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Патент USA US2127046

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Aug. 16, 1938.
Filed Dec. 17, 1934
Patented Aug. 16, 1938
Lawrence M. Persons, Des Moines, Iowa, as‘signor
to Penn Electric Switch 00., Des Moines, Iowa,
a corporation of Iowa
Application December 17, 1934, Serial No. 757,884
1 Claim. (Cl. 236-91)
An object of my invention is to provide an air blower is discharged through the discs before
circulating system especially adapted for a room
it enters the duct 22.
cooler installation, having automatic but simple,
The discs 26 dip in water 30 contained in a
receptacle 32. The water is cooled by a cooling
coil 34 connected with a cooling coil 36 for the Cl
air stream, and both of these coils being con
durable and inexpensive means for freshening
the circulated air.
Still a further object is to provide in connec
tion with a room cooler apparatus an automati
cally operable air ?ow controller for using out
side air' whenever it is cooler than the inside air
10 being circulated.
Still another object is to provide in connection
- nected with a refrigerant compressor 38.
At 40,
with a room cooler, a fresh air intake and a
the condenser of the compressor is shown while
at 42, the motor for the compressor is illustrated.
The parts 20 to 42 just described form no part
of my present invention and have been but brief
ly referred to. The unit A and the refrigerating
damper means operable to permit air to be
taken in from either the room or through the
15 fresh air intake, a differential thermostat being
pending application, Serial No. 651,521, ?led
,January 13, 1933, Patent No. 2,054,039. Suitable
damper, depending on whether the fresh air is
cooler than the inside air or vice versa.
Still another object is to provide a time con
troller operable for any selected period of time
to cause intake of fresh air, regardless of the
mechanism are disclosed in detail in my co
controls, of course, are provided for the motors
24, 28 and 42 in accordance with the require- ,
ments for circulation, dehumidi?cation of the
circulated air and refrigeration for the cooling
coils 34 and 36 respectively, but these are not
shown on the drawing.
position of the differentially operated thermo
My present invention has specifically to do
With these and other objects iniview, my in
with the apparatus which I will now describe;
A freshT‘air intake is illustrated at 44. A
damper 46 is pivoted at 48 and adapted to nor
mally assume the full line position, so that the
air drawn into the duct ill will come through
the register I4 and the intake l6, while when in
the dotted line position, the air will enter from
vention consists in the construction, arrange
ment and combination of the various parts of
my air circulating system, whereby the objects
contemplated are attained, as hereinafter more
fully set forth, pointed out in my claim, and
illustrated in the accompanying drawing, in ' the outside of the building through the fresh
air duct 44.
The ?gure is a diagrammatic view of a room
Any suitable mechanism may be used for op
erating the damper 46 and automatically con
cooler installation with my air circulating sys
trolling its position.
tem associated therewith, and includes an elec
I have shown a heat motor 3 comprising an 3,5
tric, diagrammatic. illustration of the circuit for
the apparatus.
expansible bellows 50, a boiler 52, and a resist
On the accompanying drawing, I have used ance or heating element 54, operatively con
the reference numeral ID to indicate generally a
room or other enclosure through which air is
40 to be circulated. A register is shown at l2 for
discharging air into the room I0, while an outlet
nected with the damper 46.
The bellows and
boiler are ?lled with volatile ?uid, which will
volatilize when the heat element 54 is energized
for expanding the bellows.
The operative con
register is indicated at 14. The register l4 com
municates with an intake l6 of a return duct
nection mentioned comprises a lever 56 pivoted
l8, leading to an air conditioner unit A.
bellows 50, while its other end is connected by a
at 58 and having one end connected with the
unit A includes a blower '20, which draws air‘ link 60 with an arm 62 of the damper 46.
When the heating element is de-energized, the
parts will assume the full line position while
when it is energized, they will assume the dotted
line position.
For controlling the energization of the heater 50
54 automatically, I provide a differential ther
from the duct l8 and discharges it into a duct
22, which in turn is connected with the reg
ister I2.
The air conditioner unit A includes a cooling
and dehumidifying mechanism, which will now
be brie?y described.
A motor 24 drives the blower 20.~ Surround
ing the blower 20 are a plurality of discs 28
driven by a motor 28. The air taken in by the
mostat C. It comprises a pair of expansible
bellows 64 and 66 operating on opposite sides
of a switch arm 68. The bellows 64 has a tem
perature responsive bulb 10 located in a bulge 12 65
of the intake it, while the bellows 66 has a
temperature responsive bulb 74 located in a bulge
?6 of the fresh air intake ML. The bulge ‘£6 per
mits air to ?ow past the bulb ‘i4 when the
damper is in the full line position as indicated
by the arrow Na, and likewise the bulge ‘i2
permits air as indicated by the arrow 10a to
flow past the bulb 10 when the damper 46 is in
the dotted line position.
When the temperatures affecting the bulbs W
lector ring Gil. Contacts 82 are adapted to con
tact with the disc and the collector ring. The
disc is normally retained with a projection 84
against a stop 86, by a spring or other suitable
mechanism, but can be manually rotated clock~
wise, whereupon the spring will return it to its
initial position, retarded, however, by‘ suitable
clockwork mechanism, such as fully described in
my co-pending application, Serial No. 737,059,
?led July 26, 1934. Thus the timing controller
and ‘M are equal, the switch arm 68 will remain
in the open circuit position. Also when the tem
perature affecting the bulb ‘M is greater than the
F can be set for any number of hours or other
temperature affecting the bulb 10, the switch will
remain open. When the temperature affecting
the bulb 70 is greater than that affecting the bulb
15, however, the switch will close, whereupon the
position of the damper 46 will be changed, due to
the operation of the damper motor B.
The circuit when the switch arm 68 is in the
86 is moved away from the stop 86, and such
connection will continue during the desired
period of time.
The contacts 82 when connected with the col
lector ring 80 supply current from the supply
wire D through a wire e to the heating element
54 independent of the differential thermostat C.
This will accordingly change the position of the 20
damper 46, so that fresh air will be taken into
the duct I8 during the period ‘of time for which
the controller F has been set.
Thus the contingency mentioned can be taken
care of by the controller F, or other contingencies 25
closed position can be traced from one current
supply wire D through contacts 69 of the differ
ential thermostat C and then through a wire d
and the heat coil 54 to the other current supply
wire indicated at E. This, of course, will ex
pand the bellows 50, so that the damper 46
will assume its dotted position.
From the foregoing description, it will be ob
vious that during a normal summer day, re
30 circulation of the air through the room It] will
be accomplished and the unit A will cool and
dehumidify it. Air recirculated in this manner
needs freshening after some 14 or 16 hours period
under normal conditions, and sometimes needs
freshening oftener than that. By providing the
units of time, the contacts 82 being connected
by the collector ring 80 as soon as the projection
such as when there is a gathering in the room
Hi, consisting of a considerable number of people,
and it is desired therefore to take in fresh air for
some desired period of time.
Some changes may be made in the arrange 30
ment and construction of the various parts of
my system, without departing from the real
spirit and purpose of my invention, and it is my
intention to cover by my claim, any modi?ed
differential thermostat this freshening is accom
forms of structure or use of mechanical equiva
plished because during the night time, the outside
lents, which may be reasonably included within
air becomes cooler than the air being circulated
through the room. v'I'hereupon the differential
thermostat C will close, and thus air would be
taken in through the fresh airintake 44 instead
of through the intake I6.
This accomplishes two purposes. It freshens
the air and it utilizes the cooler outside air to
cool the room It], instead of having to use the
conditioner unit A for this purpose during the
their scope.
I claim as my invention:
In an air circulating system, a room, air cir
If it so happens that the night is so warm
that it does not close the differential thermostat
50 or closes it for a period of time which is of in
su?icient length to freshen the air, then it is
desirable to manually control the damper 46.
This is accomplished by the following described
The timing controller F is illustrated, which
comprises a disc ‘E8 of insulation having a col
culating means having an intake and an outlet, 40
each communicating with said room, an auxiliary
intake for receiving outside air, a damper for
selectively causing air to be taken into said air
circulating means from said ?rst or said auxiliary
intake, and a controller having two independent
elements, one in and thereby responsive to the
temperature of the air in one of said intakes and
the other in and thereby responsive to the tem
perature of the air in the outer of said intakes
for controlling said damper, and means for caus 50
ing a small quantity of air to flow through one >
of said intakes surrounding the temperature re
sponsive element therefor when air is being taken
in through the other intake and vice versa.
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