What type of defrost method uses air to remove frost buildup in medium temperature systems?

The off cycle defrost method is employed in medium temperature systems to effectively manage and remove frost buildup. In this technique, the refrigeration system's compressor temporarily shuts off while the system's fans continue to operate, circulating warm air within the evaporator coil. This warm air helps elevate the temperature of the coil, melting the frost that has accumulated.

This method is particularly effective in medium temperature applications because it utilizes the inherent warmth from the surrounding air, rather than relying on external sources like electric heating elements or hot gas. It operates efficiently during certain intervals without additional energy input, making it a cost-effective solution for maintaining optimal performance in refrigeration systems.

In contrast, other defrosting methods, such as hot gas or electric defrosts, utilize different mechanisms involving heat transfer from other sources, which are not as reliant on the system's existing airflow properties. Water defrost may also introduce complications related to water management and potential drainage issues, making off cycle defrost a simpler and effective option for medium temperature systems.