Water heater
AssigneeRinnai Corporation
InventorMasakazu Ando
Life of this patent
Estimating the term…
Abstract
There is provided an indoor mounting water heater in which combustion exhaust gas is discharged to the outdoors via an exhaust duct, wherein a decrease in draft force caused when the number of burner groups to be burned is reduced by a capacity changeover mechanism to decrease the combustion capacity can be prevented, and the heat efficiency can be improved. An air supply chamber 81 is divided into a plurality of parts 82 and 83 corresponding to a plurality of burner groups 51 and 52. The air sent from an air supply fan 84 is supplied to only a part of the air supply chamber corresponding to a burning burner group.
Claims7
A water heater comprising:
- a combustion housing having an exhaust opening at an upper end thereof, which is connected to an exhaust duct extending to outdoors;
- a burner unit which is stored in a lower part of the combustion housing and made up of a plurality of burner groups;
- a heat exchanger for hot water supply which is stored in an upper part of the combustion housing;
- an air supply fan for supplying combustion air to the burner unit via an air supply chamber provided on a lower side of an arrangement section of the burner unit in the combustion housing;
- and
- a capacity changeover mechanism for changing over combustion capacity by changing the number of burner groups to be burned,
- wherein the air supply chamber is divided into a plurality of parts corresponding to the plurality of burner groups, and comprises an air supply changeover mechanism for supplying air from the air supply fan to only a part of the air supply chamber corresponding to a burning burner group.
A water heater comprising:
- a combustion housing having an exhaust opening at an upper end thereof, the exhaust opening connected to an exhaust duct extending to outdoors;
- a burner unit stored in a lower part of the combustion housing and made up of a plurality of burner groups;
- a single air supply fan for supplying combustion air to the burner unit;
- an air supply chamber defining a plurality of distribution paths, each of the plurality of distribution paths communicating combustion air from the single air supply fan to a unique one of the plurality of burner groups;
- a capacity changeover mechanism configured to change combustion capacity by changing the number of burner groups to be burned;
- and
- an air supply changeover mechanism configured to supply combustion air to only those distribution paths from among the plurality of distribution paths which communicate combustion air to those burner groups being burned.
Dependencies are inferred from the claim text.