阅读说明：本技术 一种电磁加热设备工作控制方法及装置 (Work control method and device for electromagnetic heating equipment ) 是由 温国思 宋家普 王小波 于 2021-05-21 设计创作，主要内容包括：本发明涉及一种电磁加热设备工作控制方法及装置,包括：S1、获取电磁加热模块的目标功率；S2、根据目标功率获取其所对应的电磁加热模块的目标振荡频率；S3、根据目标振荡频率生成对应的频率波动阈值,其中频率波动阈值小于目标振荡频率；S4、根据目标振荡频率和频率波动阈值获取与目标振荡频率对应的一个或多个实时振荡频率,其中实时振荡频率与目标振荡频率的频率差值的绝对值小于频率波动阈值；S5、驱动电磁加热模块以一个或多个实时振荡频率工作。实施本发明能够有效的避免出现固定的差频或倍频信号,避免产生共振及噪声,以减小干扰。(The invention relates to a working control method and a device of electromagnetic heating equipment, comprising the following steps: s1, acquiring the target power of the electromagnetic heating module; s2, acquiring the target oscillation frequency of the corresponding electromagnetic heating module according to the target power; s3, generating a corresponding frequency fluctuation threshold value according to the target oscillation frequency, wherein the frequency fluctuation threshold value is smaller than the target oscillation frequency; s4, acquiring one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold, wherein the absolute value of the frequency difference between the real-time oscillation frequency and the target oscillation frequency is less than the frequency fluctuation threshold; and S5, driving the electromagnetic heating module to work at one or more real-time oscillation frequencies. The invention can effectively avoid the occurrence of fixed difference frequency or frequency multiplication signals, avoid the generation of resonance and noise and reduce the interference.)

1. An electromagnetic heating equipment work control method is characterized by comprising the following steps:

s1, acquiring the target power of the electromagnetic heating module;

s2, acquiring the target oscillation frequency of the corresponding electromagnetic heating module according to the target power;

s3, generating a corresponding frequency fluctuation threshold value according to the target oscillation frequency, wherein the frequency fluctuation threshold value is smaller than the target oscillation frequency;

s4, acquiring one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold, wherein the absolute value of the frequency difference between the real-time oscillation frequency and the target oscillation frequency is smaller than the frequency fluctuation threshold;

and S5, driving the electromagnetic heating module to work at the one or more real-time oscillation frequencies.

2. The operation control method of an electromagnetic heating apparatus according to claim 1, wherein in step S4, said obtaining one or more real-time oscillation frequencies corresponding to the target oscillation frequency based on the target oscillation frequency and the frequency fluctuation threshold value includes:

sequentially acquiring a plurality of real-time oscillation frequencies in a first preset step;

in the step S5, the driving the electromagnetic heating module to operate at the one or more real-time oscillation frequencies includes:

and driving the electromagnetic heating module to work at the plurality of real-time oscillation frequencies in sequence.

3. The operation control method of an electromagnetic heating apparatus according to claim 2, wherein the plurality of real-time oscillation frequencies are sequentially obtained in a first preset step; the method comprises the following steps:

sequentially acquiring the real-time oscillation frequencies from small to large; or

And acquiring the plurality of real-time oscillation frequencies in sequence from large to small.

4. The operation control method of an electromagnetic heating apparatus according to claim 1, characterized by further comprising:

circularly driving the electromagnetic heating module to work at the one or more real-time oscillation frequencies in sequence; or

And when the electromagnetic heating module is driven to work at the one or more real-time oscillation frequencies in sequence, each real-time oscillation frequency works for at least one period.

5. The operation control method of an electromagnetic heating apparatus according to claim 1, characterized by further comprising:

and adjusting the target power according to a second preset step, and executing the step S2 after each target power adjustment.

6. The operation control method of an electromagnetic heating apparatus according to claim 5, characterized by further comprising:

when it is determined that the target power satisfies a preset value, the adjustment of the target power is stopped, and the step S2 is executed.

7. The operation control method of an electromagnetic heating apparatus according to claim 1, characterized by further comprising:

S1A, randomly generating a reference pulse in the pot detection process of the electromagnetic heating equipment;

S2A, generating a pulse fluctuation threshold value according to the reference pulse, wherein the pulse fluctuation threshold value is smaller than the pulse width of the reference pulse;

S3A, generating one or more real-time pulses according to the reference pulse and the pulse fluctuation threshold value, wherein the absolute value of the pulse width difference between the real-time pulses and the reference pulse is smaller than the pulse fluctuation threshold value;

S4A, driving the electromagnetic heating module to generate pot detection signals according to the one or more real-time pulses to obtain pot detection feedback signals.

8. The method for controlling the operation of an electromagnetic heating apparatus according to claim 7, wherein in the step S3A, the generating one or more real-time pulses according to the reference pulse and the pulse fluctuation threshold value includes:

sequentially generating a plurality of real-time pulses corresponding to the reference pulses in a third preset step;

in the step S4A, the driving the electromagnetic heating module to generate a pan detection signal according to the real-time pulse to obtain a pan detection feedback signal includes:

and driving the electromagnetic heating module to generate pot detection signals in sequence according to the plurality of real-time pulses.

9. The operation control method of an electromagnetic heating apparatus according to claim 8, wherein the plurality of real-time pulses are sequentially generated at a third preset step; the method comprises the following steps:

sequentially generating the plurality of real-time pulses in a descending order; or

The plurality of real-time pulses are generated sequentially in a descending order.

10. The operation control method of an electromagnetic heating apparatus according to claim 9, characterized by further comprising:

and S5A, judging whether the cookware is normal or not according to the cookware detection feedback signal, if so, executing the step S1, and otherwise, executing the step S1A, the step S2A or the step S4A.

11. An electromagnetic heating apparatus heating control device, comprising:

the first acquisition unit is used for acquiring the target power of the electromagnetic heating module;

the second acquisition unit is used for acquiring the target oscillation frequency of the corresponding electromagnetic heating module according to the target power;

a first execution unit, configured to generate a corresponding frequency fluctuation threshold according to the target oscillation frequency, where the frequency fluctuation threshold is smaller than the target oscillation frequency;

a second execution unit, configured to obtain one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold, where an absolute value of a frequency difference between the real-time oscillation frequency and the target oscillation frequency is smaller than the frequency fluctuation threshold;

and the driving unit is used for driving the electromagnetic heating module to work at the one or more real-time oscillation frequencies.

Technical Field

The invention relates to the technical field of electromagnetic heating equipment, in particular to a method and a device for controlling the work of electromagnetic heating equipment.

Background

In the use of electromagnetic heating devices, such as induction cookers, they rely primarily on the oscillation of an electromagnetic heating plate to generate power for heating. When the heating mode of the traditional electromagnetic heating plate is used, the oscillation frequency of the traditional electromagnetic heating plate is limited by the induction heating coil and the oscillation capacitor, and when the electromagnetic heating plate works, the generated higher harmonics are concentrated and the energy is gathered. A common measure to reduce the test interference is to increase the circuit consumption of interference energy, such as adding a differential mode and common mode filter, to ensure compliance with the certification standards during the EMI test. It inevitably requires a high device cost, and the increase of the circuit increases the volume and weight, and cannot achieve light weight.

Disclosure of Invention

The present invention provides a method and an apparatus for controlling operation of an electromagnetic heating device, aiming at some technical defects in the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the work control method of the electromagnetic heating equipment is constructed and comprises the following steps:

s1, acquiring the target power of the electromagnetic heating module;

s2, acquiring the target oscillation frequency of the corresponding electromagnetic heating module according to the target power;

s3, generating a corresponding frequency fluctuation threshold value according to the target oscillation frequency, wherein the frequency fluctuation threshold value is smaller than the target oscillation frequency;

s4, acquiring one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold, wherein the absolute value of the frequency difference between the real-time oscillation frequency and the target oscillation frequency is smaller than the frequency fluctuation threshold;

and S5, driving the electromagnetic heating module to work at the one or more real-time oscillation frequencies.

Preferably, in the step S4, the obtaining one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold includes:

sequentially acquiring a plurality of real-time oscillation frequencies in a first preset step;

in the step S5, the driving the electromagnetic heating module to operate at the one or more real-time oscillation frequencies includes:

and driving the electromagnetic heating module to work at the plurality of real-time oscillation frequencies in sequence.

Preferably, the plurality of real-time oscillation frequencies are sequentially acquired in a first preset step; the method comprises the following steps:

sequentially acquiring the real-time oscillation frequencies from small to large; or

And acquiring the plurality of real-time oscillation frequencies in sequence from large to small.

Preferably, the method for controlling the operation of the electromagnetic heating apparatus according to the present invention further includes:

circularly driving the electromagnetic heating module to work at the one or more real-time oscillation frequencies in sequence; or

And when the electromagnetic heating module is driven to work at the one or more real-time oscillation frequencies in sequence, each real-time oscillation frequency works for at least one period.

Preferably, the method for controlling the operation of the electromagnetic heating apparatus according to the present invention further includes:

and adjusting the target power according to a second preset step, and executing the step S2 after each target power adjustment.

Preferably, the method for controlling the operation of the electromagnetic heating apparatus according to the present invention further includes:

when it is determined that the target power satisfies a preset value, the adjustment of the target power is stopped, and the step S2 is executed.

Preferably, the method for controlling the operation of the electromagnetic heating apparatus according to the present invention further includes:

S1A, randomly generating a reference pulse in the pot detection process of the electromagnetic heating equipment;

S2A, generating a pulse fluctuation threshold value according to the reference pulse, wherein the pulse fluctuation threshold value is smaller than the pulse width of the reference pulse;

S3A, generating one or more real-time pulses according to the reference pulse and the pulse fluctuation threshold value, wherein the absolute value of the pulse width difference between the real-time pulses and the reference pulse is smaller than the pulse fluctuation threshold value;

S4A, driving the electromagnetic heating module to generate pot detection signals according to the one or more real-time pulses to obtain pot detection feedback signals.

Preferably, in step S3A, the generating one or more real-time pulses according to the reference pulse and the pulse fluctuation threshold includes:

sequentially generating a plurality of real-time pulses corresponding to the reference pulses in a third preset step;

in the step S4A, the driving the electromagnetic heating module to generate a pan detection signal according to the real-time pulse to obtain a pan detection feedback signal includes:

and driving the electromagnetic heating module to generate pot detection signals in sequence according to the plurality of real-time pulses.

Preferably, the plurality of real-time pulses are sequentially generated in a third preset step; the method comprises the following steps:

sequentially generating the plurality of real-time pulses in a descending order; or

The plurality of real-time pulses are generated sequentially in a descending order.

Preferably, the method for controlling the operation of the electromagnetic heating apparatus according to the present invention further includes:

and S5A, judging whether the cookware is normal or not according to the cookware detection feedback signal, if so, executing the step S1, and otherwise, executing the step S1A, the step S2A or the step S4A.

The present invention also provides a heating control device for an electromagnetic heating apparatus, including:

the first acquisition unit is used for acquiring the target power of the electromagnetic heating module;

the second acquisition unit is used for acquiring the target oscillation frequency of the corresponding electromagnetic heating module according to the target power;

a first execution unit, configured to generate a corresponding frequency fluctuation threshold according to the target oscillation frequency, where the frequency fluctuation threshold is smaller than the target oscillation frequency;

a second execution unit, configured to obtain one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold, where an absolute value of a frequency difference between the real-time oscillation frequency and the target oscillation frequency is smaller than the frequency fluctuation threshold;

and the driving unit is used for driving the electromagnetic heating module to work at the one or more real-time oscillation frequencies.

The electromagnetic heating equipment work control method and the device have the following beneficial effects that: fixed difference frequency or frequency multiplication signals can be effectively avoided, resonance and noise are avoided, and interference is reduced.

Drawings

The invention will be further described with reference to the accompanying drawings and examples, in which:

fig. 1 is a flowchart of a process of an embodiment of a method for controlling an operation of an electromagnetic heating apparatus according to the present invention;

FIG. 2 is a schematic diagram illustrating an embodiment of a method for controlling an electromagnetic heating apparatus according to the present invention;

FIG. 3 is a flowchart illustrating the operation of an electromagnetic heating apparatus according to another embodiment of the present invention;

FIG. 4 is a logic block diagram of an embodiment of an operation control device of an electromagnetic heating apparatus according to the present invention;

fig. 5 is a logic block diagram of an embodiment of the operation control device of the electromagnetic heating equipment of the invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in fig. 1, in a first embodiment of an operation control method of an electromagnetic heating apparatus according to the present invention, the method includes: s1, acquiring the target power of the electromagnetic heating module; specifically, when the electromagnetic heating device is in operation, it may set different target powers according to the operation requirement, and in a specific process, it generates the target power to perform heating.

S2, acquiring the target oscillation frequency of the corresponding electromagnetic heating module according to the target power; specifically, when the electromagnetic heating module obtains the target power obtained according to the working power or the gear, the target oscillation frequency corresponding to the electromagnetic heating module is calculated according to the target power. When the electromagnetic heating module works, the power and the oscillation frequency are in a corresponding relation. It can be understood that after the target power is calculated according to the output power requirement, the oscillation frequency corresponding to the electromagnetic heating module during operation is obtained according to the target power calculation, which can be understood as the central oscillation frequency corresponding to the power at the center, and can also be the average oscillation frequency.

S3, generating a corresponding frequency fluctuation threshold value according to the target oscillation frequency, wherein the frequency fluctuation threshold value is smaller than the target oscillation frequency; specifically, after the target oscillation frequency is obtained, a fluctuation range of the frequency is generated according to the target oscillation frequency, that is, a fluctuation range of the frequency is set with the target oscillation frequency as a reference frequency and a frequency fluctuation threshold as an upper limit and a lower limit, wherein the fluctuation range is not more than twice the target oscillation frequency.

S4, acquiring one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold, wherein the absolute value of the frequency difference between the real-time oscillation frequency and the target oscillation frequency is less than the frequency fluctuation threshold; specifically, after the fluctuation range of the frequency is obtained, a real-time oscillation frequency corresponding to the target oscillation frequency is generated in the fluctuation range, that is, the real-time oscillation frequency is a target oscillation frequency and is used as a reference frequency, and the real-time oscillation frequency is generated in a frequency fluctuation threshold range.

And S5, driving the electromagnetic heating module to work at one or more real-time oscillation frequencies. Specifically, after the real-time oscillation frequency is obtained, the electromagnetic heating module works according to the real-time oscillation frequency. The electromagnetic heating module is controlled to work at different real-time oscillation frequencies, so that the frequency modulation work can be understood and realized, and the phenomenon that resonance and noise are generated to cause interference exceeding standards due to the occurrence of fixed difference frequency or frequency multiplication signals is avoided. It is generally understood that the real-time oscillation frequency fluctuates up and down around the center frequency.

Optionally, in step S4, acquiring one or more real-time oscillation frequencies corresponding to the target oscillation frequency according to the target oscillation frequency and the frequency fluctuation threshold includes: sequentially acquiring a plurality of real-time oscillation frequencies in a first preset step; in step S5, driving the electromagnetic heating module to operate at the real-time oscillation frequency includes: and driving the electromagnetic heating module to work at a plurality of real-time oscillation frequencies in sequence. Specifically, the real-time oscillation frequency can be obtained according to a preset step, namely, a plurality of real-time oscillation frequencies are obtained within a certain fluctuation range, and when the electromagnetic heating module works, the electromagnetic heating module is driven to work at the plurality of real-time oscillation frequencies in sequence. And a plurality of real-time oscillation frequencies are obtained through presetting stepping, so that the scheme processing is simpler. The first preset step may be a set value or different random values.

Optionally, a plurality of real-time oscillation frequencies are sequentially obtained in a first preset step; the method comprises the following steps: sequentially acquiring a plurality of real-time oscillation frequencies according to a sequence from small to large; or a plurality of real-time oscillation frequencies are acquired in sequence from large to small. That is, the real-time oscillation frequencies may be obtained in a certain direction, that is, when the electromagnetic heating module operates, the real-time oscillation frequencies may be sequentially generated in order from small to large or from large to small. In one embodiment, the real-time oscillation frequency may be changed in a direction opposite to the adjustment direction of the target power, for example, when the target power is decreased to increased, the electromagnetic heating modules may be sequentially operated at the plurality of real-time oscillation frequencies in an order from increased to decreased.

In an embodiment, the operation control method of the electromagnetic heating apparatus of the present invention further includes: the circularly driven electromagnetic heating module works at one or more real-time oscillation frequencies in turn. That is, when the target power is constant, it may cycle the action again when the electromagnetic heating module is sequentially operated at the one or more real-time oscillation frequencies and all real-time oscillation frequency outputs are completed. The electromagnetic heating module is used for carrying out real-time oscillation on the real-time oscillation frequency in the power cycle, and the real-time oscillation frequency is obtained through the electromagnetic heating module. And (4) circulating. It will also be appreciated that the frequency fluctuation threshold generated by the power converter may be the same or different in each power cycle, i.e., the oscillation frequency generated by the power converter may be the same or different in each power cycle.

In an embodiment, the operation control method of an electromagnetic heating apparatus of the present invention further includes: and when the electromagnetic heating module is driven to work at one or more real-time oscillation frequencies in sequence, each real-time oscillation frequency works for at least one period. That is, during the real-time oscillating frequency traversal, the number of electromagnetic heating modules per power cycle is one or more per real-time oscillating frequency duty cycle. That is, when the electromagnetic heating module finishes traversing the real-time oscillation frequency, it can also set the duration period of the electromagnetic heating module working with each real-time oscillation frequency in the traversing process, and only after the oscillation frequency of the set period is worked, the electromagnetic heating module can work with the next real-time oscillation frequency.

In an embodiment, the operation control method of the electromagnetic heating apparatus of the present invention further includes: the target power is adjusted according to the second preset step, and step S2 is executed after each target power adjustment. Specifically, when the electromagnetic heating apparatus is operated, the target power of the electromagnetic heating apparatus may be adjusted according to the operation setting requirement, and after the target power is adjusted each time, the step S2 and the following steps may be performed. In a specific embodiment, when the soft start is adopted, namely the electromagnetic heating device is driven to perform the soft start at a high frequency and a low power, in the soft start process, an initial start power is set, a plurality of corresponding real-time oscillation frequencies are generated according to the oscillation frequency setting corresponding to the initial start power, and the electromagnetic heating device is driven to operate at the real-time oscillation frequencies. In the soft start process, the target power of the electromagnetic heating module is gradually increased, the corresponding target oscillation frequency is gradually reduced at the moment, and a plurality of corresponding real-time oscillation frequencies are generated according to the increased target power when the target power is increased once, so that the electromagnetic heating module works at the plurality of real-time oscillation frequencies.

In an embodiment, the operation control method of the electromagnetic heating apparatus of the present invention further includes: when it is determined that the target power satisfies a predetermined value, the adjustment of the target power is stopped, and step S2 is executed. That is, on the basis of the above, when it is determined that the target power has reached a certain set value, for example, the set power of the set electromagnetic heating device, it may not be necessary to perform the target power adjustment, at which point the adjustment of the target power may be stopped, and the above step S2 and the following steps may be performed to control the operation of the electromagnetic heating module.

In a specific electromagnetic oven, as shown in fig. 2, the control method comprises the steps of setting the working power or gear of the electromagnetic oven, and obtaining the working power or gear. Wherein, curve A is corresponding to power curve, curve B is corresponding to oscillation frequency curve, first through the low power start-up namely soft start-up, and reach this working power step by step. Wherein, during the soft start process (corresponding to the t1 paragraph): and triggering to generate low power, namely correspondingly generating higher frequency, setting the fluctuation range of the oscillation frequency as Y by taking the frequency as X, wherein the value of Y satisfies 0< Y < X, controlling the range of the oscillation frequency generated by the electromagnetic heating module to be (X +/-Y), namely the generated oscillation frequency can be changed from (X + Y) to (X-Y), and the generated oscillation frequency can be changed from large to small to generate fluctuation corresponding to the curve B. The step of the change can be set according to a specific scene. For example, at a target oscillation frequency X of 25KHZ, a fluctuation range of the target oscillation frequency Y is 2KHz, and a variation step of the fluctuation is 0.5 KHz. Then the real-time oscillation frequencies obtained in step are (23, 23.5, 24, 24.5, 25, 25.5, 26, 26.5, 27) KHz 9 frequency combinations, the electromagnetic heating module operates 10 cycles at each frequency, and all oscillation frequencies are traversed, finally the working cycle of an electromagnetic heating module corresponding to the power is completed, that is, a power cycle is corresponding, and the time T is 9 cycles by 10. During the power period, the oscillation frequency changes dynamically from high to low, and each change generates no or less repetition in a long period. After the power is adjusted, in a period corresponding to the new power, the required oscillation frequency X ' is within a fluctuation range of Y ' in a single oscillation period, the value of Y ' satisfies 0< Y ' < X ', namely the new control oscillation frequency is (X ' + -Y '), the new real-time oscillation frequency is changed from (X ' + Y ') KHz to (X ' -Y '), and the power period is completed according to the same specification. And so on until the power is adjusted to the required power. After the preset power is reached (corresponding to the period t 2), the oscillation frequency is still output by the above process. At this point, the power may not be adjusted, and the traversal process is cycled again after the preset number of traversals of the real-time oscillation frequency are completed in each power cycle.

In an embodiment, as shown in fig. 3, the operation control method of an electromagnetic heating apparatus according to the present invention further includes:

S1A, randomly generating a reference pulse in the pot detection process of the electromagnetic heating equipment;

S2A, generating a pulse fluctuation threshold value according to the reference pulse, wherein the pulse fluctuation threshold value is smaller than the pulse width of the reference pulse;

S3A, generating one or more real-time pulses according to the reference pulse and the pulse fluctuation threshold value, wherein the absolute value of the pulse width difference between the real-time pulses and the reference pulse is smaller than the pulse fluctuation threshold value;

and S4A, driving the electromagnetic heating module to generate a pot detection signal according to one or more real-time pulses so as to obtain a pot detection feedback signal.

Specifically, before the electromagnetic heating device is heated, it usually detects the pan status of the electromagnetic heating device. Specifically, in the pot detection process, the electromagnetic heating equipment is driven to randomly generate a reference pulse, and a fluctuation range is generated according to the reference pulse. The pulse width range of the generated pulse, i.e., the pulse width of the generated pulse not exceeding twice the pulse width of the reference pulse, can be set by this fluctuation range. After setting the range of widths of the pulses that can be generated, it can generate real-time pulses according to the range. The pulse width of the real-time pulse does not exceed a range limited by a pulse fluctuation threshold. And finally, driving the electromagnetic heating module to generate a corresponding pot detection signal by the real-time pulse, and acquiring a pot detection feedback signal according to the pot detection signal so as to finally acquire a pot detection result of the pot.

Optionally, in step S3A, generating one or more real-time pulses according to the reference pulse and the pulse fluctuation threshold includes: sequentially generating a plurality of real-time pulses corresponding to the reference pulses in a third preset step; in step S4A, the driving the electromagnetic heating module to generate a pan detection signal according to the real-time pulse to obtain a pan detection feedback signal includes: and the electromagnetic heating module is driven to generate pot detection signals in sequence according to the real-time pulses. Specifically, the generated real-time pulses may be a plurality of real-time pulses, which may be sequentially generated according to a certain step, and when the electromagnetic heating module detects the pot, the electromagnetic heating module sequentially generates pot detection signals according to the plurality of real-time pulses.

Optionally, a plurality of real-time pulses are sequentially generated in a third preset step; the method comprises the following steps: sequentially generating a plurality of real-time pulses according to the sequence from small to large; or a plurality of real-time pulses are generated in sequence from large to small. That is, the pulses generated in real time may be generated in order from small to large or from large to small. The sequence of the electromagnetic heating module for generating the corresponding pot detection signals can be generated according to the generation sequence of the real-time pulses.

