Cleaning Device

A cleaning device comprising:

• a liquid injection head;
• and
• a head cleaner disposed below the liquid injection head, wherein
• the liquid injection head includes
• a piezoelectric element,
• a diaphragm that vibrates by driving of the piezoelectric element,
• a pressure chamber that applies pressure to a liquid stored therein by vibration of the diaphragm, and
• a nozzle plate having at least one nozzle row in which nozzles communicating with the pressure chamber and injecting the liquid are arranged along a first direction,
• the nozzle plate has an injection surface in which nozzle openings of the nozzles are formed on a lower surface of the nozzle plate,
• the head cleaner includes
• a cap that is disposed to face the injection surface and covers the injection surface, and
• an ultrasonic device that is provided in the cap and transmits an ultrasonic wave to a liquid filled in the cap,
• the ultrasonic device includes
• a first element group in which a plurality of first ultrasonic elements having a first frequency as a resonance frequency and transmitting a first ultrasonic wave having the first frequency are arranged, and
• a second element group in which a plurality of second ultrasonic elements having a second frequency lower than the first frequency as a resonance frequency and transmitting a second ultrasonic wave having the second frequency are arranged, and
• the first element group and the second element group are alternately arranged along a second direction parallel to the injection surface.