In gas defrost, what is the role of the re-freeze phase?

The re-freeze phase in gas defrost plays a crucial role in restoring the cooling function of the refrigeration system after the defrost cycle has been completed. During the defrost cycle, the evaporator may become warm to clear any accumulated frost or ice. Once this frost is removed, the system enters the re-freeze phase, where it needs to return to its normal operating temperature to ensure optimal cooling performance. This phase allows the refrigerant to flow through the evaporator, facilitating the cooling process and bringing the system back to its intended operational state before the next cooling cycle begins.

Other aspects of the defrost cycle, such as removing frost or preparing for subsequent cycles, are important, but they do not directly address the immediate need to restore the cooling function after defrosting. Therefore, the emphasis on returning to cooling is what makes this answer the most relevant and accurate in the context of gas defrost operations.