CN115031264A - Pot detection method of electromagnetic heating device, electromagnetic heating device and control device - Google Patents
Pot detection method of electromagnetic heating device, electromagnetic heating device and control device Download PDFInfo
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- CN115031264A CN115031264A CN202210585421.XA CN202210585421A CN115031264A CN 115031264 A CN115031264 A CN 115031264A CN 202210585421 A CN202210585421 A CN 202210585421A CN 115031264 A CN115031264 A CN 115031264A
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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
- F24C7/002—Stoves
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The invention provides a pot detection method of an electromagnetic heating device, the electromagnetic heating device and a control device, wherein the pot detection method comprises the following steps: sending a single pulse signal to the heating control circuit to oscillate the resonant circuit; acquiring the synchronous turnover number from the synchronous circuit; judging whether a cooker exists on the electromagnetic heating device or not according to the synchronous turnover number; under the condition that the cookware exists, sending a low-power pulse signal of a first preset time to the heating control circuit; acquiring a sampling parameter value, wherein the sampling parameter value is used for reflecting the position state of the cookware; judging whether the placement position of the pot is correct or not according to the sampling parameter value; according to the scheme provided by the invention, whether the placement position of the cookware is correct or not can be accurately detected, and the use reliability of the electromagnetic heating device is favorably improved.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a cookware detection method of an electromagnetic heating device, the electromagnetic heating device and a control device.
Background
At present electromagnetic heating device wide application is in people's daily life, to electromagnetic heating device, needs supporting special pan to use usually, in order to guarantee normal use, generally needs to detect the position state of pan, and current detection mode adopts structure spacing groove to combine photoelectric switch or inching switch to detect usually, and structural design is complicated relatively, and the cost is higher, and it is lower to detect the rate of accuracy simultaneously.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a pot detection method of an electromagnetic heating device, the electromagnetic heating device and a control device, which can accurately detect whether the placement position of a pot is correct or not and are beneficial to improving the use reliability of the electromagnetic heating device.
In a first aspect, an embodiment of the present invention provides a method for detecting a pot of an electromagnetic heating device, where the electromagnetic heating device includes a pot detection circuit, the pot detection circuit includes a power input terminal, a heating control circuit, a resonant circuit, and a synchronous circuit, the heating control circuit is provided with a switch tube, and the method for detecting a pot includes:
sending a single pulse signal to the heating control circuit to oscillate the resonant circuit;
acquiring the synchronous turnover number from the synchronous circuit;
judging whether a cooker exists on the electromagnetic heating device or not according to the synchronous turnover number;
under the condition that the cookware exists, sending a low-power pulse signal of a first preset time to the heating control circuit;
acquiring a sampling parameter value, wherein the sampling parameter value is used for reflecting the position state of the cookware;
and judging whether the placement position of the pot is correct or not according to the sampling parameter value.
The pot detection method of the electromagnetic heating device provided by the embodiment of the invention at least has the following beneficial effects: the method comprises the steps of obtaining the synchronous turnover number through sending a single pulse signal, carrying out primary judgment according to the synchronous turnover number, determining whether a cooker exists on the electromagnetic heating device, sending a low-power pulse signal of first preset time to a heating control circuit when the cooker is determined to exist, obtaining a sampling parameter value, accurately judging the position state of the cooker according to the sampling parameter value, accurately detecting whether the placement position of the cooker is correct or not by combining the synchronous turnover number and the sampling parameter value, and being beneficial to improving the use reliability of the electromagnetic heating device.
In the above method for detecting a cookware, the cookware detecting circuit further includes a current detecting circuit and a voltage detecting circuit, the current detecting circuit is disposed between the power input end and the resonant circuit, the voltage detecting circuit is configured to obtain a grid voltage detection value from the power input end, and the obtaining of the sampling parameter value includes at least one of:
acquiring a C-pole voltage value of the switch tube, and taking the C-pole voltage value as a sampling parameter value;
acquiring a first resonant frequency from the synchronous circuit, and taking the first resonant frequency as a sampling parameter value;
and acquiring a first current value from the current detection circuit, adjusting the first current value according to the grid voltage detection value to obtain a second current value, and taking the second current value as a sampling parameter value.
