JP2002239541A - Filter cartridge - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a structure of a filter cartridge containing granular activated carbon, has such a defect that filling with the activated carbon is not perfect and filters inserted in the partition plates to prevent the leak of the activated carbon are clogged with forein matters in water and is disadvantageous in cost. SOLUTION: The filter cartridge has a first nonwoven fabric, a first partition plate, a granular activated carbon bed, a second nonwoven fabric and a second partition plate arranged thereto in this order in a water flowing direction. The granular activated carbon bed is held between the first and second nonwoven fabrics and the pertition plates having the nonwoven fabrics fixed thereto have a plurality of arch shapes with respect to a center axis and projections are provided to the leading ends of the partition plates so as be fitted in film case groove parts. By this constitution, stable filtering capacity is imparted because the gaps of granular activated carbon are eliminated and the leak of granular activated carbon is prevented and the filter cartridge advantageous from an aspect of cost and excellent in assembling properties can be provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter cartridge having a structure in which granular activated carbon is incorporated as a filter medium for filtering impurities in tap water, the granular activated carbon is sandwiched by a nonwoven fabric, and the nonwoven fabric is fixed by a partition plate. It is.

[0002]

2. Description of the Related Art In recent years, with the deterioration of tap water quality, consumers are increasingly interested in drinking water, and filters for purifying tap water have become widespread. In addition, a direct connection type water purifier used by directly connecting to the faucet,
It is desired that filter cartridges for stationary water purifiers and water purifiers be reduced in size and weight so as not to interfere with kitchen work. Hereinafter, a filter cartridge of a water purifier of a faucet direct connection type described as a conventional technique has a configuration in which a filter medium for filtering tap water is stored.

[0003] A conventional faucet direct connection type water purifier will be described. Fig. 6 is an external view of a conventional water purifier, Fig. 7 (a) is a longitudinal sectional view of the conventional water purifier, and Fig. 7 (b) is a top view and a cross-sectional view of a conventional water purifier water inlet. In FIG. 6, 1 is a faucet,
Numeral 2 is a joint for connecting the faucet 1 and the water purifier, and numeral 3 is a nut for fixing the water purifier and the joint 2. 4 is the top cover of the water purifier, 5
Is a lower cover of a water purifier, 6 is a cartridge having a built-in filter medium for filtering tap water and detachable from the main body, and provided with a purified water discharge port 9 for filtering tap water with the cartridge 6 and discharging water. Here, the flow of water will be briefly described.
→ B → C → D → E. Next, the internal structure will be described in detail. 7A and 7B, reference numeral 11 denotes a changeover switch housing. The changeover switch housing 11 has a water supply port 11a, and the valve seat 1 is provided below the water supply port 11a.
Purified water inlet 11aa having 1d, purified water outlet 11ba
Is provided in a direction perpendicular to the water supply port 11a, and a cylindrical passage 11c is provided as a passage orthogonal to a passage connected to the raw water straight outflow port 11bb. Numeral 12 denotes a rotary valve stem which is fitted into the cylindrical passage 11c. The rotary valve stem 12 has a water channel groove 12 corresponding to the purified water inlet 11aa.
b, and a projection cam 12a is provided in the channel groove 12b. Reference numeral 13 denotes a synthetic rubber O-ring for separating the water channel grooves 12b. Reference numeral 14 denotes a filter for removing dust and the like contained in tap water flowing into the changeover switch housing 11, and has a large number of filter holes. Reference numeral 15 denotes a synthetic rubber D-ring, which is attached to the valve body 16. Also,
The cross rib 16a provided below the valve body 16 is inserted into the purified water supply port 11aa of the changeover switch housing 11, and the support shaft 11b provided above the valve body 16 is biased to ensure sealing. Springs 17 are attached and inserted into support holes 18a of a receiving plate 18 provided for fixing them. The receiving plate 18 is fixed to the changeover switch housing 11 with screws 23. Reference numeral 20 denotes a connecting pipe which constitutes a water passage for guiding tap water to the cartridge 6. Next, the cartridge 6 detachably connected by a screw structure provided on the connection pipe 20 of the main body will be briefly described. Inside, the first partition plate 24 in which a filter is inserted in order in the flow direction of water, the first partition plate 24,
A non-woven fabric 30, a granular activated carbon layer 21, and a second partition plate 25 in which a filter is inserted are configured on the outer peripheral side, and the hollow fiber membrane 22 is disposed on the inner peripheral side. Further, a flow rate checker 2 for notifying the clogging of the hollow fiber membrane 22 to the outside.
6 is provided on the secondary side of the cartridge 6. The flow rate checker 26 includes a pressure receiving body 27 that receives the discharge pressure of the purified water discharged from the cartridge 6 and a spring 28 that urges the pressure receiving body 27 from the opposite side to the flow direction of the water. It is covered with a transparent casing 29 for confirmation from outside. A route until the clean water is discharged will be briefly described. When the switching lever 10 is in the water purification mode, one valve body 16 is open from the purified water supply port 11aa, and at that time, the other valve body 16 with a cross rib is opened.
Is a raw water straight water supply port 11a by an urging spring 17.
b, The raw water shower water supply port 11ac is closed. Tap water flowing from the faucet 1 passes through the joint 2 and the purified water supply port 1
1aa, and while being guided by the valve body 16, passes through the water channel groove 12b of the rotary valve rod 12, flows into the purified water outlet 11ba, the connection pipe 20, and is provided on the outer peripheral side of the cartridge 6. It passes through the partition plate 24, the first nonwoven fabric 30, the granular activated carbon layer 21, and the second partition plate 25 in order, where impurities and free residual chlorine and the like are removed. The purified water that has flowed into the inside 22 and from which fine turbidity and general bacteria have been removed is discharged from the purified water discharge port 9 after the flow rate is checked by the flow checker 26.

[0004]

In a conventional filtration cartridge having granular activated carbon, a partition plate having a filter inserted therein is disposed before and after the granular activated carbon in order to prevent leakage of the granular activated carbon. However, in order to effectively bring out the performance of the granular activated carbon, it is ideal that the granular activated carbon is filled without gaps. However, the conventional structure has a problem that the granular activated carbon is not completely filled. Further, the filter inserted into the partition plate was sometimes clogged by foreign matter in water. Further, there is a problem that using a partition plate with a filter inserted is disadvantageous in terms of cost.

Accordingly, the present invention solves the above-mentioned conventional problems, and comprises a nonwoven fabric at the entrance and the exit of the granular activated carbon layer, a plurality of arches, and fixed by a partition plate provided with a projection at the tip. It is an object of the present invention to provide a filtration cartridge that has stable filtration performance and is advantageous in cost by adopting a method of performing the above.

[0006]

In order to achieve the above object, a filtration cartridge according to the present invention comprises a first nonwoven fabric, a partition plate, and a granular activated carbon layer in the order of the flow direction of water.
A first partition plate, a granular activated carbon layer, a second nonwoven fabric, and a second partition plate are arranged in this order, and the first nonwoven fabric is held by an inner circumferential rib and an outer receiving surface of a cartridge case and a second case held by a membrane case. The first nonwoven fabric was sandwiched by the first partition plate, the second nonwoven fabric was sandwiched by the granular activated carbon layer and the second partition plate held by the membrane case, and the second partition plate was held by the cover and crushed. Held in state. Further, the partition plate fixing the non-woven cloth has a plurality of arch shapes with respect to a central axis, and a projection for fitting with a membrane case groove portion is provided at a tip thereof, and a taper portion of the membrane case is provided. And a groove for fitting the partition and the partition plate is disposed adjacent to each other. According to the present invention, the gap between the granular activated carbon is eliminated,
Prevents leakage of granular activated carbon due to movement of the nonwoven fabric and leakage of granular activated carbon from the gap between the nonwoven fabric and the case, and uses a partition plate without a filter inserted, providing stable filtration performance and assembling at a cost advantage. It is possible to supply a filtration cartridge having excellent properties.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 is a filter cartridge in which granular activated carbon is incorporated as a filter medium for filtering impurities in tap water, the order of the nonwoven fabric, the partition plate, and the granular activated carbon layer being in the order of water flow. The first nonwoven fabric, the first partition plate, the granular activated carbon layer, the second nonwoven fabric, the second nonwoven fabric,
In the order of the partition plates. According to this configuration, it is possible to eliminate the gap between the granular activated carbon layers and efficiently draw out the filtration ability of the granular activated carbon.

