projects:vacuum_drier:work_logs:1_assembly
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projects:vacuum_drier:work_logs:1_assembly [2022/10/14 11:10] – tjhowse | projects:vacuum_drier:work_logs:1_assembly [2022/10/14 11:26] (current) – tjhowse | ||
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===== The Plan ===== | ===== The Plan ===== | ||
- | I would like to make vacuum freeze-dried food at home for fun. | + | I would like to make vacuum freeze-dried food at home for fun. |
Ben at Applied Science made it look easy. | Ben at Applied Science made it look easy. | ||
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* Mangoes, | * Mangoes, | ||
* Kiwi fruit, | * Kiwi fruit, | ||
- | * Rainbow ice cream. | + | * Rainbow ice cream, |
+ | * [[https:// | ||
===== The Assembly ===== | ===== The Assembly ===== | ||
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{{: | {{: | ||
- | The vacuum pump pulls a low vacuum, about 50 mbar. The cold trap is filled with methylated spirits | + | The vacuum pump pulls a vacuum |
+ | |||
+ | {{: | ||
Ideally the food should be at or below -35°C when it goes into the vacuum chamber. My freezer only goes to -20°C, so I have boxed and bagged portions of the food separately so I can superchill them in the cold trap before putting them into the food chamber. I have a temperature-controlled hotplate on standby to put some heat into the system to kick off the sublimation. I will pre-chill the food chamber too, so the ice cream doesn' | Ideally the food should be at or below -35°C when it goes into the vacuum chamber. My freezer only goes to -20°C, so I have boxed and bagged portions of the food separately so I can superchill them in the cold trap before putting them into the food chamber. I have a temperature-controlled hotplate on standby to put some heat into the system to kick off the sublimation. I will pre-chill the food chamber too, so the ice cream doesn' | ||
- | The pump gets hot during operation, | + | The pump gets hot during operation, |
===== Video ===== | ===== Video ===== |
projects/vacuum_drier/work_logs/1_assembly.1665745837.txt.gz · Last modified: 2022/10/14 11:10 by tjhowse