US1849814A - Refrigerated oil burner nozzle - Google Patents

Description

March 15, 1932. H s. WOODRUFF REFRIGERATED OIL BURNER NOZZLE Filed Dec Tnventof: Henry S. WOOd' fi- Hi s Atbo-r neg.

Patented Mar. 15, 1932? UNITED srATEs PATENT ori ice {HENRY S. 'WOODB'UFF, F SGHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMP ANY, A CORPORATION OF YORK REFRIGERATED OIL BURN NOZZLE Application filed December 17, 1980. serial lq'o. 503,035.

My invention relates to liquid fuel burn-' ing apparatus and more particularly the noz zle for spraying fuel into the burner and is an improvement over the device described and claimed in a copending application of A. R. Stevenson, Serial No. 497,519, filed Nov. 22,

, 1930, and assigned to the same assignee as the present invention.

The apparatus described in the Stevenson application above referred to consists of an oil burner nozzle for spraying fuel intoan oil burner. Surrounding and contacting with the nozzle is a casing exhausted and partially filled with a liquid having a low boiling point. A' conduit leads from the top part of this casing to a condenser and the condenser in turn is connected to the bottom part of the casing below the level of' the liquid therein. In operation the liquid due to the heat of combustion vaporizes, the vapors being carried to the condenser wherethe heat therefrom is dissipated and absorbed by the condenser and the vapors returned 'as a liquid to the casing. By thismeans it ispossible to maintain the nozzle at a relatively low tem erature during operation, substantially theoiling temperature ofthe liquid in the casing. I v It is the'principal object of my invention to provide an improved device of the character set forth above. I

" In the preferred. embodiment of my invention I provide an, oil burner nozzle adapted for vertical placement to provide a down wardly directed stream of'air and oil into the combustion chamber of an oil burner. The

nozzle consists of an inner oil' tube providedwith an automatically-actuated valve. Surrounding this'oil tube is a concentric ,air tube 60 forabsorbingand dissipating the-heat from .to the bottom of the nozzle.

for aspirating the oil from said oil tube to the vapors which result when the liquid boils during operation of the burner due to combustionconditions. In this manner the vapors are condensed upon the sides of the easing and are returnedto the liquid at the bot-. tom of the casing. The arrangement provides a compact and simple structure and eliminates various parts heretofore found necessary.

Referring to the drawings, Fig. 1 shows a cross-section ofa preferred embodiment of my invention and Fig. 2 is a section taken along the plane 22 of Fig. 1.

Referring to the drawings, the base 10 of the oil burner nozzle is provided with a hous ing 11 in which is mounted an electromagnetic coil (not .shown) for operating the needle valve 12. controlling the opening 13 in the oil tube 14 which is supported by the base-10. Surrounding the oil tube is an air tube-l5 which provides a passage for the air Oil is introduced into the oil tube 14 by means of a conduit 16 and air is introduced into the air tube 15 by means of a conduit 17 the base 10 being provided with suitable passages for connecting said conduits and said tubes. When the valve 12 is opened and oil and air are being furnished to the nozzle the passa e of the'air downwardly between the oil tu e a concentric therewith'isthe casing 20 also supported by the base 10. The casing has been exhausted through the conduit 21" which is sealed after the liquid 21 having a low boiling point, suchas alcohol, or the like, has been introduced into the casing. Due to the fact that the casing has been exhausted .the

surface pressure upon the liquid 21 is very low which further reduces the boiling point of the liquid.

Connected to the casing 20 at the upper part thereof and substantially above the level of the liquid within the casing are fins or vanes 22 which absorb the heat from the va- H pors produced when the liquid 21 boils upon combustion conditions. Surroundin the casing and the vanes 22 is a second casing 23 supported upon a suitable base 23. This casing is provided with an air inlet 24, the air belng provided to assist combustion with in the combustion chamber of an oil burner and providing a stream of cool air for absorbing the heat dissipated by the vanes and The operation of the device is as follows:

Oil and air are introduced into the nozzle by i means of the COIldllltS 16 and 17 aspointed out above and a spray is produced from the orifice 19 which is ignited by means of theignition device 26. Heat from the resulting combustion is radiated to the casing 20 which absorbs the heat and transmits it to the liquid 21. Upon boiling, vapors rise from the surface of the liquid 21 and fill the upper part of the casing above the liquid. This heat in turn is absorbed by the walls of the casing and transmitted to the fins or vanes22. The air passing down through the outer casing 23 which is introduced into the air inlet 24 and passes out of ports 25 absorbs the heat radiated by the vanes and passes it into the combustion chamber. These vanestend to maintain the casing cool and the vapors coming into contact therewith are condensed and returned to the liquid body 21 as a liquid. Thus thenozzle' is maintained at substantially the boiling casing.

