Combustion apparatus

Patent metadata

Field	Value
Publication number	US-10928063-B2
Application number	US-201616063350-A
Country	US
Kind code	B2
Filing date	Oct 3, 2016
Priority date	Dec 22, 2015
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

A fixing plate for the thermal insulation material is attached to the combustion plate flange part. Provided that a direction leaving away from the air-fuel mixture ejection part of the combustion plate is defined as an outward side direction, there are disposed: on the side edge in the outward side direction of the fixing plate, bent edge parts, which come into contact with the side edge in the outward side direction of the thermal insulation materials; and a plurality of tongue-shaped pressing claws which are elongated from the bent edge part so as to press and prevent the thermal insulation materials from getting released away from the fixing plate.

First claim

The invention claimed is:

1. A combustion apparatus comprising:
a burner made up of a burner body which is supplied therein with air-fuel mixture, and a sheet-metal combustion plate which covers an open surface of the burner body and which has an air-fuel mixture ejection part; and a combustion box which has, at one end, a connection flange part to be coupled to a body flange part enclosing the open surface of the burner body and which contains therein a heat exchanger;
wherein a packing is interposed between a combustion plate flange part in a circumference of the combustion plate and the body flange part, and wherein there is also disposed a thermal insulation material overlapping that portion of the combustion plate flange part which faces an inner space of the combustion box,
characterized in: that a fixing plate for the thermal insulation material is attached to the combustion plate flange part; and that, provided a direction leaving away from the air-fuel mixture ejection part of the combustion plate is defined as an outward side direction, a side edge in the outward side direction of the fixing plate is provided with a bent edge part adapted to come into contact with a side edge in the outward side direction of the thermal insulation material, and also with a plurality of tongue-shaped pressing claws which are elongated from the bent edge part so as to press and prevent the thermal insulation material from getting released away from the fixing plate.

2. The combustion apparatus according to claim 1 , wherein, as the thermal insulation material, there are disposed:
a pair of first strip thermal insulation materials overlapping those portions of the combustion plate flange part which lie along first opposite sides that are predetermined set of opposite sides of a square which is a profile shape of the combustion plate;
a pair of second strip thermal insulation materials overlapping those portions of the combustion plate flange part which lie along second opposite sides that are the other opposite set of sides of the square;
wherein the strip fixing plate for fixing the first thermal insulation materials is attached to those portions of the combustion plate flange part which lie along the first opposite sides; and
wherein each longitudinal end part of the fixing plate is provided with: a second bent edge part which comes into contact with a side edge in the outward side direction of each longitudinal end part of the second thermal insulation material; and a tongue-shaped second pressing claw which is elongated from the second bent edge part and which presses and prevent each longitudinal end part of the second thermal insulation material from getting released away from the fixing plate.

3. The combustion apparatus according to claim 2 , wherein the combustion plate is disposed to cover a downward open surface of the burner body and wherein, in case a profile shape of the combustion plate is a rectangle, the first opposite sides are long sides of the rectangle.

4. The combustion apparatus according to claim 1 , wherein the bent edge part of the fixing plate is provided with that projected part for positioning purpose which comes into contact with, or lies to face adjacent to an inner wall surface of the combustion box.

5. The combustion apparatus according to claim 1 , wherein a positioning hole is formed in that portion of the fixing plate which overlaps a predetermined pressing claw, out of the plurality of pressing claws, and wherein a projected part formed in the combustion plate flanged part gets fitted into the positioning hole, whereby the fixing plate is positioned relative to the combustion plate flange part.

6. The combustion apparatus according to claim 1 , wherein the plurality of pressing claws are connected to one another by a bridge part bridging over those base parts of the pressing claws which are on the side of the bent edge part of the pressing claws.

7. The combustion apparatus according to claim 1 , wherein a stepped part is provided in a manner to protrude inward in that portion of the combustion box which is positioned below the fixing plate, and
wherein the fixing plate is provided with a catching part which, in case the fixing plate falls away from the combustion plate flange part, will be caught by the stepped part so as to prevent the fixing plate from dropping.

Assignees

• Rinnai Kk

Inventors

• Ono Takahiro
• Ojiro Takashi
• Takeuchi Masaru

Classifications

• F23D14/145 Primary

  combustion being stabilised at a screen or a perforated plate · CPC title

• Y02B30/00

  Energy efficient heating, ventilation or air conditioning [HVAC] · CPC title

• F23D2900/14001

  Sealing or support of burner plate borders · CPC title

• F23D14/02 Primary

  Premix gas burners, i.e. in which gaseous fuel is mixed with combustion air upstream of the combustion zone · CPC title

• F23D2203/103

  using screens · CPC title