US2189871A

US2189871A - Liquid fuel burner

Info

Publication number: US2189871A
Application number: US162230A
Authority: US
Inventors: Albert R Thomas
Original assignee: Servel Inc
Current assignee: Servel Inc
Priority date: 1937-09-03
Filing date: 1937-09-03
Publication date: 1940-02-13
Anticipated expiration: 1957-02-13

Description

Feb. 13, 1940.

A. R. THOMAS LIQUID FUEL BURNER Filed Sept. 3, 1937 2 Sheets-Sheet 1 INVENTOR. BY fzw. www

`Feb, 13, 1940.

JA. R. THOMAS LIQUID FUEL BURNER Filed Sept. 3, 1937 2 Sheets-Sheet 2 Patented Feb. 13, 1940 LIQUID FUEL BURNER Albert R. Thomas, Evansville, Ind., assignor to Servei, Inc., New York, N. Y., a corporation of Delaware Application September 3, 1937, Serial No. 162,230

1 Claim.

My invention relates to liquid fuel burners and it is an object of thc invention to provide an improved burner which is readily refueled, simply controlled, and quickly accessible for servicing.

5 The drawings show a burner for use with a heat operated refrigerator. The burner is pivoted so that it may be swung outside of a refrigerator cabinet for cleaning or other servicing. An inverted bottle liquid fuel reservoir is provided l with an automatic valve permitting ready refueling. A fountain feed and flow control valve provides a simple control. This combination, its operation, and utility. are set forth with more particularity in the following description which l makes reference to the accompanying drawings in which:

Fig. l shows the lower part of a refrigerator provided with an absorption type refrigeration apparatus heated by a burner embodying the invvention;

Fig. -2 is a sectional view of the burner assembly taken on line 2-2 in Fig. 3;

Fig. 3 is a sectional view taken -on line 3--3 in Fig. 1 showing a side view of the burner assembly in the lower part of the refrigerator;

, and

Fig. 4 is a top plan view of the burner assembly showing the burner swung outside of the refrigerator cabinet.

A refrigerator cabinet I0 has a lower apparatus compartment I I accessible at the front by means of a door I2. The refrigerator is provided with an absorption type refrigeration apparatus including a 'generator I3 located in the apparatus compartment I I. The generator includes a tank I 4 and heating and circulating coil I5 surrounded by thermal insulation I6. The parts of the refrigeration apparatus shown and mentioned in this specification are only illustrative of the heat o input portion of any desired type of absorption refrigeration system. i

A burner assembly includes an inverted bottle reservoir Il, a cup I8, a conduit arm I9, and a burner well 20. The burner well 20 is an annular chamber open at the top and closed at the bottom. A metal gauze wick 2 I, also ring shaped, is located in the well 20. A perforated cylinder 22 is located concentrically within the upper' part of the burner well 20 and it extends appreciably above the open top of the well. The upper end of the perforated cylinder 22 is closed and the lower end is open. The burner well 28 is fastened on o-ne end of a conduit I9. The other end of conduit I9 is connected to the cup` I8. Conduit I8 not only supports the burner well but also provides communication between the lower part of the cup I8 and the lower part of the well 28. Surrounding the burner well 20 is a cylindrical -shield 23 open at the top and bottom. Below the bottom of the shield 23 and spaced therefrom is a dished shield 24 having an opening 25 n the bottom and substantially centrally thereof. The burner well 20 is directly above the opening 25. The

shields

23 and 24 are secured together with the burner well on the conduit I9. In Figs. 1, 2 and 3 the burner 4well 20 is shown located in its operative position directly beneath the lower.; end of the generator I3. In the refrigerator cabl ment door I2 is open, from the position shown in Figs. 1, 2, and 3 to the position shown in Fig. 4. In this position, the burner well is fully accessible for trimming the wick, cleaning, or other servicing.

Above the cup I8 is a spring clip bracket 3| or other suitable device for holding the inverted bottle I1. `'Ihe bottle I1 is provided with a cap 32 (see Fig. 2) which may be screwed on or unscrewed from the neck oi the bottle. The cap 32 is provided with a valve 33 on a plunger 34. `The valve 33 is urged to its closed position by a spring 35. When the bottle I1 is inverted into the cup I8, the weight of the bottle causes the plunger 34 to contact the bottom of the cup and hold the valve 33 open against the action of the spring 35.

The bottle I1 and cup I8 provide a fountain feed for liquid fuel from the bottle into the cup.

In the conduit arm I9 is a valve 35 which is adjusted by a knob 31 for regulating iiow of liquid from the cup I8 through conduit I3 to the burner well'20. The level of liquid is substantially constant in the cup I8 and at starting the level of liquid in the burner well 20 is the same as the level in cup I 8. During operation of the burner, the level of liquid in the burner well 20 is at or below the level of liquid in the cup I8 depending upon the adjustment of the valve 36 which controls flow of liquid through conduit I3.

To start, the bottle I1 containing liquid fuel,

such as kerosene, is inverted into the cup I8 and secured in the spring clips 3l. The burner well 20 is revolved through the door opening to the position shown in Fig. 4. In this position, a flame is ignited at the upper edge of the wick 2l. The burner is then turned back into its position under the generator and the valve 36 adjusted for the desired rate of flow 0f liquid fuel through conduit I9 and thereby the desired flame when the burner operation becomes steady. Air is supplied for combustion through two paths as indicated by arrows in Fig. 2. In one path, air ows above plate 26 into the opening 25 at the bottom of shield 24 and thence upward through the annular burner well 20 and perforated cylinder 22. Air also ilows upward around the outside of the burner well 20 and enters around the top of the dished shield 24, flowing downward between the

shields

23 and 24 and thence upward to the burner flame. This tortuous air flow results in steady burner operation unaffected by drafts and the like.

If the refrigeration apparatus is of a continuous type, the reservoir Il may be of any desired size since it need be refilled only when substantially empty. If the refrigeration apparatus is of anintermittent type, the intermittent burner operation may be obtained with a large reservoir by utilizing the valve 36 to shut off flow of liquid fuel at the desired end of the generating period. However, with this type of system, it will be found advantageous to provide a small bottle Il, or fill the bottle only with a desired quantity of liquid so that the amount of fuel is just suflicient for supplying the burner for the length of a desired heating or generating period. With this type of system, the burner has to be intermittently lighted as, for instance, once each day. This task is simplified by being able to -merely turn the burner Well outside of the apparatus compartment where the burner is readily accessible for lighting.

What is claimed is: y

The combination with a refrigerator having a cooling compartment and an apparatus compartment and heat operated refrigeration apparatus including a generator having a flue, 0f heating apparatus utilizing vaporization and combustion of a fuel oil and including a revoluble fuel re'servoir mounted in said apparatus compartment, a conduit for fuel connected to said reservoir and projecting laterally therefrom, a burner supported on the other end of said conduit and connected thereto, an air ue around said burner and also mounted on said conduit, said conduit being of such length so that said burner flue forms a prolongation of said generator ue, and said burner and its flue may be swung horizontally to a position outside of said apparatus compartment for servicing of the burner.

ALBERT R. THOMAS.