Nyob rau hauv lub tub yees tso saib txee tub yees tshuab, Frost tsim nyob rau hauv evaporator nto yog ib qho tshwm sim. Frost tsim tsub kom thermal tsis kam thiab huab cua ntws tsis kam, yog li cuam tshuam rau cov cua sov hloov ntawm cov evaporator nto thiab qhov kub thiab txias faib rau hauv lub txee. Tshwj xeeb tshaj yog nyob rau hauv qis - qhov kub thiab txias - qhov chaw noo noo, evaporator frosting ncaj qha cuam tshuam rau kev nyab xeeb thiab ruaj khov ua haujlwm ntawm evaporator thiab tag nrho cov kab ke. Yog li ntawd, cov kws tshawb fawb hauv tebchaws thiab thoob ntiaj teb tau tshawb fawb ntau yam ntawm evaporator frosting thiab defrosting technologies.
1. Evaporator Frosting
Evaporator frosting tsub kom lub thermal tsis kam ntawm nws qhov chaw tshav kub hloov, txo tag nrho cov tshav kub hloov coefficient, thiab ua rau muaj teeb meem xws li txo cov cua tshaj tawm ntawm lub qhov hluav taws xob cua qhov hluav taws xob, nce zaub mov kub nyob rau hauv lub txee, thiab nce lub zog noj ntawm cov zaub txee. Yog li ntawd, kawm txog cov txheej txheem ntawm evaporator frosting thiab tshawb nrhiav txoj hauv kev zoo los tiv thaiv defrosting yeej ib txwm yog qhov tseem ceeb ntawm cov kws tshawb fawb hauv tsev thiab txawv teb chaws. Mao et al. pom los ntawm kev sim cov kev tshawb fawb uas tsis ncaj qha tub yees siv cov poov tshuaj ntsev raws li cov tub yees muaj ntau yam sib xws thiab muaj zog frosting ntawm lub tshav kub exchanger piv rau R404A refrigerant systems, uas ua rau shortens lub sij hawm defrosting thiab txo cov defrosting txias load ntawm cov zaub txee. Cov kws tshawb fawb tau thov kom ntxiv cov dehumidifying ua ntej - txias ua ntej lub evaporator. Cov txiaj ntsig kev sim qhia tau hais tias txoj kev no txhim kho lub peev xwm sib khi ntawm cov ntaub thaiv huab cua, ncua lub sijhawm defrosting, thiab ua lub luag haujlwm tseem ceeb hauv kev ua kom zoo thiab kev nyab xeeb ntawm cov zaub mov. Yuan Pei siv plaub qhov sib luag evaporator modules los hloov cov evaporator ib txwm. Thaum lub sij hawm defrosting, cov modular evaporators defrost sequentially, kom ntseeg tau tias qee cov evaporators tseem refrigerating thaum lub sij hawm defrosting, yog li zoo txo qhov hloov pauv ntawm cov zaub mov kub thaum lub sij hawm defrosting.
2. Evaporator Defrosting Technology
Cov tub yees tso saib txee muaj ntau txoj kev defrosting. Ib txoj hauv kev tsim nyog defrosting yuav tsum ua rau qhov kub tsawg tshaj plaws hauv lub txee thaum lub sij hawm defrosting thiab cuam tshuam tsawg heev rau cov zaub mov zoo thiab ib puag ncig. Txawv defrosting txoj kev muaj lawv tus kheej zoo thiab qhov tsis zoo. Faramarzi tau taw qhia tias nyob rau hauv cov txheej txheem hluav taws xob cua sov defrosting, tsuas yog 15% ntawm cov cua sov yog siv rau defrosting lub evaporator nto, thiab cov seem cua sov yog dissipated mus rau hauv lub sab hauv ntawm cov zaub txee, yog li ua rau lub tshav kub load ntawm cov zaub txee. Txawm hais tias cov kws tshawb fawb hauv tsev thiab thoob ntiaj teb tau tshawb fawb ntau txog cov teeb meem ntawm evaporator frosting thiab defrosting teeb meem, thiab kev txhim kho tseem ceeb tau ua rau txo qis cov evaporator frost accumulation, txuas ntxiv defrosting cycles, thiab txhim kho cov txheej txheem defrosting, ntau qhov kev tshawb fawb no tseem txwv rau kev kawm tsuas yog ib qho ntawm qhov teeb meem. Nyob rau hauv kev muaj tiag, raws li tus nqi ntawm Frost nyob rau hauv lub evaporator nto nce, lub thermal kuj ntawm lub tshav kub exchanger nto nce, ua rau ib tug txo nyob rau hauv cov huab cua tshaj tawm ntawm lub qhov hluav taws xob curtain qhov hluav taws xob, yog li cuam tshuam rau kev ruaj ntseg ntawm lub tub yees system. Yog li ntawd, kev tshawb fawb dav dav uas txiav txim siab txog cov khoom noj khoom noj khoom noj khoom haus evaporator, huab cua kab hlau rhuav, tub yees system, thiab lub khw muag khoom ib puag ncig yog xav tau.
