JPH02118351A - Outdoor hood for ventilation fan - Google Patents

Abstract

PURPOSE:To improve air-tightness or a housing and a sound insulating characteristic by a method wherein a lower surface opening of a hood is closed by a shutter when operation of a ventilation fan is stopped. CONSTITUTION:A wall surface opening 50 is formed in a building wall 51, a hood 1 is arranged to cover the wall surface opening 50, and a lower surface of the hood 1 is formed with an opening 7. Supporting points 2 are arranged at both right and left ends of the opening 7, and a shutter 31 is rotatably arranged around the supporting points 2 so as to open or close the opening 7. Although an opening or closing unit 4 for use in opening or closing the shutter 31 is arranged within the hood 1, this opening or closing unit 4 is made such that a geared motor, a clutch and a winding-up device 8 are integrally assembled. As a power supply is fed to this opening or closing unit 4, the geared motor is rotated to cause the winding-up device 8 to be rotated in a direction A through a clutch, a connecting rod 5 is pulled up to cause the shutter 31 to be rotated in the direction A and then the opening 7 of the hood 1 is released.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an outdoor hood for a wall-mounted ventilation fan used mainly in homes.

Prior Art A conventional outdoor hood for a ventilation fan was installed as shown in FIG. That is, the outdoor hood 52 is attached to the outdoor 1o1 side of the wall 61, covering the wall opening 6o and forming an opening 56 on the lower surface.

On the other hand, a ventilation fan 63 is attached to the wall opening 60 from the indoor 100 side, and air 110 from the indoor 100 is discharged outdoors as shown by an arrow 111 through the ventilation fan 63 through the outdoor hood 62. Further, as shown in FIG. 7, a damper 64 is provided inside the outdoor hood 62, and when the temperature of the air passing through the hood 62 rises abnormally in the event of a fire, the temperature fuse 56 made of low-temperature melting alloy is blown and the opening 56 is closed. Outdoor hoods with dampers that close the damper 64 to prevent the spread of fire to houses were also used in fire prevention areas.

Problems to be Solved by the Invention In such a conventional configuration, since the opening 66 on the bottom surface of the outdoor hood 52 remains open, the attached ventilation fan 5
Even if No. 3 is equipped with a shutter at the rear of the frame, cold air can enter the room at 10° in winter through the gap between the shutter and the frame when the ventilation fan 63 is stopped, and the soundproofing is not sufficient. The opening 6 of the outdoor hood 52 remains open further.
Birds may build nests in the area 6, which is unfavorable in terms of environmental hygiene.
The problem was that the appearance of the building was not good because of the visibility.

By the way, conventionally, a ventilation fan has been devised in which a cover is attached to the back of the ventilation fan body, covering the discharge port and opening at the bottom, and a shutter is provided in the opening to be opened by wind pressure.
In such a configuration, if there is any object directly below the installation location of the ventilation fan, the object becomes an obstacle and prevents the shutter from opening, making it impossible to arbitrarily set the installation location of the ventilation fan. In addition, when the outside wind was strong, the shutter acted as a guide plate, causing a headwind to blow into the ventilation fan, resulting in a reduction in air volume.

Furthermore, when a fire prevention damper 54 is provided as shown in FIG. It stuck to the hood 62 and did not release under the weight of the damper 64, so it sometimes did not operate in the event of an emergency.

Furthermore, it is not easy to install a power outlet for the ventilation fan 63 on the wall, and if it is not desirable for the aesthetics of the room 100, there is also the problem that it is difficult to supply power.

The present invention solves these problems by preventing outside air from entering when the ventilation fan is stopped, improving the airtightness and soundproofing of the house, and maintaining environmental hygiene by preventing birds from building nests. In addition, it improves the appearance of the building, allows the installation location to be selected arbitrarily, does not adversely affect the performance of the ventilation fan, and furthermore, in the event of an abnormality such as a fire, the shutter closes securely and blocks the ventilation path. To provide an outdoor hood for a ventilation fan that can easily supply power to the ventilation fan without spoiling the aesthetic appearance of the room.

Means for Solving the Problem The first means of the present invention for solving this problem is to provide a hood on the outside of the wall opening room that covers the opening and has an open bottom surface, and a hood provided at both left and right ends of the opening of the hood. A shutter rotatably arranged around a fulcrum, a switch having a motor and a winding mechanism for opening and closing the shutter,
The outdoor hood for a ventilation fan includes a connecting rod that connects the shutter and the switch, and a spring that biases the shutter in the closing direction.

A second means is to configure the shutter with a plurality of shutter plates, each of the shutter plates has a thin wall portion that closely contacts each other at the edges that overlap each other when closed, and the shutter plate is provided at the hood opening end. It has ribs that overlap the edges of the board.

The third means has a structure in which a plurality of shutter plates are supported at one end on a fulcrum provided in the lower opening of the hood, and the other end is rotated in conjunction with the inside of the hood to open the shutter plate. be.

The fourth means is constructed by connecting the connecting rod and the shutter via a temperature fuse made of a low-temperature melting alloy.

The sixth means has a configuration in which a power supply connection terminal to which a power supply and a switch are connected is provided inside the hood, and a connector connected to this power supply connection terminal to supply power to the ventilation fan.

Effect: According to the first means described above, at the bottom opening of the hood, the shutter opens to provide ventilation when the ventilation fan is in operation, and closes when the ventilation fan is stopped to prevent outside air and outdoor noise from entering the room. This prevents birds from building nests inside the hood, and also blocks the ventilation fan from being seen through the hood from outside.

By the second means, the plurality of shutter plates are in close contact with each other at the thin-walled edges of the hood and overlap each other, and the edge of the shutter plate on the open end side of the hood is formed by a rib provided at the open end of the hood. This overlaps with υ, increases the insulation between indoors and outdoors, and improves airtightness.

By the third means, the shutter plate is rotated inward to open the hood, so even if there is something directly under the hood, it will not interfere with the opening/closing operation.

According to the fourth means, the temperature fuse blows out in the event of an abnormality such as a fire, and the shutter is forcibly closed by a spring.
This will ensure that the ventilation path is blocked.

By means of the sixth means, power supply to the ventilation fan can be achieved by simply connecting the power cord of the ventilation fan to the connector inside the hood without having to install an outlet on the wall, and the operation of the ventilation fan and the shutter The opening and closing of will be synchronized.

Example Hereinafter, one embodiment of the present invention will be described based on FIG.

Note that the same elements as in the conventional example are given the same reference numerals. In the figure, a wall opening 60 is provided in a wall 61 of a building, a hood 1 is attached to cover the wall opening 60, and the lower surface of the hood 1 is formed with an open lower part. A fulcrum 2 is provided at both left and right ends of the opening lower, and a shutter 31 is attached rotatably about the fulcrum 2 to open and close the opening lower. A switch 4 for opening and closing the shutter 31 is disposed inside the hood 1. This switch 4 is integrally constructed with a geared motor, a clutch, and a hoisting device 8, and the switch 4 is connected to a power source. When supplied, the gear motor rotates and rotates the winding device 8 in the inward direction via the clutch, pulls up the connecting rod 6, rotates the shutter 31 in the inward direction, and opens the lower opening of the hood 1. . At this time, the attached ventilation fan 53 is operated, and the indoor air 110 passes through the hood 1 and is discharged in the direction of the arrow 111. When the power supply to the switch 4 is stopped, the clutch of the geared motor is released, the winding device 8 is released, and the shutter 31 is closed by the tension of the spring 6 that always biases the shutter 731 in the closing direction.
rotates in the direction B and returns to its original position (double-dashed line), the opening lower portion of the hood 1 is closed, and at the same time, the ventilation fan 63 is stopped.

