JP5871664B2 - Water purification cartridge and water purifier provided with the same - Google Patents

Description

  The present invention relates to a water purification cartridge and a water purifier having the same, and more particularly to a technique for visually confirming the replacement timing of a water purification cartridge.

  As the water purifier, for example, a faucet-directed type that is directly connected to a tap water faucet, a faucet-integrated type that is integrally installed inside the faucet, a faucet or a branched faucet provided at the faucet, A stationary type that is connected to the faucet and installed near the faucet, an under-sink type that is installed inside the sink, and a portable device that can be carried indoors or outdoors, such as at home or in a restaurant. There are known types (for example, pitcher type water purifiers and pot type water purifiers).

  Some water purifiers include a water purification cartridge containing activated carbon, a hollow fiber membrane, or the like. This water purification cartridge needs to be replaced with a new cartridge because the filtration performance deteriorates when a predetermined amount of raw water is filtered. However, since the water purification cartridge is attached to the inside of the main body of the water purifier, the user tends to forget the replacement time. Further, it cannot be determined from the appearance whether or not the purification performance of the water purification cartridge is deteriorated. In view of this, a water purification cartridge has been proposed in which the replacement time can be visually confirmed.

  For example, Patent Document 1 includes a filtration cartridge provided with a filter medium therein, a filter main body having an inlet of raw water and an outlet of filtered water and containing the filtration cartridge, and for the filtration. A filter having a filter for indicating filtration performance provided in a water channel from the raw water inlet of the cartridge to the filter medium container, and a transparent part for visually observing the filter from the outside in the filter container. Is disclosed.

  Patent Document 2 discloses a water purifier having an indicator obtained by dyeing a pigment having brown color with chlorine on a simple substance that is insoluble in water, on the outlet side of the water purifier. There is disclosed a water purifier characterized by notifying the replacement time of the adsorbent filled in the vessel.

  Patent Document 3 discloses a water purifier comprising a container in which a plurality of holes penetrating inside and outside, a water purifying member housed in the container, and a levitation means for levitating the container to water. There is disclosed a water purifier comprising life determination means for determining whether or not the amount of water purified by the water purification member has reached a saturation level that can be purified by color change.

  Patent Document 4 discloses a water purification unit that incorporates a residual chlorine removing material that removes residual chlorine in a liquid, a water supply unit that supplies liquid to the water purification unit, and water discharge that discharges the liquid from which residual chlorine has been removed by the water purification unit. An indicator obtained by staining the carrier with a dye that changes color by contacting residual chlorine between the residual chlorine removing material and the water discharge part, so that the indicator can be visually observed from the outside. A water purifier with an indicator is disclosed, wherein the indicator carrier is a sheet-like fiber material.

  Patent Document 5 discloses a water purifier in which a filter member is housed in a container having an inlet for raw water and an outlet for water purification, and characters, figures, symbols, shapes, patterns, colors on the outer surface of the container. Etc. are appropriately combined to form a morphological pattern portion, and a transparent or semi-transparent viewing region where the filter member can be visually observed is provided in a part of the morphological pattern portion, and the shape of this visual region is referred to as the morphological pattern portion. A water purifier characterized by being configured to be combined and integrated is disclosed.

  Patent Document 6 is a cylindrical cartridge that purifies tap water, and an end member is attached to an end portion in the axial direction, and the shaft of the purification material that is axially inner than the end member is attached to the end member. There is disclosed a cartridge for purifying tap water, which is provided with a translucent window for visually observing the dirt on the direction end face.

  Patent Document 7 includes a water purification cartridge, a replacement time display portion having a window portion, a water purifier body having a faucet connection portion and a connection portion of the water purification cartridge, and the water purification cartridge has the water purifier body as a faucet. A faucet-directly connected water purifier arranged so as to be vertically downward with respect to the faucet pipe when connected, and the window portion of the replacement time display portion is visibly arranged on the upper surface of the water purifier main body. A faucet directly connected water purifier is disclosed.

