Electrode heating unit and device, and control method for protecting electrical short therefor

An electrode heating device comprising:

• a device housing;
• an electrode heating unit including a central conductor, an internal conductor disposed to form a gap inside the central conductor, and an external conductor disposed to form the gap outside the central conductor, and received and installed in the device housing;
• and
• a control board received and installed inside the device housing, and applying power to an electrode of the electrode heating unit, and controlling a heat generation operation of the electrode heating unit,
• wherein the device housing includes
• a receiving space for receiving the electrode heating unit inside the center of a housing bottom surface,
• a cover plate installed to cover the receiving space of the housing bottom surface and having multiple water inflow holes on a plate surface, and
• a plurality of communication paths provided in a valley form around the cover plate, and communicating with the receiving space.