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Патент USA US2077554

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April 20, 1937.
Filed April 50, 1932
Patented Apr. 20, 1937
Walter L. Fleisher, New York, N. Y.
Application April 30, 1932, Serial No. 608,392
2 Claims. (Cl. 261-11)
This invention relates to systems and methods amount of heat which must be absorbed by the re
for ventilating and air-conditioning and par
ticularly to systems for maintaining proper air
conditions for human comfort and health._
An object of the invention is to’improve the
economy of operation of air-conditioning systems.
A further object of the invention is to provide
an air-conditioning system which will meet the
rigid requirements of systems for household use.
In the case of ventilating and air-conditioning
for comfort, the problem is not only one of main
taining the proper conditions of temperature,
humidity and purity of the air within the in
frigerating system but also that heat is utilized
for the useful purpose of superheating the leav
closure being ventilated, but also of maintaining
tem when such is used, but also can be operated
to take advantage of the inherent economy of
cooling by evaporation, and since it reduces the
15 the condition of the circulated air such that it
will readily mix with the air in the inclosure
without producing disagreeable air currents.- In
this respect there are introduced di?lculties not
encountered in industrial installations where the
20 circulated air can be intensively conditioned, the
chief requirement being that the total mixture
in the inclosure should be at the desired condi
tion. On the other hand in systems for comfort
work the temperature and humidity of the circu
25 lated air must be maintained within a rather
de?nite, narrow margin of difference from the
| conditions of the air in the room. As a result,
there must be employed a large volume of air not
intensively conditioned, in order that the mixture
30 in the inclosure be at the desired condition. _
In comfort systems the problem, particularly
‘in the summertime, is one of d'ehumidifying and
cooling. In dehumidifying apparatus the air is
cooled to a point below the dew point tempera
35 ture of the air to be conditioned so as to precipi
tate a part of the water vapor, the leaving air
being substantially saturated. In this way the
dew point temperature (1. e., the water vapor
content of the air) can be accurately regulated
ing air so that it is in a proper condition for
In accordance with another feature of this in
vention, the air is conditioned in a combined
interchanger and washer so arranged that the
heats of the air to be conditioned and the air
leaving the washer proper are interchanged with
out affecting the .water vapor content of the
leaving air. This apparatus not only produces .
a reduction in the load on the refrigerating sys
refrigeration requirements, permits such opera
tion under conditions when this would ordi
narily be impossible.
.Applicant’s arrangement not only superheats 20
the air' leaving the washer chamber but also re
duces the wet bulb temperature of the air entering
the washer chambers so that the amount-of heat
which must be absorbed therein is greatly re
duced, thus greatly reducing the load on the
refrigerating system. The result is that in the
early part of the cooling season, city water which
has not yet risen in temperature may be utilized
without resorting to arti?cial refrigeration.
Further, the system may be used to take ad
vantage of the natural economy of cooling by
evaporation. ‘In such a method of operation the
water is recirculated without refrigeration and
the air leaving the washer approaches saturation
at the wet bulb temperature of the air entering
the washer proper. In the usual type of condi
tioner this method of operation can only be em—
ployed when the outside wet bulb temperature
is at or below the dew point temperature re
quired in the house. However, with my system, 40
the total heat of the air and consequently the
wet bulb temperature is reduced before'the air
dew point temperature required to give the_ enters the washer boxes.
Thus, heat is absorbed from the incoming air
practically absolute limits of 30 to 70% relative‘
by the air leaving the washer proper, the rate of
45 humidity necessary for comfort conditions dif
fers widely in temperature from the air in the heat interchange and consequently the amount of
room and will not readily mix therewith. As a heat absorbed being a function of ‘the tempera
result the air leaving the dehumidi?er must be ture difference. This temperature difference is
a function of the temperature of the air leaving
superheated before it can be circulated.
In accordance with a feature of my invention, the washer proper which is determined by the
advantage is‘ taken of these facts and there is wet bulb temperature of the air entering the.‘
washer proper. Since this wet bulb temperature
produced a heat transfer (or interchange) be
tween the air entering the dehumidi?er and the is in turn controlled by the heat absorption from
leaving air. In this way not only is the air cooled the incoming air, there is produced a cumulative
55 so as to reduce to a very marked extent the effect which is in effect continuous up to an
40 to the point required for the circulated air. At
the same time a cooling effect is produced. How
ever, the air, being substantially saturated at the
' equilibrium point.
The amount of heat inter
change produced is of course controlled by the
dimensions and length of the interchanger pas
Sages and the kind of metal used.
5 Consequently, advantage may be taken of the
economy of cooling by evaporation even when
the wet bulb temperature of the outside air is
considerably above the desired dew point tempera
ture. In other words, the conditioner‘ of my in
10 vention operates without the use of refrigeration
to give air having a dew point temperature below
i the wet bulb temperature of the incoming air.
In the larger portion of the temperate zone the
atmospheric conditions are such that this method
15 of operation can be utilized throughout a large
part of the cooling season. The only operating
expense being for the comparatively nominal
power consumption of the motors for driving the
fans and water circulating pump. In fact for
20 night use it is only very rarely that the wet bulb
temperature is far above the dew point tempera
ture desired for pleasant cooling.
These and other objects and features of the
invention will be more apparent from the follow
25 ing description to be read in connection with the
accompanying drawing in which:
Fig. 1 is a cross sectional view of an embodi—
ment of the invention; and
Fig. 2 is a sectional view taken on the line 5—5
‘ 30 of Fig. 1.
Figs. 1 and 2 show an embodiment of the com
bination washer-interchanger type air condi
tioner of my invention which is particularly suit
ed to installations in which space requirements
35 are a controlling factor.
This-conditioner is of
very compact form and is readily adaptable for
use in air conditioning systems for railway cars,
for example. 'For such installations, it could be
constructed of such size as to be mounted on the
40 roof, in the vestibule, or other convenient place.
Referring to Figs. 1 and 2, the conditioner
comprises a series of nested cylindrical units 60,
6|, 62 and 63 made of sheet metal such as copper
and suitably spaced apart so that the spaces be
45 tween the adjacent cylindrical walls form the
interchanger air passages. The left hand end
of the unit 66 is ?ared out at 64 to form an air
inlet in which an air ?lter 65 is mounted. The
right hand end of the unit 60 is closed off by a
at circular plate .66.
The left hand end of the unit 6| is connected
by means of a suitable'pump (not shown).
pipe 11 provides means for draining oil the water
from the washer chamber 63 to be recirculated
by the pump.
The arrows-indicate the direction of the air
circulation. Thus, the air entering through the
?lter 65 passes through the air passage formed
between the walls of the units 60 and BI , through
the passage between the plates 66 and 69 into the
passage between the walls of the units 62 and 63 10
and through that passage to the entrance to the
washer chamber 63. Here it is subjected to the
action of the sprayed water and passes out
through the eliminator 14 and ducts 13 to the
air passage formed between the walls of the units
6| and 62 and through that passage to the duct
68 leading to the fan intake.
In operation the air in the passages leading to
the washer chamber is cooled through the inter
change of heat with the air in the adjacent pas
sages leading from the washer chamber,'while
the latter air is superheated by the same action.
Further, the inlet passages, carrying the warm
er air, are formed on the outer'surface of the
conditioner thus serving as insulation for the
washer proper and other passages carrying cooler
This embodiment of my invention is shown
in the drawing in a simpler form but it should
be understood that it may be variously modi?ed
without departing from the spirit of my inven
tion as illustrated thereby. Thus, if greater in
terchange is required it may be provided by the
addition of other concentric cylindrical units to
form longer air passages. Further, the effective
length of the air passages may be increased by
providing helical plates in the air passages formed
between the cylindrical walls of the units.
Since many modi?cations may be made in the
invention without departing from its scope, ap
plicant intends that the above description and
accompanying drawing be considered as illus
from to form an outlet air passage from said
washer chamber, and a third wall surrounding
said second wall and spaced therefrom to form
in which the sprayed water collects. Five cylin
drical ducts ‘l3 radially mounted from the cylin
65 drical surface of the unit 63 connect that unit
with the air passage‘ between the walls of the
units 6| and 62. Eliminators 14 remove'the en
trained water from the air leaving the washer
chamber unit 63.
Water is sprayed into the washer chamber unit
63 through the pipe 15 and the spray nozzles 16
air passage to said washer chamber, a second 50
wall surrounding said ?rst wall and spaced there
duct 68 which leads to the inlet of the circulating
fan (not shown). An annular plate 69 closes off
55 the right hand end of the passage formed be
tween the walls of the units 6| and 62. A cir
60 by means of a circular plate ‘H and forms the
washer proper. A plate 12 closes off the lower
left hand portion of the unit 63 to form a sump
trative only, applicant limiting himself only as
indicated in the appended claims.
What I claim is:
1. A combined interchanger-washer for air
conditioning comprising a washer chamber, a
?rst wall surrounding the wall of said washer
chamber and spaced therefrom to form an inlet
through a frusto-conical section 61 to an outlet
cular plate 16 closes oft the left hand end of the
unit 62.
The unit 63 is closed off at its right hand end
an inlet passage connected at one end to the ?rst 65
mentioned inlet passage.
2. Air conditioning apparatus comprising a
cylindrical washer chamber having an inlet open
ing and an outlet opening, a cylindrical wall con
centric with the wall of said washer chamber 60
and forming therewith an inlet passage to said
washer chamber, a second concentric cylindrical
wall forming with the ?rst concentric wall an
outlet passage from said chamber, a third con
centric wall forming with said second wall a sec
ond inlet passage connected at one end to the
?rst inlet passage, and radial ducts passing
through the ?rst mentioned inlet passage and
interconnecting said washer chamber and said
outlet passage.
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