JP3388533B2 - Negative ion generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a negative ion generator which produces negative ions from the air by corona discharge.

[0002]

2. Description of the Related Art Conventionally, a negative ion generator as shown in FIG. 1 has been known. In this device, the applied AC voltage is boosted by the winding transformer 1 to generate an AC high voltage,
This is passed through a DC blocking capacitor 3 to a diode 7,
It rectifies to the negative side at 9 and smoothes it at the capacitor 11 to generate a DC high voltage of negative potential. Then, by applying this DC high voltage of negative potential to the discharge electrode 13 through the current limiting resistor 12, corona discharge is generated in the vicinity of the discharge electrode 13 and thereby negative ions are generated.

[0003]

By the way, in the negative ion generator having the above structure, when a high DC voltage of negative potential is applied to the discharge electrode 13 from the side of the diodes 7 and 9 and the capacitor 11, the vicinity of the discharge electrode 13 is reached. Negative ions 15 are generated in the negative electrode 15 and a positive charge 1 is generated in the discharge electrode 13 accordingly.
7 is accumulated. However, in the above device, the discharge electrode 13
There is no escape area for the positive charges 17 stored inside. for that reason,
Due to the positive charge 17 accumulated in the discharge electrode 13, the DC high voltage of the negative potential applied to the discharge electrode 15 from the diode 7, 9 and capacitor 11 side apparently decreases, and the negative ion 15 correspondingly decreases. There was a problem that the amount of occurrence of was reduced.

Therefore, an object of the present invention is to provide a negative ion generator capable of preventing a decrease in the amount of negative ion generation.

[0005]

A negative ion generator according to a first aspect of the present invention generates negative ions by corona discharge from a discharge electrode, and applies a high voltage of negative potential to the discharge electrode. At this time, the current limiting resistor for discharging the positive charge is discharged to discharge the positive charge accumulated in the discharge electrode.
A drainage circuit having a resistance .

According to the above structure, an electric charge for discharging the positive charge is generated.
Since the positive charge accumulated in the discharge electrode can be discharged by the discharge circuit having the flow limiting resistance, the high voltage of the negative potential applied to the discharge electrode is apparently reduced, and the negative voltage is reduced by the reduced amount. It is possible to prevent a problem that the amount of generated ions is reduced and to ensure safety.

[0007]

The negative ion generator according to the second aspect of the present invention generates negative ions by corona discharge from the discharge electrode, and when a high negative voltage is applied to the discharge electrode, the negative electrode is applied to the discharge electrode. By discharging by the voltage of the accumulated positive charge to discharge the accumulated positive charge,
A discharge circuit having a discharge lamp for discharging the positive charge is provided.

[0009]

[0010]

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram showing the overall configuration of the negative ion generator according to the first embodiment of the present invention.

As shown in the figure, the above-mentioned device includes a high voltage generating circuit 21, a discharge electrode 35, and a positive charge discharging circuit 37.

The discharge electrode 35 is for generating a corona discharge by a high DC voltage having a negative potential applied from the high voltage generating circuit 21, and generating the negative ions 43 by the corona discharge and discharging it into the air. , Are connected to the high voltage generation circuit 21. The discharge electrode 35 includes, for example, a needle electrode,
A linear electrode, a blade electrode, or the like is used.

The high voltage generation circuit 21 is for generating a DC high voltage of negative potential by a 100V AC applied from a commercial power source (not shown) and applying it to the discharge electrode 35. Circuit 25
, A piezoelectric transformer 27, diodes 29 and 31, and a smoothing capacitor 33.

The switching power supply 23 receives 100 VAC applied from a commercial power supply (not shown), and generates and outputs a DC voltage that serves as a drive source for the oscillation circuit 25.

The oscillating circuit 25 is driven by a DC voltage applied from the switching power supply 23 as a drive source and oscillates at a predetermined amplitude and a predetermined frequency. The piezoelectric transformer 27 boosts the AC voltage output from the oscillation circuit 25 to generate and output an AC high voltage. The circuit including the diodes 29 and 31 and the smoothing capacitor 33 rectifies and smoothes the AC high voltage from the piezoelectric transformer 27 to the negative side and generates and outputs a DC high voltage of negative potential.

The positive charge discharging circuit 37 includes the discharge electrode 35.
It is for discharging the positive charge 45 accumulated in the discharge electrode 35 from the discharge electrode 35 when a high negative voltage is applied to the discharge electrode 35. The positive charge discharging circuit 37 is a number 10 for safety.
It has a current limiting resistor 39 of MΩ to several hundreds MΩ, and the ground line 4 from the oscillation circuit 25 to the capacitor 33.
7 and the ground side terminal 41 of the switching power supply 23 are connected.

