METHOD FOR MONITORING THE RESIDUAL OPERATING LIFE OF AN INSULATING GAS MASK WITH CHEMICALLY BONDED OXYGEN AND APPARATUS FOR IMPLEMENTATION THEREOF Russian patent published in 2022 - IPC A62B7/08 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measuring equipment intended for use in personal protective equipment for the respiratory organs, and is aimed at increasing the accuracy of determining the residual operating life of an insulating gas mask with chemically bonded oxygen. Proposed method for monitoring the residual operating life includes the stages of placing an impeller and a temperature sensor in the breath line near the front of the gas mask; continuously counting the number of revolutions of the impeller and measuring the temperature of the breathing mixture when passing through the impeller; calculating the volumetric flow rate of the breathing mixture passed through the impeller; calculating and indicating the residual operating life. The volumetric flow rate is calculated with account to the temperature measured, not including the revolutions of the impeller made automatically when the direction of movement of the breathing mixture is changed in the calculations. Prior to calculating the residual operating life, the breathing intensity is determined, and the resulting volumetric flow rate is reduced to the same level with the nominal limit value thereof, with account to the nonlinear dependence of the flow rate on the breathing intensity. The reduced flow rate is compared with the nominal limit value calculated from the mass of the chemical substance in the regenerative canister. Proposed is a constructive variant of execution of an apparatus for the implementation of the method, characterised by high compactness, convenience, and ease of installation in insulating gas masks of various designs.

EFFECT: higher accuracy of determining the residual operating life of an insulating gas mask.

10 cl, 10 dwg