JP4391618B2 - Air blow gun type static eliminator - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to a static eliminator, and more particularly, to an air blow gun type static eliminator that functions as both an ionizer and an air blow gun, and simultaneously blows away dust and dirt adhering to static electricity of an object.
[0002]
[Prior art]
Examples of the conventional electrostatic remover (ie, static eliminator) include the following.
(1) Ionizer (a) Equipment that removes static electricity by fixing it to the device (b) Equipment that removes electricity while moving it by hand (c) Air blow gun that blows out compressed air and ionizer A device that blows away dust adhering to static electricity while discharging static electricity (hereinafter simply referred to as an air blow gun type static eliminator).
(2) Wrist strap (3) Antistatic clothing (4) Conductive shoes (5) Passive static eliminator (a) Ring type (b) Watch type
Since the present invention relates to the improvement of the air blow gun type static eliminator (c) in the ionizer among the above static eliminators, a conventional air blow gun type static eliminator will be described below. The description of the other static eliminator described above is described in Japanese Patent Application No. 11-046828 filed on February 24, 1999 by the applicant of the present application.
[0004]
FIG. 10 is a partial cross-sectional view of a conventional air blow gun type static eliminator. As shown in FIG. 10, in this conventional air blow gun type static eliminator 100, the air blow gun is provided with an electric part (discharge electrode part) of an ionizer. The air blow gun includes a cylindrical gun body 102 through which compressed air passes, an air hose 104 that supplies compressed air to the gun body 102, and an air nozzle 106 provided at the tip of the gun body 102.
[0005]
A discharge electrode portion 108 is provided for the air blow gun. The discharge electrode portion 108 is formed between a cylindrical insulator 108a and a center of the cylindrical insulator 108a provided between the gun body 102 and the air nozzle 106. A high voltage is applied to the discharge needle 108b via a high voltage cable 112 from a high voltage generator 110 located away from the gun body 102.
[0006]
FIG. 11 is a partial cross-sectional view of another conventional air blow gun type static eliminator. In this conventional air blow gun type static eliminator, a high voltage generator 110 is disposed integrally with the gun body 102.
[0007]
[Problems to be solved by the invention]
The point common to these conventional examples is that a high voltage discharge electrode portion is integrally incorporated in a part of the air blow gun. For this reason, the following problems occur in the conventional example.
(1) The air blow gun uses compressed air. Since the compressed air is conveyed to the air blow gun and is expanded at a stretch here, the air is adiabatically expanded and cooled, so that generation of water droplets in the air blow gun is inevitable. That is, as shown in the sectional view of the electric part (discharge electrode part) of the air blow gun type static eliminator in FIG. 12, the air blow gun is always accompanied by the generation of water droplets (moisture) 120. Electricity leaks from the discharge needle 108b and the high voltage cable 112 which are high voltage electrodes through this moisture. That is, electric leakage occurs. Therefore, a person working with an air blow gun by his / her hand is an electric shock and is dangerous.
[0008]
FIG. 13 shows the state of this leakage as a model electric circuit diagram. The high voltage V ₀ generated by the high voltage generation circuit 122 is guided to the discharge needle via the current limiting resistor R. When the voltage drop at the current limiting resistor R is V _D , the discharge voltage is V ₁ , the discharge current is I ₁ , and the leakage current is I ₂ ,
V ₁ = V ₀ -V _D
V _D = (I ₁ + I ₂ ) R
It becomes.
[0009]
Here, when the high voltage V ₀ = 5 KV, the current limiting current = 100 MΩ, and the discharge current I ₁ = ₁ μA,
If there is no leakage, I ₂ = 0.
V _D = (1 × 10 ⁻⁶ ) × (100 × 10 ⁶ ) = 100V
[0010]
Discharge needle voltage (V ₀ -V _D ) = 5 KV-100 V = 4.9 KV
It becomes.
On the other hand, if there is a leakage and the leakage current I ₂ = 50 μA,
V _D = (1 × 10 ⁻⁶ + 5 × 10 ⁻⁶ ) × (100 × 10 ⁶ ) = 5,100V
Discharge needle voltage = 5KV-5.1KV ≒ 0KV
Thus, since the voltage of the discharge needle is lowered, the discharge is stopped.
[0011]
Thus, when water droplets or the like adhere to the high voltage portion and an electric leakage occurs, not only an electric shock accident but also an essential charge eliminating function is impaired.
[0012]
(2) The discharge needle incorporated in the air blow gun is easily soiled and must always be cleaned. However, since the discharge needle is integrated in the gun, cleaning is difficult.
[0013]
(3) The air blow gun is a mechanical device, and uses compressed air, so it is strong enough to withstand high pressure. It was made to withstand water and oil, even if treated violently. On the other hand, since the static eliminator is an electrical device, it dislikes moisture very much and handles a high voltage. Therefore, it is necessary to completely perform electrical insulation in order to avoid leakage.
[0014]
As explained above, the air blow gun and the static eliminator are different from each other, but the current situation is that they are forcibly integrated. Therefore, in the past, there has always been an inevitable problem of leakage. .
[0015]
Accordingly, an object of the present invention is to electrically and structurally independently form an electric system part having a discharge needle that emits ions and an air blow gun system part having an air nozzle that injects air in order to prevent leakage. Nevertheless, an object is to provide an air blow gun type static eliminator that can improve the mixing of ions and air.
[0016]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention has an electric system part having a discharge needle for emitting ions, and an air nozzle for injecting air, which is formed electrically and structurally independent of the electric system part. In the air blow gun type static eliminator comprising an air blow gun system part, the discharge needle comprises a + ion discharge needle that emits + ions and a − ion discharge needle that emits ions, and the + ion discharge needle and the − ion discharge The air nozzle is arranged between the needle, the direction of the discharge needle is substantially directed to the direction of air ejection ejected from the air nozzle to improve the mixing of ions and air, and the direction of a plurality of discharge needles is ejected. The ion emission direction is further tilted so that the tornado occurs in a direction crossing the air, and the mixing of ions and air is improved .
[0017]
【Example】
In the air blow gun type static eliminator of the present invention, the electric system part and the air blow gun system part are configured as completely independent individual parts, but in a combined state, ions discharged from the discharge needle provided in the electric system part And compressed air emitted from an air nozzle provided in an air blow gun system section (hereinafter referred to as a gun system section).
[0018]
Before describing the configuration of the present invention, in order to easily understand the advantages of the present invention that the electrical system section and the air blow gun system section are configured as completely independent individual parts, first, the electrical system section. The characteristics that the gun system part normally has will be described.
(1) Life:
The life of the electrical system is determined by the life of the electronic components and is approximately 5 to 7 years, whereas the life of the gun system is usually 1 to 2 years, depending on how it is used. Since the lifespan of the two is thus greatly different, the gun system part with a short lifespan is replaced during use.
(2) Compatibility with moisture:
The electrical system part hates moisture most because it uses high voltage. When moisture enters, a leak occurs first and there is a risk of electric shock. In addition, since the discharging action is stopped or weakened due to electric leakage, the effect of removing electricity is insufficient. As a matter of course, there is a possibility that the electronic component breaks and breaks down due to water leakage. In contrast, the gun system is strong against water, oil, and in some cases dirt such as dust.
[0019]
As described above, since the electric system part and the gun system part each have inherent defects, when these are integrally formed as in the conventional example, the individual defects cannot be sufficiently compensated for in configuration.
[0020]
Next, the present invention will be described with reference to the drawings. FIG. 1 is a view showing a combination of an electric system part and a gun system part of an air blow gun type static eliminator of the present invention, in which FIG. 1a is a front view and FIG. 1b is a side view. FIG. 2 is a view showing a state (disassembled state) before combining the electric system part and the gun system part of the air blow gun type static eliminator of the present invention, of which FIG. 2a is a front view, and FIG. It is a side view.
