JP2000304320A - Silencing air supply hole - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a silencing air supply noise with reduced pressure loss while reducing the number of assemblies with simplified constitution parts. SOLUTION: There are provided a cylindrical silencing member 4 disposed on an internal peripheral portion of a duct 2 provided, penetrating an outer wall 1 of a building, a cylindrical frame 5 in the internal peripheral portion of the silencing member 4, which is insertable from an opening inside a room, and an air supply grill 6 provided in the frame 5. Hereby, pressure loss is sharply reduced with the reduced number of assembling steps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a silencing type air supply opening which is provided as a measure for silencing noise entering a room when fresh outside air is taken in from the outside.

[0002]

2. Description of the Related Art In recent years, when a house is becoming more airtight and a ventilation fan having a large air volume is operated in a kitchen or the like, a negative pressure is generated in the room, making it difficult to open and close a door, or air enters through a gap between the doors and a kind of air is introduced. A phenomenon of generating a whistling sound occurs, and an air supply port for taking in outside air from outside is provided to reduce such a phenomenon.

Conventionally, this kind of air supply port has been disclosed in
The structure as shown in Japanese Patent No. 55259 was common.
Hereinafter, the configuration will be described with reference to FIGS.

[0004] As shown in the figure, a tubular body 102 for communicating between the inside and the outside of a building is inserted into an outer wall 101 of a building, and the tubular body 10 is inserted.
2, a soundproof unit 103 is provided on the inner peripheral portion. An outdoor hood 104 for preventing intrusion of wind and rain is provided at an outdoor opening of the soundproofing unit 103, and an air supply grill 105 for covering the opening is provided at an indoor opening.
As shown in FIG. 7, the soundproof unit 103 includes, at one open end of a rectangular frame-shaped member 106, a partition plate 108 provided with a sound absorbing material layer 107 on both sides, and one side of this open end. It is provided so that the ventilation opening 109 is formed. And the soundproofing unit 103 is provided with the ventilation opening 109.
Are alternately positioned on the upper side or the lower side as shown in FIG. 7 and are continuously provided on the inner peripheral portion of the tubular body 102, and a meandering ventilation flow path 110 for communicating between the room and the outside is formed therein. (See FIG. 6).

[0005] In the above configuration, the outside air taken in from the outdoor is sucked from the outdoor hood 104, passes through the meandering ventilation passage 110, and is supplied into the room from the air supply grill 105 (solid arrow in FIG. 6). . At the same time, the noise from the outside passes through the meandering ventilation passage 110, where it is silenced and the propagation of the noise into the room is greatly attenuated.

[0006]

In such a conventional air supply port, the air from the outside passes through the meandering ventilation passage 110 and is supplied into the room, so that the pressure loss becomes high, and the indoor side has a high pressure loss. The whistling sound may be generated from the air supply grill 105 of the first embodiment.

In addition, since the meandering ventilation passage 110 is formed, the number of components increases, and the number of assembly steps during manufacturing is large.

An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide a silencing type air supply port with reduced pressure loss by reducing the number of assembly steps in manufacturing.

[0009]

According to the present invention, there is provided a sound deadening type air supply opening provided on an inner peripheral portion of a duct penetrating through an outer wall of a building, and having a ventilation passage opening to the indoor side and the outdoor side. A cylindrical silencing member having the silencing member, a cylindrical frame fitted into an inner peripheral portion of the silencing member from an opening on the indoor side, and an air supply grill provided at an indoor end of the frame. It is configured.

According to the present invention, it is possible to provide a silencing type air supply port with reduced pressure loss while reducing the number of assembly steps in manufacturing.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention has a ventilation passage which is disposed on the inner peripheral portion of a duct penetrating through the outer wall of a building and which opens to the indoor side and the outdoor side. Comprising a cylindrical silencer member, a cylindrical frame fitted into an inner peripheral portion of the silencer member through an opening on the indoor side, and an air supply grill provided at an indoor end of the frame. Since the ventilation path in the duct is formed by a cylindrical silencing member that is open on the indoor side and the outdoor side, the pressure loss is low, and noise from the outside is reduced by the silencing member. And the number of constituent parts is small, so that it can be assembled with low man-hours.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

(Embodiment 1) As shown in FIG. 1, a duct 2 is inserted through an outer wall 1 of a building, and the inner periphery of the duct 2 is made of glass wool or the like and has openings on the indoor side and the outdoor side. A cylindrical silencing member 4 having a ventilation passage 3 is provided, a cylindrical frame 5 is fitted into the inner peripheral portion of the silencing member 4 from the indoor side, and an air supply grill 6 is provided at the indoor side end of the frame 5. Provided. An outdoor hood 8 having a sleeve 7 inserted into the duct 2 is provided outside the duct 2.

