KR20080052369A - Ventilation device - Google Patents

Abstract

A ventilation device is provided to simultaneously realize noise insulating and ventilating operations by forming airways that have different lengths from each other and are extended from an indoor wall and an outdoor wall, respectively. A ventilation device comprises a body casing(4) having an outdoor wall(4a) and an indoor unit(4b). Airways(9,10) are formed in the body casing such that the airways communicate with an air hole(5) formed in the outdoor wall and an air hole(6) formed in the indoor wall. The airways are divided into first and second airways having different lengths from each other, so that a dephasing phenomenon occurs when noise sound waves passing through the airways, respectively, and joins at a joining point of the airways, thereby removing energy of the noise sound waves.

Description

Ventilation device {VENTILATION DEVICE}

The present invention relates to a ventilation device having a mute function for reducing noise from the outside while maintaining ventilation performance.

The prior art which prevents unnecessary sound from entering while ventilating a building is described, for example in Unexamined-Japanese-Patent No. 62-29691 and Unexamined-Japanese-Patent No. 57-122234. In these patent documents, Japanese Patent Laid-Open No. 62-29691 forms a ventilation opening in a door frame, and forms a plurality of shielding plates to form a meandering ventilation passage in the ventilation opening, whereby the sound inside the room is passed through the ventilation opening. To prevent leakage. In Japanese Laid-Open Patent Publication No. 57-122234, a ventilation opening is formed in a wall, and the position of the ventilation openings formed in one room and the positions of the ventilation openings formed in the other room are arranged so as not to overlap with each other by being disposed upside down. It prevents the sound of to leak.

In the technique described in the patent document, a sound absorbing material is attached to the inner wall of the meandering ventilation passage, and the energy of the noise is reduced by absorbing the sound absorbing material in the process of transmitting sound sound waves in the ventilation passage. Therefore, in order to obtain a high mute effect, a long ventilation passage is required, and as a result, there is a problem that the size of the mute mechanism portion is enlarged. In order to ensure the length of the ventilation passage, the mute mechanism is meandered in the thickness direction of the door or the wall, so that the projecting dimension from the door or the wall increases. Further, when the mute mechanism part meanders in the height direction of the door or the wall, the ratio of the mute mechanism part to the surface area of the door or the wall increases. In addition, as the length of the ventilation passage is increased or meandered, the resistance associated with the ventilation is increased, which also causes a problem that the efficiency of the ventilation is lowered.

SUMMARY OF THE INVENTION The present invention has been made in view of the problems of the prior art, and in a ventilation apparatus mounted on a wall of a building to provide ventilation in and out of a building, it does not require a long ventilation passage and ensures good ventilation. An object of the present invention is to provide a ventilation device having sound insulation.

The ventilator according to the present invention includes a main body casing having an outdoor side wall and an indoor side wall, and in the main body casing communicates an air vent formed on an outdoor wall and an air vent formed on an indoor wall. A furnace is formed, and through this ventilation path, the room is ventilated and noise is prevented from entering the room from the outside. And when the noise sound waves passing through the one passage and the noise sound waves passing through the other passage meet at the confluence point of the passages, phase shifts that remove the respective energy therefrom To occur, the lengths of the two branched passages to the confluence point are made different.

In the center of the main body casing, a box-shaped mute chamber filled with a mute material therein may be arranged to receive sound waves reflected on the outer surface of the partition wall forming the air passage.

A portion of the first passage and a portion of the second passage are respectively formed as perforated panels, and a mute chamber is formed outside the perforated panels by filling a mute between the perforated panel and the wall constituting the main body casing. You may also do it.

A sound wave reflecting plate is formed in the main body casing at a position opposite to the air vent formed on the side wall of the outdoor side, and reflects the sound wave entering the main body casing through the air vent toward the air vent, and exits the air vent to the outside of the main body casing. Sound waves not discharged may be introduced into each of the two branched passages.

In the present invention, air circulation outside the room is achieved through the air passage, and in particular, outdoor air is introduced into the room. At this time, noise sound waves from an external noise source are introduced through the air passage, and the air passage is branched from the outdoor vent and joined to the indoor vent, and the length of each vent is different. When the noise sound waves entering from the air passage of N and the sound waves entering from the other air confluence, the inverted phases meet to attenuate the sound wave energy. In addition, since a mute chamber is formed in the main body of the apparatus (body casing) and a reflector is formed on the wall surface of the vent, noise sound waves entering from the vent are introduced into the mute chamber to attenuate the sound pressure energy.

Therefore, even if there is no long ventilation path with a sound absorbing material, it is possible to provide a ventilation device having both a mute effect and a ventilation performance.

The structure of one Embodiment of the ventilation apparatus by this invention is demonstrated using FIG. 1 and FIG.

As shown in FIG. 2, the ventilator 1 is mainly provided in the longitudinal direction of the window frame 2, and even though the window 3 is closed, the air flow to the outside and the room is somewhat limited through the ventilator 1. It is secured.

As shown in FIG. 2, the main body casing 4 of the ventilation device 1 is formed in a box shape surrounded by an outdoor wall 4a, an indoor wall 4b, and left and right sidewalls 4c and 4d. It is. The ventilation port 5 of the outdoor side is opened in the width direction center part of the wall 4a of the outdoor side. The ventilation opening 6 on the interior side is opened from the width direction center part of the wall 4b of the interior side to the position adjacent to one side surface 4d (side wall of the right side in FIG. 2). The vent 5 on the outdoor side mainly functions as an outside air inlet for introducing outside air into the room, and the vent 5 is equipped with a filter 7 for preventing dust, dust, and the like from entering from the outside. On the other hand, the indoor side vent 6 functions mainly as an outdoor air inlet for sending outdoor air from the outdoor side vent 5 to the interior, and is opened and closed by the opening and closing flap 8 so as to switch the main part of the ventilation. do.

The outdoor vent 5 and the indoor vent 6 are communicated with each other by an air passage. This vent is branched from the vicinity of the outdoor vent 5 to form two independent vents 9 and 10, and is also merged near the vent side 6 of the interior.

In the center position of the main body casing 4, the center mute chamber 11 which filled the sound absorption material 12 is formed. This central mute chamber 11 is a box-shaped structure which is opened toward the outdoor vent 5, and is placed in a position surrounded by two vents 9 and 10, and the noise in those vents 9 and 10 is reduced. This serves to attenuate the sound pressure energy.

In addition, the structure of the branched ventilation paths 9 and 10 and the center mute chamber 11 is demonstrated with reference to FIG.

The first air passage 9 is defined by the outer partition 13 and the inner partition 14 in the main body casing 4 and has a shape curved toward the center of the main body casing 4. The outer partition 13 constituting the air passage 9 includes an arc wall portion 13b extending from the vicinity of the opening edge of the outdoor vent 5 to the left wall 4c of the main body casing 4, and the main body. It consists of an elliptic wall portion 13c extending from the left wall 4c of the casing 4 over the center of the main body casing 4. One end of the circular arc wall portion 13b is the start end 13a of the air passage 9, and one end of the elliptic wall portion 13c is the end 13d of the air passage 9.

The arc wall portion 13b is formed by processing the perforated panel into an arc shape. The elliptic wall portion 13c is formed by processing the flat panel into an elliptic shape. And the space formed between the back surface of the arc part 13b and the corner part of the main body casing 4 is formed in the corner part mute chamber 20 which filled the sound absorption material 19. As shown in FIG.

The inner partition 14 which comprises the 1st ventilation path 9 is comprised from the ellipse wall 14b. One end of the elliptic wall 14b (starting end 14a of the inner partition 14) is positioned at the position of the first focal point f1 of the elliptical wall portion 13c constituting the outer partition 13, and the other end (inside The end 14c of the partition 14 enters the center mute chamber 11 and extends to the center line CL passing through the vent 5 on the outdoor side. Moreover, the outer partition 13 and the inner partition 14 which comprise the 1st ventilation path 9 are the elliptical wall of the 2nd focal point f2 of the elliptical wall part 13c of the inner partition 13, and the outer partition 14 The first focal points f3 of 14b are arranged in an overlapping positional relationship.

The second passage 10 is partitioned by the outer partition 15 and the inner partition 16 and is disposed symmetrically with the first passage 9 relative to the centerline CL in the body casing 4. Therefore, description of this structure is omitted.

The central mute chamber 11 has a box shape opened toward the ventilation opening 5 on the outdoor side, and from the opening 11 a to the inside of the inner partition wall 14 constituting the first air passage 9. One end and one end of the inner partition 16 constituting the second passage 10 are received. The elliptical wall 14b of the inner partition 14 constituting the first air passage 9 is disposed such that its second focal point f4 overlaps with the position of the opening 11a of this central mute chamber 11. have. In addition, since the center mute chamber 11 is arranged not to be in close contact with the interior wall 4b of the main body casing 4 but has a gap therebetween, the wall 4b on the interior side and the center mute chamber Between the bottoms of (11), an extension passage (17) from the first passage (9) to the indoor side vent (6) is formed.

In the main body casing 4, the cross-section parabolic acoustic wave reflecting plate 18 faces the outdoor vent 5 so that the focal point f5 of the cross-section parabola overlaps with the position of the vent 5 on the outdoor side. It is arranged.

The vent 5 on the outside side becomes a common inlet of the first passage 9 and the second passage 10 and is formed on the center line CL of the main body casing 4. On the other hand, the vent 6 on the indoor side becomes a common outlet of the first passage 9 and the second passage 10, and the one side (right side) side wall 4d from the center line CL of the main body casing 4 It is formed at the position close to). As a result, the length of the first air passage 9 and the length of the second air passage 10 are not the same, and the first air passage 9 has the interior wall 4b and the central mute room 11. Is longer than the second passage 10 by the length of the extension passage 17 formed between the bottoms of the ().

The difference between the lengths of the first air passage 9 and the second air passage 10 is that the noise of the mute function is prevented from entering the room as much as possible through the main body casing 4 through the main body casing 4. Function as one That is, among the noises that enter the main body casing 4 from the vent 5 on the outdoor side, the unmuted sound waves in the central mute chamber 11 pass through the first passage 9 and the second passage 10. When joining, since the first passage 9 and the second passage 10 differ in length, they act so that sound waves of a phase and sound waves whose phases are reversed overlap each other to remove their sound pressure energy from each other. As a result, a mute effect is obtained. Therefore, the length of the extension passage 17 is designed such that the sound wave from the first passage 9 is such that its phase is inverted with respect to the sound wave from the second passage 10.

Next, the ventilation operation and the mute operation | movement of the ventilation apparatus 1 shown in FIG. 2 are demonstrated with reference to FIG. 3 and FIG.

First, the ventilation operation of the ventilation device 1 will be described. When the opening / closing flap 8 is opened, outside air enters the main body case 4 from the vent 5 on the outdoor side. A filter 7 is attached to the vent 5 on the outdoor side to prevent dust and dust from entering. Since the introduced outside air is branched into the curved first air passage 9 and the second air passage 10, the amount of inflow air is suppressed and the intrusion of rain and the like is also suppressed. The outside air that has passed through the first passage 9 and the outside air that has passed through the second passage 10 soon merges, and is introduced into the interior through the indoor side vents 6. In addition, since only the opening and closing of the opening / closing flap 8 can select whether to open or close the ventilation, the opening degree is automatically changed depending on the amount of slit or air volume for manually adjusting the opening degree of the ventilation opening near the indoor side ventilation opening 6. It is preferable to form a flow rate adjustment valve or the like.

Next, the mute operation | movement of the ventilation apparatus 1 is demonstrated. When the opening / closing flap 8 is opened, noise sound waves enter the main body case 4 from the outdoor side ventilation opening 5. Noise sound waves entering from the outdoor vent 5 are first reflected from the acoustic wave reflector 18 toward the focal point f5 aligned with the outdoor vent 5, and a part of the sound wave is directed outward from the outdoor vent 5. Go back (first mute).

Sound waves not reflected by the sound wave reflecting plate 18 are introduced into the first passage 9 and the second passage 10, and the outer partition 13 and the inner partition 14 constituting the first passage 9. ) And the ellipses of the elliptical wall portion 13c and the outer partition 15 of the outer partition 13 while being diffusely reflected between the outer partition 15 and the inner partition 16 constituting the second passage 9 respectively. Go to the wall part. Noise sound waves enter the corner mute chamber 20 on the back side from the arc wall portion 13b formed of the perforated panel in this process, and the reflected waves are energized by repeating the diffuse reflection in the corner mute chamber 20. Are removed from each other or the energy of sound waves is reduced by the action of the sound absorbing material 19. As a result, the energy of noise sound waves is greatly reduced and muted. In addition, energy loss between reflection waves due to diffuse reflection between the outer partition 13 and the inner partition 14 also acts, resulting in attenuation of sound pressure (second mute).

Sound waves that reach the elliptic wall portion 13c of the outer partition 13 cause reflection in this elliptic wall portion 13c. At this time, since the start end 14a of the inner partition 14 is aligned with the first focal point f1 of the elliptical wall portion 13c of the outer partition 13, the start 14a and the outer partition 14 of the inner partition 14 The sound wave propagating through the opening d1 (see FIG. 4) formed between the end of the arc wall portion 13b (joining portion with the elliptic wall portion 13c) of 13 is the first focal point of the elliptic wall portion 13c. This elliptic wall portion 13c comes into contact from a position outside of f1. Therefore, the sound wave reflected on the elliptic wall portion 13c is directed toward the outside of the second focal point f2 of the elliptic wall portion 13c. By the way, since the terminal 13d of the outer partition 13 is bent toward the second focal point f2 of the elliptical wall portion 13c of the outer partition 13, the sound wave reflected on the elliptical wall portion 13c is outside of this. Since it is concentrated to the bay-shaped space d2 consisting of the terminal 13d of the partition 13 and the elliptical wall portion 13c, it is difficult to go out into the aeration path, and as a result, intrusion into the room is reduced (third) Mute).

