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Патент USA US2117929

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May 17, 1938.
w. w; WATT
2,117,929
REFRIGERA'I‘ING APPARATUS
Filed Oct. 24, 1934
2 Shegts-Sheet l
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BY
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INVENTOR.
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, ATTORNEYS,
.
‘
May 17, 1938.
2,117,929
w. w. WATT
REFRIGERATING APPARATUS
2 Sheets-Sheet 2
Filed Oct. 24, 1934
I
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INVENTOR.
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.
BY
W MUM
HIS
ATTORNEY:
Patented May 11,1938
2,117,929
UNITED STATES PATENT OFFICE
REFRIGERATING APPARATUS .
William W. Watt, Dayton, Ohio, assignor to Gen
eral Motors Corporation, Dayton, Ohio, a cor
poration of Delaware
Application October 24, 1934, Serial No. 749,788
8 Claims.
The present invention relates to refrigerating
apparatus and particularly to an evaporator
therefor.
' ‘
(Cl. 62-126)
showing
therein;
my improved evaporator
mounted
Fig. 4 is an enlarged. vertical sectional view
An object of the present invention is to provide an improved evaporator for quickly freezing
substances placed in thermal association there-
of the evaporator shown in the cabinet in Fig.
2 and is taken on the line 4-4 thereof;
Fig. 5 is‘ a fragmentary top view of the evapo
with.
rator shown in Fig. 4;
'
Another object of the present invention is to
provide an improved evaporator having a max1" imum of cooling surface in direct thermal'contact with walls of containers ‘or the like placed
v in or on the evaporator and adapted to contain
a substance to be congealed or frozen.
Another object of ‘the invention is to provide
"7 an improved evaporator for installation in a re-
Fig. 6_is a fragmentary sectional view of the
evaporator taken on the lines 6-6 of Fig. 5;' and
Fig; 7 is a sectional view of the evaporator 10
taken on the line 'l—'l of. Fig. 5.‘
Referring to the drawings, for the Purpose Of
illustrating my‘ invention,- I have shown in Fig.
1 thereof a refrigerator cabinet l0 having a door
ll provided on the top thereof and affording ac- 15
frigerator cabinet of the so-called top opening '
cess to a food storage compartment '2 (See Figs- I '
type which evaporator will ei?ciently cool the in-
2 and‘ 3) formed by the insulated Vertical Walls
terior of the cabinet while at the same time
quickly chilling substances to be congealed ‘or
20 frozen.
1
,
l3 and an insulated bottom wall M.
The lid or
door II is Suitably insulated and forms the top
wall of the food storage compartment I2.
A more speci?c object of the invention is to '
provide an evaporator with a plurality of com-
I
20
Within the food Storage compartment '2 0f
Cabinet '0 there is mounted, in any Suitable
partments for the reception of cups or the like
receptacles, containing a substance to be con1:") gealcd or frozen, and constructing the compartments so that the walls thereof will conform to
the contour of the Walls of the cups to thereby
permit substantially all of the walls of the cups
to be in direct thermal association with the com-
manner. a unitary cooling element 01‘ evaporate!‘
generally designated by the reference character
20; The evaporator or cooling unit 20 includes a 25
Vertically disposed portion for eoolirig and 09.115
ing circulation of air in the food storage com
Pertinent '2 and also includes a horizontally dis
posed freezing portion 22- The air cooling por
.‘Iil partment walls and consequently refrigerant
.cjrculated through the evaporator.
In carrying out the foregoing object, it is 3,
still further object of the invention to provide
tion 2| of evaporator 20 is constructed of sheet 30
metal portions
and
(See Fig.
Secured
together at certain points and having certain
‘other Points thereof spaced apart to provide an
means whereby a receptacle or’ cup located with-
upper header or manifold 26 and a lower header
in a compartment formed in an, evaporator, of v or manifold 27 with passageways 1'8 of any suit- 35
the type herein disclosed. can be quickly and .7 able size or con?guration connecting the headers .
readily removed_
Further objects and advantages of the present
invention will be apparent from the following
‘description, reference being had to the accom-
3‘ plura'hty of sheets of metal forming a plurality
of walls of 8' chambefr or passage 32‘ The one 40
panying drawings, wherein a preferred form of
wall 33 of it“: mummy.“ Walls 9f chamber or
the present invention is clearly shown.
passage 32 15 secured’ m any smtable manmf'r
In the drawings:
.
.
