What is the working principle of the smoke alarm?

Before introducing the working principle of the smoke alarm, the concept of the smoke alarm is introduced. The smoke alarm is also called the fire smoke alarm, the smoke sensor, the smoke sensor and the like. Generally, the battery of the independent, physical product battery, or the AC power supply battery is used for standby power, and the sound and light indication can be given when the alarm is ready, which is called a stand-alone smoke alarm. Powered by the bus, there can be more than one connection on the bus. It is connected with the fire alarm controller and communicates to form an alarm system. There is no sound at the scene when the alarm occurs. The host has sound and light prompts. This type of smoke alarm device is generally called smoke detection. Device. Smoke detectors are coded with address codes and are not coded.

How smoke alarms work

From the intrinsic principle, the smoke alarm is to prevent fire by monitoring the concentration of smoke. For example, the Langxin smoke alarm uses ion smoke sensor inside. It is a technologically advanced, stable and reliable sensor that is widely used. It is used in various fire alarm systems, and its performance is far superior to that of gas sensors.

It has a radiation source é•…241 inside and outside the ionization chamber, and the positive and negative ions generated by ionization move to the positive and negative electrodes under the action of the electric field. Under normal conditions, the current and voltage of the internal and external ionization chambers are stable. Once there is smoke, escape the ionization chamber. Interfering with the normal movement of charged particles, the current and voltage will change, destroying the balance between the internal and external ionization chambers, so the wireless transmitter sends a wireless alarm signal to inform the remote receiving host to transmit the alarm information.