Humidifier and humidifying air purifier having the same

A humidifying air purifier comprising:

• a cabinet accommodating a humidifier therein;
• and
• an air purifier accommodated inside the cabinet and disposed at a lower side of the humidifier,
• wherein the humidifier comprises:
• a water tank accommodating water therein, and
• a cover detachably coupled to an upper portion of the water tank,
• wherein the cover comprises:
• a button,
• an upper cover rotatably provided on the upper portion of the water tank and including a cover opening for supplying water into the water tank, and
• a lower cover provided at a lower side of the upper cover and including a supply passage configured to supply the water, which is supplied through the cover opening, into the water tank,
• wherein, after the button is pressed, when the upper cover is rotated in a first direction, water is supplied into the water tank through the cover opening while the cover is coupled to the water tank, and
• wherein, after the button is pressed, when the upper cover is rotated in a second direction opposite to the first direction, the cover is separated from the water tank.