Expiratory valve airtightness testing system

The utility model discloses an air tightness test system for an exhalation valve. The exhalation valve comprises an exhalation valve connecting piece, the exhalation valve connecting piece is sequentially provided with a first fixing cavity and a second fixing cavity in the airflow direction. The first fixing cavity is larger than the second fixing cavity; a breather pipe is arranged at the bottomof the second fixing cavity; according to the exhalation valve airtightness testing device, the exhalation valve is fixed in the first fixing cavity or the second fixing cavity according to differentsizes of the exhalation valve to detect the airtightness of the exhalation valve, and the effects of saving cost and improving the testing efficiency of the airtightness of the exhalation valve are achieved. 本实用新型公开了一种呼气阀气密性测试系统：包括有呼气阀连接件，所述呼气阀连接件沿气流方向依次设置有第一固定腔和第二固定腔，所述第一固定腔大于第二固定腔，所述第二固定腔底部设置有通气管，所述第一固定腔、第二固定腔与通气管依次连通设置.本实用新型通过根据呼气阀的不同尺寸将呼气阀固定在第一固定腔或者第二固定腔中对呼气阀的气密性进行检测，起到了节约成本及加快呼气阀气密性的测试效率的作用。