JP2003322378A - Ventilating fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the labor required for operations while enhancing efficiency and reliability by ensuring that the quantity of air through a decorating frame part can be adjusted easily. <P>SOLUTION: A fan for forced ventilation is positioned at a ventilating duct which communicates the inside of a building to the outside and an air quantity adjusting plate 18 for adjusting the quantity of air is detachably mounted on the back of the decorating frame 16 provided at the indoor suction opening of the duct, by closing a portion of a ventilating opening 23 formed in the decorating frame. The air quantity adjusting plate 18 has an opening 34 therein which is in communication with a portion of the ventilating opening 23 in the decorating frame 16. The area over which the opening 23 is in communication varies depending on the selection of the side of the air quantity adjusting plate to be mounted to the decorating frame 16. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan provided, for example, on a ceiling of a building, and more particularly to a ventilation fan having an improved air volume adjusting structure that passes through a ventilation opening formed in a decorative frame provided at an intake port.

[0002]

2. Description of the Related Art Conventionally, as a ventilation fan for indoor ventilation of a building or the like, there has been known a ventilation fan and a fan provided on the ceiling side for forced ventilation to the outside. A decorative frame of an appropriate design suitable for a building is provided at the indoor intake port of such a ventilation fan, and the decorative frame is provided with a number of holes, ventilation openings such as slits, for example.

Since the desired air volume passing through the ventilation opening of the decorative frame differs depending on the indoor space and the like, a structure has been proposed which can be adjusted at the stage of installing the ventilation fan or thereafter as needed.

[0004] By the way, the structure often adopted in the prior art is detachably provided with an air volume adjusting plate for adjusting the air volume by closing a part of a ventilation opening formed on the back surface of the decorative frame. The attachment position of this air volume adjusting plate is moved on a flat surface by attachment and detachment, thereby adjusting the air volume balance (for example, JP-A-8-2).
54340, etc.).

In this case, as a conventional air volume adjusting plate, as described in the above publication, the air volume adjusting plate is on the back surface of the decorative frame and the same surface is on the back surface of the decorative frame in order to adjust the air volume. It was configured to be repositioned by shifting the position on the plane while still facing it. Further, in the above example, the air volume adjusting plate is composed of two pieces, and by moving both of them, the opening amount is expanded or reduced, thereby adjusting the air volume balance.

[0006]

However, in the above-mentioned prior art, the work is complicated because it requires two-step work such as attaching and detaching the air volume adjusting plate up and down to change the position in the lateral direction. In some cases, the efficiency may decrease, and in the work of moving the installation position laterally, it is difficult or erroneous to determine in which direction the movement is on the air volume increasing side or the air volume decreasing side. In some cases. Further, although the opening amount is adjusted according to the movement amount, it may be difficult to determine whether the opening is only slightly closed or the opening is largely closed. Further, when the air volume adjusting plate is composed of two or more pieces, only one piece may be reattached.

The present invention has been made in consideration of the above circumstances, and it is possible to reliably and easily adjust the air flow rate in a portion of the decorative frame by a simple work, thereby reducing the time and labor required for the work and improving the reliability. The purpose is to provide a ventilation fan.

[0008]

In order to achieve the above object, in the invention according to claim 1, a fan for forced ventilation is arranged in a ventilation duct communicating between the inside and outside of a building or the like, and the chamber of the duct is arranged. On the back surface of the decorative frame provided on the inner intake port, in the ventilation fan detachably attached with the air volume adjusting plate for adjusting the air volume by closing a part of the ventilation opening formed in the decorative frame, the air volume adjusting plate is A ventilation fan having an opening communicating with a part of a ventilation opening of the decorative frame and having a structure in which the area of communication of the opening differs depending on the selection of a surface to be attached to the decorative frame.

According to a second aspect of the present invention, the ventilation opening of the decorative frame and the opening of the air volume adjusting plate have a shape in which a plurality of slits and crosspieces are alternately arranged in parallel, and the slit of the decorative frame is formed. And the width of the crosspiece of the air volume adjusting plate is substantially the same, and the width of the crosspiece of the decorative frame is substantially the same as the width of the slit of the air volume adjusting plate. Provide a ventilation fan.

According to a third aspect of the present invention, the crosspiece of the surface of the air volume adjusting plate that closes the ventilation opening of the decorative frame is provided with a convex portion to be inserted into the slit of the decorative frame. An exhaust fan according to item 2 is provided.

In the invention according to claim 4, a pin is provided on the back surface of the decorative frame, a hole is provided at a position corresponding to the pin of the flow rate adjusting plate, and the pin is inserted into the hole to adjust the air volume. The plate is detachably fixed to the decorative frame, and the fixing position of the air volume adjusting plate by the hole and the pin is changed by selecting a surface to be attached to the decorative frame. The ventilating fan according to any one of 1.

According to a fifth aspect of the present invention, there is provided the ventilation fan according to the fourth aspect, wherein the pins are provided at four positions, and the four pins are set at diagonal positions of a trapezoid.

According to a sixth aspect of the present invention, at least one surface of the air flow rate adjusting plate is provided with a demonstrating means for clearly indicating the attached surface. Provide a ventilation fan.

According to a seventh aspect of the invention, there is provided the ventilation fan according to the sixth aspect, wherein the specifying means is integrally formed with the air volume adjusting plate.

8. The ventilation fan according to claim 7 or 8, characterized in that a clearing means for clearly showing a mounting surface of the air volume adjusting plate is provided at a position of the decorative frame which is opposite to the clearing means. .

According to a ninth aspect of the invention, there is provided the ventilating fan according to the eighth aspect, wherein the mounting surface indicating means provided on the decorative frame is integrally formed with the decorative frame.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a ventilation fan according to the present invention will be described below with reference to the drawings.

First Embodiment (FIGS. 1 to 9) FIG. 1 is an exploded perspective view showing a decorative frame and an air flow rate adjusting plate constituting an air flow rate adjusting device for a ventilation fan according to the first embodiment of the present invention, and FIG. It is the whole side view showing the whole exhaust fan structure as a partial section. 3 to 9 are explanatory views showing a decorative frame, an air volume adjusting plate, and an assembled state of these.

As shown in FIG. 2, the ventilation fan 1 of the present embodiment.
Is two adjacent rooms in the building, eg a bathroom 2
And the ceiling plate 4, 5 of the washroom 3 respectively, the intake port 6,
7 is provided, and these intake ports 6 and 7 are communicated with the exhaust port 11 of the outer wall 10 of the building by a common duct 9 arranged in the ceiling space 8. The opening area of the intake port 6 on the side of the bathroom 2 is formed to be relatively larger than that of the intake port 7 on the side of the washroom 3. An intake port 7 on the side of the washroom 3 is connected to the suction side end of the duct 9, and an intake port 6 on the side of the bathroom 2 is connected to an intermediate position of the duct 9. The duct 8 is provided with a ventilation fan main body 13 having a fan 12 for forced ventilation, and the ventilation fan main body 13 is arranged at the site of the intake port 6 of the bathroom 2.

Decorative frame mounting flanges 14 and 15 are horizontally provided along the ceiling plates 4 and 5 at the portions surrounding the intake ports 6 and 7 of the ceiling plates 4 and 5, respectively. Decorative frames 16 and 17 are brought into contact with 15 from the indoor side (from below), and are detachably attached and held by attachment fittings, spring members and the like (not shown).

Each of the decorative frames 16 and 17 has a rectangular shape or any other shape, and is provided on the side of the bathroom 2 and the washroom 3
The one on the side has, for example, similar rectangular shapes different in size. In the following example, the decorative frame 16 provided in the intake port 7 of the bathroom 2 and the decorative frame 1 are typically used.
Although the air volume adjusting device configured by the air volume adjusting plate attached to 6 will be described, the same can be applied to the decorative frame 17 on the side of the washroom 3.

FIG. 1 shows the decorative frame 16 in a horizontal arrangement which is an installed state, and shows a state in which an air volume adjusting plate 18 is horizontally arranged on the back side, that is, the upper surface side of the decorative frame 16. FIG. 3 is a plan view of the decorative frame 16 shown in FIG. 1 viewed from the back side, and FIGS. 4 and 5 show two surfaces in the plate thickness direction of the air volume adjusting plate 18 as the A surface and the B surface, respectively. It is a top view shown.

Further, FIG. 6 is a plan view showing a state in which the air volume adjusting plate 18 is attached to the rear surface of the decorative frame 16 so that one surface (A surface) is the upper side, and FIG. Figure 6
2 is a vertical cross-sectional view taken along the line AA of FIG. Further, in FIG. 8, the air volume adjusting plate 18 is provided on the back surface side of the decorative frame 16 and the other surface (B surface).
FIG. 9 is a plan view showing a state of being attached to the decorative frame 16 in an arrangement in which is the upper side, and FIG. 9 is a vertical cross-sectional view taken along the line BB of FIG. 8.

First, the structure of the decorative frame 16 will be described with reference to FIGS. 1, 3 and 7. As shown in these figures, the decorative frame 16 is a flat dish-like shape having a square shape in a plan view, and is integrally molded of resin. The decorative frame 16 is roughly classified into a rectangular main plate portion 19 having an area that covers the entire opening surface of the intake port 6 of the duct 9 that opens to the indoor side from the lower side, and the main plate portion 19.
It is composed of a peripheral frame portion 20 having a constant height, which is gently curved upward from the periphery of the peripheral body and rises substantially vertically, and the upper edge of the peripheral frame portion 20 abuts the flange of the intake port. .

The main plate portion 19 of the decorative frame 16 has a central flat plate portion 21 which occupies a square area within a certain range in the central portion thereof.
Although not shown, the central flat plate portion 21 has a spring member hanging from the center position of the intake port of the duct and the decorative frame 1
A mounting bracket for detachably locking the central portion of 6 is provided.

Around the central flat plate portion 21, there is formed a ventilation portion 22 which occupies a square-shaped frame-shaped region extending from the center side toward the periphery. The ventilation part 22 has a large number of parallel slits 23 as ventilation openings.
The portion between the three and the slit 23 is configured as a crosspiece 24. The slits 23 and the crosspieces 24 as these ventilation openings
All have a long and slender shape whose length direction extends in one direction, and these slits 23 and crosspieces 24
Are alternately arranged in parallel in the width direction at a constant pitch. For example, in the decorative frame 16 shown in FIGS. 1 and 3, the slits 23 that are long in the vertical direction are arranged adjacent to each other in the horizontal direction. This illustrated makeup frame 1
Slits 23 and crosspieces 24 are formed at positions facing each other across the central flat plate portion 21 in one direction a (see below, this direction is referred to as the “longitudinal direction a”) facing up and down. In addition, the other direction b shown in the lateral direction in FIGS.
Also in (hereinafter, this direction is referred to as “lateral direction b”), a plurality of slits 23 and crosspieces 24 (for example, 5 or more) are arranged. Each of the crosspieces 24 has a structure in which vertical plates having a constant vertical width are combined in a horizontal lattice pattern as shown in FIG. 7, for example.

Further, in the vertical direction a around the ventilation part 22.
At the peripheral position of the bottom wall 27, there is provided a rising wall 28 and an outer periphery from the rising wall 28 at a peripheral position of the lower wall 27 by a downwardly extending inclined wall 25 and a wall 26 vertically hanging down in the lateral direction b. Reinforcing frame portion 29 having a constant width and forming a rib shape having a substantially inverted U-shaped cross section that extends downward after extending to the side
Are formed. The outermost peripheral frame portion 20 described above is continuously provided on the outer edge of the reinforcing frame portion and stands up.

On the back surface (upper surface) of the decorative frame 16, a plurality of pins 30 are provided so as to project upward as means for fixing the air volume adjusting plate 18. These pins 30
For example, two pins are arranged on each of the downward inclined walls extending from the ventilation part 22 in the vertical direction a, and the distance between the pair of pins 30a and 30b arranged on the upper side of FIGS. 1 and 3 is set to be wide. The distance between the other pair of pins 30c and 30d arranged on the lower side of FIGS. 1 and 3 is set to be narrower than the distance between the pins 30a and 30b. As a result, the four pins 30 are respectively arranged at diagonal positions of a trapezoid that is supposed in a plan view.

In addition, on each of the inner sides of the reinforcing frame portion facing each other, for example, two recesses 3 are formed in the outer side of the frame in plan view.
1 is formed. These recesses secure a space for facilitating manual work at the time of attaching and detaching the wind direction adjusting plate, which will be described later.

Further, each of the inner sides of the reinforcing frame portion facing each other is provided with a convex piece portion 32 adjacent to the concave portion and projecting toward the center side of the decorative frame 16. With these convex pieces, the outer peripheral edges of the wind direction adjusting plate to be attached to the decorative frame 16 come into contact with each other, thereby facilitating the positioning to the position to be attached, and restricting the periphery of the air volume adjusting plate 18 to prevent excess. It is also designed to prevent movement.

Furthermore, the decorative frame 16 is provided with a specifying means 33 for clearly indicating the direction of the mounting surface of the air volume adjusting plate 18. This indicating means is provided at a position corresponding to the indicating means for clearly indicating the plate surface of the air volume adjusting plate 18, which will be described later, and is formed by integrally molding, for example, uneven characters or symbols as a relief or a recess with the decorative frame 16. Has been done.

Next, the air volume adjusting plate 18 will be described.
The expressions "vertical direction a" and "horizontal direction b" are also used for the air volume adjusting plate 18.

As shown in FIG. 1, FIG. 4, FIG. 5, FIG. 7, etc., the air volume adjusting plate 18 of this embodiment is a flat plate having a square frame shape with a large opening at the center, and is made of, for example, resin. It is molded. The wall thickness of the air volume adjusting plate 18 is constant as a whole, and regarding the contour, the length dimension of each side is larger than the length dimension of each side of the ventilation portion 22 of the decorative frame 16, and It is formed to be smaller than the length dimension of each side of the reinforcing frame portion.

The air volume adjusting plate 18 is formed with air volume adjusting openings 34 penetrating along the plate thickness direction. These openings 34 are provided in the slits 23 and the crosspieces of the decorative frame 16. Slit 35 and crosspiece 36 corresponding to 24
It consists of That is, the slit 2 of the decorative frame 16
The width of 3 and the width of the crosspiece of the air volume adjusting plate 18 are almost the same,
Moreover, the width of the crosspiece 24 of the decorative frame 16 and the width of the slit 35 of the air volume adjusting plate 18 are substantially the same. Then, the plurality of slits 35 and the crosspieces 36 are arranged alternately in parallel with the slits 23 and the crosspieces 24 of the decorative frame 16 in the width direction thereof, whereby,
It is designed to adjust the air volume.

The slits 35 and the crosspieces 36 are formed in one row along the circumferential direction, and are arranged corresponding to the slits 23 and the crosspieces 24 formed as the outer row of the decorative frame 16, for example. There is. That is, in the “longitudinal direction a” of the air volume adjusting plate 18, the slits 35 and the crosspieces 36 having a short length correspond to those of the two rows of the slits 23 and the crosspieces 24 of the decorative frame 16 which are arranged outside. Has been formed.

Further, the air volume adjusting plate 18 is provided with four holes 37 at positions corresponding to the pins 30 of the decorative frame 16 for inserting the pins 30 therethrough. Similar to the arrangement of the pins 30, these four holes 37 are arranged at diagonal positions of a trapezoid that is assumed in a plan view, and the pins 30 of the decorative frame 16 are inserted into the holes 37 of the air volume adjusting plate 18. By doing so, the air volume adjusting plate 18 can be detachably fixed to the decorative frame 16. In addition, these holes 37
Are bored in thin-walled portions that are partially formed in the air volume adjusting plate 18, respectively, so that the pin 30 can be inserted with a relatively small force.

The decorative frame 16 is attached to the air volume adjusting plate 18.
As shown in FIGS. 1, 4, and 5, corresponding to the demonstrating means 33, the clarifying means 38 for demonstrating the attachment surface to the decorative frame 16 is provided at one corner portion in the upper right corner, for example. The specifying means 38 is, for example, "A-side" or "B-side". When the "A-side" is on the upper side, the air volume is increased, and when the "B-side" is on the upper side, the air volume is reduced. Represents a function that is explicitly stated as follows. Also, these specifying means 33, 3
8 is displayed as a character in a predetermined direction on the upper right corner of the air volume adjusting plate 18, for example, the pin 30
In addition to the trapezoidal arrangement of the holes and the orientation of the letters, the orientation in which the air volume adjusting plate 18 should be attached can be easily determined. The air volume adjusting plate 18
The plate surface demonstrating means 38 is also configured by integrally molding with the decorative frame 16 as embossed or recessed concave and convex characters or symbols, for example.

With such a structure, the air volume adjusting plate 18
According to the setting of the positional relationship between the pin 30 and the hole 37, the fixing position of the air volume adjusting plate 18 by the pin 30 and the hole is changed by selecting the surface to be attached to the decorative frame 16. That is, as shown in FIG.
The positions of the pair of pins 30a and 30c along the vertical direction a are displaced in the width direction of the slit 23 and the crosspiece 24 in the horizontal direction b. For example, the pin 30a shown on the upper right side and the pin 3 shown on the lower left side in FIG.
The positions of 0d in the lateral direction b are respectively the slits 35
3 are arranged at the center position in the width direction, the positions of the pin 30b shown on the upper left side and the pin 30c shown on the lower right side in FIG. (And a position displaced from the slit 35)
It is located in.

On the other hand, the holes 37 of the air volume adjusting plate 18 are in the same arrangement as the pins 30 of the decorative plate of FIG. 3 when viewed from one surface (A surface), as shown in FIG. However, when the air volume adjusting plate 18 is turned upside down and viewed from the other side (B side), the holes 37b shown on the upper right side and the lower left side are shown in reverse to the above as shown in FIG. Lateral direction b of hole 37c
The positions of the slit 35 and the slit 35 are
And a hole 37a shown on the upper left side and a hole 37d shown on the lower right side.
The position in the horizontal direction b changes to the position of the slit 35.

Therefore, the air volume adjusting plate 18 is mounted on the back surface side of the decorative frame 16 with the A surface side facing upward, and the pin 30 of the decorative frame 16 is inserted into the hole 37 of the air volume adjusting plate 18 to insert the air volume adjusting plate. When 18 is fixed, as shown in FIGS. 6 and 7, a state in which the slits 23 and 35 of the air volume adjusting plate 18 and the decorative plate communicate with each other (a state in which the crosspieces overlap each other).
Therefore, the opening amount of the ventilation opening of the decorative frame 16 is the slit 2
The air flow rate during ventilation is set to a large value corresponding to 3, 35.

On the other hand, the air volume adjusting plate 18 is mounted on the back side of the decorative frame 16 with the B side facing upward, and the air volume adjusting plate 18 is mounted.
Insert the pin 30 of the decorative frame 16 into the hole of the air flow rate adjusting plate 18
8 is fixed, the slits 23 and 35 of the air volume adjusting plate 18 and the decorative plate are fixed as shown in FIG. 8 and FIG.
Are staggered, and the crosspieces of the air volume adjusting plate 18 close the slits 23 of the decorative frame 16. Therefore, in this case, the crosspiece 24 and the crosspiece 36 are in a state of mutually blocking the slits 23, 35 on the other side, so that the portion of the ventilation opening of the decorative frame 16 that overlaps with the air volume adjusting plate 18, that is, the inside and outside 2 Of the slits 23 arranged in rows, the slits 23 arranged outside are closed and the opening amount is reduced, so that the air volume during ventilation is set small.

As described above, according to the present embodiment, the area in which the openings 34 communicate with each other differs depending on the selection of the mounting surface of the air volume adjusting plate 18 to the decorative frame 16, so that the air volume adjusting plate 18 is installed. The amount of ventilation can be changed by a very simple operation of changing the surface to be blown. Further, in the present embodiment, since the single air volume adjusting plate 18 is applied, the two-step work is unnecessary as compared with the prior art in which the air volume adjusting plate 18 is vertically attached and detached to change the position in the lateral direction. However, the work becomes easier and the efficiency can be improved.

Further, unlike the work of moving the installation position in the lateral direction, it is difficult and erroneous to determine in which direction the movement is the movement on the air volume increasing side or the air volume reducing side. In particular, the arrangement of the pin 30 and the hole 37 and the indicating means 33 can also be used to easily determine the mounting surface, the direction and orientation of the mounting surface, etc., and it is possible to reliably prevent erroneous recognition and the like. Can greatly improve the reliability.

In the above embodiment, the ventilation opening of the decorative frame 16 and the opening 34 of the air volume adjusting plate 18 are
The slit 23 of the decorative frame 16 has a shape in which a plurality of slits 23 and 35 and crosspieces 24 and 36 are alternately arranged in parallel.
And the width of the crosspiece of the air volume adjusting plate 18 are substantially the same, and the width of the crosspiece 24 of the decorative frame 16 and the slit 3 of the air volume adjusting plate 18 are made the same.
The air volume is adjusted by making the width of the slits 5 substantially the same.
It is also possible to make changes and applications, such as implementing the openings 34 of various shapes such as triangles having different left and right widths.

If the indicating means is made by resin integral molding and integral molding such as engraving, not only a separate piece such as a seal is not required, but also peeling off occurs when cleaning is performed during cleaning. There are advantages such as not having to do it.

Second Embodiment (FIGS. 10 to 16) FIG. 10 is an enlarged perspective view showing a part of an air volume adjusting plate 18 according to the second embodiment of the present invention, and FIG. 11 is an air volume adjusting plate 18 thereof. It is a top view which shows the whole. 12, 13 and 14 are cross-sectional views taken along the lines CC, DD and EE of FIG. 11, respectively. 15 and 16
FIG. 6 is a cross-sectional view showing a state in which the air volume adjusting plate of the present embodiment is attached to the decorative frame 16 with its attachment surface changed.

The ventilation fan of this embodiment, as shown in FIGS. 10 to 16, has an air volume adjusting plate 1 for closing the ventilation opening of the decorative frame 16.
The protruding portion 3 protruding to the front surface side in one plate thickness direction so as to be fitted and inserted into the slit 23 of the decorative frame 16 in the crosspiece 36 of 8.
9 is provided.

As shown in FIG. 10, for example, these protrusions 39 are thicker than the peripheral portion and the inner side portion with the portions which become the crosspieces 36 adjacent to each other in the width direction of each slit 35 being overlaid. Is set to a large value and is resin-molded. As a result, as shown in FIGS. 10 to 14, the peripheral portion and the inner side of the air volume adjusting plate 18 are thin as in the first embodiment. Further, the corners on the outer peripheral side of each convex portion 39 are inclined surfaces, and the convex portion is the slit 2 of the decorative frame 16.
It is slightly shorter than 3 so that it can be easily inserted into the slit. The arrangement of the pin 30 and the hole 37 for attaching the air volume adjusting plate 18 and other configurations are the same as in the first embodiment.

On the surface provided with the convex portion 39, "A
"B" is applied to the surface having no convex portion 39 by applying the "face" specifying means 33.
The surface is given. Thereby, as in the first embodiment,
When the "A-side" is facing upward, as shown in FIG. 15, the convex portion 39 is displaced from the slit 23 of the decorative frame 16 at a position where the convex portion 39 overlaps with the crosspiece of the decorative frame 16 so that the air volume increases. I am doing it.

On the contrary, when the "B side" is directed upward, as shown in FIG. 16, the convex portion faces the lower side of the decorative frame 16 and is fitted into the slit 23 between the crosspieces 24. It is inserted so that the air volume is reduced.

Therefore, according to this embodiment, in addition to the effect of the first embodiment, when the air volume is set to be reduced, the convex portion 39 of the crosspiece 36 is fitted and inserted into the slit 23. As shown in FIG. 16, the ventilation opening is completely closed, and the flow rate can be effectively reduced. In particular, even when the air volume adjusting plate is warped, it is possible to obtain an advantage that the closing is surely performed.

[0052]

As described above, according to the present invention, it is possible to surely adjust the air volume in the part of the decorative frame by a simple operation,
It is possible to achieve the effects of reducing the labor required for work, improving efficiency, and improving reliability.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a decorative frame and an air volume adjusting plate which constitute an air volume adjusting device for a ventilation fan according to a first embodiment of the present invention.

FIG. 2 is an overall side view showing the entire structure of the ventilation fan in the embodiment as a partial cross section.

FIG. 3 is an explanatory view showing a decorative frame, an air volume adjusting plate, and an assembled state of these in the embodiment.

FIG. 4 is a plan view showing one surface in the plate thickness direction of the air volume adjusting plate of the embodiment as an A surface.

FIG. 5 is a plan view showing the other surface in the plate thickness direction of the air volume adjusting plate of the embodiment as a B surface.

FIG. 6 is a plan view showing a state of being attached to a decorative frame in a layout in which the surface A is the upper side in the embodiment.

7 is a vertical cross-sectional view taken along the line AA of FIG.

FIG. 8 is a plan view showing a state in which an air flow rate adjusting plate is attached to the decorative frame in the arrangement in which the B side is the upper side on the rear surface side of the decorative frame in the embodiment.

9 is a vertical cross-sectional view taken along the line BB of FIG.

FIG. 10 is an enlarged perspective view showing a part of an air volume adjusting plate according to a second embodiment of the present invention.

FIG. 11 is a plan view showing an entire air flow rate adjusting plate according to the second embodiment.

FIG. 12 is a sectional view taken along line CC of FIG.

13 is a cross-sectional view taken along line DD of FIG.

14 is a cross-sectional view taken along the line EE of FIG.

FIG. 15 is a cross-sectional view showing an example of a usage state of the second embodiment.

FIG. 16 is a cross-sectional view showing another example of the usage state of the second embodiment.

[Explanation of symbols]

1 ventilation fan 2 bathrooms 3 washroom 4,5 ceiling plate 6,7 Intake port 8 above the ceiling 9 ducts 10 building outer wall 11 exhaust port 12 fans 13 Ventilation fan body 14,15 flange 16,17 makeup frame 18 Air volume adjustment plate 19 Main plate 20 perimeter frame 21 Central flat plate 22 Ventilation section 23 slits 24 crosses 25 inclined wall 26 Hanging Wall 27 Bottom wall 28 Rising wall 29 Reinforcing frame part 30 pin 31 recess 32 convex piece 33 Explicit means 34 opening 35 slits 36 crosses 37 holes 38 Explicit means 39 convex

Claims (9)

[Claims] 1. A forced ventilation fan is arranged in a ventilation duct that communicates indoors and outdoors such as a building, and is formed on the decorative frame on the back surface of the decorative frame provided at the air intake port on the indoor side of the duct. In a ventilation fan detachably attached with an air volume adjusting plate for adjusting the air volume by closing a part of the ventilation opening, the air volume adjusting plate has an opening communicating with a part of the ventilation opening of the decorative frame, and A ventilating fan characterized in that the area of communication of the opening differs depending on the selection of the surface to be attached to the decorative frame. 2. The ventilation opening of the decorative frame and the opening of the air volume adjusting plate have a shape in which a plurality of slits and crosspieces are alternately arranged in parallel, and the width of the slit of the decorative frame and the air volume adjustment. 2. The ventilation fan according to claim 1, wherein the width of the rail of the plate is substantially the same, and the width of the rail of the decorative frame is substantially the same as the width of the slit of the air volume adjusting plate. 3. The ventilation fan according to claim 2, wherein a protrusion that is inserted into a slit of the decorative frame is provided on a crosspiece of a surface of the air volume adjusting plate that closes a ventilation opening of the decorative frame. 4. A pin is provided on the back surface of the decorative frame, a hole is provided at a position corresponding to the pin of the flow rate adjusting plate, and the air volume adjusting plate is attached to the decorative frame by inserting the pin into the hole. The fixing position of the air volume adjusting plate by the hole and the pin is changed by detachably fixing the surface to be attached to the decorative frame, and the fixing position is changed. Ventilation fan. 5. The ventilation fan according to claim 4, wherein the pins are provided at four positions, and the four pins are set in diagonal positions of a trapezoid. 6. The ventilating fan according to claim 1, wherein at least one surface of the air volume adjusting plate is provided with a specifying means for clearly indicating the attached surface. 7. The ventilation fan according to claim 6, wherein the specifying means is integrally formed with the air volume adjusting plate. 8. The ventilating fan according to claim 7, wherein a demonstrating means for demonstrating a mounting surface of the air volume adjusting plate is provided at a position of the decorative frame facing the demonstrating means. 9. The ventilation fan according to claim 8, wherein the mounting surface demonstrating means provided on the decorative frame is formed integrally with the decorative frame.