The respirator Department Will mono- Xuan Turn Valve Let Yu mono- Machine Shell The Machine Shell of Yi Seed Ke Qie Change Gong Gas Seed Class have the channels Jin Gas mono- and a bis- Jin Gas channel And be formed with Chu Gas Kong Inter, a The Xuan Turn Valve can what one hinder the logical first positions Block The mono- Jin Gas Tong Dao With The Chu Gas Kong Inter Even and the logical second position Inter Turn Move of a resistance Block The bis- Jin Gas Tong Dao With The Chu Gas Kong Inter EvenThereby, The the first, bis- Jin Gas channel Ke Fen Do pass to the sources oxygen Gas and the sky sources Gas Yong Yi Even, as long as user Will The Xuan Turn Valve Qie Change can go out Gas Body Qie Change As skies Gas or oxygen Gas to the first positions The or the second position according to demand Will The respirators institute Lose.一種可切換供氣種類之呼吸器,係將一旋轉閥設於一機殼,該機殼具有一第一進氣通道及一第二進氣通道,並形成有一儲氣空間,該旋轉閥可於一阻擋該第一進氣通道與該儲氣空間連通之第一位置及一阻擋該第二進氣通道與該儲氣空間連通之第二位置之間轉動;藉此,該第一、第二進氣通道可分別用以連通至一氧氣源及一空氣源,使用者只要將該旋轉閥切換至該第一位置或第二位置,即可依照需求將該呼吸器所輸出之氣體切換為空氣或氧氣。