JP3302738B2 - Water purifier - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifier used to obtain raw water by filtering raw water through a ceramic membrane filter.

[0002]

2. Description of the Related Art In recent years, it has been strongly pointed out that tap water has become bad. The causes include chlorine, rust, odor, bacteria, and the like.
Furthermore, recently, it has been pointed out that trihalomethane, which is a carcinogen, exists in tap water. Under these circumstances, household water purifiers that remove harmful substances for the human body are attracting attention. Currently, many water purifiers use a combination of activated carbon and a hollow fiber membrane filter, and remove rust and bacteria that cannot be completely removed by activated carbon by the microfiltration action of the hollow fiber membrane filter. .
One example is disclosed in JP-A-2-198684.

[0003]

However, the water purifier using the above-described hollow fiber membrane filter has the following problems. That is, since the hollow fiber membrane also becomes clogged with time, it is necessary to periodically remove the clogging in order to maintain the filter function. In order to remove the clogging, it is conceivable to carry out a chemical cleaning or to remove the organic matter causing the clogging by incineration. However, since the hollow fiber membrane is an organic membrane made of plastic and has poor chemical resistance and heat resistance, there is a problem that such a method cannot be adopted at all.

[0004] Therefore, it is conceivable to pass the washing water, but in this case, a pressure higher than that during the filtration is applied. When such a high pressure is applied to the hollow fiber membrane which is an organic membrane, pores of the membrane are widened, resulting in impairing the filter function. This point is the same even when a method of washing by applying a reverse pressure to the filter is adopted. After all, although the hollow fiber membrane filter has a high purification function, it cannot be reused if clogged, and must be discarded, which raises the cost of maintaining the water purifier. Was. In particular, in consideration of use in ordinary households, the water purifier including the hollow fiber membrane filter has an unsuitable problem due to high maintenance costs.

An object of the present invention is to solve the above-mentioned problems,
It is intended to provide a water purifier that can filter general bacteria and rust, etc., can reuse the filter portion repeatedly, and can make the mass of water molecules smaller and more uniform. is there.

[0006]

According to the water purifier of the present invention, a filtration layer, a filter layer, and a ceramic membrane filter are provided inside an outer case having a raw water inlet and a purified water outlet.
A water purifier configured so that raw water supplied from a raw water inlet passes through a filtration layer, a filter layer, and a ceramic membrane filter in that order and is purified, and water is taken in as purified water from a purified water outlet. (1) Inner diameter of an outer case A ceramic filter case with a smaller outer diameter is fixed by screwing the filter case and the filter case lid, and a ceramic membrane filter with a filter seal at the upper and lower ends is fixed inside the ceramic filter case. (2) A nylon net filter that can be inserted between the outer case and the ceramic filter case is inserted into and fixed to the outer periphery of the filter case lid. A filter that can be inserted between the filter case The filter layer provided to sandwich the coater presser plates and fixed with screws in the quick thread on the outer periphery of the filter case, a filter layer fixed structure,
(3) a filter layer fixing structure in which a filter layer containing at least activated carbon is filled and fixed between the outer case and the ceramic filter case and between the nylon net filter and the filter holding plate. And a structure that facilitates disassembly / assembly of each component during regeneration of the ceramic membrane filter.

[0007] In the present invention, the "filter layer containing at least activated carbon" preferably includes a filter layer made of only activated carbon, and is preferably composed of coconut shell charcoal and granular carbon alone or both. It also includes a filtration layer composed of a mixture with an eluted substance. . As the mineral eluting substance, coral sand is preferable. further,
In the present invention, the "filter layer that integrally holds the filtration layer" is a filter paper having a function of removing a relatively large dust and the like before filtering by the ceramic membrane filter, while integrating the cylindrical lump-shaped filtration layer. Refers to a filter such as a nonwoven fabric. Preferably, a nonwoven fabric or a polyethylene foam alone or in combination is used.

[0008]

In the above construction, since the ceramic membrane filter is used as a main filter medium for removing microscopic bacteria and rust, it is regenerated and reused by washing with an alkaline solution, washing with an acid, heat treatment, etc. can do. In addition, since a filtration layer containing at least activated carbon is provided, mold odor and chlorine can be removed. Furthermore, since a filter layer made of a nonwoven fabric or the like for integrating the filtration layer is provided, large dust can be removed before the main filtration with the ceramic membrane filter, and the life of the ceramic membrane filter, that is, backwashing, Can be made longer.

[0009]

FIG. 1 is a perspective view showing an example of an attached state of a water purifier of the present invention. In this installation example, the kitchen of a small house such as a general home is targeted. In FIG. 1, a water purifier 1
Is installed in the space below the kitchen sink S. A water stopcock M provided in a normal water flow pipe P is connected to a raw water inlet 2A of the water purifier 1 by a hose 3A, and a purified water outlet 2B of the water purifier 1 is connected to a purified water faucet W by a hose 3B. .

FIG. 2 is a perspective view showing another example of the installed state of the water purifier of the present invention. This installation example shows an example of a stationary type in which the water purifier 1 is installed in a space above the kitchen sink S, unlike the example shown in FIG. In this example, the water flow branching means 4 provided in the ordinary tap water tap Q and the raw water inlet 2A of the water purifier 1 are connected by a hose 3A via a pedestal 5, and the purified water outlet 2B of the water purifier 1 and the purified water tap W And pedestal 5
Are connected via

FIG. 3 is a diagram showing the configuration of an example of the water purifier of the present invention. In FIG. 3, 11 is an outer case made of stainless steel, 12 is a lid, 13 is a nylon net filter, 1
4 is a filter cap, 15 is a filter seal part,
16 is a filter case lid, 17 is a filter case,
Reference numeral 18 denotes a filter holding plate, 19 denotes a filter layer, 20 denotes a cover, 21 denotes an O-ring, 22 denotes an O-ring, 23 denotes a ceramic membrane filter, 24 denotes an O-ring, 25 denotes coconut shell charcoal, and 26 denotes granular charcoal. And 2A is the raw water inlet,
2B is a purified water outlet.

Among the components of the water purifier 1 described above, the ceramic filter case has a plurality of projections 17a at the bottom.
And a filter case 17 having an opening 17b, a raw water inlet 2A and a purified water outlet 2
A filter case lid 16 having a member constituting part of B and having a plurality of convex portions 16a inside is fixed by screwing via an O-ring 24. In the ceramic filter case, a ceramic membrane filter 23 provided with a filter seal portion 15 at both the upper end and the lower end, a lower portion of which is in contact with a lower portion of the filter case 17 and an upper portion thereof is sealed with a filter cap 14. Later filter case lid 16
Is fixed by contacting the plurality of convex portions 16a.

[0013] Among the components of the water purifier 1 described above, the filtration layer containing at least activated carbon is composed of coconut charcoal charcoal 25 and granular charcoal 26. Yashigara charcoal 2
The filter layer made of 5 and granular charcoal 26 is held between the outer case 11 and the above-mentioned ceramic filter case by the nylon net filter 13 whose upper part is screwed to the filter case lid 16 and the lower part is the filter holding plate 18. Is provided by holding. The coconut shell charcoal 25 is effective for removing mold odor, and it is preferable to use one having an average particle size of about 1.5 mm. Granular coal 26
Is effective for removing chlorine and has an average particle size of # 48/1.
It is preferable to use one of about 00. These amounts and particle diameters are appropriately selected depending on the state of contamination of the raw water to be treated.

Further, among the components of the water purifier 1 described above, a filter layer for integrally holding the filtration layer is a filter layer 19 provided between the nylon net filter 13 and a pair of filter holding plates 18. It is composed of The nylon net filter 13 is screwed and fixed to the filter case lid 16 as described above, and the pair of filter holding plates 18 are similarly screwed and fixed to the filter case 17. In this example, the filter layer 19 includes a nonwoven fabric layer woven of polyethylene fibers, a polyethylene foam layer having an average pore diameter of 100 μm and a porosity of 88%, an average pore diameter of 50 μm, and a porosity of 88%.
% Of a polyethylene foam layer, which is preferable because filtration can be performed stepwise and the load on the filter can be reduced. This filter layer 19 can also be used as a nonwoven fabric layer alone or by changing the pore diameter of the polyethylene foam layer depending on the contamination state of the raw water.

FIG. 4 to FIG. 10 are views showing in detail each component of the water purifier of the present invention described above. Hereinafter, FIGS. 4 to 10
Will be described in more detail with reference to FIG. First, FIG. 4 is a diagram showing an example of the ceramic membrane filter 23. The ceramic membrane filter 23 includes a ceramic filter body 31 and filter seal portions 15 provided at both ends of the filter body 31.
A large number of water passage holes are provided inside the filter body 23, and each water passage hole is open at both end surfaces in the longitudinal direction of the filter body 23. The entire filter body 23 is made of a ceramic carrier having relatively large particles. On the peripheral wall of each water passage hole, a ceramic intermediate membrane having a smaller hole diameter and a ceramic pore wall having a smaller hole diameter are provided. In addition, the filter seal 15 protects both ends of the filter main body 23 and has a function of forming a gap between the outer peripheral part of the filter main body 23 and the case when the filter main body is mounted on the case. Since the filter seal portion 15 needs a certain degree of elasticity, it is preferable to use a material such as Hytrel (trade name).

