JP4436331B2 - Ventilation device with silencing function and ventilation structure using the same - Google Patents

Description

  The present invention relates to a ventilating device having a silencing function incorporated in a wall or joinery of a detached house or an apartment, and a ventilation structure using the ventilation device.

  In general, in a detached house or condominium, when ventilating a room by providing a ventilation path on the wall or joinery of the room, external sound may enter the room through the ventilation path, or sound in the room may leak outside. There's a problem.

  For this reason, conventionally, a measure has been taken in which a sound absorbing material such as foam or glass wool is provided in the air passage to absorb sound propagating through the air passage. However, when the sound absorbing material is provided in the air passage as described above, there is a problem that the sound absorbing material becomes a ventilation resistance and ventilation efficiency is deteriorated.

  Therefore, as disclosed in, for example, Patent Document 1 and Patent Document 2, a structure has been proposed in which the sound transmitted through the air passage is reduced while the air resistance is kept small.

JP 2005-172273 A JP 2005-172274 A

  However, even in the case of the structures disclosed in Patent Document 1 and Patent Document 2 described above, sound insulation members such as a pipe unit having a porous body and a partition plate are provided in the air passage, so that these still remain. There was a problem that ventilation was hindered and ventilation efficiency was liable to decrease.

  In addition to the ventilation equipment provided on the walls and fittings, there is a need for a separate member for sound insulation to be installed in the air passage, resulting in a problem that the structure is complicated and the cost is easily increased.

  Therefore, in order to solve the above-described problems, the present invention uses a ventilation device that can mute sound propagating through an air passage while performing good ventilation, and has a simple structure and a silencing function. The purpose is to provide ventilation structure.

In order to solve the above problems, the ventilation device of the present invention is generally L-shaped, and includes a pair of hollow silencing units 2 and 2 each having openings 8 and 9 for sound wave incidence and a cavity portion 7. The silencing units 2, 2 are opposed to each other with their longitudinal portions 5, 5, and between the distal end of the longitudinal portion 5 of one silencing unit 2 and the short portion 6 of the other silencing unit 2, and the other The gaps between the silencer units 2 and 2 can be obtained by combining the silencer units 2 and 2 in the opposite direction with a gap between the distal end of the longitudinal part 5 of the silencer unit 2 and the short part 6 of one of the silencer units 2. A substantially Z-shaped air passage 10 is formed with the entrances 10a and 10a as the entrances 10a and 10a so that the openings 8 and 9 of the muffler units 2 and 2 face the air passage 10 and on both sides of the air passage 10 Close the blocking members 3 and 3 so as to block the open part. Characterized in that s attached.

Specifically, the whole is formed in a substantially rectangular parallelepiped shape, and the entrances 10a and 10a of the ventilation path 10 are formed on the front side and the back side, respectively.

Moreover, the said obstruction | occlusion members 3 and 3 are made into the hollow auxiliary | assistant silencing unit 3 and 3 which has the opening 22 and 23 for sound wave incidence, and the cavity parts 21a-21f, and the opening 22 and 23 of the auxiliary | assistant silencing unit 3 and 3 is used. It faces the air passage 10. Furthermore, the frequency band of the sound that is silenced by the silencer units 2 and 2 is different from the frequency band of the sound that is silenced by the auxiliary silencer units 3 and 3.

  In the ventilation structure of the present invention, the ventilation device 1 is embedded in the wall bodies 30 and 35 and the fittings 36 and 37 of the building, and the ventilation device 1. Are formed with openings 33... For opening the entrances 10 a.

  In the venting device of the present invention, a plurality of sound deadening units are combined to form a ventilation path between the units. Therefore, there is no member that obstructs ventilation in the ventilation path, and ventilation can be performed well. In addition, the sound propagating through the air passage can be effectively silenced.

  In addition, it has a simple structure in which the silencer units are combined in this way, is easy to maintain, and by adjusting the shape, size, arrangement, etc. of each silencer unit as needed, the air flow rate and the sound to be silenced Can be set arbitrarily, and the degree of freedom in design is high.

  Furthermore, since it is formed in a substantially rectangular parallelepiped shape as a whole, it can be easily incorporated into a narrow space inside a wall body or joinery. In addition, since the entrances and exits of the air passages are formed on the opposite sides, the outdoor and indoor areas partitioned by walls and fittings, or the indoors communicate with each other via the air passages, and the outdoor and indoor areas are connected. And ventilation between rooms can be realized.

  In addition, the use of an auxiliary muffling unit as a blocking member that closes the open part of the ventilation path can improve the noise reduction efficiency. By making the band different, it is possible to mute sounds in a wide frequency band.

  Furthermore, by constructing a pair of substantially L-shaped silencer units in opposite directions, the structure can be made simpler and the manufacturing cost can be reduced compared to the case of combining multiple types of silencer units. Thus, the length of the cavity of the muffler unit can be sufficiently secured while making the entire apparatus compact.

  In the ventilation structure according to the present invention, the outdoor and indoor areas partitioned by the wall body and the fittings, or the indoors are communicated with each other via an air passage, and ventilation between the outdoor and indoors or between the indoors is efficiently performed. In addition, it is possible to effectively mute the sound propagating through the air passage and improve the sound insulation performance.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIGS. 1 and 2, the ventilation device 1 according to one embodiment of the present invention is configured by combining a pair of hollow silencing units 2 and 2 and a pair of hollow silencing units 3 and 3. Has been. That is, a total of four units of two types 2, 3,. The silencer units 2 and 2 have the same shape, and the auxiliary silencer units 3 and 3 have the same shape.

  As shown in FIG. 3, the silencing unit 2 is integrally formed with a substantially rectangular parallelepiped longitudinal portion 5 and a substantially rectangular parallelepiped short portion 6, so that the entirety is formed in a substantially L shape. A substantially L-shaped cavity 7 is provided inside.

  The short part 6 is formed with a sound wave incident opening 8 for guiding sound waves to the cavity part 7. The opening 8 is formed in a slit shape, for example, along the inner corner portion of the silencer unit 2. Further, the length of the cavity 7 from the opening 8 of the short part 6 to the tip of the long part 5 is set to a length of about 1/4 of the wavelength of the sound in the low frequency band to be muffled. . In addition, the sound of a different frequency band can be silenced by adjusting suitably the length from the opening 8 of the short part 6 to the front-end | tip of the longitudinal part 5. FIG.

  In the silencing unit 2, when a sound wave constituting the main component of the sound to be silenced enters the cavity 7 from the opening 8, the sound wave is reflected at the tip of the longitudinal part 5 and emitted from the opening 8. By reciprocating four wavelengths, the half wavelength is shifted. Therefore, the phase of the outgoing wave is shifted by 180 degrees with respect to the incident wave, and both cancel each other and the sound to be silenced can be silenced. Accordingly, the silencer unit 2 functions as an acoustic tube.

  It should be noted that a plurality of partition plates may be provided inside the muffler unit 2 to form a plurality of cavities having different lengths so that a single muffler unit 2 can mute sounds in a wide frequency band. . Further, the sound wave incident opening 8 of the muffling unit 2 is not limited to being formed in the short portion 6 but may be formed in the long portion 5, for example. Further, the shape is not limited to the slit shape.

  Furthermore, the silencer unit 2 is not limited to the one that functions as an acoustic tube as described above, but may be one that functions as a Helmholtz resonator, for example. In this case, instead of the slit-shaped opening 8 as described above, as shown in FIG. 4, for example, the silencer unit 2 is formed with openings 9.

  In the muffling unit 2 functioning as the Helmholtz resonator, when a sound wave constituting the main component of the sound to be muffled is incident on the opening 9..., The air in the opening 9. The air in 7 becomes a spring to form a resonance system, and the air in the opening 9. As a result, a part of sound energy is converted into heat energy by friction between the air in the openings 9 and the peripheral wall of the openings 9 and so on, and the sound to be muffled is silenced. In addition, the vigorous vibration of the air in the openings 9... Makes the sound pressure in the openings 9... Minimal, and forms an acoustically soft boundary. It also has a function to prevent propagation. In addition, the sound of a different frequency band can be silenced by adjusting the aperture diameter, the number, the arrangement, and the like of the openings 9. In addition, a plurality of partition plates are provided inside the muffler unit 2 to form a plurality of cavities corresponding to the respective openings 9... The muffler unit 2 may mute sounds in a wide frequency band.

  On the other hand, as shown in FIG. 5, the auxiliary silencing unit 3 is formed in a hollow, substantially rectangular parallelepiped shape, and a plurality of partition plates 20.. 21a to 21f are partitioned.

  The auxiliary silencing unit 3 is formed with a sound wave incident opening 22 for guiding sound waves to the cavities 21a to 21f. The opening 22 is formed in a slit shape on one side surface of the auxiliary silencing unit 3, for example. The length of each of the hollow portions 21a to 21f is set to about ¼ of the wavelength of the sound in the high frequency band to be muffled, for example. In addition, the sound of a different frequency band can be silenced by adjusting the length of each cavity part 21a-21f suitably.

  In the auxiliary silencing unit 3, as in the case of the silencing unit 2, when a sound wave that forms the main component of the sound to be silenced is incident from the opening 22 to each of the cavities 21 a to 21 f, the sound waves are transmitted to the cavities 21 a to 21 f. When the light is reflected at the terminal end of 21f and is emitted from the opening 22, it is shifted by a half wavelength by reciprocating a quarter wavelength. Therefore, the phase of the outgoing wave is shifted by 180 degrees with respect to the incident wave, and both cancel each other and the sound to be silenced can be silenced. Accordingly, the auxiliary muffler unit 3 functions in the same manner as a structure in which a plurality of acoustic tubes are combined.

  The auxiliary silencer unit 3 is not limited to the one that functions as an acoustic tube as described above, but may be one that functions as a Helmholtz resonator, for example. In this case, instead of the slit-shaped opening 22 as described above, as shown in FIG. 6, the auxiliary muffler unit 3 is formed with openings 23,. The partition plate 20 is abolished. In addition, the sound of a different frequency band can be silenced by adjusting the aperture diameter, the number, the arrangement, and the like of the openings 23. Further, by providing a plurality of partition plates inside the auxiliary muffler unit 3 to form a plurality of cavities corresponding to the openings 23,... You may make it mute the sound of a wide frequency band in the two auxiliary mute units 3.

  The ventilation device 1 is assembled as follows. That is, as shown in FIGS. 1 and 7, the pair of silencer units 2, 2 are combined in opposite directions so as to form a substantially Z-shaped air passage 10 between the silencer units 2, 2. Yes. Specifically, the longitudinal portions 5 and 5 of the silencer units 2 and 2 face each other, and between the distal end of the longitudinal portion 5 of one silencer unit 2 and the short portion 6 of the other silencer unit 2, and the other The silencer unit 2 is combined with a gap between the distal end of the longitudinal part 5 and the short part 6 of one of the silencer units 2. These gaps serve as entrances 10a and 10a located at the end of the substantially Z-shaped air passage 10.

  Further, since the both sides of the air passage 10 are opened only by combining the silencing units 2 and 2 in the reverse direction as described above, the auxiliary silencing units 3 and 3 are arranged so as to block the open portions. Has been. That is, the auxiliary silencing units 3 and 3 are blocking members that block open portions of the air passage 10.

  The silencer units 2 and 2 and the auxiliary silencer units 3 and 3 are bonded together by an adhesive or the like and integrally combined. It is also possible to combine the units 2, 3,... So that they can be disassembled by engaging the silencing units 2, 2 and the auxiliary silencing units 3, 3 with an engagement mechanism, for example.

  In this combined state, the openings 8 and 8 of the muffler units 2 and 2 and the openings 22 and 22 of the auxiliary units 3 and 3 face the air passage 10. The openings 8 and 8 of the silencing units 2 and 2 are arranged over the entire width of the ventilation path 10, and the openings 22 and 22 of the auxiliary silencing units 3 and 3 are arranged over the entire height of the ventilation path 10. Has been. Needless to say, even when the silencer units 2 and 2 and the auxiliary silencer units 3 and 3 functioning as Helmholtz resonators are used, the openings 9, 23...

  As shown in FIG. 2, the ventilator 1 assembled in this way has a substantially rectangular parallelepiped shape whose entire shape is flat, and the entrances 10 a and 10 a of the air passage 10 are provided at the lower part on the front side and the upper part on the back side. Auxiliary silencer units 3 and 3 are attached to the left and right side surfaces, respectively, and close open portions of the air passage 10 that opens to the side surfaces.

  As shown in FIG. 2, for example, the width of the ventilation device 1 is set to about 300 mm, the height H is set to about 260 mm, and the thickness L is set to about 100 mm. By doing so, it can be easily incorporated into a narrow space inside the wall or joinery. These dimensions are merely examples, and are not limited to the above.

  8 and 9 show a state in which the ventilation device 1 having the above configuration is incorporated in an outer wall 30 which is a wall of a house. That is, the ventilating device 1 .. is embedded side by side in the space S between the outer wall material 31 and the interior material 32 so that the front side is along the outer wall material 31 and the back side is along the interior material 32. It is. The outer wall member 31 and the interior member 32 are respectively formed with slit-like openings 33... That open the entrances 10 a of the ventilation passages 10. In this case, the openings 33... On the outer wall material 31 side are arranged below the openings 33... On the interior material 32 side so that rainwater or the like does not enter the room from the outside.

  Note that the method of incorporating the ventilation device 1... Into the outer wall 30 is not limited to the above, and for example, the ventilation ports 10 are embedded vertically in the space S so that the entrances 10a and 10a of the ventilation path 10 are vertically oriented. You may do it. 8 and 9 show a construction example of the ventilation device 1 using the silencer units 2 and 2 and the auxiliary silencer units 3 and 3 that function as acoustic tubes, the silencer unit that functions as a Helmholtz resonator. Even if it is the ventilation apparatus 1 using 2 and 2 and the auxiliary silencer units 3 and 3, what is necessary is just to construct similarly.

  In this way, by incorporating the ventilation device 1 in the outer wall 30, natural ventilation between the outside and the room can be efficiently performed through the ventilation path 10 having a small ventilation resistance, and propagates through the ventilation path 10. Can be effectively silenced by the silencer units 2 and 2 and the auxiliary silencer units 3 and 3. In addition, by making the frequency band of the sound silenced by the silencer units 2 and 2 different from the frequency band of the sound silenced by the auxiliary silencer units 3 and 3, it is possible to mute sounds in a wide frequency band.

  The ventilation device 1 described above may be incorporated not only into the outer wall 30 but also into a partition wall 35 of a house as shown in FIG. 10, for example, and used for ventilation between rooms. As shown, it may be incorporated into a sash 36 or a door 37 which is a housing fixture. Furthermore, it may be incorporated into the ceiling or floor and used for ventilation between the room and the space behind the ceiling or the space under the floor.

  The present invention is not limited to the above embodiment, and it is needless to say that many modifications and changes can be made to the above embodiment within the scope of the present invention.

For example, a sound absorbing material such as glass wool may be appropriately filled in the silencer unit or the auxiliary silencer unit. Furthermore, a part or all of the silencing unit and the auxiliary silencing unit are formed of a porous plate material, and the porous plate material is arranged so as to face the air passage, so that the numerous minute holes are used for sound wave incidence. The sound that is to be silenced may be silenced by facing the air passage as an opening. Furthermore, such a structure made of a porous plate material may be combined with a silencer unit or an auxiliary silencer unit that functions as an acoustic tube or a Helmholtz resonator.

In addition, the blocking member that closes the open portion of the air passage is not limited to a member having a silencing function such as an auxiliary silencing unit, and may be, for example, a simple plate or block . Furthermore, as shown in FIG. 13, when a plurality of ventilation devices are arranged side by side, the closing member may be eliminated between the ventilation devices.

It is a disassembled perspective view of the ventilation apparatus which concerns on one Embodiment of this invention. It is the perspective view similarly. It is a perspective view of a silencer unit. It is a perspective view of another silencing unit. It is a disassembled perspective view of an auxiliary silencer unit. It is a perspective view of another auxiliary silencer unit. It is a longitudinal cross-sectional view of a ventilation apparatus. It is a perspective view which shows the state which integrated the ventilation apparatus in the outer wall. It is the longitudinal cross-sectional view similarly. It is a perspective view which shows the state which integrated the ventilation apparatus into the partition wall. It is a perspective view which shows the state which integrated the ventilation apparatus in the sash. It is a perspective view which shows the state which integrated the ventilation apparatus in the door. It is a perspective view which shows the state which arranged the several ventilation apparatus in parallel and combined.

Explanation of symbols

  1 .. Ventilation device 2 .. Silencer unit 3 .. Auxiliary silencer unit (occlusion member) 5 .. Longitudinal part 6.. Short part 8, 9. Ventilation path, 10a .. Entrance / exit, 22, 23 .. Sound wave incident opening, 30 ..Outer wall, 33 ..Opening part, 35 ..Partition wall, 36 ..Sash, 37.

Claims (5)

The whole is substantially L-shaped, and includes a pair of hollow silencing units (2) and (2) having openings (8) and (9) for sound wave incidence, and a silencing unit (2). (2), the longitudinal portions (5) and (5) are opposed to each other, and the distal end of the longitudinal portion (5) of one silencing unit (2) and the short portion (6) of the other silencing unit (2) And in a state in which there is a gap between the distal end of the long part (5) of the other silencing unit (2) and the short part (6) of the silencing unit (2). To form a substantially Z-shaped air passage (10) with the gap as the entrance / exit (10a) (10a) between the silencing units (2) and (2), and the silencing unit (2) The opening (8) (9) of (2) is made to face the air passage (10), and the air passage (1 Venting device having a silencer function, wherein the closing member (3) (3) to the attached respectively so as to close the open portion of the sides of). The ventilating device provided with a silencing function according to claim 1, wherein the ventilator (10a) is formed in a substantially rectangular parallelepiped shape as a whole, and the entrances (10a) and (10a) of the vent passage (10) are formed on the front side and the back side, respectively. The closing member (3) (3) is used as a hollow auxiliary silencing unit (3) (3) having openings (22) and (23) for sound wave incidence and hollow portions (21a) to (21f). The ventilation device having a silencing function according to claim 2, wherein the opening (22) (23) of the silencing unit (3) (3) faces the ventilation channel (10) . The sound deadening function according to claim 3, wherein a frequency band of a sound to be silenced by the silencer unit (2) (2) and a frequency band of a sound to be silenced by the auxiliary silencer unit (3) (3) are different . Aeration device. 5. The ventilation device (1) according to any one of claims 1 to 4 is embedded in a wall body (30) (35) or a fitting (36) (37) of a building, and the wall body (30) (35). ) And fittings (36) and (37) are formed with openings (33) that open the entrances and exits (10a) of the ventilation passages (10) of the ventilation device (1). Ventilation structure to do.