Refrigeration is the process of creating cooling conditions by removing heat from any object. This process is most frequently being used to preserve food and perishable items. Method for preserving food by cooling has been around the thousands of years and the invention of the modern refrigerator did not happen in one day, it was a gradual process.
In around 1000 B.C. the Chinese cut and stored ice whereas Indians learned to leave earthenware pots out during the cold night to make ice. The concept of mechanical refrigeration began when a Scottish doctor Mr. William Cullen observed that evaporation had a cooling effect in the 1720s. After that many efforts had been made to built and improve refrigeration technology. The popularity of commercial refrigeration technology grew toward the end of the 19th century.
Commercialization of refrigeration technology made a competition between their manufacturers, some of the manufacturers were providing fast cooling whereas some of them providing energy efficiency. But in between 1990 to 2000 companies started to apply the internet of things to home appliances like refrigerators. Some manufacturers were also included cameras to monitor food items where users can monitor it by using the internet on their mobile phones. After that most manufacturers are moving to make intelligent and more efficient refrigerators. And the smart refrigerator is a result of this competition.