JP2618166B2 - 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 which is mainly installed on a ceiling surface of a room and is connected to a duct communicating with the outside to ventilate indoor air.

[0002]

2. Description of the Related Art In recent years, a ventilation fan for a duct, which is used by attaching a main body to an underside of a ceiling and connecting a duct, hangs the main body from a ceiling wall, performs duct piping work, and then stretches a ceiling material. Since the position of the main body is adjusted to the position of the ceiling material, there is an increasing demand for a device that facilitates this adjustment work.

A conventional duct ventilation fan of this type will be described below with reference to FIGS. As shown in the drawing, a box-shaped main body 101 has a discharge port 102 on one side and a suction port 103 on a lower surface, and a blower 104 is provided inside, and the suction port 103 is inscribed in the main body 101. A slide frame 105 is provided, and on the inner surface of the slide frame 105,
A gap that opens in the vertical direction is formed between the inner frame and the inner surface, and a slide frame-side guide section 106 having the gap as an insertion port 106a is provided. A long hole 107 in the direction,
A lock hole 110 is provided for locking a decorative grill mounting spring 109 provided on a decorative grill 108 which is removably mounted to the indoor opening end of the slide frame 105.

[0004] The slide frame side guide portion 106 is provided on two opposing inner surfaces of the slide frame 105, and a packing 111 that covers a gap between the inner peripheral surface of the main body 101 and the outer periphery of the upper end portion of the slide frame 105 is attached. Have been.

[0005] Inside the main body 101, an elongated hole 107 is inserted into an insertion opening 106a of the slide frame guide 106.
A main body side guide portion 114 having a screw hole 113 for screwing with a slidable screw 112 is provided.

Then, the main body 101 is hung above the ceiling by hanging rods 116 provided on the ceiling wall 115, and
A duct 117 communicating with the outside of the room was connected to one discharge port 102, a ceiling material 118 was stretched, and a ceiling opening 119 was formed.

In order to adjust the main body 101 of the duct ventilation fan constructed as described above to the position of the ceiling member 118, the slide frame side guide 106 provided on the slide frame 105 is attached to the main body side guide 114. Fixing screw 112
After loosening, the slide frame 105 is lowered to the position of the ceiling material 118, and the position is adjusted by tightening the screw 112 to fix the position in the vertical direction.

[0008]

In such a conventional ventilation fan for a duct, the position of the main body 101 and the ceiling member 118 can be easily adjusted by the slide frame 105, but the main body 101 is slightly moved relative to the ceiling member 118. When the slide frame 105 is lowered to the lowermost end when the slide frame 105 is not hung horizontally, the slide frame 105 is fixed by being inclined with the screw 112 as a fulcrum.
Dropping from the main body 101, a gap is generated between the upper end of the slide frame 105 and the lower end of the main body 101, and the air in the room 120 leaks to the ceiling as shown by the arrow P, and conversely, the arrow P ' The air behind the ceiling is ventilated as in
There was a problem that the air in the air could not be sufficiently ventilated. Also,
Since it is difficult to accurately open the ceiling opening 119, a gap is generated between the ceiling frame 119 and the slide frame 105, and furthermore, a gap generated between the slide frame 105 and the decorative grille 108 causes the arrow Q or arrow Q ' There is a problem that air leaks through such a route.

Further, since the lower end portion of the main body 101 has an exposed end surface, not only safety is poor, but also the strength is weak, and there is a problem that it is easily deformed during construction. SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a first object of the present invention is to provide a duct ventilation fan which is easy to construct and does not leak indoor air to the ceiling or ventilate the air behind the ceiling. Aim.

A second object of the present invention is to provide a ventilation fan for a duct which has sufficient strength and is free from deformation while improving safety during construction.

[0011]

In order to achieve the first object, a duct ventilation fan of the present invention has a discharge port connected to a duct on a side surface and a suction port on a lower surface. A box-shaped main body formed and provided with a blower therein, and a slide frame formed with an outwardly protruding flange portion at the upper end portion and provided inside the suction side of the main body and locked vertically slidably. A makeup grille removably provided on the slide frame so as to cover the suction port, and a first packing for closing a gap with the slide frame is provided on an inner periphery of a lower end portion of the main body.

Further, in order to achieve the first object, the second means has a configuration in which a second packing is provided at a corresponding portion of the decorative grill corresponding to a lower end portion of the slide frame.

In order to achieve the second object, a third means is to provide a bent portion corresponding to the slide frame inside the lower end portion of the main body, and a third portion which contacts the inner surface of the main body at the upper end portion of the slide frame. Is provided.

[0014]

According to the first aspect of the present invention, the main body is suspended from the ceiling wall and the slide frame is moved up and down to adjust the suspended main body to the position of the ceiling material. Lower to the position of the material and lock and adjust.

[0015] Further, a gap where air leakage occurs due to the flange portion of the slide frame and the first packing is eliminated. Also, even when the slide frame is lowered to the lowermost position when the main body is not hung horizontally with respect to the ceiling material, the flange at the upper end of the slide frame abuts on the first packing provided at the lower end of the main body to serve as a stopper. As a result, the upper end of the slide frame does not drop off from the main body, so that there is no gap that causes air leakage, and the space above the ceiling and the room do not communicate with each other at the upper end of the slide frame.

Therefore, room air leaks from above the ceiling,
It is possible to prevent a decrease in ventilation efficiency caused by ventilating the air behind the ceiling.

Further, according to the structure of the second means, the lower end of the slide frame lowered to the position of the ceiling material abuts on the second packing provided on the inner surface of the decorative grill, and a gap between the lower end of the slide frame and the decorative grill is formed. Blockage of the air leakage can be prevented.

[0018] Further, according to the third means, since the inwardly bent portion is formed at the lower end of the main body, the thin end of the main body is not exposed to the worker who works from below.
Since safety during construction is improved and strength is increased, deformation and the like can be prevented.

Also, since the third packing is provided on the outer periphery of the upper end of the slide frame, when the slide frame is lowered,
The bent portion at the lower end of the main body and the third packing at the upper end of the slide frame come into contact with each other to function as a stopper, thereby preventing the upper end of the slide frame from dropping off from the lower end of the main body and preventing the occurrence of a gap that causes air leakage, and preventing the indoor air from flowing. It is possible to prevent leakage into the ceiling and a decrease in ventilation efficiency.

[0020]

【Example】

Embodiment 1 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in the figure, a discharge port 3 connected to a duct 2 on one side and a suction port 4 on a lower surface are formed in a box-shaped main body 1, and a blower 5 is provided therein. Is provided with a slide frame 6 which is inscribed in the main body 1, and a gap which opens in the vertical direction is formed on the inner surface of the slide frame 6, and a slide frame side guide having this gap as 7 a The sliding frame side guide portion 7 has a slot 8 in the vertical direction, and a decorative grill mounting spring provided on a decorative grill 9 detachably mounted on the indoor opening end of the sliding frame 6. A lock hole 11 for locking the lock 10 is provided.

The slide frame side guide 7 is provided on two opposing inner side surfaces of the slide frame 6, and an upper end of the slide frame 6 is provided with an outwardly protruding flange portion 12.
A first packing 13 that covers a gap with the slide frame 6 is attached to the inner periphery of the lower end of the first packing 13.

Also, inside the main body 1, a main body side guide portion having a screw hole 15 which is inserted into the insertion opening 7 a of the slide frame guide portion 7 and is screwed with a screw 14 slidable into the long hole 8. A second packing 17 is provided at a portion corresponding to the inner surface of the decorative grille 9 corresponding to the lower end portion of the slide frame 6.

In the above arrangement, when the duct ventilation fan is installed on the ceiling, the main body 1 is attached to the hanging rod 19 suspended from the ceiling wall 18, the duct 2 is connected to the discharge port 3, and the ceiling material 20 is stretched. And an opening 21 is formed.

In order to adjust the main body 1 to the position of the ceiling member 20, the screws 14 that fix the slide frame side guide 7 provided on the slide frame 6 to the main body side guide 16 are loosened. The slide frame 6 is lowered to the position of the ceiling material 20, and the screw 14 is tightened and adjusted.

Also, depending on the mounting condition,
Even when the slide frame 6 is not hung horizontally, when the slide frame 6 is lowered to the lowermost position, the outwardly protruding flange portion 12 provided at the upper end of the slide frame 6 is attached to the inner periphery of the lower end of the main body 1. The first packing 13 contacts the first packing 13 and functions as a stopper, so that a gap for air leakage between the lower end of the main body 1 and the upper end of the slide frame 6 does not occur.

When the decorative grill 9 is mounted by inserting the decorative grill mounting spring 10 into the slide frame side guide member 7, the lower end of the slide frame 6 is attached to the second packing 17 provided on the inner surface of the decorative grill 9. Attached in contact.

