Structure of spacesuit

Spacesuit is structurally divided into six layers: underwear comfort layer, thermal insulation layer, ventilation suit and water cooling suit (liquid cooling suit), air tightness limiting layer, thermal insulation layer and outer cover protection layer. Helmets, gloves, boots, etc. It also matches the spacesuit.

In a vacuum environment, nitrogen contained in human blood will become gas, which will expand the volume. If people don't wear pressurized and sealed spacesuits, their lives will be in danger because of the great difference in air pressure between inside and outside. Space suit is a multifunctional suit developed on the basis of pilot's closed suit.

Early spacesuits could only be used by astronauts in the cockpit of spacecraft, and later spacesuits for extravehicular use were developed. Modern new extravehicular spacesuit has liquid-cooled structure, which can be used for astronauts to leave the cabin or explore the moon.

Extended data:

The oxygen tank of the spacesuit provides oxygen for the astronauts. The discharged carbon dioxide is absorbed by lithium hydroxide. The surface of spacesuit has the function of blocking radiation. The astronaut's body temperature is regulated by a set of underwear, which is covered with water pipes. The water pump continuously circulates water, taking away the tropical heat emitted by the astronauts' bodies, while the water is cooled by the sublimator.

The last important function of spacesuit is to provide astronauts with the required air pressure (about half of the standard atmospheric pressure of 52kpa); If the air pressure is too low, the gas in human blood and body tissues will leave, causing astronauts to suffer from diving diseases similar to those of divers (in a vacuum, astronauts may even die because of the instantaneous "boiling" of blood).

Baidu encyclopedia-spacesuit