CN109654550B - Gas stove and control method for gas stove - Google Patents
Gas stove and control method for gas stove Download PDFInfo
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- CN109654550B CN109654550B CN201910105887.3A CN201910105887A CN109654550B CN 109654550 B CN109654550 B CN 109654550B CN 201910105887 A CN201910105887 A CN 201910105887A CN 109654550 B CN109654550 B CN 109654550B
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- 230000000630 rising effect Effects 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 8
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- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000010411 cooking Methods 0.000 abstract description 102
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- 206010063385 Intellectualisation Diseases 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 139
- 230000002159 abnormal effect Effects 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 238000009835 boiling Methods 0.000 description 4
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- 238000005070 sampling Methods 0.000 description 4
- 235000014347 soups Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 3
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- 239000002737 fuel gas Substances 0.000 description 2
- 235000021395 porridge Nutrition 0.000 description 2
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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
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Abstract
The invention discloses a gas stove and a control method for the gas stove, and belongs to the technical field of household appliances. The control method for the gas stove comprises the following steps: detecting the temperature of a cooker on the gas stove; determining a change in temperature of the cooker over a set time; and determining whether the initial temperature of the cooker is too high according to the change of the temperature of the cooker in the set time. According to the control method for the gas stove, whether the initial temperature of the cooker is too high is judged according to the temperature change of the cooker, misjudgment on the cooking process caused by the excessive initial temperature is avoided, and the intellectualization of automatic cooking and the accuracy of operation are improved.
Description
Technical Field
The invention relates to the technical field of stoves, in particular to a gas stove and a control method for the gas stove.
Background
The gas stove is an important cooking electric appliance in modern family kitchens, and the traditional gas stove controls the opening degree of a flow valve through mechanical structures such as a knob and the like so as to adjust the fire power. For the intelligent kitchen range, as the pan bottom temperature sensor is added to sense the pan bottom temperature in the cooking process, the alarm judgment and the cooking process are related to the pan bottom temperature sensed by the pan bottom temperature sensor at any time, but the pan bottom temperature is not necessarily always close to the room temperature at the beginning of each cooking process, and the condition of higher initial temperature may exist. When the initial temperature of the bottom of the pot is high, the cooking process and the alarm protection judging program are greatly disturbed, and error protection actions or wrong cooking process jumps are easily caused, so that wrong operation of the automatic cooking process is caused.
Disclosure of Invention
The embodiment of the invention provides a gas stove and a control method for the gas stove, which are used for judging whether the initial temperature of a cooker is too high according to the temperature change of the cooker, avoiding misjudgment of the cooking process caused by the excessive initial temperature and improving the intellectualization and accuracy of automatic cooking. The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of an embodiment of the present invention, there is provided a control method for a gas range, including: detecting the temperature of a cooker on the gas stove; determining a change in temperature of the cooker over a set time; and determining whether the initial temperature of the cooker is too high according to the change of the temperature of the cooker in the set time.
Optionally, wherein said determining whether the cookware is initially too hot based on the change in temperature of the cookware comprises: when the temperature of the cooker changes from falling to rising within a set time, determining that the initial temperature of the cooker is too high.
Optionally, the determining the change in the temperature of the cooker within the set time includes: calculating an average value for two or more continuously detected temperatures of the cookers; a gradient of change in the average temperature of two or more cookers over the set time is determined.
Optionally, before detecting the temperature of a cooker on the gas range; further comprises: detecting whether the cooker is placed on the gas stove; and detecting a flame temperature of the gas range to determine whether the gas range is in an ignition state; when the cooker is arranged on the gas stove and the gas stove is in a firing state, timing is controlled according to the set time.
Optionally, the method further comprises: setting a direction variable to indicate the gradient of change; wherein when the gradient of change is rising, the direction variable is positive; when the gradient of change is decreasing, the direction variable is negative; when the gradient of variation is unchanged, the direction variable is zero.
Optionally, the method further comprises: when the cooker is determined to be over-high in initial temperature, the control protection device is locked in a non-action state.
According to a second aspect of an embodiment of the present invention, there is provided a gas range including: ignition, combustor and gas pipeline, the gas pipeline with the combustor is connected, still includes: a first detecting device for detecting the temperature of a cooker on the gas stove; and control means for determining a change in temperature of the cooker over a set time; and determining whether the initial temperature of the cooker is too high according to the change of the temperature of the cooker in the set time.
Optionally, wherein the determining, by the control device, whether the initial temperature of the cooker is too high according to the change in the temperature of the cooker includes: when the temperature of the cooker changes from falling to rising within a set time, determining that the initial temperature of the cooker is too high.
Optionally, wherein the determining, by the control device, a change in temperature of the cooker over a set time includes: calculating an average value of the temperatures of two or more cookers continuously detected by the first detection device; and determining a gradient of change in the average temperature of two or more cookers over the set time.
Optionally, the method further comprises: a second detecting means for detecting whether the cooker is placed on the gas range; and third detecting means for detecting a flame temperature of the gas range to determine whether the gas range is in an ignition state; when the cooker is arranged on the gas stove and the gas stove is in a firing state, the control device controls timing according to the set time.
Optionally, the method further comprises: a flow regulating system coupled to the gas line for regulating the flow of gas through the gas line, comprising: the flow valve is arranged on the gas pipeline; the driving mechanism is coupled with the flow valve, and the opening of the flow valve is adjusted when the driving mechanism operates; the protection device is used for controlling the opening or closing of the gas pipeline or controlling the flameout of the ignition device; wherein the control device is further configured to: and when the initial temperature of the cooker is determined to be too high, controlling the protection device to be in a locking and non-action state.
Optionally, the control device is further configured to: when the state of the cooker is determined to be changed from the initial temperature to be too high, the protection device is controlled to be unlocked to enter a normal working state.
According to the control method for the gas stove, whether the initial temperature is too high is judged according to the change condition of the temperature of the cooker, so that correct reference data and input information are provided for an automatic cooking process, and the accuracy and the intellectualization of automatic cooking are improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic structural view of a gas range according to an exemplary embodiment;
fig. 2 is a schematic structural view of a gas cooker according to another exemplary embodiment;
fig. 2A is a schematic diagram showing a data structure of a gas cooker according to an exemplary embodiment;
fig. 3A is a flowchart illustrating a control method for a gas range according to an exemplary embodiment;
fig. 3B is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 4A is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 4B is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 4C is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 4D is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 4E is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 5 is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 6 is a flowchart illustrating a control method for a gas range according to another exemplary embodiment;
fig. 7 is a flowchart illustrating a control method for a gas range according to another exemplary embodiment.
Reference numerals:
1. an ignition device; 2. a burner; 3. a gas line; 4. a flow valve; 5. a driving mechanism; 6. a control device; 7. an electromagnetic valve; 8. a pan bottom temperature sensor; 9. a spring mechanism; 10. a micro-switch; 11. a receiving device; 12. a communication module; 13. and an alarm device.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. Various embodiments are described herein in a progressive manner, each embodiment focusing on differences from other embodiments, and identical and similar parts between the various embodiments are sufficient to be seen with each other. The method, product and the like disclosed in the examples are relatively simple to describe because they correspond to the method parts disclosed in the examples, and the relevant points are only referred to the description of the method parts.
Fig. 1 is a schematic view illustrating a structure of a gas cooker according to the present invention, according to an exemplary embodiment. As shown in fig. 1, a gas range according to an embodiment of the present invention includes: ignition 1, combustor 2 and gas pipeline 3, gas pipeline 3 with combustor 2 connects, still includes: a flow regulating system coupled to the gas line 3 for regulating the flow of gas through the gas line 3, comprising: the flow valve 4 is arranged on the gas pipeline 3; the driving mechanism 4 is coupled with the flow valve 4 and used for adjusting the opening degree of the flow valve 4; and a control device 6 for controlling the operation of the driving mechanism 5.
In the scheme, the flow regulating system is arranged in a coupling way with the gas pipeline of the gas stove, the flow of the gas flowing through the gas pipeline is regulated, and then the firepower of the burner is regulated, so that the firepower is automatically regulated, and the possibility is provided for the realization of automatic cooking.
In the above-mentioned scheme, the flow regulating system includes: the flow valve is arranged on the gas pipeline; the driving mechanism is coupled with the flow valve and used for adjusting the opening of the flow valve; and the control device is used for controlling the operation of the driving mechanism. As an example, the flow valve is a plug valve and the drive mechanism is a stepper motor.
In the above scheme, the method further comprises: the electromagnetic valve 7 is arranged on the gas pipeline in series with the flow valve, and is connected with a gas source and a burner, the control device 6 is electrically connected with the electromagnetic valve 7, the connection and disconnection of the gas pipeline and the gas source are controlled by controlling the disconnection and the closing of the electromagnetic valve 7, when necessary, for example, when the temperature of a detected cooker and the temperature of flame are both reduced to be within a set range within a set time, the abnormal combustion of the gas stove is judged, the abnormal ignition of the burner can not be caused, and at the moment, in order to avoid gas leakage, the connection of the gas pipeline and the gas source is cut off through the electromagnetic valve, so that the occurrence of safety accidents is avoided, and the reliability of the gas stove is improved.
Further comprises: receiving means 11 for receiving a user instruction; the control device is also used for controlling the driving mechanism to operate according to the user instruction.
As an example, the user instruction corresponds to a preset instruction set; and the control device controls the driving mechanism to operate according to the preset instruction set corresponding to the user instruction.
In the above scheme, the user instruction corresponds to a preset instruction set, and the preset instruction set may include, for example, cooking parameters such as cooking time, cooking temperature, end conditions, etc., where the cooking parameters may be a plurality of sets of parameter sets corresponding to cooking time and cooking temperature/fire, and the control device adjusts the flow of gas flowing into the burner in each cooking time period according to the above cooking parameters, so as to control the cooking fire, and combines with the timer to perform automatic cooking according to the preset time period and flame temperature.
The operating mode options of the cooking parameters corresponding to the control panel can be, for example: porridge cooking, quick-frying, water boiling, soup cooking, flour cooking, frying and the like. Corresponding to each cooking mode, setting one or more than one group of parameters of corresponding cooking time and cooking temperature according to each cooking stage, when the receiving device receives a user instruction to instruct one of the cooking modes, the control device calls a pre-stored parameter array of the cooking mode, and adjusts the parameter array to the corresponding cooking temperature in a set time period.
As an example, when in the soup cooking mode, the first 10 minutes is set, the boiling is continued with a larger fire, the cooking temperature/the temperature of the flame/the temperature of the cooker is set to 200-220 ℃, the slow fire cooking is performed in the middle 20 minutes, the cooking temperature/the temperature of the flame/the temperature of the cooker is set to 120-160 ℃, and the slow fire cooking is performed in the last 20 minutes, the cooking temperature/the temperature of the flame/the temperature of the cooker is set to 80-90 ℃. Other cooking modes refer to the setting flow, correspondingly increase or decrease, for example, an automatic flameout program is set in a timing mode, and a control flow for flameout prevention in a stir-frying pan and vibration state is increased in a stir-frying mode; in the water heating mode, the cooker is automatically flameout in a state that the temperature of the cooker reaches 110 ℃ for more than or equal to 5 s.
In the above-described scheme, the receiving device 11 is integrated in the control panel, is provided on the table surface of the gas cooker, and is connected with the control device in a wired or wireless manner, as an example.
As another example, further comprising: the communication module 12 is electrically connected with the receiving device and is used for receiving a user instruction and sending the user instruction to the control device, the control device controls the operation of the gas stove according to the user instruction, remote and offline control of the gas stove is achieved, for example, the instruction can be sent to the communication module through an APP of the mobile terminal, after the receiving device is electrically connected with the communication module, the user instruction is received, the control device controls the opening and closing of the gas stove according to the user instruction, when the user leaves home and forgets to close the gas stove, the mobile terminal sends the instruction to the gas stove, gas introduced into the gas stove is cut off, the gas stove is closed, and the safety of the gas stove is improved.
As another example, further comprising: detecting means for detecting a temperature of a flame on the burner or a temperature of a cooker, or for detecting a temperature of the flame and a temperature of the cooker; the control device is used for controlling the operation of the driving mechanism according to the detected temperature of the flame or the temperature of the cooker.
The detecting device detects the temperature of the flame on the burner and/or the temperature of the cooker, and the control device adjusts the firepower according to the temperature of the flame and/or the temperature of the cooker, namely, drives the stepping motor to rotate to enable the flow valve to work at different opening degrees.
The detection device comprises: the first detection device is a pan bottom temperature sensor 8 which is arranged in the center of the burner and is abutted against the bottom of the cooker; the second detection device, namely a trigger mechanism, is arranged in the center of the burner and is used for detecting the placement state of the cooker; the third detection device is a flame temperature sensor arranged beside the kitchen range and used for detecting the temperature of flame; wherein the pan bottom temperature sensor 8 is arranged at the center of the burner 2 through a spring mechanism 9, so that the pan bottom temperature sensor is attached to the bottoms of cookers with different structures.
In the scheme, the pan bottom temperature sensor 8 adopts a negative temperature coefficient NTC thermistor to carry out linearization treatment at the common cooking temperature of 40-280 ℃; the flame temperature sensor adopts a K-type thermocouple which can withstand the combustion temperature of the fuel gas.
According to the control method for the gas stove, the thermocouple flame temperature sensor arranged at the stove head and the thermal resistance pan bottom temperature sensor arranged in the middle of the stove head and capable of being in direct contact with the pan bottom are used for sensing cooking temperature simultaneously, and the electromagnetic valve switch is used for outputting protection actions, so that the protection is accurate and quick, the protection accuracy is high, and the false protection probability is low.
As another example, the triggering mechanism, i.e. the second detecting means, is arranged in the center of the burner, detects the placement state of the cooker, and is arranged corresponding to the spring mechanism for mounting the pan bottom temperature sensor, and when the cooker is placed on the burner, the spring mechanism deforms to trigger the connected triggering mechanism for detecting whether the cooker is placed on the burner. The trigger mechanism is a micro switch.
