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1.发明申请公开(公告)号：US20210190316A1
公开(公告)日：2021-06-24
申请号：US17128443
申请日：2020-12-21
申请人： SIT S.p.A.
摘要： A control system of a water heater apparatus with a combustible gas burner is presented where the apparatus includes a pilot burner with an intermittent-type pilot flame, a main burner, a pilot valve and a main valve, a control unit, a flame detection electrode, introduced into the flame of the pilot burner, and which is configured to conduct an ionization current. The control unit is configured to measure/detect a variation involving increase/decrease of the intensity of ionization current detected, the variation in intensity of ionization current being generated during the change between a first condition, in which the ionization current identifies the ignition state of only the pilot burner, and a second condition, in which the ionization current identifies the simultaneous ignition state of the pilot burner and the main burner so that, by detection of the measurement/variation of ionization current, the effective ignition of the main burner is recognized.
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2.发明申请公开(公告)号：US20220026065A1
公开(公告)日：2022-01-27
申请号：US17296681
申请日：2019-11-25
申请人： SIT S.P.A.
发明人： Massimo GIACOMELLI
摘要： A device for controlling a combustible gas supply to a heating apparatus burner includes: a valve with a respective valve seat which is associated with a corresponding closure member provided with a respective control rod for opening the valve seat, a system for amplifying movement of the control rod which has a snap-fit spring which acts on the rod and a pushing element which in turn acts on the spring, a first end of a lever acts on the pushing element which is hinged at a fulcrum location which is positioned at an opposing second end of the lever, actuator which moves the lever, operationally associated with the lever in a position between the opposing lever ends to control the lever about the fulcrum location resulting in movement of the closure member away from and towards the valve seat, the actuator comprising a linear actuator element with converse piezoelectric effect.
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