JPH0828917A - Hood apparatus - Google Patents

Abstract

PURPOSE:To provide a hood apparatus capable of reduction of rain water entering and hood apparatus and pressure drop of an air stream and of being made compact. CONSTITUTION:A baffleplate 24 is provided which blocks the substantially half of an opening area of a through-hole located in the back surface of a hood 11, and a folded part 26 faces the internal wall surface of the hood which is formed by folding the tip end side of the baffleplate 24 into an L shape. An absorption member 31 is provided in the vicinity of the internal wall surface to absorb water. Further, an opening 21 is set to be larger and an air passage 30 in the hood is provided in a zigzag manner and a cross section is made uniform.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hood device installed on a wall of a building or the like through a ventilation opening, and more particularly to a hood device for preventing rainwater from entering.

[0002]

[Prior art]

Conventional example 1. Conventionally, as means for preventing rainwater from entering the inside of the hood and the inside of the duct, as shown in FIGS.
There is a hood as shown in Fig. 5 (Actual Kaihei 4-1.
03537, Jitsukai Sho 59-152322, etc.).
That is, the hood 1 provided on the wall surface covers the ventilation port 2, the plate 3 is provided below the ventilation port 2, and the lower end surface 4 of the hood 1 is provided.
Is provided so as to extend closer to the wall than below the plate 3 to make the opening 5 smaller so that rainwater can be prevented from entering the plate 3. In particular, in the case of FIG. 14, the inclination angle of the plate 3 is set to an acute angle to narrow the air passage 6 (indicated by an arrow) so that rainwater or the like can be more reliably infiltrated.

Conventional example 2. Further, a structure for reducing the noise of the exhaust sound of the ventilation fan is also known (FIG. 16: Japanese Utility Model Laid-Open No. 64-5032). That is, hood 1
Covers the vent 2 and provides plates 3 and 3 in the air passage so that the air passage is bent in the hood 1 and the sound absorbing member 7 is provided in the hood 1 to enhance the soundproof effect to the inside of the room. I am trying.

[0004]

In the conventional example 1,
It is possible to further reduce the infiltration of water into the indoor side as compared with the case where the plate 3 is not applied, but the gap between the plate 3 and the lower end surface 4 is narrow,
Moreover, since there is nothing to prevent the airflow from entering the wider vent 2, the airflow quickly passes between the plate 3 and the lower end surface 4, and rainwater is also carried at the same time, so that the rainwater is transported indoors. There was a problem that infiltration still occurred. Further, since the air passage 6 formed by the plate 3 together with the lower end surface 4 is narrow, and immediately after passing through this narrow space, the air passage 6 is communicated with the ventilation port 2 that is nearly three times wider, the pressure loss of the air flow becomes relatively large, and the blower is blown. There was a problem of imposing an extra load on. Especially in the case of FIG. 14, since the plate 3 is steeply inclined,
The pressure loss was likely to appear remarkably.

Further, in the conventional example 2, the structure for exhaust is shown, but even if this is used for air supply, the air passage 6
However, there is a problem that the pressure loss of air is large and the hood becomes bulky because the bending is longer than that of the conventional example 1.

The present invention has been made in order to solve such a conventional problem, and it is possible to minimize the increase of the load of the blower due to the pressure loss of the air flow and to further reduce the intrusion of rainwater, thereby making a compact hood. The purpose is to provide a device.

[0007]

To this end, in the present invention,
A hood that is formed on the wall surface and covers the front side of a communication opening that communicates with the inside of the room and that has an opening that communicates with the communication opening below the hood, and defines the opening that is arranged on the lower surface side and the front side of the hood. A guide plate that guides an air flow to the opening; and a baffle plate that is disposed on the lower side of the front surface of the through port and has its upper end side bent or curved to direct the inner wall of the hood. To do.

Further, the edge of the guide plate defining the opening is located below the tip of the baffle plate, and the baffle plate is configured to cover almost half the area of the passage. is there.

Further, the present invention is characterized in that the end edge of the guide plate defining the opening is arranged substantially at the center of the lower end surface of the hood.

Further, the present invention is characterized in that an absorbing member for absorbing water is provided in the vicinity of the inner wall surface of the hood, which is directed toward the tip side above the baffle plate.

Further, at least one of the baffle plate and the guide plate has an absorbing member for absorbing water.

Further, the invention is characterized in that at least one of the baffle plate and the guide plate has a vent hole for allowing air to pass therethrough.

Further, an absorbing member having a large number of small holes and capable of adhering moisture is provided on the inner wall surface of the hood, and a gap is formed between the absorbing member and the inner wall surface of the hood to allow passage of air flow. Is formed.

[0014]

In the present invention, since the baffle in the hood partially covers the front surface of the passage, it is easier to prevent rainwater from entering the passage, and the passage becomes smaller. On the other hand, it is not necessary to enlarge the hood, and the hood device becomes more compact. Further, since the baffle plate covers the front surface of the passage, it is possible to make the dimension of the opening and the dimension of the passage closer to each other, and it is possible to reduce the distance between the baffle plate and the guide plate as in the conventional hood device. Without increasing the pressure loss of the air flow.

Further, since the end edge of the guide plate defining the opening is located below the tip of the baffle plate and the baffle plate covers almost half the area of the passage, the tip of the baffle plate and the guide are formed. The air passage formed by the edge of the plate tends to become larger, and the baffle plate sufficiently prevents the intrusion of rainwater while making the cross-sectional area of the air passage in the hood more uniform and further reducing the pressure loss of the air flow. Let

Further, since the edge of the guide plate that defines the opening is located substantially at the center of the lower surface of the hood, the opening is made larger to facilitate the inflow of air flow, and the cross-sectional area of the air passage in the hood is increased. Are more equalized, resulting in less pressure loss in the air flow.

Further, in the case where an absorbing member for absorbing moisture is provided in the vicinity of the inner wall surface of the hood, which is directed toward the tip end side above the baffle plate, the air flow guided to the baffle plate easily hits the absorbing member, and the moisture content is increased. Is filtered to supply a stream of air with less moisture to the indoor side and further reduce the infiltration of rainwater into the indoor side.

Further, in the case where at least one of the baffle plate and the guide plate has an absorbing member that absorbs moisture, the moisture is wiped off by these absorbing members when the air flow passes through the air passage in the hood. An air stream with a low water content is supplied to the indoor side, so that the infiltration of rainwater into the indoor side is further reduced.

Further, in the case where at least one of the baffle plate and the guide plate has a ventilation hole for allowing air to pass therethrough, a part of the air that has been moisture-removed by the absorbing member passes directly through this ventilation hole to the inside of the room. Due to being sucked in, the infiltration of rainwater into the interior is further reduced and at the same time the pressure loss of the air is further reduced.

Further, an absorbing member having a large number of small holes and capable of adhering moisture is provided on the inner wall surface of the hood, and a gap is formed between the absorbing member and the inner wall surface of the hood to allow passage of air flow. In the case where the air flow hits the small holes, turbulent flow is generated and moisture easily adheres to the absorbing member, and a large number of small holes prevent water from concentrating in the absorbing member to form large water droplets. , Prevents moisture from being carried by the air flow to the indoor side.

[0021]

Embodiments of the present invention will be described below with reference to the drawings, but the same reference numerals in each embodiment represent the same or corresponding members. Example 1. FIG. 1 is a cross-sectional view of a hood device installed at a position close to a floor surface G such as a balcony of a house. Reference numeral 11 is a hood that is installed outside to introduce outside air and has an outer surface protruding in an arc shape. The connecting portion 12 is connected to a duct 14 which is inserted into a vent hole 13 formed in the wall. Duct 1
Reference numeral 3 is connected to an air conditioner 15 having a built-in blower installed in the room. On the wall surface side of the hood 11, a flange 16 provided with a screw hole for mounting the hood is integrally provided around the hood 11.

Reference numeral 16 denotes a supporting member formed by bending a sheet metal provided on the front side of the lower end surface 17 of the hood 11. The lower surface side thereof absorbs moisture as shown in FIG. 9 and allows air to pass therethrough. An absorbing member 18 made of non-woven fabric or the like is attached, and the supporting member 16 and the absorbing member 18 form a guide plate 19. An edge 20 on the rear side (wall side) of the guide plate 19 defines an opening 21 for guiding an air flow with the rear side wall surface of the hood,
Further, in this embodiment, the guide plate 19 is the lower end surface 1 of the hood 11.
It occupies almost half of the area of 7, and extends to almost the center of the lower end surface 17 so that the other half becomes an opening. That is, it is extended to the position indicated by point A in FIG. The support member 16 may be attached to the inner wall of the hood 11 by a general method such as welding or screw fastening, and the absorption member 18 may be attached to the support member 16 by a known method such as pinning or adhesion. The method may be used, but screwing is used in this embodiment.

