CN108731039A - Method for detecting working state of temperature sensor and induction cooker - Google Patents
Method for detecting working state of temperature sensor and induction cooker Download PDFInfo
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- CN108731039A CN108731039A CN201710240734.0A CN201710240734A CN108731039A CN 108731039 A CN108731039 A CN 108731039A CN 201710240734 A CN201710240734 A CN 201710240734A CN 108731039 A CN108731039 A CN 108731039A
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- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 claims description 4
- 238000010411 cooking Methods 0.000 claims 5
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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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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Induction Heating Cooking Devices (AREA)
Abstract
The embodiment of the invention provides a method for detecting the working state of a temperature sensor and an induction cooker, wherein the method comprises the following steps: acquiring the temperature of a magnetic plate when the induction cooker is started and the temperature of at least one of an IGBT and a bridge rectifier; when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, setting a thermal identifier for the induction cooker; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature; and setting a working mark for indicating the working state for the temperature sensor according to the thermal mark, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate. Therefore, the phenomenon that the temperature sensor fails when the induction cooker is shut down when working at thermal equilibrium and is started up and working at once is avoided, and the detection accuracy of the state of the temperature sensor is improved.
Description
Technical Field
The embodiment of the invention relates to the technical field of household appliances, in particular to a method for detecting the working state of a temperature sensor and an induction cooker.
Background
An induction cooker is a common household appliance for heating. When the induction cooker works, high-frequency alternating current passes through the coil panel to enable the bottom of a pot placed on the induction cooker to generate eddy current, so that the pot arranged on the induction cooker is heated. And the electromagnetic oven also senses the temperature of the magnetic plate above the coil panel by using the temperature sensor, and when the temperature sensed by the temperature sensor reaches a preset temperature, the electromagnetic oven works in a thermal balance state. Therefore, the temperature sensor is an important component in the induction cooker, and the temperature sensed by the temperature sensor will affect the operation of the induction cooker, so that the induction cooker needs to detect whether the temperature sensor fails during operation. One way to do this is: and comparing the temperature change rate sensed by the temperature sensors for several times with a preset value, if the temperature change rate is greater than the preset value, considering that the temperature sensors are normal, and if the temperature change rate is less than the preset value, considering that the temperature sensors are invalid. However, when the induction cooker is turned off when working in thermal equilibrium and is immediately turned on for working, the temperature change rate sensed by the temperature sensor is close to zero, and the temperature sensor is misjudged to be invalid.
Disclosure of Invention
The embodiment of the invention provides a method for detecting the working state of a temperature sensor and an induction cooker, which are used for avoiding misjudgment of the working state of the temperature sensor.
In a first aspect, an embodiment of the present invention provides a method for detecting an operating state of a temperature sensor, including:
acquiring the temperature of a magnetic plate when the induction cooker is started and the temperature of at least one of an Insulated Gate Bipolar Transistor (IGBT) and a bridge stack;
when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, setting a thermal identifier for the induction cooker; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature;
and setting a working mark for indicating the working state for the temperature sensor according to the thermal mark, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate.
In a second aspect, an embodiment of the present invention provides an induction cooker, including:
the acquisition module is used for acquiring the temperature of the magnetic plate when the induction cooker is started and the temperature of at least one of the IGBT and the bridge rectifier;
the first setting module is used for setting a thermal identifier for the induction cooker when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature;
and the second setting module is used for setting a working identifier for indicating the working state of the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate.
In a third aspect, an embodiment of the present invention provides an induction cooker, including: the device comprises a magnetic plate, an IGBT, a bridge rectifier, a first temperature sensor, a second temperature sensor, a memory and a processor; the first temperature sensor, the second temperature sensor, the memory and the processor are electrically connected;
the first temperature sensor is used for detecting the temperature of the magnetic plate when the induction cooker is started;
the second temperature sensor is used for detecting the temperature of at least one of the IGBT and the bridge stack;
the memory is used for storing the temperature of the magnetic plate and the temperature of at least one of the IGBT and the bridge stack;
the processor is used for setting a thermal identifier for the induction cooker when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature; and setting a working identifier for indicating the working state for the first temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate.
According to the method for detecting the working state of the temperature sensor and the induction cooker, provided by the embodiment of the invention, the temperature of the magnetic plate and the temperature of at least one of the IGBT and the bridge pile are obtained when the induction cooker is started, the thermal identifier is set for the induction cooker when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge pile meets a second preset condition, and then the working identifier for indicating the working state is set for the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate. Because the hot mark set for the induction cooker is referred to when the working mark is set for the temperature sensor, the phenomenon that the temperature sensor fails when the induction cooker is shut down when working at the thermal balance and is started up and working at once is avoided, and the detection accuracy of the state of the temperature sensor is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting an operating state of a temperature sensor according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for detecting an operating state of a temperature sensor according to a second embodiment of the present invention;
fig. 3 is a flowchart of a method for detecting an operating state of a temperature sensor according to a third embodiment of the present invention;
fig. 4 is a flowchart of a method for detecting an operating state of a temperature sensor according to a fourth embodiment of the present invention;
fig. 5 is a schematic structural diagram of an induction cooker according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an induction cooker according to a second embodiment of the present invention;
fig. 7 is a schematic structural diagram of an induction cooker according to a third embodiment of the present invention.
Detailed Description
Fig. 1 is a flowchart of a method for detecting an operating state of a temperature sensor according to an embodiment of the present invention, and as shown in fig. 1, the method according to this embodiment may include:
s101, acquiring the temperature of the magnetic plate when the induction cooker is started and the temperature of at least one of the IGBT and the bridge rectifier.
In this embodiment, the temperature of the magnetic plate of the induction cooker is obtained when the induction cooker is turned on, and the temperature of at least one of the IGBT and the bridge rectifier of the induction cooker is obtained when the induction cooker is turned on. For example: when the starting process of the induction cooker needs 8 seconds to be completed, the temperature of the magnetic plate and the temperature of at least one of the IGBT and the bridge rectifier are respectively the temperature of 8 seconds.
S102, when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, setting a thermal identifier for the induction cooker; the first preset condition comprises that the temperature of the magnetic plate is greater than the first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature.
In this embodiment, after the temperature of the magnetic plate and the temperature of at least one of the IGBT and the bridge stack are obtained, it is determined whether the temperature of the magnetic plate meets a first preset condition, and whether the temperature of at least one of the IGBT and the bridge stack meets a second preset condition. The first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature. That is, in this embodiment, it is determined whether the temperature of the magnetic plate is greater than the first preset temperature and less than the second preset temperature, and whether the temperature of at least one of the IBGT and the bridge stack is greater than the third preset temperature. When the temperature of the magnetic plate is greater than the first preset temperature and less than the second preset temperature, and the temperature of at least one of the IGBT and the bridge rectifier is greater than the third preset temperature, it can be determined that the induction cooker is powered off when working at thermal balance or close to thermal balance, and the induction cooker is powered on to work immediately, so that the temperature of the induction cooker before being powered on is considered to be higher. Therefore, in this embodiment, a thermal identifier is provided for the induction cooker, and the thermal identifier is used to indicate that the induction cooker is a heat engine when the induction cooker is started, that is, the induction cooker has the thermal identifier. If the temperature of the magnetic plate is not greater than the first preset temperature or not less than the second preset temperature, or the temperature of at least one of the IGBT and the bridge rectifier is not greater than the third preset temperature, no thermal mark is set for the induction cooker, namely the induction cooker does not have a thermal mark. For example, the first preset condition includes that the temperature of the magnetic plate is greater than 60 degrees and less than 100 degrees. The second preset condition includes that the temperature of at least one of the IGBT and the bridge stack is greater than 40 degrees, but the embodiment is not limited thereto.
S103, setting a working mark for indicating the working state for the temperature sensor according to the thermal mark, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate.
In this embodiment, after the thermal identifier is set for the induction cooker, the operating state of the temperature sensor of the induction cooker is determined according to the set thermal identifier, the temperature change rate of the magnetic plate, and the slope value for comparing the temperature change rate, and an operating identifier is set for the temperature sensor, where the operating identifier is used to indicate the operating state of the temperature sensor. Compared with the prior art, the hot sign of electromagnetism stove has still been referred to this embodiment when setting up the work sign for temperature sensor, can confirm according to the hot sign of electromagnetism stove that the electromagnetism stove starts up under the heat engine state, even temperature sensor sensing magnetic sheet's temperature does not change, also can not think this temperature sensor inefficacy.
The temperature change rate of the magnetic plate may be a temperature change value of the magnetic plate within a preset time, for example, a unit time, for example, 1 second. For example, if the temperature of the magnetic plate acquired at the 30 th second is a1 and the temperature of the magnetic plate acquired at the 40 th second is a2, the temperature change rate is (a2-a 1)/10.
In this embodiment, a thermal identifier is set for the induction cooker by acquiring the temperature of the magnetic plate and the temperature of at least one of the IGBT and the bridge rectifier when the induction cooker is turned on, and when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, and then a working identifier for indicating a working state is set for the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate, and a slope value for comparing the temperature change rate. Because the hot mark set for the induction cooker is referred to when the working mark is set for the temperature sensor, the phenomenon that the temperature sensor fails when the induction cooker is shut down when working at the thermal balance and is started up and working at once is avoided, and the detection accuracy of the state of the temperature sensor is improved.
