Mfundo yoziziritsira firiji imachokera ku kayendedwe ka Carnot, komwe refrigerant ndiye pakati, ndipo kutentha mufiriji kumatengedwa kupita kunja kudzera mu njira yosinthira gawo la vaporization endothermic - condensation exothermic.
Magawo ofunikira:
①Malo otentha:Zimazindikira kutentha kwa evaporation (kutentha kotsika, kutentha kwa firiji kotsika).
②Kupanikizika kwa condensing:Kupanikizika kukakwera, mphamvu ya compressor imakulanso (zomwe zimakhudza mphamvu zomwe zimagwiritsidwa ntchito komanso phokoso).
③Kutentha kwa ma conductivity:Kutentha kukakwera kwambiri, kuzizira kumathamanga kwambiri.
Muyenera kudziwa mitundu ikuluikulu inayi ya mphamvu yoziziritsira mufiriji:
1.R600a (isobutane, choziziritsira cha hydrocarbon)
(1)Kuteteza chilengedwe: GWP (Kuthekera Kotentha Padziko Lonse) ≈ 0, ODP (Kuthekera Kowononga Ozone) = 0, mogwirizana ndi malamulo a European Union F - Gas.
(2)Kugwiritsa ntchito bwino mufiriji: kutentha kotentha - 11.7 °C, koyenera kugwiritsidwa ntchito m'firiji ya m'nyumba (-18 °C), mphamvu yosungiramo firiji ndi yokwera ndi pafupifupi 30% kuposa R134a, kusuntha kwa compressor ndi kochepa, ndipo mphamvu yogwiritsira ntchito ndi yochepa.
(3)Kufotokozera mlandu: Firiji ya 190L imagwiritsa ntchito R600a, ndipo mphamvu yake tsiku lililonse imagwiritsa ntchito madigiri 0.39 (mlingo 1 wogwiritsira ntchito mphamvu moyenera).
2.R134a (tetrafluoroethane)
(1)Kuteteza chilengedwe: GWP = 1300, ODP = 0, European Union idzaletsa kugwiritsa ntchito zida zatsopano kuyambira 2020.
(2)Kugwiritsa ntchito bwino mufiriji: kutentha kotentha - 26.5 °C, kutentha kotsika kumakhala bwino kuposa R600a, koma mphamvu yoziziritsira ya chipangizocho ndi yotsika, zomwe zimafuna compressor yayikulu yosuntha.
(3) Kupanikizika kwa condenser ndi 50% kuposa kwa R600a, ndipo mphamvu ya compressor imawonjezeka.
3.R32 (difluoromethane)
(1)Kuteteza chilengedwe: GWP = 675, yomwe ndi theka la R134a, koma imatha kuyaka (kupewa chiopsezo cha kutayikira).
(2)Kugwiritsa ntchito bwino mufiriji: kutentha kotentha - 51.7 °C, koyenera ma air conditioner osinthira kutentha, koma mphamvu ya condensation mufiriji ndi yokwera kwambiri (kuwirikiza kawiri kuposa R600a), zomwe zingayambitse kudzaza kwa compressor.
4.R290 (propane, choziziritsira cha hydrocarbon)
(1)Ubwino wa chilengedwe: GWP ≈ 0, ODP = 0, ndiye chisankho choyamba cha "future refrigerant" mu European Union.
(2)Kugwiritsa ntchito bwino mufiriji: kutentha kotentha - 42 °C, mphamvu yozizira ya unit ndi 40% kuposa R600a, yoyenera mafiriji akuluakulu amalonda.
Chenjezo:Mafiriji a m'nyumba ayenera kutsekedwa bwino chifukwa amatha kuyaka (kutentha kwambiri 470 °C) (mtengo wake umakwera ndi 15%).
Kodi refrigerant imakhudza bwanji phokoso la firiji?
Phokoso la firiji limachokera makamaka ku kugwedezeka kwa compressor ndi phokoso la kayendedwe ka firiji. Makhalidwe a firiji amakhudza phokoso m'njira zotsatirazi:
(1) Kugwiritsa ntchito mphamvu yamagetsi (kupopera mphamvu ya 2.5MPa), compressor imafunika kugwiritsa ntchito mphamvu yamagetsi ...
(2) R134a ili ndi kukhuthala kwakukulu (0.25mPa · s), ndipo imakonda kukhala ndi phokoso lothamanga (lofanana ndi phokoso la "hiss") ikadutsa mu chubu cha capillary. R600a ili ndi kukhuthala kochepa (0.11mPa · s), kuyenda bwino, komanso phokoso lochepa ndi pafupifupi 2dB.
Zindikirani: Firiji ya R290 iyenera kuwonjezera kapangidwe kolimba (monga thovu lokhuthala), koma ingayambitse kuti bokosilo lizimveka bwino ndipo phokoso lizikwera ndi 1 - 2dB.
Kodi mungasankhe bwanji mtundu wa firiji?
R600a ili ndi phokoso lochepa logwiritsidwa ntchito kunyumba, mtengo wake ndi 5% ya mtengo wonse wa firiji, R290 ili ndi chitetezo champhamvu cha chilengedwe, ikukwaniritsa miyezo ya European Union, mtengo wake ndi wokwera mtengo ndi 20% kuposa R600a, R134a imagwirizana, yoyenera mafiriji akale, 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 bwino kwamakono, ndipo R290 ikhoza kuganiziridwa kuti iteteze chilengedwe kwambiri. Mukagula, mutha kutsimikizira mtundu wa refrigerant kudzera mu logo ya nameplate kumbuyo kwa firiji (monga "Refrigerant: R600a") kuti musasocheretsedwe ndi malingaliro otsatsa monga "kusintha pafupipafupi" ndi "opanda chisanu".
Nthawi yolemba: Marichi-26-2025 Mawonedwe: