The Refrigerador
We use the process of refrigeration for very many things.
Refrigeration has been around even before the refrigerador. People in the old days would dig holes in the ground, place the items that they wanted to keep cold and then cover the hole with snow.
The major improvement was the refrigerador going from a small machine that was hard to work to a larger, plug-in machine.
Another major improvement was when two men discovered deadly Freon being emitted by the old refrigeradors and they made a better model that had less emmision of Freon.
As you can see, there are many different kinds of refrigeradors, like wine coolers, supermarket, open doors refrigeradors.
The sites I used for my presentation
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