The origin of air conditioning (short answer)

188 1 One day in July, the 19 th president of the United States was shot dead at Washington Station. The security guard took him to the hospital for emergency treatment. After the operation, Gefield needs a period of careful care. However, it was too hot in the ward for the president to rest. What shall we do? The relevant departments entrusted the task of solving this difficult problem to a mining engineer named Dorsey. According to the principle of air expansion and heat absorption, Dorsey installed an air compressor in the hospital, which reduced the temperature of the ward from more than 30 degrees Celsius to below 25 degrees Celsius. This is the first air conditioner in the world. 19 1 1 year, Willis, USA? Carrier obtained a patent for the invention of air conditioning. From 65438 to 0902, he studied the regulation of air humidity in a printing factory in Brooklyn, new york. After several years of research, he finally designed an air conditioner with water spray filter in 1904. Carrier made persistent efforts. In 19 1 1, he drew the temperature curve used in the design and calculation of air conditioning equipment. Carrier is famous for this. 19 1 1 year, the first air-conditioned cinema was built in Chicago. In the same year, an air-conditioned department store named Abraham and Strauss opened in Brooklyn, new york. 1926, Americans Shuci and Sherman began to develop independent household air conditioning equipment. 193 1 year, they applied for a patent for window air conditioning.