JP2006212015A - Electrolyte type water tank pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an long-life oxygen feeder free from vibration and noise as a simple structure having no operation part. <P>SOLUTION: In the electrolyte type water tank pump, a plurality of pairs of electrodes are provided in an alkali electrolytic solution and direct current pulsating current is passed between electrodes to generate a mixed gas of oxygen with hydrogen and the generated gas is discharged from discharge stones having many pores into a water tank or a waste water for rearing fishes to supply oxygen. As a result, the water tank pump solves large defects generating vibration and noise and a defect causing breakage of inlet and discharge valves in a short time in conventional pumps increasing oxygen dissolved in the water tank for rearing aquarium fishes. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to an aquarium pump for releasing an oxygen-containing gas in order to increase oxygen dissolved in an aquarium for breeding appreciation fish, a filtration aquarium, and an aquarium when transporting and transporting live fish.

Conventionally, this type of water tank pump for supplying oxygen has an air pressure generated by a motor or a vibrator, which opens and closes a suction valve and a discharge valve, and discharges air in the water to dissolve oxygen in the air.・ Pumps were mainstream. Such an air pump has a major drawback in that harsh operating noise is generated. Another device that can enrich the residual oxygen in the aquarium is, for example,
Japanese Patent Application Laid-Open No. 7-246039 proposes a “water tank oxygen enricher”. As an oxygen-containing gas generator, Mass gas generator such as “Brown gas mass generator including row type electrolytic cell” of Patent No. 3130014, A gas generator for separating and generating hydrogen and oxygen gas as disclosed in “Water electrolysis / fuel cell device” of Japanese Patent No. 2742893 is known.

However, the conventional air pump method has the disadvantages that it generates vibration and noise, and the suction valve, the discharge valve, and the compressed rubber are easily cracked and cannot be used in a relatively short time. It was. In addition, the apparatus for taking out oxygen alone is inefficient, the apparatus becomes expensive, and is impractical. The present invention solves such a problem, and has a simple structure without an operating part, and discharges a mixed gas of oxygen and hydrogen generated by electrolysis of water into water, and the oxygen in the gas is discharged. It is an apparatus that dissolves in water and saturates residual oxygen in the water tank.

In order to achieve the above object, an invention according to claim 1 is directed to an electrolytic vessel having a water supply port for injecting water and a discharge hole for discharging generated gas, and an electrode provided in the electrolytic vessel. An oxygen-hydrogen mixed gas generator having a power supply for supplying current to the gas, a communication tube for introducing the oxygen-hydrogen mixed gas from the oxygen-hydrogen mixed gas generator into the water tank, and a tip of the communication tube This is because a multi-pore discharge stone for discharging the oxygen-hydrogen mixed gas finely dispersed is provided.

The invention according to claim 2 is that the oxygen-hydrogen mixed gas generator is controlled by providing a DC pulsating current or a DC energization period and an energization stop period.

According to a third aspect of the present invention, in the oxygen-hydrogen mixed gas generator, an overcurrent suppressing means is provided.

According to a fourth aspect of the present invention, in the oxygen-hydrogen mixed gas generator, a plurality of electrode pairs are surrounded by a separation wall and connected in series.

According to a fifth aspect of the present invention, in the oxygen-hydrogen mixed gas generator, a positive and negative electrode pair is provided in an alkaline electrolytic solution made of potassium hydroxide, sodium hydroxide, or calcium hydroxide, and the concentration of the electrolytic aqueous solution 3 to 10%.

The invention described in claim 6 is that a detachable sealing plug is fitted to the water supply port, and a water receiving wall is provided around the sealing plug.

According to the seventh aspect of the present invention, the position of the lower end of the electrode directly connected to the positive or negative terminal of the power supply in the electrolytic vessel is set to a minimum water level set at a predetermined position above the bottom of the electrolytic vessel. It is to have done.

