Mfundo firiji firiji zachokera n'zosiyana Carnot mkombero, mmene refrigerant ndi pachimake sing'anga, ndi kutentha mu firiji amatengedwa kupita kunja kudzera gawo kusintha ndondomeko vaporization endothermic - condensation exothermic.
Zofunikira zazikulu:
①Malo otentha:Imatsimikizira kutentha kwa evaporation (kuchepetsa kuwira, kutsika kwa firiji).
②Condensing pressure:Kuthamanga kwapamwamba, kumapangitsanso kuchuluka kwa compressor (zokhudza kugwiritsa ntchito mphamvu ndi phokoso).
③Thermal conductivity:The apamwamba matenthedwe madutsidwe, mofulumira kuzirala liwiro.
Muyenera kudziwa mitundu 4 yayikulu yoziziritsira mufiriji:
1.R600a (isobutane, refrigerant ya hydrocarbon)
(1)Chitetezo cha chilengedwe: GWP (Global Warming Potential) ≈ 0, ODP (Ozone Destruction Potential) = 0, mogwirizana ndi European Union F - Malamulo a Gasi.
(2)Refrigeration bwino: powira - 11.7 °C, yoyenera chipinda chamufiriji chanyumba (-18 °C), voliyumu ya firiji mphamvu ndi pafupifupi 30% kuposa R134a, kusamutsidwa kwa kompresa ndikochepa, komanso kugwiritsa ntchito mphamvu kumakhala kochepa.
(3)Kufotokozera kwa nkhani: Firiji ya 190L imagwiritsa ntchito R600a, ndi mphamvu ya tsiku ndi tsiku ya madigiri 0,39 (mulingo wa mphamvu 1).
2.R134a (tetrafluoroethane)
(1)Chitetezo cha chilengedwe: GWP = 1300, ODP = 0, European Union iletsa kugwiritsa ntchito zida zatsopano kuyambira 2020.
(2)Refrigeration bwino: kuwira mfundo - 26.5 °C, otsika kutentha ntchito bwino kuposa R600a, koma unit kuzirala mphamvu ndi otsika, amafuna lalikulu kusamutsidwa kompresa.
(3) Kuthamanga kwa condenser ndi 50% kuposa kwa R600a, ndipo mphamvu yogwiritsira ntchito kompresa ikuwonjezeka.
3.R32 (difluoromethane)
(1)Chitetezo cha chilengedwe: GWP = 675, yomwe ndi 1/2 ya R134a, koma imatha kuyaka (kupewa ngozi yotuluka).
(2)Refrigeration bwino: malo otentha - 51.7 ° C, oyenera ma inverter air conditioners, koma kuthamanga kwa condensation mufiriji ndipamwamba kwambiri (kawiri kuposa R600a), zomwe zingayambitse mosavuta compressor.
4.R290 (propane, hydrocarbon refrigerant)
(1)Kukonda chilengedwe: GWP ≈ 0, ODP = 0, ndiye chisankho choyamba cha "firiji yamtsogolo" ku European Union.
(2)Refrigeration bwino: powira - 42 °C, kuzirala kwa unit 40% kuposa R600a, yoyenera mafiriji akuluakulu ogulitsa malonda.
Chenjerani:Mafiriji apakhomo amayenera kutsekedwa mwamphamvu chifukwa chakuyaka (malo oyatsira 470 ° C) (mtengo wakwera ndi 15%).
Kodi refrigerant imakhudza bwanji phokoso la firiji?
Phokoso la firiji makamaka limachokera ku kugwedezeka kwa kompresa ndi phokoso loyenda mufiriji. Makhalidwe a refrigerant amakhudza phokoso m'njira izi:
(1) Kuthamanga kwapamwamba (kuthamanga kwa 2.5MPa), kompresa imafuna ntchito yapamwamba - pafupipafupi, phokoso limatha kufika 42dB (firiji wamba pafupifupi 38dB), otsika - kuthamanga (kuthamanga kwa 0.8MPa), katundu wa compressor ndi wotsika, phokoso ndilotsika ngati 36dB.
(2) R134a ili ndi kukhuthala kwakukulu (0.25mPa · s), ndipo imakonda kumveka phokoso (lofanana ndi phokoso la "hiss") pamene ikuyenda kupyolera mu chubu cha capillary. R600a ili ndi mamasukidwe otsika (0.11mPa · s), kuyenda bwino, komanso phokoso lochepa ndi pafupifupi 2dB.
Zindikirani: Firiji ya R290 ikufunika kuwonjezera kuphulika - kapangidwe ka umboni (monga chithovu chokhuthala), koma chingapangitse kuti bokosilo limveke komanso phokoso likwere ndi 1 - 2dB.
Momwe mungasankhire mtundu wa firiji wa furiji?
R600a ili ndi phokoso lochepa la ntchito zapakhomo, mtengo wake ndi 5% ya mtengo wonse wa firiji, R290 ili ndi chitetezo chokwanira cha chilengedwe, imakwaniritsa miyezo ya European Union, mtengo wake ndi 20% wokwera mtengo kuposa R600a, R134a imagwirizana, yoyenera firiji yakale, R32 ndi yosakhwima, sankhani mosamala!
Refrigerant ndi "magazi" a firiji, ndipo mtundu wake umakhudza mwachindunji kugwiritsa ntchito mphamvu, phokoso, chitetezo ndi moyo wautumiki. Kwa ogula wamba, R600a ndiye chisankho chabwino kwambiri pakugwira ntchito kwanthawi zonse, ndipo R290 ikhoza kuganiziridwa pofuna kuteteza chilengedwe. Pogula, mukhoza kutsimikizira mtundu wa refrigerant kupyolera mu chizindikiro cha nameplate kumbuyo kwa firiji (monga "Refrigerant: R600a") kuti musasocheretsedwe ndi malingaliro a malonda monga "kutembenuka kwafupipafupi" ndi "chisanu - kwaulere".
Nthawi yotumiza: Mar-26-2025 Maonedwe: