Electromagnetic heating device and relay fault detection method and device thereof

Abstract

The application discloses an electromagnetic heating device and a relay fault detection method and device thereof, wherein the method comprises the following steps: controlling multiple relays to be all disconnected, and outputting a heating control signal to a half-bridge power module to drive a resonant heating module in a power-on state to perform resonant work; acquiring an output current of the half-bridge power module, and performing sticking fault detection on the multiple relays according to the output current; when it is determined that the multiple relays all have no sticking fault, controlling each relay to be attracted in turn, and outputting the heating control signal to the half-bridge power module to drive the resonant heating module in the power-on state to perform resonant work; acquiring the output current of the half-bridge power module, and performing attraction fault detection on each relay according to the output current. Thus, the sticking and attraction faults of the relays before the electromagnetic heating device is heated can be detected, so that the safety of the electromagnetic heating device is effectively improved, and safety accidents can be prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electromagnetic heating, and in particular to an electromagnetic heating device and a relay fault detection method and device thereof. BACKGROUND

[0002] A relay is a controlled switching component, which turns on or off a switching circuit according to a received control signal to achieve the purpose of controlling the load.

[0003] In a half-bridge electromagnetic heating system, a relay is usually used to control the connection or disconnection of a resonant heating unit to a half-bridge power supply, so as to realize the driving of multiple resonant heating units by one half-bridge power supply. However, since the relay is a large-current mechanical switching device, it is prone to failure, and its failure modes are two: one is that the relay receives a turn-off signal but cannot execute, i.e., the relay contacts are stuck and cannot be disconnected, and always remain in the on state; the other is that the relay receives a turn-on signal but cannot execute, i.e., the relay contacts cannot be attracted, and always remain in the off state.

[0004] The existing electromagnetic heating system does not have a relay fault detection function, so when the above-mentioned faults occur, it is easy to cause safety accidents or even catastrophic events, and the safety of the electromagnetic heating system is poor. SUMMARY

[0005] The present application aims to at least solve one of the technical problems in the related art. To this end, the first object of the present application is to provide a relay fault detection method for an electromagnetic heating device, which can detect whether the relay has a sticking and attraction failure, thereby improving the safety of the electromagnetic heating device.

[0006] The second object of the present application is to provide a computer-readable storage medium.

[0007] The third object of the present application is to provide an electromagnetic heating device.

[0008] The fourth object of the present application is to provide a relay fault detection device for an electromagnetic heating device.

[0009] The fifth object of the present application is to provide a heating control system for an electromagnetic heating device.

[0010] To achieve the above object, the first aspect of the present application provides a relay fault detection method of an electromagnetic heating device, the electromagnetic heating device comprising a plurality of resonant heating modules, a plurality of relays and a half-bridge power supply module, each of the plurality of relays corresponding to control whether a resonant heating module is powered on, and the half-bridge power supply module being configured to provide resonant power to each resonant heating module, wherein the relay fault detection method comprises the following steps: controlling the plurality of relays to be all disconnected, and outputting a heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant operation; obtaining an output current of the half-bridge power supply module, and performing adhesion fault detection on the plurality of relays according to the output current of the half-bridge power supply module; when it is determined that the plurality of relays have no adhesion fault, controlling each relay to be attracted in turn, and outputting a heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant operation; and obtaining an output current of the half-bridge power supply module, and performing attraction fault detection on each relay according to the output current of the half-bridge power supply module.

[0011] According to the relay fault detection method of the electromagnetic heating device, by controlling the plurality of relays to be all disconnected, and outputting a heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant operation, while obtaining an output current of the half-bridge power supply module, and performing adhesion fault detection on the plurality of relays according to the output current of the half-bridge power supply module, then when it is determined that the plurality of relays have no adhesion fault, controlling each relay to be attracted in turn, and outputting a heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant operation, while obtaining an output current of the half-bridge power supply module, and performing attraction fault detection on each relay according to the output current of the half-bridge power supply module. Thus, the adhesion and attraction faults of the relays can be detected before the electromagnetic heating device is heated, which provides a strong guarantee for whether the electromagnetic heating device can continue to be safely heated, thereby effectively improving the safety of the electromagnetic heating device, and helping to prevent safety accidents caused thereby.

[0012] In one embodiment of the present application, the adhesion fault detection on the plurality of relays according to the output current of the half-bridge power supply module comprises: judging whether the output current of the half-bridge power supply module is zero; if the output current of the half-bridge power supply module is zero, it is determined that the plurality of relays have no adhesion fault; and if the output current of the half-bridge power supply module is not zero, it is determined that there is an adhesion fault relay in the plurality of relays.

[0013] In one embodiment of the present application, the pull-in fault detection of each relay according to the output current of the half-bridge power module comprises: judging whether the output current of the half-bridge power module is zero; if the output current of the half-bridge power module is zero, determining that the currently pulled-in relay has a pull-in fault; and if the output current of the half-bridge power module is not zero, determining that the currently pulled-in relay has no pull-in fault.

[0014] In one embodiment of the present application, the control of the pull-in of each relay in turn comprises: controlling the pull-in of a current relay in the plurality of relays, and controlling the disconnection of other relays in the plurality of relays.

[0015] To achieve the above object, the second aspect of the present application provides a computer readable storage medium, which has stored thereon a relay fault detection program of an electromagnetic heating device, and the relay fault detection program of the electromagnetic heating device, when executed by a processor, implements the above-mentioned relay fault detection method of the electromagnetic heating device.

[0016] The computer readable storage medium according to the embodiment of the present application, since the relay fault detection program of the electromagnetic heating device is stored on the storage medium, and the program, when executed by the processor, implements the above-mentioned relay fault detection method of the electromagnetic heating device. Thus, the adhesion and pull-in fault detection of the relay before the heating of the electromagnetic heating device can be realized, which provides a strong guarantee for whether the safe heating can be continued, thereby effectively improving the safety of the electromagnetic heating device and helping to prevent the resulting safety accidents.

[0017] To achieve the above object, the third aspect of the present application provides an electromagnetic heating device, which comprises a memory, a processor, and a relay fault detection program of the electromagnetic heating device stored on the memory and executable on the processor, and the relay fault detection program of the electromagnetic heating device, when executed by the processor, implements the above-mentioned relay fault detection method of the electromagnetic heating device.

[0018] The electromagnetic heating device according to the embodiment of the present application, since it comprises a memory, a processor, and a relay fault detection program of the electromagnetic heating device stored on the memory and executable on the processor, the relay fault detection program of the electromagnetic heating device, when executed by the processor, implements the above-mentioned relay fault detection method of the electromagnetic heating device. Thus, the adhesion and pull-in fault detection of the relay before the heating of the electromagnetic heating device can be realized, which provides a strong guarantee for whether the safe heating can be continued, thereby effectively improving the safety of the electromagnetic heating device and helping to prevent the resulting safety accidents.

[0019] To achieve the above object, the fourth aspect of the present application provides a relay fault detection device of an electromagnetic heating device, the electromagnetic heating device comprising a plurality of resonant heating modules, a plurality of relays and a half-bridge power supply module, each of the plurality of relays corresponding to control whether a resonant heating module is powered on, and the half-bridge power supply module being configured to provide resonant power to each resonant heating module, wherein the relay fault detection device comprises: a control module configured to control the plurality of relays to be all disconnected, and output a heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant work; a first fault detection module configured to obtain an output current of the half-bridge power supply module, and perform a sticking fault detection on the plurality of relays according to the output current of the half-bridge power supply module; the control module is further configured to, when the plurality of relays are all free from sticking faults, control each relay to be attracted in turn, and output the heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant work; and a second fault detection module configured to obtain the output current of the half-bridge power supply module, and perform an attraction fault detection on each relay according to the output current of the half-bridge power supply module.

[0020] The relay fault detection device of the electromagnetic heating device according to the embodiment of the present application, by the control module controlling the plurality of relays to be all disconnected, and outputting the heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant work, and by the first fault detection module obtaining the output current of the half-bridge power supply module, so as to perform the sticking fault detection on the plurality of relays according to the output current of the half-bridge power supply module, and by the control module controlling each relay to be attracted in turn when the plurality of relays are all free from sticking faults, and outputting the heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the powered-on state to perform resonant work, and by the second fault detection module obtaining the output current of the half-bridge power supply module, and performing the attraction fault detection on each relay according to the output current of the half-bridge power supply module. Therefore, the sticking and attraction faults of the relays before the electromagnetic heating device is heated can be detected, which provides a strong guarantee for whether the electromagnetic heating device can continue to be safely heated, thereby effectively improving the safety of the electromagnetic heating device, and helping to prevent safety accidents caused thereby.

[0021] To achieve the above object, the fifth aspect of the present application provides a heating control system of an electromagnetic heating device, comprising a plurality of resonant heating modules; a plurality of relays, each of the plurality of relays corresponding to control whether a resonant heating module is powered on; a half-bridge power supply module, the half-bridge power supply module being used to provide a resonant power supply to each resonant heating module; a control module, the control module being used to output a disconnection control signal to each relay to control the plurality of relays to be disconnected, and output a heating control signal to the half-bridge power supply module to drive the resonant heating module in the powered-on state to perform resonant work through the half-bridge power supply module; a current detection module, the current detection module being used to detect the output current of the half-bridge power supply module; the control module is further used to, when the plurality of relays are determined to have no sticking fault according to the output current of the half-bridge power supply module, control each relay to be attracted in turn, and output the heating control signal to the half-bridge power supply module to drive the resonant heating module in the powered-on state to perform resonant work through the half-bridge power supply module, and perform attraction fault detection on each relay according to the output current of the half-bridge power supply module.

[0022] The heating control system of the electromagnetic heating device according to the embodiment of the present application, by the control module outputting the disconnection control signal to each relay to control the plurality of relays to be disconnected, and outputting the heating control signal to the half-bridge power supply module to drive the resonant heating module in the powered-on state to perform resonant work through the half-bridge power supply module, and by the current detection module detecting the output current of the half-bridge power supply module, and by the control module performing the sticking fault detection on the plurality of relays according to the output current of the half-bridge power supply module to determine that the plurality of relays have no sticking fault, and then controlling each relay to be attracted in turn, and outputting the heating control signal to the half-bridge power supply module to drive the resonant heating module in the powered-on state to perform resonant work through the half-bridge power supply module, and performing the attraction fault detection on each relay according to the output current of the half-bridge power supply module. Therefore, the sticking and attraction fault detection of the relays before the electromagnetic heating device is heated can be realized, which provides strong guarantee for whether the safe heating can continue, thereby effectively improving the safety of the electromagnetic heating device and helping to prevent the safety accidents caused thereby.

[0023] In an embodiment of the present application, when the control module performs the sticking fault detection on the plurality of relays according to the output current of the half-bridge power supply module, it is judged whether the output current of the half-bridge power supply module is zero. If the output current of the half-bridge power supply module is zero, it is determined that the plurality of relays have no sticking fault; if the output current of the half-bridge power supply module is not zero, it is determined that there is a relay with sticking fault in the plurality of relays.

[0024] In one embodiment of the present application, when the control module performs the pull-in fault detection on each relay according to the output current of the half-bridge power module, the control module determines whether the output current of the half-bridge power module is zero. If the output current of the half-bridge power module is zero, it is determined that the currently pulled-in relay has a pull-in fault; if the output current of the half-bridge power module is not zero, it is determined that the currently pulled-in relay has no pull-in fault.

[0025] In one embodiment of the present application, when the control module controls each relay to be pulled in in turn, the control module controls the current relay in the plurality of relays to be pulled in and controls the other relays in the plurality of relays to be all turned off.

[0026] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 FIG. 1 is a schematic diagram of a heating control system of an electromagnetic heating device according to one embodiment of the present application;

[0028] Figure 2 FIG. 2 is a flowchart of a relay fault detection method of an electromagnetic heating device according to one embodiment of the present application;

[0029] Figure 3 FIG. 3 is a flowchart of a relay fault detection method of an electromagnetic heating device according to another embodiment of the present application;

[0030] Figure 4 FIG. 4 is a schematic diagram of an electromagnetic heating device according to one embodiment of the present application;

[0031] Figure 5 FIG. 5 is a schematic diagram of a relay fault detection device of an electromagnetic heating device according to one embodiment of the present application. DETAILED DESCRIPTION

[0032] Embodiments of the present application are described in detail below with reference to the accompanying drawings, in which like reference numerals indicate like elements or elements having the same or similar function throughout the several views. The embodiments described below are examples in which the present application is applied, and are intended to explain the present application, and should not be understood as limiting the present application.

[0033] The relay fault detection method, the computer readable storage medium, the electromagnetic heating device, the relay fault detection device of the electromagnetic heating device, and the heating control system of the electromagnetic heating device provided by the embodiments of the present application are described below with reference to the accompanying drawings.

[0034] In the present application, the electromagnetic heating device includes but is not limited to a cooking device, a heating device, and a drying device heated by electromagnetism. As shown in FIG. 1, the electromagnetic heating device 100 includes a heating control system 110 and a plurality of relays 120.Figure 1 As shown, the electromagnetic heating device includes a plurality of resonant heating modules 110, a plurality of relays 120, and a half-bridge power supply module 130. Each of the plurality of relays 120 controls whether one of the resonant heating modules 110 is powered on. The half-bridge power supply module 130 is configured to provide resonant power to each of the resonant heating modules 110.

[0035] Specifically, each of the resonant heating modules 110 can include a coil disc L and a resonant capacitor C for resonant heating. The control module 140 can be a controller configured to send a heating control signal such as a PWM (Pulse Width Modulation) signal and send a switching control signal (such as a release control signal and a pull-in control signal) of the relays 120, and receive an output signal of the current detection module 150. The half-bridge power supply module 130 is configured to receive the heating control signal output by the control module 140, drive the resonant heating module 110 to work in resonance through the current detection module 150 and the relays 120. The current detection module 150 is configured to sample an alternating current signal output by the half-bridge power supply module 130 and convert it into a direct current signal for transmission to the control module 140. In this embodiment, the current detection module 150 includes a current transformer 151 and a conversion module 152. The current transformer 151 is configured to convert the alternating current signal of tens of amperes output by the half-bridge power supply module 130 into an alternating current signal of tens of milliamperes. The conversion module 152 is configured to convert the alternating current signal output by the current transformer 151 into a direct current voltage or a digital switching signal and send it to the control module 140.

[0036] Figure 2 As shown in the flowchart of the relay fault detection method of the electromagnetic heating device according to an embodiment of the present application, the relay fault detection method of the electromagnetic heating device can include the following steps: Figure 2

[0037] Step S201: Control the plurality of relays to be all released, and output a heating control signal to the half-bridge power supply module to drive the resonant heating module in the powered-on state to work in resonance through the half-bridge power supply module.

[0038] Step S202: Obtain the output current of the half-bridge power supply module, and perform a sticking fault detection on the plurality of relays according to the output current of the half-bridge power supply module.

[0039] Specifically, as shown in Figure 1 ​As shown, the adhesion fault detection of the plurality of relays can be performed first. In the detection, the plurality of relays 120 are first controlled to be all disconnected. The disconnection can be realized by the control module 140 outputting a disconnection control signal to each relay 120. For example, the S1, S2, …, Sn pins of the control module 140 all output invalid levels (such as 0V), and the plurality of relays 120 control pins receive the invalid levels (such as 0V) to disconnect. Then, the control module 140 outputs a heating control signal such as a PWM signal to the half-bridge power supply module 130, so that the two switching tubes Q1 and Q2 in the half-bridge power supply module 130 are alternately turned on, thereby driving the resonant heating module 110 in the power-on state to perform resonant heating. At this time, for the resonant heating module 110 in the power-on state, the reason for being in the power-on state is that the corresponding relay 120 has an adhesion fault. At the same time, the output current of the half-bridge power supply module 130 is obtained by the current detection module 150, and the adhesion fault detection of the plurality of relays 120 is performed according to the output current. In a specific implementation, the output current of the half-bridge power supply module 130 can be detected to determine whether there is a current feedback signal. If there is a current feedback signal, it indicates that the relay has an adhesion fault. If there is no current feedback signal, it indicates that the relay has no adhesion fault.

[0040] In one embodiment, the adhesion fault detection of the plurality of relays according to the output current of the half-bridge power supply module includes: judging whether the output current of the half-bridge power supply module is zero; if the output current of the half-bridge power supply module is zero, it is determined that the plurality of relays all have no adhesion fault; and if the output current of the half-bridge power supply module is not zero, it is determined that there is a relay with an adhesion fault in the plurality of relays.

[0041] That is, if the plurality of relays 120 all have no adhesion fault, since the plurality of relays 120 are all disconnected, all the resonant heating modules 110 are not connected to the current detection module 150, and the output end of the half-bridge power supply module 130 has no load, so that the output current of the half-bridge power supply module 130 is zero, and the output end of the current detection module 150 has no signal output. At this time, the control module 140 recognizes that the relay 120 has no adhesion fault. If at least one relay 120 has an adhesion fault, at least one resonant heating module 110 is connected to the current detection module 150, so that the output current of the half-bridge power supply module 130 is not zero, and the output end of the current detection module 150 has a signal output. At this time, the control module 140 recognizes that the relay 120 has an adhesion fault.

[0042] Step S203: When it is determined that the plurality of relays all have no adhesion fault, each relay is controlled to be attracted in turn, and a heating control signal is output to the half-bridge power supply module to drive the resonant heating module in the power-on state to perform resonant work through the half-bridge power supply module.

[0043] Step S204: Obtain the output current of the half-bridge power supply module, and perform the pull-in fault detection on each relay according to the output current of the half-bridge power supply module.

[0044] Specifically, as shown in FIG. 2, after confirming that the plurality of relays 120 are free from the sticking fault, the pull-in fault detection is performed on the plurality of relays 120. During the detection, each relay 120 is controlled to be pulled in in turn, and a heating control signal is output to the half-bridge power supply module 130, so as to drive the resonant heating module 110 in the powered state to perform the resonant operation through the half-bridge power supply module 130, and the output current of the half-bridge power supply module 130 is obtained, and the pull-in fault detection is performed on each relay 120 according to the output current of the half-bridge power supply module 130. Figure 1 In one embodiment, the control of the pull-in of each relay in turn includes: controlling the pull-in of a current relay in the plurality of relays, and controlling the disconnection of the other relays in the plurality of relays.

[0045] That is, when the pull-in fault detection is performed on a certain relay 120, the relay 120 is controlled to be pulled in, and the other relays 120 are controlled to be disconnected, and a heating control signal such as a PWM signal is output to the half-bridge power supply module 130, so as to drive the resonant heating module 110 in the powered state to perform the resonant operation through the half-bridge power supply module 130, where the resonant heating module 110 in the powered state is the resonant heating module 110 corresponding to the relay 120 in the pulled-in state. At the same time, the output current of the half-bridge power supply module 130 is obtained through the current detection module 150, and the pull-in fault detection is performed on the relay 120 according to the output current. In a specific implementation, the obtaining of the output current of the half-bridge power supply module 130 can be the detection of whether there is a current feedback signal. If there is a current feedback signal, it indicates that the relay has no pull-in fault; if there is no current feedback signal, it indicates that the relay has a pull-in fault.

[0046] In one embodiment, the pull-in fault detection on each relay according to the output current of the half-bridge power supply module includes: judging whether the output current of the half-bridge power supply module is zero; if the output current of the half-bridge power supply module is zero, it is determined that the currently pulled-in relay has a pull-in fault; and if the output current of the half-bridge power supply module is not zero, it is determined that the currently pulled-in relay has no pull-in fault.

[0047]

[0048] ​That is, in the case where none of the plurality of relays 120 has a sticking fault, the control controls one of the relays 120 to be attracted, for example, the S1 pin of the control module 140 outputs a valid level (e.g. 5V), and outputs a heating control signal to the half-bridge power module 130, so that the switch tubes Q1 and Q2 in the half-bridge power module 130 are alternately turned on. If the relay 120 is normally attracted, the resonant heating module 110 corresponding to the relay 120 will be connected to the current detection module 150, the output current of the half-bridge power module 130 is not zero, and the output end of the current detection module 150 has a signal output. At this time, the control module 140 identifies that the relay 120 has no attraction fault. If the relay 120 has an attraction fault, all resonant heating modules 110 are not connected to the current detection module 150, and the output end of the half-bridge power module 130 has no load, so that the output current of the half-bridge power module 130 is zero, and the output end of the current detection module 150 has no signal output. At this time, the control module 140 identifies that the relay 120 has an attraction fault.