Fig. 2 is a flowchart of a method for detecting an operating state of a temperature sensor according to a second embodiment of the present invention, and as shown in fig. 2, the method according to this embodiment may include:
s201, acquiring the temperature of the magnetic plate when the induction cooker is started and the temperature of at least one of the IGBT and the bridge rectifier.
S202, when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, setting a thermal identifier for the induction cooker.
The first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature.
In this embodiment, the specific implementation processes of S201 and S202 may refer to the related descriptions in the embodiment shown in fig. 1, and are not described herein again.
S203, acquiring the temperature change rate of the magnetic plate for M times continuously.
And S204, setting a working identifier for the temperature sensor according to the thermal identifier, the temperature change rate obtained for M times continuously and the slope value used for comparing the temperature change rate.
In this embodiment, the temperature change rate of the magnetic plate is obtained M times continuously, where M is an integer greater than or equal to 2, for example: the temperature change rate of the magnetic plate is obtained continuously for a plurality of times within a preset time, i.e., a plurality of temperature change rates are obtained, the preset time being, for example, 5 minutes. And then setting a working identifier for the temperature sensor according to the thermal identifier set in the step S202, the temperature change rate obtained for a plurality of times in succession, and the slope value used for comparing the temperature change rate.
In this embodiment, a thermal identifier is set for the induction cooker by acquiring the temperature of the magnetic plate and the temperature of at least one of the IGBT and the bridge rectifier when the induction cooker is turned on, and when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, and then a working identifier for indicating a working state is set for the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate, and a slope value for comparing the temperature change rate. Because the hot identification set for the induction cooker is referred to when the working identification is set for the temperature sensor, the phenomenon that the temperature sensor fails when the induction cooker is shut down when working at the thermal balance and is started up and operated at once is avoided, and the detection accuracy of the state of the temperature sensor is improved.
According to the scheme, the hot identification set for the induction cooker is referred to when the working identification is set for the temperature sensor, so that the phenomenon that the temperature sensor fails when the induction cooker is shut down when working in thermal balance and is started up and working at once is avoided, and the detection accuracy of the state of the temperature sensor is improved.
Fig. 3 is a flowchart of a method for detecting an operating state of a temperature sensor according to a third embodiment of the present invention, and as shown in fig. 3, the method according to the present embodiment may include:
s301, acquiring the temperature of the magnetic plate when the induction cooker is started and the temperature of at least one of the IGBT and the bridge rectifier.
S302, when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, setting a thermal identifier for the induction cooker.
S303, determining a slope value for comparing the temperature change rate according to the actual working power of the induction cooker.
The slope value in this embodiment is determined according to the actual operating power of the induction cooker, and when the actual operating power of the induction cooker changes, the slope value used for comparing the temperature change rate also changes accordingly, so the slope value in this embodiment is not fixed, and changes according to the operation of the induction cooker.
And S304, acquiring the temperature change rate of the magnetic plate for M times continuously.
In this embodiment, the specific implementation process of S301 to S304 may refer to the related description in the embodiment shown in fig. 2, and is not described herein again.
S305, judging whether the temperature change rate obtained for at least N times is larger than the slope value or not. And N is a positive integer larger than a first preset value. If not, go to step S306, and if so, go to step S307.
S306, judging whether the current temperature of the magnetic plate meets a first preset condition and whether the induction cooker has a hot mark.
In this embodiment, when the temperature change rate obtained less than N times among the temperature change rates obtained M times continuously is greater than the slope value, it is further determined whether the current temperature of the magnetic plate meets a first preset condition, and whether the induction cooker has a hot identifier. If so, go to S307, otherwise, go to S308.
And S307, setting a normal mark for indicating a normal state for the temperature sensor.
In this embodiment, when the temperature change rate obtained at least N times of the temperature change rates obtained M consecutive times is greater than the slope value, it may be determined that the operating state of the temperature sensor is a normal state, and in this embodiment, a normal flag used for indicating the normal state is set for the temperature sensor. Or,
when the current temperature of the magnetic plate meets the first preset condition, and the induction cooker is provided with the thermal identifier, the working state of the temperature sensor can be determined to be a normal state, and the normal identifier used for indicating the normal state is arranged for the temperature sensor.
And S308, setting a failure mark for indicating a failure state for the temperature sensor.
When the current temperature of the magnetic plate does not satisfy the first preset condition and/or the induction cooker does not have the thermal identifier, it may be determined that the operating state of the temperature sensor is a failure state, and in this embodiment, the temperature sensor is provided with a failure identifier for indicating the failure state.
In the embodiment, by the above scheme, because the thermal identifier set for the induction cooker is referred to when the working identifier is set for the temperature sensor, the phenomenon that the temperature sensor fails when the induction cooker is turned off when working in thermal balance and turned on and working at once is avoided.
