JP2003083580A - Air supply/exhaust apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To illuminate a shade under hoods in an air supply/exhaust apparatus having an air supply hood and an air suction hood. SOLUTION: The air supply/exhaust apparatus blows an air from an air supply duct 7 as an air curtain flow from an air outlet 4 opened in a circumferential direction to an outer periphery of a predetermined local area via the air supply hood 1, sucks and exhausts the air in the predetermined local area surrounded by the air curtain flow in a direction of the air suction duct 8 opened in the hood 2 via the suction hood 2 lower than the air outlet 4. The apparatus has an illuminator 40 installed detachably by utilizing an outer peripheral wall of the hood 1 to illuminate the predetermined area under the hood 1 and the hood 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention forms an air curtain flow so as to surround the outer periphery of a predetermined local region, and exhausts the air in the local region in the air curtain flow in the opposite direction to exhaust the air. The present invention relates to the air supply / exhaust device.

[0002]

2. Description of the Related Art For example, as an example of an air supply / exhaust device that ventilates a predetermined local area, air from an air supply duct is passed from an air outlet opening in the circumferential direction to an outer periphery of the predetermined local area via an air supply hood. Air in the predetermined local region surrounded by the air curtain flow while being blown out as an air curtain flow toward the intake duct direction opened in the intake hood through the intake hood below the air outlet. Several tornado-type devices that have been designed to suck and exhaust air have already been proposed.

[0003]

By the way, in the air supply / exhaust device as described above, the hood portion is installed in various places where high-efficiency ventilation is required, such as exhaust of oil smoke on the table of the seat of a yakiniku restaurant. It is installed at a relatively low position, but since both the air supply hood and the intake hood have a certain size, they block the light from the ceiling side illumination source at night, etc. There is a problem of darkening the ventilation area. This phenomenon is particularly remarkable when the illumination source is located directly above the device.

The present invention has been made in order to solve such a problem, and when constructing a tornado type local ventilation device or the like as described above, for example, by utilizing an outer peripheral wall portion of an air supply hood, A lighting device that can brightly illuminate the ventilation target area under the air supply hood and the intake hood is installed so that it can be freely attached and detached, so that the predetermined local area under the air supply hood and the intake hood can be brightened. It is an object to provide an air supply / exhaust device.

[0005]

In order to achieve the object, the present invention comprises the following problem solving means.

(1) Invention of Claim 1 In the air supply / exhaust device of the present invention, the air from the air supply duct 7 is
The air in the predetermined local region surrounded by the air curtain flow is blown from the air outlet 4 opened in the circumferential direction through the air supply hood 1 to the outer periphery of the predetermined local region as an air curtain flow. In the air supply / exhaust device configured to suck and exhaust air toward the intake duct 8 opened in the intake hood 2 via the intake hood 2 below the air outlet 4, the intake hood 1 and the intake air Hood 2
The illumination device 40 that illuminates a predetermined local area below is detachably installed using the outer peripheral wall of the air supply hood 1.

Therefore, in this structure, even if a shadow portion is formed in a predetermined local area below the air supply hood 1 and the intake hood 2, it becomes possible to illuminate brightly by the illumination device 41, and the conventional problem is surely solved. Will be resolved.

(2) Invention of Claim 2 In the air supply / exhaust device of the present invention, in the configuration of the invention of claim 1, the lighting device 40 includes a light source section 41 and the light source section 41.
Is provided below the air supply hood 1 and the intake hood 2 to support the arm 42 of a predetermined length, and the outer peripheral wall of the air supply hood 1. It is characterized by comprising arm mounting brackets 45, 45 that are supported and fixed to the outer peripheral wall.

Therefore, in this structure, the light source section 41 having a light bulb or the like faces the lower predetermined local area of the air supply hood 1 and the intake hood 2 via the arm section 42 and the arm section mounting brackets 45, 45. , Is installed detachably.

