The refrigeration equipment of refrigerated trucks is mainly composed of refrigerants and four major parts (including compressors, condensers, expansion valves, and evaporators), while the refrigerants are mainly composed of Freon 12, Freon 22, R410A, etc. A wide variety of refrigerants. The main principle of refrigeration is to use the role of the compressor to lower the pressure of the steam pressure through its own compression and replace it with a higher pressure steam. The volume of the steam reduces the pressure. The compressor then raises the vapor pressure of the aspirated low-pressure working fluid and sends it to the condenser, condenses in the condenser to a liquid with higher pressure, and then throttles through the throttle valve to become a low-pressure liquid and sends it to evaporation. The evaporator then absorbs heat in the evaporator to evaporate into lower pressure steam and is sent to the inlet of the compressor to circulate the refrigeration. The power of circulating refrigeration is provided by the compressor, so the compressor is critical to the refrigeration of a refrigerated truck . The role of the compressor is to provide power for the refrigeration cycle. The motor constantly rotates to drag it. It not only extracts the steam in the evaporator to maintain the low temperature and low pressure in time, but also can compress the vapor into a liquid to increase the refrigerant vapor through the action of compression. The pressure and temperature provide conditions for the transfer of heat from the refrigerant vapor to the ambient media. The function of the condensing machine is as a heat exchange device, using ambient cooling media, and then taking away the heat of the high-temperature and high-pressure refrigeration steam from the cold compressor, cooling and condensing the steam of the high-temperature and high-pressure refrigerant into a high-pressure normal-temperature refrigeration liquid. . The role of the expansion valve is a pressure-relief device. The high-temperature and normal-pressure refrigerant liquid is used to depressurize, thereby obtaining a low-temperature and low-pressure refrigerant, which is then sent to an evaporator to absorb heat and evaporate. The evaporator is also a heat exchange device. After the throttling, the evaporator of low-temperature and low-pressure refrigerant vaporizes and turns into steam, which absorbs the heat of the cooled material, thus playing the role of cooling to achieve the purpose of freezing and refrigerating. Above introduces the basic principles of refrigeration refrigerator cars in several parts, in fact, cooling principle refrigerated trucks is composed closely with a number of devices to complete, each tiny links are closely related to the cooling effect, we also need to Refrigerated trucks have enough understanding to understand. It adopts electric cutting way, will be in A3, A4 typesetting good name card paper, placed in the machine entrance, set the crop size, press the switch, the machine will automatically be sent to a name card paper inside the machine, the machine according to the internal knife group of different sizes, can be cut into postcards, name card name card, card and personal card. The chekanovskogo machine has the advantages of high accuracy, cutting speed, long service time etc.. Card Slitting Machine,Card Perforating Machine,Card Creasing Machine,Manual Card Die Cutter Anhui Innovo Bochen Machinery Manufacturing Co., Ltd. , https://www.innovomachines.com