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Патент USA US2132292

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Och, 4, 1938.
.
_1l E HAlNE-,s
29Í32,292
STEAM JET REFRIGERATING SYSTEM
Filed Jan. 8, 1936
6
vzveraím" h
Patented ocr. 4,1938
"
i
` 2,132,292
UNITED STATES PATENT oir-‘FICE
STEAM JET REFRIGERATING SYSTEM
John E. Haines, Minneapolis', Minn., assignor to
Minneapolis-Honeywell Regulatorv Company,
Minneapolis, Minn., a corporation of Delaware
Application January 8, 1936, Serial No. 58,120
15 Claims.
This invention relates to refrigerating systems.
and more particularly to that type of system which
utilizes a condenser, an evaporator and an ejector
for accomplishing a. cooling action.
_
An object of this invention is to provide a novel
means for controlling the circulation of the cool-
(ci. frz-_152) ’
pipe I6 to a boiler, not shown. Power i‘luid, which
may take the form of steam, is supplied to the
nozzle box II from a boiler, not shown, through
a steam pipe I1 under the control of a valve I8.
-The valve I8 is moved to an open or closed posi.- 5
tion by a motor I9 which is well known the
ing iluid to and from the evaporator, wherein the ì art.
amount of cooling ñuid ,from the evaporator supplied to the point of use is controlled in accord1o ance with the load on the refrigerating system.
Another object of this invention is to provide a
novel means for controlling the supply of con-densing water to the condenser wherein the
amount of condensing water delivered to the conl5 denser is controlled in accordance with the load.
placed on the condenser.
g
Located inthe evaporator I0 is a spray 20
which is connected by a pipe 2l toa refrigerating
coil 22 located .in an ai-r conditioning unit 23.
The expended cooling ñuid is returned from the lo
cooling coil 22 to the spray 20 `by the pipe 2|
in the direction indicated by the arrow. Chilled
cooling ñuid Ais drawn from 'the evaporator I0
through a pipe 24 by a Circulating Pump 25 and`
delivered by a pipe 26 to the refrigerating e011 l5
22 in the air conditioning unit 23.
Still another object of this invention is to
provide a means for controlling the operation of
the steam jet ejector in accordance with the tem20 perature of the cooling fluid returned to the evaporator, the arrangement being such that if the
temperature of such cooling fluid decreases below
a predetermined value the steam jet ejector is
rendered inoperative.
25 . A further object of lthis invention is to provide
The operation
of the Steam .iet refrigereting mechanism thus. far
described is old in the art and it is suiïlcient to
State that When Steam 1S »Supplied t0 the nozzle .
box l I a vacuum is created in vthe evaporator I0 20
t0 fiaSh the e001ing fluid ÍlOWing fi’Oln the Spray
20 t0v Cause Chilling 0f the Same and lllliSl Chilled
COOling fluid ÍS delivered by the Circulating Dump
25 to the refrigerating coil 22 for cooling the air
Passing thereover.
.
a ‘control mechanism responsive to the temperature of the cooiing num returning to the evap-
Located in the pipe 2G iS a Valve 21 Which is
adapted to be positioned between Open and Closed
orator, for controlling the operation of the 'steam
jet ejector, the operation df the vacuum produc-
Position ISO Centrel the amount 0f eeeling fluid
being delivered to the refrigerating coil 22. The
25
:zo ing means for the condenser and the operation4 of >Valve 2l may be operated by a rack 28 and a 3o
_ the condenser Water circulating means_
pÍl'lÍOIi 29 Which lS TOT/ated ll'l either ClÍIeClSÍOIl by
Another object of this invention is to provide a DTODOrtlOning meter '30 0f the type ShOWn and
a control system embodying the above control described in Patent N0. 1.989.972 ìSSlled t0 LeWiS
means for accomplishing a' complete, accurate,
35 safe and eilìcient control of the refrigerating
mechanjsm_
other objects and advantages will become apparent to those skilled in the art upon reference
to the accompanying speciñcation, claims and
40 drawing, in which drawing:
,
Figure 1 illustrates one form of my invention as
applied to a refrigerating system utilizing a 're~ lfrirrerotinr coil 1ocated in en. oir conditioning
unit, and
45
y
-
Figure 2 illustrates another form of my inven-
L. Cunningham on February 5, 1935. The motor
30 may besuitably heldin Position by meansßf 35
a bracket 3|. The motor 30 may be operated by
a temperature controller generally designated at
321 Which is .responsive t0 the temperatul‘e 0f
the cooling iluid returning to the evaporator or 'by
a temperature controller 33 responsive to the 40
temperature 0f the ail' ñowing Over the refirie-4
Hating C011 22~
‘
The temperature controller 32 may comprise e
bellows 34 connected by a capillary tube 35 to a
bulb 36 containing a volatile ñuid and located 45
tion which utilizes a spray located in an air con-
in intimate e0ntaei`» With lille Cooling fluid ,re
ditioning unit.
For a more thorough understanding of my in-
turning to the evaporator. Upon an increase in
cooling fluid temperature the bellows 34 ls ex
‘ vention reference is made speciñcally to Fgure 1, panded to move a slider 3l upwardly with re
50 wherein there ls diagrammatically shown an evap- spect to a potentiometer coil 38. Upon a de- 50
orator I0 connected to anozzle box II, which in crease in cooling ñuid temperaiilre the Slider 3l
turn is connectedby an oriñced jet I2 to a con- fis moved downwardly with respect to the poten
denser I3; Condensed fluid is drawn from the tiometer coil 38. The slider 31 is connected by a
condenser I3 through a conduit I4 by a vacuum wire 39, a manual switch d0 and a wire 4I to the
55 or discharge pump ~I5 and delivered through a
proportioning motor 30, and the upper and lower 55
..2
(
ends of thevpotentiometer coil 38 are connected
to'the proportioning motor 30 by means‘of wires
42 and 43 respectively.
.
2,132,292
-a
,
‘
'
The temperature controller 33 located in the
air conditioning unit 23 may comprise a bimetal
lic element 44 for operating a slider 45 with re
spect to a potentiometer coil 46. The slider'45
is connected by a wire 41, a manual switch 48
the conduit 26 and the return conduit 2| is pro
vided and this by-pass includes a pressure relief
. valve 55 so that when .the valve'21 is moved to
wardsv a closed position and the pressure builds
up in the conduit 26 this excess pressure may be
vented to the return conduit 2| through the pres
sure relief valvev 55.
By reason of the construc- ’
tion outlined above, an extremely accurate _tem
perature control of the cooling fluid is obtained
- and a wire 49 to the proportioning motor and the
10 left and right ends of the potentiometer coil 46 _ and safe operation of the cooling portion of the 16
e are connected by wires 50 and 5|, respectively, to» refrigerating system is, assured. Y
the proportioning motor 38.
Referring now to Figure 2, I have shown my
With the manual switch 40 in a closed position . invention as applied to a spray 56 located in an>
and the manual switch 48 in an open position, as lair conditioning unit 51. Cooling fluid is deliv
15 shown in Figure 1, the temperature controller 32
ered to the spray 56 from the evaporator Il! ll.
controls the operation of the proportioning motor through a pipe 58, a three-way valve 59~and a
„310 so that upon an increase in _the temperature Vv‘pipe 60. The expended cooling fluid is withdrawn
0f the cooling fluid returning to the evaporator from the air conditioning unit 51 through a pipe
the proportioning motor 30 is operated to move 6| by a circulating -pump 62 and returned by a
20 the valve 21 toward an open position to admit Jpipe 631m the spray 28 in the evaporator I0. A
more cooling ñuid to the refrigerating coil 22 by-pass pipe 84 connects the return pipe 63 with
in the air conditioning unit 23 to increase the :the three-way valve 59 and the three-way valve
cooling effect of the refrigerating coil 22 on the 59 may be operated throughA a rack 65 and a pin
air passing thereover. Likewise, upon a decreasel ion 86 by a proportioning motor 61 in all respects
25 in temperature of the cooling fluid returning ,to the same as the proportioning motor 38 of Fig
the `evaporator the slider 31 is moved down
ure 1. The proportioning motor 61 may be suit
wardly with respect to the potentiometer coil 38
to operate «the proportioning motor 38 in the op
ably mounted on a bracket 68 and power may be
l fluid being delivered to the refrigerating coil 22.
delivered to the proportioning motor 61 by line
wires 69 and '18 leading from some source of
power, not shown. The circulating pump 62 may
be connected across'the line wires 69 and 10 by
Preferably the returning cooling fluid is main
4wires 1| and 12, respectively. The proportioning
tained at 60°. With the manual switch 40 in an
motor 61 may be controlled by a temperature con
troller 13 which may comprise a bellows 1.4 con
nected by a capillary tube 15 to a bulb 18 con
so
posite direction to move the valve 21v toward a
closed position to decrease the supply ofßcooling
y open position and the manual switch 48 closed
35 the temperature controller 33 is placed in’control
of the proportioning motor 30 and upon an in
crease in the temperature of the air passing
through the conditioning unit 23 the slider 45 is
taining la volatile fluid and located in intimate
contact with the cooling fluid returning to the
evaporator through the return pipe 63. The bel-
`
moved to the left `in the direction indicated by y lows 14 is adapted to operate av slider 11 with
the character H to cause operation of the pro
respect to a potentiometer coil 18. The slider 11
portioning motor 38 to move the valve 21 towards
an open position to supply more cooling'iluid to
_ the refrigerating coil 22.A
Likewise, upon a de
crease in temperature of the air passing through
the air conditioning unit 23 the slider 45 is moved
towards the right in the direction indicated by
the character C to operate the proportioning
motor 30 in the opposite direction to move the
valve 21 toward a closed position to decrease the
50 supply of cooling fluid to the refrigerating coil
22. In each instance thevamount of cooling ñuid
delivered to the refrigerating coil 22 is propor
tioned in accordance with the temperature
changes of the cooling fluid returned to the evap
65 orator, or of the air passing through the air con
is connected by a wire 19`to the proportioning
motor 61 and the upper and lower ends of 'the
potentiometer coil 18 are connected by wires 88
and 8| to the proportioning motor 61. The ar
rangement is such that upon an increase in tem-~ 45
perature of the cooling fluid returning to the
evaporator, the slider 11 is moved upwardly with
respect to the potentiometer coil 18 to operate
the proportioning motor „61 to move the three
way mixing valve 59 toward a position where more 60
cooling fluid isdelivered from the conduit 58 an'd
less return cooling fluid is Adelivered from the
conduit 64 to the spray 56', whereby the tem
perature of the spray is decreased to increase the
cooling effect of the spray. Likewisè, upon a
ditioning unit 23. Power is supplied to the pro . decrease in temperature of the cooling fluid re
portioning motor 38 for performing the controlv turning‘tothe evaporator, the slider 11 is moved
downwardly with respect to- the potentiometer coil
function by means of line wires 52 and 53.
18 to operate the proportioning motor 61 in the.
It will be seen that if the valve 21 is moved to
a completely closed position, the circulation of lopposite directionlto supply more return cooling 60
cooling `fluid through the refrigerating coil 22 fluid and less chilled cooling fluid to the spray
would be stopped and, therefore, there would be 56. In each instance the amount of return cool
no flow of cooling fluid past the bulb 36 of. the ing fluid and the amount of chilled cooling fluid
temperature controller 32. In order to insure a is proportioned according to -tlie temperature of
65 continued flow of a minimum amount of cooling the cooling fluid being returned to the evapo
fluid past this bulb 36 a by-pass around the valve rator. In this manner, the temperature of the A
21 is provided-at 54. This by-passaround the returning spray water is maintained at the de
valve 21 permits a small flow of cooling fluid to sired value, preferably 60°.
circulate through the cooling portion of the sys
Referring again to Figure 1, condensing fluid
70 tem so that the temperature controller 32 will be is discharged from the condenser |3 through a.í
able to respond to the temperature thereof, and, »pipe 83 and is suppliedl to the- condenser I3
therefore, respond readily to changes in temper -through a‘pipe 84 under the control of a valve
85. The valve 85 is positioned between an open
ature in the cooling `fluid.
'
In order to prevent the building up of undue and closed position by a rack 88 and a pinion 81
pressures in the conduit 26 a by-pass between which is operated by a proportioning motor 88 l“75
3
2,132,292
which may be identical with the proportioning limit control generally designated at If|2 which
motor 30. The proportioning motor' 88 may be « may comprise a bellows -| I3 connected by a capil
mounted on a suitable bracket 89.
Power is sup
plied to the proportioning motor 88 by line wires
90 and 9| leading from some source of power, not
shown. The proportioning motor 88 may be op
erated by a temperature controller generally des
lary tube I|4 to a bulb ||5 containing a volatile
fluid and located ‘in intimate contact with the
cooling fluid being discharged from the evap
orator.
The bellows ||3 operates a lever ||8
ignated at 93. The temperature-controller may
which carries a mercury switch | I1, the arrange
ment being such that when the temperature of
comprise a bellow 94 connected by a capillary
`the chilled coolingñuid decreases to a predeter
10 ,tube 95 -to a bulb .96 Icontaining a volatile iluid Y mined low value, say 38°, which might cause 10
and located in intimate contact with the dis
charge fluid being discharged from the condenser
I3. The bellows 94 operates a slider 91 with re
spect to a potentiometer 98. The slider 91 is
15 connected to the proportioning motor 88 by -a
Wire 99 and the upper and lowerends of the po
tentiometer coil 98 are connected by wires |00
and IOI, respectively, to the proportioning motor
freezing up .of the refrigerating system the mer
cury switch ||`| is moved to a circuit breaking
position.
\
-
A relay coil is designated at ||9 and is adapted
to control the operation of switch arms | 20, |2|
'and |22. Upon energization of the relay coil H9.
the switch arms |20, |2| and |22 are moved into
engagementrwith contacts> |23. I 24 and |25, re
spectively„and upon deenergization of the relay
88. The arrangement is such that upon an in
20 crease in temperature of the condensing fluid
coil ||9 the switch arms |20, |2| and |22 are,
being discharged from the condenser I3, the
slider 91 is moved upwardly with respect to the
moved out of engagement with their respective
contacts and the switch arm |20 is moved into
potentiometer coil 98 to move the valve 85 towards
an open position, whereby an increased supply
of cooling fluid is supplied to the condenser |3.
Likewise, Iupon an increase in temperature dis
charging from the condenserl |3 the slider 91 is
moved downwardly with. respect to the poten- A
20
engagement with a contact |28, this last move
ment being accomplished by springs, gravity or
other means, not shown. When- the mercury
switches ||| and ||1 of the temperature con
trollers- |06 and ||2, respectively, are moved to
a circuit making position a circuit is completedI
from the line wire _62 through wire |21, relay
coil H9, wire |28,_mercury switch |||, wire |29,
densing iluid‘4 being delivered to the condenser mercury switch ||1 and wire |30, back to the
I3. In this manner, the amount of condensing . other line wire 53. This causes energization ofv
Afluid delivered to the condenser I3 is controlled the relay coil || 9. If the temperature of the
in accordance with the load on the condenser I3 cooling fluid returning to the evaporator I0 should i
so4 that a substantially constant condensing ac
decrease to a predetermined value indicating that
tion` is maintained within the condenser |3. no more cooling »is required, the mercury switch
Preferably, the temperature .of the condensing ||| is -moved to a circuit breaking position to
tiorneter coil 88 to move the valve 85 towards‘a
00 -closed position to decrease the amount of con
fluid being discharged from the condenser is
deenergize the relay coil ||9. Likewise, if the
temperature of the chilled cooling fluid emanat
It is apparent that at times the vvalve 85 ma
ing from the evaporator |0 should decrease to a 40
be moved to a completely closed position-and in- predetermined low value which wouldl indicateY‘order to maintain some condensing fluid in the that the refrigerating mechanism may freeze up,
condneser | 3 and to pass some condensing fluid the mercury switch ||1 is moved to 4a circuit
past the bulb 96 when the steam jet refrigerat
breaking'position to `also deenergize the relay
,
45
45 ing mechanism is in operation, a by-pass |02 is coil ||9.
provided around the valve 85. The by-_pass |02
Movement of the switch arm |20 into engage
is controlled by a valve |03, which in turn is ment with the contact |23 completes a circuit
opened and closed by a'solenoid |04, the ar ' from-the line wire 53 through wire |3I, switch
rangement being suchy that when the solenoid arm |20, contact |23, wire |32, valve motor I9
maintained at 106°.
.
.
50 |04 is energized the valve |03 is moved to an
open position. The valve |03 is maintained in
an open position as long as the steam jet refrig
erating mechanism is maintained in operation in
, a manner to be pointed out more fully hereafter,
so that when the steam jet refrigerating mecn
and wire |33 back to the other line wire 52.