(3) Invention of Claim 3 In the air supply / exhaust device of this invention, in the structure of the invention of Claim 2 above, the lower parts of the arm portion mounting brackets 45, 45 are:
It is characterized in that it is detachably fixed to the outer peripheral wall of the air supply hood 1 via the pop nuts 46, 46.

Therefore, in this structure, the lighting device 40 is installed in the air supply hood 1 by screwing the arm portion mounting brackets 45, 45 on the arm portion 42 side to the pop nuts 46, 46 via the screws 47. It is detachably attached to the outer peripheral wall.

(4) Invention of Claim 4 In the air supply / exhaust device of this invention, in the constitution of the invention of Claim 2 or 3, the arm portion 42 is detachably attached to the upper part of the arm portion mounting brackets 45, 45. It is characterized in that arm fitting portions 45a, 45a having a C-shaped cross section for fitting are provided.

Therefore, in this structure, the arm fitting portions 45a. , 45a, the lighting device 40 is detachably attached to the outer peripheral wall of the air supply hood 1.

(5) Invention of Claim 5 The air supply / exhaust device according to the present invention comprises the above-mentioned Claim 1, 2, 3 or
In the structure of the invention of FIG.
It is characterized by consisting of b.

Therefore, in this structure, the inside of the arm portion 42 formed of the hollow pipe 42b can be used as a wiring sleeve for the power cord 43, so that the power cord can be protected and the appearance can be improved. Become.

[0016]

As a result of the above, according to the air supply / exhaust device of the present invention, the lighting device can appropriately illuminate the ventilation target area below the air supply hood and the intake hood.
Since the lighting device is detachable, the maintainability at the time of maintenance work such as cleaning accompanied by separation of the air supply hood and the intake hood is improved.

[0017]

1 to 4 show the construction and operation of a tornado type local ventilation system constructed by adopting an air supply / exhaust system according to an embodiment of the present invention.

First, FIG. 1 shows the overall construction of the apparatus. In FIG. 1, reference numeral 1 is a substantially frustoconical air supply chamber whose diameter gradually increases from the upper side to the lower side, An air supply swirl space 1a having the same shape is formed inside thereof. Below the lower opening of the air supply chamber 1, an offset is arranged at a predetermined distance on the lower side, and the opening diameter gradually decreases from the lower side to the upper side, and the top plate 2a has a flat shape. A dome-shaped intake hood 2 which is a surface is provided. The intake hood 2
Has a lower side air collection opening 2b on the lower side (floor side)
The flat top plate portion 2a on the upper side thereof faces the lower side opening surface of the air supply chamber 1 in substantially the same area so as to face a predetermined local region (for example, a customer seat table of a yakiniku restaurant). Is provided.

As a result, the horizontal plate 3 on the lower opening surface side of the air supply chamber 1 which functions as a partition plate and the top plate portion 2a of the lower side intake hood 2 thereof are installed. While effectively swirling the outside air introduced through an air supply duct 7 described later between the blowout air guide plate 5 having a wind direction guide edge 5a having a diameter slightly larger than that of the plate portion 2a, it moves outward in the horizontal direction. A supply air outlet 4 having an air outlet passage extending in the radial direction for blowing out is formed on the side of the ventilation device main body (supply / exhaust device main body) and is formed in an annular shape so as to be continuous in the entire circumferential direction. ing.

Further, in the air supply swirl space 1a in the air supply chamber 1, it is located on the upper side of the intake hood 2 and is accompanied by a component in the predetermined swirling direction via the air supply duct 7. The airflow control means having a flow velocity control structure for making the flow velocity distribution of the introduced air flow uniform is provided. The air flow control means is provided at the center of the air supply swirl space 1a, to which the outside air is supplied from the air supply duct 7, and the central portion of the horizontal plate 3 which spreads outward in the radial direction on the air outlet 4 side. Rectifying pipe 9 having a diameter larger than that of the intake duct 8 and a rectifying plate portion (punching hole portion) having a large number of rectifying holes of the horizontal plate 3 formed corresponding to the lower end side opening surface of the rectifying pipe 9. Three
and a.

