Device for realizing linkage of gas leakage alarm and gas meter gas cut-off by using intelligent battery

Abstract

The invention relates to the technical field of intelligent batteries, in particular to a device for achieving gas leakage alarm and gas meter gas cut-off linkage through an intelligent battery, the device comprises the intelligent battery, the intelligent battery is used for being matched with an electronic gas meter with a power-down automatic valve closing function so as to conduct gas cut-off linkage after gas leakage, and the intelligent battery comprises a battery shell, a power supply module and a power supply module. The lithium battery is arranged in the shell and is used for providing initial electric energy; the DC-DC conversion circuit is arranged in the battery shell and is connected with the lithium battery; the intelligent battery can receive an external wireless signal, when the signal comes, the intelligent battery is powered off, at the moment, when the gas meter detects that the external voltage disappears, a motor valve in the gas meter is cut off at the first time to block gas output, and even if external power supply is recovered, the gas meter cannot immediately supply gas to the outside; a user must manually press a red button on the gas meter for more than 4 seconds, and then the gas meter can close the motor valve to supply gas again.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of intelligent battery, and particularly relates to a device for realizing gas leakage alarm and gas meter gas cut linkage by using an intelligent battery. BACKGROUND

[0002] At present, gas household projects are being carried out on a large scale all over the country. The natural gas pipe network that could only be used in cities in the past has basically been covered in remote rural areas, and the work efficiency fully reflects the speed of China. However, there is a major social problem that ordinary users have little knowledge of safe use of gas and technical risks. The most core problem is that once gas leaks, it will pose a great risk and harm, such as gas explosion.

[0003] At present, gas projects all over the country almost use the data transmission type Internet of Things gas meter, which increases the accuracy of measurement and reduces the cost of household meter reading. Such gas meters have a common feature and are required by the national standard, that is, they can remotely cut off the gas supply. There are two red line standards for gas cut. One is that the user is in arrears, and the gas company can remotely issue a gas cut order. The second is that when the battery voltage in the gas meter is too low or the power is off, the gas meter will lock the motor valve in the meter in the first time, thereby cutting off the gas supply. This function mainly prevents users from "stealing gas", so this function is the most core interest protection of gas meter production enterprises and gas companies. Almost all electronic gas meters on the market have this function. Four No. 5 batteries are generally installed in the electronic gas meter to provide power.

[0004] Ordinary people have little resistance to the risk of gas leakage and need to rely entirely on the technical protection means of the gas company. The key technology is to cut off the gas in the first time when the gas leaks, thereby preventing the occurrence of explosion. For this problem, the relevant policies and regulations of the state have strict standards and technical indicators. For example, the gas alarm and electromagnetic valve linkage method is used to cut off the gas pipeline output in the first time when the gas danger is found, thereby effectively preventing the risk of explosion.

[0005] The above-mentioned policies and regulations and technical means are very effective, but in daily life, the gas company and the relevant construction unit often do not install gas alarms and alarm linkage devices for users in the process of natural gas transformation and implementation due to practical reasons such as the need for project speed, cost control, etc., which hides a huge safety hazard for the society.

[0006] This phenomenon is currently widespread in the country, and ordinary users have almost zero gas risk and protection capability.

[0007] Individual cities issue gas alarms to ordinary users as early warning protection, but although the gas alarm can detect gas leakage and generate an alarm, when there is no alarm linkage device such as an electromagnetic cut-off valve installed, the alarm has little meaning because the gas leakage cannot be blocked and the explosion risk continues to rise. If an alarm linkage device is installed for the user, the market unit price of the device is above 1000 yuan, which is expensive, so the most essential problem cannot be solved due to the current contradiction. SUMMARY

[0008] In view of the problems in the prior art, the present application aims to overcome the shortcomings of the prior art and provide a device for realizing gas leakage alarm and gas meter gas cut-off linkage by using an intelligent battery. The technical scheme adopted by the present application to solve the technical problems is: a device for realizing gas leakage alarm and gas meter gas cut-off linkage by using an intelligent battery, comprising an intelligent battery, the intelligent battery being used in cooperation with an electronic gas meter with a power-off automatic valve closing function to realize gas cut-off linkage after gas leakage, the intelligent battery comprising: a battery shell, a lithium battery arranged in the shell and used to provide initial electric energy; a DC-DC conversion circuit arranged in the battery shell and connected with the lithium battery, the DC-DC conversion circuit being used to convert the voltage output by the lithium battery into a preset voltage; a wireless communication module arranged in the battery shell and used to receive an external gas leakage linkage control signal; a normally closed electronic switch circuit connected in series in the output loop of the DC-DC conversion circuit; wherein the normally closed electronic switch circuit remains in a conduction state when the wireless communication module does not receive an external gas leakage linkage signal, and when the wireless communication module receives an external control signal, the normally closed electronic switch circuit is driven to be disconnected, thereby cutting off the external output voltage of the intelligent battery.

[0009] The present application has the following advantages: (1) The device for realizing gas leakage alarm and gas meter gas cut-off linkage by using an intelligent battery can receive an external wireless signal, and when a signal comes, the battery will be powered off and will not output voltage externally. At this time, when the external voltage disappears, the gas meter will cut off the motor valve in the gas meter to block the gas output. At this time, even if the external power supply is restored, the gas meter will not immediately output gas externally. The user must manually press the red button on the gas meter for more than 4 seconds, and the gas meter will close the motor valve to supply gas again. The signal transmitting end only needs a normal remote controller or a Bluetooth transmitting device. The button of the signal transmitting device is a normally open contact, which only needs to be directly connected to the normally open contact of the gas alarm. Once the gas alarm appears, the relay will be attracted, the wireless signal will be sent, the battery will be powered off, the electronic gas meter with remote communication function will cut off the gas supply, and the risk blocking is completed.

[0010] (2) The device for realizing gas leakage alarm and gas meter gas cut linkage by using intelligent battery, alarm linkage is realized by the intelligent No. 5 battery, the structure and function of the existing gas pipeline can not be changed, and the alarm linkage is realized by using the function of the gas meter.

[0011] (3) The device for realizing gas leakage alarm and gas meter gas cut linkage by using intelligent battery, the No. 5 battery used in the application is powered by a built-in lithium battery, the form is a standard AA battery size, the inside is DC-DC reduced to 1.5V, USB can be used to charge it repeatedly, and the cost is less than 10 yuan. Ordinary users often need to replace the battery of the gas meter at home for half a year to one year, and this cost needs to be purchased and solved by the user, and through the intelligent battery, the core problem of the user alarm linkage is solved without increasing the cost of the user. BRIEF DESCRIPTION OF DRAWINGS

[0012] The application will be further described below in combination with the drawings and examples.

[0013] Figure 1 The intelligent battery power supply flowchart of the device for realizing gas leakage alarm and gas meter gas cut linkage by using intelligent battery provided by the application; Figure 2 The communication module flowchart provided by the application; Figure 3 The lithium battery power supply diagram provided by the application; Figure 4 The gas leakage monitoring flowchart provided by the application; Figure 5 The three-dimensional structure schematic diagram of the device for realizing gas leakage alarm and gas meter gas cut linkage by using intelligent battery provided by the application; Figure 6 The axial view of the device for realizing gas leakage alarm and gas meter gas cut linkage by using intelligent battery provided by the application; Figure 5 Figure 7 The three-dimensional structure schematic diagram of the intelligent battery provided by the application; Figure 8 The internal schematic diagram of the intelligent battery provided by the application; Reference signs: 100, gas meter; 110, battery compartment; 200, gas alarm; 300, intelligent battery; 310, battery shell; 320, charging interface; 330, lithium battery; 340, circuit board; 360, wireless communication module. DETAILED DESCRIPTION

[0014] ​In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in conjunction with specific embodiments.

[0015] It should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0016] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the present application can be understood according to the specific circumstances.

[0017] As shown in Figures 1-6 A device for realizing gas leakage alarm and gas meter 100 gas cut linkage by using intelligent battery according to the present application, which comprises an intelligent battery 300, the intelligent battery 300 is used for cooperating with an electronic gas meter 100 with power-off automatic valve closing function to realize gas leakage and gas cut linkage, the intelligent battery 300 comprises: a battery shell 310, a lithium battery 330 arranged in the shell, used for providing initial electric energy; A DC-DC conversion circuit arranged in the battery shell 310 and connected with the lithium battery 330, the DC-DC conversion circuit is used for converting the voltage output by the lithium battery into a preset voltage; A wireless communication module 360 arranged in the battery shell 310, used for receiving an external gas leakage linkage control signal; A normally closed electronic switch circuit connected in series in the output loop of the DC-DC conversion circuit; The normally closed switch circuit maintains the conduction state when the wireless communication module 360 does not receive the external gas leakage linkage signal, and drives the normally closed electronic switch circuit to be disconnected when the wireless communication module 360 receives the external control signal, thereby cutting off the external output voltage of the intelligent battery 300.

[0018] The intelligent battery 300 is used in combination with the electronic gas meter 100 with the automatic valve closing function, and is linked through power supply, signal receiving and switch control. The lithium battery provides initial power, the DC-DC conversion circuit converts the voltage into a preset voltage suitable for the electronic gas meter 100, and stably outputs 1.5V. The normally closed electronic switch circuit is connected in series in the output loop, and remains conductive when no control signal is connected, thereby continuously supplying power to the electronic gas meter 100. When the wireless communication module 360 receives an external gas leakage linkage control signal, the normally closed electronic switch circuit is driven to be disconnected, thereby cutting off the power supply, and the electronic gas meter 100 is automatically closed due to the drop in voltage.

[0019] The electronic gas meter 100 itself has the function of closing the valve when the power is off, without the need to modify the natural gas meter body, thereby reducing the adaptation cost. The normally closed switch is in the default conductive state, thereby ensuring stable power supply in normal working conditions and avoiding misjudgment. The modular design has stronger adaptability. In the kitchen of a city resident's house, the electronic gas meter 100 has the function of automatically closing the valve when the power is off. The battery compartment 110 is designed for 4 No. 5 batteries, and the intelligent battery 300 is a lithium battery with a capacity of 2000mAh. The intelligent battery 300 is placed in the battery compartment 110 of the electronic gas meter 100, and is powered by the DC-DC conversion circuit to supply 1.5V voltage to the electronic gas meter 100. When gas leakage is detected, the signal emitting device arranged in the corner of the kitchen emits a control signal. After the communication module of the intelligent battery 300 receives the signal, the power supply is cut off, and the electronic gas meter 100 is closed. The DC-DC conversion circuit is realized through the circuit board 340.

[0020] In an embodiment, the wireless communication module 360 is a Bluetooth chip. The IO interface of the Bluetooth chip is electrically connected with the normally closed switch circuit. The Bluetooth chip outputs a level drive signal through the IO interface, thereby controlling the on-off of the normally closed switch circuit. The Bluetooth chip is a minimized low-power Bluetooth chip.

[0021] When the Bluetooth chip is used, the IO interface is connected with the normally closed switch circuit. When no signal is received, the IO port of the Bluetooth chip outputs a low-level drive signal, so that the normally closed switch circuit remains in the conductive state, and the intelligent battery normally supplies power to the electronic gas meter. The IO port of the Bluetooth chip outputs a high-level drive signal, thereby triggering the normally closed switch circuit to be disconnected, cutting off the power supply to the electronic gas meter, and closing the internal motor valve, thereby realizing the cutting off of the gas.

[0022] The minimized low-power Bluetooth chip can be selected, thereby reducing the power consumption of the battery.

[0023] The switch is directly driven through the IO port of the Bluetooth chip, the signal transmission delay is low, the transmission process is less than 10 ms, the valve closing response is rapid, the low-power Bluetooth chip reduces the power consumption, prolongs the endurance time of the intelligent battery 300, and the single charging lasts for 6-12 months; and the Bluetooth chip has strong compatibility and is easy to be linked with mainstream intelligent devices for expansion.

[0024] The old kitchen after the old community reconstruction, the electronic gas meter 100 is the old G2.5 type, the intelligent battery is provided with an nRF52832 low-power Bluetooth chip IO interface connected with a normally closed switch; the gas alarm 200 is integrated with a Bluetooth transmitting module and paired with the Bluetooth of the intelligent battery 300. When leakage is detected, the gas alarm 200 transmits a Bluetooth control signal, the IO port of the chip outputs a high level, and the power supply is cut off within 10 ms, and the gas meter 100 closes the valve; the low-power design makes the battery last for 8 months after single charging.

[0025] In an embodiment, the wireless communication module 360 comprises a radio frequency receiving module, and a signal output end of the radio frequency receiving module is electrically connected with the normally closed switch circuit.

[0026] The signal output end of the radio frequency receiving module is electrically connected with the normally closed switch circuit; when an external radio frequency format gas leakage linkage control signal is received, the output end generates a level change to drive the switch circuit to be disconnected and cut off the power supply.

[0027] The radio frequency signal has strong penetration and is suitable for large-scale or complex layout scenes, such as multi-storey shops, the electronic gas meter 100 is a commercial G4 type, the intelligent battery 300 is provided with a 315 MHz radio frequency receiving module, and the signal output end is connected with the switch circuit; the gas alarm 200 is matched with a 315 MHz radio frequency transmitting device and is arranged in the kitchen ceiling. When leakage occurs, the gas alarm 200 triggers a transmitting signal, the radio frequency receiving module receives the signal and cuts off the power supply within 0.5 s, the gas meter 100 closes the valve, and the signal has no attenuation after penetrating through a brick wall.

[0028] In an embodiment, the normally closed switch circuit is a normally closed electric coupling device, an input end of the normally closed electric coupling device is electrically connected with the wireless communication module 360, and an output end is connected in series between the DC-DC conversion circuit and the power supply end of the electronic gas meter 100. The normally closed electric coupling device keeps the output end conductive when no driving signal is received, and the output end is in an open circuit state when the driving signal is received.

[0029] The normally closed electronic switch circuit is a normally closed coupling device, the output end is electrically connected with the wireless communication module 360, and the output end is connected in series between the DC-DC conversion circuit and the power supply end of the gas meter 100; when no driving signal is received, the output end of the optocoupler is normally closed and conductive, and the power supply is normal; when the driving signal is received, the light-emitting tube in the optocoupler is lit, the output end is in an open circuit state, and the power supply is cut off.

[0030] The optical coupling realizes electrical isolation during the coupling period, avoids interference of the gas meter 100 circuit with the internal circuit of the smart battery 300, and improves stability.

[0031] In an embodiment, a charging interface 320, preferably a Type-c interface, is provided on the battery housing 310 and extends through the battery housing 310 to the inside thereof and is directly connected with the lithium battery.

[0032] The Type-c charging interface is provided on the battery housing and is directly connected with the lithium battery through the housing; when the lithium battery is insufficient, the charger is connected through the Type-c data line to directly charge the lithium battery without replacing the battery.

[0033] The lithium battery can be repeatedly charged through the Type-c data line, avoiding resource waste of disposable batteries and reducing use cost; the Type-c interface has strong compatibility and is convenient to use.

[0034] The kitchen of a rental house, the electronic gas meter 100 is a common household G1.6 type. The Type-c interface is provided on the side of the smart battery housing 310, and a 2000mAh lithium battery is built-in; when the gas meter 100 displays low battery, the user connects the Type-c interface with the mobile phone charger to charge, and it takes 4 hours to be fully charged; a single charge can be used for 6 months, avoiding frequent replacement of the battery.

[0035] In an embodiment, the input voltage of the DC-DC conversion circuit is adapted to the standard voltage of the lithium battery, the fluctuation range of the output voltage is less than ±0.05V, and the output power is greater than 100mA.

[0036] The input of the DC-DC conversion circuit is adapted to the standard voltage of the lithium battery, the output voltage fluctuation is ≤±0.05V, and the output current is greater than 100mA; it ensures that the gas meter 100 obtains stable and sufficient power supply in the whole cycle of lithium battery charging and discharging. The voltage fluctuation is very small, avoiding the measurement error of the gas meter due to unstable power supply, and the output current is sufficient to adapt to the multi-load working conditions of the gas meter 100 motor valve, display screen, etc.

[0037] In an embodiment, when the normally closed switch circuit is restored to conduction and the smart battery 300 recharges the electronic gas meter 100, the electronic gas meter 100 remains in the valve-closed state; by continuously pressing the physical button on the electronic gas meter 100 for a predetermined time, the electronic gas meter 100 is released from the valve-closed state.

[0038] After the normally closed switch circuit is restored to conduction, the smart battery 300 recharges, but the gas meter 100 remains in the valve-closed state; the physical button on the gas meter 100 needs to be continuously pressed for a predetermined time of 4 seconds to trigger the internal reset of the gas meter 100 and release the valve-closed state.

[0039] After power recovery, keep the valve closed to avoid potential leakage, and automatically restore gas supply when the leakage risk is eliminated, improving safety; physical button triggers reset, intuitive operation, prevents accidental touch by children or automatic false recovery, filters accidental touch by pressing for a preset duration, ensuring effective reset operation. In a family with children, the kitchen electronic gas meter 100 is the JYT-2.5 model with a physical reset button. When the hose leaks, the intelligent battery 300 triggers power off to close the valve. After repairing and closing the switch, the gas meter 100 still keeps the valve closed. Parents press the reset button of the gas meter 100 for 4 seconds, and the valve opens after hearing the sound. Children cannot reset within 1 second, avoiding the risk of accidental touch.

