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Патент USA US3075306

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Jan. 29, 1963
A. M. STONE
3,075,296
VAPOR CONDENSING CLOTHES DRYER WITH
PULSED-FLOW CONDENSER
Filed Sept. 28, 1960
2 Sheets-Sheet 1
F‘Ghi
INVENTOR.
AIDAN M. STONE
HIS ATTORNEY
Jan. 29, 1963
3,0752%
A. M. STONE
VAPOR CONDENSING CLOTHES DRYER WITH
PULSED-FLOW CONDENSER
Filed Sept. 28, 1960
2 Sheets-Sheet 2
53
S5
AIDAN
BY
M
INVENTOR.
STONE
W Z
HIS ATTORNEY
_,
United States Patent 0 " ice
vention, however, both as to organization and method of
operation, together- with runner" objects and advantages
3,075,296
thereof, may'best be'understood by reference to the fcl-’_
lowing description taken'in conjunctionwith the’ accom
VAPOR CONDENSING CLOTHES DRYER WITH
PULSED-FLOW CONDENSER
Aidan M. Stone, Louisville, Ky., assignor to General
Panying
Electric Company, a corporation of New York
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of a combination washer'wash‘er' drayer in which my new
and improved arrangement is used, the view being par;
tially broken away'and partially in section in‘ order. to
This invention relates to a clothes drying machine and
more particularly to such machines in which cold water I 10
washer dryers since myv invention may be applied to both,
drawing-S‘.
In the drawings, FIGURE 1 is a rear elevational view
Filed Sept. 28, 1960, Ser. No. 58,935
3 Claims. (Cl. 34-75)
is ?owed down a wall of the drying chamber in the drying
operation to condense‘ the moisture extracted from the
clothes.‘ It will be understood that by clothes drying ma
chines are ‘meant both clothes dryers and combination
Patented Jan. v2.9,z
2
1
‘
3,075,296
illustrate
details;
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FIGURE 2 is" a side elevational view of‘ the machine
of‘ FIGURE 1 with the side panel removed; and
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"FIGURE 3' is an enlarged fragmentary‘ cross sectional
view of a portion of- FIGURE 2.
15
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Referring, now to FIGURES 1, 2 andv 3 and. initially
more particularly to' FIGURE 1, there is shown a com
and is in tact described in detail hereinafter as applied to
a combination washer dryer.
bination clothes washing and drying machine of the
domestic type wherein? the operating elements of the ma
Toqobtain good ‘drying’ results in a machine in which
coldwater is flowed down a side of the drying chamber to
chine are includedv in an outer cabinet structure having a
found that one effective way of making the water spread
out ‘over the wall and thereby provide the desired large
top 3. on which is supported a backsplash’ panel 4 which
may,‘ as shown, be mounted on posts 5. Control panel
wrap-around section 1. Section 1- is supported»v
act as a moisture vcondensing medium, it is desirable that 20 central
on a base and toeboard- assembly 2. and carries a separate
the cold water’cover as large an area as possible. I have
4 is generally'provided-with appropriate devices 6'for'pr'o
condensing area is to cause the water to ?ow at a relatively
high rate; However in the interest of economy, because 25 viding manual. control. of. the various types of washing
and drying sequences. Access to the interior. of the ma
the drying operation continues for a substantial period of
chine maybe provided through, an opening 7 formed in
time during which flow takes place, the overall rate of ?ow
must necessarily be kept low.
trap-around section 1, the opening being normally closed
during. operation by‘ a suitable door structure (not
an improved arrangement for introducing condensing 30 shown).
The machine is, of the horizontal axistype, that is, it
liquid at a relatively high rate without increasing the total
has. a substantially cylindrical clothes basket or receptacle
consumption of the liquid.
