Fault phenomenon: fan motor overload， fan deformation; Fan motor fault; Fan motor thermal relay fault (aging); Loose wiring; Cooler blocked; Large exhaust resistance. Cold storage fault phenomenon: dryer does not operate， compressor line is disconnected， fuse is blown， thermal relay acts high voltage switch acts， compressor is locked， line is falsely connected or loose fault phenomenon: it stops in a short time after drying， ambient temperature is too high， condenser is blocked
HassertThere are several types of insulation materials. One is to produce and process plates with fixed shape and specification， total width and thickness. Plates of corresponding specifications and models can be selected according to the installation of the refrigerator body. High and medium temperature refrigerators generally use cm thick refrigerator plates， and ultra-low temperature refrigerators and freeze-cleaning refrigerators generally use cm or cm thick refrigerator plates; Another kind of sprayed polyurethane foam can be sprayed immediately into the finished brick or concrete warehouse. After forming， etc. polyurethane is non hygroscopic and has good fire resistance polystyrene grease，HassertCold storage installation scheme， but the cost is high; Polystyrene resin has strong water absorption and poor fire resistance， but the cost is low. The structure of modern cold storage is developing in the direction of dress matching architecture. They are made into prefabricated components including steam barriers and heat shields to ensure field assembly. Its advantage is that the project construction is convenient， fast and movable， but the project cost is relatively high.
Emergency measures during the use of the medical cold storage project， it may also encounter power failure or power failure. In fact， most medical cold storage projects will be equipped with emergency equipment， so that the medical cold storage project can achieve the effect of normal power supply. Once the automatic temperature or humidity monitoring system is abnormal， the cold storage door should be closed in time， So as not to expose more air conditioners， resulting in corresponding problems in the quality of stored products. The medical cold storage project also has a self rescue system in time. If the temperature of the cold storage exceeds the limit， the system cooling system will also be turned on. When the temperature returns to normal， it will be automatically turned off.
Southampton. Maintenance of food cold storage. In a position convenient for operation outside the door of the refrigerator room， a main switch for cutting off the power supply of the refrigeration compressor shall be set. This switch shall be able to stop the operation of the refrigeration compressor， and relevant signs shall be set. If the mechanical panel is set in the main room， a button switch shall be added next to each refrigeration compressor.
The common phenomenon of quick freezing storehouse is that the temperature of quick freezing storehouse can"t drop down or drops slowly. Now， a simple analysis is made on the reasons for the slow drop of temperature: the cold capacity loss of quick freezing storehouse is large due to poor thermal insulation or sealing performance; the poor thermal insulation performance is due to insufficient thickness of thermal insulation layer of pipeline and warehouse thermal insulation wall， resulting in poor thermal insulation and thermal insulation effect， It is mainly caused by improper selection of insulation layer thickness in design or poor quality of insulation materials in construction.
The equipment configuration is reasonable and the service life of the quick freezing warehouse is long. The reasonable equipment configuration of the quick freezing warehouse can greatly prolong the service time of the quick freezing warehouse. Some compressors are easy to be damaged when they work at full load for a long time so we try to use screw parallel units. The great advantage of this unit is that it can turn on all equipment， just like the shift at work， so that the compressor can work and rest in turn.
Step of cold storage design: selection and laying of cold storage thermal insulation materials. The use of cold storage thermal insulation materials must be adjusted to the time， which not only has excellent fire resistance， but also has high cost performance. There are several types of cold storage insulation materials. One is the plate produced and processed into a fixed shape and specification， with fixed length total width and thickness. The cold storage plate with relative specification and model can be selected according to the installation of the warehouse body. The high and medium temperature cold storage generally adopts cm thick cold storage plate， cm or cm thick cold storage board is generally used for ultra-low temperature cold storage and freeze-cleaning cold storage; Another kind of cold storage can be sprayed with polyurethane spray paint and polyurethane foam， it is both waterproof and thermal insulation. Thermal insulation materials include polyurethane， polystyrene grease， etc. Polyurethane is non hygroscopic and has good fire resistance， but the cost is high; Polystyrene resin has strong water absorption capacity and weak fire resistance，HassertCold storage construction and production， but the cost is low.
