Cold-chain refrigeration house numerical control sine high-voltage ion power supply device

Abstract

The invention discloses a numerical control sine high-voltage ion power supply device for a cold-chain refrigeration house. The system comprises a main ion power supply and a plurality of auxiliary ion power supplies, the main ion power supply is connected with the auxiliary ion power supplies through RS232 ports, the main ion power supply is connected with a main controller through RS485 ports, and the main ion power supply is further electrically connected with a start/stop and sound-light alarm indicator lamp and a door diameter. According to the invention, a single sine high-voltage ion power supply is 40VA; a boost converter can be additionally arranged in the full-bridge inverter plate. The power can be increased to 80VA; the display control panel can be connected with six sine high-voltage ion power supplies through RS232 control; each current and each voltage are singly set; current and voltage of a single sine high-voltage ion power supply can be independently displayed through key switching, alarm reasons of the single sine high-voltage ion power supply can also be displayed through key switching, each sine high-voltage ion power supply provides remote'start, stop 'and sound-light alarm, and workers can start/stop the sine high-voltage ion power supply at a distance beyond 30 meters.

Description

technical field [0001] The invention relates to the technical field of power supply equipment, in particular to a numerically controlled sinusoidal high-voltage ion power supply device for a cold chain cold storage. Background technique [0002] The acceleration of the pace of modern life and the improvement of living standards have made people have higher and higher requirements for the quality of fresh fruits and vegetables and other agricultural products. Each has their own shortcomings. The cold chain cold storage numerical control sinusoidal high-voltage ion power supply uses a high-voltage electric field to generate ion mist and a certain amount of ozone. The negative ions in it have the effect of inhibiting metabolism and respiratory intensity, and the ozone has the effect of inhibiting bacteria and oxidizing ethylene, so that it can be effective on new fruits and vegetables. The product plays a fresh-keeping role, and has the advantages of low energy consumption and ...

AI Technical Summary

Problems solved by technology

Different output voltages can be obtained by switching the taps of the transformer through a relay. Advantages: simple circuit and low cost; disadvantages: output voltage of industrial frequency transformers is easily affected by output load and grid voltage fluctuations, not suitable for 110V / 230V full voltage, output frequency (with Mains consistent) is not adjustable, and the output voltage adjustment (by switching transformer taps) accuracy is also very poor 10%

The power frequency transformer itself is also large in size, low in efficiency and high in heat generation

[0005] 2. Use a power frequency transformer to step down and rectify the mains voltage to obtain a safe voltage, then produce a sine wave through SPWM technology, and then increase the voltage to 3KV~7KV through a step-up transformer. Advantages: the output voltage is not affected by the output load, The output voltage adjustment accuracy is 1% higher, and the output sine wave frequency can be adjusted. Disadvantages: the power provided by a single machine is not large, and it cannot be paralleled. It is not suitable for large-scale cold storage. There is no remote communication. Each unit needs to be set individually by the staff. The front stage uses a commercial frequency power supply, which is not suitable for 110V / 230V full voltage

Images