Vacuum dryer:
It dries food at low temperature in any weather in 3 hours or less.
I'd like to credit a free research paper that was very helpful for starting this project:
[ Ссылка ]
Beef meat dehydration test runs on the vacuum microwave:
[ Ссылка ]
Ordering: [ Ссылка ]
Comments are welcome.
Below is video transcript for referencing:
This tool dries 1kg of food in less than 3 hours
at a temperature as low as 35 C.
(dried bananas shown)
The low temperature and quick drying
preserve vitamins and taste
The machine works by boiling off the water in food
in the microwave oven under vacuum.
(dried tomatoes shown)
Vacuum allows the machine to boil water
at temperatures as low as 35 C.
No nitrite salts added to this dried pork meat,
this red color is straight out of the oven.
(pineapple)
Dried fruits make healthy snacks,
here is dried mangoo puree.
Let's use it !
Food is cut into slices of about 2cm thickness
Some fruits , like oranges and apples,
have to be juiced or pureed first
Food is weighted
Same for meat
Food is put in the microwave oven
power is set
The duration is set
The scale for water output is tared
The maximum water weight we want to draw out it set
I use 45% of initial weight for pork
and 80% for pinapple
The vacuum pump starts
then stops automatically
when desired vacuum is reached
The oven starts after vacuuming
When the microwave timer runs out
or the weight of water to evaporate is reached
the machine stops
Monitoring is made through several indicators.
(the screen has much more contrast in reality)
Water collected
Water level in the collection vessel
Collected water level across time.
The red parts show vacuum pump activity.
Pressure
Temperature of incoming steam.
How it works
The lid and bowl are sealed with a silicone gasket,
and held together by the vacuum.
A tube goes from the bowl,
through the oven wall, to the condenser.
(yes this is safe)
The condenser is a stainless steel tube
with a copper coil inside.
Pressure sensor
Temperature sensor
The condenser and the bowl are initially vacuumed
using a vacuum pump, then vacuum is maintained
by condensing water vapours back to water
vacuum pump
The sensors are connected to
the electronics in the box
Water is pumped from the bucket....
... to the copper coil in the condenser ...
...and then to the fan cooled radiator
before returning to the bucket
Condensed water runs down into a collection vessel...
...resting on a scale measuring the water collected
