JP2001355888A - Air supply/exhaust apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air supply/exhaust apparatus in which a more stabilized air curtain flow is ensured by stabilizing a flow velocity distribution of a blow- off air stream from an air blow-off outlet and a blow-off direction. SOLUTION: A tornado type air supply/exhaust apparatus is adapted such that air from a fresh air fan duct 5 is blown out as an air curtain flow to an external periphery of a predetermined local region through air blow-off outlets 3, 53 opened circumferentially on the side of a body, while the air in the predetermined local region surrounded by the air curtain flow is sucked and exhausted to an upper portion in an air suction duct 2 extending to the outside through an air suction inlet 2a provided inside the air blow-off outlets 3, 53. In the apparatus, highly accurate horizontal air stream or air direction control sections 4e, 4f, 14, and 55 are provided at the air blow-off outlets 3, 53 to stabilize the blow-off air stream horizontally.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a method of forming an air curtain flow that covers the outer periphery of a predetermined local area, and exhausting the air inside the air curtain flow by sucking air in the local area. And a supply / exhaust device.

[0002]

2. Description of the Related Art For example, as a ventilation air supply / exhaust device for ventilating a predetermined local area, air is blown in the form of an air curtain so as to cover the outer periphery of the local area, while the local area in the air curtain flow is blown. Has been already proposed by the inventors of the present invention.

[0003] For example, there is an example shown in FIG.

In FIG. 15, reference numeral 4 designates, for example, a substantially conical external air blower chamber (air supply chamber) provided above a predetermined local area such as the above-described grill portion. A dome-shaped intake hood 10 having a relatively shallow depth in the exhaust direction is provided at a predetermined interval so that the lower end 10d of the opening edge 10a of the air collecting opening 10a is open at the lower end 4b side of the outside air blowing chamber 4. It is detachably provided in an offset state protruding downward from the predetermined dimension (described later). And thereby, between the said outside air ventilation chamber 4 and the intake hood 10 inside it,
A ventilation space in which a passage diameter gradually increases in a traveling direction for guiding the outside air introduced through an outside air inlet 5a of an outside air blowing duct (air supply duct) 5 to be described later while effectively turning the outside air. Is formed, and the air outlet 3 is formed.
Is formed in advance into a swirling airflow having a predetermined flow velocity.

[0005] The air outlet 3 to be described later is formed by offsetting the opening surface of the outside air blowing chamber 4 and the opening surface of the intake hood 10 by a predetermined dimension in the vertical direction as described above. The apparatus body including the outside air blowing chamber 4 and the intake hood 10 utilizing a space formed over the entire circumference between the inner peripheral surface of the lower end 4b of the hood and the outer peripheral surface of the shoulder 10c of the intake hood 10. And has a predetermined passage length in the blowing direction and is continuously opened in an annular shape in the entire circumferential direction, and the diameter of the passage center portion gradually increases from the upper side to the lower side. It is formed obliquely at a predetermined expanding angle of inclination.

By the way, in the blowing space in the outside air blowing chamber 4, the flow velocity distribution of the air flow in the swirling direction introduced as described above, which is located above the intake hood 10, is uniform. There is provided an air flow control means having a flow velocity control structure for making the air flow control. As shown in the drawing, the airflow control means moves the airflow space radially outward with respect to the upper first airflow swirling space 4c to which the external air from the external air airflow duct 5 is supplied and the air outlet 3 side described later. A partition plate 41 for partitioning into a widening lower second ventilation air swirling space 4d, and a predetermined size larger than an intake duct 2 and a sleeve 20, which will be described later, which are inserted through a central portion of the partition plate 41 in the up-down direction. It is formed by a cylindrical wall 40 having a diameter. Partition plate 41
Is located on the lower side of the ventilation space and has an outer peripheral end 41
b is attached to the inner peripheral wall surface of the outside air blowing chamber 4 via a ring-shaped corner bracket 42.

A circular opening edge of a sleeve structure for fitting and integrating the cylindrical wall 40 is formed at the center thereof by, for example, a punching method. And fixedly integrated by means such as screwing (or brazing). The cylindrical wall 40 is formed on the outer periphery of the sleeve 20 on the outer periphery of the intake duct 2 described below, and has a sufficient inner diameter so as to maintain a predetermined distance from the sleeve 20. The upper end side opening 40a keeps a predetermined distance from the top plate part 4a of the outside air blowing chamber 4, and the lower end side opening 40b is connected to the main body part 30 of the metal flat plate 30 described later.
b and is supported in a state where a predetermined interval is maintained,
The upper first blown air swirling space 4c and the lower second blown air swirl space 4d communicate with each other, and the swirling airflow on the first blown air swirling space 4c side is reduced in diameter. After the flow velocity distribution is made uniform, an annular rectifying passage 40R that flows to the side of the second blown air swirling space 4d is formed.

Further, the first air in the outside air blowing chamber 4
In the portion of the blown air swirling space 4c, a bent outside air inlet 5a at the front end side of the outside air blow duct 5 is provided to introduce outside air supplied from the outside in an oblique tangential direction (swirl direction).
Are connected in communication. In addition, the intake hood 1
0 is the top plate (top) 4a of the outside air blowing chamber 4
The first and second blast air swirling spaces 4c and 4d and the intake hood 10 are vertically penetrated and introduced, and the lower end side intake port 2a of the intake hood 10 is provided with an opening 10a for collecting air.
An intake duct 2 extending (projecting) in a cylindrical shape so as to be located near the surface is connected in a communicating state. The outside air intake end of the outside air blow duct 5 and the inside air discharge end of the intake duct 2 are each extended outside. At the outside ends of the outside air ventilation duct 5 and the intake duct 2 which are not shown in the drawing, an outside air ventilation fan and a suction fan (intake / exhaust fan) including, for example, a multi-blade fan (sirocco fan) are provided. By these driving, a corresponding outside air blowing action and intake / exhaust action are realized.

The above-mentioned sleeve 20 which can penetrate the intake duct 2 inside is fitted in the inner and outer peripheral portions of the intake duct 2 between the first and second blown air swirling spaces 4c and 4d. The main body portion 30b of the swirling flow generating stators 30a, 30a,... Described later, and the intake hood 10 are integrated with the outside air blowing chamber 4 through the sleeve 20, as described later. I have.

The intake duct 2 is also inserted through the sleeve 20 so that the position of the intake port 2a is set at an appropriate position as described above and fixed.

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

As described above, the air outlet 3 is located between the inner peripheral surface on the lower end 4b side of the outside air blower chamber 4 and the outer peripheral surface of the shoulder 10c of the intake hood 10, and has a predetermined passage length. The opening is formed in an annular shape continuously in the entire circumferential direction, and is formed obliquely at a predetermined inclination angle such that the center diameter gradually increases from the upper side to the lower side. A plurality of swirling flow generating stators 30a, 30a,... Each having a predetermined inclination angle (radial angle) downward in the spiral direction are provided at predetermined intervals in the entire circumferential direction in the air blowing passage portion. It is juxtaposed.

The swirling flow generating stators 30a, 30a.
.. are formed by making cuts in the parabolic direction on the outer peripheral edge of the circular metal flat plate 30 having a fitting opening to the sleeve 20 at the center, and the swirling flow generating stators 30a, 30 to be provided.
are cut out in a band shape corresponding to the shape of a..., and each of the cut out band portions is a donut-shaped main body 3 of the metal plate 30.
By bending downward at a predetermined angle at a predetermined radial position (a position on the radial radiation) on the 0b side, a shape having a predetermined vertical and horizontal dimension, a predetermined radial angle, and extending in the air blowing direction is formed. Have been. Then, the inner peripheral edge of the fitting portion on the central portion side of the metal plate main body 30b is connected to the lower end flange 20a of the sleeve 20 on the outer periphery of the intake duct 2.
The swirling flow generating stators 30a, 30 are fixed by being fitted and locked from above and fixed by screws (not shown) after being positioned through, for example, a circular long hole (not shown).
The parts a ... are appropriately set in the air outlet passage of the air outlet 3.

The upper surface of the dome-shaped intake hood 10 is provided on the lower surface side of the lower end side flange 20a of the sleeve 20 which supports the metal plate main body 30b of the swirl flow generating stators 30a. The plate portion 10b is integrally attached by a detachable attachment means such as a slide engagement method so that the plate portion 10b can be easily attached or detached from below.

That is, the intake hood 10 is mounted on the lower surface of the lower end flange 20a of the sleeve 20, for example.
Are provided, while the top plate 1 of the intake hood 10 is provided.
.. Are arbitrarily fitted on the side 0b, and are slid in the circumferential direction by a predetermined rotation angle from the fitted position, so that the side edges enter the gap and are positioned. It is realized by providing a rectangular engagement hole (not shown) that engages in an overlapping manner in the state, and is fixed at this engagement position by a screw (not shown).

The outer peripheral surface of the lower end 10d of the cylindrical opening edge of the intake hood 10 has a wind direction control edge for guiding the air flow from the air outlet 3 as horizontally as possible. 14 is provided opposite the air outlet 3.

The wind direction control edge 14 is provided at the lower end of the dome body of the intake hood 10 (the upper end of the opening edge lower end 10d) and extends in the horizontal direction.

Therefore, in this configuration, after the airflow blown out from the air outlet 3 exits the air outlet 3, the airflow is guided outward on the upper surface of the wind direction control edge 14 in the horizontal direction. .

[0019]

By the way, in the above-mentioned air supply / exhaust device, if the direction of air blow from the air outlet 3 is made downward, the suction area becomes small and oil smoke leakage increases. On the other hand, when the blowing direction is outward,
The suction area expands, but a draft can be felt.

Therefore, if the air blowing direction is horizontal, the force against the side wind from an air conditioner or the like increases,
The required ventilation volume under the same crosswind environment can be reduced. In addition, the cost of the air conditioning equipment and the running cost can be reduced. Also, the vertical velocity component is small,
The radial component attenuates as the square increases as the distance increases, so that the sense of draft also decreases.

The wind direction control edge 14 on the intake hood 10 side
Is provided for that purpose, and guides the air blown out from the air outlet 3 in the horizontal direction as much as possible.

However, in the structure of the above-mentioned prior art, as shown by the phantom line in FIG. 16 or 17, for example, whether the main flow of the blown air flow is deviated to the intake hood 10 side or the outside air blow chamber 4 side As a result, the blowing direction (θ in FIG. 17) changes, and the exhaust performance becomes unstable.

The present invention has been made in order to solve such a problem, and stabilizes the blowing direction of the blown airflow from the air outlet in the horizontal direction as much as possible. It is an object of the present invention to provide an air supply / exhaust device capable of forming a stable air curtain flow.

[0024]

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

(1) The air supply / exhaust device according to the present invention has the intake hoods 10, 60 in which the opening diameter gradually decreases from the lower side to the upper side, which collects and exhausts air in a predetermined lower local area. And the intake hood 10,
Blowing chambers 4, 50 whose opening diameters gradually decrease from the lower side to the upper side, which form an air supply space and air outlets 3, 53 between the intake hoods 10, 60 and the outer peripheral surface of the intake hoods 10, 60. And wind direction control edges 14, 55 provided on the outer periphery of lower ends of the intake hoods 10, 60 and guiding air blown obliquely downward from the air outlets 3, 53 in a horizontal direction. In the exhaust device, the lower ends of the air outlets 3 and 53 of the blower chambers 4 and 50 are extended downward, so that the air outlets 3 and 53 are extended.
Is formed to be narrow toward the outer peripheral surface side of the intake hoods 10, 60.

According to such a configuration, the air outlet 3,
53 itself is displaced toward the outer peripheral surface side of the intake hoods 10 and 60 and becomes narrower, and the lower wind direction control edges 14 and 55 are formed.
Of the intake hoods 10 and 60 on the upstream side of the air outlets 3 and 55, and also on the downstream side of the air outlets 3 and 53. The flow is converged on the outer peripheral surface side and becomes a stable flow having a uniform flow velocity distribution.

Then, since they collide with the upper surfaces of the wind direction control edges 14, 55 at a stable and substantially constant blowing angle and are changed in the horizontal direction, the air can always be blown out stably in the horizontal direction. become.

As a result, the air in the predetermined local area can be efficiently suctioned and collected to the intake port side without being diffused to the surroundings, and can be exhausted to the outside, thereby improving the exhaust performance.

(2) The air supply / exhaust device according to the present invention provides the intake hoods (10, 60) whose opening diameter gradually decreases from the lower side to the upper side, which collects and exhausts air in a predetermined lower local area. And the intake hood 10,
A ventilation chamber 4 having an opening diameter gradually decreasing from a lower side to an upper side which forms an air supply space and air outlets 3 and 53 between the intake hoods 10 and 60 and the outer peripheral surface of the air intake hoods 10 and 60 which are located on the outer periphery of the upper part 60. 50, and wind direction control edges 14, 55 which are provided on the outer periphery of the lower ends of the intake hoods 10, 60 and guide the air blown obliquely downward from the air outlets 3, 53 in the horizontal direction. In the air supply and exhaust system,
The air outlets 3 and 53 of the blowing chambers 4 and 50
By providing an airflow control edge 4f extending in the direction of the intake hoods 10 and 60 inside the lower end, the air outlets 3 and 53 are narrowed toward the intake hoods 10 and 60. .

According to such a configuration, the air outlet 3,
Since 53 itself is deviated and narrowed toward the outer peripheral surface side of the intake hoods 10 and 60, the blow-off airflow flowing toward the blower chambers 4 and 50 is also upstream of the air outlets 3 and 53. On the downstream side of the outlets 3 and 53, the intake hood 1
The flow is converged on the outer peripheral surface side of 0, 60 and becomes a stable flow having a uniform flow velocity distribution.

Then, since it collides with the upper surfaces of the wind direction control edges 14, 55 at a stable and substantially constant blowing angle and the wind direction is changed in the horizontal direction, it is possible to always stably blow out in the horizontal direction.

As a result, the air in the predetermined local area can be efficiently sucked and collected toward the intake port without being diffused to the surroundings, and can be exhausted to the outside, thereby improving the exhaust performance.

(3) The air supply / exhaust device according to the present invention has the intake hoods (10, 60) whose opening diameter gradually decreases from the lower side to the upper side, which collects and exhausts air in a predetermined lower local area. And the intake hood 10,
Blowing chambers 4, 50 whose opening diameters gradually decrease from the lower side to the upper side, which form an air supply space and air outlets 3, 53 between the intake hoods 10, 60 and the outer peripheral surface of the intake hoods 10, 60. And wind direction control edges 14, 55 provided on the outer periphery of lower ends of the intake hoods 10, 60 and guiding air blown obliquely downward from the air outlets 3, 53 in a horizontal direction. In the exhaust device, the wind direction control edges 14, 55 are connected to the intake hoods 10, 60.
By being provided above the lower end of the air outlet, the space between the air outlets 3, 53 and the wind direction control edges 14, 55 is narrowed.

According to such a configuration, the air outlet 3,
Since 53 itself approaches the upper surfaces of the lower wind direction control edges 14 and 55, the blown air flowing toward the blower chambers 4 and 50 on the upstream side of the air outlets 3 and 53 is also reduced to the air outlet 3. , 53 on the downstream side, the air flow collides with the upper surface of the wind direction control edges 14 and 55 at a stable and substantially constant blowing angle, and the wind direction is changed in the horizontal direction.

As a result, the air in the predetermined local area can be efficiently suctioned and collected to the intake port side without being diffused to the surroundings and can be exhausted to the outside, so that the exhaust performance is improved.

(4) The air supply / exhaust device according to the present invention provides the intake hoods (10, 60) whose opening diameter gradually decreases from the lower side to the upper side, which collects and exhausts air in a predetermined lower local area. And the intake hood 10,
Blowing chambers 4, 50 whose opening diameters gradually decrease from the lower side to the upper side, which form an air supply space and air outlets 3, 53 between the intake hoods 10, 60 and the outer peripheral surface of the intake hoods 10, 60. And wind direction control edges 14, 55 provided on the outer periphery of lower ends of the intake hoods 10, 60 and guiding air blown obliquely downward from the air outlets 3, 53 in a horizontal direction. In the exhaust device, the lower ends of the air outlets 3 and 53 of the blower chambers 4 and 50 are extended downward, so that the air outlets 3 and 53 are extended.
The air outlets 3 and 53 are formed narrower toward the intake hoods 10 and 60 and the wind direction control edges 14 and 55 are provided above the lower ends of the intake hoods 10 and 60. And the wind direction control edge 14,
55 is formed narrow.

According to such a configuration, the air outlet 3,
53 itself deviates toward the outer peripheral surface side of the intake hoods 10 and 60 and becomes narrower, and furthermore, the lower wind direction control edge 1
The air outlets 3,5
On the upstream side of 3, the blown airflow flowing toward the blowing chambers 4, 50 is also converged on the outer peripheral surface side of the intake hoods 10, 60 on the downstream side of the air outlets 3, 53, thereby stabilizing a uniform flow velocity distribution. It will be a flow that has flowed.

Then, the air flow collides with the upper surfaces of the wind direction control edges 14, 55 at a stable and substantially constant blowing angle and is changed in the horizontal direction, so that the air can always be blown out stably in the horizontal direction.

As a result, the air in the predetermined local area can be efficiently suctioned and collected to the intake port side without being diffused to the surroundings and can be exhausted to the outside, thereby improving the exhaust performance.

(5) The invention of claim 5 The supply / exhaust device of the present invention is the above-mentioned claim 1, 2, 3, or 4.
In the described invention, the air outlets 3, 53 are provided with swirling flow generating means 30a, 30a,... So that the air to be blown is spirally swirled. .

As described above, the air flow blown horizontally from the air outlet 3 is converted into swirling flow generating means 30a, 30a,.
・ By forming a spiral swirling airflow by
The airflow distribution density of the air curtain flow covering the lower predetermined region is stable, resistant to disturbance, and has high sealing performance.

Further, since the suction airflow has a tornado shape, the rising temperature of the rising airflow is improved, and the recovery from the turbulence of the blowout airflow caused by the temporary or instantaneous crosswind is accelerated.

(6) The air supply / exhaust device according to the present invention, in the air supply / exhaust device according to the first, second, third, fourth, or fifth aspect, wherein the wind direction control edges 14, 55 are provided from the upper surface to the lower surface Slits 14d, 14 penetrating to the side
, 55a, 55a,... are provided, and air is blown downward.

As described above, when air can be blown not only in the horizontal direction but also downward through the slits 14d, 14d,..., 55a, 55a,. The downward blowing airflow increases the rising speed of the suction rising airflow from below to above, and the recovery from the turbulence of the blowing airflow due to the temporary or instantaneous crosswind blowing increases.

As a result, the air conditioning load can be reduced.

[0046]

As described above, according to the air supply / exhaust device of the present invention, it is possible to blow out an air curtain-shaped blow-off airflow covering a predetermined local area uniformly as nearly as possible. Thus, it is possible to efficiently realize the exhaust operation of the air in the predetermined local area without causing the user to feel the draft in the local area. In addition, it becomes strong against the influence of disturbance such as a cross wind caused by an air conditioner or the like in the ceiling direction.

Therefore, even when this device is applied to, for example, a local ventilation device, the ventilation in the predetermined local region can be performed sufficiently efficiently by a reliable air curtain flow that does not make a draft with a stable flow velocity distribution. become able to.

[0048]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (Embodiment 1) FIGS.
1 shows a configuration of a tornado-type local ventilation device configured by employing a supply / exhaust device according to Embodiment 1 of the present invention.

The tornado type local ventilation device is provided, for example, above a predetermined local area such as a grill portion on a customer table in a barbecue store, and the outside periphery of the grill portion is viewed from above by outside air introduced from outside. while covering the spiral whirling airflow F ₁ to the lower side of the air curtain, the negative suction pressure in the intake direction acting on the air curtain of spiral swirling current F ₁ within the central portion of the air curtain allowed form tornado-like air intake swirling current F ₂ occurring upward in spiral swirling the airflow F _1, by該竜winding shaped upwardly whirling air current F ₂ efficiently smoke and odor generated in the predetermined local region It is designed so that it can be sucked and exhausted outside the room.

In FIG. 1 to FIG. 3, reference numeral 4 designates, for example, a substantially conical outside air blowing chamber (air supply chamber) provided above a predetermined local area such as the grill section. A dome-shaped intake hood 1 having a relatively deep dome shape with an opening diameter gradually decreasing from a lower side to an upper side at a predetermined interval is provided at an inner lower side.
Numeral 0 is provided detachably in an offset state in which the straight opening edge lower end 10d of the air collecting opening 10a projects downward from the opening surface on the lower end 4b side of the outside air blowing chamber 4 by a predetermined dimension (described later). Thus, while effectively turning the outside air introduced between the outside air blowing chamber 4 and the intake hood 10 inside the outside air blowing chamber 4 through an outside air inlet 5a of an outside air blowing duct (air supply duct) 5 described later. A ventilation space (supply space) having a passage diameter gradually increasing in a traveling direction for guiding the air to the air outlet 3 described later is formed. To be formed.

The air outlet 3 to be described later is arranged such that the opening surface of the outside air blowing chamber 4 and the opening surface of the intake hood 10 are vertically offset by a predetermined dimension as described above. The apparatus body including the outside air blowing chamber 4 and the intake hood 10 utilizing a space formed over the entire circumference between the inner peripheral surface of the lower end 4b of the hood and the outer peripheral surface of the shoulder 10c of the intake hood 10. , And has a predetermined passage length in the blowing direction and is continuously opened in an annular shape in the entire circumferential direction.The diameter of the passage center portion gradually increases from the upper side to the lower side. It is formed obliquely at a predetermined expanding angle of inclination.

