UNDERWATER DIVING RESPIRATORY APPARATUS WITH SEMI-CLOSED CIRCUIT GAS RECYCLING

摘要

The subject of the invention is a half-closed circuit scuba diving breathing apparatus 1 comprising a breathing loop 2. The breathing loop 2 comprises a breathing bag 3 intended to be fed by at least one gas reservoir 4 and a recycling chamber 61. The gas reservoir is connected to at least one inlet of the breathing bag by a first conduit 11 and a second conduit 12 respectively comprising a demand regulator 110 and a fixed nozzle 120 configured to respectively deliver a first intake and a second supply of gas to the breathing bag 3. Advantageously, the apparatus comprises a third conduit 13 comprising a gas flow regulator 130 configured to deliver at variable mass flow a third gas supply to the breathing bag 3, and to the minus a dive condition sensor configured to measure a physiological parameter of the diver or the depth. The apparatus is advantageously configured to vary the variable mass flow rate as a function of a sensor data to optimize the gas consumption.