The reason why a refrigerated truck is called a refrigerated truck is that its carriage has a cooling function to keep the goods fresh and not deteriorate during the transportation of cold chain logistics. It is relying on this cooling principle that a refrigerated truck can be in the cold chain industry. Reaching out and playing a huge role has attracted more and more people's attention. So what is the working principle of this refrigeration? The first method is water ice and salt ice refrigeration: the water ice refrigeration device has less investment and low cost, but it also has the disadvantage that the ordinary water has less heat absorption, while the refrigerated car itself has limited cooling. The melting of salt ice also pollutes the environment, and food and vehicle compartments are subject to dampness and corrosion. In this respect, water ice refrigeration is mainly used for the refrigerated transport of fish and fishery products. The second method is dry ice cooling: the dry ice device is simple, the investment and maintenance costs are also very low, and the operation is simple and the cargo does not get wet. However, sublimation of dry ice can easily cause frost, resulting in fruit and vegetables that are prone to spoilage. The temperature in the compartment is difficult to adjust, and the cost of dry ice is high and the consumption is large. Therefore, the actual use is less. The third method is cold plate cooling: this type of refrigeration itself occupies a large area, and the cold plate charge lasts only about 10 hours. Therefore, cold plate cooling is only suitable for medium and short-distance transport of neutral and light refrigerated trucks. In the past few years, cold chain logistics has become the second only to mechanical refrigeration, and the price of refrigerated trucks is constantly changing. The fourth method is liquid nitrogen refrigeration. The device is also extremely simple, reliable and safe to work, no noise and pollution; however, the liquid nitrogen has a large amount of refrigeration and the refrigeration is very fast, which is more suitable for quick freezing. Liquid nitrogen is beneficial to the preservation of food, but the comprehensive cost of liquid nitrogen is high, and it requires constant charging, so the promotion is subject to certain restrictions. Refrigerated trucks play a central role in cold chain logistics, mainly serving to ensure food safety and safeguard the quality of fresh foods. Refrigerated truck is a key equipment in an important part of low-temperature cold chain logistics. A refrigerated truck with good refrigeration equipment is the key to ensure the safety of perishable and fresh foods in the transportation process.
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September 20, 2019