Self-contained open and closed circuit positive pressure air breathing apparatus

Abstract

The invention discloses a self-feeding channel-opened / closed positive pressure air respirator comprising a compressed air bottle, an all-face mask, a safety valve, a pressure-reducing valve, an air distributor, a ration air supply valve, an inhalation control valve, an exhalation control valve, an exhalation gas-guide tube, an inhalation gas-guide tube, an external connection rapid port, a clean pot, a Venturi tube valve, a cooling box, a gas temporary storage box, a purge valve, a triple valve, an air gauge, an alarm, a shoulder-hanged display gauge and an intelligent sound box. A fireman can safely use the self-feeding channel-opened / closed positive pressure air respirator for a long time. According to the self-feeding channel-opened / closed positive pressure air respirator, compressed air is used as a main air source, the service time of the limit compressed air can be prolonged in practical applications through cooperation with a carbon dioxide purifying and conversion device and a cooling system device, wherein the cooling system device is used for controlling the direction of air flow and branching the air flow. When a fireman rescue people in the scene of a fire, he can use the self-feeding channel-opened / closed positive pressure air respirator to protect himself in a danger, poisonous, high temperature and anoxic environment for enough time to rescue people or do other special tasks.

Description

Technical field [0001] The invention is applied in special work industries such as fire fighting, mine rescue, aerospace, chemical industry, submarine, diving, etc., as well as military anti-terrorism, nuclear, biological and chemical warfare and other fields, and especially relates to a self-contained open and closed-circuit positive pressure air breathing apparatus, which solves firefighters Other special workers who work or rescue in dangerous and toxic disaster sites, high-temperature fire sites, and anaerobic and oxygen-free environments can provide longer working hours than the prior art positive pressure air respirators and supply safe gas for human breathing need. Compared with the prior art positive pressure oxygen breathing apparatus, it can be used in high-temperature fire scenes or more complicated environments, and can provide human body with comfortable and safe gas needs. In special environments such as disaster sites, firefighters have more time to effectively p...

AI Technical Summary

Problems solved by technology

However, in practical applications, the existing closed-circuit positive pressure oxygen respirator cannot fully achieve the working time of four hours.

[0007] Closed-circuit positive pressure oxygen respirator has several major disadvantages: 1. The gas source is pure oxygen

2. It is difficult to obtain air source

This process of transferring irrigation and pressurization requires the careful operation of professionals, which is more dangerous than air pressurization

3. The full-face mask is foggy, and you can't even see the target in front of you.

Due to the limitation of the structure of the existing positive pressure oxygen respirator, the problem of large fog in the full face mask is difficult to solve

4. The structure is more complicated, and the application and maintenance are more troublesome

Therefore, sometimes due to imperfect cooling, firefighters feel the temperature of the inhaled gas is higher, and the human respiratory system will feel uncomfortable

7. If the exhaust gas containing carbon dioxide gas exhaled by the human body is not controlled, it will all enter the heat dissipation cleaning tank and react with chemical agents, which will generate a lot of heat and increase the burden on the cooling part

The carbon dioxide exhaust gas exhaled by the human body, after the reaction, all enters the gas temporary storage compartment. When the gas temporary storage compartment has too much storage, the gas is automatically discharged, resulting in waste

At the same time, because it is mixed with pure oxygen and discharged, there is a great safety hazard in the fire scene

[0008] Some positive pressure oxygen respirators also have several disadvantages: 1. Since the human body continuously exhales carbon dioxide-containing waste gas for a long time, the chemical agent that enters the quiet tank and reacts with it generates a large amount of heat. In order to reduce the heat

These schemes have reasonable parts and unreasonable parts, but none of them have been widely adopted

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