JP4299522B2 - Water purifier cartridge and water purifier - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water purifier cartridge and a water purifier for supplying delicious and safe water by removing chlorine, odor-causing substances, harmful substances, and the like contained in tap water and other raw water.
[0002]
[Prior art]
In order to supply safe water, tap water is obliged to add sterilizing chlorine. For this reason, although there is little concern that tap water is contaminated by various germs, the taste of water is impaired by the odor of lime. It has also been confirmed that carcinogenic trihalomethane is produced in tap water by reacting with chlorine and organic substances such as humic substances contained in tap water. And due to pollution of rivers and lakes in recent years, it has been confirmed that tap water using these as raw water contains a mold odor-causing substance such as 2-methylisoborneol as a trace component.
[0003]
In addition, when lead pipes are used in pipes used to distribute tap water, soluble lead elutes from the lead pipes due to stagnation of the tap water, pH, etc., and if this lead is ingested, human health may be impaired. I understand. Water purifiers for removing these substances that impair the taste of water, organic substances and harmful substances are widely used (see, for example, Patent Document 1).
[0004]
[Patent Document 1]
JP, 2001-353486, A In addition to this, various forms of water purifiers are used.
[0005]
FIG. 7 is a cross-sectional view of a conventional water purifier cartridge. As shown by the arrows in the figure, the raw water is supplied from the water inlet 103 and is a member for preventing the granular filter medium 107 from moving to the water inlet 103 side. After passing through the eye plate 105 configured not to pass, it passes through the granular filter medium 107. Thereafter, due to the pressure loss of the particulate filter 107, the water passes through the vicinity of the root portion 108 a of the water collection pipe 108, passes through the hollow fiber membrane module 106, and then purified filtered water is obtained from the discharge portion 104.
[0006]
FIG. 8 is a cross-sectional view showing another example of a conventional water purifier cartridge. In this cartridge, a hollow fiber membrane module 206 and a pre-filter 217 are attached to a core upper lid 216, and a granular filter material 207 is packed between them and sealed by a core lower lid 218. Sealed. The raw water is supplied from the water inlet 203, passes through a gap provided between the prefilter 217 and the main body container 201, and then flows toward the hollow fiber membrane module 206 disposed inside the prefilter 217 to be purified. The filtered water is obtained from the water outlet 204.
[0007]
FIG. 9 is a cross-sectional view showing another example of a conventional water purifier cartridge. In this cartridge, a water collecting pipe 308 is attached to an external spacer 309, a particulate filter medium 307 is packed between them, a filter medium pressing plate 320 is inserted, a nonwoven fabric 322 is further inserted, and then sealed with an external spacer lid 321. The membrane module 306 is attached, these are inserted into the main body container 301, and the bottom lid 302 is attached. The raw water is supplied from the water inlet 303, passes through a gap provided between the bottom lid 302 and the outer spacer 309 from the lower part of the outer spacer 309, and then collects the granular filter material 307 and the collecting material from the peripheral part of the side surface of the outer spacer 309. The filtered water that has passed through the water pipe 308 and has been purified is obtained from the water outlet 304.
[0008]
[Problems to be solved by the invention]
However, in the conventional example shown in FIG. 7, it is difficult for water to pass through to the granular filter medium 107 near the root portion 108a of the water collecting pipe 108 due to pressure loss, and the granular filter medium 107 cannot be effectively used evenly. In this case, the removal performance cannot be obtained, or the cartridge shape becomes unnecessarily large.
[0009]
Further, in the conventional example shown in FIG. 8, the particulate filter material 207 in the vicinity of the hollow fiber membrane module base 219 is not effectively used, and the particulate filter material 207 for obtaining the desired removal performance is unnecessary. This is disadvantageous in terms of industrial production. If the unnecessary particulate filter material 7 in the vicinity of the root portion 219 of the hollow fiber membrane module is eliminated, water flows concentrating on this portion, causing a so-called short path phenomenon, and the intended removal performance cannot be obtained. Due to this structure, it is extremely difficult to make the distance from the hollow fiber membrane module 206 arranged inside the pre-filter 217 very uniform. It cannot be used. Moreover, since the structure is complicated, the number of manufacturing steps and the number of members are large, which is disadvantageous in terms of industrial production.
[0010]
In the conventional example shown in FIG. 9 as well, the granular filter medium 307 in the vicinity of the water collecting pipe root portion 308a is not effectively used, and the granular filter medium 307 for obtaining the desired removal performance is unnecessary. It must be used, which is disadvantageous for industrial production. In order to utilize the granular filter material 307 near the water collecting pipe root portion 308a as effectively as possible, the non-woven fabric 22 for absorbing the dispersion of the filter material pressing plate 320 and the granular filter material 307 is inserted to prevent variation. However, since the structure is complicated, the number of manufacturing steps and the number of members are large, which is disadvantageous in industrial production.
[0011]
In addition, in the case of a water purifier using a granular filter medium, a product with high removal performance is desired due to the demand for compactness of the cartridge for water purifier and improvement of removal performance. Therefore, contact with water with a large specific surface area is desired. Filter media with long particle sizes and small particle sizes have been used.
[0012]
However, if the particle size of the filter medium is reduced to obtain high removal performance, the pressure loss of water increases and the flow rate decreases. In order not to cause a decrease in the flow rate, there is a method of increasing the amount of the filter medium and increasing the amount, but this causes a problem that the water purifier cartridge becomes large.
[0013]
In addition, there is a method in which the flow rate is not reduced by increasing the cross-sectional area of the filter material portion into which water flows, but this still causes a problem that the cartridge for the water purifier becomes large in the radial direction.
[0014]
This invention is made | formed in order to solve said problem, and it aims at providing the effective use of a granular filtration layer, and the compact cartridge for water purifiers and water purifiers with a simple structure.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, the water purifier cartridge of the present invention is a water purifier cartridge comprising a main body container provided with a filter medium, wherein a sheet that allows fluid to pass but not filter medium is disposed. A gap that allows fluid to pass therethrough and does not have the filter medium is formed between the inner wall surface of the main body container .
[0017]
In the water purifier cartridge of the present invention, the sheet may be a mesh, a fibrous sheet, a nonwoven fabric, or a felt.
[0018]
Further, the water purifier cartridge of the present invention has an inflow means in the diversion means for allowing the fluid that has passed through the filter medium in the diversion means to flow into the hollow fiber membrane module housed in the main body container. Also good.
[0019]
Further, in the water purifier cartridge of the present invention, the filtering material is held inside an outer spacer having an opening on the outer peripheral surface, and the sheet is either on the outer peripheral surface side or the inner peripheral surface side of the opening portion of the outer spacer. Either one may be bonded or fused.
[0020]
Further, the water purifier cartridge of the present invention may be one in which a sheet and an external spacer are integrally formed.
[0021]
Moreover, the cartridge for water purifiers of this invention may provide the shaping | molding filter material further in the upstream of an external spacer.
Moreover, the water purifier of this invention uses the cartridge for water purifiers of this invention.
[0022]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 1 is a cross-sectional view showing an embodiment of the water purifier cartridge of the present embodiment.
[0023]
A main body container 1 is provided with a water inlet 3 that is an inlet of raw water to be purified and a water outlet 4 through which the purified filtered water is discharged. Sealed with a ring and detachably mounted.
[0024]
In the main body container 1, a plate 5 that is a member configured to prevent the granular filter material 7 from moving toward the water inlet 3, and to allow water to pass but not to pass the granular filter material 7, A gap 1b is formed between the inner wall 1a of the main body container 1 and an outer spacer 9 for holding the granular filter material 7, a holding container 6a for holding the hollow fiber membrane module 6, and a granular filter material in the outer spacer 9. A water collection pipe 8 is provided for collecting the water that has passed through 7 and flowing it into the holding container 6a.
