close

Вход

Забыли?

вход по аккаунту

?

Патент USA US2518204

код для вставки
Aug- 8, 1950
A. R. THOMAS
2,518,202
VACUUM TYPE WATER ABSORPTION REFRIGERATING SYSTEM
Filed Oct. 25, 1944
4 Sheets-Sheet l
_ _ . _ _ _ _ _____LJ
1
i7
ATTORNEY
Aug. 8, 1950
A. R. THOMAS
2,518,202
VACUUM TYPE WATER ABSORPTION REFRIGERATING SYSTEM
Filed Oct. 25, 1944
,
4 Sheets-Sheet 2
w INV'7ENTOR
Mpg“
@W
-’MW
6%,”17M
ATTORNEY
Aug. 8, 1950
A, R, THOMAS
2,518,202
VACUUM TYPE WATER ABSORPTION REFRIGERATING SYSTEM
Filed 061;. 25, 1944
4 Sheets-Sheet 3
‘ Jig-9m:
i"!
INVENTOR
EM
was5"“ '
4,9‘ dam/am;
ATTORNEY
Aug. 8, 1950
A. R. THOMAS
2,518,202
VACUUM TYPE WATER ABSORPTION REFRIGERATING SYSTEM
Filed 001;. 25, 1944
4 Sheets-Sheet 4
f9
5/
12970?
UNITED sun-:5, "PATENT ‘oi-‘Pica
‘
.
“
,
"
2,518,202
'
“
VACUUM TYPE WATER ABSORPTION
REFRIGERATIN G SYSTEM
Albert R; Thomas, deceased, late of‘Evansvillc,
Ind., by The National City Bank, administrator,
Evansville, Ind., assignor to Serve], Inc., New
‘York, N. Y., a corporation oi’ Delaware
Application October 25, 1944, Serial No. 560,214
16 Claims. (Cl. 62-5)
This invention relates to absorption type re
frigeration systems utilizing water as refrigerant
and operating under partial vacuum.
An object of the invention is to provide such
In the drawings: Fig. 1 shows more or less
diagrammatically a refrigeration system embody
ing the invention; Figs. 2 and 3 are enlarged
views showing in more detail the structure of the
a system utilizing as absorbent a water solution 5 concentration sensing device in Fig. 1; Fig. 4 is
of a solid material such as lithium chloride.
a diagram showing the electrical connections be
tween the concentration sensing device and the
lithium bromide, or the like, and in which de
generator heating control device in Fig. 1; Fig. 5
posit of the solid material does not occur under
any changes that may occur in operating con
shows more or less diagrammatically a system
ditions of the system. Another object is to pro 10' like that shown in Fig. l but having a modified
'vide for liquid circulation and application of heat
solution circuit; Fig. 6 is a view of part of' the
system shown in Fig. 1 provided with a different
in a manner to a?’ord large refrigerating capacity
arrangement for control of the generator heat
with minimum size and amount of apparatus.
A vacuum type water absorption system has an
ing by the concentration sensing device; and
evaporator, an absorber, and a still comprising
Fig. 7 is an enlarged view showing in more detail
a generator or boiler and a condenser. The sys
a portion of the control structure in Fig. 6.
Referring to Fig. l of the drawing, the system
tem contains, by way of example, a water solu
includes a combination generator and vapor
tion of lithium bromide. Heat is applied to the
generator or boiler so that water vapor is ex
liquid lift l0 comprising a shell or jacket I l with
pelled from the solution. The water vapor is 20 in which are a number of riser tubes l2. The
‘lique?ed in the condenser and the water is con
space I3 around the tubes [2 is closed at the
ducted to the evaporator. The pressure is lower
upper end by a plate II; and at the lower end
in the evaporator so the water vaporizes therein
by a plate I5. The open ends of the tubes l2
at a temperature corresponding to the pressure.
project through the plates l4 and IS. The lower
The resulting vapor passes to the absorber where 25 end of the shell H is closed by a plate l6 which
is spaced from the tube plate 15 forming an inlet
it is absorbed into solution. The system is evacu
ated so that the vaporization can proceed at a
header space II.
temperature in the evaporator low enough, for
instance, for cooling air for comfort purposes.
projects into the lower part of an enlarged header
The still operates at a higher pressure than the
evaporator and absorber.
