JPH0484052A - Uniform gas flow generating device - Google Patents

Abstract

PURPOSE:To generate a low speed uniform flow by a method wherein a discharge flow straightening device is formed such that a porous plate, a filter, and a honeycomb structure are arranged, in order, from a discharge port toward the downstream side, and the porous plate is arranged in an inclining state such that it obliquely crosses a flow from a fan. CONSTITUTION:When discharge is effected in a state that the direction of a flow from a discharge fan 24 is bent approximately at right angles, a porous plate 26 is located in a discharge port 23, and the porous plate 26 is arranged obliquely to a flow from the discharge fan 24. A flow is not centralized to the terminal end side, and is orderly discharged toward the discharge port 23 side through the hole parts of the porous plate 26 with which the flow is collided in the middle of a route. A filter 27 formed of a non-woven cloth is located on the outflow side of the porous plate 26, an outflow flow is finely re-distributed to prevent the generation of a vortex, incurring of a pressure loss is reduced, and uniformity of a flow is ensured. A honeycomb structure 28 is located to the outlet of the discharge port 23, a flow through each honeycomb is uniformized, a turbulent flow is prevented from generation, incurring of a pressure loss is decreased, and a flying distance of an uniform flow is ensured.

Description

[Detailed Description of the Invention] [Industrial Application Fields] The present invention is applicable to the recovery, dust collection, and removal of scum, paper, mist, fume, dust, etc. in factories, and the collection and purification of smoking smoke in offices. 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 gas pressure and flow velocity are uniform on a plane, the blowout route was created by bending the flow direction of the blowout fan at right angles. It has been proposed that a blow-off rectifier is installed at the air outlet, and (2) a suction rectifier is installed at the suction port of a suction path in which the flow direction of the suction fan is bent at right angles.

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

In particular, if the air outlet spans a long range from the side close to the blow-off fan to the far side, or if the suction port spans a long range from the side far from the suction fan to the side close to the fan, the soft air outlet or suction port It is extremely difficult to form a low-velocity, uniform flow over the entire area.

The present invention provides a blowout flow from an outlet provided over a long range from a side close to a blowout fan to a side far away from the blowout fan, and/or
Alternatively, the purpose is to form a low-speed uniform flow in the suction flow to the suction port provided over a long range from the side far from the suction fan to the side close to the suction fan.

[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 a device for forming a uniform gas flow, the blow-off rectifying device is configured by installing a perforated plate, a filter, and a honeycomb structure in order from the upstream side to the downstream side of the blow-off port, and the blow-off rectifying device is configured by installing a perforated plate, a filter, and a honeycomb structure in order from the upstream side to the downstream side of the blow-off port, and the blow-off rectifying device It is arranged so that it is obliquely arranged.

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 zones 1 to 4 in order from the side farthest to the side close to the suction fan. every 1st
80-100% in zone, 8-25% in second zone
, 4-15% in zone 3, 1-8 in zone 4
%.

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 porous holes sequentially arranged from the upstream side to the downstream side of the outlet. The suction rectifier is configured by installing a plate and a filter honeycomb structure, and is arranged at an angle so as to cross the flow from the perforated plate or the blowing fan, and the suction rectifier is configured by installing at least an opening control part at the suction port. , the opening ratio of the opening control section is 80 to 100% in the first zone for each zone of the suction port, which is divided into 1st to 4th zones in order from the side farthest to the side close to the suction fan.
, 8-25% in the second zone and 4-15% in the third zone.
%, and in the fourth zone, it is set to 1 to 8%.

Note that the aperture ratio represents the aperture ratio per area of each zone.

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

■When blowing air by bending the flow direction of the blowing fan roughly at right angles, the blowing flow from the blowing fan tends to concentrate on the end side of the blowing path along the blowing direction of the blowing fan, in other words, on the side far from the blowing fan. .

However, according to the present invention, a perforated plate is provided at the outlet,
Since the perforated plate is arranged at an angle so as to cross the flow from the blowout fan, the flow does not concentrate at the end of the blowout path, but flows from the hole portion of the perforated plate that collides in the middle of the blowout path to the blowout port. As a result, a uniform blowout flow is formed over the entire area of the blowout port in terms of pressure and flow.

At this time, on the outflow side of the perforated plate, due to the distribution of the holes in the perforated plate, a high-speed blowout flow is generated in some parts, and there is no flow in other parts, and there is a vortex on the outflow side of the perforated plate. There is a risk that this may cause a large pressure loss. However, according to the present invention, a filter made of nonwoven fabric or the like is provided on the outflow side of the perforated plate to finely redistribute the flow flowing out from the perforated plate, thereby preventing the generation of the above-mentioned vortices and reducing pressure loss. Although it is small, it is possible to ensure uniformity of the flow.

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, a honeycomb structure is provided at the outlet of the outlet to equalize the flow from the two cams to each other, thereby preventing the occurrence of the above-mentioned turbulent flow, and reducing the pressure loss. You can secure the flight distance of the flow of the shape.

That is, according to the present invention as set forth in claim 1, a simple structure,
It also constitutes a uniform gas flow forming device equipped with a blow-off rectifier with a small pressure loss, and the blow-off flow from the blow-off port provided over a long range from the side close to the blow-off fan to the side far from the blow-off fan has a low speed uniformity. It can shape the style.

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 opening control section is provided in the suction port, and the opening ratio of the fourth zone side of the suction port, which is closer to the suction fan, is reduced, and the opening ratio of the first zone side, which is farther from the suction fan, is reduced. Expanded. Since the aperture ratios of the first to fourth zones are changed to specific values as described above, a suction flow is formed 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,
It also constitutes a uniform gas flow forming device equipped with a suction rectifier with a small pressure loss. You can form a style.

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

■It constitutes a uniform gas flow forming device that simultaneously has the effects of ■ and ■ above, and the blow-off flow from the blow-off port is provided over a long range from the side close to the blow-off fan to the side far from the blow-off fan, and the side far from the suction fan. A low-velocity, uniform flow can be formed in the suction flow to the suction port, which is provided over a long range on the near side.

[Example] Fig. 1 is a schematic diagram showing a uniform gas flow forming device according to an embodiment of the present invention, and Fig. 2 is a schematic diagram showing a blow-out rectifying device.
FIG. 3 is a schematic diagram showing the suction rectifier.

As shown in FIG.
It is composed of 2.

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

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, the basic gas flow blowing device 11 is as shown in FIGS.
As shown in the figure, an air intake port 21, a blowout path 22, and a blowout port 23 are formed in the case 20. A blowout fan 24 is installed on the inlet side of the air intake port 21, and a blowout rectifier 25 is installed at the blowout port 23. That is, the blowing device 11 is provided with a blowing path 22 so as to bend the flow direction of a blowing fan 24 at right angles and blowing air out, and a blowing rectifying device 25 is provided at the blowing outlet 23 of the blowing path 22.

At this time, the blowout rectifier 25 is configured by installing a perforated plate 26, a filter 27, and a honeycomb structure 28 in order from the upstream side to the downstream side of the blowout port 23.

The opening control section 26 is arranged to be oblique to the flow of the blowing fan 24 . The distribution of the holes provided in the perforated plate 26 may be configured such that: (1) the opening ratio is the same from the side close to the blowing fan 24 to the side far from the blowing fan 24, or (2) the opening ratio is set sequentially from the side near the blowing fan 24 to the side far from the blowing fan 24. It may be configured to be small. Note that the air volume of the root gas flow blowing device 11 can be determined by the size and pitch of the holes provided in the perforated plate 26.

The filter 27 is made of non-woven fabric, clean tart wire, etc., and narrows the flow distribution on the outflow side of the perforated plate 26 to prevent the generation of eddies, thereby ensuring uniformity of flow while reducing pressure loss.

