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Mine disasters are frequent.All most are caused by suffocation of harmful gases.That we conduct in-depth transformation of the helmet’s design and add a face mask in the position of the light.On both sides of the mask are good elastic tapes with adjustable silicone tubes .Lift one is transmission channel of oxygen to other masks,while the right one is transmission channel of carbon dioxide. Besides,through the right tubes,the exhalent carbon dioxide can flowfreely inside the helmet.There is chemical reaction of sodium oxide and carbon dioxide inside the helmet.As a result,the generated oxygen can flow back to the mask through the left pipe.
Shi Ran Liu Chenming Hu Zuochen Zhang Zun