tio
i
ghostafteracoolairco
ditio
i
grefrigeratio
hostthroughthefroze
pumpi
totheroomsa
dthe
throughthecoilsystema
di
doorairheatexcha
gea
dthe
flowbacktotheairco
ditio
i
ghostformacircleCooli
ga
dcooli
gwatersystemaremai
lyforairco
ditio
i
ghostu
dertheeffectofcooli
gpumpcooli
gwaterflowi
gthroughtheairco
ditio
i
ghosta
dtakeawaythequa
tityofheatofairco
ditio
i
ghostthroughthetowerfa
forcooli
gi
cooli
gtowerplaceagai
a
dthe
flowbacktotheairco
ditio
i
ghostformacircleChilledwaterfroze
waterasheatcarrierco
sta
tlybroughtthei
doorqua
tityofheattooutdoor
Thispaperstudiedthece
tralairco
ditio
i
gsystemisu
dertheco
trolofPLCusi
gthePT100temperaturetra
smittercollectio
a
di
doortemperaturebyEM235a
alogi
putoutputmodulecollectedtemperaturereadi
gsca
beco
vertedtoa
alogthePIDcalculatio
co
veyi
gtheco
vertedtofreque
cyco
verterfreque
cyco
vertertodrivethemotormakesthecorrespo
di
grotatio
alacceleratio
a
ddeceleratio
makei
doortemperaturecha
gesthusformi
gaclosedloopco
trolrealizetheoptimalco
trollowe
ergyefficie
cyguara
teethelivi
ga
dworki
ge
viro
me
toftemperaturea
dhumidityatthesametimethebiggestspacetosavee
ergyimprovee
ergyefficie
cy
fKeywordsCo
trolofce
tralairco
ditio
i
gtemperaturePLCEM235Freque
cycha
gerPIDco
trol
f目录
1引言111课题研究的意义112中央空调控制系统研究现状113设计的任务和要求2
2中央空调系统的构成及工作原理321中央空调系统的工作原理322中央空调系统的构成3221冷冻水循环系统3222冷却水循环系统3223空调主机4224风机盘管系统4
3中央空调系统控制原理531传统控制方式介绍r