Umgaqo wokufrijiwa kwefriji usekelwe kumjikelo weCarnot ongasemva, apho i-refrigerant iyindawo ephambili, kwaye ubushushu obukwifriji buthuthwa busiwe ngaphandle ngenkqubo yokutshintsha isigaba se-vaporization endothermic - condensation exothermic.
Iiparameter eziphambili:
①Indawo yokubila:Imisela ubushushu bokufuma (ukuba iqondo lokubila liphantsi, iqondo lokukhenkceza liphantsi).
②Uxinzelelo lokujiya:Okukhona uxinzelelo luphezulu, kokukhona umthwalo wecompressor uba mkhulu (okuchaphazela ukusetyenziswa kwamandla kunye nengxolo).
③Ukuqhuba kobushushu:Okukhona ubushushu buhamba phezulu, kokukhona isantya sokupholisa sikhawuleza.
Kufuneka uzazi iintlobo ezine eziphambili zokusebenza kakuhle kokupholisa efrijini:
1.R600a (i-isobutane, i-hydrocarbon refrigerant)
(1)Ukhuseleko lokusingqongileyo: GWP (Ubushushu beHlabathi) ≈ 0, ODP (Ubunzima bokuTshabalalisa iOzone) = 0, ngokuhambelana nemigaqo ye-European Union F – Gas.
(2)Ukusebenza kakuhle kwefriji: iqondo lokubila – 11.7 °C, ifanelekile kwiimfuno zefriji yasekhaya (-18 °C), umthamo weyunithi yokufriji ungaphezulu nge-30% kune-R134a, ukufuduswa kwecompressor kuncinci, kwaye ukusetyenziswa kwamandla kuphantsi.
(3)Inkcazo yetyala: Ifriji ye-190L isebenzisa i-R600a, kunye nokusetyenziswa kwamandla kwemihla ngemihla kwe-0.39 degrees (inqanaba loku-1 lokonga amandla).
2.R134a (tetrafluoroethane)
(1)Ukhuseleko lokusingqongileyo: GWP = 1300, ODP = 0, iManyano yaseYurophu iza kuyithintela ukusetyenziswa kwezixhobo ezintsha ukususela ngo-2020.
(2)Ukusebenza kakuhle kwefriji: iqondo lokubila – 26.5 °C, ukusebenza kobushushu obuphantsi kungcono kune-R600a, kodwa amandla okupholisa eyunithi aphantsi, nto leyo efuna i-compressor enkulu yokufuduka.
(3) Uxinzelelo lwe-condenser luphezulu ngama-50% kunolo lwe-R600a, kwaye ukusetyenziswa kwamandla e-compressor kuyanda.
3.R32 (i-difluoromethane)
(1)Ukhuseleko lokusingqongileyo: GWP = 675, eyi-1/2 ye-R134a, kodwa iyatsha (ukuthintela umngcipheko wokuvuza).
(2)Ukusebenza kakuhle kwefriji: iqondo lokubila – 51.7 °C, lifanelekile kwii-air conditioners ezitshintshayo, kodwa uxinzelelo lokufuma olukwifriji luphezulu kakhulu (luphindwe kabini kune-R600a), nto leyo enokubangela ukuba i-compressor igqithise kakhulu.
4.R290 (ipropane, i-hydrocarbon refrigerant)
(1)Ubuhlobo nokusingqongileyo: I-GWP ≈ 0, i-ODP = 0, lukhetho lokuqala lwe "refrigerant yexesha elizayo" kwiManyano yaseYurophu.
(2)Ukusebenza kakuhle kwefriji: iqondo lokubila – 42 °C, umthamo wokupholisa weyunithi ungaphezulu kwama-40% kune-R600a, ifanelekile kwiifriji ezinkulu zorhwebo.
Ingqwalasela:Iifriji zasekhaya kufuneka zivalwe ngokuqinileyo ngenxa yokuba ziyatsha (inqanaba lokutshisa liyi-470 °C) (ixabiso liyanda nge-15%).
I-refrigerant iyichaphazela njani ingxolo yefriji?
Ingxolo yefriji ibangelwa kukungcangcazela kwecompressor kunye nengxolo yokuhamba kwefriji. Iimpawu zefriji zichaphazela ingxolo ngeendlela ezilandelayo:
(1) Ukusebenza koxinzelelo oluphezulu (uxinzelelo olujiyileyo yi-2.5MPa), icompressor idinga ukusebenza rhoqo, ingxolo ingafikelela kwi-42dB (ifriji eqhelekileyo malunga ne-38dB), ukusebenza koxinzelelo oluphantsi (uxinzelelo olujiyileyo yi-0.8MPa), umthwalo wecompressor uphantsi, ingxolo iphantsi njenge-36dB.
(2) I-R134a ine-viscosity ephezulu (0.25mPa · s), kwaye ithambekele kwingxolo yokuthontsiza (efana nesandi "sokutshixiza") xa ihamba ngetyhubhu ye-capillary. I-R600a ine-viscosity ephantsi (0.11mPa · s), ukuhamba kakuhle, kunye nengxolo encitshisiweyo malunga ne-2dB.
Qaphela: Ifriji ye-R290 kufuneka yongeze uyilo olungenakuqhuma (njengomaleko wefoam otyebileyo), kodwa inokubangela ukuba ibhokisi ivakale kwaye ingxolo inyuke nge-1 - 2dB.
Ungayikhetha njani uhlobo lwefriji yefriji?
I-R600a inomsindo ophantsi wokusetyenziswa ekhaya, ixabiso liyi-5% yexabiso lilonke lefriji, i-R290 inokhuseleko oluphezulu lokusingqongileyo, ihlangabezana nemigangatho ye-European Union, ixabiso libiza ngama-20% kune-R600a, i-R134a iyahambelana, ifanelekile kwiifriji ezindala, i-R32 ayivuthwanga, khetha ngononophelo!
I-Refrigerant "ligazi" lefriji, kwaye uhlobo lwayo luchaphazela ngokuthe ngqo ukusetyenziswa kwamandla, ingxolo, ukhuseleko kunye nobomi benkonzo. Kubathengi abaqhelekileyo, i-R600a yeyona ndlela ilungileyo yokusebenza ngoku, kwaye i-R290 ingaqwalaselwa ekufuneni ukhuseleko oluphezulu lokusingqongileyo. Xa uthenga, ungaqinisekisa uhlobo lwe-refrigerant ngelogo yegama elingasemva kwefriji (njenge "Refrigerant: R600a") ukuze ungalahlekiswa ziingcamango zokuthengisa ezifana "nokuguqulwa kwamaza" kunye "nokungabikho kweqabaka".
Ixesha lokuposa: Matshi 26-2025 Imbono: