Primary structure includes a connection pipe body, the Yang Yafakou at a formation what connection pipe body side, the gas outlet at a formation what connection pipe body other side, one sets Non-return air valve at the what gas outlet, the connecting piece of mask pipe and a fixed what gas outlet for setting at the what Non-return air valve side and leading to the gas outlet, the connecting piece system include one accommodate the air valve linking part of the Non-return air valve, one for the fixed gas outlet port linking part and one for the fixed mask pipe mask linking part. By above-mentioned structure, when user does aspiratory action, gas just flow to mask pipe from gas outlet via Non-return air valve is opened, when exhaling to what, then because Non-return air valve is not opened, and it is expelled directly out from Yang Yafakou, and by what air valve linking part, port linking part and mask linking part and each component what connecting piece all linked with one another, make its easily disassembled cleaning, thereby each component can be made deeply to clean and sterilize, and then promote safety and sanitation and reduce infection probability.主要結構包括一連接管體、一形成於連接管體一側處之陽壓閥口、一形成於連接管體另一側處之出氣口、一設於該出氣口處之單向氣閥、一設於該單向氣閥一側處並與該出氣口通連之面罩管及一固設於該出氣口之連結件，該連結件係包含一容置該單向氣閥之氣閥連結部、一供固設該出氣口之氣口連結部及一供固設該面罩管之面罩連結部。藉上述之結構，當使用者做吸氣動作時，氣體便經由開啟單向氣閥而從出氣口流至面罩管，至於呼氣時，則因單向氣閥未開啟，而從陽壓閥口直接排出，且由於氣閥連結部、氣口連結部及面罩連結部與各部件環環相扣於連結件，使其容易拆卸清洗，藉此能對各部件作深入清潔及消毒，進而提升安全衛生並降低感染機率。
