The invention is composed of a water tank and an electric box. The water tank is provided with an oscillator and a fan which can output water mist, and the electric box is provided with a power converter and a power switch which can control the output of the water mist. The characteristics are as follows: 1. The electric box is provided with a delay unit, which can control the fan to continue to run for a set time when the oscillator is momentarily powered off, so as to avoid the residual water mist inside the water tank and eliminate the problem of water mist eroding the fan. 2. The water tank is maintained between the bottom surface of the fan and the top surface of the water tank, and has a convection channel connecting the inside and outside of the water tank. Oscillator and water temperature cooling efficiency. Therefore, the present invention ensures the service life of the fan and the oscillator through the multiplication and multiplication of these two features.本發明由水箱、電箱組成。該水箱設有可輸出水霧之震盪器及風扇，而電箱則設有可控制前述水霧輸出與否之電源變換器、電源開關。特徵在於：一、電箱設有延遲單元，用以在震盪器瞬間斷電時，可控制風扇持續運轉一設定時間，如此即可避免水箱內部殘留水霧，俾排除水霧侵蝕風扇問題。二、水箱在風扇底面與水箱頂面之間，保持有一連通水箱內外之對流通道，除使風扇在待機時較不會受到水箱溼氣侵蝕外，更可提升水箱內外對流，俾能提升震盪器及水溫散熱效率。是以，本發明透過該兩特徵加乘作用，從而確保風扇及震盪器使用壽命。