8 mounted, forfrotation on a generally. horizontal axis
More speci?cally, it is an object of my invention to
within
an. outer enclosing, tubv structure 9. Basket 8
achieve this desired result by providing intermittent con~
densing liquid ?ow in which the liquid enters in separated 35 comprises a cylindrical shell; or, wall 10 having perfora
' Accordingly, it is an object of, my invention to provide
tions 11 therein and, which is closed at its rear end by
pulses. In this manner, a relatively low inlet ?ow may be
means ot a suitable wall or plate 12. Wall 12 may, as
used by brie?y storing the water and, then discharging it
rapidly onto the wall of the condensing chamber.
A further speci?c, object of my invention is to achieve
the pulsed ?ow effect by providing a siphon which dis
charges the cooling‘ liquid from a receptacle into the cham
shown, be provided with a, double thickness for increas
ing its structural strength, The tub, 9,, in similar fashion, '
has. an. imperforate substantially cylindrical wall 13, a
rear wall 14, and an appropriately formed front wall
(not shown), andprovides the washing and drying cham
ber, the siphon having ‘a ?ow capacity higher than the ?ow
ber forthe machine. The basket, is rotatably supported by I
input to the receptacle.
a shaft 15, which is secured to double wall 12v and is‘.
In carrying out my invention, I provide a clothes dryer 45 mounted, in, an elongated bearing 16. supported between .
which has an imperforate tub with walls de?ning a drying
rear.wall_14 and an, auxiliary rearwall 17 of the tub 9.
chamber and with clothes tumbling means disposed with
The tnbandbasket are appropriatelyformed at. their front
in the chamber. The clothes are heated as they tumble
portions so as to permit access through the. opening 7
within the chamber so as to_ cause moisture to be extracted»
into
basket for. the insertion and. removal of. clothes;
therefrom by evaporation. In order to remove this mois~ 50 This the
feature is conventional in the art, does‘ not form part
ture from the air, 1 cause cooling liquid to flow down a
of this invention, and is therefore; not’ shown’ in: detail‘
portion of the, interior of the chamber walls, the moisture
being condensed out of the air by contact with the cooling
liquid. This latter structure includes a container together
with means for introducing cooling liquid into the con
tainer at, a relatively low rate and a siphon which leads
out of the container and which has a ?ow capacity sub
herein.
55
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Referring now, particularly, to FIGURE 1, during the
operation, of; the machine the basket 8._' is drivenfrom an
electric motor/1,8. The, drive from the motor to the basket
includes; a‘ pulley. 19 which is. secured to .' the motor, shaft
so as. to, rotatewtherlewith‘ and over~ which passes a belt
stantially higher than the rate of flow into the container.
29. Belt/2,0 ‘drives, an‘adjus'table. sheave, assembly 2].
With this arrangement, the container ?lls up gradually,
of. the type’, which is well known for use in, achieving
and then when the liquid‘ level rises to the top of the 60 variable,
output ‘speeds from a, constant input speed
siphon, the siphon discharges the container contents into
source. The adjustable sheave assembly in turn operates
the chamber at a high rate. In this manner, inseparated
a'belt; 22 to cause, rotation ‘of pulleys 23, and 2.4. I The
pulses, the cooling liquid is introduced. It has been found
rotation of pulley, 24 is, passed ‘on through, a,v belt 26 to
that this intermittent high ?ow achieves a more effective
a pulleyg25, which is secured on basket shaft‘lSf In
heat transfer between the condensing liquid and the moist 65 this manner, the motor18 may be driven at a'constant
air. In addition to the foregoing structure, I make the
conventional and necessary provision of suitable means
for conducting the cooling liquid and the condensed mois
speed,‘ and,‘ through the adjustable‘ sheave assembly/2'1, ‘
the speed imparted to pulley '25 ‘and, basket ‘Sfmay be]
varied so gasto' provide an appropriate range ‘of speeds for
the basket.‘ For instance, ‘for tumbling purposes dur
The particular subject matter which I regard as my in 70 ing the washing andrinsing operation,'and also during the
heat drying operation, a speed of approximately 47 ‘rpm.
