CN209876998U - Gas kitchen ranges - Google Patents

Abstract

The utility model discloses a gas stove belongs to domestic appliance technical field. 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 for a set time; and determining whether the temperature of the cooker is initially too high according to the change of the temperature of the cooker in the set time. The utility model discloses a gas-cooker judges whether the cooking utensil initial temperature is too high according to the change of the temperature of cooking utensil, avoids the initial temperature too high to cause the erroneous judgement to the culinary art process, improves the degree of accuracy of the intellectuality and the operation of automatic culinary art.

Description

Gas kitchen ranges

Technical Field

The utility model relates to a cooking utensils technical field, in particular to gas-cooker.

Background

The gas stove is an important cooking appliance in modern family kitchens, and the traditional gas stove controls the opening of a flow valve through mechanical structures such as a knob and the like so as to adjust the firepower. For the intelligent cooker, as the pot bottom temperature sensor is additionally arranged to sense the pot bottom temperature in the cooking process, the alarm judgment and the cooking process are related to the pot bottom temperature sensed by the pot bottom temperature sensor at any time, the pot bottom temperature is not always close to the room temperature at the beginning of each cooking process, and the situation that the initial temperature is high may exist. When the initial temperature of the pot bottom is high, the cooking process and the alarm protection judgment program are greatly interfered, and the wrong protection action or the wrong cooking process jump is easily caused, so that the wrong operation of the automatic cooking process is caused.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a gas-cooker detects the temperature of cooking utensil to judge whether the cooking utensil initial temperature is too high according to the change of the temperature of cooking utensil, avoid the initial temperature too high to cause the erroneous judgement to the culinary art process, improve the intellectuality and the degree of accuracy of automatic culinary art. 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 the utility model discloses a first aspect provides a gas-cooker, includes: ignition, combustor and gas pipeline, the gas pipeline with the combustor is connected, still includes: a first detecting device for detecting the temperature of the cooker on the gas stove; and control means for determining a change in temperature of the cooker within a set time; and determining whether the temperature of the cooker is initially too high according to the change of the temperature of the cooker in the set time.

Optionally, wherein the control means determines whether the cooker has an initial overheat according to the change in the temperature of the cooker includes: when the temperature of the cooker changes from descending to ascending within a set time, it is determined that the initial temperature of the cooker is too high.

Optionally, wherein the control means determining a change in temperature of the cooker over a set time comprises: calculating an average value of the temperatures of two or more of the cookers continuously detected by the first detecting means; and determining a gradient of change in the average value of the temperatures of the two or more cookers within the set time.

Optionally, the method further comprises: second detecting means for detecting whether the cooker is placed on the gas range; the third detection device is used for detecting the flame temperature of the gas stove to determine whether the gas stove is in a firing state; when the cooker is placed 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 conduit for regulating the flow of gas therethrough, comprising: the flow valve is arranged on the gas pipeline; and the driving mechanism is coupled with the flow valve, and the opening degree of the flow valve is adjusted when the driving mechanism operates.

Optionally, the method further comprises: and the protection device is used for controlling the opening or closing of the gas pipeline or controlling the ignition device to extinguish.

Optionally, 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 non-operation state.

Optionally, wherein the control device is further configured to: and when the state of the cooker is determined to be changed from the initial over-high temperature, controlling the protection device to be unlocked and enter a normal working state.

Optionally, the control device further comprises a storage unit for storing a direction variable to indicate the gradient of change; wherein the direction variable is positive when the gradient of change is rising; when the gradient of change is decreasing, the direction variable is negative; when the gradient of the change is constant, the direction variable is zero.

Optionally, the method further comprises: and the alarm device is used for controlling the control device to alarm and remind when the control device determines that the initial temperature of the cooker is too high.

Optionally, the method further comprises: and the display device is used for displaying the overhigh initial temperature under the control of the control device when the control device determines that the initial temperature of the cooker is overhigh.

