A gas burner assembly includes a gas burner. A grate with a plurality of fingers is positioned above the gas burner. The plurality of fingers includes a sensor finger. A temperature sensor is mounted to the sensor finger of the plurality of fingers of the grate at a first end portion of the sensor finger. The temperature sensor is thermally isolated from the grate.

A bottom cup cover, a burner and a gas appliance are provided. The bottom cup cover includes a gas intake assembly defining a first gas intake channel, a second gas intake channel, and a connecting channel connecting the first gas intake channel to the second gas intake channel. The second gas intake channel is obliquely arranged relative to the first gas intake channel. The first gas intake channel has a gas inlet. The bottom cup cover defines a first primary air supplement cavity and a second primary air supplement cavity separated from the first primary air supplement cavity. The first gas intake channel is in communication with the first primary air supplement cavity, the second gas intake channel is in communication with the second primary air supplement cavity, and the connecting channel is configured to enable a gas flow to circulate between the first and second primary air supplement cavities.

The present invention is a method of optimizing radiant and thermal efficiency of a gas fired radiant tube heater. A heat exchange blower receives intake air and delivers intake air through a heat exchanger as pre-heated air to a combustion air blower. The combustion air blower receives pre-heated intake air from the heat exchanger and then provides the pre-heated intake air to a burner for mixing with fuel. The fuel-intake air mixture is burned in the burner thereby producing combustion gasses which are fired into a radiant tube. The exhaust combustion gases pass through the balance of the radiant tube and through the heat exchanger where residual heat is transferred and extracted from the combustion gases to pre-heat the intake air. The turbulators are configured to increase the turbulence within the radiant tube and are placed within the initial 10′ to 30′ of the radiant tube after the burner to increase the tube temperature and the radiation emitted from this section of the radiant tube.

A premixing apparatus has: a butterfly valve and a changeover valve for changing over, between high and low, a ventilation resistance in an air supply passage and in a gas supply passage, respectively; and an interlocking mechanism to open or close the changeover valve in interlocking with the opening or closing of the butterfly valve. In either of the small-capacity state in which the ventilation resistance in the air supply passage and in the gas supply passage is made high to attain a small-capacity state or in a large-capacity state to attain a large-capacity state, adjustments are arranged to be made to make appropriate the excess air ratio of the air-fuel mixture. An interlocking mechanism is constituted: to maintain the changeover valve in a fully-closed state when the butterfly valve lies in a predetermined first rotation angle range inclusive of the closed posture; and to maintain the changeover valve in a fully-opened state when the butterfly valve lies in a predetermined second rotation angle range inclusive of the opened posture. The rotation angle of the butterfly valve at which the excess air ratio of the air-fuel mixture becomes the predetermined appropriate value within the first rotation angle range is set to a closing-side stop angle of the butterfly valve. The rotation angle of the butterfly valve at which the excess air ratio of the air-fuel mixture becomes the predetermined appropriate value within the second rotation angle range is set to an opening-side stop angle of the butterfly valve.

A low NOx air heating swirl burner includes at least one burner unit, the burner unit comprising a combustion air duct, a fuel gas supply pipeline, a combustion nozzle and a fire protection baffle. The fire protection baffle comprises a fin and a base plate for generating swirl combustion air. The base plate includes a plurality of elongated holes and air guide blades disposed obliquely on air outlet sides of the elongated holes. The combustion air flows out of the elongated holes in the base plate of the fire protection baffle, generates a rotational flow under the action of the air guide blades to be strongly mixed with fuel gas sprayed from the combustion nozzle for combustion. The burner is in a modular form, which can adopt a corresponding splicing shape according to structural features of a heating space to meet the heating requirement.

A method of controlling a premixing apparatus that mixes fuel gas with air and supplies thus obtained air-fuel mixture, through a fan to a burner, includes at a time of changing over to a small-capacity state in which a first ventilation resistance in an air supply passage is increased and also in which a second ventilation resistance in a gas supply passage is increased, rotating a butterfly valve down to a closing side stop angle; and at a time of changing over to a large-capacity state in which the first ventilation resistance in the air supply passage is decreased and also in which the second ventilation resistance in the gas supply passage is decreased, rotating the butterfly valve up to an open-side stop angle.

A gas burner assembly includes a gas burner. A grate with a plurality of fingers is positioned above the gas burner. The plurality of fingers includes a sensor finger. A temperature sensor is mounted to the sensor finger of the plurality of fingers of the grate at a first end portion of the sensor finger. The temperature sensor is thermally isolated from the grate.

A poolside burner having a central gas feed and a burner ring having longitudinally-oriented slit-like flame orifices. The burner ring is securely attached to a burner plate having a centralized hole through which a feeder extends and mates with a central distribution tube connected to the burner ring.

A poolside burner having a central gas feed and a burner ring having longitudinally-oriented slit-like flame orifices. The burner ring is securely attached to a burner plate having a centralized hole through which a feeder extends and mates with a central distribution tube connected to the burner ring.

The present invention is a method of optimizing radiant and thermal efficiency of a gas fired radiant tube heater. A heat exchange blower receives intake air and delivers intake air through a heat exchanger as pre-heated air to a combustion air blower. The combustion air blower receives pre-heated intake air from the heat exchanger and then provides the pre-heated intake air to a burner for mixing with fuel. The fuel-intake air mixture is burned in the burner thereby producing combustion gasses which are fired into a radiant tube. The exhaust combustion gases pass through the balance of the radiant tube and through the heat exchanger where residual heat is transferred and extracted from the combustion gases to pre-heat the intake air. The turbulators are configured to increase the turbulence within the radiant tube and are placed within the initial 10 to 30 of the radiant tube after the burner to increase the tube temperature and the radiation emitted from this section of the radiant tube.