JP5029961B2 - Water purifier - Google Patents

Description

  The present invention relates to a water purification element and a water purifier using the same.

  As a simple water purifier used for home use or small-scale business use, tap water is supplied from a water supply port, and water purifier elements such as those that discharge purified water from a drain port through activated carbon or ceramic are used. However, when the water purification element is provided in the axial direction, the dimensions of the container become longer, so in general, the water purification element formed in a cylindrical shape is provided in the vertical direction, and water is passed from the outer peripheral surface in the radial direction. The water is drained from the inner hole (for example, Patent Document 1). Such an example is shown in FIG.

In FIG. 4, 1 is a base, 2 is an element support frame provided in the center of the base 1, 3 is a drain hole provided in the center of the element support frame, and 4 is open to one side of the base 1 in communication with the drain hole 3. Drainage passage, 5 is a drainage port, 6 is a water supply port opened on the other side of the base 1, 7 is a water purification element, 8 is an inner hole of the water purification element, 9 is a cover, 10 is an element holding provided on the upper surface of the cover A frame, 11 is a packing, and 12 is a fastening screw. The arrows indicate the flow of water. When the water purification element 7 is placed on the element support frame 2 of the base 1 and held by the element holding frame 10 of the cover 9, and tap water is fed from the water supply port 6 to the outer periphery of the water purification element 7, the water purification element 7 is moved in the radial direction. The purified water flows out into the inner hole 8 and is discharged from the drain hole 3 to the drain port 5 through the drain passage 4.
JP-A-5-104077 (page 2-3, FIG. 1)

However, in such a conventional water purifier, most of the water supplied from below the water purification element 7 flows into the inner hole 8 through the lower part of the water purification element 7 on the side of the drainage hole 3 with a small pipe resistance, The amount of water passing through the upper part where the pipe resistance increases away from the drain hole is reduced. For this reason, clogging of the lower part of the water purification element 7 is early, and even if the water purification ability of the upper part is present, replacement of the water purification element is necessary, and there is a disadvantage that the life is short. In addition, when the water supply port 6 is provided in the upper part or when the drainage port 5 is provided in the upper part together with the water supply port, most of the water similarly passes to the drainage hole side of the water purification element. In addition, the portion A around the element support frame 2 does not retain water due to the flow of water supply, but the portion A around the element holding frame 10 provided on the upper surface of the cover 9 in order to support the upper portion of the water purification element 7. The water that enters this part contacts the element support frame 10 and stays without being passed through the water purification element 7, or bubbles are accumulated in the water to create a space. It is the cause.
In view of the above points, an object of the present invention is to provide a water purifier having a function of enhancing sterilization properties by stably eluting certain silver for a long period of time.

In order to solve the above-described problem, according to one aspect of the present invention, a water purification element provided in a water purifier having a water inlet and a water outlet is provided, and the water purification element is stratified in a water flow direction by a plurality of elements. And the element constituting at least the most downstream layer among the plurality of elements is constituted by a granular material having a base material, a silver layer and a silver compound layer covering the base material, and The water purifier which forms the outermost layer of the said granular material is applied to the silver compound layer.
In addition, one or both of silver sulfide and silver oxide may be applied to the silver compound.
The substrate may be ceramic.
The ceramic may be alumina.
The ceramic may be silica-based .
Also, the substrate may be applied activated carbon.

  In the present invention, since silver and a silver compound are attached to the water purification element in the most downstream layer, when the purified water passes through the bottom layer, the silver is eluted and sterilized to the stagnant water and faucet inside the downstream pipe of the water purifier. There is an effect that performance can be maintained.

  A cylindrical water purification element is provided in the vertical direction in a water purification container composed of a base and a cover, and the water supplied into the container from the water supply port is passed through in the radial direction from the outer periphery of the water purification element. In the water purifier that flows out from the inner hole to the drain outlet provided below the container, the inner cylinder with the lower end communicating with the drain hole in the inner hole of the cylindrical water purification element using granular activated carbon or ceramic A water passage gap corresponding to the amount of discharged water is formed between the outer peripheral surface of the inner cylinder and the inner side surface of the water purification element, and the inner side of the inner cylinder and the water passage gap are formed at the upper end of the inner cylinder. The water purified through the water purification element flows upward through the water flow gap, enters the inside of the inner cylinder through the water flow hole, and is discharged. Also, at least the end of the water purification element that is far from the water supply port and has less water flow eliminates the frame separating the outside of the water purification element and the water so that water does not stay in the container. For this reason, the end of the water purification element is fitted and held in a concave hole provided on the inner side surface of the container so that all the water contacts the water passage portion of the water purification element and passes through the inner hole. In addition, the lower end of the water passage gap is formed on an inclined surface that is inclined toward the inner surface of the water purification element, so that the flow of water is smooth and water does not stay at the lower end portion of the water passage gap.

  The present invention will be described below with reference to embodiments shown in the drawings. In FIG. 1, 1 is a base, 2 is an element support frame provided in the center of the base 1, 3 is a drain hole provided in the center of the element support frame, and 4 is open to one side of the base 1 in communication with the drain hole 3. A drainage passage, 5 is a drainage port, 6 is a water supply port opened on the other side of the base 1, 7 is a water purification element, and a granular activated carbon is filled between the outer plate and the inner plate with a large number of holes through a wire mesh. It is formed in a cylindrical shape. As the water purification element, a conventionally used element such as one made of ceramic or one filled with a fibrous filter material can be used.

  8 is an inner hole of the water purification element, 9 is a cover, 11 is a packing, and 12 is a fastening screw. Reference numeral 20 denotes an inner cylinder provided in the inner hole 8 of the water purification element 7, whose lower end communicates with the drainage hole 3, which is communicated with the drainage hole 3 of the base 1 so that it can be attached or detached. Formed. 21 is a water passage hole provided at the upper end of the inner cylinder 20, 22 is a water passage gap formed between the outer peripheral surface of the inner cylinder 20 and the inner surface of the water purification element 7, and 23 is provided on the inner upper surface of the cover 9. The upper end of the water purification element 7 is fitted in the recessed hole. Reference numeral 24 is an inclined surface provided at the lower end of the water passage gap 22 and directed toward the water purification element 7. The inclined surface 24 may be curved or linear as shown in the figure.

  The water purification element 7 is inserted outside the inner cylinder 20 provided on the element support frame 2 of the base 1, the lower end portion is supported by the element support portion 2, the cover 9 is covered, and the upper end of the water purification element 7 is recessed. The base 1 and the cover 9 are fastened with a fastening screw 12 via a packing 11. As shown by the arrow, the water fed from the water supply port 6 is purified by passing water radially from the outer periphery of the water purification element 7 to the inner hole 8 and discharged into the water passage gap 22 in the inner hole 8. The water flows upward through the water passage gap 22, enters the inner cylinder 20 through the water passage hole 21, and is discharged from the drain hole 3 to the drain outlet 5 through the drain passage 4. Therefore, the water passing through the lower part of the water purification element 7 flows upward through the water passage gap 22, so that the pipe resistance increases, and the pipe resistance in the water passage gap decreases toward the upper part of the water purification element. Similarly to the lower part of the water purification element close to 6, the same amount of water is passed from the upper part of the water purification element far from the water supply port 6, and the water passes evenly from the entire peripheral surface of the water purification element 7. The upper end of the water purification element 7 is fitted and held in the concave hole 23 of the cover 9 and the uppermost water in the cover 9 also contacts the water purification element 7 and flows into the inner hole 8. No water stays in the water. Further, by providing the inclined surface 24 at the lower end of the water passage gap 22, the water that has passed through the lower portion of the water purification element 7 flows smoothly above the water passage gap 22, and the water stays at the lower end of the water passage gap 22. It does not occur.

  FIG. 2 shows an embodiment in which the water supply port 6 is provided in the upper part of the container. The same reference numerals are given to the same parts as in FIG. 1 is provided with a drain hole 3, a drain passage 4, and a drain port 5, and a concave hole 23 that surrounds the drain hole 3 and fits and supports the lower end of the water purification element 7 is provided. The water supply port 6 is opened at the upper end of the cover 9 so as not to form a space in the upper part of the container. Moreover, although the upper end part of the water purifying element 7 is hold | maintained with the element holding frame 10, it can provide and hold | maintain a concave hole in a cover inner upper surface like FIG.

  The water supplied from the water supply port 6 flows into the outer periphery of the water purification element 7 and is purified by passing the water purification element in the radial direction as indicated by an arrow, and rises through the water passage gap 22 to the inside through the water passage hole 21. It enters the cylinder 20 and is discharged from the drain hole 3 to the drain port 5. For this reason, the water that has fallen downward in the container concentrates and flows through the lower part of the water purification element 7 and does not flow into the drain port 3 as it is. Water is restricted and water is purified from the entire surface of the water purification element 7 toward the inner hole 8. In addition, since the water supply port 6 is provided in the upper end in the container, the upper space is eliminated, and the lower end of the water purification element 7 is fitted in the concave hole 23 on the inner surface of the base 1, so that water stays at the lower end. In addition, the lower end of the water passage gap 22 is configured in the same manner as in the embodiment of FIG. 1 so that the purified water does not stay in the water passage gap.

In addition, in order to improve sterilization property, about the water purification element 7, it is good not to use only activated carbon or a ceramic but to use the following things.
(1) Activated carbon containing (for example, impregnated) containing silver and a silver compound (silver oxide, silver sulfide, etc.).
(2) A ceramic containing (for example, attached) silver and a silver compound (silver oxide, silver sulfide, etc.). (3) A two-layer structure comprising an activated carbon part (for example, impregnated) containing silver and a silver compound (silver oxide, silver sulfide, etc.) and a normal activated carbon part (the normal activated carbon part on the upstream side) It is desirable to install.)
(4) Activated carbon portion containing (for example, attached) silver and a silver compound (silver oxide, silver sulfide, etc.) and silver and a silver compound (silver oxide, silver sulfide, etc.) (eg, attached) ) Ceramic part having a two-layer structure (in the case of a two-layer structure, it is preferable that silver and a silver compound are attached to both layers, but it may be attached only to the ceramic part. It is preferable to install the ceramic part on the downstream side, because if the ceramic part is installed on the upstream side, the silver that has been dissolved at a corner is adsorbed by the activated carbon part on the downstream side and the sterilization performance deteriorates.

  FIG. 3 shows an example of a preferred embodiment in which the water purification element portion has a two-layer structure. The activated carbon portion 31 is made of activated carbon 32 with silver and a silver compound attached thereto, and the ceramic portion 33 is made of silver and silver. It consists of a ceramic ball 34 to which a compound is attached, and its border and the outer frame of the water purification element are partitioned by a nonwoven fabric 35 and a wire mesh 36. Although partially omitted in the figure, the activated carbon portion 31 is filled with activated carbon 32 to which silver and a silver compound are attached, and the ceramic portion 33 is filled with ceramic balls 34 to which silver and a silver compound are attached. The activated carbon 32 and the ceramic ball 34 have a structure in which silver 37 is coated on the surface and silver sulfide 38 is coated on the outside as shown in the enlarged portion. Silver oxide is also present but in small quantities.

The inventor conducted experiments on these various modifications. The base material of the ceramic ball 34 may be generally used such as alumina or silica, but the diameter was about 1 mm, and the experiment was performed using activated carbon having a diameter of about 0.1 mm. Also, change the type, composition, composition, etc. of silver and silver compounds, and also in a state close to the general household use record such as the state of running water (alternate switching of running water / storage water, etc.), water quality (PH etc.), temperature, etc. I am experimenting.
As an example, a case where 1% by weight of silver and a silver compound is impregnated with alumina-based ceramic 600CC and activated carbon 4200CC, and the proportion of silver sulfide in the silver and silver compound is 5 to 90% by weight, and silver oxide is 0%. When the silver elution capacity was confirmed when it was set to ˜50% by weight (the total weight of the attached silver and silver compound was 10 g), the silver concentration in water was 10 ppb at a total water flow of 120 tons (one year in a normal household). This has been maintained for a year. Bactericidal action is produced by elution of silver, and it is said that about 10 to 100 ppb is desirable. The weight of silver and the silver compound may be contained in any form as long as a necessary elution amount can be secured. There was an excellent effect when the surface of the substrate had a silver layer and the outermost surface contained a large amount of silver sulfide (including a small amount of silver oxide). In addition, when only silver was attached, elution was completed early, and silver could not be eluted stably over a long period of time.

Side sectional view showing an embodiment of the present invention Side sectional view showing another embodiment Side sectional view showing another embodiment Side sectional view showing a conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base 2 Element support frame 3 Drain hole 5 Drain port 6 Water supply port 7 Water purifying element 8 Inner hole 9 Cover 10 Element holding frame 20 Inner cylinder 21 Water passage hole 22 Water passage gap 23 Recessed hole 24 Inclined surface 31 Activated carbon part 32 Silver and Activated carbon 33 impregnated with silver compound Ceramic part 34 Ceramic ball impregnated with silver and silver compound 35 Non-woven fabric 36 Wire mesh 37 Silver 38 Silver sulfide

Claims (6)

It has a water purification element installed inside a water purifier having a water inlet and a water outlet,
The water purification element is configured in layers in the direction of water flow by a plurality of elements,
Among the plurality of elements, the element constituting at least the most downstream layer is composed of a base material, and a granular material having a silver layer and a silver compound layer covering the base material,
And the layer of the said silver compound is a water purifier which forms the outermost layer of the said granular material. The water purifier according to claim 1, wherein the silver compound is one or both of silver sulfide and silver oxide. The water purifier according to claim 1 or 2, wherein the base material is ceramic. The water purifier according to claim 3, wherein the ceramic is alumina-based. The water purifier according to claim 3, wherein the ceramic is silica-based. The water purifier according to claim 1, wherein the base material is activated carbon.

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