300) comprising an upper cover (310) installed at one end of the filter section (200), a lower cover (330) having an outlet (331) installed at the other end, and an inner lower cover (320) installed at one end of the filter section (200); 2. In paragraph 1, The above filter part (200) is located on the inner diameter of the supply passage (140) and includes an external carbon filter (210) installed in the inner diameter carbon filter installation hole (213) of the external carbon filter (210), An anti-virus filter (220) installed in the inner diameter filter installation hole (211) of the above external carbon filter (210), A post carbon filter (230) installed in the inner diameter post installation hole (221) of the above anti-virus filter (220), A filter for removing FISH consisting of a FISH removing bead (240) installed between the outlet passage (250) and the outlet (331) of the above post carbon filter (230).

3. In paragraph 1, A filter for removing filtrate, including a bead (240) for removing filtrate, which is inserted between the outlet passage (250) and the outlet (331) of the post carbon filter (230) and is supported from the lower side by an inner lower cover (320).

4. In paragraph 1, The filter cover part (300) above is a filter for removing particulate matter, which includes an inner lower cover (320) and a lower cover (330) joined together, and a particulate matter removal filter (280) further installed in the lower side of the inner lower cover (320) and the inner diameter filter installation groove (332) of the lower cover (330).

5. In paragraph 1, The above filter cover part (300) has a filter fixing protrusion (311) protruding from the lower center to fix the post carbon filter (230) and an upper cover (310) that is combined with the outer diameter on the upper side of the particulate matter removal filter (212), An inner lower cover (320) that is coupled to the outer diameter at the lower side of the above particulate matter removal filter (212), A filter for removing pipas, comprising a lower cover (330) that is combined with the inner lower cover (320) and has an outlet (331) formed on the lower side.

6. In paragraph 3, The above-mentioned filter for removing pores (240) is made of corn starch or corn granules, and includes a filter for removing pores formed by mixing the corn starch or corn granules with polyphosphate or activated carbon.

7. In paragraph 5, The inner lower cover (320) above has an inner groove (323) formed therein to which a fixing projection (333) is coupled, a cover fixing protrusion (322) is formed with an outer diameter of the inner groove (323), and a filter for removing pipas, which is coupled with a post pipas removal filter (245) and includes an inner reinforcing member (324) to which a filter unit (200) is coupled therein.

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