US1733628A - Water-heating apparatus - Google Patents

Description

oct. 29, 1929.

M. C. REcK WATER HEATING APPARATUS Filed M ay l, 1929 2 Sheets-Sheet l oct. 29, 1929. M., c. RECK 1,733,628,

WATER HEATING. APPARATUS Filed May l, 1929 2 Sheets-Sheet 2 INVENTOR Patented Oct. 29, 1929 Unirse STATES lfTAURUS C. RECH, OF ROCHESTER, NEW YORK7 ASSIGNOR TO- STERLXNG RANGE k.AND

PATENT OFFICE FURNACE CORPORATTON, vOF ROCHESTER, NEW YORK, A CORPORATION OF EW YORK Application filed May 1,

The present invention relates to water heating apparatus and more particularly to the type employed in connection with gas stoves or ranges where different fuels are used, such for example, as coal and gas. One object of the invention is to provide improved apparatusof this class which is eflicient in service, comparatively simple in construction and convenient to operate.

A further object of the invention is to provide improved means by which to effect a reduction in the temperature of the productsy of combustion after leaving the combustion chamber and before reaching the discharge pipe leading from the stove whereby to avoid the danger of fire due to Xcessive temperature in the pipes.

A further obj ect of the invention isto provide an improved heating arrangement including means for controlling the products of combustion designed to insure economy in the use of the fuel with an increase in the heating capacity. n

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

ln the drawings: f

Fig. 1 is a side elevation of the upper portion of a stove embodyingthe invention;

Fig. 2 is a fragmentary part sectional elevation illustrating" the arrangement ofthe heating coils and associated parts;

Figf is a transverse sectional elevation taken suhstantiallyon line 3M-3a of Fig. 2;

Fig. 4; is a part sectional plan taken substantially on line t-4L of Fig. 3.

Fig, 5 is a fragmentary sectional plan taken on line 5"-5 of Fig. 2 and p Fig. 6 is a sectional plan taken on line (5L-6u on Fig. 2. i

Similar reference numerals throughout the several viewsindicate the same parts.

The present construction comprises generally a stove or range embodying a heating arrangement havingy separate combustion chambers. the heat from either one of Which may he utilized to heat the water in the circulating WATER-HEATING APPARATUS 1929. serial No. 359,656.

system, or if preferred both may be used at the same time to afford a more rapid increase in the temperature of the water. One of the important features ofthe invention embodies the improved means for insuring the passage y of the products 'of combustion into more direct relationship with the coilsin the gas heated chamber, along with means for retarding the passage of the gas fromthe chamber whereby to economize inthe use of fuel while maintaining the efliciency'of the apparatus and reducing thetime required to heat the water toa givendegree `of temperature.

The apparat-us further embodies the com- 'i bination of a cooling space kor spaces in the' form of one or more chambers between the outlet ypipe for the gas and the combustion chamber along with an `improved arrangement for delivering cold airto said chambers for reducing the temperature of the products of combustion therein in order yto avoid eX- cessive temperatures within the outlet pipe from re likely to rear walls and also with a vertical main side y wall comprising the upperand lower sectionsk 15 and 16 respectivelyv as best` shown in Fig. The oven compartments "arennot shown, but one of the side walls therefor'is indicated at 17, and the smoke pipe for ycarrying olf the products'of combustion is shown at 18, Fig. 3.

The fire box for burning coal or the like is designated at 19 and isprovided withgrate sections`20 and fire brick walls 21 at the front,` back andalong one sidewhich are neferably carried by a frame`22 supported by the walls 16 and 17 as shown in Fig.' 3.

The outerside of the fire box is closedbyfa hollow casting forming a water compart-` ment7 the inner wallof the castingbeing indicated at 23an'd the outer wallat 24. A horizontal. partition 25 kseparates they compartment into lower and upper chambers 26 and?? which arelconnectedwth inlet and outlet pipes 2S and 29 respectively. These pipes are connected with the water supply or rboiler (not shown). Y One or more openings 30 are formed in the Wall of the partition Yto permit the water to Vcirculate from the lower to the upper chamber. The casting is suitably supported by the upper and lower sections 15 and 1G or" the left side wall of the stove as viewed in Fig. 3.

For the purpose of, heating the water when the tire box is not in use a gas burning chamber 31 is employed adjacent the outer wall 24 or" the casting. Arranged within this chamber are a plurality of water conducting coils 32 each having an inlet portion 33 connected with the lower chamber 26 and an outlet portion 34 connected with the upper chamber 27, it being understood that the water circulates simultaneously through the coils7 passing from the lower chamber to the coilsand discharging therefrom into the upper chamber. A cone-shaped member 35 is placeduithin each coil with vits smaller end at the bottom 01"' the coil, the purpose of these members beingfto spread and retard the products of combustion when passing through the coils whereby to increase the eiiiciency of the heater. The cone-shaped members being larger at their upper than at their lower ends tend to delay or choke the passage of the burning gas within the coils and to direct it against the surfaces thereof whereby to more electively heat the same.

VBeneath the. heating chamber 31 is located a longitudinally extending gas burner 36' which is supported at its rear end by a lug 37 extending through an opening 38 in the rear wall 12 of the chamber which forms a support for the lug. The burner is support.- ed adj acont its front end by lugs 39 on 'the wall sections 13 and 16 respectively as shown in ll ig. 3. Connected with the burner is a Vshort mixing pipe v40 or' the usual construction, into the lower end of which projects the .discharge nipple of a'valve 41 connected with a suitable manifold or supply pipe 42, Fig. 2.

y Beneath the burner isv a bottom plate 43 the rear end of which is slotted at 44 to receive the mixing pine 40, said end being supported bya' collar 45 on the mixing pipe.v

ihe front endor" the plate 43 rests on an inwardly projecting flange-like portion 46 of a door or closure 47 tor an opening in the front wall 11 opposite the front end of the burner The plate 43 is preferably secured to said flange-like portion by a bolt 48. rilhe closure 4T-is provided with two inwardly projecting'lugs 49, Figs'2 and 5, which rest' upon lugs'or abutments 50 on the walls 13 and 16 between which the burner is disposed. An additional lug 51 projects inwardly from the closure 47 and engages the inner face of the wall 13 to Steady and prevent lateral shitting of the closure. A pivoted latch 52 is provided for holding the closure in position as indicated in Fig. 2. The closure has a flange 53 at right angles to its face which abuts the end of the lower portion oi the side wall 13. kThe plate is provided with a plurality of openings 54 for the admission or Secondary air to the burner chamber. Furthermore, the sides of the plate are slightly spaced from the walls 13 andl, Fig. 3 to afford openings 55 and 56 for admitting an additional supply of secondary air to the burner chamber. The Yplate 43 is in the form or a shallow pan, designed to catch the drippings from the coils 327 due to condensation, which will be quickly evaporated by the heat from the burner. .T he side walls of the pan are formed by turning up the peripheral edge portion oi' the plate, as at 43a and providing opstanding portions 44fL surrounding the openings 54.

T he closure 47 and the pan attached there o cabe readily withdrawn as a unit so that lie burner and mixing pipe 40, constituting ..1..-other unit, may be quickly detached by a .ongitudinal movement through the opening irotected bv the closure, after the rear end c he burner has been lifted sufficiently to vr .iit the lower end oi the mixing pipe to l af the discharge nipple on the valve 41. By suspe ding the burner in the manner described it will be seen that it can be detached and cleaned whenever necessary and reinserted wi hout the use of tools for disconnecting any parts of the burner or the supporting means therefor.

interposed between the rear coil 32 and the wall 12 is a channel-shaped member 57 which is closed at its top and bottom, but which is preferably open at its ends, said ends being slightly spaced from the walls 13 and 24, the latter being the outer wall of the casting through which the water circulates. An insulating air space 58 is thus provided between the rear coil 32 and the wall 12 'for conservingthe heat and also Jfor protecting the wall 12 from the high temperatures Yof the combustion chamber. A secondV channel-shaped member 59 is interposed between the first coil 32 and the wall 11 'for the same purpose with an insulating air space 60 between saidparts. Said channel-shaped members also constitute means 1for causing` the heated gas at the ends of thechamber31 Vto be directed upwardly into contact with the end coils 32 whereby to insure greater etiiciency inthe heating capacity of the chamber. The channelshaped members are held in position by one of more screws 61 serving to clamp the members in the position shown. The Vchannels 57 and 59 can be readily removed-through the door opening and new channels subs-ti.- tutcd when desired. The channel 57 has an inwardlyjprojecting shelf-like portion 62 with its inner edge shouldered to receive one end of a cover plate V63 the opposite end of which is formed for support by the upper portion of the channel 59 as shown in Fig. 2. A pivoted latch y64C is carried by said shelflike portion for holding the cover plate in position to close the chamber 31, said plate being removable through the door openings when the latch is released. TheA cover is curved upwardly at its inner edge and is shouldered as indicated in Fig. 3 to engage the bottom edge of the wall and the outer face thereof as well. .The cover is disposed directly over the coils 32 to check the iiow of gas from the heating chamber. The cover, at a point overthe left hand coil 32 Fig. 2, has an opening 63a for the escape of the products of combustion and is also cut away at 645L for the same purpose. A more rapid escape of the gas at this point is desirable in Fig. is provided with an inturned flange 78 which.

