JPH06109296A - Ventilator - Google Patents

Abstract

PURPOSE:To provide a ventilator in which collision sound of a solenoid, etc., and thrashing sound of a shutter to be generated in a shutter switching unit can be reduced. CONSTITUTION:The ventilator comprises an openable shutter 12 provided in a front face opening to become a vent port of a louver 11 to prevent reverse flow of the atmosphere, and a shutter switching unit 13 for switching the shutter 12, wherein the unit 13 is operated by a shape memory alloy coil 13g having a unidirectional memory effect and a bias spring 13h.

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 a ventilation pipe embedded in a room wall or ceiling.

[0002]

2. Description of the Related Art In recent years, ventilation fans mounted on ventilation pipes have been increasingly used in bathrooms, washrooms, toilets, living rooms, etc. which have a high degree of airtightness due to the increased need for ventilation. Ventilation fans, which have a function of supplying and discharging the outside air together with the exhaust gas and which are provided with a shutter for preventing backflow of the outside air, are the mainstream.

A conventional ventilation fan of this type is shown in FIG.
Also, description will be made with reference to FIG. As shown in the figure,
A cylindrical portion 106 having a blade 102 driven by an electric motor 101 inside and a spring 105 crimped to an inner surface of a pipe 104 embedded in a wall portion 103 on an outer periphery, and a blade 102 of the cylindrical portion 106. The wall 10 is provided on the outer periphery of the side end.
3 is formed with a flange portion 107 extending to the outside from the outer diameter of the pipe 104, and an orifice 109 that forms a suction port is provided at the indoor opening 108.

Then, on the outer peripheral portion of the flange portion 107,
A louver 111 that covers the indoor side opening 108 from the room 110 is fitted, and a front opening serving as a ventilation port of the louver 111 is
A plurality of plate-shaped shutters 114, which are connected to solenoids 112 fixed to the flange portion 107 via levers 113 at both ends thereof, are provided to support both ends thereof. Further, a vent cap 116 having an inner diameter sufficiently larger than that of the electric motor 101 is attached to the opening of the outdoor side 115 of the pipe 104 so as to prevent rainwater from entering from the outdoor side 115.

In the above construction, the cylinder portion 106 of the ventilation fan is inserted into the pipe 104, the spring 105 provided in the cylinder portion 106 is pressed against the inner surface of the pipe 104 to attach the ventilation fan, and when the ventilation fan is operated, the solenoid 112 operates, The lever 113 is pulled up, the plurality of shutters 114 connected to the lever 113 are opened, and the electric motor 101
The blades 102 are rotated by this, and the air in the room 110 is
02 sucked by louver 111 and orifice 109
Through the vent cap 116 to the outside 115.

[0006]

In such a conventional ventilation fan configuration, when the solenoid 112 is operated, the fixed iron core 112a that constitutes the solenoid and the plunger 1 are provided.
Since a collision sound is generated due to the collision of 12b, noise may cause discomfort in a room at night or in a room where people are constantly present. Also, since the solenoid 112 operates at high speed,
Since the shutter 114 opens and closes vigorously, there is a problem that a fluttering noise is generated and discomfort is felt.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and an object of the present invention is to provide a ventilation fan capable of reducing the collision noise due to the solenoid generated when the shutter is opened and closed and the fluttering noise of the shutter.

[0008]

In order to achieve the above object, the ventilating fan of the present invention has a first means having blades driven by an electric motor inside and a pipe provided on a wall portion or the like on the outer circumference. A tubular portion provided with a spring to be crimped to the inner surface of the, a flange portion provided on the outer periphery of the blade side end portion of the tubular portion, and a louver attached to the flange portion to cover the indoor side opening of the tubular portion, A shutter that can be opened and closed to prevent backflow of outside air provided in a front opening that serves as a vent of the louver, and that the shutter is opened and closed by a shape memory alloy coil having a one-way memory effect and a bias spring. To do.

The second means is constructed such that the openable / closable shutter for preventing backflow of outside air is opened / closed by a shape memory alloy coil having a bidirectional memory effect.

[0010]

According to the present invention, since the shape memory alloy coil and the bias spring are used as the power for opening and closing the shutter, the operating speed becomes low and the unpleasant sound is generated due to the collision of the parts. Will disappear.

Further, according to the structure of the second means, since only the shape memory alloy coil is used as the power for opening and closing the shutter, the operating speed becomes slow, and the unpleasant sound due to the collision of the parts and the fluttering sound of the shutter are generated. Is eliminated, the number of parts is small, and it is possible to reduce the size of the power equipment that opens and closes the shutter.

[0012]

【Example】

(Embodiment 1) Hereinafter, a first embodiment of the present invention will be described with reference to FIG. As shown in the figure, a tubular portion 6 having blades 2 which are driven by an electric motor 1 inside, and a spring 5 which is crimped to the inner surface of a pipe 4 provided on a wall portion 3 and the like on the outer periphery, and this tubular portion. A flange portion 7 extending along the wall portion 3 to the outside of the outer diameter of the pipe 4 is formed on the outer circumference of the blade 2 side end portion of the blade 6, and an orifice 9 for forming a suction port is provided in the indoor opening portion 8. ing.

A louver 11 is mounted on the outer periphery of the flange 7 to cover the indoor opening 8 from the room 10 side. A plurality of shutters 12 for preventing backflow of outside air are provided at an opening in the front surface of the louver 11 that serves as a vent, and the shutter opening / closing device 13 attached to the flange portion 7 is connected via a lever 14 to the shutter opening / closing device 13. The shutter 12 is connected.

The shutter opening / closing device 13 is shown in FIG.
As shown in FIG. 1, a shaft 13 having a lever pulling plate 13b for pulling up the lever 14 at one end is provided in the frame 13a.
c is provided so as to be vertically movable, a spring holding plate 13d is provided at an intermediate portion of the shaft 13c, and a ceramic heater 13f connected to a power supply lead wire 13e is provided below the spring holding plate 13d.
In addition, a shape memory alloy coil 13g having a unidirectional memory effect is provided outside the shaft 13c on the lower side of the spring holding plate 13d so as to be heated by the ceramic heater 13f. The other end of 13a is provided so as to contact the lower surface of the spring holding plate 13d. On the upper side of the spring holding plate 13d, one end of the bias spring 1 is in contact with the frame 13a and the other end is in contact with the upper surface of the spring holding plate 13d.
3h is provided.

A vent cap 16 is attached to the opening of the pipe 4 on the outdoor side 15 to prevent rainwater from entering.

In the above structure, the tubular portion 6 of the ventilation fan is inserted into the pipe 4, and the spring 5 provided on the tubular portion 6 is inserted into the pipe 4.
When the ventilation fan was attached to the inner surface by pressing it and the ventilation fan was operated, the power supply lead wire 13e of the shutter opening / closing device 13 was energized, the ceramic heater 13f generated heat, and a unidirectional memory effect was given at a certain set temperature. The shape memory alloy coil 13g extends to a previously stored state, the spring holding plate 13d is pushed up, and the bias spring 13h is contracted.

When the bias spring 13h contracts, the shaft 13c to which the spring holding plate 13d is attached is pulled up, the lever 14 is pulled up by the lever pulling plate 13b, and a plurality of shutters 12 connected to the lever 14 are opened. The blade 2 starts to rotate by the electric motor 1, and the air in the room 10 is sucked by the blade 2, passes through the louver 11 and the orifice 9, and is exhausted from the vent cap 16 to the outside 15.

When the operation of the ventilation fan is stopped, the power supply lead 13e of the shutter opening / closing device 13 is de-energized, and the ceramic heater 13f stops generating heat. The shape memory alloy coil 13g provided with is changed from the previously stored state to the open state, and when the spring holding plate 13d is pushed down by the force of the bias spring 13h to return to its original state, the shaft 13c is also pulled down, and the lever pulling plate. 13b
Then, the lever 14 is lowered, the plurality of shutters 12 connected to the lever 14 are closed, and the outside air 15 is prevented from entering the room 10.

As described above, according to the ventilation fan of the first embodiment of the present invention, the shape memory alloy coil 13g having a one-way memory effect is deformed at a low speed and becomes a power, so that the collision noise of the parts is generated. It is possible to prevent the generation of the fluttering sound of the shutter and the shutter.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIG. The second embodiment is different from the first embodiment in the structure of the shutter opening / closing device, and 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, in the frame 17a of the shutter opening / closing device 17, a shape memory alloy coil 17d having a bidirectional memory effect is provided below a spring holding plate 17c provided at the end of a shaft 17b. Is provided and configured.

When the ventilation fan is operated in the above configuration, the power supply lead wire 13e of the shutter opening / closing device 17 is energized,
When the ceramic heater 13f generates heat and reaches a certain set temperature, the shape memory alloy coil 17d having a bidirectional memory effect extends to the first state which is stored in advance, the spring holding plate 17c is pushed up, and the spring is pressed. The shaft 17b to which the holding plate 17c is attached is pulled up, and the lever pulling plate 13
The lever 14 is pulled up by b, and a plurality of shutters (not shown) connected to the lever 14 are opened to perform the ventilation operation.

When power supply to the power supply lead wire 12e of the shutter opening / closing device 17 is stopped, the ceramic heater 1
When the heat generation of 3f is stopped and the temperature becomes equal to or lower than the set temperature, the shape memory alloy coil 17d having a bidirectional memory effect contracts to the second state stored in advance, and the spring holding plate 17
c is lowered, the shaft 17b is also lowered, and the lever pull-up plate 13b
, The lever 14 is lowered, and the lever 1
A plurality of shutters connected to 4 will be closed.

As described above, according to the ventilation fan of the second embodiment of the present invention, the shape memory alloy coil 17d having a bidirectional memory effect is deformed at a low speed and becomes a power, so that the collision noise between the parts is generated. It is possible to prevent the occurrence of noise and the fluttering sound of the shutter. Further, as compared with the first embodiment, the bias spring is not required, so that the number of parts can be reduced and the shutter opening / closing device can be downsized.

[0025]

As is apparent from the above embodiments, according to the present invention, the opening / closing operation of the shutter is performed by the power for expanding / contracting the shape memory alloy coil, so that the collision noise of the solenoid and the fluttering when the shutter is opened / closed. It is possible to eliminate the noise and provide a low-noise ventilation fan required at night or in a place where quietness is required.

[Brief description of drawings]

FIG. 1A is a sectional view showing a state in which a ventilation fan according to a first embodiment of the present invention is attached to a wall portion. FIG. 1B is a sectional view of a shutter opening / closing device according to the first embodiment.

FIG. 2 is a sectional view of a shutter opening / closing device according to the second embodiment.

FIG. 3 is a sectional view showing a state in which a conventional ventilation fan is attached to a wall portion.

FIG. 4 is a sectional view of the shutter opening / closing device.

[Explanation of reference numerals] 1 electric motor 2 blades 3 wall part 4 pipe 5 spring 6 cylinder part 7 flange part 8 indoor side opening 11 louver 12 shutters 13, 17 shutter opening / closing device 13g, 17d shape memory alloy coil 13h bias spring

Claims (2)

[Claims] 1. A cylindrical portion having a blade driven by an electric motor inside, a spring provided on the outer periphery with a spring crimped to the inner surface of a pipe provided in a wall portion, and the blade-side end portion of the cylindrical portion. A flange portion provided on the outer periphery of the louver, a louver attached to the flange portion to cover the indoor side opening of the tubular portion, and a freely openable and closable front air opening provided at a front opening portion serving as a ventilation port of the louver. A ventilation fan comprising a shutter and a shutter opening / closing device for opening / closing the shutter, wherein the shutter opening / closing device is operated by a shape memory alloy coil having a one-way memory effect and a bias spring. 2. The ventilation fan according to claim 1, wherein the shutter opening / closing device is constituted by a shape memory alloy coil having a two-way memory effect.