JP3096577B2 - Ventilation openings for buildings - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation hole for a ventilation hole of a building or other general residential building.

[0002]

2. Description of the Related Art Conventionally, a ventilation damper is generally installed in a ventilation hole of a building, and when a pressure difference occurs between the inside and outside of a room due to the use of a ventilation fan or the like, the damper opens and outside air flows into the room. ing.

[0003]

However, in the conventional ventilation damper, when a large pressure difference occurs inside and outside the room, such as when a ventilation fan is used or when a storm occurs, a strong wind flows into the room as it is. There was no vent that had both functions of air volume adjustment and silencing. Therefore, in the present invention, even when a large air pressure difference occurs between the inside and outside of a room, an appropriate constant air volume can be always flowed in, and the outside noise can be prevented from entering the room through the ventilation hole. .

[0004]

According to the present invention, in order to achieve the above object, the ventilation port comprises a constant air volume device and a muffling device. The constant air volume device is pivotally mounted on both front and rear sides on a central axis. An outer cylinder provided with a required number of ventilation holes at regular intervals in the axial direction on the peripheral side, ventilation holes corresponding to the respective ventilation holes of the outer cylinder are provided on the peripheral side, and a pressure receiving plate is provided on the rear side. The inner cylinder is attached to the center axis on both sides so as to be able to slide in the cylinder, and is fitted outside the center axis between the rear end of the outer cylinder and the pressure receiving plate of the inner cylinder. It consists of an adjusting spring that matches each ventilation hole of the cylinder and the inner cylinder,
The inlet of the cylindrical casing is fitted around the outer periphery of the front part of the outer cylinder, the rear end of the central shaft is supported at the casing outlet, and the inside of the casing is between the inlet and outlet. A recess is provided and a sound deadening material is mounted, and a ventilation path is formed between the outer cylinder and the sound deadening material, through which air flowing out of each ventilation hole flows out of a casing outlet.

[0005]

The ventilation port according to the present invention is provided with a constant air volume device as described above, so that if it is attached to the ventilation hole of the building, the air flowing into the inner cylinder from the entrance side will pass through each ventilation hole. It passes through the casing and flows into the room from the outlet along the ventilation path. At this time, since the adjusting spring is bent in the axial direction according to the load of the wind pressure plate, a constant air volume can always flow into the room by automatic adjustment even if the pressure difference between the room and the outside changes. Thus, the air entering the casing is divided into small units of air at each of the small ventilation holes.
Since the vortex generated in the casing is small, low-frequency generated noise which is difficult to muffle is significantly reduced. In addition, since the air purifier is provided with the silencing device as described above, the air flowing out of each ventilation hole is attenuated by the silencing material, passes through the ventilation passage, and flows into the room from the outlet. In addition, if the rotation angle of the inner cylinder can be adjusted by the knob, the ventilation area of the ventilation hole can be adjusted, so that the value of the constant air volume can be changed. Further, when a conical shaped spring is used as the adjusting spring, a quadratic curve is generated with respect to the load of the pressure receiving plate, so that the air volume can be adjusted more accurately. In addition, if the rear side of the outer cylinder is formed in a conical shape, the air resistance is low and the air readily flows out along the ventilation path.

[0006]

An embodiment of the present invention will be described with reference to the drawings.
Reference numeral 1 denotes an entire ventilation opening according to the present invention, which is composed of a portion of a constant air volume device 2 and a portion of a silencer 3. Reference numeral 4 denotes a circular outer cylinder in the constant air volume device, and a required number of ventilation holes 5 which are elongated in the axial direction are provided at regular intervals on the peripheral side of the central portion. Reference numeral 6 denotes a rear side of the outer cylinder, which is formed in a conical shape, and a bearing 7 is provided at an end thereof. Reference numeral 8 denotes a support rod provided on the front side of the outer cylinder 4, that is, on a side into which air flows. A bearing 9 is provided at the center thereof, and the outer cylinder 4 is pivotally connected to a central shaft 10 by the two bearings 7 and 9. Reference numeral 11 denotes several small ventilation holes provided around the rear part of the outer cylinder. Reference numeral 12 denotes an inner cylinder, and the same peripheral ventilation holes 13 corresponding to the respective ventilation holes 5 of the outer cylinder are provided on the rear peripheral side.
Are arranged at equal intervals, and a pressure receiving plate 14 is provided on the rear side, and a bearing 15 provided at the center of the pressure receiving plate 14 and a bearing 17 provided on a support rod 16 at the front end of the inner cylinder are prisms of the central shaft 10. The outer cylinder 4 can slide inside the outer cylinder 4 by being attached to the portion 18. 19 is the central axis 10
The adjusting knob is attached to the rear end of the inner cylinder 12. As shown in FIG. 3, the knob 18 is turned to change the rotation angle of the inner cylinder 12, thereby adjusting the ventilation area of the ventilation holes 5, 13. The value of the air volume can be changed. 33 is a scale plate indicating the rotation angle of the inner cylinder. 20 is a central shaft 18 between the bearing 7 and the pressure receiving plate 14.
A large-diameter end of the conical adjustment spring fitted to the outside abuts against the pressure-receiving plate 14, and as shown in FIG. , 13 coincide with each other. In this embodiment, the adjusting spring 20 is formed in a conical shape in order to enable accurate air volume adjustment. However, the shape is not limited to this.

Reference numeral 21 denotes a cylindrical casing of the silencer 3 having an inlet 22 fitted on the outer periphery of the front side of the outer cylinder 4 and a bearing provided on a support rod 24 in a casing outlet 23.
The rear portion of the central shaft 10 is pivotally connected by 25. A recess 26 is formed inside between the inlet 22 and the outlet 23 of the casing,
A silencer 27 is mounted along the inner surface of the recess. Thus,
A ventilation passage 30 is formed between the outer cylinder 4 and the muffler 27 so that the air flowing from the inlet 28 and passing through the ventilation hole 5 flows out of the casing outlet 29. In the figure, reference numeral 31 denotes a wall surface of a building, 32 denotes a ventilation hole for attaching the ventilation port 1, and arrows indicate the direction of air flow.

[0008]

According to the present invention, even when the difference in air pressure between the inside and outside of the room becomes large, such as when a ventilation fan is used or a storm occurs, the above configuration allows a constant air volume to be constantly output from the ventilation opening. Can be flowed into. That is, as shown in FIG. 5, when the ventilation port is not installed, the air volume increases in a quadratic curve indicated by F according to the pressure difference between the inside and outside, but when the ventilation port according to the present invention is installed. As shown by the lines A, B, and C, a substantially constant air volume flows in even when the pressure difference changes, and the constant air volume can be changed by turning the knob to adjust the ventilation area of the ventilation hole. Thus, FIG.
As shown in the figure, it is possible to attenuate the entrance of outdoor noise from the ventilation opening. In addition, by providing a rotation angle adjustment knob for the inner cylinder on the center axis, the value of the constant air volume can be appropriately changed as indicated by the lines A, B, and C. Further, by forming the cone with an adjusting spring, the air volume can be adjusted most accurately.

[Brief description of the drawings]

FIG. 1 is a sectional view of a ventilation port according to the present invention.

FIG. 2 is a cross-sectional view of a state where wind pressure is applied.

FIG. 3 is a cross-sectional view showing a state in which the rotation angle of the inner cylinder is changed.

FIG. 4 is a side view of an outlet side of a ventilation port.

FIG. 5 is a graph showing air volume adjustment.

FIG. 6 is a graph showing noise attenuation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ventilation port 2 Constant air volume device 3 Silencer 4 Outer cylinder 5 Ventilation hole 6 Rear plate 10 Center shaft 12 Inner cylinder 13 Ventilation hole 14 Pressure receiving plate 19 Adjusting knob 20 Adjusting spring 21 Casing 22 Inlet 23 Outlet 26 Recess 27 Concave Material 28 Inlet 29 Outlet 30 Ventilation path

Claims (4)

(57) [Claims] 1. A constant air volume device and a silencer device, wherein the constant air volume device is pivotally mounted on both front and rear side surfaces around a central axis and provided with a required number of ventilation holes at equal intervals in a circumferential axial direction. The outer cylinder, and ventilation holes respectively corresponding to the respective ventilation holes of the outer cylinder are provided on the peripheral side, and a pressure receiving plate is provided on the rear side. From the adjustment spring, which is fitted on the outer side of the central axis between the inner cylinder and the rear end of the outer cylinder and the pressure receiving plate of the inner cylinder, and makes the respective ventilation holes of the outer cylinder and the inner cylinder coincide with each other in a windless state. In the muffler, the inlet of the cylindrical casing is fitted around the front outer periphery of the outer cylinder, and the casing outlet supports the rear end of the central shaft. Between the outlets, there is a recess inside and a silencer is attached, and between the outer cylinder and the silencer, the air that has come out of each ventilation hole A ventilation opening for a building, characterized by forming a ventilation passage flowing out of an outlet. 2. The ventilation hole for a building according to claim 1, wherein a knob for adjusting the angle of the inner cylinder is provided at a rear end of the center shaft of the constant air volume device. 3. The ventilation port for a building according to claim 1, wherein the adjusting spring of the constant air volume device is formed in a conical shape, and a large-diameter end thereof is in contact with the pressure receiving plate. 4. A rear side of the outer cylinder is formed in a conical shape, and is pivotally attached to a central shaft by a bearing provided at an end thereof, and a small hole for ventilation is provided around a rear end of the outer cylinder. The ventilation opening for a building according to claim 1, 2 or 3, wherein: