KR101723601B1 - An apparatus and method to predict and detect a fire on cooking ranges - Google Patents

Abstract

The present invention relates to an apparatus and method for detecting fire prediction of a cooking appliance, and more particularly, to a remote sensing device for sensing the temperature of a cooking container, comprising: a remote temperature sensor for sensing a temperature of the cooking container; And a controller programmed to calculate a warning time based on the temperature change pattern and to warn the user when the warning time is reached.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a fire detection apparatus,

The present invention relates to an apparatus and method for detecting fire prediction in a cooking apparatus, and more particularly, to a fire detection apparatus and method in a cooking apparatus having a fire detection function and a function of notifying a user of a heating state of food in stages.

In general, a conventional fire detection system is implemented in such a manner that smoke is detected or a large temperature change is sensed, thereby detecting a situation after a fire has already occurred and causing a delayed situation.

As a part of the fire prevention system, there is provided an overheating prevention device to enable quick response through a kitchen hood, a gas range itself, or a separate device. Such an overheat prevention device senses the temperature of the cooking vessel through a temperature sensor, and cuts off the gas supply by a set procedure to help the automatic fire extinguishing of the gas range.

In this connection, as disclosed in Korean Patent Publication No. 10-1431056, Korean Patent Registration No. 10-1130328, Korean Patent Laid-open Publication No. 2013-0059584, etc.

In the above-mentioned prior art, a temperature sensor is installed in a gas rangeization port, the temperature sensor directly contacts the cooking container to diagnose an overheated state, and when gas is detected as a dangerous temperature, ) Or notify of danger warning.

However, there is a problem in that it is difficult to expect a coping effect of various variables on various parameters because the procedure or function of the control unit (microprocessor, etc.) which diagnoses the overheating state of the cooking vessel, which is a core function, have.

There is also a concern that the cooking may be interrupted due to the situation where the gas supply is interrupted in consideration of only the temperature of the cooking container even in a situation where the user can determine the situation.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a fire detection apparatus capable of predicting a fire that may occur due to burning of food or the like in a cooking process, .

According to an aspect of the present invention, there is provided an apparatus and method for predicting a fire in a cooking device for cooking, including a remote temperature sensor for sensing a temperature of a cooking container, a sensing value for a sensed temperature from the remote temperature sensor, And a controller which is programmed to check a temperature change pattern based on the sensed value, calculate an alert time based on the temperature change pattern, and alert the user when the alert time is reached.

According to another aspect of the present invention, there is provided a method for measuring a temperature of a food, comprising the steps of: measuring a temperature of a cooking container or a food from a remote temperature sensor during cooking; analyzing a temperature variation pattern for analyzing a pattern of the sensed temperature; The start temperature and the start time of the rising pattern are set as the starting point and the rising start time, and when the rising pattern is completed and the horizontal pattern is seen, the ending temperature and time of the rising pattern are set as the boiling point and the boiling time, A temperature and time setting step of calculating a preliminary warning time and a final warning time based on the time and the temperature, respectively, and a warning and warning when the preliminary warning time is reached, And a step of controlling the time-based operation for forcibly turning off the display device.

The preliminary warning time is calculated as a sum of a boiling time and a burning time predicting function, and the burning time predicting function is calculated as a product of a rising time obtained by subtracting a start time from a boiling time and a preliminary warning constant.

Further, the final warning time is calculated as the time when another pattern of temperature rise is seen in the horizontal pattern.

The apparatus and method for detecting fire prediction of a cooker in the present invention can prevent or prevent a fire in advance by predicting or promptly detecting a fire caused by a user's carelessness when using a cooking device.

In addition, the automatic notification function is provided so that the user can cope with the situation according to the stage condition such as the boiling point of the water in the cooking process and the elapsed time after the boiling, and by providing the self-shutoff function in the emergency situation, It is effective.

1 is a plan view showing a configuration of a cooking device fire prediction sensing apparatus according to an embodiment of the present invention.
2 is a plan view showing a configuration of a cooking device fire prediction detecting device according to an embodiment of the present invention.
FIG. 3 is a graph showing a pattern change according to a temperature change in a cooking vessel according to an embodiment of the present invention. FIG.
4 is a graph showing a fire alarm step according to an embodiment of the present invention
5 is a graph showing a final fire alarm step according to an embodiment of the present invention
6 is a flowchart showing a fire prediction detection method of a cooking device according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of an apparatus and method for detecting fire prediction of a cooking device according to the present invention will be described in detail with reference to the accompanying drawings.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 and FIG. 2 are plan views of a cooking device fire prediction detecting apparatus according to an embodiment of the present invention.

6 is a flowchart illustrating a method of detecting a fire prediction of a cooking device according to an embodiment of the present invention. FIG. 6 is a flowchart illustrating a method of detecting a fire prediction of a cooking device according to an embodiment of the present invention. to be.

First, the fire prediction sensing apparatus 100 of the present invention comprises a remote temperature sensor 110, an ambient temperature sensor 120, and a controller 130.

The fire prediction sensing apparatus 100 is provided to measure the temperature of the upper surface and the bottom surface of the cooking vessel 300 and the temperature of the food placed on the cooking vessel 210 from one side of the cooking vessel 200, Although it does not act as an obstacle to the temperature measurement regardless of the position of the apparatus 200, it is preferable that the apparatus 200 is located on the back surface or the side surface of the cooking apparatus 200 in consideration of the cooking environment.

The remote temperature sensor 110 is located at a height that is capable of measuring the temperature of the cooking container 300 seated on the firebox 210 of the cooking appliance 200 and is provided with a noncontact temperature sensor such as an infrared temperature sensor, Sensors, and the like, and may be provided in a large number depending on the installation environment of the cooking apparatus 200.

The ambient temperature sensor 120 and the controller 130 are located at a distance close to the remote temperature sensor 110. The ambient temperature sensor 120 measures the ambient temperature of the cooking appliance 200, The controller 130 provides cooking state information and a warning message to the user and turns off the cooking appliance 200.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the operation and effect of the apparatus and method for detecting fire prediction of a cooking device according to the present invention will be described with reference to the accompanying drawings.

FIG. 3 to FIG. 5 are graphs illustrating changes in temperature of the cooking container 300 measured by the fire prediction sensing apparatus 100. The x-axis represents time and the y-axis represents temperature.

The plurality of black dots shown in the above figure represent the temperature of the cooking container 300 over time, which is referred to as a temperature sample of each time.

Next, a method of detecting the time when the food is boiled will be described in detail as follows.

The fire prediction sensing apparatus 100 periodically measures the temperature of the cooking container 300 after the start of cooking to determine whether the food is warming, boiling, or burning.

That is, the heating state of the food is divided into three stages to detect a pattern corresponding to the temperature rise of the cooking vessel 300.

First, the rising pattern S10 generated as the temperature is continuously raised until the boiling point D2 is reached as the water is warmed up, and then the horizontal pattern S20 (S20) ).

The rising pattern S10 may be detected by checking whether a trend line for a predetermined number of points has a given slope. The slope of the trend line for a predetermined number of points is " 0 " &Quot; can be detected.

By storing the measured values of the temperature samples with respect to the temperature of the cooking container 300, it can be utilized as data of pattern analysis at a later time. Here, the temperature measurement interval may be set to 1 second, 5 seconds, 10 seconds, 20 seconds, or the like, depending on the use environment.

Hereinafter, embodiments of the present invention, which operate step by step utilizing the above-described temperature samples, will be described in more detail with reference to equations.

라고 가정하면

는 시간,

는 온도이다.

에서

시간까지의 온도샘플에 대한 추세선을

라고 할 때, 추세선은 다음 수식으로 구현할 수 있다.The coordinates of the ith temperature sample are

Assuming

Time,

Is the temperature.

in

Trend lines for temperature samples up to time

, The trend line can be implemented by the following equation.

The coefficient a of the above formula is the slope of the trend line. It draws the boiling horizon (L20) closer to '0' and draws the upward line (L10) as the positive number larger than '0'.

The following equation represents an error, which is a measure of how much a given number of temperature samples are scattered on a trendline.

The smaller the error of the above equation is, the more reliable the data is regarded as a sample close to a straight line and the more reliable the data is, so that it is a criterion which can clearly determine whether the temperature pattern is the rising line L10 or the horizontal line L20.

Next, FIG. 4 shows a start point D1, a boiling point D2, a boiling time T3, a first notification A1, a second notification A2, and a second notification A2 after detection of the rising pattern S10 and the horizontal pattern S20. , And a preliminary warning time (T4).

The point at which the rising line L10 extending the rising pattern S10 and the boiling horizontal line L20 extending the horizontal pattern S20 meet becomes the boiling point D2 and the boiling point D2 from the starting point D1 to the boiling point D2 Is the rise time T2.

The starting point D1 means that the heating is started and the starting point D1 is obtained as an intersection of the rising line L10 and the straight line y = C 'extending the rising pattern S10. The start temperature C may be a temperature before the temperature rises or a value of the ambient temperature sensor 120.

As described above, the warning procedure according to the heating situation is shown step by step based on each set variable.

