,
恒溫恒濕精密空調(diào)要求能常年不停機(jī)地運(yùn)行
,因而其可靠性非常高。恒溫
恒濕機(jī)的送風(fēng)系統(tǒng)有多種選擇
。常見的有下送上回
、上送下回、上送側(cè)回等
。標(biāo)準(zhǔn)型的恒溫恒濕機(jī)采用中效過濾裝置來清潔室內(nèi)空氣。根據(jù)客戶需要
,可以選擇亞高效的空氣過濾器
。
Inadditiontoadjustingtheairtemperature,theconstanttemperatureandhumiditymachinealsohasthefunctionsofhumidityadjustmentanddustremoval.Comparedwithordinaryair-conditioners,theconstanttemperatureandhumidityprecisionairconditioningsystemcanrunalltheyearroundwithoutstopping,soitsreliabilityisveryhigh.Therearemanyoptionsfortheairsupplysystemofconstanttemperatureandconstanthumiditymachine.Thecommononesincludethedowndelivery,theupperandthelower,andtheupperside.Thestandardtypeconstanttemperatureandhumiditymachineadoptsmediumefficiencyfiltertocleanindoorair.Accordingtocustomerneeds,subefficientairfilterscanbeselected.
恒溫恒濕機(jī)組特點(diǎn):
Characteristicsofconstanttemperatureandconstanthumidityunit:
1.制冷量一般在10HP-200HP之間
;
1.thecoolingcapacityisgenerallybetween10HP-200HP;
2.配置了電加熱和電極式加濕
,加熱量一般富裕量較大,空調(diào)機(jī)配置加濕量均偏小
,需要重新計(jì)算,一般需要加大一個(gè)型號或多配置一臺
;
2.configurationofelectricheatingandelectrodehumidification,theheatingamountisgenerallyrich,airconditionerconfigurationhumidificationissmall,needtoberecalculated,thegeneralneedtoincreaseamodelormulti-configurationone;
3.有額定的風(fēng)量要求
;
3.theratedairvolumerequirements;
4.有額定的冷卻水量要求;
4.theratedcoolingwaterrequirements;
5.冷凝器的阻力一般在0.82-3.45mH2O
;
5.theresistanceofthecondenserisgenerallyat0.82-3.45mH2O;
6.空調(diào)機(jī)組尺寸較小
;
6.thesizeoftheairconditioningunitissmall;
7.溫控范圍:18~25
,靈敏度:±1;濕控范圍:50~70
,靈敏度:±5;
7.temperaturecontrolrange:18~25,sensitivity:+1;humiditycontrolrange:50~70,sensitivity:+5;
8.機(jī)外靜壓一般在100~550之間
;
8.machineisgenerallybetween100~550.
9.設(shè)計(jì)條件:進(jìn)風(fēng)干球溫度23℃
,濕球溫度17℃;冷卻水進(jìn)水溫度30℃
,出水溫度35℃;
9.designconditions:intakeairdrybulbtemperature23C,wetbulbtemperature17centigrade,coolingwaterinlettemperature30C,effluenttemperature35C;
一般適用在有溫濕度控制或整個(gè)設(shè)計(jì)面積不大的情況下
。如果該工程面積較大
,系統(tǒng)劃分較多,空調(diào)機(jī)房位置相對分散
,管理和系統(tǒng)的控制就會帶不便
,也不利于能量統(tǒng)一分配,能源浪費(fèi)較嚴(yán)重
。在這種情況下
,一般面積在大于2000m2,建議采用冷水機(jī)組+組合式空氣處理機(jī)組的設(shè)計(jì)形式
。
Generally,itissuitablefortemperatureandhumiditycontrolorthewholedesignareaisnotlarge.Iftheareaislarge,thesystemisdividedmore,thepositionoftheairconditioningmachineroomisrelativelyscattered,themanagementandsystemcontrolwillbeinconvenient,anditisnotconducivetotheunifieddistributionofenergy,andthewasteofenergyismoreserious.Inthiscase,thegeneralareaisgreaterthan2000m2,andthedesignofchiller+combinedairhandlingunitisrecommended.
