JPH06229596A - Ventilator - Google Patents

Abstract

PURPOSE:To prevent fuming and firing due to unusual heating of a motor. CONSTITUTION:A ventilator comprises life judging means 10 for judging completion of life when an operation time of a motor 1 for driving vanes 2 reaches a specific period of time, and stop means 11 for forcedly changing an energizing condition of the motor 1 into a deenergizating condition when completion of life is judged by the life judging means 10.

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 ventilating indoor air provided with means for preventing smoke and ignition.

[0002]

2. Description of the Related Art In recent years, a mainstream of a ventilation fan is one in which a ventilation fan main body is provided at a high place such as a ceiling and operated by a switch mounted on a wall.

A conventional ventilation fan of this type is shown in FIG.
Will be described with reference to. As shown in the figure, a ventilation fan main body 103 provided with blades 102 driven by a motor 101 is provided on a ceiling surface 104, and a power supply 1 is provided on a wall portion 105.
The switch 107 connecting the electric circuit of the motor 101 and the electric circuit of the motor 101 is provided.

Then, the switch 107 is turned on to operate the ventilation fan in the energized state in which the power source 106 is connected to the motor 101, and the switch 101 is turned off to deactivate the motor 101 to stop the operation of the ventilation fan. It was

[0005]

In such a conventional ventilation fan, even when the ventilation fan has reached the end of its life and the bearing portion of the motor 101 has become stuck and cannot rotate, it is often not noticed, and when it is continuously used as it is. Motor 101
There was a problem with the danger of smoke, ignition and fire.

SUMMARY OF THE INVENTION The first object of the present invention is to provide a highly safe ventilation fan capable of preventing smoke and ignition due to abnormal heating of a motor.

A second object of the present invention is to provide a ventilation fan which can inform the user of the end of life.

[0008]

In order to achieve the above first object, the ventilating fan of the present invention has a first means for controlling a motor for driving blades provided inside the body of the ventilating fan, and an operating time of this motor. The service life measuring means for measuring, a service life determining means for determining the service life when the operating time of the motor reaches a specified time, and a stopping means for forcibly turning off the energized state of the motor are provided. The stop means is activated when the determination means determines that the life has expired.

Further, in order to achieve the second object, the second
The means is provided with an alarm means for issuing an alarm when the life determining means determines that the life has expired.

[0010]

According to the present invention, when the ventilating fan is judged to have reached the end of its life, the energized state of the motor is forcibly de-energized by the construction of the above-mentioned first means, and smoke and ignition due to abnormal heating of the motor are prevented. Becomes

Further, according to the constitution of the second means, when it is judged that the exhaust fan has reached the end of its life, an alarm is issued to inform the user that the exhaust fan has reached the end of its life.

[0012]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIGS.

As shown in the figure, a box-shaped ventilation fan main body 3 provided with blades 2 driven by a motor 1 is provided in a ceiling portion 4, one of which is connected to a power source 6 and the other of which is a wall portion 5. Is provided with a switch 8 connected to a control unit 7 for controlling energization of the motor 1.

The control unit 7 has a life measuring means 9 for measuring the operating time of the motor 1 and a life judging means 1 for judging the life when the operating time of the motor 1 reaches a specified time.
0 and stop means 11 for forcibly turning the energized state of the motor 1 to the non-energized state when the life is determined by the life determining means 10.

In the above structure, every time the switch 8 is turned on and the motor 1 is energized, the life measuring means 9 provided in the control unit 7 measures the operating time of the motor 1 and the life time of the ventilation fan (for example, 20,000 hours to 30,000 hours), the life judging means 10 judges that the life has ended, and the stopping means 11
As a result, the energized state of the motor 1 is forcibly set to the non-energized state.

As described above, according to the ventilation fan of the first embodiment of the present invention, when the life of the ventilation fan reaches the end of its life, the life judging means 1
Since 0 is determined to be the life, and the stop means 11 forcibly brings the motor 1 into the non-energized state, it is possible to prevent smoking and ignition due to abnormal heating of the motor 1.

(Second Embodiment) A second embodiment of the present invention will be described below with reference to FIGS. 3 and 4. In addition,
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, the control unit 7 includes an alarm means 12 for issuing an alarm when the life determining means 10 determines that the life has expired.
It is provided in a.

In the above structure, every time the switch 8 is turned on to bring the motor 1 into the energized state, the life measuring means 9 provided in the control section 7a measures the operating time of the motor 1 and reaches the life time of the ventilation fan. Then, the life judging means 10 judges that the life of the exhaust fan has expired, and the alarm means 12 informs the user that the exhaust fan has reached the end of life. When the user knows that the exhaust fan has reached the end of life, the switch 8 is turned off to turn off the motor 1. You can stop driving.

As described above, according to the ventilation fan of the second embodiment of the present invention, when the life of the ventilation fan is reached during operation, the life determining means 1
Since it is determined that 0 is the life, the warning means 12 informs the user and the operation of the ventilation fan can be stopped, so that smoking / ignition due to abnormal heating of the motor 1 can be prevented.

Although the alarm means 12 is used in place of the stopping means in the second embodiment, it goes without saying that the two means may be used together and there is no difference in their action and effect.

[0022]

As is apparent from the above embodiments, according to the present invention, a life judging means for judging the life when the operating time of the motor for driving the blade reaches a specified time, and this life judging means. Since the stop means for forcibly energizing the motor to the non-energized state is provided when it is determined that the motor has reached the end of life, it is possible to provide a highly safe ventilation fan that can prevent smoke and ignition due to abnormal heating of the motor.

Further, since the alarm means is provided so as to be activated when the life of the ventilation fan reaches the end of life, the user can know the life of the ventilation fan and can arrange the replacement of the motor and the like in advance. It will be possible to prevent ignition.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a ventilation fan according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of the ventilation fan of the first embodiment.

FIG. 3 is a diagram showing a schematic configuration of a ventilation fan of the second embodiment.

FIG. 4 is a block diagram showing a configuration of a ventilation fan of the second embodiment.

FIG. 5 is a diagram showing a schematic configuration of a conventional ventilation fan.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 motor 2 blades 3 ventilation fan main body 9 life measuring means 10 life determining means 11 stopping means 12 alarm means

Claims (2)

[Claims] 1. A motor for driving blades provided inside a main body of a ventilation fan, a life measuring means for measuring an operating time of the motor, and a life judged to be a life when the operating time of the motor reaches a specified time. An exhaust fan comprising: a determination unit and a stop unit for forcibly turning off the energized state of the motor, and activating the stop unit when the life is determined by the life determination unit. 2. The ventilation fan according to claim 1, further comprising alarm means for issuing an alarm when the life determining means determines that the life is reached.