CN111385927B - Electromagnetic heating appliance and control method and control device thereof - Google Patents
Electromagnetic heating appliance and control method and control device thereof Download PDFInfo
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- CN111385927B CN111385927B CN201811640057.2A CN201811640057A CN111385927B CN 111385927 B CN111385927 B CN 111385927B CN 201811640057 A CN201811640057 A CN 201811640057A CN 111385927 B CN111385927 B CN 111385927B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/082—Arrangement or mounting of control or safety devices on ranges, e.g. control panels, illumination
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Abstract
The invention provides an electromagnetic heating appliance and a control method and a control device thereof, wherein the method comprises the following steps: controlling the electromagnetic heating appliance to heat at a maximum power gear, and adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance; acquiring the current actual output power of the electromagnetic heating appliance; determining that the current actual output power meets a target temperature control condition; the electromagnetic heating appliance is controlled to heat with preset power, wherein the preset power is smaller than the maximum power, so that timely and accurate temperature control is realized, different temperature control requirements of users are met, and the cooking effect is improved.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to an electromagnetic heating appliance and a control method and a control device thereof.
Background
An electromagnetic heating appliance such as an induction cooker in the related art generally performs temperature detection by a thermistor installed below a central position of a cooktop plate. However, since the temperature detection precision is poor and the temperature detection is not timely through the cooking panel, the effect of the cooking function related to the temperature control is not good, such as the cooking functions of temperature setting, frying temperature control and the like, which affects the user experience.
Therefore, the related art provides a constant-temperature cooker, and the constant temperature purpose is realized by utilizing the loss magnetism characteristic of cooker materials. In the cooking process, the constant temperature can be kept only at the Curie temperature point, and under some cooking scenes, the requirement of realizing the constant temperature at the temperature lower than the Curie temperature point exists, for example, oil adding or dish getting off is reminded at 180 degrees, but the actual requirements of users cannot be met by related technologies, and the user experience is poor.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a method for controlling an electromagnetic heating device, so as to achieve timely and accurate temperature control and meet different temperature control requirements of users.
A second object of the present invention is to provide a temperature control device for an electromagnetic heating appliance.
A third object of the present invention is to provide an electromagnetic heating appliance.
A fourth object of the invention is to propose another electromagnetic heating appliance.
A fifth object of the invention is to propose a non-transitory readable storage medium.
In order to achieve the above object, a first embodiment of the present invention provides a method for controlling an electromagnetic heating appliance, including the following steps: controlling the electromagnetic heating appliance to heat at a maximum power gear, and adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance; acquiring the current actual output power of the electromagnetic heating appliance; determining that the current actual output power meets a target temperature control condition; and controlling the electromagnetic heating appliance to heat with preset power, wherein the preset power is less than the maximum power.
According to the control method of the electromagnetic heating appliance, the electromagnetic heating appliance is controlled to heat at the maximum power gear, the output power of the electromagnetic heating appliance is adjusted according to the resonance voltage of the electromagnetic heating appliance, then the current actual output power of the electromagnetic heating appliance is obtained, and when the current actual output power meets the target temperature control condition, the electromagnetic heating appliance is controlled to heat at the preset power, so that timely and accurate temperature control is achieved, different temperature control requirements of users are met, and the cooking effect is improved.
According to an embodiment of the present invention, the method for controlling an electromagnetic heating appliance further includes: controlling the electromagnetic heating appliance to heat at the preset power for preset heating time; and controlling the electromagnetic heating appliance to heat at the maximum power gear again, and adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance.
According to an embodiment of the present invention, before determining that the current actual output power meets the target temperature control condition, the method further includes: acquiring a target heating temperature; acquiring corresponding target heating power according to the target heating temperature; the determining that the current actual output power satisfies a target temperature control condition includes: and reducing the current actual output power to the target heating power, and determining that the current actual output power meets a target temperature control condition.
According to an embodiment of the present invention, the determining that the current actual output power satisfies the target temperature control condition includes: determining the current temperature of the cooker according to the current actual output power; and the current temperature of the cooker is increased to a target heating temperature, and the current actual output power is determined to meet a target temperature control condition.
According to an embodiment of the invention, said determining the current temperature of the pot according to the current actual output power comprises: acquiring the current alternating current input voltage of the electromagnetic heating appliance; selecting a target parameter mapping relation corresponding to the current alternating-current input voltage from a plurality of pre-established parameter mapping relations according to the current alternating-current input voltage, wherein the parameter mapping relations correspond to the alternating-current input voltages respectively, and each parameter mapping relation is used for indicating the mapping relation between the maximum power and the temperature of the cooker under the alternating-current input voltage corresponding to each parameter mapping relation; and determining the current temperature of the cooker according to the current actual output power and the target parameter mapping relation.
According to an embodiment of the present invention, said adjusting the output power of said electromagnetic heating appliance according to the resonance voltage of said electromagnetic heating appliance comprises: acquiring a resonance voltage; and detecting and confirming that the resonance voltage is greater than a preset resonance voltage reference value, and reducing the width of a driving pulse of a switching tube in the electromagnetic heating appliance.
According to an embodiment of the present invention, the preset heating time has a value range of more than 2 seconds and less than 30 seconds; the preset power is K times of the actual maximum power when the target temperature control condition is met, wherein the value range of K is more than 0.4 and less than 0.9.
In order to achieve the above object, a second aspect of the present invention provides a control device for an electromagnetic heating appliance, including: the acquisition module is used for acquiring the current actual output power of the electromagnetic heating appliance; the control module is used for controlling the electromagnetic heating appliance to heat at a maximum power gear, adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance, determining that the current actual output power meets a target temperature control condition, and controlling the electromagnetic heating appliance to heat at a preset power, wherein the preset power is smaller than the maximum power.
