Basic boiler combustion chamber

Abstract

 This new design enables to draw the air supporting combustion from outside through a pipe, letting it directly into the combustion area, without leaving it free to flow.

Description

[0001] The new Basic boiler, we are presently designing, features innovative characteristics as compared to the traditional closed chamber boilers, essentially as follows :

• Air chamber
• Airtight terminal flanges of the bi-thermal exchanger on the combustion chamber
• Burner's support without brackets
• Possibility to exhaust flue gas vertically or on the rear by rotating the fan exhaust elbow

[0002] Hereafter please find a description of the above characteristics :

AIR CHAMBER

[0003] In tight chamber boilers, the combustion chamber and the air chamber are completely separated from the room where the boiler is installed. The air required for combustion is drawn from outside through a pipe, is let into the top of the boiler air chamber and through this chamber is brought to the combustion area.

[0004] Normally in standard boilers, the air flows along all four sides of the combustion chamber: with the new Basic boiler, the air is always let in the top of the air chamber, but it flows to a channel on the rear of the combustion chamber to reach the exact spot where its is required, namely in the burner's venturi area (see attached drawings).

TIGHTNESS OF THE EXCHANGER FLANGES ON THE COMBUSTION CHAMBER

[0005] As said above, the sides of the combustion chamber are not enclosed into the air chamber, tightness must therefore be assured by the connection between the exchanger and the combustion chamber.

[0006] To provide such tightness, the sheet of the combustion chamber is formed above and under the exchanger with C-shaped folds filling the area between the semi-header and the terminal fin of the exchanger. Moreover to assure such tightness the C-shaped lip of the combustion chamber is pushed against the terminal fin of the combustion chamber by pins inserted between the edge of the semi-header and the C-shaped lip of the combustion chamber.

BURNER'S SUPPORT WITHOUT BRACKETS

[0007] The gas burner-header assembly is the element providing gas distribution to the various burner's ducts through nozzles, mixing gas with the air supporting combustion, and burning the resulting air-gas mixture. The alignment of the distributing nozzles with the burner's ducts must be perfect in order not to impair their operation.

[0008] This assembly is normally fastened to the combustion chamber by means of brackets welded on the header and screwed on the back of the combustion chamber.

[0009] The novelty of the header-burner assembly fastening system used on Basic boilers lays in the fact that brackets have been eliminated and the whole assembly is fixed to the combustion chamber by rectangular seats lodging the distributor ends (see drawing): fastening of the assembly is then completed by securing the gas piping on the bottom of the combustion chamber by means of a nut.

EXHAUST OF GAS FLUES ON THE REAR OR UPWARD

[0010] At present in laber boilers gas flues are exhausted only upward. The basic boiler will also provide the possibility to have gas flues exhausted toward the wall on which the boiler is mounted. Such new direction will be obtained by rotating the exhaust pipe keyed on the fan delivery orifice.

Claims

1. In Basic boiler the air let into the top of the air chamber flows into a channel located on the rear of the combustion chamber and reaches the exact spot where it is required, that is in the area of the burner's venturis.

2. The tightness of the combustion chamber to the air chamber is assured by a fastening system consisting of C-shaped folds.

3. The burner-header assembly is fastened to the combustion chamber by means of rectangular seats lodging the distributor ends.

4. The new laber boilers provide the possibility to exhaust gas flues directly on the wall where the boiler is mounted, by rotating the exhaust pipe keyed on the delivery orifice of the fan.

Drawing