for the reason that it accumulates faster at the end of the chamber than elsewhere due to the proximity of the inlet pipe 40 to the discharge ports at the left hand end of the burner.

The side wall 15 above the heating chamber 31 is provided with an outlet passage 65 leading to a cooling chamber or Hue 66 above the iire box 19 which is in direct communication with the outlet pipel8. When relying entirely on the burning of fuel in the .tirebox 19 to both heat the stove and the water passage may be closed by a damper 67 as shown by the dotted line positioned in Fig. 3. The damper is provided with trunnion like portions 68 and 69, the latter of which is preferably made detachable, said portions i being journalled in suitable bearings70 projecting from the wall 15 as shown in Fig. 3. The trunnion 69 is extended through the wall 11 and carries a handle or operating portion 71 for swinging the damper to and from closed position. The damper may be locked in open position by a pivoted latch 7 2, which forms no part of the present invention. The t-runnion 68 is extended through the left hand wail. 12 of the heating chamber 81 and is provided with a crank armr 7 3 to which is connected a rod 74, the lower end of which connects with the operating portion 75 of the gas inlet valve indicated generally at 41 in Fig;

2. lilith this larrangement for moving the damper to and from closed position the valve will be automatically closed and openedk to control the supply of rgas to the burner.y

he vertical portion of the door 14 is spaced from the plane of the wall 13 and is provided with inwardly projecting lugs 76 for supporting a vertically disposed plate 7 7 relatively close to the heating coils 32. y The lower end of the .plate 77 is substantially coincident with the lower wall section 13 as rshown 3. Theupperend of the saidplate overlies the cover plate 63, thus forming a choke chamber 79 for the products of combustion which servesto delaythe passage of the gas on its `way to cooling chambers 80 and 66 and the outlet pipe 18. yThe plate 77 is provided with a plurality. of V-shaped ribs 81, only one of which is shown. `These ribs are disposed opposite the openings between the coils 32 whereby to aiford an opening of more uniform proportions for the passage L0f the gas discharging intothe choke chamber 79. y

By spacing the plate k77 from the door ak cold air passage 82 is provided which is open at its lower end for substantially the full length of the door. The passage 82 terminates at its upperend in a somewhat restricted outlet 83 formed bv spacing the ange 78 but slightly below the lower edge of the upper wall section 13. The cold air discharging through the outlet 83 enters the cooling chamber 80 in which the damperoperates and into which a considerable portion of the heated gas is discharged from the' choke chamber79. A portion of the cold air will pass between the upper edge of the damper and the wall 18 and the remaining portion y beneath the damper. By breaking up the cold air current 'in this manner within the chamber 8O it will become more thoroughly mixed with the products of combustion discharging from'. the choke chamber 79. The cold air admitted' to the chamber 80 continues to mix with the products of combustion ywhile passing through the cooling chamber 66 to ing the size of the cold rair passage 83 the velocity of the air will be somewhat increased when entering the chamber 80 whereby a more complete mixing of the ,gas and air will f be afforded. e u

Since the top of the heating chamber 31 is substantially closedexcept-y for a relatively narrow outletk passage at one side thereof, c

extending between the closure 68 andplate 77 and since the chamber 79 serves as a choke passage,r the products of combustionfwill be retained within the chamber 31 fora maximum period and consequently greater eiiiciency is insuredwith a minimum consumpi tion of the fuel.' The cooling vof the products of combustion in the manner described is highly advantageous for the reasons stated. Furthermore the passing of the relatively cold air or Vthat which is at room temperature upwardly through the door'chamber 82 serves the double purpose of cooling the products of ycombustion and ofprotecting the door from the relatively high temperatures in the heating chamber. The choking of the burning` gas within the coils by means of the cone-shaped members 35 is obviously advantaeeous since it'results in forcing the gas into direct Contact with the coils. t will be understood as stated above that when it is desired to use only the fire box 19 as a heating chamber the damper 67 will be closed. However for a more rapid heating of the water both combustion chambers may be used at the same time.

