CN101881469A - Overheating air-burn preventing device of gas stove and preventing method - Google Patents
Overheating air-burn preventing device of gas stove and preventing method Download PDFInfo
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- CN101881469A CN101881469A CN2009100274706A CN200910027470A CN101881469A CN 101881469 A CN101881469 A CN 101881469A CN 2009100274706 A CN2009100274706 A CN 2009100274706A CN 200910027470 A CN200910027470 A CN 200910027470A CN 101881469 A CN101881469 A CN 101881469A
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- singlechip microprocessor
- control circuit
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- solenoid valve
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Abstract
The invention discloses an overheating air-burn preventing device of a gas stove and a preventing method. The overheating air-burn preventing device comprises a temperature sensor, a temperature sensor control circuit, a singlechip microprocessor, a main solenoid valve and a main solenoid valve control circuit, wherein the temperature sensor is used for detecting the temperature of the bottom of a cooker; the main solenoid valve and the main solenoid valve control circuit are arranged on a main gas pipe; in addition to the traditional low-temperature flameout defensive function, the device adds intelligent high temperature protection, has sensitive sense to the cooker temperature, prevents the air burn by overheating detection and overheating curve judgment so as to achieve the effect of preventing the air burn of majority of cookers, thereby effectively preventing fire accidents caused by abnormal high temperature of the air burn of the cooker, and protecting family property and personal safety all the way. The invention has high precision, simple and stable system and relative low cost and can meet the requirement of people on using the gas stove.
Description
Technical field
The present invention relates to overheated preventing dry combustion device of a kind of gas-cooker and control method thereof based on the singlechip microprocessor Based Intelligent Control.
Background technology
Gas-cooker is very universal in family uses, the gas-cooker of producing is on the market mechanically controlled the in the majority of combustion gas at present, and to overcome flame-out closing midway, be difficult the device and method that singlechip microprocessor intelligence prevents overheating air-burn temporarily, the difficult safety that ensures the user.
Summary of the invention
In order to overcome above-mentioned defective; the invention provides a kind of overheating air-burn preventing device of gas stove and prevent method; this device and method is except possessing traditional low temperature extinguish protection function; increased intelligent high temperature protection again; differentiate dual empty burning that prevent by overheated detecting and superheating curve; reach the effect that prevents empty burning to meet most of pans, and precision height, system's simple and stable.
The present invention for the technical scheme that solves its technical problem and adopt is:
A kind of overheating air-burn preventing device of gas stove, comprise the temperature sensor that is used to detect the pan bottom temp, the temperature sensor control circuit, singlechip microprocessor, be installed on main solenoid valve and main solenoid valve control circuit on the gas trunk line, described singlechip microprocessor is controlled described temperature sensor control circuit and is controlled the temperature that described temperature sensor detects the pan bottom, described temperature sensor control circuit passes to described singlechip microprocessor with the temperature data that collects and carries out formula analysis and processing, described singlechip microprocessor is carried out overheated distinguishing to the data after handling, and described singlechip microprocessor is controlled the keying of described main solenoid valve by the main solenoid valve control circuit.
Be provided with flame-out protection device; described flame-out protection device mainly is made up of thermocouple, the self-priming valve and the thermocouple control circuit that are installed on the gas subtube; described thermocouple detects gas-cooker and to fight and detections data are passed to described singlechip microprocessor analyze and handle, and described singlechip microprocessor is controlled the keying of self-priming valve by described thermocouple control circuit.Thermocouple is an assembly that temperature transition can be become voltage, the variation of its utilization heat electric power is surveyed gas-cooker and is caught fire, testing result is delivered to singlechip microprocessor, open self-priming valve and main solenoid valve, make the combustion gas circulation, when abnormal conditions occurring, in time close main solenoid valve, to guarantee safety.
Be provided with alarm, described alarm can send caution sound, and described alarm is controlled by described singlechip microprocessor.
Be provided with boosting unit, described boosting unit also constitutes for the booster circuit of singlechip microprocessor and relevant apparatus work by some dry cells with the dry cell boost in voltage.During concrete enforcement boosting unit with 2 joint 1.5V dry cells boost into 5V for singlechip microprocessor and relevant apparatus use.
Described singlechip microprocessor is provided with the data bank of the data of extracting for it.
Described singlechip microprocessor is provided with the timer to its timing.