First, the first preset value (x1 seconds) after the boiling time (T3) is referred to as a first notification A1, and the user is informed via the controller 130 of the notification. For example, if three minutes have elapsed after boiling, the user can be informed that three minutes have passed and can help the cooking process.

Similarly to the above, the second notification A2 after the second preset time x2 seconds at the boiling time T3 is notified to the user through the controller 130 of the notice. In this way, it is possible to provide notifications for a plurality of sections such as the third, fourth, and so on.

The rising time (T2) is the time difference between the start of boiling at the time when the food starts to warm up. That is, the time obtained by subtracting the start time T1 from the boiling time T3 is the rise time T2.

The burning time of the food is related to the rise time (T2) of the food. The ride time f, which takes the rise time T2 as a factor, provides the preliminary warning time T4. That is, the burning time f can be simply implemented by multiplying the rising time T2 by a preliminary warning constant, which is expressed by the following equation.

Burn time (f) = rise time (T2) * preliminary warning constant

Here, the preliminary warning constant is a variable tunable number that can be set according to the thermal power of the cooking apparatus 200 or the capacity of the cooking vessel 300, and is not a fixed value.

Then, the preliminary warning time T4 can be obtained by the following equation.

Preliminary warning time (T4) = boiling time (T3) + burning time (f)

FIG. 5 shows a method for determining when a food is burned, that is, when a probability of occurrence of a fire becomes highest.

After the fire prediction sensor 100 detects the boiling time T3, the boiling horizontal line L20 continues to gradually rise, and a pattern of temperature rise different from the rising pattern S20, that is, When the elevation line L30 is detected, it is judged that food is burning. Here, the time at which the riding line L30 is sensed is referred to as a final warning time T5.

In the final warning time T5, a warning message may be notified to the user through the controller 130 or the cooking appliance 200 may be forcibly turned off. Here, the warning message can be delivered through various methods such as voice or visual effects through a separate display. As the temperature increases, the risk of fire increases. Therefore, it is desirable that the warning message of the step level is strengthened so that the alert level can be generated more than the previous level.

That is, referring to FIG. 6, the overall apparatus and method for detecting fire prediction of a cooker according to the present invention will be described.

First, the temperature of the cooking container 300 or the food is measured (S101), and the pattern of the measured temperature change is analyzed (S103). Then, a warning time is calculated based on the measured temperature and time (S105), and the operation is controlled according to the warning time set for the calculated value (S107). At the time when the final warning time T5 is reached, the warning or the cooking appliance 200 is forcibly turned off (S109).

As described above, according to the present invention, in order to prevent a fire that may occur during the cooking process, the user is notified of the progress of heating step by step, thereby providing a more stable cooking environment through efficient coping according to the situation .

That is, the cooking device fire prediction sensing apparatus 100 of the present invention detects the time T3 of boiling water when cooking food, grasps the time lapse after boiling water, and controls the controller 130 Notify the user. If it is detected that the probability of fire is high due to the start of food burning due to most of the water evaporation, the cooking device is forcibly turned off with a warning message. Thus, it can be said that the fire detection apparatus is provided with a function that permits intervention in a situation where the user can sufficiently control the cooking at the time of cooking, while forcibly interrupting at the time of emergency, and has advantages distinct from the conventional invention.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention.

100. Fire prediction sensor
110. Remote temperature sensor
120. Ambient temperature sensor
130. Controller
200. Cooking equipment
210. Crater
300. Cooking container

Claims (5)

delete A temperature measuring step of sensing the temperature of the cooking container (300) or the food from the remote temperature sensor (110) at the time of cooking;
A temperature change pattern analysis step of analyzing a pattern of the sensed temperature change;
(C) and time of the rising pattern (S10) are set to a starting point (D1) and a rising start time (T1) when the pattern for the temperature change shows the rising pattern (S10) (S10) is completed and the horizontal pattern (S20) is displayed, the end temperature and the end time of the rising pattern (S10) are set as a boiling point (D2) and a boiling time (T3) A temperature and time setting step of calculating notifications A1 and A2, a preliminary warning time T4 and a final warning time T5 based on the start temperature T2 and the start temperature C and the end temperature;
And a time-wise operation control step of providing an alarm when the preliminary warning time T4 is reached and forcibly turning off the warning or cooking appliance 200 when the final warning time T5 is reached,
The preliminary warning time T4 is calculated as the sum of the boiling time T3 and the burning time f,
The burning time f is calculated as a product of a rise time T2 obtained by subtracting the start time T1 from the boiling time T3 and a preliminary warning constant,
Wherein the notification (A1, A2) is provided when it is confirmed that a predetermined time has elapsed in the boiling time (T3). delete delete delete

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