The invention discloses a respiratory action self-cleaning device of a mainframe of a
desk computer. The respiratory action self-cleaning device comprises a first alternative-current
servo motor, wherein a first
respiration opening is arranged at heat
radiation holes in the back side of the mainframe of the
desk computer; a second
respiration opening is arranged at a heat
radiation hole in the side surface of the mainframe of the
desk computer; the first alternative-current
servo motor drives an
air compressor to generate
compressed air; a second alternative-current
servo motor is adopted to drive a
vacuum pump through a
coupling to implement a vacuum sucking function; the generated
compressed air enters the mainframe of the desk computer through a pulse valve to generate
pulse flow and turbulent flow; under the action of a
reversing valve, the first
respiration opening is in a dust blowing state or a dust sucking state, and the second respiration opening is in a dust sucking state or a dust blowing state, so that the respiration function is achieved; a central controller is used for receiving and
processing signals of a photosensitive sensor. Through the adoption of the respiratory action self-cleaning device, a cleaning effect is ensured as functions of turbulent flow and the
pulse flow are utilized with the combination of the internal structural characteristics of the desk computer.