JPH11216471A - Polarity inverter of dc power source - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a polarity inverter which is used for an electrolytic sterilizer for sterilizing city water and supplying the sterilized water as various service waters used as an expected operating device, by which the polarity of the DC power source supplied to the device is automatically inverted, and the operating device is stably operated. SOLUTION: The polarity inverter 1 is composed of an AC-DC conversion part 2 and an inversion part for inverting the polarity of a DC power source to be impressed on electrodes 7 and 8 of the electrolytic sterilizer 5 as an operating device by the timer and relay contained. In this case, the inversion part 3 is formed by one main timer, two subtimers for automatically inverting the polarity of the DC current with a fixed lag time within the set range of the main timer in linkage with the main timer and one relay attached to the respective subtimers and energizing for a specified time in connection with each subtimer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, for example, an electrolytic sterilizer or an ionic water generator for sterilizing tap water by electrolysis utilizing chlorine contained in tap water, as an intended working device, The present invention relates to a polarity reversing device of a DC power supply for automatically reversing the polarity of a DC current supplied to a plus side and a minus side of an electrolytic cell provided in the working device and operating efficiently.

[0002]

2. Description of the Related Art In an electrolytic sterilizing apparatus for sterilizing tap water or the like, a DC power supply is supplied to both electrodes of an electrolytic cell provided with a mesh electrode composed of a cathode and an anode, and passes from the cathode side to the anode side. Generates hypochlorous acid from the chlorine in the tap water by electrolyzing the tap water, sterilizes various bacteria present in the tap water with this hypochlorous acid, and continuously contaminates the bacteria in the treated water obtained. It is to prevent.

[0003] This electrolytic sterilizer is excellent in that it does not require the addition of a bactericide or the like, and exhibits an effective germicidal function without a change in water quality (such as pH) and exhibits a continuous bacteriostatic effect. It is a simple device that can be supplied as bacteriostatic water for use in various devices such as scrubbers, tank water storage, and cooling water.

On the other hand, in the ion water generator, tap water supplied to the electrolytic cell is applied to the cathode and the anode, which are opposed to each other with a diaphragm in the electrolytic cell, to apply a DC voltage to electrolyze the tap water and collect on the cathode side. Water containing a large amount of cations is obtained as alkaline water, and water containing a large amount of anions collected on the anode side is obtained as acidic water.

[0005] In the electrolysis in these electrolytic sterilizers and ion water generators, the + ions such as Ca ions and Mg ions contained in the water adhere to the cathode side as scale as the water is used, and the efficiency of electrolysis gradually decreases. It is known that the polarity of the voltage is automatically reversed by using, for example, a changeover switch or a motor, and the scale attached to the cathode is dissolved to bring the cathode into a normal state.

[0006]

A conventional control mechanism for automatically reversing the polarity of a DC voltage supplied to a working device by using a changeover switch, a motor or the like is extremely complicated because its structure is extremely complicated. Failures are likely to occur, and those using electronic circuits such as microcomputers have many problems to be solved practically, such as being expensive.

According to the present invention, the polarity of the DC voltage in the working device such as the electrolytic sterilizer or the ionized water generator is automatically switched according to a predetermined program which is set in advance, so that the working device is substantially efficiently used. While providing a direct current polarity reversing device that enables good operation,
It is an object of the present invention to provide an inexpensive DC power supply polarity reversing device capable of reversing the polarity of a DC power supply supplied to the working device without using a complicated and expensive motor or cam mechanism.

[0008]

In order to achieve the above object, a polarity reversing device for a DC power supply according to the present invention comprises a timer for determining the polarity of a DC power supply connected to an intended work device and supplying power to the work device. And a reversing function for automatically reversing by controlling the set value of the relay.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a desired working device refers to various devices that require switching of the polarity of a power supply, such as an electrolytic sterilizing device or an ionic water generator.

The DC power supply polarity reversing device of the present invention is provided with a reversing function for reversing the polarity of the power supply applied to the electrodes of the working device by controlling the set values of the timer and the relay, preferably AC. It includes a conversion function for converting a power supply into a DC power supply.

The reversing mechanism for reversing the polarity of the electrode is basically composed of one timer and one relay, and the polarity can be reversed by the timer and the relay. In this case, since there is no time lag at the time of inversion, there is a possibility that the electrodes may be melted. Therefore, it is more preferable that the DC power supply is connected to one main timer and connected to the main timer with a certain time lag within a set range of the main timer. And two relays for automatically inverting the polarities of the sub-timers, and one relay attached to each of the sub-timers and energizing for a predetermined time in relation to each sub-timer.

The main timer performs a general reversal switching within a predetermined time set by the converted DC power supply. Two sub-timers linked to the main timer have a setting range of the main timer. Within one of them, one sub-timer is started and energized without polarity reversal by a relay attached to it at a certain lag time, and after the operation of this sub-timer, the other sub-timer is started and the same constant It is configured so as to conduct electricity by reversing the polarity by a relay attached to this with a lag time.

The lag time set by the two sub-timers is such that during this period the operation of the working device is stopped and a shock (for example, deterioration of the electrode) received by the working device due to instantaneous switching of the polarity is minimized. It is alleviating.

[0014]

The DC power supply electrode reversing device of the present invention operates the reversing function provided in accordance with a predetermined program, thereby easily reversing the polarity of the DC power supply supplied to the working device and stably operating the working device. Is what makes it possible.

[0015]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a polarity reversing device of a DC power supply according to an embodiment of the present invention using an electrolytic sterilizer as an intended working device. As shown in FIG. 1, a polarity reversing device 1 for a DC power supply includes a converter 2 for converting an AC current taken from a plug 4 into a DC.
And an inverting function unit 3 for inverting the DC converted by the converting unit 2 according to a predetermined program.

The AC to DC converter 2 is composed of a semiconductor rectifier or the like which takes in an AC of 100 V and converts it into a 35 V, 0.5 A DC current.

The electrolytic sterilizing apparatus 5 as a working device has a cathode 7 and an anode 8 made of a porous mesh electrode opposed to each other inside a plastic tank body 6.
A DC voltage is applied to the device to electrolyze chlorinated tap water introduced from the line 9, and the treated water is taken out through the line 10. The cathode 7 and the anode 8 are made of a porous material in which the surface of a platinum composite metal is coated with titanium.

When a DC voltage is applied to the cathode 7 and the anode 8 of the electrolytic sterilizing apparatus 5 and the water to be treated flows from the line 9, chlorine ions and water react by electrolysis to generate hypochlorous acid in the water. However, sterilized treated water can be obtained by the disinfecting action of hypochlorous acid, and excellent bacteriostatic activity can be obtained by supplying the obtained treated water as water for use in various devices such as scrubbers, tank water storage, and cooling water. The effect can be exhibited.

In the electrolytic sterilizer 5, since + ions such as Ca ions and Mg ions adhere to the cathode 7 as scales due to continuous use, which causes a reduction in sterilization efficiency.
By switching the polarity, the cathode 7 is switched to the anode, and the anode 8 is switched to the cathode, and the voltage is applied, the scale attached to the cathode 7 is dissolved, and the electrolysis operation can be performed in a normal state.

However, if the concentration of hypochlorous acid due to the reaction between chlorine ions and water excessively increases, the resulting treated water will have an adverse effect on the equipment to which the treated water is supplied. In other words, it is necessary to keep the concentration of residual chlorine in water almost constant at all times. As a countermeasure, it is virtually impossible to adjust the output of the power supply (voltage or current) to be supplied.
In order to stabilize the residual chlorine concentration by temporarily suspending the DC voltage applied to the device for a predetermined time, the polarity of the positive and negative electrodes is reversed.

The polarity reversing device 1 of the DC power supply satisfies such complicated conditions and can operate the electrolytic sterilizing device 5 stably. That is, the inverting function unit 3 of the polarity inverting device 1 of the DC power supply is, as shown in FIG.
Number of Men Lee timer T _1, and, the main timer T ₁ and two sub-timer linked with each T ₂ and T _3, and each one of the relay R _1, R attributable to the each sub timer T ₂ and T ₃ one that is composed of _2, numerals in these timers and relays shows a set value to be selected as the number, 11 denotes a control power supply panel.

These timers and relays operate as follows. As shown in FIG. 3, first, the main timer T
_1, for example, every 30 minutes, changeover switches T ₁ A and T ₁ B
, The changeover switch T ₁ A is turned on for the _first 30 minutes according to this setting, and at the same time, the sub-timer T ₂ is operated.

This sub-timer T ₂ has a role of securing a predetermined lag time, and such a sub-timer T ₂
Of setting the starting time provisionally after 10 minutes, the relay R ₁ is operated after 10 minutes After putting sub timer T _2, during the remaining 20 minutes of the 30 minutes set in the main timer T _1, A voltage is applied to the cathode 7 and the anode 8 to operate the electrolytic sterilizer 5 to perform predetermined electrolytic sterilization.

When this operation is completed, the main timer T ₁
Is activated 30 minutes after the initial set time, and the changeover switch T
₁ B are turned ON, the relay R ₂ is operated in the sub timer T ₃ and actuated after 10 minutes at the same time, the 30 minutes of the main timer T ₁ and the polarity of the supply voltage applied to the cathode 7 and the anode 8 is reversed The electrolytic sterilizer 5 is operated for the remaining 20 minutes. In FIG. 3, the converter for converting AC into DC is not shown.

As shown in FIG. 4, during operation of the relay R ₁ in this operation, the connecting terminal plate 12, a DC power source on the plus (+), a lower minus (-) flows as, operation of the relay R ₂ In, the top is minus (-),
The polarity reversal operation in which the lower portion flows as plus (+) is automatically performed, and the scale due to Ca ions, Mg ions, and the like adhering to the cathode side can be completely prevented.

The relay R for the sub-timer T ₂
Relay R ₂ for ₁ and sub timer T ₃ each 10
The operation of the electrolytic sterilizer 5 is stopped during the delay of 10 minutes, and the operation of the electrolytic sterilization apparatus 5 is stopped during the delay of 10 minutes. By stopping the operation, the concentration of the residual chlorine is stabilized, and at the same time, the electrode is deteriorated due to the sudden reversal of polarity. Is sufficiently prevented and stable operation is possible.

The main timer T ₁ and the sub timers T ₂ and T
₃ can be set in the range of 0.1 second to 330 hours, and the setting of the lag time is preferably at least 15 hours.
Since it can be operated as seconds, it can respond to virtually any state.

FIGS. 5 and 6 show another embodiment of the polarity reversing device of the DC power supply of the present invention connected to the electrolytic sterilizing apparatus. The 100 V AC current supplied from the power supply is 35 V and 0.5 A. It is converted to direct current and automatically reverses the polarity of the electrode to which the voltage is applied according to the intended program to operate the electrolysis sterilizer, but since these schematic systems are the same as in FIG. Omitted.

As shown in FIG. 5, the inverting function unit 21 is composed of one timer T and one relay R attached to the timer T. The timer T has a converted 35V,
It has a function as a so-called flicker timer for inverting the polarity of a direct current of 0.5 A without a lag time in accordance with a set value of a program.

As shown in FIG. 6, when the timer T is connected to, for example, a setting number 1 of minus (−) and a setting number 2 of plus (+), the electrolytic sterilizer 5 is shown via a setting value 5 of the relay R. The upper electrode operates as a minus (-), and the lower electrode operates as a plus (+) through the set value 6 of the relay R.

On the other hand, the timer T is operated to change the setting number 1 of (-) to the setting number 3 of (+), and (+)
Is switched to the setting number 4 of (-), the setting numbers 5 and 6 of the relay R act in the direction of the arrow, and the upper electrode in the figure of the electrolytic sterilizer 5 becomes plus (+), The lower electrode is switched to minus (-) through the set value 6 of the relay R, so that the supply current can be inverted. By setting the timer T to a wider range, the working device such as the electrolytic sterilizer can be used. It can be made to function effectively. In the figure, reference numeral 22 denotes a control power supply panel, and reference numeral 23 denotes a connection terminal plate.

[0032]

The polarity reversing device for a DC power supply according to the present invention comprises:
This is connected to the intended working device and the reversing function provided is operated in accordance with a predetermined program to automatically reverse the polarity of the DC power applied to the electrodes of the working device. The stable operation can be achieved.

In particular, the polarity reversing device of the DC power supply of the present invention is applied to an electrode of an electrolytic cell provided in the electrolytic sterilizing device or the ionic water generator, for example, when the working device is an electrolytic sterilizing device or an ionic water generator. By automatically changing the polarity of the DC power supply, it is possible to prevent electrode damage while preventing the formation of scale attached to the cathode side, enabling stable electrolysis operation, and a motor for polarity reversal. By using a combination of a timer and a relay, inexpensive and reliable reversing operation can be performed without requiring a complicated device such as a cam and a cam mechanism.

[Brief description of the drawings]

FIG. 1 is a schematic system diagram of an electrolytic sterilization apparatus using a DC power supply polarity reversing device of the present invention.

FIG. 2 is a system diagram illustrating an example of an inversion function unit according to the present invention.

FIG. 3 is an explanatory diagram for operating a timer in FIG. 2;

FIG. 4 is an explanatory diagram for operation of the relay in FIG. 2;

FIG. 5 is a system diagram showing another example of the inversion function unit in the present invention.

FIG. 6 is an explanatory diagram showing an operation example of a timer and a relay in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Polarity reversing device of DC power supply 2 Conversion part 3, 21 Reversing function part 5 Electrolytic sterilizer 6 Tank main body 7 Cathode 8 Anode 9 Treated water 10 Treated water 11, 22 Control power supply panel 12, 23 Connection terminal board T ₁ Main timer T _2, T ₃ sub timer R _1, R ₂ relay T timer R relay

Claims (5)

[Claims] 1. A direct-current (DC) power supply having a reversing function for automatically reversing the polarity of a DC power supply connected to an intended working device and energizing the working device by controlling a set value of a timer and a relay. Power supply polarity reversing device. 2. The DC power supply according to claim 1, wherein the inversion function is to automatically invert the polarity of the DC power supply by one timer and one relay attached thereto. Polarity reversing device. 3. The inverting function includes a main timer and two main timers connected to the main timer for automatically reversing the polarity of the DC current with a certain lag time within a setting range of the main timer. A sub-timer,
2. The polarity of a DC power supply according to claim 1, wherein each of said sub-timers is provided with one relay for energizing for a predetermined time in relation to each sub-timer. Reversing device. 4. The working device according to claim 1, wherein the working device is an electrolytic sterilization device including a cathode and an anode, and the polarity is switched by automatically reversing the power supply to the cathode and the anode. The DC power supply polarity inverting device according to any one of claims 1 to 3. 5. The DC power supply polarity reversing device according to claim 1, wherein the current reversing supply device has a conversion function of converting the taken AC power into DC power.