CN109307562B - Electromagnetic heating system and thermistor detection method and device thereof - Google Patents
Electromagnetic heating system and thermistor detection method and device thereof Download PDFInfo
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- CN109307562B CN109307562B CN201710631978.1A CN201710631978A CN109307562B CN 109307562 B CN109307562 B CN 109307562B CN 201710631978 A CN201710631978 A CN 201710631978A CN 109307562 B CN109307562 B CN 109307562B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
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- G—PHYSICS
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- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2207/00—Application of thermometers in household appliances
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Abstract
The invention discloses an electromagnetic heating system and a method and a device for detecting a thermistor thereof, wherein the method comprises the following steps: when the electromagnetic heating system is powered on, recording a temperature value obtained through the thermistor and recording as a first temperature value; when the electromagnetic heating system is in a standby state, recording a temperature value obtained through the thermistor and recording as a second temperature value; in the heating process of the electromagnetic heating system, acquiring a maximum temperature value and a minimum temperature value of temperature values acquired by the thermistor within continuous preset second preset time at intervals of first preset time; and judging whether the thermistor is in a failure state or not according to the first temperature value and/or the second temperature value, the maximum temperature value and the minimum temperature value. The method judges whether the thermistor fails according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and standby, so that the accuracy and the reliability of judgment are greatly improved, and the safety of the system is further improved.
Description
Technical Field
The invention relates to the technical field of electromagnetic heating, in particular to a method for detecting a thermistor in an electromagnetic heating system, a non-transitory computer readable storage medium, a device for detecting the thermistor in the electromagnetic heating system and the electromagnetic heating system.
Background
In an electromagnetic oven, when software certification is carried out on a thermistor for testing the temperature of a panel, software protection related to thermistor failure is provided, specifically, the thermistor failure is changed into a resistor with a fixed resistance value, and a software program is required to detect the thermistor failure and execute corresponding protection actions, so that a product is free from dangerous conditions.
The software program currently made has defects for the design of the part, and the situation of misjudgment exists only by recording and processing the thermistor sampling in the working process, thereby influencing the safety of the induction cooker.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a method for detecting a thermistor in an electromagnetic heating system, wherein whether the thermistor fails or not is determined according to a static temperature value and a dynamic temperature value during heating when the system is powered on and in standby, so as to greatly improve accuracy and reliability of the determination, and further improve safety of the system.
A second object of the invention is to propose a non-transitory computer-readable storage medium.
The third purpose of the invention is to provide a detection device for the thermistor in the electromagnetic heating system.
A fourth object of the present invention is to provide an electromagnetic heating system.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a method for detecting a thermistor in an electromagnetic heating system, including the following steps: when the electromagnetic heating system is powered on, recording a temperature value obtained through the thermistor and recording as a first temperature value; when the electromagnetic heating system is in a standby state, recording a temperature value obtained through the thermistor and recording as a second temperature value; in the process of heating the electromagnetic heating system, acquiring a maximum temperature value and a minimum temperature value of temperature values acquired by the thermistor within continuous preset second preset time at intervals of first preset time; judging whether the thermistor is in a failure state or not according to the first temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the second temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value.
According to the detection method of the thermistor in the electromagnetic heating system, when the electromagnetic heating system is powered on, the temperature value obtained through the thermistor is recorded and recorded as a first temperature value, when the electromagnetic heating system is in a standby state, the temperature value obtained through the thermistor is recorded and recorded as a second temperature value, and in the heating process of the electromagnetic heating system, the maximum temperature value and the minimum temperature value in the temperature values obtained through the thermistor within the continuous preset second preset time are obtained every other first preset time. And then, judging whether the thermistor is in a failure state or not according to the first temperature value and/or the second temperature value, the maximum temperature value and the minimum temperature value. Therefore, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and in standby, so that the judgment accuracy and reliability are greatly improved, and the safety of the system is further improved.
In addition, the detection method for the thermistor in the electromagnetic heating system provided by the embodiment of the invention can also have the following additional technical characteristics:
according to an embodiment of the present invention, the determining whether the thermistor is in a failure state according to the first temperature value, the maximum temperature value, and the minimum temperature value includes: acquiring the maximum value and the minimum value of the first temperature value, the maximum temperature value and the minimum temperature value, and calculating the difference value between the maximum value and the minimum value; judging whether the difference value between the maximum value and the minimum value is smaller than a first preset value or not; and if the difference value between the maximum value and the minimum value is smaller than the first preset value, judging that the thermistor is in the failure state.
