JPH0686972A - Water purifier - Google Patents

Abstract

PURPOSE:To obtain a safe water purifier suppressing the propagation of various bacteria by providing a filter member obtained by supporting Pt on the surface of a white inorg. porous member with a special specific surface area composed of silicon dioxide as a water treatment catalyst and arranging a window at a position capable of observing the water purifier filter part thereof from the outside. CONSTITUTION:At least one kind of an element selected from Pt, Pd, Ag, An, Mn and Fe, a metal salt thereof or oxide thereof is supported on a white inorg. porous member with a specific surface area of 200-700m<2>/g composed of silicon dioxide as a water treatment catalyst to form a filter member 4 which is, in turn, received in a container 3. Further, windows 6, 7 are arranged at positions capable of observing the water purifier filter part composed of the white inorg. porous member from the outside. As a result, a safe water purifier suppressing the propagation of various bacteria is obtained and the lowering of the capacity of a filter agent can be certainly judged by a user.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purifier, and more particularly to a water purifier having improved antibacterial properties of accumulated water in the water purifier.

[0002]

2. Description of the Related Art Conventionally, in order to improve the antibacterial property of accumulated water in a water purifier, activated carbon is put inside the water purifier, and the adsorbing action of the activated carbon removes various impurities including malodorous components in the tap water. The water purifier that does was the mainstream. Recently, hollow fiber membranes have been used which have improved filtration efficiency of impurities in water by a filtering action.

[0003]

By the way, tap water is sterilized by chlorine ions, and the growth of bacteria is suppressed by residual chlorine. Since it is removed, it becomes an environment where various bacteria can easily grow. In particular, when left after using the water purifier, bacteria are often found in the accumulated water due to invasion of bacteria from the water outlet of the water purifier and growth of bacteria contained in a small amount in tap water. In particular, in the water purifier of the type in which the recently spread hollow fiber membrane is used in the lower stage of activated carbon, there are cases in which the hollow fiber serves as a growth substrate for various bacteria. Therefore, a safe water purifier that suppresses the growth of various bacteria is desired. Furthermore, there is a demand for a water purifier that allows the user to accurately judge the deterioration of the performance of the filter medium.

In consideration of the above problems of the conventional water purifier, the present invention provides a safe water purifier which suppresses the growth of various bacteria, and a water purifier capable of accurately judging the deterioration of the performance of the filter medium to the user. That is the purpose.

[0005]

The present invention is a water purifier in which a filtering member is provided with an inorganic porous material having a specific surface area of 200 to 700 m ² / g and made of silicon dioxide or the like.

Further, the above-mentioned inorganic porous material has at least one element selected from Pt, Pd, Ag, Zn, Mn and Fe, a metal salt or its oxide as a water treatment catalyst on the surface of the porous material. It is carried.

Further, the inorganic porous material has a white color, and the filtration member can be observed from the outside.

[0008]

In the present invention, the specific surface area is 200 to 700 m ² / g
By using the inorganic porous body of the above as a water purifier filtration member,
Adsorbs and removes contaminants in water and has the ability to adsorb and purify iron rust contained in tap water.

On the surface of the porous body, Pt, Pd, A
By using a material carrying at least one element selected from g, Zn, Mn and Fe, a metal salt or an oxide thereof as a catalyst for water treatment, components such as chlorine and hypochlorous acid in tap water can be removed. Catalytic reduction, ionization, and adsorption filtration are possible.

[0010] Next, Pt, Pd, Ag, Zn, carried on the filter member,
The catalytic action of Mn, Fe, etc. secondarily exerts an action of suppressing the growth of microorganisms. This deterrent action has the effect of suppressing the generation of bacteria in the water in the vicinity of the filtering member, and suppresses the spoilage of accumulated water when the water purifier is left standing.

Further, when a water purifier filter member made of a white inorganic porous material is used, a large amount of foreign substances are adsorbed by the water purifier filter member and its filtering ability is lowered, so that the foreign substances are colored such as iron rust or black. Since it contains a lot of things, the white filter portion is colored, and the user is informed of the deterioration of the performance and the replacement time of the filter member.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a cross-sectional view of a water purifier according to an embodiment of the present invention, in which a water purifier water inlet 2 is opened in a water purifier housing 1 having a height of about 20 cm and a diameter of about 15 cm, and filtration is performed therein. The member storage container 3 and the filtering member 4 are stored, and the water outlet 5 is provided at the upper position. Observation window 6 provided in the filtering member storage container 3 and observation window 7 provided in the water purifier housing 1.
Are provided, and the filtering members 4 are each made of a transparent material at a position where they can be observed from the outside.

First, a method of adjusting the filtering member used in the water purifier of this embodiment will be described.

As a raw material, silica gel having a specific surface area of about 500 m ² / g and an average particle diameter of about 0.5 mm is prepared.

When a Pt, Pd, Ag system as a noble metal catalyst is used, a nitrate or a nitric acid-ammonia complex salt is adsorbed and supported on silica gel so as to be 0.1 to 1 wt%, and after drying, 300 Pyrolysis is performed at ˜600 ° C. for 30 minutes to obtain a filtration member.

