JP2001082778A - Tornado type air flow controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a tornado type air flow controller which can be manufactured and assembled easily by simplifying the structure of stators for generating a swirl flow. SOLUTION: In a tornado type air flow controller which blows out air introduced into a specified space at a specified supply pressure as a spiral swirl flow through an air outlet 3 having a large number of stators 30a, 30a,... for generating a swirl flow arranged in the circumferential direction at a specified interval, the stators 30a, 30a,... are formed by making required number of cuts in the outer circumferential fringe of a flat plate 30 and then bending the stripe parts at a specified angle from a specified position.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tornado type airflow control device capable of forming a spiral swirling vortex in air to be blown.

[0002]

2. Description of the Related Art Heretofore, as a method of ventilating a predetermined local area, for example, a tornado-type ventilator that generates a spiral intake swirling flow in the exhaust direction in relation to the supplied air is known. ing.

[0003] For example, Japanese Patent Application Laid-Open No.
As disclosed in Japanese Patent Publication No. 540, an air flow is blown out from four pillars to generate a spiral upward vortex in a space partitioned by an air curtain, and the vortex is orthogonal to the vortex at the center of the space. Some are designed to produce a suction effect in the direction.

However, in the case of this device, there is a problem that four columns must be installed, and the installation space is limited.

Therefore, as a tornado-type ventilator which does not require the above-mentioned support, for example, Japanese Patent Laid-Open No. 4-140
Japanese Unexamined Patent Publication (Kokai) No. HEI 9-205 (1994) has been proposed.

In this apparatus, a quadrangular pyramid-shaped exhaust hood is provided above a space to be ventilated, and an exhaust port of an exhaust duct connected to an exhaust fan is opened at the center of the exhaust hood. The air is ejected in the tangential direction on the same circumference as the center of the exhaust port to generate a spiral airflow that rises spirally due to the ejected air and the negative pressure from the exhaust port, and the lower airflow is generated by the spiral airflow. In a ventilator configured to ventilate the target space, an air supply chamber is fixed to a lower outer peripheral portion of the exhaust hood, and a lower surface of the air supply chamber has the same circumference as the center of the exhaust port at a predetermined interval. A first air ejection port for ejecting air in a tangential direction of the second air ejection port and a second air ejection port for ejecting air toward the lower floor surface are alternately provided. Direct air from exit to floor By jetting, while not disturbing the air by the spiral air flow blown out from the first air jetting port, and is configured to perform ventilation of the ventilation target space by the rising spiral air current.

However, in the case of such a configuration, an air supply chamber having an outer diameter corresponding to the outer periphery of an exhaust hood having a large opening diameter continuous with the exhaust duct is provided, and the air supply chamber is tangential to the center of the exhaust port. It is necessary to arrange a large number of first air outlets for blowing air to the air and a large number of second air outlets for blowing air toward the lower floor surface side by side. It is indispensable, has high noise, and can be applied only as a spot-type ventilator in large facilities such as factories. In addition, since the air blowing flow in the air blowing section is not continuous in the circumferential direction and is divided, it is not possible to form an air curtain flow that is uniform between the outside and a uniform flow velocity distribution of the blowing air flow.

Therefore, recently, in order to solve the above-mentioned problem, two ducts, an intake duct 2 and an outside air ventilation duct (supply duct) 5, are installed as shown in FIGS. 5 to 7, for example. On the other hand, a frusto-conical intake hood 1 having a large-diameter air-collecting opening 1a and a substantially conical external air blower chamber 4 having an air outlet 3 are provided in an inner / outer two-layer structure corresponding to the above. At the center of the top plate 1b of the hood 1, the intake port 2a of the intake duct 2 and the opening 1a of the intake hood 1 are provided, and at the top 4a side of the outside air ventilation chamber 4, the air introduction port of the outside air ventilation duct 5 is inclined obliquely tangentially. 5a
And the blowing air swirling space 4c are communicated with each other, and the outside air introduced into the blowing air swirling space 4c of the outside air blowing chamber 4 through the air inlet 5a of the outside air blowing duct 5 is swirled in the same space 4c. While rectifying holes 6a, 6a ...
After the flow is rectified by the rectifying plate 6 provided with the circulating flow, the swirling flow generating stators 3a, 3 provided at the lower surface side opening of the outside air blowing chamber 4 so as to surround the intake hood 1 or the intake port 2a.
7, spirally blown out around the predetermined local area to form an air curtain-shaped swirling vortex F _1, as shown in FIG. 7, and the swirling vortex F ₁ The inside air is taken in the direction of the intake port 2a of the intake duct 2 opposite to the air blown out to the periphery of the local area, and the intake air rises in a tornado shape in the direction of the intake port 2a by the intake negative pressure at the time of the intake. tornado-type ventilator for performing effectively ventilated by generating a swirling vortex flow F ₂ is adapted to be proposed.

[0009]

However, in the case of the tornado-type ventilator having the above-described structure, a large number of swirling flow generating stators 3a, 3a. .. Are attached to the air outlet 3 one by one at a predetermined radial angle, for example, on the outer peripheral surface 1c side of the intake hood 1 or the inner peripheral surface 4b on the lower end side of the outside air blower chamber 4. In addition, there is a problem that the mounting error is easily caused and an installation error easily occurs. In addition, the manufacturing cost increases.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is simple and easy to divide the outer peripheral edge of a flat plate into a required number of bands and bend them at a desired angle. It is an object of the present invention to provide a tornado-type airflow control device which can form an accurate swirling flow generation stator and solves the above problem.

[0011]

In order to achieve the object, the present invention is provided with the following means for solving the problems.

(1) The tornado-type airflow control device according to the present invention maintains the air introduced into the predetermined space 4c with the predetermined blowing pressure at a predetermined interval in the circumferential direction. In a tornado-type airflow control device that blows out as a spiral swirling vortex through an air outlet 3 having a plurality of swirling flow generating stators 30a, 30a, the swirling flow generating stators 30a, 30a are provided.
Are formed by cutting the outer peripheral edge of the flat plate 30 into a required number of band-shaped portions and bending the cut-out band-shaped portion from a predetermined position to a predetermined angle.

Therefore, in this configuration, a large number of swirling flow generating stators 30a, 30a,... Are formed in only two steps of the operation of cutting the outer peripheral edge of the flat plate 30 into a strip shape and the operation of bending the flat plate 30 to a predetermined angle. So that all the swirling flow generating stators 30a, 30a,... Can be simultaneously installed in the air outlet 3 through the flat plate 30 in one operation. Become.

[0014] Therefore, while the installation accuracy is increased, the production and the assembling are facilitated, and the product cost is greatly reduced.

(2) The invention of claim 2 The tornado-type airflow control device of the present invention is characterized in that the above-mentioned claim 1
In the configuration of the invention described above, the predetermined space 4c is formed in a blast air swirl space that preliminarily swirls the introduced air, and swirls the introduced air with respect to the blown air swirl space. The air inlet 5a of the air supply duct 5 is connected in a tangential direction.

Therefore, in this configuration, by the action of the air inlet 5a of the air supply duct 5 and the blast air swirling space,
Since the air supplied to the air outlet 3 is formed in a swirl flow in advance, the swirl flow generating stators 30a, 30a
The swirling flow generating action is further improved.

As a result, a good air curtain flow with a high degree of closure is formed by a reliable swirling vortex flow.

(3) Invention of Claim 3 The tornado-type airflow control device of the present invention is the above-mentioned claim 2.
In the configuration of the invention described above, a rectifying plate 6 having rectifying holes 6a, 6a,... For making the flow velocity distribution of the swirled air uniform is provided in the blown air swirling space. And

Therefore, in this configuration, the air supplied to the air outlet 3 is formed into a swirling flow having a stable flow velocity distribution in advance by the action of the air inlet 5a, the blown air swirling space, and the flow regulating plate 6. Therefore, the swirl flow generating action by the swirl flow generating stators 30a, 30a,... Is further improved, and the blown air flow is further stabilized.

