What happens during the defrosting process of an evaporator?

During the defrosting process of an evaporator, the primary objective is to remove any accumulated ice that has formed on the evaporator coils. Over time, particularly in refrigeration systems that operate in cold conditions, moisture from the air can freeze on the coils. This ice can significantly impede the efficiency of the evaporator, as it acts as an additional layer of insulation and can block airflow.

Defrosting typically involves applying heat to the coils to raise their temperature above the freezing point. As the coils warm up, the ice melts and turns into water, which then drains away. This process is crucial for maintaining the efficiency of refrigeration systems and ensuring optimal performance.

The focus of the defrosting process is thus fundamentally about removing ice, making the correct answer the process's impact on the evaporator coils.