CN204462926U - Power regulation circuit and cooking appliance for resistance hot plate - Google Patents

Abstract

The utility model provides power conditioning circuitry and the cooking apparatus of a kind of resistance-type heat dish, wherein, the power conditioning circuitry of resistance-type heat dish, comprising: power module, the input end of described power module is connected with fuse component; The hot disk module of resistance-type, comprise at least one resistance-type heat dish and auxiliary electrical resistive heat dish, the hot disk module of described resistance-type is connected to described power module; Power driver module, is connected to the hot disk module of described resistance-type; Sampling module, is connected to described power module; Microprocessor, be connected to described power driver module and described sampling module, described microprocessor controls the duty of described power driver module to regulate the bearing power of the power of the hot disk module of described resistance-type and described auxiliary electrical resistive heat dish in real time according to described power supply signal.By technical solutions of the utility model, achieve microprocessor controls power driver module effect according to the output signal of sampling module, increase the power bracket of the hot disk module of resistance-type.

Description

Power regulation circuit and cooking appliance for resistance hot plate

technical field

The utility model relates to the technical field of cooking utensils, in particular to a power regulating circuit of a resistance heating plate and a cooking utensil.

Background technique

In the related art, during the working process of a cooking appliance equipped with a resistance heating plate, the working time of the resistance heating plate is usually controlled by a relay, and then the average power of the resistance heating plate is determined, but the above-mentioned control method and circuit structure There are the following disadvantages:

(1) When the resistive hot plate is controlled by the relay, since the relay is mechanically controlled, the switching process is relatively slow, and precise control of the resistive hot plate cannot be realized;

(2) When some relays are controlled by a drive circuit, the turn-off process of the relay can only be adjusted by adjusting the turn-off time of the drive circuit, so as to determine the average power of the resistive hot plate.

Therefore, how to design a power regulation circuit capable of real-time regulation of the resistance heating plate to achieve the effect of real-time adjustable heating power of the cooking utensil has become an urgent technical problem to be solved.

Utility model content

The utility model aims at at least solving one of the technical problems existing in the prior art or the related art.

Therefore, an object of the present utility model is to provide a power regulating circuit of a resistive hot plate.

Another object of the utility model is to provide a cooking utensil.

In order to achieve the above object, according to the embodiment of the first aspect of the utility model, a power regulation circuit of a resistive hot plate is proposed, including: a power supply module; a resistive hot plate module, including at least one resistive hot plate and an auxiliary A resistive hot plate, the resistive hot plate module is connected to the power module; a power drive module is connected to the resistive hot plate module, and the power drive module is used to control whether the resistive hot plate module is heating; a sampling module, connected to the power supply module, and the sampling module is used to sample the power supply signal of the power supply module; a microprocessor, connected to the power drive module and the sampling module, and the microprocessor The controller controls the working state of the power drive module according to the power supply signal to adjust the power of the resistive hot plate module and the load power of the auxiliary resistive hot plate in real time.

According to the power regulating circuit of the resistive hot plate of the embodiment of the present invention, by sequentially connecting the power supply module, the resistive hot plate module, the power drive module, the sampling module and the microprocessor, the output of the microprocessor according to the sampling module is realized. The signal controls the effect of the power drive module, and then realizes the real-time feedback and real-time adjustment of the power of the resistance hot plate. In addition, the resistance heat is increased by setting the resistance heat plate and the auxiliary resistance heat plate in the resistance heat plate module. The power range of the hot plate module.

Specifically, when the power supply signal of the power module is loaded on the resistive hot plate module, the resistive hot plate does not work when the power drive module is in the off state, and when the microprocessor outputs a high-level pulse, the power drive module is in the on state The resistance heating plate starts to work, and the power of the resistance heating plate depends on the power supply signal. Therefore, by feeding back the power supply signal to the microprocessor, the power of the last heating process can be determined according to the power supply signal as the reference power, and further based on the reference power And the set working mode determines the power of the current heating process, which realizes the real-time feedback and real-time adjustment of the power.

It is worth pointing out that a comparator is set in the microprocessor, and the trigger signal of the comparator controls the working state of the auxiliary resistive hot plate. Specifically, when the power value set by the user is higher than the rated power of the resistive hot plate The comparator sends out a trigger signal to control the auxiliary resistance heating plate and the resistance heating plate to work at the same time. When the power value set by the user is lower than the rated power of the resistance heat plate, only the resistance heat plate is controlled to work. Therefore, The working power range of the resistance heating plate module is increased through the auxiliary resistance heating plate, which can better meet the heating needs of users.

According to the above-mentioned embodiment of the utility model, the method for detecting whether the coil plate of the cooking utensil is assembled correctly can also have the following technical features:

According to an embodiment of the present invention, the auxiliary resistance heating plate includes: an auxiliary heating resistance wire; an auxiliary heating power drive module connected between the auxiliary heating resistance wire and the microprocessor, and the auxiliary heating The power driving module determines whether to drive the auxiliary heating resistance wire to heat according to the output signal of the microprocessor.

According to the power regulating circuit of the resistance heating disc of the embodiment of the present invention, by setting the auxiliary heating power driving module, the real-time control of the power of the auxiliary resistance heating disc is realized.

Wherein, the microprocessor is provided with a comparator, and the trigger signal of the comparator controls the working state of the auxiliary heating resistance wire. Specifically, when the power value set by the user is higher than the rated power of the resistance heating plate, the comparator sends out a trigger signal , to control the auxiliary heating resistance wire and the resistance heating plate to work at the same time. When the power value set by the user is lower than the rated power of the resistance heating plate, only the resistance heating plate is controlled to work. Therefore, the resistance heating plate module The working power range is increased through the auxiliary heating resistance wire, which can better meet the heating needs of users.

According to an embodiment of the present invention, the auxiliary heating power drive module includes: an auxiliary power switch connected to the microprocessor; a relay unit including at least one relay connected to the auxiliary power switch and the Between the above-mentioned auxiliary heating resistance wires.

According to the power adjustment circuit of the resistance heating plate in the embodiment of the present invention, by setting the auxiliary power switch and the relay unit, the accurate control of the auxiliary heating power drive module is ensured, specifically, through the two-stage auxiliary power switch and the relay unit Series switch control avoids false triggering caused by noise pulses such as signal fluctuations and ripple currents.

According to an embodiment of the present invention, the sampling module includes: a voltage dividing resistor unit, including a first resistor and a second resistor connected in series, and the voltage dividing resistor unit is connected between the power supply module and the ground wire During the interval, the common terminal of the first resistor and the second resistor is connected to the microprocessor as the output terminal of the power supply signal.

According to the power regulation circuit of the resistive hot plate of the embodiment of the present invention, by setting the voltage dividing resistor unit in the sampling module, when the power supply signal is a voltage, through the voltage dividing process of two resistors, it is suitable for the microprocessor to obtain The voltage sampling signal is used to determine the reference power of the next heating process, and the accurate adjustment of the resistance heating plate is realized.

Among them, in consideration of circuit reliability, electrolytic capacitors and bypass capacitors can be added to the voltage divider resistors to avoid the impact of pulse noise such as ripple current on the sampling signal.

According to an embodiment of the present invention, the microprocessor further includes: a temperature control module, including a temperature setting unit and a temperature sensing unit, wherein the temperature setting unit is used to preset the working temperature value, the The temperature sensing unit is used to sense the actual temperature value of the at least one resistive hot plate; the power conversion module is connected to the temperature control module, and the power conversion module is used to operate according to the preset working temperature value and the The difference between the actual temperature values determines the reference power of the resistance heating plate module; the power calculation module is connected to the sampling module and is used to calculate the sampled power supply signal as compensation power.

According to the power regulating circuit of the resistance heating plate of the embodiment of the present invention, by setting the temperature control module, the power conversion module and the power calculation module in the microprocessor, the accurate adjustment of the power of the resistance heating plate is realized.

