the information of frost on cooling coil in a refrigerator
Answers
Answer:
“Frost’ is an insulation material.
So, even though it is temporary, it still is an impediment to the cooling effect of air passing by a cold surface.
Refrigeration is the removal of heat by a cooling material.
The cooling coils are just a means to achieve the cooling effect.
The addition of the frost then reduces the amount of cooling available over time, so that the machinery runs longer with the frost on it, than without. This additional run time increases the power consumption overall, and not the instantaneous power consumed while running.
Start Current is 12A, Running current is 7A. The start time might be five seconds, and the run time 10 minutes, then an idle time of 1 hour. Repeat.
This maintains a -5C setpoint in a freezer cavity.
The frost would increase the on time from 10.5 minutes to 12 minutes.
The de-frost heater then runs once every 24 hours, and melts the ice that forms.
Simple system but it works
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