Respirator

Abstract

The invention discloses a respirator. The respirator comprises a gas cylinder. The gas cylinder is fixed to a back support through a binding band. A back belt assembly is connected to the back support. The gas cylinder is connected with a gas supply valve through a cylinder head main valve, a pressure reducer and a medium pressure tube. A full face mask is connected to the gas supply valve. A transparent window lens is installed on the front face of the full face mask. A lens is arranged below the transparent window lens. A port and a port cover which are connected with the gas supply valve are arranged at the front end of the full face mask. A head-up display device is installed at the position, away from one end of the full face mask, of the bottom of the gas supply valve. A tubular dust prevention light shading hole is formed in the gas supply valve or the full face mask. The respirator has the advantages that the respirator is convenient to use and practical, users can conveniently know more accurate information at any time, operational data are clear at a glance, the full sealed design is adopted in a light shading dust prevention device, the smoke blocking, dust prevention and light shading functions are achieved, and the users can clearly see the displayed content even under the low display brightness without being affected by ambient light intensity.

Description

technical field [0001] The invention relates to the technical field of firefighting equipment, in particular to a head-up display device on an air supply valve and a respirator with a pipe shading and anti-smoke device. Background technique [0002] The current positive pressure air respirator can be widely used in fire-fighting, chemical industry, metallurgy, miners, petroleum and other polluted areas, fire scenes, rescue measures and maintenance work in other possible oxygen-deficient areas. It is designed to protect users from toxic gases, toxic particles and aerosols, anoxic environments with an oxygen content below 15%, smoke caused by fires, and other harsh working environments. It is a kind of life-saving equipment for fire extinguishing, emergency rescue and rescue work safely and effectively in various environments such as hypoxia. [0003] At present, positive pressure air respirators mainly include gas cylinders, full-face masks, pressure display devices and alar...

AI Technical Summary

Problems solved by technology

[0004] The wired head-up display terminal is generally set on the air supply valve, and its LED position is close to the connection interface between the air supply valve and the full face mask. It is relatively forward, and the longest distance between the LED light and the eyes is less than 120mm , generally within 100-110mm; most of the head-up display terminals connected wirelessly are set inside the full-face mask, and the distance between the LED and the eyes is less than 80mm. The current air supply valve and full-face mask for respirators are not yet aimed at head-up display. The light-shielding and anti-smoke hole structure of the display device will cause the user to be affected by ambient light and smoke when observing the head-up display device, resulting in unclear or impossible to see the display content, thereby affecting the decision-making of the user and also affecting Rescue work

However, the optical characteristics of the tapered or wedge-shaped full-face masks are not humane enough, and the appearance is not beautiful enough, and the weight is about 40% heavier, reaching 700 grams, while the ordinary mask is only 500 grams, which makes the wearer more prone to fatigue. Some power supply devices have complex structures, unreasonable installation positions, and complicated wiring lines. When wearing them, they are easy to cause winding. When using them, it is slow to replace the battery, which poses safety hazards and is not convenient to use.

[0005] The Chinese patent No. 201220007351.1 of the reference document discloses an air respirator mask with display pressure. This pressure display device is arranged on the upper end of the full-face mask, and the pressure display device is located within the wearer's visual range. This type Although the air respirator mask of the company has added a pressure display device, which reduces the frequency of users checking the pressure gauge, the wirelessly connected head-up display terminal he uses is set on the upper part of the full mask, and the distance between the display device and the eyes is short. The user looks very strenuous, and is prone to visual fatigue, which affects the rescue work; at the same time, the pressure display scheme of the display part is too rough and inaccurate, and the pressure cannot be directly displayed digitally, which is not convenient for the user to accurately determine the specific value of the pressure , and the displayed information is relatively simple, which affects the user's work efficiency and affects the user or firefighters to quickly make decisions based on the information

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