In this way, since the shutter 31 is closed when the ventilation fan 63 is stopped, it is possible to prevent the outside wind and the noise from the outdoors 101 from entering the indoor room 1oo while the hood 1 is open. It is possible to prevent birds from building nests and maintain good environmental hygiene. Furthermore, since the ventilation fan 63 is shielded by the closed shutter 31, the outdoor 1
01, the ventilation 853 is no longer visible, and the appearance of the building is improved.

Next, a second embodiment of the present invention will be described based on FIG. Note that the same elements as those in the first embodiment are given the same reference numerals, and their explanations will be omitted. (The same applies to the following embodiments.) In the figure, the shutter 32 is composed of a plurality of shutter plates 3A, each of which is supported by a fulcrum 2 provided at both left and right ends of the open lower part of the hood 1. The connecting rod 10 is rotatably arranged and connected to the connecting pin 12.
It is movably connected to and is provided so as to open and close in conjunction with it.

Further, the shutter plate 3A has a thin wall portion 9 at the edge that overlaps with each other when closed. A rib 11 is formed at the open lower end of the hood 1 and overlaps the edge of the shutter plate 3A. Note that the spring 6 that always biases the shutter 32 in the closing direction is connected between the hood 1 and the connecting rod 1o, and the connecting rod 5 is connected between the switch 4 and the connecting rod 10.

In the above configuration, when the shutter 32 is closed, the respective shutter plates 3A closely overlap at the thin wall portion 9, and at the open lower end, the edge of the shutter plate 3A and the open lower portion of the hood 1 overlap, so that airtightness is further improved. Since the noise level is high, the effect of preventing the intrusion of outside air and outdoor noise 101 is further improved.

Next, a third embodiment of the present invention will be described based on FIG.

In the figure, the shutter 33 rotatably supports one end of each of the plurality of shutter plates 3B at the fulcrum 2,
Connecting bin 12 such that the other end is rotated toward the inside of hood 1.
The connecting rod 10 is movably connected to the connecting rod 10.

In the above configuration, when the shutter 33 is opened and closed, all the shutter plates 3B rotate within the hood 1, so even if there is an obstacle directly below the opening lower part of the hood 1, the shutter plate 3B can be operated without any problem.

Therefore, the installation location of the hood 1 and the attached ventilation fan 53 can be arbitrarily selected, and since the shutter y33 does not protrude outside the hood 1, the outside air is not guided into the hood 1 by the shutter 33, and a decrease in the air volume of the ventilation fan is prevented. There will be no more mistakes.

Next, a fourth embodiment of the present invention will be described based on FIG. 4.

In the figure, the connecting rod 6 connected to the switch 4 is
Connecting rod 1o via temperature fuse 13 made of low temperature melting metal
It is connected to the.

In the above configuration, when the shutter 32 is opened and the ventilation fan 63
If a fire breaks out indoors at 10oC while the machine is being operated, the temperature fuse 13 will melt due to the abnormally high temperature air.
The shutter 32 is closed by the tension of the spring 6, blocking the fire from blowing out into the outdoor area 1o1 and preventing the spread of the fire.

At this time, the shutter 32 is forcibly closed by the spring 6, so even if oil dust adheres to the shutter plate 3B in a sticky manner, the shutter 32 will operate valiantly and close in the event of an abnormality.

Next, a fifth embodiment of the present invention will be described based on FIG.

In the figure, a power supply connection terminal 16 is fixed to the inner surface of the hood 1, and a power supply wire 18 embedded in the wall or the like is connected to the input side of the power supply connection terminal 16, and the output side is connected to the switch 4. It is connected by a cord 16 and also connected to a connector 17. This connector 17 uses a commonly used wall outlet, and can supply power to the ventilation fan 63 by plugging in the power cord 20 of the ventilation fan 53. These power supply connection terminals 16 and connectors 17 are housed in one cover 19.

