JPH06129684A - Ventilation fan - Google Patents

Abstract

PURPOSE:To furnish a ventilation fan which can be fitted even to a thin wall of a house and can be fitted to the ceiling. CONSTITUTION:This ventilation fan is equipped with a tubular main body 3 of the ventilation fan having a motor 2 driving vanes 1 inside and with a shutter support frame 12 which has an opening closed by the rotation of a rotary shutter A 10 and a rotary shutter B 11 each having a plurality of fan-shaped shutter plates and which is so provided for the main body 3 as to support the rotary shutter A 10 and the rotary shutter B 11 rotatably, and it is so constructed that the rotary shutter A 10 is rotated by the force of rotation of an external rotating body 17 which is rotated by a frictional force generated with the rotation of a rotating body fixed to a shaft 13 of the motor 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilation fan mounted on an opening provided in a room wall or ceiling.

[0002]

2. Description of the Related Art In recent years, the need for ventilation has increased, and the number of cases where it is used in bathrooms, washrooms, toilets, living rooms, etc. has increased, and the type with a built-in shutter that prevents outside wind has become widespread.

A conventional ventilation fan of this type is shown in FIG.
Will be described with reference to. As shown in the figure, an electric motor 101 and a blade 1 driven by the electric motor 101 are provided inside.
02 is provided, and the pipe 1 is provided along the chamber wall 104 on the outer periphery of the end of the tubular part 103 on the blade 102 side.
A flange portion 106 that extends to the outside of the outer diameter of 05 is formed, and an orifice 108 that forms a suction port is provided in the indoor opening 107.

Then, on the outer peripheral portion of the flange portion 106,
A louver 109 that covers the indoor side opening 107 from the indoor side is attached, and a shutter support frame 111 having a wind pressure shutter 110 for preventing outside air is provided on the outdoor side of the tubular portion 103.

A vent cap 114 is attached to the opening 113 on the outdoor 112 side of the pipe 105 to prevent rainwater from entering the outdoor 112.

In the above structure, when the blades 102 are driven by the electric motor 101, the air in the room 115 is sucked, passes through the louver 109 and the orifice 108, opens the wind pressure shutter 110, and is exhausted to the outside 112.

[0007]

In such a conventional ventilation fan structure, it is necessary to make the length of the ventilation fan long in consideration of the case where the wind pressure shutter 110 is opened. There was a problem that it could not be installed in the house.

Further, since the wind pressure shutter is closed by its own weight, when it is mounted on the ceiling, the weight of the wind pressure shutter becomes larger than the force of the wind pressure, which makes it difficult to open and close the wind pressure shutter. There was a problem that it could not be installed.

The present invention solves the above problems, and an object of the present invention is to provide a ventilation fan that can be mounted on a thin wall of a house and also on the ceiling.

[0010]

In order to achieve the above object, a ventilation fan of the present invention has a main body of a cylindrical ventilation fan having an electric motor for driving the blades therein and a rotary fan having a plurality of fan-shaped shutter plates. A dynamic shutter and an opening that opens and closes by the rotation of the rotary shutter, rotatably supports the rotary shutter, and is fixed to a shutter support frame provided on the main body and one end of a shaft of the electric motor. And a rotating body that is rotated by frictional force associated with the rotation of the rotating body. The rotating shutter is rotated by the rotating force of the external rotating body.

[0011]

According to the present invention, when the ventilation fan is operated, the rotating body is rotated by the electric motor, and the external rotating body is rotated by the frictional force associated with this rotation. Ventilation is performed by rotating a certain range to open the opening of the shutter support frame to form a ventilation path, and when the operation of the ventilation fan is stopped, the rotating shutter returns to its original state and the ventilation path is closed.

Further, since opening and closing of the ventilation passage by the rotating shutter rotates about the shaft, it is not necessary to lengthen the entire length of the ventilation fan.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
Will be described with reference to. As shown in the figure, a cylindrical ventilation fan main body 3 having an electric motor 2 for driving the blades 1 inside.
On the outer periphery of the end portion of the main body 3 on the blade 1 side, along the wall portion 5 in which the pipe 4 forming the opening is embedded,
A flange portion 6 is formed that extends to the outside from the outer diameter of, and an orifice 8 that forms a suction port is provided in the indoor opening 7.

A louver 9 for covering the indoor side opening 7 from the indoor side is attached to the outer peripheral portion of the flange portion 6.

Further, a rotary shutter A10 having a plurality of fan-shaped shutter plates radially provided, a rotary shutter B11 having a plurality of fan-shaped shutter plates radially provided, the rotary shutter A10 and the rotary shutter. The rotary shutter A1 has a plurality of fan-shaped openings 12a opened and closed by B11.
A shutter support frame 12 that rotatably and rotatably supports the shutter 0 and the rotary shutter B11 is provided at the outdoor side end of the main body 3.

The inner ring 14a is press-fitted and fixed to the outdoor side shaft portion 13 of the electric motor 2, the outer ring 14b is provided on the outer periphery of the inner ring 14a, and the inner ring 14a is located between the inner ring 14a and the outer ring 14b. An outer rotating body 17 including a rotating body 14 including a ring 14c and balls 14d for transmitting a force to the outer ring 14b, a rotating body holding plate 15, and a rotating body support frame 16 is provided.

The rotary shutter A10 is provided with a rib 18 with which the rotary member support frame 16 engages and a contact 19 with which the shutter B11 abuts, and a spring 20 for returning the rotary shutter A10 to its original position is rotated. It is provided between the pin 21 provided on the dynamic shutter A10 and the shutter pressing plate 22.

The shutter support frame 12 has a wall 12b which contacts the rotary shutter A10 and the rotary shutter B11 when the shutter is opened, and a housing which is housed when the rotary shutter A10 and the rotary shutter B11 are opened. Part 1
2c is formed.

The outdoor portion 2 of the pipe 4 has an outdoor portion 2
A vent cap 24 is attached to prevent the intrusion of rainwater from 3.

When the ventilation fan is operated in the above configuration, the electric motor 2 is driven, and a rotational force is generated in the inner ring 14a of the rotor 14 which is press-fitted and fixed to the outdoor side shaft portion 13 of the electric motor 2, and the rotational force meets the ring 14c. Then, the rotating body support frame 16 to which the rotating body 14 is fixed rotates by being transmitted to the outer ring 14b, the rib 18 provided on the rotating shutter A10 is pushed, and the rotating shutter A10 rotates.

Then, the contact 19 provided on the rotary shutter A10 contacts the rotary shutter B11, and the rotary shutter B11 also rotates together with the rotary shutter A10, and eventually contacts the wall 12b provided on the shutter support frame 12. Contact, storage 12
The rotary shutter A10 and the rotary shutter B11 are housed in c, the opening 12a provided in the shutter support frame 12 is opened to form a ventilation path, and the air inside the room is ventilated to the outside 23 by the blade 1. Become.

When the operation of the ventilation fan is stopped, the electric motor 2 is stopped, the rotational force applied to the rotating body supporting frame 16 is lost, and the rotating force for the rotary shutter A10 supported by the rotating body supporting frame 16 is reduced. When the rotary shutter A10 disappears, the rotary shutter A10 is put into a no-load state, and the rotary shutter A10 is contracted by the spring 20 provided between the shutter pressing plate 22 and the rib 21 provided on the rotary shutter A10.
Rotates so as to return to the original position, and the rotary shutter A1
0 hooks the wall 11a provided on the rotary shutter B11,
The rotary shutter B11 is also returned to the original position to close the opening 12a of the shutter support frame 12, and the ventilation passage of the ventilation fan is closed to prevent the outside air from entering.

As described above, according to the ventilation fan of the embodiment, the rotary shutter A10 and the rotary shutter B11 are rotated and the ventilation passage is opened / closed when the electric motor 2 is operated / stopped. Since it is not necessary to take a large distance in the lateral direction, the device can be made thinner.

Since mechanical power is used to open and close the shutter, it can be mounted on the ceiling. Although the number of shutters is two in the embodiment, the number of shutters is not limited to this, and a rotary body is provided at one end of the shaft of the electric motor, and the rotational force of the rotary body is mechanically driven by frictional force. However, it is needless to say that any frictional force such as a flow of liquid or air may be transmitted.

[0025]

As is apparent from the above embodiments, according to the present invention, the main body of the ventilation fan having the electric motor for driving the blades inside, the shutter support frame having the opening opened and closed by the rotary shutter, An external rotating body that is rotated by frictional force accompanying the rotation of the rotating body provided on the shaft of the electric motor is provided,
Since the rotary shutter is rotated by the rotational force of the external rotating body to open and close the ventilation passage, the axial dimension when the shutter is opened is shorter than that of the wind pressure shutter, and the thickness can be reduced. At the same time, since the shutters are opened and closed by mechanical power, it is possible to provide a ventilation fan that can be mounted on the ceiling and has a wider construction range.

[Brief description of drawings]

FIG. 1 is a sectional view showing a state in which a ventilation fan according to an embodiment of the present invention is attached to a wall portion.

FIG. 2 is an enlarged sectional view of a shutter portion of the ventilation fan.

FIG. 3 is a perspective view showing a state where the rotary shutter of the ventilation fan is opened.

FIG. 4 is a perspective view showing a state when the rotary shutter of the ventilation fan is closed.

FIG. 5 is a cross-sectional view showing a state in which a conventional ventilation fan is attached to a wall portion.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade 2 Electric motor 3 Main body 10 Rotating shutter A 11 Rotating shutter B 12 Shutter support frame 12a Opening 14 Rotating body 17 External rotating body

Claims (1)

[Claims] 1. A main body of a cylindrical ventilation fan having an electric motor for driving blades therein, a rotary shutter having a plurality of fan-shaped shutter plates, and an opening opened and closed by the rotation of the rotary shutter. Then, the rotatable shutter is rotatably supported, the shutter support frame provided in the main body, the rotating body fixed to one end of the shaft of the electric motor, and the rotating body is rotated by a frictional force accompanying the rotation of the rotating body. With an external rotating body,
A ventilation fan configured to rotate the rotary shutter by the rotational force of the external rotating body.