AN AUTO SHUT OFF DEVICE FOR A WATER FILTER

摘要

An auto-shut off system for a water treatment device is disclosed. The auto-shut off system comprising a casing defining a top edge and a bottom edge; the casing including an inlet configured to receive a water inflow proximate the top edge and an outlet for the water outflow proximate the bottom edge, the casing defining a hollow passage for the uni-directional flow of water under gravity from the inlet to the outlet; a base configured to be received and retained within the casing, the base including a bottom surface and one or more sidewalls extending upward therefrom to define a hollow cavity and forming a rim disposed in contact with the casing, the base further defining an opening at or proximate the bottom surface, the opening in fluid communication with the outlet; at least one water soluble tablet positioned within the hollow cavity and configured to extend above the rim; the water soluble tablet sized smaller than the hollow cavity to define a clearance passage between itself and the base; the clearance in fluid communication with the opening on the base; the water soluble tablet configured to dissolve after contact with a pre-determined quantity of water; and a plunger supported over the water soluble tablet and sized smaller than the casing to define a side channel such that water from the inlet flows via the side-channel to pass through the opening and out of the outlet; the plunger further configured to descend downwards and engage the base on dissolution of the water soluble tablet and close the fluid communication between the inlet and the outlet. A water treatment device having such an auto shut off system is also disclosed.