KR20080071123A - Dc ionizer - Google Patents

Abstract

[PROBLEMS] To provide a DC ionizer capable of maintaining a constant amount of ions produced for a long period of time. [MEANS FOR SOLVING PROBLEMS] A DC ionizer which blows ionized air containing positive and negative ions toward an object to be neutralized by means of a fan. The DC ionizer comprises an ion balance sensor (14) for detecting the ion balance of the positive and negative ions, an amount-of-ions sensor (15) for detecting the amount of negative ions, and control means for controlling the negative voltage applied to a negative electrode (12N) according to the output signal from the amount-of-ions sensor (15) to control the amount of negative ions so as to be approximately constant and controlling the voltage applied to a positive electrode (12P) according to the output signal from the ion balance sensor (14) to control the ion balance of the positive and negative ions so as to keep the balance.

Description

DC ionizer {DC IONIZER}

The present invention generates positive and negative ions by applying positive and negative DC voltages to the positive electrode and the negative electrode, respectively, and generates ionized air containing these positive and negative ions. The present invention relates to a direct current type ionizer which blows toward the air, and more particularly, to a direct current type ionizer which maintains an ion balance of positive and negative ions with high accuracy and maintains a constant amount of generated ions over a long period of time.

In this type of DC ionizer, if the ion balance of the positive and negative ions supplied to the object is not maintained, the object is charged positively or negatively. Therefore, various methods are provided to maintain the ion balance. It is becoming.

At the same time, dust and dirt adhere to the positive discharge electrode and the negative discharge electrode due to long-term use, and the amount of generated ions gradually decreases to reduce the static elimination performance. Therefore, improvements are made to suppress the deterioration of the static elimination performance. have.

For example, Patent Document 1, which will be described later, discloses a discharge current / voltage which detects a discharge current on either side of a positive or negative discharge electrode and feedback-controls the high voltage generation circuit at one pole so that the discharge current is constant. A control means is provided and the ion current is detected by the ion detector on the discharge electrode side of the other pole, and the high voltage generation circuit of the other pole is fed back so that the positive ion current and the negative ion current are balanced. The control apparatus of the direct current eliminator provided with the ion current / voltage control means, and the control method using this control apparatus are described.

In addition, Patent Literature 2 arranges a positive ion detection electrode and a negative ion detection electrode in correspondence with a positive discharge electrode and a negative discharge electrode, respectively, and the ion current detected by each detection electrode is the same as the initial setting, and the charging plate is also the same. After the sensitivity is adjusted so that the potential of is 0 (zero), the ion balance is maintained by controlling the applied voltage of positive polarity, negative polarity, or both polarities according to the set voltage of the ion balance variable volume to maintain the ion balance, When a positive ion amount or a negative ion amount decreases by this, the control method of the direct current eliminator which controls the applied voltage so that it may supplement by the reduced amount is described.

Patent Document 1: Japanese Patent Application Laid-Open No. 2003-68497 ([0027] to [0039], FIGS. 6 to 8, etc.)

Patent Document 2: Japanese Patent No. 3572541 ([0008] to [0038], FIG. 1, etc.)

However, the above-mentioned prior arts have the following problems, respectively.

In the prior art described in Patent Document 1, it is noted that the discharge current to the same applied voltage decreases due to the contamination of the discharge electrode. For example, the discharge current on the positive electrode side is detected by the discharge current detection resistor. The amount of generated ions is kept constant by feeding back to the constant current control circuit and controlling the voltage applied to the positive electrode so that the discharge current is constant.

However, since the discharge current detected by the discharge current detection resistor is minute and the error is large, it is difficult to keep the amount of generated ions constant by feedback control.

In addition, in the prior art described in Patent Document 2, since the positive ion detection electrode and the negative ion discharge electrode need to be disposed respectively in correspondence with the positive discharge electrode and the negative discharge electrode, many parts are required, and the ion balance control actually occurs. Instead of feeding back the balance of the positive and negative ions, it is based on the voltage applied to each electrode and the set voltage by the ion balance variable volume. Unless otherwise, ion balance control was difficult to perform accurately.

Accordingly, a problem to be solved by the present invention is to provide a direct-current ionizer that maintains the ion generation amount almost constant over a long period of time and enables precise ion balance control.

In order to solve the above problems, the invention according to claim 1 generates positive ions by applying a positive DC voltage to the positive electrode, and generates a negative ion by applying a negative DC voltage to the negative electrode. In the direct current ionizer which blows the ionized air containing these positive ion and negative ion toward the object to be manufactured by a fan,

Ion balance sensor which detects ion balance of positive ion and negative ion,

Ion amount sensor which detects positive ion amount or negative ion amount,

Based on the output signal of this ion amount sensor, the voltage applied to the electrode of the polarity detected by this ion amount sensor is controlled to control the amount of ions of the polarity to be substantially constant, and based on the output signal of the ion balance sensor. And control means for controlling the voltage applied to the electrode of the opposite polarity to the polarity to maintain the ion balance of the positive and negative ions.

