JP7797758B2 - Mist generator - Google Patents

Description

The present invention relates to a mist generator that can spray mist in a concentrated forward direction without using a nozzle.

Conventionally, a sprinkler device has been known that has a circular water pipe arranged along the opening of a casing, and nozzles facing forward at equal intervals on the water pipe, from which water is sprayed forward.
Furthermore, Japanese Patent Application Laid-Open No. 2019-86276 discloses a mist generator comprising a cross-flow fan main body, a cross-flow fan drive motor, and a nozzle pipe inside an impeller of the cross-flow fan main body, wherein the cross-flow fan main body comprises a multi-blade impeller having a large number of curved blades on the outer periphery between a pair of disc-shaped impeller side plates, and a casing that houses the multi-blade impeller between an intake port and a discharge port, and the impeller has a motor drive shaft for the cross-flow fan drive motor connected to an impeller boss on the drive-side impeller side plate, and the impeller A mist generator is known in which an impeller hollow rotating shaft communicating with the interior of the casing is attached to the impeller side plate opposite the drive side and is held by an impeller bearing installed on the side plate of the casing, a nozzle pipe having a plurality of nozzles on its circumferential surface is held by the impeller hollow rotating shaft, and the tip of the nozzle pipe having a plurality of nozzles extends into the interior of the impeller, and liquid supplied to the nozzle pipe is sprayed into the impeller from the nozzles of the nozzle pipe, generating mist.

In the above configuration, high-pressure fluid is supplied to a nozzle pipe, perforated pipe, or pipe-shaped nozzle inserted into the impeller of the cross-flow fan and ejected from the nozzle into the impeller while rotating. This reduces pressure, diffuses, and mixes with the flow inside the impeller, creating an atomized mist flow that is then ejected from the cross-flow fan into the space. The latent heat of vaporization of the mist can be used to cool specific wide, long spaces such as event venues, sports facilities, and factories. However, this configuration has the disadvantage of being complex in structure and unable to spray the mist over long distances.

JP 2019-86276 A

The problem this invention aims to solve is that, without using a nozzle, the mist is concentrated forward and sprayed farther away using a fan, making it possible to generate a uniform mist over a wide area.

In order to solve the above problems, the present invention provides a first aspect of the present invention,
The casing has an air intake port on the rear surface thereof and an air outlet port on the front surface thereof, and a fan that is driven by a motor to rotate and send air from the intake port to the air outlet port is provided.
a water supply unit fixed to a front side in the casing and supplying water;
a cylindrical shaft portion that is installed in the center of the water supply portion and is rotated by a motor;
a cylindrical portion fitted onto the shaft portion with a uniform gap therebetween, forming a water passage of uniform width between the cylindrical portion and the shaft portion;
The air intakes are arranged at equal intervals around an axis extending vertically from the intake port on the back surface of the casing to the air outlet port of the casing along the outer periphery of the cylindrical portion, and
A group of small holes arranged vertically on the same line to discharge water from the waterway;
an outer cylindrical portion having a top plate portion fixed at the center on the air outlet side, which is the front end of the protrusion of the shaft portion, and fitted to the cylindrical portion with a uniform gap therebetween, and rotating about the axis;
The fan is characterized by comprising a group of long holes arranged at equal intervals around the axis along the outer periphery of the outer cylinder, which spray water ejected from the group of small holes into mist and then through the group of long holes into the casing, and which sprays the mist forward from the outlet of the casing as the fan rotates.
In the invention of claim 2,
The motor is characterized in that it comprises a first motor and a second motor, the first motor driving the fan to rotate, and the second motor driving the shaft to rotate.

Mist is generated in front of the casing without using a nozzle, and the dense mist is sprayed forward by a fan, which helps reduce dust generation at demolition sites, fires caused by waste materials, and odors.

FIG. 2 is a side view showing an outline of the mist generating device. FIG. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the mist generating device of the present invention will now be described with reference to the drawings.
As shown in FIG. 1, the mist generating device 20 has a casing 1 pivotally attached at its left and right ends to a pair of arms 22 fixed to a support base 21, so that the casing 1 can be tilted freely.

The casing 1 is generally cylindrical and extends in the front-rear direction, has an air intake port 2 on the rear surface, and is covered in a lattice pattern.
On the other hand, the front surface of the casing 1 is open all over and forms an air outlet 3 .
The air inlet 2 side has a large diameter opening so that a large fan 4 can be housed therein, and the air outlet 3 has a small diameter opening.

A first motor M1 is fixed to the middle of the casing 1, with its rotating shaft protruding rearward along the axis of the casing 1 and connected to the rotating shaft of the axial flow fan 4. By rotating the fan 4, air can be blown from the intake 2 to the outlet 3.

A water supply unit 5 for supplying water is provided in front of the first motor M1.
The water supply section 5 has a recessed portion and is covered on the outer periphery, and a connection port 5b of a hose extending from a water line or other water source (not shown) is connected to the outer periphery wall to supply water.
A cylindrical shaft portion 6 is erected along the axis at the center of the water supply portion 5 and is rotated in one direction by a second motor M2 fixed to the rear of the water supply portion 5.

A cylindrical portion 7, which is open at the front and rear, is fitted onto the shaft portion 6 with a small gap of uniform width therebetween, forming a water passage 5a of uniform width between the shaft portion 6 and the cylindrical portion 7.
The outer peripheral surface of the cylindrical portion 7, which forms the outer wall, is provided with a group of small holes 8, which are arranged at equal intervals around the axis and on the same line extending parallel to the axis, and which are arranged in multiple numbers to discharge water from the water channel 5a (see Figure 2).
In the illustrated example, the group of small holes 8 is composed of 12 rows around the outer periphery centered on the axis, with four small holes in each row, and water passes through the water channel 5a from the water supply section 5 and is ejected outward from the group of small holes 8 by the water pressure when water is supplied.

A small-diameter protrusion 6a is provided on the upper end of the shaft portion 6, and the top plate portion 9a of the outer cylindrical portion 9, which is fitted onto the cylindrical portion 7 with a uniform gap 7a between them, is fixed thereto, and is configured to rotate integrally with the shaft portion 6 around its axis.
The outer cylindrical portion 9 has a group of a plurality of elongated holes 10 formed along its outer peripheral wall at equal intervals about the axis and parallel to the axis.

In the illustrated example, the outer cylinder 9 has a diameter of about 118 mm, a total length of about 74 mm, and a total length from the outer cylinder 9 to the water supply part 5 of 129 mm.
Furthermore, the group of long holes 10 is composed of 40 to 50 rows around the outer periphery centered on the axis, with each row consisting of two long holes, but it goes without saying that the present invention is not limited to the above dimensions or number of holes.
The droplets of water ejected from the small holes 8 pass through the gap 7 a and are converted into mist by the long holes 10 in the outer cylinder 9 rotating at high speed, and are scattered into the space near the outlet 3 of the casing 1 .

In the first embodiment, the motor is composed of a first motor and a second motor, but in the present invention, only one motor may be used.
That is, although not shown, a configuration may be adopted in which the rotational force of one motor is transmitted to both the fan 4 and the shaft portion 6 to rotate them.

The mist thus formed is discharged in a concentrated manner forward from the outlet 3 by the air blown by the fan 4, so that the mist can be sprayed evenly.
In this embodiment, the case where water is sprayed in mist form is exemplified, but depending on the application, a water-soluble chemical may be used, for example, by mixing water with a fire extinguishing agent or a chemical such as a pesticide.
In addition, various design changes are possible within the scope of the present invention.

REFERENCE SIGNS LIST 1 Casing 2 Intake port 3 Outlet port 4 Fan 5 Water supply section 5a Water channel 6 Shaft section 7 Cylinder section 8 Small hole group 9 Outer cylinder section 9a Top plate section 10 Long hole group 20 Mist generating device M1 First motor M2 Second motor

Claims (2)

The casing has an air intake port on the rear surface thereof and an air outlet port on the front surface thereof, and a fan that is driven by a motor to rotate and send air from the intake port to the air outlet port is provided.
a water supply unit fixed to a front side in the casing and supplying water;
a cylindrical shaft portion that is installed in the center of the water supply portion and is rotated by a motor;
a cylindrical portion fitted onto the shaft portion with a uniform gap therebetween, forming a water passage of uniform width between the cylindrical portion and the shaft portion;
The air intakes are arranged at equal intervals around an axis extending vertically from the intake port on the back surface of the casing to the air outlet port of the casing along the outer periphery of the cylindrical portion, and
A group of small holes arranged vertically on the same line to discharge water from the waterway;
an outer cylindrical portion having a top plate portion fixed at the center on the air outlet side, which is the front end of the protrusion of the shaft portion, and fitted to the cylindrical portion with a uniform gap therebetween, and rotating about the axis;
The mist generating device comprises a group of long holes arranged at equal intervals around the axis along the outer periphery of the outer cylinder, which convert water ejected from the group of small holes into mist and scatter it through the group of long holes into the casing, and which sprays the mist forward in a concentrated manner from the outlet of the casing as the fan rotates. The mist generator of claim 1, characterized in that the motor comprises a first motor and a second motor, the first motor driving the fan to rotate, and the second motor driving the shaft to rotate.