What is Iron Man's reactor?

Iron man's reactor is to provide him with energy.

Iron man's reactor is equivalent to the human heart, and the reactor on his chest provides him with energy, which is the source of iron man's survival. With this reactor, Iron Man can act normally, so this reactor is as important to Iron Man as the heart is to human beings.

This kind of reactor independently completes the controlled nuclear fusion, enabling it to fly freely in the sky without fear of powerful enemies.

Iron man's reactor source

Tony once came to a wasteland with an assistant and a military observer. In this wasteland, he showed them his latest research results, but at this time he was attacked by terrorists. Tony was hit by a stray bullet in the heart, but miraculously he woke up again. When he woke up, he found a strange device on his chest, which was the source of his life.

It turned out that Dr. Yingsen, who was also a hostage, used a car electromagnet to absorb the shrapnel in his body, thus saving his life. Later, Iron Man personally built his own armor, and this reactor also served as the energy source of armor to sustain life.