Makina ambiri oziziritsira mpweya ndi mafiriji amapeza mayunitsi awo owongolera panja pazifukwa zazikulu ziwiri. Choyamba, izi zimatengera mwayi wa kutentha kwa kunja kwa kunja kuchotsa kutentha kwina kotengedwa ndi evaporator, ndipo chachiwiri, kuchepetsa kuwononga phokoso.
Mayunitsi a condensing nthawi zambiri amakhala ndi ma compressor, ma condenser mafani, mafani akunja a condenser, zolumikizira, zoyambira zolumikizirana, ma capacitor, ndi mbale zolimba zokhala ndi mabwalo. Wolandirayo nthawi zambiri amaphatikizidwa mu unit condensing ya refrigeration system. Mkati mwa unit condensing, kompresa nthawi zambiri imakhala ndi chotenthetsera chomwe chimalumikizidwa pansi pake kapena pa crankcase. Chotenthetsera chamtunduwu nthawi zambiri chimatchedwa achotenthetsera crankcase.
Thecompressor crankcase heaterndi chotenthetsera chokana chomwe nthawi zambiri chimangiriridwa pansi pa crankcase kapena kulowetsedwa mu chitsime mkati mwa crankcase ya kompresa.Crankcase heatersNthawi zambiri amapezeka pa kompresa pamene kutentha yozungulira ndi wotsika kuposa dongosolo ntchito evaporator kutentha.
Mafuta a crankcase kapena mafuta a compressor ali ndi ntchito zambiri zofunika. Ngakhale kuti firiji ndi madzi ogwira ntchito omwe amafunikira kuti aziziziritsa, mafuta amafunikira kuti azipaka makina osuntha a kompresa. Nthawi zonse, nthawi zonse pamakhala mafuta ochepa omwe amatuluka mu crankcase ya compressor ndikuzungulira ndi firiji mu dongosolo lonse. Pakapita nthawi, kuthamanga koyenera kwa refrigerant kudzera mu chubu la dongosolo kudzalola kuti mafuta othawawa abwerere ku crankcase, ndipo ndichifukwa chake mafuta ndi refrigerant ziyenera kusungunulana. Panthawi imodzimodziyo, kusungunuka kwa mafuta ndi refrigerant kungayambitse vuto lina la dongosolo. Vuto ndi kusamuka kwa refrigerant.
Kusamuka ndi vuto la aperiodic. Iyi ndi njira yomwe mafiriji amadzimadzi kapena / kapena nthunzi amasuntha kapena kubwerera ku crankcase ya kompresa ndi mizere yoyamwa panthawi yotseka kwa kompresa. Kuzimitsa kwa kompresa, makamaka pakuzimitsidwa kwanthawi yayitali, firiji iyenera kusunthidwa kapena kusamutsidwa kupita komwe kupanikizika kumakhala kotsika kwambiri. Mwachilengedwe, madzi amadzimadzi amayenda kuchokera kumalo omwe ali ndi mphamvu zambiri kupita kumalo otsika kwambiri. Crankcase nthawi zambiri imakhala ndi mphamvu yotsika kuposa evaporator chifukwa imakhala ndi mafuta. Kutentha kozizira kumakulitsa kutsika kwa mpweya wa nthunzi ndikuthandizira kuti mpweya wa refrigerant ukhale wamadzimadzi mu crankcase.
Mafuta a firiji omwe amakhala ndi mpweya wochepa, ndipo ngati firiji ili mu nthunzi kapena madzi, idzapita ku mafuta a firiji. M'malo mwake, mphamvu ya nthunzi yamafuta owundayi ndi yotsika kwambiri kotero kuti ngakhale vacuum ya ma microns 100 itakokedwa pafiriji, sizingasunthike. Mpweya wamafuta ena oundana umachepetsedwa kukhala ma microns 5-10. Ngati mafutawo alibe mphamvu yotsika ya nthunzi yotere, amaphweteka nthawi iliyonse pakakhala kupanikizika kochepa kapena vacuum mu crankcase.
Popeza kusuntha kwa refrigerant kumatha kuchitika ndi mpweya wa refrigerant, kusamuka kumatha kukwera kapena kutsika. Pamene nthunzi ya refrigerant ifika pa crankcase, imalowetsedwa ndi kusungunuka mu mafuta chifukwa cha kusokonezeka kwa refrigerant / mafuta.
Nthawi yayitali yotsekedwa, refrigerant yamadzimadzi imapanga striated wosanjikiza pansi pa mafuta mu crankcase. Izi zili choncho chifukwa mafiriji amadzimadzi ndi olemera kuposa mafuta. Panthawi yochepa yotseka kompresa, firiji yosamukira ilibe mwayi wokhazikika pansi pa mafuta, koma imasakanikirana ndi mafuta mu crankcase. M'nyengo yotentha ndi/kapena miyezi yozizira pamene zoziziritsa sizikufunika, eni nyumba nthawi zambiri amazimitsa cholumikizira chamagetsi chapanja chowongolera mpweya. Izi zipangitsa kuti kompresa isakhale ndi kutentha kwa crankcase chifukwa chotenthetsera cha crankcase chatha. Kusamuka kwa firiji kupita ku crankcase kudzachitika nthawi yayitali iyi.
Nyengo yozizira ikayamba, ngati mwininyumba satembenuza wowononga dera osachepera maola 24-48 asanayambe gawo loziziritsira mpweya, kutulutsa thovu kwakukulu kwa crankcase ndi kupanikizika kudzachitika chifukwa chakusamuka kwa refrigerant kwanthawi yayitali.
Izi zitha kupangitsa crankcase kutaya mafuta oyenera, komanso kuwononga ma bere ndikupangitsa kulephera kwamakina mkati mwa kompresa.
Zowotchera crankcase zidapangidwa kuti zithandizire kuthana ndi kusamuka kwa furiji. Ntchito ya chotenthetsera cha crankcase ndikusunga mafuta mu makina a kompresa pa kutentha kwambiri kuposa gawo lozizira kwambiri la dongosolo. Izi zipangitsa kuti crankcase ikhale ndi kuthamanga kwambiri kuposa dongosolo lonselo. Refrigerant yomwe imalowa mu crankcase imatenthedwa ndikubwezeredwa mumzere woyamwa.
Nthawi zosazungulira, kusamuka kwa firiji kupita ku compressor crankcase ndi vuto lalikulu. Izi zitha kuwononga kwambiri kompresa
Nthawi yotumiza: Sep-25-2024