JPH03284317A - Uniform gas flow formation apparatus - Google Patents

Abstract

PURPOSE:To improve the energy efficiency and to reduce the noise by providing an opening control part, a filter, and a honeycomb structure in the blowing-out passage perpendicularly bending the flow sent from a blowing-out fan, and changing the opening of an opening control part in each classified zone. CONSTITUTION:A blowing flow straightening unit 25 is constituted by providing a blowing opening 23, the opening control part 26, the filter 27, and the honeycomb structure 28 in the blowing-out passage 22 perpendicularly bending the flow from the blowing-out fan 24. The opening control part 26 consisting of the perforated plate 26A which has all zone classified into 1st-4th zones in order from nearer side of the blowing-out fan 24 so as to have the opening rate of 60-75% in the 1st zone, 30-40% in the 2nd zone, 25% in the 3rd zone, and 10% in the 4th zone to each zoe area of the blowing-out opening 23. By this method, a uniform blowing-out flow is formed all over the area of the blowing-out opening 23.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention can be used for collecting and purifying smoking smoke in offices, collecting, collecting, and removing gas, vapor mist, fume, dust, etc. in factories, etc. The present invention relates to a uniform gas flow forming device suitable for use.

[Prior art] Conventionally, in order to form a uniform gas flow in which the pressure and flow velocity of the gas are uniform in a plane, a blowout fan is used in which the flow direction of the blowout fan is bent at right angles. Two methods have been proposed: one in which a blow-off rectifier is provided at the outlet of the path, and the other in which a suction rectifier is provided in the suction port of a suction path in which the flow direction of the suction fan is bent at right angles.

[Problems to be solved by the invention] However, in the conventional uniform gas flow forming device,
The blow-off rectifier and the suction rectifier each have a complicated structure and a large pressure loss. A large pressure loss means that a high head blower that consumes a large amount of power is required, resulting in poor energy efficiency and high noise.

An object of the present invention is to configure a uniform gas flow forming device with a simple structure and small pressure loss, and to improve energy efficiency and reduce noise.

[Means for Solving the Problems] The present invention as set forth in claim 1 is configured by providing a blow-off rectifying device at the blow-off port of the blow-off path in which the flow direction of the blow-off fan is bent approximately at right angles. In the uniform gas flow forming device, the blowout rectifying device is configured by sequentially installing an aperture control section, a filter, and a honeycomb structure from the upstream side to the downstream side of the blowout port, and the aperture ratio of the aperture control section is , from 1 to 1 in order from the side closest to the blowing fan to the side farthest from the blowout fan.
For each of the four zones of the air outlet, the air flow rate is set to 60-75% in the first zone, 30-40% in the second zone, 25% in the third zone, and 10% in the fourth zone. It was designed so that Note that the aperture ratio represents the aperture ratio per area of each zone.

The present invention according to claim 2 provides a uniform gas flow forming device in which a suction rectifier is provided at the suction port of a suction path in which the flow direction of the suction fan is bent approximately at right angles. The suction rectifier is configured by installing at least an aperture control section at the suction port, and the aperture ratio of the aperture control section is divided into each zone of the suction port, which is divided into first to third zones in order from the side farthest from the suction fan to the side close to the suction fan. every 1st
The ratio is set to 100% in the zone, 30 to 70% in the second zone, and 10 to 25% in the third zone.

The present invention as set forth in claim 3 provides a blow-out rectifying device at the outlet of the blow-out path which bends the flow direction of the blow-out fan approximately at right angles, and bends the flow direction of the blow-out fan approximately at right angles. In a uniform gas flow forming device that includes a suction rectifier installed at the inlet of an inlet path bent at right angles, the outlet rectifier has openings sequentially from the upstream side to the downstream side of the outlet. It is configured by installing a control part, a filter, and a honeycomb structure. 1
60-75% in zone, 30-40% in second zone
, 25% in the third zone and 10% in the fourth zone, and the suction rectifier is configured by installing at least an opening control section in the suction port, and the opening ratio of the opening control section is set to be 25% in the third zone and 10% in the fourth zone. For each zone of the suction port, which is divided into 1st to 3rd zones in order from the side farthest to the side closest to the fan,
The ratio is set to 100% in the zone, 30 to 70% in the second zone, and 10 to 25% in the third zone.

