US2006849A

US2006849A - Furnace

Info

Publication number: US2006849A
Application number: US727639A
Authority: US
Inventors: Warren Marlin
Original assignee: Individual
Current assignee: Individual
Priority date: 1934-05-26
Filing date: 1934-05-26
Publication date: 1935-07-02
Anticipated expiration: 1952-07-02

Description

VJuly z, 1935. M, WARREN 2,oo6,s49

FURNACEj :filed May 2e, 1954 2 sheets-sheet 1 //$A 3j a 1f@- 1 //f July 2, 1935. M. WARREN 2,006,849

FURNAGE` Filed May 26, 1954 2 Sheets-Sheet 2 man1' @MMM l ings.

Patented July 2, 1935 UNITED STATES PATENT OFFICE FURNACE Marlin Warren, Milwaukee, Wis. Application May 2s, 1934, serial N0. 721,639

s claims. (o1. 126-101) This invention appertains to furnaces, and more particularly to novel means for obtaining a maximum amount of benefit from the fuel utilized in the heating of homes and other build- It is Well recognized that the available energy in various type of commercial fuel is not used to its greatest advantage, and that a large proportion of the heat units are Wasted. This is particularly true of the so-called hot air furnace, which, in some respects, is particularly desirable in home heating, asl it allows the continuous supply of fresh heated air to the rooms,

Oil is a very desirable form of fuel, but as far as I am aware, oil burners have not been successfully used in hot air furnaces, due to the fact that the volumeof air heated is small in com`v parison to the amount'of heat generated and the amount of fuel used.

Therefore, one of the salient objects of my invention is the provision of a hot air furnace embodying novel means for heating the air flowing through the furnace, through the medium of water circulated around the combustion chamber, the air flowing around hot water pipes located in the path of the air stream, which communicate with thev circulating pipe.

Another salient object of my invention is to provide a hot air furnace utilizing an oil burner, with novel means for obtaining a maximum amount of heat therefrom, by the use of hot water through banks of pipes disposed in the hot air box of the furnace.4

A further object of my invention is the pro- 0 vision of novel means for circulating the water through the water jacket,vor boiler, so as to insure a continuous iiow of heated water through the banks of water pipes located in the hot air box, a water arch being disposed directly within the combustion chamber having communication at it upper and lower ends with thewater in the jacket.

A further object of my invention is the provision of novel means including a blower for initially forcing `the incoming air around the hot Water casing, or boiler, thence around the banks of hot water pipes located in the hot air box, and

0 finally subjecting the air, prior to its flow into the hot air distributing pipes, to the superheating influence of a radiator consisting of smoke flues utilized for connecting the combustion chamber with the smoke outlet pipe.

A further object of my invention is the provision of means for causing a triple flow of air through the furnace to insure `the proper raising of the temperature thereof, the air being forced into the bottom of the furnace between the jacket and the outer shell of the water compartment, up the sides of the furnace, and thence into the inner shell, or hot air box, where the air again travels up and out to the air distributing pipes, the hot, air box having means therein for humidifying the air.

A further object of my invention is the provision of a vertical smoke flue, or column, leading directly `through the water compartment, or' boiler, from the cumbustion chamber, so that the water in said compartment, or boiler, will be effectively heated by said iiue.

A still further object of my invention is the provision of an improved oil burning hot air furnace of the above character, which will be durable and efiicient in use, one that will be simple and easy to manufacture, and one which will be of a compact and rugged construction.

With these and other objectsin view, the invention consists in the novel construction, arrangement, and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying. drawings, in which drawings:

Figure 1 is a vertical section through my improved furnace.

Figure 2 is a horizontal section through the furnace, taken on the line 2-2 of Figure 1, looking in the direction of the arrows.

Figure 3 is a vertical section taken at right angles to Figure 1, and substantially on the-line 3-3 of Figure 1, looking in the direction of the arrows.

Referring to the drawings in detail, wherein similar reference characters designate corresponding parts throughout the .several views, the letter A generally indicates my improved furnace, which comprises an inner main casing 5, and which forms a water compartment, or boiler.

This casing 5 may include spaced longitudinally extending side walls 6, end walls 1, and top and

bottom walls

8 and 8. The casing 5 is surrounded by an outer jacket I0 formed of sheet metal, or the like, built on a desired type of base and surrounded by a `curbing' 9. The jacket is disposed in spaced relation to the casing, and the space between the jacket and the casing constitutes an air conduit I9, as will be later set forth. j

Arranged within the casing 5 is a combustion chamber Il. This combustion chamber Il is of a narrower Width than the casing, and of a less length than said casing, and has communicating with its front end a vertically extending flue I2 which extends through the water compartment and out the top wall 8 of the casing. A hot air dome I3 extends over the casing and shell, and has communicating therewith the hot air distributing pipes I4, which lead to the various rooms of the building to be heated.

