JP3476705B2 - Push airflow generator - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push air flow generator suitable for use in a push-pull type dust collector, a ventilation device, or the like.

[0002]

2. Description of the Related Art A push-pull type dust collector is known, for example, from Japanese Patent Publication No. 35-1641 and Japanese Patent Laid-Open No. 4-63.
As disclosed in Japanese Patent No. 183, etc., the air blown from the air blowing device is configured to be sucked into a dust collecting hood where the suction action of the dust collecting blower is exerted to collect the dust. The air blown from the air blowing device forms an air curtain that shuts off the work area from the surroundings, and the dust hood sucks the blown air to contaminate the contaminated air and gas generated from the work area. It has a structure that can collect dust by sucking it into the dust collection hood without diffusing it outside, and the push-pull type ventilation device is also a ventilation hood that blows air similarly to the suction action of the exhaust fan. By suction, it is configured to form an air curtain that shields the work area from the surroundings.

[0003]

However, a push airflow generating device (air blowing device) used in a conventional general push-pull type dust collector, ventilation device, or the like.
Indicates that the velocity of the air flow in the air blowing duct, that is, in the air blowing portion is high in the central portion of the air blowing portion and becomes small as it approaches the surrounding wall, resulting in an uneven air flow balance as a whole. As a result, the air flow becomes uneven in the work area, and a strong air flow or a weak air flow partially occurs, which may hinder work.
There was a problem that the dust collection effect and the ventilation effect also varied.

Therefore, the technical problem of the present invention is that when the airflow generated by the blower fan is blown out from the blowing portion, it can be uniformly rectified and blown out so that a strong airflow or a weak airflow does not flow locally. It is to provide a push airflow generation device devised as described above.

[0005]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows.

[0006] A push air flow generating device configured to blow out an air flow generated by a blower fan while rectifying the air flow by a rectifying plate provided in an air flow blowing section,

(1) A plurality of crossflow type fans are used as the blower fan, and the plurality of crossflow type fans are opposed to the airflow suction port of the airflow blower. The airflows sent from the fans facing each other are made to collide with each other to be guided to the airflow blowing section, and the inside of the airflow blowing section has a direction perpendicular to the airflow blowing direction. Install the straightening vanes made of perforated plates in the directions parallel to. (Claim 1)

(2) Inside the airflow blowing section, a plurality of straightening vanes made of perforated plates are arranged side by side in the direction perpendicular to the direction of airflow blowing, and the respective straightening vanes are formed. Inside the space between the plates, a straightening tube made of a perforated plate and having a rectangular cross section should be provided in a direction parallel to the airflow blowing direction. (Claim 2)

(3) A straightening cylinder having a rectangular cross section is provided at the center of each of the straightening plates arranged side by side. (Claim 3)

(4) The entire push air flow generator is
It should be configured so that it can be moved using a moving means such as casters. (Claim 4)

According to the means of claim 1 described in the above (1), after the airflows sent from the crossflow type fans provided facing each other in the left-right direction and the up-down direction collide with each other in the central portion, It is rectified and blown out by the rectifying plate that is perpendicular to the air flow and the rectifying plate that is parallel to it, so that it is evenly rectified so that a strong air flow or a weak air flow does not flow, and the central part of the air flow blowing part and the wall side etc. It is possible to blow out the airflow at a uniform speed without distinction.

According to the second aspect of the invention described in (2) above, since the airflow generated by the crossflow type fan collides with the outer surface of the straightening cylinder having a rectangular cross section, a part of the airflow is generated. The direction is changed toward you toward the blowout part, and the remaining airflow goes through each hole of the straightening cylinder to the inside, and collides with the opposing airflow sent from the opposing crossflow type fan and changes its direction. It is changed and sent as a blowing air flow. Furthermore, as the air flow advances, it also collides with the current plate installed at right angles to the air flow direction, and part of it passes through each hole as it is, and the colliding air flow changes its direction and is sent as a blown air flow. Is uniformly rectified and the rectification by these rectification cylinders and rectification plates is repeated a plurality of times, so that the airflow can be blown out at a uniform speed without distinction between the central portion of the airflow blowing portion and the wall.

According to the third aspect of the invention described in (3) above, the central portion is provided with the airflow sent toward the central portion from the cross flow type fans provided facing each other in the left-right direction and the upper-lower direction. Since the rectifying cylinder rectifies evenly under the same conditions,
It is possible to blow out the airflow at a uniform speed from the entire surface of the airflow blowing part without any unevenness on the left or right or up and down.

