Gas safety control device and method based on double-signal detection

Abstract

The invention provides a gas safety control device and method based on double-signal detection, and relates to the technical field of gas safety control. The device comprises a logic control module, a safety execution mechanism and a detection module, the detection module is installed in a combustion area of the gas cooker and is integrated with a temperature sensor or a flame ion sensor, the temperature sensor is used for collecting temperature data around the gas cooker, and the flame ion sensor is used for collecting flame ion current data around the gas cooker; the logic control module comprises a PCB, a logic control chip is integrated in the PCB, and the logic control chip is used for generating a control electric signal corresponding to the detection signal based on the received detection signal sent by the detection module and sending the control electric signal to the safety execution mechanism; and the safety execution mechanism is used for switching the working mode of the safety execution mechanism based on the control electric signal sent by the logic control module so as to control the opening or closing operation of the gas cooker. The problem that gas leakage of original equipment is not detected by a probe is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of gas safety control, and in particular to a gas safety control device and method based on dual signal detection. Background Art

[0002] Currently, gas users generally use this type of gas leak alarm device: when the alarm probe detects that the gas LEL concentration in the space where the gas appliance is used reaches 20%, the probe will transmit the information to the controller. The controller will then automatically trigger an alarm and simultaneously send a signal to the automatic shut-off valve to automatically cut off the gas supply to prevent gas leaks. Some models of products can also synchronize relevant data to the user's mobile phone and big data platform. This type of alarm and shut-off device mainly relies on the gas detection function of the gas alarm probe, and the following problems may occur during user use: (1) Alarm probes mainly use semiconductor sensors, electrochemical gas sensors, optical gas detection sensors or infrared gas detection sensors. At the same time, considering the difficulty and cost of manufacturing, semiconductor sensors are basically the main ones. During the use of the above-mentioned types of gas detection sensors, due to the fumes, dust, steam and other substances generated by the user's gas field blocking the detection port or polluting the detection head, there will be different degrees of abnormal detection sensitivity. Specifically, when the concentration reaches the alarm value, the alarm fails to be issued in time, thereby causing a deflagration accident; or when the concentration does not reach the alarm value, the alarm is falsely issued and the valve is cut off, affecting the user's normal gas use. Due to long-term false alarms, some users choose to turn off the power supply of the alarm, resulting in gas leakage in the later period, which in turn causes gas explosion, with extremely serious consequences! (2) According to GB55009-2021 "Gas Engineering Project Specifications", gas suppliers must provide residential users with free on-site security inspection services every two years. Security inspections can reduce the failure of gas automatic alarm cut-off devices to a certain extent. However, the replacement cost of the gas automatic alarm cut-off device probe provided by the gas supplier is relatively high. The replacement or repair cost of the gas detection probe is usually between 1,500 and 8,000 yuan. Some users choose to buy low-priced products from online shopping malls because the prices are too high. However, the quality of these low-priced online products is difficult to guarantee, and the equipment installation is completed by the user himself, which further increases the risk of gas accidents.

[0003] The above problems need to be solved urgently. Summary of the invention

[0004] The purpose of the present invention is to overcome at least one technical problem existing in the prior art and to provide a gas safety control device and method based on dual signal detection.

[0005] On the one hand, an embodiment of the present invention provides a gas safety control device based on dual signal detection, the device comprising: a logic control module, a safety actuator and a detection module; the detection module is installed in the combustion zone of the gas cooker, and is integrated with a temperature sensor or a flame ion sensor, the temperature sensor is used to collect temperature data around the gas cooker, and the flame ion sensor is used to collect flame ion current data around the gas cooker; the input end of the logic control module is electrically connected to the output end of the detection module, including a PCB board, the PCB board is integrated with a logic control chip, and is used to generate a corresponding control electrical signal based on the detection signal sent by the detection module and send it to the safety actuator; the input end of the safety actuator is connected to the logic control module The output end of the block is electrically connected to switch the working mode of the safety actuator based on the control electrical signal sent by the logic control module, including: when the first electrical signal sent by the logic control module is received, the safety actuator is controlled to be in a temporary start-up mode; when the second electrical signal sent by the logic control module is received, the safety actuator is controlled to be in a closed state; when the third electrical signal sent by the logic control module is received, the safety actuator is controlled to be in a continuous working mode; when the fourth electrical signal sent by the logic control module is received, the safety actuator is controlled to be in a delayed closing mode; the output end of the safety actuator is electrically connected to the gas stove, and is used to control the opening or closing operation of the gas stove based on the working mode of the safety actuator.

[0006] Furthermore, the device also includes a time relay, the input end of the time relay is connected to the logic control module, and the output end of the time relay is connected to the safety actuator, which is used to control the safety actuator to be in a temporary start mode or a delayed shutdown mode.

[0007] Furthermore, a comparator module is integrated in the PCB board, and a comparison circuit is integrated in the comparator module. The comparison circuit is used to convert the detection signal sent by the detection module into an electrical signal, and compare it with a preset numerical value, and generate a corresponding control electrical signal based on the comparison result and send it to the safety actuator.

[0008] Furthermore, the system also includes a manual trigger module, which includes a mechanical start button for starting the gas cooker and sending a start signal to the logic control module.

[0009] Furthermore, the device also includes a power supply module, which is used to provide working power for the device and monitor the power status of the power supply module in real time.

[0010] Furthermore, the device also includes an alarm module, the input end of the alarm module is connected to the output end of the power supply module, and the alarm module is used to issue an alarm prompt when the power status of the power supply module reaches an alarm threshold.

[0011] Furthermore, the device also includes a communication module, the input end of the communication module is connected to the output end of the detection module, and the output end of the communication module is connected to the input end of the logic control module, for sending the signal collected by the detection module to the logic control module.

[0012] Furthermore, a wireless communication port and a wired communication port are integrated in the communication module.

[0013] Furthermore, the safety actuator includes an electric solenoid valve. When the system is normally powered, the electric solenoid valve works normally. When the system is powered off, the electric solenoid valve is in a closed state.

[0014] In a second aspect, an embodiment of the present invention provides a gas safety control method based on dual signal detection, which is applied to the above-mentioned gas safety control device based on dual signal detection, and the method includes: step S1, starting the safety actuator to put the gas cooker in an on state; step S2, starting timing after receiving the on signal of the gas cooker, and sending a first electrical signal to the safety actuator to put the safety actuator in a temporary on mode; step S3, detecting the ambient temperature or flame ion current of the gas cooker through a temperature sensor or a flame ion sensor; step S4, judging whether the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets a preset first judgment condition within a preset first time period; step S5, in response to judging that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets the preset first judgment condition within the preset first time period, sending a third electrical signal to the safety actuator to control the safety actuator to switch to a continuous working mode; step S6, in response to In the step S7, when the safety actuator is in the continuous working mode, the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor does not meet the preset first judgment condition, a second electrical signal is sent to the safety actuator to put the safety actuator in the closed state; step S8, when the received temperature signal or flame ion current signal is in an abnormal state, a fourth electrical signal is sent to the safety actuator to control the safety actuator to be in the delayed closing mode; step S9, within the delayed closing time, it is judged whether the state of the temperature signal or the flame ion current signal is restored to a normal state; step S10, if the received temperature signal or the flame ion current signal is restored to a normal state, the safety actuator is controlled to close the delayed closing mode and switch to the continuous working mode; step S11, if the received temperature signal or the flame ion current signal is not restored to a normal state, the safety actuator is controlled to be in the closed state after the delayed closing time.

[0015] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program implements the above-mentioned gas safety control method based on dual signal detection when executed by the processor.

[0016] In a fourth aspect, an embodiment of the present invention further provides a readable storage medium, which, when instructions in the storage medium are executed by a processor of an electronic device, enables the electronic device to execute the above-mentioned gas safety control method based on dual signal detection.

[0017] The beneficial effects of the present invention are: (1) Using flame ionization detection and temperature detection to replace gas concentration detection, compared with the original probe, it is not only not polluted by steam, oil gas, and dust, but also has high detection accuracy and is not affected by indoor gas flow. Through the logical judgment of flame detection and inlet valve opening, when the power is off, there is no flame, or the flame is accidentally extinguished, the inlet solenoid valve is closed to block the gas leakage. This avoids the problem that the probe fails to detect the gas leakage of the original equipment.

[0018] (2) By controlling the safety actuator based on the flame ion signal and / or temperature signal in a preset logic judgment mode during the use of the gas cooker, the possibility of gas leakage due to power failure, no flame or accidental flame extinguishing during the use of the gas is effectively avoided, and the possibility of gas leakage is effectively reduced at the source of the gas leakage. Compared with the prior art of cutting off the gas only after the gas leaks, the safety of gas use is further improved.

[0019] (3) The flame ionization detection / thermocouple temperature detection probe used in the present invention is low in price, with an online shopping mall purchase price of RMB 10-50. When the number of devices produced reaches 500 or more, the cost can be reduced to RMB 50 per set, which can effectively reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a structural schematic diagram of a gas safety control device based on dual signal detection provided in Example 1 of the present invention.

[0022] Figure 2 It is a circuit principle structure diagram of a logic control unit provided in Example 1 of the present invention.

[0023] Figure 3 This is a topological diagram of a comparison circuit integrated on a PCB board provided in Embodiment 1 of the present invention.

[0024] Figure 4 This is a flow chart of a gas safety control method based on dual signal detection provided in Example 2 of the present invention.

[0025] Figure 5 This is a partial block diagram of an electronic device provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0026] It should be mentioned before discussing the exemplary embodiments in more detail that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the operations as sequential processes, many of the operations therein can be implemented in parallel, concurrently or simultaneously. In addition, the order of the operations can be rearranged. The process can be terminated when its operation is completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0027] It should be understood that, although the terms "first", "second", etc. may be used herein to describe various units, these units should not be limited by these terms. These terms are used only to distinguish one unit from another unit. For example, without departing from the scope of the exemplary embodiments, the first unit may be referred to as the second unit, and similarly the second unit may be referred to as the first unit. The term "and / or" used herein includes any and all combinations of one or more of the listed associated items.

[0028] The present invention will now be described in detail with reference to the accompanying drawings. This figure is a simplified schematic diagram, which only illustrates the basic structure of the present invention in a schematic manner, and therefore only shows the components related to the present invention.

[0029] Example 1 For ease of understanding, the inventive concept is generally described below before describing the embodiments of the present invention in detail: The present application provides a gas safety control device and method based on dual signal detection, in order to solve the following two problems existing in the prior art: First, the combustible gas detection alarm probe is significantly affected by the environment during use. Since the gas appliance is usually installed in the kitchen or workshop, the detection probe is exposed to dust, oil and steam for a long time, which is easy to cause false alarms and misoperation, thereby causing gas accidents. Second, the combustible gas detection alarm probe is a precision instrument, which has a high market price and a relatively large maintenance and replacement cost. The present invention uses a flame detection / temperature detection probe to replace the gas detection probe, and adds a programmable logic controller and a solenoid valve. The main working process is as follows: manually open the inlet solenoid valve of the gas equipment (the valve remains in the open state for 20 seconds), start the gas equipment, and the gas equipment runs, and flame ions and high-temperature flue gas are generated at the same time. After the flame detection / temperature detection probe detects the flame ions or high-temperature flue gas, the signal is transmitted to the logic controller through wireless communication. After receiving the detection end signal, the logic controller sends a signal to the solenoid valve to keep it in the open state. If the ignition fails or the flame is accidentally extinguished, the detection end probe signal disappears, and the inlet solenoid valve of the gas equipment will automatically close within 30 seconds to ensure that the gas will not leak. The entire equipment is battery-powered. In the event of a power outage or power shortage, the solenoid valve will automatically be closed to prevent accidental gas leakage.

[0030] The specific implementation is as follows: like Figure 1 As shown, it is a schematic structural diagram of a gas safety control device based on dual signal detection provided by the present invention.

[0031] As an example, the device includes: a logic control module 1, a safety actuator 2 and a detection module 3; the detection module 3 is installed in the combustion area of ​​the gas cooker, and is integrated with a temperature sensor or a flame ion sensor, the temperature sensor is used to collect temperature data around the gas cooker, and the flame ion sensor is used to collect flame ion current data around the gas cooker; the input end of the logic control module 1 is electrically connected to the output end of the detection module 3, including a PCB board, the PCB board is integrated with a logic control chip, and is used to generate a corresponding control electrical signal based on the detection signal sent by the detection module and send it to the safety actuator 2; the input end of the safety actuator 2 is electrically connected to the output end of the logic control module 1, and is used to generate a corresponding control electrical signal based on the detection signal sent by the detection module The control electrical signal sent by the logic control module 1 switches the working mode of the safety actuator 2, including: when receiving the first electrical signal sent by the logic control module 1, the safety actuator 2 is controlled to be in a temporary start-up mode; when receiving the second electrical signal sent by the logic control module 1, the safety actuator 2 is controlled to be in a closed state; when receiving the third electrical signal sent by the logic control module 1, the safety actuator 2 is controlled to be in a continuous working mode; when receiving the fourth electrical signal sent by the logic control module 1, the safety actuator 2 is controlled to be in a delayed closing mode; the output end of the safety actuator 1 is electrically connected to the gas cooker, and is used to control the gas cooker to turn on or off based on the working mode of the safety actuator 2. Wherein, combined with Figure 2 As shown, the model of the logic control chip is STM32F103C8T6. It should be noted that the specific model of the logic control chip is not limited here, and the relevant technicians can replace the chip model based on actual needs during actual use.

[0032] In some feasible implementations, the device further includes a time relay 4, the input end of the time relay 4 is connected to the logic control module 1, and the output end of the time relay 4 is connected to the safety actuator 2, which is used to control the safety actuator 2 to be in a temporary start mode or a delayed shutdown mode. For ease of understanding, before explaining the working process of the time relay 4, the overall working process of the device is explained here: Step S1, start the safety actuator to put the gas cooker in an on state; Step S2, when the logic control module receives the on signal of the gas cooker, start timing, and send a first electrical signal to the safety actuator to put the safety actuator in a temporary on mode. At this time, the temporary on mode is that the safety actuator is temporarily in an on state, and the holding time is 20-40s. The function of this step is to facilitate sufficient reaction time for the ignition stage of the gas cooker. Step S3, detect the ambient temperature or flame ion current of the gas cooker through a temperature sensor or a flame ion sensor. Step S4: The logic control module determines whether the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets the preset first judgment condition within a preset first time period (20-40s, preferably 20s). The first judgment condition here is that if a temperature sensor is used, the collected temperature data must be greater than or equal to a preset temperature threshold, and the temperature threshold here is 180°C-220°C, preferably 180°C. If a flame ion sensor is used, the first judgment condition is that the current data sent by the received flame ion sensor must be greater than 0. Step S5: In response to determining that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets the preset first judgment condition within the preset first time period, the logic control module sends a third electrical signal to the safety actuator to control the safety actuator to switch to a continuous working mode; that is, when the temperature data or flame ion data collected in the ignition stage meets the preset first judgment condition, it proves that the gas cooker is ignited successfully, and the safety actuator is placed in a normally open state, thereby controlling the gas cooker to work continuously. Step S6, in response to determining within a preset first time period that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor do not meet the preset first judgment condition, the logic control module sends a second electrical signal to the safety actuator to put the safety actuator in a closed state after the first time period ends; that is, when the temperature data or flame ion data collected during the ignition stage do not meet the preset first judgment condition, it proves that the gas stove has failed to ignite. At this time, in order to prevent the gas stove from being in an open state and causing gas leakage, the safety actuator is put in a closed state, so that there is no gas supply at the gas stove inlet valve.Step S7, when the safety actuator is in the continuous working mode, the peripheral temperature or flame ion current of the gas cooker is continuously detected by the temperature sensor or the flame ion sensor. Step S8, when the temperature signal or the flame ion current signal received by the logic control module is in an abnormal state, a fourth electrical signal is sent to the safety actuator to control the safety actuator to be in the delayed closing mode. The abnormal conditions here include: the temperature signal transmitted by the temperature sensor or the ion current signal transmitted by the flame ion sensor is not received, and the temperature data transmitted by the temperature sensor does not reach the preset temperature threshold (180°C), which proves that the gas cooker may have an abnormal flameout at this time. Since there is still gas delivery at the inlet valve at this time, there will be a gas leak. Therefore, in this case, a fourth electrical signal can be sent to the safety actuator to control the safety actuator to be in the delayed closing mode, such as making the safety actuator automatically close after 30s. Step S9: During the delayed closing time, the logic control module determines whether the state of the temperature signal or the flame ion current signal has returned to a normal state; that is, within 30 seconds of the delayed closing, the logic control module continues to judge the received temperature data or flame ion current data. If the temperature data is restored to a state where the temperature threshold is reached or the flame ion current data is restored to a state greater than 0, it proves that the gas cooker has been successfully re-ignited and is in a normal working state. Step S10: If the temperature signal or flame ion current signal received by the logic control module is restored to a normal state, the safety actuator is controlled to turn off the delayed closing mode and switch to a continuous working mode. Step S11: If the temperature signal or flame ion current signal received by the logic control module has not returned to a normal state, the safety actuator is controlled to be in a closed state after the delayed closing time. That is, during the delayed shutdown period, if the gas stove returns to normal working state, the delayed working state will be turned off and restored to the continuous working mode; however, if during the delayed shutdown period, the temperature data or flame ion data obtained by the logic control module has not returned to normal, then after the delay time ends, such as after 30s, the safety actuator will be automatically turned off.

[0033] Specifically, the time needs to be controlled for both the above-mentioned delayed working mode and the temporary start mode, so the above-mentioned time control is achieved by using the time relay 4. For example, the time data is set in advance in the time relay 4, such as 20s and 30s. When the logic control module sends the first electrical signal, the time relay 4 starts timing. After the set 20s time is reached, the electromagnetic valve will be powered off. If during this period, the third electrical signal sent by the logic control module 1 is received, the time relay 4 will still power on the electromagnetic valve after the set 20s time is reached. When the logic control module sends the fourth electrical signal, the time relay 4 starts timing. After the set 30s time is reached, the electromagnetic valve will be powered off. If during this period, the third electrical signal sent by the logic control module 1 is received, the time relay 4 will still power on the electromagnetic valve after the set 30s time is reached.

[0034] In some feasible implementations, the PCB board is integrated with a comparator module, and the comparator module is integrated with a comparison circuit, and the comparison circuit is used to convert the detection signal sent by the detection module into an electrical signal, and compare it with a preset value, and generate a corresponding control electrical signal based on the comparison result and send it to the safety actuator. Figure 3 As shown, the operation amplifier U7 is used to perform logic judgment on the collected temperature data or flame ion data.

[0035] In some feasible implementations, the system further includes a manual trigger module 5 , and the manual trigger module 5 includes a mechanical start button for starting the gas cooker and sending a start signal to the logic control module 1 .

[0036] In some feasible implementations, the device further includes a power supply module 6, which is used to provide working power for the device and monitor the power status of the power supply module in real time. Specifically, the power supply device can be a hybrid power supply composed of a lithium battery pack and a super capacitor. In the case of power failure or power shortage, the solenoid valve is automatically closed to prevent the device from accidentally leaking gas.

[0037] In some feasible implementations, the device further includes an alarm module 7, the input end of the alarm module 7 is connected to the output end of the power supply module 6, and the alarm module 7 is used to issue an alarm prompt when the power status of the power supply module 6 reaches an alarm threshold.

[0038] In some feasible implementations, the device further includes a communication module 8, the input end of the communication module 8 is connected to the output end of the detection module 3, and the output end of the communication module 8 is connected to the input end of the logic control module 1, for sending the signal collected by the detection module 3 to the logic control module 1. Specifically, a wireless communication port and a wired communication port are integrated in the communication module.

[0039] In some feasible implementations, the safety actuator 2 includes an electric solenoid valve. When the system is normally powered, the electric solenoid valve works normally. When the system is powered off, the electric solenoid valve is in a closed state.

[0040] In some feasible implementations, in order to avoid the risk of failure of a single sensor, flame ionization detection and temperature sensor collaborative verification may be used, that is, the temperature sensor and the flame ionization sensor may be integrated into the detection module at the same time.

[0041] In the above implementation, gas leakage caused by ignition failure or flame extinction is effectively avoided through precise valve opening time control and signal detection transmission mechanism. Through the unique power supply mode design, the safety of the equipment is ensured in various power abnormalities and gas leakage caused by equipment failure is prevented. The comprehensive safety protection measures of this device, including power-off cut-off, signal disappearance cut-off, etc., improve the safety and reliability of the use of gas equipment and have broad application prospects. Through the modular design of the detection module, if the probe is found to have problems during the annual inspection, it can be directly disassembled and replaced, which significantly reduces the labor intensity of maintenance personnel. Instead of the highly sensitive and fault-prone combustible gas detection probe, a logical control method that links the switch valve with temperature detection or flame ion detection is adopted, which significantly improves the stability of the equipment for long-term operation while reducing costs.

[0042] It is worth mentioning that all modules involved in this embodiment are logical units. In practical applications, a logical unit can be a physical unit, a part of a physical unit, or a combination of multiple physical units. In addition, in order to highlight the innovative part of the present invention, this embodiment does not introduce units that are not closely related to solving the technical problem proposed by the present invention, but this does not mean that there are no other units in this embodiment.

[0043] Example 2 See also Figure 4 , this embodiment provides a flow chart of a gas safety control method based on dual signal detection.

[0044] As an example, the method is applied to the gas safety control device based on dual signal detection described in Example 1, and the method includes: Step S1, starting the safety actuator to turn on the gas cooker.

[0045] Step S2: When the logic control module receives the start signal of the gas cooker, it starts timing and sends a first electrical signal to the safety actuator to put the safety actuator in a temporary start mode.

[0046] Step S3: detecting the ambient temperature or flame ion current of the gas cooker by using a temperature sensor or a flame ion sensor.

[0047] Step S4: The logic control module determines within a preset first time period whether the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets a preset first judgment condition.

[0048] Step S5, in response to determining that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets the preset first judgment condition within the preset first time period, the logic control module sends a third electrical signal to the safety actuator to control the safety actuator to switch to the continuous working mode.

[0049] Step S6, in response to determining that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor does not meet the preset first judgment condition within the preset first time period, the logic control module sends a second electrical signal to the safety actuator to put the safety actuator in a closed state after the first time period ends.

[0050] Step S7: When the safety actuator is in the continuous working mode, the ambient temperature or flame ion current of the gas cooker is continuously detected by a temperature sensor or a flame ion sensor.

[0051] Step S8: When the temperature signal or the flame ion current signal received by the logic control module is in an abnormal state, a fourth electrical signal is sent to the safety actuator to control the safety actuator to be in a delayed closing mode.

[0052] Step S9: During the delayed closing time, the logic control module determines whether the state of the temperature signal or the flame ion current signal is restored to a normal state.

[0053] Step S10: If the temperature signal or the flame ion current signal received by the logic control module returns to a normal state, the safety actuator is controlled to switch from the time-delay closing mode to the continuous working mode.

[0054] Step S11: If the temperature signal or the flame ion current signal received by the logic control module has not recovered to a normal state, the safety actuator is controlled to be in a closed state after a delayed closing time.

[0055] In some feasible implementations, in order to avoid the risk of failure of a single sensor, flame ionization detection and temperature sensor collaborative verification can be used, that is, the detection module can also integrate both the temperature sensor and the flame ionization sensor. When the detection module integrates both the temperature sensor and the flame ionization sensor, the method includes: Step S1, starting the safety actuator to turn on the gas cooker.

[0056] Step S2: When the logic control module receives the start signal of the gas cooker, it starts timing and sends a first electrical signal to the safety actuator to put the safety actuator in a temporary start mode.

[0057] Step S3: detecting the ambient temperature and flame ion current of the gas cooker by using a temperature sensor and a flame ion sensor.

[0058] Step S4: The logic control module determines within a preset first time period whether the temperature data detected by the temperature sensor and the flame ion current data detected by the flame ion sensor both meet a preset first determination condition.

[0059] Step S5, in response to determining that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meet the preset first judgment condition within the preset first time period, the logic control module sends a third electrical signal to the safety actuator to control the safety actuator to switch to the continuous working mode.

[0060] Step S6, in response to determining that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor do not meet the preset first judgment condition within the preset first time period, the logic control module sends a second electrical signal to the safety actuator to put the safety actuator in a closed state after the first time period ends.

[0061] Step S7: When the safety actuator is in the continuous working mode, the ambient temperature and flame ion current of the gas cooker are continuously detected by the temperature sensor and the flame ion sensor.

[0062] Step S8: When the temperature signal and / or the flame ion current signal received by the logic control module is in an abnormal state, a fourth electrical signal is sent to the safety actuator to control the safety actuator to be in a delayed closing mode.

[0063] Step S9: During the delayed closing time, the logic control module determines whether the states of the temperature signal and the flame ion current signal are restored to normal.

[0064] Step S10: If the temperature signal and the flame ion current signal received by the logic control module are restored to a normal state, the safety actuator is controlled to switch from the time-delay closing mode to the continuous working mode.

[0065] Step S11: If the temperature signal and the flame ion current signal received by the logic control module have not both recovered to a normal state, the safety actuator is controlled to be in a closed state after a delayed closing time.

[0066] It is not difficult to find that this embodiment is a method embodiment corresponding to the first embodiment, and this embodiment can be implemented in conjunction with the first embodiment. The relevant technical details mentioned in the first embodiment are still valid in this embodiment, and in order to reduce repetition, they are not repeated here. Accordingly, the relevant technical details mentioned in this embodiment can also be applied in the first embodiment.

[0067] Example 3 See also Figure 5 An embodiment of the present invention also provides an electronic device, comprising: a memory and a processor; the memory stores at least one program instruction; the processor implements the gas safety control method based on dual signal detection provided in Example 2 by loading and executing the at least one program instruction.

[0068] The memory 702 and the processor 701 are connected in a bus manner, and the bus may include any number of interconnected buses and bridges, and the bus connects various circuits of one or more processors 701 and the memory 702 together. The bus can also connect various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. The bus interface provides an interface between the bus and the transceiver. The transceiver can be one element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices on a transmission medium. The data processed by the processor 701 is transmitted on a wireless medium via an antenna, and further, the antenna also receives data and transmits the data to the processor 701.

[0069] The processor 701 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management and other control functions. The memory 702 can be used to store data used by the processor 701 when performing operations.

[0070] Example 4 The embodiment of the present invention further provides a storage medium, on which a gas safety control method based on dual signal detection is stored, and when the gas safety control program based on dual signal detection is executed by a processor, the steps of the gas safety control method based on dual signal detection as described above are implemented. Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0071] The above is only an embodiment of the present invention. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the invention before the application date or priority date, can know all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the scope of protection of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A gas safety control device based on dual signal detection, characterized in that: The device comprises: a logic control module, a safety actuator and a detection module; The detection module is installed in the combustion area of ​​the gas cooker and is integrated with a temperature sensor or a flame ion sensor. The temperature sensor is used to collect temperature data around the gas cooker, and the flame ion sensor is used to collect flame ion current data around the gas cooker. The input end of the logic control module is electrically connected to the output end of the detection module, and includes a PCB board, in which a logic control chip is integrated, and is used to generate a corresponding control electrical signal based on the detection signal sent by the detection module and send it to the safety actuator; The input end of the safety actuator is electrically connected to the output end of the logic control module, and is used to switch the working mode of the safety actuator based on the control electrical signal sent by the logic control module, including: When receiving the first electrical signal sent by the logic control module, controlling the safety actuator to be in a temporary start-up mode; When receiving the second electrical signal sent by the logic control module, controlling the safety actuator to be in a closed state; When receiving the third electrical signal sent by the logic control module, controlling the safety actuator to be in a continuous working mode; When receiving the fourth electrical signal sent by the logic control module, controlling the safety actuator to be in a delayed closing mode; The output end of the safety actuator is electrically connected to the gas cooker and is used to control the on or off operation of the gas cooker based on the working mode of the safety actuator.

