Compressor Mini

How do mini coolers work?

I don’t mean a refrigerator with a compressor. Its a little cooler that looks like a mini-fridge, but it says that there is no compressor. Yet the inside is cooled 20-25 degrees below room temp. How does this happen? Thanks.

Magic!

The “thing” is a peltier element or thermoelectric device
The device operates in a 4 quadrants. It will cool either side depending on the bias polarity. It will also produce electricity directly from heat.
Here is a few related blabla

http://www.google.ca/search?hl=en&q=thermoelectric+cooler&meta=&aq=1&oq=thermoelectric

http://www.google.ca/search?hl=en&q=thermoelectricity&meta=&aq=3&oq=thermoelectric

http://images.google.ca/images?hl=en&q=thermoelectric%20module&um=1&ie=UTF-8&sa=N&tab=wi

Hope this properly answers your question

Guru

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