US2399318A

US2399318A - Fluid heater

Info

Publication number: US2399318A
Application number: US601489A
Authority: US
Inventors: Joseph W Bouldin
Original assignee: Individual
Current assignee: Individual
Priority date: 1945-06-25
Filing date: 1945-06-25
Publication date: 1946-04-30
Anticipated expiration: 1963-04-30

Description

rlol .3Q 194%. y y W, BQULDlN zgg 'FLUID HEATER f Filed June 25, 1945 2 Sheets-Sheet l P4 zz I I C mmm l JOS EPH w OULDJN,

AT TORNEY April 30, 1946. J. w. BOULDIN FLUID HEATER 2 Sheets-Sheet 2 Filed June 25, 1945 JOE'PH W BOULBIZV,

/NVENTOR ATTORNEY Patented Apr. 30, 1946 UNITED lSTATES PAT-ENT Y101"' -FlfCfE FLUID-.HEATER floseph'WLBoldin, Los Angeles,'Ca'li`f.

Applicatonlune 2-5, 1945, -SerialfNogsrUl-ASSi commis. v(orizz- 117) l The `invention relates to va iluid heater and more particularly toa water heater.

Anobject of the invention is to provide a iluid heater which is' simple in construction'andwhich makes eiicient use of the source of heating such as a'gas iiame. This is accomplishedbyemploying a iire .tube type 'of heating unit "arranged na'vertical Yposition andnprovided with an outer casing to provide a"uespace around "the heating'unit. Preferably the heating unit is ,provided `with `a bulging top :wall and ,a bulging bottom wall which "contributeto 'efficient-'heating in the followingway.

The bulgingbottomziwalliprovidesian extended surface against vvhicn'thev flame of .the burner is directed'andas thissurface increases in radius in an upward direction it guides that .part of. the heated gas which does `notrliow throughthe fire tube, tov the sidewall ofv the heating unit. The bulging'topwall'also isan extended surface which is utilized'for'further heating the fluid, through the use of "acooperatlng cast iron orrthick metal cap spaced therefrom "and cooperating therewith to provide a fluejspace at thetop of ,the vheating unit. As kthe heavy 'metal cap forms one wall of the upper portion of theV flue which. is heated by the gases Ifrom .the burner, it vthereby 'becomes heatedandh'eatsthe extended top wall of the heating unit byconvection. It alsodirectsorrelects the 'hotfgases'tm' the' top wall. A suitable heat 'insulating jacket is provided .around the heating unit.

In the preferred' lform. 'of' the .inventionthe side wall 'aswellas 'the -top. and bottom .of '.theheating unit lare provided 'with `a spaced .cast firon or other heavy metal outer iiue member .in heat exchange. and re'iecting relation tothe side wall and both end walls of theheating unit.

A further objectof thefinvention is `toemploy a re tube type of heating .unit in .avertical .position whereby itdirects the. heated-gases from Athe burner upwardlyto a viiue,with the provision of bulgingtop and bottomwal-lson-the heating unit whereby the. heated gases l`from the burnerfheat notonly thefxre tubes 4but also the side wall and i both end walls with' the ame directly' heating the bottom wall, and with the further provision of a heat radiating jacket forming an outer ue member in heat exchange relation to some part or al1 of the heating unit.

For further details of the invention reference may be made to the drawings wherein Fig. 1 is a vertical sectional view of a uid heater according to the present invention.

Fig. 2 isl asimilarfview o'f-a preferredv form-of the invention.

Referring in detail to the drawings; the yi-iiuid heater I of rvthisfinvention -comprises'a="heating unit 2 having-a c5'Iliifid'ricalside wallland bulging top yandbo'ttom lwalls vland5,fhere-'illustrated las ldome shaped iand conical respectively. `'I'heaiiis of the vhcat-ingunit Tis-vertical `and enclosed by the side 'wa-ll? 3'fis a: plurality =of verticalifre tubes such Afas-indicated at 6 which Lopen"'atthei-r'outer ends in an intermediate: portion o'f 'the'erfd'l walls 4 and as indicated at1fan'd 8. uiBelowfthebottom wall 5 is :arrangedfa gas burner-#9 `preferably having' -j ets arranged on -aplural-ity `of steps I0, 4H yand I 2 Awhich lie on a conical'surfaceparallel-'tothe `theheating lunitf2.

"The"burner"f9is' Yheld ini position by abilbraclretv 2 2 secured vby 'af-stove'fbolt'f23 ito' theginsidecfzca's'ing I 3 fand' by V"the gas-supply Apipe `24 `which itpasses through the casings" I3'and- I4.

'Extending parallel to-andispacdfromtheitop wallf4 is yfeast 4iron-cap y25 havingavertical flue 26 which 'passes v'throughxa central opening 21 -in Aa cover 28"securedby bolts 29 :tothe top of casings I3 and-I4. Cap25' is;1secured'-"to casing |13 byibolts 12.

"Thezh'ot water or 'other u'd is vrstored "in a 'tank 30 having #a cold water connection '3 I to fthe' `bottom .ofthe heatingunit 2 Yas 4indicated at 32. Tank-'30 "hasa 4hoi: water-connection`33 'connected to 'thei'center yof the 'top Awall 4 tas" indicated .at 34, the .connection33passing'througlrandbeing. sup- Ported :by-casings' I3 -and' 1*'4 and'fue 26 as" indicated at 35 and 3B respectively. The side wall 3 is further supported by the clean out connection 31 which passes through and is supported by casings I3 and I4 as indicated at 38 and by a connection 39 which similarly passes through and is supported by casings I3 and I4 as indicated at 4U.

A thermometer not shown may be used with connection 39 to determine when the scale in the unit 2 needs to be removed by passing a suitable therefrom to the top Wall 4, and cap 25 reliects orv directs the hot gases onto the top Wall 4.

The preferred form of the invention is shown in Fig. 2 wherein the fluid heater 42 comprises a heating unit 43 which is upside downfrom that shown in Fig. 1, whereby the bottomwall. 44 .is dome shaped and the top wall 45 is conical. A burner 46 is arranged beneath the bottom wall 44 Vand is provided with pairsmof jetssuch as441 and 48 which are directed towards-eachother, the resulting flame impinging directly one-,the bottom wall44. j All of the Vjets, suchas,v 41 and 4S are onl thesame'ilevel.A Aroundthe heating unit 434and extending from the top ofthe side wall449 tothe ring base B is a cylindrical cast iron -J'acket 5I which serves ,as'anouterue member' @absorb` heat and radiate it to the side wall 49and the bottom44 of the heating unit and director reflect thehot -gasesagainst the heating unit.L The jacket 5 has,A an vinturned flange 52 secured-to thering 5|).,by bolts53. Inside ofthe jacket 5| is arranged a number of brackets such as .54 secured to thejacket 5| by bolts 5s.k The brackets like 54 support-the outer edge ofthe bottom wall 44A. Resting on the jacket 5| is a cast iron-cap`56 secured thereto by bolts 51. ACap 56 extends parallel to and spaced from the conical top 45 to provide another portion of a flue, for the heated gases from burner 45. Cap 56 functions lk'e'fcap 25 in Fig. 1 Cap 56 has a central vertical ilue 58 which passes through an opening 59 in a'cover |50.I Cover 60 rests on a sheet metal.

casing 6| which is cylindrical and vlarger than the jacket 5|, .the intervening space between cas ing- 6| withits cover 60 and jacket 5| with its cap. 56 being filled'with apacking -of insulating material 62. Cover`6|l is secured to the top ,of casing 6| by bolts 63 and thebottom of casing 6| is securedtof a flange .-64 arising from base 59, by lciclts 65; -Thef cold connection 66 is piped into the bottom' ofthe side wall- 49 and the hot connection 61 is takenfrom the truncated top 68 oftlietop vi'allllli.-l "The hot water isconcentrated at-the hotconnection 61 by reason of the fact tliatfthe top wall 45.. tapers in to the hot connection 61,v also the surface of the conical top 45 and the cap 56`Lare. more extended than'if the heating unit were inverted as in 1. Also the cylindrical jacket 5| 'increases the thermal eiciency through'absorblng heat fromthe hotegases and radiatingitto the heating unit, and directing or reflecting the hot gases on ,the heating punit, Also'the'jacket 5|fin combination with the pipe connections `66`,`.69 `and .16 and 61 assist the brackets 54 in supporting the heating unit 43 in a vertical position concentric with the jacket 5|. As previously described, ring base 50 has an opening 1| through which the unit 43 may be inserted after the jacket 5I and casing 6| are bolted to the base 5|), although the unit 43 may be assembled in position shown by inserting it in the top of jacket 5| and casing 6l if desired.

It will be apparent that various modifications may be made in the invention without departing from the spirit of the following claims; y

I claim':

l. A fluid heater comprising a vertical heating I' unit having a cylindrical side wall and bulging topl and bottom walls, vertical flue pipes sur- .,rounded by said side wall and opening through an Aintermediate portion of said top and bottom Walls, va burner disposedbeneath said bottom wall and adapted to direct flames on said bottom wall, a casing around and spaced from said side wall Vvand providing a iiue space foi-,said burner along said side wallQa'thickfmetal Ycap for said casing, said cap extending substantially parallel to and spaced from said bulging topY wall to form a consaid top wall is conical and said bottom wallie dome shaped, said casing' comprising aninner casing of thick metal, a sheet metal outer casing, a packing ofinsulatingv material between said outer casing and said inner casing and cap, a base ring supporting said inner and outer casings, said ring having a central opening larger than the periphery of the side wall of said unit, and brackets secured inside said inner casing and supporting said heating unit above said burner and above said base ring. '5. A fluid heater. comprising vertical heating unit having a sidewall and bulging top and' bottom walls,'vertical uepipe's surrounded by said side wall and opening through an intermediate portion of said top and bottom walls, means providing a flue space around said side walland over said top wall, a burner beneath saidV bottom wall in heating relation to said' bottom walhsaid iiue pipes, said side Wall andsaid top ,wallga cold uid inlet adjacent the vbottom of said unit,l and a heated fluid inlet at the top. of s'aidtop' wall; 6; A fluid heateraccording'tc claim 5'` wherein said means*A comprises a cast iron cylindrical inner casing and a cast iron-cap therefor having'aiflue, an outer sheet'metal casing, a cover for said sheet metal casing having-a` central opening for said cap ue, and a packing of insulatingmaterial between said outercasing with its said cover, and-said-inner casing withits said cap. f l f JOSEPH? W. BOULDIN.