External wall with ventilator

Abstract

To provide an external wall with a ventilator as an external wall of a building, capable of appropriately draining water from a filter in a simple construction.SOLUTION: An external wall 10 with a ventilator includes a frame body 20 arranged in an opening space of the external wall of the building, and a ventilator unit 30 fixed to the indoor side end of the frame body in the state of partially entering into the frame body 20, the ventilator unit 30 having a ventilator body 32 for sucking or exhausting air through the inside of the frame body 20, and a filter unit 34 arranged on the outdoor side of the ventilator body 32. The filter unit 34 has a case 44 internally storing the filter 42, and the ventilator unit 30 is fixed to the frame body 20 in the state that a bottom face 44b in the case 44 faces a vent hole 26a provided in the indoor side end of the frame body and neighbors the internal wall face at the indoor side end of the frame body. In a lower end area at the outdoor side end of th frame body 20, a drain hole 20a is provided.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to an exterior wall of a building, and in particular to an exterior wall equipped with a ventilation fan. [Background technology]

[0002] An example of a configuration for attaching a ventilation fan to an exterior wall of a building is described in Patent Document 1. In the building described in Patent Document 1, a through hole is drilled in the exterior wall (exterior wall skeleton) and the ventilation fan is attached to the exterior wall by fitting the through hole into the through hole. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-144392 A Summary of the Invention [Problem to be solved by the invention]

[0004] A ventilator attached to an exterior wall may have a filter installed on the intake or exhaust side for the purpose of dust removal, etc. For example, the ventilator body and the filter may be combined into a unit and the unit may be attached to the exterior wall. In such a configuration, it is conceivable that rainwater, condensation water, etc. may be mixed into the air taken in or exhausted by the ventilator fan, and the water droplets may be captured by the filter, causing water to accumulate in the case housing the filter. Such water accumulated in the case (hereinafter, for convenience, also referred to as "water in the filter") needs to be properly drained.

[0005] On the other hand, if drainage equipment or the like is to be installed as an accessory to the ventilation fan, space must be secured for its installation, which may result in the structure around the ventilation fan on the exterior wall becoming larger and in increased equipment costs.

[0006] Therefore, the present invention has been made in consideration of the above-mentioned problems, and its object is to provide an exterior wall with a ventilation fan that can be used as the exterior wall of a building and that can properly drain water inside a filter with a simpler configuration. [Means for solving the problem]

[0007] The above problem is solved by the exterior wall with a ventilation fan of the present invention, which comprises a frame body arranged in an opening space formed in the exterior wall of a building, and a ventilation fan unit fixed to the indoor end of the frame body with a portion of it inserted into the frame body, the ventilation fan unit having a ventilation fan main body which draws in or exhausts air through the inside of the frame body, and a filter unit arranged on the outdoor side of the ventilation fan main body, the filter unit having a filter and a case which houses the filter, the ventilation fan unit is fixed to the frame body with the bottom surface inside the case facing an air vent provided at the indoor end of the frame body and adjacent to the inner wall surface of the indoor end of the frame body, and a drainage hole is provided in the lower end portion of the outdoor end of the frame body. In the exterior wall with a ventilation fan of the present invention configured as described above, the water in the filter flows down the bottom surface of the case into the frame and can be drained through the drainage holes provided in the frame. This makes it possible to drain the water in the filter with a simple configuration without installing any special equipment for drainage.

[0008] In the above-mentioned exterior wall with a ventilation fan, the bottom surface inside the case may be adjacent to a portion of the inner wall surface at the indoor end of the frame body where the lower end of the ventilation opening is located. According to the above configuration, water in the filter flows along the bottom surface of the case and into the case through the ventilation hole, so that the water in the filter can be properly drained.

[0009] Furthermore, in the above-mentioned exterior wall with a ventilation fan, it is more preferable that the bottom surface inside the case is located above the portion of the inner wall surface at the indoor end of the frame body where the lower end of the ventilation hole is located, and is adjacent to said portion. According to the above configuration, the water in the filter can more reliably flow into the case, so that the water in the filter can be more appropriately drained.

[0010] In the above-mentioned exterior wall with a ventilation fan, the frame may have a cylindrical portion and an end plate portion forming the indoor side end portion of the frame, and the end plate portion may be provided with a vent hole. In this case, it is preferable that the inner wall surface of the indoor side end portion of the frame is the inner wall surface of the end plate portion, and the bottom surface inside the case is adjacent to the inner wall surface of the end plate portion. According to the above-mentioned configuration, the water in the filter flows into the case through the vent hole along the bottom surface of the case, then moves along the inner wall surface of the end plate, and finally is discharged through the drain hole, which allows the water in the filter to be more appropriately drained.

[0011] Furthermore, in the above-mentioned exterior wall with a ventilation fan, it is preferable that the inner wall surface of the end plate portion includes a vertical plane, and the outdoor side end portion of the bottom surface inside the case is connected to the inner wall surface of the end plate portion in a state that intersects with the vertical plane of the inner wall surface of the end plate portion. With the above configuration, the water in the filter flows into the case through the ventilation hole along the bottom surface of the case, then falls along the inner wall surface of the end plate of the frame, and is finally discharged through the drain hole, which allows the water in the filter to be discharged more efficiently.

[0012] In the above-mentioned outer wall with a ventilation fan, the filter is inserted into the case through an insertion port provided in the case, and the case may be provided with a guide portion that engages with an outer edge of the filter when the filter is inserted to guide the insertion of the filter. In this case, it is preferable that, when the filter is housed in the case, a portion of the outer edge of the filter that is located at the side end of the filter engages with the guide portion, and at least a part of a portion that is located at the bottom end of the filter is exposed to the bottom surface inside the case. According to the above configuration, the water droplets captured by the filter can reach (fall down) the bottom surface of the case through the part of the lower end of the filter that is exposed to the bottom surface of the case. This allows the water droplets captured by the filter to flow into the case through the ventilation hole along the bottom surface of the case, and finally to be discharged from the drainage hole of the frame.

[0013] Furthermore, in the above-mentioned outer wall with a ventilation fan, the guide portion has a lower guide portion that engages with a portion of the outer edge of the filter that is located at the lower end of the filter, and the lower guide portion is provided with an exposure portion for exposing at least a portion of the portion of the outer edge of the filter that is located at the lower end of the filter. According to the above configuration, while the lower end of the filter is held by the lower guide portion, a part of the lower end of the filter can be exposed to the bottom surface of the case, whereby water droplets captured by the filter can reach the bottom surface of the case through the part of the lower end of the filter that is exposed to the bottom surface of the case, and can finally be properly discharged through the drainage hole of the frame body.

[0014] In the above-mentioned outer wall with a ventilation fan, the bottom surface inside the case and the inner wall surface at the lower end of the frame may each be an inclined surface that slopes downward toward the outdoor side. According to the above configuration, the bottom surface inside the case and the inner wall surface at the lower end of the frame are sloped, so that water inside the filter can be more appropriately drained.

[0015] In the above-mentioned exterior wall with a ventilation fan, it is preferable that the lower end portion of the outdoor end portion of the frame body in which the drainage hole is formed is located closer to the outdoors than the exterior wall. According to the above configuration, water in the filter can be drained to an outdoor space (a space outside the exterior wall) through the drainage holes in the frame.

[0016] In the above-mentioned exterior wall with a ventilation fan, the ventilation fan unit may have a shutter disposed on the outdoor side of the filter of the filter unit. In this case, it is preferable that the ventilation fan unit is fixed to the indoor end of the frame body with the shutter inserted into the frame body. According to the above configuration, the installation space of the ventilation fan unit can be made more compact by the amount that the shutter is recessed into the frame body. Also, by the shutter recessing into the frame body, the inside of the filter unit case and the inside of the frame body are continuous. This makes it possible to more reliably drain the water in the filter from the filter unit case into the frame body and drain it from the drain hole of the frame body. Effect of the Invention

[0017] According to the present invention, it is possible to properly drain water from within a filter using a simpler configuration in an exterior wall equipped with a ventilation fan installed in a building. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a perspective view of an exterior wall with a ventilation fan according to one embodiment of the present invention, as viewed from the outdoor side. [Diagram 2] FIG. 2 is a cross-sectional view of an exterior wall with a ventilation fan according to one embodiment of the present invention, showing cross-section II of FIG. 1. [Diagram 3] FIG. 3 is an enlarged view of the lower end of the filter unit and the lower end of the frame in FIG. 2. [Figure 4] 11A to 11C are diagrams showing a procedure for assembling each component part of the ventilation fan unit to the frame body. [Diagram 5] FIG. 2 is a diagram showing the configuration of a filter unit according to one embodiment of the present invention, with a portion of the case removed to show the internal structure of the case. [Figure 6] FIG. 4 is a diagram showing a structure of an exterior wall with a ventilation fan according to a first modified example of the present invention, and corresponds to FIG. [Figure 7] FIG. 4 is a diagram showing the structure of an outer wall with a ventilation fan according to a second modified example of the present invention, and corresponds to FIG. 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] <<Configuration example of an exterior wall with a ventilation fan according to one embodiment of the present invention>> Hereinafter, a configuration example of an exterior wall with a ventilation fan according to one embodiment of the present invention (hereinafter, this embodiment) will be described with reference to the attached drawings. In the drawings, each component is illustrated somewhat simplified or schematic to make the description easier to understand, and the size (dimensions) of each component and the intervals between components shown in the drawings are different from the actual ones. In addition, in this specification, when describing the position, orientation, condition, etc. of each component (building material) and each piece of equipment, unless otherwise specified, the description will refer to the position, orientation, condition, etc. at the time of use, specifically, when the component is installed in a building. In addition, in this specification, "orthogonal," "vertical," "parallel," and "horizontal" include the range of error generally accepted in the technical field of the present invention, and also include states where the directions are shifted within a range of less than a few degrees (e.g., 2 to 3°) from strictly orthogonal, vertical, parallel, and horizontal.

[0020] In this embodiment, a warehouse for storing goods is taken as an example of a building, and an exterior wall with a ventilator provided in the warehouse is described. However, the exterior wall with a ventilator of the present invention can also be used in buildings other than warehouses, such as factories, buildings, houses, stores, and facilities.

[0021] The exterior wall with a ventilator according to this embodiment (hereinafter referred to as the exterior wall with a ventilator 10) has the appearance shown in Fig. 1, and as shown in Fig. 2, includes an exterior wall 12, an extension member 18, a frame body 20, and a ventilator unit 30. Each of the components of the exterior wall with a ventilator 10 described above will be described below. In the following description, the direction penetrating the exterior wall 12, specifically the left-right direction in Fig. 2, will be referred to as the "thickness direction of the exterior wall 12." Additionally, the side of the exterior wall facing the outdoors in the thickness direction will be referred to as the "outdoor side," and the side facing the indoors will be referred to as the "indoor side."

[0022] (outer wall) The exterior wall 12 is provided in a warehouse as a building, and constitutes the main body of the exterior wall 10 with a ventilation fan. The exterior wall 12 according to this embodiment is configured by arranging a plurality of facing materials 14 in both the vertical and horizontal directions. As can be seen from FIG. 1, the facing materials 14 are plate materials having a substantially rectangular planar shape, and are commercially available exterior wall materials. Commercially available products that can be used as the facing materials 14 include known facing materials, such as Isoband (registered trademark).

[0023] In this embodiment, each of the multiple panel materials 14 that make up the exterior wall 12 of the warehouse has the same height. The width of the panel materials 14 may be the same or different among the multiple panel materials 14 that make up the exterior wall 12. Furthermore, among the multiple panel materials 14 that are arranged in the vertical direction to make up the exterior wall 12, two upper and lower panel materials 14 that are adjacent in the vertical direction are joined by a concave-convex fitting method. The structure for the concave-convex fitting is not particularly limited as long as it can suitably fit the two upper and lower panel materials 14.

[0024] 2, the exterior wall 12 is provided with an opening space 16 for mounting the ventilation fan unit 30. The opening space 16 is a space where some of the face materials 14 are removed from the multiple face materials 14 arranged in the vertical direction, that is, a space where no face material 14 is provided, and in this embodiment, it is a space formed by the absence of one face material 14. In other words, the height of the opening space 16 (the opening size in the vertical direction) corresponds to the height of one face material 14. The shape of the opening space 16 when viewed from the front (e.g., from the outdoor side), that is, the opening shape, is substantially rectangular.

[0025] (extension member) As shown in Figs. 2 and 4, the extension member 18 is provided on the indoor side of the facing material 14 and is a steel material extending in a horizontal direction (specifically, in a direction penetrating the paper in Fig. 2), and is constituted by, for example, a square pipe. A frame body 20 described later is fixed to this extension member 18, and more specifically, as shown in Fig. 2, it is screwed to the outdoor surface of the square pipe constituting the extension member 18. In this embodiment, the extension members 18 are disposed one each directly above and directly below the opening space 16, and the frame body 20 is fixed to each extension member 18. That is, the upper end of the frame body 20 is fixed to the extension member 18 located directly above the opening space 16, and the lower end of the frame body 20 is fixed to the extension member 18 located directly below the opening space 16. Each extension member 18 is fixed to and supported by a support member (not shown) that extends vertically, and may be positioned adjacent to the face material 14 in the thickness direction of the exterior wall 12, as shown in Figure 2.

[0026] In addition, a gap is usually formed between the extension member 18 and the frame body 20 in the vertical direction, but this gap is preferably filled with a filler material 40 such as caulking material for the purpose of ensuring aesthetic appearance, etc.

[0027] (Frame) The frame 20 is used to attach the ventilation fan unit 30 to the exterior wall 12, and more specifically, is a member that forms a base for attaching the ventilation fan unit 30, and is disposed within the opening space 16 as shown in Figures 2 and 4. In this embodiment, the frame 20 is made of a metal plate such as a steel plate or an aluminum plate, and has a rectangular cylindrical portion 22, a flat outdoor end plate portion 24, and an indoor end plate portion 26 as shown in Figures 2 and 4.

[0028] The cylindrical portion 22 is a portion formed by forming a metal plate into a rectangular cylindrical shape. More specifically, the cylindrical portion 22 has a body portion having a rectangular cylindrical shape and a side end portion in the axial direction. The side end portion is perpendicular to the body portion (i.e., the central axis of the cylindrical portion 22) and extends toward the inside of the cylindrical portion 22.

[0029] Moreover, among the inner wall surfaces (inner peripheral surfaces) of the cylindrical portion 22, the surface located at the lower end corresponds to the inner wall surface of the lower end portion of the frame body 20, and will be referred to as the cylindrical portion bottom surface 22a below. In this embodiment, the cylindrical portion bottom surface 22a has a slope for drainage as shown in Fig. 3. More specifically, the cylindrical portion bottom surface 22a is an inclined surface that slopes downward toward the outdoor side with respect to the horizontal direction. However, it is not limited to this, and the cylindrical portion bottom surface 22a may be a surface parallel to the horizontal direction (horizontal surface).

[0030] In this embodiment, the height (vertical length) of the tubular portion 22 is slightly smaller than the height of the opening space 16. With this configuration, the tubular portion 22 is disposed within the opening space 16 in the vertical direction, and more specifically, is disposed within the opening space 16 with a slight gap provided between the two upper and lower face materials 14 that sandwich the opening space 16. In order to prevent the infiltration of rainwater, etc., the gap between the cylindrical portion 22 and the face material 14 may be sealed, or a drainage member or the like may be installed.

[0031] The cylindrical portion 22 arranged in the opening space 16 is fixed to the above-mentioned extension member 18 with the central axis direction of the cylindrical portion 22 aligned with the thickness direction of the outer wall 12, as shown in Fig. 2. The method of fixing the cylindrical portion 22 to the extension member 18 is not particularly limited. For example, the cylindrical portion 22 may be provided with a flange-shaped piece 28 protruding from the outer peripheral surface of the cylindrical portion 22, and the flange-shaped piece 28 may be abutted against the outdoor surface of the square pipe forming the extension member 18 and screwed to fix the cylindrical portion 22 to the extension member 18. Note that the outer peripheral surface of the cylindrical portion 22 may be directly joined to the extension member 18 by welding or the like, without providing the flange-shaped piece 28.

[0032] As described above, the cylindrical portion 22 is fixed to the extension member 18, so that the frame body 20 is held in the open space 16. In this state, as shown in FIG. 2, the outdoor end of the frame body 20, more specifically, the outdoor end of the cylindrical portion 22 and the outdoor end plate portion 24, are located on the outdoor side of the exterior wall 12. On the other hand, as shown in FIG. 2, the indoor half of the frame body 20, more specifically, approximately half of the cylindrical portion 22 located on the indoor side, and the indoor end plate portion 26 are located on the indoor side of the two upper and lower panel members 14 sandwiching the open space 16. Also, as shown in FIG. 2, the indoor end surface of the indoor end plate portion 26 and the indoor end surface of the extension member 18 made of a square pipe are located on the same plane.

[0033] The outdoor end plate 24 is a rectangular plate adjacent to the outdoor end of the tubular portion 22 and joined to the outdoor end, and is a portion to which a weather cover 38 is fixed, as shown in Fig. 2. The outdoor end plate 24 is a flat plate portion having the same outer edge as the outer edge of the tubular portion 22, and is formed, for example, by folding back the outdoor side end portion of the tubular portion 22 inward. However, without being limited thereto, the outdoor end plate 24 is made of a separate body (a different plate material) from the tubular portion 22, and is joined to the outdoor side end portion of the tubular portion 22 with its outer edge coinciding with the outer edge of the tubular portion 22, specifically, by screwing or welding. The free end portion of the outdoor end plate portion 24 (the end portion opposite to the side adjacent to the tubular portion 22) may be folded back in an L shape for reinforcement purposes, as shown in Figs. Further, a rectangular hole that is continuous with the inner space of the tubular portion 22 is formed in the center of the outdoor end plate portion 24, and the inside of the weather cover 38 communicates with the inner space of the tubular portion 22 through this hole. Known devices can be used for the weather cover 38. The shape of the weather cover 38 is not particularly limited, and may be, for example, a fan shape in a side view as shown in Fig. 1, or a cylindrical or square tube shape.

[0034] The indoor side end plate portion 26 corresponds to an end plate portion, and is a rectangular plate adjacent to and joined to the indoor side end of the tubular portion 22, and is a portion to which the ventilation fan unit 30 is fixed, i.e., a base plate, as shown in Fig. 2. The indoor side end plate portion 26 is a flat plate portion having the same outer edge as the outer edge of the tubular portion 22, and is formed, for example, by folding back the indoor side end portion of the tubular portion 22 inward. However, without being limited thereto, the indoor side end plate portion 26 may be made of a separate body (a different plate material) from the tubular portion 22, and joined to the indoor side end portion of the tubular portion 22 with its outer edge coinciding with the outer edge of the tubular portion 22, and more specifically, may be joined by screws or welding. The free end portion of the indoor side end plate portion 26 (the end portion opposite to the side adjacent to the tubular portion 22) may be folded back in an L shape for reinforcement purposes, as shown in Figs.

[0035] The inner wall surface 26b of the indoor side end plate portion 26 forms the inner wall surface of the indoor side end portion of the frame body 20. The inner wall surface 26b includes a surface parallel to the vertical direction (vertical surface) as shown in Figures 2 and 3. Also, in the center portion of the indoor side end plate portion 26, as shown in Figure 3, an air vent 26a consisting of a square hole continuing into the inner space of the cylindrical portion 22 is formed. By providing this air vent 26a, the ventilation fan unit 30 is fixed to the indoor side end plate portion 26 with a part of it (specifically, a shutter 36 described later) inserted into the cylindrical portion 22 through the air vent 26a as shown in Figure 2. As can be seen from FIG. 3, a part of the inner wall surface 26b of the indoor side end plate portion 26 is located at the lower end of the ventilation opening 26a.

[0036] The frame body 20 according to this embodiment further has a drainage hole 20a provided at the lower end portion of the outdoor end portion of the frame body 20, as shown in Figures 2 and 3. This drainage hole 20a is a hole formed at the lower end portion of the corner (hereinafter, outdoor corner portion) formed by the outdoor end portion of the tubular portion 22 and the outdoor end plate portion 24 in the frame body 20, and has a size of about 10 mm. Also, as described above, when the frame body 20 is fixed to the exterior wall 12, the outdoor end portion of the frame body 20 is located closer to the outdoor side than the exterior wall 12, so that the lower end portion of the outdoor end portion where the drainage hole 20a is formed is naturally located closer to the outdoor side than the exterior wall 12 (see Figures 2 and 3).

[0037] The number of drainage holes 20a is not particularly limited, and may be one or more. The position of the drainage holes 20a may be the lower end portion of the outdoor end portion of the frame body 20. For example, the drainage holes 20a may be drilled in the outdoor end region of the cylindrical portion bottom surface 22a.

[0038] (Ventilator unit) The ventilation fan unit 30 is a ventilation device that is attached to the exterior wall 12 by being fixed to the indoor end of the frame body 12, and is a device that provides ventilation between the indoor space and the outdoor space through the opening space 16 of the exterior wall 12, more specifically, through the inside of the frame body 20 arranged within the opening space 16.

[0039] 2, in this embodiment, the ventilation fan body 32, the filter unit 34 arranged on the outdoor side of the ventilation fan body 32, and the shutter 36 are unitized to form a single ventilation fan unit 30. In detail, the ventilation fan body 32, the filter unit 34, and the shutter 36 each have a housing, and adjacent housings are bolted together to form a single unit. The housing of the filter unit 34 will be referred to as a case 44.

[0040] The ventilation fan body 32 operates to take in outdoor air indoors, and in this embodiment is made of a pressurized ventilation fan. That is, the ventilation fan body 32 according to this embodiment takes in outdoor air (external air) through the inside of the frame body 20 and exhausts it indoors. However, this is not limited to this, and the ventilation fan body 32 may exhaust indoor air to the outdoors through the inside of the frame body 20. 2 and 4, the ventilation fan body 32 is assembled to the filter unit 34, and more specifically, the housing of the ventilation fan body 32 is fixed to the indoor end of the case 44 of the filter unit 34 with bolts or the like. In this state, the outdoor end face of the housing of the ventilation fan body 32 (more specifically, a flange provided at the outdoor end of the housing) is joined to the indoor end face of the case 44 (see FIG. 2).

[0041] The filter unit 34 removes dust and the like from the air drawn into the ventilator main body 32, i.e., the air passing through the weather cover 38 and the frame body 20 toward the indoors, and is disposed on the outdoor side of the ventilator main body 32 as shown in Fig. 2. Note that, when the ventilator main body 32 exhausts indoor air to the outdoors, the filter unit 34 removes dust and the like from the air exhausted from the ventilator main body 32 (i.e., the indoor air). As shown in FIGS. 2, 4 and 5, the filter unit 34 has a dust removing filter 42 and a case 44 that houses the filter 42 therein.

[0042] As shown in Fig. 5, the filter 42 is made of a plate or panel body having a rectangular shape, and an aluminum frame is provided on each of the four sides forming the outer edge. A material known as a filter for a ventilator can be used for the filter material forming the main body of the filter 42. In this embodiment, the filter 42 is detachable from the case 44, and is inserted into the case 44 through an insertion opening 44a provided on the upper surface of the case 44, as shown in Fig. 5. The filter 42 housed in the case 44 can be removed from the case 44 through the insertion opening 44a.

[0043] The case 44 is a box-shaped container made of aluminum or steel plates, and has a size sufficient to accommodate the entire filter 42. In addition, the planar size of the case 44 (the size when viewed from the outdoor side) is sufficiently larger than the size of the ventilation opening 26a formed in the indoor side end plate portion 26 of the frame body 12. As shown in Fig. 5, the upper surface of the case 44 is provided with the above-mentioned insertion opening 44a. As shown in Figs. 2, 3 and 5, in this embodiment, the inner wall surface of the lower end of the case 44, i.e., the bottom surface 44b inside the case 44, has a slope for drainage. More specifically, the bottom surface 44b is an inclined surface that slopes downward toward the outdoor side with respect to the horizontal direction. However, the present invention is not limited to this, and the bottom surface 44b may be a surface parallel to the horizontal direction (a horizontal surface).

[0044] 4, rectangular ventilation holes 44c, 44d are formed on the outdoor surface and indoor surface of the case 44. Air that has passed through the weather cover 38 and the frame body 20 enters the filter unit 34 from the outdoor rectangular hole 44c, exits the filter unit 34 from the indoor rectangular hole 44d, and heads toward the ventilator fan main body 32. 4, the case 44 has a shutter fixing part 50 made of a plate having substantially the same outer shape as the rectangular hole 44c at a position slightly indoors of the rectangular hole 44c on the outdoor side. The shutter 36 is fixed to the outdoor surface of the shutter fixing part 50 (see FIG. 2), and the shutter fixing part 50 has a ventilation hole (not shown).

[0045] 5, side guide portions 46 and lower guide portions 48 are provided inside the case 44 as guide portions. The side guide portions 46 and lower guide portions 48 are each formed of a lip channel steel or the like, and engage with the outer edge of the filter 42 when the filter 42 is inserted, thereby guiding the insertion of the filter 42 into the case 44.

[0046] Specifically, as shown in FIG. 5, a pair of side guide parts 46 are provided with a gap in the width direction of the case 44 (a direction perpendicular to both the thickness direction and the vertical direction of the outer wall 12). Each side guide part 46 is fixed to a side end face (an inner wall face at an end in the width direction of the case 44) in the case 44 with the lip of the lip channel steel constituting the side guide part 46 facing the inside of the case 44, and extends long in the vertical direction. When the filter 42 is inserted into the case 44, each side guide part 46 engages with a part of the outer edge of the filter 42 that is located at the side end of the filter 42 (an end in the direction corresponding to the width direction of the case 44). As a result, the filter 42 moves downward while being guided by the side guide parts 46 in the case 44, that is, is inserted into the case 44. That is, the pair of side guide parts 46 function as guide rails when the filter 42 is inserted.

[0047] 5, the lower guide portion 48 is fixed to the bottom surface 44b inside the case 44, and in this embodiment, is configured by arranging a plurality of lip channel steel pieces in a row along the width direction of the case 44. Then, when the filter 42 is inserted to the innermost part inside the case 44, the lower guide portion 48 engages with a portion of the outer edge of the filter 42 that is located at the lower end of the filter 42. This places the filter 42 in the correct position inside the case 44. In other words, the lower guide portion 48 has the function of positioning the filter 42 inserted inside the case 44. It should be noted that, when the lower end of filter 42 is engaged by lower guide portion 48 , the portion of the outer edge of filter 42 that is located at the side end of filter 42 continues to engage with side guide portion 46 .

[0048] 5, in this embodiment, the multiple lip channel steel pieces constituting the lower guide portion 48 are spaced apart in the width direction of the case 44. Therefore, when the lower guide portion 48 is engaged with a portion of the outer edge of the filter 42 that is located at the lower end of the filter 42, at least a part of that portion, specifically, the portion that is not engaged with the lip channel steel, is exposed to the bottom surface 44b inside the case 44.

[0049] In other words, the lower guide portion 48 is provided with an exposed portion 48a for exposing at least a part of the outer edge of the filter 42, which is located at the lower end of the filter 42. This exposed portion 48a is formed by a gap between the lip channel steels (i.e., a portion where the lip channel steel is missing) in the lower guide portion 48, which is formed by a plurality of lip channel steel fragments arranged intermittently. However, this is not limited thereto, and for example, when the lower guide portion 48 is formed by a single lip channel steel that extends long in the width direction of the case 44, a hole may be formed in a web portion of the lip channel steel, and this hole may be used as the exposed portion 48a.

[0050] It should be noted that the lower guide portion 48 does not necessarily have to be provided inside the case 44. In that case, when the filter 42 is inserted all the way into the case 44, the entire portion of the outer edge of the filter 42 that is located at the lower end of the filter 42 is exposed to the bottom surface 44b inside the case 44.

[0051] The filter unit 34 configured as described above is fixed to the indoor side end plate 26 of the frame body 20 with bolts or the like. To explain in more detail, a flange is provided at the outdoor side end of the case 44 so as to surround the rectangular hole 44c. This flange is joined to the indoor side end face of the indoor side end plate 26 of the frame body 20, as shown in Figures 2 and 4, and is bolted to the peripheral portion of the ventilation opening 26a of the indoor side end plate 26. The means for fixing the filter unit 34 to the indoor side end plate portion 26 is not particularly limited, and for example, the case 44 of the filter unit 34 may be fixed to the indoor side end plate portion 26 by welding, adhesive, or the like.

[0052] Incidentally, a sealing material such as a butyl seal may be interposed at the joint between the case 44 (more specifically, the flange provided at the outdoor end of the case 44) and the indoor end plate portion 26 for waterproofing purposes.

[0053] The shutter 36 is an electric shutter that opens and closes the air passage (flow path) when outdoor air is taken into the ventilation fan main body 32 through the weather cover 38, and is positioned on the outdoor side of the filter 42 of the filter unit 34, as shown in Figure 2.

[0054] As shown in Fig. 3, the shutter 36 is attached to the outdoor portion of the filter unit 34. To explain in detail, the housing of the shutter 36 (specifically, a flange provided at the indoor end of the housing) is fixed to a shutter fixing part 50 provided in the case 44 of the filter unit 34 by a bolt or the like. In this state, the indoor end of the housing of the shutter 36 enters the case 44 through a square hole 44c provided at the outdoor end of the case 44, and the indoor end surface of the housing of the shutter 36 is joined to the outdoor end surface of the shutter fixing part 50 (see Fig. 2). On the other hand, most of the shutter 36 protrudes outward from the square hole 44c, that is, it is located on the outdoor side of the filter unit 34.

[0055] In this embodiment, the planar size (size when viewed from the outdoor side) of the shutter 36 including the housing is sufficiently smaller than the size of the vent hole 26a, which is a square hole formed in the indoor end plate portion 26. In addition, the thickness of the shutter 36 (length in the thickness direction of the outer wall 12) is smaller than the overall length of the cylindrical portion 22 of the frame body 20 (length in the thickness direction of the outer wall 12). Therefore, when the case 44 is bolted to the indoor end plate portion 26 of the frame body 20, the shutter 36 enters into the frame body 20 as shown in FIG. 2. Strictly speaking, the part of the shutter 36 located on the outdoor side of the case 44 enters into the cylindrical portion 22 of the frame body 20 through the vent hole 26a. That is, in this embodiment, the ventilation fan unit 30 is fixed to the indoor end plate portion 26 with a part of the shutter 36 housed in the frame body 20.

[0056] 2 and 4, when the case 44 of the filter unit 34 is fixed to the indoor side end plate 26, the vent hole 26a provided in the indoor side end plate 26 and the square hole 44c provided in the outdoor side end of the case 44 are continuous with each other. In other words, by fixing the ventilation fan unit 30 to the frame body 20, the inside of the frame body 20 and the inside of the case 44 are continuous with each other; in other words, the filter unit 34 is integrated with the frame body 20.

[0057] More specifically, when the ventilation fan unit 30 is fixed to the frame body 20 (hereinafter referred to as the unit fixed state), the bottom surface 44b inside the case 44 faces the ventilation opening 26a provided in the indoor side end plate portion 26, as shown in Fig. 3. Here, the bottom surface 44b facing the ventilation opening 26a means that the bottom surface 44b faces the ventilation opening 26a and there is nothing blocking the gap between the bottom surface 44b and the ventilation opening 26a.

[0058] 3, in the fixed unit state, the bottom surface 44b inside the case 44 is adjacent to the inner wall surface 26b of the indoor side end plate portion 26, specifically, adjacent to a portion of the inner wall surface 26b where the lower end of the vent hole 26a is located (hereinafter, referred to as the vent hole lower end portion). To explain in more detail, in the fixed unit state, the bottom surface 44b inside the case 44 is located above the vent hole lower end portion and adjacent to said portion. Here, the inner wall surface 26b of the indoor side end plate portion 26 refers to a surface (wall surface) of the indoor side end plate portion 26 that extends into the inside of the frame body 20, in other words, a surface that faces the internal space of the frame body 20. In addition, the configuration in which the bottom surface 44b inside the case 44 is adjacent to the inner wall surface 26b (particularly, the lower end portion of the ventilation hole) of the indoor side end panel portion 26 may include a configuration in which a sealing material such as a butyl seal is interposed between the bottom surface 44b and the inner wall surface 26b.

[0059] In this embodiment, in the unit fixed state, the outdoor end of the bottom surface 44b inside the case 44 is connected to the inner wall surface 26b of the indoor side end plate portion 26 in a state in which it intersects with the vertical plane of the inner wall surface 26b of the indoor side end plate portion 26. Here, the outdoor end of the bottom surface 44b inside the case 44 being connected to the inner wall surface 26b of the indoor side end plate portion 26 means that the bottom surface 44b and the inner wall surface 26b are integrated so that when water on the bottom surface 44b moves along the bottom surface 44b to the outdoor side, it reaches the outdoor end of the bottom surface 44b to the inner wall surface 26b and falls along the inner wall surface 26b, which is a vertical plane.

[0060] With the configuration described above, in the exterior wall 10 with a ventilation fan according to this embodiment, even if water droplets form inside the case 44 due to rainwater or condensation captured by the filter 42 in the filter unit 34, the water can be properly drained.

[0061] Specifically, water droplets generated inside the case 44 (water inside the filter) drop onto the bottom surface 44b of the case 44, and then flow along the bottom surface 44b toward the outdoors, as shown in Fig. 3. At this time, because the bottom surface 44b has a drainage slope, the water inside the filter can flow smoothly along the bottom surface 44b toward the outdoors.

[0062] In addition, the bottom surface 44b faces the vent hole 26a provided at the indoor side end of the frame body 20, and is adjacent to the inner wall surface of the indoor side end of the frame body 20. More specifically, the bottom surface 44b is located above a portion of the inner wall surface of the indoor side end of the frame body 20 that is adjacent to the lower end of the vent hole 26a, and is adjacent to said portion. Furthermore, in this embodiment, the outdoor side end of the bottom surface 44b is connected to the inner wall surface 26b of the indoor side end plate portion 26 of the frame body 20 in a state where it intersects with a vertical plane included in said inner wall surface 26b. With the above configuration, water that has flowed along the bottom surface 44b to the outdoors enters the frame 20 through the ventilation opening 26a, falls along the vertical plane of the inner wall surface 26b of the indoor side end plate portion 26, and then flows along the cylindrical portion bottom surface 22a to the outdoors, as shown in Fig. 3. At this time, since the cylindrical portion bottom surface 22a has a drainage slope, the water that has entered the frame 20 flows smoothly along the cylindrical portion bottom surface 22a to the outdoors.

[0063] 3, when the water on the bottom surface 22a of the cylindrical portion reaches the outdoor end of the bottom surface 22a of the cylindrical portion, it is drained to the outside of the frame body 20 through the drainage hole 20a provided in that portion. Here, the portion of the frame body 20 where the drainage hole 20a is provided is located closer to the outdoor side than the outer wall 12. Therefore, the water on the bottom surface 22a of the cylindrical portion (i.e., the water in the filter) can be drained to the outdoor space through the drainage hole 20a.

[0064] The exterior wall 10 with a ventilator of this embodiment configured as described above is meaningful compared to the conventional structure. To be more specific, among the conventional exterior walls with a ventilator, there are some in which the shutter 36 is fixed to the indoor end of the frame body 20, and the filter unit 34 and the ventilator main body 32 are installed on the indoor side of the shutter 36. In such a configuration, the filter unit 34 is inevitably separated from the frame body 20. Therefore, in order to flow the water in the filter into the frame body 20, a separate device such as a pipe connecting the case 44 of the filter unit 34 and the frame body 20 is separately installed. In this case, a separate installation space for the device is required, which increases the size of the structure of the exterior wall with a ventilator and increases the installation costs.

[0065] In contrast, in this embodiment, the ventilation fan unit 30 is fixed to the frame body 20 with the shutter 36 housed in the frame body 20, so that the ventilation fan-equipped exterior wall 10 can have a more compact structure. In addition, since the shutter 36 is housed in the frame body 20, the frame body 20 and the case 44 of the filter unit 34 can be connected and integrated. As a result, the water in the filter can be made to flow into the frame body 20 and discharged from the drainage hole 20a of the frame body 20 without requiring any special equipment or device for drainage. In other words, in this embodiment, the water in the filter can be appropriately drained to the outdoor space with a relatively simple configuration.

[0066] In this embodiment, a lower guide portion 48 that engages with a portion of the outer edge of the filter 42 that is located at the lower end of the filter 42 is provided inside the case 44 of the filter unit 34, and the lower guide portion 48 is provided with the above-mentioned exposed portion 48a. By providing this exposed portion 48a, a part of the portion of the outer edge of the filter 42 that is located at the lower end of the filter 42 is exposed to the bottom surface 44b of the case 44 without engaging with the lower guide portion 48. As a result, water droplets such as rainwater and condensation water captured by the filter 42 reach the bottom surface 44b of the case 44 from the exposed portion of the lower end of the filter 42, and are then drained into the outdoor space through the frame 20 as described above.

[0067] <<Other embodiments>> Although one embodiment of the exterior wall with a ventilation fan of the present invention has been described above, the above embodiment is merely an example for making the present invention easier to understand, and does not limit the present invention. In other words, the present invention can be modified and improved without departing from the spirit of the present invention. In addition, the present invention naturally includes its equivalents.

[0068] Regarding another embodiment of the present invention, for example, the ventilation fan unit 30 may be fixed to the frame body 20 with a part of the ventilation fan unit 30, specifically, the shutter 36 located on the most outdoor side of the ventilation fan unit 30, being positioned on the indoor side of the frame body 20. However, from the viewpoint of making the exterior wall 10 with a ventilation fan more compact, it is more advantageous to fix the ventilation fan unit 30 to the frame body 20 with the shutter 36 housed within the frame body 20 as in the above embodiment.

[0069] In the above embodiment, the frame body 20 is fixed to the extension member 18 extending in the horizontal direction, but this is not limited thereto, and the frame body 20 may be fixed to a member extending in the vertical direction (so-called vertical furring strips). The frame body 20 may also be fixed to both the extension member 18 extending in the horizontal direction and a member extending in the vertical direction.

[0070] Also, in the above embodiment, an example has been described in which one ventilation fan unit 30 is attached to the exterior wall 12. However, this is not limited to the above, and when multiple ventilation fan units 30 are attached to the exterior wall 12, for example, in a multi-story building, a ventilation fan unit 30 may be attached to the exterior wall 12 for each floor. In this case, the exterior wall 12 is provided with the same number of opening spaces 16 as the number of ventilation fan units 30, and a ventilation fan unit 30 is attached to each opening space 16.

[0071] In the above embodiment, the outdoor end of the bottom surface 44b of the case 44 is adjacent to the inner wall surface of the indoor end of the frame body 20, more specifically, is continuous (connected) with the inner wall surface. However, this is not limited to this, and as shown in Fig. 6, the outdoor end of the bottom surface 44b of the case 44 may be adjacent to the inner wall surface of the indoor end of the frame body 20 in a state where it enters the frame body 20 from the ventilation opening 26a. In this case, for example, the inner wall surface of the indoor side end of the tubular portion 22 corresponds to the inner wall surface of the indoor end of the frame body 20.

[0072] In the above embodiment, the inner wall surface of the roof side end of the frame body 20 is the inner wall surface 26b of the indoor side end plate portion 26 including a vertical surface, and the outdoor side end of the bottom surface 44b of the case 44 is connected to the inner wall surface 26b in a state of intersecting the vertical surface of the inner wall surface 26b. However, this is not limited to the above, and as shown in Fig. 7, the frame body 20 may not have the indoor side end plate portion 26, and the indoor side end may be an open end. In this case, the indoor side end of the inner peripheral surface of the cylindrical portion 22 corresponds to the inner wall surface of the indoor side end of the frame body 20, and as shown in Fig. 7, the bottom surface 44b of the case 44 may be continuous with the indoor side end of the inner peripheral surface of the cylindrical portion 22, and both surfaces may be on the same plane. [Explanation of symbols]

[0073] 10 Exterior wall with ventilation fan 12 Exterior Wall 14 Surface material 16 Open space 18 Extension member 20 Frame 20a Drain hole 22 Cylindrical part 22a Bottom surface of cylindrical part 24 Outdoor end plate 26 Indoor side end plate part (end plate part) 26a Ventilation hole 26b Inner wall 28 Flange piece 30 Ventilation fan unit 32 Ventilator body 34 Filter unit 36 Shutter 38 Weather cover 40 Filler 42 Filters 44 cases 44a Insertion port 44b Bottom 44c,44d square hole 46 Side guide part (guide part) 48 Lower guide part (guide part) 48a Exposed part 50 Shutter fixing part

Claims

1. A frame body disposed in an opening space formed in an exterior wall of a building; a ventilation fan unit fixed to an indoor end of the frame body with a portion of the ventilation fan unit inserted into the frame body, The ventilation fan unit includes a ventilation fan main body that takes in or exhausts air through the inside of the frame body, and a filter unit that is disposed on the outdoor side of the ventilation fan main body, The filter unit includes a filter and a case for accommodating the filter therein. The ventilation fan unit is fixed to the frame body in a state where a bottom surface of the case faces a ventilation hole provided at an indoor end of the frame body and is adjacent to an inner wall surface of the indoor end of the frame body, An exterior wall with a ventilation fan, the lower end portion of the outdoor end of the frame body being provided with a drainage hole.

2. 2 . The exterior wall with a ventilation fan according to claim 1 , wherein a bottom surface inside the case is adjacent to a portion of an inner wall surface at an indoor end of the frame body, where a lower end of the ventilation hole is located.

3. The exterior wall with a ventilation fan as described in claim 2, wherein the bottom surface of the case is located above a portion of the inner wall surface at the indoor end of the frame body where the lower end of the ventilation hole is located, and is adjacent to said portion.

4. The frame body has a cylindrical portion and an end plate portion that forms an indoor side end portion of the frame body, The end plate portion is provided with the ventilation hole, The inner wall surface of the indoor end portion of the frame body is the inner wall surface of the end plate portion, The outer wall with a ventilation fan according to claim 1 , wherein a bottom surface inside the case is adjacent to an inner wall surface of the end plate portion.

5. The inner wall surface of the end plate portion includes a vertical surface, 5. The exterior wall with a ventilation fan according to claim 4, wherein an outdoor end of a bottom surface inside the case is connected to the inner wall surface of the end plate portion in a state where the outdoor end end intersects with a vertical plane of the inner wall surface of the end plate portion.

6. The filter is inserted into the case through an insertion port provided in the case, the case is provided with a guide portion that engages with an outer edge portion of the filter when the filter is inserted to guide the insertion of the filter, 2. An outer wall with a ventilation fan as described in claim 1, wherein, when the filter is housed in the case, a portion of the outer edge of the filter located at the side end of the filter engages with the guide portion, and at least a portion of a portion located at the lower end of the filter is exposed to a bottom surface inside the case.

7. the guide portion includes a lower guide portion that engages with a portion of an outer edge of the filter that is located at a lower end of the filter, The outer wall with a ventilation fan according to claim 6 , wherein the lower guide portion is provided with an exposure portion for exposing at least a part of a portion of an outer edge portion of the filter that is located at a lower end of the filter.

8. 2. The exterior wall with a ventilation fan according to claim 1, wherein a bottom surface inside the case and an inner wall surface at a lower end of the frame are each inclined surfaces that are inclined downward toward the outdoor side.

9. The exterior wall with a ventilation fan according to claim 1 , wherein a lower end portion of the outdoor end portion of the frame body in which the drainage hole is formed is located closer to the outdoor side than the exterior wall.

10. The ventilation fan unit has a shutter disposed on the outdoor side relative to the filter of the filter unit, The exterior wall with a ventilation fan according to claim 1 , wherein the ventilation fan unit is fixed to an indoor end of the frame body with the shutter inserted inside the frame body.

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