COMBUSTION APPARATUS

• US 20090226854A1
• Filed: 03/03/2009
• Published: 09/10/2009
• Est. Priority Date: 03/04/2008
• Status: Active Grant

• Current Assignee: Rinnai Corporation
• Original Assignee: Rinnai Corporation
• Inventors: Ojiro, Takashi
• Granted Patent: US 8,186,996 B2
• Time in Patent Office: Days
• US Class Current: 431/351
• CPC Class Codes: F23D 14/78 Cooling burner parts
• CPC Class Codes: F23M 5/085 using air or other gas as the cooling medium

Abstract

Provided is a combustion apparatus capable of preventing a heat loss from a combustion cabinet without deteriorating a combustion performance thereof. According to the present invention, a part of an inner side surface of a combustion cabinet (1), which encloses a combustion chamber where a mixture gas erupted from a combustion plate (22) is combusted, is covered with a cover (7) made of an insulation material; and the cover (7) is provided with a concave portion (7a) at an outer side surface thereof having contact with the inner side surface of the combustion cabinet (1), and an insulation air layer (7b) is defined by the concave portion (7a).

Claims

1. A combustion apparatus provided with an all primary combustion burner, which has a combustion plate with a plurality of burner ports disposed on the top thereof, in a combustion cabinet,

wherein a part of an inner side surface of the combustion cabinet, which encloses a combustion chamber where a mixture gas erupted from the combustion plate is combusted, is covered with a cover made of an insulation material;

and

the cover is provided with a concave portion at an outer side surface thereof having contact with the inner side surface of the combustion cabinet, and an insulation air layer is defined by the concave portion.

2. The combustion apparatus according to claim 1, wherein an upper edge of an inner side surface of the cover is formed with a beveled portion.

3. The combustion apparatus according to claim 1, wherein the insulation air layer is configured to have a thickness in a range of 28% to 44% with respect to a total thickness of the cover from an inner side surface of the combustion cabinet to the inner side surface of the cover.

4. The combustion apparatus according to claim 3, wherein an upper edge of the inner side surface of the cover is formed with a beveled portion.