A drinking water dispenser includes a body, including: an inlet pipe for connecting the external water source, a cold water tank having a lower part filled with water and an upper part in which an air cavity is formed, when the tank is filled with water, a water inlet connected to the inlet pipe, and water outlet connected to an outlet pipe, an outlet valve for dispensing water to consumers, connected to the outlet pipe, and a UV radiation source installed in the cold water tank. The water inlet is made in a form of a vertical pipe, placed in the cold water tank, and having an open upper end and a lower end connected to the inlet pipe; and the UV radiation source is installed in the upper part of the cold water tank above the open upper end of the vertical pipe of the water inlet.

A refrigerator may be provided with a dispenser which includes a nozzle pipe; a light source that radiates ultraviolet light from one end of the nozzle pipe to an inner space of the nozzle pipe, a window that is provided between the one end of the nozzle pipe and the light source, and a liquid supplying hose barb connected to the nozzle pipe via an elbow. Liquid exiting the elbow swirls as ultraviolet light is irradiated onto the liquid.