Completion of this circuit causes operation of 50.
the valve motor I9 to move the valve |8 to an
open position to- supply steam to the steam jet
ejector refrigerating mechanism. Movement of
the switch arm |20 into engagement with the 55
anism is in operation a supply of condensing fluid ' contact _|26-upon deenergization of the relay coil
to the condenser | 3 is assured. 'I'he by-pass I 02
also renders more accurate the response or the
temperature controller 93 to changes in condens'
60 ing fluid temperature since it causes some con
densing fluid to flow past the bulb 96.
`
-'lî‘his invention contemplates the use of a tem
perature controller generally designated at-|06
which may comprise a b'ellows |01 connected by
55 a capillary tube |08 to a bulb |09 containing a
volatile fluid and located in intimate contact with
>the cooling fluid being returned to the evapo
rator I0 through the conduit 2|. The bellows
|01 is adapted to operate a lever ||0 which car
70 ries a mercury switch | | I, the arrangement being
such that when the temperature of‘the cooling
iluid returning to the evaporator decreasësvto a
predetermined low value, say 58°„the mercury
switch ||| is moved to a circuit breaking position.
This invention alsocontemplates the use of a
||9 completes a circuit from the line wire 53,
through wire |3|, 4switch arm I 20, contact |26, ‘
wire |34, valve motor I9 and wire "|33 ‘back to
the other line wire 52 to cause operation of the 60
valve motor |9 in the opposite direction to move
the valve I8 to a closed position to prevent the
further supply of steam to the steam jet refrig
erating mechanism. In this manner, thel steam
jet refrigerating mechanism is maintained in op 65
eration but if the temperature of the cooling fluid
returning to the evaporator should decrease to
a predeterminedlow temperature, or if the, tem
perature of the chilled cooling fluid discharging
from the evaporator I0 'should decrease to a 70
predetermined lower temperature the steam jet
lrefrigerating mechanism is shut down.
‘
Movement of the switch arm |2| into engage-`ment with -the contact |24 completes a circuit
from the line wire 53, through wire |38, contact 76
'2,132,292
~4
|21, switch arm vlz l, wir@ |31, manual switch las,
ation upon a demand for cooling by supplying
-wire |38, solenoid |04 and wire |40 back to the
steam to the reirigerating mechanism/and by
other line wire 52.,- Therefore, when the refrig
operating the vacuum creating means and the
circulation of condensing fluid through the con
denser I3 is assured when the .steam jet refriger
ating mechanism is placed or maintained in
erating mechanism is placed or maintained in
operation the solenoid valve |04 is energized to
open the by-pass |02 to assure that condensing
iluid will be circulated through the condenser
||3.
operation.
>
« Although I have disclosed for purposes of illus.- ,
f
Movement of the switch arm |22 into engage
tration various forms of my invention, other
10 ment with the contact |25 completes a. circuit - forms thereof may become apparent to those 10
from the line wire 53, through wire |42, Contact skilled- in the art and, consequently, my invention
|25, switch arm |22, wire |43, electrically oper
ated vacuum pump I5 and wire |44 pack to the
other line wire 52. Completion of this circuit
causes operation of the vacuum pump I5 to create .
a vacuum in the condenser I3. Therefore, when
> the steam jet refrigerating mechanism is placed
or maintained in operation the vacuum pump' I5
is operated to create and maintain a vacuum
within the condenser I3.
-
If it be desired to control the by-pass valve
|03 in accordance with the movement of the
steam valve' I8 the manual switch |38 may be
moved to an open position and a manual switch
|48 may be moved to a closed position. There
fore, a circuit 'may be completed from the line f
is to be limited only bythe- scope of the appended
claims and the prior art.
I claim as. my invention:
1. In a reiriger'ating system having an evapo
1K
rator, ejector and condenser, the combination of
means for'controlling the supply oi’ condensing>
ñuid to the condenser, means for circulating cool
ing> iiuid through the evaporator for chilling the '
same, and means responsive to the temperature 20
of the cooling fluid returning to the evaporator
for_controlling the condensing ñuid supply con
trolling means.
