Το ανάβω για πρώτη φορά, και η άλλη συσκευή καθαρισμού αέρα (Xiaomi Smart Air Purifier 4) δείχνει ποσότητα σωματιδίων στον άερα από π.χ. 005 φτάνει στα 500. Γνωρίζει κάποιος την αιτία; Είναι τόσο φορτισμένος με (ίσως επικίνδυνα) σωματίδια ο αέρας που βγάζει ο υγραντήρας; Μήπως είναι από το νερό της βρύσης που περιέχει χλώριο κλπ.; Αλλά και νερό από εμφιαλωμένα μπουκάλια έβαλα, πάλι το ίδιο.
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Από ό,τι φαίνεται, μάλλον αυτή είναι η απάντηση:
<<As Xiaomi Smart Humidifier 2 can atomize the water into relatively tiny droplets in the mist, the diameter of the water droplets is similar to that of various dusts in the air, such as PM2.5, so the water droplets and dusts are indistinguishable to the particle sensor on Xiaomi air purifier, which would mistake the tiny water droplets for dusts in the air.
Therefore, when the purifier in auto mode detects that the PM2.5 content in the air is high, it will run at a higher power, which is normal; it is the same case for the PM2.5 detector, the PM2.5 value displayed will increase, which is normal.
Therefore, it is recommended that users try to run Xiaomi air purifier and humidifier at different times. If they must be used at the same time, try to keep the purifier and PM2.5 detector away from the humidifier in different rooms.
The user shall be clearly informed that this is not a quality issue or a defect. Most of the current sensors are prone to such issue. When they are used, try not to use them at the same time or keep them far away.>>
Πηγή: https://www.mi.com/global/support/faq/details/KA-13534/
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Διαβάστε όμως και αυτή την έρευνα, γενικά για τους ultrasonic υγραντήρες:
<<Exposure at the indoor water–air interface: Fill water constituents and the consequent air emissions from ultrasonic humidifiers: A systematic review>>https://doi.org/10.1111/ina.13129
<<This systematic review is the first to comprehensively summarize and evaluate results of a wide range of chemical and microbial waterborne constituents emitted from ultrasonic humidifiers. The review demonstrates that ultrasonic humidifier emissions are closely related to the fill water quality, for the investigated dissolved minerals and metals as PM, dissolved humidifier biocide, insoluble metal oxides and asbestos, and microbes. The use of an ultrasonic humidifier not only adds moisture to indoor air, but also releases waterborne chemical and microbial contaminants, increasing the mass concentrations to which humans are exposed. Adverse health outcomes of scarce case reports indicate that lung injury risk occurs, even though the incidence of hospitalized patients is low. Currently, indoor air quality is gaining attention due to the global pandemic of bioaerosols; thus, exceedance of PM2.5 and emissions of microbes from ultrasonic humidifiers requires assessment of indoor air quality impacts. More guidance for and possible regulation of humidification devices should be considered.>>