Refrigeration And Air Conditioning Technology Better -

The development of mechanical refrigeration began in the 19th century. In 1805, Oliver Evans, an American inventor, designed a vapor-compression refrigeration machine that used vapor instead of liquid to cool. However, it was Jacob Perkins, an American inventor, who built the first practical refrigeration machine in 1834. Perkins' machine used a compressor to compress air, which then expanded through a valve to cool a surrounding container.