JPH0731077Y2 - Air supply damper device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention is attached to a ventilation port formed in a wall of a building, etc. The present invention relates to an air supply damper device that opens a damper wing and supplies necessary air.

[Conventional technology]

Such an air supply damper device can be used in accordance with the principle of opening / closing the damper blade.
Divided into seeds. One is that the damper blade rotates, and the other is that the damper blade moves back and forth. Examples of the latter include, for example, JP-A-60-155845 and JP-A-60-155846.
No. 1-144893, which was previously proposed by the applicant of the present invention, as an improvement of these.

[Problems to be solved by the device]

The damper blades advance and retreat through the shaft member, that is, in a state of being connected to the shaft member supported by the shaft member or supported by the bearing member. Therefore, the stability of the forward / backward movement of the damper blade, that is, the relationship between the shaft member and the damper blade or the relationship between the bearing member and the shaft member is the same as the sliding contact rotational surface is the forward / backward moving surface. There is a problem that "stuck" may occur at the beginning of the forward / backward movement, especially at the start of the backward / forward movement, and the stability of the forward / backward movement is lacking.

[Means for Solving the Problems]

Such a problem is associated with an air supply damper device configured to open and close the ventilation path by advancing and retracting the damper blades due to a pressure difference between the inside and outside of the room via a shaft member supported by the ventilation path forming body. The problem is solved by providing a wind blade on the back surface of the damper blade.

[Action]

In this air supply damper device, when a pressure difference occurs inside and outside the room, the damper blade moves due to this pressure difference to open the ventilation path and supply the outside air to the room. As the wind vanes rotate, the damper blades interlocked with the wind vanes also rotate. Then, when the atmospheric pressure difference between the indoor and outdoor is eliminated, the damper blade will retreat, but at this time, the damper blade smoothly retreats without causing a "trap" due to the rotation.

Further, the rotation of the damper blades helps to diffuse the supplied outside air more widely in the room, and causes a phenomenon called "draft" which causes discomfort to a person by locally flowing air with a temperature difference. It also helps prevent. Further, the rotation of the damper blade has an advantage that the operation of the air supply damper device can be visually recognized and that an interesting dynamic design can be realized.

〔Example〕

An embodiment of the air supply damper device according to the present invention will be described below with reference to the drawings. In the following description, the same reference numerals are used for the parts common to the respective embodiments, and the duplicate description will be omitted as appropriate.

First Embodiment (FIGS. 1 and 2) As shown in FIG. 1, an air supply damper device 1 according to this embodiment includes a damper blade 4 on a shaft member 3 fixed to a ventilation passage forming body 2.
The damper blade 4 is supported by the shaft member 3, and the damper blade 4 presses the pressure P due to the differential pressure, that is, the atmospheric pressure difference between the indoor and outdoor.
The ventilation path E is opened and closed by advancing and retreating as indicated by arrow X in accordance with the balance between the urging force of the spring 5 attached to the shaft member 3 and the urging force of the spring 5.

The ventilation path forming body 2 is composed of a cylindrical tubular member 7 and a cover member 8 which is given an appropriate shape in consideration of decoration. A column 9 is provided between the tubular member 7 and the cover member 8. Is interposed, a diffusion air passage Em for diffusing the outside air passing through the tubular member 7 into the room is formed.

The damper blade 4 is a disk-shaped one having a plurality of wind blades W, W, ..., And this damper blade 4 is provided with a spring 5 on the discharge side of the tubular member 7.
The air passage E is closed by pressing and abutting with the urging force.

More specifically, the air release side of the tubular member 7 is bent and expanded into a trumpet shape to form a bent expansion portion 7m, and correspondingly, the periphery of the damper blade 4 is also inclined and bent to form an inclined bending portion 4m. The inclined bent portion 4m presses and abuts the bent expanded portion 7m of the tubular member 7 in an airtight state. That is,
A parabolic curved ventilation flow as indicated by the arrow Y is formed by the bent expanded portion 7m of the cylindrical member 7 and the inclined bent portion 4m of the damper blade 4. This is done to prevent dew condensation on the cover member 8. That is, direct collision of cold outside air with the cover member 8 due to a parabolic curved airflow such as the arrow Y is avoided, and rapid cooling of the cover member 8 which causes dew condensation is prevented. In addition, by using such an airflow, it is possible to diffuse and supply air evenly throughout the room, so-called "dead zone" for ventilation.
Can be effectively prevented.

