Digital frequency conversion device of space electric field

Abstract

The invention discloses a digital frequency conversion device of a space electric field. The digital frequency conversion device comprises a mains supply end, an active power factor correction unit, apower conversion unit, a filter energy conversion unit, a battery / capacitor set, an isolation drive unit, a DSP central processing unit, a sampling feedback unit, an energy release unit, a sensor, aremote control unit and an electric field generating unit and is characterized in that the mains supply end is subjected to boosting through the active power factor correction unit under the control of a digital controller and converts altering-current voltage into direct-current voltage, the direct-current voltage is inverted into pulses or alternating-current voltage output through the power conversion unit, and the voltage and frequency of the electric field generator are controlled through the DSP central processing unit. By the digital frequency conversion device, agricultural product fresh-keeping can be achieved, and product storage cycle can be prolonged.

Description

technical field [0001] The invention relates to a digital frequency conversion device, in particular to a digital frequency conversion device for a space electric field, and belongs to the technical field of food preservation equipment. Background technique [0002] Every food has a preservation period, and with different types of food, its preservation period is also different. At present, there are three main methods of food preservation in the world: refrigeration, freezing and chemical preservation; refrigeration and freezing may It is the most widely used food preservation method today. The purpose of refrigeration is to slow down the action of bacteria, so that food can be preserved for a longer time (it can be kept fresh for about a week or two, instead of only half a day), but it is difficult to further extend the preservation time Do it; and the purpose of freezing is to prevent all bacterial action, because bacteria will completely lose their activity under freezin...

AI Technical Summary

Problems solved by technology

Freezing has no effect on the taste and texture of most meats and very little on vegetables, but it completely changes the texture of fruit (the pulp becomes mushy) and can also destroy the texture of fish and meat , so it is not universal

[0004] Chemical preservation usually uses food preservatives. The commonly used preservatives for food include: benzoic acid, which is a food preservative allowed to be used in countries all over the world. It is easy to excrete with feces in animals, does not accumulate, has low toxicity and is cheap. Occupies most of the domestic preservative market; Butylated Hydroxyanisole (BHA) is one of the most widely used antioxidants in the world and has a strong anti-microbial effect. It is mainly used in edible oils and fats, and the maximum dosage is 0.2g / kg , the disadvantage is that the cost is higher; butylated hydroxytoluene (BHT) is one of the antioxidants with the largest production in my country at present, and the price is low, which is 1 / 5 to 1 / 8 of BHA, but the antioxidant property is not as strong as BHA. The scope of use is the same as that of BHA, but the disadvantage is higher toxicity

Therefore, the use of chemical preservation will inevitably lead to the residue of related chemicals, which will cause harm to the body of consumers in the process of eating

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