The utility model discloses embodiment's gas-cooker detects the temperature of cooking utensil to whether the situation of change according to the temperature of cooking utensil judges for the initial temperature too high, for automatic culinary art process provides correct reference data and input information, improves the accuracy and the intellectuality of automatic culinary art.

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 view illustrating a structure of a gas range according to an exemplary embodiment;

fig. 2 is a schematic view illustrating a structure of a gas range according to another exemplary embodiment;

FIG. 2A is a data structure diagram of a gas range shown in accordance with an exemplary embodiment;

FIG. 3A is a flow chart illustrating a control method for a gas range according to an exemplary embodiment;

FIG. 3B is a flow chart illustrating a control method for a gas range according to another exemplary embodiment;

FIG. 4A is a flow chart illustrating a control method for a gas range according to another exemplary embodiment;

FIG. 4B is a flow chart illustrating a control method for a gas range according to another exemplary embodiment;

FIG. 4C is a flow chart illustrating a control method for a gas range according to another exemplary embodiment;

FIG. 4D is a flow chart illustrating a control method for a gas range according to another exemplary embodiment;

FIG. 4E is a flow chart 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 pipeline; 4. a flow valve; 5. a drive mechanism; 6. a control device; 7. an electromagnetic valve; 8. a pan bottom temperature sensor; 9. a spring mechanism; 10. a microswitch; 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 incorporate structural, logical, electrical, process, and other changes. The examples merely typify 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 "utility model" merely for convenience and without intending to voluntarily limit the scope of this application to any single utility model or utility model concept if more than one is in fact disclosed. Herein, 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 requiring or implying any actual such relationship or order between such entities or actions. Also, 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 an … …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. The embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. As for the methods, products and the like disclosed by the embodiments, the description is simple because the methods correspond to the method parts disclosed by the embodiments, and the related parts can be referred to the method parts for description.

Fig. 1 is a schematic structural view of a gas range according to the present invention according to an exemplary embodiment. As shown in fig. 1, the utility model discloses a gas stove of embodiment includes: ignition 1, combustor 2 and gas pipeline 3, gas pipeline 3 with combustor 2 is connected, still includes: a flow regulating system coupled to the gas pipeline 3 for regulating the flow of gas flowing through the gas pipeline 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 the control device 6 is used for controlling the operation of the driving mechanism 5.

In the scheme, the flow regulating system is coupled with the gas pipeline of the gas stove to regulate the flow of the gas flowing through the gas pipeline, so that the firepower of the burner is regulated, the automatic regulation of the firepower is realized, and the possibility is provided for realizing automatic cooking.

In the above scheme, the flow rate adjusting system comprises: 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 driving mechanism to operate. As an example, the flow valve is a plug valve and the driving mechanism is a stepping motor.

In the above scheme, the method further comprises: the electromagnetic valve 7 is connected with the flow valve in series and arranged on a gas pipeline to connect a gas source and a burner, the control device 6 is electrically connected with the electromagnetic valve 7, the connection and the disconnection of the gas pipeline and the gas source are controlled by the on-off of the control electromagnetic valve 7, when necessary, for example, when the temperature of a detected cooker and the temperature of flame are all reduced to a set range within a set time, the gas stove is judged to have abnormal combustion, the burner is abnormal in ignition and cannot normally combust, at the moment, in order to avoid gas leakage, the electromagnetic valve is used for cutting off the connection of the gas pipeline and the gas source, so that safety accidents are avoided, and the reliability of the gas stove is improved.

Further comprising: 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, the preset instruction set may include, for example, cooking parameters such as cooking time, cooking temperature, and end condition, the cooking parameters may be a plurality of sets of parameter arrays corresponding to the cooking time and the cooking temperature/fire, the control device adjusts the flow rate of gas introduced into the burner in each cooking time period according to the cooking parameters, so as to realize control of the cooking fire, and performs automatic cooking according to a preset time period and flame temperature by combining with the timer.

