Portable Water Purifier Backwashing Mechanism

The patent implements backwashing by reversing the water flow direction through the filter core. The piston apparatus reverses movement to push water from the purified water chamber back through the filter core in reverse direction, cleaning contaminants from the filter pores. This inversion of flow direction enables the filter core to be cleaned and reused multiple times, significantly extending its service life without requiring complex external cleaning equipment.

The patent enables recovery and reuse of the filter core through the backwashing function. Instead of discarding the filter core after it becomes blocked, the system recovers it by reversing water flow to remove contaminants from the filter pores. The purified water chamber stores clean water that can be used for backwashing, creating a closed-loop system that recovers the filter core's functionality multiple times before replacement is needed, reducing resource waste.

The patent implements a self-service backwashing system where the user simply operates the piston apparatus to reverse water flow through the filter core. The system automatically uses stored purified water from the purified water chamber to perform the backwashing operation. This self-service mechanism eliminates the need for external cleaning equipment or complex procedures, allowing users to easily maintain filter core performance by simply pumping the handle to reverse flow and clean the filter.

The patent integrates multiple functions into a compact portable design. The piston apparatus serves dual purposes: normal water pumping through the filter and backwashing by reversing flow direction. The purified water chamber serves both as storage for purified water and as the water source for backwashing operations. This multi-functionality enables the compact device to provide both filtration and self-cleaning capabilities without requiring separate systems, maintaining versatility while minimizing volume for portability.