[0049] After the attraction fault detection of the relay is completed, the attraction fault detection of the other relays to be detected is performed in the above steps in turn, which will not be described here.

[0050] In an embodiment, as shown in FIG. 2, before the relay fault detection, that is, before step S201, step S200 of controlling the heating permission flag to be cleared can also be included. After the relay fault detection, that is, after step S204, step S205 of setting the heating permission flag to 1 after confirming that the plurality of relays of the electromagnetic heating device have no sticking fault and attraction fault can also be included. Figure 3

[0051] That is, before the relay fault detection, the heating permission flag is cleared first to prohibit the electromagnetic heating device from performing the heating work, so as to prevent the heating work in the case of relay fault from causing a safety accident. Then, the plurality of relays are detected for the sticking fault in the foregoing manner, and after all the relays have no sticking fault, the plurality of relays are detected for the attraction fault in the foregoing manner, and after all the relays have no attraction fault, the heating permission flag is set to 1 to allow the electromagnetic heating device to perform the heating work. It should be noted that when any one of the relays has a sticking fault or an attraction fault, the relay fault detection process can be directly exited and an alarm is given.

[0052] Therefore, before the electromagnetic heating device is heated, the relays are detected for the sticking fault and the attraction fault, and the heating is allowed when there is no sticking fault and attraction fault, and the heating is prohibited when there is a sticking fault or an attraction fault, so as to improve the safety of the electromagnetic heating device.

[0053] ​In summary, according to the relay fault detection method of the electromagnetic heating device in the embodiment of the present application, by controlling multiple relays to be all disconnected, and outputting a heating control signal to the half-bridge power module, so that the half-bridge power module drives the resonant heating module in the power-on state to perform resonant operation, and simultaneously acquiring the output current of the half-bridge power module, and then detecting the sticking fault of the multiple relays according to the output current of the half-bridge power module, when it is determined that the multiple relays have no sticking fault, controlling each relay to be attracted in turn, and outputting a heating control signal to the half-bridge power module, so that the half-bridge power module drives the resonant heating module in the power-on state to perform resonant operation, and simultaneously acquiring the output current of the half-bridge power module, and then detecting the attraction fault of each relay according to the output current of the half-bridge power module. Therefore, the sticking and attraction faults of the relays before the electromagnetic heating device is heated can be detected, which provides a strong guarantee for whether the safe heating can continue, thereby effectively improving the safety of the electromagnetic heating device, and helping to prevent safety accidents caused thereby.

[0054] In one embodiment, a computer readable storage medium is provided, and the electromagnetic heating device relay fault detection program is stored on the computer readable storage medium, and the electromagnetic heating device relay fault detection program is executed by a processor to implement the above-mentioned electromagnetic heating device relay fault detection method.

[0055] For the purpose of this specification, a "computer-readable medium" can be any apparatus 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 include the following: an electrical connection having one or more wires (electrical apparatus), a portable computer diskette (magnetic apparatus), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber apparatus, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium can even be paper or another suitable medium on which the program can be printed, because the program can be electronically obtained, for example, by optical scanning of the paper or other medium, followed by electronic conversion into a form that can be further processed by a computer, and then stored in a computer memory.

[0056] According to the computer readable storage medium in the embodiment of the present application, since the electromagnetic heating device relay fault detection program is stored on the storage medium, and the program is executed by a processor to implement the above-mentioned electromagnetic heating device relay fault detection method. Therefore, the sticking and attraction faults of the relays before the electromagnetic heating device is heated can be detected, which provides a strong guarantee for whether the safe heating can continue, thereby effectively improving the safety of the electromagnetic heating device, and helping to prevent safety accidents caused thereby.

[0057] Figure 4 Fig. 1 is a schematic diagram of an electromagnetic heating device according to an embodiment of the present application. As shown in Fig. 1, the electromagnetic heating device 200 comprises a memory 201, a processor 202, and a relay fault detection program of the electromagnetic heating device stored in the memory 201 and executable in the processor 202. When the processor 202 executes the relay fault detection program, the above-mentioned relay fault detection method of the electromagnetic heating device is implemented. Figure 4

[0058] The electromagnetic heating device according to the embodiment of the present application, due to comprising the memory, the processor, and the relay fault detection program of the electromagnetic heating device stored in the memory and executable in the processor, can implement the above-mentioned relay fault detection method of the electromagnetic heating device by executing the relay fault detection program in the processor. Thus, the adhesion and attraction faults of the relay before the electromagnetic heating device is heated can be detected, which provides strong guarantee for whether the electromagnetic heating device can continue to be safely heated, thereby effectively improving the safety of the electromagnetic heating device and helping to prevent safety accidents caused thereby.