Japanese Patent Laid-Open No. 62-247886 JP-A 64-56185 JP-A-10-57951 JP 2000-102783 A JP 2001-170621 A JP 2002-361234 A JP 2008-212932 A

  The conventional water purification cartridge that allows the replacement time to be visually recognized has a problem that it is difficult to recognize the replacement time because the entire cartridge is uniformly discolored. This invention is made | formed in view of the said situation, Comprising: It aims at providing the novel water quality purification cartridge which can confirm the replacement time from the outside, and a water purifier provided with the same.

  The water purification cartridge of the present invention includes a cylindrical body formed of a filtering material, a downstream connection end attached to the downstream side of the cylindrical body, and an upstream cartridge attached to the upstream side of the cylindrical body. And a water purification cartridge in which the cylindrical body is filled with a water purification material, wherein a low water passage portion is provided in the filter medium constituting the cylindrical body. To do.

  The water purification cartridge of the present invention purifies raw water that has flowed in from the outside to the inside of a cylindrical body formed of a filter medium, with the water purification material filled in the inside of the cylindrical body, and the purified water purified downstream It discharges from the clean water discharge port of the downstream connection end provided in the side. Raw water contains turbid components such as water pipe rust. This turbid component adheres to the filter medium constituting the cylindrical body and colors the filter medium. The water purification cartridge of the present invention is provided with a low water passage portion through which the raw water is difficult to pass through the filter medium constituting the cylindrical body. In the low water flow section, the raw water is difficult to pass through, so turbid components are difficult to adhere. Therefore, the low water passage portion is difficult to be colored. As a result, a difference in color occurs between the water flow portion and the low water flow portion, and the low water flow portion can be visually recognized. Since the degree of discoloration of the filter medium is proportional to the amount of raw water treated, the user can recognize that it is time to replace the water purification cartridge if the low water passage portion is clearly displayed. For example, characters, symbols, or figures made of a low water passage portion can be created in the filter medium. The replacement time can be alerted to the user using specific characters, symbols, or figures.

  The said low water flow part can be formed by carrying out the coating, the hot stamping, or the embossing of the filter material which comprises a cylindrical body, for example.

  ADVANTAGE OF THE INVENTION According to this invention, the replacement | exchange time of a water quality purification cartridge can be confirmed from the outside, reduction to forget replacement | exchange can be reduced, and purified water can be supplied stably.

The longitudinal cross-sectional view which shows an example of the water purification cartridge of this invention. Explanatory drawing which shows the state after use of the water purification cartridge of this invention before and after use. The side view which shows an example of the water purifier which incorporated the water quality purification cartridge of this invention.

  The water purification cartridge of the present invention includes a cylindrical body formed of a filtering material, a downstream connection end attached to the downstream side of the cylindrical body, and an upstream cartridge attached to the upstream side of the cylindrical body. And a water purification cartridge in which the cylindrical body is filled with a water purification material, wherein a low water passage portion is provided in the filter medium constituting the cylindrical body. To do.

  In the present invention, the “low water passage portion” means a portion that has been treated so that the water permeability is lowered as compared with the normal water permeability of the “filter material”. Examples of the “low water flow portion” include (1) a place where the filter medium constituting the cylindrical body is subjected to hot stamping or embossing, (2) a place where the filter medium constituting the cylindrical body is coated, or (3) The location where the film was laminated | stacked on the filter medium which comprises a cylindrical body can be mentioned. Among these, from the viewpoint that a low water passage portion can be easily formed without using a coating agent or a film, in the present invention, (1) applying heat stamping or embossing to the filter medium constituting the cylindrical body. Therefore, it is preferable to form a low water passage portion. Hereinafter, the aspect which forms a low water flow part is demonstrated in detail.

(1) About the aspect which forms a low water flow part by hot stamping or embossing When hot stamping or embossing is applied to the filter medium constituting the tubular body, the filter medium is compressed and the gap of the filter medium is small. The part which has become, the member which comprises a filter medium melt | fuses, the location where the space | gap of a filter medium is lose | eliminated, etc. are formed. Since these places have fewer voids and lower water permeability than the untreated places of the filter medium, they form a low water passage portion. The hot stamping or embossing is preferably performed on the surface side (raw water flow path side) of the filter medium constituting the cylindrical body.