[Actions] According to the present invention as set forth in claim 1, there is the following effect (2).

■When blowing out by bending the flow direction of the blow-off fan roughly at right angles, the blow-out flow from the blow-off port tends to concentrate on the end side of the straight flow along the blow-out direction of the blow-off fan, in other words, on the side far from the blow-off fan. . However, according to the present invention, an aperture control section is provided in the outlet, and the aperture ratio of the fourth zone side far from the outlet fan is reduced, and the aperture ratio of the first zone side closer to the outlet fan is reduced. Expanded.

Since the aperture ratios of the first to fourth zones are changed to specific values as described above, it is possible to form a uniform blowout flow over the entire area of the blowout port in terms of pressure and flow velocity.

At this time, the distribution of the aperture ratio in the aperture control section changes as described above, so a high-speed blowout airflow is generated in some parts, and there is no flow in other parts, so that the outflow side of the aperture control section is This can create vortices and cause large pressure losses.

However, in the present invention, a filter made of nonwoven fabric or the like is provided on the outflow side of the aperture control section, so that the flow flowing out from the aperture control section is finely redistributed, preventing the generation of the above-mentioned vortices, and reducing pressure loss. It is possible to ensure uniformity of the flow while keeping the amount small.

In addition, in order for the uniform flow flowing out from the outlet to reach a long distance, it is necessary to prevent the generation of turbulent flow at the outlet surface of the outlet to reduce pressure loss. However, according to the present invention, by providing a honeycomb structure at the outlet of the blow-off port, the flow from each honeycomb is made equal to each other, thereby preventing the occurrence of the above-mentioned turbulent flow, reducing pressure loss, and achieving uniformity. You can secure the flight distance of the current.

That is, according to the present invention as set forth in claim 1, a simple structure,
Moreover, it is possible to configure a uniform gas flow forming device equipped with a blow-off rectifier with a small pressure loss, thereby realizing an improvement in energy efficiency and a reduction in noise.

According to the present invention as set forth in claim 2, there is the following effect (2).

■When suction is performed by bending the flow direction of the suction fan roughly at right angles, the suction flow to the suction port tends to concentrate on the side closer to the suction fan, which is a straight flow along the suction direction of the suction fan. However, according to the present invention, an aperture control section is provided in the suction port, and the aperture ratio of the third zone side of the suction port, which is closer to the suction fan, is reduced, and the aperture ratio of the first zone side, which is farther from the suction fan, is reduced. Expanded. Since the aperture ratios of the first to third zones are changed to specific values as described above, it is possible to form a suction flow that is uniform in pressure and flow velocity over the entire area of the suction port.

That is, according to the present invention as set forth in claim 2, a simple structure,
Moreover, it is possible to configure a uniform gas flow forming device equipped with a suction rectifier with a small pressure loss, thereby realizing improvement in energy efficiency and reduction in noise.

According to the present invention as set forth in claim 3, there is the following effect (2).

(2) A uniform gas flow forming device having the above effects (2) and (2) at the same time can be constructed, and it is possible to improve energy efficiency and reduce noise.

[Embodiment] Fig. 1 is a sectional view showing a uniform gas flow forming device according to an embodiment of the present invention, Fig. 2 is a front view showing an opening control section of a blow-out rectifying device, and Fig. 3 is a suction rectifying device. FIG. 3 is a front view showing an opening control section of the device.

- Modal gas flow forming device 10, as shown in FIG.
It is composed of 2.

- The persistent gas flow blowing device 11 and the uniform gas flow suction device 12 are provided facing each other on both sides of the smoking area, for example, and blow out uniform gas in a plane from the blowing device 11 at low speed. The gas is sucked in uniformly in a plane at low speed by the suction device 12.

However, in implementing the present invention, the basic gas flow blowing device 11 and the uniform gas flow suction device 12 can be used independently.

