Punching Unit of Plastic Bag for Water Dispenser Improved Airtightness

摘要

Provided is a plastic bag punch unit used in a hot and cold water dispenser using a plastic bag, and including a drain tube and a punching unit. The drain tube has a drain channel therein and at least one inlet formed on an upper wall, and water introduced through the inlet is transferred to the hot and cold water dispenser through the drain channel of the drain tube. The punching unit is fixed to an upper portion of the drain tube, and punches the plastic bag so that water stored in the plastic bag is discharged out of the plastic bag. The punching unit and the drain tube are fixed by engaging a catching groove formed at a lower end of the punching unit and a catching protrusion formed on an inner wall of the drain tube. The plastic bag punching unit of the present invention is advantageous in that leakage of water does not occur during the process of punching the plastic bag since the punching unit and the drain tube are smoothly coupled. In addition, the punching unit and the drain tube of the plastic bag punching unit of the present invention are not separated during the process of punching the plastic bag because the punching unit and the drain tube are firmly coupled.