US1517643A - Oil burner - Google Patents

Description

F. KRONE ET AL OIL BURNER Filed Aug. 7, 1923 2 Sheets-Sheet 1 INVENTORS. Franczs Krone, Herman J. ANen,

o Marvm Leg s t-lohn L. Garloa gh ATTORNEYS.

F. KRONE ET AL OIL BURNER Filed Aug. '7, 1923 2 Sheets-Sheet 2 INVENTORS Franczs Krone, Herman J Allen,

Marvin Lee 3 Jgzn L. Garloagh ATTORNEYS.

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till) till) Patented Dec.

FRMGIS ONE, d. ALLEN, HEAR/Will LEE, AND some L. GARJLO'UGE, 01- WICHE'ILAL, KANSAS.

can humane.

Application tiled August 7, i923. genial lilo. QEdbd-d.

To all whom it may concern:

Be it lmown that we, lFnAivoIs KRONE, lineman d. ALLEN, Manvrn Lee, and dorm L. Gannooon, citizens of the United States, residing in Wichita, county of Sedgwick, and State of Kansas, have invented new and useful improvements in @il Burners, of which the following is a specification.

@ur invention relates to forced draft oil burners wherein air for combustion is supplied to the firepot by a motor-driven blower.

The objects attained by our invention are as follows:

it. Means for more perfect intermixture of air with vaporized oil in the firepot to increase efiiciency of combustion.

2. Means for burning oil. in such away as to prevent formation of carbon or soot in the combustion chamber.

3. Means, by improved positioning of the pilot flame, of maintainin a higher temperature of the 'firepot wit a given.- quantity of gas and of protecting the said pilot flame from air blast from the blower.

4. Means, through improved firepot con struction, of generating high temperatures with an oil fire without causing damage to or rapid deterioration of the firepot.

5. Means for simple and inexpensive replacement oii'that part of the firepot most subject to deterioration from the sheets of heat.

6. More certain means of returning excess oil to safety cutofi' valve to thereby automatically stop the operation of the burner.

Referring to the drawings, Fig. 1 is a top view of our burner. Fig. 2 is a. longitudinal section taken on line it, looking in the direction of the arrow. Fig. 3 is a. sectional view taken on line B, looking in the direction of the arrow. Fig. d is an inverted view of our burner, the base plate being removed. Fig. is a bottom view of the base plate.

1 is the air supply pipe, connecting to neck 2, said neck ada ted to enter the combustion chamber 3. he air entering said chamber (under pressure from blower not shown in the drawings}, is deflected by a member 4-, which causes said air to circulate in said combustion chamber in the direction indicated by the arrows shown in Fig. 3. 5 is a circular opening in the bottom of the combustion chamber 3 which functions as an inlet for pilot gas flame for ignition of oil vapors and as an outlet for liquid oil in case ignition is not accomplished. The

said circular opening 5 also functions to another purpose which will be described hereinafter. in the combustion chamber 3, an annular depression 6 is formed which is adapted to receive the oil fuel which is conveyed by a feed pipe 7, said pipe having valves for the control of oil and bein connected to source of supply not shown In the drawings. 8 is an annular ring supported by the walls of the combustion chamber 3. The said annular ring 8 surrounds the circular opening 9, through which is discharged the fire generated in the combustion chamber 3, the flames flaring outwardly. 10- is an ear integralwith the said combustion chamber, said ear having an aperture 11 to accommodate a leg for support for the forward part of the burner, the leg not being shown in the drawings.

On the bottom of combustion chamber is an annular flange 12, said flange having ears, 13, functioning as a supporting means for base plate 14%, said base plate having protruding m 'nbers 15 with screw holes registering with holes in said ears, the said base plate being firmly attached thereto with screws. 16 is a baffle plate for spreading the flames from the gas burner 17, said gas burner being of a standard type, the flow of gas being controlled by valve 18, which valve is preferably placed a suliicient distance from the combustion chamber as to be outside the casing of the furnace in which the burner is installed. The said gas burner 17 functions as a pilot light for ignition of oil vapors generated in the combustion. chamber 3, the gas flame being always burnmg and thereby keeping the bottom of the combustion chamber hot enough to vaporize oil as it flows from fuel pipe 7, into the annular depression 6. 20 is a circular receptor integral with base plate 14-, the function of. said receptor being to catch liquid oil which may drain downward from circular opening 5 in the bottom oi the combustion chamlit? her 3, the said oil being drained awayfrom the receptor 20 by means of oil return pipe- 21 attaching in the bottom of the receptor 20.

When the burner is set in operation the forced draft of air as above described passes into the combustion chamber 3 from pipe 1, through neck 2, taking a whirling motion following the walls of the combustion chamber and flowing in a spiral path to the center of the said combustion chamber, (meanwhile mixing wih the oil vapors arising from the oil deposited continuously in t e annular depression 6) thence rising upward through circular opening 9 at the top of the come bustion chamber 3. The passage of this forced draft through the said combustion chamber with discharge through the wide opening 9 at the top thereof, creates a movement of air upward through opening 5 in the bottom of the combustion chamber, thus stimulating-flow of gas from gas burner 17 and drawing the flame thereof into the combustion chamber 3, causing the ignition of the oil vapors, now mixed with air suflicicnt to cause clean and eflicient burning thereof.

If by any reason there is a failure of ignition of oil, the said oil will flow, into the annular depression 6 and will overflow therefrom downward from combustion chamber 3, through circular o enin 5 in the bottom thereof, the said oil col ecting in the receptor 20 to be conveyed away from the burner through overflow return pi e 21, to be deposited in an overflow or catc ment basin suspended from a safety trip valve in fuel intake pipe 7, which by its trip action stops the further flow of fuel to the burner. The said trip valve with its suspended catchment basin are not shown in the drawings.

The circular opening 5 in the bottom of the combustion chamber 3, besides functioning as an inlet for pilot gas flame for ignition of oil vapor and as an outlet for li'uid oil in case ignition is not accomplished, functions to another purpose as follows;

As above described, the forced spirallycirculatin current of air in the combustion cham er, ascending therefroml through circular opening 9, which air is impelled by the motor-driven blower above mentioned, causes a suction directly above circular opening 5, which suction pulls additional air into the vortex of whirling and burning vapor in the combustion chamber. This additional air is drawn from beneath the combustion chamber over the base plate 14. It is drawn into the combustion chamber at the region of slowest air speed, which region would normally be the locus of accumulation of carbon, but by virtueof additional fresh air being supplied to the fire at this central region, the fuel is completely consumed, leaving no carbon residues. ihis form of firepot construction taken in its entirety, therefore, accomplishes, among other desirable objects these two in particular; first; the elimination of carbon accumulations in the firepot, and second; the reduction of motive power r uired in the blower, enabling a blower of given capacity to supply air sufiicient to burn a larger su ply of uel than would be the case if t e combustion chamber had no central opening at the bottom.

Such modifications may be made in our oil burner as lies within the $00 e of the appended claims, and what we claim as new and desire to secure by Letters Patent are;

1. In a forced draft oil burner, a circular combustion chamber, said chamber having a defiective tangential inlet adapted to sp1rally circulate the air when forced into said chamber, an air supply pipe connecting with said inlet, said pipe being in alignment with the axis of said combustion chamber, said chamber having openings concentric thereto, an annular ring rabbeted in one of said openings and the bottom of said chamber being crowned forming an annular depression for containing fuel oil at the periphery of said chamber, and the opening in said bottom to function as an air inlet carrying the pilot light flame for ignition purpose, a fuel oil supply pipe communicating with said annular depression, an annular flange integral with said'combustion chamher said flange having inwardly extending ears as supporting means for said base plate, a base 1) ate havin protruding members registering with said ears so that the position of said plate provides an annular opening functioning as an air inlet, a baflie plate extending downward and engaging with the plane of said base late, a gas burner functioning as a pilot light the flame from said burner deflecting from said plate transmit ting the heat to the base of said combustion chamber, and the said burner flames function as lighting means for the gas vapor in said combustion chamber b reason of the combustion created by the circulation of air drawing the flames through the opening in the bottom of said combustion chamber.

2. In a forced draft oil burner of the kind described, the said burner comprising a circular combustion chamber, an air supply having a deflector integral with said combustion chamber and positioned so as to defleet the air spirally around the peri hery of said chamber and the bottom of said chamber being crowned inwardly, an annular ring on the opposite side being funneled extending inwar y so that the peripheral portion of the chamber is greater in cross section than the space between the crown of said bottom and the inside edge of said annular ring thereby channeling the air in the peripheral wall of said chamber, a pilot light to function as generating and lighting means, a supply pipe connecting with said combustion chamber, an oil return pipe con- .necting with an annular receptor, a base plate attached to the annular flan s of said combustion chamber, the said p ate functioning as an enclosure so that the heat from said pilot light will have greater efliciency to heat the bottom of said combustion cham- 1 her, all 'for the purpose set forth and de-

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