Sparkingchip:
You are way behind the pack investigating the energy usage of your fridge and freezer.
For many years Savaplug made a control unit for fridges and freezer, but I think you roll only get some through EBay now as they have been discontinued, though a Commercial version is available.
Andy Betteridge
mapj1:
- How do they work?
In the non-snake oil versions (beware of Ebay selling you an empty box,), the power is removed for a short fraction of the time and the generator-like EMF from the motor is sampled , along with the current and voltage on the windings, to deduce the rotational state of the motor, . . .
Sparkingchip:
If you root about on the internet and YouTube you will find that American fridge freezer manufacturers actually sell heating elements as an optional extra that connects to the fridge thermostat allowing the temperature to be raised inside the fridge to make the compressor kick in to cool it down. . .
I don't recall these devices ever being explained, appraised or reviewed in a technical journal,
Ah well, I did meet the man for lunch in 1988, when he was starting out, and he explained the outline of the ideas then - at the time he was after assistance with the implementation and EMC aspects.
It was a good lunch, and although I never went on to work with him in the end, I did keep the beermat doodles, and have since kept a distant eye on the projects progress, as I think the concept is actually a very good one for simple cases when using a VFD is overkill. Being an English idea, it has suffered from lack of exposure.
when my cat died, .. I stuck him in the bottom draw of the freezer ...
.. rock hard when I retrieved him.....
It is a funny thing the stranger life experiences one has in common. We came back to a similar thing as one died while we were away. Had to dig a very odd shaped hole..
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