JP2007275814A - Cartridge for water purifier, and water purifier - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cartridge for a water purifier in which a check valve for preventing the back flow of raw water and a filter medium is not easily dropt off therefrom, and the check valve can be fixed to a raw water inflow port with a simple structure, and to provide a water purifier provided with the cartridge. <P>SOLUTION: The cartridge for a water purifier is composed in such a manner that a filter medium is stored in a housing. The housing is composed of: a first housing provided with a raw water inflow port and a dropping-off prevention part for a check valve; a second housing water-tightly connected with the first housing; and a raw water inflow joint connected to the raw water inflow port of the first housing, and also, the check valve is arranged at the side of the raw water inflow port in the raw water inflow joint. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cartridge for a water purifier that removes residual chlorine, odor, turbidity, harmful substances and the like contained in raw water such as tap water. More specifically, the present invention relates to a water purifier cartridge having a raw water backflow prevention function unit and a water purifier including the cartridge.

  In the cartridge for water purifiers, residual chlorine contained in raw water such as tap water is decomposed and removed with various filter media to produce purified water from which the odors of chlorine have been removed. As the filtration mechanism, many are used in which residual chlorine is removed by activated carbon, and then turbid components are removed by a filter using a filtration membrane having fine pores such as a hollow fiber membrane. Here, when the filtration part is blocked for some reason, the raw water that has flowed into the cartridge and the contaminated water and the filler such as the filter medium that have accumulated inside may flow backward.

  In view of this, there has been proposed a non-return valve installed on the raw water inflow side of the water purifier in order to prevent the internal liquid or filter material from flowing backward. For example, as in Patent Document 1, there is known an installation method in which a check valve is inserted and incorporated in an inflow port of a cartridge cap toward an inflow direction of a fluid to be filtered. However, if the check valve is simply inserted and installed in the inflow port in this way, the check valve easily drops off when the cartridge is attached or detached, and it has been desired to devise something.

  Patent Document 2 proposes an installation method in which a check valve and a stopper are incorporated inside a cap that closes the cartridge case, and the check valve is positioned and fixed on the raw water inflow side by fitting the cap into the cartridge case. Has been. However, in this cartridge, since the check valve is provided inside the cap in order to incorporate the check valve inside the cap, the structure of the cap is complicated. In addition, since a stopper for pressing the check valve is also incorporated, the number of parts is increased, which causes a cost increase in manufacturing the member. In addition, when the check valve portion is blocked for some reason, there is a problem in that the entire cap must be removed to check the malfunction of the check valve assembly portion.

International Publication No. WO99 / 41203 Japanese Patent Laid-Open No. 2001-300266

  The present invention solves the above-described problems of the prior art, and the check valve for preventing the backflow of raw water and packing is difficult to drop off from the cartridge, and the check valve is fixed to the raw water inlet with a simple device structure. It is an object of the present invention to provide a water purifier cartridge that can be used, and to provide a water purifier including the cartridge.

The present invention for solving the above-described problems is characterized by the following (1) to (5).
(1) A water purifier cartridge in which a filter medium is housed in a housing, wherein the housing is a first housing having a raw water inlet and a check valve retaining portion, and a second watertightly connected to the first housing. A water purifier cartridge comprising a housing and a raw water inflow joint connected to the raw water inlet of the first housing, and a check valve disposed on the first housing side in the raw water inflow joint.

(2) The water purifier cartridge according to the above (1), wherein a check valve positioning portion for arranging a check valve at a predetermined position in the raw water inflow joint is provided.
(3) The water purifier cartridge according to (1) or (2), wherein the first housing and the raw water inflow joint are fixed to each other by a screw fitting fixing type.
(4) The water purifier cartridge according to any one of (1) to (3), wherein a plug that is fastened to the one-touch joint is formed on the raw water inflow joint.
(5) A water purifier comprising the water purifier cartridge according to any one of (1) to (4).

