First, I believe many people know that astronauts will float in the air when urinating, and they can't control their own trajectory when urinating. If they encounter an embarrassing situation, they are likely to make a mess of themselves. In the early days, there was a long tube in the space station to help astronauts solve physiological problems. As long as the pipes are aligned, the negative pressure in the pipes can suck away urine and prevent urine from flowing around. Before entering the space station, astronauts have made all preparations on land, and they have also accepted various professional drills to prevent future problems.
2. In the early days of the construction of the International Space Station, professional researchers took great pains to solve the problem of astronauts going to the toilet. In the early days, astronauts could solve the problem of defecation by sealing bags. Today, a special toilet was installed in the space station. Although it is cleaner and more hygienic to use, you must pay attention to safety during use to avoid the body being bounced off by reaction. Astronauts' toilets are very expensive, nearly $20 million each, which is equivalent to the price of buying a house. Because of the limited space of the space station, the weight and volume of the structure, etc. The requirements for the bathroom are very high.
Third, the design of space urinal is very clever. Every astronaut will get a private funnel-shaped urinal, which is connected to a hose connector. When the astronaut urinates, the fan sucks the urine into the urinal. Green explained that male and female astronauts have different urination devices. In fact, the female urinal is simpler and easier to operate. They can use urine devices that directly touch the body, which is more difficult for male astronauts. They must put the urine device close to the body, and they can collect urine, but not very close, so as not to damage the organs by inhaling the device.