According to the control device of the electromagnetic heating appliance, disclosed by the embodiment of the invention, the control module controls the electromagnetic heating appliance to heat at the maximum power gear, the output power of the electromagnetic heating appliance is adjusted according to the resonance voltage of the electromagnetic heating appliance, then the current actual output power of the electromagnetic heating appliance is obtained by the obtaining module, and when the control module determines that the current actual output power meets the target temperature control condition, the control module controls the electromagnetic heating appliance to heat at the preset power, so that the timely and accurate temperature control is realized, different temperature control requirements of a user are met, and the cooking effect is improved.
According to an embodiment of the present invention, the control module is further configured to control the electromagnetic heating appliance to heat at the preset power for a preset heating time, control the electromagnetic heating appliance to heat at a maximum power level again, and adjust the output power of the electromagnetic heating appliance according to the resonant voltage of the electromagnetic heating appliance.
According to an embodiment of the present invention, before determining that the current actual output power meets a target temperature control condition, the obtaining module is further configured to obtain a target heating temperature, and obtain a corresponding target heating power according to the target heating temperature; the control module is further configured to determine that the current actual output power is reduced to the target heating power, and determine that the current actual output power meets a target temperature control condition.
According to an embodiment of the present invention, the control module is further configured to determine a current temperature of the pot according to the current actual output power, determine that the current temperature of the pot is increased to a target heating temperature, and determine that the current actual output power meets a target temperature control condition.
According to an embodiment of the present invention, the control module is further configured to obtain a current ac input voltage of the electromagnetic heating appliance, select a target parameter mapping relationship corresponding to the current ac input voltage from a plurality of pre-established parameter mapping relationships according to the current ac input voltage, where the plurality of parameter mapping relationships respectively correspond to a plurality of ac input voltages, each parameter mapping relationship is used to indicate a mapping relationship between a maximum power and a temperature of a pot under the ac input voltage corresponding to each parameter mapping relationship, and determine a current temperature of the pot through the target parameter mapping relationship according to the current actual output power.
According to an embodiment of the invention, the control module is further configured to obtain a resonance voltage, detect and confirm that the resonance voltage is greater than a preset resonance voltage reference value, and reduce the width of the driving pulse of the switching tube in the electromagnetic heating appliance.
According to an embodiment of the present invention, the preset heating time has a value range of more than 2 seconds and less than 30 seconds; the preset power is K times of the actual maximum power when the target temperature control condition is met, wherein the value range of K is more than 0.4 and less than 0.9.
In order to achieve the above object, an electromagnetic heating appliance according to an embodiment of the third aspect of the present invention includes a control device of the electromagnetic heating appliance.
According to the electromagnetic heating appliance provided by the embodiment of the invention, the control device can be used for timely and accurately controlling the temperature, meeting different temperature control requirements of users and improving the cooking effect.
According to one embodiment of the invention, the electromagnetic heating appliance is an induction cooker, an electromagnetic rice cooker, an electromagnetic pressure cooker or an induction cooker.
In order to achieve the above object, a fourth aspect of the present invention provides an electromagnetic heating apparatus, including a memory, a processor, and a control program stored in the memory and executable on the processor, where the processor implements the control method of the electromagnetic heating apparatus when executing the control program.
To achieve the above object, a non-transitory readable storage medium is provided in an embodiment of a fifth aspect of the present invention, on which a control program is stored, and the program is executed by a processor to implement the control method of the electromagnetic heating appliance.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic circuit diagram of a control circuit of an electromagnetic heating appliance according to one embodiment of the present invention;
FIG. 2 is a waveform diagram of resonance when a general pot is heated according to an embodiment of the present invention;
FIG. 3 is a waveform of resonance when the thermostatic pot according to one embodiment of the present invention is heated;
FIG. 4 is a relationship between a driving pulse of a switching tube and a resonance voltage when a general pot is heated according to an embodiment of the present invention;
FIG. 5 is a relationship between a driving pulse and a resonance voltage of a switching tube when the thermostatic pot heats according to one embodiment of the invention;
FIG. 6 is a flow chart of a method of controlling an electromagnetic heating appliance according to one embodiment of the present invention;
FIG. 7 is a schematic diagram of a maximum power output versus temperature curve according to one embodiment of the present invention;
FIG. 8 is a schematic view of a heating temperature control curve of a control method of an electromagnetic heating appliance according to an embodiment of the present invention;
FIG. 9 is a flow chart of a method of controlling an electromagnetic heating appliance according to an embodiment of the present invention;
fig. 10 is a block schematic diagram of a control device of an electromagnetic heating appliance according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The present application is made based on the following recognition and findings of the inventors:
firstly, in order to achieve a good cooking effect, some manufacturers of electromagnetic heating appliances, such as induction cookers, adopt a manner of dispensing a thermostat pan to overcome the shortcomings of the electromagnetic heating appliances (temperature measurement is inaccurate and real-time performance is poor due to the thermistor for temperature measurement being below the cooktop plate). The related art provides a constant-temperature cooker, which realizes the purpose of constant temperature by utilizing the demagnetization characteristic of cooker materials. In the process of temperature rise of the material, the coupling inductance and the coupling resistance (the coupling of the cooker and the coil panel) of the electromagnetic heating appliance tend to be reduced. At around the curie temperature point, the coupling inductance and coupling resistance are very small. Because of the coupling inductance is too little, interrupted heating (the electric current undersize, judge not having the pot heating, stop heating, a few seconds after the start again examine the pot function), when the temperature reduces, coupling inductance and coupling resistance all are the increase trend, carry out normal heating once more, consequently, adopt the heating of constant temperature pot to realize the constant temperature effect.
However, in the cooking process, the curie temperature point cannot meet the actual requirement, and may be expected to be lower than the curie temperature point, such as reminding to add oil or drop dishes at 180 degrees, and the related art cannot meet such temperature control requirement, resulting in poor user experience.
Next, as shown in fig. 1, the electromagnetic heating device may be heated by using a control circuit shown in fig. 1, the control circuit including: the protection circuit comprises a protective tube F1, a rectifier bridge D1, a choke coil L1, a coil panel L2 (resonant inductor), a resonant capacitor C2, a filter capacitor C1, a switch tube Q1, a main control chip IC1, a driving module U3, a voltage sampling module U1, a current sampling module and a protection module. The protection module includes: the circuit includes a comparator CMP, a first resistor R1, a second resistor R2, and a third resistor R3. The current sampling module comprises a sixth resistor R6-a ninth resistor R9, a sampling resistor RC, a fourth capacitor C4, a fifth capacitor C5 and an operational amplifier AMP, specifically, the current of the switching tube is sampled through the RC, filtered through R6 and C4 and amplified through the AMP, and the main control chip IC1 obtains the current value through the AD 1. The master control chip IC1 also obtains voltage values through the AD 2. The connection relationship between the components is shown in fig. 1, and is not described herein again.
The rectifier bridge BD1 can rectify AC power input from the AC power supply to the control circuit into pulsating DC power, the choke coil L1 can effectively suppress common mode interference signals (such as lightning interference), and the filter capacitor C1 can filter the pulsating DC power to provide resonance energy for the resonant system (L2, C2). When the electromagnetic heating appliance is used for heating, the main control chip IC1 outputs a periodic PPG (Pulse Generator) control signal to control the on/off of the switching tube Q1, when the switching tube Q1 is on, the resonance system is powered on, and the resonance inductor L2 converts the electric field energy into magnetic field energy; when the switch tube Q1 is turned off, the resonant inductor L2 and the resonant capacitor C2 resonate to convert the magnetic field energy into electric field energy, and if a magnetic conductive metal surface is placed above the resonant inductor L2, the metal surface induces current, and because the metal surface has a resistor, the induced current can make the metal surface generate heat energy to heat food.
The switching tube Q1 may be an IGBT (Insulated Gate Bipolar Transistor).
When the pot placed on the heating panel of the electromagnetic heating appliance is a general 430 pot, the resonance waveform of the pot during heating is shown in fig. 2, wherein the vertical axis represents the resonance voltage VC, and the horizontal axis represents the time t. Under the condition of a 50Hz alternating current power supply, a complete heating waveform (the period is 20ms) exists in the middle of the heating waveform, a plurality of working envelopes (resonances) exist, and the maximum value of a resonant voltage is VC 1.
When the pot placed on the heating panel of the electromagnetic heating appliance is a thermostatic pot with a special curie point, the resonance waveform of the pot during heating is shown in fig. 3, wherein the vertical axis represents the resonance voltage VC, and the horizontal axis represents the time t. Because the coupling resistance RS of the thermostatic pot is relatively small when the temperature of the thermostatic pot exceeds the Curie point, the resonance current is relatively large, and the resonance voltage VC is relatively high and is close to VCmax. When the VCmax is exceeded, the comparator CMP inverts to output a corresponding signal to the main control chip IC1, and the main control chip IC1 reduces the width of the output driving pulse, so as to control VC to be at the value of VCmax, where the heating power is limited within a certain range.
It should be noted that VCmax should be smaller than the voltage withstanding value VCE of Q1 of the switching tube, otherwise Q1 could be easily burned. Such as a switch tube with the model number IHY20N135R3, the withstand voltage value is 1350V. VCmax may be controlled at 1080V (80% derate use: 1350 × 80% ═ 1080) based on reliability considerations.
In order to reduce the switching loss and stress and improve the working reliability of the switching tube, the switching tube needs to be controlled to be switched on/off at the zero-crossing point of the resonant voltage. When the cookware is a common cookware, the relationship between the driving pulse of the switching tube and the resonant voltage can be shown in fig. 4, where in fig. 4, the switching tube is turned on at the zero crossing point of the resonant voltage, where P represents the on-time of the switching tube, TP represents the off-time of the switching tube, and T represents the pulse period. The switching tube is switched on or off at the zero crossing point of the resonant voltage.
When the cookware is a constant-temperature cookware, the related tests show that the resonant inductance and the coupling resistance are obviously reduced when the temperature of the cookware is higher than 200 ℃. The resonant frequency is increased due to small resonance inductance and coupling resistance of the cooker, and the resonant voltage is higher than that of a common cooker under the condition of same power output. This may cause the resonant system to be abnormal, the resonant energy is sufficient, the relationship between the driving pulse of the switching tube and the resonant voltage can be seen from fig. 5, where Tn is the conducting time after the switching tube, as can be seen from fig. 5, the switching tube is conducted late and is serious, which may easily cause the switching tube to be damaged. At this time, if the resonance voltage is limited, the resonance energy is limited, the conduction width of the switching tube is increased, and the problem of the delayed conduction is alleviated.
Based on this, the embodiment of the invention provides a control method of an electromagnetic heating appliance, a control device of the electromagnetic heating appliance, the electromagnetic heating appliance and a non-transitory readable storage medium.
A control method of an electromagnetic heating appliance proposed according to an embodiment of the present invention is described in detail below with reference to the accompanying drawings.
Fig. 6 is a flowchart of a control method of an electromagnetic heating appliance according to an embodiment of the present invention. As shown in fig. 6, the control method includes the steps of:
s1: and controlling the electromagnetic heating appliance to heat at the maximum power gear, and adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance.
According to one embodiment of the present invention, adjusting the output power of an electromagnetic heating appliance according to the resonant voltage of the electromagnetic heating appliance comprises:
acquiring a resonance voltage;
and detecting and confirming that the resonance voltage is greater than a preset resonance voltage reference value, and reducing the width of a driving pulse of a switching tube in the electromagnetic heating appliance.
Wherein the resonant voltage reference is less than 1000 volts.
Specifically, as shown in fig. 1, when an electromagnetic heating appliance (for example, an induction cooker) performs a heating operation, the resonant inductor L2 and the resonant capacitor C2 resonate, and a resonant voltage VC is generated. When the pan that puts in on electromagnetic heating utensil heating panel is the constant temperature pan that has special curie point, can lose magnetism after the pan temperature surpasss curie point temperature to lead to system's resonant frequency to rise, switching tube Q1 opens serious hysteresis this moment, and parasitic diode in the switching tube Q1 has very big reverse current, and its flow direction is: the parasitic diode-L2-C1, which makes the filter capacitor C1 participate in resonance, is very likely to cause the switch tube Q1 and the filter capacitor C1 to be damaged, and is very likely to cause the filter capacitor C1 to be damaged due to the large reverse current. If the resonant voltage VC is limited and not too high at the moment, the resonant energy is reduced, the conduction width of the switch tube is reduced, the technical problem that the switch tube is seriously switched on and lagged is solved, if the problem that the switch tube is seriously switched on and lagged is solved, the generation of reverse current can be avoided, and the C1 is prevented from participating in resonance. However, the resonant voltage VC should not be too low, which would affect the heating effect.
Therefore, in the embodiment of the invention, the resonance voltage VC is limited below 1000V, namely the reference value of the resonance voltage is set below 1000V, if the resonance voltage exceeds the reference value of the resonance voltage, the width of the driving pulse of the switching device in the electromagnetic heating appliance is reduced, so that the resonance voltage is limited below the reference value of the resonance voltage, the resonance energy is not too high, the problem of serious delay of the switching tube can be solved, the filter capacitor can be prevented from participating in resonance, and the working reliability of the switching tube and the filter capacitor can be improved.
The inventor obtains through a large number of experiments that the resonance voltage reference value can be 980V, which not only solves the problem of serious hysteresis conduction of the switch tube, but also does not influence the heating effect.
According to an embodiment of the present invention, detecting and confirming that the resonant voltage VC is greater than the preset resonant voltage reference value may include: dividing the resonance voltage VC to obtain a divided resonance voltage V1; and detecting and confirming that the divided resonance voltage VC is greater than a preset divided resonance voltage reference value Vref.
Specifically, as shown in fig. 1, the comparator CMP may be used to determine whether the resonant voltage VC is greater than the preset resonant voltage reference value. Because the resonance voltage VC is higher, the resonance voltage VC can be subjected to voltage division processing by using the first resistor R1 and the second resistor R2 to obtain a divided resonance voltage V1, wherein V1 is [ R2/(R1+ R2) ]. multidot.vc, Vref is preset in advance according to a resonance voltage reference value, and it is ensured that the comparator CMP is turned when the resonance voltage VC is greater than the resonance voltage reference value. The main control chip IC1 may determine whether the resonant voltage VC is greater than the preset resonant voltage reference value according to the comparison signal output by the comparator CMP.
In an embodiment of the present invention, when the above-mentioned control method is applied to a control circuit of an electromagnetic heating appliance, the control circuit of the electromagnetic heating appliance includes a resonant capacitor C2, and the capacitance value of the resonant capacitor C2 is greater than 0.3 microfarad. It should be appreciated that to avoid affecting the heating effect, the capacitance of the resonant capacitor C2 may be increased slightly, and the capacitance of the resonant capacitor C2 may be greater than 0.3 microfarads, typically 0.33 microfarads.
It should also be understood that when the electromagnetic heating device is controlled to heat at the maximum power level, the resonant voltage VC is limited, which may cause the actual output power to decrease when the temperature of the pot rises. For example, in a heating state where the resonant voltage VC is limited, a graph of the maximum power and the temperature can be shown in fig. 7, and it can be seen from fig. 7 that, in an initial stage, the temperature of the pot is T1, when heating is performed at the maximum power level, the actual output power, i.e., the maximum power, can reach P1, as the temperature of the pot increases, the coupling resistance and the coupling inductance become smaller, and further the actual output power, i.e., the maximum power, gradually becomes smaller, and when the temperature of the pot reaches the curie temperature point T2, the actual output power reaches the minimum value P2.
S2: and acquiring the current actual output power of the electromagnetic heating appliance.
Specifically, the actual output power can be calculated by collecting the voltage and the current, for example, as shown in fig. 1, the current flowing through the switching tube Q1 can be collected by a sampling resistor RC connected in series to the emitter of the switching tube Q1, the voltage of the input alternating current can be collected by a voltage sampling module U1 connected to the alternating current power supply, and then the product of the current flowing through the switching tube Q1 and the voltage of the input alternating current can be used as the current actual output power of the electromagnetic heating appliance.
It should be noted that, since the current electromagnetic heating appliance is heated at the maximum power level, the current actual output power is the maximum power that can be reached by the electromagnetic heating appliance at the current pot temperature (the effect of limiting by the resonant voltage VC).
S3: and determining that the current actual output power meets the target temperature control condition.
According to an embodiment of the present invention, before determining that the current actual output power meets the target temperature control condition, i.e., step S2, the method further includes:
acquiring a target heating temperature;
and acquiring corresponding target heating power according to the target heating temperature.
It should be understood that the target heating temperature may be determined according to a temperature control gear selected by a user, for example, if the user selects a temperature control gear corresponding to 180 degrees celsius, the target heating temperature is 180 degrees celsius.
After the target heating temperature is determined, the maximum power corresponding to the target heating temperature can be obtained through a preset power and temperature parameter mapping relation according to the target heating temperature, the maximum power is the target heating power, and the power and temperature parameter mapping relation is used for indicating the mapping relation between the maximum power and the temperature of the cooker.
It should be noted that, the target heating temperature and the corresponding target heating power according to the target heating temperature may be obtained after step S1 and before step S2, or before step S1. The invention is not limited in this regard.
Further, determining that the current actual output power satisfies the target temperature control condition includes:
and reducing the current actual output power to the target heating power, and determining that the current actual output power meets the target temperature control condition.
It should be understood that, since the target heating power corresponds to the target heating temperature, when the current actual output power reaches the target heating power, it indicates that the pot temperature reaches the target heating temperature, and at this time, it is determined that the target temperature control condition is satisfied.
