Quote:
Originally Posted by Piwoslaw
Would salt+water=corrosion? Just guessing, maybe at those temperatures it's not a problem.
Here is how I defrost the freezer:
I wait for winter. When the forecast says it will be -10*C or lower in the morning I unplug the freezer in the evening. The inside usually doesn't get warmer than -10*C thru the night (starting at -20*C). Around 5am I take everything out and leave it outside, preferably in a place where local cats can't get at it. Leave the freezer door wide open and put a small standing fan in front. The circulation of air melts the ice 5-10 times faster, no scraping. After 1-2 hours the ice is gone, clean any debris, wipe clean, close door, turn on, 10-15 minutes later put stuff back in.
Very little work, and unplugging the previous evening allows you to save some energy by coasting until morning. The pulse stage is lowering the temperature of only the freezer, not what's in it. Using the fan takes some energy, but makes it much quicker.
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Look up home made ice cream recipes.
You put salt and water in the tub together, and that allows the ice to impart more of it's energy (cold) to the cream, bringing it below 32degF (the freezing point of water).
While doing so, of course, the salt acts as a catalyst upon the ice, melting it faster.
The basic idea is that as long as your freezer has a drain in it, and you can keep the water from damaging anything inside/outside the freezer, you could probably just put salt on the ice buildup a few times a day, and it would just melt on it's own. You might have to turn your freezer down a bit, but not so low that it won't keep your food frozen.