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Power control method of a food processing machine

A food processing machine, power control technology, applied in temperature control, control/regulation system, non-electric variable control, etc., can solve the problems of accuracy and reliability, high cost, single power gear, etc.

Active Publication Date: 2020-04-14
JOYOUNG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chopper heating: The power of the heating device is controlled by controlling the conduction angle of the AC half wave. The advantage is that the power control is precise, and the power can be adjusted steplessly. To adapt to different voltages, only need to adjust the conduction angle of the AC half wave to ensure the stability of the power of the heating device. However, there is a big disadvantage. When the heating power is large (above 500W), if chopping heating is used, there will be a large harmonic current disturbance (the national standard has requirements for harmonic current), and an additional complex circuit is required to Solve the harmonic current problem, the cost is very high;
[0006] Dropped wave heating: the power of the heating device is controlled by controlling the conduction ratio of the AC half-wave. , turn off 1 half-wave)
Moreover, the half-wave control period of wave-drop heating cannot be lower than 1 / 5 (that is, one half-wave is turned on and four half-waves are turned off), otherwise there will be voltage flickering problems, which do not meet the requirements of the national standard
Moreover, when the voltage changes, there is no accurate and reliable voltage adaptive method in the prior art
[0007] Due to the large harmonic current problem in chopping heating, solving the harmonic current needs to increase the very high cost, so the existing technology basically uses the wave-drop heating control method to adjust the power of the heating device
However, the existing method of wave drop control technology to control the adjustment of heating power with voltage has only a few gears such as P, 3 / 4P, 2 / 3P, 1 / 2P, 1 / 3P, 1 / 4P, etc. , lower the voltage gear at high voltage and increase the power gear at low voltage, it is impossible to guarantee accurate and reliable heating power in the full voltage range

Method used

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  • Power control method of a food processing machine
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  • Power control method of a food processing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] A power control method for food processing machines, such as figure 1 As shown, the method may include S101-S102:

[0054] S101. Detect the working voltage of the food processor during the working process of controlling the heating device of the food processor in a preset wave-dropping heating control mode.

[0055] In the embodiment of the present invention, during the working process of the food processor in the wave-dropping heating control mode, the set power gear may include:

[0056] 1. Rated power (ie full power) P amount (AC half-wave full conduction), control the wave ratio n=1;

[0057] 2. 3 / 4P amount (3 AC half-waveguides pass and 1 closed), control the wave-drop ratio n=3 / 4;

[0058] 3. 2 / 3P amount (2 AC half-waveguides pass and 1 off), control the wave-drop ratio n=2 / 3;

[0059] 4. 1 / 2P amount (1 AC half-waveguide is open, 1 is closed), control the wave-drop ratio n=1 / 2;

[0060] 5. 1 / 3P amount (1 AC half-waveguide pass, 2 closed), control the wave-dropping ratio n=1 / ...

Embodiment 2

[0081] This embodiment further defines the method for obtaining the first power P1 and the second power P2 on the basis of the first embodiment.

[0082] Optionally, the first power P1 and the second power P2 are determined according to the conduction half-wave ratio m in the control period in the wave-drop heating control mode;

[0083] among them, U amount Represents the rated voltage, U real Represents the actual working voltage, n represents the drop-wave ratio of the heating device, and T means that the control period of the AC half-wave is T AC half-waves.

[0084] In the embodiment of the present invention, the food processor controls heating with T alternating half-wave cycles, and the rated voltage AD of the food processor is V 0 , Real-time voltage AD value V 1 , If the wave-dropping ratio of the heating power P is n and the resistance of the heating device is R, then when the voltage is the rated voltage V 0 Time, In the control period T When the real-time AC voltage sa...

Embodiment 3

[0100] In this embodiment, on the basis of the first and second embodiments, the method for obtaining the first duration T1 and the second duration T2 is further limited.

[0101] In the embodiment of the present invention, the working time T1 and T2 of the heating power P1 and P2 can be controlled according to the heating power P1 and P2. 1 , N 2 And the confirmation of m value can be realized by the following scheme.

[0102] Optionally, the method may further include:

[0103] Acquiring, according to the determined first power P1 and second power P2, a second wave-dropping ratio n2 and a third wave-dropping ratio n3 corresponding to the first power P1 and the second power P2, respectively;

[0104] Calculate the first duration T1 and the second duration T2 according to the conduction half-wave ratio m, the second wave-drop ratio n2, the third wave-drop ratio n3 and the following equations:

[0105]

[0106] In the embodiment of the present invention, if the heating control period is ...

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Abstract

The embodiment of the invention discloses a power control method for a food processor. The method includes the steps that when a heating device of the food processor is controlled to work in the preset mode of wave-drop heating, the working voltage of the food processor is detected; when the detected working voltage is rated voltage, the heating device is controlled to work at rated power P; whenthe detected working voltage is not the rated voltage, the heating device is controlled to work for preset time length at multiple kinds of preset power corresponding to current first working voltage,wherein energy generated when the heating device works at the power by total time length is equal to that generated after the heating device works at the rated power P by the total time length. In the scheme of the power control method, the heating power of the heating device is accurately and reliably adjusted according to voltage changes within the full-voltage range.

Description

Technical field [0001] The embodiment of the present invention relates to a control technology of a food processing machine, in particular to a power control method of a food processing machine. Background technique [0002] At present, food processors on the market (such as soymilk machines) are generally designed to be used in a wide voltage range, and the national standard also requires food processors to work normally at 0.9-1.1 times the rated voltage. However, under different voltage conditions, the heating power of the heating device is different, and the effect on the pulping performance is different, resulting in a large difference in the performance of the food processor under different voltage conditions. When the voltage is abnormal, the power of the heating device is easy to be high or low. Problems such as overflowing pulp and undercooking occur; not only that, the heating power of the food processor varies greatly under different voltages, which leads to different ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/20A47J27/00
Inventor 王旭宁吴涯余青辉
Owner JOYOUNG CO LTD