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Патент USA US2121108

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June 21, 1938.
v
TUCK
'
v ‘ '
2,121,108
HOT AIR FURNACE
Filed March 5, 1957 '
v2 Sheets-Sheet 1
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‘
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Geo/ye‘
V
INVENTOR.
Tuck
'
BY,
ATTORNEY.
June 21,1938.
,
'G_A_TU¢K
v
-‘ 2,121,108
HOT AIR FURNACE' '
Filed ‘Mar-ch 5, 1957
2 Shéets-Sheet 2
'
-e
'F‘IE_E___.
“
INVENTORI.
George ,4. Tuck
Wm
v ATTORNEY.
5 2.121.108.
I Patented ‘June 21, 1938”
UNITED srAr-Es PATENT oer-‘ice
' 2,121,1“8
no'r ‘AIR FURNACE
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I
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George A. Tuck, San Francisco, Calif.
Application March 5, 1937,’ Serial N0.‘ 129,219
(Cl. 126-99)
4Claims.
This invention relates generally to hot air- fur-'
naces,_such as areadapted for domestic heating
purposes.
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p
‘
.
It is‘ an object of the invention to'provide a
compact furnace of the above character, makingv
5 .
use of a series or group of heat transfer sections,
and having simple means to secure balanced ?ow
of hot products of combustion through the vari
ous sections.
inner and outer sheet metal walls separated by.
suitable heat insulating material If.
, Disposed within the lower portion of the hous
ing and preferably to one side, as shown-1n Fig. 1,
there is a combustion chamber l6. While it‘is 5
apparent that the source of fuel may vary, a
representative burner I ‘l of the gas type has been
illustrated. Above the ‘combustion chamber l6
are the heat transfer sections l8. These sections
may'likewise vary with respect to mechanical 10
detail, but in the design illustrated each consists
capacity for a given area of heat transferring of spaced formed metal side‘ walls Illa, having
surface, which will aii'ordrelatively high. thermal their edges welded or otherwise suitably joined
Another object of the invention is to provide a'
hot air heating furnace capable of relatively high
10
efficiency.
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together as indicated at l9.
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Another object of the invention is to provide
relatively simple and compact heating equipment
incorporating a blower for forced draft operation,
15
In order to eifec- ,
tively increase the heat transfer area, the side 15
walls lBa of the sections can be provided with
corrugations, as indicated at 2|.
’
The interior passages:[ 22 formed by the walls
Further objects of the invention will appear ‘ l8a, are in communication with the combustion
chamber [6. Thus the combustion chamber I6 is 20 '
from the following description in which- the pre
ferred embodiment of the invention has been set 'providedwith a vertical extension Ilia which
connects with the lower'corresponding edges of
forth in detail in conjunction with the accom
- and also an air ?lter.
2
'
a
panying drawings.
the heat transfer sections Hi. This communica
‘
tion can best be understood by reference to Fig.
4, from which it will be evident; that openings 23 25
illustrating a furnace incorporating the present and the lower edges of the heat transfer sections
are in free communication with the interior of
invention.
.
‘Fig. 2 is a cross sectional detail taken along the combustion chamber it, while at the same time
a weld connection.“ or like form of junction
line 2-2 of Fig. 1.
between the side walls of the sections, establishes .30
‘ Fig. v3 is a cross sectional detail taken along the
a seal with respect to the spaces surrounding the
line 3-3 of Fig. 1.
_
Fig. 4 is a cross sectional detail taken along the sections and the combustion chamber. It will be
Referring to the drawings:
Fig. 1 is a side elevational view, in cross section,
‘
.
line ill-4 of Fig. 3.
evident that with a suitable rigid connection be
‘
Fig. 5 is a side elevational view in cross section, ‘ tween the walls of the combustion chamber and
35 showing a modi?ed furnace construction ‘incor
porating
Fig. 6 isthe
a. cross
present
sectional
invention.
view,
the walls of the heat transfer sections l8, these 35
portions will become one rigid unit, which can be
taken along the‘ supported within the housing ill by suitable
means, such as the uprights 26 and 21.
