JP2022097342A - Fire extinguisher and fire extinguishing method - Google Patents

Abstract

To enable the high fire extinguishing performance to be secured by efficiently inputting charged water particles from the outside of a building where fire occurs.SOLUTION: A spray air stream releasing part 10 is provided on a ladder tip or the like of a fire engine with a ladder and releases charged fine spray air streams 12 containing charged water particles in the air stream to a fire extinguishing object or fire prevention object. Water for fire extinguishing is supplied from a fire-extinguishing agent supply part 16 of the fire engine with a ladder to the spray air stream releasing part 10, and the high voltage for generating the charged water particles is supplied from a high voltage power supply part 18 to the spray air stream releasing part 10. A release direction adjustment part adjusts the release direction of the charged fine spray air streams 12 by the spray air stream releasing part 10 in the vertical direction and longitudinal direction.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fire extinguishing device and a fire extinguishing method for extinguishing a fire by discharging a fine spray airflow containing charged water particles from the tip of a ladder of a ladder fire engine.

Conventionally, when a fire breaks out in a building such as a condominium or a building that does not have an automatic fire extinguishing device such as a sprinkler system, if the initial fire cannot be extinguished by a fire extinguisher or a fire hydrant, the fire brigade is dispatched to extinguish the fire or prevent the spread of fire. Work is done.

At this time, the fire brigade did not rush into the fire area, and if the fire area and heavy smoke were severe and there seemed to be no rescuers, and the fire area was solid, the fire area would have windows, etc. If there is an opening on the outer wall, wet and cool water is discharged to the part where there is a possibility of fire spreading or heat destruction due to the flame or heat radiation ejected from the opening.

However, when the fire extinguishing water is discharged from the opening of the outer wall into the fire section, the fire source is often invisible and the aim may not be properly determined. Further, for example, in the case of a fire in an apartment house, if there is a residential area or a commercial facility on the lower floor of the fire area, if a large amount of water is discharged to the fire area, the water will flow to the lower floor and cause great water damage.

If the water can be discharged effectively to extinguish the fire, there is no choice but to avoid water damage caused by a large amount of water by hitting it unnecessarily. Therefore, it is often difficult to grasp the source of water from the opening of the outer wall to the fire area due to heavy smoke, and if the aim is not properly determined, it is often not actively performed. As a result, as a fire response, we will focus on water discharge work to prevent the spread of fire outside the fire area and water discharge work to prevent thermal destruction of the fire doors, walls, and windows that form the fire area, and enter the fire area. It may be necessary to minimize the amount of water discharged for extinguishing the fire and wait for the fire to decline due to burning out.

When such a firefighting tactic is adopted, not only the damage of the burnt material becomes large, but also the burning duration of the fire is long and the combustion chamber becomes high temperature. Even in the case of a fire-resistant building known as the 8th section to which the decree is applied, there is a problem that the building structure is greatly damaged and the damage caused by heavy smoke is also large.

In order to solve this problem, a fine spray fire extinguishing device that discharges fine spray water particles and a charged fine spray water particle are discharged to the rod-shaped water discharge by the pipe (water discharge nozzle) mainly used by the fire brigade. Charged fine spray fire extinguishing devices are known, and it is expected that these devices can efficiently extinguish a fire with a small amount of water and reduce water damage.

Japanese Unexamined Patent Publication No. 2009-106405 Japanese Unexamined Patent Publication No. 2018-183712

However, although the conventional fine spray fire extinguishing device can extinguish a fire with high efficiency even with a small amount of water and it is easy to think that the water loss is small, in reality, the fire extinguishing ability is low and the fire cannot be extinguished in many cases. The reason is that finely sprayed water particles with a particle size of several tens to several hundreds of μm are radiated and immediately stall due to air resistance, and the range is short and they cannot reach the fire source with sufficient collision speed. Furthermore, since there is a violent updraft near the fire source, the fine spray water particles are blown away, and there are few fine spray water particles that can reach the fire source.

In addition, since the combustion surface of the fire source is hot, for example, under conditions such as the surface of a fire, the gas near the boundary of the combustion surface violently undergoes molecular motion due to the high temperature and has already stalled. Since the finely sprayed water particles have a small momentum, they cannot break through the region of intense molecular motion and are repelled. Here, the space near the boundary of the combustion surface where the gas is violently moving is called a dust-free space, but in order to break through this dust-free space, a certain size of particle size and speed, that is, momentum is required. Yes, water particles with a particle size in millimeters found in sprinkler equipment are desirable. For this reason, the finely sprayed water particles cannot be expected to hit the high temperature surface and be sufficiently wetted.

In addition, the idea is that the finely sprayed water particles receive heat in the space near the combustion surface and evaporate, and most of them become water vapor, and the fire force is weakened by the decrease in the atmospheric temperature due to the heat of vaporization and the decrease in the oxygen concentration due to the generated water vapor. However, it is a mistake, and since the specific gravity of the generated water vapor is as light as about 60% of the air, the water vapor rises due to buoyancy, which has the effect of accelerating the updraft near the fire source. The convection may introduce fresh air into the fire source and conversely fuel the fire. For this reason, the fine spray fire extinguishing device has the merit of reducing water damage, but has the problem that the essential fire extinguishing performance and fire suppression performance are very low.

Further, in the conventional charged fine spray fire extinguishing device, the charged fine spray water particles sprayed from the head break through the dust-free space near the boundary of the combustion surface where the gas violently moves due to electrostatic attraction. Although it can be done, since the finely sprayed water particles have the same polarity immediately after being discharged from the charged fine spray head, they repel each other and spread instantly in all directions to flow the fine spray. There remains the problem that it cannot be formed and cannot reach even the vicinity of a fire source that is a little far away.

An object of the present invention is to provide a fire extinguishing device and a fire extinguishing method capable of efficiently injecting charged water particles toward a fire extinguishing target or a fire prevention target to ensure high fire extinguishing performance and fire suppression performance.

(Fire extinguishing device 1)
The present invention is a fire extinguishing device, characterized in that a charged fine spray airflow containing charged water particles in an air flow is discharged toward a fire extinguishing target or a fire prevention target.

(Fire extinguishing device 2)
The present invention is a fire extinguishing device.
A spray airflow discharging unit that discharges a charged fine spray airflow containing charged water particles in the airflow toward a fire extinguishing target or a fire prevention target.
A fire extinguishing agent supply unit that supplies fire extinguishing water to the spray airflow discharge unit,
A high-voltage power supply unit that supplies a high voltage for generating charged water particles to the spray airflow discharge unit,
Charged by the spray airflow discharge part The discharge direction adjustment unit that adjusts the discharge direction of the fine spray airflow,
Is characterized by being provided.

(Spray airflow discharge part)
The spray airflow discharge part is
The air blower that generates air flow and
A charged fine spray head that sprays and contains charged water particles in the air flow generated by the blower.
To prepare for.

(Adjustment of applied voltage and polarity switching)
The high voltage power supply unit
A voltage adjusting unit that adjusts the voltage applied to the charged fine spray head according to the fire extinguishing target or fire prevention target,
A polarity switching unit that switches the polarity of the voltage applied to the charged fine spray head according to the fire extinguishing target or fire prevention target.
To prepare for.

(Discharge direction adjustment unit)
The emission direction adjustment unit is
A vertical adjustment unit that adjusts the discharge direction of the charged fine spray airflow in the vertical direction,
A left-right direction adjustment unit that adjusts the discharge direction of the charged fine spray airflow in the left-right direction,
Equipped with
The rotation axis of the vertical direction adjustment unit and the rotation axis of the left-right direction adjustment unit are arranged at predetermined positions on the tip side of the center of gravity position of the spray airflow discharge unit.

(Fire engine equipped with fire extinguishing device)
The spray airflow discharge unit is provided at the tip of the ladder of the ladder fire engine, the aerial work platform of the aerial work platform, or the boom tip of the fire engine with a boom.

(Fire extinguishing method 1)
The present invention is a fire extinguishing method, characterized in that a fire extinguishing device discharges a charged fine spray air flow containing charged water particles in an air flow toward a fire extinguishing target or a fire prevention target.

(Fire extinguishing method 2)
The present invention is a fire extinguishing method.
The spray airflow discharge unit discharges a charged fine spray airflow containing charged water particles in the airflow toward a fire extinguishing target or a fire prevention target.
The fire extinguishing agent supply unit supplies fire extinguishing water to the spray airflow discharge unit.
The high-voltage power supply unit supplies a high voltage to the spray airflow discharge unit to generate charged water particles.
The discharge direction adjusting unit adjusts the discharge direction of the charged fine spray airflow by the spray airflow discharge part.
It is characterized by that.

(Effect of fire extinguishing device)
According to the present invention, in the event of a fire in a building such as a building, for example, a charged fine spray airflow containing charged water particles is discharged by a spray airflow discharge portion provided at the tip of a ladder of a ladder fire truck. Since the fire is thrown into the fire section of the fire floor and the surrounding section through the opening of the outer wall such as a window, the fire source cannot be confirmed due to the thick smoke when the water is discharged by the conventional pipe (nozzle), and the water is damaged to the lower floor. Due to fear, water may not be discharged, or the fire extinguishing device with a smaller amount of water may be swept away by the fire airflow, so the fine spray did not reach the vicinity of the fire source and the fire extinguishing effect could not be expected. The fine spray airflow is hard to be swept away by the fire airflow and can efficiently deliver charged water particles to the vicinity of the fire source, and the charged water particles delivered to the vicinity of the fire source are blind spots in the conventional fine spray fire extinguishing due to electrostatic force. It is possible to effectively extinguish the fire by wrapping around the combusting surface with a complicated shape and arriving to surround it.

In addition, the dust-free space existing at the boundary of the high-temperature combustion surface could not be breached by the conventional fine spray fire extinguishing device due to its small momentum. It has high fire extinguishing performance because it adheres.

Further, in the conventional fine spray fire extinguishing device, the smoke particles that happen to collide with water particles are captured in the space, but the charged water particles introduced by the charged fine spray air flow are caused by electrostatic force in the space. It also has high smoke extinguishing performance because it collects and captures smoke particles.

In addition, the charged water particles that have been introduced have high smoke-dissipating performance, and unlike rod-shaped water discharge, they do not give an impact to the human body, and the fire brigade rushes in and rescues in parallel with the introduction of the charged fine spray airflow. Make it possible.

(Effect of spray airflow discharge part)
In addition, the spray airflow discharge part has a simple structure composed of a blower part and a charged fine spray head, and by changing the diameter of the blower part and the number of charged fine spray heads, the size of the charged fine spray airflow can be adjusted. The strength can be set optimally according to the fire extinguishing target and fire prevention target.

(Effect of adjusting applied voltage and switching polarity)
In addition, the voltage adjustment unit and polarity switching unit of the high-voltage power supply unit can freely adjust the charge polarity and amount of water particles sprayed from the charge fine spray head, making it suitable for extinguishing fires and smoke at fire sites. A charged fine spray air stream containing water particles having a polarity and a charge amount can be introduced. If the fire extinguishing target or the fire prevention target is charged or easily charged, a charged fine spray air stream containing charged water particles having the opposite polarity (or opposite polarity) to the charging polarity can be introduced. Higher fire extinguishing performance and smoke extinguishing performance can be expected, and it is possible to prevent discharge accidents that may occur due to an increase in the amount of charge due to charged fine spray water for a fire extinguishing target or a fire prevention target that is easily charged. do.

(Effect of emission direction adjustment part)
In addition, the discharge direction adjusting unit freely adjusts the discharge direction of the charged fine spray airflow in the vertical direction and the horizontal direction, so that the operator can accurately discharge the charged fine spray airflow toward the fire extinguishing target or the fire prevention target. It is possible to do. In addition, the rotation axis of the vertical adjustment unit and the rotation axis of the left / right adjustment unit are arranged at predetermined positions on the tip side of the center of gravity of the spray airflow discharge unit, so that the charged fine spray airflow emitted by the spray airflow discharge unit is generated. The discharge direction is stable even if it receives the reaction force of, and the discharge direction can be easily adjusted according to the operator's will. Further, for example, when the spray airflow discharge part is installed in the bucket part at the tip of the ladder of the fire engine ladder, the stability of the spray airflow discharge part is high even when the basket part is tilted. It is possible to prevent the emission of the charged fine spray airflow from going in an unexpected direction, and it can be operated safely.

(Effect of fire engine equipped with fire extinguishing device)
Further, for example, even in the case of a fire at a high place on the second floor or higher of a building, it is provided at the tip of a ladder of a ladder fire engine, a high work table of a high-altitude work fire engine, or a boom tip of a fire engine with a boom. It is possible to secure high fire extinguishing performance and smoke extinguishing performance by easily and efficiently injecting a charged fine spray airflow into the building by approaching the spray airflow discharging part to the opening of the outer wall such as a window.

(Effect of fire extinguishing method)
In the fire extinguishing method of the present invention, the same effect as the above-mentioned fire extinguishing device can be obtained.

It is explanatory drawing which showed the embodiment of the fire extinguishing apparatus of this invention. It is explanatory drawing which showed the embodiment of the spray airflow discharge part of FIG. It is explanatory drawing which showed the embodiment of the charge fine spray head provided in the spray air flow discharge part of FIG. It is explanatory drawing which showed the embodiment of the high voltage power source part of FIG. 1 together with the charge fine spray head. It is explanatory drawing which showed the pulse voltage applied to the charge fine spray head by the high voltage power source part of FIG. It is explanatory drawing which showed the pulsating current voltage applied to the charge fine spray head by the high voltage power source part of FIG. It is explanatory drawing which showed the AC voltage applied to the charge fine spray head by the high voltage power source part of FIG. It is explanatory drawing which showed the fire extinguishing activity by the ladder fire engine equipped with the fire extinguishing apparatus of this invention.

Hereinafter, embodiments of the fire extinguishing device and the fire extinguishing method according to the present invention will be described in detail with reference to the drawings. The present invention is not limited to the following embodiments.

[Basic concept of embodiment]
First, the basic concept of the embodiment will be described. The embodiment generally relates to a fire extinguishing device provided on a moving body such as a fire engine. The fire extinguishing device includes the concept of fire extinguishing equipment and fire extinguishing equipment.

As an example, the fire extinguishing device is composed of a spray air flow discharge unit, a fire extinguishing agent supply unit, a high-voltage power supply unit, and a discharge direction adjusting unit.

The "spray airflow discharge unit" is a unit that discharges a charged fine spray airflow containing charged water particles in the air flow toward a fire extinguishing target or a fire prevention target. It is composed of a charged water particle generation unit provided with a fine spray head.

Here, the "blower" is one that generates an air flow. Further, the "charged fine spray head" is for spraying and containing charged water particles in the air flow generated by the blower unit. In addition, "containing" is a concept including miscibility, mixing, mixing and the like.

Further, the "charged water particles" are droplets contained in the spray flow of the water-based spray liquid discharged from the charged fine spray head, generated by a predetermined high voltage applied to the charged fine spray head from the high voltage power supply device. It is charged by an induced charging method that allows the particles to pass through the high voltage.

Further, the "charged fine spray airflow" is an air flow generated in the blower portion containing charged water particles sprayed from the charged fine spray head, and is difficult to be flown by the fire airflow in the vicinity of the fire source. It can efficiently deliver charged water particles.

The charged water particles delivered to the fire compartment by the charged fine spray air flow adhere to the combustion surface due to electrostatic force to extinguish the fire, and the charged water particles are dust-free spaces existing at the boundary portion of the high-temperature combustion surface. Is breached by electrostatic force and adheres to the combustion surface to extinguish the fire. Further, the charged water particles delivered to the fire section are extinguished by collecting and capturing smoke particles in the space by electrostatic force.

Further, as an example, the spray airflow discharging part is provided at the tip of the ladder of the ladder fire engine, the high-altitude work table of the high-altitude work fire engine, or the boom tip of the fire engine with a boom. It is possible to extinguish a fire or smoke by efficiently injecting a charged fine spray airflow into the building by approaching an opening of an outer wall such as a window of a fire section.

The "fire extinguishing agent supply unit" is a unit that supplies fire extinguishing water to a spray airflow discharge unit, and is a concept including, for example, a pressurized water supply device such as a fire extinguishing pump.

The "high voltage power supply unit" supplies a high voltage for generating charged water particles to the spray airflow discharge unit, and for example, a DC voltage, a pulsating current voltage, an AC voltage, or a pulse voltage is charged and finely sprayed. It is applied to the head. Further, the "high voltage power supply unit" is composed of a voltage adjusting unit and a polarity switching unit as an example. Here, the "voltage adjusting unit" adjusts the voltage applied to the charged fine spray head, and inputs a charged fine spray airflow containing water particles of a charged amount suitable for extinguishing a fire or smoke at a fire site. It is what makes it possible to do.

In addition, the "polarity switching unit" switches the voltage polarity applied to the charged fine spray head, and inputs a charged fine spray airflow containing water particles with a charged polarity suitable for fire extinguishing and smoke extinguishing at a fire site. If the fire extinguishing target or the fire prevention target is charged or easily charged, a charged fine spray airflow containing charged water particles having a polarity opposite to the charge polarity is applied. By putting it in, it is possible to extinguish more fire and smoke.

The "emission direction adjusting unit" adjusts the emission direction of the charged fine spray airflow by the spray airflow emission unit, and is composed of, for example, a vertical direction adjustment unit and a left-right direction adjustment unit. Here, the "vertical direction adjusting unit" adjusts the discharge direction of the charged fine spray airflow in the vertical direction (vertical turning direction), and the "left-right direction adjusting unit" refers to the charged fine spray airflow. The emission direction is adjusted in the left-right direction (horizontal turning direction). Further, the discharge direction adjusting unit arranges the rotation axis of the vertical direction adjustment unit and the rotation axis of the left-right direction adjustment unit at a predetermined position on the tip side of the center of gravity of the spray airflow discharge unit, thereby discharging. Even if it receives the reaction force of the charged fine spray airflow, the discharge direction of the spray airflow discharge part is stable, and it is possible to easily adjust the discharge direction at the will of the operator.

Hereinafter, specific embodiments will be described. In the specific embodiment shown below, a case where the "fire extinguishing target" is the "fire section of the building" and the "spray airflow discharging part" is provided at the tip of the ladder of the ladder fire engine will be described.

[Specific Embodiment of Fire Extinguishing Device]
The fire extinguishing device of the present embodiment is mounted on a fire engine such as a ladder fire engine and discharges a charged fine spray airflow containing charged water particles in the air flow toward a fire extinguishing target or a fire prevention target. The configuration and structure thereof are arbitrary, but for example, as shown in FIG. 1, the operation panel 14 is provided with a spray air flow discharge unit 10, an operation panel 14, a fire extinguishing agent supply unit 16 and a high-pressure power supply unit 18, and the operation panel 14 has an operation display. A unit 20 and a control unit 21 are provided. The spray airflow discharge unit 10 is rotatably arranged vertically and horizontally on the gantry 40, the water supply pipe 22 from the fire extinguishing agent supply unit 16 is connected, and the high voltage cable 24 from the high voltage power supply unit 18 is connected and operated. The signal cable 26 from the control unit 21 of the board 14 is connected.

[Spray airflow discharge part]
The spray airflow discharging unit 10 will be described in more detail. The spray airflow discharge unit 10 discharges the charged fine spray airflow 12 toward a fire extinguishing target or a fire prevention target, and the configuration and structure thereof are arbitrary. For example, the blower unit 28 and the charged water particle generation unit 30. To prepare for. The blower unit 28 generates an air flow toward the front, and the charged water particle generation unit 30 arranged at the outlet of the blower unit 28 sprays the charged water particles into the air flow from the blower unit 28. The charged microspray airflow 12 containing the charged water particles is discharged toward the front. The spray airflow discharging unit 10 is provided at the tip of a ladder of a ladder fire engine, for example, and charges a fine spray airflow 12 from the outside of a building or the like where a fire has occurred to the fire section through an opening of an outer wall such as a window. extinguish a fire.

2A and 2B show the spray airflow discharging unit 10 of FIG. 1 in more detail. FIG. 2A shows a rear view and FIG. 2B shows a side view. FIG. 2C shows a front view seen from the front.

[Blower]
The blower unit 28 will be described in more detail. As an example, the axial flow fan 34 driven by the fan motor 36 is arranged in the cavity opened in the front-rear direction of the blower portion 28, and the air sucked from the rear opening is pressurized by the rotation of the axial flow fan 34 to the front. It releases an air flow from the opening. The air volume of the air flow discharged from the blower unit 28 is arbitrary, but for example, the maximum air volume is about 400 m ³ / min. Further, by changing the rotation speed of the axial flow fan 34 by the fan motor 36, it is possible to change the air volume as needed.

When the spray airflow discharge unit 10 is provided at the tip of the ladder of the ladder fire engine, it is possible to approach the fire section of the building by several meters, so that the reach of the charged fine spray airflow 12 toward the front is, for example. The amount of air blown by the air blower unit 28 is set so as to be about 10 meters. Further, a protective cover 38 using a multiple ring, a wire mesh, or the like is attached to the suction port 28a on the rear side of the blower portion 28.

[Charged water particle generator]
The charged water particle generation unit 30 will be described in more detail. A charged water particle generation unit 30 is arranged in the opening on the front side of the blower unit 28. When viewed from the front as shown in FIG. 2C, the charged water particle generation unit 30 has a plurality of charged fine spray heads 32, for example, 10 charged fine spray heads 32 arranged in an annular shape inside the support ring 31. ing. Here, the spray shafts of the plurality of charged fine spray heads 32 are arranged so as to intersect the discharge shaft 25 of the charged fine spray airflow 12, and when viewed from the side surface of FIG. 2B, the plurality of charged fine spray heads 32 are arranged. The spray shafts of the spray head 32 are arranged so as to intersect at a point P in front of the discharge shaft 25.

Here, the crossing angle θ between the spray shaft of the charged fine spray head 32 and the discharge shaft 25 of the charged fine spray airflow 12 intersecting at point P is the ejection speed and ejection spread angle of the charged water particles from the charged fine spray head 32. A predetermined angle in which the ejected charged water particles are well contained in the air flow in consideration of the wind speed of the air flow from the air blower 28, for example, a predetermined angle in the range of 45 ° to 90 °. For example, it is set to 60 °.

[Charged fine spray head]
Next, the charged fine spray head 32 provided in the charged water particle generation unit 30 of FIG. 2 will be described in more detail. FIG. 3 shows the charged fine spray head 32 taken out, FIG. 3 (A) shows a perspective view seen from the spray side, and FIG. 3 (B) shows a side view.

As shown in FIG. 3, the charged fine spray head 32 sprays and contains charged water particles in the air flow from the blower unit 28, and the configuration and structure thereof are arbitrary, but as an example. It is composed of a body 54, an injection nozzle portion 56, an electrode holding portion 58, an induction electrode portion 60, a water side electrode portion 62, and a water supply connecting portion 64. The body 54, the injection nozzle portion 56, the electrode holding portion 58, and the water supply connection portion 64 are made of an insulating material.

A through hole is formed inside the body 54 in the direction of the spray shaft 55, a conductive water-side electrode portion 62 is fitted from below, a water supply connection portion 64 is fitted above the water supply connection portion 64, and the water-side electrode portion 62 is fitted. An earth cable is connected to the electrode connection portion 62a from the outside. Pressurized water is supplied to the water supply connection portion 64. An injection nozzle portion 56 is provided on the tip end side of the water side electrode portion 62, and for example, water particles having an average particle diameter of 100 to 300 μm are discharged.

A ring-shaped induction electrode portion 60 is arranged by the electrode holding portion 58 in the open space on the tip end side of the injection nozzle portion 56. The structure and structure of the inductive electrode portion 60 are arbitrary, but are formed by, for example, insulatingly coating a conductive electrode core material. A voltage application cable is connected from the outside to the cable connection portion 60a of the induction electrode portion 60.

Between the induction electrode unit 60 and the water side electrode unit 62, from the high voltage power supply unit 18 shown in FIG. 1, for example, a predetermined adjustment range (for example, 0.5 kV to A predetermined voltage adjusted from 20 kV) (for example, a DC voltage of 10 kV) is applied. By this applied voltage, a predetermined external electric field is formed around the ring portion of the induction electrode portion 60, the water particles sprayed from the injection nozzle portion 56 are charged by the induction charging method, and the spray flow of the charged water particles is generated. It is released.

Here, the predetermined adjustment range (that is, the adjustable predetermined range) may include a voltage range in which the water particles cannot be charged, and it is sufficient if the voltage can be adjusted to a predetermined voltage in which the water particles can be charged. Is. The polarity (positive / negative) of the applied voltage is switched by the polarity switching unit. It should be noted that each of the above voltage values is an example, and the present invention is not limited to these, and a pulse voltage, a pulsating current voltage, and an AC voltage may be applied.

For example, when a DC voltage is applied between the induction electrode unit 60 and the water side electrode unit 62, it depends on the polarity of the induction electrode unit 60 when the water side electrode unit 62 reference potential (earth potential, 0V) is used. Therefore, charged water particles having either a positive charge or a negative charge are generated. Here, the potential of the induction electrode portion 60 becomes negative (minus) with the water side electrode portion 62 as the reference potential (earth potential, 0V), and the applied voltage for positively charging the water particles is applied negative (minus). With the voltage and water side electrode portion 62 as the reference potential (earth potential, 0V), the potential of the induction electrode portion 60 becomes positive (plus), and the applied voltage that charges the water particles negatively (minus) is the positive (plus) applied voltage. And. Further, when the voltage applied between the induction electrode portion 60 and the water side electrode portion 62 is set to, for example, in the range of 0.5 kV to 20 kV, the generation of spark discharge is prevented and the charged water particles are charged while ensuring safety. A spray stream is generated.

The configuration and structure of the charged fine spray head 32 are arbitrary and are not limited to FIG. 3, and an appropriate structure or a known structure that generates water particles and charges the generated water particles to generate charged water particles. Is included.

[Discharge direction adjustment unit]
The discharge direction adjusting unit provided in the spray airflow discharge unit 10 will be described in more detail. The discharge direction adjusting unit adjusts the discharge direction of the charged fine spray airflow 12 by the spray airflow discharge unit 10, and its configuration and structure are arbitrary, but as an example, as shown in FIG. 2, left-right direction adjustment. A portion 44 and a vertical adjustment portion 48 are provided.

The blower portion 28 of the spray airflow discharge portion 10 is vertically (vertically) by the vertical rotation shaft 50 to the rotation support portion 42 rotatably supported in the left-right direction (horizontal rotation) by the left-right rotation shaft 46 on the gantry 40. It is rotatably supported around). A left-right direction adjusting portion 44 is arranged on the lower side of the gantry 40. The left-right direction adjusting unit 44 is, for example, a motor drive unit, and a rotation support unit 42 is pivotally supported by a drive shaft, and a spray airflow discharge unit 10 pivotally supported by a vertical rotation shaft 50 is rotated left and right by the rotation support unit 42. The left and right discharge directions of the charged fine spray airflow 12 can be adjusted by rotating in the left-right direction (horizontally) about the shaft 46.

A vertical direction adjusting portion 48 is provided on one side of the vertical rotating shaft 50 that rotatably supports the spray airflow discharging portion 10 on the rotating support portion 42. The vertical direction adjusting unit 48 is, for example, a motor drive unit, the blower unit 28 is pivotally supported on the drive shaft, and the spray airflow discharge unit 10 is rotated in the vertical direction (vertical rotation) around the vertical rotation shaft 50 to be charged finely. The vertical emission direction of the spray airflow 12 can be adjusted.

Here, the left-right rotation shaft 46 of the left-right direction adjustment unit 44 and the up-down rotation shaft 50 of the up-down direction adjustment unit 48 are arranged at predetermined positions on the front side (discharge side) from the position of the center of gravity of the spray airflow discharge unit 10. Therefore, the discharge direction is stable even when the reaction force of the charged fine spray airflow 12 discharged by the spray airflow discharge unit 10 is received, and the discharge direction can be easily adjusted at the will of the operator. Further, for example, when the spray airflow discharge unit 10 is installed in the bucket portion provided at the tip of the ladder of the ladder fire engine, the stability of the spray airflow discharge unit 10 even when the basket portion is tilted. Because of the high value, it is possible to prevent the emission of the charged fine spray airflow from going in an unexpected direction, and it can be operated safely.

[High voltage power supply]
The high voltage power supply unit 18 will be described in more detail. The high-voltage power supply unit 18 supplies a high voltage for generating charged water particles to the spray airflow discharge unit 10 by a high-voltage cable 24, and its configuration and function are arbitrary, but as shown in FIG. 4, for example. In addition, a high voltage variable circuit 66 that functions as a voltage adjusting unit and a repolarization circuit 68 that functions as a polarity switching unit are provided.

Here, FIG. 4 shows the high-voltage power supply unit 18 together with the circuit configuration of the charged water particle generation unit 30 provided with the plurality of charged fine spray heads 32. The charged fine spray head 32 includes an induction electrode unit 60 and a water side electrode unit 62, and a voltage application cable 24a is connected from the high voltage power supply unit 18 to the induction electrode unit 60 via a current limiting resistor 72, and the high voltage power supply unit 18 is also provided. The ground cable 24b is connected to the water side electrode portion 62 via the current limiting resistor 74, a high voltage is applied between the induction electrode portion 60 and the water side electrode portion 62, and water sprayed from the charged fine spray head 32. Charges the particles. Here, the voltage application cable 24a and the ground cable 24b use a withstand voltage cable having high insulation, but when only a DC voltage is applied, the cable on the positive electrode side is used as the withstand voltage cable, and the cable on the negative electrode side is a normal low voltage cable. A cable is fine.

The high voltage variable circuit 66 adjusts the voltage applied between the induction electrode unit 60 and the water side electrode unit 62 according to the control signal from the control unit 21 of the operation panel 14, whereby the charge is fine. From the spray head 32, a charged fine spray air stream containing water particles having a charged amount suitable for extinguishing a fire or smoke at a fire site can be introduced. In addition, by reducing the absolute value of the applied voltage to reduce the amount of charge, the discharge that may occur due to the increase in the amount of charge due to the charged water particles with respect to the fire extinguishing target or fire prevention target that is easily charged. It makes it possible to prevent accidents.

The repolarization circuit 68 switches the polarity of the voltage applied between the induction electrode unit 60 and the water side electrode unit 62 in response to the control signal from the control unit 21 of the operation panel 14, whereby the charge is fine. The charging polarity of the water particles sprayed from the spray head 32 is switched to positive (plus) or negative (minus), and a charged fine spray airflow containing water particles having a charging polarity suitable for fire extinguishing or smoke extinguishing at a fire site is input. be able to. For example, when the fire extinguishing target or the fire prevention target is charged or easily charged, a charged fine spray airflow containing charged water particles having a polarity opposite to the polarity of the charge is introduced to achieve higher fire extinguishing performance. And smoke extinguishing performance can be expected.

Here, as the types of voltage applied from the high voltage power supply unit 18 between the induction electrode unit 60 of the charged fine spray head 32 and the water side electrode unit 62, for example, a DC voltage, a pulse voltage, a pulsating current voltage, and an alternating current are used. Examples include voltage.

[When applying DC voltage]
First, a case where a DC voltage is applied from the high voltage power supply unit 18 between the induction electrode unit 60 of the charged fine spray head 32 and the water side electrode unit 62 will be described in more detail.

The high voltage variable circuit 66 adjusts the voltage output from the high voltage variable circuit 66 to a predetermined DC voltage according to the control signal from the control unit 21 of the operation panel 14. The term "adjusting to a predetermined DC voltage" here means adjusting to a DC voltage capable of charging water particles, for example, 0.5 kV, which is a voltage range in which water particles can be charged. It is to adjust to the DC voltage of the voltage selected from the range of about 20 kV (+0.5 kV to +20 kV or −0.5 kV to −20 kV).

The repolarization circuit 68 determines whether or not to switch the polarity of a predetermined DC voltage adjusted and output by the high voltage variable circuit 66 according to the control signal from the control unit 21 of the operation panel 14, and determines whether or not to switch the polarity of the predetermined DC voltage. The polarity of the DC voltage applied between the 60 and the water side electrode portion 62 is adjusted.

For example, when the predetermined DC voltage is adjusted to a DC voltage (positive DC voltage) of +10 kV in the high voltage variable circuit 66 and the polarity is not switched in the repolarization circuit 68, the water side electrode portion 62 is set to the reference potential. As (earth potential, 0V), the potential of the induction electrode portion 60 becomes + 10kV, and the potential of the induction electrode portion 60 becomes higher than the potential of the water side electrode portion 62. The DC voltage (positive DC voltage) of +10 kV is the induction electrode portion. It is applied between the 60 and the water side electrode portion 62. As a result, the sprayed water particles are negatively charged.

On the other hand, when the predetermined DC voltage is adjusted to a DC voltage (positive DC voltage) of +10 kV by the high voltage variable circuit 66 and the polarity is switched by the repolarization circuit 68, the water side electrode portion 62 is set to the reference potential ( As the earth potential (0V), the potential of the induction electrode unit 60 becomes -10kV, and the potential of the induction electrode unit 60 becomes lower than the potential of the water side electrode unit 62. The DC voltage (negative DC voltage) of -10kV is the induction electrode. It is applied between the portion 60 and the water side electrode portion 62. As a result, the sprayed water particles are positively charged.

Here, the output of the control signal for switching the polarity from the control unit 21 of the operation panel 14 to the pole turning circuit 68 may be an output by manual operation such as when the operation display unit 20 of the operation panel 14 is operated, or in advance. This includes both cases of automatic output, such as when a predetermined cycle set in the fire extinguishing device is followed. That is, in the case of output by manual operation, the polarity of the DC voltage applied between the induction electrode unit 60 and the water side electrode unit 62 can be switched at any timing, and it is automatically performed when a predetermined cycle is followed. In the case of output, the polarity of the DC voltage applied between the induction electrode unit 60 and the water side electrode unit 62 can be switched at a preset timing.

Further, the repolarization circuit 68 may be controlled so that the high voltage variable circuit 66 is adjusted to a DC voltage having the opposite polarity and output without switching the polarity in the repolarization circuit 68. For example, if the high voltage variable circuit 66 is adjusted to a DC voltage of + 10 kV (positive DC voltage) and output, the high voltage variable circuit 66 outputs a DC voltage of -10 kV (negative DC voltage). To control.

[When applying pulse voltage]
Subsequently, a case where a pulse voltage is applied between the induction electrode portion 60 of the charged fine spray head 32 and the water side electrode portion 62 from the high voltage power supply unit 18 will be described in more detail.

The high voltage variable circuit 66 adjusts the voltage output from the high voltage variable circuit 66 to a predetermined pulse voltage according to the control signal from the control unit 21 of the operation panel 14. "Adjusting to a predetermined pulse voltage" here means the voltage of the pulse voltage by, for example, adjusting the pulse period, the pulse width (or the duty ratio indicating the ratio of the pulse width to the pulse period), the pulse amplitude, and the pulse polarity. It is to adjust the waveform. It should be noted that any parameter other than the above-mentioned parameters can be appropriately used as long as it is a parameter necessary for adjusting the voltage waveform.

Further, "adjustment of pulse polarity" here means that, for example, a unipolar pulse swinging to one polar side and a unipolar pulse swinging in both polar directions are selected, and the unipolar pulse is positive (plus). It includes a positive unipolar pulse swinging to the side and a negative unipolar pulse swinging to the negative (minus) side.

The voltage waveform of the pulse voltage adjusted by the high voltage variable circuit 66 is arbitrary. For example, as shown in FIG. 5A, the pulse period is T, the pulse width is T1, the pulse amplitude is V1, and a positive unipolar pulse. It is a voltage waveform adjusted as. Here, the pulse amplitude V1 may be any pulse amplitude as long as a voltage capable of charging the water particles can be applied between the induction electrode portion 60 and the water side electrode portion 62. For example, the water particles may be charged. The voltage shall be the same as the voltage selected from the range of 0.5 kV to 20 kV, which is the voltage range in which the particles can be generated.

Further, the pulse cycle T is arbitrary. For example, the voltage waveform of the pulse voltage shown in FIG. 5 (B) is a pulse whose cycle is doubled with respect to the pulse cycle T of the voltage waveform of the pulse voltage of FIG. 5 (A). It is adjusted as a period 2T.

Further, the pulse width T1 is arbitrary as long as it does not exceed the period T. For example, the voltage waveform of the pulse voltage in FIG. 5 (C) is 50 of the pulse period T of the voltage waveform of the pulse voltage in FIG. 5 (A). The pulse width T1 is adjusted to 75% of the pulse period T as the pulse width T2 (= 3T / 4).

Further, instead of adjusting the pulse width itself, the pulse width may be adjusted by adjusting the duty ratio indicating the ratio of the pulse width to the pulse period. The duty ratio in the voltage waveform of the pulse voltage of FIG. 5 (A) is 50%, the duty ratio in the voltage waveform of the pulse voltage of FIG. 5 (C) is 75%, and the duty ratio is between 0% and 100%. Can be adjusted at any rate.

Further, the pulse polarity swings to the negative (minus) side as shown in FIG. 5 (D) with respect to the pulse voltage adjusted as a positive unipolar pulse swinging to the positive (plus) side as shown in FIG. 5 (A). It may be a pulse voltage adjusted as a negative unipolar pulse or a pulse voltage adjusted as a bipolar pulse swinging in both polar directions as shown in FIGS. 5 (E) and 5 (F). When adjusting as a bipolar pulse as shown in FIG. 5 (E), the pulse width of the pulse swinging to the positive (plus) side is treated as T1, and the pulse width of the pulse swinging to the negative (plus) side is T-. Let T1 be used, and the ratio of the pulse width of the pulse swinging to the positive (plus) side to the pulse period is treated as the duty ratio.

The repolarization circuit 68 determines whether or not to switch the polarity of a predetermined pulse voltage adjusted and output by the high voltage variable circuit 66 according to the control signal from the control unit 21 of the operation panel 14, and determines whether or not to switch the polarity of the predetermined pulse voltage. The polarity of the pulse voltage applied between the 60 and the water side electrode portion 62 is adjusted.

As an example of a unipolar pulse, when the high voltage variable circuit 66 is adjusted to the pulse voltage of the voltage waveform of FIG. 5 (A) and the polarity is not switched by the repolarization circuit 68, the water side electrode portion 62 is used as a reference. As the potential (earth potential, 0V), the potential of the induction electrode portion 60 becomes + V1, and the positive voltage (+ V1) at which the potential of the induction electrode portion 60 becomes higher than the potential of the water side electrode portion 62 is the induction electrode portion 60 and water. The water particles sprayed between the side electrode portion 62 and the applied period (between t0 and t1) are negatively charged, and the voltage between the induction electrode portion 60 and the water side electrode portion 62 is 0V. The water particles sprayed during the period (between t1 and t2) are not charged, and these two periods (between t0 and t2) are repeated as one cycle.

On the other hand, when the high voltage variable circuit 66 is adjusted to the pulse voltage of the voltage waveform shown in FIG. 5A and the polarity is switched by the repolarization circuit 68, the water side electrode portion 62 is set to the reference potential (earth potential, 0V). ), The potential of the induction electrode portion 60 becomes −V1, and the negative voltage (−V1) at which the potential of the induction electrode portion 60 becomes lower than the potential of the water side electrode portion 62 is the induction electrode portion 60 and the water side electrode portion 62. The water particles sprayed during the period applied between and (t0 to t1) are positively charged, and the voltage between the induction electrode portion 60 and the water side electrode portion 62 is 0V (during the period (between t0 and t1)). The water particles sprayed between t1 and t2) are not charged, and these two periods (between t0 and t2) are repeated as one cycle.

Further, as an example of the bipolar pulse, when the high voltage variable circuit 66 is adjusted to the pulse voltage of the voltage waveform of FIG. 5 (E) and the polarity is not switched by the repolarization circuit 68, the water side electrode portion 62 is used. As the reference potential (earth potential, 0V), the potential of the induction electrode portion 60 becomes + V1, and the positive voltage (+ V1) at which the potential of the induction electrode portion 60 becomes higher than the potential of the water side electrode portion 62 is the induction electrode portion 60. The water particles sprayed between the water side electrode portion 62 and the applied period (between t0 and t1) are negatively charged, and the water side electrode portion 62 is induced as a reference potential (earth potential, 0V). A negative voltage (-V1) at which the potential of the electrode portion 60 becomes −V1 and the potential of the induction electrode portion 60 becomes lower than the potential of the water side electrode portion 62 is between the induction electrode portion 60 and the water side electrode portion 62. The water particles sprayed during the period (between t1-t2) applied to the are positively charged, and these two periods (between t0-t2) are repeated as one cycle. Further, when the polarity is switched in the repolarization circuit 68, the period in which the water particles are negatively charged and the period in which the water particles are positively charged are switched.

When the pulse voltage is ambivalent and the duty ratio is adjusted to 50% in the voltage waveform of FIG. 5 (E), or when the voltage waveform of FIG. 5 (F) is adjusted, the polarity is changed in the repolarization circuit 68. Since the switched voltage waveform is only a voltage waveform obtained by delaying the voltage waveform before the polarity switching in the repolarization circuit 68 by half a cycle or one cycle, before and after the switching in the repolarization circuit 68 in this way. If the waveforms have the same waveforms due to the phase shift, the polarity switching in the repolarization circuit 68 may not be performed.

Further, as in the case of applying a DC voltage, the output of the control signal for switching the polarity from the control unit 21 of the operation panel 14 to the repolarization circuit 68 is, for example, when the operation display unit 20 of the operation panel 14 is operated. Both the output by manual operation such as, and the automatic output when following a predetermined cycle set in the fire extinguishing device in advance are included, and the pole turning circuit 68 does not switch the polarity in the turning pole circuit 68. The high voltage variable circuit 66 may be controlled so as to be adjusted to a pulse voltage having the opposite polarity and output.

[When applying pulsating voltage]
Subsequently, a case where a pulsating current voltage is applied between the induction electrode portion 60 of the charged fine spray head 32 and the water side electrode portion 62 from the high voltage power supply unit 18 will be described in more detail.

The high voltage variable circuit 66 adjusts the voltage output from the high voltage variable circuit 66 to a predetermined pulsating current voltage according to the control signal from the control unit 21 of the operation panel 14. The term "adjusting to a predetermined pulsating current voltage" as used herein means adjusting the voltage waveform of the pulsating current voltage by, for example, adjusting the pulsating current waveform, the pulsating current cycle, and the pulsating current amplitude. It should be noted that any parameter other than the above-mentioned parameters can be appropriately used as long as it is a parameter necessary for adjusting the voltage waveform.

Further, the "adjustment of the pulsating current waveform" here means that it is sufficient if the waveform can be adjusted so that the magnitude of the voltage changes periodically without changing the polarity of the output voltage. For example, a full-wave rectified wave or a half wave. It includes selecting from a predetermined waveform type such as a wave rectified wave, a square wave, and a triangular wave.

The voltage waveform of the pulsating voltage adjusted by the high voltage variable circuit 66 is arbitrary, but as shown in FIG. 6, for example, the pulsating period is T3, the pulsating amplitude is V2, and a positive (plus) full-wave rectified wave is used. It is a tuned voltage waveform. Here, the pulsating current amplitude V2 is an arbitrary pulsating current amplitude as long as a voltage capable of charging water particles in a predetermined period within one cycle can be applied between the induction electrode portion 60 and the water side electrode portion 62. V1 may be used, but the voltage may be the same as the voltage selected from the range of 0.5 kV to 20 kV, which is a voltage range in which water particles can be charged. As a result, the voltage changes in the range of 0 to + V2 (-V2 to 0 when the polarity is switched), so that a voltage capable of charging the water particles is applied for a predetermined period within one cycle. .. Further, the pulsating current cycle T3 is arbitrary.

The repolarization circuit 68 determines whether or not to switch the polarity of a predetermined pulsating current voltage adjusted and output by the high voltage variable circuit 66 in response to a control signal from the control unit 21 of the operation panel 14, and determines whether or not to switch the polarity of the predetermined pulsating voltage. The polarity of the pulsating current voltage applied between the portion 60 and the water side electrode portion 62 is adjusted.

For example, when the high voltage variable circuit 66 is adjusted to the pulsating voltage of the voltage waveform of FIG. 6 and the polarity is not switched by the repolarization circuit 68, the water side electrode portion 62 is set to the reference potential (earth potential, 0V). As a result, the potential of the induction electrode unit 60 changes in the range of 0 to + V2, and the positive voltage (0 to + V2) applied between the induction electrode unit 60 and the water side electrode unit 62 also changes, and the sprayed water The amount of negative charge of the particles changes.

On the other hand, when the high voltage variable circuit 66 is adjusted to the pulsating voltage of the voltage waveform of FIG. 6 and the polarity is switched by the repolarization circuit 68, the water side electrode portion 62 is set as the reference potential (earth potential, 0V). The potential of the induction electrode portion 60 changes in the range of −V2 to 0, and the negative voltage (−V2 to 0) applied between the induction electrode portion 60 and the water side electrode portion 62 also changes and is sprayed. The positive charge amount of the water particles changes.

Further, as in the case of applying a DC voltage, the output of the control signal for switching the polarity from the control unit 21 of the operation panel 14 to the repolarization circuit 68 is, for example, when the operation display unit 20 of the operation panel 14 is operated. Both the output by manual operation such as, and the automatic output when following a predetermined cycle set in the fire extinguishing device in advance are included, and the pole turning circuit 68 does not switch the polarity in the turning pole circuit 68. The high voltage variable circuit 66 may be controlled so as to be adjusted to a pulsation voltage of the opposite polarity and output.

[When applying AC voltage]
Subsequently, a case where an AC voltage is applied between the induction electrode portion 60 of the charged fine spray head 32 and the water side electrode portion 62 from the high voltage power supply unit 18 will be described in more detail.

The high voltage variable circuit 66 adjusts the voltage output from the high voltage variable circuit 66 to a predetermined AC voltage according to the control signal from the control unit 21 of the operation panel 14. The term "adjusting to a predetermined AC voltage" here means adjusting the voltage waveform of the AC voltage by, for example, adjusting the AC waveform, the AC cycle, and the AC amplitude. It should be noted that any parameter other than the above-mentioned parameters can be appropriately used as long as it is a parameter necessary for adjusting the voltage waveform.

Further, the term "adjustment of AC waveform" as used herein means that the polarity of the output voltage and the magnitude of the voltage can be adjusted to a waveform that changes periodically, for example, sinusoidal AC, square wave AC, and triangular wave. It includes selecting from a fixed waveform type such as alternating current.

The AC voltage adjusted by the high voltage variable circuit 66 is arbitrary, but is, for example, a voltage waveform adjusted as an AC cycle of T4, an AC amplitude of V3, and a sinusoidal AC shown in FIG. 7. Here, the AC amplitude V3 is an arbitrary AC amplitude V3 as long as a voltage capable of charging the water particles in a predetermined period within one cycle can be applied between the induction electrode portion 60 and the water side electrode portion 62. However, for example, the voltage is the same as the voltage selected from the range of 0.5 kV to 20 kV, which is the voltage range in which water particles can be charged. As a result, the voltage changes in the range of −V3 to + V3, so that a voltage capable of charging the water particles is applied for a predetermined period of one cycle. Further, the AC cycle T4 is arbitrary.

The repolarization circuit 68 determines whether or not to switch the polarity of a predetermined AC voltage adjusted and output by the high voltage variable circuit 66 according to the control signal from the control unit 21 of the operation panel 14, and determines whether or not to switch the polarity of the predetermined AC voltage. The polarity of the AC voltage applied between the 60 and the water side electrode portion 62 is adjusted.

For example, when the high voltage variable circuit 66 is adjusted to the AC voltage of the voltage waveform of FIG. 7 and the polarity is not switched by the repolarization circuit 68, the water side electrode portion 62 is set as the reference potential (earth potential, 0V). The period (between t3-t4) in which the potential of the induction electrode unit 60 changes in the range of 0 to + V3 and the positive voltage (0 to + V3) applied between the induction electrode unit 60 and the water side electrode unit 62 changes. ) Changes the negative (minus) charge amount of the water particles sprayed, and the potential of the induction electrode portion 60 changes in the range of −V3 to 0 with the water side electrode portion 62 as the reference potential (earth potential, 0V). , Positive (plus) charge of water particles sprayed during the period (between t4-t5) where the negative voltage (-V3 to 0) applied between the induction electrode portion 60 and the water side electrode portion 62 changes. The amount changes.

On the other hand, when the high voltage variable circuit 66 is adjusted to the pulsating voltage of the voltage waveform of FIG. 7 and the polarity is switched by the repolarization circuit 68, the water side electrode portion 62 is set as the reference potential (earth potential, 0V). The period (t3-) in which the potential of the induction electrode portion 60 changes in the range of −V3 to 0 and the negative voltage (−V3 to 0) applied between the induction electrode portion 60 and the water side electrode portion 62 changes. The positive (plus) charge amount of the water particles sprayed during t4) changes, and the potential of the induction electrode portion 60 changes in the range of 0 to + V3 with the water side electrode portion 62 as the reference potential (earth potential, 0V). Then, the period (between t4-t5) in which the positive voltage (0 to + V3) applied between the lead electrode portion 60 and the water side electrode portion 62 changes in response to the change in the potential of the lead electrode portion 60. The amount of negative charge of the water particles sprayed by is changed.

The voltage waveform whose polarity is switched in the repolarization circuit 68 is only a voltage waveform in which the voltage waveform before the polarity switching in the repolarization circuit is delayed by half a cycle, and the waveform before and after the switching in the repolarization circuit 68 is Since the same waveform can be obtained by shifting the phase, it is possible not to switch the polarity in the repolarization circuit 68.

Further, as in the case of applying a DC voltage, the output of the control signal for switching the polarity from the control unit 21 of the operation panel 14 to the repolarization circuit 68 is, for example, when the operation display unit 20 of the operation panel 14 is operated. Both the output by manual operation such as, and the automatic output when following a predetermined cycle set in the fire extinguishing device in advance are included, and the pole turning circuit 68 does not switch the polarity in the turning pole circuit 68. The high voltage variable circuit 66 may be controlled so as to be adjusted to an AC voltage having the opposite polarity and output.

The above has described the case where the applied voltage is a DC voltage, a pulse voltage, a pulsating current voltage, and an AC voltage, but the type of the applied voltage is not limited to these.

When applying a pulse voltage, a pulsating current voltage, and an AC voltage, for example, by a method of amplifying a voltage waveform (about ± several V) generated by a function generator with a high voltage amplifier capable of amplifying in the order of kV. It can be realized.

[Fire extinguishing agent supply unit]
The fire extinguishing agent supply unit 16 shown in FIG. 1 will be described in more detail. The fire extinguishing agent supply unit 16 supplies fire extinguishing water to the spray air flow discharge unit 10, and the configuration and structure thereof are arbitrary, but as an example, the fire extinguishing device of the present embodiment is mounted on a ladder fire truck. Therefore, the fire extinguishing agent supply unit 16 is composed of a pressurized water supply device or a pressurized water supply facility including a fire extinguishing pump provided in the fire extinguishing vehicle. The water source in this case includes a water tank mounted on a fire engine and a fire hydrant connected to a hose. Further, the fire extinguishing agent supply unit 16 operates by operating the operation panel 14 to start or stop the water discharge to supply and stop the fire extinguishing water.

Further, the water pipe 22 from the fire extinguishing agent supply unit 16 is branched at the connection portion of the spray airflow discharge unit 10 and is connected to a plurality of charged fine spray heads 32 provided in the charged water particle generation unit 30. Further, the water pipe 22 is provided with a known telescopic piping structure that expands and contracts according to the length of the ladder in the ladder portion of the ladder fire engine.

