JPH05106885A - Ventilating hood - Google Patents

Abstract

PURPOSE:To improve an anti-surrounding air performance without causing a supplying air flow and an air discharging flow to be reversed at a slow surrounding air speed in the case that a plurality of ventilating hoods are used to perform a concurrent air supplying and air discharging operation. CONSTITUTION:A small dust 17 having a square shape of desired size is projected at a duct connection part 15 having a fixing resilient member 16 installed at an outer wall, and a larger duct 19 than a width of the small duct 17 by 30% to 50% is cooperatively arranged to the small duct 17. A side wall of the larger duct 19 is provided with a ventilation port 21 where a gallery 23 is installed. The surrounding air stream flows from a lower part to an upper part over a side surface of the small duct, an air flowing passage is formed to cause an entire smooth air flow to be attained, resulting in that a reversing of the air supplying flow and the air discharging flow may not be produced up to a relative high surrounding air speed under a concurrent air supplying and air discharging operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation hood installed on a wall surface of a house and used for supplying and exhausting air in a room.

[0002]

2. Description of the Related Art Conventionally, as a ventilation hood of this type, FIG.
As shown in FIG. 2, a duct pipe 3 is fitted on the wall surface 2 of the house 1, and a duct body 5 fixed inside the duct pipe via an elastic member 4 is provided continuously with a net body 6 and It is known to have a spherical hood 8 having an airflow space 7. (For example, JP-A-2-247437.
(See the official gazette).

[0003]

In the conventional ventilation hood as described above, when a pair of hoods 8 are provided on the wall surface 2 and used in combination with a blower (not shown) for air supply and exhaust, it is shown in FIG. Exhaust volume characteristics from exhaust hood B9
And the air supply amount characteristic B9a from the air supply hood are relatively small at the outside wind speed A, the reverse of the exhaust air / air supply occurs, and there is a problem that the outside wind resistance performance is poor.

Further, since the hood 8 is formed of a steel plate, there is a problem that wind noise, rain water drop noise, etc. are large.

Further, since the hood 8 is not equipped with a fireproof equipment such as a fireproof damper, there is a problem that the spread of fire cannot be prevented.

The present invention has been made to solve the above problems, and the exhaust flow and the supply air flow do not reverse at a small outside wind speed, the outside wind resistance is good, the noise is low, and the fire spreads. The purpose is to obtain an easy-to-use ventilation hood.

[0007]

A ventilation hood according to the present invention includes a wall surface of a house, an opening provided in the wall surface, a duct connecting portion fixed to the opening through an elastic member, and the duct. In a ventilation hood including a hood connected to a connection part, the hood is connected to the duct connection part from the wall surface and has a small duct protruding by a predetermined dimension, and the small duct has a width of 30% or more from the small duct width. A large duct having a wide width is continuously provided, and a ventilation port is formed in a side wall facing the large duct.

Further, the upper surface of the hood is inclined so that the leading end side of the large duct is low, and the lower surface is formed horizontally.

Further, one end of the duct connecting portion is superposed on the outer wall of the small duct, and a soundproof material is mounted on the upper surface of the hood.

A pair of hoods for ventilation and exhaust are attached to the wall surface, a gallery is attached to the ventilation port of the exhaust hood, and the ventilation port of the air supply hood is opposed to the exhaust hood. Is sealed, and the other is equipped with an insect screen.

Further, a fire damper is provided in the hood.

[0012]

According to the present invention, a wall surface of a house or the like, an opening provided in the wall surface, a duct connecting portion fixed to the opening via an elastic member, and a hood connected to the duct connecting portion. In the ventilation hood, the hood is connected to the duct connecting portion from the wall surface, and has a small duct protruding by a predetermined size, and the small duct has a width of 30% of the small duct width.
By connecting a large duct with a wide width as described above and forming ventilation openings in the opposite side walls of this large duct, the airflow from the ventilation opening and the airflow that hits the wall surface from the outside are below the side wall surface of the small duct. Flows upward from.

Further, since the upper surface of the hood is inclined so that the tip side of the large duct is low and the lower surface is formed horizontally, rainwater and the like flow from the small duct side to the large duct side of the hood, and at the same time, the lower surface. At, the water is drained downward and dropped.

Further, since one end of the duct connecting portion is superposed on the outer wall of the small duct and a soundproof material is attached to the upper surface of the hood, rainwater can infiltrate into the inside from the connecting portion between the duct connecting portion and the small duct. Instead, the water is drained from the duct connection part and dropped, and the wind noise and water noise are absorbed by the soundproof material.

A pair of hoods for ventilation and exhaust are attached to the wall surface, a gallery is attached to the ventilation port of the exhaust hood, and the ventilation port of the air supply hood is opposed to the exhaust hood. Since the other side is sealed and the other side is equipped with an insect repellent net, the exhaust flow flows in a predetermined direction in the gallery without a short circuit to the ventilation port of the air supply hood, and the air supply air is supplied through the insect repellent net. Is fed into the food hood.

Since the fireproof damper is provided in the hood, the fireproof damper is operated at a predetermined temperature.

[0017]

【Example】

Example 1. 1 to 9 are views showing a first embodiment of the present invention, in which 10 is a wall of a house 11, 12 is an opening bored in this wall, 13 is a pipe provided in this opening, For example, it is made of PVC pipe. Reference numeral 14 is a ventilation hood attached to this pipe, and 15 is a duct connecting portion forming one side of this ventilation hood, which has a cylindrical shape to be inserted into the pipe 13. Reference numeral 16 denotes an elastic member mounted on the outer wall of the duct connecting portion, one of which is embedded in the outer wall and the other of which is projected and engaged with the inner wall of the pipe 13. Reference numeral 17 denotes a small duct in the hood 18 forming the other side of the ventilation hood 14, which is a box body connected to the duct connecting portion 15 and formed to be larger than the duct connecting portion 15. The duct connecting portion 15 is connected to the pipe 13. When mounted, it is dimensioned so as to project from the surface of the wall 10 by a predetermined dimension. It should be noted that one end of the duct connecting portion 15 is superposed on this small duct to prevent rainwater from entering the inside from the connecting portion between the duct connecting portion 15 and the small duct 17 and to improve drainage.
Reference numeral 19 denotes a large duct, which is connected to the small duct 17 and is formed to have a dimension L2 which is wider than the width L1 of the small duct 17 by about 30% to 50% as shown in FIG. It consists of a box. The large duct has an upper surface that is inclined so that the end portion 20 is low to facilitate draining, and the lower surface is horizontal so that birds and the like do not form a nest. 21 is a side wall 22 of the large duct 19 which faces
The ventilation port 23 formed in the gallery is a gallery attached to the ventilation port, and is arranged with a downward inclination as shown in FIG. 6, and the airflow flows downward. 24 is also the ventilation port 21
An insect repellent net attached to the hood prevents the insects, birds, and the like from entering the hood 18, for example, made of synthetic resin. Reference numeral 25 is a kitchen in the house 11, and 26 is an exhaust ventilation fan arranged in the kitchen, which is, for example, a range hood fan.
Exhaust of oily smoke and the like. Reference numeral 27 denotes an air supply ventilation fan that secures air supply to the exhaust air ventilation fan, which is, for example, an intermediate attachment type ventilation fan, and is installed in the middle of the pipe 13.
Reference numerals 28 and 29 denote exhaust amount characteristics A and supply amount characteristics A and 32 of the ventilation hood 14 according to the present invention, and shielding plates for sealing the ventilation port 21 to prevent a short circuit of the adjacent ventilation hood 14. 33 is the ceiling of the house 11.

In the ventilation hood constructed as described above, an exhaust ventilation fan 26 is arranged in the kitchen 25 of the house 11 as shown in FIGS. 5, 6 and 7, and the exhaust ventilation fan 26 is used for exhaust and An air supply pipe 13 is connected, and the pipes 13 and 13 are piped so that the tips of the pipes 13 and 13 face the outside at an opening 12 of the wall 10. An air supply ventilation fan 27 is attached to the middle of the air supply pipe of the pipe 13. Next, at the tip of each pipe 13, 13, the exhaust pipe 1
Ventilation hood 1 having gallery 23 at both ventilation ports 21 at 3
4, the ventilation pipe 21 facing the ventilation hood 14 of the exhaust pipe in the air supply pipe 13, a shield plate 32 in the ventilation port 21, and the ventilation hood 14 having the insect net 24 in the other ventilation port 21 via the elastic member 16. Mounting. And the exhaust ventilation fan 26,
By operating the air supply ventilation fan 27, the simultaneous air supply / discharge operation is performed. In this case, as shown in FIG. 8, in the conventional ventilation hood, the exhaust amount characteristic B9 and the supply air amount characteristic B9a intersect at a comparatively small outside wind speed A, that is, a reverse phenomenon of supply and exhaust occurs.
On the other hand, in the ventilation hood 14 of the present invention, the air flow for supply / exhaust is generated in the direction of the ceiling 33 from the lower side in the small duct 17 as shown in FIGS. The flow of the outside wind becomes smooth in the direction of the duct 19, the intersection of the exhaust amount characteristic A28 and the supply amount characteristic A29 is deviated, and the reversal of the supply / exhaust flow does not occur even at a higher outside wind speed.

Example 2. Further, as shown in FIG. 10, by installing the soundproof material 40 made of synthetic resin on the upper surface of the large duct 19, the wind noise in the ventilation hood 14 and the water noise to the large duct 19 are absorbed, and the sound deadening effect is obtained. Be done.

Example 3. Further, as shown in FIG. 11, a fireproof damper 50 having a structure to be described later is internally provided so as to be located inside the small duct 17 from the duct connecting portion 15. That is, a weight 53 is attached to one end of a damper plate 52 rotatably supported on the side wall of the cylindrical frame 51, and a temperature fuse 54 that is melted at a predetermined temperature is attached to the other end. The ends are engaged and the damper plate 52 is held horizontally. Then, the damper plate 52 is rotated by the weight of the weight 53 by melting and dividing the temperature fuse 54, and seals the inside of the cylindrical frame 51. As a result, fire and smoke can be prevented from advancing due to fire, and fire prevention measures can be taken.

[0021]

As described above, according to the present invention, the wall surface of a house or the like, the opening provided in the wall surface, the duct connecting portion fixed to the opening via the elastic member, and the duct connecting portion are provided. In a ventilation hood including a continuous hood, the hood is connected to the duct connection part from the wall surface and has a small duct protruding by a predetermined size, and the small duct has a width 30% or more wider than the small duct width. By connecting a large duct in series and forming ventilation holes on the opposite side walls of this large duct, the airflow flows through the concave portion formed by the width dimension difference between the small duct and the large duct, and outside the wall surface. When the ventilation hood is installed, the flow of outside air around the ventilation hood is improved, and the ventilation performance including air supply / exhaust of the ventilation hood is improved.

Further, since the upper surface of the hood is inclined so that the front end side of the large duct is low, and the lower surface is formed horizontally, the upper surface of the hood is well drained, and birds, insects and the like form a nest on the lower surface. Product performance is improved because it cannot be made.

In addition, since one end of the duct connecting portion is superposed on the outer wall of the small duct and a soundproof material is attached to the upper surface of the hood, rainwater or the like is flooded inside the connecting portion of the duct connecting portion and the small duct. The noise can be prevented, and the noise generated in the hood and the outer wall is reduced by the soundproof material.

A pair of hoods for ventilation and exhaust are attached to the wall surface, a gallery is attached to the ventilation port of the exhaust hood, and the ventilation port of the air supply hood is opposed to the exhaust hood. Since the other side is sealed, and the other side is equipped with insect repellent nets, the ventilation hood does not have a short circuit in the exhaust hood, and the air supply hood can simultaneously supply and discharge without foreign matter entering. The reverse action of the exhaust flow and the supply air flow due to the outer shape of the ventilation hood does not occur even if the external wind speed increases.

Further, since the fire damper is provided in the hood, the progress of flame, smoke, etc. in the fire is prevented, and the safety is further improved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a mounting side view showing the first embodiment of the present invention.

FIG. 3 is a mounting plan view showing the first embodiment of the present invention.

FIG. 4 shows Embodiment 1 of the present invention, in which a is a side view, b is a plan view, and c is a front view.

FIG. 5 is a perspective view showing an operating state of the first embodiment of the present invention.

FIG. 6 is a front view showing the operating state of the first embodiment of the present invention.

FIG. 7 is a layout view showing the installation in the house according to the first embodiment of the present invention.

8 is a graph showing Embodiment 1 of the present invention and showing characteristics of an air supply flow and an exhaust flow in FIG. 7. FIG.

FIG. 9 is a side view of a ventilation hood having a fire screen according to the first embodiment of the present invention.

FIG. 10 is a mounting side view showing a second embodiment of the present invention.

FIG. 11 shows Embodiment 3 of the present invention, in which a is a sectional view of a ventilation hood having a fireproof damper and an insect screen, and b is a sectional view of a ventilation hood having a fireproof damper and a gallery.

FIG. 12 is a mounting cross-sectional view showing a conventional ventilation hood.

[Explanation of symbols]

 10 Wall 11 House 12 Opening 14 Ventilation Hood 15 Duct Connection 16 Elastic Member 17 Small Duct 18 Hood 19 Large Duct 21 Ventilation Port 23 Gallery 24 Insect Net 40 Soundproofing Material 50 Fire Damper

Claims (5)

[Claims] 1. A ventilation comprising a wall surface of a house or the like, an opening provided in the wall surface, a duct connecting portion fixed to the opening via an elastic member, and a hood connected to the duct connecting portion. In the hood, the hood is connected to the duct connecting portion from the wall surface, and a small duct protruding by a predetermined dimension and a large duct having a width 30% or more wider than the small duct are connected to the small duct. Ventilation hood, which is characterized in that ventilation openings are provided in opposite side walls of the large duct. 2. The ventilation hood according to claim 1, wherein the upper surface of the hood is inclined so that the tip side of the large duct is low, and the lower surface is horizontal. 3. The ventilation hood according to claim 2, wherein one end of the duct connecting portion is superposed on an outer wall of the small duct, and a soundproof material is attached to an upper surface of the hood. 4. A pair of hoods for ventilation and exhaust are attached to the wall surface, a gallery is attached to the ventilation port of the exhaust hood, and the ventilation port of the air supply hood is opposed to the exhaust hood. The ventilation hood according to claim 3, wherein is sealed and the other is fitted with an insect screen. 5. The ventilation hood according to claim 1 or 4, wherein a fire damper is provided in the hood.