FIG. 5 is a view showing an example of the filter case 17. The filter case 17 is formed of a resin such as ABS, and has a plurality of projections 17a at a lower portion and an opening 17b. The convex portion 17a is provided for opening a gap through which raw water passes through the filtration layer between the external case and the bottom surface of the filter case 17 when the external case is attached to the external case. This is for guiding the raw water that has passed through to the filter main body 31 in the filter case 17. Furthermore, the filter case 17
In the middle of the outer peripheral portion, projections 35a and 35b for fixing the pair of filter holding plates 18 are provided, and 35b is arranged diagonally to form a quick screw. A trapezoidal screw 36 for fixing the screw 16 is provided, and a step 37 for mounting the O-ring 14 is further provided.

FIG. 6 is a view showing an example of the filter case lid 16, FIG. 6 (a) is a plan view thereof, FIG. 6 (b) is a front view thereof, and FIG. 6 (c) is a bottom view thereof. Each is shown. The filter case lid 16 is formed of a resin such as ABS, and has a trapezoidal screw 41 that meshes with the trapezoidal screw 36 of the filter case 17 on the lower inner peripheral portion. Also,
The outer periphery is provided with four projections 42 for forming a space for providing a filtration layer between the outer case and the outer case when housed in the outer case, and the nylon net filter 13 is provided on the upper periphery. A quick screw 43 for screwing is provided. Further, as shown in FIG. 6 (c), a convex portion 16a
To form a gap through which purified water passes between the outside of the filter body 31 and the filter case lid 16 when the filter body 31 is mounted.

The upper surface of the filter case lid 16 is provided with a four-part divided cylindrical convex part 44 constituting a part of the raw water inlet 2A and a hole part constituting a part of the purified water outlet 2B. 45 are provided. The projections 44 allow the raw water supplied to the water purifier 1 to pass through the surface and the outer surface of the filter case lid 16.
Is for guiding purified water finally obtained in the filter case lid 16 to the outside of the water purifier 1. The hole 45
Is provided with a groove 46 for setting the O-ring 22. FIG. 7 is a diagram illustrating an example of the filter cap 14. Filter cap 14 is ABS
It is used to seal the upper end of the ceramic membrane filter 23 by covering the filter seal portion 15 on the upper side of the ceramic membrane filter 23.

FIG. 8 is a view showing an example of the nylon net filter 13, and FIG.
(B) is a cross-sectional view along the line aa. The nylon net filter 13 is made of an elastic material such as Hytrel (trade name). A quick screw 51 that meshes with the quick screw 43 of the filter case lid 16 is provided on the inner peripheral surface of a U-shaped ring-shaped member. Are provided.

FIG. 9 is a view showing an example of the filter holding plate 18, FIG. 9 (a) is a plan view thereof, and FIG. 9 (b) is a side view showing a partial cross section. Filter holding plate 1
Numeral 8 is made of resin such as ABS, and has a plurality of holes 55 through which raw water passes. The lower filter holding plate 18 of the pair of filter holding plates 18 is provided with a quick screw 56 that meshes with the projection 35 b of the filter case 17. At the time of mounting, after setting the upper filter holding plate 18 and the three filter layers on the projection 35a, the lower filter holding plate 18 is fixed to the projection 35b of the filter case 17 by screwing. I have.

FIG. 10 is a view showing an example of the lid 12, FIG. 10 (a) is a plan view thereof, and FIG. 10 (b) is a sectional view thereof. The cover 12 is provided with holes 61 and 62 at positions corresponding to the protrusions 44 and the holes 45 of the filter case cover 16, and the raw water inlet 2 </ b> A is configured by inserting the protrusions 44 into the holes 61. At the same time, the hole 45 is inserted into the hole 62 to form the purified water outlet 2B. Also, an O-ring 2 is provided on the side of the lid 12.
A groove 63 for setting 1 is provided.

In the water purifier 1 of the present invention having the above-described structure, the raw water supplied from the raw water inlet 2A passes through the surface of the filter case lid 16 and passes through the nylon net filter 13 as indicated by the arrow in FIG. Then, it is supplied to a filtration layer composed of coconut shell charcoal 25 and granular charcoal 26. Raw water subjected to the first filtration in the filtration layer further passes through the filter layer,
It is supplied from the bottom of the filter case 17 to the inside of the ceramic membrane filter 23. Ceramic membrane filter 23
The purified water obtained by further filtration passes between the ceramic filter case and the outer peripheral portion of the ceramic membrane filter 23 and flows out from the purified water outlet 2B. By the above operation, in the water purifier 1 of the present invention, the raw water can be purified.

[0023]

As is apparent from the above description, according to the present invention, since a ceramic membrane filter is used as a main filter medium for removing microscopic bacteria and rust, washing with an alkaline solution, It can be regenerated and reused by washing with an acid, heat treatment or the like. In addition, since a filtration layer containing at least activated carbon is provided, mold odor and chlorine can be removed. Furthermore, since a filter layer made of a nonwoven fabric or the like for integrating the filtration layer is provided, large dust can be removed before the main filtration with the ceramic membrane filter, and the life of the ceramic membrane filter, that is, backwashing, Can be made longer.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an attached state of a water purifier of the present invention.

FIG. 2 is a perspective view showing another example of an attached state of the water purifier of the present invention.

FIG. 3 is a diagram illustrating a configuration of an example of a water purifier according to the present invention.

FIG. 4 is a diagram for explaining a configuration of an example of a ceramic membrane filter of the water purifier of the present invention.

FIG. 5 is a diagram for explaining a configuration of an example of a filter case of the water purifier of the present invention.

FIG. 6 is a diagram for explaining a configuration of an example of a filter case lid of the water purifier of the present invention.

FIG. 7 is a diagram illustrating a configuration of an example of a filter cap of the water purifier of the present invention.

FIG. 8 is a diagram for explaining a configuration of an example of a nylon net filter of the water purifier of the present invention.

FIG. 9 is a diagram for explaining a configuration of an example of a filter press plate of the water purifier of the present invention.

FIG. 10 is a view for explaining the prosperity of an example of the lid of the water purifier of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 water purifier 2 outer case 2A raw water inlet 2B purified water outlet 16 filter case lid 17 filter case 18 filter holding plate 19 filter layer 23 ceramic membrane filter 25 coconut charcoal 26 granular charcoal

──────────────────────────────────────────────────の Continuation of the front page (51) Int.Cl. ⁷ identification code FI C02F 1/28 C02F 1/28 R (58) Investigated field (Int.Cl. ⁷ , DB name) C02F 1/44 B01D 39 / 16 B01D 39/20 B01D 61/18

Claims (3)

(57) [Claims] A filter layer, a filter layer, and a ceramic membrane are provided inside an outer case having a raw water inlet and a purified water outlet.
(1) a water purifier provided with a filter, wherein raw water supplied from a raw water inlet is sequentially purified through a filtration layer, a filter layer, and a ceramic membrane filter, and is taken in as purified water from a purified water outlet; Ceramic with outer diameter smaller than inner diameter of outer case
Filter case, filter case and filter
-Fix the case lid with screws and
Inside the Mic Filter Case, top and bottom
Filter with ceramic filter seal
And (2) between the outer case and the ceramic filter case.
Nylon net filter that can be inserted into
Insert it into the outer periphery of the case lid and fix it.
Insertable between the outer case and the filter case
Filter sandwiched between shaped filter holding plates
The layer is screwed to the outer periphery of the filter case with quick screws.
During tanning and fixed, and a filter layer fixed structure, and (3) an outer case and a ceramic filter case
And a nylon net filter and filter holder
Fill a filter layer containing at least activated carbon between the plate
And a filter layer fixing structure, which is fixed by fixing each component during regeneration of the ceramic membrane filter.
Water purifier characterized by have a readily structural decomposition / assembly of the. 2. An external cable is provided on the outer periphery of the filter case lid.
Provide a filtration layer between the case and the outer case when stored inside
A plurality of projections to form a space for
In addition, multiple projections are provided at the bottom of the filter case,
Insert the ceramic filter case into the case
Between the outer case and the ceramic filter case.
Create a space where a filtration layer is provided and a space through which raw water passes
The water purifier according to claim 1. 3. A filter provided between filter holding plates.
Luther layer, at least nonwoven fabric and polyethylene foam
3. The water purifier according to claim 1 , wherein the filtration layer comprises at least one of coconut shell charcoal and granular charcoal. 4.