Direct cooling cold storage meaning: the cooling tube of the evaporator of the cold storage is fixed directly on the storage plate, when the evaporator absorbs heat, the closer the cooling tube of the air cooling faster, thus forming a natural convection in the cold storage, gradually realize the overall cooling, that is, direct cooling, such as the common iron row tube, aluminum row tube, etc.
Air-cooled cold storage means: the cold air generated by the evaporator of the cold storage, through the fan to force the circulation of cold air flow, so that the cold air is evenly distributed in each room of the cold storage, to achieve cooling, that is, the use of fans to circulate the flow of cold air cooling method.
The advantages of direct-cooled cold storage:
First, the structure of the direct-cooled cold storage is simple, the failure rate is relatively low, and the low cost leads to low prices.
Second, the cooling effect is good, relatively speaking, more energy-saving and power-saving.
Third, the closed space natural convection, air humidity, food moisture is not easy to lose.
Fourth, the temperature evaporates slowly, if the unit fails for a short time, the library can maintain the original temperature for a short period of time, the impact on the goods is small.
Disadvantages of direct-cooled cold storage:
First, the frost problem leads to the user needs to manually defrost, time-consuming and unpopular.
Second, the frost problem will seriously affect the evaporator heat absorption refrigeration, refrigeration efficiency will be significantly reduced.
Third, the natural convection makes the cold storage cold distribution is not uniform, the existence of frozen dead space in the cold storage, food is not the same degree of freezing, poor refrigeration effect.
Fourth, the refrigeration is slightly slower, because according to the characteristics of the pipe, the cooling speed is slightly slower – some.
Fifth, the humidity of the air is larger, easy to cause the freezer food sticking frozen in one piece, not easy to separate.
The advantages of air-cooled cold storage:
A, air-cooled cold storage basically will not be in the refrigerator wall frost, avoid the user manual defrost trouble, the user saves heart and effort, so and get many consumers welcome.
Second, by the fan to force the circulation of cold air flow, the cooling speed of the cold storage faster, more balanced distribution of cold air.
Third, refrigeration fast, the chiller can quickly refrigeration, so that the library quickly reach the temperature of the goods demand.
Fourth, the relative straight cooling aluminum row price is cheap.
Disadvantages of air-cooled cold storage:
First, the complex structure of air-cooled cold storage causes a relatively high failure rate, and the cost increases.
Second, in order to achieve the circulation of cold air flow, the fan workload is larger, while automatic defrost will also increase energy consumption, so power consumption is larger.
Third, the running cold freezes quickly, and if there is a short-term failure of the unit, or if the insulation material is not selected reasonably, the running cold is faster. So the time for after-sales maintenance personnel to come to the door should have certain requirements.
Fourth, the food in the library is easy to dry consumption, for no packaging, or the wind goods are easy to be blown dry and lose moisture.
Post time: Jun-05-2023