CN114080072A - Relay state detection method, device and equipment for electromagnetic heating appliance - Google Patents
Relay state detection method, device and equipment for electromagnetic heating appliance Download PDFInfo
- Publication number
- CN114080072A CN114080072A CN202010783568.0A CN202010783568A CN114080072A CN 114080072 A CN114080072 A CN 114080072A CN 202010783568 A CN202010783568 A CN 202010783568A CN 114080072 A CN114080072 A CN 114080072A
- Authority
- CN
- China
- Prior art keywords
- power
- heating
- relay
- heating power
- electromagnetic heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 416
- 238000001514 detection method Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 claims abstract description 59
- 230000001960 triggered effect Effects 0.000 claims abstract description 17
- 239000003990 capacitor Substances 0.000 claims description 26
- 239000000126 substance Substances 0.000 claims 1
- 230000006698 induction Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000007599 discharging Methods 0.000 description 4
- 238000010411 cooking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/26—Testing of individual semiconductor devices
- G01R31/2607—Circuits therefor
- G01R31/2621—Circuits therefor for testing field effect transistors, i.e. FET's
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
The application provides a relay state detection method, a device and equipment of an electromagnetic heating appliance, wherein the method comprises the following steps: after a setting instruction triggered by a user is received, judging whether the current first heating power of the electromagnetic heating appliance is greater than or equal to the preset power or not, wherein the setting instruction comprises a second heating power; if the first heating power is greater than or equal to the preset power, judging whether the second heating power is less than the preset power; and if the second heating power is smaller than the preset power, determining the state of the relay according to a first control signal. The method can determine the contact state of the relay when the electromagnetic heating appliance is switched from the larger heating power to the smaller heating power.
Description
Technical Field
The embodiment of the application relates to the technical field of household appliances, in particular to a method, a device and equipment for detecting the state of a relay of an electromagnetic heating appliance.
Background
The induction cooker is a common electromagnetic heating appliance, and in order to meet different requirements of users, the induction cooker can be heated according to different heating powers according to the setting of the users. For example, a user can set a larger heating power when stir-frying; during stewing, a smaller heating power can be set. In real life, various cooking modes can be used when a dish is cooked, for example, some dishes can be cooked quickly and need to be stewed for a while with water, and correspondingly, the induction cooker also needs to be switched from a larger heating power to a smaller heating power.
The existing induction cooker usually uses a single Insulated Gate Bipolar Transistor (IGBT) parallel resonant circuit to implement heating, and the capacity of a resonant capacitor in the resonant circuit is increased or decreased through relay control to complete switching of high-power heating or low-power heating.
However, when the induction cooker is heated with high power for a long time, the relay contact may be stuck and cannot be disconnected, so that the induction cooker cannot normally work when being switched to low-power heating.
Disclosure of Invention
The application provides a relay state detection method, a relay state detection device and relay state detection equipment for an electromagnetic heating appliance, which can determine the relay contact state when the electromagnetic heating appliance is switched from large heating power to small heating power.
In a first aspect, the application provides a relay state detection method for an electromagnetic heating appliance, which is applied to the electromagnetic heating appliance, the electromagnetic heating appliance includes a resonant circuit, a driving circuit and a control circuit, the resonant circuit includes a relay, a resonant capacitor and an insulated gate bipolar transistor IGBT module, the relay is used for controlling a capacitance value of the resonant capacitor, the control circuit is used for sending a first control signal to the driving circuit to control the IGBT module to be turned on or off through the driving circuit, and the method includes: after a setting instruction triggered by a user is received, judging whether the current first heating power of the electromagnetic heating appliance is greater than or equal to the preset power or not, wherein the setting instruction comprises a second heating power; if the first heating power is greater than or equal to the preset power, judging whether the second heating power is less than the preset power; the control circuit is used for sending a first control signal to the driving circuit so as to control the IGBT module to be switched on or switched off through the driving circuit; and if the second heating power is smaller than the preset power, determining the state of the relay according to the first control signal.
Optionally, if the second heating power is smaller than the preset power, determining the state of the relay according to the first control signal, including: if the second heating power is smaller than the preset power, the current heating power is switched to a third heating power, and then the duty ratio corresponding to the first control signal is saved; controlling the electromagnetic heating appliance to stop heating, and determining fourth heating power when the electromagnetic heating appliance is controlled to heat through the duty ratio corresponding to the first control signal after the second control signal is sent to the relay, wherein the second control signal is used for indicating the relay to be disconnected; the state of the relay is determined according to the fourth heating power.
The method determines the state of the contact of the relay by comparing the heating power of the electromagnetic heating appliance under the control of the same first control signal, not only solves the problem that the state of the contact of the relay cannot be determined, but also has the advantages of simplicity, small calculation amount and high efficiency of determining the state of the relay.
Optionally, determining the state of the relay according to the fourth heating power includes: determining a difference between the fourth heating power and the third heating power; if the difference value is larger than the preset value, determining that the relay is in a contact disconnection state; and if the difference value is not greater than the preset value, determining that the relay is in a contact adhesion state.
According to the method, the state of the relay contact can be determined by comparing the difference value between the fourth heating power and the third heating power with the preset value, the method is simple, and the determining efficiency is high.
Optionally, the preset value ranges from 80W to 150W.
By the method, different preset values can be set according to the actual models of the electromagnetic heating appliances, and the accuracy of determining the state of the relay is improved for different electromagnetic heating appliances.
Optionally, the third heating power is a preset power.
The method can simplify the data processing process of the electromagnetic heating appliance, reduce the data complexity and improve the processing efficiency.
Optionally, the third heating power has a value range of 800W to 1400W.
By the method, different third heating rates can be set according to the actual model of the electromagnetic heating appliance, and the normal work of the electromagnetic heating appliance is guaranteed.
Optionally, the value range of the preset power is 1000W-1300W.
By the method, different preset powers can be set according to actual models of electromagnetic heating appliances, and different high-power intervals and small-power intervals are defined for the electromagnetic heating appliances of different models.
Optionally, the preset power is 1200W.
The preset power can meet the use requirement of common electromagnetic heating appliances.
Optionally, after determining that the relay is in the contact opening state, the method further includes: and continuously controlling the electromagnetic heating appliance to heat by adopting a second heating power.
By the method, after the relay contact is determined to be in the off state, the electromagnetic heating appliance can be continuously heated according to the second heating power input by the user, and the use requirement of the user is met.
Optionally, after determining that the relay is in the contact adhesion state, the method further includes: and intermittently controlling the electromagnetic heating appliance to heat by adopting a third heating power.
By the method, after the relay contact is determined to be in the adhesion state, the electromagnetic heating appliance can be heated intermittently according to the third heating power, so that the average heating power is consistent with the second heating power input by a user, the safety of the electromagnetic heating appliance is guaranteed, and the use requirement of the user is met.
In a second aspect, the present application provides a relay state detection device of an electromagnetic heating appliance, the device includes a resonance circuit, a driving circuit and a control circuit that are connected in sequence, the resonance circuit includes a relay, a resonance capacitor and an insulated gate bipolar transistor IGBT module, the relay is used for controlling the capacitance value of the resonance capacitor, the control circuit is used for sending a first control signal to the driving circuit to control the IGBT module to turn on or turn off through the driving circuit, the control circuit is used for:
after a setting instruction triggered by a user is received, judging whether the current first heating power of the electromagnetic heating appliance is greater than or equal to the preset power or not, wherein the setting instruction comprises a second heating power;
if the first heating power is greater than or equal to the preset power, judging whether the second heating power is less than the preset power;
and if the second heating power is smaller than the preset power, determining the state of the relay according to the first control signal.
Optionally, the control circuit is specifically configured to, if the second heating power is less than the preset power, switch the current heating power to a third heating power, and then store a duty ratio corresponding to the first control signal; controlling the electromagnetic heating appliance to stop heating, and determining fourth heating power when the electromagnetic heating appliance is controlled to heat through the duty ratio corresponding to the first control signal after the second control signal is sent to the relay, wherein the second control signal is used for indicating the relay to be disconnected; the state of the relay is determined according to the fourth heating power.
Optionally, the control circuit is specifically configured to determine a difference between the fourth heating power and the third heating power; if the difference value is larger than the preset value, determining that the relay is in a contact disconnection state; and if the difference value is not greater than the preset value, determining that the relay is in a contact adhesion state.
Optionally, the third heating power is a preset power.
Optionally, the preset power is 1200W.
Optionally, the control circuit is further configured to continuously control the electromagnetic heating appliance to heat with a second heating power after determining that the relay is in the contact opening state.
Optionally, the control circuit is further configured to intermittently control the electromagnetic heating appliance to heat with a third heating power after determining that the relay is in the contact adhesion state.
In a third aspect, the present application provides an electromagnetic heating appliance comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of the first aspect or the alternatives of the first aspect.
In a fourth aspect, the present application provides a computer-readable storage medium having stored thereon computer-executable instructions for implementing the method as described in the first aspect or the alternatives thereof when executed by a processor.
According to the relay state detection method, the device and the equipment for the electromagnetic heating appliance, after a setting instruction triggered by a user is received, whether the current first heating power of the electromagnetic heating appliance is larger than or equal to the preset power or not is judged, if the first heating power is larger than or equal to the preset power, whether the second heating power is smaller than the preset power or not is judged, if the second heating power is smaller than the preset power, the electromagnetic heating appliance needs to be switched from a high-power heating mode to a low-power heating mode by the user, the state of a relay is further determined according to a first control signal, the problem that the contact state of the relay cannot be determined is solved, further, the electromagnetic heating appliance can select different heating modes according to the actual state of the relay, so that the heating requirement of the user is met, and the safety of the electromagnetic heating appliance can be guaranteed, and can meet the use requirements of users.