Fig. 4 is a flowchart of a method for detecting an operating state of a temperature sensor according to a fourth embodiment of the present invention, and as shown in fig. 4, the method according to this embodiment may include:
s401, acquiring the temperature of the magnetic plate when the induction cooker is started and the temperature of at least one of the IGBT and the bridge rectifier.
S402, when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, setting a thermal identifier for the induction cooker.
S403, judging whether the temperature of the magnetic plate is increased and whether the induction cooker is heated. If yes, go to S404, otherwise go to S410.
In this embodiment, when it is determined that the temperature of the magnetic plate is increased and the induction cooker is heating, the present embodiment determines a slope value for comparing the temperature change rate according to the actual operating power of the induction cooker. One possible implementation of determining the slope value according to the actual operating power of the induction cooker includes S404-S407.
S404, obtaining an intermediate value according to the actual working power and a preset slope factor.
In this embodiment, when it is determined that the temperature of the magnetic plate is increased and the induction cooker is heating, an intermediate value is obtained according to the actual working power of the induction cooker and a preset slope factor. For example: the slope factor is preset on the actual working power ratio of the induction cooker, and the obtained value is used as the intermediate value, so that when the actual working power is high, the intermediate value is correspondingly higher, and further the following slope value is relatively higher, so that the misjudgment of the working state of the temperature sensor caused by the over-small slope value can be avoided. The preset slope factor may be determined according to an actual situation of the induction cooker, and the embodiment is not limited.
S405, judging whether the temperature of the magnetic plate meets a third preset condition. If yes, go to step S406, otherwise go to step S407.
Wherein the third preset condition comprises: the temperature of the magnetic plate is less than the fourth preset temperature or greater than the fifth preset temperature.
S406, adjusting the intermediate value to obtain a slope value; the slope value obtained is less than the intermediate value.
In this embodiment, when it is determined that the temperature of the magnetic plate satisfies the third preset condition, that is, the temperature of the magnetic plate is lower than the fourth preset temperature or higher than the fifth preset temperature, the intermediate value obtained in S404 is adjusted, that is, the intermediate value is reduced, the value obtained after the adjustment is a slope value for comparing the temperature change rate, and then S408 is performed. The slope value obtained is less than the intermediate value. Therefore, the phenomenon that the working state of the temperature sensor is misjudged due to the fact that the slope value is high when the temperature is too high or too low can be avoided.
And S407, determining the intermediate value as a slope value.
In this embodiment, when it is determined that the temperature of the magnetic plate does not satisfy the third preset condition, that is, the temperature of the magnetic plate is greater than or equal to the fourth preset temperature and less than or equal to the fifth preset temperature, the intermediate value obtained in S404 is used as a slope value for comparing the temperature change rate, and then S408 is performed.
And S408, acquiring the temperature change rate of the magnetic plate for M times continuously.
And S409, setting a working identifier for the temperature sensor according to the thermal identifier, the temperature change rate obtained for M times continuously and the slope value.
In this embodiment, the specific implementation process of S408 and S409 may refer to the related description in the embodiment shown in fig. 2 or fig. 3, and is not described herein again.
And S410, continuously acquiring the temperature of the magnetic plate for K times.
In this embodiment, when it is determined that the temperature of the magnetic plate is decreased or the induction cooker is not heated, the temperature of the magnetic plate is obtained K times in succession. Then S411 is executed.
S411, judging whether the temperature obtained for K times continuously decreases or not. If yes, go to step S412, otherwise, end.
And S412, setting a normal mark for indicating a normal state for the temperature sensor.
In this embodiment, when it is determined that the temperature obtained for K consecutive times continuously decreases, it may be determined that the operating state of the temperature sensor is a normal state, and in this embodiment, a normal flag for indicating the normal state is set for the temperature sensor.
And when the temperature obtained for K times is determined not to be continuously reduced, ending the process, and not judging the working state of the temperature sensor.
In this embodiment, according to the above-mentioned scheme, since the thermal identifier set for the induction cooker is referred to when the working identifier is set for the temperature sensor in this embodiment, a phenomenon that the temperature sensor fails when the induction cooker is turned off when working in thermal equilibrium and is turned on and working immediately is avoided.
Optionally, on the basis of the foregoing embodiments, after setting the thermal identifier for the induction cooker, and before detecting the operating state of the temperature sensor according to the thermal identifier and the temperature change rate of the magnetic plate, this embodiment further determines the current operating identifier of the temperature sensor, when it is determined that the current operating identifier of the temperature sensor is absent, that is, the operating state of the temperature sensor is temporarily unclear, or when it is determined that the current operating state of the induction cooker is a failure identifier, this embodiment needs to further determine the operating state of the temperature sensor, and then this embodiment detects the operating state of the temperature sensor according to the thermal identifier and the temperature change rate of the magnetic plate. When it is determined that the current working identifier of the temperature sensor is the normal identifier, the present embodiment is ended without further determining the working state of the temperature sensor.
Fig. 5 is a schematic structural diagram of an induction cooker according to an embodiment of the present invention, and as shown in fig. 5, the induction cooker according to the embodiment may include: the device comprises an acquisition module 11, a first setting module 12 and a second setting module 13.
And the obtaining module 11 is used for obtaining the temperature of the magnetic plate when the induction cooker is started and the temperature of at least one of the IGBT and the bridge rectifier.
The first setting module 12 is configured to set a thermal identifier for the induction cooker when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature;
and a second setting module 13, configured to set a working identifier for indicating a working state for the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate, and a slope value for comparing the temperature change rate.
The induction cooker of the present embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 6 is a schematic structural diagram of an induction cooker according to a second embodiment of the present invention, and as shown in fig. 6, on the basis of the embodiment shown in fig. 5, the induction cooker of this embodiment includes a second setting module 13, which includes: an acquisition sub-module 131 and a setting sub-module 132.
The obtaining submodule 131 is used for obtaining the temperature change rate of the magnetic plate for M times continuously; m is an integer greater than or equal to 2;
and the setting submodule 132 is used for setting a working identifier for the temperature sensor according to the thermal identifier, the temperature change rate obtained for M times continuously and the slope value used for comparing the temperature change rate.
Optionally, the setting sub-module 132 is specifically configured to: when the temperature change rate obtained at least N times in the temperature change rates obtained at M times continuously is larger than the slope value, setting a normal mark for indicating a normal state for the temperature sensor; n is a positive integer larger than a first preset value;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is greater than the slope value, the current temperature of the magnetic plate meets the first preset condition, and the induction cooker is provided with the hot mark, a normal mark used for indicating a normal state is arranged for the temperature sensor;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is larger than the slope value; and when the current temperature of the magnetic plate does not meet the first preset condition and/or the induction cooker does not have the thermal mark, setting a failure mark for indicating a failure state for the temperature sensor.
Optionally, the induction cooker of this embodiment further includes: a first determination module 14.
The first determining module 14 is configured to determine that the temperature of the magnetic plate is increased and the induction cooker is heating before the obtaining sub-module 131 obtains the temperature change rate of the magnetic plate M consecutive times.
Optionally, the obtaining module 11 is further configured to obtain the temperature of the magnetic plate for K times continuously after the first determining module 14 determines that the temperature of the magnetic plate is decreased or the induction cooker is not heated;
and the second setting module 13 is configured to set a normal flag for indicating a normal state for the temperature sensor when the temperature obtained for K consecutive times continuously decreases.
Optionally, the induction cooker of this embodiment further includes: a second determination module 15.
And a second determining module 15, configured to determine, before the second setting module 13 sets the working identifier for the temperature sensor, the slope value according to the actual working power of the induction cooker, according to the thermal identifier, the temperature change rate obtained M consecutive times, and the slope value used for comparing the temperature change rate.
Optionally, the second determining module 15 is specifically configured to: obtaining an intermediate value according to the actual working power and a preset slope factor;
when the temperature of the magnetic plate meets a third preset condition, adjusting the intermediate value to obtain the slope value; the obtained slope value is smaller than the intermediate value; the third preset condition includes: the temperature of the magnetic plate is less than a fourth preset temperature or greater than a fifth preset temperature;
and when the temperature of the magnetic plate does not meet the three preset conditions, determining the intermediate value as the slope value.
Optionally, the induction cooker of this embodiment further includes: a third determination module 16.
A third determining module 16, configured to determine that the current working identifier of the temperature sensor is absent or determined that the current working identifier of the temperature sensor is a failure identifier before the second setting sub-module 13 sets the working identifier for indicating the working state for the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate, and the slope value for comparing the temperature change rate.
The induction cooker of the present embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Fig. 7 is a schematic structural diagram of an induction cooker according to a third embodiment of the present invention, and as shown in fig. 7, the induction cooker according to the present embodiment includes: magnetic plate 21, IGBT22, bridge stack 23, first temperature sensor 24, second temperature sensor 25, memory 26, and processor 27; the first temperature sensor 24, the second temperature sensor 25, the memory 26 and the processor 27 are electrically connected.