In accordance with the present invention, the
boiler is formed of a number of riser tubes in
a steam jacket and liquid being heated ?ows up
The upper end of the shell ll
or separating vessel l8. Ba?ie plates is are po
sitioned in the separator [8 above the upper ends
of the generator tubes II. The lower part of the
generator tube space I: is provided with a con
densate drain 20.
A steam 'boiler 2| has one or more heating
?ues 22 into the lower end of which is projected
a ?ame of a burner 23. The dome of the steam
boiler 2| is connected by a pipe 24 to the jacket
space I3 of the generator ID. A hand valve 25
and a controlled motor operated valve 26 are pro
circuit through which solution is withdrawn 40 vided in the steam‘ pipe 2|.
The hand valve 25 is normally left open. Steam
from the local absorber circuit and returned‘
flows from the boiler 2| through pipe 24 to the
thereto after expulsion of water vapor from the
jacket space l3 of the generator Ill where it en
solution in the generator. Flow of liquid in the
velops the tubes l2 and heats these tubes to a
branch circuit is caused partly by pressure differ
ential due to the pump in the absorber circuit 4-5 maximum temperature of 212° F. because the
upper end of the Jacket space 13 is open to
and partly by gas lift action in the generator.
atmosphere through a vent 21.
Associated with that part of the branch circuit
The enlarged header or separator 18 at the
which conducts solution from the generator back
upper end of the generator [0 is connected by
to the absorber circuit there is a ‘device for sens
a pipe 28 to a water cooled condenser 29. This
ing the concentration of the solution. The rate
condenser comprises jacketed tubes 30 opening at
of application of heat to the generator is con
one end in a header 3|, and at the other end
trolled by the sensing device so that the solution
in a header 32. ‘The header 32 is divided into
concentration is kept below saturation at tem
upper and lower halves by a partition 33. Cool
peratures encountered throughout the solution
55 ing water enters the lower part of header 32 from
circuits.’
ward in these tubes by a vapor lift action com
monly referred to as a climbing ?lm action. A
pump is provided to cause circulation of absorb
ent solution in a local circuit including the ab
sorber. The boiler or generator is in abranch
2,518,202
.1
..
.
_-
3
\
.
a‘ pipe, 34, i?ows through the lower bank of tubes,
tion or heat, as previously?escribemto the gen
v header 3|, and the upper bank of tubes to the
erator tubes l2 cause expulsion of water vapor
from solution in these tubes. The water vapor
upper part of header 3!, which it leaves through
a pipe 35.
?ows upward in the tubes l2 and causes 8011b;
An evaporator tank 35 is located above an ab
tion to likewise ?ow upward in these tubes. Ad
sorber tank 31. The upper parts of these tanks
are connected by a large conduit 35. The con
jacent the lower ends of the tubes the action is
denser 29 is connected to the evaporator "by
a pipe 45 having‘ a shallow trap 4|, and a deep
pump. ‘1.1115118 upper regions‘ of the: tubes, there
‘ trap 42.
similar to that or an air lift or vapor bubble
is van increasingly larger core of'va’por rising in
The bottom of the evaporator 35 is 10 the center of the tube and dragging upward on
connected by a pipe 43 to the top of the absorber '
- the inner surfaces of the tubes a ?lm of liquid.
31. A manual valve 44 is connected in pipe 43.
The bottom‘of the evaporator ‘35'has .a sump 45
connected by a pipe 45 to the intake of a water
pump 41. The discharge of pump 41 is connect
The vapor and liquid issue from the upper ends
of the tubes I! into the separator l5.
