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Патент USA US2125727

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Aug. 2, 1938.
M. KALISCHER ‘
2,125,727
AIR CONDITIONING APPARATUS
Fil’ed Dec. ‘'14, 1955
5 Sheets-Sheet 1
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INVENTOR
“ MILTON KnuscHse
429k
BY
ATTOR EY
‘ Aug- 2, 1938-
M. KALISCHER
2,125,727
AIR CONDITIONING’ APPARATUS
Filed Dec. 14, 1933
3 Sheets-Sheet 2
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RELAY
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MOTOR COMPR
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ONDENSER
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FIG. 3.
IWITNESSVES:
(5'
‘
INVENTOR
‘
.
MILTON KHLISCHER
MW
ATTO
EY
Aug. 2, 1938;
M. KALISCHER
2,125,727
“AIR CONDITIONING APPARATUS
Filed Dec. 14, 1933
3 Sheets-Sheet 5
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WITNESSES:
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INVENTOR ‘
MILTON KFILI‘SCHER
BY //v 1!?
ATTOR; Y
Patented Aug. 2, 1938
i
'
.
.
2,125,727
UNITED STATES PATENT OFFICE
2,125,727
AIR CONDITIONING APPARATUS
Milton Kalischer, Spring?eld, Mass, assignor to
Westinghouse Electric & Manufacturing Com
pany, East Pittsburgh, Pa., a corporation of
Pennsylvania
7
Application December 14, 1933, Serial No. 702,376
10 Claims. (Cl. 62—129)
My invention relates to air conditioning apparatus, more particularly to a unit air conditioner
of the self-contained type, that is, an air conclitioner including the refrigerant—liquefying means
5 as part of the unit, and it has for an object to
provide improved apparatus of the character set
forth.
'
In accordance with my invention, I provide a
‘casing or cabinet containing a refrigerating unit,
10 including a compressor, a motor for driving the
same, and a condenser, in ‘one compartment and
posed in the diagonally-opposite corner.
in Fig. 1, the coil l4 extends from a point adja
cent the upper right hand corner to the lower
vide a- water-cooled condenser, which is in the
form of a double tube coil encompassing the
motor~compressor unit and is preferably carried
thereby. I may also provide a coil for cooling
20 the motor, said coil using the cooling water discharged from the condenser. The motor-compressor unit may be mounted within the casing
on springs to absorb vibration.
Fig. 1 is a vertical longitudinal sectional view
25 of the unit air conditioner;
Figs. 2 and 3 are end views of the air conditioner, as seen from the left and the right, re-
spectively, of Fig. 1; and
Fig. 4 is a plan view of the refrigerating unit,
30 showing the motor compressor unit and the condenser.
40
45
'
The evaporator coil 14 is arranged obliquely
in the chamber l3, one end thereof being disposed
adjacent the corner of the walls containing the
inlet and the outlet, and the other end being dis- 10
an air-cooling heat exchanger in another com—
partment. Preferably, the compressor and an
electric motor driving the same are enclosed in
15 a ?uid tight or hermetically sealed casing. I pro- '
35
casing and disposed in the inlet opening it to‘
eiiect circulation of air inwardly through said
opening. A vertical plate 20', disposed between
the fan and the evaporator and in alignment with
the axis of the fan, is provided to remove the 5
rotary movement imparted to the air by the fan.
'
Referring now to the drawings more in detail,
I show, at Ill, 8, unit air conditioner of the selfcontained type.’ The conditioner l0 includes an
inner casing II, in which most'of the apparatus
is mounted, and an outer casing“. The inner
casing includes an upper chamber l3 containing
the air treating apparatus, which in this case is
an evaporator coil I4 for cooling the air, and a
lower chamber l5 containing a refrigerating unit
I6 which provides a supply of refrigerant for
the coil H. The chambers l3 and I5 are separated by a partition I], which preferably includes
a heat insulating material. Fiber board insulating material, such as “Celotex”, is well suited to
this purpose, since it is also a sound-deadening
material. Similar material may also be placed
on the side and bottom walls of the lower cham‘, ber l5 for heat and noise insulation.
.
50
The upper chamber 83 has an inlet opening l8
in one side thereof, preferably one of the narrow
sides or-ends of the chamber. The chamber I3
is further formed with an outlet opening l9, preferably, as shown, in the upper wall thereof. A
. spring mounted fan 20 is carried by the inner
As seen
left hand corner. The coil It includes tubes 2!
extending lengthwise, of the coil and heat transfer 15
?ns or plates 22 extending at right angles to the
tubes and ?xed thereon in heat-exchanging con
tact to provide extended heat-transfer surfaces.
In this position of the coil I4, the ?ns 22 extend
in a direction intermediate the horizontal direc
tion in which the air enters through the inlet and
the vertical direction in which the air leaves
through the outlet. The ?ns 22 may also be de
scribed as disposed roughly parallel to, or within
a small angle of, a line extending from the center 25
of the inlet to the center of the outlet, or as dis
posed approximately at right angles to a plane
bisecting the angle between the walls having the
inlet and outlet. It will also be noted that the
lower edges of the ?ns extend obliquely across 30
the horizontal air stream coming from the inlet,
in which position they are adapted to intercept
the air.
As seen in Fig. 1, the air is caused to flow from
the inlet l8 horizontally to the left. As the air 35
strikes the lower edges of the fins, said ?ns, be
cause of their angular position described above,
cause the air to ?ow upwardly and somewhat to
the left, thereby assisting in changing the direc
tion of air ‘?ow from horizontal movement 40
through the inlet, to vertical movement through
the outlet l9. A sheet metal member 23 attached
to the inner casing ll serves to further change
the direction of the air to vertical direction and
to guide the same to the outlet l'9. In ?owing 45
in contact with the ?ns 22 and with the tubes
2|, the air gives up some of its heat and is cooled,
and usually also dehumidi?ed.
The outer casing is provided with an inlet'
opening 23 and an outlet opening 24 arranged 50
substantially in registry with the inlet opening I8
and the outlet openirig i9 vof the inner casing,
respectively. A ?lter 25 for cleaningthe air and
a grille 26 are positioned in the outlettopening 24.
The refrigerating unit l6 includes a motor 55
2
.
2,125,727
compressonunit 21 and a water cooled condenser
23.
The motor compressor unit is preferably en- '
closed in a hermetically-sealed casing 29. In
the present case, I have shown a motor com
5 pressor unit similar to that disclosed and claimed
in the application of Wm. B. Anderson, S. N.
636,393, ?led October 5, 1932, now matured into
Upon decrease in pressure, the closing move
ment of the valve 36 is effected. The advantage
of placing the valve controlling ?ow of cooling
water at the discharge end is that the valve is
subjected to the warmer temperature of the cool- 5
ing water, and hence the objection of condensa
tion forming on the valve is avoided.
Patent No. 2,012,704, issued-Aug. 27, 1935, and
The casing of the motor compressor unit has
assigned to the assigneeof the present applica
attached thereto brackets 39 for supporting the
same.- Each bracket 39 has end portions 40 of 10
inverted cup shape, in which helical compres
sion springs 4| are mounted. These springs 4!
10 tion, which includes separate motors in the end
portions of the casing of reduced diameter and
separate compressors driven by the respective
motors and disposed in the central‘wider por
rest on cross members 42, which are attached to
Since the detail construc- , vertical angle irons 43 of the inner casing Ii.
The condenser 18 is carried by the motor com- 15
15 tion of the motor compressor unit is not involved
tion of the casing 29.
in this case further than pointed out above, it
will not be further described herein.
The va
porized refrigerant to be ‘compressed is conveyed
to the motor compressor unit through a conduit
' 20 3| and compressed refrigerant is discharged
therefrom into a conduit 32.
' '
The condenser 28 comprises a double tube coil,
as indicated on the drawings, which is helically
wound about the end .portions of reduced diam
25 eter of the motor compressor casing. A ?tting
33 is provided at one end of the condenser. The
pressor unit 21, in this case being held between
straps 44 and 45, the former being ?xed on the
end portions of the brackets 39.
The evaporator I4 is supplied with liquid from
the liquid receiver 34 through a conduit 46 and 20
expansion valve 41. Refrigerant ‘vaporized in
the evaporator is returned to the motor com
pressor unit through the conduit 3|.
From the above description, it will be seen that
I have provided a simple and compact arrange- 25
ment in which all of the apparatus for cooling
conduit 32 is connected to the ?tting 33 to ad- r air is embodied in a single unit, which may be
mit compressed-refrigerant to the condenser,
said refrigerant being admitted to the annular
. a portable unit if desired.
'
The apparatus shown in this case’ effects cir
30 space between the inner tube 30 and the outer , culation, cooling and cleaning of the air, and is 30
tube 30'. The inner tube 30 contains cooling also known as a room cooler. It will be under
water, the cooling water being discharged from stood that apparatus for effecting additional air- '
the condenser at the ?tting 33. The opposite end conditioning functions may be embodied therein
of the double tube coil forming the condenser without departing from my invention.
35 28 is connected, as shown in Figs. 1 and 3, to a
While I have shown my invention in but one 35
liquid receiver 34 carried by the inner casing form, it will be obvious to those skilled in the
, ll. As shown particularly in Fig. 3, the outer art that it is not so limited, but is susceptible of
tube 33’ is connected directly to thecasing form
various changes and modi?cations, without de
ing the liquid receiver, so that the condensed re
parting from the spirit thereof, and I desire, 4
40 frigerant is admitted directly into the liquid re
therefore, that only such limitations shall be 4!)
ceiver. The inner tube 30 containing cooling placed thereupon as are imposed by the prior art
water is extended through another opening in -or as are speci?cally set forth in the appended
the liquid receiver, this arrangement'eiiminat
claims.
‘
ing the necessity for an additional ?tting to What I claim is:
45. bring the inner tube out of the outer tube. The
1. A unit air conditioner comprising a casing 45
end of the inner tube projecting from the liquid having upper and lower compartments, an air
receiver is connected ‘to a supply of cooling wa_+ cooling evaporator in the upper compartment,
ter, this end of the coil being the inlet, end. The means for circulating air through said upper
cooling water ?ows in the direction opposite to - compartment in heat exchange relation with said
50 the direction in which the refrigerant ?ows, evaporator, av motor-compressor unit disposed in 50
thereby providing a counter?ow arrangement as the lower compartment, a cooling coil disposed
is well known in the art.
'
Returning to the ?tting 33, the cooling water
discharged from the condenser by the inner tube :
55 30 is admitted to a cooling coil 35 which iswound
around said end portions of reduced diameter of
, the motor compressor casing, being“ in direct
about the motor-compressor unit for cooling the
same, and means for conveying cooling water .
through said coil.
'
2. A self-contained unit air conditioner for an’ 55
enclosure comprising a casing having upper and
lower compartments, an evaporator in the upper
compartment, means for circulating air through
said upper compartment in heat exchange rela
00 The cooling water discharged from the condenser, ' tion with said evaporator, an enclosed motor- 60
while relatively warm, is still su?lclently cool to compressor unit in the lower compartment com
.maintain the motor of the motor-compressor_ prising a motor, a compressor driven thereby: and
unit at sufficiently low temperature. The other. a ?uid tight casing enclosing the motor and the
or discharge end of the. cooling coil 35 is con
compressor, a cooling passage extending about
65 nected'to a valve 36 which controls the flow of . said fluid tight casing for removing heat from 65
cooling water. .The valve 36 is operated by a said motor-compressor unit, and means for con
pressure responsive device 31, which is subjected veying cooling ?uid through said passage.
to the pressure in the high side, or high pressure
3. A unit air conditioner comprising a casing
portion, of the refrigerant circuit, said pressure having upper and lower compartments, an air
70 being transmitted from the liquid receiver 34 cooling heat exchanger in the upper compart- 70
through a tube 38. Upon increase in pressure in ment, means for circulating air through said
the high pressure side, indicating a greater de
upper compartment in heat-exchange relation
mand for cooling water, the pressure responsive with said heat exchanger, a motor-compressor
device 31 effects increased opening of the valve unit disposed in the lower compartment, a cool- 7
76 36 to provide the greater flow of cooling water. ing coil disposed about 1the motor in. heat?“
contact with the outer surface of the casing and
disposed interiorly of the condenser tube 38.
2,125,727
3
exchange relation therewith, a condenser in the compartment, said upper compartment having an
lower compartment, and means for conveying _ inlet at one end and an outlet at the top thereof,
cooling ?uid ?rst through said condenser and an evaporator coil disposed in said upper com
partment in a direction the major component of.
then through said cooling coil.
4. A unit air conditioner comprising a casing which is horizontal, and means for circulating air
having upper and lower compartments, an air inwardly through said inlet, over said 'coil, and
upwardly through said outlet.
cooling heat exchanger in the upper compart
8. A unit air conditioner comprising a housing ,'
ment, means for circulating air through said
upper compartment in heat-exchange relation structure of horizontally elongated form and
with said heat exchange, a motor-compressor unit comprising upper and lower horizontally elon- 10
disposed in the lower compartment, a cooling gated compartments, an elongated motor com
coil disposed about the motor in heat-exchange pressor unit disposed horizontally in said lower
compartment, said upper'compartment having an
relation therewith, a condenser comprising a
inlet at one end and 'an outlet at the topthere
double-tube coil encompassing the motor-com
cf, an evaporator coil disposed within said upper 15
pressor
unit,
and
means
for
conveying
cooling
15
?uid ?rst through said condenser and then compartment, and means for circulating airin
wardly through said inlet, in contact with said
through said cooling coil.
5. A unit air conditioner comprising a casing '
having upper and lower compartments, an air
20 cooling heat exchanger in the upper compart
ment, means for circulating air through said
upper compartment in heat-exchange relation
with said heat exchanger, a motor-compressor
unit disposed in the lower compartment, a cooling
25 coil disposed about the motor in heat-exchange
relation therewith, a condenser carried by the
motor-compressor unit, means for conveying
evaporator coil, and upwardly 'through' said out
let.
9. In a unit air conditioner, the combination 20
of a housing comprising a top wall having an out
let opening therein and a plurality of vertical
walls one of which has an inlet opening adjacent
the top wall, a cooling coil disposed beneath said
outlet and inclined downwardly in a direction 26
away from said inlet, said coil having extended
heat transfer surfacesdisposed perpendicularly
cooling fluid ?rst through said condenser and I thereof, and a propeller fan disposed on a hori- '
then through said cooling coil, and means for
30 resiliently supporting the motor-compressor unit.
6. A unit air conditioner comprising a casing
having'upper and lower compartments, an air
cooling heat exchanger in the upper compart
ment, means for circulating air through said
35 upper compartment in heat-exchange‘ relation
with said heat exchanger, a motor-compressor
unit disposed in the lower compartment, a cooling
coil disposed about the motor in‘ heat-exchange
relation therewith, a condenser comprising a
zontal axis adjacent said inlet for effecting ?ow
of air horizontally inwardly through said inlet, 30
obliquely over said extended heat transfer surf
faces and upwardly through said outlet.
10. In a unit air conditioner adapted to be
disposed within a room to be air conditioned come W
prising a chamber including a top wall having an
outlet therein and a plurality of vertical walls
one of whichhas an inlet therein, a fan mounted
on said chamber for ,eifecting circulation of air
therethrough from the inlet to the outlet, a coil
double-tube coil encompassing the motor-com
disposed obliquely of said chamber and inter
pressor unit and carried thereby, means for con
mediately of the angle between said~ top wall and
veying cooling ?uid ?rst through said condenser - said one vertical wall, said coil having heat
and then through said cooling coil, and- means for
resiliently supporting the motor-compressor unit.
7, A unit air conditioner comprising a housing
structure of horizontally elongated form and
comprising upper ‘and lower horizontally elon
gated compartments, an elongated motor com
pressor unit disposed horizontally in said lower
transfer surfaces arranged transversely thereof
to assist in changing the direction of the air from
the direction in which it enters through the inlet
to the direction‘ in which it leaves through the
outlet.
MILTON KALISCHER.
40
DISCLAIMER
2,125,727.—~Milton Kalt'scher, Spring?eld, Mass. _AIR CONDITIONING APPARATUS.
Patent dated August 2, 1938. Disclaimer ?led January 20, 1939, by the
assignee, Westinghouse Electric ch Manufacturing Company.
Hereby enters this disclaimer to the subject matter of claim 2 in said speci?cation
except unit air conditioners wherein the cooling passage extending about the ?uid
tight casing is formed by a structure which is separate "from and within the lower
compartment.
[O?tcial Gazette February 14, 1939.]
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