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Патент USA US2121083

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June 21, 19381
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L. D. KELLOGG
REFRIGERATING
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2,121,083
SYSTEM
Filed Oct. 15, 1951
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i L E'?’ay 17, ‘32911029 .
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.BEFnIGErtA'rmG sYs'rEM
‘ " Leroy _D.\-Kellogg; Deer-?eld, Ill., assignor‘to Kel
.
‘on-Switchboard and Supply Company, Chi
1 V cago; 111., a corporation oi‘ Illinois
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. Application October '15, ‘1931'. Serial No.v 568,914 '
' JMy' invention'
.
relates
.
toTrefrigerating
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11Claims.(0l.62—-4)I
systems ‘gizlng circuit of
’ an electromagnetic
_.
.q
;device herein
' 1 land more particularly ‘to that type of mechani-_v
shown as an electromagnet R’.
cal ‘refrigerating system used in. the home for
The device R’; ~
is associated with a valve V, a detailed view 01,
preserving food supplies and the like.
. _
which is shown in Fig. 2, and controls the op
'- Such a system usually comprises a cooling coil, eration thereof as will be explained later. _. - ‘ '5
. .a compressor anda condenser}. The liquid reThe motor M drives a wheel W by suitable
frigerant passes into the cooling ‘coil where it means such as a belt b. Wheel W is ?xed to'the- ,
p ‘ vaporizes thereby‘ lowering the, temperature of crank shaft CK of the compressor CP which coin-_ .
f the compartmentin which the cooling coil is 10-. , prises a cylinder cy, a piston P, and a connecting ' ,
6
"lo cated. 'I'hecompressor removes thevapor from
l- the cooling coil ‘and passes it‘ to‘the condenser
rod or which joins‘the piston to the crank shaft 10 1
‘CK. Valves 1; and v’ are provided at thertop
, under pressure where it is converted back into
of the cylinder 01/ and are. adapted to assume the
"a liquid. The compressor is driven by a motor, alternate positions shown‘ in dotted'lines.
or engine of any ‘suitable type which starts andv
Pipes 1) and ‘p’ are provided toconduct a liquid
16 stops underv the control of means, such as a "refrigerant such as ‘ammonia to the cooling coil 15
'
thermostat,’ responsive’ to . the temperature or CC. A pressure reducing valve EX, commonly
‘condition of the compartment being cooled. _ known as an expansion valve,'is interposed‘be- -
Under ordinary circumstancesin the average
home the compressor will bevoperating only about
.20 one-'thirdioi'the'time. '._It is an object of my in-‘
i vention vto provide'ja .secondfcooling coil which ‘_
tween‘the'pip'e'p' ‘and co? CC. The other end of _
the coil CC is connected by'a pipe p2 to the valve ' '
V. Pipe p also supplies a second cooling coil CC’ 80
similar to coil CC, with the selected liquid re
may be'utilized to coolanother compartment..\fr'igerant through-an expansion valve EX'._ The
such as .a room in the home and. to usethe same r other ‘end of t e coil CC’ is connected to the
compressor ,to ‘operate ‘in vconjunction with the Valve, V by a Di m3 ‘equipped with a two Pressure
second cooling coil when it is'not in use with the
cooling coil of the food refrigerator,‘ ,.
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valve, to which is oi“\\a' type well known in- the 28
,art and maintains thfeproper pressure relation
Another objectoi my invention is the provision -'
v‘of means ior automatically controlling the op‘ 'eration of my improved system of, refrigeration.
between the coil CC’ and the compressor 0?.
u '
,The valveV comprises a casing;v -(see ‘Fig. 2)
within whichis located the electromagnetlcrdel
30 ‘ , Referring, to the accompanying drawingpin v_ vice‘R'_-’having an armature 4 pivoted at ‘point’ 80
which like reference characters ‘in the different . 5. The end 6 of the armature l is'uprovided" with
' views represent like parts,.
j '_ _'
- ‘ I the‘ movable valve membersl‘and 8 formed of
~ _
Flg.-_ 1 is a schematic .drawing‘of the refrig-l. any suitable material and secured to the arma- '
,‘
crating system of my ‘invention; and
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- ture in’anydesiredmanner; The member ‘I is
35 ' Fig.1 ‘2'is ,a detail view oi! the valve vused in; ‘adapted to_iit-into the end of pipe 323 to ‘normally '85
'the system.
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r ,
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‘close
that pipe.
This normal position of the
In ‘Fig, '1_ aliquid receiver LR is provided which ?'member .1; may be; maintained by having -the > '
contains a suitable'amountof any desirable liquid . armature 4 weighted or under spring-tension or
_ ‘ ‘refrigerant such as : sulphur dioxide, ammonia or
in any otherjway. When an energizing circuit is
‘mignfother similar substance, , A foodccmpar't- closed ‘for the device- R’ the armature 4 is at- 40
, .ment FC'in which food may be placed is"provided k tracted thereby and as‘ it is pifgotedat 6 wlll're
A ; with a. cooling coil cc which occupies a portion ‘ move the member 1 from the end ‘of pipe 11‘ and Y ‘
i
‘ of, the space therein. Usually it'is‘desired that
the temperature of such a compartment be main-
will. cause the member 8’ to enterjthe 'end' of '_
pipe 122. .The .valvel?as shown in Fig. 2 is merely ,
4-5 "tained between a'high point of. about 20° F. and‘a- a diagrammatic‘ illustration of anyxof the well ‘I
. " ‘is
lowallowed
point of'about
to vary between
5‘? ‘F, that
these
is, the
twotemperature
points_.. _ To ~ Itis
known‘
totwo-way
be understood
valves that
whichI do
arenot
old wish
in theto__be
pair
obtainoi-contactsgwhich
this desired result
may
a be
switch
thermostatically
'34 havlng'a vlimited-to_the
. any of the two-way
device valves
shownwhich
butthat
areI'ai'm
capable
to or
,50 controlled is also located in the'cor?part‘ment FC.
being electrically‘ operated’ to produce the de-- 50
I - . ', an
These
electromagnetic
contactsS control
device an
or relay
energizing
3',- theclrcuitifor
contact I - - .-scribed
' A pipedesired
p4 extends
result;
from the
- ' .valve
‘
V to
v the
v
’_intgke _
of which controls one‘circuit for an electric ‘motor. ‘side of the‘ compressor 01? and a pipe 95 extends
M, the purpose of whichv will be described present- from the output side .ofv the compressor 6'1? to a
' 55 ly, and the contact
of whichcontrols the ener- ' condenser CQN
'reirigerant'is "
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2
2,121,083
changed into a liquid and passes to the liquid
receiver LR through the pipe 126. The condenser
M which ceases operating and stops the com
pressor CP. All the apparatus is normal at this
v CON may be of the air cooled or water cooled
type or any other desired form.
,
time.
The cooling coil CC’ may be located in a box
Bar of an air conditioning device which is con
nected with a room in the house which it is de
sired to cool.
either manually or under the control of a thermo
static device. The closure of, the contacts b
and b’ establishes an operating circuit for the
If desired, means such as an elec
electric motor M which may be traced over con
tric fan, not shown, may be provided to force the
cooled air in the box Ba: into the room to be
ductor I, [contacts b’ and b, conductor 9, motor
M and conductor I’. The motor M operates and 10
drives the compressor C? as before explained.
The contacts a and a’ move to heir alternate posi
tions and close an energizing‘ circuit for the relay
R’ which may be traced from, the battery B’,
cooled. A double switch S’ is locatedin the room
to be cooled and may be controlled manually or
by means of a thermostat located in the room.
When the switch S’ is actuated the contacts a;
15 and a’ engage each other to close an energizing
circuit for the electromagnetic device R’ located
in the valve V and the contacts b and b’ close
to establish a circuit to operate the motor M.
Batteries B and B’ are provided to furnishcurrent
20
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Assume next that the switch S’ is operated
conductor I0, relay R’, conductor II, contacts 15
a and a’, conductor I2, normal contact 2 to the
battery B’. The relay R’ is energized over this
circuit and attracts its armature I which removes
the member ‘I from the end of pipe p3 and places
to‘energize, the electromagnets R and R’. ‘The
the member 8 in the end of pipe W to close the 20
leads I and I’ are connected to any suitable source
same. Under these circumstances the gas in the
‘of current such as the house lighting system and /unit CC’ will be drawn into the cylinder c1!
furnish operating current for the motor M.
The operation of the system of my invention
25 is as follows. Assume that the temperature in.
the food compartment PC has risen sufficiently
through, pipe 123 and valve to, valve V, pipe
124 and valve 12'. On the upward stroke of the
piston P the gas is passed into the condenser CON 25
under considerable pressure where it is changed
to cause the thermostat (not shown) to close the _ back into liquid form and passes into the liquid
contacts of switch S. Current will immediately receiver LR as before explained.