In one embodiment, the electromagnetic heating module first outputs a first pulse, i.e., a reference pulse, having a positive bandwidth P and a duty cycle Q%. And generating a real-time pulse according to the reference pulse, wherein the width value range of the real-time pulse is P +/-S, and the duty ratio is Q%, wherein the value of S satisfies 0< S < P. The pot detection pulse is composed of a series of real-time pulses, the oscillation positive frequency width of the real-time pulses is increased from (P-S) to (P + S) or decreased from (P + S) to (P-S), and one pot detection period is completed after all the real-time pulses are traversed. Where the unit of the pulse width may be uS. The pot detection process can adopt one pot detection period or a plurality of pot detection period combinations with the same pot detection period or a plurality of pot detection period combinations with different parameters. The pot detection pulse obtained by the process does not have fixed frequency. The pot detection device is triggered by adopting an indefinite pulse width and an indefinite frequency, and can avoid electromagnetic interference in the continuous pot detection process in a pot-free state.

Optionally, the method for controlling the operation of the electromagnetic heating device further includes: S5A, judging whether the pan is normal according to the pan detection feedback signal, if so, executing step S1, otherwise, executing step S1A or step S4A. Specifically, in the pot detection process, the next operation can be performed according to the pot detection result. When the pot is detected to be normal, the pot can enter a heating state, namely, the target power of the electromagnetic heating module is obtained, and the electromagnetic heating module is driven to work according to the step S2 and the following steps. When the pot detection device detects that the pot is abnormal, the pot detection device can continuously generate a pot detection signal. The process of continuously generating the pot detection signal can be to regenerate the reference pulse and regenerate the real-time pulse according to the new reference pulse so as to generate the corresponding pot detection signal. The pot detection system can also regenerate the real-time pulse according to the old reference pulse, generate the corresponding pot detection signal according to the real-time pulse, and can also regenerate the generated real-time pulse to directly regenerate the pot detection signal according to the real-time pulse, and the pot detection result can be obtained through the circulation. Either passing or failing. When the number of times of non-passing reaches a certain preset value, the pot detection process can be ended.

As shown in fig. 4, an electromagnetic heating apparatus heating control device of the present invention includes:

a first obtaining unit 110, configured to obtain a target power of the electromagnetic heating module;

the second obtaining unit 120 is configured to obtain a target oscillation frequency of the corresponding electromagnetic heating module according to the target power;

a first execution unit 130, configured to generate a corresponding frequency fluctuation threshold according to the target oscillation frequency, where the frequency fluctuation threshold is smaller than the target oscillation frequency;

a second executing unit 140, configured to obtain one or more real-time oscillation frequencies corresponding to a target oscillation frequency according to the target oscillation frequency and a frequency fluctuation threshold, where an absolute value of a frequency difference between the real-time oscillation frequency and the target oscillation frequency is smaller than the frequency fluctuation threshold;

and a driving unit 150 for driving the electromagnetic heating module to operate at one or more real-time oscillation frequencies.

In an embodiment, as shown in fig. 5, a heating control device of an electromagnetic heating apparatus of the present invention further includes:

the first triggering unit 210 is configured to randomly generate a reference pulse in a pot detection process of the electromagnetic heating device;

a second trigger unit 220, configured to generate a pulse fluctuation threshold according to the reference pulse, where the pulse fluctuation threshold is smaller than a pulse width of the reference pulse;

a third trigger unit 230, configured to generate one or more real-time pulses according to the reference pulse and a pulse fluctuation threshold, where an absolute value of a pulse width difference between the real-time pulse and the reference pulse is smaller than the pulse fluctuation threshold;

and the fourth trigger unit 240 is configured to drive the electromagnetic heating module to generate a pan detection signal according to one or more real-time pulses to obtain a pan detection feedback signal.

In one embodiment, a heating control device of an electromagnetic heating apparatus of the present invention further includes:

the determining unit 250 is configured to determine whether the pot is normal according to the pot detection feedback signal, and drive the first obtaining unit 110 to operate when a positive result is output, and drive the first triggering unit 210 to continue to operate or drive the fourth triggering unit to operate when a negative result is output.

Specifically, for a specific coordination operation process among the units of the electromagnetic heating device heating control apparatus, reference may be made to the electromagnetic heating device heating control method, which is not described herein again.

It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and various changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.