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Патент USA US2079574

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May 4, 1.937.
`
E. s. LEA
2,079,574
_AIR CONDITIONING APPARATUS
Filed Dec. 4, 1934
' 3 Sheets-Sheet 1
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ATTORNEYS
May 4, 1937.
E. s. LEAv
'
2,079,574
AIR CONDITIONING APPARATUS
Filed Dec. 4, 1934
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BY
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ATTORNEYS
- lMay 4, 1937.
E. S. LEA
2,079,574 -
AIRCONDITIONING APPARATUS
Filed Dec. 4, 1934
3 Sheets-Sheet 3
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lNvENToR
_Edww/'w'äßea
ATTORNEYS
Patented May 4,- 1937
- 2,979,574
UNITED STATES
>PA'rsrrr lcrinale:
2,07- 9,574
AIR CONDITIONING APPARATUSEdward S. Lea, Morrisville, Pa., assigner, by mesnje"
assignments, to George Von Seebeck, New York,
N. Y., trustee
Application December 4, 1934, serial No. 755,916
I1 Claims’. (C1. zel-_91)
just as effectively as the zig-zag “scrubbers” now'
My present invention while capable of embodi
commonly employed, yet opposes far less resist
ì - ment in large size installations is more ‘particu
i larly concerned with the provision of a relatively
„ small compact unit for conditioning air in homes,
’o stores, omces and other relatively restricted en
closures.
`
'
An object of the invention is to provide a unit
of this character which is a real air conditioner
operable in all seasons of the year to filter, wash,
deodorize and regulate the temperature and hu
>midity of the air which passes through it while
removing all smoke, dust or other foreign parti
cles.
ance to the flow of air.
A feature ofthe invention is the entrapping of
some of the water removerl in the convolute exit
passageway so that the air in traveling the length
of this passageway always has evaporative cool
Aing contact with a sheet of Water in the böttom
of the passageway. In fact all surfaces contacted
by the air from the time it enters the unit until 10
it has reached a point close to the outlet of the
convolute passageways, are kept constantly wet
by sprays or mist.
f
A compact construction is aiïorded by the pro
vision of an open bottom casing, the top of which
1_ Another object is to -provide a compact air con
” ditioning unit of simple, practical, rugged, dur
able construction consisting of but few parts, `forms part of the convolute outlet passageway._
silent in operation and convenient to install, easy A motor resting on the top of this casing has a
of access for purposes of cleaning, inspection or pendant shaft driving a fan arranged at the inlet
repair,A requiring but a slight amount of power or center of the convolute passageway and below
'sa' to operate it and for the most part recirculating
this fan the shaft carries the slingers which lift
the water used to effect thorough washing and Water from a tank, the latter preferably being
proper humidiflcation of` the air which passes` removably suspended from the upper casing. A
through it so, that the total amount of water screen encircling the slingers and suspended from
5.) used over a long period of time is a- negligible the open-bottomed upper casing breaks up the N)l Gl
heavy forceful spray from the slingers and the
"’ factor in the cost of operation. f
l
Another object is to provide a unit in- which spray substantially‘fìlls the -space between the
during summer operation the cooling water is bottom of the volute outlet and the surface of the
substantially continuously recirculated and in Water in the tank, air being drawn in through
which the water returning from the sprays to the an inlet opening in the lower portion of the upper 30
casing and all of it being caused to ñow counter
cooling tank automatically establishes a circula
tion of water in the tank and over the cooling currently through the spray thrown outwardly by
coils which promotes maximum effectiveness of the slingers and thence through the fan.
Preferably a secondary slinger delivers but a
water cooling and the continuous delivery of the ’
Y minute quantity of water ‘within the fan and the
35 coldest water in the tank tothe sprays.
Another object of the invention is to ,provide - water> from this slinger is drawn into the fan
an apparatus for air washing and humidification, blades and atomized by its impact with them so
in which the air is iirst subjected to an extremely that an extremely effective‘humidifying mist zone
heavy forceful spray and subsequently subjected is created in the region of the fan.
Where cooling coils are used, they are prefer 40
v40 to an extremely fine mist, thorough washing and
temperature regulation being ’effected by the ably suspended in the tank from the open-bot
»heavy spray, and thorough humidiñcation by the tomed casing and are accessible for ready in
spection or cleansing by simply lowering the tank
and exposing the coils.
