Combustion apparatus, method for combustion control, board, combustion control system and water heater

摘要

A combustion apparatus includes combustion means generating combustion exhaust by combustion of fuel, heat exchange means exchanging heat of the combustion exhaust, and exhaust dilution unit supplying dilution air after the heat exchange by the heat exchange means and diluting the combustion exhaust after the heat exchange, and controls a temperature of the combustion exhaust after the heat exchange below a predetermined temperature by dilution by air supply.

主权项

1. A combustion apparatus comprising:
an air supply path supplying an outside air into a housing, a combustion means taking a combustion air from the housing, the combustion means combusting a fuel to generate a combustion exhaust; a heat exchange means exchanging heat of the combustion exhaust; an exhaust dilution unit supplying a dilution air to the combustion exhaust that passed through the heat exchange means, the exhaust dilution unit mixing the dilution air with the combustion exhaust to dilute the combustion exhaust by the dilution air; and an exhaust path venting the combustion exhaust diluted by the exhaust dilution unit from the housing, wherein the exhaust dilution unit includes:
a duct allowing the dilution air to flow from the housing into the combustion exhaust after a heat exchange by the heat exchange means; andan exhaust dilution fan making the dilution air flow from the housing into the duct, wherein the exhaust dilution fan starts rotating in accordance with a combustion start of the combustion means, and wherein the exhaust dilution fan changes a rotation speed in accordance with amount of the combustion at the combustion means.