As a result, a good air curtain flow with a higher degree of closure is formed.

(4) The invention of claim 4 The tornado-type airflow control device of the present invention is the above-mentioned claim 2.
Alternatively, in the configuration of the invention described in 3, the above-mentioned blast air swirling space is formed in the substantially conical blowing chamber 4, and a dome-shaped inside of the blowing chamber 4 is formed through the blowing air swirling space. It is characterized in that an intake port 2 to the outside having an intake hood 1 is provided.

Therefore, in this configuration, the air introduced into the blowing air swirling space in the substantially conical blowing chamber 4 becomes a spiral swirling vortex having a uniform flow velocity distribution through the air outlet 3. Is blown out and the intake hood 1
A stable air curtain flow is formed on the outer peripheral side.

On the other hand, an intake swirling vortex that rises in a tornado shape is reliably formed by the suction force sucked in the exhaust direction through the intake port 2a, thereby achieving a good ventilation action in a predetermined local area. Is done.

(5) The invention according to claim 5 The tornado-type airflow control device according to the present invention is the above-described claim 4.
In the configuration of the described invention, the intake hood 1 is detachably attached to the blower chamber 4 side body.

Therefore, with this configuration, the intake hood 1 to which dirt is most likely to adhere as a ventilation device can be freely removed and cleaned.

[0026]

As described above, according to the tornado-type airflow control device of the present invention, it is possible to provide a tornado-type airflow control device with a simple and low-cost configuration and higher performance.

Therefore, when this device is applied to, for example, the tornado-type ventilation device as described above, it becomes possible to efficiently ventilate a predetermined local area by a reliable air curtain flow.

[0028]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows a configuration of a tornado-type ventilation device configured by employing a tornado-type airflow control device according to an embodiment of the present invention.

This tornado-type ventilator is provided, for example, above a cooking appliance as a predetermined local area such as a gas table in a kitchen of a general household or a commercial kitchen of a restaurant. while wrap from above by outside air introduced around the outside to the air curtain by spiral swirling vortex F ₁ to the lower side, the intake direction acting on the air curtain of spiral swirling vortex F ₁ within the central portion allowed form tornado-like air swirling vortex F ₂ occurring upward in the air curtain of spiral swirling vortex F ₁ by suction negative pressure to said predetermined local by該竜winding shaped upwardly whirling vortex F ₂ The smoke and odor generated from the cooking device in the area can be efficiently sucked and exhausted to the outside of the room.

In FIG. 1 to FIG. 4, reference numeral 4 designates, for example, a substantially conical outside air blowing chamber provided above the above-mentioned odor or smoke contaminated air generating source. At a predetermined interval, a dome-shaped air-intake hood 10 having a relatively shallow depth in a dome-shaped exhaust direction has its opening edge 10d projecting downward by a predetermined dimension from the lower end side opening surface of the outside air blowing chamber 4. It is provided detachably in a state (described later). Thus, while effectively turning the outside air introduced between the outside air blowing chamber 4 and the intake hood 10 inside the outside air blowing chamber 4 through an outside air inlet 5a of an outside air blowing duct (air supply duct) 5 described later. A blast air swirling space 4c is formed in which the passage diameter gradually increases in the traveling direction for guiding the air toward the air outlet 3, and the air flow to be supplied to the air outlet 3 is formed into a swirl at a predetermined flow rate in advance. It has become.

In the blowing air swirling space 4c,
A plurality of air flow rectifying holes 6a, 6a,... For rectifying the swirling flow formed as described above and making the flow velocity distribution uniform are provided above the intake hood 10. A straightening plate 6 is provided. The current plate 6 is formed of, for example, a punching plate as shown in the figure, and is connected to a sleeve (connecting member) 20 on the outer periphery of the intake duct 2 and the outside air blowing chamber 4 through ring corner brackets 61 and 62, respectively. It is attached at both ends.

Further, a bent outside air inlet 5a at the tip end of the outside air blowing duct 5 is provided to the outside air blowing chamber 4 to introduce outside air supplied from the outside in an oblique tangential direction (turning direction). Are connected in communication. Further, the intake hood 10 is introduced through the top 4a of the outside air blow chamber 4 from above and downward, and the lower end side intake port 2a is positioned near the surface of the intake opening 10a of the intake hood 10. The intake duct 2 extended (projected) in a cylindrical shape is connected in a communicating state. The outside air intake end of the outside air blow duct 5 and the inside air discharge end of the intake duct 2 are each extended outside. At the outside ends of the outside air ventilation duct 5 and the intake duct 2 which are not shown in the drawing, an outside air ventilation fan and a suction fan (intake / exhaust fan) including, for example, a multi-blade fan (sirocco fan) are provided. By these driving, a corresponding outside air blowing action and intake / exhaust action are realized.

The above-described sleeve 20 that can penetrate the intake duct 2 is fitted around the inner and outer peripheral portions of the blown air swirling space 4c of the intake duct 2.
As described later, in addition to the above-mentioned straightening plate 6, the swirling flow generating stator 3
, And the intake hood 10 are integrated.

The intake duct 2 is also inserted into the sleeve 20 and fixed after setting the position of the intake port 2a to an appropriate position as described above.

Further, auxiliary intake ports 2b, 2b,... For sucking inside air collected in the intake hood 10 are provided on the upper outer periphery of the intake port 2a of the intake duct 2, and an oil receiving groove is provided at a lower end. Each of the oil receivers 7 has a U-shaped section and has a cross section 7a.

The air outlet 3 is, for example,
A predetermined passage length is provided between the lower end side inner peripheral surface 4b of the outside air blowing chamber 4 and the shoulder outer peripheral surface 10c of the intake hood 10 and is continuously annularly opened in all circumferential directions; It is formed obliquely at a predetermined inclination angle whose center diameter gradually increases from the upper side to the lower side. And
A plurality of swirling flow generating stators 30a, 30a,... Each having a predetermined inclination angle (radial angle) downward in the spiral direction are arranged side by side at predetermined intervals in the entire circumferential direction. Have been.

The swirling flow generating stators 30a, 30a.
.. Should be provided by inserting parabolic slits 31, 31,... In the outer peripheral edge of the circular metal flat plate 10 having a fitting hole 30c for the sleeve 20 at the center, as shown in FIG. 4, for example. Swirling flow generating stators 30a, 30a,.
The notch is cut in a band shape corresponding to the number, and each cut-out band portion is bent at a predetermined angle θ at a predetermined position (position on radiation) on the main body portion 30b side of the metal flat plate 30 to obtain a predetermined angle. And has a predetermined radial angle and a gentle arc shape extending in the parabolic direction. Then, the peripheral edge of the inner peripheral sleeve fitting port 30c of the metal flat plate main body 30b is fitted and mounted from above on the lower end flange 20a of the sleeve 20 on the outer periphery of the intake duct 2, and the circular elongated holes 11, 11 are formed. , And fixed by screws 14, 14,..., And the swirling flow generating stators 30a, 30a,. It is supposed to be.

The top plate of the dome-shaped intake hood 10 is provided on the lower surface side of the lower end side flange 20a of the sleeve 20 for supporting the flat plate body portion 30b of the swirling flow generating stators 30a. The portion 10b is integrally attached so that it can be easily attached or detached from below by detachable attaching means such as a slide engagement method.

That is, the intake hood 10 is attached, for example, by engaging a hook-shaped engagement piece 1 having a predetermined vertical gap on the lower surface side of the lower end flange 20a of the sleeve 20.
Are provided, while the top plate 1 of the intake hood 10 is provided.
.. Are arbitrarily fitted on the side 0b, and are slid in the circumferential direction by a predetermined rotation angle from the fitted position, so that the side edges enter the gap and are positioned. Square engaging hole 1 engaged so as to overlap in the state
. Are provided, and are fixed by screws 15, 15 at the engagement positions.

