JPH0673601U - Cooker safety device - Google Patents

Abstract

(57) [Summary] [Purpose] In cookers such as gas tables, the presence or absence of people near the cooker is detected using an infrared sensor, etc.
When there is no person near the cooking device while cooking, i.e. igniting, a warning is given to the person when a predetermined time has elapsed, and the fire can be extinguished automatically, and cooking failure due to overheating time, or even emptying To provide a cooking device safety device that prevents gas accidents and fires due to cooking or forgetting to turn off the fire. [Composition] A cooking detection unit (1) that outputs when the cooking device is ignited and used, a human detection unit (2) that outputs when a person is near the cooking device, and a timer that outputs after a predetermined time from the absence of a person Section (3), cooking detection section (1) and human detection section (2)
When the state of cooking and the absence of a person continues for a predetermined time or longer, the control unit (4) for operating the notification unit (5) and an alarm are determined based on the output of the timer unit (3). It is composed of an electronic circuit provided with a notifying section (5) for emitting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In this invention, in a heating cooker such as a gas table, an oven, an electromagnetic cooker, or an electric stove, an alarm is given to a person when an abnormality occurs, and the supply of gas or electricity is shut off, and cooking fails due to overheating time. Furthermore, it relates to a cooking device safety device that prevents gas accidents and fires due to empty cooking or forgetting to turn off the fire.

[0002]

[Prior art]

 Conventionally, this type of safety device has a temperature sensor that detects the temperature of the bottom of the pot, and a controller such as a micro computer automatically shuts off the gas to prevent charring and the ignition of tempura oil. Some do this based on control. In addition, there was a cooker equipped with a device that sets the cooking time according to the type of food and informs or automatically extinguishes when the set time elapses from the time of starting or igniting.

[0003]

[Problems to be solved by the device]

 The above-mentioned application of the micro computer and fuzzy has high performance, but has a high cost, and is only provided in high-end models. In addition, the taste of cooking is often influenced by slight adjustment of the heating time, and in a conventional cooker equipped with a device that informs or extinguishes when the set time elapses from the ignition, for example, when cooking I estimated the time required, set that time on a timer, left the place by igniting, but if the prediction was wrong and the overheated condition was already reached in a short time, it was not notified or extinguished, and the dish tasted. Will be dropped. Cooking requires a lot of human judgment, such as the amount of heat, and cooking often fails when you take your eyes off the pot for a long time. Therefore, it is necessary to keep people away from the kitchen and the kitchen. Especially for dishes where cooking time is difficult to predict, it is highly necessary to check the inside of a pot at short intervals. The present invention was devised to solve these drawbacks.

[0004]

[Means for Solving the Problems]

 In order to solve the above drawbacks, the present invention provides a cooking detection unit (1) that outputs when a cooker is ignited and used, a person detection unit (2) that outputs when a person is near the cooker, and an absence of person. From the timer unit (3), the cooking detection unit (1), the human detection unit (2) and the timer unit (3), which are output after a predetermined time from, the dangerous state (during cooking and An electronic device equipped with a control unit (4) for operating the notification unit (5) and a notification unit (5) for notifying a person of a dangerous state It is a safety device that configures a circuit and issues an alarm when a person leaves the vicinity of the cooking device for a predetermined period of time while igniting. Further, in a dangerous state, a shutoff means may be provided for automatically shutting off the gas of the gas cooker and the electricity of the electric cooker. Further, the cooking detection section (1), the human detection section (2), the timer section (3), the control section (4) and the notification section (5) are provided in a small box, and the small box is provided on the outer surface of the cooker. It can be easily attached with a magnet or double-sided tape, and whether or not cooking is in progress can be detected by the reed switch, limit switch, etc. from the ignition switch knob of the cooker, and it can be easily installed on the existing controller. It may be an external mounting type that can be mounted. Furthermore, a reed switch or a limit switch may be adopted as the cooking detecting section (1) and used as a power switch to turn on the safety device of the present invention when the cooker is used.

[0005]

[Action]

 According to the above-mentioned configuration, the present invention is configured such that the detecting part (1) is ON while the cooking device is being used, that is, the cooking detecting part (1) is ON, and the human detecting part (2) is away from the vicinity of the cooking device (for example, within 2 m). When the output of is turned off, the timer section (3) starts counting, and when a predetermined time (for example, 5 minutes) or more elapses, the notification section (5) operates, an alarm sounds, and the cutoff means (6) operates. If the timer unit (3) is counting or the notifying unit (5) is operating, if cooking is stopped or a person returns to the vicinity of the cooking device, that is, the cooking detection unit (1) is turned off or When the output of the human detection section (2) is turned on, the timer section (3) is cleared and the notification section (5) is deactivated.

[0006]

【Example】

 Embodiments of the invention will be described below. As an example, a cooking device safety device of the present invention will be described with reference to FIG. 2 showing an embodiment provided in a gas table. A reed switch (7) is used as a cooking detection unit (1) to ignite the cooking device. A magnet piece is provided on the internal rotating shaft that works with the switch knob to detect whether the knob is open or closed to detect whether cooking is in progress. If there are multiple knobs, provide a reed switch (7) and a magnet piece for each. An infrared sensor (8) is used as the human detection unit (2) to detect infrared rays emitted from the human body, detect changes in the amount of infrared rays when a person moves, and output when there is a change as if there is a person. The circuit (9) is adopted. The timer unit (3) is a timer circuit (10) equipped with a time setting unit (11), which uses a timer IC capable of setting time with a capacitor capacity or a resistance value. A gate circuit (12) using a gate IC as a control unit (4). The notification unit (5) includes a piezoelectric sounder (14) that emits an electronic sound and an oscillation circuit (13) that sounds the piezoelectric sounder (14). Although the reed switch (7) is adopted as the above-mentioned cooking detecting section (1), a limit switch may be adopted instead of this, and a heating section of a cooking device is also used by using a temperature sensor such as a thermocouple. The temperature (eg, burner) may be measured to detect whether or not cooking is in progress. Further, in a cooker equipped with a power switch, cooking may be performed when the switch is ON, and this may be obtained. In addition, the infrared sensor (8) and its circuit (9) were used as the human detection section (2), but instead of this, CdS, a phototransistor, etc. were used to detect changes in the light amount when a person moved. , An optical sensor circuit that outputs when there is a change, a so-called photoelectric switch that uses visible rays or infrared rays, and an ultrasonic wave that captures or emits ultrasonic waves that are reflected by a person. An ultrasonic sensor circuit that detects the interruption of sound waves by a person may be adopted.Furthermore, a sensor circuit that detects object sounds such as a voice emitted by a person, and furthermore, a radio wave is emitted and reflected by a person. It is also possible to adopt a sensor circuit that detects and detects the. A buzzer or an audio oscillator may be used as the notification unit (5). The operation when operating through the gate circuit (12) of the control unit (4) with the above configuration will be described with reference to FIG. 3. During cooking, that is, the reed switch (7) is ON (step 301), and When the dangerous state where the output of the infrared sensor circuit (9) is turned off (step 302), the timer circuit (10) starts counting (step 303). At this time, if the dangerous state is removed, the timer circuit (10) is cleared (step 306) and the process returns to step 301, but the dangerous state (steps 304 and 305) is continued and the predetermined time set by the time setting unit (11). When the time (for example, 5 minutes) or more has elapsed (step 307), the timer circuit (10) is cleared (step 308), the oscillation circuit (13) operates, and the piezoelectric sounder (14) emits an alarm sound (step 309). .. At this time, if the dangerous state (steps 310 and 311) disappears, the alarm sound is stopped (step 312) and the process returns to step 301, but if the dangerous state continues, the alarm sound continues to sound.

In the embodiment shown in FIG. 4, in the cooking device safety device of the present invention shown in FIGS. 2 and 3, the gas supply to the burner (19) is automatically performed when a dangerous state has passed for a predetermined time or more. This is an example in which a valve drive circuit (17) for shutting off and an automatic valve (18) are newly provided. In the case of an electric regulator, it is conceivable to install a relay as a disconnection means to cut off the supply of electricity to the heating section. Here, the gas or electricity is cut off by operating at the same time as the piezoelectric sounder (14), but it is also possible to add a timer circuit to start the cutoff operation a little later than the start of notification (for example, 1 minute). For safety reasons, it is better not to automatically release the cutoff even if you are out of danger.

The embodiment shown in FIGS. 5 and 6 is an external mounting type in which the electronic circuit is housed in a small box (21) in the cooking device safety device of the present invention of FIGS. 2 and 3 described above. It was done. A magnet (22) is provided on the back surface of the small box (21) so that the magnet (22) can be easily attached to the front surface of an iron outer box of a gas table (25) or the like, and the reed switch (7). Is provided on the upper part of the small box (21), and with the ignition switch knob (24) of the cooking device closed, attach a magnet piece (23) to the lower part of the knob with double-sided tape or the like. Attach the small box (21) to the front of the cooker by bringing the reed switch (7) close to the bottom of (23). Here, as the reed switch (7), a switch that energizes when the magnet piece (23) is separated is adopted. A limit switch may be used instead of the reed switch (7). A small detection piece may be attached to the bottom of the ignition switch knob (24) with double-sided tape, and the limit switch lever may be attached to the detection piece. Alternatively, the opening / closing of the ignition switch knob (24) may be detected. Also, the small box (21) can be attached to the front of the cooker by using double-sided tape instead of the magnet (22). Then, as shown in FIG. 6, in the case of a cooker having a plurality of ignition switch knobs (24), the magnet pieces (23) are attached under the ignition switch knobs (24), respectively, and the reed switch is attached as described above. It is also possible to put (7) in small cases, arrange them in parallel, and attach the cases under the magnet pieces (23) with double-sided tape or the like. Although the battery is provided inside the small box (21) as the power supply section (15), it may be wired from an external power supply device. With these configurations, it becomes an external mounting type that can be easily mounted on an existing cooker.

In the embodiment shown in FIG. 7, the reed switch (7) used as the cooking detecting section (1) in the cooking device safety device of the present invention shown in FIGS. This is an example in which the cooker safety device of the present invention is turned on at the same time when the cooker is used, and is turned off when the cooker is finished using. A limit switch may be adopted instead of the reed switch (7) as described above. As a result, the cooking device safety device of the present invention does not need to be turned on and off, and electricity consumption can be eliminated when the controller is not used.

[0010]

[Effect of device]

 Since the present invention is configured as described above, it has the following effects. 1. The structure is simple and can be manufactured relatively inexpensively. 2. Keep people away from the vicinity of the cooker for a long time, so you can keep your eyes on the pot for cooking for a long time, reduce cooking mistakes, and forget to cook empty or forget to put out the fire. It is possible to prevent gas accidents and fires from occurring. 3. Even if the timer section is set to a short time, it will not be informed if there is a person, so there will be no annoying alarm sounds. 4. The notification automatically stops as soon as a person returns, and the timer automatically starts when there are no more people, so there is no need for this stop or start operation and almost no human intervention is required.

[Brief description of drawings]

FIG. 1 is a schematic block diagram of the present invention.

FIG. 2 is a block diagram showing an embodiment of the present invention.

FIG. 3 is a flowchart of an embodiment of the present invention.

FIG. 4 is a block diagram showing an embodiment including a breaking means of the present invention.

FIG. 5 is a perspective view showing an embodiment in which the device of the present invention is externally mounted.

FIG. 6 is a perspective view showing an embodiment in which the device of the present invention is externally attached and is attached to a cooking device.

FIG. 7 is a block diagram showing an embodiment in which a power switch is used as the cooking detection unit of the present invention.

[Explanation of symbols]

1 ... Cooking detection unit, 2 ... Human detection unit, 3 ...
・ Timer unit, 4 ... Control unit, 5 ... Notification unit,
6 ... Breaking means, 7 ... Reed switch, 8
... infrared sensor, 9 ... infrared sensor circuit, 10 ... timer circuit, 11 ... time setting section, 12 ... gate circuit, 13 ... oscillation circuit,
14 ... Piezoelectric Sounder, 15 ... Power Supply Unit, 1
6 ... Power switch, 17 ... Valve drive circuit, 1
8 ... Automatic valve, 19 ... Burner, 20 ... Gas piping, 21 ... Small box, 22 ... Magnet, 23
... Magnet pieces, 24 ... Ignition switch knobs, 2
5 ... Gas table, 26 ... Signal line

Claims (4)

[Scope of utility model registration request] 1. A cooking detection unit that outputs when a cooker is used, and a person detection unit that outputs when a person is near the cooker,
A timer unit that outputs after a predetermined time from the absence of a person, a control unit that operates the notifying unit when it is determined to be dangerous based on the outputs of the cooking detection unit and the human detection unit and the timer unit, Cooking device safety device equipped with a notification unit that informs the cooker. 2. The cooker safety device according to claim 1, further comprising a shutoff means for automatically shutting off in the dangerous state. 3. An electronic circuit of the cooking device safety device according to the present invention is provided in a small box, the small box is attached to the outer surface of the cooking device, and the detection of the in-cooking detection portion is performed by the ignition switch knob of the cooking device. The cooking device safety device according to claim 1 or 2, which detects the. 4. The cooking device safety device according to claim 1, 2 or 3, wherein the cooking detection unit is a power switch.