Doomsday Bunker Upgrade

Holding the hammer from the workbench, Chen Xin tapped the ice in the bunker one by one, gasping for breath.

Leaning on his waist, Chen Xin leaned against the wall in the bunker and took a deep breath. Although the oxygen content in the shelter has always been high due to the existence of oxygen generators and planting greenhouses, this location can actually be regarded as the outside world. After Xin just de-iced, he couldn't help but feel short of breath and breathless.

Reaching out his hand, he took out an oxygen bottle from his pocket, opened the protective mask on his face, and took a few breaths into his nose and mouth. Chen Xin, who felt much better, put on the protective mask again and straightened up.

"Huhu, when will this be a head!" Chen Xin couldn't help but sigh, after the accumulation of ice is thick, it is not at all that the small hammer in his hand can knock it down. .

This inevitably made him feel a little frustrated. De-icing is not an easy job. It's not like shoveling snow, how can it be cleaned up with a shovel.

But ice, especially frozen ice, is very difficult to clean. In the past, if it was frozen in many places, the snow and ice would not melt until the spring.

But now Chen Xin can't wait until the temperature rises and spring flowers bloom, and the ice has melted by itself. He must find a way to remove the ice that is at least thirty centimeters thick in front of him.

To be honest, he had expected that there would be ice accumulation, and he knew that it would be more serious if the ice accumulation was not carried out for a few days, but he did not expect that the ice would have frozen a foot thick.

Such a thick accumulation of ice, even with a professional ice axe and iron fiber, is difficult to clean up with a large hammer, not to mention that Chen Xin only has a small hammer in his hand.

I took a hammer and smashed it on the ice a few more times, but it seemed to be effective. Except for a little bit of ice slag, there was not even a crack on the ice.

This made Chen Xin frustrated and lamented in his heart. It would be great if there was any way to solve the ice accumulation at one time. It would be even better if the ice accumulation problem at the vents could be further and completely solved.

How easy is it to just want to solve a problem? Chen Xin smiled wryly, and smashed the ice with a hammer again.

While smashing, Chen Xin was also thinking about how to solve the problem of ice accumulation.

The main reason for the formation of ice accretion is that the air blown out of the shelter by the vent contains water vapor, which quickly condenses and sinks after being cold, and freezes into ice before flying out, and then accumulates here.

This can be seen from Chen Xin knocking ice cubes for a long time, and the surface of the protective clothing on his body is frozen.

Patting off the icing on the surface of the protective suit, Chen Xin sighed. Although he knew the principle, it is not a matter of upgrading the ventilation system to remove the moisture from the air blown out of the vent.

To remove moisture from the air, Chen Xin does know the method, that is, air drying, but this is mainly a technology used in industrial production. It is too wasteful to use it for ventilation and exhaust in shelters, and it consumes a lot of money. .

So in Chen Xin's vision, it is enough not to freeze in the small bunker.

In this case, improving the ventilation form of the exhaust vents, or adjusting the structure of the small bunker and changing the vents to the outside can also solve the problem.

However, Chen Xin was reluctant to change the vent to the outside, because in that case, the temperature of the air blown from the vent would be significantly higher than the ambient temperature. Although it could not be seen with the naked eye, with an infrared telescope, the vent would be in harmony with the ambient temperature. The searchlight is as conspicuous in the dark night.

Moreover, although the vents are not as easy to climb in as in European and American movies, they will still cause many problems if they are discovered.

Now put it in a small bunker. Although there is a possibility of being discovered, it is still much less dangerous.

So to solve the problem, it is best to find a way to make the water vapor not freeze into ice in the small bunker.

Chen Xin thought hard, and suddenly a hammer fell, and a flash of light in his mind finally opened his mind.

"I'm really stupid. I can't use the system to upgrade!" Chen Xin slapped himself on the forehead, secretly annoyed that his mind was confused in Qin Lan's place these days, but he didn't think that he could still use it. System upgrade to solve the problem.

Chen Xin called out the system interface, glanced at the four-digit survival points that had been accumulated on it, and had enough confidence in his heart.

These survival points are prepared by Chen Xin to upgrade the shelter as a whole. He used up some points when manufacturing the ground source heat pump, but he has not been at home for a few days, but there are not many survival points obtained every day. Nearly 40 survival points per day The point income makes it easy for him to come up with survival points to transform and upgrade the small bunker.

"Humble observation room"

"Upgrade plan 1: Increase the area of ​​the observation room, improve the building structure, increase the concealment and air permeability, enhance the signal receiving ability of the short-wave antenna, and upgrade the required survival points 700"

"Upgrade plan 2: Improve the defense capability of the observation room, improve the building strength, increase the thermal insulation protection performance, increase the protection of the observation port, and upgrade the required survival points by 1100"

The two upgrade plans are not very cheap, and the emphasis is still different. However, due to the lack of construction materials, and the existing materials are prepared for the overall upgrade of the shelter, Chen Xin did not use both. way to upgrade.

After comparing the two schemes, he still chose to spend 700 points to upgrade the first scheme, which is to enhance the concealment and ventilation performance of this small bunker, and at the same time, he can also improve the shortwave antenna installed here. signal reception capability.

Although Chen Xin also wanted the second plan, the survival points should not be consumed too much. After hesitating for a while, he gave up this upgrade option, which was obviously to evolve the small bunker into a bunker.

After the upgrade, the area of ​​the small bunker has increased, and the overall appearance is a perfect circle, but it has not expanded too much. The observation port is still the same as it was, and it has not changed.

It's just that the original vent in the room has become a ventilation duct buried in the wall, which will be ventilated through the facade of the small bunker.

This obviously solves the problem of ice accumulation in the room at the vent, and because the ventilation pipe runs through the outer wall of the observation room, the air coming out of the ventilation port will first reduce the temperature in the ventilation pipe and then be discharged. In the infrared viewing angle, it is not so obvious.

Regarding this point, after the upgrade, Chen Xin came out of the gate of the shelter and used the infrared vision function of the tactical eyepiece to observe the position of the observation room. Indeed, he couldn't see any traces of the air discharged from the vent. .