JPH0264336A - Operation control device for ventilating fan - Google Patents

Abstract

PURPOSE:To perform operation in a short time with enough exhaust capacity and to perform quiet operation and prevent lowering of exhaust capacity by providing a control circuit to switch a fan motor between HIGH and LOW operation by means of a 'BRIGHT' detecting signal and according to the presence of a man detecting signal, a timer means to stop operation at a point of time when count up of a first or a second limit is effected, and a drive circuit to perform HIGH and LOW operation and a stop. CONSTITUTION:When a 'BRIGHT' detecting signal is outputted from a photo sensor 13, by means of this signal, it can be decided that it is the day time in which surrounding environment is noisy. When, with this state, a man-detecting signal is outputted from a man-detecting sensor 10, a control circuit 16 outputs a HIGH operation signal. A drive circuit 18 starts operation of a fan motor 4 in a HIGH operation mode according to the HIGH operation signal. When an output of the man-detecting signal is out, a timer means 17 starts clocking motion for delay operation. In this case, since it is under a state in which the 'BRIGHT' detecting signal is outputted, the timer means outputs an operation stop signal at a point of time when count up of a rather short first limit is effected. The drive circuit stops running of the fan motor. Namely, under a state in which since ambient environment is noisy, a driver does not care, operation can be executed in a short time with enough exhaust capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an operation control device for a ventilation fan equipped with a human detection sensor and a light sensor.

(Prior Art) Conventionally, ventilation fans for toilets, for example, have been provided with a human detection sensor. In this one,
When a user enters the toilet, the person detection sensor detects this and starts operating the fan motor. When the user leaves the toilet, the fan motor is delayed for a certain period of time and then stops. It has become.

(Problem to be solved by the invention) By the way, in the above-mentioned system, in consideration of the fact that the ventilation fan is used during the daytime when there is a lot of human activity, the fan motor is operated strongly to some extent to obtain a sufficient exhaust air volume. Thus, the above-mentioned delay time can be shortened. However, in this case, the operating sound of the ventilation fan, which is not so noticeable during the day when the surrounding environment is noisy, may be felt to be quite noisy at night when the surrounding environment is quiet, and the sleep of the sleeper may be disturbed. Such problems are not limited to ventilation fans for toilets, but also apply to ventilation fans for living rooms.

The present invention has been made in view of the above circumstances, and
The first is to be able to operate with sufficient exhaust capacity in a short period of time when the surrounding environment is noisy, and to operate quietly without reducing the exhaust capacity when the surrounding environment is quiet. To provide a ventilation fan operation control device that can

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a human detection sensor that detects the presence of a person in a room in which a main body including a fan motor is installed and outputs a human detection signal, and a light sensor that outputs a "bright" detection signal when the brightness of the brightness exceeds a predetermined value;
When a detection signal is output, a strong driving signal is output when a human detection signal is output, and a weak driving signal is output when a human detection signal is output when a "bright" detection signal is not output. A control circuit that switches and outputs a weak operation signal when the output of the "bright" detection signal disappears in the output state of the strong operation signal, and a first time period and a second time period longer than this as the count-up time are set. The timing operation starts when the human detection signal is no longer output, and when the strong operation signal is output, the operation stop signal is output at the first count-up, and when the weak operation signal is output, the operation stop signal is output. a timer means for outputting an operation stop signal when a second time limit counts up; and a timer means for starting operation of the fan motor in a weak operation mode in response to the strong operation signal, and operating the fan motor in response to the weak operation signal. The fan motor is further provided with a drive circuit that starts the fan motor in a weak operation mode and stops the operation of the fan motor in response to the operation stop signal.

(Function) It is possible to distinguish between daytime, when the surrounding environment is noisy, and night time, when the surrounding environment is quiet, using the surrounding brightness as a guide.

In other words, if the light sensor outputs a "bright" detection signal, it can be determined that the surrounding environment is noisy during the day.

In this state, when the human detection sensor outputs a human detection signal, the control circuit outputs a strong driving signal. The drive circuit starts operating the fan motor in the strong operation mode in response to this strong operation signal. Then, when the human detection signal is no longer output, the timer means starts timing operation for delayed operation. In this case, since the "light" detection signal has been output, the timer means outputs the operation stop signal at the time when the first time period, which is shorter, has been counted up. The drive circuit then stops the operation of the fan motor. In other words, in a situation where the surrounding environment is noisy and the operating noise is not a concern, operation can be performed in a short time with sufficient exhaust capacity.

If the light sensor does not output a "bright" detection signal and a human detection signal is output, the control circuit outputs a weak operation signal, so the drive circuit operates the fan motor based on the weak operation signal. Start in low operating mode. After this, when the output of the person detection signal ceases, the timer means starts a timing operation. In this case, since a weak operation signal has been output, the timer means outputs an operation stop signal when the second time period, which is longer than the first time period, has been counted up. Stop motor operation. In other words, at night when the surrounding environment is quiet,
Operating noise can be reduced by setting the fan motor's operating mode to weak. In this case, although the air volume per unit time is small, the delayed operation time is increased by that amount, so there is no reduction in exhaust capacity as a result.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

First, FIG. 2 shows the ventilation fan with the decorative frame 2 separated from the main body 1. The main body 1 has a fan motor 4 mounted on an outer frame 3.
and a fan 5. Reference numeral 6 denotes a photodetection element, and numeral 7 denotes a photodetection element, which are respectively arranged at the lower front of the outer frame 3. When the decorative frame 2 is attached, the photodetection element 6 faces the outside through the shaded bay window 8. , photodetection element 7
faces the outside through a photodetection window 9.

Next, FIG. 1 shows an electrical configuration, and in the same figure, 10 is a human detection sensor, which amplifies the photodetection element 6 and the electrical signal generated in this photodetection element 6. It consists of an amplifier circuit 11 and a comparison circuit 12 that compares the amplified signal from the amplifier circuit 11 with a legal value. The human detection sensor 10 detects the presence of a human in the room where the main body 1 is installed and outputs a human detection signal Sm.

13 is a photosensor, which includes the photodetection element 7 and
An amplifier circuit 14 that amplifies the electrical signal generated in the photodetector element 7, and a "bright" detection signal when the amplified signal from the amplifier circuit 14 is compared with a predetermined value and the amplified signal exceeds the predetermined value. The comparison circuit 15 outputs Sc. The above-mentioned predetermined value is set to a value such that the "bright" detection signal Sc is output from the brightness of natural light during the day to the brightness due to illumination at night, and the signal Sc is not output when there is no illumination at night. There is.

Reference numeral 16 denotes a control circuit including a microcomputer, to which the output from the human detection sensor 10 and the output from the optical sensor 13 are applied. This control circuit 16 receives the human detection signal Sm and the "bright" signal.
A strong operation signal sh and a weak operation signal S are output depending on the presence or absence of human power for the detection signal Sc. In other words,
When the "light" detection signal Sc is output and the human detection signal Sm is output, the strong driving signal sh is output, and when the "light" detection signal Sc is not output, the human detection signal Sm is output. When the weak operation signal S
(outputs ``bright'' in the output state of the strong operation signal sh)
When the output of the detection signal Sc disappears, the weak operation signal S
Switch and output i.

Reference numeral 17 denotes a timer circuit serving as timer means, to which a human detection signal Sm is applied from the human detection sensor 10, and a strong operation signal sh and a weak operation signal S (are applied from the control circuit 16). , and a first time period Th and a second time period T (longer than the first time period Th) are set as the count-up time. This timer circuit 17 starts a timing operation when the output of the human detection signal Sm disappears. During this timing operation, the strong operation signal sh
is given, the operation stop signal Se is output when the first time limit Th counts up, and the weak operation signal S is output.
If (is given), the operation stop signal Se is output at the time of count-up of the second time limit T1.

Reference numeral 18 denotes a drive circuit, which receives the strong operation signal Sh1, weak operation signal s1. and an operation stop signal Se. When the drive circuit 18 receives the strong operation signal sh, it starts operating the fan motor 4 in the strong operation mode, and also starts the operation of the fan motor 4 in the strong operation mode, and also starts the operation of the fan motor 4 in the strong operation mode. When is given, the operation of the fan motor 4 is started in the weak operation mode, and when the operation stop signal Se is given, the operation is stopped. In this case, in the strong operation mode, the fan motor 4 is driven at high rotation speed and exhibits a strong air blowing action, resulting in a large air volume per unit time.In the weak operation mode, the fan motor 4 exhibits a weak air blowing effect, resulting in a large air flow per unit time. Air volume becomes small.

Now, the operation of the above configuration will be explained. It is now assumed that this ventilation fan is placed and used in the toilet.

First, consider the case of daytime. In this case, as shown in FIG. 3(b), a "bright" detection signal Sc is output. In this situation, when a person enters the toilet (time t1), the person detection sensor 10 sends a person detection signal S as shown in FIG.
m is output.

