US2338382A - Psychrometrically controeled jur - Google Patents

Psychrometrically controeled jur Download PDF

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US2338382A
US2338382A US2338382DA US2338382A US 2338382 A US2338382 A US 2338382A US 2338382D A US2338382D A US 2338382DA US 2338382 A US2338382 A US 2338382A
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heater
evaporator
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/153—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with subsequent heating, i.e. with the air, given the required humidity in the central station, passing a heating element to achieve the required temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
    • F24F3/1405—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification in which the humidity of the air is exclusively affected by contact with the evaporator of a closed-circuit cooling system or heat pump circuit
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F6/00—Air-humidification, e.g. cooling by humidification
    • F24F6/12—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air
    • F24F6/14—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air using nozzles
    • F24F2006/146—Air-humidification, e.g. cooling by humidification by forming water dispersions in the air using nozzles using pressurised water for spraying

Definitions

  • This invention relates to'the conditioning of 'air and relates more particularly torair conditioning systems and to automatic controls therefor for maintaining desired relative humidities :and
  • Objects .of 'this invention are .tomaintain .a substantially constant relative humidity ,fllldfi substantially constant dry bulb temperature in the" air in an air conditioned; space.
  • the centrifugal fan 5 driven;by:the;e-lectric motor 6 draws in fresh outdoor air through the inlet 1.
  • the fresh air passesinthe order; named, through the preheater 8, betweenthe dampers 9,.vthrough the plenum; chamber l0,,the;fi;1ters II, the sprays from .thelair washerrnozzles 12-,
  • the conditioned air is dischargedthrough 1,,the duct ll into the conditionedspacew.
  • Air recirculatedv from the space 18 isj-dra-wn by the suction of the fan 5 through the, dl 9t l 9, and when the by-pass dampers, 20 inthe by pass duct 2
  • the byrpass air serves to-revheat the chilled air for tempering purposes,-and asaving in refrigerationis affectedby recircm lating air from the space served, throughgthe conditioner since the condition of the ,recirculated air is usually nearer the .desired conditign than the outdoor air.
  • ITheIGVaPOmtOI ;I may be of wellyknowmcom struction :consisting :of 1a cpluralitygof :nelatively closely]spaceds'horizontal-ztubes PIQW-dQdlWlth-ZQX- tended zsurface fins, with interconnected return bends ;and.; inlet and ioutlet :headets.
  • the @dry bulbethermostat 3 I and the; hy ostat 132 control -the -,o era.tion of.1.t systemnthr u h compressed .air r'from; :the, source 313,.sup31ied3to these control instruments .through... the r ne 53. 4,.
  • the dash-dot 1 lines z-indioaterair tubesl connecting the control instruments and the .diaphragni type motors controlledcbycthem.
  • the motorditi is actuated by the thermostat fl to adjust the-steamvalve fmwh-ich is normally closed.
  • the motor -38 is biasedto operate to open the valve 30- ;at-an air pressure b'etween nine andthirteen pounds.
  • the motor 43 is actuated by the thermostat 3
  • the motor 43 is biased to open the dampers 20 at an air pressure between four and nine pounds.
  • the motor 44 is actuated by the thermostat 3
  • the motor 44 is biased to close the dampers l5 at an air pressure between four and nine pounds.
  • the solenoid 45 is connected to the electric circuit of the motor 6 so that when the switch 46 is opened for disconnecting the motor 6 from the electric source 41, the solenoid 45 is deenergized and closes the valve 48 in the air tube 34 connecting the air source 33 with the control instruments. This causes the motor 49 to close the normally open fresh air dampers 8.
  • the hygrostat 32 is of the reverse acting type designed to pass air to the motors it controls .on a falling relative humidity, If the relative humidity in the conditioned space I8 starts to fall below the desired condition which, for example,
  • the hygrostat may be 65%, the hygrostat will start gradually to pass air to the various motors it actuates.
  • the refrigerant suction valve 25 When the air pressure released by the hygrostat reaches four pounds, the refrigerant suction valve 25 Will be gradually closed by the motor 50 and when the air pressure reaches eight pounds, the valve 25 will be fully closed thus, completely shutting off the refrigeration. If this is not sufficient to raise the relative humidityin the space IS, the hygrostat will continue to pass air fand .at seven pounds pressure the spray control valve 38 will begin to be opened by the motor 4
  • a water heater supplied with steam from the source 26 couldbe used for heating the water supplied to the spray nozzles I2.
  • valve stop adjusted so that the valve may ,be almost but not completely closed. This will prevent the usual low pressure control fromshuttine down the compressor, if a local, individual compressor is used, and will result in the compressor being in condition for immediate action when the hygrostat or thermostat calls'fo'r refrigeration.
