Water heater

Patent metadata

Field	Value
Publication number	US-11512871-B2
Application number	US-202016822589-A
Country	US
Kind code	B2
Filing date	Mar 18, 2020
Priority date	Sep 26, 2017
Publication date	Nov 29, 2022
Grant date	Nov 29, 2022

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

The invention claimed is:

1. A water heater comprising:
a fan;
at least one burner that receives a supply of combustion air from the fan;
a heat exchanger used for heat recovery;
a combustion chamber case configured such that a combustion chamber of the burner is formed in the interior thereof and so as to be capable of guiding combustion gas generated by the burner to the heat exchanger;
a unit case surrounding the combustion chamber case; and
an air pressure chamber fo…

Assignees

• Noritz Corp

Inventors

• Hasegawa Hiroki
• Akiyama Takashi
• Fukunishi Keigo
• Ota Koji
• Umakoshi Ryosuke

Classifications

• F28D2021/0024

  Mechanical Engineering · mapped topic

• F24H1/0036 Primary

  Mechanical Engineering · mapped topic

• F28D7/1638

  Mechanical Engineering · mapped topic

• F23M7/00

  Mechanical Engineering · mapped topic

• F23K5/007

  Mechanical Engineering · mapped topic