_
Another object is to provide an extremely sim
Preferably also the tank has a central well from
ì ple apparatus for carrying out the method in
whicha single motor directly drives one or more which water is centrifugally lifted by the slingers,
rotary water distributors or slingers for creating means being provided for _maintaining the water
\ the heavy washing spray and at the lsame time in this well> substantially quiescent and avoiding
drives a fan which serves the four-fold purpose a whirl-pool effect. The whirling spray delivered
of drawing the air through the heavy sprays, by the slingers further serves to set the body of
mist.
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.
water encircling this well in motion and by ar
creating the mist, breaking up relatively large
ranging the cooling coils so that they completely
encircle the well, the water in the tank working
downwardly to the`~ lower inlet in the well, will
drops of 'water which may enter tl'îe mist zone
with the previously washed air stream, and sup
plying the force necessary to expel the air stream
through a convqlute outlet passage of ‘substan
tial length but` from which the airl emerges at
have a continuous rotary motion imparted there- „-i Gl
to, whereby itmoves _substantially in a spiral
descending path and is most effectively cooled by--
100% humidity and at a temperature predeter
mined primarily by the temperature ofthe spray
water. The convolute outlet passageway removes
60 excess moisture and eliminates remaining solids
.
the coils.
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_
Another object is 'to provide an‘air condition
ing unit -devoid of spray nozzles, pump valves or
60
2
2,079,574
other minute openings capable of being clogged by
sediment in the water, and so to mount the motor
that it cannot be wetted and short circulted.
With the above noted and other objects in view,
Si the invention consists of certain novel features of
the construction and combinations and arrange
ment of 'parts which will be more fully understood
from the following description in connection with
the accompanying drawings wherein:
Fig. 1 is a vertical sectional view through an
air conditioning unit embodying the invention,
Fig. 2 is a sectional plan view therethrough on
the line 2-2 of Fig. 1,
’
Fig. 3 is an enlarged vertical sectional detail
showing the manner in which the slingers are’
mounted on the motor shaft and connected to
each other,
,
'
*
heavy sprays, into the open-bottomed, closed
topped fan J, the latter .being preferably of thev
sirocco type. The screen L which breaks up the
heavy spray from >the lower slingers K is pref
erably supported from the casing A as by sup- `
porting arms or brackets I I secured to the bottom
forming plate of the spiral passageway F.
For reasons to be more fully hereinafter de
scribed it is desirable to maintain the bottom of
the passageway F covered with water to a level
predetermined by an overflow pipe I2 the lower
end’of which terminates below the water level in
the tank B.
'
~
The inlet conduit C preferably extends the full
width of one side of the casing, the latter being4
herein illustrated as rectangular and the _inlet end
of the conduit C extends upwardly above the cas
ing top and is rectangular in cross section as indi
Fig. 4 is a further enlarged fragmentary trans
verse sectional detail on the line 4_4 of Fig. 3, cated -at I3 providing means for removably
Fig. 5 is an enlarged transverse sectional view f mounting a filter unit such as D. 'I'his unit may 20
be slid through an opening (not shown) in one
through the well, on the line 5-5 of Fig. l,
Fig. 6 is a sectional detail of the motor mount,v side of the duct portion I3 and slid into place
Fig. 7 is a sectional detail showing the manner between guide rails I4, to the end that the filter
units may be readily withdrawn and renewed.
in which the casing is supported and cushioned,
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‘
Fig. 8 is aperspective view of the apparatus as desired.
with part of the tank broken away to expose the
The ltaule
~ cooling coil, and
Fig. 9 is a view corresponding to Fig. 1 but illus
trating a modification.
30
'
General construction
Fig. 1 shows the general assemblage >consisting
of an inverted open-bottomed box-like casing
member A, the lower end of which is closed by a
water tank B, An air inletconduit C enters one
side of the casing A, a suitable filter D being pro
vided at the mouth of the air inlet. 'I‘he air outlet
E is at the terminal end of a horizontal spiral
conduit F disposed in the upper end of the casing
40
A.
,
An electric motor G resting on the top of the
casing’A includes a pendant drive shaft H, this
shaft mounting a fan J which -is disposed at the
center of the volute air outlet passageway F.l
Preferably the tank B is of the same cross sec
tional shape «as the casing A but of slightly greater
cross sectional area, whereby the lower end of the 30
box-like casing A may be immersed in the water
in the tank. . The inlet »pipe I5 through which
water is delivered to the tank is. preferably mount
ed in the casing A.
'
If itis desired to cool the water in the tank
B, cooling coils I6 are preferably suspendedv di
rectly from the casing A as by suspension rods
I'I and the inlet and-outlet headers I8 and I9- for
the refrigerant coils I6 communicate with inlet
and outlet pipes I9’ and 20’ which also extend up 40
wardly through the top of the casing A and ter
minate above it.
'
A
The casing and tank are so assembled that
the tank may be lowered to expose the cooling
The shaft also carries one or more -water dis
coils âIIS and‘render them readily accessible for
tributors K at its lower end, these distributors or
purposes of cleaning. Such ready removal of the
tank will also permit convenient removal from the
tank of sediment which may have settled therein.
As suggested in my Reissue Patent No. 20,341 the
casing A may be suspended from the ceiling, typ
_slingers being operable to raise water from the
. tank and sling it radially outwardly through a
screen L which enclrcles the slingers.
Another `slinger M carried by the shaft H has
its outlet end» terminating within the open-,bot
tomed fan J, this slinger having a lesser peripher
al speed than the slinger or slingers below it and
the water which ñows from the slinger M is drawn
outwardly and into the blades of, the fan where
ically‘a basement ceiling and the tank removably
supported by the casing itself.
Fig. 8 shows another convenient method of re
movably supporting the casing and the tank in
cooperative relationship so that the tank may be
lowered when required. 'I'his includes a housing
it is- broken up into aline mist.` Thus the ñl
tered air entering through the inlet du'ct C is ' and support unit for the tankA and casing, the
subjected first to the heavy spray which 'passes'V unit being of square horizontal cross section, open
-at its top and >at its front.> The side walls 22
through the screen L and then as it is drawn up
wardly into the fan, is subjected to the fine >mist of this unit, as well as the rear wall thereof, (not 60
in the region of the fan and then forced by the shown) are securedat their edges to rectangular
fan through the volute outlet passageway F in 1 frame structures l23, these frame structures in
cluding angle irons or other suitable _ledge form
which- the direction of ñow of the air is contin
uously changed and all of the excess moisture is ing means 24 at their‘tops, adapted to support
the casing. ,The casing for this purpose is pro
centrifugally eliminated.
'
The 'casing
vided with laterally extending brackets 25 (Fig.
7) having sockets 26 fn their under faces receiving
Referring now with more particularity to the rubber feet or blocks 21 which rest upon the ledge
casing A, the top of this casing l,constitutes the l forming members 24. Pendant latch members 28
top wall of the horizontally disposed volute pas
carried by the outer wall of the casing engage 70
sageway through which the air is blown by the hooks 29 on the outer walls of the tank so that
fan J to the outlet E. The bottom wall of the the tank is suspended from the casing.
volute passageway F provides a downwardly fac-` ‘ Rising from the bottom of the tank B is a
ing frustoeconical mouth portion III for directing
the up-flowing air which is passed through the
.well-forming member 30 of suiñcient height to
extendl above the water level in the tank.` Water 75
2,079,574
fiows into the b'òttom of this well, through a piv
v'
3
the slingers above them serve effectively as baf- »
oted valve plate 3|, the valve being opened by a' iles.
push rod 32 extending through the casing A. A
The innermost slinger M is of generally tubular
spring 33 normally tends to elevate this rod and formation throughout the greater portion of its
the rod is depressed to open the pivoted valve by " length, tapering inwardly near its bottom and ta
a control lever 34 actuated from any suitable pering only slightly outwardly at its top-as indi
means as for instance a thermostatic bellows (not cated at 5I. The baille 50 may be provided with
shown). ' The lower ezids of the nested slingers K - a collar 52 welded to the tubular slinger M; Pref
are immersed in the water of the well 30 and to
10 prevent a whirlpool effect, baflies 35 may extend
inwardly from the ‘walls of the well.
'
Motor, fan and slingers
erably the conical shell of each of the slingers K
includes a generally horizontally disposed offset
portion 53, these offsets having apertures therein
through- which tie rods 54 may pass; These rods
likewise extend through the baille 50 and nuts 55
The casing of the motor G is provided with a
screwed onto the-lower ends of the rods tend to
relatively wide annular flange 36 and the motor
rests by gravity upon the casing A, being suitably
cushioned to prevent vibration or slippage of the
ment the screws 86 and draw the slingers into
motor.- For this purpose an annular rubber gas
ket 31 (Fig. 6) ñts within a circular collar 38 ris
ing from the top of the casing. The gasket in
cludes an inwardly extending flange portion 31a
having a sharply corrugated uppersurface indicated at 31h and the flange 36 ofj the motor cas-J
ing G rests upon the corrugated gasket surface
[O Si compressing the corrugations to the desired ex
tie all of the slinger members together to supple
compactly nested relationship.
.
Extremely accurate machining of the hubs or
extremely accurate spinning of the conical shells y
K are not necessary1 since the openings 81 com
pensate for slight machining or spinning inac
curacies and tightening of the tie rods 54 pulls
the shells into snugly nested relationship regard->> '
less of whether the openings 81 a-re in directalignment or not.
_
,
-
_
-
tent -so that snug seating occurs, this annular
As the nested-hubs of the conical shells, slingers
flange 36 fitting snugly within the thicker outer or distributors K rotate in the water in the well
portion 31 of the gasket.
30, the water is drawn upwardly along the inner
The purpose of corrugations is merely to ren
wall of each slinger and is flung centrifugally
30 der that portion of the rubber gasket upon which
from -the mouths of these slingers with consider- ‘
the motor seats more 'readily compressible and able violence, driving through the screen L which
distortable to insure tight seating of the flange breaks up this heavy forceful spray to some ex
36 thereon. The' fan H is securedupon a hub 48, tent and causes the spray to be >projected fanwise
the hub in turn being affixed to the pendant mo
into> the space between the screen and the side
tor shaft H. An opening 4I in the top of the walls of the casing.' The space between the wa
casing A of slightly greater internal diameter ter level and the' bottom of the spiral chamber is
than the maximum external diameter ofthe fan substantially ñlled with the heavy spray which
permits the fan to be attached to the motor sha’ft has passed through the screen, it being borne in
and then to be lowered in place through the cas-` mind that the water which passes through this
40 ing top as thevmotor G is lowered o'nto its seat.
, screen is simultaneously acted upon' by’three dif 40
Various expedients may be resorted to for se
ferent forces. -First the centrifugal force which
curing the distributors or slingers to Vthe motor has projected it through the screen; secondly, the
shaft and in Figs. 3 and 4 I have illustrated one force of gravity; and thirdly, by the -up-draft _of
satisfactory method of mounting a plurality of the fan. The result of these forces is to substan
- ‘nested slingers concentrically with respect to the _ tially fill the entirespace- between the bottom of
shaft. Each of the lower slingers K include_s‘a spiral chamber F and the water level and out
generally conical shell 45, the- 'mouth -of which wardly beyond the fan with a very heavy spray
flares outwardly in a substantially horizontal Vwhich washes and‘rcools the air entering the ap- . v
' plane as indicated at 46.. Radially disposed ribs paratus through the duct C.
«
41 mounted on the edges of the horizontal por- `
The water travels rather slowly up the dis- r
tions of the shells serve to add impetus to the tributor M however, and since this distributor is
water which is flung> circumferentially by the traveling at much lower peripheral speed than
' slingers when the latter are rotated; The lower I the slingers K, a relatively thin sheet of water
reduced end of each shell 45 carries an internal is projected radially from ‘the rnouth of the
hub 45a in the nature of a spider, the hub of each - slinger. This less forceful spray is drawn practi
slinger fitting over the shellfportion of the next cally in a horizontal direction by the -fan suc
_ adjacent slinger and all of ‘the hubs’being con
tion into contact with the fan blades and since
nected together and secured to the shaft H by the fan is -travelin'g ata substantial peripheral
G0
elongated set screws 86 passed through register- -
speed, the radial spray from the mouth of the '
ing openings in the solid portions of the spider
like hubs and into engagement with the shaft.
slinger M is broken up into a ñne mist by impact 60
Only the innermost hub is threaded for recep
tion of these screws, the outer hubs being provid
ed with elongated openings 81 through which the
7 screws freely pass.
I_n Fig. 3 I have illustrated three of the gen
erally conical slingers K nested one with the
other, with the edges of all of the slingers termi
nating in the same vertical plane and ‘with the
with the fan blades. Part of this mist is driven
back into the fan and part of it is blown beyond
Athe fan into the spiral passageway and part of it
tends to settle downwardly and commingle with
the thoroughly washed air stream which has'
passed through the heavy spray and is moving
upwardly into the fan, carrying with it some
drops of `Water of relatively large size. 'I'hese
drops upon striking the fan are ñnely sub
~
horizontal portions of the -slingers closely over- e divided and converted into mist.
‘
The whirling spray afforded by the lower -
lying each other. Preferably a. baille plate 50 is
arranged immediately- above the innermost and
uppermost of these slingers K to prevent the wa
ter from being ‘thrown in an upward direction’.
No bañies are required for the lower slingers since ,
slingers K tends to impart awh'irling or rotary
motion- to the body of Water in the'tank B. This
is particularly advantageous for purposes of cool
ing water, especially in conjunction with the ar -I Si
I
4
'2,079,574
rangement of a water entrance at the lower end
cal ¿space and the height of the entire unit need
only of thewell. Ordinarily the Water in the well
will be at such a temperature that convection
not be more than a couple of feet. 'A great
economy of materials as well as space is thus
circulation thereof over the cooling coils will benegligible but by drawing water always from the
recirculated over and over again, this being par
afforded. 'I'he water in the tank is preferably
ticularly advantageous in the Winter time when
` bottom of the tank intothe Well and by rotating
the body of Water in the tank, the water at the _ -no cooling is vdesired since the water will quickly
top of the tank will move gradually toward the assume the temperature of the air and the device
bottom of the tank and during this movement will simply act as a humidiñer and not as a
will be progressively swirling over the series of cooler. No special‘control for maintaining a con
cooling coils so that heat interchange between the -stant water level or a slow inflow and outñow
Water and the coils is promoted. This swirling from the tank has been .shown but means may be
obviously utilized if desired'.
motion of the water also aids in keeping the coils
I have not shown any ducts connected either
Windows 60 arranged in the casing A and to the inlet or outlet of the machine but for the ‘
registering with openings in the outer shell 22 purpose of Ventilating a private home or other
clean.
.
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permit the operation of the device to be con
tinuously inspected at all times and the speed of
the motor for instance accordingly adjusted.
Preferably the pivoted valve 3| is merely a rough
relatively small enclosure the arrangement of
ducts may beV extremely simple, consisting merely
casting which does not seat snugly so that a cer
upper floor of the house, the ducts being reversible
for the delivery of cold -air at the top of the
of one outlet duct and one inlet duct arranged
respectively in the lower floor and one in the
n1)
tain amount of water is always leaking into the
well 30 and some slight amount of water is being house in summer or warm moist air in the lower
distributed by the slingers even when the valve is ' part of the house in winter, it merely being neces
sary to change the duct connections from the
in its closed position.It will be observed by reference to Fig. 2 that inlet to the outlet connections of the machine to
the convolute chamber through which airis ad- - reverse them for winter and summer use.
_ Obviously the cooling coil may be supplied
vanced` by the fan toward the outlet is of pro
gressively increasing cross sectional shape. In -from any source of refrigerant but an ordinaryv
other words it is a true spiral so thatthe air household ice box unit is adequate for effecting I'.
traveling through it is subjected to a continuous the refrigeration desired. In localities where
change of direction to expedite the removal relatively cool reservoir water is available and
where water is cheap, the refrigerating unit may
therefrom of all excess moisture and insure >de
be dispensed with even in the summertime.
livery at _the outlet `of the machine ,of 100%
’ humidifled air carrying no
excess
entraincd
moisture.
By using an overflow inlet such as I2, the bot
tom of the spiral or convolute outlet passageway
is always covered with water andv additional
40
A Cl
Insofar as the control ofthe mechanism is con
cerned, any of various standard controls may be
used. For the simplest form of operation I
simply use a humidistat or’thermostat to cut
evaporative cooling is obtained.- In fact‘from the
the motor in and out. With the type of installa
tion shown, thermostatically or humidistati'cally
time the air approaches the lower end of the con
duit C‘until the time it ls half way through the>
the valve which admits water to the well and the
convolute outlet passageway, everyssurface which
motor runs continuously so that circulation of
it contacts is a wet surface so that the maximum
air is always maintained. In this connection it is
Worthy of note that the inlet end of slinger M
terminates below the lower ends of slingers K.
evaporative cooling in addition to direct cooling
by the sprays is obtained.
The air drawn into
the duct C tends to advance around all sides of
the screen K and to be drawn in a -vortex into
the fan after having countercurrent through the
spray thrown‘outwardly by thev lower slingers K.
No airis permitted to by-pass these sprays and
since the _entire _region of the fan is practically
controlled means are operative to close or open
By allowing a slow leak through valve a certain
amount of water will always flow from slinger
M to effect creation of a mist in the region of
the fan and to humldify all air passing through
the spray even when there is no water available
for the spray creating slingers K. Where it is
ñlled with a fine mist, thorough humidlflcation of
desirable to maintain a continuous washing
the air' ls assured. The excess moisture removed
by centrifugal force from the air` which has ad
down the'walls of this chamber and the excess
flows through the pipe I2, 'the overflow being
silent due to the- immersion of the lower end of
the pipe in the .‘Water'tank¿.
action of the air Without substantial humidifìca
tion thereof, it .will of course be apparent that
the inletv end of the- slinger M may terminate
above the lower ends of the `slingers K. The
principlev involved is permitting one slinger to
rob the other of water when the valve is closed.
More complex controls might of course be uti
' The compactness of the unit- will be apparent
lized .if desired, it being perfectly apparent that
Iva'nced through theÍ convolute passageway, drains
from
the 'foregoing
description. Practically
every available cubic foot of space is utilized.
>The convolute passageway while ofV substantial
. _length is conñned within a relatively small volu
metric space. _The space between the bottom of
this convolute >discharge passageway. and the wa
`ter level in the tank is but slight arid it is entirely
>filled with heavy spray.~ The center of the pas
70 sageway F is occupied by the fan. The slingers
K are disposed at but a slight distance below‘ the
by the simple procedure of regulating the
temperature of the refrlgerantor other tempera
ture changing medium utilized, both the
temperature and humidity of the air within an
enclosure could be accurately controlled within
narrow limitations.
Heaters at the inlet or
outlet lof the machine might be employed, if
desired', in the winter time but their use is con
ventional and they have not been illustrated.
The present machine'is primarily designed to
fan and the vertical space occupied by the entire _ insure a uniform humidity for any givenair
temperature, maintaining the humidity com
unit is-reduced to a minimum. When no re
’ frigerant coils are in use, the tank may of course
fortably high in the winter time and comfortably
be very much shallower to further conserve verti
low in the summer time. VIn fact where a rela~
(iii
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_ 2,079,574
tively small capacity refrigeratlng machine is
5
proximating that of the air passing through the
utilized, most of the energy developed in the
refrigerating machine will be used in extremely ' It.will thus be seen that there -is herein d_e
hot weather for absorbing latent heat from the scribed a method- and apparatus' in which the
hot air which enters the machine and even though several features of this invention are embodied,
the unit exerts no >appreciable cooling effect on v_and which method and apparatus in their action
machine.
e
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extremely hot days, it will have a very marked ` attain the various objects of the invention and
effect on humidity. In other words, the unit is are well suited to meet `the requirements of
practical use.
ì
primarily designed to 'provide a compact, inex
As many changes could be made in the above 10
pensive apparatus requiring but slight power to
operate and serving the very practical purpose construction, and many apparently widely dif
ferent -embodiments of this invention could be
of keeping the air -within a house or other en
closure comfortable and clean and-in motion. made without departing from the scope thereof,
The maintenance of a sufficiently high hu'
15 midity in winter and of suñìciently low humidity
in summer are factors being of considerably
zo
it is intended that all matter contained in the
above description or shownl in the accompany 15
ing drawings shall be interpreted» as illustrative
more importance than variation lof temperature
and not in a limiting sense. >
within a few degreesone way or the other.A
The use of a plurality of nested slingers for~
claim as new and desire to secure byV Letters Pat
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Having thu's described my invention, what I
n
the production of- the heavy spray is entirely ent is:---1. An air conditioning apparatus including an
optional, depending upon the volume of air to be
handled and the particular screen arrangement. open-bottomed casing, a water receiving tank
constituting a displaceable bottom for said cas
I herein utilized is also subject to many changes
ing, said casing having an air inlet and an air
within theA scope of the invention.
outlet therein, fan means within the casing for
-25
In Fig. 9 I have illustrated a slight 'modifica
tion in which the tank B has been replaced by _inducing `flow of air from the inlet to the outlet,
a much shallower .tank B’.
This type of tank l
may be 'used in the winter time or wherever no
refrigeration of the water is required. The well
and its inlet valve are omittedl and a pair of
L-'shaped brackets 90 are secured to the tank
bottom, the upstanding legs of these brackets
air spraying means in .the casing drawing water
from the tank, coils in the tank for regulating
the temperature of the water, means suspending
said- coils from the casing and means permitting 30
lowering said tank with respect to the casing to
thereby expose the coils.
.
2. An air conditioning apparatus including an
being arranged close to the slingers and vserving
casing, a water receiving tank
to- suñiciently 4baille the iiow of water in the ppenv-bottomed
35
region of the slingers to prevent a Vwhirlpool constituting a displaceable bottom for said cas
ing,
said
casing
having
an
air
inlet
and
an
air`
or cavitation eiïect. I have likewise shown the
screen L as supplemented _by a second screen L', outlet therein, fan means'within the casing for
the latter screen being pendant from the bottom
plate of the convolute casing F and being dis
40 posed concentrically with but at a substantial
radial distance from the screen L.
The screen
L' preferably has its lower end immersed in the
water in the tank so that the waterîwhich drains
down it will flow silently into the tank. By
,5,0
inducing ñow of air from the inlet to the outlet,
air spraying means in the casing drawing water
from the tank, coils in the' tank for regulating the 40
temperature of the water, means suspending said
coils from the casing, means to permit downward
displacement of said tank with respect to the
casing to expose the coils, inlet and outlet con
duits for temperature changing ñuid connected
virtue of this arrangement the water, after pass
to the coils and extending through the casing.
ing through the screen L will strike the-screen A
3. An air conditioning unit of the _class de
L'; some of it will splash back toward the center scribed including a housing, the lower end of
of the tank and much of it will pass through the which constitutes a water tank, a motor disposed
screen L’ and 'be projected in va further sub
above the housing and a motor shaft extending 50
divided spray into the path of the iniiowing air. downwardly into the housing, a fan carried b'y
The particular mesh of the screens utilized and ` the motor shaft near the upper end of the housing
, their distance from the peripheral edges of the
slingers are all factors which determine the na
ture of the washing and cooling spray. I may
55 ‘omit the central screen altogether, in which case
and a volute air outlet passage encircling fan
and into which air is discharged by the fan, a cen
trifugal rotary water elevator and slinger car
ried by the lower end'of the shaft having its
much less noise is created by the water striking lower end immersed in the water of the tank and
the outer screen, the latter inthis case being of - discharging below the level of the volute, and
relatively fine mesh, particularly at the point means for directing a water spray linto the` fan
where the heaviest part' of the spray strikes it.
be broken up thereby and createa fine humidi 60
«sol InFig. 9 it will also be observed that I have to
fying mist at the inner portion of the volute, an
used a single slinger K in conjunction with the air inlet in the housing arranged so that the air
slinger M and the arrangement of tank, screens therefrom is drawn through theA spray from the
andsllngers illustrated in Fig. 9 is of course slinger by the fan.
'
,
g
considerably less expensive than that previously
4. An air conditioning unit of the class de
described. Small'units of the character shown scribed including4 a housing, the lower end of
in Fig. 9'are particularly effective _where cold which constitutes a water tank, a motor disposed
water is available in the city ìnains, or for the above the housing and a motor shaft extending
purpose of maintaining the proper humidity> of ` downwardly into the housing, a fan carried by
air in winter time. Where these units are use_d the motor shaft near the upper end of the hous
for cooling, of course a substantially continuous ing and a volute air outlet passage into which air
flow of water should be maintained in the tanks is discharged' by the fan, a centrifugal rotary
but where'they are used for merely humidifying water elevator and slinger carried by the lower
purposes, the Water is constantly rècirculated end of the shaft having its lower end immersed
in the water of the tank, an air inlet in the hous
and will ultimately reach a temperature ap
6
2,079,574
ing arranged so that the air therefrom is drawn.
through the spray» from the slinger by the fan,
I a second slinger of greater heighth and less maxi
in the top of the housing, a-motor supported
upon the top of the housing,.a motor shaft ex
` tending downwardly and inwardly intothe hous
mum Vdiameter' than the iirst slinger for deliver - ing, a fan fixed on the motor shaft at the center
ing a spray of water within the fan to be broken of the volute passageway, anair inlet at one side
up into a mist by contact with the fan blades, a ofthe housing above the water level and below
well in the tank, a valve controlling flow of water the volute passageway, a centrifugal water slinger
into the lower end of the well and adapted to per
carried by the shaft and discharging in the space
mit even in closed position a~ slight leakage of between the water level and the vbottom plate of
10 water into the well, saidslingers drawing water the volute passageway, a second slinger ñxed to 10
from the well, one slinger extending below the
other slinger whereby upon slow leakage of water
into the well substantially only said longer slinger
will draw water from the well.
15
v
5. Ina unit of the class described, a housin
a water tank constituting the bottom of the hous
ing and an open-bottomed casing constituting the
top of the housing, a horizontally disposed, doubly
convolute air outlet passageway in- the top of the
20 housing, a motor supported upon the top of the
housing, a motor shaft extending downwardly andv
inwardly intovthe housing, a fan fixed on the
motor shaft at the center of the volute passage-‘
way, an air inlet at one side of the housing above ,
25 the water level and below the volute passageway,
a centrifugal water slinger carried by the yshaft
and discharging in the space between the water
the motor shaft, traveling at less peripheral speed
than the ñrst slinger and having its discharge
` end disposed within the fan.
