Outdoor PM 2.5 concentration based automatic adjusting type air duct filtering device of building

Abstract

The invention relates to an outdoor PM 2.5 concentration based automatic adjusting type air duct filtering device of a building, and belongs to the field of mechanical ventilation of buildings. The device comprises a coarse effect filtering channel, an a high effect filtering channel, a head blower of an outdoor particular matter sensor and an indoor particular matter sensor, wherein the coarse effect filtering channel and the a high effect filtering channel are connected in parallel and arranged between the air inlet end and the air outlet end of the air duct of the building; the coarse effect filtering channel comprises a coarse effect filter and a coarse effect channel air valve; the a high effect filtering channel comprises a coarse effect filter, a high- and medium-effect filter of an a high effect channel, a high effect channel air valve and an assistant fan. The device further comprises first pressure difference sensors, second pressure difference sensors and a PLC, wherein the first pressure difference sensors are connected to two ends of the coarse effect filter; the second pressure difference sensors are connected to the inlet end of the coarse effect filter and the outlet end of the high- and medium-effect filter; the PLC is equipped with a visual touch screen and is electrically connected. With the adoption of the device, the filtering efficiency and the running safety can be ensured; the device is applied to the transformation of filtering units of ventilating systems of large public buildings.

Description

technical field [0001] The invention belongs to the field of fresh air ventilation for public buildings, in particular to a 2 . 5 A building air duct filter device with automatic concentration adjustment. Background technique [0002] Indoor air quality significantly affects people's health, comfort and work efficiency, and has attracted more and more attention. In buildings that have been airtight for a long time, the air quality continues to decline. The introduction of outdoor fresh air can provide oxygen to the room and dilute the air with high concentration of indoor pollutants, which is an important means to improve indoor air quality. The fine particulate matter (PM) in the outdoor atmosphere of our country 2.5 ) concentration is high, and the introduction of fresh air will lead to an excessively high concentration of indoor particulate matter, resulting in poor indoor air quality. In existing large public buildings using central air-conditioning systems, commonl...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the existing building ventilation system can not filter PM effectively and low energy consumption 2.5 The question is posed according to the outdoor PM 2.5 A building air duct filter device with automatic concentration adjustment. This device uses sensors according to the outdoor PM 2.5 Concentration, automatically adjust the use of the air duct to obtain clean fresh air, and has the characteristics of energy saving and high efficiency

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