In many instances it is desirable to establish a
‘My furnace is of the type
?ue connection to- the back side of the furnace 40
40 plurality of heat transfer sections‘ formed of housing, leaving the other two sides of the hous
metal walls, and through which hot products of ing substantially unobstructed. Thus in the pres
. combustion are caused to flow from a suitable ent instance a ?ue pipe ‘29 is shown connecting
combustion chamber. Communication between ’ through the back wall 3| of the housing. Com
the various heat'transfer sections and the flue is - munlcation between such flue pipe, and the in- 45
he. U! established through novel means, which insures
teriors of each of the heat transfer sections l8,
a proper balanced or controlled flow of products , is established as fol1ows:-- The adjacent side
‘line 6-—6 of Fig. 5'._
.
making use of a I
’.
of combustion.
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.
The furnace as illustrated in the drawings con-,
0 sists of a housing or_ casing ill, which is provided
' with a cold air inlet II, and one or more hot air
outlets l2.
In this instance such openings are
walls of each of the sections are provided with
aligned openings, which are coupled together by
the aligned short pipe sections 32. These open- 50
ings should be located with due regard to the‘
points of communicationybetween the'interiors of
the sections and the combustion chamber. Thus
in the arrangement shown in the drawings, the
tional construction, consisting for example of‘ vpipe sections 32 are located near one lower corner \65
shown extending through ‘the housing top‘ H.
The housing itself can be of more or less conven
’.
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2
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2,121,108
of the pipe sections while the parts in communis sections disposediin spaced side-by-side rela
cation between the heat transfer sections and ‘tionship within said housing, each of said sec
the combustion chamber are o?set towards the
tions being formed of spaced metal side walls
other lower corners of the sections. While this
arrangement is to be preferred, it is evident that
different locations might be utilized, as .for ex
ample, the pipe sections might be located near
the upper left hand corners of the heat transfer
sections, as viewed in Fig. 1. Telescopically ?tted
10 within the pipe sections 32, there is a pipe 33,,
defining an inner space for ?ow of hot'gaseous
‘products of combustion, means forming com
municating connections between corresponding
edges of said sections and said combustion
chamber, the adjacent side walls of said sections
being provided with aligned openings, aligned
pipe sections serving to couple together the open 10
which is provided with a properly ‘dimensioned ings of adjacent sections, a ?ue pipe connection
longitudinal slot 34. As will be evident from both to one end section of the series, and a single
Figs. 2 and 3, slot 34 establishes communication slotted member disposed within said pipe sec
between the interior of pipe 33, and the interiors
tions, said member affording ?ow restricting
15 of all of the heat transfer sections l8. Pipe 33 is
communication between said '?ue pipe and each
removable, to enable its replacement with a pipe
of said heat transfer sections. ‘
having a differently dimensioned slot 34, or to _
2. In a hot air heating furnace, a housing
having a cold air inlet and a hot air outlet, a
enable replacement in the event of damage due
to excessive heating.
20
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combustion chamber formed of metal walls and
To complete the furnace ‘illustrated, the in vdisposed within the housing, a series of heat 20
terior of'the housing i0 is shown provided withv transfer sections disposed in spaced side-by-side
a partition 36, which divides the interior of the‘ relationship within said housing, each of said
housing into two portions A and B.~ I It is portion
B which is occupied by the heat transfer sections
25 l8, and the combustion chamber It. The lower
part of portion A is occupied by a suitable blower
31, the inlet of which communicates with the
space formed by portion A, and the outlet of
which communicates with the lower part of por/
30 tion B. Above the blower 31 there is a suitable
air ?lter unit 38, which can be disposed in an
inclined position in order to conserve space.
I
Operation of the furnace described will be ap
parent from the foregoing. Blower 3'! draws
cold air into the housing from the inlet ll,
through the ?lter unit 38, to be discharged into
the lower part of the housing portion 13., This air
' is heated inpassing upwardly around the com
bustion' chamber l6, and is further heated by
passing around and‘ between the heat transfer
sections i8. -Hot products of combustion from
the combustion chamber l6 ?ow upwardly into
.the interiors oi'the heat transfer sections l8,
and ultimately ?ow through the slot 34 in pipe
33, to be?nally delivered to the ?ue 29. Irre
spective of‘ the rate of flow of products of’ com
bustion, equalized and .controlled flow can be
maintained through the various sections, due to
the action of .the restricted slot 34.
" ' It will be evident that various structural de
sections being formed of spaced side walls de- '
?ning an inner space for ?ow of hot gaseous‘
products of combustion. means forming com 26 I.
municating connections between corresponding
edges of said sections and said combustion
chamb r, the sidewalls of each of said sections
being , rovided with alignedopenings, aligned‘
pipe sections serving to couple together the 30
openings of adjacent sections, a ?ue pipe connec
tion to the opening of one endv section of the
series, and a single slotted member disposed
within said pipe sections, said member affording
?ow restricting communication between: :said 35
?ue pipe and each of said heati transfer sections.
' 3. In a hot air heating furnace, a'housing hav
ing a cold air inlet and a hot air outlet, 9. com- _' I
bustion chamber formed of metal walls and dis;
posed within the. housing, a series of heat trans 40
fer. sections ' disposed in spaced side-by-side
relationship within said housing, each of said
sections being formed of spaced side walls de?n
ing‘ an inner space for ?ow of hot gaseous ‘prod
ucts of combustion, means forming communicat
ing, connections between corresponding edges of
said sections and said combustion chamber, the
side walls of each of said sections being provided
with aligned openings, aligned‘ pipe sections serv
ting to couple‘together the openings of adjacent
sections, a ?ue pipe connection to the ‘opening
tails can be' altered within the scope of the in
Q‘ vention; Thus in ,the modification of Figs. 5 and of one end section of the series, and a single
6 the invention is embodied in a compact appa 1 member disposed within said pipe sections, said
ratus of the “unit heater" type.L The housing 4| membena?ording ?ow restricting communica
of this heater or furnace has a cold air inlet 42 tion between saidv ?ue pipe and .each of said heat
and ‘a hot air outlet 43. The heat; transfer sec-_ transfer sections and mearns for controlling ?ow
tions or “elements l8 are‘ mounted. within this of hot products of combustionfrom each of said
housing, between ‘the inlet and outletVopenings. heat transfer sections to said ?ue pipe, said
and are connected to the combustion chamber means comprising a pipe telescopically ?tted
IS in the same manner as described for the within said pipe ‘sections, said pipe being pro
furnace of Figs.‘ 1 to 4 inclusive. A blower or fan. . vided with a longitudinal slot serving to establish
44 forces xa draft of’ air’ through the housing and.
1 between the sections l8. Connection to the ?ue
pipe 29, in order to secure an even pull ,upon
each of the sections or elements i3, is substan
communication between said‘ ?ue, pipe and the
interiors of all ‘of said sections.
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4. In a ‘hot air furnace, a housing having a
cold air inlet and ahot air outlet, a'combustion
‘tially the samev as. shown in Figs. 1 to‘ 4 inclusive, chamber formed‘v of metal walls and ‘disposed
Thus the sections l8‘ are connected by the pipe ' within the lower portion of the housingka series
sections 32, and the slotted pipe 33 controls ?ow of relatively flat heat transfer sections disposed
of products of combustion from each of the heat. in spaced upright side-by-side relationship, each
70 transfer elements to the ?ue.
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v.
of ' said sections being formed" of, substantially 70'
I claim:
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parallel spaced side walls defining an inner space
'_ Y 1. In a hot air heating furnace, a housing hav-' .for ?ow of hot gaseous products .of vcombustion,
ing a cold air inlet and a hot air outlet, a‘ combus
nieans serving to establish communication be
" tion chamber formed of metal walls and disposed tween corresponding loweredges of said sections
15
within the housing, a series of, heat transfer
and said combustioncvhamber, the side walls of 75
v
2,121,108
each of said sections being provided with open
3
ing of one end section of~the series, and a pipe
ings near the upper edges of the same, said
telescopically ?tted within said pipe sections and,
openings being aligned withqrespect to a.‘ sub
stantially horizontal axis, relatively short pipe
sections serving to couple together the openings
of adjacent ‘sections, a ?ue pipe extending in a
horizontal direction and connecting to the open
serving to establish restricted communication be
tween the inner spaces of each of said sections
and said ?ue pipe. GEORGE A. TUCK. ~
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