Water spray feature of an appliance for separating particulate material from a filter member

A laundry appliance comprising:

• a tub that defines a laundry treatment space and includes a rear wall;
• an air flow path that extends from the tub and through an air flow port defined within the rear wall of the tub;
• a lint filter disposed within the air flow path that entraps particles of lint;
• and
• a fluid spray system that extends through the rear wall and directs a flow of fluid along an inside surface of the rear wall and across a surface of the lint filter to separate particles of lint from the lint filter and dispose the particles of lint within the laundry treatment space.

An air flow system for an appliance, the air flow system comprising:

• a blower that directs process air through an air flow path;
• a tub that defines a laundry treatment space, wherein the air flow path extends through the laundry treatment space and through a rear wall of the tub at an air flow port;
• a lint filter positioned within the air flow port, wherein the lint filter captures lint particles on a filter surface that partially defines the laundry treatment space;
• and
• a fluid spray system that extends through the rear wall and directs a flow of fluid along an inside surface of the rear wall and across the filter surface, wherein the fluid spray system directs the flow of fluid generally away from a central axis of the tub and toward an outer edge of the rear wall.