JPH03236514A - Preventive device against forgetting extinction of burner - Google Patents

Abstract

PURPOSE:To securely prevent a failure which might be produced owing to a burner left behind in a combusting state by providing movement detector means for detecting the existence of any human movement and constructing a title device such that combustion of the burner is stopped when the human movement is not detected over a predetermined time. CONSTITUTION:An igniter is actuated to ignite a burner, and to turn on combustion interruption means 7, a control circuit 8b of movement detector means 8, and clock means 9. Hereby, electromotive of a thermocouple 3 and combustion of the burner are maintained by a safety valve 4. After the clock means 9 starts to count, as the movement detector means 8 detects the movement of a man, the clock means 9 is reset for further counting. Alternatively, once the movement detector means 8 does not detect the movement of a man and the clock means 9 completes the counting over a predetermined time, a control circuit 7b of the combustion interruption means 7 is actuated to close the safety valve 4 at once and hence interrupt the combustion of a burner 2. Thereafter, power supply to the combustion interruption means 7, the control circuit 8b of the movement detector means, and the clock means 9 is turned off.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The invention of the present application relates to a device for preventing forgetting to turn off a combustor such as a gas stove or a gas stove.

[Prior Art] FIG. 7 shows an example of a conventional combustor forget-to-turn-off prevention device. As shown in FIG. 7, in this combustor forget-to-turn-off prevention device, A manually reset type safety valve 24 which is kept open by the electromotive force of the thermocouple 23 is provided in the gas supply path to the burner 22 . A gas cock 2 is provided between the safety valve 24 and the burner 22.
5 is provided, and a device stopper 26 is arranged in the casscock 25, and by operating this, the safety valve 24 and the gas cock 25 are opened, and an ignition device (not shown) is activated to ignite the burner 22. .

The combustor 21 further includes an ultrasonic transmitter 28a and a receiver 2.
When there is a human body detection signal from the human body detection means 28, the burner 22 continues to burn, and when no human body detection signal is input, the burner 22 is extinguished by closing the safety valve 24. Combustion stop means 27 is provided.

In the combustor forget-to-turn-off prevention device having the above configuration, the presence of two human bodies is detected by receiving the ultrasonic waves transmitted from the ultrasonic transmitter 28a and reflected by the two human bodies at the receiver 28b. And human body detection means 2
8 detects the human body 29, the safety valve 24 is kept open and the burner 22 continues to burn, and when the valve receiver 28b does not receive the ultrasonic waves reflected from the two human bodies, the safety valve 24 is closed. The combustion of the burner 22 is stopped, and the fire in the combustor 2 is extinguished.

[Problems to be Solved by the Invention] However, in the conventional combustor forget-to-turn-off device described above, combustion continues or is stopped by detecting the presence or absence of a human body. Even if a person is unable to move due to a sudden illness or unexpected accident, if there is a person near the combustor, the human body detection means will detect the presence of a human body, so the combustor will not be extinguished and safety will be compromised. The problem is that it is sufficient.

The present invention solves the above problems, and provides a device for preventing forgetting to turn off a combustor, which detects the presence or absence of human movement and extinguishes the combustor when no human movement is detected for a predetermined period of time. With the goal.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the combustor forgetting to turn off prevention device according to the first invention of the present application includes a motion detection means for detecting a human motion, and the motion detection means. a timekeeping means that counts a predetermined time when no human motion is detected, and resets and counts the predetermined time again when the motion detection means detects a human motion during counting; The present invention is characterized by comprising a combustion stop means for stopping combustion in the combustor when the count of is completed.

Further, the combustor forgetting to turn off device according to the second invention of the present application includes a motion detecting means for detecting a human motion, and a counting method that counts a predetermined time when the motion detecting means does not detect a human motion. a first timer that is reset and starts counting a predetermined time again when the motion detection means detects a human motion; and when the motion detection means detects a human motion during counting, it is reset, and when the first timekeeping means newly counts the predetermined time and finishes counting, it starts counting the predetermined time again. an alarm means that operates while the second timer is counting; and a combustion stopper that stops combustion in the combustor when the second timer finishes counting a predetermined time. It is characterized by comprising the following.

[Operation] In the device for preventing forgetting to turn off a combustor according to the first invention of the present application, the motion detection means detects the presence or absence of motion of a person near the combustor. When the motion detection means does not detect a human motion, the time measurement means starts counting a predetermined period of time. If the motion detection means detects a human motion before the timekeeping means finishes counting, the timekeeping means is reset and the burner continues combustion. On the other hand, if the motion detection means does not detect a large movement during the counting of the timer and the timer finishes counting for a predetermined time, the combustion stop means is activated to stop combustion of the burner and extinguish the combustor. .

Further, in the combustor forgetting to turn off device according to the second invention of the present application, the motion detection means detects the presence or absence of motion of a person near the combustor. When the motion detecting means does not detect a human motion, the first time measuring means starts counting. If a signal indicating that a human motion has been detected is input from the motion detection means before the first timekeeping means finishes counting, the first timekeeping means is reset and the burner continues combustion. On the other hand, if the motion detection means does not detect a human motion during the counting of the first timekeeping means and the first timekeeping means ends counting, the first timekeeping means is reset and the second timekeeping means is reset. The timer is activated and starts counting a predetermined time. and,
The alarm means is activated at the same time that the second timer starts counting, and issues an alarm while the second timer starts counting.

When a signal indicating that a human motion has been detected is input from the motion detection means during the counting of the second timekeeping means, the second timekeeping means is reset and held in that state, and at the same time the alarm means is stopped. However, the burner continues to burn. Then, the first timer starts counting again. On the other hand, when the motion detection means does not detect a human movement during counting by the second timer and the second timer finishes counting for a predetermined time, the combustion stopper operates to stop combustion of the burner; Extinguish the combustor.

[Example] Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 1 is a system diagram of a gas stove equipped with a device for preventing forgetting to turn off a combustor according to the first invention of the present application, and FIG. 2 is a plan view of the gas stove. As shown in these figures, a manually reset type safety valve 4 that is held open by the electromotive force of a thermocouple 3 is provided in a gas supply path to a burner 2 provided in a gas stove (combustor) 1. . A gas cock 5 is provided between the safety valve 4 and the burner 2.

An instrument stopper 6 is attached to this casscock 5,
By operating the appliance plug 6, the safety valve 4 and the gas cock 5 are opened, and an ignition device (not shown) is operated to ignite the burner 2. A pyroelectric infrared sensor 8a is attached to the front surface of the combustor 1. This pyroelectric infrared sensor 8a is connected to a sensor control circuit 8b that controls it, and constitutes a motion detection means 8 that detects the motion of a person near the combustor 1.

The motion detection means 8 detects the motion for a predetermined period of time (for example, 10 minutes).
However, this is not limited to this), and the clocking means 9 is connected to a timer circuit 9 that counts a person's motion when the motion detection means detects a human motion within a predetermined period of time. Equipped with a clock release function that stops the clock. The timing means 9 is connected to the combustion stop means 7.

This combustion stop means 7 includes a thermocouple 3 as shown in FIG.
A switch 7 provided in the operating circuit of the safety valve 4 connected to
a, and a control circuit F! that controls the switch 7a. ? 17b, and when no motion detection signal is input for a predetermined period of time and the timer 9 finishes counting the predetermined time, the safety valve 4 is closed and the combustion of the burner 2 is stopped.

Next, the operation of the gas stove configured as described above and equipped with a device for preventing forgetting to turn off the combustor will be explained using the flowchart shown in FIG. 4.

When the appliance plug 6 is opened in step 101, the ignition device (not shown) is activated to ignite the burner 2 (step 102), and the control circuit 8 for the combustion stop means 7 and the operation detection means 8
b and the timer means (timer #l) 9 are turned on (step 103), the burner combustion is maintained by the electromotive force of the thermocouple 3 and the safety valve 4 (step 104), and then the timer means 9 starts counting. Start (step 105), after the timer Pi9 starts counting, the motion detection means 8
detects the presence or absence of human motion (step 106), and when the motion detection means 8 detects the human motion, the timer means 9 is reset (step 107), and returns to step 105 to count again. As soon as the timer means 9 finishes counting the predetermined time without detecting any movement of the person by the means 8, the control circuit 7b of the combustion stop means 7
is activated and the safety valve 4 is immediately closed (step 109).
), combustion of burner 2 is stopped (step 110).

Then, the power of the combustion stop means 7, the #I control circuit 8b of the operation detection means, and the time measurement means 9 are turned off (step 1
11).

Next, a device for preventing forgetting to turn off a combustor according to an embodiment of the second invention of the present application will be described.

FIG. 5 is a system diagram of a gas stove that has a combustor forget-to-turn-off prevention device according to the second invention of the present application, and FIG. 2 is a plan view of the gas stove. (Combustor) 1 A gas supply path to a burner 2 is provided with a manually reset safety valve 4 that is held open by the electromotive force of a thermocouple 3. A gas cock 5 is provided between the two.

A device plug 6 is attached to this gas cock 5,
By operating the appliance plug 6, the safety valve 4 and the gas cock 5 are opened, and an ignition device (not shown) is operated to ignite the burner 2. A pyroelectric infrared sensor 8a is attached to the front surface of the combustor 1. This pyroelectric infrared sensor 8a is connected to a sensor control circuit N8b that controls it, and these constitute a motion detection means 8 that detects the motion of a person near the combustor 1.

The motion detecting means 8 is connected to a first time measuring means 9 comprising a timer circuit that counts a predetermined period of time (for example, 10 minutes, but not limited thereto). The first timer 9 is configured to be reset when it finishes counting for a predetermined time, and is also configured to cancel the timer to stop counting when the motion detector 8 detects a human motion within a predetermined time. It has functions. The first timer 9 is connected to a second timer 10, and the second timer 10 counts a predetermined period of time (for example, 30 seconds, but not limited to this).
The second timer 10 is configured to be reset and held in that state when the motion detector 8 detects a human motion within a predetermined period of time. This second timekeeping means 10
is connected to combustion stop means 7 and alarm means 11. As shown in FIG. 3, the combustion stop means 7 includes a switch 7a provided in the operating circuit of the safety valve 4 connected to the thermocouple 3;
It is composed of a control circuit 7b that controls the switch 7a, and when the second timer 1O finishes counting a predetermined time, the safety valve 4 is closed to stop the combustion of the burner. Also, alarm hand 1 = M11 is buzzer 11a and LED
1 lb, and is configured to notify an abnormality visually and audibly, and operates while the second timer 10 continues counting.

Next, the operation of the gas stove configured as described above and equipped with a device for preventing forgetting to turn off the combustor will be explained using the flowchart shown in FIG.

When the appliance stopper 6 is opened in step 201, the ignition device (not shown) is activated and the burner 2 is ignited (step 202). The timer circuit) 9 is turned ON (step 203), and the burner combustion is maintained by the electromotive force of the thermocouple 3 and the safety valve 4 (step 204).6 Next, the first timer circuit 9 starts counting (step 203). 205), after the first timer 9 starts counting, the motion detector 8 detects the presence or absence of a human motion (step 206), and when the motion detector 8 detects the human motion, the first timer 9 starts counting. The clock hand P19 is reset (step 207), and the process returns to step 205 to count again.

On the other hand, if the motion detection means 8 does not detect a human motion and the first timer 9 finishes counting the predetermined time and is reset (step 208>), the second timer 10 starts counting. 209), at the same time, the alarm means 11 operates and issues an alarm (step 210), and when the motion detection means 8 detects a human motion while the second timer means 10 is counting (step 211), the alarm means 11 stops. At the same time (step 212), the second timer 10 is reset (step 213), and the process returns to step 205, where the first timer 9 starts counting again.

On the other hand, when the motion detection means 8 does not detect a human motion and the second timer means 10 finishes counting the predetermined time (step 214), the control circuit Fp117b of the combustion stop means 7 is activated and the safety valve 4 is immediately activated. is closed (step 217);
At the same time, the alarm means 11 is stopped (step 215), and the second timer 10 is reset (step 21).
6) By closing the safety valve 4 in this way, the combustion of the burner 2 is stopped and the combustor 1 is extinguished (step 218). Then, the control circuit 88b of the combustion stop means 7 and the operation detection means 8 is closed. and first and second timekeeping means9.
10 is turned off (step 219>).

In the above embodiment, the motion detection hand Pi8 that detects human motion is
A pyroelectric infrared sensor is used as a pyroelectric infrared sensor, but this pyroelectric infrared sensor is not limited to those that detect human movement by the sensor itself, but also those that detect movement by the sensor peripheral circuit from fluctuations in sensor output. (For example, one that takes a differential value of the sensor output) may be used as the motion detection means 8.

Furthermore, the count numbers of the timekeeping means 9 in the first invention and the first and second timekeeping means 9 and 10 in the second invention are not particularly limited and may be made variable.

The combustion stop means 7 for stopping the combustion of the burner 2 is not limited to the method of insulating the circuit as in the above embodiment, but may also be performed by, for example, closing the main gas valve.

Further, in the above embodiment, the case where the combustor is a gas stove has been explained, but the device for preventing forgetting to turn off a combustor according to the present invention is a device for preventing forgetting to turn off a combustor in the pond, and furthermore, a device for preventing forgetting to turn off an appliance other than the combustor. It can also be applied as

[Effects of the Invention] As described above, the device for preventing forgetting to turn off a combustor according to the first invention of the present application includes a motion detection means for detecting the presence or absence of a human motion, and detects the presence or absence of a human motion for a predetermined period of time. The combustor is configured to stop combustion when the combustor is not in use, so even if someone in the vicinity of the combustor becomes ill due to a sudden illness or falls asleep and is unable to move, the combustor can be reliably restarted after a predetermined period of time. This ensures that the fire is extinguished quickly and that dangers arising from leaving the combustor in a burning state can be reliably prevented.

Further, the combustor forgetting to turn off prevention device according to the second invention of the present application further includes a second timer means and an alarm means in addition to the combustor forgetting to turn off prevention device according to the present invention, and issues an alarm for a predetermined period of time. Since the combustor is configured to stop combustion when no human movement is detected, it is possible to obtain the effect achieved by the device for preventing forgetting to turn off the combustor according to the first invention of the present application, and also to prevent malfunctions. This can further improve reliability and usability.

[Brief explanation of drawings]

FIG. 1 is a system diagram showing the configuration of a device for preventing forgetting to turn off a combustor according to the first invention of the present application, FIG. 2 is a plan view showing a combustor using the device for preventing forgetting to turn off a combustor, and FIG. is a circuit diagram showing the configuration of the combustion stop means, FIG. 4 is a flowchart showing the operation of the combustor forgetting to turn off device according to the first invention of the present application, and FIG. FIG. 6 is a flowchart showing its operation, and FIG. 7 is a system diagram showing the configuration of a conventional combustor forgetting prevention device. 1...Combustor 7...Combustion stop means 8...Operation detection means 9...Timekeeping means (first timekeeping hand 19.) 10.
...Second clocking means 11...Alarm means

Claims (2)

[Claims] (1) A motion detection means for detecting a human motion; when the motion detection means does not detect a human motion, a predetermined period of time is counted; and when the motion detection means detects a human motion during the count, the motion detection means is reset; A method for preventing forgetting to turn off a combustor, comprising: a timer for counting a predetermined time again; and a combustion stopper for stopping combustion in the combustor when the timer finishes counting the predetermined time. Device. (2) a motion detection means for detecting a human motion, which counts a predetermined time when the motion detection means does not detect a human motion, and is reset when the motion detection means detects a human motion during the count; a first timer that starts counting a predetermined time again when the first timer finishes counting a predetermined time; and during counting, the motion detector detects a human movement. a second timer that is reset when the first timer detects the predetermined time, the first timer starts counting the predetermined time again, and starts counting the predetermined time again when the first timer starts counting the predetermined time again; and a combustion stop means that stops combustion in the combustor when the second timer finishes counting a predetermined time. Device.