Reference numeral 22 denotes a support member formed by bending a sheet metal having an absorbent member 23 made of a non-woven fabric or the like attached thereto, similar to the absorbent member 18 that absorbs moisture and allows air to pass through. The absorbing member 23 constitutes a baffle plate 24. The baffle plate 24 is the rear end and the lower end surface 1 of the hood 11.
7 rising vertically from the rising portion 25 to the bending portion 26
Is bent at a substantially right angle toward the inner wall surface of the hood 11. Therefore, between the contour of the baffle plate 24 and the inner wall of the hood 11, as shown by the arrow in FIG.
Is formed. The rising portion 25 extends to the position shown by the point B in FIG. 1, that is, to the center of the height of the hood 11, and the bent portion 26 extends to almost the center of the lower end surface 17 of the hood 11 in the extending direction of the hood. Existence Therefore, baffle plate 2
The front end 27 of the No. 4 and the end edge 20 of the guide plate 19 are located on the perpendicular line L. That is, the edge 20 of the guide plate 19 is located below the tip 27 of the baffle plate 24,
It is located just below the baffle plate 24. In addition, the edge 20
Is preferably provided in a range that does not exceed the line L (FIG. 1) vertically lowered from the tip 27 of the baffle plate 24 because the pressure loss of air is small. Although the baffle plate 24 is L-shaped in this embodiment, it may be curved toward the hood 11 side.

Reference numeral 29 denotes a through hole which is provided on the back surface of the hood 11 and communicates with the deadlock 14. In this embodiment, the opening area itself is larger than the duct 14, but the baffle plate 24 is provided. Almost half of the opening area is blocked by. Therefore, the actual opening area of the passage 29 is almost half that of the duct 14.

Reference numeral 31 is an absorbing member made of a non-woven fabric or the like that absorbs moisture and allows air to pass through, and is attached to the inner wall surface of the hood 11 with an adhesive. The absorbing member 31 is provided in the vicinity of the inner wall surface of the hood 11 which is directed toward the tip end 27 side above the baffle plate 24. More specifically, the tip end 27 is provided.
Is arranged slightly downstream of the air flow from the position of the inner wall surface of the hood 11 to which is directed. However, the absorbent member 31 is the hood 1.
1 may be attached to the entire inner wall surface, but at least the baffle 2
In the vicinity of the inner wall surface of the hood to which the upper tip 27 of 4 is directed, the air flow guided by the baffle plate 24 is likely to hit, so that it may be in this portion. The absorbent member 31 may be made of the same material as that of the absorbent members 18 and 23. However, it is preferable to use a material having a property of naturally dripping from the absorbent member even when absorbing water.

In this embodiment, as shown in FIG. 3, the support member 16 and the support member 22 are bent at one end of the support member so as to surround the absorbent members 18 and 23. A screw 28 is attached to one side of the bent end from the side surface of the hood 11, and the screw 28 fixes both the supporting member and the absorbing member to the side surface of the hood 11. In addition, 32 is an exhaust hood for an exhaust path arranged in parallel with the hood 11. The exhaust hood 32 is slightly closed inside, and a rain baffle 34 located below the front surface of the exhaust port 33 is provided to the exhaust port 33. It prevents the intrusion of rainwater.

Next, the operation of the hood device according to this embodiment in the case of rain will be described. The blower in the air conditioner 15 guides the outside air into the room and discharges the room air to the outside (arrow in FIG. 2), but in particular, the moisture-containing air guided to the hood 11 enters the opening 21 and winds. Meander the road 30
9 and is supplied to the room through the duct 14.
In addition to the airflow that directly enters the opening 21, the airflow that enters the opening includes the airflow that enters along the lower surface of the guide plate 19, and the latter airflow is the absorbing member at this time. Since the water is absorbed by 18, the air becomes a dryr air flow and enters the opening 21.

The airflow entering the opening 21 then further enters the air passage 30 along the inner wall surface of the baffle plate 24,
At this time, the air flow becomes a drier air flow because the absorbing member 23 absorbs moisture. Further, since the air flow sucked along the baffle plate 24 is sucked along the absorbing member 31 on the inner wall surface of the hood 11 to which the tip of the baffle plate 24 is directed, the absorbing member also absorbs moisture. It is absorbed and the air flow itself becomes drier.

Therefore, the air flow that has entered into the duct 14 passes through the moisture to each of the absorbing members 18, 23, 31 and is more dry, so that water droplets due to rainwater can enter the duct 14 or the indoor side. Can be well prevented. Further, since the baffle plate 24 closes almost half of the lower side of the through hole 29 of the hood 11, it is possible to sufficiently prevent rainwater from directly entering the duct 14 due to strong wind.

Further, according to this embodiment, the cross-sectional area of the air passage 30 formed by the contour of the baffle plate 24 and the inner wall surface of the hood 11 does not change much as compared with the conventional one, and therefore the pressure of the air flow is reduced. The loss is smaller, the airflow entering through the opening 21 becomes slower than the conventional one, and it becomes difficult to carry the water droplets to the indoor side. Further, since the baffle plate 24 in the hood 11 partially covers the front surface of the passage hole 29, the height dimension of the hood covering the baffle plate 24 can be made smaller than that of the conventional one, so Also, the hood 11 does not need to be large, and it is more compact, and can be installed in a special place such as being able to be installed at a position close to the floor surface G such as a balcony.

Further, the end edge 20 of the guide plate 19 defining the opening 21 is provided in a range not exceeding the line L vertically lowered from the tip 27 of the baffle plate 24, and the baffle plate 24 is approximately half of the through hole 29. Since it is configured to cover the area of the hood 1, the opening 21 is made large and the baffle plate 24 prevents the intrusion of rainwater.
It becomes possible to make the cross-sectional area of the air passage in 1 more uniform and further reduce the pressure loss of the air flow.

Further, since the end edge 20 of the guide plate 19 defining the opening 21 is located substantially at the center of the lower end surface 17 of the hood 11, the opening 21 is enlarged to facilitate the inflow of the air flow, and the hood 11 The cross-sectional area of the internal air passage 30 can be made more uniform, and the pressure loss of the air flow can be made smaller.

The test results for the pressure loss of the air flow in this example will be described below. In the test, based on quality engineering, as a control factor related to the pressure, the position of the height of the baffle plate 24 with respect to the height of the hood 11 (control factor 1), the bending portion 26 relative to the rising portion 25, and the like. Comparing the angle between horizontal and obtuse angles (control factor 2), baffle plate 24
How much the positional relationship between the tip 27 of the guide and the edge 20 of the guide plate 19 with respect to the line L intersects (+) or discrepancy (-) (control factor 3) is picked up (Table 1), and the pressure loss is low. Analyzed things. As a result, among the combinations of control factors, the results arranged in the order of lowest pressure loss are shown in Table 2.

[0034]

[Table 1]

[0035]

[Table 2]

As is clear from Table 2, the height of the baffle plate 24 is substantially at the center of the height of the hood 11, and the angle of the bent portion 26 with respect to the rising portion 25 is 0 ° (parallel). When there is no intersection between the tip 27 of 24 and the edge 20 of the guide plate 19 with respect to the line L, the pressure loss of the air flow is the smallest when it is 0 mm.

Example 2. FIG. 6 shows the support member 2 of the baffle plate 24.
2 is a perspective view showing the support member 16 of the guide plate 19, and a rectangular ventilation hole 35 is formed in the support member 22 made of sheet metal.
The support member 16 in FIG. 6 is provided with a strip and is bent in an approximately L-shape, while the rectangular large vent hole 35 is provided. Using the support members 16 and 22 in the hood device according to the first embodiment,
If the absorbing members 18 and 23 that absorb moisture and allow air to pass are provided in the same manner as in the first embodiment, an air flow passing through the support members 16 and 22 is generated as shown by an arrow 36 shown in FIG. The pressure loss of is further reduced.

Further, FIG. 7 also shows an embodiment in which the supporting member has a different structure, and the wire 37 is knitted in a lattice shape.
The support members 16 and 22 in which a large number of vent holes 35 having a size of about mm mm are formed are shown. It is preferable to use the large number of ventilation holes 35 having a lattice shape instead of the support member of the first embodiment because the pressure loss of the air flow is further reduced.

