Ventilation structure of building

Abstract

To provide a ventilation structure of a building for facilitating maintenance of a ventilation port.SOLUTION: A ventilation structure for a building comprises: a ventilation port provided in an outer wall of a building; piping provided inside the building; and a chamber that covers the periphery of the ventilation port from inside the building to form an enclosed space around the ventilation port, and to which the piping is connected so that the enclosed space communicates with the inside of the piping. A bottom surface on the inside side of the chamber has an inclined surface that is inclined so that a side proximal to the ventilation port is positioned lower in a vertical direction than a side distal to the ventilation port in an arrangement direction in which the ventilation port and the chamber are aligned.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a ventilation structure of a building.

Background Art

[0002] In rooms of a building such as a kitchen, a bathroom unit, and a toilet, since water vapor and odors are filled, it is necessary to ventilate the air. To ventilate the air in a room of a building, there has been proposed a ventilation structure of a building including a ventilation fan provided in a room to be ventilated, a ventilation opening having a ventilation gallery attached to an outer wall of the building, and a duct directly connected to the ventilation fan and the ventilation gallery. (For example, see Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the ventilation structure of a building described in Patent Document 1, since the space between the ventilation gallery and the duct is narrow, it is difficult to maintain the ventilation gallery. In particular, when dust accumulates in the space between the ventilation gallery and the duct, it may be necessary to remove the ventilation gallery, and the work becomes complicated.

[0005] In view of such circumstances, the present invention aims to provide a ventilation structure of a building that facilitates maintenance of the ventilation opening.

Means for Solving the Problems

[0006] The ventilation structure of the building of the present invention includes a ventilation opening provided on the outer wall of the building, a pipe provided inside the building, and a chamber that covers the periphery of the ventilation opening from the inside of the building to form an enclosed space around the ventilation opening, and the pipe is connected so that the inside of the enclosed space communicates with the inside of the pipe.

[0007] In the ventilation structure of the building of the present invention, the bottom surface on the inner side of the chamber has an inclined surface that is inclined so that the side closer to the ventilation opening is located on the lower side in the vertical direction than the side farther from the ventilation opening in the arrangement direction in which the ventilation opening and the chamber are arranged.

[0008] In the ventilation structure of the building of the present invention, the chamber has a chamber main body portion connected to the ventilation opening and defining the enclosed space, a maintenance opening formed in the chamber main body portion, and an opening / closing lid portion configured to be able to open and close the opening.

[0009] In the ventilation structure of the building of the present invention, the chamber main body portion has an opposing wall portion that opposes the ventilation opening in the arrangement direction in which the ventilation opening and the chamber are arranged. The opposing wall portion has an upper opposing wall portion located on the upper side in the vertical direction and a lower opposing wall portion that is continuous with the upper opposing wall portion and is located on the lower side in the vertical direction than the upper opposing wall portion. The pipe is connected to the upper opposing wall portion, and the opening is provided in the lower opposing wall portion.

[0010] In the ventilation structure of the building of the present invention, a string portion is provided, one end of which is connected to the opening / closing lid portion and the other end of which is connected to the chamber main body portion.

[0011] In the ventilation structure of the building of the present invention, the chamber has a chamber main body portion connected to the ventilation opening and defining the surrounding space, a maintenance opening formed in the chamber main body portion, and an opening / closing lid portion configured to be able to open and close the opening. The opening / closing lid portion has a lid-side inclined plate portion that, in a state where the opening is closed, faces the ventilation opening in the arrangement direction and is inclined such that a side closer to the ventilation opening in the arrangement direction is located on the lower side in the vertical direction. The opposing surface of the lid-side inclined plate portion facing the ventilation opening in the arrangement direction constitutes a part of the inclined surface, which is a characteristic feature.

[0012] In the ventilation structure of the building of the present invention, the chamber main body portion has a main-body-side inclined plate portion fixed to the bottom wall portion of the chamber main body portion on the lower side in the vertical direction in the surrounding space. The opposing surface of the main-body-side inclined plate portion facing the ventilation opening in the arrangement direction constitutes a part of the inclined surface. In a state where the opening / closing lid portion closes the opening, the upper-side region of the main-body-side inclined plate portion and the lower-side region of the lid-side inclined plate portion overlap, thereby forming the inclined surface, which is a characteristic feature.

[0013] In the ventilation structure of the building of the present invention, when a direction orthogonal to both the arrangement direction and the vertical direction is defined as the width direction of the chamber, the main-body-side inclined plate portion has two end regions located at both ends in the width direction and an intermediate region between the two end regions. The end regions protrude above the intermediate region in the inclination direction of the inclined surface, which is a characteristic feature.

[0014] In the ventilation structure of the building of the present invention, at least one of the two end regions protrudes inside the opening when viewed from the arrangement direction, which is a characteristic feature.

[0015] In the ventilation structure of the building of the present invention, when each of the two end regions defines a protruding region as a region that protrudes inside the opening when viewed from the arrangement direction, and a gap between the two protruding regions as an open region, the width of the open region along the width direction of the chamber is equal to or greater than the total dimension of the widths of the two protruding regions along the width direction of the chamber.

[0016] In the ventilation structure of the building of the present invention, the intermediate region is characterized by not protruding inside the opening when viewed from the arrangement direction.

Effects of the Invention

[0017] According to the ventilation structure of the building of the present invention, it is possible to achieve an excellent effect of facilitating the maintenance of the ventilation opening.

Brief Description of the Drawings

[0018]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0019] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0020] <Overall Configuration> As shown in FIG. 1, the ventilation structure of the building 100 of the present invention includes a ventilation opening 1, a pipe 2, and a chamber 3.

[0021] <Ventilation Opening> As shown in FIG. 1, the ventilation opening 1 is provided in the outer wall 110 of the building 100 and has a ventilation gallery 10. The ventilation gallery 10 is attached to a region penetrating the outer wall 110 of the building 100. Note that the ventilation gallery 10 is a ventilation opening configured to perform ventilation and air exchange while blocking the line of sight from the outside. The ventilation gallery 10 is, for example, one example in which a plurality of slender thin plates are arranged in a row in the vertical direction in a posture inclined with respect to the horizontal direction, but is not limited thereto, and may have other structures.

[0022] <Pipe> As shown in FIG. 1, the pipe 2 is provided inside the building 100. One end of the pipe 2 is connected to a ventilation facility (ventilation fan, ventilation hood, etc.) provided in a room (for example, kitchen, bathroom, toilet, etc.) inside the building 100, and the other end is connected to the chamber 3.

[0023] <Chamber> As shown in FIG. 1, the chamber 3 covers the periphery of the ventilation opening 1 from inside the building 100 to form an enclosed space 4 around the ventilation opening 1. The chamber 3 has a connection opening 3A for attaching the pipe 2. When the pipe 2 is connected to the chamber 3 at the connection opening 3A, the enclosed space 4 communicates with the inside of the pipe 2. Thereby, ventilation of the air inside the building 100 can be performed.

[0024] The chamber 3 is composed of a box-shaped member with a predetermined surface open, and has a chamber main body portion 30, an opening 30A, an opening / closing lid portion 31, a detaching mechanism 32, a string portion 33, and an inclined plate portion 34. Here, for convenience of explanation, as shown in FIG. 1, the direction parallel to the arrangement direction in which the ventilation opening 1 and the chamber 3 are arranged is defined as the depth direction D of the chamber 3, the direction parallel to the vertical direction is defined as the vertical direction H of the chamber 3, and the direction parallel to the direction orthogonal to both the vertical direction (vertical direction) and the arrangement direction is defined as the width direction W of the chamber 3.

[0025] <Chamber main body portion, opening portion> The chamber main body portion 30 is connected to the ventilation opening 1 and defines the enclosed space 4. The opening 30A is formed in the chamber main body portion 30. The opening 30A is mainly provided for maintenance inside the chamber 3. For example, it is used when removing dust and moisture accumulated inside the chamber 3. Therefore, the opening 30A has a size that allows an operator to reach in and out.

[0026] And as shown in FIGS. 1 to 3, the chamber main body portion 30 has an upper wall portion 35, a bottom wall portion 36, width direction side wall portions 37, 38, a depth direction side wall portion 39 in which the opening 30A is formed, and a flange 40. The upper wall portion 35, the bottom wall portion 36, the width direction side wall portions 37, 38, the depth direction side wall portion 39, and the flange 40 are each formed in a plate shape.

[0027] As shown in FIG. 1, the inner side surface 360 on the side facing the surrounding space 4 of the bottom wall portion 36 of the chamber main body portion 30 has an inclined surface 361 that is inclined such that the side closer to the ventilation port 1 in the depth direction (arrangement direction) D of the chamber 3 is located on the lower side in the vertical direction H of the chamber 3 than the distal side. The inclined surface 361 preferably extends to the ventilation port 1. Even if water droplets accumulate on the inner side surface 360 of the bottom wall portion 36, the water droplets can be guided to the ventilation port 1 by the inclined surface 361. Therefore, it is possible to prevent moisture from accumulating inside the chamber 3.

[0028] Each of the width direction side wall portions 37 and 38 faces each other in the width direction W of the chamber 3, is continuous with the upper wall portion 35 at the upper end in the vertical direction H of the chamber 3, is continuous with the bottom wall portion 36 at the lower end in the vertical direction H of the chamber 3, and is continuous with the depth direction side wall portion 39 at one end in the depth direction D of the chamber 3.

[0029] The depth direction side wall portion 39 faces the ventilation port 1 in the depth direction (arrangement direction) D of the chamber 3. In that sense, the depth direction side wall portion 39 may be read as the opposing wall portion 39. And the depth direction side wall portion 39 is continuous with the upper wall portion 35 at the upper end in the vertical direction H of the chamber 3, is continuous with the bottom wall portion 36 at the lower end in the vertical direction H of the chamber 3, is continuous with the width direction side wall portion 37 at one end in the width direction W of the chamber 3, and is continuous with the width direction side wall portion 38 at the other end in the width direction W of the chamber 3. In the present embodiment, the depth direction side wall portion 39 has an upper side side wall portion 39A located on the upper side in the vertical direction H of the chamber 3 and a lower side side wall portion 39B that is continuous with the upper side side wall portion 39A and is located on the lower side in the vertical direction H of the chamber 3 than the upper side side wall portion 39A. Note that the upper side side wall portion 39A and the lower side side wall portion 39B may be read as the upper side opposing wall portion 39A and the lower side opposing wall portion 39B, respectively.

[0030] At least one connection opening 3A for connecting the pipe 2 is provided in the upper side wall portion 39A. Further, the upper side wall portion 39A has a posture inclined with respect to the lower side wall portion 39B. And the upper side wall portion 39A and the lower side wall portion 39B are provided such that the size in the vertical direction H of the chamber 3 becomes 1:1, but it is not limited thereto, and other ratios may be used.

[0031] An opening 30A is formed in the lower side wall portion 39B. The opening 30A is provided so as to include the lowermost end or the vicinity thereof in the vertical direction H of the lower side wall portion 39B. And the opening 30A is located at a position facing the ventilation opening 1 in the depth direction (arrangement direction) D of the chamber 3.

[0032] The chamber main body portion 30 is open to the outside on the side facing the depth direction side wall portion 39 in the depth direction (arrangement direction) D of the chamber 3. The flange 40 has an enlarged diameter starting from the outer edge of the open side of the chamber main body portion 30. And the flange 40 has a plurality of holes 40A through which fixing members 41 such as screws pass. The chamber main body portion 30 is attached to the inner wall surface 120 of the building 100 around the ventilation opening 1 by bringing the flange 40 into contact with the inner wall surface 120 of the building 100 around the ventilation opening 1 and using fixing members 41 such as screws. Thereby, the surrounding of the ventilation opening 1 is covered and an enclosed space 4 is formed around the ventilation opening 1.

[0033] <Opening / closing lid portion, detaching mechanism, string portion> As shown in FIGS. 2(A) and (B), the opening / closing lid portion 31 is configured to be able to open and close the opening 30A. And the opening / closing lid portion 31 is constituted by a plate-like body having a size capable of closing the opening 30A. Further, as shown in FIG. 1, a sealing member 310 is interposed between the opening / closing lid portion 31 and the region around the opening 30A of the lower side wall portion 39B. By the sealing member 310, the gap between the opening / closing lid portion 31 and the region around the opening 30A of the lower side wall portion 39B can be surely eliminated.

[0034] The sealing member 310 is, for example, made of ethylene propylene rubber (EPDM), but is not limited to this, and may be composed of other materials.

[0035] As shown in FIG. 1, the detaching and attaching mechanism 32 is for detaching and attaching the opening / closing lid portion 31 to / from the chamber main body portion 30. The detaching and attaching mechanism 32 is assumed to be composed of, for example, a screw and a screw groove provided in the chamber main body portion 30, but is not limited to this, and all other mechanisms capable of detaching and attaching the opening / closing lid portion 31 are also included in the scope of the present invention.

[0036] Also, a string portion 33 for preventing the dropped opening / closing lid portion 31 from falling is provided on the opening / closing lid portion 31 (see FIG. 2(B)). One end of the string portion 33 is connected to the outer surface 31A of the opening / closing lid portion 31, and the other end is connected to the chamber main body portion 30. When the opening 30A is closed by the opening / closing lid portion 31, when the surface facing the surrounding space 4 is defined as the inner surface 31B, the surface on the opposite side of the inner surface 31B becomes the outer surface 31A of the opening / closing lid portion 31. It is preferable that the other end of the string portion 33 is connected to a position below the opening 30A or to the bottom wall portion 36 of the chamber main body portion 30.

[0037] <Inclined plate portion> As shown in FIG. 4, the inclined plate portion 34 is provided inside the chamber 3 (surrounding space 4). While facing the ventilation port 1 in the depth direction D of the chamber 3, it is inclined such that the proximal side in the depth direction D of the chamber 3 is located on the lower side in the vertical direction H of the chamber 3 rather than the distal side with respect to the ventilation port 1. And the main body side inclined plate portion 341 is also inclined with respect to the inner side surface 360 (inclined surface 361) of the bottom wall portion 36. Therefore, when looking at the inside of the chamber 3 from the upper side in the vertical direction, there is a region where the bottom wall portion 36 and the inclined plate portion 34 overlap, and a space is formed between the inclined plate portion 34 and the bottom wall portion 36 in this region.

[0038] When looking at the inside of the chamber 3 from above in the vertical direction, a partial region of the inner side surface 360 of the bottom wall portion 36 is hidden by the inclined plate portion 34, and instead, a partial region thereof appears to be formed by the inclined surface 347 of the inclined plate portion 34. In this sense, it may be regarded as constituting an inclined surface that forms the inner side bottom surface of the chamber 3 with the remaining region of the inner side surface 360 (inclined surface 361) of the bottom wall portion 36 and the inclined surface 347 of the inclined plate portion 34. Note that the inclined surface 347 is the opposing surface of the inclined plate portion 34 that opposes the ventilation port 1 in the depth direction D of the chamber 3.

[0039] Due to being configured as described above, even if water droplets adhere to the side wall portion 39 in the depth direction, the water droplets can be guided to the inclined surface 361 of the bottom wall portion 36 by the inclined surface 347 of the inclined plate portion 34. Therefore, it is possible to prevent moisture from accumulating inside the chamber 3. Note that in this embodiment, the inclined plate portion 34 merges with the inclined surface 361, but it is not limited thereto, and those that do not merge with the inclined surface 361 are also included in the scope of the present invention.

[0040] In this embodiment, the inclined plate portion 34 has a plate-shaped main body side inclined plate portion 341 and a plate-shaped lid side inclined plate portion 342. The main body side inclined plate portion 341 is fixed to the inner side surface 360 (inclined surface 361) facing the surrounding space 4 side of the bottom wall portion 36 of the chamber 3 in the surrounding space 4, and constitutes the lower region of the inclined plate portion 34.

[0041] The main body side inclined plate portion 341 is inclined such that it faces the ventilation port 1 in the depth direction D of the chamber 3, and the proximal side in the depth direction D of the chamber 3 with respect to the ventilation port 1 is located on the lower side in the vertical direction H of the chamber 3. And the main body side inclined plate portion 341 is also inclined with respect to the inner side surface 360 (inclined surface 361) of the bottom wall portion 36. Also, when looking at the inside of the chamber 3 from the upper side in the vertical direction, there is a region where the bottom wall portion 36 and the main body side inclined plate portion 341 overlap, and a space is formed between the bottom wall portion 36 and the main body side inclined plate portion 341 in this region. As a result, the main body side inclined plate portion 341 in the present embodiment takes a posture of merging with the inclined surface 361 of the bottom wall portion 36 or branching from the inclined surface 361 of the bottom wall portion 36, and is connected to the chamber main body portion 30 by the bottom wall portion 36. Also, the opposing surface 347A of the main body side inclined plate portion 341 that faces the ventilation port 1 in the depth direction D of the chamber 3 forms a lower side region that is a partial region of the inclined surface 347 of the inclined plate portion 34, and may be read as the lower side inclined surface 347A.

[0042] The lid side inclined plate portion 342 is connected to the opening / closing lid portion 31, constitutes the upper side region of the inclined plate portion 34 when the opening / closing lid portion 31 closes the opening 30A, and forms the inclined plate portion 34 together with the main body side inclined plate portion 341. And the lid side inclined plate portion 342 is inclined such that it faces the ventilation port 1 in the depth direction D of the chamber 3 and the proximal side in the depth direction D of the chamber 3 with respect to the ventilation port 1 is located on the lower side in the vertical direction H of the chamber 3 when the opening / closing lid portion 31 closes the opening 30A. Also, the lid side inclined plate portion 342 is also inclined with respect to the inner side surface 360 (inclined surface 361) of the bottom wall portion 36. Also, when looking at the inside of the chamber 3 from the upper side in the vertical direction, there is a region where the bottom wall portion 36 and the lid side inclined plate portion 342 overlap, and a space is formed between the bottom wall portion 36 and the lid side inclined plate portion 342 in this region. Also, the opposing surface 347B of the lid side inclined plate portion 342 that faces the ventilation port 1 in the depth direction D of the chamber 3 forms an upper side region that is a partial region of the inclined surface 347 of the inclined plate portion 34, and may be read as the upper side inclined surface 347B.

[0043] When the opening / closing lid portion 31 closes the opening 30A, the lid-side inclined plate portion 342 is located at a position farther from the ventilation port 1 (closer to the opening / closing lid portion 31) than the main body-side inclined plate portion 341 in the depth direction D of the chamber 3. The main body-side inclined plate portion 341 and the lid-side inclined plate portion 342 have an overlapping region 343 where they overlap each other. In the overlapping region 343, an upper region, which is a partial region of the main body-side inclined plate portion 341 including the upper end of the main body-side inclined plate portion 341, and a lower region, which is a partial region of the lid-side inclined plate portion 342 including the lower end of the lid-side inclined plate portion 342, overlap. And the upper region of the main body-side inclined plate portion 341 is located above the lower region of the lid-side inclined plate portion 342 in the vertical direction and closer to the ventilation port 1 in the depth direction D of the chamber 3. When the opening / closing lid portion 31 closes the opening 30A, the upper region of the main body-side inclined plate portion 341 and the lower region of the lid-side inclined plate portion 342 overlap in the overlapping region 343, forming the inclined plate portion 34 and the inclined surface 347.

[0044] Note that in the overlapping region 343, a sealing member 344 is interposed between the main body-side inclined plate portion 341 and the lid-side inclined plate portion 342. The sealing member 344 can surely eliminate the gap between the main body-side inclined plate portion 341 and the lid-side inclined plate portion 342. The sealing member 344 is, for example, made of ethylene propylene rubber (EPDM), but is not limited thereto and may be composed of other materials.

[0045] Further, as shown in FIG. 5, when comparing the inclination angle θ1 of the main body side inclined plate portion 341 (see the solid line in FIG. 5) with respect to the inner side surface 360 (inclined surface 361) of the bottom wall portion 36 before the opening / closing lid portion 31 closes the opening 30A, and the inclination angle θ2 of the main body side inclined plate portion 341 (see the dotted line in FIG. 5) with respect to the inner side surface 360 (inclined surface 361) of the bottom wall portion 36 after the opening / closing lid portion 31 closes the opening 30A, θ2 > θ1. That is, before the opening / closing lid portion 31 closes the opening 30A, the main body side inclined plate portion 341 is in a state of being tilted toward the inner side surface 360 (inclined surface 361) of the bottom wall portion 36 as compared with after the opening / closing lid portion 31 closes the opening 30A. In the process of closing the opening 30A with the opening / closing lid portion 31, the lid side inclined plate portion 342 passes through the opening 30A and enters the surrounding space 4, contacts the sealing member 344, and presses the main body side inclined plate portion 341 toward the ventilation port 1 via the sealing member 344, then the main body side inclined plate portion 341 rises. At this time, due to the action of the reaction force caused by the elastic force of the main body side inclined plate portion 341, the adhesion force among the main body side inclined plate portion 341, the sealing member 344, and the lid side inclined plate portion 342 becomes strong in the overlapping region 343.

[0046] Here, with reference to the width direction W of the chamber 3, the main body side inclined plate portion 341 is divided into two end regions 341A located at both ends respectively, and an intermediate region 341B located between the two end regions 341A. In the present embodiment, as shown in FIG. 6(A), the main body side inclined plate portion 341 is configured such that the end regions 341A protrude above the intermediate region 341B in the inclination direction of the main body side inclined plate portion 341. Note that the intermediate region 341B includes the center of the main body side inclined plate portion 341.

[0047] As shown in Fig. 6(B), in the present embodiment, when the main body inclined plate portion 341 is disposed inside the chamber main body portion 30, as viewed from the depth direction D of the chamber 3, the end region 341A protrudes inside the opening 30A (the region surrounded by the opening 30A; the same shall apply hereinafter.) (see the protruding region 345 in Fig. 6(B)), and the intermediate region 341B is configured not to protrude inside the opening 30A as viewed from the depth direction D of the chamber 3. The reason for the intermediate region 341B not to protrude inside the opening 30A is to widen the working space for the operator when the opening / closing lid portion 31 is opened to open the opening 30A. On the other hand, the end region 341A is made to protrude inside the opening 30A in order to increase the area of contact between the lid-side inclined plate portion 342 and the sealing member 344 as much as possible when the opening 30A is closed by the opening / closing lid portion 31, making it easier to press the main body inclined plate portion 341. Note that at least one of the two end regions 341A may protrude inside the opening 30A.

[0048] Here, the regions where the respective two end regions 341A protrude inside the opening 30A as viewed from the depth direction D of the chamber 3 are defined as protruding regions 345, and the gap between the two end regions 341A is defined as an open region 348 (see the dotted line region in Fig. 6(B)). From the viewpoint of providing a wider working space for the operator, when comparing the total dimension of the widths of the two protruding regions 345 along the width direction W of the chamber 3 with the dimension of the width of the open region 348 along the width direction W of the chamber 3, it is preferable that the latter is equal to or greater than the former. That is, as shown in Fig. 6(B), for example, when the opening width of the opening 30A is P and the width of the protruding region 345 is Q, it is preferable that (P - 2Q) ≥ 2Q. Note that (P - 2Q) indicates the width of the open region 348 along the width direction W of the chamber 3, and the width of the intermediate region 341B along the width direction W of the chamber 3 is the same. More preferably, P / 6 ≥ Q may be satisfied, or P / 10 ≥ Q may be satisfied. In any case, the width of the open region 348 is determined based on the ease of maintenance for the operator. Specifically, based on the opening width of the opening 30A, the widths of the end region 341A and the intermediate region 341B are determined respectively.

[0049] Also, when closing the opening 30A of the chamber main body 30 with the opening / closing lid 31, the lid-side inclined plate portion 342 is inserted into the chamber main body 30 through the opening 30A. At this time, as shown in FIG. 6(C), through a sealing member 344 (not shown), both end regions 342A and the lower-side region 342B of the lid-side inclined plate portion 342 overlap with the protruding regions 345 of the two end regions 341A of the main body-side inclined plate portion 341 and the upper-side region 341C of the intermediate region 341B, respectively, to form a U-shaped overlapping region 343.

[0050] Also, as shown in FIG. 6(D), there may be a region where the intermediate region 341B protrudes inside the opening 30A (see the protruding region 346 in FIG. 6(D)). However, from the viewpoint of providing a wide working space for the operator, it is preferable that the protruding region 346 be as small as possible. For example, when the opening height of the opening 30A is T and the height of the protruding region 346 is S, it is preferable that S ≤ T / 5, more preferably S ≤ T / 8, and even more preferably S ≤ T / 10. That is, the height of the intermediate region 341B is determined based on the opening height of the opening 30A.

[0051] In addition, the above description has been made for the case where the inclined plate portion 34 is composed of the main body-side inclined plate portion 341 and the lid-side inclined plate portion 342, but the present invention is not limited thereto, and the case where the inclined plate portion 34 is composed of a single inclined plate is also included in the scope of the present invention. In this case, from the viewpoint of ensuring a working space when the opening / closing lid 31 is removed to open the opening 30A, it is preferable that the inclined plate portion 34 be fixed to the opening / closing lid 31. Also, in the ventilation structure of the building 100, the case where the inclined plate portion 34 is omitted is also included in the scope of the present invention. Also, in the ventilation structure of the building 100, the case where the main body-side inclined plate portion 341 or the lid-side inclined plate portion 342 is omitted is also included in the scope of the present invention.

[0052] Also, a part of the depth-direction side wall portion 39 and the bottom wall portion 36 of the chamber main body 30 may be configured to have an inclined state similar to that of the inclined plate portion 34. In this case, the inclined surface 347 and the inclined surface 361 can be formed without providing the inclined plate portion 34.

[0053] Furthermore, the ventilation structure of the building 100 of the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

Explanation of Signs

[0054] 1 Ventilation opening 2 Pipe 3 Chamber 3A Connection opening 4 Enclosed space 10 Ventilation gallery 30 Chamber main body 30A Opening 31 Opening / closing lid 32 Detaching mechanism 33 String part 34 Inclined plate part 35 Upper wall part 36 Bottom wall part 37, 38 Side walls in width direction 39 Side wall in depth direction 39A Upper side wall part 39B Lower side wall part 40 Flange 100 Building 110 Outer wall 341 Main body side inclined plate part 341A Both end regions 341B Intermediate region 342 Lid side inclined plate part 343 Overlapping region 345 Overlapping region 346 Overlapping region 347 Inclined surface 360 Bottom surface 361 Inclined surface

Claims

1. A ventilation opening provided on the outer wall of a building, a pipe provided inside the building, a chamber that covers the periphery of the ventilation opening from inside the building to form an enclosed space around the ventilation opening, and the pipe is connected so that the enclosed space communicates with the inside of the pipe, characterized by comprising a ventilation structure for a building.

2. The bottom surface on the inner side of the chamber has an inclined surface that inclines such that in the arrangement direction in which the ventilation opening and the chamber are arranged, the side closer to the ventilation opening is located on the lower side in the vertical direction than the side farther from the ventilation opening. The ventilation structure for a building according to Claim 1.

3. The chamber has a chamber main body portion connected to the ventilation opening and defining the enclosed space, a maintenance opening formed in the chamber main body portion, and an opening / closing lid portion configured to be able to open and close the opening, characterized by having the ventilation structure for a building according to Claim 1.

4. The chamber main body portion has an opposing wall portion that opposes the ventilation opening in the arrangement direction in which the ventilation opening and the chamber are arranged, The opposing wall portion has an upper-side opposing wall portion located on the upper side in the vertical direction, and a lower-side opposing wall portion that is continuous with the upper-side opposing wall portion and is located on the lower side in the vertical direction than the upper-side opposing wall portion, The pipe is connected to the upper-side opposing wall portion, The opening is provided in the lower-side opposing wall portion, characterized by being the ventilation structure for a building according to Claim 3.

5. characterized by comprising a string portion having one end connected to the opening / closing lid portion and the other end connected to the chamber main body portion, The ventilation structure for a building according to Claim 3.

6. The chamber has a chamber main body portion connected to the ventilation opening and defining the enclosed space, a maintenance opening formed in the chamber main body portion, and an opening / closing lid portion configured to be able to open and close the opening, The opening / closing lid portion has a lid-side inclined plate portion that inclines such that in the state of closing the opening, it opposes the ventilation opening in the arrangement direction, and the side closer to the ventilation opening in the arrangement direction is located on the lower side in the vertical direction than the side farther from the ventilation opening, The opposing surface of the lid-side inclined plate portion that opposes the ventilation opening in the arrangement direction constitutes a part of the inclined surface, characterized by being the ventilation structure for a building according to Claim 2. The chamber main body portion has a main body side inclined plate portion fixed to the bottom wall portion of the chamber main body portion on the lower side in the vertical direction in the surrounding space. The opposing surface of the main body side inclined plate portion facing the ventilation opening in the arrangement direction constitutes a part of the inclined surface. In a state where the opening / closing lid portion closes the opening, an upper region of the main body side inclined plate portion and a lower region of the lid side inclined plate portion overlap, thereby forming the inclined surface. The ventilation structure of a building according to claim 6.

8. When defining a direction orthogonal to both the arrangement direction and the vertical direction as the width direction of the chamber, The main body side inclined plate portion has two end regions respectively located at both ends in the width direction, and an intermediate region between the two end regions, and the end regions protrude above the intermediate region in the inclination direction of the inclined surface. The ventilation structure of a building according to claim 7.

9. At least one of the two end regions protrudes inside the opening when viewed from the arrangement direction. The ventilation structure of a building according to claim 8.

10. When defining the regions where each of the two end regions protrudes inside the opening when viewed from the arrangement direction as protruding regions, and defining the gap between the two protruding regions as an open region, the width of the open region along the width direction of the chamber is equal to or greater than the total dimension of the widths of the two protruding regions along the width direction of the chamber. The ventilation structure of a building according to claim 9.

11. The intermediate region does not protrude inside the opening when viewed from the arrangement direction. The ventilation structure of a building according to claim 9.

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