JPH0745035B2 - Water heater - Google Patents

Description

TECHNICAL FIELD The present invention relates to an improvement of a water heater capable of boiling water internally.

(Prior art and its problems) Conventionally, when boiling water in a water heater, it is boiled at around 80 ° C, which reduces the concentration of dissolved chlorine present in tap water, etc., weakening the bacteriostatic effect. However, when hot water that has been boiled once is not used for a long time and stored in a water heater, various bacteria such as Escherichia coli propagate in the water heater, which is extremely unsanitary.

(Means for Solving the Problems) The present invention has been devised in view of the above-mentioned conventional problems, and an object thereof is to provide no water heater capable of suppressing the propagation of various bacteria and the like. The summary of the
The electrode and the second electrode, and the control device that can apply a continuously changing voltage between the first and second electrodes are configured to be able to sterilize the hot water inside.

In addition, the second gist is that there is 0.7 between the first electrode and the second electrode.
It is provided with a control device that alternately and repeatedly applies a voltage that continuously changes between the voltage of 1.5 V and the voltage of 1.5 V.

(Operation) In the first claim, the water heater has first and second
Since it is equipped with an electrode and a control device that can apply a voltage that continuously changes between the electrodes, a voltage with a strong sterilizing power is continuously applied from the control device to satisfactorily control hot water in the water heater. It can be sterilized. In the second aspect, since the control device alternately and repeatedly applies a voltage that continuously changes between 0.7 V and 1.5 V between the first electrode and the second electrode, each germ is sterilized. The strong voltage is different, but 0.7V ~
A voltage that can sterilize (antibacterial) various germs is included up to 1.5 volts, and if you repeatedly apply these voltages alternately and continuously, various germs can be satisfactorily heated. It can be sterilized inside.

(Example) Hereinafter, the Example of this invention is described based on drawing.

FIG. 1 is a schematic configuration diagram of a hot water storage type water heater. The hot water can be boiled internally by gas or the like, and the hot water W can be stored inside the heat exchanger body 2 made of stainless steel in a cylindrical shape. A combustion chamber 3 is formed, and a plurality of flues vertically installed in the combustion chamber 3 are provided vertically.
3a, 3a, 3a are formed continuously, and the combustion chamber 3 and the flue
Combustion gas rises in 3a, 3a, 3a, and water inside is boiled. A burner 4 is provided in the combustion chamber 3, and a fan 5 is provided in the combustion chamber 3 via a blower pipe 5a. Further, the heat exchanger main body 2 is provided with a water supply port 2a connected to a water pipe or the like for introducing water into the inside thereof, and an outlet for taking out hot water boiled inside to the outside is further provided at an upper portion. A spout 2b is provided.

Further, in this example, the plus electrode 7 made of a carbon rod is arranged so as to be in contact with water inside from the outside of the heat exchanger body 2, and the plus electrode 7 is inserted into the insertion table 6 in an insulated state. It is attached in a shape. Further, a minus electrode 8 is formed in the lower portion of the heat exchanger body 2, and the minus electrode 8 utilizes the stainless steel heat exchanger body 2 itself. The plus electrode 7 and the minus electrode 8 are respectively connected via a cord 9 to a control device 10
It is connected to the.

FIG. 2 shows an example of an electric circuit diagram of the control device 10. In FIG. 2, 11 in the figure is a power source, and in this example, this power source 11 is a voltage source from a household 100 volt power source. It is a lowered DC 7 volt power supply. In the figure, 12 is an inverter, 13 is a frequency divider, and the inverter 12
And the frequency divider 13 repeatedly determine the cycle of the applied voltage. Further, 14 in the figure is an up / down switching device, and 15 in the figure is
A NAND gate, and 16 in the figure is a flip-flop, which is configured so that the switching timing of the minimum voltage E ₂ and the maximum voltage E ₂ + E ₁ of the applied voltage is set by the NAND gate 15, and is increased by the flip-flop 16. The down signal is sent to the up / down switch 14, and the maximum applied voltage E ₂ + E ₁ is controlled. Further, in the figure, 17 is a constant voltage circuit, and the minimum applied voltage E ₂ which is the base voltage is the constant voltage circuit.
It is configured to output at a constant value by 17.

In such a structure, while the hot water is circulating in the water heater 1, there is not much difference in the growth of bacteria inside, but hot water is stored inside for a long time with the hot water from the hot water outlet 2b being stopped. Then, various bacteria such as Escherichia coli and Pseudomonas start to propagate inside. However, in this example, between the plus electrode 7 and the minus electrode 8, a voltage including a voltage having a strong bactericidal activity against various germs that propagate, that is, the minimum voltage E ₂ and the maximum voltage E ₂ + E ₁ 3, the voltage is repeatedly applied in a saw-tooth shape at a cycle t, and in this example, the minimum applied voltage E ₂ is set to 0.7 V and the maximum applied voltage E ₂ + E ₁ is set to 1.5 volts. It is known that a voltage between 0.7 V and 1.5 V has the strongest bactericidal activity against various germs, so that it is set in such a voltage range. For this reason, various bacteria that propagate in the stagnant hot water in the heat exchanger body 2 are controlled by the voltage with a strong bactericidal force that is repeatedly applied, and the proliferation of various bacteria can be suppressed and clean hot water can be maintained. .

In the reserving water heater 1 shown in FIG. 1, a control device for controlling the applied voltage as shown in the time chart of FIG.
It can also be done via 10.

That is, in FIG. 4, a high voltage E _{3 of} about 6 to 7 V can be applied at a predetermined timing to the saw blade-shaped voltage repeatedly applied for bacteriostatic (sterilization). By inserting a high voltage E _{3 of} about 6 to 7 V between the voltage applied to the saw blade for sterilizing the bacteria at a predetermined timing, the anticorrosion effect of the heat exchanger body 2 can be achieved. That is, in the past, the heat exchanger body 2 has always been a problem of anticorrosion, and there is galvanic anticorrosion method as one of the anticorrosion methods. Corrosion protection of the heat exchanger main body 2 is performed, and by performing control according to the time chart as shown in FIG. 4, it is possible to achieve the antibacterial effect of the heat exchanger main body 2 itself as well as the antibacterial effect inside. You can

The material, shape, number and the like of the electrodes 7 and 8 can be appropriately changed, and the voltage to be applied is not limited to the saw blade shape, and may be alternately and repeatedly applied in a sine wave shape.

In this example, the hot water storage type water heater was described, but the same antibacterial structure and anticorrosion method can be applied to the instantaneous water heater, and the burner 4 is an electric type. It may be one.

(Effect of the Invention) The water heater of the present invention includes a first electrode, a second electrode, and a control device that can apply a continuously changing voltage between the first and second electrodes. Since it is configured to be able to sterilize, the control device applies a continuously changing voltage to the hot and cold water stored inside through the first and second electrodes to satisfactorily sterilize the hot and cold water inside (sterilization). It is possible to prevent the propagation of various bacteria and the like, and to have an effect that the hot water can be stored sanitarily.

Further, by providing a control device for alternately and repeatedly applying a voltage that continuously changes between 0.7 V and 1.5 V between the first electrode and the second electrode, the most bactericidal force against various germs can be obtained. The strong voltage range has the effect that a more effective bactericidal (bactericidal) force can be obtained.

[Brief description of drawings]

1 shows an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a hot water storage type water heater, FIG. 2 is an electric circuit diagram of a control device, FIG. 3 is a time chart diagram of an applied voltage by the control device, FIG. 4 is a time chart diagram corresponding to FIG. 3 showing a modified example of the control of the applied voltage. 1 ... Hot water storage type water heater, 2 ... Heat exchanger main body 3 ... Combustion chamber, 4 ... Burner 5 ... Fan, 6 ... Inserting stand 7 ... Positive electrode, 8 ... Negative electrode 10 ... …Control device

Claims (2)

[Claims] 1. A first electrode, a second electrode, and a control device capable of applying a continuously varying voltage between the first and second electrodes, wherein the internal hot water is sterilizable. Become a water heater. 2. The control device according to claim 1, further comprising a control device for alternately and repeatedly applying a voltage continuously varying between 0.7 and 1.5 V between the first electrode and the second electrode. Water heater.