Further, the damper blade 4 has a spherical shape in which a portion other than the surrounding inclined bent portion 4m is swollen to the air discharge side, and five wind blades W are erected radially on the swollen portion. This wind blade W
Is for rotating the damper blade 4 by receiving the flow pressure of the outside air supplied through the ventilation passage E. As shown in FIG. 2, it is thin and light in order to efficiently receive the flow pressure of the outside air. The plate is curved in a C shape.

Thus, rotating the damper blade 4 with the wind blade W has the following advantages.

It is possible to smoothly move the damper wing 4 back and forth, in particular, back and forth. That is, as described above, there is a risk that the damper blades 4 may be "trapped" at the start of retreat, that is, a state in which the damper wing 4 does not move due to being caught. Can be made.

Moreover, it contributes to the point that the supplied outside air is diffused more widely in the room, the above-mentioned "dead zone" can be prevented more efficiently, and the air having a temperature difference locally causes discomfort to a person. It also effectively prevents the "draft" phenomenon that occurs.

Second Embodiment (FIG. 3) This embodiment relates to an example without the cover member 8 in the first embodiment. Therefore, in this air supply damper device 20, support members 21 and 21 are provided on the tubular member 7, and the shaft member 3 is supported by the support members 21 and 21.
Moreover, the damper blade 4 is fixed to the shaft member 3 so that the damper blade 4 moves back and forth together with the shaft member 3.

In this air supply damper device 20, the damper blade 4 is exposed because the cover member 8 is not provided, but the operation can be visually recognized by the rotation of the exposed damper blade 4. Further, the rotation of the damper blade 4 becomes a kind of dynamic design, and the decorativeness of the room can be enhanced. Due to this decorative property, the damper blade 4 of this embodiment has a bag-like structure, and when closed, its surface forms a continuous surface with respect to the shape of the end of the tubular member 7. It is supposed to do. Of course, even in the case of the first embodiment, the visual recognition and the dynamic design of such an operation can be realized to some extent by providing the cover member 8 with an appropriate window.

Third Embodiment (FIG. 4) This embodiment is an example of the air supply damper device 30 that uses gravity as the biasing force of the damper blade 4 in the closing direction.

Specifically, the damper blade 4 connected to the shaft member 3 is supported by the support member 31 in an inclined state, and the natural falling force due to the total weight of the damper blade 4, the shaft member 3, and the weight 32 attached to the shaft member 3. Is the biasing force of the damper blade 4 in the closing direction. Further, the shield plate 33 is provided at the front end of the tubular member 7, and the opening formed in the shield plate 33 is opened and closed by the damper blade 4. further,
The wind vane W is connected to the shaft member 3 unlike the above-described embodiments. In the case of the wind blade W separated from the damper blade 4 in this manner, it is preferable that the shape thereof is a propeller shape or a windmill shape.

[Effect of device]

Since the air supply damper device according to the present invention rotates the damper blade by the wind blade as described above, it has the following effects.

(A). It is possible to smoothly move the damper wing back and forth, especially the back and forth.

(B). The supplied outside air can be diffused more widely in the room, effectively preventing the "dead zone" of ventilation.

(C). It is possible to prevent "drafts" that give people discomfort.

(D). The operation of the air supply damper device can be visually confirmed to give a sense of security.

(E). An interesting dynamic design can be obtained.

[Brief description of drawings]

FIG. 1 is a schematic side view including a partial cross section of the air supply damper device according to the first embodiment, FIG. 2 is a schematic side view of a damper blade as seen from the direction of arrow II in FIG. 1, and FIG. FIG. 4 is a partial schematic side view of the air supply damper device according to the second embodiment, and FIG. 4 is a schematic side view including a partial cross section of the air supply damper device according to the third embodiment. 1, 20, 30 …… Air supply damper device 2 …… Ventilation path forming body 3 …… Shaft member 4 …… Damper blade 7 …… Cylindrical member 8 …… Cover member E …… Ventilation path W …… Wind vane

Claims (1)

[Scope of utility model registration request] 1. An air supply damper device which opens and closes a ventilation path by advancing and retracting a damper blade by an air pressure difference between indoor and outdoor through a shaft member supported by a ventilation path forming body, An air supply damper device characterized by providing wind blades that rotate by a ventilation flow, and by rotating the damper blades by the rotation of the wind blades, smoothness of operation is provided when the damper blade retracts. .