JP2001027196A - Blast device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress noises by forming a blast device with a casing holding a motor having a fan, a front duct located on the blast side of the casing to blast air in the horizontal direction, and a suction duct located on the suction side of the casing to suck air only from above. SOLUTION: The blast section 23 of a blast device 22 comprises a casing 26 holding a motor 25 having a fan 24, a rear duct 27 located on the blast side in the front of the casing 26, a front duct 29 located in the front of the rear duct 27 and having a spit hole 28, and a suction duct 31 located on the suction side at the rear of the casing 26 and having a suction port 30 upward. Since the blast device 22 sucks air only from above via the suction duct 31, such noise as hissing sound generated when air is sucked is diffused upward, and noise can be suppressed for the ground portion located in the horizontal direction behind the suction duct 31.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower for suppressing noise.

[0002]

2. Description of the Related Art In a running test of a car, there is a test for examining a state of the car when a wind of a predetermined angle is received during running. In this test, as shown in FIG. This is performed using a plurality of large-sized blowers 3 (five in FIG. 5) arranged along the road surface 2 in the traveling direction of the automobile 1.

As shown in FIGS. 6 to 8, a blower unit 3 has a blower unit 4 standing on the ground 5. The blower unit 4 includes a rear duct 7 having a suction port 6 and a blowout port 8. And a front duct 9 formed narrow along the blowing direction to reduce the flow of wind.

[0004] The rear duct 7 is provided with four motors 11 to which a fan 10 is attached, and the outlet 8 of the front duct 9 is provided with drive louvers 12 arranged in the left-right direction. The drive louver 12 is provided with a drive louver motor (not shown) that changes the direction of the drive louver 12 so as to change the wind direction to the left and right.

When the air is blown from the blower 4, the drive louver 12 is changed to a predetermined left and right angle and fixed in advance.
, The air is sucked into the blower 4, rectified by the front duct 9, and blown by the drive louver 12 in the direction of a predetermined left and right angle.

FIGS. 9 to 1 show another example of a blower.
As shown in FIG. 1, there is one described in Japanese Patent Application No. 11-13255.

The blower 13 described in Japanese Patent Application No. 11-13255 has a blower 15 having substantially the same configuration as that of the blower as a fixed louver 14 for the drive louver of the blower. In the lower part, a frame 17 and wheels 18 combined in a square via a turntable 16
Is provided. In addition, a jack 20 that lifts the blower 13 in contact with the ground 5 is provided at an edge of the blower 15 near the inlet 6 and the outlet 8.

On the other hand, a rail 21 is provided on the ground 5 where the bogie 19 contacts the ground along the road surface 2 of the running test.
The rail 21 is buried in the ground 5 so that only the upper part is exposed.

When air is blown from the blower 13 at a predetermined angle in the left and right directions, as shown in FIG. 11, a plurality of blowers 13 (five in FIG. 11) mounted on the rails 21 are used.
The air blower 15 is moved along the rail 21 so as to have a predetermined interval with the adjacent blower 13, and the blower 15 is rotated by the turntable 16 so that the outlet 8 of the blower 15 is directed to the wind direction at a predetermined angle on the left and right sides. By 20, the blower 13 is lifted and fixed so that the cart 19 is separated from the rail 21 and supports the blower 15.

Next, air is sucked by the fan 10 of the motor 11 and taken into the air blower 15, and is blown from the air outlet 8 in the direction of a predetermined left and right angle.

Therefore, it is possible to prevent the pressure loss of the wind force generated when the left and right wind directions are changed by the drive louver, minimize the power loss, and suppress the increase in operating cost.

Further, a bogie 19 capable of running on the rail 21 via the turntable 16 is provided below the blower unit 15, so that air is blown from a proper position along the rail 21 in a direction at a predetermined left and right angle. be able to.

[0013]

However, the conventional blower 3 and the blower 13 described in Japanese Patent Application No. 11-13255 are located at the end of the site so as to make effective use of the land, and Is directed toward the road surface 2 and the suction port 6 is directed toward the outside of the premises, so that there is a problem that wind noise caused by the fan 10 is generated outside the premises. In addition, when a huge soundproof wall is provided to protect the noise level at the boundary of the site against the noise of wind noise, there is a problem that the installation cost is high due to the size of the soundproof wall, and the usability of the land is deteriorated. .

The present invention has been made in view of the above circumstances, and has as its object to provide a blower that suppresses noise.

[0015]

According to the present invention, there is provided an air blower comprising: a casing for holding a motor having a fan; a front duct positioned on the air blow side of the casing to blow air horizontally; and a suction side of the casing. And a suction duct that sucks air only from above.

When air is blown by the blower, air is sucked from above the suction duct by driving a motor having a fan, and is blown in a horizontal direction from a front duct through a casing.

As described above, in the blower, since the air is sucked only from above by the suction duct, the noise generated when the air is sucked is diffused upward, and the air is blown to the ground portion located horizontally behind the suction duct. On the other hand, noise can be suppressed.

Further, when the casing is inclined upward with respect to the horizontal plane, it is possible to suppress the power loss of the blower caused by the angle difference that changes the air taken in from above into the horizontal direction.

Further, when the angle of the axis of the casing is set to an angle of 30 ° or less upward with respect to the horizontal plane, the power loss of the blower caused by the angle difference for changing the air taken in from above into the horizontal direction is suppressed, and This prevents a load on the rotating shaft of the motor from hindering the operation of the blower, which is caused when the angle of the axis of the casing is larger than 30 ° upward with respect to the horizontal plane. Unbalanced balance can be suppressed.

Further, when the direction of the rotating shaft of the motor is set to the same direction as the axis of the casing, the direction in which air is sucked by the motor provided with the fan and the direction of air flowing through the casing substantially coincide with each other. Loss can be reduced.

[0021]

Embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a blower 22 showing an embodiment of the present invention, in which parts denoted by the same reference numerals as in FIGS. 5 to 11 represent the same parts. .

The blower 22 includes a blower 23 and the fan 2
A casing 26 for holding a motor 25 provided with a motor 4, a rear duct 27 located on the air blowing side in front of the casing 26, a front duct 29 located in front of the rear duct 27 and having an outlet 28, And a suction duct 31 provided with a suction port 30 above and located on the suction side behind 26.

The casing 26 is inclined such that the angle of the axis line 32 is 30 ° or less, preferably 10 ° to 20 °, with respect to the horizontal plane.

The motor 25 held in the casing 26 is one, and the direction of the rotation axis of the motor 25 is the same as the axis 32 of the casing 26.

Here, when the number of motors 25 attached to the casing 26 is four as shown in FIGS. 6 and 8 of the conventional example, the center of gravity of the blower 3 and the motor 25 is distorted due to the inclined arrangement of the motor 25. Blower 3 and motor 2
5, an extra load is applied, so that only one motor 25 is used.

The suction duct 31 has a sound absorbing material (not shown), such as a punch metal, which absorbs noise on its inner surface.

The rear duct 27 and the front duct 29 are combined so as to be horizontal from the inclined direction of the casing 26.

The outlet 28 of the front duct 29 is provided with a louver 33 for adjusting the direction in which the wind blows.

A turntable 3 is provided below the blower 23.
4, a bogie 37 including a frame 35 and wheels 36 combined in a square is provided.

At the front and rear edges of the blower 23, jacks 38 for lifting the blower 22 in contact with the ground 5 are provided.
It has.

On the other hand, a rail 39 is provided on the ground 5 where the bogie 37 touches the ground, along the road surface 2 of the running test.
The rail 39 is buried in the ground 5 so that only the upper part is exposed.

Next, the operation of the present embodiment will be described.

When air is blown from the blower 22 at a predetermined angle in the left and right directions, the plurality of blowers 22 mounted on the rail 39 are connected to the rail 39 so as to have a predetermined distance from the adjacent blower 22. Along with each other, the blower 23 is rotated by the turntable 34 so that the air outlet 28 of the blower 23 is directed to the wind direction at a predetermined left and right angle, and the bogie 37 is separated from the rail 39 by the jack 38 to support the blower 23. The blower 22 is lifted and fixed so as to perform the operation.

Next, by driving the fan 24 of the motor 25, air is sucked from above the suction port 30 of the suction duct 31 and taken into the suction duct 31, and the air is sucked into the casing 26 from the vertical direction of the suction duct 31. The direction is changed obliquely, and further, the direction is gradually changed in the horizontal direction from the oblique direction of the casing 26 by the rear duct 27 and the front duct 29, and air is blown from the outlet 28 of the front duct 29 to a direction at a predetermined left and right angle.

As described above, since the blower 22 sucks air only from above by the suction duct 31,
The noise such as the wind noise generated when inhaling the air is diffused upward, and the noise can be suppressed in the ground portion located horizontally behind the suction duct 31.

When the casing 26 is inclined upward with respect to the horizontal plane, the power loss of the air blower 22 caused by the angle difference that changes the air taken in from above into the horizontal direction can be suppressed.

Further, when the angle of the axis 32 of the casing 26 is set to an angle of 30 ° or less upward with respect to the horizontal plane, the power loss of the blower 22 caused by the angle difference for changing the air taken in from above into the horizontal direction is reduced. In addition to preventing the blower 22 from being disturbed due to the load on the rotating shaft of the motor 25, which is caused when the angle of the axis 32 of the casing 26 is larger than 30 ° upward with respect to the horizontal plane, The bias of the balance of the wind sent from the outlet 28 can be suppressed.

Further, when the angle of the axis 32 of the casing 26 is inclined upward by 10 ° to 20 ° with respect to the horizontal plane, the power loss of the blower 22 is suppressed and the blower 22 Both conflicting with prevention of trouble in the operating state can be made the most appropriate relationship.

When the direction of the rotation axis of the motor 25 is set to the same direction as the axis 32 of the casing 26, the direction in which air is sucked by the motor 25 having the fan 24 and the direction of air flowing through the casing 26 substantially match. Therefore, the power loss of the motor 25 can be reduced.

It should be noted that the blower of the present invention is not limited to the above-described embodiment, and it goes without saying that various changes can be made without departing from the spirit of the present invention.

[0042]

According to the blower of the present invention, various excellent effects as described below can be obtained.

I) According to the blower of the present invention, since the air is sucked only from above by the suction duct, the noise generated when the air is sucked is diffused upward, and is located horizontally behind the suction duct. Noise can be suppressed for the ground part.

II) When the casing is inclined upward with respect to the horizontal plane, the power loss of the blower caused by the angle difference that changes the air taken in from above into the horizontal direction can be suppressed.

III) When the angle of the axis of the casing is set to an angle of 30 ° or less upward with respect to the horizontal plane, the power loss of the blower caused by the angle difference that changes the air taken in from above into the horizontal direction can be suppressed. This prevents a load on the rotating shaft of the motor from hindering the operation of the blower, which is caused when the angle of the axis of the casing is larger than 30 ° upward with respect to the horizontal plane. Unbalanced balance can be suppressed.

IV) If the direction of the rotating shaft of the motor is set to the same direction as the axis of the casing, the direction in which air is sucked in by the motor provided with the fan and the direction of air flowing through the casing substantially coincide with each other. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view showing an embodiment of a blower of the present invention.

FIG. 2 is a view in the direction of arrows II-II in FIG.

FIG. 3 is a view in the direction of arrows III-III in FIG. 1;

FIG. 4 is a view in the direction of arrows IV-IV in FIG. 1;

FIG. 5 is a diagram showing a state in which a conventional blowing device blows air.

FIG. 6 is a side view showing an example of a conventional blower.

7 is a view in the direction of arrows VII-VII in FIG. 6;

8 is a view in the direction of arrows VIII-VIII in FIG. 6;

FIG. 9 is a side view showing an example of another conventional blower.

FIG. 10 is a view taken in the direction of arrows XX in FIG. 9;

FIG. 11 is a diagram showing a state in which another conventional blowing device blows air.

[Explanation of symbols]

 24 Fan 25 Motor 26 Casing 29 Front Duct 31 Suction Duct 32 Axis

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Yasuhiro Tomioka 3-2-16-1 Toyosu, Koto-ku, Tokyo Ishikawajima Harima Heavy Industries, Ltd. Tokyo Engineering Center (72) Inventor Fumio Izumi 4-5-5 Imai, Gojo City, Nara Prefecture (72) Inventor Osamu Hirai 2-1 Shimizu, Suita-shi, Osaka F-term (reference) in Japan Kanomax Corporation 3H033 AA02 BB02 BB08 BB20 DD01 EE06 EE19

Claims (4)

[Claims] 1. A casing for holding a motor having a fan, a front duct located on the air blowing side of the casing and blowing air in a horizontal direction, and a suction located on the suction side of the casing and sucking air only from above. A blower, comprising: a duct. 2. The blower according to claim 1, wherein the casing is inclined upward with respect to a horizontal plane. 3. The blower according to claim 2, wherein the angle of the axis of the casing is set to 30 ° or less with respect to the horizontal plane. 4. The blower according to claim 2, wherein the direction of the rotation axis of the motor is the same as the axis of the casing.