‘
„
f
2. In a refrigerating system having an evapo
rator, ejector and condenser, the combination of
-means for supplying condensing iluid to the con
wire 53,` through wires |36, |46 and |41, manual
denser, a valve in- `control of the supply oi' con
switch |48, mercury switch |49'carried by a lever densing iiuid to the condenser, thermostatic
|50 operated vby the valve motor I9,” wires |5I, v means responsive to the temperature o! the con
|52 and |39, solenoid |04, and wire |4_0 back to
the other line wire 52, The mercury switch |49
densing iiuid discharged from the condenser for -30
pipe Il for operating a lever |59 which carries
The circuit is continued
from the mercury switch |55 through wires |60,
densing iluid to the condenser, .thermostatic
`modulating the valve to controly the condensing
is tilted to a circuit making position whenever action of the condenser,` a by-pass around said
the steam valve I8 is moved to an open position valve, a second valve in control oi' said by-pass,
to complete the above circuit._ Therefore, the means for circulating cooling fluid through the
solenoid |04 may be energized in direct response evaporator for chilling the same, and means re 35
to the opening movement of the steam valve I8 so sponsive to the temperature of the cooling ñuid
that the circulation oi condensing iiuid through returning to the evaporator for controlling said
l
¿
the condenser |3 is insured when the steam jet second valve.
3. In a. refrigerating system having an evapo
refrigerating mechanism is placed in operation.
If it be desired to operate the by-pass valve rator, ejector and condenser, the combination of 40
means for circulating cooling ñuid through the
|03 associated with the condensing ñuid in ac
cordance with the actual supply vof steam to the evaporator, means for controlling the supply of
steam jet refrigerating mechanism, the manual condensing ñuid to the- condenser, means for
switches |38 and |48 may be moved to an open controlling the supply of power iluid to the
position and a manual switch |54 may be moved v ejector, and means responsive to the temperature
45
`to a closed position. These movements of the of the cooling ñuid returning to the evaporator
manual switches complete a circuit from the line for controlling the condensing iluid controlling
wire 53, through wires |36, |46 and |53, manual means and the power fluid controlling means.
y4. In a refrigerating system having an' evapo
switch |54, mercury switch |55, operated by a
pressure controller |56 which may comprise a rator, ejector -and condenser, the combination of
ymeans forl supplying condensing fluid to the con
' the mercury switch |55.
|52 and |39, solenoid |04 and wire |40, back to
the other line wire 52. The arrangement is such
that when steam is supplied to the steam jet
ejector refrigerating mechanism the bellows |56
is expanded to move the mercury switch |55 to a.
denser, a valve in control of the supply of con
`means responsive to the temperature oi' the con
densing fluid discharged from the condenser for
modulating the valve to control the condensing
action of the condenser, a by-pass around said
valve, afsecond valve in control of said by-pass,
means for circulating cooling ñuid through the
circuit making ~position to complete the above
evaporator for chilling the same, means for con
circuit to energize the solenoid |04 to open the
by-pass valve |03 and thus insure the circulation
trolling the supply of steam to the ejector, and
means responsive to the temperature of the cool
ing fluid returning to the evaporator for con
of condensing ñuid -through the condenser I3
when steam is being supplied> to the steam jet
ejector refrigerating mechanism.
,
-
From the above, it is seen that I have pro
vided a control system for a steam jet refriger
ating mechanism which provides accurate and
safe control thereof. The supply oi cooling ñuid
70 to a point of use is accurately` controlled in ac
cordance with a demand for cooling, the supply
of condensing iiuid to the condenser is accurately
trolling the steam control means and the second
valve.
"
5. In a refrigerating system having an evapo
rator, condenser and ejector the combination of
means for circulating cooling fluid through the
evaporator, means for controlling the supply oi
condensing fluid to the condenser, means for
creating a vacuum in the condenser, and means
responsive to the temperature of the cooling fluid
controlled in accordance with the load on the ' returning to the evaporator for controlling the
condenser, the steam jet refrigerating mechanism
76 is automatically placed and maintained in oper
condensing i‘luid controlling means and the
vacuum creating means.
75
d
2,132,292
6. In a refrigerating system having an evapo
rator, ejector and condenser, the combination of
means for supplying condensing iluid to the con
denser, a valve in control of the supply of con
c
5
,
Y
'
trolling the valve and the vacuum creating means.
11. In a refrigerating system having an evap
orator, ejector and condenser, >the coní'aination
modulating the valve to control the condensing
of means for circulating cooling iluid between the
evaporator and a point of use, a valve in control
of theviiow of cooling iiuid to the point of use,
means for controlling the supply _of condensing
ñuid to the condenser, and means responsive to
action of the condenser, a by-pass around said
the temperature of the cooling fluid returning to>
densing fluid to the condenser, thermostatic
means responsive to the temperature of the con
densing fluid discharged from the condenser for
10 valve, a second valve in control ci said by-pass, the’ evaporator for controlling the valve and the
.
`
means for creating a vacuum in the condenser,` condensing fluid control means.
means for circulating cooling iluid through the
l2. In a retrigerating system having> an evapo
evaporator for chilling the same, and means' re
rator, ejector and condenser, the combination oi'
10
means for controlling the circulation oi' cooling
iiuid between the evaporator and a point oi use,
c. vacuum controlling means and said second valve. ~ means for controlling the operation of the ejector,
means for controlling the operation of the con
7. In a refrigerating system having an evapo
rator, condenser and ejector the combination of denser and means responsive to the temperature
means for circulating cooling iiuid through the of the cooling iluid returning to the evaporator
20 evaporator, means for controlling the supply of for controlling the cooling iluid controlling means,
condensing iluid to the condenser, means for the ejector controlling means and the condenser
‘
g
creating a vacuum in the condenser, means for controlling- means.A
13. In a reirigerating system having an evap
controlling the operation of the ejector, and
sponsive to the temperature of the cooling fluid
15 returning to the evaporator for controlling said
15_
means responsive to the temperature ci' the cool- ` orator, ejector and condenser, the combination
of means for controlling the circulation of cooling 25
25 ing iiuid returning to the evaporator for con
trolling „the condensing iluid controlling means,Í . ñuid between the evaporator and a point of use.
the vacuum creating means and the ejector con
trolling means.
'
.
-
' 8. In al refrigerating system having an evap
30 orator, ejector and condenser, the combination of
means for supplying condensing iluid to the con
denser, a valve in control of the supply of con
densing iluid to the. condenser, thermostatic
means responsive to the temperature of the con
densing iluid discharged from the condenser for
modulating the valve to. control the condensing
action of the condenser, a by-pass varound said
valve.' a second valve in control ot said by-pass,
means f_or creating a vacuum in the condenser,
40 means for controlling the operation of the ejector,
` means for circulating cooling fluid through the
- evaporator i'or chilling the same, and means re
sponsive to the temperature o! the cooling nuld
returning to the evaporator «for controlling said
means for controlling the operation oi' theejector,
means for controlling the supply of condensing
fluid to the condenser, means for creating 'a vac
uum in the condenser, and means responsive to
the temperature of the cooling iluid returning to
the evaporator for controlling _the cooling iluid
controlling means, the ejector controlling means,
the vcondensing iiuid controlling means and the .
vacuum creating means.
14. In a refrigerating system having an evap
orator, ejector andcondenser, the combination _
of means for controlling the supply of condensing
fluid to the condenser in response to the temper
ature of the condensing iluid leaving the con
denser, means for controlling the circulation of
cooling iluid from the evaporator in response to
`the demand for cooling, and means responsive to
the -temperature of the cooling iluid returning to
vacuum -controlling means, said second valve andv the evaporator for controlling the operation of the
the ejector controlling means.
ejector, the vacuum in the condenser and the sup
` A 9. In a refrigerating system having an evapo
rator, ejector and condenser, the combination oi'
means for circulating cooling fluid between the
ply of condensing fluid.
'
15. In a rei'rigerating system having an evapo--
rator, ejector and condenser, the combination of
evaporator and a point of use, a valve in control means for controlling the supply of condensing
of the iiow oi' cooling fluid to the point of use,_ - iluid to the condenser in response to the temper
» means for controlling the operation of the ejector, ature of the condensing iluid leaving the con
and means responsive to the temperature of the denser, means for controlling the circulation of
cooling iiuid returning to the evaporator for Lcooling ñuid from the evaporator in response to
‘controlling the valve and the ejector controlling the demand for cooling. means responsive to the
means.
l0. In a retrigerating system having an evap
orator, ejector and condenser, the combination
oi' means for circulating cooling fluid between the
evaporator anda point of use, a valve in control
of the ilow oi’ cooling iluid to the point of use,
means i'or creating a vacuum in the condenser,
and means responsive to the temperature of the
cooling iiuid returning to the evaporator for con
temperature of -the'cooling fluid returning td the
evaporator for controlling the supply of steam
to the ejector and for controlling the vacuum in
the condenser, and means responsive to the sup
piying o! steam ,to the ejector for additionally
controlling the supply of condensing ñuld to the
condenser.
_
_
JOHN E. HAINB.
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