Much more information is needed for a complete answer. A "Furman" line conditioner with the capacity to handle a motor load will cost well in excess of a new refrigerator that will not have this issue. If the motor-start capacitor is failing, same issue as these are often sealed units. Applicable only to North America, of course.

So, where/what/age/brand/what is tripping, and how?

Otherwise, look up "true RMS line conditioner".

Peter Wieck
Melrose Park, PA