JP6814933B2 - Ventilation port hood - Google Patents

Description

The present invention relates to a ventilation port hood attached to an air intake of a building outdoor wall in which a blower is arranged on the downstream side of an air flow to take in outdoor air into the room in order to ventilate the room.

Conventionally, as a ventilation port hood of this type, for example, the one of Patent Document 1 is known.

Ventilation port The hood is installed from the ventilation port, which is the air intake of the outdoor wall of the building, for the purpose of preventing the inflow of rain and wind, and is connected to the cover to prevent rain and wind, the inflow port to take in air, and the ventilation duct. Therefore, it is composed of a cylindrical outlet protruding to the back side of the ventilation port hood and a garage to prevent the inflow of small animals and large scattered objects.

Japanese Unexamined Patent Publication No. 2011-242081

In such a conventional ventilation port hood, there is a wide gap in the garage, and small insects such as moths, mosquitoes, and flies flow in. Therefore, in order to prevent the inflow of these small insects, a net is used as a filtration device in the ventilation port hood. Was set up and collected by the filtration method.

However, these small insects accumulate on the net, causing clogging, making it impossible to take in air and ensuring a predetermined ventilation volume, so there is a problem that maintenance work to remove the clogging occurs. Was there.

Therefore, the present invention solves the above-mentioned conventional problems, and an object of the present invention is to provide a ventilation port hood capable of separating small insects, water droplets and the like (hereinafter, foreign matter) and requiring no maintenance work. ..

In order to achieve this object, vent hood according to the present invention, the gas stream flows from the side portion includes a cover that flows out from the bottom part, the central axis of the cover on the inner peripheral side, cover a cylindrical tube equipped to allow the inside of the cover into a negative pressure and from the inside through the bottom surface portion, the first swirl chamber, respectively to the inner peripheral side of the outer peripheral side and the cover of the circular cylinder tube and the second swirl chamber forming a space which becomes, Ru includes a space division plate having a cylindrical shape or truncated cone shape, and a cylindrical member provided so as to face the end surface of the circular cylinder tube in a first whirling chamber. Cover has a top surface portion facing the bottom portion, the side surface portion, Ru and a first air supply port and the second air supply port provided on the top face side which is provided on the bottom surface side. The first air inlet is a plurality of openings formed by arranging a plurality of fixed vanes so as to surround the side surface of the cover, communicates with the first swirl chamber. Second air supply port in a state of arranging the centered axis horizontal, a vertical, centered axis, an opening located at the lowest portion of the side surface portion of the cover, communicates with the second swirl chamber .. Space division plate will have a through-hole communicating with the first swirl chamber and a second swirl chamber. Position of the transmural hole, the distance in the flow direction of the airflow swirling the first swirl chamber is set to be longer than the distance counter flow direction when the second air supply port and the base point around centered axis Monodea Ru. In this way, the intended purpose is achieved.

According to the ventilation port hood according to the present invention , the outdoor air entering from the first intake port becomes a swirling airflow and flows into the first swirling chamber, and the foreign matter contained in the swirling airflow receives centrifugal force to create a space. It goes around the vicinity of the dividing plate and moves to the second swivel chamber through the through hole provided in the space dividing plate. Natural wind is flowing around the ventilation port hood, the static pressure drops outside the second intake port, a flow toward the outside is generated, and foreign matter stored in the second intake port, which is a separation chamber, is removed. It will be discharged to the outside from the second intake port. That is, it is possible to obtain the effect that foreign matter can be separated without providing a filtration device, the occurrence of clogging is eliminated, and the separated foreign matter does not continue to accumulate, so that maintenance work is not required. it can.

External perspective view from above the ventilation port hood according to the embodiment of the present invention External perspective view from below the ventilation port hood The figure which shows the internal structure of the ventilation port hood (cross-sectional view which cut vertically on the central axis) Rear view of the ventilation port hood without the base Front view with the ventilation port hood cover removed The figure which shows the shape of the impermeable member of Embodiment 2. The figure which shows the notch provided in the water-impervious member of Embodiment 3.

Vent hood according to the present invention, the airflow flows from the side surface, and a cover that flows out from the bottom portion includes the inner circumferential side on the central axis of the cover, cover and through the bottom surface from the inside of the cover a cylindrical tube equipped to allow the inner negative pressure, to form the respective inner circumferential side of the outer peripheral side and the cover of the circular cylinder tube space comprising a first swirl chamber and a second swirl chamber, cylindrical or conical Ru with a space division plate forming a trapezoidal shape and a cylindrical member provided so as to face the end surface of the circular cylinder tube in a first whirling chamber. Cover has a top surface portion facing the bottom portion, the side surface portion, Ru and a first air supply port and the second air supply port provided on the top face side which is provided on the bottom surface side. The first air inlet is a plurality of openings formed by arranging a plurality of fixed vanes so as to surround the side surface of the cover, communicates with the first swirl chamber. Second air supply port in a state of arranging the centered axis horizontal, a vertical, centered axis, an opening located at the lowest portion of the side surface portion of the cover, communicates with the second swirl chamber .. Spatial division plate will have a through-hole communicating with the first swirl chamber and a second swirl chamber. Position of the transmural hole, the distance in the flow direction of the airflow swirling the first swirl chamber is set to be longer than the distance counter flow direction when the second air supply port and the base point around centered axis Has a configuration.

As a result, for example, a blower that communicates with a cylindrical tube can create a negative pressure inside the cover, so that the outdoor air that enters from the first intake port becomes a swirling airflow and flows into the first swirling chamber. Here, the foreign matter contained in the swirling airflow receives centrifugal force, orbits in the vicinity of the space dividing plate, and moves to the second swirling chamber through the through hole provided in the space dividing plate. That is, the second swivel chamber is a separation chamber that receives the separated foreign matter. The foreign matter moves below the second swivel chamber, which has become a separation chamber due to gravity, to the vicinity of the second intake port. Foreign matter that has moved to the second air supply port is discharged to the outside from the second intake port under the influence of the natural wind outside.

Further, since the inside of the cover has a negative pressure, air usually flows in from the second intake port as well . Since a part of the swirling airflow in the first swirl chamber flows into the second swirl chamber through the through hole with directivity, the airflow in the second swirl chamber has the same swirling direction as the airflow in the first swirl chamber, and the second intake air. The airflow flowing in from the mouth swirls on the swirling airflow. As a result, foreign matter that has moved from the first swivel chamber to the second swivel chamber and foreign matter that has flowed into the second swivel chamber from the second intake port can be moved to the outer peripheral side of the second swivel chamber, and the foreign matter penetrates. Since the movement from the hole to the first swivel chamber can be suppressed, the deterioration of the separation performance can be suppressed.

Further, in the vent hood according to the present invention, spatial division plate, the centered axial direction, than the first air supply ports are located on the top surface side, of the air-separation plate at the centered axis It has a configuration in which the end face of the circular cylinder tube is extended to the periphery.

As a result, while the air and foreign matter flowing in from the first air supply port swirl, the traveling direction is once toward the top surface side of the cover, the traveling direction of the swirling flow is reversed on the top surface side, and the flow toward the inside of the cylindrical tube. It becomes. As a result, the distance in the traveling direction of the swirling flow can be increased, so that the foreign matter can be sufficiently moved to the outer peripheral side by the centrifugal force, and the separation performance can be improved.

Further, in the vent hood according to the present invention, provided in a second whirling chamber, the spatial division plate, a first shielding member provided upright so as to block a portion of the flow path of the second pivot indoor air flow the first shielding member has a configuration in which extended to the outer peripheral side from the central axis side than the line connecting the middle mandrel and the second air supply port at penetrations hole side.

As a result, deterioration of the separation performance of foreign matter can be suppressed. That is, the foreign matter separated in the second swivel chamber moves to the vicinity of the second air supply port due to gravity, but soars up due to the air flowing in from the second air supply port. However, the soaring foreign matter collides with the first shielding member and loses its momentum, so that the foreign matter moves to the through hole side, flows into the first swivel chamber through the through hole, and is prevented from scattering downstream. Further, by providing the first shielding member, the air flowing in from the second air supply port can be directed in the direction opposite to that of the first shielding member, so that the swirling flow of the second swirl chamber can be strengthened. This makes it possible to prevent foreign matter in the second swivel chamber from flowing into the first swivel chamber through the through hole, and to suppress deterioration of separation performance.

Further, in the vent hood according to the present invention, provided in a second whirling chamber, the spatial division plate, the second shielding member provided upright so as to block a portion of the flow path of the second pivot indoor air flow , the second shielding member has a configuration in which to extend toward the outer periphery from the central axis side than the centered axis above.

As a result, deterioration of the separation performance of foreign matter can be suppressed.

In the upper part of the second swivel chamber, a flow in the same direction as the flow direction of the airflow swirling in the first swivel chamber is generated, and if there is no second shielding member, foreign matter moving along with the flow in the second swivel chamber Among them, the foreign matter moving along the surface of the space dividing plate flows into the first swivel chamber as it is from the through hole and scatters to the downstream side, causing deterioration of the separation performance. Therefore, the second shielding member can prevent the movement of foreign matter on the surface of the space dividing plate, prevent the foreign matter from flowing into the first swivel chamber from the through hole, and suppress the deterioration of the separation performance.

Further, in the vent hood according to the present invention, having the configuration of arranging the blind plate between one opening and another opening of the first air supply ports in the top and bottom of the cover.

As a result, the blind plate on the upper part of the cover can suppress the inflow of foreign matter and water droplets falling from directly above the ventilation port hood. Further, the blind plate at the lower part of the cover can suppress the foreign matter discharged to the outside from the second air supply port from flowing in again from the first air supply port, and can suppress the deterioration of the separation performance.

Further, in the vent hood according to the present invention, in a first whirling chamber, the circular column member erected from the wall surface of the top surface side, a water-impervious ring-shaped member that surrounds the outer periphery of the circular pillar member wall surface It has a provided configuration.

As a result, it is possible to prevent water droplets flowing in from the first air supply port from scattering downstream of the ventilation port hood. Like foreign matter, water droplets swirl on the swirling flow in the first swirling chamber and receive centrifugal force. When the water droplets that have moved to the outer peripheral side collide with the space dividing plate, they adhere to the surface. The attached water droplets move downward due to gravity, and some of them collide with the cylindrical member and are scattered along the surface of the cylindrical member into the cylindrical tube. Therefore, by providing a ring-shaped water-shielding member so as to surround the circumference of the cylindrical member, it is possible to suppress the transmission of water droplets to the cylindrical member, and it is possible to suppress deterioration of the water droplet separation performance.

Further, in the vent hood according to the present invention, water shield member has a structure in which a slope on the side surface inside the circle Columns side so that the water on the outside flows of water shielding member.

As a result, after the water droplets that have entered the inside of the water-impervious member move downward due to gravity, the inclination provided on the inner side surface of the water-impervious member facilitates the movement to the outside and suppresses the water droplets from being transmitted to the cylindrical member. It is possible to suppress the deterioration of the separation performance of water droplets.

Further, in the vent hood according to the present invention, water shield member has a structure in which a notch in the position of the bottom in the state in which the centered axis horizontally.

As a result, after the water droplets that have entered the inside of the impermeable member move downward due to gravity, the water droplets can easily move to the outside of the impermeable member from the notch, and the water droplets can be suppressed from being transmitted to the cylindrical member. It is possible to suppress the deterioration of the separation performance of water droplets.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
1 and 2 are external perspective views of the ventilation port hood according to the present embodiment, FIG. 1 is a perspective view from diagonally above, and FIG. 2 is a perspective view from diagonally below.

As shown in FIGS. 1 and 2, the ventilation port hood 1 penetrates the base plate 3 including the cover 2 having a rotating body shape, the base plate 3 forming the bottom surface of the cover 2, and the central axis 4 of the cover 2. It is provided with a cylindrical tube 5 fixed in place. Here, the shape of the rotating body is a shape formed by rotating around the central axis 4.

The front side of the ventilation port hood 1, that is, the bottom surface portion on the side opposite to the base plate 3, has a dome-shaped top surface 6 with the cover 2 protruding outward. The cover 2 has the central axis 4 aligned with the most protruding portion of the top surface 6. The top surface portion 6 may be flat.

The side surface portion 7 of the cover 2 is provided with a first air supply port 8, a blind plate 9 that partially closes the first air supply port 8, and a second air supply port 10.

The first air supply port 8 is a plurality of openings in which a plurality of fixing blades 11 are arranged around the side surface portion 7 at predetermined intervals. In this embodiment, 20 fixing blades 11 are provided, and all of them face the same angle with respect to the central axis 4. As a result, the airflow that has passed through the fixed blades 11 can be swirled. The first air supply port 8 is provided on the side surface portion 7 at a position particularly close to the base plate 3 side.

Although the upstream end portion 12 of the fixing blade 11 is arranged on the same surface as the side surface portion 7 of the cover 2 in FIG. 3, even if it is arranged on the inner peripheral side from the side surface portion 7, it protrudes to the outer peripheral side. May be placed.

The blind plate 9 suppresses the inflow of airflow at the upper and lower parts of the first air supply port 8. Although the cover 2 is not provided with the fixing blades 11 on the blind plate 9, the fixing blades 11 may be provided on the inside of the blind plate 9. The blind plate 9 has an appearance arranged between one opening of the first air supply port 8 and the other opening.

