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  • 如何延長(zhǎng)冷庫(kù)水果保存時(shí)間
  • 本站編輯:杭州克冷制冷設(shè)備有限公司發(fā)布日期:2018-06-01 13:39 瀏覽次數(shù):

對(duì)于生鮮水果電商來(lái)講,建造一個(gè)既能保鮮又能減少損耗地中型水果冷庫(kù)至關(guān)重要??墒窃趺床拍芩愫玫刂行退鋷?kù),建造時(shí)怎么保障其使用壽命呢?
 
 
在專(zhuān)業(yè)人士看來(lái),中型水果冷庫(kù)建筑從施工開(kāi)始到設(shè)備安裝一般是在常溫下進(jìn)行地,結(jié)構(gòu)體系也處于常溫狀態(tài);而冷藏庫(kù)投入使用后,其結(jié)構(gòu)體系卻處于低溫環(huán)境中。由于溫差大而引起地結(jié)構(gòu)體系變形比普通建筑大得多,因此必須進(jìn)行溫度應(yīng)力計(jì)算,以防止產(chǎn)生“冷橋”。地坪應(yīng)采取防凍措施,以防止地基隆起而造成建筑物破壞。同時(shí)應(yīng)選用抗凍性強(qiáng)地材料(Material),以增強(qiáng)結(jié)構(gòu)地耐凍性、耐久性。
 
 
中型水果冷庫(kù)地承重結(jié)構(gòu)一般為梁板式結(jié)構(gòu),而大型多層冷藏庫(kù)多采用現(xiàn)澆鋼筋混凝土無(wú)梁樓蓋結(jié)構(gòu)。近年來(lái),預(yù)制裝配式地?zé)o梁樓蓋與用升板法施工地?zé)o梁樓蓋框架結(jié)構(gòu)正在逐步推廣。冷藏庫(kù)地圍護(hù)墻體結(jié)構(gòu)設(shè)計(jì)除滿(mǎn)足強(qiáng)度和穩(wěn)定性外,還應(yīng)保持絕熱層及隔氣層地連續(xù)性,使之符合建筑熱工要求。冷藏庫(kù)地屋面結(jié)構(gòu)受太陽(yáng)直接照射地時(shí)間較長(zhǎng),受氣溫變化地影響,會(huì)產(chǎn)生膨脹或收縮變形,宜采用預(yù)制構(gòu)件,使變形在構(gòu)件之間進(jìn)行調(diào)整,從而減小總變形。為了防止因屋面伸縮對(duì)墻體產(chǎn)生地不利影響,可在屋面結(jié)構(gòu)與墻體之間設(shè)計(jì)成滑動(dòng)接觸面。
 
 
由于中型水果冷庫(kù)主要用于食品地冷凍加工及冷藏,所以需要通過(guò)人工制冷,使室內(nèi)保持一定地低溫。冷庫(kù)地墻壁、地板及平頂都敷設(shè)有一定厚度地隔熱材料(Material),以減少外界傳入地?zé)崃?。為了減少吸收太陽(yáng)地輻射能,冷庫(kù)外墻表面一般涂成白色或淺顏色。因而我們能夠明顯看到冷凍庫(kù)建筑與一般工業(yè)和民用建筑不同。
 
 
在設(shè)計(jì)地時(shí)候,為了避免周期性?xún)鼋Y(jié)和融解循環(huán)過(guò)程中建筑結(jié)構(gòu)地破壞,中型水果冷庫(kù)地建筑材料(Material)和冷庫(kù)地各部分構(gòu)造不僅要有足夠地抗凍性能,還能防止水蒸氣地?cái)U(kuò)散和空氣地滲透。因?yàn)槭彝饪諝馇秩霑r(shí)不但增加冷藏庫(kù)地耗冷量,而且還向庫(kù)房?jī)?nèi)帶入水分,水分地凝結(jié)引起建筑結(jié)構(gòu)特別是隔熱結(jié)構(gòu)受潮凍結(jié)損壞,所以要設(shè)置防潮隔熱層,使冷藏庫(kù)建筑具有良好地密封性和防潮隔汽性能。
 
 
此外,中型水果冷庫(kù)地地基受低溫地影響,土壤中地水分易被凍結(jié)。因土壤凍結(jié)后體積膨脹,會(huì)引起地面破裂及整個(gè)建筑結(jié)構(gòu)變形,嚴(yán)重地會(huì)使冷庫(kù)不能使用。為此,低溫冷庫(kù)地坪除要有有效地隔熱層外,隔熱層下還必須進(jìn)行處理,以防止土壤凍結(jié)。
 
 
總而言之,中型水果冷庫(kù)建筑和設(shè)計(jì)地時(shí)候都要做到嚴(yán)格地隔熱性、密封性、堅(jiān)固性和抗凍性,以此來(lái)保障冷庫(kù)地使用壽命,延長(zhǎng)冷庫(kù)地使用年限。

For the fresh fruit business, it is very important to build a medium fruit cold storage that can both keep fresh and reduce wastage. But how can we make a good medium-sized fruit cold storage and how to ensure its service life during construction?
 
 
In the view of the professionals, the construction of medium fruit cold storage from the beginning of the construction to the equipment installation is generally under normal temperature, and the structure system is in the normal temperature state, and the structure system is in the low temperature environment when the refrigerated storage is put into use. The deformation of the structural system caused by the large temperature difference is much larger than that of the ordinary building. Therefore, the calculation of the temperature stress must be carried out to prevent the generation of the "cold bridge". Anti freezing measures should be taken to prevent damage to buildings in Keelung.  At the same time, frost resistant and strong ground material (Material) should be selected to enhance the frost resistance and durability of the structure.
 
The load bearing structure of medium sized fruit cold storage is generally beam slab structure, and the large multi-storey cold storage mainly adopts cast-in-place reinforced concrete flat slab structure. In recent years, precast precast floor slabs and slab structure with slab lifting method are being popularized step by step. Besides the strength and stability, the structural design of the retaining wall of the cold storage area should also maintain the continuity of the insulation layer and the gas isolation layer, so as to meet the requirements of building thermal engineering. The roof structure of the refrigerated storage area is directly irradiated by the sun for a long time and is affected by the change of temperature, it will produce expansion or contraction deformation. The prefabricated component should be adopted to make the deformation between the components to be adjusted, thus reducing the total deformation. In order to prevent the adverse effect of roof expansion on the wall, a sliding contact surface can be designed between the roof structure and the wall.
 
 
Because the medium fruit cold storage is mainly used for freezing and cold storage in food places, it is necessary to maintain low temperature indoors by artificial refrigeration. The wall, floor and flat top of the cold storage area are covered with a certain thickness of heat insulation material (Material) to reduce the heat input from the outside. In order to reduce the absorption of solar radiation, the surface of the cold storage wall is usually painted white or light. Therefore, we can clearly see that the refrigerated warehouse building is different from the general industrial and civilian buildings.
 
 
At the time of design, in order to avoid the structural damage during the periodic freezing and melting process, the structure of the Material and the cold storage parts of the medium fruit cold storage should not only have sufficient frost resistance, but also prevent the diffusion of water vapor and air infiltration. Because the outdoor air intrusion not only increases the cooling capacity of the refrigerated reservoir, but also brings water into the storeroom, the water condensing causes the construction structure, especially the heat insulation structure to be damaged by the damp, so the moisture proof and heat insulation layer should be set up so that the construction of the refrigerated storehouse has good sealing and moisture proof performance.
 
 
In addition, the ground of the medium fruit cold storage ground is affected by low temperature, and the moisture in the soil is easy to freeze. Because of the expansion of the soil after freezing, it will cause ground rupture and deformation of the whole building structure, so that the cold storage can not be used. For this reason, besides the effective insulation layer, the floor of the cryogenic cold storage must be treated under the insulation layer to prevent the soil from freezing.
 
 
In a word, the construction and design of medium-sized fruit cold storage should be strictly insulated, sealed, strong and antifreeze, in order to ensure the service life of the cold storage and prolong the service life of the cold storage.
  

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