JPH063320Y2 - Blower - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a blower device that blows air based on a human detection signal from a human detection sensor.

(Prior Art) In recent years, an air purifier, which is an example of an air blower, is provided with a person detection sensor that detects the presence of a person, and drives a blower motor based on a person detection signal from the person detection sensor. It is equipped with an automatic driving function. That is,
When there is a person in the room, the person detection sensor is in the detection state and air is automatically blown, whereas when there is no person in the room, the person detection sensor is in the non-detection state and the air is stopped. Therefore, this makes it possible to prevent a problem that the air is blown even when there is no person.

(Problems to be solved by the invention) However, in the above-described conventional one, when the person, for example, goes to bed with the automatic driving set, the person who is sleeping is detected by the human detection sensor and the ventilation is automatically performed. Will be executed. For this reason, the motor is driven even when the air in the room is relatively clean and it is not necessary to blow air, and power is wastefully consumed.

Therefore, an object of the present invention is to provide an air-blowing device capable of disabling an automatic driving function that blows air based on a detection state of a human detection sensor while sleeping, thereby preventing a wasteful driving. To provide.

[Configuration of Device] (Means for Solving the Problem) The air blower of the present invention has a human detection sensor that detects the presence of a person and outputs a human detection signal, and the ambient brightness is below a set level. When an optical sensor that outputs a dark detection signal is provided, an automatic operation for driving a fan driving motor based on a human detection signal from the human detection sensor is performed, and the light is output during the automatic operation. An operation control device is provided for invalidating the input of the human detection signal only when the dark detection signal is output from the sensor.

In addition, a timer circuit for performing a timer operation for a set time is provided, and the operation control device drives the timer circuit when a dark detection signal is output from the optical sensor, and the person detection described above is performed during the timer operation. The signal input invalidating function may be stopped.

(Operation) When the human detection sensor detects the presence of a person, it outputs a human detection signal. Then, the operation control device executes the automatic operation of driving the fan driving motor based on the person detection signal. Then, when the ambient brightness becomes equal to or lower than the set level, the photosensor outputs a darkness detection signal. In this case, the operation control device invalidates the input of the human detection signal while the automatic detection is being performed and the dark detection signal is being output from the optical sensor. Therefore, since the dark detection signal is output from the optical sensor when the room lighting is turned off while sleeping, the fan driving motor is not driven while sleeping.

Further, when the timer circuit is provided, the operation control device drives the timer circuit when the dark detection signal is output from the optical sensor, and invalidates the input of the human detection signal from the human detection sensor while the timer is operating. Turn into. Therefore, the automatic operation by the human detection sensor will not be immediately stopped when the indoor lighting is turned off to sleep.

(Embodiment) An embodiment in which the present invention is applied to an air purifier will be described below with reference to the drawings.

First, in FIG. 2 and FIG. 3 showing the mechanical structure of the air purifier, 1 is an outer box, and an intake port 2 consisting of a large number of slits is formed in the front part thereof, and at the top part thereof. Has an exhaust port 3 formed of a plurality of slits. Further, inside the outer box 1, a fan 4 and a variable speed type motor 5 for rotationally driving the fan 4 are arranged. A filter 6 is arranged in the outer box 1 at a position on the rear surface side of the intake port 2. Further, on the upper part of the outer case 1, there is provided an operation unit 7 including various switches including an automatic operation setting switch. Reference numeral 8 denotes a human detection unit provided on the front surface of the outer box 1, which mainly includes a human detection sensor 10 arranged so as to face the front through a cover 9. Reference numeral 11 denotes a gas concentration detection unit provided on the front surface of the outer box 1, which is a gas sensor 13 arranged so as to communicate with the outside via a communication unit 12 including a plurality of slits.
(See FIG. 1). Reference numeral 14 is an optical sensor provided on the front surface of the outer box 1.

Now, in FIG. 1 showing the electrical configuration in functional blocks, each switch provided in the operation section 7 is connected to the operation control device 15, and a signal indicating the operation content is given in response to the operation thereof. It is given to the operation control device 15. Reference numeral 16 denotes a display unit including, for example, a plurality of LEDs, which displays the contents set by the operation unit 7 and also displays the operating state according to the progress of the driving. The motor 5 is connected to the operation control device 15 via a drive circuit 17, and when a low speed drive signal is given from the operation control device 15 to the drive circuit 17, the motor 5 rotates at a low speed and an intermediate speed drive is performed. When a signal is given, the motor 5 rotates at an intermediate speed, and when a high speed drive signal is given, the motor 5 rotates at a high speed. In this case, when the motor 5 rotates at a low speed, a weak blast operation is performed, when the motor 5 rotates at an intermediate speed, a strong blast operation is performed, and when the motor 5 rotates at a high speed, a rapid blow operation is performed. Blower operation is performed. The human detection sensor 10 detects infrared rays emitted from a person, and detects the human detection signal S in the detection state.
a is output to the operation control device 15. The optical sensor 14 detects ambient brightness, and outputs a darkness detection signal Sb to the operation control device 15 when the brightness is below a set level. The gas sensor 13 outputs a pollution detection signal Sc having a signal level corresponding to the degree of air pollution to the operation control device 15. When driven by the operation control device 15, the timer circuit 18 executes a timer operation for, for example, 30 minutes from that timing, and outputs a timer over signal Sd to the operation control device 15 when the timer operation ends.

The operation control device 15 is configured to include a microcomputer, and stores a program stored in advance, the operation unit 7, the sensors 10, 13, 14 and the timer circuit 1.
The display content of the display unit 16 is changed on the basis of each signal from 8 and the drive circuit 17 is driven at a low speed at a predetermined timing.
Outputs intermediate and high speed drive signals.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. 4 and the time chart of FIG. 5 showing the contents of the program for automatic operation by the operation control device 15.

When the automatic operation is not set, the automatic operation control device 15 determines “NO” in step S ₁ and proceeds to step S ₂ to execute the manual operation. On the other hand, when it is desired to start the automatic operation of driving the motor 5 based on the human detection state of the human detection sensor 10, the operation unit 7 is operated to set the automatic operation. Then, the operation control device 1
In step 5, the process proceeds from step S ₁ to step S ₃ to input the contamination detection signal Sc from the gas sensor 13. At this time, when the indoor air is clean and the human detection sensor 10 is not in the human detection state (time t _{0 to} t _{1 in} FIG. 5), the process proceeds to step S ₇ to stop the output of the drive signal. . Therefore, since the motor 5 is not driven, the blowing is stopped. Then, when the indoor air becomes dirty due to smoking, for example, the signal level of the contamination detection signal Sc from the gas sensor 13 rises as shown in FIG. 5 (c). Then, when the signal level of the pollution detection signal Sc exceeds the first set level (time t _{1 in} FIG. 5), the operation control device 15 outputs the signal of the pollution detection signal Sc input in step S ₃ in step S ₅ . level outputs an intermediate speed drive signal to the drive circuit 17 proceeds to step S ₈ is determined that greater than the first set level. As a result, the motor 5 rotates at an intermediate speed, and due to the suction force of the fan 4 accompanying this, the air in the room is sucked from the intake port 2 and the sucked air is discharged from the exhaust port 3 to the room. At this time, the air in the room is circulated through the filter 6,
Dust floating in the room air is removed by the filter 6. And, even though the air is purified by such ventilation, if the indoor air becomes more dirty,
The signal level of the contamination detection signal Sc from the gas sensor 13 rises and finally exceeds the second set level (t _{2 in} FIG. 5). Then, it outputs a high-speed drive signal proceeds from step S ₄ to step S _9, thereby, the motor 5 rotates at high speed, rapid blowing operation is performed Te following. Then, as a result of the rapid air blowing operation, the pollution degree of the indoor air decreases, and accordingly, the pollution detection signal Sc from the gas sensor 13 is generated.
When the signal level of is lower than the second set level (time t _{3 in} FIG. 5), the process proceeds to step S ₈ again to execute the strong blowing operation.

Now, as described above, the human detection sensor 1 is operated during the strong air blowing operation.
Even if the human detection signal Sa is output from the human detection sensor 10 by detecting the presence of a person by 0 (the fifth
At time t ₄ ) in the figure, the contamination detection signal S from the gas sensor 13
Since the signal level of c is first set level or more, the operation controller 15 is not able to proceed to step S _6, the result, blowing operation strength is maintained. Then, when the signal level of the contamination detection signal Sc from the gas sensor 13 falls below the first set level (time t _{5 in} FIG. ₅ ), step S ₆
Then, it is determined whether or not the human detection signal Sa is input from the human detection sensor 10. At this time, (see FIG. 5 (b)) from the human detection sensor outputs a human detection signal Sa In the human detection state, step S10 from step S ₆
Then, it is determined whether or not the dark detection signal Sb is output from the optical sensor 14. At this time, the indoor illumination is on and the dark detection signal Sb is not output from the optical sensor 14 (see FIG. 5 (a)), so it is determined to be "NO" and the process proceeds to step S11 to set the flag. At the same time as setting, a low speed drive signal is output in step S12, and thus a weak air blowing operation is performed.

When the person in the human detection sensor 10 in the detection state turns off for bedtime example, dark detection signal Sb from the optical sensor 14 is output (Fig. 5 in time t _6). Then, the operation control device 15 determines "YE" in step S10.
If the flag is set, the process proceeds to step S13 to determine whether the flag is set. At this time, since the flag has been set, it is determined to be "YES" and the process proceeds to step S14 to output the timer start signal to the timer circuit 18 and reset the flag in step S15. Then, in step S16, a low speed drive signal is output to the drive circuit 17, whereby the timer circuit 18 is driven and the weak air blowing operation is maintained. Then, in step S17, it is monitored by the time-over signal Sd whether or not the timer circuit 18 has timed out. If the time has not expired, the process proceeds to step S16 to maintain the weak air blowing operation. When the time-over signal Sd is input from the timer circuit 18 30 minutes after the timer circuit 18 is driven (t _{7 in} FIG. 5), “YE
S "is judged and the output of the drive signal to the drive circuit 17 is stopped. Then, after the timer circuit 18 times out, even if the human detection signal Sa is output from the human detection sensor 10, the input of the human detection signal Sa is invalid as long as the dark detection signal Sb is output from the optical sensor 14. Therefore, the motor 5 is not driven. Even if the input of the human detection signal Sa from the human detection sensor 10 is invalidated, the contamination detection signal Sc from the gas sensor 13 is generated.
The motor 5 is driven based on the signal level of.

In short, according to the above configuration, the operation control device 15
When the optical sensor 14 detects that the light sensor 14 is turned off and outputs the darkness detection signal Sb during execution of the automatic driving based on the detection state of the human detection sensor 10, the human detection signal Sa from the human detection sensor 10 is output.
Since the input of is invalidated, the person who is sleeping can detect the human sensor 1
Even if it is detected by 0, the motor 5 is not driven, and thus it is possible to prevent the air from being unnecessarily blown even when the degree of pollution of the air in the room during sleep is relatively low. In addition, in the case of the above-described embodiment, when the light sensor 14 detects that the light is turned off, the human detection state of the human detection sensor 14 is not invalidated immediately and the air blowing is stopped, but it is the timer operating time of the timer circuit 18. Since the air blowing is stopped after performing a weak air blowing operation for only 30 minutes, even if the air in the room gets dirty by hanging the futon on the body after the light is turned off, the dirty air in the room can be sufficiently removed. The person detection state of the person detection sensor 10 can be invalidated after cleaning.

Further, in the above-described embodiment, even when the detection state of the human detection sensor 10 is invalidated due to the dark detection signal output from the optical sensor 14, the gas sensor 13 is disabled.
Since the air is blown depending on the detection state, even if the air in the room is contaminated while the light is turned off, the air is blown according to the degree of the dirt, and the room can be cleaned.

Furthermore, when the output of the dark detection signal Sb from the optical sensor 14 is cut off because the brightness of the room exceeds the set level, the automatic operation is performed again based on the detection state of the human detection sensor 10. Even if the indoor air gets dirty due to a bright wake and awakening from bedtime, the indoor air can be immediately cleaned without setting automatic operation.

The gas sensor 14 is not necessarily provided, and the air may be blown only based on the detection state of the human detection sensor 10. Further, when the light sensor 14 detects that the light sensor 14 is turned off by omitting the timer circuit 18, the human detection sensor 10 is immediately activated.
You may make it invalidate the detection state of.

In addition, the present invention is not limited to the one described above and shown in the drawings, and may be variously modified without departing from the scope of the invention, such as being applicable to a ventilation fan.

[Effects of the Invention] As is clear from the above description, according to the blower device of claim 1, the person detection state of the person detection sensor is invalidated based on the dark detection state of the optical sensor, so that the person can go to sleep. When the room lighting is turned off, the motor operation is stopped even if the human detection sensor is in the human detection state.Therefore, the automatic driving function that blows air based on the human detection state of the human detection sensor is used. It is possible to invalidate the inside, so that it is possible to prevent a situation in which useless driving is performed while sleeping while the indoor air pollution degree is relatively low.

Further, according to the air blower of the second aspect, during the timer operation that is executed after the dark detection signal is output from the human detection sensor, the automatic operation is performed based on the detection state of the human detection sensor. Immediately after the light is turned off for going to bed, it is possible to execute the air blowing for a desired time and improve the usability.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a block diagram showing an electrical structure, FIG. 2 is a perspective view of the whole, FIG. 3 is a vertical sectional view of the whole, and FIG. FIG. 5 is a flow chart showing the control contents of the apparatus, and FIG. 5 is a timing chart of each signal. In the figure, 4 is a fan, 5 is a motor, 10 is a human detection sensor,
13 is a gas sensor, 14 is an optical sensor, 15 is an operation control device, and 18 is a timer circuit.

Claims (2)

[Scope of utility model registration request] 1. A motor for driving a fan, a human detection sensor for detecting the presence of a person and outputting a human detection signal, and a light for outputting a dark detection signal when the ambient brightness falls below a set level. The sensor and the human detection sensor performs the automatic driving to drive the motor based on the human detection signal, and when the dark detection signal is output from the optical sensor during the automatic driving, the human detection is performed only during that period. An air blower comprising: an operation control device that invalidates a signal input. 2. A timer circuit for performing a timer operation for a set time, wherein the operation control device drives the timer circuit when a dark detection signal is output from an optical sensor and detects a person during the timer operation. The air blower according to claim 1, wherein the air blower is configured to stop the signal input invalidation function.