Pre-alarm air respirator

Abstract

The invention provides a pre-alarm air respirator. The pre-alarm air respirator is characterized in that the pre-alarm air respirator comprises a back frame, an air cylinder inserted into the back frame, a pressure reducer arranged on the back frame and connected with the air cylinder, a medium-pressure air guiding pipe arranged on the back frame, an air supply valve connected with the other end of the medium-pressure air guiding pipe, and a mask connected with the air supply valve, wherein the pressure reducer is used for lowering the pressure of compressed air in the air cylinder and providing air with reduced pressure for a user; one end of the medium-pressure air guiding pipe is connected with the pressure reducer, and the medium-pressure air guiding pipe is used for conveying compressed air with reduced pressure to the user for use; the mask is worn on the face of the user; the air supply valve is provided with a vibrator arranged on the air supply valve; when the pressure reducer outputs the stable preset pressure which is above the preset normal air pressure under the air source pressure in the air cylinder, the pre-alarm air respirator works normally; and when the pressure output by the pressure reducer is decreased to the preset minimum air pressure under the air source pressure in the air cylinder, the pressure reducer outputs the pressure which is above the preset output air pressure under the action of a piston and a spring which are connected in series, the vibrator on the air supply valve is driven to vibrate, and an early alarm is provided.

Description

technical field [0001] The invention relates to a pre-alarm device, in particular to a pre-alarm air respirator for warning of insufficient compressed air in the respirator gas cylinder. Background technique [0002] In firefighting, rescue and industrial fields, air breathing apparatus is a common equipment that provides respiratory protection for firefighters. It is a series of pressure-adjusted air supply devices through gas cylinders, bottle valves, pressure reducers, air supply valves, and masks. Supply firefighters with clean and safe air and protect the lives of firefighters. But existing air respirator basically all is to remind firefighters to evacuate the scene by alarm whistle sound or pressure head-up display device LED light display, and in some noisy environments, firefighters may not hear the sound that alarm whistle sends and pressure When the head-up display system is not working properly, it may be too late to evacuate to a safe place and inhale harmful ga...

AI Technical Summary

Problems solved by technology

But existing air respirator basically all is to remind firefighters to evacuate the scene by alarm whistle sound or pressure head-up display device LED light display, and in some noisy environments, firefighters may not hear the sound that alarm whistle sends and pressure When the head-up display system is not working properly, it may be too late to evacuate to a safe place and inhale harmful gas after knowing the gas source at that time, which will cause firefighters' lives to be in danger, which will bring certain unsafe factors to users

[0003] At present, commonly used air respirators have sound and light alarms, which are not suitable for use in some noisy environments, and when multiple users are together, if multiple alarm whistles sound at the same time, it will cause misunderstanding and cause misunderstanding in the pressure head-up display. When the power of the device is insufficient and cannot work normally, causing unnecessary trouble

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