CN109519983B - Electromagnetic cooking system, cooker identification method thereof and cooker identification device - Google Patents
Electromagnetic cooking system, cooker identification method thereof and cooker identification device Download PDFInfo
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- CN109519983B CN109519983B CN201710842799.2A CN201710842799A CN109519983B CN 109519983 B CN109519983 B CN 109519983B CN 201710842799 A CN201710842799 A CN 201710842799A CN 109519983 B CN109519983 B CN 109519983B
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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
- F24C7/081—Arrangement or mounting of control or safety devices on stoves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/04—Measuring peak values or amplitude or envelope of ac or of pulses
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/10—Measuring sum, difference or ratio
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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
Abstract
The invention discloses an electromagnetic cooking system, a cooker identification method and a cooker identification device thereof, wherein the electromagnetic cooking system comprises a resonance circuit and a power switch tube for controlling the resonance circuit to perform resonance operation, and the cooker identification method comprises the following steps: the pot detection pulse signal is applied to the power switch tube to control the power switch tube to be switched on and off; detecting collector voltage of a power switch tube to obtain a first voltage detection value; whether a cooker and a cooker type exist in the electromagnetic cooking system at present or not is identified according to the first voltage detection value. The method of the embodiment of the invention can distinguish different cookers so as to carry out different power control aiming at different cookers, thereby improving the reliability of the system.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a pot identification method of an electromagnetic cooking system, a pot identification device of the electromagnetic cooking system and the electromagnetic cooking system with the pot identification device.
Background
Among the correlation technique, electromagnetism stove heating pan characteristic influences the operating condition of electromagnetic heating system, matches the pan that is fit for, and the electromagnetism stove all has very big promotion in aspects such as power output, temperature rise, noise, but when the pan can't match, the operating condition of electromagnetism stove circuit board and complete machine will be very abominable, not only causes the puzzlement to the user uses, more has the reliability to the circuit board to cause very big influence.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the art described above.
Therefore, a first objective of the present invention is to provide a method for identifying a pot of an electromagnetic cooking system, which can identify different pots to perform different power controls for different pots, thereby improving the reliability of the system.
The second objective of the present invention is to provide a pot identification device of an electromagnetic cooking system.
A third object of the present invention is to provide an electromagnetic cooking system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for identifying a pot of an electromagnetic cooking system, where the electromagnetic cooking system includes a resonant circuit and a power switch tube for controlling the resonant circuit to perform a resonant operation, and the method for identifying a pot includes the following steps: the pot detection pulse signal is applied to the power switch tube to control the power switch tube to be switched on and off; detecting collector voltage of the power switch tube to obtain a first voltage detection value; and identifying whether a cooker and the type of the cooker exist in the electromagnetic cooking system at present according to the first voltage detection value.
According to the pot identification method of the electromagnetic cooking system, the pot detection pulse signal is applied to the power switch tube to control the power switch tube to be switched on and off, the collector voltage of the power switch tube is detected to obtain a first voltage detection value, and then whether a pot and a type of the pot exist in the electromagnetic cooking system or not is identified according to the first voltage detection value. Therefore, different cookers can be distinguished by the method, different power control can be carried out aiming at different cookers, and the reliability of the system is improved.
In addition, the pot identification method of the electromagnetic cooking system according to the embodiment of the present invention may further have the following additional technical features:
in an embodiment of the present invention, after applying the pan detection pulse signal to the power switch tube, the method further includes: the method comprises the steps of detecting the voltage of input alternating current mains supply, processing the voltage of the input alternating current mains supply to obtain a second voltage detection value, and identifying whether cookware and cookware types exist in the electromagnetic cooking system currently or not according to the first voltage detection value and the second voltage detection value.
In an embodiment of the present invention, identifying whether a pot and a type of pot currently exist in the electromagnetic cooking system according to the first voltage detection value and the second voltage detection value includes: peak sampling the first voltage detection value to obtain a peak sampled voltage value; calculating and amplifying a difference between the peak sampled voltage value and the second voltage detection value to obtain an amplified voltage difference value; and identifying whether a cooker and the type of the cooker exist in the electromagnetic cooking system at present according to the amplified voltage difference value.
In an embodiment of the present invention, identifying whether there is a pot and a type of pot in the electromagnetic cooking system according to the amplified voltage difference includes: judging the amplified voltage difference value; if the amplified voltage difference value is larger than or equal to a preset pot-free judgment amplitude value, identifying that no pot exists in the electromagnetic cooking system currently; if the amplified voltage difference value is smaller than a preset no-pot judgment amplitude value and is larger than or equal to a first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 304; if the amplified voltage difference value is smaller than the first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 430.
In one embodiment of the invention, when a pot is identified in the electromagnetic cooking system, a current pot detection program is called for verification.
In order to achieve the above object, a second aspect of the present invention provides a pot identification apparatus for an electromagnetic cooking system, where the electromagnetic cooking system includes a resonant circuit and a power switch tube for controlling the resonant circuit to perform a resonant operation, the pot identification apparatus includes a control module and a first voltage detection module, where the control module is configured to apply a pot detection pulse signal to the power switch tube to control the power switch tube to turn on and off, the first voltage detection module is configured to detect a collector voltage of the power switch tube to obtain a first voltage detection value, and the control module identifies whether a pot and a type of a pot are currently present in the electromagnetic cooking system according to the first voltage detection value.
According to the pot identification device of the electromagnetic cooking system, the control module applies a pot detection pulse signal to the power switch tube to control the power switch tube to be switched on and off, the first voltage detection module detects collector voltage of the power switch tube to obtain a first voltage detection value, and the control module identifies whether a pot and a type of the pot exist in the electromagnetic cooking system at present according to the first voltage detection value. Therefore, the device can distinguish different cookers to carry out different power control aiming at different cookers, and the reliability of the system is improved.
In addition, the pot recognition device of the electromagnetic cooking system according to the above embodiment of the present invention may further have the following additional technical features:
in an embodiment of the invention, the pot identification apparatus of the electromagnetic cooking system further includes a second voltage detection module, the second voltage detection module is configured to detect a voltage of an input ac mains supply and process the voltage of the input ac mains supply to obtain a second voltage detection value, and the control module is further configured to identify whether a pot and a type of the pot currently exist in the electromagnetic cooking system according to the first voltage detection value and the second voltage detection value.
In an embodiment of the invention, the pot identification apparatus of the electromagnetic cooking system further includes a peak detection module and a voltage difference value amplification module, the peak detection module is configured to perform peak sampling on the first voltage detection value to obtain a peak sampling voltage value, the voltage difference value amplification module is configured to calculate and amplify a difference value between the peak sampling voltage value and the second voltage detection value to obtain an amplified voltage difference value, and the control module is further configured to identify whether a pot and a type of a pot currently exist in the electromagnetic cooking system according to the amplified voltage difference value.
In an embodiment of the present invention, the control module is further configured to determine the amplified voltage difference; if the amplified voltage difference value is larger than or equal to a preset pot-free judgment amplitude value, identifying that no pot exists in the electromagnetic cooking system currently; if the amplified voltage difference value is smaller than a preset no-pot judgment amplitude value and is larger than or equal to a first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 304; if the amplified voltage difference value is smaller than the first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 430.
In one embodiment of the invention, when a pot currently existing in the electromagnetic cooking system is identified, the control module calls a pot current detection program for verification.
In order to achieve the above object, an electromagnetic cooking system according to an embodiment of a third aspect of the present invention includes: the invention provides a pot recognition device of an electromagnetic cooking system in a second aspect embodiment.
According to the electromagnetic cooking system, different cookers can be distinguished through the cooker identification device of the electromagnetic cooking system, so that different power control can be performed on different cookers, and the reliability of the system is improved.
Advantages of additional aspects 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
Fig. 1 is a circuit diagram of an electromagnetic heating apparatus according to an embodiment of the present invention;
fig. 2 is a flowchart of a pot identification method of an electromagnetic cooking system according to an embodiment of the present invention;
FIG. 3 is a graph of collector voltage of a power switch tube according to one embodiment of the invention;
FIG. 4 is a waveform diagram of a peak sample voltage value according to one embodiment of the invention;
FIG. 5 is a waveform diagram of an amplified voltage difference according to one embodiment of the present invention;
FIG. 6 is a flow chart of a pot identification method of an electromagnetic cooking system according to an embodiment of the present invention;
fig. 7 is a block diagram illustrating a pot recognition apparatus of an electromagnetic cooking system according to an embodiment of the present invention; and
fig. 8 is a block diagram illustrating a pot recognition apparatus of an electromagnetic cooking system 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 following describes a pot identification method of an electromagnetic cooking system, a pot identification device of the electromagnetic cooking system, and an electromagnetic cooking system having the pot identification device according to embodiments of the present invention with reference to the accompanying drawings.
