Abstract
Existing air purifiers are mostly indoor air circulation, and most of them cannot achieve indoor and outdoor air circulation and provide fresh air to room. At the same time, the current air purifier filter on the market after absorbing a large amount of dust and other pollutants, if not replaced in time, is likely to cause secondary pollution. In response to these problems, this paper carried out an exploratory research that can achieve indoor and outdoor air purification device. According to the clean air volume of HEPA filter, the pressure of fan and the cross-sectional area of filter are determined, meanwhile, the air resistance of indoor and outdoor circulating air purifier, the effect of air blower on air purification efficiency and filter CADR are discussed in detail. According to the filtering characteristics of single-layer filter, a kind of indoor and outdoor circulating air purifier-single-layer filter type air purifier was designed. Among the air purifier, the PLC control circuit is used to achieve single-layer filter air purifier filter automatically replace.
Highlights
In the winter of 2012, air pollution in China was so severe that one-third of the Chinese territory was covered by fog and haze, and the continuously hazy weather in most big cities lasted for more than 30 days [1]
A recent Chinese case study concluded that the reduction in life expectancy of about 3 years may be expected from long-term exposure to an additional 100 μg/m3 of Total Suspended Particles (TSPs) [3]
This paper designs an air purifier that can purify the outdoor air to the room and fresh air is supplied to the room by filtering outdoor air
Summary
In the winter of 2012, air pollution in China was so severe that one-third of the Chinese territory was covered by fog and haze, and the continuously hazy weather in most big cities lasted for more than 30 days [1]. At the beginning of 2016, haze appeared in many places in China. It should be pointed out that the annual average concentration of PM2.5 standard set by the World Health Organization is less than 10 μg / m3, and the annual average concentration of 35 μg / m3 will greatly increase the incidence of haze and death. The status quo of haze pollution in China has been extremely serious. The problem of haze pollution control has long been impeded
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