2. The gas safety control device based on dual signal detection according to claim 1 is characterized in that: The device also includes a time relay, the input end of the time relay is connected to the logic control module, and the output end of the time relay is connected to the safety actuator, which is used to control the safety actuator to be in a temporary start mode or a delayed shutdown mode.

3. The gas safety control device based on dual signal detection according to claim 1 is characterized in that: A comparator module is integrated in the PCB board, and a comparison circuit is integrated in the comparator module. The comparison circuit is used to convert the detection signal sent by the detection module into an electrical signal, and compare it with a preset numerical value, and generate a corresponding control electrical signal based on the comparison result and send it to the safety actuator.

4. The gas safety control device based on dual signal detection according to claim 1 is characterized in that: The system further comprises a manual trigger module, wherein the manual trigger module comprises a mechanical start button for starting the gas cooker and sending a start signal to the logic control module.

5. The gas safety control device based on dual signal detection according to claim 1 is characterized in that: The device also includes a power supply module, which is used to provide working power for the device and monitor the power status of the power supply module in real time.

6. The gas safety control device based on dual signal detection according to claim 5 is characterized in that: The device further comprises an alarm module, an input end of the alarm module is connected to an output end of the power supply module, and the alarm module is used for giving an alarm prompt when the power state of the power supply module reaches an alarm threshold.

7. The gas safety control device based on dual signal detection according to claim 1 is characterized in that: The device also includes a communication module, the input end of the communication module is connected to the output end of the detection module, and the output end of the communication module is connected to the input end of the logic control module, and is used to send the signal collected by the detection module to the logic control module.

8. The gas safety control device based on dual signal detection according to claim 7 is characterized in that: The communication module is integrated with a wireless communication port and a wired communication port.

9. The gas safety control device based on dual signal detection according to claim 1, characterized in that: The safety actuator includes an electric solenoid valve. When the system is in a normal power supply state, the electric solenoid valve works normally. When the system is in a power failure state, the electric solenoid valve is in a closed state.

10. A gas safety control method based on dual signal detection, the method being applied to the gas safety control device based on dual signal detection as claimed in any one of claims 1 to 9, characterized in that: The method comprises: Step S1, starting the safety actuator to turn on the gas cooker; Step S2: When the logic control module receives the start signal of the gas cooker, it starts timing and sends a first electrical signal to the safety actuator to put the safety actuator in a temporary start mode; Step S3, detecting the ambient temperature or flame ion current of the gas cooker by means of a temperature sensor or a flame ion sensor; Step S4, the logic control module determines whether the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets a preset first judgment condition within a preset first time period; Step S5, in response to determining that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor meets a preset first judgment condition within a preset first time period, the logic control module sends a third electrical signal to the safety actuator to control the safety actuator to switch to a continuous working mode; Step S6, in response to determining that the temperature data detected by the temperature sensor or the flame ion current data detected by the flame ion sensor does not meet the preset first judgment condition within the preset first time period, the logic control module sends a second electrical signal to the safety actuator to make the safety actuator in a closed state after the first time period ends; Step S7: When the safety actuator is in the continuous working mode, the ambient temperature or flame ion current of the gas cooker is continuously detected by a temperature sensor or a flame ion sensor; Step S8, when the temperature signal or the flame ion current signal received by the logic control module is in an abnormal state, a fourth electrical signal is sent to the safety actuator to control the safety actuator to be in a delayed closing mode; Step S9: within the delay closing time, the logic control module determines whether the state of the temperature signal or the flame ion current signal is restored to a normal state; Step S10: If the temperature signal or the flame ion current signal received by the logic control module returns to a normal state, the safety actuator is controlled to switch from the time-delay closing mode to the continuous working mode; Step S11: If the temperature signal or the flame ion current signal received by the logic control module has not recovered to a normal state, the safety actuator is controlled to be in a closed state after a delayed closing time.

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