However, as shown in FIG.
A blowout port 23 is formed therein. And air intake 21
A blow-off fan 24 is installed inside the blow-off port 23, and a blow-off rectifier 25 is installed at the blow-off port 23. That is, the blowing device 1
No. 1 is a device in which a blowout path 22 is provided so that the direction of flow of a blowout fan 24 is bent at right angles, and a blowout rectifying device 25 is provided at a blowout port 23 of the blowout path 22.

At this time, the blowout rectifying device 25 sequentially includes an opening control section 26, a filter 27,
It is configured by installing a honeycomb structure 28.

As shown in FIG. 2, the aperture ratio of the aperture control section 26 is set from 1st to 4th in order from the side closer to the blowing fan 24 to the side farthest from the blowout fan 24.
For each zone of the air outlet 23, which is divided into three zones, the air pressure is set to 60 to 75% in the first zone, 30 to 40% in the second zone, 25% in the third zone, and 10% in the fourth zone. There is. As a result, the blowout device 11 prevents the blowout from the blowout fan 24 from concentrating on the end side of the straight flow along the blowout direction, and provides a uniform blowout over the entire area of the blowout port 23 in terms of pressure and flow velocity. Can form a flow.

In addition, in the aperture control section 26, all the first to fourth zones are formed by a perforated plate 26A. When the dimensions of the air outlet 23 are 1200 mm in width and 600 mm in height, approximately 1 in the height direction.
As a result of dividing into four zones every 50 to 200 square meters, suitable implementation results were obtained.

The filter 27 is made of non-woven fabric, clean clothed wire, etc., and narrows the flow distribution on the outflow side of the opening control section 26 to prevent the generation of vortices and ensure uniform flow while minimizing pressure loss. .

The honeycomb structure 28 equalizes the flow of air from the air outlet 23 between adjacent honeycombs, prevents the occurrence of turbulence on the outlet surface, reduces pressure loss, and ensures a uniform flow distance. do. Note that the honeycomb structure 28 is not limited to a hexagonal hole, but may be a square hole, a round hole, or the like.

Incidentally, the longer the cell length of the honeycomb structure 28, the greater the flight distance of the negative flow. When the cell diameter of the honeycomb structure 28 is 3 mm, if the cell length is 40+u+ or more, the uniform flow distance can be reduced to 1000-2001)e even at a low speed of 0.2-0.5 m/see. It can also be moved far away.

Next, the -like gas flow suction device 12 has an air outlet 31, a suction path 32, and a suction port 33 formed in a case 30, as shown in FIG. A suction fan 34 is installed inside the air exhaust port 31, and a suction rectifier 35 is installed at the suction port 33. That is, the -like gas flow suction device 12 is provided with a suction path 32 so as to bend the flow direction of a suction fan 34 at right angles, and a suction rectifier 35 is provided at the suction port 33 of the suction path 32.

At this time, the suction rectifying device 35 sequentially includes the opening control section 36, the filter 37,
It is configured by installing a honeycomb structure 38.

As shown in FIG. 3, the aperture ratio of the aperture control unit 36 is set from 1st to 3rd in order from the side farthest from the suction fan 34 to the side closest to the suction fan 34.
For each zone of the suction port 33, which is divided into three zones, the ratio is set to 100% in the first zone, 30 to 70% in the second zone, and 10 to 25% in the third zone. Thereby, the suction device 12 prevents the suction flow to the suction fan 34 from concentrating on the side close to the suction fan 34 in a linear flow along the suction direction, and maintains uniformity in pressure and flow velocity over the entire area of the suction port 33. It is possible to form a suction flow with a certain

Note that the aperture control section 36 uses the first zone with an aperture ratio of 100% as a mere hollow section, and the second and third zones as the perforated plate 3.
It is made of 6A. When the dimensions of the suction port 33 are 1200 mm in width and 600 mm in height, approximately 2 mm in the height direction.
As a result of dividing the above three zones into 00 mm increments, suitable implementation results were obtained.

The filter 37 is made of non-woven fabric, clean clothed wire, etc., and finely distributes the flow on the inflow side of the second zone and the third zone of the aperture control section 36.
This prevents the generation of vortices on the inlet side of the flow, ensuring uniform flow while minimizing pressure loss.

