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Патент USA US2387657

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I‘ ‘ Oct. '23, 1945, ‘"
“
‘
A; e. GROSS
REFRIGERATION
“ ‘Filed Aug. 2, 1945
Q ' 2,387,657
’
~2'Sheets-Sheet l
Oct. 23,1945.
2,387,657
A. G. GROSS’ '
REFRIGERATION
2 Sheets-Sheet 2
Filed Aug. 2, 1943
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Patentedsoct. 23, 1945
2,387,657
UNITED ‘STATES PATENT OFFICE
2,387,657
Y
‘
REFRIGERATION
Alfred G. (gross, Wilmette, 11]., assignor to The
Hoover Compa
poration of Ohio , North Canton, Ohio, a cor-
“
Application August 2, 1943, Serial No. 498,992
‘19 Claims. (0!. 6H)
‘This invention relates to refrigeration V and
‘inert ‘gas fan, circulates air over the condenser
more particularly to a three-?uid. absorption rel
frigerating apparatus utilizing a single power
means for‘ circulating all the mediums within
the apparatus with a secondary heat transfer
circuit for the transfer of heat from the space
to be cooled to the evaporator of the refrigerat
and. absorber to cool the same.
The energy supplied to the motor and the gas '
supplied to the burner for heating the boiler are
controlled responsive to the temperature of the -
cooling unit or the food storage compartment,
the arrangement being such that the control‘ can
be posttioned in the apparatus compartment Ede
ingrapparatus in which the secondary heat trans
‘ - fer ?uid is also circulated by'the power means
.and in which the secondary heat transfer cir
cuit is in open communication with the absorp
‘ Jacent to the burner for the boiler,
10
Other objects and advantages of this inven
tion refrigerating apparatus but in which the
heat transfer ?uid is prevented from mingling ‘
with the refrigerant or the absorbent of the re-f
frigerating apparatus. The entire apparatus in
cluding the heat transfer circuit is hermetically
sealed and power is transmitted through the
walls of the apparatus by a magnetic transmis
‘ sion.
‘ More specifically, a fan is located in the inert
gas circuit of the refrigerating apparatus to cir
culate the inert gas and is driven by a motor,
‘Y located on the
tion will become apparent when taken in connec
tion with the accompanying drawings, in which:
Figure 1 shows the refrigerating apparatus of
this invention assembled with~a domestic refrig»
erator cabinet partly, broken away to depict the
location of the various parts of the apparatus;
Figure 2 shows the control circuit for the ap
paratus according to this invention: and
, Figuse 3 shows the construction of the power
unit for circulating the mediums and driving the
cooling fan.
Referring to Figure l of the drawings, the ap
exterior of the inert gas circuit,
by means of a magnetic transmission. The inert 1 paratus comprises a boiler-analyzer assembly‘B, a
gas at its raised pressure sweeps‘the liquid re 25 recti?er R, a condenser C, an evaporator 132, an
absorber A, a reservoir 8, and an electric motor
frigerant through the ‘evaporator of the refrig
M for driving a medium circulator fan I‘ and ‘an
erating apparatus and a portion thereof is uti
aircirculating fan It. The aboVeFenumerated
lized to operate a gas lift pump to circulate the
absorption solution between the boiler‘ and the ‘ elements are‘ connected by various conduits to
' absorber. ‘The evaporating refrigerant in 'the 30 form a complete refrigerating system ‘which will
be fore fully described hereinafter.
‘ ‘evaporator
is in’ heat transfer relationship with a
“ The system may‘ be charged with a suitable‘
liquid heat transfer medium which is inert with
refrigerant such‘ as ammonia, a suitable absorp
respect to the refrigerant and the absorption
tion solution or liquid such as water, and. a suit
solution and still another-portion of ‘the inert
gas placed under pressure in the inert gas‘cir 35 able inert gas or pressure equalizing medium such
as hydrogen ‘or nitrogen.
‘ . ‘
cult is utilized to operate a second gas lift pump
The boiler-analyzer assembly 3 comprises a
to lift the cooled liquid medium to a cooling unit
horizontal cylindrical vessel ‘ I i, with a cylindri
located in vthe food storage compartment of a
cal tube for ?ue gases If, both of which are
domestic refrigerator from where this liquid re
turns by gravity again into 'heat exchange with 40 seen extending from the insulation II at the right
hand ‘end of the assembly. At the opposite end
the evaporator of the refrigerating apparatus.
of the assembly is a vertically extending stand
The inert gas utilized to circulate the auxiliary
pipe which constitutes an analyzer, which isnot
heat exchange liquid is separated therefrom in
shown in the drawings, being embedded'in‘ the
the cooling‘ unit and is returned to the suction
.\_
side of the circulating fan of the refrigerating 45 ' insulation i3. _
apparatus.
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‘
' The application of heat tothe boiler-analyzer
The'entire refrigerating apparatus including
assembly liberates ammonia vapor from the
the evaporator is located in the apparatus com
partment of a domestic refrigerator cabinet lieneath the food storage compartment. The air
in and this ammonia vapor rises upwardly
‘ , cooled condenser andabsorber of the refrigerat
ing ‘apparatus are mounted in a vertical'position
adjacent a wall of the apparatus compartment
strong absorption solution which is present there- -
through the standpipe. constituting the analyzer.
in counteriiow with strong absorption solution re
turning‘ to the. boiler analyzer assembly whereby
further refrigerant vapor is liberated by'the heat.
'_ having ‘louvers for the escape of cooling air and ' of'condensation of the absorption solution vapor
a fan, driven by the same motor which drives the 5 which is invariably driven off with the ammonia
2,887,155?
weak absorption solution in the absorber forms a
The ammonia vapor driven off in the boiler
analyzer assembly B, containing some absorption
, strong solution which leaves the bottom‘ tube of
solution vapor, ?ows upwardly through the air
the absorber A by conduit 29 which leads to the
outer passageway‘of the concentric tube heat ex
cooled recti?er R where the heat of condensation
of the absorption solution vapor is_ liberated to
changer 23. The strong absorption solution ?ow
the cooling air ?owing over the recti?er by air
ing through the outer passageway of the concen-’
tric tube heat exchanger 23 takes up heat from
the strong absorption solution from the boiler
cooling ?ns H which are mounted on the exterior
walls of the recti?er R. This causes the absorp
tion solution vapor to condense and the con
densed vapor ?ows backwardly through the recti
?owing through the inner tube of the concentric
10 tube heat exchanger 23 whereby the strong solu
tion is materially heated and flows by the conduit
?er_ tube R into the boiler-analyzer assembly. >
From the recti?er R‘ the dehydrated‘ ammonia
. 30 to the top of the analyzer column where it
flows downwardly therethrough in counterflow to
rising vapors generated in the boiler-analyzer as
positioned adjacent the rear wall of a domestic 15 sembly B. The strong solution is further heated
by the rising vapors and as previously pointed out
refrigerator cabinet which is generally indicated
by the heat of condensation of the absorption so- _
at l5 andhas a food storage compartment l6 and'
vapor enters the top of the condenser C and ?ows
downwardly therethrough. The condenser C is
lution vapor and some refrigerant vapor is driven
therefrom before it comes into direct heat ex
an apparatus compartment I‘! in which the con
denser C is located. The rear wall of the ap
paratus compartment has louvers 18 formed 20 change with the heat being supplied, to the boiler
therein for the exit of cooling air.
>
analyzer assembly B.
'
1
The inert gas which was stripped of the amr
monia vapor in the absorber A is taken therefrom
The heat of condensation of the ammonia va
por ?owing downwardly through the‘ condenser
_C is transferred to the cooling air by means of.
by the suction conduit 3| of the circulating fan
heat exchange ?ns l9 mounted on the exterior 25 F and is placed under a pressure of approximately
of the condenser tube which causes the ammonia
four inches of water. The inert gas placed under
vapor to condense and flow downwardly through
pressure by the circulating fan F ‘leaves the fan
by the discharge conduit 26, ?ows through the
the condenser C due to the fact that the tubes
of the condenser have a continuous downward
outer passageway of the concentric tube gas heat
slope, throughout.
The condensed refrigerant
condensed in the condenser C enters the evapo
30
rator E by conduits 20 and 2|. It is to be noted
that the conduit 20 is in the form of a downward
ly extending loop so as to form a liquid trap be
tween the condenser G and the evaporator E.
The weakened absorption solution formed in
‘the ‘boiler-analyzer assembly B, by theapplica
exchanger 32 and enters the evaporator E by con
duit 2| simultaneously with the liquidrefrigerant
' condensed in the condenser C.
The evaporator E comprises essentially a con
centric tube heat. exchanger although it may take
other forms. . The liquid refrigerant and the inert
gas ?ows through ‘the inner, passageway of the
concentric tube heat exchanger evaporator E
tion of heat, leaves by the conduit 22, enters the
whereby the liquid refrigerant evaporates by dif
ex
fusion into the inert gas to produce a refrigerate
so 40 ing effect. The inner tube of the concentric tube
the
evaporator E is small in diameter and the inert
the
gas placed under pressure by the circulatingv fan
boiler-analyzer assembly B which level is below
F
?ows therethrough at a relatively high‘velocity
the top of the absorber A.
’
so that it propels the liquid refrigerant along
In order to lift the solution from the level exist 45
the inner tube of the concentric tube evaporator
ing in the'solution reservoir S, a gas lift con
'
by the frictional or dragging action of the inert ‘
duit 25 of ‘small diameter is provided leading to
gas ?owing over the surface vof the liquid re
the top coil of the absorber A, as shown at the
frigerant while it is evaporating into the inert gas.
right hand end of Figure 1. The gas lift pump
‘central tube of the concentric tube heat
changer 23 andz?ows by conduit 24 into the
lution reservoir S. The level of liquid in
solution reservoir S is the sameras that in
25 receives pumping gas from the medium cir 50 ‘The outer passage of the concentric t'ube evap
orator E contains a secondary heattransfer liq
» culating fan F by means of the discharge conduit .
uid which is inert to both the ammonia and the
absorption solution and which will not freeze at
any temperature at which the evaporator may op
. level existing in the solution reservoir‘ S. The
solution level in the solution reservoir S maintains 55 erate. This fluid may be a ?uid such as ethyl
26 and the connecting conduit 21 which is con
nected .to the gas lift pipe 25 at a level below the
the proper depth of immersion on the; gas lift, - . amine or it may be a weak solution of ammonia‘
and water, the concentration being such that. the
pump so that gas'entering the conduit 25 through
liquid will not freeze at any temperature to which
the conduit 21 willformalternate slugs of gas.
the evaporator mayibe'reduced. The outer pas
and liquid whereby the weakenedabsorption so
lution will be raised to the top of the absorber A. to sageway of the ,c‘onlcentric tube evaporator E
forms a‘ portion of a heat transfer circuit which ‘
The absorber A is also positioned in a vertical
_ position in the back of the apparatus compart i _ will be described-in more. detail hereinafter.
ment ‘.I'I slightlyin front of the condenser C and _
The evaporation of refrigerant into the inert
gas in the evaporator E forms a rich mixture of
has a continuous downward slope throughout so
that the absorption solution can ?ow downward 65 inert gas and ammonia‘vapor whichleaves the
evaporator by conduit 33, flows through the inner
ly therethrough by gravity. The absorption solu- '
passageway of the concentric tube heat exchanger
tion which enters the top of the absorber flows
downwardly therethrough. in counter?ow to av
32 and.- enters the bottom tube'o'fthe absorber A
mixture of inert gas and refrigerant vapor from ' through a horizontal U-bend 34. Any absorp
the evaporator whereby the refrigerant vapor 70 tion solutionvapor which‘ may enter the con
content of the mixture is absorbed in the weak
~ denser in spite of the analyzer and rectifier R will
‘ '‘ ened solution and the heat of absorption is trans- - be condensed and carried along with the inert gas
ferred to the cooling air by air cooling fins 28 . mixture through the conduit 33, the inner passage
mounted on the absorber tubes.
‘ of the concentric tube gas heat exchanger 32, the
I The absorption of the refrigerant vapor ‘by the 75 horizontal U-bend 34' and drain from the bottom
s
2,387,657
tube of the absorber A through the conduit .23
along with the absorption solution. 7
_
The mixture of inert gas and refrigerant vapor
which enters the bottom tube of theeabsor-ber A
?ows‘upwardly therethrough in counter?ow to
. the weak absorption solution flowing- downwardly
therethrough and the refrigerant vapor content
of the mixture is absorbed by the absorption solu
which also drives the circulator fan F through a ‘
magnetic transmission to be described herein
after is positioned to circulate cooling air from
the bottom and front of the ‘apparatus compart
ment backwardly over the absorber A and 'the
condenser C and the cooling air will exit through
the louvers la in the back or the apparatus
compartment. The tube l2 which forms the
tion and the inert gas leaves the top tube of the
products of combustion ?ue and extends through
absorber A comparatively free of ammonia vapor 10 the boiler H has a ?at extension 48 which ex~
and is returned to the- circulating fan F through
tends upwardly along the rear wall 43 of the
the suction conduit 3|.
.
i
cabinet l5 so as to vcarry away the products of
The outer passageway of the concentric tube
combustionto the upper portion of the cabinet
evaporator E is connected by a conduit 35 to the ~ and yet have the cabinet capable of being posi
header 36 of the cooling unit generally indicated 15 tionedclosely against a wall.
‘I
by 31 which is positioned in the food storage com- _
The supply. of energy to the motor and the
partment l6 of the cabinet l5 considerably above
supply of gas ‘to the burner for heating the
the apparatus compartment I‘! in which the
boiler ll may be controlled responsive to’ the
evaporator E is positioned. The lower header
cooling unit. 31 or to the temperature of the
33 of the'cooling unit 31 is connected to the oppo 20 food storage compartment If; by a circuit such
site end of the concentric tube evaporator E by
as shown in Figure 2 of. the drawings. The con—
conduit 39. In‘order to circulate the secondary
trol includes a thermostatic bulb 43, which may
cooling liquid through the outer passageway of the
be positioned in contact with the cooling unit
concentric tube evaporator E, the conduit 35, the
31 or positioned in the interior of the food storage
cooling unit '31 and the conduit 39, a bleed con
compartment l6, connected to a control device 56
duit 46 leads from the discharge conduit 26 of
which may be a .control‘such as shown and ‘de
the circulating fan F to the upwardly extending
scribed
in the patent to Coons, 2,228,343, grant
portion‘ of the conduit 35. The liquid level in
ed January 14, 1941, or any other suitable con
the secondary heat transfer circuit which com
prises the outer passageway of the concentric tube 30 ' As shown in Figure 2 one side of the power line
evaporator E, conduit 35, cooling unit 31 and con
is connected directly to the motor M and tea
; duit 39 is above the point of connection between
magnetic valve 5| in the gas line supplying
the conduits 46 and '35 so that the inert gas
combustible gas to the burner for the boiler H
under pressure ?owing through the conduit 40 will
form alternate slugs of inert gas and the second 35 while the"other.slde of the power line is con»
nected to those elements through the interme
ary heat transfer liquid in the upwardly extend
diary of the controldevice 56 so that the supply
ing conduit 35 above its point of connection with
of electricity to the motor M and gas to the
‘theconduit 46 and positively circulate the sec
burner
for "the boiler H is intermittently sup-g
ondary heat transfer liquid. The inert gas which
plied and cut oil responsive tothe temperature of
enters the header 36 of the cooling unit 31 is‘ 40 the cooling element 31 or the food storage com
separated from the liquid in the header 36 and is
partment i6 depending upon where the bulb 49
returned to the suction conduit 3| of the circulat- ' is positioned.
.
.
in'g ran F by conduit 4|.
Figure 3 shows the construction of the circulate
The horizontal portions of the conduits 35, 39,
ing fan F, the motor M and the magnetic trans
'46, and 4| are preferably embedded in the bot 45 mission for transmitting power from the motor -'
tom insulated wall 42 of the food storage com
M to the fan F located on the interior walls of
trol.
' partment l6 and their vertigally extending por
_ tions above the horizontal portions are embedded
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the inert gas circuit. ‘ The fan F is housed in a
housing 62 connected to the suction and dis
in the back insulated wall 43 of the food storage
charge conduits 3| and 26, respectively, forming
compartment. The evaporator E and the con 50 a part of ‘the inert gas circuit,‘and has end‘
duits 35 and 33 leading downwardly from the bot
closures 53 and 54.‘ The interior of the housing
tom wall 42 hi the ‘food storage compartment are
52 is divided into a‘ suctionchamber 55 and a
also embedded ininsulation. If desired the gas
pressure chamber 56 by a partition 51 having an
heat exchanger 32 may also be embedded in in
opening 58 leading to the eye of the‘ fan. The
sulation. This insulation has not been shown in 55 hub 59 of the fan'is pressed tightly over the ex
the drawings so that the location of the conduits
terior of a cylindrical permanent magnet 66 hav
of the apparatus could be more clearly shown.
ing a plurality of poles on its inner face. and a
The portions of the insulated walls 42 and 43 in
hub 6| connectedto a shaft 62 mountedjor ro
which the conduits 35, 39, 46 and 4t are em
tation on bearing assemblies 63 and 64 on the in
bedded, are preferably removable from the re w terior of the casing '52. Secured to the end clo
mainder of the walls, as shown, to form a remov
sure .53 is an inwardly extending cup shaped
able closure carried by the conduits 36, 39, 46 and
member 65 which extends closely adjacent to
>4l so that the entire apparatus can be removed
‘the ‘poles of the permanent'magnet 66, the inner
vrearwardly from the cabinet as a. unit.
‘
end of which supports thev bearing assembly 64.
Headers 36 and 38 of the cooling unit 31 are 65 The cup-shaped member 65 is made of non-mag
preferably connected bya plurality of conduits
44 which form a support for a housing 45 to re
ceive ice trays.
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The lower tube of the condenser C-is connected
‘netic material.
,
' Secured to the outer face of the end closure 63
is an annular ring 66 which supports the motor
'M through the intermediary of a rubber ring 31
to the suction conduit 3! of the circulator fan I" 70 bonded by vulcanization to the inner, periphery
by a vent conduit 46 and the solution reservoir
_of the ring 66 and to the outer‘periphery of a
S is connected to the conduit 46 by a vent conduit . ring'63 secured to the ‘periphery of the motor
41 so that any inert gas finding its way into these
M. One end of the motor shaft carries the air
‘ vessels will be returned to the inert gas circuit. '
circulating am III while the opposite end car
The fan 10 which is driven by the motor M
ries a'second permanent magnet 63 which ex
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2,887,857
at a level above said evaporator, means includ
‘ tends into the interior of the non-magnetic cup
shaped member 65 to closely adjacent the per
,n'ianent magnet 60. The permanentmagnet 69
has the same number of poles‘on its exterior
ing a gas lift pump for utilizing the pressure dif
ference in said inert gas circuit for raising said
1 secondary heat transfer liquid into the said cool
ing unit, and means for venting said cooling unit
periphery as the ‘permanent‘magnet has on its
interior periphery so that when the motor is en
ergized and its shaft rotated the magnet‘ 60 and,
to said inert gas circuit.
1
4.-A refrigerating apparatus comprising an in- '
the fan F will be rotated by magnetic attraction
ert gas'circuit including .an evaporator and an.
to themagnet 69.
_
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'
absorber, a secondary heat transfer circuit in- '
While in Figure 1 the suction conduit 3| is 10 cluding a cooling unit and an element surround
‘shown as leading through the end closure of the
ing and in heat transfer relationship with said
fan F, in actual practice it would .be made as I
evaporator,‘ means for placing said inert ‘gasyun
shown in Figure 3, the arrangement of Figure‘
I being shown merely for the purpose of clarity
.» der pressure in said inert gas circuit, and means
of illustration.
‘
for utilizing a portion of said vinert gas placed
15 under pressure for circulating a secondary heat
,
,From the foregoing it can be seen that this in
', transfer ?uid in said secondary heat transfer cirvention provides an absorption refrigerating ap
paratus in which all of the operating parts can
5. A refrigerating apparatus comprising an in
be housed in' the apparatus compartment be
ert gas circuit including an- evaporator and an
neath the food storage compartment of a'domes 20 absorber, a secondary heat transfer circuit in
tic refrigerator and having a mechanical cir
cluding a cooling umt and an element surround
culator for circulating ‘the refrigerant, the inert
ing and in heat transfer relationship with said
cult.
gas and the‘ absorption solution in the refrig
eration apparatus proper, in which an indirect
heat transfer liquid in heat transfer relation
‘
>
evaporator, means for placing said inert gas un
der pressure in said inert gas circuit, and means
for utilizing a portion of said inert gas placed
under pressure for circulating the secondary ‘heat
transfer ?uid in said secondary heat transfer cir
cuit, said last mentioned means including a gas
ship with'the evaporator‘positioned in the ap-,
paratus compartment is alsocircul'ated byv the
circulator unit through a secondary heat trans
fer circuit including the cooling unit positioned
in the food storage compartment, andin which
'
lift pump.
30
the supply of energy to the circulator unit and
the fuel to the boiler is simultaneously energized v
'
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6. A refrigerating‘ apparatus comprising an in
ert gas circuit including an evaporator and an
absorber, a secondary heat transfer circuit in
responsive to the temperature of the cooling unit,
cluding a cooling unit and an element surround
or that of the food storage compartment, so that
all the mediums in therefrigerating system prop
ing and in heat transfer relationship with said
evaporator, means for placing said inert gas un
der pressure in said inert gas circuit, means for
utilizing a portion of said inert gas placed under‘
er and‘, the secondary heat transfer liquid will be >
circulated simultaneously with the'application of
heat to the boiler.
_
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While I have shown but a single embodiment ~
of ‘my invention it is to be understood that this .
embodiment is to be taken as illustrative only
and not in a limiting sense. I do not wish to
1 be limited to the particular structure shown and
‘
40
pressure-for circulating the secondary heat trans
fer ?uidin said secondary heat transfer circuit,
and means for returning the inert gas to said in
ert gas circuit.
>
7. A refrigerating apparatus comprising an in
ert gas circuit including an evaporator and an
described but to include all equivalent variations 45 absorber,~a fan in said inert gas circuit for cir
thereof except ‘as limited’ by the scopeof the
culating an inert gas, a secondary heat transfer
circuitv including an element surrounding and in
heat transfer with said evaporator and a cooling
claims.
vIclaim:
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,1. An absorption refrigerating apparatus com
unit positioned above said evaporator, a conduit _
prising an inert gas circuit including an evap 50 ‘leading from‘ the pressure side of said fan to said
orator and an absorbenfmeans for producing a ‘ circuit below the liquid level therein for leading
pressure difference in said inert gas. circuit, a sec-l
inert gas to said secondary circuit'for circulating
ondary heat transfer liquid in heat exchange with
a heat transfer ?uid therein.
said evaporator, a cooling unit positioned above ‘
‘
8. In combination, a domestic refrigerator cab
said evaporator, and means utilizing the pressure 65 inetlhaving an upper food storage compartment
and a lower apparatus compartment, an inert gas
' difference in said inert gas circuit for raising said
secondary heat transfer liquid into said cooling
unit.
‘
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circuit including ‘an evaporator and an absorber
.
2. An absorption refrigerating apparatus com
prising an' inert gas circuit including .an evap
orator and an absorber, means for producing a i
' pressure difference in said inert gas circuit, a
secondary heat transfer liquid ‘in heat exchange
with said evaporator, a cooling unit positioned
60
positioned in said apparatus compartment, a cools
ing unit positioned in said food storage compart
ment, or heat transfer element'in heat exchange
with said evaporator in said apparatus compart- "
ment and means for utilizing the pressure differ; -
ence in said inert gas circuit for raising ‘a sec
7 ondary heat transfer liquid from said heat'trans
at a level above said evaporator, and means in 65 fer element into said cooling units‘
cluding a gas lift pump for utilizing the pressure
9. In combination, a domestic refrigerator cab- difference in said inert gas circuit for raising said
inet' having an upper food storage compartment
secondary heat transfer liquid into said cooling _ and‘a lower‘ apparatus compartment, a refrig
unit."
,
..
crating-apparatus associated with said cabinet
3. An absorption refrigerating apparatus com‘ 70 having an inert gas-circuit means for producing a
prising an ‘inert gas circuit‘ including an evap
pressure difference in; said inert gas’ circuit, a
orator and an absorber, means for producing a
cooling unit in said food storage compartment,
pressure difference in said inert gas circuit, a , 9. heat transfer element in heat, exchange with
secondary heat transfer fluid in heat exchange
said evaporator in said apparatus compartment,‘ '
with said evaporator, a ‘cooling unit positioned 76 means for utilizing the pressure difference in said
1
‘2,887,657
inert gas for raising a heat transfer ?uid from
said heat transfer element to said cooling unit.
5 .
14. in combination, a domestic refrigerator
cabinet having an upper food storage compart
‘ 10. ‘In combination, a domestic refrigerator ’
ment‘and a lower apparatus compartment, a re
cabinet having an apparatus compartment and
frigerating apparatus associated with said cabinet.
a food storage compartment, an air-cooled ab 5 ‘comprising an inert gas circuit including an evap
, sorption refrigerating apparatus associated there- '
with, said apparatus including a vertically ex
orator positioned in said apparatus compartment
below said food storage compartment, a second
‘ tending air-cooled condenser positioned adjacent
the rear wall of said apparatus compartment, a
ary heat transfer circuit including a cooling unit '
\ positionedin said food storage compartment and
solution circuit in ‘said apparatus compartment 10 a heat vexchange element in heat exchange with
- including a generator and a vertically-extending
‘ said evaporator in said apparatus compartment,
absorber positioned immediately in front of said
condenser, an, inert gas circuit including said ab
and means. in said inert gas circuit for circulating
an inert gas therein and for circulating a heat -
sorber and an'. evaporator, a fan in said inert
transfer fluid in said heat transfercircuit from
gas circuit for circulating the inert gas therein, 15 said heat exchange element to said cooling unit
a motorpositioned exteriorly of said inert gas
and back to said heat exchange element.
circuit in said apparatus compartment, a mag
15. In combination, a‘ domestic refrigerator ‘
netic transmission for transmitting motion from - ‘cabinet having an upper food storage compart
said motor to said fan through the walls of said
ment and a lower apparatus compartment, a re
inert gas circuit, an air circulating fan positioned
frigerating apparatus associated with said cab
in said apparatus compartment in front of said
condenser and absorber to circulate cooling air
inet comprising an inert gas circuit including an
thereover and being driven by said motor.’
partment below said food storage compartment,
evaporator positioned in said apparatus com
_ 11. In combination, a domestic refrigerator
a, secondary heat transfer circuit including a
cabinet havingv an apparatus compartme'ntand 25 cooling unit positioned in said food storage com
a‘ food storage compartment, an air-cooled ab
partment and a heat exchange element in heat
sorption refrigerating apparatus associated there
' exchange with said evaporator in said apparatus
with, said apparatus including a vertically ex
compartment, a fan in said inert gas circuit for
tending air-cooled condenser'positioned adjacent
circulating an inert gas therein and for supply
the rear wall of said apparatus compartment, a 30 ing inert gas to said heat transfer circuit for
solution circuit in said apparatus compartment
circulating the heat transfer liquid from said
including a generator and a vertically extending
heat exchange element to said ‘cooling unit.
absorber positioned immediately in front ‘of said
16. In combination, a domestic‘ refrigerator '
condenser, an inert gas circuit‘ in said apparatus
cabinet having anupper food storage compart
compartment including said absorber and an at ment and a lower apparatus compartment, a
evaporator, a fan in said inert gas circuit for cir
refrigerating apparatus associated with said cab
culating an inert gas therein, a-motor positioned
exteriorly of said inert gas circuit in said appa-i
ratus compartment, a magnetic transmission for
inet comprising an inert gas circuit including an
evaporator positioned in said apparatus com
partment below said food storage compartment,
‘ transmitting motion from said motor to said fan 40 secondary heat transfer circuit including a cool-_
through the walls of said inert gas circuit, an"
air circulatingfan positioned inv said apparatus .
