Method for controlling a steam generating system for a domestic steam cooking oven and steam generating system

A steam generating system for a domestic steam cooking oven, wherein said steam generating system comprises:

• a steam generator,
• an inlet valve for activating and deactivating a water supply for the steam generator,
• a regulating thermal switch for controlling the steam generator and inlet valve, and
• a limiting thermal switch for controlling the steam generator and inlet valve, wherein
• the regulating thermal switch and the limiting thermal switch respond to a temperature within and/or at the steam generator,
• a threshold value of the limiting thermal switch being higher than a threshold value of the regulating thermal switch,
• the regulating thermal switch being adapted to deactivate the steam generator and to activate the inlet valve if the temperature within and/or at the steam generator exceeds the threshold value of said regulating thermal switch, and
• wherein the threshold value of the regulating thermal switch is between 160° C. and 210° C.

A steam generating system for a domestic steam cooking oven, comprising a cooking cavity, a water tank for holding water, a steam generator, a regulating thermal switch and a limiting thermal switch;

• said water tank being connected via a normally-closed water-supply valve to said steam generator in order to supply water thereto for generating steam;
• said steam generator being further connected via a steam nozzle to said cooking cavity in order to supply to said cavity steam generated in said steam generator;
• said regulating thermal switch and said limiting thermal switch each being an electromechanical switch devoid of electronic control circuits and disposed in intimate thermal communication with said steam generator in order to be influenced by temperature fluctuations of said steam generator;
• said limiting thermal switch being wired in a power circuit for supplying power to both said steam generator and said water-supply valve;
• said regulating thermal switch being wired in series with said limiting thermal switch and being adapted to alternately select between powering, via said power circuit, either said steam generator or said water-supply valve depending on a temperature of said regulating thermal switch being above or below a temperature-regulate threshold;
• said limiting thermal switch being adapted to open said power circuit at a temperature-limit threshold;
• said regulating thermal switch being adapted to connect said steam generator to said power circuit below said temperature-regulate threshold and to connect said water-supply valve to said power circuit above said temperature-regulate threshold, wherein both said steam generator and said water-supply valve cannot be simultaneously connected to said power circuit;
• said temperature-limit threshold being 40° C. to 80° C. higher than said temperature-regulate threshold.