In the above method for detecting a pot, the transmitting the low power pulse signal a plurality of times at intervals of a second preset time, and the obtaining the first resonant frequency from the synchronous circuit includes:
acquiring a second resonance frequency from the synchronous circuit a plurality of times;
and calculating the average value of all the second resonant frequencies to obtain the first resonant frequency.
In the above method for detecting a pot, the sending the low power pulse signal for a plurality of times at intervals of a second preset time, and the obtaining a first current value from the current detection circuit includes:
acquiring a third current value from the current detection circuit for a plurality of times;
and calculating the average value of all the third current values to obtain a first current value.
In the above method for detecting a pot, the step of determining whether a pot exists on the electromagnetic heating device according to the number of synchronous turnover includes:
when the synchronous turnover number is smaller than a preset turnover number, judging that a pot exists;
when synchronous turnover number is more than or equal to and predetermines turnover number, judge that there is not pan or pan and exist unusually.
In the above-mentioned pot detection method, the judging whether the placement position of the pot is correct according to the sampling parameter value includes:
when the sampling parameter value is within a preset range, judging that the placement position of the cookware is correct;
when the sampling parameter value is outside the preset range, the placement position of the cookware is judged to be incorrect.
In the above pot detection method, further comprising:
controlling the electromagnetic heating device to start heating under the condition that the placement position of the pot is judged to be correct;
and under the condition that the placement position of the pot is judged to be incorrect, outputting a fault signal and controlling the electromagnetic heating device to stop heating.
In a second aspect, an embodiment of the present invention provides an electromagnetic heating apparatus, where the electromagnetic heating apparatus includes a pot detection circuit, where the pot detection circuit includes a controller, a power input terminal, a heating control circuit, a resonant circuit, and a synchronous circuit, where the controller is connected to the power input terminal, the heating control circuit, and the synchronous circuit, respectively, the resonant circuit is connected to the power input terminal, the heating control circuit, and the synchronous circuit, and the controller is configured to execute the pot detection method according to the first aspect.
The electromagnetic heating device provided by the embodiment of the invention at least has the following beneficial effects: sending a single pulse signal through the controller, acquiring the synchronous turnover number, primarily judging according to the synchronous turnover number, determining whether a cooker exists on the electromagnetic heating device, when determining that the cooker exists, sending a low-power pulse signal of first preset time to the heating control circuit, and simultaneously acquiring a sampling parameter value, accurately judging the position state of the cooker according to the sampling parameter value, and by combining the synchronous turnover number and the sampling parameter value, accurately detecting whether the placement position of the cooker is correct, thereby being beneficial to improving the use reliability of the electromagnetic heating device.
In a third aspect, an embodiment of the present invention provides an operation control apparatus, including at least one control processor and a memory, which is communicatively connected to the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the pot detection method as described above in the embodiments of the first aspect.
The operation control device provided by the embodiment of the invention at least has the following beneficial effects: through sending single pulse signal, acquire synchronous turnover number, carry out preliminary judgement according to synchronous turnover number, confirm whether there is the pan on the electromagnetic heating device, when confirming that there is the pan, send the low-power pulse signal of first preset time to heating control circuit again, acquire the sampling parameter value simultaneously, can carry out the position state of accurate judgement pan according to the sampling parameter value, through combining synchronous turnover number and sampling parameter value, can accurately detect placing the position of pan and whether correct, be favorable to improving the reliability that electromagnetic heating device used.
In a fourth aspect, embodiments of the present invention provide a computer-readable storage medium storing computer-executable instructions, where the computer-executable instructions are configured to enable a computer to perform the pot detection method described in the foregoing first aspect.
The computer-readable storage medium provided by the embodiment of the invention has at least the following beneficial effects: through sending single pulse signal, acquire synchronous turnover number, carry out preliminary judgement according to synchronous turnover number, confirm whether there is the pan on the electromagnetic heating device, when confirming that there is the pan, send the low-power pulse signal of first preset time to heating control circuit again, acquire the sampling parameter value simultaneously, can carry out the position state of accurate judgement pan according to the sampling parameter value, through combining synchronous turnover number and sampling parameter value, can accurately detect placing the position of pan and whether correct, be favorable to improving the reliability that electromagnetic heating device used.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The invention is further described below with reference to the accompanying drawings and examples;
fig. 1 is a circuit structure diagram of a pot detection circuit according to an embodiment of the present invention;
FIG. 2 is a flowchart of a pot detection method according to a second embodiment of the present invention;
FIG. 3 is a flow chart of a cookware detecting method according to a third embodiment of the present invention;
FIG. 4 is a flowchart of a cookware detecting method according to a fourth embodiment of the present invention;
FIG. 5 is a flowchart of a cookware detecting method according to a fifth embodiment of the invention;
FIG. 6 is a flowchart of a pot detection method according to a sixth embodiment of the present invention;
FIG. 7 is a flow chart of a cookware detecting method according to a seventh embodiment of the invention;
fig. 8 is a flowchart of a pot detection method according to an eighth embodiment of the present invention;
FIG. 9 is a flowchart illustrating a cookware detecting method according to a ninth embodiment of the present invention;
fig. 10 is a schematic structural diagram of an operation control apparatus according to a tenth embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.
It should be understood that in the description of the embodiments of the present invention, if there is any description of "first", "second", etc., it is only for the purpose of distinguishing technical features, and it is not to be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the precedence of the indicated technical features. "at least one" means one or more, "a plurality" means two or more. "at least one of the following" and similar expressions refer to any combination of these items, including any combination of singular or plural items.
Furthermore, unless expressly stated or limited otherwise, the term "coupled" is to be construed broadly, as meaning, for example, that it can be a fixed or movable connection, a removable or non-removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; may be directly connected or indirectly connected through an intermediate.
It should be noted that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different from that in the flowcharts. The technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
The embodiments of the present invention will be further explained with reference to the drawings.
The invention provides a pot detection method of an electromagnetic heating device, the electromagnetic heating device and a control device, which can accurately detect whether the placement position of a pot is correct or not and are beneficial to improving the use reliability of the electromagnetic heating device.
As shown in fig. 1, the electromagnetic heating device includes a pot detection circuit, the pot detection circuit includes a power input terminal 100, a heating control circuit 200, a resonant circuit 300 and a synchronous circuit 400, the heating control circuit 200 is provided with a switch tube, the resonant circuit 300 is respectively connected with the power input terminal 100, the heating control circuit 200 and the synchronous circuit 400, and the power input terminal 100 is used for providing a power supply of a power grid.
Specifically, the heating control circuit 200 is provided with a switch tube and a driving circuit 210, the switch tube is an IGBT, the driving circuit 210 is connected to the switch tube, the resonant circuit 300 includes an induction coil panel L1 and a resonant capacitor C1, which are connected in parallel, the synchronization circuit 400 is used for stepping down two signals output by the resonant circuit 300, and the synchronization circuit 400 includes a first resistor R2 and a second resistor R3.
It should be noted that the pan detecting circuit further includes a rectifier 700, and the rectifier 700 is connected to the power input terminal 100 and is used for converting the ac electrical signal from the power input terminal 100 into the dc electrical signal.
As shown in fig. 2, based on the pot detection circuit, an embodiment of the first aspect of the present invention provides a pot detection method of an electromagnetic heating apparatus, the pot detection method includes, but is not limited to, steps S110 to S160:
step S110: sending a single pulse signal to the heating control circuit to cause the resonant circuit to oscillate;
it should be noted that, firstly, a single pulse signal of 5-7us is sent, and the pulse signal is applied to the heating control circuit 200, so that the switch tube is turned on for a pulse time, and the induction coil panel L1 is charged to oscillate with the resonant capacitor C1 in a damping manner, i.e. the resonant circuit 300 oscillates.
Step S120: acquiring the synchronous turnover number from a synchronous circuit;
it is understood that after triggering a single pulse signal, the number of synchronous flips generated by the synchronous circuit 400 is obtained, and specifically, the number of synchronous flips is mainly calculated from the number of level flips generated by the first resistor R2 and the second resistor R3.
Step S130: judging whether a cooker exists on the electromagnetic heating device according to the synchronous turnover number;
it should be noted that, if placed the iron pan on the induction coil panel L1, then the oscillation damping grow of coupling, the oscillation time is short, produced synchronous turnover number is few, if do not place pan or pan size undersize or pan material on the induction coil panel L1 unsuitable, the oscillation damping of its coupling is less, oscillation time is long, produced synchronous turnover number is many, whether there is the pan on can tentatively judging electromagnetic heating device according to synchronous turnover number, be convenient for improve detection efficiency.
Step S140: under the condition that the cookware exists, sending a low-power pulse signal of a first preset time to a heating control circuit;
if the pan has been placed on the electromagnetic heating device, the low-power pulse signal of the first predetermined duration of resending is in order to open induction heating, the low-power pulse signal of a period of fixed time of opening in succession promptly, the data of being convenient for gather, it is required to explain that the monopulse time is generally about 7-10us, first predetermined duration is relatively short, generally 1-2ms, through sending short time continuous pulse, can avoid producing too big noise influence user's use experience and feel.
Step S150: acquiring a sampling parameter value, wherein the sampling parameter value is used for reflecting the position state of the cookware;
step S160: and judging whether the placement position of the cookware is correct or not according to the sampling parameter value.
Specifically, electromagnetic heating device heats mainly utilizes electromagnetic induction characteristic, because pan and induction coil panel L1 coupling characteristic are more stable, in case the position of placing of pan is incorrect, for example float high or skew etc. can change induction coil panel L1's coupling parameter to influence associative circuit's sampling parameter value, make sampling parameter value change, through obtaining sampling parameter value, can reflect the position state of pan, thereby can judge whether correct the position of placing of pan.
It can be understood that the correct placement of the cookware indicates that the placement of the cookware is within the preset heating area of the electromagnetic heating device.
According to the pot detection method of the electromagnetic heating device, the synchronous turnover number is obtained by sending a single pulse signal, initial judgment is carried out according to the synchronous turnover number, whether a pot exists on the electromagnetic heating device is determined, when the pot is determined to exist, a low-power pulse signal of first preset time is sent to the heating control circuit 200, a sampling parameter value is obtained, the position state of the pot can be accurately judged according to the sampling parameter value, whether the placement position of the pot is correct can be accurately detected by combining the synchronous turnover number and the sampling parameter value, and the use reliability of the electromagnetic heating device is improved.
It should be noted that, different from the means of detecting a structural mechanical switch in the prior art, the cookware detection method in the embodiment of the invention does not need to add an additional detection structure, thereby effectively reducing the design cost and the material cost.
In the above-mentioned pot detection method, the step S150 of obtaining the sampling parameter value includes at least one of the following steps:
step S151: acquiring a C-pole voltage value of a switch tube, and taking the C-pole voltage value as a sampling parameter value;
it should be noted that, the switch tube is the IGBT, the C utmost point voltage value of switch tube is IGBT's collecting electrode voltage value, the C utmost point and the second resistance R3 of switch tube are connected, through the C utmost point voltage value who acquires the switch tube, can reflect the position state of pan effectively, if the placement position of pan is correct, the coupling sense quantity is unanimous, then the C utmost point voltage value that detects can be stabilized in normal range, if the placement position of pan is incorrect (float height or skew etc.), can lead to the coupling sense quantity grow, C utmost point voltage value uprises, can exceed normal range value, judge whether correct the placement position of pan is correct according to C utmost point voltage value, can improve the accuracy that detects greatly.
Step S152: acquiring a first resonant frequency from a synchronous circuit, and taking the first resonant frequency as a sampling parameter value;
specifically, first resonant frequency is calculated through first resistance R2 and second resistance R3 in synchronous circuit 400, if the placement position of pan is incorrect, can lead to coupling inductance grow, then first resonant frequency step-down, can not reach normal range value, because resonant frequency can not receive peripheral factor influence such as mains voltage, only relevant with pan coupling coefficient, through acquireing first resonant frequency, can reflect the position state of pan effectively, judge that the reliability is high.
It should be noted that, the pot detection circuit further includes a current detection circuit 500 and a voltage detection circuit 600, the current detection circuit 500 is disposed between the power input terminal 100 and the resonant circuit 300, the voltage detection circuit 600 is connected to the power input terminal 100, and the voltage detection circuit 600 is configured to obtain a grid voltage detection value from the power input terminal 100. The current detection circuit 500 includes a sampling resistor RJ1 and a sampling capacitor C3 connected in parallel.
Step S153: and acquiring a first current value from the current detection circuit, adjusting the first current value according to the grid voltage detection value to obtain a second current value, and taking the second current value as a sampling parameter value.
It should be noted that the voltage detection value is obtained by voltage division and sampling of the third resistor R4, the fourth resistor R5 and the fifth resistor R6, and the real-time voltage detection value of the power grid can be effectively reflected. If the position of placing of pan is correct, the first current value that detects can be stabilized in normal range, if the position of placing of pan is incorrect, first current value does not reach normal range value, through acquireing first current value to carry out corresponding adjustment value according to real-time electric wire netting voltage detection value, obtain the second current value after the adjustment, avoid in same pulse width time, the electric current difference that electric wire netting voltage difference caused, can effectively improve the reliability of sampling parameter value.
As shown in fig. 3, in the above-mentioned pot detection method, the low power pulse signal is transmitted a plurality of times at intervals of a second preset time, and the first resonant frequency from the synchronous circuit is obtained in step S152, which includes but is not limited to step S210 and step S220:
step S210: acquiring a second resonant frequency from the synchronous circuit for a plurality of times;
step S220: and calculating the average value of all the second resonant frequencies to obtain the first resonant frequency.
It should be noted that, by sending a low-power pulse signal to the heating control circuit 200 continuously for multiple times, each time, the synchronization circuit 400 acquires the second resonant frequency, accumulates the second resonant frequencies acquired multiple times and calculates an average value to obtain the first resonant frequency, and by using the calculated first resonant frequency as a sampling parameter value, the reliability of the sampling parameter value can be effectively improved, thereby improving the accuracy of detection. Specifically, the low-power pulses are continuously turned on for three times, and each time interval is 0.5-1s, three second resonance frequencies can be obtained, and the first resonance frequency is obtained by calculating the average value of the three second resonance frequencies.
As shown in fig. 4, in the pot detection method, the low power pulse signal is transmitted a plurality of times at intervals of a second preset time, and the first current value from the current detection circuit is obtained in step S153, which includes but is not limited to step S310 and step S320:
step S310: acquiring a third current value from the current detection circuit for a plurality of times;
step S320: and calculating the average value of all the third current values to obtain the first current value.
It should be noted that, by sending a low-power pulse signal to the heating control circuit 200 for a plurality of times continuously, a third current value is obtained by the current detection circuit 500 each time, the third current values obtained for a plurality of times are accumulated, and an average value is calculated to obtain the first current value, so that the reliability of the sampling parameter value can be effectively improved, and the detection accuracy is improved. Specifically, three times of low-power pulses are continuously turned on, and each time interval is 0.5-1s, three third current values can be obtained, the average value of the three third current values is calculated to obtain a first current value, the first current value is adjusted according to the power grid voltage detection value to obtain a second current value, and the second current value is used as a sampling parameter value.
