JP2013181729A - Safety device for cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a safety device for a cooking stove, which can be easily mounted on an existing cooking stove, has a wider detection area for intrusion of a human body, clothes or the like and has higher safeness.SOLUTION: A safety device 1 for a cooking stove, which can be mounted on a cooking stove 50 having a burner, includes two different types of intrusion detecting means (10R, 10L) (20R, 20L), alarming means (43, 44) and a control means. When the control means predicts intrusion of an object including a human body or clothes into a preliminarily set alarming area, based on a detection signal from the two types of the intrusion detecting means, the control means outputs an alarm by using the alarming means.

Description

  The present invention relates to a stove safety device that can be retrofitted to an existing stove.

Conventionally, a stove using city gas, propane gas, or the like has been widely used in general households and used in cooking and the like.
In the stove, since a flame is emitted directly from the burner, a stove equipped with various safety devices has been devised.
For example, the prior art described in Patent Document 1 includes human sensors on the left and right sides of the grill exhaust on the back side of the stove, and when the user's arms and hands are close to each other or the user is wearing There is disclosed a stove with a human sensor that reduces or extinguishes the burning power of a burner when an increase in the surface temperature of clothing is detected.
In addition, the prior art described in Patent Document 2 includes a pair of light-shielding photosensors or ultrasonic sensors at the left and right ends in the vicinity of the top plate on the front side of the stove. A gas stove with a flammable safety device that extinguishes a burner when an ultrasonic wave is cut off is disclosed.

JP 2004-293953 A Japanese Patent Laid-Open No. 4-118

In the prior art described in Patent Document 1, since the sensor, the fire extinguishing mechanism, and the stove are integrally formed, the stove with a human sensor cannot be used unless the stove is replaced. In this case, the existing stove is wasted and much labor and cost are required for replacement. There is also a need for a complex structure that squeezes or extinguishes the burner flame.
In the prior art described in Patent Document 2, the detection area for detecting the intrusion of a human body or clothing is very narrow. The detection area is only a substantially linear space sandwiched between a pair of sensors provided on the left and right of the front side of the top board, and this cannot detect the intrusion of a human body or clothing from the side of the stove or from above the stove there is a possibility. Moreover, since the sensor, the fire extinguishing mechanism, and the stove are integrally configured as in Patent Document 1, the stove must be replaced.
The present invention was devised in view of these points, and can be easily attached to an existing stove, and has a wider detection area for intrusion of a human body, clothing, etc., and a safer stove. It is an object to provide a safety device for a vehicle.

In order to solve the above problems, the stove safety device according to the present invention takes the following means.
First, a first aspect of the present invention is a stove safety device that can be attached to a stove equipped with a burner, comprising two different types of intrusion detection means, alarm means, and control means, wherein the control means is Based on detection signals from the two types of intrusion detection means, an alarm is output using the alarm means when it is predicted that an object including a human body or clothing will enter a preset alarm area.

According to the first aspect of the present invention, by providing two different types of intrusion detection means, it is possible to broaden the detection area of the intrusion of an object such as a human body or clothing, and the safety for the stove is higher. An apparatus can be realized.
In addition, based on detection signals from two different types of intrusion detection means, it is possible to more accurately predict the intrusion of an object into the alarm area, thereby suppressing erroneous determination and improving safety.

  Next, a second invention of the present invention is a stove safety device according to the first invention, wherein the two different types of intrusion detection means are a capacitance detection means attached at a predetermined position of the stove. A distance detecting means or an imaging means attached to the stove at a position above the stove.

In the second aspect of the invention, the capacitance detection means may be attached to the existing stove, and the distance detection means or the imaging means may be attached above the existing stove, and can be easily attached to the existing stove.
In addition, the electrostatic capacity detection means attached to the stove can appropriately detect the intrusion of an object such as a human body or clothing at a position relatively close to the stove, and the distance detection means or the imaging means attached above the stove relatively An intrusion of an object such as a human body or clothing from a position far from the stove can be detected.
Therefore, it is possible to detect the intrusion of objects such as human bodies and clothes in a wider range, and more accurately predict the intrusion of objects into the alarm area, realizing a safer stove safety device can do.

Next, a third aspect of the present invention is a stove safety device according to the first aspect or the second aspect of the present invention, further comprising combustion detection means capable of detecting that the burner is in combustion. Prepared,
The control means stops the output of the alarm from the alarm means when it is detected that the burner is not combusting based on the detection signal from the combustion detection means.

  In the third aspect of the invention, when the burner is not used, it is possible not to output an alarm.

It is a perspective view explaining the whole structure in one embodiment of the stove safety device 1 of the present invention. It is a block diagram explaining the structure of the stove safety device. The figure explaining 1st detection area A1 which is the detection area of 1st intrusion detection means 10R, 10L, 2nd detection area A2 which is the detection area of 2nd intrusion detection means 20R, 20L, and alarm area B1L, B1C, B1R It is. 7 is a flowchart illustrating an example of a processing procedure of a control unit 46.

EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.
● [Overall configuration of stove safety device 1 (Fig. 1)]
First, with reference to the perspective view of FIG. 1, the appearance and arrangement position of each component of the stove safety device 1 will be described. In addition, in FIG. 1, each component of the stove safety device 1 is indicated by a solid line, and the existing stove 50 and the existing hood 60 are indicated by a dotted line.
The stove safety device 1 includes first intrusion detection means 10R and 10L which are two different types of intrusion detection means, second intrusion detection means 20R and 20L, and a control unit 40. The stove safety device 1 shown in the example of FIG. 1 also includes the combustion detection means 30 and the fire extinguishing signal output terminal 42, but the combustion detection means 30 and the fire extinguishing signal output terminal 42 may be omitted.
Note that the stove 50 and the hood 60 are existing ones, and the hood 60 is disposed above the stove 50 and has a suction fan inside, and sucks steam, smoke, and the like and discharges them to the outdoors.
The stove 50 is an existing stove having burners 51R, 51L, 51C, a grill window 52, a grill exhaust port 53, a flame adjustment knob 54, and the like. Although not shown, there is a grill burner behind the grill window 52.
Some existing stoves include a fire extinguishing signal input terminal 55 that extinguishes the flame of the burner by an external electric signal. The existing stove 50 described in the present embodiment will be described using an example of a stove having the fire extinguishing signal input terminal 55. However, for an existing stove having no fire extinguishing signal input terminal 55, the stove The safety device 1 does not extinguish the burner but outputs an alarm.

  The first intrusion detection means 10R and 10L are, for example, electrostatic capacity detection means (so-called electrostatic capacity sensors), and are attached to predetermined positions of the stove 50 (in the example of FIG. . Then, the first intrusion detection means 10R, 10L outputs a detection signal according to whether or not an object (human body, clothing, etc.) has entered the first detection area A1 shown in FIG. 3 to the control means 46 of the control unit 40. . The control means 46 of the control unit 40 can detect that an object has entered the first detection area A1 based on detection signals from the first intrusion detection means 10R and 10L. The first intrusion detection means 10R and 10L are relatively small sensors and can be easily attached to any position of the stove 50. Therefore, it can be easily attached to the existing stove 50.

  The second intrusion detection means 20R, 20L is, for example, a distance detection means (so-called photoelectric sensor or ultrasonic sensor) or an imaging means (so-called CCD camera), and a position above the stove 50 (the lower end of the hood 60 in the example of FIG. 1). To the stove 50 side. Then, the second intrusion detection means 20R, 20L receives a signal corresponding to the presence or absence of the intrusion of an object (human body, clothing, etc.) into the second detection area A2 shown in FIG. 3, and image information of the second detection area A2. Output to the control means 46 of the control unit 40. The control means 46 of the control unit 40 can detect that an object has entered the second detection area A2 based on detection signals from the second intrusion detection means 20R and 20L. The second intrusion detection means 20R and 20L are also relatively small sensors, and can be easily attached to an arbitrary position above the stove 50. Therefore, it can be easily attached above the existing stove 50.

  The combustion detection means 30 is, for example, a temperature detection means (so-called temperature sensor), and is attached to a position close to each of the burners 51R, 51L, 51C and the grill burner of the stove 50 (position close to each burner in the example of FIG. 1). ing. The combustion detection means 30 then outputs detection signals corresponding to the temperatures from the burners 51R, 51L, 51C and the grill burner to the control means 46 of the control unit 40. Based on the detection signal from the combustion detection means 30, the control means 46 of the control unit 40 can detect that at least one of the burners 51R, 51L, 51C and the grill burner is in combustion. The combustion detection means 30 is also a relatively small sensor and can be easily attached to any position of the stove 50. Therefore, it can be easily attached to the existing stove 50.

The control unit 40 is, for example, a box-shaped unit having a size that can be arranged at an arbitrary position around the existing stove 50.
The control unit 40 has wiring for detection signals from the first intrusion detection means 10R and 10L, wiring for detection signals from the second intrusion detection means 20R and 20L, and wiring for detection signals from the combustion detection means 30. It is connected. When the stove 50 includes the fire extinguishing signal input terminal 55, the wiring of the fire extinguishing signal output terminal 42 is also connected.

● [Details of stove safety device 1 (Fig. 2)]
Next, the details of the stove safety device 1 will be described with reference to the block diagram shown in FIG.
The control unit 40 has a power supply means 45, a control means 46, alarm means 43 and 44, a fire extinguishing signal output terminal 42, and the like.
The control unit 40 is connected to first intrusion detection means 10R, 10L, second intrusion detection means 20R, 20L, and combustion detection means 30.

The power supply means 45 includes an activation switch 41 that activates the stove safety device 1, is connected to a power source such as a commercial power supply, and supplies power to the control means 46.
The first intrusion detection units 10R and 10L are, for example, electrostatic capacitance sensors, and output detection signals to the control unit 46.
The second intrusion detection means 20R, 20L is, for example, a photoelectric sensor or a CCD camera, and outputs a detection signal or image information captured at predetermined time intervals to the control means 46.
The combustion detection means 30 is a temperature sensor, for example, and outputs a detection signal to the control means 46.
In the block diagram of FIG. 2, an interface circuit provided between the control means 46 and the first intrusion detection means 10R, 10L, an interface circuit provided between the control means 46 and the second intrusion detection means 20R, 20L, and control means. Description of an interface circuit provided between 46 and the combustion detection means 30 is omitted.

The control means 46 is, for example, a CPU, and when the first intrusion detection means 10R, 10L are capacitance sensors, the oscillation state is detected based on the detection signal to obtain a change in capacitance, as shown in FIG. It can be determined whether or not an object has entered the detection area A1.
When the second intrusion detection means 20R and 20L are photoelectric sensors, the control means 46 obtains the distance from the second intrusion detection means 20R and 20L to the detected object based on the detection signal, and detects the detection area A2 shown in FIG. It can be determined whether or not an object has entered.
When the second intrusion detection means 20R and 20L are CCD cameras, the control means 46 detects a moving object based on still image information received at regular intervals, and determines whether or not an object has entered the detection area A2. Judgment is possible.
Further, the control means 46 detects the temperature around the combustion detection means 30 based on the detection signal from the combustion detection means 30, and determines that any one of the burners is in combustion when the temperature is equal to or higher than a predetermined temperature. Is possible.

The alarm means 43 is a speaker, for example, and outputs an alarm by voice based on a control signal from the control means 46.
The alarm means 44 is, for example, an LED, and outputs an alarm with light based on a control signal from the control means 46.
The fire-extinguishing signal output terminal 42 is a terminal connected to the fire-extinguishing signal input terminal 55 when the existing stove 50 includes the fire-extinguishing signal input terminal 55. Based on the signal from the control means 46, the fire extinguishing signal output terminal 42 Output.
Note that the alarm means 43 and 44 and the interface circuit between the fire extinguishing signal output terminal 42 and the control means 46 are also omitted.

