JP2000064082A - Power source circuit of hypochlorite forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce cost and to lower failure rate. SOLUTION: This power source circuit is provided with a power source transformer 71, a tap changing circuit 72 for changing the ratio of the number of turns of a primary winding 711 of the transformer 71 to that of the secondary winding 712, a current sensor 74 to detect the load current of the transformer 71 and a control part 75 for controlling the tap changing circuit 72 so that the load current is controlled to a specified value in accordance with the result detected by the current sensor 74. Further, the tap changing circuit 72 is provided with a reference lead-out line T0 of the primary winding 711, plural taps T1, T2, T3 and T4 led out at the different positions of the primary winding 711 and solid-state relays 77, 78, 79 and 80 connected to the taps T1, T2, T3 and T4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply circuit for a hypochlorite generator suitable for use in a sodium hypochlorite generator.

[0002]

2. Description of the Related Art Sodium hypochlorite generator, which is one of the hypochlorite generators, uses sodium chloride (NaCl).
A certain level of electric current is passed between a pair of electrodes immersed in an aqueous solution to carry out electrolysis so that sodium hypochlorite (N
aOCl). In this case, when the concentration or temperature of the sodium chloride aqueous solution changes, the resistance of the aqueous solution changes, so the current value flowing between the electrodes changes when a constant voltage is applied, and the production efficiency of sodium hypochlorite decreases. To do. Further, when an unnecessarily large current flows, the temperature of the power transformer, the rectifier, the electrolytic cell, etc. rises above the specified value.

Therefore, in the conventional sodium hypochlorite generator, a constant current power supply circuit is used so that the current flowing between the electrodes in the aqueous sodium chloride solution is always in a stable state. The acid soda can be efficiently generated, and the temperature of the power transformer and the rectifier is prevented from rising above a specified value. Incidentally, sodium hypochlorite is generally used as a sterilizing and disinfecting agent, a bleaching agent and the like.

[0004]

However, the conventional constant-current power supply circuit is composed of a large number of electric components such as operational amplifiers, power transistors, resistors, etc., and particularly in the sodium hypochlorite generator, Since the value of the current flowing between them is as large as 150 to 200 A, the current stabilizing circuit becomes complicated. Therefore, while the constant current power supply circuit becomes expensive, there is a problem that the failure occurrence rate becomes high because it is composed of many electric parts.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a power supply circuit for a hypochlorite generation device, which can reduce the cost and reduce the failure occurrence rate. To aim.

[0006]

In order to achieve the above-mentioned object, the invention of claim 1 is to provide a large current through a power transformer between a pair of electrodes arranged in an electrolytic cell in the electrolytic cell. In a device for generating hypochlorite, the secondary output current is rectified by taps provided on the primary side of the power transformer at a plurality of winding positions where the secondary output current changes by a predetermined value. A rectification circuit that supplies the pair of electrodes, a current detection unit that detects a rectified current value, and a tap switching control unit that sequentially switches the taps on the side where the detected current value approaches a specified value. It is characterized by having.

According to this structure, when the detected current value is not within the allowable range, the current value is a specified value (for example, 160).
The taps are sequentially switched to the side closer to A), and the current value is controlled so as to be within the allowable range. Therefore, the power supply circuit is configured with a small number of parts, the cost can be reduced, and the failure occurrence rate is reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the determining means determines whether or not the current value exceeds a limit value, and the current value exceeds the limit value. And a stop means for stopping the primary side input.

According to this structure, when the detected current value is not within the allowable range, the taps are sequentially switched to the side where the current value approaches the specified value, and the current value is controlled to be within the allowable range. On the other hand, when the detected current value exceeds the limit value, the primary side input is stopped. For this reason, the power supply circuit is configured with a small number of parts, the cost can be reduced, the failure occurrence rate is low, and the safety is high.

The invention of claim 3 is the same as claim 1 or 2.
The predetermined value is approximately 1 of the specified value.
It is characterized by 0%.

According to this configuration, when the detected current value is not within the allowable range, the taps are switched in order and approximately 10% (for example, 15 A) of the specified value (for example, 15 A).
The current value is adjusted to the side closer to the specified value by A), and the current value is controlled to be within the allowable range. For this reason, the power supply circuit is configured with a small number of parts, the cost can be reduced, and the failure rate is reduced, while the current value is controlled to be surely within the allowable range.

[0012]

1 is a diagram showing a schematic configuration of a sodium hypochlorite generator to which a power supply circuit of a hypochlorite generator according to an embodiment of the present invention is applied. In this figure, the sodium hypochlorite generator is a salt dissolving tank 1
The apparatus main body 3 and the sodium hypochlorite storage tank 5 are provided. This sodium hypochlorite generator is installed, for example, adjacent to the swimming pool filtration device, measures the residual chlorine amount contained in the pool water sampled from the circulation pipe in the filtration device, and measures the residual chlorine content. When the amount is small, sodium hypochlorite is injected into the circulation pipe. As a result, the swimming pool is constantly sterilized and good hygiene is maintained.

The salt dissolving tank 1 is composed of sodium chloride (NaC
1) While the aqueous solution is stored, this aqueous sodium chloride solution is supplied to the apparatus main body 3 side, and an upper limit level sensor 11 and a lower limit level sensor 12 are provided inside.
As a result, when the sodium chloride aqueous solution reaches the lower limit value, the lower limit alarm lamp lights up, and when the sodium chloride aqueous solution reaches the upper limit value, the upper limit alarm lamp lights up to notify the operator. Therefore, when the lower limit alarm lamp is turned on, the aqueous sodium chloride solution is replenished by the operator to a position in the salt dissolving tank 1 where the upper limit alarm lamp is turned on.

The apparatus body 3 is a water supply tank in which an electrolytic bath 31 for electrolyzing an aqueous sodium chloride solution to produce sodium hypochlorite and a dilution water for diluting the aqueous sodium chloride solution supplied into the electrolytic bath 31 are stored. 32, a salt water pump 33 that feeds the sodium chloride aqueous solution in the salt dissolving tank 1 into the electrolytic bath 31, and a dilution water that feeds the dilution water in the water supply tank 32 into the electrolytic bath 31 at the same time as feeding the sodium chloride aqueous solution. A water pump 34 is provided. As a result, a sodium chloride aqueous solution having a predetermined concentration is continuously supplied from the bottom into the salt dissolving tank 1. The method for producing sodium hypochlorite in the electrolytic bath 31 will be described later.

The sodium hypochlorite storage tank 5 is an electrolytic cell 31.
The stored sodium hypochlorite (aqueous solution) is stored in the inside, and the stored sodium hypochlorite is supplied to the outside. The upper limit level sensor 51, the lower limit level sensor 52 and the alarm level sensor are stored inside. 53 is arranged, and a sodium hypochlorite injection pump 54 is arranged outside. As a result, when the storage amount of sodium hypochlorite reaches the lower limit value, the lower limit alarm lamp lights up to notify the operator, while when it reaches the upper limit value, the upper limit alarm lamp lights up, and the salt water pump 33 and the dilution water pump 34 The driving is stopped and the feeding of the sodium chloride aqueous solution and the diluting water into the electrolytic bath 31 is stopped. Further, when the sodium hypochlorite is reduced to the alarm level position, the driving of the sodium hypochlorite injection pump 54 is disabled.

FIG. 2 is a diagram showing an electric circuit configuration centering on the electrolytic cell 31 in the sodium hypochlorite generator. In this figure, in the electrolytic cell 31, a pair of electrodes 311 and 312 are arranged so as to face each other in a sodium chloride aqueous solution having a predetermined concentration fed from the bottom. Further, between the pair of electrodes 311 and 312, a predetermined large current (for example, 16) from the constant current power supply unit 7 connected to the driving power supply PS is provided.
0A) is supplied.

The constant current power supply section 7 includes a power transformer 71 having a primary winding 711 and a secondary winding 712, a tap switching circuit 72 formed on the primary side, and a rectifying circuit 73 connected to the secondary side. , A current sensor 74 for detecting the load current on the secondary side, and a tap switching circuit 7 according to the detection result of the load current.
2 and a control unit 75 for controlling the control unit 2.

The tap switching circuit 72 includes a primary winding 7 connected to one pole P ₁ of a power source PS (for example, AC200V).
11, a reference lead wire T ₀ , taps T ₁ , T ₂ , T ₃ , T ₄ provided at a plurality of positions in the winding direction of the primary winding 711, and each tap T ₁ , T ₂ , T ₃ , T ₄ Connected to each tap T ₁ ,
It consists T _2, T _3, T ₄ and first to fourth solid state relay (SSR) 77,78,79,80 Metropolitan of a switching means which is interposed between the other pole P ₂ of the power supply PS Has been done.

That is, each SSR 77, 78, 79, 8
One end side of the load side circuit of 0 is connected to the taps T ₁ , T ₂ , T ₃ and T ₄ of the primary winding 711, respectively, and the other end side of the load side circuit is connected to the other pole P ₂ side of the power supply PS. It is like this. Therefore, one of the SSRs 77, 7
By driving 8, 79 and 80, the primary winding 71
The number of turns of 1 is changed so that the primary winding 711 and the secondary winding 712 are changed.
And the turns ratio is changed. As a result, the voltage induced in the secondary winding 712 is changed, and the secondary output current (secondary winding 7
12 will be changed. The induced voltage of the secondary winding 712 has, for example, a specified value of about 4
~ 5V (The secondary output current has a specified value of, for example, about 150V.
The winding ratio is set so as to be A).

For example, when the SSR 78 is driven, the primary winding 711 in this case has the number of windings between the reference lead wire T ₀ and the tap T ₂ . Further, in this embodiment, the secondary output current is changed by, for example, about 15 A each time the taps T ₁ , T ₂ , T ₃ , T _{4 of the} primary winding 711 are switched by one step (one pitch). ing. That is, each time the taps T ₁ , T ₂ , T ₃ , and T ₄ of the primary winding 711 are switched by one pitch, the secondary output current has a specified value (for example,
It is designed to be changed by about 10% of 150 A). In the production process of sodium hypochlorite, the production efficiency is stable even if the current change amount per pitch unit of the tap switching circuit 72 is as rough as about 15 A as described above.

The current sensor 74 is composed of a shunt resistor 741 inserted in the circuit of the secondary winding 712 side. The voltage across the shunt resistor 741 is input to the control unit 75, and the shunt resistor 741 in the control unit 75. The load current value is calculated from the known resistance value and the both-end voltage.

A power transformer 81 is connected to the power source PS, and the salt dissolving tank 1 is provided on the secondary side of the power transformer 81.
The drive circuit 13 for driving the upper limit level sensor 11 and the lower limit level sensor 12 is connected to the drive circuit 55 for driving the upper limit level sensor 51, the lower limit level sensor 52 and the alarm level sensor 53 of the sodium hypochlorite storage tank 5. Has been done. In addition, the signals of the respective sensors are input to the control unit 75 from the respective drive circuits 13 and 55.

A power transformer 82 is connected to the secondary side of the power transformer 81. A fifth SSR 83 whose drive is controlled by the controller 75 is connected to the primary winding 821 of the power transformer 82, while the secondary winding 822 is connected.
A rectifier circuit 84 is connected to the rectifier circuit 84, and a minute current (for example, about 2 A) is supplied from the rectifier circuit 84 between the pair of electrodes 311 and 312 so that the electrolysis of the aqueous sodium chloride solution does not proceed. . This small current is
When the driving of the constant current power supply unit 7 is stopped, the SSR83
Is driven to be supplied between the pair of electrodes 311 and 312,
Corrosion of the electrolytic cell 31 and the electrodes 311 and 312 is prevented.

FIG. 3 is a block diagram for explaining the structure of the control unit 75 centering on the electrolytic cell 31 in the sodium hypochlorite generator. In this figure, the control unit 75
Includes a CPU 751 for performing a predetermined calculation or control process, a ROM 752 in which a predetermined processing program is stored, and a RAM 753 for temporarily storing processing data.

The CPU 751 has a current sensor 74,
Upper limit level sensor 11 and lower limit level sensor 12 for aqueous sodium chloride solution, upper limit level sensor 51, lower limit level sensor 52 and alarm level sensor 5 for sodium hypochlorite
3, and a residual chlorine concentration sensor SE for detecting the residual chlorine concentration of the swimming pool is connected and a predetermined signal is input, while an alarm lamp L ₁ which is an alarm lamp of the salt dissolving tank ₁ and sodium hypochlorite An alarm lamp L ₂ which is an alarm lamp of the storage tank 5, a salt water pump 33, a dilution water pump 34, a sodium hypochlorite injection pump 54, a magnet conductor 76, and the first to fifth SSRs 77, 78, 79, 8
0 and 83 are connected to control each operation.

Further, the CPU 751 has a current value calculation means 754, a current value determination means 755, a residual chlorine concentration determination means 756, a relay drive signal output means 757, a salt water pump drive signal output means 758, and a dilution water pump drive signal output means. 759, alarm lamp drive signal output means 760, 761,
It is provided with each function realizing means of the infusion pump drive signal output means 762 and the magnet conductor drive signal output means 763. The relay drive signal output means 757 is the first to fifth signal output means 763, 764, 765, 7
66,767 each function realization means are provided.

Here, the current value calculating means 754 is set to R in advance.
By dividing the resistance value of the shunt resistor 741 stored in the OM 752 by the voltage value across the electrode 311,
A load current flowing between the lines 312, a current value determination means 755 determines whether the load current calculated by the current value calculation means 754 is within an allowable range stored in the ROM 752 in advance, Residual chlorine concentration determination means 75
Reference numeral 6 determines whether or not the residual chlorine concentration in the swimming pool detected by the residual chlorine concentration sensor SE is within a predetermined range stored in the ROM 752 in advance.

Further, the relay drive signal output means 757 is
First to fifth signal output means 763 to 767 to first
To output the drive signals for driving the input side circuits of the fifth SSRs 77, 78, 79, 80, 83, and the salt water pump drive signal output means 758 outputs the drive signals for driving the salt water pump 33, The dilution water pump drive signal output means 759 outputs a drive signal for driving the dilution water pump 34.

The alarm lamp drive signal output means 760 is also provided.
Is for outputting an alarm lamp drive signal for alarming the upper and lower limits of the aqueous sodium chloride solution in the salt dissolving tank 1, and the alarm lamp drive signal output means 761 is for hypochlorite in the sodium hypochlorite storage tank 5. The one that outputs the drive signal of the alarm lamp that warns the upper limit, the lower limit of the acid soda and the alarm position, and the injection pump drive signal output means 762 outputs the drive signal that drives the injection pump 54 of the sodium hypochlorite storage tank 5. And magnetic conductor drive signal output means 763
Outputs a drive signal for driving the magnet conductor 76.

Next, an example of the overall operation of the sodium hypochlorite production apparatus configured as described above will be outlined. First, the sodium chloride aqueous solution in the salt dissolving tank 1 is continuously fed from the bottom into the electrolysis tank 31 by the salt water pump 33, and the dilution water in the water supply tank 32 is fed into the electrolysis tank 31 by the dilution water pump 34. It is continuously fed.

On the other hand, in the electrolytic cell 31, a pair of electrodes 31
A constant current (for example, 1
(About 60 A), the sodium chloride aqueous solution is electrolyzed to generate sodium hypochlorite.
The generated sodium hypochlorite (aqueous solution) is sequentially discharged from the upper part of the electrolytic bath 31, fed into the sodium hypochlorite storage tank 5, and stored in the sodium hypochlorite storage tank 5. It

In the sodium hypochlorite storage tank 5, when the sodium hypochlorite reaches the position of the upper limit level sensor 51, the driving of the salt water pump 33 and the dilution water pump 34 is stopped, and the salt water pump 33 enters the electrolytic cell 31. While the supply of the aqueous sodium chloride solution is stopped, the magnet conductor 76 is opened to stop the driving of the constant current power supply unit 7 and the generation of sodium hypochlorite in the electrolytic cell 31 is stopped. When the driving of the constant current power supply unit 7 is stopped, the fifth SSR 83 is driven and a minute current is supplied between the pair of electrodes 311 and 312.

On the other hand, the sodium hypochlorite stored in the sodium hypochlorite storage tank 5 is stored in the swimming pool by the injection pump 54 so that the amount of residual chlorine in the swimming pool is maintained within a predetermined range. As a result of being injected into the electrolyzer 3, when the level becomes lower than the upper limit level sensor 51, the magnet conductor 76 is closed to drive the constant current power supply unit 7, and the electrolyzer 3
The production of sodium hypochlorite in 1 is restarted.

When the sodium hypochlorite in the sodium hypochlorite storage tank 5 is reduced to the position of the alarm level sensor 53, the injection pump 54 cannot be driven. Further, when the sodium chloride aqueous solution in the salt dissolving tank 1 is reduced to the position of the lower limit level sensor 12,
The operator replenishes the aqueous sodium chloride solution by turning on the alarm lamp.

Next, the electrodes 311 and 312 in the electrolytic cell 31
The stabilizing operation of the load current flowing between will be described with reference to the flowchart shown in FIG. First, the electrolytic bath 31
The load current flowing between the pair of electrodes 311 and 312 inside is detected by the current sensor 74 (step S1). The current sensor 74 detects the voltage across the shunt resistor 741 as described above, and the current value calculating means 754 is based on the detected voltage across the shunt resistor 741 and the resistance value of the shunt resistor 741.
The load current value is calculated by

Then, it is judged whether or not the calculated load current is within the allowable range (step S3). If the determination is positive, the process returns to step S1 and the subsequent operations are repeatedly executed. When the determination is negative in step S3, it is determined whether the load current is less than the lower limit value of the allowable range (step S5). When this determination is affirmed, the drive of the currently driven SSR (for example, SSR79) is stopped, and the winding ratio of the power transformer 71 (the number of turns of the secondary winding 712 relative to the number of turns of the primary winding 711 is higher than that of the SSR. Ratio)
Is decreased by one step (that is, the direction in which the induced voltage of the secondary winding 712 is increased) (eg, SSR78) is driven (step S7).

As a result, the induced voltage in the secondary winding 712 rises, the load current flowing between the electrodes 311 and 312 increases, and approaches the specified value (for example, 160 A). After that, returning to step S1, the subsequent operation is repeatedly executed, and the load current is adjusted so as to be within the allowable range. The case where the determination is negative in step S3 means, for example, when the concentration of the sodium chloride aqueous solution fed into the electrolytic bath 31 has changed significantly, or the reaction heat due to the change in ambient temperature or the chemical change in the electrolytic solution. This is the case when the temperature of the sodium chloride aqueous solution changes significantly due to the above conditions.

That is, when the supply amount of the sodium chloride aqueous solution into the electrolytic cell 31 increases or the supply amount of the diluting water decreases, the concentration of the sodium chloride aqueous solution in the electrolytic cell 31 increases and the load current increases. When the supply amount of the sodium chloride aqueous solution into the electrolytic cell 31 decreases or the supply amount of the diluting water increases, the concentration of the sodium chloride aqueous solution in the electrolytic cell 31 decreases and the load current increases. Will decrease. In addition, when the ambient temperature rises or the reaction heat is accumulated and the temperature of the aqueous sodium chloride solution in the electrolytic cell 31 rises, the load current increases, the ambient temperature decreases, and the reaction heat is reduced. If the temperature of the aqueous solution of sodium chloride in the electrolytic cell 31 becomes low due to the decrease in load, the load current will decrease.