When the cooker is placed on the burner, the micro switch is triggered to be closed by the spring mechanism, and when the cooker leaves the burner, the micro switch is opened.
As an example, wherein the control means is further adapted to determine a change in temperature of the cooker over a set time; and determining whether the initial temperature of the cooker is too high according to the change of the temperature of the cooker in the set time.
In the above scheme, wherein the control device determines whether the cooker is over-high or not according to the change of the temperature of the cooker comprises: when the temperature of the cooker changes from falling to rising within a set time, determining that the initial temperature of the cooker is too high.
In the above aspect, wherein the control means determines the change in the temperature of the cooker within a set time includes: calculating an average value of the temperatures of two or more cookers continuously detected by the first detection device; and determining a gradient of change in the average temperature of two or more cookers over the set time.
In the above scheme, the third detecting device is configured to detect a flame temperature of the gas stove, so as to determine whether the gas stove is in an ignition state; wherein when the cooker is placed on the gas stove and the gas stove is in a firing state, the control device controls a timing device such as a timer to count according to the set time.
As another example, further comprising: the protection device is used for controlling the opening or closing of the gas pipeline or controlling the flameout of the ignition device; wherein the control device is further configured to: and when the initial temperature of the cooker is determined to be too high, controlling the protection device to be in a locking and non-action state.
In the above scheme, the control device is further used for: when the state of the cooker is determined to be changed from the initial temperature to be too high, the protection device is controlled to be unlocked to enter a normal working state.
When the gas stove is connected with the mains supply and works normally, a control device, such as a main control MCU, acquires temperature values from a pan bottom temperature sensor in real time at the frequency of 2Hz, carries out sliding average according to 10 sampling point windows, and stores the temperature sliding average for 1 minute for 120 in total; the control device, for example, a main control MCU collects temperature values from a flame temperature sensor in real time at a frequency of 2Hz, performs sliding tie according to 10 sampling point windows, and stores a total of 120 temperature sliding average values for 1 minute; the main control MCU also collects the jump state of the pan bottom trigger mechanism/the micro switch in an I/O port interrupt mode, and continuously collects the current closing state value of the micro switch; the main control MCU initializes a timing device/special timer for preparing for overtime judgment; initializing two integer variables, and respectively recording the current real-time value of the bottom temperature and the real-time value of the flame temperature; initializing a direction variable/integer variable, and recording the current temperature gradient value direction; and initializing an integer variable, and recording a real-time result mark for judging the initial temperature over-high. These variables together constitute a cooktop temperature erroneous judgment prevention data structure, as shown in FIG. 2A.
When the main control MCU monitors the interruption of the I/O port caused by the opening to the closing of the micro switch, the state of the micro switch is judged again, and if the micro switch is in the closed state level for a plurality of times, the kitchen range is considered to be put into the kitchen range and the special timer is started. And judging whether the flame is in the firing state according to the current flame temperature value. Judging the change trend of the temperature of the pan bottom through the pan bottom temperature sliding average array, and updating the change direction variable of the temperature gradient of the pan bottom. When the real-time value of the temperature of the pan bottom is obviously higher than the conventional set temperature, firstly waiting for the change direction of the temperature gradient to be changed from positive to 0 or from negative; and then the temperature gradient change direction is waited to be changed from negative direction to 0 again or to positive direction, namely the temperature of the pan bottom is in a trend of rising after falling. And during the waiting period, the judgment result mark is always set at the suspected initial temperature to be too high, and the protection logic does not act. When the waiting condition is met, the judgment result mark is placed on the condition that the initial temperature is over high, and the protection logic does not act.
If the temperature gradient is not subjected to the positive-to-0 or negative-to-negative phase, but is directly positive and becomes an increasing trend, or the timer reaches a set value and the waiting condition is still not met, the judgment result mark is immediately set as abnormal temperature of the pot bottom, and the protection device/program acts according to normal protection logic. And in the stage of the cooking process, when the judging result mark is suspected that the initial temperature is too high, the cooking process temporarily locks the current stage until the judging result mark is confirmed that the initial temperature is too high or the timer reaches a set value, unlocking the current stage, and continuously judging whether to enter the next process according to the cooking process or ending the cooking due to the protection logic action.
By adopting a moving average mode and temperature gradient trend judgment, the misjudgment phenomenon caused by the jitter or abrupt change of the sensor value is avoided, and the ascending and descending process of judging the temperature gradient can directly determine whether the kitchen range with overhigh initial temperature is suitable for the occurrence conditions of protection logic and cooking jump logic or not, and the use of a timer ensures a overtime exit mechanism when all kitchen range temperature misjudgment prevention logic fails. The phenomenon of misjudgment of a protection device/protection logic or a cooking flow existing when the kitchen range with the over-high initial temperature is used is reduced, and the intellectualization of automatic cooking is improved.
As a further example, further comprising: the alarm device 13 is electrically connected with the control device, and alarms when the temperature of the cooker or the temperature of the flame is too high to reach a certain set value.
Fig. 2 is a schematic structural view of a gas cooker according to another exemplary embodiment.
Fig. 3A is a flowchart illustrating a control method for a gas range according to an exemplary embodiment. The control method for a gas cooker according to an embodiment of the present invention as shown in fig. 3A includes: in step S110, a user instruction is received; in step S122, the flow rate of the gas flowing into the gas range is adjusted according to the user instruction.
In the scheme, the flow of the gas introduced into the gas stove is regulated according to the user instruction, so that the regulation of cooking firepower/temperature is realized, and the possibility is provided for the realization of automatic cooking.
As an example, the user instruction corresponds to a preset instruction set; and the control device controls the driving mechanism to operate according to the preset instruction set corresponding to the user instruction.
In the above scheme, the user instruction corresponds to a preset instruction set, and the preset instruction set may include, for example, cooking parameters such as cooking time, cooking temperature, end conditions, etc., where the cooking parameters may be a plurality of sets of parameter sets corresponding to cooking time and cooking temperature/fire, and the control device adjusts the flow of gas flowing into the burner in each cooking time period according to the above cooking parameters, so as to control the cooking fire, and combines with the timer to perform automatic cooking according to the preset time period and flame temperature.
The operating mode options of the cooking parameters corresponding to the control panel can be, for example: porridge cooking, quick-frying, water boiling, soup cooking, flour cooking, frying and the like. Corresponding to each cooking mode, setting one or more than one group of parameters of corresponding cooking time and cooking temperature according to each cooking stage, when the receiving device receives a user instruction to instruct one of the cooking modes, the control device calls a pre-stored parameter array of the cooking mode, and adjusts the parameter array to the corresponding cooking temperature in a set time period.
As an example, when in the soup cooking mode, the first 10 minutes is set, the boiling is continued with a larger fire, the cooking temperature/the temperature of the flame/the temperature of the cooker is set to 200-220 ℃, the slow fire cooking is performed in the middle 20 minutes, the cooking temperature/the temperature of the flame/the temperature of the cooker is set to 120-160 ℃, and the slow fire cooking is performed in the last 20 minutes, the cooking temperature/the temperature of the flame/the temperature of the cooker is set to 80-90 ℃. Other cooking modes refer to the setting flow, correspondingly increase or decrease, for example, an automatic flameout program is set in a timing mode, and a control flow for flameout prevention in a stir-frying pan and vibration state is increased in a stir-frying mode; in the water heating mode, the cooker is automatically flameout in a state that the temperature of the cooker reaches 110 ℃ for more than or equal to 5 s.
Fig. 3B is a flowchart illustrating a control method for a gas range according to an exemplary embodiment. The control method for a gas cooker according to an embodiment of the present invention as shown in fig. 3B further includes: in step S112, detecting a temperature of a cooker on the gas range; in step S120, the flow rate of the gas flowing into the gas range is adjusted according to the user command and the temperature of the cooker.
As an example, adjusting the flow rate of the gas flowing into the gas range according to the temperature of the cooker includes: when the temperature of the cooker is larger than a first set temperature value and the cooker is not placed on the burner, gradually reducing the flow of the gas flowing into the gas stove according to a set time interval.
In the above scheme, the method further comprises: when the cooker is detected to be replaced on the burner, the flow rate of the gas introduced into the gas range is regulated to be restored to be before the reduction.
In the above scheme, adjusting the flow of the gas introduced into the gas stove according to the temperature of the cooker further includes: and when the temperature of the cooker is larger than the first set temperature value and the time for placing the cooker on the burner is larger than the first set time, cutting off the gas flowing into the gas stove.
The gas stove is an important cooking appliance in a modern household kitchen, has a certain danger due to the fact that gas combustion is used as a heating mode, and can often cause problems such as ignition failure, abnormal flameout, dry burning of a pot body, overhigh temperature and the like due to factors of the stove or a user, so that serious potential safety hazards are caused. Eliminating or reducing these potential safety hazards is a tangible requirement for each consumer and is also a research and development direction for various large household appliance manufacturers. The control method for the gas stove mainly solves the problem of ignition protection in the whole cooking process of the one-key cooking stove, and has the advantages of being accurate and rapid in protection, high in protection accuracy and low in error protection probability.
Referring to fig. 4A, at any stage, if the temperature value of the pan bottom temperature sensor collected by the control device/the central controller is greater than the first set value 298 ℃ for more than 3 seconds, and the trigger mechanism/the micro switch at the lower part of the pan bottom temperature sensor is in a closed state, that is, the cooker is placed on the burner, the driving mechanism/the stepping motor is controlled to drive the plug valve to return to a zero position, the opening of the flow valve is driven to be minimum or closed, or the electromagnetic valve is controlled to cut off the air supply loop, so that the gas flowing into the gas stove is cut off, the gas stove is closed, or the panel LED is driven to display a dry burning error code at the same time, and the buzzer continuously prompts for 20 seconds at a frequency of 1 Hz. If the micro switch is in the off state at this time, the cooker leaves the cooking bench, the flow of the gas introduced into the gas cooker is gradually reduced according to a set time interval, for example, 10 seconds, namely, no prompt is carried out within 10 seconds, the internal timer is suspended, the stepping motor is controlled to drive the plug valve to reduce 2-gear firepower after 10 seconds, meanwhile, the panel LED is driven to display early warning of leaving the cooking bench, and the buzzer continuously prompts at 3HZ frequency; after 10 seconds, namely 20 seconds, the stepping motor is controlled to drive the plug valve to reduce to the lowest-grade fire power, meanwhile, the panel LED is driven to display a warning of separating from the cooking bench, and the buzzer continuously prompts at the frequency of 0.5 HZ; after 30 seconds, the electromagnetic valve is controlled to cut off the air supply loop, the stepping motor is controlled to drive the plug valve to return to the zero position, the panel LED is driven to display that the pot body/cooker is separated from the cooking bench for a long time, and the buzzer stops ringing. If the micro switch is closed again in the early warning and warning generation stage of the cooking bench, the early warning and warning state is eliminated, the stepping motor is controlled to drive the plug valve to restore the current firepower, the panel LED is driven to restore the cooking process display, the sound of the buzzer is eliminated, and the operation of the internal timer is restored.
According to the control method for the gas stove, the LED and the buzzer of the panel are used for pushing the fault alarm information to the user at the same time, different display contents and different buzzer sounding modes show different alarm meanings, and the control method has the advantages of being multiple in sensing mode and visual.
In the above scheme, the method further comprises: detecting the flame temperature of the gas stove; and in the ignition stage, when the flame temperature is smaller than a second temperature set value in a second set time, cutting off the gas introduced into the gas stove.
Referring to fig. 4B, in the ignition stage, after the ignition signal is sent out, the central controller of the control device continuously detects the temperature value of the flame temperature sensor, and stops sending out the ignition signal when the temperature value is detected to be obviously increased within 10 seconds, and if the temperature value is not detected to be obviously increased within 10 seconds, the electromagnetic valve is controlled to cut off the air supply loop while stopping sending out the ignition signal.
In the above scheme, the method further comprises: judging whether the temperature of the pan bottom/cooker detected by the pan bottom temperature sensor is within a set temperature range, and cutting off the gas introduced into the gas stove when the temperature of the cooker is not within the set temperature range or the pan bottom temperature sensor is short-circuited.
Referring to fig. 4C, after normal ignition, if the control device determines that the temperature sensor is disconnected or the temperature value is obviously abnormal in 2 minutes continuously, the electromagnetic valve is controlled to cut off the air supply loop, the stepping motor is controlled to drive the plug valve to return to the zero position, the panel LED is driven to display the abnormal prompt of the temperature probe, and the buzzer continuously prompts for 20 seconds at the frequency of 2 Hz.
As an example, further comprising: and after the ignition is finished, when the flame temperature is reduced to exceed a third temperature set value and the temperature of the cooker is reduced to exceed a fourth temperature set value in a third set time, cutting off the fuel gas fed into the gas stove.
Referring to fig. 4D, in any stage of normal cooking, if the flame temperature sensor continuously detects that the temperature of the flame suddenly decreases by more than 100 degrees celsius in a continuous decreasing trend, and the pan bottom temperature sensor continuously detects that the temperature of the pan bottom/the cooker slowly decreases, the electromagnetic valve is immediately controlled to cut off the air supply loop, the stepping motor is controlled to drive the plug valve to return to a zero position, the panel LED is driven to display an accidental flameout prompt, and the buzzer continuously prompts for 10 seconds at a frequency of 1 Hz.
As an example, further comprising: and receiving an ignition instruction, and judging whether the temperature of the cooker detected by the pan bottom temperature sensor is greater than a fifth temperature set value, if so, not executing the ignition instruction.
Referring to fig. 4E, in the protection state, if the temperature value of the cooker detected by the pan bottom temperature sensor is greater than 280 degrees celsius, the ignition function is not effective.
When the normal cooking starts, the cooking time length of the current stage is recorded through a timer, when the cooking time length of the final stage is reached after other protection does not occur, the electromagnetic valve is controlled to cut off the air supply loop, the stepping motor is controlled to drive the plug valve to return to a zero position, the panel LED is driven to display the normal end information of the cooking, the buzzer continuously prompts for 20 seconds at the frequency of 0.5Hz, and the complete ignition protection function of the preset cooking process is completed.
