Hoʻokumu ʻia ka loina refrigeration o ka pahu hau ma ka huli ʻana o Carnot, kahi o ka refrigerant ke kumu kumu, a lawe ʻia ka wela i loko o ka friji i waho ma o ke kaʻina hana hoʻololi o ka vaporization endothermic - condensation exothermic.
Nā ʻāpana kī:
①Lae paila:Hoʻoholo i ka mahana evaporation (ʻo ka haʻahaʻa o ka paila paila, ʻo ka haʻahaʻa o ka wela o ka refrigeration).
②Pumi condensing:ʻO ke kiʻekiʻe o ke kaomi, ʻoi aku ka nui o ka ukana compressor (e pili ana i ka hoʻohana ʻana i ka ikehu a me ka walaʻau).
③ʻO ke kau wela wela:ʻOi aku ka kiʻekiʻe o ka thermal conductivity, ʻoi aku ka wikiwiki o ka māmā hoʻolili.
Pono ʻoe e ʻike i nā ʻano nui 4 o ka pono hoʻoheheʻe refrigerant:
1.R600a (isobutane, mea hoʻoheheʻe hydrocarbon)
(1)Palekana kaiapuni: GWP (Global Warming Potential) ≈ 0, ODP (Ozone Destruction Potential) = 0, e like me ka European Union F - Nā hoʻoponopono Gas.
(2)ʻO ka pono o ka refrigeration: wahi paila - 11.7 °C, kūpono no ka hale pahu hau hau hau (-18 °C) koi, ʻo ka nui o ka nui o ka refrigeration ma kahi o 30% kiʻekiʻe ma mua o R134a, liʻiliʻi ka neʻe ʻana o ka compressor, a haʻahaʻa ka hoʻohana ʻana i ka ikehu.
(3)Ka wehewehe hihia: Hoʻohana ka pahu hau 190L i ka R600a, me ka hoʻohana mana o kēlā me kēia lā he 0.39 degere (ka pae ikehu 1).
2.R134a (tetrafluoroethane)
(1)Palekana kaiapuni: GWP = 1300, ODP = 0, e pāpā ka European Union i ka hoʻohana ʻana i nā mea hou mai 2020.
(2)ʻO ka pono o ka refrigeration: wahi hoʻolapalapa – 26.5 °C, ʻoi aku ka maikaʻi o ka hana haʻahaʻa haʻahaʻa ma mua o R600a, akā haʻahaʻa ka mana hoʻomaha hoʻomaha, e koi ana i kahi compressor hoʻoneʻe nui.
(3) He 50% kiʻekiʻe ke kaomi condenser ma mua o ka R600a, a ua hoʻonui ʻia ka hoʻohana ʻana i ka ikehu compressor.
3.R32 (difluoromethane)
(1)Palekana kaiapuni: GWP = 675, ʻo ia ka 1/2 o ka R134a, akā hiki ke lapalapa (e pale i ka pilikia leakage).
(2)ʻO ka pono o ka refrigeration: wahi paila - 51.7 °C, kūpono no ka inverter air conditioners, akā, ke kiʻekiʻe o ka condensation kaomi i loko o ka friji (ʻelua manawa kiʻekiʻe e like me R600a), hiki ke alakaʻi maʻalahi i ka overload compressor.
4.R290 (propane, hydrocarbon refrigerant)
(1)Aloha kaiapuni: ʻO GWP ≈ 0, ODP = 0, ʻo ia ka koho mua o ka "mea hoʻoheheʻe e hiki mai ana" ma ka Hui ʻEulopa.
(2)ʻO ka pono o ka refrigeration: wahi hoʻolapalapa – 42 °C, ka mana hoʻoluʻu ʻāpana 40% kiʻekiʻe aʻe ma mua o R600a, kūpono no nā pahu pāʻoihana nui.
Nānā:Pono e hoʻopaʻa paʻa ʻia nā pahu hau o ka hale ma muli o ka hiki ʻana o ke ahi (ignition point 470 °C) (hoʻonui ke kumukūʻai ma 15%).
Pehea ka hopena o ka pahu hau i ka leo o ka pahu hau?
ʻO ka walaʻau pahu hau ka nui mai ka haʻalulu compressor a me ka leo kahe o ka refrigerant. Hoʻopili nā ʻano refrigerant i ka walaʻau ma kēia mau ʻano:
(1) High - pressure hana (condensing pressure 2.5MPa), pono ka compressor kiʻekiʻe-frequency hana, hiki i ka walaʻau ke hiki i 42dB (maʻamau friji e pili ana i 38dB), haʻahaʻa - kaomi hana (condensing pressure 0.8MPa), haʻahaʻa ka haʻahaʻa compressor, haʻahaʻa ka walaʻau e like me 36dB.
(2) He viscosity kiʻekiʻe ka R134a (0.25mPa · s), a hiki i ka leo throttling (e like me ke kani "hiss") i ka wā e kahe ana i ka paipu capillary. Loaʻa iā R600a ka viscosity haʻahaʻa (0.11mPa · s), ʻoi aku ka maʻalahi o ke kahe, a hoʻemi ʻia ka walaʻau ma kahi o 2dB.
'Ōlelo Aʻo: Pono ka pahu friji R290 e hoʻohui i kahi hoʻolālā pahū-hōʻoia (e like me kahi ʻāpana ʻōhuhi mānoanoa), akā hiki ke hoʻoulu i ka pahu a piʻi ka walaʻau ma 1 - 2dB.
Pehea e koho ai i kahi ʻano refrigerant?
He haʻahaʻa haʻahaʻa ʻo R600a no ka hoʻohana ʻana i ka home, ʻo ke kumukūʻai no 5% o ka huina o ke kumukūʻai o ka pahu friji, he kiʻekiʻe ʻo R290 i ka mālama ʻana i ke kaiapuni, kū i nā kūlana European Union, ʻoi aku ke kumukūʻai ma mua o R600a, ʻoi aku ka maikaʻi o R134a, kūpono no nā friji kahiko, ʻaʻole ʻo R32, koho pono!
ʻO ka refrigerant ka "koko" o ka friji, a pili pono kona ʻano i ka hoʻohana ʻana i ka ikehu, ka walaʻau, ka palekana a me ke ola lawelawe. No nā mea kūʻai maʻamau, ʻo R600a ka koho maikaʻi loa no ka hana piha o kēia manawa, a hiki ke noʻonoʻo ʻia ʻo R290 no ka ʻimi ʻana i ka pale kūlohelohe. I ke kūʻai ʻana, hiki iā ʻoe ke hōʻoia i ke ʻano o ka refrigerant ma o ka inoa papa inoa ma ke kua o ka pahu hau (e like me "Refrigerant: R600a") e pale aku i ka hoʻopunipuni ʻia e nā manaʻo kūʻai aku e like me ka "hoʻololi pinepine" a me ka "hau - manuahi".
Ka manawa hoʻouna: Mar-26-2025 Nānā: