Coil dry意思

"Coil dry" is a term used in the context of heating and air conditioning systems, specifically referring to the process of drying out the refrigerant after it has passed through the evaporator coil. In an air conditioning system, the refrigerant absorbs heat from the indoor air as it evaporates inside the evaporator coil, which is located inside the air handler or furnace.

When the refrigerant leaves the evaporator coil, it is in a gaseous state and is relatively cool. Before it enters the compressor, which would raise its temperature and pressure, the refrigerant needs to be dried to prevent the formation of moisture or water vapor within the system. This moisture can lead to corrosion, reduced efficiency, and other issues.

To dry the refrigerant, an air conditioning system may use a desiccant, which is a material that absorbs moisture. The most common desiccant used is called molecular sieve, which is a type of zeolite. The refrigerant passes through a container filled with the desiccant, which absorbs the moisture from the refrigerant.

The coil dry process is an important step in maintaining the efficiency and longevity of an air conditioning system. It helps to ensure that the refrigerant remains dry and free from moisture, which can cause damage to the system over time.