Drawings
Fig. 1 is a schematic system structure diagram of an electromagnetic heating appliance provided in the present application;
FIG. 2 is a schematic flow chart of a relay status detection method for an electromagnetic heating appliance provided in the present application;
FIG. 3 is a schematic interface diagram of an electromagnetic heating apparatus provided herein;
FIG. 4 is a schematic flow chart illustrating another method for detecting the relay status of the electromagnetic heating appliance provided in the present application;
fig. 5 is a schematic structural diagram of an electromagnetic heating appliance provided by the present application.
With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
An electromagnetic heating appliance, such as an induction cooker, is a common household appliance, and a user can cook dishes by selecting different cooking modes or setting different heating powers. The existing induction cooker usually uses a single IGBT parallel resonance mode to realize heating, wherein a resonance circuit comprises a relay and a plurality of resonance capacitors, and the switching of high-power heating or low-power heating is completed by increasing or decreasing the capacitance value of the resonance capacitors in the resonance circuit through the control of the relay. However, when the induction cooker is heated with high power for a long time, the relay contact has large current flowing, so that the contact generates heat, and the contact generates heat for a long time, so that the contact can be stuck. When a user needs to switch the electromagnetic heating appliance from a high-power heating mode to a low-power heating mode, the capacitance value of the resonant capacitor needs to be reduced by controlling the relay contact to be disconnected, but the relay contact is adhered and cannot be normally disconnected, so that the resonant capacitor cannot be reduced as expected when the electromagnetic heating appliance is switched to the low-power heating mode, and because the actual capacitance value in the resonant circuit cannot be judged by a control program, the actual state of the relay contact cannot be judged, the electromagnetic heating appliance is heated at low power under the condition of large resonant capacitor, and the IGBT is damaged due to overlarge heat. So that the electromagnetic heating appliance can not work normally when being switched from high power to low power heating. If can determine the actual state of relay contact when the electromagnetic heating utensil switches to less heating power from great heating power, then can confirm the electromagnetic heating utensil heating method according to the actual state of relay contact to guarantee that the electromagnetic heating utensil switches to normal work when the low-power heating, and then can satisfy user's user demand.
The electromagnetic heating appliance controls the charging and discharging of the resonant circuit through a first control signal sent by the control circuit of the electromagnetic heating appliance, and further controls the heating power of the electromagnetic heating appliance. Based on the fact that the charging and discharging conditions of the resonant circuit of the electromagnetic heating appliance are different and the heating power is different under the condition that the relay contact states in the resonant circuit are different when the first control signals sent by the electromagnetic heating appliance are the same, the inventor provides a relay state detection method of the electromagnetic heating appliance, wherein after a setting instruction triggered by a user is received, whether the current first heating power of the electromagnetic heating appliance is larger than or equal to the preset power is judged, and the setting instruction comprises the second heating power; if the first heating power is greater than or equal to the preset power, judging whether the second heating power is less than the preset power; the control circuit is used for sending a first control signal to the driving circuit so as to control the IGBT module to be switched on or switched off through the driving circuit; if the second heating power is smaller than the preset power, it is determined that the user needs to switch the heating power of the electromagnetic heating appliance from high power to low power, and then the state of the relay is determined according to the first control signal.
Fig. 1 is a schematic system structure diagram of an electromagnetic heating appliance provided in the present application, and as shown in fig. 1, the electromagnetic heating appliance includes a control circuit 11, a driving circuit 12, and a resonant circuit 13, which are connected in sequence.
The resonant circuit 13 includes an IGBT module 131, an LC resonant circuit 132, and a relay 133, and the relay control module may be a triode. Specifically, the capacitance value of the resonance capacitor in the resonance circuit can be controlled by controlling the closing and opening of the contacts of the relay. As shown in fig. 1, two parallel resonant capacitors can be connected by controlling the relay 133 to be closed, and the two parallel resonant capacitors are equivalent to a resonant capacitor with a large capacitance value, which is equivalent to increase the capacitance value of the resonant capacitor in the resonant circuit, so that the electromagnetic heating appliance can realize high-power heating; when the control relay 133 is turned off, the LC resonant circuit 132 only includes one capacitor, so that the capacitance value of the resonant capacitor in the resonant circuit can be reduced, and when the capacitance value of the resonant capacitor in the LC resonant circuit 132 is small, the resonant charging and discharging time is reduced, so that the turn-on step of the IGBT module 131 is lowered, and the electromagnetic heating appliance can realize low-power heating. It can be understood that the capacitance value of the resonant capacitor can also be controlled by setting a single-pole multi-throw relay, for example, each path of the single-pole multi-throw relay is connected with a capacitor with different capacitance values, and the size of the resonant capacitor in the resonant circuit is controlled by controlling the single-pole double-throw relay to conduct different paths, so that the electromagnetic heating appliance realizes high-power or low-power heating.
The control circuit 11 is configured to generate a PPG control signal, and control the IGBT module 131 in the resonant circuit 13 to turn on or off through the driving circuit 12, so as to control the inductance in the LC resonant circuit 132 to charge and discharge, thereby implementing the heating function of the electromagnetic heating appliance. The control circuit 11 is also used to generate a control signal to control the relay 133 in the resonant circuit 13 to open or close. The control circuit 11 is also arranged to derive a voltage across the LC tank. The control circuit 11 can execute the relay state detection method of the electromagnetic heating appliance provided by the present application.
The driving circuit 102 is configured to receive a control signal sent by the control circuit 11, and specifically, may be a Programmable Pulse Generator (PPG) control signal, and control the IGBT module 131 in the resonant circuit 13 to turn on or off according to the PPG control signal.
The heating control method provided by the present invention will be described below with reference to examples.
Fig. 2 is a schematic flow chart of a relay state detection method for an electromagnetic heating appliance provided by the present application, where an execution subject of the method may be the electromagnetic heating appliance shown in fig. 1, as shown in fig. 2, the method includes:
s201, after a setting instruction triggered by a user is received, whether the current first heating power of the electromagnetic heating appliance is larger than or equal to the preset power is judged.
Wherein the setting instruction comprises a second heating power.
The electromagnetic heating appliance receives a setting instruction triggered by a user, the setting instruction comprises second heating power, and the setting instruction triggered by the user can be received through a human-computer interaction interface of the electromagnetic heating device. Fig. 3 is a schematic interface diagram of the electromagnetic heating apparatus provided in the present application, and as shown in fig. 3, a user may trigger different setting instructions by selecting different cooking modes and input different heating powers; the user can also input different powers through keys to trigger different setting instructions. The electromagnetic heating appliance may also accept a setting instruction triggered by voice by a user through a voice device, for example, the user triggers the corresponding setting instruction by issuing "switch to stir fry" or "set heating power to 1200W".
S202, if the first heating power is larger than or equal to the preset power, whether the second heating power is smaller than the preset power is judged.
The preset power is a threshold value used for judging whether the heating mode of the electromagnetic heating appliance is high-power heating or low-power heating. Specifically, the preset power can be a numerical value set according to an actual circuit of the electromagnetic heating appliance, and the preset powers of the electromagnetic heating appliances of different types can be different, so that the use requirements of users can be met while the normal work of the electromagnetic heating appliances of different types is guaranteed. Optionally, the value range of the preset power is 1000W-1300W. By the method, different preset powers can be set according to actual models of electromagnetic heating appliances, and different high-power intervals and small-power intervals are defined for the electromagnetic heating appliances of different models. For example, the preset power of an induction cooker commonly used in homes may be set to 1200W.
S203, if the second heating power is smaller than the preset power, determining the state of the relay according to the first control signal.
Next, the operation states of the electromagnetic heating device in different cases will be described with reference to steps S201 to S203. After the electromagnetic heating appliance receives a second heating power setting instruction triggered by a user, if the current first heating power of the electromagnetic heating appliance is determined to be greater than or equal to the preset power through judgment and the second heating power is less than the preset power, determining that the user needs to switch the electromagnetic heating appliance from a high-power heating mode to a low-power switching mode; if the current first heating power of the electromagnetic heating appliance is determined to be larger than or equal to the preset power through judgment, and the second heating power is determined to be larger than or equal to the preset power, determining that the user needs to continuously heat the electromagnetic heating appliance at a larger heating power; if the current first heating power of the electromagnetic heating appliance is determined to be smaller than the preset power through judgment, and the second heating power is determined to be smaller than the preset power, determining that the user needs to continuously heat the electromagnetic heating appliance with smaller heating power; and if the current first heating power of the electromagnetic heating appliance is determined to be smaller than the preset power through judgment and the second heating power is greater than or equal to the preset power, determining that the user needs to switch the electromagnetic heating appliance from the low-power mode to the high-power mode.
For example, assuming that the preset power is 1200W, the current first heating power of the electromagnetic heating appliance is 1500W, and the second heating power included in the setting instruction triggered by the user and received by the electromagnetic heating appliance is 500W, in this case, the first heating power is greater than the preset power, and the second heating power is less than the preset power, it is known that the user needs to switch the electromagnetic heating appliance from the high-power heating mode to the low-power switching mode.
