Abstract: A furnace has a primary heat exchanger tube, a secondary heat exchanger comprising a plurality of secondary heat exchanger tubes, a hot header configured to provide a fluid flow path between an output of the primary heat exchanger tube to an input of the secondary heat exchanger, and a perforated fluid flow plate disposed at least partially within the hot header.

Abstract: An appliance door assembly is provided that comprises a primary door pivotally coupled to an appliance and positioned to seal a cavity defined by the appliance and a secondary door slideably coupled to the primary door. The secondary door is slidable between a first position and a second position when the primary door is in a closed position. The appliance door assembly further includes first and second engagement features operable between first and second positions. The secondary door is operably coupled to a track assembly disposed within the cavity when the first engagement feature is in the first position. The first and second positions of the second engagement feature correspond with the first and second positions of the first engagement feature. The secondary door is operably coupled to a rack disposed within the cavity when the second engagement feature is in the first position.

Abstract: A motor controller for a blower in a gas-burning appliance. The motor controller includes a processor configured to receive a measured pressure differential measured by a sensor disposed in an airflow generated by the blower. The processor is configured to compute a motor speed based on the measured pressure differential and a pressure differential set-point for the gas-burning appliance. The processor is configured to operate the blower at the motor speed to drive the measured pressure differential toward the pressure differential set-point.

Abstract: A multi-leveled cooking apparatus is an apparatus that is used to prepare food. The apparatus includes an enclosure, a heat source, at least one convectively-heated cooking mechanism, a radiatively-heated cooking mechanism, a first duct, and a second duct. The enclosure is used as a structural base to mount the aforementioned components, and to maintain and regulate temperature fluctuations. The heat source sends hot air through the first duct and the second duct to heat the at least one convectively-heated cooking mechanism. The heat source is also in contact with the radiatively-heated cooking mechanism. A series of tubes within the enclosure provide adequate dispersal of combustible gaseous material, and an ignition starter allows the user to ignite the gas contained within the present invention. Removable grates are arranged at various heights within the enclosure, allowing customization of the size of the working space as well as improving accessibility for sanitization.

Abstract: A home appliance having a water-fed steaming apparatus, the home appliance including an appliance body housing the steaming apparatus; a water supply vessel for supplying water to the steaming apparatus; a vessel housing within the appliance body for holding the water supply vessel; and a mounting assembly for mounting the vessel housing to the appliance body, the mounting assembly including a bezel having a locking element; a bracket engaged with the vessel housing and the locking element; and a spacer element extending between the appliance body and the bracket to define an air gap between the vessel housing and the appliance body for air flow between the vessel housing and the appliance body for cooling the vessel housing.

Abstract: The present invention relates to an exhaust closure system (10) for a cooking oven. Said exhaust closure system (10) is inter-connectable or interconnected between a top wall (30) of an oven cavity (40) and an exhaust channel. The exhaust closure system (10) comprises a lower casing (12) attachable or attached on the top wall (30) of the oven cavity (40) and including at least one inlet opening (22) in its bottom side. The exhaust closure system (10) comprises an upper casing (14) connectable or connected to the exhaust channel and including at least one outlet opening (24) in its top side. The lower casing (12) and the upper casing (14) are permanently or detachably jointed and form a housing of the exhaust closure system (10). A stationary plate (16) and a sliding plate (18) are arranged inside the housing and between the inlet opening (22) and the outlet opening (24). The stationary plate (16) and the sliding plate (18) lie against each other and include at least one opening (26, 28) in each case.

Abstract: A method for controlling operation of a fuel-fired heating appliance having a burner, a fuel flow control for controlling a fuel flow to the burner, and a combustion air blower for supplying combustion air to the burner, includes iteratively (1) determining the quality of combustion by sensing a flame at the burner and outputting a time-varying flame current signal that includes an ionization signal from the flame; sampling the flame current signal to obtain a time record of the flame current signal; using a Fourier transformation, transforming the time record into a frequency spectrum of frequency components that include frequency components of the ionization signal, the frequency spectrum having a spectrum shaped defined by various frequency components of the flame current signal; and determining whether the frequency spectrum indicates flame stability or instability.