According to a second aspect of the present invention, the first nonwoven fabric is sandwiched between the inner circumferential rib and the outer receiving surface of the cartridge case and the first partition plate held by the membrane case, and the second nonwoven fabric is granular. It is sandwiched between the activated carbon layer and the second partition plate held by the membrane case, and the second partition plate has a configuration held by the cover. According to this configuration, it is possible to prevent the granular activated carbon from leaking due to the inclination of the nonwoven fabric.

According to a third aspect of the present invention, the first and second nonwoven fabrics are held in a crushed state. According to this configuration, it is possible to prevent the granular activated carbon from leaking from the nonwoven fabric and the case.

According to a fourth aspect of the present invention, the partition plate for fixing the non-woven cloth has a plurality of arch shapes with respect to a central axis, and a projection is provided at a tip end thereof. According to this configuration, it is possible to prevent a reduction in filtration life due to clogging of the filter.

According to a fifth aspect of the present invention, the projection of the partition plate is fitted into the recess of the membrane case. According to this configuration, leakage of the granular activated carbon due to displacement of the partition plate can be prevented.

The invention according to claim 6 is configured such that the arch shape and the projection of the partition plate are deformed by the tapered portion provided on the membrane case, and are fitted to the membrane case groove. According to this configuration, assemblability can be improved.

According to a seventh aspect of the present invention, the taper portion of the membrane case and the groove for fitting the partition plate are arranged adjacent to each other. The rib having the projection of the partition plate has a spring property. According to this configuration, assemblability can be improved.

Hereinafter, an embodiment of the filtration cartridge of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an external view of a filter according to one embodiment of the present invention, FIG. 2A is a cross-sectional view of the filter according to one embodiment of the present invention, and FIG. FIG. 3 is a longitudinal sectional view of a filter according to one embodiment, FIG. 3 is an exploded view of parts of a filtration cartridge according to one embodiment of the present invention, and FIG. 4 is a diagram of parts of a partition plate according to one embodiment of the present invention. In the embodiments described below, members corresponding to those of the water purifier described in the related art are denoted by the same reference numerals, and redundant description will be omitted. In FIG. 1, 1 is a faucet, 2 is a joint,
Reference numeral 3 denotes a nut, 4 denotes an upper cover, 5 denotes a lower cover, 6 denotes a cartridge, 9 denotes a purified water discharge port, and 10 denotes a switching lever. The water flowing from the faucet 1 flows from A to B, C, D and E.
Next, details of the inside of the filtration cartridge will be described. 2 (a), 2 (b), 3 and 4, tap water flows into the purified water supply port 11aa from the water supply port 11a, and a detachable filter medium is built in from the purified water outlet 11ba through the water channel groove 12b. Into the cartridge 6, and passes through the first nonwoven fabric 30, the first partition plate 24, the granular activated carbon layer 21, the second nonwoven fabric 31, and the second partition plate 25 provided on the outer peripheral side in this order. Impurities and free residual chlorine are removed,
The purified water, which has been inverted at the end of the cartridge 6 and flows into the hollow fiber membrane 22 provided on the inner peripheral side, and has fine turbidity, general bacteria, etc. filtered, is provided in the secondary-side water purification passage of the cartridge 6. The hollow fiber membrane 22 is discharged from the purified water discharge port 9 through a flow rate checker 26 for notifying the clogging to the outside. The flow rate checker 26 includes a pressure receiving member 27 that receives the discharge pressure of the purified water discharged from the cartridge 6 and a spring 28 that urges the pressure receiving member 27 from the opposite side to the flow direction of the water. It is covered with a transparent casing 29 for confirmation from outside.

Therefore, the structure of the filtration cartridge according to one embodiment of the present invention will be described in detail. As shown in FIG. 3, the order of the nonwoven fabric, the partition plate, and the granular activated carbon layer is such that the first nonwoven fabric 30, the first partition plate 24,
Granular activated carbon layer 21, second nonwoven fabric 31, second partition plate 2
5, the first nonwoven fabric 30 and the second nonwoven fabric 31 have a thickness of 2 to 10 mm, and the granular activated carbon layer 21 is sandwiched between the first and second nonwoven fabrics 30 and 31. I have. Thereby, the gap between the granular activated carbon layers 21 can be eliminated, and the performance of removing the granular activated carbon can be improved.

As shown in FIG. 2, the first nonwoven fabric 30 is sandwiched between the inner circumferential rib 6c and the outer receiving surface 6d of the cartridge case 6a and the first partition plate 24 held by the membrane case 22a. The nonwoven fabric 31 is sandwiched between the granular activated carbon layer 21 and the second partition plate 25 held by the membrane case 22a.
Has a configuration held by the cover 6b. This can prevent the granular activated carbon from leaking due to the inclination of the nonwoven fabric. Further, the first and second nonwoven fabrics 3
Reference numerals 0 and 31 were configured to be held in a state of being crushed by a partition plate. Thereby, the contact portion 6 between the outer peripheral surfaces of the first and second nonwoven fabrics 30 and 31 and the cartridge case is formed.
d, 6e and leakage of the granular activated carbon from the contact portions 22b, 22c between the inner peripheral surfaces of the first and second nonwoven fabrics 30, 31 and the membrane case 22a can be prevented.

As shown in FIG. 4, the first partition plate 24 to which the nonwoven cloth is fixed has a shape having a plurality of arch shapes with respect to the central axis. The second partition plate 25 is also the first partition plate 24.
The same shape as that of the first partition plate 24 may be used. According to this shape, it is possible to prevent a reduction in filtration life due to clogging of the filter. Further, the projection 24a of the partition plate arch-shaped portion of the first partition plate 24 is configured to fit with the membrane case grooves 22d and 22e in FIG. According to this configuration, leakage of the granular activated carbon due to displacement of the partition plate can be prevented.

When the partition plate is inserted into the membrane case, the partition plate arch-shaped portions 24b, 24c and 24d are deformed as shown in FIG. 4 by the membrane case taper portion 22f shown in FIG. 5, and the partition plate arch-shaped portion 24b is formed. The partition plate is deformed in the outer peripheral direction, and the projection 24a of the arch shape portion of the partition plate fits into the groove 22d of the membrane case shown in FIG. According to this configuration, assemblability can be improved.

As shown in FIG. 5, the film case taper portion 22
The groove 22d for fitting the f and the partition plate is arranged adjacent to each other. According to this configuration, assemblability can be improved.

[0021]

According to the present invention, in a filtration cartridge containing granular activated carbon as a filter medium for filtering impurities in tap water, the order of the nonwoven fabric, the partition plate, and the granular activated carbon is the first nonwoven fabric, the 1 partition plate, granular activated carbon,
A second non-woven cloth and a second partition plate are arranged in this order;
Is sandwiched between the circumferential rib of the cartridge case and the first partition plate held by the membrane case, the second nonwoven fabric is sandwiched between the granular activated carbon and the second partition plate, and the second partition plate is covered by the cover. The nonwoven cloth is pushed and held, and the nonwoven cloth is crushed and fixed by a partition plate, and the partition plate has a plurality of arch shapes with respect to a central axis and has a projection for fitting into the membrane case groove. According to the present invention, the filling of the granular activated carbon layer is stabilized, and the filter can be inserted and assembled from one direction without reducing the flow rate by the filter. An excellent filtration cartridge can be provided.

[Brief description of the drawings]

FIG. 1 is an external view of a filter according to an embodiment of the present invention.

FIG. 2A is a cross-sectional view of a filter according to an embodiment of the present invention. FIG. 2B is a longitudinal cross-sectional view of a filter according to an embodiment of the present invention.

