Pfungwa yekutonhodza firiji yakavakirwa pa reverse Carnot cycle, umo refrigerant ndiyo inonyanya kushandiswa, uye kupisa kuri mufiriji kunotakurwa kuenda kunze kuburikidza nechikamu chekuchinja kwevaporization endothermic - condensation exothermic.
Zvikamu zvikuru:
①Pokufashaira:Inotarisa tembiricha yekubuda kwemvura (kana kufashaira kwadzikira, kana kutonhora kwadzikira).
②Kumanikidzwa kwekudzikisa:Kumanikidzwa kwacho kwakakwira, mutoro wecompressor unowedzera (zvichikanganisa kushandiswa kwesimba uye ruzha).
③Kufambisa kwekupisa:Kana kupisa kuchikwira, kutonhora kunokurumidza.
Unofanira kuziva mhando ina huru dzekushanda zvakanaka kwekutonhodza mufiriji:
1.R600a (isobutane, hydrocarbon refrigerant)
(1)Kudzivirirwa kwezvakatipoteredza: GWP (Global Warming Potential) ≈ 0, ODP (Ozone Destruction Potential) = 0, zvichienderana neEuropean Union F - Gas regulations.
(2)Kushanda zvakanaka mufiriji: pokufashaira - 11.7 °C, yakakodzera nzvimbo yefiriji yemumba (-18 °C), kugona kwefiriji yeyuniti kwakakwira ne30% kupfuura R134a, kufambiswa kwecompressor kudiki, uye kushandiswa kwesimba kwakaderera.
(3)Tsananguro yenyaya: Firiji ye190L inoshandisa R600a, ichishandisa simba remadhigirii 0.39 pazuva (danho rekutanga rekushandisa simba).
2.R134a (tetrafluoroethane)
(1)Kudzivirirwa kwezvakatipoteredza: GWP = 1300, ODP = 0, European Union icharambidza kushandiswa kwemidziyo mitsva kubva muna 2020.
(2)Kushanda zvakanaka mufiriji: pokufashaira - 26.5 °C, kushanda kwetembiricha yakaderera kuri nani pane R600a, asi kugona kutonhora kweyuniti kwakaderera, zvichida compressor yakakura yekudzima.
(3) Kumanikidzwa kwekondensa kwakakwira ne50% kupfuura kweR600a, uye kushandiswa kwesimba recompressor kwakawedzera.
3.R32 (difluoromethane)
(1)Kudzivirirwa kwezvakatipoteredza: GWP = 675, inova chikamu chimwe muzvina cheR134a, asi inogona kutsva (kudzivirira njodzi yekubuda kwemvura).
(2)Kushanda zvakanaka mufiriji: pombi yekufashaira – 51.7 °C, yakakodzera ma inverter air conditioners, asi kumanikidzwa kwe condensation mufiriji kwakanyanya (kwakapetwa kaviri kupfuura R600a), izvo zvinogona kukonzera kuti compressor iwedzere kuwanda.
4.R290 (propane, hydrocarbon refrigerant)
(1)Hushamwari hwezvakatipoteredza: GWP ≈ 0, ODP = 0, ndiyo sarudzo yekutanga ye "future refrigerant" muEuropean Union.
(2)Kushanda zvakanaka mufiriji: pokufashaira - 42 °C, kugona kutonhora kweyuniti kwakakwira ne40% kupfuura R600a, yakakodzera mafiriji makuru ekutengeserana.
Kuchenjerera:Mafiriji emumba anofanira kuvharwa zvakasimba nekuda kwekubvira moto (nzvimbo yekubatidza 470 °C) (mutengo unowedzera ne15%).
Refrigerant inokanganisa sei ruzha rwefiriji?
Ruzha rwemufiriji runonyanya kubva mukudzungudza kwecompressor uye ruzha rwekuyerera kwemufiriji. Hunhu hwemufiriji hunokanganisa ruzha nenzira dzinotevera:
(1) Kushanda nesimba rakawanda (kumanikidzwa kwekudzikisa 2.5MPa), compressor inoda kushanda nesimba rakawanda, ruzha runogona kusvika 42dB (firiji yakajairika inosvika 38dB), kushanda nesimba rakaderera (kumanikidzwa kwekudzikisa 0.8MPa), mutoro wecompressor wakaderera, ruzha rwakaderera kusvika 36dB.
(2) R134a ine viscosity yakakwira (0.25mPa · s), uye inokurumidza kuita ruzha rwekukanda (rwakafanana nerwiyo rwekuti "hiss") kana ichiyerera nemuchubhu ye capillary. R600a ine viscosity yakaderera (0.11mPa · s), kuyerera kwayo kwakapfava, uye ruzha rwakaderera neinenge 2dB.
Cherechedza: Firiji yeR290 inofanira kuwedzera dhizaini isingaputike (senge foam layer yakakora), asi inogona kukonzera kuti bhokisi riite ruzha uye ruzha rukwire ne1 - 2dB.
Ungasarudza sei rudzi rwefiriji refriji?
R600a ine ruzha rwakaderera rwekushandisa pamba, mutengo wayo unosvika 5% yemutengo wese wefiriji, R290 ine dziviriro yepamusoro yezvakatipoteredza, inosangana nezvinodiwa neEuropean Union, mutengo wayo unodhura ne20% pane R600a, R134a inoenderana, yakakodzera firiji dzekare, R32 haina kukura zvakanaka, sarudza nokungwarira!
Refrigerant i "ropa" refiriji, uye rudzi rwayo runokanganisa zvakananga kushandiswa kwesimba, ruzha, kuchengetedzeka uye hupenyu hwebasa. Kune vatengiwo zvavo, R600a ndiyo sarudzo yakanakisisa yekushanda kwakazara, uye R290 inogona kutariswa pakutsvaga kuchengetedzwa kwakanyanya kwezvakatipoteredza. Paunenge uchitenga, unogona kusimbisa rudzi rwerefrigerant kuburikidza nechiratidzo chezita riri kumashure kwefiriji (senge "Refrigerant: R600a") kuti usatsauswe nepfungwa dzekushambadzira dzakadai se "frequency conversion" uye "free frost".
Nguva yekutumira: Kurume-26-2025 Maonero: