JPH0293226A - Air blower - Google Patents

Abstract

PURPOSE:To prevent useless operation of a blower of an air cleaner, etc., by a method wherein an automatic operation function, that air blow is carried out according to the state detected by a human body sensor, is selectively canceled by a timer for a desired period of time. CONSTITUTION:When a signal Sp is output from a human body sensor 12 at time t1, an auxiliary timer circuit 18 outputs a signal Sp1 to a controller 16 for 30 minutes to bring a motor 5 into operation at a low speed according to a driving instruction Sm1, so that the air in a room is circulated through a filter. When the level of a signal Sd from an air pollution detecting sensor 15 exceeds a level VL, the strength of air blow is changed from 'weak' to 'medium'. When the timer action is set, the strength of air blow is changed according only to the air pollution signal, but neglecting the human body signal.

Description

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

(Prior Art) In recent years, air purifiers, which are an example of air blowing devices, are equipped with a human detection sensor that detects the presence of a person, and drive an air blowing motor based on a human detection signal from the human detection sensor. Vehicles equipped with self-driving functions are on the rise. In other words,
When there is a person in the room, the person detection sensor goes into the detection state and ventilation is automatically performed, whereas when there is no person in the room, the person detection sensor goes into the non-detection state and ventilation is performed. This prevents unnecessary air blowing, such as air blowing even when no one is present.

(Problem to be Solved by the Invention) However, with the above-mentioned conventional system, if the person goes to bed with automatic operation set, the person who is sleeping is detected by the person detection sensor and the ventilation is automatically turned off. It will be executed. Therefore, even when the indoor air is relatively clean and there is no need to blow air, such as when the user is sleeping, the motor is driven and the sound becomes harsh.

Therefore, an object of the present invention is to be able to selectively disable the automatic operation function that blows air based on the detection state of the human detection sensor for a desired time period, thereby preventing unnecessary operation. An object of the present invention is to provide an air blowing device that can prevent such problems from occurring.

[Structure of the Invention] (Means for Solving the Problems) The blower device of the present invention includes a person detection sensor that detects the presence of a person and outputs a person detection signal, and a timer circuit that performs a timer operation for a set time. is provided, and executes an automatic operation that drives a fan drive motor based on a human detection signal from the human detection sensor, and when a timer operation of the timer circuit is started during the execution of the automatic operation. An operation control device is provided that disables the input of the human detection signal only while the timer is operating.

In addition, an air pollution level detection sensor is provided which outputs a pollution detection signal according to the air pollution level, and an operation control device is configured to detect pollution from the air pollution level detection sensor during the timer circuit is in operation. The motor may be configured to be driven based on the signal.

(Function) When the human detection sensor detects the presence of a person, it outputs a human detection signal. Then, the operation control device performs automatic operation to drive the fan drive motor based on the human detection signal. When a time is set in the timer circuit, the timer operation is executed only during the set time. Then, when the timer operation of the timer circuit is started during automatic operation, the operation control device disables the input of the human detection signal only during the timer operation. As a result, automatic driving is performed in a state in which the detection state of the human detection sensor is disabled for the time set in the timer circuit. That is, for example, if the timer operation is executed while the person is sleeping, the motor will not be driven even if the presence of the sleeping person is detected by the person detection sensor. Therefore, a sleeping person will not feel uncomfortable due to the sound from the motor. Furthermore, when the timer operation ends, the vehicle is immediately returned to the automatic operation state based on the detection state of the human detection sensor.

When an air pollution degree detection sensor is provided, the sensor outputs a pollution detection signal according to the pollution of the indoor air. Then, the operation control device drives the fan drive motor based on the contamination detection signal from the air stain level detection sensor while the timer circuit is in operation. Therefore, even if the air becomes contaminated during the timer operation, the air can be expected to be purified by blowing air.

(Example) Hereinafter, an example in which the present invention is applied to an air purifier will be described with reference to the drawings.

First, in FIGS. 2 to 4 showing the mechanical structure of the air purifier, 1 is an outer box, the front part of which is formed with an air intake r12 consisting of many slits, and the upper part of which has a plurality of slits. An exhaust port 3 is formed. Further, inside the outer box 1, a fan 4 and a variable speed motor 5 for rotationally driving the fan 4 are disposed. A filter 6 is disposed within the outer box 1 at a position on the rear side of the intake port 2. Further, on the upper part of the outer box 1, a panel section 9 is provided with various switches including an automatic operation start switch 7 and a timer time setting switch 8 (both shown in FIG. 1). Reference numeral 10 denotes a person detection section provided on the front side of the outer box 1, which is composed of a cover 11 and a person detection sensor 12 facing forward through the cover 11. Further, 13 is an air pollution level detection section provided on the front part of the outer box 1, which is
It consists of a communication section 14 made up of a plurality of slits and an air pollution level detection sensor 15 that communicates with the outside via this communication section 14.