The first temperature sensor 24 is used for detecting the temperature of the magnetic plate 21 when the induction cooker is started;
the second temperature sensor 25 is used for detecting the temperature of at least one of the IGBT22 and the bridge rectifier 23 when the induction cooker is started;
the memory 26 is used for storing the temperature of the magnetic plate 21 and the temperature of at least one of the IGBT22 and the bridge stack 23;
the processor 27 is configured to set a thermal identifier for the induction cooker when the temperature of the magnetic plate 21 satisfies a first preset condition and the temperature of at least one of the IGBT22 and the bridge rectifier 23 satisfies a second preset condition; the first preset condition comprises that the temperature of the magnetic plate 21 is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT22 and the bridge rectifier 23 is greater than a third preset temperature; and setting a working mark for indicating the working state for the first temperature sensor 24 according to the thermal mark, the temperature change rate of the magnetic plate 21 and the slope value for comparing the temperature change rate.
Optionally, the processor 27 is specifically configured to: acquiring the temperature change rate of the magnetic plate 21 for M times continuously; m is an integer greater than or equal to 2; and setting a working identifier for the first temperature sensor 24 according to the thermal identifier, the temperature change rate obtained M times continuously, and a slope value for comparing the temperature change rate.
Optionally, the processor 27 is specifically configured to: when the temperature change rate obtained at least N times among the temperature change rates obtained M consecutive times is greater than the slope value, setting a normal flag for indicating a normal state for the first temperature sensor 24; n is a positive integer larger than a first preset value;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M consecutive times is greater than the slope value, the current temperature of the magnetic plate 21 meets the first preset condition, and the induction cooker has the hot identifier, a normal identifier for indicating a normal state is set for the first temperature sensor 24;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is larger than the slope value; and when the current temperature of the magnetic plate 21 does not satisfy the first preset condition and/or the induction cooker does not have the thermal mark, setting a failure mark for indicating a failure state for the first temperature sensor 24.
Optionally, the processor 27 is further configured to determine that the temperature of the magnetic plate 21 is increased and the induction cooker is heating before acquiring the temperature change rate of the magnetic plate M times in succession.
Optionally, the processor 27 is further configured to continuously acquire the temperature of the magnetic plate 21 detected by the first temperature sensor 24 for K times if it is determined that the temperature of the magnetic plate 21 is decreased or the induction cooker is not heated; when the temperature of K consecutive acquisitions continues to decrease, a normal flag indicating a normal state is set for the first temperature sensor 24.
Optionally, the processor 27 is further configured to determine the slope value according to the actual working power of the induction cooker before setting the working identifier for the first temperature sensor 24 according to the thermal identifier, the temperature change rate obtained M times in succession, and the slope value used for comparing the temperature change rate.
Optionally, the processor 27 is specifically configured to: obtaining an intermediate value according to the actual working power and a preset slope factor; when the temperature of the magnetic plate 21 meets a third preset condition, adjusting the intermediate value to obtain the slope value; the obtained slope value is smaller than the intermediate value; the third preset condition includes: the temperature of the magnetic plate 21 is less than a fourth preset temperature or greater than a fifth preset temperature; and when the temperature of the magnetic plate 21 does not meet the three preset conditions, determining the intermediate value as the slope value.
Optionally, the processor 27 is further configured to determine, according to the thermal identifier, the temperature change rate of the magnetic plate 21, and a slope value for comparing the temperature change rate, that the current working identifier of the first temperature sensor 24 is absent or determined as a failure identifier before setting the working identifier for indicating the working state for the first temperature sensor 24.
The induction cooker of the present embodiment may be used to implement the technical solutions of the above method embodiments, and the implementation principle and the technical effect are similar, which are not described herein again.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: Read-Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disk, and other various media capable of storing program codes.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (24)
1. A method of detecting an operating condition of a temperature sensor, comprising:
acquiring the temperature of a magnetic plate when the induction cooker is started and the temperature of at least one of an IGBT and a bridge rectifier;
when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition, setting a thermal identifier for the induction cooker; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature;
and setting a working mark for indicating the working state for the temperature sensor according to the thermal mark, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate.
2. The method of claim 1, wherein said setting a flag for indicating an operating state for said temperature sensor based on said thermal flag and a rate of change of temperature of said magnetic plate comprises:
continuously acquiring the temperature change rate of the magnetic plate for M times; m is an integer greater than or equal to 2;
and setting a working identifier for the temperature sensor according to the thermal identifier, the temperature change rate obtained for M times continuously and the slope value used for comparing the temperature change rate.
3. The method of claim 2, wherein the setting of the working flag for the temperature sensor according to the thermal flag, the temperature change rate obtained M consecutive times, and the slope value for comparing the temperature change rate comprises:
when the temperature change rate obtained at least N times in the temperature change rates obtained at M times continuously is larger than the slope value, setting a normal mark for indicating a normal state for the temperature sensor; n is a positive integer larger than a first preset value;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is greater than the slope value, the current temperature of the magnetic plate meets the first preset condition, and the induction cooker is provided with the hot mark, a normal mark used for indicating a normal state is arranged for the temperature sensor;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is larger than the slope value; and when the current temperature of the magnetic plate does not meet the first preset condition and/or the induction cooker does not have the thermal mark, setting a failure mark for indicating a failure state for the temperature sensor.
4. The method of claim 2, wherein prior to obtaining the rate of temperature change of the magnetic plate M consecutive times, further comprising:
determining the temperature rise of the magnetic plate and the heating of the induction cooker.
5. The method of claim 4, wherein if it is determined that the temperature of the magnetic plate is reduced or the induction cooker is not heated, the method further comprises:
continuously acquiring the temperature of the magnetic plate for K times;
and when the temperature obtained for K times continuously decreases, setting a normal mark for indicating a normal state for the temperature sensor.
6. The method according to any one of claims 1-5, wherein before setting the working identifier for the temperature sensor according to the thermal identifier, the temperature change rate obtained M consecutive times, and the slope value for comparing the temperature change rate, the method further comprises:
and determining the slope value according to the actual working power of the induction cooker.
7. The method of claim 6, wherein said determining the slope value based on the actual operating power comprises:
obtaining an intermediate value according to the actual working power and a preset slope factor;
when the temperature of the magnetic plate meets a third preset condition, adjusting the intermediate value to obtain the slope value; the obtained slope value is smaller than the intermediate value; the third preset condition includes: the temperature of the magnetic plate is less than a fourth preset temperature or greater than a fifth preset temperature;
and when the temperature of the magnetic plate does not meet the three preset conditions, determining the intermediate value as the slope value.
8. The method according to any one of claims 1 to 5, wherein before setting the operation flag for indicating the operation state for the temperature sensor according to the thermal flag, the temperature change rate of the magnetic plate, and the slope value for comparing the temperature change rate, further comprising:
and determining that the current working identifier of the temperature sensor is absent or determining that the current working identifier of the first temperature sensor is a failure identifier.
9. An induction cooker, comprising:
the acquisition module is used for acquiring the temperature of the magnetic plate when the induction cooker is started and the temperature of at least one of the IGBT and the bridge rectifier;
the first setting module is used for setting a thermal identifier for the induction cooker when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature;
and the second setting module is used for setting a working identifier for indicating the working state of the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate.
10. The induction cooking oven according to claim 9, wherein said second setting module comprises:
the acquisition submodule is used for acquiring the temperature change rate of the magnetic plate for M times continuously; m is an integer greater than or equal to 2;
and the setting submodule is used for setting a working identifier for the temperature sensor according to the thermal identifier, the temperature change rate obtained for M times continuously and the slope value used for comparing the temperature change rate.
11. The induction hob according to claim 10, characterized in that the setup submodule is specifically configured to: when the temperature change rate obtained at least N times in the temperature change rates obtained at M times continuously is larger than the slope value, setting a normal mark for indicating a normal state for the temperature sensor; n is a positive integer larger than a first preset value;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is greater than the slope value, the current temperature of the magnetic plate meets the first preset condition, and the induction cooker is provided with the hot mark, a normal mark used for indicating a normal state is arranged for the temperature sensor;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is larger than the slope value; and when the current temperature of the magnetic plate does not meet the first preset condition and/or the induction cooker does not have the thermal mark, setting a failure mark for indicating a failure state for the temperature sensor.
12. The induction cooking hob according to claim 10, characterized in, that further comprising: a first determination module;
the first determining module is used for determining the temperature rise of the magnetic plate and the heating of the induction cooker before the first obtaining sub-module obtains the temperature change rate of the magnetic plate for M times continuously.
13. The induction cooking oven according to claim 12,
the obtaining module is further configured to obtain the temperature of the magnetic plate for K consecutive times after the first determining module determines that the temperature of the magnetic plate is reduced or the induction cooker is not heated;
and the second setting module is used for setting a normal mark for indicating a normal state for the temperature sensor when the temperature acquired for K times continuously decreases.
14. The induction cooking hob according to any one of the claims 9-13, characterized in, that it further comprises:
and the second determining module is used for determining the slope value according to the actual working power of the induction cooker before the second setting module sets the working identifier for the temperature sensor according to the thermal identifier, the temperature change rate obtained for M times continuously and the slope value used for comparing the temperature change rate.
15. The induction hob according to claim 14, characterized in that the second determination module is specifically configured to: obtaining an intermediate value according to the actual working power and a preset slope factor;
when the temperature of the magnetic plate meets a third preset condition, adjusting the intermediate value to obtain the slope value; the obtained slope value is smaller than the intermediate value; the third preset condition includes: the temperature of the magnetic plate is less than a fourth preset temperature or greater than a fifth preset temperature;
and when the temperature of the magnetic plate does not meet the three preset conditions, determining the intermediate value as the slope value.
16. The induction cooking hob according to any one of the claims 9-13, characterized in, that it further comprises:
and the third determining module is used for determining that the current working identifier of the temperature sensor is absent or determining that the current working identifier of the first temperature sensor is a failure identifier before the second setting sub-module sets the working identifier for indicating the working state for the temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rates.
17. An induction cooker, comprising: the device comprises a magnetic plate, an IGBT, a bridge rectifier, a first temperature sensor, a second temperature sensor, a memory and a processor; the first temperature sensor, the second temperature sensor, the memory and the processor are electrically connected;
the first temperature sensor is used for detecting the temperature of the magnetic plate when the induction cooker is started;
the second temperature sensor is used for detecting the temperature of at least one of the IGBT and the bridge rectifier when the induction cooker is started;
the memory is used for storing the temperature of the magnetic plate and the temperature of at least one of the IGBT and the bridge stack;
the processor is used for setting a thermal identifier for the induction cooker when the temperature of the magnetic plate meets a first preset condition and the temperature of at least one of the IGBT and the bridge rectifier meets a second preset condition; the first preset condition comprises that the temperature of the magnetic plate is greater than a first preset temperature and less than a second preset temperature, and the second preset condition comprises that the temperature of at least one of the IGBT and the bridge rectifier is greater than a third preset temperature; and setting a working identifier for indicating the working state for the first temperature sensor according to the thermal identifier, the temperature change rate of the magnetic plate and the slope value for comparing the temperature change rate.
18. The induction hob according to claim 17, wherein the processor is specifically configured to: continuously acquiring the temperature change rate of the magnetic plate for M times; m is an integer greater than or equal to 2; and setting a working identifier for the first temperature sensor according to the thermal identifier, the temperature change rate obtained for M times continuously and the slope value used for comparing the temperature change rate.
19. The induction hob according to claim 18, wherein the processor is specifically configured to: when the temperature change rate acquired at least N times in the temperature change rates acquired at M times is greater than the slope value, setting a normal mark for indicating a normal state for the first temperature sensor; n is a positive integer larger than a first preset value;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is greater than the slope value, the current temperature of the magnetic plate meets the first preset condition, and the induction cooker is provided with the hot mark, a normal mark for indicating a normal state is arranged for the first temperature sensor;
when the temperature change rate obtained for less than N times in the temperature change rates obtained for M times is larger than the slope value; and when the current temperature of the magnetic plate does not meet the first preset condition and/or the induction cooker does not have the thermal mark, setting a failure mark for indicating a failure state for the first temperature sensor.
20. The induction cooker of claim 18, wherein the processor is further configured to determine that the temperature of the magnetic plate is increasing and the induction cooker is heating before obtaining the rate of temperature change of the magnetic plate M consecutive times.
21. The induction cooker of claim 20, wherein the processor is further configured to obtain the temperature of the magnetic plate detected by the first temperature sensor K times in succession if it is determined that the temperature of the magnetic plate is decreased or the induction cooker is not heated; and when the temperature obtained for K times continuously decreases, setting a normal mark for indicating a normal state for the first temperature sensor.
22. The induction hob according to any one of the claims 17 to 21, characterized in, that the processor is further configured to determine the slope value according to the actual operating power of the induction hob before setting the operating identification for the first temperature sensor according to the thermal identification, the temperature change rate obtained M consecutive times and the slope value for comparing the temperature change rate.
23. The induction hob according to claim 22, wherein the processor is specifically configured to: obtaining an intermediate value according to the actual working power and a preset slope factor; when the temperature of the magnetic plate meets a third preset condition, adjusting the intermediate value to obtain the slope value; the obtained slope value is smaller than the intermediate value; the third preset condition includes: the temperature of the magnetic plate is less than a fourth preset temperature or greater than a fifth preset temperature; and when the temperature of the magnetic plate does not meet the three preset conditions, determining the intermediate value as the slope value.
24. The induction cooker according to any one of claims 17 to 21, wherein the processor is further configured to determine that the current operation flag of the first temperature sensor is none or that the current operation flag of the first temperature sensor is a failure flag before setting the operation flag indicating the operation state for the first temperature sensor according to the thermal flag, the temperature change rate of the magnetic plate, and the slope value for comparing the temperature change rate.
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| CN201710240734.0A CN108731039A (en) | 2017-04-13 | 2017-04-13 | Method for detecting working state of temperature sensor and induction cooker |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710240734.0A CN108731039A (en) | 2017-04-13 | 2017-04-13 | Method for detecting working state of temperature sensor and induction cooker |
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| US4740664A (en) * | 1987-01-05 | 1988-04-26 | General Electric Company | Temperature limiting arrangement for a glass-ceramic cooktop appliance |
| CN104456654A (en) * | 2013-09-13 | 2015-03-25 | 美的集团股份有限公司 | Induction cooker and control method thereof |
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