projects:vacuum_drier:work_logs:1_assembly
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projects:vacuum_drier:work_logs:1_assembly [2022/10/14 11:22] – tjhowse | projects:vacuum_drier:work_logs:1_assembly [2022/10/14 11:26] (current) – tjhowse | ||
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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 vacuum of about about 50 mbar. The cold trap is a glass jar with a metal lid in an insulated box. The jar lid has two pipe fittings. The jar is submerged in a mixture of methylated spirits and dry ice at about -75°C. The water ice in the food sublimates directly to a gas without disturbing the macro-scale structure of the food. I.E. The ice cream doesn' | + | The vacuum pump pulls a vacuum of about about 50 mbar. The cold trap is a glass jar with a metal lid in an insulated box filled with dry ice and methylated spirits at about -75°C. The jar lid has two pipe fittings. The water ice in the food sublimates directly to a gas without disturbing the macro-scale structure of the food. I.E. The ice cream doesn' |
{{: | {{: | ||
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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.1665746552.txt.gz · Last modified: 2022/10/14 11:22 by tjhowse