A water-cooled semi-conductor refrigeration fruit and vegetable fresh-keeping box frequency conversion control system

Abstract

The invention discloses a variable frequency control system of a water-cooled semiconductor refrigeration fruit / vegetable freshness preservation tank. The variable frequency control system uses an ARM as a control chip, comprises a temperature sensor transfer circuit, a relative humidity sensor driving circuit, a semiconductor refrigeration chip control circuit, a radiating fan control circuit, a refrigeration fan control circuit, a water pump control circuit, a display screen driving circuit, a prompt circuit, a key control circuit and a power supply conversion circuit, and realizes the control system touch screen control, the temperature control object selection, the refrigeration chip PID control, the water pump PID control, the radiating fan classification control, the cold-end fan classification control, the in-tank temperature field detecting control, the in-tank humidity detecting function and the alarming function setting. The variable frequency control system overcomes such defects as extensive control, high energy consumption, high temperature overshoot and large temperature difference in a traditional semiconductor refrigeration freshness preservation tank control system.

Description

technical field [0001] The invention relates to the technical field of fresh-keeping storage and transportation of fruits and vegetables, in particular to a water-cooled semiconductor refrigeration fruit and vegetable fresh-keeping box frequency conversion control system. Background technique [0002] In our country, during the storage and transportation of fruits and vegetables, temperature control is the most effective method. For every 10°C increase in the fresh-keeping environment temperature, the physiological response of fruits and vegetables increases by 2 to 3 times. There is a lack of equipment optimization for fruit and vegetable transportation in China. At the same time, due to the energy consumption of cold storage and the increase in storage and transportation costs, cold breaks often occur in the process of fruit and vegetable cold chains. The on-off control method commonly used in China has extensive temperature control, large overshoot, large temperature flu...

AI Technical Summary

Problems solved by technology

The on-off control method commonly used in China, the temperature control is extensive, the overshoot is large, the temperature fluctuation is large, and the energy consumption is high

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