Sound waves exiting the elliptical wall portion 13c of the outer partition 13 cause reflection in the elliptical wall 14b of the inner partition 14. Here, since the first focal point f3 of the elliptic wall 14b is aligned with the second focal point f2 of the elliptic wall portion 13c of the outer partition 13, the start 14a and the outer partition 13 of the inner partition 14 are separated. The sound wave emitted from the opening d3 formed between the ends 13d of the s) touches the elliptical wall 14b from the outside of the first focal point f3 of the elliptical wall 14b of the inner partition 14. Therefore, the sound waves reflected on the elliptic wall 14b are introduced into the central mute chamber 11 through the opening d4 of the central mute chamber 11. The noise sound waves entering the center mute chamber 11 repeat the diffuse reflection in the center mute chamber 11 so that the reflected waves remove energy from each other, or the sound wave has the effect of the sound absorbing material 12 formed in the center mute chamber 11. As a result of the energy being reduced, the energy of the sound wave is significantly reduced and muted (fourth mute).

Sound waves reflected by the elliptical wall 14b of the inner partition 14 but not entering the central mute chamber 11 or returned from the central mute chamber 11 to the aeration path are finally opened in the central mute chamber 11. From the opening d5 formed between the bent portion of the elliptical wall portion 13c of the outer partition wall 13 toward the indoor vent 6, the first passage 9 and the second passage ( At the confluence point P of 10), sound waves whose phases are reversed meet with each other, thereby attenuating the sound pressure energy (the fifth mute).

In this way, noise sound waves introduced into the main body casing 4 from the outdoor vent 5 are gradually muted in the main body casing 4, thereby minimizing entry into the room. Of course, it is difficult to mute all the noise sound waves coming from the outdoor vent 5, and the noise sound waves which have not been muted all leak from the indoor vent 6 to the room, but the sound pressure energy is greatly reduced, so that a sufficient mute effect is achieved. Can be obtained.

In the above-described embodiment, the partition wall forms a true arc wall and an ellipse wall, but the panel may be bent in a polygonal shape or continuously joined to form an approximate arc and an approximate ellipse. In this case, the directionality of the reflection is disturbed, but sufficient mute performance can be obtained by the mute action in the plurality of steps described above.

The above and other objects and features of the present invention will become apparent from the following description of the embodiments with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the state which installed one Embodiment of the ventilation apparatus by this invention in one side of a window frame.

It is sectional drawing which shows the internal structure of the ventilation apparatus shown in FIG.

FIG. 3 is a view for explaining the ventilation operation in the ventilation device shown in FIG. 2.

FIG. 4 is a diagram for explaining a mute operation in the ventilator shown in FIG. 2.

Claims (4)

A main body casing having an outdoor side wall and an indoor side wall is provided, and a ventilation path is formed in the main body casing to communicate the air vent formed in the outdoor side wall with the air vent formed in the indoor side wall. In the ventilation device which aimed at the ventilation of the room through a furnace and prevents the invasion of the noise from the outdoors to the room, When the sound paths that diverge the air passages into two and noise sound waves passing through one of the air passages meet at the confluence point of the other air passages, there occurs a phase shift that eliminates each energy there. The ventilation device of claim 2, wherein the lengths of the two branched air passages to the confluence point are different from each other. The method of claim 1, A ventilation device for arranging a box-shaped mute chamber filled with a mute material therein at a central portion of the main body casing to receive sound waves reflected on the outer surface of the partition wall forming the air passage. The method of claim 1, A portion of the first passage and a portion of the second passage are each formed as a perforated panel, and a mute chamber is formed on the outside of the perforated panel by filling a mute between the perforated panel and the wall constituting the main body casing. Ventilation system. The method of claim 1, A sound wave reflecting plate is formed in the main body casing at a position opposite to the air vent formed on the side wall of the outdoor side, and reflects the sound wave entering the main body casing through the air vent toward the air vent, and exits the air vent to the outside of the main body casing. And ventilated sound waves are introduced into each of the two branched passages.

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