The blind plate 9 also has a role of connecting the base plate 3 and the cover 2. As a result, the base plate 3, the cylindrical pipe 5, and the cover 2 are integrated, so that the ventilation port hood 1 can be fixed by inserting the cylindrical pipe 5 into the ventilation port on the outer wall of the building.

The cylindrical tube 5 is provided so that the inside of the cover 2 can have a negative pressure outside the ventilation port hood 1. For example, by connecting a blower (not shown) to the cylindrical tube 5, the inside of the ventilation port hood 1 can be made negative pressure. By making the inside of the cover 2 negative pressure in this way, the airflow flows in from the side surface portion 7 of the cover 2 and flows out from the cylindrical tube 5.

As shown in FIG. 2, the second air supply port 10 is provided at the lowermost portion of the side surface portion 7 of the cover 2, and has a vertically elongated shape in the direction of the central axis 4. Further, the second air supply port 10 is provided at a position adjacent to the lower blind plate 9 in the direction of the central axis 4 on the side surface portion 7. It should be noted that there may be a gap that is not completely adjacent to the blind plate 9. In the present embodiment, the opening area of the first air supply port 8 (the opening area here is calculated from the circumference length of the side surface portion 2 and the opening width in the central axis 4 direction) is relative to the second air supply port. The opening area of 10 is about 0.6%, which is very small with respect to the first air supply port 8.

Next, the internal structure of the ventilation port hood in the present embodiment will be described.

As shown in FIG. 3, the space dividing plate 13 and the cylindrical member 14 are provided inside the cover 2.

The space dividing plate 13 forms a space serving as a first swivel chamber 15 and a second swivel chamber 19 on the outer peripheral side of the cylindrical tube 5 and the inner peripheral side of the cover 2, respectively.

The cylindrical member 14 is a cylindrical body having the same axis as the central axis 4 of the cover 2 in the first swivel chamber 15, and is provided at a position facing the end surface of the cylindrical tube 5 by using a fixing plate 16. In the present embodiment, the cylindrical member 14 is supported by the fixing plate 16, but the cylindrical member 14 may be directly fixed to the inner wall of the cover 2 without using the fixing plate 16.

As shown in FIG. 4, four cylindrical blades 17 curved in an arc shape in a cross section perpendicular to the central axis 4 are evenly and radially arranged on the cylindrical tube 5 side of the cylindrical member 14.

The cylindrical tube 5 is an end face located inside the cover 2. The cylindrical tube end face 18 extends into the space dividing plate 13 as shown in FIG.

As shown in FIG. 3, the space dividing plate 13 is a cylinder extending in the direction of the central axis 4 from the position where the fixing blade 11 is sandwiched with respect to the base plate 3 in the direction of the central axis 4, and is extended. The fixing plate 16 is arranged on the bottom surface located at the end. Inside the cover 2, the cross section in the direction of the central axis 4 is trapezoidal, that is, a truncated cone-shaped cylinder. Due to the truncated cone shape, the swirling diameter of the swirling flow swirling around the first swirl chamber 15 becomes smaller as the distance from the first air supply port 8 side toward the central axis 4 directions. The space dividing plate 13 may have a cylindrical shape. In this case, the swirling diameter of the swirling flow swirling around the first swirl chamber 15 is the same at any location.

As shown in FIG. 5, the space dividing plate 13 has a through hole 21 that communicates the first swivel chamber 15 and the second swivel chamber 19, and the first shielding member 22 and the second shield member 22 arranged on the second swivel chamber 19 side. It includes a shielding member 23.

As shown in FIG. 4, the through hole 21 is a distance in the flow direction (arrow in FIG. 4) of the airflow swirling in the first swivel chamber 15 around the central axis 4 with the second air supply port 10 as the base point. Is open at a position longer than the distance in the counterflow direction, above the central axis 4 and closer to the fixing plate 16 side. In the cross-sectional view of FIG. 3, the through hole 21 does not overlap with the cylindrical tube 5, but the through hole 21 may be widened in the central axis 4 direction to the overlapping position. Further, the space dividing plate 13 may be opened over the entire four directions of the central axis.

The first shielding member 22 extends from the center side to the outer peripheral side on the through hole 21 side from the line connecting the central shaft 4 and the second air supply port 10 in the vicinity of the second air supply port 10 in the second swivel chamber 19. It is a plate-like body provided. As shown in FIG. 3, a gap is provided between the first shielding member 22 and the cover 2, and the structure is such that a part of the flow path in the second swivel chamber 19 is shielded.

