CN111219749A - Dry burning prevention control method and system for kitchen range - Google Patents
Dry burning prevention control method and system for kitchen range Download PDFInfo
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- CN111219749A CN111219749A CN201911017243.5A CN201911017243A CN111219749A CN 111219749 A CN111219749 A CN 111219749A CN 201911017243 A CN201911017243 A CN 201911017243A CN 111219749 A CN111219749 A CN 111219749A
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- 230000002265 prevention Effects 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000000630 rising effect Effects 0.000 claims abstract description 16
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000010411 cooking Methods 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 238000009795 derivation Methods 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000006870 function Effects 0.000 description 31
- 238000004590 computer program Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012067 mathematical method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/126—Arrangement or mounting of control or safety devices on ranges
Abstract
The technical scheme of the invention discloses a dry burning prevention control method for a kitchen range, which comprises the following steps: collecting a plurality of varying temperature values TwAnd time Tt(ii) a For the temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function; when a temperature rising point is detected, obtaining a derivative function f' (x) by deriving a second fitting function, and setting a temperature rising speed value S; when f' (x) is judged>And S, when the duration time of the temperature rise is longer than or equal to the set time, performing dry burning prevention protection on the stove. The temperature change condition of the heating process is dynamically monitored, the accuracy of judging the dry-burning state is improved, and food carbonization and pan damage are avoided.
Description
Technical Field
The invention relates to the field of gas cookers, in particular to a dry-burning prevention control method and a dry-burning prevention control system for a cooker.
Background
In the cooking process of the household gas stove, potential safety hazards often exist because the fire is forgotten to be turned off and the pot is dried. In order to eliminate the potential safety hazard caused by dry burning and long-time no-sitting of a pot, dry burning prevention type gas stoves are introduced by various manufacturers on the market. The principle is that a temperature sensor is added at the bottom of the pot for sensing the temperature of the bottom of the pot and making a judgment. The commercial products often set a relatively high temperature as a dry-fire protection point. Because the material of edible material is different with the pan material, the protection temperature point of setting up of cage is general, can cause following problem: the cooking characteristics of the food materials cannot be considered, so that the food materials are dry-burned and carbonized; the cookware has different materials and thicknesses and different heat transfer characteristics, which often causes premature protection; the anti-dry heating protector has long reset waiting time and can not cook continuously.
Disclosure of Invention
The invention mainly aims to provide a dry-burning prevention control method and a dry-burning prevention control system for a stove, which are used for dynamically monitoring the temperature change condition in the heating process, improving the accuracy of judging the dry-burning state and avoiding food carbonization and damage to the pot.
In order to achieve the purpose, the invention provides an anti-dry burning control method for a stove.
A control method for preventing dry burning of a kitchen range comprises the following steps:
collecting a plurality of varying temperature values TwAnd time Tt；
For the temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function;
when a temperature rising point is detected, obtaining a derivative function f' (x) by deriving a second fitting function, and setting a temperature rising speed value S;
and when the f' (x) > S is judged and the duration time of the temperature rise is greater than or equal to the set time, performing dry burning prevention protection on the stove.
In one embodiment, the method further comprises:
setting a maximum limit temperature value TmaxWhen the temperature value T is measuredwGreater than or equal to TmaxThen, entering temperature abnormal protection for 10 seconds;
prompting to alarm and closing the electromagnetic valve to cut off the gas and extinguish the fire.
In one embodiment, the first fitting function is: y is ax3+bx2+ cx + d, where x is time, y is temperature, and a, b, c, d are parameters.
In one embodiment, the second fitting function is: y is ax + b, where a and b are parameters.
In one embodiment, the step of performing dry-burning prevention protection on the cooker comprises the following steps:
prompting alarm and extinguishing fire when the electromagnetic valve on the pipe wall is cut off.
A cooktop dry-fire prevention control system, the system comprising:
an acquisition module for acquiring a plurality of varying temperature values TwAnd time Tt；
A fitting module for fitting the temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function;
the detection module is used for obtaining a derivative function f' (x) by derivation of the second fitting function when a temperature rising point is detected, and setting a temperature rising speed value S;
and the dry-burning protection module is used for executing dry-burning protection on the cooker when the f' (x) > S is judged and the duration time of temperature rise is greater than or equal to the set time.
In one embodiment, the system further comprises:
an abnormality protection module for setting a maximum limit temperature value TmaxWhen the temperature value T is measuredwGreater than or equal to TmaxThen, entering temperature abnormal protection for 10 seconds;
and the flameout module is used for prompting alarm and closing the electromagnetic valve to cut off gas and flameout.
In one embodiment, the first fitting function is: y is ax3+bx2+ cx + d, where x is time, y is temperature, and a, b, c, d are parameters.
In one embodiment, the second fitting function is: y is ax + b, where a and b are parameters.
In one embodiment, the step of performing dry-burning prevention protection on the cooker comprises the following steps:
and the alarm module is used for prompting alarm and extinguishing the gas failure of the electromagnetic valve on the pipe wall.
Has the advantages that:
the technical scheme of the invention discloses a dry burning prevention control method for a kitchen range, which comprises the following steps: collecting a plurality of varying temperature values TwAnd time Tt(ii) a For the temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function; when a temperature rising point is detected, obtaining a derivative function f' (x) by deriving a second fitting function, and setting a temperature rising speed value S; when f' (x) is judged>And S, when the duration time of the temperature rise is longer than or equal to the set time, performing dry burning prevention protection on the stove. The temperature change condition of the heating process is dynamically monitored, the accuracy of judging the dry-burning state is improved, and food carbonization and pan damage are avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a flow chart of a method of a control method for preventing dry burning of a kitchen range;
FIG. 2 is a system block diagram of a stove dry burning prevention control system of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Referring to fig. 1, a method for controlling dry combustion prevention of a kitchen range includes:
s100: collecting a plurality of varying temperature values TwAnd time Tt；
In this embodiment, the temperature Tw and the time Tt are recorded for each change from the start of ignition of the igniter to the start of the internal clock, and the function y is fitted to ax for each 4 sets of data3+bx2+ cx + d; wherein x is time and y is temperature.
S200: for the temperature value T according to a first fitting functionwFitting is performed byThe first fitting function is subjected to derivation to obtain a temperature rise starting point;
in this embodiment, the first fitting function is y ═ ax3+bx2+ cx + d, function y being ax3+bx2The second derivative is taken as + cx + d, provided that f' (x)>0, is the temperature jump rise starting point.
S300: when a temperature rising point is detected, obtaining a derivative function f' (x) by deriving a second fitting function, and setting a temperature rising speed value S;
in this embodiment, the second fitting function is y ═ a1x + b1, and the first derivative is taken, if f' (x) >0, indicating that the temperature is increasing at an acceleration; according to the type and cooking mode of the food material, a temperature rise speed value S >0 can be set, and when the food material enters a dry-burning state, the current speed of food material carbonization can be judged according to the values f' (x) > S. According to the test data, the lower the oil content of the food material, the higher the carbonization speed and the larger the S value.
S400: and when the f' (x) > S is judged and the duration time of the temperature rise is greater than or equal to the set time, performing dry burning prevention protection on the stove.
In this embodiment, according to the test data, when the duration Ts of f' (x) > S is greater than or equal to the Tset setting time, dry combustion protection is performed, and an alarm is prompted, and the solenoid valve is closed, gas is cut off, and flameout is performed.
It should be noted that curve fitting is commonly called as a pull curve, which is a representation way of substituting existing data into a mathematical expression through a mathematical method, and if there are more than n +1 constraints (n is the order of a polynomial), polynomial fitting can still be used.
Fitting a straight line or a polynomial curve: the equation y is a line in the cartesian plane a1x + b1, and the slope of the line is a. Because any two points can determine a straight line, a polynomial of degree no more than 1 can always be found to string any two points where the x values are different.
If the number of the multiple expression is increased to 2, y is ax2+ bx + c then, given 3 points of different x values, there will always be a polynomial of degree no more than 2 that can string them.
If it is notIncreasing the number of the multiple expression to 3, y-ax3+bx2+ cx + d then, given 4 points of different x values, there will always be a polynomial of degree no more than 3 that can string them.
In one embodiment, the method further comprises:
setting a maximum limit temperature value TmaxWhen the temperature value T is measuredwGreater than or equal to TmaxThen, entering temperature abnormal protection for 10 seconds;
prompting to alarm and closing the electromagnetic valve to cut off the gas and extinguish the fire.
Considering the complexity of the cooking scenario, a maximum limit temperature value T needs to be setmaxE.g., 290 degrees, for handling abnormal operation. Limit temperature value TmaxMonitoring in real time from the start of the first igniter step, when the temperature T is measuredw≥TmaxAnd if the temperature lasts for about 10 seconds, entering temperature abnormal protection, prompting to alarm, closing the electromagnetic valve, cutting off gas and extinguishing.
In one embodiment, the first fitting function is: y is ax3+bx2+ cx + d, where x is time, y is temperature, and a, b, c, d are parameters.
In one embodiment, the second fitting function is: a1x + b1, wherein a1 and b1 are parameters.
In one embodiment, the step of performing dry-burning prevention protection on the cooker comprises the following steps:
prompting alarm and extinguishing fire when the electromagnetic valve on the pipe wall is cut off.
Referring to fig. 2, a dry-burning prevention control system for a kitchen range, the system comprising:
an acquisition module 10 for acquiring a plurality of varying temperature values TwAnd time Tt；
A fitting module 20 for fitting said temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function;
the detection module 30 is configured to, when a temperature rise point is detected, derive a derivative function f' (x) by deriving a second fitting function, and set a temperature rise speed value S;
and the dry-burning protection module 40 is used for performing dry-burning protection on the cooker when the f' (x) > S is judged and the duration time of the temperature rise is greater than or equal to the set time.
In one embodiment, the system further comprises:
an abnormality protection module for setting a maximum limit temperature value TmaxWhen the temperature value T is measuredwGreater than or equal to TmaxThen, entering temperature abnormal protection for 10 seconds;
and the flameout module is used for prompting alarm and closing the electromagnetic valve to cut off gas and flameout.
In one embodiment, the first fitting function is: y is ax3+bx2+ cx + d, where x is time, y is temperature, and a, b, c, d are parameters.
In one embodiment, the second fitting function is: a1x + b1, wherein a1 and b1 are parameters.
In one embodiment, the step of performing dry-burning prevention protection on the cooker comprises the following steps:
and the alarm module is used for prompting alarm and extinguishing the gas failure of the electromagnetic valve on the pipe wall.
The technical scheme of the invention discloses a dry burning prevention control method for a kitchen range, which comprises the following steps: collecting a plurality of varying temperature values TwAnd time Tt(ii) a For the temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function; when a temperature rising point is detected, obtaining a derivative function f' (x) by deriving a second fitting function, and setting a temperature rising speed value S; when f' (x) is judged>And S, when the duration time of the temperature rise is longer than or equal to the set time, performing dry burning prevention protection on the stove. The temperature change condition of the heating process is dynamically monitored, the accuracy of judging the dry-burning state is improved, and food carbonization and pan damage are avoided.
All or part of the above embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented using a software program, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. The procedures or functions described in accordance with the embodiments of the application, in whole or in part, result when the computer program instructions are loaded and executed on a computer. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-only memory (ROM), or the like.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A control method for preventing dry burning of a kitchen range is characterized by comprising the following steps:
collecting a plurality of varying temperature values TwAnd time Tt；
For the temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function;
when a temperature rising point is detected, obtaining a derivative function f' (x) by deriving a second fitting function, and setting a temperature rising speed value S;
and when the f' (x) > S is judged and the duration time of the temperature rise is greater than or equal to the set time, performing dry burning prevention protection on the stove.
2. The cooking range dry burning prevention control method according to claim 1, further comprising:
setting a maximum limit temperature value TmaxWhen the temperature value T is measuredwGreater than or equal to TmaxThen, entering temperature abnormal protection for 10 seconds;
prompting to alarm and closing the electromagnetic valve to cut off the gas and extinguish the fire.
3. The cooktop dry-burning prevention control method of claim 1, wherein the first fitting function is: y is ax3+bx2+ cx + d, where x is time, y is temperature, and a, b, c, d are parameters.
4. The cooktop dry-burning prevention control method of claim 1, wherein the second fitting function is: a1x + b1, wherein a1 and b1 are parameters.
5. The cooktop dry-burning prevention control method of claim 1, wherein the step of performing dry-burning prevention protection on the cooktop comprises:
prompting alarm and extinguishing fire when the electromagnetic valve on the pipe wall is cut off.
6. A cooking utensils dry combustion preventing control system which is characterized in that, the system includes:
an acquisition module for acquiring a plurality of varying temperature values TwAnd time Tt；
A fitting module for fitting the temperature value T according to a first fitting functionwFitting, and obtaining a temperature rise starting point by differentiating the first fitting function;
the detection module is used for obtaining a derivative function f' (x) by derivation of the second fitting function when a temperature rising point is detected, and setting a temperature rising speed value S;
and the dry-burning protection module is used for executing dry-burning protection on the cooker when the f' (x) > S is judged and the duration time of temperature rise is greater than or equal to the set time.
7. The cooktop dry-fire prevention control system of claim 6, further comprising:
an abnormality protection module for setting a maximum limit temperature value TmaxWhen the temperature value T is measuredwGreater than or equal to TmaxThen, entering temperature abnormal protection for 10 seconds;
and the flameout module is used for prompting alarm and closing the electromagnetic valve to cut off gas and flameout.
8. The cooktop dry-burning prevention control system of claim 6, wherein the first fitting function is: y is ax3+bx2+ cx + d, where x is time, y is temperature, and a, b, c, d are parameters.
9. The cooktop dry-burning prevention control system of claim 6, wherein the second fitting function is: a1x + b1, wherein a1 and b1 are parameters.
10. The cooktop dry-burning prevention control system of claim 6, wherein the step of performing dry-burning prevention protection on the cooktop comprises:
and the alarm module is used for prompting alarm and extinguishing the gas failure of the electromagnetic valve on the pipe wall.
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| CN201911017243.5A CN111219749A (en) | 2019-10-24 | 2019-10-24 | Dry burning prevention control method and system for kitchen range |
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| CN201911017243.5A CN111219749A (en) | 2019-10-24 | 2019-10-24 | Dry burning prevention control method and system for kitchen range |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112254181A (en) * | 2020-10-21 | 2021-01-22 | 珠海格力电器股份有限公司 | Dry burning prevention control method and control device |
| CN113551267A (en) * | 2021-07-14 | 2021-10-26 | 珠海格力电器股份有限公司 | Dry burning prevention protection method, device, equipment, storage medium and gas stove |
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Application publication date: 20200602 |