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Патент USA US2407828

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Sept. 17, 1946.
G. R. GOLDSMITH’
2,407,827 ‘
REFRIGERANT EVAPORATOR
Filed March 1, 1944
'
2 Sheets~Sheet .1
.SePt‘ ‘17, W46
. ca. R. GOLDSMITH‘
2,407Q827
REFRIGERANT EVAPORATOR
Filed March 1, 1944
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62:‘.
2 Sheets-Sheet 2
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Patented Sept. 17, 1946
2,407,827
UNITED‘ STATES PATENT OFFICE
2,407,827
REFRIGERANT EVAPORATOR
George Raymond Goldsmith, Girraween Grove,
Ashgrove, Brisbane, Queensland, Australia
Application March 1, 1944, Serial No. 524,604
In Australia May 13, 1943
6 Claims.
1
(C1. 62-126)
2
This invention relates to refrigerators of the
absorption type, and more particularly to small
frontand .top ?anges la and lb. 2 denotes the
half-sleeves provided with flanges 3 by which
the said half-sleeves 2 are spot-welded, soldered,
low temperature chambers within the main re
frigerators, said small chambers being used prin
cipally for the making ofice-blocks and such like
purposes where the descent in temperature
should be as rapid as possible, and the tempera
ture is normally considerably lower than that of
the refrigerator proper. Such low temperature
chambers have been a feature of refrigerators 10.
for many years and the difference in conductivity
of metals has been the’ means whereby these
sweated or riveted to the sides I.
The evapo
rator pipe is designated by reference character 4.
Longitudinal channelled ?ns 5 are formed upon
half-sleeves 2.
In Figure 6 the half-sleeves 2,
?anges 3 and ?ns 5 are an integral casting or
extrusion, whereas in Figure 7 the same parts are
formed by pressing sheet metal. ‘Reference nu
meral 6 denotes a shelf (see Figures 10, l1 and
12) which is rectangular with its end 6a bent up
small chambers have been rapidly lowered in
at right angles, and provided with slots 6b and
temperature and maintained at low temperature
with chamfered corners 6c. Liners ‘1 (‘see Fig
while the refrigerator proper has beennormally 115 ures 8 and 9) are also provided. 8 denotes the
maintained at a higher temperature sufficient for
front cover plates (see Figures 13 and 14). A
the storage of foodstuffs and the like. Usually an
top plate 9 is provided with turned side edge 9a
iron evaporating pipe enclosed in a box is pro
adapted to snugly enclose the ?anges lb of sides i.
vided with a door and made up of metal having
A door It] is mounted on the face plate Ilia. ll
a higher heat conductive capacity, the shelving 20 denotes the ammonia pipe, and I2 the gas heat
within the box being also of a metal having a
exchanger.
higher conductive capacity, such as copper or
According to the invention the evaporator pipe
‘aluminium. The ice trays are placed upon the
4 is made up of a series of parallel U-shaped
shelves within the said box.
sections or turns lying one above the other con
.The object of this invention is to provide means
nected by curved junctions at their ends, except
whereby a low temperature chamber may be
one upper and one lower end which ends are
manufactured with a minimum number of stand
connected to the ammonia pipes. A liquid refrig
ardised sections, which may be rapidly'assembled
erant, for example ammonia, is passed through
and built into the refrigerator proper, providing
the pipe 4 as is usual practice. The junctions
a chamber having the qualities required.
30 are made by curving downwardly an end of each
The nature of the invention will be fully under
section, so that it may be welded or otherwise'se
stood from the following description taken in
cured to the adjacent end of a section immedi
connection with the accompanying drawings
ately beneath it. Obviously the junctions of the
wherein:
sections are alternatively disposed at opposite
Figures 1 and 2 are respectively front and side 35 ends of the section as they descend so that .there
elevations of a low temperature chamber;
will be a continuous passage for the gas, and so
Figures 3, 4 and 5 are detail views of the evapo
that the inlet end of the uppermost section will
rator pipe with parts of the assembly in position; ‘
be slightly higher than its other end, and so that
Figure 6 is an enlarged vertical sectional detail
as the sections descend that end connected to
view of one shelf and associated parts;
40 the curved junction from above will be higher
Figure 7 is an enlarged vertical sectional detail
than its downward curved end to provide a con
‘view of a modi?ed half-sleeve for supporting a
tinuously descending passage to the heat ex
shelf;
changer l2.
.
Figures 8 and 9 are respectively plan and side
The box upon the outside of and enclosing the
elevation of a liner;
45 exaporator pipe it consists of two side plates I
Figures 10, 11 and 12 are respectively plan, front
having inturned ?anges Ic at one end to form a
elevation and side elevation of a shelf;
back, and having outwardly extending ?anges to
. Figures 13 and 14 are front and side elevations
at the front, which sides and back are adapted
of a cover plate.
7
a
.
Figure 15 is a sectional view of a modi?ed con
to lie closely adjacent the outside walls of the
50
pipe sections 4. Flanges lbare also provided on
Referring to the drawings in which like nu
merals denote the same parts in the different
?gures, i denotes the sheet metal sides and back
of an outer casing, said sides being provided with 55
the upper edges of the side plates 1 adapted‘ to
be accommodated in the downwardly and inward
1y turned edges 9a of top 9 and make a tight slid
ing ?t therewith. The two pieces of sheet metal
‘I forming the sides and back of the box are se
struction.
‘
'
M
2,407,827
3
4
2. In a refrigerator of the absorption type hav
cured closely adjacent pipe sections 4 by a series
of half-sleeves 2, amxed by their ?anges 3 to
sides l. These half-sleeves have integral chan
nelled ?ns 5 projecting into the box. The said
?ns 5 of the various half-sleeves are at different
positions upon the sleeves, some being higher
ing an evaporating coil in the form of a plurality
of substantially horizontally disposed U-shaped
turns, said turns being arranged in superimposed
vertically spaced relation with corresponding
portions of the several turns in vertical align
ment,,a..low temperature, cooling chamber con
than others to compensate for the difference in,
level of the twosides of ‘the pipe‘ sections, so that
sisting of thinjrnetal outer'sides and, back posi
tioned about said coil, U-shaped half sleeves sur
rounding opposite legs of the coil turns and se
cured to said sides, ?ns on said sleeves extending
inwardly between the opposite legs of the coil
turns, and shelves slidably ‘mounted upon said
when shelves 6 are mounted with their opposite
edges in channels formed in ?ns 5 they will be
horizontal. These shelves have Vertical rear por
tions 6a recessed at 62'), and chamfered at 60, the. ..
recesses 6b being to avoid the ?ns 5 on which the
. shelf is carried andthe chamfers 60 to avoid the
3. In a refrigerator of the absorption type hav
half-sleeves 2 carrying the next highest shelf '
while being moved rearwardly in the channels. . .. ing an evaporating coil in the form of a plural
?ns.
Each upturned portion to forms a part of-Eth‘el
inner rear wall of the box. Sheet metal liners .1
'
'
'
‘
’
,
~ity "of substantially horizontally disposed U
shapedturns, said turns being arranged in super
(see Figures 8 and 9) aremoved rearwardly until ' “ posed vertically spaced relation with correspond
ing portions of the several turns in vertical align
ment, a low temperature coolingchamber con
sisting of thin metal outer sides and back posi»
their rear ends are between the side edges of the
upturned ends 6a of‘ shelves 6 and half-sleeves 2
and form the sides of compartments between the
tionedabout said coil, U-shaped half sleevessur;
shelves ii. When the shelves '5 and liners ‘l have
rounding opposite legs of’ the coil turnsandse
been located, right angled cover plates 3 are
mounted over the forward ends of‘the liners 7 25 cured to said sides, channeled ?ns on said sleeves
extending inwardly between the opposite legs of
and secured by studs 8a to the ?anges Id of the
sides I (see Figure 3). A ?anged face plate led
to which door It is also’ hinged is secured by
the coil turns, and shelves slidably mounted in
said
channels.
7
'
~
'
7
4; In a refrigerator of the absorption-type hav
as shown in Figures 1 and 2. - A modi?ed‘ form of 30 ing an evaporating coil'in the’ form ofv a plurality
studs 8a around the open framework 'of the box'
of substantially horizontally disposed Ugshaped'
half-sleeve formed‘ of sheet‘metal’is shown in
turns, said turns being arranged in :superim;
posed vertically spaced relation with correspond-'
ing portions of the several turnsin vertical align
Fig. 15, partssimilar to the parts of half-sleeve
2,jbeing designated by the same reference nu
merals with subscripts.
_
’
In a further modi?cation shown in Fig. 15, the
?ns 5a of half-sleeve 2a may be thin and unchan-
351 ment, a low temperature cooling chamber con
sisting of thin metal outer sides and back posiw
tioned ‘about said coil,~ U-shaped- ‘half sleeves‘
nelled in which case the shelves 6d could be proe
vided with a channelled edge Eb-to enable them
to‘ slide‘ along ?ns 5; In lieu‘ of the separate
surrounding opposite legs of the coil turns and
secured to saidsides, said sleeves having chan
liners l upturned side edges of the shelves 6 40? nels formed therein and disposed on the inner
sides of opposite legs of the coil turns, and shelves
could be adapted to form the sides of the inner
slidably mounted in said channels. ~
>
wallof the chambers. Furthermore the half
5. In a vrefrigerator of the absorption type hav-v
sleeves'2 could be ?nless and provided with a
ing an evaporating coil in the form of a plurality
longitudinal channel‘ along which the edges of
the shelves 6 could slide and be held. ‘
Iclaim:
<
-
1. In a refrigerator of the absorption type,‘
having an evapo-ratingcoil in the form of a plu
45;
of substantially horizontally- disposed U-shaped
turns, said turnsbeing arranged in superimposed
vertically’ spaced relation with corresponding
portions of the several ‘turns in vertical align
rality of substantially ‘horizontally disposed U
shaped turns, said turns being arranged in super
_ment, ‘a low temperature cooling chamber cone
imposed vertically ' spaced relation with corre
tioned about said coil, ‘ U-shaped halt'sleeves
sponding- portions of the several turns-in vertiw
cal alignment, a low temperature cooling cham~
ber consisting of thin metal outer sides having»
front ?anges and back held to the turns of the
surrounding opposite legs of the coil turn‘s'and
evaporator coil by flanged half-sleeves passing
around said turns; longitudinal channelled ?ns
upon said half-sleeves; shelves with upturned
rear ends for forming sections of the rear inner
wall, the side edges of said shelves being slidable
in the channels of the ?ns, and provided with
chamfers and slots for avoidance of obstacles;
liners for location between the upturned ends of
sisting of thin metal outer sides and'back posi~~
secured'to said sides, ?ns on said sleeves extend
ing inwardly between the opposite legs of the
Z coil turns, and shelves slida-bly mo-unted'upo'risaid
?ns and having channels to receive said ?ns. 6. In a refrigerator of thev'abso-rptiontype-hav
ing an evaporating coil in the form of -{a plurality -
of substantially horizontally disposed uishaped
turns, said turns being arranged in superimposed
verticallyspaced relation with- corresponding
portions of the several turn-s in vertical align-"
ment, a low temperature cooling chamber con-
withinturned side edges for sliding along the‘
?anges ontheltops of said'sides; a-face plate
sisting of thin metal outer sides and back posi
tioned about said coil, U-shaped half sleeves‘
surrounding opposite legs of the coil turns‘ and
secured to said sides, ?ns on said sleeves eXtend-=
ing inwardly between the opposite legs of the coil
turns, and shelves slidably mountedl-up'oni said
secured upon said cover plates, and a‘ door
l?ns and having
GEORGE
upturned
RAYMOND
‘rear-portions’;
GOLDSMITH.“ 91
said shelves and the’ half-sleeves on the one hand,
and behind right angled cover plates secured to
the front ?anges on the outer sides on the other
hand; ?anges on the tops of "said sides, a top
hinged to said face plate. -
-'
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