Gas stove fire-off control method and device and gas stove

Abstract

The application discloses a gas stove fire-off control method and device and a gas stove, and is applied to the field of kitchen appliances. In response to a target fire-off command, a boost circuit is controlled to perform boost processing on an input voltage. During the boost processing, it is monitored whether the voltage after the boost processing by the boost circuit reaches a voltage threshold. When the voltage after the boost processing by the boost circuit reaches the voltage threshold, a valve circuit is driven based on the voltage after the boost processing to close a gas valve of the gas stove, so that the gas stove is extinguished. The application reduces the battery consumption of the gas stove and realizes remote and timed fire-off while saving energy.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of kitchen appliances, and particularly relates to a gas stove fire control method and device and a gas stove. BACKGROUND

[0002] A gas stove generally uses a flame-out valve, that is, a thermocouple is used to detect a flame, and when the thermocouple detects the flame, an electric current capable of maintaining the valve body open is generated. When the flame is extinguished, the electric current disappears, so that the valve body is closed.

[0003] However, in some application scenarios, the flame-out valve is not applicable, and a valve closing control circuit needs to be added to implement the closing of the valve body of the gas stove to shut off the gas. The valve closing control circuit requires a high power supply voltage, while the battery voltage of the gas stove is relatively low, generally about 3V. During the operation of the gas stove, the battery voltage needs to be continuously boosted and then provided to the valve closing control circuit, and the continuous boosting process causes the battery of the gas stove to consume power quickly. SUMMARY

[0004] The embodiments of the present application provide a gas stove fire control method, device and gas stove, which at least partially solve the technical problem of quick battery power consumption of the gas stove.

[0005] In a first aspect, the embodiments of the present application provide a gas stove fire control method, comprising:

[0006] In response to a target fire control command, a boost circuit is controlled to boost an input voltage;

[0007] During the boosting process, it is monitored whether the voltage after the boosting by the boost circuit reaches a voltage threshold;

[0008] When the voltage after the boosting by the boost circuit reaches the voltage threshold, a valve closing circuit is driven based on the voltage after the boosting to close a gas valve of the gas stove, so that the gas stove is extinguished.

[0009] In combination with the first aspect, in some embodiments, the target fire control command comprises:

[0010] a timing fire control command, or

[0011] a remote instant fire control command.

[0012] In combination with the first aspect, in some embodiments, if the target fire control command is a timing fire control command;

[0013] The response to the target fire control command to control the boost circuit to boost the input voltage comprises:

[0014] When the timing fire control command is acquired, a timing is started.

[0015] trigger the boost circuit to boost the input voltage when a timing duration reaches a timing threshold indicated by the timing-off command.

[0016] With reference to the first aspect, in some embodiments, the control of the boost circuit to boost the input voltage comprises:

[0017] outputting a pulse signal of a preset frequency to the boost circuit to drive the boost circuit to boost the input voltage.

[0018] With reference to the first aspect, in some embodiments, after the closing of the gas valve of the gas stove by the closing valve circuit driven by the voltage after the boost processing, the method further comprises:

[0019] stopping the output of the pulse signal to the boost circuit to end the boost processing process of the boost circuit.

[0020] With reference to the first aspect, in some embodiments, the closing valve circuit comprises a switch tube connected between the boost circuit and the gas valve, and the closing of the gas valve of the gas stove by the closing valve circuit driven by the voltage after the boost processing comprises:

[0021] controlling the switch tube to be turned on so that the current output by the boost circuit acts on the gas valve to trigger the closing of the gas valve.

[0022] With reference to the first aspect, in some embodiments, the monitoring of whether the voltage after the boost processing by the boost circuit reaches a voltage threshold comprises:

[0023] sampling the voltage after the boost processing by the boost circuit through a voltage sampling circuit to obtain a current voltage sampling value;

[0024] determining whether the current voltage sampling value is greater than or equal to the voltage threshold, and if yes, indicating that the voltage after the boost processing by the boost circuit reaches the voltage threshold.

[0025] Secondly, the present application provides a gas stove off control device, comprising:

[0026] a boost control unit configured to control a boost circuit to boost an input voltage in response to a target off command;

[0027] a voltage monitoring unit configured to monitor whether a voltage after the boost processing by the boost circuit reaches a voltage threshold during the boost processing;

[0028] The valve closing control unit is configured to drive the valve closing circuit to close the gas valve of the gas stove based on the voltage after the voltage boosting processing when the voltage after the voltage boosting processing reaches the voltage threshold, so as to make the gas stove be extinguished.

[0029] In a third aspect, the embodiments of the present application provide a gas stove, comprising:

[0030] A gas valve arranged on a gas path of the gas stove;

[0031] A valve closing circuit connected with the gas valve;

[0032] A voltage boosting circuit connected with an input end of the valve closing circuit;

[0033] A controller connected with the voltage boosting circuit and the valve closing circuit;

[0034] A memory and a computer program stored on the memory and executable on the processor, and the controller implements the method in any one of claims 1-7 when executing the computer program.

[0035] In combination with the second aspect, in some embodiments, the controller is a single-chip microcomputer.

[0036] The one or more technical solutions provided by the embodiments of the present application at least achieve the following technical effects or advantages:

[0037] In response to a target fire extinguishing command, the voltage boosting circuit is controlled to perform voltage boosting processing on the input voltage; during the voltage boosting processing, it is monitored whether the voltage after the voltage boosting processing by the voltage boosting circuit reaches a voltage threshold; when the voltage after the voltage boosting processing by the voltage boosting circuit reaches the voltage threshold, the valve closing circuit is driven to close the gas valve of the gas stove based on the voltage after the voltage boosting processing, so as to make the gas stove be extinguished. Thus, the gas stove is only controlled to be boosted for a short time in the case of obtaining a special fire extinguishing command, so as to meet the valve closing requirement of the gas stove based on the valve closing circuit, and the battery energy consumption loss caused by continuous voltage boosting is avoided. Therefore, the battery consumption of the gas stove is reduced, and the remote and timed fire extinguishing is realized while being more energy-saving. BRIEF DESCRIPTION OF DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0039] Figure 1 A structural schematic diagram of a gas stove in the embodiments of the present application;

[0040] Figure 2 Flow chart of the gas stove fire control method in the embodiment of the present application;

[0041] Figure 3 Interaction schematic diagram of the gas stove fire control method in the embodiment of the present application;

[0042] Figure 4 Functional module diagram of the gas stove fire control device in the embodiment of the present application. DETAILED DESCRIPTION

[0043] In view of the technical problem that the battery of the gas stove consumes electricity quickly, the embodiment of the present application provides a gas stove fire control method, device and gas stove, and the general idea is as follows:

[0044] When the gas stove is normally running, no boosting operation is performed, and the boosting circuit is controlled to boost to the voltage required by the valve closing circuit only when the target fire closing command is acquired. When the voltage after boosting reaches the voltage threshold, the valve closing circuit is driven based on the voltage after boosting to close the gas valve of the gas stove, so that the valve closing operation based on the valve closing circuit is satisfied based on short-time boosting, and remote and timing fire closing is realized while saving energy.

[0045] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0046] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not necessarily have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0047] In the first aspect, with reference to Figure 1As shown, this embodiment of the invention provides a gas stove 10, including: a valve shut-off circuit 102, a pressure boosting circuit 103, a controller 104, and a gas valve 105 disposed on the gas circuit of the gas stove. The gas valve 101 is connected to one end of the valve shut-off circuit 102, while the other end of the valve shut-off circuit 102 is connected to the pressure boosting circuit 103; the controller 104 is connected to both the pressure boosting circuit 103 and the valve shut-off circuit 102. The gas stove 10 also includes a memory 101, which stores code that can be executed on the controller 104. When the controller 104 executes the code, it implements the gas stove flame-off control method provided in this embodiment of the invention.

[0048] The controller 1 can be a microcontroller unit (MCU), also known as a single-chip microcomputer or microcontroller. Correspondingly, the memory 103 can be the ROM (Read-Only Memory) on the microcontroller.

[0049] Secondly, embodiments of the present invention provide a gas stove flameout control method, which can be used for... Figure 1 The gas stove shown is equipped with a flame-off control; specifically, it can be controlled by... Figure 1 Controller 104 in the middle executes to... Figure 1 The boost circuit 103 and valve-closing circuit 102 control the gas valve 105 to close. (Reference) Figure 2 As shown, the gas stove's flameout control method includes the following steps:

[0050] S101, In response to the target shutdown command, control the boost circuit to boost the input voltage.

[0051] In this embodiment of the invention, the target turn-off command can be a remote, instant turn-off command from an external device. The external device can be a mobile terminal, such as a smartphone or tablet, and has an app installed on it for data interaction with the gas stove. This app displays various data information from the gas stove and sends control commands to the gas stove, such as a remote, instant turn-off command. Specifically, the remote, instant turn-off command can be generated based on user operations on the external device, or it can be automatically generated by the external device based on a pre-set cooking program.

[0052] Unlike the above implementation, the target shut-off command can also be a timed shut-off command. Specifically, the target shut-off command can be a local timed shut-off command generated by the gas stove according to a preset cooking program or the user's timed shut-off operation, or it can be a remote timed shut-off command from an external device.

[0053] It should be understood that neither the remote instant fire-off command nor the timing fire-off command can trigger the fire-off valve, resulting in the need to implement the fire-off valve through the fire-off valve circuit.

[0054] In some embodiments, if the target fire-off command is a timing fire-off command, a timing clock is started when the timing fire-off command is obtained, and the boost circuit is triggered to boost the input voltage when the timing duration reaches the timing threshold indicated by the timing fire-off command. Since the boost process of the boost circuit is not triggered immediately at the time when the command is received, unnecessary damage to the battery caused by early boosting is avoided.

[0055] In some embodiments, if the target fire-off command is a timing fire-off command, in order to improve the fire-off response speed, the controller can trigger the boost circuit to boost the input voltage by a preset duration in advance, so that the voltage after the boost processing of the boost circuit reaches the voltage threshold when the timing duration reaches the timing threshold.

[0056] Specifically, the preset duration is set according to the time required for the boost circuit to boost the input voltage to reach the voltage threshold. For example, if the boost circuit can boost the input voltage 3V to 12V required by the fire-off valve circuit within 8 seconds, the preset duration can be configured as 8 seconds. Then, at the moment when the timing duration is 8 seconds away from reaching the timing threshold, the controller triggers the boost circuit to boost the input voltage.

[0057] In some embodiments, if the target fire-off command is a remote instant fire-off command, the controller triggers the boost circuit to boost the input voltage at the moment when the remote instant fire-off command is received.

[0058] In the embodiment of the application, the controller triggers the boost circuit to boost the input voltage, specifically: the controller outputs a pulse signal of a preset frequency to the boost circuit to drive the boost circuit to boost the input voltage. The pulse signal can be a PWM (Pulse Width Modulation) waveform signal, so that the frequency and duty cycle of the PWM waveform signal can be set as needed to adjust the time required for boosting.

[0059] Specifically, the input voltage of the boost circuit in the embodiment of the application can be provided by the battery voltage of the gas stove, that is, the input voltage of the boost circuit is the same as the power supply voltage of the controller, and this voltage is generally lower than the working voltage required by the fire-off valve circuit. For example, the battery voltage can be about 3V, and the working voltage of the fire-off valve circuit of the gas stove needs to be 12V. Specifically, the input voltage of the boost circuit can also be the voltage after the battery voltage is processed by the power supply chip and other circuits.

[0060] For example, the input voltage of the boost circuit can be 3.3V of the battery voltage, but because the input voltage is related to the design of the gas stove, the specific value of the input voltage is not limited in the embodiments of the present application.

[0061] In the embodiments of the present application, the higher the frequency of the PWM waveform signal is, the faster the boost speed of the boost circuit is. By driving the boost circuit to boost through the PWM waveform with a preset frequency, the voltage can be raised to the voltage required for the valve closing circuit to work in a fixed time. The frequency of the PWM waveform signal can be set in the range of 300-500KHz.

[0062] Specifically, when the frequency of the PWM waveform signal is 300KHz, the boost speed of the boost circuit will be accelerated. On this basis, the boost speed of the boost circuit will also be increased with the increase of the frequency of the PWM waveform signal. However, when the frequency of the PWM waveform signal is higher than 500KHz, the boost speed will be increased slowly with the increase of the frequency of the PWM waveform signal. Therefore, by setting the frequency of the PWM waveform signal in the range of 300-500KHz, energy saving and fast boosting can be achieved.

[0063] It should be understood that the boost circuit in the embodiments of the present application can use the direct current boost circuit designed in the related art. For example, in some embodiments, the boost circuit can use a multi-stage series direct current boost sub-circuit, wherein each stage of the boost sub-circuit includes a capacitor element and a triode, which will not be described here.

[0064] S102, in the boost processing process, whether the voltage after the boost processing by the boost circuit reaches a voltage threshold is monitored.

[0065] A voltage sampling circuit is arranged at the output end of the boost circuit, the voltage after the boost processing by the boost circuit is sampled by the voltage sampling circuit to obtain a current voltage sampling value; whether the current voltage sampling value is greater than or equal to the voltage threshold is determined; if yes, it indicates that the voltage after the boost processing by the boost circuit reaches the voltage threshold.

[0066] The current voltage sampling value is detected by the controller, and whether it is greater than or equal to the voltage threshold is determined. Specifically, the voltage threshold is set according to the voltage required for the valve closing circuit to work, and needs to be greater than or equal to the voltage required for the valve closing circuit to work. In order to save the battery loss, the smaller the difference between the voltage threshold and the voltage required for the valve closing circuit to work is, the shorter the boost time is, and the smaller the battery loss is.

[0067] S103, when the voltage after the voltage boosting processing reaches the voltage threshold, driving the closing valve circuit to close the gas valve of the gas stove based on the voltage after the voltage boosting processing, so as to turn off the gas stove.

[0068] In some embodiments, when the output voltage of the voltage boosting circuit reaches the voltage threshold, the voltage boosting circuit provides the working voltage to the closing valve circuit to drive the closing valve circuit to close the gas valve, so as to turn off the gas stove. Specifically, the closing valve circuit outputs a current opposite to the valve suction current to the gas valve under the working voltage, so as to offset the valve suction current, and thus close the gas valve.

[0069] In the case that the gas valve is an electromagnetic valve, the closing valve circuit discharges to the gas valve to generate a current opposite to the valve suction current, so as to offset the valve suction current, and thus the electromagnetic valve has no electromagnetic suction force, and is reset and closed by the spring, so as to turn off the gas stove.

[0070] In some embodiments, the closing valve circuit can include a switch tube, and two ends of the switch tube are connected to the voltage boosting circuit and the gas valve, respectively. When the voltage after the voltage boosting processing reaches the voltage threshold, the controller controls the switch tube to be conductive, so that the output end of the voltage boosting circuit releases a current opposite to the valve suction current of the gas valve, so as to offset the valve suction current, and thus close the gas valve. The switch tube can be a triode or a MOS tube, etc.

[0071] Further, after controlling the gas stove to close the valve, the controller stops outputting the pulse signal to the voltage boosting circuit, so as to end the voltage boosting processing of the voltage boosting circuit, and avoid unnecessary energy consumption. Only when remote turning off or timing turning off is needed, the voltage boosting circuit will boost for a short time, and then will not continue to boost. For one remote or timing turning off, the working time of the voltage boosting circuit is short, and thus the battery consumption is small, and the energy saving of the gas stove is improved.

[0072] For the switch tube as the closing valve circuit, after controlling the gas stove to close the valve, the controller stops outputting the pulse signal to the voltage boosting circuit, and also controls the switch tube to be non-conductive, so that the voltage boosting circuit cannot continue to discharge to the gas valve.

[0073] For the gas stove turning off control method provided by the embodiments of the present application, the following describes an example in which the controller is a single-chip microcomputer, and the implementation process in one implementation scenario is described. Figure 3 The implementation process in one implementation scenario is described.

[0074] During gas stove operation, if the microcontroller receives a timed shut-off command, it triggers the start of a timer. This command carries a timed duration threshold (e.g., M hours) or a timed duration threshold (XX hours XX minutes XX). The microcontroller then determines if the timed duration or duration threshold has been reached. If so, it outputs a PWM signal to the boost circuit to boost the input voltage. It monitors whether the boosted voltage reaches a voltage threshold. If so, it drives the valve-closing circuit to close the gas valve, thus extinguishing the gas stove. After the valve is closed, the microcontroller disables the boost output; specifically, it stops outputting PWM signals to the boost circuit and controls the valve-closing circuit to shut off.

[0075] Secondly, based on the same inventive concept, embodiments of the present invention provide a gas stove flameout control device, see reference. Figure 4 As shown, the gas stove flameout control device includes:

[0076] The boost control unit 401 is used to control the boost circuit to boost the input voltage in response to a target shutdown command;

[0077] The voltage monitoring unit 402 is used to monitor whether the voltage after being boosted by the boost circuit reaches the voltage threshold during the boost process.

[0078] The valve shut-off control unit 403 is used to drive the valve shut-off circuit to close the gas valve of the gas stove based on the voltage after the voltage is boosted by the boost circuit and reaches the voltage threshold.

[0079] In some implementations, the target shutdown command includes:

[0080] Timed shutdown command, or

[0081] Remote, instant shutdown command.

[0082] In some implementations, if the target shutdown command is a timed shutdown command, the boost control unit 401 includes:

[0083] The timing subunit is used to start the timing count when a timed shutdown command is received;

[0084] The boost subunit is used to trigger the boost circuit to boost the input voltage when the timing duration reaches the timing threshold indicated by the timing shutdown command.

