Gas stove control circuit, method and gas stove

Abstract

The present invention discloses a gas stove control circuit, method and gas stove, wherein the gas stove control circuit comprises: an ignition detection circuit, the number of which corresponds to the number of gas stove burners; an ignition detection circuit, which is used to detect the ignition state of the corresponding gas stove burner and output a corresponding ignition detection signal; a main controller, which has an automatic shutoff mode for controlling multiple burners to automatically shut off, and is used to control any one of the remaining unignited burners to be in a shutoff state when any one of the multiple burners is determined to be in an ignition state according to the ignition detection signal, and to last for a first preset time, and to obtain a voltage value of a gas stove battery after controlling the remaining unignited burners to be in a shutoff state, and to determine whether to disable the automatic shutoff mode according to the obtained voltage value of the gas stove battery. The present invention improves the safety and reliability of the gas stove.

Description

Technical Field

[0001] The present invention relates to the technical field of kitchen appliances, and in particular to a gas stove control circuit, method and a gas stove. Background Art

[0002] The development of gas stoves pays more and more attention to the issue of safety. In the application of gas stove intelligent control, the function of controlling the flameout by circuit is increasingly used, such as setting the timed flameout on the touch screen, flameout to prevent dry burning, remote flameout and other automatic flameout functions of gas stoves. In the flameout process, it is necessary to ensure that the battery is fully charged. If the battery voltage is too low, there may be a danger of not being able to turn off the flame smoothly. Summary of the invention

[0003] The main purpose of the present invention is to provide a gas stove control circuit, method and gas stove, aiming to improve the safety and reliability of the gas stove.

[0004] To achieve the above object, the present invention provides a gas stove control circuit, which is applied to a gas stove with a battery and multiple burners. The gas stove control circuit includes:

[0005] Ignition detection circuits, the number of which corresponds to the number of gas stove burners; the ignition detection circuits are used to detect the ignition state of the corresponding gas stove burner and output a corresponding ignition detection signal;

[0006] a main controller having an automatic shutoff mode for controlling the multiple burners to automatically shut off, and for controlling any one of the remaining unignited burners to be in a shutoff state for a first preset time when any one of the multiple burners is determined to be in an ignited state according to the ignition detection signal, and

[0007] After controlling the remaining unignited burners to be in the off state, the voltage value of the gas stove battery is obtained, and it is determined whether to disable the automatic off mode according to the obtained voltage value of the gas stove battery.

[0008] Optionally, the main controller is specifically configured to include:

[0009] Comparing the detected voltage value of the gas stove battery with a preset voltage threshold;

[0010] When the detected voltage value of the gas stove battery is less than or equal to a preset voltage threshold, the gas stove is controlled to enter a low battery mode and the automatic flameout mode is disabled;

[0011] When the detected voltage value of the gas stove battery is greater than the preset voltage threshold, the automatic flameout mode is not disabled, and the flameout state control of the remaining unignited burners is released.

[0012] Optionally, the gas stove control circuit further includes:

[0013] A voltage detection switch control circuit, wherein the controlled end of the voltage detection switch control circuit is connected to the voltage control end of the main controller, the detection end of the voltage detection switch control circuit is connected to the battery, and the output end of the voltage detection switch control circuit is connected to the voltage feedback end of the main controller; wherein,

[0014] The voltage detection switch control circuit is used to turn on when receiving the voltage detection control signal from the main controller to detect the voltage value of the gas stove battery.

[0015] Optionally, the gas stove control circuit further includes:

[0016] A micro switch, wherein the micro switch is arranged corresponding to the gas rotary valve of the gas stove, and the micro switch is triggered to close when the gas rotary valve rotates;

[0017] Thermocouples are provided corresponding to the burners of the gas stove;

[0018] The ignition detection circuit is specifically used to output the ignition detection signal upon detecting that the micro switch is closed and / or according to the electromotive force generated by the thermocouple.

[0019] Optionally, the gas stove control circuit further includes:

[0020] A power conversion circuit, the input end of which is connected to the battery, and the power conversion circuit is used to convert the electric energy of the battery and then output it;

[0021] The main controller is also used to operate when receiving electric energy from the power conversion circuit and output an enable control signal to control the power conversion circuit to maintain electric energy output.

[0022] Optionally, the gas stove control circuit further includes:

[0023] A power startup control circuit, wherein the control end of the power startup control circuit is connected to the controlled end of the power conversion circuit; the power startup control circuit is used to control the power conversion circuit to work when the micro switch is closed, so as to convert the electrical energy of the battery and output it.

[0024] Optionally, the gas stove control circuit further includes:

[0025] A flame-off circuit, the number of which corresponds to the number of the gas stove burners, and a controlled end of the flame-off circuit is connected to the main controller;

[0026] The main controller is also used to control the operation of the fire-off circuit and turn off the fire of the corresponding gas stove burner when receiving a fire-off trigger signal.

[0027] The present invention further provides a gas stove control method, which is applied to a gas stove having a battery and multiple burners. The gas stove control method includes:

[0028] Detect the ignition status of the corresponding gas stove burner and output the corresponding ignition detection signal;

[0029] When it is determined according to the ignition detection signal that any one of the plurality of burners is in an ignition state, any one of the remaining burners that are not ignited is controlled to be in an off state for a first preset time, and

[0030] After controlling the remaining unignited burners to be in the off state, the voltage value of the gas stove battery is obtained, and it is determined whether to disable the automatic off mode according to the obtained voltage value of the gas stove battery.

[0031] Optionally, the step of determining whether to disable the automatic shutoff mode according to the detected voltage value of the gas stove battery specifically includes:

[0032] Comparing the detected voltage value of the gas stove battery with a preset voltage threshold;

[0033] When the detected voltage value of the gas stove battery is less than or equal to a preset voltage threshold, the gas stove is controlled to enter a low battery mode and the automatic flameout mode is disabled;

[0034] When the detected voltage value of the gas stove battery is greater than the preset voltage threshold, the automatic flameout mode is not disabled, and the flameout state control of the remaining unignited burners is released.

[0035] The present invention also provides a gas stove, comprising the gas stove control circuit as described above.

[0036] The ignition control circuit of the present invention is provided with an ignition detection circuit, and the number of the ignition detection circuits corresponds to the number of the burners of the gas stove, so as to detect the ignition state of the corresponding burners of the gas stove, and output the corresponding ignition detection signal to the main controller, so that when the main controller determines that any one of the burners is in the ignition state according to the ignition detection signal, any one of the remaining burners that are not ignited is controlled to be in the off state, and lasts for a first preset time, and after the remaining burners that are not ignited are controlled to be in the off state, the voltage value of the gas stove battery is obtained, and whether to disable the automatic off mode is determined according to the obtained voltage value of the gas stove battery 30. The present invention can realize the voltage detection when the gas stove is turned off by controlling the execution of the off action of the unignited burner without affecting the working state of the burner that is starting the ignition work. The present invention can ensure that the battery is sufficient before the user needs to start the touch display screen to set the timed off, the anti-dry burning off, the remote off and other gas stove automatic off functions, and other intelligent functions, such as intelligent recipes, so that the intelligent functions of the gas stove can be used normally, thereby improving the safety and reliability of the gas stove. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0038] Figure 1 A circuit structure diagram of an embodiment of a gas stove control circuit of the present invention;

[0039] Figure 2 A circuit structure diagram of another embodiment of the gas stove control circuit of the present invention;

[0040] Figure 3 It is a flow chart of an embodiment of a gas stove control method of the present invention.

[0041] Description of Figure Numbers:

[0042] Label name Label name 10 Ignition detection circuit 50 Power start control circuit 20 Main Controller 60 Battery voltage detection circuit 30 Battery 70 Fire off circuit 40 Power conversion circuit 80 Automatic shut-off circuit 91 Temperature detection circuit 92 Power switch control circuit

[0043] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0044] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] The invention provides a gas stove control circuit which is applied to a gas stove with a battery and a plurality of burners.

[0046] Reference Figure 1 and Figure 2 In one embodiment of the present invention, the gas stove control circuit includes:

[0047] Ignition detection circuits 10, the number of which corresponds to the number of gas stove burners; the ignition detection circuits 10 are used to detect the ignition state of the corresponding gas stove burners and output corresponding ignition detection signals;

[0048] The main controller 20 has an automatic shutoff mode for controlling the multiple burners to shut off automatically, and is used to control any one of the remaining unignited burners to be in a shutoff state for a first preset time when it is determined that any one of the multiple burners is in an ignition state according to the ignition detection signal, and

[0049] After controlling the remaining unignited burners to be in the off state, the voltage value of the gas stove battery 30 is obtained, and it is determined whether to disable the automatic off mode according to the obtained voltage value of the gas stove battery 30.

[0050] In this embodiment, the ignition detection circuit 10 is used to detect the ignition state of the gas stove burner. The number of temperature detection circuits can be two or more than two, which can be specifically set according to the number of gas stoves, that is, one ignition detection circuit 10 can be set for each gas stove. The ignition detection circuit 10 converts the detected ignition state signal of the gas stove into a corresponding voltage signal, that is, an ignition detection signal, and outputs it to the main controller 20 to detect the ignition state of the gas stove burner.

[0051] The main controller 20 can be implemented by a microprocessor such as a single chip microcomputer, DSP and FPGA. Those skilled in the art can integrate some hardware circuits and software programs or algorithms in the main controller 20 to detect the temperature of the gas stove, such as integrating a memory, an ADC conversion circuit, and a filter and other hardware circuits, or a software algorithm program for analyzing and comparing the received ignition detection signal. By running or executing the software program and / or module stored in the memory of the main controller 20, and calling the data stored in the memory, and the ADC conversion circuit integrated in the main controller 20 converts the analog ignition detection signal into a digital signal, and the software algorithm program and / or hardware circuit module integrated in the main controller 20 compares and analyzes the ignition detection signal converted into a digital signal to determine whether the current gas stove burner performs an ignition action, and outputs a corresponding control signal according to the ignition detection signal of the current gas stove burner. The main controller 20 can also run or execute the software program and / or module stored in the memory of the main controller 20, and call the data stored in the memory, execute various functions of the gas stove and process data, so as to monitor the gas stove as a whole and realize intelligent control of the gas stove.

[0052] In this embodiment, the gas stove control circuit also includes a battery 30. The battery 30 can be an alkaline battery 30 or a carbon battery 30. The battery 30 is arranged in the gas stove, specifically in the knob body of the knob. The battery 30 can be detachably arranged in a preset space in the knob body, or the battery 30 can be integrated in the knob body and integrated with the knob body. The battery 30 is used to provide power to various functional modules on the electric control board of the gas stove. The battery 30 can be implemented by a primary battery 30 such as a dry cell 30, or can be set as a rechargeable battery 30 that can be recharged. Specifically, the battery 30 can be a rechargeable battery 30 such as a nickel-metal hydride (NiMH) battery 30 or a lithium-ion (Li-ion) battery 30. The electric control board of the gas stove can also be provided with a voice reminder circuit, a wireless circuit, a temperature detection sensor, a gas detection sensor, and an LED indication circuit, etc. The battery 30 is electrically connected to the electric control board, so that when the gas stove is working, the above circuit modules are powered to realize intelligent control of the gas stove.

[0053] The gas stove control circuit also includes a power conversion circuit 40, which can convert the power output from the battery 30 after voltage reduction, filtering, etc. into the power supply voltage of each circuit module, so as to supply power to the circuit modules arranged on the gas stove electric board, such as the voice reminder circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, and the LED indication circuit, etc. The power conversion circuit 40 can also manage and distribute the power supply for each load in the gas stove.

