A knob assembly includes a front panel, a knob located at a front panel of an appliance and configured to rotate based on operation by a user, a valve shaft that is coupled to the knob and that extends through the front panel, a valve connected to the valve shaft and configured to control supply of gas to the appliance, and a knob sensor configured to detect a rotational position of the valve shaft. The valve shaft is configured to control the valve to adjust a flow rate of gas based on rotation of the valve shaft.

The disclosure relates to a gas grill and control method thereof. The gas grill comprises a housing defining a cooking chamber, a plurality of cooking zones in the cooking chamber, wherein each of the plurality of cooking zones is corresponding to at least one heating module, a gas supply module configured to provide gas to the at least one heating module of each of the plurality of cooking zones, a control module configured to control the gas supply module and the at least one heating module corresponding to each of the plurality of cooking zones based on a control input, and a user interface configured to generate the control input, wherein the control module is further configured to group at least two of the plurality of cooking zones to a cooking group based on the control input and control the heating modules corresponding to the cooking group based on the control input.

A cooking gas safety apparatus is shown and described. The apparatus includes a cooking gas safety valve assembly that supplies cooking gas to one or more burners. The cooking gas safety assembly includes at least one coil that is energizable to hold the valve assembly in an open position when subjected to a current that exceeds a threshold value and a hold open circuit. The hold open circuit comprises the coil and a hot surface igniter that is in electrical communication with the coil. The valve assembly is actuated by manually opening the valve and energizing the igniter such that it receives a threshold current that corresponds to an autoignition temperature of the gas. At the threshold current, an electromagnet in the cooking gas safety valve assembly holds the valve open so that it remains open without user intervention. In the event of an igniter failure, the current flow to the coil ceases, causing the valve to shut and cease gas flow to the burner. In certain examples, hold open circuit allows the igniter to operate off of alternating current while the coil receives a time-varying, direct current.

The disclosure relates to a gas grill and control method thereof. The gas grill comprises a housing defining a cooking chamber, a plurality of cooking zones in the cooking chamber, wherein each of the plurality of cooking zones is corresponding to at least one heating module, a gas supply module configured to provide gas to the at least one heating module of each of the plurality of cooking zones, a control module configured to control the gas supply module and the at least one heating module corresponding to each of the plurality of cooking zones based on a control input, and a user interface configured to generate the control input, wherein the control module is further configured to group at least two of the plurality of cooking zones to a cooking group based on the control input and control the heating modules corresponding to the cooking group based on the control input.

A gas control valve (1) has a central module (40), a control module (20) and a sensor module (30). Gas can flows through the central module (40) from a valve inlet (41) to a valve outlet (42). The control module (20) is directly on the central module (40) and controls a flow of the gas through the central module (40). A throttle element (23) is fluidically arranged between the valve inlet (41) and the valve outlet (42). The sensor module (30) is arranged directly on the central module (40) and has at least one sensor (31, 32) in operative connection with the gas flowing through the central module (40) through a gas inlet (44) fluidically arranged between the throttle element (23) and the valve outlet (42). In order to control the pressure, it detects a pressure difference between the gas flowing through the central module (40) and air having a reference pressure.

Systems and methods for a gas train assembly for an automated cooking system are provided. In one embodiment, the gas train assembly includes an electronic controller, a booster, a first burner assembly, and a first mass flow controller. The electronic controller is configured to identify a recipe associated with an order for a food item. The booster is configured to increase the pressure of the gas to a high-pressure value. The first burner assembly is downstream from the booster. The first mass flow controller is interposed between the booster and the first burner assembly. The first mass flow controller receives a first burner setting from the electronic controller. The first burner setting is based on the recipe. The first mass flow controller allows gas to flow through the first mass flow controller and toward the first burner assembly at a first pressure value corresponding to the first burner setting.

Flow modulator (10) for a fluid like combustion gas, comprising: a housing (11), a modulator body (14) positioned with the housing (11), and a valve body (18) positioned with the housing (11). The modulator body (14) has a flow channel (15) and an opening (16) providing together a flow passage (17) for the fluid. The valve body (18) is provided by a foil element (19), wherein the foil element (19) has an opening (20) for the fluid, wherein the foil element (19) is rotatable relative to the modulator body (14) to modulate the flow of the fluid by adjusting an overlap between the opening (20) of the valve body (18) and the flow passage (17) of the modulator body (14), and wherein the foil element (19) is positioned up-stream of the modulator body (14) such that an inlet pressure of the fluid presses the foil element (19) against the modulator body (14) thereby providing a sealing level between the foil element (19) and the modulator body (14).

A method for controlling a fuel-oxidizer mixture in a premix gas burner includes: receiving a flame signal representing the presence of a flame deriving from the combustion of a fuel of a first predetermined type or a second predetermined type inside a combustion cell; accessing fuel data representing the fact that the gas fuel belongs to the first type or the second type; generating drive signals to control a gas flow regulating valve that supplies gas to the burner and to control a rotation speed of a fan configured to take in oxidative air; sending the drive signals to the gas flow regulating valve and to a motor connected to the fan. A memory unit contains first regulation data and second regulation data and is programmed to generate the drive signals based on the first regulation data or on the second regulation data, depending on the fuel data.

A gas cooktop includes a cooktop body having a burner head which when activated generates a fire for heating cookware placed on the burner head, and a control system which includes a fire detection apparatus installed over the burner head and is aligned with the burner head. The control system further includes a control apparatus receiving a signal of the fire detection apparatus to control the fire of the burner head. The control apparatus determines, depending on whether the fire detection apparatus detects the fire of the burner head, whether cookware is placed on the burner head. By using such a gas cooktop including the control system, the gas cooktop automatically adjusts the fire to a minimum after a user removes a cookware, thus reducing fume in a kitchen and reducing gas consumption.

A burner system for use in a gas cooking grill has a primary burner in a firebox providing heat to a cooking surface above the primary burner and a secondary burner in the firebox selectively providing heat to a cooking grate such that ignition of the secondary burner provides an additional degree of heat to the cooking surface above the primary burner.