JP7615077B2 - Ventilator - Google Patents

Description

This disclosure relates to a ventilation fan and mounting member that is installed in the ceiling of a building.

Conventionally, ventilation fans that are installed on the ceiling of a building are known. Such ceiling-mounted ventilation fans have a ventilation fan body that draws in indoor air and exhausts the indoor air to the outside through a duct connected to the ventilation fan body. The ventilation fan body is installed on the ceiling using a hole opened in the ceiling. A duct connector for connecting a duct is attached to the ventilation fan body.

As disclosed in Patent Document 1, a common method for installing a ventilation fan on the ceiling of a building is to place a frame-shaped mounting member along the periphery of a hole in the ceiling and then secure the ventilation fan body to the mounting member with screws or the like. The mounting member is either directly fixed to an anchor bolt suspended above the ceiling, or is fixed via a ceiling hanging bracket.

In the technology disclosed in Patent Document 1, the duct connection member is fixed to the mounting member, and then the fan body is attached to the duct connection member. The duct connection member has a vertical wall that is fixed to the mounting member and extends upward from the mounting member, and a connection part that extends from the vertical wall in a direction away from the fan body and to which the duct is connected.

JP 2001-4187 A

The tip of the connection part disclosed in Patent Document 1, which is the exhaust side part, is connected to an exhaust duct and has a shutter that prevents outside air from flowing back into the room through the duct when the exhaust fan is stopped. Therefore, the center of gravity of the duct connection member is closer to the exhaust side. If the duct connection member is fixed to the mounting member as in the technology disclosed in Patent Document 1, the duct connection member will tilt toward the exhaust side, making it difficult to attach the exhaust fan main body to the duct connection member, and there is a possibility that the attachment between the exhaust fan main body and the duct connection member will be insufficient. If the attachment between the exhaust fan main body and the duct connection member is insufficient, there will be a shortage of the required ventilation air volume due to air leakage from between the exhaust fan main body and the duct connection member, and moisture will leak from between the exhaust fan main body and the duct connection member to the ceiling, so it will be necessary to reattach the exhaust fan main body to the duct connection member, which will be a problem of considerable effort.

The present disclosure has been made in consideration of the above, and aims to obtain a ventilator that can suppress tilting of the duct connection member and ensure that the ventilator main body can be securely attached to the duct connection member.

In order to solve the above-mentioned problems and achieve the object, the ventilation fan according to the present disclosure is a ventilation fan that is installed on a ceiling using an installation hole formed in the ceiling, and includes a ventilation fan main body having a box-shaped housing having an intake port for drawing in indoor air and an exhaust port for discharging the drawn air on its side, a fan arranged inside the housing, a duct connection member that is attached to the side of the housing so as to communicate with the exhaust port and to which a duct is connected, a frame-shaped mounting member that is arranged along the opening edge of the installation hole and into which the ventilation fan main body is inserted on its inner periphery, and a connecting member that connects the mounting member to an anchor bolt suspended in the ceiling space formed above the ceiling . The duct connection member has a vertical wall that is fixed to the mounting member and extends upward from the mounting member, and a connecting portion that extends from the vertical wall in a direction away from the ventilation fan main body and to which the duct is connected. At least one cut-and-raised portion that extends upward is provided on the inner periphery of the mounting member. The at least one cut-and-raised portion is provided at a position that can contact the vertical wall on the outer periphery side of the mounting member relative to the vertical wall. The cut-and-raised portion provided at a position where it can come into contact with the vertical wall is inclined so as to approach the vertical wall as it extends upward, and is not fixed to the connecting member.

The ventilation fan disclosed herein has the advantage of being able to prevent the duct connection member from tilting and to securely attach the ventilation fan body to the duct connection member.

FIG. 1 is a perspective view of the ventilation fan according to the first embodiment, seen from the ceiling side, showing a state in which a decorative grill is removed from the ventilation fan body; FIG. 1 is a perspective view of the exhaust fan according to the first embodiment, seen from the indoor side, showing a state in which a decorative grill is removed from the exhaust fan body; FIG. 1 is a vertical cross-sectional view showing a ventilation fan according to a first embodiment. FIG. 4 is a diagram showing the ventilation fan according to the first embodiment as seen from the indoor side, with the decorative grill shown in FIG. 3 removed; FIG. 1 is a perspective view of a ventilation fan according to a first embodiment, seen from the ceiling side; FIG. 1 is a vertical cross-sectional view showing a ventilation fan according to a first embodiment, in which the ventilation fan is installed in the ceiling of a building; FIG. 1 is a cross-sectional perspective view showing a ventilation fan according to a first embodiment, the ventilation fan being installed in the ceiling of a building; FIG. 1 is a vertical cross-sectional view showing a schematic assembly of a ventilation fan body, a mounting member, and a connecting member according to a first embodiment; FIG. 1 is a perspective view of an anchor bolt, a connecting member, and a mounting member according to a first embodiment, viewed from above the ceiling. FIG. 1 is a perspective view showing a connecting member according to a first embodiment; FIG. 1 is a horizontal cross-sectional view showing a state in which the ventilation fan body, the mounting member, and the connecting member are assembled according to the first embodiment. FIG. 1 is a vertical cross-sectional view showing a preparation process of a method for installing a ventilation fan according to a first embodiment; FIG. 1 is a vertical cross-sectional view showing an insertion step of the installation method for the ventilation fan according to the first embodiment, illustrating a state during insertion where the elastic member is in contact with the cut and raised portion; FIG. 1 is a vertical cross-sectional view showing an insertion step of the installation method for the ventilation fan according to the first embodiment, illustrating a state after insertion in which the elastic member is located above the cut-and-raised portion; FIG. 11 is a vertical cross-sectional view showing a temporary fixing step of the installation method for the ventilation fan according to the first embodiment; FIG. 11 is a horizontal cross-sectional view showing a temporary fixing step of the installation method for the ventilation fan according to the first embodiment. FIG. 11 is a vertical cross-sectional view showing a main fixing step of the installation method for the ventilation fan according to the first embodiment; FIG. 11 is a vertical cross-sectional view illustrating a first removal step of the installation method for the ventilation fan according to the first embodiment; FIG. 11 is a vertical cross-sectional view illustrating a second removal step of the installation method for the ventilation fan according to the first embodiment;

The following describes in detail the ventilation fan and mounting components according to the embodiment with reference to the drawings.

Embodiment 1.
Fig. 1 is a perspective view of a ventilation fan 1 according to a first embodiment, seen from the ceiling space 21 side, and shows a state in which a decorative grill 6 has been removed from a ventilation fan main body 2. As shown in Fig. 1, the ventilation fan 1 includes a ventilation fan main body 2, a duct connection member 3, an attachment member 4, a coupling member 5, and a decorative grill 6.

The ceiling 20 has an installation hole 20a that connects the room to the attic 21. In FIG. 1, the upper side of the ceiling 20 is the attic 21, and the lower side of the ceiling 20 is the room. In FIG. 1, a part of the ceiling 20 is cut out to show the mounting member 4. In this embodiment, the shape of the installation hole 20a is rectangular. The ventilation fan 1 is installed on the ceiling 20 using the installation hole 20a formed in the ceiling 20. The attic 21 is formed above the ceiling 20. The ventilation fan 1 is installed from the installation hole 20a to the attic 21. The attic 21 is a space formed between the ceiling 20 and an upper floor slab (not shown). A plurality of anchor bolts 18 are suspended from the attic 21. The anchor bolts 18 are suspended from the upper floor slab.

Figure 2 is a perspective view of the ventilation fan 1 according to the first embodiment as seen from the indoor side, showing the state in which the decorative grill 6 has been removed from the ventilation fan main body 2. As shown in Figures 1 and 2, the ventilation fan main body 2 has a box-shaped housing 2a and a fan 2b arranged inside the housing 2a.

1, the housing 2a has a top surface 2c and four side surfaces 2d. As shown in FIG. 2, the housing 2a has a bottom surface 2e. The bottom surface 2e is disposed below the top surface 2c and away from the top surface 2c. The four side surfaces 2d connect the top surface 2c and the bottom surface 2e. The housing 2a has an intake port 2f for drawing in indoor air. The intake port 2f opens on the surface of the housing 2a facing the room, that is, on the bottom surface 2e of the housing 2a in this embodiment. The housing 2a is installed with the intake port 2f facing the room. On the bottom surface 2e, a mounting flange portion 2h is formed on the periphery of the intake port 2f in a direction away from the center of the intake port 2f. As shown in FIG. 1, the housing 2a has an exhaust port 2g for exhausting the intake air. The exhaust port 2g opens on one of the four side surfaces 2d of the housing 2a.

Figure 3 is a vertical cross-sectional view showing the ventilation fan 1 according to the first embodiment. In Figure 3, the anchor bolts 18, the connecting members 5, and the mounting members 4 are omitted. As shown in Figure 3, the fan 2b is a device that is installed inside the housing 2a and generates an air flow that flows into the housing 2a from the intake port 2f and flows out from the exhaust port 2g. The fan 2b has a fan casing 2i, a motor 2j, and blades 2k.

The bottom surface of the fan casing 2i facing the room is formed with an intake port 2m that draws in air that has flowed into the housing 2a from the intake port 2f. The side surface of the fan casing 2i is formed with an outlet port 2n that allows air inside the fan casing 2i to flow out toward the exhaust port 2g. The fan 2b is installed with the intake port 2m facing the intake port 2f and the outlet port 2n facing the exhaust port 2g. The fan casing 2i is fixed to the top surface 2c of the housing 2a with screws (not shown). As shown in FIG. 2, the spring fixing part 2o is attached to the bottom surface of the fan casing 2i facing the room with screws or latches (not shown).

The motor 2j shown in FIG. 3 rotates the blades 2k. The motor 2j is fixed to the top surface 2c of the housing 2a. The blades 2k are disposed inside the fan casing 2i. The blades 2k are attached to the shaft 2p of the motor 2j.

The duct connection member 3 is a member that is detachably attached to the side surface 2d of the housing 2a so as to communicate with the exhaust port 2g, and to which the duct 14 is connected. As shown in FIG. 1, the duct connection member 3 has a vertical wall 3a and a connection portion 3b.

The vertical wall 3a is fixed to the mounting member 4 and extends upward from the mounting member 4. Although not specifically shown in the drawings, the vertical wall 3a is fixed to the mounting member 4 with screws or the like. The vertical wall 3a is parallel to the side surface 2d of the housing 2a. The connection portion 3b extends from the vertical wall 3a in a direction away from the ventilation fan main body 2.

The connection part 3b is a part to which the duct 14 is connected. The connection part 3b extends from the vertical wall 3a in a direction perpendicular to the vertical wall 3a. The connection part 3b is formed in a cylindrical shape. The shape of the connection part 3b is a shape in which a square tube part and a cylindrical part are connected from the intake side to the exhaust side. The outer shape of the cylindrical part of the connection part 3b is stepped with parts of different diameters. The diameter of the cylindrical part of the connection part 3b becomes smaller as it moves away from the ventilation fan main body 2. Since the outer shape of the cylindrical part of the connection part 3b is stepped with different diameters, multiple ducts 14 with different inner diameters can be selectively connected to the connection part 3b, and the work of wrapping tape to fix the duct 14 to the connection part 3b is made easier.

As shown in FIG. 3, the connection part 3b connects the exhaust port 2g of the housing 2a to the duct 14. The connection part 3b serves to extend the position where air is exhausted from the housing 2a to a position where it connects to the duct 14. Inside the connection part 3b, a shutter 7 that opens and closes with wind pressure is installed. The shutter 7 opens with wind pressure when the ventilation fan 1 is operating, and closes the inside of the connection part 3b with its own weight when the ventilation fan 1 is stopped. By installing the shutter 7 inside the connection part 3b, for example, if the duct 14 is connected to the outside of the room, it is possible to prevent outside air from entering the room through the duct 14 when the ventilation fan 1 is stopped.

The ventilation fan 1 is a device that draws in indoor air through the lattice portion 6a of the decorative grille 6 and the intake port 2f of the housing 2a, which will be described later, and exhausts the air to the outside or to another indoor space through the exhaust port 2g, the duct connection member 3, and the duct 14. When the duct 14 is connected to the outside of the room, the ventilation fan 1 functions as an exhaust ventilation fan that exhausts indoor air to the outside of the room, and when the duct 14 is connected to another indoor space, the ventilation fan 1 functions as a circulation ventilation fan that circulates air within the room. When the duct 14 is connected to the outside of the room, the duct 14 extends to the outside of the room and connects to a hood (not shown) attached to the exterior wall of the building, forming a ventilation air passage that ventilates the air inside the building.

Figure 4 is a view of the ventilation fan 1 according to the first embodiment as seen from the indoor side, with the decorative grill 6 shown in Figure 3 removed. As shown in Figure 4, an openable and closable terminal cover 10 is attached to the bottom surface of the fan casing 2i facing the indoor side. The terminal cover 10 has a cylindrical rotating shaft 10a. The fan casing 2i is provided with a support portion 2s that rotatably supports the rotating shaft 10a. The support portion 2s has a rotation hole into which the rotating shaft 10a is inserted. The terminal cover 10 rotates around the rotating shaft 10a.

In the space covered by the terminal cover 10, a power connection device 11 that is connected to an external power source (not shown) is arranged. The terminal cover 10 can be opened and closed. When the terminal cover 10 is closed, the terminal cover 10 covers the power connection device 11. The fan casing 2i is provided with a protective wall 2t that surrounds the terminal cover 10. When the terminal cover 10 is closed, the terminal cover 10 and the protective wall 2t can improve the airtightness of the space that houses the power connection device 11. On the other hand, when the terminal cover 10 is open, the power connection device 11 can be accessed, so that an external power cable (not shown) that connects the external power source and the power connection device 11 can be easily connected to the power connection device 11 from inside the room. As shown in FIG. 3, the surface of the terminal cover 10 facing the room is provided with a finger hook portion 10b on which an operator can hook his/her finger. This makes it easier to open the terminal cover 10. The power connection device 11 shown in FIG. 4 is isolated from the air passage by the terminal cover 10. This helps prevent dust, moisture, and other elements from entering the power connection device 11 through the air passage.

Figure 5 is a perspective view of the ventilation fan 1 in the first embodiment, seen from the ceiling space 21 side. In Figure 5, the anchor bolts 18, the connecting member 5, and the mounting member 4 are omitted. The motor wire 12 is wired along the top surface 2c of the housing 2a, and is drawn into the inside of the housing 2a, i.e., the part that houses the power connection device 11, through a bush 13 provided on the top surface 2c. The motor wire 12 electrically connects the motor 2j to the power connection device 11 shown in Figure 4. Power supplied from an external power source (not shown) is transmitted to the motor 2j via the power connection device 11 and the motor wire 12. Electric energy is converted into the rotational motion of the shaft 2p of the motor 2j shown in Figure 3, and the rotational motion of the motor 2j is transmitted to the blades 2k, causing the blades 2k to rotate. The rotation of the blades 2k generates an airflow from the intake port 2f toward the exhaust port 2g in the air passage formed by the fan casing 2i.

As shown in FIG. 2, the decorative grill 6 is arranged on the surface of the ceiling 20 facing the room so as to cover the installation hole 20a from below. The decorative grill 6 is a design part for hiding the internal parts such as the fan 2b from view from inside the room. This does not spoil the appearance of the ventilator 1 when viewed from inside the room. The decorative grill 6 has a lattice part 6a through which indoor air can pass, and a frame part 6b attached to the periphery of the lattice part 6a. As shown in FIG. 1, the decorative grill 6 further has a spring 6c. The decorative grill 6 is fixed to the fan casing 2i by hooking the spring 6c shown in FIG. 1 to the spring fixing part 2o attached to the fan casing 2i shown in FIG. 2.

As shown in FIG. 1, the mounting member 4 is a frame-shaped member that is arranged along the opening edge of the installation hole 20a and into which the ventilation fan main body 2 is inserted on the inner periphery side. In this embodiment, the shape of the mounting member 4 is a square frame. FIG. 6 is a vertical cross-sectional view showing the ventilation fan 1 according to the first embodiment, and shows the state in which the ventilation fan 1 is installed in the ceiling space 21 of the building. Note that in FIG. 6, the decorative grill 6 is omitted. As shown in FIG. 6, the mounting member 4 has a first flange portion 4a, a second flange portion 4b, a third flange portion 4c, and a cut-out portion 4d. The first flange portion 4a, the second flange portion 4b, the third flange portion 4c, and the cut-out portion 4d are arranged in this order from the outer periphery to the inner periphery of the mounting member 4. Hereinafter, the direction from the outer periphery to the inner periphery of the frame-shaped mounting member 4 is referred to as the inner periphery side of the mounting member 4, and the direction from the inner periphery to the outer periphery of the mounting member 4 is referred to as the outer periphery side of the mounting member 4.

The first flange portion 4a extends horizontally. The first flange portion 4a is in contact with the surface of the ceiling 20 that faces the interior of the room. The first flange portion 4a is parallel to the surface of the ceiling 20 that faces the interior of the room. The first flange portion 4a is hidden from view from the interior of the room by the decorative grill 6 shown in FIG. 3.

The second flange portion 4b extends upward from the inner peripheral end of the first flange portion 4a. The second flange portion 4b is perpendicular to the first flange portion 4a. The second flange portion 4b is in contact with the inner wall of the installation hole 20a. The second flange portion 4b is parallel to the inner wall of the installation hole 20a.

The third flange portion 4c extends horizontally from the upper end of the second flange portion 4b toward the inner periphery. The third flange portion 4c is perpendicular to the second flange portion 4b. The third flange portion 4c is parallel to the first flange portion 4a. The third flange portion 4c is disposed inside the installation hole 20a. The third flange portion 4c is disposed above and away from the mounting flange portion 2h.

Figure 7 is a cross-sectional perspective view of the ventilation fan 1 according to the first embodiment, showing the state in which the ventilation fan 1 is installed in the ceiling space 21 of a building. Figure 8 is a vertical cross-sectional view that shows the state in which the ventilation fan body 2, the mounting member 4, and the connecting member 5 according to the first embodiment are assembled. In Figure 8, for simplification, only a part of the ventilation fan body 2, a part of the mounting member 4, and a part of the connecting member 5 are enlarged and illustrated. As shown in Figure 7, the third flange portion 4c is superimposed on the mounting flange portion 2h. As shown in Figure 8, the third flange portion 4c has a fixing hole 4f formed therein. The mounting flange portion 2h has a fixing hole 2r formed therein. A fastening member 15 that fastens the mounting member 4 and the ventilation fan body 2 is inserted into the fixing hole 4f of the third flange portion 4c and the fixing hole 2r of the mounting flange portion 2h. The fastening member 15 is, for example, a screw.

Figure 9 is a perspective view of the anchor bolt 18, the connecting member 5, and the mounting member 4 in the first embodiment, viewed from the ceiling space 21 side. The cut-and-raised portion 4d extends upward from the end of the inner periphery of the third flange portion 4c. In other words, the inner periphery of the mounting member 4 is provided with the cut-and-raised portion 4d extending upward. The inner periphery of the mounting member 4 is a polygon having multiple sides 4h. In this embodiment, the inner periphery of the mounting member 4 is a rectangle having four sides 4h. In this embodiment, two cut-and-raised portions 4d are provided on each of the multiple sides 4h, but it is sufficient that at least one cut-and-raised portion 4d is provided.

As shown in FIG. 6, at least one of the multiple cut-and-raised portions 4d is provided below the connection portion 3b and is provided at a position that can contact the vertical wall 3a on the outer periphery side of the mounting member 4 relative to the vertical wall 3a. The cut-and-raised portion 4d that can contact the vertical wall 3a is disposed with a gap between it and the vertical wall 3a. The cut-and-raised portion 4d that can contact the vertical wall 3a contacts the vertical wall 3a when the duct connection member 3 is tilted toward the exhaust side, thereby suppressing the tilt of the duct connection member 3. The cut-and-raised portion 4d is inclined so as to approach the vertical wall 3a as it moves upward. The angle θ1 formed by the third flange portion 4c and the cut-and-raised portion 4d is an obtuse angle.

As shown in FIG. 9, the cut-out portion 4d is a portion that is fixed to the connecting member 5. FIG. 9 illustrates a state in which two of the eight cut-out portions 4d are fixed to the connecting member 5, but in reality, all of the cut-out portions 4d may be fixed to the connecting member 5. A fixing hole 4g is formed in the cut-out portion 4d. A fastening member 17 that fixes the mounting member 4 and the connecting member 5 is inserted into the fixing hole 4g and a fixing hole 5h of the connecting member 5 described below. The fastening member 17 is, for example, a screw.

The connecting member 5 is a metal member that connects the anchor bolt 18 suspended in the ceiling space 21 to the mounting member 4. The connecting member 5 is located on the outer periphery side of the mounting member 4 from the cut-and-raised portion 4d. The connecting member 5 is L-shaped. The connecting member 5 has a first wall 5a and a second wall 5b.

The first wall 5a extends upward from the inner peripheral edge of the mounting member 4. The first wall 5a is fixed to the side surface 2d of the housing 2a or the mounting member 4. In this embodiment, the first wall 5a is fixed to the cut-and-raised portion 4d of the mounting member 4 by a fastening member 17. The first wall 5a has an opening 5c through which the connecting hole 5i described below can be seen when the first wall 5a is viewed from the installation hole 20a. The opening 5c extends in the vertical direction. In this embodiment, the shape of the opening 5c is rectangular, but it may be another shape. The opening 5c is formed at a position where the anchor bolt 18 and the connecting hole 5i can be seen by the worker when inserting the anchor bolt 18 into the connecting hole 5i described below. The opening 5c is located above the vertical center of the first wall 5a.

When the line connecting the intersection O between the central axis A of the anchor bolt 18 and the second wall 5b and the center C of the opening on the indoor side of the installation hole 20a is defined as a virtual line L1, the virtual line L1 passes through the first wall 5a. The first wall 5a is located between the intersection O and the center C of the opening on the indoor side of the installation hole 20a. The position of the virtual line L1 that passes through the first wall 5a overlaps with the upper edge of the opening 5c. In other words, the virtual line L1 coincides with the upper edge of the opening 5c on the first wall 5a. Here, when the virtual line L1 rotated downward by 5° to 30° with the center C of the opening on the indoor side of the installation hole 20a as the base point is defined as a virtual line L2, the virtual line L2 passes through the first wall 5a. The position of the virtual line L2 that passes through the first wall 5a overlaps with the lower edge of the opening 5c. In other words, the virtual line L2 coincides with the lower edge of the opening 5c on the first wall 5a. The angle θ2 between the virtual lines L1 and L2 is 5° to 30°. The opening 5c is located between the virtual lines L1 and L2 in the vertical direction.

Figure 10 is a perspective view showing the connecting member 5 in embodiment 1. Figure 11 is a horizontal cross-sectional view showing the state in which the ventilator main body 2, the mounting member 4, and the connecting member 5 in embodiment 1 are assembled. For simplification, Figure 11 shows an enlarged view of only a portion of the ventilator main body 2, a portion of the mounting member 4, and a portion of the connecting member 5. As shown in Figures 10 and 11, the first wall 5a is provided with a narrowing portion 5d that protrudes toward the outer periphery of the mounting member 4. The narrowing portion 5d plays a role in ensuring the strength of the first wall 5a.

As shown in FIG. 10, the narrowing portion 5d is located below the center of the first wall 5a in the vertical direction. The narrowing portion 5d is provided below the opening 5c. The opening 5c and the narrowing portion 5d are spaced apart from each other in the vertical direction. The narrowing portion 5d is provided in a certain area extending from the lower end to the upper end of the first wall 5a.

Hereinafter, the direction parallel to the direction from the inner periphery side toward the outer periphery side of the mounting member 4 shown in FIG. 11 is referred to as the inward/outward direction. The direction perpendicular to the up-down direction and the inward/outward direction is referred to as the orthogonal direction. As shown in FIG. 11, the narrowed portion 5d has a bottom wall portion 5e extending along the orthogonal direction, and a pair of side wall portions 5f extending from both ends of the bottom wall portion 5e in the orthogonal direction toward the inner periphery side. Flat portions 5g are provided on both sides of the narrowed portion 5d in the orthogonal direction. The flat portions 5g extend from the inner periphery side ends of the side wall portions 5f in the orthogonal direction in a direction away from the bottom wall portion 5e. As shown in FIG. 10, a fixing hole 5h is formed in the lower portion of each flat portion 5g.

As shown in FIG. 9, the second wall 5b extends from the upper end of the first wall 5a in a direction away from the ventilator body 2. The second wall 5b extends from the upper end of the first wall 5a in a direction intersecting with the first wall 5a. The second wall 5b has a connecting hole 5i into which the anchor bolt 18 is inserted. The connecting hole 5i penetrates the second wall 5b in the vertical direction. The connecting hole 5i has an opening at a portion facing the opposite side to the first wall 5a. As shown in FIG. 10, the connecting hole 5i is cut in a U-shape from the tip of the second wall 5b toward the first wall 5a. A pair of arm portions 5j are formed on both sides of the second wall 5b sandwiching the connecting hole 5i. At the tips of the pair of arm portions 5j, a stopper portion 5k bent upward is formed.

As shown in FIG. 9, two nuts 19 are attached to each anchor bolt 18. The anchor bolt 18 is inserted into the connecting hole 5i from the radial direction of the anchor bolt 18, and the pair of arm portions 5j are sandwiched between the two nuts 19 by tightening the nuts 19, thereby fixing the connecting member 5 to the anchor bolt 18. When the anchor bolt 18 and the connecting member 5 move relatively in the horizontal direction, the stopper portion 5k contacts the upper nut 19 and serves to prevent the anchor bolt 18 from coming out of the connecting hole 5i. The stopper portion 5k may be bent downward from the tip of the arm portion 5j. In this configuration, the stopper portion 5k is capable of contacting the lower nut 19.

As shown in FIG. 8, the side surface 2d of the housing 2a facing the mounting member 4 is provided with an elastically deformable elastic member 8. For example, a leaf spring with an insertion hole 8a is used as the elastic member 8. It is preferable to perform burring on the leaf spring. The upper part of the elastic member 8 extends along the side surface 2d of the housing 2a. The upper part of the elastic member 8 is formed with an insertion hole 8a. The side surface 2d of the housing 2a is formed with an insertion hole 2q. The elastic member 8 is fixed to the housing 2a by inserting a fastening member 16 from the inside of the housing 2a into the insertion hole 2q of the housing 2a and the insertion hole 8a of the elastic member 8. The elastic member 8 is hooked onto the upper end of the cut-and-raised portion 4d when the ventilation fan main body 2 is inserted into the inner peripheral side of the mounting member 4 as described later. The elastic member 8 and the cut-and-raised portion 4d serve to temporarily fix the ventilation fan main body 2 to the mounting member 4.

The elastic member 8 extends obliquely downward toward the outer periphery of the mounting member 4. The lower end 8b of the elastic member 8 is located on the outer periphery side of the mounting member 4 relative to the cut-and-raised portion 4d. In other words, the cut-and-raised portion 4d is located on the inner periphery side of the mounting member 4 relative to the lower end 8b of the elastic member 8. As shown in FIG. 11, the lower end 8b of the elastic member 8 is disposed between a pair of side wall portions 5f in the orthogonal direction. In other words, the constriction portion 5d has a pair of side wall portions 5f disposed on either side of the lower end 8b of the elastic member 8 in the orthogonal direction. The pair of side wall portions 5f are disposed symmetrically with the lower end 8b of the elastic member 8 between them. The ventilation fan 1 has an opening region 9 surrounded by the constriction portion 5d and the cut-and-raised portion 4d. The dimension D1 of the opening region 9 along the inward and outward direction is greater than the dimension D2 of the lower end 8b of the elastic member 8 along the inward and outward direction.

Next, the installation method of the ventilation fan 1 according to the present embodiment will be described with reference to FIG. 9 and FIG. 12 to FIG. 19. FIG. 12 is a vertical cross-sectional view that shows a preparation step of the installation method of the ventilation fan 1 according to the first embodiment. FIG. 13 is a vertical cross-sectional view that shows an insertion step of the installation method of the ventilation fan 1 according to the first embodiment, and shows a state during insertion in which the elastic member 8 is in contact with the cut-and-raised portion 4d. FIG. 14 is a vertical cross-sectional view that shows an insertion step of the installation method of the ventilation fan 1 according to the first embodiment, and shows a state after insertion in which the elastic member 8 is located above the cut-and-raised portion 4d. FIG. 15 is a vertical cross-sectional view that shows a temporary fixing step of the installation method of the ventilation fan 1 according to the first embodiment. FIG. 16 is a horizontal cross-sectional view that shows a temporary fixing step of the installation method of the ventilation fan 1 according to the first embodiment. FIG. 17 is a vertical cross-sectional view that shows a main fixing step of the installation method of the ventilation fan 1 according to the first embodiment. FIG. 18 is a vertical cross-sectional view that shows a schematic of the first removal step of the installation method of the ventilation fan 1 according to the first embodiment. FIG. 19 is a vertical cross-sectional view that shows a schematic of the second removal step of the installation method of the ventilation fan 1 according to the first embodiment. For simplification, in FIG. 12 to FIG. 19, only a part of the ventilation fan body 2, a part of the mounting member 4, and a part of the connecting member 5 are shown enlarged.

First, we will explain the installation method of the ventilation fan 1 as a construction method for the ventilation fan 1. The installation method of the ventilation fan 1 includes a placement process, a connection process, a preparation process, an insertion process, a temporary fixing process, and a permanent fixing process.

As shown in FIG. 9, the placement process is a process of fixing the connecting member 5 to the anchor bolt 18 suspended from the ceiling space 21, and placing the connecting member 5 in the ceiling space 21. In the placement process, the anchor bolt 18 is inserted into the connecting hole 5i from the radial direction of the anchor bolt 18, and the nuts 19 are tightened to sandwich the pair of arm portions 5j between the two nuts 19. This fixes the connecting member 5 to the anchor bolt 18.

As shown in FIG. 9, the connecting step is a step of placing the mounting member 4 along the opening edge of the installation hole 20a and connecting the anchor bolt 18 and the mounting member 4 with the connecting member 5. In the connecting step, the connecting member 5 and the mounting member 4 are fixed to each other by inserting the fastening member 17 into the fixing hole 4g of the mounting member 4 and the fixing hole 5h of the connecting member 5, and the anchor bolt 18 and the mounting member 4 are connected to each other via the connecting member 5.

As shown in FIG. 12, the preparation process is a process of preparing the ventilator main body 2 below the mounting member 4. In the preparation process, since no external force is applied to the elastic member 8 of the mounting member 4, the lower end 8b of the elastic member 8 is located closer to the outer periphery of the mounting member 4 than the cut and raised portion 4d.

As shown in Fig. 13 and Fig. 14, the insertion process is a process of lifting the ventilation fan body 2 up to the ceiling 20, inserting it from below the mounting member 4 to the inner periphery of the mounting member 4, and inserting the ventilation fan body 2 into the inner periphery of the mounting member 4 until the lower end 8b of the elastic member 8 passes over the upper end 4e of the cut-and-raised portion 4d. As shown in Fig. 13, when the ventilation fan body 2 is inserted into the inner periphery of the mounting member 4, the lower end 8b of the elastic member 8 comes into contact with the cut-and-raised portion 4d, and the elastic member 8 is bent and elastically deformed so as to enter the inner periphery of the cut-and-raised portion 4d. As shown in Fig. 14, when the ventilation fan body 2 is further inserted into the inner periphery of the mounting member 4, the lower end 8b of the elastic member 8 passes over the upper end 4e of the cut-and-raised portion 4d, and the elastic member 8 returns to its original shape due to the elastic restoring force, and the lower end 8b of the elastic member 8 is located on the outer periphery of the mounting member 4 than the cut-and-raised portion 4d.

As shown in FIG. 15, the temporary fixing process is a process in which, after the insertion process, the ventilation fan body 2 is lowered and the elastic member 8 is hooked onto the upper end of the cut-and-raised portion 4d, and the ventilation fan body 2 is temporarily fixed to the mounting member 4. When the ventilation fan body 2 is lowered from the state shown in FIG. 14, the lower end 8b of the elastic member 8 is hooked onto the upper end 4e of the cut-and-raised portion 4d, as shown in FIG. 15, and the weight of the ventilation fan body 2 is supported by the cut-and-raised portion 4d via the elastic member 8. In this state, even if the worker releases his/her hand from the ventilation fan body 2, the ventilation fan body 2 does not lower any further, and the ventilation fan body 2 is temporarily fixed to the mounting member 4. In other words, in the temporary fixing process, there is no need to support the ventilation fan body 2 with his/her hand, and since he/she can release his/her hand from the ventilation fan body 2, he/she can prepare the fastening member 15 to be used in the next main fixing process. In the temporary fixing process, the lower end 8b of the elastic member 8 is sandwiched between the narrowing portion 5d and the cut-and-raised portion 4d. This makes it possible to suppress the inclination and rattling of the ventilation fan body 2. 16, in the temporary fixing process, the lower end 8b of the elastic member 8 contacts the bottom wall 5e of the narrowed portion 5d, and the pair of side walls 5f of the narrowed portion 5d are located on both sides of the lower end 8b of the elastic member 8 in the perpendicular direction. This prevents the elastic member 8 from shifting in the perpendicular direction, preventing the elastic member 8 from coming off the cut-and-raised portion 4d. Even if the elastic member 8 hooked on the cut-and-raised portion 4d shifts in the perpendicular direction, the side surface of the elastic member 8 contacts the side wall 5f, preventing the elastic member 8 from coming off the cut-and-raised portion 4d.

As shown in FIG. 17, the main fixing process is a process of fixing the ventilator fan body 2 to the mounting member 4 with the fastening member 15 after the temporary fixing process. In the main fixing process, the ventilator fan body 2 is lifted from the state shown in FIG. 16 and brought into close contact with the mounting member 4. In the main fixing process, the mounting flange portion 2h of the ventilator fan body 2 is brought into close contact with the third flange portion 4c of the mounting member 4, and the fastening member 15 is inserted into the fixing hole 2r of the ventilator fan body 2 and the fixing hole 4f of the mounting member 4, thereby fixing the ventilator fan body 2 and the mounting member 4 to each other.

Next, a method for removing the ventilation fan body 2 will be described as an installation method for the ventilation fan 1. When replacing the fan 2b due to a malfunction or defect in the fan 2b, it is necessary to remove the ventilation fan body 2 from the mounting member 4. The method for removing the ventilation fan body 2 includes a first removal step and a second removal step.

As shown in FIG. 18, the first removal step is a step of removing the fastening member 16 that fixes the elastic member 8 to the fan body 2. The dashed line in FIG. 18 shows the position where the fastening member 16 was located before removal. In the first removal step, the fastening member 16 is removed by inserting a hand through the air intake 2f of the housing 2a. When the fastening member 16 is rotated to remove it from the housing 2a of the fan body 2, the pair of side wall portions 5f of the narrowing portion 5d shown in FIG. 16 are located on both sides of the lower end portion 8b of the elastic member 8 in the perpendicular direction, so that the elastic member 8 is prevented from rotating when the fastening member 16 is removed. In other words, when the fastening member 16 is rotated, the side of the elastic member 8 comes into contact with the side wall portion 5f, thereby suppressing the rotation of the elastic member 8 relative to the fastening member 16. As shown in FIG. 18, when the fastening member 16 is removed, the elastic member 8 comes off the ventilation fan body 2 and falls so that the lower end 8b of the elastic member 8 is positioned between the cut and raised portion 4d and the narrowed portion 5d. This makes it possible to prevent the removed elastic member 8 from being lost.

As shown in FIG. 19, the second removal process is a process of removing the fastening member 15 and removing the ventilator body 2 from the mounting member 4 after the first removal process. When the ventilator body 2 is removed from the mounting member 4, the elastic member 8 is positioned between the cut-and-raised portion 4d and the narrowed portion 5d, so that the elastic member 8 can be prevented from being lost.

Next, we will explain the effects of the ventilation fan 1 according to this embodiment.

In this embodiment, as shown in FIG. 1, the duct connection member 3 has a vertical wall 3a fixed to the mounting member 4 and extending upward from the mounting member 4, and a connection portion 3b extending from the vertical wall 3a in a direction away from the ventilation fan main body 2 to which the duct 14 is connected. In this embodiment, as shown in FIG. 6, at least one cut-and-raised portion 4d extending upward is provided on the inner peripheral edge of the mounting member 4, and at least one cut-and-raised portion 4d is provided at a position that can contact the vertical wall 3a on the outer periphery side of the mounting member 4 more than the vertical wall 3a. With these configurations, when the duct connection member 3 is fixed to the mounting member 4, the duct connection member 3 is prevented from tilting toward the exhaust side as it moves upward and away from the center of the mounting member 4, and the ventilation fan main body 2 can be reliably attached to the duct connection member 3. Therefore, a shortage of the required ventilation air volume due to wind leakage from between the ventilation fan main body 2 and the duct connection member 3 is less likely to occur, and moisture leakage from between the ventilation fan main body 2 and the duct connection member 3 to the ceiling 20 is less likely to occur. In addition, there is no need to reattach the ventilator fan body 2 to the duct connection member 3.

In this embodiment, as shown in FIG. 6, the cut-and-raised portion 4d is inclined so that it approaches the vertical wall 3a as it goes upward. This further suppresses the inclination of the duct connection member 3, and allows the ventilator main body 2 to be securely attached to the duct connection member 3.

In this embodiment, as shown in FIG. 9, the inner peripheral shape of the mounting member 4 is a polygon having multiple sides 4h, and each of the multiple sides 4h is provided with at least one cut-out portion 4d. In this embodiment, the cut-out portion 4d is formed with a fixing hole 4g into which a fastening member 17 is inserted to fix the mounting member 4 and the connecting member 5. With this configuration, the mounting member 4 can be installed on the ceiling 20 with each side 4h of the mounting member 4 supported in a well-balanced manner by the anchor bolts 18.

The positional relationship between the mounting member 4 and the ceiling 20 shown in FIG. 6 may be changed as appropriate. For example, the mounting member 4 may be configured to be placed on the surface of the ceiling 20 facing the attic space 21. In such a configuration, the first flange portion 4a contacts the surface of the ceiling 20 facing the attic space 21. In addition, it is sufficient that at least one cut-out portion 4d is provided, and it is sufficient that at least one cut-out portion 4d is provided at a position that is closer to the outer periphery of the mounting member 4 than the vertical wall 3a and can contact the vertical wall 3a.

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

1 Ventilator, 2 Ventilator body, 2a Housing, 2b Fan, 2c Top surface, 2d Side surface, 2e Bottom surface, 2f Intake port, 2g Exhaust port, 2h Mounting flange portion, 2i Fan casing, 2j Motor, 2k Blade, 2m Intake port, 2n Outlet port, 2o Spring fixing part, 2p Shaft, 2q, 8a Insertion hole, 2r, 4f, 4g, 5h Fixing hole, 2s Support portion, 2t Protective wall, 3 Duct connecting member, 3a Vertical wall, 3b Connection portion, 4 Mounting member, 4a First flange portion, 4b Second flange portion, 4c Third flange portion, 4d Cut-out portion, 4e Upper end portion, 4h Side, 5 Connecting member, 5a First wall, 5b Second wall, 5c Opening, 5d Throttling portion, 5e Bottom wall portion, 5f Side wall portion, 5g flat portion, 5i connection hole, 5j arm portion, 5k stopper portion, 6 decorative grill, 6a lattice portion, 6b frame portion, 6c spring, 7 shutter, 8 elastic member, 8b lower end portion, 9 opening area, 10 terminal cover, 10a rotating shaft, 10b finger hook portion, 11 power connection device, 12 motor electric wire, 13 bush, 14 duct, 15, 16, 17 fastening member, 18 anchor bolt, 19 nut, 20 ceiling, 20a installation hole, 21 ceiling space.

Claims (2)

A ventilation fan that is installed on a ceiling using an installation hole formed in the ceiling,
A ventilation fan body including a box-shaped housing having an intake port for drawing in indoor air and an exhaust port for exhausting the drawn-in air on a side thereof, and a fan disposed inside the housing;
a duct connection 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 is disposed along an opening edge of the installation hole, and the ventilation fan main body is inserted into an inner peripheral side of the mounting member;
A connecting member that connects the mounting member to an anchor bolt suspended in a ceiling space formed above the ceiling;
Equipped with
The duct connection member has a vertical wall fixed to the mounting member and extending upward from the mounting member, and a connection portion extending from the vertical wall in a direction away from the ventilation fan main body and to which a duct is connected,
At least one raised portion extending upward is provided on an inner peripheral edge of the mounting member,
At least one of the cut-and-raised portions is provided at a position on the outer circumferential side of the mounting member relative to the vertical wall so as to be able to come into contact with the vertical wall ,
The cut-and-raised portion, which is provided at a position where it can come into contact with the vertical wall, is inclined so as to approach the vertical wall as it extends upward, and is not fixed to the connecting member . The inner periphery of the mounting member is a polygonal shape having a plurality of sides,
A plurality of the cut-and-raised portions are provided on an inner peripheral edge of the mounting member,
A part of the plurality of cut-and-raised portions is not fixed to the connecting member,
The remaining portions of the plurality of cut-and-raised portions are fixed to the connecting member,
The ventilation fan according to claim 1 , wherein each of the plurality of sides is provided with at least one cut-and-raised portion that is fixed to the connecting member.

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