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US 9,513,003 B2Granted
Combustion apparatus, method for combustion control, board, combustion control system and water heater
AssigneePurpose Co., Ltd.
InventorsAkito Watanabe, Mituru Sano, Toshinobu Muku
Life of this patent
Estimating the term…
Abstract
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.
Claims18
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;
- and
- an 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.
9 more elements
A combustion control method, comprising:
- taking a combustion air and combusting a fuel to generate a combustion exhaust via a combustion means;
- exchanging heat of the combustion exhaust via a heat exchange means;
- supplying a dilution air to the combustion exhaust after a heat exchange and mixing the dilution air with the combustion exhaust to dilute the combustion exhaust by the dilution air via an exhaust dilution unit;
- and
- venting the combustion exhaust diluted via an exhaust path,
- wherein supply of the dilution air starts in accordance with a combustion start of the fuel via an exhaust dilution fan, and
- wherein the supply of the dilution air changes in accordance with amount of the combustion of the fuel via the exhaust dilution fan.
4 more elements
A combustion control system 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;
- an exhaust path venting the combustion exhaust diluted by the exhaust dilution unit from the housing, and
- a control means stopping the combustion by the combustion means if a temperature of the combustion exhaust reaches an upper temperature limit or over, and permitting the combustion if the temperature of the combustion exhaust reaches a lower temperature limit or below,
- 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;
- and
- an 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.
9 more elements
A water heater 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 for water;
- 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;
- and
- an 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.
9 more elements
A combustion apparatus comprising:
- an air supply path supplying an outside air into a housing,
- a burner taking a combustion air from the housing, the combustion means combusting a fuel to generate a combustion exhaust;
- a heat exchanger exchanging heat of the combustion exhaust;
- an exhaust dilution unit supplying a dilution air to the combustion exhaust that passed through the heat exchanger, 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 exchanger;
- and
- an 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 burner, and
- wherein the exhaust dilution fan changes a rotation speed in accordance with amount of the combustion at the burner.
9 more elements
A combustion control system comprising:
- an air supply path supplying an outside air into a housing,
- a burner taking a combustion air from the housing, the combustion means combusting a fuel to generate a combustion exhaust;
- a heat exchanger exchanging heat of the combustion exhaust;
- an exhaust dilution unit supplying a dilution air to the combustion exhaust that passed through the heat exchanger, the exhaust dilution unit mixing the dilution air with the combustion exhaust to dilute the combustion exhaust by the dilution air;
- an exhaust path venting the combustion exhaust diluted by the exhaust dilution unit from the housing;
- and
- a control unit stopping the combustion by the burner if a temperature of the combustion exhaust reaches an upper temperature limit or over, and permitting the combustion if the temperature of the combustion exhaust reaches a lower temperature limit or below,
- 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 exchanger;
- and
- an 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 burner, and
- wherein the exhaust dilution fan changes a rotation speed in accordance with amount of the combustion at the burner.
10 more elements
A water heater comprising:
- an air supply path supplying an outside air into a housing,
- a burner taking a combustion air from the housing, the combustion means combusting a fuel to generate a combustion exhaust;
- a heat exchanger exchanging heat of the combustion exhaust for water;
- an exhaust dilution unit supplying a dilution air to the combustion exhaust that passed through the heat exchanger, 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 exchanger;
- and
- an 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 burner, and
- wherein the exhaust dilution fan changes a rotation speed in accordance with amount of the combustion at the burner.
9 more elements
Dependencies are inferred from the claim text.