Anti-asphyxia valve mechanism for airborne oxygen system

Abstract

The invention discloses an anti-suffocation valve mechanism for an airborne oxygen system, which is connected between oxygen source equipment and oxygen inhalation equipment. The oxygen source equipment includes main oxygen source equipment and emergency oxygen source equipment. The anti-suffocation valve mechanism Including shell, valve seat, valve cover, valve pressure spring, valve rod, return pressure spring and diaphragm, the upper, middle and lower positions in the shell are respectively provided with an upper inner cavity, a middle inner cavity and a lower inner cavity, and the membrane The piece is installed in the upper inner cavity to isolate it into the first upper inner cavity and the second upper inner cavity. The wall of the middle inner cavity is provided with an air inlet, and the valve seat is installed on the upper part of the lower inner cavity. The spring is placed in the first upper inner cavity, the upper end of the valve rod is connected with the middle part of the diaphragm, and the lower end of the valve rod is provided with a valve rod plug. The present invention as a whole solves the problem of suffocation caused by inhaling oxygen from different oxygen sources or when there is no oxygen when the user inhales oxygen through the same oxygen inhalation device such as a breathing mask, and at the same time does not affect the normal inhalation of oxygen from the main oxygen source at all.

Description

technical field [0001] The invention relates to a partial device of an airborne oxygen system, in particular to an anti-suffocation valve mechanism for the airborne oxygen system. Background technique [0002] The airborne oxygen system is an oxygen gas supply system for users to inhale oxygen on an aircraft such as an aircraft. With the development of the airborne oxygen system, more and more local equipment has been developed and applied, such as for preparing high-concentration Oxygen production equipment for oxygen, mixing equipment for mixing oxygen with air, oxygen inhalation equipment for users to inhale oxygen, etc. [0003] At present, there are two sources of airborne oxygen, one is the oxygen from the main source of oxygen, which is generally the oxygen produced by the oxygen generator, which is the main source of oxygen on the aircraft, and the other is the oxygen stored in the oxygen tank. Emergency oxygen source, generally referred to as emergency oxygen sourc...

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Problems solved by technology

[0006] However, it is not possible to simply connect the two oxygen source equipment to the same breathing mask and add a switch in a conventional way to switch. This is because: because the oxygen concentration in the main oxygen source is appropriate, the air supply flow is appropriate, and the user can directly inhale it. But there is no discomfort; but the oxygen concentration in the emergency oxygen source is high, so in order to adapt to the normal oxygen intake of the human body, the air supply flow is generally reduced, and the user will have a certain suffocation when inhaling directly, which reduces the use of oxygen. comfort; additionally, severe suffocation of the user can occur if oxygen from both sources is reduced or stopped

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