Abstract: Systems and methods for treating metal pipe couplings, including a frame and insulated panels attached to the frame forming an oven. A pre-heat zone and a bake zone inside the oven, the pre-heat zone separated from the bake zone by a shared oven wall. A combustion burner and recirculation blower are positioned in opposite ends of the oven in a pre-heat zone combustion/recirculation chamber. Another burner and recirculation blower pair are positioned in opposite ends of the oven in a bake zone combustion/recirculation chamber. Heated air supply plenums are fluidly connected to respective recirculation blowers, and include direction-adjustable nozzles to direct heated air generally downward onto pipe couplings moving through the preheat and bake zones. Return air plenums positioned in each of the pre-heat and bake zones each have an air inlet, and an outlet fluidly connected to respective combustion/recirculation chambers. Coating-cured metal pipe couplings made by the methods.

Abstract: A non-bypassable catalyst assisted appliance includes, for example, a housing having a combustion chamber therein. The housing has a loading door opening coverable by a door for loading fuel into the combustion chamber, an air inlet opening for receiving an air supply to the combustion chamber, and an exit opening connectable to a flue. A catalyst combustor is disposed between the combustion chamber and the exit opening. When the door of the non-bypassable catalyst assisted appliance is disposed in a closed position covering the loading door opening, gas from the combustion chamber is directed through the catalyst combustor, and out the flue. When the door of the non-bypassable catalyst assisted appliance is disposed in an open position allowing loading of fuel through the loading door opening to the combustion chamber, ambient air entering the loading door opening and gas from the combustion chamber are directed through the catalyst combustor, and out the flue.

Abstract: Described is a device (11) for controlling the combustion of a burner (1), comprising: •first means (12) for measuring the fuel flow rate (Vg); •second means 13 for measuring the flow rate of the comburent (Va) •first operator means (14) for controlling the opening of an inlet valve (5) as a function of the quantity of fuel to be supplied to the burner (1); •second operator means (15) for controlling the comburent flow regulator means (8) as a function of the quantity of comburent to be supplied to the burner (1); According to this invention, the device (11) comprises a unit (16) for controlling the first operator means (14) and the second operator means (15) as a function of the values measured by the first measuring means (12) and by the second measuring means (13).

Abstract: A heating apparatus using liquefied gas includes: a combustion unit where the liquefied gas is combusted in a vaporized state; a vaporization unit providing a vaporization space in which the liquefied gas supplied from a fuel receiving unit receiving the liquefied gas is vaporized and thermally separated from the combustion unit; and a thermoelectric element unit including a high-temperature input unit maintaining a high-temperature state by the combustion unit and a low-temperature input unit maintaining a relatively lower temperature than the high-temperature input unit by the liquefied gas vaporized in the vaporization unit and generating power by using a temperature difference between the high-temperature input unit and the low-temperature input unit, and the vaporization unit maintains a low-temperature state by using vaporization of the liquefied gas and is thermally separated from the combustion unit so as to prevent a temperature from rising by the combustion unit to increase power generation efficien

Abstract: A pumpless solar energy-based air heater includes a body housing a chamber surrounded by a heat conducting medium; an intake pipe to draw cool air into the chamber; and one or more exit pipes to push warm air out from the chamber, the one or more exit pipes having one or more structures within the interior of the one or more exit pipes to create a low friction factor for the air flowing upwards in the exit pipe while creating a high friction factor for the air attempting to move downward, thereby ensuring air flow in an upward direction; a pressure difference is created between an entry point of the intake pipe and an end point of the one or more exit pipes, thereby eliminating the need for a pump or a fan.