When a ventilation fan (not shown) attached to a room having the above-described air supply port is operated, a negative pressure is generated in the room, and the outside air is sucked from the outdoor hood 8 by a pressure difference between the room and the outside, and the sound deadening member is provided. The air is supplied from the air supply grille 5 into the room through the ventilation passage 3 and the frame 5 of the vehicle. At this time, the flow path through which the outside air passes is straight in the duct 2, so that the pressure loss is extremely small, while the noise is silenced when the outside air passes, and the propagation to the room is greatly attenuated. Is done.

As described above, according to the muffler-type air supply port of the first embodiment of the present invention, a muffler-type air supply port with greatly reduced pressure loss is provided with a simple structure and a reduced number of assembly steps. be able to.

(Embodiment 2) As shown in FIG. 2, a noise reduction member (large) 4A and a noise reduction member (small) 4B having different inner diameters are provided on an inner peripheral portion of a duct 2 inserted into an outer wall 1 of a building. The silencing member (large) 4A having a larger inner diameter is arranged on the indoor side, and the silencing member (small) 4B having a smaller inner diameter is arranged on the outdoor side. And these silencing members (large) 4A and (small)
4B forms a ventilation path 3A having a different diameter in the middle.

In the above configuration, the outside air taken in from the outdoor is sucked in from the outdoor hood 8 and the sound deadening member (small).
4B, the inner diameter of the silencing member (small) 4B is
Since it is smaller than the inner diameter of the silencing member (large) 4A and the frame 5 in which the inner peripheral portion is fitted, the silencing effect is further enhanced.

(Embodiment 3) As shown in FIG. 3, a porous thin plate is provided so as to cover the outer periphery of a cylindrical frame 5 provided on the inner side of the interior of a duct 2 inserted into an outer wall 1 of a building. And a ventilation path 3 </ b> B is formed between the outer peripheral surface of the ventilation tube 9 and the inner peripheral surface of the duct 2. The opening at the outdoor end of the ventilation pipe 9 is closed by a flat plate 11 having a sound deadening material 10 adhered to the outdoor surface, and the space between the ventilation pipe 9 and each indoor end of the duct 2 is a muffling member. Filled with 4C.

In the above configuration, the noise that enters from the outside with the introduction of outside air goes around the outer periphery of the ventilation pipe 9 because of the flat plate 11, enters the ventilation pipe 9 while bending, and enters the air supply grill. The light propagates through the ventilation pipe 9 and is greatly attenuated.

(Embodiment 4) As shown in FIG. 4, a silencing member (large) 4D and a silencing member (small) 4E having different inner diameters are provided inside a duct 2 inserted into an outer wall 1 of a building. The (small) 4E is fitted to the outer peripheral portion of the frame 5, and the noise reduction member (large) 4D is arranged and provided so as to fit between the outer circumference of the noise reduction member (small) 4E and the inner circumference of the duct 2. ing. The silencing member (large) 4D is slidable relative to the silencing member (small) 4E.

In the above configuration, the position where the noise reduction member (large) 4D is provided is a position where it comes into contact with the indoor end of the sleeve 7 provided in the outdoor hood 8, so that the thickness of the outer wall 1 can be adjusted. Sound deadening member (large) installed in duct 2
4D, the length of the silencing member (small) 4E can be adjusted without reducing the silencing effect.

(Embodiment 5) As shown in FIG. 5, a silencing member (large) 4F and a silencing member (small) 4G having different inner diameters are provided inside a duct 2 inserted into an outer wall 1 of a building. The inside of the small (4G) 4G fits into the outer peripheral portion of the frame 5, the outside of the silencing member (small) 4G projects into the inside of the sleeve 7 provided with the air supply grill 8, and the large silencing member 4F. It is provided so as to fit between the outer circumference of the noise reduction member (small) 4G and the inner circumference of the duct 2. In the above configuration, since the silencing member (small) 4G is fitted to the outer peripheral portion of the frame 5, and the outdoor side projects into the sleeve 7 of the outdoor hood 8, even when the thickness of the outer wall 1 is thin. In addition, the outdoor end of the silencing member (small) 4G does not become unable to be disposed in contact with the sleeve 7 and can be disposed.

[0023]

As is clear from the above embodiment,
According to the present invention, a muffling member provided on an inner peripheral portion of a duct inserted into an outer wall of a building, a cylindrical frame fitted into an inner peripheral portion of the muffling member from an opening on the indoor side, With the configuration including the air supply grill provided at the indoor side end, a silencing air supply port with significantly reduced pressure loss can be provided with a reduced number of assembly steps.

[0024] Further, a noise reduction member having a different diameter of the ventilation path is continuously provided on the inner peripheral portion of the duct, and a noise reduction member having a smaller diameter of the ventilation path is arranged on the outdoor side to improve the noise reduction effect. Can be.

[0025] Further, a ventilation duct made of a porous thin plate is provided inside the duct, and a ventilation passage is formed around the outside of the duct. A noise reduction member is arranged between the outer peripheral surface of the duct and the inner peripheral surface of the duct, and the outside of the room is closed with a flat plate to which a sound absorbing material is adhered. Since the vehicle travels in a bent position in the ventilation pipe without going straight, it will be greatly attenuated.

[0026] Also, a first silencing member fitted to the outer peripheral portion of the frame and a second silencing member fitted to the inner peripheral portion of the duct are provided. The length of the muffling member provided in the duct is adjusted according to the thickness of the outer wall by slidably moving with respect to the first muffling member according to the distance between the provided outdoor hood and the frame. The sound can be adjusted without reducing the sound deadening effect.

Also, a third noise reduction member fitted to the inner peripheral portion of the duct and a fourth noise reduction member fitted between the inner peripheral portion of the third noise reduction member and the outer peripheral portion of the frame are provided. Since the fourth silencing member is provided so as to protrude into the interior of the outdoor hood, the fourth silencing member can be installed on the thin outer wall without disturbing the silencing member. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing a silencing air supply port according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a silencing air supply port according to a second embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a silencing air supply port according to a third embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a silencing air supply port according to a fourth embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a silencing air supply port according to a fifth embodiment of the present invention.

FIG. 6 is a sectional view showing a conventional air supply port.

FIG. 7 is an exploded perspective view of the soundproof unit of the air supply port.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 outer wall 2 duct 3 ventilation path 4 noise reduction member 4A noise reduction member (large) 4B noise reduction member (small) 4C noise reduction member 4D noise reduction member (large) 4E noise reduction member (small) 4F noise reduction member (large) 4G noise reduction member (small) 5 Frame 6 Air supply grille 8 Outdoor hood 9 Ventilation tube 10 Noise reduction material 11 Flat plate

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) G10K 11/16 G10K 11/16 B

Claims (5)

[Claims] 1. A tubular silencing member provided on an inner peripheral portion of a duct penetrating an outer wall of a building and having a ventilation passage opening to the inside and the outside of the building, and an inner periphery of the silencing member. A silencing type air supply port comprising: a cylindrical frame fitted into a portion of the frame through an opening on the indoor side; and an air supply grill provided at an indoor end of the frame. 2. The silencing type air supply port according to claim 1, wherein a silencing member having a different diameter of the ventilation path is continuously provided on an inner peripheral portion of the duct, and a silencing member having a smaller diameter of the ventilation path is disposed outside the room. 3. A ventilation duct formed of a porous thin plate is formed inside the duct, and a ventilation passage is formed around the outside of the duct.
2. The muffler type air supply port according to claim 1, wherein a muffling member is provided between an outer peripheral surface of an end portion and an inner peripheral surface of the duct, and an open end is closed by a flat plate to which a muffling material is attached. 4. A system comprising: a first muffling member fitted to an outer periphery of a frame; and a second muffling member fitted to an inner periphery of a duct, wherein the second muffling member is provided in a chamber of the duct. The silencing type air supply port according to claim 1, wherein the silencing type air supply port is slidably moved with respect to the first silencing member according to a distance between an outdoor hood provided outside and the frame. 5. A third noise reduction member fitted to an inner peripheral portion of a duct, and a fourth noise reduction member fitted between an inner peripheral portion of the third noise reduction member and an outer peripheral portion of the frame. The muffler type air supply port according to claim 1, wherein the fourth muffling member is provided so as to protrude into an outdoor hood provided outside the duct.