According to the first aspect of the present invention, a mixed gas of oxygen: hydrogen = 1: 2 is generated from an electrolytic container that is an airtight container that electrolyzes alkaline water, and discharged from a discharge hole having multiple pores in a water tank or sewage. Therefore, the concentration of oxygen can be increased to about 1.5 times that in the case of discharging air, and the effect of enriching oxygen in water can be enhanced even with a smaller volume. In addition, there is no mechanical vibration noise, and there is no mechanical wear part, so that a long life can be achieved. In addition, since the generated gas pressure can be easily increased, it becomes easy to make the bubbles extremely small by reducing the pore diameter of the multipores, and the contact surface per volume can be increased. Moreover, since the gas ascending force can be increased by the effect of hydrogen, the jumping action of water droplets on the water surface can be strengthened. This jumping action and the action of increasing the contact area with water can enhance the effect of dissolving oxygen in water. The remaining hydrogen-oxygen gas on the water becomes water vapor by a reduction reaction, adheres to a lid or the like on the water and becomes water droplets, and the effect of increasing the humidity of the room is also obtained.

According to the second aspect of the present invention, an effect of avoiding the problem that the gas generation is stopped due to the electrode being oxidized and the apparent resistance increasing as the continuous use is increased to decrease the energization current can be obtained.

According to the third aspect of the present invention, it is possible to avoid a phenomenon in which a large current flows due to a decrease in apparent resistance due to an increase in the outside air temperature or heat generated by the oxidation reaction of the electrode.

According to the fourth aspect of the present invention, it is possible to reduce the energization current necessary for generating a necessary amount of gas, and to reduce the lead wire diameter to the electrode and facilitate assembly. Direct thyristor control from a commercial power supply becomes easy.

According to the fifth aspect of the present invention, the electrical resistance can be reduced to improve the efficiency, and at the same time, the leakage of alkaline water to the water tank can be prevented.

The invention according to claim 6 can be a safety valve that facilitates the water supply operation and leaks gas when an abnormal pressure is generated.

According to the seventh aspect of the present invention, a water level sensor for avoiding operation at a high concentration and an excessive amount can be made unnecessary.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is an explanatory view showing an embodiment of the electrolytic water tank pump of the present invention. The electrolytic water tank pump 1 has a stainless steel pipe 4 or a stainless rod electrode 3 (positive electrode 3-1, negative electrode 3-2) and a stainless steel wire 4 (positive electrode wire 4-1, rich electrode wire 4-4) in an electrolytic vessel 2. 2) is provided. In the electrolytic vessel 2, an alkaline aqueous solution such as 3% to 10% potassium hydroxide, sodium hydroxide, or calcium hydroxide is placed. A low voltage is generated in the power supply unit 13 by half-wave rectification and applied to the electrode 3 (3-1, 3-2). The oxygen gas generated at the anode 3-1 and the hydrogen gas generated at the cathode 3-2 become a mixed gas of oxygen and hydrogen, pass through the gas discharge hole 7 provided in the upper part of the electrolytic vessel 2, and pass through the communication tube 8. After that, the multi-pore stone 11 having a large number of pores of about 5 μm to 30 μm is released into the water in the water tank 12 and the remaining oxygen in the water is enriched.

In addition, a small hole for replenishing water consumed by electrolysis is provided in the upper part of the electrolytic vessel 2 and sealed with a rubber sealing plug 6, and the outer periphery of the sealing plug 6 and the gas discharge hole 7. Is provided with a water receiving wall 5. When the water reaches the intermediate water level of the container, although not shown in the figure, control to stop naturally is performed. At this time, after removing the sealing plug 6 and the communication tube 8, the water is put into the water receiving wall 5. By pouring, the compressed gas is released from the gas discharge hole 7 and water can be supplied from the small hole to which the sealing plug 6 is attached.

FIG. 2 shows an embodiment showing a control method using a transformer. In this circuit, when a low voltage is supplied to the load 22 by the phase control of the thyristor 21 and the load current increases excessively, the coil of the overcurrent sensor 24 including a reed switch including a permanent magnet and a coil is mainly used. By passing an electric current, a magnetic field is generated by the coil. In the steady state, it is turned on by the magnetic field from the permanent magnet, but in the case of overcurrent, the resistance between the contacts of the reed switch is increased by the magnetic field of the coil, and in the case of a larger overcurrent, it is turned off. . When an overcurrent flows, the output voltage of the comparator 25 is operated from low to high, and the transistor 27 is energized for a certain time by the delay circuit 26. The delay circuit 26 can be replaced with a timer IC. When the transistor 27 is turned on, the peak voltage of the capacitor 20 is lowered, the diac 23 is turned off, the thyristor 21 is stopped, and the generation of bubbles is stopped. By providing such an overcurrent suppressing means, the temperature of the electrolyzed water is lowered and the apparent resistance is increased.

