At that time, the printing industry developed rapidly, but the change of temperature and humidity in the workshop air would make the expansion and contraction of paper unstable, thus making the printed products unqualified.
At first, the machine was so big that the family couldn't put it down, so the printing company found a young American engineer, willis carrier. Born in 1876, he is the son of a farm. He successfully obtained a degree in mechanical engineering from Cornell University, a famous university. He works for Buffalo Forging Company, which produces heating and exhaust systems. In fact, he studied heating at first.
190 1 the summer in America was very hot, and the owner of the printing house was very upset about it. Because of the poor printing effect caused by high temperature and humidity, the boss found Willis Carrier who had helped them install heating before. The boss probably thinks that if it can be hot, it can be cold.
At that time, air-conditioning propaganda, since the invention of fire in human society, has realized the transformation from cold things to heat, but conversely, the transformation from heat to cold has become a big problem for thousands of years. After Carrier's thinking, it is considered that since the pipeline filled with hot steam can warm the air temperature, changing the steam back into water can reduce the temperature, not only reduce the temperature, but also dry the air. This is the prototype of modern air conditioning. 1902, the world's first fashion was born, and other cold weapon industries began to develop one after another, such as chemical industry, pharmaceutical industry, textile industry and food processing.
Carrier and his machine, carrier also got the first patent in life, so in the first twenty years of the birth of air conditioning, because the refrigeration cost was too high, it was machines, not humans, who enjoyed air conditioning. 1922, Kaili successfully developed a more efficient rational cooler. 1924, the Hudson department store in Detroit installed three air conditioners, and the cool environment improved the performance of the department store.