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US 2022/0316702 A1Published application
Premixing apparatus, heat source apparatus, and water heater
AssigneePurpose Co., Ltd.
InventorTsuyoshi Sei
Life of this patent
Estimating the term…
Abstract
A premixing apparatus includes a mixing unit, an air supply adjusting unit, and a gas switching unit. The mixing unit draws a fuel gas in the mixing unit by supplied air to mix the fuel gas and the supplied air with each other. The air supply adjusting unit applies a load on the supplied air flowing toward the mixing unit and switches the load. The gas switching unit switches a gas amount of the fuel gas to be supplied to the mixing unit.
Claims8
A gas switching unit comprising:
- a gas switching block having a gas path including first, second and third paths;
- a first opening and closing valve disposed on the second path to open or close the second path;
- and
- a second opening and closing valve disposed on the third path to open or close the third path, wherein
- a path area of the gas path is changed stepwise by the first path and by the second and the third paths that are able to be opened and closed.
2 more elements
Dependencies are inferred from the claim text.