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Патент USA US2411296

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‘
N‘W- 19"‘1946-
s. user-WELLER I
‘
‘ ‘2,411,296 v "
REFRIGERATING Arum-ms
Filed July so, 1943 ‘
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Patented Nov. 19,
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2,411,296
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- ‘ UNITED "STATES ' PAT ENT’T'OFFICE‘ ,
2,411,296 ‘
‘ ,aamronmrmc APPARATUS ‘
Sylvesterf‘Mr ‘Schweller, Dayton, Ohio, as‘signor to‘,‘ , ‘ t
General
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Motors, Corporation, ‘Dayton, ‘Ohio, a
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corporation of Delaware
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Application July 30, 1943,‘ Serial N0.,496,718 \ ,
“ Z‘CIaims. (Cl. .62-—116)“
My, invention relates‘ to refrigerating apparatus
invention embodied in household ‘ refrigerating
apparatus.
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Referring now to the drawingfor‘ illustrating
of the type ,employing‘a hermetically sealed re
frigerating :system that cannot, as a practical
_matter, be servicedlon thepremises wherethe ‘
' my invention,“ I‘ have shown in‘ Fig. lithereof a _
. refrigerator
In such apparatuses,
is installed.‘it hasbeen'customary
I
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1 I t‘
i, , to
mount the sealed refrigerating system in the re
frigerator cabinet in such a manner that'the en
tire system can be, removed as a ,unit; and re
turned to the factory or service centerfor repair.‘
This practice has not been entirely‘ satisfactory
andiin addition has: its disadvantages. 1 It com
plicatesandincreases ‘the cost of arrefrigerator
cabinet construction in ,that it ‘necessitates the
provisionof an additional sealed ‘opening in “a
‘wall structure of, the cabinet through which the
evaporatormay be" removed“ , In other structures
- it necessitates some specialconstruction sueh‘as
the provision of :grooves' or recesses in the door
Jamb, behind a removable doormolding, for the
reception of conduits connecting the evaporator
to‘ the motor-compressor." In these structures
proper sealing of‘ the“ refrigerated, chamber,
against heat leakage, is impaired by the‘breaking
. ofthe seal between detachableparts of the cabi
net constructionwhen the system is removed and,
furthermore, such structures all' limit the size
and shape ‘of an evaporator such that it canbe
removed as required.
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refrigerating ‘apparatusvof‘the ice cream or, fro
zen food storagetype. This apparatus comprises
a‘cabinet I0 enclosed ininetal walls Hand pro
vided with a storage‘, chamber; l2 formed by a
metal liner l4. Any, suitable: insulating; mate
rial l5 may surround‘ the liner I 4 for insulating
the chamber i2,» The-cabinet illialsothas a ma-‘
chine compartment ltviformed therein adjacent
‘chamber 12. A door, or doors l1 may normally
‘close an access opening, formed in the ‘cabinet
top wall, leading to the interior‘of chamber l2.
The wall of cabinet l0 intermediate chamber‘ I 2
and ‘machine compartment I6 is. providedwith a
cavity formed by a box-like'member l8 having ‘
two supporting ledges
2| and 22
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toibe presently, described. This
for a purpose
cavity may " be
closed by a removable plate 23 or, a plurality ‘of ‘
such removable plates secured to member “18 by
screws
24.
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A closed‘ orhermetically sealed ‘refrigerating
‘system associated with cabinetv'lli“ includes an
evaporator 26, in the form‘of a conduit‘lcoil,
secured to and extending, over‘walls or‘the, liner
member ll of ‘chamber l2. This evaporator‘is
I propose to overcome the disadvantages of 30 fixed or built-in the cabinet‘ I 0 as distingushed
froma structurewherein the evaporator can be
such present day refrigerators by providing means ,
removed ‘from the cabinet. ‘The evaporator 26
so placed in a hermetically sealed‘ refrigerating
is connectedbyconduits with a refrigerant‘lique
system with respect to the evaporatorthereof
fying and circulating; unit‘ removably ‘located
that the‘ entire high pressure side ,of the system
‘within the‘machine'compartment;1 It. ‘The re
including the motor-compressor; condenser and
the refrigerant ?ow control means may be sepa 35 frigerant liquefying and circulating unit :com
, prises a sealed casing 28 housing a conventional
‘rated from the evaporator. In this manner I
motor directly connected to arotary orthe like
provide for the removal from the apparatus and.
