What is the function of the defrost cycle in a refrigeration system?

The defrost cycle in a refrigeration system primarily serves to remove ice buildup from evaporator coils. During normal operation, moisture from the air can freeze on the coils, particularly in humid conditions. This ice can insulate the coils, reducing their efficiency and the overall performance of the refrigeration system.

When the defrost cycle is initiated, the system typically reverses the flow of refrigerant or uses a heating element to warm the evaporator coils, causing the ice to melt. This process ensures that the coils can continue to effectively absorb heat from the surroundings, maintaining optimal operation and energy efficiency. By managing ice buildup, the defrost cycle plays a crucial role in keeping the refrigeration unit functioning properly and preventing potential damage that could arise from excessive ice accumulation.