CN112649565B - Calibration method for oxygen sensor of cooking equipment - Google Patents
Calibration method for oxygen sensor of cooking equipment Download PDFInfo
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- CN112649565B CN112649565B CN202011188051.3A CN202011188051A CN112649565B CN 112649565 B CN112649565 B CN 112649565B CN 202011188051 A CN202011188051 A CN 202011188051A CN 112649565 B CN112649565 B CN 112649565B
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- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 210
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 210
- 239000001301 oxygen Substances 0.000 title claims abstract description 210
- 238000010411 cooking Methods 0.000 title claims abstract description 182
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000004140 cleaning Methods 0.000 claims abstract description 24
- 230000007613 environmental effect Effects 0.000 claims abstract description 21
- 238000012937 correction Methods 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims description 47
- 238000001514 detection method Methods 0.000 description 9
- 238000010025 steaming Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000004891 communication Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 238000007791 dehumidification Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000010408 sweeping Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0006—Calibrating gas analysers
Abstract
The invention discloses a method for calibrating an oxygen sensor of cooking equipment, which comprises the following steps: s1: starting the cooking equipment and starting to record the use time of the cooking equipment; s2: judging whether the cooking equipment finishes the calibration of the initial value A of the oxygen sensor, if not, executing an oxygen sensor calibration strategy and transferring to the next step, and if so, executing an oxygen sensor attenuation deviation correction strategy; s3: starting to preheat the oxygen sensor, and simultaneously carrying out environmental cleaning on the cooking cavity; s4: completing environmental cleaning and preheating of the oxygen sensor; s5: judging whether the service time of the cooking equipment is greater than a reference value, if so, turning to the next step, and if not, continuing to execute the step S5; s6: collecting and recording the data of the oxygen sensor, and simultaneously recording the collection times; s7: and comparing the use time of the cooking equipment with the preset time or the collection times with the preset times, and determining whether to acquire and store the initial value A of the oxygen sensor based on the comparison result. The invention can correct the oxygen sensor deviation caused by the ambient atmospheric pressure.
Description
Technical Field
The invention relates to the technical field of kitchen appliances, in particular to a calibration method for an oxygen sensor of cooking equipment.
Background
With the increasing popularization of the steam oven, people develop from the direction of simple functional requirements to higher functional levels, and higher requirements are put forward on the cooking quality. At present, the humidity control common steaming and baking oven for steaming and baking is implemented, the existing humidity measurement sensor comprises a humidity sensitive capacitor, a humidity sensitive resistor, an oxygen sensor and the like, and the oxygen sensor is used for detecting the humidity of the steaming oven by resisting severe environment and controlling the humidity so as to achieve the optimal cooking effect. Because the altitude is different, the oxygen content in the air is also different, if oxygen sensor regard as the standard value with the factory setting value, can influence wet steam box humidity and detect the accuracy.
In addition, after the oxygen sensor is used for a long time, the detection precision tends to be reduced, and the accuracy of the humidity detection of the cooking cavity and the cooking effect are further influenced.
Disclosure of Invention
The invention aims to solve at least one of the problems in the prior related art to a certain extent, and therefore the invention provides an oxygen sensor calibration method of cooking equipment, which can correct oxygen concentration deviation caused by ambient atmospheric pressure and improve the detection accuracy of an oxygen sensor.
According to the oxygen sensor calibration method of the cooking equipment, the calibration method is realized through the following technical scheme:
an oxygen sensor calibration method of a cooking device, the cooking device comprising a cooking cavity, a heating module, an oxygen sensor and a control module, wherein the oxygen sensor calibration method comprises the following steps:
s1: starting the cooking equipment and starting to record the use time of the cooking equipment;
s2: judging whether the cooking equipment finishes the calibration of the initial value A of the oxygen sensor, if not, executing an oxygen sensor calibration strategy and transferring to the next step, and if so, executing an oxygen sensor attenuation deviation correction strategy;
s3: starting to preheat the oxygen sensor, and simultaneously carrying out environmental cleaning on the cooking cavity;
s4: completing environmental cleaning and preheating of the oxygen sensor;
s5: judging whether the service time of the cooking equipment is greater than a reference value, if so, turning to the next step, and if not, continuing to execute the step S5;
s6: collecting and recording the data of the oxygen sensor, and simultaneously recording the collection times;
s7: and comparing the use time of the cooking equipment with the preset time or the collection times with the preset times, and determining whether to acquire and store the initial value A of the oxygen sensor based on the comparison result.
In some embodiments, the determining whether the cooking device has completed the calibration of the initial value a of the oxygen sensor is performed by determining whether the control module stores the initial value a of the oxygen sensor, if so, determining that the calibration of the initial value a of the oxygen sensor is completed, otherwise, determining that the calibration of the initial value a of the oxygen sensor is not completed.
In some embodiments, the determining whether the cooking device has completed calibration of the initial value a of the oxygen sensor includes the following steps:
s21: matching according to the last stored oxygen sensor data to obtain an atmospheric pressure value;
s22: and judging whether the atmospheric pressure value reaches the local atmospheric pressure value of the area where the cooking equipment is located, if so, judging that the calibration of the initial value A of the oxygen sensor is finished, and if not, judging that the calibration of the initial value A of the oxygen sensor is not finished.
In some embodiments, the environmentally sweeping the cooking cavity specifically comprises:
s301: starting the heating module to heat the cooking cavity;
s302: judging whether the real-time temperature of the cooking cavity reaches a second set temperature, if so, starting to record second heating time and turning to the next step, otherwise, continuing to execute the step S302:
s303: and when the second heating time reaches the second set time, finishing environmental cleaning of the cooking cavity.
In some embodiments, the second set temperature is equal to the ambient temperature of the area where the cooking appliance is located, and the second set time is greater than or equal to the warm-up time of the oxygen sensor.
In some embodiments, the environmentally cleaning the cooking cavity specifically comprises:
s311: starting the heating module to heat the cooking cavity;
s312: when the real-time temperature of the cooking cavity reaches a first set temperature, starting to record first heating time;
s313: judging whether the first heating time reaches a first set time, if so, turning to the next step, otherwise, continuing to execute the step S313;
s314: adjusting down the working parameters of the heating module or closing the heating module;
s315: judging whether the real-time temperature of the cooking cavity reaches a second set temperature, if so, starting to record second heating time and turning to the next step, otherwise, returning to the step S314:
s316: and when the second heating time reaches the second set time, finishing environmental cleaning of the cooking cavity.
In some embodiments, the first set temperature is greater than the second set temperature, which is equal to the ambient temperature of the area where the cooking device is located; the sum of the first set time and the second set time is greater than or equal to the preheating time of the oxygen sensor.
In some embodiments, the acquiring and recording oxygen sensor data while recording the number of acquisitions comprises the steps of: acquiring and recording the data of the oxygen sensor at an interval of delta t time before the using time of the cooking equipment reaches the preset time or the acquisition times reach the preset times, and simultaneously recording the acquisition times.
In some embodiments, the comparing the using time of the cooking device with a preset time or the collecting number with a preset number, and determining whether to acquire and store the oxygen sensor initial value a based on the comparison result specifically includes:
s71: judging whether the use time of the cooking equipment reaches the preset time or not, or judging whether the acquisition times reach the preset times or not;
s72: if the using time of the cooking equipment reaches the preset time or the collection times reach the preset times, storing the last collected oxygen sensor data as an oxygen sensor initial value A, or storing the average value of all the oxygen sensor data collected in the later period as the oxygen sensor initial value A;
s73: and if the using time of the cooking device does not reach the preset time and the collection times does not reach the preset times, returning to the step S6.
