Ice maker appliance and overflow structure

An ice maker appliance, the ice maker appliance comprising:

• an ice engine comprising a water supply opening;
• a flow control device;
• a lower reservoir comprising a supply outlet opening and a return opening;
• an upper reservoir comprising a supply inlet opening, an ice engine supply opening, and a drain opening, the upper reservoir comprises a passage at which a water filter is disposable in fluid arrangement between a receiving plenum of the upper reservoir and the drain opening, the upper reservoir comprising a flow separation wall extending from the drain opening and into the receiving plenum, wherein the flow separation wall forms a bypass passage extending from a bypass inlet opening to the drain opening, wherein the bypass passage fluidly bypasses the water filter from the receiving plenum to the drain opening;
• a drain conduit fluidly coupling the upper reservoir to the lower reservoir, wherein the drain conduit fluidly couples from the drain opening to the return opening;
• a water supply conduit fluidly coupling the upper reservoir to the ice engine, wherein the water supply conduit fluidly couples from the ice engine supply opening to the water supply opening, wherein the water filter is positioned fluidly upstream of the water supply conduit and the ice engine;
• and
• an upper reservoir supply conduit fluidly coupling the lower reservoir to the upper reservoir, wherein the upper reservoir supply conduit fluidly couples from supply outlet opening to the supply inlet opening, wherein the flow control device is configured to selectively feed water through the upper reservoir supply conduit from the lower reservoir to the upper reservoir.