Vapor ?ows from the separator |5 through
pipe 25 to the condenser 23. The condenser
ed by a pipe 48 to the lower end of a cooling coil " ' _ 29 performs the function or liquetying the vapor
by condensation thereof on the tubes 30 which -
or cold radiator 49. The upper end oi’ coil 45
is connected by a conduit 50 to a spray head 5|
are cooled by water ?owing through the con
denser. The condensate, water, ?ows from the
A sump 52 in the bottom of the absorber 31 20 condenser through pipe 45 into the evaporator
is connected by a pipe 53 to the intake of a solu
35. The deep trap 42 in the pipe 40 provides
tion pump 54. The discharge of pump 54 is con
for maintaining a column of water to balance
nected by a pipe 55 to a spray head 55 in the
the di?ference in pressures in the evaporator and
upper part of the absorber 31. A cooling coil
51 is located in the absorber tank 31 below the
Water is circulated from the evaporator 35
spray head 55. The coil 51 has a number of
through pipe 45, pump 41, cooling coil 49, and
sections joined at the bottom by a header 58 and
pipe 55 back to the spray head 5| in the upper
at the top by a header 59. A pipe 50 provides
part of the evaporator. Water sprayed in the
an inlet connection for cooling water to header
evaporator vaporizes to produce a cooling e?ect.
55. The header 59 is connected by pipe 34 to 30 The low pressure for causing this vaporization
the condenser 29 as previously described. The
to take place at a low temperature is maintained
‘bottom of the absorber 31 is connected to the
by operation of the absorber. The vapor formed
separator III at the upper end of the generator
in the evaporator 35 ?ows through the pipe 35
by a pipe 5|. The pipe 5| projects upward with
into the absorber. The vapor is here absorbed
in the upper part of the evaporator 35.
v
condenser.
_
-
'
in the header |8 and the open end of this pipe 35 into the solution and the heat of absorption is
is surrounded by a baille plate 52. The pipe 5|
removed by transfer to cooling water ?owing in
forms a deep trap 53.
.
the coils 51. Absorption liquid is drawn from
A liquid heat exchanger 54 has an outer liquid
the absorber sump 52 and ?ows through pipe.
space 55 and an inner liquid space 55. Pipe 55
53. pump 54, and pipe 55 to the spray head 55
which is connected to the discharge of the solu 40 from which the solution is again sprayed 'over
tion pump 54 is also connected by a pipe 51, the
the coils 51. This forms one branch of the ab
inner space 55 of the liquid heat exchanger, and
sorption liquid circuit.
a pipe 58 to the bottom header H’ of the gen
Another branch of the absorption liquid ‘cir
erator I W.
The bottom of the generator upper
header or separator | 8 is connected by a pipe
59, a vessel 10, a pipe 1|, the outer passage 55
of the heat exchanger, and a pipe 12 to a dis
cuit includes the generator l5. Absorption liquid
is tapped of! from pipe 55 and ?ows through pipe
' 51, liquid heat exchanger 54, and pipe 55 to the
inlet header H of the generator I5. Absorption
liquid from which water vapor has been expelled
?ows from the separator |5at the upper end of
The vessel 10 contains a ?oat 14. By also con
the generator l5 through the pipe 59, the con
sulting Figs. 2 and 3 it will be seen that the ?oat so centration control vessel .15; pipe 1| , liquid heat
14 is connected to a rod 15 which projects
exchanger 54, and pipe 12 to the spray head 13
through an opening’ in the wall of vessel 10.
in the upper part 01’ the absorber 31. The re
The rod 15 is pivoted on a pin 15. This pivot
moval of water vapor from the absorption solu
permits the ?oat to move up anddown. The 55 tion in this branch of the circuit maintains the
opening through which the rod 15 projects
desired concentration of solution'invthe absorber.
through the casing 10 is sealed between the in
The previously described gas lift action in the
side of the casing and the rod 15 by a resilient
generator It causes. circulation of absorption
bellows 11. That part of the rod 15 which pro
liquid in this branch of the circuit at a rate
iects outside of the casing 10 is provided with 60 which varies with the heating of the generator.
a hanger "on which may be placed any de
Pipe 5| provides an over?ow from the sep
sired number of weights 18 to adjust the effective
arator It to the absorber 31. The deep trap
weight of the ?oat 14.- The projecting end of
53 in conduit 5| accommodates a liquid column
the ?oat rod 15 also carries an arm 50 compris
to balance the di?erence in pressures in the gen
ing a movable‘ contact arm for a rheostat 8|. 65 erator and absorber.
