JP5040279B2 - Water purification cartridge - Google Patents

Description

  The present invention relates to a water purification cartridge that is used in a water purifier.

  2. Description of the Related Art Conventionally, a water purification cartridge used in a water purifier for filtering tap water has a structure in which a plurality of water purification means such as an adsorbent such as activated carbon and a hollow fiber membrane are housed in one cartridge. In particular, many arrangements of the adsorbent and the hollow fiber membrane have been proposed. An example of a conventional product will be described with reference to FIGS.

  The conventional product 1 shown in FIG. 4 has a hollow fiber membrane case 40 in which a hollow fiber membrane bundle 60 is housed in a main body 20 having a raw water inlet 11 on a lower side and a purified water outlet 21 on a lower bottom. The adsorbent 70 is filled in a cylindrical gap that is disposed coaxially with the body 20 and is provided between the main body 20 and the hollow fiber membrane case 40. The adsorbent 70 is held by a filter (not shown) fitted above and below a cylindrical gap (Patent Document 1).

  Raw water enters the inside of the cartridge through the raw water inlet 11 on the side surface, passes upward through the adsorbent 70 filled in the cylindrical gap, and then moves the hollow fiber membrane bundle 60 filled in the hollow fiber membrane case 40 downward. It passes through and flows out from the purified water outlet 21. A space 80 is provided inside the cartridge for changing the direction of water flow by 180 degrees when going from the adsorbent 70 to the hollow fiber membrane case 40.

  As in FIG. 4, the conventional product 2 shown in FIG. 5 has an adsorbent 70 and a hollow fiber membrane case 40 in the body body 20 provided with the raw water inlet 11 on the lower side and the purified water outlet 21 on the lower bottom. Are stored in the vertical direction. The raw water flowing in from the side raw water inlet 11 reaches the upper end of the cartridge through the gap between the main body 20 and the adsorbent 70 and the hollow fiber membrane case 40 accommodated therein, and flows in the space 80 provided at the upper end of the cartridge. The direction is changed, the adsorbent 70 and the hollow fiber membrane case 40 are processed in this order, and the purified water flows out from the purified water outlet 21 (Patent Document 2).

  The conventional product 3 shown in FIG. 6 includes an adsorbent 70 on the upper side and a hollow fiber membrane case 40 on the lower side. The adsorbent 70 is a substantially cylindrical shaped body, in which water flows from the outside to the inside, and a water collection pipe 90 provided on the inside communicates with the hollow fiber membrane case 40 (Patent Document 3).

  The conventional products shown in FIGS. 4 to 6 each change the direction of water flow when water moves from the adsorbent layer to the hollow fiber membrane case. The space for changing the flow direction becomes a dead space for the cartridge.

  7 to 9 each have a structure in which the hollow fiber membrane case 40 is disposed at the axial center position of the cartridge, the adsorbent 70 is provided on the outer periphery thereof, and water is allowed to flow from the outside to the inside. . This point realizes the elimination of the space 80 that changes the direction of water flow compared to the conventional products of FIGS.

  The conventional products 4 and 5 shown in FIG. 7 and FIG. 8 have an outer periphery of the sealing portion 61 so that water does not flow into the sealing portion 61 that seals the hollow fiber membrane bundle 60 inside the hollow fiber membrane case 40. Is not filled with the adsorbent 70. This portion is a dead space, and the space inside the cartridge cannot be effectively used as in FIGS. 4 to 6 (Patent Documents 4 and 5).

  The conventional product 6 shown in FIG. 9 is filled with an adsorbent 70 on the outer periphery using a mesh-like hollow fiber membrane case 40 having an arch shape. Although the cylindrical body 30 is also provided outside the adsorbent 70 to secure the water channel, the specific shape and fixing method of the cylindrical body 30 are not suggested in Patent Document 6 and are feasible. Is difficult.

JP 11-47733 A Japanese Patent Laid-Open No. 9-108861 JP 2004-267839 A Japanese Patent Laid-Open No. 9-150043 Japanese Patent No. 3242395 JP 2004-313964 A

  In the case of the water purification cartridge as shown in FIGS. 4 to 6, it is necessary to provide a space for changing the direction of water flow in order to pass through the adsorbent layer and the hollow fiber membrane case. In particular, in the case of a water purifier with a built-in cartridge, the cartridge shape cannot be changed. Therefore, when the removal performance is improved, there is a problem that a space that cannot be filled with the adsorbent or the hollow fiber membrane becomes a dead space.

  7 to 9 are configured such that water can be passed from the side surface of the hollow fiber membrane case installed at the center of the cartridge, so that a dead space for changing the flow of water as in FIGS. 4 to 6 is avoided. it can. However, in FIG. 7, since water cannot flow through the sealed portion of the hollow fiber membrane, a space corresponding to the sealed portion remains as a dead space. Further, in FIG. 8, since it is necessary to provide an upper and lower holding plate for holding the cylindrical case holding the adsorbent layer and the hollow fiber membrane bundle, a space for holding the holding plate is required separately. Further, there arises a problem that the number of parts increases. Although FIG. 9 does not have a holding plate as shown in FIG. 8, when actually considering the manufacture of this cartridge, there is no description of a method for holding the cylindrical body for holding the adsorbent layer, which is not practical. .

The water purification cartridge of the present invention for achieving the above-described object has the following configurations (1) and (2).
(1) A water purification cartridge having a raw water inlet and a purified water outlet and having an adsorbent layer and a hollow fiber membrane bundle inside, wherein the hollow fiber membrane bundle is bundled in a U shape inside the water purification cartridge. A hollow fiber membrane case with the end portion sealed and fixed is disposed substantially coaxially, and a cylindrical body is formed in a cylindrical space formed between the outside of the hollow fiber membrane case and the inner wall of the water purification cartridge. An adsorbent layer is provided in a substantially cylindrical space formed between the hollow fiber membrane case and the cylindrical body, and between the cylindrical body and the inner wall of the water purification cartridge. gap forming member for forming the flow path has at least provided at the upstream end of the tubular body, said gap forming member is a plurality of projections integrally molded with the tubular body, further wherein The downstream end of the cylindrical body is provided on the inner wall of the end of the water purification cartridge. Purification cartridge characterized in that it is fitted upright in the slit.
(2) A water purification cartridge having a raw water inlet and a purified water outlet, and having an adsorbent layer and a hollow fiber membrane bundle inside, wherein the hollow fiber membrane bundle is bundled in a U shape inside the water purification cartridge. A hollow fiber membrane case with the end portion sealed and fixed is disposed substantially coaxially, and a cylindrical body is formed in a cylindrical space formed between the outside of the hollow fiber membrane case and the inner wall of the water purification cartridge. An adsorbent layer is provided in a substantially cylindrical space formed between the hollow fiber membrane case and the cylindrical body, and between the cylindrical body and the inner wall of the water purification cartridge. gap forming member for forming the flow path has at least provided at the upstream end of the tubular body, said gap forming member, which has a plurality of projections on the ring-shaped outer periphery of the tree butter Further, the end on the downstream side of the cylindrical body is the inner wall of the end of the water purification cartridge Purification cartridge characterized in that it is fitted vertically arranged in a slit provided.