compartment in front of said condenser and ab
ing unit positioned in said food storage compart
ment and a heat exchange element in heat ex
change with said evaporator in said apparatus
sorber to circulate cooling air thereover and being
compartment,
a fan ‘in said inert ‘gas circuit for
driven by said motor, a cooling unit in said food 45, circulating an inert gas therein and for supply?
storage compartment and means for transferring
in: inert gas in said heat transfer circuit for
heat from said cooling unit to said evaporator. '
~ circulating a heat transfer liquid from said heat
12. An absorption refrigerating apparatus com-‘ ' exchange elenient to said cooling unit and means
prising/an inert gas circuit including an‘ evapo
for returning the inert gas supplied to said heat ,
ratcr and an absorber, a solution circuit includ 60
ing said absorber and a generator, a condenser,
means for leading liquid refrigerant from said
condenser to said evaporator, a secondary heat
transfer circuit including a cooling unit posi
tioned above said evaporator and a heat exchange
‘transfer circuit to said inert gas circuit.
17. A' refrigerating apparatus comprising an ‘ '
inert gas circuit including an evaporator,,a sec
, ondary heat transfer circuit including a cooling '
unit and a heat exchange element in heat ex
change-with said evaporator, means for creating
a pressure difference in said inert gas circuit,’
and means for circulating anvinert gas in said
means for utilizing only'a portion‘ of the inert gas
inert gas circuit between said evaporator and said
at its raised pressure for circulating the heat
absorber, for circulating an absorption solution in
transfer liquid from said heat exchange element
said solution circuit between said absorber and 60 tosaid cooling unit and means for returning the
said generator, for circulating the refrigerant
inert gas utilized in said heat'transfer circuit
through said evaporator and for circulating‘ a
to said inert gas circuit.
element in heat exchange with said evaporator
‘heat transfer liquidin said heat transfer circuit
between said heat exchange element and said
‘ cooling unit.
'
-
13- A refrigerating apparatus comprising an in
ert gas circuit including an evaporator, a sec
ondary heat transfer circuit including a cooling
18. An absorption refrigerating apparatus
comprising, an ‘inert gas circuit including an
as evaporator and an absorber, a solution circuit
including said absorber and a generator, a con
denser, means for leading condensed refrigerant
from said condenser to said evaporator, a sec
ondary heat-transfer circuit including a cooling
change with said evaporator, means for creating 70 unit positioned above said evaporator and a heat’
a pressure difference in said inert gas circuit, and ,
exchange element in heat exchange with said
means for utilizingv a portion only of said inert
evaporator, motor-driven, means for circulating
unit and a heat exchange element in heat ex
gas at its raised pressure for circulating a heat,
transfer liquid from said heat exchange element
to] said cooling unit.
-,
the inert gas between said evaporator and ab- '
75 ‘sorber, for circulating an absorption solution be-,,
‘tween said generator and said absorber,tfor cir- »
a
6
2,887,657
culating liquid refrigerant‘ through said evap
unit and a heat exchange element in heat ex-'
orator and for circulating a heat transfer ?uid
in said‘ heat transfer circuit between said heat
transfer element and said cooling unit, and means
for controlling said motor-driven meansv respon
change with said evaporator, means for creating
sive to the demand for refrigeration whereby the
circulation of inert gas, solution, refrigerant and
heat transfer ?uid simultaneously starts and
stops responsive to refrigeration demand.
a'pressure di?erential in said inert gas circuit,
means, for utilizing aportion only of the inert
gas at its raised pressure for circulating the heat
transfer liquid from said heat exchange element
' to said cooling unit, and means for controlling
the operation of said ,pressure-di?erential-cre-.
ating means responsive to refrigeration demand
19. .\A refrigerating apparatus ‘ comprising an 10 to simultaneously start and stop circulation of
inert gas circuit including an, evaporator, a sec
inert gas and heat transfer liquid.
ondary heat transfer circuit including a cooling
ALFRED G. GROSS.
.
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