Specifically, the user can set the expected temperature value (that is, the preset working temperature value) through the temperature setting unit, and the temperature sensing unit senses the actual temperature value of the resistance hot plate in real time, thereby determining the preset working temperature value and The difference of the actual temperature value, and record the sequence generated by the temperature difference at different times, determine the weight value of each temperature value in the temperature difference sequence according to the empirical value, and then generate the weight sum of the temperature difference sequence, The theoretical power value is determined according to the power and weight sum of the previous heating process, then the compensation power is determined according to the power supply signal, and finally the final output power of the resistance heating plate is determined according to the theoretical power value and supplementary power.

It is worth pointing out that after the microprocessor obtains the final output power according to the above method, it needs to convert it into the duty ratio of the bandwidth modulation pulse, and then determine the power of the resistive hot plate under a certain power supply signal.

According to an embodiment of the present invention, the microprocessor includes: a modulation module, the input end of the modulation module is connected to the power conversion module and the power calculation module to determine the duty ratio of the modulation bandwidth pulse, so The output terminal of the modulation module is connected to the power driving module to control the power of the power driving module through the modulation bandwidth pulse.

According to the power adjustment circuit of the resistive hot plate in the embodiment of the present invention, by setting the modulation module in the microprocessor, the accurate adjustment of the power drive module is realized, wherein the fast shut-off and conduction of the power drive module The pass determines the fast switching control of the resistance heating plate.

According to an embodiment of the present invention, the power drive module further includes: a power switch unit, including at least one transistor switch, any one of the at least one transistor switch is connected to one of the resistive hot plates and the ground wire Between, the base of any one of the transistor switches is connected to the output of the microprocessor.

According to the power regulation circuit of the resistive hot plate of the embodiment of the present invention, by setting the transistor switch in the power drive module, and connecting between the output terminal of the microprocessor and the resistive hot plate, the output signal of the microprocessor Control the conduction state of the transistor switch, and then control the power of the resistive hot plate, thereby avoiding the misoperation caused by the fluctuation of the signal, thereby ensuring the reliability of the circuit.

According to an embodiment of the present invention, the power module includes: an input protection circuit, including a neutral wire and a live wire connected to a commercial frequency power supply, and a piezoresistor is connected between the neutral wire and the live wire.

According to the power regulation circuit of the resistive hot plate of the embodiment of the present invention, by setting the input protection circuit and the piezoresistor in the input protection circuit, the voltage limiting and/or current limiting processing of the industrial frequency power supply is realized, and then The reliability of the circuit is guaranteed.

According to an embodiment of the present invention, a protective capacitor is connected between the neutral line and the live line.

According to the power regulating circuit of the resistance heating plate of the embodiment of the present invention, by setting a protection capacitor between the neutral line and the live line, the AC isolation effect is achieved for the industrial frequency power supply, and the reliability of the circuit is further ensured.

According to an embodiment of the present invention, the power supply module further includes: a rectification and filtering circuit connected between the input protection circuit and the resistive hot plate module, and the rectification and filtering module is used for inputting the resistive hot plate The hot plate module performs rectification and filtering processing.

According to the power regulating circuit of the resistance heating plate in the embodiment of the present invention, by setting the rectification and filtering circuit in the power supply module, the unidirectional DC load is conveniently obtained, thereby providing a stable power supply signal for the resistance heating plate.

According to an embodiment of the second aspect of the present invention, a cooking appliance is proposed, comprising: a power adjustment circuit for a resistance hot plate according to any one of the above technical solutions.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

The above and/or additional aspects and advantages of the present utility model will become apparent and easy to understand from the description of the embodiments in conjunction with the following drawings, wherein:

Fig. 1 shows a schematic structural diagram of a power regulation circuit of a resistance heating plate according to an embodiment of the present invention.

Detailed ways

In order to more clearly understand the above purpose, features and advantages of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

Fig. 1 shows a schematic structural diagram of a power regulation circuit of a resistance heating plate according to an embodiment of the present invention.

As shown in Figure 1, according to the power regulation circuit of the resistive hot plate of the embodiment of the present utility model, comprise: power supply module 1; 22. The resistive thermal disc module is connected to the power module 1; the power drive module 3 is connected to the resistive thermal disc module 2, and the power drive module 3 is used to control the resistive thermal disc module 2 Whether heating is performed; the sampling module 4 is connected to the power supply module 1, and the sampling module 4 is used to sample the power supply signal of the power supply module 1; the microprocessor 5 is connected to the power drive module 3 and the The sampling module 4, the microprocessor 5 controls the working state of the power drive module 3 according to the power supply signal to adjust the power of the resistive hot plate 21 and the load power of the auxiliary resistive hot plate 21 in real time .

According to the power regulation circuit of the resistive hot plate of the embodiment of the present utility model, realize the microprocessor 5. According to the output signal of the sampling module 4, the effect of the drive module 3 is controlled, thereby realizing real-time feedback and real-time adjustment of the power of the resistance heating plate 21. In addition, by setting the resistance heating plate in the resistance heating plate module 2 21 and the auxiliary resistive hot plate 22 increase the power range of the resistive hot plate module 2 .

Specifically, when the power supply signal of the power supply module 1 is applied to the resistive hot plate module 21, the resistive hot plate 21 does not work when the power drive module 3 is in an off state, and when the microprocessor 5 outputs a high-level pulse, the power drive When the module 3 is turned on, the resistance heating plate 21 starts to work, and the power of the resistance heating plate 21 depends on the power supply signal. Therefore, by feeding back the power supply signal to the microprocessor 5, the power of the last heating process can be determined according to the power supply signal. As a reference power, and further determine the power of the current heating process according to the reference power and the set working mode, that is, real-time feedback and real-time adjustment of the power are realized.

It is worth pointing out that the microprocessor 5 is provided with a comparator, and the trigger signal of the comparator controls the working state of the auxiliary resistance heating plate 22. Specifically, when the power value set by the user is higher than that of the resistance heating plate 21 At rated power, the comparator sends a trigger signal to control the auxiliary resistance heating plate 22 and the resistance heating plate 21 to work simultaneously. When the power value set by the user is lower than the rated power of the resistance heating plate 21, only the resistance heating plate is controlled. The disk 21 is working. Therefore, the working power range of the resistance heating disk module 2 is increased by the auxiliary resistance heating disk 22, which can better meet the heating needs of users.

According to the above-mentioned embodiment of the utility model, the method for detecting whether the coil plate of the cooking utensil is assembled correctly can also have the following technical features:

According to an embodiment of the present utility model, the auxiliary resistance heating plate 22 includes: an auxiliary heating resistance wire; an auxiliary heating power drive module connected between the auxiliary heating resistance wire and the microprocessor 5, the The auxiliary heating power driving module determines whether to drive the auxiliary heating resistance wire to heat according to the output signal of the microprocessor 5 .

According to the power regulating circuit of the resistance heating disc of the embodiment of the present invention, by setting the auxiliary heating power driving module, the real-time control of the power of the auxiliary resistance heating disc is realized.

Wherein, the microprocessor 5 is provided with a comparator, and the trigger signal of the comparator controls the working state of the auxiliary heating resistance wire. Specifically, when the power value set by the user is higher than the rated power of the resistance heating plate, the comparator sends a trigger signal to control the auxiliary heating resistance wire and the resistance heating plate 21 to work at the same time, and when the power value set by the user is lower than the rated power of the resistance heating plate, only the resistance heating plate 21 is controlled to work. The working power range of the disk module 2 is increased through the auxiliary heating resistance wire, which can better meet the heating needs of users.

According to an embodiment of the present invention, the auxiliary heating power drive module includes: an auxiliary power switch 24 connected to the microprocessor 5; a relay unit including at least one relay 23 connected to the auxiliary power switch 24; Between the power switch 24 and the auxiliary heating resistance wire.

According to the power regulation circuit of the resistance heating plate of the embodiment of the present invention, by setting the auxiliary power switch 24 and the relay unit, the accurate control of the auxiliary heating power drive module is ensured, specifically, through the auxiliary power switch 24 and the relay unit Two-stage series switch control avoids false triggering caused by noise pulses such as signal fluctuations and ripple currents.

In addition, the power regulating circuit of the resistance heating plate according to the above-mentioned embodiments of the present invention may also have the following additional technical features:

According to an embodiment of the present invention, the sampling module 4 includes: a voltage dividing resistor unit, including a first resistor 41 and a second resistor 42 connected in series, and the voltage dividing resistor unit is connected between the power supply module 1 and the Between the ground wires, the common end of the first resistor 41 and the second resistor 42 is connected to the microprocessor 5 as the output end of the power supply signal.

According to the power regulation circuit of the resistive hot plate of the embodiment of the present invention, by arranging the voltage dividing resistor unit in the sampling module 4, when the power supply signal is a voltage, through the voltage dividing process of two resistors, it is suitable for microprocessing. The voltage sampling signal of the device 5 is used to determine the reference power of the next heating process, and the accurate adjustment of the resistance heating plate is realized.

Wherein, in consideration of circuit reliability, an electrolytic capacitor 43 and a bypass capacitor 44 can be added to the voltage dividing resistor to avoid the influence of pulse noise such as ripple current on the sampling signal.

According to an embodiment of the present invention, the microprocessor 5 also includes: a temperature control module (not shown in FIG. 1 ), including a temperature setting unit and a temperature sensing unit, wherein the temperature setting unit uses At the preset working temperature value, the temperature sensing unit is used to sense the actual temperature value of the at least one resistance hot plate; the power conversion module is connected to the temperature control module, and the power conversion module is used to The difference between the preset working temperature value and the actual temperature value determines the reference power of the resistive hot plate module 2; the power calculation module is connected to the sampling module 4 and is used to calculate the sampled power supply signal as compensation power .

According to the power regulating circuit of the resistance heating plate of the embodiment of the present invention, by setting the temperature control module, the power conversion module and the power calculation module in the microprocessor, the accurate adjustment of the power of the resistance heating plate is realized.

Specifically, the user can set the expected temperature value (that is, the preset working temperature value) through the temperature setting unit, and the temperature sensing unit senses the actual temperature value of the resistance hot plate in real time, thereby determining the preset working temperature value and The difference of the actual temperature value, and record the sequence generated by the temperature difference at different times, determine the weight value of each temperature value in the temperature difference sequence according to the empirical value, and then generate the weight sum of the temperature difference sequence, The theoretical power value is determined according to the power and weight sum of the previous heating process, then the compensation power is determined according to the power supply signal, and finally the final output power of the resistance heating plate is determined according to the theoretical power value and supplementary power.

It is worth pointing out that after the microprocessor 5 obtains the final output power according to the above method, it needs to convert it into the duty cycle of the bandwidth modulation pulse, and then determine the power of the resistive heating plate under a certain power supply signal.

According to an embodiment of the present utility model, the microprocessor 5 includes: a modulation module, the input end of the modulation module is connected to the power conversion module and the power calculation module to determine the duty cycle of the modulation bandwidth pulse, The output terminal of the modulation module is connected to the power driving module 3 to control the power of the power driving module 3 through the modulation bandwidth pulse.

According to the power regulation circuit of the resistive hot plate of the embodiment of the present invention, by setting the modulation module in the microprocessor 5, the accurate adjustment to the power drive module 3 is realized, wherein, the fast shutdown of the power drive module 3 The off and on determines that the fast switch control of the resistance heating plate can be carried out.

According to an embodiment of the present invention, the power drive module 3 includes: a power switch unit, including at least one transistor switch 31, and any transistor switch 31 in the at least one transistor switch 31 is connected to one of the resistive hot plates and the ground, the base of any transistor switch 31 is connected to the output terminal of the microprocessor 5 .

According to the power regulation circuit of the resistive hot plate of the embodiment of the present invention, by setting the transistor switch 31 in the power drive module 3, and being connected between the output terminal of the microprocessor 5 and the resistive hot plate, through the microprocessor The output signal of 5 controls the conduction state of the transistor switch 31, and then controls the power of the resistive heating plate to avoid misoperation caused by signal fluctuations, thereby ensuring the reliability of the circuit.

According to an embodiment of the present invention, the power module 1 includes: an input protection circuit, including a neutral wire and a live wire connected to a commercial frequency power supply, and a piezoresistor 11 is connected between the neutral wire and the live wire.

According to the power regulation circuit of the resistive hot plate of the embodiment of the present invention, by setting the input protection circuit and the piezoresistor 11 in the input protection circuit, the voltage limiting and/or current limiting processing of the industrial frequency power supply is realized, Thus, the reliability of the circuit is ensured.

According to an embodiment of the present invention, a protective capacitor 12 is connected between the neutral line and the live line.

According to the power regulating circuit of the resistance heating plate of the embodiment of the present invention, by setting the protection capacitor 12 between the neutral line and the live line, the AC isolation effect is achieved for the industrial frequency power supply, and the reliability of the circuit is further ensured.

According to an embodiment of the present invention, the power supply module 1 further includes: a rectification and filtering circuit connected between the input protection circuit and the resistive hot plate module, and the rectification and filtering module 13 is used for inputting the Resistive hot plate module for rectification and filtering.

According to the power regulation circuit of the resistance heating plate of the embodiment of the present invention, by setting the rectification and filtering circuit 13 in the power module, the unidirectional DC load is conveniently obtained, and then a stable power supply signal is provided for the resistance heating plate.

The calculation process of the power of the cooking appliance according to the present invention will be described in detail with reference to FIG. 1 .

The formula for calculating the power of cooking appliances is:

U(k)=U(k-1)+Kp[E(k)-E(k-1)]+KiE(k)+Kd[E(k)-2E(k-1)+E(k- 2)],

Among them, U(K) refers to the calculated power, U(K-1) refers to the last output power. E(k) refers to the difference between the current measured temperature value and the set temperature value, E(k-1) , E(K-2) refers to the difference between the measured temperature and the set temperature calculated last time and last time, Kp, Ki, Kd are proportional, differential, and integral coefficients, according to the empirical range Kp:1.6-5, Ki: 3-10, Kd: 0.5-3, needs to be adjusted according to different environments and structures. Calculate the corresponding power P _c , because the mains voltage value will vary with different regions, which will have a certain impact on the power of the hot plate. In order to control the temperature more accurately, according to the current mains voltage V corresponding to the power compensation value P _v , P _v =(V-220)*8. The final output power P=P _c -P _v is obtained.

In addition, after the sampling module 4 divides the mains voltage, the terminal between the first resistor 41 and the second resistor 42 is connected to the microprocessor 5. At this time, the power supply signal obtained by the microprocessor 5 is converted into a reference power P _c , in addition, obtain the temperature to be heated T ₁ set by the user, and the temperature of the resistance hob measured by the temperature sensing module is T ₂ , and the temperature difference is obtained as ΔT, and the unprocessed 5 calculates the power theoretical value P according to ΔT _t , so the final determined power is:

P= _Pt - _Pc ,

The microprocessor 5 determines the duty cycle of the bandwidth modulation pulse according to the calculated P, and then controls the real-time power of the resistance heating disc.

When the temperature value set by the user is converted into the theoretical power value by the microprocessor, the theoretical power value is higher than the rated power of the resistance heating plate, and after being judged by the comparator of the microprocessor, the auxiliary power switch is triggered to conduct, and then control The relay in the relay unit is turned on, and the auxiliary resistance heating plate starts to work. At the same time, the microprocessor controls the resistance heating plate to start working, wherein the power of the auxiliary resistance heating plate is the difference between the power theoretical value and the rated power.

