JP7809084B2 - Ventilation fans and mounting parts - Google Patents

Description

This disclosure relates to a ventilation fan and mounting member for installation on the ceiling of a building.

Conventionally, ventilation fans are known that are installed on a ceiling by fitting into an installation hole formed in the ceiling. They 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 comprising a ventilation device main body, a duct connection frame, and an auxiliary frame. The ventilation device main body is configured with an intake port formed to draw in indoor air and an exhaust port formed on its side to exhaust 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.

To install the ventilation fan described in 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 fastening the lower end of the vertical wall to the auxiliary frame, which serves as a mounting member. The ventilation device main body is then 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 the ventilation device main body is fixed to the auxiliary frame.

Japanese Patent Application Laid-Open No. 2001-4187

In a configuration in which a duct is connected to a connector of a duct connection frame, such as the ventilation fan disclosed in Patent Document 1, an overlap is required between the connector and the duct, so the length of the connector needs to 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 connector. Therefore, when the lower end of the vertical wall of the duct connection frame is attached to the auxiliary frame, the weight of the connector and shutter may cause the duct connection frame to tilt significantly toward the duct connection, with the lower end as the base point. If the duct connection frame is tilted too far, the vertical wall will 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. If the connection between the ventilation device main body and the duct connection frame is insufficient, wind leakage may result in insufficient ventilation airflow or moisture leaking to the ceiling.

The present disclosure has been made in light of the above, and aims to provide a ventilation fan that can prevent tilting of a duct connection member attached to a mounting member.

To solve the above-mentioned problems and achieve the objectives, 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 the 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.

The ventilation fan disclosed herein has the advantage of being able to prevent tilting of the duct connection member attached to the mounting member.

FIG. 1 is an exploded perspective view of a ventilation fan according to an embodiment; 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; FIG. 1 is a longitudinal cross-sectional view showing a ventilation fan according to an embodiment. FIG. 1 is a perspective view showing a ventilation fan body according to an embodiment. FIG. 1 is a bottom view of the ventilation fan according to the embodiment, seen from the indoor side, with the decorative grill removed. 1 is a perspective view of a ventilation fan according to an embodiment, seen from above the ceiling; 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. FIG. 10 is a perspective view showing a state in which a connecting member is attached to an attachment member according to an embodiment. FIG. 1 is a perspective view showing a connecting member according to an embodiment; 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. 1 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; FIG. 10 is an explanatory diagram illustrating the operation of the holding portion of the ventilation fan according to the embodiment;

The ventilation fan and mounting member according to the embodiment of the present disclosure will be described in detail below with reference to the drawings.

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 the ceiling 200 in the drawing indicates the attic space 202, and the lower side of the ceiling 200 in the drawing indicates the room 201. Also, in FIGS. 1 and 2, a portion of the 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. The mounting member 3 and the 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 ceiling space. The mounting member 3 and the connecting member 4 are omitted from FIG. 6. FIG. 7 is an explanatory diagram of part VII shown in FIG. 3, schematically illustrating how the duct connection member is attached to the ventilation fan main body.

As shown in Figures 1 to 3, the ventilation fan 100 according to this embodiment is installed on the ceiling 200 by fitting into an installation hole 200a formed in the ceiling 200. It is a device that draws in air from the room 201 and exhausts it to the outside or another indoor space through a duct 300. When the duct 300 connects to the outside of the room, the ventilation fan 100 functions as an exhaust ventilation fan that exhausts air from the room 201 to the outside. In this case, the 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 the duct 300 connects to another indoor space, the ventilation fan 100 functions as a circulation ventilation fan that circulates air within the room 201.

The installation hole 200a formed in the ceiling 200 connects the room 201 to the attic 202. While the installation hole 200a is shown as a rectangular shape by way of example, it may have other shapes. The attic 202 is the space formed between the ceiling 200 and the 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, multiple anchor bolts 203 are suspended from the upper floor slab in the attic 202.

As shown in Figures 1 to 3, the ventilation fan 100 comprises 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 disposed inside the housing 10.

As shown in Figures 1 to 4, the housing 10 has a rectangular parallelepiped shape and has a top surface 10a and four side surfaces 10b. The bottom surface of the housing 10, opposite the top surface 10a, is open as an air intake port 10c. A mounting flange portion 10d is provided on the periphery of the air intake port 10c, extending away from the center of the air intake port 10c. A fixing hole 10h is formed in the mounting flange portion 10d, into which a fixing member 8, such as a screw, for attaching the mounting member 3 is inserted.

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 on only a portion of the top surface 10a.

As shown in Figures 1 and 4, one of the four side surfaces 10b has an exhaust port 10e formed therein for discharging 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 welding nuts to leaf springs and are fixed with screws from the inside of the housing 10. The temporary fixing springs 10g are arranged so that the leaf springs extend diagonally downward toward the outer periphery of the mounting member 3. As shown in Figure 1, the temporary fixing springs 10g are provided to temporarily fix the ventilation fan main body 1 to the mounting member 3 when the ventilation fan main body 1 is inserted and attached to the inner periphery of the mounting member 3.

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

As shown in Figures 3 and 5, the fan casing 12 has an inlet 12a that draws in air that has flowed into the housing 10 through the air inlet 10c, and an outlet 12b that discharges air from the interior of the fan casing 12 toward the exhaust port 10e. The fan casing 12 is installed with the inlet 12a facing the air inlet 10c and the outlet 12b facing the exhaust port 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 Figure 3, a spring fixing member 12c is attached by a screw or latch 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.

As shown in Figures 3 and 5, a power connection device 15 for connecting to an external power source (not shown) is provided inside the housing 10. The power connection device 15 is located in an accommodation space surrounded by the outer surface of the fan casing 12 and the inner surface of the housing 10. As shown in Figure 3, the 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 around the rotation shaft 16a. The terminal cover 16 is also surrounded on all sides by a protective wall 12e provided on the fan casing 12. The terminal cover 16 also has a finger hook 16b for an operator to hook their finger on when opening or closing the terminal cover 16.

As shown in Figure 5, when the terminal cover 16 is open, the power connection device 15 is accessible, allowing an external power cable (not shown) that connects an external power source (not shown) to the power connection device 15 to be connected to the power connection device 15 from inside the room 201. On the other hand, as shown in Figure 3, when the terminal cover 16 is closed, the terminal cover 16 and protective wall 12e can improve the airtightness of the space that houses the power connection device 15.

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

The motor 13 and power connection device 15 are electrically connected by a motor cable 17. As shown in FIG. 6, the motor cable 17 is routed along the top surface 10a of the housing 10 and is drawn into the interior 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 connection device 15 and the motor cable 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.

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 portion 21 that protrudes from the wall surface of the vertical wall 20 and to which the duct 300 is connected.

The vertical wall 20 is positioned with its wall surface facing the side surface 10b of the housing 10, where 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 mating portion 20a on one wall surface facing the side surface 10b of the housing 10, which is fitted with the protrusion 10f on the top surface 10a of the housing 10, and a connecting portion 21 on the other wall surface. As an example, the mating portion 20a protrudes from the wall surface of the vertical wall 20 toward the protrusion 10f and is recessed so that the protrusion 10f can be fitted into it. 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. Multiple fixing holes 20c, into which fixing members 9 such as screws can be inserted, are formed in the flange portion 20b along the lower edge of the vertical wall 20.

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 in which tape is wrapped to secure the duct 300 to the connection portion 21 is clear, making the wrapping process 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 also be composed of three or more cylinders with different outer diameters, or may be composed of a cylinder with a single outer diameter.

As shown in Figure 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 its own weight when the ventilation fan 100 is stopped. By installing the shutter 6 inside the connection part 21, for example, if 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.

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

As shown in Figures 1 and 2, the mounting member 3 is a frame-shaped member that is positioned along the opening edge of the installation hole 200a and attached to anchor bolts 203 via connecting members 4, with the ventilation fan main body 1 inserted into its inner periphery. As shown in Figure 8, the mounting member 3 is, for example, a square frame shape 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 square frame shape, a flange portion 31 formed by bending downward along the outer edge 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 edge of the flat portion 30 upward.

As shown in Figures 1 and 8, the flat portion 30 has multiple fixing holes 30a, into which fixing members 8 are inserted, formed at intervals 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.

As shown in Figures 1 and 2, a duct connection member 2 is attached to one of the four flat portions 30. As shown in Figure 11, a fixing hole 30b is formed in the flat portion 30, into which a fixing member 9 such as a screw is 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, inserting the fixing member 9 into the fixing hole 30b in the flat portion 30 and the fixing hole 20c in the flange portion 20b, and joining the flat portion 30 and the flange portion 20b.

As shown in Figures 2 and 8, fixing brackets 35 are provided on the flat portions 30 on the four sides to which the duct connection member 2 is not attached. The fixing brackets 35 are provided to secure the mounting member 3 to lightweight reinforcing bars 400 installed 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 lightweight reinforcing bars 400 by attaching the fixing brackets 35 to the lightweight reinforcing bars 400 with fixing members (not shown). This makes it possible to suppress vibrations during operation of the ventilation fan 100.

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 within the frame of the mounting member 3, the outer peripheral surface of the flange portion 31 abuts against the inner surface of the installation hole 200a, and the inner peripheral surface abuts against the outer peripheral surface of the mounting flange portion 10d.

As shown in FIG. 8 , the first raised portion 32 is formed on the flat portion 30 of the inner peripheral edge of the four sides of the mounting member 3, where the duct connection member 2 is attached. The second raised portion 33 is formed on the flat portion 30 of the inner peripheral edge of the four sides of the mounting member, which form two sides adjacent to the side on which the first raised portion 32 is provided. The third raised portion 34 is formed on the flat portion 30 of the inner peripheral edge of the four sides of the mounting member 3, which forms the side opposite the side on which the first raised portion 32 is provided.

As shown in Figures 8 and 10 to 12, the first raised portion 32 is disposed opposite the wall surface of the vertical wall 20 of the duct connection member 2. The first raised portion 32 is formed with a screw hole 32a into which a retaining portion 7 is inserted, which abuts against the vertical wall 20 and presses 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 portion 7 is a screw member. The vertical wall 20 is pressed against the side surface 10b of the housing 10 by the tip of the retaining portion 7 inserted into the screw hole 32a abutting against it. 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. If 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. Additionally, while a screw member is preferred for the retaining portion 7, it may also be configured such that a portion 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.

As shown in FIG. 8 , the second raised portion 33 is the portion to which the connecting member 4 is fixed. The second raised portion 33 is formed facing the side surface 10b of the housing 10. The second 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 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 raised portion 32, but it does not necessarily have to be formed on the first 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 raised portion 33. Furthermore, a portion of this recess 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 body 1 inserted into the inner periphery of the mounting member 3 is supported by the mounting member 3 as the temporary fixing spring 10g catches on the concave support portion 33b. This prevents the ventilation fan body 1 from falling even if it tilts or rattles. It also simplifies the process of fixing the mounting flange portion 10d of the ventilation fan body 1 to the flat portion 30 of the mounting member 3 with the fixing member 8.

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 periphery of the second 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.

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 hook portion 40c that hooks onto the hook portion 33a formed on the second cut-and-raised portion 33. As an example, the hook 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 hook portion 40c onto the hook portion 33a of the second cut-and-raised portion 33 and securing it to the second cut-and-raised portion 33 with the fixing member 43. The hook 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 hook portion 33a of the second cut-and-raised portion 33. As shown in FIG. 9 , the first wall 40 has a tapered portion 40a that protrudes toward the outer periphery of the mounting member 3. The tapered portion 40a is provided to increase the strength of the first wall 40. As an example, the tapered portion 40a is provided in a certain area extending upward from the lower end of the first wall 40. The first wall 40 may also be configured to be fixed to the side surface 10b of the housing 10.

As shown in Figures 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. The second wall 41 has a connecting hole 41a into which the anchor bolt 203 is inserted. As shown in Figures 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.

As shown in Figures 1 and 2, two nuts 42 are attached to each anchor bolt 203, one above the other. The anchor bolt 203 is inserted into the connecting hole 41a of the connecting member 4 so that the second wall body 41 is positioned 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.

When the nut 42 loosens and the anchor bolt 203 and connecting member 4 move relative to each other in the horizontal direction, the stopper portion 41b comes into contact with the upper nut 42, preventing the anchor bolt 203 from coming out of the connecting hole 41a. The stopper portion 41b may be bent upward from the tip of the second wall body 41. In this case, the stopper portion 41b can come into contact with the upper nut 42.

As shown in FIG. 1, the decorative grill 5 is positioned 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 arranged 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 securing the decorative grill 5 to the fan casing 12. As shown in FIG. 3, the decorative grill 5 is secured to the fan casing 12 by hooking the spring 52 onto a spring securing component 12c attached to the fan casing 12.

Next, the installation procedure for installing the ventilation fan 100 according to this embodiment on the ceiling 200 will be described. First, as shown in Figure 8, the connecting member 4 is attached to the second cut-out 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-out portion 33 and fixing it to the second cut-out portion 33 with a fixing member 43 inserted into the fixing holes (not shown) and fixing holes 40b of the second cut-out portion 33.

Next, as shown in FIG. 1, the mounting member 3 is placed along the edge of the installation hole 200a, and the connecting member 4 is attached to the anchor bolt 203 suspended from the ceiling 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 ceiling 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.

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 member 9 into the fixing hole 30b of the flat portion 30 and the fixing hole 20c of the flange portion 20b, and joining the flat portion 30 and the flange portion 20b.

In a configuration in which the duct 300 is connected to the connection portion 21 of the duct connection member 2, as in the ventilation fan 100 of this embodiment, an overlap is required between the connection portion 21 and the duct 300, 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 Figure 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 connection side of the duct 300. If the duct connection member 2 tilts too much, the vertical wall 20 will 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.

As shown in Figures 11 and 12(B), in the ventilation fan 100 according to this embodiment, a retaining member 7 made of a screw is inserted into the threaded hole 32a formed in the first raised portion 32, and the tip of the retaining member 7 is brought into abutment against the vertical wall 20, pressing 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 strength with which the retaining member 7 presses against the vertical wall 20 can be adjusted by adjusting the fastening state of the retaining member 7 inserted into the threaded hole 32a. Note that adjusting the fastening state refers to the operator changing the tightening torque of the retaining member 7 to tighten or loosen the retaining member 7.

Next, the ventilation fan body 1 is lifted up to the ceiling 200 and inserted into the inner periphery of the mounting member 3 from below. Once the ventilation fan body 1 has been inserted to a certain height, the protrusion 10f on the outer periphery of the top surface 10a fits into the fitting 20a of the vertical wall 20. In the ventilation fan 100 according to this embodiment, the retaining portion 7 prevents the duct connection member 2 from tilting, so the protrusion 10f fits securely into the fitting 20a of the vertical wall 20, allowing the ventilation fan body 1 to be easily attached to the duct connection member 2.

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.

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 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 that it covers the installation hole 200a from below and covers 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.

As described above, the ventilation fan 100 according to this embodiment comprises a box-shaped housing 10 having an intake port 10c for drawing in air from the room 201 and an exhaust port 10e formed in its side surface 10b for discharging the drawn-in 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 positioned along the opening 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 connecting portion 21 extends from the vertical wall 20 away from the ventilation fan main body 1 and is connected to the duct. The inner peripheral edge of the mounting member 3 is provided with a first raised portion 32 that extends upward and faces the vertical wall 20. The first raised portion 32 is provided with a retaining portion 7 that abuts against the vertical wall 20 and presses the vertical wall 20 toward the side surface 10b of the housing 10.

Therefore, in the ventilation fan 100 according to this embodiment, even if the weight of the connection portion 21 and 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, 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 desired position, allowing the duct connection member 2 to be securely attached to the side surface 10b of the ventilation fan main body 1 inserted into the inner periphery of the mounting member 3.

The ventilation fan 100 according to this embodiment also includes a connecting member 4 that connects the mounting member 3 to an anchor bolt 203 suspended from the attic 202 formed above the ceiling 200. The mounting member 3 has a rectangular frame shape when viewed from above, and a first raised portion 32 is provided on one of the four inner peripheral edges of the mounting member 3 to which the vertical wall 20 is attached, and second raised portions 33 are 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 raised portion 32 is provided. The connecting member 4 is attached to the second raised portions 33.

In the ventilation fan 100 according to this embodiment, the connecting members 4 are attached to the two inner peripheries of the four sides of the mounting member 3, adjacent to the side to which the duct connection member 2 is attached. This allows the mounting member 3 with the duct connection member 2 attached to be stably attached to the anchor bolts 203 in a well-balanced manner.

The first raised portion 32 is also formed with a threaded hole 32a into which the retaining portion 7 is inserted. The retaining portion 7 is made of a screw member, and by adjusting the fastening state of the retaining portion 7 inserted into the threaded hole 32a, the strength with which it presses against the vertical wall 20 can be adjusted. Therefore, even if the duct connection member 2 is significantly tilted, 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.

In addition, 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 onto 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, onto 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.

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

The various aspects of this disclosure are summarized below as appendices.

(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 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.
(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 inner peripheral edges of the four sides 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 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,
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 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.

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 Air 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 Air 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 wire, 18 Bush, 20 Vertical wall, 20a fitting portion, 20b, 31 flange portion, 21 connection portion, 30 flat portion, 32 first raised portion, 32a screw hole, 33 second raised portion, 33a hook portion, 34 third raised portion, 35 fixing bracket, 35a elongated hole, 40 first wall body, 40a narrowed portion, 40c hook 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 ceiling space, 203 anchor bolt, 300 duct, 400 lightweight steel bar.

Claims (7)

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. 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. 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. 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 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. 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. 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. 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 with which it presses against the vertical wall can be adjusted by adjusting the fastening state of the member inserted into the screw hole.