The honeycomb structure 38 equalizes the suction flow to the suction port 33 between adjacent honeycombs, prevents the occurrence of turbulent flow on the inlet surface, and ensures a uniform flow retrospective distance by reducing pressure loss. do. Note that the honeycomb structure 38 is not limited to a hexagonal hole, but may be a square hole, a round hole, or the like.

Next, the operation of the above-mentioned root gas flow forming device 10 will be explained.

■-Modernity In the gas flow blowing device 11, when blowing out by bending the flow direction of the blow-off fan 24 approximately at right angles, the blow-out flow from the blow-off port 33 is on the terminal side of the straight flow along the blowing direction of the blow-off fan 24. In other words, the air tends to be concentrated on the side far from the blowing fan 24. However, in this embodiment, an aperture control section 26 is provided in the outlet 23 to reduce the aperture ratio of the fourth zone of the outlet 23 that is far from the outlet fan 24, and to reduce the aperture ratio of the fourth zone of the outlet 23 that is far from the outlet fan 24. The aperture ratio on the side was expanded. Since the aperture ratios of the first to fourth zones are changed by the specific values as described above, it is possible to form a uniform blowout flow over the entire area of the blowout port 23 in terms of pressure and flow velocity.

At this time, since the distribution of the aperture ratio in the aperture control section 26 changes as described above, a high-speed blowout airflow is generated in some parts, and there is no flow in other parts, so that the aperture control part 26
There is a possibility that a vortex may be generated on the outflow side of the pipe 6, resulting in a large pressure loss. However, in this embodiment, the opening control section 2
Since a filter 27 made of non-woven fabric or the like is provided on the outflow side of the opening control section 26, the flow outflowing from the opening control section 26 is finely redistributed, preventing the generation of the above-mentioned vortices, and ensuring a uniform flow while minimizing pressure loss. It is possible to ensure that

Furthermore, in order for the uniform flow flowing out from the outlet 23 to reach a long distance, it is necessary to prevent turbulence from occurring at the outlet surface of the outlet 23 to reduce pressure loss. However, in this embodiment, the honeycomb structure 28 is provided at the outlet of the blow-off port 23 to equalize the flow from each honeycomb, prevent the above-mentioned turbulent flow, and reduce pressure loss. A uniform flight distance can be ensured.

- When the air flow suction device 12 bends the flow direction of the suction fan 34 approximately at right angles, the suction flow to the suction port 33 is a straight flow along the suction direction of the suction fan 34. It is easy to concentrate on the side closest to . However, in this embodiment, an aperture control section 36 is provided in the suction port 33 to reduce the aperture ratio on the third zone side of the suction port 33 that is closer to the suction fan 34, and to Expanded the aperture ratio on the zone side.

Since the aperture ratios of the first to third zones are changed by the specific values as described above, it is possible to form a suction flow that is uniform over the entire area of the suction port 33 in terms of pressure and flow velocity.

At this time, since the distribution of the aperture ratio in the aperture control section 36 changes as described above, a high-speed suction airflow is generated in some parts, and there is no flow in other parts, so that the aperture control part 3
There is a possibility that a vortex may be generated on the inflow side of 6, resulting in a large pressure loss. However, in this embodiment, the opening control section 3
Since a filter 37 made of non-woven fabric or the like is provided on the inflow side of the opening control section 6, the flow flowing into the opening control section 36 is finely distributed in advance, preventing the generation of the above-mentioned vortices, and ensuring a uniform flow while minimizing pressure loss. It is possible to ensure that

In addition, in order to make the uniform flow flowing into the suction port 33 trace back to a long distance, it is necessary to prevent the generation of turbulent flow at the inlet surface of the suction port 33 to reduce pressure loss. However, in this embodiment, since the honeycomb structure 38 is provided at the inlet of the suction port 33, the flow to each honeycomb is equalized, the above-mentioned turbulent flow is prevented, and the pressure loss is minimized. It is possible to ensure the retrospective distance of the situation.

