Control method of food processing machine

Abstract

The invention provides a control method of a food processing machine. The food processing machine comprises a control device and a load, wherein the control device is capable of controlling the load to work through a silicon controlled rectifier; the rated power of the load is P0; the control device performs regular control on the silicon controlled rectifier to obtain the load power P, and a power generation unit and a power adjusting unit are arranged in one control cycle T; the cycle of the power generating unit is X, and the cycle of the power adjusting unit is Y; the power generated by the power generating unit is P1; P=(X / (X+Y))*P1; the cycles X and Y are correspondingly the integer multiples of a half-wave cycle. With the adoption of the method, the problem of instability caused byindependently performing a wave losing control mode or a chopping control mode is avoided; the problems such as detection delay of zero-crossing signals and limitation of the accuracy of the machine can be solved; the food processing machine can work with low constant power, and thus the food preparation quality can be improved.

Description

technical field [0001] The invention relates to the technical field of low-power control methods, in particular to a control method for a food processing machine. Background technique [0002] With the continuous development of science and technology, and people's constant pursuit of quality of life, food processors have begun to become a daily necessity for people, such as soybean milk machines, porridge machines, cooking machines and so on. [0003] As we all know, existing household food processors generally have a heating function or a crushing and stirring function, or have two functions of heating and crushing and stirring at the same time. In order to make the food processing machine better complete the processing of food raw materials, the control of the power of heating and crushing and stirring is an important index of the food processing machine. The thyristor, as a power regulating device, is widely used in household food processors. [0004] In the prior art, ...

AI Technical Summary

Problems solved by technology

Due to the limitations of the device itself, the control circuit, and safety regulations, both methods have defects when the food processor requires less power.

If the thyristor is controlled by the chopper control method, if the required power is smaller, the trigger point of the thyristor will be closer to the zero-crossing point of the mains. However, due to the delay of zero-crossing signal detection and control accuracy, it will The trigger point of the thyristor directly coincides with the actual zero crossing point, or enters the next wave after passing the zero crossing point, so that the thyristor cannot be triggered or the power is unstable, and the required low power cannot be achieved.

[0005] If the wave-drop control method is used to control the thyristor, although the above-mentioned problems of the chopping control method will not occur, the realization of smaller power is based on long-term non-conduction, so that the average power in the entire cycle is reduced. During the time period when the thyristor is triggered, the power of the load is high

And because of the requirements of power drop in the safety regulations, this control method cannot meet the actual needs.

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