According to another embodiment of the present invention, the determining whether the thermistor is in a failure state according to the second temperature value, the maximum temperature value, and the minimum temperature value includes: acquiring the maximum value and the minimum value of the second temperature value, the maximum temperature value and the minimum temperature value, and calculating the difference value between the maximum value and the minimum value; judging whether the difference value between the maximum value and the minimum value is smaller than a second preset value or not; and if the difference value between the maximum value and the minimum value is smaller than the second preset value, judging that the thermistor is in the failure state.
According to another embodiment of the present invention, the determining whether the thermistor is in a failure state according to the first temperature value, the second temperature value, the maximum temperature value, and the minimum temperature value includes: acquiring the maximum value and the minimum value of the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value, and calculating the difference value between the maximum value and the minimum value; judging whether the difference value between the maximum value and the minimum value is smaller than a third preset value; and if the difference value between the maximum value and the minimum value is smaller than the third preset value, judging that the thermistor is in the failure state.
In order to achieve the above object, a second embodiment of the present invention provides a non-transitory computer-readable storage medium, wherein when executed by a processor, the program implements the method for detecting a thermistor in an electromagnetic heating system as described above.
According to the non-transitory computer readable storage medium of the embodiment of the invention, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and standby by executing the detection method of the thermistor in the electromagnetic heating system, so that the judgment accuracy and reliability are greatly improved, and the safety of the system is further improved.
In order to achieve the above object, a third embodiment of the present invention provides a device for detecting a thermistor in an electromagnetic heating system, including: the first recording module is used for recording a temperature value obtained by the thermistor when the electromagnetic heating system is powered on and recording the temperature value as a first temperature value; the second recording module is used for recording a temperature value obtained by the thermistor and recording the temperature value as a second temperature value when the electromagnetic heating system is in a standby state; the third recording module is used for acquiring the maximum temperature value and the minimum temperature value of the temperature values acquired by the thermistor within the continuous preset second preset time at intervals of the first preset time in the heating process of the electromagnetic heating system; and the judging module is used for judging whether the thermistor is in a failure state or not according to the first temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the second temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value.
According to the detection device of the thermistor in the electromagnetic heating system, the first recording module records the temperature value obtained by the thermistor when the electromagnetic heating system is powered on as the first temperature value, the second recording module records the temperature value obtained by the thermistor when the electromagnetic heating system is in the standby state as the second temperature value, and then the third recording module records the maximum temperature value and the minimum temperature value in the temperature values obtained by the thermistor in the second preset time which is continuously preset every first preset time in the heating process of the electromagnetic heating system. And finally, judging whether the thermistor is in a failure state or not by the judging module according to the first temperature value and/or the second temperature value, the maximum temperature value and the minimum temperature value. Therefore, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and in standby, so that the judgment accuracy and reliability are greatly improved, and the safety of the system is further improved.
In addition, the detection device for the thermistor in the electromagnetic heating system according to the embodiment of the invention may further have the following additional technical features:
according to an embodiment of the present invention, when the determining module determines whether the thermistor is in a failure state according to the first temperature value, the maximum temperature value, and the minimum temperature value, the determining module obtains a maximum value and a minimum value among the first temperature value, the maximum temperature value, and the minimum temperature value, and calculates a difference between the maximum value and the minimum value; the judgment module judges whether the difference value between the maximum value and the minimum value is smaller than a first preset value; and if the difference value between the maximum value and the minimum value is smaller than the first preset value, the judging module judges that the thermistor is in the failure state.
According to another embodiment of the present invention, the determining module determines whether the thermistor is in a failure state according to the second temperature value, the maximum temperature value and the minimum temperature value, wherein the determining module obtains a maximum value and a minimum value of the second temperature value, the maximum temperature value and the minimum temperature value, and calculates a difference between the maximum value and the minimum value; the judgment module judges whether the difference value between the maximum value and the minimum value is smaller than a second preset value; and if the difference value between the maximum value and the minimum value is smaller than the second preset value, the judging module judges that the thermistor is in the failure state.
