G
George Herold
- Jan 1, 1970
- 0
In refrigerators the cold plate is located in vacuum. If the relay
is not hermetically sealed, I'd expect its interior to get pretty much
evacuated while the main vacuum can is pumped. If it doesn't, the
interior probably cools via the metallic parts, so that the residual
gas condenses on the metal surfaces where the surface tension makes
the liquid to spread rather uniformly before it freezes. The frost
layer cannot be thick, the solid volume is maybe 700 times less than
the gas volume. Still, you made a good point.
I find it amazing that the latching mechanism still works there,
it's based on what, a permanent magnet?
Regards,
Mikko
Well permanent magnets like the cold... it's heat that kills 'em.
Any reason they shouldn't work in a nice dry exchange gas.. N2 or
He?
It'd be cool to put a switch down the bottom of a probe.
(Do you use through hole? Thermal expansion and all.)
George H.