Chapter 151

With the hammer from the workbench, Chen Xin hammered the ice in the bunker, and couldn't help panting.

Leaning on his waist, Chen Xin leaned against the wall of the shelter and inhaled deeply. Although the oxygen content in the shelter was not low because of the existence of the oxygen generator and the planting greenhouse, this position was actually outside. After Chen Xin Gang had just deicing, he could not help feeling short of breath.

He reached out and took out an oxygen bottle from his pocket, opened the protective mask on his face and took a few puffs at his nose and mouth. Chen Xin, who felt much better, put on the protective mask again and straightened up.

"Hoo hoo, it's going to take a long time." Chen Xin can't help feeling that after the ice is thick, it's not the small hammer in his hand that can knock it. If he smashes it hard, he will knock some ice debris down.

This makes him feel a little frustrated. De icing is not an easy job. It's not like shoveling snow. How can you clean it with a shovel.

But the ice, especially the frozen hard 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 the ice melts. He has to find a way to remove the ice that is at least 30 cm thick.

To tell the truth, he had expected that there would be ice accretion, and he knew that ice accretion would be more serious in a few days, but he didn't expect that the ice would have frozen a foot thick.

It's very difficult to clean such thick ice, even with professional ice pick and iron fiber, even with a sledgehammer. What's more, there is only a small sledgehammer in the novice Chen.

He took a hammer and hit a few more on the ice, but it seemed to have a good effect. Except for a little ice debris, there was not even a crack on the ice.

Chen Xin can't help but feel depressed. He laments in his heart that there is no way to solve the problem of ice accretion at one time. It would be better if he could further solve the problem of ice accretion here.

How can it be so easy just to solve the problem? Chen Xin gave a wry smile and smashed it on the ice with a hammer.

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

The main reason for ice accretion is that the air blown out of the shelter by the vent contains water vapor, which condenses and sinks rapidly when it is cold. It has frozen into ice before it flies out, and then accumulates here.

This can be seen from the fact that Chen Xin has been pounding ice for a long time and his protective clothing is covered with ice.

Chen Xin sighed when he photographed the ice on the surface of the protective clothing. Although he knew the principle, it was not a matter of upgrading the ventilation system to remove the moisture from the air blown out of the vent.

In order to remove moisture from the air, Chen Xin does know the method, that is, air drying. However, it is mainly a technology used in industrial production. It is too wasteful and expensive to use in the ventilation and exhaust of shelters.

So in Chen Xin's idea, it's enough to just not freeze in the small body.

In this case, improving the ventilation form of the exhaust outlet, or adjusting the structure of the small shelter to change the outlet to the outside can also solve the problem.

But Chen Xin is reluctant to change the vent to the outside, because in that case, the air temperature from the vent will be significantly higher than the ambient temperature. Although it can't be seen by the naked eye, with an infrared telescope, the vent will be as conspicuous as the searchlight in the dark.

And although the vent is not as easy to climb in as it is in European and American movies, it will still cause a lot of problems if it is found.

Now put it in a small bunker. Although it may be found, the danger is much less.

So to solve the problem, it's better to find a way to make the water vapor form ice in the small body.

Chen Xin thought hard, suddenly a hammer hit, brain flash, finally opened the mind.

"I'm so stupid. I'm just going to upgrade my system!" Chen Xin slaps himself on the forehead. He is annoyed that he is confused in Qin Lan's mind these days. He doesn't even remember that he can use the system upgrade to solve the problem.

Chen Xin calls out the system interface and takes a look at the four digit survival on it. He has enough confidence in his heart.

These survival points are prepared by Chen Xin to upgrade the shelter as a whole. He used to consume some points when manufacturing ground source heat pumps, but he has not been at home these days, so he has gained a lot of survival points every day. With the income of nearly 40 survival points every day, he can easily take out the survival points of upgrading the small bunkers.

"Simple observation room"

"upgrade scheme 1: increase the area of observation room, improve the building structure, increase the concealment and permeability, enhance the signal receiving ability of shortwave antenna, upgrade the required survival point 700"

"upgrade scheme 2: improve the defense ability of observation room, improve the building strength, increase the heat insulation protection performance, increase the protection of observation port, upgrade the required survival point 700"

"upgrade scheme 2: improve the defense ability of observation room, improve the building strength, increase the heat insulation protection performance, increase the protection of observation port, upgrade Cundian 1100 "

the two upgrading schemes are not very cheap, and the emphasis is still different. However, because of the lack of building materials and the fact that the existing materials are all prepared for the overall upgrading of the refuge, Chen Xin did not upgrade in the way of both.After comparing the two schemes, he chose to spend 700 points to upgrade the first scheme, which is the option to enhance the concealment, ventilation and air permeability of the small shelter. At the same time, he can also improve the signal receiving ability of the shortwave antenna installed here.

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

After upgrading, the area of the small bunker has increased a little, showing a round shape as a whole, but it has not expanded too much. The observation port is still the same as before, and has not changed.

It's just that the original vent in the room becomes the ventilation pipe buried in the wall, which will be ventilated through the facade of the external wall of the small bunker.

This obviously perfectly solves the problem of air vent icing in the room, and because the air vent goes from the exterior wall of the observation room, the air from the air vent will first lower the temperature in the air vent and then exhaust, which is not so obvious from the infrared perspective.

For this point, after the upgrade, Chen Xin came out from the gate of the shelter and used the infrared visual function of the tactical eyepiece to observe the position of the observation room. He really couldn't see the trace of the air discharged from the vent.

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