Supply of cold medicine in Dongguan

Second, the classification of cold medicine in Dongguan 
 (A) of sub-scale cold storage capacity 
 Currently, the frozen storage capacity has not unified division, is generally divided into large, medium and small. Large pharmaceutical cold storage refrigeration capacity of 10000t above; medium-sized pharmaceutical cold store refrigeration capacity of 1000 ~ 10000t; small pharmaceutical cold store refrigeration capacity 1000t or less. 
 (B) the design temperature of cold sub- 
 Divided into high-temperature, medium temperature, low temperature and ultra-low temperature freezer four categories. ① general design of high temperature and cold storage temperature of -2 ℃ refrigerator to +8 ℃; ② design in cold temperature cold storage temperature -10 ℃ to -23 ℃; ③ low temperature, the temperature is generally -23 ℃ to 30 ℃; ④ Low freezing temperature is generally -30 ℃ library to -80 ℃. 
 (C) of the database structure by category 
 1. Civil Dongguan cold medicine 
 This is the construction of a large freezer, you can build single or multiple. Is generally the main building of reinforced concrete frame structure or masonry structure. Cold storage building envelope is a civil engineering body structure weight, thermal inertia of large, outdoor air temperature and diurnal fluctuations in the outer surface of envelope caused by solar radiation day and night temperature fluctuations, a larger attenuation in the envelope, so the envelope temperature fluctuations on the inner surface of small, easy storage temperature will stabilize. 
 2. Combination of cold medicine, Dongguan plate 
 The single-layer form of cold storage, the library board for the light steel frame prefabricated insulation assembly structure, the bearing members to use more thin-type steel production. Library board of the inner and outer panels are color steel plate (substrate for the galvanized steel sheet), the library board's core material is rigid polyurethane foam polystyrene foam or paste. In addition to the ground because, all components are factory according to uniform standards of professional pre-sets, on-site assembly, construction progress so fast, short construction period. 
 3. Overburden Dongguan Cold Medicine 
 It is also known as cold medicine earth cave, cave mostly arch, a single hole style, but also form a continuous arch. Usually brick masonry, and to a certain thickness of the loess cover as insulation. Temperature of the casing as a cold storage cave should be based on hard frost in the gravel layer, or bedrock. Because of its local conditions, local materials, simple construction, low cost, durable, etc., in Northwest China have greater development. 
 4. Cave Dongguan Cold Medicine 
 More general construction in stone hard, overall a good rock, the cave or the inside lining of the general spray anchor for treatment, caverns of rock cover thickness of not less than 20m