Drinking water dispenser with built-in UV sterilization system

A drinking water dispenser with built-in UV sterilization system, comprising:

• a housing (10);
• a device (11) for connecting to a water source (12);
• a tap (13) for dispensing cooled water to consumers;
• a cold water tank (14) arranged in the housing (10),
• wherein the cold water tank (14) is equipped with a cooling device (15),
• wherein the cold water tank (14) has a lower part (16) to be filled with the cooled water and an upper part (17) where an air cavity is formed when the cold water tank (14) is filled with the cooled water,
• wherein the cold water tank (14) has an inlet (18) for uncooled water coming from the water source (12) connected to the device (11) for connecting to the water source (12),
• wherein at least one UV radiation source (30) is installed inside the cold water tank (14),
• wherein the cold water tank (14) has a cooled water outlet (19) connected to the tap (13), and
• wherein the cold water tank (14) is equipped with an outlet for the uncooled water (23) and a sterilized water inlet (24);
• a flow sterilizer (20) having an inlet (21) and an outlet (22),
• wherein the inlet (21) of the flow sterilizer (20) is connected to the outlet for the uncooled water (23), and the outlet (22) of the flow sterilizer (20) is connected to the sterilized water inlet (24);
• and
• a funnel (25) having a wide upper part (26) and a narrow lower part (27) installed inside the cold water tank (14),
• wherein the funnel (25) is installed under the inlet (18) for the uncooled water coming from the water source (12), so that an upper edge (28) of the funnel (25) is above a water level (29) in the cold water tank (14), to isolate the cooled water in the lower part (16) of the cold water tank (14) from the uncooled water coming from the water source (12), and
• wherein the narrow lower part (27) of the funnel (25) is connected to the outlet for the uncooled water (23).