JPH08193346A - Washing device of water closet - Google Patents

Abstract

PURPOSE: To prevent the adherence of urinary calculuses and the generation of bad small in a water closet for a long time and to eliminate or greatly reduce labor for cleaning the water closet in periodical work. CONSTITUTION: A washing device is equipped with a storage tank A of water closet washing water (w) connected to a water closet B and a pair of water electrolyzing electrodes 1 and 2 applying water electrolyzing voltage arranged in the water in the tank A. At least one of a pair of electrodes 1 and 2 is formed of zinc or magnesium, the electrode of zinc or magnesium is used as the anode to apply the water electrolyzing voltage.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toilet flushing device for flushing a flush toilet in a flush toilet to flush the toilet with water.

[0002]

2. Description of the Related Art In flush toilets used in toilets such as general households and public toilets, after use, toilet flushing water for flushing filth and flushing the toilet is flushed.

[0003]

However, as the toilet bowl is used more and more, urine stones adhere to the toilet bowl, causing a bad odor. Therefore, the toilet bowl is usually cleaned regularly, but this is time-consuming. This point, actual Kaihei 5
No. 30271 discloses that a first and a second electrode are arranged in washing water in a water storage tank connected to a toilet bowl, and a DC voltage equal to or lower than an electrolysis voltage of the washing water while alternately inverting the polarities between these electrodes. When the polarity is reversed, a strong current is instantaneously applied by the semiconductor effect due to the substances contained in the wash water, such as metal, to decompose the wash water molecules into small particles while preventing electrolysis of the wash water. Improves the solubility of other substances in water, thereby obtaining a constant deodorizing effect,
Teaching to clean the water tank and toilet bowl.

From the viewpoint different from the technique taught by Japanese Utility Model Laid-Open No. 5-30271, the present invention suppresses the adhesion of urine stones and the generation of offensive odors in flushing toilet bowls, and saves the trouble of cleaning the toilet bowls by regular work. It is not necessary or it is intended to be significantly reduced.

[0005]

Means and Actions for Solving the Problems The inventors of the present invention have conducted extensive studies to solve the above problems, and use water treated with a treatment for lowering the oxidation-reduction potential (hereinafter referred to as “reduced water”) in a toilet bowl. The present invention has been completed by finding that urine stones can be prevented from adhering and the generation of foul odors can be suppressed by pouring, and that this reduced water can be easily generated by electrolyzing toilet flush water using zinc or magnesium as electrodes.

[0006] That is, the present invention, in order to solve the above problems, a tank for storing toilet flush water connected to the flush toilet,
A pair of electrodes for water electrolysis, which are arranged in water in the tank and to which a voltage for water electrolysis is applied, at least one of the pair of electrodes is made of zinc or magnesium, and is made of zinc or magnesium. It is intended to provide a flushing device for a toilet, which is characterized in that the above-mentioned voltage is applied using an electrode as an anode.

[0007] Normally, the flush water storage tank is connected to the toilet via a suitable valve. According to this water washing device, washing water is stored in the washing water storage tank, a pair of (anode and cathode) electrodes for water electrolysis are arranged in the water, and a voltage for water electrolysis is applied to both electrodes. This voltage application is performed by an electric circuit connected to both electrodes for applying a voltage for electrolyzing the washing water, and the electric circuit is usually one that can apply a DC voltage capable of electrolyzing water. is there. At this time, the cathode reaction and the anode reaction are as follows, respectively. Cathode reaction 2H ₂ O + 2e ⁻ → H ₂ ↑ + 2OH ⁻ That is, two electrons emitted from the cathode react with two water molecules to generate one molecule of hydrogen and two hydroxide ions. This molecular hydrogen is generated as hydrogen gas, and the hydroxide ion remains in water.

When the wash water is general tap water, calcium ions and magnesium ions contained in the tap water are reduced and deposited, though very slowly. Ca ²⁺ + 2e ⁻ → Ca Mg ²⁺ + 2e ⁻ → Mg Anode reaction In the case of a zinc electrode, zinc is eluted as zinc ions.

Zn → Zn ²⁺ + 2e ⁻ A part of the produced Zn ²⁺ reacts with OH ⁻ to produce zinc hydroxide. In the case of Zn ²⁺ + 2OH ⁻ → Zn (OH) ₂ magnesium electrode, magnesium is eluted as magnesium ions.

Mg → Mg ²⁺ + 2e ⁻ A part of the produced Mg ²⁺ reacts with OH ⁻ to produce magnesium hydroxide. Mg ²⁺ + 2OH ⁻ → Mg (OH) ₂ By thus forming the anode with zinc or magnesium, hydrogen is generated from the cathode by electrolysis, and zinc ion Zn ²⁺ or magnesium ion Mg ²⁺ is generated at the anode.
Elutes. Since the hydroxide ion (OH ⁻ ) remains in the water, the water exhibits alkalinity and the redox potential (OR
Lower P). By using this water as flushing water for the toilet bowl of the toilet, the generation of offensive odor is suppressed, and the adhesion of urine stones to the toilet bowl is suppressed.

During the electrolysis reaction, zinc hydroxide and magnesium hydroxide are also generated, but since they do not adhere to the electrodes and diffuse into water, they do not interfere with the electrolysis reaction. Further, since it is white, it does not unpleasantly color the white toilet bowl, for example, even if it is poured into the toilet bowl. Moreover, since both zinc and magnesium have little toxicity, wastewater treatment is easy. Even if iron or stainless steel is used for the anode, the redox potential can be lowered, but since the oxide adheres to the electrode surface and interferes with the electrolysis reaction, there is a problem that the reaction rate is slow. In addition, when the oxide dissolves in water to color the water brown, and when this water is poured into the toilet bowl, it has the effect of suppressing the attachment of urinary stones and the generation of foul odors, but the toilet bowl has brown streaks and is easy to There is a problem that it can not be removed and the aesthetics are spoiled.

In the water washing apparatus of the present invention, at least one of a pair of electrodes for electrolyzing water is made of zinc or magnesium, and if an electrode made of zinc or magnesium is used as an anode, a voltage for water electrolysis is applied. However, both the pair of electrodes may be made of zinc or magnesium, and the polarity of the DC voltage applied to the pair of electrodes may be inverted at a predetermined cycle. In this case, the electric circuit for applying the electrolysis voltage for the cleaning water connected to the pair of electrodes may include a polarity control circuit for inverting the applied voltage in such a predetermined cycle.

When both the pair of electrodes are made of zinc or magnesium and the polarity of the applied voltage is inverted at a predetermined cycle, the following advantages can be obtained. That is, if the washing device is used for a long period of time, calcium and magnesium contained in tap water will deposit on the cathode and cover the electrode surface, and as the thickness increases, the calcium and magnesium will gradually peel off and enter the water, depositing in the tank and becoming dust. May cause clogging of piping and toilet bowl. Further, zinc and magnesium in the anode are eluted and consumed. Therefore, both electrodes are made of the same material and the anode and cathode are switched at a predetermined cycle,
By using 50% and 50%, the deposition of calcium, magnesium, etc. per unit area of the electrode can be halved, and the consumption rate of the electrode can be halved to reduce the maintenance frequency in half.

In the water washing apparatus of the present invention, one or both of the pair of electrodes may be made of zinc. When one or both of the pair of electrodes is made of zinc in this way, a magnesium electrode is adopted. In this case, it is possible to avoid the inconvenience, that is, the magnesium electrode consumes more electrode than the zinc electrode, the surface becomes rough, and fine magnesium fragments are separated and settled.

In any of the above washing devices,
The electrode may be housed in an insulating protective frame that allows water to flow so that the electrode does not come into contact with the human body. By providing the protective frame in this manner, it is possible to prevent electric shock during maintenance and it is safe. Further, in any of the above-described water washing devices, the electrode may be covered with a filter for preventing a substance peeled from the electrode from being mixed in the washing water.

By covering the electrodes with a filter in this way, it is possible to prevent the deposits of calcium, magnesium, etc. generated as described above from mixing in water, and to prevent zinc compounds or magnesium compounds from mixing in the waste liquid. It can be prevented as much as possible. Further, in any of the above water washing devices, a means for stirring the washing water to be electrolyzed (for example, a rotationally driven propeller for stirring water) is provided so as to enhance the efficiency of the electrolysis reaction of the washing water. Good.

By providing such a stirring means, hydrogen gas can be easily separated from the cathode, hydroxide can be easily separated from the anode, and the ion concentration can be made uniform, whereby the electrolysis reaction of water can be performed. Can be promoted. Further, in any of the above-mentioned water washing devices, an electric circuit for applying a voltage for electrolyzing wash water is provided with current regulating means (current limiting circuit) for suppressing the current flowing by the electrolysis reaction of water to a predetermined value or less. May be. By providing such a current regulation means, even if there is a possibility that an excessive current may flow depending on the usage conditions because the conductivity varies depending on the water quality, this excessive current can be regulated.

Further, when the current regulating means (current limiting circuit) is provided in this way, as the means, a means capable of changing the current regulating value (current limiting value) may be adopted. If you can change the current regulation value in this way, if the frequency of use of the toilet bowl changes depending on the time of day, for example, in a toilet such as a tourist area, the frequency of use is low on weekdays, many holidays, and in offices such as companies. The frequency of use of washing water can be changed in response to changes in the frequency of use, such as frequent use on weekdays and few holidays, thereby suppressing electrode wear and deposition of calcium, magnesium, etc., and The power consumption can be suppressed.

In any of the above washing devices,
It is also possible to provide an application section in which the voltage for water electrolysis is applied and a non-application section in which it is not applied within a predetermined time, and to make it possible to change the duty ratio of the application section and the non-application section. In this case, as an electric circuit for applying a voltage for electrolysis of washing water connected to the pair of electrodes, the voltage is applied in a predetermined application section for applying a voltage for water electrolysis within a predetermined time, An ON / OFF duty adjustment unit that includes an electrolysis ON / OFF control signal generation circuit that stops voltage application in a predetermined non-application period in which no voltage is applied and that can change the duty ratio of voltage application and non-application within the predetermined time. It is sufficient to adopt the one including.

By configuring the water washing device in this way, the voltage for water electrolysis can be applied intermittently, and the ON / OFF duty can be changed.
It becomes possible to control the electrolysis reaction rate of the wash water. In addition,
In this way, the voltage for water electrolysis is applied intermittently,
Although it is possible to use both the ON / OFF duty changeable configuration and the current limit value changeable configuration, the electrolysis reaction can be achieved by adopting only one of the two. The speed can be controlled.

In any of the above washing devices,
The voltage applying circuit may include a timer circuit capable of setting how many hours in a day it is operated, when to start the operation, and when to stop the operation. If such a timer circuit is provided, for example, in a toilet of an office building, it is operated only from 8 am to 7 pm during working hours.
After that, it is possible to take a rest.

[0022]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 schematically shows the structure of a water washing device WCL commonly provided for a plurality of toilet bowls B arranged in a toilet of an office building, with some parts omitted. This flushing device
A tank A for containing flush water is provided, and one tank is commonly provided for a plurality of toilet bowls B arranged, and is connected to each toilet bowl B via a valve V. The valve V is opened for a predetermined period of time by a valve control device (not shown).

The water washing device WCL includes a pair of electrode plates 1 and 2 arranged in the tank A. The electrode plates 1 and 2 are both made of zinc in this example. Figure 2
As shown in FIG. 1, the electrode plate 1 has an electrode terminal 3 connected to it.
However, in the electrode plate 2, the electrode terminals 4 connected thereto are connected to the circuit CONT (see FIGS. 1 and 5) for applying the electrolysis voltage of the wash water by the energizing cords 5 and 6, respectively. . Each electrode terminal 3 and 4 is covered with a cover to have a waterproof structure to prevent corrosion. Further, the energizing cords 5 and 6 are also covered with a cover to cover at least the portion arranged in the washing water to have a waterproof structure to prevent corrosion.

Each of the electrode plates 1 and 2 is passed through a rod 8 made of an electrically insulating material at each of its four corners, and a spacer 7 made of an electrically insulating material provided in advance on the rod.
Is fixed and supported by the rod in a state of abutting against. Therefore, the two electrode plates 1 and 2 are opposed to each other at a predetermined interval by the spacer 7. Both electrode plates 1 according to the size of the spacer 7,
The amount of current flowing is determined by the interval of 2. The smaller the spacer 7 and the smaller the distance between the zinc electrode plate 1 and the zinc electrode plate 2, the larger the current amount. Therefore, although this interval is constant in this example, as will be described later, this interval can be adjusted instead of adjusting the output voltage of the circuit CONT according to the conductivity of the water used.

Further, as shown in FIG. 2, both electrode plates 1, 2
A water agitation bropeller 101 of an agitator 10 for agitating water is inserted between the two in order to increase the electrolysis efficiency of the washing water, and this propeller is rotationally driven by a motor 102. Although not shown in FIG. 2, both electrode plates 1 and 2 are made of an electrically insulating material, as shown in FIG.
It is surrounded by a cage-shaped protective frame 9 which is a combination of rods at predetermined intervals for preventing electric shock during maintenance. The protective frame 9 is fixed to the rod 8.
The electrode plates 1 and 2 are supported via the rod, and a predetermined distance is maintained from the electrode plates 1 and 2. The motor 102 for driving the propeller is fixed and supported by the protective frame 9.

Although not shown in FIG. 3, the protective frame 9
As shown in FIG. 4, a net-shaped filter 11 is covered with the electrode plates 1 and 2 covered with the filter 11. The filter 11 is partially shown in FIG. 4, and the rest is schematically illustrated only by a contour. The filter 11 prevents calcium and magnesium in the water deposited on the electrode plate from peeling off and falling to the bottom of the tank A or mixing in water. In this embodiment, the electrode plates 1 and 2 are made of zinc. However, when the electrode plates 1 and 2 are made of magnesium, a small amount of a small piece of magnesium drops from the magnesium electrode plate, so at that time it falls to the bottom of the tank A or mixes in water. This can be prevented.

The circuit CONT for applying a voltage for electrolyzing the wash water has an electrolysis control section 20 as shown in FIG.
0, to which the operation panel PA is connected. Details of the electrolysis control unit 200 are shown in FIG. In FIG. 5, reference numeral 22 denotes an operation panel P connected to the control unit 200.
It is an electrolysis ON / OFF duty adjustment unit on A.
Although not shown, on the operation panel PA, in addition to this, an on / off switch of a power source, an output voltage adjusting section for adjusting an output voltage according to the conductivity of washing water to be used, a frequency of use of a toilet bowl, etc. It also includes a current limit value adjusting unit for adjusting the electrolysis reaction rate of the washing water.

In the control unit 200 shown in FIG.
Is a portion connected to an AC power source by a plug PL (see FIG. 1), 202 is a transformer that transforms the supplied AC voltage into a predetermined voltage, and 203 is a rectifier circuit. Reference numeral 20 is an electrolysis ON / OFF control signal generation circuit. Reference numeral 21 denotes a polarity control signal generating circuit, which has a duty ratio of 1/2 at a predetermined cycle.
The pulse signal is output and the polarity of the electrodes 1 and 2 is switched alternately. The period may be several minutes, and is set to 2 minutes in this embodiment.

Further, Tr1, Tr2, ... Tr
9, Tr10 are transistors, LM is a voltage variable type three-terminal regulator, C1 is a smoothing capacitor, C2, C
Reference numerals 3 and C4 are capacitors for stabilizing operation. R1, R
2, ... R7 and R8 are resistors having a constant resistance value. Each Transis will be explained further later. V
R1 is a variable resistor for adjusting the current limit value, and constitutes a current limiting circuit together with the transistor Tr1. The transistor Tr2 is a power transistor for current boosting, and its collector current is Imax = V _BE /
It is limited to (VR1 resistance value) or less. V _BE is the base-emitter saturation voltage of the transistor Tr1. It is possible to adjust the resistance VR1 according to the usage frequency of the toilet (bath B), change the limiting current amount, and adjust the reaction rate of electrolysis of wash water. The setting value of the resistor VR1 is adjusted by the current limit value adjusting unit on the operation panel PA.

VR2 is a variable resistor for adjusting the output voltage, and in other words, it is operated at the maximum value within the current limiting range of the current limiting circuit according to the conductivity of the wash water used. Adjust the output voltage to limit the current. That is, when the conductivity is low, the output voltage is increased, and when the conductivity is high, the output voltage is decreased. Resistance V
The setting value of R2 is adjusted by the output voltage adjusting unit on the operation panel PA.

Transistor Tr3 is electrolysis ON / OF
F switching power transistor, transistor T
r4 is a transistor for controlling the transistor Tr3. When the output voltage from the ON / OFF control signal generation circuit 20 to the transistor Tr4 is “High”, T
r4 is turned on, Tr3 is turned on, and the wash water is electrolyzed. On the other hand, when the output voltage from the ON / OFF control signal generation circuit 20 to the transistor Tr4 is "Low", Tr4 is turned off and Tr3 is turned off.
Set to FF and stop electrolysis of wash water.

The transistors Tr7 to Tr10 are power transistors. Transistors Tr5, Tr
Reference numeral 6 is a transistor for controlling the polarities of the electrodes 1 and 2. When the output from the polarity control signal generation circuit 21 to the transistor Tr5 is "Low", Tr5 is OFF and Tr6 is O.
N, Tr7 and Tr10 are turned on, Tr9 and Tr8 are turned off, and the electrode 1 becomes the anode and the electrode 2 becomes the cathode.

