An ultrasonic fire extinguisher

Abstract

An ultrasonic fire extinguisher, including a transducer with a wiring port installed on a base cylinder, the transducer is connected to an external ultrasonic signal generator through the wiring port, and the transmitting end of the transducer is located in the base cylinder A horn with a launch cone is installed, and an energy-gathering cover is installed on the launch cone at the end of the base tube located at the rear end of the horn, and a reflective disk is installed on the outside of the base tube; the invention adopts a cone-shaped launch end , its inner surface not only generates ultrasonic waves, but also can reflect the ultrasonic waves emitted from the opposite side, which integrates the functions of emission and reflection; sound waves. The reflector reflects the ultrasonic waves emitted backwards and outwards from the emitting cone and propagates forward. In this way, all the ultrasonic energy emitted from each side of the transmitting end is concentrated to the front for parallel emission, and the effective sound energy propagating forward and the effective area of ​​effect are increased by 8 times compared with that without the energy-concentrating cover and the reflector.

Description

technical field [0001] The invention belongs to the field of fire fighting equipment, and in particular relates to an ultrasonic fire extinguisher. Background technique [0002] Sound propagates in the air in the form of longitudinal waves, which will change the density of the medium, making the air compressed and sparse, resulting in an increase or decrease in the original atmospheric static pressure, thereby generating sound pressure. The sound pressure value of the compressed state is a positive value, and the sound pressure value of the sparse state is a negative value. This propagation process is only the transfer process of energy, without the transfer of mass, and the air molecules cannot be directly displaced, but vibrate near the equilibrium position. Therefore, the sound has the following three effects on the combustion phenomenon: (1) The longitudinal vibration of gas molecules has a tearing effect on the flame surface in the gas state. When the amplitude is smal...

AI Technical Summary

Problems solved by technology

At present, the invention is still in the prototype stage, it can only extinguish some small fires, and there are still many technical problems to be overcome

In 2008, there was an ultrasonic fire extinguishing trainer reported in Japan on fire technology and product information, but there was no report on its detailed information

For the cone emitter, most of its sound energy is directly emitted to the vertical direction of the cone, but not to the front, so the energy obtained in front of the emitter is limited and cannot be used for long-distance fire extinguishing

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