KR20080019984A - Air nozzle type ionizer - Google Patents

Abstract

A nozzle type ionizer is provided to have an efficient ionizing performance and range by forming a plurality of air ejection holes on a nozzle fitting at a predetermined interval and adjusting a balance of a generated ion quantity and an air pressure. A nozzle type ionizer includes an air supply unit(11), a high voltage generation unit(13), a discharge probe(14), a plurality of air ejection holes(21). The air supply unit injects an external air and supplies the external air to a nozzle fitting via a main body. The high voltage generation unit receives a voltage from a power source(12) and generates a high voltage. The discharge probe receives the high voltage from the high voltage generation unit, and ionizes an internal air of the main body by a corona discharge. The air ejection holes are formed on the nozzle fitting at a predetermined interval, and eject an ionized air.

Description

Air nozzle type ionizer

1 is a configuration diagram showing a schematic configuration of a nozzle type static eliminator according to the present invention.

Figure 2 is a perspective view of the nozzle fitting of the nozzle type static eliminator according to the present invention.

3 is a cross-sectional view showing a state of injection of ionized air in a nozzle fitting formed such that the angle between the center of the nozzle fitting and each air injection port is made small;

Fig. 4 is a cross-sectional view showing the injection state of ionized air in the nozzle fitting formed so that the angle between the center of the nozzle fitting and the respective air injection holes becomes large.

5 is a data diagram showing the time of static elimination at the time of elimination by using a conventional nozzle fitting.

Figure 6 is a data diagram showing the time of static elimination when using the nozzle fitting according to the present invention.

** Description of symbols for the main parts of the drawing **

10: device body 11: air supply

12: power supply 13: high voltage generator

14: discharge needle 15: sensor

16: power controller 20: nozzle fitting

21: air nozzle

The present invention relates to an electrostatic eliminating device, and more particularly, to a nozzle type static eliminating device which removes static electricity of a charged object by injecting air ionized by corona discharge through a plurality of air injection holes formed in a nozzle fitting connected to an apparatus body. It is about.

In general, static electricity refers to electricity that is suspended on an object, such as triboelectric electricity. When static objects come into contact with each other, they are generated at the contact surface. Such static electricity can cause many problems and risks in the production process of various products. That is, the filling of static electricity and the charged dust particles in paper, film, fiber, plastic process, etc. can cause production inaccuracy, deterioration of quality and fire.

Static electricity may be removed by grounding, by humidification, by using a charging device, or by using an electrostatic remover. However, the most effective and static electricity can be charged regardless of the shape of the charged object. The method is to use a static eliminator.

In particular, since sensitive electrical products such as semiconductors can be destroyed by small static electricity of about 10 volts, an electrostatic eliminator is absolutely necessary for LCD and PDP production processes that are sensitive to contamination by electrostatic dust.

The static elimination device is charged with an antistatic device using X-rays to extinguish the static electricity of the charged object by using the positive and negative ions generated by irradiating X-rays generated from the X-ray tube to the ambient atmosphere, and the positive and negative ions obtained by generating a high voltage. There is a corona discharge type static elimination device that neutralizes and dissipates static electricity by ions of opposite polarity to the charged object charged to the charged object. Refers to a phenomenon in which molecules in the air are ionized.

Corona discharge type static eliminating device is classified into blower type, air gun type, nozzle type, bar type, etc. according to the static eliminating method. will be.

In general, the nozzle type static eliminating device ionizes the outside air introduced by the air compressor to the main body of the device by corona discharge, and then sends it to the nozzle fitting connected to the main body of the nozzle to inject it through the air injection hole formed in the nozzle fitting. Has a structure to remove static electricity.

However, in the conventional nozzle type static elimination device, since the air injection holes formed in the nozzle fittings are formed one by one at regular intervals, the discharge amount according to the ion generation amount of the injected air does not have an even balance according to the length of the nozzle fittings, so that the efficient static elimination It was not made, there was a problem that the static elimination was made only to the charging object existing within the angle of the ionized air is injected through the air injection port.

In addition, even if there is no charge object around, there is no means to detect static electricity even if there is no need to remove the static electricity, there is a problem that the life of the product is reduced and the consumption of air and power used is increased by unnecessary operation of the antistatic device. .

The present invention was devised to solve the problems of the conventional nozzle type static elimination device, and an effective antistatic performance and range by appropriately balancing the amount of ions generated by forming a plurality of air injection holes in the nozzle fitting at regular intervals and air pressure. An object of the present invention is to provide a nozzle type static eliminating device having a.

In addition, the sensor main body is equipped with a sensor that can detect whether a charged object exists around the static eliminator so that the static eliminator operates only when static elimination is necessary, eliminating air consumption and power consumption, and minimizing discharge needle wear. It is an object of the present invention to provide a nozzle type static eliminating device that can be economically used for a long time.

Nozzle type static eliminator according to the present invention for achieving the above object,

In the nozzle type static eliminator which detachably couples the apparatus main body 10 and the nozzle fitting 20 which remove static electricity by a corona discharge,

A high voltage generator 13 for supplying external air and supplying a voltage from the air supply unit 11 to the nozzle fitting through the inside of the apparatus main body and the power supply 12 to generate a high voltage, and a high voltage from the high voltage generator And a plurality of discharge needles 14 which are applied and ionize air inside the apparatus main body by corona discharge, and an air injection port 21 which is formed in a plurality at regular intervals in the nozzle fitting and injects ionized air.

In addition, the nozzle type static eliminator includes a sensor 15 for detecting the presence or absence of a charging object proximate to the apparatus main body 10 and an electrical power source 12 that is electrically connected to the sensor to turn on / off the power 12 according to a signal transmitted from the sensor. The power supply controller 16 to turn off is mounted.

In addition, two air injection holes are formed at the nozzle fittings at regular intervals, and two air injection holes formed at the same distance from the main body of the apparatus and an angle formed by the center of the nozzle fitting are 60 ° or less, and the diameter of the air injection holes is 1.3 to 1.6mm, it is preferable that the distance between the air injection port is determined by the length of the nozzle fitting.

Hereinafter, the configuration and operation of the nozzle type static eliminator according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram showing a schematic configuration of a nozzle type static eliminator according to the present invention.

As shown in FIG. 1, the nozzle type static eliminator according to the present invention is configured in a form in which the apparatus main body 10 and the nozzle fitting 20 are coupled, and the nozzle fitting is detachably mounted to the head of the apparatus main body by screwing. .

External air flows into the main body of the device from the air supply unit 11 implemented by an air compressor. In addition, the high voltage generator 13 receives a voltage from the power supply 12 to generate a high voltage, and the discharge needle 14 mounted inside the main body of the device receives a high voltage from the high voltage generator and receives a high voltage from the high voltage generator. Ionize the air. The ionized air flows into the nozzle fitting 20 by the air supply unit 11 and is injected to the outside by a plurality of air injection holes 21 formed in the nozzle fitting to remove the static electricity of the charged object.

A sensor 15 is mounted at the front end of the apparatus main body 10 to detect the presence or absence of a charging object proximate to the apparatus main body. As such a sensor, the photosensor which applied light as a medium can be used, It is especially preferable that the light transmission part and the light reception part are integrated.

The case in which the charged object approaches the main body of the device is a case in which the charged objects are continuously passed through the main body of the device by a conveyor belt in an LCD or semiconductor manufacturing process, or a person directly approaches the main body of the charged object to remove static electricity. .

The sensor 15 determines that the charged object is around the apparatus main body when the light emitted from the light transmitting part is reflected by the charging object and the returned light is incident on the light receiving unit. Otherwise, the sensor 15 determines that there is no charged object, The signal is transmitted to the power controller 16 electrically connected to the sensor. The power controller turns on / off the power supply 12 according to the signal received from the sensor.

In consideration of the proper injection pressure of the ionized air, it is most preferable to form two air injection holes 21 at regular intervals in the nozzle fitting 20. Thus, only the case where the air injection holes 21 are formed is described below.

Figure 2 is a perspective view of the nozzle fitting of the nozzle type static eliminator according to the present invention, Figure 3 is a cross-sectional view showing the injection state of the ionized air in the nozzle fitting formed so that the angle between the center of the nozzle fitting and each air injection port is small; 4 is a cross-sectional view showing the injection state of ionized air in the nozzle fitting formed such that the angle between the center of the nozzle fitting and each air injection port becomes large.

In an environment requiring high efficiency of static electricity removal, the two air injection ports 21 are formed as adjacent as necessary so that the area where the ionized air injected from each air injection port 21 overlaps each other is widened. That is, as shown in FIG. 3, the angle θ formed between the center of the nozzle fitting 20 and each air injection port 21 is formed to be small. Then, as the air injected from the two air injection ports overlap, the static elimination performance is improved due to the ion overlap phenomenon.

In an environment where static electricity removal is required in a wide range, the two air inlets 21 are formed as far apart as necessary to allow the ionized air to be injected over a wide area. That is, as shown in FIG. 4, the angle θ formed between the center of the nozzle fitting 20 and each air injection port 21 is increased.

Θ is in the range of 0 to 60 ° in the use environment where the static elimination efficiency is more important than the static elimination range, such as when a fast static elimination is required for a flat product. When it is necessary to simultaneously charge the objects located on the left and right sides of the nozzle fitting so that it becomes 90 °, it is preferable to form so that the above is 180 °.

In addition, the diameter of the air injection port is preferably 1.3 to 1.6mm, particularly preferably formed to 1.5mm. In general, when the diameter of the air nozzle is increased, the amount of injected ions increases, but the pressure of injected air decreases, and when the diameter of the air nozzle decreases, the air pressure increases, but the amount of ions decreases. Therefore, the diameter of the air nozzle should be determined in consideration of the balance between the amount of ions and the air pressure. As a result of several experiments, it was confirmed that the highest static elimination efficiency appeared when the diameter of the air nozzle was formed to the same size.

