US2514011A - Combined combustion chamber and heat exchanger - Google Patents

Description

July 4, 1950 A. w. RUFF COMBINED COMBUSTION CHAMBER AND HEAT EXCHANGER Fu d Spft. 4, 194a Patented July 4, 1 950 COMBINED COMBUSTION CHAMBER AND HEAT EXCHANGER Alonzo W. Rufl', York; Pa., assignor to Harvey- Whipple, Inc., Springfield, Mass.. a corporation Application September-v4, 1948, Serial No. 47,910

1 Claim. 1

My invention relates to improvements in a unitary heat exchanger or warm air conditioner which may be used with a variety of heating units such as an oil burner or the like.

It is the principal object of my invention to provide a device of the class described which is characterized by a shell or casing of any of the conventional sizes, shapes and designs having therein a plurality of interconnected chambers being arranged in spaced relation within the casing so as to provide within a minimum of space a maximum of heated surface with which air to be warmed or conditioned may come in contact.

With the foregoing and various other novel features and advantages and other objects of my invention as will become more apparent as the description proceeds, the invention consists in certain novel features of construction and in the combination and arrangement of parts as will be hereinafter more particularly pointed out in the claim hereunto annexed and more fully described and referred to in connection with the accompanying drawings wherein:

Fig. 1 is a side elevational view' of the device of my invention shown in association-with one form of a furnace;

Fig. 2 is a top plan view of the device. of my invention;

Fig. 3 is a side elevational view of my invention; and

Fig. 4 is a sectional plan view on the line 4-4 of Fig. 1.

Referring now to the drawings more in detail, the invention will be fully described.

An outer furnace casing which may be of any conventional dimension is shown in Fig. 1 for purposes of illustration as comprising a front wall ill, a rear wall l2, side walls such as H and a top wall iii. A warm air outlet I8 is provided in the form shown as being centrally disposed in the top wall l6 although it will be understood that the outlet could be otherwise placed in any other of the wall members with equally satisfactory results.

The device of my invention is adapted for insertion within this casing.

of the I device A primary combustion chamber I9 having a.

half round longitudinal lower wall has a vertical outer side wall 22 which extends upwardly in a substantially vertical direction from one side of the lower wall 20.

2 Vertically extending end walls such as 28 connect the opposite edges of the lower wall 20, the

outer side wall 22 and the inner side wall 24 so as to provide the primary combustion chamber.

An annular ring 30 is provided around an opening in one of end walls 26 substantially as is shown in Figs. 1 and 3 through which the tube of an oil burner apparatus or the like may be received.

The primary combustion chamber receives the direct flame from an oil burner or the like although it will be understood that any type of heating unit may be employed therewith with equally effective results.

A secondary chamber which serves as the heat exchanger compartment is disposed at the inner Vertically extending end walls such as 46 connect the opposite edges of the inner side wall 40, the outer side wall 42, and the upper wall 44 so as to provide the secondary chamber.

A hollow connection 50 disposed between the inner walls 24 and 40 spaces the same from each other so as to provide an inclined air passageway therebetween throughout the lengths thereof substantially as shown in Fig. 1. It will be understood that one or more of such connections may be provided.

Spacers 5| may also be provided between the inner walls 24 and 40.

One of the end walls 46 of the secondary chamber is provided with a flue'outlet 48 for the escape of the combustion gases to a chimney.

Avertical baflle 52 is provided within the secondary chamber and in the form shown in Fig. 2 it extends in a direction parallel to the end walls 46 and transversely of the secondary chamber.

A vertically extending hollow duct 60 is centrally disposed through the secondary chamber so as to provide another means of access by which the warmed air may rise as will presently be observed.

' Braces 62 are provided along the sides of the chambers in any of the conventional manners The device of my invention having been described, the operation thereof will now be explained.

Combustion is completed in the primary combustion chamber and the hot gases move upwardly through the hollow connection to the secondary chamber.

The baille member however is so positioned that the gases are not permitted to pass directly to the flue opening and to the chimney. Instead, the gases must double back and follow a circuitous route around the hollow connection 60 giving up in this passage their heat to the passing currents of the air to be warmed which is being directed upwardly from the bottom of the furv nace casing.

cific forms without departing from the essential,

characteristics thereof. Hence, the present embodiments are therefore to be considered in all respects merely as being illustrative and not as being restrictive, the scope of the invention being indicated by the appended claim rather than by the foregoing description, and all modifications and variations as fall within the meaning and purview and range of equivalency of the apa forming separate primary and secondary chambers, said primary chamber walls including an outer vertical wall and a lower wall curving downwardly, inwardly and upwardly in the form of a half-cylinder and an inner wall extending obliquely upwardly and outwardly from said half-cylinder, upper ends of said outer and inner walls secured together, and rear and forward walls secured to said walls, the forward wall provided with an opening for an oil burner, said secondary chamber walls including an inner wall spaced from and secured to the oblique inner wall of the primary chamber providing therewith an air passage therebetween and having upper horizontal and outer vertical walls with adjoining edges thereof secured together and their edges opposite thereto secured respectively to upper and lower edges of said second named inner wall, a rear end wall secured to the rear ends of the first named walls of the secondary chamber provided with an outlet and a forward wall secured to the forward ends of said walls, a hollow duct between the adjacent inner walls of the primary and secondary chambers, a hollow duct extending between the upper and inner walls of the secondary chamber'spaced from the outer and end walls thereof providing a passageway through and separate from said chamber, and a wall spaced inwardly of the rear wall and outlet of the secondary chamber extending from said last named duct to the upper and inner walls of the secondary chamber.

ALONZO W. RUFF.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 718,980 Chappell Jan. 27, 1903 2,160,269 Jorolemon May 30, 1939 2,296,545 Tichbourne a Sept. 22, 1942 FOREIGN PATENTS Number Country Date 639,003 France Mar. 5, 1928

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