JPH06277667A - Water preparation device - Google Patents

Abstract

PURPOSE:To make the interval of electrodes in an electrolytic cell as small as the thickness of a diaphragm, reduce the electrolytic voltage and enhance the degree of freedom of flow path design by disposing porous or mesh-shaped electrodes in the state of being close to the diaphragm in a built-in electrolytic cell. CONSTITUTION:An anode 2 and a cathode 3 for performing electrolysis of water to be supplied are provided in an electrolytic cell 1 built in a water preparation device for preparing ionic water, and the anode and cathode are formed by processing a titanium plate into the mesh shape and then plating its surface with platinum. A diaphragm 4 composed of a porous sheet of polyvinylidene fluoride or the like provided with hydrophilic properties by titanium oxide is interposed between both electrodes 2 and 3, and electrolytic cases 5, 5 are disposed on the outside of respective electrodes 2 and 3 through silicone spacers 6 for securing the flow paths of water. The electrolytic cell 1 is constituted by clamping the spacers 6, the anode 2, the diaphragm 4 and the cathode 3 clamped between both electrolytic cases 5, 5 and tightening bolts 7 and nuts 8.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water conditioner, and more particularly to the structure of an electrolytic cell incorporated in the water conditioner.

[0002]

2. Description of the Related Art Conventionally, water purifiers have produced ionic water by the process shown in FIG. That is, the water conditioner uses an activated carbon filter 20 for removing chlorine and organic substances contained in raw water such as tap water, and a hollow fiber filter 21 of about 0.1 μm for removing various bacteria and rust contained in water. In an electrolytic cell 25, which is filtered to obtain purified water, and which comprises the anode 22 and the cathode 23 installed at intervals of about several millimeters and a diaphragm 24 installed between both electrodes so as not to contact them. Electrolysis of water to cause an electrolysis reaction of water causes an oxygen generation reaction as shown in the following formula (1) on the anode 22 side, and H ⁺ ions generated at the same time as oxygen gas generate acidic ionized water. generates, similarly, a hydrogen generating reaction as shown in the following equation (2) gives rise at the cathode 23 side, was generated alkali ion water by OH ^{chromatography} ions generated simultaneously with the hydrogen gas.

[0003]

[Chemical 1]

These ionized waters are separated by the diaphragm 24 and can be independently taken out without being neutralized.

[0005]

However, in the conventional water purifier as described above, since the electric conductivity of the purified water used for electrolysis is small, electrolysis of the purified water is performed even if the electrode interval is about several millimeters. A large voltage was required to cause In addition, in order to reduce the electrolysis voltage, attempts have been made to reduce the electrode spacing, but when the electrode spacing is reduced, the flow path of water becomes narrow, and there is a problem that the required flow rate cannot be obtained by electrolysis. As such, it was not a fundamental solution.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a water conditioner provided with an electrolytic cell having a small electrolysis voltage and a high degree of freedom in flow channel design. There is.

[0007]

In order to achieve this object, the water conditioner of the present invention is arranged in a built-in electrolytic cell with a porous or mesh-shaped electrode in close contact with a diaphragm. It is set up.

[0008]

The porous or mesh electrode is disposed in close contact with the diaphragm in the electrolytic cell incorporated in the water conditioner of the present invention having the above-mentioned structure and is incorporated therein. Since the electrode interval of the electrolytic cell can be reduced to the thickness of the diaphragm, the electrolysis voltage is reduced. Further, since the flow path of water to be electrolyzed is provided outside the electrode, it can be freely designed so as to obtain a predetermined flow rate without affecting the electrolysis voltage.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

First, the structure of the electrolytic cell 1 incorporated in the water conditioner of the present invention will be described with reference to FIG. The anode 2 and the cathode 3, which are provided as electrodes for electrolyzing the supplied water, are made by expanding a titanium plate having a thickness of 1 mm (millimeters) into a mesh, and then plating the surface with platinum. 0.5 μm (micrometer). A diaphragm 4 is sandwiched between the anode 2 and the cathode 3, and the diaphragm 4 is made of a polyvinylidene fluoride porous sheet having a thickness of 0.2 mm and made hydrophilic by titanium oxide. It is configured. In addition, an electrolytic case 5 made by ABS resin molding is provided on the outside of both electrodes.
This electrolytic case 5 holds an electrode, a diaphragm, and an electrode in which an anode 2, a diaphragm 4, and a cathode 3 are stacked in this order, and a silicon spacer 6 that secures a flow path of water to be electrolyzed.
Is fixed with bolts 7 and nuts 8 in a state of being sandwiched between the electrodes and the electrodes, and these constitute the electrolytic cell 1. Here, the apparent electrode area of the electrolytic cell 1 is 100 cm ² (square centimeter), and FIG. 2 is a sectional view of the electrolytic cell configured as described above.