In addition, in the water purification cartridge according to the present invention of (1) and (2), more specifically, preferably, the cartridge has any one of the following configurations (3) to ( 9 ).
( 3 ) Said cylindrical body is comprised from the support frame which has several opening part, and the fabric affixed on the outer periphery of the support frame, The said (1) or (2) characterized by the above-mentioned. Water purification cartridge.
( 4 ) The water purification cartridge as described in ( 3 ) above, wherein the support frame and the fabric of the cylindrical body are integrally formed.
( 5 ) The water purification cartridge according to ( 3 ) or ( 4 ), wherein the fabric is a non-woven fabric.
( 6 ) The water purification cartridge according to any one of (1) to ( 5 ), wherein the fabric has a higher water flow resistance than an adsorbent provided in the water purification cartridge.
( 7 ) The hollow fiber membrane case is provided with a plurality of openings, and a mesh is attached to the inside of the hollow fiber membrane case, according to any one of (1) to ( 6 ) above The water purification cartridge as described.
( 8 ) The water purification cartridge according to ( 7 ), wherein the mesh is integrally formed with a hollow fiber membrane case.
( 9 ) The end of the hollow fiber membrane bundle disposed inside the hollow fiber membrane case and the end of the channel formed between the water purification cartridge and the cylindrical body are: The water purification cartridge according to any one of (1) to ( 8 ), wherein the water purification cartridge is located on the same end side in the water purification cartridge.

  According to the present invention, there is no dead space for changing the direction of water flow inside the cartridge, it can be assembled with a small number of parts, and furthermore, the filling space of the adsorbent and the hollow fiber membrane can be maximized. A compact and high-performance water purification cartridge can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not particularly limited by these drawings.

  FIG. 1 is a schematic longitudinal sectional view schematically showing an embodiment of the water purification cartridge of the present invention. FIG. 2 shows a longitudinal sectional view in a state where the adsorbent 70, the hollow fiber membrane bundle 60 and the sealing portion 61 are removed. FIG. 3 is a schematic external view with a cross section of a part of a cylindrical body 30 to be described later.

  The water purification cartridge 1 has a cylindrical body 30 shown in FIG. 3 and a hollow fiber membrane case 40 on the inner side of the cylindrical body 30 shown in FIG. Has been placed. A gap forming member 32 is provided between the inside of the main body 20 and the cylindrical body 30 in order to ensure a gap. A slit 22 or a cylindrical rib 23 is provided at an end of the main body 20 so that the cylindrical body 30 and one end of the hollow fiber membrane case 40 can be fitted and erected. A cap 50 is fitted into the other end of the cylindrical body 30 and the hollow fiber membrane case 40. The main body lid 10 is in close contact with the opening of the main body 20. The main body lid 10 is provided with a raw water inlet 11, and the main body body 20 is provided with a purified water outlet 21.

  The substantially cylindrical space formed by the cylindrical body 30 and the hollow fiber membrane case 40 is filled with an adsorbent 70 such as activated carbon. Further, inside the hollow fiber membrane case 40, the hollow fiber membrane bundle 60 is bent in a U shape and is sealed and fixed so that the end faces the purified water outlet 21.

  Next, each member will be described.

  The main body 20 is a substantially cylindrical opening at one end, and a purified water outlet 21 is provided at the axial center of the end located on the opposite side of the opening. A cylindrical rib 23 for inserting and standing the hollow fiber membrane case 40 so as to surround the purified water outlet 21, and a slit 22 for inserting and standing the cylindrical body 30 outside the cylindrical rib 23, respectively. It is provided inside the main body 20 in a state where the axial center positions are substantially aligned.

  Here, as shown in FIG. 3, the cylindrical body 30 is provided with a plurality of lattice-shaped openings 31 on the wall surface, and a fabric 35 is attached to the outer periphery thereof. The cylindrical body 30 is preferably made of a resin having high dimensional accuracy at the time of molding, such as ABS (acrylonitrile / butadiene / styrene) resin, AS (acrylonitrile / styrene) resin, or PP (polypropylene) resin. .

  The fabric 35 attached to the outer periphery of the tubular body 30 is preferably attached with an adhesive, thermally fused to the tubular body 30, or integrally formed during molding. In the present invention, since raw water flows from the outside to the inside of the cylindrical body 30, if the fabric 35 is attached to the outer periphery of the cylindrical body 30, there is no possibility of peeling due to the flow of the raw water. Further, as will be described later, since the inside of the cylindrical body 30 is filled with the adsorbent 70 such as granular activated carbon, it can be filled with as much adsorbent 70 as the thickness of the cylindrical body 30. is there.

