JP2002331286A - Water cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a faucet mounting type water cleaner capable of ensuring a sufficient flow rate of clean water even in such a state that the pressure of water is low and hard to cause clogging even under a high turbidity condition. SOLUTION: The water cleaner is constituted so that filter media are arranged to the gaps between a cartridge and filter cloths in a filtering part and layers are formed by the adhesion of the filter media to the filter cloths. This water cleaner is reduced in pressure loss and far hard to generate clogging as compared with a water cleaner using only hollow fiber membranes and enables the removal of turbidity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a faucet direct connection type water purifier having a filter medium for removing turbidity.

[0002]

2. Description of the Related Art Conventionally, as a turbidity removing filter material of a tap water purifier, there is known a so-called carbon fiber block formed by sintering a hollow fiber membrane having a large number of fine holes on a wall surface or activated carbon. However, in the case of the hollow fiber membrane, when raw water having high turbidity is passed, clogging is easily caused, and a sufficient flow rate of purified water cannot be secured, so that use of the hollow fiber membrane becomes difficult to use. Further, when a carbon block is used as a filter material, the pressure loss is large, so if the supply pressure of raw water is not at least about 50 N / cm ² ,
It is still difficult to secure a sufficient flow rate of purified water.
Therefore, when these water purifiers are used in an area where water pollution is severe, there has been a problem that the water purifier cannot be used immediately.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has been developed under the low raw water pressure of about 10 N / cm ² .
An object of the present invention is to provide a water purifier that can ensure a sufficient flow rate of purified water and is less likely to be clogged even under high turbidity.

[0004]

Means for Solving the Problems The present inventors have made intensive studies to achieve the above object, and as a result, have reached the present invention described below.

That is, the water purifier of the present invention is a water purifier including a base portion and a filtration portion. (1) The base portion is connected to a water tap and externally supplies water flowing from the water tap. A raw water discharge port for discharging water to the filtration unit; a raw water supply port for supplying water flowing from the water tap to the filtration unit; a flow path for water flowing from the water tap to the raw water discharge port; (2) The filtration unit is connected to a raw water supply port of the base unit, and filters water flowing from the raw water supply port. A filter having a powder filter medium layer and a downstream filter cloth downstream of the powder filter medium layer and allowing water passing through the powder filter medium layer to pass therethrough, and a filtered water discharge port for discharging water filtered by the filter body. It is a thing.

[0006] Further, the filter body includes an upstream filter cloth upstream of the powder filter medium layer and for passing water received from the raw water supply port.

[0007] The upstream filter cloth and the downstream filter cloth may integrally form a bag, and the powder filter medium layer may be held inside the bag.

Further, the filtration section is provided downstream of the downstream filter cloth, and has a hollow portion which communicates with the filtered water discharge port and most of the periphery is surrounded by the downstream filter cloth.

[0009] The hollow portion may include a layer in which hollow fiber membranes for filtering water passing through the downstream filter cloth are bundled.

[0010] The filtering section includes a raw water inlet for receiving water from the base section and the filtered water discharge port, and includes a filtering container for accommodating the filter body.
The container includes a container body having an opening through which the filter body can be taken in and out, and a lid to which the opening can be screwed.

[0011] Further, the powdered filter medium layer may include powdered activated carbon,
It contains at least one of diatomaceous earth and silver members.

By adopting the above-described structure, the filter medium adheres to the filter cloth to form a layer, thereby enabling removal of a relatively large level of turbidity, and has a much lower pressure loss than the carbon block. In addition, clogging is much less likely to occur as compared with hollow fiber membranes. Also,
By removing relatively large stains with a filter medium and a filter cloth, and further removing turbidity at a fine bacterial level with a hollow fiber membrane, clogging is less likely to occur than a water purifier using only a hollow fiber membrane, and a fine It is characterized in that turbidity can be removed.

In the present invention, "passing" water through a member means that all or a part of the inflowing water passes through the member.

[0014] Also, that a member "filters" water,
This means that the member captures a part of the inflowing water component and allows the remaining water component to pass through.

[0015] The term "most of the periphery" of a member or region means a portion occupying more than half of the surface area of the surface of the member or region.

Further, "surrounding" a certain area means enclosing the area. However, a support or the like through which water can pass may exist between the region and the region.

[0017] The term "silver member" refers to a silver layer contained in the filter medium constituting the filter medium layer or a filter medium layer (particles of powdered activated carbon or diatomaceous earth) coated with a silver film. Refers to a member containing metallic silver that can come into contact with water passing through.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 to FIG. 4 are longitudinal sectional views of a filter section of a faucet direct connection type water purifier showing one embodiment of the present invention. FIG. 5 is a partially transparent front view of a water purifier showing one embodiment of the present invention, and FIG.
Is a top view of the water purifier shown in FIG. 5, and FIG. 7 is a right side view of the water purifier shown in FIG.

First, as shown in FIGS. 5 to 7, the water purifier 1 includes a base portion 2 having a switching valve built therein and a filtering portion 3 directly connected to the base portion 2 and containing a filter medium. It is composed of The base portion 2 is provided with a lever 5, and is configured to interlock with a built-in flow path switching valve (not shown) having a known structure. By operating the lever 5 in the direction of A in FIG. 7 to operate the flow path switching valve, the raw water flowing from the water tap 4 is discharged from the raw water discharge port 6 as it is as shower water (raw water shower). ), Discharge as straight water (raw water straight) or supply from raw water supply port 7 to filtration unit 3 and select a flow path for supplying raw water flowing from the faucet. It can be switched to. Raw water supplied to the filtration unit 3 is granular, such as activated carbon,
It is filtered by a filter medium such as a powdery adsorbent or diatomaceous earth, and is discharged from a water purification port as purified water.

Next, a first embodiment of the filtering section 3 will be described with reference to FIG.

The filtration unit 3 is provided with a raw water receiving port 9 for receiving raw water from a raw water supply port 7 of the base unit 2 at a side portion of a filtration container 8 composed of a container body 8a and a lid 8b. Are provided with a plurality of filtered water discharge ports 10 (shower holes) for filtering raw water and discharging the purified water as purified water.

The lower end of the cylindrical body 11 is fitted upright through an O-ring 12 to a cylindrical projection 8 c formed on the inner bottom surface of the filtration container 8. The tubular body 11 has a check valve 13 and a hollow portion 14 for receiving the purified water therein.
And a perforated pipe 15 for supplying purified water in the cavity 14 to the filtered water discharge port 10 (shower hole). Further, between the downstream filter cloth 16 in contact with the hollow portion 14 and the cylindrical body 11 and the downstream filter cloth 16, powdered activated carbon, silvered activated carbon, diatomaceous earth, granular activated carbon, ion exchange resin particles, zeolite particles, chelate resin A powder filter medium layer 17 in which filter media such as particles are arranged in layers is provided. In this powder filter medium layer 17,
It contains a filter medium which is a fine particle powder smaller than ordinary granular activated carbon, and is configured to be able to filter relatively large particles such as red rust.

The downstream filter cloth 16 has a porous structure having sponge-like open cells, allows water filtered through the powder filter medium layer 17 to pass through, and maintains the form as shown in the figure. , And has a certain thickness. Further, it is preferable that the downstream filter cloth 16 is formed by folding a nonwoven fabric of polyester or polypropylene into a pleated shape, because the surface area usable for filtration increases. In this embodiment, the powder filter medium layer 17 and the downstream filter cloth 16 are combined to form a filter.

The container 8a has an opening so that the cylindrical body 11 can be easily replaced, and is screwed with a lid 8b.

Here, when water is filtered using the filtration unit 3, first, raw water entering from the raw water receiving port 9 is supplied to the check valve 13.
Through the filter medium layer 17 and the downstream filter cloth 16. At this time, relatively large stains such as red rust are removed. The filtered water enters the cavity 14 and the perforated pipe 1
After passing through 5, the water is discharged from the filtered water discharge port 10.

Next, a second embodiment of the filtering section 3 will be described with reference to FIG.

The basic structure is similar to that of the first embodiment, but differs in that a bundle 18 of hollow fiber membranes is inserted inside the hollow portion 14. In order to prevent unfiltered water from passing through the inside of the hollow fiber, the hollow fiber membrane may be installed by bending the yarn so as to bundle the cross section and facing the discharge hole of the water. Preferably, the bundle bundles a number of yarns to increase the filtration area.

Here, in the case of filtering water using the filtration unit 3, first, as in the first embodiment, relatively large dirt is removed with a filter medium and a filter cloth. Further, thereafter, minute turbidity at the microbial level is removed using a hollow fiber membrane, and the water is discharged from a shower hole as purified water. By separating the function of removing the large level and the small level of turbidity in this manner, clogging hardly occurs and water can be purified with high precision, which is a very preferable configuration.

When using such a water purifier for a long time,
Dirt is clogged in the filter, and the pressure loss of water increases, so that a sufficient amount of water cannot be obtained. Therefore, after long-term use, it is preferable to remove the lid 8b from the container body 8a so that the filter body inside can be removed and replaced together with the tubular body 11. It is possible to use it economically by replacing only the filter. Further, by removing the large dirt removed by the filter and reusing the filter, it is possible to use the filter more economically.

FIGS. 3 and 4 show the third and fourth embodiments, respectively, which improve the first and second embodiments and add an upstream filter cloth so that the filter body can be washed or replaced.
1 is an embodiment of the present invention. The downstream filter cloth 16 and the upper channel cloth 19 are configured as a bag body that sandwiches the powder filter medium layer 17 inside the tubular body 11 and is attached to the hollow portion. The upper part of the cylindrical body is configured so that the lid is screwed and removed like the filter container. By adopting such a configuration, it is possible to remove a large dirt clogged inside the filter body, and at the same time, prevent the filter medium from flowing out by sandwiching the powdery filter medium 17 between the upstream and downstream filter cloths 16 and 19. Can be. Therefore, even if the filter is soiled, it can be reused repeatedly by washing the filter itself, which is a preferred embodiment. It should be noted that the upstream filter medium may itself have a function of filtering water.

The provision of the cavity in the first to fourth embodiments is preferable because the effect of reducing the flow path resistance by increasing the surface area of the downstream filter cloth is preferred. Also, if the hollow part is provided at the most downstream, after the supply of water from the faucet stops,
Since the water in the hollow portion is quickly discharged from the filtered water discharge port, it is difficult for the water to stay. Although the perforated pipe 15 is provided in the embodiment of FIG. 1, it may be removed. If a filter material that removes chlorine components such as activated carbon is used as filter media, there is a possibility that a large amount of germs will grow if filtered water stays on the downstream side of the downstream filter cloth. preferable. In the case where the hollow fiber filtration membrane is provided in the hollow portion, the hollow fiber filtration membrane has a germ elimination function,
The need to drain water quickly is low. In addition, downstream filter cloth 1
No. 6, as shown in the first embodiment, is preferable because the surface area can be increased when the surface is pleated.

It is preferable to use powdered activated carbon, diatomaceous earth or the like as the powdered filter medium layer. As the size of the particles in the powder portion, for example, a large amount of fine particles having an average particle size of about 20 to 500 μm may be contained. Including a silver member therein has an effect of suppressing the propagation of various bacteria remaining in the water when the water purifier is not used, which is preferable.

The above embodiment is a so-called faucet direct connection type water purifier in which the base portion and the filtration portion are directly connected.
It is preferable to use a faucet direct connection type because the flow path of water as a whole can be shortened, pressure loss can be reduced, and a compact form can be achieved. However, a stationary type in which the base portion and the filtration portion are connected via a hose or the like is preferable. It may be.

[0035]

As described above, according to the water purifier of the present invention, a relatively large turbidity of dirt can be removed by forming a layer with a powdered filter medium layer adhering to the filter cloth. This makes it possible to purify water with much less pressure loss than in the case of the hollow fiber membrane and with much less clogging than the hollow fiber membrane.

Further, a filter medium layer and a layer in which hollow fiber membranes are bundled on the downstream side of the filter cloth are provided. A relatively large stain is removed by the filter medium and the filter cloth, and then fine turbidity is further removed by the hollow fiber membrane. By doing so, clogging is less likely to occur and fine turbidity can be removed as compared with a water purifier using only a hollow fiber membrane, and high-precision filtration can be performed even in an area where water contamination is severe.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a water purifier filtration unit according to one embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a water purifier filtration unit according to one embodiment of the present invention.

FIG. 3 is a longitudinal sectional view of a water purifier filtration unit according to one embodiment of the present invention.

FIG. 4 is a longitudinal sectional view of a water purifier filtration unit according to one embodiment of the present invention.

FIG. 5 is a partially transparent front view of the water purifier according to one embodiment of the present invention.

FIG. 6 is a top view of the water purifier shown in FIG.

FIG. 7 is a right side view of the water purifier shown in FIG.

[Explanation of symbols]

1: water purifier 2: base part 3: filtration part 4: tap water tap 5: lever 6: raw water discharge port 7: raw water supply port 8: filtration container 8a: container body 8b: lid 8c: cylindrical projection 9: raw water receiving Inlet 10: Filtration water outlet 11: Cylindrical body 12: O-ring 13: Check valve 14: Cavity 15: Perforated pipe 16: Downstream filter cloth 17: Powder filter medium layer 18: Hollow fiber membrane 19: Upstream filter cloth

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/50 520 C02F 1/50 531E 531 540F 540 550C 550 560B 560 560E 560Z B01D 29/06 510A 510C

Claims (7)

[Claims] 1. A water purifier comprising a base part and a filtration part, wherein (1) the base part is connected to a water tap,
A raw water discharge port for discharging water flowing from the water tap to the outside; a raw water supply port for supplying water flowing from the water tap to the filtration unit; and a flow path of water flowing from the water tap to the raw water discharge port. It is configured to be switchable between a flow path toward an outlet and a flow path toward the raw water supply port,
And (2) the filtering unit is connected to the raw water supply port of the base unit, and filters the powder filter medium layer that filters water flowing from the raw water supply port and the powder filter medium layer downstream of the powder filter medium layer. A water purifier, comprising: a filter having a downstream filter cloth for allowing water to pass therethrough; and a filtered water discharge port for discharging water filtered by the filter. 2. The water purifier according to claim 1, wherein the filter body includes an upstream filter cloth upstream of the powdered filter medium layer and passing water flowing from the raw water supply port. 3. The water purifier according to claim 2, wherein the upstream filter cloth and the downstream filter cloth are integrally formed to form a bag body, and the powder filter medium layer is held inside the bag body. . 4. The filter section, which is located downstream of the downstream filter cloth and has a hollow portion that communicates with the filtered water discharge port and that is mostly surrounded by the downstream filter cloth. 1
A water purifier according to any one of claims 1 to 3. 5. The water purifier according to claim 4, wherein the filtering section includes a layer in which hollow fiber membranes for filtering water passing through the downstream filter cloth are bundled in the hollow section. 6. The filter section includes a raw water receiving port for receiving water from the base section and a filtered water discharge port, and includes a filter container for storing the filter body, and the filter container takes in and out the filter body. The water purifier according to any one of claims 1 to 5, comprising a container main body having a possible opening and a lid capable of screwing the opening. 7. The powdered filter medium layer contains at least one of powdered activated carbon, diatomaceous earth and silver members.
The water purifier according to claim 1.