Lokacin da yanayin ƙanƙara na tsarin ajiyar sanyi na sanyi ya yi ƙasa da 0 ° C, ƙaramin sanyi zai bayyana a saman mashin ɗin, yana shafar ingancin canjin zafi. Saboda haka, defrosting akai-akai shima muhimmin bangare ne na kiyaye ajiyar sanyi. Akwai hanyoyi da yawa don defrost. A halin yanzu, masana'antun gine-ginen sanyi suna amfani da hanyoyi guda biyar: narke ɗanɗano na wucin gadi, narkewar wutar lantarki, narke iska mai zafi, daskarewa ruwa, kawar da ruwan zafi mai zafi.
1. Manual defrosting shi ne don cire sanyi Layer da hannu a saman da evaporator sallama tube. Ana iya aiwatar da wannan hanyar ba tare da dakatar da kayan aikin firiji ba. Wannan hanyar tana ɗaukar lokaci kuma mai wahala, kuma tasirin defrosting ba shi da kyau.
2. Lantarki defrosting shi ne shigar da wutar lantarki a kan evaporator don defrost da lantarki dumama. A lokacin daskarewa, dakatar da kwampreso ko kuma dakatar da ciyar da ruwa zuwa ga evaporator. Lantarki defrosting yana da abũbuwan amfãni daga low cost da sauki sarrafawa, amma aiki kudin ne high. Gabaɗaya ana amfani da su don shafe kayan ajiyar sanyi, ba don narke kayan sanyi ba. Don yanayin zafi daban-daban, abubuwan da ake buƙata don ƙwarewar rufi dole ne su bambanta, kuma ƙarfin sanyaya da ake buƙata shima dole ne ya bambanta. Ƙaddamar da ajiyar sanyi yana buƙatar daidaitawa bisa ga ainihin yanayin aikace-aikacen abokin ciniki da aikace-aikacen, sai dai idan babu buƙatar musamman don ɗaukar hanyar daidaitawa.
3. Defrosting gas mai zafi shine yin amfani da tururi mai zafi mai sanyi wanda injin compressor ya saki don sakin zafi a cikin injin da kuma narkar da dusar ƙanƙara a saman mashin. Tsarin kashe gas mai zafi yana da rikitarwa kuma farashi yana da yawa. Amma tasirin defrosting ya fi kyau. Lokacin amfani da ammoniya tsarin, man da aka tara a cikin evaporator kuma za a iya fitarwa a cikin magudana ko ƙananan matsa lamba tafki. A cikin aiwatar da iskar gas mai zafi, ana sarrafa matsa lamba gabaɗaya a 0.6MPa. Yi ƙoƙarin yin amfani da iskar gas mai ƙarfi da ake fitarwa daga kwampreso mataki ɗaya don shafe kusoshi. Lokacin hunturu na iya zama dacewa don rage yawan ruwan sanyi ko rage yawan masu sanyaya, ƙara yawan zafin jiki, rage lokacin rage sanyi. Don tsarin ammonia, ammoniya mai zafi don defrosting ya kamata a haɗa shi da bututun mai na mai raba.
4. Ruwan daskarewa shine a fesa ruwa a saman mai fitar da ruwa tare da na'urar sprinkler don narke dusar ƙanƙara. Tsarin lalata ruwa yana da tsari mai rikitarwa da tsada mai tsada, amma sakamako mai kyau da ƙarancin farashi. Defrosting ruwa iya kawai cire sanyi Layer a kan m surface na evaporator, kuma ba zai iya warware mummunan sakamako na mai tara a cikin evaporator a kan zafi canja wuri. Abu mafi mahimmanci shine allon ajiya mai sanyi, wanda yawanci ana samarwa a gaba ta hanyar masana'antar ajiyar sanyi kuma yana da tsayayyen tsayi, faɗi da kauri. Ana amfani da allo mai kauri mai kauri 100mm don ma'ajiyar sanyi mai tsayi da matsakaici, 120mm ko 150mm kauri allon ajiyar sanyi yawanci ana amfani da shi don ƙananan zafin jiki da ajiya mai daskarewa.
5. Ruwan ruwan zafi mai zafi shine hanyoyin da ake amfani da su na zafi mai zafi da kuma zubar da ruwa da aka yi amfani da su a lokaci guda, wanda ke mayar da hankali ga fa'idodin duka biyun, kuma zai iya sauri da kuma yadda ya kamata cire sanyi Layer a farfajiyar evaporator kuma ya kawar da tarawar mai. cikin evaporator. Lokacin da zazzagewa, ana fara aika iskar mai zafi a cikin mashin don raba dusar ƙanƙara daga saman mashin ɗin, sannan a fesa ruwan don a wanke sanyin da sauri. Bayan da aka yanke ruwa, ana "bushe" sararin samaniya ta hanyar iska mai zafi don hana fim din ruwa daga daskarewa kuma ya shafi canjin zafi. A da, masana'antun allon sanyi sun fi amfani da polyethylene da polystyrene a matsayin kayan aiki. Yanzu akwai mafi kyawun aikin katako na sandwich polyurethane. Polystyrene kumfa rufin abu mai yawa yana da ƙasa, ba za a iya rufe shi ba. Yawancin lokaci ana amfani da su a cikin kayan aiki na musamman. Polyethylene ne mai kyau albarkatun kasa. Ta hanyar ƙayyadaddun rabo, za a iya fitar da kumfa daga madaidaicin maɗaukaki, tasiri mai mahimmanci yana da kyau, ƙarfin ɗaukar nauyin kayan aiki. Farantin polyurethane ya fi kyau, yana da aikin rufewa mafi kyau kuma baya sha danshi, amma wannan farashin ajiyar sanyi ya ɗan fi girma.
Lokacin aikawa: Dec-08-2023