The year was 1939, and the automaker Packard decided that they will be the automobile manufacturer to install an air conditioning unit the vehicles that they produce but for numerous reasons this did not take off and one of the main ones was that installing this invention in a vehicle was simply ahead of its time.
Fast forward about 14 years and you get to the firs mass produced vehicle with an AC unit aboard called Airtemp.
In the years to follow manufacturers of high end automobiles started to compete with who would make the most efficient unit and pretty soon, this became standard equipment in the modern automobile.
These days there is almost no vehicle manufactured without AC, apart from special version that are focused so hard on lap times, that the added weight from the compressor unit is sacrificed for a faster lap around the Nürburgring in order to break the record for its class.
But do we all know how it works?
Well in principle this is the same design as the refrigerator except that the vehicle unit is a lot more powerful.