US Patent 11203516 Enhanced tankless evaporator

Tankless evaporators, refrigeration circuits, and water coolers use a drum as a thermal mass without using one or more tanks for storing water. Water coolers can include a tankless evaporator. Also described are refrigeration circuits suitable for a water cooler and which include a tankless evaporator. An evaporator for use in a fluid chiller includes a drum of heat conductive material defining a thermal mass, a water coil disposed adjacent around the drum, an evaporator coil configured around the drum and adjacent to the water coil, in which the evaporator coil is operative to cool the water coil.