According to the fourth aspect of the invention described in (4) above, there is provided a push airflow generation device capable of exhibiting the above-mentioned rectification function and blowing out the airflow from the entire surface of the airflow blowing portion at a uniform speed, It is possible to move it to a necessary place by using a moving means such as a caster and freely use it for dust collection and ventilation.

As described above, the above (1)-
The above-mentioned technical problem is solved by the means (4),
It is possible to solve the problems of the conventional technology.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of a push airflow generating device according to the present invention will be described with reference to the drawings.
Is an exploded perspective view of the present invention, FIG. 2 is a front view of the present invention, FIG. 3 is a plan view thereof, and FIG. 4 is an enlarged sectional view taken along line XX of FIG. In these drawings, reference numeral 1 generally indicates a push air flow generator body, and 1A, 1B, 1C and 1D are opposed to each other on the upper and lower sides and the left and right sides of the rear portion of the body 1. , And 1H ... are outside air suction ports opened on the back surfaces of the respective fan chambers 1A to 1D, and 1X is a back plate of the machine body 1.

2A, 2B, 2C and 2D are cross-flow type fans which are provided inside each of the fan chambers 1A to 1D and are horizontally long, and 3A, 3B, 3C and 3D are these fans 2A to 2D. A motor 5 for rotating the air blower 5 is an airflow blowing portion having a substantially cylindrical cross-section protrudingly provided on the front surface of the machine body 1. The fan chambers 1A to 1D and the inside of the airflow blowing portion 5 communicate with each other, and By the rotation of the flow-type fans 2A to 2D, the fan chambers 1A to
The airflow taken in 1D is blown into the airflow blowing unit 5.

Reference numerals 7, 8, and 9 are first, second, and third arranged inside the airflow blowing portion 5 in a direction perpendicular to the airflow blowing direction, respectively, and possibly in front of and behind. The rectifier plates 7R, 8R, 9R are between the back plate 1X and the first rectifier plate 7 described above, between the first rectifier plate 7 and the second rectifier plate 8, and between the second rectifier plate 8 and the third rectifier plate. The first, second, and third rectifying passages 6A, 6B, and 6C provided between the plates 9 are parallel to the center of the rectifying passages 7R, 8R, and 9R, respectively, with respect to the blowing direction of the air flow. The first, second, and third rectangular rectifying cylinders 7R ', 8R', and 9R 'provided on the respective rectifying cylinders 6A,
In the internal passages of 6B, 6C, these rectifying cylinders 6A, 6B,
6C and each of the above-described straightening vanes 7, 8 and 9 are each configured by using a perforated plate having a large number of small holes 6T ... And 7T ..., 8T.

Numeral 10 is a protective frame attached to the air flow outlet 5A opened at the tip of the air flow outlet 5,
0T is a louver provided on the protective frame 10, 10R is a fourth rectifying passage provided between the louver 10T and the third rectifying plate 9, and 4 is a support for supporting the entire body 1 at a predetermined height. The legs 4A ... Are wheels such as casters attached to the support legs 4, and the entire push airflow generating device is structured so that they can be moved to any place by using these wheels 4A.

Since the push air flow generating device according to the present invention has the above-described structure, each cross flow type fan 2
By the rotation of A to 2D, the airflow blown from the outside air suction ports 1H ... through the respective fan chambers 1A to 1D toward the airflow blowing section 5 vertically and on both left and right sides is first in the first rectifying passage 7R in the central portion. And then collide with the outer surface of the first flow straightening cylinder 6A, part of which changes its direction toward the front toward the airflow outlet 5A, and the remaining airflow is small in the first flow straightening cylinder 6A. The first flow straightening cylinder 6 passes through the holes 6T.
While heading to the internal passage 7R 'of A, it changes direction by colliding with the opposing airflows from the opposing fans 2A to 2D,
It is sent as an air stream.

Each of the air streams whose directions have been changed as described above collide with the first straightening vanes 7 which are provided at right angles, and some of them pass through the small holes 7T ... Although entering the flow straightening passage 8R, the air flow colliding with the flow straightening plate 7 changes its direction to the left, right, and up and down again, so that the air flow can be made uniform. Three
By repeating the same in the rectification passage 9R and the internal passages 8R ', 9R' of the rectification cylinders 6B, 6C, the velocity of the airflow is surely made uniform, and the airflow blowing part 5 is passed from the fourth rectification passage 10R through the louver 10T. Can be blown to the front of.