[0040] A gas leakage alarm and gas cutoff linkage system includes a gas alarm 200, a gas detection sensor and a relay are built-in the gas alarm 200, the contact of the relay is a normally open contact, the gas alarm 200 controls the normally open contact of the relay to be attracted when detecting gas leakage through the gas detection sensor; A wireless signal emitting device, the signal trigger end of the wireless signal emitting device is electrically connected with the normally open contact of the relay, the wireless signal emitting device emits a gas leakage linkage control signal when the normally open contact of the wireless signal emitting device is attracted; An intelligent battery 300 is detachably installed in the battery compartment 110 of the electronic gas meter 100, providing power for the gas meter 100; The electronic gas meter 100 has a power failure automatic shutdown function, and an internal power supply interface compatible with the intelligent battery 300; The wireless signal emitting device and the wireless communication module 360 of the intelligent battery 300 are signal matched, and the wireless communication module 360 of the intelligent battery 300 receives the gas leakage linkage control signal to control the normally closed switch circuit to be disconnected, interrupting the power supply to the electronic gas meter 100, and triggering the electronic gas meter 100 to automatically shut down the valve.

[0041] The system is composed of a gas alarm 200, a wireless signal emitting device, an intelligent battery 300, and an electronic gas meter 100: the gas alarm 200 monitors the gas concentration through the detection sensor and controls the built-in normally open relay to be attracted when the concentration exceeds the standard; the relay attraction triggers the wireless signal emitting device to emit a linkage control signal; the intelligent battery 300 cuts off the power supply after receiving the signal, and the electronic gas meter 100 with the power failure valve automatically closes the valve. Full-link automation, from detection to valve closure without human intervention, response time ≤3 seconds, and wireless transmission eliminates wiring restrictions, flexible installation, suitable for new decoration or old kitchen.

[0042] In the newly built commercial housing kitchen, a gas alarm 200 with a catalytic combustion sensor, a Bluetooth transmission module, an intelligent battery 300, and a G2.5 type electronic gas meter 100 with a power-off valve are configured. When the gas alarm 200 detects that the concentration of natural gas reaches 0.1%, the relay is attracted to trigger the Bluetooth transmission module to send a signal, the intelligent battery 300 is powered off within 10ms, and the gas meter 100 is closed within 2 seconds. The whole process is operated without manual operation.

[0043] In an embodiment, the wireless signal transmission device is any one of an infrared remote control, a Bluetooth transmission module, or a radio frequency transmission module. When the wireless signal transmission device is a Bluetooth transmission module, it is paired with the Bluetooth chip of the intelligent battery 300.

[0044] The wireless signal transmission device can be selected from an infrared remote control, a Bluetooth transmission module, or a radio frequency transmission module. If it is a Bluetooth transmission module, it needs to be paired with the Bluetooth chip of the intelligent battery 300 to ensure that the signal is matched only.

[0045] Multiple types of transmission devices are suitable for different scenarios: infrared is suitable for short distances without obstruction, Bluetooth is suitable for medium distances with intelligent linkage, and radio frequency is suitable for long distances with obstruction; Bluetooth pairing ensures signal exclusivity, avoiding interference between different households. It can be flexibly selected according to cost and scene, and the system compatibility is more extensive.

[0046] The villa kitchen area is 50 square meters, with cabinets blocking, and a radio frequency transmission module 433MHz is selected; a common apartment kitchen 10 square meters without obstruction selects an infrared transmission module; an intelligent home linkage scene selects a Bluetooth transmission module, which only receives signals from the system after pairing with the Bluetooth of the intelligent battery 300, avoiding interference from neighbor systems.

[0047] In an embodiment, the gas alarm 200 further comprises an audible and visual alarm unit connected with the gas detection sensor signal.

[0048] The gas alarm 200 is additionally provided with an audible and visual alarm unit connected with the detection sensor signal; when the sensor detects gas leakage, the audible and visual alarm unit is simultaneously started, emitting a sound ≥85dB and a red flashing light alarm.

[0049] Among them, the dual alarm of sound and light takes into account the elderly and the visually and hearing impaired, improving the recognition of the alarm; the alarm is synchronized with the valve closing, reminding users to investigate hidden dangers and avoiding closing the valve without noticing the leakage; high decibel sound and flashing light can still effectively alert in noisy environments such as cooking. The gas alarm 200 for the kitchen of the elderly and hearing-impaired people is equipped with an 85dB buzzer and a red LED light. When there is a leak, the system triggers the valve closing at the same time, the buzzer continues to sound, and the LED light flashes 2 times per second; after the elderly hear the sound and the hearing-impaired see the light, they can promptly investigate the leakage point, improving the adaptability of the scene.

[0050] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A device that uses a smart battery to link gas leak alarm with gas meter shut-off, characterized in that: Includes a smart battery, which is used in conjunction with an electronic gas meter that has an automatic valve shut-off function when power is lost, to trigger a gas shut-off linkage after a gas leak. The smart battery includes: a battery housing, and a lithium battery disposed within the housing for providing initial electrical energy. A DC-DC converter circuit, located inside the battery casing and connected to the lithium battery, is used to convert the voltage output by the lithium battery into a preset voltage. The wireless communication module, located inside the battery casing, is used to receive external gas leak linkage control signals. A normally closed electronic switch circuit is connected in series in the output circuit of the DC-DC converter circuit; The normally closed switch circuit remains on when the wireless communication module does not receive an external gas leak linkage signal. When the wireless communication module receives an external control signal, it drives the normally closed electronic switch circuit to open, thereby cutting off the external output voltage of the smart battery.

2. A device for linking gas leak alarm and gas meter shut-off using a smart battery according to claim 1, characterized in that: The wireless communication module is a Bluetooth chip. The I / O interface of the Bluetooth chip is electrically connected to a normally closed switch circuit. The Bluetooth chip outputs a high-level drive signal through the I / O interface to control the on / off state of the normally closed switch circuit. The Bluetooth chip is a low-power Bluetooth chip with a minimized package.

3. A device for linking gas leak alarm and gas meter shut-off using a smart battery according to claim 2, characterized in that: The wireless communication module includes a radio frequency (RF) receiver module, and the signal output terminal of the RF receiver module is electrically connected to a normally closed switching circuit.

4. A device for linking gas leak alarm and gas meter shut-off using a smart battery according to any one of claims 1-3, characterized in that: The normally closed switching circuit is a normally closed electrocoupler. The input terminal of the normally closed electrocoupler is electrically connected to the wireless communication module, and the output terminal is connected in series between the DC-DC conversion circuit and the power supply terminal of the electronic gas meter. Normally closed electrocouplers maintain a conducting output when no drive signal is received; when a drive signal is received, the output is open.

5. A device for linking gas leak alarm and gas meter shut-off using a smart battery according to claim 1, characterized in that: The battery casing has a charging interface, a Type-C interface, which extends through the battery casing and is directly connected to the lithium battery.

6. A device for linking gas leak alarm and gas meter shut-off using a smart battery according to claim 5, characterized in that: The input voltage of the DC-DC conversion circuit is adapted to the standard voltage of the lithium battery, the output voltage fluctuation range is less than ±0.05V, and the output power is greater than 100mA.

7. A device for linking gas leak alarm and gas meter shut-off using a smart battery according to claim 5, characterized in that: When the normally closed switch circuit is turned on again and the smart battery resumes power supply to the electronic gas meter, the electronic gas meter remains in the closed valve state; by continuously pressing the physical button on the electronic gas meter for a preset time, the electronic gas meter releases the closed valve state.

8. A gas leak alarm and gas shut-off linkage system, characterized in that, include: A gas alarm, wherein the gas alarm has a built-in gas detection sensor and a relay. The relay has normally open contacts. When the gas alarm detects a gas leak through the gas detection sensor, it controls the normally open contacts of the relay to close. The wireless signal transmitter has its signal trigger terminal electrically connected to the normally open contact of the relay. When the normally open contact of the wireless signal transmitter is closed, it transmits a gas leak linkage control signal. The smart battery is detachably installed in the battery compartment of the electronic gas meter to power the gas meter; The electronic gas meter has an automatic shut-off function when power is lost, and has an internal power supply interface that is compatible with smart batteries; Among them, the wireless signal transmitter and the wireless communication module of the smart battery are matched. After the wireless communication module of the smart battery receives the gas leak linkage control signal, it controls the normally closed switch circuit to open, interrupting the power supply to the electronic gas meter. The electronic gas meter triggers the automatic valve shut-off when the power is lost.

9. The gas leak alarm and gas shut-off linkage system according to claim 8, characterized in that: The wireless signal transmitting device includes: a Bluetooth transmitting module operating in the 2.4GHz frequency band; Radio frequency transmission modules operating in the 315MHz or 433MHz frequency band; Infrared remote control.

10. The gas leak alarm and gas shut-off linkage system according to claim 9, characterized in that: The gas alarm also includes an audible and visual alarm unit, which is connected to the gas detection sensor signal.

Images