Emergency escape rebreather

Abstract

The invention discloses an emergency escape rebreather. The emergency escape rebreather comprises a compressed air bottle and a head shield, wherein an air bottle pressure reducing valve is mounted at the opening of the compressed air bottle; the air bottle pressure reducing valve comprises a valve seat and a piston seat mounted on the valve seat; a valve rod is arranged on the piston seat; a safety valve core is mounted on the piston seat; a safety valve spring is supported on the safety valve core; flow regulation bolt is arranged on a low-pressure connector; an alarm air passage is formed in the valve seat; the alarm air passage is led to an alarm whistle; the alarm air passage is positioned at a sealed upper part below a piston; the head shield is connected with a mouth-nose mask through a breather valve seat; an air chamber membrane is fixedly mounted on the breather valve seat through an air chamber membrane seat; an air chamber is formed between the air chamber membrane and an air supply pipe; the air chamber is communicated with an air channel of the air supply pipe through a by-pass port; a breathing membrane is further movably arranged on the breather valve seat; the position of a breathing hole in the breather valve seat corresponds to the breathing membrane. The emergency escape rebreather not only has a normal state leakage protection and air flow regulation functions, but also is comfortable and safe to use.

Description

technical field [0001] The invention relates to an air respirator for personal protection, in particular to an air respirator used by escapees in emergency situations such as fire, dust and toxic gas sites. Background technique [0002] Emergency escape air breathing apparatus is a personal respiratory protection device for escapees to escape from fire, dust and toxic gas scenes. The number of people burned to death is often only a small part of the number of fire casualties. Most of the deaths are caused by the following reasons. One is that they are trapped by thick smoke and lose the opportunity to escape, and then suffocate to death; If the victims can breathe high-quality air at the scene of the fire, so that their minds are clear, they will have enough time to choose the correct escape route to implement self-rescue escape. [0003] The air respirator for emergency escape is generally composed of a compressed air bottle, a cylinder pressure reducing valve located at ...

AI Technical Summary

Problems solved by technology

Such a structure has a large inhalation resistance of the inhalation valve, and at the same time, the exhalation valve cannot be closed reliably, causing harmful gases from the fire scene to be inhaled during the inhalation process, causing discomfort to the user at the slightest, and severe threaten the personal safety of users

At the same time, the overall weight of the existing respirator mask is relatively large, which increases the burden and discomfort of the user and increases the difficulty of use.

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