Although the drawing shows a structure in which a total of four crossflow type fans 2A to 2D are provided on the upper, lower, left and right sides, either one of the upper, lower, left and right sides (2
Table) may be provided, and a total of three straightening vanes 7 are provided as straightening vanes perpendicular to the airflow blowing direction.
8 and 9 are provided, and further three rectifying cylinders 6A, 6B are also provided as rectangular rectifying cylinders parallel to the air flow blowing direction.
6C is provided, the number of straightening vanes and straightening vanes is only an example, and the present invention is not limited to the illustrated configuration.

FIG. 7 is a front view of the push airflow generator according to the present invention shown in FIG.
4 and 5 are the X axis, and a, b, c, d, and e are the Y axis, the wind velocity distribution at each intersection is shown in FIG. 400 mm,
FIG. 8 is a table showing the measurement values measured for each measurement distance of 600 mm, and FIG. 8 shows each wind velocity distribution in the conventional push airflow generating device having no rectifying function of the present invention described above. The table shows the measured values when measured under the same conditions as.

As is clear from the respective wind velocity distributions in the tables shown in FIGS. 7 and 8, the push air flow generator of the present invention has almost the same wind velocity at the central portion of the air flow blowing portion 5 and its peripheral portion. It was found that the wind velocity in the central portion was high and the wind velocity in the peripheral portion was low, whereas the wind velocity was non-uniform in the conventional push airflow generator, while the wind velocity was uniform.

[0025]

As described above, according to the push airflow generating device of the present invention, the airflow blown out from the airflow blowing portion does not show any change in the wind speed at the central portion and its peripheral portion, and is uniform. Since it can be blown out at the wind speed, it is possible to create an air curtain with a uniform wind speed, and in combination with the fact that the entire device can be easily moved to any location and used, dust collectors and ventilation systems can be used. It can be used in a device or the like to exert an excellent dust collecting action and ventilation action.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an entire push airflow generating device according to the present invention.

FIG. 2 is a front view of the present invention.

FIG. 3 is a plan view of the present invention.

FIG. 4 is an enlarged sectional view taken along line XX of FIG.

FIG. 5 is an explanatory view clearly showing a measurement position of a wind speed blown out from an airflow blowing unit.

FIG. 6 is an explanatory diagram that clearly shows the measurement distance during measurement.

FIG. 7 is a table showing a wind velocity distribution of the airflow rectified according to the present invention.

FIG. 8 is a table showing a wind velocity distribution of a conventional push airflow generator.

[Explanation of symbols]

1 Airframe 1A, 1B, 1C, 1D Fan chambers 2A, 2B, 2C, 2D Cross-flow type fan 4A Wheels such as casters 5 Airflow blowing parts 6A, 6B, 6C Square flow straightening cylinders 6T Small holes 7, 8, 9 Straightening plates 7T , 8T, 9T Small hole 7R, 8R, 9R Rectifying passage 7R ', 8R', 9R 'Internal passage of each rectifying cylinder

Continuation of front page (56) Reference JP-A-8-193734 (JP, A) JP-A-5-223109 (JP, A) JP-A-10-148368 (JP, A) JP-A-6-33917 (JP , A) Japanese Unexamined Patent Publication No. 4-63183 (JP, A) Actually opened 50-9808 (JP, U) Actually opened 56-62119 (JP, U) Actually opened 57-147299 (JP, U) JP 35-1641 (JP, B1) JP-B 46-15826 (JP, B1) JP-B 45-15734 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F24F 13/08 F04D 17/04 F04D 25/08 302 F04D 25/16 F24F 7/007

Claims (4)

(57) [Claims] 1. An air flow generated by a blower fan,
A push airflow generating device configured to blow out while rectifying by a flow straightening plate provided in an airflow blowing unit, wherein a plurality of crossflow type fans are used as the blower fan, and a plurality of these crossflow types are used. The mold fans are attached to the airflow suction ports of the airflow blowing section so as to face each other, and the airflows sent from the opposing fans collide with each other and are guided to the airflow blowing section. A push airflow generator characterized in that, inside the airflow blowing section, rectifying plates made of perforated plates are provided in a direction parallel to a direction perpendicular to the direction of airflow blowing. 2. A plurality of straightening vanes made of a perforated plate are arranged inside the airflow blowing part in a direction perpendicular to the direction of blowing the airflow with a front-rear spacing, and each straightening vane is formed. 2. The push airflow generating device according to claim 1, wherein a straightening tube made of a perforated plate and having a rectangular cross section is provided in the interval of the above in a direction parallel to the airflow blowing direction. 3. The push airflow generating device according to claim 2, wherein a straightening cylinder having a rectangular cross section is provided at a central portion within each interval of the straightening plates arranged in parallel. 4. The push airflow generation device according to claim 1, 2 or 3, wherein the entire push airflow generation device is configured to be movable by using a moving means such as a caster.