JP6739975B2 - Water purification cartridge and water purifier - Google Patents

Description

The present invention relates to a water purification cartridge and a water purifier.

Water purifiers for the purpose of removing impurities such as chlorine contained in tap water are widely used. As the installation form of the water purifier, a faucet direct connection type attached to a faucet of a faucet, a stationary type installed on a sink, and an under-sink type (built-in type) installed in a storage cabinet under the sink are known. In particular, the water purifier with a direct connection to the faucet is required to have higher performance and smaller size.

As a high-performance filter medium, block charcoal formed by molding powdered or fibrous activated carbon is known. However, since block charcoal requires a lot of time and labor for forming, cost is high and there is a limitation in shape. On the other hand, granular or powdered activated carbon is likely to fly up in the cartridge body at the initial stage of water flow, and short paths are likely to occur. Therefore, when using granular or powdery activated carbon, it is necessary to devise so that the activated carbon can be finely packed in the cartridge body.

For example, there has been proposed a water purifier including a water purification cartridge in which a porous elastic body is arranged on the upstream side of an activated carbon layer filled with granular activated carbon in a cartridge body, and a movement of the activated carbon is suppressed (Patent Document 1). Further, there has been proposed a water purifier equipped with a water purification cartridge in which granular activated carbon and a water absorbing polymer are mixed and filled in the cartridge body. In the water purifier, the water-absorbent polymer is suppressed from swelling when water is passed, and voids are prevented from being formed in the filter medium layer (Patent Document 2).

JP-A-9-57250 Japanese Patent No. 3495062

In the water purifier of Patent Document 1, when the height of the activated carbon layer is reduced to reduce the size, a short path easily occurs. In the water purifier of Patent Document 2, the pressure loss tends to be excessively high because the water-absorbent polymer swells.

It is an object of the present invention to provide a water purification cartridge and a water purification device that can suppress the occurrence of short paths while suppressing an excessive increase in pressure loss even if they are downsized.

The present invention provides a water purification cartridge and a water purifier having the following configurations.
[1] A water purification cartridge comprising a cartridge body and an activated carbon layer containing powdered activated carbon formed in the cartridge body,
The ratio of the total mass of the activated carbon of 100 mesh or more to the total mass of the activated carbon layer is 25% by mass or more,
The height of the activated carbon layer is 30 mm or less,
The cartridge body includes a tubular body, a porous elastic body that contacts the upstream side of the activated carbon layer, and a partition member that contacts the downstream side of the activated carbon layer,
The water purification cartridge, wherein the partition member includes a filter, and a partition portion that divides the surface of the filter on the side of the activated carbon layer into two or more sections and is exposed to the side of the activated carbon layer of the filter.
[2] The water purification cartridge according to [1], wherein the body is cylindrical and the partition is provided so as to extend radially from a central portion of the filter.
[3] The water purification cartridge according to [1] or [2], wherein a hollow fiber membrane module is provided on the downstream side of the filter in the cartridge body.
[4] A water purifier including the water purification cartridge according to any one of [1] to [3].

Even if the water purification cartridge of the present invention is downsized, it is possible to suppress the occurrence of short paths while suppressing an excessive increase in pressure loss.
Even if the water purifier of the present invention is miniaturized, it is possible to suppress the occurrence of a short path in the water purification cartridge while suppressing an excessive increase in pressure loss.

It is sectional drawing which showed an example of the water purification cartridge of this invention. It is the figure which showed the filter in the water purification cartridge of FIG. 1, FIG.2(A) is a top view, FIG.2(B) is AA sectional drawing of the filter of FIG.2(A). It is the perspective view which showed an example of the water purifier of this invention. It is BB sectional drawing of the water purifier of FIG. It is the figure which showed the state which opened the upper part of the switching valve in the water purifier of FIG.

[Water purification cartridge]
An example of the water purification cartridge of the present invention will be described below.
As shown in FIG. 1, the water purification cartridge 1 of the present embodiment includes a cartridge body 10, an activated carbon layer 12 formed in the cartridge body 10, and a hollow fiber membrane module 14.

The cartridge body 10 includes a cylindrical body portion 16, a lid body 17 that is provided so as to close the first open end of the body portion 16, and is made of a sintered body that is permeable to raw water, and a lid inside the body portion 16. A porous elastic body 18 provided on the lower side of the body 17 and a partition member 20 provided at an intermediate portion in the body portion 16 in the height direction are provided. A step is formed on the inner wall surface of the body portion 16 such that the inner diameter on the lower side from the intermediate portion in the height direction is smaller than the inner diameter on the upper side. The partition member 20 is installed by being fitted into the step portion of the inner wall surface of the body portion 16 from above.

The filter member can be accommodated in the cartridge body 10 by the partition member 20 in upper and lower two stages. An activated carbon layer 12 is formed in the cartridge body 10 above the partition member 20. A partition member 20 is in contact with the downstream side of the activated carbon layer 12. A porous elastic body 18 is in contact with the upstream side of the activated carbon layer 12. Since the porous elastic body 18 is in contact with the upstream side of the activated carbon layer 12, it is possible to prevent the activated carbon from soaring and forming a short path when water is passed through or when vibration is applied.

Any porous elastic body may be used as long as it has elasticity, does not allow activated carbon to pass through, and allows water to pass through. Specific examples of the porous elastic body include sponges made of synthetic resin such as polyurethane resin and sponge. The form of the porous elastic body may be any as long as it can suppress the movement of activated carbon, and examples thereof include a sheet shape, a plate shape, and a block shape.

As shown in FIGS. 1, 2A and 2B, the partition member 20 includes a filter 22 having a circular shape in a plan view and an annular frame portion 24 that supports an outer peripheral edge portion of the filter 22. And a partition 26 that partitions the inside of the frame 24 into four partitions.

The partition part 26 includes a rod-shaped first partition part 26a and a second partition part 26b, and the first partition part 26a and the second partition part 26b are provided so as to intersect each other vertically in a plan view. As a result, the shape of the partition 26 is located in the center of the annular frame 24, from the central portion 26c where the first partition 26a and the second partition 26b intersect, toward the frame 24. The first partition 26a and the second partition 26b have a shape that extends radially. The partition 26 of this example has the same shape on the upstream side and the downstream side of the filter 22, and supports the filter 22 so as to sandwich it.

In the partition member 20, the surface of the filter 22 on the side of the activated carbon layer 12 is divided into four equal sections by the section 26. Further, the partition 26 is exposed on the side of the filter 22 where the activated carbon layer 12 is arranged. Although the reason is not clear, the surface of the filter on the side of the activated carbon layer is divided into two or more sections by the section in the state where the section is exposed to the side of the activated carbon layer as described above, and thus a short path occurs during water passage. Is suppressed.

In the present invention, as in this example, it is preferable that a cartridge body having a cylindrical body portion is provided with a partitioning member having a partition portion formed so as to extend radially from the central portion of the filter. When the cartridge body is cylindrical, raw water easily passes near the central axis of the activated carbon layer. In the above-described aspect, since the partition portion exists in the central portion of the partition member corresponding to the central axis through which the raw water easily passes, the passage of the raw water passing through the activated carbon layer is likely to be divided into two or more. Although the reason is not clear, this further enhances the effect of suppressing the occurrence of short paths during water passage.

In this example, a step is formed at the boundary between the filter 22 and the part exposed on the activated carbon layer 12 side in the partition 26. In the present invention, it is preferable that a step is formed between the partition and the filter on the activated carbon layer side of the partition member as described above. As a result, the effect of suppressing the occurrence of short paths during water flow is further enhanced.

The height of the step d (FIG. 2(B)) between the partition and the filter on the side of the activated carbon layer is preferably 1 mm or more, more preferably 1 to 2 mm, further preferably 1 to 1.5 mm. If the step d is equal to or more than the lower limit value, the effect of suppressing the occurrence of a short path during water passage becomes higher. In addition, the manufacturing of the partition member becomes easy. When the step d is equal to or less than the upper limit value, it is easy to obtain the effect of suppressing the occurrence of short path.
In the partition member, the partition part and the filter may be flush with each other on the activated carbon layer side.

The material of the frame portion and the partition portion is not particularly limited, and examples thereof include synthetic resins suitable for mass production, such as ABS resin, polycarbonate, acrylic resin, methacrylic resin, polypropylene, polystyrene, MS resin, nylon resin, and poly-4-. Methylpentene-1, polysulfone, polyolefin, polyvinyl chloride, modified PPE, etc. can be used.

The filter may be a porous one through which activated carbon does not pass but water can pass through. Specific examples of the filter include, for example, non-woven fabric and a porous resin sheet made of synthetic resin such as polyethylene terephthalate (PET) resin.

The activated carbon layer 12 is a layer containing 100 mesh or more activated carbon (hereinafter, also referred to as activated carbon (a)). The activated carbon of 100 mesh or more means powdered activated carbon having a particle size that passes through a 100 mesh (mesh opening 0.150 mm) sieve. The activated carbon layer 12 may include activated carbon of less than 100 mesh.

The ratio of the total mass of the activated carbon (a) to the total mass of the activated carbon layer is 25% by mass or more, preferably 25 to 70% by mass, more preferably 25 to 45% by mass. When the ratio of the activated carbon (a) is at least the lower limit value described above, it is possible to suppress the occurrence of short paths during water passage. When the ratio of the activated carbon (a) is equal to or less than the upper limit value, the effect of suppressing the occurrence of short pass can be easily obtained.

The types of activated carbon include, for example, plant matter (wood, cellulose, sawdust, charcoal, coconut shell charcoal, ash, etc.), coal quality (peat, lignite, brown coal, bituminous coal, anthracite, tar, etc.), petroleum quality ( Petroleum residue, sulfuric acid sludge, oil carbon, etc.), pulp waste liquid, synthetic resin, etc. carbonized. As activated carbon, those activated by gas (steam, carbon dioxide, air, etc.) as needed, those activated by chemicals (calcium chloride, magnesium chloride, zinc chloride, phosphoric acid, sulfuric acid, caustic soda, potassium hydroxide, etc.), etc. May be used.
It is preferable that silver is attached to or mixed with the activated carbon. This facilitates suppression of bacterial growth on the activated carbon.

The height H (FIG. 1) of the activated carbon layer is 30 mm or less, preferably 15 to 30 mm, more preferably 20 to 30 mm. If the height H of the activated carbon layer is less than or equal to the upper limit value, the water purification cartridge becomes compact, and the water purifier can be sufficiently miniaturized. When the height H of the activated carbon layer is at least the lower limit value, it becomes easy to obtain sufficient purification performance.

In the water purification cartridge 1, the hollow fiber membrane module 14 is provided below the partition member 20 in the cartridge body 10. The hollow fiber membrane module 14 of this example includes a hollow fiber membrane bundle 28, a center tube 30, and a potting portion 32.

The hollow fiber membrane bundle 28 is formed in a substantially columnar shape by arranging a large number of hollow fiber membranes 28a in a U-shape bent radially from the central portion in a plan view. The hollow fiber membrane bundle 28 is arranged so that the bent portion of each hollow fiber membrane 28a faces the partition member 20 side. The center tube 30 is inserted in the center of the hollow fiber membrane bundle 28. The potting portion 32 is formed so as to close the second open end of the body portion 16 and fix the lower end portion of the hollow fiber membrane bundle 28 and the lower end portion of the center tube 30 to the body portion 16. On the outer surface 32a of the potting portion 32, the end of each hollow fiber membrane 28a is exposed in an open state.

As a material of the hollow fiber membrane, a known material used for a water purifier can be adopted, and examples thereof include cellulose-based, polyolefin-based (polyethylene-based), polyvinyl alcohol-based, PMMA (polymethylmethacrylate)-based, polysulfone-based, and the like. Can be mentioned. Among them, the polyethylene-based hollow fiber membrane is particularly preferable because it has a high strength and elongation and it is easy to increase the curvature by reducing the bending radius r when bending into a U shape.

The material of the center tube is not particularly limited, and examples thereof include the same resins as the materials of the frame portion and the partition portion.
Examples of the potting material that forms the potting portion include epoxy resin, unsaturated polyester resin, polyurethane resin, silicone-based filler, and various hot melt resins.

In the water purification cartridge 1, the raw water penetrates into the cartridge body 10 through the lid body 17 and the porous elastic body 18 arranged on the first opening end side of the body portion 16 of the cartridge body 10. Then, the raw water that has entered the cartridge body 10 passes through the activated carbon layer 12 and passes from the filter 22 portion of the partition member 20 to the hollow fiber membrane module 14 side. Thereafter, the purified water further filtered by the hollow fiber membrane module 14 flows out from the open end of each hollow fiber membrane 28a on the outer surface 32a of the potting portion 32.