Fig. 5 is a flowchart illustrating a control method for a gas range according to another exemplary embodiment. The control method for a gas range according to an embodiment of the present invention as shown in fig. 5 includes: in step S110, detecting a temperature of a cooker on the gas range; in step S210, a change in temperature of the cooker over a set time is determined; in step S220, it is determined whether the cooker is initially excessively high according to a change in temperature of the cooker within the set time.
In the above scheme, the determining whether the cooker is over-high or not according to the change of the temperature of the cooker comprises: in step S222, when the temperature of the cooker changes from falling to rising within a set time, it is determined that the initial temperature of the cooker is excessively high.
As an example, wherein the determining the change in the temperature of the cooker over the set time includes: calculating an average value for two or more continuously detected temperatures of the cookers; a gradient of change in the average temperature of two or more cookers over the set time is determined.
Fig. 6 and 7 are flowcharts illustrating a control method for a gas cooker according to another exemplary embodiment. A control method for a gas range according to an embodiment of the present invention as shown in fig. 6 and 7, is performed before detecting the temperature of a cooker on the gas range; further comprises: detecting whether the cooker is placed on the gas stove; and detecting a flame temperature of the gas range to determine whether the gas range is in an ignition state; when the cooker is arranged on the gas stove and the gas stove is in a firing state, timing is controlled according to the set time.
As an example, further comprising: setting a direction variable to indicate the gradient of change; wherein when the gradient of change is rising, the direction variable is positive; when the gradient of change is decreasing, the direction variable is negative; when the gradient of variation is unchanged, the direction variable is zero.
In the above scheme, the method further comprises: when it is determined that the cooker is over-high in initial temperature, the protection device is controlled to be locked in a non-activated state in step S310.
When the gas stove is connected with the mains supply and works normally, the control device/main control MCU collects temperature values from the pan bottom temperature sensor in real time at the frequency of 2Hz, carries out sliding average according to 10 sampling point windows, and stores 120 temperature sliding average values for 1 minute; the main control MCU collects temperature values from the flame temperature sensor in real time at the frequency of 2Hz, performs sliding tie according to 10 sampling point windows, and stores a total of 120 temperature sliding average values for 1 minute; the main control MCU also collects the jump state of the micro switch of the pan bottom temperature sensor in an I/O port interrupt mode, and continuously collects the current closing state value of the micro switch; the main control MCU initializes a special timer for preparing for overtime judgment; initializing two integer variables, and respectively recording the current real-time value of the bottom temperature and the real-time value of the flame temperature; initializing an integer variable and recording the current temperature gradient value direction; initializing an integer variable and recording a real-time result mark for judging the initial temperature over-high. These variables together constitute a cooktop temperature erroneous judgment prevention data structure.
When the main control MCU monitors the interruption of the I/O port caused by the opening to the closing of the micro switch, the state of the micro switch is judged again, and if the micro switch is in the closed state level for a plurality of times, the kitchen range is considered to be put into the kitchen range and the special timer is started. And judging whether the flame is in the firing state according to the current flame temperature value. Judging the change trend of the temperature of the pan bottom through the pan bottom temperature sliding average array, and updating the change direction variable of the temperature gradient of the pan bottom. When the real-time value of the temperature of the pan bottom is obviously higher than the conventional set temperature, firstly waiting for the change direction of the temperature gradient to be changed from positive to 0 or from negative; then wait for the direction of the temperature gradient change to be changed from negative to 0 again or from positive. During waiting, the judgment result mark is always set at the suspected initial temperature to be too high, and the protection device/logic does not act. When the waiting condition is met, the judgment result mark is placed on the condition that the initial temperature is over high, and the protection device/logic does not act.
If the temperature gradient is not subjected to the positive-to-0 or negative-to-negative phase, but is directly positive and becomes an increasing trend, or the timer reaches a set value and the waiting condition is still not met, the judgment result mark is immediately set as abnormal temperature of the pot bottom, and the protection program acts according to normal protection logic. And in the stage of the cooking process, when the judging result mark is suspected that the initial temperature is too high, the cooking process temporarily locks the current stage until the judging result mark is confirmed that the initial temperature is too high or the timer reaches a set value, unlocking the current stage, and continuously judging whether to enter the next process according to the cooking process or ending the cooking due to the protection logic action.
By adopting a moving average mode and temperature gradient trend judgment, the misjudgment phenomenon caused by the jitter or abrupt change of the sensor value is avoided, and the ascending and descending process of judging the temperature gradient can directly determine whether the kitchen range with overhigh initial temperature is suitable for the occurrence conditions of protection logic and cooking jump logic or not, and the use of a timer ensures a overtime exit mechanism when all kitchen range temperature misjudgment prevention logic fails. The phenomenon of misjudgment of protection logic or cooking flow existing in the use of the kitchen range with over-high initial temperature is generally reduced.
According to the control method for the gas stove, whether the initial temperature is too high is determined according to the change of the temperature of the pan bottom, misjudgment of related protection devices/protection logics caused by the excessive initial temperature is avoided, and the intelligent level and the automation level of the gas stove are improved.
The related exemplary description of the control method for the gas cooker of the above-mentioned scheme refers to the related exemplary description in the gas cooker of fig. 1-2A, and is not described in detail herein.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Those skilled in the art may implement the described functionality using different approaches for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, and are not repeated herein. In the embodiments disclosed herein, it should be understood that the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, e.g., the division of the units is merely a logical function division, and there may be additional divisions when actually implemented, e.g., multiple units or components may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the correspondence or direct correspondence or communication connection shown or discussed with each other may be an indirect correspondence or communication connection via some interfaces, devices or units, may be in electrical, mechanical, or other forms. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment. In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
Claims (7)
1. A control method for a gas range, comprising:
detecting the temperature of a cooker bottom on the gas stove;
determining the change of the temperature of the cooker bottom in a set time;
determining whether the initial temperature of the cooker bottom is too high according to the change of the temperature of the cooker bottom in the set time;
wherein the determining whether the initial temperature of the cooker bottom is too high according to the change of the temperature of the cooker bottom comprises:
when the temperature of the cooker bottom changes from falling to rising within a set time, determining that the initial temperature of the cooker bottom is too high;
when the cooker bottom is determined to be over high in initial temperature, the control protection device is locked in a non-action state.
2. The method of claim 1, wherein the determining a change in temperature of the cookware pan over a set time comprises:
calculating average value of continuously detected temperatures of two or more cooker bottoms;
a gradient of change in the average temperature of the two or more cookware pans over the set time is determined.
3. The method according to claim 1 or 2, characterized in that before detecting the temperature of the cooker bottom on the gas cooker; further comprises:
detecting whether the cooker is placed on the gas stove; the method comprises the steps of,
detecting the flame temperature of the gas stove to determine whether the gas stove is in an ignition state;
when the cooker is arranged on the gas stove and the gas stove is in a firing state, the gas stove is controlled to time according to the set time.
4. A method according to claim 3, further comprising: setting a direction variable to indicate the gradient of change; wherein when the gradient of change is rising, the direction variable is positive; when the gradient of change is decreasing, the direction variable is negative; when the gradient of variation is unchanged, the direction variable is zero.
5. A gas range, comprising: ignition, combustor and gas pipeline, the gas pipeline with the combustor is connected, its characterized in that still includes:
the first detection device is used for detecting the temperature of the cooker bottom on the gas stove; the method comprises the steps of,
the control device is used for determining the change of the temperature of the cooker bottom in the set time and determining whether the initial temperature of the cooker bottom is too high according to the change of the temperature of the cooker bottom in the set time;
the control device determining whether the initial temperature of the cooker bottom is too high according to the change of the temperature of the cooker bottom comprises:
when the temperature of the cooker bottom changes from falling to rising within a set time, determining that the initial temperature of the cooker bottom is too high;
the gas stove further comprises a flow regulating system which is coupled with the gas pipeline and is used for regulating the flow of the gas flowing through the gas pipeline; the flow regulating system includes:
the flow valve is arranged on the gas pipeline;
the driving mechanism is coupled with the flow valve, and the opening of the flow valve is adjusted when the driving mechanism operates; the method comprises the steps of,
the protection device is used for controlling the opening or closing of the gas pipeline or controlling the ignition device of the gas stove to flameout;
wherein the control device is further configured to:
when the initial temperature of the cooker bottom is determined to be too high, controlling the protection device to be in a locked and non-action state;
the gas stove further comprises a receiving device for receiving a user instruction; the control device is also used for controlling the driving mechanism to operate according to the user instruction;
when the state of the cooker is determined to be changed from the initial temperature of the bottom of the cooker to be too high, the protection device is controlled to be unlocked to enter a normal working state.
6. The gas cooker as claimed in claim 5, wherein the control means determines a change in temperature of the cooker bottom over a set time period includes:
calculating an average value of the temperatures of two or more cooker bottoms continuously detected by the first detection device; the method comprises the steps of,
a gradient of change in the average temperature of the two or more cookware pans over the set time is determined.
7. The gas range according to claim 5 or 6, further comprising:
a second detecting means for detecting whether the cooker is placed on the gas range; the method comprises the steps of,
a third detecting device for detecting flame temperature of the gas stove to determine whether the gas stove is in an ignition state;
when the cooker is arranged on the gas stove and the gas stove is in a firing state, the control device controls the gas stove to time according to the set time.
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