As described above, according to the duct ventilation fan of the first embodiment of the present invention, the position adjustment for eliminating the gap between the main body 1 and the ceiling member 20 is performed by the slide frame 6, and the upper end of the slide frame 5 is provided. The slide frame 6 is lowered to the lowermost end regardless of the horizontal accuracy when the main body 1 is suspended by the flange portion 12 provided on the main body 1 and the first packing 13 attached to the inner periphery of the lower end portion of the suction port 4. In addition, the slide frame 6 does not fall out of the main body 1, so that a gap for air leakage does not occur.

Since the second packing 17 closes the gap between the slide frame 6 and the decorative grill 9, the opening 21
Is significantly larger than the slide frame 6, and even if a gap is generated between the slide frame 6 and the opening 21, the air in the room 22 leaks to the ceiling and the ventilation efficiency decreases due to ventilation of the air behind the ceiling. Can be prevented.

(Embodiment 2) Hereinafter, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description is omitted.

As shown in the figure, an inwardly bent portion 23 is provided at the lower end of the main body 1a, and a third packing 24 is provided on the outer periphery of the upper end of the slide frame 6a.

With the above configuration, the bent portion 23 formed at the lower end of the main body 1a acts as a stopper for the third packing 24 provided on the outer periphery of the upper end of the slide frame 6a. It is prevented from dropping from 1a and generating a gap.

Further, the bent portion 23 prevents the lower end of the main body 1a from being exposed at the lower end, thereby improving safety, increasing strength, and preventing deformation. As described above, according to the duct ventilation fan of the second embodiment of the present invention, the bent portion 23 and the third packing 24 do not cause the slide frame 6a to drop from the main body 1a and generate a gap. In addition to preventing the air leakage and the reduction in ventilation efficiency, the safety at the time of construction is improved and the strength is increased, so that the deformation of the main body 1a can be prevented.

It is needless to say that even if the bent portion 23 is turned back, no difference is produced in its operation and effect.

[0035]

As is apparent from the above embodiment, according to the present invention, an outwardly projecting flange portion is formed at the upper end portion, and is provided inside the suction side of the main body so as to be slidable up and down. Is provided, and the first packing for closing the gap with the slide frame is provided on the inner periphery of the lower end portion of the main body, so that the slide frame is prevented from dropping from the main body, and the gap is easily generated without generating a gap. Work can be performed, and a ventilation fan for a duct can be provided that can prevent indoor air from leaking above the ceiling and lowering of ventilation efficiency.

In addition, since the second packing is provided on the inner surface of the decorative grill so that the lower end of the slide frame abuts, even if the accuracy of the opening of the ceiling is poor, it is possible to prevent leakage of indoor air and a decrease in ventilation efficiency. it can.

Further, since the inwardly bent portion is formed at the lower end of the main body, and the third packing is provided on the outer periphery of the upper end of the slide frame, the safety at the time of construction is greatly improved. Strength is increased and deformation is prevented.

[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 an exploded perspective view of the duct ventilation fan according to the first embodiment.

FIG. 3 is a side view showing a state in which the duct ventilation fan of the first embodiment is inclined.

FIG. 4 is a sectional view showing an installation state of the duct ventilation fan according to the second embodiment.

FIG. 5 is a sectional view showing an installation state of a conventional duct ventilation fan.

FIG. 6 is a side view showing a state where the duct ventilation fan is inclined.

FIG. 7 is an exploded perspective view of the ventilation fan for the duct.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, 1a Main body 2 Duct 3 Discharge port 4 Suction port 5 Blower 6, 6a Slide frame 9 Makeup grill 12 Flange part 13 First packing 17 Second packing 23 Bent part 24 Third packing

Claims (3)

(57) [Claims] 1. A box-shaped main body having a discharge port connected to a duct on a side surface, a suction port formed on a lower surface, and a blower provided inside, and a flange portion projecting outward at an upper end portion. A lower end of the main body, comprising: a slide frame provided inside the suction side of the main body and slidably locked vertically, and a makeup grill removably provided on the slide frame so as to cover the suction port. A ventilation fan for a duct, wherein a first packing is provided on the inner periphery to close a gap with the slide frame. 2. The duct ventilation fan according to claim 1, wherein a second packing is provided at a corresponding portion of the decorative grill corresponding to a lower end portion of the slide frame. 3. The ventilation fan for a duct according to claim 1, wherein a bent portion corresponding to the slide frame is provided inside a lower end portion of the main body, and a third packing is provided at an upper end portion of the slide frame so as to contact an inner surface of the main body.