Ventilation fans and mounting parts

Abstract

To obtain a ventilator which can surely attach a ventilator main body to a duct connecting member by suppressing an inclination of the duct connecting member.SOLUTION: A ventilator 100 comprises a ventilator main body 1 having a box-shaped housing and a fan 11 arranged in the housing, a duct connecting member 2 attached to a side face of the housing, and connected with a duct, and a frame-shaped attachment member 3 in which the ventilator main body 1 is inserted into an internal peripheral side. The duct connecting member 2 has a vertical wall fixed to the attachment member 3 at a lower end part, extending upward from the attachment member 3, and attached to the side face of the housing, and a connection part extending from the vertical wall in a direction in which the connection part separates from the ventilator main body 1, and connected with the duct. A first cut-and-raised part extending upward and opposing the vertical wall is formed at an internal peripheral edge of the attachment member 3. A holding part abutting on the vertical wall and pressing the vertical wall toward the side face of the housing is arranged at the first cut-and-raised part.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a ventilation fan and a mounting member to be installed on a ceiling of a building. [Background technology]

[0002] Conventionally, ventilation fans are known that are installed on a ceiling by fitting into an installation hole formed in the ceiling, draw in indoor air, and exhaust it to the outside or another indoor space through a duct. For example, Patent Document 1 discloses a configuration including a ventilation device main body, a duct connection frame, and an auxiliary frame. The ventilation device main body has an intake port for drawing in indoor air and an exhaust port formed on its side for exhausting the intake air. The duct connection frame has a vertical wall attached to the side of the ventilation device main body where the exhaust port is formed, and a cylindrical connection part to which the duct is connected. The auxiliary frame is a frame-shaped mounting member that is positioned along the opening edge of the installation hole in the ceiling and fixed to the ceiling, and the ventilation device main body is inserted into its inner periphery. A blower that generates an exhaust flow from the intake port toward the duct connection frame is installed inside the ventilation device main body.

[0003] To install the ventilation fan of Patent Document 1 on the ceiling of a building, an auxiliary frame is placed and fixed along the periphery of the installation hole in the ceiling, and a duct connection frame is attached to the auxiliary frame. The duct connection frame is attached to the auxiliary frame by fixing the lower end of the vertical wall to the auxiliary frame, which is a mounting member. Then, the ventilation device main body is inserted into the inner periphery of the auxiliary frame, connecting the side of the ventilation device main body to the vertical wall of the duct connection frame, and fixing the ventilation device main body to the auxiliary frame. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2001-4187 Summary of the Invention [Problem to be solved by the invention]

[0005] In a configuration in which a duct is connected to a connection portion of a duct connection frame, such as the ventilation fan disclosed in Patent Document 1, an overlap between the connection portion and the duct is required, so the length of the connection portion must be increased by the amount of the overlap. Furthermore, for example, a shutter that opens and closes due to wind pressure may be installed inside the connection portion. Therefore, when the lower end of the vertical wall of the duct connection frame is attached to the auxiliary frame, the weight of the connection portion and the shutter may cause the duct connection frame to tilt significantly toward the duct connection from its lower end. If the duct connection frame is tilted too much, the vertical wall may be positioned off-center, making it difficult to connect the side of the ventilation device main body inserted inside the auxiliary frame to the duct connection frame. Insufficient connection between the ventilation device main body and the duct connection frame may result in insufficient ventilation airflow due to wind leakage or moisture leaking to the ceiling.

[0006] The present disclosure has been made in view of the above, and has an object to provide a ventilation fan that can suppress tilting of a duct connection member attached to a mounting member. [Means for solving the problem]

[0007] To solve the above-mentioned problems and achieve the object, the present disclosure provides a ventilation fan that is installed on a ceiling by fitting into an installation hole formed in the ceiling. The ventilation fan includes a box-shaped housing with an intake port for drawing in room air and an exhaust port formed on its side for discharging the intake air, a ventilation fan main body having a fan disposed inside the housing, a duct connection member attached to the side of the housing so as to communicate with the exhaust port and to which a duct is connected, and a frame-shaped mounting member disposed along the opening edge of the installation hole and into whose inner periphery the ventilation fan main body is inserted. The duct connection member has a vertical wall that is fixed at its lower end to the mounting member, extends upward from the mounting member, and is attached to the side of the housing, and a connection portion that extends from the vertical wall in a direction away from the ventilation fan main body and is connected to the duct. The inner periphery of the mounting member is provided with a first raised portion that extends upward and faces the vertical wall. The first raised portion is provided with a retaining portion that abuts against the vertical wall and presses the vertical wall against the side of the housing. [Effects of the Invention]

[0008] The ventilation fan according to the present disclosure has the advantage of being able to suppress tilting of the duct connection member attached to the mounting member. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an exploded perspective view of a ventilation fan according to an embodiment; [Figure 2] FIG. 1 is a perspective view of a ventilation fan according to an embodiment, showing a state in which a ventilation fan body, a duct connecting member, and a decorative grille are removed; [Figure 3] FIG. 1 is a longitudinal cross-sectional view showing a ventilation fan according to an embodiment. [Figure 4] FIG. 1 is a perspective view showing a ventilation fan body according to an embodiment; [Figure 5] FIG. 1 is a bottom view of the ventilation fan according to the embodiment, seen from the indoor side, with the decorative grill removed. [Figure 6] 1 is a perspective view of a ventilation fan according to an embodiment, seen from above the ceiling; [Figure 7] FIG. 7 is a schematic explanatory view showing part VII of FIG. 3, illustrating how the duct connecting member is attached to the ventilation fan body. [Figure 8] FIG. 10 is a perspective view showing a state in which a connecting member is attached to an attachment member according to an embodiment. [Figure 9] FIG. 1 is a perspective view showing a connecting member according to an embodiment; [Figure 10] FIG. 10 is an enlarged view of a main part of the ventilation fan according to the embodiment, illustrating how a holding portion is provided on the first cut-and-raised portion. [Figure 11] FIG. 10 is an enlarged view of a main part of the ventilation fan according to the embodiment, showing a state in which a holding portion is provided on a first cut-and-raised portion. [Figure 12] FIG. 10 is an explanatory diagram illustrating the operation of the holding portion of the ventilation fan according to the embodiment; DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, a ventilation fan and a mounting member according to an embodiment of the present disclosure will be described in detail with reference to the drawings.

[0011] Embodiment FIG. 1 is an exploded perspective view of a ventilation fan according to an embodiment. FIG. 2 is a perspective view of the ventilation fan according to an embodiment, showing the ventilation fan main body, duct connection member, and decorative grill removed. In FIGS. 1 and 2, the upper side of ceiling 200 in the drawing indicates attic space 202, and the lower side of ceiling 200 in the drawing indicates room 201. Also, in FIGS. 1 and 2, a portion of ceiling 200 is cut away to show the state. FIG. 3 is a vertical cross-sectional view of the ventilation fan according to the embodiment. Attachment member 3 and connecting member 4 are omitted from FIG. 3. FIG. 4 is a perspective view of the ventilation fan main body according to the embodiment. FIG. 5 is a bottom view of the ventilation fan according to the embodiment, as seen from the indoor side, with the decorative grill removed. FIG. 6 is a perspective view of the ventilation fan according to the embodiment, as seen from the under-the-ceiling side. Attachment member 3 and connecting member 4 are omitted from FIG. 6. FIG. 7 is an explanatory diagram showing part VII of FIG. 3, schematically illustrating how the duct connection member is attached to the ventilation fan main body.

[0012] As shown in FIGS. 1 to 3, ventilation fan 100 according to this embodiment is installed on ceiling 200 by fitting into installation hole 200a formed in ceiling 200, and is a device that draws in air from room 201 and exhausts it to the outside or another indoor space through duct 300. When duct 300 is connected to the outside of the room, ventilation fan 100 functions as an exhaust ventilation fan that exhausts air from room 201 to the outside. In this case, duct 300 extends to the outside and connects to a hood (not shown) or the like attached to the exterior wall of the building, forming a ventilation airway that ventilates the air inside the building. When duct 300 is connected to another indoor space, ventilation fan 100 functions as a circulation ventilation fan that circulates air within room 201.

[0013] An installation hole 200a formed in the ceiling 200 connects the room 201 to the attic 202. The installation hole 200a is shown as an example to be rectangular, but other shapes are also possible. The attic 202 is a space formed between the ceiling 200 and an upper floor slab (not shown). The ventilation fan 100 is installed from the installation hole 200a to the attic 202. As shown in Figures 1 and 2, a plurality of anchor bolts 203 are suspended from the upper floor slab in the attic 202.

[0014] As shown in Figures 1 to 3, the ventilation fan 100 includes a ventilation fan main body 1, a duct connection member 2, an attachment member 3, a connecting member 4, and a decorative grill 5. As shown in Figures 1 to 4, the ventilation fan main body 1 has a box-shaped housing 10 and a fan 11 arranged inside the housing 10.

[0015] As shown in FIGS. 1 to 4, housing 10 has a rectangular parallelepiped shape and has top surface 10a and four side surfaces 10b. Housing 10 has an opening on the bottom surface opposite top surface 10a as air intake port 10c. Mounting flange portion 10d is provided on the periphery of air intake port 10c, extending in a direction away from the center of air intake port 10c. Mounting flange portion 10d is formed with fixing holes 10h into which fixing members 8 such as screws for attaching mounting member 3 are inserted.

[0016] The housing 10 is installed with the air intake 10c facing the room 201. A protrusion 10f protruding upward is provided on the periphery of the top surface 10a. The protrusion 10f is provided for attaching the duct connection member 2 to the side surface 10b of the housing 10. Note that the protrusion 10f is not limited to being formed along the periphery of the top surface 10a, and may be provided only on a part of the top surface 10a.

[0017] As shown in FIGS. 1 and 4, one of the four side surfaces 10b has an exhaust port 10e formed therein for discharging the intake air. Two elastic temporary fixing springs 10g are provided at intervals on each of the two side surfaces 10b adjacent to the side surface 10b with the exhaust port 10e formed thereon. As an example, the temporary fixing springs 10g are configured by welded nuts to leaf springs and are fixed to the housing 10 from the inside with screws. The temporary fixing springs 10g are provided so that the leaf springs extend obliquely downward toward the outer periphery of the mounting member 3. As shown in FIG. 1, the temporary fixing springs 10g are provided to temporarily fix the ventilation fan main body 1 and the mounting member 3 when the ventilation fan main body 1 is inserted into the inner periphery of the mounting member 3 for installation.

[0018] The fan 11 is a device installed inside the housing 10 and generates an air flow that flows into the housing 10 through the intake port 10c and flows out through the exhaust port 10e. The fan 11 has a fan casing 12, a motor 13, and blades 14.

[0019] As shown in FIGS. 3 and 5, the fan casing 12 is formed with an inlet 12a that draws in air that has flowed into the housing 10 through the inlet 10c, and an outlet 12b that discharges air from the interior of the fan casing 12 toward the outlet 10e. The fan casing 12 is installed with the inlet 12a facing the inlet 10c and the outlet 12b facing the outlet 10e. The fan casing 12 is fixed to the top surface 10a of the housing 10 with fixing members such as screws (not shown). As shown in FIG. 3, a spring fixing member 12c is attached by a screw or a lock to the surface of the fan casing 12 where the inlet 12a is formed. The spring fixing member 12c is provided for attaching the decorative grille 5 to the fan casing 12.

[0020] As shown in FIGS. 3 and 5, a power connection device 15 connected to an external power source (not shown) is provided inside the housing 10. The power connection device 15 is disposed in a storage space surrounded by the outer surface of the fan casing 12 and the inner surface of the housing 10. As shown in FIG. 3, a portion of the power connection device 15 facing the air intake 10c is covered by a terminal cover 16 attached to the fan casing 12. The terminal cover 16 is provided to prevent dust, moisture, and the like from entering the power connection device 15. The terminal cover 16 is rotatably attached to a support portion 12d provided on the fan casing 12 via a rotation shaft 16a. The terminal cover 16 can be opened and closed by rotating it about the rotation shaft 16a. The terminal cover 16 is also surrounded by a protective wall 12e provided on the fan casing 12. The terminal cover 16 is also provided with a finger hook 16b on which an operator can place their finger when opening or closing the terminal cover 16.

[0021] As shown in Fig. 5, when the terminal cover 16 is open, access to the power connection device 15 is possible, and therefore an external power supply wire (not shown) that connects an external power supply (not shown) to the power connection device 15 can be connected to the power connection device 15 from inside the room 201. On the other hand, as shown in Fig. 3, when the terminal cover 16 is closed, the terminal cover 16 and the protective wall 12e can improve the airtightness of the space that houses the power connection device 15.

[0022] The motor 13 rotates the blades 14. As shown in Fig. 3, the motor 13 is fixed to the top surface 10a of the housing 10. The blades 14 are attached to a shaft 13a of the motor 13 and are disposed inside the fan casing 12.

[0023] The motor 13 and the power supply connection device 15 are electrically connected by a motor electric wire 17. As shown in FIG. 6, the motor electric wire 17 is routed along the top surface 10a of the housing 10 and is drawn into the inside of the housing 10 through a bushing 18 provided on the top surface 10a. Power supplied from an external power source (not shown) is transmitted to the motor 13 via the power supply connection device 15 and the motor electric wire 17. Electrical energy is converted into rotational motion of the shaft 13a of the motor 13, and the rotational motion of the motor 13 is transmitted to the blades 14, causing the blades 14 to rotate. The rotation of the blades 14 generates an airflow in the air passage formed by the fan casing 12, from the intake port 10c toward the exhaust port 10e.

[0024] The duct connection member 2 is a member that is detachably attached to the side surface 10b of the housing 10 where the exhaust port 10e is formed, and to which the duct 300 is connected. As shown in Figures 2, 3 and 6, the duct connection member 2 has a flat vertical wall 20 that is attached to the side surface 10b of the housing 10 where the exhaust port 10e is formed, and a cylindrical connection part 21 that protrudes from the wall surface of the vertical wall 20 and to which the duct 300 is connected.

[0025] The vertical wall 20 is disposed with its wall surface facing the side surface 10b of the housing 10, on which the exhaust port 10e is formed. An opening is formed in the vertical wall 20, connecting the exhaust port 10e to a cylindrical connecting portion 21. As shown in FIGS. 3 and 7 , the vertical wall 20 has a fitting portion 20a on one wall surface facing the side surface 10b of the housing 10, which is fitted with a protrusion 10f on the top surface 10a of the housing 10, and a connecting portion 21 on the other wall surface. For example, the fitting portion 20a protrudes from the wall surface of the vertical wall 20 toward the protrusion 10f and has a recessed shape so that the protrusion 10f can be fitted therein. Furthermore, as shown in FIGS. 3 and 6 , a flange portion 20b is formed on the lower edge of the vertical wall 20, protruding toward the connecting portion 21. A plurality of fixing holes 20c, into which fixing members 9 such as screws are inserted, are formed in the flange portion 20b along the lower edge of the vertical wall 20.

[0026] The connection portion 21 connects the exhaust port 10e of the housing 10 to the duct 300. The connection portion 21 has a shape in which a rectangular tube-shaped portion and a cylindrical portion are connected from the intake side to the exhaust side. The rectangular tube-shaped portion is connected to the vertical wall 20. The cylindrical portion protrudes from the rectangular tube-shaped portion toward the exhaust side and is connected to the duct 300. The cylindrical portion has an outer diameter that gradually decreases from the intake side to the exhaust side. In this embodiment, the cylindrical portion has a large-diameter portion and a small-diameter portion, and is composed of two cylinders with different outer diameters. This allows multiple ducts 300 with different inner diameters to be selectively connected to the connection portion 21. Furthermore, because there is a step between the large-diameter portion and the small-diameter portion of the cylindrical portion, the area to wrap tape to secure the duct 300 to the connection portion 21 is clear, making the wrapping operation easier. The shape of the connection portion 21 is not limited to the above configuration and may be composed of only a cylindrical portion or may have other shapes. The cylindrical portion may be made up of three or more cylinders with different outer diameters, or may be made up of a cylinder with a single outer diameter.

[0027] 3, a shutter 6 that opens and closes due to wind pressure is installed inside the connection part 21. The shutter 6 opens due to wind pressure when the ventilation fan 100 is operating, and closes the inside of the connection part 21 due to the weight of the shutter 6 when the ventilation fan 100 is stopped. By installing the shutter 6 inside the connection part 21, for example, in the case where the duct 300 is connected to the outside of the room, it is possible to prevent outside air from entering the room 201 through the duct 300 when the ventilation fan 100 is stopped.

[0028] Next, the mounting member 3 and connecting member 4 of this embodiment will be described in detail with reference to Figs. 1 and 2 as well as Figs. 8 to 12. Fig. 8 is a perspective view showing a state in which a connecting member is attached to a mounting member in this embodiment. Fig. 9 is a perspective view showing a connecting member in this embodiment. Fig. 10 is an enlarged view of a main part of the ventilation fan according to this embodiment, showing how a holding part is provided on the first cut-and-raised portion. Fig. 11 is an enlarged view of a main part of the ventilation fan according to this embodiment, showing a state in which a holding part is provided on the first cut-and-raised portion. Fig. 12 is an explanatory view of the ventilation fan according to this embodiment, schematically showing the function of the holding part. Fig. 12(A) shows a state before the holding part is provided, and Fig. 12(B) shows a state in which the holding part is provided.

[0029] 1 and 2, the mounting member 3 is a frame-shaped member that is disposed along the opening edge of the installation hole 200a, attached to anchor bolts 203 via connecting members 4, and into whose inner periphery the ventilation fan main body 1 is inserted. As shown in FIG. 8, the shape of the mounting member 3 is, for example, a rectangular frame that matches the shape of the installation hole 200a in the ceiling 200. The mounting member 3 has a flat portion 30 that forms the rectangular frame shape, a flange portion 31 formed by bending downward along the outer periphery of the flat portion 30, and a first cut-and-raised portion 32, a second cut-and-raised portion 33, and a third cut-and-raised portion 34 formed by cutting and raising part of the inner periphery of the flat portion 30 upward.

[0030] 1 and 8, a plurality of fixing holes 30a, into which fixing members 8 are inserted, are formed at intervals in the flat portion 30 along the circumferential direction of the mounting member 3. With the ventilation fan main body 1 inserted into the inner circumferential side of the mounting member 3, the flat portion 30 is placed on the upper surface of the mounting flange portion 10d and fixed to the mounting flange portion 10d with the fixing members 8. In this way, the ventilation fan main body 1 is attached to the mounting member 3.

[0031] As shown in Figures 1 and 2, a duct connection member 2 is attached to one of the flat portions 30 on four sides. As shown in Figure 11, fixing holes 30b are formed in the flat portion 30, into which fixing members 9 such as screws are inserted. As shown in Figures 11 and 12, the duct connection member 2 is attached to the mounting member 3 by overlapping the upper surface of the flange portion 20b with the lower surface of the flat portion 30, and inserting the fixing members 9 into the fixing holes 30b and 20c of the flange portion 20b to join the flat portion 30 and the flange portion 20b.

[0032] 2 and 8, fixing brackets 35 are provided on the flat portions 30 of the four sides to which the duct connection member 2 is not attached. The fixing brackets 35 are provided to fix the mounting member 3 to light-weight reinforcing bars 400 provided in the attic 202. The fixing brackets 35 are formed with elongated holes 35a for passing fixing members (not shown) such as bolts. The mounting member 3 is fixed to the light-weight reinforcing bars 400 by attaching the fixing brackets 35 to the light-weight reinforcing bars 400 with fixing members (not shown). This makes it possible to suppress vibrations during operation of the ventilation fan 100.

[0033] When the mounting member 3 is positioned along the opening edge of the installation hole 200a and the ventilation fan main body 1 is inserted into the frame of the mounting member 3, the outer surface of the flange portion 31 abuts against the inner surface of the installation hole 200a and the inner surface abuts against the outer surface of the mounting flange portion 10d.

[0034] 8, the first cut-and-raised portions 32 are formed on flat portions 30 of the inner peripheral edges of the four sides of the mounting member 3, to which the duct connection member 2 is attached. The second cut-and-raised portions 33 are formed on flat portions 30 that form two sides of the inner peripheral edges of the four sides of the mounting member adjacent to the side on which the first cut-and-raised portions 32 are provided. The third cut-and-raised portions 34 are formed on flat portions 30 that form the side of the inner peripheral edges of the four sides of the mounting member 3 that faces the side on which the first cut-and-raised portions 32 are provided.

[0035] As shown in FIGS. 8 and 10 to 12 , the first cut-and-raised portion 32 is provided to face the wall surface of the vertical wall 20 of the duct connection member 2. The first cut-and-raised portion 32 is formed with screw holes 32a into which retaining portions 7 are inserted, which abut against the vertical wall 20 and press the vertical wall 20. As an example, the screw holes 32a are formed at multiple positions spaced apart along the circumferential direction of the mounting member 3. As an example, the retaining portions 7 are screw members. The vertical wall 20 is pressed against the side surface 10b of the housing 10 by the tips of the retaining portions 7 inserted into the screw holes 32a abutting against the vertical wall 20. Note that there may be one screw hole 32a, or multiple screw holes 32a may be formed along the circumferential direction of the mounting member 3. When multiple screw holes 32a are formed, the retaining portions 7 may be inserted into all of the screw holes 32a, or only some of the screw holes 32a. Furthermore, the retaining portion 7 is preferably a screw member, but may also be configured such that a part of the first raised portion 32 is a convex portion that protrudes toward the vertical wall 20, or such that a convex member is attached to the first raised portion 32. In short, the retaining portion 7 may have any form as long as it can abut against the vertical wall 20 and press the vertical wall 20 toward the side surface 10b of the housing 10.

[0036] As shown in FIG. 8 , the second cut-and-raised portion 33 is a portion to which the connecting member 4 is fixed. The second cut-and-raised portion 33 is formed facing the side surface 10b of the housing 10. The second cut-and-raised portion 33 has a fixing hole (not shown) for fixing the connecting member 4 with a fixing member 43 such as a screw. The second cut-and-raised portion 33 also has a hook portion 33a for hooking the connecting member 4. As shown in FIG. 8 , the hook portion 33a is also formed on the first cut-and-raised portion 32, but it does not necessarily have to be formed on the first cut-and-raised portion 32. As an example, the hook portion 33a is configured as an inverted L-shape formed in a recessed portion of the upper edge of the second cut-and-raised portion 33. A portion of this recessed portion functions as a support portion 33b for supporting the temporary fixing spring 10g attached to the side surface 10b of the housing 10. The ventilation fan main body 1 inserted into the inner periphery of the mounting member 3 is supported by the mounting member 3 by the temporary fixing spring 10g being caught in the concave support portion 33b. This prevents the ventilation fan main body 1 from falling even if it tilts or rattles. In addition, the work of fixing the mounting flange portion 10d of the ventilation fan main body 1 and the flat portion 30 of the mounting member 3 with the fixing member 8 becomes easy.

[0037] As shown in Figures 1 and 2, the connecting member 4 is a metal member that connects the mounting member 3 to the anchor bolt 203 suspended above the ceiling 202. As shown in Figure 8, the connecting member 4 is attached to the outer peripheral surface of the second cut-and-raised portion 33. The connecting member 4 is configured as an elongated flat plate formed into an L-shape, and has a first wall body 40 and a second wall body 41.

[0038] As shown in FIG. 8 , the first wall 40 is an upwardly extending portion whose lower end is attached to the second cut-and-raised portion 33 of the mounting member 3 by a fixing member 43. As shown in FIG. 9 , the first wall 40 is formed with a fixing hole 40b into which the fixing member 43 is inserted and a hooking portion 40c that hooks onto the hooking portion 33a formed on the second cut-and-raised portion 33. As an example, the hooking portion 40c is configured by recessing a portion of the vertical edge of the first wall 40 toward the inner periphery of the mounting member 3. As shown in FIG. 8 , the connecting member 4 is attached to the outer periphery of the mounting member 3 by hooking the hooking portion 40c onto the hooking portion 33a of the second cut-and-raised portion 33 and fixing it to the second cut-and-raised portion 33 with the fixing member 43. The hooking portion 40c is not limited to the configuration shown in the figure and may have other shapes as long as it can hook onto the hooking portion 33a of the second cut-and-raised portion 33. 9, the first wall 40 is provided with a narrowed portion 40a that protrudes toward the outer periphery of the mounting member 3. The narrowed portion 40a is provided to increase the strength of the first wall 40. As an example, the narrowed portion 40a is provided in a certain region extending upward from the lower end of the first wall 40. The first wall 40 may be configured to be fixed to the side surface 10b of the housing 10.

[0039] 8 and 9, the second wall 41 extends from the upper end of the first wall 40 in a direction away from the ventilation fan main body 1. A connecting hole 41a into which the anchor bolt 203 is inserted is formed in the second wall 41. As shown in FIGS. 8 and 9, the connecting hole 41a is formed by cutting out a U-shape from the tip of the second wall 41 toward the first wall 40. In addition, a stopper portion 41b bent downward is formed at the tip of the second wall 41.

[0040] 1 and 2, two nuts 42 are attached to each anchor bolt 203, arranged one above the other. In the connecting member 4, the anchor bolt 203 is inserted into the connecting hole 41a so that the second wall body 41 is disposed between the two nuts 42. When the nuts 42 are tightened, the second wall body 41 is sandwiched between the two nuts 42, and the connecting member 4 is attached to the anchor bolt 203.

[0041] The stopper portion 41b comes into contact with the upper nut 42 and serves to prevent the anchor bolt 203 from coming out of the connecting hole 41a when the fastened state of the nut 42 loosens and the anchor bolt 203 and the connecting member 4 move relatively in the horizontal direction. The stopper portion 41b may be configured to be bent upward from the tip end of the second wall body 41. In this case, the stopper portion 41b is able to come into contact with the upper nut 42.

[0042] As shown in FIG. 1, the decorative grill 5 is disposed so as to cover the installation hole 200a from the indoor 201 side. The decorative grill 5 is a design component that conceals internal components such as the fan 11 disposed inside the housing 10 so that they cannot be seen from the indoor 201. This prevents the appearance of the ventilation fan 100 from being marred when viewed from the indoor 201 side. As shown in FIG. 2, the decorative grill 5 has a lattice portion 50 through which air from the indoor 201 can pass, a frame portion 51 attached to the periphery of the lattice portion 50, and a spring 52 for fixing the decorative grill 5 to the fan casing 12. As shown in FIG. 3, the decorative grill 5 is fixed to the fan casing 12 by hooking the spring 52 onto a spring fixing component 12c attached to the fan casing 12.

[0043] Next, a construction procedure for installing the ventilation fan 100 according to this embodiment on the ceiling 200 will be described. First, as shown in Fig. 8, the connecting member 4 is attached to the second cut-and-raised portion 33 of the mounting member 3. The connecting member 4 is attached to the mounting member 3 by hooking the latch portion 40c onto the hook portion 33a of the second cut-and-raised portion 33 and fixing the connecting member 4 to the second cut-and-raised portion 33 with the fixing member 43 inserted into the fixing holes (not shown) and fixing holes 40b of the second cut-and-raised portion 33.

[0044] Next, as shown in FIG. 1, the mounting member 3 is placed along the opening edge of the installation hole 200a, and the connecting member 4 is attached to the anchor bolt 203 suspended from the attic space 202. The anchor bolt 203 of the connecting member 4 is inserted into the connecting hole 41a so that the second wall body 41 is positioned between the two nuts 42. The connecting member 4 is temporarily fixed to the anchor bolt 203 by sandwiching the second wall body 41 between the two loosely tightened nuts 42. Then, as shown in FIG. 2, the mounting member 3 is fixed to the lightweight reinforcing bar 400 installed in the attic space 202. The mounting member 3 is fixed to the lightweight reinforcing bar 400 by attaching the fixing bracket 35 to the lightweight reinforcing bar 400 with a fixing member (not shown). After the mounting member 3 is fixed to the lightweight reinforcing bar 400, the two nuts 42 are tightly tightened to permanently fix the connecting member 4 to the anchor bolt 203.

[0045] Next, the duct connection member 2 is attached to the mounting member 3. As shown in Figures 11 and 12, the duct connection member 2 is attached to the mounting member 3 by overlapping the upper surface of the flange portion 20b of the vertical wall 20 with the lower surface of the flat portion 30, inserting the fixing members 9 into the fixing holes 30b of the flat portion 30 and the fixing holes 20c of the flange portion 20b, and joining the flat portion 30 and the flange portion 20b.

[0046] In a configuration in which the duct 300 is connected to the connection portion 21 of the duct connection member 2, such as the ventilation fan 100 according to this embodiment, an overlap between the connection portion 21 and the duct 300 is required, so the length of the connection portion 21 must be increased by the amount of the overlap. Furthermore, a shutter 6 that opens and closes due to wind pressure is installed inside the connection portion 21. Therefore, as shown in FIG. 12(A), when the lower end of the vertical wall 20 of the duct connection member 2 is attached to the mounting member 3, the weight of the connection portion 21 and the shutter 6 may cause the duct connection member 2 to tilt significantly from its lower end toward the duct 300. If the duct connection member 2 tilts too much, the vertical wall 20 may be positioned off-center, making it difficult to connect the side surface 10b of the ventilation fan main body 1 inserted inside the mounting member 3 to the duct connection member 2. Insufficient connection between the ventilation fan main body 1 and the duct connection member 2 may result in insufficient ventilation airflow due to wind leakage or moisture leakage to the ceiling 200.

[0047] 11 and 12(B), in the ventilation fan 100 according to this embodiment, a holding part 7 made of a screw member is inserted into the threaded hole 32a formed in the first raised portion 32, and the tip of the holding part 7 is brought into contact with the vertical wall 20 to press the vertical wall 20 against the side surface 10b of the housing 10. This prevents the duct connection member 2 from tilting, allowing the vertical wall 20 to be positioned at the desired position. At this time, the force with which the holding part 7 presses against the vertical wall 20 can be adjusted by adjusting the fastening state of the holding part 7 inserted into the threaded hole 32a. Note that adjusting the fastening state refers to the operator changing the tightening torque of the holding part 7 to tighten or loosen the holding part 7.

[0048] Next, the ventilation fan body 1 is lifted up to the ceiling 200 and inserted into the inner peripheral side of the mounting member 3 from below. When the ventilation fan body 1 is inserted to a certain height, the protrusions 10f provided on the outer peripheral edge of the top surface 10a fit into the fittings 20a of the vertical wall 20. In the ventilation fan 100 according to this embodiment, the holding portion 7 prevents the duct connection member 2 from tilting, so the protrusions 10f fit securely into the fittings 20a of the vertical wall 20, and the ventilation fan body 1 can be easily attached to the duct connection member 2.

[0049] Furthermore, when the ventilation fan body 1 is inserted to a certain height, the temporary fixing spring 10g attached to the side surface 10b of the housing 10 catches on the concave support portion 33b formed in the second cut-and-raised portion 33, and the ventilation fan body 1 is supported by the mounting member 3. This prevents the ventilation fan body 1 from falling even if it tilts or rattles.

[0050] Next, the mounting flange 10d of the ventilation fan main body 1 is brought into contact with the flat portion 30 of the mounting member 3, and the mounting flange 10d and the flat portion 30 are fixed with the fixing member 8, thereby attaching the ventilation fan main body 1 to the mounting member 3. Finally, the decorative grille 5 is installed on the ceiling 200 so as to cover the installation hole 200a from below and cover the air intake 10c of the housing 10. The decorative grille 5 is fixed to the fan casing 12 by hooking the spring 52 onto the spring fixing part 12c provided on the fan casing 12.

[0051] As described above, the ventilation fan 100 according to this embodiment includes a box-shaped housing 10 having an intake port 10c for drawing in air from a room 201 and an exhaust port 10e formed in a side surface 10b for discharging the drawn air; a ventilation fan main body 1 having a fan 11 disposed inside the housing 10; a duct connection member 2 attached to the side surface 10b of the housing 10 so as to communicate with the exhaust port 10e and to which a duct 300 is connected; and a frame-shaped mounting member 3 disposed along the edge of the installation hole 200a and into which the ventilation fan main body 1 is inserted. The duct connection member 2 has a vertical wall 20 fixed at its lower end to the mounting member 3, extends upward from the mounting member 3, and is attached to the side surface 10b of the housing 10. The vertical wall 20 also has a connection portion 21 extending from the vertical wall 20 in a direction away from the ventilation fan main body 1 and to which the duct is connected. The inner peripheral edge of the mounting member 3 has a first raised portion 32 extending upward and facing the vertical wall 20. The first raised portion 32 is provided with a holding portion 7 that abuts against the vertical wall 20 and presses the vertical wall 20 against the side surface 10b of the housing 10.

[0052] Therefore, in the ventilation fan 100 according to this embodiment, even if the weight of the connection portion 21 and the shutter 6 causes the duct connection member 2 to tilt toward the exhaust port, the holding portion 7 presses the vertical wall 20 toward the side surface 10b of the housing 10, thereby preventing the duct connection member 2 from tilting. Therefore, in the ventilation fan 100 according to this embodiment, the vertical wall 20 can be positioned at the target position, and the duct connection member 2 can be reliably attached to the side surface 10b of the ventilation fan main body 1 inserted into the inner peripheral side of the mounting member 3.

[0053] Moreover, the ventilation fan 100 according to this embodiment further includes a connecting member 4 that connects the mounting member 3 to an anchor bolt 203 suspended from a ceiling space 202 formed above the ceiling 200. The mounting member 3 has a rectangular frame shape when viewed from above, and has a first cut-and-raised portion 32 provided on one of the four inner peripheral edges of the mounting member 3 to which the vertical wall 20 is attached, and second cut-and-raised portions 33 provided on two of the inner peripheral edges of the four sides of the mounting member 3 adjacent to the side on which the first cut-and-raised portion 32 is provided. The connecting member 4 is attached to the second cut-and-raised portions 33.

[0054] Therefore, in the ventilation fan 100 according to this embodiment, the connecting members 4 are attached to the two sides adjacent to the side on which the duct connection member 2 is attached out of the four inner peripheral edges of the mounting member 3, so that the mounting member 3 with the duct connection member 2 attached can be attached to the anchor bolt 203 in a balanced and stable manner.

[0055] Furthermore, the first cut-and-raised portion 32 is formed with a screw hole 32a into which the retaining portion 7 is inserted. The retaining portion 7 is made of a screw member, and is configured so that the strength with which it presses against the vertical wall 20 can be adjusted by adjusting the fastening state of the retaining portion 7 inserted into the screw hole 32a. Therefore, even if the duct connection member 2 is tilted significantly, the tilt of the duct connection member 2 can be reliably suppressed by adjusting the strength with which it presses against the vertical wall 20.

[0056] Furthermore, a protrusion 10f is provided on the top surface of the housing 10. The duct connection member 2 is provided with a fitting portion 20a that fits into the protrusion 10f. The duct connection member 2 is attached to the side surface 10b of the housing 10 by fitting the fitting portion 20a of the ventilation fan main body 1, which is inserted into the inner periphery of the mounting member 3, into the protrusion 10f. Therefore, in the ventilation fan 100 according to this embodiment, the duct connection member 2 can be attached to the side surface 10b of the housing 10 simply by inserting the ventilation fan main body 1 into the inner periphery of the mounting member 3.

[0057] The configurations shown in the above embodiments are merely examples, and may be combined with other known technologies, and parts of the configurations may be omitted or modified without departing from the spirit of the invention.

[0058] Various aspects of the present disclosure are summarized below as appendices.

[0059] (Appendix 1) A ventilation fan that is fitted into an installation hole formed in a ceiling and installed on the ceiling, a ventilation fan body having a box-shaped housing formed with an air intake port for drawing in indoor air and an exhaust port for exhausting the drawn air on a side surface, and a fan disposed inside the housing; a duct connecting member attached to a side surface of the housing so as to communicate with the exhaust port, and to which a duct is connected; a frame-shaped mounting member disposed along an opening edge of the installation hole and into which the ventilation fan main body is inserted; Equipped with The duct connection member is a vertical wall having a lower end fixed to the mounting member, extending upward from the mounting member, and attached to a side surface of the housing; and a connecting portion extending from the vertical wall in a direction away from the ventilation fan main body and to which a duct is connected, A first raised portion is provided on an inner peripheral edge of the mounting member, the first raised portion extending upward and facing the vertical wall, The ventilation fan is characterized in that the first raised portion is provided with a holding portion that abuts against the vertical wall and presses the vertical wall against the side surface of the housing. (Appendix 2) The method further includes a connecting member that connects the mounting member to an anchor bolt suspended in a ceiling space formed above the ceiling, The mounting member has a rectangular frame shape in a plan view, The first raised portion is provided on one of the four inner peripheral edges of the mounting member to which the vertical wall is attached, Second cut-out portions are provided on two sides of the inner peripheral edges of the four sides of the mounting member that are adjacent to the side on which the first cut-out portion is provided, The ventilation fan described in Appendix 1, wherein the connecting member is attached to the second cut-and-raised portion. (Appendix 3) a screw hole into which the holding portion is inserted is formed in the first raised portion; The ventilation fan described in Appendix 1 or 2 is characterized in that the retaining portion is composed of a screw member, and the strength of pressing against the vertical wall can be adjusted by adjusting the fastening state inserted into the screw hole. (Appendix 4) A protrusion is provided on the top surface of the housing, The duct connection member is provided with a fitting portion that fits into the protrusion, The ventilation fan described in any one of Appendices 1 to 3, characterized in that the duct connection member is attached to the side of the housing by fitting the fitting portion of the ventilation fan main body inserted into the inner side of the mounting member to the protrusion portion. (Appendix 5) A frame-shaped mounting member into which a ventilation fan body having a box-shaped housing and a fan arranged inside the housing is inserted into an inner peripheral side, and to which a duct connecting member having a vertical wall attached to a side surface of the housing and a connecting portion to which a duct is connected is attached, a first raised portion formed on an inner peripheral edge of the frame and extending upward to face the vertical wall; a holding portion that abuts against the vertical wall and presses the vertical wall against the side surface of the housing. (Appendix 6) The plan view is a rectangular frame shape, The first raised portion is provided on one of the four inner peripheral edges, Second raised portions are provided on two of the inner peripheral edges of the four sides of the mounting member that are perpendicular to the side on which the first raised portions are provided, The mounting member described in Appendix 5, characterized in that a connecting member attached to an anchor bolt suspended from a ceiling structure is fixed to the second raised portion. (Appendix 7) a screw hole into which the holding portion is inserted is formed in the first raised portion; The mounting member described in Appendix 5 or 6, characterized in that the retaining portion is composed of a screw member and is configured so that the strength of pressing against the vertical wall can be adjusted by adjusting the fastening state inserted into the screw hole. [Explanation of symbols]

[0060] 1 ventilation fan body, 2 duct connection member, 3 mounting member, 4 connecting member, 5 decorative grill, 6 shutter, 7 holding portion, 8, 9, 43 fixing member, 10 housing, 10a top surface, 10b side surface, 10c intake port, 10d mounting flange portion, 10e exhaust port, 10f protrusion portion, 10g temporary fixing spring, 10h, 20c, 30a, 30b, 40b fixing hole, 11 fan, 12 fan casing, 12a intake port, 12b outlet port, 12c spring fixing part, 12d, 33b support portion, 12e protective wall, 13 motor, 13a shaft, 14 blade, 15 power connection device, 16 terminal cover, 16a rotating shaft, 16b finger hook portion, 17 motor electric wire, 18 bush, 20 Vertical wall, 20a fitting portion, 20b, 31 flange portion, 21 connection portion, 30 flat portion, 32 first cut-up portion, 32a screw hole, 33 second cut-up portion, 33a hook portion, 34 third cut-up portion, 35 fixing bracket, 35a elongated hole, 40 first wall body, 40a narrowing portion, 40c hooking portion, 41 second wall body, 41a connecting hole, 41b stopper portion, 42 nut, 50 lattice portion, 51 frame portion, 52 spring, 100 ventilation fan, 200 ceiling, 200a installation hole, 201 indoors, 202 attic, 203 anchor bolt, 300 duct, 400 light steel bar.

Claims

1. A ventilation fan that is fitted into an installation hole formed in a ceiling and installed on the ceiling, a ventilation fan body having a box-shaped housing formed with an air intake port for drawing in indoor air and an exhaust port for exhausting the drawn air on a side surface, and a fan disposed inside the housing; a duct connecting member attached to a side surface of the housing so as to communicate with the exhaust port, and to which a duct is connected; a frame-shaped mounting member disposed along an opening edge of the installation hole and into which the ventilation fan main body is inserted; Equipped with The duct connection member is a vertical wall having a lower end fixed to the mounting member, extending upward from the mounting member, and attached to a side surface of the housing; and a connecting portion extending from the vertical wall in a direction away from the ventilation fan main body and to which a duct is connected, a first raised portion extending upward and facing the vertical wall is provided on an inner peripheral edge of the mounting member; The ventilation fan is characterized in that the first raised portion is provided with a holding portion that abuts against the vertical wall and presses the vertical wall against the side surface of the housing.

2. The method further includes a connecting member that connects the mounting member to an anchor bolt suspended in a ceiling space formed above the ceiling, The mounting member has a rectangular frame shape in a plan view, The first raised portion is provided on one of the four inner peripheral edges of the mounting member to which the vertical wall is attached, Second raised portions are provided on two sides of the inner peripheral edges of the four sides of the mounting member that are adjacent to the side on which the first raised portion is provided, The ventilation fan according to claim 1 , wherein the connecting member is attached to the second cut-and-raised portion.

3. a screw hole into which the holding portion is inserted is formed in the first raised portion; The ventilation fan according to claim 1 or 2, characterized in that the retaining portion is composed of a screw member, and the strength with which it presses against the vertical wall can be adjusted by adjusting the fastening state of the member inserted into the screw hole.

4. A protrusion is provided on the top surface of the housing, The duct connection member is provided with a fitting portion that fits into the protrusion, The ventilation fan according to claim 1 or 2, characterized in that the duct connecting member is attached to the side of the housing by fitting the fitting portion of the ventilation fan main body inserted into the inner side of the mounting member to the protrusion portion.

5. A frame-shaped mounting member into which a ventilation fan body having a box-shaped housing and a fan arranged inside the housing is inserted into an inner peripheral side, and to which a duct connecting member having a vertical wall attached to a side surface of the housing and a connecting portion to which a duct is connected is attached, a first raised portion formed on an inner peripheral edge of the frame and extending upward to face the vertical wall; a holding portion that abuts against the vertical wall and presses the vertical wall against the side surface of the housing.

6. The plan view is a rectangular frame shape, The first raised portion is provided on one of the four inner peripheral edges, a second cut-out portion is provided on each of two inner peripheral edges of the four sides of the mounting member that are perpendicular to the side on which the first cut-out portion is provided; The mounting member according to claim 5, wherein a connecting member attached to an anchor bolt suspended from a ceiling structure is fixed to the second raised portion.

7. a screw hole into which the holding portion is inserted is formed in the first raised portion; The mounting member according to claim 5 or 6, characterized in that the retaining portion is composed of a screw member, and the strength of pressing against the vertical wall can be adjusted by adjusting the fastening state inserted into the screw hole.

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