[0059] Figure 5 Fig. 2 is a schematic diagram of a relay fault detection device of an electromagnetic heating device according to an embodiment of the present application. As shown in Fig. 2, the electromagnetic heating device comprises a plurality of resonant heating modules 110, a plurality of relays 120, and a half-bridge power supply module 130. Each of the plurality of relays 120 corresponds to control whether one of the resonant heating modules 110 is powered on, and the half-bridge power supply module 130 is used to provide a resonant power supply to each of the resonant heating modules 110. Figure 1 Figure 5

[0060] ​​​The control module 140 is configured to control the plurality of relays 120 to be all disconnected, and output a heating control signal to the half-bridge power supply module 130, so that the half-bridge power supply module 130 drives the resonant heating module 110 in the power-on state to perform resonant operation; the first fault detection module 141 is configured to acquire an output current of the half-bridge power supply module 130, and perform adhesion fault detection on the plurality of relays 120 according to the output current of the half-bridge power supply module 130; the control module 140 is further configured to control each relay 120 to be attracted in turn when the plurality of relays 120 have no adhesion fault, and output a heating control signal to the half-bridge power supply module 130, so that the half-bridge power supply module 130 drives the resonant heating module 110 in the power-on state to perform resonant operation; and the second fault detection module 142 is configured to acquire an output current of the half-bridge power supply module 130, and perform attraction fault detection on each relay 120 according to the output current of the half-bridge power supply module 130.

[0061] In one embodiment, when the first fault detection module 141 performs adhesion fault detection on the plurality of relays 120 according to the output current of the half-bridge power supply module 150, it is determined whether the output current of the half-bridge power supply module 150 is zero, wherein if the output current of the half-bridge power supply module 150 is zero, it is determined that the plurality of relays 120 have no adhesion fault; and if the output current of the half-bridge power supply module 150 is not zero, it is determined that there is a relay with adhesion fault in the plurality of relays 120.

[0062] In one embodiment, when the second fault detection module 142 performs attraction fault detection on each relay 120 according to the output current of the half-bridge power supply module 150, it is determined whether the output current of the half-bridge power supply module 150 is zero, wherein if the output current of the half-bridge power supply module 150 is zero, it is determined that the currently detected relay has attraction fault; and if the output current of the half-bridge power supply module 150 is not zero, it is determined that the currently detected relay has no attraction fault.

[0063] It should be noted that the description of the relay fault detection device of the electromagnetic heating equipment in the present application can refer to the description of the relay fault detection method of the electromagnetic heating equipment in the present application, which will not be repeated here.

[0064] The relay fault detection device of the electromagnetic heating equipment according to the embodiment of the present application controls the multiple relays to be all disconnected through the control module, and outputs a heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the power-on state to perform resonant work, and at the same time, the output current of the half-bridge power supply module is obtained through the first fault detection module, so that the multiple relays are subjected to adhesion fault detection according to the output current of the half-bridge power supply module. When the multiple relays are all free from adhesion fault, the control module controls each relay to be attracted in turn, and outputs a heating control signal to the half-bridge power supply module, so that the half-bridge power supply module drives the resonant heating module in the power-on state to perform resonant work, and at the same time, the output current of the half-bridge power supply module is obtained through the second fault detection module, and each relay is subjected to attraction fault detection according to the output current of the half-bridge power supply module. In this way, the adhesion and attraction faults of the relays before the electromagnetic heating equipment is heated can be detected, which provides a strong guarantee for whether the heating can continue safely, thereby effectively improving the safety of the electromagnetic heating equipment and helping to prevent safety accidents caused thereby.

[0065] In one embodiment of the present application, a heating control system of an electromagnetic heating equipment is provided, as shown in Figure 1 The heating control system 100 of the electromagnetic heating equipment includes multiple resonant heating modules 110, multiple relays 120, a half-bridge power supply module 130, a control module 140 and a current detection module 150.

[0066] Each relay 120 of the multiple relays 120 corresponds to control whether one resonant heating module 110 is powered on; the half-bridge power supply module 130 is used to provide resonant power to each resonant heating module 110; the control module 140 is used to output a disconnect control signal to each relay 120 to control the multiple relays 120 to be all disconnected, and output a heating control signal to the half-bridge power supply module 130 to drive the resonant heating module 110 in the power-on state to perform resonant work through the half-bridge power supply module 130; the current detection module 150 is used to detect the output current of the half-bridge power supply module 130; the control module 140 is further used to perform adhesion fault detection on the multiple relays 120 according to the output current of the half-bridge power supply module 130 to determine when the multiple relays 120 are all free from adhesion fault, control each relay 120 to be attracted in turn, and output a heating control signal to the half-bridge power supply module 130 to drive the resonant heating module 110 in the power-on state to perform resonant work, and perform attraction fault detection on each relay 120 according to the output current of the half-bridge power supply module 130.

[0067] In one embodiment, when the control module 140 performs the sticking fault detection on the plurality of relays 120 according to the output current of the half-bridge power module 150, the control module 140 determines whether the output current of the half-bridge power module 150 is zero. If the output current of the half-bridge power module 150 is zero, it is determined that none of the plurality of relays 120 has the sticking fault. If the output current of the half-bridge power module 150 is not zero, it is determined that there is a relay with the sticking fault in the plurality of relays 120.

[0068] In one embodiment, when the control module 140 performs the pull-in fault detection on each relay 120 according to the output current of the half-bridge power module 150, the control module 140 determines whether the output current of the half-bridge power module 150 is zero. If the output current of the half-bridge power module 150 is zero, it is determined that the currently pulled-in relay 120 has the pull-in fault. If the output current of the half-bridge power module 150 is not zero, it is determined that the currently pulled-in relay 120 does not have the pull-in fault.