In addition, the filter 27 has a filter support mesh 27A,
27B is sandwiched and installed to prevent the filter constituent materials from scattering.

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 flying distance of the negative flow. When the cell diameter of the honeycomb structure 28 is 3 mm, if the cell length is 40 mm or more, the flight distance of uniform flow can be 1000 to 2000 l even at a low speed of 0.2 to 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 FIGS. 1 and 3. Then, a suction fan 34 is installed on the outlet side of the air outlet 31, and
3, a suction rectifier 35 is installed. 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 rectifier 35 is configured by installing an opening control section 36 and a filter 37 sequentially from the downstream side to the upstream side of the suction port 33.

The opening ratio of the opening control unit 36 is 80% to 100% in the first zone for each zone of the suction port 33, which is divided into 1st to 4th zones from the side farthest to the side closest to the suction fan 34.
Preferably 90-100%, 8-25% in the second zone
, preferably 10-18%, 4-15% in the third zone
, preferably 6 to 8%, and 1 to 8% in the fourth zone, preferably 2 to 4%. 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. A certain suction flow can be formed.

In addition, the opening control part 36 forms the 1st - 4th zone with a perforated plate. However, if the first aperture ratio is 100%, it may be a hollow portion.

The filter 37 is made of non-woven fabric, clean tart wire, etc., and finely distributes the flow on the inflow side of the second to fourth zones 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.

Note that the filter 37 has a filter support mesh 37A.
, 37B are sandwiched together to prevent the filter constituent materials from scattering.

In addition, in the basic gas flow suction device 12, a honeycomb structure may be installed further upstream of the filter 37. This two-cam structure is the suction port 33
This equalizes the suction flow between adjacent honeycombs, prevents turbulence from occurring at the inlet face, minimizes pressure loss, and ensures a uniform flow path. Note that the honeycomb structure is not limited to hexagonal holes, and may have square holes, round holes, etc.

Next, the operation of the above-mentioned -like 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 blowing fan 24 approximately at right angles, the blowing from the blowing fan 24 is at the end of the blowing path along the blowing direction of the blowing fan 24. In other words, it tends to concentrate on the side far from the blowing fan 24.

However, in this embodiment, the perforated plate 26 is provided at the air outlet 33, and the perforated plate 26 is arranged obliquely so as to cross the flow from the air blowing fan 24, so that the air flow is directed to the terminal side of the air blowing path. The blowout flow is not concentrated and flows sequentially toward the blowout port 23 from the hole portion of the perforated plate 26 that collides in the middle of the blowout path, and as a result, the blowout flow is uniform over the entire area of the blowout port 23 in terms of pressure and flow velocity. can be formed.

At this time, on the outflow side of the perforated plate 26, due to the distribution of the holes in the perforated plate 26, a high-speed blowout flow is generated in some parts, and there is no flow in other parts. There is a risk that vortices may be generated and a large pressure loss may occur. However, in this embodiment, since the filter 27 made of nonwoven fabric or the like is provided on the outflow side of the perforated plate 26, the perforated plate 26
It is possible to finely redistribute the flow flowing out of the pipe, prevent the generation of the above-mentioned vortices, and ensure uniformity of the flow while reducing pressure loss.

In addition, in order for the uniform flow flowing out from the outlet 23 to reach a long distance, it is necessary to prevent the generation of turbulent flow at the outlet surface of the outlet 23 to reduce pressure loss. However, in this embodiment, since the honeycomb structure 28 is provided at the outlet of the blow-off port 23, the flow from each honeycomb is made equal to each other, preventing the above-mentioned turbulent flow, and reducing the pressure loss. You can secure the flight distance of the flow of the shape.

- 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 opening control section 36 is provided in the suction port 33, and the suction fan 3 is provided in the suction port 33.
The aperture ratio on the side of the fourth zone, which is close to 4, is reduced, and the aperture ratio on the side of the first zone, which is far from the suction fan 34, is increased. Since the aperture ratios of the first zone to the fourth zone are changed by the specific values as described above, a suction flow with uniform pressure and flow velocity can be formed over the entire area of the suction port 33.