  In an embodiment in which the low water passage portion is formed by hot stamping or embossing, it is preferable to use a resin filter material that is softened or melted by heating. In particular, it is preferable to use a resinous nonwoven fabric described later as the filter medium. The water purification cartridge of the present invention may be produced by winding around a molded product of the water purification material using a filter material that has been subjected to thermal stamping or embossing in advance, or a molded product of the water purification material The filter medium may be wound around and then engraved or embossed. In particular, when a filter medium is wound and compressed to form a cylindrical body, it is preferable to perform hot stamping or embossing at the same time.

(2) About the aspect which coats the filter medium which comprises a cylindrical body, and forms a low water-permeable part The space | gap of a filter medium is plugged up with the coating agent in the location which coated the filter medium which comprises a cylindrical body. It is. Since these places have fewer voids and lower water permeability than the untreated places of the filter medium, they form a low water passage portion. The coating is preferably performed on the surface side (raw water flow path side) of the filter medium constituting the cylindrical body.

  As the coating agent, it is preferable to use a resin component such as a thermoplastic resin or a thermosetting resin. Examples of the thermoplastic resin component include polyolefins such as polyethylene and polypropylene; polystyrene; vinyl resins such as vinyl chloride, vinylidene chloride, and polyvinyl acetate resins; fluorine resins; acrylic resins; polyamide resins; acetal resins; polycarbonates; Oxides; polyesters; polysulfones; polyimides; polyurethanes and the like. The low water passage portion can be formed, for example, by dissolving the thermoplastic resin component in a solvent or the like, applying the obtained liquid composition to a filter medium, and drying. Alternatively, the thermoplastic resin may be heated, previously melted, applied to the filter medium, and then cooled and solidified to form the low water passage portion.

  Examples of the thermosetting resin that can be applied to the filter medium include phenol resin, urea resin, melamine resin, alkyd resin, polyurethane resin, and epoxy resin. These thermosetting resins can form a low water flow part by mixing a main ingredient and a hardening | curing agent, and apply | coating to a filter material and making it harden | cure.

  The thickness of the low water passage portion formed by the coating agent is preferably 0.3 mm or less, and more preferably 0.25 mm or less. If the low water passage portion formed by the coating agent becomes too thick, the low water passage portion may be peeled off when the user touches the water purification cartridge. The lower limit of the thickness of the low water passage portion formed by the coating agent is not particularly limited, but is preferably 0.2 mm.

(3) About the aspect which forms a low water-permeable part by laminating | stacking a film on the filter medium which comprises a cylindrical body If a film is laminated | stacked on the surface side or inner side of the filter medium which comprises a cylindrical body, The upstream side or the downstream side of the filter medium is closed. The portion where the film is laminated forms a low water passage portion because the water permeability is lower than the untreated portion of the filter medium. It does not specifically limit as said film, For example, the film of the thermoplastic resin illustrated as a coating agent can be mentioned. As thickness of the said film, 10 micrometers or more are preferable, for example, 30 micrometers or more are preferable, 100 micrometers or less are preferable, and 300 micrometers or less are preferable.

The coating agent and the film are both in a form that completely shields the entire area of the low water passage portion (no water passage at all) or in a form that partially shields (for example, there are many fine holes). Also good. The former is suitable for enhancing the visibility after the color change of the low water flow portion, and the latter is preferred for enhancing the purification performance (the amount of purified water flowing per hour during which water can be purified).

  As mentioned above, although the three aspects which form a low water flow part were illustrated, the aspect which forms a low water flow part is not limited to these, It can change suitably.

  In the water purification cartridge of the present invention, the ratio of the area of the low water passage portion to the surface of the cylindrical body is preferably 5% or more, more preferably 10% or more, preferably 40% or less, more preferably 30% or less. . If the ratio of the area of the low water passage portion is less than 5%, it is difficult to recognize the low water passage portion. Moreover, if the ratio of the area of a low water flow part exceeds 40%, water purification performance may fall.

  In the water purification cartridge of the present invention, it is preferable that the low water passage portion is not recognized so much before use, and the low water passage portion is recognized for the first time by use from the viewpoint of prompting replacement. From such a viewpoint, it is preferable that the low water passage portion is formed of a transparent or translucent material, or has the same or similar color tone as that of the filter medium. When the low water flow section is made of a transparent or translucent material, the color tone of the cylindrical body that is the base of the low water flow section appears. Therefore, before using the water purification cartridge, the low water flow section and the water flow section There is almost no difference in color tone, and the low water passage is not recognized much.

  In the present invention, it is also preferable to create a character, symbol, or figure consisting of a low water passage portion on the filter medium (preferably on the surface of the cylindrical body). More specifically, the replacement time can be evoked by characters, symbols, or figures.

  Hereinafter, the configuration of the water purification cartridge of the present invention will be described in detail with reference to FIG. 1, but the water purification cartridge of the present invention is not limited to the embodiment described in FIG. The water purification cartridge 1 includes a cylindrical body 3 formed of a filtering material, a downstream connection end 5 attached to the downstream side of the cylindrical body 3, and an upstream side attached to the upstream side of the cylindrical body. And a cartridge cover 7. The inside of the cylindrical body 3 formed from the filter medium is filled with a water purification material 9.

First, the cylindrical body 3 formed from the filter medium will be described. The filter medium is not particularly limited as long as it can remove relatively large insoluble matters (for example, rust of water pipes) contained in the raw water, but for example, non-woven fabric, woven fabric, knitted fabric, porous membrane, etc. Can be mentioned. Among these, a nonwoven fabric is preferable. The filter medium may be made of resin or metal. In particular, in the present invention, it is preferable to use a non-woven tubular body as the tubular body formed from the filter medium. In addition, the said filter medium may have the function of the water quality purification material which is mentioned later, and does not need to have it.

  Examples of the non-woven fabric include non-woven fabrics formed from hydrophilic fibers such as cellulose, rayon, and cotton; non-woven fabrics formed from hydrophobic fibers such as polypropylene, polyethylene, polyester, and polyamide. Moreover, as a nonwoven fabric, what is manufactured by the spun bond method, the air through method, the point bond method, the melt blow method, the airlaid method, the combination of those manufacturing methods, etc. is preferable. Moreover, you may use the nonwoven fabric manufactured by SMS method which combined the spun bond method and the melt blow method.

  In order to make it easy to form a low water passage part by performing hot stamping or embossing, it is also preferable that the non-woven fabric contains a heat-sealing fiber. Examples of the heat-fusible fiber include a composite fiber composed of two types of resin components having different melting points. For example, a composite fiber having a side-by-side structure composed of a high-melting component and a low-melting component, or high It is preferable to use a core-sheath composite fiber composed of a melting point component and a low melting point component.

  Examples of the heat-fusible fiber include polyester fiber including polyester-modified polyester composite fiber, polyamide fiber including 6 nylon-66 nylon composite fiber, and polyolefin fiber including polyolefin-modified polyolefin.

  The thickness of the filter medium is not particularly limited, but is preferably 0.2 mm or more, preferably 1 mm or less, and more preferably 0.5 mm. If it is less than 0.2 mm, the filtration performance of the filter medium may not be sufficiently exhibited. If it exceeds 1 mm, the amount of water that permeates the filter medium is limited, and therefore a sufficient amount of water discharged from the faucet cannot be secured. This causes inconvenience for the user. If it is 0.5 mm, the difference in density and the thermal marking will become clearer.

  The filter medium may be either a single layer or a multilayer structure, but is preferably a three layer. In the case of a multilayer structure, it is preferable that the total thickness of the filter medium falls within the above range. The low water passage portion may be provided in at least one layer of the filter medium, and may be provided in all layers of the multilayer structure.

  Examples of the shape of the cylindrical body 3 include a cylindrical shape and a polygonal column shape, and a cylindrical shape is preferable. The water purification cartridge 1 in FIG. 1 has a cylindrical tubular body 3.

