Electrostatic charging device and assembly method thereof

An electrostatic charging device, comprising:

• a frame body, comprising at least one edge frame;
• a plurality of rods, provided at interval inside the frame body;
• at least one first accommodating groove, provided at each side of each rod and opened to face the at least one edge frame;
• an electrode body arranged inside the at least one first accommodating groove and arranged along a length direction of the at least one first accommodating groove, and
• a plurality of electrode heads penetrating through a wall of the at least one first accommodating groove and connected with the electrode body and provided facing the at least one edge frame;
• wherein the plurality of electrode heads are arranged along the electrode body at intervals, such that a discharging area covers a whole of an interior of the frame body, wherein each electrode head is a wire electrode, or brush electrode, an angle between an arrangement direction of each electrode head and a plane in which the frame body is located is greater than or equal to 0 degrees and less than or equal to 60 degrees;
• the electrode body is sealed in the at least one first accommodating groove.