Fire early warning device

Abstract

A fire early warning device belongs to the technical field of alarm devices. The fire early warning device comprises a detection unit and is characterized in that the detection unit comprises a first air pipe type detector laid along the bottom face of a power socket, the first air pipe type detector comprises a first air pipe and a first piston, the first end of the first air pipe is closed, and the second end of the first air pipe is communicated with the outside; the first piston is arranged near the second end in the first air pipe, and a cavity between the first piston and the first end of the first air pipe is filled with air with set mass; the second end of the first air pipe is provided with a first piston position detector. The device is simple in structure and low in cost.

Description

Technical Field

[0001] The invention relates to a fire warning device, belonging to the technical field of fire protection. Background Art

[0002] According to statistics, the majority of fires in homes and offices are caused by electrical outlets. Homes and offices are heavily populated with power outlets, which are connected to a variety of electrical devices. The main causes of fires include: leaving a charger plugged in for extended periods, which can cause internal short circuits; high-power appliances causing heat buildup in the outlets; randomly connecting outlets and leaving them powered on for extended periods; and leaving mobile phones charging overnight, which can cause thermal runaway of lithium batteries.

[0003] In order to solve the above problems, there are various fire alarm devices in the prior art. The fire alarm devices in the prior art have complex structures and high costs. Summary of the Invention

[0004] In order to solve the above technical problems, the object of the present invention is to provide a fire warning device which has a simple structure, low cost and can be widely used.

[0005] To achieve the aforementioned object of the invention, the present invention provides a fire warning device, which includes a detection unit, the detection unit including: a first air tube type detector laid along the bottom surface of the power socket, the first air tube type detector including a first air tube and a first piston, the first end of the first air tube is sealed, and the second end is connected to the outside world, the first piston is arranged near the second end of the first air tube, and the cavity between the first piston and the first end of the first air tube is filled with a set mass of air; a temperature converter is arranged at the second end of the first air tube, and the temperature converter is used to convert the temperature of the power socket into a first induced voltage.

[0006] Preferably, the temperature converter includes a first return spring, a first mounting plate, a first U-shaped magnet, a first support frame and a first induction voltage detector, wherein the first mounting plate is mounted on one end of the first U-shaped magnet and a through hole is provided in the center thereof; the first support frame is axially arranged vertically on the first end face of the first piston and passes through the first through hole; the first support frame is circumferentially wound with a first coil, and the first coil is placed in the magnetic field formed by the first U-shaped magnet; both ends of the first coil are connected to the first induction voltage detector, and the first induction voltage detector is used to detect the first induced voltage induced by the first coil; one end of the first return spring is connected to the first piston, and the other end is connected to the first mounting plate.

[0007] Preferably, the fire warning device further includes a processor, the processor including a probability estimation model, the probability estimation model obtaining the probability of fire occurrence based on the induced voltage of the first coil obtained by the first induced voltage detector and its duration.

[0008] Preferably, the detection unit also includes: a second air tube type detector away from the power socket and arranged on the wall of the accommodating cavity of the power socket, the second air tube type detector includes a second air tube and a second piston, wherein the first end of the second air tube is sealed and the second end is open, the second piston is arranged near the second end in the second air tube, and the cavity between the second piston and the first end of the second air tube is filled with a set mass of air; an air pressure converter is provided at the first end of the second air tube, and the air pressure converter is used to convert the air pressure of the accommodating cavity of the power socket into a second induced voltage.

[0009] Preferably, the air pressure converter includes a second return spring, a second mounting plate, a second U-shaped magnet, a second support frame and a second induction voltage detector, wherein the second mounting plate is mounted on one end of the second U-shaped magnet and a through hole is provided in the center thereof; the second support frame is axially arranged vertically on the second end face of the second piston and passes through the second through hole; the second support frame is circumferentially wound with a second coil, and the second coil is placed in the magnetic field formed by the second U-shaped magnet; both ends of the second coil are connected to the second induction voltage detector, and the second induction voltage detector is used to detect the second induced voltage induced by the second coil; one end of the second return spring is connected to the second piston, and the other end is connected to the second mounting plate.

[0010] Preferably, the processor also includes a fire extinguishing agent combustion degree estimation model, which obtains the combustion degree of the fire extinguishing agent set in the accommodating cavity of the power socket based on the induced voltage of the second coil obtained by the second induced voltage detector and its duration.

[0011] Compared with the prior art, the fire warning device provided by the present invention has a simple structure, low cost, and can be widely used. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the composition of the fire extinguishing early warning system provided by the present invention.

[0013] Figure 2 This is a block diagram of the fire warning device provided by the present invention.

[0014] Figure 3 It is a schematic diagram of the composition of the first air tube detector provided by the present invention.

[0015] Figure 4 It is a schematic diagram of the composition of the second air tube detector provided by the present invention. DETAILED DESCRIPTION

[0016] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0017] Figure 1 FIG. 1 is a schematic diagram of the composition of the fire extinguishing warning system provided by the first embodiment of the present invention. Figure 1 As shown, the fire extinguishing warning system provided in the first embodiment includes multiple fire warning devices and multiple smoke detectors. The fire warning devices include, for example, fire warning device 1, ..., fire warning device K, where K is greater than or equal to 1; and the smoke detectors include, for example, smoke detector 1, ..., smoke detector P, where P is greater than or equal to 1. The fire warning devices are installed in the accommodating cavity of the charging socket, and the smoke detectors are located in the monitored area. Both the fire warning devices and the smoke detectors include communication units, enabling communication via a wireless network, preferably a 5G network. The data of the fire warning devices is determined by the number of charging sockets to be protected; the number of smoke detectors to be installed is determined by installation conditions such as the area of ​​the monitored area.

[0018] Figure 2 FIG. 1 is a block diagram of a fire warning device according to a first embodiment of the present invention. Figure 2 As shown, the fire warning device provided by the first embodiment of the present invention includes a detection unit, a processor and a communication unit, the detection unit includes a first air tube detector and a second air tube detector, the first air tube detector is used to detect the temperature of the power socket, and the second air tube detector is used to detect the gas pressure in the power socket accommodating cavity; the processor includes a probability estimation model and a fire extinguishing agent combustion degree estimation model, the probability estimation model obtains the probability of fire occurrence according to the temperature of the power socket; the fire extinguishing agent combustion degree estimation model estimates the combustion degree of the fire extinguishing agent set in the accommodating cavity of the power socket according to the gas pressure in the accommodating cavity of the power socket.

[0019] The processor also includes a first comparison module, which is used to compare the probability of fire with a first threshold. When the probability of fire is greater than or equal to the first threshold, the processor sends an instruction to change the sensitivity to the smoke detector through the communication unit. When the smoke detector receives the instruction to change the sensitivity from the fire warning device, it lowers the light threshold for judging a fire, thereby increasing the sensitivity.

[0020] In the present invention, the fire warning device also includes an ignition unit and a fire extinguishing agent box. The ignition unit includes an ignitable heat-sensitive wire, the first end of the ignitable heat-sensitive wire is in contact with the bottom surface of the power socket, and the second end is in contact with the fire extinguishing agent in the fire extinguishing agent box; the first comparison module is also used to compare the probability of fire with a second threshold value. When the probability is greater than or equal to the second threshold value, the control unit controls the ignition unit to ignite the fire extinguishing agent in the fire extinguishing agent box to generate fire extinguishing gas, and the second threshold value is greater than the first threshold value.

[0021] In the present invention, the processor transmits the probability of fire occurrence to a remote terminal via a communication unit. The remote terminal may be, for example, a user's handheld terminal, which has an application installed on it that is paired with the fire warning device. The user can use the application to keep track of the probability of fire occurring in the space where the fire warning device is located.

[0022] In the present invention, the fire extinguishing agent comprises at least an aerosol fire extinguishing agent. This aerosol fire extinguishing agent uses food-grade raw materials and is safe and harmless to humans. The aerosol fire extinguishing agent's fire extinguishing principle is as follows: Ionic potassium oxide released by the aerosol fire extinguishing agent has a universally uniform effect, achieving full flooding coverage of the entire protected area. Upon contact with the fire source, it combines with flame free radicals, repeatedly interrupting the flame free radical reaction chain to form stable non-combustible products, ultimately interrupting the flame chain and achieving the purpose of extinguishing the fire without depleting the ambient oxygen content. The gas released by the aerosol fire extinguishing agent can remain suspended in the protected room or enclosure for at least 30 minutes, effectively and continuously suppressing the spread or re-ignition of the fire.

[0023] This safe, non-toxic aerosol fire extinguisher can handle Class A (solid material fires), Class B (liquid or soluble solid material fires), Class C (gas fires), Class E (electrical fires), and Class F (cooked items in cooking appliances). This safe, non-toxic aerosol fire extinguisher can be stored in a temperature range of -60 to +160°C, is resistant to vibration and turbulence, and is stored in a solid state. It activates when temperatures exceed 410°C, converting from solid to gaseous, making it suitable for use as a small, automatic fire extinguisher.

[0024] In the present invention, the detection unit includes: a first air tube detector laid along the bottom surface of the power socket.

[0025] Figure 3 Schematic diagram of the composition of the first air tube detector provided by the present invention, such as Figure 3As shown, a first air tube detector is laid along the bottom surface of the power socket. The first air tube detector includes a first air tube 21 and a first piston 22. The first end of the first air tube is sealed, and the second end is connected to the outside through a through hole 30. The first piston is arranged near the second end of the first air tube, and the cavity 23 between the first piston and the first end of the first air tube is filled with a set mass of air; a temperature converter is provided at the second end of the first air tube, and the temperature converter is used to convert the temperature of the power socket into a first induced voltage.

[0026] In the present invention, the temperature converter includes a first return spring 24, a first mounting plate 20, a first U-shaped magnet 19, a first support frame 26, and a first induction voltage detector 19. The first mounting plate is mounted on one end of the first U-shaped magnet and has a central through-hole. The first support frame is axially perpendicular to the first end surface of the first piston and extends through the first through-hole. A first coil 25 is circumferentially wound around the first support frame, and the first coil is placed within the magnetic field formed by the first U-shaped magnet. The first coil's two ends 25a and 25b are connected to the first induction voltage detector, which is used to detect the first induced voltage induced by the first coil. One end of the first return spring is connected to the first piston, and the other end is connected to the first mounting plate.

[0027] The first air tube type detector for checking the temperature of the power socket is designed according to the following gas law: T= PV / C, where T is the gas temperature, V is the gas volume, P is the gas pressure, and C is a constant. When the object that the first air tube contacts, such as the power socket, becomes hot, the air pressure in the first air tube increases, and the pressure of the gas in the space where the first air tube is located also increases due to the heat emitted by the hot power socket. However, since the air pressure in the first air tube is high and the pressure of the gas in the space where the first air tube is located is low, the air in the first air tube pushes the first piston to move in a first direction. The first direction is, for example, from left to right. The displacement of the first piston is related to the temperature of the hot power socket. The higher the temperature of the hot power socket, the greater the displacement of the first piston in the first direction. Therefore, the temperature of the hot power socket can be determined based on the displacement of the first piston in the first direction. The first piston moves in the first direction ( Figure 3 The first coil, carried by the first support frame connected to the first piston, cuts the magnetic lines of force generated by the first U-shaped magnet, generating a first induced voltage of a first polarity in the first coil. This induced voltage is detected by a first induced voltage detector, thereby converting changes in the power outlet temperature into changes in the induced voltage. Simultaneously, the first piston compresses the first return spring.

[0028] The processor includes a probability estimation model, which estimates the probability of a fire occurring in the power socket according to the first induced voltage and the duration of the first induced voltage.

[0029] When the temperature of the power socket decreases, the first return spring stretches, and the first piston moves in the second direction ( Figure 3 The first support frame connected to the first piston carries the first coil thereon to cut the magnetic lines of force generated by the first U-shaped magnet, thereby generating a first induced voltage of a second polarity on the first coil. The first induced voltage of the second polarity is detected by the first induced voltage detector, thereby converting the change in the temperature of the power socket into a change in the induced voltage.

[0030] In the first embodiment, the detection unit includes: a second air tube type detector arranged away from the power socket.

[0031] Figure 4 FIG. 1 is a schematic diagram of the composition of the second air tube detector provided by the first embodiment of the present invention, as shown in FIG. Figure 4 As shown, a second air tube type detector is provided away from the power socket and on the wall of the accommodating cavity of the power socket. The second air tube type detector includes a second air tube 31 and a second piston 32, wherein the first end of the second air tube is sealed and the second end is open, the second piston is provided near the second end in the second air tube, and the cavity between the second piston and the first end of the second air tube is filled with a set mass of air; an air pressure converter is provided at the first end of the second air tube, and the air pressure converter is used to convert the air pressure of the accommodating cavity of the power socket into a second induced voltage.

