A kind of refrigerated truck and its refrigeration system

Abstract

The invention discloses a refrigerator car and a refrigeration system thereof. The refrigeration system comprises a compressor, an evaporator, a throttling component, condensers, a defrosting pipe and a vapor-liquid separator. The condenser is arranged between a four-way valve and a throttling component, and the condensers comprise the parallel flow type main condenser and the copper pipe fin type auxiliary condenser which are connected in series. The refrigeration system further comprises a second valve connected with the parallel flow type main condenser in parallel. The condensers are arranged to be two parts, namely, the parallel flow type main condenser and the copper pipe fin type auxiliary condenser, connected in series. In a refrigeration mode, the second valve is disconnected and stopped, and refrigerating fluid passes through the two condensers in sequence in the condensation process. In the defrosting process, the second valve is opened and connected, the refrigerating fluid only passes through the copper pipe fin type auxiliary condenser, the frosting problem of the condensers is effectively relieved, the flow of the refrigerating fluid of the system is increased, heating capacity for defrosting is improved, energy is saved, defrosting speed is increased, temperature fluctuation in a compartment of the refrigerator car is reduced, and the preservation quality of a refrigerated object is ensured.

Description

technical field [0001] The invention relates to the technical field of refrigeration, in particular to a refrigerated vehicle, and furthermore, to a refrigerating system of the refrigerated vehicle. Background technique [0002] As the quality requirements for food and medicine continue to increase, it is particularly important to ensure their freshness and safety during transportation. Therefore, refrigerated trucks have emerged as the times require. [0003] At present, when some foods are refrigerated and transported, the temperature inside the refrigerated truck is required to be kept at a very low level (about -18°C). Frosting and icing in the middle will affect the heat transfer efficiency and reduce the cooling capacity and reliability of the refrigerating unit of the refrigerated transport vehicle. Therefore, it should be able to quickly and effectively defrost the refrigerating unit of the refrigerated vehicle. [0004] The defrosting method of the refrigerating un...

AI Technical Summary

Problems solved by technology

When the engine speed increases, the compressor speed increases accordingly, and the high pressure in the system also increases, especially in summer when the high-temperature weather operates, the pressure in the condenser is higher, and long-term operation is easy to cause damage to system components, reducing the Reliability of Refrigeration Units

Images