As shown in fig. 5, in the pot detection method, the step S130 of determining whether a pot exists on the electromagnetic heating device according to the synchronous turnover number includes, but is not limited to, the steps S410 and S420:
step S410: when the synchronous turning number is smaller than the preset turning number, judging that a pot exists;
step S420: when the synchronous turnover number is larger than or equal to the preset turnover number, the condition that no cookware exists or the cookware is abnormal is judged.
It should be noted that, if placed the iron pan on the induction coil panel L1, then the oscillation damping grow of coupling, oscillation time is short, and produced synchronous turnover number is few, if do not place pan or pan size undersize on induction coil panel L1 or pan material when unsuitable, the oscillation damping of its coupling is less, and oscillation time is long, and produced synchronous turnover number is many. The preset turning number is obtained through a plurality of experiments, when the synchronous turning number is smaller than the preset turning number, the existence of a pot is judged, when the synchronous turning number is larger than or equal to the preset turning number, the existence of the abnormal state of the pot or the pot is judged, a fault signal is output, whether the pot exists on the electromagnetic heating device or not can be preliminarily judged according to the synchronous turning number, and the detection efficiency is favorably improved.
As shown in fig. 6, in the pot detection method, the step S160 of determining whether the placing position of the pot is correct according to the sampling parameter value includes, but is not limited to, the steps S510 and S520:
step S510: when the sampling parameter value is within a preset range, judging that the placement position of the cookware is correct;
step S520: when the sampling parameter value is outside the preset range, the placing position of the cookware is judged to be incorrect.
It should be noted that, if the sampling parameter value is within the preset range, it indicates that the sampling parameter value reaches the normal range value, and determines that the placement position of the pot is correct, and if the sampling parameter value is outside the preset range, it indicates that the sampling parameter value is not the normal range value, and determines that the placement position of the pot is incorrect. By setting the preset range, the sampling parameter value is allowed to be within a certain fluctuation range, and the judgment basis is more flexible. It will be appreciated that a value of the sampled parameter outside the preset range may indicate that the value of the sampled parameter is greater than the normal range value or less than the normal range value.
In the above pot detection method, further comprising:
under the condition that the placement position of the pot is judged to be correct, controlling the electromagnetic heating device to start heating;
and under the condition that the placement position of the cookware is not correct, outputting a fault signal and controlling the electromagnetic heating device to stop heating.
It can be understood that if the position of placing of pan is correct, then can control electromagnetic heating device and begin normal heating, guarantee the stability of electromagnetic heating device work, if the position of placing of pan is incorrect, output fault signal and control electromagnetic heating device stop heating, can effectively protect electromagnetic heating device and pan.
As shown in fig. 7 to 9, in an embodiment, when the electromagnetic heating device is started, the pot detection operation is started, a single pulse signal is sent to obtain the synchronous turnover number, the preset turnover number is 7, when the synchronous turnover number is greater than or equal to 7, it indicates that no pot exists or the pot is abnormal, a fault is reported, when the synchronous turnover number is less than 7, it indicates that the pot exists, a low-power pulse signal of 2ms is sent to obtain sampling parameter values (a C-pole voltage value, a first resonant frequency, and a second current value), if the sampling parameter values are within a preset range, it indicates that the placement position of the pot is correct, normal heating is started, and if the sampling parameter values are outside the preset range, it indicates that the placement position of the pot is incorrect, a fault is reported, and heating is stopped.
The embodiment of the second aspect of the present invention provides an electromagnetic heating apparatus, which includes a pot detection circuit, the pot detection circuit includes a controller MCU, a power input terminal 100, a heating control circuit 200, a resonant circuit 300 and a synchronous circuit 400, the controller MCU is respectively connected to the power input terminal 100, the heating control circuit 200 and the synchronous circuit 400, the resonant circuit 300 is respectively connected to the power input terminal 100, the heating control circuit 200 and the synchronous circuit 400, and the controller MCU is configured to execute the pot detection method according to the embodiment of the first aspect. For example, the above-described method steps S110 to S160 in fig. 2, method steps S210 and S220 in fig. 3, method steps S310 and S320 in fig. 4, method steps S410 and S420 in fig. 5, and method steps S510 and S520 in fig. 6 are performed. Send single pulse signal through controller MCU, acquire synchronous turnover number, carry out the preliminary judgement according to synchronous turnover number, confirm whether there is the pan on the electromagnetic heating device, when confirming that there is the pan, send the low-power pulse signal of first preset time to heating control circuit 200 again, acquire the sampling parameter value simultaneously, can carry out the position state of accurate judgement pan according to the sampling parameter value, through combining synchronous turnover number and sampling parameter value, can accurately detect placing the position of pan and whether correct, be favorable to improving the reliability that electromagnetic heating device used.
