DC-driven mobile refrigeration equipment

Abstract

The invention discloses DC-driven mobile refrigeration equipment, which comprises a thermal insulation library body embedded with a refrigeration system and a power supply system. A compressor of the refrigeration system is a DC variable frequency compressor powered by secondary DC voltage; and the power supply system comprises a dual-power DC generator capable of outputting first DC voltage and second DC voltage and a battery which is charged by the second DC voltage. The battery and the dual-power DC generator form two power sources for supplying power to the DC variable frequency compressor; and a power source controller is connected between the battery and the dual-power DC generator and the DC variable frequency compressor. The power source controller at least comprises a power switching module capable of automatically switching the DC variable frequency compressor from dual-power DC generator power supply to battery power supply when a vehicle engine runs at a low rotating speed and automatically switching the DC variable frequency compressor from battery power supply to dual-power DC generator power supply when the vehicle engine runs at the normal rotating speed. The DC-driven mobile refrigeration equipment has the advantages of capacity of refrigerating under the vehicle stop condition, stable refrigerating capacity and high refrigerating accuracy.

Description

technical field [0001] The invention relates to a mobile refrigeration equipment used for transportation, turnover and storage of frozen food. Background technique [0002] With the improvement of people's living conditions, the requirements for the quality and taste of food are becoming higher and higher. The change of temperature and humidity in the storage and transportation of agricultural and sideline products such as fruits and vegetables and meat products directly affects the quality of the products. Therefore, after harvesting or processing, fresh food will be sent to a constant temperature warehouse for storage in a specific environment. [0003] In recent years, the state has gradually increased the monitoring of food safety, and the management of cold storage chains has also been gradually improved. The establishment of food cold chain storage and transportation can not only ensure the taste and nutrition of fresh foods such as fruits and vegetables, but also gre...

AI Technical Summary

Problems solved by technology

The disadvantages are: for non-independent mobile refrigeration equipment, the speed of the compressor will change with the change of the engine speed when the vehicle is running, and the compressor needs to withstand the speed fluctuation of 700r / min-8000r / min

The cooling capacity of the refrigeration equipment fluctuates so much that it is impossible to guarantee a high-precision refrigeration temperature (the minimum refrigeration temperature difference of the refrigeration equipment is about ±2°C), and the mobile refrigeration equipment needs to provide an uninterrupted power source for temperature maintenance , that is, the engine needs to run for a long time. This is because: the refrigeration compressor, the core component of traditional mobile refrigeration equipment, is driven by traditional machinery and needs the engine to provide a power source. Once the engine stops, the system cannot achieve refrigeration.

Compared with non-independent mobile refrigeration equipment, traditional independent refrigeration equipment operates more stably. Its refrigeration compressor does not depend on the operation of the car engine, but has a separate power and power supply system. When the car engine stops, it relies on the on-board The self-contained power unit can also refrigerate. Although the refrigerating performance is more stable than the former, it requires a lot of resources and costs.

At the same time, the maintenance cost required by the self-contained power equipment is also relatively high

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