By the way, in the blowing space in the outside air blowing chamber 4, the flow velocity distribution of the air flow in the swirling direction introduced as described above, which is located above the intake hood 10, is uniform. There is provided an air flow control means having a flow velocity control structure for making the air flow control. As shown in FIG. 1, the airflow control means includes an upper first blown air swirling space 4c to which the outside air is supplied from the outside air blow duct 5 as shown in FIG.
A partition plate 41 for partitioning into a lower second blown air swirling space 4d which spreads radially outwardly on the side of the air outlet 3 described later;
The partition plate 41 is formed by an intake duct 2 and a cylindrical wall 40 having a predetermined diameter and a diameter larger than that of the sleeve 20, which are inserted and inserted through the center of the partition plate 41 in the vertical direction. Partition plate 41
Is located on the lower side of the ventilation space and has an outer peripheral end 41
b is attached to the inner peripheral wall surface of the outside air blowing chamber 4 via a ring-shaped corner bracket 42.

At the center, a circular opening edge of a sleeve structure for fitting and integrating the cylindrical wall 40 is formed by, for example, a punching method. The above-mentioned cylindrical wall 40 is fitted into the opening, and is fixed and integrated by means such as screws (or brazing). The cylindrical wall 40 is formed on the outer periphery of the sleeve 20 on the outer periphery of the intake duct 2 described below, and has a sufficient inner diameter so as to maintain a predetermined distance from the sleeve 20. The upper end side opening 40a keeps a predetermined distance between the top plate part 4a of the outside air blowing chamber 4 and the lower end side opening 40b has a predetermined distance between the main body part 30b of the metal plate 30 described later. And the upper first blown air swirling space 4c and the lower second blown air swirl space 4d communicate with each other,
After reducing the path diameter of the swirling airflow on the side of the first blowing air swirling space 4c to make the flow velocity distribution uniform,
Annular rectifying passage 4 flowing to the side of second blowing air swirling space 4d
OR is formed.

Further, the first air in the outside air blowing chamber 4
In the portion of the blown air swirling space 4c, a bent outside air inlet 5a at the front end side of the outside air blow duct 5 is provided to introduce outside air supplied from the outside in an oblique tangential direction (swirl direction).
Are connected in communication. In addition, the intake hood 1
0 is the top plate (top) 4a of the outside air blowing chamber 4
The first and second blast air swirling spaces 4c and 4d and the intake hood 10 are vertically penetrated and introduced, and the lower end side intake port 2a of the intake hood 10 is provided with an opening 10a for collecting air.
An intake duct (exhaust duct) 2 extending (projecting) in a cylindrical shape so as to be located near the surface is connected in a communicating state.
The outside air intake end of the outside air blow duct 5 and the inside air discharge end of the intake duct 2 are each extended outside.
At the outside ends of the outside air ventilation duct 5 and the intake duct 2 which are not shown in the drawing, an outside air ventilation fan and a suction fan (intake / exhaust fan) including, for example, a multi-blade fan (sirocco fan) are provided. By these driving, a corresponding outside air blowing action and intake / exhaust action are realized.

The above-described sleeve 20 that can penetrate the intake duct 2 inside is fitted in the inner and outer peripheral portions of the intake duct 2 between the first and second blast air swirling spaces 4c and 4d. The main body portion 30b of the swirling flow generating stators 30a, 30a,... Described later, and the intake hood 10 are integrated with the outside air blowing chamber 4 through the sleeve 20, as described later. I have.

The intake duct 2 is also inserted through the sleeve 20 so that the position of the intake port 2a is set to an appropriate position as described above and fixed.

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

As described above, the air outlet 3 is located between the inner peripheral surface on the lower end 4b side of the outside air blowing chamber 4 and the outer peripheral surface of the shoulder 10c of the intake hood 10 and has a predetermined passage length. The opening is formed in an annular shape continuously in the entire circumferential direction, and is formed obliquely at a predetermined inclination angle such that the center diameter gradually increases from the upper side to the lower side. A plurality of swirling flow generating stators (swirl flow generating means) 30a, 30a,... Each having a predetermined inclination angle (radial angle) downward in the spiral direction are provided in the air blowing passage portion.
Are arranged side by side at predetermined intervals in the entire circumferential direction.

The swirling flow generating stators 30a, 30a.
For example, as shown in FIG. 2, a circular-parallel-shaped cut is made in the outer peripheral edge of a circular metal flat plate 30 having a fitting opening to the sleeve 20 at the center, and a swirling flow generating stator 30a, The cutouts are cut out in a band shape corresponding to the shape of 30a.
The dough-shaped body portion 30b is bent downward at a predetermined radial position (radial position in the radial direction) at a predetermined angle so that the air blowing direction has a predetermined vertical and horizontal dimension and a predetermined radial angle. It is formed in a shape extending in the direction. Then, the inner peripheral edge of the fitting portion on the center portion side of the metal plate main body 30b is connected to the sleeve 2 on the outer periphery of the intake duct 2.
, And is fixed by screws 11b, 11b... After being positioned via the circular long holes 11a, 11a. The flow generating stators 30a, 30a,... Are appropriately installed in the air outlet passage of the air outlet 3.

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

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

A wind direction control edge 14 is provided on the outer peripheral surface of the opening edge of the intake hood 10 to guide the airflow from the air outlet 3 as horizontally as possible. .

As shown in detail in FIG. 3, for example, the wind direction control edge 14 forms a control surface extending horizontally from the lower edge of the dome main body side forming the dome surface of the intake hood 10. An edge 14a and a locking edge 14b which is bent in a U-shape inward at the outer end to lock an upper horizontal edge 14c of a cylindrical opening edge lower end 10d of the intake hood 10. It is configured.

Therefore, in this configuration, the airflow blown out from the air outlet 3 is guided outward in the horizontal direction on the upper surface of the wind direction control edge 14, so that the wind speed of the airflow is not reduced. The blowing direction can be stabilized in the horizontal direction, and a swirling airflow having a uniform airflow distribution and no turbulence can be generated.

Further, in this embodiment, as shown in the figure, the lower edge 4e of the lower end 4b of the outside air blower chamber 4 on the side of the air outlet 3 facing the airflow direction control edge 14 is vertically extended by a predetermined length. The air outlet 3 is connected to the intake hood 10 by extending
The air outlet 3 is formed to be narrower toward the outer peripheral surface side of the dome main body, so that the airflow blown out from the air outlet 3 is converged on the dome surface side of the intake hood 10 and the opening surface of the air outlet 3 is made to have a wind direction control edge. 14 so as to approach the upper surface.

Therefore, the blown airflow blown out from the air outlet 3 becomes an integrated flow converging on the dome side of the intake hood 10, and then immediately flows into the wind direction control edge 1.
4 allows the air to be blown out more effectively in the horizontal direction, and whether the airflow distribution at the inlet of the air outlet 3 fluctuates toward the outside air blow chamber 4 or the intake hood 10, Without being affected by this, it is possible to constantly and stably blow out in a horizontal direction with a uniform airflow distribution state.

In the above case, the air collecting opening 10a of the intake hood 10 has the opening edge lower end 10d.
As shown in detail in FIG.
4 and is formed in a tubular shape by extending straight below the predetermined dimension.

As described above, when the wind direction control edge 14 is provided on the outer peripheral side of the intake hood 10, the wind direction control edge 14 is located radially outward from the opening surface of the air collection opening 10 a of the intake hood 10. Hood 1
Velocity component in the radially outward side of one of the rising swirling outer peripheral side of the air flow F ₂ which is gas collector into the 0 becomes stronger, the intake hood 1
0, it tends to leak outside, and the collection efficiency in the exhaust direction decreases.

However, as described above, the intake hood 10
If the lower end 10d of the opening edge of the air collection opening 10a is formed in a cylindrical shape extending straight below the edge 14 for airflow control to a predetermined dimension, the upward swirling airflow in the exhaust direction will be described. those of the outer peripheral side of the F _2, for example, as shown in FIG. 3, at a stage before the velocity component in the radially outward becomes strong,
The suction can be reliably performed toward the air collection opening 10a of the intake hood 10, and the collection efficiency in the exhaust direction can be improved.

Therefore, in the above configuration, if the outside air blower fan on the side of the outside air blower duct 5 and the intake fan on the side of the intake duct 2 are driven, for example, first, the outside air inlet 5a Is blown tangentially into the first blown air swirling space 4c by the blowing pressure from the outside air blowing fan. Then, the air that has flown into the first blast air swirling space 4c with a predetermined level of dynamic pressure in the swirling direction is once blocked by the partition plate 41, and Is evenly distributed throughout.

Then, after that, the gas uniformly flows from the entire circumferential direction of the upper end side opening 40a into the annular rectifying passage 40R having a predetermined length in the vertical direction, in which the shape is stable and the passage diameter is reduced. Thus, the flow is narrowed at a stage where it flows through the annular rectification passage 40R for a predetermined time, and the flow velocity is further uniformed.

The air flow having the further uniformed flow velocity flows from the lower opening 40b to the air outlet 3 as described above.
The air is uniformly blown while being swirled outward in the radial direction of the second blown air swirling space 4d expanding in the direction, and the inner circumferential surface on the lower end 4b side of the outside air blower chamber 4 and the outer circumferential surface of the shoulder 10c of the intake hood 10 are formed. Is supplied to the air outlet 3 continuously provided in the circumferential direction between the air outlet 3 and the air outlet 3. When passing through the air outlet passage of the air outlet 3, the swirling flow generating stators 30a, 30a,... Give a larger vector in the swirling direction, and the airflow velocity is more uniform in the entire circumferential direction. after becoming stable and spiral swirling current F _1, while being converged on the domed surface side by the action of the lower edge 4e which is further extended downward, and is blown out toward the wind direction control edge 14. Then, guided by the wind direction control edge 14, covers the outer periphery of the cooking device in the lower predetermined local region,
It is blown out in a horizontal direction so as to effectively block external disturbance wind such as crosswind.

[0073] As a result, the blow-out whirling air current F ₁ strong helical stable horizontally disturbance wind, reliable air curtain flow surrounding the smoke and odor so as not to diffuse around exiting the predetermined local region Is formed on the inner side in the direction of the central axis toward the direction of the intake port 2a, which extends in a cylindrical shape to the vicinity of the surface of the intake opening 10a of the intake hood 10 of the intake hood 10 in the opposite direction. swirling air flow F ₂ stably a large suction force of the tornado-like rising upward from below by the suction force of the suction fan is formed.

Then, a reliable exhaust of contaminated air such as smoke and odor from a predetermined local area wrapped by the air curtain flow composed of the spiral blow-off swirling air flow F ₁ is achieved.
Cleaning becomes possible.

When the suction airflow has a tornado shape as described above, the rising temperature of the rising airflow is improved, and the rise of the blowout airflow from the turbulence of the blown airflow caused by the temporary or instantaneous crosswind is accelerated.

(Embodiment 2) Next, FIGS.
Shows a configuration of a tornado-type local ventilation device configured by employing the air supply / exhaust device according to Embodiment 2 of the present invention.

In this embodiment, in the configuration of the conventional tornado-type local ventilation device described above, the wind direction control edge 14 of the intake hood 10 is set so that the air blowing direction can be set as horizontal as possible. It is provided on the dome surface and is close to the opening surface of the air outlet 3.

4 and 5, reference numeral 4 designates, for example, a substantially conical external air blowing chamber (air supply chamber) provided above a predetermined local area such as a grill section on the customer table of the above-mentioned yakiniku restaurant. Yes, this outside air blowing chamber 4
A dome-shaped air-intake hood 10 having a relatively deep dome shape in the exhaust direction is provided at a predetermined interval at a predetermined distance from the outside air blowing chamber. 4 is provided detachably in an offset state protruding downward from the opening surface on the lower end 4b side by a predetermined dimension (described later). And thereby, between the said outside air ventilation chamber 4 and the intake hood 10 inside it,
A ventilation space in which a passage diameter gradually increases in a traveling direction for guiding the outside air introduced through an outside air inlet 5a of an outside air blowing duct (air supply duct) 5 to be described later while effectively turning the outside air. A (supply space) is formed, and an airflow to be supplied to the air outlet 3 is formed into a swirling airflow having a predetermined flow velocity in advance.

Further, the air outlet 3 described later is provided with the opening surface of the outside air blowing chamber 4 and the opening surface of the intake hood 10 offset by a predetermined dimension in the vertical direction as described above. The apparatus body including the outside air blowing chamber 4 and the intake hood 10 utilizing a space formed over the entire circumference between the inner peripheral surface of the lower end 4b of the hood and the outer peripheral surface of the shoulder 10c of the intake hood 10. And has a predetermined passage length in the blowing direction and is continuously opened in an annular shape in the entire circumferential direction, and the diameter of the passage center portion gradually increases from the upper side to the lower side. It is formed obliquely at a predetermined expanding angle of inclination.

By the way, in the blowing space in the outside air blowing chamber 4, the flow velocity distribution of the air flow in the swirling direction introduced as described above, which is located above the intake hood 10, is uniform. There is provided an air flow control means having a flow velocity control structure for making the air flow control. As shown in FIG. 4, the airflow control means includes an upper first blown air swirling space 4 c to which the outside air is supplied from the outside air blower duct 5.
A partition plate 41 for partitioning into a lower second blown air swirling space 4d which spreads radially outwardly on the side of the air outlet 3 described later;
The partition plate 41 is formed by an intake duct 2 and a cylindrical wall 40 having a predetermined diameter and a diameter larger than that of the sleeve 20, which are inserted and inserted through the center of the partition plate 41 in the vertical direction. Partition plate 41
Is located on the lower side of the ventilation space and has an outer peripheral end 41
b is attached to the inner peripheral wall surface of the outside air blowing chamber 4 via a ring-shaped corner bracket 42.

At the center thereof, a circular opening edge of a sleeve structure for fitting and integrating the cylindrical wall 40 is formed by, for example, a punching method or the like. The above-mentioned cylindrical wall 40 is fitted into the opening, and is fixed and integrated by means such as screws (or brazing). The cylindrical wall 40 is formed on the outer periphery of the sleeve 20 on the outer periphery of the intake duct 2 described below, and has a sufficient inner diameter so as to maintain a predetermined distance from the sleeve 20. The upper end side opening 40a keeps a predetermined distance between the top plate part 4a of the outside air blowing chamber 4 and the lower end side opening 40b has a predetermined distance between the main body part 30b of the metal plate 30 described later. And the upper first blown air swirling space 4c and the lower second blown air swirl space 4d communicate with each other,
After reducing the path diameter of the swirling airflow on the side of the first blowing air swirling space 4c to make the flow velocity distribution uniform,
Annular rectifying passage 4 flowing to the side of second blowing air swirling space 4d
OR is formed.

Further, the first air blow chamber 4
In the portion of the blown air swirling space 4c, a bent outside air inlet 5a at the front end side of the outside air blow duct 5 is provided to introduce outside air supplied from the outside in an oblique tangential direction (swirl direction).
Are connected in communication. In addition, the intake hood 1
0 is the top plate (top) 4a of the outside air blowing chamber 4
The first and second blast air swirling spaces 4c and 4d and the intake hood 10 are vertically penetrated and introduced, and the lower end side intake port 2a of the intake hood 10 is provided with an opening 10a for collecting air.
An intake duct (exhaust duct) 2 extending (projecting) in a cylindrical shape so as to be located near the surface is connected in a communicating state.
The outside air intake end of the outside air blow duct 5 and the inside air discharge end of the intake duct 2 are each extended outside.
At the outside ends of the outside air ventilation duct 5 and the intake duct 2 which are not shown in the drawing, an outside air ventilation fan and a suction fan (intake / exhaust fan) including, for example, a multi-blade fan (sirocco fan) are provided. By these driving, a corresponding outside air blowing action and intake / exhaust action are realized.

The above-mentioned sleeve 20 which can penetrate the intake duct 2 inside is fitted on the inner and outer peripheral portions of the intake duct 2 between the first and second blast air swirling spaces 4c and 4d. The main body portion 30b of the swirling flow generating stators 30a, 30a,... Described later, and the intake hood 10 are integrated with the outside air blowing chamber 4 through the sleeve 20, as described later. I have.

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

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

As described above, the air outlet 3 is located between the inner peripheral surface on the lower end 4b side of the outside air blowing chamber 4 and the outer peripheral surface of the shoulder 10c of the intake hood 10, and has a predetermined passage length. The opening is formed in an annular shape continuously in the entire circumferential direction, and is formed obliquely at a predetermined inclination angle such that the center diameter gradually increases from the upper side to the lower side. A plurality of swirling flow generating stators 30a, 30a,... Each having a predetermined inclination angle (radial angle) downward in the spiral direction are provided at predetermined intervals in the entire circumferential direction in the air blowing passage portion. It is juxtaposed.

The swirling flow generating stators 30a, 30a.
.. As shown in, for example, FIG. 2 described above, a swirl flow generating stator to be provided by making a cut in a parabolic direction at the outer peripheral edge of a circular metal flat plate 30 having a fitting opening to the sleeve 20 at the center. Each of the cut-out strips is positioned at a predetermined radial position on the donut-shaped main body 30b side of the metal plate 30 (in the radial direction). At a position (b), a predetermined angle is bent downward to form a shape having a predetermined vertical and horizontal dimension, a predetermined radial angle, and extending in the air blowing direction. Then, the inner peripheral edge of the central side fitting opening of the metal plate main body 30b is fitted and locked from above on the lower end side flange 20a of the sleeve 20 on the outer circumference of the intake duct 2, and the circular elongated hole 11a, 11a, and are fixed by screws 11b, 11b,... So that the swirling flow generating stators 30a, 30a,. It is to be installed.

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

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

In the case of this embodiment, the outer surface (dome surface) of the dome body above the upper end of the lower end 10d of the cylindrical opening edge of the intake hood 10 is provided with the air. A wind direction control edge 14 is provided near the air outlet 3 for guiding the airflow from the outlet 3 as horizontally as possible.

As shown in detail in FIG. 5, for example, the wind direction control edge 14 extends from the lower edge of the dome body of the intake hood 10 to the control surface forming edge 1 extending horizontally.
4a and a locking edge 14b which is bent in an inward U-shape on the outer end and locks the upper horizontal edge 14c of the opening lower edge 10d.

Therefore, in this configuration, the blown airflow blown out of the air outlet 3 collides with the wind direction control edge 14 immediately after exiting the air outlet 3, and is quickly guided outward in the horizontal direction on the upper surface thereof. This makes it possible to stabilize the blowing direction in the horizontal direction without reducing the wind speed of the blowing airflow, and to generate a horizontal swirling airflow having a uniform flow velocity distribution and no turbulence.

As a result, the stability against crosswinds is improved.

In this case, the air collecting opening 10a of the intake hood 10 is formed with an opening edge lower end 10d.
Are formed to extend straight in a tubular shape below the edge part 14 for airflow control by a predetermined dimension.

As described above, when the wind direction control edge 14 is provided on the outer peripheral side of the intake hood 10, the wind direction control edge 14 is located radially outward from the opening surface of the air collection opening 10 a of the intake hood 10. Hood 1
Velocity component in the radially outward side of one of the rising swirling outer peripheral side of the air flow F ₂ which is gas collector into the 0 becomes stronger, the intake hood 1
0, it tends to leak outside, and the collection efficiency in the exhaust direction decreases.

However, as described above, the intake hood 10
Of the opening edge lower end 10d of the condensing air opening 10a is predetermined dimension extending downwardly from an edge 14 for the air flow control, the ones on the outer peripheral side of the upwardly whirling air current F ₂ to the exhaust direction For example, as shown in FIG. 5, at a stage before the velocity component in the radially outward direction becomes strong, the air can be reliably sucked into the air collection opening 10 a side of the intake hood 10,
The collection efficiency in the exhaust direction can be improved.

Therefore, in the above configuration, if the outside air blower fan on the side of the outside air blower duct 5 and the intake fan on the side of the intake duct 2 are driven, for example, first, the outside air inlet 5a Is blown tangentially into the first blown air swirling space 4c by the blowing pressure from the outside air blowing fan. Then, the air that has flown into the first blast air swirling space 4c with a predetermined level of dynamic pressure in the swirling direction is once blocked by the partition plate 41, and Is evenly distributed throughout.

Then, after that, the gas uniformly flows from the entire circumferential direction of the upper end side opening 40a into the annular rectifying passage 40R having a predetermined length in the vertical direction where the shape is stable and the passage diameter is reduced. Thus, the flow is narrowed at a stage where it flows through the annular rectification passage 40R for a predetermined time, and the flow velocity is further uniformed.

Then, the air flow having the further uniformed flow velocity is supplied from the lower opening 40b to the air outlet 3 as described above.
The air is uniformly blown while being swirled outward in the radial direction of the second blown air swirling space 4d expanding in the direction, and the inner circumferential surface on the lower end 4b side of the outside air blower chamber 4 and the outer circumferential surface of the shoulder 10c of the intake hood 10 are formed. Is supplied to the air outlet 3 continuously provided in the circumferential direction between the air outlet 3 and the air outlet 3. When passing through the air outlet passage of the air outlet 3, the swirling flow generating stators 30a, 30a,... Give a larger vector in the swirling direction, and the airflow velocity is more uniform in the entire circumferential direction. stable spiral whirling airflow F _1, and the same swirling airflow F ₁ is air direction control edge 14 close to the opening of the air outlet 3
Is immediately guided in the horizontal direction, and is blown out so as to cover the outer periphery of the cooking device in the lower predetermined local region.