[0069] In one embodiment, when the control module 140 controls each relay to be pulled in in turn, the control module 140 controls the current relay in the plurality of relays 120 to be pulled in and controls the other relays in the plurality of relays 120 to be all turned off.

[0070] It should be noted that the description of the heating control system of the electromagnetic heating device in the present application can refer to the description of the relay fault detection method of the electromagnetic heating device in the present application, which will not be repeated here.

[0071] According to the heating control system of the electromagnetic heating device, the control module outputs the turn-off control signal to each relay to control the plurality of relays to be all turned off, and outputs the heating control signal to the half-bridge power module to enable the half-bridge power module to drive the resonant heating module in the power-on state to perform the resonant operation. Meanwhile, the current detection module detects the output current of the half-bridge power module, and the control module performs the sticking fault detection on the plurality of relays according to the output current of the half-bridge power module to determine whether the plurality of relays all have the sticking fault. When it is determined that the plurality of relays all do not have the sticking fault, the control module controls each relay to be pulled in in turn, and outputs the heating control signal to the half-bridge power module to enable the half-bridge power module to drive the resonant heating module in the power-on state to perform the resonant operation, and performs the pull-in fault detection on each relay according to the output current of the half-bridge power module. Thus, the sticking and pull-in faults of the relays can be detected before the electromagnetic heating device is heated, which provides a strong guarantee for whether the electromagnetic heating device can continue to be safely heated, thereby effectively improving the safety of the electromagnetic heating device and helping to prevent safety accidents caused by the electromagnetic heating device.

[0072] It is to be appreciated that the logical and / or steps represented in the flow diagrams, or otherwise described herein, can be considered as a sequence of executable instructions, for implementing logical functions, and can be embodied in any computer-readable medium for use by 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, or in conjunction with the execution of the instructions.

[0073] It should be understood that portions of the application can be implemented in hardware, software, firmware, or combinations thereof. In the above embodiments, the various steps or methods can be implemented, in part, or in whole, using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, and in another embodiment, the hardware can include any or a combination of the following: discrete logic circuits having logic gates for implementing logic functions upon an application of data signals, application specific integrated circuits having logic gates, programmable gate arrays (PGA), field programmable gate arrays (FPGA), and / or the like.

[0074] In the description of the present application, the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like, are intended to 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 present application. The appearances of the above terms in various places in the specification are not necessarily intended to refer to the same embodiment or example. Furthermore, the described particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0075] In addition, the terms "first", "second", and the like, are used merely as a label to aid describing the exemplary embodiments and are not intended to signify relative importance or a 5 preferred or particular embodiment. Thus, a feature defined with one of these terms can include more than one of the features. The term "plurality" means at least two, for example, two, three, etc., unless expressly specified otherwise.

[0076] In the present application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixed", and the like, should be given their broadest possible interpretation in accordance with the principle that the present application can be implemented in any way possible. They can mean fixed connection, detachable connection, or integral; they can mean mechanical connection, or electrical connection; they can mean direct connection, or indirect connection via an intermediate medium; they can mean internal connection of two elements, or interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0077] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and that variations, modifications, substitutions and changes can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. A method of detecting a relay fault of an electromagnetic heating apparatus, characterized by, The electromagnetic heating device includes a plurality of resonant heating modules, a plurality of relays, and a half-bridge power supply module, each of the plurality of relays corresponds to control whether a resonant heating module is powered on, and the half-bridge power supply module is used to provide a resonant power supply to each resonant heating module, each resonant heating module includes a coil disc L and a resonant capacitor C, wherein the relay fault detection method comprises the following steps: The heating permission flag bit is cleared to prohibit the electromagnetic heating device from performing heating work; Control the plurality of relays to be disconnected, and output a heating control signal to the half-bridge power supply module, the heating control signal is a PWM signal, so that two switching tubes Q1 and Q2 in the half-bridge power supply module are alternately turned on, so that the resonant heating module in the powered-on state is driven to perform resonant work through the half-bridge power supply module; Obtain the output current of the half-bridge power supply module, and perform adhesion fault detection on the plurality of relays according to the output current of the half-bridge power supply module, judge whether the output current of the half-bridge power supply module is zero, if the output current of the half-bridge power supply module is zero, it is determined that the plurality of relays have no adhesion fault, if the output current of the half-bridge power supply module is not zero, it is determined that there is a relaying fault in the plurality of relays; When it is determined that the plurality of relays have no adhesion fault, control the current relay in the plurality of relays to be attracted, control the other relays in the plurality of relays to be disconnected, and output the heating control signal to the half-bridge power supply module, so that the resonant heating module in the powered-on state is driven to perform resonant work through the half-bridge power supply module; Obtain the output current of the half-bridge power supply module, and perform adhesion fault detection on the plurality of relays according to the output current of the half-bridge power supply module, judge whether the output current of the half-bridge power supply module is zero, if the output current of the half-bridge power supply module is zero, it is determined that the plurality of relays have no adhesion fault, if the output current of the half-bridge power supply module is not zero, it is determined that there is a relaying fault in the plurality of relays; After confirming that the plurality of relays of the electromagnetic heating device have no adhesion fault and no adhesion fault, the heating permission flag bit is set to 1 to allow the electromagnetic heating device to perform heating work.

