Outdoor Food

Abstract

To provide an outdoor hood which is installed in a simplified manner and secures appropriate arrangement of a sound absorptive material.SOLUTION: A base plate 10 which has a through-hole 10a on a position of an exhaust port of a duct opened on an outer wall of a building is fixed along a wall surface of the outer wall with a fixing tool. An air path is formed between the base plate and a hood cover 20 by attaching the hood cover onto the base plate and exhaust discharged from the exhaust port is guided to an outlet through the air path. Further, a base sound absorptive material 17 which absorbs sound in the air path is laid on a surface of the air path side of the base plate. Then, the base sound absorptive material is fixed so as to be detachment-unable to the base plate and, on a portion overlapped with a part 10b to be fixed which is fixed with the fixing tool on the base plate, an omitted part 17b in which laying of the base sound absorptive material is omitted is provided. Thus, the base plate can be fixed to the outer wall with the fixing tool in such a state that the base sound absorptive material is fixed as it is and can prevent attachment of the base sound absorptive material from being forgotten.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an outdoor hood that is installed to cover the exhaust port of a duct that opens into the exterior wall of a building. [Background technology]

[0002] Outdoor hoods are known that are installed to cover exhaust ports of ducts that open into the exterior wall of a building to prevent wind and rain from entering the exhaust port. The exhaust air discharged from the exhaust port is guided by an air passage inside the outdoor hood and blown out through an air outlet. When installing the outdoor hood, it is common to first secure a base plate with a through hole at the position of the exhaust port along the exterior wall surface with screws or the like, and then attach a hood cover to the base plate, thereby forming an air passage between the base plate and the hood cover.

[0003] In such outdoor hoods, it has been proposed to lay sound-absorbing material on the surface of the base plate facing the air passage or on the inner surface of the hood cover in order to reduce noise that leaks from indoors to outdoors via ducts or air passages, or noise that reverberates from outdoors to indoors (for example, Patent Document 1). Thick sound-absorbing material is often used, and since it is difficult to fix the base plate to the exterior wall by turning up parts of the sound-absorbing material, a configuration has been adopted in which the sound-absorbing material is made detachable from the base plate, and after the base plate is fixed to the exterior wall, the sound-absorbing material is layered on the base plate and the hood cover is attached. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-26176 Summary of the Invention [Problem to be solved by the invention]

[0005] However, as described above, conventional outdoor hoods have sound-absorbing material that can be detached from the base plate, and the installation work is time-consuming because the sound-absorbing material needs to be aligned with the base plate, and there are also problems such as forgetting to attach the sound-absorbing material or getting the front and back of the sound-absorbing material wrong.

[0006] This invention has been made in response to the above-mentioned problems in the conventional technology, and aims to provide technology that simplifies the installation work of outdoor hoods and can ensure appropriate placement of sound-absorbing material. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the outdoor hood of the present invention employs the following configuration: An outdoor hood is installed to cover an exhaust port of a duct opening into an exterior wall of a building, and has an internal air passage that guides exhaust air discharged from the exhaust port to an air outlet, a base plate having a through hole at the position of the exhaust port and fixed by a fixture along the wall surface of the outer wall; a hood cover that is attached to the base plate to form the air passage between the base plate and the hood cover; a base sound-absorbing material laid on the surface of the base plate facing the air passage, which absorbs sound from the air passage; Equipped with The base sound absorbing material is fixed to the base plate in an undetachable manner, An omitted portion is provided at a location of the base plate that overlaps with a fixed portion fixed by the fixing tool, where the base sound absorbing material is omitted. It is characterized by:

[0008] In such an outdoor hood of the present invention, the fixed portion of the base plate is exposed and not covered by the base sound-absorbing material, so that the base plate can be fixed to the exterior wall with a fastener while the base sound-absorbing material remains attached to the base plate (without removing the base sound-absorbing material from the base plate), which simplifies the installation work of the outdoor hood and makes it possible to prevent forgetting to attach the base sound-absorbing material. In addition, unlike when the base sound-absorbing material is placed on a fastener that secures the base plate without providing the omitted portion of the present invention, the thickness of the fastener does not cause the base sound-absorbing material to float off the base plate.

[0009] The outdoor hood of the present invention described above is provided with a cover sound-absorbing material that is laid on the inner surface of the hood cover to absorb noise in the air duct, and when the hood cover is attached to the base plate, the cover sound-absorbing material may shield the omitted portion from the air duct.

[0010] In this way, even if an omitted portion is provided in the base sound-absorbing material, by attaching the base cover to the base plate, the omitted portion can be compensated for by the cover sound-absorbing material, thereby making it possible to suppress a decrease in the performance of absorbing noise in the air duct.

[0011] In such an outdoor hood of the present invention, the omitted portion may be located on the opposite side of the exhaust port from the air outlet.

[0012] Noise generated indoors and released from the duct's exhaust port travels along the air path toward the outlet and leaks out through the outlet, so the side opposite the outlet from the exhaust port does not contribute much to noise reduction. By providing an omission in a position that contributes little to noise reduction, it is possible to prevent the omission from reducing noise reduction performance.

[0013] In addition, in such an outdoor hood of the present invention, the base sound-absorbing material may have a front and back side in relation to the base plate.

[0014] Even if the base sound-absorbing material has a front and back, it cannot be removed from the base plate, so workers installing the outdoor hood will not mistakenly install the base sound-absorbing material upside down, ensuring proper placement of the base sound-absorbing material.As a result, even if the performance of absorbing noise in the air duct changes depending on the positioning of the front and back of the base sound-absorbing material, it is possible to ensure that performance is maintained. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is an exploded perspective view showing a method for installing the outdoor hood 5 of the present embodiment. [Figure 2] 2 is a vertical cross-sectional view showing the internal structure of an outdoor hood 5 installed on the exterior wall 1 of a building. [Figure 3] FIG. 2 is a perspective view showing the shapes of a base sound-absorbing material 17 and a cover sound-absorbing material 22 of the present embodiment. [Figure 4] 10 is a vertical cross-sectional view showing the positional relationship between a notched portion 17b of a base sound-absorbing material 17 and a cover sound-absorbing material 22. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0016] FIG. 1 is an exploded perspective view showing a method for installing an outdoor hood 5 according to this embodiment. In the illustrated example, a duct 3 is inserted from the indoor side into a duct hole 2 provided in an exterior wall 1 of a building, and an exhaust port 3a at the end of the duct 3 opens into the exterior wall 1. When installing the outdoor hood 5 that covers this exhaust port 3a, first, a base plate 10 is fixed along the surface of the exterior wall 1. The base plate 10 is made of sheet metal and has a through-hole 10a at the position of the exhaust port 3a. After aligning the exhaust port 3a with the through-hole 10a, the base plate 10 is first fixed at two locations on the upper left and right sides using fasteners such as screws 11. Note that the fasteners are not limited to screws 11 and may be nuts for anchors or the like.

[0017] The hood cover 20 is then attached to the base plate 10. The hood cover 20 is formed from sheet metal and has a front surface 20a facing the exhaust port 3a, left and right side surfaces 20b and 20c relative to the front surface 20a, and a top surface 20d, forming a roughly rectangular box shape with the surface facing the base plate 10 and the bottom surface open. Although shown in FIG. 1 as being separated from the hood cover 20, a gallery 30 is fixed in advance, covering the bottom surface of the hood cover 20. The gallery 30 has multiple air direction plates 30a arranged in parallel, and is joined to the left and right side surfaces 20b and 20c of the hood cover 20 by spot welding or screws (not shown).

[0018] Furthermore, a groove 21 extending in the left-right direction is formed on the top surface 20d of the hood cover 20 by recessing it from the inside to the outside. On the other hand, a flange 12 is provided on the upper end of the base plate 10 by bending it toward the hood cover 20, and a ridge 13 extending in the left-right direction is formed by protruding upward from this flange 12.

[0019] When attaching the hood cover 20 to the base plate 10, the upper part is positioned by fitting the protrusions 13 of the flange 12 into the grooves 21 on the upper surface 20d, and then the lower part is aligned and fixed to the exterior wall 1 with fixing devices such as screws 11. In this embodiment, the gallery 30, which is fixed to the hood cover 20 in advance, is fastened together with the base plate 10 at two locations on the left and right sides of the lower part with screws 11.

[0020] When the hood cover 20 is attached in this manner, the surface of the base plate 10 opposite the exterior wall 1 is covered by the hood cover 20, and an air passage (described later) is formed between the base plate 10 and the hood cover 20, and the exhaust air discharged from the exhaust port 3a passes through the air passage and is guided to the air outlet at the lower end. The exhaust air blown out from the air outlet is then directed in a direction away from the exterior wall 1 (forward) by passing between the air direction vanes 30a of the gallery 30.

[0021] FIG. 2 is a vertical cross-sectional view showing the internal structure of the outdoor hood 5 installed on the exterior wall 1 of a building. The figure shows a cross section of the outdoor hood 5 cut along a vertical plane passing through the central axis of the duct 3. In the illustrated example, the through hole 10a of the base plate 10 is larger than the exhaust port 3a of the duct 3, and the through hole 10a and the exhaust port 3a are connected by an adapter 14. The adapter 14 is cylindrical and has a smaller diameter than the duct 3, and one end is provided with a flange portion whose outer diameter is larger than the through hole 10a. The other end of the adapter 14 is inserted through the through hole 10a and the exhaust port 3a, and a sealant 15 is interposed between the inner periphery of the duct 3 and the cylindrical outer periphery of the adapter 14. In this embodiment, a caulking material is used as the sealant 15. However, this is not limited to this, and any other suitable material, such as an O-ring, can be used as long as it has a sealing function.

[0022] When the hood cover 20 is attached to the base plate 10, the aforementioned air passage 6 is formed inside the outdoor hood 5. Exhaust air discharged from the exhaust port 3a of the duct 3 flows into the outdoor hood 5 through the through-holes 10a, is guided along the air passage 6, and is blown out from the air outlet 7 at the lower end. This air outlet 7 is covered by a gallery 30, which has multiple parallel air deflectors 30a formed on the gallery 30 by cutting and raising a plate-like member. The air deflectors 30a are inclined downward from the base plate 10 side toward the front surface 20a of the hood cover 20, and exhaust air passing between the air deflectors 30a is blown out in a direction away from the exterior wall 1 (to the left in the figure). This prevents the exterior wall 1 from becoming dirty with exhaust air.

[0023] In addition, a dripping board 16 is provided at the lower end of the base plate 10, with an inclination that descends toward the front surface 20a of the hood cover 20. This dripping board 16 directs water droplets, such as rainwater, dripping from the outdoor hood 5 away from the exterior wall 1, thereby preventing the exterior wall 1 from becoming soiled.

[0024] In such an outdoor hood 5, noise may leak from the indoors to the outdoors via the duct 3 and the air passage 6. For example, when noise is generated by a clothes dryer or a heater connected upstream of the duct 3, the noise travels through the duct 3 and the air passage 6 along with the exhaust air, and leaks out from the air outlet 7. In addition, outdoor noise may resonate indoors from the air outlet 7 via the air passage 6 and the duct 3. Therefore, to reduce such noise, a base sound-absorbing material 17 is provided on the surface of the base plate 10 facing the air passage 6, and a cover sound-absorbing material 22 is provided on the inner surface of the hood cover 20 (inside the front surface 20a and the top surface 20d). In other words, the air passage 6 is formed between the base sound-absorbing material 17 and the cover sound-absorbing material 22.

[0025] Base sound-absorbing material 17 has ventilation holes 17a that surround through-hole 10a of base plate 10. Noise emitted together with exhaust air from exhaust port 3a of duct 3 passes through through-hole 10a and ventilation holes 17a and enters air passage 6, as indicated by the dashed arrows in the figure. First, the noise hits cover sound-absorbing material 22, where a portion of the noise is absorbed within cover sound-absorbing material 22. The noise reflected by cover sound-absorbing material 22 then hits base sound-absorbing material 17, where a portion of the noise is absorbed within base sound-absorbing material 17. The noise reflected by base sound-absorbing material 17 again hits cover sound-absorbing material 22, where a portion of the noise is absorbed within cover sound-absorbing material 22. By repeating this process, noise leaking from air outlet 7 is reduced.

[0026] Porous materials such as glass wool and urethane foam are used for the base sound-absorbing material 17 and the cover sound-absorbing material 22. When sound penetrates and diffuses into a porous material, the air vibrations are transmitted to the air in the pores within the material, and friction and viscous resistance on the surfaces of the pores convert some of the sound energy into thermal energy, producing a sound-absorbing effect. In this embodiment, the base sound-absorbing material 17 and the cover sound-absorbing material 22 are made by overlapping two types of material, and by placing the material with the highest sound-absorbing effect on the air duct 6 side, noise in the air duct 6 can be effectively absorbed.

[0027] Furthermore, when the outdoor hood 5 of this embodiment is shipped from the factory, the base sound-absorbing material 17 is fixed in an undetachable manner to the base plate 10 using adhesive, double-sided tape, etc. Similarly, the cover sound-absorbing material 22 is fixed in an undetachable manner to the hood cover 20 using adhesive, double-sided tape, etc.

[0028] Fig. 3 is a perspective view showing the shapes of the base sound-absorbing material 17 and the cover sound-absorbing material 22 of this embodiment. Fig. 3(a) shows the state before the cover sound-absorbing material 22 is fixed to the hood cover 20, and Fig. 3(b) shows the state before the base sound-absorbing material 17 is fixed to the base plate 10.

[0029] 3(a), the cover sound-absorbing material 22 is made up of a front surface portion 22a corresponding to the front surface 20a of the hood cover 20 and an upper surface portion 22b corresponding to the upper surface 20d, and does not have side surfaces corresponding to the left and right side surfaces 20b, 20c. This is because noise absorption and reflection in the air passage 6 occurs mainly in the front surface portion 22a of the cover sound-absorbing material 22 and the base sound-absorbing material 17. By omitting the side surfaces of the cover sound-absorbing material 22, it is possible to ensure the cross-sectional area of ​​the air passage 6 while avoiding an increase in the size of the outdoor hood 5. Note that the cover sound-absorbing material 22 may have side surfaces corresponding to the left and right side surfaces 20b, 20c of the hood cover 20.

[0030] 3(b), the base sound-absorbing material 17 has vent holes 17a formed at the positions of the through holes 10a of the base plate 10, and the diameter of the vent holes 17a is slightly larger than the diameter of the through holes 10a. Also, the vertical dimension of the lower part of the base sound-absorbing material 17 is shorter than that of the base plate 10, so that the base sound-absorbing material 17 does not overlap a pair of lower screw holes 10c formed at both the left and right ends of the lower part of the base plate 10.

[0031] Furthermore, because the base sound-absorbing material 17 of this embodiment is thick, it is difficult to bend and turn up a portion of the base plate 10 while it is fixed to the base plate 10, and then fix the upper part of the base plate 10 to the exterior wall 1 with the screws 11. Therefore, in order to omit the installation of the base sound-absorbing material 17, notches 17b are provided at locations that overlap with a pair of upper screw holes 10b formed at both ends of the upper part of the base plate 10. Therefore, the upper part of the base plate 10 can be easily fixed to the exterior wall 1 with the screws 11 while the base sound-absorbing material 17 remains fixed. The upper screw holes 10b of this embodiment correspond to the "fixed portion" of the present invention. The notches 17b of this embodiment correspond to the "omitted portion" of the present invention.

[0032] The cutout 17b of the base sound-absorbing material 17 is located on the opposite side of the through-hole 10a (exhaust port 3a of duct 3) in the base plate 10 from the outlet 7 at the end of the air passage 6. Noise emitted together with the exhaust air from the outlet 3a travels along the air passage 6 toward the outlet 7 and leaks out from the outlet 7, so the side opposite the outlet 7 from the exhaust port 3a does not contribute much to noise reduction. By providing the cutout 17b in this position that contributes little to noise reduction, it is possible to prevent the cutout 17b from reducing the noise reduction performance. Furthermore, in the outdoor hood 5 of this embodiment, the cutout 17b of the base sound-absorbing material 17 is complemented by the cover sound-absorbing material 22.

[0033] 4 is a vertical cross-sectional view showing the positional relationship between the notch 17b of the base sound-absorbing material 17 and the cover sound-absorbing material 22. The figure shows a cross-section of the outdoor hood 5 cut along a vertical plane that passes through the center of the upper screw hole 10b of the base plate 10 and is perpendicular to the exterior wall 1, with the periphery of the notch 17b enlarged. As mentioned above, the notch 17b of the base sound-absorbing material 17 is provided at a location that overlaps with the upper screw hole 10b of the base plate 10. The cover sound-absorbing material 22 also has a front surface portion 22a that corresponds to the front surface 20a of the hood cover 20 and an upper surface portion 22b that corresponds to the upper surface 20d.

[0034] As shown in the figure, when the hood cover 20 is attached to the base plate 10, the end face of the upper surface portion 22b of the cover sound-absorbing material 22 facing the base plate 10 is close to the base sound-absorbing material 17, shielding the cutout portion 17b from the air passage 6. In this way, even if the base sound-absorbing material 17 has the cutout portion 17b, the upper surface portion 22b of the cover sound-absorbing material 22 complements the cutout portion 17b, thereby suppressing a decrease in the performance of absorbing noise in the air passage 6.

[0035] As described above, in the outdoor hood 5 of this embodiment, the base sound-absorbing material 17 is fixed non-detachably to the base plate 10 with adhesive, double-sided tape, or the like, and a notch 17b is provided at the location overlapping the upper screw hole 10b of the base plate 10 to omit the installation of the base sound-absorbing material 17. Because the upper screw hole 10b of the base plate 10 is exposed and not covered by the base sound-absorbing material 17, the upper part of the base plate 10 can be fixed to the exterior wall 1 with the screw 11 while the base sound-absorbing material 17 remains fixed to the base plate 10 (without removing the base sound-absorbing material 17 from the base plate 10). This simplifies the installation work of the outdoor hood 5 and makes it possible to prevent forgetting to attach the base sound-absorbing material 17. In addition, unlike the case of this embodiment in which the notch 17b is not provided and the base sound-absorbing material 17 is overlapped on the screw 11 that secures the base plate 10, the thickness of the head of the screw 11 does not cause the base sound-absorbing material 17 to float above the base plate 10.

[0036] In particular, the base sound-absorbing material 17 of this embodiment is made by overlapping two types of material, and although there is a distinction between the front and back in relation to the base plate 10, the base sound-absorbing material 17 cannot be removed from the base plate 10, so that workers installing the outdoor hood 5 will not mistakenly install the base sound-absorbing material 17 upside down, ensuring appropriate positioning of the base sound-absorbing material 17. As a result, even if the performance of absorbing noise from the air duct 6 changes depending on the positioning of the front and back of the base sound-absorbing material 17, it is possible to ensure performance.

[0037] Furthermore, in the outdoor hood 5 of this embodiment, with the hood cover 20 attached to the base plate 10, the upper surface 22b of the cover sound-absorbing material 22 shields the cutout 17b from the air passage 6. In this way, even if the base sound-absorbing material 17 has the cutout 17b, the upper surface 22b of the cover sound-absorbing material 22 can compensate for the cutout 17b, making it possible to suppress a decrease in the performance of absorbing noise in the air passage 6.

[0038] Furthermore, the notch 17b in this embodiment is located on the opposite side of the outlet 7 from the exhaust port 3a of the duct 3. The side of the exhaust port 3a opposite the outlet 7 does not contribute much to reducing noise that is emitted from the exhaust port 3a, travels along the air passage 6 toward the outlet 7, and leaks out. By providing the notch 17b in such a position, it is possible to prevent a decrease in noise reduction performance.

[0039] Although the outdoor hood 5 of this embodiment has been described above, the present invention is not limited to the above embodiment, and can be embodied in various forms without departing from the gist of the present invention.

[0040] For example, in the above-described embodiment, by providing notches 17b at both the left and right ends of the upper part of base sound-absorbing material 17, the placement of base sound-absorbing material 17 in the area overlapping with upper screw holes 10b of base plate 10 is omitted. However, instead of providing notches 17b, the vertical dimension of the upper part of base sound-absorbing material 17 may be made shorter than that of base plate 10, thereby omitting the placement of base sound-absorbing material 17 in the area overlapping with upper screw holes 10b of base plate 10. In this case, the entire portion of the upper part of base plate 10 where the placement of base sound-absorbing material 17 is omitted may be shielded from air passage 6 by the end face of upper surface portion 22b of cover sound-absorbing material 22 on the base plate 10 side.

[0041] In the above-described embodiment, the base plate 10 is provided with a pair of upper screw holes 10b and a pair of lower screw holes 10c. However, the screw holes in the base plate 10 are not limited to this, and a pair of central screw holes may be provided on both the left and right ends of the base plate 10 near the center in the vertical direction. Then, a central cutout portion may be provided at each of the central screw holes to eliminate the need to install the base sound-absorbing material 17, and the cover sound-absorbing material 22 may be provided with side portions corresponding to the left and right side surfaces 20b, 20c of the hood cover 20, so that the side portions of the cover sound-absorbing material 22 may shield the central cutout portion from the air passage 6 when the hood cover 20 is attached to the base plate 10.

[0042] In the above-described embodiment, the base sound-absorbing material 17 is made by overlapping two types of material, and therefore has a front and back. However, the front and back of the base sound-absorbing material 17 may be distinguished from the above. For example, even if a water-repellent finish is applied to one side of the base sound-absorbing material 17 facing the air passage 6 in order to prevent it from getting wet due to condensation of exhaust air discharged from the exhaust port 3a, the base sound-absorbing material 17 will still have a front and back in relation to the base plate 10. [Explanation of symbols]

[0043] 1...exterior wall, 2...duct hole, 3...duct, 3a...exhaust port, 5...outdoor hood, 6...air duct, 7...air outlet, 10...base plate, 10a...through hole, 10b...Upper screw hole, 10c...Lower screw hole, 11...Screw, 12...flange, 13...protrusion, 14...adapter, 15...Packing, 16...Draining board, 17...Base sound absorbing material, 17a...ventilation hole, 17b...cutout portion, 20...hood cover, 20a...front, 20b...left side, 20c...right side, 20d...top surface, 21...groove, 22...cover sound absorbing material, 22a...front portion, 22b...top portion, 30...gallery, 30a...Wind direction plate.

Claims

1. An outdoor hood is installed to cover an exhaust port of a duct opening into an exterior wall of a building, and has an internal air passage that guides exhaust air discharged from the exhaust port to an air outlet, a base plate having a through hole at the position of the exhaust port and fixed by a fixture along the wall surface of the outer wall; a hood cover that is attached to the base plate to form the air passage between the base plate and the hood cover; a base sound-absorbing material laid on the surface of the base plate facing the air passage, which absorbs sound from the air passage; Equipped with The base sound absorbing material is fixed to the base plate in an undetachable manner, A fixed portion of the base plate, which is fixed by the fixing device, is located inside the outdoor hood, and an omitted portion is provided at a location overlapping the fixed portion, where the installation of the base sound-absorbing material is omitted. An outdoor hood characterized by:

2. The outdoor hood of claim 1, A cover sound absorbing material is provided on the inner surface of the hood cover to absorb noise from the air passage, When the hood cover is attached to the base plate, the cover sound absorbing material shields the omitted portion from the air passage. An outdoor hood characterized by:

3. The outdoor hood according to claim 1 or 2, The omitted portion is located on the opposite side of the exhaust port from the blow-out port. An outdoor hood characterized by:

4. The outdoor hood according to any one of claims 1 to 3, The base sound absorbing material has a front and back in relation to the base plate. An outdoor hood characterized by:

Images