Patent ID: 8875944

Claim:
A beverage dispenser comprising: a raw water container for holding drinking water therein, the raw water container having an outlet port; a container connecting portion to which the outlet port of the raw water container can be connected with the outlet port facing downward; a tank provided under the container connecting portion for holding drinking water dropped from the raw water container; an outlet valve through which drinking water in the tank can be dispensed; a water passage tube provided at the container connecting portion and inserted upwardly into the outlet port of the raw water container, the water passage tube being formed with a water passage hole through which drinking water in the raw water container passes, the water passage tube having a first opening at a bottom end portion thereof, wherein an interior of the water passage tube has a cross-section which is partitioned into a water passage through which the water passage hole communicates with the first opening, and an air passage communicating with a small air passage hole which opens to the water passage, the air passage having a second opening at a lower end portion of the air passage; a water passage pipe which is connected to the first opening and through which drinking water drops into the tank; a first on-off valve provided at a free end of the water passage pipe and configured to open when the water level in the tank lowers; an air passage pipe connected to the second opening and hanging into the tank; and a second on-off valve provided at a free end of the air passage pipe and configured to open when the water level in the tank lowers, wherein the raw water container has a side wall which is sufficiently flexible such that as drinking water in the raw water container drops, the raw water container is gradually collapsed under atmospheric pressure.