What should be considered in building a cold storage? In these aspects， food cold storage is a systematic project of artificial refrigeration to ensure food quality and reduce food decay in a low-temperature environment. Refrigeration technology affects the design of food cold storage， meets the needs of refrigeration technology， convenient production， energy saving and cost reduction. What problems should be considered in the construction of food cold storage?
The installation of top warehouse plate should be carried out alternately with the installation of wall plate and the wall plate should leave a gap for withdrawing construction equipment; During the installation of the top warehouse plate， the end steel sheet at the overlap with the wall plate shall be disconnected for mm to prevent the cold bridge from running cold; Two layers of foaming materials shall be evenly and continuously punched on the joint surface between each top warehouse plate. Rivets shall be pulled and fixed at the internal and external lap joints of the steel plate， and the rivet spacing shall be mm; According to the design drawings， if there are supporting beams， columns and supporting steel frames in the warehouse， support steel frame column etc.， and the welded junction shall be moisture-proof and treated according to the drawing requirements.
serumIf the controlled atmosphere storage is not used for a long time， does it also require refrigeration? If the controlled atmosphere storage is not used for a long time after installation， there may be fluorine leakage due to long-term non use，serumInstallation of fruit and vegetable fresh-keeping warehouse， so refrigeration operation should be carried out at this time.
The polyurethane insulation board used in the construction of cold storage shall be integral and continuous， and there shall be no joint in the middle. The junction of polyurethane insulation board， top plate and ground shall be made into fillet arc for transition， which can well meet the health needs.
ZamoshikStrong deformation resistance， not easy to crack， smooth， stable and safe. Polyurethane material has stable porosity structure and basically closed pore structure. It not only has excellent thermal insulation performance， but also has good freeze-thaw resistance and sound absorption performance. Under normal service and maintenance conditions， the life expectancy of rigid foam polyurethane insulation can reach more than years. During the structural life period， it can reach the unit price of dry， while the unit price of insect fungus or algae foam material is higher than other traditional insulation materials， but heating will increase the cost and the cooling cost will be greatly reduced.
The two sets of connectors between the cold storage shall be wedged tightly， and the two sets of connectors shall be fixed at the upper， outer and lower sides of the cracks in the cold storage respectively. The lower connector shall be as close as possible， so as to facilitate the use of concrete to cover the connector in the future.
Technical assurance measures for the installation of cold storage: during production in the production workshop， the production shall be carried out in strict accordance with the operation rules specified in ISO quality operation， self inspection and inspection application shall be carried out to ensure that the factory pass rate is， and unqualified products are not allowed to leave the factory.
Polyurethane foam: This is also a very common cold storage material. It has strong thermal insulation effect and strong mechanical strength. Now it is widely used and has a good application prospect.
After the fresh-keeping storehouse is built， it is also important to pay special attention to the maintenance of fresh-keeping storehouse equipment in the whole process of application. Here are some key maintenance matters.
Cold storage has good water tightness. Polyurethane rigid foam has low water absorption， good permeability to water vapor， foam holes， disconnected and closed porosity of more than %. It is a dense microporous foam material， which is more dense than air surface， and is not easy to permeate. It belongs to hydrophobic materials.
Credit guaranteeFor cold storage， it is very common in our production and life. Cold storage is very important for food freezing and preservation， but its energy consumption is very large in the use of cold storage. How can we solve this problem?
When installing polyurethane insulation board ensure that its surface is smooth and flat without scratch and warpage.
The service life of polyurethane cold storage insulation material foam is: besides the basic performance of the initial stage of polyurethane foam， the deterioration of foam performance is also a very important index. When the white material is prepared， the surface of some polyester materials can make the foam have better toughness and impact resistance， but it will become brittle after use for a long time in the cold storage， and will no longer resist impact and collision. In addition，serumPharmaceutical refrigeration and cold storage company， the poor hydrolysis resistance of some polyester foam will also affect the service life of the foam. It adopts polyether structure， but generally disappears after a few days， and then maintains the stable performance of cold storage insulation materials for a long time.
The equipment that needs to be installed in the warehouse and put into the warehouse shall be installed in place or placed in an appropriate position in the warehouse; The wall warehouse board shall be installed from the corner of the warehouse body， and the professional cold warehouse shall be installed. The cold warehouse shall be installed. The cold warehouse shall be constructed. The fruit fresh-keeping cold warehouse and medical cold warehouse shall have high pressure rating， good waterproof performance， fire and high temperature resistance， strong overload capacity， radiation protection and long service life. The corner shall be temporarily fixed with . color plate angle steel; When installing each wall panel， evenly apply two layers of foaming material on the joint surface of male and female groove， and apply one layer of foaming material when installing polystyrene wall panel. The blanking shall be uniform and continuous; After the wallboard is installed in place， pull rivets at the lap joint of the internal and external steel plates of the two wallboards for connection and fixation， and the rivet spacing in the warehouse should be mm; When connecting the library plate in the form of eccentric hook connection， the eccentric hook shall be loosened once before installation to ensure reliable locking during installation.
Standard requirementsGeneral quick-frozen warehouses are mostly cooled by refrigeration mechanism with low gasification temperature (ammonia or Freon)
Tips for fresh-keeping storehouse wholesale: the specific functional characteristics of the seafood machine in the fresh-keeping storehouse wholesale are simple to operate， and the microcomputer system is adopted， and the temperature can be adjusted at will; The seafood machine unit has compact structure and stable performance. Users only need to connect the power supply and the cooling water pipeline to put it into operation; The wholesale seafood machine condenser in the fresh-keeping warehouse adopts internally threaded copper pipe. Good heat exchange effect; The seafood machine adopts pure titanium tube evaporator， which has good cooling effect and strong performance; The seafood machine unit wholesale in the fresh-keeping warehouse has extraordinary pressure sealing test， and the performance of each component is particularly good; The seafood machine unit has the advantages of low noise， low vibration， fast cooling， long service life， multiple quality protection devices， high cost performance and good quality. The seafood machine can be customized according to customer requirements; Many fruit wholesalers will transform the original warehouse into a fruit preservation warehouse in order to store fruits for a longer time. Due to the huge difference between warehouses， it needs a lot of attention to transform the warehouse into a qualified energy-saving fruit preservation warehouse.
In order to ensure the safety of construction and cold storage operation， the span between the top storage plate supports (lifting points) shall comply with the following provisions: the polystyrene top storage plate (mm thick) has a very large span of M， and the polyurethane top storage plate (mm thick) has a span of m.
serumIf there is more air or refrigerant oil in the evaporator， the heat transfer effect will be reduced: once more refrigerant oil is attached to the inner surface of the evaporator heat transfer tube， the heat transfer coefficient will be reduced. Similarly， if there is more air in the heat transfer tube， the heat exchange area of the evaporator will be reduced， the heat transfer efficiency will be significantly reduced， and the decline rate of warehouse temperature will be slowed down.
Disadvantages of single-layer cold storage: large; The surface area of the external enclosure structure of the cold storage is large， so the amount of thermal insulation materials is large， and the dry consumption of cold food is also large; For the low-temperature warehouse，serumHow much is the installation price of cold storage? One square meter， the floor anti freezing treatment requires a large amount of work. When the cold storage is built at the water level， it is impossible to deal with it， which is easy to cause horizontal freezing and swelling.
The bacterial action of acid disinfectants is mainly to coagulate the protein in the bacteria. Common disinfectants include lactic acid， bleach， formalin， etc. Specifically， after the fish comes out of the freezer， clean the frost layer on the evaporating pipe group and keep the storehouse temperature below degrees Celsius. Then， according to the volume of ~ grams per cubic meter volume of the frozen storeroom， the storeroom door is closed tightly with the sprayer， and the blower is started intermittently， so that the vinegar evaporates and flows in the storehouse， which makes the vinegar absorb a lot of fish smell.