vention is particularly pointed out and distinctly claimed
may beprovided-to. the basket 8, and a centrifuging speed.
in the concluding portion of this speci?cation. The in
tu're out from the chamber to drain.
absence
3
4
of severalhundred r.p.m. may be provided to the basket
an inverted V-shaped head 52'? formed therein so as to
for elfecting centrifugal extraction of the liquid from
help spread the water out thereby to provide a larger con
densing surface to the air in the chamber formed by the
tub 9.
the clothes prior to either the heat drying operation or
removal of clothes from the container.
The operation of the variable speed drive brie?y de
The improvement of my invention lies in the particular
scribed above does not form any part of the present in
arrangement for feeding water to the opening 48 so as to
vention, and is merely set forth to provide a substantially
cause the water to emerge therefrom rapidly at a high
complete description of an operative machine.
rate of how but intermittently so that the total amount of
Water used may be kept down to previous levels even
though the rate at which water emerges onto wall portion
A com
plete detailed description of such a drive is provided, for
instance, in Patent 2,950,613, issued on August 30, 1960
to John Bochan and assigned to the General Electric Com
pany, assignee of the present invention.
To heat the clothes during the heat drying portion of
the cycle, there is provided within the machine a suitable
heater assembly including two heaters which may, for in
stance, include two heaters 27 and 28. When the heaters
are energized during the drying cycle, they operate to
heat the basket 9 which, through its rotation, then con
49 is substantially higher. The admission of condensing
water is controlled by a third solenoid actuated valve con
trolled by a solenoid 51 which is energized during the dry
ing operation so that the valve passes water at a slow rate
which may, for instance, be on the order of 1/2 gallon per
minute in actual practice. The water passes from the valve
controlled by solenoid 51 out through a conduit 52 which,
as shown in FIGURE 2, leads to an outlet 53 discharging
tacts the clothes to transfer its heat to the clothes. In
through an air gap into a receptacle 54. The receptacle
addition, since the outer cylindrical wall of the basket is 20 54 may be made accessible from the front of the machine
provided with perforations 11, the heating elements also
by means of a member 55 so that the receptacle may be
heat the clothes through radiation. The heat thus trans
ferred to the clothes causes evaporation of moisture from
used for the introduction of a suitable rinse agent during
the rinse portion of washing operations. The structure
the clothes so as to effect drying thereof.
for effecting this is fully described and claimed in Patent
Means whereby water is admitted to and discharged 25 2,887,862, issued on May 26, 1959, to Gresham N. Jen
from tub 9 during washing operations of the machine
nings and assigned to the General Electric Company,
include connections 29 and 30 through which hot and
assignee of the present invention.
cold water is supplied from a suitable source to the ma
The receptacle 54 is fully shown in FIGURE 3. As
chine for the washing operation. A valve controlled by
can be seen in that ?gure, the receptacle has positioned
a solenoid 31 admits hot water to the machine and a valve
therein a siphon 55 which has a short leg 56, positioned
controlled by an opposed solenoid 32 admits cold water
so that the opening 57 thereof is adjacent the bottom of
to the machine. The hot and cold water valves under
the receptacle, and a longer leg 58 with its opening 59
the control of the solenoids 31 and 32 discharge through
positioned to discharge into a receptacle-like vertical por
a common conduit 33 and a suitable air gap into a funnel
35 tion 60 of a conduit 61. The receptacle portion 60 in
34 positioned beneath the outlet of conduit 33. As can
turn is connected at its bottom to a portion 63 of conduit
best be seen in FIGURE 2, funnel 34 leads into a down
61 formed as a siphon with a short leg 64 and a longer
wardly extending conduit 35 and, as shown in FIGURE
leg 65 leading down to opening 48 so that water dis
1, conduit 35 is joined at its lower end to a sump 36
charged from conduit 61 ?ows down along wall section
formed at the bottom of tub 9 so that the wash water
40 49 of tub 9.
enters the tub from the sump beneath it. A pressure
When the water entering receptacle 54 from outlet 53
‘actuated sensing device or water level control 37 controls
rises to the level of the top of siphon 55, the siphon 55
both solenoids 31 and 32 to provide the proper water level
becomes primed and starts to pass the water in the re
in the machine during the operation. Sensing device 37
is connected to the interior of tub 9 by a suitable line 38
which connects with the tub almost at the bottom thereof
at 39 as shown. In addition to the water level control
device shown, the machine may be provided with other
safety devices for preventing overflow conditions from
occurring. However, such mechanisms do not form any
part of the present invention and are not shown or further
discussed herein.
Vitiated water from washing operations is discharged
ceptacle 54 up through leg 56 and down through leg 58
into receptacle 60. The level in receptacle portion 64}
rises until it reaches the top of siphon 63, at which time
siphon 63 passes the Water down to opening 48 until the
level in receptacle 60 fails to cover the inlet of short leg
64, at which time the siphon 63 ceases to be primed and
the flow of water therethrough stops.
As the essential feature of my invention, I cause the
inside diameter of the siphon 63 to be large enough so
that the rate of flow through the siphon and into the tub
is substantially larger than the rate at which Water is
from the machine through the sump 36 formed at the
bottom of tub 9. A suitable discharge hose 40 leads from
entering the receptacle portion 60 from container 54
the sump to the inlet of a pump 41 (FIGURE 2) which
through siphon 55 (and, possibly, excess flow over wall 66
may, as shown, be driven directly from motor 18. Pump
of container 54). By use of this feature, it can be seen
41 discharges through a conduit 42 to a valve 43 having
that when the water rises to the level of the top of siphon
a closure member 44 controlled by a solenoid 45. The
63, the siphon will rapidly discharge all the water in the
valve is of a conventional type and is normally open when 60 receptacle 60 even though water is continuing to enter
the solenoid is deenergized; when the solenoid is ener
from siphon 55. Thus, there will be alternate periods
gized, it holds down member 44 which pivots about pivot
during which water is being discharged at a relatively
46, and acts to close the valve 43. Thus, pump 41 oper
high rate through the siphon 63 and during which the
ates all the time during motor operation, but only when
receptacle portion 60 is being ?lled up to a level at which
valve 43 is open may it discharge through the valve to a 65 siphon 63 is primed; during the latter periods there is no
conduit 47 leading to drain. When the valve is closed
how through the siphon 63.
i
the operation of the pump is without e?ect.
As a typical example, assume an inlet ?ow rate of 1/5
As stated, the illustrated machine is of the type which,
gallon per minute from outlet “53, a siphon 63 having
during the drying cycle, uses cold water for condensing
an inner diameter of 0.5 inch, having a short leg 64 two
from the air the moisture which has been extracted by heat 70 inches in height and a longer leg 65 four and one half
from the clothes. The condenser water is admitted to tub 9
inches in height, discharging to opening 48. If the re
through an opening 48 formed in wall 13 of tub 9 sub
ceptacle portion 6% contains 1 cubic inch when siphon
stantially above the bottom of the tub, so that the water
63 becomes primed, then in 0.5 second it is emptied, with
the receptacle 60 then taking 0.5 second to be re?lled to
?ows down the lower left Wall 49 (FIGURE 1) of the
the priming level (1/2 gallon/minute being approximately
tub. As shown in FIGURE 2, wall section 49 may have
8,075,296
5
6
posed within said chamber; means for heating clothes be
equal to 2 cubic inches per second). As stated, this
causes a high rate of ?ow of liquid down wall 49, and this
ing tumbled within said chamber to provide a drying
operation by extracting moisture therefrom by evapora
tion; means for ?owing cooling liquid down a portion of
the interior of said walls in rhythmic separated pulses
during at least part of a drying operation at a frequency
suf?cient to provide a substantial number of such pulses
high rate of ?ow has been found to cause the liquid to be
spread substantially more ef?ciently over the wall section
49. This in turn has been found to cause a substantially
better heat exchange between the warm moisture-laden
air and the condensing water.
