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A low-power control method for a food processor

A technology of a food processing machine and a control method, which is applied in the direction of control/adjustment system, adjustment of electric variables, instruments, etc., can solve the problems of unstable power of silicon controlled rectifiers, failure to meet actual needs, and inability to achieve low power, etc., to achieve small Heating with constant power, keeping thermal inertia stable, solving the effect of zero-crossing signal detection delay and device accuracy constraints

Active Publication Date: 2016-04-06
JOYOUNG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • A low-power control method for a food processor

Examples

Experimental program
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Effect test

Embodiment 1

[0031] The invention relates to a low-power control method for a food processing machine. The food processing machine includes a load, a thyristor for controlling the power of the load, and a main control chip for triggering the thyristor. The rated power of the load is P. The triggering of the thyristor includes a chopping control mode and a wave drop control mode, wherein the main control chip triggers the thyristor in a chopping control mode in the conduction wave of the wave drop control mode.

[0032] Such as figure 1 As shown, in this embodiment, the load includes a heating device RG, and the main control chip MCU controls and triggers the thyristor TR1 through a driving circuit, and the driving circuit includes a resistor R1, a transistor Q1, and a resistor R2, Capacitor C1, the base of the triode Q1 is electrically connected to the main control chip MCU through a current limiting resistor R1, the collector of the triode Q1 is electrically connected to the control termi...

Embodiment 2

[0043] The difference between this embodiment and the above-mentioned embodiment 1 is that the conduction wave is any number of waves within the triggering period of the thyristor. It is set that the heating device needs to realize the power of 1 / 5P to work, and the conduction wave can be used as one wave in the triggering period of the thyristor, or multiple conduction waves can be used.

[0044] Such as Figure 4 As shown, η can be selected as 1 / 2, and λ is 0.4. At this time, the power control of 1 / 5P can be realized for the heating device. Make the power more stable.

[0045] Such as Figure 5 As shown, when the main control chip triggers the silicon controlled rectifier in the mode of wave drop control, η is 2 / 3, and the heating device needs to realize 1 / 5P power to work at this time, then the main control chip is controlled by chopping When the trigger is controllable, its proportion in each conduction wave λ is 0.3, that is, the main control chip only needs to trigger...

Embodiment 3

[0048] The difference between this embodiment and the above-mentioned embodiment 1 is that, as Figure 6 As shown, the main control chip takes the control time of the drop-wave control mode as a thyristor trigger cycle, and the main control chip works with the thyristor trigger cycle as a cycle, that is, the main control chip The chip cyclically triggers the thyristor with a thyristor trigger cycle.

[0049] The heating device RG needs to use 1 / 10P of power to work. If the method in the present invention is adopted, when the main control chip is selected to trigger the thyristor in the chopping control mode, its proportion in the conduction wave is 0.4, that is, λ=0.4, according to λη=1 / n, then η= 1 / 4. If the main control chip alone controls the thyristor with this parameter, the heating device can operate at a constant power. At this time, the main control chip triggers the SCR in the way of wave drop control, so that the power of the heating device is 1 / 4P, that is, the m...

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PUM

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Abstract

The invention provides a small power control method of a food processor. The food processor comprises a load, controllable silicon which controls the power of the load and a main control chip which triggers the controllable silicon. The rated power of the load is P, and the triggering method of the controllable silicon comprises a chopper control mode and a wave-off control mode. The main control chip triggers the controllable silicon in the chopper control mode in connected waves of the wave-off control mode. The unstable problem happening when the wave-off control mode or the chopper control mode is used independently is solved, and the problems of delaying of zero passage signal detection, limiting of the precision of the device and the like are solved. The food processor is made to work by using constant small power, and thus the quality for making food can be improved.

Description

technical field [0001] The invention relates to the technical field of low-power control methods, in particular to a low-power control method for a food processor. 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,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/66
Inventor 王旭宁余青辉王盼盼
Owner JOYOUNG CO LTD