JPH0615273A - Power supply device of ionized water producing apparatus - Google Patents

Abstract

PURPOSE:To eliminate inconvenience such as the heat generating measure of a power supply transformer or structural processing for preventing a falling accident, to perform effective pH control by stepless voltage control and to provide a power supply circuit usable in common in all the world by employing a transformer free type switching regulator power supply. CONSTITUTION:An AC power supply is turned ON and a current is rectified by a transformer free power supply part 1 to be outputted to an electrolytic cell 100 as electrolytic voltage with a constant value from a switching regulator part 2. When pH of formed alkali ion water is low, a control part 4 turns Tr1-Trn of a voltage control part 3 ON/OFF to control the number of ladder resistors R3-Rn connected to the bleeder resistor R2 of the switching regulator part and the duty ratio of the PWM control of the switching regulator part is changed to control the electrolytic voltage to the electrolytic cell to adjust pH.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for alkaline ionized water, and more particularly to a power supply device for adjusting a voltage applied to an electrolytic cell by varying a duty ratio by PWM control of a switching regulator.

[0002]

2. Description of the Related Art FIG. 3 is a block diagram of a conventional alkaline ionized water generator. The flow rate of tap water flowing in is detected by a water pressure switch 103 such as an orifice meter, and the control unit 104 applies electrolysis power to the electrolyzer 100 to start electrolysis.

The inflowing water is supplied to the electrolytic cell 100, and the electrolytic action between the electrodes 101 and 102 produces alkaline ionized water and acidic water. The temperature of the generated alkaline ionized water is detected by a water temperature sensor (thermistor) 105,
The pH of the produced alkaline ionized water is detected by the pH sensor 106 in the measuring tank 108.
Since the value decreases, the control unit 104 instructs the voltage adjusting unit 107 to convert the feedback amount into a voltage value and increase the voltage applied to the electrolytic cell 100.

The voltage adjusting unit 107 sets the switching tap on the secondary side of the power transformer 109 to b, for example, according to the instruction voltage value.
To c, the DC voltage applied to the electrolytic cell 100 is increased via the switching rectifier 111 by the relay switch 110. Also, when the flow rate detection value of the water pressure switch 103 increases, the applied voltage must be increased.

When the detection value of the electrolytic current of the current sensor 112 is equal to or lower than the predetermined current equivalent voltage, the electrolytic efficiency of the electrodes 101 and 102 is lowered, so that the control unit 104 causes the polarity conversion unit 11 to operate.
5, the polarity conversion unit 115 switches the relay switches 113 and 114 to switch the electrodes 101 and 1.
A reverse voltage is applied to 02 to wash the steel.

[0006]

However, in the prior art shown in FIG. 3, since the power transformer 109 is used, as a structural problem, the internal heat generation amount becomes large due to the waterproof treatment, and the thermal breaker operates. In addition, since the power transformer 109 itself is heavy, it may be necessary to take measures to prevent an accident when the ion water generator falls.

In operation, the voltage applied to the electrolytic cell 100 is adjusted by switching the relay tap 110 on the secondary side of the power transformer 109 in four stages.
Only rough four-step switching is possible, and effective pH adjustment of the generated ion water corresponding to the detection data may be difficult, so switching the relay 110 ON / OFF required for switching.
Power is consumed even when it is off. In addition, there is a problem that the power supply transformer 109 must be converted for countries where the AC voltage value is different from Japan.

The present invention has been made in view of the above circumstances, and by using a switching regulator of a transformerless power supply system, it is small and lightweight, has a small amount of heat generation, has a simple waterproof structure, and is free from voltage adjustment. It is an object of the present invention to provide a power supply device for an alkaline ionized water generator, which has a power supply circuit that can be commonly used all over the world and can perform effective pH adjustment by various stepless adjustments.

[0009]

In order to achieve the above object, the present invention electrolyzes inflowing water by applying a voltage between electrodes in an electrolytic cell to generate alkaline ionized water and acidic water. In an ionized water generator, a PW is provided from a power supply unit that directly rectifies an AC power supply input and a DC output of the power supply unit.
A switching regulator unit that rectifies the pulse output of a control transistor that is turned on / off by M control and outputs a constant DC voltage applied to the electrolytic cell, and is connected in parallel to the output side bleeder resistor of the switching regulator unit. By changing the n-stage ladder resistance to change the duty ratio of PWM control for turning on / off the control transistor, the output voltage of the switching regulator unit is changed to adjust the applied voltage to the electrolytic cell. And a voltage divider that creates a voltage for other operating parts such as a controller relay from the output of the switching regulator, and a feedback amount from each detection data of the device, It is characterized by comprising a control unit for controlling the voltage applied to the electrolytic cell of the control unit.

[0010]

With the above configuration, the AC input is directly rectified by the transformerless power supply unit and output as a stabilized electrolytic cell applied voltage of a predetermined value from the PWM control type switching regulator unit. When the pH of the alkaline ionized water generated in the electrolyzer is lower than a predetermined value, the control unit is connected in parallel with the bleeder resistance (voltage division resistance) of the switching regulator unit in accordance with the feedback amount, voltage adjustment. PW of the switching regulator unit by reducing the number of ladder resistors (ladder connection resistors) connected
The duty ratio of M control is increased, the output voltage is raised and the electrolysis voltage of the electrolyzer is controlled so that the pH is raised, so that the conventional inconvenience of using the power transformer is completely eliminated, and the application of the electrolyzer is prevented. Since the voltage can be adjusted steplessly to enable effective pH control, it can be used as a power supply device that is not affected by the input AC voltage value.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of a power supply device of an alkaline ionized water generator according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a transformerless power supply unit which directly rectifies an AC input with diodes D1 to D4 and Co. A switching regulator IC 2 has a control transistor 6, a pulse oscillation circuit 7, a pulse smoothing circuit 8, a PWM (pulse width modulation) control circuit 9, and bleeder resistors R1, R2 inside.
The output voltage Vo is output from the terminal A, and the PWM control voltage is the voltage at the B terminal.

Reference numeral 3 is a voltage adjusting section for adjusting the voltage applied to the electrolytic cell 100, which is a ladder resistor R3 which is connected in parallel with R2 which divides and sets the PWM control voltage for selecting the duty ratio of the B terminal of the switching regulator 2. , R4, R
5 to Rn and switching Tr1, Tr2, Tr3
It is composed of Trn. Reference numeral 4 is a control unit that controls the voltage of the voltage control unit 3 and controls the feedback of the entire device.
Reference numeral 5 is a voltage dividing unit for dividing the operating voltage of the control unit 4, the solenoid valve, the relay, and the like. Reference numeral 10 is a relay switch for polarity reversal. The same components as those of the other conventional examples are designated by the same reference numerals, and the description thereof will be omitted.

Next, the operation will be described. AC power supply (A
C100V, 130V, 240V, etc.) is rectified by the transformerless power supply unit 1, DC is input to the switching regulator 2, and the pulse oscillated by the pulse oscillating circuit (multivibrator, etc.) of the switching regulator is used as the base of the control transistor 6. To switch to
The pulse output is smoothed by the smoothing circuit 6, and the DC output Vo is output from the A terminal.

When the output voltage Vo fluctuates, the voltage at the B terminal point divided by the bleeder resistors R1 and R2 is input to the PWM control circuit 9 as the PWM control voltage.
An output appears in the control circuit 9, and the output voltage changes the duty ratio of the oscillation pulse of the pulse oscillation circuit 7 by an amount corresponding to the PWM control voltage. When the duty ratio of the pulse input to the control transistor 6 changes, the DC output Vo from the smoothing circuit 8 has a high voltage value when the ON time of the control transistor 6 is long, that is, when the duty ratio of the input pulse is large, Conversely, when the ON time is short and the duty ratio is small, the output voltage of the smoothing circuit 8 becomes low.
In this way, a predetermined regulated voltage is output from the switching regulator IC2 by the PWM control that changes the duty ratio of the pulse that turns ON / OFF the control transistor 6.

When it is desired to set the output voltage Vo in a variable range from 1.8V to 35V, in the switching regulator IC, the bleeder resistor R2 is usually set to the variable V.
By changing the duty ratio of the pulse as R, a method of obtaining only the stabilized output voltage of a constant value set by the user is performed. This is automatically performed steplessly, but now switching regulator ICs
Assuming that the rated output voltage of 2 is set to 30 VDC, Tr1, Tr2, Tr3 for switches of the voltage adjusting unit 3
~ With Trn OFF, ladder resistors R3, R4, R
The state where 5 to Rn is open with respect to the B terminal is when the maximum duty ratio of the pulse is reached, and the rated output voltage is 30 VDC.
Applies to the output of.

When all the switching transistors Tr1 to Trn are ON, all the ladder resistors R3 to Rn are bleeder resistors R.
2 is connected in parallel, and the pulse by the PWM control voltage of the B terminal has the minimum duty ratio (assuming the minimum value of the output voltage is DC10V), the minimum DC1
It corresponds when 0V is output. Therefore, this maximum output DC30
A stepless voltage output of 2 ⁿ steps is possible for the number n of ladder resistors between V and the minimum output of 10 V.

If there are three ladder resistors R3, R4 and R5, Tr1, Tr2 and Tr3 from the control unit 4 will be used.
The voltage control signal that turns ON / OFF is a 3-bit signal,
From "1,1,1", "1,1,0" to "0,0,0", there are 2 ³ = 8 pieces, and 8 stepless voltage adjustment is possible.

Now, when the flow rate is small from the value of the water pressure sensor 103 which actually detects the flow rate of the inflowing water, when the water temperature detected by the water temperature sensor 105 of the produced alkaline ionized water is high, the pH sensor 106 of the ion electrode When the detected pH is higher than the set value, the control unit 4 reduces Tr1, Tr2, Tr3 in order to lower the electrolysis applied voltage (output voltage Vo of the switching regulator IC2) converted to the electrolytic cell 100 as the feedback amount. For example, the voltage adjustment signal “1,1,0” is sent to
By connecting 4 and R5 in parallel to the bleeder resistor R2, the duty ratio of the switching regulator IC2 is reduced and the output voltage Vo is lowered. On the contrary,
When the flow rate is high, the water temperature is low, and the pH is low, the reverse operation is performed, and the ladder resistance is decreased, the duty ratio of the pulse is increased, and the output voltage Vo is increased to increase the pH.

The electrolytic cell 1 is operated by switching the polarity reversing switch 10 based on the detection data of the current sensor 112 during electrolysis.
The cleaning operation of 00 and the like are operations as in the past.

Compared with the conventional example, since the power transformer is not used, the power source is small and lightweight, and as shown in the mounting explanatory diagram of FIG. Will be easier.

In this embodiment, since the transformerless switching regulator power supply is used, the power supply transformer is not required and any inconvenience of using the transformer is eliminated, and the voltage adjustment for electrolysis is simplified. Since stepless voltage adjustment is made possible, effective pH adjustment is possible, wasteful power consumption such as relay make at voltage switching is reduced, and efficiency of electrolytic electrode is improved compared to the conventional 4-step switching. As a result, the power consumption of the electrolytic electrode is also improved. By increasing the electrolysis efficiency of the electrolysis electrode, the size of the two-electrode electrolyzer 100 can be reduced, or a multi-electrode electrolyzer having two or more electrodes can be used to improve the dispersion of power efficiency and the electrolysis efficiency by PWM control. Is. Further, since a power transformer is not used, even in the case of countries with different AC voltages, it is not necessary to replace the power source and can be used as it is at the conversion position of the plug.

[0022]

As described above, according to the present invention, the AC
A transformerless power supply section that directly rectifies the power supply input, and a switching regulator that rectifies the pulse output of the control transistor that is turned ON / OFF by PWM control from the DC output, and outputs a constant DC voltage to be applied to the electrolytic cell. Section and its output side bleeder resistor are connected in parallel n
Turn on the control transistor by switching the number of ladder resistors
By changing the duty ratio of the PWM control for turning on / off, the output voltage of the switching regulator unit is changed to adjust the applied voltage to the electrolytic cell, and a voltage adjusting unit,
Control that controls the voltage adjustment of the voltage regulator by converting the feedback amount from each detection data of the device and the voltage divider that creates the voltage for other operating parts such as the controller and relay from the output of the switching regulator. Since it has a part, all the inconveniences when using a power transformer are eliminated, effective pH control is possible by stepless voltage adjustment, there is no need to modify the power circuit for each destination country, just changing the plug It has the effect that it can be used in common.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a power supply device of an alkaline ionized water generator according to an embodiment of the present invention.

FIG. 2 is an explanatory view of mounting the device shown in FIG.

FIG. 3 is a configuration diagram of a conventional alkaline ionized water generator.

[Explanation of symbols]

1 Transformerless Power Supply Unit 2 Switching Regulator 3 Voltage Adjusting Unit 4 Control Unit 5 Voltage Dividing Unit 6 Control Transistor 7 Pulse Oscillation Circuit 8 Smoothing Circuit 9 PWM Control Circuit 10 Polarity Inversion Switch R1, R2 Bleeder Resistor R3, R4, R5, Rn Ladder resistance Tr1, Tr2, Tr3, Trn Switch transistor

Claims (1)

[Claims] 1. An ion water generator that electrolyzes inflowing water by applying a voltage between electrodes in an electrolytic cell to generate alkaline ionized water and acidic water, and a power supply unit that directly rectifies an AC power supply input. A switching regulator unit for rectifying a pulse output of a control transistor which is turned on / off by PWM control from a DC output of the power supply unit to output a constant DC voltage applied to the electrolytic cell; PW for switching on / off the control transistor by switching n-stage ladder resistors connected in parallel to the output side bleeder resistor of the regulator unit
By changing the duty ratio of M control, the output voltage of the switching regulator unit is changed to adjust the voltage applied to the electrolytic cell, and from the output of the switching regulator, the control unit relay, etc. A voltage dividing unit for generating a voltage for another operating unit, and a control unit for converting a feedback amount from each detection data of the device and controlling the voltage applied to the electrolytic cell by the voltage adjusting unit. Power supply device for alkaline ionized water generator.