It should not open the refrigerator frequently, because each time you open the fridge will keep the heat from outside into the refrigerator, it must be very hard work.
Do not open the refrigerator frequently. Because each time you open the refrigerator. To keep the heat from the outside into the fridge. Machine must work harder.
Experience should not open the fridge, often because each time open the fridge. To make the heat from the outside into the refrigerator. The machine had to work harder.