Inside of vessel 10, pipe 1| projects upward to
When the concentration of absorption liquid
the top of the vessel, and a baffle plate 82 is lo
?owing through vessel 10 is at the desired value,
cated in front of the opening for pipe 59. The
the ?oat 14 stands in a position such that the
purpose is to reduce effect on the ?oat of ?ow
contact lever 80 is at the center of the rheostat
of solution entering through pipe 59 and leaving
5|. The resilience of the bellows 11 urges the
through pipe 1|.
?oat to this position. If the solution in vessel
The refrigerating system is charged with, by
15 becomes lighter, the ?oat sinks. If the solu
charge conduit 13 located in the upper part of
the absorber 31.
way of example, :a water solution of lithium bro
mide. The refrigerating system is evacuated and
kept evacuated during operation. The applica
tion in vessel 10. becomes heavier, the ?oat rises. ‘
Movement of the ?oat 14 causes the contact arm
50 to move one way or the other from the center
“ abrasion
1-
,
I,
“6
,
“of ‘resistance. M. This causes the steam valve26
1, ‘, solution from v‘the absorber sump v52 ?ows
‘through pipe 93 into the pump vessel 94. The
. to‘be operated. When the ?oatrises. the valve
26‘ is ‘operated to decrease-the supply of steam ‘ pump 35 is‘ submerged in liquid in vessel 94 and
pumps this liquid through pipe I00 into the purge
. vto the generator I0 so that less water vapor will
chamber IOI-. Liquid. ?ows from chamber IOI
‘ be ‘expelled from solution in the generator.
through the pipe I02 to the absorber spray head
‘Fig. 4 is a diagram of the control circuit be
56. Some liquid also ?ows from the purge cham
tween the rheostat 8| and the operating mecha
ber through pipe 61, liquid heat exchanger 64,
nism .of the steam‘ valve 26. The valve 26 is
and pipe 68 to the generator inlet header I1.
operated by a. shaft 83 driven by an electric
Non-condensible gases entering or formed in
the still section of the system are swept by vapor
?ow to the outlet end of the condenser 29-. From
motor revolves in one direction and when the
thence such gases are carried by condensate ?ow
winding 85 is energized the motor revolves in the
ing from the condenser through pipe 40 into the
‘ opposite direction. A second rheostat 86 is iden~
tical with the rheostatBI and has a. contact, arm 15 evaporator .36. The gases are. trapped by liquid
entering the condenser end of pipe 40 due to the
01 moved by rotation of the valve operating shaft
provision of the shallow trap or syphon 4|. The
03. The rheostats 8| and 86 are connected in
trapped gases are carried by the ?ow of liquid
a symmetrical circuit of which one branch in
through pipe 40 into 'the evaporator 36. Non~
cludes a relay coil 08, and the other branch in
cludes a relay coil 89. One side’ o_f,_a source ‘of 20' condensible gases in the evaporator 36 and ab
sorber 31 are swept by vapor ?ow to the lower
electrical energy 90 is connected to .the rheostat
‘ part of absorber 31 from whence the gases are
arm 80 and the’other side is connected to the
drawn through pipe I06 into the liquid entering
rheostat-arm’ 81. When these arms are in the
the intake of the pump 95. The gas ?ows with
centers of the rheostats BI and 86 the symmetri
cal circuits are balanced and the armature SI of 25 the liquid from the pump 95 through pipe I00 to
the purge chamber IOI. The gas accumulates in
the balancing relay is neutral. The armature
the upper part of the chamber IM and when
9| operates a single pole double throw switch
the accumulation is su?lcient, the surface level
92 for connecting one side of the electrical source
of liquid in the chamber IOI is depressed to such
90 to either the motor winding 84 or the winding
motor which has a winding 84 and a second 10
, winding- as. When winding a4 is energized the
85. When the ?oat ‘I4 moves the rheostat arm 00 30 an extent that the ?oat I05 lowers the valve I04
to permit the gas to escape through the vent I03.
one way or the other, the circuits are tempo
To cause removal of gas from the purge chamber
rarily unbalanced, and one winding of the bal
ancing relay overcomes the other to operate the
‘switch ‘92 to start the motoriwhich operates the
I 0|, a vacuum pump may be connected to the
vent I03 and controlled so that the vacuum pump
steam valve. As the motor turns the valve, the 35 operates when the purge valve I04 is open.
