CN205408198U - Electromagnetic heating cooks device and heating control circuit thereof - Google Patents

Abstract

The utility model discloses an electromagnetic heating cooking device and its heating control circuit. The heating control circuit comprises: a main resonant heating module, which includes a heating coil, a resonant capacitor and a resonant switch tube; It is direct current; a filter module; a drive module, which is connected with the control pole of the resonant switch tube to drive the resonant switch tube to be turned on or off; an auxiliary heating module connected to the output terminal of the rectifier module; a zero-crossing detection module, used to detect AC The zero crossing point of the power supply to generate a zero crossing signal; the control module, the control module controls the auxiliary heating module to perform heating and discharging work according to the first zero crossing point in the zero crossing signal, and then outputs the driving control signal according to the second zero crossing point in the zero crossing signal To the driving module to control the main resonant heating module to perform heating work, thereby reducing the C-pole voltage of the resonant switch tube such as the IGBT tube, reducing the inrush current of the resonant switch tube, and preventing damage to the resonant switch tube.

Description

Electromagnetic heating cooking device and its heating control circuit

technical field

The utility model relates to the technical field of electrical appliances, in particular to a heating control circuit of an electromagnetic heating cooking device and an electromagnetic heating cooking device.

Background technique

An electromagnetic heating cooking device in the related art, such as an electromagnetic rice cooker, performs resonant heating by controlling the resonant switch tube to be turned on or off. However, the disadvantage of the related technology is that due to the existence of the filter capacitor, the rectified and filtered DC voltage will be 1.4 times of the AC voltage. Therefore, when the resonance heating is started, there is a phenomenon that the resonance switch tube is hard turned on, which will cause resonance The surge current of the switching tube is too large, which may easily cause damage to the resonant switching tube. Therefore, related technologies need to be improved.

Utility model content

The utility model aims to solve one of the technical problems in the related art at least to a certain extent. Therefore, an object of the present invention is to provide a heating control circuit of an electromagnetic heating cooking device, which can reduce the inrush current passing through the resonant switch tube when the resonant heating is started.

Another purpose of the utility model is to provide an electromagnetic heating cooking device.

In order to achieve the above object, a heating control circuit of an electromagnetic heating cooking device proposed by the present utility model includes: a main resonant heating module, the main resonant heating module includes a heating coil, a resonant capacitor and a resonant switch tube; a rectification module, The rectification module converts the alternating current provided by the alternating current power supply into direct current; the filtering module, the input end of the filtering module is connected to the output end of the rectifying module, the output end of the filtering module is connected to the main resonant heating module, The filtering module performs filtering processing on the direct current, and supplies the filtered direct current to the main resonant heating module; a driving module, the driving module is connected to the control pole of the resonant switch tube to drive the resonant switch The opening or closing of the tube; the auxiliary heating module, the auxiliary heating module is connected with the output terminal of the rectification module; the zero-crossing detection module, the zero-crossing detection module is used to detect the zero-crossing point of the AC power supply to generate a crossover zero signal; a control module, the control module is respectively connected with the zero-crossing detection module, the auxiliary heating module and the driving module, and the control module controls the first zero-crossing point in the zero-crossing signal After the auxiliary heating module performs heating and discharging work, it outputs a driving control signal to the driving module according to the second zero-crossing point of the zero-crossing signal to control the main resonant heating module to perform heating work.

According to the heating control circuit of the electromagnetic heating cooking device proposed by the utility model, the auxiliary heating module is connected to the output end of the rectification module, and the zero-crossing point of the AC power supply is detected by the zero-crossing detection module to generate a zero-crossing signal. After the first zero-crossing point controls the auxiliary heating module to perform heating and discharging work, it outputs a driving control signal to the driving module according to the second zero-crossing point in the zero-crossing signal to control the main resonant heating module to perform heating work. Therefore, before the main resonant heating module is started, the auxiliary heating module is pre-controlled to heat and discharge, thereby reducing the C-pole voltage of the resonant switch tube such as an IGBT tube, reducing the surge current passing through the resonant switch tube when the main resonant heating module is started, and preventing damage to the resonant switch. Tube.

Specifically, the auxiliary heating module includes: a first heating unit, one end of the first heating unit is connected to the output end of the rectification module; a first driving unit, the first driving unit is connected to the first heating unit The other end of the unit is connected to drive the first heating unit; wherein, the control module is connected to the control end of the first driving unit to control the first heating unit to heat or stop heating.

More specifically, the first drive unit includes: a first resistor, one end of the first resistor is connected to the control module; a first switch tube, the base of the first switch tube is connected to the first resistor connected to the other end of the first switching tube, the collector of the first switching tube is connected to the preset power supply; the second resistor, one end of the second resistor is connected to the emitter of the first switching tube; the third resistor, the first switching tube One end of the three resistors and the other end of the second resistor are grounded, the other end of the third resistor is grounded, and there is a first node between the second resistor and the third resistor; the second switch tube, the The base of the second switch tube is connected to the first node, the collector of the second switch tube is connected to the other end of the first heating unit, and the emitter of the second switch tube is grounded.

Specifically, the auxiliary heating module further includes: a second heating unit, one end of the second heating unit is respectively connected to the output end of the rectification module and one end of the first heating unit; a second driving unit, the The second driving unit is connected to the other end of the second heating unit to drive the second heating unit; wherein, the control module is connected to the control terminal of the second driving unit to control the second heating The unit heats up or stops heating.

More specifically, the second drive unit includes: a fourth resistor, one end of the fourth resistor is connected to the control module; a third switch tube, the base of the third switch tube is connected to the fourth resistor connected to the other end of the third switching tube, the collector of the third switching tube is connected to the preset power supply; the fifth resistor, one end of the fifth resistor is connected to the emitter of the third switching tube; the sixth resistor, the first One end of the six resistors and the other end of the fifth resistor are grounded, the other end of the sixth resistor is grounded, and there is a second node between the fifth resistor and the sixth resistor; the fourth switch tube, the The base of the fourth switch tube is connected to the second node, the collector of the fourth switch tube is connected to the other end of the second heating unit, and the emitter of the fourth switch tube is grounded.

Specifically, the first heating unit is arranged on the top of the electromagnetic heating cooking device, and the second heating unit is arranged on the side wall of the electromagnetic heating cooking device.

Specifically, both the first heating unit and the second heating unit are heating resistance wires.

Specifically, the first zero-crossing point and the second zero-crossing point are located within the same half-wave cycle of the alternating current.

In order to achieve the above purpose, another aspect of the utility model provides an electromagnetic heating cooking device, including the heating control circuit of the electromagnetic heating cooking device.

According to the electromagnetic heating cooking device proposed by the utility model, through the heating control circuit of the above-mentioned electromagnetic heating cooking device, the C pole voltage of the resonant switch tube such as the IGBT tube can be reduced, and the inrush current passing through the resonant switch tube when the main resonant heating module is started can be reduced. , to prevent damage to the resonant switching tube.

Description of drawings

1 is a schematic block diagram of a heating control circuit of an electromagnetic heating cooking device according to an embodiment of the present invention;

Fig. 2 is a schematic diagram of the circuit principle of the heating control circuit of the electromagnetic heating cooking device according to an embodiment of the present invention;

Fig. 3 is a schematic diagram of the circuit principle of the heating control circuit of the electromagnetic heating cooking device according to a specific embodiment of the present invention;

Fig. 4 is a schematic diagram of the control waveform of the heating control circuit of the electromagnetic heating cooking device according to a specific embodiment of the present invention; and

Fig. 5 is a flow chart of the control method of the heating control circuit of the electromagnetic heating cooking device according to the embodiment of the present utility model.

Reference signs:

Main resonance heating module 10, rectification module 20, filter module 30, drive module 40, auxiliary heating module 50, zero-crossing detection module 60 and control module 70;

Fuse F1, varistor MOV, filter inductor L1, filter capacitor C1, heating coil L2, resonant capacitor C2, resonant switch tube 11;

The first heating unit 51, the first driving unit 52, the first resistor R1, the first switching tube Q1, the second resistor R2, the third resistor R3 and the second switching tube Q2;

The second heating unit 53 , the second driving unit 54 , the fourth resistor R4 , the third switch tube Q3 , the fifth resistor R5 , the sixth resistor R6 and the fourth switch tube Q4 .

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention, but should not be construed as limiting the present invention.

The following describes the heating control circuit of the electromagnetic heating cooking device, the electromagnetic heating cooking device and the control method of the heating control circuit of the electromagnetic heating cooking device proposed by the embodiments of the present invention with reference to the accompanying drawings.

Fig. 1 is a schematic block diagram of a heating control circuit of an electromagnetic heating cooking device according to an embodiment of the present invention. As shown in FIG. 1 , the heating control circuit of the electromagnetic heating cooking device includes: a main resonance heating module 10 , a rectification module 20 , a filtering module 30 , a driving module 40 , an auxiliary heating module 50 , a zero-crossing detection module 60 and a control module 70 .

Wherein, the main resonant heating module 10 includes a heating coil, a resonant capacitor and a resonant switch tube. Specifically, the heating coil and the resonant capacitor resonate and generate a periodically changing magnetic field when the resonant switch tube is turned on or off. At the bottom of the pot, eddy currents are generated at the bottom of the pot and heat is generated at the same time, so that the main resonant heating module 10 performs electromagnetic resonance heating on the pot. According to a specific example of the present invention, the resonant switch tube may be a high-voltage triode, a MOSFET tube, or an IGBT tube.

The rectifier module 20 converts the alternating current provided by the alternating current power supply into direct current; the input terminal of the filter module 30 is connected with the output terminal of the rectifier module 20, the output terminal of the filter module 30 is connected with the main resonant heating module 10, and the filter module 30 filters the direct current , and supply the filtered direct current to the main resonant heating module 10 .

The drive module 40 is connected to the control pole of the resonant switch tube to drive the resonant switch tube to be turned on or off; the auxiliary heating module 50 is connected to the output terminal of the rectifier module 20; the zero-crossing detection module 60 is used to detect the zero-crossing point of the AC power supply to generate Zero-crossing signal, such as zero-crossing detection module 60 can detect the voltage zero-crossing point of alternating current to generate zero-crossing signal; Control module 70 is connected with zero-crossing detection module 60, auxiliary heating module 50 and drive module 40 respectively, and control module 70 The first zero-crossing point in the signal controls the auxiliary heating module 50 to perform heating and discharging work, and then outputs a driving control signal to the driving module 40 according to the second zero-crossing point in the zero-crossing signal to control the main resonant heating module 10 to perform heating work.

According to an embodiment of the present invention, the first zero-crossing point and the second zero-crossing point may be located in the same half-wave cycle of the alternating current, in other words, the first zero-crossing point and the second zero-crossing point are two adjacent zero-crossing points. As shown in FIG. 4 , the previous zero-crossing point in the half-wave period T is the first zero-crossing point, and the last zero-crossing point in the half-wave period T is the second zero-crossing point. It should be understood that the first zero-crossing point and the second zero-crossing point may also be located in different half-wave periods, in other words, there may be at least one zero-crossing point between the first zero-crossing point and the second zero-crossing point.

Specifically, before the main resonant heating module 10 is started, the zero-crossing point of the alternating current is detected by the zero-crossing detection module 60, and a zero-crossing signal is output to the control module 70 when the instantaneous value of the alternating current is zero-crossing, and the control module 70 receives the first When a zero-crossing signal is detected, it is judged that the first zero-crossing point is detected. At this time, the control module 70 controls the auxiliary heating module 50 to pre-heat, and the filtering module 30 discharges through the auxiliary heating module 50, so that the filtered voltage is, for example, point A in FIG. 2 The voltage of the resonant switching tube, such as the IGBT tube, decreases, and the C-pole voltage of the resonant switching tube, such as the IGBT tube, decreases, so that the inrush current through the resonant switching tube, such as the IGBT tube, decreases when the resonant heating is started. Afterwards, when the control module 70 receives the second zero-crossing signal, it judges that the second zero-crossing point has been detected. At this time, the control module 70 immediately outputs a driving control signal such as a PPG pulse signal to the driving module 40. The control signal drives the resonant switch tube to turn on or off, so as to control the main resonant heating module 10 to perform electromagnetic heating, and at the same time, the control module 70 controls the auxiliary heating module 50 to stop heating.

Therefore, the heating control circuit of the electromagnetic heating cooking device proposed by the embodiment of the utility model pre-controls the heating and discharging of the auxiliary heating module before the main resonant heating module is started, thereby reducing the C pole voltage of the resonant switching tube such as an IGBT tube and reducing the main resonance. The inrush current passing through the resonant switch tube when the heating module is started prevents damage to the resonant switch tube.

The circuit structure and working principle of the heating control circuit of the electromagnetic heating cooking device according to the embodiment of the present invention will be described below in conjunction with accompanying drawings 2-4.

According to an embodiment of the present invention, as shown in Figures 2 and 3, the rectification module 20 has a first input terminal and a second input terminal, and the first input terminal of the rectification module 20 is connected to the live wire L of the AC power supply through a fuse F1, The second input end of the rectification module 20 is connected to the neutral line N of the AC power supply, wherein the piezoresistor MOV is connected in parallel between the first input end and the second input end of the rectification module 20 .

The rectifier module 20 has a first output terminal and a second output terminal, the second output terminal of the rectifier module 20 is grounded, the filter module 30 includes a filter inductor L1 and a filter capacitor C1, one end of the filter inductor L1 is connected to the first output terminal of the rectifier module 20 One end of the filter capacitor C1 is connected to the other end of the filter inductor L1, the other end of the filter capacitor C1 is grounded, and there is a third node A between the filter inductor L1 and the filter capacitor C1.

According to an embodiment of the present invention, as shown in Figures 2 and 3, the heating coil L2 and the resonant capacitor C2 are connected in parallel, one end of the parallel connected heating coil L2 and the resonant capacitor C2 is connected to the third node A, and the resonant switch tube One end of 11, such as the C pole of the IGBT tube, is connected to the other end of the parallel heating coil L2 and the resonant capacitor C2, the other end of the resonant switch tube 11, such as the E pole of the IGBT tube, is grounded, and the control terminal of the resonant switch tube 11, such as the IGBT tube The G pole is connected to the driving module 40 .

According to an embodiment of the present invention, as shown in FIGS. 2 and 3 , the auxiliary heating module 50 includes: a first heating unit 51 and a first driving unit 52 . Wherein, one end of the first heating unit 51 is connected to the output end of the rectification module 20, that is, the first output end; the first drive unit 52 is connected to the other end of the first heating unit 51 to drive the first heating unit 51; the control module 70 is connected to the first output end of the first heating unit 51; The control terminal of the first driving unit 52 is connected to control the first heating unit 51 to heat or stop heating.

That is to say, when the control module 70 controls the first driving unit 52 to turn on, the first heating unit 51 performs heating and discharging; when the control module 70 controls the first driving unit 52 to turn off, the first heating unit 51 stops heating.

Specifically, as shown in FIG. 3 , the first driving unit 52 includes: a first resistor R1 , a first switch tube Q1 , a second resistor R2 , a third resistor R3 and a second switch tube Q2 .

Wherein, one end of the first resistor R1 is connected to the control module 70; the base of the first switching tube Q1 is connected to the other end of the first resistor R1, and the collector of the first switching tube Q1 is connected to the preset power supply VDD; the second resistor One end of R2 is connected to the emitter of the first switch tube Q1; one end of the third resistor R3 is grounded to the other end of the second resistor R2, and the other end of the third resistor R3 is grounded; between the second resistor R2 and the third resistor R3 It has a first node; the base of the second switching tube Q2 is connected to the first node, the collector of the second switching tube Q2 is connected to the other end of the first heating unit 51 , and the emitter of the second switching tube Q2 is grounded.

According to an embodiment of the present invention, as shown in FIGS. 2 and 3 , the auxiliary heating module 52 may further include: a second heating unit 53 and a second driving unit 54 .

Wherein, one end of the second heating unit 54 is respectively connected with the output end of the rectification module 20, that is, the first output end and an end of the first heating unit 51; the second driving unit 54 is connected with the other end of the second heating unit 53 to drive The second heating unit 53 ; the control module 70 is connected with the control terminal of the second driving unit 54 to control the second heating unit 53 to heat or stop heating.

That is to say, when the control module 70 controls the second driving unit 54 to turn on, the second heating unit 53 performs heating and discharging; when the control module 70 controls the second driving unit 54 to turn off, the second heating unit 53 stops heating.

Specifically, as shown in FIG. 3 , the second driving unit 54 includes: a fourth resistor R4 , a third switch tube Q3 , a fifth resistor R5 , a sixth resistor R6 and a fourth switch tube Q4 .

Wherein, one end of the fourth resistor R4 is connected to the control module 70; the base of the third switching tube Q3 is connected to the other end of the fourth resistor R4, and the collector of the third switching tube Q3 is connected to the preset power supply VDD; the fifth resistor One end of R5 is connected to the emitter of the third switch tube Q3; one end of the sixth resistor R6 is grounded to the other end of the fifth resistor R5, the other end of the sixth resistor R6 is grounded, and the fifth resistor R5 and the sixth resistor R6 are connected to each other. It has a second node; the base of the fourth switching tube Q4 is connected to the second node, the collector of the fourth switching tube Q4 is connected to the other end of the second heating unit 53 , and the emitter of the fourth switching tube Q4 is grounded.

Specifically, before the main resonant heating module 10 is controlled to start, the auxiliary heating module 50 is controlled in advance to perform heating. As shown in Figure 4, at the previous zero-crossing point of the half-wave cycle, the zero-crossing detection module 60 outputs the first zero-crossing signal to the control module 70, and the control module 70 judges that the first zero-crossing point is detected, and passes the first port B output a high-level signal to the first drive unit 52, and output a high-level signal to the second drive unit 54 through the second port C, so that the first switch tube Q1 and the third switch tube Q3 are turned on, and the first switch tube After Q1 and the third switch tube Q3 are turned on, the second switch tube Q2 and the fourth switch tube Q4 are turned on, the first heating unit 51 and the second heating unit 52 perform heating and discharging work, the voltage at point A gradually decreases, and the IGBT tube The C pole voltage drops accordingly. At the last zero-crossing point of the half-wave cycle, the zero-crossing detection module 60 outputs a second zero-crossing signal to the control module 70, and the control module 70 judges that the second zero-crossing point is detected, and outputs a driving control signal such as PPG through the third port D The pulse signal is sent to the drive module 40, and the drive module 40 drives the resonant switch tube 11 to work. At this time, the voltage at point A drops below the preset voltage threshold, thereby reducing the inrush current through the resonant switch tube when the main resonant heating module 10 is started, and at the same time Output a low-level signal to the first drive unit 52 through the first port B, and output a low-level signal to the second drive unit 54 through the second port C, so that the first switching tube Q1, the second switching tube Q2, and the second switching tube Q2 The third switching tube Q3 and the fourth switching tube Q4 are turned off, and the first heating unit 51 and the second heating unit 52 stop heating.

According to an embodiment of the present invention, the first heating unit 51 can be arranged on the top of the electromagnetic heating cooking device, and the second heating unit 53 can be arranged on the side wall of the electromagnetic heating cooking device. Specifically, both the first heating unit 51 and the second heating unit 53 are heating resistance wires.

