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Low-noise electromagnetic heating device and control method thereof

A technology of electromagnetic heating device and control method, which is applied in induction heating control, induction heating and other directions, can solve the problems of electromagnetic heating device with large noise, limited noise reduction effect, influence on use experience, etc., so as to shorten the conduction time and make up for heating time, the effect of reducing the output power

Pending Publication Date: 2022-04-15
HONGYANG HOME APPLIANCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Electromagnetic heating is widely used in the field of kitchen appliances due to its high energy efficiency and high safety. However, when it heats liquid, the coupling noise between the electromagnetic field and the appliance to be heated (the resonant frequency superimposes each other) and the blasting noise of superimposed liquid boiling will make the electromagnetic heating The noise of the device is large, which affects people's experience
[0003] In order to solve the above problems, people have invented the method of increasing the heating power when it is close to the boiling state, hoping to quickly discharge the air bubbles in the liquid and reduce the noise, but in fact, if only by increasing the power, the noise cannot be solved. On the one hand, when the noise is not close to boiling, the noise is also very loud at the front of the boiling. On the other hand, only changing the power but keeping the resonance frequency unchanged, the coupled noise superposition is still very large, and the noise reduction effect is very limited.

Method used

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  • Low-noise electromagnetic heating device and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0036] see figure 2 The flow chart of the low-noise control method of the electromagnetic heating device of the present invention is shown, specifically including:

[0037] The user starts the electromagnetic heating device, the electromagnetic coil generates a high-frequency alternating magnetic field, and the container to be heated is coupled with the alternating magnetic field to generate heat to heat the liquid or the mixture of the liquid and the ingredients. For the sake of uniformity and convenience, this manual focuses on the fact that the liquid is water Condition.

[0038] Step S1: The main control unit outputs a PWM signal to control the electromagnetic coil to generate an alternating magnetic field, and the container is coupled with the alternating magnetic field to heat the liquid inside;

[0039] Step S2: The main control unit obtains the real-time temperature T of the liquid in the container through the temperature sensor. When the real-time temperature T reac...

Embodiment approach 2

[0046] see Figure 4 As shown, the flow chart of the low noise control method of the electromagnetic heating device of the present invention specifically includes:

[0047] Step S1: The main control unit outputs a PWM signal to control the electromagnetic coil to generate an alternating magnetic field, and the container is coupled with the alternating magnetic field to heat the liquid inside;

[0048] Step S2: The main control unit obtains the real-time temperature T of the liquid in the container through the temperature sensor. When the real-time temperature T reaches the preset temperature T1, the main control unit adjusts the PWM signal to reduce the output power of the electromagnetic coil.

[0049] Step S3: When the real-time temperature T reaches the preset temperature T2, the main control unit adjusts the PWM signal to increase the output power of the electromagnetic coil; wherein T2 is greater than T1.

[0050] As a preferred embodiment, the adjustment of the PWM sign...

Embodiment approach 3

[0057] see Figure 6 As shown, the schematic diagram of the low-noise electromagnetic heating device of the present invention includes an electromagnetic wire reel 1, a main control unit 2, a container 3 placed above the electromagnetic wire reel, a temperature sensor 4 for detecting the temperature in the container, and an interface for user operation ( Not shown in the figure), the temperature sensor 4 is arranged below the container 3 to detect the temperature in the container, the container is filled with liquid or food materials mixed with liquid and solid, and the interface (not shown in the figure) is provided with a silent mode operation Press the button (not shown in the figure), activate the silent mode operation button, and the main control unit executes the low-noise control method of the above-mentioned embodiment 1 or embodiment 2.

[0058] Specifically, as a preferred embodiment, this embodiment is attached image 3 Taking the electromagnetic heating water boil...

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Abstract

The invention relates to a low-noise control method of an electromagnetic heating device and a low-noise electromagnetic heating device, which are mainly used for reducing the power in the sudden generation stage of bubbles in liquid through temperature detection and PWM (Pulse Width Modulation) signal adjustment so as to realize stable bubble discharge and avoid large noise caused by explosion of excessive gathered bubbles. Furthermore, superposition of electromagnetic coupling noise in a specific temperature stage is avoided by changing the frequency of the PWM signal, the noise reduction effect is obvious, and the use experience of a user is greatly improved.

Description

technical field [0001] The invention relates to the field of kitchen appliances, in particular to a low-noise control method for an electromagnetic heating device. Background technique [0002] Electromagnetic heating is widely used in the field of kitchen appliances due to its high energy efficiency and high safety. However, when it heats liquid, the coupling noise between the electromagnetic field and the appliance to be heated (the resonant frequency superimposes each other) and the blasting noise of superimposed liquid boiling will make the electromagnetic heating The noise of the device is relatively large, which affects people's experience in use. [0003] In order to solve the above problems, people have invented the method of increasing the heating power when it is close to the boiling state, hoping to quickly discharge the air bubbles in the liquid and reduce the noise, but in fact, if only by increasing the power, the noise cannot be solved. On the one hand, when ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/06
Inventor 朱泽春胡文飞黎岩马文
Owner HONGYANG HOME APPLIANCES