[0085] In some implementations, the boost subunit is specifically used to: output a pulse signal of a preset frequency to the boost circuit to drive the boost circuit to boost the input voltage.

[0086] In some embodiments, the gas stove flameout control device includes:

[0087] The stopping control unit is configured to stop outputting the pulse signal to the voltage boosting circuit to end the voltage boosting process of the voltage boosting circuit.

[0088] In some embodiments, the valve closing circuit comprises a switch tube connected between the voltage boosting circuit and the gas valve, and the valve closing control unit 403 is specifically configured to:

[0089] Control the switch tube to be conductive, so that the current output by the voltage boosting circuit acts on the gas valve to trigger the gas valve to close.

[0090] In some embodiments, the voltage monitoring unit 402 comprises:

[0091] The voltage sampling subunit is configured to sample the voltage processed by the voltage boosting circuit through the voltage sampling circuit to obtain a current voltage sampling value.

[0092] The voltage judgment subunit is configured to judge whether the current voltage sampling value is greater than or equal to the voltage threshold value, and if so, it is indicated that the voltage processed by the voltage boosting circuit reaches the voltage threshold value.

[0093] The gas stove fire closing control device in the embodiment of the application is a device for implementing the above-mentioned gas stove fire closing control method, and more implementation details can be referred to the embodiment of the gas stove fire closing control method. For the sake of brevity of the description, it will not be repeated here.

[0094] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored on or transferred over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the disclosure and appended claims. For example, due to the nature of software, functions described above can be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions can also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations. Also, as technology evolves, the underlying device implementations could change while still fulfilling the functions described herein.

[0095] In several embodiments provided in the present application, it should be understood that the disclosed technical contents can be implemented by other ways. Among them, the above-mentioned device embodiments are only schematic, for example, the division of the units can be a logical function division, and actual implementation can have another division way, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed each other can be through some interface, indirect coupling or communication connection between units or modules, which can be electrical or other forms.

[0096] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0097] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0098] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A method for controlling the flameout of a gas stove, characterized in that, The gas stove includes: a gas valve disposed on the gas circuit of the gas stove, a valve-closing circuit connected to the gas valve, a booster circuit connected to the input terminal of the valve-closing circuit, and a controller connected to the booster circuit and the valve-closing circuit; the method includes: In response to a target shutdown command, the boost control unit controls the boost circuit to boost the input voltage, including: outputting a pulse signal of a preset frequency to the boost circuit to drive the boost circuit to boost the input voltage, wherein the preset frequency is in the range of 300KHz-500KHz; During the boost process, the voltage monitoring unit monitors whether the voltage after being boosted by the boost circuit reaches the voltage threshold. When the voltage after being boosted by the boost circuit reaches the voltage threshold, the valve shut-off control unit drives the valve shut-off circuit to close the gas valve of the gas stove based on the boosted voltage, so as to extinguish the gas stove. This includes: the boost circuit providing a working voltage to the valve shut-off circuit to drive the valve shut-off circuit to shut off the gas valve.

2. The method as described in claim 1, characterized in that, The target shutdown command includes: Timed shutdown command, or Remote, instant shutdown command.

3. The method as described in claim 2, characterized in that, If the target shutdown command is a timed shutdown command; The step of controlling the boost circuit to boost the input voltage in response to a target shutdown command includes: Upon receiving the timed shutdown command, start the timer. When the timing duration reaches the timing threshold indicated by the timing shutdown command, the boost circuit is triggered to boost the input voltage.

4. The method as described in claim 1, characterized in that, After the voltage-driven valve-closing circuit based on the boosted voltage closes the gas valve of the gas stove, the method further includes: Stop outputting the pulse signal to the boost circuit to end the boost process of the boost circuit.

5. The method as described in claim 1, characterized in that, The valve-closing circuit includes a switching transistor connected between the boost circuit and the gas valve. The valve-closing circuit, driven by the boosted voltage, closes the gas valve of the gas stove, including: The switching transistor is turned on so that the current output by the boost circuit acts on the gas valve, triggering the gas valve to close.

6. The method as described in claim 1, characterized in that, The monitoring of whether the voltage after being boosted by the boost circuit reaches the voltage threshold includes: The voltage sampled by the voltage sampling circuit is used to sample the voltage after it has been boosted by the boost circuit to obtain the current voltage sample value; Determine whether the current voltage sample value is greater than or equal to the voltage threshold. If so, it indicates that the voltage after being boosted by the boost circuit has reached the voltage threshold.

7. The method according to any one of claims 1-6, characterized in that, The controller is a microcontroller.

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