According to another embodiment of the present invention, the determining module determines whether the thermistor is in a failure state according to the first temperature value, the second temperature value, the maximum temperature value, and the minimum temperature value, wherein the determining module obtains a maximum value and a minimum value of the first temperature value, the second temperature value, the maximum temperature value, and the minimum temperature value, and calculates a difference between the maximum value and the minimum value; the judgment module judges whether the difference value between the maximum value and the minimum value is smaller than a third preset value; and if the difference value between the maximum value and the minimum value is smaller than the third preset value, the judgment module judges that the thermistor is in the failure state.
In order to achieve the above object, a fourth aspect of the present invention provides an electromagnetic heating system, which includes the above detection device for a thermistor.
According to the electromagnetic heating system, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and standby through the detection device of the thermistor, so that the accuracy and the reliability of judgment are greatly improved, and the safety of the system is further improved.
Drawings
FIG. 1 is a flow chart of a method of detecting a thermistor in an electromagnetic heating system according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for detecting a thermistor in an induction cooker heating system according to an embodiment of the present invention;
FIG. 3 is a block schematic diagram of a thermistor detection device in an electromagnetic heating system in accordance with an embodiment of the present invention; and
fig. 4 is a block schematic diagram of an electromagnetic heating system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A method of detecting a thermistor in an electromagnetic heating system, a non-transitory computer-readable storage medium, a device for detecting a thermistor in an electromagnetic heating system, and an electromagnetic heating system according to embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a flowchart of a method of detecting a thermistor in an electromagnetic heating system according to an embodiment of the present invention. As shown in fig. 1, the method for detecting a thermistor in an electromagnetic heating system according to an embodiment of the present invention may include the following steps:
and S1, when the electromagnetic heating system is powered on, recording the temperature value obtained by the thermistor and recording as a first temperature value.
Specifically, when an electromagnetic heating system (e.g., an induction cooker) is powered on, a sampling value of the thermistor in this state is recorded as a first temperature value AD _0 (also called an initial value), which may be a temperature value at the moment of power-on or an average temperature value over a period of time (e.g., several milliseconds) after power-on.
And S2, when the electromagnetic heating system is in a standby state, recording the temperature value obtained by the thermistor and recording as a second temperature value.
Specifically, when the electromagnetic heating system is in the standby state, the sampled value of the thermistor in this state is recorded as the second temperature value AD _1, and this value may be the average value of the temperatures in the standby state or the temperature value at a certain time, and preferably this value is the average value of the temperatures in the standby state.
And S3, in the heating process of the electromagnetic heating system, acquiring the maximum temperature value and the minimum temperature value of the temperature values acquired by the thermistor in the second preset time every first preset time.
The first preset time and the second preset time may be calibrated according to actual conditions, for example, the first preset time may be 10ms, and the second preset time may be 2 s.
And S4, judging whether the thermistor is in a failure state or not according to the first temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the second temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value.
Specifically, during the heating process of the electromagnetic heating system, the temperature is sometimes in a temperature rising state and sometimes in a temperature maintaining state, and when the temperature is in the maintaining state, a sampling value of a thermistor for detecting the panel temperature is basically kept unchanged, and if the thermistor fails to be a resistor with a fixed resistance value, the thermistor is mistakenly considered to be in the failure state at this time, so that a corresponding protection program is executed, and the normal operation of the system is influenced.
Considering that when the electromagnetic heating system is powered on, the sampling value of the thermistor is the initial temperature (the initial power-on after long-time shutdown, the sampling value is the ambient temperature), when the electromagnetic heating system is in the standby state, a small standby current exists in the circuit and weak heat is generated in the shell, and the detected standby temperature is equal to or slightly higher than the initial temperature. In the cooking process, under the normal condition, a larger difference value exists between the sampling value of the thermistor and the initial temperature, and if the difference value does not exist between the sampling value and the initial temperature when the system is powered on or the temperature in the standby state or the difference value is small, the thermistor is invalid, so that whether the thermistor is invalid or not can be accurately judged based on the principle, and the situation that the thermistor is invalid and misjudged under the constant temperature state is effectively avoided.
Specifically, during the heating (e.g., entering the cooking function) of the electromagnetic heating system, thermistor failure detection is performed every first preset time, e.g., 10 ms. When the thermistor failure detection is carried out, the sampling value of the thermistor is recorded in real time, and the maximum value and the minimum value in the recorded sampling value of the thermistor within the failure determination time, namely within the continuous second preset time such as 2s, are respectively recorded as a maximum temperature value AD _ max and a minimum temperature value AD _ min.
Then, when the failure determination time is up, namely the second preset time is up, judging whether the thermistor fails or not according to the first temperature value AD _0, the maximum temperature value AD _ max and the minimum temperature value AD _ min; or judging whether the thermistor fails according to the second temperature value AD _1, the maximum temperature value AD _ max and the minimum temperature value AD _ min; or judging whether the thermistor fails according to the first temperature value AD _0, the second temperature value AD _1, the maximum temperature value AD _ max and the minimum temperature value AD _ min. Because the participation of the static temperature value when the system is electrified and/or in the standby state of the system is increased in the failure judgment of the thermistor, the reliability and the accuracy of the failure judgment can be greatly improved, and the safety of the system is further improved.
According to an embodiment of the present invention, determining whether the thermistor is in a failure state according to the first temperature value, the maximum temperature value, and the minimum temperature value includes: acquiring a maximum value and a minimum value of the first temperature value, the maximum temperature value and the minimum temperature value, and calculating a difference value between the maximum value and the minimum value; judging whether the difference value between the maximum value and the minimum value is smaller than a first preset value or not; and if the difference value between the maximum value and the minimum value is smaller than a first preset value, judging that the thermistor is in a failure state. The first preset value can be calibrated according to actual conditions.
For example, if a first temperature value AD _0 recorded when the electromagnetic heating system is powered on is 20 ℃, and during the heating process of the system, a maximum temperature value AD _ max recorded within the failure determination time is 85 ℃ and a minimum temperature value AD _ min is 83 ℃, then the obtained maximum value T _ max is 85 ℃, the minimum value T _ min is 20 ℃, and a difference between the maximum value T _ max and the minimum value T _ min is 65 ℃, which is much greater than a first preset value, such as 5 ℃, it is determined that the thermistor is in a normal state (even though the sampling value of the thermistor is substantially unchanged during the heating process); and if the maximum temperature value AD _ max and the minimum temperature value AD _ min recorded in the failure determination time are 22 ℃ and 22 ℃ respectively in the system heating process, the obtained maximum value T _ max and the minimum value T _ min are 22 ℃, 20 ℃ and 2 ℃ respectively, wherein the difference between the maximum value T _ max and the minimum value T _ min is less than the first preset value 5 ℃, and then the thermistor is determined to be in the failure state and enters the protection state.
According to the detection method of the thermistor in the electromagnetic heating system, whether the thermistor fails or not is judged according to the static temperature value when the system is powered on and the dynamic temperature value in the heating process, so that the accuracy and the reliability of judgment are greatly improved, and the safety of the system is further improved.
According to another embodiment of the present invention, determining whether the thermistor is in a failure state according to the second temperature value, the maximum temperature value, and the minimum temperature value includes: acquiring the maximum value and the minimum value of the second temperature value, the maximum temperature value and the minimum temperature value, and calculating the difference value between the maximum value and the minimum value; judging whether the difference value between the maximum value and the minimum value is smaller than a second preset value or not; and if the difference value between the maximum value and the minimum value is smaller than a second preset value, judging that the thermistor is in a failure state. And the second preset value can be calibrated according to the actual condition.
For example, if the second temperature value AD _1 recorded when the electromagnetic heating system is in the standby state is 21 ℃, and during the system heating process, the maximum temperature value AD _ max recorded within the failure determination time is 85 ℃ and the minimum temperature value AD _ min is 83 ℃, then the obtained maximum value T _ max is 85 ℃, the minimum value T _ min is 21 ℃, and the difference between the maximum value T _ max and the minimum value T _ min is 64 ℃ and is much greater than the second preset value, such as 5 ℃, it is determined that the thermistor is in the normal state (even though the sampling value of the thermistor is substantially unchanged during the heating process); and if the maximum temperature value AD _ max and the minimum temperature value AD _ min recorded in the failure determination time are 22 ℃ and 22 ℃ respectively in the system heating process, the obtained maximum value T _ max is 22 ℃, the minimum value T _ min is 21 ℃, the difference value between the maximum value T _ max and the minimum value T _ min is 1 ℃ and is less than the second preset value 5 ℃, and then the thermistor is determined to be in the failure state and enters the protection state.
Therefore, according to the detection method of the thermistor in the electromagnetic heating system, whether the thermistor fails or not is judged according to the static temperature value in the standby state of the system and the dynamic temperature value in the heating process, and the accuracy and the reliability of judgment can be greatly improved, so that the safety of the system is improved.
In order to further improve the accuracy and reliability of the judgment, in the embodiment of the invention, whether the thermistor fails or not can be judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and standby.
Specifically, according to yet another embodiment of the present invention, determining whether the thermistor is in a failure state according to the first temperature value, the second temperature value, the maximum temperature value, and the minimum temperature value includes: acquiring a maximum value and a minimum value of the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value, and calculating a difference value between the maximum value and the minimum value; judging whether the difference value between the maximum value and the minimum value is smaller than a third preset value or not; and if the difference value between the maximum value and the minimum value is less than a third preset value, judging that the thermistor is in a failure state. And the third preset value can be calibrated according to the actual situation.
For example, if a first temperature value AD _0 recorded when the electromagnetic heating system is powered on is 20 ℃, a second temperature value AD _1 recorded when the system is in a standby state is 21 ℃, and in the system heating process, a maximum temperature value AD _ max recorded within the failure determination time is 85 ℃, and a minimum temperature value AD _ min is 83 ℃, then the obtained maximum value T _ max is 85 ℃, the minimum value T _ min is 20 ℃, and a difference between the maximum value T _ max and the minimum value T _ min is 65 ℃ which is far greater than a third preset value such as 5 ℃, it is determined that the thermistor is in a normal state (even though a sampling value of the thermistor is substantially unchanged during the heating process); and if the maximum temperature value AD _ max and the minimum temperature value AD _ min recorded in the failure determination time are 22 ℃ and 22 ℃ respectively in the system heating process, the obtained maximum value T _ max and the minimum value T _ min are 22 ℃, 20 ℃ and 2 ℃ respectively, wherein the difference between the maximum value T _ max and the minimum value T _ min is less than a third preset value of 5 ℃, and the thermistor is judged to be in a failure state and enters a protection state. Therefore, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and in standby, so that the judgment accuracy and reliability are greatly improved, and the safety of the system is further improved.
Specifically, as shown in fig. 2, the method for detecting a thermistor in an electromagnetic heating system may include the following steps:
and S001, judging whether the sampling of the thermistor is finished or not when the thermistor is powered on. If yes, go to step S004; if not, step S002 is performed.
And S002, performing sampling detection on the thermistor during electrification, recording a first temperature value AD _0, and completing the electrification sampling.
S003, second temperature value AD _1 is set to AD _0, and minimum temperature value AD _ min is set to maximum temperature value AD _ max is set to AD _ 0.
And S004, judging whether the system is in a cooking function state. If yes, go to step S006; if not, step S005 is performed.
S005, the thermistor in standby samples and detects, and updates the second temperature value AD _ 1.
And S006, detecting the thermistor sample during the cooking function, and updating the sample value AD _ temp.
S007, judging whether the AD _ temp is larger than the AD _ max. If yes, go to step S008; if not, step S009 is performed.
S008, let AD _ max be AD _ temp.
S009, judging whether the AD _ temp is smaller than the AD _ max. If yes, executing step S010; if not, go to step S011.
S010, let AD _ min be AD _ temp.
And S011, adding one to the failure judgment timing of the thermistor.
S012, judge whether to reach the time of judging the time of the thermal resistor failure. If yes, executing step S013; if not, return to step S004.
And S013, calculating the maximum value and the minimum value of the four numbers AD _0, AD _1, AD _ max and AD _ min, wherein the maximum value is assigned to AD _ max, and the minimum value is assigned to AD _ min.
S014, whether AD _ max-AD _ min is smaller than a set judgment value is judged. If yes, go to step S015; if not, the thermistor is in a normal state, and the process returns to step S004.
And S015, the thermistor is failed and enters a protection state.
It should be noted that, in the process of heating by the electromagnetic heating system, if the system enters a standby state (for example, the user finishes cooking once, takes away the cooking utensil, and the system enters the standby state), and when the system executes the heating program again, the thermistor is still determined to be invalid by using the first temperature value and/or the second temperature value recorded at the beginning of the heating as the static temperature value, so as to ensure the accuracy of the determination.
In addition, after the electromagnetic heating system finishes heating and stops, if the time interval between the restart heating and the current heating is shorter, in order to ensure the accuracy of thermistor failure judgment, the system also judges whether the time interval of two times of power-on is smaller than a first preset time or whether a first temperature value recorded during power-on is larger than a certain value, if so, the first temperature value and/or a second temperature value recorded during the previous power-on are still used as static temperature values to judge the failure of the thermistor, thereby effectively avoiding the problem that the failure judgment of the thermistor in the heating process is influenced because the two times of heating are too short and the system is not cooled.
In summary, according to the detection method of the thermistor in the electromagnetic heating system in the embodiment of the present invention, when the electromagnetic heating system is powered on, the temperature value obtained by the thermistor is recorded as the first temperature value, when the electromagnetic heating system is in the standby state, the temperature value obtained by the thermistor is recorded as the second temperature value, and in the heating process of the electromagnetic heating system, the maximum temperature value and the minimum temperature value among the temperature values obtained by the thermistor within the second preset time period are obtained every first preset time period. And then, judging whether the thermistor is in a failure state or not according to the first temperature value and/or the second temperature value, the maximum temperature value and the minimum temperature value. Therefore, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and in standby, so that the judgment accuracy and reliability are greatly improved, and the safety of the system is further improved.
In addition, an embodiment of the present invention also provides a non-transitory computer-readable storage medium, and the program is executed by a processor to implement the detection method of the thermistor in the electromagnetic heating system as described above.
According to the non-transitory computer readable storage medium of the embodiment of the invention, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and standby by executing the detection method of the thermistor in the electromagnetic heating system, so that the judgment accuracy and reliability are greatly improved, and the safety of the system is further improved.
Fig. 3 is a block schematic diagram of a detection device of a thermistor in an electromagnetic heating system according to an embodiment of the present invention. As shown in fig. 3, the detecting apparatus of the thermistor in the electromagnetic heating system according to the embodiment of the present invention may include a first recording module 10, a second recording module 20, a third recording module 30, and a judging module 40.
The first recording module 10 is configured to record a temperature value obtained by the thermistor when the electromagnetic heating system is powered on, and record the temperature value as a first temperature value. The second recording module 20 is configured to record a temperature value obtained by the thermistor when the electromagnetic heating system is in a standby state, and record the temperature value as a second temperature value. The third recording module 30 is configured to obtain a maximum temperature value and a minimum temperature value of temperature values obtained by the thermistor in a second preset time every first preset time in the heating process of the electromagnetic heating system. The judging module 40 is configured to judge whether the thermistor is in a failure state according to the first temperature value, the maximum temperature value, and the minimum temperature value, or judge whether the thermistor is in a failure state according to the second temperature value, the maximum temperature value, and the minimum temperature value, or judge whether the thermistor is in a failure state according to the first temperature value, the second temperature value, the maximum temperature value, and the minimum temperature value.
According to an embodiment of the present invention, the determining module 40 determines whether the thermistor is in a failure state according to a first temperature value, a maximum temperature value and a minimum temperature value, wherein the determining module 40 obtains a maximum value and a minimum value of the first temperature value, the maximum temperature value and the minimum temperature value, and calculates a difference between the maximum value and the minimum value; the judging module 40 judges whether the difference value between the maximum value and the minimum value is smaller than a first preset value; if the difference between the maximum value and the minimum value is smaller than the first preset value, the judgment module 40 judges that the thermistor is in a failure state.
According to another embodiment of the present invention, the determining module 40 determines whether the thermistor is in the failure state according to the second temperature value, the maximum temperature value and the minimum temperature value, wherein the determining module 40 obtains the maximum value and the minimum value of the second temperature value, the maximum temperature value and the minimum temperature value, and calculates a difference between the maximum value and the minimum value; the judging module 40 judges whether the difference value between the maximum value and the minimum value is smaller than a second preset value; if the difference between the maximum value and the minimum value is smaller than the second preset value, the judgment module 40 judges that the thermistor is in a failure state.
According to another embodiment of the present invention, the determining module 40 determines whether the thermistor is in a failure state according to a first temperature value, a second temperature value, a maximum temperature value and a minimum temperature value, wherein the determining module 40 obtains a maximum value and a minimum value of the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value, and calculates a difference between the maximum value and the minimum value; the judging module 40 judges whether the difference value between the maximum value and the minimum value is smaller than a third preset value; if the difference between the maximum value and the minimum value is smaller than the third preset value, the judgment module 40 judges that the thermistor is in a failure state.
It should be noted that details not disclosed in the detection apparatus for the thermistor in the electromagnetic heating system according to the embodiment of the present invention refer to details disclosed in the detection method for the thermistor in the electromagnetic heating system according to the embodiment of the present invention, and detailed descriptions thereof are omitted here.
According to the detection device of the thermistor in the electromagnetic heating system, the first recording module records the temperature value obtained by the thermistor when the electromagnetic heating system is powered on as the first temperature value, the second recording module records the temperature value obtained by the thermistor when the electromagnetic heating system is in the standby state as the second temperature value, and then the third recording module records the maximum temperature value and the minimum temperature value in the temperature values obtained by the thermistor in the second preset time which is continuously preset every first preset time in the heating process of the electromagnetic heating system. And finally, judging whether the thermistor is in a failure state or not by the judging module according to the first temperature value and/or the second temperature value, the maximum temperature value and the minimum temperature value. Therefore, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and in standby, so that the judgment accuracy and reliability are greatly improved, and the safety of the system is further improved.
Fig. 4 is a block schematic diagram of an electromagnetic heating system according to an embodiment of the present invention. As shown in fig. 4, an electromagnetic heating system 1000 according to an embodiment of the present invention includes the detection apparatus 100 of the thermistor described above.
According to the electromagnetic heating system, whether the thermistor fails or not is judged according to the static temperature value and the dynamic temperature value in the heating process when the system is powered on and standby through the detection device of the thermistor, so that the accuracy and the reliability of judgment are greatly improved, and the safety of the system is further improved.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
In addition, in the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method for detecting a thermistor in an electromagnetic heating system is characterized by comprising the following steps:
when the electromagnetic heating system is powered on, recording a temperature value obtained through the thermistor and recording as a first temperature value;
when the electromagnetic heating system is in a standby state, recording a temperature value obtained through the thermistor and recording as a second temperature value;
in the process of heating the electromagnetic heating system, acquiring a maximum temperature value and a minimum temperature value of temperature values acquired by the thermistor within continuous preset second preset time at intervals of first preset time;
judging whether the thermistor is in a failure state or not according to the first temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the second temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value.
2. The method for detecting a thermistor in an electromagnetic heating system according to claim 1, wherein the determining whether the thermistor is in a failure state according to the first temperature value, the maximum temperature value, and the minimum temperature value includes:
acquiring the maximum value and the minimum value of the first temperature value, the maximum temperature value and the minimum temperature value, and calculating the difference value between the maximum value and the minimum value;
judging whether the difference value between the maximum value and the minimum value is smaller than a first preset value or not;
and if the difference value between the maximum value and the minimum value is smaller than the first preset value, judging that the thermistor is in the failure state.
3. The method for detecting a thermistor in an electromagnetic heating system according to claim 1, wherein the determining whether the thermistor is in a failure state according to the second temperature value, the maximum temperature value, and the minimum temperature value includes:
acquiring the maximum value and the minimum value of the second temperature value, the maximum temperature value and the minimum temperature value, and calculating the difference value between the maximum value and the minimum value;
judging whether the difference value between the maximum value and the minimum value is smaller than a second preset value or not;
and if the difference value between the maximum value and the minimum value is smaller than the second preset value, judging that the thermistor is in the failure state.
4. The method for detecting a thermistor in an electromagnetic heating system according to claim 1, wherein the determining whether the thermistor is in a failure state according to the first temperature value, the second temperature value, the maximum temperature value, and the minimum temperature value includes:
acquiring the maximum value and the minimum value of the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value, and calculating the difference value between the maximum value and the minimum value;
judging whether the difference value between the maximum value and the minimum value is smaller than a third preset value;
and if the difference value between the maximum value and the minimum value is smaller than the third preset value, judging that the thermistor is in the failure state.
5. A non-transitory computer-readable storage medium having stored thereon a computer program, wherein the program, when executed by a processor, implements a method for detecting a thermistor in an electromagnetic heating system as set forth in any one of claims 1 to 4.
6. A device for detecting a thermistor in an electromagnetic heating system, comprising:
the first recording module is used for recording a temperature value obtained by the thermistor when the electromagnetic heating system is powered on and recording the temperature value as a first temperature value;
the second recording module is used for recording a temperature value obtained by the thermistor and recording the temperature value as a second temperature value when the electromagnetic heating system is in a standby state;
the third recording module is used for acquiring the maximum temperature value and the minimum temperature value of the temperature values acquired by the thermistor within the continuous preset second preset time at intervals of the first preset time in the heating process of the electromagnetic heating system;
and the judging module is used for judging whether the thermistor is in a failure state or not according to the first temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the second temperature value, the maximum temperature value and the minimum temperature value, or judging whether the thermistor is in a failure state or not according to the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value.
7. The apparatus for detecting thermistor in an electromagnetic heating system according to claim 6, wherein the determining module determines whether the thermistor is in a failure state according to the first temperature value, the maximum temperature value, and the minimum temperature value,
the judgment module acquires the maximum value and the minimum value of the first temperature value, the maximum temperature value and the minimum temperature value, and calculates the difference value between the maximum value and the minimum value;
the judgment module judges whether the difference value between the maximum value and the minimum value is smaller than a first preset value;
and if the difference value between the maximum value and the minimum value is smaller than the first preset value, the judging module judges that the thermistor is in the failure state.
8. The apparatus for detecting thermistor in an electromagnetic heating system according to claim 6, wherein the determining module determines whether the thermistor is in a failure state according to the second temperature value, the maximum temperature value, and the minimum temperature value,
the judgment module acquires the maximum value and the minimum value of the second temperature value, the maximum temperature value and the minimum temperature value and calculates the difference value between the maximum value and the minimum value;
the judgment module judges whether the difference value between the maximum value and the minimum value is smaller than a second preset value;
and if the difference value between the maximum value and the minimum value is smaller than the second preset value, the judging module judges that the thermistor is in the failure state.
9. The apparatus for detecting thermistor in an electromagnetic heating system according to claim 6, wherein the determining module determines whether the thermistor is in a failure state according to the first temperature value, the second temperature value, the maximum temperature value, and the minimum temperature value,
the judgment module acquires the maximum value and the minimum value of the first temperature value, the second temperature value, the maximum temperature value and the minimum temperature value, and calculates the difference value between the maximum value and the minimum value;
the judgment module judges whether the difference value between the maximum value and the minimum value is smaller than a third preset value;
and if the difference value between the maximum value and the minimum value is smaller than the third preset value, the judgment module judges that the thermistor is in the failure state.
10. An electromagnetic heating system comprising a thermistor detection device according to any of claims 6 to 9.
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| US4788398A (en) * | 1987-09-30 | 1988-11-29 | General Electric Company | Temperature sensor failure detection arrangement using a heater energy counter |
| JP3629982B2 (en) * | 1998-10-27 | 2005-03-16 | 日産自動車株式会社 | Diagnostic device for coolant temperature sensor |
| JP4963052B2 (en) * | 2006-09-22 | 2012-06-27 | Ｕｄトラックス株式会社 | Exhaust temperature sensor abnormality detection device |
| JP5336042B2 (en) * | 2006-12-18 | 2013-11-06 | オークマ株式会社 | Anomaly detection method of temperature sensor in machine tool |
| CN101216356A (en) * | 2007-01-04 | 2008-07-09 | 海尔集团公司 | Temperature sensor failure testing method and apparatus |
| CN104038221B (en) * | 2013-03-07 | 2017-04-19 | 美的集团股份有限公司 | Electric heater and method for carrying out fault identification on AD input device of electric heater |
| CN105423482B (en) * | 2015-10-30 | 2019-01-22 | 四川长虹电器股份有限公司 | A kind of temperature checking method and air-conditioning |
| CN105353250B (en) * | 2015-11-19 | 2018-01-23 | 珠海格力电器股份有限公司 | A kind of detection method and device of the failure of electromagnetic oven temperature-sensitive bag |
| CN106979597A (en) * | 2017-05-08 | 2017-07-25 | 广东美的暖通设备有限公司 | Control method and device when air-conditioning system and its temperature sensor fault |
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