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Патент USA US2131103

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Sept. 27, 1938.
-
J. A. HEIDBRINK
CONTROL FOR THERAPEUTIC AIR CONDITIONERS
Filed Jan. 17, 1936
Fig '1.
2,131,103
Patented Sept. 27, 1938
2,131,103
UNITED STATES PATENT OFFICE.
2,131,103
CONTROL FOR THERAPEUTIC AIB. CONDI
TIONERS
`Jay A. Heidbrink,llVl'inneapolis, Minn., assignor
to The Ohio Chemical and >Manufacturing
Company, Cleveland, Ohio
Application January 17, 1936, Serial No. 59,577
6 Claims.
My invention relates to controls for thera
peutic air-conditioners, and has for its object
to determine and regulate recirculation of air
through the soda lime chamber and the amount
5 of air going through the cooling chamber and
(Cl. 12S-191)
line 3--3 of Fig. 1. Fig. 4 is a fragmentary »side
elevation view showing the regulating control
from there in a closed circuit through a breathing
chamber such as an oxygen tent, hood or the
like, and back to the soda lime chamber.
It is well-known in therapeutic practice to pro
10 vide in certain cases a breathing arrangement for
a patient such that the air which he breathers
may be previously treated, as, for example, by
having oxygen added thereto, and such air is
continuously circulated in a closed circuit. One
15 form of such breathing arrangement is what is
known as an oxygen tent, being a tent-like en
closure about the head and upper part of the
body of the patient and an artiñcial circulation of
air is caused to move into and out of said en
20 closure. In conditioning this air, in addition to
the supply of oxygen or other medicinal gases, it
is necessary to remove carbon dioxide, for which
reason the closed circuit of air is passed through
a body of soda lime for taking out the carbon
25 dioxide. It is also customary and desirable to
cool the air in this circuit by by-passing it
through a body of ice or other refrigerating coils,
this cooling being particularly desirable in hot
weather and in conjunction with cases wherein
30 the patient is suffering from fever.
It is, how
ever, at times desirable to restrict the rate of
_flow of air or air mixture to the patient after
going through the ice, as where a patient has a
small tent member which substantially encloses
35 only the head of the patient. In such cases it
may also be desirable to increase the amount
of travel of the gas through the soda lime solu
tion.
It is the object of my invention to provide
40 means for regulating from a given blower the
volume of gas which passes through the cooling
handle. Fig,v 5 is an enlarged sectional detail
showing the manner of securing the damper to
the damper rod.
'
.
As illustrated, an inner casing I 0 is spaced from
an outer casing II and within said space is in
sulating material I2.
A partition I3 across its
narrower dimension divides this casing into an
ice chamber I4 and a soda lime chamber I5. A 10
body of ice I 6 is placed in the ice chamber or
cooling chamber, or, if desired, refrigerator coils
not shown may be substituted for the ice I6. As
clearly shown in Fig. 1, the partition I3 does not
reach to the floor of casing IIJ, but is spaced
therefrom as indicated at I1. Within the soda
lime chamber I5 a second partition I8 is spaced
from partition I3, as indicated at I9, and termi-r
nates so as to leave an opening into the top of
chamber I5, as indicated at 20, and terminates 20
at the bottom short of the iioor of casing IIJ, as
indicated at 2| .` Within the chamber I5 is lo
cated a removable container 22 provided with
reticulate walls and a reticulate` bottom wall 23,
and ñlled With soda lime, indicated at 24. Lo-. 25
cated below the reticulate bottom 23 of the soda
lime container 22, is a blower 25 which is driven
by the motor. 26 controlled by switch 21. 'I‘he
blower 25 is, as clearly shown in Fig. 2, posi
tioned to draw air through the side central port 30
28 and discharge it through ports 29 into a bot-tom chamber 30 opening through the port I'I into
the bottom of ice chamber I4 and into the bottom
of passageway I9.
Y,
Upon a shaft 3I extending across the casings 35
I0, II at the bottom of partition I3 is rigidly se
cured a damper plate 32 which swings into cham
ber 30 between openings I'I below partition I3
and the lower end of passageway I9, as clearly
shown in Fig. 1. Upon the end of shaft 3| out 40
side of casing Il is a handle 33 about which the
chamber and to the patient, and at the same
time to provide means for causing a recirculation
of gas through the soda lime.
'I‘he full objects and advantages of my inven
tion will appear in connection with the'detailed
description thereof, and its novel features are
shaft 3| and damper 32 are operated, and this
handle cooperates with a detent scale member 34
by which the damper may be set in position to»
close passageway I1 or passageway I9, and in any 45
intermediate position, as that shown in full lines
particularly pointed out in the claims.
In the drawing, illustrating an application of
When the blower is placed in operation air is
drawn through pipe 35 and port 36 into chamber
I 5, whence it passes through the soda lime 24 and 50
soda lime container 22 and through the blower
and -is discharged into chamber 30. If the damper
32 is in the upper dotted-line position completely
50 my invention in one form,
Fig. 1 is a sectional elevation view of the soda
lime and ice chamber taken on line I--I of Fig. 2.
Fig. 2 is a sectional elevation view at right angles
to what is shown in Fig. 1 taken on line 2-2 of
Fig. 1. Fig. 3 is a sectional plan view taken on-
in Fig. 1.
'
closing the opening into discharge passageway I 9, all of this air will pass through the ice in the ice
2,131,103
2
chamber f4 and through port31 and a connecting
pipe to the chamber of the oxygen tent or hood,
not shown, whence it will return through pipe 35
to chamber I5, thus setting up a closed circulation.
Ul
If the damper 32 were dropped to the lower
dotted-line position all of the air would merely be
recirculated through passageway I9 and chambers
I5 and 30 and the circulation through the tent or
hood would stop.
If, however, the damper 32 is placed in a se
lected intermediate position such as that shown in
full lines in Fig. 1, a part of the air from the blow
er 25 will go through the chamber I4 and the ice
therein, and into the delivery side 31 of the closed
circuit through the tent or hood and another part
of said air will pass through by-pass passageway
I9 and cause the gas mixture to be recirculated
through the soda lime.
The advantages of this arrangement will be ap
parent from the foregoing description thereof.
The same air-conditioning means contained in
casings I0 and I I may be employed to meet dif
ferent conditions of use, such as with a large tent
or in very hot weather when maximum cooling
25 and flow of air mixture in the closed circuit is re
quired, or where a small hood is placed over the
patient and a smaller amount of air mixture and
less cooling is requisite. Furthermore, the re
circulation through the soda lime chamber of a
30 part of the air mixture will insure completely eili
cient removal of CO2 from` the reduced air
stream, giving the patient a properly purified air
mixture for breathing. l The construction is very
simple and adds little to the cost of the air-condi
35 tioning device, and has proved in practice to be
absolutely accurate and dependable.
I claim:
`
1. An air-conditioner for therapeutic purposes
embodying a soda lime chamber and a cooling
40 chamber with an opening connecting said cham
bers, a blower adapted to establish a closed cir
cuit of air mixture successively through the soda
lime chamber and the cooling chamber, means in
terposed between said chambers for by-passing
some of said air mixture to cause it to recirculate
through the soda lime chamber, and means asso
ciated with said by-pass means for regulating the
amount of the air mixture recirculated through
.
3. An air-conditioner for therapeutic _purposes
embodying a soda lime chamber and a cooling
chamber with an opening connecting said cham
bers, a blower adapted to establish a closed cir
cuit of air mixture successively through the soda,
lime chamber and the cooling chamber, a parti
tion forming a passageway opening at the top and
bottom of said soda lime chamber to permit by
passing of part of said gas mixture to recirculate
through the soda limeA chamber, and a damper in
the opening between the soda lime chamber and
the cooling chamber for determining the amount
of said recirculation.
15
4. An air-conditioner for therapeutic purposes
embodying a soda lime chamber and a cooling
chamber withy an opening connecting said cham
bers, a blower adapted to establish a closed circuit
of air mixture successively through the soda lime 20
chamber and the cooling chamber, a partition
forming a passageway opening at the top and bot
tom of said soda lime chamber to permit by-pass
ing of part of said gas mixture to recirculate
through the soda lime chamber, a damper in the 25
opening between the soda lime chamber and the
cooling chamber for determining the amount of
said recirculation, and means for setting the
damper to fix the amount of said recirculation’ as
30
so determined.
5. An air-conditioner for therapeutic purposes
embodying a soda lime chamber and a cooling
chamber with an opening connecting said cham
bers, a blower adapted to establish a closed circuit
of air mixture successively through the soda lime
chamber and the cooling chamber, and means for
by-passing some of said air mixture to cause'it to
recirculate through the soda lime chamber, said
means including means to determine and regu
late the amount of said air mixture so by-passed.
6. An air-conditioner for therapeutic purposes
embodying a soda lime chamber and a cooling
chamber with an opening connecting said cham
bers, a, blower adapted to establish a closed cir
cuit of air mixture successively through the soda
lime chamber and the cooling chamber, a parti
tion forming a passageway opening at the top and
2. An air-conditioner for therapeutic purposes
bottom of said soda lime chamber to permit by
passing of _part of said gas mixture to recirculate
through the soda lime chamber, a damper in the
embodying a soda lime chamber and a cooling
opening between the soda lime chamber and the
the lime chamber.
50
mixture to recirculate through the soda lime
chamber.
i
chamber with an opening connecting said cham
cooling chamber for determining the amount of
bers, a blower adapted to establish a closed cir
said recirculation, a handle outside of said casing
for moving said damper, and a detent scale coop
erating with said handle to iix the damper for
eñ'ecting the amount of said recirculation as so
_cuit of air mixture successively through the soda
lime chamber and the cooling chamber, and a
double-walled partition y:forming a passageway
opening at the top and bottom of said soda lime
chamber to permit by-passing of part of said gas
determined.
JAY A. HEIDBRINK.
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