Ion generator, fan coil unit and air conditioning system

An ion generator for an air circulation system, comprising:

• a power module;
• a negative plate connected to the power module;
• a ground plate spaced apart from a first side of the negative plate, wherein the first side of the negative plate comprises a plurality of plasma needles extending toward the ground plate;
• and
• a positive plate spaced apart from a second side of the negative plate, wherein the positive plate is connected to the power module and has a polarity opposite to that of the negative plate,
• and wherein a first side of the positive plate faces the second side of the negative plate,
• wherein each of the first side of the positive plate and the second side of the negative plate is provided with a plurality of carbon fiber brushes;
• wherein the power module applies a positive voltage to the positive plate and applies a negative voltage to the negative plate.