An electronic fire extinguishing bomb with temperature control
By introducing a temperature-sensing control circuit into the electronic fire extinguishing bomb, and using a thermistor and ignition control chip to determine the ambient temperature, the problems of accidental detonation and premature detonation are solved, and a safe and reliable automatic triggering fire extinguishing function is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- DEZHOU KUNCHENG ELECTRONIC TECH CO LTD
- Filing Date
- 2025-05-13
- Publication Date
- 2026-07-31
AI Technical Summary
Existing electronic fire extinguishing bombs are prone to accidental or premature detonation due to improper operation, posing a safety hazard.
The circuit employs a temperature-sensing control circuit, which uses a thermistor to detect the external ambient temperature. The ignition control chip determines whether to trigger the ignition signal based on the temperature threshold. The circuit design includes a combination of a safety pin, a thermistor, an ignition control chip, and a MOSFET.
It enables automatic triggering of ignition signals based on ambient temperature, increasing the safety of electronic fire extinguishing bombs, avoiding accidental and premature detonation, and improving operational reliability.
Smart Images
Figure CN224573139U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic fire extinguishing bomb technology, and in particular to an electronic fire extinguishing bomb with temperature sensing control. Background Technology
[0002] Electronic fire extinguishing bombs typically consist of an electronic control module, extinguishing material (such as dry powder), and a fracturing unit (such as a pyrotechnic device or gas generator). An ignition head (transducer element, such as an ignition resistor) is embedded within the extinguishing material. Upon receiving an external ignition signal, the electronic control module controls the transducer element to release heat energy, igniting the fracturing unit and rapidly causing the fire extinguishing bomb to break apart and release the extinguishing material to complete the fire extinguishing mission. Currently, ignition signals are generally sent to the electronic control module via manual triggering or delayed timing, which can easily lead to accidental or premature detonation due to improper operation, resulting in casualties. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide an electronic fire extinguishing bomb with temperature sensing control, which can determine whether to trigger a fire signal based on external ambient temperature information.
[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: an electronic fire extinguishing bomb with temperature sensing control, including a control circuit, the control circuit including an electronic control module, the electronic control module including an ignition control chip U1 that outputs a FIRE ignition signal, the control circuit also including a safety pin and a thermistor R1, the negative terminal of the power supply U2 is grounded, the positive terminal of the power supply U2 is connected to one end of the safety pin, the other end of the safety pin is connected in series with the resistor R2 and the thermistor R1 and then grounded, the other end of the safety pin is led out and connected to the positive terminal of a 3.3V power supply; one end of the resistor R2 and the thermistor R1 is connected to the RB4 pin of the ignition control chip U1; the Vcc pin of the ignition control chip U1 is connected to the positive terminal of the 3.3V power supply, and the Gnd pin of the ignition control chip U1 is grounded; a capacitor C3 is connected between the Vcc pin and the Gnd pin of the ignition control chip U1, and the FIRE ignition signal is led out from the RB3 pin of the ignition control chip U1.
[0005] Preferably, the FIRE signal is connected to the gate (G) of MOSFET Q3 via a series resistor R7, the drain (D) of MOSFET Q3 is connected to the gate (G) of MOSFET Q4 via a series resistor R4, the source (S) of MOSFET Q3 is grounded, the drain of MOSFET Q4 is connected to the transducer R3 via a series connection and then grounded, the source of MOSFET Q4 is connected to the cathode of diode D1 via a series resistor R6, the anode of diode D1 is connected to the positive terminal of a 3.3V power supply, the source of MOSFET Q4 is connected to the anode of electrolytic capacitor C1, and the cathode of electrolytic capacitor C1 is grounded.
[0006] Preferably, one end of resistor R8 is connected to the gate of MOSFET Q3, and the other end of resistor R8 is grounded.
[0007] Preferably, one end of resistor R5 is connected to the gate (G) of MOSFET Q4, and the other end of resistor R5 is connected to the drain (D) of MOSFET Q4.
[0008] Preferably, the thermistor R1 is mounted on the surface of the outer shell of the electronic fire extinguishing bomb, and the thermistor R1 is in contact with the external environment.
[0009] Preferably, the electronic fire extinguishing bomb includes multiple thermistors R1 connected in parallel, and the multiple thermistors R1 are distributed around the surface of the outer shell of the electronic fire extinguishing bomb.
[0010] Preferably, the outer shell of the electronic fire extinguishing bomb is filled with fire extinguishing material, which contains fracturing units. The transducer R3 is used to activate the fracturing units, and the transducer R3 releases heat to activate the fracturing units to explode and disperse the fire extinguishing material.
[0011] The beneficial effects of this invention are as follows: The electronic fire extinguishing grenade of this invention includes a safety pin and a thermistor R1. When the safety pin is pulled out, the power supply U2 is connected to the circuit, causing resistor R2 and the thermistor R1 to be connected to the circuit and charging capacitor C3. When the external ambient temperature rises, the resistance of the thermistor R1 increases. When the measured temperature reaches a set threshold, the ignition control chip U1 outputs a FIRE signal. This electronic fire extinguishing grenade can determine whether to trigger the ignition signal based on external ambient temperature information. This invention adds an extra layer of safety to the operation of the electronic fire extinguishing grenade by determining whether to trigger the ignition signal based on external ambient temperature information. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of the electronic fire extinguishing bomb of this utility model;
[0013] Figure 2 This is a circuit diagram of the control circuit of the electronic fire extinguishing bomb of this utility model. Detailed Implementation
[0014] The present invention will now be described in further detail with reference to the accompanying drawings and preferred embodiments. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.
[0015] like Figure 1As shown, an electronic fire extinguishing grenade with temperature-sensing control includes a control circuit. The control circuit includes an electronic control module, a safety pin, and multiple thermistors R1. The multiple thermistors R1 are connected in parallel and distributed around the surface of the grenade's outer shell. The thermistors R1 are in contact with the external environment to collect ambient temperature signals; for example, when the ambient temperature rises, the resistance of the thermistors R1 increases accordingly. The outer shell of the electronic fire extinguishing grenade is filled with fire extinguishing material containing fracturing units. A transducer R3 (a component that converts electrical energy into heat energy, such as an ignition resistor) is used to activate the fracturing units. In an optional embodiment, the transducer R3 is embedded inside the fracturing units, and the transducer R3 releases heat to activate the fracturing units, causing them to explode and disperse the fire extinguishing material.
[0016] like Figure 2 As shown, a control circuit for an electronic fire extinguishing grenade with temperature sensing control is provided. The electronic control module includes an ignition control chip U1 that outputs a FIRE signal. The negative terminal of a power supply U2 is grounded, and the positive terminal of power supply U2 is connected to one end of a safety pin. The other end of the safety pin is connected in series with a resistor R2 and a thermistor R1 and then grounded. The other end of the safety pin is connected to the positive terminal of a 3.3V power supply. One end of the resistor R2 connected to the thermistor R1 is connected to the RB4 pin of the ignition control chip U1. The Vcc pin of the ignition control chip U1 is connected to the positive terminal of the 3.3V power supply, and the Gnd pin of the ignition control chip U1 is grounded. A capacitor C3 is connected between the Vcc pin and the Gnd pin of the ignition control chip U1, and the FIRE signal is output from the RB3 pin of the ignition control chip U1.
[0017] Main operating procedure: First, operate the safety pin (power switch function). The safety pin can be pull-out. When the safety pin is pulled out, power supply U2 is connected to the circuit, causing resistor R2 and thermistor R1 to be connected to the circuit, and charging capacitor C3. When the external ambient temperature rises, for example, to 105 degrees Celsius, the resistance of thermistor R1 increases, causing the voltage on pin RB4 of ignition control chip U1 to rise. Capacitor C3 supplies power to ignition control chip U1, and pin RB3 of ignition control chip U1 outputs a FIRE signal (high level). This electronic fire extinguishing grenade can determine whether to trigger the ignition signal based on the external ambient temperature information.
[0018] Specifically, in one optional implementation, the FIRE signal is connected to the gate (G) of MOSFET Q3 via a series resistor R7. The drain (D) of MOSFET Q3 is connected to the gate (G) of MOSFET Q4 via a series resistor R4. The source (S) of MOSFET Q3 is grounded. The drain of MOSFET Q4 is connected to the transducer R3 via a series connection and then grounded. The source of MOSFET Q4 is connected to the cathode of diode D1 via a series resistor R6. The anode of diode D1 is connected to the positive terminal of a 3.3V power supply. One end of resistor R8 is connected to the gate (G) of MOSFET Q3, and the other end is grounded. One end of resistor R5 is connected to the gate (G) of MOSFET Q4, and the other end is connected to the drain (D) of MOSFET Q4. The source of MOSFET Q4 is connected to the anode of electrolytic capacitor C1, and the cathode of electrolytic capacitor C1 is grounded. When the safety pin is pulled out, power supply U2 is connected to the circuit to charge electrolytic capacitor C1.
[0019] When the electronic fire extinguishing bomb is positioned at the fire location, the high temperature causes the resistance of the thermistor R1 to rise. The ignition control chip U1 outputs a FIRE signal, turning on MOSFETs Q3 and Q4. Electrolytic capacitor C1 then powers the transducer R3, causing it to ignite and explode, dispersing the fire extinguishing material and achieving the fire suppression effect. In other words, when the ambient temperature reaches a dangerous level, the fire extinguishing bomb automatically detonates, dispersing the fire extinguishing material to aid in extinguishing the fire.
[0020] The above description is only a specific embodiment of the present utility model. Various examples and illustrations do not constitute a limitation on the substantive content of the present utility model. Those skilled in the art can make modifications or variations to the above-described specific embodiments after reading the description without departing from the essence and scope of the utility model.
Claims
1. An electronic fire extinguishing bomb with temperature sensing control, comprising a control circuit, the control circuit comprising an electronic control module, the electronic control module comprising a firing control chip U1 outputting a FIRE firing signal, characterized in that: The control circuit also includes a safety pin and a thermistor R1. The negative terminal of the power supply U2 is grounded, and the positive terminal of the power supply U2 is connected to one end of the safety pin. The other end of the safety pin is connected to the ground via a series connection of resistor R2 and the thermistor R1. The other end of the safety pin is connected to the positive terminal of the 3.3V power supply. One end of resistor R2 connected to the thermistor R1 is connected to the RB4 pin of the ignition control chip U1. The Vcc pin of the ignition control chip U1 is connected to the positive terminal of the 3.3V power supply, and the Gnd pin of the ignition control chip U1 is grounded. Capacitor C3 is connected between the Vcc pin and the Gnd pin of the ignition control chip U1, and the FIRE ignition signal is output from the RB3 pin of the ignition control chip U1.
2. The thermally controlled electronic fire extinguishing bomb according to claim 1, wherein: The FIRE signal is connected in series with resistor R7 and then to the gate (G) of MOSFET Q3. The drain (D) of MOSFET Q3 is connected in series with resistor R4 and then to the gate (G) of MOSFET Q4. The source (S) of MOSFET Q3 is grounded. The drain of MOSFET Q4 is connected in series with transducer R3 and then to ground. The source of MOSFET Q4 is connected in series with resistor R6 and then to the cathode of diode D1. The anode of diode D1 is connected to the positive terminal of a 3.3V power supply. The source of MOSFET Q4 is connected to the anode of electrolytic capacitor C1. The cathode of electrolytic capacitor C1 is grounded.
3. The thermally controlled electronic fire extinguishing bomb according to claim 2, wherein: One end of resistor R8 is connected to the gate of MOSFET Q3, and the other end of resistor R8 is grounded.
4. The thermally controlled electronic fire extinguishing bomb according to claim 2, wherein: One end of resistor R5 is connected to the gate (G) of MOSFET Q4, and the other end of resistor R5 is connected to the drain (D) of MOSFET Q4.
5. The thermally controlled electronic fire extinguishing bomb according to claim 1, wherein: The thermistor R1 is mounted on the surface of the outer shell of the electronic fire extinguishing bomb, and the thermistor R1 is in contact with the external environment.
6. The thermally controlled electronic fire extinguishing bomb according to claim 5, wherein: It includes multiple thermistors R1, which are connected in parallel and distributed around the surface of the electronic fire extinguishing bomb.
7. The thermally controlled electronic fire extinguishing bomb according to claim 2, wherein: The outer shell of the electronic fire extinguishing bomb is filled with fire extinguishing material, which contains fission-inducing units. The transducer R3 is used to activate the fission-inducing units.