A gas stove controller capable of detecting abnormal leakage of gas and preventing deflagration

Abstract

This utility model discloses a gas stove controller capable of detecting abnormal gas leaks and preventing deflagration, belonging to the field of gas stove control technology. It aims to solve the technical problems of current gas stoves, such as the difficulty in timely detection of gas leaks, the high risk of deflagration after a leak, and the lack of efficient and reliable safety protection mechanisms. The controller includes a main control board for signal processing and command output, a DC 5V power module providing power to the entire controller, two ignition switches, two gas valves for controlling the gas flow, a gas detection probe for collecting gas concentration signals, and two ignition actuators that work in conjunction with the two ignition switches to control ignition. This utility model solves the core problem of existing separate designs that cannot simultaneously block ignition and gas supply after a leak, completely eliminating the risk of deflagration after a leak and significantly improving the safety of gas stove use.

Description

Technical Field

[0001] This utility model relates to the field of gas stove control technology, and more specifically, to a gas stove controller that can detect abnormal gas leaks and prevent deflagration. Background Technology

[0002] Currently, most mainstream gas stove controllers on the market adopt a separate design architecture for the "ignition control module" and the "gas detection module": the ignition function is realized by an independent electromagnetic switch and high-voltage ignition component, which is only responsible for responding to the user's ignition operation; some products equipped with gas detection function can only trigger a simple alarm (such as a buzzer prompt) after collecting a leak signal through a sensor, and cannot be linked with ignition control and gas passage control.

[0003] This design presents a significant safety hazard: when the gas stove experiences abnormal leakage due to aging valve body seals, loose pipes, or other reasons, even if the detection module identifies the leak, the ignition module may still be in a standby or false ignition state. Simultaneously, the gas valve cannot close in time, allowing the leaking gas to directly contact the ignition mechanism, which can easily lead to a deflagration accident. This design fails to meet the safety requirement of gas stoves to "block the risk source immediately upon leakage." Therefore, we propose a gas stove controller that can detect abnormal gas leaks and prevent deflagration. Utility Model Content

[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology, adapt to the needs of reality, and provide a gas stove controller that can detect abnormal gas leaks and prevent deflagration, so as to solve the technical problems of current gas stoves having difficulty in timely detection of gas leaks, easy deflagration accidents after leaks, and lack of efficient and reliable safety protection mechanisms.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a gas stove controller that can detect abnormal gas leaks and prevent deflagration, including a main control board for signal processing and command output, a DC5V power module for providing working power to the entire controller, two ignition switches, two gas valves for controlling the opening and closing of the gas passage, a gas detection probe for collecting gas concentration signals, and two ignition execution components that cooperate with the two ignition switches to realize ignition control. One end of each of the two ignition switches is electrically connected to the two ignition control outputs of the main control board, and one end of each of the two gas valve bodies is electrically connected to the two valve body control outputs of the main control board. The other ends of the two ignition switches and the two gas valve bodies are connected in parallel to the two ignition actuators, and the power supply terminals of the two ignition switches and the two gas valve bodies are all connected to a DC5V power module.

[0006] This invention integrates a DC5V power module, a gas detection probe, an ignition switch, a gas valve body, and ignition actuators on a main control board to construct an integrated control system for detection, judgment, and execution. When the gas detection probe detects that the gas concentration exceeds a preset threshold, the main control board can simultaneously output commands: on the one hand, it cuts off the ignition switch to stop the ignition action, and on the other hand, it closes the gas valve body to block the gas passage, realizing fully automatic linkage of "gas leak detection - signal feedback - ignition stop - gas cut-off". From the control logic level, it directly solves the core problem of existing separate designs that cannot simultaneously block ignition and gas sources after a leak, completely eliminating the risk of deflagration after a leak and significantly improving the safety of gas stoves.

[0007] Preferably, the main control board has a built-in signal processing unit that can perform AD conversion and filtering on the analog signals input from the gas detection probe, and a logic control unit for pre-storing control programs.

[0008] Preferably, the main control board is provided with a manual control interface that can be connected to the ignition button and the fire-off button on the cooktop panel.

[0009] Preferably, the main control board is also externally connected to a buzzer and LED indicator for realizing audible and visual alarms.

[0010] Preferably, the gas detection probe is mounted on the main control board, and the DC5V power module, two ignition switches, two gas valve bodies, and two ignition actuators are all electrically connected to the main control board.

[0011] Preferably, the two ends of the DC5V power module are electrically connected to the power input terminal and the ground terminal of the main control board, respectively, and the two ignition actuators are connected in parallel.

[0012] Compared with the prior art, the beneficial effects of this utility model are: 1. This utility model integrates a DC5V power module, a gas detection probe, an ignition switch, a gas valve body, and ignition actuators on a main control board to construct an integrated control system for detection, judgment, and execution. When the gas detection probe detects that the gas concentration exceeds a preset threshold, the main control board can simultaneously output commands: on the one hand, cut off the ignition switch to stop the ignition action, and on the other hand, close the gas valve body to block the gas passage, realizing fully automatic linkage of "gas leak detection - signal feedback - ignition stop - gas cut-off". From the control logic level, it directly solves the core problem of existing separate designs that cannot simultaneously block ignition and gas source after a leak, completely eliminating the risk of deflagration after a leak and significantly improving the safety of gas stoves.

[0013] 2. This utility model further optimizes the integrity and operational flexibility of safety protection by connecting an external buzzer and LED indicator to the main control board and adding a manual control interface. When leakage protection is triggered, the audible and visual alarm can promptly remind the user to check the leak point, avoiding the neglect of potential hazards due to reliance solely on automatic shutdown. At the same time, the manual control interface supports external ignition / off buttons, and manual control has higher priority than automatic control. This ensures user convenience during normal use and allows for manual shutdown of the risk source in special circumstances. It compensates for the lack of user awareness and operational limitations in extreme scenarios when relying solely on automatic linkage protection, forming a multi-layered safety protection system of automatic shutdown + active reminder + manual backup, further improving the safety, reliability, and practicality of the controller. Attached Figure Description

[0014] Figure 1 This is a circuit connection schematic diagram of this utility model. Detailed Implementation

[0015] like Figure 1 As shown, the present invention relates to a gas stove controller that can detect abnormal gas leaks and prevent deflagration, including a main control board for signal processing and command output, a DC5V power module for providing power to the entire controller, two ignition switches, two gas valves for controlling the opening and closing of the gas passage, a gas detection probe for collecting gas concentration signals, and two ignition execution components that cooperate with the two ignition switches to achieve ignition control. The gas detection probe is mounted on the main control board, and the DC5V power module, two ignition switches, two gas valve bodies, and two ignition actuators are all electrically connected to the main control board. In the embodiments of this utility model, the main control board is used as the core control unit to integrate four major functional modules: power supply, detection, ignition, and valve body control. This enables fully automatic linkage of "gas leak detection - signal feedback - ignition stop - gas cut-off", eliminating the risk of deflagration after leakage from the electrical control level and significantly improving the safety of gas stove use.

[0016] In an embodiment of this utility model, the two ends of the DC5V power module are electrically connected to the power input terminal and the ground terminal of the main control board, respectively. Its output voltage is stable at DC5V±0.2V, providing an adaptive power supply for the main control board and electrical components such as gas detection probe, ignition switch, and gas valve body, ensuring stable operation of each component.

[0017] In an embodiment of this utility model, the signal output terminal of the gas detection probe is electrically connected to the signal input terminal of the main control board. The probe uses a semiconductor gas sensor, which can detect the gas concentration in the environment in real time (detection range 0-10000ppm). When the gas concentration is detected to exceed the preset threshold (default setting is 10% of the lower explosive limit), a high-level alarm signal is immediately sent to the main control board.

[0018] In the embodiments of this utility model, both ignition switches are electromagnetic switches, and their control terminals are electrically connected to the two ignition control output terminals of the main control board respectively; the output terminals of the two ignition switches are electrically connected to the two ignition execution components respectively, and the main control board can independently control the on / off state of the two ignition switches to realize the ignition control of a single burner or a dual burner.

[0019] In the embodiments of this utility model, both gas valve bodies are electromagnetic control valves, and their control terminals are electrically connected to the two valve body control output terminals of the main control board. The two gas valve bodies are connected in series in the gas inlet pipes of the two burners of the gas stove. The main control board controls the opening and closing of the valve bodies by outputting control signals, thereby realizing the opening and closing of the gas passage of the corresponding burner.

[0020] In an embodiment of this utility model, the main control board has a built-in signal processing unit and a logic control unit. The signal processing unit can perform AD conversion and filtering on the analog signal input from the gas detection probe. The logic control unit has a pre-stored control program that can automatically execute the ignition stop-valve closing command according to the gas detection signal, with a response time of ≤0.5s, to ensure that the risk source is quickly cut off after a leak.

[0021] In the embodiments of this utility model, the ignition execution component adopts a high-voltage pulse ignition method. Its working voltage is provided by a DC5V power module through the internal boost circuit of the main control board (output high voltage 15-20kV). The ignition frequency is 5-8 times / second, the ignition success rate is ≥99%, and it also has an ignition timeout protection function, that is, it automatically stops if the duration of a single ignition exceeds 10s.

[0022] In an embodiment of this utility model, the main control board is also provided with a manual control interface, which can be connected to the ignition button and the turn-off button on the stove panel. Users can trigger the ignition or cut-off command by manual operation. Manual control has a higher priority than automatic control, taking into account both automatic safety protection and the convenience of manual operation.

[0023] The two ends of the DC5V power module are electrically connected to the power input terminal (VCC pin) and the ground terminal (GND pin) of the main control board through wires, respectively. At the same time, it is connected in parallel to two ignition actuators to provide a stable DC5V working power supply for the entire controller. One end of each of the two ignition switches is electrically connected to the two ignition control outputs (DH1 pin and DH2 pin) of the main control board, and one end of each of the two gas valve bodies is electrically connected to the two valve control outputs (FT1 pin and FT2 pin) of the main control board. The other ends of the two ignition switches and the two gas valve bodies are connected in parallel to the two ignition actuators. The two ignition actuators are connected to the main control board. The power supply terminals of the two ignition switches and the two gas valve bodies are all connected to a DC5V power module.

[0024] In the embodiments of this utility model, the gas detection probe uses a methane sensor of model MQ-4, which has a detection accuracy of ±5%FS and a response time of ≤10s, and can effectively detect common gaseous gases such as natural gas and liquefied petroleum gas; the main control board uses an STM32F103 microcontroller with a built-in 12-bit AD converter, which can accurately acquire the analog signal of the gas detection probe and realize logical judgment and instruction output through pre-stored programs.

[0025] In another embodiment of this utility model, the main control board can also be connected to an external buzzer and LED indicator. When the gas detection probe detects a gas leak, in addition to controlling the ignition switch to turn off and the valve body to close, the main control board can also control the buzzer to emit an audible and visual alarm to further remind the user of the risk of gas leak.

[0026] Working principle: This embodiment provides a gas stove controller that can detect abnormal gas leaks and prevent deflagration. During use, it operates in two states: normal operation and leak protection. Normal operating state: When the user presses the ignition button on the cooktop panel, the manual control signal is transmitted to the main control board. The main control board outputs a high-level signal to the ignition switch and gas valve body of the corresponding burner: the ignition switch closes, and the corresponding ignition actuator generates a high-voltage pulse for ignition; the gas valve body opens, and the gas enters the burner and mixes with the air before being ignited; after successful ignition, the user releases the ignition button, the main control board maintains the gas valve body in the open state, the ignition switch is turned off, and ignition stops.

[0027] Leakage protection status: If a gas leak occurs during use or when not ignited, and the gas detection probe detects that the gas concentration exceeds the preset threshold, it will immediately send an alarm signal to the main control board. After receiving the signal, the main control board will immediately execute the protection command: output a low-level signal to all ignition switches to cut off the power supply to the ignition actuator and stop ignition; at the same time, output a low-level signal to all gas valves to close the gas passage and prevent further gas leakage; if an external audible and visual alarm module is connected, the alarm will be triggered synchronously at this time. The controller can be manually reset to normal working state after the leakage hazard is eliminated and the gas concentration returns to normal.

[0028] The embodiments disclosed herein are preferred embodiments, but are not limited thereto. Those skilled in the art can readily grasp the spirit of this utility model based on the above embodiments and make different extensions and variations. However, as long as they do not depart from the spirit of this utility model, they are all within the protection scope of this utility model.

Claims

1. A gas range controller capable of detecting abnormal leakage of gas and preventing deflagration, characterized by, It includes a main control board for signal processing and command output, a DC5V power module that provides power to the entire controller, two ignition switches, two gas valves for controlling the opening and closing of the gas passage, a gas detection probe for collecting gas concentration signals, and two ignition actuators that work with the two ignition switches to achieve ignition control. One end of each of the two ignition switches is electrically connected to the two ignition control outputs of the main control board, and one end of each of the two gas valve bodies is electrically connected to the two valve body control outputs of the main control board. The other ends of the two ignition switches and the two gas valve bodies are connected in parallel to the two ignition actuators, and the power supply terminals of the two ignition switches and the two gas valve bodies are all connected to a DC5V power module.

2. A gas stove controller capable of detecting abnormal gas leaks and preventing deflagration according to claim 1, characterized in that, The main control board has a built-in signal processing unit that can perform AD conversion and filtering on the analog signals input from the gas detection probe, and a logic control unit for pre-storing control programs.

3. The gas stove controller capable of detecting abnormal leakage of gas and preventing deflagration according to claim 1, characterized in that, The main control board is equipped with a manual control interface that can be connected to the ignition and off buttons on the cooktop panel.

4. The gas stove controller capable of detecting abnormal leakage of gas and preventing deflagration according to claim 1, characterized in that, The main control board is also externally connected to a buzzer and LED indicator for audible and visual alarms.

5. The gas stove controller capable of detecting abnormal leakage of gas and preventing deflagration according to claim 1, characterized in that, The gas detection probe is mounted on the main control board, and the DC5V power module, two ignition switches, two gas valve bodies, and two ignition actuators are all electrically connected to the main control board.

6. The gas stove controller capable of detecting abnormal leakage of gas and preventing deflagration according to claim 1, characterized in that, The two ends of the DC5V power module are electrically connected to the power input terminal and the ground terminal of the main control board, respectively, and are branched and connected in parallel to two ignition actuators.

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