JP6906139B2 - Ventilation port hood - Google Patents

Description

The present invention relates to a ventilation port hood attached to an air intake of an outdoor wall of a building 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.

In order to prevent wind and rain from entering the room through ducts when performing so-called air supply that takes in outdoor air into the room, a hood is provided at the ventilation port, which is the air intake port on the outer wall of the house, to prevent the intrusion of wind and rain. Is generally performed, and a hood as in Patent Document 1 is used as an example.

At this time, foreign substances such as insects invade the room at the same time. Therefore, in Patent Document 1, a net or the like is provided in the ventilation port hood to prevent the invasion of foreign substances.

However, if a net or the like is used, foreign matter causes clogging, and if maintenance is not performed, the ventilation air volume will decrease. Therefore, there is also a ventilation port hood that applies cyclone technology that does not cause clogging as in Patent Document 2. be. In this method, outside air flows in from the inflow port, a swirling airflow is generated by the fixed blades provided at the inflow port, a through hole is provided on the wall surface of the swirl chamber to penetrate the separation chamber, and the centrifugal force due to the swirl causes the through hole to penetrate. Foreign matter is moved and accumulated in the separation chamber, and the air from which the foreign matter has been removed flows out from the outlet and is supplied to the room.

In any of the above, a blower is arranged on the downstream side of the ventilation port hood, and the ventilation port hood and the blower are connected by a duct to take in air into the room.

Japanese Unexamined Patent Publication No. 2011-242081 Japanese Unexamined Patent Publication No. 2008-36579

In such a ventilation port hood used for air supply, since the blower is arranged on the downstream side of the ventilation port hood, the inside of the ventilation port hood has a negative pressure lower than the surrounding outside air. Therefore, air flows into the inside through the opening of the ventilation port hood.

In a ventilation port hood to which a function of separating foreign matter is added by using a cyclone technique as in Patent Document 2, if there are many gaps in the separation chamber for separating foreign matter, outside air invades and penetrates from there. A flow is generated through the hole to the outlet. Since this flow is in the direction opposite to the direction in which the foreign matter moves from the swivel chamber to the separation chamber, it hinders the foreign matter from moving to the separation chamber, and the foreign matter enters the chamber from the outlet without being separated.

Therefore, an object of the present invention is to provide a ventilation port hood that prevents outside air from flowing into the separation chamber, suppresses deterioration of separation performance, and is easy to assemble while using a cyclone technique.

In order to achieve this object, the ventilation port hood according to the present invention has a cover that covers the top surface, a base plate that closes the bottom surface, and an inflow port through which outdoor air flows between the cover and the base plate. It is configured to have a substantially cylindrical shape inside. The ventilation port hood is provided through a space dividing plate that divides the internal space of the cover into a swivel chamber on the inner peripheral side and a separation chamber on the outer peripheral side, and a space dividing plate that communicates with the swivel chamber and the separation chamber. A through hole, an inner cylinder pipe that penetrates the base plate and communicates between the swivel chamber and the outside, a discharge port that is provided on the cover and communicates between the separation chamber and the outside, and a discharge port that is provided in the separation chamber and discharges. It is provided with a shielding plate that blocks the inflow of outdoor air from the outlet. The inflow port has a structure for generating a swirling airflow in the swirl chamber, the space dividing plate has a contact surface on the outer peripheral portion on the bottom surface side, and the contact surface is relative to the inner peripheral surface of the cover. It is tilted and is in close contact with the inner peripheral surface of the cover via the packing , thereby achieving the intended purpose.

According to the present invention, the separation chamber is surrounded by the spatial division plate and cover space, because the filled gap by packing between the contact surface and the cover, spatial division plate and cover with it is suppressed that the outside air from between the flows into the separation chamber, it is possible to suppress the reduction in separation performance.

In addition, by abutment surface is in the inclined slope increases the contact area between the packing, it is possible to reliably outside air to suppress the flow into the separation chamber.

Further, the abutment surface is inclined, when assembling the vent hood, mosquito or bar packing, inserting a spatial division plate mosquito bar from adhered to either or abutment surface However, regardless of which side is attached, the packing is smoothly fitted due to the effect of inclination, and the airtightness can be easily obtained.

External perspective view of the ventilation port hood according to the first embodiment of the present invention as viewed from the top surface side. Cross-sectional view along the same central axis Enlarged view of part A in FIG.

Vent hood according to the present invention, the inner portion and the substantially cylindrical, covering the top with a cover of the cup-shaped, a vent hood closes the bottom in the base plate, the turning of the inner peripheral side in the cover a space division plate for dividing into the chamber and the outer side of the separation chamber, an inlet which is connected with the bottom surface of the cover, through the base over scan plates, among which is provided in communication with the swivel chamber and the outside comprising a cylinder tube, cover is opened the bottom surface side, has a cup-shaped inner space of closing the top surface side, further, cover may have a discharge port for communicating the separation chamber and the outside and has a shielding plate for shielding the air flow in the vicinity of the exhaust outlet at a separation chamber portion, base over the scan plate is provided so as to close the bottom surface side of the flow inlet, a flow inlet, a swirling airflow to the swivel chamber a structure that can be generated, the inner tube, and extends from the base over the scan plate to swivel chamber, a cylindrical inlet inside the swivel chamber side air flows, the outlet of the external side air flows has, spatial division plate has a through hole for communicating the swivel chamber and minutes Hanareshitsu, a ring-shaped abutment surface on the outer periphery of the bottom surface side, those facing surface is a top surface side It has a conical surface with a small diameter, and the contact surface and the inner peripheral surface of the cover are brought into close contact with each other via packing.

As a result, in the separation chamber which is a space surrounded by the space division plate and the cover, the gap is filled by the packing between the contact surface and the cover, so that the outside air is separated from the space division plate and the cover. The inflow to the space is suppressed, and the deterioration of the separation performance can be suppressed.

Further, since the contact surface is a conical surface, that is, an inclined surface having a small diameter on the top surface side, the contact area with the packing is increased, and the outside air is surely suppressed from flowing into the separation chamber. be able to.

In addition, the inclined contact surface means that when assembling the ventilation port hood, the packing is attached to either the cover or the contact surface, and then the space dividing plate is inserted into the cover. However, in either case, the packing is smoothly fitted due to the effect of inclination, and the airtightness can be easily obtained.

Further, Pa Kkin is affixed to the inner surface of the cover, the bottom surface side of the spatial division plate is provided with a flange portion that projects to the outer peripheral side, the flow inlet flange portion a plurality of plate-like member standing on the bottom surface side, an integral structure as the spatial splitting plate, the outer peripheral end of the flange portion, the contact rib which projects top surface provided, comprising an outer circumferential surface of contact touch ribs and those contact surface It may be configured.

As a result, the gap between the inflow port and the space dividing plate can be eliminated by integrating the inflow port and the space dividing plate. If there is a gap between the inflow port and the space dividing plate, the airflow that passes through the gap is generated without passing through the plate-shaped member part for swirling the airflow, and the swirling airflow inside the swirl chamber. Is weakened, the centrifugal force applied to the foreign matter is weakened, and the separation performance of the foreign matter is lowered. In addition, by integrating the inflow port and the space dividing plate, the extra space can be reduced as compared with the case where the space dividing plate is composed of separate members, which leads to the miniaturization of the ventilation port hood.

And even in such a configuration, when incorporating space division plate became inlet integral with the cover, that the contact touch ribs is inclined a conical surface, the pasted packing cover side Since the packing is gradually pressed down, the packing can be smoothly fitted, the airtightness can be easily obtained, and the deterioration of the separation performance can be suppressed.

Moreover, spatial division plate, so as to have the same inclination direction as the contact surface may be configured to diameter toward the top surface side is frustoconical decreases.

As a result, even if the swirling airflow in the swirling chamber moves away from the inflow port and the flow velocity of the swirling airflow decreases, the diameter of the inside of the swirling chamber becomes smaller toward the top surface side away from the inflow port, so that foreign matter is present. It is possible to suppress a decrease in the centrifugal force applied to the airflow. Thereby, the deterioration of the separation performance can be suppressed.

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

(Embodiment 1)
FIG. 1 is a ventilation port hood 1 according to the present embodiment. Vent hood 1, when capturing the outdoor air in the residential, Metropolitan only be in the air supply port is an inlet of the air in the housing outer wall. Then, a blower is installed in the house, and the blower and the ventilation port hood 1 are connected by using a ventilation duct to take in outdoor air and supply it indoors.

FIG. 1 is a perspective view of the top surface of the ventilation port hood 1, which can be seen from the outdoor side when attached to the outer wall of a house. The central axis 26 is horizontal. FIG. 2 is a cross-sectional view of the ventilation port hood 1. The outflow port 8 is connected to a ventilation duct, and a blower is connected to the downstream side thereof.

Next, the appearance configuration of the ventilation port hood 1 will be described.

As shown in FIG. 2, the ventilation port hood 1 of the present embodiment is attached to the outer wall surface of the house with the central axis 26 substantially horizontal. Then, in the present embodiment, the left side in FIG. 2 is the top surface side of the ventilation port hood 1, and the cover 2 is provided so as to cover the ventilation port hood 1. Top surface On the other hand, the right side in FIG. 2 is the bottom surface side of the ventilation port hood 1, and the base plate 3 is provided. The upper and lower parts of the cover 2 are provided with protruding plates 4 curved along the circular shape of the cover 2 at the top and bottom, thereby connecting the cover 2 and the base plate 3. The internal space created by connecting is cylindrical.

The cover 2 has a rotating body shape formed by rotating around the central axis 26, and has a dome shape protruding toward the top surface. The dome shape is a form of a cup shape, but the shape of the cover 2 may be a cylindrical shape.

The cover 2 and the base plate 3 are connected via a protruding plate 4. As a result, a gap is provided between the cover 2 and the base plate 3 to form the inflow port 6. The inflow port 6 is configured to be in contact with the base plate 3 on the side surface of the ventilation port hood 1 so that air can flow in substantially the entire circumference 360 degrees around the central axis 26. The part is a shielding part, and air does not flow in.

The inflow port 6 is provided with a plurality of fixed blades 5 which are plate-shaped members arranged obliquely toward the central axis 26 so that the inflow air swirls. In other words, the fixed blade 5 is provided so as to be inclined at a predetermined angle in the same direction with respect to the tangent line of the arc centered on the central axis 26 in the cross section orthogonal to the central axis 26.

As shown in FIG. 1, a discharge port 7 is provided in a portion located at the lower part of the cover 2.

Next, the configuration inside the ventilation port hood 1 will be described with reference to FIG.

The inside of the cover 2 is divided into a swivel chamber 10 and a separation chamber 11 by a space dividing plate 9, and the separation chamber 11 has a structure that surrounds the swivel chamber 10 in an annular shape. The space dividing plate 9 is provided with a through hole 12, and the swivel chamber 10 and the separation chamber 11 are spatially connected via the through hole 12.

In the space dividing plate 9, the cross-sectional area (vertical surface to the central axis 26) of the swivel chamber 10 becomes smaller from the end on the inflow port 6 side, that is, the end on the fixed blade 5 side toward the top surface side of the cover 2. It has an inclined truncated cone shape, and the space formed in the gap between the space dividing plate 9 and the cover 2 is the separation chamber 11.

Further, as shown in FIG. 2, the base plate 3 is provided with a circular opening at the center so as to be coaxial with the central axis 26, and a cylindrical inner tube 13 is provided so as to penetrate the opening. There is. The inner side of the ventilation port hood 1 of the inner cylinder pipe 13 is an inner cylinder inlet 14 through which air flows into the inner cylinder pipe 13, and the outer side is an outflow outlet 8 through which air flows out. In the cross-sectional view of FIG. 2, the inner cylinder inlet 14 extends in the central axis 26 direction to a position where it overlaps with the space dividing plate 9 when viewed in the vertical direction of the paper surface.

The discharge port 7 is an opening provided on the side surface of the cover 2 so that the central axis 26 is located at the lower part in the direction of gravity in the horizontal state. The discharge port 7 is a rectangular opening long in the direction of the central axis 26, and the outside and the separation chamber 11 are spatially connected.

The separation chamber 11 is provided with a lower shield plate 15 and an upper shield plate 16, a plurality of lower shield plates 15 are provided near the discharge port 7 on the through hole 12 side, and the upper shield plate 16 is located at the upper part in the gravity direction. I am preparing for it. The lower shielding plate 15 and the upper shielding plate 16 are provided in the separation chamber 11 radially around the central axis 26. It should be noted that these shielding plates do not completely block the separation chamber, and both the lower shielding plate 15 and the upper shielding plate 16 leave a gap between the cover and foreign matter and air. .. A plurality of lower shielding plates 15 are provided between the discharge port 7 and the through hole 12. In the present embodiment, the space dividing plate 9, the plurality of fixing blades 5, the lower shielding plate 15, and the upper shielding plate 16 are integrally configured.

Next, the separation mechanism will be described.

The outdoor air containing foreign matter flows into the ventilation port hood 1 from the inflow port 6, becomes a swirling airflow by the fixing blades 5, and swirls in the swirling chamber 10 while facing the top surface side of the ventilation port hood 1. Here, the foreign matter moves to the outer peripheral side of the swirl chamber 10 by centrifugal force, that is, to the space dividing plate 9 side, and moves to the separation chamber 11 by centrifugal force when passing near the through hole 12. The air separated from the foreign matter flows into the inner cylinder tube 13 and flows out of the device from the outflow port 8.

The foreign matter that has moved to the separation chamber 11 is temporarily stored in the separation chamber 11. Since the pressure inside the ventilation port hood 1 is negative due to the blower, air flows into the separation chamber 11 from the discharge port 7. The air that has flowed into the separation chamber 11 from the outside tries to go to the through hole 12 provided in the space dividing plate 9, but the air flow is blocked by the lower shielding plate 15 and the upper shielding plate 16, and the air flow is blocked from the discharge port 7. Only a small amount will flow in. The small amount of air flows from the separation chamber 11 through the through hole 12 into the swirling chamber 10 and merges with the swirling airflow in the swirling chamber 10.

On the other hand, when a natural wind blows on the outdoor side of the discharge port 7, the static pressure on the outdoor side of the discharge port 7 decreases. Then, when the static pressure on the outdoor side of the discharge port 7 becomes lower than the static pressure on the separation chamber 11 side, the separated foreign matter is pulled out to the outside. As a result, the foreign matter is automatically discharged to the outside, so that the foreign matter does not continue to accumulate in the separation chamber 11, and maintenance for removing the stored matter can be eliminated.

Next, the feature portion in the present embodiment will be described.

FIG. 3 is an enlarged view of a portion A of FIG. 2, which is a view in which a component integrated with the space dividing plate 9 is to be fitted into the cover 2 to which the packing 19 is attached.

The base plate 3 side of the space dividing plate 9 is provided with a flange portion 17 protruding outward, and the fixing blade 5 is erected from the flange portion 17 on the base plate 3 side and is integrated with the space dividing plate 9. Further, a cylindrical contact rib 18 erected toward the top surface side of the ventilation port hood is provided at the outer peripheral end of the flange portion 17. The outer peripheral surface of the contact rib 18 is a contact surface 20 that comes into contact with the packing 19 described later, and the contact surface 20 is a conical surface whose diameter decreases toward the top surface side of the ventilation port hood 1. .. The inclination direction of the contact surface is the same as the inclination direction of the truncated cone-shaped space dividing plate 9.

Then, as shown in FIG. 2, a packing 19 is attached to the inside of the cover 2. The inner diameter of the packing 19 is set to be smaller than the outer diameter of the contact rib 18.

When assembling the ventilation port hood 1 of the present embodiment, the space dividing plate 9 (a part in which the fixing blade 5, the upper shielding plate 16 and the lower shielding plate 15 are integrated) is inserted into the cover 2, and the upper and lower protrusions are projected. It has a structure to be fixed to the plate 4.

Since the outer diameter of the tip side (top surface side of the ventilation port hood) of the contact rib 18 is slightly larger than the inner diameter of the attached packing 19 (the inner diameter of the packing 19 may be the same or smaller), the space dividing plate When the 9 is fixed to the cover 2, the space dividing plate 9 can be easily fitted in the cover 2. Then, when the space dividing plate 9 is further inserted, the packing 19 is gradually crushed along the inclination of the contact surface 20 of the contact rib 18, so that the packing 19 is crushed smoothly and the sealing is maintained firmly. be able to.

Although not shown in the drawings, a wire mesh or the like may be provided at the inflow port 6 in order to prevent large insects from invading from the inflow port 6. That is, a cylindrical wire mesh may be provided so as to cover the inflow port 6. The wire net provided at the inflow port 6 has substantially the same diameter as the inner diameter of the cover 2, and the space dividing plate 9 may be inserted after the wire net is connected to the cover 2 side in advance. In this case, the packing 19 may be attached to the inner peripheral side of the cover 2. That is, when the packing 19 is attached to the space dividing plate 9, the packing 19 needs to have a thickness such that the outer diameter of the packing 19 is larger than the inner diameter of the cover 2. Then, when the space dividing plate 9 is inserted into the cover 2 in this state, the packing 19 provided so as to bulge on the outer peripheral side is caught by the tip of the wire mesh, which makes assembly very difficult. Therefore, the packing 19 may be attached to the cover 2 side. When the packing 19 is attached to the cover 2 side, when the space dividing plate 9 is inserted, the contact surface 20 is an inclined surface, so that the packing 19 can be gradually crushed, which facilitates assembly. Become.

By sealing the space between the separation chamber 11 and the cover 2 with the packing 19 in this way, the communication portion between the separation chamber 11 and the outside can be only the discharge port 7. That is, by limiting the air that the outside air directly flows into the separation chamber 11 to the discharge port 7, it is possible to prevent the through hole 12 from increasing the flow from the separation chamber 11 to the swivel chamber 10, and to separate the through hole 12 from the swivel chamber 10. Since it is possible to prevent the movement of foreign matter to the chamber 11 from being hindered, deterioration of separation performance can be suppressed. Further, since the outside air flowing in from the discharge port 7 is suppressed from flowing toward the through hole 12 by the lower shielding plate 15 and the upper shielding plate 16, it does not affect the separation performance.

That is, since it is possible to suppress the outside air from flowing into the separation chamber 11 through the gap between the space dividing plate 9 and the cover 2, it is possible to suppress the deterioration of the separation performance. Since the contact surface 20 in contact with the packing 19 is a conical surface, the packing 19 can be gradually crushed during assembly, which facilitates assembly and the inclined contact surface 20. Since the packing 19 is firmly pressed down with, the airtightness is also improved.

The ventilation port hood according to the present invention can prevent the outside air from flowing into the separation chamber, suppress the deterioration of the separation performance, can separate foreign substances without causing clogging, and can separate the foreign matter into the room. Since clean air can be supplied to the air supply port, it is useful, for example, as a ventilation port hood attached to an air supply port on the outer wall of a house, or for removing foreign matter in other air supply parts.

1 Ventilation port hood 2 Cover 3 Base plate 4 Protruding plate 5 Fixed blade 6 Inflow port 7 Outlet port 8 Outlet 9 Space division plate 10 Swing chamber 11 Separation room 12 Through hole 13 Inner cylinder pipe 14 Inner cylinder inlet 15 Lower shielding plate 16 Upper shielding plate 17 Flange part 18 Contact rib 19 Packing 20 Contact surface 26 Central axis

Claims (5)

A ventilation port hood that has a cover that covers the top surface, a base plate that closes the bottom surface, and an inflow port into which outdoor air flows between the cover and the base plate, and has a substantially cylindrical shape inside. And
A space dividing plate that divides the internal space of the cover into a swivel chamber on the inner peripheral side and a separation chamber on the outer peripheral side.
A through hole provided through the space dividing plate and communicating the swivel chamber and the separation chamber,
An inner cylinder that is provided through the base plate and communicates between the swivel chamber and the outside,
An outlet provided on the cover and communicating the separation chamber with the outside,
A shielding plate provided in the separation chamber to block the inflow of outdoor air from the outlet,
With
The inflow port has a structure for generating a swirling airflow in the swirl chamber.
The space dividing plate has a contact surface on the outer peripheral portion on the bottom surface side, and has a contact surface.
A ventilation port hood whose contact surface is inclined with respect to the inner peripheral surface of the cover and is in close contact with the inner peripheral surface of the cover via packing. On the bottom surface side of the space dividing plate, a flange portion protruding toward the outer peripheral side and a contact rib protruding toward the top surface side at the outer peripheral end of the flange portion are provided.
The ventilation port hood according to claim 1, wherein the outer peripheral surface of the contact rib is the contact surface. The ventilation port hood according to claim 2, wherein the outer peripheral surface of the contact rib is provided so as to have the same inclination direction as the space dividing plate. The ventilation port hood according to claim 2 or 3, wherein a plurality of plate-shaped members constituting the inflow port are erected on the bottom surface side of the flange portion toward the base plate side. The ventilation port hood according to any one of claims 1 to 4, wherein the space dividing plate has a truncated cone shape whose diameter decreases toward the top surface side.

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