JP6438876B2 - Air equipment with air control unit - Google Patents

Description

  In the present invention, for example, air (which may be described as air or compressed air) ionized using corona discharge generated by applying high-voltage AC power to a needle-like electrode (discharge needle) is supplied from a nozzle. The present invention relates to an air device such as a static eliminating device that discharges electricity while discharging, and particularly relates to an air device that does not require external power supply. Furthermore, it is related with the air control unit used suitably for various air equipment especially including such a static elimination dust removal apparatus.

  Conventionally, a gun type static eliminator provided with a high voltage generating circuit, a discharge part (including electrodes), a nozzle, an air passage, a valve for opening and closing the air passage, and a trigger for operating the valve on a gun-shaped main body Is known. Such a known gun type static eliminator uses a commercial power source as a power source, and is connected to a commercial power outlet via a cord or a high voltage cable via an AC-DC adapter or a power transformer. For this reason, it cannot be used where there is no commercial power outlet, and there is a problem that a cord or a high voltage cable obstructs the operation.

  In response to such a problem, Japanese Utility Model Publication No. 6-44098 (Patent Document 1) discloses a static elimination dust removal apparatus that can be used in a place where there is no commercial power supply and that has good operability and can be easily downsized. The static elimination dust removing apparatus disclosed in Patent Document 1 applies a high voltage generated by a high voltage generation circuit to an electrode of a discharge unit, sends air to the discharge unit through an air passage, and generates ions generated in the discharge unit. A gun-type static-eliminating and dust-removing device that injects air from a nozzle with a generator that feeds power to a high-voltage generation circuit, and air rotating fins (rotary blades and windmills) that drive the generator are rotated by the air passing through the air passage. It is characterized in that it is arranged in the air passage.

Japanese Utility Model Publication No. 6-044098

  However, in this static elimination dust removal apparatus disclosed in Patent Document 1, the generator, the valve, and the nozzle are connected by a single flow path and the air used for power generation is used as it is as the dust removal air. In addition, the same flow of air flows through the generator and the nozzle. Air flow rate suitable for power generation with little fluctuation and rotation fins and generators not over-rotating (only one of rotation fins and generators may be described when explaining over-rotation below), dust removal target Despite the fact that the required flow rate characteristics differ from the air flow rate suitable for dust removal, the flow rate of which varies depending on the flow rate, so that the same flow rate of air flows through the generator and nozzle, ensuring stable power generation and / or dust removal Therefore, it is difficult to secure a necessary and sufficient flow rate, and it is difficult to achieve a satisfactory charge removal effect and / or dust removal effect. In particular, if an air flow rate suitable for dust removal is ensured, the rotating fins will be over-rotated, which may cause problems with the durability of the bearings that support the rotating fins and the rotating shaft of the generator.

  And the present condition is that the elemental technology (the air control unit etc. which concern on this invention mentioned later) for solving such a problem is not developed. These elemental technologies are not only applied to static elimination dust removal equipment, but are widely applied to many pneumatic equipment using air pressure, including air tools (air drivers, air impact wrenches, air sanders, air grinders, air drills, etc.). The technology used.

  In view of such problems, an object of the present invention is to provide an air control unit suitably used for various types of air equipment that does not require external power supply and an air equipment using the air control unit.

In order to achieve the above-described object, the present invention takes the following technical means.
That is, an air control unit according to an aspect of the present invention is an air control unit including an input port and an output port, and includes an input pipe connected to the input port and an output pipe connected to the output port. And a communication pipe having a flow area larger than the flow area of the input pipe that communicates the input pipe and the output pipe, and the input pipe is connected to the input pipe. A diameter smaller than the flow area of the communication pipe and larger than the flow area of the input pipe, which is provided so as to block the input pipe at a connecting portion between the pipe and the communication pipe. A spherical body, an elastic member in contact with the opposite surface of the connecting portion of the spherical body, and an adjustment member provided so that the elastic force of the elastic member can be adjusted.

An air device according to another aspect of the present invention can be configured to include the above-described air control unit, and generates power by rotating a rotor blade with air on a pipe line connected to the input port. The unit is connected.
Preferably, the air device may be configured such that a pipe line through which air that has passed through the power generation unit joins is connected to the output port side.

More preferably, in this air device, the power generation unit can be configured to be replaceable.
More preferably, it may be configured to further include a warning lamp for displaying a warning of an excessive power generation state or an underpower generation state by the power generation unit.

  ADVANTAGE OF THE INVENTION According to this invention, the air control unit used suitably for the various air apparatus which does not require the electric power supply from the outside, and an air apparatus using the same can be provided.

It is a functional block diagram of the static elimination dust removal apparatus which concerns on embodiment of this invention. It is sectional drawing of the air control unit of FIG.

Hereinafter, a charge and dust removal apparatus 1000 including an air control unit 1100 according to an embodiment of the present invention will be described in detail with reference to the drawings. Since the air control unit according to the present invention can be suitably used for various types of air equipment other than such a static elimination dust removal apparatus 1000, the static elimination dust removal apparatus is only an example of an application example.
The whole static elimination dust removal apparatus 1000 which concerns on this Embodiment is demonstrated with reference to the functional block diagram of this static elimination dust removal apparatus 1000 shown in FIG. This static elimination dust removal device 1000 is a stationary type (nozzle type and bar type) static elimination dust removal device, even if it is a small gun type static elimination dust removal device with good operability and portability. Even if it exists, for example, a part of the configuration of the charge removal / dust removal apparatus 1000 shown in FIG. 1 may be provided outside the charge removal / dust removal apparatus 1000, or any aspect may be employed.

  This charge removal dust removal apparatus 1000 is a charge removal dust removal apparatus that does not require external power supply. In general, the charge removal dust removal apparatus 1000 generates power using compressed air supplied from the outside, and generates power using electrodes ( The discharge unit 1400 includes a discharge unit 1400 that ionizes air using a corona discharge generated by applying to the discharge needle 1430), and a nozzle unit 1300 that ejects ionized air for discharging and dust removal. The static elimination dust removing apparatus 1000 is connected to a compressor 1002 that supplies air of a desired air pressure (for example, 0.1 to 0.7 MPa) via a compressor connection pipe 1010 and a valve 1004 by a compressed air pipe 1012.

  In this static elimination dust removing apparatus 1000, the compressed air supplied from the external compressor 1002 flows through the regulator 1006 (for example, depressurized to about 0.1 MPa) and the pre-power generation air pipe 1020 and is supplied to the power generation unit 1200. It is divided into air and second compressed air that flows through the air control unit 1100 and the duster air pipe 1030 and is supplied to the nozzle unit 1300 without passing through the power generation unit 1200.

Further, what is characteristic is that the static elimination dust removing device 1000 includes a first air pipe (a pre-power generation air pipe 1020 and a post-power generation air pipe 1040) through which the first compressed air flows, and a second air through which the second compressed air flows. A compressed air pipe 1012 upstream of the power generation unit 1200 and branched into a first air pipe side pipe 1012A and a second air pipe side pipe 1012B. In the nozzle unit 1300 on the downstream side of the compressed air from the unit 1200, the pipe on the first air pipe side and the pipe on the second air pipe side are merged.

  The power generation unit 1200 is connected to a pre-power generation air pipe 1020 and a post-power generation air pipe 1040, and includes a rotating blade 1210 housed in a housing case or the like, a generator 1220 that is a rotating electrical machine, and a generator 1220 connected to the generator 1220. The warning lamp 1230 displays a warning when the output voltage is out of the range of ± 2 V with respect to the rated voltage of 1220 (for example, DC 12 V).

  Further, the rotary blade 1210 and the generator 1220 are mechanically connected by a rotary shaft, and the rotary shaft is supported by a bearing. In this case, the flow rate of the first compressed air flowing through the first air pipe (the pre-power generation air pipe 1020 and the post-power generation air pipe 1040) is large, and the rotational speed of the generator 1220 rises beyond a predetermined range from the rated rotational speed. If the running time continues, the durability of mechanical parts such as bearings may be impaired.

  Here, as a general electrical characteristic of the generator 1220, when the flow rate is large and the rotational speed rises beyond a predetermined range from the rated rotational speed, the output voltage exceeds the range of + 2V from the rated output voltage, and the flow rate is increased. When the rotational speed falls below a predetermined range below the rated rotational speed, the output voltage exceeds the range of −2 V from the rated output voltage. Based on the electrical characteristics of the generator 1220, the warning lamp 1230 can display an overvoltage warning when, for example, the output voltage exceeds + 2V from the rated output voltage, and the output voltage is higher than the rated output voltage. If it exceeds -2V, an undervoltage warning can be displayed. Here, from the viewpoint of preventing a decrease in durability due to excessive rotation of the generator 1220, the warning lamp 1230 may only display an overvoltage warning.

The power generation unit 1200 is mounted on the static elimination dust removing device 1000 in a replaceable manner, and can be easily replaced in units of the power generation unit 1200 or parts constituting the power generation unit 1200.
The discharge unit 1400 ionizes the compressed air ejected from the nozzle unit 1300. The discharge unit 1400 includes a control board 1410 connected to the generator 1220 to receive the generated power, and a high voltage power generation board that generates high voltage power based on the power generated by the generator 1220 connected to the control board 1410. 1420 and a discharge needle 1430 that is connected to a high voltage power generation substrate 1420 and generates a corona discharge when high voltage power is applied.

Since control board 1410, high-voltage power generation board 1420 and discharge needle 1430 (the structure of discharge needle 1430 itself) are known, detailed description thereof will not be repeated here.
And the static elimination dust removal apparatus 1000 which concerns on this Embodiment is the point by which the air control unit 1100 is provided in the 2nd air piping side, and is the biggest characteristics. The air control unit 1100 will be described with reference to FIG.

  This air control unit 1100 adjusts the flow rate of air flowing through the duster air pipe 1030 having the input port 1012BP for connecting the pipe 1012B on the second air pipe side and the output port 1030P for connecting the duster air pipe 1030. The generator 1220 maintains rotation at a desired number of revolutions by adjusting the flow rate of air supplied to the rotor blades 1210 of the power generation unit 1200 through the first air pipe (pre-power generation air pipe 1020 and post-power generation air pipe 1040). Thus, desired power (voltage) is generated.

The air control unit 1100 includes an input line 1110 connected to the input port 1012BP, an output line 1130 connected to the output port 1030P, and an input line that connects the input line 1110 and the output line 1130. And a communication conduit 1120 having a larger flow area than the flow area of 1110. In addition, the communication pipe line 1120 is smaller than the flow path area of the communication pipe line 1120 provided so as to block the input pipe line 1110 at the connecting portion between the input pipe line 1110 and the communication pipe line 1120, and A spherical body 1124 having a diameter larger than the flow path area of the input pipe 1110, an elastic member 1122 in contact with the opposite surface of the connecting portion of the spherical body 1124, and an elastic force of the elastic member 1122 are provided to be adjustable. An adjustment member 1104.

  More specifically, as shown in FIG. 2, the air control unit 1100 is formed by processing a substantially rectangular parallelepiped metal material (referred to as a rectangular parallelepiped 1102), an input port 1012 BP, an input pipeline 1110, an output port 1030 P, and an output. A pipe line 1130 and a communication pipe line 1120 are formed. Here, a coil spring is used as the elastic member 1122, and a hexagon bolt is used as the adjusting member 1104 for adjusting the elastic force of the coil spring. This hexagonal bolt is screwed into a female screw 1106 provided in a hole coinciding with the tube diameter central axis of the input port 1012BP of the rectangular parallelepiped 1102. When the hexagon bolt is retracted with respect to the rectangular parallelepiped 1102, the elastic force of the coil spring which is the elastic member 1122 is reduced, and the flow path area at the connection portion between the input pipe line 1110 and the communication pipe line 1120 is widened. Increasing the flow rate of air flowing to the connected output line 1130 results in a decrease in the flow rate flowing to the power generation unit 1200. Conversely, when this hexagonal bolt is advanced relative to the rectangular parallelepiped 1102, the elastic force of the coil spring, which is the elastic member 1122, increases, and the flow area at the connecting portion between the input pipe line 1110 and the communication pipe line 1120 is narrowed to reduce the output port. The flow rate of air flowing to the output pipe 1130 connected to 1030P is reduced, and as a result, the flow rate flowing to the power generation unit 1200 is increased.

  The dimensions (particularly the flow path area) of the air control unit 1100, the elastic force of the elastic member 1122, and the adjustment width of the adjustment member 1104 are set so that such operational effects can be exhibited. The elastic member 1122 is not limited to the coil spring, and the adjustment member 1104 is not limited to the combination of the hexagon bolt and the female screw 1106 provided on the rectangular parallelepiped 1102.

The usage method of the static elimination dust removal apparatus 1000 provided with the air control unit 1100 provided with the above structures is demonstrated.
When this static elimination dust removal apparatus 1000 is provided with a small gun-type appearance shape with good operability and portability, the same compressor 1002 is not always connected and compressed air is not supplied. Every time it is changed, it is adjusted by the following usage. In addition, as described above, in this static elimination dust removal apparatus 1000, the power generation unit 1200 is configured to be replaceable (can be replaced in units of power generation units 1200 or replaceable in units of components constituting the power generation unit 1200). Even when the compressor 1002 to be changed is not changed, every time the power generation unit 1200 is replaced, the adjustment is made by the following usage method.

  In the following description, the static elimination dust removing apparatus 1000 is connected to the compressor 1002 that supplies air having a desired air pressure (for example, 0.1 to 0.7 MPa) via the compressor connection pipe 1010 and the valve 1004. The regulator 1006 is set to be depressurized to a desired air pressure (for example, depressurized to about 0.1 MPa). In order to prevent overrotation of the rotor blades 1210, the flow rate of the second compressed air flowing through the duster air pipe 1030 and flowing into the nozzle unit 1300 is not zero (the power generation unit 1200 suddenly receives a large flow rate of air). The adjustment member 1104 of the air control unit 1100 is initially set (in order to avoid excessive rotation of the rotating blade 1210).

  The valve 1004 is opened, and compressed air is supplied from the compressor 1002 to the static elimination dust removing apparatus 1000. When the first compressed air is supplied to the power generation unit 1200 through the pre-power generation air pipe 1020, power generation is started. Further, the second compressed air is supplied to the nozzle unit 1300 through the air control unit 1100 and the duster air pipe 1030 (without passing through the power generation unit 1200), and the air starts to be injected from the nozzle unit 1300.

Unless the warning lamp 1230 of the power generation unit 1200 displays a warning, the operator does not particularly operate the adjustment member 1104 of the air control unit 1100.
When the warning lamp 1230 of the power generation unit 1200 displays an overvoltage warning (when the output voltage exceeds the range of +2 V), the flow rate of air flowing through the power generation unit 1200 is large, and the rotation speed is predetermined than the rated rotation speed. Therefore, the operator retreats the hexagon bolt, which is the adjustment member 1104 of the air control unit 1100, with respect to the rectangular parallelepiped 1102 to reduce the elastic force of the coil spring, which is the elastic member 1122, and inputs it. The flow area at the connecting portion between the pipe line 1110 and the communication pipe line 1120 is increased to increase the flow rate of air flowing to the output pipe line 1130 connected to the output port 1030P, and consequently the flow rate flowing to the power generation unit 1200 is decreased. Let At this time, the hexagon bolt, which is the adjustment member 1104 of the air control unit 1100, is retracted with respect to the rectangular parallelepiped 1102 until the overvoltage warning is not displayed (the hexagon bolt (assuming that it is a normal right screw) is turned counterclockwise. turn).

  When the warning lamp 1230 of the power generation unit 1200 displays an undervoltage warning (when the output voltage exceeds the range of −2 V), the flow rate of air flowing through the power generation unit 1200 is small and the rotational speed is higher than the rated rotational speed. Since the pressure is lower than a predetermined range, the operator advances the hexagon bolt, which is the adjustment member 1104 of the air control unit 1100, with respect to the rectangular parallelepiped 1102 to increase the elastic force of the coil spring, which is the elastic member 1122. The flow area flowing in the power generation unit 1200 is reduced by reducing the flow rate of the air flowing to the output pipeline 1130 connected to the output port 1030P by narrowing the flow path area at the connection portion between the input pipeline 1110 and the communication pipeline 1120. increase. At this time, the hexagon bolt, which is the adjustment member 1104 of the air control unit 1100, is advanced relative to the rectangular parallelepiped 1102 until the undervoltage warning is not displayed (the hexagon bolt (assuming that it is a normal right screw) is turned clockwise). ).

In this case, from the viewpoint of preventing a decrease in durability due to excessive rotation of the generator 1220, only the operation corresponding to the overvoltage warning may be executed.
After the adjustment, when the static elimination dust removal device 1000 is continuously used, the above-mentioned case is also described when the warning lamp 1230 of the power generation unit 1200 displays an overvoltage warning or an undervoltage warning for some reason. Adjust according to the usage.

  As described above, according to the static elimination dust removing apparatus according to the present embodiment, which is a type of air equipment, the compressed air used for power generation and the compressed air for dust removal are divided so that no external power supply is required. Since the neutralization dust removal apparatus is realized, it is possible to provide a neutralization dust removal apparatus that sufficiently exhibits the neutralization function and the dust removal function and that does not impair the durability of the power generation unit. And the static elimination dust removal apparatus which expresses such a special effect is implement | achieved by using the air control unit which concerns on this invention.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  The air control unit according to the present invention can be suitably applied to an air device that requires no external power supply (as an example, a static elimination device), and particularly suitable for an air device that does not impair the durability of the power generation unit. Can be applied.

1000 Static elimination dust removing device 1100 Air control unit 1200 Power generation unit 1300 Nozzle unit 1400 Discharge unit

Claims (3)

An air device using an air control unit having an input port and an output port,
The air control unit is
An input line connected to the input port;
An output line connected to the output port;
A communication line having a flow area larger than the flow area of the input line, which communicates the input line and the output line;
In the communication line,
Provided so as to block the input pipeline at the connection portion between the input pipeline and the communication pipeline, and smaller than the flow channel area of the communication pipeline and smaller than the flow channel area of the input pipeline A large diameter sphere,
An elastic member in contact with the opposite surface of the connecting portion of the spherical body;
An adjustment member provided so that the elastic force of the elastic member can be adjusted ;
The air device is
A power generation unit that generates power by rotating the rotor blades with air is connected to the pipe line side connected to the input port,
An air device in which a pipe line through which air that has passed through the power generation unit joins is connected to the output port side . The air device according to claim 1 , wherein the power generation unit is configured to be replaceable. The air device according to claim 2, further comprising a warning lamp that warns and displays an excessive power generation state or an underpower generation state by the power generation unit.

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