FIG. 3 is a current waveform diagram comparing characteristics of different current changes depending on the control method. FIG. 3A is a diagram in which the capacity of the capacitor 10 in the power supply unit 13 in FIG. 1 is reduced and the maximum value is twice the minimum value. The current waveform when the pulsation is increased as described above. (B) shows the current waveform when the capacitor 10 is removed and half-wave rectification is performed after the voltage is lowered to 2V to 8V by the transformer. In this case, there is an advantage that the electrode structure is simplified, but an increase in space and weight of the transformer is a disadvantage. (C) is a current waveform in the case where AC 100V input is phase-controlled by SCR as in the control circuit shown in FIG. There is an advantage that the circuit space can be made very small and inexpensive. (D) shows the current waveform when full-wave rectification is performed after phase control of the TRIAC. The effect of preventing gas bubbles generated on the electrode surface from stopping on the electrode and forming an oxide insulating film on the electrode surface by flowing the current stopped or pulsated like these current waveforms. Is obtained. It is possible to avoid a decrease in the effective electrode area and a decrease in the current due to the oxide film, that is, a decrease in the generated gas, and the discharge of bubbles from the multi-pore stone 11 is temporarily suspended for a short period of time due to the current stopping or decreasing period. Therefore, the bubbles can be made smaller, and the contact surface between the bubbles and water per the same discharge gas amount is increased, so that the effect of improving the dissolution of oxygen can be obtained.

Fig. 4 (a) is a graph plotting the relationship between the concentration of the alkaline electrolyte and the leakage of alkaline water into the water tank, and the pH values before and after being continuously discharged into a water tank having a width of 35 cm, a depth of 25 cm, and a depth of 20 cm for one week. It is the figure which compared and plotted the change. According to this, it is known that if the electrolytic solution concentration is 10% or less, no leakage is detected and it is safe. (B) shows the result of investigating the relationship between the apparent resistance obtained by dividing the applied voltage between the electrodes by the current and the electrolytic solution concentration. When the electrolytic solution concentration becomes 3% or less, the resistance increases rapidly. Is known. If the apparent resistance is large, the loss increases and the temperature rise increases, and further, the current increases and the power consumption increases. In addition, the electrolytic vessel 2 must be enlarged for the temperature rise. . From the results of FIGS. 4 (a) and 4 (b), it can be seen that the appropriate concentration of the alkaline electrolyte is in the range of 3% to 10%.

FIG. 5 is a front sectional view of an electrolytic container showing another embodiment in which a plurality of pairs of electrode structures in the electrolytic container 2 are separated by a simple partition 14. The first anode 15-1 and the cathode 15-2 are surrounded by the first partition 14-1, and the second anode 16-1 and the cathode 16-2 are connected to the second partition 14-2 by the third partition 14-1. The anode 17-1 and the cathode 17-2 are surrounded by the third partition 14-3, and the fourth anode 18-1 and the cathode 18-2 are surrounded by the fourth partition 14-4. Each of the partition walls 14-1, 14-2, 14-3, and 14-4 is open at the bottom and top, so that the electrolyte solution and the generated gas can freely enter and exit. By setting it as such an electrode structure, the voltage applied between the stainless steel electric wires 4 (4-1, 4-2) can be about 4 times, and an electric current can be reduced to about 1/4. With such a structure, the thyristor phase control angle can be increased and a stable low voltage can be obtained. Further, when the number of electrode pairs is increased, control without a transformer is facilitated, but the structure in the electrolytic tank is complicated and expensive.

FIG. 6 shows another embodiment in which the electrode pairs 28, 29, 30, and 31 in the electrolytic vessel 2 are horizontally placed and shifted in the vertical direction. FIG. 7 is a top view showing the electrode arrangement from above. With such an electrode pair arrangement, the generated gas bubbles remain as white turbid bubbles above the electrodes, but the electrodes are not covered by the bubbles, and the amount of gas generated is reduced by reducing the current. Further, when water is consumed and the electrolytic solution level is lowered to the level A-A ', the energization can be automatically stopped, and there is no need to provide a water level sensor.

A water supply port 37 is opened at the top of the electrolytic vessel 2, and a rubber lid 34 is sealed by a pressure spring 35 and a cap of a pressing lid 36. If the internal gas pressure becomes abnormally high due to clogging of holes in the multi-pore stone, this part functions as a pressure-regulating safety valve. At the same time, it functions as a water supply hole. That is, when the liquid level drops to A-A ', gas generation automatically stops, and the necessity for water replenishment can be recognized. At this time, the communication tube is removed, the presser lid 36 is opened, the pressure spring 35 and the rubber lid 34 are removed, and water can be supplied. The upper limit level of the water supply is such that the container can be visually recognized as a transparent resin.

The stainless steel wire 4 extending from the plus electrode to the first electrode pair 28-1, 28-2, and the stainless steel wire 4 connected between the four electrode pairs 28, 29, 30, 31 separated by the partition wall 14 Is covered with an insulating tube 33 to prevent oxygen and hydrogen gas from coming into contact with the stainless steel wire 4 in the electrolytic solution, causing a short-circuit current to flow due to battery action, thereby reducing gas generation efficiency.

By strengthening the pressure vessel structure of such an oxygen-hydrogen mixed gas generator and increasing the energization current and voltage, the generated gas pressure can be easily increased to a high pressure of several atmospheres or more, sending oxygen into the sewage, It can be used as an aeration apparatus that purifies the water.

It is explanatory drawing which shows one Example of the electrolytic water tank pump of this invention. It is an Example which shows another control method of this invention. Current waveform chart comparing current change characteristics by control method It is a graph which shows the relationship between the liquid leakage with respect to the density | concentration of the alkaline electrolyte used for this invention, and an apparent resistance value. It is electrolytic vessel explanatory drawing which shows 2nd Embodiment in this invention. It is electrolytic vessel explanatory drawing which shows 3rd Embodiment in this invention. It is an upper view which shows the electrode arrangement | positioning in the electrolytic vessel in 3rd Embodiment.

Explanation of symbols

1: Oxygen-hydrogen mixed gas generator 2: Electrolysis vessel 3: Electrode 4: Stainless steel wire 5: Receiving wall 6: Sealing plug 7: Gas discharge hole 8: Communication tube 11: Multi-pore stone 12: Water tank 13: Power supply 14: Partition 15, 16, 17, 18: Electrode pair (vertical type)
28, 29, 30, 31: Electrode pair (horizontal type)
33: Insulating tube 34: Rubber lid 35: Pressure spring 36: Presser lid 37: Water supply port

Claims (7)

An oxygen-hydrogen mixed gas having an electrolytic vessel having a water supply port for injecting water and a discharge hole for discharging generated gas, and a power supply unit for supplying current to an electrode provided in the electrolytic vessel Generator, a communication tube for introducing the oxygen-hydrogen mixed gas from the oxygen-hydrogen mixed gas generating device into the water tank, and a multi-pore discharge stone for finely dispersing and discharging the oxygen-hydrogen mixed gas at the tip of the communication tube An electrolytic water tank pump characterized by comprising: The oxygen-hydrogen mixed gas generator performs pulsating current in which the maximum value of DC is twice or more than the minimum value, or energization control in which a DC energization period and an energization stop period are provided. Item 2. The electrolytic water tank pump according to Item 1. The electrolytic water tank pump according to claim 2, wherein the oxygen-hydrogen mixed gas generator comprises an overcurrent suppressing means. 4. The oxygen-hydrogen mixed gas generating apparatus according to any one of claims 1, 2, and 3, wherein a plurality of electrode pairs are surrounded by a separation wall and connected in series. Electrolytic water tank pump. The oxygen-hydrogen mixed gas generating device is formed by providing positive and negative electrode pairs in an alkaline electrolytic solution made of potassium hydroxide, sodium hydroxide, or calcium hydroxide, and the concentration of the electrolytic aqueous solution is 3% to 10%. The electrolytic water tank pump according to any one of claims 1, 2, 3, and 4, wherein The electrolytic water tank pump according to claim 1, wherein a detachable sealing plug is fitted to the water supply port, and a water receiving wall is provided around the sealing plug. The lower end position of the electrode directly connected to the positive or negative terminal of the power source in the electrolytic vessel is set to a minimum water level set at a predetermined position above the bottom of the electrolytic vessel. Item 2. The electrolytic water tank pump according to Item 1.

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