The rectifying pipe 9 is arranged around the outer periphery of the intake duct 8 and has an inner diameter dimension large enough to maintain a predetermined distance from the intake duct 8. Further, the upper end side opening 9a maintains a predetermined distance from the peripheral wall portion of the air supply chamber 1, and the lower end side opening edge is supported on the horizontal plate 3, and the upper side air supply swirl space is provided. 1a and the lower side air blowing passage are communicated with each other, and the swirling airflow on the side of the air supply swirling space 1a is finally passed through the straightening holes of the straightening plate portion 3a while reducing the passage diameter. While uniformizing the flow velocity distribution, an annular rectifying passage is formed to flow to the upstream side of the air outlet passage of the air outlet 4 which is further annularly opened in the radial direction.

Further, the air supply duct connection port 1b at the upper part of the air supply chamber 1 is provided with an outside air introduction portion for predicting the air supply supplied from the outside on the upstream side in the swirling direction. The downstream end 7a of the duct 7 is connected in a communicating state. In addition, the intake hood 2 extends from the upstream end 80a side of the exhaust duct 80 toward the lower intake flow upstream direction, and has the intake duct connection port 1b of the intake chamber 1, the intake air swirling space 1a, the rectifying pipe 9, The horizontal flat plate 3, the blown-air guide plate 5, and the intake hood 2 are vertically penetrated and introduced, and the lower end side intake port 8a is located at the upper part inside the opening 2b for collecting air of the intake hood 2. The air intake ducts 8 extending (projecting) in a cylindrical shape are connected in a communicating state. Then, the upper side downstream portion 8b of the intake duct 8
Is connected to the upstream end 80a of the exhaust duct 80.

On the other hand, the outside air intake end of the air supply duct 7 and the inside air discharge end of the exhaust duct 80 are respectively extended outside the door. And these air supply duct 7 and exhaust duct 80
An outside air blowing fan (sirocco fan), for example, an intake air fan (intake / exhaust fan) is provided at the end of the outdoor extension of not shown in the figure. The exhaust action is realized.

The intake hood 2 and the horizontal plate 5 are fixed to the intake duct 8 side through a predetermined flange member fitted and fixed to the intake duct 8 side.
Reference numeral 33 indicates a mounting and fixing nut in the flange portion.

By the way, as described above, the intake port 8a on the lower end side of the intake duct 8 has the air collecting opening 2 of the intake hood 2.
The inside air collected in the air collection opening 2b of the intake hood 2 is opened at the upper part of the inside of b, and is exhausted to the outside. The intake port 8a includes, for example, the intake port 8a and the intake port 8a. The oil recovery device 10 having a separate structure is detachably provided,
The oil mist component in the exhaust air is effectively recovered as described below.

That is, in the main body case of the oil recovery apparatus 10, as shown in the drawing, the upper first case 10A and the lower second case 10B are detachably coupled to each other, and the inner middle portions thereof are connected. A baffle case 15 having a bypass forming function and an oil filter supporting function is interposed between the two.

The first case 10A has a cylindrical connecting port portion 11a of substantially the same diameter which is fitted and connected to the intake port 8a of the intake duct 8 on the upper end side thereof, and the first connecting case portion 11a on the other lower end side thereof. The large-diameter connecting port 11b that fits into the large-diameter connecting port 14a on the upper end side with the 2 case 10B, and the large-diameter connecting port 11b between them is located at the upper portion of the large-diameter connecting port 11b. Oil filter fitting portion 11 having a diameter slightly smaller than the connecting port portion 11b of
c are provided respectively.

The second case 10B has a large-diameter connecting port 14a on the upper end side thereof, which is fitted into the large-diameter connecting port 11b of the first case 10A, and the connecting port. A cross section having a predetermined depth, which is located below the portion 14a, extends downward from the connection opening portion 14a by a predetermined length while gradually reducing the diameter, and is provided on the inner peripheral side of the lower end side intake opening 10C. It is configured to have a U-shaped oil receiving groove 14b. A plurality of stud sleeves 17, 17 ... Standing from the oil receiving groove 14b and extending upward by a predetermined height at a predetermined interval in the circumferential direction, are provided upright. The baffle case 15 described above is supported at predetermined intervals in the vertical direction via 17 ..., and is moved in the vertical direction by the stud bolts 18, 18 ... Inserted in the stud sleeves 17, 17. Is fixedly connected to and supported by.

The baffle case 15 has a shallow cross-sectional chevron shape, an oil filter support portion 15a having a flat surface with a predetermined radius on the upper surface of the central portion, and a predetermined interval on the outer edge portion on the lower end side. The stud sleeve 17,
Attachment edge portions 15b, 15b ... Corresponding to 17 ...

The flat surface 1 of the baffle case 15
5a located above the oil filter fitting portion 11c of the first case 10A.
2 is stably supported in a substantially horizontal state. The oil filter 12 includes a filter member 13 made of, for example, a metal mesh material laminated and polymerized inside, and the filter member 1
The filter cases 12a and 12b have a grill structure in which 3 is fitted into each other from above and below and the cover is integrated.

With the above configuration, the air F ₂ containing oil smoke in the intake hood 2 sucked from the intake opening 10C of the second case 10B collides with the back side of the baffle case 15 as shown in the figure. After that, the oil flows to the outer side in the radial direction, and then flows to the oil filter 12 having a sufficiently large area through the passage between the outer peripheral edge of the baffle case 15 and the second case 10B and the first case 10A. After being supplied, the oil mist component in the air is removed, and thereafter, the oil mist component is supplied into the intake duct 8.

The detachable engagement of the second case 10B with the first case 10A of the oil recovery device 10 configured as described above is performed by, for example, first inserting the hook-shaped helicoid groove 22 on the side of the second case 10B into the first case 10A. Projection pin 2 on the case 10A side
4, the engaging structure for relatively rotating the helicoid and the detachable engagement of the oil recovery device 10 with respect to the intake port 8a of the intake duct 8 are, for example, a hook-shaped helicoid groove on the first case 10A side. An engaging structure in which 21 is rotated relative to a projecting pin 23 on the outer circumference of the intake duct 8 side to engage in a helicoid is adopted at at least two locations facing each other in the diametrical direction.

In the figure, reference numerals 16, 16 ... Indicate an auxiliary intake port for sucking the oil smoke collected in the intake hood 2 provided below the baffle case 15 on the second case 10B side. Is.

On the other hand, the air outlet 4 is located between the horizontal plate 3 on the lower end portion side of the air supply chamber 1 and the flat blown air guide plate 5 on the intake hood 2 in the radial direction as described above. The air passage has a predetermined passage length outwardly, is continuously opened in an annular shape in the entire circumferential direction, and forms a horizontal air blowing passage. Then, in the downstream portion of the air blowing passage in the same horizontal direction, a large number of swirling flow generating stators (swirl flow generating means) 6, 6 ... Having a predetermined inclination angle (radial angle) downward in the spiral direction, respectively. However, as shown in the figure, they are arranged side by side at a predetermined interval in the entire circumferential direction.

Therefore, in this structure, the blowout airflow blown out from the air supply swirl space 1a through the airflow rectifying passage 9a in the airflow rectifying tube 9 to the air outlet 4 horizontally opened radially outward is By passing through the air outlet 4 having the horizontal air outlet passage, a swirling force is further imparted by the action of the swirling flow generating stators 6, 6 ...
It is possible to generate a substantially horizontal swirling airflow F ₁ having a uniform airflow distribution and no turbulence, while being swirled in the horizontal direction without decelerating the wind speed of the blowing airflow and being blown out more strongly and stably. .

