Integrated stove ignition device and method

Abstract

This invention provides an integrated stove ignition device and method. First, a detection module detects the status data of the integrated stove; then, a controller, based on the status data, controls the ignition module to ignite. This method improves the safety of using the integrated stove by determining that there are no safety hazards in the current environment through the integrated stove's status data before ignition.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliances technology, and in particular to an integrated stove ignition device and method. Background Technology

[0002] In related technologies, the pulse igniter of integrated cooktops typically ignites directly upon receiving an ignition command. However, this method is less safe when the integrated cooktop itself or the surrounding environment may present certain hazardous factors. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide an integrated stove ignition device and method to improve the safety of integrated stoves during use.

[0004] In a first aspect, embodiments of the present invention provide an integrated stove ignition device, including a detection module, a controller, and an ignition module; the controller is connected to both the detection module and the ignition module; the detection module is used to detect the status data of the integrated stove; the controller is used to control the ignition module to ignite based on the status data.

[0005] In conjunction with the first aspect, the present invention provides a first possible implementation of the first aspect, wherein the detection module includes a self-state detection unit and an environmental state detection unit of the integrated stove; the state data includes the self-state data of the integrated stove and the environmental state data; the self-state detection unit is used to acquire the self-state data of the integrated stove; and the environmental state detection unit is used to acquire the environmental state data of the integrated stove.

[0006] In conjunction with the first possible implementation of the first aspect, this embodiment of the invention provides a second possible implementation of the first aspect, wherein the controller is further configured to determine the environmental state of the integrated stove based on environmental state data; the environmental state includes safety or fault; the controller is further configured to control the ignition module to ignite based on its own state data when the environmental state is safe.

[0007] In conjunction with the second possible implementation of the first aspect, this embodiment of the invention provides a third possible implementation of the first aspect, wherein the aforementioned environmental state detection unit includes a gas sensor, a firewall sensor, and an anti-dry-burning sensor; the gas sensor is used to detect the gas concentration; the firewall sensor is used to detect the flame intake of the flue; the flame intake includes flame intake into the flue or no flame intake into the flue; the anti-dry-burning sensor is used to detect the dry-burning of the cookware placed on the integrated stove; the dry-burning includes dry-burning or no dry-burning; the controller is further used to determine that the environmental state is safe when the gas concentration is less than a preset concentration threshold, and the flame intake is no flame intake into the flue, and the dry-burning is no dry-burning; the controller is further used to determine that the environmental state is faulty when the gas concentration is greater than or equal to the preset concentration threshold, and / or the flame intake is flame intake into the flue, and / or the dry-burning is dry-burning.

[0008] In conjunction with the second possible implementation of the first aspect, this embodiment of the invention provides a fourth possible implementation of the first aspect, wherein the aforementioned self-state data includes a switch signal and a fire level; the switch signal includes an on signal or an off signal; the fire level includes a zero level and other levels; the controller is further configured to control the ignition module to ignite when the switch signal is an on signal and the fire level is another level.

[0009] In conjunction with the third possible implementation of the first aspect, this embodiment of the invention provides a fifth possible implementation of the first aspect, wherein the above-mentioned device further includes an alarm module; the alarm module is connected to a controller; the controller is used to control the alarm module to issue an alarm signal when the environmental condition is faulty.

[0010] In conjunction with the fourth possible implementation of the first aspect, this embodiment of the invention provides a sixth possible implementation of the first aspect, wherein the controller is further connected to a preset range hood module; the controller is further configured to control the range hood module to turn on when the switch signal is an on signal; and the controller is further configured to control the range hood module to turn off when the switch signal is a off signal.

[0011] In conjunction with the sixth possible implementation of the first aspect, this embodiment of the invention provides a seventh possible implementation of the first aspect, wherein the above-mentioned device further includes a Bluetooth module; the Bluetooth module is connected to the controller; and the controller communicates with the range hood module through the Bluetooth module.

[0012] In conjunction with the sixth possible implementation of the first aspect, this embodiment of the invention provides an eighth possible implementation of the first aspect, wherein the controller is further configured to control the smoke hood module to start when the environmental condition is faulty.

[0013] Secondly, embodiments of the present invention also provide an integrated stove ignition method, which is applied to the aforementioned integrated stove ignition device, the integrated stove ignition device including a detection module, a controller, and an ignition module; the method includes: the detection module detecting the status data of the integrated stove; and the controller controlling the ignition module to ignite based on the status data.