● [Judgment area for judging the intrusion of human body and clothes (Fig. 3)]
Generally, the capacitance sensor has a light processing load on the determination process by the control means 46 and is suitable for real-time intrusion detection. However, the detection area A1 is narrower than the detection area A2 such as a CCD camera. Therefore, the capacitance sensor (first intrusion detection means 10R, 10L) is arranged near the burner of the stove 50.
In contrast to the electrostatic capacity sensor, the photoelectric sensor, the ultrasonic sensor, and the CCD camera are heavier than the electrostatic capacity sensor in the determination processing load by the control means 46, and require more time for the intrusion detection determination than in the electrostatic capacity sensor. Cost. However, the detection area A2 is wider than the detection area A1 of the capacitance sensor, as shown in FIG. Therefore, a photoelectric sensor, an ultrasonic sensor, or a CCD camera (second intrusion detection means 20R, 20L) is arranged at a position slightly far from the burner of the stove 50, and the detection area A2 includes the periphery of the detection area A1. ing.
With this arrangement, when the user's human body or clothing enters a position close to the burner, it is determined in real time within the detection area A1, and when the user's human body or clothing enters a position far from the burner, it is detected. It is possible to make a determination with sufficient time in the area A2.
Then, alarm areas B1L, B1C, and B1R are set around the burners 51L, 51C, and 51R. Based on detection signals from two different types of sensors, the control unit 46 outputs an alarm when it is predicted that an object will enter the alarm areas B1L, B1C, B1R after a predetermined time. The alarm areas B1L, B1C, and B1R can be set to arbitrary areas.

● [Alarm output processing procedure in control means 46 (FIG. 4)]
Next, an example of a processing procedure of alarm output processing in the control means 46 of the control unit 40 will be described using the flowchart shown in FIG.
The control means 46 executes the alarm output process shown in FIG. 4 at a predetermined timing (for example, every 100 [ms], etc., every predetermined time).
In step S <b> 10, the control unit 46 determines whether any burner is burning based on the detection signal from the combustion detection unit 30. For example, the atmospheric temperature of the combustion detection means 30 is obtained from the detection signal from the combustion detection means 30, and when the obtained atmospheric temperature is equal to or higher than a predetermined temperature, it is determined that any burner is in combustion. When it is determined that any one of the burners is burning (Yes), the process proceeds to step S20, and when any burner is determined not to be burning (No), the process proceeds to step S40B.
By determining whether or not at least one burner is burning, it is possible to prevent an alarm from being output when the burner is not being used.
The control unit 40 is provided with a start switch 41 that allows the user to easily turn on or off the stove safety device 1 so that the user can easily turn it off when no alarm is required. It may be.

When the process proceeds to step S20, the control means 46 determines whether there is an intruding object based on the object detection results by the first intrusion detection means 10R, 10L and the object detection results by the second intrusion detection means 20R, 20L. And the position of the destination of the invading object after a predetermined time is predicted, and the process proceeds to step S30.
Note that the first intrusion detection process for detecting that an object has entered the detection area A1 is performed by a process executed at another timing (not shown). By performing the first intrusion detection process and the alarm output process at different timings, the first intrusion detection means 10R and 10L are detected in real time at an appropriate timing, and the intrusion detection result is used to perform the relevant figure. In the alarm output process No. 4, an alarm can be output to the user at an appropriate timing.
Similarly, the second intrusion detection process for detecting that an object has entered the detection area A2 is also performed by a process executed at another timing (not shown).

  In step S30, the control means 46 determines whether or not an object detected in the detection areas A1 and A2 is predicted to enter the alarm areas B1L, B1C, and B1R after a predetermined time (for example, 1 second). Determine. If it is predicted to enter the alarm area (Yes), the process proceeds to step S40A, and if it is predicted not to enter the alarm area (No), the process proceeds to step S40B.

When the process proceeds to step S40A, the control means 46 outputs an alarm from the alarm means and ends the process. In this case, an alarm is output by voice from the alarm unit 43, an alarm is output by light from the alarm unit 44, a fire extinguishing signal is output from the fire extinguishing signal output terminal 42, and the process is terminated.
When the process proceeds to step S40B, the control unit 46 stops outputting the alarm from the alarm unit and ends the process. In this case, the output of sound from the alarm unit 43 is stopped, the output of light from the alarm unit 44 is stopped, the output of the fire extinguishing signal from the fire extinguishing signal output terminal 42 is stopped, and the process is terminated.

As described above, the stove safety device 1 described in the present embodiment is only required to attach a relatively small sensor above the existing stove and the existing stove. Do not waste the stove. Further, the detection area can be made wider by the second intrusion detection means arranged particularly above the stove.
In addition, two types of intrusion detection means are used to detect the intrusion of an object more accurately, and an alarm is issued if an intrusion is predicted before the object enters the alarm area. Alarm can be output more appropriately. Thereby, the safety device 1 for stoves with higher safety can be realized.

The stove safety device 1 of the present invention is not limited to the appearance, configuration, structure, processing, and the like described in the present embodiment, and various modifications, additions, and deletions are possible without changing the gist of the present invention. .
In the description of the present embodiment, the example of the stove safety device 1 including the combustion detection means 30 and the fire extinguishing signal output terminal 42 has been described. However, the combustion detection means 30 and the fire extinguishing signal output terminal 42 may be omitted. .
In the description of the present embodiment, examples of the alarm unit 43 that outputs an alarm by voice and the alarm unit 44 that outputs an alarm by light are described as examples of the alarm unit. However, only one of them is provided. Alternatively, alarm means for outputting other types of alarms such as vibration means may be provided. The types of alarm means and the number of alarm means are not limited to those described in the present embodiment.
In the description of the present embodiment, an example in which two first intrusion detection means (10R, 10L) and two second intrusion detection means (20R, 20L) are provided has been described. The number and the number of second intrusion detection means may be any number, and are not limited to two.
In the description of the present embodiment, an example in which the grill window 52, the grill exhaust port 53, and the grill burner are provided as an example of the existing stove 50 has been described. However, the stove that does not include the grill window, the grill exhaust port, and the grill burner is also described. The stove safety device 1 of the present invention is applicable.
In the description of the present embodiment, an example in which the top plate is provided with three burners 51R, 51L, and 51C as an example of the existing stove 50, but the number of burners on the top plate of the existing stove 50 is three. It is not limited to individual.
In the description of the present embodiment, the example in which the temperature detection unit is used as the combustion detection unit 30 has been described. However, the combustion detection unit 30 is not limited to the temperature detection unit, and the burner is burning using light. It is possible to detect whether or not the burner is in combustion using various detection means such as a light detection means capable of detecting whether or not there is.

1 Stove safety device 10R, 10L First intrusion detection means 20R, 20L Second intrusion detection means 30 Combustion detection means 40 Control unit 41 Start switch 42 Fire extinguishing signal output terminal 43, 44 Alarm means 45 Power supply means 46 Control means 50 Stove 51C , 51R, 51L Burner 60 Hood A1, A2 Detection area B1L, B1C, B1R Alarm area

Claims (3)

In a stove safety device that can be attached to a stove with a burner,
Two different types of intrusion detection means,
Alarm means;
Control means,
The control means outputs an alarm using the alarm means when it is predicted that an object including a human body or clothing will enter an alarm area set in advance based on detection signals from the two types of intrusion detection means. To
Stove safety device. The stove safety device according to claim 1,
The two different types of intrusion detection means are electrostatic capacity detection means attached at a predetermined position of the stove, and distance detection means or imaging means attached toward the stove at a position above the stove.
Stove safety device. A stove safety device according to claim 1 or 2,
Furthermore, it comprises a combustion detection means capable of detecting that the burner is burning,
The control means stops output of an alarm from the alarm means when it is detected that the burner is not combusting based on a detection signal from the combustion detection means.
Stove safety device.

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