Internal and external air purifier with automatic filter core replacement prompting function

Abstract

The invention discloses an internal and external air purifier with an automatic filter core replacement prompting function. Outdoor air is connected with an outdoor air inlet cavity through a first fan, the outdoor air inlet cavity and an indoor air inlet cavity are connected through a first electromagnetic valve, indoor air is connected with the indoor air inlet cavity through a second fan, the outdoor air inlet cavity is connected with the filter core through a second electromagnetic valve, the indoor air inlet cavity is directly connected with the filter core, an outlet of the filter core is connected with an air outlet cavity through a heating device, an air pressure sensor is arranged on the inner wall of a case, a dust sensor is arranged in the indoor air inlet cavity, a photoelectric sensor is arranged on the filter core, and a control circuit is connected with the photoelectric sensor, the dust sensor and the air pressure sensor, the two fans, the two electromagnetic valves and the heating device. The internal and external air purifier has the advantages that two modes including an internal circulation mode and an external circulation mode and the function of automatically prompting the filter core replacement are realized, the functions of the air purifier are improved, the purification effect is improved in the method aspect, the problems of vitiated air exhaust incapability during window closing, air purification effect reduction during window opening and the like are solved, and convenience is brought for users.

Description

technical field [0001] The invention relates to a household appliance, which belongs to the field of air purification equipment, and in particular to an internal and external circulation air purifier which can automatically prompt replacement of filter elements. Background technique [0002] With the development of the economy and the improvement of people's living standards, environmental pollution has become a serious social problem. The air pollution represented by smog has attracted more and more attention. People often prevent smog by improving the airtightness of buildings, but this only prevents outdoor dust and other substances from entering the room, but ignores indoor air pollution. [0003] People spend more than 80% of their time indoors on average every day, so the indoor air quality is particularly important. Most of the common air purifiers on the market today are internal circulation purifiers that use filters, which cannot guarantee the freshness of the air...

AI Technical Summary

Problems solved by technology

People often prevent smog by improving the airtightness of buildings, but this only prevents outdoor dust and other substances from entering the room, but ignores indoor air pollution

[0003] People spend more than 80% of their time indoors on average every day, so the indoor air quality is particularly important. Most of the common air purifiers on the market today are internal circulation purifiers that use filters, which cannot guarantee the freshness of the air. and liquidity

If the windows are closed, no oxygen will come in, and indoor dirty air such as carbon dioxide cannot be discharged; if the windows are open, the effect of air purification will be greatly reduced

In addition, although the filter screen can remove particulate pollutants in the air, if the filter screen full of dust and particles cannot be cleaned or replaced in time, the purification effect of the purifier will decrease, and the dust and mold accumulated on the filter screen will It may also cause secondary pollution to indoor air

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