Real-time dynamic and quantitative detection device for carbon dioxide in human exhaled air

A real-time dynamic and quantitative detection device for carbon dioxide in human exhaled air, comprising:

• a face mask, comprising an air inlet and an air outlet;
• an inhalation channel connected with the air inlet of the face mask, wherein a first one-way valve is provided in the inhalation channel;
• an exhalation channel connected with the air outlet of the face mask, wherein a second one-way valve is provided in the exhalation channel;
• an air path switching element connected with the exhalation channel to realize switching between an exhalation air path to be detected and an inflation air path;
• a detection air chamber connected with the exhalation channel, wherein at least one carbon dioxide sensor connected with an external upper computer is provided in the detection air chamber;
• and
• a carbon dioxide absorber is connected to an end of the detection air chamber, wherein:
• the carbon dioxide absorber comprises a first side opposite to a second side,
• the first side is connected to the end of the detection air chamber,
• the second side is connected to the inhalation channel, and
• the carbon dioxide absorber is configured to prevent carbon dioxide re-entering the detection air chamber,
• wherein, the real-time dynamic and quantitative detection device is configured such that, before detection, the air path switching element switches to the inflation air path to clean and initialize the detection air chamber;
• during detection, the air path switching element switches to the exhalation air path to be detected, then the human exhaled air enters the detection air chamber through the exhalation channel, and real-time dynamic and quantitative detection of carbon dioxide in the human exhaled air is realized by the at least one carbon dioxide sensor.