Next, the production process of ionized water by the water purifier of the present invention will be described in order with reference to FIG. First, the supplied tap water is filtered by an activated carbon filter and a hollow fiber filter to obtain purified water, and the purified water is introduced into the electrolytic cell 1 through the water inlet 9. The purified water introduced is divided into an anode chamber 10 and a cathode chamber 11 at the lower part of the electrolytic cell, and flows through the respective electrode chambers toward the upper part of the electrolytic cell. Next, a potential difference is applied between the anode 2 and the cathode 3, H ⁺ ions are generated by the oxygen generation reaction on the anode 2 side, and the water in the anode chamber 10 becomes acidic.
On the other hand, on the cathode 3 side, OH ⁻ ions are generated by the hydrogen generation reaction, and the water in the cathode chamber 11 becomes alkaline. And
Water in the anode chamber 10 that has become acidic and water in the cathode chamber 11 that has become alkaline are respectively discharged from the acidic water outlet 12 and the alkaline water outlet 13 at the upper part of the electrolytic cell.

Next, using the above-described water conditioner of the present invention,
The results of actual experiments of generating acidic water and alkaline water will be described in detail. First, as the conditions of the experiment, a constant voltage system was used for electrolysis and the voltage was DC 10V (volt). The electrolyzed water used is an activated carbon filter, purified water that has passed through a 0.1 μm hollow fiber filter, and the flow rate is an alkaline water flow rate of 2.0.
l / min (liter / min), acidic water flow 2.0 l / min
And As a result of the experiment, alkaline water pH 10.2 and acidic water pH 4.0 were obtained, and the electrolysis current was 2.0 A (ampere).
Met. For comparison, a similar experiment was conducted using a water conditioner equipped with a conventional type electrolytic cell. The electrolytic cell of the water conditioner used in the experiment had an electrode area of 300 cm ² and an electrode distance of 3.0 mm.
Is. A constant voltage system was used for electrolysis, and the voltage was DC 25V. As the electrolyzed water, as in the above experiment, purified water that had been passed through an activated carbon filter and a hollow fiber filter was used, and an alkaline water flow rate was 2.0.
L / min, and acidic water flow rate was 2.0 L / min. As a result of the experiment, the pH of the alkaline water was 9.9, the pH of the acidic water was 4.7, and the electrolytic current was 1.5A.

As can be seen from the above experimental results, the water purifier according to the present invention can flow an electrolytic current of 1.3 times at a voltage of 2/5, though the electrode area is 1/3 that of the conventional one. As a result, highly concentrated alkaline water and acidic water could be obtained. In addition, the electrolytic cell 1 built in the water conditioner of the present invention has a predetermined pressure by changing the thickness of the silicon spacer 6 without changing the electrodes 2, 3, the diaphragm 4, etc., and changing the flow path. A predetermined flow rate could be obtained. Furthermore, since the electrodes 2 and 3 hold the diaphragm 4,
The merit that no part for holding the diaphragm 4 is required is also obtained.

[0014]

EFFECTS OF THE INVENTION As is clear from the above description, the water conditioner of the present invention is provided with a porous or mesh-shaped electrode placed in close contact with the diaphragm in the built-in electrolytic cell. By providing the electrolysis tank, the electrode interval can be reduced to the thickness of the diaphragm, so that the electrolysis voltage can be reduced, and the passage of water for electrolysis can be provided outside the electrodes. It can be freely designed so that a predetermined flow rate can be obtained without affecting the electrolysis voltage.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an electrolytic cell incorporated in a water conditioning machine of the present invention.

2 is a cross-sectional view of the electrolytic cell shown in FIG.

FIG. 3 is a diagram showing a configuration of a conventional water conditioning machine.

[Explanation of symbols]

 1 Electrolyzer 2 Anode 3 Cathode 4 Diaphragm

Claims (1)

[Claims] 1. A water conditioner characterized in that a porous or mesh-shaped electrode is provided in a built-in electrolytic bath in a state of being in close contact with a diaphragm.