When the output from the polarity control signal generating circuit 21 to the transistor Tr5 is "High", Tr5 is turned on.
N and Tr6 are turned off, Tr7 and Tr10 are OF
When F, Tr9 and Tr8 are turned on, the electrode 1 becomes the cathode and the electrode 2 becomes the anode. In FIG. 5, IC1 is an inverter. According to the flushing device WCL of the toilet B described above,
Cleaning water w is supplied to the tank A from the tap water or the tap water, and the amount of water in the tank is kept constant by a well-known mechanism using a float valve (not shown). In addition, the circuit CONT for applying the electrolysis voltage of the wash water has the plug P
It is connected to an AC power source (not shown) by L. Further, in the operation panel PA, the resistance value of the resistor VR1 in the electrolysis control unit 200 is set in the current limit value adjusting unit according to the usage frequency situation of the toilet (toilet bowl B) and the resistance value of the resistor VR2. Is set in the output voltage adjusting unit according to the conductivity of the wash water used, and
In the N / OFF duty adjustment unit 22, the ON / OFF duty ratio of voltage application within a predetermined time is set so as to obtain a desired water electrolysis reaction rate.

Thus, when the power switch is turned on, the current limit value based on the set value of the resistor VR1, the output voltage based on the set value of the resistor VR2, and the set voltage application are turned on.
Based on the ON / OFF duty ratio, wash water w in tank A
A direct current voltage for water electrolysis is applied to the water, whereby the wash water w is electrolyzed and the redox potential is lowered. The stirrer 10 is also operated.

The valve V is opened at regular intervals by a control device (not shown), and the electrolyzed water in the tank A flows into all the toilet bowls B. Since the urinary stones in the toilet bowl B are removed and washed away by the electrolyzed water, the bad smell from the toilet bowl B is sufficiently suppressed, the adhesion of the urine stones to the toilet bowl B is sufficiently suppressed, and the toilet bowl B is kept clean for a long time. If the toilet bowl has a white color or a color close to white, it is kept in that color.

In the water washing device WCL, the pair of electrode plates 1 and 2 for electrolyzing water are both made of zinc.
Since the polarity of the DC voltage applied to the pair of electrode plates is reversed at a predetermined cycle, the deposition of calcium, magnesium, etc. per unit area of the electrode is halved, and the consumption rate of the electrodes 1 and 2 is halved for maintenance. The frequency can be halved.

Further, in the water washing apparatus WCL, the pair of electrode plates 1 and 2 are made of zinc, so that the disadvantage of using magnesium for the electrodes, that is, the magnesium electrode is consumed more than the zinc electrode. Violently
There is no inconvenience that the surface becomes rough and fine particles of magnesium peel off and settle. Also, the water washing device W
In the CL, the electrode plates 1 and 2 are housed in an insulating protective frame 9 that allows water to flow so as not to come into contact with the human body, so that electric shock during maintenance can be prevented and safety is ensured. is there.

Further, in the water washing device WCL, since the electrodes are covered with the filter 11 for preventing the substances separated from the electrode plates 1 and 2 from being mixed in the washing water w, calcium, magnesium, etc. It is possible to prevent the precipitate from mixing in water, and to prevent the zinc compound from mixing into the waste liquid as much as possible. Also, the water washing device WCL
In order to increase the efficiency of the electrolysis reaction of the wash water w, the stirrer 10 for stirring the wash water to be electrolyzed is used.
Since it is provided, it is possible to facilitate the separation of hydrogen gas from the cathode and the separation of hydroxide from the anode by operating this, and to make the ion concentration uniform, thereby promoting the electrolysis reaction of water. You can

In the water washing device WCL, an electric circuit CO for applying an electrolysis voltage of the washing water w.
Since NT is provided with a current limiting circuit (Tr1, TR1) that suppresses the current flowing by the electrolysis reaction of water to a predetermined value or less, there is a possibility that an excessive current may flow depending on the usage situation because the conductivity varies depending on the water quality. It is possible to regulate this excessive current even at certain times. Further, since the current regulation value can be changed, the reaction rate of the cleaning water electrolysis can be changed in response to the frequency of use of the toilet bowl depending on the time of day, whereby the consumption of the electrode plates 1, 2 and calcium, magnesium can be changed. It is possible to suppress the precipitation of the like and to suppress the power consumption.

Further, in the water washing device WCL, the ON / OFF duty adjusting section 22 capable of changing the duty ratio of the application and non-application of the electrolysis voltage within a predetermined time.
Since the voltage for water electrolysis can be applied intermittently and the ON / OFF duty can be changed, the electrolysis reaction rate of the washing water can be adjusted in this respect as well. Is.

The present invention is not limited to the above embodiment, but can be carried out in various modes. For example, although the electrodes 1 and 2 are made of zinc in the above-mentioned embodiment, they may be made of magnesium. A pump may be used for stirring the water. The ON / OFF duty is the valve V
It may be possible to adjust that electrolysis is performed for a certain period of time after detecting the decrease in the water level by the float by utilizing the fact that it opens every predetermined time, and after detecting the decrease in the water level or the increase in the water level.

Further, in the above-mentioned embodiment, the plate-shaped electrode is adopted as the electrode for water electrolysis, but a rod-shaped or comb-shaped electrode may be adopted. FIG. 6 shows an example configured by combining a plurality of rod-shaped electrode members E1 and E2. Since this has a larger surface area per unit weight than a plate-shaped one, a large amount of current flows. Therefore, there is an effect that the electrodes can be made lighter to pass the same current. FIG. 7 shows a comb-shaped 2
The two electrode members E3 and E4 are opposed to each other.
In this case, there is an advantage that the distance between the electrodes is short and the current flows more efficiently.

The operating time of the water washing device may be set by a timer. In this case, the timer operating portion may be provided on the operation panel PA. Further, in the above-described embodiment, the case where the common toilet tank A is shared by a plurality of toilet bowls B is shown, but of course, each toilet bowl may be provided with the flushing device of the present invention including a small flush water storage tank. .

In addition, the electrode terminals 3 and 4 and the energizing cords 5 and 6
Is a waterproof structure, but the electrode terminals 3, 4 and the energizing cord 5,
6 to be above the wash water or the upper rod 8
May be lengthened and hooked on the upper side of the tank A. Further, the flushing device of the present invention is not limited to the toilet bowl in the office building as in the above-mentioned embodiment, but a toilet bowl for general household,
It can be applied to a long groove-shaped toilet bowl that can be used side by side by several men as seen in public toilets, and it can also be used for animal excrement treatment areas such as zoos and laboratory animal breeding rooms. Can also be used for rinsing with water), which is included in the concept of "toilet bowl" in the present invention.

[0045]

As described above, according to the present invention,
It is possible to provide a flushing device for a toilet bowl that can suppress the adhesion of urine stones and offensive odors in the toilet bowl over a long period of time to eliminate the need for cleaning the toilet bowl by regular work or significantly reduce the time. it can.

[Brief description of drawings]

FIG. 1 is a view schematically showing the structure of a flushing device according to an embodiment of the present invention together with a toilet bowl with some components omitted.

FIG. 2 is a perspective view of an electrode plate and a water agitator in the water washing apparatus of FIG.

FIG. 3 is a perspective view showing a state where the electrode plate of FIG. 2 is surrounded by a protective frame.

FIG. 4 is a perspective view showing a state in which a filter is provided on the protection frame of FIG.

FIG. 5 is an electric circuit diagram for applying a voltage for water electrolysis.

FIG. 6 is a perspective view of another example of an electrode.

FIG. 7 is a plan view of still another example of the electrode.

[Explanation of symbols]

 B Toilet bowl WCL Toilet bowl flushing device A Wash water storage tank w Wash water V valve 1, 2 electrode plate 3, 4 electrode terminal 5, 6 energizing cord 7 spacer 8 rod 9 protective frame 10 water stirrer 101 propeller 102 motor 11 filter CONT Washing water electrolysis voltage application circuit 200 Electrolysis control unit PA operation panel PL plug 20 ON / OFF control signal generation circuit 21 Polarity control signal generation circuit 22 ON / OFF duty adjustment unit (Tr1, VR1) Current control circuit Tr1 transistor VR1 Variable resistor for adjusting current limit value VR2 Variable resistor for adjusting output voltage Tr3, Tr4 ON / OFF control transistor Tr5, Tr6 Polarity control transistor for electrodes 1 and 2

Claims (1)

[Claims] 1. A tank for storing toilet flush water connected to a flush toilet, and a pair of electrodes for water electrolysis disposed in water in the tank, to which a voltage for water electrolysis is applied. At least one of the electrodes is made of zinc or magnesium, and the voltage is applied to the electrode made of zinc or magnesium as an anode.