After the electromagnetic heating appliance receives a second heating power setting instruction triggered by a user, if the current first heating power of the electromagnetic heating appliance is determined to be greater than or equal to the preset power through judgment and the second heating power is less than the preset power, namely when the user needs to switch the electromagnetic heating appliance from a high-power heating mode to a low-power switching mode, the state of the relay can be determined according to the first control signal. When the first control signals sent by the electromagnetic heating appliance are the same, under the condition that the states of relay contacts in the resonant circuit are different, due to the fact that the capacitance values of resonant capacitors are different, the charging and discharging conditions of the resonant circuit of the electromagnetic heating appliance can be different, and further the heating power is different, if the second heating power is smaller than the preset power, the state of the relay is determined according to the first control signals, the electromagnetic heating appliance can be controlled to be switched on and off by the first control signals with the same duty ratio before and after the relay contacts are controlled to be switched off, and the actual state of the relay is determined according to the change of the heating power before and after the relay contacts are controlled to be switched off.
Optionally, after determining that the relay is in the contact opening state, the method may further include:
and continuously controlling the electromagnetic heating appliance to heat by adopting a second heating power.
By the method, after the relay contact is determined to be in the off state, the electromagnetic heating appliance can be continuously heated according to the second heating power input by the user, and the use requirement of the user is met.
Optionally, after determining that the relay is in the contact adhesion state, the method may further include:
and intermittently controlling the electromagnetic heating appliance to heat by adopting a third heating power.
By the method, after the relay contact is determined to be in the adhesion state, the electromagnetic heating appliance can be heated intermittently according to the third heating power, so that the average heating power is consistent with the second heating power input by a user, the safety of the electromagnetic heating appliance is guaranteed, and the use requirement of the user is met.
According to the relay state detection method of the electromagnetic heating appliance, after the setting instruction triggered by the user is received, judging whether the current first heating power of the electromagnetic heating appliance is greater than or equal to the preset power or not, if the first heating power is greater than or equal to the preset power, judging whether the second heating power is less than the preset power, if the second heating power is less than the preset power, it is determined that the user needs to switch the electromagnetic heating appliance from the high power heating mode to the low power heating mode, further, the state of the relay is determined according to the first control signal, the difficult problem that the contact state of the relay cannot be determined is solved, further, the electromagnetic heating appliance can select different heating modes according to the actual state of the relay, the heating requirement of a user is met, the safety of the electromagnetic heating appliance can be guaranteed, and the use requirement of the user can be met.
Fig. 4 is another schematic flow chart of a relay state detection method for an electromagnetic heating appliance provided in the present application, and the embodiment shown in fig. 4 is further described on the basis of the embodiment shown in fig. 2, as to how to determine the relay contact state according to the heating power of the electromagnetic heating appliance before and after the relay contact is controlled to be opened, as shown in fig. 4, the method includes:
s401, after a setting instruction triggered by a user is received, whether the current first heating power of the electromagnetic heating appliance is larger than or equal to the preset power is judged.
Wherein the setting instruction comprises a second heating power.
S402, if the first heating power is larger than or equal to the preset power, whether the second heating power is smaller than the preset power is judged.
S401 and S402 have the same technical features as S201 and S202, and specific descriptions may refer to S201 and S202, which are not described herein.
And S403, if the second heating power is smaller than the preset power, switching the current heating power to a third heating power, and then storing the duty ratio corresponding to the first control signal.
Specifically, if the electromagnetic heating appliance determines that the second heating power is smaller than the preset power, the heating power is switched to the third heating power through the control circuit, and the duty ratio corresponding to the first control signal output by the control circuit is saved. The third heating power may be a value set according to an actual circuit of the electromagnetic heating appliance, the third heating powers of different types of electromagnetic heating appliances may be different, and optionally, the value range of the third heating power is 800W to 1400W. By the method, different third heating rates can be set according to the actual model of the electromagnetic heating appliance, and the normal work of the electromagnetic heating appliance is guaranteed. For example, the third heating power may be 1000W. The third heating power may be the same as or different from the preset power.
For example, if the third heating power is 1000W and the current heating power of the electromagnetic heating appliance is 1500W, the electromagnetic heating appliance controls the heating power to be switched from 1500W to 1000W through the control circuit, and stores the duty ratio corresponding to the first control signal output by the control circuit when the electromagnetic heating appliance operates at 1000W.
And S404, controlling the electromagnetic heating appliance to stop heating, and determining fourth heating power when the electromagnetic heating appliance is controlled to heat through the duty ratio corresponding to the first control signal after the second control signal is sent to the relay.
Wherein the second control signal is used for indicating that the relay is disconnected.
Specifically, the electromagnetic heating appliance stops heating through the control circuit controller, after a period of preset time, the control circuit sends a second control signal to the relay in the resonance circuit to indicate the disconnection of the relay contact, then the control circuit outputs a first control signal according to a pre-stored duty ratio, the electromagnetic heating appliance is controlled to heat, and fourth heating power, namely actual heating power, is stored when the electromagnetic heating appliance heats. This is illustrated below with reference to fig. 1. The electromagnetic heating appliance outputs a control signal through the control circuit and controls the IGBT module in the resonance circuit to be disconnected through the driving circuit so as to stop heating, then after a period of time, the relay contact in the resonance circuit is controlled to be disconnected through the control circuit, then the first control signal is output through the control circuit according to the pre-stored duty ratio, the duration corresponding to the pre-stored duty ratio is controlled through the IGBT module in the resonance circuit through the driving circuit, the electromagnetic heating appliance is periodically switched on and off so as to heat the electromagnetic heating appliance, and the actual heating power when the electromagnetic heating appliance is heated is stored, namely the fourth heating power.