In an embodiment of the present invention, an induction cooking system may include a resonant circuit and a power switch controlling the resonant circuit to perform a resonant operation.
Specifically, as shown in fig. 1, the electromagnetic cooking system may include a rectifier bridge D1, a coil panel L1, a resonant capacitor C3, a power switch IGBT, a peak detection circuit a, a voltage difference value amplification circuit B, and a micro control unit MCU. The resonant circuit is composed of a coil panel L1 and a resonant capacitor C3. The peak detection circuit a is configured to detect a peak voltage of an input signal and output the peak voltage. And the voltage differential amplification circuit B is used for calculating and amplifying the difference value between the positive end input value and the negative end input value, outputting the amplified signal, and transmitting the output signal to the micro control unit MCU, and the micro control unit MCU carries out AD sampling on the output signal.
When a fixed pot detection signal is applied to the power switch tube IGBT, whether pots are placed or not and pots of different types are placed, the difference of the collector voltage of the IGBT is large, and the difference value between the collector voltage of the IGBT and the mains voltage can generally reach hundreds of volts, as shown in fig. 3. Assuming that the same pot detection signal is applied to the power switch tube IGBT, when no pot is placed, the voltage of the IGBT collector is higher than that of the IGBT collector when the pot is placed. When different pots are placed, taking the pot with the model number of 430 and the pot with the model number of 304 as an example, the collector voltage of the pot with the model number of 304 is higher than that of the pot with the model number of 430. Through a large amount of experimental tests, pans of other models have the same rule.
According to the analysis, whether the cookware exists or not and the cookware type can be judged according to the magnitude of the collector voltage of the IGBT of the power switch tube.
Fig. 2 is a flowchart of a pot identification method of an electromagnetic cooking system according to an embodiment of the present invention. As shown in fig. 2, the method for identifying a pot of an electromagnetic cooking system according to an embodiment of the present invention may include the following steps:
and S1, the pot detection pulse signal is applied to the power switch tube to control the power switch tube to be switched on and off.
And S2, detecting the collector voltage of the power switch tube to obtain a first voltage detection value.
S3, whether a pan and a pan type exist in the electromagnetic cooking system or not is identified according to the first voltage detection value.
Specifically, in a state without a pot, the microcontroller sends a fixed pot detection pulse signal (such as a PPG on signal) to the power switch tube, and when a pot is detected, the pot detection pulse is stopped to be output and converted into power output. The pot detection pulse signal is generally set to be in the us level, in the embodiment of the present invention, output 2us (Ton 1 in fig. 3) PPG pulse is first set, then 1us (Toff 1 in fig. 3) is closed, then 4us (Ton 2 in fig. 3) PPG pulse is output, then PPG output (Toff 2 in fig. 3) is stopped, under this pulse, the power switch tube is controlled to be turned on and off, so that resonance is generated, and the collector voltage of the power switch tube is changed, as shown in fig. 3.
When the collector voltage of the power switch tube is obtained, the voltage dividing resistor V2, that is, the collector signal (first voltage detection value) of the power switch tube, may be obtained by resistor voltage division, and the waveform thereof is an oscillation waveform. And then comparing the first voltage detection value with a preset condition to judge whether a pot is available at present and judge the type of the pot at present, wherein the preset condition is data obtained according to a large number of experimental tests, and the preset condition can comprise a voltage range when no pot is available and a voltage range when different types of pots are available.
In order to improve the accuracy of identification, according to an embodiment of the present invention, after applying the pan detection pulse signal to the power switch tube, the method may further include: the voltage of the input alternating current commercial power is detected, and the voltage of the input alternating current commercial power is processed to obtain a second voltage detection value, so that whether a cooker and a type of the cooker exist in the electromagnetic cooking system or not is identified according to the first voltage detection value and the second voltage detection value.
Further, according to an embodiment of the present invention, identifying whether a pot and a type of the pot are currently available in the electromagnetic cooking system according to the first voltage detection value and the second voltage detection value includes: the method comprises the steps of sampling a peak value of a first voltage detection value to obtain a peak value sampling voltage value, calculating and amplifying a difference value between the peak value sampling voltage value and a second voltage detection value to obtain an amplified voltage difference value, and identifying whether a pot and a type of the pot exist in an electromagnetic cooking system or not according to the amplified voltage difference value.
Still further, according to an embodiment of the present invention, identifying whether there is a pot and a type of pot in the electromagnetic cooking system according to the amplified voltage difference includes: and judging the amplified voltage difference value, if the amplified voltage difference value is greater than or equal to a preset no-pot judgment amplitude value, identifying that no pot exists currently in the electromagnetic cooking system, if the amplified voltage difference value is smaller than the preset no-pot judgment amplitude value and greater than or equal to a first preset value, identifying that a pot exists currently in the electromagnetic cooking system and the type of the pot is 304 pots, and if the amplified voltage difference value is smaller than the first preset value, identifying that a pot exists currently in the electromagnetic cooking system and the type of the pot is 430 pots. Wherein, the preset non-pan judgment amplitude value and the first preset value can be calibrated according to the actual situation.
Specifically, an alternating current mains voltage is obtained, and after rectification is performed through a full-bridge rectification circuit formed by external diodes (D2 and D3 shown in fig. 1) and diodes in a rectification bridge, voltage is divided by a voltage dividing resistor and stabilized by a ground resistor, a stable mains voltage division signal V1 is obtained and recorded as a second voltage detection value, wherein when the alternating current mains voltage is in a certain condition, V1 is a direct current signal with a fixed amplitude.
Then, the first voltage detection value V2 of the power switch tube is obtained by the method in the above embodiment, and is processed by the peak voltage detection circuit, the peak voltage of the input signal is obtained and maintained, and the peak sampling voltage value, denoted as Vout1, is output, and the output waveform is shown in fig. 4. After the peak sampled voltage value Vout1 is obtained, the second voltage detection value V1 and the peak sampled voltage value Vout1 are used as two ends of a voltage difference value amplification circuit, wherein the second voltage detection value V1 is a negative end, the peak sampled voltage value Vout1 is a positive end, the voltage difference value amplification circuit calculates and amplifies a difference value between the two ends to obtain an amplified voltage difference value Vout2, an output waveform of the amplified voltage difference value Vout2 is shown in fig. 5, and then the amplified voltage difference value Vout2 is sent to a microcontroller for AD sampling.
The microcontroller detects the amplified voltage difference Vout2 and compares it with the Pan-free judgment amplitude V _ nopan and the first preset value V _304Pan preset in the microcontroller program. When Vout2 is larger than or equal to V _ nopan, no Pan is considered to be in the electromagnetic cooking system, when V _304Pan is smaller than Vout2 and smaller than V _ nopan, Pan is considered to be in the electromagnetic cooking system and the Pan type is 304Pan, and when Vout2 is smaller than V _304Pan, Pan type is considered to be 430 Pan.
In addition, in order to ensure the accuracy of the judgment, according to one embodiment of the invention, when a pot currently exists in the electromagnetic cooking system is identified, a current pot detection program is also called for verification.
Specifically, when the current pot is detected to be 430 pot, the 430 no-pot ammeter is called, the current actual current is compared with the power meter current, if the current is smaller than the no-pot current, the pot state is switched to the no-pot state from the pot state, otherwise, the pot state is considered to be in the pot state, and when the pot state is switched to the no-pot state, the pot detection program is called again for detection. Similarly, when the current pot is detected to be 304 pots, the 304 pot-free ammeter is called, and the verification method is the same as that of the 430 pots, and the details are not described here.
To further understand the present invention, fig. 6 is a flowchart of a pot identification method of an electromagnetic cooking system according to an embodiment of the present invention. As shown in fig. 6, the method for identifying a pot of an electromagnetic cooking system may include the following steps:
and S101, electrifying the electromagnetic cooking system to work.
S102, judging whether the current state is a no pot state. If yes, go to step S103; if not, step S110 is executed.
And S103, outputting a primary pulse signal at an interval of 1S.
S104, the amplified voltage difference Vout2 processed by the voltage difference amplifying circuit is sampled.
S105, judging whether the Vout2 is larger than or equal to the preset pan-free judgment amplitude V _ nopan or not. If yes, go to step S106; if not, step S107 is performed.
S106, no pan is arranged in the electromagnetic cooking system at present.
S107, whether the first preset value V _304Pan < Vout2 < V _ nopan is established or not is judged. If yes, go to step S108; if not, step S109 is performed.
S108, the current type of the pot in the electromagnetic cooking system is 304.
S109, the current type of the cookware in the electromagnetic cooking system is 430 cookware.
S110, the electromagnetic cooking system enters a normal working procedure, and the pot detection procedure is switched to a circuit detection procedure.
S111, judging whether the current pot detection program detects that a pot exists. If yes, go to step S112; if not, return to step S106.
And S112, outputting power by the electromagnetic cooking system according to the set power gear.
In summary, according to the pot identification method of the electromagnetic cooking system in the embodiment of the invention, the pot detection pulse signal is applied to the power switch tube to control the power switch tube to be turned on and off, the collector voltage of the power switch tube is detected to obtain the first voltage detection value, and then whether a pot and a type of a pot are currently in the electromagnetic cooking system is identified according to the first voltage detection value. Therefore, different cookers can be distinguished by the method, different power control can be carried out aiming at different cookers, and the reliability of the system is improved.
Fig. 7 is a block diagram illustrating a pot recognition apparatus of an electromagnetic cooking system according to an embodiment of the present invention.
In an embodiment of the present invention, an induction cooking system may include a resonant circuit and a power switch controlling the resonant circuit to perform a resonant operation.
As shown in fig. 7, the pot recognition apparatus of the electromagnetic cooking system may include: a control module 10 and a first voltage detection module. The control module 10 is configured to apply a pot detection pulse signal to the power switch tube to control the power switch tube to be turned on and off, the first voltage detection module 20 is configured to detect a collector voltage of the power switch tube to obtain a first voltage detection value, and the control module 10 identifies whether a pot and a type of the pot are currently available in the electromagnetic cooking system according to the first voltage detection value.
According to an embodiment of the present invention, as shown in fig. 8, the pot identification apparatus of the electromagnetic cooking system further includes: the second voltage detection module 30, the second voltage detection module 30 is configured to detect a voltage of the input ac mains supply, and process the voltage of the input ac mains supply to obtain a second voltage detection value, and the control module 10 is further configured to identify whether a cookware and a type of the cookware are currently available in the electromagnetic cooking system according to the first voltage detection value and the second voltage detection value.
According to an embodiment of the present invention, as shown in fig. 8, the above-mentioned pot identification apparatus of the electromagnetic cooking system further includes a peak detection module 40 and a voltage difference value amplification module 50, the peak detection module 40 is configured to perform peak sampling on the first voltage detection value to obtain a peak sampling voltage value, the voltage difference value amplification module 50 is configured to calculate and amplify a difference value between the peak sampling voltage value and the second voltage detection value to obtain an amplified voltage difference value, and the control module 10 is further configured to identify whether a pot and a type of a pot currently exist in the electromagnetic cooking system according to the amplified voltage difference value.
According to an embodiment of the present invention, the control module 10 is further configured to determine the amplified voltage difference, identify that there is no pot currently in the electromagnetic cooking system if the amplified voltage difference is greater than or equal to a preset pot-free determination amplitude, identify that there is a pot currently in the electromagnetic cooking system and the type of the pot is 304 pot if the amplified voltage difference is less than the preset pot-free determination amplitude and is greater than or equal to a first preset value, and identify that there is a pot currently in the electromagnetic cooking system and the type of the pot is 430 pot if the amplified voltage difference is less than the first preset value.
According to an embodiment of the present invention, when a pot currently existing in the electromagnetic cooking system is identified, the control module 10 further calls a pot current detection program for verification.
It should be noted that, for details not disclosed in the pot identification apparatus of the electromagnetic cooking system according to the embodiment of the present invention, please refer to details disclosed in the pot identification method of the electromagnetic cooking system according to the embodiment of the present invention, and detailed descriptions thereof are omitted here.
According to the pot identification device of the electromagnetic cooking system, the control module applies a pot detection pulse signal to the power switch tube to control the power switch tube to be switched on and off, the first voltage detection module detects collector voltage of the power switch tube to obtain a first voltage detection value, and the control module identifies whether a pot and a type of the pot exist in the electromagnetic cooking system at present according to the first voltage detection value. Therefore, the device can distinguish different cookers to carry out different power control aiming at different cookers, and the reliability of the system is improved.
In addition, an embodiment of the present invention further provides an electromagnetic cooking system including: the invention provides a pot recognition device of an electromagnetic cooking system in a second aspect embodiment.
According to the electromagnetic cooking system, different cookers can be distinguished through the cooker identification device of the electromagnetic cooking system, so that different power control can be performed on different cookers, and the reliability of the system is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
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.