  The fabric 35 is preferably a material that allows water to pass therethrough and has a basis weight that does not allow the adsorbent 70 to flow out. In consideration of adhesiveness with the cylindrical body 30 formed of resin, it is preferable to use a nonwoven fabric such as PP (polypropylene) or PE (polyethylene).

  The fabric 35 preferably has a higher water resistance than the adsorbent 70 filled inside. In this invention, it has the structure which flows raw | natural water toward the inner side from the outer side of the cylindrical body 30 over the substantially whole length of the axial direction of the main body 20. For this reason, if the water flow resistance of the fabric 35 is set higher than the water flow resistance of the adsorbent 70, the raw water reaches the downstream side of the cylindrical body 30 and then passes through the fabric 35. As a result, the raw water can sufficiently exhibit the adsorption capacity without short-passing the filled adsorbent 70.

  A gap forming member 32 is provided at the upstream end of the cylindrical body 30 in order to ensure a gap through which raw water flows with the inner wall of the main body 20. As the gap forming member 32, a plurality of protrusions integrally formed with the cylindrical body 30, and a protrusion provided on a ring-shaped outer periphery such as a resin, the gap can be easily formed. The gap is preferably 0.5 mm or more in consideration of the molding accuracy of the resin, although it depends on the set flow rate of the water purifier to which the water purification cartridge is attached. When the gap is increased, the raw water flows easily, but on the other hand, the amount of the adsorbent 70 filled is reduced, so that it is preferably 1.5 mm or less, preferably 1.0 mm or less.

  The downstream end of the cylindrical body 30 is fitted and fixed in the slit 22 of the main body 20 described above. Even if the slit 22 does not fix the water tightly, the raw water passes through the adsorbent 70 inside the cylindrical body 30, and therefore it is not necessary to fix the water tight using an O-ring or the like. Therefore, the slit 22 should just ensure the width | variety corresponded to the thickness of the cylindrical body 30, and the depth of the grade which does not fall out. The width and depth of the slit 22 can be minimized as compared with the case where it is fixed watertight with an O-ring or the like, and the amount of the adsorbent 70 filled can be increased accordingly. The width of the slit 22 is preferably about 1 to 2 mm and the depth is about 5 to 10 mm. Furthermore, it is a preferable aspect in that the end on the downstream side of the cylindrical body 30 is ultrasonically welded or fixed with an adhesive, so that it can be fixed more firmly.

  Up to this point, the cylindrical body 30 has been described with respect to the aspect in which the fabric 35 is attached to the outer periphery of the resin molded body. However, the cylindrical body 30 can be modified as follows. That is, the cylindrical body 30 may be formed by winding only the fabric 35 several times, and may be fitted directly into the slit 22 by attaching the resin gap forming member 32 on the upstream side. In this case, it is preferable to use a nonwoven fabric with a large basis weight that does not easily deform when the raw water passes. Moreover, it is also a preferable aspect that the gap forming member 32 is provided at a plurality of positions in the longitudinal direction of the main body 20 as well as the upstream side.

  Next, the hollow fiber membrane case 40 will be described.

  The hollow fiber membrane case 40 has a substantially cylindrical shape with both ends opened, a plurality of lattice-shaped openings 41 are provided on the wall surface, and a mesh 45 is attached to the inner periphery thereof. The material of the hollow fiber membrane case 40 is high in dimensional accuracy at the time of molding, such as ABS (acrylonitrile / butadiene / styrene) resin, AS (acrylonitrile / styrene) resin, PP (polypropylene) resin, etc. What was shape | molded with resin is preferable.

  The mesh 45 is a fabric made of a synthetic fiber such as PP (polypropylene), and has openings at almost equal intervals. The mesh opening can be selected as appropriate. However, if a mesh opening smaller than the particle size of the particles used in the adsorbent 70 described later is selected, the adsorbent 70 will not pass through the mesh 45, so the hollow fiber membrane bundle 60 will be damaged. It is preferable in that there is no.

  As a method of attaching the mesh 45 to the inner peripheral surface of the hollow fiber membrane case 40, a method of integrally forming with the mesh 45 at the time of forming the hollow fiber membrane case 40 is preferable because it can be firmly attached. In this case, if the opening of the mesh 45 is made too small, the resin of the hollow fiber membrane case 40 may not flow into the opening of the mesh 45 and may not be firmly attached. In general, the opening when using ABS resin is preferably 200 mesh or less, and the opening when using PP resin or AS resin is preferably 250 mesh or less. Moreover, it is also a preferable aspect to affix or heat-seal with an adhesive agent.

  By attaching the mesh 45 to the inner peripheral surface of the hollow fiber membrane case 40, the hollow fiber membrane bundle 60 described later can be inserted smoothly without being scratched by the plurality of openings 41. Furthermore, since the adsorbent 70 is filled outside the hollow fiber membrane case 40, the amount of filling can be increased by the thickness of the hollow fiber membrane case 40.

  Inside the hollow fiber membrane case 40 is a sealing portion 61 for sealing and fixing the hollow fiber membrane bundle 60. When the hollow fiber membrane bundle 60 uses a microporous microfiltration (MF) membrane made of polysulfone, polyethylene, or the like, dust and bacteria in raw water can be removed, and a sufficient amount of filtered water can be obtained with low water resistance. It is preferable in that it can be performed. The pore size of the microfiltration (MF) membrane is preferably about 0.1 to 0.3 μm.

  A predetermined number of such hollow fiber membrane bundles 60 are bundled and bent into a U shape, and then inserted into the hollow fiber membrane case 40. At this time, at one end of the hollow fiber membrane case 40, it is also preferable to provide unevenness on the inner wall of the hollow fiber membrane case 40 or to provide a plurality of grooves to increase the adhesion area so as to facilitate sealing. is there. The hollow fiber membrane case 40 and the hollow fiber membrane bundle 60 are sealed and fixed with an adhesive such as urethane or epoxy.

  An O-ring 42 is attached to the end of the hollow fiber membrane case 40 on the side where the sealing portion 61 of the hollow fiber membrane bundle 60 is provided to fix the main body 20 in a watertight manner. The hollow fiber membrane case 40 on the side where the O-ring 42 is attached is inserted into the inside of the cylindrical rib 23 provided inside the main body 20. Since the hollow fiber membrane case 40 is positioned by the cap 50 which will be described later, it is only necessary that the height of the cylindrical ribs 23 is provided to such an extent that the hollow fiber membrane case 40 can be fixed in a watertight manner by the O-ring 42. Accordingly, the filling amount of the adsorbent 70 can be increased. The height is not particularly limited, but is preferably about 5 to 10 mm in that the hollow fiber membrane case 40 can be inserted and fixed without wobbling.

  Next, the adsorbent 70 will be described.

  The adsorbent 70 is filled into a substantially cylindrical space formed by the cylindrical body 30 and the hollow fiber membrane case 40 that are fitted and erected inside the main body 20. As the adsorbent 70, a granular activated carbon made of coconut shell, wood, coal, or the like, a fibrous activated carbon obtained by carbonizing a fiber such as a phenol resin, or a heavy metal in raw water is adsorbed. Zeolite such as suitable titanium silicate and aluminosilicate can be filled in appropriate combination. Preferably, a combination of granular activated carbon made of coconut shell, which has a high packing density and is easily available, and zeolite can absorb a large amount of raw water. When filling the granular adsorbent, the specific surface area increases when the particle size (particle size) is reduced, so that the adsorption capacity can be increased. On the other hand, the water flow resistance becomes high and a predetermined amount of filtered water may not be achieved. In order to satisfy such conflicting conditions, the filling amount and particle size of the adsorbent can be appropriately selected. When the particle size of the granular activated carbon is about 40 to 150 mesh, it is a preferable aspect in that a large amount of raw water can be adsorbed without increasing the water flow resistance.

  The cap 50 prevents the adsorbent 70 filled in the gap between the hollow fiber membrane case 40 and the cylindrical body 30 from leaking to the outside, or prevents the water flowing into the hollow fiber membrane case 40 from mixing with the raw water. It is what you wear. The cap 50 is preferably made of a resin having high dimensional accuracy at the time of molding, such as ABS (acrylonitrile / butadiene / styrene) resin, AS (acrylonitrile / styrene) resin, or PP (polypropylene) resin.

  The shape of the cap 50 preferably has a recess that can be fitted into the end of the hollow fiber membrane case 40. Although it is possible to attach an O-ring for watertight fixation to the end of the hollow fiber membrane case 40, a method of providing and fixing a fitting portion 51 may be used.

  Moreover, it is preferable that the part inserted into the gap filled with the adsorbent 70 has a shape projecting downstream from the end of the hollow fiber membrane case 40. This is because if the shape protrudes in this way, there is no dead space between the filled adsorbent 70 and there is no possibility of shortcut of the adsorbent 70 when the raw water is passed. Protruding about 5 to 10 mm downstream from the end of the hollow fiber membrane case 40 is a preferable aspect in that it can be tightly fixed to the filled adsorbent 70.

  The main body lid 10 has a substantially disk shape having the raw water inlet 11 at the axial position, and after the cylindrical body 30, the hollow fiber membrane case 40, the adsorbent 70, and the cap 50 are filled into the main body body 20. The body body 20 is fixed to the end. The fixing method of the main body lid 10 can be brought into close contact by methods such as ultrasonic welding, screwing, and adhesion using an adhesive. In particular, the use of a resin made of the same material as that of the main body 20 is a preferable aspect in that the welding portion 12 of the main body lid 10 and the welding portion 24 of the main body 20 can be strongly ultrasonically welded.

  A plurality of ribs 13 are provided at equal intervals inside the main body lid 10. The rib 13 has a function of allowing the raw water flowing in from the raw water inlet 11 to flow evenly to the outer periphery of the cylindrical body 30 and fixing the cap 50 so that it does not fall out of the cylindrical body 30 or the hollow fiber membrane case 40. Have.

  The flow of water in the water purification cartridge configured as described above will be described.

  The raw water flowing in from the raw water inlet 11 is diffused almost uniformly in a cylindrical shape along the ribs 13 provided inside the main body lid 10, and is formed by the gap forming member 32 provided in the cylindrical body 30. Raw water flows into the gap with 20. Since the cloth 35 attached to the outer periphery of the cylindrical body 30 has a higher water resistance than the adsorbent 70, the raw water does not easily pass through the cloth 35, and after the raw water reaches the end of the gap, from the end side. Sequentially passes through the fabric 35 and comes into contact with the adsorbent 70. The treated water from which the organic matter in the raw water has been removed by the adsorbent 70 passes through the mesh 45 of the hollow fiber membrane case 40. The purified water from which bacteria and the like contained in the treated water are removed by the hollow fiber membrane bundle 60 passes through the purified water outlet 22 of the main body body 20 from the opening of the hollow fiber membrane bundle 60 provided on the sealing portion 61 side. Spill from.

It is the schematic longitudinal cross-sectional view which showed typically one Example of the water purification cartridge of this invention. It is the schematic longitudinal cross-sectional view which showed the state which removed the hollow fiber membrane bundle, the sealing part, and the adsorbent from the water purification cartridge of FIG. It is a schematic external view which made a part of cylindrical body used for the water purification cartridge of this invention the cross section. It is the schematic longitudinal cross-sectional view which showed typically one Example (conventional product 1) of the conventional water purification cartridge. It is the schematic longitudinal cross-sectional view which showed typically one Example (conventional product 2) of the conventional water purification cartridge. It is the schematic longitudinal cross-sectional view which showed typically one Example (conventional product 3) of the conventional water purification cartridge. It is the schematic longitudinal cross-sectional view which showed typically one Example (conventional product 4) of the conventional water purification cartridge. It is the schematic longitudinal cross-sectional view which showed typically one Example (conventional product 5) of the conventional water purification cartridge. It is the schematic longitudinal cross-sectional view which showed typically one Example (conventional product 6) of the conventional water purification cartridge.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1: Water purification cartridge 10: Main body cover 11: Raw water inflow port 12: Welding part 13: Rib 20: Main body body 21: Purified water outflow port 22: Slit 23: Cylindrical rib 24: Welding part 30: Cylindrical body 31: Opening part 32: Gap forming member 35: Fabric 40: Hollow fiber membrane case 41: Opening portion 42: O-ring 45: Mesh 50: Cap 51: Fitting portion 60: Hollow fiber membrane bundle 61: Sealing portion 70: Adsorbent 80: Space 90: Water collection pipe

Claims (9)

A water purification cartridge having a raw water inlet and a purified water outlet, and having an adsorbent layer and a hollow fiber membrane bundle inside, wherein the hollow fiber membrane bundle is bundled in a U shape inside the purified water cartridge A hollow fiber membrane case sealed and fixed is disposed substantially coaxially, and a cylindrical body is disposed in a cylindrical space formed between the outside of the hollow fiber membrane case and the inner wall of the water purification cartridge. An adsorbent layer is provided in a substantially cylindrical space formed between the hollow fiber membrane case and the cylindrical body, and a flow path is provided between the cylindrical body and the inner wall of the water purification cartridge. A gap forming member for forming is provided at least at an upstream end of the cylindrical body, and the gap forming member is a plurality of protrusions integrally formed with the cylindrical body, and further, the cylindrical body The downstream end of the slot is provided on the inner wall of the end of the water purification cartridge. Purification cartridge characterized in that it is fitted upright on bets. A water purification cartridge having a raw water inlet and a purified water outlet, and having an adsorbent layer and a hollow fiber membrane bundle inside, wherein the hollow fiber membrane bundle is bundled in a U shape inside the purified water cartridge A hollow fiber membrane case sealed and fixed is disposed substantially coaxially, and a cylindrical body is disposed in a cylindrical space formed between the outside of the hollow fiber membrane case and the inner wall of the water purification cartridge. An adsorbent layer is provided in a substantially cylindrical space formed between the hollow fiber membrane case and the cylindrical body, and a flow path is provided between the cylindrical body and the inner wall of the water purification cartridge. gap forming member for forming has at least provided at the upstream end of the tubular body, said gap forming member, which has a plurality of projections on the ring-shaped outer periphery of the tree butter, further The downstream end of the cylindrical body is provided on the inner wall of the end of the water purification cartridge. Purification cartridge characterized in that it is fitted vertically arranged in slits. The water purification cartridge according to claim 1 or 2 , wherein the cylindrical body is composed of a support frame having a plurality of openings and a fabric attached to the outer periphery of the support frame. The water purification cartridge according to claim 3 , wherein the support frame and the fabric of the cylindrical body are integrally formed. The water purification cartridge according to claim 3 or 4 , wherein the fabric is a non-woven fabric. The water purification cartridge according to any one of claims 1 to 5 , wherein the fabric has higher water flow resistance than an adsorbent provided in the water purification cartridge. The hollow fiber membranes case, a plurality of openings are provided, characterized in that it meshes is attached to the inside of the hollow fiber membranes case, water purification cartridge according to any one of claims 1-6. The water purification cartridge according to claim 7 , wherein the mesh is integrally formed with a hollow fiber membrane case. The end portion of the hollow fiber membrane case disposed inside the hollow fiber membrane case and the end portion of the flow path formed between the water purification cartridge and the cylindrical body are the same in the water purification cartridge. It is located in the edge part side, The water purification cartridge in any one of Claims 1-8 characterized by the above-mentioned.

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