CN212511284U

CN212511284U - Gas stove control circuit and gas stove

Info

Publication number: CN212511284U
Application number: CN202021030313.9U
Authority: CN
Inventors: 李光明; 王文奇; 张琪
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Wuhu Midea Smart Kitchen Appliance Manufacturing Co Ltd
Priority date: 2020-06-05
Filing date: 2020-06-05
Publication date: 2021-02-09
Anticipated expiration: 2030-06-05

Abstract

The utility model discloses in gas-cooker control circuit and gas-cooker, this gas-cooker control circuit includes: the number of the ignition detection circuits corresponds to that of the gas stove burners; the ignition detection circuit is used for detecting the ignition state of the corresponding gas stove burner and outputting a corresponding ignition detection signal; the main controller is used for controlling any one of the rest un-ignited burners to be in a fire-off state and last for a first preset time when detecting that any one of the plurality of burners is in the ignition state, acquiring a voltage value of a gas stove battery after controlling the rest un-ignited burners to be in the fire-off state, and outputting a corresponding control signal according to the acquired voltage value of the gas stove battery; and the automatic fire-shutting circuit is used for controlling the plurality of furnace ends to automatically shut off fire according to the control signal of the main controller. The utility model provides the high security and the reliability of gas-cooker.

Description

Gas stove control circuit and gas stove

Technical Field

The utility model relates to a kitchen appliance technical field, in particular to gas-cooker control circuit and gas-cooker.

Background

The development of gas cookers increasingly attaches importance to the problem of safety, and in the intelligent control application of gas cookers, the function of fire shutoff controlled by a circuit is applied more and more, for example, a touch display screen is provided with the automatic fire shutoff functions of the gas cookers, such as timing fire shutoff, dry burning prevention fire shutoff, remote fire shutoff and the like. In the process of shutting down the fire, it is necessary to ensure that the battery has sufficient electric quantity, and if the battery voltage is too low, the danger that the fire cannot be shut down smoothly may be caused.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a gas-cooker control circuit and gas-cooker aims at improving the security and the reliability of gas-cooker.

In order to achieve the above object, the utility model provides a gas stove control circuit is applied to in the gas-cooker that has battery and a plurality of furnace ends, gas-cooker control circuit includes:

the number of the ignition detection circuits corresponds to that of the gas stove burners; the ignition detection circuit is used for detecting the ignition state of the corresponding gas stove burner and outputting a corresponding ignition detection signal;

the main controller is used for controlling any one of the rest un-ignited furnace ends to be in a fire-off state and last for a first preset time when detecting that any one of the furnace ends is in the ignition state, and

the method comprises the steps of obtaining a voltage value of a gas stove battery after controlling other unfired furnace ends to be in a fire-off state, and outputting a corresponding control signal according to the obtained voltage value of the gas stove battery;

and the automatic fire-shutting circuit is used for controlling the plurality of furnace ends to automatically shut off fire according to the control signal of the main controller.

Optionally, the gas stove control circuit further comprises:

the controlled end of the voltage detection switch control circuit is connected with the voltage control end of the main controller, the detection end of the voltage detection switch control circuit is connected with the battery, and the output end of the voltage detection switch control circuit is connected with the voltage feedback end of the main controller; wherein the content of the first and second substances,

and the voltage detection switch control circuit is used for starting when receiving a voltage detection control signal of the main controller so as to detect the voltage value of the gas stove battery.

Optionally, the gas stove control circuit further comprises:

the microswitch is arranged corresponding to a gas rotary valve of the gas stove and is triggered to be closed when the gas rotary valve rotates;

and the thermocouples are arranged corresponding to the furnace ends of the gas stove.

Optionally, the ignition detection circuit is specifically configured to output the ignition detection signal when the micro switch is detected to be closed and/or according to the electromotive force generated by the thermocouple.

Optionally, the gas stove control circuit further comprises:

the input end of the power conversion circuit is connected with the battery, and the power conversion circuit is used for converting the electric energy of the battery and then outputting the electric energy;

the main controller is further configured to operate when receiving the electric energy of the power conversion circuit, and output an enable control signal to control the power conversion circuit to maintain the electric energy output.

Optionally, the gas stove control circuit further comprises:

the control end of the power supply starting control circuit is connected with the controlled end of the power supply conversion circuit; and the power supply starting control circuit is used for controlling the power supply conversion circuit to work when receiving an ignition trigger signal so as to convert the electric energy of the battery and then output the converted electric energy.

Optionally, the gas stove control circuit further comprises:

a temperature detection circuit;

a power switch control circuit;

and the main controller is also used for controlling the power switch control circuit to be started when receiving the temperature detection trigger signal so as to provide working voltage for the temperature detection circuit and detect the temperature of the gas stove during working.

Optionally, the main controller is further configured to stop outputting the enable control signal when receiving the power down trigger signal, so as to control the power conversion circuit to stop outputting the electric power.

Optionally, the gas stove control circuit further comprises:

the number of the fire-stopping circuits corresponds to that of the gas stove burners, and the controlled ends of the fire-stopping circuits are connected with the main controller;

and the main controller is also used for controlling the fire-stopping circuit to work and stopping the fire of the corresponding gas stove burner after receiving the fire-stopping trigger signal.

The utility model discloses still provide a gas-cooker, include as above gas-cooker control circuit.

The utility model discloses ignition control circuit is through setting up ignition detection circuitry, and the quantity of ignition detection circuitry corresponds with the quantity of gas stove furnace end to detect the ignition state that corresponds the gas stove furnace end, and output the ignition detection signal that corresponds to main control unit, so that main control unit is in according to the ignition detection signal, it is certain a plurality of when arbitrary one furnace end in the furnace end is in the ignition state, control arbitrary one furnace end in all the other furnace ends that do not ignite and be in the state of turning off the fire, and last first preset time, and the furnace end that do not ignite all the other control is in the voltage value who turns off the fire state after acquireing the gas stove battery, and confirm whether forbidden according to the voltage value of the gas stove battery 30 who acquires automatically turn off the fire mode. The utility model discloses can be under the operating condition's that does not influence the furnace end that starts the ignition work, turn off the fire action through the execution that control is not igniteed, voltage detection when realizing that the gas-cooker closes the fire. The utility model discloses can set up at user's needs and regularly close the fire, prevent dry combustion method and close the fire, the automatic function of closing the fire of gas-cooker such as long-range fire of closing to and other intelligent function, for example before the intelligent menu, guarantee that battery power is sufficient to make the intelligent function of gas-cooker can normal use, thereby improve the security and the reliability of gas-cooker.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic circuit diagram of a gas stove control circuit according to an embodiment of the present invention;

fig. 2 is a schematic circuit diagram of another embodiment of the gas stove control circuit of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The utility model provides a gas-cooker control circuit is applied to in the gas-cooker that has battery and a plurality of furnace ends.

Referring to fig. 1 and 2, in an embodiment of the present invention, the gas stove control circuit includes:

the number of the ignition detection circuits 10 corresponds to that of the gas stove burners; the ignition detection circuit is used for detecting the ignition state of the corresponding gas stove burner and outputting a corresponding ignition detection signal;

a main controller 20, configured to control any one of the rest un-ignited burners to be in a fire-off state and last for a first preset time when detecting that any one of the plurality of burners is in an ignition state, and

and an automatic fire-shutting circuit 80 for controlling the plurality of burners to shut off fire automatically according to the control signal of the main controller 20.

In this embodiment, the ignition detection circuit 10 is configured to detect an ignition state of a gas stove burner, and the number of the temperature detection circuits 91 may be two or more, and specifically may be set according to the number of the gas stoves, that is, one ignition detection circuit 10 may be set corresponding to each gas stove. The ignition detection circuit 10 converts the detected ignition state signal of the gas stove into a corresponding voltage signal, i.e. an ignition detection signal, and outputs the voltage signal to the main controller 20, so as to detect the ignition state of the gas stove burner.

The main controller 20 may be implemented by a single chip, a DSP, an FPGA, and other microprocessors, and those skilled in the art can implement the detection of the temperature of the gas cooker by integrating some hardware circuits and software programs or algorithms in the main controller 20, for example, hardware circuits such as a memory, an ADC conversion circuit, and a filter are integrated, or a software algorithm program for analyzing and comparing the received ignition detection signal is integrated. The main controller 20 can execute various functions and process data of the gas stove by operating 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 ignition detection signal converted into the digital signal is compared, analyzed and the like by the software algorithm program and/or the hardware circuit module integrated in the main controller 20 to determine whether the current gas stove burner performs an ignition action, and outputs a corresponding control signal according to the current ignition detection signal of the gas stove burner, and the main controller 20 can also execute the software program and/or module stored in the memory of the main controller 20 and call the data stored in the memory to execute various functions and process data of the gas stove, thereby performing overall monitoring on the gas stove, the intelligent control to the gas stove is realized.