And S405, determining the state of the relay according to the fourth heating power.
When resonant capacitance is different, when the electromagnetic heating utensil heats through the first control signal controller of the same duty cycle, heating power can have the difference, and back before third heating power and fourth heating power are the disconnection of instruction relay contact respectively, and the electromagnetic heating utensil is through the power that corresponds when the first control signal controller of the same duty cycle heats, can determine the state of relay according to third heating power and fourth heating power.
Specifically, in one possible implementation, the determining the state of the relay according to the fourth heating power includes: determining a difference between the fourth heating power and the third heating power; if the difference value is larger than the preset value, determining that the relay is in a contact disconnection state; and if the difference value is not greater than the preset value, determining that the relay is in a contact adhesion state.
The preset value may be a value set according to an actual circuit of the electromagnetic heating device, and the third heating powers of different types of electromagnetic heating devices may be different. Since there is some fluctuation in the heating power of the electromagnetic heating appliance during the actual use, the third heating power or the fourth heating power is not always maintained. For example, when the theoretical electromagnetic heating power is applied at 1000W, the actual heating power may be different at different heating times, and the heating power may be between 1050W-950W. The preset value may be set slightly larger in consideration of the presence of such fluctuation. Optionally, the preset value ranges from 80W to 150W. By the method, different preset values can be set according to the actual models of the electromagnetic heating appliances, and the accuracy of determining the state of the relay is improved for different electromagnetic heating appliances. The preset value may be 100W, for example.
For example, if the preset value is 100W, the fourth heating power is 1200W, and the third heating power is 1000W, the difference between the fourth heating power and the third heating power is 200W, and is greater than the preset value of 100W, it may be determined that the relay is in the contact open state.
According to the method, the state of the relay contact can be determined by comparing the difference value between the fourth heating power and the third heating power with the preset value, the method is simple, and the determining efficiency is high.
In the relay state detection method for the electromagnetic heating appliance, in the contact of the above embodiment, after the current heating power is further switched to the third heating power, the duty ratio corresponding to the first control signal is saved, the electromagnetic heating appliance is controlled to stop heating, after the second control signal is sent to the relay, the fourth heating power when the electromagnetic heating appliance is controlled to heat through the duty ratio corresponding to the first control signal is determined, and the state of the relay is determined according to the fourth heating power, that is, when a user needs to switch the electromagnetic heating appliance from the high-power heating mode to the low-power heating mode, the state of the contact of the relay is determined by comparing the heating powers of the electromagnetic heating appliance under the same first control signal, so that the problem that the state of the contact of the relay cannot be determined is solved, the method is simple, and the calculation amount is small, the efficiency of determining the state of the relay is high.
The application provides a relay state detection device of electromagnetic heating utensil, the device is including the resonant circuit, drive circuit and the control circuit that connect gradually, including relay, resonance electric capacity and insulated gate bipolar transistor IGBT module in the resonant circuit, the relay is used for controlling resonance electric capacity's appearance value, control circuit is used for sending first control signal to drive circuit to switch on or turn-off through drive circuit control IGBT module, control circuit is used for:
after a setting instruction triggered by a user is received, whether the current first heating power of the electromagnetic heating appliance is larger than or equal to the preset power or not is judged, and the setting instruction comprises a second heating power.
And if the first heating power is greater than or equal to the preset power, judging whether the second heating power is less than the preset power.
And if the second heating power is less than the preset power, determining the state of the relay according to a first control signal, wherein the first control signal is a signal sent to the driving circuit by the control circuit and is used for controlling the IGBT module to be switched on or switched off through the driving circuit.
Optionally, the control circuit is specifically configured to, if the second heating power is less than the preset power, switch the current heating power to a third heating power, and then store a duty ratio corresponding to the first control signal; controlling the electromagnetic heating appliance to stop heating, and determining fourth heating power when the electromagnetic heating appliance is controlled to heat through the duty ratio corresponding to the first control signal after the second control signal is sent to the relay, wherein the second control signal is used for indicating the relay to be disconnected; the state of the relay is determined according to the fourth heating power.
Optionally, the control circuit is specifically configured to determine a difference between the fourth heating power and the third heating power; if the difference value is larger than the preset value, determining that the relay is in a contact disconnection state; and if the difference value is not greater than the preset value, determining that the relay is in a contact adhesion state.
The preset value ranges from 80W to 150W.
By the method, different preset values can be set according to the actual models of the electromagnetic heating appliances, and the accuracy of determining the state of the relay is improved for different electromagnetic heating appliances.
Optionally, the third heating power is a preset power.
