Magnetic ring assembly, water tank assembly, and humidifier

A magnetic ring assembly, configured to be disposed at a bottom of a water tank, wherein the bottom of the water tank is provided with a protruding structure;

• and the magnetic ring assembly comprises:
• a magnetic ring connecting seat, configured to be vertically movably connected to the bottom of the water tank;
• a magnetic ring fixing seat, fixedly connected to the magnetic ring connecting seat, wherein a bottom of the magnetic ring fixing seat is provided with a first through hole;
• and a magnetic ring, vertically movably disposed in the magnetic ring fixing seat, wherein a second through hole is formed in the magnetic ring;
• wherein the magnetic ring assembly has a first position away from the bottom of the water tank and a second position adjacent to the bottom of the water tank;
• when the magnetic ring assembly is forced to move to the first position, a detection assembly in a base passes through the first through hole and the second through hole in sequence to detect a position of the magnetic ring;
• and when the magnetic ring assembly is forced to move to the second position, a lower end of the magnetic ring fixing seat is flush with a lower end of the protruding structure.