Ventilation system

Abstract

To provide a ventilation device that is compact yet capable of reducing noise. [Solution] The ventilation device 10 is characterized by comprising a substantially cylindrical mounting frame 12 that penetrates a partition wall 100 separating the inside and outside of a building, a ventilation fan 14 attached to the indoor end of the mounting frame 12, and a sound-absorbing member 38 made of a sound-absorbing material that covers at least a part of the inner circumferential surface of the mounting frame 12. The sound-absorbing member 38 is in the form of a sheet or board made of a perforated material, and the mounting frame 12 may be capable of attaching and detaching the sound-absorbing member 38 from the mounting frame 12 while the ventilation fan 14 is attached to the mounting frame 12.

Description

Technical Field

[0004] , , , , , , ,

[0006] , , , ,

[0005] , , , , , ,

[0001] This specification discloses a ventilation device including a mounting frame penetrating a partition wall and a ventilation fan attached to the mounting frame.

Background Art

[0002] Conventionally, a ventilation device including a mounting frame penetrating a partition wall that separates the inside and outside of a building and a ventilation fan attached to the mounting frame has been known. Such a ventilation device generates noise when it is driven. Also, external noise may enter the room through a through-hole formed in the partition wall. Therefore, conventionally, techniques for reducing the noise of the ventilation device have been proposed.

[0003] For example, Patent Document 1 discloses a ventilation device having a main body frame attached to the indoor side of a partition wall, a wind tunnel fixed to the main body frame, and an impeller disposed in the wind tunnel. In Patent Document 1, a sound-absorbing member is attached inside the main body frame in order to reduce noise. According to such a technique, noise can be reduced to some extent.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the technique of Patent Document 1, the mounting frame is directly attached to the indoor side surface of the partition wall. And a sound-absorbing member is provided only on this mounting frame. Therefore, the area of the sound-absorbing member is small, and the noise cannot be sufficiently reduced. Also, in Patent Document 1, the reduction of noise entering from the outside has not been sufficiently studied.

[0006] Furthermore, in the ventilation device described in Patent Document 1, it is conceivable to increase the dimensions of the mounting frame and thereby increase the installation area of ​​the sound-absorbing member. However, this would lead to another problem: an increase in the amount the ventilation device protrudes into the room.

[0007] Therefore, this specification discloses a ventilation device that is compact yet capable of reducing noise. [Means for solving the problem]

[0008] The ventilation device disclosed herein is characterized by comprising: a substantially cylindrical mounting frame that penetrates a partition wall separating the interior and exterior of a building; a ventilation fan attached to the interior end of the mounting frame; and a sound-absorbing member made of a sound-absorbing material that covers at least a portion of the inner surface of the mounting frame.

[0009] This configuration prevents an increase in the amount the ventilation device protrudes into the indoor environment while ensuring sufficient surface area for the sound-absorbing material. As a result, noise can be reduced while keeping the ventilation device compact.

[0010] In this case, the mounting frame may be designed so that the sound-absorbing member can be attached to and detached from the mounting frame while the ventilation fan is still attached to the mounting frame.

[0011] This configuration significantly simplifies the process of replacing sound-absorbing components.

[0012] Furthermore, the mounting frame may include an access opening formed on its outer surface through which the sound-absorbing member can pass.

[0013] By providing access openings on the periphery of the mounting frame, the sound-absorbing material can be moved in and out of the mounting frame without removing the ventilation fan from the mounting frame.

[0014] Furthermore, the mounting frame may have a rectangular tubular body and an internal frame unit arranged inside the body and composed of a combination of multiple beam members and column members, and the sound-absorbing member may be held between the body and the internal frame unit.

[0015] This configuration eliminates the need for specialized tools or complex procedures to replace sound-absorbing materials, thus simplifying the replacement process.

[0016] Furthermore, the peripheral wall of the mounting frame may have projections protruding from its inner surface, and the sound-absorbing member may have fixing holes through which these projections are inserted.

[0017] This configuration eliminates the need for an internal frame unit, allowing for a lighter and lower-cost ventilation fan.

[0018] Furthermore, the mounting frame comprises a rectangular tubular body, an internal frame unit arranged inside the body and composed of a combination of multiple beam members and column members, and an access opening located outside the ventilation fan on the indoor end face of the mounting frame and communicating with the gap between the body and the internal frame unit. The sound-absorbing member is held between the body and the internal frame unit and may also be slidable in and out of the mounting frame through the access opening.

