The suction accumulator prevents liquid refrigerant from entering the:

The suction accumulator plays a crucial role in refrigeration systems by ensuring that only vapor refrigerant reaches the compressor. Its primary function is to collect any liquid refrigerant that might inadvertently migrate from the evaporator during normal operation. This migration can occur especially in low-load conditions or when the system experiences fluctuations in pressure.

Liquid refrigerant entering the compressor can cause serious damage, potentially leading to mechanical failure. Compressors are designed to compress vapor; liquid refrigerant can result in hydraulic effects, leading to what is known as liquid slugging. By capturing excess liquid refrigerant, the suction accumulator allows the vapor to be drawn into the compressor safely, thereby maintaining the efficiency and longevity of the refrigeration system.

In contrast, components like the evaporator, condenser, and heat exchanger operate differently and do not face the same risks from liquid refrigerant as the compressor does. The evaporator uses refrigerant to absorb heat and produce vapor; the condenser allows the vapor to release heat and condense into liquid; and the heat exchanger provides a mechanism for transferring heat. Therefore, they do not require the protective function that the suction accumulator serves with respect to the compressor.