Positive-pressure firefighting air breather

Abstract

The invention discloses a positive-pressure firefighting air breather. The positive-pressure firefighting air breather comprises an air bottle 1, wherein the air bottle 1 is fixed on a base; an air bottle 2 is additionally fixed on the base; an electromagnetic valve is mounted in the communicated position of the air bottle 1 and the air bottle 2; the air bottle 1 and the air bottle 2 are fixed on a back plate by a fixed belt connected to the middle of the back plate; a carbon dioxide concentration sensor and a pressure sensor for detecting the pressure of air in the air bottle 1 are arranged at the bottom of the air bottle 1, and are both connected with a microcontroller; the microcontroller is additionally connected with a power supply module for supplying electricity and the electromagnetic valve; and the microcontroller and the power supply module are both fixed in the base. The positive-pressure firefighting air breather solves the defect of easy explosion in rising of the environmental temperature of a traditional positive-pressure firefighting air breather, and can realize the circulating oxygen supply.

Description

technical field [0001] The invention belongs to fire-fighting and life-saving equipment, in particular to a positive-pressure fire-fighting air respirator. Background technique [0002] Positive-pressure fire-fighting air respirators are mainly used in fire-fighting, chemical industry, shipbuilding, petroleum, smelting, factories, mines, laboratories, etc., so that firefighters or emergency rescue personnel can work in harsh environments full of smoke, poisonous gas, steam or lack of oxygen. Carry out fire fighting, emergency rescue and rescue and ambulance work safely. [0003] The disadvantages of existing positive pressure fire-fighting air respirators are: due to the high working pressure of the gas cylinder, when it is in a harsh environment with high temperature, the gas cylinder is under a lot of pressure due to the thermal expansion effect, and there is a certain potential safety hazard; On the other hand, the capacity of the gas cylinder is limited. As the use time...

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Problems solved by technology

[0003] The disadvantages of existing positive pressure fire-fighting air respirators are: due to the high working pressure of the gas cylinder, when it is in a harsh environment with high temperature, the gas cylinder is under a lot of pressure due to the thermal expansion effect, and there is a certain potential safety hazard; On the other hand, the capacity of gas cylinders is limited. As the use time continues to increase, the oxygen in the cylinders will gradually decrease. Users can only use them normally if they frequently replace the gas cylinders.

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