[0025]
FIG. 2 is a side view of the external spacer of the present embodiment, and FIGS. 3 and 4 are partially enlarged views of the vicinity of the external spacer in a state where it is mounted on the main body container. 3 shows a cross section taken along the line AA in FIG. 2, and FIG. 4 shows a cross section taken along the line BB in FIG.
[0026]
The substantially cylindrical outer spacer 9 having a taper that is narrowed in the mounting direction to the main body container 1 includes ring portions 9a and 9b in which grooves 9c and 9d in which O-rings can be mounted are formed at both ends, and the ring portions. The sheet holding unit 9f is formed integrally with 9a and 9b, and the sheet 14 is bonded or fused to the sheet holding unit 9f and allows water to pass but does not allow the granular filter material 7 to pass.
[0027]
The outer diameter of the sheet holding portion 9f is smaller than that of the ring portions 9a and 9b. When the external spacer 9 is attached to the main body container 1, the outer periphery of the sheet holding portion 9f and the main body container 1 on the ring portion 9a side. A gap 1b of the gap La is formed between the inner wall surface 1a and the gap 1b of the gap Lb on the ring portion 9b side. The gaps La and Lb may be the same, or may be different values as necessary. The gaps La and Lb are distances from the inner wall surface 1a of the main body container 1 to the outer periphery of the sheet holding portion 9f, and the distances from the inner wall surface 1a of the main body container 1 to the surface of the sheet 14 are as shown in FIG. Is generally Lc.
[0028]
When the outer spacer 9 is attached to the main body container 1, the flange portion 9 e formed at the end of the ring portion 9 b contacts the end surface 1 c of the main body container 1 and is positioned. When the outer spacer 9 is attached to the main body container 1, the ring portions 9a, 9b are inscribed in the inner wall surface 1a of the main body container 1, and the ring portions 9a, 9b and the inner wall surface are formed by O-rings attached to the grooves 9c, 9d. It is sealed between 1a.
[0029]
In the manufacturing process of this water purifier, with the open side of the cylindrical main body container 1 opened on one side facing up, the main body 5, the hollow fiber membrane module 6, the water collection pipe 8 and the external spacer 9 are inserted. The granular filter medium 7 is charged and filled from the open top of the container 1. The shape of the main body container 1 is not necessarily limited. For example, the shape of the main body container 1 can be a polygonal column shape, a truncated cone shape, or the like. Since the distance of the water collection pipe | tube 8 can be taken equally, it is more preferable.
[0030]
The method of connecting the main body container 1 and the bottom lid 2 is not necessarily limited, and a method of making a hole in both members and connecting them through bolts can be used. The method of fitting is preferable because the number of parts can be reduced. Regardless of the coupling method, in order to prevent poor fitting due to biting of the thread portion of the granular filter material 7, after the granular filter material 7 is introduced, the non-woven fabric 12 is placed on the top and the bottom lid 2 is then attached. It is preferable to make it fit.
[0031]
Next, how water flows in the water purifier of the present embodiment having the above-described configuration will be described.
[0032]
First, raw water is supplied from the water inlet 3, passes through the eye plate 5, and then passes through the granular filter material 7.
[0033]
Thereafter, as shown in the enlarged cross-sectional view of the water flowing through the granular filter material in FIG. 5, the water that has passed to the outer spacer inlet portion 9g is caused by the particle size of the granular filter material 7 and the opening area of the outer spacer inlet portion 9g. After passing through the inner laminar flow 10 flowing through the granular filter medium 7 in the outer spacer 9 and the outer spacer 9 and the main body container 1 by the pressure resistance, the granular filter medium 7 in the outer spacer 9 is again passed. To the outer laminar flow 11 flowing through
[0034]
The separated inner laminar flow 10 and the outer laminar flow 11 pass through the water collecting pipe 8 provided at the concentric central part of the main body container 1, then pass through the hollow fiber membrane module 6, and the purified filtered water is discharged from the outlet part 4. can get.
[0035]
In this way, by dividing the raw water into the inner laminar flow 10 and the outer laminar flow 11 at the outer spacer inlet 9g, the water flowing through the granular filter medium 7 inside the outer spacer is supplied from the outer spacer inlet 9g to the water collecting pipe root 8a. The inner laminar flow 10 flows between them, and the outer laminar flow 11 flows between the central part of the water collecting pipe 8 and the end 8b of the water collecting pipe, so that the particulate filter 7 is used evenly and effectively, and the substance impairs the taste of water. Moreover, the removal performance of organic substances and harmful substances can be enhanced.
[0036]
The effect of the diversion of the inner laminar flow 10 and the outer laminar flow 11 is not limited to the arrangement direction of the main body container 1, and is effective in any of the vertical, horizontal and oblique directions. Further, in the case of the vertical direction, when the raw water is supplied from the incoming water section 3, there is an effect whether the direction of the raw water flowing is the vertical upward direction or the vertical downward direction.
[0037]
One of the factors that cause the raw water to be split into the inner laminar flow 10 and the outer laminar flow 11 at the outer spacer inlet 9 g is due to the particle size of the granular filter material 7. The particle size of the granular filter medium 7 may be in the range of # 20 to # 200 mesh, preferably in the range of # 30 to # 180 mesh, and more preferably in the range of # 40 to 150 mesh.
[0038]
Examples of the sheet 14 for forming a gap provided between the outer spacer 9 and the main body container 1 used in the water purifier of the present invention can be a mesh, a bonded or fused fibrous sheet, a nonwoven fabric, a felt, and the like. Desirably, a mesh, a bonded or fused fibrous sheet, and a non-woven fabric are preferable.
[0039]
As the granular filter material 7 used in the water purifier of the present invention, powdered activated carbon, granular activated carbon, molecular adsorption resin, zeolite, molecular sieve, chelate resin, ion exchange resin, calcium sulfite, coral sand, barley stone, Ioishi, A tourmaline etc. can be illustrated and the method of using 1 type or 2 types or more of these is mentioned. Desirably, powdered activated carbon, granular activated carbon, zeolite, molecular sieve, ion exchange resin, calcium sulfite, one or more of these are used. This is the case.
[0040]
When this hollow fiber membrane is used, the material of the hollow fiber membrane module 6 is not particularly limited, but is cellulose, polyolefin (polyethylene, polypropylene), polyvinylidene fluoride (PVDF), polyvinyl alcohol, ethylene / vinyl. Alcohol copolymer, polyether, polymethyl methacrylate (PMMA), polysulfone, polyacrylonitrile, polytetrafluoroethylene (PTFE), polycarbonate, polyester, polyamide, aromatic polyamide, etc. The various materials are mentioned. Desirably, polyolefin (polyethylene, polypropylene) and polyvinylidene fluoride (PVDF) can be used, and particularly desirable is the case of using polyolefin (polyethylene, polypropylene).
[0041]
The main body container constituting the water purifier of the present invention is preferably made of a plastic such as ABS resin, AS resin, PP resin, PE resin, polycarbonate resin, etc. in consideration of cost and moldability. The wall thickness is preferably 3 mm or more in consideration of pressure resistance.
(Second Embodiment)
FIG. 6 shows a side sectional view of the water purifier cartridge of the present embodiment.
[0042]
In the cartridge for water purifier of the present embodiment, the molded filter medium 13 is disposed in front of the granular filter medium 7 for the purpose of enhancing the removal performance of substances that impair the taste of water, organic substances, and harmful substances. The water purifier cartridge of the present embodiment is the same as the water purifier cartridge described in the first embodiment, except that the molded filter medium 13 is provided. Therefore, in the following description, the same reference numerals as those in the first embodiment are used.
[0043]
Examples of the molded filter medium 13 include powdered activated carbon, granular activated carbon, fibrous activated carbon, ion exchange fiber, zeolite, molecular sieve, chelate resin, ion exchange resin, calcium sulfite, coral sand, oat stone, Io stone, tourmaline, and the like. , And a method of molding and using one or more of these.
[0044]
Desirably, powdered activated carbon, granular activated carbon, fibrous activated carbon, ion exchange fiber, zeolite, molecular sieve, chelate resin, ion exchange resin, calcium sulfite, one or more of these are used. Particularly desirable are powdered activated carbon, granular activated carbon, fibrous activated carbon, and ion exchange fiber.
[0045]
Also in the present embodiment, as in the first embodiment, water is divided into the inner laminar flow 10 and the outer laminar flow 11, and the granular filter medium 7 is used evenly and effectively. The removal performance of substances and the like can be improved.
[0046]
【The invention's effect】
According to the present invention, in a water purifier cartridge in which a filter medium is disposed in a cylindrical main body container, the flow of fluid passing through the filter medium is caused by pressure caused by the particle diameter of the granular filter medium and the opening area of the external spacer inlet. By diverting in at least two directions by resistance, the flow rate is not reduced while the entire filter medium is effectively used evenly.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of a water purifier cartridge according to a first embodiment of the present invention.
FIG. 2 is an external view of an external spacer according to the first embodiment of the present invention.
FIG. 3 is a partially enlarged view of a water purifier cartridge showing a state in which an external spacer is attached to a main body container.
FIG. 4 is a partially enlarged view of a water purifier cartridge showing a gap formed between a main body container and a sheet material.
FIG. 5 is an enlarged cross-sectional view of water flowing through a granular filter medium.
FIG. 6 is a cross-sectional view showing an example of a water purifier cartridge according to a second embodiment of the present invention.
FIG. 7 is a cross-sectional view showing an example of a conventional water purifier cartridge.
FIG. 8 is a cross-sectional view showing an example of a conventional water purifier cartridge.
FIG. 9 is a cross-sectional view showing an example of a conventional water purifier cartridge.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main body container 1a Inner wall surface 1b Gap 1c End surface 2 Bottom cover 3 Water inlet part 4 Water outlet part 5 Eye plate 6 Hollow fiber membrane module 6a Holding container 7 Granular filter material 8 Water collecting pipe 8a Water collecting pipe root part 8b Water collecting pipe end part 9 External spacer 9a, 9b Ring portion 9c, 9d Groove 9e Flange portion 9f Sheet holding portion 9g External spacer inlet portion 10 Inner layer flow 11 Outer layer flow 12 Non-woven fabric 13 Molded filter medium 14 Sheet 22 Non-woven fabric

Claims (6)

In a water purifier cartridge comprising a granular filter medium in the main body container,
A sheet that allows the fluid to pass but not the filter medium is disposed, and a gap that allows the fluid to pass therethrough and does not have the filter medium is formed between the sheet and the inner wall surface of the main body container. Has been
The filter medium is held inside a substantially cylindrical outer spacer having an opening on the outer peripheral surface, and the sheet is disposed in the opening of the outer spacer,
The outer spacer, the fluid on the end face side of that has outer spacer inlet for flowing is formed into the interior of the outer spacers, and the fluid that has passed through to the external spacer inlet port, said in the outer spacer A water purifier cartridge disposed in the main body container so as to be divided into an inner laminar flow flowing through the filter medium and an outer laminar flow flowing through the filter medium in the outer spacer after passing through the gap .   The water purifier cartridge according to claim 1, wherein the sheet is one of a mesh, a fibrous sheet, a nonwoven fabric, and felt.   The cartridge for water purifiers of Claim 1 or 2 which has the inflow means to which the fluid which has passed the said filter medium flows in into the hollow fiber membrane module accommodated in the said main body container.   The water purifier cartridge according to any one of claims 1 to 3, wherein the sheet and the external spacer are integrally formed.   The cartridge for water purifiers as described in any one of Claim 1 thru | or 4 which further provided the shaping | molding filter material in the upstream of the said external spacer.   The water purifier using the cartridge for water purifiers as described in any one of Claims 1 thru | or 5.

Images