JP2912828B2 - Duct ventilation fan - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan for a duct used by being mounted on a ceiling.

[0002]

2. Description of the Related Art Heretofore, this type of duct ventilation fan has generally been configured as shown in Japanese Utility Model Laid-Open Publication No. 60-65540. Hereinafter, the configuration will be described with reference to FIG.

As shown in the figure, an upper wall 101 is a frame 1
The upper wall 10 is provided on the frame 102 so as to be detachable by a plurality of screws 104.
1 includes an electric motor 105, a blade 106, and a casing 10
7 is provided. The blower 108 is provided at the end 1 of the outlet 107 a of the casing 107.
10 is attached with a plurality of screws 104a so as to abut the exhaust port 109 on the inner surface of the frame 102.

On the outer surface of the frame 102 provided with the exhaust port 109, there is provided an adapter 113 having a cylindrical shape for connecting a duct 112 and having a wind pressure type shutter 111 therein.
Is provided so that the end 114 of the casing 107 abuts, and an exhaust path from the casing 107 to the adapter 113 is thus formed.

On the other hand, a louver 116 which covers the intake opening 103 and is provided with a plurality of vents 115 communicating with the intake opening 103 is provided at a lower portion of the frame 102.
It was provided detachably from the 17th side.

In the above configuration, the frame 102 is mounted on the ceiling 118, the duct 112 is connected to the adapter 113, and the louver 116 is mounted from the room 117 side. The air in the room 117 is sucked in from the vent 115 of the louver 116 through the intake opening 103, and is exhausted outside through the exhaust path and the duct 112.

[0007]

In such a conventional duct ventilation fan configuration, the exhaust path from the casing 107 to the adapter 113 is provided around the exhaust port 109 on the inner surface of the frame 102 and the end of the discharge port 107a of the casing 107. Part 110 and an exhaust port 109 on the outer surface of the frame 102
Is formed by abutting the periphery of the adapter 113 and the end 114 of the adapter 113, so that the airtightness is lacking. In order to compensate for the lack of airtightness, an airtight material such as a packing must be applied to each abutting portion. Therefore, the labor and material cost for attaching the airtight material increases, and when a gap is formed between the inner surface of the frame 102 and the end portion 110 of the discharge port 107a of the casing 107, the liquid remains in the casing 107. There is a problem in that dew condensation water drops along the inner surface of the frame 102 into the room 117, causing discomfort.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and reduces the number of hermetic materials such as packing and the cost without deteriorating the airtightness of an exhaust path from a casing to an adapter. It is a first object of the present invention to provide a ventilation fan for a duct, which can prevent a gap from being generated in the room and prevent condensation water from dropping into a room.

A second object is to improve the maintainability of the blower. A third object is to further improve the maintainability of the blower.

[0010]

A first means for achieving the above-mentioned first object of the present invention is a frame-like member having a top surface and a bottom surface opened by projecting from an opening provided in the ceiling to the back of the ceiling. A frame having an exhaust port on a side wall and a lower surface opening serving as an intake port, an upper wall closing an upper surface opening of the frame from the room side through the intake port, and detachably attached to the frame together with the upper wall. A blower provided, and an adapter for duct connection provided in the exhaust port, and an exhaust path is formed by directly contacting an end of a discharge port of a casing of the blower with an end of the adapter through the exhaust port. The structure of the ventilation fan for the duct made by this.

[0011] A second means for achieving the second object is a duct for providing a guide rib on both sides of an exhaust port of a frame so that both ends of a discharge port of a casing of a blower can be inserted from the indoor side. The ventilation fan will be used.

A third means for achieving the third object is that, when a blower is mounted on a frame, the blower contacts a lower end of a discharge port of a casing of the blower, positions the discharge port of the casing, and A duct ventilation fan configuration is provided in which a nail for temporarily fixing the blower is provided below an exhaust port of the frame.

[0013]

According to the first aspect of the present invention, the exhaust path from the casing to the adapter is provided by directly contacting the end of the discharge port of the casing with the end of the adapter without passing through the frame. Because it is formed, the airtightness of the exhaust path can be ensured only by providing an airtight material between the end of the discharge port of the casing and the end of the adapter, thus reducing the number of parts such as the airtight material. Therefore, the cost can be reduced and the condensation water can be prevented from dropping.

Further, according to the configuration of the second means, when performing maintenance work such as inspection and cleaning of the blower, the casing is set at an accurate position by the guide rib,
Since the airtightness and fluidity of the exhausted air can be improved and the dew condensation water can be prevented from falling, the maintenance workability can be improved.

Further, since the blower can be temporarily fixed to the frame by the structure of the third means, the troublesome work of fixing the blower to the frame while supporting the blower with one hand can be eliminated. Workability can be further improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the drawing, one of a frame 5 having a frame shape having an upper surface and a lower surface opened and a lower surface opening formed as an air inlet 4 is provided so as to protrude from an opening 2 provided in the ceiling 1 to the ceiling back 3. An exhaust port 6 is provided on the side wall.

An electric motor 9, a blade 10 and a casing 11 are provided inside the frame 5 together with an upper wall 7 having a shape for closing the upper opening of the frame 5 and detachably provided on the frame 5 with a plurality of screws 8. Is provided. The upper wall 7 and the blower 12
Are formed in a shape that can be freely taken in and out of the room 13 through the intake port 4 of the frame 5.
In a state where the casing 11 of the blower 12
The end 15 of the discharge port 14 is configured to be exposed to the outside of the frame 5 through the exhaust port 6 of the frame 5.

Further, one end 16 of the side wall of the frame 5 where the exhaust port 6 is provided is connected to the blower 1 through the exhaust port 6.
A cylindrical adapter 17 is provided to directly contact the end 15 of the discharge port 14 of the second casing 11 to communicate the exhaust path. Inside the adapter 17, a shutter 18 which is opened and closed by wind pressure is provided. ing. And
The other end of the adapter 17 is connected to a duct 19 that communicates with the outside (not shown).

At the lower portion of the frame 5, a louver 21 provided with a plurality of vents 20 in a shape to cover the intake port 4 is provided detachably from the room 13 side.

In the above configuration, when the blower 12 is operated, the air in the room 13 is sucked into the blower 12 from the ventilation port 20 of the louver 21 through the intake port 4, and is formed by the casing 11 and the adapter 17. The air is discharged outside through the exhaust path and the inside of the duct 19.

Further, the casing 11 is connected to the adapter 19.
An airtight material (not shown) such as a packing provided for improving the airtightness of the exhaust path up to the exhaust path is also provided only at one location between the end 15 of the discharge port 14 of the casing 11 and the end 16 of the adapter 17. It will be good.

As described above, according to the duct ventilation fan of the first embodiment of the present invention, the adapter 17 is
Is formed by directly abutting the end 15 of the discharge port 14 of the casing 11 and the end 16 of the adapter 17 without passing through the frame 5. End and adapter 1
The airtightness of the exhaust path can be ensured only by providing an airtight material between the airtight member 7 and the end of the airtight member 7. Therefore, the cost can be reduced by reducing the number of parts such as the airtight material, and the ventilation passage can be smoothed and the clearance can be reduced. As a result, the airtightness and fluidity of the exhausted air can be improved, and the condensation water can be prevented from falling.

Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

The second embodiment differs from the first embodiment in the structure of the frame, and the same parts as those in the first embodiment are denoted by the same reference numerals and the description thereof will be omitted.

As shown in the figure, when the upper wall 7 and the blower 12 are assembled to the frame 5A from the room 13 side, both sides of the discharge port 14 of the casing 11 are provided on both sides of the exhaust port 6 provided on the frame 5A on the casing 11 side. An L-shaped guide rib 22 is provided so that the end can be inserted along.

In the above configuration, when performing maintenance work such as inspection and cleaning of the blower 12, first remove the louver 21 from the frame 5A, and then put a hand into the inside of the frame 5A from the intake port 4 and screw the screw. 8, the upper wall 7 and the blower 12 are taken out of the air inlet 4 into the room, and the blower 12 is inspected, cleaned, and the like. When the upper wall 7 and the blower 12 are inserted into the casing 5A from the intake port 4 and pushed upward so as to match the lower end, the discharge port 14 of the casing 11 is guided by the guide ribs 22, and the exhaust port of the frame 5A is 6 does not displace in the left-right direction, the screws 8 are tightened in this state, and the upper wall 7 and Securing the 12 to frame 5A.
By attaching the louver 21 to the frame 5A, the maintenance work can be completed.

As described above, according to the duct ventilation fan of the second embodiment of the present invention, when the maintenance work such as the inspection and cleaning of the blower 12 is performed, the casing 11 is provided with the guide rib 2.
By setting 2, the airtightness and fluidity of the air that is set at the correct position and exhausted can be improved, and the dew condensation water can be prevented from falling, so that the maintenance workability can be improved.

Next, a third embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG.

The third embodiment differs from the second embodiment in the structure of the frame. The same parts as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

As shown in the figure, when assembling the upper wall 7 and the blower 12 to the frame 5B, the upper ends of both ends of the discharge port 14 of the casing 11 are inserted into the lower ends of the guide ribs 22 provided on the frame 5B. Then, the end of the discharge port 14 of the casing 11 is brought into contact with the end of the discharge port 14 to bend, and the discharge port 14 of the casing 5B is inserted to a position matching the exhaust port 6 of the frame 5B. It is characterized in that a claw 23 which abuts on the lower end portion and positions the discharge port 14 and temporarily fixes the upper wall 7 and the blower 12 to the frame 5B is provided below the exhaust port 6 of the frame 5B.

In the above configuration, when maintenance work such as inspection and cleaning of the blower is performed, as in the second embodiment, inspection and cleaning of the blower 12 are performed, and then the upper wall 7 and the blower 12 are removed. When the casing 1B is inserted into the casing 5B from the intake port 4 and pushed upward, the casing 1
While being guided by the guide ribs 22, the first discharge port 14 is aligned with the exhaust port 6 of the frame 5 </ b> B without shifting in the left-right direction, and at the same time, the claw 23 provided on the frame 5 </ b> B The upper wall 7 and the blower 12 are temporarily fixed, and the screw 8
And the upper wall 7 and the blower 12 can be fixed to the frame 5B.

As described above, according to the duct ventilation fan of the third embodiment of the present invention, when the maintenance work such as the inspection and cleaning of the blower 12 is performed, the casing 11 is provided with the guide rib 2.
Since the upper wall 7 and the blower 12 can be temporarily fixed to the frame 5B while being set at an accurate position by the hooks 2 and the pawls 23, the troublesome work of tightening the screw 8 while supporting them with one hand is eliminated. As a result, the maintenance workability can be further improved.

[0034]

As is apparent from the above embodiments, according to the present invention, the duct is connected to the end of the discharge port of the casing forming the blower provided in the frame and the duct for exhausting the exhaust air to the outside. By directly abutting the end of the adapter serving as a connection part to communicate the exhaust path, the number of hermetic materials such as packing is reduced and the cost is reduced without impairing the airtightness of the exhaust path from the casing to the adapter. It is possible to provide a duct ventilation fan which has an effect of preventing dew condensation water from falling into a room even if a gap is generated between the casing and the frame.

Further, by providing guide ribs on both sides of the exhaust port of the frame so that both ends of the discharge port of the casing of the blower can be inserted from the indoor side, maintenance workability of the blower can be improved.

When the blower is mounted on the frame, the lower end of the discharge port of the casing of the blower is brought into contact with the lower end portion of the casing, and the pawl for temporarily fixing the blower is provided below the exhaust port of the frame. Thereby, the maintenance workability of the blower can be further improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an installation state of a duct ventilation fan according to a first embodiment of the present invention.

FIG. 2 is a partially broken bottom view of the duct ventilation fan of the first embodiment.

FIG. 3 is a sectional view showing an installation state of a duct ventilation fan according to the second embodiment.

FIG. 4 is a partially broken bottom view of the duct ventilation fan of the second embodiment.

FIG. 5 is a sectional view showing an installation state of a duct ventilation fan according to the third embodiment.

FIG. 6 is a partially broken bottom view of the duct ventilation fan of the third embodiment.

FIG. 7 is a sectional view showing an installation state of a conventional duct ventilation fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceiling 2 Opening 3 Ceiling back 4 Inlet 5 Frame 5A Frame 5B Frame 6 Exhaust port 7 Upper wall 11 Casing 12 Blower 14 Discharge port 17 Adapter 22 Guide rib 23

Claims (3)

(57) [Claims] 1. A frame having a shape of a frame protruding from the opening provided on the ceiling to the back of the ceiling, having upper and lower surfaces opened, having an exhaust port on a side wall, and having a lower surface opening serving as an intake port. An upper wall that closes an upper surface opening of the blower from the indoor side through the intake port, and a blower detachably provided on the frame together with the upper wall, and a duct connection adapter provided at the exhaust port. A ventilation fan for a duct, wherein an exhaust path is formed by directly abutting an end of a discharge port of a casing and an end of the adapter through the exhaust port. 2. The duct ventilation fan according to claim 1, wherein guide ribs are provided on both sides of the exhaust port of the frame so that both end portions of the discharge port of the casing of the blower can be inserted from the indoor side. 3. When the blower is mounted on the frame, the lower end of the blower is brought into contact with the lower end of the discharge port of the casing, and the positioning of the discharge port of the casing and the nail for temporarily fixing the blower are positioned below the exhaust port of the frame. The ventilation fan for ducts according to claim 1 or 2, which is provided on the side.