[0014] The embodiments of the present invention bring the following beneficial effects:

[0015] This invention provides an integrated stove ignition device and method. First, a detection module detects the status data of the integrated stove; then, a controller, based on the status data, controls the ignition module to ignite. This method improves the safety of using the integrated stove by igniting only after confirming there are no safety hazards in the current environment through the integrated stove's status data.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of an integrated stove ignition device provided in an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal signal transmission and control relationship of a pulse ignition device provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram illustrating the linkage control relationship between a pulse ignition device and a smoke hood, provided in an embodiment of the present invention.

[0022] Figure 4 This is a schematic diagram of the structure and connection of a pulse ignition device provided in an embodiment of the present invention;

[0023] Figure 5 A flowchart illustrating the working process of an ignition device provided in an embodiment of the present invention;

[0024] Figure 6 A flowchart of an integrated stove ignition method provided in an embodiment of the present invention;

[0025] Figure 7 This is a schematic diagram of an integrated stove provided in an embodiment of the present invention. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Currently, most pulse igniters in integrated stoves only have pulse ignition function, which is limited and not conducive to integrated and systematic control. If there were a pulse igniter that could integrate functions such as firewall, gas sensitivity, and anti-dry burning, it would not only meet the needs of integration and modularization, but also facilitate after-sales maintenance.

[0028] Based on this, the integrated stove ignition device and method provided in this embodiment of the invention can be applied to various integrated stoves.

[0029] To facilitate understanding of this embodiment, a detailed description of an integrated stove ignition device disclosed in this embodiment of the invention will be provided first.

[0030] This invention provides an integrated stove ignition device, such as... Figure 1 As shown, the device includes a detection module 10, a controller 20, and an ignition module 30; the controller is connected to both the detection module and the ignition module; the detection module is used to detect the status data of the integrated stove; the controller is used to control the ignition module to ignite based on the status data.

[0031] In a specific implementation, the aforementioned detection module may include a self-state detection unit and an environmental state detection unit for the integrated stove; the state data includes the integrated stove's own state data and environmental state data. Correspondingly, the self-state detection unit is used to acquire the integrated stove's own state data; the environmental state detection unit is used to acquire the integrated stove's environmental state data.

[0032] The aforementioned controller can first determine the environmental status of the integrated stove based on environmental status data; the environmental status includes safety or fault; and when the environmental status is safe, it controls the ignition module to ignite based on its own status data.

[0033] Specifically, the aforementioned environmental status detection unit may include a gas sensor, a firewall sensor, and an anti-dry-burning sensor. The gas sensor detects the gas concentration; the firewall sensor detects the flame intake of the flue; flame intake includes whether a flame is being drawn into the flue or not; the anti-dry-burning sensor detects the dry-burning of cookware placed on the integrated stove; dry-burning includes whether dry-burning is present or absent; the controller further determines the environmental status as safe when the gas concentration is less than a preset concentration threshold, and the flame intake is absent from the flue and the dry-burning is absent; the controller further determines the environmental status as faulty when the gas concentration is greater than or equal to the preset concentration threshold, and / or the flame intake is present in the flue, and / or the dry-burning is present.

[0034] The aforementioned self-status data includes a switch signal; the switch signal is either an on signal or an off signal. The self-status data may also include the firepower level, which can be zero or other levels; the controller is also used to control the ignition module to ignite when the switch signal is an on signal and the firepower level is other levels.

[0035] Specifically, the device also includes an alarm module; the alarm module is connected to the controller; the controller is used to control the alarm module to issue an alarm signal when the environmental condition is faulty.

[0036] To ensure timely removal of cooking fumes generated by the integrated cooktop, the aforementioned controller is also connected to a pre-installed range hood module. When the switch signal is "on," the controller activates the range hood module; when the switch signal is "off," the controller deactivates the range hood module. In the event of an environmental fault, the controller can activate the range hood module.

[0037] Specifically, the device may also include a Bluetooth module; the Bluetooth module is connected to the controller; the controller communicates with the range hood module through the Bluetooth module.

[0038] This invention provides an integrated stove ignition device. First, a detection module detects the status data of the integrated stove; then, a controller, based on the status data, controls the ignition module to ignite. This method improves the safety of using the integrated stove by igniting only after confirming there are no safety hazards in the current environment through the integrated stove's status data.

[0039] This invention provides another integrated stove ignition device (also known as a pulse ignition device), which... Figure 1 This is implemented on the device shown. Figure 2 The diagram shows the internal signal transmission and control relationships of the pulse ignition device.

