Copper coil is a common heat exchange device widely used in industry and HVAC systems. Copper coil is made of copper tube, which has good thermal conductivity and corrosion resistance, and is suitable for most environments. Copper coil is widely used in many fields, including chemical industry, food processing, air conditioning system, refrigeration equipment and energy recovery system. In the air conditioning system, fan coil as the terminal equipment plays a vital role in regulating the indoor temperature.