Therefore, in the above configuration, for example, if the outside air blower fan on the side of the outside air blower duct 5 and the intake fan on the side of the intake duct 2 are respectively driven, first, the outside air inlet 5a Is blown toward the tangential direction in the blown air swirling space 4c by the blowing pressure from the outside air blowing fan. While being efficiently swirled in the blowing air swirling space 4c, the air is rectified by the rectifying holes 6a, 6a,... Of the rectifying plate 6, and becomes a stable swirling flow having a uniform flow velocity. The air is supplied to the air outlet 3 provided between the side inner peripheral surface 4b and the shoulder outer peripheral surface 1c of the intake hood 10. When passing through the air outlet passage of the air outlet 3, the swirl flow generating stators 3a, 3a
By ..., is greater vectors of the turning direction is applied, out of the more strongly the entire circumferential direction uniform airflow rate and stable spiral swirl cooking appliance airflow F ₁ and turned to in the lower side by a predetermined local region It is blown out diagonally toward the surroundings.

As a result, the helical stable blow-off swirling air flow F ₁ forms a reliable air curtain flow that surrounds the smoke and odor emitted from the cooking device in the predetermined local area so as not to diffuse around. At the same time, the suction force of the intake fan is provided on the inner side in the direction of the central axis in the direction of the intake port 2a extending in a cylindrical shape to the vicinity of the opening 10a surface of the intake hood 10 of the intake duct 2 in the opposite direction. swirling air flow F ₂ stably a large suction force of the tornado-like rising from the lower side to the upper side is formed.

[0042] Then, thereby ensuring exhaust air contaminated smoke and odors like cooking appliance part wrapped by the air curtain stream consisting outlet whirling airflow F ₁ of the spiral,
Cleaning becomes possible.

In the tornado type airflow control device of the present embodiment, as described above, the air introduced into the blown outside air swirling space 4c with the predetermined blowing pressure by the outside air blowing fan is rotated in the circumferential direction by a predetermined amount. In a tornado-type airflow control device that blows out as a spiral swirling flow through an air outlet 3 having a plurality of swirling flow generating stators 30a, 30a,.
are formed by cutting the outer peripheral edge of the circular metal plate 30 into a required number of strips and bending the cut-out strips from a predetermined position to a predetermined angle. .

Therefore, in this configuration, the large number of swirling flow generating stators 30a, 30a,... Have only two steps, that is, the operation of cutting the outer peripheral edge of the metal plate 30 into a band shape and the operation of bending the metal plate 30 to a predetermined angle. , And all the swirling flow generating stators 30a, 30a,.
Through b, the work can be installed in the air outlet 3 simultaneously with one operation.

Therefore, each swirl flow generating stator 30a,
The installation accuracy of the devices 30a... Is increased, while the production and assembly are facilitated, and the product cost is greatly reduced.

In the same apparatus, the outside air introduction space through which outside air is introduced through the outside air introduction port 5a of the outside air blowing duct 5 is:
Ventilation outside air swirl space 4 for swirling the introduced air in advance
The outside air inlet 5a of the outside air blow duct 5 is connected to the outside air swirling space 4c in a tangential direction so as to swirl the introduced outside air.

Therefore, in this configuration, the air supplied to the air outlet 3 is formed into a swirling flow in advance by the action of the outside air inlet 5a of the outside air blowing duct 5 and the blowing outside air swirling space 4c. , The above-mentioned swirling flow generating stator 30
a, 30a... further improves the swirling flow generating action.

As a result, a good air curtain flow with a high degree of closure is formed.

Further, in the same apparatus, the above-mentioned outside air swirling space 4
c, there are provided a number of rectifying holes 6a, 6a,... for making the flow velocity distribution of the swirled outside air uniform.
Is provided.

Therefore, in this configuration, the air supplied to the air outlet 3 is formed into a swirling flow having a stable flow velocity distribution in advance by the action of the outside air inlet 5a, the blowing outside air swirling space 4c, and the rectifying plate 6. , The swirl flow generating action by the swirl flow generating stators 30a, 30a,... Is further improved, and the blown air flow is more stable.

As a result, a good air curtain flow with a higher degree of closure is formed.

Further, in the apparatus, the blowing outside air swirling space 4c is formed in the substantially conical blowing chamber 4 and a dome-shaped inside of the blowing chamber 4 is provided through the blowing outside air swirling space 4c. An intake port 2 to the outside having an intake hood 10 is provided.

Therefore, in this configuration, the air introduced into the blowing outside air swirling space 4c in the substantially conical blowing chamber 4 is blown out as a spiral swirling flow through the air outlet 3 and An air curtain flow is formed on the outer peripheral side of the intake hood 10.

On the other hand, an intake swirling vortex that rises in a tornado shape is formed inside by the suction force sucked in the exhaust direction through the intake port 2a, and a good ventilation action is realized.

Further, in the apparatus, the intake hood 10 is detachably attached to the main body on the side of the outside air blower chamber 4.

Therefore, with this configuration, the intake hood 10 to which dirt is most likely to adhere as a ventilation device can be freely removed and cleaned.

As a result, according to the tornado-type airflow control device of the present embodiment, it is possible to provide a more sophisticated tornado-type airflow control device with a simple and low-cost configuration.

Therefore, when the device is applied to, for example, the tornado-type ventilation device as described above, it becomes possible to efficiently ventilate a predetermined local area by a reliable air curtain flow.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a tornado-type ventilation device configured by a tornado-type airflow control device according to an embodiment of the present invention.

FIG. 2 is a plan view of a main part showing a configuration of the device.

FIG. 3 is a perspective view showing a configuration of a main part of the apparatus.

FIG. 4 is an explanatory plan view showing a configuration of a main part of the apparatus.

FIG. 5 is a cross-sectional view illustrating a configuration of a conventional tornado-type ventilation device.

FIG. 6 is a bottom view showing the configuration of the conventional tornado ventilator.

FIG. 7 is a perspective view for explaining the operation of the conventional tornado type ventilator.

[Explanation of symbols]

2 is an intake duct, 2a is an intake port of the intake duct 2, 3 is an air outlet, 4 is an outside air ventilation chamber, 4c is a ventilation outside air swirling space, 5 is an outside air ventilation duct, and 5a is an outside air ventilation duct 5.
Outside air introduction port, 6 is a rectifying plate, 6a is a rectifying hole of the rectifying plate 6,
10 is an intake hood, 10a is an air intake opening of the intake hood,
30 is a circular metal flat plate, 30a is a swirling flow generating stator,
30b is a metal plate main body, and 30c is a sleeve fitting opening.

Continued on the front page F term (reference) 3L058 BH02 BH03 BH04 BJ01 BJ05 BK02 BK04 3L081 AA01 AB02 BA04 BB07

Claims (5)

[Claims] A predetermined space (4) having a predetermined blowing pressure.
The air introduced into c) is swirled by a large number of swirling flow generating stators (30a), (3) arranged at predetermined intervals in the circumferential direction.
0a). A tornado-type airflow control device which blows out as a spiral swirling vortex through an air outlet (3) having the swirling flow generating stators (30a), (30).
a) is formed by cutting the outer peripheral edge of the flat plate (30) into a required number of band-shaped portions and bending the cut-out band-shaped portion from a predetermined position to a predetermined angle. Features a tornado type airflow control device. 2. The predetermined space (4c) is formed in a blown air swirl space for swirling the introduced air in advance.
2. The tornado according to claim 1, wherein an air inlet (5a) of an air supply duct (5) is connected tangentially to the blown air swirling space so as to swirl the introduced air. Type airflow control device. 3. A rectifying hole (6a) for making the flow velocity distribution of the swirled air uniform in the blown air swirl space.
3. A tornado-type airflow control device according to claim 2, further comprising a rectifying plate (6) having (6a). 4. The blast air swirling space is formed in a substantially conical blast chamber (4), and a dome shape is formed inside the blast chamber (4) via the blast air swirling space. The tornado-type airflow control device according to claim 2 or 3, further comprising an intake port (2) to the outside having the intake hood (1). 5. The tornado-type airflow control device according to claim 4, wherein the intake hood (1) is detachably attached to a main body of the blower chamber (4).