  • is also of the re verse acting type designed to pass air to the motors it controls, upon a falling temperature.
  • the thermostat will start to pass air and when the air pressure has reached four pounds, the face dampers l5 will start to be closed by the motor 44 and the bypass dampers 20 will start to be opened by the motor 43, When the air pressure has reached nine pounds the face dampers l5 will be fully closed. If this does not raise the dry bulb temperature, the thermostat will continue to pass air and when the air pressure reaches nine pounds, the reheater steam valve 30 will start to be opened by the motor 33 and when the air pressure reaches thirteen pounds, the valve 30 will be fully open.
  • An air conditioning system comprising an air heater, an air washer, an air cooling refrigerant evaporator, and including .means for moving air to be conditioned through said heater, said washer and said evaporator and for supplying it into the space to be conditioned, a heating fluid source connected to said heater, a water source connected to said washer, a refrigerant source connected to said evaporator, and means including means responsive to changes in the relative humidity in said space for first decreasing the supply of refrigerant from said refrigerant source to said evaporator, for next initiating the supply of water from said water source to said washer, and for next initiating the supply of fluid from said heating source to said heater, upon a fall in relative humidity in said space below the desired level.
  • An air conditioning system comprising an air heater, an air washer, an air cooling refrigerant evaporator, and including means for moving air to be conditioned through said heater. said washer and said evaporator and for supplying it into the space to be conditioned, a heating fluid source connected to said heater, a water source connected to said washer, a refrigerant source connected to said evaporator, and means including means responsive to changes-in the viii Ha. tau-Ll). .n,-.
  • lr rinsin relative humidity in said-space for: first decreasring ithe supply of refrigerant from said refrigaerant source tosaid evaporator from a maximum to a minimum upona fall in-the' relative humidity "itch-maximum, andsvthen if-the relative humidity ris-"not restored, for initiating the supply of fluid .from said heating 'source-and regulating it from a minimum to a maximum.
  • An airconditioning 'systemwomprisingr an air heater I an air washer, an air cooling refrig- Ferant evaporator and including means for movdag air 'to' be” conditioned-through said heater, rsaid washer "and -said evaporator and forsup- :plyingit into the space to be conditioned a-heatsource--connected--to said washer, a refrigerant source connected to said-evaporator, and 'means including means responsive to changes in -the relative-humidity in said spacefor first decreasing'fiuid source-connected to said heater,a Water :ing the a supply of refrigerant from-said refrig- 11' '1; erant source to said evaporator-froma maximum rto a minimum upon afallin the relative humidity in said space-below the desired level, for then if the relative humidity is not restored,- initiating the supply of waterfrom said-water source to t
  • An air conditioning system comprising an air cooling refrigerant evaporator, an air heater on the downstream side of said evaporator, face dampers for bypassing air from said evaporator around said heater, a duct conducting air from the conditioned space as bypass air to the downstream side of said heater, a duct damper in said duct, said system including means for moving air through said evaporator and heater and for supplying it into the space to be conditioned and for moving air from said space through said duct, and means including a thermostat responsive to temperature changes in said space for first decreasing the supply of refrigerant to said evaporator, for next adjusting said face dampers towards closed position and adjusting said duct damper towards open position, and for next admitting a heating medium into said heater upon a fall in the temperature in said space below the desired level.
  • An air conditioning system comprising an air cooling refrigerant evaporator, an air heater on the downstream side of said evaporator, face dampers for bypassing air from said evaporator around said heater, a duct conducting air from the conditioned space as bypass air to the downstream side of said heater, a duct damper in said duct, said system including means for moving air through said evaporator and heater and for supplying it into the space to be conditioned, and for moving air from said space through said duct, and means including a thermostat respon ir iii-temp rat e, a e in.
  • An air tconditioning system comprising (an air :cooling refrigerant evaporator, an air. he tier mngtheidow s am side of ai e a ora es, ,ldam-persdo-r bypassing; air from said evaporator tarollnd.
  • An air conditioning system comprising a humidifier, an air cooler, an air heater at the downstream side of said cooler, face dampers for bypassing air from said cooler around said heater, a duct for conducting air from the conditioned space as bypass air to the downstream side of said heater, a damper in said duct, said system including means for moving air through said humidifier, cooler and heater and supplying it into said space and for moving air from said space through said duct, means including means responsive to changes in the relative humidity in said space for first decreasing the effectiveness of said cooler, upon a fall in the relative humidity in said space, from a maximum to a minimum, and then if the relative humidity is not restored, initiating the action of said humidifier and then increasing its eifectiveness from a minimum to a maximum, and means including a thermostat responsive to temperature changes in said space for first adjusting the supply of cooling medium to said cooler upon a fall in the temperature in said space below the desired level, from a maximum to a minimum, and then if the temperature is not restored for adjusting said damper from minimum open
  • An air, conditioning system comprising a humidifier, an air cooler, air reheating means, said system including means for moving air through said humidifier, said cooler and said reheating means and for supplying it into the conditioned space, means including means responsive to changes in the relative humidity in said space for first adjusting the efiectiveness of said cooler towards minimum upon a decrease in the relative humidity in said space below the desired level and then if the humidity is not restored, for actuating said humidifier, means including a thermostat responsive to temperature changes in said space for first adjusting the effectiveness of said cooler towards minimum, upon a fall in the temperature in said space below the desired level, and then if the temperature is not restored, for initiating the action of said reheating means, and means controlled by said thermostat for preventing said humidity responsive means from decreasing the effectiveness of said cooler when the temperature in said space is above the desired level.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Description

Jan. 4, 1944. c ow 2,338,382
PSYCHROMETRICALLY CONTROLLED AIR CONDITIONING SYSTEM Filed June 23, 1942 Conan/ch50 SPACE UOLVHDdVAJ g g FREON Cbrvamss FROM SuMP gfimeqs C'- Mar/OW a ywal am ui'ibwney Patented Jan. 4, 1944 UNITED STATES PATENT ole-Flor.
1 P SYOHROMETRICALLY OONTRDLLEDJAIR CONDITIONING' SYSTEM James C. Marlow, Atlanta, Ga., ass norf'toiB. F. Sturtevant Company, Boston; Mass.
Application :June 23, 1942,:SeriahllmaMByllM 9 Claims.
This invention relates to'the conditioning of 'air and relates more particularly torair conditioning systems and to automatic controls therefor for maintaining desired relative humidities :and
"drybulb temperatures in the :conditionejd;space. 7'
In the processing of many materials in manufacturing, it is important to maintain agsubstantially constant relative humidity and ;a substantially constant dry bulb temperaturein-the conditioned space at any predetermined setting of the control instruments. In so far as ,is known in all prior. systems while it was possible to maintain'the. relative humidity and dry -.bulb temperature within limits which had tombe accepted as tolerant, .the fluctuations were substantial and undesired.
Objects .of 'this invention are .tomaintain .a substantially constant relative humidity ,fllldfi substantially constant dry bulb temperature in the" air in an air conditioned; space.
--The invention will now be described with reference .to the drawing which illustrates di grammatically an .air 2 conditioning system: embodying this invention.
The centrifugal fan 5 .driven;by:the;e-lectric motor 6 draws in fresh outdoor air through the inlet 1. The fresh air passesinthe order; named, through the preheater 8, betweenthe dampers 9,.vthrough the plenum; chamber l0,,the;fi;1ters II, the sprays from .thelair washerrnozzles 12-,
between the finnedtubes/of the evaporator l3, through thereheater I4, between the face dampers l5 when they are open, into the plenum chamber I6; and then into the inlet of; the ian,5. The conditioned air is dischargedthrough 1,,the duct ll into the conditionedspacew.
Air recirculatedv from the space 18 isj-dra-wn by the suction of the fan 5 through the, dl 9t l 9, and when the by-pass dampers, 20 inthe by pass duct 2| are open, a portionof the, recirculated air passes as by-pass air into the plenumchamber l6 for mixture, with the, chilled,,dehumi di fied air from the evaporator I3.
-Another portion of therecirculated air from the duct I9 is drawn'into the plenum chamber Ill and passes with the recirculated air through the abovedescribed apparatus located, between the plenum chamber H1 and the space l8. v
As is well known the byrpass air.serves to-revheat the chilled air for tempering purposes,-and asaving in refrigerationis affectedby recircm lating air from the space served, throughgthe conditioner since the condition of the ,recirculated air is usually nearer the .desired conditign than the outdoor air.
ITheIGVaPOmtOI ;I may be of wellyknowmcom struction :consisting :of 1a cpluralitygof :nelatively closely]spaceds'horizontal-ztubes PIQW-dQdlWlth-ZQX- tended zsurface fins, with interconnected return bends ;and.; inlet and ioutlet :headets. zenitable fivolatile :refri'gerant zlsllch :Las '-Ereon :is supplied dram :the ccompressorecondenser 2 .through-i-thexpipe #23:and-iis;returnedgthmu h lt h suction pipe :241and the: suction .-va1v e:.-';25.
steamifrom .Lthe;sourcerflfigis supplied :throu hthe rpipecfllxand (the valve? :to; the rzpr heat rc andithroughtthetpipe 52,9 rand waivevto ,the;-re-
heater [4, r s I lTne 'pulnp' 31; recirculates sprayewaterifromathe sump F tnot illustrated) :uncierwthespray :noz zles and evap.0ra.tor n3, rthrough 13118 valve 3 ahepipei39 and;theynozzlessl2. Thewwate fllom Q nozzles :12 vpreterably sprays;upon theaeyaporator, is usualaarfloatfcontrolledgmakerup1mm? supply may-be used.
The @dry bulbethermostat 3 I and the; hy ostat 132 control -the -,o era.tion of.1.t systemnthr u h compressed .air r'from; :the, source 313,.sup31ied3to these control instruments .through... the r ne 53. 4,. The dash-dot 1 lines z-indioaterair tubesl connecting the control instruments and the .diaphragni type motors controlledcbycthem.
'Ihe motor :3 5: is actuated byi :the,hygrostat-32 to adjust the steam valve :.2-8=,-1-Wh ich closed. The motor 35 is biased -to ope'rate to open the valve-=28 at an air. pressurebetween ten and=fourteen-pounds fThe motorditi is actuated by the thermostat fl to adjust the-steamvalve fmwh-ich is normally closed. The motor -38 is biasedto operate to open the valve 30- ;at-an air pressure b'etween nine andthirteen pounds.
an leieh -.pcuud 1'. 11 6 a virqmlthe be describ -a -P en r l1 rh e qs 1 ieatliesu iew y r g 32 .to the motor ,fifi passes through the val wh h i ermal r-t pnen- ;,It.is.eetrel d P di pnra mi yee moto i lmwbi nin trolledfbyethe thermostat, 3 l whichact ei ti ai lel ea ditioned space has dropped to its predetermined temperature.
The motor 43 is actuated by the thermostat 3| to adjust the by-pass dampers 20 which are normally closed. The motor 43 is biased to open the dampers 20 at an air pressure between four and nine pounds.
The motor 44 is actuated by the thermostat 3| to adjust theface dampers l5 which are normally open. The motor 44 is biased to close the dampers l5 at an air pressure between four and nine pounds.
The solenoid 45 is connected to the electric circuit of the motor 6 so that when the switch 46 is opened for disconnecting the motor 6 from the electric source 41, the solenoid 45 is deenergized and closes the valve 48 in the air tube 34 connecting the air source 33 with the control instruments. This causes the motor 49 to close the normally open fresh air dampers 8.
The hygrostat 32 is of the reverse acting type designed to pass air to the motors it controls .on a falling relative humidity, If the relative humidity in the conditioned space I8 starts to fall below the desired condition which, for example,
may be 65%, the hygrostat will start gradually to pass air to the various motors it actuates.
When the air pressure released by the hygrostat reaches four pounds, the refrigerant suction valve 25 Will be gradually closed by the motor 50 and when the air pressure reaches eight pounds, the valve 25 will be fully closed thus, completely shutting off the refrigeration. If this is not sufficient to raise the relative humidityin the space IS, the hygrostat will continue to pass air fand .at seven pounds pressure the spray control valve 38 will begin to be opened by the motor 4|! and when the air pressure reaches eleven pounds the sprays will be full on tending to in! crease the relative humidity of the air. If in -spite of this, the desired relative humidity is not restored, the air pressure will continue to build up and at ten pounds pressure, the preheater steam valve 28 will start to be opened by the motor 35 and when the air: pressure reaches fourteen pounds, the valve 28Qwillwbe -fully open. This causes maximum heatthrough jlthe preheater which results in an increase inthe {dew point. temperature of the air leaving the ,spray from the nozzles l2. 7
Instead of using the air preheater 8 as described for raising the relative humidity of the air, a water heater supplied with steam from the source 26 couldbe used for heating the water supplied to the spray nozzles I2.
Instead of having the valve 25 completely closed as described, itmay be desirable to have the valve stop adjusted so that the valve may ,be almost but not completely closed. This will prevent the usual low pressure control fromshuttine down the compressor, if a local, individual compressor is used, and will result in the compressor being in condition for immediate action when the hygrostat or thermostat calls'fo'r refrigeration. I I
It is to be noted that the operating pressures for the various motors have been overlapped so that each proportioning motor will be in immediate reserve and ready to perform without delay upon demand from the hygrostat.
" The dry'b'ulb thermostat 3| is also of the re verse acting type designed to pass air to the motors it controls, upon a falling temperature. When the dry bulb temperature in the conditioned space 18- starts-to fall below the'control temperature which, for example, may be 70 F., the thermostat will start to pass air and when the air pressure has reached four pounds, the face dampers l5 will start to be closed by the motor 44 and the bypass dampers 20 will start to be opened by the motor 43, When the air pressure has reached nine pounds the face dampers l5 will be fully closed. If this does not raise the dry bulb temperature, the thermostat will continue to pass air and when the air pressure reaches nine pounds, the reheater steam valve 30 will start to be opened by the motor 33 and when the air pressure reaches thirteen pounds, the valve 30 will be fully open.
The valve 4| in the air line from the hygrostat 32 to the motor 50 controlling the refrigerant suction valve 25, is controlled by the thermostat 3| so that the valve 4| is closed preventing the hygrostat from supplying air to close the suction valve 25 when the temperature in the space I8 is above its predetermined setting. When this condition occurs and the relative humidity is too low, the operation of the preheater and the sprays as describedhas been found sufiicient to restore the relative humidity to its predetermined point. a
In a typical installation embodying this invention the dry bulb temperatures and the relative humidities in the conditioned space were recorded on a standard clock driven recording chart and the fluctuations inv the lines drawn were barely preceptible to the eye showing that the desired conditions were maintained substantially constant for all practical purposes.
While the controls have been illustrated and described as being of the air actuated type, electric or other equivalent controls could, of course, be used. 7
While one embodiment of the invention has been disclosed for the purpose of illustration, it should be understood that the invention is not limited to the exact apparatus and arrangement of apparatus illustrated, as modifications thereof may be suggested by those skilled in the art without departure from the essence of the invention.
What is claimed is:
1. An air conditioning system comprising an air heater, an air washer, an air cooling refrigerant evaporator, and including .means for moving air to be conditioned through said heater, said washer and said evaporator and for supplying it into the space to be conditioned, a heating fluid source connected to said heater, a water source connected to said washer, a refrigerant source connected to said evaporator, and means including means responsive to changes in the relative humidity in said space for first decreasing the supply of refrigerant from said refrigerant source to said evaporator, for next initiating the supply of water from said water source to said washer, and for next initiating the supply of fluid from said heating source to said heater, upon a fall in relative humidity in said space below the desired level.
2. An air conditioning system comprising an air heater, an air washer, an air cooling refrigerant evaporator, and including means for moving air to be conditioned through said heater. said washer and said evaporator and for supplying it into the space to be conditioned, a heating fluid source connected to said heater, a water source connected to said washer, a refrigerant source connected to said evaporator, and means including means responsive to changes-in the viii Ha. tau-Ll). .n,-. lr rinsin relative humidity in said-space for: first decreasring ithe supply of refrigerant from said refrigaerant source tosaid evaporator from a maximum to a minimum upona fall in-the' relative humidity "itch-maximum, andsvthen if-the relative humidity ris-"not restored, for initiating the supply of fluid .from said heating 'source-and regulating it from a minimum to a maximum.
' 3: An airconditioning 'systemwomprisingr an air heater, I an air washer, an air cooling refrig- Ferant evaporator and including means for movdag air 'to' be" conditioned-through said heater, rsaid washer "and -said evaporator and forsup- :plyingit into the space to be conditioned a-heatsource--connected--to said washer, a refrigerant source connected to said-evaporator, and 'means including means responsive to changes in -the relative-humidity in said spacefor first decreasing'fiuid source-connected to said heater,a Water :ing the a supply of refrigerant from-said refrig- 11' '1; erant source to said evaporator-froma maximum rto a minimum upon afallin the relative humidity in said space-below the desired level, for then if the relative humidity is not restored,- initiating the supply of waterfrom said-water source to ti said washer and regulating it froma minimum to a maXimum,-and-tiren-=if the relative humidity is not-restored, for-initiating the supply of fluid from said heating source and regulating it from a minimum to a maximum, the regulation of said evaporator, said washer and said heater being overlapped whereby the supply of water to said washer is initiated before the supply of refrigerant to said evaporator has been reduced to a minimum, and the supply of heating fluid to said heater being initiated before the supply of water to said washer has been increased to a maximum.
4. An air conditioning system comprising an air cooling refrigerant evaporator, an air heater on the downstream side of said evaporator, face dampers for bypassing air from said evaporator around said heater, a duct conducting air from the conditioned space as bypass air to the downstream side of said heater, a duct damper in said duct, said system including means for moving air through said evaporator and heater and for supplying it into the space to be conditioned and for moving air from said space through said duct, and means including a thermostat responsive to temperature changes in said space for first decreasing the supply of refrigerant to said evaporator, for next adjusting said face dampers towards closed position and adjusting said duct damper towards open position, and for next admitting a heating medium into said heater upon a fall in the temperature in said space below the desired level.
5. An air conditioning system comprising an air cooling refrigerant evaporator, an air heater on the downstream side of said evaporator, face dampers for bypassing air from said evaporator around said heater, a duct conducting air from the conditioned space as bypass air to the downstream side of said heater, a duct damper in said duct, said system including means for moving air through said evaporator and heater and for supplying it into the space to be conditioned, and for moving air from said space through said duct, and means including a thermostat respon ir iii-temp rat e, a e in. d .0.r: fir t ad u n t e sup l qfe i i sr Said nora ru a ll. '1 atem ere ,in; said space ,below, the desired leveL from a maximum to a minimum, then if thetempe gisinot restored, for adjusting said face dam W rom-a maximum open to a minimum. open-p sistionandi for adjusting sai d ct damper ta mi im m; openv t m m -mp gn-P9$ Q9. ,and; then if,the,temperature is not-restored fw initiating the supply of, heating fluid to, said heater-andadjusting same from a minimumjto ,a; maximum ,until the temperature is. restored. ;-6, An air tconditioning system comprising (an air :cooling refrigerant evaporator, an air. he tier mngtheidow s am side of ai e a ora es, ,ldam-persdo-r bypassing; air from said evaporator tarollnd. ,said heater, a duct conducting, air, froth "the; conditioned ,spaceas bypass air to thedovvn- -stream side of said heater, a ductdamper in said duct, said, system includingmeans for, moving air-through said evaporator and heater, and ,for supplying it into the space to beconditio andfor moving air from saidspace througnsa d duct, 1 and means including a thermostat 1j.espon- =sive to temperaturephangesin said pace ,first adjustingthe supply, of refri eilahttos' d ievaporatorupon a fall in the temperature n said space below the desired level, fr orn a maxfrom a maximum open to a minimum, open p9- sition and for adjusting said duct damper from a minimum open to a maximum open position, and then if the temperature is not restored, for initiating the supply of heating fluid to said heater and adjusting same from a minimum to a maximum until the temperature is restored, the adjustments of said supply refrigerant, of said dampers and of said supply of heating fluid being overlapped whereby the adjustments of the dampers are started before the supply of refrigerant has been reduced to a minimum, and the supply of the heating fluid is initiated before the face dampers have reached their minimum open position and the duct damper has reached its maximum open position.
7. An air conditioning system comprising a humidifier, an air cooler, an air heater at the downstream side of said cooler, face dampers for bypassing air from said cooler around said heater, a duct for conducting air from the conditioned space as bypass air to the downstream side of said heater, a damper in said duct, said system including means for moving air through said humidifier, cooler and heater and supplying it into said space and for moving air from said space through said duct, means including means responsive to changes in the relative humidity in said space for first decreasing the effectiveness of said cooler, upon a fall in the relative humidity in said space, from a maximum to a minimum, and then if the relative humidity is not restored, initiating the action of said humidifier and then increasing its eifectiveness from a minimum to a maximum, and means including a thermostat responsive to temperature changes in said space for first adjusting the supply of cooling medium to said cooler upon a fall in the temperature in said space below the desired level, from a maximum to a minimum, and then if the temperature is not restored for adjusting said damper from minimum open position to maximum open position and for adjusting said face dampers from maximum open position to minimum open position, and
then if the temperature is not restored foractu- ='ating said heater and for increasing its effective- "'-ness from a minimum to a maximum.
8. An air conditioning system comprising a humidifier, an air cooling refrigerant evaporator, I
an air heater at the downstream side of said means for moving air through said humidifier, evaporator and heater and supplying it into said space and for moving air from said space through said duct, means including means re- "sponsive to changes in the relative humidity in said space for first adjusting the supply of refrigerant to said evaporator, upon a fall in the relative humidity in said space, from a maximum to a minimum, and then if the relative humidity is not restored, initiating the action of said humidifier and then increasing its effectiveness from a minimum to a maximum, means including a thermostat responsive to temperature changes in said space for first adjusting the supply of refrigerant to said evaporator upon a fall in the temperature in said space below the desired level, from a maximum to a -minimum, and then if the temperature isnot restored for adjusting said damper from a minimum open position to maximum open position and for adjusting said face dampers from maximum open position to minimum open position,
and then if the temperature is not restored for actuating said heater and forincreasing its effectiveness from a minimum to a maximum,
and means controlled by said thermostat for preventing said humidity responsive means from decreasing the supply of refrigerant to said evaporator when the temperature in said space is above the desired level. I I
9; An air, conditioning system comprising a humidifier, an air cooler, air reheating means, said system including means for moving air through said humidifier, said cooler and said reheating means and for supplying it into the conditioned space, means including means responsive to changes in the relative humidity in said space for first adjusting the efiectiveness of said cooler towards minimum upon a decrease in the relative humidity in said space below the desired level and then if the humidity is not restored, for actuating said humidifier, means including a thermostat responsive to temperature changes in said space for first adjusting the effectiveness of said cooler towards minimum, upon a fall in the temperature in said space below the desired level, and then if the temperature is not restored, for initiating the action of said reheating means, and means controlled by said thermostat for preventing said humidity responsive means from decreasing the effectiveness of said cooler when the temperature in said space is above the desired level.
JAMES C. MARLOW.
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Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2953355A (en) * 1957-05-01 1960-09-20 Carrier Corp Air conditioning systems for industrial applications
US3002730A (en) * 1956-10-03 1961-10-03 Swift & Co Air conditioning system
US3091288A (en) * 1960-02-16 1963-05-28 Hipress Air Conditioning Of Am High pressure air conditioning system
US3247894A (en) * 1964-06-03 1966-04-26 Vaughn Bldg Co Of Ohio Air conditioning system
US3526967A (en) * 1969-01-21 1970-09-08 Robert E Bolz Pelt drying system
US4103508A (en) * 1977-02-04 1978-08-01 Apple Hugh C Method and apparatus for conditioning air
US4175934A (en) * 1975-02-07 1979-11-27 Hoechst Aktiengesellschaft Clear air device
US4210278A (en) * 1979-02-06 1980-07-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus for supplying conditioned air at a substantially constant temperature and humidity
US4281522A (en) * 1979-10-30 1981-08-04 Carrier Corporation Makeup air preconditioner for use with an air conditioning unit
US4347708A (en) * 1979-10-30 1982-09-07 Carrier Corporation Makeup air preconditioner for use with an air conditioning unit
US4367787A (en) * 1980-05-16 1983-01-11 Haden Schweitzer Corporation Air conditioning apparatus and method for paint spray booths
US4494596A (en) * 1980-05-16 1985-01-22 Haden Schweitzer Corporation Method and apparatus for conditioning air temperature and humidity
US4711294A (en) * 1985-08-14 1987-12-08 Jacobs Alphonse F Temperature and humidity control system
US5346127A (en) * 1993-10-14 1994-09-13 Creighton And Associates, Inc. Air conditioning system with enhanced dehumidification feature
US6386281B1 (en) * 2000-09-18 2002-05-14 American Standard International Inc. Air handler with return air bypass for improved dehumidification
US20020088614A1 (en) * 2000-07-28 2002-07-11 Hydrogenics Corporation Apparatus for humidification and temperature control of incoming fuel cell process gas
US6508066B1 (en) * 2000-08-25 2003-01-21 Raymond A. Mierins Single coil dual path dehumidification system
WO2004055445A1 (en) * 2002-12-17 2004-07-01 Ludwig Michelbach Air duct module
US7052791B2 (en) 2000-07-28 2006-05-30 Hydrogenics Corporation Apparatus for humidification and temperature control of incoming fuel cell process gas
US20060273183A1 (en) * 2005-06-03 2006-12-07 Lennox Manufacturing Inc. Method of dehumidifying an indoor space using outdoor air
EP2418431A3 (en) * 2010-07-02 2012-12-19 Ludwig Michelbach Air conditioning system with air conditioning device
US20140083661A1 (en) * 2012-05-12 2014-03-27 Lex Industries Ltd. Computer room air conditioning unit
JP2015114063A (en) * 2013-12-12 2015-06-22 株式会社藤製作所 Heating and humidifying device and device incorporating the same
EP2912385A4 (en) * 2012-09-20 2016-06-22 Cons Energy Solutions Inc An air conditioning system for dehumidifying and cooling air
US9840125B2 (en) 2013-08-30 2017-12-12 B/E Aerospace, Inc. Aircraft galley with air-through carts
US9919575B2 (en) 2013-08-30 2018-03-20 B/E Aerospace, Inc. Device for reversing chiller airflow in an aircraft galley
US9987902B2 (en) 2013-08-29 2018-06-05 B/E Aerospace, Inc. Universal modular ducting for chilled aircraft galleys
US10016055B2 (en) 2014-07-08 2018-07-10 B/E Aerospace, Inc. Compact liquid cooled, air through galley chiller
US10040556B2 (en) 2013-10-07 2018-08-07 B/E Aerospace, Inc. Chilled air plenum system for aircraft galleys
US10545476B2 (en) 2015-01-26 2020-01-28 Consolidated Energy Solutions Inc. Method of self-balancing plurality of mechanical components within a temperature control unit of an HVAC system

Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3002730A (en) * 1956-10-03 1961-10-03 Swift & Co Air conditioning system
US2953355A (en) * 1957-05-01 1960-09-20 Carrier Corp Air conditioning systems for industrial applications
US3091288A (en) * 1960-02-16 1963-05-28 Hipress Air Conditioning Of Am High pressure air conditioning system
US3247894A (en) * 1964-06-03 1966-04-26 Vaughn Bldg Co Of Ohio Air conditioning system
US3526967A (en) * 1969-01-21 1970-09-08 Robert E Bolz Pelt drying system
US4175934A (en) * 1975-02-07 1979-11-27 Hoechst Aktiengesellschaft Clear air device
US4103508A (en) * 1977-02-04 1978-08-01 Apple Hugh C Method and apparatus for conditioning air
US4210278A (en) * 1979-02-06 1980-07-01 The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration Apparatus for supplying conditioned air at a substantially constant temperature and humidity
US4281522A (en) * 1979-10-30 1981-08-04 Carrier Corporation Makeup air preconditioner for use with an air conditioning unit
US4347708A (en) * 1979-10-30 1982-09-07 Carrier Corporation Makeup air preconditioner for use with an air conditioning unit
US4367787A (en) * 1980-05-16 1983-01-11 Haden Schweitzer Corporation Air conditioning apparatus and method for paint spray booths
US4494596A (en) * 1980-05-16 1985-01-22 Haden Schweitzer Corporation Method and apparatus for conditioning air temperature and humidity
US4711294A (en) * 1985-08-14 1987-12-08 Jacobs Alphonse F Temperature and humidity control system
US5346127A (en) * 1993-10-14 1994-09-13 Creighton And Associates, Inc. Air conditioning system with enhanced dehumidification feature
US7051801B1 (en) * 2000-07-28 2006-05-30 Hydrogenics Corporation Method and apparatus for humidification and temperature control of incoming fuel cell process gas
US20020088614A1 (en) * 2000-07-28 2002-07-11 Hydrogenics Corporation Apparatus for humidification and temperature control of incoming fuel cell process gas
US6787254B2 (en) 2000-07-28 2004-09-07 Hydrogenics Corporation Method and apparatus for humidification and temperature control of incoming fuel cell process gas
US7052791B2 (en) 2000-07-28 2006-05-30 Hydrogenics Corporation Apparatus for humidification and temperature control of incoming fuel cell process gas
US7261150B2 (en) 2000-07-28 2007-08-28 Hydrogenics Corporation Apparatus for humidification and temperature control of incoming fuel cell process gas
US6508066B1 (en) * 2000-08-25 2003-01-21 Raymond A. Mierins Single coil dual path dehumidification system
US6604688B2 (en) * 2000-09-18 2003-08-12 American Standard International Inc. Air handler with return air bypass for improved dehumidification
US6386281B1 (en) * 2000-09-18 2002-05-14 American Standard International Inc. Air handler with return air bypass for improved dehumidification
WO2004055445A1 (en) * 2002-12-17 2004-07-01 Ludwig Michelbach Air duct module
US20060273183A1 (en) * 2005-06-03 2006-12-07 Lennox Manufacturing Inc. Method of dehumidifying an indoor space using outdoor air
EP2418431A3 (en) * 2010-07-02 2012-12-19 Ludwig Michelbach Air conditioning system with air conditioning device
EP2418430A3 (en) * 2010-07-02 2012-12-19 Ludwig Michelbach Air conditioning device and method for conditioning an airflow
US20150065029A1 (en) * 2012-05-12 2015-03-05 Lex Industries Ltd. Computer room air conditioning unit
US9521783B2 (en) * 2012-05-12 2016-12-13 Lex Industries Ltd. Computer room air conditioning unit
US9635786B2 (en) 2012-05-12 2017-04-25 Lex Industries Ltd. Computer room air conditioning unit
US20140083661A1 (en) * 2012-05-12 2014-03-27 Lex Industries Ltd. Computer room air conditioning unit
US11112134B2 (en) 2012-09-20 2021-09-07 Flo Energy Solutions Inc. Air conditioning system for dehumidifying and cooling air
EP2912385A4 (en) * 2012-09-20 2016-06-22 Cons Energy Solutions Inc An air conditioning system for dehumidifying and cooling air
US9709294B2 (en) 2012-09-20 2017-07-18 Consolidated Energy Solutions Inc. Air conditioning system for dehumidifying and cooling air
US9987902B2 (en) 2013-08-29 2018-06-05 B/E Aerospace, Inc. Universal modular ducting for chilled aircraft galleys
US9840125B2 (en) 2013-08-30 2017-12-12 B/E Aerospace, Inc. Aircraft galley with air-through carts
US9919575B2 (en) 2013-08-30 2018-03-20 B/E Aerospace, Inc. Device for reversing chiller airflow in an aircraft galley
US10040556B2 (en) 2013-10-07 2018-08-07 B/E Aerospace, Inc. Chilled air plenum system for aircraft galleys
JP2015114063A (en) * 2013-12-12 2015-06-22 株式会社藤製作所 Heating and humidifying device and device incorporating the same
US10016055B2 (en) 2014-07-08 2018-07-10 B/E Aerospace, Inc. Compact liquid cooled, air through galley chiller
US10545476B2 (en) 2015-01-26 2020-01-28 Consolidated Energy Solutions Inc. Method of self-balancing plurality of mechanical components within a temperature control unit of an HVAC system

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