What is the role of the indoor coil during the cooling cycle?

During the cooling cycle of a heat pump, the indoor coil functions as the evaporator. In this role, the indoor coil absorbs heat from the indoor air, allowing the refrigerant within the coil to evaporate as it transitions from a liquid to a gas. This process effectively cools the indoor space, as the heat is removed from the air and absorbed by the refrigerant.

As the refrigerant passes through the evaporator, it picks up heat from the indoor environment, lowering the temperature of the air circulating around the coil. This cooled air is then distributed back into the living area, leading to a comfortable indoor climate.

In the context of the cooling cycle, the role of the evaporator is crucial as it directly influences the efficiency of the cooling process and the overall comfort level within the space. Understanding this mechanism is vital for anyone working with heat pumps, as it clarifies how indoor and outdoor components interact during operation.