It should be noted that the electromagnetic heating device can be a product that heats by utilizing electromagnetic induction characteristics, such as an induction cooker and a cooking machine, and needs to be used with a special pot.
As shown in fig. 10, a third embodiment of the present invention provides an operation control apparatus 1000, which includes at least one control processor 1010 and a memory 1020 for communication connection with the at least one control processor 1010; the control processor 1010 and the memory 1020 may be connected by a bus or other means, an example of which is shown in fig. 10 by a bus, the memory 1020 stores instructions executable by the at least one control processor 1010, the instructions being executed by the at least one control processor 1010 to enable the at least one control processor 1010 to perform the pot detection method as described above in the first aspect of the embodiments. For example, the above-described method steps S110 to S160 in fig. 2, the method steps S210 and S220 in fig. 3, the method steps S310 and S320 in fig. 4, the method steps S410 and S420 in fig. 5, and the method steps S510 and S520 in fig. 6 are performed. By sending a single pulse signal, obtaining the synchronous turnover number, carrying out primary judgment according to the synchronous turnover number, determining whether a cooker exists on the electromagnetic heating device, when determining that the cooker exists, sending a low-power pulse signal of a first preset time to the heating control circuit 200, and simultaneously obtaining a sampling parameter value, accurately judging the position state of the cooker according to the sampling parameter value, and by combining the synchronous turnover number and the sampling parameter value, accurately detecting whether the placement position of the cooker is correct, which is beneficial to improving the reliability of the use of the electromagnetic heating device.
A fourth aspect embodiment of the present invention provides a computer-readable storage medium storing computer-executable instructions, which may be used to cause a computer to perform the pot detection method as described above in the first aspect embodiment, for example, performing the above-described method steps S110 to S160 in fig. 2, method steps S210 and S220 in fig. 3, method steps S310 and S320 in fig. 4, method steps S410 and S420 in fig. 5, and method steps S510 and S520 in fig. 6. By sending a single pulse signal, obtaining the synchronous turnover number, carrying out primary judgment according to the synchronous turnover number, determining whether a cooker exists on the electromagnetic heating device, when determining that the cooker exists, sending a low-power pulse signal of a first preset time to the heating control circuit 200, and simultaneously obtaining a sampling parameter value, accurately judging the position state of the cooker according to the sampling parameter value, and by combining the synchronous turnover number and the sampling parameter value, accurately detecting whether the placement position of the cooker is correct, which is beneficial to improving the reliability of the use of the electromagnetic heating device.
It will be understood by those of ordinary skill in the art that all or some of the steps, systems, and methods disclosed above may be implemented as software, firmware, hardware, or suitable combinations thereof. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media or non-transitory media and communication media or transitory media. The term computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data as is well known to those of ordinary skill in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks, DVD, or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can accessed by a computer. In addition, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media as known to those skilled in the art.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Claims (10)
1. The utility model provides an electromagnetic heating device's pan detection method, its characterized in that, electromagnetic heating device is including examining pot circuit, it includes power input end, heating control circuit, resonant circuit and synchronous circuit to examine pot circuit, heating control circuit is provided with the switch tube, pan detection method includes:
sending a single pulse signal to the heating control circuit to oscillate the resonant circuit;
acquiring the synchronous turnover number from the synchronous circuit;
judging whether a cooker exists on the electromagnetic heating device or not according to the synchronous turnover number;
sending a low-power pulse signal of a first preset time to the heating control circuit under the condition of judging that the cookware exists;
acquiring a sampling parameter value, wherein the sampling parameter value is used for reflecting the position state of the cookware;
and judging whether the placement position of the pot is correct or not according to the sampling parameter value.
2. The pot detection method according to claim 1, wherein the pot detection circuit further comprises a current detection circuit and a voltage detection circuit, the current detection circuit is disposed between the power input terminal and the resonant circuit, the voltage detection circuit is configured to obtain a grid voltage detection value from the power input terminal, and the obtaining of the sampling parameter value comprises at least one of:
acquiring a C-pole voltage value of the switch tube, and taking the C-pole voltage value as a sampling parameter value;
acquiring a first resonant frequency from the synchronous circuit, and taking the first resonant frequency as a sampling parameter value;
and acquiring a first current value from the current detection circuit, adjusting the first current value according to the grid voltage detection value to obtain a second current value, and taking the second current value as a sampling parameter value.
3. The pot detection method according to claim 2, wherein the sending of the low power pulse signal a plurality of times with a second preset time interval, and the obtaining of the first resonant frequency from the synchronous circuit comprises:
acquiring a second resonance frequency from the synchronous circuit a plurality of times;
and calculating the average value of all the second resonant frequencies to obtain the first resonant frequency.
4. The pot detection method according to claim 2, wherein the sending of the low power pulse signal at a second preset time interval for a plurality of times, and the obtaining of the first current value from the current detection circuit comprises:
acquiring a third current value from the current detection circuit for a plurality of times;
and calculating the average value of all the third current values to obtain a first current value.
5. The method for detecting cookware according to claim 1, wherein said determining whether cookware exists on the electromagnetic heating device according to the number of turns comprises:
when the synchronous turning number is smaller than a preset turning number, judging that a pot exists;
when the synchronous turnover number is larger than or equal to the preset turnover number, the condition that no cookware exists or the cookware is abnormal is judged.
6. The method for detecting the cookware according to claim 1, wherein the step of determining whether the placement position of the cookware is correct according to the sampling parameter value comprises:
when the sampling parameter value is within a preset range, judging that the placement position of the cookware is correct;
when the sampling parameter value is outside the preset range, the placement position of the cookware is judged to be incorrect.
7. The pot detection method according to claim 6, further comprising:
controlling the electromagnetic heating device to start heating under the condition that the placement position of the pot is judged to be correct;
and under the condition that the placement position of the pot is judged to be incorrect, outputting a fault signal and controlling the electromagnetic heating device to stop heating.
8. An electromagnetic heating device, characterized in that, the electromagnetic heating device includes a pot detection circuit, the pot detection circuit includes a controller, a power input terminal, a heating control circuit, a resonance circuit and a synchronization circuit, the controller is respectively connected with the power input terminal, the heating control circuit and the synchronization circuit, the resonance circuit is respectively connected with the power input terminal, the heating control circuit and the synchronization circuit, the controller is used for executing the pot detection method according to any one of claims 1 to 7.
9. An operation control apparatus comprising at least one control processor and a memory for communicative connection with the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the pot detection method of any one of claims 1 to 7.
10. A computer-readable storage medium storing computer-executable instructions for causing a computer to perform the pot detection method according to any one of claims 1 to 7.
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| CN202210585421.XA CN115031264A (en) | 2022-05-27 | 2022-05-27 | Pot detection method of electromagnetic heating device, electromagnetic heating device and control device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117137342A (en) * | 2023-10-31 | 2023-12-01 | 佛山市艾燊电器有限公司 | Safety control method and device of cooking pot, electronic equipment and storage medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117137342A (en) * | 2023-10-31 | 2023-12-01 | 佛山市艾燊电器有限公司 | Safety control method and device of cooking pot, electronic equipment and storage medium |
| CN117137342B (en) * | 2023-10-31 | 2024-01-05 | 佛山市艾燊电器有限公司 | Safety control method and device of cooking pot, electronic equipment and storage medium |
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