The unit also comprises a-condenser
the return tothefactory or‘service center of‘that
29 and a conventional snap acting switch 30
portion of the system containing ‘all the ‘elements 40 showndiagrammatically.
“Casing 28‘ and con
‘wherein trouble, which causes failure‘oi' the re
denser 29 are mounted upon a base 3| which‘re
frigerating system‘, usually‘ ‘occurs. By reason
movably supports 'th zse elements within the‘c'om
vof my arrangementrI also eliminate all‘limita
partment Hi so as to provide for the removability
tionsheretofore placed upon the design and size 'of the refrigerant liquefying and circulating unit
of the evaporator, for, since it is unnecessary to 45 ,as will be hereinafter, described. ‘ Operation of
, compressor. '
remove" the evaporator, it may be ?xed within
the motor-‘compressor within‘ casing ‘281‘cau‘ses
or built-in to form a permanent partof the re
evaporated refrigerant ‘to be‘ withdrawn ‘from
evaporator 26 through a. conduit" and circu
lated intothe casing 28. I The ‘compressor ‘com
frigerator.
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In the drawing‘:
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a
Fig. 1 is a vertical sectional view through a, re 50 presses the refrigerantvapor entering the‘casing
28 and forwards‘same under pressure,‘ throug’ha
frigerating apparatus having a closed refrigerat4
ing system of‘the present invention associated, conduit‘ 34, ‘into the condenser‘ 29. The‘ com
therewith;
and
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:pressed refrigerant is cooled in any suitable or a
conventional manner in condenser 29 and is lique
_‘ Fig. 2 is'a view similarto Fig. 1 showing my 55 ?ed.
Liquid refrigerant isconveyemby a con
2,411,296
4
may be started and stopped in any well-known
or conventional manner such as in response to
Then the one portion or. the refrigerant'lique! '
the pressure in the low pressure side or conduit
.yfyilng~ and‘ circulating unit, including valved cou- .
‘33 of the closedrefrigerating system. Thus‘a
plings 42 arid 45, switch 38, base 3|, upon which
pipe line 31 communicating with and branching
the motor-compressor casing' 28 and the con
off conduit 33 extends to an expansible and con
tractable bellows 38 of the switch 38 which con“
' denser 28 is mounted, and restrictor 48 of the re
frigerating system is separated from‘ evaporator
trols the electric circuit to the motor and con-* _
26 and removed from compartment l6 of cabinet '
sequently controls operation of ‘the‘motor-com-‘l
pressor within the casing 28';
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are rotated, by a key or the like, so as to close
all of the valves within the four valved couplings.
Thereafter bolts 43 are removed and coupling
42 is detached from coupling 4| and bolts 48 are
removed to detach coupling 45 from coupling 44.‘
to therefore remove heat from the storage cham
ber l2. The motor-compressor within casing 28
‘
.
and 48 respectively. The stems of these valves
duit 36, from condenser 28 into the lower por- 7‘
tion of evaporator 28 for reevaporation therein
In ‘of the apparatus. By including the restrictor
‘
In the present refrigerating system there are
two valved couplings, of any suitable or conven
tional construction, interposed in eachof the con-
48 in theremovable portion of the system a source
duits 33 and 36 and these valved couplings. are
located in the cavityformed in the insulating
thoroughly cleaned at the time a burned out mo-j
20 tor or other damaged part is repaired and/or
wall extending between the chamber vl2‘ andcom
M partment l8.
of deposit or of ‘accumulation for contaminating
substance maybe returned to the factory with ‘
the removable unit where this element can ‘bev
'--The cavity formed by box-like
member I8 is filled with any suitable and remov
‘replaced.
Upon .vrever‘sing I the operations, de- -
> scribedgin separating and‘ removing the 'remo‘vk
able portion of. the refrigerating system from the
able? insulatingrmaterial 38 disposed or packed 7. I_--flxed
portion thereof within the apparatus,‘ a
about the valved couplings." One valved ‘coupling
replacement unit can be ‘readily installed in the
4| is‘stationarlly ‘secured to‘the support ledge 2| 25 ‘
refrigerating apparatus.
' on member I8 and-communicates with another.
.
‘'
. In Fig; 2 I ‘have shown my‘ invention-‘embodied
valved coupling 42 which is removably, mounted
to the ledge II by bolts ‘or'the like 43'. ‘A valved
coupling 44, corresponding'to coupling 4|, is sta
in 'a'household refrigerating apparatus wherein .
the unit or ‘machine compartment is below'a food
‘ tionarily secured to the support ledge 22 on mem '30 storage chamber and have illustrated the'various
ber > l8 and ' communicates with: another valved
similar‘or corresponding elements of'vthe appa
ratus shown in'Fig. lby reference charactershav
" coupling 46 ‘which is removably mounted to the
' ledge '22 by bolts or the like-48. It will be noted
ingsletter ‘~‘a" affixed thereto. ‘lit‘wlll be noted that ‘
in the refrigerating apparatus‘ shown in-lFig. 2,
' that: in, the. present refrigerating system the .
means for controlling the flow of liquid refriger 35 vevaporator 26a is of the embossed sheet"metal
type‘and may be of'anysuitable or-convent’ional ‘
‘ ant into the‘ evaporator 26 is in the form of a
: restrictor 48 interposed in conduit 36 inadvance
.of the removable valve ‘coupling '45.?‘ Restrictor
'48 may be of anyconventional construction‘ and
the type having a relatively long- continuously‘
design. "Evaporator .2iia‘iisinv accordance with
my‘ invention, adapted to be fixed or ‘permanently
built-in the" chamber i2a aswdistinguished’rfrom
conventional‘ refrigerators‘ wherein the. evapo-'
-rator may be removably' mountedlin-the cooling
chamber. This modi?cation of the Jshowingof _
v ‘the
adaptability-of ‘my invention is. illustrated‘ '
,open passage therethrough of small cross'sec
tional area and of. spiral orWany-other desired
form. Liquid refrigerant passing through re~
thatadvantages afforded in .prac
stricter 48 expands through the valved couplings , for thetreason
: the invention permits unlimited possibil
"46 and 44 into the, evaporator “and for'thisv 45 ticing
ities Vin-designs of refrigerating ‘apparatus ‘and _
, reason it is desired to locate the valved couplings
particularly household refrigerators; For :ex
Aland 44 as‘near'the inlet to‘ evaporator 28" as
. ample, .many ‘different arrangements -of. interior
.is possible.‘
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construction of household refrigeratorswcan . be ’
The valved couplings area‘dapted to‘ divide the
60 obtained by my.-v making the restrictor ‘removable
apparatus disclosed in Fig. 1 into two portions. . withua separable'and removable portion of the
closed refrigerating system‘ of the ‘refrigerating
refrigerating‘ systemv which thus ‘permits, the
evaporator.‘ to be, fixed or permanently built-in‘ a,‘
cabinet-as a part'of the interior structure of-the
'The one portion or evaporator '28 ‘of the refriger
ating-systemis ?xed or permanently mounted in
the, cabinet was a part thereof while the other
portion or the refrigerant liquefylng’ and circu
latingunitis adapted to be removable from the
apparatus. Thefeatureof including the refrig
‘cooling compartment thereof.“
erant flow controldevice or restrictor 48 in-the
removable portion of therefrigerating systemis
important 6 , for, reasons .herelnabove' pointed out i
, and which will now be'described morein detail.