With the above configuration, when it is difficult to install a power outlet for the ventilation fan 63 on the wall of indoor 1oO, or when you do not want to install an outlet on the wall to maintain the beauty of the interior, you can easily connect the ventilation fan 53 and the switch 4. This means that power can be supplied to the Further, since power is supplied to the ventilation fan 53 and the switch 4 from the same output of the power supply connection terminal 16, the operation of the ventilation fan and the opening/closing operation of the shutter 31 are reliably performed in synchronization.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, the opening at the bottom of the hood is closed by a shutter when the ventilation fan stops operating, thereby preventing outside air and outdoor noise from entering the outdoors. This not only improves the airtightness and soundproofing of the house, it also prevents birds from building nests inside the hood to maintain environmental hygiene.The closed shutter also blocks the ventilation fan from being seen from outside. By improving the appearance of the building, by making the overlapping edges of the shutter plates stick together with the thin-walled parts, and by overlapping the edges of the shutter plates and the ribs at the opening end of the hood,
The airtightness and soundproofing of the house will further improve.

In addition, since the shutter plate rotates inside the hood to open and close, the opening and closing operations are not hindered by objects near the hood installation location, so the hood installation location can be selected arbitrarily. Since the shutter plate does not leak out to the outside of the hood, the shutter plate receives the outside wind directly and acts as a guide plate.9 This eliminates the possibility of drawing back wind into the hood and reducing the air volume of the ventilation fan, which also prevents the occurrence of fires. In the event of an abnormality, the shutter is forcibly closed by the spring after the temperature fuse blows.
In an emergency, the shutter can reliably block the ventilation path to prevent the spread of fire.In addition, by connecting the power cord of the ventilation fan to the connector inside the hood, you can connect the power supply to the shutter opener and the ventilation fan to the wall of the room. Various effects can be obtained, such as being able to easily supply power when it is difficult to provide an outlet for supplying power, or when it is not desired to provide one to maintain the aesthetics of the room.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view (2) showing an outdoor hood for a ventilation fan according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view of the second embodiment, and FIG.
FIG. 4 is a sectional view showing an outdoor hood for a ventilation fan according to the fourth embodiment, FIG.
The figure is a sectional view of a conventional outdoor hood for a ventilation fan, and FIG. 7 is a sectional view of another conventional outdoor hood for a ventilation fan. 1...Hood, 2...Fulcrum, 3A, 3
B... Shutter plate, 4... Switch,
6... Connection rod, e... Spring, 7... Opening, 8... Winding device,
9... Thin wall part, 11... Rib, 13.
... Temperature fuse, 16 ... Power supply connection terminal, 17 ... Connector, 31, 32. 33 ... Name of group/shutter agent Patent attorney Shige Takashi Awano
1 other person t・--Two V 2・- Support 7 se 1 4- Open-open ゑ 7- Open 0 8-Group 3 to-1 I bale 2 fl--- Rib diagram diagram

Claims (5)

[Claims] (1) On the outside of the wall opening room, there is a hood that covers the opening and opens at the bottom, a shutter that is rotatable around a fulcrum provided at both left and right ends of the hood, and a motor that opens and closes the shutter. and an outdoor hood for a ventilation fan, comprising a switch having a hoisting device, a connecting rod connecting the shutter and the switch, and a spring biasing the shutter in the closing direction. (2) The shutter consists of a plurality of shutter plates, each of which has a thin wall portion that closely contacts each other at the edges that overlap each other when closed, and the edge of the shutter plate at the end of the hood opening. The outdoor hood for a ventilation fan according to claim 1, further comprising a rib that overlaps with the rib. (3) The ventilation fan according to claim 1 or 2, wherein the plurality of shutter plates have one end supported on a fulcrum provided in a lower opening of the hood, and the other end rotated in conjunction with the inside of the hood to open the shutter plate. outdoor hood. (4) Claim 1, 2 or 3, wherein the connecting rod and the shutter are connected via a thermal fuse made of a low-temperature melting alloy.
Outdoor hood for the ventilation fan listed. (5) Claim 1 or 2 or 3 or 4, wherein the hood is provided with a power supply connection terminal to which a power supply and a switch are connected, and a connector connected to this power supply connection terminal to supply power to the ventilation fan.
Outdoor hood for the ventilation fan listed.