FIG. 3 is an exploded view of parts of the filtration cartridge according to the embodiment of the present invention.

FIG. 4 is a diagram showing parts of a partition plate according to an embodiment of the present invention.

FIG. 5 is a detailed view of a membrane case according to the embodiment of the present invention.

FIG. 6 is an external view of a conventional water purifier.

7A is a vertical cross-sectional view of a conventional water purifier. FIG. 7B is a top view and a cross-sectional view of a conventional water purifier water inlet.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Faucet 2 Joint 3 Nut 4 Upper cover 5 Lower cover 6 Cartridge 6a Cartridge case 6b Cover 6c Cartridge case circumferential rib 6d Cartridge case outer receiving surface 6e Cartridge case first nonwoven fabric contact portion 6f Cartridge case second nonwoven fabric Contact portion 7 Raw water straight discharge port 8 Raw water shower discharge port 9 Clean water discharge port 10 Switching lever 11 Changeover switch housing 11a Water supply port 11aa Clean water supply port 11ab Raw water straight water supply port 11ac Raw water shower water supply port 11ad Raw water supply port 11ba Pure water flow outlet 11b Raw water straight outlet 11bc Raw water shower outlet 11bd Raw water outlet 11c Cylindrical passage 11d Valve seat 12 Rotating valve stem 12a Projection cam 12b Water channel 12c Rib 13 O-ring 14 Filter Reference Signs List 5 D ring 16 Valve element 16a Cross rib 16b Support shaft 16c Cylindrical receiving part 17 Energizing spring 18 Receiving plate 18a Supporting hole 19 Changeover switch 20 Connecting pipe 21 Granular activated carbon layer 22 Hollow fiber membrane 22a Membrane case 22b Contact part 22c Contact part 22d Membrane case groove portion 22e Membrane case groove portion 22f Membrane case taper portion 23 Screw 24 First partition plate 24a Partition plate arch-shaped projection 24b Partition plate arch-shaped portion 24c Partition plate arch-shaped portion 25 Second partition plate 26 Flow rate Checker 27 pressure receiver 28 spring 29 transparent casing 30 first nonwoven fabric

 ──────────────────────────────────────────────────の Continued on the front page (72) Inventor Kazuya Kobayakawa 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Yuji Hiraishi 1006 Odaka Kadoma Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72) Inventor E ▲ saki ▼ Yasuhiko 1006 Kadoma, Kazuma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.F-term (reference) 4D006 GA02 GA07 HA01 HA91 KA01 KB12 MA01 PA01 PB06 PC52 4D024 AA02 AB11 BA02 BB01 BC01 CA13 DB05

Claims (7)

[Claims] In a filter cartridge containing granular activated carbon as a filter medium for filtering impurities in tap water, the order of the nonwoven fabric, the partition plate, and the granular activated carbon layer is the first nonwoven fabric, 1 partition plate, granular activated carbon layer,
A filtration cartridge characterized by being arranged in the order of a second nonwoven fabric and a second partition plate. 2. The first nonwoven fabric is sandwiched between an inner circumferential rib and an outer receiving surface of a cartridge case and a first partition plate held by a membrane case, and the second nonwoven fabric is sandwiched between a granular activated carbon layer and a membrane case. The filtration cartridge according to claim 1, wherein the filter is sandwiched between the held second partition plates, and the second partition plate is held by a cover. 3. The method according to claim 1, wherein the first and second nonwoven fabrics are held in a crushed state.
3. The filtration cartridge according to claim 2. 4. The partition plate according to claim 1, wherein said partition plate fixing said non-woven cloth has a plurality of arch shapes with respect to a central axis, and a projection is provided at a tip thereof. Filtration cartridge. 5. The filtration cartridge according to claim 1, wherein the projection of the partition plate is fitted into the groove of the membrane case. 6. The filter cartridge according to claim 1, wherein the arch shape and the projection of the partition plate are deformed by a tapered portion provided on the membrane case, and fitted into the groove of the membrane case. 7. The filtration cartridge according to claim 1, wherein a groove for fitting the tapered portion of the membrane case and the partition plate is arranged adjacent to each other.