[0021]
As shown in FIGS. 1 and 2, the electrical system unit 10 includes a main body 12 and discharge needles 14 and 14 (two discharge needles on the left and right in this embodiment) provided at the tip of the main body 12. On the other hand, the gun system unit 50 includes a main body 52 and an air nozzle 54 provided at the tip of the main body 52. The main body 12 of the electric system section 10 is configured to be detachable from the main body 52 of the gun system section 50 so that the lower part of the main body 12 of the electric system section can be properly seated on the main body 52 of the gun system section 50. In addition, the shape of the upper portion of the main body 52 is substantially complementary to the upper shape (note that the complementary shape is not shown for simplification of the drawing).
[0022]
Since it is configured in this way, the electrical system unit 10 and the gun system unit 50 of the present invention are completely separated both electrically and moisture, but structurally configured to be detachable. ing.
[0023]
Next, with reference to FIG. 3, the insulation structure of the electrical system unit 10 will be described. FIG. 3 is a schematic cross-sectional view taken along line 3-3 in FIG. In a state where the electrical system unit 10 and the gun system unit 50 are combined, a discharge (leakage) between the high voltage unit 20 occupied by the substantially metallic member of the electrical system unit 10 and the metallic air nozzle 54 of the gun system unit 50. The occurrence of
[0024]
As shown in FIG. 3, in this invention, the case insulated with respect to the high voltage part 20 is formed with the upper cabinet 16 and the lower cabinet 18, and these seams are located in the part of both sides. Since the discharge is generated through the seam portion of the insulating portion, the distance between the air nozzle 54 and the seam portion of the gun system unit 50 is largely separated as shown in FIG. It has become.
[0025]
Here, two power supply methods of a conventional static eliminator will be described. There are an AC static eliminator and a DC static eliminator. The AC static eliminator supplies an AC high voltage to one discharge needle, and radiates + ions and − ions alternately (shifted in time). On the other hand, the DC static eliminator supplies + high voltage and -high voltage to a pair of discharge needles, respectively, and mixes and emits + ions and -ions simultaneously.
[0026]
The static eliminator of the present invention is effective for the two methods described above and will be described below. FIG. 4 is an end view showing the AC static eliminator of the present invention, of which FIG. 4a is an end view showing one using one discharge needle, and FIG. 4b is an end face showing one using two discharge needles. FIG. By disposing the discharge needle 14 and the air nozzle 54 in this way, it is possible to supply ions and air in a well-mixed state while separating and insulating the electrical system part and the gun system part.
[0027]
FIG. 5 is an end view showing the DC static eliminator of the present invention, of which FIG. 5a shows an arrangement in which a pair of discharge needles and air nozzles are close to each other, and FIG. FIG. 5c shows an air nozzle arranged at the center of two pairs of discharge needles.
[0028]
5a to 5c, a pair of discharge needles 14 and 14 are disposed close to the air nozzle 54 (FIG. 5a), or the air nozzle 54 is disposed between the pair of discharge needles 14 and 14. An air nozzle 54 is arranged at the center of the cage (FIG. 5b) or the two pairs of discharge needles 14, 14, 14, 14 (FIG. 5c). In FIG. 5c, it is possible to make the left and right discharge needles have opposite polarities and to make all adjacent discharge needles have opposite polarities.
[0029]
By doing so, ions and air can be supplied in a well-mixed state while separating and insulating the electrical system part and the gun system part.
[0030]
FIG. 6 shows a method of mixing the air flow and ion flow well by tilting the discharge needle in the air blowing direction. The discharge needle 14 is tilted with respect to the air nozzle 54 so that the center line of the air flow and the ion flow from the discharge needle 14 intersect at a position L forward from the tip of the air nozzle 54 in the gun system.
[0031]
FIG. 7 shows a state in which an ion flow is supplied while twisting in a tornado shape in the air flow. This can be realized by tilting the discharge needles 14 on both sides in opposite directions.
[0032]
FIG. 8 shows a case where the discharge needles are arranged on the left and right with the air nozzle as a symmetrical point when the ion flow is supplied in a tornado shape, FIG. 8a is a front view, and FIGS. 8b and 8c are left and right side views. FIG. 8d is a bottom view. In this case, the left and right discharge needles 14 and 14 are slightly reversed, and one discharge needle is disposed slightly upward and the other is disposed slightly downward.
[0033]
FIG. 9 shows a case where the discharge needles are generally arranged when supplying the ion flow in a tornado shape, FIG. 9a is a front view, FIG. 9b and FIG. 9c are left and right side views, and FIG. Is a bottom view. That is, when the position of the air nozzle is not at the center of the pair of discharge needles, in this case, the left and right needles are directed in the tangential direction of the air nozzle so that a tornado can be formed.
[0034]
By doing so, ions and air can be supplied in a well-mixed state while separating and insulating the electrical system part and the gun system part.
[0035]
【The invention's effect】
As described above, according to the present invention, in order to prevent electric leakage, the electrical system part having a discharge needle for releasing ions and the air blow gun system part having an air nozzle for injecting air are electrically and structurally independent. In spite of being formed, an air blow gun type static eliminator capable of improving the mixing of ions and air can be obtained.
[Brief description of the drawings]
FIG. 1 is a view showing a state where an electric system part and a gun system part of an air blow gun type static eliminator of the present invention are combined.
FIG. 2 is a diagram showing a state before the electric system part and the gun system part of the air blow gun type static eliminator of the present invention are combined (disassembled state).
FIG. 3 is a schematic cross-sectional view taken along line 3-3 of FIG.
FIG. 4 is an end view of the AC static eliminator of the present invention.
FIG. 5 is an end view of the DC static eliminator of the present invention.
FIG. 6 is a side view for explaining a method of thoroughly mixing the air flow and the ion flow by tilting the discharge needle in the air blowing direction.
FIG. 7 is a perspective view showing a state where an ion flow is supplied to an air flow while twisting like a tornado.
FIG. 8 is a diagram showing discharge needles arranged on the left and right with an air nozzle as a symmetric point when an ion flow is supplied in a tornado shape.
FIG. 9 is a diagram showing a case where discharge needles are generally arranged when an ion flow is supplied in a tornado shape.
FIG. 10 is a partial cross-sectional view of one conventional air blow gun type static eliminator.
FIG. 11 is a partial cross-sectional view of another conventional air blow gun type static eliminator.
FIG. 12 is a cross-sectional view of an electric part (discharge electrode part) of an air blow gun type static eliminator.
FIG. 13 is an electrical circuit diagram of a model for explaining a situation of electric leakage.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Electric system part 12 Main body 14 Discharge needle 50 Air blow gun system part 52 Main body 54 Air nozzle

Claims (4)

In an air blow gun type static eliminator comprising an electric system part having a discharge needle for discharging ions, and an air blow gun system part having an air nozzle for injecting air, which is electrically and structurally independent from the electric system part The discharge needle is composed of a + ion discharge needle that emits + ions and a − ion discharge needle that emits − ions, and the air nozzle is disposed between the + ion discharge needle and the − ion discharge needle, The direction of the discharge needle is substantially directed to the direction of air ejection ejected from the air nozzle to improve mixing of ions and air, and the direction of the plurality of discharge needles is directed to the direction intersecting the ejection air so that a tornado occurs. An air blow gun type static eliminator characterized in that the ion emission direction is further inclined to improve mixing of ions and air . 2. The air blow gun type static eliminator according to claim 1, wherein a main body of the air blow gun system part is formed in a gun (gun) type shape, and a discharge part of the electrical system part is formed in a U-shaped cross section. The air nozzle is disposed between the + ion discharge needle and the − ion discharge needle, and is seated on the main body of the air blow gun system unit, and is intermediate between the + discharge needle and the − discharge needle. An air blow gun type static eliminator characterized by being arranged. The air blow gun type static eliminator according to claim 1, wherein the electric system part and the air blow gun system part are configured to be detachable or replaceable. The air blow gun type static eliminator according to claim 1, wherein the insulating case of the electric system part is divided vertically (horizontal division).

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