The method can simplify the data processing process of the electromagnetic heating appliance, reduce the data complexity and improve the processing efficiency.
Optionally, the third heating power has a value range of 800W to 1400W.
By the method, different third heating rates can be set according to the actual model of the electromagnetic heating appliance, and the normal work of the electromagnetic heating appliance is guaranteed.
Optionally, the value range of the preset power is 1000W-1300W.
By the method, different preset powers can be set according to actual models of electromagnetic heating appliances, and different high-power intervals and small-power intervals are defined for the electromagnetic heating appliances of different models.
Optionally, the preset power is 1200W.
Optionally, the control circuit is further configured to continuously control the electromagnetic heating appliance to heat with a second heating power after determining that the relay is in the contact opening state.
Optionally, the control circuit is further configured to intermittently control the electromagnetic heating appliance to heat with a third heating power after determining that the relay is in the contact adhesion state.
The relay state detection device of the electromagnetic heating appliance can execute the relay state detection method of the electromagnetic heating appliance, and the content and the effect of the method can be referred to the embodiment part of the method, which is not described again.
Fig. 5 is a schematic structural diagram of an electromagnetic heating apparatus provided in the present application, and as shown in fig. 5, the electronic device of the present embodiment includes: a processor 51, a memory 52; the processor 51 is communicatively connected to the memory 52. The memory 52 is used to store computer programs. The processor 51 is adapted to call a computer program stored in the memory 52 to implement the method in the above-described method embodiment.
Optionally, the electronic device further comprises: a transceiver 53 for enabling communication with other devices.
The electronic device can execute the relay state detection method of the electromagnetic heating appliance, and the content and effect thereof can be referred to the embodiment of the method, which is not described again.
The application also provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are executed by a processor to implement the fault information processing method.
The content and effect of the method for detecting the relay state of the electromagnetic heating appliance can be referred to in the embodiment of the method, and details are not repeated here.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims. It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.
Claims (11)
1. The relay state detection method of the electromagnetic heating appliance is characterized by being applied to the electromagnetic heating appliance, wherein the electromagnetic heating appliance comprises a resonance circuit, a driving circuit and a control circuit which are sequentially connected, the resonance circuit comprises a relay, a resonance capacitor and an Insulated Gate Bipolar Transistor (IGBT) module, the relay is used for controlling the capacitance value of the resonance capacitor, the control circuit is used for sending a first control signal to the driving circuit so as to control the IGBT module to be switched on or switched off through the driving circuit, and the method comprises the following steps:
after a setting instruction triggered by a user is received, judging whether the current first heating power of the electromagnetic heating appliance is greater than or equal to a preset power or not, wherein the setting instruction comprises a second heating power;
if the first heating power is greater than or equal to the preset power, judging whether the second heating power is smaller than the preset power;
and if the second heating power is smaller than the preset power, determining the state of the relay according to a first control signal.
2. The method of claim 1, wherein determining the state of the relay according to the first control signal if the second heating power is less than the predetermined power comprises:
if the second heating power is smaller than the preset power, the current heating power is switched to a third heating power, and then the duty ratio corresponding to the first control signal is saved;
controlling the electromagnetic heating appliance to stop heating, and after sending a second control signal to the relay, determining a fourth heating power when the electromagnetic heating appliance is controlled to heat through a duty ratio corresponding to the first control signal, wherein the second control signal is used for indicating the relay to be switched off;
determining a state of the relay according to the fourth heating power.
3. The method of claim 2, wherein the determining the state of the relay from the fourth heating power comprises:
determining a difference between the fourth heating power and the third heating power;
if the difference value is larger than a preset value, determining that the relay is in a contact disconnection state;
and if the difference value is not larger than the preset value, determining that the relay is in a contact adhesion state.
4. Method according to claim 2 or 3, characterized in that the third heating power is the preset power.
5. The method according to claim 2 or 3, wherein the third heating power has a value in the range of 800W-1400W.
6. The method according to any one of claims 1 to 3, wherein the preset power value ranges from 1000W to 1300W.
7. The method of claim 3, wherein after the determining that the relay is in the contact open state, the method further comprises:
and continuously controlling the electromagnetic heating appliance to heat by adopting the second heating power.
8. The method of claim 3, wherein after determining that the relay is in a contact stuck state, the method further comprises:
and intermittently controlling the electromagnetic heating appliance to heat by adopting the third heating power.
9. The utility model provides a relay state detection device of electromagnetic heating utensil, its characterized in that, the device is including resonance circuit, drive circuit and the control circuit who connects gradually, including relay, resonant capacitor and insulated gate bipolar transistor IGBT module in the resonance circuit, the relay is used for controlling resonant capacitor's appearance value, control circuit be used for to drive circuit sends first control signal, with through drive circuit control the IGBT module switches on or shuts off, control circuit is used for:
after a setting instruction triggered by a user is received, judging whether the current first heating power of the electromagnetic heating appliance is greater than or equal to a preset power or not, wherein the setting instruction comprises a second heating power;
if the first heating power is greater than or equal to the preset power, judging whether the second heating power is smaller than the preset power;
and if the second heating power is smaller than the preset power, determining the state of the relay according to a first control signal.
10. An electromagnetic heating appliance, comprising:
at least one processor; and
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the method of any one of claims 1 to 7.
11. A computer-readable storage medium having computer-executable instructions stored therein, which when executed by a processor, are configured to implement the method of any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783568.0A CN114080072B (en) | 2020-08-06 | 2020-08-06 | Relay state detection method, device and equipment of electromagnetic heating appliance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010783568.0A CN114080072B (en) | 2020-08-06 | 2020-08-06 | Relay state detection method, device and equipment of electromagnetic heating appliance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114080072A true CN114080072A (en) | 2022-02-22 |
| CN114080072B CN114080072B (en) | 2023-06-27 |
Family
ID=80279611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010783568.0A Active CN114080072B (en) | 2020-08-06 | 2020-08-06 | Relay state detection method, device and equipment of electromagnetic heating appliance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114080072B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106413160A (en) * | 2015-07-28 | 2017-02-15 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and control method and device of relays in electromagnetic heating system |
| CN106686786A (en) * | 2015-11-11 | 2017-05-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus and control method and control circuit thereof |
| CN106937423A (en) * | 2015-12-31 | 2017-07-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its laser heating control method |
| CN107544021A (en) * | 2017-07-17 | 2018-01-05 | 广东美的厨房电器制造有限公司 | Detection method, system and micro-wave oven, the computer equipment of relay adhesion situation |
| CN110007224A (en) * | 2019-04-25 | 2019-07-12 | 桑顿新能源科技有限公司 | Relay adhesion detection method, device and the equipment of power supply circuit |
-
2020
- 2020-08-06 CN CN202010783568.0A patent/CN114080072B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106413160A (en) * | 2015-07-28 | 2017-02-15 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating system and control method and device of relays in electromagnetic heating system |
| CN106686786A (en) * | 2015-11-11 | 2017-05-17 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heating apparatus and control method and control circuit thereof |
| CN106937423A (en) * | 2015-12-31 | 2017-07-07 | 佛山市顺德区美的电热电器制造有限公司 | Electromagnetic heater and its laser heating control method |
| CN107544021A (en) * | 2017-07-17 | 2018-01-05 | 广东美的厨房电器制造有限公司 | Detection method, system and micro-wave oven, the computer equipment of relay adhesion situation |
| CN110007224A (en) * | 2019-04-25 | 2019-07-12 | 桑顿新能源科技有限公司 | Relay adhesion detection method, device and the equipment of power supply circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114080072B (en) | 2023-06-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111206365A (en) | Control method for household appliances based on Internet of things | |
| US8144440B2 (en) | Electric appliance and heating cooking device | |
| US9480107B2 (en) | Electronic induction heating cooker and driving method thereof | |
| CN105527853A (en) | Control method and device of intelligent home appliance | |
| CN109559934A (en) | Relay drive circuit and air conditioner | |
| CN104284465A (en) | Intelligent control method of convection heating of multiple electromagnetic heating units and electromagnetic heating device | |
| CN103916997B (en) | Electromagnetic induction heater and control method thereof | |
| CN108024403A (en) | Electromagnetic heating system and its control method and device | |
| CN114062908B (en) | Relay state detection method, device and equipment of electromagnetic heating appliance | |
| CN107087321B (en) | Method for adjusting hard turn-on voltage of IGBT and induction cooker | |
| CN108024404A (en) | Electromagnetic heating system and its control method and device | |
| CN105485731A (en) | Microwave oven circuit and microwave oven | |
| KR20140088323A (en) | Induction heat cooking apparatus and method for controlling of output level the same | |
| CN114080072B (en) | Relay state detection method, device and equipment of electromagnetic heating appliance | |
| CN206176478U (en) | Electromagnetic oven | |
| CN206560262U (en) | A kind of electromagnetic cooking appliance | |
| CN204539512U (en) | Electromagnetic heater and the electromagnetic oven with it | |
| CN204539509U (en) | Cooking apparatus and the electromagnetic heater for cooking apparatus | |
| JPH1187042A (en) | Electromagnetic cooking device | |
| CN204520276U (en) | Cooking apparatus and the electric heater unit for cooking apparatus | |
| JP3966600B2 (en) | Electromagnetic cooker | |
| CN102654290B (en) | Multi-cooker induction cooker device and operation method thereof | |
| CN109618440A (en) | A kind of electromagnetic heating control circuit and control method | |
| CN113900394B (en) | Control method of drive control circuit, drive control circuit and cooking appliance | |
| CN109519979B (en) | Method for realizing electromagnetic oven fire output pause and electromagnetic oven |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |