JP7702700B2 - How to install and replace a ventilation system - Google Patents

Description

The present invention relates to a method for installing or replacing a ventilation device that is embedded in an opening in a ceiling to ventilate a room.

Installation or replacement of such ventilation equipment had to be done after finishing the ceiling, such as by attaching a decorative sheet to the ceiling. This is because the entire lower edge of the ventilation equipment body extends outward parallel to the ceiling and into the decorative sheet outside the opening in the ceiling, and the decorative sheet on the underside of the ceiling fixes the extending part to the ceiling at multiple points, so the ventilation equipment had to be installed after finishing the ceiling.

Japanese Patent Application Publication No. 08-049898 JP 2010-164254 A JP 2010-164202 A JP 2010-117111 A JP 2009-186042 A

In that case, after the duct work in the attic was completed, the ceiling had to be finished, the duct had to be connected to the ventilation equipment, and then the ventilation equipment had to be installed. This meant that the installation work for the ventilation equipment had to be interrupted in the middle of the ventilation equipment work process to allow for finishing work on the ceiling, which was time-consuming and inefficient.

In order to solve the above problem, the ventilation device installation method of the present invention involves connecting the ventilation device body to a duct installed above the ceiling that communicates with the outdoors, and the entire lower edge of the ventilation device body faces downward toward the ceiling and does not extend to the side parallel to the ceiling, and fixing the lower edge side of the ventilation device body at multiple points to the inner surface of an opening provided in the ceiling, and installing the ventilation device body by embedding it in the opening.

In addition, in the ventilation device replacement method of the present invention, an old ventilation device body is installed above the ceiling and connected to a duct that communicates with the outdoors, and is embedded in an opening in the ceiling to ventilate the room. The old ventilation device body is connected to the duct with the entire lower edge of the old ventilation device body facing downward and not extending to the side parallel to the ceiling, and the new ventilation device body is attached to the opening where the old ventilation device body was attached. ...

As a result, the lower edge side of the ventilation device body is fixed to the inside surface of the opening, so the lower edge of the ventilation device does not protrude from the opening in the ceiling, and the ceiling can be finished after the ventilation device is installed in the ceiling opening or after the ventilation device has been replaced. Furthermore, the installation of the duct in the attic, the installation of the ventilation device, and the connection of the duct and the ventilation device can be carried out in the same ventilation device work process. And there is no longer a need to insert ceiling finishing work in the middle of these work processes, improving work efficiency.

1 shows a side cross-sectional view of the entire ventilation device 1 (new ventilation device main body 5). The lower part of the ventilation device main bodies 5 and 6 is shown. FIG. 2 shows a side cross-sectional view of the entire ventilation device 1 (old ventilation device body 6).

Reference Signs List 1: Ventilation device 2: Duct 3: Ceiling 4: Attic space 5: New ventilation device body 6: Old ventilation device body 7: Opening 8: Frame 9: Decorative sheet 11: Lower edge 12: Spacer 13: Long hole 15: Covering portion 16: Adapter 17: Extension portion 18: Screw

(1) Ventilation device 1
Figure 1 shows a side cross-sectional view of the new ventilation device body 5 of the entire ventilation device 1 (exhaust fan) of the present invention. A duct 2 is installed in the attic 4 above a horizontal, flat ceiling 3 and communicates with the outdoors. An adapter 16 of the ventilation device bodies 5 and 6 is connected to the duct 2.

In this connection, the cylinder of the adapter 16 is fitted into the cylinder of the duct 2, and adhesive tape or the like is wrapped around this connection part. The adapter 16 is shown as an elongated plate on the left side of the ventilation device main bodies 5 and 6 in Figure 1, and after the adapter 16 is attached to the frame 8 and the ceiling 3, the ventilation device main bodies 5 and 6 are slid from below and attached to the adapter 16 and combined, or slid downward to remove it from the adapter 16 and separate it.

A decorative sheet 9 is applied to the underside of the ceiling 3, and the ceiling 3 is finished. The new ventilation device main body 5 and the old ventilation device main body 6 (ventilation device main bodies 5, 6) are also installed in the attic 4, and are connected to and disconnected from the duct 2 via this adapter 16.

The ventilation device main bodies 5, 6 are embedded in an opening 7 provided in the ceiling 3, and ventilate the room. A frame body 8 is provided horizontally in the attic 4, and the ceiling 3 is fixed to and supported on its underside. The ceiling 3 and the frame body 8 may be integrated, or the frame body 8 may be omitted and included in the ceiling 3. The entire periphery or a part of the periphery of the opening 7, the vicinity of the opening 7, and the rest of the ceiling 3 other than the opening 7 are joined to and fixed on the underside of the frame body 8 for support.

The ends of this frame 8 are fixed to walls, pillars, etc. inside the room, or are connected to hanging devices at multiple points on the frame 8, and this hanging device is fixed to the underside of the structural frame above the attic 4, the underside of the roof, etc., so that the ceiling 3 is suspended, fixed, and supported. The ceiling 3 is plate-like and spreads throughout the room, and the frame 8 has a rectangular cross section such as a square or rectangle, or some other shape, and is long and rod-like overall.

The entire lower edge 11 of the lower end of the casing or frame of the new ventilator body 5 (old ventilator body 6) is made of resin, metal, etc., faces downward and perpendicular to the surface of the ceiling 3, and does not extend to the side parallel to the ceiling 3. This entire lower edge 11 is greater than or approximately the same height as the thickness of the ceiling 3 and the frame body 8.

This entire lower edge 11 is rectangular, the opening 7 is also rectangular, and the horizontal dimensions of the entire lower edge 11 are approximately the same as or slightly smaller than the horizontal dimensions of the opening 7. Therefore, the ventilation device main body 5 (6) is inserted and embedded in the opening 7, and the ventilation device main body 5 (6) is attached and fixed. The old ventilation device main body 6 is removed from the opening 7, and a new ventilation device main body 5 is attached and fixed to the opening 7 where the old ventilation device main body 6 was attached.

The lower edges 11 of the ventilation device main body 5 (6) are all horizontal and straight. The ceiling 3 and the opening 7 are also horizontal and straight. This allows the lower edges 11 to fit slightly inside the opening 7, so that no part of the lower edges 11 protrudes or sticks out below the opening 7, allowing the ventilation device main body 5 (6) to be installed beautifully.

A plate-shaped spacer 12 is inserted between the inside surface of the opening 7 and the entire lower edge 11 of the ventilation device body 5 (6) to close the gap between the inside surface of the opening 7 and the entire lower edge 11 of the ventilation device body 5 (6) and prevent air from escaping.

The spacer 12 is made of a single or multiple pieces and the thickness is appropriately selected so that the gap is completely blocked. The spacer 12 is made of hard resin, soft resin, metal, ceramic, rubber, etc., and blocks ventilation between the room and the ceiling 4, maintains adhesion between the ceiling 3 and the ventilation device main body 5, and maintains airtightness.

Figure 2 shows the lower side of the ventilation device main body 5, 6. A number of vertically extending long holes 13 are formed at regular intervals on the lower edge 11 of the ventilation device main body 5 (6), and screws 18 are inserted through the long holes 13, then through the spacer 12, and the screws 18 are tightened to fix the opening 7 to the side of the frame 8 on the inside surface of the opening 7.

The diameter of the threads of the screws 18 is larger than the width of the long holes 13, and the ventilator body 5 (6) is fixed to the ceiling 3 by the screws 18. As a result, the ventilator body 5 (6) is embedded and fixed in the opening 7 provided in the ceiling 3, and ventilation of the room is performed. Note that in FIG. 2, the screws 18 are fastened in the middle of the long holes 13, not at the ends, but may be fastened at the ends of the upper edges of the long holes 13.

These long holes 13 allow the attachment position of the side of the lower edge 11 of the ventilation device main body 5 (6) to the side of the frame 8 to be adjusted up and down, and accordingly the connection direction/angle of the ventilation device main body 5 (6) to the duct 2 can be adjusted, eliminating air leaks during ventilation.

Figure 3 shows a side cross-sectional view of the old ventilation device body 6 of the entire ventilation device 1 (ventilation fan). The bottom edge 11 of the old ventilation device body 6 had the same shape as the bottom edge 11 of the new ventilation device body 5, but it usually has a different shape. In this case, the bottom edge 11 of the old ventilation device body 6 extends downward and vertically, then is bent outward in a direction parallel to the ceiling 3, and further extends outward to form an extension 17.

This extension 17 has multiple circular holes through which screws 18 are inserted and fixed to the underside of the ceiling 3 and the underside of the frame 8 outside the opening 7. The screws 18 are then loosened and removed, releasing the extension 17 from the underside of the frame 8 and the underside of the ceiling 3, and the old ventilation device main body 6 is removed.

The cover 15 is shown at the bottom of Figures 1 and 3. The cover 15 is detachably attached to the underside of the ventilation device main body 5, 6 inside the opening 7. This cover 15 is larger than the opening 7, covers the entire opening 7, and is breathable by being mesh-like or the like.

The cover 15 can be attached in various ways, such as with screws, springs, or magnets. The cover 15 covers the ventilation device main bodies 5 and 6. The cover 15 may be attached to the underside of the ventilation device main bodies 5 and 6, or to the ceiling 3 around the opening 7.

The ventilation device main bodies 5 and 6 have air blowing blades or fans for ventilation and a drive source such as a motor that rotates/drives these air blowing blades or fans. When these air blowing blades or fans are rotated by the drive source, air in the room below the ventilation device main bodies 5 and 6 is drawn in and exhausted to the outside through the duct 2, thereby ventilating the air in the room.

(2) Method of Installing the Ventilation Device 1 (New Ventilation Device Body 5) and Method of Replacing the Ventilation Device 1 (Ventilation Device Body 5, 6) The method of installing the ventilation device 1 (new ventilation device body 5) is as follows.
(A) First, an opening 7 is formed in the ceiling 3, a duct 2 is placed in the attic 4, wiring is connected to the new ventilation device main body 5, an adapter 16 is fixed to the frame 8 of this opening 7 and connected to the duct 2, the new ventilation device main body 5 is slid onto this adapter 16 to be combined with it, the new ventilation device main body 5 is fitted and embedded, spacers 12 are interposed and the lower edge 11 is secured with screws 18, and the ventilation device main body 5 is fixed and attached within the opening 7. Furthermore, the underside of the ceiling 3 is finished by attaching a decorative sheet 9 to the underside of the ceiling 3, etc.

Finally, the cover 15 is attached to the opening 7 in the ceiling 3, covering the opening 7. In this way, the finishing work on the ceiling 3 can be carried out after the installation work of the ventilation device main body 5 is completed, eliminating the need to insert the finishing work on the ceiling 3 in the middle of the installation work process of the ventilation device main body 5, improving work efficiency. Furthermore, since the installation of the cover 15 is a simple task, it can be carried out by the person finishing the ceiling 3, rather than the worker working on the ventilation device 1.

If, as in the case of the old ventilation device main body 6, the lower edge of the ventilation device main body 6 were to bend and extend under the decorative sheet 9 of the ceiling 3 and abut against the underside of the ceiling 3, it would be necessary to add finishing work on the ceiling 3 in the middle of the work process of installing the ventilation device main body 5, which would result in poor work efficiency. The ventilation device installation method of (A) eliminates this inconvenience.

The ventilation device 1 (ventilation device main body 5) can also be attached in the following manner.
(B) First, an opening 7 is formed in the ceiling 3, and a duct 2 is placed in the attic 4. Next, the underside of the ceiling 3 is finished by attaching a decorative sheet 9 to the underside of the ceiling 3, etc. Furthermore, wiring to the ventilator main body 5 is connected, an adapter 16 is fixed to the frame 8 of this opening 7 and connected to the duct 2, a new ventilator main body 5 is slid onto this adapter 16 and combined with it, the new ventilator main body 5 is fitted and embedded, spacers 12 are interposed, and the lower edge 11 is secured with screws 18, and the ventilator main body 5 is fixed and attached within the opening 7.

Finally, the cover 15 is attached to the opening 7 in the ceiling 3, covering the opening 7. In this way, finishing work on the ceiling 3 can be done in the middle of the installation work of the ventilation device main body 5. This new ventilation device installation method (B) is less efficient than the above method (A), but it can be said to be superior in that it allows you to "select" either method (A) or (B) as appropriate depending on the situation. With the old ventilation device main body 6, whose lower edge is bent and extended to abut against the underside of the ceiling 3, such a "selection" is not possible.

In this way, the above-mentioned (A) ventilation device 1 installation method and the above-mentioned (B) ventilation device 1 installation method can be selected according to the work situation or the site situation. The work situation or the site situation is the schedule of the worker specialized in the ventilation device 1, the procurement of parts for the ventilation device 1, the schedule of the worker specialized in the decorative sheet 9 of the ceiling 3, the procurement of materials for the decorative sheet 9, etc.

The method for replacing the ventilation device 1 (ventilation device main bodies 5, 6) is as follows.
(C) First, the cover part 15 is removed from the ceiling 3, the screws on the lower edge of the old ventilation device main body 6 are loosened and removed, the adapter 16 and the old ventilation device main body 6 are separated, and the old ventilation device main body 6 is pulled out from the opening 7 leaving the adapter 16 behind, and the old ventilation device main body 6 is removed.

Next, the wiring to the new ventilation device main body 5 is connected, the new ventilation device main body 5 is combined with the adapter 16 inside the opening 7, the new ventilation device main body 5 is fitted and embedded, the spacers 12 are placed between the new ventilation device main body 5 and the lower edge 11 is secured by screws 18, and the new ventilation device main body 5 is fixed and attached inside the opening 7. Furthermore, depending on the case, the decorative sheet 9 may be replaced on the underside of the ceiling 3, and the underside of the ceiling 3 may also be given a new finish.

Finally, the cover 15 is attached to the opening 7 in the ceiling 3, covering the opening 7. In this way, the finishing work on the ceiling 3 can be carried out after the replacement work of the ventilation device main bodies 5, 6 is completed, eliminating the need to perform finishing work on the ceiling 3 in the middle of the work process of replacing the ventilation device main bodies 5, 6, improving work efficiency. Furthermore, since the installation of the cover 15 is a simple task, it can be performed by the person finishing the ceiling 3, rather than the worker working on the ventilation device 1.

Here, the finishing work of replacing the decorative sheet 9 of the ceiling 3 may be omitted. Also, the finishing work of replacing the decorative sheet 9 of the ceiling 3 may be performed after the new ventilation device 5 is installed, after the old ventilation device 6 is removed, or after the original cover portion 15 is removed.

The fact that the user can "select" whether or not to perform the finishing work of replacing the decorative sheet 9 and the timing, i.e., whether to perform it after the new ventilation device 5 is installed, after the old ventilation device 6 is removed, or after the cover portion 15 is removed, depending on the progress of the work or the situation at the site, is an advantage in itself. With the old ventilation device main body 6, whose lower edge is bent and extended to abut against the underside of the ceiling 3, such a "selection" is not possible.

In this embodiment, the adapter 16 is excluded from the ventilation device main body 5, 6. However, it may be included. The lower edge of the adapter 16 faces downward toward the ceiling 3 and does not extend to the side parallel to the ceiling 3. However, the lower edge of the adapter 16 extends outward in a direction parallel to the ceiling 3, and this extension 17 may be fixed to the underside of the ceiling 3 or released and removed. Even in this case, it can be said that the entire lower edge 11... of the new ventilation device main body 5 excluding the adapter 16 faces downward toward the ceiling 3 and does not extend to the side parallel to the ceiling 3.

(3) Second embodiment The duct 2 may be bellows-shaped and expandable, and can be pulled out to below the opening 7 in the ceiling 3, and a new ventilation device main body 5 and an old ventilation device main body 6 (ventilation device main bodies 5, 6) are connected to or removed from the duct 2 near the bottom of the opening 7, and the ventilation device main bodies 5, 6 are attached or replaced. In this case, since the duct 2 is pull-out, the adapter 16 can be omitted, and the adapter 16 is combined with the ventilation device main bodies 5, 6, and the combined ventilation device main bodies 5, 6 are attached or replaced as a whole.

The tip of the duct 2 is now pulled out close to the opening 7, the new ventilation device main body 5 is connected to the duct 2, and the electrical wiring is then connected. The corners of the upper edge of the new ventilation device main body 5 do not protrude, so the new ventilation device main body 5 is pushed in at an angle and pushed through the opening 7. Then, this angle is straightened to a horizontal position, and the entire lower edge 11... of the new ventilation device main body 5 is screwed to the inside surface of the opening 7 in the ceiling 3, with spacers 12... in between without any gaps, and the new ventilation device main body 5 is fixed inside the opening 7 without any gaps.

When removing the old ventilation device main body 6, loosen the screws on the underside of the ceiling 3 around the opening 7 and remove it. Next, remove the spacers 12 to create a gap between the old ventilation device main body 6 and the ceiling 3 and frame 8, and tilt and pull out the old ventilation device main body 6 and remove it from the opening 7. Then, disconnect the old ventilation device main body 6 from the duct 2 and cut the electrical wiring. Note that the screws on the underside of the ceiling 3 may also penetrate all the way to the frame 8 above the ceiling 3.

(4) Other embodiments The present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the frame body 8 may be omitted or may be integrated with the ceiling 3. In this case, the ceiling 3 including the frame body 8 is the only one that supports the ceiling 3. In this case, the ceiling 3 may be thick, may not change in thickness, or may be thin. The ceiling 3 may be supported at its periphery by walls or pillars in the room, or may be supported by a hanging member such as a hanging bracket.

The spacers 12 may be omitted, and the ventilation device main bodies 5, 6 and adapter 16 may be fixed directly to the ceiling 3 and frame 8. In this case, there will be almost no gap between the ventilation device main bodies 5, 6 and the ceiling 3 and frame 8. Small gaps between the ventilation device main bodies 5, 6 and the ceiling 3 and frame 8 may be filled with putty, filler, adhesive, etc. Also, the part connected to the duct 2 in the upper left of Figure 1 will no longer protrude, and the ventilation device main bodies 5, 6 can be fitted into the opening 7 without tilting it, or pulled out and removed.

The adapter 16 may be omitted in part or in whole, and the joint surface between the adapter 16 and the ventilator main body 5, 6 may be vertically linear, or may be oblique, curved, or uneven. The cover portion 15 may be omitted in part or in whole.

The decorative sheet 9 may be omitted, and the underside of the ceiling 3 may be treated to have a wood grain pattern or other decorative sheet pattern, or may be painted. Filling material such as putty may be applied between the inner surface of the opening 7 in the ceiling 3, the side surface of the spacer 12, the outer surface of the ventilation device main body 5, etc., to further improve airtightness.

The ventilation device main body 5, 6 and the duct 2 may be cylindrical, elliptical, rectangular, prism-like, truncated cone-like, truncated pyramid-like, rectangular, cubic, or a combination of these shapes. Accordingly, the opening 7 may be circular, elliptical, rectangular, polygonal, etc. The frame 8 may be rectangular, prism-like, cylindrical, elliptical, rectangular, cubic, or a combination of these shapes.

The duct 2 and the ventilation device main bodies 5, 6 can be connected by any method that allows for a detachable connection, such as screwing, fitting, or magnetic adhesion. The lower end edges 11 of the ventilation device main bodies 5, 6 can be horizontal and straight, or can be uneven, can be oblique to the horizontal, or can be slightly exposed downward from the opening 7, as long as this does not interfere with the attachment of the cover part 15.

The lower edge 11 of the old ventilation device main body 6 faces downward toward the ceiling 3 and does not have to extend to the side parallel to the ceiling 3, and may have the same shape as the lower edge 11 of the new ventilation device main body 5. The lower edges of the long holes 13 may reach the lower edges 11 of the ventilation device main bodies 5, 6 and may be shaped like a recess/notch rather than a hole.

Above the attic 4, in addition to the roof, in multi-story buildings, etc., there is a structural frame/upper ceiling that separates the floor of the upper floor from the attic 4 of the lower floor. The attic 4 does not have to exist, and the underside of the structural frame can be the ceiling 3, with the ducts 2 running around the underside of the structural frame, and the ventilation device bodies 5, 6 attached to the underside of the structural frame.

The screws and long holes 13 are provided at regular intervals and fixed, but this can be said to fix the entire circumference of the ventilation device main body 5, 6 at regular intervals, and anything else can be used, such as bolts and nuts, screws, hook and loop fasteners, wire fasteners, stitching, adhesive, adhesive tape, hooks and fasteners, magnets, staples, buttons and buttonholes, string that can be tied and untied, etc., or they can be omitted, and the long holes 13... can be circular holes.

The frame 8 is provided around the entire circumference of the opening 7, but may be omitted in part or in whole, or the ceiling 3 itself may function as the frame 8. The opening 7 may be rectangular, circular, elliptical, polygonal, or other shape. The shape of the ventilation device main bodies 5, 6 is close to a cube, excluding any irregularities, but it may be flat along the opening 7, or may be a cylinder, elliptical cylinder, polygonal cylinder, disk, elliptical plate, polygonal plate, or other shape.

The ceiling 3 is planar and flat, but may have irregularities and may have holes or apertures. The duct 2 may be cylindrical, rectangular, polygonal, elliptical, or other shapes. The room may or may not have doors, windows, vents, etc., and may be an open room connected to the outside.

The ventilation device 1, duct 2, ceiling 3, attic space 4, new ventilation device main body 5, old ventilation device main body 6, opening 7, frame 8, decorative sheet 9, lower edge 11..., spacer 12..., long hole 13..., cover part 15, adapter 16, extension part 17, screw 18... may be singular, plural, or three or more, and each of these configurations, operations, actions, steps or functions may be omitted in part or in whole, or may be divided and separated to increase or decrease the number, their shapes may be arbitrarily changed, and they may be replaced with other equivalent objects, or two or more of these may be combined or integrated to be used in combination, and the orientation may be 90 degrees, 0 degrees or more than those shown in the figure. It may be used by tilting/changing its orientation/flipping 180 degrees, up and down, left and right, front and back, front and back, front and back, the relative sizes of each dimension may be switched or may be the same, some or all of them may be omitted, the shape may be flat, curved, have holes, may have irregularities, and may be shaped in any shape, including square, rectangular, triangular, circular, elliptical, polygonal, trapezoidal, semi-elliptical, parallelogram, rhombus, polygonal, triangular, trapezoidal, ring, semi-ring, star, sector, curved, cross, L-shaped, H-shaped, I-shaped, U-shaped, T-shaped, C-shaped, O-shaped, N-shaped, M-shaped, X-shaped, J-shaped, Y-shaped, E-shaped, F-shaped, S-shaped, V-shaped, or other shapes. The shape may be a flat shape, a curved surface, an angular shape, a rectangular parallelepiped shape, a polyhedron shape, a cylinder, a square tube, a circular cylinder, an elliptical cylinder, a rectangular cylinder, a semi-circular cylinder, a semi-elliptical cylinder, a semi-rectangular cylinder, a circular truncated cone, a truncated pyramid, a sphere, an egg shape, a hemisphere, a semi-egg shape, a polyhedron, a gourd shape, a sawtooth shape, a coil, a string, a plate, a rod, a block, or another three-dimensional shape, or a three-dimensional shape formed by combining these. The shape may be a shape with angular steps, a shape with rounded steps, a shape with rounded irregularities, a combination of these, a stepped shape, a net shape, a frame shape, a sheet shape, a mesh shape, a blind shape, a slit shape, a shape with many holes, a shape with a hole in the center of these, a composite combination of these, or the like, or may be omitted in part or in whole. The materials may be metal, wood, bamboo, hard urethane, soft urethane, soft resin, hard resin, foamed resin, resin, metal, glass, cotton, cloth, thread, fiber, rubber, paper, ceramic, carbon, clay, liquid or gas sealed objects, composites/mixtures/multi-layer laminates of these, or may be mesh-like, transparent, or translucent, and the connections, fastenings, bonding, adhesion, and joining between each of them may be anything, such as stitching, bolts and nuts, screws, hook and loop fasteners, wire fasteners, stitching, adhesive, adhesive tape, hooks and snaps, magnets, staples, buttons and buttonholes, strings for tying and untying, or may be omitted.

(5) Effects of Other Inventions [1] A method for installing a ventilation device, comprising: connecting a ventilation device main body to a duct that is installed in the attic and communicates with the outdoors; and having the entire lower edge of the ventilation device main body facing downward toward the ceiling and not extending to the side parallel to the ceiling; fixing the lower edge side of the ventilation device main body at multiple points to the inner surface of an opening provided in the ceiling; and embedding the ventilation device main body in the opening to install the ventilation device main body.

[2] The method for installing a ventilation device according to claim 1, characterized in that the attachment position of the lower edge side of the ventilation device body to the inner side of the opening can be adjusted up and down, and the connection direction of the ventilation device body to the duct can be adjusted accordingly. This allows the height of the ventilation device body to be adjusted according to the height of the ceiling.

[3] The method for installing a ventilation device according to claim 2, characterized in that a cover part that covers the entire opening and has breathability is attached to the opening in a removable manner. This makes it possible to cover and conceal the ventilation device body inside the opening without impairing breathability.

[4] The method for installing a ventilation device according to claim 3, characterized in that after the ventilation device is installed, the underside of the ceiling is finished, and then the cover is attached to the opening in the ceiling. This allows the ventilation device body to be installed before the ceiling is finished, and allows the installation work of the ventilation device body to be done in conjunction with other work related to the ventilation device.

[5] The method for installing a ventilation device according to claim 3, characterized in that the ventilation device is installed after the underside of the ceiling is finished, and then the cover is installed in the opening in the ceiling. This allows the selection of conventional work methods.

[6] A ventilation device installation method characterized in that the ventilation device installation method of claim 4 and the ventilation device installation method of claim 5 are selected according to the progress of work or the situation at the site. This allows the work process to be selected according to the progress of work or the situation at the site, and the work process to be changed according to the progress of work or the situation at the site.

[6-1] The method for installing a ventilation device according to claim 4 or 5, characterized in that the ventilation device body has a blower blade or fan for ventilation and a drive source for driving the blower blade or fan. This prevents the blower blade or fan and the drive source from colliding with anything.

[7] A method of replacing an old ventilation device body that is installed above the ceiling and connected to a duct that communicates with the outdoors, and that is embedded in an opening in the ceiling to ventilate the room, comprising the steps of: releasing the fixing of an extension portion that extends outward in a direction parallel to the ceiling at the lower edge of the old ventilation device body to the underside of the ceiling, disconnecting the old ventilation device body from the duct and removing the old ventilation device body; connecting a new ventilation device body to the duct; fixing the lower edge side of the new ventilation device body to the inner surface of the opening at multiple points; and attaching the new ventilation device body to the opening where the old ventilation device body was attached.

[8] The method for replacing a ventilation device according to claim 7, characterized in that the mounting position of the inner surface of the opening on the lower edge side of the new ventilation device body can be adjusted up and down, and the connection direction of the new ventilation device body to the duct can be adjusted accordingly. This allows the height of the ventilation device body to be adjusted according to the height of the ceiling.

[9] The ventilation device replacement method according to claim 8, characterized in that a cover part that covers the entire opening and has breathability is attached to the opening in a removable manner. This makes it possible to cover and conceal the ventilation device body inside the opening without impairing breathability.

[10] The ventilation device replacement method according to claim 9, characterized in that the cover part is removed, then the old ventilation device is removed, and then the new ventilation device is installed, and then the cover part is installed in the opening in the ceiling. This allows the old ventilation device to be replaced with a new ventilation device.

[11] The ventilation device replacement method according to claim 10, characterized in that the underside of the ceiling is finished after the new ventilation device is installed, after the old ventilation device is removed, or after the cover is removed. This allows the ceiling finish to be selected after various tasks, allowing for flexible response.

[12] The ventilation device replacement method according to claim 11, characterized in that the finishing of the underside of the ceiling is selected according to the progress of the work or the situation at the site, from among finishing after the new ventilation device is installed, finishing after the old ventilation device is removed, and finishing after the cover is removed. This allows the work process to be selected according to the progress of the work or the situation at the site, and the work process to be changed according to the progress of the work or the situation at the site.

[12-1] The ventilation device replacement method according to claim 10, 11 or 12, characterized in that the old ventilation device body or the new ventilation device body has a blower blade or fan for ventilation and a drive source for driving the blower blade or fan. This prevents the blower blade or fan and the drive source from colliding with anything.

This makes ventilation-related work more efficient by eliminating the need to perform ceiling finishing work in the middle of ventilation-related work. The entire bottom edge 11 of the ventilation device main body 5 faces downward toward the ceiling 3 and does not extend to the side parallel to the ceiling 3. When the ventilation device main body 5 is embedded and fixed in the opening 7 of the ceiling 3, the bottom edge 11 does not extend beyond the underside of the decorative sheet 9 attached to the underside of the ceiling 3.

Therefore, it is no longer necessary to perform work such as installing the ventilation device main body 5 after finishing the ceiling 3, such as by attaching the decorative sheet 9 to the ceiling 3. Therefore, the ventilation device main body 5 can be installed before finishing the ceiling 3, and there is no need to wait until the ceiling 3 is finished before installing the ventilation device main body 5. Work related to the ventilation device 1, such as forming the opening 7, placing the duct 2 in the attic 4, wiring the ventilation device main body 5, and connecting the duct 2 and the ventilation device main body 5, can be performed in conjunction with the installation work of the ventilation device 5, improving work efficiency.

Claims (4)

a ventilation device body is connected to a duct installed in the ceiling space and communicating with the outdoors, the entire lower edge of the ventilation device body faces downward toward the ceiling and does not extend to a side parallel to the ceiling, and the entire lower edge does not extend beyond the underside of the ceiling outside the entire periphery of an opening provided in the ceiling, the lower edge side of the ventilation device body is fixed at multiple points to the inner surface of the opening provided in the ceiling, and the ventilation device body is attached by embedding the ventilation device body in the opening,
a cover part which covers the entire opening and also covers the underside of the ceiling around the opening and has air permeability and is detachably attached to the opening;
After the ventilation device main body is installed, the underside of the ceiling is finished, and then the cover part is attached to the opening of the ceiling. After the underside of the ceiling is finished, the ventilation device main body is installed, and then the cover part is attached to the opening of the ceiling.
A method for installing a ventilation device, characterized in that a plurality of long holes extending perpendicularly to the opening surface of the opening are provided on the lower edge of the ventilation device main body, and the ventilation device main body is fixed to the inner surface of the opening by a fixing means through the long holes, thereby fixing the ventilation device main body within the opening. The method for installing a ventilation device according to claim 1, characterized in that a frame is provided at the opening, and the attachment position of the lower edge side of the ventilation device body to the side of the frame can be adjusted up and down, and the connection direction of the ventilation device body to the duct can be adjusted accordingly. An old ventilation device body that is installed in the ceiling space and connected to a duct that communicates with the outdoors, which is embedded in an opening in the ceiling and ventilates the room, is provided with a method of releasing the fixation of an extension portion that extends outward in a direction parallel to the ceiling at the lower end edge of the old ventilation device body to the underside of the ceiling, disconnecting the old ventilation device body from the duct and removing the old ventilation device body,
A new ventilation device body is connected to the duct, and the entire lower end edge of the new ventilation device body faces downward toward the ceiling, does not extend to a side parallel to the ceiling, and does not extend beyond the underside of the ceiling outside the periphery of the opening provided in the ceiling. The lower end side of the new ventilation device body is fixed to the inner surface of the opening at multiple points, and the new ventilation device body is attached to the opening where the old ventilation device body was attached.
a cover part which covers the entire opening and also covers the underside of the ceiling around the opening and has air permeability and is detachably attached to the opening;
After the new ventilation device body is installed, the underside of the ceiling is finished and then the cover part is attached to the opening in the ceiling, or after the underside of the ceiling is finished, the new ventilation device body is installed and then the cover part is attached to the opening in the ceiling,
A ventilation device replacement method characterized in that a plurality of long holes extending perpendicular to the opening surface of the opening are provided on the lower edge of the new ventilation device body, and the new ventilation device body is fixed to the inner surface of the opening by a fixing means through the long holes, thereby fixing the new ventilation device body within the opening. A ventilation device replacement method as described in claim 3, characterized in that a frame body is provided at the opening, and the mounting position of the side of the frame body on the lower edge side of the new ventilation device body can be adjusted up and down, and the connection direction of the new ventilation device body to the duct can be adjusted accordingly.

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