(2) Therefore, according to the - radical gas flow forming device 1O, it has a simple structure as a result of simultaneously having the above-mentioned action (2) by the -modal gas flow blowing device 11 and the above-mentioned action (2) by the - radical gas flow suction device 12. In addition, a uniform gas flow forming device 10 with small pressure loss can be constructed.

As a result, a high-performance uniform gas flow forming device 1o is created using a small-power, low-head blowout fan 24 and suction fan 34.
can be configured to improve energy efficiency and reduce noise.

Further, the thickness of each of the -uniform gas flow blowing device 11 and the uniform gas flow suction device 12 can be kept within 60 mm,
Can be made thinner than conventional products. At this time, each rectifier 25.
The thickness of 35 is about 10-60mm, each rectifier 25.3
The thickness of the blowout path 22 and suction path 32 behind 5 is 4.
It is about 0 mg+.

Incidentally, in carrying out the present invention, the -like gas flow suction device 1
2, it is not essential to provide the filter 37 and the honeycomb structure 38.

[Effects of the Invention] As described above, according to the present invention, a uniform gas flow forming device with a simple structure and small pressure loss can be constructed, and energy efficiency and noise reduction can be realized.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing a uniform gas flow forming device according to an embodiment of the present invention, FIG. 2 is a front view showing an opening control section of a blow-off rectifier, and FIG. 3 is an opening control of a suction rectifier. FIG. DESCRIPTION OF SYMBOLS 10...- Root gas flow formation device, 11...- Modal gas flow blowing device, 12...- Modal gas flow suction device, 22... Blow-off route, 23... Blow-off port, 24 ...Blowout fan, 25...Blowout rectifier, 26... Opening control section, 27... Filter, 28... Honeycomb structure, 32... Suction path, 33... Suction port, 34... Suction fan, 35... Suction rectifier, 36... Opening control section.

Claims (3)

[Claims] (1) In a uniform gas flow forming device configured by providing a blow-out rectifying device at the blow-off port of the blow-off path in which the flow direction of the blow-off fan is bent approximately at right angles,
The blowout rectifier is configured by installing an aperture control section, a filter, and a honeycomb structure sequentially from the upstream side to the downstream side of the blowout port, and the aperture ratio of the aperture control section is set sequentially from the side close to the blowout fan to the side far away from the blowout fan. For each zone of the air outlet divided into 1st to 4th zones, 60 to 75% in the first zone and 60 to 75% in the second zone.
30-40% in the zone, 25% in the third zone, 4th zone
A uniform gas flow forming device characterized in that the uniform gas flow is set to 10% in the zone. (2) In a uniform gas flow forming device configured by providing a suction rectifier at the suction port of a suction path in which the flow direction of the suction fan is bent approximately at right angles,
The suction rectifier is configured by installing at least an aperture control section at the suction port, and the aperture ratio of the aperture control section is divided into each zone of the suction port, which is divided into first to third zones in order from the side farthest from the suction fan to the side close to the suction fan. 100% in the first zone,
30-70% in the second zone, 10-2 in the third zone
A uniform gas flow forming device characterized in that the uniform gas flow is set to be 5%. (3) A blow-off rectifier is installed at the outlet of the blow-out path, which bends the flow direction of the blow-out fan at roughly a right angle to blow air, and the blow-off fan blows air by bending the flow direction of the blow-off fan at roughly a right angle. In a uniform gas flow forming device configured by providing a suction rectifying device at the suction port of the blowing path, the blowing rectifying device sequentially includes an opening control section, a filter, and a honeycomb structure from the upstream side to the downstream side of the blowing port. The aperture ratio of the aperture control section is 60 to 75 in the first zone for each zone of the air outlet, which is divided into 1st to 4th zones from the side closest to the blowout fan to the side farthest from the blowout fan.
%, 30-40% in the second zone, 25 in the third zone
%, and 10% in the fourth zone, and the suction rectifier is configured by installing at least an opening control section at the suction port, and the opening ratio of the opening control section is set to be 10% from the side far from the suction fan. For each zone of the suction port, which is divided into 1st to 3rd zones in order from side to side, 100% in the 1st zone,
30-70% in the second zone, 10-2 in the third zone
A uniform gas flow forming device characterized in that the uniform gas flow is set to be 5%.