Positive pressure type breathing mask

Abstract

The invention discloses a positive pressure type breathing mask. The positive pressure type breathing mask comprises a mouth and nose cover. An air supply system which can supply air into a breathing cavity in the mouth and nose cover is arranged in the mouth and nose cover. The air supply system mainly comprises an air inlet connector, an air inlet valve and an air inlet valve opening device, wherein the outer end of the air inlet connector is connected with an air pump or a pipeline air source, and the inner end of the air inlet connector is connected with the air inlet of the air inlet valve. The air inlet valve is composed of a valve body, a valve element and a reset spring, wherein the valve element is movably arranged in the valve body, the valve element abuts against and seals the air outlet of the valve body through the reset spring, and the head of the valve element extends out of the valve body and enters the breathing cavity. The air inlet valve opening device pushes the valve element to contract inwards to make the air outlet of the valve body communicated with the breathing cavity only when the pressure in the breathing cavity is reduced. According to the positive pressure type breathing mask, air outside a severe environment is directly used as an air source, safety of the air source is ensured, the defects of an existing mask are effectively overcome, the positive pressure type breathing mask can be used in any environment, and the breathing safety of workers in the severe environment is ensured.

Description

technical field [0001] The invention relates to a protective mask for providing compressed air outside harsh environments, in particular to a positive pressure breathing mask. Background technique [0002] The air in a harsh environment contains dust and toxic gases. The existing ordinary masks can block dust but cannot block toxic gases. Filter masks can block dust and specific toxic gases, and cannot be used for unknown toxic gases or multiple toxic gases. Protect personal safety. Contents of the invention [0003] In view of the above problems, the present invention designs a positive pressure breathing mask, which directly uses the air outside the harsh environment as the air source to ensure the safety of the air source, effectively makes up for the deficiencies of the existing masks, and can be used in any environment. Ensure the breathing safety of staff in harsh environments. [0004] To achieve the above object, the present invention adopts the following technic...

AI Technical Summary

Problems solved by technology

[0002] The air in a harsh environment contains dust and toxic gases. The existing ordinary masks can block dust but cannot block toxic gases. Filter masks can block dust and specific toxic gases, and cannot be used for unknown toxic gases or multiple toxic gases. Protect personal safety

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