Power control method for food processor

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

Active Publication Date: 2018-01-05
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 for food processor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0054] S101. During the working process of controlling the heating device of the food processing machine in a preset drop-wave heating control mode, detect the working voltage of the food processing machine.

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

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

[0057] 2, 3 / 4P 额 (3 AC half-wave guides are on, and 1 is off), control the wave-off ratio n=3 / 4;

[0058] 3. 2 / 3P 额 (2 AC half-wave guides are on, and 1 is off), control the wave-off ratio n=2 / 3;

[0059] 4. 1 / 2P 额 (1 AC half-wave conduction, 1 off), control wave drop ratio n=1 / 2;

[0060] 5. 1 / 3P 额 (1 AC half-wave conduction, 2 off), control wave drop ratio n=1 / 3;

[0061] 6. 1 / 4P ...

Embodiment 2

[0081] On the basis of the first embodiment, this embodiment further limits the ways of obtaining the first power P1 and the second power P2.

[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] in, u 额 Indicates the rated voltage, U 实 Indicates the actual working voltage, n indicates the drop-off ratio of the heating device, and T refers to the control period of the AC half-wave, which is T AC half-waves.

[0084] In the embodiment of the present invention, the food processing machine controls heating with T alternating half-wave cycles, and the rated voltage AD value of the food processing machine is V 0 , real-time voltage AD value V 1 , if the wave drop ratio of the heating power P is n, and the resistance value of the heating device is R, then when the voltage is the rated voltage V 0 hour, During the control period T there ...

Embodiment 3

[0100] In this embodiment, on the basis of the first and second embodiments, the acquisition manners of the first duration T1 and the second duration T2 are 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 wave drop ratio n of the heating power P1 and P2 1 , n 2 And m value confirmation, specifically can be realized through the following scheme.

[0102] Optionally, the method may also include:

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

[0104] Calculate the first time length T1 and the second time length T2 respectively 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 th...

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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] Embodiments of the present invention relate to a control technology of a food processing machine, in particular to a power control method of a food processing machine. Background technique [0002] Food processors (such as soybean milk machines) currently on the market 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 to 1.1 times their rated voltage. However, under different voltage conditions, the heating power of the heating device is different, and the impact on the pulping performance is also different, resulting in a large difference in the performance of the food processor under different voltage conditions. When the abnormal voltage is high or low, it is easy to There are problems such as overflowing and undercooking; not only that, due to the large difference in heating power under different voltages of the food processor, the heating time of the food proc...

Claims

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Application Information

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