In the invention according to claim 2, in order to maintain the ion balance between the positive and negative ions, the negative side electrode is controlled in order to control the positive DC voltage applied to the positive electrode and to keep the amount of ions almost constant. This is to control the negative DC voltage applied to.

The invention according to claim 3, according to claim 1 or 2,

As the ion balance sensor, the ion balance is detected from a current flowing through the protection member by using a conductive protective member disposed in front of the fan.

The invention according to claim 4, according to any one of claims 1 to 3,

The amount of ions is detected from the current flowing through the ion amount sensor.

The invention according to claim 5, according to any one of claims 1 to 4,

Based on the output of the ion amount sensor, cleaning display for prompting the cleaning of the electrode is performed.

The invention according to claim 6, according to any one of claims 1 to 4,

Based on the voltage applied to the electrode, a cleaning display for prompting the cleaning of the electrode is performed.

In the invention according to claim 7, the alarm display is performed when the cleaning display is continued for a predetermined time or more.

[Effects of the Invention]

According to the present invention, even when the amount of generated ions is reduced due to the contamination of the electrode, the voltage of either positive or negative is controlled in accordance with the output signal of the ion amount sensor, and at the same time, the voltage of the other according to the output signal of the ion balance sensor. By controlling this, the ion balance of positive ions and negative ions can be maintained while keeping the amount of ion generation substantially constant.

In particular, an amount of ion sensor is detected as compared to a method of controlling the amount of generated ions by detecting a discharge current as in Patent Document 1, or controlling the ion balance based on the set voltage by the applied voltage and volume to each electrode as in Patent Document 2. The ion amount control and the ion balance control can be performed more precisely by feedback control using the ion amount directly detected by the ion balance and the ion balance detected directly by the ion balance sensor.

In addition to the cleaning display for prompting the cleaning of the electrode, when the cleaning is not performed even after a certain time, an alarm is displayed to strongly remind the user of the necessity of cleaning.

1 is a block diagram showing an embodiment of the present invention.

[Description of the code]

10: DC ionizer main body 11: casing

12P: positive side electrode 12N: negative side electrode

13: fan 14: ion balance sensor

15: Ion amount sensor 21P, 21N: amplifier

22: CPU 23: voltage regulation circuit

24P, 24N: high voltage generation circuit 25: display control circuit

26a, 26b: indicator lamp

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

First, Figure 1 is a block diagram showing an embodiment of the present invention. In Fig. 1, reference numeral 10 denotes a direct-current ionizer main body. Needle-shaped positive electrode 12P and negative electrode 12N are disposed inside the casing 11, and inside the casing 11 in front. The fan 13 for blowing is arrange | positioned. In addition, a plurality of positive and negative electrodes may be used.

The ion balance sensor 14 is arrange | positioned in front of the fan 13, and the ion quantity sensor 15 is arrange | positioned in the position corresponding to the negative electrode 12N of the front of the fan 13, respectively.

Here, the ion balance sensor 14 is a sensor which detects an ion balance by measuring the ion current according to the amount of positive ion amount and negative ion amount a little, for example, the electroconductive protective member (guard guard arrange | positioned in front of the fan 13). Electrode) can be used. The ion amount sensor 15 is a sensor that detects ion currents caused by negative ions sent out from the periphery of the negative electrode 12N through the fan 13, and converts the ion currents into voltages and outputs them. It is composed by.

The output signal of the ion balance sensor 14 is input to the amplifier 21P in order to control the voltage applied to the positive side electrode 12P, and the output signal of the ion quantity sensor 15 is directed to the negative side electrode 12N. Is input to the amplifier 21N to control the voltage applied thereto.

The output signals of these two amplifiers 21P and 21N are input to the CPU 22, and the output signals are supplied to the high voltage generating circuit 24P and the negative electrode on the positive electrode 12P side via the voltage adjusting circuit 23. It is input to the high voltage generating circuit 24N on the (12N) side, respectively. The positive high voltage output from the high voltage generation circuit 24P is applied to the positive side electrode 12P, and the negative high voltage output from the high voltage generation circuit 24N is applied to the negative side electrode 12N.

In addition, a display control circuit 25 is connected to the CPU 22, and the display control circuit 25 has a display lamp 26a indicating lighting to prompt cleaning of the electrodes 12P and 12N, and a cleaning. The display lamp 26b which lights up and displays an alarm is connected when this is not completed (in the case where the display lamp 26a is displayed more than a fixed period of time).

In the above-described configuration, components other than the ionizer main body 10 constitute a controller, and the components of the controller are incorporated in the casing 11. In addition, the amplifiers 21P and 21N, the CPU 22, the voltage adjusting circuit 23 and the high voltage generating circuits 24P and 24N constitute control means in the claims.

Next, the operation of the present embodiment will be described.

In this embodiment, the CPU 22 detects the ion balance of the positive and negative ions from the output signal of the ion balance sensor 14, calculates the positive voltage applied to the positive side electrode 12P, and calculates the voltage adjusting circuit ( 23). In the voltage adjusting circuit 23, a control signal for generating the output voltage calculated by the CPU 22 is generated and output to the high voltage generating circuit 24P.