[0019] By allowing the sound-absorbing material to slide in and out of the mounting frame via the access opening, the size of the access opening can be reduced.

[0020] Furthermore, the mounting frame may have a rectangular tubular body, an access opening formed on the outer surface of the body through which the sound-absorbing member can pass, a plurality of brackets attached to the inner surface of the body, and a stay whose ends are screwed into two different brackets, and the sound-absorbing member may be held between the inner surface of the body and the stay.

[0021] In this case, the sound-absorbing material can be placed inside the mounting frame before the stays can be screwed in. Furthermore, this procedure simplifies the process of placing the sound-absorbing material. [Effects of the Invention]

[0022] According to the technology disclosed in this specification, the ventilation device can be kept small while reducing noise.

Brief Description of the Drawings

[0023] [Figure 1] It is a schematic exploded perspective view of the ventilation device. [Figure 2] It is a schematic cross-sectional view of the ventilation device. [Figure 3] It is a perspective view of the mounting frame of the ventilation device in another example. [Figure 4] It is an exploded perspective view of the mounting frame in FIG. 3. [Figure 5] It is a schematic cross-sectional view of the mounting frame in FIG. 3. [Figure 6] It is an exploded perspective view of the mounting frame of the ventilation device in another example. [Figure 7] It is a cross-sectional view of the mounting frame in FIG. 6. <m: [Figure 8] It is a perspective view of the mounting frame of the ventilation device in another example. [Figure 9] It is a perspective view of the mounting frame of the ventilation device in another example. [Figure 10] It is an exploded perspective view of the mounting frame in FIG. 9. <00,00109>It is a schematic broken perspective view of the ventilation device having a sound-absorbing chamber. [Figure 12] It is an exploded perspective view of the mounting frame of the ventilation device in another example, [Figure 13] It is a cross-sectional view of the mounting frame in FIG. 12.

Embodiments for Carrying Out the Invention

[0024] Hereinafter, the configuration of the ventilation device 10 will be described with reference to the drawings. FIG. 1 is a schematic exploded perspective view of the ventilation device 10. Also, FIG. 2 is a schematic cross-sectional view of the ventilation device 10. In the following, for convenience, when viewed from the mounting frame 12, the outdoor side is referred to as "front" and the indoor side is referred to as "rear". [[ID=W3]]

[0025] This ventilation device 10 is a ventilation device that discharges indoor air to the outside. The ventilation device 10 is broadly divided into a mounting frame 12 and a ventilation fan 14. The mounting frame 12 is roughly rectangular and cylindrical in shape, having a top plate 32, a bottom plate 34, and a pair of side plates 36. When the top plate 32, bottom plate 34, and side plates 36 are not distinguished, they are referred to as "peripheral walls 32, 34, 36". A sound-absorbing member 38 is arranged inside the mounting frame 12, which will be described later.

[0026] As shown in Figure 2, the mounting frame 12 is fixed to the partition wall 100 by being inserted through the ventilation hole 102 formed in the partition wall 100. Therefore, the mounting frame 12 penetrates the partition wall 100. The partition wall 100 is a wall that separates the inside and outside of the building.

[0027] The ventilation fan 14 forcibly generates airflow by rotating an impeller (not shown). The impeller and the motor unit 22 that rotates the impeller are located inside a wind tunnel 18. The wind tunnel 18 is roughly cylindrical and extends in the front-to-back direction. A flange 16 protrudes radially outward from the front edge of the wind tunnel 18. The motor unit 22 is fixed to the flange 16 via a support arm 20. Although only one support arm 20 is shown in Figure 1, in reality, the motor unit 22 is supported by multiple support arms 20. This ventilation fan 14 is attached to the rear end of a mounting frame 12. For example, the flange 16 is fastened to the rear end surface of the mounting frame 12 with screws (not shown).

[0028] Incidentally, the ventilation fan 14 generates noise when it is driven. In addition, outdoor noise may enter the building through the ventilation opening 102. As a result, the quietness of the building is reduced due to this driving noise and outdoor noise. To suppress this reduction in quietness, some have proposed placing a sound-absorbing chamber 90 between the mounting frame 12 and the ventilation fan 14. Figure 11 is a schematic cross-sectional perspective view of a ventilation device 10* having a sound-absorbing chamber 90. The sound-absorbing chamber 90 has a wall 92 that bulges inward to locally narrow the air passage. As the air passes through this sound-absorbing chamber 90, it is compressed and expanded. This causes decompression, reflection, and resonance of sound waves, attenuating the energy of the sound waves and reducing noise.

[0029] However, as is clear from Figure 11, if a sound-dampening chamber 90 is installed, the ventilation device 10* becomes larger. In particular, the amount of the ventilation device 10* protruding into the room increases, significantly impairing the interior design. Furthermore, the overall size of the ventilation device 10* worsens the ease of installation and maintenance.

[0030] Therefore, in the ventilation device 10 disclosed herein, a sound-absorbing chamber 90 is not used, and the ventilation fan 14 is directly attached to the mounting frame 12, with a sound-absorbing member 38 placed inside the mounting frame 12. The sound-absorbing member 38 is, for example, a sheet-like or board-like member with sound-absorbing properties. Such a sound-absorbing member 38 is made of a porous material with a certain degree of flexibility, such as glass wool or urethane sponge. The configuration of the sound-absorbing member 38 is not particularly limited. Generally, in order to eliminate reflected sound, the sound-absorbing member 38 is required to have a thickness of at least 1 / 4 of the wavelength of the sound in question. Based on this, the thickness of the sound-absorbing member 38 may be, for example, 10 mm or more and 100 mm or less, and particularly 30 mm or more and 80 mm or less.

[0031] The sound-absorbing member 38 is positioned to cover the inner circumferential surface of the mounting frame 12. For example, the sound-absorbing member 38 covers the inner surfaces of the top plate 32, the bottom plate 34, and the pair of side plates 36. In this case, the sound-absorbing member 38 may be bonded to the circumferential walls 32, 34, and 36 using adhesive, or it may be fastened using bolts or rivets. Alternatively, a member for holding the sound-absorbing member 38 (for example, a rail extending in the front-rear direction) may be provided inside the mounting frame 12, and the sound-absorbing member 38 may be held by this holding member.

[0032] Furthermore, the sound-absorbing member 38 may cover the entire inner surface of the mounting frame 12, or it may cover only a portion of the inner surface of the mounting frame 12. When the entire inner surface of the mounting frame 12 is covered with the sound-absorbing member 38, the area of ​​the sound-absorbing member 38 increases, and sound reflection on the inner surface of the mounting frame 12 can be prevented, resulting in high sound-reducing performance. Alternatively, if sufficient sound-reducing performance can be obtained, the sound-absorbing member 38 may be configured to cover only a portion of the inner surface of the mounting frame 12 (for example, covering only the indoor half of the inner surface of the mounting frame 12). In this case, the amount of sound-absorbing member 38 used can be reduced, resulting in cost savings.

[0033] In any case, by providing the sound-absorbing member 38 inside the mounting frame 12 that penetrates the partition wall 100, noise can be effectively reduced while preventing the ventilation device 10 from becoming larger. Specifically, by providing the sound-absorbing member 38 inside the mounting frame 12, the sound-absorbing chamber 90 can be eliminated, and the ventilation device 10 can be made smaller. Furthermore, in order to sufficiently reduce noise, it is necessary to secure a sufficient area for the sound-absorbing member 38. If this area of ​​the sound-absorbing member 38 is to be secured only by components placed on the indoor side (ventilation fan 14 and indoor-installed chamber), the amount of the entire ventilation device 10 protruding into the indoor side will increase. On the other hand, in this example, the sound-absorbing member 38 is provided in the mounting frame 12 that penetrates the partition wall 100. In this case, the sound-absorbing member 38 can be placed in the part corresponding to the thickness of the partition wall 100 and in the part of the mounting frame 12 that protrudes outdoors. As a result, according to this example, a sufficient area of ​​the sound-absorbing member 38 can be secured without making the indoor-installed parts of the ventilation device 10 larger.

[0034] Next, other examples of ventilation devices 10 will be described with reference to Figures 3 to 5. Figure 3 is a perspective view of the mounting frame 12 of another example of ventilation device 10, and Figure 4 is an exploded perspective view of this mounting frame 12. Figure 5 is a schematic cross-sectional view of the mounting frame 12.

[0035] As the ventilation device 10 operates, fine dust and oil droplets enter the inside of the mounting frame 12. This can cause the sound-absorbing material 38 installed inside the mounting frame 12 to become dirty. As the sound-absorbing material 38 becomes dirty, its sound-absorbing performance deteriorates. Therefore, the sound-absorbing material 38 needs to be replaced periodically.

[0036] In the case of the ventilation device 10 shown in Figures 1 and 2, the circumferential surface of the mounting frame 12 is completely closed. Therefore, each time the sound-absorbing member 38 was replaced, it was necessary to remove the ventilation fan 14 from the mounting frame 12. However, the ventilation fan 14 usually weighs several tens of kilograms, and multiple workers were required to attach and detach the ventilation fan 14. In addition, electrical wiring work was required each time the sound-absorbing member 38 was replaced, and consequently, each time the ventilation fan 14 was attached or detached.

[0037] Therefore, the ventilation device 10 in this example has an access opening 40 on the circumferential surface of the mounting frame 12 through which a sound-absorbing member 38 can pass. This will be explained in detail below. As shown in Figures 3 and 4, the mounting frame 12 is broadly divided into a main body 30 and an internal frame unit 50. The main body 30 is roughly rectangular in shape as a whole and has a top plate 32, a bottom plate 34, and a pair of side plates 36. The front and rear ends of the top plate 32 are bent downward to become the upper front wall 66 and upper rear wall 68, respectively. The rear end of the bottom plate 34 is bent upward to become the lower rear wall 64. Stud bolts 69 are provided on the upper rear wall 68 and the lower rear wall 64. The flange 16 of the ventilation fan 14 is screwed and fastened to the mounting frame 12 by these stud bolts 69.

[0038] The front and rear ends of the side plate 36 are bent inward toward the mounting frame 12, respectively, to form the lateral front wall 60 and lateral rear wall 62. An L-shaped bracket 37 is attached to the side plate 36. The mounting frame 12 is fixed to the bulkhead 100 by screwing this bracket 37 into the indoor side of the bulkhead 100. Therefore, the part of the mounting frame 12 that is behind this bracket 37 protrudes into the indoor side. An access opening 40 is formed in the area of ​​the side plate 36 that is behind the bracket 37.

[0039] The access opening 40 is an opening for inserting the sound-absorbing member 38 into the mounting frame 12 or removing the sound-absorbing member 38 from inside the mounting frame 12. The shape and size of the access opening 40 are not particularly limited as long as the sound-absorbing member 38 can pass through. In this example, the access opening 40 is roughly rectangular and occupies most of the area of ​​the side plate 36 that is exposed to the indoor side (for example, 70% or more).

[0040] The access opening 40 is covered by a detachable cover 42 attached to the side plate 36. The cover 42 is, for example, a flat plate member larger than the access opening 40 and is attached to the side plate 36 using screws or latches. In the case of Figure 3, the cover 42 is completely separated from the access opening 40. However, the access opening 40 may be opened and closed with the cover 42 still partially attached to the side plate 36. For example, if the periphery of the cover 42 is attached to the side plate 36 with screws, the access opening 40 may be opened by rotating the cover 42 around one screw while keeping that screw attached.

[0041] The internal frame unit 50 is a frame member positioned inside the main body 30. The internal frame unit 50 is composed of a combination of multiple beam members 52, 54, 56 and multiple column members 58, and is generally rectangular in shape. More specifically, the internal frame unit 50 has upper beam members 52 that form the four sides of the top surface, lower beam members 54 that form the three sides of the bottom surface, column members 58 that connect the upper beam members 52 and the lower beam members 54, and intermediate beam members 56 that connect two column members 58 that are arranged front to back.

[0042] The width and height of the internal frame unit 50 are smaller than those of the main body 30. Therefore, as shown in Figure 5, a small gap, or rather, a storage space 70, is formed between the main body 30 and the internal frame unit 50. The sound-absorbing member 38 is placed in this storage space 70. In other words, the sound-absorbing member 38 is sandwiched and held between the plate members 32, 34, 36 that make up the main body 30 and the beam members 52, 54, 56 or column members 58 that make up the internal frame unit 50.

[0043] Next, the procedure for replacing the sound-absorbing member 38 in the ventilation device 10 will be explained. As described above, if the ventilation device 10 is operated continuously after being attached to the partition wall 100, the sound-absorbing member 38 will gradually become dirty, and its sound-absorbing performance will decrease. Therefore, the sound-absorbing member 38 should be replaced at an appropriate time. In this case, the worker replaces the sound-absorbing member 38 while the ventilation fan 14 is still attached to the mounting frame 12.

[0044] Specifically, the worker first removes or rotates the cover 42 to open the access opening 40. Next, the sound-absorbing member 38 (hereinafter referred to as "side sound-absorbing member 38") positioned along the side plate 36 is removed from the access opening 40. Here, the sound-absorbing member 38 is simply sandwiched between the side plate 36 and the internal frame unit 50. In this case, the worker can remove the sound-absorbing member 38 from the mounting frame 12 by pulling it by hand. In other words, no special tools or complicated procedures are required to remove the sound-absorbing member 38. Furthermore, the sound-absorbing member 38 has appropriate flexibility. Therefore, by bending or curving the sound-absorbing member 38 as needed, it can easily pass through the access opening 40.

[0045] Once the side sound-absorbing members 38 can be removed, the worker then reaches their hand through the access opening 40 into the gap between the beam members 52, 56, 54 and removes the sound-absorbing members 38 along the top plate 32 and the sound-absorbing members 38 along the bottom plate 34 (hereinafter referred to as "upper sound-absorbing members 38" and "lower sound-absorbing members 38"). The upper sound-absorbing members 38 and the lower sound-absorbing members 38 are also only sandwiched between the main body 30 and the internal frame unit 50, so they can be easily removed by simply pulling them by hand.

[0046] Once all the sound-absorbing members 38 have been removed from the mounting frame 12, the worker then installs new sound-absorbing members 38. Specifically, the worker inserts the new sound-absorbing members 38 into the mounting frame 12 through the access opening 40 and places them between the main body 30 and the internal frame unit 50. After all the sound-absorbing members 38 have been installed, the worker attaches the cover 42 to the side plate 36 and closes the access opening 40. This completes the replacement of the sound-absorbing members 38.

[0047] As is clear from the above explanation, in this example, the sound-absorbing member 38 can be replaced while the ventilation fan 14 remains attached to the mounting frame 12. Furthermore, in this example, since the sound-absorbing member 38 is simply sandwiched between the main body 30 and the internal frame unit 50, no special tools or complex work are required to replace the sound-absorbing member 38. As a result, in this example, the replacement of the sound-absorbing member 38 can be simplified.

[0048] Next, other examples of the mounting frame 12 will be described with reference to Figures 6 and 7. Figure 6 is an exploded perspective view of another example of the mounting frame 12, and Figure 7 is a cross-sectional view of this mounting frame 12. This mounting frame 12 differs from the mounting frame 12 in Figures 3 to 5 in that the sound-absorbing member 38 (see Figure 7) is fixed to the mounting frame 12 by stud bolts 74. More specifically, the mounting frame 12 has a main body 30 but does not have an internal frame unit 50. Multiple stud bolts 74 (i.e., protrusions) are erected from the inner surfaces of the top plate 32, bottom plate 34, and a pair of side plates 36 that constitute the main body 30, as well as from the inner surface of the lid 42. Fixing holes 39 are formed in the corresponding locations of the sound-absorbing member 38 for passing the stud bolts 74 through. The sound-absorbing member 38 is fixed to the bottom plate 34 and side plates 36 by passing the stud bolts 74 through these fixing holes 39. Furthermore, the sound-absorbing member 38 covering the top plate 32 is fixed to the top plate 32 by inserting the stud bolt 74 through the fixing hole 39 and tightening the nut 76 (see Figure 7).

[0049] With this configuration, the internal frame unit 50 becomes unnecessary, making it possible to lighten and reduce the cost of the mounting frame 12. Also, since the sound-absorbing members 38 are fixed using stud bolts 74, the sound-absorbing members 38 can be subdivided. For example, in the examples in Figures 3 to 5, the sound-absorbing members 38 are sandwiched between the internal frame unit 50 and the main body 30, so the sound-absorbing members 38 need to be larger than the gap between the beams or columns of the internal frame unit 50. For this reason, in the examples in Figures 3 to 5, one surface was covered by one sound-absorbing member 38. On the other hand, in this example, one surface may be covered by multiple small sound-absorbing members 38. For example, the top plate 32 may be covered by multiple sound-absorbing members 38 that are smaller than the access opening 40. With this configuration, the size of each sound-absorbing member 38 can be reduced, so even if the sound-absorbing member 38 has poor flexibility, it can easily pass through the access opening 40.

[0050] Furthermore, in the above description, access openings 40 are provided only on the side panels 36. However, the location and number of access openings 40 may be changed as appropriate. For example, as shown in Figure 8, access openings 40 may be formed on each of the four surfaces of the side panels 36, the top panel 32, and the bottom panel 34. Alternatively, the cover 42 that covers the access openings 40 may be a door 44 connected to the main body 30 via a hinge (not shown). In this case, a latch mechanism (not shown) to maintain the door 44 in a closed state may be provided.

[0051] Next, another example of the ventilation device 10 will be described with reference to Figures 9 and 10. Figure 9 is a perspective view of the mounting frame 12 of another example of the ventilation device 10, and Figure 10 is an exploded perspective view of this mounting frame 12. In this mounting frame 12, the access opening 40 is provided on the rear end face (i.e., the indoor end face) rather than on the circumferential surface of the mounting frame 12.

[0052] More specifically, the mounting frame 12 comprises a main body 30 and an internal frame unit 50. The top plate 32, bottom plate 34, and side plates 36 that make up the main body 30 are all positioned at a predetermined distance from the internal frame unit 50, and their ends are folded inward as needed. The gap between the main body 30 and the internal frame unit 50 becomes a housing space 70 in which the sound-absorbing member 38 is placed.

[0053] As is clear from Figures 9 and 10, the rear ends of the top plate 32, bottom plate 34, and side plate 36 are not folded back toward the internal frame unit 50. Therefore, four access openings 40 are formed at the rear end of the mounting frame 12, surrounded by the rear edge of the main body 30 and the rear edge of the internal frame unit 50. These four access openings 40 are positioned to surround the ventilation fan 14. In other words, the four access openings 40 are provided in a position that allows access while the ventilation fan 14 is mounted on the mounting frame 12.

[0054] The sound-absorbing member 38 is slid into the housing space 70 through the four access openings 40. The mounting frame 12 has a cover 42 to cover the access openings 40. The cover 42 is, for example, a substantially flat plate-shaped member that is large enough to completely cover the access openings 40. One end of the cover 42 is folded back so as to overlap the circumferential surface of the main body 30. The cover 42 is screwed and fastened to the main body 30 at this folded portion.

[0055] When replacing the sound-absorbing member 38, the worker first removes the cover 42. Since both the cover 42 and the access opening 40 are located outside the ventilation fan 14, the cover 42 can be removed while the ventilation fan 14 remains attached to the mounting frame 12. The worker then pulls out the old sound-absorbing member 38 from the access opening 40, inserts the new sound-absorbing member 38 into the access opening 40, and slides it in. Finally, the worker attaches the cover 42 to the access opening 40, completing the replacement of the sound-absorbing member 38.

[0056] As is clear from the above explanation, in this example as well, the sound-absorbing member 38 can be replaced while the ventilation fan 14 is still attached to the mounting frame 12. Furthermore, in this example, the sound-absorbing member 38 is configured to be slid in. Therefore, the opening for replacing the sound-absorbing member 38 can be made smaller compared to the examples in Figures 3 to 8.

[0057] Next, another example of the ventilation device 10 will be described with reference to Figures 12 and 13. Figure 12 is an exploded perspective view of the mounting frame 12 of the ventilation device 10 of the other example, and Figure 13 is a cross-sectional view of this mounting frame 12. In this mounting frame 12, the access opening 40 is provided on the circumferential surface of the mounting frame 12. Although not shown in Figures 12 and 13, a cover 42 that detachably covers the access opening 40 is also provided.

[0058] Two brackets 80 are fixed to the side plate 36 of the mounting frame 12, spaced apart vertically. These brackets 80 are fixed to the side plate 36, for example, with rivets or bolts. Multiple screw holes 82 are formed in these brackets 80 for fastening the stays 84, which will be described later.

[0059] The mounting frame 12 further has a plurality of stays 84. Specifically, the mounting frame 12 has two stays 84 extending vertically, two stays 84 extending horizontally at the top, and two stays 84 extending horizontally at the bottom. Both ends of each stay 84 are screwed into two different brackets 80.

[0060] As shown in Figure 13, the sound-absorbing member 38 is positioned along it. The stay 84 is screwed into the bracket 80 after the sound-absorbing member 38 is positioned. In this case, the sound-absorbing member 38 is held in place by the stay 84, effectively preventing it from falling off, moving, or vibrating.

[0061] To assemble the mounting frame 12, first, the bracket 80 is attached to the side plate 36 with rivets or bolts. Next, the peripheral walls 32, 34, and 36 are combined to form the main body 30. After that, the sound-absorbing member 38 is placed inside the mounting frame 12 through the access opening 40, and then the stay 84 is screwed to the bracket 80 with bolts 88. In other words, in this example, the sound-absorbing member 38 can be placed without the stay 84, thus simplifying the placement work. Also, in this example, welding is not used in the assembly of the mounting frame 12, and the mounting frame 12 can be assembled with simple tools.

[0062] It should be noted that the configurations described so far are all examples, and other configurations may be modified as appropriate, as long as the configuration of claim 1 is met. For example, although the above description used an exhaust ventilation device 10 as an example, the technology disclosed herein may also be applied to an intake ventilation device. The configurations of the mounting frame 12 and the sound-absorbing member 38 may also be modified as appropriate. Furthermore, the ventilation device 10 may have a configuration that does not have an access opening 40, in other words, a configuration that requires the removal of the ventilation fan 14 in order to replace the sound-absorbing member 38. [Explanation of Symbols]

[0063] 10,10* Ventilation device, 12 Mounting frame, 14 Ventilation fan, 16 Flange, 18 Wind tunnel, 20 Support arm, 22 Motor unit, 30 Main body, 32 Top plate, 34 Bottom plate, 36 Side plate, 37 Bracket, 38 Sound-absorbing member, 39 Fixing hole, 40 Access opening, 42 Cover, 44 Door, 50 Internal frame unit, 52 Upper beam member, 54 Lower beam member, 56 Intermediate beam member, 58 Column member, 60 Side front wall, 62 Side rear wall, 64 Lower rear wall, 66 Upper front wall, 68 Upper rear wall, 69,74 Stud bolt, 70 Enclosure space, 76 Nut, 80 Bracket, 82 Screw hole, 84 Stay, 88 Bolt, 90 Sound-absorbing chamber, 100 Partition wall, 102 Ventilation hole.

Claims

1. A roughly cylindrical mounting frame that penetrates the partition wall separating the inside and outside of the building, A ventilation fan is attached to the indoor end of the aforementioned mounting frame, A sound-absorbing member made of a sound-absorbing material that absorbs sound, covering at least a portion of the inner circumferential surface of the mounting frame, A ventilation device characterized by being equipped with

2. A ventilation device according to claim 1, The mounting frame allows for the attachment and detachment of the sound-absorbing member from the mounting frame while the ventilation fan remains attached to the mounting frame. A ventilation device characterized by the following features.

3. A ventilation device according to claim 2, The ventilation device is characterized in that the mounting frame includes an access opening formed on its outer surface through which the sound-absorbing member can pass.

4. A ventilation device according to claim 3, The aforementioned mounting frame is A rectangular cylindrical body, An internal frame unit is arranged inside the main body and is composed of a combination of multiple beam members and column members, It has, The sound-absorbing member is held between the main body and the internal frame unit. A ventilation device characterized by the following features.

5. A ventilation device according to claim 3, The peripheral wall of the mounting frame has a projection that protrudes from its inner surface, The sound-absorbing member has a fixing hole through which the projection is inserted. A ventilation device characterized by the following features.

6. A ventilation device according to claim 2, The aforementioned mounting frame is A rectangular cylindrical body, An internal frame unit is arranged inside the main body and is composed of a combination of multiple beam members and column members, An access opening is provided on the indoor end face of the mounting frame, which is located outside the ventilation fan and communicates with the gap between the main body and the internal frame unit, It has, The sound-absorbing member is held between the main body and the internal frame unit, and is slidable in and out of the mounting frame through the access opening. A ventilation device characterized by the following features.

7. A ventilation device according to claim 2, The aforementioned mounting frame is A rectangular cylindrical body, An access opening formed on the outer circumferential surface of the main body, through which the sound-absorbing member can pass, Multiple brackets attached to the inner surface of the main body, A stay whose two ends are screwed and fastened to two different brackets, It has, The sound-absorbing member is held in place by being sandwiched between the inner surface of the main body and the stay. A ventilation device characterized by the following features.

Images