The method for producing the water purification cartridge of the present invention is not particularly limited, and a known molding method or the like can be used. Examples of the method of manufacturing the partition member include a method of molding the frame portion and the partition portion by injection molding in a state where the filter is arranged in the mold.

As described above, in the water purification cartridge of the present invention, the porous elastic body is arranged on the upstream side of the activated carbon layer containing activated carbon (a) in a specific ratio and having a height of 30 mm or less. Further, a partition member having a partition surface exposed at the activated carbon layer side and having a filter surface partitioned off is disposed downstream of the activated carbon layer. As a result, the water purification cartridge of the present invention can suppress the occurrence of short paths even if it is downsized. Further, since it is not necessary to mix the water absorbent polymer with the activated carbon layer, it is possible to suppress an excessive increase in pressure loss.

The water purification cartridge of the present invention is not limited to the water purification cartridge 1 described above. For example, the cartridge body may not have a cylindrical shape, and may have a rectangular tube shape, for example. Further, the partition member may not have the frame portion, and the frame portion may have a partial chip.
The water purification cartridge of the present invention may not include the hollow fiber membrane module and may include only the activated carbon layer as the filter medium. The water purification cartridge of the present invention may include a filter medium other than the hollow fiber membrane module in addition to the activated carbon layer.

[Water purifier]
The water purifier of the present invention is a water purifier provided with the water purification cartridge of the present invention. The water purifier of the present invention can employ known aspects except that the water purifier of the present invention is provided. Hereinafter, an example of the water purifier of the present invention will be described based on FIGS. 3, 4, 5(A) and 5(B).

The water purifier 100 of the present embodiment includes a switching valve 110, a water purification unit 112 having a water purification function, and a connection unit 114 connecting the switching valve 110 and the water purification unit 112. The water purifier 100 is capable of letting out raw water to be supplied as it is, or purifying it and letting it out as purified water while being attached to a faucet of a water supply. Hereinafter, for convenience, in the state where the switching valve 110 is located on the left side of the water purification processing unit 112, the front surface side portion of the switching valve 110 is referred to as a first surface portion 110a, and the rear surface side portion is referred to as a second surface portion 110b.

The switching valve 110 includes a switching valve body 116, a switching rotary shaft 118, a switching operation part 120, an adapter 122, a tightening ring 124, a strainer 126, a packing 128, and a support member 130. ..

On the upper part of the switching valve body 116, a bottomed cylindrical upper cylinder part 134 having an open upper end is provided. An inflow chamber 132, into which the fluid flows in through an opening at the upper end, is formed in the upper tubular portion 134. As shown in FIG. 5(A) and FIG. 5(B), a circular first flow path 136 is formed in the bottom of the inflow chamber 132 near the water purification processing unit 112 in plan view. A second flow path 138 is formed on the side farther from the water purification processing unit 112 than the flow path 136 and closer to the second surface 110b.

In the inflow chamber 132, a switching rotary shaft 118 is provided on the side far from the water purification unit 112 so that the axial direction is vertical and reciprocally rotates within a predetermined angle range in plan view. .. A bar-shaped member 140 that extends toward the water purification processing unit 112 side in plan view is connected to the upper end of the switching rotary shaft 118. A columnar valve body 142 that closes the first flow path 136 or the second flow path 138 is provided at the tip of the rod member 140. The switching rotary shaft 118 reciprocally rotates, whereby the valve body 142 is arranged on one of the first flow path 136 and the second flow path 138, so that the flow path is closed. ing.

A support member 130 formed of an annular flat plate having a circular opening formed in the center, a strainer 126, and an annular shape having a circular opening formed in the center above the inflow chamber 132 inside the upper tubular portion 134. Packing 128 is installed in this order from the bottom. The strainer 126 is a mesh member for capturing coarse dust contained in the raw water supplied from the faucet, and is held by being sandwiched by the support member 130 and the packing 128.

Immediately below the upper tubular portion 134 of the switching valve body 116, a raw water storage chamber 144 into which raw water flows from the inflow chamber 132 through the second flow path 138 is formed. A plurality of shower spouts 146 are formed in a specific pattern on the bottom surface of the switching valve body 116. The fluid that has flowed into the raw water storage chamber 144 through the second flow path 138 flows out like a shower from the plurality of shower water discharge ports 146.

A cylindrical switching operation portion 120 is provided outside the upper tubular portion 134 of the switching valve body 116 in the radial direction so as to surround the upper tubular portion 134. The switching operation part 120 has a shape in which the diameter is reduced toward the upper end. The switching operation unit 120 is a rotary member whose rotary shaft reciprocates in a predetermined angle range in the vertical direction when the switching valve 110 is installed in the faucet. That is, the switching operation part 120 is adapted to reciprocally rotate around the upper cylinder part 134.

When the switching operation unit 120 is reciprocally rotated, the switching rotation shaft 118 is reciprocally rotated. For example, when the switching operation unit 120 is rotated right in a plan view, the switching rotation shaft 118 is rotated right and the first flow path 136 is blocked (FIG. 5B), and the switching operation unit 120 is rotated left. Then, the switching rotary shaft 118 rotates counterclockwise to block the second flow path 138 (FIG. 5(A)).

In this example, on the outer peripheral surface 120a of the switching operation unit 120, operation portions 150a and 150b formed of convex portions protruding from the outer peripheral surface 120a are provided at positions facing the central axis in a plan view. Providing the operation units 150a and 150b facilitates the reciprocating rotary motion of the switching operation unit 120.

A tightening ring 124 is screwed onto the upper tubular portion 134 of the switching valve body 116 above the switching operation portion 120. The tightening ring 124 includes a cylindrical tubular portion 124a and an annular projecting portion 124b that projects inward from the upper end of the tubular portion 124a, and an opening is formed inside the projecting portion 124b. .. In addition, a thread groove 124c corresponding to the thread groove 134a formed on the outer peripheral surface of the upper cylinder portion 134 is formed on the inner peripheral surface of the cylinder portion 124a.

When the tightening ring 124 is attached to the upper tubular portion 134 of the switching valve body 116, the adapter 122 is arranged on the packing 128 inside the tightening ring 124. A faucet connecting portion 148 is formed by the upper cylinder portion 134 of the switching valve body 116, the tightening ring 124, the packing 128, and the adapter 122. As described above, in the switching valve 110, the faucet connecting portion 148 connected to the faucet is provided on the switching operation portion 120.

The adapter 122 has an annular upper surface portion 122a having an opening formed in the center, an annular protruding portion 122b hanging from the outer peripheral edge of the upper surface portion 122a over the entire circumference, and an outer circumferential surface extending from the protruding portion 122b over the entire circumference. And a projecting portion 122c provided so as to project. Further, the adapter 122 is configured to be deformed by forming a cut 122d in the vertical direction, and can be attached so as to open from the cut 122d and surround a faucet of water. When the adapter 122 is attached to the tap of the tap with the overhanging portion 122c facing downward, the flange portion protruding outward from the lower end of the tap is located inside the projecting portion 122b of the adapter 122, and the adapter is above the flange portion. The upper surface 122a of 122 is in a hooked state.

The faucet is once passed through the tightening ring 124, and the adapter 122 is attached to the faucet of the tap water with the protruding portion 122c facing downward. The adapter 122 is arranged on the packing 128 arranged inside the upper tubular portion 134. In this state, the tightening ring 124 is screwed on the upper cylinder portion 134. At this time, the projecting portion 122c of the adapter 122 is held by being sandwiched between the projecting portion 124b of the tightening ring 124 and the packing 128. Thereby, the switching valve 110 is attached to the tap of the water supply.

The water purification unit 112 includes a base portion 152, a cylindrical water purification cartridge 1 provided on the base portion 152, and a covered cylindrical cover member 156 provided on the base portion 152 so as to cover the water purification cartridge 1. Equipped with. Outside the water purification cartridge 1 inside the cover member 156 of the water purification unit 112, a raw water flow passage 162 communicating with the first flow passage 136 of the switching valve 110 is formed from below to above the water purification cartridge 1.

Below the water purification cartridge 1, an outflow pipe 176 is connected so as to project downward from the bottom of the water purification cartridge 1 so that the purified water purified in the activated carbon layer 12 and the hollow fiber membrane module 14 flows in. ing. The lower end of the outflow pipe 176 is flush with the bottom surface of the base portion 152, and the opening at the lower end of the outflow pipe 176 serves as a purified water outlet 176a through which purified water flows out.

The connection portion 114 is a portion that connects the switching valve 110 and the water purification processing portion 112. The aspect of the connection part 114 is not particularly limited as long as the first flow path 136 and the raw water flow path 162 are connected to each other inside the connection part 114.

The material of each part of the water purifier 100 is not particularly limited, and known materials can be used. For example, a synthetic resin suitable for mass production, such as transparent ABS resin, polycarbonate resin, methacrylic resin, polypropylene, polystyrene, MS resin, transparent nylon resin, poly-4-methylpentene-1 can be used.

In the water purifier 100, when the switching operation unit 120 is rotated clockwise in plan view, the switching rotation shaft 118 is rotated clockwise and the first flow path 136 is closed. In this state, the raw water supplied from the faucet and flowing into the inflow chamber 132 flows into the raw water storage chamber 144 through the second flow path 138, and is discharged from the plurality of shower spouts 146 in a shower shape.

Further, when the switching operation unit 120 is rotated counterclockwise in plan view, the switching rotary shaft 118 is rotated counterclockwise and the second flow path 138 is closed. In this state, the raw water supplied from the faucet and flowing into the inflow chamber 132 enters the water purification processing unit 112 from the connection portion 114 through the first flow path 136, and enters the water purification cartridge 1 through the raw water flow path 162 from above. Inflow. Then, in the water purification cartridge 1, raw water is purified in order by the activated carbon layer 12 and the hollow fiber membrane module 14, and the purified water purified flows out through the outflow pipe 176 and the purified water outlet 176a.

Since the water purifier of the present invention described above includes the water purification cartridge of the present invention, even if it is downsized, it suppresses an excessive increase in pressure loss and also suppresses the occurrence of a short path in the water purification cartridge. To be done.

Hereinafter, the present invention will be described in detail with reference to Examples, but the present invention is not limited to the following description.
[Evaluation of water purification performance]
A total trihalomethane removal performance test based on JIS S3201 was performed on the water purification cartridge obtained in each example. Water was passed through the water purification cartridge at a flow rate of 1.6 L/min from the side opposite to the side where the partition member was arranged. The evaluation was performed according to the following criteria.
◯: Trihalomethane removal performance is 80% or more.
Δ: Trihalomethane removal performance is 75% or more and less than 80%.
X: Trihalomethane removal performance is less than 75%.

[Activated carbon]
The activated carbons A to C used are shown below.
Activated carbon A: Activated carbon was classified in order by a 60-mesh (opening 0.250 mm) sieve and a 150-mesh (opening 0.106 mm) sieve, and the activated carbon remained on the 150-mesh sieve. The ratio of the total mass of the activated carbon (a) having 100 mesh or more to the total mass of the activated carbon layer was 45% by mass.

Activated carbon B: Activated carbon was classified in order by an 80-mesh (mesh opening 0.180 mm) sieve and a 200-mesh (mesh opening 0.075 mm) sieve, and the activated carbon remained on the 200-mesh sieve. The ratio of the total mass of the activated carbon (a) of 100 mesh or more to the total mass of the activated carbon layer was 28% by mass.

Activated carbon C: Activated carbon was classified in order by a 50 mesh (mesh opening 0.300 mm) sieve and a 100 mesh (mesh opening 0.150 mm) sieve, and the activated carbon remained on the 100 mesh sieve. The ratio of the total mass of the activated carbon (a) of 100 mesh or more to the total mass of the activated carbon layer is less than 0.5% by mass.

[Example 1]
A partition member of the embodiment illustrated in FIGS. 2A and 2B is installed on one open end side of a cylindrical case having a diameter of 46 mm, and activated carbon A is filled on the partition member to form an activated carbon layer. .. The height (stack height) of the activated carbon layer was 30 mm. As the filter of the partition member, a 250-mesh PET resin mesh fabric was used. The height of the step d on the activated carbon layer side between the partition and the filter was 1.5 mm. On the upper side of the activated carbon layer, a non-woven fabric was arranged as a porous elastic body so as to contact the activated carbon layer to obtain a water purification cartridge.
Further, a water purification cartridge of the same mode as described above was produced except that the height H (stacking height) of the activated carbon layer was 25 mm, 20 mm, and 15 mm.

[Comparative Example 1]
Four water purification cartridges were produced in the same manner as in Example 1 except that a filter member having no partition was placed instead of the partition member.

[Comparative example 2]
Four water purification cartridges were produced in the same manner as in Example 1 except that the porous elastic body was not arranged.

Table 1 shows the evaluation results of Example 1 and Comparative Examples 1 and 2 using activated carbon A.

