Why do refrigerator doors suddenly need hulk strength to open at random times?
In: Physics
Refrigeration mechanic here saying that no fridge has a vacuum pump in it. What is actually happening here is the air inside the fridge is colder that the ambient air outside the fridge. The pressure temperature law explains how the hot external air is higher pressure than the cold internal air. This pressure difference means there is a negative pressure inside the fridge which holds the door shut. The reason it is random is it depends on how many times you open the fridge and also depends on ambient temperature. A larger difference in external and internal temperature will mean a stronger pressure difference.
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