Water fill drawer with structures to prevent backflow of steam

A water fill assembly for an oven having a cooking chamber, a cabinet at least partially surrounding the cooking chamber, a water reservoir having a reservoir inlet and a reservoir outlet, the oven being configured to extract water from the water reservoir via the reservoir outlet to supply steam to the cooking chamber, and a conduit defining a portion of a fluid flow path into the reservoir inlet, the water fill assembly comprising:

• a holder;
• a drawer body defining a water-receiving cavity, an opening to the water-receiving cavity, and a fill outlet from the water-receiving cavity, the drawer body defining a fluid flow path in from the opening and out through the fill outlet and being slideable with respect to the holder between an opened position, wherein the opening to the cavity is exposed to an environment surrounding the oven, and a closed position, wherein the drawer body is retracted into the holder;
• a cylinder connected between the fill outlet and the conduit, having a first end, and fixed with respect to the holder;
• and
• a piston fixed with respect to the drawer body and movable within the cylinder away from the first end when the drawer body is in the opened position and into engagement with the first end of the cylinder when the drawer body is in the closed position to close the fluid flow path between the opening of the drawer body and the conduit.

An oven, comprising:

• a cooking chamber;
• a cabinet at least partially surrounding the cooking chamber;
• a water reservoir having a reservoir inlet and a reservoir outlet, the oven being configured to extract water from the water reservoir via the reservoir outlet to supply steam to the cooking chamber;
• a conduit defining a portion of a fluid flow path into the reservoir inlet;
• a water fill assembly having a holder and a drawer body defining a water-receiving cavity, an opening to the water-receiving cavity, and a fill outlet from the water-receiving cavity, the drawer body being slideable with respect to the holder between an opened position and a closed position;
• a cylinder connected between the fill outlet and the conduit, the cylinder having a first end and being fixed with respect to the holder;
• and
• a piston fixed with respect to the drawer body and movable within the cylinder away from the first end when the drawer body is in the opened position and into engagement with the first end of the cylinder when the drawer body is in the closed position to close the fluid flow path between the opening of the drawer body and the conduit.