2. A computer-readable storage medium, characterized in that, The electromagnetic heating device's relay fault detection program is stored thereon, and when the processor executes the electromagnetic heating device's relay fault detection program, the electromagnetic heating device's relay fault detection method of claim 1 is realized.

3. An electromagnetic heating apparatus, characterized by, The electromagnetic heating device's relay fault detection program is stored thereon, and when the processor executes the electromagnetic heating device's relay fault detection program, the electromagnetic heating device's relay fault detection method of claim 1 is realized.

4. A relay failure detection device for an electromagnetic heating apparatus, characterized by comprising: The electromagnetic heating device comprises a plurality of resonant heating modules, a plurality of relays, and a half-bridge power supply module, each of the plurality of relays controls whether a resonant heating module is powered on or not, and the half-bridge power supply module is used to provide resonant power to each resonant heating module, each resonant heating module comprises a coil disc L and a resonant capacitor C, wherein the relay fault detection device comprises: a control module for controlling the plurality of relays to be disconnected, and outputting a heating control signal to the half-bridge power supply module, the heating control signal being a PWM signal, so that two switching tubes Q1 and Q2 in the half-bridge power supply module are alternately turned on, so that the resonant heating module in the powered-on state is driven to work in resonance by the half-bridge power supply module; a first fault detection module for acquiring the output current of the half-bridge power supply module, and performing adhesion fault detection on the plurality of relays according to the output current of the half-bridge power supply module, to determine whether the output current of the half-bridge power supply module is zero, if the output current of the half-bridge power supply module is zero, it is determined that the plurality of relays have no adhesion fault, and if the output current of the half-bridge power supply module is not zero, it is determined that there is an adhesion fault in the plurality of relays; the control module is also used to control the current relay to be attracted when the plurality of relays have no adhesion fault, control the other relays to be disconnected, and output the heating control signal to the half-bridge power supply module, so that the resonant heating module in the powered-on state is driven to work in resonance by the half-bridge power supply module; the control module is also used to control the heating permission flag bit to be cleared before controlling the plurality of relays to be disconnected, to prohibit the electromagnetic heating device from performing heating work, and after confirming that the plurality of relays of the electromagnetic heating device have no adhesion fault and no attraction fault, the heating permission flag bit is set to 1 to allow the electromagnetic heating device to perform heating work; a second fault detection module for acquiring the output current of the half-bridge power supply module, and performing attraction fault detection on each relay according to the output current of the half-bridge power supply module, to determine whether the output current of the half-bridge power supply module is zero, if the output current of the half-bridge power supply module is not zero, it is determined that the current attracted relay has no attraction fault, and if the output current of the half-bridge power supply module is zero, it is determined that the current attracted relay has an attraction fault.

5. A heating control system for an electromagnetic heating apparatus, characterized by, comprises: a plurality of resonant heating modules, each resonant heating module comprising a coil disc L and a resonant capacitor C; a plurality of relays, each of the plurality of relays controls whether a resonant heating module is powered on or not; a half-bridge power supply module, the half-bridge power supply module is used to provide resonant power to each resonant heating module; The control module is configured to output a disconnection control signal to each relay to control the plurality of relays to be disconnected, and output a heating control signal to the half-bridge power supply module, the heating control signal being a PWM signal, so that two switch tubes Q1 and Q2 in the half-bridge power supply module are alternately turned on to drive the resonant heating module in the powered state to perform resonant operation through the half-bridge power supply module. The current detection module is configured to detect an output current of the half-bridge power supply module. The control module is further configured to, when the plurality of relays are determined to have no sticking fault according to the output current of the half-bridge power supply module, control a current relay in the plurality of relays to be attracted and control the other relays in the plurality of relays to be disconnected, output the heating control signal to the half-bridge power supply module to drive the resonant heating module in the powered state to perform resonant operation through the half-bridge power supply module, and detect an attraction fault of each relay according to the output current of the half-bridge power supply module. The control module is further configured to, before the plurality of relays are controlled to be disconnected, control a heating permission flag bit to be cleared to prohibit the electromagnetic heating device from performing heating operation, and after it is confirmed that the plurality of relays of the electromagnetic heating device have no sticking fault and attraction fault, set the heating permission flag bit to 1 to allow the electromagnetic heating device to perform heating operation. When the control module detects the sticking fault of the plurality of relays according to the output current of the half-bridge power supply module, the control module is configured to determine whether the output current of the half-bridge power supply module is zero, wherein if the output current of the half-bridge power supply module is zero, it is determined that the plurality of relays have no sticking fault, and if the output current of the half-bridge power supply module is not zero, it is determined that there is a relay with a sticking fault in the plurality of relays. When the control module detects the attraction fault of each relay according to the output current of the half-bridge power supply module, the control module is configured to determine whether the output current of the half-bridge power supply module is zero, wherein if the output current of the half-bridge power supply module is not zero, it is determined that the current attracted relay has no attraction fault, and if the output current of the half-bridge power supply module is zero, it is determined that the current attracted relay has an attraction fault.

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