Gas exchange pressure difference testing device for medical mask

The utility model discloses a gas exchange pressure difference testing device for a medical mask, which belongs to the technical field of medical supply inspection and structurally comprises a mechanical system and a control system. The output end of the linear driving device is connected with the upper gas pipeline and drives the upper gas pipeline to move up and down; a lower gas pipeline butted with the upper gas pipeline is arranged below the upper gas pipeline; the control system comprises a first pressure transmitter, a second pressure transmitter, a mass flow meter and a mass flow controller, the first pressure transmitter and the mass flow meter are both communicated with the upper gas pipeline, and the second pressure transmitter and the mass flow controller are both communicated with the lower gas pipeline. The device is suitable for detecting medical masks with different thicknesses, does not need to additionally cut masks for sample preparation, and is high in automation degree and simple and conv