The technical scheme of the utility model has been described in detail above in conjunction with the accompanying drawings. Considering the technical problem of how to design a power regulating circuit that can adjust the power of the resistance heating plate in real time in order to realize the effect of real-time adjustable heating power of the cooking utensils in the related art, The utility model proposes a power regulating circuit of a resistive hot plate and a cooking utensil. By sequentially connecting a power supply module, a resistive hot plate module, a power drive module, a sampling module and a microprocessor, the microprocessor realizes the The output signal of the sampling module controls the effect of the power driving module, thereby realizing real-time feedback and real-time adjustment of the power of the resistance heating plate.

In the following description, a lot of specific details have been set forth in order to fully understand the utility model, but the utility model can also be implemented in other ways different from those described here, therefore, the protection scope of the utility model is not limited by the following limitations of the specific embodiments disclosed.

The above descriptions are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (11)

1. A power regulation circuit of a resistive hot plate, characterized in that, comprising: A power module, the input end of the power module is connected with a fuse assembly; A resistive hot plate module, including at least one resistive hot plate and an auxiliary resistive hot plate, the resistive hot plate module is connected to the power module; a power drive module connected to the resistive hot plate module; a sampling module connected to the power module; A microprocessor, connected to the power drive module and the sampling module, the microprocessor controls the working state of the power drive module according to the power supply signal to adjust the power of the resistive hot plate and the Load power for auxiliary resistive hot plate. 2. The power regulating circuit of the resistance heating disc according to claim 1, wherein the auxiliary resistance heating disc comprises: Auxiliary heating resistance wire; An auxiliary heating power drive module is connected between the auxiliary heating resistance wire and the microprocessor. 3. The power regulating circuit of the resistance heating plate according to claim 2, wherein the auxiliary heating power drive module comprises: an auxiliary power switch connected to the microprocessor; The relay unit includes at least one relay, and the at least one relay is connected between the auxiliary power switch and the auxiliary heating resistance wire. 4. The power regulating circuit of the resistive hot plate according to claim 1, wherein the sampling module comprises: A voltage-dividing resistor unit, including a first resistor and a second resistor connected in series, the voltage-dividing resistor unit is connected between the power module and the ground wire, and the common of the first resistor and the second resistor The terminal is connected to the microprocessor as the output terminal of the power supply signal. 5. The power regulation circuit of the resistive hot plate according to claim 4, is characterized in that, described microprocessor also comprises: The temperature control module includes a temperature setting unit and a temperature sensing unit, wherein the temperature setting unit is used to preset the working temperature value, and the temperature sensing unit is used to sense the temperature of the at least one resistive hot plate actual temperature value; A power conversion module connected to the temperature control module, the power conversion module is used to determine the reference power of the resistive hot plate module according to the difference between the preset working temperature value and the actual temperature value; A power calculation module, connected to the sampling module, for calculating the sampled power supply signal as compensation power. 6. The power regulation circuit of the resistance heating disc according to claim 5, wherein the microprocessor comprises: A modulation module, the input end of the modulation module is connected to the power conversion module and the power calculation module to determine the duty ratio of the modulated bandwidth pulse, and the output end of the modulation module is connected to the power drive module to pass the The modulated bandwidth pulse controls the power of the power drive module. 7. The power regulation circuit of the resistive hot plate according to claim 4, wherein the power drive module comprises: A power switch unit, comprising at least one transistor switch, any one of the at least one transistor switch is connected between one of the resistive hot plates and the ground, and the base of any one of the transistor switches is connected to the Microprocessor output. 8. The power regulating circuit of the resistive hot plate according to claim 1, wherein the power supply module comprises: The input protection circuit includes a neutral wire and a live wire connected to the industrial frequency power supply, and a piezoresistor is connected between the neutral wire and the live wire. 9 . The power regulating circuit of a resistance hot plate according to claim 8 , wherein a protective capacitor is connected between the neutral line and the live line. 10 . 10. The power regulation circuit of the resistive hot plate according to claim 9, characterized in that, the power supply module further comprises: The rectifying and filtering circuit is connected between the input protection circuit and the resistive hot plate module, and the rectifying and filtering module is used for rectifying and filtering the input to the resistive hot disc module. 11. A cooking appliance, characterized by comprising: a power regulating circuit for a resistance hot plate according to any one of claims 1 to 10.