Abstract: A cooking apparatus includes a housing having a first cutout and a second cutout, an oven, a cook top and a vent assembly. The oven is positioned within the first cutout. The cooktop is positioned within the second cutout and the vent assembly is coupled to the oven.

Abstract: A system for storing a grill generally may include the grill and a corresponding base. The grill may have a grill body defining a cavity, and at least two legs extending from the grill body. The legs may be movable between an extended state and a collapsed state. The base may have a frame assembly selectively attachable to the grill body. When the frame assembly and grill body are attached to each other, the grill may be movable between a usable position to a storable position. A footprint of the grill may be smaller in the storable position than in the usable position.

Abstract: A method and apparatus for a gas burner head with one or more rotating burners. The gas burner head may include an outer burner and an inner burner rotating about an axis. Multiple gas burner heads may be rotatably interconnected. Rotating one or more burners within one or more gas burner heads may allow a variety of burner characteristics and/or patterns. One or more gas burner heads may be used in a variety of applications.

Abstract: A gas burner system has a gas burner with a conduit through which an air-gas mixture is conducted; a variable-speed forced-air device that forces air through the conduit; a control valve that controls a supply of gas for mixture with the air to thereby form the air-gas mixture; and an electrode configured to ignite the air-gas mixture so as to produce a flame. The electrode is further configured to measure a flame ionization current associated with the flame. A controller is configured to actively control the variable-speed forced-air device based on the flame ionization current measured by the electrode so as to automatically avoid a flame harmonic mode of the gas burner. Corresponding methods are provided.

Abstract: An afterburner system and method for reducing the CO2 and other pollutants produced by the combustion of a fuel in a combustion chamber while maintaining or increasing the efficiency of said combustion includes feeding a catalyst, preferably lithium and/or boron to the afterburner, or a preconditioning afterburner, along with the exhaust from the combustion chamber. The presence of the catalyst in the after burner results in further reduction of pollutants generated by the combustion in the combustion chamber.

Abstract: Embodiments of the inventive concept provide a dual-fuel gas-pellet burner assembly. The dual-fuel gas-pellet burner assembly can include a cooking gas line, a cooking gas igniter, a motor-driven pellet auger, a combustion air channeling section enclosing the motor-driven pellet auger and at least a section of the cooking gas line, and a dual-fuel sectioned combustion chamber including a gas combustion section and a fire pot section. The gas combustion section includes a terminal end of the cooking gas line and the cooking gas igniter disposed therein. The fire pot section includes a terminal end of the motor-driven pellet auger disposed therein. The gas combustion section of the dual-fuel sectioned combustion chamber is partitioned off from the fire pot section by an internal separator wall. A control unit including a digital temperature display, a temperature dial, and a switch can receive a user selection among three different modes of operation.

Abstract: A fresh-air intake according to aspects of the disclosure includes an outer cover having a pair of side panels disposed in a generally parallel spaced relationship, a top panel coupled to, and disposed generally perpendicular to, each panel of the pair of side panels, a bottom panel disposed generally parallel to the top panel, and a front panel coupled to, and disposed generally perpendicular to, each panel of the pair of side panels and the top panel, the front panel having a window formed therein, a supply line coupled to the bottom panel, a weir extending above the bottom panel and surrounding a junction with the supply line, a baffle disposed inside the outer cover, the baffle being disposed inwardly of the window so as to prevent infiltration of moisture into the supply line, and a weep hole formed in the bottom panel.

Abstract: A furnace including a combustion chamber for burning fuel can have increased fuel burning efficiency, increased heating efficiency, and decreased harmful emissions of combustion byproducts. A combustion air delivery system delivers primary and secondary combustion air to the combustion chamber. Primary and secondary combustion air may be delivered at amounts that increase burning efficiency. An amount of secondary combustion air can be controlled by a valve system. A heat transfer device efficiently transfers heat from products of combustion for heating an enclosed space.