Should‘the refrigerant liquefying and circulating
unit become inoperative, due to damage inter
'nally,0f;the sealed casing 28, this unit can be
readily. removed from the refrigerating system‘. »
.withoutflosingi any appreciable‘ amount ‘of re
frigerant fromthesystemv and without impairing
proper?operationof the system when the unit is
repaired andreplaced.
For example, ‘i should it
, be necessary to replace the refrigerantrliquefyingv
and- circulating unit, plate or plates 23 are re
moved and enough of the loose insulation 39
taken .out of the cavity, formed by. member |8,'to
permit access to the stems 6|, ‘52, Hand 55-of
valves located in‘the valved couplings“, 42,‘ 44
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. From the foregoing, it willbe seen that I have,
‘ by-llocating the refrigerant,'?owpontrol device
or restrictorin that portion of-a separable ‘closed
or hermetically sealed refrigerating ‘system ‘which
is removable from a portion-withinitherefriger
ating v-apparatus, provided, an ‘improved appa
ratus. vMy invention-teat only facilitates the
servicing of installationsdof;refrigerating appa
ratus but also eliminates recurrence offailure of .
elements of the‘refrigerating sysjtem'associated~
‘ therewith by the fact that a‘ replacement unit is
'factory repaired with'especially designed ?xtures‘ ‘
which insures thorough cleaning of the parts" of
the system, which parts cannot be properly
cleaned elsewhere with equipment ordinarily car-j
ried by a service man, such for example, as at l‘
the point of installation-of'the apparatus. My ?
improvement permits the‘ construction of refri8—'
erator cabinets to) be greatly'simpliiied and man
ufactured at lower ‘costs while at the same time
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2,411,296
making it possible to ?r: or permanently mount
evaporators of various sizes and shapes within
such‘ cabinets without complicating or impair- ‘
ing proper servicing of refrigerating systems‘as
‘ sociated with the refrigerator cabinets.
While the form of embodiment of the invention
as herein disclosed constitutes a preferred form,
it is to be understood that other forms might be
‘ paratus when said separation is e?ected, and said
‘first named means beinginterposed in one of said
conduits between said unit and said last named
‘means and being removable along with said unit
6 from said apparatus.
‘
2. A refrigerating apparatus ‘ comprising in
combination, a cabinet having a chamber therein
to be cooled, a closed refrigerating system asso
ciated with said apparatus, said refrigerating
claims which follow.
‘
10 system including an evaporator ?xed within said
What is claimed‘is as follows:
cabinet for cooling said chamber, a refrigerant
1. A ‘ refrigerating apparatus comprising ‘ in
and circulating unit connected by con
combination, a cabinet having a chamber therein ' liquefying
duits‘ with said evaporator and a continuously
to be cooled; a closed refrigerating system asso
open restrictor for controlling the ?ow of re
ciated with said apparatus, said refrigerating 15 frigerant
‘from said unit to said evaporator,‘
system including an evaporator ?xed within said
means interposed in said conduits ‘for closing oif
cabinet for cooling said chamber, a refrigerant
each conduit at two adiacentpoints and for per
liquefying and circulating unit connected by con
mitting separation of said unit from said evapo
duits with‘ said evaporator and means for con
rator intermediate said points, said unit being re
trolling the ?ow of refrigerant from said unit to 20 movable from said apparatus when said separa
said evaporator, means interposed in said con
tion is effected, and said restrictor being inter‘
duits for closing off each conduit at two adja
posed in one of said conduits between said unit
cent points and for permitting separation of said
and said means and being removable along with
unit from said‘ evaporator intermediate said
said unit from said apparatus.
points, said unit being removable from said ap 25
‘ SYLVESTER M. SCHWEILER.
adopted, as may come within‘ the scope of the
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