A kind of gas-cooker overheating air-burn prevents method, comprises the steps:
1., temperature is gathered in good time: singlechip microprocessor control temperature sensor control circuit control temperature sensor is every the temperature of set time (Δ T) detection pan bottom, and the temperature sensor control circuit passes to singlechip microprocessor with the temperature data that collects;
2., formula analysis and processing: singlechip microprocessor is with the temperature (t of current collection
n) with the temperature (t that gathered last time
N-1) subtract each other and obtain temperature difference (Δ t), temperature difference (Δ t) is obtained the collecting temperature rate of rise (Δ YY) divided by the set time (Δ T);
3., superheating curve is differentiated: singlechip microprocessor compares the collecting temperature rate of rise (Δ YY) of set time with the normal temperature rate of rise (Δ Y) that configures, normal temperature rate of rise Δ Y is made as 1.11～1.16 temporarily for the test Synthetic Measuring Data, and this step is carried out once at least.
3. before superheating curve is differentiated and afterwards one of at least carry out overheated detecting in step: singlechip microprocessor is set with overtemperature point (t
m), overtemperature point can be set at 272 ℃, and singlechip microprocessor is with the temperature (t of current collection
n) and overtemperature point (t
m) compare, this step is carried out once at least.
When singlechip microprocessor was judged the gas-cooker overheating air-burn, singlechip microprocessor was closed main solenoid valve by the main solenoid valve control circuit.
The invention has the beneficial effects as follows: the present invention is except possessing traditional low temperature extinguish protection function; increased intelligent high temperature protection again; the pan temperature had sensitive perception; differentiate dual empty burning that prevent by overheated detecting and superheating curve; reach the effect that prevents empty burning to meet most of pans; thereby can effectively prevent the generation of the fire incident that causes because of empty the burnings grade of pan abnormal high temperature; whole process protection family's property and life safety; and precision height, system's simple and stable, relative cost are not high, satisfy people's demand safe in utilization to gas-cooker.
Description of drawings
Fig. 1 is the theory diagram of overheating air-burn preventing device of gas stove of the present invention;
Fig. 2 prevents the flow chart of method for gas-cooker overheating air-burn of the present invention;
Fig. 3 is the partial circuit schematic diagram (comprising thermocouple control circuit, temperature sensor control circuit, main solenoid valve control circuit and switching signal circuit) of overheating air-burn preventing device of gas stove of the present invention.
The specific embodiment
Embodiment: a kind of overheating air-burn preventing device of gas stove, comprise the temperature sensor that is used to detect the pan bottom temp, the temperature sensor control circuit, singlechip microprocessor, be installed on main solenoid valve and main solenoid valve control circuit on the gas trunk line, described singlechip microprocessor is controlled described temperature sensor control circuit and is controlled the temperature that described temperature sensor detects the pan bottom, described temperature sensor control circuit passes to described singlechip microprocessor with the temperature data that collects and carries out formula analysis and processing, described singlechip microprocessor is carried out overheated distinguishing to the data after handling, and described singlechip microprocessor is controlled the keying of described main solenoid valve by the main solenoid valve control circuit.
Be provided with flame-out protection device; described flame-out protection device mainly is made up of thermocouple, the self-priming valve and the thermocouple control circuit that are installed on the gas subtube; described thermocouple detects gas-cooker and to fight and detections data are passed to described singlechip microprocessor analyze and handle, and described singlechip microprocessor is controlled the keying of self-priming valve by described thermocouple control circuit.Thermocouple is an assembly that temperature transition can be become voltage, the variation of its utilization heat electric power is surveyed gas-cooker and is caught fire, testing result is delivered to singlechip microprocessor, open self-priming valve and main solenoid valve, make the combustion gas circulation, when abnormal conditions occurring, in time close main solenoid valve, to guarantee safety.
Be provided with alarm, described alarm can send caution sound, and described alarm is controlled by described singlechip microprocessor.
Be provided with boosting unit, described boosting unit also constitutes for the booster circuit of singlechip microprocessor and relevant apparatus work by some dry cells with the dry cell boost in voltage.Boosting unit with 2 joint 1.5V dry cells boost into 5V for singlechip microprocessor and relevant apparatus use.
Described singlechip microprocessor is provided with the data bank of the data of extracting for it.
Described singlechip microprocessor is provided with the timer to its timing.
A kind of gas-cooker overheating air-burn prevents method, comprises the steps:
1., temperature is gathered in good time: singlechip microprocessor control temperature sensor control circuit control temperature sensor is every the temperature of set time (Δ T) detection pan bottom, and the temperature sensor control circuit passes to singlechip microprocessor with the temperature data that collects;
2., formula analysis and processing: singlechip microprocessor is with the temperature (t of current collection
n) with the temperature (t that gathered last time
N-1) subtract each other and obtain temperature difference (Δ t), temperature difference (Δ t) is obtained the collecting temperature rate of rise (Δ YY) divided by the set time (Δ T);
3., superheating curve is differentiated: singlechip microprocessor compares the collecting temperature rate of rise (Δ YY) of set time with the normal temperature rate of rise (Δ Y) that configures, normal temperature rate of rise Δ Y is made as 1.11～1.16 temporarily for the test Synthetic Measuring Data, and this step is carried out once at least.
3. before superheating curve is differentiated and afterwards one of at least carry out overheated detecting in step: singlechip microprocessor is set with overtemperature point (t
m) (can be set at 272 ℃), singlechip microprocessor is with the temperature (t of current collection
n) and overtemperature point (t
m) compare, this step is carried out once at least.
When singlechip microprocessor was judged the gas-cooker overheating air-burn, singlechip microprocessor was closed main solenoid valve by the main solenoid valve control circuit.
The idiographic flow that gas-cooker overheating air-burn of the present invention prevents method is as shown in Figure 2: elder generation's initialization waits for that fault detect then has then alarm buzzer warning of fault, closes main solenoid valve when starting shooting at every turn; Then do not carry out equilibration time calculating if having, the ready to balance time finishes laggard trip temperature gathers in good time, and transmits singlechip microprocessor and carry out formula analysis and processing; Carry out overheated detecting after disposing, judged once more in 1 minute, then close main solenoid valve if also be higher than overtemperature point if be higher than the wait of overtemperature point; If be lower than and then carry out the superheating curve differentiation, the collecting temperature rate of rise of set time (Δ YY) compares with the normal temperature rate of rise (Δ Y) that configures, then wait for 1 minute and judge once more if Δ YY is higher than Δ Y, if Δ YY also is higher than Δ Y and then closes main solenoid valve, if Δ YY is lower than Δ Y and then returns fault detect.
The schematic diagram of the thermocouple control circuit of overheating air-burn preventing device of gas stove of the present invention, temperature sensor control circuit, main solenoid valve control circuit and switching signal circuit is as shown in Figure 3:
The thermocouple control circuit is made up of amplifier U2 and a series of components and parts, thermocouple becomes voltage with temperature transition, and singlechip microprocessor is delivered in the weak voltage amplification handled, open self-priming valve and main solenoid valve, make the combustion gas circulation, when abnormal conditions occurring, in time close main solenoid valve, to guarantee safety.
Temperature sensor perception pan bottom temp, an end connect singlechip microprocessor AD mouth, the temperature amount of gathering can be converted to digital quantity and carry out Treatment Analysis for singlechip microprocessor.This part is by drawing the drop-down and C4 composition (the R17 resistance is much smaller than R18) of R17, R18 on the R16.When overheated detecting, when being higher than overtemperature point, waited the meeting of biding one's time to do partly repair change in 1 minute, be higher than overtemperature to name a person for a particular job R18 as drop-down adjustment, prevent erroneous judgement.
(annotate: 3V is a supply voltage to the main solenoid valve control circuit, 3V1 is the chip input voltage of boosting, 5V is the back output voltage that boosts), when pressing down kitchen range mechanical knob switch, power supply divides two-way through switch: wherein road direction E5 charging, and make Q5 conducting Q7 base voltage form negative bias over the ground and make the Q7 conducting through R13, Q5,3V powers to boosting unit through Q7, after voltage rises to 5V, give singlechip microprocessor (U1) power supply; Go out the consecutive pulses signal at 18 human hair combing wastes immediately after the U1 initialization is finished, this pulse signal provides high level for the Q4 base stage through E2, Q2, R6, Q1, E4, thereby makes the Q4 conducting keep the negative bias of Q7 base stage, makes Q7 be in long logical state, and the power supply that realizes starting shooting is kept.E5 finishes because of charging and Q5 is ended quit work; The effect first of E3 in the circuit: utilize the ON time that the charging of electric capacity E3 is prolonged Q1; It two is: cooperate with E2 for preventing to produce misoperation because of interference.The Q6 base stage is delivered on another road, makes the Q6 conducting that 9 pin of U1 are put low level, and resetting as switch, (low level is an open state in control; High level is shutdown).Start is finished the 7 pin output high level of back U1 and is opened the main solenoid valve igniting, light a fire successfully after the 17 pin output low levels of U1 the main solenoid valve unlatching is kept in the Q3 conducting, when detecting fault, 17 pin of U1 are put high level ends Q3, closes main solenoid valve, the cut-out source of the gas.This loop can prevent from because of thunderbolt waits to spark system to be produced interference effectively.
Claims (9)
1. overheating air-burn preventing device of gas stove, it is characterized in that: comprise the temperature sensor that is used to detect the pan bottom temp, the temperature sensor control circuit, singlechip microprocessor, be installed on main solenoid valve and main solenoid valve control circuit on the gas trunk line, described singlechip microprocessor is controlled described temperature sensor control circuit and is controlled the temperature that described temperature sensor detects the pan bottom, described temperature sensor control circuit passes to described singlechip microprocessor with the temperature data that collects and carries out formula analysis and processing, described singlechip microprocessor is carried out overheated distinguishing to the data after handling, and described singlechip microprocessor is controlled the keying of described main solenoid valve by the main solenoid valve control circuit.
2. overheating air-burn preventing device of gas stove according to claim 1; it is characterized in that: be provided with flame-out protection device; described flame-out protection device mainly is made up of thermocouple, the self-priming valve and the thermocouple control circuit that are installed on the gas subtube; described thermocouple detects gas-cooker and to fight and detections data are passed to described singlechip microprocessor analyze and handle, and described singlechip microprocessor is controlled the keying of self-priming valve by described thermocouple control circuit.
3. overheating air-burn preventing device of gas stove according to claim 1 is characterized in that: be provided with alarm, described alarm can send caution sound, and described alarm is controlled by described singlechip microprocessor.
4. overheating air-burn preventing device of gas stove according to claim 1 is characterized in that: be provided with boosting unit, described boosting unit also constitutes for the booster circuit of singlechip microprocessor and relevant apparatus work by some dry cells with the dry cell boost in voltage.
5. overheating air-burn preventing device of gas stove according to claim 1 is characterized in that: described singlechip microprocessor is provided with the data bank of the data of extracting for it.
6. overheating air-burn preventing device of gas stove according to claim 1 is characterized in that: described singlechip microprocessor is provided with the timer to its timing.
7. a gas-cooker overheating air-burn prevents method, it is characterized in that: comprise the steps:
1., temperature is gathered in good time: singlechip microprocessor control temperature sensor control circuit control temperature sensor is every the temperature of set time detection pan bottom, and the temperature sensor control circuit passes to singlechip microprocessor with the temperature data that collects;
2., formula analysis and processing: singlechip microprocessor is subtracted each other the temperature of current collection and the temperature of gathering last time and is obtained temperature difference, and temperature difference is obtained the collecting temperature rate of rise divided by the set time;
3., superheating curve is differentiated: singlechip microprocessor compares the collecting temperature rate of rise of set time with the normal temperature rate of rise that configures, this step is carried out once at least.
8. gas-cooker overheating air-burn according to claim 7 prevents method, it is characterized in that: before 3. superheating curve is differentiated and afterwards one of at least carry out overheated detecting in step: singlechip microprocessor is set with the overtemperature point, singlechip microprocessor compares the temperature and the overtemperature point of current collection, and this step is carried out once at least.
9. prevent method according to claim 7 or 8 described gas-cooker overheating air-burns, it is characterized in that: when singlechip microprocessor was judged the gas-cooker overheating air-burn, singlechip microprocessor was closed main solenoid valve by the main solenoid valve control circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100274706A CN101881469A (en) | 2009-05-07 | 2009-05-07 | Overheating air-burn preventing device of gas stove and preventing method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100274706A CN101881469A (en) | 2009-05-07 | 2009-05-07 | Overheating air-burn preventing device of gas stove and preventing method |
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| Publication Number | Publication Date |
|---|---|
| CN101881469A true CN101881469A (en) | 2010-11-10 |
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ID=43053545
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|---|---|---|---|
| CN2009100274706A Pending CN101881469A (en) | 2009-05-07 | 2009-05-07 | Overheating air-burn preventing device of gas stove and preventing method |
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| CN104132379A (en) * | 2014-01-16 | 2014-11-05 | 傅银华 | Automatic starting timer closing gas structure of gas stove ignition adjusting knob |
| CN104279584A (en) * | 2013-07-11 | 2015-01-14 | 浙江工商职业技术学院 | Gas stove safety device |
| CN104296187A (en) * | 2014-10-23 | 2015-01-21 | 广东万和电气有限公司 | Burnout-preventing fire control sensor and gas cooker utilizing same |
| CN105737213A (en) * | 2016-04-21 | 2016-07-06 | 广东万和电气有限公司 | Gas stove with anti-burning prompting function |
| CN106678891A (en) * | 2016-12-02 | 2017-05-17 | 浙江美大实业股份有限公司 | Cooker and fire-preventing control method thereof |
| CN107477622A (en) * | 2017-09-27 | 2017-12-15 | 广东美的厨房电器制造有限公司 | Gas-cooker anti-dry control method, anti-dry control device for gas stove and gas-cooker |
| CN107504524A (en) * | 2017-09-08 | 2017-12-22 | 珠海格力电器股份有限公司 | Processing method, device, processor and the lampblack absorber of gas-cooker abnormal work |
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| CN108302563A (en) * | 2018-01-10 | 2018-07-20 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108332240A (en) * | 2018-01-10 | 2018-07-27 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108826376A (en) * | 2018-08-30 | 2018-11-16 | 李继明 | A kind of micro computer timing intelligent gas-burning stove |
| CN109044113A (en) * | 2018-06-21 | 2018-12-21 | 广东美的厨房电器制造有限公司 | For detecting method, processor, device and the storage medium of cooking apparatus dry combustion method |
| CN109691855A (en) * | 2017-10-20 | 2019-04-30 | 浙江绍兴苏泊尔生活电器有限公司 | Cooking apparatus and its detection method and device, storage medium, processor |
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| CN104279584A (en) * | 2013-07-11 | 2015-01-14 | 浙江工商职业技术学院 | Gas stove safety device |
| CN104132379A (en) * | 2014-01-16 | 2014-11-05 | 傅银华 | Automatic starting timer closing gas structure of gas stove ignition adjusting knob |
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| CN104296187B (en) * | 2014-10-23 | 2017-02-22 | 广东万和电气有限公司 | Burnout-preventing fire control sensor and gas cooker utilizing same |
| CN105737213A (en) * | 2016-04-21 | 2016-07-06 | 广东万和电气有限公司 | Gas stove with anti-burning prompting function |
| CN106678891B (en) * | 2016-12-02 | 2019-04-12 | 浙江美大实业股份有限公司 | A kind of kitchen range and its fire-proof control method |
| CN106678891A (en) * | 2016-12-02 | 2017-05-17 | 浙江美大实业股份有限公司 | Cooker and fire-preventing control method thereof |
| CN107504524A (en) * | 2017-09-08 | 2017-12-22 | 珠海格力电器股份有限公司 | Processing method, device, processor and the lampblack absorber of gas-cooker abnormal work |
| CN107477622A (en) * | 2017-09-27 | 2017-12-15 | 广东美的厨房电器制造有限公司 | Gas-cooker anti-dry control method, anti-dry control device for gas stove and gas-cooker |
| CN109691855A (en) * | 2017-10-20 | 2019-04-30 | 浙江绍兴苏泊尔生活电器有限公司 | Cooking apparatus and its detection method and device, storage medium, processor |
| CN109691855B (en) * | 2017-10-20 | 2022-10-04 | 浙江绍兴苏泊尔生活电器有限公司 | Cooking appliance, detection method and device thereof, storage medium and processor |
| CN108302563A (en) * | 2018-01-10 | 2018-07-20 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108332240A (en) * | 2018-01-10 | 2018-07-27 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108302562A (en) * | 2018-01-10 | 2018-07-20 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108253463A (en) * | 2018-01-10 | 2018-07-06 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108332240B (en) * | 2018-01-10 | 2019-06-04 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108253463B (en) * | 2018-01-10 | 2019-06-28 | 广东美的厨房电器制造有限公司 | Gas-cooker and its control method |
| CN108302562B (en) * | 2018-01-10 | 2020-04-03 | 广东美的厨房电器制造有限公司 | Gas stove and control method thereof |
| CN108302563B (en) * | 2018-01-10 | 2020-08-04 | 广东美的厨房电器制造有限公司 | Gas stove and control method thereof |
| CN109044113A (en) * | 2018-06-21 | 2018-12-21 | 广东美的厨房电器制造有限公司 | For detecting method, processor, device and the storage medium of cooking apparatus dry combustion method |
| CN108826376A (en) * | 2018-08-30 | 2018-11-16 | 李继明 | A kind of micro computer timing intelligent gas-burning stove |
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Application publication date: 20101110 |