Umgaqo wefriji wefriji usekelwe kwi-reverse Carnot cycle, apho i-refrigerant ingundoqo, kwaye ukushisa kwifriji kuhanjiswa ngaphandle ngenkqubo yokutshintsha kwesigaba se-vaporization endothermic - i-condensation exothermic.
Iiparamitha eziphambili:
①Indawo yokubilisa:Imisela iqondo lobushushu bomphunga (ezantsi indawo ebilayo, isezantsi iqondo lobushushu befriji).
②Ukuthoba uxinzelelo:Ukuphakama koxinzelelo, umthwalo omkhulu we-compressor (echaphazela ukusetyenziswa kwamandla kunye nengxolo).
③I-Thermal conductivity:Ukuphakama kwe-conductivity ye-thermal, ngokukhawuleza isantya sokupholisa.
Kuya kufuneka uzazi ezi-4 iintlobo eziphambili zokupholisa kwefriji:
1.R600a (isobutane, isikhenkcezisi sehydrocarbon)
(1)Ukhuseleko lokusingqongileyo: I-GWP (i-Global Warming Potential) ≈ 0, i-ODP (Ithuba lokutshabalalisa i-Ozone) = 0, ngokuhambelana ne-European Union F - imimiselo yeGesi.
(2)Ukusebenza kwefriji: indawo yokubilisa - 11.7 °C, ilungele igumbi lesikhenkcisi sasekhaya (-18 °C) iimfuno, umthamo weyunithi yesikhenkcisi malunga ne-30% ephezulu kune-R134a, i-compressor displacement incinci, kwaye ukusetyenziswa kwamandla kuphantsi.
(3)Inkcazo yetyala: Ifriji ye-190L isebenzisa i-R600a, kunye nokusetyenziswa kwamandla kwansuku zonke kwe-0.39 degrees (inqanaba le-energy ye-energy 1).
2.R134a (tetrafluoroethane)
(1)Ukhuseleko lokusingqongileyo: GWP = 1300, ODP = 0, i-European Union iya kuvimbela ukusetyenziswa kwezixhobo ezitsha kwi-2020.
(2)Ukusebenza kwefriji: indawo yokubilisa - 26.5 °C, ukusebenza kweqondo lokushisa eliphantsi lingcono kune-R600a, kodwa umthamo wokupholisa iyunithi uphantsi, ufuna icompressor enkulu yokufuduka.
(3) Uxinzelelo lwe-condenser luphezulu ngama-50% kunolo lwe-R600a, kwaye ukusetyenziswa kwamandla okucinezela kuyanda.
3.R32 (difluoromethane)
(1)Ukhuseleko lokusingqongileyo: GWP = 675, eyi-1/2 leyo ye-R134a, kodwa iyatsha (ukuthintela umngcipheko wokuvuza).
(2)Ukusebenza kwefriji: indawo yokubilisa - i-51.7 ° C, ifanelekile kwi-air conditioners ye-inverter, kodwa uxinzelelo lwe-condensation kwifriji luphezulu kakhulu (iphindwe kabini i-R600a), enokuthi iholele ngokulula kwi-compressor overload.
4.R290 (ipropane, isikhenkcisi sehydrocarbon)
(1)Ubuhlobo bendalo: I-GWP ≈ 0, i-ODP = i-0, yinto yokuqala yokukhetha "i-refrigerant yexesha elizayo" kwi-European Union.
(2)Ukusebenza kwefriji: indawo yokubilisa – 42 °C, umthamo wokupholisa weyunithi ngama-40% ngaphezulu kwe-R600a, ilungele izikhenkcisi ezinkulu zorhwebo.
Ingqalelo:Iifriji zasekhaya kufuneka zivalwe ngokuqinileyo ngenxa yokutsha (indawo yokutshisa i-470 °C) (ixabiso linyuka nge-15%).
Ingaba ifriji iyichaphazela njani ingxolo yefriji?
Ingxolo yesikhenkcezisi isuka ikakhulu kwi-compressor vibration nakwi-refrigerant flow ingxolo. Iimpawu zesikhenkcisi zichaphazela ingxolo ngezi ndlela zilandelayo:
(1) Ukusebenza koxinzelelo oluphezulu (uxinzelelo lwe-2.5MPa), i-compressor idinga i-high-frequency operation, ingxolo inokufikelela kwi-42dB (ifriji eqhelekileyo malunga ne-38dB), i-low-pressure operation (i-condensing pressure 0.8MPa), umthwalo we-compressor uphantsi, ingxolo iphantsi njenge-36dB.
(2) I-R134a ine-viscosity ephezulu (0.25mPa · s), kwaye ithanda ukungxola (ifana nesandi esithi "hiss") xa ihamba kwityhubhu ye-capillary. I-R600a ine-viscosity ephantsi (0.11mPa · s), ukuhamba kakuhle, kunye nengxolo encitshisiweyo malunga ne-2dB.
Qaphela: Isikhenkcisi se-R290 sifuna ukongeza ugqabhuko-dubulo – uyilo lobungqina (njengomaleko wogwebu olujiyileyo), kodwa oko kunokubangela ukuba ibhokisi ivakale kwaye ingxolo inyuke nge-1 – 2dB.
Indlela yokukhetha uhlobo lwefriji yefriji?
I-R600a inengxolo ephantsi yokusetyenziswa kwekhaya, ixabiso libalelwa kwi-5% yexabiso lilonke lefriji, i-R290 inokhuseleko oluphezulu lokusingqongileyo, ihlangabezana nemigangatho ye-European Union, ixabiso lixabisa ngama-20% kune-R600a, i-R134a iyahambelana, ifanele izikhenkcisi ezindala, i-R32 ingekavuthwa, khetha ngononophelo!
I-refrigerant "igazi" lefriji, kwaye uhlobo lwayo luchaphazela ngokuthe ngqo ukusetyenziswa kwamandla, ingxolo, ukhuseleko kunye nobomi benkonzo. Kubathengi abaqhelekileyo, i-R600a lolona khetho lungcono kusetyenziso olubanzi lwangoku, kwaye i-R290 inokuthathelwa ingqalelo ekufuneni ukhuseleko olugqithisileyo lokusingqongileyo. Xa uthenga, ungaqinisekisa uhlobo lwesikhenkcezisi nge logo ye-nameplate esemva kwefriji (efana ne-“Refrigerant: R600a”) ukuze ugweme ukulahlekiswa yimiba yokuthengisa efana ne-"frequency conversion" kunye ne "frost - free".
Ixesha lokuposa: Mar-26-2025 Imibono: