JP2753077B2 - Fan for pipe - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe fan used by being inserted into a ventilation pipe.

2. Description of the Related Art In recent years, pipe fans have been used for ventilation of toilets, bathrooms, and living rooms due to their ease of installation. In many cases, the pipe fan is provided with a shutter for preventing backflow due to outside wind.

The general structure of a conventional pipe fan having such a backflow prevention shutter will be described below with reference to FIGS. 3 and 4. FIG.

Inside the motor 32 and the blades driven by the motor 32
The cylindrical portion 31 having the outer peripheral portion 33 has a plurality of springs 36 which press the inner peripheral surface thereof when inserted into the pipe 35 embedded in the chamber wall 34 at the outer peripheral portion. A flange portion 39 is formed on the outer periphery of the blade portion 33 side end of the cylindrical portion 31 so as to extend from the outer diameter of the pipe 35 along the chamber wall 34 to the outside, and an orifice forming a suction port is formed in the indoor side opening 37. Forty are provided.
Further, a louver 41 that covers the indoor opening 37 from the indoor side is fitted to an outer peripheral portion of the flange portion 39. And the cylinder
An automatic air pressure type shutter 43 for backflow prevention is attached to the outdoor opening 42 of the 31.

In the above configuration, the cylindrical portion 31 is inserted into the pipe 35,
It is fixed to the inner peripheral surface by a spring 36. And the air in the room 38 is sucked into the blades 33 driven by the electric motor 32,
Pass through louver 41 and orifice 40, shutter by wind pressure
43 is pushed up and exhausted to the outside 44. A vent cap 45 is attached to the outdoor opening of the pipe 35 to prevent rainwater from entering the outdoor 44.

In such a conventional configuration, since the shutter 43 provided in the outdoor opening 42 of the cylindrical portion 31 is rotated and opened to the outdoor 44 side by wind pressure, the outdoor opening in the pipe 35 is opened. 42 and vent cap
A distance must be provided so that the shutter 43 does not hit the vent cap 45, and the size of the pipe 35 in the ventilation direction becomes longer, and the thickness of the room wall 34 seen in recent housing is reduced. It may not be possible to cope with the tendency to thin, and since the shutter 43 is present in the pipe 35, the effective ventilation opening area inside the pipe 35 is reduced, and the resistance to ventilation is reduced.
It is a cause of a decrease in ventilation air volume and an increase in noise, and furthermore, when the external wind pressure is high, the shutter 43 does not open sufficiently, or when the external wind pressure changes intermittently, it flaps. The opening of the shutter 43 was unstable.
Further, for example, in a case where the shutter 43 is attached to a humid room such as a bathroom and left without operating, the shutter 43 is driven by the electric motor 32.
Since the motor 32 is located closer to the outside 44, the electric motor 32 is exposed to the humid air in the room 38, and the moisture causes deterioration of insulation and deterioration of rust prevention.

The present invention has been made to solve these problems, and the size of the pipe in the ventilation direction may be short, and a shutter having a stable opening without reducing the effective ventilation opening area in the pipe is provided. It is another object of the present invention to provide a pipe fan that can protect an electric motor from indoor humidity.

Means for Solving the Problems To achieve the above object, the pipe fan of the present invention is inserted into a pipe inserted and arranged in an opening provided in a room wall or a ceiling, and is driven by an electric motor and the electric motor. A tubular portion having a blade inside the tubular portion, a flange portion extending from the outer diameter of the pipe along the chamber wall or ceiling to the outer periphery of the blade side end of the tubular portion, and detachably attached to the flange portion. A louver fixed to the housing to cover the indoor side opening of the cylindrical portion from the indoor side, a plurality of shutters provided at a front opening serving as a ventilation port of the louver and opened and closed in conjunction with each other, and shutter driving means for opening the shutter Wherein the shutter drive means has a drive shaft provided on the flange portion, the drive shaft linearly moving in the same direction as the side end of the shutter moves when the shutter is opened and closed, and the drive shaft is A pipe fan is connected to the shutter and urges the shutter in the opening direction by energization.

According to the present invention, since the shutter is attached to the louver located on the indoor side according to the above configuration, the dimension of the pipe in the direction in which the pipe is inserted may be short, and the shutter opens and closes in conjunction with a plurality of sheets. Since it is arranged outside the pipe, the entire size thereof can be made sufficiently larger than the inner diameter of the cylindrical portion, and a large open area can be obtained when the pipe is opened. Is provided on the flange portion, and the direction of the linear motion of the drive shaft is the same as the direction of movement of the shutter at the side end of the shutter when the shutter is opened and closed. The shutter does not decrease and the opening and closing operation of the shutter becomes stable, and when the pipe fan stops, the humid air on the indoor side drifts around the electric motor. Will be blocked.

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

As shown in the figure, a cylindrical portion 1 having an electric motor 2 and a blade 3 driven by the electric motor 2 is provided inside a pipe 5 which is inserted into an opening provided in a chamber wall 4 on its outer peripheral surface. A plurality of springs 6 which press the inner peripheral surface when inserted
have. Further, a flange portion 9 is formed on the outer periphery of the end of the cylindrical portion 1 on the blade 3 side, extending along the chamber wall 4 from the outer diameter of the pipe 5 to the outside, and an orifice forming a suction port is formed in the indoor side opening 7. Ten are provided. Further, a louver 11 that covers the indoor opening 7 from the indoor side is fitted to an outer peripheral portion of the flange portion 9. In addition, a plurality of shutters 14 are provided at both ends of the front opening serving as a vent of the louver 11.
Are rotatably supported, and are configured to be opened and closed in an interlocked manner by a connecting plate 14a movably connecting respective side end portions. Further, a lever 13 protrudes from the connecting plate 14a toward the flange portion 9. A solenoid 12 serving as shutter driving means is provided at a position where the lever 13 on the flange portion 9 faces, and the direction of the linear motion of the drive shaft 12a of the solenoid 12 is made the same as the direction in which the lever 13 moves when the shutter 14 is opened and closed. Thus, the drive shaft 12a is directly engaged with and connected to the lever 13. A vent cap 16 whose inner diameter is sufficiently larger than the outer diameter of the motor is attached to the outdoor opening of the pipe 5 to prevent rainwater from entering the outdoor 15.

In the above configuration, the tubular portion 1 is inserted into the pipe 5 and fixed to the inner peripheral surface thereof by the spring 6. When the pipe fan is operated, the solenoid 12 is operated to pull up the lever 13, the plurality of shutters 14 connected to the lever 13 are opened, and the blades 3 start rotating by the electric motor 2, and the indoor The air 8 is sucked by the blades 3, passes through the louver 11 and the orifice 10, and is exhausted from the vent cap 16 to the outside 15.

As described above, according to the embodiment, since the outer diameter of the motor 2 is sufficiently smaller than the inner diameter of the vent cap 16, when the thickness of the chamber wall 4 is small, as shown in FIG. Can be installed so as to enter the interior of the room, and it is possible to cope with the recent tendency of the room wall 4 to be thin. And
The shutter 14 is configured to be opened in conjunction with a plurality of shutters, and is located on the room 8 side outside the pipe 5, so that the effective ventilation opening area inside the pipe 5 is not reduced and the shutter 14 is large. Also, it can be made sufficiently larger than the inner diameter of the cylindrical portion 1, so that the opening area at the time of opening can be increased and the ventilation resistance can be reduced, and a decrease in ventilation air volume and an increase in noise value can be prevented. , A solenoid 12 is provided at a position facing the lever 13 on the flange portion 9,
With the drive shaft 12a in the same direction as the direction in which the lever 13 moves,
Because it is directly connected to the lever 13, this configuration can also prevent a decrease in ventilation air volume and an increase in noise value,
Also, unlike the general connection in which the shutter drive means and the shutter are connected via a wire or the like, the connection to the solenoid 13 is different from the connection with a slack due to the convenience of assembly. Thus, the shutter 14 opens and closes responsively, the opening and closing operation is stabilized, and the shutter 14 is not affected by the external wind pressure. Furthermore, even if the shutter 14 is installed in a humid room such as a bathroom and left without operation, the shutter 14 is located closer to the room 8 than the electric motor 2 so as to block moisture from drifting around the electric motor 2. It is possible to prevent the insulation performance of the electric motor 2 from deteriorating due to moisture and the rust prevention ability.

Effect of the Invention As is apparent from the above embodiments, according to the present invention, it is possible to reduce the size of the pipe in which the tubular portion of the pipe fan is inserted in the ventilation direction, and to cope with a thin chamber wall. Since the effective ventilation opening area in the interior is not reduced and the opening area when the shutter is opened can be made sufficiently large, the problems of reduction in ventilation air volume and increase in noise value can be solved. Immediately opens and closes in response to power interruption to the means, and has excellent responsiveness, its opening operation is stable, and the louver vent is reliably opened without being affected by external wind pressure. An effect is obtained that the electric motor can be protected from indoor humidity by the shutter provided in the louver.

[Brief description of the drawings]

1 is a sectional view showing a pipe fan according to an embodiment of the present invention, FIG. 2 is a front view thereof, FIG. 3 is a sectional view of a conventional pipe fan, and FIG. 4 is a front view thereof. DESCRIPTION OF SYMBOLS 1 ... cylindrical part, 2 ... electric motor, 3 ... blade, 5 ... pipe, 7 ... indoor side opening, 9 ... flange part, 11 ... louver, 12 ... solenoid, 12a ... drive shaft, 14 ... Shutter.

Claims (1)

(57) [Claims] 1. A tubular part which is inserted into a pipe inserted and disposed in an opening provided in a room wall or a ceiling and has an electric motor and a blade driven by the electric motor therein, and a blade side of the tubular part. A flange portion extending from the outer diameter of the pipe along the chamber wall or ceiling to an outer periphery of an end portion, and a louver fixed removably to the flange portion to cover an indoor opening of the cylindrical portion from the indoor side. And a plurality of shutters provided at a front opening serving as a ventilation port of the louver and opened and closed in conjunction with each other, and shutter driving means for opening the shutter, wherein the shutter driving means is provided on the flange portion, A drive shaft that linearly moves in a direction in which a side end of the shutter moves when the shutter is opened and closed; and a drive shaft that is connected to the shutter and urges the shutter in an opening direction by energization. Fan-flops.