After the installation of the controlled atmosphere storage， the temperature is too low， perhaps because the unit is too large， which leads to the rapid decline of the air temperature in the controlled atmosphere storage. However， it can be found that the temperature of the goods is still at a high level， or perhaps because the thermal insulation effect of the controlled atmosphere storage is relatively poor after the installation of the controlled atmosphere storage， then the heat dissipation will be accelerated， from centrifugal humidification to high-pressure micro fog humidification we must pay attention to its thickness. Only the modified atmosphere storage board with the required thickness can have a certain thermal insulation effect.
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.
property rightRelative humidity maintenance of quick-frozen warehouse: humidification of quick-frozen warehouse is very important， gas-water mixed humidification， to the current ultrasonic humidifier. The utility model has the advantages of small particles， uniform humidification， no freezing and blocking， and no dirty blocking. The air conditioning humidifier we produce is specially designed for all kinds of vegetable and fruit quick freezing warehouses， which is essentially different from other humidifiers in the market: fully closed circulation， that is， take the gas in the warehouse， return to the warehouse through the humidifier and isolate it from the outside air.
The new cold storage material is made of rigid polyurethane or polystyrene foam insulation sandwich panel， which is made by high pressure foaming process and can be made into various lengths and specifications to meet the different requirements of the users.
However， long-term continuous operation will inevitably lead to equipment aging， so reasonable maintenance is particularly important.
During the use of cold storage，HassertInstallation price of small cold storage， attention shall be paid to the collision and scratch of the storage body to avoid the depression and corrosion of the storage plate， which will seriously reduce the local thermal insulation performance of the storage body.
Click to viewThe ground insulation of small， medium and large cold storage is different， which is closely related to the purpose， storage products and size of cold storage. Kuhua refrigeration reminds: ground insulation must be done， otherwise the temperature in the cold storage often fluctuates frequently due to poor insulation performance， which affects the quality of stored goods. So， what is the difference between the ground insulation of small， medium and large cold storage? How to do better?
Frosting of evaporator will increase thermal resistance and decrease heat transfer coefficient. For the cooling fan， the air circulation cross-sectional area is reduced， the circulation resistance is increased， and the power consumption is increased. Therefore， defrost in time. Pay attention to the maintenance of the evaporator of the controlled atmosphere storage system. If the evaporator frosts， it will affect the normal use of the controlled atmosphere storage. How to defrost in time? The current scheme of the controlled atmosphere storage includes: manual defrosting， which is simple and easy， and has little impact on the storage temperature
Cold storage plate features: good thermal insulation performance， light weight， high strength， corrosion resistance， anti-aging， beautiful appearance.
HassertRequirements for refrigeration equipment in quick freezing warehouse: the strict sealing of quick freezing warehouse is obviously different from that of ordinary quick freezing warehouse. Therefore， all through wall pipelines must be equipped with sleeves， the frost flushing water return pipeline must be equipped with U-shaped bend water seal， and the main frost flushing and return pipeline outside the warehouse shall be equipped with air filling port to prevent the gas in the warehouse from being pumped out of the warehouse by negative pressure. In addition， due to the good sealing of the quick freezing warehouse， the set fluctuation range of the warehouse temperature should not be too large to prevent excessive positive and negative pressure from damaging the warehouse body.
Cold storage design segmentation: several different partitions shall be reasonably planned and divided according to purpose and temperature. For example: processing room， sorting room， quick freezing room， refrigeration room， channel， unloading platform， etc.
During the cold storage commissioning， special personnel shall be assigned to ensure that the surface of the cold storage plate shall reflect evenly without condensation and cold running; Sealing conditions of joints and holes; Whether the warehouse door and delivery port are not tightly sealed， and timely deal with the problems of insulation and seal failure such as degumming and air leakage.