When using Mn, Fe, and Zn based materials, chlorides are used respectively, and each is 50 to 200 g /
l solution, which is adsorbed and supported so as to be 3 to 15 wt% in terms of metal element, dried, reduced with 0.5 wt% ammonia water, air-dried, and dried at 300 to 600 ° C. to be used as a filter member. .

When it is desired that ClO ⁻ is 0.1 ppm or less as filtered water in terms of ClO ⁻ ion in water, P
When using t, Pd, Ag-based filter water of 0.1 ppm or more, it is desirable to use a Mn, Fe, Zn-based catalyst filter member.

The supported amount of each catalyst was determined in consideration of economic efficiency and practical life.

The reason why the specific surface area of the white inorganic porous filter member is 200 to 700 m ² / g is 200 m ²
If it is less than / g, a large amount of filtering member is required, resulting in high cost. On the other hand, if it is 700 m ² / g or more, the strength of the inorganic porous material filtering member becomes weak, which is not only practical but also costly for making it porous.

Next, the operating principle of the water purifier of this embodiment will be described.

From the water inlet 2 of the water purifier, tap water flows into the filter member container 3 in the water purifier housing 1 from above. This water becomes water from which chlorine and foreign substances have been removed while passing through the filtering member 4, exits from the filtering member storage container 3, and exits from the water outlet 5
Collected in.

Since chlorine, which is a sterilizing component, disappears from the vicinity of passing through the filter member 4, the action of suppressing the growth of various bacteria by the tap water itself is reduced.

However, Pt, P carried on the filtering member 4
By the catalytic action of d, Ag, Zn, Mn and Fe,
Secondly, it exerts an effect of inhibiting the growth of microorganisms.

This is what is generally known as oligodynamic action. That is, an extremely small amount of an active substance such as ozone produced in the vicinity of the catalyst by the above-mentioned catalyst material damages the cell membrane on the surface of the microbial tissue and suppresses the growth of the microorganism.

The number of microorganisms (cfu / cm ³ ) in the water discharged from the water purifier of this example is shown in (Table 1).

[0027]

[Table 1]

From these results, in the present example, the effect of suppressing the growth of microorganisms was confirmed by the effect of suppressing the growth of the filter member even if the filter member was left standing after water intake.

Further, as the adsorption capacity of the filter member is lowered, the filter member becomes dirty with the substance to be adsorbed and does not show a white color.
The replacement time could be confirmed through the observation window.

Alternatively, when the case and the storage container are made of a transparent member, the observation window is not necessary.

[0031]

As is apparent from the above description,
INDUSTRIAL APPLICABILITY According to the present invention, foreign matter in water can be effectively adsorbed and removed by using an inorganic porous body having a specific surface area of 200 to 700 m ² / g composed of silicon dioxide or the like as the filtering member.

Further, Pt, Pd, carried on the filter member,
The catalytic action of Ag, Zn, Mn, Fe, etc. can secondarily inhibit the growth of microorganisms. By this deterrent effect, generation of various bacteria in the water in the vicinity of the filter member is suppressed, and spoilage of accumulated water in a state where the water purifier is left is suppressed. As a result, safe water with a small number of bacteria can be supplied when the water purifier is used again.

Further, by using a material supported on the surface of porous silicon dioxide as a catalyst for water treatment, components such as chlorine and hypochlorous acid in tap water are catalytically reduced, ionized and adsorbed and filtered to obtain chlorine. It has the effect of supplying so-called delicious water with no odor.

Further, the use of the water purifier filtering section made of the white inorganic porous material has the effect of displaying the user's replacement time of the filtering member due to the decrease in the adsorption capacity and the coloring due to the adsorption of the colored foreign matters. .

Further, since the wood-based filter member is not used as the filter member, not only the nature protection but also the pollution at the time of activation does not occur, and the utilization effect and the economic effect are great from the viewpoint of ecology.

Further, by using silicon dioxide, which has the largest amount of ground surface composition, as a filter member, it is possible to manufacture, use, replace, and
The use effect is very large, for example, a cleaner operation is possible at the time of disposal.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a water purifier according to an embodiment of the present invention.

[Explanation of reference numerals] 1 water purifier housing 2 water purifier water inlet 3 filtering member storage container 4 filtering member 5 water outlet 6 observation window provided in the filtering member storage container 7 observation window provided in the water purifier housing

Claims (4)

[Claims] 1. A water purifier comprising an inorganic porous body having a specific surface area of 200 to 700 m ² / g as a filtering member. 2. The inorganic porous material has a white color, and can be observed from the outside of the main body so that stains resulting from adsorption of foreign matters can be distinguished by a change in color. The water purifier according to Item 1. 3. The water purifier according to claim 1, wherein the inorganic porous body is composed of silicon dioxide. 4. Pt, Pd, A on the surface of the inorganic porous body
The water purifier according to claim 1 or 3, wherein at least one element selected from g, Zn, Mn, and Fe, a metal salt, or an oxide thereof is supported as a water treatment catalyst.