Refrigeration and Air Conditioning
In a flooded evaporator refrigerator, an accumulator at suction of compressor is used to

Superheat the vapour
Collect vapours
Collect liquid refrigerant and prevent it from going to compressor
Detect liquid in vapour

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Refrigeration and Air Conditioning
For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then

Smaller cabinet should be used
Refrigerant with lower evaporation temperature should be used
Perfectly tight vapour seal should be used
Bigger cabinet should be used

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