As a result, the helical stable blow-off swirling air flow F ₁ forms a reliable air curtain flow that surrounds the smoke and odor coming out of the predetermined local area so as not to diffuse around. On the inner side in the central axis direction, an intake port 2a extending in a cylindrical shape to the vicinity of the air collecting opening 10a surface of the intake hood 10 of the intake duct 2 in the opposite direction.
Swirling air flow F ₂ stably major attraction tornado-like rising upward from below by the suction force of the suction fan is formed in the direction.

[0101] Thereby, reliable discharge of contaminated air such as smoke and odor from a predetermined local area wrapped by the air curtain flow composed of the spiral blowing swirl air flow F ₁ is achieved.
Cleaning becomes possible.

When the suction airflow has a tornado shape as described above, the rising temperature of the rising airflow increases, and the rise of the blowout airflow from the turbulence of the blown airflow caused by the temporary or instantaneous crosswind is increased.

(Embodiment 3) FIGS. 6 and 7 show a configuration of a tornado-type local ventilation apparatus employing a supply / exhaust apparatus according to Embodiment 3 of the present invention.

This embodiment differs from the tornado-type local ventilation system of the first embodiment in that the direction of the air flow control is further improved so that the air blowing direction can be more reliably set in the horizontal direction. 14 in the second embodiment.
This is characterized in that it is provided on the dome surface of the intake hood 10 in the same manner as the above.

In FIGS. 6 and 7, reference numeral 4 denotes a substantially conical outside air blower chamber (air supply chamber) provided above a predetermined local area such as the grille section. A dome-shaped intake hood 10 having a relatively shallow depth and having a relatively shallow depth in the exhaust direction is attached to the lower end 4 d of the opening edge 10 a of the air collection opening 10 a at the lower end 4 b of the outside air blow chamber 4. It is detachably provided in an offset state protruding downward from the side opening surface by a predetermined dimension (described later). And thereby
The outside air blowing chamber 4 and the intake hood 10 inside the outside air blowing chamber 4
The passage diameter gradually increases in the traveling direction for guiding the outside air introduced through the outside air introduction port 5a of the outside air blowing duct (air supply duct) 5 described later while effectively turning the outside air toward the later-described air outlet 3 direction. Is formed, and an air flow to be supplied to the air outlet 3 is formed into a swirling air flow having a predetermined flow velocity in advance.

The air outlet 3 to be described later is arranged such that the opening surface of the outside air blowing chamber 4 and the opening surface of the intake hood 10 are vertically offset by a predetermined dimension as described above. The apparatus body including the outside air blowing chamber 4 and the intake hood 10 utilizing a space formed over the entire circumference between the inner peripheral surface of the lower end 4b of the hood and the outer peripheral surface of the shoulder 10c of the intake hood 10. , And has a predetermined passage length in the blowing direction and is continuously opened in an annular shape in the entire circumferential direction.The diameter of the passage center portion gradually increases from the upper side to the lower side. It is formed obliquely at a predetermined expanding angle of inclination.

By the way, in the blowing space in the outside air blowing chamber 4, the flow velocity distribution of the air flow in the swirling direction introduced as described above, which is located above the intake hood 10, is uniform. There is provided an air flow control means having a flow velocity control structure for making the air flow control. As shown in FIG. 6, the airflow control means includes an upper first blown air swirling space 4c to which the outside air is supplied from the outside air blower duct 5 as shown in FIG.
A partition plate 41 for partitioning into a lower second blown air swirling space 4d which spreads radially outwardly on the side of the air outlet 3 described later;
The partition plate 41 is formed by an intake duct 2 and a cylindrical wall 40 having a predetermined diameter and a diameter larger than that of the sleeve 20, which are inserted and inserted through the center of the partition plate 41 in the vertical direction. Partition plate 41
Is located on the lower side of the ventilation space and has an outer peripheral end 41
b is attached to the inner peripheral wall surface of the outside air blowing chamber 4 via a ring-shaped corner bracket 42.

A circular opening edge of a sleeve structure for fitting and integrating the cylindrical wall 40 is formed at the center thereof by, for example, a punching method. And fixedly integrated by means such as screwing (or brazing). The cylindrical wall 40 is formed on the outer periphery of the sleeve 20 on the outer periphery of the intake duct 2 described below, and has a sufficient inner diameter so as to maintain a predetermined distance from the sleeve 20. The upper end side opening 40a keeps a predetermined distance from the top plate part 4a of the outside air blowing chamber 4, and the lower end side opening 40b is connected to the main body part 30 of the metal flat plate 30 described later.
b and is supported in a state where a predetermined interval is maintained,
The upper first blown air swirling space 4c and the lower second blown air swirl space 4d communicate with each other, and the swirling airflow on the first blown air swirling space 4c side is reduced in diameter. After the flow velocity distribution is made uniform, an annular rectifying passage 40R that flows to the side of the second blown air swirling space 4d is formed.

Further, the first air in the outside air blowing chamber 4
In the portion of the blown air swirling space 4c, a bent outside air inlet 5a at the front end side of the outside air blow duct 5 is provided to introduce outside air supplied from the outside in an oblique tangential direction (swirl direction).
Are connected in communication. In addition, the intake hood 1
0 is the top plate (top) 4a of the outside air blowing chamber 4
And the first and second blast air swirling spaces 4c and 4d and the intake hood 10 are vertically penetrated and introduced, and the lower end side intake port 2a of the intake hood 10 has an opening 10a for collecting air.
An intake duct (exhaust duct) 2 extending (projecting) in a cylindrical shape so as to be located near the surface is connected in a communicating state.
The outside air intake end of the outside air ventilation duct 5 and the inside air discharge end of the intake duct 2 are each extended outside.
An outside air blower fan and a suction fan (intake and exhaust fan) including, for example, a multi-blade blower (sirocco fan) are provided at ends of the outside air blower duct 5 and the intake duct 2 extending to the outside (not shown), respectively. By these driving, corresponding external air blowing action and intake / exhaust action are realized.

The above-described sleeve 20 that can penetrate the intake duct 2 inside is fitted around the inner and outer peripheral portions of the intake duct 2 between the first and second blast air swirling spaces 4c and 4d. The main body portion 30b of the swirling flow generating stators 30a, 30a,... Described later, and the intake hood 10 are integrated with the outside air blowing chamber 4 through the sleeve 20, as described later. I have.

The intake duct 2 is also inserted through the sleeve 20 so that the position of the intake port 2a is set at an appropriate position as described above and fixed.

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

As described above, the air outlet 3 is located between the inner peripheral surface on the lower end 4b side of the outside air blower chamber 4 and the outer peripheral surface of the shoulder 10c of the intake hood 10, and has a predetermined passage length. The opening is formed in an annular shape continuously in the entire circumferential direction, and is formed obliquely at a predetermined inclination angle such that the center diameter gradually increases from the upper side to the lower side. A plurality of swirling flow generating stators 30a, 30a,... Each having a predetermined inclination angle (radial angle) downward in the spiral direction are provided at predetermined intervals in the entire circumferential direction in the air blowing passage portion. It is juxtaposed.

The swirling flow generating stators 30a, 30a.
.. As shown in, for example, FIG. 2 described above, a swirl flow generating stator to be provided by making a cut in a parabolic direction at the outer peripheral edge of a circular metal flat plate 30 having a fitting opening to the sleeve 20 at the center. Each of the cut-out strips is positioned at a predetermined radial position on the donut-shaped main body 30b side of the metal plate 30 (in the radial direction). At a position (b), a predetermined angle is bent downward to form a shape having a predetermined vertical and horizontal dimension, a predetermined radial angle, and extending in the air blowing direction. Then, the inner peripheral edge of the central side fitting opening of the metal plate main body 30b is fitted and locked from above on the lower end side flange 20a of the sleeve 20 on the outer circumference of the intake duct 2, and the circular elongated hole 11a, 11a, and are fixed by screws 11b, 11b,... So that the swirling flow generating stators 30a, 30a,. It is to be installed.

Also, the upper surface of the dome-shaped intake hood 10 is provided on the lower surface side of the lower end flange 20a of the sleeve 20 which supports the metal plate main body 30b of the swirling flow generating stators 30a. The plate portion 10b is integrally attached by a detachable attachment means such as a slide engagement method so that the plate portion 10b can be easily attached or detached from below.

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

The outer surface of the dome main body above the lower end 10d of the cylindrical opening edge of the intake hood 10 is provided with the airflow from the air outlet 3 in the horizontal direction as much as possible. A wind direction control edge 14 for guiding is provided near the air outlet 3.

As shown in detail in FIG. 7, for example, the wind direction control edge 14 extends from the lower edge of the dome body of the intake hood 10 to the control surface forming edge 1 extending horizontally.
4a and an engaging edge portion 14b which is bent in an inward U-shape on the outer end side to lock the horizontal edge portion 14c on the lower end 10d side of the cylindrical opening edge portion.

On the other hand, in the case of this configuration, the lower end 4e of the lower end 4b of the outside air blower chamber 4 is formed by extending the lower end of the air outlet 3 of the blower chamber 4 downward as in the first embodiment. The air outlet 3 is formed to be narrower toward the outer peripheral surface side (dome surface side) of the dome main body portion of the intake hood 10.

According to such a configuration, the air outlet 3 itself is deviated and narrowed toward the outer peripheral surface side (dome surface side) of the dome main body portion of the intake hood 10, and the upper surface of the lower wind direction control edge portion 14 is reduced. From the air outlet 3
On the upstream side, the blow-off airflow flowing toward the blower chamber 4 is also converged on the outer peripheral side of the dome body portion of the intake hood 10 on the downstream side of the air outlet 3, so that the flow is stable with a uniform flow velocity distribution. Becomes

In addition, in this configuration, in addition to the above, the blown airflow blown out from the air outlet 3 is guided outwardly in the horizontal direction on the upper surface of the wind direction control edge 14 immediately after leaving the air outlet 3. Thus, the blowing direction can be more effectively stabilized in the horizontal direction without decelerating the wind speed of the blowing airflow, and a uniform and turbulent swirling airflow can be generated.

In this case, the air collecting opening 10a of the intake hood 10 has an opening edge lower end 10d.
Is formed in a tubular shape by extending straight below the wind direction controlling edge portion 14 by a predetermined distance.

As described above, when the wind direction control edge 14 is provided on the outer peripheral side of the intake hood 10, the wind direction control edge 14 is located radially outward from the opening surface of the air collection opening 10a of the intake hood 10. Hood 1
Velocity component in the radially outward side of one of the rising swirling outer peripheral side of the air flow F ₂ which is gas collector into the 0 becomes stronger, the intake hood 1
0, it tends to leak outside, and the collection efficiency in the exhaust direction decreases.

However, as described above, the intake hood 10
If the opening edge 10d of the air collecting opening 10a is formed in a tubular shape extending straight below a predetermined dimension below the edge 14 for controlling the wind direction, the upward swirling airflow F in the exhaust direction will be described. those ₂ on the outer circumferential side, for example, as shown in FIG. 7,
Before the velocity component in the radially outward direction becomes strong, the air can be reliably sucked into the air intake opening 10a side of the intake hood 10, and the collection efficiency in the exhaust direction can be improved. it can.