It will thus be noted that I have provided a compact, self-contained, automatic, self-cooling oil burner nozzle which eliminates the necessity for providing a separate condenser and conduits leading to the same. This makes it possible to more easily manufacture the nozzle, to make it more compact, and to place i f the whole unit-in a vmost satisfactory position in relation to the oil burner as a whole.

The embodiment of the invention illustrated and described herein has been selected for the purpose of clearly setting forth the prinof m I I I What I clalm as new and deslre to secure by Letters Patent of the United States, is:

1. An oil burner nozzle havin a casing surrounding the same, said casing ing partially filled with a liquid having a low boiling point and vanes on said casing for absorbing point of the vapor within the and dissipating the heat from the vapors produced when said liquid vaporizes in response to combustion conditions whereby said vapors are, condensed and returned to the body of the fluid thereby maintaining said vapors at a relatively low temperature during combustion.

-2. An oil burner nozzle having a casing surrounding said nozzle, said casing being partially filled with a liquid having a low boiling point, vanes attached to said casing, and means for directing air against said vanes said liquid in response to combustion conditions vaporizing, said vanes absorbing theheat from said vapors and dissipatingv the same whereby said vapors are condensed and returned to the liquid, said nozzle thereby being maintained at a relatively low 'operating temperature.

3. An oil burner nozzle having a casing surrounding the same, said casing being exhausted and partially filled with a liquid having a low boiling point, vanes attached to said caslng, a second casing surrounding said first casing and vanes, and means for d recting a stream of air against said vanes, said liquid;

in response to combustion conditions vaporizcasing beingpartially filled with a liquid said casing, a second casing surrounding said first casing and vanes, for dlrecting a stream of air agalnst said vanes, sald liquid in response to combustion conditions boiling and producing a vapor, said vanes absorbing and dlsslpat ng the heat from said vapors for condensing the same whereby said nozzle is maintained at a relatively lowtemperature;

5. A vertical o1l burner nozzle having an oi l tube surrounded by an-air tube for producing-an oil spray, a casing surrounding said tubes, said casing being exhausted and .being partially filled with a liquid having a low boiling point, vertical vanes attached to said casing at the exterior thereof, a second casing surrounding said first casing. and

vanes, and means for directing a stream of air into said casing against said vanes, said second casing-being provided with ports for providing an exhaust for said air stream, said liquidin response to the heat of combustion having a low boiling point, vanes attached .to

boiling and'producing a vapor in said casing,

said vanes absorbing said heat from said vapors to condense the same, said vanes dis-' sipating the heat; from 'saidvapors in said air stream whereby said nozzle is maintained v at a relatively low temperature during combustion condltions.

6. An oil burner nozzle for providing a downwardly directed spray of air and 011 into the combustion chamber of an oil bumer including an oil tube provided with a valve, an air tube surrounding said oil tube for producing an aspirating efi'ect to spray said oil, a casing surrounding said oil and air tubes and being concentric therewith, said casing being exhausted and partially filled with a liquid having a. low boiling point vanes vertically mounted on the outside 0 said casing substantially above the level of the liquid within said casing, said liquid in response to combustion conditions producing a vapor in said casingwhen said liquid boils,

. said vanes absorbing the heat from said vapors and condensing the same, a second casing surrounding said vanes and first casing, means for (providing a stream of air through said secon casing against said vanes whereby the heat absorbed by said vanes is dissipated in the air stream within said second casing, said nozzle thereby being maintained at a relatively low operating temperature.

In witness whereof, I have hereunto set my hand this 16th (1? of December,1930. v HENR' S. WOODRUFF.

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