Double-bag separate control type positive pressure oxygen breathing circulation air storage device

Abstract

The invention relates to the technical field of personal respiratory protection, in particular to a double-bag separate control type positive pressure oxygen breathing circulation air storage device, and aims to overcome the defects of an air bag or a breathing cabin assembled in an isolation type positive pressure oxygen respirator in the prior art. According to the double-bag separate control type positive pressure oxygen breathing circulation air storage device, a design structure that an expiration bag and an inspiration bag are separately regulated and controlled and tension springs are arranged in the air bags to axially pull and retract to guarantee positive pressure is adopted, a system is always kept at positive pressure when the air storage device is assembled in the isolation type positive pressure oxygen respirator, and therefore the breathing comfort performance can be improved, the breathing protection time can be prolonged, the physical ability and the physical and psychological health of a wearer can be effectively guaranteed, and the working efficiency in fire rescue and toxic and harmful working environments can be improved. The device is mainly characterized by being composed of the expiration bag, the inspiration bag, a double-bag separate control partition plate, the tension springs in the air bags and an air bag supporting frame.

Description

technical field [0001] The invention relates to the technical field of personal respiratory protection, in particular to a dual-capsule separately controlled positive pressure oxygen breathing cycle gas storage device. Background technique [0002] The low-pressure gas storage part of the isolated positive pressure oxygen respirator is divided into air bag type according to the provisions of my country's current industry standard MT867-2000 "Isolated Positive Pressure Oxygen Respirator" and XF632-2006 "Positive Pressure Fire Oxygen Respirator" And breathing chamber type two types. [0003] The low-pressure gas storage part of the existing isolated positive pressure oxygen respirator, whether it is the air bag type or the breathing chamber type, adopts a single bag or single chamber structure, so that the comfort and protection time of exhalation and inhalation are all subject to the same The gas pressure and limited volume in the bag (chamber) itself restricts the overall pe...

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Problems solved by technology

[0003] The low-pressure gas storage part of the existing isolated positive pressure oxygen respirator, whether it is the air bag type or the breathing chamber type, adopts a single bag or single chamber structure, so that the comfort and protection time of exhalation and inhalation are all subject to the same The gas pressure and limited volume in the bag (chamber) itself restricts the overall performance of the positive pressure oxygen breathing cycle: by increasing the gas pressure in the bag (cabin), the positive pressure in the system can be fully guaranteed and the inhalation is comfortable , but at the same time, the exhalation resistance increases, the exhalation is not smooth, and there is even a feeling of suffocation; in order to reduce the exhalation resistance and improve the exhalation comfort, it can only be achieved by reducing the gas pressure in the bag (cabin), but Exhaled recyclable gas and supplemented fresh oxygen will be exhausted and lost too frequently, resulting in a decrease in gas cycle utilization, shortened protection time, and even instant negative pressure; existing positive pressure systems generally use airbags or breathing Two to three metal positive pressure springs are arranged outside the cabin, and pressure is applied to it by compressing a pressure plate to maintain the positive pressure in the system. Due to factors such as the vibration of the external positive pressure spring and the offset of the axial pressure centerline of the pressure plate during wearing and operation , will affect reliability and stability

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