In Fig. 6 is shown a part of the system illus
rheostat switch-arm 81 is moved until the cir
trated in Fig. 1, provided with a modi?ed form
cuitsare again balanced and the relay opens and
of concentration control. In this modi?cation,
stops the motor. In this manner, the heat sup
the boiler heating burner 23 is controlled to vary
ply to the generator I0 is controlled responsive
to changes in concentration of absorption solu 40 the supply of steam to the generator I0. A pres
sure operated valve IDS is connected in the fuel
tion in the vessel ‘I0.
,
line to the burner 23. The pressure chamber
The system illustrated in Fig. 5 is generally
H0 of this valve is connected by a pipe III to a
like that described in connection with Fig. l, and
bleed valve H2. The bleed valve is operated by
‘like parts in these ?gures are indicated by the
same reference numerals. In the system of Fig. 45 a rod 'Il3 which projects through the top of a
vertical ?oat vessel II4. A bellows H5 provides
5, the source of steam for heating the generator
a seal between the ?oat vessel H4 and the rod
I0 has been omitted, and the concentration con
II3. A ?oat H6 is fastened on the valve oper
trol device has also been omitted, with the un
ating rod II3 within the ?oat vessel H4. The
derstanding that ‘both would be provided in this
separator I8 is connected by a pipe 69 to the
system in the manner previously described in
?oat vessel H4, and the ?oat vessel is connected
connection with Fig. l, The absorber sump 52
by a pipe 1| to the liquid heat exchanger 64 so
is connectedpy-a' pipe 93 to a vessel 94 containing
that the ?oat vessel II4 contains liquid in its
a centrifugal pump 95. Electric motor 96, lo
path of flow from the generator I0 toward the
cated above the liquid level in vessel 94 is con
nected by a vertical drive shaft 91 to the pump 55 absorber.
Pipe III is connected by a pipe III to a suit
95. The motor 96 is mounted on top of the ves
able source of ?uid under pressure such as com
sel 94, and the drive shaft 9'I_projects downward
pressed air. The pressure of ?uid exerted in
into vessel 94. The drive shaft 91 is provided
valve chamber III) is varied by the amount of
with a labyrinth 98 at the top of vessel ‘94 to pre
vent splashing of liquid into the motor chamber. oo opening of the bleed valve H2. When the con
The motor 96 is located within a casing 99 which
centration of solution in the ?oat vessel H4 is
at the desired value, the bleed valve opening is
is sealed to the pump vessel 94.
The pump 95 is connected by a discharge pipe
such that the boiler heater 23 supplies the de
I00 to a purge chamber IOI. A pipe I02 con
sired amount of heat. Upon increase or de
nects ‘ the purge chamber IOI . to the absorber 65 crease in concentration of solution in the float
vessel II4, the bleed valve H2 is operated by the
‘ spray head 56. The pipe 61 connects the purge
?oat “6 to change the heat input to the boiler
chamber to the liquid heat exchanger 64. The
purge chamber IN is provided with a vent I03
2i accordingly.‘- ~
controlled by a valve I04. A ?oat I05 in the .. ~ ‘ Various changes and modifications may be
.70 made within the scope of the invention asset
purge chamber operates valve IM.
forth in the following claims.
A pipe I06 has one end I0‘! open in the lower
. What is claimed is:
‘
part of the absorber tank 31, and the other end
1. An absorption refrigeration rystem having
I00 open in the intake of the centrifugal pump
an absorber, a generator comprising a vapor
95’. During operation of the system in the man
ner previously described in connection with Fig. 75 liquid lift, a heat exchanger, a vapor lique?er,
.
7
3,518,202
an evaporator, said absorber being'connected in
‘an absorption liquid, circuit with said'generator
and said heat exchanger, said circuit having a
branch by-passing,,sa1d generator, and a liquid
pump for causing now in said branch, said 'hque- '
fier and said evaporator ‘being connected inia re
frigerant course between said generator and'ab
sorber.
2. An absorption refrigeration ‘system having -
a modulating valve for regulating’ the supply
- of heatingm'edium to said generator,‘ and a de
vice responsive to the specinc gravity of the ab
"sorption‘ solution for adjusting the valve in ac
cordance with variations in the concentration of
ti'ie'absorption'solution whereby to maintain the
‘concentration within predetermined limits:
' 9. in an ‘absorption refrigeration system hav
ing a plurality of interconnected elements to
an absorption liquid circuit including an ab- '
provide a‘ closed - circuit for circulating a re~
sorber and a pump'connected to receive liquid
from the absorber and pump it back through the
said circuit for'expelling refrigerant vapor from
‘absorber, a heat exchanger, a vapor liquid lift
1 the absorption ‘solution, means for supplying
connected by means including said heat ex
changer to receive‘ liquid from said circuit and
de.iver liquid to said absorber, a lique?er' con
nected to,receive vapor from said hit, and an
steam to heat said generator, a modulating valve
101' controlling the ?ow of steam to said gen
erator, and a ?oat responsive to the speci?c
evaporator connected to receive liquid from said
liquefler and deliver vapor to said absorber.
3. An absorption refrigeration‘ system having
Irigerant and absorption solution, a generator in
gravity of‘ the absorption solution ?owing from
the generator for adjusting the modulating valve
in accordance with the concentration of the so
ing a gas trap in said circuit, a vent from said
chamber, and a device for opening and closing
lution whereby to maintain the concentration
within predetermined limits.
10. In an absorption refrigeration system hav
ing a plurality of interconnected elements to
said vent responsive to accumulation of gas
provide a closed circuit for circulating a re
a circuit for absorption liquid, a chamber form-v
trapped in said chamber without disturbing ?ow 25 frigerant and absorption solution, a generator in
'of liquid in said circuit.
‘
said circuit for expelling refrigerant vapor from
4. A system as set forth in’claim 3 in which said
the absorption solution, means for heating the
device is a valve operated by a ?oat in said
generator, a modulating valve for regulating the
chamber.
'
heating of said generator, an electric motor for
5. An absorption refrigeration system having 30 adjusting said valve, and a ?oat responsive to
a generator, a heater for heating said generator,
the speci?c gravity of the absorption solution
an absorber, a circuit for absorption liquid in
?owing from the generator for controlling the
cluding said absorber and a pump for causing
‘operation of said motor in accordance with vari
circulation of liquid therein, and a branch cir
ations in the concentration of the absorption
cuit including said generator connected to re
solution whereby to .maintain the concentra
ceive liquid from and return it to said absorber
tion within predetermined limits.
circuit, said generator comprising a heat-oper
11. In an absorption refrigeration system hav
ated liquid circulator to vary the rate of flow
ing a plurality of interconnected elements to
of liquid in said branch in accordance with heat
provide a closed circuit for circulating a re-‘
ing thereof.
40 frigerant and absorption solution, a generator in
6. An absorption refrigeration system having
said circuit for expelling refrigerant vapor from
a generator, a heater for heating said generator,
the absorption solutio , means for heating said
an absorber, a circuit for absorption liquid in
generator, a modulating valve for regulating the
cluding said absorber and a pump for causing
heating of said generator‘; an electric motor for
circulation of liquid therein, a branch circuit
adjusting said valve, an electric circuit for said
including said generator connected to receive
motor including a resistance, and a movable
liquid from and return it to said absorber cir
} member responsive to the speci?c gravity of the
cuit, said generator comprising a heat-operated
absorption solution, said movable member vary
liquid circulator to vary the rate of flow of liquid
ing the resistance of the electric circuit to ad
in said branch in accordance with heating there 50 just said valve in accordance with variations
of, and a device operative responsive to concen
in the concentration of the absorption solution
tration of the absorption liquid to control the
whereby
to maintain the concentration within
heating of said generator.
predetermined limits.
7. In an absorption refrigeration system hav-v
12. In an absorption refrigeration system hav
ing a plurality of interconnected elements to pro 55 ing a plurality of interconnected elements to
vide a closed circuit for circulating a refrigerant
and absorption solution, a generator in said cir
cuit having upright tubes forming vertical heat
ing surfaces for expelling refrigerant vapor from
the absorption solution and raising solution by
vapor lift action, means for heating the generator
tubes, and a device responsive to the speci?c
gravity of the absorption solution for controlling
the vertical extent to which said generator tubes
are heated to maintain the concentration of
the solution within predetermined limits.
