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Nov. 19, 1946.
2,411,461
L. A. PHlLlPP
REFaIeBRuim APPARATUS
Filed Dec. 10, 1942
2 Sheets-$11561, 1 "
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BY
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Nov. 19‘ 11946.
L. A. PHILIPP
2,41 1,461
REFRIGERATING APPARATUS
Filed Dec. 10, 1942
2 Sheets-Sheet 2
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INVENTOR.‘
Lamar!“ I1. Pmuwr'
Patented Nov. 19, 1946
’ 2,411,461?
UNITED STATES PATENT. OFFICE
_ REFRIGERATING APPARATUS
Lawrence A. Philipp, Detroit, Mich., assignor to
Nash-Kelvinator Corporation, Detroit, Mich,
a corporation of Maryland
‘
Application December 10, 1942, Serial hlo. 468,487,
8 Claims.
“1' 62-89)
2
This invention relates to refrigerating appa- '
ratus.
-
rator 38 is secured to the exterior‘ wall of the
- I liner 22 and extends across a portion of the rear
7
One of the objects of my invention is to pro
vide an improved arrangement in a multiple
wall and the bottom .wall of the liner. The
evaporator 38 is utilized for cooling a portion of
temperature refrigerator for maintaining the
cabinet insulation free of moisture.
the food storage compartment 38 by absorbing
heat through the walls of the liner. The evapo
rator 36 is positioned in the upper portion of the
Another object of my invention is to provide
in a refrigerator a low temperature'evaporator
food storage compartment and is utilized for
and ‘a relatively high temperature evaporator,
which higher temperature evaporator is located
adjacent theinsu'lation of the refrigerator, and
- freezing substances and for cooling circulating
to arrange said insulation in such a manner
that there is a space for water vapor diffusion
Located in the machine compartment 32 is a
from moisture collected on ‘said high tempera
ture evaporator to said low temperaturelevapo
rator.
air in the upper portion of the food storage com
partment 36.
'
refrigerant condensing unit 46.
The condensing
unit includes a motor compressor unit 42 which
15 compresses refrigerant and delivers it to a 'con- ‘
denser 46 wherein it is liqui?ed and from which
Further objects and advantages of the present , ’ it is delivered to the evaporator 36 through-a
invention will be apparent from the following
small diameter conduit 56. This small diameter
description, reference being had to the accom~
conduit 58 controls the ?ow of refrigerant ?owing
panying drawings, wherein a preferred form of 20 to evaporator 36 by metering the correct amount
, of liquid refrigerant. Evaporated refrigerant is
' the present invention is clearly shown.
In the drawings:
withdrawn from evaporator 36 to the condensing
unit through conduit 5|.
'
Fig. 1 is a view in elevation and partly broken.
away of a refrigerator embodying features of m
In addition to the evaporators 36 and 3.8, a
third evaporator 52, is provided for condensing
invention;
evaporated refrigerant from the evaporator 38.
Fig. 2 is a view taken along line 2-1-2 of Fig. 1;
F1Fig. 3 is a view taken along thev line 3-3 of
Fig. 4 is a view taken‘ along the line
Fig. 2 ;
of ;
'
Fig. 5 is a view taken along theline 5-5 of
Fig. ‘2;
and
‘
_
g
'
Fig. 6 is a fragmentary view in perspective
showing a channel member embodying features
of my invention.
'
'
‘
_ The evaporator. 52 is positioned in the insula-.
tion' between the inner casing‘ and outer casing
and is coiled about a tank 64, which tank iscon
'nected to the evaporator 38 in such a manner_
that both ends of theevaporator 38 are in open
communication with the interior of the tank 66.
Liquid refrigerant passing through, the small di
ameter conduit 50 ?rst passes to the evaporator
62 whereit is in good heat exchange relation
Referring to the drawings, the numeral 26
designates, in general, a refrigerator cabinet
with the tank 54 to condense any evaporated re
bin 35.
ing point of water at least part of the time.
frigerant contained in the tank 54. ‘The liquid
refrigerant then passes through evaporator 52
having an inner metallic liner 22 and an outer
into conduit 60 whence it ?ows into the primary
metallic casing 24.. Interposed between the in
ner liner 22 and the outer casing 2t is insula 40 evaporator 36. Preferably, the'evaporator 36 is
of the so-called ?ooded'type and operates below
tion 21. The inner liner 22 forms walls of food
the freezing point of water during operation of
storage compartment 36. In the lower portion
the condensing‘. unit. The high temperature
of the cabinet is provided a machine compart
evaporator 38 is utilized for cooling the lower
ment 32. The front part of the food storage
compartment is closed by door 33 and the front - portion of the food storage compartment through
the walls of the liner, and preferably this evapo~ "
part of the machine compartment‘ 321s closed
rator operates at a temperature above the freez
by door 34 which carries a movable vegetable
-
'
The-refrigerator herein disclosed is of the mul
Within the food storage compartment there
tiple temperature type and includes an ice 50 are provided glass shelves 64, 66 and 68. ‘These
making evaporator 36 of a primary refrigerating
shelves are horizontallyrpositloned in the food
system positioned in the food storage compart
storage compartment and extend from the front
‘ ment 38, and also includes a relatively high tem
of the cabinet to a point-adjacent the rear wall
perature evaporator 38 which forms a part of a
of the liner. As will be noted, the shelves are
secondary ' refrigerating system. The evapo 55 slightly spaced from the rear wall of the linerv
_
9,411,401
,
so as to permit a slight circulation of air along ‘
4
'
v
,
it has been found that insulation as originally in
stalled in the refrigerator contains some moisture
the rear wall of the liner above and below the
glass shelves. Adjacent the front part of the >
and after a period of operation in a refrigerator, ‘
as herein disclosed, the actual moisture content of _
the insulation was less than when originally in- - ‘
_ food storage compartment and at the lower por
tion thereof, I have provided glass doors 12, which
doors cooperate vwith the bottom -wall of the '
liner and glass shelf 66 to provide-for enclosing
'a high humidity compartment which is‘ refrig
erated by evaporator 38.
.
Any suitable form of insulation maybe uti
lized between the inner liner and outer casing.
‘ such, for example, as cork herein shown,-or other
serted in the refrigerator. It will, therefore, be
noted that in my improved refrigerator the in
sulation remains dry although multiple tempera
tures are maintained and liner cooling forms a
1.0 part of the refrigerator.
Further details of the cabinet construction and '
refrigerant primary and secondary systems here
' well known insulating materials, such, for ex->
in disclosed and the operation of said systems, to- '
ample, as vcorrugated paper, “rock wool’? or other
iibrous material, as desired.
,
v
In refrigerators of the type herein disclosed
gethei' withthe air flow in the cabinet, are more
15 specifically described in my Patent No. 2,361,792,
issued October 31, 1944, for'Refrigerating ap
paratus, of which the present application is an
tendency to collect moisture on the refrigerant
improvement and has provisions for venting thev
~ evaporators positioned between the inner liner , - insulation between the high and low tempera
' and outer casing and on the exterior walls of the 20 ture evaporators whereby moisture is allowed to
lining-member, and in the absence of some pro
di?use in the air and pass to the low tempera- _
ture evaporator. ‘
visions for disposing of such moisture the in
sulation becomes wetted and loses its insulat
Although only a preferred form of the inven-v .
ing qualities. In order to overcome this obiec- , - tion has been illustrated, and that form described
8 tion, I have providedin the insulation immedi 25 in detail, it will be apparent to those skilled in
wherein liner cooling is employed, there is a
. ately below the bottom wall of the liner, chan
- the art that various modi?cations may be made
nels ‘II and in_ the insulation extending‘ up the
rear wall of'the liner I have provided channels
80. These channels are adjacent the evaporator
therein without departing from the spirit of
the invention or from the scope of the
claims.
appended '
'
i
38 and each channel 80 is in open ‘communica 30 Iclaim:
'
tion with a channel 18. Also, in the upper por
1. Refrigerating apparatus comprising a cabi- .
tion of the cabinet I haveprovided metallic chan
net having an inner liner andanouter casing,
nel members 82 which are in open communica
insulation between said liner and easing, said
tion with the channels 80. These metallic chan
[liner forming walls of a food storage‘ compart
nel members-are utilized in connection with in
sulation, herein denoted as 88, as the insulation.
'86 is adapted to be removed from the cabinet in
‘ment, a refrigerant evaporator positioned in said
food compartment and being adapted vto operate
at a relatively low temperature, and a refrigerant
the event it is desired to remove the evaporator
evaporator positioned on the exterior surface of '
38 therefrom. In such case it may be desirable
said liner and being adapted to operate at ‘a rela
to utilize insulation atthis particular place of the 40 tively high temperature and above the freezing
typewhich may be loose ?brous material since it
may be readily removed and inserted about the
point of water at least part of the time, said in~
_ sulation being spaced from said evaporator posi- ,
_ channel members 82 and the evaporator 52. A re- -
tioned on said liner and said liner having an
movable panel 90 is provided at the rear of the
opening in a wall thereof communicating ‘with
insulation 86v and an opening 92 is provided in ' the space between the insulation and liner to
the liner 22. This opening will permit the re
establish a communication path between said ,
moval of the evaporator 36 through the rear wall
evaporators to allow-for water vapor diffusion in
' of the cabinet without disconnecting the-refriger
air from the moisture collected on the relatively
ant conduits associated therewith. The opening‘ high temperature evaporator to ?ow to the rela
92 is partially closed by cover panel 98; which is
‘secured to the liner“ by studs 100. It is noted
that this cover panel 98 is spaced from the inner
tively low temperature evaporator.
'
2. Refrigerating apparatus comprising a cabi
net having an inner liner and an outer casing, '
liner 22 so as to allow a passage 99 between the
insulation between ‘said liner and-casing, said
food storage compartment and the insulation on
liner forming walls of a food storage compart
the exterior of the side of the liner 22. It willalso
be noted that the opening 92 is adjacent the
ment, a refrigerant evaporator positioned in said
food compartment ‘and being adapted to operate
‘channel members 82 whereby a passageway is
at a relatively low temperature‘, and a refriger
provided from the interior of the food storage _
‘ compartment through the space 99 between the
ant evaporator positioned- on the exterior surface
of said liner and being adapted to operate at a
liner 2-2 and cover plate 98 and through the spaces
relatively high temperature and above the freez
provided by channel members 82 and channels 60 ing point of water at least part of the time, said
80 and 18. Consequently, there is a- complete
insulation being channelled adjacent said evap
' - passage open between the evaporator 38 and the,
orator positioned on said liner and-said liner
evaporator 38. ‘By this arrangement water vapor
‘having an opening in a wall thereof communidiil'usion in air permits the moisture collecting 65 eating with the channelled space betweenthe in- on the ‘rear side of a liner member and on the
sulation and liner to establish a communication
evaporator 88 to move by diffusion through-the
passageways ‘I8, 80 and 99 and into the interior
of the food storage compartment where the mois
ture contacts the- low temperature evaporator 38 70
and is frozen out thereon. Thus, moisture does
not '“collect between the inner liner and outer
casing to such an‘ extent that the insulation would
become wetted and ‘lose its insulating charac
teristics.‘ In actual test of such an arrangement; 75
_
path between said evaporators to allow for water
vapor diffusion in air from the moisture col
lected on. the relatively high temperature-evap
orator to. ?ow to the relatively low temperature
evaporator.
_
‘
~
3. Refrigeratingapparatus comprising a cabi-
net, a liner for said cabinet, said liner having an
opening, a relatively low temperature evaporator
positioned in said cabinet on the interior side of
2,411,461
said liner, a relatively high temperature evapora
net having a liner forming walls ‘of a food com- ‘
partment and having an opening, a refrigerant -
tor positioned in said cabinet on the opposite side
ofsaid liner, and insulation positioned in said
cabinet adjacent said high temperature evapora
tor, said high temperautre evaporator being
adapted to operate above the freezing point of
water at least a portion of the time and being
so positioned as to condense out moisture from
the air contacting said insulation and high tem
perature evaporator and said insulation including
evaporator secured to the exterior rear and bot
tom, wail of said liner, a relatively ‘low temper
ature evaporator positioned in said food ‘com
partment of said cabinet, and insulation posi
tioned adjacent said rear‘and. bottom walls of
said liner on the exterior side of said liner and
being provided with a channelled portion to pro
vide a passageway to said opening to provide a
a channel to provide ;with said liner opening a
path for the passage of vapor from one evaporator
vent for water vapor diffusion in, air from mois
ture collected on the relatively high temperature
to the other.
evaporator so that said moisture may ?ow to the
‘
inet having a liner forming walls of a food stor
age compartment, a refrigerant evaporator se
cured to the exterior rear and bottom walls oi’
relatively low temperature evaporator.
4. Refrigerating apparatus comprising a cabi
net having a liner forming walls of a food stor
age compartment‘ and having'an opening, a re-_
frigerant evaporator positioned in heat exchange
relation with an exterior surface of said liner, a 20
relatively low temperature evaporator in said food
storage compartment. of said cabinet and insu
>
'l. Refrigerating apparatus comprising a cab- I‘ "
said liner, a relatively low temperature evapora
tor positioned in said cabinet in ‘the interior of
said liner in said compartment, said liner being
provided with an opening in its rear wall, and
insulation positioned on the exterior of said liner
adjacent said rear and bottom walls and being
lation channelled to allow a vent along said ex
channelled along the rear and bottom walls to
terior surface of said liner to said opening to
provide a passageway to said opening and between
provide a path for the passage of vapor from-one 25 said evaporators.
evaporator to the other,
‘
8. Refrigerating apparatus comprising‘ a cam5. Refrigerating apparatus comprising a cabi
net having a linerforming walls of a food stor
net having a liner forming walls of the food stor- ,
age compartment, a secondary refrigerant evap
age compartment and having an opening, a re- '
orator secured to the exterior rear and bottom
frigerant evaporator secured to the exterior rear 30 walls of said liner, a relatively low temperature
surface of said liner, a relatively coldtrefrigerant
primary refrigerant evaporator positioned in said
evaporator positioned in said food compartment
of said cabinet, and‘ insulation positioned adja
food storage compartment of said cabinet, said
liner being provided with an opening, an insu- _
cent saidv exterior rear surface of said liner and
lation positioned on the exterior side of said liner
being provided with a channelled portion to allow 35 adjacent said rear and bottom walls of said liner
' a passageway to said opening to provide afpath
7 and being provided with a, channelled portion to
for the passage of vapor from one evaporator to
provide a ‘passageway to said opening to provide.
the other.
a communication path between said evaporators. _
_'
.
‘
6. Refrigerating apparatus comprising av cabi
LAWRENCE A. RHILIPP.
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