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(11) | EP 2 660 515 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Premix combustion device of gas burner |
| (57) A premix combustion device of a gas burner applicable to a domestic gas boiler or
water heater is disclosed. The premix combustion device includes a gas mixture supply
pipe to supply gas mixture to the gas burner, and a gas supply means and air supply
means connected with the gas mixture supply pipe. A damper is provided at a predetermined
position in the gas mixture supply pipe to regulate the amount of the gas mixture
to be supplied to the gas burner, degree of opening of the damper is adjusted by an
electrically operated valve controlled by a control signal from a controller, and
an valve disc arranged to open and close the gas mixture supply pipe according to
operation of the valve is provided with a plurality of holes. The premix combustion
device extends the range of controllable combustion, ensuring supply of water at a
set temperature.
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