PROBLEM TO BE SOLVED: To provide an automatic dry suction device for a dental unit chair.SOLUTION: Cyclone centrifugal separation means 20 includes: a cyclone gas-liquid separator in which the upper end is connected to an air suction port of an air compressor 10, and the circumference of the upper end part is connected to a suction tip of a unit chair, and which includes a conical part 21a having a foreign matter exhaust port 23 at the lower end a foreign matter storage 22 which includes an inflow port 24 connected to the foreign matter exhaust port of the cyclone gas-liquid separator at the upper end, and an exhaust port 25 at the lower end a branch pipe 26, two ends of which are connected to the foreign matter exhaust port of the cyclone gas-liquid separator and the exhaust port of the foreign matter storage through three-way valves 27a and 27b respectively and an exhaust pipe 28 for connecting a discharge port of the air compressor and the branch pipe.SELECTED DRAWING: Figure 1【課題】歯科ユニットチェア用全自動乾式サクション装置を提供する。【解決手段】サイクロン遠心分離手段20は、上端には、エアコンプレッサー10の空気吸入口と連結されて、上端部の周囲がユニットチェアのサクションチップと連結され、下端に異物排出口23を有する円錐形部21aを備えたサイクロン気液分離器と、このサイクロン気液分離器の異物排出口と連結される流入口24を上端に持つ、下端には排出口25を有する異物貯蔵庫22と、サイクロン気液分離器の異物排出口と異物貯蔵庫の排出口に両端が3方向バルブ27a、27bを介してそれぞれ連結される分岐管26と、エアコンプレッサーの吐出口と分岐管を連結する排気管28を備えて構成される。【選択図】図1