As shown in FIG. 3, the second shielding member 23 is a plate-like body extending from the center side to the outer peripheral side at the uppermost portion in the second swivel chamber 19. Similar to the first shielding member 22, the structure is such that a part of the second swivel chamber 19 is shielded, and a gap is provided on the cover 2 side. The second shielding member 23 does not have to be the uppermost portion in the second swivel chamber 19 as long as it is above the central axis.

Further, the fixing plate 16 is provided with a water-impervious member 25.

The water-impervious member 25 is a rib-shaped member that surrounds the cylindrical member 14 at a distance from the side surface of the cylindrical member 14. The water-impervious member 25 in the present embodiment has a ring shape with no break in the circumferential shape, and its side surface is parallel to the cylindrical member 14. If the distance between the side surface of the cylindrical member 14 and the impermeable member 25 is too large, the impermeable effect becomes small. Therefore, the average diameter of the end of the space dividing plate 13 on the top surface side of the cover 2 and the diameter of the cylindrical member 14 are averaged. It is better to place it at a position smaller than the diameter.

Next, the flow of airflow will be described.

In the above configuration, the main ventilation port hood is attached to the air supply port portion of the outdoor outer wall when the outdoor air is supplied to the room such as a house by using a blower, and the air flow flows by the downstream blower. The outdoor air flows into the ventilation port hood from the first air supply port 8 and the second air supply port 10. Since the first air supply port 8 is much larger as described above, most of the inflow air flows in from the first air supply port 8. The air flowing in from the first air supply port 8 becomes a swirling flow that swirls around the central axis by a plurality of fixed blades arranged diagonally, passes through the first swirl chamber 15, and is outside the ventilation port hood from the cylindrical pipe 5. Outflow to.

The air flowing in from the second air supply port 10 flows into the second swivel chamber 19, but the air flowing in from the second air supply port 10 is suppressed by the first shielding member 22 shown in FIG. Most of the airflow flows toward the side opposite to the first shielding member 22, passes through the annular second swivel chamber 19, flows into the first swivel chamber through the through hole 21, and then flows from the cylindrical tube 5. Ventilation port Outflow to the hood. Further, a part of the swirling flow of the first swirl chamber 15 flows into the second swirl chamber 19 through the through hole 21. The second swivel chamber 19 is produced by directing the inflow from the first swivel chamber 15 to the second swivel chamber 19 and the airflow flowing in from the second air supply port 10 by the first shielding member 22 described above. The air inside swirls in the same direction as the swirling flow in the first swirl chamber 15.

Next, the movement of foreign substances (for example, small insects such as mosquitoes, Drosophila, mushroom flies, and moths) and water droplets that flow into the ventilation port hood together with air will be described.

Foreign matter and water droplets that flow in from the first air supply port 8 together with air receive centrifugal force due to the swirling flow in the first swirling chamber 15 and move to the outer peripheral side. The foreign matter moves from the through hole 21 to the second swivel chamber 19 and is temporarily stored in the second swivel chamber 19. When the water droplet moves to the outer peripheral side in the first swivel chamber 15, it collides with the wall surface of the space dividing plate 13 and adheres to the wall surface. The attached water droplets gather together and become large, and hang down due to gravity.

Foreign matter and water droplets that have flowed in from the second air supply port 10 are swirled by the swirling flow in the second swirl chamber 19, receive centrifugal force, and move to the outer peripheral side. The air in the second swivel chamber 19 flows from the through hole 21 to the first swivel chamber 15, but since the foreign matter swirls on the outer peripheral side, it is difficult for the foreign matter to flow into the first swivel chamber 15 from the through hole 21. The water droplets adhere to the inner surface of the second swivel chamber 19, hang down due to gravity, and are discharged from the second air supply port 10.

As described above, the foreign matter is stored in the second swivel chamber 19, but is discharged from the second air supply port 10 by the natural wind flowing outside the ventilation port hood. That is, when natural wind flows outside the second air supply port 10, the static pressure decreases according to Bernoulli's theorem. At this time, if the pressure is lower than the static pressure in the ventilation port hood near the second air supply port 10, the foreign matter is pulled out and the foreign matter is discharged from the second air supply port 10 to the outside of the ventilation port hood.

Next, the effects and actions of the present embodiment will be described.

The characteristic structure of the ventilation port hood is that the inside of the ventilation port hood has a double structure by the space dividing plate 13, and the first swivel chamber 15 and the second swivel chamber 19 are arranged. As described above, the second swivel chamber 19 serves as a separation chamber for temporarily storing the foreign matter separated by the centrifugal force in the first swivel chamber 15. Since a general cyclone structure has a separation chamber (dust collection chamber) below the swivel chamber, it becomes long vertically, but this ventilation port hood has a separation chamber around the swivel chamber. It has a compact structure.

As the name of the second swirl chamber 19, the separation chamber of the main ventilation port hood has a structure in which the air flow is swirled by the inflow of the swirling flow from the through hole 21 and the first shielding plate. As a result, the foreign matter in the second swivel chamber 19 moves to the outer peripheral side, so that it rarely returns from the through hole 21 to the first swivel chamber 15. In the case of a large foreign substance that cannot move to the outer peripheral side, it is pushed by the swirling flow along the space dividing plate and moves, but in this case, it collides with the second shielding member 23 at the upper part of the second swirl chamber 19, so that it is more than that. It cannot proceed and does not flow to the through hole 21 side. That is, it is possible to prevent a large foreign substance for which centrifugal force does not work from flowing into the first swivel chamber.

The position of the through hole 21 is arranged at a suitable position in the present embodiment in order to improve the separation performance of foreign matter and prevent the inflow from the second swivel chamber 19 into the first swivel chamber 15. The foreign matter swirls in the first swivel chamber 15 and receives a centrifugal force to move to the outer peripheral side. However, while the foreign matter swirls downward from the upper part of the first swivel chamber 15, the second swivel chamber 19 When it is moved to, the force due to gravity is also combined, and even after the foreign matter moves to the second turning chamber 19, it can be quickly moved to the lower part of the second turning chamber 19 by the inertial force and gravity due to turning. This effect is most apparent at the position in the present embodiment. Further, in order to allow a large amount of foreign matter to be stored in the second swivel chamber 19, it may be better to position the through hole 21 on the upper side, so that the through hole 21 is arranged above the central axis 4.

As shown in FIG. 5, it is desirable that the second shielding member 23 is arranged at the uppermost portion of the second swivel chamber 19. If it is the uppermost part, it is the uppermost part of the circular space dividing plate, so that the space dividing plate is inclined downward on both surfaces of the second shielding member 23, and it becomes difficult for foreign matter to accumulate.

If the foreign matter enters the first swivel chamber 15 from the second swivel chamber 19 through the through hole 21, the foreign matter collides with the side surface of the cylindrical member 14 when moving from the through hole 21 toward the central axis. This makes it difficult to flow directly into the cylindrical tube 5. The vicinity of the central axis in the first swirl chamber 15 is a swirling flow toward the cylindrical tube 5, but the cylindrical member 14 acts as a barrier, and foreign matter flowing in from the through hole 21 directly enters the swirling flow near the central axis. It prevents foreign matter from entering and prevents foreign matter from scattering downstream.

Further, the foreign matter in the second swivel chamber 19 is often present near the second air supply port 10 due to gravity. However, since air flows in from the second air supply port 10, the foreign matter soars up, but at that time, the foreign matter moves to the through hole 21 side (left side in FIG. 5) and moves from the through hole 21 to the first swivel chamber 15. The first shielding member 22 restricts the movement of foreign matter so that it does not flow in. As a result, foreign matter that has been blown up by the air flowing in from the second air supply port 10 is prevented from flowing into the first swivel chamber 15 from the through hole 21.

This ventilation port hood can discharge the separated foreign matter to the outside again, so maintenance is not required. This is because, as described above, the foreign matter once separated and stored in the second swivel chamber 19 is discharged to the outside from the second air supply port 10 by the natural wind, so that the foreign matter may continue to accumulate in the ventilation port hood. Absent.

As shown in FIG. 3, the cylindrical tube 5 has an end portion in the cover 2 extending into the space dividing plate 13. That is, the cylindrical pipe 5 which is the outlet, the first swirl chamber 15 which is the swirl chamber, and the second swivel chamber 19 which is the separation chamber (dust collection chamber) overlap at the same time. This makes it possible to have a compact configuration.

Further, since foreign matter and water droplets cannot flow into the cylindrical tube 5 in a straight line from the first air supply port 8, it is difficult for foreign matter and water droplets to scatter downstream of the ventilation port hood, that is, it is compact and has good separation performance. ..

The cylindrical member 14 prevents foreign matter flowing from the second swivel chamber 19 through the through hole 21 into the first swivel chamber 15 into the cylindrical tube 5, and suppresses deterioration of separation performance. The flow of the airflow in the through hole 21 is a mixture of both the flow from the first swivel chamber 15 to the second swivel chamber 19 and the flow in the opposite direction, but the flow flowing into the first swivel chamber 15 side is mainly. , It occurs near the fixing plate 16 side. Therefore, even if the foreign matter flows into the first swivel chamber 15, it bounces off by colliding with the cylindrical member 14, is swept by the swirling flow in the first swivel chamber 15, and receives centrifugal force by swirling again. Since it can be moved from the through hole 21 to the second swivel chamber 19, deterioration of the separation performance can be suppressed.

Further, in the present embodiment, the upper surface side (cylindrical tube 5 side) of the cylindrical member 14 is provided with four arc-shaped cylindrical blades 17, which has an effect of reducing the pressure loss of the ventilation port hood. The cylindrical blade 17 is inflated so as to receive the swirling flow in the first swirl chamber 15 indicated by the arrow in FIG. As a result, the swirling flow is converted into a flow in the downstream direction by the cylindrical blade 17, and the air flows smoothly downstream, so that the pressure loss is reduced. By visualizing the flow by fluid analysis, the flow of the swirling flow toward the downstream (5 directions of the cylindrical tube) was grasped, and the diameter of the cylindrical member was determined so as to be substantially the same as the diameter. This diameter correlates with the inner diameter of the cylindrical tube 5, and is about 70 to 80%.

The blind plate 9 is located at the upper and lower portions of the first air supply port 8, and the upper blind plate 9 has an effect of suppressing inflow of rain falling from above and foreign matter falling. The lower blind plate 9 has an effect of preventing foreign matter discharged from the nearby second air supply port 10 from flowing in again from the first air supply port 8. In the present embodiment, both blind plates 9 also serve as support plates for connecting the base plate 3 and the cover 2.

The cover 2 has a dome shape on the front side of the ventilation port hood. As a result, the inside of the second swivel chamber 19 is inclined, and the separated foreign matter moves along the inclination and easily collects in the vicinity of the second air supply port 10. Further, since the shape of the second air supply port 10 is vertically long in the central axis direction, the second air supply port 10 is opened in the central axis direction of the second swivel chamber 19. Due to these actions, foreign matter can be efficiently discharged from the second air supply port 10.

The ventilation port hood needs to have a role of suppressing inundation into the indoor side when it rains. As described above, the ventilation port hood in the present embodiment is not connected in a straight line from the end of the cylindrical pipe 5 connected to the room and the first air supply port 8, so that the inflow is suppressed. Further, in the first swirl chamber 15, water droplets move to the outer peripheral side due to the swirling flow and adhere to the wall surface of the space dividing plate 13. Due to these actions, the ventilation port hood has a structure that makes it difficult for rain to enter.

Further, in order to prevent the ingress of water, a water blocking member 25 is provided around the cylindrical member 14. The water droplets adhering to the wall surface of the space dividing plate 13 move downward along the fixing plate 16 due to gravity. At this time, since the water droplets that collide with the water-impervious member 25 move downward along the water-impervious member 25, the dripping water droplets do not reach the cylindrical member 14. Since a flow toward the cylindrical tube 5 is generated in the vicinity of the cylindrical member 14, water droplets adhering to the cylindrical member 14 are likely to scatter into the cylindrical tube 5. By preventing such water droplets from scattering, the water-impervious member 25 can suppress a decrease in the water droplet separation performance.

Further, since the front surface of the ventilation port hood is covered with the cover 2 and there is no opening on the front side, the direct wind does not flow into the room.

With the above configuration, this ventilation port hood has a foreign matter separation function using centrifugal force, has a compact configuration and low pressure loss, and the separated foreign matter is discharged to the outside by the force of natural wind, causing clogging. Since there are no narrow gaps to allow foreign matter to be removed, maintenance work such as removing foreign matter becomes unnecessary.

(Embodiment 2)
The description of the portion having the same configuration / operation as that of the first embodiment will be omitted.

FIG. 6 is an enlarged cross-sectional view of the 25 portion of the impermeable member according to the present embodiment. The water-impervious member 25 in the present embodiment has an inclined surface so that the side surface on the central axis side expands toward the cylindrical pipe 5. As a result, when the water droplets that have entered the inner peripheral side of the impermeable member 25 move downward due to gravity, the water droplets are not accumulated inside the impermeable member 25 and are discharged to the outside of the impermeable member 25 along the inclined surface. Will be done. Therefore, it is possible to prevent water droplets from scattering downstream, and thus it is possible to suppress deterioration of separation performance.

(Embodiment 3)
The description of the portion having the same configuration / operation as that of the first embodiment will be omitted.

FIG. 7 is a front view showing the shape of the impermeable member 25 according to the present embodiment. The impermeable member 25 in the present embodiment has a structure in which a notch 26 is provided at a position located at the lowermost portion in the direction of gravity. As a result, when the water droplets that have entered the inner peripheral side of the impermeable member 25 move downward due to gravity, the water droplets are discharged from the notch 26 to the outside of the impermeable member 25 without accumulating the water droplets inside the impermeable member 25. To. Therefore, it is possible to prevent water droplets from scattering downstream, and thus it is possible to suppress deterioration of separation performance.

The cyclone separation device according to the present invention enables the device to be compactly configured and miniaturized, and to improve the design, while separating foreign substances and returning them to the outdoors and preventing the ingress of wind and rain. Therefore, it is useful as an outdoor hood or the like attached to the ventilation port (air supply side) of the building.

1 Ventilation port hood 2 Cover 3 Base plate 4 Central axis 5 Cylindrical pipe 6 Top surface 7 Side part 8 First air supply port 9 Blind plate 10 Second air supply port 11 Fixed blade 12 Upstream side end 13 Space division plate 14 Cylindrical Member 15 First swivel chamber 16 Fixing plate 17 Cylindrical blade 18 Cylindrical pipe end face 19 Second swivel chamber 21 Through hole 22 First shield member 23 Second shield member 25 Water shield member 26 Notch

Claims (8)

A cover gas flow flows from the side surface, and flows out from the bottom portion,
Wherein the inner peripheral side a central axis of the front Symbol cover, a cylindrical tube having to allow a negative pressure to the inside of the cover through the bottom portion from the inside of the cover,
Forming an outer circumferential side and inner circumferential side each space comprising a first swirl chamber and a second swirl chamber of the cover before Symbol cylindrical tube, the space division plate having a cylindrical shape or truncated cone shape,
A cylindrical member provided in the front Symbol first whirling chamber is opposed to the end surface of the cylindrical tube,
It is a ventilation port hood equipped with
Before SL cover has a top surface portion facing the bottom surface portion, in the side surface portion, a first air supply port provided on the bottom portion side, the second air supply port provided on the top surface side And with
Before Symbol first air inlet is a plurality of openings formed by arranging a plurality of fixed vanes so as to surround the side surface of said cover, communicating with said first swirl chamber,
Before Stories second air supply port in a state of arranging the central axis horizontal, a vertical to the central axis, an opening located at the lowest portion of the side surface portion of said cover, said second pivot Communicate with the room,
Before Symbol space division plate has a through hole communicating with the second swirl chamber and the first swirl chamber,
Position before SL through hole, the distance of the direction of the airflow swirling the first swirl chamber is longer than the distance of the anti-flow direction is taken as a base point the second air supply port at about the central axis Ventilation port hood. Before Symbol space division plate, in the central axis direction, than the first air supply ports disposed in the top face side, the end surface of the cylindrical tube to the inner peripheral side of the space separating plate in the central axis direction is The ventilation port hood according to claim 1 , which is extended. Prior Symbol second whirling chamber, the space division plate, provided the first shielding member provided upright so as to block a portion of the flow path of the second pivot indoor air flow,
Before SL first shielding member, vent hood according to claim 2 which is extended toward the outer periphery from the central axis side in the through-hole side from the line connecting the center axis and the second air supply port. Prior Symbol second whirling chamber, the space division plate, provided the second shielding member provided upright so as to block a portion of the flow path of the second pivot indoor air flow,
Before Symbol The second shielding member, vent hood according to claim 2 or 3 in above the previous SL central axis and extending toward the outer periphery from the central axis side. Vent hood according to claim 1 which are arranged blind plate between one opening and another opening of the first air inlets in the top and bottom of the front Stories cover. Prior Symbol first whirling chamber, wherein the cylindrical member is erected from the wall surface of the top surface side, according to claim 1 provided with a water blocking ring-shaped member that surrounds the outer periphery of the columnar member on the wall surface Ventilation port hood. Before SL water blocking member, vent hood according to claim 6 from the inside of the water blocking member is provided with inclined side surface of the columnar member side so that the water on the outside flows. Before SL water blocking member, vent hood according to claim 6 or 7 provided with a notch at a position of the bottom in the state in which the said central axis horizontally.