[0054] The working power of the main controller 20 is provided by the power conversion circuit 40. After the main controller 20 is powered on, it outputs an enable control signal to the power conversion circuit 40, thereby controlling the power conversion circuit 40 to work, so as to convert the electric energy of the battery 30 and output it, and supply power to the main controller 20, the voice reminder circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, and the LED indication circuit, etc., to realize the intelligent control of the gas stove. After the main controller 20 is powered on, the power conversion circuit 40 is controlled by the main controller 20, and whether the power start control circuit 50 works or not will not affect the work of the power conversion circuit 40. For example, in a gas stove with two or more burners, when the user turns on one of them, the power start control circuit 50 can be triggered to work, and after a period of time, when the burner is turned off and other burners are turned on, the power conversion circuit 40 will not be affected by the closure of the burner.

[0055] It is understandable that, according to the load characteristics of the battery 30, there is a difference between the no-load voltage and the loaded voltage. When carrying different loads, the load voltage is also different. The larger the load current, the more the actual battery 30 discharge charge attenuation is, the lower the battery 30 output voltage is, and when the battery 30 is insufficient, the battery 30 output voltage will be lower. In addition, the battery 30 used in the gas stove has different no-load voltage and voltage difference with the same load according to different brands and models (alkaline and carbon batteries 30), and the battery 30 load current is larger when the fire is turned off than in other working conditions. However, at present, the battery 30 voltage at ignition is detected to determine whether the fire-off voltage is met. This detection of the voltage at ignition may result in the inability to accurately determine the voltage at the time of turning off because the battery 30 voltage at ignition is different from the battery 30 voltage at the time of turning off, thereby causing a certain risk in the process of the gas stove. In this way, it is necessary to set a higher margin for the low voltage threshold to ensure that the battery 30 is suitable for various types of batteries 30 when the voltage is low.

[0056] In the application of intelligent control of gas stoves, the application of the function of turning off the fire by circuit control is increasing, such as setting the timed fire-off, anti-dry-burning fire-off, remote fire-off and other automatic fire-off functions of the gas stove by the touch display screen. When the automatic fire-off function is to be realized, the main controller 20 can control the automatic fire-off circuit 80 to work to realize automatic fire-off. The automatic fire-off circuit 80 can be integrated with a timer, a temperature sensor, etc., and according to the control signal output by the main controller 20, the automatic fire-off functions such as timed fire-off, anti-dry-burning fire-off, and remote fire-off are realized. In the process of turning off the fire, it is necessary to ensure that the battery 30 has sufficient power. If the voltage of the battery 30 is too low, there may be a danger of not being able to turn off the fire smoothly.

[0057] In order to solve the above problems, in this embodiment, the ignition detection circuit 10 and the main controller 20 both work based on the electric energy provided by the power conversion circuit 40. When a burner in the gas stove starts to ignite, the ignition detection circuit 10 can realize the burner ignition detection through the trigger switch corresponding to the burner or other trigger mechanisms that can detect the ignition action of the burner. That is, in a gas stove with multiple burners, when the user starts to start one of them, the electric control board of the gas stove is powered on, and the corresponding ignition detection circuit 10 outputs an ignition detection signal that the burner starts to work when it detects that the burner is working. When the main controller 20 determines that a burner has started to ignite according to the ignition detection signal, it controls any one of the other burners that have not been ignited to perform the fire-off action. When controlling other burners that have not been ignited to perform the fire-off action, the circuit module that controls the operation of the burner, such as the fire-off circuit 70, will pull down the voltage of the battery 30. In this way, the voltage when the gas stove is turned off can be detected by controlling other unignited ones to perform the fire-off action during the process of starting the ignition work of the gas stove, without affecting the working state of the burner that is starting the ignition work. After detecting the voltage when the gas stove is turned off, according to the voltage value of the battery 30 when the gas stove is turned off, it can be determined whether the power of the battery 30 can start the touch display screen to set the timed fire-off, anti-dry burning fire-off, remote fire-off and other gas stove automatic fire-off functions, as well as other intelligent functions, such as intelligent recipes. That is, whether the automatic fire-off mode needs to be disabled. In this way, even if the user needs to use this function, it will not be used during use because of the prohibition of use. Because the power is too low, the main controller 20 or the valve closing circuit cannot work normally and cannot respond to the valve closing action, which makes the automatic fire-off function invalid, so that the gas stove cannot be automatically turned off when it needs to be turned off, resulting in the gas stove being unable to be turned off in time during use.

[0058] Among them, controlling any one of the other unignited burners to perform the fire-off action for a first preset time is to detect the voltage of the battery 30 when the gas stove is turned off. The time can be set according to the time required for the detection of the battery voltage detection circuit 60. Within the first preset time, the battery voltage detection circuit 60 completes the detection of the battery 30 voltage.

[0059] The ignition control circuit of the present invention is provided with an ignition detection circuit 10, and the number of the ignition detection circuits 10 corresponds to the number of the burners of the gas stove, so as to detect the ignition state of the corresponding burners of the gas stove, and output a corresponding ignition detection signal to the main controller 20, so that when the main controller 20 determines that any one of the burners is in the ignition state according to the ignition detection signal, it controls any one of the remaining burners that are not ignited to be in the off state, and lasts for a first preset time, and obtains the voltage value of the gas stove battery 30 after controlling the remaining burners that are not ignited to be in the off state, and determines whether to disable the automatic off mode according to the obtained voltage value of the gas stove battery 30. The present invention can realize the voltage detection when the gas stove is turned off by controlling the execution of the off action of the burner that is not ignited without affecting the working state of the burner that is starting the ignition work. The present invention can ensure that the battery 30 is sufficiently charged before the user needs to start the touch display screen to set the gas stove's automatic shutdown functions such as timed shutdown, anti-dry burning shutdown, remote shutdown, and other intelligent functions, such as intelligent recipes, so that the intelligent functions of the gas stove can be used normally, thereby improving the safety and reliability of the gas stove.

[0060] Reference Figure 1 and Figure 2 In one embodiment, the main controller 20 is specifically configured to include:

[0061] Compare the acquired voltage value of the gas stove battery 30 with a preset voltage threshold;

[0062] When the detected voltage value of the gas stove battery 30 is less than or equal to the preset voltage threshold, the gas stove is controlled to enter the battery 30 low power mode and the automatic flameout mode is disabled;

[0063] When the detected voltage value of the gas stove battery 30 is greater than the preset voltage threshold, the automatic flameout mode is not disabled, and the flameout state control of the remaining unignited burners is released.

[0064] In this embodiment, the preset voltage threshold can be set according to the lowest voltage of the battery 30 when the gas stove can start working, or the preset voltage threshold can be a multiple of the rated voltage value of the battery 30, such as 0.7 times. When it is lower than the set voltage threshold, it is considered as low power. The voltage value when the gas stove can be turned off normally can be compared and judged according to the preset voltage threshold. When the voltage value of the battery 30 is less than or equal to the preset voltage threshold, it is determined that the voltage of the battery 30 is insufficient to support the automatic shutdown function. At this time, the gas stove is controlled to enter the low power mode of the battery 30 and the automatic shutdown function is prohibited. Among them, when entering the low power mode of the battery 30, some functional modules of the gas stove electric control board, such as functions related to automatic shutdown, such as wireless circuits, timers, touch screens, etc., can enter sleep mode to reduce the power consumption of the battery 30, and some functions, such as temperature detection circuits and voltage detection circuits, can also be stopped to reduce the power consumption of the battery 30 and ensure that some basic functions in the case of low power, such as sound and light alarm circuits, main controller 20, etc. can work normally. In some embodiments, the gas stove control circuit also includes: the low power reminder circuit can be implemented by a sound and light alarm circuit. When it is detected that the voltage value of the battery 30 is less than or equal to the preset voltage threshold, the main controller 20 generates a low-battery signal, and the low-battery reminder circuit sends out an audible and visual alarm signal, such as playing a corresponding low-battery voice reminder, or lighting up an LED light to provide a low-battery reminder.

[0065] Reference Figure 1 and Figure 2 In one embodiment, the gas stove control circuit further includes:

[0066] A battery voltage detection circuit 60, wherein the controlled end of the battery voltage detection circuit 60 is connected to the voltage control end of the main controller 20, the detection end of the battery voltage detection circuit 60 is connected to the battery 30, and the output end of the battery voltage detection circuit 60 is connected to the voltage feedback end of the main controller 20; wherein,

[0067] The battery voltage detection circuit 60 is used to start up upon receiving a voltage detection control signal from the main controller 20 to detect the voltage value of the gas stove battery 30 .

[0068] In this embodiment, the battery voltage detection circuit 60 is based on the control of the main controller 20, is turned on when working, detects the voltage of the battery 30, and outputs the corresponding voltage detection signal, and is turned off when not working, and does not detect the voltage of the battery 30. Specifically, when a high-level voltage detection control signal is received, the battery voltage detection circuit 60 is turned on to detect the voltage of the battery 30, and outputs the detected voltage detection signal to the main controller 20. When a low-level control signal is received, the battery voltage detection circuit 60 is turned off, and the voltage of the battery 30 is not detected at this time, and the main controller 20 will not obtain the voltage detection signal of the battery 30 voltage. In this way, the battery voltage detection circuit 60 can be turned off when not in use, and the battery voltage detection circuit 60 will not consume the power of the battery 30 when not in use, thereby reducing the power consumption of the battery voltage detection circuit 60 and the main controller 20 (the main controller 20 does not need to scan the feedback pin of the main controller 20 in real time to receive the voltage detection signal) for the battery 30. The present invention can detect the voltage of the battery 30 according to demand without detecting the voltage of the battery 30 in real time, which can effectively reduce the power consumption of the battery 30 by the battery voltage detection circuit 60 itself, thereby improving the battery life of the battery 30 and being more energy-saving and environmentally friendly.

[0069] Reference Figure 1 and Figure 2 In one embodiment, the gas stove control circuit further includes:

[0070] Micro switches (K1, K2), the micro switches (K1, K2) are arranged corresponding to the gas rotary valve of the gas stove, and the micro switches (K1, K2) are triggered to close when the gas rotary valve rotates;

[0071] Thermocouples (not shown) are provided corresponding to the burners of the gas stove;

[0072] The ignition detection circuit 10 is specifically used to output the ignition detection signal when it is detected that the micro switches (K1, K2) are closed and / or according to the electromotive force generated by the thermocouple.

[0073] In this embodiment, the number of micro switches (K1, K2) can be one or more. When the number of the micro switches (K1, K2) is more than one, the multiple micro switches (K1, K2) are connected to the ignition detection circuit 10 and the source start control circuit respectively. The micro switches (K1, K2) can correspond to the position setting of the gas rotary valve and are closed / opened based on the triggering of the gas rotary valve. For example, when the gas rotary valve is rotated to a preset position to realize the valve opening ignition, the micro switches (K1, K2) are triggered and closed. When the gas rotary valve is rotated to a zero-degree rotation angle position to be a valve closing state, and the valve closing is realized, the micro switches (K1, K2) are triggered and opened. By closing / opening the micro switches (K1, K2), it can be determined whether the gas stove is ignited / extinguished. Specifically, when it is determined that the gas stove is ignited, the micro switches (K1, K2) are closed, the trigger circuit controls the switch control circuit to open, and outputs an enable control signal to control the power conversion circuit 40 to work. When it is determined that the gas stove is not ignited, the micro switches (K1, K2) are disconnected, the trigger circuit does not work, the switch control circuit is not turned on, the enable control signal will not be output, the power conversion circuit 40 will not work, and the power conversion circuit 40 will not supply power to other circuit modules on the gas stove electric control board, thereby reducing the standby loss of the gas stove. When the micro switches (K1, K2) are set to multiple, when any burner is detected to be ignited, the corresponding micro switches (K1, K2) are closed, thereby controlling the power conversion circuit 40 to work, thereby supplying power to the main controller 20. When each burner is not ignited, the micro switches (K1, K2) are all in the disconnected state, and the power conversion circuit 40 does not work, which is conducive to reducing the standby loss of the gas stove.

[0074] Each micro switch (K1, K2) can also be connected to a pulse ignition generator and a solenoid valve suction valve control circuit respectively. The micro switches (K1, K2) can correspond to the position setting of the gas stove ignition switch (gas rotary valve), and are closed / opened based on the triggering of the gas rotary valve. For example, when the gas rotary valve is rotated to a preset position to realize the valve opening ignition, the micro switches (K1, K2) are triggered and closed, and when the gas rotary valve is rotated to a zero-degree rotation angle position to be a valve closing state, and the valve closing is realized, the micro switches (K1, K2) are triggered and opened. Through the closing / opening of the micro switches (K1, K2), it is possible to control whether the battery 30 supplies power to the pulse ignition generator and the solenoid valve suction valve control circuit. When the gas stove is not ignited, the micro switches (K1, K2) are disconnected, and the pulse ignition generator and the solenoid valve suction valve control circuit do not work, which is beneficial to reduce the standby loss of the gas stove.

[0075] The thermocouple includes a thermocouple probe arranged at the burner head and a thermocouple detection circuit integrated in the pulse igniter. Similarly, the electromotive force signal is obtained in real time, and the temperature of the burner head is sensed by the thermocouple detection circuit and the electromotive force signal is sent. The thermocouple can also realize accidental flameout detection together with the valve stem rotation angle detector. The valve stem rotation angle detector detects the rotation angle position of the valve stem of the gas rotary valve and sends a rotation angle position signal. When the rotation angle position signal is a non-zero rotation angle position signal, it indicates that the gas rotary valve is in an open valve state. When the electromotive force signal drops from a high level state greater than a predetermined threshold value (for example, 2mV) to a low level state lower than a lower predetermined threshold value, it indicates that the burner head is out of flame. At this time, it can be determined that the gas stove is accidentally out of flame.

[0076] The ignition detection circuit 10 can determine that the burner starts to ignite by detecting when the micro switches (K1, K2) are closed, or when the electromotive force of the thermocouple jumps from a low level state below a lower predetermined threshold to a high level state greater than an upper predetermined threshold.

[0077] Reference Figure 1 and Figure 2 In one embodiment, the gas stove control circuit further includes:

[0078] A power conversion circuit 40, wherein the input end of the power conversion circuit 40 is connected to the battery 30, and the power conversion circuit 40 is used to convert the electric energy of the battery 30 and output it;

[0079] The main controller 20 is further configured to operate when receiving power from the power conversion circuit 40 and output an enable control signal to control the power conversion circuit 40 to maintain power output.

[0080] In this embodiment, the power conversion circuit 40 can be implemented by using components such as a boost chip, an inductor and a filter capacitor. Among them, the input end of the boost chip is connected to the battery 30, and the output end of the boost chip is connected to the power end of the main controller 20; the enable end of the boost chip is respectively connected to the control end of the power startup control circuit 50 and the control end of the main controller 20; the switch end of the boost chip is connected to the battery 30 through an inductor. The boost chip is a power control chip. The boost chip can boost the voltage of the battery 30 to +3.3V. The boost chip is set with an enable control pin, and the chip works when a high-level enable control signal is received, and the chip does not work when a low-level enable control signal is received. Of course, in other embodiments, it can also be set to low-level enable, that is, the chip works when a low-level enable control signal is received, and the chip does not work when a high-level enable control signal is received, which is not limited here. The boost chip can receive the enable control signal output by the main controller 20 and the power startup control circuit 50. When the gas stove starts to ignite, it is controlled by the power startup control circuit 50 to work and supply power to the main controller 20 and other circuit modules. During the operation, it is controlled by the main controller 20 to work. At this time, whether the power startup control circuit 50 works or not will not affect the working state of the boost chip. When the gas stove is intelligently controlled or the user turns off the fire normally, the main controller 20 controls the boost chip to stop working. In this way, the consumption of the battery 30 voltage by the main controller 20 and other circuit modules when the gas stove is not working and is on standby can be reduced, which is conducive to improving the battery life of the battery 30.

[0081] Reference Figure 1 and Figure 2 In one embodiment, the gas stove control circuit further includes:

[0082] A power startup control circuit 50, wherein the control end of the power startup control circuit 50 is connected to the controlled end of the power conversion circuit 40; the power startup control circuit 50 is used to control the power conversion circuit 40 to work when the micro switches (K1, K2) are closed, so as to convert and output the electrical energy of the battery 30.

[0083] In this embodiment, the power startup control circuit 50 can receive the ignition detection signal of the gas stove (mainly triggered by the micro switch (K1, K2)), and the power startup control circuit 50 works when receiving the ignition detection signal, and remains in an inoperative state when not receiving the ignition detection signal. That is, the power startup control circuit 50 can obtain the working state of the gas stove when the gas stove starts to work, for example, it can determine whether the gas stove starts to work by knowing the rotation angle of the gas stove ignition switch (gas rotary valve). When it is determined that the gas stove starts to work, the power startup control circuit 50 outputs an enable control signal to the power conversion circuit 40, thereby controlling the power conversion circuit 40 to work, so as to convert and output the electric energy of the battery 30, and supply power to the main controller 20, the voice reminder circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, and the LED indication circuit, etc., to realize the intelligent control of the gas stove. When it is determined that the gas stove has not started working, the power start control circuit 50 will not output an enable control signal to the power conversion circuit 40, the power conversion circuit 40 will not work, and the output end of the power conversion circuit 40 will not output the converted electric energy. At this time, the main controller 20, the voice reminder circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, and the LED indication circuit are in a working state without a driving power supply. In this way, whether the power conversion circuit 40 starts working can be controlled according to whether the gas stove is working or not, so that when the gas stove is not working, the power conversion circuit 40 does not work, that is, it will not supply power to the main controller 20, the voice reminder circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, and the LED indication circuit, etc., which can reduce the standby loss of the gas stove.

[0084] Reference Figure 1 and Figure 2 In one embodiment, the gas stove control circuit further includes:

[0085] A flame-off circuit 70, the number of which corresponds to the number of the gas stove burners, and a controlled end of the flame-off circuit 70 is connected to the main controller 20;

[0086] The main controller 20 is also used to control the shutdown circuit 70 to operate and shut down the corresponding gas stove burner when receiving a shutdown trigger signal.

[0087] In this embodiment, the fire-off circuit 70 can be implemented by switches such as solenoid valves and mechanical switches, or by a combination of mechanical switches and solenoid valves. In a specific embodiment, a normally closed solenoid valve can be installed at the gas inlet of the gas stove. When the main controller 20 receives a fire-off trigger signal, the power supply circuit that controls the solenoid valve can stop supplying power to the solenoid valve, so that the valve core of the solenoid valve is reset under the action of the spring, and the valve body is closed to cut off the gas. Regardless of whether the gas stove is in working state before, the gas stove cannot work at this time. When it is necessary to intelligently control the fire, the main controller 20 can control the power supply circuit to provide power to the solenoid valve, so that the solenoid valve core is attracted by the electromagnet and the valve body is opened to achieve ventilation, and the gas stove can be turned on to work. Among them, the fire-off trigger signal can be a trigger signal such as timed fire-off, countdown fire-off, remote fire-off, and anti-dry burning fire-off, so that the intelligent control of the gas stove can be achieved. When the main controller 20 determines that a burner has started to ignite according to the ignition detection signal, it controls any burner among the other unignited burners to operate the corresponding flameout circuit 70, thereby executing the flameout action and realizing the voltage detection of the gas stove battery 30 when the flame is turned off.

[0088] Reference Figure 1 and Figure 2 In one embodiment, the main controller 20 is further configured to stop outputting an enable control signal when receiving a power-off trigger signal, so as to control the power conversion circuit 40 to stop outputting power.

[0089] It is understandable that in the smart gas stove, the gas stove can realize the timing function, the anti-dry burning function, the remote flame-off function, the gas leak detection function, etc. For example, in the gas leak detection function, it can be realized by a gas detector and a gas leak comparator. The gas detector monitors the concentration of leaked gas in the gas stove in real time and generates a corresponding detection signal according to the monitored leaked gas concentration value and sends it to the gas leak comparator. The gas leak comparator compares the detection signal with the reference threshold value, and generates a gas leak signal when the leaked gas concentration value is greater than the set concentration value. In the anti-dry burning function, it can be realized by an anti-dry burning sensor, which can be specifically set on the burner of the gas stove to detect the bottom temperature of the pot in real time and send a bottom temperature detection signal; the comparator receives the bottom temperature detection signal, and determines whether the corresponding bottom temperature of the pot reaches the dry burning temperature of the dry burning state according to the bottom temperature detection signal, and generates a dry burning signal when the dry burning state is reached. The timing function can be realized by a timer, and a timing trigger signal is output after the preset time is reached. The remote flame-off function can be realized by a wireless circuit module. When remote flame-off is required, the flame-off control signal output by the wireless circuit module can be used. The above-mentioned gas leakage signal, dry burning signal, timing trigger signal, flame-off control signal, etc. are power-off trigger signals. The main controller 20 can realize emergency automatic processing according to the power-off trigger signal, such as cutting off all gas valves. In the intelligent gas stove, a normal flame-off detection circuit can also be provided. Specifically, a valve stem rotation angle detector (such as a potentiometer) can be used to detect the rotation angle position of the valve stem of the gas rotary valve to trigger the closed position trigger signal (i.e., power-off trigger signal) at the zero rotation angle position. The main controller 20 can also detect that the combustion state of the stove is the flame-off state when the user turns off the fire normally. The main controller 20 can stop outputting the enable control signal to the power conversion circuit 40 according to the above-mentioned power-off trigger signal, and the power conversion circuit 40 stops supplying power to other circuit modules on the gas stove electric control board to reduce the standby loss of the gas stove.

[0090] Reference Figure 1 and Figure 2 In one embodiment, the gas stove control circuit further includes:

[0091] Temperature detection circuit 91;

[0092] Power switch control circuit 92;

[0093] The main controller 20 is also used to control the power switch control circuit 92 to turn on when receiving a temperature detection trigger signal, so as to provide a working voltage to the temperature detection circuit 91 and detect the temperature of the gas stove when it is working.

[0094] The temperature detection circuit 91 is used to detect the temperature of the burner head of the gas stove. The number of temperature detection circuits 91 can be one or more, and can be specifically set according to the number of gas stoves, that is, one temperature detection circuit 91 can be set for each gas stove. The temperature detection circuit 91 converts the detected temperature signal into a corresponding voltage signal, that is, a temperature detection signal, and outputs it to the main controller to detect the temperature of the burner head of the gas stove.

[0095] The main controller 20 can be intelligently controlled according to the needs of the gas stove, and when the corresponding function is realized, the temperature detection circuit 91 is selected to work. For example, the anti-dry burning function and the intelligent recipe function, in the anti-dry burning function, the detection probe of the temperature detection circuit 91 needs to be set on the burner of the gas stove to detect the temperature of the bottom of the pot in real time, and send a bottom of the pot temperature detection signal; the main controller 20 receives the bottom of the pot temperature detection signal, and determines whether the corresponding bottom of the pot temperature reaches the dry burning temperature of the dry burning state according to the bottom of the pot temperature detection signal, and when the dry burning state is reached, the main controller 20 outputs a corresponding control signal, such as an emergency fire-off control signal, an audible and visual alarm signal, etc. In the intelligent recipe, the user can use the mobile terminal (mobile phone, smart bracelet, smart watch, tablet computer) to pre-prepare the recipe and its standard operating procedure (set temperature, set time, etc. of each stage), and then send the corresponding control instruction to the gas stove through the mobile terminal, and the user selects the menu through the mobile terminal operation button, plays the standard operating procedure, and completes the cooking operation according to the prompt of the standard operating procedure. When the gas stove realizes the intelligent recipe function, it is necessary to detect the temperature of the bottom of the pot in real time through the temperature detection circuit 91 and send a bottom temperature detection signal. The main controller 20 compares the wok temperature with the current set temperature; if the wok temperature is greater than the current set temperature, the gas stove is controlled to reduce the air intake; if the wok temperature is less than the current set temperature, the gas stove is controlled to increase the air intake; if the wok temperature is equal to the current set temperature, the gas stove is controlled to maintain the current air intake.

[0096] The present invention also provides a gas stove control method, which is applied to a gas stove with a battery and multiple burners. Figure 3 , the gas stove control method comprises:

[0097] Step S100, detecting the ignition state of the corresponding gas stove burner and outputting a corresponding ignition detection signal;

[0098] In this embodiment, the gas stove is usually provided with a micro switch and a thermocouple, etc. The micro switch can correspond to the position setting of the gas stove ignition switch (gas rotary valve), and is closed / opened based on the triggering of the gas rotary valve. For example, when the gas rotary valve is rotated to a preset position to realize the valve opening ignition, the micro switch is triggered and closed, and when the gas rotary valve is rotated to a zero-degree rotation angle position to be a valve closing state, and the valve closing is realized, the micro switch is triggered and disconnected. The thermocouple includes a thermocouple probe arranged at the burner head and a thermocouple detection circuit integrated in the pulse igniter. Similarly, an electromotive force signal is obtained in real time, and the temperature of the burner head is sensed by the thermocouple detection circuit and an electromotive force signal is issued. By detecting when the micro switch is closed, or by jumping from a low level state below a lower predetermined threshold to a high level state greater than an upper predetermined threshold when the electromotive force of the thermocouple rises from a low level state below a lower predetermined threshold to a high level state greater than an upper predetermined threshold, it is determined that the burner head starts to ignite, and an ignition detection signal is output.

[0099] Step S200, when it is determined according to the ignition detection signal that any one of the plurality of burners is in an ignition state, controlling any one of the remaining unignited burners to be in an off state for a first preset time;

[0100] In this embodiment, when a burner in the gas stove starts to ignite, the ignition detection circuit can realize burner ignition detection through a trigger switch corresponding to the burner or other trigger mechanisms that can detect the ignition action of the burner. That is, in a gas stove with multiple burners, when the user starts to start one of them, the electric control board of the gas stove is powered on, and the corresponding ignition detection circuit outputs an ignition detection signal for the burner to start working when detecting that the burner is working. When the main controller determines that a burner has started to ignite according to the ignition detection signal, it controls any one of the other burners that have not been ignited to perform a fire-off action. When controlling other burners that have not been ignited to perform a fire-off action, the circuit module that controls the operation of the burner, such as the fire-off circuit, will pull down the battery voltage. In this way, the voltage when the gas stove is turned off can be detected by controlling other burners that have not been ignited to perform a fire-off action during the process of starting the ignition of the gas stove, without affecting the working state of the burner that is starting the ignition. After detecting the voltage when the gas stove is turned off, according to the battery voltage value when the gas stove is turned off, it can be determined whether the battery power can start the touch screen to set the timed shutdown, anti-dry burning shutdown, remote shutdown and other gas stove automatic shutdown functions, as well as other intelligent functions, such as intelligent recipes. That is, whether the automatic shutdown mode needs to be disabled. Among them, controlling any one of the other unignited burners to perform the shutdown action for a first preset time is the time to detect the battery voltage when the gas stove is turned off. This time can be set according to the time required for the battery voltage detection circuit to detect. Within the first preset time, the battery voltage detection circuit completes the detection of the battery voltage.

[0101] Step S300, after controlling the remaining unignited burners to be in the off state, obtaining the voltage value of the gas stove battery, and determining whether to disable the automatic off mode according to the obtained voltage value of the gas stove battery.

[0102] Specifically, the detected voltage value of the gas stove battery is compared with a preset voltage threshold;

[0103] When the detected voltage value of the gas stove battery is less than or equal to a preset voltage threshold, the gas stove is controlled to enter a low battery mode and the automatic flameout mode is disabled;

[0104] When the detected voltage value of the gas stove battery is greater than the preset voltage threshold, the automatic flameout mode is not disabled, and the flameout state control of the remaining unignited burners is released.

[0105] In this embodiment, the preset voltage threshold can be set according to the lowest voltage of the battery when the gas stove can start working, or the preset voltage threshold can be a multiple of the rated voltage value of the battery, such as 0.7 times. When it is lower than the set voltage threshold, it is regarded as low power. The voltage value when the gas stove can be turned off normally can be compared and judged according to the preset voltage threshold. When the voltage value of the battery is less than or equal to the preset voltage threshold, it is determined that the voltage of the battery is insufficient to support the automatic shutdown function. At this time, the gas stove is controlled to enter the low battery mode and the automatic shutdown function is prohibited. Among them, when entering the low battery mode, some functional modules of the gas stove electric control board, such as functions related to automatic shutdown, such as wireless circuits, timers, touch screens, etc., can enter sleep mode to reduce the power consumption of the battery. Some functions, such as temperature detection circuits and voltage detection circuits, can also be stopped to reduce the power consumption of the battery and ensure that some basic functions, such as sound and light alarm circuits and main controllers, can work normally in the case of low power. In some embodiments, when it is detected that the battery voltage value is less than or equal to a preset voltage threshold, the low battery reminder circuit can also be controlled to emit an audible and visual alarm signal, such as playing a corresponding low battery voice reminder, or lighting up an LED light to provide a low battery reminder.

[0106] The ignition control circuit of the present invention detects the ignition state of the corresponding gas stove burner and outputs the corresponding ignition detection signal, so that when any one of the multiple burners is determined to be in the ignition state according to the ignition detection signal, any one of the remaining burners that are not ignited is controlled to be in the off state and lasts for a first preset time, and after the remaining burners that are not ignited are controlled to be in the off state, the voltage value of the gas stove battery is obtained, and whether to disable the automatic off mode is determined according to the obtained voltage value of the gas stove battery. The present invention can realize the voltage detection when the gas stove is turned off by controlling the execution of the off action of the unignited burner without affecting the working state of the burner that is starting the ignition work. The present invention can ensure that the battery is sufficient before the user needs to start the touch display screen to set the timed off, the anti-dry burning off, the remote off and other gas stove automatic off functions, as well as other intelligent functions, such as intelligent recipes, so that the intelligent functions of the gas stove can be used normally, thereby improving the safety and reliability of the gas stove.

[0107] The present invention further provides a gas stove, comprising the gas stove control circuit as described above. The detailed structure of the gas stove control circuit can refer to the above embodiment, which will not be described in detail here; it can be understood that since the above gas stove control circuit is used in the gas stove of the present invention, the embodiment of the gas stove of the present invention includes all technical solutions of all embodiments of the above gas stove control circuit, and the technical effects achieved are also exactly the same, which will not be described in detail here.

[0108] The above descriptions are only optional embodiments of the present invention, and are not intended to limit the patent scope of the present invention. All equivalent structural changes made using the contents of the present invention's specification and drawings, or directly / indirectly applied in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A gas stove control circuit, applied to a gas stove with a battery and multiple burners, characterized in that: The gas stove control circuit comprises: Ignition detection circuits, the number of which corresponds to the number of gas stove burners; the ignition detection circuits are used to detect the ignition state of the corresponding gas stove burner and output a corresponding ignition detection signal; a main controller having an automatic shutoff mode for controlling the multiple burners to automatically shut off, and for controlling any one of the remaining unignited burners to be in a shutoff state for a first preset time when any one of the multiple burners is determined to be in an ignited state according to the ignition detection signal, and After controlling the remaining unignited burners to be in the off state, the voltage value of the gas stove battery is obtained, and it is determined whether to disable the automatic off mode according to the obtained voltage value of the gas stove battery.

2. The gas stove control circuit according to claim 1, characterized in that: The main controller is specifically used to include: Comparing the detected voltage value of the gas stove battery with a preset voltage threshold; When the detected voltage value of the gas stove battery is less than or equal to a preset voltage threshold, the gas stove is controlled to enter a low battery mode and the automatic flameout mode is disabled; When the detected voltage value of the gas stove battery is greater than the preset voltage threshold, the automatic flameout mode is not disabled, and the flameout state control of the remaining unignited burners is released.

3. The gas stove control circuit according to claim 1, characterized in that: The gas stove control circuit also includes: A voltage detection switch control circuit, wherein the controlled end of the voltage detection switch control circuit is connected to the voltage control end of the main controller, the detection end of the voltage detection switch control circuit is connected to the battery, and the output end of the voltage detection switch control circuit is connected to the voltage feedback end of the main controller; wherein, The voltage detection switch control circuit is used to turn on when receiving the voltage detection control signal from the main controller to detect the voltage value of the gas stove battery.

4. The gas stove control circuit according to claim 1, characterized in that: The gas stove control circuit also includes: A micro switch, wherein the micro switch is arranged corresponding to the gas rotary valve of the gas stove, and the micro switch is triggered to close when the gas rotary valve rotates; Thermocouples are provided corresponding to the burners of the gas stove; The ignition detection circuit is specifically used to output the ignition detection signal upon detecting that the micro switch is closed and / or according to the electromotive force generated by the thermocouple.

5. The gas stove control circuit according to claim 4, characterized in that: The gas stove control circuit also includes: A power conversion circuit, the input end of which is connected to the battery, and the power conversion circuit is used to convert the electric energy of the battery and then output it; The main controller is also used to operate when receiving electric energy from the power conversion circuit and output an enable control signal to control the power conversion circuit to maintain electric energy output.

6. The gas stove control circuit according to claim 5, characterized in that: The gas stove control circuit also includes: A power startup control circuit, wherein the control end of the power startup control circuit is connected to the controlled end of the power conversion circuit; the power startup control circuit is used to control the power conversion circuit to work when the micro switch is closed, so as to convert the electrical energy of the battery and output it.

7. The gas stove control circuit according to any one of claims 1 to 6, characterized in that: The gas stove control circuit also includes: A flame-off circuit, the number of which corresponds to the number of the gas stove burners, and a controlled end of the flame-off circuit is connected to the main controller; The main controller is also used to control the operation of the fire-off circuit and turn off the fire of the corresponding gas stove burner when receiving a fire-off trigger signal.

8. A gas stove, characterized in that: It comprises the gas stove control circuit as claimed in any one of claims 1 to 7.

9. A gas stove control method, applied to a gas stove with a battery and multiple burners, characterized in that: The gas stove control method comprises: Detect the ignition status of the corresponding gas stove burner and output the corresponding ignition detection signal; When it is determined according to the ignition detection signal that any one of the plurality of burners is in an ignition state, any one of the remaining burners that are not ignited is controlled to be in an off state for a first preset time, and After controlling the remaining unignited burners to be in the off state, the voltage value of the gas stove battery is obtained, and it is determined whether to disable the automatic off mode according to the obtained voltage value of the gas stove battery.

10. The gas stove control method according to claim 9, characterized in that: The step of determining whether to disable the automatic flameout mode according to the detected voltage value of the gas stove battery specifically includes: Comparing the detected voltage value of the gas stove battery with a preset voltage threshold; When the detected voltage value of the gas stove battery is less than or equal to a preset voltage threshold, the gas stove is controlled to enter a low battery mode and the automatic flameout mode is disabled; When the detected voltage value of the gas stove battery is greater than the preset voltage threshold, the automatic flameout mode is not disabled, and the flameout state control of the remaining unignited burners is released.

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