Therefore, in the above configuration, if the outside air blower fan on the side of the outside air blower duct 5 and the intake fan on the side of the intake duct 2 are driven, for example, first, the outside air inlet 5a Is blown tangentially into the first blown air swirling space 4c by the blowing pressure from the outside air blowing fan. Then, the air that has flown into the first blast air swirling space 4c with a predetermined level of dynamic pressure in the swirling direction is once blocked by the partition plate 41, and Is evenly distributed throughout.

Then, after that, the gas flows uniformly into the annular rectifying passage 40R having a predetermined length in the vertical direction in which the shape is stabilized and the passage diameter is reduced, from the entire circumferential direction of the upper end side opening 40a. Thus, the flow is narrowed at a stage where it flows through the annular rectification passage 40R for a predetermined time, and the flow velocity is further uniformed.

Then, the air flow having the further uniformed flow velocity is supplied from the lower end side opening 40b to the air outlet 3 as described above.
The air is uniformly blown while being swirled outward in the radial direction of the second blown air swirling space 4d expanding in the direction, and the inner circumferential surface on the lower end 4b side of the outside air blower chamber 4 and the outer circumferential surface of the shoulder 10c of the intake hood 10 are formed. Is supplied to the air outlet 3 continuously provided in the circumferential direction between the air outlet 3 and the air outlet 3. When passing through the air outlet passage of the air outlet 3, the swirling flow generating stators 30a, 30a,... Give a larger vector in the swirling direction, and the airflow velocity is more uniform in the entire circumferential direction. stable spiral whirling airflow F _1, and the outer periphery of the cooking appliance with the lower edge 4e and direction control edge 14 of the lower portion 4b of the outside air blower chamber 4 is guided horizontally on the lower side a predetermined local region It is blown out to cover.

[0128] As a result, the blow-out whirling air current F ₁ which is stable horizontal direction crosswind strong spiral, the predetermined local smoke and odors emanating from the region surrounding so as not to diffuse around reliable air curtain flow It is formed, and its inner side in the central axis direction is directed in the opposite direction to the direction of the intake port 2a extending in a cylindrical shape to the vicinity of the air collecting opening 10a surface of the intake hood 10 of the intake hood 10. swirling air flow F ₂ stably a large suction force of the tornado-like rising from the lower side to the upper side is formed by the suction force of the suction fan.

[0129] Thereby, reliable exhaustion of contaminated air such as smoke and odor from a predetermined local area wrapped by the air curtain flow composed of the spiral blow-off swirl air flow F ₁ is achieved.
Cleaning becomes possible.

When the suction airflow has a tornado shape as described above, the rising temperature of the rising airflow is improved, and the rise of the blowout airflow from the turbulence of the blown airflow caused by the temporary or instantaneous crosswind is increased.

(Embodiment 4) FIGS. 8 and 9 show the configuration of a tornado-type local ventilation apparatus employing a supply / exhaust apparatus according to Embodiment 4 of the present invention.

In this embodiment, the configuration of the tornado-type local ventilation device of the second embodiment in which the wind direction control edge 14 is provided on the dome surface side is the same as that of the tornado-type local ventilation device of the first embodiment. In order to realize the same operation as the lower edge 4e, the outside air blowing chamber 4
An airflow control edge 4f extending toward the outer peripheral surface of the dome body portion of the intake hood 10 is provided inside the lower end portion 4b of the intake hood.

In FIG. 8 and FIG. 9, reference numeral 4 designates, for example, a substantially conical external air blowing chamber (air supply chamber) provided above a predetermined local area such as a grill portion on a customer table of the above-mentioned yakiniku restaurant. Yes, this outside air blowing chamber 4
A dome-shaped intake hood 10 having a relatively deep dome shape in the exhaust direction is provided at a predetermined distance from the lower end 4d of the opening edge 10a of the air collection opening 10a at the lower end 4b of the outside air blower chamber 4. It is detachably provided in an offset state protruding downward from the side opening surface by a predetermined dimension (described later). And, thereby, the outside air blowing chamber 4
Between the air intake hood 10 and the inside thereof, through the outside air inlet 5a of an outside air blower duct (air supply duct) 5 described later, to effectively turn the outside air and guide it toward the air outlet 3 described later. A ventilation space having a passage diameter gradually enlarged in the traveling direction of the air is formed, and an air flow to be supplied to the air outlet 3 is formed into a swirling air flow having a predetermined flow velocity in advance.

The air outlet 3 to be described later is arranged such that the opening surface of the outside air blowing chamber 4 and the opening surface of the intake hood 10 are vertically offset by a predetermined dimension as described above. The apparatus body including the outside air blowing chamber 4 and the intake hood 10 utilizing a space formed over the entire circumference between the inner peripheral surface of the lower end 4b of the hood and the outer peripheral surface of the shoulder 10c of the intake hood 10. , And has a predetermined passage length in the blowing direction and is continuously opened in an annular shape in the entire circumferential direction.The diameter of the passage center portion gradually increases from the upper side to the lower side. It is formed obliquely at a predetermined expanding angle of inclination.

By the way, in the blowing space in the outside air blowing chamber 4, the flow velocity distribution of the air flow in the swirling direction introduced as described above, which is located above the intake hood 10, is uniform. There is provided an air flow control means having a flow velocity control structure for making the air flow control. As shown in FIG. 8, the airflow control means includes an upper first blown air swirling space 4 c to which the outside air is supplied from the outside air blower duct 5.
A partition plate 41 for partitioning into a lower second blown air swirling space 4d which spreads radially outwardly on the side of the air outlet 3 described later;
The partition plate 41 is formed by an intake duct 2 and a cylindrical wall 40 having a predetermined diameter and a diameter larger than that of the sleeve 20, which are inserted and inserted through the center of the partition plate 41 in the vertical direction. Partition plate 41
Is located on the lower side of the ventilation space and has an outer peripheral end 41
b is attached to the inner peripheral wall surface of the outside air blowing chamber 4 via a ring-shaped corner bracket 42.

A circular opening edge of a sleeve structure for fitting and integrating the cylindrical wall 40 is formed at the center thereof by, for example, a punching method. And fixedly integrated by means such as screwing (or brazing). The cylindrical wall 40 is formed on the outer periphery of the sleeve 20 on the outer periphery of the intake duct 2 described below, and has a sufficient inner diameter so as to maintain a predetermined distance from the sleeve 20. The upper end side opening 40a keeps a predetermined distance from the top plate part 4a of the outside air blowing chamber 4, and the lower end side opening 40b is connected to the main body part 30 of the metal flat plate 30 described later.
b and is supported in a state where a predetermined interval is maintained,
The upper first blown air swirling space 4c and the lower second blown air swirl space 4d communicate with each other, and the swirling airflow on the first blown air swirling space 4c side is reduced in diameter. After the flow velocity distribution is made uniform, an annular rectifying passage 40R that flows to the side of the second blown air swirling space 4d is formed.

Further, the first air blow chamber 4
In the portion of the blown air swirling space 4c, a bent outside air inlet 5a at the front end side of the outside air blow duct 5 is provided to introduce outside air supplied from the outside in an oblique tangential direction (swirl direction).
Are connected in communication. In addition, the intake hood 1
0 is the top plate (top) 4a of the outside air blowing chamber 4
The first and second blast air swirling spaces 4c and 4d and the intake hood 10 are vertically penetrated and introduced, and the lower end side intake port 2a of the intake hood 10 is provided with an opening 10a for collecting air.
An intake duct 2 extending (projecting) in a cylindrical shape so as to be located near the surface is connected in a communicating state. The outside air intake end of the outside air blow duct 5 and the inside air discharge end of the intake duct 2 are each extended outside. At the outside ends of the outside air ventilation duct 5 and the intake duct 2 which are not shown in the drawing, an outside air ventilation fan and a suction fan (intake / exhaust fan) including, for example, a multi-blade fan (sirocco fan) are provided. By these driving, a corresponding outside air blowing action and intake / exhaust action are realized.

The above-described sleeve 20 which can penetrate the intake duct 2 inside is fitted on the inner and outer peripheral portions of the intake duct 2 between the first and second blown air swirling spaces 4c and 4d. The main body portion 30b of the swirling flow generating stators 30a, 30a,... Described later, and the intake hood 10 are integrated with the outside air blowing chamber 4 through the sleeve 20, as described later. I have.

The intake duct 2 is also inserted through the sleeve 20 so that the position of the intake port 2a is set at an appropriate position as described above and fixed.

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

As described above, the air outlet 3 is located between the inner peripheral surface on the lower end 4b side of the outside air blowing chamber 4 and the outer peripheral surface of the shoulder 10c of the intake hood 10, and has a predetermined passage length. The opening is formed in an annular shape continuously in the entire circumferential direction, and is formed obliquely at a predetermined inclination angle such that the center diameter gradually increases from the upper side to the lower side. A plurality of swirling flow generating stators 30a, 30a,... Each having a predetermined inclination angle (radial angle) downward in the spiral direction are provided at predetermined intervals in the entire circumferential direction in the air blowing passage portion. It is juxtaposed.

The swirling flow generating stators 30a, 30a.
.. As shown in, for example, FIG. 2 described above, a swirl flow generating stator to be provided by making a cut in a parabolic direction at the outer peripheral edge of a circular metal flat plate 30 having a fitting opening to the sleeve 20 at the center. Each of the cut-out strips is positioned at a predetermined radial position on the donut-shaped main body 30b side of the metal plate 30 (in the radial direction). At a position (b), a predetermined angle is bent downward to form a shape having a predetermined vertical and horizontal dimension, a predetermined radial angle, and extending in the air blowing direction. Then, the inner peripheral edge of the central side fitting opening of the metal plate main body 30b is fitted and locked from above on the lower end side flange 20a of the sleeve 20 on the outer circumference of the intake duct 2, and the circular elongated hole 11a, 11a, and are fixed by screws 11b, 11b,... So that the swirling flow generating stators 30a, 30a,. It is to be installed.

Also, the upper surface of the dome-shaped intake hood 10 is provided on the lower surface side of the lower end side flange 20a of the sleeve 20 which supports the metal plate main body 30b of the swirl flow generating stators 30a. The plate portion 10b is integrally attached by a detachable attachment means such as a slide engagement method so that the plate portion 10b can be easily attached or detached from below.

That is, as shown in FIG. 2 described above, the intake hood 10 is mounted on the lower surface of the lower end side flange 20a of the sleeve 20 in the form of a hook-shaped engaging piece 13, 13 having a predetermined vertical gap. Are provided on the top plate 10b side of the intake hood 10, and the engagement pieces 13, 13,.
Is arbitrarily fitted, and is slid in the circumferential direction by a predetermined rotation angle from the fitted position, so that the side edge portion enters the gap and engages so as to overlap in the positioning state. Are provided by providing the screws 15, 12,.
15 fixed.

