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Патент USA US2112655

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March 29, 1938.
2,112,655
c. H. MoRRow
WATER HEATER
' Filed April 9, 195e
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INVENTOR
CLARENCE - H. MORROW
FIG."2
BY
2,112,655
Patented Mar. 29, 1938 -
UNITED STATES PATENT OFFICE
2,112,855
WATER HEATER
Clarence H. Morrow, Shaker Heights, Ohio, as
signor to The Hotstream Heater Company,
Cleveland, 0hio, a corporation of Ohio
Application April 9, 1936, Serial No. 73,510
6 Claims. (Cl. 122-494)
This invention relates to improvements in wa
ter heaters and particularly to certain features
of an enclosing cabinet structure combinedwith
the heater combustion system.
«
Water heaters of the type including a water
5 reservoir and a heating unit therebeneath when
designed to reduce the overall height thereof,
position the heating unit below the reservoir and
relatively close to the surface upon which the
heater is supported.
'I'hese heaters are some
10 times placed upon wooden floors and, to insure
against fire hazard, building codes specify that
the temperature of the floor below such burners
shall not exceed a certain upper limit. My in
vention provides novel means for insuring against
l Ul the overheating of the surface upon which the
water heater rests.
When control equipment for heaters using
gaseous or volatile fuel is housed within a cabinet
there is an explosion hazard in case fuel should
leak into unventilated pockets in the cabinet.
My invention provides novel means for ventilat
ing the portion of the cabinet housing thefuel
supply and control equipment.
The novel structural features by which I carry
' out my invention will be more 'clearly understood
from the accompanying drawing and specifica
tion and the essential features thereof will be
set forth in the claims.
I In the drawing, Fig. 1 is-a sectional elevation of
a’water heating device embodying my invention;
and-Figs. 2, 3 and 4 are sectional views along
similarly mounted lines of Fig. 1.
y
I have illustrated my inventionas applied to
that type of water heater which utilizes gas or
IJ CA
similar fuel for the heating of the water, but
it- will be understood that a similar structure
within the scope of the appended claims may be
utilized with an electric or other heating unit.
In the form shown, a water reservoir III is
40
burner I1 in a well known manner and the supply
of fuel is in accordance with the demand for hot
water removed from the reservoir. 'I'he products
of combustion from burner- I1 pass upwardly
through a flue 20 which is supplied with suitable 5.
damper means. as is usual.
The generally vertical transverse partition I5
and the generally vertical cylindrical reservoir
partition 22, together with the generally hori
zontal partition I3a_ and the generally vertical 10
side walls of the cabinet I3 and the lower head
of the reservoir I0, form an upper chamber com- -
partment substantially enclosing the burner I'I.
Generally vertical walls I3b, here shown as in
tegral with the generally horizontal partition
I3a, extend below the cabinet proper on all sides
thereof and form a base which holds the cabinet.
and the parts therein, slightly above the ñoor
or other surface 23 upon which rests the present
water heater, said walls I3b being provided with
inwardly extending bottom ñanges I3c, as shown.
A lower chamber compartment 24 is therefore
formed within the base and below the generally
horizontal partition I3a thereof, as will be readily
understood. One or more openings 25, three be
ing here shown, are provided in the front end 25
portion of the partition I3a, and the upper cham
ber compartment is provided with suitable open
ings 26 and 21, in the partitions I5 and 22, re
spectively, so that communication is provided be
tween the lower chamber compartment and the
upper chamber compartment. For the lower
chamber compartment, suitable air inlet means
remote from the openings 25 is provided, and in
the embodiment here shown, air inlet openings 35
28 are provided in the rear base wall I3b, which
wall is farthest removed from the openings 25,
and other air inlet openings 29 are provided in
the rear end portions of the side base walls I3b.