  The inside of the cylindrical body 3 formed from the filter material is filled with a water purification material 9. The water purification material 9 removes minute foreign substances that have passed through organic substances such as chlorine, heavy metals, and trihalomethane, bacteria, microorganisms, and other filtering materials contained in the raw water. Specific examples of the water purification material 9 include natural product-based adsorbents (natural zeolite, silver zeolite, acidic clay, etc.), synthetic product-based adsorbents (synthetic zeolite, bacterial adsorption polymer, phosphorus ore, molecular sieve, silica gel, silica alumina. Inorganic adsorbents such as gel-based adsorbents and porous glass), powdered activated carbon, granular activated carbon, fibrous activated carbon, block activated carbon, extruded activated carbon, molded activated carbon, molecular adsorption resin, synthetic granular activated carbon, synthetic Well-known materials such as organic activated carbon, ion-exchange resin, ion-exchange fiber, chelate resin, chelate fiber, superabsorbent resin, superabsorbent resin, oil-absorbent resin, and organic adsorbents such as oil-absorbing agent. Among these, it is preferable to use activated carbon that is excellent in adsorptive power for organic compounds such as residual chlorine in the raw water, musty odor, and trihalomethane.

  The water purification material 9 is preferably formed into a hollow cylindrical shape, a disk shape, a columnar shape, or the like, and more preferably formed into a hollow cylindrical shape. The water purification material molded into a hollow cylindrical shape is a so-called water supply, in which when raw water passes through the molded body of the water purification material, water concentrates only on a part of the water purification material and the water purification capability is reduced early. It is possible to prevent the occurrence of the phenomenon. The water purification cartridge shown in FIG. 1 uses a water purification material 9 formed in a hollow cylindrical shape, with the outside of the cylinder as the raw water flow path and the inside as the water purification flow path. The hollow portion of the water purification material 9 may be provided with a lattice-shaped shaft core for reinforcing the strength of the water purification cartridge 1 and rectifying the purified water.

  The water purification cartridge 1 has an upstream cartridge cover 7 attached to the upstream side of the cylindrical body 3. The upstream cartridge cover 7 is formed in a bottomed short cylindrical shape that covers the outer peripheral surface of the upstream end of the cylindrical body 3, and a column portion 7 a that fits into the inner peripheral surface of the water purification material 9 is formed from the bottom. The upstream cartridge cover 7 can be attached to the water purification material 9 by projecting and inserting the column portion 7 a into the inner peripheral surface of the water purification material 9. The inner peripheral surface of the short cylindrical portion of the upstream cartridge cover 7 and the outer peripheral surface of the upstream end portion of the nonwoven fabric tubular body 3 are preferably bonded together with an adhesive, for example. The material of the upstream cartridge cover 7 is not particularly limited, but is preferably made of resin, such as ABS (acrylonitrile butadiene styrene copolymer), PP (polypropylene), POM (polyoxymethylene), PC (polycarbonate), etc. A plastic resin is more preferable.

  The water purification cartridge 1 has a downstream connection end 5 attached to the downstream side of the cylindrical body 3. The downstream connection end 5 has a large-diameter short cylindrical covering end 5a that covers the downstream end face of the cylindrical body 3 and a small-diameter cylindrical connecting end 5b that is inserted into and fixed to the water purifier body at both ends. And a central cylindrical portion 5c located between the covering end 5a and the connecting end 5b. The material of the downstream connection end 5 is not particularly limited, but is preferably made of resin, and heat such as ABS (acrylonitrile butadiene styrene copolymer), PP (polypropylene), POM (polyoxymethylene), PC (polycarbonate), etc. A plastic resin is more preferable.

  A fixed plate 11 is attached to the downstream end face of the water purification material 9 formed into a hollow cylindrical shape. The fixed plate 11 has an opening in the center, and includes a small diameter cylindrical portion 11a protruding from the opening toward the downstream side and the upstream side, and a large diameter cylindrical portion 11b protruding from the periphery toward the downstream side. The fixed plate 11 is fixed by inserting the upstream small diameter cylindrical portion 11 a into the hollow portion of the water purification material 9. Thereby, the purified water flow path from the hollow part of a water purification material to the purified water discharge port 17 is formed. A sterilizing ceramic 13 and a nonwoven fabric 15 are accommodated on the downstream side of the fixing plate 11.

  The sterilizing ceramic 13 is obtained by adsorbing silver or copper or the like on the surface of a mixture obtained by mixing zinc oxide, montmorillonite or the like with calcium phosphate as a base material and sintering it in a granular or pellet form. Adsorbs and sterilizes and releases metal ions to sterilize or sterilize harmful bacteria in the water, thereby detoxifying the water quality. The sterilizing ceramic 13 may be stored as necessary.

  The nonwoven fabric 15 removes impurities generated from the water purification material 9 from the purified water.

  The shape of the water purification cartridge of the present invention is not particularly limited, but is preferably a columnar shape such as a columnar shape or a polygonal columnar shape. This is because it is easy to secure a flow path for treating raw water, and the cartridge can be easily replaced.

  The length X of the water purification cartridge 1 is not particularly limited, but is preferably 100 mm or more, more preferably 120 mm or more, preferably 200 mm or less, and more preferably 160 mm or less. If it is less than 100 mm, the water purification material that can be filled in the water purification cartridge is reduced, so that a sufficient water purification effect may not be obtained. Moreover, since the water purification cartridge will become large if it exceeds 200 mm, the attached water purifier will also be enlarged. This causes inconvenience for the user of the water purifier.

  The thickness Y of the water purification cartridge 1 is not particularly limited, but is preferably 20 mm or more, more preferably 22 mm or more, preferably 30 mm or less, and more preferably 26 mm or less. If it is less than 20 mm, the water purification material that can be filled in the water purification cartridge is reduced, so that a sufficient water purification effect may not be expected. In addition, if it exceeds 30 mm, the water purification cartridge becomes large, so that the water purifier to be mounted becomes large. This causes inconvenience for the user of the water purifier.

  Next, the operation of the water purification cartridge 1 of the present invention will be described. The water purification cartridge 1 of the present invention uses the outside of the cylindrical body 3 formed of a filter material as a raw water flow path. Raw water contains turbid components such as water pipe rust. The raw water passes through the filter medium constituting the cylindrical body 3 and flows into the inside, but this turbid component adheres to the filter medium constituting the cylindrical body 3 and colors the filter medium. The raw water flowing into the inside of the tubular body 3 is purified by the water purification material 9 filled inside the tubular body 3, and the obtained purified water is purified water at the downstream connection end 5 provided on the downstream side. It is discharged from the discharge port 17. The filter medium constituting the tubular body 3 of the water purification cartridge 1 of the present invention is provided with a low water passage portion through which raw water is difficult to pass. In the low water flow section, the raw water is difficult to pass through, so turbid components are difficult to adhere. Therefore, the low water passage portion is difficult to be colored. As a result, a difference in color occurs between the water passage portion and the low water passage portion, and the low water passage portion can be visually recognized. Since the degree of discoloration of the filter medium is proportional to the amount of raw water treated, the user can recognize that it is time to replace the water purification cartridge if the low water passage portion is clearly displayed.

  Fig.2 (a) is a side view of the water purification cartridge 1 before use, and FIG.2 (b) is a side view of the water purification cartridge 1 which has reached the replacement time by use. On the filter medium constituting the cylindrical portion 3 of the water purification cartridge 1 before use, the word “replacement” is formed by the low water passage portion, but cannot be recognized. As shown in FIG. 2 (b), when in use, the water passage portion of the cylindrical portion 3 is colored, but the low water passage portion is not colored. Appears on the surface of the body 3.

  The water purifier of the present invention is not particularly limited as long as it includes the water purification cartridge of the present invention. The water purifier directly connected to the tap of the tap water is used. Faucet integrated type, faucet or branch faucet provided at the faucet, connected by hose or piping, etc., stationary type installed near the faucet, undersink type installed and used inside the sink, It may be any portable type that can be carried and used indoors, such as at home or in a restaurant, or outdoors. Among these, it is preferable that the water purifier of the present invention is a faucet integrated water purifier provided with the water purification cartridge.

  In the water purifier of the present invention, a part of the wall material constituting the water purifier main body is formed of a transparent or translucent member so that the cylindrical body of the water purification cartridge built in the water purifier can be confirmed. Also good. FIG. 3 is a side view showing a preferred embodiment of the water purifier with a built-in water purification cartridge in which the water purification cartridge 1 of the present invention is replaceably built in the faucet. The water purifier 20 has a separable head 22 and body 24. The head 22 and the body 24 are separated, and the water purification cartridge 1 is mounted inside the water purifier 20. In FIG. 3, a transparent window 26 is provided on the wall material of the water purifier 20 so that the surface of the cylindrical portion 3 of the water purification cartridge 1 accommodated therein can be seen. Thereby, the replacement time of the water purification cartridge 1 can be confirmed also from the outside of the water purifier 20, and when the replacement time comes, the head portion 22 and the body portion 24 are separated, and the water purification cartridge 1 can be easily obtained. Can be exchanged. Note that it is not always necessary to form a part of the wall material of the water purifier with a transparent or translucent member, and the water purification cartridge may be taken out of the water purifier and the replacement time may be confirmed.

  As described above, the present invention has been described based on preferred embodiments, but the present invention is not limited to the above-described embodiments, and the shape, configuration, arrangement, and the like of each embodiment are within the scope of the present invention. The material and the like can be changed as appropriate. Further, the definitions of the configuration, arrangement, material, shape, numerical value range, and the like shown in each embodiment can be applied independently or in combination of any two or more rules.

1: Water purification cartridge, 3: Cylindrical body formed from filter material, 5: Downstream connection end, 7: Upstream cartridge cover, 9: Water purification material, 11: Fixed plate, 13: Sterilization ceramic, 15: Non-woven fabric, 17: Water purification outlet, 20: Water purifier with built-in water purification cartridge, 22: Head, 24: Body, 26: Window

Claims (6)

A cylindrical body formed from a filter medium;
A downstream connection end attached to the downstream side of the cylindrical body;
An upstream cartridge cover attached to the upstream side of the cylindrical body,
A method of manufacturing a water purification cartridge water purification material is filled inside the cylindrical body, as a filter material constituting the tubular body, spunbonding, air-through method, point bonding method, melt blow method, air laid with the law or nonwoven fabric produced by a combination of their preparation, by the non-woven fabric to hot embossing or embossing, the filtering material, so that water permeability is reduced compared to the untreated portion of the filtering material treated with low water passing portion, the manufacturing method of water purification cartridge, characterized by providing a water passage section is a portion of the untreated filter medium. A cylindrical body formed from a filter medium;
A downstream connection end attached to the downstream side of the cylindrical body;
An upstream cartridge cover attached to the upstream side of the cylindrical body,
A method for producing a water purification cartridge in which a water purification material is filled inside the cylindrical body, wherein the filtration material constituting the cylindrical body is coated with a resin component, whereby an untreated portion of the filtration material treated with low water passing portion, the manufacturing method of water purification cartridge, characterized by providing a water passage section is a portion of the untreated filter medium so the water permeability is reduced compared to. A cylindrical body formed from a filter medium;
A downstream connection end attached to the downstream side of the cylindrical body;
An upstream cartridge cover attached to the upstream side of the cylindrical body,
A method for producing a water purification cartridge in which a water purification material is filled inside the tubular body, wherein a film is laminated on the filtration material constituting the tubular body, whereby an untreated portion of the filtration material is formed. compared with low water passing portion passing water has been treated to decrease, the manufacturing method of water purification cartridge, characterized by providing a water passing portion which is a portion of the untreated filter medium. The manufacturing method of the water purification cartridge as described in any one of Claims 1-3 which creates the character, symbol, or figure which consists of a low water-permeation part in the said filter medium. The method for producing a water purification cartridge according to claim 2 or 3, wherein a nonwoven fabric is used as the filter medium. The manufacturing method of the water purification cartridge as described in any one of Claims 1-5 which makes the ratio of the area of the low water passage part which occupies for the surface of a cylindrical body 5% or more and 40% or less .

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