CN105903137A - Low-frequency sound wave fire extinguisher - Google Patents

Abstract

The invention relates to a low-frequency sound wave fire extinguisher, comprising a power supply, a waveform generator, a power amplifier and a loudspeaker, the power supply is used to provide power for the entire system; the waveform generator is used to generate low-frequency sound wave analog electrical signals; The low-frequency sound wave analog electrical signal is amplified; the sounding end of the speaker is equipped with a sound cavity; the speaker converts the amplified low-frequency sound wave analog electrical signal into a sound wave for playback; the sound cavity is used to play the sound wave of the speaker Perform directional aggregation. The invention can use sound wave energy to put out fires in various special occasions without causing other adverse effects on surrounding objects.

Description

A low-frequency sound wave fire extinguisher

technical field

The invention relates to the technical field of fire fighting and fire extinguishing, in particular to a low-frequency sound wave fire extinguisher.

Background technique

The rapid development of human beings brings not only social progress, but also various hazards that affect the safety of human life and property. Fire is one of them. There are many kinds of traditional fire extinguishing methods, but the various fire extinguishing scenarios that firefighters have to face require far more fire extinguishing methods than the existing methods. For a series of special places such as electrical equipment places, special methods are required for fire extinguishing. For example, the use of gas fire extinguishing systems such as Halon series, carbon dioxide, etc. are often used in such places. However, the gas fire extinguishing system has some disadvantages: the misoperation of the gas fire extinguishing system in the confined space will threaten the life safety of the people inside, and the fire extinguishing start in an emergency requires the evacuation of personnel and affects the start time.

Contents of the invention

The technical problem to be solved by the present invention is to provide a low-frequency sound wave fire extinguisher, which can use sound wave energy to extinguish fires in various special occasions without causing other adverse effects on surrounding objects.

The technical solution adopted by the present invention to solve the technical problems is: provide a low-frequency sound wave fire extinguisher, including a power supply, a waveform generator, a power amplifier and a loudspeaker, the power supply is used to provide power for the entire system; the waveform generator is used to generate Low-frequency sound wave analog electrical signal; the power amplifier is used to amplify the low-frequency sound wave analog electrical signal; the sounding end of the speaker is equipped with a sound cavity; the speaker converts the amplified low-frequency sound wave analog electrical signal into sound waves for playback ; The sound cavity is used for directional gathering of the sound waves played by the loudspeaker.

The power supply is a wired power supply or a mobile power supply.

The waveform generator is used to generate acoustic wave analog electrical signals with a frequency of 20-80 Hz.

The acoustic cavity is cylindrical.

Beneficial effect

Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages and positive effects compared with the prior art: the fire extinguisher in the present invention does not need other fire extinguishing media, and the fire is extinguished through the joint action of low-frequency sound waves and air, without damaging the surroundings. The environment will cause secondary pollution, and at the same time, it will not cause secondary damage to the fire items. The fire extinguisher of the present invention has good portability, and can be used only by a wired power supply or a mobile power supply, so that it can be carried into a fire scene to put out a fire.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is a graph showing the relationship between sound waves and air pressure produced by the acoustic cavity in the present invention.

detailed description

Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

Embodiments of the present invention relate to a low-frequency sound wave fire extinguisher, as shown in Figure 1, comprising a power supply 1, a waveform generator 2, a power amplifier 3 and a loudspeaker 4, the power supply 1 is used to provide power for the entire system; the waveform generator The device 2 is used to generate low-frequency sound wave analog electrical signals; the power amplifier 3 is used to amplify the low-frequency sound wave analog electrical signals; the sounding end of the speaker 4 is equipped with a cylindrical sound cavity 5; the speaker 4 will amplify The final low-frequency sound wave analog electrical signal is converted into a sound wave for playing; the sound cavity 5 is used for directional gathering of the sound wave played by the loudspeaker. Wherein, the power supply is a wired power supply or a mobile power supply, so that the fire extinguisher has good portability.

The waveform generator is used to generate a sound wave analog electrical signal with a frequency of 20-80 Hz, and transmit it to the next stage. The power amplifier receives the low-frequency sound wave analog electrical signal generated by the waveform generator, and performs power amplification without changing the frequency of the sound wave, generates a low-frequency sound wave electrical signal with a large current, and then transmits the signal to the next stage. After the loudspeaker receives the signal, it converts the high-current low-frequency sound wave electric signal generated by the power amplifier into sound waves, and the cylindrical sound cavity gathers the sound waves in a directional way and excites them. Utilize the relationship between the frequency, amplitude and air pressure of the sound wave to affect the air pressure in the environment where the fire source is located, thereby reducing the oxygen density in the air in the environment where the fire source is located, so that the fire source can be extinguished by itself.

As shown in Figure 2, the low-frequency sound waves produced by the loudspeaker can be directionally enhanced by the acoustic cavity and directed towards the fire source. According to the relationship between sound wave and air pressure, it can be seen that the air pressure is the highest at the trough of the sound wave, the air pressure is the smallest at the peak of the sound wave, and the density of oxygen is the lowest at the lowest air pressure. The fire will be extinguished when the density of oxygen is lower than the demand for the fire to burn.

It is not difficult to find that the fire extinguisher in the present invention does not need other fire extinguishing media, and extinguishes fire through the joint action of low-frequency sound waves and air, which will not cause secondary pollution to the surrounding environment, and will not cause secondary damage to fire-catching items. The fire extinguisher of the present invention has good portability, and can be used only by a wired power supply or a mobile power supply, so that it can be carried into a fire scene to put out a fire.

Claims (4)

1. a low-frequency sound wave fire extinguisher, comprising a power supply (1), a waveform generator (2), a power amplifier (3) and a loudspeaker (4), is characterized in that the power supply (1) is used to provide power for the entire system; The waveform generator (2) is used to generate low-frequency sound wave analog electrical signals; the power amplifier (3) is used to amplify the low-frequency sound wave analog electrical signals; the sounding end of the speaker (4) is equipped with a sound cavity ( 5); the loudspeaker (4) converts the amplified low-frequency sound wave analog electric signal into sound waves for playing; the sound cavity (5) is used for directional gathering of the sound waves played by the loudspeaker (4). 2. The low-frequency sound wave fire extinguisher according to claim 1, characterized in that, the power supply (1) is a wired power supply or a mobile power supply. 3. The low-frequency sound wave fire extinguisher according to claim 1, characterized in that the waveform generator (2) is used to generate a sound wave analog electrical signal with a frequency of 20-80 Hz. 4. The low-frequency sound wave fire extinguisher according to claim 1, characterized in that, the sound cavity (5) is cylindrical.