>
such as by welding, tothe upper part of the air
Fio 1 discloses a refrigerator cabinet of the
"-7
26 and 21 with one another. The freezing por
tion 22 Pf the?‘ evaporawr 2” includes a sheet 01"
~"
.
.
.
'
coohng pomon 2' of the evaporator’
This wall
33 of chamber 32 is provided with an opening 34 45
type having a plurality of stationary walls and , adjacent one end of the chamber 32 (See Fig_ 4)
' 2' mPvable top wall or door cooperatmg with the which communicates with the header 26 and
stationary WELHS and affording access to 9. com-
,3)
which opening also Serves as an outlet‘, for re_
Pertinent formed. by the Walls Within the Cabinet?
frigerant circulated through the chamber. At
Fig- 2 is an enlarged Cross-Sectional View Of
the cabinet disclosed in Fig. 1 and is taken on
lines 2—2 thereof Showing my improved eVaDO-
the end 35 of the chamber 32, opposite the end 50
thereof which the opening 34 is adjacent, there - 1
is provided an inlet 36 for the ingress of re
rator mounted therein;
frigerant to the chamber 32. "The lower header
Fig. 3 is an enlarged fragmentary sectional ' 21 of the air cooling portion .121 of evaporator
55 view ‘of the cabinet taken on line 3-3 of Fig. 2
20 is provided with an outlet 23] ‘for refrigerant. 55
2,117,929
2
The inlet 36 and outlet 3'! of the evaporator are
connected by suitable pipes or conduits 39 and
a portion of the walls 52 of the cups 5i and ?t
between the ?ange 53, formed on cup 5i, and. the
4| respectively with a refrigerant liquefying and
circulating unit of any conventional and well
known form shown diagrammatically in Fig. 2.
any suitable manner to form a lever for prying
Refrigerant may be admitted to the evaporator
20, under the control of any suitable valve or
restrictor device 42 (see Figs. 2 and 3), through
the inlet 36. Refrigerant ?ows from the conduit
10 39 into the chamber 32 through the inlet 36 at
the end 35 of the chamber thence through cham
ber 32 to the opening 34. The refrigerant upon
passing through opening 34 ?ows downwardly
through one of the plurality of passageways 28
15 to header 2'! and thence upwardly through a plu
rality of the passageways 28 to header 25 and
through the outlet 37 and conduit 45 back to
the refrigerant liquefying unit. It is to be un
derstood that the refrigerating system may be
20 of the so-called dry expansion type or the evapo
rator may, if desired, be of the flooded type.
The top wall 43 of the freezing portion 22 or of
the chamber 32 of evaporator 25 has a plurality
' of depressions formed therein providing a plu
25 rality of compartments 44. These compartments
44 may be of any desired horizontal cross-sec
tional form and are preferably cylindrical as dis
closed and the side walls 46 thereof preferably
diverge inwardly from the top to the bottom,
30 thereof to form tapering compartments. The bot
tom wall 41 of the chamber 32 is provided with
a plurality of depressions 48 each of which are
disposed directly opposite the bottom wall 49 of
the compartments 44. The depressions 48 abut
against and may be welded or otherwise secured
to the walls 49 so as to strengthen the chamber
32 against deformation due to internal pressures.
It will be noted that the structure described
40
permits substantially all of the walls of compart
ments 44 to be exposed to refrigerant ?owing
through the chamber 32 or to be in direct thermal
contact with the refrigerant. The entire evapo
rator 20 may be plated with a’metallic plating
applied thereto in any suitable manner or it may
be coated with a vitreous enamel coating which
may be baked thereon to aiford a neat and durable
?nish.
Each of the plurality of compartments 44 is
adapted to receive and support a cup adapted to
50'
contain water or any other substance to be con
gealed'or‘frozen. 'For this purpose I have shown
a cup 5| locatedein a compartment 44. The cup
5| includes a side wall 52 which is of substan
tially the same contour as the side walls 46 of
compartment 44' or in other words the side wall
52 of the cups 5| diverge inwardly from the top to
the bottom of the cup. The cup is adapted to ?t
into the compartment 44 in such a manner that,
when its side wall 52 engages the side wall 46 of
the compartment, its bottom wall also engages
the bottom wall 49 of the compartment. The
cups 5| are slightly taller than the heighth of
compartments 44 and have a ?ange 53 formed
around their top edge.
65
Flange 53 is normally
top surface of the top wall 43 of chamber 32 in
the cup upwardly and out of the compartment 44.
To remove a cup 56 from the compartment 44 the
handle end 51 of instrument 55 may be manually
moved upwardly or downwardly, as desired, to
loosen and move-the cup into the position shown
by the dotted lines in Fig. 7.
From the foregoing description of the appa
ratus disclosed it will be apparent that I have
provided an improved evaporator and particu
larly an improved evaporator for installation in
the type of refrigerator cabinet herein disclosed.
My improved evaporator and the arrangement of
the cups therein affords fast freezing of sub
stance contained in the cups. The improved
evaporator can be manufactured at a low cost
thus rendering same particularly applicable for
installation in a cabinet of the type herein shown
and described since such cabinet is of the small
low, cost variety adapted for installation and use
in camps, lodges and summer cottages.
My im
proved evaporator and the individual receptacles
or cups supported therein permits removal-of
one or more ice cubes or blocks as desired from
the evaporator without disturbing other cups
desired to be retained in the evaporator thereby
avoiding overloading the refrigerating apparatus '
connected with the evaporator and rendering
operation of the apparatus more economical.
Thisfeature of my invention is important in view
of the fact that all the cups 'or ice cubes or blocks
in an evaporator of an apparatus of the type dis- I
closed are seldom required to be removed at one
time from the evaporator, thus permitting a re
frigerant liquefying and circulating unit of small
capacity and low manufacturing cost to be em
ployed.
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
adopted, all coming within the scope of the claims
which follow.
What is claimed is as follows:
1. A refrigerating apparatus comprising in
combination, a cabinet having a bottom wall and
a plurality of side walls de?ning a food storage
compartment, a movable door on the top of said
food storage compartment affording access there
to, an evaporator of a refrigerant circulating
system mounted in said compartment, said evapo
rator including a vertically disposed air cooling
portion and a horizontally disposed freezing por
tion, said freezing portion of said evaporator
comprising an elongated substantially flat closed
refrigerant expansion chamber having an inlet
and an outlet for the circulation of refrigerant
therethrough, the top wall of said chamber having 60
a plurality of depressions therein each forming a
compartment for the reception of a cup adapted
to contain a substance to be congealed or frozen,
and substantially all the walls of each of saidcup
spaced above the surface of the top wall 43 of ‘ receiving compartments being in intimate thermal 65
the chamber 32, when the cup is in position in
compartment 44, for the purpose of permitting
a key or lever device to be placed between the
?ange 53 and the wall surface 43 to effect re
70 moval of the cup 5| from the compartment 44. I
provide a key, lever or the like instrument 55 for
prying the cups .5l loose from the walls of com
partment 44. The instrument 55 includes two leg
portions 56 and a handle portion 51. Leg por
75 tions 56 of instrument 55 straddles or surrounds
contact with refrigerant adapted to be circulated
through said expansion chamber.
2. A refrigerating apparatus comprising in
combination, a cabinet having a. bottom wall and
a plurality of side walls de?ning a food storage 70
compartment, a movable door on the top ,of said
food storage compartment affording access there
to, an evaporator of a refrigerant circulating
system mounted in said compartment, said evapo-_
rator including a vertically disposed air cooling 75
3
2,117,929
portion and a horizontally disposed freezing por
tion, said freezing portion of said evaporator
comprising an elongated substantially ?at closed
refrigerant expansion chamber having an inlet
and an outlet for the circulation of refrigerant
substantially the same contour as the. converging
compartment walls.
6. A unitary evaporator structure for a refrig
erating system comprising a vertically disposed air
cooling portion and a horizontally disposed freez
therethrough, the top wall of said chamber having , ing portion, said portions of said evaporator hav
a plurality of depressions therein each forming a ing closed expansion chambers formed therein,
compartment for the reception of a cup adapted
to contain a substance to be congealed or frozen,
10 and substantially all the walls of each of said cup
receiving compartments being in intimate ther
mal contact with refrigerant adapted to be cir
culated through said expansion chamber, the
side walls of each of said cup receiving com
partments converging inwardly from the top to
the bottom of said cup compartments.
3. An evaporator for a refrigerating system
comprising walls forming an elongated substan
tially ?at horizontally disposed refrigerant cham
20 ber therebetween having an inlet and an outlet
for the circulation of refrigerant therethrough,
the top wall of said chamber having a plurality of
depressions therein each forming a compartment
for the reception of a cup, each compartment
25 having a closed bottom wall and side walls extend
ing upwardly therefrom and entirely therearound,
a cup removably disposed within each of said
compartments and adapted to contain a sub
stance to be congealed or frozen, and the bottom
30 and side walls of each of said compartments being
in intimate thermal contact with refrigerant
adapted to be circulated through said chamber
and with substantially all of the walls of said cups.
4. An evaporator for a refrigerating system
at comprising walls forming an elongated substan
tially ?at horizontally disposed refrigerant cham
ber therebetween having an inlet and an outlet
for the circulation of refrigerant therethrough,
the top wall of said chamber having a plurality
40 of depressions therein each forming a compart
ment for the reception of a cup, each compart
ment having a closed bottom wall and side walls
extending upwardly therefrom and entirely there
a-round, a cup removably disposed within each of
45 said compartments and adapted to contain a sub
stance to be congealed or frozen, and the bottom
and side walls of each of said compartments be
ing in intimate thermal contact with refrigerant
adapted to be circulated through said chamber
and with substantiallyall of the walls of said
cups, the side walls of each of said compartments
converging inwardly from the top to the bottom v
of said compartments.
5. An evaporator for a refrigerating system
55 comprising walls forming an elongated substan
tially flat horizontally disposed refrigerant cham
ber therebetween having an inlet and an outlet
for the circulation of refrigerant therethrough,
the top wall of said chamber having a plurality
60 of depressions therein each ‘forming a compart- .
ment for the reception of a cup, each compart
ment having a closed bottom wall and sidewalls
extending upwardly therefrom and entirely there
around, a cup removably disposed within each of
65 said compartments and adapted to contain a sub
stance to be congealed or frozen, the bottom and‘
side walls of each of said compartments being in
' intimate thermal contact with refrigerant adapted
to be circulated through said chamber and with
70 substantially all of the walls of said cups, the
side walls of each of said compartments converg
ing inwardly from the top to the bottom of said
compartments, and the walls of said cups being of
means
for "circulating a refrigerant medium
through the expansion chamber of said portions
of said evaporator, said freezing portion of said 10
evaporator comprising an elongated substantially
flat element having a plurality of depressions
formed in its top wall each providing a compart
ment for the reception of a cup, each compart
ment having a closed bottom wall and side walls 15
extending upwardly therefrom, a cup removably
disposed within each of said compartments and
adapted to contain a substance to be congealed
or frozen, and the bottom and side walls of each
of said compartments being in intimate thermal
contact with refrigerant adapted to be circulated
through said element and with substantially all
‘ of the walls of said cups.
‘
'7. A unitary evaporator structure for a refrig
erating system comprising a vertically disposed air 25
cooling portion and a horizontally disposed freez
ing'portion, said portions of said evaporator hav
ing closed expansion chambers formed therein,
meansv for circulating a refrigerant medium
through the expansion chambers of said portions 30
of said evaporator, said freezing portion of said
evaporator comprising an elongated substantially
?at element having a plurality of depressions
formed in its top wall each providing a compart
ment for the reception of a cup, each compart 35
ment having a closed bottom wall and side walls
extending upwardly therefrom, a cup removably
disposed within each of said compartments and
adapted to contain a substance to be congealed
or frozen, and the bottom and side walls of each 40
of said compartments being in intimate thermal
contact with refrigerant adapted to be circulated
through said element and with substantially all
of the walls of said cups, the side walls of each of
said compartments converging inwardly from the
top to the bottom of said compartments.
8. A unitary evaporator structure for a refrig
erating‘ system comprising a vertically disposed
air cooling portion and a horizontally disposed
freezing portion, said portions of said evaporator
having closed expansion chambers formed there
in, means for circulating a refrigerant medium
through the expansion chambers of said por
tions of said evaporator, said freezing portion of
said evaporator comprising an elongated substan
tially flat element having a plurality of depres 65
sions formed in its top wall each providing a
compartment for the reception of a cup, each
compartment having a closed bottom wall and
side walls extending upwardly therefrom, a cup
removably disposed within each of said compart
ments and adapted to contain a substance to be
congealed or frozen, the bottom and side walls_of
each of said compartments being in intimate
thermal contact with refrigerant adapted to be
circulated through said ‘element and with sub 85
stantially all of the walls of said cups, the side
walls of each of said compartments converging
inwardly from the top to the bottom of said com
partments, and the walls of said cups being of
substantially the same contour as the converging 70
compartment walls.
WILLIAM W. WATT.
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