'
8. In an absorption refrigeration system hav
ing a plurality of interconnected elements to
provide a closed circuit for circulating a re
irigc-rant and absorption solution, a generator in
said circuit having upright tubes forming vertical
heating surfaces for expelling refrigerant vapor ‘
from the absorption solution and raising the so
lution by vapor lift action, means" for supply 75
ing heating medium to heat the generator tubes,
provide a closed circuit for circulating a re
frigerant and absorption solution, a generator
in said circuit for expelling refrigerant vapor
from the absorption solution, means for heating
said generator, a modulating valve for regulating
the heating of said generator, an electric motor
for adjusting said valve, an electric circuit for
said motor including a resistance, a chamber
connected in said system for receiving concen
trated absorption solution from the generator,
and a ?oat in said chamber responsive to the
speci?c gravity of the absorption solution, said
?oat having a movable arm for varying the re
sistance of the electric circuit to adjust said valve
in accordance with variations in the concentra
tion of said absorption solution whereby to main
tain concentration within predetermined limits.
13. In an absorption refrigeration'system hav
ing a plurality of interconnected elements to
provide a closed circuit for circulating a re
2,518,202
frigerant and an absorption solution, a generator
in said circuit, means for heating said generator
‘to expell refrigerant vapor from the absorption
solution, a valve for controlling the heating of
said generator, an electro-magnetic device for
adjusting the valve to vary the heating of said
generator, a rheostat connected to said device,
and a sensing element in said circuit responsive
to the concentration of the absorption solution
and connected to operate the rheostat and
thereby actuate the valve to adjust the operation
of the generator in accordance with the condi
tion of the absorption solution.
‘14. In an absorption refrigeration system hav
ing a plurality of interconnected elements to ‘
provide a closed circuit for circulating a refrig
erant and an absorption solution, a generator '
culator, a device in the absorption liquid circuit
responsive to the concentration of the liquid
therein to control the rate of heating of said
liquid circulator, a chamber in the absorption
liquid circuit forming a gas trap, a vent from
said chamber, and a device for opening and
closing said vent responsive to accumulation of
gas trapped in said chamber.
16. An absorption refrigeration system having
an absorber connected in a ?rst circuit for ab
sorption liquid including an unheated liquid cir
culator, said absorber also being connected in a
second circuit for absorption liquid including a
heat exchanger and a heated liquid circulator,
and'acourse for refrigerant from said heated
circulator to said absorber including a lique?er‘ 7' ,
and-evaporator.
‘
,
.
in said circuit, means, for supplying steam to said
THE NATIONAL CITY BANK.
generator to heat the absorption solution and
Administrator of the Estate of Albert R. Thomas, E
expell refrigerant vapor therefrom, an adjust 20
Deceased,
able valve for controlling the ?ow of steam to
By JOHN N. EWING,
said generator, and a ?oat in the circuit respon
Vice President.
sive to the concentration of the absorption solu
tion ?owing from the generator and connected
REFERENCES CITED
to adjust the valve whereby to increase -or de- -»
crease the heating of said generator in accord
ance with the concentration of the absorption
solution.
15. In an absorption refrigeration system of the
type which operates in a partial vacuum and in
which non-condensable gases may accumulate. a
circuit for absorption liquid including an ab
sorber and comprising two branches, said circuit
including an unheated liquid circulator and one
of the branches including a heated liquid circu
lator, a circuit for refrigerant from said heated
circulator to said absorber including a condenser
_ and evaporator, means for heating the liquid cir
The following references are of record in the
tile of this patent:
Number
UNITED STATES PATENTS
Name
Date
942,368
1,890,531
2,282,504
2,298,924
2,353,859
2,365,797
2,378,177.
2,384,861
Dyer _____________ __ Dec. 7,
Schurtz .......... __ Dec. 13,
Thomas et a1. ____ __ May 12,
Bichowsky ________ _- Oct. 13,
Thomas __________ __ July 18,
Bichowsb ________ _- Dec. 26,
Bichowsky ______ __ June 12,
Roswell .......... __ Sept. 18,
1909
1932
1942
1942
1944
1944
1945
1945
Документ
Категория
Без категории
Просмотров
0
Размер файла
1 008 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа