Electrolux E23CS75DSS0 - Section D - Air Circulation; Air Circulation Patterns

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Section D - Air Circulation
Automatic Defrost Models
Principals Of Automatic Defrost
Operation
Automaticdefrostrefrigeratorsoperateonthe
principlethatmoistureorfrosttransfersormigrates
tothecoldestsurfaces(evaporator)inthefreezer
compartment.Forexample,asmallamountof
waterspilledinthefreezercompartmentwillfreeze
immediately.However,thisiceintimewillevaporate
andtransfertothecoldersurfacesofthefreezer
evaporatorcoil.
Air Circulation Patterns
Automaticdefrostmodelshaveasingle
evaporatorinthefreezercompartment,andhave
forcedaircoolinginthefreezerandrefrigerator
compartments.
The“nandtube”aluminumtypeevaporatoris
locatedbehindthelowerbackwallofthefreezer
compartment.Acirculatingfan(suctiontype)
pullsairfromthefreezercompartmentthrough
thegrillinthebottomofthefreezerandfromthe
refrigeratorcompartmentthroughaductlocated
intheseparatingwallinthebottomrearlefthand
cornerofthecabinetinterior.Theairisthandrawn
upthroughthenandtubesoftheevaporator
surface.Thecoldairisforcedintoafancoverand
dischargedintothetopofthefreezerandoutthe
airdischargeundertheicemaker.FigureD1.The
aircirculatingfanoperatesanytimethethermistors
sensethetemperatureofthefoodcompartment
orthefreezercompartmentareabovetheupper
controllimitandsendtheinformationtothelower
controlboard.Ifthefoodcompartmentiscallingfor
coolingtheautomaticdamperinthetopofthefood
compartmentwillopenandallowcoldairtoenter
thefoodcompartment.Ifthefoodcompartment
callsforcoolingbutthefanisnotrunning,thefan
willstartissoonasthedamperisopenandwill
continuetorunaslongasthefoodcompartment
and/orthefreezercompartmentcallforcooling.
Theaircirculatingfana12VDCfanmotor
operatesanytimethefoodcompartmentorthe
freezercompartmentcallforcooling.Duringthe
defrostperiod,thecompressorandcirculatingfan
donotoperate.Thepowerboardlocatedunderthe
freezerbehindthegrillopenstheelectricalcircuitto
thefanmotorandcompressorforthedefrostcycle.
Thelowercontrolboardalsoclosesthedamper
doorthatiscontrolledbya12VDCsteppermotor
Figure D1
andkeepsthedamperdoorclosedduringthe
completedefrostcycle.