JP6669579B2 - Water purification cartridge - Google Patents

Description

  The present invention relates to a water purification cartridge.

  BACKGROUND ART Water purifiers for removing impurities such as chlorine contained in tap water are widely used. As the installation form of the water purifier, there are known a faucet direct connection type attached to a faucet tap, a stationary type installed on a sink, and an under sink type (built-in type) installed in a storage cabinet below the sink.

  In particular, as a water purifier used at home, an undersink type water purifier has been receiving attention because of its advantages such as not deteriorating the beauty of the sink. The undersink type water purifier is located in a narrow space in the storage cabinet below the system kitchen, between the top and bottom of the drawer, behind the drawer, etc., in a dead space in the undersink and in a space where the cartridge can be easily replaced. There is a tendency. Therefore, a water purifying cartridge used for an undersink type water purifier is required to have a slim structure having a small outer diameter so that the water purifier can be arranged in the dead space while maintaining the water purifying function.

  As the water purification cartridge, for example, a spacer that holds a granular filter medium such as granular activated carbon in a cylindrical shape in a main body container is provided, and water diverted in the container flows into the spacer from the side and end surfaces of the spacer. A water purification cartridge having an inflow structure has been proposed (Patent Document 1). Further, a water purification cartridge filled with activated carbon, which is arranged in a plurality of elongated pipes in a longitudinal direction in which water flows and is continuous in the longitudinal direction, has been proposed (Patent Document 2).

JP 2008-279450 A JP 2009-233541 A

However, in the water purification cartridge of Patent Literature 1, the granular filter medium such as granular activated carbon is biased in the spacer depending on the installation state such as vertical installation or horizontal installation, so that water passes through the spacer without contacting the filter medium. Water shortage may occur and water purification performance may be insufficient. Further, when the cartridge itself is made thinner and longer and slim, the cross-sectional area of the granular activated carbon layer becomes smaller, so that the pressure loss increases and it becomes difficult to obtain a sufficient filtration flow rate.
In the water purification cartridge of Patent Literature 2, when granular activated carbon is used, the granular activated carbon is biased when placed horizontally, and a short path may occur. In addition, since a plurality of tubes are continuously arranged in the longitudinal direction in the elongated tube, there is a tendency that the pressure loss is large and a sufficient filtration flow rate cannot be obtained. It is conceivable to use shaped activated carbon to suppress the bias of activated carbon. However, shaped activated carbon tends to have a higher raw material cost and a higher pressure loss than granular activated carbon.

  An object of the present invention is to provide a water purification cartridge that can be made slim using granular activated carbon while suppressing excessive increase in pressure loss and occurrence of a short path.

The present invention has the following configuration.
[1] A cylindrical container main body in which a water inlet and a water outlet are formed, and water flowing in from the water inlet passes through the inside in the axial direction from the side opposite to the water outlet toward the water outlet, and the container As a gap is formed between the inner peripheral surface of the main body and a cylindrical spacer member disposed in the container main body so as to be separated from the inner surface of the container main body opposite to the water outlet. A space between the inner surface of the container body opposite to the water outlet and the spacer member, and a granular activated carbon layer formed by filling granular activated carbon inside the spacer member; A water collecting pipe that extends in the axial direction of the container main body so as to be buried in the granular activated carbon layer therein, an opening end formed on the water outlet side communicates with the water outlet, and water flows in from a side surface, Outside the spacer member The wall is provided with a water passage for passing water while blocking the granular activated carbon, and a part of raw water flowing into the container body from the water inlet through the gap from the water collecting pipe to the water outlet. A water purification cartridge that circulates to
[2] A radial distance d1 from the inner peripheral surface of the water passage section to the water collecting pipe, and an end face of the spacer member opposite to the water outlet to an end face of the water collecting pipe opposite to the water outlet. The water purification cartridge according to [1], wherein the ratio (d1 / d2) to the distance d2 is 0.8 to 1.2.
[3] The water purification cartridge according to [1] or [2], wherein an end surface of the water collection pipe opposite to the water outlet is separated from the container body.
[4] The water purification cartridge according to any of [1] to [3], wherein a hollow fiber membrane module is further provided in the container body.
[5] The container main body is disposed in the outer container in a cylindrical outer container having the water inlet and the water outlet formed at a first end, and the spacer member and the water collecting pipe are provided therein. A cylindrical filter medium container on which the granular activated carbon layer is formed, and an outer passage extending from the water inlet to the second end between the inner peripheral surface of the outer container and the outer peripheral surface of the filter medium container. A water channel is formed, and the raw water flowing through the outer water channel passes through the inside of the filter medium container from the second end to the first end to reach the water outlet, [1] to [4]. ] The water purification cartridge according to any one of the above.
[6] The container according to any one of [1] to [4], wherein the water outlet is formed at a first end of the container main body, and the water inlet is formed at a second end of the container main body. Water purification cartridge.
[7] The water purification cartridge according to any one of [1] to [6], wherein an ion exchange fiber is filled in a side of the container main body opposite to the water outlet from the granular activated carbon layer.

  The water purification cartridge of the present invention uses granular activated carbon, and can be made slim while suppressing an excessive increase in pressure loss and occurrence of a short path.

It is the figure which showed an example of the water purification cartridge of this invention, FIG.1 (a) is a front view, FIG.1 (b) is a side view. It is AA sectional drawing of the water purification cartridge of FIG. It is BB sectional drawing of the water purification cartridge of FIG. It is sectional drawing which showed the other example of the water purification cartridge of this invention. It is a side view showing other examples of a water purification cartridge of the present invention. It is CC sectional drawing of the water purification cartridge of FIG. It is a graph which shows the result of the flux test in an example. It is a graph which shows the result of the chloroform filtration ability test in an example.

Hereinafter, an example of the water purification cartridge of the present invention will be described in detail with reference to an example.
As shown in FIGS. 1 and 2, the water purification cartridge 1 of the present embodiment is formed in a cylindrical container main body 10, a cylindrical spacer member 12 arranged in the container main body 10, and inside the container main body 10. And a water collecting pipe 16 provided inside the spacer member 12 in the container body 10.

  The container body 10 includes a cylindrical outer container 18 and a cylindrical filter medium container 20 which is disposed inside the outer container 18, has a spacer member 12 and a water collecting pipe 16 provided therein, and has a granular activated carbon layer 14 formed therein. Have. That is, the container main body 10 has a double structure of the outer container 18 and the filter medium container 20.

  The outer container 18 has a bottomed cylindrical main body portion 22 and a lid portion which is attached to the open end side of the main body portion 22 and has a cylindrical peripheral wall portion 24b protruding from a peripheral edge of the disk-shaped flat plate portion 24a. 24. On the inner surface of the lid portion 24, ribs (not shown) for increasing the strength are provided radially from the center.

  The lid 24 is provided with a water inlet joint 26 and a water outlet joint 28 so as to protrude from the outer surface in the axial direction. The water inlet joint 26 is a tubular member configured to be connected to an IN hose (water inlet coupler) in a liquid-tight manner, and an opening at the tip thereof serves as a water inlet 26a. The water discharge joint 28 is a tubular member configured to be connected to an OUT hose (water discharge coupler) in a liquid-tight manner, and an opening at the tip thereof serves as a water outlet 28a. Thus, in the water purification cartridge 1, the water inlet 26a and the water outlet 28a are formed at the first end 10a of the container body 10.

  As shown in FIG. 1B, the positions of the water inlet joint 26 and the water outlet joint 28 are at positions separated from the outer peripheral edge of the lid 24 toward the center side in a side view when the lid 24 is viewed from the outside in the axial direction. And at a position symmetrical with respect to the central axis of the container body 10. Accordingly, when the lid 24 is welded to the opening end side of the main body 22 by ultrasonic welding, which will be described later, when the horn (not shown) of the ultrasonic apparatus is disposed on the lid 24 side, the water inlet joint 26 and the water outlet are connected. The joint 28 is hardly in the way.

The thickness t of the base end of the peripheral wall portion 24b of the lid portion 24 (FIG. 2), that is, the thickness t from the inner shoulder portion 24d of the lid portion 24 to the outer wall of the side surface of the lid portion 24 is preferably 4 to 6 mm.
In the case of the outer container 18 in which the lid portion 24 provided with the water inlet joint 26 and the water outlet joint 28 is attached to the main body portion 22 and has a small outer diameter and a slim structure, when pressure is applied from the water inlet joint 26, the lid portion 24 Stress concentrates on the inner shoulder 24d, which may be a starting point of breakage. When the thickness t is 4 mm or more, sufficient pressure resistance performance is easily obtained. Further, when the thickness t is 6 mm or less, sink is unlikely to occur during molding, and it is easy to suppress occurrence of poor appearance.

  It is preferable that the main body 22 and the lid 24 are welded by ultrasonic welding. This eliminates the need to provide an O-ring or the like between the main body portion 22 and the lid portion 24, thereby improving workability. When the main body portion 22 and the lid portion 24 are welded by ultrasonic welding, for example, a shear joint or a butt joint can be adopted as a shape of the welding joint. Above all, a share joint is preferable. In the shear joint, the contact surface of the joint and the vibration direction approach the same direction with respect to the longitudinal vibration of the horn, so that bubbles are less likely to be generated on the welding surface. Therefore, the outer container 18 excellent in watertightness and airtightness can be formed.

  Specifically, an ultrasonic welding horn is applied from the water inlet joint 26 and the water outlet joint 28 side of the lid 24, and an axial vibration (longitudinal vibration) of the main body 22 is applied to weld the joint. At this time, in a slim outer container having a small outer diameter, the longitudinal strength of the ultrasonic welding is transmitted to the body portion of the main body portion 22, so that the welding strength tends to decrease. The shape of the welding joint of this example is such that the protruding piece 22a formed over the entire circumference at the upper end of the main body 22 fits into the recess 24c formed over the entire circumference at the tip of the peripheral wall 24b of the lid 24. It has the shape of a share joint. Therefore, the lid portion 24 is attached to the main body portion 22 with high welding strength, and the outer container 18 is more excellent in watertightness and airtightness.

  From the viewpoint of watertightness and airtightness of the outer container, the main body and the lid are preferably welded by vibration welding. Since the vibration welding is lateral vibration, the vibration surface and the adhesive surface of the butt joint are in the same direction, so that bubbles and impurities are less likely to be mixed with the welding surface, and the outer container is more excellent in watertightness and airtightness. However, since the vibration welding apparatus is expensive and time is required for welding, it is preferable to use ultrasonic welding from the viewpoint of production efficiency.

  The second end 18b of the outer container 18 has a hemispherically curved shape so as to protrude toward the first end 18a. Further, as shown in FIG. 3, a plurality of ribs 48 formed of ridges extending radially from the center toward the outer peripheral edge are formed on the inner surface of the second end 18 b of the outer container 18. As a result, since the filter medium container 20 is pushed into the first end portion 18a side by the rib 48 in the outer container 18, it is possible to prevent the connection cylinder 54 of the filter medium container 20 and the inner hole of the water discharge joint 28 from being disengaged. Can be suppressed. Further, the provision of the ribs 48 improves the pressure resistance of the second end portion 18b of the outer container 18.

  The height of the rib 48 from the inner surface of the second end portion 18b is preferably 2 to 5 mm, more preferably 3 to 4 mm. If the height of the rib 48 is equal to or more than the lower limit, the pressure resistance of the second end portion 18b of the outer container 18 tends to be sufficiently high. When the height of the rib 48 is equal to or less than the upper limit value, water flows more easily between the perforated plate 40 and the second end 18 b of the outer container 18.

  The entire length of the container body 10, that is, the length L from the distal ends of the water inlet joint 26 and the water outlet joint 28 to the bottom surface of the outer container 18 can be appropriately set according to the installation location, and is preferably 220 to 300 mm, and preferably 250 to 280 mm. Is more preferred. When the length L is equal to or less than the upper limit, the handleability of the water purification cartridge 1 is improved, and the installation location is not easily limited. When the length L is equal to or more than the lower limit value, it is easy to secure a sufficient amount of the filter medium, and it is easy to obtain practically sufficient water purification performance.

  The maximum diameter d of the container main body 10, that is, the maximum diameter d of the outer container 18 can be appropriately set according to the installation location, and is preferably 70 to 90 mm, more preferably 75 to 80 mm. When the maximum diameter d is equal to or less than the upper limit value, the handleability becomes better, the installation in a narrow space or the like is easy, and the versatility is improved. When the maximum diameter d is equal to or larger than the lower limit, a sufficient amount of the filter medium is easily secured, and practically sufficient water purification performance is easily obtained.

  The ratio (L / d) between the length L of the container body 10 and the maximum diameter d is preferably 2.4 or more and 4.3 or less, more preferably 3.0 or more and 4.0 or less. When L / d is equal to or more than the lower limit, sufficient water purification performance is easily obtained. When L / d is equal to or less than the upper limit, the structure becomes slim, and the water purification cartridge 1 is easily arranged in a small space or the like in the under sink.

The material forming the outer container 18 may be any material that can provide sufficient pressure resistance, and a known material used for a water purification cartridge can be used. Specific examples of the material forming the main body 22 of the outer container 18 include, for example, a thermoplastic resin. As the thermoplastic resin, an ABS resin is preferable because it is particularly excellent in pressure resistance and moldability. As a material for forming the lid portion 24, for example, the same material as that described for the main body portion 22 can be mentioned, and the preferred embodiment is also the same. From the viewpoint of the adhesion between the main body 22 and the lid 24, it is preferable that the main body 22 and the lid 24 are formed of the same material.
The burst pressure of the outer container 18 is preferably 2.0 MPa or more. When an ABS resin is used as a material for forming the outer container 18, the burst pressure can be set to 2.5 MPa or more.

  The filter medium container 20 includes a cylindrical activated carbon storage section 32 in which granular activated carbon is stored, and a cylindrical hollow fiber membrane provided on the first end 10a side of the activated carbon storage section 32 and in which a hollow fiber membrane module 58 is stored. And a storage unit 34.

  The activated carbon accommodating portion 32 includes a cylindrical body 36, a disk-shaped partition plate 38 provided on the side of the first end 10 a of the container body 10 in the body 36, and a second part of the container body 10 in the body 36. A disc-shaped perforated plate 40 provided on the side of the second end 10b. The body 36 and the partition plate 38 and the body 36 and the perforated plate 40 can be joined by, for example, ultrasonic welding.

  The filter medium container 20 is formed between the inner peripheral surface of the outer container 18 and the outer peripheral surface of the filter medium container 20 in an annular shape in the circumferential direction of the container body 10, and has an outer water passage 30 formed of a gap extending in the axial direction of the container body 10. Are arranged to be formed. The outer water passage 30 communicates with a water inlet 26 a of the water inlet joint 26. Raw water flowing into the container body 10 from the water inlet 26a flows through the outer water passage 30 to the second end 10b.

The channel cross-sectional area of the outer flow passage 30, i.e., the area of the cross section perpendicular to the center axis of the container body 10 in the outer water passage 30 is preferably 0.3~8cm ^2, 1.0~5.5cm ² Gayori preferable. When the cross-sectional area of the outer water passage 30 is equal to or larger than the lower limit, the pressure loss can be easily reduced, and a sufficient flow rate of water can be easily secured. When the cross-sectional area of the outer water passage 30 is equal to or less than the upper limit, a sufficient amount of the filter medium can be easily secured, and sufficient water purification performance can be easily obtained.

In this example, it is preferable that the space between the partition plate 38 and the hollow fiber membrane housing portion 34 be watertightly sealed by an O-ring or resin fitting.
An opening 38a is formed in the center of the partition plate 38. Since the opening 38a is formed in the partition plate 38, the inside of the activated carbon storage unit 32 and the inside of the hollow fiber membrane storage unit 34 communicate with each other through the opening 38a.
On the side of the plate 40 of the partition plate 38, a cylindrical water collecting pipe 16 is provided so as to protrude from the periphery of the opening 38a into the activated carbon storage portion 32 of the filter medium container 20. The partition plate 38 and the water collecting pipe 16 can be integrally formed.

  The material forming the body 36 and the partition plate 38 is not particularly limited, and examples thereof include a thermoplastic resin such as an ABS resin.

The perforated plate 40 is formed of a water-permeable member that can pass water while blocking the granular activated carbon.
As the water-permeable member forming the perforated plate 40, a known member generally used in a water purification cartridge can be used, and examples thereof include a water-permeable sheet such as a nonwoven fabric made of polyethylene.

  On the outer peripheral surface of the perforated plate 40, three protruding portions 46 protruding radially toward the outer container 18 are provided at 120-degree intervals around the central axis. Since a gap is formed between the outer peripheral surface of the perforated plate 40 and the inner peripheral surface of the outer container 18 by these projections 46, the raw water flowing through the outer water passage 30 is directed to the second end 18 b side of the perforated plate 40. To flow up to.

  The height of the projection 46 from the outer peripheral surface of the perforated plate 40 is preferably 1.0 mm to 2.0 mm. If the height of the projection 46 is 1.0 mm or more, the gap between the perforated plate 40 and the outer container 18 becomes wider, so that water easily flows to the second end 18b side of the perforated plate 40. Further, even when the water purification cartridge 1 is placed horizontally, the filter medium container 20 is hardly biased in the outer container 18, and the outer water passage 30 is secured uniformly in the circumferential direction, so that the second end 18 b side of the perforated plate 40 is provided. Water is easy to flow up to. If the height of the projections 46 is 2.0 mm or less, the amount of granular activated carbon can be increased, so that sufficient water purification performance is easily obtained.

  In the filter medium container 20, raw water flowing from the water inlet 26a through the outer water passage 30 to the perforated plate 40 side opposite to the water outlet 28a flows into the filter medium container 20 from the perforated plate 40, and the activated carbon storage portion 32, the hollow The water flows in the axial direction toward the water discharge joint 28 in the order of the thread film storage section 34. That is, the raw water flowing through the outer water passage 30 flows into the filter medium container 20 from the perforated plate 40, and passes through the inside in the axial direction from the side opposite to the water outlet 28a toward the water outlet 28a. I have.

  The spacer member 12 is a cylindrical member. The spacer member 12 is provided in the filter medium container 20 so that a gap 42 is formed between the spacer member 12 and the inner peripheral surface of the body portion 36 and is separated from the inner surface of the perforated plate 40. O-rings 44 are provided between the end of the spacer member 12 on the side of the partition plate 38 and the filter medium container 20 and between the end of the spacer member 12 on the side of the plate 40 and the filter medium container 20, respectively. . The gap 42 is formed in an annular shape in the circumferential direction of the filter medium container 20, and extends partway in the axial direction from the partition plate 38 of the filter medium container 20 toward the perforated plate 40.

The outer peripheral wall of the spacer member 12 is provided with a plurality of rectangular water passage portions 12a that pass water while blocking granular activated carbon. As described above, the raw water flowing into the filter medium container 20 can enter and leave between the inside of the spacer member 12 and the gap 42 through the water passage portion 12a at the portion where the spacer member 12 is provided.
The water passage section 12a can be formed, for example, by bonding or fusing a sheet that allows water to pass through but does not allow granular activated carbon to pass through an opening formed in the outer peripheral wall.

  In the activated carbon accommodating portion 32 of the filter medium container 20 in the container main body 10, granular activated carbon is filled in the space between the inner surface of the perforated plate 40 opposite to the water outlet 28a and the spacer member 12, and the inside of the spacer member 12. Thus, a granular activated carbon layer 14 is formed. Since the O-ring 44 is provided between the end of the spacer member 12 on the side of the perforated plate 40 and the filter medium container 20, no granular activated carbon is present in the gap 42.

  The granular activated carbon forming the granular activated carbon layer 14 is not particularly limited, and a known granular activated carbon used for a water purification cartridge can be used. For example, vegetable (wood, cellulose, sawdust, charcoal, coconut shell, ash, etc.), coal (peat, lignite, lignite, bituminous coal, anthracite, tar, etc.), petroleum (oil residue, sulfuric acid sludge, Raw materials such as oil carbon), pulp waste liquid, and synthetic resin are carbonized, and gases (steam, carbon dioxide, air, etc.) and chemicals (calcium chloride, magnesium chloride, zinc chloride, phosphoric acid, sulfuric acid, sodium hydroxide, etc.) are used as necessary. , KOH, etc.). Above all, from the viewpoint of removal ability and handleability, granular activated carbon made of coconut husk as a raw material and impregnated with silver for imparting antibacterial properties is preferred.

  It is preferable that the second end 18b side of the granular activated carbon layer 14 in the filter medium container 20 is further filled with a member having water permeability. Thereby, when the perforated plate 40 side of the filter medium container 20 is pushed in by the second end portion 18b of the outer container 18, the granular activated carbon layer 14 is easily compressed sufficiently toward the first end portion 18a side. For this reason, the granular activated carbon is biased in the filter medium container 20, and it is easy to suppress the formation of a gap leading to a short path in the granular activated carbon layer 14.

The water-permeable member is not particularly limited, and examples thereof include a nonwoven fabric and an ion-exchange fiber. Among them, ion-exchange fibers are preferable, and fibrous activated carbon is more preferable, since soluble lead in raw water can be removed.
Examples of the fibrous activated carbon include, for example, fibrous activated carbon obtained by carbonizing rayon, acrylic fiber, phenol resin, or fiber made from pitch, and then activating the fiber with steam, carbon dioxide, or the like at a high temperature.

  The water collecting pipe 16 is a member into which water flows from the side. The water collecting pipe 16 is arranged on the central axis of the activated carbon storage part 32 and the spacer member 12 of the filter medium container 20 so as to extend in the axial direction of the container main body 10. The water collecting pipe 16 is buried in the granular activated carbon layer 14 inside the spacer member 12. The open end of the water collecting pipe 16 on the side of the partition plate 38 communicates with the water outlet 28 a via the hollow fiber membrane housing 34.

The water collecting pipe 16 can adopt a known mode used for a water purification cartridge. For example, the side surface of the water collecting pipe 16 can be formed of a known sheet that allows water to pass through without passing granular activated carbon.
The end face 16b on the second end 10b side of the water collecting pipe 16 may be sealed so that water does not pass through.

In the activated carbon storage part 32 of the filter medium container 20, raw water flowing through the outer water passage 30 flows from the perforated plate 40, passes through the granular activated carbon layer 14, flows into the water collecting pipe 16, and opens into the partition plate 38. It flows from 38a to the hollow fiber membrane storage part 34.
In the activated carbon storage part 32, the spacer member 12 is provided so as to be separated from the inner surface of the perforated plate 40, and the space between the inner surface of the perforated plate 40 and the spacer member 12 and the inside of the spacer member 12 are filled with granular activated carbon. Have been. Thereby, when the water purification cartridge 1 is placed vertically with the second end 10b downward, the granular activated carbon is biased, and even if there is a gap on the partition plate 38 side in the activated carbon storage unit 32 where no granular activated carbon is present, The raw water flowing from the perforated plate 40 is kept in contact with the granular activated carbon filled in the space between the inner surface of the perforated plate 40 and the spacer member 12. Further, even if the granular activated carbon is biased when the water purification cartridge 1 is placed horizontally, and a gap where no granular activated carbon is present in the upper portion in the activated carbon storage unit 32 in the horizontal state, even if the gap is formed, The raw water that has flowed in and passed through the gap is secured in contact with the granular activated carbon when flowing in the radial direction toward the water collecting pipe 16. As described above, in any of the vertical and horizontal arrangements, even if the granular activated carbon is biased in the container and a gap is formed, a short path occurs in which raw water passes without contacting the granular activated carbon. Can be suppressed. Therefore, by using the water purification cartridge 1, sufficient water purification performance can be obtained.

Further, a gap 42 is formed between the outer peripheral surface of the spacer member 12 and the inner peripheral surface of the body portion 36 in the activated carbon storage portion 32. Thereby, even if the water purification cartridge 1 is made slimmer, the pressure loss is prevented from becoming too high, and a sufficient filtration flow rate can be obtained.
Specifically, a part of the raw water flowing in the activated carbon storage part 32 passes through the granular activated carbon layer 14, does not pass through the water passage part 12 a of the spacer member 12, and does not flow into the gap 42 but in the water collection pipe 16. Flows into. The remaining raw water flowing in the activated carbon storage section 32 passes through the granular activated carbon layer 14, enters the gap 42 from the water passage section 12 a of the spacer member 12, flows through the gap 42 toward the partition plate 38, and then returns again. The water flows into the spacer member 12 from the water passage portion 12 a, passes through the granular activated carbon layer 14, and flows into the water collecting pipe 16. As described above, since a part of the raw water passes through the gap 42, the pressure loss is reduced by diverting compared with the case where the gap 42 is not formed. Can be.

The distance between the gaps 42, that is, the radial distance between the outer peripheral surface of the spacer member 12 and the inner peripheral surface of the activated carbon storage portion 32 is preferably 0.5 to 1.5 mm, more preferably 0.8 to 1.2 mm. If the interval of the gap 42 is equal to or larger than the lower limit, the effect of suppressing an increase in pressure loss becomes higher, and the filtration flow rate can be more easily increased. If the interval between the gaps 42 is equal to or less than the upper limit, the amount of granular activated carbon can be further increased, so that sufficient water purification performance is easily obtained.
The axial length of the gap 42 can be adjusted by adjusting the axial length of the spacer member 12.

  In this example, the end face 16 b of the water collecting pipe 16 opposite to the water outlet 28 a, that is, the end face 16 b opposite to the opening 38 a of the partition plate 38 is separated from the filter medium container 20. Thus, in the present invention, it is preferable that the end face of the water collecting pipe opposite to the water outlet is separated from the container body. By adjusting the length of the water collecting pipe and the shortest distance from the time when water passes through the granular activated carbon layer and flows into the water collecting pipe, it becomes easy to secure sufficient water purification performance.

  A radial distance d1 from the inner peripheral surface of the water passage portion 12a of the spacer member 12 to the water collecting pipe 16 and an end surface 12b of the spacer member 12 opposite to the water outlet 28a from the water outlet 28a of the water collecting pipe 16 to the opposite side. The ratio (d1 / d2) to the distance d2 to the end face 16b is preferably 0.5 to 1.5, and more preferably 0.8 to 1.2. When d1 / d2 is within the above range, the pressure loss when water directly flows into the water collection pipe 16 without passing through the gap 42 and the pressure loss of the path where water flows into the water collection pipe 16 through the gap 42. Is likely to be sufficiently small. Therefore, uneven flow of water is less likely to occur in the activated carbon storage section 32, and raw water is more likely to flow uniformly in the granular activated carbon layer 14, so that the granular activated carbon can be used more effectively.

The hollow fiber membrane storage unit 34 includes a cylindrical body 50 and an inner lid 52 attached to the body 24 on the lid 24 side.
The inner lid portion 52 is provided with a cylindrical connecting cylinder 54 that is inserted into the internal hole of the water discharge joint 28 and communicates with the water discharge joint 28. An O-ring 55 is interposed between the connecting cylinder 54 provided on the inner lid 52 and the internal hole of the water discharge joint 28, thereby ensuring good watertightness.
In this example, the inside diameter of the portion of the internal hole of the water discharge joint 28 into which the connecting cylinder 54 is inserted is larger than the inside diameter of the corresponding portion of the internal hole of the water input joint 26. Thus, even if the connecting cylinder 54 is erroneously connected to the internal hole of the water inlet joint 26 during assembly, the connecting cylinder 54 cannot be inserted into the internal hole of the water inlet joint 26. Therefore, erroneous assembly can be prevented.

The inner lid 52 is provided with a protrusion 56 projecting toward the lid 24 on the center axis of the filter medium container 20. The protrusion 56 is disposed so as to fit into a fitting recess 24 e formed on the central axis of the inner surface of the lid 24. Since the protrusion 56 of the inner lid 52 is fitted into the fitting recess 24 e of the lid 24, rattling of the filter medium container 20 in the outer container 18 is suppressed. In addition, when the water purification cartridge 1 is placed horizontally, for example, the filter medium container 20 is also prevented from being biased in the outer container 18. Furthermore, since the center axis of the filter medium container 20 and the center axis of the outer container 18 can be easily matched, it becomes easier to form the outer water passages 30 at even intervals over the entire circumference of the container body 10 in the circumferential direction. Therefore, the flow of the raw water flowing from the water inlet joint 26 tends to be uniform.
In addition, by providing the protrusion 56 on the inner lid 52 and providing the fitting recess 24 e on the lid 24, a rib provided on the inner surface of the cover 24 can be provided as compared with the case where the protrusion and the fitting recess are provided in reverse. It is easy to make it sufficiently high, and the effect of improving the pressure resistance of the lid portion 24 by the rib is easily obtained.

When the connecting cylinder 54 provided on the inner lid 52 is connected to the inner hole of the water inlet joint 26 and the protrusion 56 is fitted into the fitting concave portion 24 e of the lid 24, the inner tube of the water inlet joint 26 The internal hole of the water discharge joint 28 is separated. As a result, the raw water that has passed through the inner hole of the water inlet joint 26 from the water inlet 26 a does not enter the hollow fiber membrane storage portion 34 of the filter medium container 20 on the first end 10 a side, but passes through the outer water passage 30 to the second end. It is led to the 10b side.
The material for forming the hollow fiber membrane housing section 34 is not particularly limited, and examples thereof include a thermoplastic resin such as an ABS resin.

A hollow fiber membrane module 58 is housed in the hollow fiber membrane housing section 34.
In the hollow fiber membrane module 58, a plurality of hollow fiber membranes 60 folded in a loop are bundled in a cylindrical shape around a center tube 62, and the portion of the hollow fiber membrane 60 on the open end side is formed by a potting layer 64. It is formed by being adhesively fixed to the inner peripheral surface of the body 50 near the inner lid 52. The potting layer 64 is formed so as to separate the inside of the hollow fiber membrane housing section 34 between the activated carbon housing section 32 where the hollow fiber membrane 60 exists and the inner lid section 52 side. As a result, only water that has permeated into the hollow fiber membrane 60 in the hollow fiber membrane housing section 34 reaches the water outlet 28 a of the water joint 28.

Effective membrane area of the hollow fiber membrane 60, i.e. effective filtration area, 0.4～0.8M ² is preferred. The effective membrane area is calculated by the product of the outer diameter of the hollow fiber membrane, the length of the hollow fiber membrane that is not covered by the potting layer, and the number of hollow fiber membranes.
The hollow fiber membrane may be bundled in a U-shaped bundle or may be a Russell knit, but the Russell knit is used because the length of the hollow fiber membrane is easily shortened and the effective membrane area is easily increased. Is preferred.

  As the hollow fiber membrane 60, a known hollow fiber membrane used for a water purification cartridge can be used. Specifically, for example, cellulose-based, polyolefin (polyethylene, polypropylene) -based, polyvinyl alcohol-based, ethylene-vinyl alcohol copolymer, polyether-based, polymethyl methacrylate (PMMA) -based, polysulfone-based, polyacrylonitrile-based, Examples include hollow fiber membranes made of various materials such as polytetrafluoroethylene (Teflon (registered trademark)), polycarbonate, polyester, polyamide, and aromatic polyamide. Among them, a hollow fiber membrane made of a polyolefin-based or polysulfone-based material is preferred from the viewpoints of handleability and processing characteristics.

  The potting material forming the potting layer 64 is not particularly limited, and examples thereof include a urethane resin and an epoxy resin.

The method for manufacturing the water purification cartridge 1 is not particularly limited.
For example, after the water collecting pipe 16 and the partition plate 38 are integrally formed, the spacer member 12 and the body portion 36 are welded to the partition plate 38, and the inside thereof is filled with granular activated carbon to form the granular activated carbon layer 14. Next, a perforated plate 40 is welded to the side of the body 36 opposite to the partition plate 38 to form the activated carbon storage section 32.
Further, the plurality of hollow fiber membranes 60 are bundled in a cylindrical shape around the center tube 62 in a state of being looped back. A potting layer 64 is formed on the opening end side of the hollow fiber membrane 60 using a potting material, and is adhered and fixed to the inner peripheral surface of the end of the body 50. Next, the inner lid portion 52 is welded to the end of the body portion 50 on the side where the potting layer 64 is formed, to form the hollow fiber membrane storage portion 34 in which the hollow fiber membrane module 58 is stored. The activated carbon accommodating section 32 and the hollow fiber membrane accommodating section 34 are watertightly connected by an O-ring or resin fitting to form the filter medium container 20.
Next, the filter medium container 20 is inserted into the main body 22 of the outer container 18, the lid 24 is put on the open end of the main body 22, and the connecting cylinder 54 provided on the inner lid 52 is inserted into the inner hole of the water inlet joint 26. Then, the protrusion 56 is fitted into the fitting recess 24 e of the lid 24. In this state, the water purification cartridge 1 is obtained by welding the main body 22 and the lid 24 by ultrasonic welding or the like.

Hereinafter, a method of using the water purification cartridge 1 will be described.
When using the water purification cartridge 1, first connect the IN hose (water coupler) to the water inlet joint 26 and the OUT hose (water coupler) to the water joint 28, and connect them to a faucet. Install. The water purification cartridge 1 may be placed vertically or horizontally.
Raw water supplied from the IN hose flows into the container body 10 from the water inlet 26a through the water inlet joint 26, and flows outside the filter medium container 20 to the second end 10b through the outer water passage 30. The raw water flowing through the outer water passage 30 flows from the perforated plate 40 in the filter medium container 20 into the activated carbon storage unit 32.

In the activated carbon storage part 32, the raw water flowing from the perforated plate 40 located on the opposite side to the water outlet 28a passes in the axial direction toward the water outlet 28a. Part of the raw water passes through the granular activated carbon layer 14, does not pass through the water passage section 12 a of the spacer member 12, and flows into the water collecting pipe 16 without flowing into the gap 42. The remaining raw water passes through the granular activated carbon layer 14 and once enters the gap 42 from the water passage portion 12a of the spacer member 12, flows through the gap 42 toward the partition plate 38, and then returns from the water passage portion 12a to the spacer member again. 12, passes through the granular activated carbon layer 14, and flows into the water collecting pipe 16. Thus, the raw water is filtered by the granular activated carbon layer 14 in the activated carbon storage section 32.
The water that has flowed into the water collecting pipe 16 passes through the internal water passage 16a and enters the hollow fiber membrane housing portion 34 from the opening 38a of the partition plate 38. In the hollow fiber membrane storage section 34, water is secondarily filtered by the hollow fiber membrane module 58, and reaches the water outlet 28 a of the water outlet joint 28. The water purified by the water purification cartridge 1 is discharged from the water outlet 28a of the water joint 28 and flows to the faucet through the OUT hose.

In the water purification cartridge of the present invention described above, the granular activated carbon is filled in the space between the inner surface of the container body opposite to the water outlet and the spacer member, and the granular activated carbon is filled in the spacer member. Thereby, even if the granular activated carbon is biased in the container body and a gap is formed, the contact between the granular activated carbon and the raw water is ensured in the space or inside the spacer member. Thus, sufficient water purification performance can be obtained by suppressing the occurrence of the short path. Further, since a gap is formed between the outer peripheral surface of the spacer member and the inner peripheral surface of the container body, a part of raw water filtered by the granular activated carbon layer passes through the gap. As a result, the pressure loss is smaller than in the case where no gap is formed, so that a sufficient filtration flow rate can be obtained even when the size is reduced.
In addition, the water purification cartridge of the present invention can make the water purification cartridge slim while suppressing an excessive increase in pressure loss, so that a narrow space in the undersink, specifically, a narrow space in the storage cabinet, between the upper and lower sides of the drawer, It can be easily installed on the back of the drawer, in the bottom drawer, etc.

  The water purification cartridge of the present invention is not limited to the water purification cartridge 1 described above, and various modifications can be made without departing from the spirit of the present invention. For example, the specific configuration of the hollow fiber membrane module can be appropriately changed.

The water purification cartridge of the present invention may have a water outlet formed at the first end of the container body and a water inlet formed at the second end of the container body. For example, the water purification cartridge 2 illustrated in FIG. 4 may be used. 4 that are the same as in FIG. 2 are given the same reference numerals and description thereof is omitted.
The water purification cartridge 2 includes a cylindrical container body 10A, a cylindrical spacer member 12 arranged in the container body 10A, a granular activated carbon layer 14 formed in the container body 10A, and a spacer member in the container body 10A. 12 and a water collection pipe 16 provided inside. The water purification cartridge 2 is the same as the water purification cartridge 1 except that the water purification cartridge 2 is provided with a container body 10A having a single structure instead of the container body 10 having a double structure having the outer container 18 and the filter medium container 20.

The container body 10A includes a body part 74 having a cylindrical body part 70, a disk part 72 formed integrally with the body part 70, and a lid part 76 attached to an open end of the body part 74. ing. In the container main body 10A, the disk portion 72 of the main body 74 is the first end 10a, and the lid 76 is the second end 10b.
The main body 74 and the lid 76 are preferably welded by ultrasonic welding or vibration welding as in the case of the container body 10.

  In the container body 10A, the water discharge joint 28 is provided on the disk portion 72 so as to protrude from the outer surface thereof. Further, the water inlet joint 26 is provided on the lid 76 so as to protrude from the upper surface thereof. That is, in the container body 10A, the water outlet 28a is formed at the first end 10a, and the water inlet 26a is formed at the second end 10b.

The container main body 10A is provided with a cylindrical activated carbon storage portion 32A in which granular activated carbon is stored, and a cylinder in which the hollow fiber membrane module 58 is provided in the body 50, provided on the first end 10a side of the activated carbon storage portion 32A. And a hollow fiber membrane accommodating portion 34A in the shape of a hollow fiber membrane.
The activated carbon accommodating portion 32A in the container main body 10A includes a disk-shaped partition plate 38 provided so as to partition the inside of the main body 74 in the axial direction, and an inner peripheral surface of an end of the body 70 on the side of the lid 76. This is a portion between the eye plate 40 and the eye plate 40. The hollow fiber membrane housing portion 34A in the container body 10A is a portion from the partition plate 38 to the first end 10a. Since the opening 38a is formed in the center of the partition plate 38, the inside of the activated carbon storage section 32A and the inside of the hollow fiber membrane storage section 34A communicate through the opening 38a.

  In the container body 10A, the raw water flowing from the water inlet joint 26 flows in the axial direction toward the water discharge joint 28 in the order of the activated carbon storage part 32A and the hollow fiber membrane storage part 34A. That is, the raw water flowing from the water inlet 26a into the container body 10A passes through the inside in the axial direction from the side opposite to the water outlet 28a toward the water outlet 28a.

  In the activated carbon accommodating portion 32A, the spacer member 12 is formed such that a gap 42A is formed between the outer peripheral surface of the spacer member 12 and the inner peripheral surface of the body portion 70, and is separated from the inner surface of the perforated plate 40. Is provided. O-rings 44 are provided between the end of the spacer member 12 on the side of the partition plate 38 and the body 70, and between the end of the spacer member 12 on the side of the plate 40 and the body 70, respectively. . The gap 42A is annular in the circumferential direction of the container body 10A, and is formed to extend partway in the axial direction from the partition plate 38 of the container body 10A toward the perforated plate 40.

In the activated carbon storage portion 32A of the container body 10A, the space between the inner surface of the perforated plate 40 opposite to the water outlet 28a and the spacer member 12 and the interior of the spacer member 12 are filled with granular activated carbon, and the granular activated carbon layer is formed. 14 are formed. There is no granular activated carbon in the gap 42A.
As in the case of the container body 10, it is preferable to fill a member having water permeability on the second end 18b side of the granular activated carbon layer 14 in the container body 10A. As a result, the granular activated carbon is biased in the container body 10A, and it is easy to suppress the formation of a gap leading to a short path in the granular activated carbon layer 14.

  Similar to the water purification cartridge 1, the water collecting pipe 16 is buried in the granular activated carbon layer 14 so as to extend in the axial direction of the container body 10A on the central axis of the activated carbon storage portion 32A and the spacer member 12.

  As in the case of the water purification cartridge 1, the hollow fiber membrane module 58 is housed in the body 50 of the hollow fiber membrane housing part 34A of the container body 10A. Specifically, a plurality of hollow fiber membranes 60 folded in a loop are bundled in a cylindrical shape around a center tube 62, and the opening end side portions of the hollow fiber membranes 60 are covered by a potting layer 64 to form a trunk. 50 is adhesively fixed to the inner peripheral surface near the first end 10a. An O-ring 51 is arranged between the outer peripheral surface of the trunk 50 and the inner peripheral surface of the trunk 70 to ensure watertightness.

In the water purification cartridge 2, similarly to the water purification cartridge 1, an IN hose (inlet coupler) and an OUT hose (outlet coupler) are connected to the water inlet joint 26 and the water outlet joint 28, respectively, and connected to a faucet. Install inside.
Raw water supplied from the IN hose flows into the container body 10A through the water inlet 26a through the water inlet joint 26, and flows into the activated carbon storage part 32A from the perforated plate 40. In the activated carbon storage section 32A, as in the case of the water purification cartridge 1, part of the raw water passes through the granular activated carbon layer 14 and flows into the water collecting pipe 16 without flowing into the gap 42A. The remaining raw water passes through the granular activated carbon layer 14 and once enters the gap 42A from the water passage portion 12a of the spacer member 12, flows through the gap 42A toward the partition plate 38, and then returns from the water passage portion 12a to the spacer member again. 12, passes through the granular activated carbon layer 14, and flows into the water collecting pipe 16.
The water that has flowed into the water collecting pipe 16 passes through the internal water passage 16a and enters the hollow fiber membrane storage portion 34A from the opening 38a of the partition plate 38. In the hollow fiber membrane accommodating portion 34A, water is secondarily filtered by the hollow fiber membrane module 58, and reaches the water outlet 28a of the water outlet joint 28. The water purified by the water purification cartridge 2 is discharged from the water outlet 28a of the water joint 28, and flows through the OUT hose to the faucet.

  Also in the water purification cartridge 2, the granular activated carbon layer 14 is formed in the space between the spacer member 12 and the space between the inner surface of the container body 10 </ b> A on the side opposite to the water outlet 28 a and the spacer member 12. Therefore, the occurrence of a short path is suppressed. Further, since the pressure loss is reduced by forming the gap 42A, a sufficient filtration flow rate can be obtained even if the gap is reduced.

  The water purifying cartridge in which the water outlet is formed in the first end of the container body and the water inlet is formed in the second end is the water purifier in which the water inlet and the water outlet are formed in the first end of the container main body. Compared to the water purification cartridge, the outer water passage is not provided in the container body, so that the container can be formed into a single structure. On the other hand, the water purification cartridge in which the water outlet is formed at the first end of the container body and the water inlet is formed at the second end becomes difficult to vertically set. Therefore, the water purification cartridge in which the water inlet and the water outlet are formed at the first end of the container body is advantageous in that the water purifier can be placed vertically or horizontally and the degree of freedom of the installation mode is high.

  Although the water purification cartridges 1 and 2 described above have a cylindrical shape, the water purification cartridge of the present invention may have a shape other than the cylindrical shape. For example, the water purification cartridge of the present invention may be the water purification cartridge 3 illustrated in FIGS. 5 and 6. 5 and FIG. 6 that are the same as in FIG. 1B and FIG.

The water purification cartridge 3 is the same as the water purification cartridge 2 except that it has a container body 10B instead of the cylindrical container body 10A.
The container main body 10B includes a main body 84 and a lid 86 attached to an opening end of the main body 84 on the second end 10b side. The main body portion 84 has a cylindrical body portion 80, a disk portion 82 integrally formed with the body portion 80, and a semicircular shape outward from the body portion 80 in a side view viewed from the first end 10 a side. A projecting cylindrical portion 88 provided so as to protrude and extending from the first end 10a of the container body 10B to the second end 10b in the axial direction.

In the container main body 10B, the water discharge joint 28 is provided on the disk portion 82 so as to protrude from the outer surface thereof. Further, the water inlet joint 26 is provided on the first end 10a side of the overhang cylinder portion 88 so as to protrude outward in the axial direction. That is, in the container body 10B, the water inlet 26a and the water outlet 28a are formed at the first end 10a. The inside of the overhang cylinder 88 communicates with the inside of the water inlet joint 26 to form an outer water passage 30A extending from the first end 10a to the second end 10b.
As described above, in the container body 10B, after the outer water passage 30A is formed in the overhanging tube portion 88, and the raw water flowing from the water inlet 26a flows through the outer water passage 30A to the second end 10b side, This is the same mode as the container body 10A, except that it flows into the activated carbon storage part 32A from the perforated plate 40.

  Also in the water purification cartridge 3, since the granular activated carbon layer 14 is formed inside the spacer member 12 and the space between the spacer member 12 and the space between the inner surface of the container body 10 </ b> B on the opposite side to the water outlet 28 a, the water purification cartridge 1 is similar to the water purification cartridge 1. Therefore, the occurrence of a short path is suppressed. Further, since the pressure loss is reduced by forming the gap 42A, a sufficient filtration flow rate can be obtained even if the gap is reduced.

A water purification cartridge having a portion that protrudes from the body of the container main body, such as the overhanging tube portion 88 in the water purification cartridge 3, is advantageous in that it is prevented from rolling by the portion when placed horizontally.
A water outlet is formed at the first end of the container body, a water inlet is formed at the second end, and even in a water purifying cartridge having no external water passage such as the water purifying cartridge 3, the container is provided for preventing rolling. An overhanging portion that projects from the body of the main body may be provided.

  In the water purification cartridges 1 to 3, the hollow fiber membrane module is provided on the downstream side of the granular activated carbon layer. However, in the water purification cartridge of the present invention, even if the hollow fiber membrane module is provided on the upstream side of the granular activated carbon layer. Good. An aspect in which the hollow fiber membrane module is provided on the downstream side of the granular activated carbon layer is preferable from the viewpoint that bacteria and granular activated carbon are easily contained in purified water obtained from the water outlet. Further, the water purification cartridge of the present invention may not be provided with the hollow fiber membrane module.

  The water purification cartridge of the present invention is not limited to a mode in which a water inlet and a water outlet are formed at the first end and the second end of the container main body. The water inlet and the water outlet may be formed in a portion near the second end.

Hereinafter, the present invention will be described in detail with reference to examples, but the present invention is not limited by the following description.
[Example 1]
The water purification cartridge 1 illustrated in FIGS.
An acrylic pipe having an inner diameter of 74 mm was used for the filter medium container 20. The length L of the container body 10 is 300 mm, the maximum diameter d is 100 mm, the ratio (L / d) is 3.0, the interval of the gap 42 is 1 mm, and d1 / d2 is 0.99 (d1 = 25 mm, d2 = 25. 25 mm).
The granular activated carbon layer 14 is provided in the activated carbon storage unit 32 with a granular activated carbon (Kuraray Chemical Co., Ltd.) in the space between the inner surface of the dish 40 opposite to the water outlet 28 a and the spacer member 12 and inside the spacer member 12. TSB48 / 100 THM Lot.No.310-01).
As the hollow fiber membrane 60, a product name “EX270TH-25” manufactured by Mitsubishi Rayon Co., Ltd. was used, and the effective membrane area of the hollow fiber membrane in the hollow fiber membrane module 58 was 0.64 m ² .

[Comparative Example 1]
A water purification cartridge similar to that of Example 1 was produced except that the spacer member 12 was not provided in the activated carbon storage portion 32.

[Flux test]
The prepared water purification cartridge was subjected to 3.0 (liter / min) filtration using A2 grade water adjusted to a water temperature of 20 ± 0.2 ° C. as raw water in accordance with “JIS S 3201: 2010 Test Method for Household Water Purifier”. After continuous water flow at the flow rate for 10 minutes, the instantaneous flow rate (flux, amount flowing per unit time per unit area) was measured. FIG. 7 shows the measurement results of the instantaneous flow rate with respect to the water injection pressure.

  As shown in FIG. 7, in Example 1, a water injection pressure of about 40 kPa was required to obtain an instantaneous flow rate (flux) of 3.0 (liter / minute), whereas in Comparative Example 1, a water injection pressure of about 55 kPa was required. Water injection pressure was required. Thus, the water purification cartridge of Example 1 was able to reduce the pressure loss more than the water purification cartridge of Comparative Example 1.

[Chloroform filtration test]
The water purification cartridge 1 prepared in Example 1 was placed horizontally, and the filtration flow rate was kept constant at 3.0 (liter / minute) in accordance with “JIS S 3201: 2010 Test Method for Household Water Purifier”, and chloroform was used. A filtration capacity test was performed. As raw water, the TOC (total organic carbon) concentration was reduced to 0.5 [mg / liter] or less by activated carbon filtration, the water temperature was 20 ± 0.2 ° C., and the chloroform concentration was 0.060 ± 0.012 (mg / liter). ) Was used. FIG. 8 shows the obtained results.

As shown in FIG. 8, in the water purification cartridge of Example 1, the integrated flow rate (lifetime) until the chloroform removal rate became 80% was about 11,000 liters.
In addition, the chloroform filtration capacity per unit volume of the granular activated carbon used (TSB48 / 100 THM Lot. No. 310-01 manufactured by Kuraray Chemical Co., Ltd.) is 23 L / cc (SV380 / hour). ) Was assumed to be 10810 L. As described above, since the measurement result of the integrated flow rate (lifetime) was substantially equal to the simulation result, in the water purification cartridge of Example 1, the filtration flow rate can be raised without lowering the filter medium efficiency. I understand.

1-3 Water purification cartridge 10, 10A, 10B Container main body 10a First end 10b Second end 12 Spacer member 14 Granular activated carbon layer 16 Water collecting pipe 18 Outer container 18a First end 18b Second end 20 Filter media container 26 Joint 28 Outflow joint 30, 30A Outer water passage 32 Activated carbon storage section 34 Hollow fiber membrane storage section 42, 42A Gap 58 Hollow fiber membrane module 60 Hollow fiber membrane 88 Overhanging cylinder section

Claims (7)

A water inlet and a water outlet are formed, and the water flowing from the water inlet is a cylindrical container body that passes through the inside in the axial direction from the opposite side to the water outlet toward the water outlet,
A cylindrical spacer arranged in the container body such that a gap is formed between the inner peripheral surface of the container body and the inner surface of the container body opposite to the water outlet. Components,
In the container body, a space between the inner surface on the opposite side of the water outlet and the spacer member, and a granular activated carbon layer formed by filling granular activated carbon inside the spacer member,
A water collecting pipe that extends in the axial direction of the container body so as to be buried in the granular activated carbon layer inside the spacer member, an open end formed on the water outlet side communicates with the water outlet, and water flows in from a side surface. With
A water passage is provided on the outer peripheral wall of the spacer member for passing water while damaging the granular activated carbon, and a part of raw water flowing into the container main body from the water inlet through the gap. A water purification cartridge flowing from a water pipe to the outlet.   A radial distance d1 from the inner peripheral surface of the water passage section to the water collecting pipe, and a distance d2 from an end face of the spacer member opposite to the water outlet to an end face of the water collecting pipe opposite to the water outlet. The water purification cartridge according to claim 1, wherein a ratio (d1 / d2) of the water purification cartridge is 0.8 to 1.2.   The water purification cartridge according to claim 1, wherein an end surface of the water collection pipe opposite to the water outlet is separated from the container body.   The water purification cartridge according to any one of claims 1 to 3, wherein a hollow fiber membrane module is further provided in the container body. The container body is a cylindrical outer container having the water inlet and the water outlet formed at a first end portion, and is disposed in the outer container, and the spacer member and the water collecting pipe are provided therein, A cylindrical filter medium container on which a granular activated carbon layer is formed,
An outer water passage extending from the water inlet to a second end is formed between an inner peripheral surface of the outer container and an outer peripheral surface of the filter medium container,
The raw water flowing through the outer water passage, the filter medium container passes from the second end side to the first end side and reaches the water outlet, according to any one of claims 1 to 4, The described water purification cartridge.   The water purification cartridge according to any one of claims 1 to 4, wherein the water outlet is formed at a first end of the container main body, and the water inlet is formed at a second end of the container main body.   The water purification cartridge according to any one of claims 1 to 6, wherein an ion-exchange fiber is filled in a side of the container main body opposite to the water outlet from the granular activated carbon layer.

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