CN109506811B - 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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- CN109506811B CN109506811B CN201710831528.7A CN201710831528A CN109506811B CN 109506811 B CN109506811 B CN 109506811B CN 201710831528 A CN201710831528 A CN 201710831528A CN 109506811 B CN109506811 B CN 109506811B
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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
- G01K15/007—Testing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C7/00—Stoves or ranges heated by electric energy
- F24C7/08—Arrangement or mounting of control or safety devices
- F24C7/081—Arrangement or mounting of control or safety devices on stoves
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- 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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- 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
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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: in the heating process of the electromagnetic heating system, controlling the fan to be in a closed state at intervals of first preset time, recording a temperature value obtained by the thermistor when the fan is closed, and recording the temperature value as a first temperature value; after delaying the second preset time, recording the temperature value obtained by the thermistor again, and recording as a second temperature value; calculating a temperature difference value between the first temperature value and the second temperature value, and judging whether the temperature difference value is smaller than or equal to a first temperature threshold value; if yes, judging that the thermistor is in a failure state. According to the method, the temperature change of the thermistor is detected by closing the fan for a period of time at intervals, and whether the thermistor fails or not is judged according to the temperature change, so that the failure of the thermistor can be effectively detected to be a fixed value, and the fixed value is larger than a certain value, so that the failure detection is more accurate.
Description
Technical Field
The invention relates to the technical field of household appliances, 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
Generally, in an electromagnetic heating system such as an electromagnetic oven, temperature sampling is performed by a thermistor, wherein when the thermistor fails, if the electromagnetic heating system is continuously controlled to work, damage to the system or even a safety accident occurs, so that failure detection of the thermistor plays an important role.
At present, when failure detection is performed on a thermistor, when the thermistor is not short-circuited and the sampling value of the thermistor is detected to be greater than a certain value, the thermistor failure detection is not performed any more. However, the failure condition cannot be detected when the sampling value of the thermistor is greater than a certain value, the thermistor is not short-circuited, and the failure of the thermistor is a fixed value, so that risks such as dry burning, fire, damage of internal power devices and the like of the system are caused.
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, in which a fan is turned off for a period of time at intervals to detect a temperature change of the thermistor, and whether the thermistor fails or not is determined according to the temperature change, so that the failure of the thermistor can be effectively detected as a fixed value, and the fixed value is greater than a certain value, so that the failure detection is more accurate.
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 invention is to propose 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, where the electromagnetic heating system includes a fan, and the method includes the following steps: in the process of heating the electromagnetic heating system, controlling the fan to be in a closed state at intervals of first preset time, recording a temperature value obtained by the thermistor when the fan is closed, and recording the temperature value as a first temperature value; after delaying for a second preset time, recording the temperature value obtained by the thermistor again, and recording as a second temperature value; calculating a temperature difference value between the first temperature value and the second temperature value, and judging whether the temperature difference value is smaller than or equal to a first temperature threshold value; and if the temperature difference value is less than or equal to the first temperature threshold value, judging that the thermistor is in a failure state.
According to the detection method of the thermistor in the electromagnetic heating system, in the heating process of the electromagnetic heating system, the fan is controlled to be in a closed state every first preset time, the temperature value obtained through the thermistor when the fan is closed is recorded as a first temperature value, and after the second preset time is delayed, the temperature value obtained through the thermistor is recorded again and recorded as a second temperature value. And then calculating the temperature difference between the first temperature value and the second temperature value, judging whether the temperature difference is less than or equal to a first temperature threshold value, and if so, judging that the thermistor is in a failure state. Therefore, the failure of the thermistor can be effectively detected to be a fixed value, and the fixed value is larger than a certain value, so that the failure detection is more accurate.
In addition, the detection method of the thermistor in the electromagnetic heating system proposed according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, if the temperature difference is greater than the first temperature threshold, it is determined that the thermistor is not in the failure state, and the fan is controlled to be in the on state.
According to one embodiment of the invention, when the thermistor is judged to be in the failure state, the electromagnetic heating system is controlled to stop heating, and an alarm prompt is sent.
According to an embodiment of the present invention, before controlling the fan to be in the off state, the method further includes: acquiring the variation or the variation rate of the temperature value acquired by the thermistor within third preset time; judging whether the variation is smaller than or equal to a first preset variation or judging whether the variation rate is smaller than or equal to a first preset variation rate; and if the variation is smaller than or equal to the first preset variation or the variation rate is smaller than or equal to the first preset variation rate, controlling the fan to be in a closed state.
To achieve the above object, a second aspect of the present invention provides a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the method for detecting a thermistor in an electromagnetic heating system as set forth in the first aspect of the present invention.
According to the non-transitory computer readable storage medium of the embodiment of the invention, by executing the detection method of the thermistor in the electromagnetic heating system, in the heating process of the electromagnetic heating system, the fan is turned off for a period of time at intervals to detect the temperature change of the thermistor, and whether the thermistor fails or not is judged according to the temperature change, so that the failure of the thermistor can be effectively detected to be a fixed value, and the fixed value is greater than a certain value, so that the failure detection is more accurate.
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, where the electromagnetic heating system includes a fan, and the device includes a recording module and a control module, where the control module is configured to control the fan to be in a turn-off state every first preset time during a heating process of the electromagnetic heating system; the recording module is used for recording a temperature value obtained by the thermistor when the fan is closed, recording the temperature value as a first temperature value, and recording a temperature value obtained by the thermistor after the fan is closed for a second preset time, recording the temperature value as a second temperature value; the control module is further configured to calculate a temperature difference between the first temperature value and the second temperature value, determine whether the temperature difference is less than or equal to a first temperature threshold, and determine that the thermistor is in a failure state when the temperature difference is less than or equal to the first temperature threshold.
According to the detection device of the thermistor in the electromagnetic heating system, the fan is controlled to be in a closed state every other first preset time in the heating process of the electromagnetic heating system through the control module, then the temperature value obtained through the thermistor when the fan is closed is recorded through the recording module and recorded as the first temperature value, and the temperature value obtained through the thermistor after the fan is closed for the second preset time is recorded and recorded as the second temperature value. And finally, the control module calculates the temperature difference between the first temperature value and the second temperature value, and judges that the thermistor is in a failure state when the temperature difference is less than or equal to a first temperature threshold value. Therefore, the failure of the thermistor can be effectively detected to be a fixed value, and the fixed value is larger than a certain value, so that the failure detection is more accurate.
In addition, the detection device for the thermistor in the electromagnetic heating system according to the above embodiment of the present invention may further have the following additional technical features:
according to one embodiment of the invention, if the temperature difference is greater than the first temperature threshold, the control module determines that the thermistor is not in the failure state and controls the fan to be in the on state.
According to an embodiment of the present invention, the above apparatus for detecting a thermistor in an electromagnetic heating system further includes: and the control module is connected with the alarm module, and when the thermistor is judged to be in the failure state, the control module also controls the electromagnetic heating system to stop heating and sends out an alarm prompt through the alarm module.
According to an embodiment of the present invention, the above apparatus for detecting a thermistor in an electromagnetic heating system further includes: the acquisition module is used for acquiring the variation or the variation rate of the temperature value acquired by the thermistor within third preset time before the control module controls the fan to be in a closed state; the judging module is used for judging whether the variation is smaller than or equal to a first preset variation or judging whether the variation rate is smaller than or equal to a first preset variation rate; if the variation is smaller than or equal to the first preset variation or the variation rate is smaller than or equal to the first preset variation rate, the control module controls the fan to be in a closed state.
In order to achieve the above object, a fourth aspect of the present invention provides an electromagnetic heating system, which includes the thermistor detection device according to the third aspect of the present invention.
According to the electromagnetic heating system provided by the embodiment of the invention, through the detection device, in the heating process of the electromagnetic heating system, the temperature change of the thermistor is detected by closing the fan for a period of time at intervals, and whether the thermistor fails or not is judged according to the temperature change, so that the failure of the thermistor can be effectively detected to be a fixed value, and the failure detection is more accurate under the condition that the fixed value is greater than a certain value.
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 block schematic diagram of a thermistor detection device in an electromagnetic heating system according to an embodiment of the present invention; and
fig. 3 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. Wherein the electromagnetic heating system comprises a fan (fan).
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, controlling the fan to be in a closed state every a first preset time in the heating process of the electromagnetic heating system, and recording a temperature value obtained by the thermistor when the fan is closed, and recording the temperature value as a first temperature value.
And S2, after delaying for a second preset time, recording the temperature value obtained by the thermistor again, and recording as a second temperature value.
S3, calculating the temperature difference between the first temperature value and the second temperature value, and judging whether the temperature difference is less than or equal to the first temperature threshold value. The first preset time, the second preset time and the first temperature threshold value can be calibrated according to actual conditions.
And S4, if the temperature difference is less than or equal to the first temperature threshold, judging that the thermistor is in a failure state.
According to one embodiment of the invention, if the temperature difference is greater than the first temperature threshold, the thermistor is judged not to be in a failure state, and the fan is controlled to be in a starting state.
Further, when the thermistor is judged to be in a failure state, the electromagnetic heating system is controlled to stop heating, and an alarm prompt is sent out.
Specifically, for an electromagnetic heating system (such as an induction cooker) with a fan, the fan is generally always in an on state during the heating process of the electromagnetic heating system to discharge heat in the system, so as to achieve the purpose of cooling. If the fan is controlled to be in a closed state, heat in the system cannot be discharged in time, so that the temperature in the system is increased, and the thermistor can be subjected to failure detection based on the principle.
Specifically, in the heating process of the electromagnetic heating system, the fan is controlled to be in an on state, then the fan is controlled to be in an off state at intervals of a first preset time, a temperature value obtained through the thermistor at the time of turning off is recorded, namely a sampling value of the thermistor is recorded as a first temperature value, then the fan is kept turned off for a period of time, and a temperature value obtained through the thermistor is recorded again and recorded as a second temperature value. Because the system temperature after the fan is closed for a period of time is higher than the temperature when the fan is just closed, under normal conditions, a larger difference value exists between the first temperature value and the second temperature value detected by the thermistor, and if the second temperature value is not changed greatly or hardly relative to the first temperature value, the thermistor is invalid.
For example, if the temperature difference obtained twice by the thermistor is 5 ℃ and the first temperature threshold is 0.5 ℃ when the fan is turned off, the thermistor is in a normal state, and at this time, the electromagnetic heating system continues to work, the fan is recovered to normally operate, and the fan is tested again after a period of time delay; if the temperature difference value obtained by the thermistor for two times is 0 ℃, the temperature change cannot be detected by the thermistor, the thermistor fails, and at the moment, the electromagnetic heating system immediately stops heating and sends out alarm prompts (such as flashing of a warning lamp, sounding of a buzzer and the like) so that an operator can perform corresponding treatment according to the prompts.
Therefore, the detection method of the thermistor according to the embodiment of the invention detects the temperature change of the thermistor by turning off the fan for a period of time at intervals, and judges whether the thermistor fails according to the temperature change, so that the effective detection of the thermistor can be realized, including the failure condition when the sampling value of the thermistor is greater than a certain value, the thermistor is not short-circuited, and the failure of the thermistor is a fixed value, thereby greatly improving the accuracy of failure detection.
In view of the importance of heat dissipation in the heating process of the electromagnetic heating system, in order to avoid poor heat dissipation effect and reduced fan reliability caused by frequent start and stop of the fan, and influence on the system control due to the fact that the fan is closed, in the embodiment of the invention, the thermistor can be detected through the temperature change value in the running process of the fan, and only when some special conditions occur, for example, the detected temperature value is unchanged or changes little, the thermistor is detected through the mode of controlling to close the fan.
According to an embodiment of the present invention, before controlling the fan to be in the off state, the method further includes: acquiring the variation or the variation rate of the temperature value acquired by the thermistor within third preset time; judging whether the variation is smaller than or equal to a first preset variation or judging whether the variation rate is smaller than or equal to a first preset variation rate; and if the variation is smaller than or equal to a first preset variation or the variation rate is smaller than or equal to a first preset variation rate, controlling the fan to be in a closed state. The third preset time, the first preset variation and the first preset variation rate can be calibrated according to actual conditions.
Specifically, in the heating process of the electromagnetic heating system, the fan is controlled to be always in an on state, and in the process that the fan is in the on state, the current temperature value is obtained through the thermistor in real time, and the variation or change rate of the temperature value in a period of time (such as a third preset time) is judged. If the variation is larger than the first preset variation or the variation rate is larger than the first preset variation rate, the thermistor is in a normal state; if the variation is smaller than or equal to the first preset variation or the variation rate is smaller than or equal to the first preset variation rate, the situation that the current thermistor is possibly failed is shown, and at the moment, the thermistor is detected by controlling to close the fan so as to further determine whether the thermistor is in a failure state.
In summary, according to the detection method of the thermistor in the electromagnetic heating system in the embodiment of the invention, in the heating process of the electromagnetic heating system, the fan is controlled to be in the off state every a first preset time, and the temperature value obtained by the thermistor when the fan is off is recorded as the first temperature value, and after a second preset time is delayed, the temperature value obtained by the thermistor is recorded again as the second temperature value. And then calculating the temperature difference between the first temperature value and the second temperature value, judging whether the temperature difference is less than or equal to a first temperature threshold value, and if so, judging that the thermistor is in a failure state. Therefore, the effective detection of the thermistor can be realized, and the failure detection accuracy is greatly improved under the failure condition that the sampling value of the thermistor is greater than a certain value, the thermistor is not short-circuited and the failure of the thermistor is a fixed value.
In order to implement the above embodiments, the present invention also proposes a non-transitory computer-readable storage medium, on which a computer program is stored, which when executed by a processor implements the above-mentioned method for detecting a thermistor in an electromagnetic heating system.
According to the non-transitory computer readable storage medium of the embodiment of the invention, by executing the detection method of the thermistor in the electromagnetic heating system, in the heating process of the electromagnetic heating system, the fan is turned off for a period of time at intervals to detect the temperature change of the thermistor, and whether the thermistor fails or not is judged according to the temperature change, so that the failure of the thermistor can be effectively detected to be a fixed value, and the fixed value is greater than a certain value, so that the failure detection is more accurate.
Fig. 2 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. 2, the electromagnetic heating system includes a blower 30, and the detection device of the thermistor includes a control module 10 and a recording module 20.
The control module 10 is configured to control the fan 30 to be in a turned-off state every first preset time in a heating process of the electromagnetic heating system. The recording module 20 is configured to record a temperature value obtained by the thermistor when the fan 30 is turned off, and record the temperature value as a first temperature value, and record a temperature value obtained by the thermistor after the fan 30 is turned off for a second preset time, and record the temperature value as a second temperature value. The control module 10 is further configured to calculate a temperature difference between the first temperature value and the second temperature value, determine whether the temperature difference is smaller than or equal to a first temperature threshold, and determine that the thermistor is in a failure state when the temperature difference is smaller than or equal to the first temperature threshold.
According to an embodiment of the present invention, if the temperature difference is greater than the first temperature threshold, the control module 10 determines that the thermistor is not in the failure state and controls the fan 30 to be in the on state.
According to an embodiment of the present invention, as shown in fig. 2, the detection apparatus further includes an alarm module 40, and the control module 10 is connected to the alarm module 40, wherein when it is determined that the thermistor is in the failure state, the control module 10 further controls the electromagnetic heating system to stop heating, and sends an alarm prompt through the alarm module 40.
According to an embodiment of the present invention, as shown in fig. 2, the above-mentioned detection apparatus further includes an obtaining module 50 and a determining module 60. The obtaining module 50 is configured to obtain a variation or a variation rate of the temperature value obtained by the thermistor within a third preset time before the control module 10 controls the fan 30 to be in the off state; the judging module 60 is configured to judge whether the variation is smaller than or equal to a first preset variation, or judge whether the variation rate is smaller than or equal to a first preset variation rate; if the variation is smaller than or equal to the first preset variation or the variation rate is smaller than or equal to the first preset variation rate, the control module 10 controls the fan 30 to be in the off 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 fan is controlled to be in a closed state every other first preset time in the heating process of the electromagnetic heating system through the control module, then the temperature value obtained through the thermistor when the fan is closed is recorded through the recording module and recorded as the first temperature value, and the temperature value obtained through the thermistor after the fan is closed for the second preset time is recorded and recorded as the second temperature value. And finally, the control module calculates the temperature difference between the first temperature value and the second temperature value, and judges that the thermistor is in a failure state when the temperature difference is less than or equal to a first temperature threshold value. Therefore, the failure of the thermistor can be effectively detected to be a fixed value, and the fixed value is larger than a certain value, so that the failure detection is more accurate.
Fig. 3 is a block schematic diagram of an electromagnetic heating system according to an embodiment of the present invention. As shown in fig. 3, an electromagnetic heating system 1000 according to an embodiment of the present invention includes the detection apparatus 100 of the thermistor.
According to the electromagnetic heating system provided by the embodiment of the invention, through the detection device of the thermistor, in the heating process of the electromagnetic heating system, the temperature change of the thermistor is detected by closing the fan for a period of time at intervals, and whether the thermistor fails or not is judged according to the temperature change, so that the failure of the thermistor can be effectively detected to be a fixed value, and the failure detection is more accurate under the condition that the fixed value is greater than a certain value.
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.
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.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
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. 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.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. 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 (8)
1. A method for detecting a thermistor in an electromagnetic heating system is characterized in that the electromagnetic heating system comprises a fan, and the method comprises the following steps:
in the process of heating the electromagnetic heating system, controlling the fan to be in a closed state at intervals of first preset time, recording a temperature value obtained by the thermistor when the fan is closed, and recording the temperature value as a first temperature value;
after delaying for a second preset time, recording the temperature value obtained by the thermistor again, and recording as a second temperature value;
calculating a temperature difference value between the first temperature value and the second temperature value, and judging whether the temperature difference value is smaller than or equal to a first temperature threshold value; and
if the temperature difference is smaller than or equal to the first temperature threshold, judging that the thermistor is in a failure state;
before controlling the fan is in the off state, the method further comprises the following steps:
acquiring the variation or the variation rate of the temperature value acquired by the thermistor within third preset time;
judging whether the variation is smaller than or equal to a first preset variation or judging whether the variation rate is smaller than or equal to a first preset variation rate;
and if the variation is smaller than or equal to the first preset variation or the variation rate is smaller than or equal to the first preset variation rate, controlling the fan to be in a closed state.
2. The method for detecting the thermistor in the electromagnetic heating system according to claim 1, wherein if the temperature difference is greater than the first temperature threshold, it is determined that the thermistor is not in the failure state, and the fan is controlled to be in an on state.
3. The method for detecting a thermistor in an electromagnetic heating system according to claim 1, characterized in that when it is determined that the thermistor is in the failure state, the electromagnetic heating system is controlled to stop heating and an alarm prompt is issued.
4. 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 3.
5. A detection device for a thermistor in an electromagnetic heating system is characterized in that the electromagnetic heating system comprises a fan, the device comprises a recording module and a control module, wherein,
the control module is used for controlling the fan to be in a closed state every other first preset time in the heating process of the electromagnetic heating system;
the recording module is used for recording a temperature value obtained by the thermistor when the fan is closed, recording the temperature value as a first temperature value, and recording a temperature value obtained by the thermistor after the fan is closed for a second preset time, recording the temperature value as a second temperature value;
the control module is further configured to calculate a temperature difference between the first temperature value and the second temperature value, determine whether the temperature difference is less than or equal to a first temperature threshold, and determine that the thermistor is in a failure state when the temperature difference is less than or equal to the first temperature threshold;
further comprising:
the acquisition module is used for acquiring the variation or the variation rate of the temperature value acquired by the thermistor within third preset time before the control module controls the fan to be in a closed state;
the judging module is used for judging whether the variation is smaller than or equal to a first preset variation or judging whether the variation rate is smaller than or equal to a first preset variation rate;
if the variation is smaller than or equal to the first preset variation or the variation rate is smaller than or equal to the first preset variation rate, the control module controls the fan to be in a closed state.
6. The apparatus of claim 5, wherein if the temperature difference is greater than the first temperature threshold, the control module determines that the thermistor is not in the failed state and controls the fan to be in an on state.
7. The apparatus according to claim 5, further comprising an alarm module, wherein the control module is connected to the alarm module, and wherein when the thermistor is determined to be in the failure state, the control module further controls the electromagnetic heating system to stop heating and sends an alarm prompt through the alarm module.
8. An electromagnetic heating system comprising a thermistor detection device according to any of claims 5 to 7.
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| CN111896867A (en) * | 2020-07-11 | 2020-11-06 | 南京溪和泉仪器有限公司 | Detection device and detection method for bimetal temperature switch and thermistor temperature sensor |
| JP2022086151A (en) * | 2020-11-30 | 2022-06-09 | プライムプラネットエナジー＆ソリューションズ株式会社 | Method for detection, detector, and detection system |
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