西安交通大學(xué)熱能與動(dòng)力工程專業(yè)本科畢業(yè)設(shè)計(jì)論文

1、西安交通大學(xué)熱能與動(dòng)力工程專業(yè)本科畢業(yè)設(shè)計(jì)論文IBCD450BCD450型風(fēng)冷式家用冰箱制冷系統(tǒng)設(shè)計(jì)型風(fēng)冷式家用冰箱制冷系統(tǒng)設(shè)計(jì)摘要為滿足人們現(xiàn)代化生活方式的需要目前家用電冰箱正在向大型化、多功能、多溫區(qū)、多用途的方向發(fā)展。風(fēng)冷式冰箱以其自動(dòng)除霜、大容量、多功能等諸多優(yōu)點(diǎn)而越來(lái)越受到消費(fèi)者的青睞。近年來(lái)國(guó)內(nèi)冰箱生產(chǎn)商開(kāi)始了風(fēng)冷冰箱的開(kāi)發(fā)高潮。但大容積風(fēng)冷冰箱存在控溫不準(zhǔn)和耗電量高等技術(shù)難點(diǎn)對(duì)于風(fēng)冷冰箱的精確控溫和降低耗電量現(xiàn)在國(guó)內(nèi)的冰箱

2、企業(yè)多采用“經(jīng)驗(yàn)試驗(yàn)”的設(shè)計(jì)方法。本文在設(shè)計(jì)風(fēng)冷冰箱BCD450W的過(guò)程中通過(guò)對(duì)冰箱進(jìn)行熱交換計(jì)算、選用合理的保溫層厚度、采用超低熱傳導(dǎo)系數(shù)的中空隔熱板保溫材料、采用雙層密封設(shè)等方法降低冰箱的耗電量，采用高效壓縮機(jī)，合理的優(yōu)化系統(tǒng)來(lái)達(dá)到效果。本論文詳細(xì)的說(shuō)明了如何設(shè)計(jì)一臺(tái)450L的風(fēng)冷冰箱的步驟和相關(guān)的計(jì)算方法。例如絕熱層厚度的選擇、冰箱外壁面的防露校核、制冷系統(tǒng)的熱力計(jì)算、壓縮機(jī)的選型、蒸發(fā)器和冷凝器的熱力計(jì)算及毛細(xì)管長(zhǎng)度的計(jì)算等。例

3、如，在箱體熱負(fù)荷計(jì)算過(guò)程中，要迅速確定箱體的主要漏熱方式及對(duì)應(yīng)的漏熱量。而在對(duì)于冰箱使用過(guò)程所常見(jiàn)的一些故障：壓縮機(jī)不啟動(dòng)，不制冷，不除霜等。我們也需要簡(jiǎn)單的了解一些，以免不正確的操作影響冰箱的制冷效果。關(guān)鍵詞：風(fēng)冷式冰箱，制冷系統(tǒng)，熱力設(shè)計(jì)ABSTRACTIIIABSTRACTTomeettheneedsofthemodernlifestylehouseholdrefrigeratisexpectedtobelargescalemul

4、tifunctionmultitemperaturemultipurpose.Aircooledrefrigeratwithitsautomaticdefrostlargecapacitymultifunctionmanyotheradvantagesmemegetsthefavourofconsumers.Inrecentyearsthedomesticrefrigeratmanufacturerskeenonthedevelopme

5、ntofaircooledrefrigerats.Butlargecapacityaircooledrefrigerathastheshtcomingofinaccuratetemperaturecontrolhighpowerconsumption.Tocontrolthetemperaturepreciselyreducingthepowerconsumptionaircooledrefrigerattheprecisecontro

6、lofmildlowerpowerconsumptionnowdomesticrefrigeratenterprisesadoptthedesignmethodof“experience&test“.DuringthedesignprocessofBCD450Waircooledrefrigeratinthispaperthroughcalculatingtheheattransferfrefrigeratweadoptaproperi

7、nsulationthicknessacavityinsulationboardmadefromultralowthermalconductivitymaterialsadoublesealeddesigntoreducethepowerconsumption.Thispaperillustratesindetailthestepscomputingmethodstodesigna450Laircooledrefrigeratinclu

8、dingthechoiceoftheinsulationthicknessantidewcheckontheouterwalloftherefrigeratthethermodynamiccalculationofthecoolingsystemthecompressionthethermodynamiccalculationoftheevapatcondenserthelengthcalculationofthecapillary.F

9、instanceintheprocessofthebodyheatloadcalculationitmustbequicklytodeterminethemainheatleakagewaythecrespondingvalue.Indertoavoidthebadimpactonthechillingperfmanceofincrectoperatewealsoneedtolearnsomecommonfaultsinrefriger