The invention relates to a cover structure of a water mist sprayer.Inside the outer body is an ultrasonic oscillator.Fan and cover structure,The outer body itself has inner,Outer space,In the inner space, an ultrasonic oscillator is assembled.The fan is installed on the bottom plate.The ultrasonic oscillator and fan are connected in series in the power supply connector.After that, the inner edge of outer space assembled to the outer body is fixed.There are air channels between outer space and inner space.A nozzle protruding from the cover body is arranged in the top of the cover body.And an extension ring surface is arranged around the nozzle；When the mixing level of water and essential oil is in the inner space,We need to cover the inner space of the outer body.As a result, the extended torus in the cover body can concentrate the water mist produced by the start-up of the ultrasonic oscillator and fan to flow towards the nozzle of the cover body and spray out.There is no leakage between the cover body and the outer body through the extended ring around the inner nozzle of the cover body.For smooth fragrance.一種水霧噴散芳香器之蓋體構造，係在外體的內部組裝有超音波振盪器、風扇及蓋體構成，外體本身係具有內、外層兩空間，在內層空間底下係組裝有一超音波振盪器，而風扇則安裝在底板上，並使超音波振盪器及風扇分結串結在電源供應接頭中，之後再一併組裝到外體的外層空間之內緣面固定住，外層空間與內層空間之間並有空氣流道，其中在蓋體的頂部裡內係具有一突出於蓋體本身的噴口，並在噴口周邊則設有一延伸環面；當水液及精油所形成的混合液位在內層空間後，得將蓋體貼蓋在外體的內層空間周邊，以致蓋體裡內的延伸環面遂將超音波振盪器及風扇啟動後所產生的水霧氣得以集中朝向蓋體的噴口流動噴散出；是藉由蓋體裡內噴口周邊所設有的延伸環面以為蓋體與外體之間不會產生洩漏現象、以供順利散發芳香氣味。