恒溫恒濕機(jī)組的用途分為兩塊:
Theuseofconstanttemperatureandconstanthumidityunitisdividedintotwopieces.
1、恒溫恒濕車間
,但無凈化要求
;
1,constanttemperatureandconstanthumidityworkshop,butnopurificationrequirements;
2
、既有恒溫恒濕要求
,又需要凈化等級控制;
2,bothconstanttemperatureandhumidityrequirements,andtheneedforpurificationlevelcontrol;
房間的情況:
Thesituationoftheroom:
1.)房間內(nèi)顯熱較大
;
1.)theheatintheroomislarger.
2.)房間內(nèi)顯熱較?div id="jfovm50" class="index-wrap">?div id="d48novz" class="flower left">
;針對以上兩點(diǎn)進(jìn)行分析:
2.)thesensibleheatintheroomissmall;
a.從負(fù)荷方面考慮:
A.considerationoftheload:
系統(tǒng)的送風(fēng)量是與房間內(nèi)的顯熱和送風(fēng)溫差決定的,而不是根據(jù)系統(tǒng)總制冷量(房間的顯熱和潛熱)計(jì)算得出的。恒溫恒濕機(jī)組制冷量一般顯熱占50%
,潛熱占50%
,相當(dāng)于新風(fēng)占整個(gè)送風(fēng)量的20%左右
。當(dāng)房間內(nèi)顯熱較大
,而新風(fēng)量不大時(shí),計(jì)算的送風(fēng)量較大
,就不能根據(jù)總制冷量選擇恒溫恒濕機(jī)組標(biāo)定的制冷量來確定
。
Theairvolumeofthesystemisdeterminedbythesensibleheatandairtemperaturedifferenceintheroom,notbythetotalrefrigeratingcapacityofthesystem(thesensibleheatandlatentheatoftheroom).Thecoolingcapacityofconstanttemperatureandhumidityunitis50%,andlatentheatis50%,whichisequivalentto20%ofthefreshairvolume.Whentheheatislargerintheroom,andwhenthenewairvolumeissmall,theamountofairsupplyislarger,anditcannotbedeterminedaccordingtotherefrigeratingcapacityoftheconstanttemperatureandconstanthumidityunit.
b.從機(jī)外余壓考慮:
B.fromexternalpressureconsideration:
恒溫恒濕
,但無凈化要求系統(tǒng)對空調(diào)機(jī)組的機(jī)外余壓要求不高
,主要克服送回風(fēng)管道、閥門
、散流器
、初效過濾器等
,常規(guī)的機(jī)組即可滿足要求
;
Constanttemperatureandhumidity,butnopurificationrequirementsofthesystemforairconditioningunitsoutsidepressurerequirementsarenothigh,mainlytoovercometheairsupplyandreturnpipes,valves,diffuser,initialfilter,andotherconventionalunitscanmeettherequirements;
既有恒溫恒濕要求,又需要凈化等級控制的系統(tǒng)對空調(diào)機(jī)組的機(jī)外余壓要求較高
,一般系統(tǒng)總阻力在
1100Pa~1400Pa之間
,主要克服送回風(fēng)管道、閥門
、散流器
、初效過濾器(初阻力50Pa,終阻力100Pa)
、中效過濾器(初阻力150Pa,終阻力300Pa)
、高效過濾器(初阻力250Pa
,終阻力500Pa)等,常規(guī)的機(jī)組就無法滿足要求
。如系統(tǒng)需要設(shè)置二次回風(fēng)
,潔凈式恒溫恒濕機(jī)組就無法選用
;一次回風(fēng)的情況
,恒溫恒濕機(jī)組+加壓箱的設(shè)計(jì)形式,由于在選擇加壓風(fēng)機(jī)的型號時(shí)無法與恒溫恒濕機(jī)組內(nèi)的風(fēng)機(jī)很難匹配
,不同型號
、不同功率的風(fēng)機(jī)在串聯(lián)或并聯(lián)時(shí)總風(fēng)量不是簡單的相加
,計(jì)算相對較復(fù)雜
;建議在一般設(shè)計(jì)過程中盡量設(shè)計(jì)為單風(fēng)機(jī)系統(tǒng)。
Thesystemnotonlyhastherequirementofconstanttemperatureandhumidity,butalsoneedsthesystemofpurifyinggradecontroltohavehighexternalpressurerequirementforairconditioningunit.Thegeneralsystemresistanceisbetween1100Paand1400Pa,whichmainlyovercomestheairsupplyandreturnpipe,valve,diffuser,initialeffectfilter(initialresistance50Pa,finalresistance100Pa),middleeffectfilter(initialresistance150Pa,final).Resistance300Pa),highefficiencyfilter(initialresistance250Pa,finalresistance500Pa)andsoon,conventionalunitscannotmeettherequirements.Ifthesystemneedstosettworeturnair,thecleantypeconstanttemperatureandconstanthumidityunitcannotbeselected;thefirstreturnaircondition,thedesignformoftheconstanttemperatureandconstanthumidityunit+pressurizationbox,becauseitisdifficulttomatchthefanintheconstanttemperatureandhumidityunitwhenchoosingthetypeofthepressurefan,thedifferenttypeanddifferentpowerfanareinseriesorparallel.Whenthetotalairvolumeisnotsimplyadded,thecalculationisrelativelycomplex.Itissuggestedthatthesinglefansystemshouldbedesignedasfaraspossibleinthegeneraldesignprocess.
系統(tǒng)的運(yùn)作原理
Theoperatingprincipleofthesystem

恒濕恒濕機(jī)系統(tǒng)的運(yùn)作是通過三個(gè)相互聯(lián)系的系統(tǒng):制冷劑循環(huán)系統(tǒng)
、空氣循環(huán)系統(tǒng)、
電器自控系統(tǒng);
Theoperationoftheconstanthumidityandhumiditymachinesystemisbasedonthreeinterrelatedsystems:refrigerantcirculationsystem,aircirculationsystem,andelectricalapplianceautomaticcontrolsystem.
1
,制冷劑循環(huán)系統(tǒng)
1,refrigerantcirculationsystem
蒸發(fā)器中的液態(tài)制冷劑吸收空氣的熱量(空氣被降溫及除濕)并開始蒸發(fā)
,比較終制冷劑與空之間形成一定的溫度差,液態(tài)制冷劑亦完全蒸發(fā)變?yōu)闅鈶B(tài)
,后被壓縮機(jī)吸入并壓縮(壓力和溫度增加),氣態(tài)制冷劑通過冷凝器(風(fēng)冷/水冷)吸收熱量,凝結(jié)成液體
。通過膨脹閥(或毛細(xì)管)節(jié)流后變成低溫低壓制冷劑進(jìn)入蒸發(fā)器
,完成制冷劑循環(huán)過程。
Theliquidrefrigerantintheevaporatorabsorbstheheatoftheair(theairiscooledanddehumidified)andbeginstoevaporate,eventuallyformingacertaintemperaturedifferencebetweentherefrigerantandtheair,andtheliquidrefrigerantiscompletelyvaporizedintothegaseousstate,thenthecompressorisinhaledandcompressed(pressureandtemperatureincreases),andthegaseousrefrigerantpassesthecondenser(aircooling/water).Cold)absorbsheatandcondensesintoaliquid.Throughtheexpansionvalve(orcapillary)throttling,thecryogeniclowpressurerefrigerantenterstheevaporatortocompletetherefrigerantcirculationprocess.
2
,空氣環(huán)系統(tǒng)
2,airloopsystem
風(fēng)機(jī)負(fù)責(zé)將空氣從回風(fēng)口吸入,空氣經(jīng)過蒸發(fā)器(降溫、除濕)
,
加濕器,電加熱器(升溫)后經(jīng)送風(fēng)口送到用戶需的空間內(nèi),送出的空氣與空間內(nèi)的空氣混合后回到回風(fēng)口
。
Thefanisresponsibleforinhalingtheairfromtheairinlet.Theairpassesthroughtheevaporator(cooling,dehumidification),humidifierandelectricheater(ShengWen).Theairissenttotheuser'sspaceaftertheairinlet.Theairsentoutandtheairinthespacewillbemixedbacktotheairvent.
3,電器自控系統(tǒng)
3,electricalautomaticcontrolsystem
包括電源部分和自動(dòng)控制部分