Should the switch S’ be operated while the
?ow from
thethe
closed
positive
switchside
S, the
of coil
the of
battery
relay R‘
B
30 through
unit CC is in operation nothing will happen until 30
to the negative pole of battery B. This flow 01’
current will energize the relay R which will at-,
tract its armatures I and 2. The attraction of
armature 2 prevents the energization of the relay;
the switch S, which controls the operation of the
unit CC, opens its contacts. As long as relay R
is energized the contact 2 is in its alternate posi
tion and the energizing circuit for relay‘ R’ is
R’. The attraction of contact I closes an oper
open. As soon as switch S opens its contacts the
ating circuit for the electric motor M which cir
relay R deenergizes and restores contact 2 to its 35
cuit can be traced from one side of the supply normal position thereby closing one break in the
line, over conductor I, alternate contact I of re
energizing circuit for electromagnet R’ previous
lay R, through the motor M to the other side of ly traced.
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40 the line via conductor I’.
If the unit CC’ is being operated and the switch 40
The motor M operates and rotates the wheel W ‘ S is ‘closed the relay R will energize over a cir
which causes a reciprocating movement of the cuit previously traced and will open normal con
piston P within the cylinder cy as is well under
tact 2 which-opens the circuit for electromagnet
stood by those skilled in the art. The liquid re
R’ which deenergizes. Upon the deenergization
45 frigerant, which is under considerable pressure,v of device R’ the armature 4 opens the pipe 12’ and 45
'?ows from LR through the pipes p and p’ to'th'e' closes-the pipe 93 which causes the compressor
' expansion valve Er where it is passed into the GP to withdraw gas from the cooling coil CC in
coil CC under a greatly reduced pressure. The stead of from coil CC’. It will thus be seen that
temperature of the air in the food compartment - the cooling coil or unit CC’ is subordinate, at all
60 is su?iciently high to cause the liquid refrigerant ' times, to the unit CC. ~
to boil or change into a gas. The heat used to
While I have illustrated and described one em
cause this change is taken from the air and the
bodiment of my invention it is to be understood
that I do not wish to be limited thereto-Mas al
temperature in the food compartment isv accordj
ingly
55
reduced.
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‘ terations and modi?cations may readily suggest
As the armature l of the valve V is in‘, its nor
themselves'to those skilled in the art, but aim to 55
mal position the member 8 israised andlthe-end ~ cover all’ cases which come within the spirit and _ .
of pipe p" is open. As the piston 1’ moves down-_ ,scope of the appended claims. .‘
_ wardly the valves 0 and v’ assume their alternate
positions indicated by the dotted lines and the gas 1
60 in the cooling 0011 CC is drawn through pipe p‘,
Having described my invention, what I claim
as new and desire to secure by United States Let-‘
ters Patent is:
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valve V, pipe péand valve 0' into the cylinderjcmj
As the piston P moves upwardly the valvef'}_v’= '. 1. A refrigerating system of the character de-_
scribed including‘ a compressor, a condenser, a
closes and the gas withinthe cylinder cw: is placed .
liquid container ‘connected-in series, a motor for
under pressure which opens the valve p. thnsab vdriving
said compressor, a plurality of cooling
65 lowing thegasj within the cylinder
‘tofy?o‘w'
through the open valve 12 and pipe-p‘Jtoethe-con- ‘
denser where it; is changed into. a liquid-,randre
turned to vtheliquid receiver
This-process
is continued-{until the temperature within
food compartment rc isrechced tofthe.
at'
which the-thermostat (not shown) separates the“.
contacts
S thereby opening the‘ men
gizing cifrcuitvoll'relay R which restores its’ con
tacts I
~2*to ‘normal. The restoration‘ of
75 contact I breaks the circuit for the electric motor
, units,- each having its high pressure end con'—
nected to saidliquid container, an elec'tromag- .
n'etically operated valve, a‘ connection between ‘
said compressor and said valve and connections
between said valve and the‘ low pressure end 01' :
each of said cooling units, means for controlling 70
the operation of one of said cooling units, other
' means for controlling the operation of a second
cooling unit, both said means independentlyco'n
trolling the operation of said motor.
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2. A. refrigerating system, a ?rst cooling unit; a 75
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3
, 2,121,055;
- second cooling unit, a compartment adapted ,to' be:
cooledby said ?rst cooling unit,; a second com
partment adapted to be cooled “by said second
cooling unit, a compressor‘, a valve normally con
necting the low pressure side of said compressor
to one of said cooling units, a connection between
said valve and said other cooling unit, an electro
said second means, said second means being sub
ject to the operation of said ?rst means,
'7. A refrigerating system of the character de
scribed including a cooling unit, means for con
trolling the'operation of said cooling unit, a sec
ond cooling unit, a compressor, a valve normally
connecting the low pressure side of said compres
magnet for operating said valve to connect said ' sor to said ?rst cooling unit, a connection between
othe‘r‘cooling unit to said compressor, an ener
llil gizing circuit for said electromagnet, a pair of
said valve --:,and said second cooling‘ unit, and
thermostatically controlled contacts controlling
means'ior operating said valve to disconnect said 10
?rst cooling unit from and to connect said second
said circuit, one of said contacts being associated
cooling unit to said'compressor, said ?rst means
with each of said compartments, said energizing ' having precedence over and control of said sec
circuit being completed when the contact associ
ond means, and said second means being operable
1% ated with one of said compartments is open and
the contact associated with the other said com
partment is. closed by a rise of temperature be
yond a predetermined degree in said other com
partment.
211i
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8. A refrigerating system of the character de
. scribed including a cooling unit, means for con
' trolling the operation of said cooling unit, a sec
ond cooling unit, a compressor, a valve normally
connecting the low pressure side of said compres 20
sor to said ?rst cooling unit, a connection be
_
3. A refrigerating system of the character de
scribed including a cooling unit, means for con
tween said valve and said second cooling unit, and
' trolling the operation of said cooling unit, a sec
‘ond cooling unit and means for controlling the
operation of said second unit, a compressor, a
2% two-way valve connected to the two controlling
means and normally connecting said compressor
‘so
only when said ?rst means are not operating. ,
means for operating'said valve to, connect‘ said
second cooling unit to said compressor and dis
connect said ?rst unit, said ?rst means being 25
operable at anytime, said second means being
on the low pressure side thereof to the ?rst men
subject to'the operation of said ?rst means.
tioned cooling unit, a connection between said
valve and said second cooling unit, the second
mentioned controlling means being arranged to
scribed including a cooling unit, a second cooling
unit, a compressor, driving means for saidvcom 30
operatively connect said second‘cooling unit to,
and disconnect said ?rstcooling unit from, said
compressor, the ?rst mentioned controlling
9.v A refrigerating system of the character de- '
pressor, a valve normally connecting said ?rst
cooling unit to the low pressure side of said com
preasor, a connection between said valve and said
means having precedence over the second men-' second cooling unit, electromagnetic means ‘for
35 tioned controlling means and having control of operating said valve to_connect said second cool 35
ing unit to said compressor, a circuit for said
‘said second means, said second means being op
erable only when said first means are not operat
ing.
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, electromagnetic means,'an electrical relay opera
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4. A refrigerating system of the character de
40 scribed including a cooling unit, a second cooling
10. In a cooling system, two chambers to be
unit, a compressor, an 'electromagnetically con
cooled, cooling apparatus common to said cham
trolled valve normally connecting the ,low\ pres
sure side of said compressorto said ?rst cooling
unit, a connection between said valve and said
45 second cooling unit, and means for operating said
valve to operatively connect said second cooling
unit to'said compressor.
.
5. A refrigerating system of the character ‘de
‘scribed including a cooling unit, a second cooling
50 unit, a compressor, an 'electromagnetically con
trolled valvenormally connecting the low pres
sure side of said compressor to said ?rst cooling
unit, a connection between said valve and said
second cooling unit,‘ and means for operating said
55 valve to operativelylconnect said second cooling
unit to said‘ compressor and disconnect said'?rst
cooling unit from. said compressor.’
,
tive to control said driving means and interrupt
said operating circuit to cause said electromag
netic means to restore said valve tov normal.
bers comprising a compressor, a condenser and
a liquid container connected inv series, a motor
for drivingisaid compressor, a valve normally
connecting the low pressure side of said com
pressor to one of said chambers, electromagnetic
means ‘for operating said valve to connect said
compressor to said second chamber, a thermo-x
static switch and a relay controlled by said switch
associated with said ?rst chamber for restoring 50
said valve tov normal thereby giving precedence
to said one of said chambers whereby it can use
said common cooling apparatus until said cham- ,
her is cooled.
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11. A refrigerating system, a ?rst cooling unit,- . 55
' _ a second cooling unit, a compressor, avalve nor
6. A refrigerating system of the character de mally connecting the low pressure side of said
scribed including a cooling unit, means forv con! - compressor to said ?rst cooling unit, a connec
60 trolling the operation of said cooling unit, a sec-‘ tion between said valve and said second cooling co
, on'd cooling unit, a compressor, a valve normally unit, an electromagnet for operating said valve to
connect said second cooling unit to said compress
connecting the low pressure side of said compres
sor to said ?rst cooling unitma connection be
tween said valve and said second cooling unit,
65 and means for operating said valve to. disconnect
said first cooling unit from and to connect said
second cooling unit to said compressor, said ?rst
means having precedence over and control‘ of
sor, a circuit for said electrémagnet and a pair of
thermostatically controlled contacts in said cir;
cult, one of said contacts being associated with
‘each of saidcooling units.
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LEROY D.- ELLOGG.
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