Traditional Culture Encyclopedia - Hotel reservation - What is this? There is a red light flashing above the hotel room.

What is this? There is a red light flashing above the hotel room.

A ball with a red light on the top of the hotel room is a smoke alarm (smoke sensor). When there is a fire in the room, it will give an alarm, and the fire sprinkler will automatically start sprinkling water to extinguish the fire. Smoke alarm, also known as fire smoke alarm, smoke sensor, smoke sensor, etc.

Smoke alarm realizes fire prevention by monitoring the concentration of smoke. The smoke alarm adopts ion smoke sensor, which is a kind of sensor with advanced technology and stable and reliable work. It is widely used in various fire alarm systems, and its performance is far superior to that of gas-sensitive resistance fire alarm. ?

Extended data:

Smoke alarm, also known as fire smoke alarm, smoke sensor, smoke sensor, etc. The power supply is supplied by the bus, which can be connected with multiple buses to form an alarm system and communicate with the fire alarm controller through networking. There is no sound at the scene when the alarm is given, and the host has an audible and visual prompt. This kind of smoke alarm device is generally called smoke detector.

Ion smog

The ion smoke detector has an ionization chamber, and the intensity of the radiation element americium 24 1(Am24 1) used in the ionization chamber is about 0.8 micro-curies, which is in an electric field equilibrium state under normal conditions. When the smoke enters the ionization chamber, this equilibrium relationship will be destroyed, and the alarm circuit will alarm when it detects that the concentration exceeds the set threshold.

Photoelectric smog

There is an optical maze with an infrared counter in the photoelectric smoke alarm. When there is no smoke, the infrared receiver tube cannot receive the infrared light emitted by the infrared emitter tube. When the smoke enters the optical maze, the receiving tube receives infrared light through refraction and reflection, and the intelligent alarm circuit judges whether it exceeds the threshold, and if it exceeds the threshold, it gives an alarm.

References:

Baidu encyclopedia-smoke alarm