Manual defrosting: The operator holds in his hand the method of removing condensation directly from the surface of the evaporator called manual defrosting. Generally, it is only for the defrosting of the wall row pipe and the top row pipe of the cold storage. The refrigerating room for frozen goods is a refrigerating room for long-term inventory goods. The drain pipe is located at the top of the goods or near the adjacent goods. If the hot flow defrosting or electric heating defrosting is used, the melting of the frost will not only make the goods damp again, but also bind the goods into blocks. The warming of the warehouse temperature will also harm the quality of food storage, so the drainage pipe of the cold storage room is not suitable for the method of "melting" frost defrosting, and the water defrosting is more not allowed.
The characteristic of artificial defrosting is that the frost does not melt. In the defrosting link, the evaporator can still operate normally, which is basically not affected by the constant humidity of the warehouse. Therefore, it is most suitable for the defrosting of the pipe in the cold room of the frozen cleaning. However, when defrosting, the staff want to enter the warehouse for actual operation, and the work nature is weak, and it will increase the staff's heating consumption and cooling capacity and labor cost. Manual defrosting, there is also a labor cost and operation cost balance problem. In view of the different types of goods stored in each refrigerating factory, the outer packing condition is not the same, The defrosting rate of the pipe varies greatly, so the interval of artificial defrosting is only determined according to the actual situation. The scientific and reasonable approach is to conduct a comprehensive analysis of the operating system's increased operating utilities and defrosting labor costs due to the thickness of the frost layer, so as to determine an effective socio-economic defrosting cycle time. The specific analysis idea is that in a scientific and reasonable defrosting period, the additional operating cost accumulated by the heat transfer coefficient of the frost layer is exactly equivalent to the labor cost of the first defrosting.
Defrosting of hot steam parameters: defrosting of hot steam parameters is the use of refrigeration compressor to discharge super-temperature refrigerant steam with strong humidity, through the oil filter, into the evaporator, the evaporator as a temporary cooler, the use of hot I cold need to release heat, the frost layer on the surface of the evaporator. At the same time, the refrigerant and grease originally stored in the evaporator are discharged into the defrosting and liquid discharge barrel or the low voltage circulation system barrel depending on hot charging or applying force. When the heat flow is defrosted, the load of the cooler is reduced, and the operation of the cooler can also reduce part of the electromagnetic energy. Thus rich, hot steam parameter defrosting is the most economic development of industrial air cooler defrosting way.
At present, the drum pump liquid supply system software is only used in various systems due to the improvement of many ancillary equipment and the expansion of ancillary equipment, which makes the input cost rise. The vast majority of medium and small cold storage units in the sales market have the advantage that it is very easy to complete automatic technology control by using air conditioning freon. It is very popular to use the immediately expanding liquid supply and discharge bucket to carry out hot fluorine defrosting.
Basic concept: The refrigeration compressor is used to discharge Freon steam from hot air conditioning, and the industrial air cooler is heated and defrosted. After defrosting, the air conditioner Freon liquid is discharged into and out of the liquid barrel, and then pressure the air conditioner Freon supply into the liquid supply pipe in the liquid barrel to participate in cooling. During defrosting, the direction of outflow flow and refrigeration cycle -.
