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Re: [Phys-l] Freezer Delay




On 2011, Aug 30, , at 12:46, Donald Polvani wrote:


Can anyone explain to me why the freezer compressor seems to have a built in
delay after the power is shut off and then turned quickly back on? Is this
a deliberate attempt to prevent the compressor (or delicate electronics)
from experiencing too many switching transients from a power source which is
turning on and off, or is it in the nature of compressors to not be able to
rapidly start and start? Was I hurting somehow the compressor, or
electronics, by letting the compressor cycle in the above manner?


The compressor should pump (pressurize) gas not liquid.

When the pump stops liquid backs up into the cylinder(s) and would heavily load everything if turned on before the liquid evaporated. Same w/ vane vacuum pumps in our labs.

bc done from memory may be dead wrong, (instead of live correct)

p.s. noticed this behaviour w/ his many refrigerators.