Ụkpụrụ refrigeration nke refrjiraeto dabeere na ntụgharị Carnot okirikiri, nke refrigerant bụ isi ihe, na okpomọkụ dị na refrjiraeto na-ebuga n'èzí site na usoro mgbanwe mgbanwe nke vaporization endothermic - condensation exothermic.
Igodo akara:
①Ebe esi mmiri:Na-ekpebi okpomọkụ evaporation (na-ebelata ebe a na-esi esi, na-ebelata okpomọkụ refrigeration).
②Nrụgide nrụgide:Ihe dị elu nke nrụgide ahụ, ibu ibu compressor (na-emetụta ike ike na mkpọtụ).
③Nrụpụta ọkụ:Nke dị elu na conductivity thermal, ngwa ngwa oyi na-agba ọsọ.
Ị ga-amarịrị ụdị 4 bụ isi nke nrụpụta refrigerant:
1.R600a (isobutane, hydrocarbon refrigerant)
(1)Nchekwa gburugburu ebe obibi: GWP (Ike Okpomọkụ zuru ụwa ọnụ) ≈ 0, ODP (nwere ike imebi ozone) = 0, kwekọrọ na European Union F - ụkpụrụ gas.
(2)Nrụ ọrụ refrigeration: ebe a na-esi esi - 11.7 Celsius C, dabara adaba maka ụlọ friza friji (-18 Celsius C) chọrọ, ikike refrigeration nke unit dị ihe dị ka 30% karịa R134a, mbugharị compressor dị obere, yana oriri ike dị ala.
(3)Nkọwa okwu: Igwe nju oyi 190L na-eji R600a, na-eji ike ike kwa ụbọchị nke 0.39 degrees (ọkwa arụmọrụ ike 1).
2.R134a (tetrafluoroethane)
(1)Nchekwa gburugburu ebe obibi: GWP = 1300, ODP = 0, European Union ga-amachibido iji ngwa ọhụrụ eme ihe site na 2020.
(2)Nrụ ọrụ refrigeration: esi ebe - 26,5 Celsius C, obere okpomọkụ arụmọrụ dị mma karịa R600a, ma unit jụrụ ike dị ala, na-achọ a nnukwu displacement compressor.
(3) Nrụgide condenser bụ 50% dị elu karịa nke R600a, na ike ike compressor na-abawanye.
3.R32 (difluoromethane)
(1)Nchekwa gburugburu ebe obibi: GWP = 675, nke bụ 1/2 nke R134a, mana ọ na-ere ọkụ (iji gbochie ihe ize ndụ ntanye).
(2)Nrụ ọrụ refrigeration: ebe esi mmiri - 51.7 Celsius C, dabara adaba maka ikuku ikuku inverter, mana nrụgide condensation na refrjiraeto dị oke elu (ugboro abụọ dị elu dị ka R600a), nke nwere ike ibute ibu compressor ngwa ngwa.
4.R290 (propane, hydrocarbon refrigerant)
(1)Enyi na gburugburu ebe obibi: GWP ≈ 0, ODP = 0, bụ nhọrọ mbụ nke "refrigerant n'ọdịnihu" na European Union.
(2)Nrụ ọrụ refrigeration: esi esi - 42 Celsius C, unit jụrụ ike 40% elu karịa R600a, adabara nnukwu azụmahịa freezers.
Nlebara anya:Ọ dị mkpa ka akpọchie friji ụlọ nke ọma n'ihi ọkụ ọkụ (ebe mgbanye 470 Celsius) (ọnụahịa na-abawanye site na 15%).
Kedu ka refrigerant si emetụta mkpọtụ friji?
Mkpọtụ refrigerator na-abịakarị site na mkpọtụ compressor na mkpọtụ erute refrigerant. Njirimara refrigerant na-emetụta mkpọtụ n'ụzọ ndị a:
(1) Ọrụ nrụgide dị elu (nrụgide nrụgide 2.5MPa), mkpakọ mkpakọ chọrọ elu - ọrụ ugboro ugboro, ụda ahụ nwere ike iru 42dB (nri refrjiraeto nkịtị banyere 38dB), ala - arụ ọrụ nrụgide (nrụgide nrụgide 0.8MPa), ibu compressor dị ala, mkpọtụ dị ka 36dB.
(2) R134a nwere nnukwu viscosity (0.25mPa · s), ma na-enwekarị ụda mkpọtụ (dị ka ụda "ya") mgbe ọ na-agafe na tube capillary. R600a nwere viscosity dị ala (0.11mPa · s), ịgba ọsọ na-adị nro, yana mbelata mkpọtụ site na ihe dịka 2dB.
Rịba ama: Igwe nju oyi R290 kwesịrị ịgbakwunye mgbawa - ihe akaebe (dịka oyi akwa ụfụfụ), ma ọ nwere ike ime ka igbe ahụ na-emegharị na mkpọtụ na-ebili site na 1 - 2dB.
Kedu otu esi ahọrọ ụdị refrigerant refrjiraeto?
R600a nwere obere mkpọtụ maka iji ụlọ eme ihe, ọnụ ahịa na-akwụ 5% nke ngụkọta ọnụ ahịa refrjiraeto, R290 nwere nchebe gburugburu ebe obibi dị elu, na-ezute ụkpụrụ European Union, ọnụ ahịa 20% dị ọnụ karịa R600a, R134a dakọtara, dabara adaba maka friji ochie, R32 etobeghị, họrọ nke ọma!
Refrigerant bụ "ọbara" nke refrjiraeto, na ụdị ya na-emetụta ike oriri, mkpọtụ, nchekwa na ndụ ọrụ. Maka ndị na-azụ ahịa nkịtị, R600a bụ nhọrọ kachasị mma maka ịrụ ọrụ zuru oke ugbu a, yana R290 enwere ike ịtụle maka ịchụso oke nchekwa gburugburu ebe obibi. Mgbe ị na-azụrụ ihe, ị nwere ike kwado ụdị refrigerant site na akara akara aha dị n'azụ refrjiraeto (dịka "Refrigerant: R600a") ka ị ghara iduhie ya site na echiche ahịa dịka "ntụgharị ugboro ugboro" na "frost - free".
Oge nzipu: Nleba Mar-26-2025: