JP2573357B2 - Duct ventilation fan - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial application field) The present invention relates to a ventilation fan for a duct in which dew condensation countermeasures are taken.

2. Description of the Related Art Conventionally, in a duct ventilation fan of this type, particularly a duct ventilation fan for a bathroom, a main body frame generally disposed behind a ceiling is cooled by air behind the ceiling, and the cooled main body frame is used. When hot and humid air in the bathroom comes into contact with the inner surface of the device, dew condensation occurs, and the dripping of the dew makes the bather uncomfortable.

Therefore, by arranging a heat insulator along the inner peripheral surface of the main body frame, it is possible to prevent the high-temperature and high-humidity air from contacting the inner surface of the main body frame with a heat-insulating structure, thereby preventing the occurrence of dew condensation. it was thought.

(Problems to be Solved by the Invention) However, even in the case where the heat insulator is provided as described above, the fan is not provided with the heat insulator, but is not different from the fan, and only a suitable ventilation performance can be obtained. Had.

The present invention has been made in view of the above-described circumstances, and therefore has an object to prevent dew condensation from occurring on the inner surface of the main body frame, and to further improve ventilation performance, and to achieve a more rational operation. It is an object of the present invention to provide an excellent duct ventilation fan which can be achieved with a structure.

[Constitution of the Invention] (Means for Solving the Problems) The duct ventilation fan of the present invention has heat insulation along an inner peripheral surface portion thereof inside a main body frame having an intake port on a lower surface and an exhaust port on a side surface. A body is provided, and a double-wing fan having a wing portion on the intake side and a wing portion on the opposite side of the intake port and a motor for driving the fan are disposed, and the heat-insulating body is provided with the fan from the intake port. It is characterized in that a ventilation path is formed to ventilate the wings on the side opposite to the intake port of the fan.

In this case, the main body frame is formed in a rectangular box shape, and the heat insulator is
In the case where the outer surface is formed along the inner peripheral surface portion of the main body frame and the inner surface is formed in a casing shape surrounding the fan, the ventilation passage may be formed at a corner of the heat insulator.

In the case where the heat insulator is fixed to the main body frame by a pressing member, it is more preferable that the pressing member also serves as a member for holding a spring for attaching a decorative panel.

(Operation) According to the above means, the contact of the high-temperature and high-humidity air with the inner surface of the main body frame can be basically prevented by the heat insulating structure of the heat insulator along the inner peripheral surface of the main body frame.

And since a fan is a two-wing | blade type, the increase of an air volume can be aimed at.

Also, in this case, the wings on the intake port side of the two-wing fan draw air directly from the intake port on the lower surface of the main body frame, whereas the wings on the opposite intake port side draw air through a ventilation passage formed in the heat insulator. Since the air is sucked into the wing on the side opposite to the air inlet through the heat insulator, the contact of the hot and humid air with the inner surface of the main body frame can be more reliably prevented.

Further, the main body frame is formed in a rectangular box shape, and the heat insulator is formed in a shape in which the outer surface follows the inner peripheral surface portion of the main body frame, and the inner surface is formed in a casing shape surrounding the fan. With the one formed at the corner of the body, the ventilation path can be formed in conjunction with the so-called stealing of the heat insulator, and the material of the heat insulator can be reduced and the weight can be reduced.

In addition, if the heat insulator is fixed to the body frame by a holding member, and the holding member also serves as a member for holding a spring for attaching a decorative panel, the cost can be reduced by sharing parts. And improvement in assemblability can be achieved.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

First, in FIG. 2 showing a state in which a ventilation fan for a duct is attached, a main body frame 3 attached to a ceiling 1 via a wooden frame 2 is made of, for example, plastic, and an intake port 4 formed by an opening in the entire surface on the lower surface. A connecting plate having a rectangular box shape having an exhaust port 5 with a rectangular hole as shown in FIG. 3 on a side surface portion (right side portion in the drawing), and having an exhaust hole 6 in the exhaust port 5 The duct 8 shown in FIG.

An upper heat insulator 9 made of, for example, styrofoam and a lower heat insulator 10 also made of styrofoam are provided in the main body frame 3. Along the inner upper surface and the upper part of the peripheral side surface, the lower heat insulator 10
Is along most of the rest of the peripheral side. Both these insulators
A motor mounting plate 11 is provided between 9 and 10, and the motor mounting plate 11 is fixed to the main body frame 3 by screwing it to a motor fixing bracket 12 disposed on the main body frame 3. A motor 14 is attached to the motor mounting plate 11 by screwing it to a bell mouth-shaped vent 13 at the center thereof, and a main wing 15a on the intake port 4 side and an anti-intake A double-wing fan 15 having a sub-wing 15b on the mouth 4 side is mounted. Here, of the two heat insulators 9, 10, the lower heat insulator 10 has an inner surface formed in a casing shape surrounding the fan 15 as shown in FIGS. 3 is formed in a shape following the inner peripheral surface portion. And, in each of the upper triangular corners, a ventilation passage 16 which opens vertically is formed, and the motor mounting plate 11 does not block it, for example, in a shape only slightly larger than the planar shape of the casing. It has established. In addition, the lower heat insulator 10 has a suction port at the bottom
17 is formed, a concave ridge 18 is formed on the outer surface, and this is fitted into a convex ridge 19 formed on the inner surface of the main body frame 3, and furthermore, the lower edge of the outer surface is formed almost entirely around the periphery. A portion 20 is formed, which is pressed against the inner peripheral surface of the main body frame 3 and crushed.

Under the lower heat insulator 10, the inlet 4 of the body frame 3 is
A long holding member 21 is screwed and attached to the ridge portion 19, and thereby the lower heat insulating body 10 is pressed and fixed to the main body frame 3 from below. Also, the holding member 21
, A decorative panel 23 for covering the intake port 4 of the main body frame 3 from below the ceiling 1 is attached by the spring 22. In addition, in the decorative panel 23,
A large number of ventilation holes 24 are formed over the entire area.

By the way, in the case of the configuration as described above, if the motor 14 is started, the double-wing fan 15 is driven to rotate,
The main wing portion 15a on the side of the intake port 4 allows air in a bathroom or the like under the ceiling 1 to pass through the vent hole 24 of the decorative panel 23 from the intake port 4 as shown by an arrow A in FIG. Suction port
The air is sucked into the lower heat insulator 10 through 17, and is discharged from the exhaust port 5 to the outside through the exhaust hole 6 of the connecting plate 7 and the duct 8. At the same time, the air in the bathroom and the like under the ceiling 1 is also discharged from the ventilation hole 24 of the decorative panel 23 through the sub-insulating member 10b by the sub-wing portion 15b on the side opposite to the intake port 4 as shown by an arrow B in FIG. The air is sucked into the lower heat insulator 10 through the ventilation passages 16 in the inside and the ventilation holes 13 of the motor mounting plate 11, and is similarly discharged from the air outlet 5 to the outside through the exhaust holes 6 of the connection plate 7 and the duct 8.

During the operation or the stop of the operation, the high-temperature and high-humidity air in the bathroom and the like under the ceiling 1 that has entered the main body frame 3 basically includes the upper and lower air along the inner peripheral surface of the main body frame 3. Thermal insulation 9,
The heat insulating structure 10 prevents the inner surface of the main body frame 3 from being touched, thereby preventing dew condensation on the inner surface of the main body frame 3.

In addition, the ventilation operation can be performed by both the intake and exhaust by the main wing portion 15a and the intake and exhaust by the sub wing portion 15b of the double-wing fan 15 as described above, and is a conventional one-wing type. Operation with a larger air flow than with a fan can be performed, and an improvement in ventilation performance can be achieved. Further, in this case, the cooling effect of the motor 14 by the wind can be improved, and the life thereof can be extended.

The main wing portion 15a of the double-wing fan 15 draws air from the intake port 4 of the main body frame 3 as it is, while the sub wing portion 15b
Is designed to take in air through a ventilation passage 16 formed in the lower heat insulator 10, and the intake air to the sub wing portion 15b is made to pass through the lower heat insulator 10, so that the intake air is Contact with the body frame 3
Dew condensation on the inner surface can be more reliably prevented.

On the other hand, the main body frame 3 is formed in a rectangular box shape, and the lower heat insulator 10 is formed.
However, the outer surface is formed in a shape following the inner peripheral surface portion of the main body frame 3, and the inner surface is formed in a casing shape surrounding the fan 15.
By forming the ventilation path 16 at the corner portion of the lower heat insulator 10, the ventilation path 16 can be formed together with the so-called stealing of the lower heat insulator 10, and the material of the heat insulator can be reduced and the weight can be reduced. Can be achieved.

In addition, the lower heat insulator 10 is fixed to the main body frame 3 by the pressing member 21, and the pressing member 21 is a decorative panel.
By also serving as a member that holds the spring 22 for mounting 23, it is possible to achieve the common use of parts, thereby achieving the effects of cost reduction and improved assemblability.

In addition, by dividing the heat insulator into the upper heat insulator 9 and the lower heat insulator 10, the motor mounting plate 11 can be easily assembled,
Further, a convex portion 20 is formed almost all around the lower edge portion of the outer surface of the lower heat insulator 10 and is pressed against the inner peripheral surface portion of the main body frame 3, so that the inner surface of the main body frame 3 and the lower heat It is possible to prevent any intrusion of high-temperature and high-humidity air into the outer surface of the body 10, and furthermore, it can absorb variations in dimensions between the main body frame 3 and the lower heat insulator 10 due to the pressure contact, thereby facilitating assembly. The effect can be obtained.

As mentioned above, although one Example of this invention was described, this invention is not limited to it. In particular, the thing of the said Example in which the lower heat insulator 10 follows most of the peripheral side part of the inner peripheral surface part of the main body frame 3 is attached. In such a case, the upper heat insulator 9 may not be provided only when used in a place where the air temperature behind the ceiling 1 is relatively high.

In addition, the present invention can be appropriately modified and implemented without departing from the gist.

[Effects of the Invention] The present invention is as described above, and has the following effects.

In the ventilation fan for a duct according to claim 1, a heat insulator along an inner peripheral surface portion is provided inside a main body frame having an intake port on a lower surface and an exhaust port on a side surface, and a heat insulator on the intake port side is provided. A two-sided fan having a wing portion and a wing portion on the side opposite to the intake port and a motor for driving the fan are disposed, and ventilation is provided from the intake port to the wing portion on the side opposite to the intake port of the fan in the heat insulator. Since the ventilation path is formed, the ventilation path can be improved by itself without causing dew condensation, even in the ventilation path as well as the entire inner surface of the main body frame.

In the ventilation fan for a duct according to claim 2, in the above configuration, the main body frame is formed in a rectangular box shape, and the heat insulator has a shape in which an outer surface is attached to an inner peripheral surface portion of the main body frame, and a casing shape in which the inner surface surrounds the fan. Since the ventilation path is formed at the corner of the heat insulator, the ventilation path can be formed together with the so-called stealing of the heat insulator, and the material of the heat insulator can be reduced and the weight can be reduced. Can be planned.

In the duct ventilation fan according to claim 3, in the above configuration, the heat insulator is fixed to the main body frame by a pressing member,
Since the holding member also serves as a member for holding a spring for attaching a decorative panel, parts can be shared, and effects such as reduction in cost and improvement in assemblability can be obtained.

[Brief description of the drawings]

The drawings show an embodiment of the present invention, and FIG.
FIG. 2 is a longitudinal sectional view taken along the line II of FIG. 2, FIG. 2 is a longitudinal sectional view taken along the line II-II, FIG. 3 is an exploded perspective view, and FIG. In the drawing, 3 is a main body frame, 4 is an intake port, 5 is an exhaust port, 10 is a lower heat insulator (heat insulator), 14 is a motor, 15 is a fan, 15a is a main wing portion (wing portion on the intake port side), 15b Is the sub wing (the wing on the side opposite to the intake port), 16 is the ventilation path, 21 is the holding member, 22 is the spring,
23 shows a decorative panel.

Claims (3)

(57) [Claims] A heat insulator is provided along an inner peripheral surface of a body frame having an intake port on a lower surface and an exhaust port on a side surface. A double-wing fan having a mouth-side wing portion and a motor for driving the fan, wherein ventilation is provided in the heat insulator from the suction port to a wing portion on a side opposite to the suction port of the fan. A duct ventilation fan characterized by forming a road. 2. The body frame is formed in a rectangular box shape, and the heat insulator is
2. The air flow path is formed at a corner portion of the heat insulating body, wherein the outer surface is formed in a casing shape surrounding the fan, and the inner surface is formed in a casing shape surrounding the fan. Duct ventilation fan. 3. A ventilation fan for a duct according to claim 1, wherein the heat insulator is fixed to the main body frame by a pressing member, and the pressing member also serves as a member for holding a spring for attaching a decorative panel.