JPS61118186A - Structure of main body of water purifier - Google Patents

Abstract

PURPOSE:To control the propagation of bacteria when a plug is closed for a long time and to obtain drinking water without any fears of bacteria immediately after the plug which is closed for a long time is opened by composing a filter layer of a silver and activated carbon layer part and a heavy metal adsorbent layer part to remove chlorine and heavy metals. CONSTITUTION:Water sterilized with chlorine is supplied from one side of a case 5, passed through a filter layer 9 in the case 5, and discharged from an outlet on the other side in the main body of a water purifier 1. The filter layer 9 is composed of silver and activated carbon layers 8A and 8C carrying about 0.05-1.0wt% silver and a heavy metal adsorbent layer 8D. Moreover, a water-retaining member 7 having water permeability and water retentivity is provided on the outer periphery of both layer parts or at the -inside, the length is almost equalized to that of the passage through both layers wherein water is passed, and the amt. of the member 7 to be provided to both layers is regulated so that the flow of water may be extremely reduced. Consequently, chlorine and heavy metals are removed, the water is sufficiently purified as drinking water, the propagation of bacteria when a plug is closed for a long time is controlled, and a fear of bacteria immediately after the plug which is closed for a long time is opened-, is eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an improved structure of a water purifier, and more particularly to an improved structure of a purification unit main body of a water purifier that purifies chlorine-sterilized water.

(Prior Art) The filtration layer of conventional water purifiers that purify tap water was often made of activated carbon alone. This water purifier uses activated carbon to completely remove residual chlorine in tap water.
When the water purifier is stopped (closed) for a long period of time, the water inside the container, which has no sterilizing effect, remains in the activated carbon filtration layer, allowing bacteria to grow in the filtration layer, and is discharged within the first few minutes of use of the water purifier. There was a problem that the water was not suitable for drinking.

To solve this problem, attempts have been made to purify tap water by using silver-loaded activated carbon in water purifiers, but the growth of bacteria in the water that comes in contact with the silver activated carbon is inhibited. However, since the water from drains does not come into contact with the silver activated carbon, it is contaminated from the air and contains bacteria, resulting in bacteria being detected in the water immediately after the tap is opened. Increasing the silver content of silver activated carbon increases the bactericidal effect, but there is a problem in that a large amount of silver is eluted into the filtered water.

In addition, groundwater and underground water from rivers are used as raw water for drinking water, but some of these raw waters contain heavy metals due to environmental pollution, and this heavy metal-contaminated raw water is treated with chlorine. Even after sterilization, there were problems that made drinking water undesirable.

(Problems to be Solved by the Invention) The present invention is an attempt to solve the above-mentioned conventional problems, and provides water that is sufficiently purified for use as drinking water by removing chlorine and heavy metals. To provide a silver activated carbon filtration type water purifier which does not cause the growth of bacteria when the tap is closed for a long time and provides drinking water free from bacteria at the initial stage of opening after the tap is closed for a long time.

(Means for Solving the Problems) Therefore, the means of the present invention for solving the above problems are as follows. That is, in the present invention, in the main body of the water purifier in which chlorine-sterilized water supplied from one side of the case passes through a filtration layer in the case and is discharged from the outlet of the other side of the case, the filtration layer contains approximately silver. 0.05-1.0
It consists of a layer of silver activated carbon carrying % by weight and a layer of a heavy metal adsorbent that adsorbs heavy metals, and a water retaining member having water permeability and water retention is provided on the outer periphery or inside of both layers. The length of the layer is approximately equal to the length of the layer in the water flow direction, and the amount of water flowing through both layers is extremely small.

The chlorine-sterilized water refers to water that has been subjected to chlorine-based sterilization treatment and made available for drinking, such as ordinary tap water, rivers, lakes, wells, underground water, and underground river water. The filtration layer is mainly made of silver activated carbon (hereinafter referred to as
It is called the main layer. ) and a heavy metal adsorbent layer (hereinafter referred to as the sub-layer), the sub-layer is formed thinner than the main layer, and both layers are stacked one above the other in the case. . d) It is preferable that the heavy metal adsorbent has a selectivity that selectively adsorbs unnecessary heavy metals. As the water retaining member, a material having water permeability and water retaining properties, such as a water permeable sponge material, is used. The water flow rate ratio between the filtration layer (main layer part and sublayer part) and the water retaining member is preferably about 4:1 to 20:1.

(Function) In this invention, water is filtered (purified) by the silver activated carbon in the main layer. The activated carbon part of the silver activated carbon acts as an adsorbent for chlorine and other odor components and pollutants, and the silver part of the silver activated carbon acts as an antibacterial agent for contact water. Then, the heavy metal components of the water are removed by the heavy metal adsorbent.

When the water is opened, chlorine has been removed from the water in the main layer and sub-layer, but contact with the silver portion prevents the growth of bacteria. The water retaining member installed in the silver activated carbon filtration layer retains water containing chlorine, so bacteria that invade the drainage port side of the filtration layer are prevented from multiplying by a trace amount of chlorine and a trace amount of silver dissolved in the water. be done.

On the other hand, when the bottle is opened, most of the water passes through the silver activated carbon filtration layer and undergoes filtration treatment, while a small portion of the water is sent to the filtration layer outlet via the water retention member and undergoes the silver activated carbon large m filtration treatment. mixed with water.゛In other words, by suppressing bacterial growth within the filtration layer using silver activated carbon, and by mixing some undechlorinated water from the water-permeable water retaining member into the filtered water, the sterilization effect near the filtration layer outlet can be improved. It is something that we try to maintain.

(Example) Next, an example of the present invention will be described with reference to the drawings.

The water purifier 1 shown in FIG. It is used by connecting to a part of the ji cock via a connecting conduit H, and includes a base 2 having a water guide hole 3, and a cylinder standing upright on the base 2 and housing a filtration layer 9 and a water retaining member 7. It consists of a shaped case 5 and a lid 11 which is elegantly attached to the case 5 and has a drain pipe 12.

3A is a connecting portion of a connecting conduit H formed at the outer end of the water guiding hole 3, and is used as a mouth portion for water guiding. Said group! An annular screwing piece 4 is formed on the upper surface of the lI2, and a lower end portion of the case 5 is screwed into the ring-shaped screwing piece 4. A water retaining member 7 is arranged annularly along the inner peripheral surface of the case 5, and is made of a water permeable and water retaining material such as a water permeable sponge material. Reference numeral 9 denotes a cylindrical column-shaped filter layer formed inside the annular water retaining member 7. That is, the filtration Ii9 is a mesh-like water passing plate 10A to 10A.
The 11th layer of silver activated carbon is placed above the lower stage through the ! ! Part 8A
1, a second layer 8B of mineralizing agent, a third layer 8G of silver activated carbon, and a fourth layer 8D of heavy metal adsorbent. In this example, it is divided into four layers of equal layer thickness. The outer periphery of the four-layered portion is covered with a water retaining member 7. Note that the water passing plates 6A and 6B at the lower end and upper end of the filtration layer 9 are
It has a size that covers the end of the water retaining member 7, and is fixed by protruding locking pieces 5A and 5B formed on the inner surface of the case 5.

The silver activated carbon used in the first layer portion 8A and the third layer portion 8C is obtained by the usual process of immersing activated carbon powder or granules in silver nitrate water (mH), washing with water and drying. The ingredients are approximately O, OS~i, o@1% (hereinafter simply referred to as %)
It is abbreviated as ) is used. If the amount of silver carried is 0.05% or more, it is about 1 bacteria, which is the standard for tap water.
If it is 0.2% or more, there will be no bacteria at all, but if there is too much silver, it is not good for drinking, so the range is about 0.05 to 1.0%.
Approximately 0% is preferable.

The mineralizing agents in Part 211 8B are limestone and marble.

A crushed product containing calcium carbonate as a main component, such as coral sand, is used. Mineralizing agents have the effect of neutralizing acidic water and elute minerals into water.