9. In a unit of the class'described, a housing,
a water tank constituting the bottom of the hous 15
ing and an open-bottomed casing constituting
the top of the housing, a >horizontally disposed,
doubly convolute air outlet passageway in the
top of the housing, _a motor supported upon the'
top' of- the housing, a motor shaft extending
downwardly and inwardly into the housing, a
fan ñxed on the motorl shaft at the center of the 4
volute passageway, an air inlet at one side of the
housing above the water level and below the vo
lute passageway, a centrifugal water slinger
carried by the Vshaft and discharging in the space
between the water level and the bottom plate of
25 '
level andthe _bottom plateof the volute passage- ' the volute passageway and a baille means co
way and a baffle means coacting with the upper -acting with the upper surface of said slinger to
30 surface of said slinger to direct the spray from
direct the spray from said slinger substantially 30
said slinger substantially radially outwardly and
a second slinger .also drawing water from the well
and directing it radially outwardly into the fan.
6. In a unit of the class described, a housing,
35 a water tank constituting the bottom of 'the hous
ing and an open-bottomed casing constituting the
top of the housing, a horizontally disposed, dou
bly convolute air outlet passageway in the top
of the housing, amotor supported upon the 'top
40
of the housing, a motor shaft extendingfdown
wardly and inwardly into the housing, a fan fixed
on _the motor shaft- at the center of the volute
passageway, an air inlet at one side of the hous
. ing above the-water level and below the _volute
45 passageway, a centrifugal- waterY slinger carried.
by the shaft and discharging in the space between
- the water level and the bottom plate of the volute
radiallyoutwardly, a second slinger fixed to the
motor shaft, traveling at less peripheral speed
than the ñrst slinger and having its discharge
end disposed within the fan, said bailie meansv
Vbeing carried by said second mentioned slinger. 35
1,0. Ina unit of the class described, a housing,
a water tank constituting the bottom of the hous
ing and an open-bottomed casing constituting,
the top of the housing, a_ horizontally disposed,
doubly convolute air outlet passageway in the
-top of the housing, amotor supported upon the
top of the housing,'a motor shaft extending
downwardly and inwardly into the housing, a
fan fixed on the motor s_haft- at the center of the "
volute passageway, an air inlet :at one side of the
housing/ above the water level and below the
volute passageway, a centrifugal waterA slinger
passageway and a screen encircling the periphery carried by the shaft and discharging in the space
of- the slinger for breaking up the spray.
between the water level and the bottom plate of
7. In a unit of the class described, a housing,- f the volute passageway, a second water slinger
a water tank constituting the bottom of the hous
by the shaft and discharging into the fan.
ing and an open-bottomed casing constituting carried
11. An air conditioning unit of the class de
t 4rthe top of the housing, a horizontally disposed, scribed including a casing, a tank’at the bottom
doubly convolute air outlet passageway in the
55 top of the housing, a motor supported upon the thereof, a motor disposed above the housing and
a motor' shaft extending downwardly into the
top of the housing, a motorI shaft extending
a fan carried by the motor shaft near
downwardly and inwardly into the housing, a housing,
the upper- end of the housing and a volute air
fan ñxed on the motor shaft at the `center of the outlet passage into which air is discharged by
volute passageway, an air inlet at one side of the the fan, a rotary water distributor carried by
housing above the water level and below the the lower endof- the shaft having its lower end
volute passageway, a centrifugal water slinger immersed in the water of the tank, an air vinlet
carried by the shaft and discharging in the 'space '
in the housing arranged so that thel air there- -
between the water level and the bottom plate of from is drawn through the spray from the dis
the volute passageway and a screen encircling , tributor by the fan, a second distributor carried
65 the periphery of the slinger for breaking up the
by the shaft for delivering a sprayI of water with
_ spray, means for supporting said screen from the
in the fan to be broken-up into a-mist by contact
lower wall 'of the volute passageway.
the fan blades„said second mentionedv dis
8`. In a unit of the class described, _a housing, with
tributor delivering _a relatively light low velocity
a water tank\constituting the bottom of- the
spray and said'ñrst mentioned distributor deliv-I
70 housing and an open-bottomed casing'constitut. -eringa relatively‘heavy high velocity spray. 70.
ing the top of the housing, a horizontally dis
posed, doubly convolute airioutlet passageway
EDWARD s.V LEA. l ,
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