Then, the control circuit 16 outputs a strong driving signal sh based on this human detection signal Sm. The strong operation signal sh is given to the timer circuit 17 and the drive circuit 18, and the drive circuit 1
8 starts the operation of the fan motor 4 in the strong operation mode in response to the strong operation signal sh, as shown in FIG.

After this, when the person leaves the toilet, the output of the person detection signal Sm disappears (time t2). Then, the timer circuit 17 starts timer counting. In this case, this timer circuit 17
Since the strong operation signal sh is given to the timer circuit 17, the timer circuit 17 outputs the operation stop signal Se when the first time limit Th is counted up.

As a result, the operation of the fan motor 4 is stopped (time t
,). In other words, delayed operation is performed during the first time Th.

As can be seen from this, in the daytime when the surrounding environment is noisy and the operation noise is not a concern, when a person is detected and ventilation operation is performed, the operation is performed with sufficient exhaust capacity, and the delayed operation is performed for a short period of time. It will be done within.

Next, we will discuss the case at night. When a person uses the toilet, the toilet light is usually turned on. However, as shown in Figure 4, at night, the light
The detection signal Sc is not output, and when a person enters the toilet, the light is turned on and the "bright" detection signal S is output.
c is output (time ta). Next, when a person enters the toilet, a person detection signal Sm is output (time t,), and with this,
Since the control circuit 16 outputs the strong operation signal sh, the drive circuit 18 operates the fan motor 4 in the strong operation mode. After this, when the person leaves the toilet, the output of the person detection signal Sm disappears (time tb), and the timer circuit 1
8 starts counting operation. At this point, the strong operation signal sh is still being output, so the first time limit Th is being counted. However, when a person leaves the restroom, the lights are turned off, so at this time,
In response to this, the control circuit 16 switches the output of the strong operation signal to the output of the weak operation signal, so that at this time t7, the fan motor 4 is in the weak operation mode. Become driven. The timer circuit 17 also receives a weak operation signal S1. is given, so
The timer circuit 17 divides the count-up time into a second time period T (and outputs the operation stop signal Se when the second time period T (counts up). Since it operates strongly when the toilet is in use (when the lights are on), it is convenient as a ventilation fan for the toilet where ventilation while the toilet is in use is the top priority. Delayed operation automatically switches to low operation mode as soon as the lights go out, so the operation noise can be reduced at night when the surrounding environment is quiet and will not disturb the sleeper's sleep. Although the air volume per hour is reduced by approximately 100 liters, the delayed operation time is lengthened by that amount, so as a result, the reduction in exhaust capacity can be avoided and insufficient ventilation can be eliminated. .

Next, a case will be described in which the ventilation fan having the above configuration is installed and used in a living room, for example. When the lights are on during the day or at night,
If there are people in the living room, as can be seen from the above, the fan motor 4 is operated in the strong operation mode and at the first time limit Th. Therefore, if people in the living room are active and dust is thrown up or smoke is generated due to smoking, the room can be ventilated in a short time. On the other hand, even if the lights are not turned on at night, when people move, dust on the floor etc. will be kicked up, creating the need for ventilation. In this case, as shown in FIG.
When a person is detected in a situation where the "light" detection signal Sc is not output (time t8), the human detection signal Sm is output, and the control circuit 16 outputs the weak operation signal S! Output. Therefore, the fan motor 4 is operated in the weak operation mode, and after this, when there is no one present and the output of the human detection signal Sm disappears, the timer circuit 17 starts counting operation from time t, and in this case, the weak operation mode is activated. Since the signal SI- is applied to this timer circuit 17, the timer circuit 17 is set to the second time period T.
When < is counted up, the operation stop signal Se is output. As can be seen from this, when the surrounding environment is quiet at night and there is no need for quick ventilation (in the case of no lighting), the fan motor 4 is set to the weak operation mode from the beginning and the delay time is long (second time period). Operate at T1.). This makes the driving noise quieter and does not disturb the sleeper's sleep. In this case as well, the air volume per unit time is small, but the delayed operation time is lengthened accordingly.
As a result, it is possible to eliminate a decrease in exhaust capacity and to eliminate insufficient ventilation.

Note that the present invention is not limited to the above embodiments,
For example, the predetermined value (so-called threshold level) serving as the brightness determination standard for the optical sensor 13 is set between the brightness under natural light during the day and the brightness under illumination light at night. It may be possible to set the system to strong operation at night, and to operate at low power at night. Further, the above-mentioned predetermined value may be changed using an arbitrary volume control or variable volume.

The Ikensui invention can be implemented with various modifications without departing from the gist.

[Effects of the Invention] As is clear from the above description, the present invention includes a human detection sensor that detects the presence of a person in a room in which a main body equipped with a fan motor is installed and outputs a human detection signal. , an optical sensor that outputs a "bright" detection signal when the brightness of the room exceeds a predetermined value; and a light sensor that outputs a "bright" detection signal when the brightness of the room exceeds a predetermined value; When the human detection signal is output when the "bright" detection signal is not output, a weak operation signal is output, and when the "light" detection signal is no longer output while the strong operation signal is being output, the weak operation signal is output. The control circuit that switches and outputs the driving signal, and the first one as the collar 7 and door knob time.
A time period and a second time period which is longer than this time period are set, and when the human detection signal is no longer output, the timing operation is started, and when the strong operation signal is output, the operation is stopped when the first time period is counted up. a timer means for outputting a signal and outputting a stop signal at the count-up of a second time period when the weak operation signal is being output; and a timer means for operating the fan motor in a weak operation mode in response to the strong operation signal. and a drive circuit that starts operation of the fan motor in a weak operation mode in response to a weak operation signal, and further stops operation of the fan motor in response to the operation stop signal. In situations where the surrounding environment is noisy,
It has excellent effects such as being able to operate with sufficient exhaust capacity in a short period of time, and also being able to operate quietly and without reducing exhaust capacity in quiet surroundings. play.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a block diagram of the electrical configuration, Fig. 2 is a perspective view of the ventilation fan with the decorative frame separated from the main body, and Figs. 3 to 5 show the operation. This is a time chart for explanation. In the figure, 1 is a main body, 4 is a fan motor, 10 is a human detection sensor, 13 is a light sensor, 16 is a control circuit, 17 is a timer circuit (timer means), and 18 is a drive circuit. Figure 1 Procedural Amendment 1. Display of the case Japanese Patent Application No. 63-214696 2, title of the invention: ventilation fan operation control device 6, claims and detailed description of the invention in the specification to be amended. 7. Contents of amendment (1) The scope of claims is amended as shown in the attached sheet. (2) "Weak operation mode" stated in the first line of page 5 of the specification
is corrected to "strong driving mode". (3) 1-low driving mode described in page 16, line 20 of the same
is corrected to "strong driving mode". Toshiba Telephone Corporation <052> 251-2707 Name Patent attorney (
7113) Tsuyoshi Sahara 2, Claim 1, a person detection sensor that detects the presence of a person in a room in which a main body including a fan motor is installed and outputs a person detection signal, and a person detection sensor that outputs a person detection signal, and the brightness of the room is set to a predetermined value. and an optical sensor that outputs a "bright" detection signal when the light is on, and a light sensor that outputs a strong driving signal and a "bright" detection signal when a human detection signal is output while the "bright" detection signal is being output. ” control that outputs a weak operation signal when a human detection signal is output when no detection signal is output, and further switches to output a weak operation signal when the “bright” detection signal is no longer output in the output state of a strong operation signal. A first time period and a longer second time period are set as the count-up time in the circuit, and when the human detection signal is no longer output, the timing operation is started, and when the strong operation signal is output, the first time period is set. a timer means for outputting an operation stop signal when a second time limit counts up, and outputs an operation stop signal when a second time limit counts up when a weak operation signal is output; a drive circuit that starts the operation of the motor in a strong operation mode, starts the operation of the fan motor in the weak operation mode in response to a weak operation signal, and further stops the operation of the fan motor in response to the operation stop signal; A ventilation fan operation control device comprising:

Claims (1)

[Claims] 1. A person detection sensor that detects the presence of a person in a room where the main unit equipped with a fan motor is installed and outputs a person detection signal, and a person detection sensor that outputs a person detection signal when the brightness of the room exceeds a predetermined value.
an optical sensor that outputs a "bright" detection signal; and an optical sensor that outputs a strong driving signal when a human detection signal is output when the "bright" detection signal is output, and when the "bright" detection signal is not output; A control circuit that outputs a weak operation signal when a human detection signal is output, and switches and outputs a weak operation signal when the "bright" detection signal is no longer output in the output state of a strong operation signal, and a control circuit that outputs a weak operation signal as a count-up time. A time period and a second time period which is longer than this time period are set, and when the human detection signal is no longer output, the timing operation is started, and when the strong operation signal is output, the operation is stopped when the first time period is counted up. a timer means for outputting a signal and outputting a stop signal when a second time limit is counted up when a weak operation signal is being output; and a timer means for operating the fan motor in a weak operation mode in response to the strong operation signal. and a drive circuit for starting the operation of the fan motor in a weak operation mode in response to a weak operation signal, and further stopping operation of the fan motor in response to the operation stop signal. .