5) Next up I insulated the pipes where condensation forms directly from the compressor. I used inexpensive water pipe insulation from copyright or Home Depot to wrap all exposed parts that had potential for condensation.
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Know what your personal preferences are to determine the efficacy of owning a home freeze-dryer. Trying out some commercially freeze-dried food might help in this quest.
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4) I made a plastic shield to protect the main circuit board of the FDer. it simply slides into place and protects the top and both sides of the board from condensation.
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Because the freezing is fast, relatively few cell walls are ruptured which means it can be rehydrated with much less loss of quality.
Using sublimation, the food retains much of its original texture, flavor, and nutrition when rehydrated. Freeze drying is broken more info down into two simple processes: freezing and vacuum drying. Foods are first frozen to well below 0°F. The colder the freeze the more efficient the next step will be. Once frozen, foods are subjected to vacuum drying. The air and water vapor (gas) are removed from the food processing chamber using a vacuum pump. This includes removing the water vapor that was once inside of the foods. When these two steps are properly completed, the food is dry enough to allow for safe storage at room temperature. Is freeze drying food safe?
While I had the unit apart to replace the display I decided to correct the water condensation problem. If you find yourself using your FDer in the same conditons as we do you may want to consider modifying your FDer to keep the condensation from your FDer control circuit and display cards. Here are the steps that I followed to minimize what the NC high humidity climate does to my FDer.
Is it flash freezing and dehydrating at the same time? Do the items need to be kept frozen, or stored at room temp?
Run full system test with no food in chamber (results, 630 mTorr lowest steady reading - looking through the oil level window, some bubbling seen in oil even after an hour of pumpdown - some "air" noises from pump)
I started by removing the 3 grocery bags that were holding the 2 thick bags that had at one time held the berries. Struck by how much it looked like a placenta - bag and all!
12 Posted September 16, 2015 You've given me an idea. I have the parts at the shop to use an actual filter head and a spin on filter. I could have a bracket laser cut and powder-coated that would hold the filter/head assembly horizontal which would allow it to completely drain and the outside of the filter would stay clean.