The heavy metal adsorbent in the fourth layer portion 8D has imide groups, carboxyl groups,
It has a structure that has a functional group such as an amine group, and for example, "Diaion CR-10" manufactured by Mitsubishi Chemical Industries KK.
(trade name), "Kurakylate G-15J (trade name) manufactured by Kuraray Chemical KK,""Evolus MX-84 (trade name) manufactured by Miyoshi Oils and Fats KK, etc." are used.

This heavy metal adsorbent absorbs Zn and Cu contained in raw water.

General heavy metal ions such as Cd and silver eluted from silver activated carbon are adsorbed.

The drain pipe 12 of the lid 11 is for discharging filtered water, and one end 12A' is rotatably attached to the center of the lid 11, and the other end 12B, which serves as a drainage port, is formed downward. It is something. In addition, the base 2 in this example water purifier. Case 5. Each connection part of the lid body 11 is connected in a watertight manner through a gasket (not shown).

Now, when the water purifier 1 of this example is opened, the chlorine-sterilized water that enters the container from the water introduction hole 3 of the base 12 enters the filtration layer 9 via the water passage plate 6A and passes through the upper back. Layer section 88 to 4th WJ section 8D
The water is processed into filtered water. In other words, water containing chlorine is the first
Under the action of the silver activated carbon in the 11th part 8A and the third layer part 8C, chlorine and the like are adsorbed on the activated carbon, neutralized by the action of the mineralizing agent in the second layer part 8B, and calcium is eluted, and In the fourth layer portion 8D, silver ions and shielding components originating from the raw water are adsorbed and removed to obtain filtered water.

On the other hand, a very small portion (very small i) of the water that entered the vessel through the water introduction hole 3 enters the water retaining member 7 on the outer periphery of the filtration layer 9, rises inside the water retaining member 7, and is filtered at the upper part of the filtration layer 9. It is mixed with water and discharged as purified water (filtered water) through the drain pipe 12 and the mouth 12B (see the arrow in FIG. 4). Since the amount of water passing through the water retaining member 7 is extremely small, even if it is mixed with purified water, it has no effect on the water quality. The quantitative ratio between the filtration layer 9 and the water retaining member 7 is such that the water retaining member 7 is extremely small relative to the filtration layer 9 in a cross section perpendicular to the water flow direction, and the length of the filtration layer 9 in the water flow direction is are made approximately equal length. In this example, the ratio of flowing water a between the filter 111i9 and the water retaining member 7 is about 9=1.

When the water purifier 1 is stopped (opened), the water that remains in the container is not only affected by the antibacterial action of the silver component of the silver activated carbon in the filtration layer 9, but also by the differential chlorine content of the water retained in the water retaining member 7. This action prevents the proliferation of microorganisms in the water inside the water purifier 1 while the water purifier 1 is stopped, especially in the water above the filtration layer 9 leading to the discharge pipe 12.

Next, an experimental example using the water purifier 1 of this example will be shown.

Experimental example A sponge material water retaining member made of open cells with a thickness of 10 rin was formed on the outer periphery of a filtration layer with an inner diameter of 1100 a and a length of 250 g, and the inside was partitioned into four equal layers in the vertical direction via water passing plates. Fill the upper stage with silver activated carbon, mineralizing agent, and silver activated carbon 1 heavy metal adsorbent, and pour 300J of tap water in an upward flow.
Water was passed at /h.

Comparison Control A: The same three-layer filter layer as in the above experimental example in which the heavy metal adsorbent was not filled.

For the above two points, tap water containing 0.5 ppm of residual chlorine
After continuous water flow for 10 hours at 00 J/h, water flow was stopped for 24 hours, and the number of bacteria in the filtered water after the b1 plug was examined.

The results were as shown in Table 1.

From Table 1, it can be seen that in this example, AQ was adsorbed and removed by the heavy metal adsorbent, and mineral content was added by increasing ■.

In the above embodiment, the filtration layer 6 has a four-layer structure consisting of silver activated carbon, a mineralizing agent, and one silver activated carbon and a heavy metal adsorbent, but the layer structure of the filtration layer 6 is not limited to this. It can also have a four-layer structure of CI pear-type strong base anion exchange resin, silver activated carbon and one heavy metal adsorbent, or a four-layer structure of silver activated carbon, Na-type strong acidic ion exchange resin, and silver activated carbon and one heavy metal adsorbent. However, it can also have a two-layer structure of silver activated carbon and heavy metal adsorbent.

Although the water retaining member 7 in the above-mentioned embodiment is arranged on the outer periphery of the filtration layer 119, the water retaining member is arranged in the water flow direction within the filtration layer 29, for example, like the water retaining member 27 of the water purifier 21 shown in FIGS. 5 and 6. The length of the filter layer can be approximately equal to the length of the filter body, and the cross section perpendicular to the water flow direction can be extremely small with respect to the cross section of the filter layer. That is, the filtration layer 29 of the water purifier 21 is the water passage plate 26A.

The first layer portion 28A of silver activated carbon, the second layer portion 28B of mineralizing agent, the 311th layer portion 28G of silver activated carbon, and the fourth layer portion 28D of heavy metal adsorbent are arranged via 30A, 30A, 30A and 26B. A water retaining member 27 is vertically arranged at the center of each body and water passage plate. In this case, most of the water introduced into the vessel passes through the first layer section 28A to the fourth layer section 28D, as shown in FIG.
Although it is filtered, a small portion of the water rises through the water retaining member 27 and is mixed with water that has been treated with silver activated carbon, a mineralizing agent, and a heavy metal g-adsorbent to form filtered water. (See arrow part in Figure 8).

When the water purifier 21 is stopped, the antibacterial effect of the silver component and the trace amount of chlorine in the water contained in the water retaining member prevent the growth of bacteria in the water remaining in the device, as in the case of the previous embodiment. .

(Effects of the Invention) As explained above, in the present invention, since the filtration layer is composed of the silver activated carbon body and the heavy metal adsorbent body, most of the chlorine content in chlorine-sterilized water and the activated carbon adsorbed components are removed. , and the heavy metal components have been adsorbed and removed, making the water preferable for drinking, and when the water purifier is stopped, the antibacterial action of the silver component of the filter layer silver activated carbon and the fine fr
The chlorine content in i prevents bacterial growth in the water inside the vessel. Therefore, in the water purifier of the present invention, suitable drinking water without bacterial growth can be obtained immediately after opening the tap, which is convenient.

[Brief explanation of drawings]

The figures show one embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of a water purifier, Fig. 2 is an enlarged sectional view taken along line ■-■ in Fig. 1, and Fig. 3 is a front view of a water passage plate. Fig. 4 is an explanatory diagram of the operation of the main parts of the water purifier, Fig. 5 is a vertical sectional view of the water purifier of another embodiment, and Fig. 6
The figure is an enlarged sectional view taken along the line Vl-Vl of the fifth factor, FIG. 7 is a front view of the water passage plate, and FIG. 8 is an explanatory diagram of the operation of the main parts of the water purifier. 1.21...Water purifier 2...Base 3...Water guide hole 5...Case 7.27...Water retaining member 8A, 28A...First layer portion 80, 280...Third Layer parts 8D, 28D... Fourth layer part 9.29... Filtration layer 11... Lid body 12... Drain pipe

Claims (1)

[Claims] In the main body of the water purifier, in which chlorine-sterilized water supplied from one side of the case passes through a filtration layer in the case and is discharged from the outlet of the other side of the case, the filtration layer contains approximately 0.05 silver.
It consists of a layer of activated carbon carrying ~1.0% by weight of silver and a layer of a heavy metal adsorbent that adsorbs heavy metals, and a water-retaining layer that is permeable and has water-retaining properties is provided around or inside both layers. A main body structure of a water purifier, characterized in that the members are arranged in such a manner that the lengths in the water flow direction of both layers are approximately equal, and the amount of water flowing into both layers is extremely small.