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 (9)
1. A pot identification method of an electromagnetic cooking system is characterized in that the electromagnetic cooking system comprises a resonant circuit and a power switch tube for controlling the resonant circuit to perform resonant operation, and the pot identification method comprises the following steps:
the pot detection pulse signal is applied to the power switch tube to control the power switch tube to be switched on and off;
detecting collector voltage of the power switch tube to obtain a first voltage detection value;
identifying whether a cooker and a cooker type exist in the electromagnetic cooking system at present according to the first voltage detection value so as to perform different power control on different cookers;
wherein, after applying the pot detection pulse signal to the power switch tube, still include:
the method comprises the steps of detecting the voltage of input alternating current mains supply, processing the voltage of the input alternating current mains supply to obtain a second voltage detection value, and identifying whether cookware and cookware types exist in the electromagnetic cooking system currently or not according to the first voltage detection value and the second voltage detection value.
2. The method for identifying a pot in an electromagnetic cooking system according to claim 1, wherein identifying whether a pot and a type of pot are currently in the electromagnetic cooking system according to the first voltage detection value and the second voltage detection value comprises:
peak sampling the first voltage detection value to obtain a peak sampled voltage value;
calculating and amplifying a difference between the peak sampled voltage value and the second voltage detection value to obtain an amplified voltage difference value;
and identifying whether a cooker and the type of the cooker exist in the electromagnetic cooking system at present according to the amplified voltage difference value.
3. The method of claim 2, wherein identifying whether a pot and a type of pot are currently in the electromagnetic cooking system according to the amplified voltage difference comprises:
judging the amplified voltage difference value;
if the amplified voltage difference value is larger than or equal to a preset pot-free judgment amplitude value, identifying that no pot exists in the electromagnetic cooking system currently;
if the amplified voltage difference value is smaller than a preset no-pot judgment amplitude value and is larger than or equal to a first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 304;
if the amplified voltage difference value is smaller than the first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 430.
4. The method for identifying a pot in an electromagnetic cooking system according to any one of claims 1 to 3, wherein when a pot currently existing in the electromagnetic cooking system is identified, a pot current check program is further invoked for verification.
5. A pot recognition device of an electromagnetic cooking system is characterized in that the electromagnetic cooking system comprises a resonance circuit and a power switch tube for controlling the resonance circuit to perform resonance operation, the pot recognition device comprises a control module and a first voltage detection module, wherein,
the control module is used for applying a pot detection pulse signal to the power switch tube to control the power switch tube to be switched on and off, the first voltage detection module is used for detecting collector voltage of the power switch tube to obtain a first voltage detection value, and the control module identifies whether a pot and a type of the pot exist in the electromagnetic cooking system or not according to the first voltage detection value so as to perform different power control aiming at different pots;
wherein, electromagnetic cooking system's pan recognition device still include second voltage detection module, second voltage detection module is used for detecting the voltage of input alternating current commercial power, and right the voltage of input alternating current commercial power is handled in order to obtain second voltage detection value, control module still is used for the basis first voltage detection value with second voltage detection value discernment whether have pan and pan type in the electromagnetic cooking system at present.
6. The pot identifying apparatus of the electromagnetic cooking system according to claim 5, further comprising a peak detection module and a voltage difference value amplifying module, wherein the peak detection module is configured to perform peak sampling on the first voltage detection value to obtain a peak sampled voltage value, the voltage difference value amplifying module is configured to calculate and amplify a difference value between the peak sampled voltage value and the second voltage detection value to obtain an amplified voltage difference value, and the control module is further configured to identify whether a pot and a type of pot are currently present in the electromagnetic cooking system according to the amplified voltage difference value.
7. The pot identification apparatus of an electromagnetic cooking system of claim 6, wherein the control module is further configured to,
judging the amplified voltage difference value;
if the amplified voltage difference value is larger than or equal to a preset pot-free judgment amplitude value, identifying that no pot exists in the electromagnetic cooking system currently;
if the amplified voltage difference value is smaller than a preset no-pot judgment amplitude value and is larger than or equal to a first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 304;
if the amplified voltage difference value is smaller than the first preset value, identifying that a pot is currently in the electromagnetic cooking system and the type of the pot is 430.
8. The pot identification apparatus of the electromagnetic cooking system according to any one of claims 5-7, wherein the control module further calls a current pot check program for verification when identifying a pot currently in the electromagnetic cooking system.
9. An electromagnetic cooking system comprising a pot identification device of the electromagnetic cooking system according to any one of claims 5 to 8.
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| CN112303684A (en) * | 2019-07-29 | 2021-02-02 | 深圳驭龙电焰科技有限公司 | Electric flame stove with pot detection function |
| CN112584565B (en) * | 2019-09-27 | 2022-08-30 | 浙江绍兴苏泊尔生活电器有限公司 | Electromagnetic heating circuit heating treatment method, electromagnetic heating circuit and appliance |
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