초록 ▼

An automatic deliming process for a steam oven cooker is described. The process initiates a deliming procedure after a predetermined time of normal operation, which period of time is determined by the hardness of the water in the local area. Upon the expiration of this period of time a microprocesso

An automatic deliming process for a steam oven cooker is described. The process initiates a deliming procedure after a predetermined time of normal operation, which period of time is determined by the hardness of the water in the local area. Upon the expiration of this period of time a microprocessor signals an operator to shut down normal operation of the oven, and initiate the deliming process. The microprocessor then activates a peristaltic pump which injects a predetermined quantity of deliming liquid from an external reservoir into the generator. After the deliming time has passed and the generator contents have cooled to 140° F. the microprocessor automatically activates a drain pump to drain the deliming solution from the generator. Subsequently the microprocessor activates a fill-solenoid opening and inlet from a reservoir of rinse water into the generator to rinse the same. The microprocessor then again opens the drain to drain the rinse water, and normal operation is resumed.

대표청구항 ▼

1. A process for automatically deliming a steam generator in a cooking oven wherein steam is a cooking medium comprising the steps of:providing an oven with an internal steam generator having first and second inlets and at least one outlet, a source of water communicating with said generator, an ext

1. A process for automatically deliming a steam generator in a cooking oven wherein steam is a cooking medium comprising the steps of:providing an oven with an internal steam generator having first and second inlets and at least one outlet, a source of water communicating with said generator, an external reservoir of deliming liquid, a drain pump coupled to said at least one outlet, a fill-solenoid coupled between said first inlet and said source of water and a peristaltic pump having an inlet coupled to said reservoir and an outlet coupled to said second inlet;providing a microprocessor controller controlling at least said peristaltic pump, fill-solenoid and drain pump;(a) determining a time interval between successive deliming cycles of the generator based upon water hardness;(b) programming said controller to signal when said interval has been reached;(c) initiating a deliming cycle by said microprocessor by automatically heating the water in the generator to a temperature above 180° F. in response to said signal;(d) automatically activating said peristaltic pump to inject a predetermined amount of deliming liquid from said reservoir into said generator;(e) permitting said generator to cool;(f) automatically activating said drain pump to drain the generator after a predetermined period of time and when the temperature of water and deliming liquid has cooled to 140° F.;(g) automatically opening said fill-solenoid to admit rinse water for rinsing into said generator; and(h) automatically activating said drain pump to drain said generator. 2. The process of claim 1 further comprising:returning said oven to normal operation and repeating steps (c) through (h). 3. The process of claim 1 wherein said signal is a flashing light, and the oven manually ceases normal operation prior to initiating the deliming cycle.