JP2000320875A - Ventilation equipment - Google Patents

Abstract

(57) [Summary] [PROBLEMS] In a tornado-type ventilator, it is possible to adjust the supply / exhaust flow rate at the installation site and to enable each swirling airflow in the supply / exhaust direction regardless of the restriction of the supply / exhaust facilities on site. Generate as effectively as possible to improve exhaust performance. An air supply swirl space (3, 16) into which external air is introduced via an air supply duct (6).
The exhaust passages 4 and 7 are provided inside the exhaust passage 16 and discharge the internal air to the outside.
An air outlet 11 for blowing air in a swirling direction through the air passage, and an opening at a lower end side of the exhaust passages 4 and 7, and a predetermined local area of air is sucked into the exhaust passages 4 and 7 in a swirling vortex state. In a ventilating apparatus provided with an air inlet 13 for supplying air, an air supply flow adjusting means 20 for adjusting an air supply flow supplied to the air supply swirling spaces 3 and 16 through the air supply duct 6.
A and an exhaust flow rate adjusting means 20B for adjusting an exhaust flow rate exhausted through the exhaust passages 4 and 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention can effectively exhaust air in a specific local area to the outside by generating a spiral swirling vortex in a direction opposite to a supply direction and an exhaust direction. The present invention relates to such a ventilation device.

[0002]

2. Description of the Related Art As one method for exhausting contaminated air or the like in a specific local area, for example, blast air spirally blown downward from above and intake air sucked in a central portion thereof in the opposite direction. A so-called tornado-type ventilator that generates a spiral intake vortex that rises in the exhaust direction in relation to the negative pressure has been conventionally used.

[0003] For example, Japanese Patent Application Laid-Open No. 4-140
And Japanese Patent Application Laid-Open No. 9-42734.

First, Japanese Patent Application Laid-Open No. 4-140 discloses that
An exhaust hood is provided at an upper portion of the exhaust target space, and an exhaust port connected to an exhaust fan is formed at a central portion of the exhaust hood, and a lower surface of the exhaust hood has a tangential direction on the same circumference as the center of the exhaust port. An exhaust device that ejects air to generate a spiral airflow that rises spirally by the ejected air and the suction negative pressure from the exhaust port, and exhausts the air in the exhaust target space by the spiral airflow. A first discharge port for discharging air in a tangential direction on the same circumference as the center of the exhaust port on the lower surface of the supply chamber while fixing an air supply chamber to a lower outer peripheral portion of the exhaust hood; A second jet port for jetting air toward the lower floor surface is alternately arranged at a fixed interval, and air from the second jet port is jetted appropriately toward the floor surface. As a result, from the first jet port While not disturb the helical rising spiral air flow generated by the negative suction pressure from injected air and the exhaust port to the tangential direction of the center and the same circumference of the serial outlet,
The helical spiral airflow is configured to efficiently exhaust the space to be evacuated.

In Japanese Unexamined Patent Application Publication No. 9-42734, the above-described helical spiral airflow exhaust device is applied to an exhaust device such as smoke of a cooking appliance such as a gas stove to perform effective exhaust. It is configured as follows.

[0006]

The tornado ventilator described above has the following difficult problems.

That is, in order to ensure effective exhaust performance and perform efficient ventilation, the absolute amount of each of the supply air flow and the exhaust air flow blown around the target area, and the supply air flow and the exhaust air flow. It is necessary that the relationship between the air supply and the exhaust gas is appropriate, but in practice, the appropriate air supply and exhaust air volume depends on the constraints of the local air supply and exhaust equipment (duct diameter, duct length, duct shape, fan capacity, etc.). Setting may be difficult. In such a case, it is difficult to generate an effective blowing swirl. In addition, the generation of the swirling vortex in the exhaust direction formed on the inside becomes insufficient, so that there is a problem that the exhaust performance cannot be achieved as designed.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is possible to adjust the amount of supply / exhaust air independently of each other regardless of the restrictions on the supply / exhaust facilities at the site, thereby achieving a more stable operation. And effectively generates a spiral swirling blowing vortex, and generates an effective suction negative pressure inside the center axis direction thereof to generate a spirally rising effective intake swirling vortex. It is an object of the present invention to provide a ventilation device having high exhaust performance.

[0009]

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

(1) The ventilating apparatus according to the first aspect of the present invention includes the supply air swirling spaces 3 and 16 into which external air is introduced via the air supply duct 6, and the air supply swirl spaces 3 and 16. Exhaust passages 4 and 7 that are provided inside the air supply and discharge the internal air to the outside, and are provided at the lower end side opening surfaces of the air supply swirl spaces 3 and 16 and are provided with the swirl flow generating stators 12 and 1.
Air outlet 1 that blows air in the turning direction via 2 ...
1, provided on the lower end side opening surface of the exhaust passages 4, 7;
In a ventilator provided with an air inlet 13 for sucking air in a predetermined local area in a swirling state in the exhaust passages 4, 7, the flow rate of exhaust gas exhausted through the exhaust passages 4, 7 is adjusted. An exhaust flow rate adjusting means 20B is provided.

Therefore, in this configuration, the air supply is first introduced into the air supply swirling spaces 3 and 16 via the air supply duct 6,
A swirling vortex is formed that spirally recirculates around the exhaust passages 4 and 7 through the supply air swirling spaces 3 and 16.

Then, the swirling vortex flows through the swirling flow generating stators 12, 12,.
After a more sufficient vector of the turning direction is given, the air outlet 11 forms a swirling vortex with a stable speed and direction and is smoothly blown in the turning direction.

Therefore, the air flow blown out from the air outlet 11 becomes an effective spiral swirl flow having a stable flow velocity and a stable swirling direction, and is directed toward the air suction port 13 of the exhaust passages 4 and 7 on the inner side. As a result, an upward swirling vortex having sufficient exhaust performance is generated.

Further, in that case, an exhaust flow rate adjusting means 20B for adjusting the exhaust flow rate exhausted through the exhaust passages 4 and 7 is provided.

[0015] Therefore, regardless of the restrictions on the on-site air supply and exhaust equipment, the exhaust air flow rate suitable for generating the supply and exhaust swirl that is most effective for the air supply flow rate supplied through the air supply duct 6. Can be appropriately adjusted and set.

(2) The ventilating apparatus according to the present invention is characterized in that the supply air swirling spaces 3 and 16 into which external air is introduced via the air supply duct 6 and the supply air swirling spaces 3 and 16 Exhaust passages 4 and 7 provided on the inside and discharging the internal air to the outside, and swirl flow generating stators 12 and 1 provided on the lower end side opening surfaces of the air supply swirling spaces 3 and 16.
Air outlet 1 that blows air in the turning direction via 2 ...
1, provided on the lower end side opening surface of the exhaust passages 4, 7;
In the ventilating apparatus having an air suction port 13 for sucking the air in a predetermined local area in a swirling vortex state in the exhaust passages 4, 7, the air supply swirling space 3,
16 is provided with an air supply flow rate adjusting means 20A for adjusting the air supply flow rate supplied to the inside.

Therefore, in this configuration, the air supply is first introduced into the air supply swirl spaces 3 and 16 via the air supply duct 6,
A swirling vortex is formed that spirally recirculates around the exhaust passages 4 and 7 through the supply air swirling spaces 3 and 16.

Then, the swirling vortex flows through the swirling flow generating stators 12, 12,.
After a more sufficient vector of the turning direction is given, the air outlet 11 forms a swirling vortex with a stable speed and direction and is smoothly blown in the turning direction.

Therefore, the air flow blown out from the air outlet 11 becomes an effective spiral swirling flow having a stable flow velocity and swirling direction, and is directed toward the air inlet 13 of the exhaust passages 4 and 7 on the inner side. As a result, an upward swirling vortex having sufficient exhaust performance is generated.

Further, in this case, there is provided an air supply flow rate adjusting means 20A for adjusting the air supply flow rate supplied into the air supply swirling spaces 3, 16 via the air supply duct 6.

For this reason, the flow rate of the air supplied through the air supply duct 6 is adjusted irrespective of the restrictions on the on-site air supply / exhaust facilities, and the air supply / exhaust swirling flow most effective with respect to the air flow rate is generated. Thus, it is possible to appropriately adjust and set the supply flow rate suitable for the above.

(3) The ventilating apparatus according to the third aspect of the present invention provides the air supply swirling spaces 3, 16 into which external air is introduced via the air supply duct 6, and the air supply swirl spaces 3, 16 Exhaust passages 4 and 7 provided on the inside and discharging the internal air to the outside, and swirl flow generating stators 12 and 1 provided on the lower end side opening surfaces of the air supply swirling spaces 3 and 16.
Air outlet 1 that blows air in the turning direction via 2 ...
1, provided on the lower end side opening surface of the exhaust passages 4, 7;
In the ventilating apparatus having an air suction port 13 for sucking the air in a predetermined local area in a swirling vortex state in the exhaust passages 4, 7, the air supply swirling space 3,
The system is provided with an air supply flow rate adjusting means 20A for adjusting the air supply flow rate supplied to the inside 16 and an exhaust flow rate adjusting means 20B for adjusting the exhaust gas flow rate exhausted through the exhaust passages 4 and 7. .

Therefore, in this configuration, the air supply is first introduced into the air supply swirling spaces 3 and 16 via the air supply duct 6,
A swirling vortex is formed that spirally recirculates around the exhaust passages 4 and 7 through the supply air swirling spaces 3 and 16.

Then, the swirling vortex flows through the swirling flow generating stators 12, 12.
After a more sufficient vector of the turning direction is given, the air outlet 11 forms a swirling vortex with a stable speed and direction and is smoothly blown in the turning direction.

Therefore, the air flow blown out from the air outlet 11 becomes an effective spiral swirling flow having a stable flow velocity and swirling direction. As a result, an upward swirling vortex having sufficient exhaust performance is generated.

Further, in this case, the air supply flow rate adjusting means 20A for adjusting the air supply flow rate supplied into the air supply swirling spaces 3 and 16 through the air supply duct 6 and the exhaust passages 4 and 7 are provided. Exhaust flow rate adjusting means 20B for adjusting the flow rate of exhaust gas to be exhausted.

Therefore, irrespective of the restrictions on the on-site air supply / exhaust facilities, the absolute amount of each air supply / exhaust flow supplied through the air supply duct 6 and exhausted through the exhaust passages 4, 7 and their mutual amounts The relative amount between them can be appropriately adjusted and set to a flow rate suitable for generating the most effective supply / exhaust swirl flow.

(4) The ventilating apparatus according to the present invention, in the ventilating apparatus according to the first aspect of the present invention, comprises an exhaust flow rate detecting means for detecting an exhaust flow rate discharged through the exhaust passages 4 and 7. 17B and 34B are provided.

Therefore, in this configuration, the adjustment setting of the exhaust flow rate with respect to the supply air flow rate is performed by the exhaust flow rate detecting means 1.
This is appropriately performed according to the exhaust gas detection flow rate detected by 7B and 34B.

Therefore, regardless of the restrictions on the on-site air supply / exhaust facilities, the exhaust flow rate suitable for generating the most effective supply / exhaust swirl flow with respect to the air supply rate supplied via the air supply duct 6. Can be appropriately and easily adjusted and set.

(5) The ventilating apparatus according to the fifth aspect of the present invention, in the configuration according to the second aspect, detects an air supply flow rate supplied through the air supply duct 6. Means 17A and 34A are provided.

Therefore, in this configuration, the adjustment setting of the supply air flow with respect to the exhaust gas flow is performed by the supply air flow detecting means 1.
This is performed appropriately in accordance with the detected air supply flow rate detected by 7A and 34A.

Therefore, regardless of the restrictions on the on-site air supply / exhaust facilities, the air supply suitable for generating the supply / exhaust swirling flow most effective for the exhaust flow rate discharged through the exhaust ducts 4,7. The flow rate can be appropriately and easily adjusted and set.

(6) The ventilating apparatus according to the sixth aspect of the present invention, in the configuration according to the third aspect, detects an air supply flow rate supplied through the air supply duct 6. Means 17A and 34A and exhaust flow rate detecting means 17B and 34B for detecting the flow rate of exhaust gas discharged through the exhaust passages 4 and 7 are provided.

Therefore, in this configuration, the setting of the absolute value of each of the supply and exhaust flow rates and the adjustment of the relative flow rate between them are detected by the supply and discharge flow rate detecting means 17A and 34A and the exhaust flow rate detecting means 17B and 34B, respectively. This is appropriately performed according to each detected flow rate value.

For this reason, the absolute flow rate and the relative flow rate suitable for generating the most effective intake swirling airflow between the supply and exhaust flow rates are appropriately and easily adjusted and set regardless of the restrictions on the on-site supply and exhaust equipment. Will be able to do it.

(7) The invention according to claim 7 The ventilating apparatus according to the present invention is characterized in that the ventilating apparatus according to claims 1, 2, 3, 4, 5
Alternatively, in the configuration of the invention described in 6, the exhaust flow rate is adjusted and set so as to be larger than the supply air flow rate.

Therefore, in this configuration, the suction force in the exhaust direction is larger, and the installed room tends to have a negative pressure.
Contaminated air is prevented from leaking out of the room.

(8) The invention according to claim 8 The ventilating apparatus according to the present invention is characterized in that the above-mentioned claims 1, 2, 3, 4, 5
Alternatively, in the configuration of the invention described in Item 6, the supply flow rate is adjusted and set so as to be larger than the exhaust flow rate.

Therefore, in this configuration, the layer of the spiral air curtain flow blown into the room becomes thick, and the diffusion of contaminated air to the outside is suppressed.

(9) The ventilating apparatus according to the ninth aspect of the present invention is the ventilating apparatus according to the first, third, fourth, sixth or seventh aspect of the present invention, wherein
0B is provided between the exhaust fan 9 provided on the discharge end side of the exhaust passages 4 and 7 and the air suction port 13 side.

Therefore, in this configuration, the adjustment operation can be easily performed, and the adjustment and setting operation of the exhaust gas flow rate on site can be easily performed.

(10) The ventilating apparatus according to the tenth aspect of the present invention, in the configuration according to the second, third, fifth, sixth or eighth aspect, wherein the air supply flow rate adjusting means 2 is provided.
0A is provided between the air supply fan 8 provided on the outside air suction end side of the air supply duct 6 and the air supply swirling spaces 3 and 16.

Therefore, in this configuration, it is easy to perform the adjusting operation, and it is easy to adjust the supply air flow rate on site.

(11) The invention according to claim 11 The ventilating apparatus according to the present invention provides the ventilation apparatus according to claims 1, 3, 4, 6, and 7.
Alternatively, in the configuration of the invention described in 9, the exhaust flow rate adjusting means 20B is formed by a variable damper 42 capable of changing an opening / closing angle.

Therefore, in this configuration, the exhaust flow rate can be arbitrarily adjusted and set easily and at low cost by the variable damper 42.

(12) The invention of claim 12 The ventilating apparatus of the present invention provides the above-mentioned ventilation apparatus.
Alternatively, in the configuration of the invention described in 10, the supply air flow rate adjusting means 20A is formed by a variable damper 42 capable of changing an opening / closing angle.

Accordingly, in this configuration, the variable damper 42 can easily and arbitrarily adjust and set the supply flow rate at low cost.

(13) The thirteenth aspect of the present invention, in the ventilating apparatus according to the first, third, seventh, ninth or eleventh aspect, wherein the exhaust flow rate adjusting means 20B is configured so that the exhaust fan 9 rotates. The number of rotations is controlled by controlling the number of rotations.

Therefore, in this configuration, specifically, the rotation speed of the exhaust fan 9 at that time is variably controlled, so that the exhaust flow rate is adjusted more appropriately and accurately.

In this case, as a method of variably controlling the number of revolutions of the exhaust fan 9, for example, a method of changing a drive power supply voltage or a drive power supply frequency of the exhaust fan 9 is adopted.

(14) A fourteenth aspect of the present invention, in the ventilator according to the second aspect of the present invention, wherein the air supply flow rate adjusting means 20A comprises the air supply fan 8 The rotation speed control means controls the rotation speed.

Therefore, in this configuration, specifically, the rotation speed of the air supply fan 8 at that time is variably controlled, so that the air supply flow rate can be adjusted more appropriately and accurately.

In this case, as a method of variably controlling the number of revolutions of the air supply fan 8, for example, a method of changing a drive power supply voltage or a drive power supply frequency of the air supply fan 8 is adopted.

[0055]

As described above, according to the ventilation system of the present invention, the absolute and relative amounts of the air supply and the exhaust can be set or adjusted and controlled as desired. Regardless of the conditions, it is possible to provide a high-performance ventilator having as high an exhaust performance as possible.

[0056]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows a configuration of a ventilation device according to Embodiment 1 of the present invention.

This ventilator 1 is, for example, shown in FIGS.
In the state shown in above, for example, it is provided above the source of polluted air such as odor and smoke in a factory workshop or commercial kitchen, and the surrounding area is from the upper side to the lower side due to outside air (fresh air) introduced from outside. while enveloping the air curtain flow F ₁ of the turning state to, the air curtain flow F ₁ by suction negative pressure to the exhaust direction acting on the air curtain flow F ₁ within the central portion
The odor by the swirling vortex F ₂ occurring upward in the inner,
The odor or smoke from a source of polluted air such as smoke is efficiently sucked and evacuated to the outside without being scattered around.

In the figure, reference numeral 3 designates, for example, a dome-shaped air supply chamber provided above the above-mentioned odor or smoke contaminated air generating source. Inside the air supply chamber 3, a top plate portion is provided. A small-diameter exhaust chamber 4 having the same dome shape is also provided at a predetermined interval from the air supply chamber 3a so as to extend to a position on the lower end side opening surface of the air supply chamber 3. Thereby, the external air sucked through the sub air supply duct 6 and the main air supply duct 60 described later is swirled between the air supply chamber 3 and the exhaust chamber 4 inside the air supply chamber 3 as shown by arrows, An air supply swirl space 16 whose passage diameter is gently enlarged in the centrifugal direction leading to the air outlet 11 is formed, and a swirl flow of a predetermined level is formed in advance with respect to the air flow supplied to the air outlet 11. Has become. Further, a rectifying plate 5 for rectifying the swirling flow formed as described above is provided in the air supply swirling space 16 and located around the upper side of the exhaust chamber 4. The current plate 5 is formed of, for example, a punching plate.

Further, the top plate 3 of the air supply chamber 3
a has a curved air supply port 6a of a sub air supply duct 6 branched from a main air supply duct 60 to introduce outside air in a swirling direction, and a top plate portion 4a of the exhaust chamber 4 described above. At the center, the exhaust ports 7a of the sub exhaust ducts 7 communicating with the main exhaust duct 70 are respectively inserted inside,
The outside air suction end and the inside air discharge end are provided to extend outside through the main air supply duct 60 and the main exhaust duct 70, respectively. And these main air supply ducts 6
0, at the end of each main exhaust duct 70
For example, an air supply fan 8 and an exhaust fan 9 composed of, for example, a multi-blade fan (sirocco fan) are provided, and by driving them, a corresponding air supply operation and exhaust operation are realized.

On the other hand, in the middle of the sub air supply duct 6,
From the upstream side to the downstream side, for example, an air supply flow rate adjusting means 20A as shown in FIG. 4 and an air supply flow rate detecting means 17A as shown in FIG. 3 are provided at predetermined intervals.

First, the supply air flow adjusting means 20A enlarges a part of the sub air supply duct 6 to form an air supply flow adjustment body 41, and the air supply in the air supply flow adjustment body 41 is formed. A variable supply air flow damper 42 composed of a circular butterfly valve is rotatably supported in the flow control space 41a, and the variable supply air flow damper 42 is rotatably operated by an external rotation operation means 4.
4 allows manual rotation operation. Then, the rotation angle is variably set to a predetermined rotation angle (opening / closing angle) capable of obtaining an airflow according to a design target value based on a detection flow rate described later, thereby adjusting and setting a desired supply air flow rate. You can do it.

Next, the supply air flow detecting means 17A expands a part of the sub air supply duct 6 to increase the supply air flow detection body 3A.
1, a disk-shaped orifice plate 32 having a small hole 32a is provided in a supply flow rate detection space in the supply flow rate detection body 31, and the detection space is defined as an upstream high pressure chamber 31a and a downstream low pressure chamber. to a 31b Enashi, allowed communicating a transparent opposite ends each pressure port of the U-shaped liquid column tube 33 therebetween, and the pressure P ₂ of the pressure P ₁ and the low-pressure chamber 31b side of the high-pressure chamber 31a side The liquid column 3 that changes based on the differential pressure ΔP (ΔP = P ₁ −P ₂ )
By reading the change in the height of 3a with the indicator box 34, the supply air flow rate is detected.

In the middle of the sub exhaust duct 7,
From the upstream side to the downstream side, for example, an exhaust flow rate adjusting means 20B as shown in FIG. 5 and an exhaust flow rate detecting means 17B as shown in FIG. 6 are provided at predetermined intervals.

First, the exhaust flow rate adjusting means 20B enlarges a part of the sub exhaust duct 7 to form an exhaust flow rate adjusting body part 41, and the exhaust flow rate adjusting space 41a in the supply air flow adjusting body part 41. A rotatable exhaust flow rate damper 42 having a circular butterfly valve therein is rotatably supported, and the exhaust flow rate variable damper 42 is rotatably operated from outside.
4 allows manual rotation operation. Then, the rotation angle is variably set to a predetermined rotation angle (opening / closing angle) capable of obtaining an air flow according to a design target value based on a detection flow rate described later, so that a desired exhaust flow rate can be adjusted. I can do it.

Next, the exhaust flow rate detecting means 17B enlarges a part of the sub exhaust duct 7 to form an exhaust flow rate detection body section 31, and a small exhaust flow rate detection space in the exhaust flow rate detection body section 31 is provided. A disk-shaped orifice plate 32 having a hole 32a is provided to define the same detection space in an upstream high pressure chamber 31a and a downstream low pressure chamber 31b, and a transparent U
The pressure ports on both ends of the liquid column tube 33 are communicated with each other, and the pressure P ₁ on the high pressure chamber 31a side and the pressure P ₂ on the low pressure chamber 31b side are connected.
By reading the change in the height of the liquid column 33a that changes based on the pressure difference ΔP (ΔP = P ₁ −P ₂ ) with the indicator box 34, the exhaust flow rate is detected.

On the other hand, as shown in FIG. 2, a partition (decorative panel) 10 having a predetermined vertical width is provided on the opening surface between the air supply chamber 3 and the lower end side exhaust chamber 4. An annular air outlet 11 having an air outlet passage extending downward with a predetermined inclination angle in the divergent direction is provided in a portion near the outer periphery of 10. And
The air outlet passage of the air outlet 11 has a helical inclination angle with respect to the circumferential surface thereof, and the air supply direction is effective for the air flow blown out from the air outlet 11. Are provided at predetermined intervals in the circumferential direction, and the swirling flow generating stators 12, 12,... A more effective turning force is applied to the supplied air flow. Further, an air suction grille 14 and an oil mist filter are provided from the lower side to the upper side in the air inlet 13 which is the lower end side opening surface of the dome-shaped large-diameter exhaust passage (exhaust suction space) 4 a in the exhaust chamber 4. Fifteen
Is provided. Further, a divergent angle restricting hood 18 is provided on the outer periphery of the lower end side of the air supply chamber 3 as necessary, so as to restrict unnecessary diffusion of the airflow blown out of the air outlet 11. For the same reason, if necessary, an airflow adhesion prevention guide projecting in the blowing direction is also provided on the outer peripheral side of the air outlet 11.

As described above, in the ventilating apparatus according to this embodiment, the inside of the dome-shaped air supply chamber 3 whose inner diameter is gradually increased from the upper side to the lower side is placed inside the dome-shaped exhaust chamber having the smaller diameter. 4, an air suction port 13 is provided at the lower end side opening surface of the exhaust chamber 4.
In addition, an annular air outlet 11 having an air outlet passage inclined at a predetermined angle so as to gradually increase the radial position from the upper side to the lower side around the outer side of the air inlet 13 at the lower end side opening surface of the air supply chamber 3. And a dome-shaped air supply swirling space 16 whose passage diameter gradually increases from the upper side to the lower side from the air supply port 6a of the sub air supply duct 6 to the air outlet 11 around the exhaust chamber 4. After the air introduced in the swirling direction from outside through the air supply duct 6 in the swirling direction is formed by the air supply swirling space 16 into a swirling flow of a predetermined level, the swirling flow generating stators 12, 12,.
Is generated as a swirling flow as strong as possible through the air outlet 11 provided with the air outlet and blows out at a predetermined blowing angle toward the lower floor surface in the room.

In this case, a rectifying plate 5 for rectifying the flow of the swirling flow flowing in the air supply swirl space 16 is provided in the air supply swirl space 16.

Therefore, when the air supply fan 8 is driven, outdoor fresh air introduced into the dome-shaped air supply chamber 3 from the sub air supply duct 6 in the swirling direction is supplied to the air supply swirling space. After being rectified by the rectifying plate 5 while turning efficiently through the air flow 16, the vortex is supplied to the air outlet 11 as a stable swirling flow having a uniform flow velocity. And
When passing through the air outlet passage of the air outlet 11, by the swirling flow generating stator 12, 12, ..., are even greater vectors of the turning direction is applied, it becomes stronger spiral whirling airflow F ₁ downwards It is blown obliquely toward the surroundings of the source of polluted air such as side odors and smoke.

[0070] As a result, by the spiral swirling blowing airflow F _1, with the odor, the air curtain flow surrounding the odor and smoke from the smoke, such as contaminated air source so as not to scatter around is formed, the the central axis inwardly, swirling intake air flow F ₂ large suction force of the tornado-like rising from the lower side to the upper side by the suction force of the exhaust fan 9 are formed therewith in opposite directions.

Then, the odor wrapped by the air curtain composed of the spiral blowing swirling air flow F ₁ is thereby obtained.
It is possible to reliably exhaust and purify odor and smoke-contaminated air from the source of smoke and other contaminated air.

Further, in that case, in the above configuration, the supply / exhaust flow rate detecting means 17 is provided on both the supply side and the exhaust side.
A, 17B and supply / exhaust flow rate adjusting means 20A, 20B are provided, and the flow rate of one or both of them can be appropriately adjusted. Therefore, the absolute amount of the air supply flow rate and the exhaust flow rate, respectively so as to be able to form the most effective in the above turning regardless constraints whether the supply and exhaust equipment of local outlet stream F ₁ and the orbiting intake flow F ₂ and These mutual relationships can be set to appropriate flow values.

As a result, according to the ventilating apparatus according to this embodiment, it is possible to provide a ventilating apparatus having as high an exhaust performance as possible irrespective of the restrictions on the local air supply / exhaust facilities.

In the ventilating apparatus, the air supply flow rate adjusting means 20A is connected to the air supply fan 8 and the air supply swirl space 16 provided on the outside air suction end side of the sub air supply duct 6 and the main air supply duct 60. And the exhaust flow rate adjusting means 20B is provided between the exhaust fan 9 provided on the discharge end side of the sub exhaust duct 7 and the main exhaust duct 70 and the air suction port 13 side. It is located and provided.

Therefore, with this configuration, it is easy to adjust the supply / exhaust amount, and it is easy to adjust the supply / exhaust flow rate on site.

In the ventilator, the supply / exhaust flow rate adjusting means 20A, 20B are formed by variable dampers 42, 42 capable of varying the opening and closing angles, respectively.

Therefore, in this configuration, the supply / exhaust flow rate can be arbitrarily adjusted and set easily and at low cost by the variable dampers 42, 42.

In the above case, the following various modes are conceivable as a method of adjusting the supply / exhaust flow rate in the ventilator, and the following operational effects can be obtained.

(1) When Exhaust Flow Rate is Adjusted Using Only Exhaust Flow Rate Adjusting Means 20B Regardless of the restrictions on the on-site air supply / exhaust equipment, the air supply flow rate supplied through the air supply duct 6 is Thus, the exhaust flow rate suitable for generating the most effective supply / exhaust swirl vortex can be appropriately adjusted and set.

(2) Adjusting the Exhaust Flow Using the Exhaust Flow Detector 17B and the Exhaust Flow Adjuster 20B
This is appropriately performed according to the exhaust gas detection flow rate detected by the exhaust gas flow rate detecting means 17B.

Therefore, regardless of the restrictions on the on-site air supply / exhaust facilities, the exhaust flow rate suitable for generating the most effective supply / exhaust swirl flow with respect to the air supply rate supplied through the air supply duct 6 Can be appropriately and easily adjusted and set.

(3) When the supply air flow rate is adjusted using only the supply air flow rate adjusting means 20A The supply air flow rate supplied through the air supply duct 6 regardless of the restrictions on the local air supply / exhaust equipment Is adjusted so that the supply flow rate suitable for generating the supply / exhaust swirl vortex most effective for the exhaust flow rate can be appropriately adjusted and set.

(4) When the supply air flow is adjusted using the supply air flow detecting means 17A and the air supply flow adjusting means 20A, the adjustment of the supply air flow with respect to the exhaust air flow in the above (3) is performed by
This is appropriately performed according to the detected air supply flow rate detected by the air supply flow rate detecting means 17A.

Therefore, regardless of the restrictions on the on-site air supply / exhaust equipment, the supply / exhaust swirling flow most effective for generating the most effective supply / exhaust swirl flow is provided for the exhaust flow rate discharged through the exhaust ducts 4 and 7. The air flow can be adjusted appropriately and easily.

(5) When the supply / exhaust flow rate is adjusted using the supply / exhaust flow rate detecting means 17A and the supply / exhaust flow rate adjusting means 20A and the exhaust flow rate detecting means 17B / the exhaust flow rate adjusting means 20B, respectively. The adjustment of the amount and the relative flow between them is appropriately set in accordance with each detected flow value detected by the air supply amount detecting means 17A and the exhaust flow detecting means 17B.

For this reason, the absolute flow rate and the relative flow rate suitable for generating the most effective intake swirling air flow between the supply and exhaust flow rates are appropriately and easily adjusted and set regardless of the restrictions of the on-site supply and exhaust equipment. Will be able to do it.

(6) In the case where any one of the above (1), (2) and (5) methods for adjusting the supply / exhaust flow rate is adopted, the adjustment of the exhaust flow rate by the exhaust flow rate adjusting means 20B is performed more than the supply flow rate. When the exhaust flow rate is adjusted so as to be larger, the suction force in the exhaust direction is large, the installed room tends to have a negative pressure, and the leakage of contaminated air to the outside is prevented.

(7) In the case where any one of the above (3), (4), and (5) air supply / exhaust flow rate adjustment methods is adopted, the adjustment of the air supply flow rate by the air supply flow rate adjusting means 20A is based on the exhaust air flow rate. If the air supply flow rate is adjusted to be larger, the spiral air curtain flow layer blown into the room will be thicker, and the diffusion of contaminated air to the outside will be suppressed. .

(Embodiment 2) FIGS. 7 and 8 show a configuration of a ventilating apparatus according to Embodiment 2 of the present invention.

As shown in FIG. 7, for example, this ventilating apparatus 1 has an air supply flow rate adjusting means 20A in the first embodiment.
And the exhaust flow rate adjusting means 20B are configured as electric dampers whose opening and closing angles are driven and controlled by, for example, stepping motors 50A and 50B, respectively, while the supply air flow rate detecting means 17A and the exhaust flow rate detecting means 17B are each formed of, for example, a hot wire. The air supply flow rate sensor 3 is constituted by an air supply flow rate sensor 34A and an exhaust flow rate sensor 34B.
The stepping motors 50A, 50A of the supply air flow control means 20A and the exhaust flow control means 20B so that the supply flow rate and the exhaust flow rate detected by the 4A and the exhaust flow rate sensor 34B respectively become predetermined design target flow values.
B is electrically driven and controlled by a supply / exhaust control unit 52 composed of a microcomputer so that the supply / exhaust flow rate can be set more appropriately and easily. Other configurations are
This is the same as that of the first embodiment.

The hot wire type air flow rate sensor constituting the supply air flow rate sensor 34A and the exhaust flow rate sensor 34B is configured as follows, for example.

That is, when a platinum hot wire heated by passing an electric current is placed in an air flow, the hot wire resistance changes by cooling according to the flow rate of the air. Therefore, if this is incorporated into one side of the Wheatstone bridge, the air flow rate can be measured by the same principle as that of the resistance measuring instrument.

Recently, a device using a silicon semiconductor in place of a platinum hot wire has been developed, which has a higher mechanical strength and higher sensitivity. Semiconductors are also used.

Next, the air supply / exhaust control unit 5
The adjustment setting control of the supply / exhaust flow rate in this embodiment using the second embodiment will be described with reference to the flowchart of FIG.

[0095] That is, first as an initial setting in step S _1, the supply side, target design air volume value of the exhaust side, respectively (Q
s) ₀ , (Qe) ₀ and the control interval (control cycle) (Δt) ₀ of the control timer are set.

[0096] Then, the program proceeds to step S _2, control interval control timing Δt of the control timer was set above (delta
t) Whether the timing of ₀ has elapsed or not (Δt = (Δ
t) ₀ ? ) Is determined.

As a result, if YES, step S ₃
Then, the detection values (Qs) n and (Qe) n of the supply air flow sensor 34A and the exhaust flow sensor 34B are input. The input detection values (Qs) n, (Q
e) n is the design target airflow value (Qs) ₀ , (Q
whether a e) _0, is determined in step S _4, Y
In the case of ES performs a control completion determination in step S ₅ (supply and exhaust flow rate adjusting process end judgment), finish to the control YES. On the other hand, when NO, the routine returns to step S ₂ on resetting the control interval Delta] t of the present period of the control timer to Delta] t = 0 in step S _8.

[0098] On the other hand, the detection air supply flow rate (Qs) n and detection exhaust flow rate (Qe) n is the design target air volume value of the above-described NO in step S ₄ (Qs) _0, if different from the (Qe) ₀ is
First the routine proceeds to step S _6, their difference (ΔPs) n,
(ΔPe) n, and calculates the flow rate difference (ΔPs) n,
(ΔPe) n is multiplied by a predetermined map constant g, f to calculate the opening / closing variable angle control amounts ΔWs, ΔWe of the electric damper corresponding to the flow rate differences (ΔPs) n, (ΔPe) n, respectively. Then, further proceeds to step S _7, the variable angle? Ws, DerutaWe amount corresponding the stepping motor 5
0A and 50B are drive-controlled to adjust the supply / exhaust flow rate.

Then, thereafter, the flow returns to step S ₃ again to supply the supply air flow (Qs) n and the exhaust air flow (Qe), respectively.
The n newly detected, in step S ₄ followed, the design air volume value they have in each target (Qs) _0, when it is confirmed that it now matches the (Qe) _0, step similarly to the above proceed to S ₅ finish control performs the control completion determination.

As a result, according to the ventilating apparatus of the present embodiment, it is possible to automatically realize the same adjustment of the supply / exhaust flow rate as in the embodiments (1) to (7) of the first embodiment. Thus, a high-performance ventilator having as high an exhaust performance as possible can be provided irrespective of the restrictions on the local air supply and exhaust equipment.

(Embodiment 3) FIG. 9 shows a configuration of a ventilating apparatus according to Embodiment 3 of the present invention.

As shown in FIG. 9, for example, as shown in FIG. 9, in a case where a plurality of ventilation devices 1A to 1D such as a factory ventilation system are provided side by side, the ventilation control system having the configuration of the second embodiment is used. Adopt these multiple ventilation devices 1
Each of A to 1D is a single supply / exhaust control unit 5
3. The centralized control is performed in step 3.

The other structure is the same as that of the second embodiment.

According to such a configuration, each of the plurality of ventilators 1A to 1D can be stably controlled at low cost by a single supply / exhaust control unit 53.

(Other Embodiments) The supply air flow sensor 34A used in the second and third embodiments described above.
The exhaust flow sensor 34B includes, for example, the following (1) to (5) in addition to the hot wire type sensor described above.
It is possible to employ various sensors such as

(1) Movable vane type sensor: Whether the position where the force for pushing open the movable Vane (rotating vane) and the returning force of the return spring are balanced when air passes through the duct. To detect the air flow rate. That is, the rotational position of the movable vane is read by a potentiometer, and the flow rate can be detected in the form of a voltage value.

(2) Turbine type sensor: The rotation speed of the turbine blade is proportional to the flow velocity of air. Therefore, it is detected in the form of the number of revolutions by, for example, a pulse converter.

(3) Karman vortex sensor: A Karman vortex is generated in the duct, and the number of Karman vortices generated in a unit time is detected by ultrasonic modulation. Since the output is a digital signal, there is an advantage that it can be used for drive control of the stepping motors 50A and 50B as it is simply by shaping the waveform.

(4) Ion drift type sensor
When a high voltage is applied, the air in the duct is ionized. Then, when the corona discharge electrode is placed in the flow, ions coming out of the electrode arrive at the pipe wall of the duct, but the position of arrival of the ions shifts to the downstream side as the flow rate increases. Therefore, a conductive film is provided on the inner wall of the duct, and the flow rate is determined by the difference in current flowing between the central electrode and two distant points on the inner wall of the tube.

(5) Ultrasonic sensor: The speed at which sound waves are transmitted is different from leeward to leeward and from leeward to leeward. This difference in sound speed increases as the flow rate increases. This principle is applied, and a piezoelectric element is used for transmitting and receiving ultrasonic waves.

The ventilating apparatus according to the second or third embodiment has the same structure as described above, and further includes the air supply flow rate adjusting means 20A and the exhaust air flow rate adjusting means 20B, for example, the air supply fan 8 and the exhaust fan 9 The rotation speed control means for variably controlling each rotation speed may be configured.

With such a configuration, specifically, the rotation speed of each of the air supply fan 8 and the exhaust fan 9 at that time is variably controlled so that the air supply flow rate and the exhaust flow rate are adjusted more appropriately and accurately. become.

In this case, as a specific method of variably controlling the rotation speeds of the air supply fan 8 and the exhaust fan 9, for example, a method of changing the drive power supply voltage and the drive power supply frequency of each of the air supply fan 8 and the exhaust fan 9 is used. Is adopted.

[Brief description of the drawings]

FIG. 1 is a front view showing the overall structure of a ventilation device according to Embodiment 1 of the present invention.

FIG. 2 is a sectional view showing a configuration of a main part of the apparatus.

FIG. 3 is a partially cutaway perspective view showing a configuration of an air supply flow rate detecting means of the apparatus.

FIG. 4 is a cross-sectional view showing a configuration of an air supply flow rate adjusting means of the apparatus.

FIG. 5 is a partially cutaway perspective view showing a configuration of an exhaust flow rate detecting means of the apparatus.

FIG. 6 is a cross-sectional view illustrating a configuration of an exhaust flow rate adjusting unit of the apparatus.

FIG. 7 is a front view showing the entire structure of a ventilation device according to Embodiment 2 of the present invention.

FIG. 8 is a flowchart showing a supply / exhaust flow rate adjustment control operation of the apparatus.

FIG. 9 is a front view showing the entire structure of a ventilation device according to Embodiment 3 of the present invention.

[Explanation of symbols]

1 is a ventilator, 3 is an air supply chamber, 4 is an exhaust chamber, 6 is a sub air supply duct, 7 is a sub air exhaust duct, 8 is an air supply fan, 9 is an exhaust fan, 11 is an air outlet, and 12 is a swirling flow. The generation stator, 17A, is a supply air flow detecting means, 17A.
B is an exhaust flow rate detecting means, 20A is an air supply flow rate adjusting means, 2
0B is an exhaust flow rate adjusting means, 34A is an air supply flow rate sensor, 3
4B is an exhaust flow sensor.

Claims (14)

[Claims] 1. An air supply swirl space (3), (16) into which external air is introduced via an air supply duct (6), and provided inside the air supply swirl space (3), (16). The exhaust passages (4) and (7) for discharging the internal air and the lower end side opening surfaces of the air supply swirl spaces (3) and (16) are provided with swirl flow generating stators (12) and (12). ), And an air outlet (11) for blowing air in a turning direction through the lower surface of the exhaust passages (4) and (7). )), A ventilation device provided with an air suction port (13) for sucking air in a predetermined local area in a swirling vortex state adjusts the flow rate of exhaust gas exhausted through the exhaust passages (4) and (7). Exhaust flow control means (20
A ventilation device characterized by comprising B). 2. An air supply swirl space (3), (16) into which external air is introduced via an air supply duct (6), and provided inside the air supply swirl space (3), (16). The exhaust passages (4) and (7) for discharging the internal air and the lower end side opening surfaces of the air supply swirl spaces (3) and (16) are provided with swirl flow generating stators (12) and (12). ), And an air outlet (11) for blowing air in a turning direction through the lower surface of the exhaust passages (4) and (7). ), An air suction port (13) for sucking air in a predetermined local area in a swirling vortex state, in the air supply swirl space (3), (16) via the air supply duct (6). A ventilation device characterized by comprising an air supply flow rate adjusting means (20A) for adjusting an air supply flow rate supplied to the inside. 3. An air supply swirl space (3), (16) into which external air is introduced via an air supply duct (6), and provided inside the air supply swirl space (3), (16). The exhaust passages (4) and (7) for discharging the internal air and the lower end side opening surfaces of the air supply swirl spaces (3) and (16) are provided with swirl flow generating stators (12) and (12). ), And an air outlet (11) for blowing air in a turning direction through the lower surface of the exhaust passages (4) and (7). ), An air suction port (13) for sucking air in a predetermined local area in a swirling vortex state, in the air supply swirl space (3), (16) via the air supply duct (6). )) And an exhaust air flow rate adjusting means (20A) for adjusting an air flow rate supplied into the exhaust passages (4) and (7). A ventilation flow rate adjusting means (20B) for adjusting a flow rate of exhaust gas to be ventilated; 4. An exhaust flow rate detecting means (17) for detecting an exhaust flow rate discharged through the exhaust passages (4) and (7).
The ventilation device according to claim 1, wherein (B) and (34B) are provided. 5. An air supply flow detecting means (17A) for detecting an air supply flow supplied through said air supply duct (6).
The ventilation device according to claim 2, wherein (34A) is provided. 6. An air supply flow rate detecting means (17A) for detecting an air supply flow rate supplied through said air supply duct (6).
(34A) and an exhaust flow rate detecting means (17) for detecting an exhaust flow rate discharged through the exhaust passages (4) and (7).
4. The method according to claim 3, wherein B) and (34B) are provided.
The described ventilation system. 7. The ventilator according to claim 1, wherein the exhaust flow rate is adjusted and set so as to be larger than the supply air flow rate. 8. The ventilator according to claim 1, wherein the air supply flow rate is adjusted and set to be larger than the exhaust flow rate. 9. The exhaust flow rate adjusting means (20B) is located between an exhaust fan (9) provided on the exhaust end side of the exhaust passages (4) and (7) and the air suction port (13). The ventilator according to claim 1, 3, 4, 6, or 7, wherein the ventilator is provided. 10. The air supply flow rate adjusting means (20A)
The air supply duct (6) is provided between the air supply fan (8) provided on the outside air suction end side and the air supply swirling space (3), (16) side. The ventilation device according to claim 2, 3, 5, 6, or 8. 11. The exhaust flow rate adjusting means (20B)
4. An electronic device according to claim 1, wherein said opening and closing angle is variable by a variable damper.
The ventilation device according to 4, 6, 7, or 9. 12. The air supply flow rate adjusting means (20A)
4. A variable damper (42) capable of varying an opening angle.
The ventilation device according to 5, 6, 8 or 10. 13. The exhaust flow rate adjusting means (20B) comprises rotation speed control means for controlling the rotation speed of the exhaust fan (9).
The ventilation device according to 1. 14. The air supply flow rate adjusting means (20A) comprises rotation number control means for controlling the rotation number of the air supply fan (8). 13. The ventilation device according to 12.