JPH0894147A - Ventilating fan for duct - Google Patents

Abstract

PURPOSE: To provide a ventilating fan for a duct in which the count of sealing materials such as packings, etc., is reduced without impairing the airtightness of the exhaust route from a casing to an adapter to reduce the cost, a gap is formed between the casing and a frame, and dropping of condensate from a room is prevented. CONSTITUTION: The end 15 of the discharge port 14 of a casing 11 for forming a blower 12 provided in a frame 5 is brought into direct contact with the end 16 of an adapter 17 to be a duct connector connected with a duct 19 for exhausting the exhaust flow to the outdoor via the exhaust port 6 of the frame 5 to communicate with an exhaust route.

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 mounted on a ceiling for use.

[0002]

2. Description of the Related Art Heretofore, a duct ventilation fan of this type has generally been constructed as shown in Japanese Utility Model Laid-Open No. 60-65540. The configuration will be described below with reference to FIG. 7.

As shown in the figure, the upper wall 101 is a frame 1
No. 02, the upper wall 10 is detachably provided on the frame 102 by a plurality of screws 104.
1 includes an electric motor 105, blades 106, and a casing 10.
A blower 108 composed of 7 is provided. The blower 108 has an end portion 1 of the discharge port 107a of the casing 107.
10 are attached by a plurality of screws 104a so as to be in contact with the periphery of 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, an adapter 113 having a tubular shape for connecting the duct 112 and having a wind pressure type shutter 111 inside.
The end portion 114 is provided so as to abut, and the exhaust path from the casing 107 to the adapter 113 is formed in this manner.

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

In the above structure, the frame 102 is attached to the ceiling 118, the duct 112 is connected to the adapter 113, and the louver 116 is attached from the side of the room 117 to enable use, and the blades 106 are rotated by operating the electric motor 105. The air in the room 117 is sucked from the ventilation port 115 of the louver 116 through the intake opening 103, and is exhausted to the 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 at the end of the discharge port 107a of the casing 107. The exhaust port 109 on the outer surface of the portion 110 and the frame 102
Since it is formed by abutting two places of the periphery of the adapter and the end 114 of the adapter 113, it lacks airtightness, and in order to compensate for it, an airtight material such as packing must be bitten on each abutting part. Therefore, the labor and material cost for applying the airtight material increase, 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, it is accumulated in the casing 107. There is a problem that the dew condensation water travels along the inner surface of the frame 102 and falls into the room 117, which causes discomfort.

The present invention has been made to solve the above-mentioned problems, and reduces the number of airtight materials such as packing to reduce the cost without impairing the airtightness of the exhaust path from the casing to the adapter, and at the same time between the casing and the frame. A first object of the present invention is to provide a duct ventilation fan capable of preventing a dew condensation water from dropping into a room due to a gap formed in the interior.

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

[0010]

A first means for achieving the above first object of the present invention is a frame-like structure in which an opening provided in the ceiling is projected to the back of the ceiling and an upper surface and a lower surface are opened. A frame having an exhaust port on the side wall and an intake port on the lower surface, an upper wall closing the upper opening of the frame from the indoor side through the intake port, and detachably attached to the frame together with the upper wall. A blower provided and an adapter for connecting a duct provided at the exhaust port are provided, and an end portion of the outlet of the casing of the blower and an end portion of the adapter are directly contacted through the exhaust port to form an exhaust path. The ventilation fan for the duct will be constructed.

A second means for achieving the second object is a duct provided with guide ribs on both sides of the exhaust port of the frame, into which both end portions of the discharge port of the casing of the blower can be inserted from the indoor side. Use a ventilation fan.

The third means for achieving the third object is to contact the lower end portion of the discharge port of the casing of the blower when the blower is mounted on the frame, to position the discharge port of the casing, and A pawl for temporarily fixing the blower has a duct ventilation fan structure provided below the exhaust port of the frame.

[0013]

According to the present invention, by the structure of the above-mentioned first means, the end of the outlet of the casing and the end of the adapter are brought into direct contact with each other in the exhaust path from the casing to the adapter without the frame. Since it is formed, the airtightness of the exhaust path can be secured simply by providing an airtight material between the end of the outlet of the casing and the end of the adapter, thus reducing the number of parts such as airtight material. Therefore, the cost can be reduced and the condensed water can be prevented from falling.

Further, according to the structure of the second means, the casing is set at the correct position by the guide ribs when performing maintenance work such as inspection and cleaning of the blower,
Since the airtightness and the fluidity of the exhausted air can be improved and the condensed water can be prevented from falling, the maintenance workability thereof can be improved.

Further, since the blower can be temporarily fixed to the frame by the configuration of the third means, it is possible to avoid the troublesome work of fixing the blower to the frame while supporting the blower with one hand, and maintenance thereof. 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 figure, one of the frames 5 has a frame-like shape that projects from an opening 2 provided in a ceiling 1 to a ceiling back 3 and has an upper surface and a lower surface opened, and a lower surface opening having an intake port 4. An exhaust port 6 is provided on the side wall.

Further, inside the frame 5, an electric motor 9, blades 10 and a casing 11 which are removably provided on the frame 5 by a plurality of screws 8 together with an upper wall 7 having a shape for closing the upper opening of the frame 5. Blower 12 is provided. The upper wall 7 and the blower 12
Is formed into a shape that can be freely taken in and out from the indoor side 13 through the intake port 4 of the frame 5.
The casing 11 of the blower 12 when attached to the
The end portion 15 of the discharge port 14 is 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 provided with the exhaust port 6 is passed through the exhaust port 6 to blower 1
There is provided a cylindrical adapter 17 that directly contacts the end portion 15 of the discharge port 14 of the second casing 11 to communicate the exhaust path, and inside the adapter 17, a shutter 18 that is opened and closed by wind pressure is provided. ing. And
A duct 19 communicating with the outside (not shown) is connected to the other end of the adapter 17.

Further, a louver 21 having a plurality of ventilation holes 20 in a shape covering the intake port 4 is provided in the lower portion of the frame 5 so as to be detachable from the room 13 side.

In the above structure, 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. It will be discharged to the outside of the room through the exhaust path and the inside of the duct 19.

Also, from the casing 11 to the adapter 19
The airtight material (not shown) such as packing provided when improving the airtightness of the exhaust path up to is only at one place 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 casing 11 to the adapter 17 are provided.
Since the exhaust path up to is formed by directly abutting the end portion 15 of the discharge port 14 of the casing 11 and the end portion 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 end portion of No. 7 and the end portion of 7. By reducing the amount, it is possible to improve the airtightness and fluidity of the exhausted air and prevent the dew condensation water from falling.

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

The second embodiment is different from the first embodiment in the frame structure, and the same parts as those in the first embodiment are designated 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 the guide rib 22.

In the above structure, when performing maintenance work such as inspection and cleaning of the blower 12, first, the louver 21 is removed from the frame 5A, and then the hand is put into the frame 5A from the intake port 4 and screwed. After removing 8 and taking out the upper wall 7 and the blower 12 from the intake port 4 into the room to inspect and clean the blower 12, the upper ends of both side ends of the discharge port 14 of the casing 11 have the guide ribs 22. When the upper wall 7 and the blower 12 are inserted into the casing 5A from the intake port 4 and pushed up so as to match the lower end, the discharge port 14 of the casing 11 is guided by the guide ribs 22 while the exhaust port of the frame 5A is being guided. 6 does not shift in the left-right direction, but matches, and in this state, tighten the screw 8 to secure the upper wall 7 and the air blower. Securing the 12 to frame 5A.
The maintenance work can be completed by attaching the louver 21 to the frame 5A.

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

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

The third embodiment is different from the second embodiment in the frame structure, and the same parts as those in the second embodiment are designated by the same reference numerals and the description thereof will be 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 side 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 discharge port 14 of the casing 11 is brought into contact with the end of the discharge port 14 and bent toward the side opposite to the discharge port 14, and when the discharge port 14 of the casing 5B is inserted to a position matching the exhaust port 6 of the frame 5B, the discharge port 14 It is characterized in that it comes into contact with the lower end to position the discharge port 14, and a pawl 23 for temporarily fixing 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 structure, when performing maintenance work such as inspection and cleaning of the blower, the blower 12 is checked and cleaned as in the case of the second embodiment, and then the upper wall 7 and the blower 12 are removed. When the casing 1 is inserted from the intake port 4 into the casing 5B and pushed up, the casing 1
The first discharge port 14 is guided by the guide ribs 22 and is aligned with the exhaust port 6 of the frame 5B without being displaced in the left-right direction. The upper wall 7 and the blower 12 are temporarily fixed by abutting against each other, and in this state, the screw 8
The upper wall 7 and the blower 12 can be fixed to the frame 5B by tightening.

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

[0034]

As is apparent from the above embodiments, according to the present invention, the end of the discharge port of the casing forming the blower provided in the frame and the duct for connecting the exhaust air to the outside of the duct are connected. By directly contacting the end part of the adapter that is the connection part and communicating the exhaust path, it is possible to reduce the number of airtight materials such as packing and reduce the cost without impairing the airtightness of the exhaust path from the casing to the adapter. In addition, it is possible to provide a duct ventilation fan that is effective in preventing condensed water from falling into the 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 end portions 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.

Further, when the blower is attached to the frame, the lower end of the discharge port of the casing of the blower is abutted to position the discharge port of the casing and a pawl for temporarily fixing the blower is provided below the exhaust port of the frame. As a result, the maintenance workability of the blower can be further improved.

[Brief description of drawings]

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

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

FIG. 3 is a cross-sectional view showing an installed state of the duct ventilation fan of the second embodiment.

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

FIG. 5 is a cross-sectional view showing an installed state of the duct ventilation fan of the third embodiment.

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

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

[Explanation of symbols]

 1 Ceiling 2 Opening 3 Back of ceiling 4 Intake port 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)

[Claims] 1. A frame which is projecting from the opening provided on the ceiling to the back of the ceiling, has an upper surface and a lower surface opened, has an exhaust port on a side wall, and has a lower surface opening as an intake port, and this frame. An upper wall that closes the upper surface opening of the indoor side through the intake port, and a blower detachably provided on the frame together with the upper wall, and an adapter for duct connection provided at the exhaust port, A ventilation fan for a duct, wherein an end of a discharge port of a casing and an end of the adapter are directly contacted with each other through the exhaust port to form an exhaust path. 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 attached to 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 discharge port of the casing, and a pawl for temporarily fixing the blower is provided under the exhaust port of the frame. The duct ventilation fan according to claim 1 or 2, which is provided on the side.