In some embodiments, the implementing an oxygen sensor attenuation offset correction strategy includes the steps of:
s8: repeating steps S3 through S6;
s9: when the using time of the cooking equipment reaches preset time or the acquisition times reach preset times, acquiring and storing an oxygen sensor calibration value B;
s10: and calculating a correction value K of the oxygen sensor according to the factory setting value X of the oxygen sensor, the initial value A of the oxygen sensor and the calibration value B of the oxygen sensor.
Compared with the prior art, the invention at least comprises the following beneficial effects:
according to the invention, the cooking cavity is cleaned and the oxygen sensor is preheated, and the initial value A of the oxygen sensor is obtained and maintained after the use time of the cooking equipment is longer than the reference value, so that the influences of nonstandard oxygen content in the ambient atmosphere, residual water vapor in the cooking cavity and moisture of a ceramic body in the oxygen sensor on the calibration result of the oxygen sensor are eliminated, the calibration precision of the oxygen sensor is improved, the correction of the oxygen sensor deviation caused by the ambient atmospheric pressure of the area where the cooking equipment is located is realized, the precision of the initial value A of the oxygen sensor is effectively ensured, and the humidity detection accuracy of the cooking equipment is favorably improved.
Drawings
FIG. 1 is a flowchart of a method for calibrating an oxygen sensor according to embodiment 1 of the present invention;
fig. 2 is a connection block diagram of a cooking apparatus in embodiment 1 of the present invention;
FIG. 3 is a sub-flowchart of step S2 in embodiment 1 of the present invention;
fig. 4 is a sub-flowchart of step S3 in embodiment 1 of the present invention;
fig. 5 is a sub-flowchart of step S7 in embodiment 1 of the present invention;
fig. 6 is a sub-flowchart of step S3 in embodiment 2 of the present invention;
fig. 7 is a flowchart of an oxygen sensor calibration method in embodiment 3 of the present invention.
Detailed Description
The following examples illustrate the present invention, but the present invention is not limited to these examples. Modifications to the embodiments of the invention or equivalent substitutions of parts of technical features without departing from the spirit of the invention are intended to be covered by the scope of the claims of the invention.
Example 1
Referring to fig. 1-2, the present embodiment provides a method for calibrating an oxygen sensor of a cooking device, where the cooking device is any one of a steam box, a steaming and baking all-in-one machine, a baking and steaming all-in-one machine, a steam oven, a micro-steam box, and a micro-steaming and baking all-in-one machine. This embodiment uses cooking equipment as the steaming oven as an example, and it includes cooking cavity 1, heating module 2, oxygen sensor 3 and control module 4, and heating module 2 connects cooking cavity 1 and is used for heating cooking cavity 1, and oxygen sensor 3 sets up on cooking cavity 1 and is used for detecting cooking cavity 1, and control module 4 includes controller 41 and a plurality of timing unit 42, and wherein controller 41 electricity respectively connects heating module 2, oxygen sensor 3 and timing unit 42. In this embodiment, the electrical connection includes an electrical connection and a communication connection, and the communication connection includes a wireless communication connection and a wired communication connection. In addition, the cooking apparatus further includes an exhaust module 5, the exhaust module 5 communicates with the inside of the cooking cavity 1 and the atmosphere, respectively, and the exhaust module 5 is electrically connected to the controller 41.
Referring to fig. 1, the method for calibrating an oxygen sensor according to the embodiment includes the following steps:
s1: starting the cooking equipment and starting to record the use time of the cooking equipment;
specifically, the cooking appliance is powered on, and the controller 41 starts the cooking appliance and controls the first timing unit 42 to record the usage time of the cooking appliance when receiving a cooking appliance start instruction.