According to another embodiment of the present invention, determining that the current actual output power satisfies the target temperature control condition includes:
determining the current temperature of the cooker according to the current actual output power;
and (4) increasing the current temperature of the cooker to the target heating temperature, and determining that the current actual output power meets the target temperature control condition.
Specifically, in the embodiment of the present invention, in order to obtain the temperature of the pot according to the actual output power, a parameter mapping relationship is pre-established in the embodiment of the present invention, and the parameter mapping relationship is used for indicating a mapping relationship between the maximum power and the temperature of the pot. In the embodiment of the invention, in the process of controlling the electromagnetic heating appliance to heat at the maximum power gear and limit the resonant voltage, the current actual output power of the electromagnetic heating appliance can be obtained first, and then the temperature of the cookware corresponding to the current actual output power is determined according to the current actual output power and the parameter mapping relation.
It should be understood that the information of the parameter mapping relationship may be stored in the main control chip IC1, for example, the main control chip IC1 obtains the current actual output power of the electromagnetic heating appliance, and determines the temperature of the pot corresponding to the current actual output power through the parameter mapping relationship.
It should also be understood that the parameter mapping relationship in the embodiment of the present invention may be determined based on a variation of the maximum power of the electromagnetic heating appliance with the temperature of the pot. When the electromagnetic heating device heats at the maximum power level, the resonant voltage VC is limited, and the actual output power may decrease after the temperature of the pot rises, that is, as shown in fig. 7, the electromagnetic heating device decreases with the temperature rise at the maximum power.
The variation relationship of the maximum power of the electromagnetic heating appliance along with the temperature of the cooker can be determined through experiments, for example, the electromagnetic heating appliance can be controlled to heat at a maximum power gear and limit the resonant voltage, at the moment, the actual output power of the electromagnetic heating appliance under each set temperature point is collected, and then the variation relationship of the maximum power along with the temperature of the cooker, namely the parameter mapping relationship, is obtained.
Further, in some embodiments of the invention, determining the current temperature of the pot based on the current actual output power comprises:
acquiring the current alternating current input voltage of the electromagnetic heating appliance;
selecting a target parameter mapping relation corresponding to the current alternating-current input voltage from a plurality of pre-established parameter mapping relations according to the current alternating-current input voltage, wherein the plurality of parameter mapping relations correspond to the plurality of alternating-current input voltages respectively, and each parameter mapping relation is used for indicating the mapping relation between the maximum power and the temperature of the cooker under the alternating-current input voltage corresponding to each parameter mapping relation;
and determining the current temperature of the cookware according to the current actual output power and the target parameter mapping relation.
That is to say, in the embodiment of the present invention, in order to obtain the temperature of the pot according to the actual output power, a plurality of parameter mapping relationships are pre-established in the embodiment of the present invention, the parameter mapping relationships respectively correspond to a plurality of ac input voltages, and each parameter mapping relationship is used to indicate a mapping relationship between the maximum power and the temperature of the pot under the ac input voltage corresponding to each parameter mapping relationship
In the process of controlling the electromagnetic heating appliance to heat at the maximum power gear and limit the resonant voltage, a target parameter mapping relation corresponding to the current alternating-current input voltage can be selected from a plurality of pre-established parameter mapping relations based on the current alternating-current input voltage, and then the current temperature of the cooker is determined according to the current actual output power and the target parameter mapping relation.
As an example, the plurality of parameter mapping relationships may be determined through experiments, for example, in order to determine a parameter mapping relationship corresponding to a certain ac input voltage, the ac input voltage may be stabilized at the ac input voltage, then the electromagnetic heating appliance is controlled to heat at a maximum power level and limit the resonant voltage, at this time, the actual output power of the electromagnetic heating appliance at each set temperature point is collected, and then a variation relationship of the maximum power at the ac input voltage with the temperature of the cooker, that is, the parameter mapping relationship corresponding to the ac input voltage is obtained.
As another example, the plurality of parameter mappings may be determined by first determining the parameter mapping corresponding to the reference voltage, for example, 220V, and then determining the parameter mapping corresponding to the other setting voltages according to the relationship between the parameter mapping corresponding to the other setting voltages and the parameter mapping corresponding to the reference voltage.
For example, the relationship between the maximum power Pu corresponding to the ac input voltage U and the maximum power P _220V corresponding to 220V is Pu ═ K × P _220V, where K ═ f (V _ AD, V _ AD _220V), that is, K is a functional relation between the sampled values V _ AD of the ac input voltage U and the sampled values V _ AD _220V of the 220V voltage, specifically, K ═ VAD/V _ AD _ 220V. After the parameter mapping relationship corresponding to 220V is determined, according to Pu K P220V, the parameter mapping relationship corresponding to each set ac input voltage U can be determined, and then a plurality of parameter mapping relationships are obtained.
Therefore, voltage compensation can be realized by presetting a plurality of parameter mapping relations, and the accuracy of temperature measurement is improved.
S4: and controlling the electromagnetic heating appliance to heat at a preset power, wherein the preset power is less than the maximum power.
That is to say, when it is determined that the current actual output power meets the target temperature control condition, that is, the current actual output power is reduced to the target heating power or the current temperature of the pot reaches the target heating temperature, the power output of the electromagnetic heating appliance is reduced, that is, the electromagnetic heating appliance is controlled to heat with the preset power, where the preset power is smaller than the maximum power, that is, the preset power is smaller than the target heating power corresponding to the target heating temperature.
In one example of the present invention, the electromagnetic heating appliance may also be controlled to emit a warning message or a warning sound when it is determined that the current actual output power satisfies the target temperature control condition. For example, the prompt information may be displayed by a display device on the electromagnetic heating appliance, wherein the display device may be a display screen or an indicator light, or the like, or the alarm sound may be emitted by an audio prompting device, wherein the audio prompting device may be a buzzer, or the like. Thus, the user can be reminded that the temperature has been reached.
Further, according to an embodiment of the present invention, the control method of the electromagnetic heating appliance further includes:
controlling an electromagnetic heating appliance to heat at a preset power for a preset heating time;
and controlling the electromagnetic heating appliance to heat at the maximum power gear again, and adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance.
That is, after the electromagnetic heating appliance is controlled to heat at the preset power for the preset heating time, the electromagnetic heating appliance is controlled to heat at the maximum power level again, and the output power of the electromagnetic heating appliance is adjusted according to the resonance voltage of the electromagnetic heating appliance, that is, the process returns to step S1.
At the moment, the power is reduced to heat the preset heating time, the temperature of the cooker begins to drop, at the moment, the electromagnetic heating appliance is controlled to heat at the maximum power gear, the actual output power of the electromagnetic heating appliance exceeds the target heating power, along with the rise of the temperature and the limitation on the resonance voltage, the actual output power of the electromagnetic heating appliance is gradually reduced, when the current actual output power meets the target temperature control condition, the power output of the electromagnetic heating appliance is reduced again, and the electromagnetic heating appliance is controlled to heat the preset heating time at the preset power. Therefore, the steps S1-S4 are repeatedly executed, so that timely and accurate temperature control is realized, different temperature control requirements of users are met, and the cooking effect is improved.
As an example, the preset heating time is in a range of greater than 2 seconds and less than 30 seconds, preferably, the range may be 2 seconds to 10 seconds, for example, 2 seconds, 3 seconds, or 10 seconds may be selected; the preset power P3 is K times the actual maximum power P when the target temperature control condition is satisfied, where K is greater than 0.4 and less than 0.9, and a typical value is 0.8, that is, P3 is 0.8P. When the target temperature control condition is met, the actual maximum power is the target heating power corresponding to the target heating temperature, so the preset power can also be K times of the target heating power.
Specifically, referring to fig. 8, the heating and temperature controlling process of the electromagnetic heating appliance according to the embodiment of the present invention is as follows:
in the initial stage, the electromagnetic heating appliance is controlled to heat at the maximum power gear, and the maximum power Pmax corresponding to the maximum power gear is initially heated. When the temperature rises, the actual output power gradually becomes smaller due to the effect of controlling the resonance voltage.
When the actual output power reaches the target heating power P _ target (reaches the target heating temperature), the heating power of the electromagnetic heating appliance is controlled to be reduced to the preset power P3(P3< P _ target).
After heating at the preset power P3 for a preset heating time, for example, N seconds, the electromagnetic heating appliance is controlled again to heat at the maximum power gear, and when the actual output power reaches the target heating power P _ target, the heating power of the electromagnetic heating appliance is controlled again to be reduced to the preset power P3 for heating, for example, N seconds.
And circulating the steps, controlling the electromagnetic heating appliance to heat at the maximum power gear after heating for N seconds at the preset power P3 every time.
Therefore, timely and accurate temperature control is realized, different temperature control requirements of users are met, and cooking effect is improved
According to an embodiment of the present invention, taking the temperature detection method as an example, the control flow of the control method of the electromagnetic heating appliance is as follows:
a1) controlling the electromagnetic heating appliance to heat at a maximum power gear, and controlling the output power of the electromagnetic heating device in a mode of controlling collector voltage VC (namely resonance voltage) of the switching tube, so that the switching tube is protected to work in a reliable state, and a constant-temperature cooker is placed on the electromagnetic heating appliance;
a2) the main control chip IC1 obtains the current actual output power through the voltage collected by the voltage sampling module and the current collected by the current sampling module, that is, the actual output power is equal to voltage × current;
a3) calculating the current maximum power, namely the temperature of the corresponding pot under the current actual output power according to a mapping relation (a relation or a relation table) between the preset maximum power and the temperature;
a4) when the temperature of the cooker reaches the target heating temperature, the heating power of the electromagnetic heating appliance is reduced, and a user is reminded (the target heating temperature is reached), so that the temperature control is realized.
According to another embodiment of the present invention, taking the power control method as an example, the control flow of the control method of the electromagnetic heating appliance is as follows:
b1) obtaining a maximum power target value when the target heating temperature is reached according to the target heating temperature, wherein the maximum power target value is the target heating power;
b2) controlling the electromagnetic heating appliance to heat at the maximum power gear (controlling the power output of the electromagnetic heating appliance in a mode of limiting the resonant voltage VC;
b3) when the maximum power is reduced to a maximum power target value (the actual output power reaches the target heating power), the temperature of the cooker reaches the target heating temperature, and the power output is reduced;
b4) after heating for N seconds at preset power P3, heating at the maximum power gear is started and whether the maximum power is reduced to the maximum power target value (whether the temperature of the cooker reaches the target heating temperature) is detected.
When the maximum power is smaller than the maximum power target value, the power output is reduced (the actual temperature of the cooker is higher), and when the maximum power is larger than the maximum power target value, the maximum power output (the actual temperature of the cooker is lower), so that the constant temperature control is realized.
Based on this, referring to fig. 9, the method for controlling an electromagnetic heating appliance according to an embodiment of the present invention may specifically include the following steps:
s101: and acquiring a current temperature control gear TEMP.
S102: and judging whether an over-temperature mark exists or not.
If yes, executing step S103; if not, step S108 is performed.
S103: and obtaining a maximum power target value P _ target, namely target heating power according to the current temperature control gear TEMP, and controlling the electromagnetic heating appliance to heat at the maximum power gear.
S104: and calculating the current actual output power, namely the current maximum power P according to the acquired voltage (the voltage of the alternating current input power supply) and current (the current flowing through the switching tube).
S105: and judging whether the current maximum power P is larger than or equal to the maximum power target value P _ target.
If yes, go to step S106; if not, step S107 is performed.
S106: clearing the over-temperature mark and exiting.
S107: and reducing the heating power to a preset power P3, namely controlling the electromagnetic heating appliance to heat at the preset power P3, setting an over-temperature mark, and exiting.
S108: and judging whether the preset heating time N seconds delay is reached.
If yes, go to step S108; if not, step S110 is executed.
S109: and controlling the electromagnetic heating appliance to heat at the maximum power gear, namely, performing forced maximum power heating, and executing step S104.
S110: and controlling the electromagnetic heating appliance to heat at a preset power P3, and exiting.
In summary, according to the control method of the electromagnetic heating appliance in the embodiment of the present invention, the electromagnetic heating appliance is controlled to heat at the maximum power level, the output power of the electromagnetic heating appliance is adjusted according to the resonant voltage of the electromagnetic heating appliance, then the current actual output power of the electromagnetic heating appliance is obtained, and when it is determined that the current actual output power meets the target temperature control condition, the electromagnetic heating appliance is controlled to heat at the preset power, so as to achieve timely and accurate temperature control, meet different temperature control requirements of a user, and improve a cooking effect.
In order to realize the control method of the electromagnetic heating appliance of the embodiment, the invention also provides a control device of the electromagnetic heating appliance.
Fig. 10 is a block schematic diagram of a control device of an electromagnetic heating appliance according to an embodiment of the present invention. As shown in fig. 10, the control device of the electromagnetic heating appliance includes: an acquisition module 10 and a control module 20.
The obtaining module 10 is used for obtaining the current actual output power of the electromagnetic heating appliance; the control module 20 is configured to control the electromagnetic heating appliance to heat at a maximum power level, adjust the output power of the electromagnetic heating appliance according to the resonant voltage of the electromagnetic heating appliance, determine that the current actual output power meets a target temperature control condition, and control the electromagnetic heating appliance to heat at a preset power, where the preset power is less than the maximum power.
According to an embodiment of the present invention, the control module is further configured to control the electromagnetic heating apparatus to heat at a preset power for a preset heating time, control the electromagnetic heating apparatus to heat at a maximum power level again, and adjust the output power of the electromagnetic heating apparatus according to the resonant voltage of the electromagnetic heating apparatus.
According to an embodiment of the present invention, before determining that the current actual output power meets the target temperature control condition, the obtaining module 10 is further configured to obtain a target heating temperature, and obtain a corresponding target heating power according to the target heating temperature; the control module 20 is further configured to determine that the current actual output power is reduced to the target heating power, and determine that the current actual output power meets the target temperature control condition.
According to an embodiment of the present invention, the control module 20 is further configured to determine a current temperature of the pot according to the current actual output power, determine that the current temperature of the pot is increased to the target heating temperature, and determine that the current actual output power meets the target temperature control condition.
According to an embodiment of the present invention, the control module 20 is further configured to obtain a current ac input voltage of the electromagnetic heating appliance, and select a target parameter mapping relationship corresponding to the current ac input voltage from a plurality of pre-established parameter mapping relationships according to the current ac input voltage, where the plurality of parameter mapping relationships respectively correspond to the plurality of ac input voltages, each parameter mapping relationship is used to indicate a mapping relationship between a maximum power and a temperature of the pot under the ac input voltage corresponding to each parameter mapping relationship, and determine a current temperature of the pot through the target parameter mapping relationship according to the current actual output power.
According to an embodiment of the present invention, the control module 20 is further configured to obtain a resonance voltage, detect and confirm that the resonance voltage is greater than a preset resonance voltage reference value, and reduce the width of the driving pulse of the switching tube in the electromagnetic heating appliance.
According to an embodiment of the present invention, the preset heating time has a value range of more than 2 seconds and less than 30 seconds; the preset power is K times of the actual maximum power when the target temperature control condition is met, wherein the value range of K is more than 0.4 and less than 0.9.
It should be noted that the foregoing explanation of the embodiment of the control method of the electromagnetic heating appliance is also applicable to the control device of the electromagnetic heating appliance of this embodiment, and details are not repeated here.
According to the control device of the electromagnetic heating appliance, disclosed by the embodiment of the invention, the control module controls the electromagnetic heating appliance to heat at the maximum power gear, the output power of the electromagnetic heating appliance is adjusted according to the resonance voltage of the electromagnetic heating appliance, then the current actual output power of the electromagnetic heating appliance is obtained by the obtaining module, and when the control module determines that the current actual output power meets the target temperature control condition, the control module controls the electromagnetic heating appliance to heat at the preset power, so that the timely and accurate temperature control is realized, different temperature control requirements of a user are met, and the cooking effect is improved.
In order to implement the above embodiments, an electromagnetic heating appliance provided by an embodiment of the present invention includes the control device of the electromagnetic heating appliance of the foregoing embodiments.
According to one embodiment of the present invention, the electromagnetic heating appliance is an induction cooker, an electromagnetic rice cooker, an electromagnetic pressure cooker or an induction cooker.
According to the electromagnetic heating appliance provided by the embodiment of the invention, the control device can be used for timely and accurately controlling the temperature, meeting different temperature control requirements of users and improving the cooking effect.
In order to implement the above embodiments, the present invention further provides an electromagnetic heating appliance, which includes a memory, a processor, and a control program stored in the memory and executable on the processor, and when the processor executes the control program, the method for controlling the electromagnetic heating appliance of the foregoing embodiments is implemented.
In order to achieve the above-described embodiments, the present invention also proposes a non-transitory readable storage medium having stored thereon a control program which, when executed by a processor, implements the control method of the electromagnetic heating appliance of the foregoing embodiments.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (18)
1. A control method of an electromagnetic heating appliance is characterized in that the method is used for heating a thermostatic pot and comprises the following steps:
controlling the electromagnetic heating appliance to heat at a maximum power gear, and adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance;
acquiring the current actual output power of the electromagnetic heating appliance;
determining that the current actual output power meets a target temperature control condition;
and controlling the electromagnetic heating appliance to heat with preset power, wherein the preset power is less than the maximum power.
2. The control method of an electromagnetic heating appliance according to claim 1, further comprising:
controlling the electromagnetic heating appliance to heat at the preset power for preset heating time;
and controlling the electromagnetic heating appliance to heat at the maximum power gear again, and adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance.
3. The method of controlling an electromagnetic heating appliance according to claim 1, before determining that the current actual output power satisfies a target temperature control condition, further comprising:
acquiring a target heating temperature;
acquiring corresponding target heating power according to the target heating temperature;
the determining that the current actual output power satisfies a target temperature control condition includes:
and reducing the current actual output power to the target heating power, and determining that the current actual output power meets a target temperature control condition.
4. The method of controlling an electromagnetic heating appliance according to claim 1, wherein said determining that the current actual output power satisfies a target temperature control condition comprises:
determining the current temperature of the cooker according to the current actual output power;
and the current temperature of the cooker is increased to a target heating temperature, and the current actual output power is determined to meet a target temperature control condition.
5. The method of controlling an electromagnetic heating appliance according to claim 4, wherein said determining a current temperature of the pot according to the current actual output power comprises:
acquiring the current alternating current input voltage of the electromagnetic heating appliance;
selecting a target parameter mapping relation corresponding to the current alternating-current input voltage from a plurality of pre-established parameter mapping relations according to the current alternating-current input voltage, wherein the parameter mapping relations correspond to the alternating-current input voltages respectively, and each parameter mapping relation is used for indicating the mapping relation between the maximum power and the temperature of the cooker under the alternating-current input voltage corresponding to each parameter mapping relation;
and determining the current temperature of the cooker according to the current actual output power and the target parameter mapping relation.
6. The method of controlling an electromagnetic heating appliance according to claim 1, wherein said adjusting the output power of the electromagnetic heating appliance according to the resonant voltage of the electromagnetic heating appliance comprises:
acquiring a resonance voltage;
and detecting and confirming that the resonance voltage is greater than a preset resonance voltage reference value, and reducing the width of a driving pulse of a switching tube in the electromagnetic heating appliance.
7. The control method of an electromagnetic heating appliance according to claim 2,
the value range of the preset heating time is more than 2 seconds and less than 30 seconds;
the preset power is K times of the actual maximum power when the target temperature control condition is met, wherein the value range of K is more than 0.4 and less than 0.9.
8. A control device of an electromagnetic heating appliance, which is used for heating a thermostatic pot, comprises:
the acquisition module is used for acquiring the current actual output power of the electromagnetic heating appliance;
the control module is used for controlling the electromagnetic heating appliance to heat at a maximum power gear, adjusting the output power of the electromagnetic heating appliance according to the resonance voltage of the electromagnetic heating appliance, determining that the current actual output power meets a target temperature control condition, and controlling the electromagnetic heating appliance to heat at a preset power, wherein the preset power is smaller than the maximum power.
9. The control device of the electromagnetic heating appliance according to claim 8, wherein the control module is further configured to control the electromagnetic heating appliance to heat at the preset power for a preset heating time, control the electromagnetic heating appliance to heat at a maximum power level again, and adjust the output power of the electromagnetic heating appliance according to the resonant voltage of the electromagnetic heating appliance.
10. The control device of an electromagnetic heating appliance according to claim 8, wherein before determining that the current actual output power satisfies a target temperature control condition,
the acquisition module is further used for acquiring a target heating temperature and acquiring corresponding target heating power according to the target heating temperature;
the control module is further configured to determine that the current actual output power is reduced to the target heating power, and determine that the current actual output power meets a target temperature control condition.
11. The control device of the electromagnetic heating appliance according to claim 8, wherein the control module is further configured to determine a current temperature of the pot according to the current actual output power, determine that the current temperature of the pot is increased to a target heating temperature, and determine that the current actual output power meets a target temperature control condition.
12. The apparatus of claim 11, wherein the control module is further configured to obtain a current ac input voltage of the electromagnetic heating apparatus, and select a target parameter mapping relationship corresponding to the current ac input voltage from a plurality of pre-established parameter mapping relationships according to the current ac input voltage, wherein the parameter mapping relationships correspond to a plurality of ac input voltages respectively, each parameter mapping relationship is used to indicate a mapping relationship between a maximum power and a temperature of a pot at the ac input voltage corresponding to each parameter mapping relationship, and determine a current temperature of the pot according to the current actual output power through the target parameter mapping relationship.
13. The control device of the electromagnetic heating appliance according to claim 8, wherein the control module is further configured to obtain a resonance voltage, and detect and confirm that the resonance voltage is greater than a preset resonance voltage reference value, so as to reduce the width of the driving pulse of the switching tube in the electromagnetic heating appliance.
14. The control device of an electromagnetic heating appliance according to claim 9,
the value range of the preset heating time is more than 2 seconds and less than 30 seconds;
the preset power is K times of the actual maximum power when the target temperature control condition is met, wherein the value range of K is more than 0.4 and less than 0.9.
15. An electromagnetic heating appliance, characterized by comprising a control device of an electromagnetic heating appliance according to any one of claims 8-14.
16. The electromagnetic heating appliance according to claim 15, wherein the electromagnetic heating appliance is an induction cooker, an electromagnetic rice cooker, an electromagnetic pressure cooker or an induction cooker.
17. An electromagnetic heating appliance, comprising a memory, a processor and a control program stored on the memory and executable on the processor, wherein the processor executes the control program to implement the method of controlling an electromagnetic heating appliance according to any one of claims 1 to 7.
18. A non-transitory readable storage medium, characterized in that a control program is stored thereon, which when executed by a processor implements the control method of the electromagnetic heating appliance according to any one of claims 1 to 7.
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| CN115278964A (en) * | 2021-04-30 | 2022-11-01 | 浙江苏泊尔家电制造有限公司 | Heating control method and device and electromagnetic heating cooking utensil |
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