On the other hand, the CPU 22 detects the negative ion amount from the output signal of the ion amount sensor 15, calculates the negative voltage applied to the negative electrode 12N, and outputs the negative voltage to the voltage adjusting circuit 23. In the voltage adjusting circuit 23, a control signal for generating the output voltage calculated by the CPU 22 is generated and output to the high voltage generating circuit 24N.

Now, if the amounts of positive and negative ions are not balanced, the ion balance sensor 14 detects an excessive or insufficient amount of positive ions, and the detection signal is input to the CPU 22 through the amplifier 21P. The CPU 22 calculates the necessary plus voltage to be applied to the plus side electrode 12P in order to reduce excess plus ions or to compensate for the insufficient plus ions, and calculates the voltage adjusting circuit 23 and the high voltage generating circuit ( The voltage applied to the positive side electrode 12P is controlled via 24P).

By the above-described operation, the static elimination operation can be performed in a state in which the positive ion amount and the negative ion amount are substantially the same and the ion balance is maintained.

In addition, the electrodes 12P and 12N become dirty due to prolonged use, and as a result, when the amount of generated ions decreases, the amount of negative ions detected by the ion amount sensor 15 also decreases. The output signal of this ion amount sensor 15 is input to the CPU 22 via the amplifier 21N.

In the CPU 22, the required negative voltage to be applied to the negative side electrode 12N to increase the reduced negative ions is calculated, and the negative side electrode 12N is passed through the voltage adjusting circuit 23 and the high voltage generating circuit 24N. Increase the applied voltage to). As a result, when the ion balance is broken, the voltage applied to the positive electrode 12P is controlled by the control system using the ion balance sensor 14 described above, thereby maintaining the ion balance.

In the above description, the voltage applied to the positive electrode 12P is controlled based on the output signal of the ion balance sensor 14, and the negative electrode 12N is controlled based on the output signal of the ion quantity sensor 15. Although the applied voltage is controlled, the applied voltage to the negative side electrode 12N is controlled based on the output signal of the ion balance sensor 14, and the positive side electrode 12P is based on the output signal of the ion quantity sensor 15. It may be configured to control the applied voltage to the.

When the decrease in the amount of negative ions is detected by the ion amount sensor 15, the CPU 22 determines that the electrode needs to be cleaned when the detected amount of ions is smaller than the preset value, and the display control circuit 25 One display lamp 26a is turned on and displayed.

The cleaning display lamp 26a may be displayed when the voltage applied to the negative side electrode 24N or the positive side electrode 24 controlled by the CPU 22 is larger than the set value.

When the cleaning display lamp 26a is continuously lit for a certain period of time, i.e., when the electrode is not cleaned and the amount of generated ions is still small, the other display lamp 26b is turned on through the display control circuit 25. It lights up and acts as an alarm. In this case, the display lamp 26a for cleaning may be displayed in yellow and the display lamp 26b for alarm lighting up in red.

As described above, when the lighting display is performed in two stages, the necessity of cleaning the electrode can be strongly reminded to the user.

According to the present invention, even when the amount of generated ions is reduced due to the contamination of the electrode, the voltage of either positive or negative is controlled in accordance with the output signal of the ion amount sensor, and at the same time, the voltage of the other according to the output signal of the ion balance sensor. By controlling this, the ion balance of positive ions and negative ions can be maintained while keeping the amount of ion generation substantially constant.

Claims (7)

Positive DC voltage is applied to the positive electrode to generate positive ions, and negative DC voltage is applied to the negative electrode to generate negative ions, and ionized air containing these positive ions and negative ions is generated by a fan. In the direct current ionizer which blows toward an object to be fed, Ion balance sensor which detects ion balance of positive ion and negative ion, Ion amount sensor which detects positive ion amount or negative ion amount, Based on the output signal of the ion amount sensor, the voltage applied to the electrode of the polarity detected by the ion amount sensor is controlled to control the amount of ions of the polarity to be substantially constant, and based on the output signal of the ion balance sensor. And control means for controlling the voltage applied to the electrode of the opposite polarity to maintain the ion balance of the positive and negative ions. DC ionizer comprising a. The method of claim 1, DC type which controls the positive DC voltage applied to the positive electrode in order to maintain the ion balance between positive and negative ions, and controls the negative DC voltage applied to the negative electrode in order to keep the amount of ions almost constant. Ionizer. The method according to claim 1 or 2, A direct current ionizer which detects an ion balance from the electric current which flows into the said protection member using the electroconductive protection member arrange | positioned in front of the said fan as said ion balance sensor. The method according to any one of claims 1 to 3, A direct current ionizer which detects an ion quantity from the electric current which flows into the said ion quantity sensor. The method according to any one of claims 1 to 4, A direct current ionizer for performing a cleaning display for prompting the cleaning of the electrode based on the output of the ion amount sensor. The method according to any one of claims 1 to 4, A direct current ionizer for performing a cleaning display for prompting the cleaning of the electrode based on the voltage applied to the electrode. The method according to claim 5 or 6, A direct current ionizer for performing an alarm display when the cleaning indication is continued for a predetermined time or more.

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