On the other hand, correspondingly, on the inner side in the central axis direction, toward the intake port 8a opened in the air collection opening 2b of the intake hood 2 of the intake duct 8 in the opposite direction to the above direction. Due to the suction force of the intake fan, a tornado-like stable swirling intake flow F ₂ that rises from below to above is formed.

In that case, the room air flowing in the direction of the intake duct 8 through the air collecting opening 2b of the intake hood 2 as described above is as described above in the air collecting opening 2b of the intake hood 2. In addition, the oil mist component in the oil smoke is surely and effectively provided by the oil recovery device 10 that is separate from the intake port 8a of the intake duct 8 that forms an effective bypass passage and that includes the oil filter 12 having a sufficiently large area. Will be recovered and removed. Therefore, the intake duct 8 and the exhaust duct 8
The inside of 0 will not be clogged with the oil mist component, and its maintenance will be easy.

By the way, the tornado type local ventilation device configured as described above is installed in various places where ventilation is required, such as on a customer table of a yakiniku restaurant. Both the air supply hood 1 and the intake hood 2 are installed. Due to their size, there is the problem that they block the light from the illumination source and darken the ventilation area, such as at night. This phenomenon is particularly noticeable when the illumination source is located directly above the device.

Therefore, in the tornado type local ventilation device of the present embodiment, as shown in the figure, the outer peripheral wall of the air supply hood 1 is utilized to ventilate the air below the air supply hood 1 and the intake hood 2. An illumination device 40 capable of brightly illuminating the target area is installed so that it can be freely attached and detached.

This lighting device 40 is located below the outer peripheral edge of the lower intake hood 2 by a predetermined dimension, and faces a ventilation target area on the lower floor surface thereof, and the light source 41. And an electric power cord 43 for supplying electric power from the ventilation device main body side to the electric light bulb socket 41b of the light source unit 41. ing.

First, the light source unit 41 has a light bulb cover (main body) 41a having a different diameter cylindrical structure as shown in the drawing, which has a reflecting surface and a cylindrical light converging port on the front side, and the inside of the light bulb cover 41a. Socket part 41 for mounting a light bulb provided on the rear part
b and a light bulb 41c attached to the socket portion 41b by screwing or other means.
Is connected to the socket portion 41b from the rear end side of the light bulb cover 41a.

On the other hand, the arm portion 42 is, for example, as shown in FIG.
As shown in FIG. 3, it is composed of a hollow pipe (for example, SUS hollow pipe) 42b that is as light and highly rigid as possible, and the two proximal ends of the hollow pipe 42b are the above-mentioned air supply hood 1 An oblique direction along the outer peripheral wall surface of the air supply hood 1 via the arm portion mounting brackets 45, 45 of the stay body structure, which are located at the upper and lower ends of the outer peripheral wall portion and have arm fitting portions 45a having a C-shaped cross section. It extends downward and is detachably attached.

That is, the arm portion mounting bracket 4
Reference numerals 5 and 45 are a flat base piece 45c detachably fastened and fixed to the outer peripheral wall surface of the air supply hood 1 via a pop nut 46, which will be described later, and upwardly directed substantially at right angles from one side portion of the base piece 45c. Stay part 4 which is bent and raised to a predetermined height
5b, and an arm fitting portion 45a having a C-shaped cross section is integrally provided on the upper end of the stay portion 45b.
The arm fitting portion 45a is elastically deformable with a sufficient elastic coefficient, and by forcefully fitting the hollow pipe 42b through the side opening 48,
It is fitted and fixed with a sufficient fitting force, and can be removed by removing it in the opposite direction.

On the other hand, the pop nut fitting hole 1 as shown in FIGS. 2 to 4 is formed on the outer peripheral wall of the air supply hood 1 on which the arm mounting brackets 45, 45 are mounted.
d and 1d are provided. Then, as shown in detail in FIG. 4, with respect to the pop nut fitting holes 1d, 1d, a seat portion 46a, a main body portion 46b, a fitting groove 46c with the edge of the fitting hole 1d of the outer peripheral wall, and a screw screw 47. As shown in FIGS. 2 and 3, the base pieces 45 of the arm mounting brackets 45, 45 are provided for the pop nuts 46, 46 each having the screwing holes 46d.
The c and 45c are fixed with screws.

As a result, the detachable fixed state of the hollow pipe 42b as shown in FIGS. 2 and 3 is realized.

On the other hand, a Y-shaped light bulb cover connecting bracket 42C is provided on the tip side of the hollow pipe 42b, and the light bulb cover 41a is provided via the light bulb cover connecting bracket 42C and the left and right hinge shafts 44, 44.
Are connected so as to be relatively rotatable in the arrow direction.

Therefore, by this rotation, as shown in the figure, the irradiation angle θ of the light bulb 41c of the light source unit 41 can be arbitrarily adjusted.

The light bulb cover connecting bracket 42
At the base position of C, the power cord lead-out portion 42 of the bush structure is provided.
a is provided, the power cord 43 is pulled out from the power cord pulling-out portion 42a, and
It is introduced and connected to the socket 41b from the rear end of a.

As described above, the air supply / exhaust device of the present invention is
The air from the air supply duct 7 is blown from the air outlet 4 opened in the circumferential direction through the air supply hood 1 to the outer periphery of the predetermined local area as an air curtain flow, and is surrounded by the air curtain flow. An air supply / exhaust device configured to suck and exhaust air in a predetermined local area toward the intake duct 8 opened in the intake hood 2 through the intake hood 2 below the air outlet 4. In the above, the lighting device 40 for illuminating a predetermined local region below the air supply hood 1 and the intake hood 2 is detachably installed using the outer peripheral wall of the air supply hood 1.

Therefore, in this configuration, even if a shadow is formed in a predetermined local area below the air supply hood 1 and the intake hood 2, the illumination device 41 can illuminate brightly, and the conventional problem is surely solved. Will be resolved.

Further, in the air supply / exhaust device of the present invention, the lighting device 40 has a predetermined length for supporting the light source section 41 and the light source section 41 positioned below the air supply hood 1 and the intake hood 2. An arm portion 42 and an arm portion mounting bracket 4 provided on the outer peripheral wall of the air supply hood 1 for supporting and fixing the arm portion 42 to the outer peripheral wall of the air supply hood 1.
It is characterized by consisting of 5,45.

Therefore, in this structure, the light source portion 41 having a light bulb or the like faces the predetermined local region below the air supply hood 1 and the intake hood 2 via the arm portion 42 and the arm portion mounting brackets 45, 45. , Is installed detachably.

Further, in the air supply / exhaust device of the present invention, the lower portions of the arm portion mounting brackets 45, 45 are connected to the outer peripheral wall of the air supply hood 1 via the pop nuts 46, 46.
It is characterized by being detachably fixed.

Therefore, in this structure, the lighting device 40 is installed in the air supply hood 1 by screwing the arm part mounting brackets 45, 45 to the pop nuts 46, 46 via the screws 47. It is detachably attached to the outer peripheral wall.

Further, in the air supply / exhaust device of the present invention, the arm portion 4 is provided above the arm portion mounting brackets 45, 45.
The arm fitting portion 45 having a C-shaped cross section for detachably fitting the 2
a and 45a are provided.

Therefore, in this structure, the arm fitting portions 45a. , 45a, the lighting device 40 is detachably attached to the outer peripheral wall of the air supply hood 1.

Further, the air supply / exhaust device of the present invention is characterized in that the arm portion 42 is formed of a hollow pipe 42b.

Therefore, in this structure, the inside of the arm portion 42 formed of the hollow pipe 42b can be used as a wiring sleeve for the power cord 43, so that the power cord can be protected and the appearance can be improved. Become.

As a result, according to the air supply / exhaust device of the present invention, the lighting device can appropriately illuminate the ventilation target area below the air supply hood and the intake hood, and the lighting device can be attached / detached. Therefore, the maintainability at the time of maintenance work such as cleaning accompanied by separation of the air supply hood and the intake hood is improved.

(Modification) In FIG. 5, the arm mounting brackets 45, 45 having the above-described structure are formed by a metal plate member having relatively rigidity, and the above-mentioned arm fitting portion has an arm having a C-shaped cross section. The present invention relates to a modified example of a binding structure in which ring-shaped binding pieces 50, 50 and screw screws 51, 51 are used instead of the fitting portions 45a, 45a.

The ring-shaped binding pieces 50, 5
Insertion holes for screw screws 51, 51 are provided in the corresponding surface portions in the binding state of the tips 50a, 50a of No. 0 and the stay portions 45b, 45b, and after fitting the hollow pipe 42b of the arm portion 42, as shown in the figure. Nuts 52,5
The arm portion 42 is fixed by screwing and fastening via 2.

With this structure as well, the arm portion 42
The hollow pipe 42b is detachably fixed in a stable state.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an overall configuration of a tornado type local ventilation device configured by an air supply / exhaust device according to an embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view showing the configuration of the main part of the device (FIG. 3B).
-B).

FIG. 3 is an enlarged cross-sectional view showing the configuration of the main part of the same device (FIG. 2A).
-A).

FIG. 4 is a partially cutaway enlarged perspective view showing a configuration of a main part of the apparatus.

FIG. 5 is a sectional view similar to FIG. 3, showing a modified example of the arm portion mounting bracket of the device.

[Explanation of symbols]

1 is an air supply chamber, 1a is an air supply swirl space, 2 is an intake hood, 2b is an air collecting opening, 3 is a horizontal plate, 4 is an air outlet, 5 is an air guide plate, 6 is a swirling flow generating stator,
7 is an air supply duct, 8 is an intake duct, 80 is an exhaust duct,
10 is an oil recovery device, 40 is a lighting device, 41 is a light source unit, 4
1c is a light bulb, 42 is an arm part, 43 is a power cord, 44
Is a hinge shaft, and 45 is an arm portion mounting bracket.

Claims (5)

[Claims] 1. Air from an air supply duct (7) is blown out from an air outlet (4) opened in the circumferential direction as an air curtain flow to the outer periphery of a predetermined local area through an air supply hood (1). On the other hand, the air in the predetermined local area surrounded by the air curtain flow is opened into the intake hood (2) through the intake hood (2) below the air outlet (4). In an air supply / exhaust device configured to suck and exhaust air in the direction of an intake duct (8), an illumination device (40) that illuminates a predetermined local area below the air supply hood (1) and the intake hood (2) is provided with the air supply device. An air supply / exhaust device characterized by being installed detachably using the outer peripheral wall of the air hood (1). 2. The lighting device (40) comprises a light source section (41).
An arm portion (42) of a predetermined length for supporting the light source section (41) below the air supply hood (1) and the intake air hood (2), and the outer periphery of the air supply hood (1). The arm portion mounting brackets (45), (45) provided on a wall for supporting and fixing the arm portion (42) to the outer peripheral wall of the air supply hood (1). Air supply / exhaust device described. 3. Arm mounting brackets (45), (4)
3. The air supply / exhaust system according to claim 2, wherein the lower part of 5) is detachably fixed to the outer peripheral wall of the air supply hood (1) via pop nuts (46), (46). apparatus. 4. Arm mounting brackets (45), (4)
5. An arm fitting portion (45a), (45a) having a C-shaped cross section for detachably fitting the arm portion (42) is provided on the upper part of 5). Air supply / exhaust device described. 5. The arm pipe (42) has a hollow pipe (42).
5. The method according to claim 1, 2, 3 or 4 characterized in that
Air supply / exhaust device described.