And it is preferable to use a stainless steel pipe of 100 ~ 500mm as the nozzle fitting, it is preferable that the interval between the air injection port is determined by the length of the nozzle fitting.

As a result of several experiments, when the diameter of the air nozzle is 1.5 mm, the distance between the air nozzles is 20 mm for the nozzle fitting of 100 mm, the distance between the air nozzles is 30 mm for the nozzle fitting of 200 mm, and the nozzle fitting is 300 mm. It was confirmed that the highest antistatic efficiency was obtained when the spacing between the air jets was 40 mm, the spacing between the air jets was 50 mm for the 400 mm nozzle fitting, and the spacing between the air jets was 50 mm for the 500 mm nozzle fitting.

In general, if the distance between the nozzles is too far, if the distance to the charging object is close, there is a dead zone of the injected air, ions do not reach the charging object properly, and the static elimination efficiency is reduced, so that the distance between the injection holes do not exceed 50mm do.

In addition, it was also confirmed that the antistatic effect caused by the change in the distance between the air nozzles according to the specific diameter of the air nozzles and the length of the nozzle fittings was significantly improved than the antistatic effect of the conventional nozzle type static eliminator.

FIG. 5 is a data diagram showing a static elimination time during static elimination using a conventional nozzle fitting, and FIG. 6 is a data diagram showing a static elimination time during elimination using a nozzle fitting according to the present invention.

Figure 5 shows the results of measuring the time taken when using a conventional nozzle fitting of 400mm length formed by the injection holes of 1.2mm diameter each one by 10mm intervals, Figure 6 shows the injection holes of 1.5mm diameter two 50mm intervals The result of measuring the time taken when the static elimination was carried out using the nozzle fitting according to the present invention having a length of 400 mm each formed at an angle of 45 ° is shown. The distance from the charged object was measured while changing to 50 mm, 150 mm, 300 mm, and 500 mm, respectively.

In FIG. 5 and FIG. 6, Air Pressure represents the injection pressure of ionized air injected from the nozzle of the nozzle fitting, Decay Time (Sec.) Represents the static elimination time (seconds), and Pos (+) and Neg (-) fields. The numbers in 을 denote the time when the electrostatic voltage of the charged object drops from ± 1,000V to ± 100V.

5 and 6, it can be seen that the use of the nozzle fitting according to the present invention significantly reduces the static elimination time, which means that the static elimination efficiency increases accordingly.

The nozzle type static eliminator according to the present invention has an effective static elimination performance and range by appropriately balancing the amount of ions generated by forming a plurality of air injection holes in the nozzle fitting at regular intervals and air pressure.

In addition, by adjusting the distance between the air injection port it is possible to be static eliminating in accordance with the conditions required in the use environment.

In addition, the diameter of the air injection hole is specified, and the gap between the air injection holes is formed according to the length of the nozzle fitting, thereby forming a high antistatic effect.

In addition, by attaching a sensor to the main body of the device to detect whether there is a charged object around the static eliminator, if there is no charged object around and there is no need to remove static electricity, the static eliminator does not operate so that air consumption and It eliminates waste of power and minimizes discharge needle wear, resulting in long-term economical use.

Claims (7)

In the nozzle type static eliminator which detachably couples the apparatus main body 10 and the nozzle fitting 20 which remove static electricity by a corona discharge, An air supply unit (11) for injecting external air to supply the nozzle fitting through the inside of the apparatus main body; A high voltage generator 13 receiving a voltage from the power supply 12 to generate a high voltage; A discharge needle (14) receiving a high voltage from the high voltage generator to ionize air inside the apparatus main body by corona discharge; And And a plurality of air injection holes (21) formed in the nozzle fitting at a predetermined interval to inject ionized air. In the nozzle type static eliminator which detachably couples the apparatus main body 10 and the nozzle fitting 20 which remove static electricity by a corona discharge, An air supply unit (11) for injecting external air to supply the nozzle fitting through the inside of the apparatus main body; A high voltage generator 13 receiving a voltage from the power supply 12 to generate a high voltage; A discharge needle (14) receiving a high voltage from the high voltage generator to ionize air inside the apparatus main body by corona discharge; A sensor 15 for detecting the presence or absence of a charging object proximate to the apparatus main body; And And a power controller (16) electrically connected to the sensor to turn on / off the power according to a signal transmitted from the sensor. According to claim 1, The sensor 15 for detecting the presence of the charging object in proximity to the main body and the power controller 16 is electrically connected to the sensor to turn on / off the power in accordance with the signal transmitted by the sensor Nozzle type static eliminator characterized in that the configuration further comprises. The nozzle type static eliminator according to claim 1 or 3, wherein two air injection holes are formed at the nozzle fittings at predetermined intervals. The nozzle type static eliminator according to claim 4, wherein an angle formed by the center of the nozzle fittings and the two air injection holes formed at the same distance from the apparatus main body is 60 ° or less. The nozzle type static eliminator according to claim 4, wherein the air injection hole has a diameter of 1.3 to 1.6 mm. 5. The nozzle type static eliminator according to claim 4, wherein a distance between the air injection holes is determined by a length of the nozzle fitting.

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