S2: judging whether the cooking equipment finishes the calibration of the initial value A of the oxygen sensor, if not, executing a calibration strategy of the oxygen sensor 3 and turning to the next step, and if so, executing an attenuation deviation correction strategy of the oxygen sensor 3;
s3: starting to preheat the oxygen sensor 3 and simultaneously carrying out environmental cleaning on the cooking cavity 1;
specifically, the controller 41 controls the oxygen sensor 3 to start preheating, and simultaneously starts environmental cleaning of the cooking cavity 1, so as to eliminate the influence of residual water vapor in the cooking cavity 1 on the detection accuracy of the oxygen sensor 3, and in addition, because the oxygen content in the atmospheric environment is not standard, by making the environment in the cooking cavity 1 close to the atmospheric environment of the area where the cooking equipment is located, the phenomenon that the calibration accuracy is low possibly caused by the fact that the oxygen content in the atmospheric environment is taken as the standard by a user can be avoided. In this embodiment, the preheating of the oxygen sensor 3 generally requires 3 minutes, and the oxygen sensor 3 is controlled to be heated for a period of time at a low power and then at a rated power, so as to perform dehumidification on the oxygen sensor 3, thereby ensuring the detection accuracy of the oxygen sensor 3.
S4: completing environmental cleaning and preheating of the oxygen sensor 3;
s5: judging whether the service time of the cooking equipment is greater than a reference value, if so, turning to the next step, and if not, continuing to execute the step S5;
specifically, the reference value is greater than the preheating time of the oxygen sensor 3 and is greater than the environmental cleaning time of the cooking cavity 1, so that the cooking equipment is effectively ensured to start to collect the data of the oxygen sensor 3 after completing environmental cleaning and preheating of the oxygen sensor 3, interference factors are reduced, and the accuracy of the detection result of the oxygen sensor 3 is ensured.
S6: collecting and recording data of the oxygen sensor 3, and simultaneously recording the collection times;
s7: and comparing the using time of the cooking equipment with the preset time or the collecting times with the preset times, and determining whether to acquire and save the initial value A of the oxygen sensor based on the comparison result.
It can be seen that, the oxygen sensor calibration method of the cooking device of this embodiment can accurately identify whether the cooking device executes the oxygen sensor 3 calibration strategy, and when the oxygen sensor 3 calibration strategy is executed, the cooking cavity 1 is cleaned and the oxygen sensor 3 is preheated first, and after the use time of the cooking device is greater than the reference value, the initial value a of the oxygen sensor is obtained and maintained, so that the influence of nonstandard oxygen content in the ambient atmosphere, residual water vapor in the cooking cavity 1 and moisture of a ceramic body inside the oxygen sensor 3 on the calibration result of the oxygen sensor 3 is eliminated, the calibration precision of the oxygen sensor 3 is improved, the correction of the deviation of the oxygen sensor 3 caused by the atmospheric pressure of the ambient atmosphere in the area where the cooking device is located is realized, the precision of the initial value a of the oxygen sensor is effectively ensured, and the improvement of the humidity detection accuracy of the cooking device is facilitated.
Preferably, in step S2, the determining whether the cooking device has completed the calibration of the initial value a of the oxygen sensor may be performed by determining whether the controller 41 of the control module 4 stores the initial value a of the oxygen sensor, if so, determining that the calibration of the initial value a of the oxygen sensor has been completed, otherwise, determining that the calibration of the initial value a of the oxygen sensor has not been completed, so as to implement whether the precise identifying device executes the calibration policy of the oxygen sensor 3, further implement identifying whether the user uses the cooking device for the first time, and ensure that the accuracy of the initial value a of the oxygen sensor used by the user for the cooking device is high.
Referring to fig. 3, in step S2, the determination of whether the cooking apparatus has completed calibration of the initial value a of the oxygen sensor may be further implemented by:
s21: matching according to the last stored data of the oxygen sensor 3 to obtain an atmospheric pressure value;
specifically, the controller 41 stores data on the relationship between oxygen concentration and atmospheric pressure. The controller 41 acquires the data of the oxygen sensor 3 stored in the cooking apparatus for the last time, and matches the data of the oxygen sensor 3 with the prestored relationship data of the oxygen concentration and the atmospheric pressure value to obtain an atmospheric pressure value, so that the oxygen concentration does not need to be acquired from the atmospheric environment to be used as standard calibration, and the calibration precision of the oxygen sensor 3 is prevented from being reduced due to nonstandard oxygen content in the atmosphere.