Further, FIG. 8 shows a supporting member 16 made of sheet metal.
An example is shown in which the vent hole 35 provided in 22 is a circular hole having a diameter of about 1 cm, and it is used in the same manner as in Examples 2 and 3, and the same effect can be expected.

Example 3. FIG. 10 shows an example of another absorbing member that can be used as the absorbing members 23 and 18.
The wire is knitted in a lattice shape to form a large number of small holes of about 1 mm square. The absorbent member 23 (1 shown in this embodiment
8) is a support member 1 having no holes shown in FIG.
If it is attached to 6, 22, the air stream containing moisture touches the grid of this wire, the moisture moves from the air stream to the wire side, and the moisture is wiped off by this wire, and the air stream is dried. realizable. In addition, FIG. 11 also shows the absorbing member 2
3 (18) shows another embodiment of the present invention, in which a sheet metal is used as an absorbing member 23 (18) in which a large number of small holes having a diameter of about 1 mm are formed, and a supporting member having no holes shown in FIG. 16 and 22, the moisture-containing air stream hits the absorbing member 23 (18), and the moisture absorbs the absorbing member 23 (1).
8) It adheres to the surface and is retained.

Example 4. 12 and 13 show the hood 11.
FIG. 12 shows an embodiment in which the absorbing member 31 attached to the inner wall surface of the is realized by a different structure. In FIG. 12, the absorbing member 31 is formed into a fine corrugated plate shape by knitting wires in a grid pattern to form a large number of small holes of about 1 mm square. It shows a state where it is attached to the inner wall surface of the hood with screws. In FIG. 12, the absorption member 3
The unevenness of the waves of 1 forms a gap between the inner wall surface of the hood 11 and the air flow. Further, the absorbing member 31 of FIG. 13 is formed of a punching metal in which a large number of small holes having a diameter of about 1 mm are formed in a sheet metal, and an interval that allows an air flow to pass between the absorbing member 31 and the inner wall surface of the hood. The spacers 38, 38 for forming the are interposed.

According to this embodiment, when the air flow hits the small holes, a turbulent flow is generated, so that the moisture easily adheres to the absorbing member 31, and the large number of small holes concentrate the moisture on the absorbing member 31 to cause a large water drop. It is possible to prevent the intrusion of rainwater and prevent the moisture from being transported to the indoor side by being carried by the air flow. Further, the durability is higher than that made of a material such as a non-woven fabric, and maintenance can be performed more easily.

[0043]

According to the present invention, since the baffle in the hood partially covers the front surface of the vent hole, it is possible to more easily prevent rainwater from entering the vent hole, and the vent hole becomes smaller. It is not necessary to make the hood large with respect to the ventilation port, and a more compact hood device can be provided. Further, since the baffle plate covers the front surface of the vent hole, it is possible to make the dimension of the opening and the dimension of the vent hole closer to each other, and the distance between the baffle plate and the guide plate is narrowed as in the conventional hood device. Therefore, the pressure loss of the air flow can be made smaller and the pressure loss of the air flow can be made smaller.

Further, the edge of the guide plate defining the opening is located below the tip of the baffle plate, and the baffle plate covers almost half the area of the vent hole, so that the infiltration of rainwater is sufficiently achieved. This has the effect of making the cross-sectional area of the air passage in the hood more uniform while preventing it, and further reducing the pressure loss of the air flow.

Further, since the edge of the guide plate that defines the opening is located substantially at the center of the lower surface of the hood, the opening is enlarged to facilitate the inflow of air flow, and the cross-sectional area of the air passage in the hood is increased. Can be made more uniform and the pressure loss of the air flow can be reduced.

Further, in the case where an absorbing member for absorbing water is provided near the inner wall surface of the hood, which is directed toward the tip end side above the baffle plate, the air flow guided to the baffle plate hits the absorbing member, and the water is absorbed here. Since the air flow that is strained and has less water content is supplied to the indoor side, infiltration of rainwater into the indoor side can be further reduced.

Further, in the case where at least one of the baffle plate and the guide plate has an absorbing member that absorbs moisture, the moisture is filtered by the absorbing member when the air flow passes through the air passage in the hood. It is possible to supply an air flow having a low water content to the indoor side, and thus it is possible to further reduce the intrusion of rainwater into the indoor side.

Further, in the case where at least one of the baffle plate and the guide plate has a ventilation hole for allowing air to pass therethrough, a part of the air that has been moisture-removed by the absorbing member passes directly through this ventilation hole to the inside of the room. Since it is sucked, not only the infiltration of rainwater into the indoor side can be further reduced, but at the same time, the pressure loss of air can be further reduced.

In addition, the inner wall surface of the hood is provided with an absorbing member having a large number of small holes and capable of adhering moisture, and a gap is formed between the absorbing member and the inner wall surface of the hood to allow passage of air flow. In the case where the air flow hits the small holes, turbulent flow is generated and moisture easily adheres to the absorbing member, and a large number of small holes prevent water from concentrating in the absorbing member to form large water droplets. In addition, it is effective in preventing rainwater from being carried in by preventing it from being transported to the indoor side by being carried by the air flow.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a perspective view showing an embodiment of the present invention.

FIG. 3 is a perspective view showing a main part of an embodiment of the present invention.

FIG. 4 is a cross-sectional view of essential parts of an embodiment of the present invention.

FIG. 5 is a cross-sectional view of essential parts of an embodiment of the present invention.

FIG. 6 is a perspective view showing a main part of another embodiment of the present invention.

FIG. 7 is a perspective view showing a main part of another embodiment of the present invention.

FIG. 8 is a perspective view showing another absorbing member of the present invention.

FIG. 9 is a perspective view showing another absorbing member of the present invention.

FIG. 10 is a perspective view showing another absorbing member of the present invention.

FIG. 11 is a perspective view showing another absorbing member of the present invention.

FIG. 12 is a perspective view showing another absorbing member of the present invention.

FIG. 13 is a perspective view showing another absorbing member of the present invention.

FIG. 14 is a cross-sectional view showing a conventional hood device.

FIG. 15 is a cross-sectional view showing a conventional hood device.

FIG. 16 is a cross-sectional view showing a conventional hood device.

[Explanation of symbols]

 11 Hood 16 Supporting Member 17 Lower End Surface 18 Absorbing Member 19 Guide Plate 20 End Edge 21 Opening 22 Supporting Member 23 Absorbing Member 24 Baffle Plate 27 Tip 29 Through Port 30 Air Channel 31 Absorbing Member 35 Vent Hole

Front page continuation (72) Yuichi Katayama 3-40 Tegano Shimobane, Nakatsugawa City, Gifu Prefecture Mitsubishi Electric Engineering Co., Ltd. Nagoya Office Nakatsugawa Branch Office (72) Inventor Shigetoshi Hibino 3 Tegano Shibano, Nakatsugawa City, Gifu Prefecture No. 40 Mitsubishi Electric Engineering Co., Ltd.Nagoya Office Nakatsugawa Branch

Claims (7)

[Claims] 1. A hood that is formed on a wall surface and covers the front side of a communication opening that communicates with the inside of the room, and has an opening that communicates with the communication opening below the hood, and the opening that is arranged on the lower surface side and front side of the hood. A guide plate that defines an air flow in the opening, and a baffle plate that is disposed on the lower side of the front surface of the passage and that has a tip end side that is bent or curved and that points toward the inner wall of the hood. A hood device characterized by: 2. The edge of the guide plate defining the opening is located below the tip of the baffle plate, and the baffle plate covers approximately half the area of the passage. 1. The hood device according to 1. 3. The hood device according to claim 2, wherein the end edge of the guide plate defining the opening is located substantially at the center of the hood lower end surface. 4. The hood device according to claim 1, further comprising an absorbing member for absorbing moisture, which is provided near an inner wall surface of the hood, which is directed toward a tip side above the baffle plate. 5. The at least one of the baffle plate and the guide plate has an absorbing member that absorbs moisture.
The food device according to any one of 1 to 5. 6. The baffle plate and the guide plate, at least one of which has a vent hole for allowing air to pass therethrough.
The food device according to any one of 1 to 6. 7. The inner wall surface of the hood has a large number of small holes,
The hood device according to claim 1, wherein an absorbing member capable of adhering moisture is provided, and a gap is formed between the absorbing member and an inner wall surface of the hood to allow an air flow to pass therethrough.