[0040] The device mainly includes: 1. a main controller module; 2. a sensor detection module; 3. a valve body control module; 4. a pulse ignition module; and 5. a cooktop status detection module. The sensor detection module includes a gas sensor, a firewall sensor, and a dry-burning prevention sensor with pot detection. Data detected by the sensor detection module, such as gas leaks, flame intake in the flue, and dry burning of the cooktop, is transmitted to the main controller module. The cooktop status detection module detects the cooktop status switch signal to determine the cooktop's on / off state and the firepower level. This detected status is transmitted to the main controller module, which controls the pulse ignition module to ignite the cooktop and controls the valve body module to maintain the normal operation of the main valve and the high-power valve, and to close the valve body. The gas sensor can be directly connected to a gas sensor or connected to a gas sensor module, receiving and processing the information from the receiving module. The firepower switch can be a common microswitch, or it can use a potentiometer, coded switch, or magnetic induction switch to detect the firepower switch information.

[0041] Figure 3 The diagram illustrates the linkage control relationship between the pulse ignition device and the range hood. Specifically, communication can be established via wired connection, Bluetooth, or Wi-Fi module. The pulse ignition device connects to the range hood control module through a communication interface. When the cooktop is turned on or off, it transmits status information to the range hood control module via the communication interface, controlling the range hood to automatically turn its fan speed on or off. Similarly, when the cooktop detects an malfunction, it also sends a signal to the range hood control module, controlling the range hood to turn its fan speed on or off.

[0042] Figure 4 The diagram shows the structural connection of the pulse ignition device. The main controller, a pot detection and anti-dry-burning sensor, a firewall sensor, a gas sensor, a valve body, a stove status switch, and a communication interface constitute the pulse ignition device. Unlike ordinary pulse igniters, which only realize pulse ignition and valve body control functions, this device achieves integrated control of the peripheral functions of the pulse igniter used in integrated stoves by detecting the pot detection and anti-dry-burning sensor, the firewall sensor, the gas sensor, and the stove status switch.

[0043] Figure 5 The flowchart shown above illustrates the working process of the ignition device. Its specific implementation method and principle are as follows:

[0044] 1. When the machine is powered on, the main control module detects the gas sensor in real time and judges the sensor data in real time. When the system continues for a period of time T1 (preferably 1-3 minutes), it compares the voltage data with the threshold V1 (preferably 0.5V). If it is greater than V1, it is judged as a gas leak, an alarm is triggered, and the stove valve control module is controlled to close the valve body and cut off the gas passage. At the same time, the fault signal is transmitted to the range hood control module through the communication interface to turn on the range hood airflow to ventilate and disperse the gas.

[0045] 2. When the stove knob is pressed down and rotated, the pulse ignition module is controlled to ignite the stove. At the same time, the valve body module is controlled to keep the main valve and the high-power valve closed. The stove status detection module detects that the stove is open and the fire level is detected. The stove opening signal is transmitted to the range hood control module through the communication interface to turn on the range hood airflow. At the same time, the firewall sensor placed in the range hood duct is detected. The temperature is compared with the temperature threshold K1. If it is greater than K1, it is determined that there is a flame being drawn into the duct. The stove valve body control module is controlled to close the valve body, cut off the gas passage, and extinguish the burner flame. At the same time, a signal is sent to the range hood control module through the communication interface to control the range hood to turn off the airflow. The K1 setting value is adjusted according to the structure of the burner and the range hood duct. Generally, 125°C is preferred. At the same time, the temperature change of the firewall sensor will be judged. Within a period of time T2, the temperature rise value is compared with the threshold K2. If it is greater than K2, it is determined that there is fire drawn into the air duct. T2 is generally set within 30 seconds, preferably 15 seconds. The K2 setting value is adjusted according to the structure of the burner and the flue duct, and is generally preferred to be 20℃.

[0046] 3. After the stove is turned on and a pot is placed on it, the anti-dry-burning sensor with pot detection detects the pot being placed and controls the valve body control module to open the high-heat valve, automatically switching to high-heat mode. Simultaneously, the temperature of the pot is detected. First, it is determined whether the food in the pot is liquid or oily by judging the difference in boiling points between water and oil. After a period of time T3 (preferably 10 seconds), a timer starts at a temperature value K3 (preferably 100℃). The rising temperature value is compared with a threshold K4 (preferably 5℃). If it is greater than K4, it is oily; if it is less than K4, it is watery. The dry-burning threshold for liquids is K5 (preferably 180℃). When it exceeds K5, a dry-burning alarm is triggered, and the stove valve body control module closes the valve, cutting off the gas supply. The dry-burning threshold for oils is K6 (preferably 290℃). When it exceeds K6, a dry-burning alarm is triggered.

[0047] The aforementioned pulse ignition device can operate by connecting to a standard mechanical valve assembly, or it can be connected to an intelligent control valve to control the intelligent operation of the gas.

[0048] The aforementioned multi-functional pulse ignition device can achieve detection and control functions such as anti-dry burning, firewall, and gas sensitivity. By adding these detection functions to the pulse ignition device, a multi-functional integrated pulse ignition device can be achieved, which can both integrate control and modularize related functions for convenient after-sales maintenance. Based on this ignition device, an intelligent ignition control method can also be implemented. Through intelligent algorithms, multiple sensors can be centrally processed, facilitating the use of intelligent control algorithms and improving the efficient coordination of sensors and related controls, thereby enhancing intelligent control capabilities.

[0049] Corresponding to the above-described device embodiments, this invention also provides an integrated stove ignition method. This method is applied to the aforementioned integrated stove ignition device, which includes a detection module, a controller, and an ignition module. Figure 6 As shown, the method includes the following steps:

[0050] Step S600: The detection module detects the status data of the integrated stove.

[0051] In step S602, the controller controls the ignition module to ignite based on the status data.

[0052] The integrated stove ignition method provided in this embodiment of the invention has the same technical features as the integrated stove ignition device provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0053] Corresponding to the above-described device embodiments, this invention also provides an integrated stove, such as... Figure 7 As shown, the integrated stove includes an integrated stove body 100 and an integrated stove ignition device 200.

[0054] The integrated stove provided in this embodiment of the invention has the same technical features as the integrated stove ignition device provided in the above embodiment, so it can also solve the same technical problems and achieve the same technical effects.

[0055] The computer program product of the integrated stove device and method provided in the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the preceding method embodiments. For specific implementation, please refer to the method embodiments, which will not be repeated here.

[0056] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working process of the system and apparatus described above can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0057] Furthermore, in the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0058] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion 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 this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0059] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0060] Finally, it should be noted that the above embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An integrated stove ignition device, characterized in that, It includes a detection module, a controller, and an ignition module; the controller is connected to both the detection module and the ignition module. The detection module is used to detect the status data of the integrated stove; The controller is used to control the ignition module to ignite based on the status data; The detection module includes a self-state detection unit and an environmental state detection unit for the integrated stove; the state data includes the self-state data of the integrated stove and the environmental state data. The self-state detection unit is used to acquire the self-state data of the integrated stove; The environmental status detection unit is used to acquire environmental status data of the integrated stove; The controller is also used to determine the environmental status of the integrated stove based on the environmental status data; the environmental status includes safety or malfunction. The controller is also used to control the ignition module to ignite based on its own state data when the environmental state is safe. The environmental condition detection unit includes a gas sensor, a firewall sensor, and an anti-dry-burning sensor. The gas sensor is used to detect the concentration of the gas. Firewall sensors are used to detect flame intake in the flue; the flame intake includes whether flame is being drawn into the flue or not. The anti-dry-burning sensor is used to detect the dry-burning status of the cookware placed on the integrated stove; the dry-burning status includes dry-burning or no dry-burning. The controller is also used to determine that the environmental state is safe when the gas concentration is less than a preset concentration threshold, the flame intake situation is no flame intake into the flue, and the dry burning situation is no dry burning. The controller is also used to determine that the environmental state is a fault when the gas concentration is greater than or equal to a preset concentration threshold, and / or the flame intake situation is that there is flame intake into the flue, and / or the dry burning situation is that there is dry burning. The self-status data includes a switch signal and a power level; the switch signal includes an on signal or an off signal; the power level includes zero level and other levels. The controller is also used to control the ignition module to ignite when the switch signal is an on signal and the firepower level is another level; The controller is also connected to a preset range hood module; the controller is also used to control the range hood module to turn on when the switch signal is an on signal; the controller is also used to control the range hood module to turn off when the switch signal is a off signal; the controller is also used to control the range hood module to turn on when the environmental condition is a fault. The working process of the integrated stove ignition device includes: After power-on, the controller determines the data of the gas sensor. If the data of the gas sensor is greater than V1 within time T1, it is determined that there is a gas leak and an alarm is triggered. When the stove knob is pressed down and rotated, the ignition module is activated to ignite the stove. The stove status detection unit detects that the stove is on and sends the stove on signal to the range hood control module to turn on the range hood airflow. The firewall sensor installed in the range hood duct detects the flame and compares the temperature with the temperature threshold K1. If the temperature is greater than K1, it is determined that a flame is being drawn into the duct. At the same time, the temperature change of the firewall sensor is also measured. Within a certain period of time T2, the temperature rise is compared with the threshold K2. If the temperature rise is greater than K2, it is determined that a flame is being drawn into the duct. After the stove is turned on and the pot is placed on it, timer T3 starts when the pot's temperature reaches K3. The rising temperature is compared with the threshold K4. If it is greater than K4, it means the food in the pot is oily; if it is less than K4, it means the food is liquid. For liquid food, when the pot's temperature is greater than K5, a dry-burning alarm is triggered, and the stove's valve control module closes the valve to cut off the gas supply. For liquid food, when the temperature is greater than K6, a dry-burning alarm is triggered.

2. The apparatus according to claim 1, characterized in that, The device further includes an alarm module; the alarm module is connected to the controller; the controller is used to control the alarm module to issue an alarm signal when the environmental condition is faulty.

3. The apparatus according to claim 1, characterized in that, The device also includes a Bluetooth module; the Bluetooth module is connected to the controller; the controller communicates with the smoke machine module through the Bluetooth module.

4. An ignition method for an integrated stove, characterized in that, The method is applied to the integrated stove ignition device as described in any one of claims 1-3, wherein the integrated stove ignition device includes a detection module, a controller, and an ignition module; the method includes: The detection module detects the status data of the integrated stove; The controller controls the ignition module to ignite based on the status data; The detection module includes a self-state detection unit and an environmental state detection unit for the integrated stove; the state data includes the self-state data of the integrated stove and the environmental state data; the method further includes: The self-state detection unit acquires the self-state data of the integrated stove; The environmental status detection unit acquires the environmental status data of the integrated stove; The controller is further configured to determine the environmental status of the integrated stove based on the environmental status data; the environmental status includes safety or malfunction; the method further includes: When the environmental condition is safe, the controller controls the ignition module to ignite based on its own state data; The environmental condition detection unit includes a gas sensor, a firewall sensor, and an anti-dry-burning sensor; the method further includes: The gas-sensitive sensor detects the gas concentration; Firewall sensors detect flame intake in the flue; the flame intake includes whether flame is being drawn into the flue or not. The anti-dry-burning sensor detects whether the cookware placed on the integrated stove is dry-burning; the dry-burning situation includes whether there is dry burning or not. When the gas concentration is less than a preset concentration threshold, the flame intake situation is no flame intake into the flue, and the dry burning situation is no dry burning, the controller determines that the environmental state is safe. The controller determines the environmental state as faulty when the gas concentration is greater than or equal to a preset concentration threshold, and / or when the flame intake situation is that there is flame intake into the flue, and / or when the dry burning situation is that there is dry burning. The self-status data includes a switch signal and a power level; the switch signal includes an on signal or an off signal; the power level includes zero and other levels; the method further includes: When the switch signal is an on signal and the firepower level is another level, the controller controls the ignition module to ignite. The controller is also connected to a preset range hood module; the method further includes: controlling the range hood module to turn on when the switch signal is an on signal; controlling the range hood module to turn off when the switch signal is a off signal; and controlling the range hood module to turn on when the environmental condition is a fault. The working process of the integrated stove ignition device includes: After power-on, the controller determines the data of the gas sensor. If the data of the gas sensor is greater than V1 within time T1, it is determined that there is a gas leak and an alarm is triggered. When the stove knob is pressed down and rotated, the ignition module is activated to ignite the stove. The stove status detection unit detects that the stove is on and sends the stove on signal to the range hood control module to turn on the range hood airflow. The firewall sensor installed in the range hood duct detects the flame and compares the temperature with the temperature threshold K1. If the temperature is greater than K1, it is determined that a flame is being drawn into the duct. At the same time, the temperature change of the firewall sensor is also measured. Within a certain period of time T2, the temperature rise is compared with the threshold K2. If the temperature rise is greater than K2, it is determined that a flame is being drawn into the duct. After the stove is turned on and the pot is placed on it, timer T3 starts when the pot's temperature reaches K3. The rising temperature is compared with the threshold K4. If it is greater than K4, it means the food in the pot is oily; if it is less than K4, it means the food is liquid. For liquid food, when the pot's temperature is greater than K5, a dry-burning alarm is triggered, and the stove's valve control module closes the valve to cut off the gas supply. For liquid food, when the temperature is greater than K6, a dry-burning alarm is triggered.

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