vIt will be understood that during the drying operation
the valve 43 is maintained open continuously so that, by
each minute to condense moisture out of the air con
tacting the cooling liquid; and means for conducting cool
the same arrangement which discharges wash water dur 10 ing liquid and condensed moisture from said chamber to
drain.
ing the washing operation, the condensing water and the
2. In a clothes dryer: an imperforate tub having walls
de?ning a drying chamber; clothes tumbling means dis
posed within said chamber; means for heating clothes be
in the usual way be preset so as to cause a complete se 15 ing tumbled within said chamber to provide a drying
condensed moisture may be passed ‘out to drain.
It will further be understood that the machine illus
trated is of the type which, by means of control 6, may
operation by extracting moisture therefrom by evapora
quence of washing, rinsing, centrifuging, and drying
operations to take place, my invention being particularly
tion; means for ?owing cooling liquid down a portion of
the interior of said walls to condense moisture out of the
limited to the condensation of moisture during the drying
air contacting the cooling liquid, said ?owing means com
operation and thus being useful both in combination
washer-dryers of the type illustrated and in machines 20 prising a container, means for introducing cooling liquid
into said container at a relatively low rate, and a siphon
which are provided only to effect a drying operation.
having a short leg communicating with said container
It will also be clear that my invention may be used in
adjacent the bottom thereof and having its long leg com
a machine which does not utilize a rinse dispenser of the
municating with the wall of said chamber substantially
type described in the Jennings patent simply by having
outlet 53 feed directly into receptacle 60 rather than into 25 above the bottom of said chamber, said siphon having a
substantially higher ?ow capacity than the rate of flow
receptacle 54.
of said introducing means whereby said siphon introduces
It will be seen from the foregoing that my invention
liquid into said chamber in rhythmic separated pulses
provides a pulsed-?ow feed for a condensing system in a
during at least a part of a drying operation; and means
clothes dryer whereby the high ?ow rate suitable for
effecting better condensing from the air is achieved with 30 for conducting cooling liquid and condensed moisture
from said chamber to drain.
3. The apparatus de?ned inv claim 2 wherein said
clothes tumbling means includes a perforated cylindrical
basket and said tub includes a cylindrical wall extending
out an undesirable increase in the quantity of water con
sumed for the purpose; the pulse rate may, of course, be
different from the precise example given, different rates
being readily provided by varying rate of ?ow into the
system, or the diameter or lengths of the siphon parts. 35 around said basket, said siphon having its long leg com
municating with said cylindrical tub Wall.
While in accordance with the patent statutes I have de
scribed what at present are considered to be the pre
References Cited in the ?le of this patent
ferred embodiments of my invention, it will be obvious
UNITED STATES PATENTS
to those skilled in the art that various changes and modi
?cations may be made therein without departing from 40
the invention, and I therefore aim in the appended claims
to cover all such changes and modi?cations as fall within
the true spirit and scope of my invention.
What I claim as new and desire to secure by Letters
Patent of the United States is:
1. In a clothes dryer: an imperforate tub having walls
de?ning a drying chamber; clothes tumbling means dis
45
2,695,460
2,717,456
2,824,385
2,843,943
2,843,944
2,892,335
2,899,816
Clark _______________ __ Nov.
Smith ______________ __ Sept.
Toma _______________ __ Feb.
Geldhof _____________ __ July
Toma _______________ __ July
Gray _______________ __ June
Jacobsen ____________ __ Aug.
30,
15,
25,
22,
22,
30,
18,
1954
1955
1958
1958
1958
1959
1959
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