The air flow from the air outlet 3 is as horizontal as possible on the outer peripheral surface of the dome main body above the upper end of the cylindrical opening edge lower end 10 d of the intake hood 10. Wind direction control edge 14 for guiding in the direction
Is provided near the air outlet 3.

As shown in detail in FIG. 9, for example, the wind direction control edge 14 is a control surface forming edge 14 extending horizontally below the lower edge of the dome body of the intake hood 10.
a and a locking edge 14b which is bent inward in the U-shape on the outer end side and locks the upper horizontal edge 14c of the lower end 10d of the cylindrical opening edge. On the other hand, inside the lower end 4b of the air outlet 3 of the blower chamber 4 forming the air outlet 3, the intake hood 10 is provided.
An airflow control edge 4f extending in the direction is provided, and the air outlet 3 is formed narrower toward the intake hood 10 side.

Therefore, in this configuration, the airflow blown out from the air outlet 3 is made to flow as close to the dome surface side as possible due to the airflow control edge 4f on the air outlet 3 side. Immediately after exiting the air outlet 3, the air is guided outward in the horizontal direction on the upper surface of the wind direction control edge 14, and by their respective actions, the blowing direction can be more effectively reduced without reducing the wind speed of the blowing airflow. Can be stabilized in the horizontal direction, and a uniform and turbulent swirling airflow can be generated.

In this case, the air collecting opening 10a of the intake hood 10 has an opening edge lower end 10d.
Is formed in a tubular shape by extending straight below the wind direction controlling edge portion 14 by a predetermined distance.

As described above, when the wind direction control edge 14 is provided on the outer peripheral side of the intake hood 10, the wind direction control edge 14 is located radially outward from the opening surface of the air collection opening 10 a of the intake hood 10. Hood 1
Velocity component in the radially outward side of one of the rising swirling outer peripheral side of the air flow F ₂ which is gas collector into the 0 becomes stronger, the intake hood 1
0, it tends to leak outside, and the collection efficiency in the exhaust direction decreases.

However, as described above, the intake hood 10
If the opening edge 10d of the air collecting opening 10a is formed in a tubular shape extending straight below a predetermined dimension below the edge 14 for controlling the wind direction, the upward swirling airflow F in the exhaust direction will be described. those ₂ on the outer circumferential side, for example, as shown in FIG. 9,
Before the velocity component in the radially outward direction becomes strong, the air can be reliably sucked into the air intake opening 10a side of the intake hood 10, and the collection efficiency in the exhaust direction can be improved. it can.

Therefore, in the above configuration, if the outside air blower fan on the side of the outside air blower duct 5 and the intake fan on the side of the intake duct 2 are driven, for example, first, the outside air inlet 5a Is blown tangentially into the first blown air swirling space 4c by the blowing pressure from the outside air blowing fan. Then, the air that has flown into the first blast air swirling space 4c with a predetermined level of dynamic pressure in the swirling direction is once blocked by the partition plate 41, and Is evenly distributed throughout.

After that, the upper end side opening 40a uniformly flows into the annular rectifying passage 40R having a predetermined length in the vertical direction in which the shape is stable and the passage diameter is reduced. Thus, the flow is narrowed at a stage where it flows through the annular rectification passage 40R for a predetermined time, and the flow velocity is further uniformed.

Then, the air flow whose flow velocity has been made uniform is supplied from the lower end side opening 40b to the air outlet 3 as described above.
The air is uniformly blown while being swirled outward in the radial direction of the second blown air swirling space 4d expanding in the direction, and the inner circumferential surface on the lower end 4b side of the outside air blower chamber 4 and the outer circumferential surface of the shoulder 10c of the intake hood 10 are formed. Is supplied to the air outlet 3 continuously provided in the circumferential direction between the air outlet 3 and the air outlet 3. When passing through the air outlet passage of the air outlet 3, the swirling flow generating stators 30a, 30a,... Give a larger vector in the swirling direction, and the airflow velocity is more uniform in the entire circumferential direction. stable spiral whirling airflow F ₁ becomes, after being blown out from the dome surface to the air direction control edge 14 direction by the airflow control edge 4f, heating guided by the wind direction control edge 14 in the lower side by a predetermined local region It is blown out horizontally so as to cover the outer periphery of the cooking utensil.

[0154] As a result, the blow-out whirling air current F ₁ stably crosswinds strong spirally horizontal direction, said predetermined local smoke and odors emanating from the region surrounding so as not to diffuse around reliable air curtain flow It is formed, and its inner side in the central axis direction is directed in the opposite direction to the direction of the intake port 2a extending in a cylindrical shape to the vicinity of the air collecting opening 10a surface of the intake hood 10 of the intake hood 10. swirling air flow F ₂ stably a large suction force of the tornado-like rising from the lower side to the upper side is formed by the suction force of the suction fan.

Thus, reliable discharge of contaminated air such as smoke and odor from a predetermined local area wrapped by the air curtain flow composed of the spiral blowing air flow F ₁ is achieved.
Cleaning becomes possible.

When the suction airflow has a tornado shape as described above, the rising temperature of the rising airflow is improved, and the rise of the blowout airflow from the turbulence of the blown airflow caused by the temporary or instantaneous crosswind is increased.

(Embodiment 5) FIGS. 10 to 12 show the configuration of a tornado-type local ventilation apparatus which employs a supply / exhaust apparatus according to Embodiment 5 of the present invention.

This embodiment is described with reference to FIGS.
As shown in the above, in the configuration of the tornado-type local ventilation device of the third embodiment described above, the wind direction control edge portion 14 for setting the air blowing direction to the horizontal direction more reliably is provided on the upper surface in the circumferential direction at a predetermined interval. A plurality of slits 14d, 14d,... Penetrating from the side to the lower surface side are formed, thereby realizing a downward air blowing airflow.

The structure and operation of the other parts are exactly the same as those of the third embodiment.

Thus, the plurality of slits 14d, 14
If the air can be blown not only in the horizontal direction but also in the lower direction through d..., the rising speed of the suction rising airflow from the lower side to the upper side is improved by the downward blowing airflow, and the temporary or instantaneous Recovery from the turbulence of the blown airflow due to the crosswind blowing in is accelerated.

As a result, the air conditioning load in the local area can be reduced.

(Embodiment 6) FIGS. 13 and 14 show a configuration of a tornado-type local ventilation apparatus which employs an air supply / exhaust apparatus according to Embodiment 6 of the present invention.

The tornado-type local ventilation device of this embodiment differs from the above-described embodiments in that the shape of the device body is rectangular, and the air outlets on the sides of the rectangular device body. Slits 55a and 55a corresponding to the portion 53 and performing the same operation as that of the fifth embodiment.
.. Are provided.

In FIGS. 13 and 14, reference numeral 50 denotes a substantially rectangular parallelepiped external air blowing chamber provided above a predetermined local area having a source of contaminated air such as odor and smoke, and having an open lower surface. Inside the outside air blowing chamber 50, an intake hood 60 in the exhaust direction, which gradually becomes smaller in diameter from the lower part of the truncated pyramid shape to the upper part at a predetermined interval between the top plate part 50a and the side wall part 50b. Extend to a position below a lower end side opening surface of the outside air blowing chamber 50 by a predetermined dimension and are integrally provided (offset installation). Thus, outside air blown between the outside air blowing chamber 50 and the intake hood 60 inside the outside air blowing duct 5 through the outside air inlet 5a of the outside air blowing duct 5 described later is introduced into the air outlet 53. A space is formed. The outside air blowing space is provided with two upper and lower first cylindrical walls 70 provided on the outer periphery of the side wall portion 60 b of the intake hood 60.
And the second cylindrical wall 52, a rectifying passage 70R for increasing the flow velocity and an air outlet 53 are formed. Further, the partition wall (partition plate) 70c supporting the lower end of the first cylindrical wall 70 allows the outside air blowing space to be divided into the first and second air supply spaces 51.
A, 51B. The rectification passage 70
R corresponds to, for example, the rectifying passage 40R in the cylindrical wall 40 in each of the above-described embodiments.

Further, an outside air inlet 5a of the outside air blowing duct 5 is connected to one side of the top plate 50a of the outside air blowing chamber 50 so as to introduce outside air supplied through the outside air blowing duct 5. An opening for connecting an outside air inlet is provided at the center of the top plate 50a of the outside air blowing chamber 50 and the top plate 60a of the intake hood 60.
Openings are provided for connecting the air inlets, and the air inlet 5a of the air blow duct 5 and the air inlet 2a of the air inlet duct 2 are connected in communication with each other. It extends outside. An outside air blower fan and a suction fan (exhaust fan) including, for example, a multi-blade blower (sirocco fan) are provided at the extension end of each of the outside air blower duct 5 and the intake duct 2 to the outside (not shown). , The corresponding outside air blowing action and exhaust action are realized.

In the case of this embodiment, the air outlet 53 is connected to, for example, the outside air blowing chamber 50.
In the lower side opening surface (side wall 50b lower end side opening surface) of
Is formed between the cylindrical wall 52 and the outer peripheral surface of the side wall portion 60b of the intake hood 60 so as to be continuous in the entire circumferential direction, and has a predetermined inclination angle outward from the upper position to the lower position. It is formed diagonally. In the air blowing passage portion, swirling flow generating stators 54 having a predetermined inclination angle downward in the spiral direction are arranged side by side at predetermined intervals in the entire circumferential direction.

The lower end 61 of the intake hood 60
Is formed to extend downward (bent) straight to a substantially equal diameter at the lower side so as to be lower than the outer peripheral end of the air outlet 53, and to form a substantially equal-diameter cylindrical body. An air collecting opening 60a having an area is formed. On the left and right of the upper position of the air collecting opening 60a, as the air purifying means, the air collecting guide plates 64, 64 having a C-shaped cross section forming the air collecting opening 60a together with the cylindrical lower end 61. The grease filters 80, 80 are arranged side by side with their tops closed and connected to each other by the connection closing plate 63 via the oil receivers 62, 62 supported by the above, with the lower side opened in a C shape. The grease filter removes oil mist components in the room air that is sucked into the lower air collecting space 81 through the air collecting opening 60a and flows through the upper air collecting space 82 toward the intake port 2a of the intake duct 2. At 80, 80, they are collected and removed. When the oil mist component is collected, the oil flowing down from the grease filters 80, 80 is retained in the lower oil receivers 62, 62 through the openings 62a of the lower support member, and is taken out through a desired oil extraction passage. (See FIG. 14).

Then, the intake hood inclined surface 6 above the upper end of the cylindrical lower end 61 of the intake hood 60.
On the outer peripheral surface of the air outlet 0c, a wind direction control edge 55 for guiding a blown air flow blown from the air outlet 53 in a horizontal direction as much as possible is provided near the air outlet 53. In the wind direction control edge 55, slits 55a similar to those of the above-described fifth embodiment are provided.
・ Is provided.

Therefore, the air blown out from the wind direction control edge 55 immediately exits the air outlet 53 and is guided outwardly in the horizontal direction on the upper surface of the wind direction control edge 55, so that the air is effectively blown out. The blowing direction can be stabilized in the horizontal direction without decelerating the wind speed of the airflow, and a uniform and turbulent swirling airflow can be generated.

Further, in this case, slits 55a, 55a,... Penetrating from the upper surface side to the lower surface side are provided in the wind direction control edge portion 55, and as shown in FIG. The stream F ₁ ′ is blown out.

As described above, the swirling air flow F is not only directed horizontally but also downward through the slits 55a, 55a.
'When to be able to blow out, in addition to the effects described above, balloon swirling airflow F ₁ downward' ₁ improves the rising speed of the suction updraft F ₂ from below to above by,
The recovery from the turbulence of the blown airflow due to the temporary or instantaneous crosswind blows faster.

As a result, the air conditioning load in the local area can be further reduced.

Therefore, in the above configuration, if, for example, the outside air blowing fan on the side of the outside air blowing duct 5 and the exhaust fan on the side of the exhaust duct 2 are driven in the state shown in the figure, first, Outside air inlet 5a
The outside air guided by the outside air blower fan,
First, the air is blown into the first air supply space 51A. Then, by flowing from the first air supply space 51A to the downstream 70b side from the upstream 70a side to the downstream 70b side in the rectification passage 70R, an air flow having a more uniform flow velocity is obtained, and the external air blowing space in the external air blowing chamber 50 is formed. Into the second air supply space 51B, from the second air supply space 51B, through the air blowing passage in the second cylindrical wall 52, and on the downstream side of the outer periphery of the lower portion of the side wall portion 60b of the intake hood 60 (see FIG. The air is supplied to the air outlet 53 on the side of the apparatus main body). Then, when passing through the air outlet passage of the air outlet 53 parts, by the swirling flow generating stator 54 ..., turning direction vector is granted, it becomes strong spiral whirling airflow F ₁ above It is blown out both horizontally and downward as shown.

As a result, the horizontal component F ₁ of the blown spiral swirling airflow is resistant to the side wind surrounding the smoke and odor from the cooking appliance in the predetermined local area so as not to diffuse to the surroundings. An air curtain is formed, and an air collection opening 60a of the intake hood 60 on the exhaust duct 2 side in the opposite direction to the air curtain is formed inside the air curtain.
Swirling air flow F ₂ large suction force tornado-like rising from the lower side to the upper side by the suction force of the exhaust fan is formed in the direction.

[0175] And, it thereby secure the intake of air contaminated smoke and odors like cooking appliance part wrapped by an air curtain formed of blow whirling airflow F ₁ of the spiral, and can be cleaned.

In this case, as described above, the wind direction control edge portion 55 is provided with slits 55a, 55a,... Penetrating from the upper surface side to the lower surface side. F ₁ ′ is blown out.

Therefore, as shown in FIG. 13 and FIG. 14, for example, the upward blowing speed of the suction upward airflow from the lower side to the upper side is improved by the downward blowing swirling airflow F ₂ ′, and the crosswind blows temporarily or momentarily. The recovery from the turbulence of the blowout airflow due to is accelerated.

As a result, the air conditioning load can be effectively reduced.

In the above configuration, the room air flowing in the direction of the intake duct 2 through the air collecting opening 60a as described above is juxtaposed in the intake hood 60 as described above. The oil mist components are reliably collected and removed by the grease filters 80, 80 provided. Therefore, the inside of the exhaust duct 2 does not become clogged with the oil mist component, and the maintenance becomes easy.

In the case of this embodiment, the air outlet 53 is formed, for example, by vertically offsetting the lower end side opening surfaces of the outside air blowing chamber 50 and the intake hood 60 by a predetermined dimension. Utilizing a space formed between the inner peripheral surface of the lower end side opening side wall and the outer peripheral surface of the side wall portion of the intake hood 60, it has a predetermined passage length in the blowing direction and is continuous in all circumferential directions. It is formed in an annular shape with a predetermined inclination angle from the upper side to the lower side.

Therefore, in this configuration, it is possible to form the air collecting opening 60a having a large opening area substantially the same as the opening surface on the lower surface side of the outside air blowing chamber 50. As a result, the outside diameter of the outside air blowing chamber 50 becomes necessary. Air collecting opening 60a
An outer diameter corresponding to the opening diameter is sufficient, so that the apparatus main body can be formed compact.

In the tornado-type air supply / exhaust device of this embodiment, since the device main body has a rectangular parallelepiped shape as a whole, it can be easily provided at a corner (corner) of a room where the walls are orthogonal to each other. Become.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a tornado-type local ventilation device including a supply / exhaust device according to Embodiment 1 of the present invention.

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

FIG. 3 is an enlarged sectional view showing an operation of a main part of the device.

FIG. 4 is a cross-sectional view illustrating a configuration of a tornado-type local ventilation device configured by a supply / exhaust device according to Embodiment 2 of the present invention.

FIG. 5 is an enlarged sectional view showing an operation of a main part of the device.

FIG. 6 is a cross-sectional view illustrating a configuration of a tornado-type local ventilation device including a supply / exhaust device according to Embodiment 3 of the present invention.

FIG. 7 is an enlarged sectional view showing the operation of the same device.

FIG. 8 is a cross-sectional view illustrating a configuration of a tornado-type local ventilation device including a supply / exhaust device according to Embodiment 4 of the present invention.

FIG. 9 is an enlarged sectional view showing the operation of the main part of the device.

FIG. 10 is a cross-sectional view illustrating a configuration of a tornado-type local ventilation device including a supply / exhaust device according to Embodiment 5 of the present invention.

FIG. 11 is an enlarged plan view showing a configuration of a main part of the device.

FIG. 12 is an enlarged sectional view showing the operation of the main part of the device.

FIG. 13 is a cross-sectional view illustrating a configuration of a tornado-type local ventilation device including a supply / exhaust device according to Embodiment 6 of the present invention.

FIG. 14 is an enlarged sectional view showing the operation of the main part of the device.

FIG. 15 is a cross-sectional view illustrating a configuration of a tornado-type ventilation device including a supply / exhaust device according to a conventional example.

FIG. 16 is an enlarged sectional view showing the operation of the main part of the device.

FIG. 17 is an enlarged sectional view showing another operation of the main part of the same device.

[Explanation of symbols]

2 is an intake duct, 2a is an intake port of the intake duct 2, 3 is an air outlet, 4 is an outside air blowing chamber, 4c is a first blowing air turning space, 4d is a second blowing air turning space, and 5 is an outside air blowing. A duct, 5a is an outside air inlet of the outside air blowing duct 5,
10 is an intake hood, 10a is an air intake opening of the intake hood,
14 is a wind direction control edge, 14d is a slit, 30 is a circular metal flat plate, 30a is a swirling flow generation stator, 30b is a metal flat plate main body, 40 is a cylindrical wall, 40R is a straightening passage, 41 is a partition plate, and 50 is outside air. A blowing chamber, 55 is a wind direction control edge, 60 is an intake hood, and 80 is a Chris filter.

Claims (6)

[Claims] 1. An intake hood (10), (60) having an opening diameter gradually decreasing from a lower side to an upper side for collecting and exhausting air in a lower predetermined local area, and the intake hood (1).
0) and (60) at the upper outer periphery of the intake hood (1).
0), (60) The ventilation chambers (4), (50) whose opening diameter gradually decreases from the lower side to the upper side forming the air supply space and the air outlets (3), (53) with the outer peripheral surface.
And a wind direction control edge () that is provided on the outer periphery of the lower end of the intake hoods (10) and (60) and guides air blown obliquely downward from the air outlets (3) and (53) in the horizontal direction. 14) and (55), the lower end of the air outlets (3) and (53) of the blower chambers (4) and (50) is extended downward, so that A supply / exhaust device characterized in that the outlets (3) and (53) are narrowed toward the outer peripheral surface of the intake hoods (10) and (60). 2. An intake hood (10), (60) having an opening diameter gradually decreasing from a lower side to an upper side for collecting and exhausting air in a lower predetermined local area, and said intake hood (1).
0), (60) from the lower side forming an air supply space and air outlets (3), (53) between the intake hoods (10), (60) and the outer peripheral surface thereof. The ventilation chambers (4), (5) whose opening diameter gradually decreases toward the upper side
0), and a wind direction control edge provided on the outer periphery of the lower end of the intake hoods (10) and (60) to guide the air blown obliquely downward from the air outlets (3) and (53) in the horizontal direction. In the air supply / exhaust apparatus provided with the air intake hood (10), the air supply vents (3) and (53) of the air blowing chambers (4) and (50) are provided at the lower ends thereof. ), The airflow control edge (4) extending in the (60) direction.
f), the air outlets (3),
An air supply / exhaust device characterized in that (53) is narrowed toward the intake hoods (10) and (60). 3. An intake hood (10), (60) having an opening diameter gradually decreasing from a lower side to an upper side for collecting and exhausting air in a lower predetermined local area, and the intake hood (1).
0) and (60) at the upper outer periphery of the intake hood (1).
0), (60) The ventilation chambers (4), (50) whose opening diameter gradually decreases from the lower side to the upper side forming the air supply space and the air outlets (3), (53) with the outer peripheral surface.
And a wind direction control edge () that is provided on the outer periphery of the lower end of the intake hoods (10) and (60) and guides air blown obliquely downward from the air outlets (3) and (53) in the horizontal direction. 14) and (55), by providing the wind direction control edges (14) and (55) above the lower ends of the intake hoods (10) and (60), An air supply / exhaust device characterized in that the space between the air outlets (3) and (53) and the wind direction control edges (14) and (55) is formed narrow. 4. An intake hood (10), (60) whose opening diameter gradually decreases from a lower side to an upper side for collecting and exhausting air in a lower predetermined local area, and the intake hood (1).
0) and (60) at the upper outer periphery of the intake hood (1).
0), (60) The ventilation chambers (4), (50) whose opening diameter gradually decreases from the lower side to the upper side forming the air supply space and the air outlets (3), (53) with the outer peripheral surface.
And a wind direction control edge () that is provided on the outer periphery of the lower end of the intake hoods (10) and (60) and guides air blown obliquely downward from the air outlets (3) and (53) in the horizontal direction. 14) and (55), the lower end of the air outlets (3) and (53) of the blower chambers (4) and (50) is extended downward, so that The outlets (3) and (53) are narrowed toward the intake hoods (10) and (60).
By providing the wind direction control edges (14) and (55) above the lower ends of the intake hoods (10) and (60), the air outlets (3) and (53) and the wind direction control are provided. An air supply / exhaust device characterized in that the space between the edges (14) and (55) is narrow. 5. The air outlets (3), (53) are provided with swirling flow generating means (30a), (30a)... So that the blown air is spirally swirled. The air supply / exhaust device according to claim 1, 2, 3, or 4, wherein: 6. The wind direction control edges (14), (55)
Slits (14d) penetrating from the upper surface side to the lower surface side, (1
4d)..., (55a), (55a)... Are provided, and air is blown downward. 5. The air supply / exhaust device according to 5.