The working mode options of the cooking parameters corresponding to the control panel can be, for example: cooking porridge, stir-frying, boiling water, cooking soup, cooking noodles, frying and the like. And when the receiving device receives a user instruction to indicate one of the cooking modes, the control device calls the prestored parameter array of the cooking mode and adjusts the parameter array to the corresponding cooking temperature within a set time period.

As an example, when in the soup cooking mode, the first 10 minutes is set, the boiling is continued with the larger fire power, the cooking temperature/flame temperature/cooker temperature is set to 200-. Other cooking modes refer to the setting flow, and correspondingly increase or decrease, for example, an automatic flameout program is set in a timing mode, and a control flow for frying dishes, turning a pot and not extinguishing fire in a vibration state is added in a quick-frying mode; in the water boiling mode, the automatic fire extinguishing is performed in a state where the time for which the temperature of the cooker reaches 110 ℃ is set to be greater than or equal to 5 s.

In the above solution, as an example, the receiving device 11 is integrated in the control panel, and is disposed on the working platform of the gas cooker, and the receiving device is connected with the control device in a wired or wireless manner.

As another example, further comprising: communication module 12, be connected with the receiving arrangement electricity, an instruction for receiving user, and send controlling means, controlling means controls the operation of gas-cooker according to user's instruction, realize the long-range of gas-cooker, off-line control, for example, can send the instruction to communication module through mobile terminal's APP, after receiving arrangement and communication module electricity are connected, receive user's instruction, controlling means controls opening and closing of gas-cooker according to user's instruction, when the user leaves the family and forgets to close the gas-cooker, can send the instruction to the gas-cooker through mobile terminal, cut off the gas that lets in the gas-cooker, close the gas-cooker, improve the security of gas-cooker.

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 detection device detects the temperature of 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 the trigger mechanism, is set up in the centre of the burner, is used for detecting the placement state of the cooking utensil; the third detection device is a flame temperature sensor arranged beside the cooker and used for detecting the temperature of flame; wherein the pot bottom temperature sensor 8 is arranged at the center of the burner 2 through a spring mechanism 9, so that the pot bottom temperature sensor is attached to the bottoms of cookers with different structures.

In the scheme, the pot bottom temperature sensor 8 adopts a negative temperature coefficient NTC thermistor and carries out linearization treatment at the common cooking temperature of 40-280 ℃; the flame temperature sensor adopts a K-type thermocouple which can resist the combustion temperature of gas.

The utility model discloses a control method for gas-cooker is through placing the thermocouple flame temperature sensor at the furnace end and placing the thermal resistance bottom of a boiler temperature sensor simultaneous perception culinary art temperature that can with bottom of a boiler direct contact in the middle part of the furnace end, through the solenoid valve switch as protection action output, the protection is accurate, quick, and the protection rate of accuracy is high, and the mistake protection probability is low.

As another example, a triggering mechanism, i.e., second detecting means, is provided at the center of the burner to detect the placement state of the cooker, and is provided corresponding to a spring mechanism to which a pan bottom temperature sensor is mounted, and when the cooker is placed on the burner, the spring mechanism is deformed to trigger the connected triggering mechanism for detecting whether the cooker is placed on the burner. The trigger mechanism is a microswitch.

The microswitch is triggered closed by the spring mechanism when the cookware is placed on the burner and is opened when the cookware is removed from the burner.

As an example, wherein the control means is further adapted to determine a change in temperature of said cookware within a set time; and determining whether the temperature of the cooker is initially too high according to the change of the temperature of the cooker in the set time.

In the foregoing aspect, wherein the control means determines whether the cooker has an initial overheat according to the change in the temperature of the cooker includes: when the temperature of the cooker changes from descending to ascending within a set time, it is determined that the initial temperature of the cooker is too high.

In the foregoing aspect, wherein the control means determining a change in the temperature of the cooker over a set time includes: calculating an average value of the temperatures of two or more of the cookers continuously detected by the first detecting means; and determining a gradient of change in the average value of the temperatures of the two or more cookers within the set time.

In the above scheme, the third detection device is configured to detect a flame temperature of the gas stove to determine whether the gas stove is in a firing state; wherein, when the cooker is placed on the gas range and the gas range is in a firing state, the control device controls a timing device such as a timer to time 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 ignition device to extinguish; 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 non-operation state.

In the foregoing solution, the control device is further configured to: and when the state of the cooker is determined to be changed from the initial over-high temperature, controlling the protection device to be unlocked and enter a normal working state.

In the above solution, the control device further includes a storage unit, configured to store a direction variable to indicate the change gradient; wherein the direction variable is positive when the gradient of change is rising; when the gradient of change is decreasing, the direction variable is negative; when the gradient of the change is constant, the direction variable is zero.

In the foregoing solution, the control device is further configured to: and when the cooker is determined to be over-high in initial temperature, controlling the protection device to be locked in a non-action state.

When the gas stove is connected with commercial power to normally work, a control device, such as a main control MCU (microprogrammed control Unit), collects temperature values from a pot bottom temperature sensor in real time at the frequency of 2Hz, performs sliding average according to 10 sampling point windows, and stores the temperature sliding average for 1 minute for 120 in total; a control device, such as a main control MCU (microprogrammed control Unit), collects temperature values from the flame temperature sensor in real time at a frequency of 2Hz, performs sliding tie according to 10 sampling point windows, and stores the temperature sliding average value for 1 minute for 120 in total; the main control MCU also collects the jumping state of the pot bottom trigger mechanism/the microswitch in an I/O port interruption mode and continuously collects the current closing state value of the microswitch; the main control MCU initializes a timing device/special timer to prepare for overtime judgment; initializing two integer variables, and respectively recording the current real-time temperature value of the pot bottom and the real-time flame temperature value; initializing a direction variable/integer variable, and recording the direction of the current temperature gradient value; and initializing an integer variable, and recording a real-time result mark for judging the initial over-temperature. These variables together make up the cooktop temperature false alarm prevention data structure, as shown in fig. 2A.

When the master control MCU monitors that the micro switch is interrupted from opening to closing of the I/O port, the state of the micro switch is judged again, and if the micro switch is continuously closed state level for many times, the cooker is considered to be placed on a cooking bench and a special timer is started. And meanwhile, judging whether the flame is in a firing state or not according to the current flame temperature value. And judging the change trend of the temperature of the pot bottom through the pot bottom temperature sliding average array, and updating the gradient change direction variable of the temperature of the pot bottom. When the real-time value of the temperature of the pot bottom is obviously higher than the conventional set temperature, firstly waiting for the change direction of the temperature gradient to be changed from positive direction to 0 or negative direction; and then waiting for the change direction of the temperature gradient to turn to 0 again from the negative direction or turn to the positive direction, namely the temperature of the pot bottom shows the trend of rising after falling. During the waiting period, the judgment result mark is always set to be over-high in the suspected initial temperature, and the protection logic does not act. When the waiting condition is met, the judgment result mark is set to confirm that the initial temperature is too high, and the protection logic does not act.

If the temperature gradient is not in a stage of changing from positive direction to 0 or negative direction, but is directly in positive direction and in 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 operates according to normal protection logic. In the cooking process stage, when the judgment result mark is suspected that the initial temperature is too high, the cooking process temporarily locks the current stage until the judgment result mark is that the initial temperature is too high or the timer reaches a set value, the current stage is unlocked, and whether the next process is started or not is judged continuously according to the cooking process or the cooking is finished due to protection logic action.

The phenomenon of misjudgment caused by the shaking or mutation of the numerical value of the sensor is avoided by adopting a sliding average mode and the trend judgment of the temperature gradient, the rising and falling process of the temperature gradient is judged to directly determine whether the kitchen range with overhigh initial temperature is suitable for the occurrence conditions of protection logic and cooking skip logic, and the use of the timer ensures an overtime exit mechanism when the false judgment prevention logic of all kitchen ranges fails. The phenomenon of misjudgment of a protection device/protection logic or a cooking flow when the kitchen range with overhigh initial temperature is used is reduced on the whole, and the intellectualization of automatic cooking is improved.

As a further example, further comprising: and the alarm device 13 is electrically connected with the control device and gives an alarm when the temperature of the cooker or the temperature of flame is too high to reach a certain set value.

As another example, the alarm device is further used for performing alarm reminding under the control of the control device when the control device determines that the initial temperature of the cooker is too high.

Wherein, still include: and the display device is used for displaying the overhigh initial temperature under the control of the control device when the control device determines that the initial temperature of the cooker is overhigh. As an example, a flashing reminder may be made.

Fig. 2 is a schematic structural view of a gas range according to another exemplary embodiment.

Fig. 3A is a flowchart illustrating a control method for a gas range according to an exemplary embodiment. As shown in fig. 3A, the control method for a gas stove according to an embodiment of the present invention includes: in step S110, a user instruction is received; in step S122, the flow rate of the gas introduced 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 adjusted according to the instruction of a user, so that the cooking firepower/temperature is adjusted, and the possibility is provided for realizing 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, the preset instruction set may include, for example, cooking parameters such as cooking time, cooking temperature, and end condition, the cooking parameters may be a plurality of sets of parameter arrays corresponding to the cooking time and the cooking temperature/fire, the control device adjusts the flow rate of gas introduced into the burner in each cooking time period according to the cooking parameters, so as to realize control of the cooking fire, and performs automatic cooking according to a preset time period and flame temperature by combining with the timer.

The working mode options of the cooking parameters corresponding to the control panel can be, for example: cooking porridge, stir-frying, boiling water, cooking soup, cooking noodles, frying and the like. And when the receiving device receives a user instruction to indicate one of the cooking modes, the control device calls the prestored parameter array of the cooking mode and adjusts the parameter array to the corresponding cooking temperature within a set time period.

As an example, when in the soup cooking mode, the first 10 minutes is set, the boiling is continued with the larger fire power, the cooking temperature/flame temperature/cooker temperature is set to 200-. Other cooking modes refer to the setting flow, and correspondingly increase or decrease, for example, an automatic flameout program is set in a timing mode, and a control flow for frying dishes, turning a pot and not extinguishing fire in a vibration state is added in a quick-frying mode; in the water boiling mode, the automatic fire extinguishing is performed in a state where the time for which the temperature of the cooker reaches 110 ℃ is set to be greater than or equal to 5 s.

Fig. 3B is a flowchart illustrating a control method for a gas range according to an exemplary embodiment. A control method for a gas range of an embodiment as shown in fig. 3B, further comprising: in step S112, the temperature of the cooker on the gas range is detected; in step S120, the flow rate of the gas introduced into the gas range is adjusted according to the user instruction and the temperature of the cooker.

As an example, adjusting the flow rate of the gas introduced into the gas range according to the temperature of the cooker includes: and when the temperature of the cooker is higher than a first set temperature value and the cooker is not arranged on the burner, gradually reducing the flow of the gas introduced 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 placed on the burner again, the flow of the gas introduced into the gas stove is adjusted to be recovered to the state before the reduction.

In the above scheme, adjusting the flow of the gas introduced into the gas cooker according to the temperature of the cooker further comprises: and when the temperature of the cooker is higher than the first set temperature value and the time for placing the cooker on the burner is longer than the first set time, cutting off the gas introduced into the gas stove.