'I'he forward end of the combustion chamber II is provided with an inlet mouth I5 which opens out through the front of the furnace, and this inlet mouth receives the combustion and discharge tube I6 of an oil burner I1. The oil burner I'I can be of any preferred type or make.

Arranged within the casing, in spaced relation to the side and end walls thereof, is a relatively large hot air box I8, which forms the inner shell of the casing 5. This hot airbox I8 depends from the top wall 8 of the casing, and opens out through said top wall into the hot air dome I3. The lower end of the hot air box terminates above the combustion chamber II, for a purpose which will be later set forth.

Extending into the opposite sides of the hot air box I8 are relatively wide hot air inlet pipes, or flues, 20, and these inlet flues communicate with the opposite sides of the hot air conduit I9 midway its ends. A fresh air inlet opening is provided at the extreme lower end of the air conduit I9, preferably at the rear thereof,l

and the air is forced therein by means of a blower 35, which can be of any preferred character or make.

From the description so far, it can be seen that the cold fresh air enters from the bottom of the furnace and flows up around the outer face of the boiler, or casing, and is initially heated by the hot water therein. The air then enters the conduits 28 and ows up the hot air box I8. Thus, the air circulates three times through the furnace.

After the air leaves the hot air box, the same flows into the dome, and thence into the hot air distributing pipes.

The rear part of the dome I3 supports a header 2| which has communicating therewith the smoke outlet pipe 22. This pipe 22 leads to the chimney, and a damper 23 can be arranged in said pipe. As heretofore stated, the vertical column, or ue, I2 of the combustion chamber extends through the top wall 8 of the casing, and this extended end of the column, or flue, I2 has communicating therewith a plurality of flue pipes 24, which open into the header 2I. Thus, the products of combustion ow through a plurality of flue pipes locatd in the dome, and the same constitutes a radiator, so that the air, prior to its exit from the furnace, is subjected to a nal, or superheating, process.

In accordance with my invention, I fill the casing 5 with water, and thus this water entirely surrounds the combustion chamber II with its vertical flue, or column, I2, and the hot air box I8, The casing can be lled with water through the medium of a water pipe 25, which can be connected to any source of water supply, such as a city main. A control valve 26 is interposed in the length of this pipe for governing the flow of water to the casing.

Various control means can be provided for the furnace, and thus the same can be provided with a safety valve 21, a sight glass 28, and a thermometer 29.

In order to insure the thorough heating of the water, and the proper circulation thereof,

I arrange a water arch 30 in the combustion chamber. This water arch 30 consists of a plurality of water pipes 3I, and thev same are disposed in parallel relation and at an angle to the horizontal. The extreme lower ends of the tubes, or pipes, 3l extend through the rear wall of the combustion chamber and communicate with the lower part of the interior of the casing. The forward upper ends of the tubes, or pipes, 3| are extended for a considerable distance in the smoke flue, or pipe, I2, and the same are finally passed through one Wall of this pipe, or flue, for communication with the upper part of the interior of the casing.

In order to protect 'the water arch from the direct flame, the outlet end of the oil burner is surrounded with a guard 32 located directly below the water arch. Extending longitudinally through the hot air box I8 are horizontally disposed rows, or banks, of hot water pipes, or tubes, 33. These hot water pipes extend through the opposite end walls of the hot air box, and communicate with the interior of the casing. The pipes of the rows of pipes are staggeredly related to one another, so as to insure proper flow of air around the same.

In use of my improved furnace, the temperature of the water is quickly raised by the oil burner, and this is enhanced due to the water pipes located directly in the combustion chamber. Obviously, as the water is heated in the pipes 3l, the same rises and exits into the upper part of the casing. This hot water will circulate through the water tubes 33 located in the hot air box, and as the water in these tubes becomes cold by the flow of air thereabout, the same is re-heated by the tubes 3I.

The air flow-through the hot air box has its temperature quickly raised by the same flowing past the banks, or rows, of pipes 33, and obviously the walls of the box itself are heated by the hot water thereabout. As the heated air leaves the hot air box, the same ows past the smoke pipes 24, which tends to increase the temperature of the air.

From the foregoing description, it can be seen that I have provided novel means for effectively utilizing an oil burner in conjunction with a hot air furnace, and for insuring the proper heating of the air.

I also prefer to arrange in the lower part of the hot air box a humidifying device. The desired amount of Water is admitted into the box by a float-controlled valve 36. Obviously, the air sweeping over the water is humidied thereby.

My device is so arranged and constructedthat the same can be utilized during the summer season for cooling air flowing therethrough. The device is, therefore, susceptible as a heating medium in the winter season and a cooling medium in the summer season for a home.

Changes in details may be made without departing from. the spirit or the scope of my invention, but what I claim as new isi- 1. A hot air furnace comprising a water casing, a hot air jacket surrounding the sides and bottom of the water casing, said jacket having a cold air inlet at its lower end, a fuel combustion chamber in the lower part of said casing, a hot air box disposed in the casing above the combustion chamber having tubes extending therethrough communicating with the water in said casing, a hot air dome arranged above the casing for receiving the hot air from the box,

Cil

the box having air inlets connecting the lower end thereof with the space between the jacket and the casing intermediate the ends of the furnace, and hot air distributing pipes communicating with the dome.

2. A hot air furnace comprising a water receiving casing, a jacket disposed entirely about the sides and bottom wall of the casing, defining a hot air conduit thereabout, the lower end of the conduit being provided with a cold air inlet, a fuel combustion chamber in the casing, a hot air box arranged in said casing above the combustion chamber for the circulation of water thereabout, a hot air dome carried by the casingA communicating with the upper end of the box, the opposite sides of the hot air box being provided with inlets communicating with the hot air conduit intermediate the ends thereof, a plurality of hot air distributing pipes communicating with the dome, and an air blower communicating withthe inlet of the conduit, said blower forcing the air up the conduit around the bottom and sides of the casing, thence into the inlets of the hot air box, and up through `the box into the dome.

3. A hot air furnace comprising a water receiving casing, a jacket disposed entirely about the sides and bottom wall of the casing, defining a hot air conduit thereabout, the lower end of the conduit being provided with a cold air inlet, a fuel combustion chamber in the casing, a hot air box arranged in said casing above the combustion chamber for the circulation of water thereabout, a hot air dome carried by the casing communicating with the upper end of the box, the opposite sides of the hot air box being provided with inlets communicating with the hot air conduit intermediate the ends thereof, a plurality of hot air distributing pipes communicating with the dome, an air blower communicating with the inlet of the conduit, said blower forcing the air up the conduit around the bottom and sides of the casing, thence into the inlets of the hot air box, and up through the box into the dome, and an air humidifying de-l vice arranged inthe hot air box.directly,.below said air inlets.

4. A hot air furnace comprising a water casing, a fuel combustion chamber in said casing, a hot air box disposed in the casing above the combustion chamber having tubes extending therethrough communicating with the water in said casing, a hot air dome arranged above the casing for receiving the hot air from the box, air inlets communicating box, and hot air distributing pipes communicating with the dome.

5. A hot air furnace comprising a casing for the reception of water, a fuel combustion chamber arranged in said casing, a hot air box arranged in said casing above the combustion chamber for the circulation of water thereabout, a hot air dome carried by the casing communicating with the upper end of the box, air inlet pipes communicating with the lower end of the box, a smoke outlet pipe, and a plurality of with the lower end of thel flues disposed in the hot air dome above the hot air box connecting the combustion chamber with the smoke pipe.'

6. A hot air furnace comprising a vertical casing for the reception of water, a combustion chamber arranged within the casing, a hot air box disposed in'the casing, a hot air dome carried by the casing communicating with the upper end of the box, a plurality of air distributing pipes communicating with the dome, oppositely directed air inlet pipes communicating with the power part of the box, a plurality of hot water conducting pipes disposed in the hot air box having their opposite ends communicating with the interior of the casing, a smoke pipe, and a plurality of flues disposed within the hot air dome above the box communicating with the combustion chamber and the smoke pipe, constituting a radiator for superheating the air prior to the entrance thereof into the air distributing pipes.

'7. A hot air furnace comprising a vertical casing for the reception of water, a combustion chamber arranged within the casing, a hot air box disposed in the casing, a hot air dome carried by the casing communicating with the upper end of the box, a plurality of air distributing pipes communicating with the dome, oppositely directed air inlet pipes communicating with the lower part of the box, a plurality of hot water conducting pipes disposed in the hot air box having their opposite ends communicating with the interior of the casing, a smoke pipe, a plurality of flues disposed within the hot air dome above the box communicating with the combustion chamber and the smoke pipe, and a. water arch in said combustion chamber including a plurality of inclined Water conducting tubes having their upper and lower ends in communication with the interior of the casing.

8. An oil burning hot air furnace comprising a casing for the reception of water, a re box disposed in the casing having an inlet opening out through the furnace for the reception of the inlet end of an oil burner, a vertically disposed column connectedwith there box and extending through the casing and the water therein and out of the top wall of the casing, a dome carried by the top wall of the casing receiving the closed upper end of the column, a hot. air box disposed in the casing above the fire box and having communication with the dome, a plurality of hot air distributing pipes communicating with the dome, a plurality of hot water conducting pipes disposed in the hot air box having communication at their opposite ends with the interior of the casing, a smoke pipe, a plurality of fiues constituting a radiator, arranged in the dome connecting the column with the smoke pipe, and a plurality of water conducting pipes disposed in the re box arranged at an incline to the horizontal with the opposite ends of said pipes communicating with the interior ofthe casing.

MARLIN WARREN.