[0032] In the first embodiment, the air pressure converter includes a second return spring 34, a second mounting plate 38, a second U-shaped magnet 39, a second support frame 36 and a second induction voltage detector 40, wherein the second mounting plate is mounted on one end of the second U-shaped magnet and has a through hole in the center; the second support frame is axially arranged vertically on the second end face of the second piston and passes through the second through hole; the second support frame is circumferentially wound with a second coil 35, and the second coil is placed in the magnetic field formed by the second U-shaped magnet; the two ends 35a and 35b of the second coil are connected to the second induction voltage detector, and the second induction voltage detector is used to detect the voltage induced by the second coil; one end of the second return spring is connected to the second piston, and the other end is connected to the second mounting plate.

[0033] In the second embodiment, the processor further includes a second probability estimation model, which obtains the probability of the fire extinguishing agent in the accommodating cavity of the power socket being ignited based on the second induced voltage of the second coil obtained by the second induced voltage detector and the duration of the second induced voltage.

[0034] The second air tube detector checks the gas pressure in the space where it is located and is designed based on the principle of the gas state equation. When the fire extinguishing agent in the fire extinguishing agent container is ignited, a large amount of gas is generated, and the gas pressure in the space where the fire warning device is located increases, which is greater than the pressure of the gas in the second air tube. The gas in the space where the fire warning device is located pushes the second piston to run in the second direction. The second direction is from right to left, for example, and its displacement is related to the gas pressure in the space where the fire warning device is located. The higher the gas pressure in the space where the fire warning device is located, the greater the displacement of the second piston in the second direction. Therefore, the gas pressure in the space where the fire warning device is located can be determined based on the displacement of the second piston in the second direction. The first piston moves in the first direction ( Figure 4 The second support frame, connected to the second piston, carries a second coil thereon, which cuts the magnetic lines of force generated by the second U-shaped magnet, generating a second induced voltage of the first polarity in the second coil. This first induced voltage of the first polarity is detected by the second induced voltage detector, thereby converting changes in the gas pressure in the space where the fire warning device is located into changes in the induced voltage. Simultaneously, the second piston compresses the second return spring.

[0035] The fire extinguishing agent combustion degree estimation model obtains the combustion degree of the fire extinguishing agent disposed in the receiving cavity of the power socket according to the induced voltage of the second coil obtained by the second induced voltage detector and its duration.

[0036] When the ignition agent in the ignition agent box is burned out, the second return spring stretches, and the first piston moves in the second direction ( Figure 4 The second support frame connected to the second piston carries the second coil thereon, cutting the magnetic lines of force generated by the second U-shaped magnet, thereby generating a second induced voltage of a second polarity on the second coil. The second induced voltage of the second polarity is detected by a second induced voltage detector, thereby converting the change in gas pressure in the space where the fire warning device is located into a change in the induced voltage.

[0037] The first embodiment further provides a fire alarm method, which includes: S01: The probability of fire occurrence estimated by the receiving probability estimation model; S02: Determine whether the probability of a fire is greater than or equal to the first threshold; if so, execute step S03; if not, return to step S01; S03: Send the probability value of fire to the remote terminal and send a sensitivity change instruction to the smoke detector. The remote terminal determines whether to turn off the main switch or escape based on the received probability value. The smoke detector changes its sensitivity according to the received instruction. S04: Continue to receive the probability of fire occurrence from the probability estimation model; S05: Determine whether the probability of fire is greater than or equal to a second threshold; if so, execute step S06; if not, return to step S04; S06: The ignition unit ignites the fire extinguishing agent in the fire extinguishing agent box; S07: receiving the fire extinguishing agent combustion degree estimation model provided in the accommodating cavity of the power socket combustion degree of the fire extinguishing agent; S08: Determine whether the fire extinguishing agent has been ignited. If so, end; if not, return to step S06.

[0038] Next, we'll describe the steps involved in the smoke detector process. The smoke detector periodically detects incoming smoke using a smoke sensing unit. During detection, it monitors the presence of smoke based on a set light threshold of a photoelectric element. Then, when the scattered light based on the smoke concentration exceeds the light threshold (equivalent to the smoke threshold), it determines a fire. If the smoke concentration exceeds the smoke threshold and a fire is determined, the smoke detector outputs a fire signal to a remote terminal via the communication unit as part of the fire process. If a fire is not confirmed, the detector determines whether a sensitivity change notification has been received from the fire warning device. If no sensitivity change notification has been received, the detector returns to smoke detection. If a sensitivity change notification has been received, the detector adjusts the sensitivity.

[0039] The fire warning device provided by the first embodiment of the present invention, even if it detects a change exceeding a first threshold due to weather conditions, air conditioners, or the like, will not issue a fire alarm unless the smoke detector, having switched to a high-sensitivity state, detects smoke. This reduces the risk of non-fire notifications. Furthermore, the smoke detector's high-sensitivity fire notification is limited to situations where the probability of fire detected by the first air duct detector exceeds the first threshold, resulting in a sensitivity change notification. This also reduces the risk of non-fire notifications due to tobacco smoke, etc.

[0040] Alternatively, the detection unit may be a thermocouple, thermal semiconductor, or electronic cable type. In the thermocouple type, the electromotive force generated by a thermocouple installed on the surface of a heating power outlet is measured to detect a fire. If the electromotive force exceeds a third threshold, a sensitivity change notification is sent to the smoke detector. If it exceeds a fourth threshold, a fire alarm is generated through fire detection. The same principle applies to thermal semiconductors that detect changes in resistance and electronic cable types that use an electronic cable equipped with a temperature sensor.

[0041] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined. "Several" means one or more, unless otherwise specifically defined.

[0042] The terms "left", "right", "up", "down", etc. only refer to the left, right, up and down of components in the drawings, and will change according to the installation angle in actual application.

[0043] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire warning device, comprising a detection unit, characterized in that: The detection unit includes: a first air tube detector laid along the bottom surface of the power socket, the first air tube detector including a first air tube and a first piston, the first end of the first air tube is sealed, and the second end is connected to the outside world, the first piston is arranged near the second end of the first air tube, and the cavity between the first piston and the first end of the first air tube is filled with a set mass of air; a temperature converter is arranged at the second end of the first air tube, and the temperature converter is used to convert the temperature of the power socket into a first induced voltage.

2. The fire warning device according to claim 1, characterized in that: The temperature converter includes a first return spring, a first mounting plate, a first U-shaped magnet, a first support frame and a first induction voltage detector, wherein the first mounting plate is mounted on one end of the first U-shaped magnet and a through hole is provided in the center thereof; the first support frame is axially arranged vertically on the first end face of the first piston and passes through the first through hole; the first support frame is circumferentially wound with a first coil, and the first coil is placed in the magnetic field formed by the first U-shaped magnet; both ends of the first coil are connected to the first induction voltage detector, and the first induction voltage detector is used to detect the first induced voltage induced by the first coil; one end of the first return spring is connected to the first piston, and the other end is connected to the first mounting plate.

3. The fire warning device according to claim 2, characterized in that: The system further includes a processor, which includes a probability estimation model. The probability estimation model obtains the probability of fire occurrence based on the induced voltage of the first coil obtained by the first induced voltage detector and its duration.

4. The fire warning device according to claim 3, characterized in that: The detection unit also includes: a second air tube type detector away from the power socket and arranged on the wall of the accommodating cavity of the power socket, the second air tube type detector includes a second air tube and a second piston, wherein the first end of the second air tube is sealed and the second end is open, the second piston is arranged near the second end in the second air tube, and the cavity between the second piston and the first end of the second air tube is filled with a set mass of air; an air pressure converter is arranged at the first end of the second air tube, and the air pressure converter is used to convert the air pressure of the accommodating cavity of the power socket into a second induced voltage.

5. The fire warning device according to claim 4, characterized in that: The air pressure converter includes a second return spring, a second mounting plate, a second U-shaped magnet, a second support frame and a second induction voltage detector, wherein the second mounting plate is mounted on one end of the second U-shaped magnet and a through hole is provided in the center thereof; the second support frame is axially arranged vertically on the second end face of the second piston and passes through the second through hole; the second support frame is circumferentially wound with a second coil, and the second coil is placed in the magnetic field formed by the second U-shaped magnet; both ends of the second coil are connected to the second induction voltage detector, and the second induction voltage detector is used to detect the second induced voltage induced by the second coil; one end of the second return spring is connected to the second piston, and the other end is connected to the second mounting plate.

6. The fire warning device according to claim 5, characterized in that: The processor also includes a fire extinguishing agent combustion degree estimation model, which obtains the combustion degree of the fire extinguishing agent set in the accommodating cavity of the power socket based on the induced voltage of the second coil obtained by the second induced voltage detector and its duration.

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