Respirator for use with protective clothing against heat - ensures comfortable breathing and satisfactory dispersion of metabolic heat

摘要

A respirator includes a bottle of a mixt. of a breathable gas including O2. It has a face mask with inlet and outlet ducts; there being a purifying cartridge in the outlet. A breathing sac in the form of a bellows has a first inlet from the gas bottle and a second inlet from the exhaling duct together with a first outlet connected to the inhaling line and a second providing an overflow. The mixt. of gas includes He and the inhaling line has a holder for a refrigerant. The volume of O2 is =20% and the volume of He is 40-60%. The refrigerant container is rechargeable and forms an annular cavity divided into channels through which the gas being inhaled flows. The appts. has an excellent cooling action, is of simple and light design, and is safe.