where did the first Air conditioner come from you might ask well lets get in to it?
since prehistoric times ice and snow was used for cooling. we used to harvest ice and snow in the winter and then we would store the ice and snow for use in summer.
This basic concept had been used in ancient Egypt where reeds where hung in windows and where moistened with trickling water. The evaporation of water cooled the air blowing in the window this also made the air more humid which can be beneficial in dry climates. in ancient Rome water from aqueducts was circulated through the walls of houses to cool them.
Mechanical air conditioning
in 1902 American inventor Willis Carrier invented the first large scale electrical air conditioning system the introduction of residential air conditioning. he did this by installing a fan in to a box along with a water sprayer when the dry hot air crossed the water this cooled down the hot air and raised the humidity. by doing this he was able to control the humidity and air temperature of an occupied space.
it wasn’t until 1758 when Benjamin Franklin and John Hadley a chemistry professor from Cambridge university started experimenting the principal of evaporation as a means of rapidly cooling down an object. They confirm that evaporation of highly volatile liquids such as alcohol and ether could be used to drive down the temperatures of an object past the freezing point of water.
The first air conditioning systems employed toxic gas as ammonia or propane that could result in fatal accidents when they were leaked Thomas Midgley created the first non flexible non toxic chlorofluorocarbons in 1928. modern refrigerants have been developed to be more environmental safe than many of the early chlorofluorocarbons based refrigerants.