(恒溫恒濕機(jī)與恒溫恒濕機(jī)組的區(qū)別在哪?)
恒溫恒濕機(jī)除了調(diào)節(jié)空氣溫度以外,還具有濕度調(diào)節(jié)、除塵等功能。與普通空調(diào)相比,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??;
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?。会槍σ陨蟽牲c(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,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控制部分。電源部分通過接觸器,對壓縮機(jī)、風(fēng)扇、電加器器,加濕器等供應(yīng)電源自動控制分部分又分為溫、濕度控制及故障保護(hù)部分:溫、濕度控制是通過溫、濕度控制器,將回風(fēng)的溫濕度與用戶設(shè)定的溫濕作對比,自動運(yùn)行壓縮機(jī)(降溫、除濕),加濕器,電加熱(升溫)等元件,實(shí)現(xiàn)恒溫恒濕的自動控制
Itincludesthepowersupplypartandtheautomaticcontrolpart.Throughthecontactor,thepowersupplyisdividedintothetemperature,humiditycontrolandthefaultprotectionpartsofthecompressor,thefan,theadderandthehumidifier.Thetemperatureandhumiditycontrolisthroughthetemperatureandhumiditycontrol,andthetemperatureandhumidityofthereturnairiscomparedwiththetemperatureandhumiditysetbytheuser,andthecompressorisautomaticallyrun.Temperature,dehumidification,humidifier,electricheating(ShengWen)andothercomponentstoachieveautomaticcontrolofconstanttemperatureandhumidity.