I claim as my invention: Y

l. in a water heating apparatus, the combination ofa heating chamber, fuel burning means at the bottom thereof, water circulating means within said chamber, a cooling chamber above the heating chamber, sepa'- rating between said chambers designed to restrict the flow of the products of combustion to the cooling chamber and means at one side ofthe heating chamber forminfY a vertical passage' for the upward flow or cold air to the cooling chamber.

2. ln a water heating apparatus, the combination of a heating chamber, fuel burning neans at the bottom thereof, water circulating means within said chamber, a cooling chamber above the heating' chamber, separating means between said chambers designed to restrict the flow of the products of combustion tothe cooling chamber, means at one side of the heating chamber forming a passage for the delivery of cold air to the cooling chamber and mea-ns ertending` within said cooling chamber serving to increase the turbulence of the air and gas dischangingA thereto whereby to more intimately mix the same.

3. In a water heating apparatus, the combination of a heating chamber, fuel burning means at the bottom thereof, water circulating meansdisposed within the chamber, a

cooling chamber overlying the heating chamber, means interposed between said chambers affording restricted outlet for the discharge of therproducts of combustion to the coolingk chamber, one of the side walls of the heating chamber being extended above the top of the chamber and. having a iiange-like portion projecting into the cooling chamber, vand a vertically disposed plate spaced from said side wall andv cooperating therewith to form a cold air leading upwardly and discharging into the cooling chamber above said flange-like portion. y y y 4. In a water heating apparatus, the combination Lof a vheating chamber, fuel burning means at the bottom thereof, water circulating means within said chamber, a cooling chamber above the heating chamber, sepameans between said chambers designed tor limit the flow of the products of combustion to the 'cooling chamber, means formingk a Vpassage for the delivery of the cold air to` said cooling chamber, and a second cooling chamber separated from the first by a vertical side wall,said wall having an opening for the passage of the air and gas to the said second cooling chamber.

5. in a water heating apparatus, the combination of a heating chamber, fuel burning means at the bottom thereof, water circu lating means within said chamber, means substantially closing the upper end of said chamber designed to afford a limited outlet for the discharge of the products of combustion therefrom, separate cooling chambers above said heating chamber having a communieating passage therebetween, one of said chambers communicating with the heating chamber, means for opening and closing said passage and means'forming a supply passage for the delivery of cold air to the cooling charnber communicating with the heating chamber.

G. ln water heating apparatus, the combination of a heating' chamber, fuel burning means at the bottom thereof, water circulating means within said chamber, a cooling chamber above said heating chamber, a choke chamber between said cooling and heating chambers for checking the flow of t-he heated gas discharging from the heating chamber and means forming a vertically disposed cold air passage arranged to discharge at its upper end into said cooling chamber.

7. In water heating apparatus, the combination of a heating chamber, fuel burning means at the bottom thereof, water circulating` means within said chamber, a coolingV chamber above said heating chamber, means forming a transversely extending choke chamber between the first mentioned chambers, said choke chamber having an inlet at one end and an outlet at the other discharging into the cooling chamber and means forming a cold air passage leading to the cooling chamber. Y 8. ln a water heating apparatus, the combination of a heating chamber, fuel burning means at the bottom thereof, water circulating means within the chamber, a platevextending across the top of said chamber havinoone edge spaced from one of the side walls or the chamber to form a relatively narrow passage for the escape of the products of combustion, a cooling chamber communicating with said heating chamber through said passage and aplate member spaced from said side wall and cooperating therewith to form a'verticall'y disposed ycold air passage open at its lower end and discharging at its upper end into said cooling chamber to cool the product-s of combustion discharging thereto from the heating chamberQ 9. In a water heating apparatus, the combination yof a heating chamber, Yfuel burning means at thek bottom thereof, water circulating means within said chamber, a cooling lil() chamber above said heating chamber, a wall interposed between said chambers having a restricted outlet for the escape of the gas to the coolingy chamber, a vertically disposed plate spaced from one of the side walls of the heating chamber to form a cold air passage communicating at its upper end with the lower portion of said cooling chamber, said cooling chamber having an outlet at one side thereof and a plate extending longitudinally within said cooling chamber between the top and bottom thereof and in spaced relation to the side walls of the chamber and serving to direct a portion of the intlowing air to the uppei part of said chamber. y

10. In a water heating apparatus, the combination of a cooling chamber, a heating chamber below the cooling chamber separated from the latter by a wall constructed to aord a relatively narrow outlet adjacent one of the side walls of the heating chamber for the escape of the products of combustion to the cooling chamber, water circulating means within the heating chamber, a gas burner at the bottom of the heating chamber, and a dooi at one side of the heating chamber forming a support for said side wall, the latter being spaced from the door and cooperating therewith to form a cold ai'il passage open at its lower end and communicating at its upper end with said cooling chamber.

11. In a water lieatingapparatus, the coinbination of a heating chamber having side and en'd walls, a plurality of water circulating coils within the chamber, plate members on said end walls cooperating with portions there-of to form insulating air spaces and also serving to direct the products of combustion inwardly from the lower endy portions of the heating chamber, a cooling chamber overlying the heating chamber, a wall separating said chambers and having its ends resting on and supported by said plate members, said wall being constructed to limit the low 'of the products of combustion from the heating to the cooling chamber, and a gas burner at the bottom of the heating chamber.

12. In a water heating apparatus, the coinbination of a heating chamber comprising side and end walls, vplate members arranged adj acentsaid end walls to form insulating air spaces for the protection thereof, a door at one side of the heating chamber, a wall overlying said heating chamber and supported by said plate members, said wall aifording a relatively narrow outlet for the escape of the products of combustion from sai-d chamber and being removable through the door opening, a cooling chamber above the heating chamber communicating with said outlet, a gas burner at the bottom of said f heating chamber, and water circulating means within the heating chamber.

13. In a water heating apparatus, the com bination of a heating chamber comprising sidewallsand an upper closing wall con`- structed to afforda relatively narrow passage adjacent one'of the side walls for the' escape of the products of combustion, thefopposite side wall comprising a water compartment, water circulating coilswithin said chamber directly belowsaid upper wall, said coils beingin communication'with Jsaid water coinpartment,a gas burner at the bottom of said chamber, a cooling chamber above said heating chamber, and achoke passage between said chambers having one end communicating with said relatively narrow passage and the other end provided with'an outlet passage discharging to the cooling chamber. i

14. In a water heating apparatus, the coin- Ybination of a heatingchamber having a relatively narrow outlet in its top wall adjacent one of its side walls, its opposite sidewall comprising awater circulating compartment, a plurality of vertically disposedwater circulating coils within said chamber having their end portions connected with said compartment, a coneeshaped member extending vertically within each coil with its smaller end adjacent the bottom of the coil, a gas burner at the bottom of said heating chamber, a cooling chamber above said heating chamber and a plate member projecting inwardly from the side wall opposite said compartinent at a point directly above said outlet whereby to deflect the products of combustion passing from the heating to the cooling chamber.

15. In a combined coal and gas water heater, the combination with a water compartment forming one wall of a ire boX, a gas heated chamber located adjacent the lire box, a plurality of water circulating coils within the gas heated chamber communicating with j said water compartment, of a cooling chamber above the heating chamber separated therefrom by a wall affording a restricted passage for the products of combustion to the cooling chamber and a door spaced from one of the side walls of the heatingy chamber arranged to support the latter and cooperating therewith to form a vertically disposed cold air passage open at its lower end and communicating at its upper end with said cooling chamber. f

16. In a combined coal and gas water heater, the combination with a water compartment forming one wall of a fire box, agas heated chamber located adjacent the iire box, a plurality of watercirculating coilswithin the gas heated chamber communicating with` said water compartment, of a cooling chamber above the heating ychambery separated therefrom by a wall affording a. restricted pas-r sage for the products of combustion to the cooling chamber, a member spacedfroin one of the side walls of the heating chamber forming a vertically disposed cold airr passage open at itsilower end and communicating at n its upper end with said cooling chamber, an adjustable member extending Within the cooling chamber forming means for increasing the turbulence of the air and gas flowing thereto, and a second cooling chamber adjacent one of the side Walls of the rst mentioned cooling chamber, said Wall having,- an opening for the escape of the mixture of air and gas to the second cooling chamber, said 10 adjustable member being movable to closeV said opening When the tire box is used to heat the Water.

17 In apparatus of the class described, a heating chamber, a burner compartmem:V at 1f the bottom of said chamber,l a burner extending longitudinally Within said compartment, a closure for one end of the compartment, a gas supply pipe connected With the burner, and a bottom plate forrthe burner compart- 0 ment having one end supported by said pipe and the other by said closure, the closure and bottom plate being removable as a unit.

MAURUS C. BECK.

flor

Images