In the above structure, when a high DC voltage of negative potential is applied from the high voltage generating circuit 21 to the discharge electrode 35, corona discharge is generated at the tip of the discharge electrode 35, and the negative ions 43 are generated by this corona discharge. Generated and released into the air. With the generation of the negative ions 43, the discharge electrode 3
5, the positive charge 45 is accumulated, and the positive charge 45 flows into the ground side terminal 41 of the switching power supply 23 through the diodes 31, 29 and the positive charge discharging circuit 37 described above. Therefore, since the positive charge 45 is not accumulated on the discharge electrode 35, a negative DC high voltage applied to the discharge electrode 35 from the diodes 29, 31 and the capacitor 33 side is generated unlike the conventional device. It does not apparently decrease, and there is no problem that the amount of negative ions 43 generated decreases by that amount.

FIG. 3 is data showing the results of a comparison test of the amount of negative ions generated by using the apparatus according to this embodiment shown in FIG. 2 and the conventional apparatus shown in FIG.

In FIG. 3, a curve 51 shows the amount of negative ions produced by operating the apparatus according to the present embodiment, and a curve 53 shows the amount of negative ions produced by operating the conventional apparatus. Are shown respectively. As is clear from the figure, in the device according to the present embodiment, after the operating time of about 1 minute has elapsed after the start-up, the generation amount of negative ions is about 80000.
It is stable at a relatively high level of 0 (pieces / cc).
On the other hand, in the conventional device, the generation amount of negative ions is about 20,000 (piece / c
After reaching the peak of c), about 10,000 (pieces / c
It has remained at a relatively low level of c).

From the above test results, the positive charge 45 generated by the discharge electrode 35 is discharged by the positive charge discharging circuit 37.
It was revealed that the apparatus of FIG. 2 configured to eject from 5 can stably generate a large amount (about 8 times) of negative ions as compared with the conventional apparatus shown in FIG.

In the device shown in FIG. 2, the positive charge discharging circuit 37 is connected to the ground side terminal 41 of the switching power supply 23.
Although it was decided to connect to the ground, it is possible to connect to the ground if it can be grounded.

FIG. 4 is a block diagram showing the overall configuration of a negative ion generator according to the second embodiment of the present invention.

The device according to this embodiment is characterized in that the diode 31 and the smoothing capacitor 33 are removed from the high voltage generation circuit 21 of the device shown in FIG. 2 in order to reduce the number of parts. The configuration of is the same as that of the apparatus of FIG.

That is, the AC high voltage from the piezoelectric transformer 27 is generated into a pulsating high voltage of negative potential through the diode 29, and this pulsating high voltage of negative potential is applied to the discharge electrode 35, whereby the discharge electrode 35. A corona discharge is generated at the tip of the negative electrode 43, and the negative ions 43 are generated by the corona discharge and are discharged into the air. Also in this case, similar to the device in FIG. 2, the positive charge 45 is accumulated in the discharge electrode 35 with the generation of the negative ions 43. This positive charge 45 passes through the diode 29 and the positive charge discharging circuit 37 described above. It flows into the ground side terminal 41 of the switching power supply 23. Therefore, the positive charge 45 is not accumulated in the discharge electrode 35, and the problem that the generation amount of the negative ions 43 is reduced does not occur.

FIG. 5 is a block diagram showing the overall configuration of a negative ion generator according to a modification of the second embodiment of the present invention.

The device according to the present modification is different from the device shown in FIG. 4 in that the positive charge discharging circuit 37 is connected to the switching power supply 23.
It is characterized in that it is connected to the ground, not to the ground side terminal 41. Other configurations are the same as those of the apparatus shown in FIG.

The device according to this modification can also achieve the same effects as the device according to the second embodiment.

FIG. 6 is a block diagram showing the overall configuration of a negative ion generator according to the third embodiment of the present invention.

In the device according to this embodiment, in order to confirm that the negative ions 43 are generated in the vicinity of the tip of the discharge electrode 35, the positive charge discharging circuit 37 of the device shown in FIG.
In addition, the capacitor 55 and the neon lamp 57 are connected to each other, and the other configurations are similar to those of the apparatus of FIG. The capacitor 55 and the neon lamp 57 are connected in parallel.

By the way, the negative ions 43 themselves are colorless and odorless. Therefore, like the above-mentioned devices, the discharge electrode 3
In the case of the negative ion generator equipped with No. 5, as a means for confirming whether or not the apparatus operates normally and the negative ions 43 are generated by corona discharge, a method of measuring with a negative ion measuring instrument or a discharge electrode is used. Only the method of visually confirming the minute discharge at the tip of No. 35 was available. Moreover, in the method of measuring with a negative ion measuring device, it is naturally necessary to install a measuring device separately from the negative ion generator, and with the method of visually confirming the discharge, it cannot be confirmed in a bright room. There were many problems.

Therefore, the inventors of the present invention use the device according to the present embodiment, that is, the capacitor 55 and the neon lamp 57 as a simple circuit capable of surely detecting that the negative ions 43 are discharged by the corona discharge. A parallel body consisting of
This led to the development of a device having a structure connected to the positive charge discharging circuit 37.

In the above structure, the positive charge 4 generated in the discharge electrode 35 due to the corona discharge from the discharge electrode 35.
5 flows backward from the discharge electrode 35 in the high voltage generation circuit 21, and is stored in the capacitor 55. Then, when the voltage across the capacitor 55 reaches the discharge start voltage of the neon lamp 57, the neon lamp 57 starts discharging and emits visible light. Since the same operation is repeated thereafter, the neon lamp 57 repeats the blinking operation when the negative ions 43 are generated. Therefore, if the neon lamp 57 repeats the blinking operation, it can be determined that the negative ions 43 are generated.

Incidentally, the condenser 55 and the neon lamp 57.
It is of course possible to connect the parallel body with and to the positive charge discharging circuit 37 of the apparatus shown in FIGS. Further, it is possible to use another discharge lamp instead of the neon lamp 57.

In order to confirm the performance of this device, the negative ion measuring instrument (ion tester KST900 manufactured by Kobe Denpa Kogyo Co., Ltd.) is used to monitor the negative ion concentration (= whether or not negative ions are emitted) while the neon lamp 57 blinks. confirmed. As a result, the neon lamp 57 repeats the blinking operation when negative ions are being generated, and the neon lamp 5 is not generating negative ions.
7 remained off.

According to the apparatus of this embodiment, not only is it possible to prevent a decrease in the amount of negative ions generated, but also in a bright room without the need to separately install a device such as a negative ion measuring instrument. The generation of the negative ions 43 can be easily confirmed.

The above-mentioned contents are only related to the respective embodiments and modified examples of the present invention, and it goes without saying that the present invention is not limited to the above-mentioned contents.

[0039]

As described above, according to the present invention,
It is possible to provide a negative ion generator capable of preventing a decrease in the amount of negative ion generation.

[Brief description of drawings]

FIG. 1 is a block diagram showing an overall configuration of a negative ion generator according to a conventional technique.

FIG. 2 is a block diagram showing the overall configuration of a negative ion generator according to the first embodiment of the present invention.

3 is data showing comparison test results of negative ion generation amounts by the apparatus of FIG. 2 and the apparatus of FIG.

FIG. 4 is a block diagram showing the overall configuration of a negative ion device according to a second embodiment of the present invention.

FIG. 5 is a circuit configuration diagram of a negative ion device according to a modification of the second embodiment of the present invention.

FIG. 6 is a block diagram showing the overall configuration of a negative ion device according to a third embodiment of the present invention.

[Explanation of symbols]

21 High voltage generation circuit 23 Switching power supply 25 oscillator circuits 27 Piezoelectric transformer 29, 31 diode 33 capacitor 35 discharge electrode 37 Positive charge discharging circuit 39 Current limiting resistor 41 Ground terminal of switching power supply 43 negative ion 45 positive charge 47 High voltage generation circuit ground line 55 Capacitor 57 neon lamp

Continuation of front page (56) Reference JP-A-3-87531 (JP, A) JP-A-4-306596 (JP, A) JP-A-8-217412 (JP, A) (58) Fields investigated (Int .Cl. ⁷ , DB name) H01T 23/00 H01T 19/00

Claims (2)

(57) [Claims] 1. A negative ion generator for generating negative ions by corona discharge from a discharge electrode, for discharging positive charges accumulated in the discharge electrode when a high negative voltage is applied to the discharge electrode. Of positive charge discharge
Negative-ion generator comprising a discharge circuit having a current-limiting resistor for . 2. A negative ion generator for generating negative ions by corona discharge from a discharge electrode, for discharging positive charges accumulated in the discharge electrode when a high negative voltage is applied to the discharge electrode. Accumulated
Discharge the positive charge by discharging with the voltage of the positive charge
And a discharge circuit having a discharge lamp that discharges the negative ions.