In summary, according to the heating control circuit of the electromagnetic heating cooking device proposed by the embodiment of the present invention, the auxiliary heating module is connected to the output terminal of the rectifier module, and the zero-crossing point of the AC power supply is detected by the zero-crossing detection module to generate a zero-crossing signal, and the control module After controlling the auxiliary heating module to perform heating and discharging work according to the first zero-crossing point in the zero-crossing signal, output a driving control signal to the driving module according to the second zero-crossing point in the zero-crossing signal to control the main resonant heating module to perform heating work. Therefore, before the main resonant heating module is started, the auxiliary heating module is pre-controlled to heat and discharge, thereby reducing the C-pole voltage of the resonant switch tube such as an IGBT tube, reducing the surge current passing through the resonant switch tube when the main resonant heating module is started, and preventing damage to the resonant switch. Tube.

The embodiment of the utility model also provides an electromagnetic heating cooking device, which includes the above-mentioned heating control circuit of the electromagnetic heating cooking device.

According to the electromagnetic heating cooking device proposed in the embodiment of the present invention, the heating control circuit of the above-mentioned electromagnetic heating cooking device can reduce the C pole voltage of the resonant switch tube such as the IGBT tube, and reduce the voltage of the resonant switch tube when the main resonant heating module is started. Inrush current to prevent damage to the resonant switching tube.

The embodiment of the utility model further proposes a method for controlling the heating control circuit of the electromagnetic heating cooking device.

Fig. 5 is a flow chart of the control method of the heating control circuit of the electromagnetic heating cooking device according to the embodiment of the present utility model. As shown in Figure 5, the method includes the following steps:

S1: Detects the zero-crossing point of the AC power supply to generate a zero-crossing signal.

S2: After controlling the auxiliary heating module to perform heating and discharging work according to the first zero-crossing point in the zero-crossing signal, output a driving control signal to the driving module according to the second zero-crossing point in the zero-crossing signal to control the main resonant heating module to perform heating work.

According to an embodiment of the present invention, the first zero-crossing point and the second zero-crossing point are located within the same half-wave cycle of the alternating current provided by the alternating current power supply.

To sum up, according to the control method of the heating control circuit of the electromagnetic heating cooking device proposed by the embodiment of the present invention, the zero-crossing point of the AC power supply is detected to generate a zero-crossing signal, and then the auxiliary power is controlled according to the first zero-crossing point in the zero-crossing signal. After the heating module performs heating and discharging work, it outputs a driving control signal to the driving module according to the second zero-crossing point of the zero-crossing signal to control the main resonant heating module to perform heating work. Therefore, before the main resonant heating module is started, the auxiliary heating module is pre-controlled to heat and discharge, thereby reducing the C-pole voltage of the resonant switch tube such as an IGBT tube, reducing the surge current passing through the resonant switch tube when the main resonant heating module is started, and preventing damage to the resonant switch. Tube.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial" The orientation or positional relationship indicated by , "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying the referred device Or elements must have a specific orientation, be constructed and operate in a specific orientation, and thus should not be construed as limiting the invention.

In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In the description of the present utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

In this utility model, unless otherwise specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrated; may be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediary, and may be an internal communication between two elements or an interactive relationship between two elements, unless otherwise stated Clearly defined. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model according to specific situations.

In the present invention, unless otherwise clearly specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature through an intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

Although the embodiments of the present invention have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and should not be construed as limitations of the present invention, and those skilled in the art are within the scope of the present invention. Variations, modifications, substitutions and variations can be made to the above-described embodiments.

Claims (9)

1. A heating control circuit of an electromagnetic heating cooking device, characterized in that, comprising: A main resonant heating module, the main resonant heating module includes a heating coil, a resonant capacitor and a resonant switch tube; a rectification module, the rectification module converts the alternating current provided by the alternating current power supply into direct current; A filter module, the input end of the filter module is connected to the output end of the rectification module, the output end of the filter module is connected to the main resonant heating module, the filter module filters the direct current, and The filtered direct current is supplied to the main resonant heating module; A drive module, the drive module is connected to the control pole of the resonant switch tube to drive the resonant switch tube to be turned on or off; an auxiliary heating module, the auxiliary heating module is connected to the output end of the rectification module; A zero-crossing detection module, the zero-crossing detection module is used to detect the zero-crossing point of the AC power supply to generate a zero-crossing signal; A control module, the control module is respectively connected to the zero-crossing detection module, the auxiliary heating module and the driving module, and the control module controls the auxiliary heating module according to the first zero-crossing point in the zero-crossing signal After the heating and discharging work is performed, a driving control signal is output to the driving module according to the second zero-crossing point of the zero-crossing signal to control the main resonant heating module to perform heating work. 2. The heating control circuit of the electromagnetic heating cooking device according to claim 1, wherein the auxiliary heating module comprises: a first heating unit, one end of the first heating unit is connected to the output end of the rectification module; a first driving unit, the first driving unit is connected to the other end of the first heating unit to drive the first heating unit; Wherein, the control module is connected with the control terminal of the first driving unit to control the first heating unit to heat or stop heating. 3. The heating control circuit of the electromagnetic heating cooking device according to claim 2, wherein the first drive unit comprises: a first resistor, one end of the first resistor is connected to the control module; a first switching tube, the base of the first switching tube is connected to the other end of the first resistor, and the collector of the first switching tube is connected to a preset power supply; a second resistor, one end of the second resistor is connected to the emitter of the first switch tube; a third resistor, one end of the third resistor is grounded to the other end of the second resistor, the other end of the third resistor is grounded, and there is a first node between the second resistor and the third resistor; The second switching tube, the base of the second switching tube is connected to the first node, the collector of the second switching tube is connected to the other end of the first heating unit, and the second switching tube is connected to the other end of the first heating unit. The emitter is grounded. 4. The heating control circuit of the electromagnetic heating cooking device according to claim 2, wherein the auxiliary heating module further comprises: a second heating unit, one end of the second heating unit is respectively connected to the output end of the rectification module and one end of the first heating unit; a second driving unit, the second driving unit is connected to the other end of the second heating unit to drive the second heating unit; Wherein, the control module is connected with the control terminal of the second driving unit to control the second heating unit to heat or stop heating. 5. The heating control circuit of the electromagnetic heating cooking device according to claim 4, wherein the second drive unit comprises: A fourth resistor, one end of the fourth resistor is connected to the control module; a third switching tube, the base of the third switching tube is connected to the other end of the fourth resistor, and the collector of the third switching tube is connected to a preset power supply; a fifth resistor, one end of the fifth resistor is connected to the emitter of the third switch tube; A sixth resistor, one end of the sixth resistor and the other end of the fifth resistor are grounded, the other end of the sixth resistor is grounded, and there is a second node between the fifth resistor and the sixth resistor; A fourth switch tube, the base of the fourth switch tube is connected to the second node, the collector of the fourth switch tube is connected to the other end of the second heating unit, and the fourth switch tube The emitter is grounded. 6. The heating control circuit of the electromagnetic heating cooking device according to claim 4, wherein the first heating unit is arranged on the top of the electromagnetic heating cooking device, and the second heating unit is arranged on the electromagnetic heating cooking device. Heat the side walls of the cooking appliance. 7. The heating control circuit of the electromagnetic heating cooking device according to claim 4, wherein the first heating unit and the second heating unit are heating resistance wires. 8 . The heating control circuit of the electromagnetic heating cooking device according to claim 1 , wherein the first zero-crossing point and the second zero-crossing point are located within the same half-wave cycle of the alternating current. 9. An electromagnetic heating cooking device, characterized by comprising a heating control circuit of the electromagnetic heating cooking device according to any one of claims 1-8.