Automatic smoke exhaust fan

Abstract

The invention relates to an automatic smoke exhaust fan, and belongs to the technical field of smoke exhaust fans. The automatic smoke exhaust fan can automatically start and stop, and the rotating speed of a fan motor can be adjusted. According to the technical scheme, the automatic smoke exhaust fan comprises a fan body, a fan controller inside the fan body and a smoke sensor G1 arranged at the air inlet of the fan body. The fan controller comprises a time base integrated circuit chip IC1, a silicon controlled rectifier D1, a bidirectional thyristor D4 and the fan motor M1. The automatic smoke exhaust fan is applicable to the field of smoke exhaust and air exhaust fans.

Description

technical field [0001] The automatic smoke exhaust fan of the invention belongs to the technical field of smoke exhaust fans. Background technique [0002] In daily life, activities such as smoking in densely populated rooms or cooking in the kitchen will produce a large amount of smoke, which contains inhalable particles PM1.0 and PM2.5 that are harmful to the human body. These inhalable particles are deposited in the alveoli through the respiratory tract If it is dissolved, it will directly invade the blood, causing poisoning, and the undissolved inhalable particles may be absorbed by cells, invade lung tissue or lymph nodes, and cause pneumoconiosis; living or working in such an environment for a long time may cause disease , which is extremely harmful to the human body; in order to solve the problem of the smoke on the indoor environment and the human body, the general practice is to install smoke exhaust equipment in the building, and the fan motor installed in the indo...

AI Technical Summary

Problems solved by technology

[0002] In daily life, activities such as smoking in densely populated rooms or cooking in the kitchen will produce a large amount of smoke, which contains inhalable particles PM1.0 and PM2.5 that are harmful to the human body. These inhalable particles are deposited in the alveoli through the respiratory tract If it is dissolved, it will directly invade the blood, causing poisoning, and the undissolved inhalable particles may be absorbed by cells, invade lung tissue or lymph nodes, and cause pneumoconiosis; living or working in such an environment for a long time may cause disease , which is extremely harmful to the human body; in order to solve the problem of the smoke on the indoor environment and the human body, the general practice is to install smoke exhaust equipment in the building, and the fan motor installed in the indoor ceiling passes through the pipe and a series of exhaust outlets. Exhaust smoke and air; when the fan motor is started, a negative pressure is formed in the room, the indoor polluted air is discharged to the outside through the air duct and the exhaust outlet, and the outdoor fresh air enters the room through the air inlet installed above the window frame, so that Indoor personnel can breathe high-quality fresh air; in order to ensure the ventilation effect, most of the existing ventilation systems use fans with a fixed speed for 24-hour uninterrupted power supply. , resulting in a waste of resources, and because the fan speed is fixed, for the occasions with heavy smoke, it is impossible to ensure that the dirty air in the room can be continuously and stably discharged outside for a long time; therefore, a smoke exhaust that can automatically start and stop, and adjust the speed in real time The fan is particularly important

Images