The most important function of a refrigerated truck is to ensure that the temperature of the goods in the vehicle is not invaded by the external high temperature, and that the equipment for ensuring the low temperature in the vehicle is a refrigeration compressor. The classification of the transport vehicle is also diverse.
The displacement type compressor is totally enclosed, and the refrigeration compressor realizes the processes of suction, compression, and exhaustion by changing the volume of the working chamber. Among such compressors are reciprocating compressors and rotary compressors. Speed ​​compressors rely on high-speed rotating T1 for I1" wheels to do work on steam, the pressure is increased, and the task of conveying steam is completed. There are centrifugal and axial compressors which are commonly used in this type of compressor. Centrifugal type is commonly used. Compressor: It has a wide range of applications, mature manufacturing technology, simple structure, low requirements for processing materials and processing, low cost, strong adaptability, and can adapt to a wide range of pressure and cooling capacity, and has strong maintainability. The compressor is a rotary volume compressor, which uses the change of the slot volume and position of the screw to complete the suction, compression and discharge of the steam.The screw compressor is divided into two types: twin screw and single screw. Screw compressors are often referred to as screw compressors.The variable displacement compressor can automatically adjust the power output according to the set temperature.In the whole process of cooling, the compressor is always working, and the adjustment of refrigeration intensity is completely supported by the equipment. It is controlled by a pressure regulating valve inside the compressor, a fixed displacement refrigeration compressor, which cannot automatically change the power transmission according to the demand of refrigeration, but also to the engine fuel consumption. The influence is relatively large, and its control is usually achieved by collecting the temperature signal of the outlet of the evaporator.The constant displacement compressor is also controlled by the pressure of the air conditioning system. When the pressure in the pipeline is too high, the compressor stops working.
At present, domestic refrigerated trucks use double-compressor dual system design method, which is a set of air-conditioning systems, a set of refrigeration systems. However, the compressor dual system is another new design method: only one compressor, one condenser, two evaporators, and associated equipment are needed.
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