Abstract: A humidifier assembly for bakery proof boxes for inservice removal of water and water-borne impurities has a water receptacle with a nonstick coating which includes an interior bottom with a raised section and a contiguous lowered sump. Surrounding sidewalls contain water which is heated. Water from a water supply passes through a solenoid valve and into a nozzle injecting water against the raised floor. The water contacts a near sidewall, creating turbulence and a scrubbing action and spreads over the entire raised floor.Heating elements are provided to heat the raised bottom section of the receptacle without heating the sump and water in the sump. Such elements are cast in the bottom section of the receptacle.Water and impurities are removed from the sump through an outlet conduit which is connected to a venturi. The venturi is connected to a drain line and to the water supply through a flush solenoid valve. A siphon breaker is provided.

Abstract: A fast warmup, high capacity, no splash, self-cleaning humidifier for a proof box. The device has an aluminum steam generating heater pan including at least one electrical heating element cast into its base. A reservoir and a float controlled valve attached to the heater pan by a dog leg conduit keeps the level of water in the heater pan at a depth of about one-half inch. The heater pan is mounted for rotation about a horizontal axis, and a drip pan is located beneath the heater pan. For cleaning of accumulated minerals, scale and the like from the heater pan, the heater pan is allowed to heat to over 212.degree. F. while dry. Cooler water from the reservoir is then suddenly added to the hot, dry heater pan resulting in the removal of said accumulated minerals, scale and the like from the heater pan due to thermal shock and the vigorous boiling of the added water. The contents of the heater pan are then dumped into the drip pan by rotating the heater pan about said horizontal axis.