  In the water purifier provided with the cartridge for water purifier of the present invention, the check valve for preventing the backflow of raw water or the leakage of the water purifier filling such as the filter medium is difficult to drop off when the cartridge is attached or detached or when water is passed. . Moreover, in the water purifier cartridge of the present invention, the check valve can be fixed to the inflow portion of the raw water with a simple device structure.

  That is, in the water purifier cartridge of the present invention, the check valve is not easily dropped by fixing the raw water inflow joint in which the check valve is disposed to the raw water inlet of the first housing having the check valve retaining portion. Become. In addition, since the raw water inflow joint is a separate member from the first housing, it is not necessary to make the first housing a special structure for installing the check valve, and the check valve retaining portion is the first housing. Therefore, it is not necessary to attach a stopper member for fixing the check valve. Furthermore, when there is any abnormality in the check valve portion, only the raw water inflow joint portion can be removed to check the check valve malfunction. As a result, according to the present invention, the check valve can be disposed at the inflow portion of the raw water with a simple structure.

  Embodiments of the present invention will be described below with reference to the drawings, taking as an example a cartridge for a water purifier used in an undersink type water purifier placed under a sink in a home kitchen. In addition, this invention is not limited to the following embodiment, What is necessary is just to be able to achieve the objective of the said invention.

  In the illustrated embodiment, the water purifier cartridge 1 of the present invention has a substantially cylindrical shape as shown in the longitudinal sectional view of FIG. 1, and includes a housing 2, an adsorbent part 3, and a hollow fiber membrane module part 4. And an antibacterial portion 5 filled with a material containing antibacterial metal ions disposed downstream thereof. As shown in FIG. 3 (installation perspective view), this water purifier cartridge is usually installed by connecting the raw water side hose 6 and the purified water side hose 7 to the raw water inflow joint 9 and the purified water supply port 10, respectively. The faucet part 8 for discharging purified water is connected to the tip of the hose, and the faucet part is opened and closed by the water purifier valve 30.

  Here, the water purifier cartridge 1 is provided with a raw water inflow joint 9 to which the raw water hose 6 is connected and a purified water supply port 10 to which the purified water hose 7 is connected. The raw water inflow joint 9 is provided with a check valve 25 in order to prevent backflow of raw water and the filling material of the adsorbent part 3. The check valve 25 may be structured appropriately by using a known technique as long as the water channel opens when water flows into the cartridge, and closes when the water flows out in the reverse direction so as to prevent the reverse flow. . For example, a combination of a spherical valve body and a spring, an umbrella-shaped elastic body that opens and closes depending on the direction of water flow, and a slide valve that slides along an engaging cam groove and a spring The shape and material of the valve, such as a ball-shaped valve element that is opened and closed by its own weight or water head pressure, may be appropriately selected. The check valve 25 shown in FIGS. 1 and 2 has a structure composed of a member having a rod-shaped portion extending from a hemispherical umbrella and a helical spring extrapolated to the rod-shaped portion. When inflowing, water pressure is applied to the umbrella and the spring is compressed, creating a gap around the umbrella and opening the water channel. However, when water pressure is not applied to the umbrella part, the umbrella part is pressed around by the force of the spring, there is no gap, and the water channel is closed.

  The housing 2 constituting the outer shape of the water purifier cartridge 1 will be described. The housing 2 includes a first housing 12 having a raw water inlet 26, a check valve retaining portion 27, and a purified water supply port 10 on the upper side, and a seal member such as an O-ring 13 below the first housing. And a raw water inflow joint 9 that can be fixed to the raw water inlet 26. The lower portion of the second housing 11 is structured such that the cartridge can be placed on a flat surface. The check valve retaining portion 27 in the first housing is a portion for preventing the check valve from falling off when the raw water inflow joint 9 provided with the check valve is connected to the raw water inlet 26. For example, a structure such as a small inner diameter portion or a protrusion having an inner diameter smaller than the outer diameter of the check valve is employed.