[Operation board]
The operation panel 14 shown in FIG. 1 will be described in more detail. The operation panel 14 is for the operator to operate the fire extinguishing device of the present embodiment, and the operation content is arbitrary, but as an example, the start / stop operation of the spray airflow discharge unit 10 and the charge from the spray airflow discharge unit 10 are performed. The operation of adjusting the emission direction of the fine spray flow 12, selection of the type of voltage to be applied by the high-voltage power supply unit 18, operation of voltage adjustment and polarity switching, and the like are included.

The operation panel 14 is provided with an operation display unit 20 and a control unit 21. The operation display unit 20 is provided with various operation buttons, operation levers, displays, indicator lights, etc. necessary for remote control of the spray airflow discharge unit 10. The control unit 21 outputs a control signal based on the operation of the operator by the operation display unit 20 and controls the spray air flow emission unit 10. The function and configuration thereof are arbitrary, but for example, a CPU and a memory. , It is composed of a computer circuit provided with various input / output ports and the like, and a predetermined control function is realized by executing a program by a CPU.

[Ladder fire engine equipped with fire extinguishing device]
The fire extinguishing by the ladder fire engine equipped with the fire extinguishing device of this embodiment will be described in more detail. FIG. 8 is an explanatory diagram showing an example of fire extinguishing work by a ladder fire engine equipped with the fire extinguishing device of the present embodiment at a fire site. As shown in FIG. 8, the ladder fire engine 76 is equipped with the fire extinguishing device of the present embodiment. The operation panel 14, the fire extinguishing agent water supply unit 16, and the high-pressure power supply unit 18 are provided on the ladder fire engine 76 side.

For example, if a fire breaks out on the third floor of the building 82, the ladder fire engine 76 arriving at the fire site will bring the spray airflow discharge unit 10 provided in the basket 80 closer to the outer wall opening such as the window of the building. Extend the ladder 78. Subsequently, by operating the discharge start operation by operating the operation panel 14, fire extinguishing water is supplied from the fire extinguishing agent water supply unit 16 to the spray airflow discharge unit 10, and a high voltage is supplied from the high voltage power supply unit 18 to the spray airflow discharge unit 10. Is applied, and further, the blower unit 28 is activated by the control signal from the operation panel 14. As a result, the charged fine spray airflow 12 containing the charged water particles sprayed from the charged fine spray head 32 in the air flow from the blower unit 28 is discharged toward the fire compartment 82.

At this time, the operator adjusts the direction of the charged fine spray airflow 12 up and down and or left and right by remote control of the operation panel 14, and inputs the charged fine spray airflow 12 toward the fire section 84. In addition, the operator adjusts the applied voltage and switches the voltage polarity by the high-voltage power supply unit 18 based on the situation of fire extinguishing and smoke extinguishing by turning on the charged fine spray airflow 12, and is suitable for fire extinguishing and smoke extinguishing at the fire site. A charged fine spray airflow 12 containing water particles having a charged amount and a charging polarity is introduced into the fire section 84 to extinguish or prevent a fire.

[Modified example of the present invention]
(Fire engine)
The above embodiment takes the case where a fire extinguishing device is mounted on a ladder fire engine, but any fire engine capable of approaching the spray airflow discharge unit 10 from the outside to a fire section which is a high place of a building. If so, it does not prevent it from being installed in an appropriate fire engine. For example, in the case of an aerial work platform, the spray airflow discharge unit 10 may be provided on the aerial work platform, and in the case of a fire engine with a boom, the spray airflow discharge unit 10 may be provided at the tip of the boom. Further, the spray airflow discharging unit 10 may be mounted on the track self-propelled vehicle, and may be moved to a fire section inaccessible to humans by remote control to inject the charged fine spray airflow.

(High voltage supply unit)
In the above embodiment, when a voltage is applied from the high voltage power supply unit 18 to the induction electrode unit 60 and the water side electrode unit 62, voltage adjustment and polarity switching are possible, but the present invention is limited to this. However, it is optional, and for example, the applied voltage and / or the polarity may be fixed.

(others)
Further, the present invention is not limited to the above-described embodiment, includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above-described embodiment.

10: Spray air flow discharge unit 12: Charged fine spray air flow 14: Operation panel 16: Fire extinguishing agent supply unit 18: High-voltage power supply unit 20: Operation display unit 21: Control unit 22: Water supply pipe 24: High-voltage cable 26: Signal cable 28: Blower 30: Charged water particle generation unit 31: Support ring 32: Charged fine spray head 34: Axial flow fan 36: Fan motor 38: Protective cover 40: Stand 42: Rotating support unit 44: Left / right direction adjustment unit 46: Left / right Rotating shaft 48: Vertical adjustment part 50: Vertical rotating shaft 52: Center of gravity 54: Body 56: Injection nozzle part 58: Electrode holding part 60: Induction electrode part 62: Water side electrode part 64: Water supply connection part 66: High voltage variable Circuit 68: Polarization circuit 72, 74: Current limiting resistance 76: Ladder fire truck 78: Ladder 80: Basket 84: Fire compartment

Claims (8)

A fire extinguishing device characterized by discharging a charged fine spray air flow containing charged water particles in an air flow toward a fire extinguishing target or a fire prevention target.
A spray airflow discharging unit that discharges a charged fine spray airflow containing charged water particles in the airflow toward a fire extinguishing target or a fire prevention target.
A fire extinguishing agent supply unit that supplies fire extinguishing water to the spray airflow discharge unit,
A high-voltage power supply unit that supplies a high voltage for generating charged water particles to the spray airflow discharge unit, and
A discharge direction adjusting unit for adjusting the discharge direction of the charged fine spray airflow by the spray airflow discharge unit, and a discharge direction adjusting unit.
A fire extinguishing device characterized by being provided with.
In the fire extinguishing device according to claim 2,
The spray airflow emitting part is
The blower that generates the air flow and
A charged fine spray head that sprays and contains the charged water particles in the air flow generated by the blower.
A fire extinguishing device characterized by being equipped with.
In the fire extinguishing device according to claim 3,
The high voltage power supply unit
A voltage adjusting unit that adjusts the voltage applied to the charged fine spray head in response to the fire extinguishing target or the fire prevention target.
A polarity switching unit that switches the polarity of the voltage applied to the charged fine spray head according to the fire extinguishing target or the fire prevention target.
A fire extinguishing device characterized by being equipped with.
In the fire extinguishing device according to any one of claims 2 to 4.
The emission direction adjusting unit is
A vertical adjustment unit that adjusts the discharge direction of the charged fine spray airflow in the vertical direction,
A left-right direction adjusting unit that adjusts the discharge direction of the charged fine spray airflow in the left-right direction,
Equipped with
A fire extinguishing device characterized in that the rotation axis of the vertical direction adjustment section and the rotation axis of the left-right direction adjustment section are arranged at predetermined positions on the tip side of the center of gravity position of the spray air flow release section.
In the fire extinguishing device according to any one of claims 1 to 5.
The spray airflow discharging unit is a fire extinguishing device provided at the tip of a ladder of a ladder fire engine, an aerial work platform of an aerial work platform, or the boom tip of a fire engine with a boom.
A fire extinguishing method comprising a fire extinguishing device for discharging a charged microspray airflow containing charged water particles in an air flow toward a fire extinguishing target or a fire prevention target.
The spray airflow discharge unit discharges a charged fine spray airflow containing charged water particles in the airflow toward a fire extinguishing target or a fire prevention target.
The fire extinguishing agent supply unit supplies fire extinguishing water to the spray airflow discharge unit.
The high-voltage power supply unit supplies a high voltage for generating charged water particles to the spray airflow discharge unit.
The discharge direction adjusting unit adjusts the discharge direction of the charged fine spray airflow by the spray airflow discharge unit.
A fire extinguishing method characterized by that.

Images