S22: and judging whether the atmospheric pressure value reaches the local atmospheric pressure value of the area where the cooking equipment is located, if so, judging that the calibration of the initial value A of the oxygen sensor is finished, and if not, judging that the calibration of the initial value A of the oxygen sensor is not finished.
Specifically, the local air pressure value may be a range value or a fixed value, and the cooking apparatus further includes an air pressure sensor (not shown in the figure) electrically connected to the controller 41, and the air pressure sensor is configured to monitor the local air pressure value of the atmosphere environment in the area where the cooking apparatus is located. The controller 41 obtains an accurate local air pressure value according to the air pressure sensor, compares the matched atmospheric pressure value with the local air pressure value obtained by monitoring the air pressure sensor, and judges that the calibration of the initial value A of the oxygen sensor is completed if the atmospheric pressure value reaches the local air pressure value; otherwise, the calibration of the initial value A of the oxygen sensor is judged to be not completed.
Referring to fig. 4, preferably, in step S3, the environmental cleaning of the cooking cavity 1 specifically includes: s301: starting the heating module 2 to heat the cooking cavity 1;
s302: judging whether the real-time temperature of the cooking cavity 1 reaches a second set temperature, if so, starting to record second heating time and turning to the next step, otherwise, continuing to execute the step S302:
specifically, the cooking apparatus further comprises a temperature sensor 6 electrically connected to the controller 41, the temperature sensor 6 is used for detecting the real-time temperature inside the cooking cavity 1, and the temperature sensor 6 can also detect the ambient temperature of the area where the cooking apparatus is located, or detect the ambient temperature through the ambient temperature sensor electrically connected to the controller 41. The second set temperature is equal to the ambient temperature of the area where the cooking device is located. If the controller 41 determines that the real-time temperature of the cooking cavity 1 reaches the second set temperature, it indicates that the temperature of the cooking cavity 1 is consistent with the ambient temperature, and controls the second timing unit 42 to start recording the second heating time and to go to the next step; if the controller 41 determines that the real-time temperature of the cooking cavity 1 does not reach the second set temperature, the cooking cavity 1 needs to be continuously heated until the real-time temperature in the cooking cavity 1 reaches the second set temperature.
S303: and when the second heating time reaches the second set time, finishing environmental cleaning of the cooking cavity 1.
Specifically, the second set time is greater than or equal to the preheating time of the oxygen sensor 3, so as to ensure that the oxygen sensor 3 can complete preheating when the cooking cavity 1 completes environmental cleaning. The heating module 2 continues to heat the cooking cavity 1, so that the real-time temperature of the cooking cavity 1 is maintained at a second set temperature, meanwhile, the controller 41 judges whether the second heating time reaches the second set time, if the second heating time reaches the second set time, it indicates that the cooking cavity 1 is finished to clean the environment, at the moment, the timing is finished and the timing of the second timing unit 42 is reset, the cooking cavity 1 is in a low-temperature and low-humidity state, the environment in the cooking cavity 1 and the external environment of the area where the cooking equipment is located are guaranteed, the calibration error is favorably reduced, and the collected and recorded oxygen sensor data are more accurate and reliable.
Preferably, in step S6, the acquiring and recording the oxygen sensor 3 data and the acquiring times, which includes the following steps: before the using time of the cooking equipment reaches the preset time or the collection times reach the preset times, the data of the oxygen sensor 3 are collected and recorded at intervals of delta t time, and meanwhile, the collection times are recorded. Thus, the time period for collecting the oxygen sensor data is: starting from the time when the using time of the cooking device reaches the reference value until the using time of the cooking device is equal to the preset time or the collection times reach the preset times. During this time period, data are collected and recorded once at intervals Δ t, and finally a data set consisting of n oxygen sensor data assemblies is obtained, all the oxygen sensor data being a1, a2, a3 … an respectively.
Referring to fig. 5, preferably, the comparing the using time of the cooking device with the preset time or the collecting times with the preset times, and determining whether to acquire and store the oxygen sensor initial value a based on the comparison result specifically include:
s71: judging whether the service time of the cooking equipment reaches a preset time or not, or judging whether the acquisition times reach preset times or not;
s72: if the using time of the cooking equipment reaches the preset time or the collection times reach the preset times, storing the last collected data of the oxygen sensor 3 as an oxygen sensor initial value A, or storing the average value of all the data of the oxygen sensor 3 collected in the later period as the oxygen sensor initial value A;
specifically, when the last acquired oxygen sensor 3 data is saved as the oxygen sensor initial value a, the oxygen sensor initial value a is an; when the average value of all the oxygen sensor 3 data acquired in the later period is stored as the oxygen sensor initial value a, all the oxygen sensor 3 data acquired in the later period in this embodiment means data acquired and recorded from the 2 nd, 3 rd or 4 th start to the last time. This embodiment is to start the acquisition from the 4 th time, and the total oxygen sensor 3 data acquired at the later stage includes a4 and a5 … an, at this time. It can be seen that since the oxygen sensor 3 has a short initial use time and no attenuation, the acquired data is accurate and reliable, and the influence of the data of the cooking device on the calibration result after being tried for many times in the sale stage can be avoided by taking the last acquired data of the oxygen sensor 3 or the average value of all the acquired data of the oxygen sensor 3 in the later period as the initial value A of the oxygen sensor, so that the local use of the cooking device in the user during calibration is effectively ensured, and the accuracy of the stored initial value A of the oxygen sensor is improved. The controller 41 may calculate the deviation of the oxygen sensor 3 according to the initial value a of the oxygen sensor and the factory setting value X of the oxygen sensor 3.
S73: and if the using time of the cooking device does not reach the preset time and the collection times do not reach the preset times, returning to the step S6.
Example 2
Referring to fig. 6, the present embodiment is different from embodiment 1 in that the control logic for performing the environmental cleaning on the cooking cavity 1 is different. In this embodiment, carry out the environmental cleaning to cooking cavity 1, specifically include:
s311: starting the heating module 2 to heat the cooking cavity 1;
s312: when the real-time temperature of the cooking cavity 1 reaches a first set temperature, starting to record first heating time;
specifically, the first set temperature is greater than the second set temperature, and the second set temperature is equal to the ambient temperature of the area where the cooking device is located; the sum of the first set time and the second set time is greater than or equal to the preheating time of the oxygen sensor 3. When the controller 41 judges that the real-time temperature of the cooking cavity 1 reaches the first set temperature, at this time, the air in the cooking cavity 1 is heated to facilitate moisture removal, the exhaust module 5 is controlled to work if necessary to remove the residual water vapor or condensed water in the cooking cavity 1, interference factors influencing the detection data precision of the oxygen sensor 3 are effectively eliminated, and meanwhile, the second timing unit 42 starts to record the first heating time and shifts to the next step; if the controller 41 determines that the real-time temperature of the cooking cavity 1 does not reach the first set temperature, the cooking cavity 1 needs to be continuously heated until the real-time temperature in the cooking cavity 1 reaches the first set temperature.
S313: judging whether the first heating time reaches a first set time, if so, turning to the next step, otherwise, continuing to execute the step S313;
specifically, the heating module 2 continues to heat the cooking cavity 1 to maintain the real-time temperature of the cooking cavity 1 at a first set temperature, and the controller 41 determines whether the first heating time reaches the first set time, if the first heating time reaches the first set time, it indicates that the residual water vapor or condensed water in the cooking cavity 1 is completely removed, and through the dehumidification stage of the cooking cavity 1, the interference factors are effectively eliminated, and at this time, the next step can be performed; if the first heating time does not reach the first set time, the cooking cavity 1 needs to be continuously heated until the first heating time reaches the first set time, so as to ensure the dehumidifying effect of the cooking cavity 1.
S314: the working parameters of the heating module 2 are reduced or the heating module 2 is closed;
s315: judging whether the real-time temperature of the cooking cavity 1 reaches a second set temperature, if so, starting to record second heating time and turning to the next step, otherwise, returning to the step S314:
s316: and when the second heating time reaches the second set time, finishing environmental cleaning of the cooking cavity 1.
It can be seen that this embodiment is through heating cooking cavity 1 to first settlement temperature earlier and maintaining first settlement time, in order to realize fully dehumidifying cooking cavity 1, guarantee that cooking cavity 1 is in low humid state, then with cooking cavity 1 cool down to second settlement temperature (be ambient temperature) and maintain second settlement time, so that cooking cavity 1 is in low temperature state, thus, ensure that cooking cavity 1 internal environment accords with atmospheric environment's ambient temperature and ambient humidity, make the oxygen concentration that oxygen sensor 3 detected laminate local environment's oxygen concentration more, make the calibration precision of the oxygen concentration deviation that the correction environment atmospheric pressure arouses higher.
Example 3
Referring to fig. 7, the present embodiment is different from embodiment 1 in that the oxygen sensor calibration method further includes a specific control logic for executing an attenuation deviation correction strategy for the oxygen sensor 3. In the present embodiment, the implementation of the attenuation deviation correction strategy for the oxygen sensor 3 includes the following steps:
s8: repeating steps S3 through S6;
s9: when the using time of the cooking equipment reaches the preset time or the collection times reach the preset times, acquiring and storing an oxygen sensor calibration value B;
specifically, the oxygen sensor 3 data acquired and recorded the last time is saved as the oxygen sensor calibration value B, or the average of all the oxygen sensor 3 data acquired and recorded from the fourth time onward is saved as the oxygen sensor calibration value B. The controller 41 can calculate the attenuation deviation ζ of the oxygen sensor 3 from the stored oxygen sensor calibration value B and the factory setting value X of the oxygen sensor 3.
S10: and calculating a correction value K of the oxygen sensor 3 according to the factory setting value X of the oxygen sensor 3, the oxygen sensor initial value A and the oxygen sensor calibration value B. The correction value of the oxygen sensor 3 of the present embodiment.
Therefore, the attenuation deviation of the oxygen sensor is accurately detected by executing the attenuation deviation correction strategy of the oxygen sensor 3 on the cooking equipment, so that the oxygen sensor 3 is automatically calibrated according to the attenuation deviation, and the long-term use precision of the oxygen sensor 3 is ensured.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (9)
1. An oxygen sensor calibration method of a cooking device, the cooking device comprising a cooking cavity (1), a heating module (2), an oxygen sensor (3) and a control module (4), characterized in that the oxygen sensor calibration method comprises the following steps:
s1: starting the cooking equipment and starting to record the use time of the cooking equipment;
s2: judging whether the cooking equipment finishes the calibration of the initial value A of the oxygen sensor, if not, executing a calibration strategy of the oxygen sensor (3) and turning to the next step, and if so, executing an attenuation deviation correction strategy of the oxygen sensor (3);
s3: starting to preheat the oxygen sensor (3), and simultaneously performing environmental cleaning on the cooking cavity (1);
s4: completing environmental cleaning and preheating of the oxygen sensor (3);
s5: judging whether the service time of the cooking equipment is greater than a reference value, if so, turning to the next step, and if not, continuing to execute the step S5;
s6: collecting and recording data of the oxygen sensor (3), and simultaneously recording the collection times;
s71: judging whether the use time of the cooking equipment reaches the preset time or not, or judging whether the acquisition times reach the preset times or not;
s72: if the using time of the cooking equipment reaches the preset time or the collection times reach the preset times, storing the last collected data of the oxygen sensor (3) as an initial value A of the oxygen sensor, or storing the average value of all the data of the oxygen sensor (3) collected in the later period as the initial value A of the oxygen sensor;
s73: and if the using time of the cooking device does not reach the preset time and the collection times do not reach the preset times, returning to the step S6.
2. The method for calibrating the oxygen sensor of the cooking device according to claim 1, wherein the determining whether the cooking device has completed calibration of the initial value A of the oxygen sensor is performed by determining whether the control module (4) stores the initial value A of the oxygen sensor, if so, determining that calibration of the initial value A of the oxygen sensor is completed, otherwise, determining that calibration of the initial value A of the oxygen sensor is not completed.
3. The method for calibrating the oxygen sensor of the cooking device according to claim 1, wherein the step of determining whether the cooking device has completed calibration of the initial value A of the oxygen sensor comprises the following steps:
s21: matching according to the last stored data of the oxygen sensor (3) to obtain an atmospheric pressure value;
s22: and judging whether the atmospheric pressure value reaches the local atmospheric pressure value of the area where the cooking equipment is located, if so, judging that the calibration of the initial value A of the oxygen sensor is finished, and if not, judging that the calibration of the initial value A of the oxygen sensor is not finished.
4. The method for calibrating an oxygen sensor of a cooking device according to claim 1, wherein the environmentally cleaning the cooking cavity (1) comprises:
s301: starting the heating module (2) to heat the cooking cavity (1);
s302: judging whether the real-time temperature of the cooking cavity (1) reaches a second set temperature, if so, starting to record second heating time and turning to the next step, otherwise, continuing to execute the step S302:
s303: and when the second heating time reaches the second set time, finishing environmental cleaning of the cooking cavity (1).
5. The method for calibrating the oxygen sensor of a cooking device according to claim 4, wherein the second set temperature is equal to the ambient temperature of the area where the cooking device is located, and the second set time is greater than or equal to the preheating time of the oxygen sensor (3).
6. The method for calibrating an oxygen sensor of a cooking device according to claim 1, wherein the environmentally cleaning the cooking cavity (1) comprises:
s311: starting the heating module (2) to heat the cooking cavity (1);
s312: when the real-time temperature of the cooking cavity (1) reaches a first set temperature, starting to record first heating time;
s313: judging whether the first heating time reaches a first set time, if so, turning to the next step, otherwise, continuing to execute the step S313;
s314: the working parameters of the heating module (2) are reduced or the heating module (2) is closed;
s315: judging whether the real-time temperature of the cooking cavity (1) reaches a second set temperature, if so, starting to record second heating time and turning to the next step, otherwise, returning to the step S314:
s316: and when the second heating time reaches the second set time, finishing environmental cleaning of the cooking cavity (1).
7. The method of claim 6, wherein the first set temperature is greater than the second set temperature, and the second set temperature is equal to an ambient temperature of an area where the cooking device is located; the sum of the first set time and the second set time is greater than or equal to the preheating time of the oxygen sensor (3).
8. The method for calibrating an oxygen sensor of a cooking appliance according to claim 1, wherein the step of collecting and recording the data of the oxygen sensor (3) and the number of times of collecting is carried out comprises the following steps: before the using time of the cooking equipment reaches the preset time or the collection times reach the preset times, the data of the oxygen sensor (3) are collected and recorded once at an interval delta t time, and the collection times are recorded once at the same time.
9. The method for calibrating an oxygen sensor of a cooking appliance according to any one of claims 1 to 8, wherein said implementation of an oxygen sensor (3) attenuation deviation correction strategy comprises the following steps:
s8: repeating steps S3 through S6;
s9: when the using time of the cooking equipment reaches the preset time or the collection times reach the preset times, acquiring and storing an oxygen sensor calibration value B;
s10: and calculating a correction value K of the oxygen sensor (3) according to the factory setting value X of the oxygen sensor (3), the initial value A of the oxygen sensor and the calibration value B of the oxygen sensor.
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