Lighting apparatus with heat radiation function by non-powered blowing structure

A lighting apparatus having a heat dissipation function due to a non-powered ventilation structure, the lighting apparatus comprising:

• a housing comprising an anion-generating module for generating anions;
• a cylindrical anion-emitting tube formed to protrude from a first surface of the housing;
• a discharge electrode formed to protrude the first surface of the housing corresponding to a center of the cylindrical anion-emitting tube;
• an induction electrode disposed on an inner surface of the cylindrical anion-emitting tube;
• an LED circuit board disposed on or above the housing corresponding to an outside of the cylindrical anion-emitting tube and provided with at least one LED chip;
• and
• a lighting cover configured to cover the LED circuit board, but not to cover the cylindrical anion-emitting tube,
• wherein a first end of the cylindrical anion-emitting tube is closed by a first surface of the housing, but a second end of the cylindrical anion-emitting tube opposite to the first end is open, and anions emitted from the discharge electrode are emitted outward through the second end of the cylindrical anion-emitting tube,
• an air through hole is formed on a lower side surface of the cylindrical anion-emitting tube, and the air through hole communicates with an outside through the lighting cover or by the lighting cover, so that when anions are emitted from the discharge electrode, air outside the lighting cover enters an inside of the cylindrical anion-emitting tube through the air through hole, and then is discharged and circulated outward through the second end of the cylindrical anion-emitting tube,
• a space in which the LED circuit board is disposed is in air communication with the air through hole so that, when air flow is formed through the air through hole by anions emitted from the discharge electrode, air flow occurs also in a space in which the LED circuit board is disposed and heat generated from the LED chip of the LED circuit board is dissipated by the air flow,
• a through hole having a diameter larger than an outer diameter of the cylindrical anion-emitting tube is formed on a central portion of the lighting cover so that an air passage is formed between a through hole wall forming the through hole of the lighting cover and the cylindrical anion-emitting tube and, accordingly, air outside the lighting cover enters an inside of the cylindrical anion-emitting tube through the air passage and the air through hole.