公开(公告)号：US11719437B2

公开(公告)日：2023-08-08

申请号：US17128443

申请日：2020-12-21

申请人： SIT S.p.A.

发明人： Michele Bortoliero ,  Massimo Giacomelli ,  Giancarlo Pirovano

IPC分类号： F23Q9/14 ,  F23N1/00 ,  F24D19/10 ,  F24H9/20 ,  F24H1/18

CPC分类号： F23Q9/14 ,  F23N1/005 ,  F24D19/1051 ,  F24H9/2035 ,  F23N2229/00 ,  F24H1/186

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.

公开(公告)号：US20210231305A1

公开(公告)日：2021-07-29

申请号：US16972115

申请日：2019-06-11

申请人： SIT S.P.A.

发明人： Nicola Lovison ,  Federico Rattin ,  Michele Benvenuto ,  Massimo Giacomelli

IPC分类号： F23N5/10 ,  F23N5/24

摘要： The present invention concerns an indication apparatus and corresponding method to indicate the output level of a pilot flame in a gas appliance provided with a thermocouple suitable to convert the energy generated by a pilot flame, which receives gas from a pilot valve, into electric voltage to power an electro valve of the pilot valve and to keep the latter open. The apparatus comprises a first and a second connector suitable to be coupled with a positive terminal and with a negative terminal of the thermocouple, a voltage measurement circuit connected to the first and the second connector, a lighting device configured to provide a light signal, a controller device coupled with the voltage measurement circuit and with the lighting device and configured to determine the switching on of the lighting device on the basis of the output supplied by the voltage measurement circuit to provide a user with an indication of when the voltage generated by the thermocouple is greater than or equal to a predefined value sufficient to power the electro valve.

公开(公告)号：US11988384B2

公开(公告)日：2024-05-21

申请号：US17296681

申请日：2019-11-25

申请人： SIT S.P.A.

发明人： Massimo Giacomelli

IPC分类号： F23N1/00 ,  F23K5/00

CPC分类号： F23N1/005 ,  F23K5/007 ,  F23K2900/05002 ,  F23N2235/16 ,  F23N2235/20 ,  F23N2235/24

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.