Product structure:

Description of characteristics:

Masks are designed using the Bernoull principle to deliver oxygen at a concentration of 24-50%. This section includes the AM-3 adult mask, adjustable oxygen concentration control valve and oxygen tube. It is commonly used in high flow rate oxygen therapy to provide the patient with the need for full inhalation, providing a predetermined and stable concentration of inhaled oxygen. Oxygen concentration control valve respectively has 24%, 26%, 28%, 31%, 35%, 40% and 50% seven different concentration values set, and according to the calibration flow operation. The regulator has a lockable feature to avoid improper operation or setting. Single patient use to avoid cross-infection.

The utility model provides a mask with simple structure, low manufacturing cost, adjustable oxygen concentration and continuous oxygen supply, which solves the technical problems of complex structure, inconvenient operation and high use cost of the mask existing in the prior art. The mask comprises a cup and an intake pipe arranged on the cup. The oxygen concentration regulating valve is arranged on the cup, the oxygen concentration regulating valve comprises a rotating valve stem connected on the cup, the inner end of the valve stem extends to the cup, and the inner end of the valve stem is provided with a baffle, the baffle flat on the inner surface of the cup, the baffle is provided with a plurality of air inlet adjusting holes, and the corresponding cup is provided with a plurality of air vents.