It is to be understood, however, that any air inlet 40
supplied with the usual water inlet pipe I2 and
openings for the admission of secondary air to
outlet pipe I I. A cabinet I3 surrounds the entire
unit and is provided with a removable front door
I4 and the generally vertical transverse par
points removed from the opening or openings 25,
thev lower chamber compartment, at a point or
are suilicient for the purpose, so long as a suf
fìcient volume of secondary air is forced to flow 45
water reservoir and in which insulating material across the lower surface of the partition I3a for
the protection of the iloor or other surface 23
I6 may be packed if desired. A burner I1 is sup
ported by a bracket I8 secured to a generally upon which rests the present water heater.
With the above described construction, when
horizontal partition ñoor I3a of the cabinet I3
and the burner is supplied with a suitable fuel ` the burner I1 is in operation, the products of 50
Ui O such as gas through ~a_ suitable connection I9.
combustion passing out the iiue 20 cause convec
tion currents in the direction of the arrows,
The usual control members, such as valves, ther
mostats, a pilot and the like, are‘indicated in Fig. 1, so that relatively cools secondary air for
the drawing but need not to be described here. the burner I'I is caused to enter the lower cham
„ tition I5 forming a compartment Iadjacent the
It is suilicient _to say that the gas is supplied to
ber compartment through the inlet openings 28 55
9, 1 13,655
or20orboth,saidsecondaryairpassingtothe partment and remotely located relative to said
left as viewed in Fig. l. beneath the partition Ila,
air passageway, whereby said floor or other sur
then-through vthe openings 2l, 2l and 21 tothe
upper chamber compartment. in which the
burner I1 is located, and thence out through the
face is protected from the heating effects of said
heating unit by said insulating member and by
the air which enters the lower compartment
?ue.- Such a current of cool air passing below
through the air inlet means thereof and which
passes beneath said lpartition to said air pas
tbe partition ita will cool the partition, which
would normally be a metal plate, and thus pro
tect-the floor or other surface 2l from excessive
heat due to the close proximity of burner i1.
As an additional protection to minimize the
men .
heat reaching the ?oor or other surface 23 from
the burner I1, I provide heat insulation II- be
tween the burner i1 and the door or other sur
face 2l. 'I‘his insulating material. if desired, may
2. In a water> heater having a water reservoir 10
and a fuel burner unit-therebeneath and located
a relatively short distance above a floor or other
surface, a casing forming a substantially closed
chamber between said reservoir and said floor or
other surface and enclosing said burner unit, a 15
be incased in a metal housing `32, as here shown.
partition beneath said burner unit and spaced
and securely bolted to the partition Ila by the
above said floor or other surface and dividing s_aid
chamber into an upper burner compartment be
tween said reservoir and said partition and a
lower air compartment between said partition 20
and said floor or other surface, said partition
under said burner unit being uninterrupted, a
flue communicating with said upper compart
ment for the flow therefrom of products of com
bustion, an air passageway through said partition 25
establishing communication between said upper
and lower compartments for the ñow of air from
said lower compartment to said upper compart
members 22.
f
-
,
I find that by utilizing the construction above
described, I can place the water reservoir of the
heater very close to the floor 22, which places the
burner I1 still closer to the floor, but with the
protection here shown and described I am able
to hold the temperature of the floor at a point
25 low enoughto prevent charring or burning of a
combustible floor 23 and well below the temper
atures specified in those building codes with which
I am familiar.
It will be noted that in the front or left por
30 tion of the cabinet i3 as viewed in Fig. 1, a
chamber 2l is formed between the door il and
the transverse partition I6, which chamber 2|
houses the fuel supply and control equipment.
If .the space in this chamber is dead space, any
ment, and air inlet means in said casing and be
low said partition for the lower compartment,
said air inlet means being remotely located rela
tive to said air passageway, whereby air drawn
through said inlet means into said lower com
more openings I0 for the ingress of air into cham
partment ñows beneath said partition, with a
cooling effect thereon, to said air passageway and
thence into said upper compartment.
3.‘In a water heater having awater reservoir
ber 2| may be provided, and by locating the open
and a fuel burner unit therebeneath, a cabinet
ings lli at a point removed from the source of
enclosing said reservoir and said burner unit,
partition means- providing an upper compart 40
ment in which said burner unit is located and a
lower compartment, air inlet means for said lower
compartment and a products of combustion out
let means for said upper compartment, and an
35 leakage of fuel therein may cause a dangerous
condition. To avoid such a contingency, one or
40
sagezvay and thence into said upper compart
suction, namely, from the'opening 28 in the par
tition I5 which leads to the upper chamber com
partment and to the flue 2li, I insure good venti
lation for chamber 2|. By making the air inlet
openings 2l and 29 insufllcient to supply a proper
45 amount of secondary air to the burner I1 and
less than the capacity of nue 20, I insure that
some secondary air will be drawn through open
ings ll. At the same time, the openings il are
small- enough to insure suflicient draft through
50 the air inlet openings 28 and 2l to create the
cooling eßect desired in the lower chamber com
partment for the proper protection of the floor
or other surface 23, all as will be readily under
stood.
'
What I claim is:
l. In a water heater having a water reservoir
and a water heating unit therebeneath and
located a relatively short distance above a floor
or other surface, a casing forming a substantially
60 closed chamber between said reservoir and said
i'ioor or other surface and enclosing said heating
unit, a partition beneath said heating unit and
spaced from said ñoor or other surface and di
viding said chamber into an upper'burner com
55
65 partment between said reservoir and said parti
tion and a lower air compartment between said.
partition and said floor or other surface, a heat
insulating member under said heating unit and
adjacent said partition, a flue communicating
70 with said upper compartment for the now there
from of products of combustion, an air passage
way establishing communication between said
upper and lower compartments for the flowr of air
from the lower compartment to the upper com
75 partment, and air inlet means for said lower com
air passageway establishing communication be
tween said lower and upper compartments for the
flow of air from said lower compartment to said
upper compartment, the air inlet means for said
lower compartment being remotely located rela
tive to said air passageway, the two compart 50
ments being otherwise sufficiently closed so that
a large proportion of the secondary air supplied.
to said burner unit ñows through said lower com
partment and across the lower surface of said
partition means, with the consequent production
of a cooling effect upon said partition means.
4. In a water heater having a water reservoir
and a compartment therebeneath in which is
located a fuel burner, said water heater also hav
ing a flue communicating with said compartment
for the flow therefrom of products of combus- ~
tion, control apparatus for the supply of fuel to
said burner, cabinet means having a chamber for
said control apparatus, there being an air pas
sageway between said chamber and said burner
compartment and there being an air inlet means
in said cabinet means for the flow of air into said
chamber, the air inlet means of said cabinet
means being remotely located relative to said air 70
passageway.
.
'
5. A water heater as in claim 4, characterized
in that partition means is provided which forms
an air compartment beneath said burner, air inlet
means for such air compartment, means estab 75
3
líshing communication between said air compart
ment and said burner compartment, said air in
let means for said air compartment being insum
cient to supply said burner with a proper amount
of secondary air, whereby secondary air for said
burner is also supplied through the air inlet
means of said cabinet means.
tion and a lower air compartment between said
partition and said floor or other surface, a ñue
communicating with said upper compartment for
the flow therefrom of products of combustion, an
air passageway at one side of said casing estab
lishing communication between said upper and
lower compartments for the flow of air from the
cated a relatively'short distance above a ñoor or
lower compartment to the upper compartment,
and an air inlet opening for said lower compart
ment remotely located relative to said air pas 10
other surface, a casing forming a substantially
closed chamber between said reservoir and said
floor or other'surface and enclosing said heating
unit, a heat insulating partition beneath said unit
and spaced from the ñoor or other surface and
protected from the heating eñ'ects of said heat
ing unit by said insulating partition and by the
air flowing beneath said partition from the lower
compartment to the air passageway and thence 15
6. In a water heater having a water reservoir
and a water heating unit therebeneath and lo
sageway, whereby the ñoor or other surface is
dividing said chamber into an upper burner com
into the upper compartment.
partment between said reservoir and said parti
'
'
CLARENCE H. MORROW.
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