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.

According to one embodiment a valve arrangement for a gas burner is provided that includes a manual gas valve with a manual actuator for opening or closing the gas flow, and an electromagnetic valve having a movable closure member which allows opening or closing a gas passage to the burner. The electromagnetic valve is arranged in the gas valve, with the manual actuator being coupled to a rotary flow regulating element, the manual actuator being configured in order to move the closure member of the electromagnetic valve, opening the gas passage, the manual gas valve including a reduced gas flow channel which puts the inlet conduit in fluid communication with the regulating element regardless of the position of the closure member.

According to one embodiment a gas shut-off valve is provided with an intermediate port communicating a gas inlet an a gas outlet, a closing member moveable between a closed position and an open position, the intermediate port being blocked when the closing member is in the closed position. The shut-off valve includes a magnetic actuator having at least one permanent magnet and a movable element, attached to the closing member, with a ferromagnetic element adhered to the permanent magnet when the closing member is in an open position. A manual actuator of the shut-off valve is configured to move the closing member to the open position. A temperature sensing device is included that has a rod that expands and shrinks with temperature changes, with one end of the rod facing the movable element. The expansion of the rod at a closing temperature causing a pushing on the ferromagnetic element, moving the closing member from the open position to the closed position.

A knob assembly and an appliance having a knob assembly are provided. The knob assembly may include a knob configured to be rotatably installed, a knob ring configured to surround the knob and to be rotated independently from the knob, a spring configured to provide an elastic force so as to return the knob ring toward an initial position when the knob ring is rotated to a position spaced apart from the initial position, and a magnetic force provider configured to provide a magnetic force to return the knob ring to the initial position when the knob ring is at a position adjacent to the initial position.

A multi-outlet channel combination gas valve includes a valve body, a solenoid valve and a flow regulating mechanism. The valve body has a multiple of air outlets, at least two outlet channels formed between each air outlet and an air inlet of the valve body, a regulating port disposed in the at least two outlet channels, and the flow regulating mechanism can regulate the gas flow passing through each regulating port of the valve body at the same time, and a solenoid valve with a dual-coil electromagnet structure. When the valve is opened, a relatively larger current is passed, and then a very small current will be provided thereafter to maintain an operation by low power consumption. Therefore, this gas valve can be used without a mains power, and a low-level regulating structure is provided for presetting a low-level flow of each air outlet.

According to one embodiment a gas shut-off valve is provided with an intermediate port communicating a gas inlet an a gas outlet, a closing member moveable between a closed position and an open position, the intermediate port being blocked when the closing member is in the closed position. The shut-off valve includes a magnetic actuator having at least one permanent magnet and a movable element, attached to the closing member, with a ferromagnetic element adhered to the permanent magnet when the closing member is in an open position. A manual actuator of the shut-off valve is configured to move the closing member to the open position. A temperature sensing device is included that has a rod that expands and shrinks with temperature changes, with one end of the rod facing the movable element. The expansion of the rod at a closing temperature causing a pushing on the ferromagnetic element, moving the closing member from the open position to the closed position.

Electromagnetic gas valve with a gas inlet, a gas outlet, and a closure member that is displaceable between an opening position and a closing position. A maximum flow is supplied through the gas outlet with the closure member in the open position and a minimum flow being supplied with the closure member in the closed position. The valve includes a main fluid channel with a closure hole through which the maximum flow is supplied to the gas outlet. The closure member includes a secondary fluid channel calibrated for the minimum flow to pass therethrough, such that the closure member in the closed position covers the closure hole and allows the passage of gas through the secondary fluid channel.

A knob assembly and an appliance having a knob assembly are provided. The knob assembly may include a knob configured to be rotatably installed, a knob ring configured to surround the knob and to be rotated independently from the knob, a spring configured to provide an elastic force so as to return the knob ring toward an initial position when the knob ring is rotated to a position spaced apart from the initial position, and a magnetic force provider configured to provide a magnetic force to return the knob ring to the initial position when the knob ring is at a position adjacent to the initial position.

An electromagnetic valve has a magnetic coil and a movable element coupled to a valve element. The magnetic coil, when excited, conveys the movable element in one direction to move the valve element from its initial position into its active position. A control circuit for the electromagnetic valve has a current source for optionally supplying current to the magnetic coil and a measuring device for measuring a voltage level of the magnetic coil and/or a current level through the magnetic coil. A monitoring unit which is connected to the measuring device establishes a switching state of the electromagnetic valve corresponding to the position of its valve element based on the intended current supply state of the current source and the current and/or voltage characteristic measured by the measuring device and, if appropriate, determines a fault state of the current supply and/or the electromagnetic valve.