Experimental Study On Micro-circumstance Regulating In Life Sustaining System Under The Conditions Of Airtight Cabin

In modern high technical wars, there is less and less opportunity for personnel directly exposing to exoteric air, they are usually disposed in cabins of various campaign and transport equipment. The cockpits or passengers'cabins of armored vehicles, aircrafts, naval vessels, and cabins of transportation-troops-facilities by land, water, or air are in a comparatively airtight state when fighting or cutting across nuclear, chemic, biologic tainting areas, the inner air isn't current and exchanges with outer air are extremely few, otherwise personnel themselves, engines, firepower systems, deployed equipment, etc, all can release vast poisonous and deleterious gas, so there are not only essential component such as oxygen, nitrogen and vapor, etc, but also deleterious chemic matter in the cabins'micro-circumstance. After appreciably long time, quality of the air in the cabins get worse gradually, concentration of oxygen dropps rapidly, and concentration of carbon dioxide heightens rapidly.Physiological gas participate in physiological activity, oxygen and carbon dioxide both belong to this sort. Oxygen comes from external, carbon dioxide is the metabolic production of body, they both participate in relational important vital activity. The three sorts of nutriment as the origin of bodily matter and energy is all oxidized and decomposed under the action of oxygen in tissue and cell, finally produces carbon dioxide, releases energy from this course; oxygen and carbon dioxide accommodate respiration and circulation through nerval and chemic mechanism, thereby guarantee smooth process of various bodily functional activity. Man has completely adapted to the oxygen content of atmospheric circumstance at sea level after perennial evolution, when tissue and cell can't gain necessary oxygen for metabolic activity, anoxia will be engendered, it consists in human being's living and work widely, bring different degree of anoxic harm. The effect of carbon dioxide on human body has dualism:on the one hand, when its content exceeds 2KPa(15mmHg), it will bring toxicity action such as headache, naupathia, etc, called hypercarbohemia, known as deleterious gas; on the other...