In this embodiment, the gas stove control circuit further includes a battery 30, the battery 30 may be an alkaline battery 30 or a carbon battery 30, the battery 30 is disposed in the gas stove, and particularly may be disposed in the knob body of the knob, the battery 30 may be detachably disposed in a predetermined space in the knob body, or the battery 30 may also be integrated in the knob body to be integrated with the knob body. The battery 30 is used for providing electric energy to each functional module on the electric control board of the gas stove, and the battery 30 can be implemented by a primary battery 30 such as a dry battery 30, and can also be a rechargeable battery 30 capable of implementing secondary charging. Specifically, the battery 30 may be a rechargeable battery 30 such as a nickel metal hydride (NiMH) battery 30, a lithium ion (Li-ion) battery 30, or the like. The electric control board of the gas stove can be further provided with a voice reminding circuit, a wireless circuit, a temperature detection sensor, a gas detection sensor, an LED indicating circuit and the like, and the battery 30 is electrically connected with the electric control board, so that when the gas stove works, the circuit module is powered on, and the intelligent control of the gas stove is realized.

The gas stove control circuit further comprises a power conversion circuit 40, wherein the power conversion circuit 40 can convert the power output after the electric energy of the battery 30 is subjected to voltage reduction, filtering and the like into power supply voltage of each circuit module, so as to supply power to the circuit modules arranged on the gas stove electric plate, such as a voice reminding circuit, a wireless circuit, a temperature detection sensor, a gas detection sensor, an LED indicating circuit and the like. The power conversion circuit 40 can also manage and distribute power supplies for each load in the gas cooker.

The working power supply of the main controller 20 is provided by the power conversion circuit 40, and the main controller 20 outputs an enabling control signal for the power conversion circuit 40 after being electrified to control the power conversion circuit 40 to work so as to output the electric energy of the battery 30 after being converted, and the power supply of the main controller 20, the voice reminding circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, the LED indicating circuit and the like can be realized, thereby realizing the intelligent control of the gas stove. After the main controller 20 is powered on and operated, the power conversion circuit 40 is controlled by the main controller 20, and whether the power supply startup control circuit 50 is operated or not is not affected by the operation of the power conversion circuit 40. For example, in a gas stove with two or more burners, when a user turns on one of the burners, the power-on control circuit 50 may be triggered to operate, and after a certain period of time, the burner is turned off, and when the other burners are turned on, the power conversion circuit 40 will not be affected by the turning off of the burner.

It can be understood that there is a difference between the no-load voltage and the loaded voltage according to the load characteristics of the battery 30. The load voltage varies with different loads, the greater the load current, the more the actual amount of discharge charge of the battery 30 decays, the lower the output voltage of the battery 30, and the lower the output voltage of the battery 30 will be when the battery 30 is running low. In addition, the battery 30 used in the gas stove is different according to the brand and model (the alkaline battery 30 is different from the carbon battery 30), the voltage difference between the no-load voltage and the voltage difference with the same load is different, and the load current of the battery 30 is larger when the fire is shut off than under other working conditions. However, the voltage of the battery 30 at the time of ignition is detected to determine whether the ignition-off voltage is satisfied, and the voltage at the time of ignition may be different from the voltage of the battery 30 at the time of ignition, so that the voltage at the time of ignition cannot be accurately determined, and thus there is a certain risk in the process of gas stove being used. Thus, it is necessary to set the low voltage threshold to a high margin to ensure that the battery 30 is suitable for various types of batteries 30 even when the battery 30 is at a low voltage.

In the intelligent control application of the gas stove, the function of fire shutoff controlled by a circuit is more and more applied, for example, the touch display screen is provided with the automatic fire shutoff functions of the gas stove, such as timing fire shutoff, dry burning prevention fire shutoff, remote fire shutoff and the like. When the automatic fire-off function is to be realized, the main controller 20 can control the automatic fire-off circuit 80 to work so as to realize the automatic fire-off, and a timer, a temperature sensor and the like can be integrated in the automatic fire-off circuit 80, so that the automatic fire-off functions such as timing fire-off, dry-burning-resistant fire-off, remote fire-off and the like can be realized according to the control signal output by the main controller 20. In the process of automatic fire shutoff, it is necessary to ensure that the battery 30 has sufficient electric power, and if the voltage of the battery 30 is too low, the fire may not be shut off smoothly.

In order to solve the above problem, in this embodiment, the ignition detection circuit 10 and the main controller 20 both operate based on the electric energy provided by the power conversion circuit 40, and when one burner of the gas stove starts to ignite, the ignition detection circuit 10 may implement burner ignition detection through a trigger switch corresponding to the burner or other trigger mechanisms capable of detecting the ignition action of the burner. That is, in the gas stove provided with a plurality of burner, when a user starts one of the burners, the electric control board of the gas stove is powered on to operate, and the corresponding ignition detection circuit 10 outputs an ignition detection signal when detecting that the burner operates. When it is determined that one burner starts to ignite according to the ignition detection signal, the main controller 20 controls any one burner among other unfired burners to perform a fire-off operation. When other unfired burners are controlled to perform the fire-off operation, the circuit module controlling the operation of the burner, for example, the fire-off circuit 70, will pull down the voltage of the battery 30. Therefore, the voltage of the gas stove during the fire-off process can be detected by controlling other non-ignited fire-off executing actions in the process of starting the ignition operation of the gas stove, and the working state of the burner starting the ignition operation can not be influenced. After the voltage of the gas stove during fire cut-off is detected, according to the voltage value of the battery 30 during fire cut-off of the gas stove, whether the electric quantity of the battery 30 can start the touch display screen to set the automatic fire cut-off functions of the gas stove, such as timed fire cut-off, dry burning prevention fire cut-off, remote fire cut-off and the like, and other intelligent functions, such as intelligent recipes and the like, can be determined. I.e., whether the auto-shut off mode needs to be disabled. Therefore, even if a user needs to use the function, the use is forbidden, the main controller 20 or the valve closing circuit cannot work normally due to too low electric quantity in the using process, the valve closing action cannot be responded, the automatic fire closing function fails, the gas stove cannot automatically close fire when the fire needs to be closed, and the fire cannot be closed in time in the using process of the gas stove.

The method includes the steps that any one of other unfired burners is controlled to perform a fire closing action for a first preset time, in order to detect the time of the voltage of the battery 30 in the fire closing state of the gas stove, the time can be set according to the time required by the detection of the voltage detection circuit of the battery 30, and in the first preset time, the voltage detection circuit of the battery 30 finishes the detection of the voltage of the battery 30.

The utility model discloses ignition control circuit is through setting up ignition detection circuitry 10, and the quantity of ignition detection circuitry 10 corresponds with the quantity of gas stove furnace end to detect the ignition state that corresponds the gas stove furnace end, and output the ignition detection signal that corresponds to main control unit 20, so that main control unit 20 is in the basis ignition detection signal, it is definite a plurality of when arbitrary one furnace end in the furnace end is in the ignition state, control arbitrary one furnace end in all the other furnace ends that do not ignite and be in and close the fire state, and last first preset time, and the furnace end that do not ignite all the other control is in and closes the voltage value that obtains gas stove battery 30 after the fire state, and confirm whether forbid according to the voltage value of the gas stove battery 30 who obtains automatically close the fire mode. The utility model discloses can be under the operating condition's that does not influence the furnace end that starts the ignition work, turn off the fire action through the execution that control is not igniteed, voltage detection when realizing that the gas-cooker closes the fire. The utility model discloses can set up at user's needs and regularly close the fire, prevent dry combustion method and close the fire, the automatic function of closing the fire of gas-cooker such as long-range fire of closing to and other intelligent function, for example before the intelligence menu, guarantee that battery 30 electric quantity is sufficient to the intelligent function that makes the gas-cooker can normal use, thereby improves the security and the reliability of gas-cooker.

Referring to fig. 1 and 2, in an embodiment, the main controller 20 is specifically configured to include:

comparing the acquired voltage value of the gas stove battery 30 with a preset voltage threshold value;

when the detected voltage value of the gas stove battery 30 is smaller than or equal to a preset voltage threshold value, controlling the gas stove to enter a low-power mode of the battery 30, and forbidding the automatic fire-off mode;

and when the detected voltage value of the gas stove battery 30 is greater than the preset voltage threshold value, the automatic fire-off mode is not disabled, and the control that the rest un-ignited furnace ends are in the fire-off state is released.

In this embodiment, the preset voltage threshold may be set according to the lowest voltage of the battery 30 when the gas stove can be started, or the preset voltage threshold may be a multiple of the rated voltage value of the battery 30, for example, 0.7 times, and when the preset voltage threshold is lower than the preset voltage threshold, the preset voltage threshold is regarded as a low power. And if the gas stove can be normally shut down, comparing and judging according to the preset voltage threshold. When the voltage value of the battery 30 is smaller than or equal to the preset voltage threshold value, it is determined that the voltage of the battery 30 is not enough to support the automatic fire-off function, and at this time, the gas stove is controlled to enter a low-power mode of the battery 30, and the automatic fire-off function is forbidden. When the battery 30 is in the low-power mode, some functional modules of the gas stove electronic control board, such as functions related to automatic fire shutoff, for example, a wireless circuit, a timer, a touch screen and the like, can enter a sleep mode, so that the power consumption of the battery 30 is reduced, and some functions, such as the temperature detection circuit 91 and the voltage detection circuit, can also be stopped to reduce the power consumption of the battery 30, so that some basic functions under the low-power condition, such as an audible and visual alarm circuit and the main controller 20, can work normally. In some embodiments, the gas range control circuit further comprises: the low-power reminding circuit can be realized by adopting an audible and visual alarm circuit. When the voltage value of the battery 30 is detected to be less than or equal to the preset voltage threshold, the main controller 20 generates a low power signal, and the low power reminding circuit sends an audible and visual alarm signal, for example, plays a corresponding low power voice reminder, or carries out a low power reminder by lighting an LED lamp.

Referring to fig. 1 and 2, in an embodiment, the gas stove control circuit further includes:

a battery voltage detection circuit 60, a controlled end of the battery voltage detection circuit 60 being connected to a voltage control end of the main controller 20, a detection end of the battery voltage detection circuit 60 being connected to the battery 30, and an output end of the battery voltage detection circuit 60 being connected to a voltage feedback end of the main controller 20; wherein the content of the first and second substances,

the battery voltage detection circuit 60 is configured to be turned on when receiving a voltage detection control signal from the main controller 20 to detect a voltage value of the gas range battery 30.

In this embodiment, the battery voltage detection circuit 60 is controlled by the main controller 20, and is turned on when operating, detects the voltage of the battery 30, outputs a corresponding voltage detection signal, and is turned off when not operating, without detecting the voltage of the battery 30. Specifically, upon receiving the voltage detection control signal of the high level, the battery voltage detection circuit 60 is turned on to detect the voltage of the battery 30 and output the detected voltage detection signal to the main controller 20. When receiving the low-level control signal, the battery voltage detection circuit 60 is turned off, and at this time, the voltage of the battery 30 is not detected, and the main controller 20 does not acquire the voltage detection signal of the voltage of the battery 30. Thus, when not in use, the battery voltage detection circuit 60 can be turned off, and when not in use, the battery voltage detection circuit 60 does not consume the electric energy of the battery 30, so that 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) to the battery 30 can be reduced. The utility model discloses can detect battery 30 voltage according to the demand, and need not the voltage of real-time detection battery 30, can effectual reduction battery 30 voltage detection circuit self to the consumption of battery 30 to improve battery 30's duration, it is more energy-concerving and environment-protective.

the gas stove comprises micro switches (K1, K2), wherein the micro switches (K1, K2) are arranged corresponding to a gas rotary valve of the gas stove, and the micro switches (K1, K2) are triggered to be closed when the gas rotary valve rotates;

a thermocouple (not shown) provided corresponding to each of the burner of the gas range;

the ignition detection circuit 10 is specifically configured to output the ignition detection signal upon detection of the micro switch (K1, K2) being closed and/or in accordance with the electromotive force generated by the thermocouple.

In this embodiment, the number of the micro switches (K1, K2) may be one or more, and when the number of the micro switches (K1, K2) is plural, the plural 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 be set corresponding to the position 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 achieve valve-opening ignition, the micro switches (K1, K2) are triggered to be closed, when the gas rotary valve is rotated to a zero-degree rotation angle position to be in a valve-closing state, and when the gas rotary valve is achieved to be closed, the micro switches (K1, K2) are triggered to be opened. Whether the gas stove is ignited or not can be determined by the on/off of the micro switches (K1, K2). Specifically, when the ignition operation of the gas stove is determined, the micro switches (K1, K2) are closed, the trigger circuit controls the switch control circuit to be opened, and the enable control signal is output to control the power supply conversion circuit 40 to operate. When the gas stove is determined not to be ignited to work, the micro switches (K1 and K2) are switched off, the trigger circuit does not work, the switch control circuit is not switched on and does not output an enabling control signal, the power conversion circuit 40 does not work, and the power conversion circuit 40 does not supply power to other circuit modules on the electric control board of the gas stove, so that the standby loss of the gas stove can be reduced. When micro-gap switch (K1, K2) set up to a plurality of, when detecting arbitrary furnace end ignition work, corresponding micro-gap switch (K1, K2) are closed to control power supply converting circuit 40 work, thereby for main controller 20 power supply, when each furnace end did not ignite, micro-gap switch (K1, K2) all were in the off-state, power supply converting circuit 40 was out of work, was favorable to reducing the standby loss of gas-cooker.

Each micro switch (K1, K2) can also be respectively connected with a pulse ignition generator and a solenoid valve suction valve control circuit. The micro switches (K1, K2) can be set corresponding to the position of a gas stove ignition switch (a gas rotary valve) and are switched on/off based on the triggering of the gas rotary valve. For example, when the gas rotary valve is rotated to a preset position to achieve valve-opening ignition, the micro switches (K1, K2) are triggered to be closed, when the gas rotary valve is rotated to a zero-degree rotation angle position to be in a valve-closing state, and when the gas rotary valve is achieved to be closed, the micro switches (K1, K2) are triggered to be opened. The on/off of the micro switches (K1, K2) can control whether the battery 30 supplies power to the pulse ignition generator and the solenoid valve suction valve control circuit or not. When the gas stove is not ignited to work, the micro switches (K1 and K2) are switched off, and the pulse ignition generator and the electromagnetic valve suction valve control circuit do not work, so that the standby loss of the gas stove is reduced.

The thermocouple comprises a thermocouple probe arranged at the furnace end and a thermocouple detection circuit integrated in the pulse igniter. And similarly, acquiring an electromotive force signal in real time, sensing the temperature of the furnace end through a thermocouple detection circuit and sending out the electromotive force signal. The thermocouple can also realize accidental flameout detection together with a valve rod rotation angle detector, the valve rod rotation angle detector detects the rotation angle position of a valve rod 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, the gas rotary valve is indicated to be in a valve opening state, when an electromotive force signal is reduced from a high level state larger than a preset threshold value (for example, 2mV) to a low level state lower than a lower preset threshold value, the furnace end is indicated to be flameout, and at the moment, the accidental flameout of the gas stove can be determined.

The ignition detection circuit 10 may determine that the burner starts ignition by detecting that the micro switches (K1, K2) are closed, or by determining that the burner starts ignition when the electromotive force of the thermocouple is stepped from a low state lower than a lower predetermined threshold to a high state larger than an upper predetermined threshold.

the input end of the power conversion circuit 40 is connected with the battery 30, and the power conversion circuit 40 is used for converting the electric energy of the battery 30 and then outputting the electric energy;

the main controller 20 is further configured to operate when receiving the power of the power conversion circuit 40, and output an enable control signal to control the power conversion circuit 40 to maintain power output.

In this embodiment, the power conversion circuit 40 may be implemented by using components such as a boost chip, an inductor, and a filter capacitor. The input end of the boost chip is connected with the battery 30, and the output end of the boost chip is connected with the power supply end of the main controller 20; the enable end of the boost chip is connected to the control end of the power supply start control circuit 50 and the control end of the main controller 20 respectively; 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 may boost the battery 30 voltage to + 3.3V. The boost chip is provided with an enable control pin, the chip works when receiving a high-level enable control signal, and the chip does not work when receiving a low-level enable control signal. Of course, in other embodiments, the enable may also be set to be low-level enable, that is, the chip operates when the enable control signal of low level is received, and the chip does not operate when the enable control signal of high level is received, which is not limited herein. The chip that steps up can receive the enable control signal of main control unit 20 and the output of power start control circuit 50, when the gas-cooker began to ignite the work, by power start control circuit 50 control and work, and give main control unit 20 and other circuit module power supplies, at the in-process of work, then by main control unit 20 control and work, whether power start control circuit 50 works this moment can not influence the operating condition of chip that steps up, carry out intelligent control to the gas-cooker, or when the user normally closes the fire, main control unit 20 control chip that steps up stop work. Therefore, the consumption of the voltage of the battery 30 by the circuit modules such as the main controller 20 when the gas stove is not in operation and is in standby can be reduced, and the endurance of the battery 30 can be improved.

a power supply start control circuit 50, wherein a control end of the power supply start control circuit 50 is connected with a controlled end of the power supply conversion circuit 40; the power supply start control circuit 50 is configured to control the power supply conversion circuit 40 to operate when the micro switches (K1, K2) are closed, so as to convert the electric energy of the battery 30 and output the converted electric energy.

In this embodiment, the power start control circuit 50 may receive an ignition detection signal (mainly triggered by the micro switches (K1, K2)) of the gas stove, and the power start control circuit 50 operates when receiving the ignition detection signal, and maintains an off state when not receiving the ignition detection signal. That is, the power start control circuit 50 can know the working state of the gas stove when the gas stove starts to work, for example, it can be determined whether the gas stove starts to work by knowing the rotation angle of the ignition switch (gas rotary valve) of the gas stove, when it is determined that the gas stove starts to work, the power start control circuit 50 outputs an enable control signal to the power conversion circuit 40, so as to control 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 reminding circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, the LED indicating circuit and the like, thereby realizing the intelligent control of the gas stove. When the gas stove is determined not to start working, the power supply start control circuit 50 does not output an enable control signal to the power supply conversion circuit 40, the power supply conversion circuit 40 does not work, the output end of the power supply conversion circuit 40 does not output converted electric energy, and at the moment, the main controller 20, the voice reminding circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor and the LED indicating circuit are in a working state without driving a power supply. Therefore, whether the power conversion circuit 40 is started or not can be controlled according to whether the gas stove works or not, so that the power conversion circuit 40 does not work under the condition that the gas stove does not work, namely, the power is not supplied to the main controller 20, the voice reminding circuit, the wireless circuit, the temperature detection sensor, the gas detection sensor, the LED indicating circuit and the like, and the standby loss of the gas stove can be reduced.

the number of the fire-stopping circuits 70 corresponds to that of the gas stove burner, and the controlled end of the fire-stopping circuit 70 is connected with the main controller 20;

the main controller 20 is further configured to control the fire-stopping circuit 70 to operate when receiving a fire-stopping trigger signal, and stop the fire of the corresponding gas stove burner.

In this embodiment, the fire-cut-off circuit 70 may be implemented by using a switch such as a solenoid valve, a mechanical switch, or a combination of a mechanical switch and a solenoid valve. In a specific embodiment, a normally closed electromagnetic valve may be installed at the gas inlet of the gas stove, and when the main controller 20 receives a fire-off trigger signal, the power circuit for controlling the electromagnetic valve to supply power stops to be common to the electromagnetic valve, so that the valve core of the electromagnetic valve is reset under the action of the spring, the valve body is closed to realize gas cut-off, and the gas stove cannot work at this time regardless of whether the gas stove is in a working state before. When the intelligent control ignition is needed, the main controller 20 can control the power circuit to provide power for the electromagnetic valve, so that the valve core of the electromagnetic valve is attracted by the electromagnet to open the valve body to realize ventilation, and the gas stove can be opened to work. The fire-off trigger signal can be trigger signals such as timing fire-off, countdown fire-off, remote fire-off, dry-burning-prevention fire-off and the like, so that the intelligent control of the gas stove can be realized. When the main controller 20 determines that one burner starts to ignite according to the ignition detection signal, it controls any burner among other unfired burners and the corresponding fire-off circuit 70 to operate, so as to execute a fire-off operation, thereby detecting the voltage of the gas stove battery 30 during the fire-off operation.

Referring to fig. 1 and 2, in an embodiment, the main controller 20 is further configured to stop outputting the enable control signal when receiving the power down trigger signal, so as to control the power conversion circuit 40 to stop outputting the power.

It can be understood that, in intelligent gas-cooker, the gas-cooker can realize timing function, prevent dry combustion method function, long-range shut off the fire function, gas leak testing function etc. for example in gas leak testing function, can realize through gas detector, gas leak comparator, gas detector real-time supervision gas-cooker in leak gas concentration and according to the detection signal that monitoring leaks gas concentration value generation corresponds and send to the gas leak comparator, the gas leaks the comparator, compare detected signal and benchmark threshold value, when leaking the gas concentration value and being greater than the settlement concentration value, generate the gas and leak the signal. In the anti-dry heating function, the anti-dry heating function can be realized through an anti-dry heating sensor, and the anti-dry heating sensor can be specifically arranged at a burner of a gas stove to detect the temperature of the pot bottom in real time and send a pot bottom temperature detection signal; the comparator receives the pot bottom temperature detection signal, judges whether the corresponding pot bottom temperature reaches the dry-burning temperature of the dry-burning state according to the pot bottom temperature detection signal, and generates a dry-burning signal when the pot bottom temperature reaches the dry-burning state. The timing function can be realized by adopting a timer, and a timing trigger signal is output after the preset time is reached. The remote fire-extinguishing function can be realized through the wireless circuit module, and when remote fire-extinguishing is needed, fire-extinguishing control signals output by the wireless circuit module can be used. The gas leakage signal, the dry combustion signal, the timing trigger signal, the fire shutoff control signal, and the like are power-down trigger signals, and the main controller 20 can implement emergency automatic processing, such as cutting off all gas valves, according to the power-down trigger signals. In intelligent gas-cooker, can also be provided with normally and shut off fire detection circuitry, specifically can adopt valve rod rotation angle detector (like the potentiometre), detect the rotation angle position of the valve rod of gas rotary valve to trigger when zero degree rotation angle position and close the trigger signal that targets in place (also fall the electrical trigger signal), main controller 20 can also be when the user normally shuts off the fire, detect the cooking utensils combustion state and be flame-out state. The main controller 20 may stop outputting the enable control signal to the power conversion circuit 40 according to the power-down trigger signal, and the power conversion circuit 40 stops supplying power to other circuit modules on the electric control board of the gas stove, so as to reduce standby loss of the gas stove.

a temperature detection circuit 91;

a power switch control circuit 92;

the main controller 20 is further configured to control the power switch control circuit 92 to be turned on when receiving the temperature detection trigger signal, so as to provide a working voltage for the temperature detection circuit 91, and detect the temperature of the gas stove during operation.

The temperature detection circuits 91 are used for detecting the temperature of the gas stove burner, the number of the temperature detection circuits 91 may be one or multiple, and the temperature detection circuits 91 may be specifically set according to the number of the gas stoves, that is, one temperature detection circuit 91 may be set corresponding to each gas stove. The temperature detection circuit 91 converts the detected temperature signal into a corresponding voltage signal, namely a temperature detection signal, and outputs the voltage signal to the main controller to realize the detection of the temperature of the burner of the gas stove.

The main controller 20 can be intelligently controlled according to the requirements of the gas stove, and when the corresponding function is realized, the temperature detection circuit 91 is selectively controlled to work. For example, the anti-dry heating function, in which a detection probe of the temperature detection circuit 91 is required to be disposed at a burner of a gas stove to detect the temperature of the pot bottom in real time and send a pot bottom temperature detection signal, an intelligent recipe function; the main controller 20 receives the pot bottom temperature detection signal, judges whether the corresponding pot bottom temperature reaches the dry-burning temperature of the dry-burning state according to the pot bottom temperature detection signal, and when the pot bottom temperature reaches the dry-burning state, the main controller 20 outputs a corresponding control signal, such as an emergency fire-off control signal, an audible and visual alarm signal, and the like. In the intelligent menu, a user can pre-make a menu and standard operation programs (set temperature, set time and the like in each stage) of the menu through a mobile terminal (a mobile phone, an intelligent bracelet, an intelligent watch and a tablet personal computer), then sends corresponding control instructions to a gas stove through the mobile terminal, and the user selects a menu through an operation button of the mobile terminal, plays the standard operation programs and finishes cooking operation according to the prompt of the standard operation programs. When the gas stove realizes the intelligent menu function, the temperature of the pot bottom needs to be detected in real time through the temperature detection circuit 91, a pot bottom temperature detection signal is sent, and the main controller 20 compares the temperature of the frying pot with the current set temperature; if the temperature of the wok is higher than the current set temperature, controlling the gas stove to reduce the air inflow; if the temperature of the frying pan is lower than the current set temperature, controlling the gas stove to increase the air inflow; and if the temperature of the frying pan is equal to the current set temperature, controlling the gas stove to maintain the current air inflow.

The utility model discloses still provide a gas-cooker, include as above gas-cooker control circuit. The detailed structure of the gas stove control circuit can refer to the above embodiment, and is not described herein; it can be understood, because the utility model discloses used above-mentioned gas-cooker control circuit in the gas-cooker, consequently, the embodiment of the utility model discloses the gas-cooker includes all technical scheme of the whole embodiments of above-mentioned gas-cooker control circuit, and the technological effect that reaches is also identical, no longer gives unnecessary details here.

The above is only the optional embodiment of the present invention, and not therefore the limit of the patent scope of the present invention, all of which are in the concept of the present invention, the equivalent structure transformation of the content of the specification and the drawings is utilized, or the direct/indirect application is included in other related technical fields in the patent protection scope of the present invention.

Claims

1. The utility model provides a gas-cooker control circuit, is applied to in the gas-cooker that has battery and a plurality of furnace ends, its characterized in that, gas-cooker control circuit includes:

2. The gas range control circuit as set forth in claim 1, further comprising:

3. The gas range control circuit as set forth in claim 1, further comprising:

4. The gas cooker control circuit according to claim 3, wherein the ignition detection circuit is specifically configured to output the ignition detection signal upon detection of the micro switch being closed and/or based on the electromotive force generated by the thermocouple.

5. The gas range control circuit as set forth in claim 3, further comprising:

6. The gas range control circuit as set forth in claim 5, further comprising:

7. The gas range control circuit as set forth in claim 1, further comprising:

a temperature detection circuit;

a power switch control circuit;

8. The gas stove control circuit according to claim 5, wherein the main controller is further configured to stop outputting the enable control signal when receiving the power-down trigger signal, so as to control the power conversion circuit to stop outputting the power.

9. The gas range control circuit according to any one of claims 1 to 7, further comprising:

10. A gas range comprising a gas range control circuit according to any one of claims 1 to 7.