JPH06159756A - Ventilation fan for duct - Google Patents

Abstract

PURPOSE:To provide a ventilation fan for a duct in which its installing work is easily carried out, interior air is not leaked toward a rear part of a ceiling and the air within the rear part of the ceiling is not ventilated. CONSTITUTION:There are provided a sliding frame 6 forming a flange part 12 projected outwardly at an upper end and slidably engaging with a lower surface suction side of a main body of a ventilation fan in a vertical direction, and an ornamental grill 9 arranged to cover the suction port of the main body 1. An inner circumference of a lower end of the main body 1 is provided with a first packing 13 closing the clearance between it and the sliding frame 6.

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 installed mainly on the 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 the ceiling and connecting a duct, hangs the main body from a ceiling wall to perform duct piping work, and then extends a ceiling material. Since the main body is adjusted to the position of the ceiling material, there is an increasing demand for something 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 figure, the box-shaped main body 101 has a discharge port 102 on one side surface and a suction port 103 on the lower surface, and a blower 104 is provided inside, and the suction port 103 is inscribed in the main body 101. The slide frame 105 is provided, and on the inner surface of the slide frame 105,
A slide frame-side guide portion 106 is provided which forms a gap that opens in the up-down direction with the inner side surface and uses this gap as an insertion opening 106a. The slide frame-side guide portion 106 has a movement direction, that is, a vertical direction. Long hole 107 in the direction,
A lock hole 110 for locking a decorative grill mounting spring 109 provided on a decorative grill 108 that is detachably attached to the indoor opening end of the slide frame 105 is provided.

The slide frame side guide portion 106 is provided on two inner side surfaces of the slide frame 105 which face each other, and a packing 111 is attached to the outer periphery of the upper end portion of the slide frame 105 to close the inner peripheral surface of the main body 101 and the gap. Has been.

Inside the main body 101, the slot 107 is fitted into the insertion opening 106a of the slide frame guide portion 106.
A main body side guide portion 114 having a screw hole 113 to be screwed with a slidable screw 112 is provided.

Then, the main body 101 is suspended above the ceiling by a suspension rod 116 provided on the ceiling wall 115, and the main body 10 is suspended.
A duct 117 communicating with the outside of the room was connected to the discharge port 102 of No. 1, 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 material 118, the slide frame side guide portion 106 provided on the slide frame 105 is set to the main body side guide portion 114. Fixing screws 112
After loosening, the slide frame 105 is lowered to the position of the ceiling material 118, and the screw 112 is tightened to fix the position in the up-down direction to adjust the position.

[0008]

In such a conventional duct ventilation fan, the positions of the main body 101 and the ceiling member 118 are easily adjusted by the slide frame 105, but the main body 101 is slightly smaller than the ceiling member 118. When the slide frame 105 is not hung horizontally and is lowered to the lowermost end, the slide frame 105 is fixed while being inclined with the screw 112 as a fulcrum.
Is dropped from the main body 101, and a gap is generated between the upper end of the slide frame 105 and the lower end of the main body 101, so that the air in the room 120 leaks to the ceiling as indicated by arrow P, or conversely the arrow P ′ indicates. The air inside the ceiling like this
There was a problem that I could not ventilate the air. Also,
Since it is difficult to open the ceiling opening 119 with high precision, a gap is generated between the ceiling frame 119 and the slide frame 105, and further, depending on a gap generated between the slide frame 105 and the makeup grill 108, the arrow Q or the arrow Q ′ is indicated. There was a problem that air leaks through such a route.

Further, since the end face of the lower end of the main body 101 is exposed, there is a problem that not only the safety is poor, but also the strength is weak and the work body is easily deformed. The present invention solves the above problems, and it is a first object of the present invention to provide a duct ventilation fan that is easy to construct and does not leak indoor air into the ceiling or ventilate the air above the ceiling. To aim.

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

[0011]

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

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

Further, in order to achieve the second object, the third means is that the bent portion corresponding to the slide frame is provided inside the lower end portion of the main body, and the upper end portion of the slide frame is brought into contact with the inner surface of the main body. The packing is provided.

[0014]

According to the present invention, with the structure of the first means described above, 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.

Further, the flange portion of the slide frame and the first packing eliminate a gap in which air leakage occurs. Also, even if the slide frame is lowered to the bottom when the main body is not suspended horizontally from the ceiling material, the flange part at the upper end of the slide frame comes into contact with the first packing provided at the lower end of the main body to serve as a stopper. Because of the action, the upper end of the slide frame does not drop off from the main body and a gap that causes air leakage does not occur, and the ceiling top and the room do not communicate with each other at the upper end of the slide frame.

Therefore, leakage of room air into the ceiling and
It is possible to prevent a decrease in ventilation efficiency due to ventilation of the air above 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 member comes into contact with the second packing provided on the inner surface of the decorative grill, so that the gap between the lower end of the slide frame and the decorative grill is provided. It will be blocked and air leakage can be prevented.

In addition, since the inwardly bent portion is formed at the lower end of the main body by the structure of the third means, the thin end of the main body is not exposed to the worker working from below.
Since the safety during construction is improved and the strength is increased, it is possible to prevent deformation and the like.

Further, 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, which prevents the upper end of the slide frame from coming off from the lower end of the main body to cause a gap that causes air leakage, and It is possible to prevent leaks to the ceiling and 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 box-shaped main body 1 is provided with a discharge port 3 connected to a duct 2 on one side and a suction port 4 on the lower surface, and a blower 5 is provided inside the suction port 4. A slide frame 6 that is inscribed in the main body 1 is provided on the slide frame 6. An inner side surface of the slide frame 6 is provided with a gap that opens in the up-down direction between the slide frame 6 and the slide frame side guide 7a. The slide frame side guide portion 7 is provided with an elongated hole 8 in the vertical direction and a makeup grill mounting spring provided on a makeup grill 9 detachably attached to the indoor opening end of the slide frame 6. A locking hole 11 for locking 10 is provided.

The slide frame side guide portions 7 are provided on the two inner side surfaces of the slide frame 6 which face each other, and the flange portion 12 projecting outward is provided at the upper end portion of the slide frame 6, and the main body 1
A first packing 13 is attached to the inner circumference of the lower end of the first packing 13 to close the gap with the slide frame 6.

Further, inside the main body 1, a main body side guide portion having a screw hole 15 which is fitted in the insertion opening 7a of the slide frame guide portion 7 and is screwed into the slidable screw 14 in the long hole 8. 16 is provided, and a second packing 17 is provided at a corresponding portion on the inner surface of the decorative grill 9 corresponding to the lower end portion of the slide frame 6.

In the above structure, when the duct ventilation fan is installed on the ceiling, the main body 1 is attached to the hanging rod 19 hung on the ceiling wall 18, the duct 2 is connected to the discharge port 3, and then the ceiling material 20 is stretched. Then, the opening 21 is formed.

To adjust the main body 1 to the position of the ceiling member 20, after loosening the screw 14 that fixes the slide frame side guide portion 7 provided on the slide frame 6 to the main body side guide portion 16, The slide frame 6 is lowered to the position of the ceiling material 20, and the screw 14 is tightened and adjusted.

Further, depending on the mounting condition,
Even if it is not hung horizontally, when the slide frame 6 is lowered to the lowermost part, the outwardly protruding flange portion 12 provided on the upper end portion of the slide frame 6 is attached to the inner periphery of the lower end portion of the main body 1. The first packing 13 is brought into contact with the first packing 13 to act as a stopper, and a gap for air leakage is not generated between the lower end of the main body 1 and the upper end of the slide frame 6.

When the makeup grill attachment spring 10 is inserted into the slide frame side guide member 7 and the makeup grill 9 is attached, the lower end portion of the slide frame 6 becomes the second packing 17 provided on the inner surface of the makeup grill 9. It is attached by abutting.

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 portion of the slide frame 5. With the flange portion 12 provided in and the first packing 13 attached to the inner circumference of the lower end portion of the suction port 4, the slide frame 6 is lowered to the lowest end regardless of the horizontal accuracy when the main body 1 is suspended. However, the slide frame 6 does not drop off from the main body 1, and a gap for air leakage does not occur.

Further, since the second packing 17 closes the gap between the slide frame 6 and the makeup grill 9, the opening 21 is formed.
Is much larger than the slide frame 6, and even if a gap occurs between the slide frame 6 and the opening 21, the air in the room 22 leaks to the back of the ceiling or the ventilation efficiency decreases due to the ventilation of the air in the back of the ceiling. Can be prevented.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG. The same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in the figure, an inward 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 structure, 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, and the slide frame 6a is main body. It is prevented from falling off from 1a and generating a gap.

Further, the bent portion 23 prevents the lower end portion of the main body 1a from being exposed downward, which improves safety, increases strength, and prevents deformation. As described above, according to the duct ventilation fan of the second embodiment of the present invention, since the slide frame 6a does not fall off the main body 1a due to the bent portion 23 and the third packing 24, no gap is generated in the room. It is possible to prevent the leakage of air and the reduction of ventilation efficiency, and it is also possible to prevent the deformation of the main body 1a by improving the safety during construction and increasing the strength.

Needless to say, even if the bent portion 23 is folded back, there is no difference in its function and effect.

[0035]

As is apparent from the above embodiments, according to the present invention, a flange portion projecting outward is formed at the upper end portion and is internally provided on the suction side of the main body so as to be slidable vertically. Since the slide frame is provided, and the first packing that closes the gap with the slide frame is provided on the inner circumference of the lower end of the main body, the slide frame is prevented from falling off the main body, and no gap is generated easily. It is possible to provide a duct ventilation fan that enables work and prevents indoor air from leaking to the ceiling above the ceiling and from reducing ventilation efficiency.

Further, since the second packing with which the lower end of the slide frame abuts is provided on the inner surface of the decorative grill, leakage of room air and deterioration of ventilation efficiency are prevented even if the accuracy of the opening of the ceiling is poor. it can.

Further, since the inwardly bent portion is formed at the lower end of the main body and the third packing is provided at 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 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 an exploded perspective view of the duct ventilation fan of the first embodiment.

FIG. 3 is a side view showing a state where the duct ventilation fan of the first embodiment is tilted.

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

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

FIG. 6 is a side view showing a state in which the ventilation fan for the duct is tilted.

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

[Explanation 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)

[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, the slide frame being internally provided on the suction side of the main body and vertically slidably engaged with the main body; and a decorative grill detachably provided on the slide frame so as to cover the suction port. A duct ventilation fan provided with a first packing that closes a gap with the slide frame on the inner circumference of the section. 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 duct ventilation fan 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 that abuts an inner surface of the main body is provided at an upper end portion of the slide frame.