Water heater
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United States of America Patent
Stats
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Nov 29, 2022
Grant Date -
Jul 9, 2020
app pub date -
Mar 18, 2020
filing date -
Sep 26, 2017
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Provided is a water heater including a burner that receives a supply of combustion air from a fan, a heat exchanger having a heat transfer tube, and a combustion chamber case in which a combustion chamber of the burner is formed in the interior thereof and which is to be capable of guiding combustion gas generated by the burner to the heat exchanger. The water heater further includes a unit case that surrounds the combustion chamber case, and a region on the outside of the combustion chamber case within the unit case serves as an air pressure chamber having a higher pressure than the combustion chamber. Thus, combustion gas leakage to the outside can be prevented or suppressed appropriately by means of a simple configuration.
First Claim
Family
International Classification(s)
- F24H:FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING H....
- F23K:FEEDING FUEL TO COMBUSTION APPARATUS
- F23L:AIR SUPPLY; DRAUGHT-INDUCING; SUPPLYING NON-COMBUS....
- F23M:CONSTRUCTIONAL DETAILS OF COMBUSTION CHAMBERS, NOT....
- F28F:DETAILS OF HEAT-EXCHANGE OR HEAT-TRANSFER APPARATU....
- F23C:METHODS OR APPARATUS FOR COMBUSTION USING FLUENT F....
- F24D:DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL H....
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