JPH0317170Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a damper for adjusting the flow rate in a duct or a damper for exhausting and ventilating indoor air.

[Conventional technology]

Conventional dampers close the flow path of a duct or the exhaust port of a chamber with one or more blades to open/close and adjust the flow rate.

[Problem that the invention attempts to solve]

Such conventional dampers have problems in that the flow path does not have a sufficient area, resulting in large flow path resistance when opening and closing, and the flow is not symmetrical with respect to the axis of the duct, resulting in turbulent flow.

The present invention was developed in view of the above-mentioned conventional problems.The purpose of this invention is to enable opening and closing with a wide flow path area, reduce flow resistance and allow smooth flow, and further improve the rotation axis. To provide a damper capable of smoothly performing exhaust or ventilation without disturbing the flow by simultaneously opening and closing an opening/closing door axially symmetrically.

[Means for solving problems]

In order to achieve the above object, the present invention has a cylinder connected in a state communicating with a duct or a room, a plurality of openings on the side of the cylinder, and an opening/closing door that closes the opening. The damper is equipped with a rotating shaft attached to the center of the cylindrical body, and an opening/closing mechanism that opens and closes the door by rotation of the rotating shaft.

[Effect]

In the present invention, the air inside the duct or room flows into the cylinder from the exhaust port of the duct or room, flows out through the opening provided on the side of the cylinder, and moves to the duct connected to the cylinder or outdoors. be. Here, since the total opening area of the openings is provided on the side surface of the cylindrical body, a sufficient area can be secured by increasing the length and diameter of the cylindrical body. The air flows smoothly from the duct and the room to the opening because there is no flow resistance because the space in the cylinder is wide and cylindrical. Moreover, the opening/closing door can be opened and closed axially symmetrically by the opening/closing mechanism by rotating its central rotating shaft, thereby reducing the change in direction of the flow and reducing the flow path resistance.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described based on the accompanying drawings.

This example is an example in which the device is used as a ventilation device attached to a roof.

FIG. 1 is a cross-sectional view showing one embodiment of the damper of the present invention, and FIG. 2 is a front view including a partial cross section of the damper.

The damper A has an exhaust port 2 in the membrane roof 1, and is provided so as to communicate with the room R through the exhaust port 2.

A cylindrical body 3 is connected to the exhaust port 2, and the diameter of the side wall 4 of this cylinder 3 can be freely determined according to the exhaust port 2, and its height can be freely set. It has the characteristics of being able to

The above-mentioned openings 5 are opened in such side wall 4, and in this embodiment, four openings are provided at positions facing each other, and the opening area of these openings can be freely increased or decreased.

An opening/closing door 6 for closing each of these openings 5 is attached to the inside of the side wall 4 so as to be openable and closable.

As shown in FIG. 1, the opening/closing door 6 has a horizontal cross section with a curvature that is almost the same as the curvature of the side wall 4, and assumes an almost perfect cylindrical shape when fully closed. As shown in FIG. 1, this opening/closing door 6 has a pivot shaft 7 provided at one end thereof.
It rotates around the fulcrum, and when fully closed, faces the sealing member 8, thereby maintaining airtightness.

An opening/closing mechanism 9 for operating the opening/closing door 6 is connected to the other end side of the opening/closing door 6.

This opening/closing mechanism 9 includes a link mechanism 10 and a drive section 1.
It consists of 1. The link mechanism 10 includes an arm 12 that is rotatably provided at the center of the cylindrical body 3 with the center as a fulcrum, and a connecting rod 13 that is rotatably connected to the arm 12. It is an element constituting this link mechanism 10.
That is, the link mechanism 10 in this embodiment is
It has the smallest four-bar linkage mechanism.

A characteristic feature of this opening/closing mechanism 9 is that, as is clear from the illustrated components, each opening/closing door 6 and link mechanism 10 are configured in a radial shape from the center of the cylinder 3, and the opening/closing door 6 is It is provided perpendicularly to the exhaust port 2, and each opening/closing door 6 can be opened and closed at the same time.

In other words, if there is an even number of opening/closing doors 6, it will be point symmetrical, and if there is an odd number, it will be a radial shape, but regardless of the opening degree of the opening/closing doors 6, it will be a radial shape, ensuring an absolutely large flow path area. The structure is such that it is possible to do so.

A rotating shaft 1 that operates this opening/closing mechanism 9
4 is fixed to the arm 12 at the center of the cylinder 3, that is, at the center of the opening/closing mechanism 9, and the rotating shaft 1
4 is further inserted in a state protruding from the canopy 15 of the cylindrical body 3, and a driving part 11 is connected thereto. Drive part 11
For example, a motor is used. This drive unit 11 is fixed to a canopy 15, as shown in FIG. Furthermore, a hood 16 that covers the upper circumferential space of the cylinder body 3 and the outer circumferential space of the drive unit 11 is attached to the canopy 15.
It is supported by Since this canopy 15 is installed outdoors as shown in FIG.
It has the required size and shape to protect the opening 5 and the drive unit 11 from rainwater, snow, and sunlight, and is designed not to create resistance to exhaust air from the opening 5. Reference numeral 17 is a support for supporting the hood 16.

Next, the operation of the damper A according to the present invention will be explained.

The membrane roof 1 is supported by maintaining the air pressure in the room R slightly higher than atmospheric pressure, and this air pressure is supplied by an air conditioner (not shown). Then, when the required indoor air pressure is reached, the membrane roof 1 is stretched, and the damper A is stabilized on the membrane roof 1 in the state shown in FIG.

Then, in order to maintain this indoor air pressure and to ventilate the indoor air, exhaust to the outdoor air is performed. The damper A in this embodiment is used to perform such exhaust,
The rotating shaft 1 is driven by a drive unit 11 driven by a motor or the like.
4 rotates, the link mechanism 10 operates. That is, the arm 12, the connecting rod 13, and the opening/closing door 6
is activated, and at this time, the opening/closing door 6 operates to open and close the opening 5 using the pivot shaft 7 as a fulcrum.

As the door 6 moves from the fully closed state to the opening direction, an exhaust opening is formed between the opening 5 and the door 6, as shown in FIG. This exhaust opening has a horizontal section formed between the opening 5 and the upper and lower edges 6a and 6b of the opening/closing door 6, and a vertical section formed between the leading edge 6c of the opening/closing door and the side edge 5a of the opening. It consists of The area of this exhaust opening increases or decreases as the opening/closing door 6 is opened/closed, and the amount of exhaust air to the outside O is adjusted.

Note that since the vertical cross section is rectangular and the horizontal cross section is approximately triangular, the exhaust opening area has a linear characteristic with respect to the distance L from the fully closed position of the opening/closing door tip edge 6c.

The exhaust flow path formed when the air in the room R is exhausted to the outside O through the exhaust port 2, the internal space of the cylinder 3, the exhaust opening and the opening 5 is shown in FIG. It will look like chain arrow D. That is, since the flow velocity is high in the center of the exhaust port 2, the flow path is greatly influenced by the air flow in this area.

Then, the exhaust flow is guided according to the circumferential shape of the opening/closing door 6 on the left side in FIG. 1, and is discharged from the exhaust opening and the opening 5 of the opening/closing door 6 on the right side, and flows smoothly.

In addition, as is clear from FIG. 1, the exhaust resistance of the opening/closing door 6 and the link mechanism 10 is small with respect to the flow path cross section of the exhaust port 2, and the rotating shaft 14 and the opening/closing door 6 act as guides for the airflow, making it more symmetrical. Or, because of the radial shape, airflow is not disturbed and exhaust is carried out smoothly.

Moreover, the above relationship is maintained regardless of the degree of opening of the door 6.

In particular, due to the shape and arrangement of the opening/closing door 6, the exhaust flow continues to be guided clockwise as shown in FIG. 1, so that the exhaust becomes smoother.

Furthermore, as is clear from FIG. 1, since the opening/closing door 6 is perpendicular to the cross section of the flow path, an absolutely large flow path area can be ensured.

Further, when the door 6 is opened and closed, the door 6 is hardly subjected to any force perpendicular to its surface, so that no large load is applied to the drive unit 11.

In addition, since the exhaust gas from the cylinder body 3 is blown out in the four circumferential directions, the exhaust gas is characterized in that the exhaust gas is not obstructed even by cross winds outside the room.

Furthermore, when fully closed, the opening/closing door 6 strongly presses the sealing member 8, so that airtightness can be maintained satisfactorily.

Further, since the drive unit 11 is provided on the canopy 15, maintenance can be easily performed by removing the hood 16.

Further, due to the synergistic effect of the above-mentioned features, the exhaust flow rate can be adjusted with high precision.

Therefore, the damper A according to the present invention can be used as a membrane roof 1.
When used for this purpose, it functions not only to exhaust and ventilate the room R, but also to support the basic pressure relationship of the membrane structure (indoor air pressure>outdoor air pressure) and the durability of the membrane surface.

In the embodiment shown in FIG. 1, only the opening/closing doors 6 facing each other are shown in the opening/closing operation state indicated by the chain lines, but the opening/closing mechanism 9 described above
Needless to say, the above-mentioned opening/closing action is performed simultaneously for the other pair of opening/closing doors.

In this embodiment, the shape of the cylinder is cylindrical, but the present invention is not limited to this, and as long as the cross section of the cylinder is square, rectangular, or polygonal. good.

[Effect of idea]

As explained above, according to the damper according to the present invention, by having the configuration with the above characteristics, it can be opened and closed with a wide flow path area, and can be used as an opening/closing damper with a large flow rate, while reducing flow path resistance. Furthermore, opening and closing of the rotating shaft can simultaneously open and close the opening/closing door axially symmetrically, without turbulence in the flow.
This has the effect of being able to be driven with a small driving force and simplifying the structure.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of the damper of the present invention, and FIG. 2 is a front view including a partial cross section of the damper. 1: Membrane roof, 2: Exhaust port, 3: Cylindrical body, 4: Side wall, 5: Opening, 5a: Opening side edge, 6: Openable door, 6a, 6b: Upper and lower edges of openable door, 6c: Tip edge of opening/closing door, 7: Pivot shaft, 8: Seal member, 9: Opening/closing mechanism, 10: Link mechanism, 11: Drive unit, 1
2: Arm, 13: Connecting rod, 14: Rotating shaft, 1
5: Canopy, 16: Hood, 17: Support, A: Damper, R: Indoor, O: Outdoor.

Claims (1)

[Scope of utility model registration request] Cylindrical bodies are installed in a row so as to communicate with the duct or room, multiple openings are provided on the sides of the cylinders, doors are attached to close the openings, and a rotating shaft is installed in the center of the cylinders. , a damper characterized in that it is provided with an opening/closing mechanism that opens and closes an opening/closing door by rotation of the rotary shaft.