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created
the first artificial refrigeration machine was made by creating a partial vacuum over the items to keep them cool -
cooling with vapor
refrigeration with air vapor was invented, using ammonia -
household items
they then became common household items -
put motor on top
fridge motors used to be located in separate rooms, to free up more space they put it all in one -
added a freezer
to free up ore space in the house they combined the fridge and freezer -
new color
they made new fridges with different colors -
added a despenser
they added an ice dispenser -
drawers
they added drawers to have better access to its contents -
turned upside down
they put the fridge on top and the freezer
