Is it harmful to human body to install smoke alarm at home?

First, about the smoke alarm:

Smoke detectors can prevent fire by monitoring the concentration of smoke. An ion smoke sensor is used inside. Ion smoke sensor is a kind of sensor with advanced technology and stable and reliable work, which is widely used in various fire alarm systems, and its performance is far better than that of gas-sensitive resistance fire detector. Smoke detectors are easy to install and have remarkable effects, and have been widely used in important fire prevention places such as homes, factories, office buildings, hospitals, schools and museums.

Second, the principle of smoke alarm:

The infrared beam of the infrared emission tube of the smoke detector is scattered by smoke particles, and the intensity of the scattered light is directly proportional to the concentration of the smoke, so the intensity of the infrared beam received by the photosensitive tube will change and be converted into a point signal, and finally into an alarm signal. The smoke sensing of the alarm is mainly completed by the optical maze, in which a group of infrared emitting and receiving photocells are installed, and the diagonal angle is 135 degrees. When there is no smoke in the environment, the receiving tube can't receive the infrared light emitted by the infrared emitting tube, and the subsequent sampling circuit has no electric signal change; When there is smoke in the environment, smoke particles enter the maze to scatter the infrared light emitted by the emission tube, and the intensity of the scattered infrared light has a certain linear relationship with the smoke concentration. The following sampling circuit changes, and the main control chip built in the alarm determines whether there is a fire alarm. Once the fire alarm is confirmed, the alarm sends out a fire alarm signal, the fire indicator (red) lights up, and the buzzer starts the alarm.

Three, the working state of smoke alarm:

After installation, the smoke alarm is already in working condition. In this state, the LED on it flashes about once every minute. When burning particles are detected, the smoke alarm will give out a crisp and loud pulsating alarm sound until the air becomes clean again.