Now, in FIG. 1 showing the main part of the electrical configuration, the automatic operation start switch 7 is connected to the operation control device 16, and when turned on, gives an automatic operation command Sa to the operation control device 6. . The timer time setting switch 8 is connected to the operation control device 16 via a timer time storage circuit 17 that also constitutes a timer circuit, and sets the timer time width T to the timer time storage circuit 1 based on the setting operation.
7, and after the setting is completed, the setting end signal St
is output to the timer time storage circuit 17. When the timer time storage circuit 17 receives the setting end signal St from the timer time setting switch 8, it outputs the timer operation command Stt for the timer time width T from that timing. On the other hand, the human detection sensor 12 is connected to an operation control device 16 via an auxiliary timer circuit 18. This human detection sensor 12 utilizes the pyroelectric effect, and when its surface temperature changes due to infrared rays emitted from a person, it outputs a human detection signal Sp corresponding to the degree of change.

The human detection sensor 12 stops outputting the human detection signal Sp when the surface temperature stops changing, that is, when the person to be detected is stationary. Sp actually becomes a pulse-like signal. The auxiliary timer circuit 18 is connected to the human detection sensor 12.
When the human detection signal Sp is inputted from the input, the human detection signal spt is output for, for example, 30 minutes from that timing. Furthermore, when the human detection signal Sp is manually inputted again during the output period of the human detection signal spt, the auxiliary timer circuit 18 further extends the output time of the human detection signal Sp+ by 30 minutes from that timing. The air pollution level detection sensor 15 is connected to the operation control device 16 via a comparator circuit 19, and outputs a pollution detection signal Sd having a signal level corresponding to the air pollution level. Further, a lower limit comparison level VL and an upper limit comparison level V11 are set in the comparator circuit 19, and the signal level of the contamination detection signal Sd is between the lower limit comparison level VL and the upper limit comparison level V11. In some cases, the contamination detection signal Sdl
Then, when the signal level of the contamination detection signal Sd exceeds the upper limit comparator level VI (or outputs the contamination detection signal Sd2). Further, the motor 5 is connected to an operation control device 16 via a drive circuit 20. This drive circuit 20 drives the motor 5 at a low speed when a drive command S1 is given from the operation control device 16,
When the drive command Sn+2 is given, the motor 5 is driven at an intermediate speed, and when the drive command 5I113 is given, the motor 5 is driven at a high speed.

Now, the operation control device 16 is configured to include a micro convenience circuit, and includes a pre-stored program, an automatic operation start switch 7, a timer time storage circuit 17.
Auxiliary timer circuit 18. Based on each signal from the comparator circuit 19, the drive command S all,
Output S d, S m3.

Next, the operation of the above configuration will be explained based on the flowchart of FIG. 5 showing the contents of the automatic driving program by the driving control device 16.

When the automatic operation start switch 7 is operated, an automatic operation start command Sa is given to the operation control device 16, and in response, the operation control device 16 executes the automatic operation program. That is, the timer operation command S is sent from the timer time storage circuit 17.
When tt is not manually operated, rNO is entered in step Sl.
Judging as J.

When a person is located in the detection area of the human detection sensor 12 in this state, the infrared rays emitted from the person are given to the human detection sensor 12, which changes the surface temperature of the human detection sensor 12 and causes the human detection sensor 12 to The human detection signal Sp is shown in Figure 6 (
c) Output as shown at intermediate time t1. Then, the auxiliary timer circuit 18 outputs the human detection signal Spl for 30 minutes from the timing at which the human detection signal Sp is input. As a result, the operation control device 16 outputs "YE" in step S2.
SJ is determined, and in the next step S3 it is determined whether any contamination detection signal is input.

If the answer is "NO", proceed to step S.

Then, the drive command Sml is output. As a result, the drive circuit 20 drives the motor 5 at a low speed, and in response, indoor air is sucked in from the intake port 2 by the suction force of the fan 4, and the sucked air enters the room from the exhaust port 3. It is discharged. At this time, since the indoor air is circulated through the filter 6, dust floating in the indoor air is removed by the filter 6. And the human detection signal Sm
When the input of the human detection signal Sml is interrupted 30 minutes after the timing when l is input, the process proceeds from step S2 to step S1 via steps ss and ss, and the drive command S
Stop outputting il. As a result, air is blown at a "low" intensity for 30 minutes after the human detection sensor 12 detects a person, so that even if the air is relatively slightly contaminated due to the presence of a person, it can be sufficiently cleaned. .

Furthermore, as shown at time t2 in FIG. 6(c), the human detection signal Sp is again output from the human detection sensor 12 within 30 minutes after the human detection signal Sp is output from the human detection sensor 12.
is output, the auxiliary timer circuit 18 extends the output of the human detection signal Spl for another 30 minutes from that timing, so that the signal continues for 30 minutes from the last timing when a person was detected by the human detection sensor 2. The indoor air is purified by blowing air at a "low" intensity.

Next, when a person is detected by the person detection sensor 12, that is, when air is being blown at "weak" intensity, if the indoor air becomes polluted due to cigarette smoke, for example, the air pollution degree detection The sensor 15 outputs a contamination detection signal Sd having a signal level corresponding to the degree of air contamination.

At this time, if the signal level of the contamination detection signal Sd is lower than the lower limit comparator level VL set in the comparator circuit 19, no contamination detection signal is output from the comparator circuit 19, and the operation control is thereby performed. Device 1
6 outputs the drive command 5ral as described above,
Therefore, the drive circuit 20 drives the motor 5 at a low speed. Now, as the pollution of the indoor air progresses, the signal level of the pollution detection signal Sd from the air pollution degree detection sensor 15 increases as shown at time t3 in FIG.
When the lower limit comparator level VL of 9 is exceeded, the comparator circuit 19 outputs the contamination detection signal Sold, which causes the operation control device 16 to perform the steps from step S to step S8.
Then, the drive command 5IW2 is output. As a result, the drive circuit 20 drives the motor 5 at a medium speed, and the blowing intensity is switched from "low" to "medium" accordingly. If the indoor air becomes even more polluted despite the "medium" intensity air blowing, the signal level of the human detection signal Sd from the human detection sensor 12 increases and at time t4 in the middle of FIG. 6(e). As shown, it exceeds the upper limit comparator level V11. Then, the contamination detection signal Sd2 is output from the comparator circuit 19, and the operation control device 16 proceeds from step S6 to step S and outputs the drive command Sm3. Then, the drive circuit 20 drives the motor 5 at a high speed, and accordingly the blowing intensity is switched from "medium" to "strong".In other words, when the human detection sensor 12 detects a person, it is switched to "low". ” air is blown, and
When the air pollution degree detection sensor 13 detects air pollution of a predetermined level or higher, air is blown at a strength corresponding to the pollution, and both sensors 12 and 13 are in a detection state. At this time, air is blown based on the detection state of the air pollution level detection sensor 15.

Now, a timer time T is set in the timer time storage circuit 17 by the timer time setting switch 8, and after the setting is completed, a setting completion signal S is outputted as shown in FIG. 6(a). Then, from the timer time storage circuit 17, the sixth
As shown in Figure (b), the timer operation command Stl is output, and as a result, the operation control device 16 performs step S! , it is determined as "YESJ" and the process proceeds to step S5, where it is determined whether or not the contamination detection signal Sdl is manually generated.In other words,
While the timer operation command Stl is being given, the step S2 of determining whether or not the human detection signal Spl has been given is skipped, so the human detection by the human detection sensor 12 is disabled, and as a result, the air pollution degree detection is disabled. The drive circuit 20 is controlled only based on the detection state of the sensor 15. Then, when the timer time T set in the timer time storage circuit 17 has elapsed, the timer IB1 storage circuit 17 stops outputting the timer operation command Stf. Then, since the timer operation command SLI is no longer given to the operation control device 16, the operation control device 16 starts accepting the input of the human detection signal Spl again at that timing, and thus the human detection signal spt and the contamination detection signal Sdl. , Sd2 to control the drive circuit 20. In addition, the operation control device 16
When the timer operation command Stl is given from the timer time storage circuit 17 while inputting the human detection signal Spl, the input of the human detection signal Spl is not immediately invalidated, but the current input signal is The human detection signal Spl input after the timing when the input of the human detection signal spt is cut off is invalidated.

In short, according to the above configuration, the operation control device 16
When the timer operation command Stl is given from the timer time storage circuit 17 during execution of automatic operation, the human power of the human detection signal spt from the auxiliary timer circuit 18 is disabled, so the timer operation period is By setting , for example, at the time of sleeping, it is possible to prevent the motor 5 from being driven even if a sleeping person is detected by the human detection sensor 12 . This means that while sleeping, the air in the room does not become extremely polluted due to little movement of people, and the need for ventilation is not so high. Moreover, in the above embodiment, even during the period when the human detection signal spt from the auxiliary timer circuit 18 is disabled because the timer operation command Stl is output from the timer time storage circuit 17, the comparator circuit 1
Since the contamination detection signals S di and S d2 from 9 are valid, even if the indoor air becomes polluted while sleeping,
Air is blown according to the degree of dirtiness, thereby making it possible to clean the room.

Further, in the above embodiment, when the timer operation command Stl is given while the human detection signal Spl is being manually supplied, that is, while blowing air at "weak" intensity, the operation control device 16 outputs the human detection signal Spl. Instead of immediately disabling the human power of Spl and stopping the air blowing, the system is configured to disable the input of the human detection sensor Spl after the input of the human detection signal Spl is cut off, so when going to bed, When a person moving around the room in front is detected by the person detection sensor 12, the input of the person detection signal spt is disabled after the indoor air that has been contaminated by the person's movement is sufficiently purified. . Furthermore, when the timer operation ends, automatic operation is performed again based on the input of the human detection signal Spl and the pollution detection signals sdi and Sd2, so for example, when you wake up from sleep and operate the automatic operation start switch 7, Human detection sensor 12 without resetting automatic driving
Automatic operation based on the detected state can be executed immediately.

Note that the air pollution level detection sensor 15 does not necessarily need to be provided, and only the human detection sensor 12 may be provided. In addition, a human detection sensor 12 and an air pollution level detection sensor 1
In addition to 5, the air blowing may be controlled based on the detection states of various sensors.

In addition, the present invention is not limited to what has been described above and shown in the drawings, and can be modified in various ways without departing from the gist, such as being applied to a ventilation fan, for example.

[Effects of the Invention] As is clear from the above description, the blower device according to claim 1 includes a motor that drives the fan, and a person detection sensor that detects the presence of a person and outputs a person detection signal. established,
A timer circuit that performs a timer operation for a set time is provided, and an automatic operation for driving the motor is executed based on a human detection signal from the human detection sensor, and a timer operation of the timer circuit is performed during execution of the automatic operation. Since we have provided an operation control device that disables the human power of the human detection signal only during the timer operation when the timer is started, it can be selectively disabled for a desired time period, thereby eliminating unnecessary operation. This has an excellent practical effect of being able to prevent situations from occurring.

Further, according to the blower device according to claim 2, an air pollution level detection sensor is provided which outputs a pollution detection signal according to the air pollution level, and the timer circuit is configured to control the operation control device when the timer circuit is in the evening or early morning operation. Since the motor is driven during the period based on the pollution detection signal from the air pollution level detection sensor, in addition to the effect of the air blower according to claim 1, there is no possibility that the air may become contaminated during the timer operation. It can also be expected to have the effect of purifying the air by blowing air. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a block diagram showing the electrical configuration, Fig. 2 is an overall oblique view, Fig. 3 is an overall vertical sectional view, and Fig. 4 shows the degree of contamination. Vertical cross-sectional view of the detection part,
FIG. 5 is a flowchart showing the control contents of the operation control device, and FIG. 6 is a timing diagram of each signal. In the figure, 4 is a fan, 5 is a motor, 8 is a timer time setting switch (timer circuit), 9 is a timer time memory circuit (timer circuit), 12 is a human detection sensor, 15 is an air pollution level detection sensor, and 16 is a In the operation control device, 20 is a drive circuit.

Claims (1)

[Claims] 1. A motor that drives a fan, a human detection sensor that detects the presence of a person and outputs a human detection signal, a timer circuit that performs a timer operation for a set time, and the human detection sensor. Executing an automatic operation that drives the motor based on a human detection signal from the automatic operation, and when a timer operation of the timer circuit is started during execution of the automatic operation, disabling the input of the human detection signal only during the timer operation. An air blowing device characterized by comprising an operation control device that performs the following operations. 2. Equipped with an air pollution level detection sensor that outputs a pollution detection signal according to the air pollution level, and the operation control device outputs a pollution detection signal from the air pollution level detection sensor while the timer circuit is in operation. The blower device according to claim 1, wherein the motor is driven based on the air flow rate.