Disadvantages of humidifier

　　shortcoming

　　1. It is easy to breed bacteria

　　The working principle of the humidifier is to increase the water content in the air, atomize the water into ultrafine particles, wet the air, and increase negative oxygen ions. However, the humidifier not only moistens the air, but also provides a growing environment for bacteria to breed and multiply in large numbers. People with relatively weak resistance, such as the elderly and children, may cough or asthma after inhaling bacteria.

　　2. Potential radiation hazard

　　Most popular humidifiers on the market are ultrasonic spray type. Although this ultrasonic technology does little harm to human ears, it will still have a slight impact if placed too close to people. The radiation generated by humidifier is not small. There are hidden dangers in frequent contact. The room of pregnant women or babies should not be too close to the humidifier.

　　3. Aggravate rheumatism

　　Damp air will aggravate arthritis, diabetes and other conditions. Therefore, hospitals with strict requirements generally prohibit air humidifiers.

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