As shown in Table 1, in Example 1 which is the water purification cartridge of the present invention, generation of short paths was suppressed, and thus excellent water purification performance was obtained. Further, in Example 1, the water purification cartridge having the height H of the activated carbon layer of 20 mm or more provided more excellent water purification performance. On the other hand, in Comparative Examples 1 and 2 in which either the partition member or the porous elastic body was not arranged, a short pass occurred and sufficient water purification performance was not obtained.

[Example 2]
Four water purification cartridges were produced in the same manner as in Example 1 except that activated carbon B was used instead of activated carbon A.

[Comparative Example 3]
Four activated water cartridges were produced in the same manner as in Example 1 except that activated carbon B was used instead of activated carbon A, and a filter member having no partition was placed instead of the partition member.

Table 2 shows the evaluation results of Example 2 and Comparative Example 3 using activated carbon B.

As shown in Table 2, in Example 2 which is the water purification cartridge of the present invention, the generation of short paths was suppressed, and thus excellent water purification performance was obtained. Further, in Example 2, the water purification cartridge having a height H of the activated carbon layer of 20 mm or more provided more excellent water purification performance. On the other hand, in Comparative Example 3 in which the partition member was not arranged, a short pass occurred and sufficient water purification performance was not obtained.

[Comparative Example 4]
Activated carbon C was used instead of activated carbon A, and the height H (stack height) of the activated carbon layer was 25 mm in the same manner as in Example 1 except that a filter member having no partition was placed instead of the partition member. Three water purification cartridges of 20 mm and 15 mm were produced.

[Comparative Example 5]
Activated carbon C was used instead of activated carbon A, and the height H (stacking height) of the activated carbon layer was set to 25 mm, 20 mm, and 15 mm in the same manner as in Example 1 except that the porous elastic body was not arranged. Two water purification cartridges were made.

[Comparative Example 6]
Three water purification cartridges having heights H (stack height) of the activated carbon layers of 25 mm, 20 mm, and 15 mm were produced in the same manner as in Example 1 except that activated carbon C was used instead of activated carbon A.

Table 3 shows the evaluation results of Comparative Examples 4 to 6 using activated carbon C.

As shown in Table 3, in Comparative Examples 4 and 5 in which the activated carbon layer did not contain activated carbon of 100 mesh or more, and either the partition member or the porous elastic body was not arranged, a short path occurred and it was sufficient. Water purification performance was not obtained. Further, in Comparative Example 6 in which the activated carbon layer does not contain activated carbon of 100 mesh or more, although both the partition member and the porous elastic body are arranged, a short path occurs and sufficient water purification performance is obtained. There wasn't.

1 Water Purification Cartridge 10 Cartridge Main Body 12 Activated Carbon Layer 14 Hollow Fiber Membrane Module 16 Body 18 Porous Elastic Body 20 Partitioning Member 22 Filter 24 Frame 26 Partitioning 100 Water Purifier

Claims (8)

A water purification cartridge comprising a cartridge body and an activated carbon layer containing powdered activated carbon formed in the cartridge body, comprising:
The ratio of the total mass of the activated carbon of 100 mesh or more to the total mass of the activated carbon layer is 25% by mass or more,
The height of the activated carbon layer is 30 mm or less,
The cartridge body includes a tubular body, a porous elastic body in contact with the upstream side of the activated carbon layer, and a partition member in contact with the downstream side of the activated carbon layer,
The water purification cartridge, wherein the partition member includes a filter and a partition portion that divides the surface of the filter on the side of the activated carbon layer into two or more sections and is exposed to the side of the activated carbon layer of the filter. The water purification cartridge according to claim 1, wherein the body has a cylindrical shape, and the partition is provided so as to extend radially from a central portion of the filter. The water purification cartridge according to claim 1, wherein the partition has the same shape on the upstream side and the downstream side of the filter and supports the filter so as to sandwich the filter. The water purification cartridge according to claim 1, wherein the partition member and the filter are integrated. The water purification cartridge according to any one of claims 1 to 4, wherein a hollow fiber membrane module is provided on the downstream side of the filter in the cartridge body. The water purification cartridge according to claim 5, wherein the hollow fiber membrane module includes a hollow fiber membrane bundle, and the material of the hollow fiber membranes forming the hollow fiber membrane bundle is polyethylene. Water purifier comprising a purification cartridge according to any one of claims 1-6. The water purifier according to claim 7, which is a direct connection type faucet.

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