When the determination in step S5 is negative (that is, when the load current exceeds the upper limit value of the allowable range), it is determined whether or not it is less than the limit value (for example, 200 A) (step S9). When this determination is affirmed, the driving of the SSR currently driven (for example, SSR 79) is stopped, and the winding ratio of the power transformer 71 becomes one step larger than that SSR (that is, the secondary winding 7).
12 SSR of the induced voltage decreases (for example,
The SSR 80) is driven (step S11). As a result, the induced voltage in the secondary winding 712 drops and the electrode 31
The load current flowing between 1 and 312 becomes smaller and approaches the specified value (for example, 160 A). After that, returning to step S1, the subsequent operation is repeatedly executed, and the load current is adjusted so as to be within the allowable range. When the determination is negative in step S9, it is determined that an abnormality has occurred, the magnet conductor 76 is opened, and the driving of the constant current power supply unit 7 is stopped.

In the power supply circuit of the hypochlorite generator in the above embodiment of the present invention, as described above, the taps T ₁ , T ₂ , T ₃ , T ₄ of the tap switching circuit 72 are sequentially switched to load current. Since the value is controlled so as to approach the specified value (for example, 160 A) and the load current is within the allowable range, the number of constituent parts of the power supply circuit can be reduced and the cost can be reduced. The failure rate can be reduced. The power supply circuit of the hypochlorite generator in the above-described embodiment of the present invention taps because it is not necessary to stabilize the load current with high accuracy in order to maintain the generation efficiency of sodium hypochlorite in a good state. This can be realized by controlling the switching circuit 72.

The power supply circuit of the hypochlorite generator of the present invention is not limited to the configuration of the above-mentioned embodiment, and various modifications as described below can be adopted, for example. .

(1) In the above embodiment, the current sensor 74
The current value is calculated based on the voltage across both ends detected in step S1 and the resistance value of the shunt resistor 741, and it is determined whether or not the calculated current value is within a predetermined range. Instead, it is possible to indirectly determine the current value by determining whether the voltage across the shunt resistor 741 is within a predetermined range. In this way, even when the determination is made by directly using the voltage across the shunt resistor 741,
It is substantially the same as detecting the load current.

(2) In the above embodiment, the power transformer 7
SSR 77, 78, 79, 8 to change the turns ratio of 1
Although 0 is used, the tap switching circuit 7 is replaced by an electromagnet relay, a rotary type switching switch or the like instead of the SSR.
It is also possible to configure 2. It is also possible to configure the tap switching circuit 72 with a primary winding, a brush that slides on the primary winding, and a drive motor such as a stepping motor that can move the brush at a predetermined pitch.

[0044] (3) In the above embodiment, the tap switching circuit 72 is the reference lead line T ₀ is not connected to the switching means such as SSR, also connects the switching means to the reference lead line T _0, the reference The winding ratio of the primary winding 711 and the secondary winding 712 is changed by driving any two switching means of the lead wire T ₀ and the taps T ₁ , T ₂ , T ₃ , T _4. It is also possible to change the secondary output current. That is,
When any two switching means are driven in such a configuration, the primary winding 711 becomes the number of windings between the two driven switching means, and as a result, the primary winding 711 and the secondary winding 7 are wound.
The turns ratio with 12 is changed, and the secondary side output current is changed.

(4) In the above embodiment, the primary winding 711 is
The taps T ₁ , T ₂ , T ₃ and T _{4 of} are drawn from the winding position where the secondary output current can be changed by about 15 A each time one pitch is switched. For example, the secondary output current is a specified value. When it is close to (for example, 150 A), the amount of change in current per pitch is reduced, and when the secondary output current is far from the specified value, the amount of change in current per pitch is increased. The withdrawal positions of the taps T ₁ , T ₂ , T ₃ , T ₄ may be set. Also, tap T
_1, T _2, T _3, the secondary output current T ₄ to each switch 1 pitch advance so as to be changed by a predetermined value, when the secondary output current is close to the specified value switched by one pitch, the secondary When the output current is far from the specified value, it is possible to switch a plurality of pitches at once.

(5) In the above embodiment, the sodium hypochlorite generator to which the power supply circuit of the hypochlorite generator of the present invention is applied is installed in parallel with the circulation device of the swimming pool. However, it is also applicable to various other devices that require sterilization of an object such as water. Further, the power supply circuit of the hypochlorite generator of the present invention can be applied to a hypochlorite generator other than the sodium hypochlorite generator.

[0047]

As described above, according to the first aspect of the present invention, the taps provided at a plurality of winding positions where the secondary output current changes by a predetermined value are sequentially arranged so that the current value approaches the specified value. Since the switching is performed, it is possible to realize the power supply circuit of the hypochlorite generation device that can reduce the cost and reduce the failure rate.

Further, the invention of claim 2 is provided with a stopping means for stopping the primary side input when the current value exceeds the limit value, so that the power source of the hypochlorite generator with high safety is provided. A circuit can be realized.

Further, according to the invention of claim 3, the predetermined value is set to be approximately 10% of the specified value.
It is possible to realize the power supply circuit of the hypochlorite generator in which the current value is surely within the allowable range.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a sodium hypochlorite generation device to which a constant current power supply device according to an embodiment of the present invention is applied.

FIG. 2 is a diagram showing an electric circuit configuration centering on an electrolytic cell of the sodium hypochlorite generator shown in FIG.

FIG. 3 is a block diagram showing a configuration of a control unit centered on an electrolytic cell of the sodium hypochlorite generator shown in FIG.

4 is a flow chart for explaining a stabilizing operation of a load current flowing between a pair of electrodes in an electrolytic cell of the sodium hypochlorite generator shown in FIG.

[Explanation of symbols]

1 Salt Dissolution Tank 3 Device Body 5 Sodium Hypochlorite Storage Tank 7 Constant Current Power Supply Unit (Power Supply Circuit) 31 Electrolytic Tank 71 Power Supply Transformer 72 Tap Switching Circuit 73 Rectifier Circuit 74 Current Sensor (Current Detection Means) 75 Control Unit (Tap) Switching control means) 76 Magnet conductor (stopping means) 77, 78, 79, 80 SSR (tap switching control means) 311, 312 Electrode 711 Primary winding 712 Secondary winding 741 Shunt resistance 755 Current value determination means (determination means) T ₀ reference leader line T ₁ , T ₂ , T ₃ , T ₄ tap

Claims (3)

[Claims] 1. An apparatus for producing hypochlorite in a tank by supplying a large current through a power transformer between a pair of electrodes arranged in an electrolytic cell, wherein a primary side of the power transformer is provided. There are taps provided at a plurality of winding positions where the secondary output current changes by a predetermined value, a rectifier circuit that rectifies the secondary output current and supplies it to the pair of electrodes, and detects the rectified current value. A power supply circuit for a hypochlorite generation device, comprising: a current detection unit for controlling the current and a tap switching control unit for sequentially switching the taps on the side where the detected current value approaches a specified value. 2. The power supply circuit of the hypochlorite generator according to claim 1, wherein the current value exceeds a limit value and a determination unit determines whether the current value exceeds a limit value. 2. A power supply circuit for a hypochlorite generator according to claim 1, further comprising a stop means for stopping the input on the primary side when the power is present. 3. The power supply circuit for a hypochlorite generator according to claim 1, wherein the predetermined value is approximately 10% of the specified value.