Air path sealing structure of CO2 dehydrating cup and medical monitor using air path sealing structure

The utility model provides an air path sealing structure of a CO2 dehydrating cup and a medical monitor using the air path sealing structure. The air path sealing structure of the CO2 dehydrating cup comprises a dehydrating cup upper cover, a dehydrating cup lower cover, a ventilation film, a silica gel sealing gasket and a dehydrating cup body, wherein the dehydrating cup upper cover and the dehydrating cup lower cover are connected with each other; the ventilation film and the silica gel sealing gasket are arranged between the dehydrating cup upper cover and the dehydrating cup lower cover; the dehydrating cup body is fixedly connected to the dehydrating cup lower cover; the periphery of the dehydrating cup upper cover is provided with a semicircular groove; another semicircular groove matched with the semicircular groove are formed in a corresponding position on the dehydrating cup lower cover; the two semicircular grooves are matched with each other so as to form a first gas channel; a circular groove is