JP3229147U - Hood structure for intake device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hood structure for an intake device having a high intake force with a simple configuration. SOLUTION: A hood structure for an intake device connected to an intake device has a hood 11 arranged toward the intake target space and a guide surface 12a facing the intake target space, and is arranged so as to face the hood 11. The guide member 12 is provided. At least one of the hood 11 and the guide member 12 is provided with recesses 11c and 12b in portions facing each other. The guide member 12 is arranged apart from the hood 11 so that a gap G is formed between the guide members 12 at the portion closest to the hood 11. The guide member 12 has a size smaller than that of the hood 11 in a cross-sectional view across the gap G. The guide surface 12a is an inclined surface that projects toward the intake target space side as the distance from the gap G increases. [Selection diagram] Fig. 3

Description

The present invention relates to a hood structure used in an air intake device that collects air.

In recent years, the importance of suppressing droplets from the mouth has been emphasized in order to prevent or suppress the transmission of infectious diseases caused by viruses and bacteria. As an individual initiative, masks and face guards are used to prevent the droplets of others from being exposed and to prevent the droplets from spreading. On the other hand, a splash prevention plate (partition plate) such as an acrylic plate is provided between people to prevent the droplets from splashing on other people.

However, if the droplet prevention plate is low, the droplets may get over the partition plate. Even if the partition plate prevents direct exposure to droplets, if the scattered droplets adhere to the wall or the like and the droplets contain a virus or the like, the person who touches the wall or the like is infected. There is a risk.

In order to solve such a problem, it is conceivable to provide an intake device in the vicinity (above, etc.) of the droplet prevention plate to suck the droplets. However, in the experiment of the inventor of the present invention, it was found that a sufficient intake force cannot be exhibited simply by providing the intake device above the partition plate.

On the other hand, in an intake device such as a general ventilation fan, the intake force is increased by devising a hood structure. For example, in the ventilation device of Patent Document 1, a perforated plate as a rectifying plate is provided below the ventilation fan in the hood. In the ventilation device of Patent Document 2, a smoke collecting guide extending downward from the opening is provided in the hood. The exhaust hood of Patent Document 3 is provided with a surrounding wall portion provided so as to surround the exhaust port, and a straightening vane is provided on the outer surface of the surrounding wall portion so as to be inclined toward the ceiling and away from the surrounding wall portion.

Japanese Unexamined Patent Publication No. 6-300357 Japanese Unexamined Patent Publication No. 9-026178 Japanese Unexamined Patent Publication No. 2008-07096

In the above-mentioned ventilation device and the like, the exhaust (intake) force can be increased by the characteristic configuration. However, through experiments by the inventor of the present invention, it has been found that these techniques are not sufficient for the above-mentioned purposes. Therefore, the inventor of the present invention has come to create the present invention by repeating further ingenuity.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a hood structure for an intake device having a simple configuration and a high intake force.

In order to solve the above problems, the intake device hood structure connected to the intake device according to the present invention has a hood arranged toward the intake target space and a guide surface facing the intake target space. A guide member arranged to face the hood, and at least one of the hood and the guide member has a recess in a portion facing each other, and the guide member is provided in a portion closest to the hood. The guide members are arranged apart from the hood so that a gap is formed between them, the guide member has a size smaller than that of the hood in a cross-sectional view across the gap, and the guide surface has the same size. It is an inclined surface that protrudes toward the intake target space as the distance from the gap increases.

In this configuration, since a recess is formed in one of the portions where the hood and the guide member face each other, a larger space (internal space) is formed in the facing portion as compared with the case where no recess is formed in any of the recesses. ) Is formed. Then, when a suction force from the intake device is applied to the space, the internal space becomes a negative pressure state. Since this internal space communicates with the intake target space through a gap, when the internal space is in a negative pressure state, a force is generated in which the air in the intake target space tries to flow into the internal space. This force acts largely along the guide surface. Therefore, for example, if a splash prevention plate or the like is placed near the portion where the guide surface protrudes most toward the intake target space side, the droplet prevention plate will flow into the internal space through the gap along the guide surface. The force to act. Therefore, the air in the vicinity of the droplet prevention plate can be effectively sucked into the intake device.

As the shape of the guide surface, various shapes can be adopted. In one of the preferred embodiments of the intake device hood structure according to the present invention, the guide surface has a curved shape that is substantially convex toward the intake target space in the cross-sectional view. More preferably, the guide surface is semicircular in the cross-sectional view.

In this way, by making the cross-sectional view shape of the guide surface substantially a curved shape that is convex toward the intake target space side, particularly a semicircular shape, when an air flow along the surrounding guide surface is generated, the surroundings It can entrain air and create a large air flow. Therefore, intake can be performed more efficiently.

In one of the preferred embodiments of the intake device hood structure according to the present invention, the hood and the guide member both have recesses in portions facing each other, and the guide member has at least the guide surface as a portion. Is arranged so as to be located inside the recess of the hood.

In this configuration, a large internal space can be formed by forming recesses in both the hood and the guide member. Therefore, when the intake force of the intake device is applied to the internal space, a more negative pressure state can be obtained and a large air flow can be generated.

In one of the preferred embodiments of the intake device hood structure according to the present invention, the hood and the guide member are long, and the gap is formed along the longitudinal direction of the hood.

If the hood structure for the intake device configured in this way is arranged near the edge of a plate-shaped member such as a splash prevention plate or near the edge of a flat surface such as a wall, air near those surfaces can be efficiently sucked. It is possible to improve the intake efficiency.

It is a perspective view which shows the installation example of the hood structure for an intake device. It is an exploded perspective view of the hood structure for an intake device. It is sectional drawing of the hood structure for an intake device. It is sectional drawing of the hood structure for an intake device in another embodiment. It is a perspective view of the hood structure for an intake device in another embodiment.

An embodiment of the hood structure for an intake device according to the present invention will be described below with reference to the drawings. The intake device in the present invention refers to a device that collects air in a certain space and moves it to another space regardless of the names of the ventilation device such as a ventilation fan and the exhaust device.

FIG. 1 is a perspective view showing an installation example of a hood structure for an intake device according to the present invention. FIG. 2 is an exploded perspective view of the hood structure for the intake device. Further, FIG. 3 is a sectional view taken along line III-III in FIG. The cross-sectional view in the following description refers to the arrow III-III view, that is, the one shown in FIG.

As shown in FIG. 1, in the present embodiment, the intake device hood structure 1 is installed on the desk D and is connected to the intake device A via the duct 2. Further, a splash prevention plate B is arranged below the intake device hood structure 1. As a result, it is possible to prevent the droplets from the mouth from scattering to the other party even if the conversation or the like is held with the splash prevention plate B sandwiched between them. Therefore, in the present embodiment, the space below the intake device hood structure 1 is the intake target space, and the intake target space side means the lower side of the intake device hood structure 1.

[Food, guide member]
As shown in FIG. 2, the intake device hood structure 1 includes a hood 11 and a guide member 12. Both the hood 11 and the guide member 12 have a long shape slightly longer than the width of the droplet prevention plate B. Further, as shown in FIG. 3, both the hood 11 and the guide member 12 have a semicircular cross-sectional shape, and a first recess 11c and a second recess 12b are formed in portions facing each other, respectively. That is, the hood 11 and the guide member 12 have a shape in which a thin annular member is cut in half in the axial direction.

In cross-sectional view, the width of the hood 11 is larger than the width of the guide member 12, and the guide member 12 is housed inside the first recess 11c of the hood 11. In the present embodiment, the outer surface (lower side surface) of the guide member 12 corresponds to the guide surface in the present invention, and is referred to as the guide surface 12a. In the present embodiment, the entire guide member 12 is housed inside the first recess 11c, but the end portion of the guide member 12 on the intake target space side may protrude from the first recess 11c.

As shown in FIG. 3, in a cross-sectional view, both ends of the guide member 12 on the hood 11 side are slightly separated from the inner surface of the hood 11, and a gap G is provided between the inner wall of the hood 11 and both ends of the guide member 12. Is formed. In the following description, the space formed by the first recess 11c of the hood 11 is referred to as an internal space S. Further, among the internal spaces S, the space substantially surrounded by the first recess 11c of the hood 11 and the second recess 12b of the guide member 12 is referred to as the first internal space S1, and the rest is referred to as the second internal space S2. Refer to.

As shown in FIG. 2, plate-shaped end plates 11a having the same cross-sectional shape as the hood 11 are fixed to both ends of the hood 11 in the longitudinal direction. As a result, the hood 11 has a shape that opens only to one side (downward in this embodiment). Further, the end portion of the guide member 12 in the longitudinal direction is fixed to the upper end of the support member 13. Both ends of the guide member 12 in the longitudinal direction are closed by the support member 13, and the guide member 12 also has a shape that opens only to one side (upper in the present embodiment). The leg portion 14 is fixed to the lower end portion of the support member 13. As a result, the support member 13 can stand on its own, and the guide member 12 can be installed on the desk D in a state of being supported by the support member 13.

〔duct〕
In the present embodiment, the intake device A is installed at a position away from the intake device hood structure 1. Therefore, as shown in FIG. 1, in the present embodiment, a duct 2 composed of a plurality of pipes 21 and a plurality of elbows 22 is connected to the intake device hood structure 1 as an air flow path. ing. The duct 2 communicates with the first recess 11c (internal space S), and the air in the internal space S of the hood 11 can be guided to the intake device A by the duct 2. The specific configuration of the duct 2 is as follows.

An elbow 22a that communicates with the internal space S of the hood 11 and changes the direction of the flow path from the vertical direction to the horizontal direction is attached to the upper center of the hood 11 in the longitudinal direction, that is, on the side opposite to the intake target space. .. A pipe 21a is connected to the elbow 22a, an elbow 22b is connected to the other end of the pipe 21a, and the direction of the flow path is changed from the horizontal direction to the vertical direction. Further, the upper end of the pipe 21b is connected to the other end of the elbow 22b, and the elbow 22c is connected to the lower end of the pipe 21b. A pipe 21c is connected to the other end of the elbow 22c, and an elbow 22d connected to the intake device A is connected to the other end of the pipe 21c. In the present embodiment, the pipe 21b is a normal straight pipe, but if this is a stretchable pipe, the installation height of the guide member 12 can be easily changed, which is preferable. Further, the structure of the duct is appropriately changed, and the intake device A may be arranged in the vicinity of the hood 11 so as to exhaust the air through the duct.

[Splash prevention plate]
The splash prevention plate B may have a plate shape, a film shape, or the like as long as it can prevent splashes from the mouth from scattering to the other side. In addition, various materials can be used, but a transparent material is preferable because the state of the other party can be confirmed.

[Intake device]
As the intake device A in the present embodiment, various suction devices can be used as long as the suction force can act on the internal space S of the hood 11. Since the intake device A discharges the sucked air to the outside of the device, it is desirable to discharge the air after sterilizing, sterilizing, etc., for the purpose of preventing infectious diseases.

〔Installation method〕
The installation method of the hood structure 1 for the intake device in the present embodiment will be described below with reference to FIG. First, the guide member 12 to which the support member 13 is fixed is installed on the desk D. Next, the bolt 3 is inserted into the screw hole (not shown) of the guide member 12 from below and fastened with the nut 4a. As a result, the bolt 3 is fixed to the guide member 12.

Next, the nut 4b is fastened to the bolt 3. The nut 4b restricts the downward movement of the hood 11. Specifically, as shown in FIG. 3, the position of the nut 4b is determined so that a gap G is formed between the inner surface of the hood 11 and both side ends of the guide member 12. The size of this gap G is about several millimeters, for example, 2 to 3 mm.

Then, the hood 11 is covered and fastened with the bolt 4c so that the bolt 3 is inserted into the screw hole 11b of the hood 11.

After that, the duct 2 is connected to the hood 11. In this embodiment, the nut 6a is fixed to the pipe 21b in order to stably install the duct 2. Specifically, a screw hole 13a is formed in the support member 13 close to the pipe 21b, and the bolt 5 inserted through the screw hole 13a is tightened to the nut 6a and also tightened by the nut 6b.

The bolt 3 includes a hook 31 that hangs from the head. On the other hand, a hole b is formed in the vicinity of the upper edge of the droplet prevention plate B. By inserting the hook 31 through the hole b, the splash prevention plate B is supported by the guide member 12 via the bolt 3.

Next, the function of the intake device hood structure 1 according to the present invention will be described with reference to FIG. The white arrows in the figure indicate the flow of air. When the intake device A is operated, the suction force acts on the first internal space S1 of the hood 11 via the duct 2, and the air in the first internal space S1 flows out to the duct 2. At this time, since the first internal space S1 is in a negative pressure state, an air flow from the inside of the second internal space S2 to the first internal space S1 occurs. Since the first internal space S1 and the second internal space S2 communicate with each other through the gap G, this air flow becomes a substantially jet flow. Therefore, the flow of air from the second internal space S2 to the first internal space S1 entrains the surrounding air and forms a strong flow. Therefore, the air flow tends to act on the air outside the internal space S, and the air around the droplet prevention plate B also rises along the plate surface of the droplet prevention plate B and follows the guide surface 12a and the like. It flows and flows into the first internal space S1 through the gap G.

As described above, in the intake device hood structure 1 according to the present invention, by adopting the above-mentioned structure, it is possible to generate a jet flow, generate a large air flow, and increase the suction force.

[Another Embodiment]
(1) In the above-described embodiment, the cross-sectional shape of the first recess 11c and the second recess 12b formed in the hood 11 and the guide member 12 is a semi-arc, but at least one of them may be a rectangle having opposite sides open. Absent. For example, as shown in FIG. 4A, the recess 11c is formed by making the cross-sectional shape of the hood 11 a rectangle whose lower side (guide member 12 side, intake target space side) opens.

(2) In the above-described embodiment, the cross-sectional shape of the guide surface 12a is a semi-arc, but as shown in FIG. 4B, it may be linear.

(3) In the above-described embodiment, the cross-sectional shape of the guide surface 12a is symmetrical, but it can also be asymmetric. For example, in FIG. 4C, the cross-sectional view shape of the guide surface 12a is an arc of 90 °, and the vicinity of one end is fixed by a bolt 3. Similarly, the hood 11 has a 90 ° arc in cross section, but the left side in the figure is closed and only the lower part is open. In this case, the gap G is formed only on one side (right side), but the air on the right side of the droplet prevention plate B can be sucked. Such a configuration is suitable for installing the intake device hood structure 1 near a wall or the like, for example.

(4) In the above-described embodiment, the first recess 11c and the second recess 12b are formed in the hood 11 and the guide member, respectively, but the recess may be formed in only one of them. That is, the hood 11 has a flat plate shape, and the guide member 12 has a shape as in the above-described embodiment. Alternatively, the recess as described above is formed in the hood 11, and the surface of the guide member 12 on the hood 11 side is made flat. However, even in the latter case, the shape of the guide surface 12a is maintained.

(5) In the above-described embodiment, the hood 11 and the guide member 12 are formed with the first recess 11c and the second recess 12b, respectively, and the inner surface thereof has a semicircular shape in a cross-sectional view. It may have a curved shape that is convex to the surface. Further, in the above-described embodiment, the cross-sectional shape of the recess is an arc of 180 °, but the angle is not limited to 180 °.

(6) In the above-described embodiment, the hood 11 and the guide member 12 are long so that the air near the plane such as the splash prevention plate B can be efficiently sucked, but the hood 11 and the guide member 12 are long in shape. It does not have to be a scale. For example, as shown in FIG. 5, a hemispherical shape in which the first recess 11c and the second recess 12b are formed may be formed.

(7) The present invention is not limited to the examples concretely shown in the embodiment and another embodiment, and includes a combination of the technical ideas shown in these examples.

The present invention can be used as a hood of an intake device called an exhaust device, a ventilation device, etc., which sucks air in a certain space and moves it to another space.

A: Intake device G: Gap 1: Hood structure for intake device 11: Hood 11c: First recess 12: Guide member 12a: Guide surface 12b: Second recess

Claims (5)

It is a hood structure for the intake device that is connected to the intake device.
The hood placed toward the intake target space and
A guide member having a guide surface facing the intake target space and arranged to face the hood is provided.
At least one of the hood and the guide member is provided with a recess in a portion facing each other.
The guide members are arranged apart from the hood so that a gap is formed between them at the portion closest to the hood.
The guide member has a size smaller than that of the hood in a cross-sectional view across the gap.
The guide surface is a hood structure for an intake device, which is an inclined surface that protrudes toward the intake target space as the distance from the gap increases. The hood structure for an intake device according to claim 1, wherein the guide surface has a curved shape that is substantially convex toward the intake target space in the cross-sectional view. The intake device hood structure according to claim 2, wherein the guide surface is semicircular in the cross-sectional view. The hood and the guide member both have recesses in portions facing each other.
The intake device hood structure according to any one of claims 1 to 3, wherein the guide member is arranged so that at least the guide surface is partially located inside the recess of the hood. The hood and the guide member are long and
The intake device hood structure according to any one of claims 1 to 4, wherein the gap is formed along the longitudinal direction of the hood.