Chemistry: electrical and wave energy – Apparatus – Electrolytic
Patent
1993-07-09
1994-12-20
Valentine, Donald R.
Chemistry: electrical and wave energy
Apparatus
Electrolytic
C25B 900, C25B 1502
Patent
active
053743415
DESCRIPTION:
BRIEF SUMMARY
FIELD OF TECHNOLOGY
The present invention relates to a water electrolyzer, more precisely relates to a water electrolyzer, which electrolyzes raw water in an electrolyzing section to alkali water and acid water by supplying electric power to electrodes in the electrolyzing section.
BACKGROUND OF TECHNOLOGY
A conventional water electrolyzer, which electrolyzes raw water in an electrolyzing section to alkali water and acid water by supplying electric power to electrodes in the electrolyzing section, has been known. An example is disclosed in Japanese Patent Publication No. 60-20073. The water electrolyzer disclosed in the Japanese Patent has an electrolyzing section whose inner space is divided into a cathode chamber and an anode chamber by a porous partition. There is provided an electrode in each chamber so as to electrolyze raw water. Alkali water is produced in the cathode chamber; acid water is produced in the anode chamber. The proper pH value of alkali water for drinking is 8.5-9.5. In the case of less than pH 8.5, electrolyzed water is almost the same as raw water. On the other hand, in case of more than pH 10.0, it is harmful for human bodies to drink. Therefore, in the conventional water electrolyzer, fixed electric power based on the capacity, etc. of the electrolyzing section is supplied to the electrodes to maintain the pH value of the alkali water between 8.5-9.5 pH.
However, the conventional method of maintaining the pH value has the following disadvantage.
Fixed electric power supplied to the electrodes to maintain the pH value in the prescribed range is defined under the condition that the electrolyzing section is filled with raw water. If the electrolyzing section is not filled with raw water and the fixed electric power is supplied to the electrodes, the electrlyzing capability is too high and the pH value will be in the harmful range: greater than 9.5.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a water electrolyzer, which is capable of maintaining the pH value of electrolyzed water in a predetermined range without reference to the quantity of water in the electrolyzing section.
To achieve the object, the water electrolyzer has the following structure.
In a first basic structure, an electrolyzing section has electrodes for electrolyzing raw water to alkali water and acid water. Detecting means detects pressure of raw water introduced into the electrolyzing section. Adjusting means adjusts electric power supplied to the electrodes. Control means for controlling the adjusting means to adjust electric power supplied to the electrodes on the basis of water pressure detected by the detecting means so as to maintain the pH value of the alkali water or the acid water in the prescribed range.
In a second basic structure, an electrolyzing section has electrodes for electrolyzing raw water to alkali water and acid water. Detecting means detects the pressure of raw water introduced into the electrolyzing section. A rectifier circuit rectifies AC voltage supplied from an electric power source. A driver circuit inputs DC voltage rectified by the rectifier circuit to the electrodes. Memory means stores input patterns of the DC voltage to the electrodes on the basis of the pressure of raw water introduced into the electrolyzing section so as to maintain the pH value of the alkali water or acid water. Control means receives the pressure of raw water introduced into the electrolyzing section from the detecting means, reads the input pattern of the DC voltage out from the memory means so as to maintain pH value of the alkali water or acid water, and inputs the DC voltage to the electrodes by the driver circuit on the basis of the input pattern read out.
In the first basic structure, the control means controls the adjusting means to adjust electric power supplied to the electrodes on the basis of water pressure detected by the detecting means. Therefore, the pH value of the alkali water or the acid water can be maintained in the prescribed range without reference to quan
REFERENCES:
patent: 4533451 (1985-08-01), Kumazawa
patent: 4946574 (1990-08-01), Lin
patent: 5051161 (1991-09-01), Yamaguchi et al.
Aoki Kazuaki
Miyazawa Shozo
Tadokoro Tomio
Techno Excel Kabushiki Kaisha
Valentine Donald R.
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