JPH051200U - Static eliminator - Google Patents

Abstract

(57) [Summary] [Purpose] To more completely remove static electricity from the charged sample 7. [Arrangement] An applied voltage that gradually reduces either the pulse width or the pulse height of the voltage applied to each of the anion generation electrode 2 and the cation generation electrode 3 with the passage of time and converges to zero potential. A program sequencer 4 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a static eliminator that removes static electricity from a charged sample.

[0002]

[Prior Art]

 FIG. 3 is a schematic diagram of a static electricity removing device showing an example of the conventional art, and FIG. 4 is a waveform diagram for explaining the operation of the static electricity removing device of FIG. Conventionally, this type of static eliminator has a cation generating electrode 3 and an anion generating electrode 2 protruding from the main body 1, as shown in FIG. 3, and by applying a high voltage to these electrodes, Causes corona discharge and ionizes nitrogen or oxygen in the air. Then, the ionized air was put on the air flow in the room to reach the sample 7 and had the function of removing the static electricity of the sample.

In the sequence of voltage ignition in this static eliminator, as shown in FIG. 4, a pulse voltage having the same waveform shape is applied alternately between plus and minus. Further, the voltage application time of this pulse voltage, the electrode switching time, and the applied voltages 12 and 13 can be set arbitrarily. As described above, in the generation of ionized air by applying a pulse voltage, positive ionized air and negative ionized air 6 are alternately generated, as shown in FIG. Then, the sample 7 was placed on the air flow in the room to reach the sample 7, and the static electricity of the sample 7 was removed.

[0004]

[Problems to be solved by the device]

 In this conventional static eliminator, even if the static elimination of the sample 7 is terminated and the apparatus is stopped, the positive and negative ionized air alternately reaches the sample 7 due to the flow of the air flow. As a result, there is a problem that the sample 7 from which static electricity has been removed once is charged again to plus or minus by the delayed ionized air. An object of the present invention is to provide a static eliminator that completely eliminates static electricity in order to solve such a problem.

[0005]

[Means for Solving the Problems]

 The static eliminator of the present invention comprises an anion generating electrode for generating anions, a cation generating electrode for generating cations, and a pulsed voltage applied to these electrodes, which are pulsed with the passage of time. And an applied voltage program sequencer for gradually reducing the width and pulse height to converge to zero potential.

[0006]

【Example】

 Next, the present invention will be described with reference to the drawings.

FIG. 1 is a schematic diagram of an electrostatic eliminator showing an embodiment of the present invention, and FIGS. 2A and 2B are waveform diagrams for explaining the operation of the electrostatic eliminator of FIG. This static eliminator 1 reduces the pulse width or pulse height of a pulsed voltage alternately applied to each of the cation generating electrode 3 and the anion generating electrode 2 with the passage of time. , An applied voltage program sequencer 4 that converges to zero is provided. Other than that, it is the same as the conventional example.

Next, the operation of this static eliminator will be described. First, as shown in FIG. 2A, the pulse width of the voltage applied to each electrode is gradually reduced. As a result, as shown in FIG. 1, the size of the ionized air in the plasma discharge gradually decreases and reaches the sample 7 in this state. In the sample 7, the electrified electricity is alternately neutralized and concentrated at zero potential.

The same effect can be obtained by reducing the pulse height of the voltage applied to each electrode, as shown in FIG. 2B. The point is to gradually reduce the amount of generated ions.

[0010]

[Effect of the device]

 As described above, according to the present invention, the pulsed applied voltage applied to the cation generating electrode and the anion generating electrode is reduced to either zero in the pulse width and the pulse height with the passage of time, and the applied voltage is reduced to zero. By providing an applied voltage program sequencer that converges to a potential, there is an effect that a static electricity eliminator capable of completely eliminating static electricity of a charged sample can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic view of an electrostatic eliminator according to an embodiment of the present invention.

FIG. 2 is a waveform diagram for explaining the operation of the static eliminator of FIG.

FIG. 3 is a schematic diagram of a static electricity removing device showing an example of the related art.

FIG. 4 is a waveform diagram for explaining the operation of the static eliminator of FIG.

[Explanation of symbols]

 1 Main body 2 Anion generating electrode 3 Positive ion generating electrode 4 Applied voltage program sequencer

Claims (1)

[Claims for utility model registration] [Claim 1] An anion generating electrode for generating anions, a cation generating electrode for generating cations, and a pulsed voltage applied to these electrodes over time. And an applied voltage program sequencer for gradually reducing its pulse width and pulse height to converge to zero potential.