At this time, since the distribution of the aperture ratio in the aperture control section 36 changes as described above, a high-speed suction flow occurs in some parts, and there is no flow in other parts, so that the inflow of the aperture control part 36 There is a possibility that vortices will be generated on the side and a large pressure loss will occur. However, in this embodiment, a filter 37 made of nonwoven fabric or the like is provided on the inflow side of the aperture control section 36 to finely distribute the flow flowing into the aperture control section 36 in advance, thereby preventing the generation of the above-mentioned vortices. This makes it possible to ensure uniformity of flow while minimizing pressure loss.

(2) Therefore, according to the --like gas flow forming device 10, the blowing fan 2 In the blowout flow from the blowout port 23 provided over a long range from the side near to the side far from the suction fan 34, and the suction flow to the suction port 33 provided over a long range from the side far from the suction fan 34 to the side close to the suction fan 34,
A low velocity uniform flow can be formed.

Hereinafter, specific implementation results of the present invention will be explained.

(a) Dimensions of the blowout rectifier case 20: 300mm (height) x 170mm
hm (length) x loomm (depth). The thickness of the filter 27 was 10 mm, and the thickness of the honeycomb structure 28 was 20 mm.

As a result of the experiment according to (a) above, as shown in Table 1, a low-velocity uniform flow was formed in the air flow from the air outlet provided over the length from the side close to the blow-off fan to the far side. It came.

(b) Dimensions of suction rectifier case 30: 300mm (height) x 100
The dimensions were 0 mm (length) x 100 mm (depth).

As a result of the experiment according to (b) above, as shown in Table 2, it was found that a low-velocity uniform flow was formed in the suction flow to the suction port provided over a long distance from the side far from the suction fan to the side close to the suction fan. did it.

[Effects of the Invention] As described above, according to the present invention, the air flow from the air outlet provided over a long range from the side close to the air blowing fan to the side far from the air blowing fan, and/or from the side far from the suction fan to the side near the air blowing fan. In the suction flow to the suction port provided over a long range, it is possible to form a uniform flow at a low velocity.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing a uniform gas flow forming device according to an embodiment of the present invention, FIG. 2 is a schematic diagram showing a blowout rectifying device,
FIG. 3 is a schematic diagram showing the suction rectifier. DESCRIPTION OF SYMBOLS 10...- Modal gas flow forming device, 11...- Modal gas flow blowing device, 12...- Root gas flow suction device, 22... Blow-off route, 23... Blow-off port, 24 ...Blowout fan, 25...Blowout rectifier, 26... Porous plate, 27... Filter 28... Honeycomb structure, 32--Suction path, 33... Suction port, 34... - Suction fan, 35... Suction rectifier, 36... Opening control section. Agent Patent Attorney Osamu Shiokawa Figure 1

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 a perforated plate, a filter, and a honeycomb structure in order from the upstream side to the downstream side of the blowout port, and the perforated plate is arranged at an angle so as to cross the flow from the blowout fan. A uniform gas flow forming device characterized by: (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 zones 1 to 4 in order from the side farthest to the side close to the suction fan. 80 to 10 in the first zone
0%, 8-25% in the second zone, 4-25% in the third zone
15%, and 1 to 8% in the fourth zone. (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 rectifier at the suction port of the blow-in route, the blow-off rectifier includes a perforated plate, a filter, and a honeycomb structure in order from the upstream side to the downstream side of the blowout port. The perforated plate is arranged obliquely to intersect the flow from the blowout fan, and the suction rectifier is constructed by installing at least an opening control section at the suction port, The rate is 80% to 100% in the first zone and 80% in the second zone for each zone of the suction port, which is divided into 1st to 4th zones in order from the side farthest to the side closest to the suction fan.
25% in the third zone, 4 to 15% in the fourth zone, and 1 to 8% in the fourth zone.