  A check valve 25 is disposed inside the raw water inflow joint 9, and the raw water inflow joint 9 is connected to the raw water inlet 26 of the first housing so as to be stored in the backflow of the raw water or in the housing. It is possible to prevent leakage of the filter medium. Further, since the first housing 12 has the check valve retaining portion 27, the check valve 25 does not fall into the housing due to water flow. Moreover, even if the first housing 12 and the second housing 11 are connected and fixed in a watertight manner and are difficult to remove, only the raw water inflow joint 9 is removed from the first housing 12 when any abnormality occurs in the check valve. Therefore, it is not necessary to disassemble the entire cartridge, and it is easy to deal with the malfunction of the check valve.

  The raw water inflow joint 9 is preferably provided with a check valve positioning portion 28 for attaching the check valve to a predetermined position. As shown in FIG. 2, the check valve positioning portion 28 has a small inner diameter portion or protrusion for restricting the depth at which the check valve 25 can be fitted when the check valve 25 is fitted into the raw water inflow joint 9. It is preferable that the outer end of the check valve and the outer end of the raw water inflow joint be substantially flush with each other when the check valve is fitted. By having such a check valve positioning portion 28, the check valve 25 can be fitted into the raw water inflow joint 9 without requiring a special tool or jig. The check valve can be positioned by being connected to the raw water inflow portion of the housing 12.

  The first housing 12 and the raw water inflow joint 9 may be fixed by using a known method such as a screw fitting fixing type, a bayonet fixing type, a welding type using ultrasonic waves or spin welds, etc., but satisfying pressure resistance and water tightness. On the other hand, the screw fitting and fixing type is most preferable because it has both ease of assembly and removal. Further, if the outer cross-sectional shape of the raw water inflow side passage portion of the raw water inflow joint 9 is hexagonal, the raw water inflow joint 9 can be screwed and fixed to the first housing 12 using a commercially available hexagon wrench. There is no need for special jigs during assembly.

  When the plug for fastening with the one-touch joint is formed on the raw water inflow joint 9, the connection and removal from the raw water side hose 6 can be easily performed, so that the cartridge can be easily replaced. Of course, the plug to be fastened with the one-touch joint can be easily connected to and removed from the purified water hose 7 in the same manner as the plug is formed at the purified water supply port 10.

  Next, the adsorbent part 3 will be described. The adsorbent part 3 is located on the primary side (the uppermost stream side) in the cartridge, adsorbs heavy metals and organic substances contained in the raw water discharged from the water pipe, and has the function of decomposing and removing residual chlorine. The agent is filled. Here, organic substances indicate harmful organic substances contained in raw water such as 2-MIB (methylisoborneol) and trihalomethane, which are the causative substances of musty odor, and heavy metals indicate heavy metals such as lead eluted from water supply lead pipes. Residual chlorine refers to free residual chlorine or combined residual chlorine contained in tap water for sterilization.

  Filters are respectively disposed on the upstream side and the downstream side of the portion filled with the adsorbent so that water can pass through the inside filled with the adsorbent (primary filter 23, secondary filter 24).

  As such an adsorbent, activated carbon, a metal silicate such as zeolite, calcium phosphate such as hydroxyapatite, titanium oxide, an ion exchanger including an ion exchange resin, a chelate resin, or a combination thereof is used. Activated carbon is preferably used because of its high ability to remove residual chlorine, but it is more preferable to include silver-impregnated activated carbon as the activated carbon having antibacterial activity. The shape of the silver-impregnated activated carbon used here may be any of spherical, powdery, fibrous, granular, crushed, etc. Among them, the fibrous or granular form has little water resistance and has a large surface area per unit area. preferable. The filling amount of the silver impregnated activated carbon may be an amount that can be filled between the primary filter 23 and the secondary filter 24 of the water purifier cartridge 1.

  As a method for producing silver impregnated activated carbon, for example, by putting activated carbon in a silver nitrate solution, performing a reduction treatment in the vicinity of the activated carbon surface while adsorbing silver nitrate, depositing metallic silver, silver oxide, silver chloride, and then after the reduction treatment The activated carbon is washed to remove nitrate ions, followed by dehydration and drying.

  Next, the hollow fiber membrane module part 4 will be described. The hollow fiber membrane module part 4 is mainly composed of a hollow fiber membrane bundle 15, a resin fixing part 16 for fixing the end of the hollow fiber membrane bundle, and a hollow for securing a water passage portion around the hollow fiber bundle. It is composed of a yarn case 17 and the like. In the hollow fiber case 17, a hollow fiber membrane bundle 15 (schematically shown in FIG. 1) in which a plurality of hollow fiber membranes are bundled and bent into a U shape is housed. Both ends are sealed and fixed (potted) with a curable resin (sealing agent) filled between the hollow fibers and between the hollow fibers and the hollow fiber case 17 at the upper part of the hollow fiber case 17. (Resin fixing portion 16).

  The pore diameter of the hollow fiber membrane used here is preferably 10 μm or less, more preferably 2 μm or less. Furthermore, when removing a fine solid, it is preferable to use a thing with the hole diameter of 0.2 micrometer or less. The pore diameter is measured by a known method, for example, by observing each section (inner diameter, outer diameter, etc.) with an electron microscope. The material preferably contains at least one selected from polyacrylonitrile, polyvinylidene fluoride, polyethylene, polysulfone, polyvinyl alcohol, polyphenylene sulfone, and the like, more preferably polysulfone and polyvinylidene fluoride. Each of the hollow fiber membranes has a potting portion partially cut and removed, so that the end is open toward the purified water supply port 10. The hollow fiber case 17 of the hollow fiber membrane module 4 is fitted and erected in the body 12 via a seal member such as an O-ring 14.

  Next, the antibacterial part 5 will be described. As shown in FIG. 1 and FIG. 2 (enlarged longitudinal sectional view of the antibacterial part), the antibacterial part 5 is provided with a passage water channel 18 in the center of a substantially annular cylindrical antibacterial unit 20 (the outer shape is substantially cylindrical). . As shown in FIG. 1, the antibacterial portion 5 is disposed at a position close to the downstream side of the hollow fiber membrane module 4, that is, located just above the portion where the end surface of the hollow fiber membrane is open. 1 is detachably mounted.

  The antibacterial ion eluting member 19 in which a silver and / or copper compound eluting an antibacterial metal ion such as silver or copper is attached to a base material is filled in the substantially annular cylindrical antibacterial unit 20, and its upstream side. The partition wall (lower side in FIG. 1) close to the hollow fiber membrane end face opening portion is made of a filter material (antibacterial unit filter 21) that does not allow the material containing antibacterial metal ions to pass through and allows water to pass.

  As a potting agent for the end surface (cut surface) of the hollow fiber membrane, generally, a curable resin that easily propagates bacteria is used. Therefore, in order to suppress the growth of bacteria in the vicinity of this portion (resin fixing portion 16), an antibacterial agent is used. It is preferable to provide the portion 5 at a position immediately above (on the downstream side) directly above the end surface of the hollow fiber membrane.

  The position where the water passage for allowing the purified water to pass without passing through the antibacterial part may be any part as long as it is inscribed or adjacent to the antibacterial part, but the flow path from the end face part of the hollow fiber membrane is It is preferable to be located in the center of the substantially annular cylindrical antibacterial part so as not to be inhibited.

  When purified water is passed toward the antibacterial unit 5, most or most of it flows through the passage water channel 18 to the purified water supply port 10. Since there is an air vent hole 22 on the downstream side of the antibacterial part 5, it is possible for purified water to flow between the metal ion elution members 19 in the antibacterial part 5, but the passage resistance is smaller than that of the passage water channel. Since it is remarkably large, the inside of the antibacterial part 5 is not substantially passed. As a result, the amount of water in contact with the metal ion eluting member 19 during water flow is significantly reduced, so that the elution life of antibacterial ions from the antibacterial ion eluting member 19 can be extended. Here, the amount of water that contacts the metal ion elution member 19 during water flow significantly decreases when the water flow rate inside the antibacterial ion elution member is 1/5 or less, more preferably 1 / less than the total water flow rate. It is 10 or less, more preferably 1/20 or less. In order to control the water flow rate as described above, the cross-sectional area of the passage water channel may be set according to the water flow rate of the purified water.

  On the upstream side of the antibacterial part 5, in order to partition between the portion filled with the material containing the antibacterial metal ion and the water passage, a filter material that does not pass the material containing the antibacterial metal ion and passes water, for example, A filter material made of thermoplastic fibers is disposed (antibacterial unit filter 21), and an air vent hole 22 for discharging air in the antibacterial part is provided on the upper part (downstream side) of the antibacterial part 5, and the air A filter material for preventing outflow of the filled material is provided in the hole.

  The antibacterial metal ion eluting member 19 is obtained by adhering a single metal and / or metal compound having antibacterial properties such as silver, copper, and zinc to a base material, and can be used as it is or as a molded body using a binder. You may do it. The metal simple substance and / or metal compound exhibits an antibacterial effect and elutes within an acceptable standard range (for example, silver is 0.1 mg / L (= 100 ppb) or less based on drinking water standard of US Environmental Protection Agency EPA). A method of attaching to the base material is preferred. The silver ion elution amount as a whole cartridge is most preferably in the range of 0.005 to 0.1 mg / L, and more preferably in the range of 0.005 to 0.08 mg / L. By controlling the silver ion concentration to 0.005 mg / L or more, the number of general bacteria can be effectively reduced. As the form of the metal compound, the elution amount can be realized when the metal compound is a compound containing any one of a halide salt, a nitrate salt, a sulfate salt, a phosphate salt, a sulfide salt, and an oxide salt.

  Antibacterial metal ions include silver ions, copper ions, and zinc ions. These metal ions have antibacterial properties even when used alone or in combination, but silver ions having antibacterial properties even at relatively low concentrations are most preferably used.

  As the base material, a porous carrier such as activated carbon or zeolite is used. Activated carbon is preferable, and granular activated carbon is more preferable because it has been widely used for water treatment and can be obtained at low cost. As the size of the base material, a size having a surface area or a volume sufficient to attach the antibacterial ion eluting member and having a small water resistance may be selected. For example, in the case of granular activated carbon, about 20 to 150 mesh is preferable. The mesh mentioned here refers to a size that is sieved with a test sieve defined in Japanese Industrial Standard (JIS) Z8801 (1987). 20 mesh corresponds to about 0.85 mm, and 150 mesh corresponds to about 0.1 mm.

  As an antibacterial ion elution member, for example, when it is incorporated in the water purifier of the present invention and tap water is passed at 4 L / min and a temperature of 20 ° C., the antibacterial ion concentration in the purified water discharged from the purified water supply port 10 is Those having a performance of 0.005 to 0.095 mg / L after 6 L of water flow and 0.002 to 0.08 mg / L after 5,000 L of water flow are preferable. Furthermore, it is preferable to stop after 15,000 L water flow, and have an antibacterial ion concentration within the range of 0.005 to 0.08 mg / L in the staying water in the water purifier cartridge after 15 to 70 hours. It is possible to elute the minimum necessary antibacterial ions into the purified water over a period of time.

The amount of the metal simple substance and / or metal compound attached may satisfy the above elution range. The amount of elution varies depending on the water temperature, the water flow rate, etc. When the amount of the simple metal and / or metal compound attached to the base material is generally 0.1 to 5% by weight, preferably 0.3 to 3% by weight, An antibacterial ion elution amount of about 0.002 to 0.1 mg / L is obtained.
When filling the silver-impregnated activated carbon within the range of the amount of adhesion, the amount of filling is 5 to 20 g, preferably 8 to 15 g.

  As an example of a preferred embodiment of the silver-impregnated activated carbon, there can be mentioned silver-impregnated activated carbon having a particle size of 24 to 42 mesh in which granular activated carbon made of coconut shell is used as a base material and 1% by weight of silver compound is impregnated on the surface or inside thereof.

  Next, with respect to the action of the water purifier cartridge 1 configured as described above, refer to FIG. 3 showing a state in which the water purifier cartridge 1 is mounted on the undersink water purifier, and FIG. 1 showing a longitudinal sectional view of the cartridge. While explaining.

  When the water purifier valve 30 provided in the faucet portion 8 is opened, the raw water (tap water) flows into the inside of the water purifier cartridge 1 through the raw water side hose 6 and from the raw water inflow joint 9 through the check valve 25. . The raw water first flows in the axial direction of the water purifier cartridge 1 (downward in the figure), then flows through the primary filter 23, the adsorbent part 3, and the secondary filter 24 in this order, and then flows inward to the hollow fiber membrane module 4 It leads to. The water (purified water) purified by passing through the hollow fiber membrane in the hollow fiber membrane module 4 passes through the water purification passage on the resin fixing portion 16 from the upper end portion of the hollow fiber membrane, and the water passage in the center of the antibacterial portion 5 It flows to the purified water supply port 10 via 18. The flow of water is illustrated with white arrows.

  While passing through the cartridge, disinfectant residual chlorine and organic matter contained in the raw water are removed by the adsorbent unit 3. Next, iron rust and bacteria are removed by the hollow fiber membrane module 4. Thereafter, the water flows through the water passage 18 in the center of the antibacterial part 5 (in this case, water is not substantially passed between the antibacterial ion elution members 19) as purified water from the purified water supply port 10 through the purified water side hose 7, It is discharged from the discharge port of the part 8.

Next, how to assemble the water purifier cartridge shown in FIG. 1 will be described.
First, the check valve 25 is fitted into a predetermined position in the raw water inflow joint 9 (FIG. 2).

  Then, the raw water inflow joint 9 is screwed and fixed to a fitting portion in the vicinity of the raw water inlet 26 of the first housing 12 so that the check valve fitting portion is on the inner side (lower side in FIG. 2). Since the check valve 25 only needs to be positioned and fixed by this screw fitting operation, the raw water inflow joint 9 including the check valve retaining portion 27 and the check valve positioning portion 28 of the first housing 12 and the check valve 25 are included. The structure may be of a rough size and shape that can be easily incorporated and adjusted manually.

  Subsequently, the antibacterial unit 20, the hollow fiber membrane module, the primary filter 23, the secondary filter 24, an adsorbent and the like are incorporated into the first housing 12, and finally the second housing 11 is connected and fixed. In addition, as a fixing method of the first housing 12 and the second housing 11, a known technique such as a screw fitting fixing type may be used as appropriate as in the conventional technique.

  As another assembling method, the antibacterial unit 20, the hollow fiber membrane module, the primary filter 23, the secondary filter 24, an adsorbent and the like are assembled in the first housing 12, and the second housing 11 is fastened and fixed, and then the check valve 25. The raw water inflow joint 9 fitted with may be attached and fixed to the first housing.

  Whichever assembly method is used, the assembly method is simple, but there is an abnormality in the raw water inflow joint 9 including the check valve 25 after assembly (for example, forgetting to fit the check valve 25). The problem can be investigated by removing only the raw water inflow joint 9 from the first housing, and it is not necessary to disassemble the entire water purifier cartridge.

  The primary filter 23, the secondary filter 24, and the antibacterial unit filter 21 serve to fix the adsorbent 3 and the antibacterial ion elution member 19 so as not to leak to the outside and allow water to pass through. Any of them may have a cross-sectional shape of the installation portion (in the case of the figure, a disk shape), and an integrally molded mesh-shaped thermoplastic fiber and a frame-shaped thermoplastic resin may be used. As the thermoplastic fiber, PET (polyethylene terephthalate) fiber is preferably used in view of safety and low cost.

The present invention can be modified as follows.
(1) In the water purifier of the embodiment shown in FIG. 3, the structure having a structure in which only purified water is discharged from the outlet of the faucet portion 8 is described. However, raw water and purified water such as tap water are supplied from a single outlet. It is good also as a thing of the structure which chooses and lets water flow by connecting to the thing of the structure which selects and lets water flow, or hot water supply etc. as well as raw water and purified water.
(2) In the embodiment shown in FIG. 1 and FIG. 3, the water purifier cartridge 1 is installed vertically, but it may be installed by a method such as installing it on the wall as horizontal installation. Moreover, when the filled filter medium reaches the end of its life, a partial cartridge type that can replace only the part that has reached the end of its life may be used.

(3) In the embodiment shown in FIG. 1, the raw water inflow joint and the raw water inlet and the purified water supply port are both configured at the upper part of the housing, but their installation positions can be arbitrarily set, The raw water inflow joint and the raw water inlet may be the lower part and the purified water supply port may be the upper part, or vice versa, or the side part of the housing, and may be appropriately selected according to the installation structure of the filter medium and the outer surface.
(4) In the embodiment shown in FIG. 3, a type (so-called type II water purifier) is described in which the flow path is switched and shielded by the water purifier valve 30 and the tap water pressure is not constantly applied to the water purifier cartridge 1. It may be an I-type water purifier that is always added. In any case, it is preferable to appropriately install a check valve or the like in the flow path so that the purified water does not flow backward.

(5) Although not specifically described in the embodiment shown in FIG. 1 or FIG. 3, the flow state of the flow path on the purified water side is detected, and the flow amount and flow time are integrated and stored, or the cartridge is used. You may have the function to memorize | store start time and to display or warn a cartridge lifetime based on those data. By having such a function, it is possible to use clean water that is user-friendly and safer.

It is a longitudinal cross-sectional view which shows one Embodiment of the cartridge for water purifiers of this invention. It is an expanded longitudinal cross-sectional view which shows the part of the raw | natural water inflow joint in the cartridge for water purifiers shown in FIG. It is a schematic perspective view which shows an example of the water purifier which installed the cartridge for water purifiers shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cartridge for water purifier 2 Housing 3 Adsorbent part 4 Hollow fiber membrane module part 5 Antibacterial part 6 Raw water side hose 7 Purified water side hose 8 Water faucet part 9 Raw water inflow joint 10 Purified water supply port 11 Second housing 12 First housing 13 O-ring 14 O-ring 15 Hollow fiber membrane bundle 16 Resin fixing part 17 Hollow fiber case 18 Passage channel 19 Antibacterial ion elution member 20 Antibacterial unit 21 Filter for antibacterial unit 22 Air vent hole 23 Primary filter 24 Secondary filter 25 Check valve 26 Original Water inlet 27 Check valve retaining portion 28 Check valve positioning portion 29 O-ring 30 Water purifier valve

Claims (5)

A water purifier cartridge containing a filter medium in a housing, the housing comprising a raw water inlet and a check valve retaining portion, a second housing watertightly connected to the first housing, A water purifier cartridge, comprising: a raw water inflow joint connected to a raw water inlet of the first housing; and a check valve disposed on the first housing side in the raw water inflow joint. The water purifier cartridge according to claim 1, further comprising a check valve positioning portion for disposing a check valve at a predetermined position in the raw water inflow joint. The cartridge for water purifier according to claim 1 or 2, wherein the first housing and the raw water inflow joint are fixed by screw fitting. The water purifier cartridge according to any one of claims 1 to 3, wherein a plug for fastening with the one-touch joint is formed on the raw water inflow joint. A water purifier comprising the water purifier cartridge according to claim 1.

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