An alarm device for the concentration of inhalable particulate matter in the air exceeding the limit

Abstract

The invention discloses an off-limit alarm device for the concentration of inhalable particulate matter in air. The off-limit alarm device for the concentration of the inhalable particulate matter in air comprises an alarm circuit with an alarm apparatus. The alarm circuit is provided with two switching-in ends for controlling on-off of a control circuit. The off-limit alarm device for the concentration of the inhalable particulate matter in air is characterized by comprising a containing body, wherein a third switch fan blade is arranged in the containing body and divides the inner cavity of the containing body into an upper air inlet chamber and a lower detection chamber, an air inlet channel is formed in the side wall of one side of the air inlet chamber, a second switch fan blade is arranged on the side wall of the other side of the air inlet chamber, and a first filter film is arranged in the air inlet channel; a second filter film, a third filter film, a metal plate and a fourth switch fan blade are arranged in the detection chamber from top to bottom in sequence at intervals; the two switching-in ends of the alarm circuit are each electrically connected with the third filter film and the metal plate. According to the off-limit alarm device for the concentration of the inhalable particulate matter in air, an alarm can be given when the inhalable particulate matter concentration in indoor air exceeds a limit value under a common standard; meanwhile, the off-limit alarm device for the concentration of the inhalable particulate matter in air has the advantages of being simple in structure, low in cost, sensitive and reliable in detection and the like.

Description

technical field [0001] The invention relates to the technical field of air pollutant monitoring; in particular, it relates to a new technology for real-time monitoring and alarming of the concentration of inhalable particulate matter in indoor air. Background technique [0002] With the advancement of industrialization and the improvement of people's living standards, environmental issues, especially air quality issues, have increasingly attracted people's attention. In the winter of 2011, severe smog occurred in northern my country, which did great harm to people's healthy life. The main reason for the formation of smog is the high concentration of inhalable particulate matter in the air. Inhalable particulate matter refers to the particulate matter in the atmosphere with a diameter less than or equal to 10 μm. Particles with a diameter of less than 2.5 μm are more harmful to the human body. They can directly invade the alveoli of the human body, and can also enter the blo...

AI Technical Summary

Problems solved by technology

This design scheme uses a complete analytical balance as part of the device for accurate weight measurement, but the analytical balance is a precision measuring instrument with an average price of more than 10,000 yuan, which makes the device itself extremely expensive and difficult to popularize for civilian use

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