How could I scientifically explain ice breath?

I'm sure there have been questions on here about fire-breathing dragons, and I recently saw a question about a lightning-breathing dragon, but back in fifth grade I wrote a 150-page story about a dragon with ice breath, and now I'm starting to wonder if it would be possible without large amounts of magic.

My biggest problem is that while humans have had fire for millenia and electricity for over a century, it took a lot longer to come up with a way to generate significantly cold temperatures without using big blocks of ice. In fact, I'm still a bit confused about how refrigerators work.

So, I'm wondering, could an animal evolve to produce temperatures cold enough to freeze water and/or prey? And if so, how?

Any environment where this is possible is acceptable, though an answer that allows for a wide variety of Earth environments is preferable. Also, though I'm thinking dragons, if it's not possible for them but possible for another kind of animal, such information is welcome.

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How could I scientifically explain ice breath?

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