The gas stove is an important cooking appliance in modern family kitchens, has certain danger due to the fact that gas is used for combustion as a heating mode, and can frequently generate 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 safety hazards is a tangible requirement for each consumer and is a direction of development for various large appliance manufacturers. The utility model discloses a control method for gas-cooker of exemplary embodiment mainly solves the ignition protection problem of the complete culinary art in-process of a key cooking stove, has that the protection is accurate, quick, and the protection rate of accuracy is high, the low advantage of mistake protection probability.

Referring to fig. 4A, at any stage, if the time that the temperature value of the pan bottom temperature sensor collected by the control device/central controller is larger than the first set value of 298 degrees centigrade is larger than the first set time of 3 seconds, and the trigger mechanism/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 drive mechanism/stepper motor is controlled to drive the plug valve to return to a zero position, the opening degree of the flow valve is driven to be minimum or closed, or the electromagnetic valve is controlled to cut off the gas supply loop, so that the gas flowing into the gas stove is cut off, the gas stove is closed, or the panel LED can be simultaneously driven to display a dry combustion error code, and the buzzer continuously prompts for. If the microswitch is in an off state at the moment, the cooker leaves the cooking bench, the flow of the gas introduced into the gas stove is gradually reduced according to a set time interval, for example, 10 seconds, no prompt is given within 10 seconds, an internal timer is paused, after 10 seconds, a stepping motor is controlled to drive a plug valve to reduce 2-gear firepower, a panel LED is driven to display early warning of the cooker leaving, and a buzzer continuously gives a prompt at the frequency of 3 HZ; controlling a stepping motor to drive a plug valve to reduce to the lowest grade firepower after 10 seconds, namely 20 seconds, simultaneously driving a panel LED to display a warning of separating from a cooking bench, and continuously prompting by a buzzer 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 buzzing. If the micro switch is closed again in the early warning and warning generation stage of the cooking bench, the early warning and warning states are eliminated, the stepping motor is controlled to drive the plug valve to recover the current firepower, the panel LED is driven to recover the cooking process display, the buzzer sound is eliminated, and the operation of the internal timer is recovered.

The utility model discloses a control method for gas-cooker passes through the LED of panel and bee calling organ and simultaneously to user propelling movement failure alarm information, and different display content and bee calling organ ring the mode and show different alarming meaning, have many perceptions mode, audio-visual advantage.

In the above scheme, the method further comprises: detecting the flame temperature of the gas stove; in the ignition stage, when the flame temperature is less than a second temperature set value within a second set time, the gas introduced into the gas stove is cut off.

Referring to fig. 4B, in the ignition stage, after the ignition signal is sent, the central controller of the control device continuously detects the temperature value of the flame temperature sensor, stops sending the ignition signal when the temperature value is detected to be significantly increased within 10 seconds, and controls the electromagnetic valve to cut off the air supply loop when the ignition signal is stopped sending if the temperature value is not detected to be significantly increased within 10 seconds.

In the above scheme, the method further comprises: and judging whether the temperature of the pot bottom/the cooker detected by the pot bottom temperature sensor is within a set temperature range or not, 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 pot bottom temperature sensor is short-circuited.

Referring to fig. 4C, after normal ignition, if the control device determines that the temperature sensor is open-circuited or the temperature value is obviously abnormal for 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 driving panel LED displays the abnormal prompt of the temperature probe, and the buzzer continuously prompts for 20 seconds at the frequency of 2 Hz.

As an example, it further includes: and after the ignition is finished, cutting off the gas introduced into the gas stove when the flame temperature drops to exceed a third temperature set value and the temperature of the cooker drops to exceed a fourth temperature set value within a third set time.

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 continuously decreasing trend, and the pan bottom temperature sensor continuously detects that the temperature of the pan bottom/cooker decreases slowly, 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 the zero position, the driving panel LED displays an accidental flameout prompt, and the buzzer continuously prompts for 10 seconds at a frequency of 1 Hz.

As an example, it further includes: and receiving an ignition instruction, and judging whether the temperature of the cooker detected by the cooker 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 pot bottom temperature sensor is greater than 280 degrees celsius, the ignition function is disabled.

After normal cooking begins, the cooking time of the current stage is recorded through the timer, when other protections do not occur and the cooking time of the final stage is reached, 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 LED of the driving panel displays normal cooking finishing information, 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. A control method for a gas range of one embodiment 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 within a set time is determined; in step S220, it is determined whether the temperature of the cooker is initially too high according to a change in the temperature of the cooker within the set time.

In the foregoing aspect, wherein the determining whether the temperature of the cooker is initially too high according to the change in the temperature of the cooker includes: in step S222, when the temperature of the cooker changes from a drop to a rise 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 of the temperatures of two or more of the cookers detected consecutively; determining a gradient of change in the average value of the temperatures of the two or more cookers over the set time.

Fig. 6 and 7 are flow charts illustrating a control method for a gas range according to another exemplary embodiment. A control method for a gas range according to an embodiment shown in fig. 6 and 7, before detecting a temperature of a cooker on the gas range; further comprising: detecting whether the cooker is placed on the gas stove; detecting the flame temperature of the gas stove to determine whether the gas stove is in a firing state; when the cooker is placed on the gas stove and the gas stove is in a firing state, timing is controlled according to the set time.

As an example, it further includes: setting a direction variable to indicate the gradient of change; wherein the direction variable is positive when the gradient of change is rising; when the gradient of change is decreasing, the direction variable is negative; when the gradient of the change is constant, the direction variable is zero.

In the above scheme, the method further comprises: when it is determined that the cooker is initially over-warmed, the protection device is controlled to be locked in the non-operation state in step S310.

When the gas stove is connected with commercial power to normally work, the control device/the main control MCU collects temperature values from the pot bottom temperature sensor in real time at the frequency of 2Hz, performs sliding average according to 10 sampling point windows, and stores the temperature sliding average values for 1 minute for 120 in total; 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 the temperature sliding average value for 1 minute for 120 in total; the main control MCU also collects the jumping state of the microswitch of the pot bottom temperature sensor in an I/O port interruption mode and continuously collects the current closing state value of the microswitch; the main control MCU initializes a special timer to prepare for overtime judgment; initializing two integer variables, and respectively recording the current real-time temperature value of the pot bottom and the real-time flame temperature value; initializing an integer variable and recording the current temperature gradient value direction; initializing an integer variable, and recording a real-time result mark of the initial over-temperature judgment. These variables together constitute the range temperature false-judgment prevention data structure.

When the master control MCU monitors that the micro switch is interrupted from opening to closing of the I/O port, the state of the micro switch is judged again, and if the micro switch is continuously closed state level for many times, the cooker is considered to be placed on a cooking bench and a special timer is started. And meanwhile, judging whether the flame is in a firing state or not according to the current flame temperature value. And judging the change trend of the temperature of the pot bottom through the pot bottom temperature sliding average array, and updating the gradient change direction variable of the temperature of the pot bottom. When the real-time value of the temperature of the pot bottom is obviously higher than the conventional set temperature, firstly waiting for the change direction of the temperature gradient to be changed from positive direction to 0 or negative direction; and then waits for the temperature gradient change direction to turn to 0 again from the negative direction or to turn to the positive direction. During the waiting period, the judgment result mark is always set to be over-high in the suspected initial temperature, and the protection device/logic does not act. When the waiting condition is met, the judgment result mark is set to confirm that the initial temperature is too high, and the protection device/logic does not act.

If the temperature gradient is not in a stage of changing from positive direction to 0 or negative direction, but is directly in positive direction and in 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 operates according to normal protection logic. In the cooking process stage, when the judgment result mark is suspected that the initial temperature is too high, the cooking process temporarily locks the current stage until the judgment result mark is that the initial temperature is too high or the timer reaches a set value, the current stage is unlocked, and whether the next process is started or not is judged continuously according to the cooking process or the cooking is finished due to protection logic action.

The phenomenon of misjudgment caused by the shaking or mutation of the numerical value of the sensor is avoided by adopting a sliding average mode and the trend judgment of the temperature gradient, the rising and falling process of the temperature gradient is judged to directly determine whether the kitchen range with overhigh initial temperature is suitable for the occurrence conditions of protection logic and cooking skip logic, and the use of the timer ensures an overtime exit mechanism when the false judgment prevention logic of all kitchen ranges fails. The phenomenon of misjudgment of protection logic or cooking flow existing when the kitchen range with overhigh initial temperature is used is reduced on the whole.

The utility model discloses embodiment's a control method for gas-cooker determines whether the initial temperature is too high according to the change of pot bottom temperature, avoids because of the erroneous judgement of the relevant protection device protection logic that the initial temperature is too high arouses, improves the intelligent level and the automation level of gas-cooker.

The related exemplary description of the control method for the gas stove of the above scheme refers to the related exemplary description in the gas stove of fig. 1-2A, which is not repeated herein.

Those of skill in the art would 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 implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention. It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described systems, apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again. In the embodiments disclosed herein, it should be understood that the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units is only one logical division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed correspondence or direct correspondence or communication connection between each other may be through some interfaces, indirect correspondence or communication connection of devices or units, and may be in an electric, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed 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 can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.

Claims (10)

1. A gas range comprising: ignition, combustor and gas pipeline, the gas pipeline with the combustor is connected, its characterized in that still includes:

a first detecting device for detecting the temperature of the cooker on the gas stove; and the number of the first and second groups,

control means for:

determining a change in temperature of the cooker for a set time, determining whether the cooker is initially over-heated based on the change in temperature of the cooker for the set time:

wherein it is determined that the initial temperature of the cooker is excessively high when the temperature of the cooker changes from a decrease to an increase within a set time.

2. The gas range of claim 1, wherein the control means determining the change in the temperature of the cooker for a set time includes:

calculating an average value of the temperatures of two or more of the cookers continuously detected by the first detecting means; and the number of the first and second groups,

determining a gradient of change in the average value of the temperatures of the two or more cookers over the set time.

3. The gas range of claim 1 or 2, further comprising:

second detecting means for detecting whether the cooker is placed on the gas range; and the number of the first and second groups,

the third detection device is used for detecting the flame temperature of the gas stove so as to determine whether the gas stove is in a firing state or not;

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.

4. The gas range of claim 3, further comprising:

a flow regulating system coupled to the gas conduit for regulating the flow of gas therethrough, comprising:

the flow valve is arranged on the gas pipeline;

and the driving mechanism is coupled with the flow valve, and the opening degree of the flow valve is adjusted when the driving mechanism operates.

5. The gas range of claim 4, further comprising:

and the protection device is used for controlling the opening or closing of the gas pipeline or controlling the flameout of the ignition device of the gas stove.

6. The gas range of claim 5, 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 non-operation state.

7. The gas range according to claim 5 or 6, wherein the control device is further configured to:

and when the state of the cooker is determined to be changed from the initial over-high temperature, controlling the protection device to be unlocked and enter a normal working state.

8. The gas range of claim 7, wherein the control means further comprises a storage unit for storing a direction variable to indicate a change gradient; wherein the direction variable is positive when the gradient of change is rising; when the gradient of change is decreasing, the direction variable is negative; when the gradient of the change is constant, the direction variable is zero.

9. The gas range of claim 8, further comprising: an alarm device is arranged on the base plate,

and the control device is used for controlling the control device to carry out alarm reminding when the control device determines that the initial temperature of the cooker is too high.

10. The gas range of claim 9, further comprising: and the display device is used for displaying the overhigh initial temperature under the control of the control device when the control device determines that the initial temperature of the cooker is overhigh.