CN214841008U - Furnace surface temperature sensor detection device and induction cooker - Google Patents
Furnace surface temperature sensor detection device and induction cooker Download PDFInfo
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- CN214841008U CN214841008U CN202120365949.7U CN202120365949U CN214841008U CN 214841008 U CN214841008 U CN 214841008U CN 202120365949 U CN202120365949 U CN 202120365949U CN 214841008 U CN214841008 U CN 214841008U
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Abstract
The utility model provides a furnace surface temperature sensor detection device and an induction cooker, which relate to the technical field of kitchen appliances and comprise a temperature acquisition module, a first temperature monitoring module, a second temperature monitoring module, a temperature comparison module, a power regulation module and a main control module; the temperature acquisition module is used for being connected with the furnace surface temperature sensor and acquiring a temperature value detected by the furnace surface temperature sensor; the first temperature monitoring module and the second temperature monitoring module are respectively connected with the temperature acquisition module; the first temperature monitoring module is used for monitoring the variation of the temperature value in a first preset time period; the second temperature monitoring module is used for monitoring the variation of the temperature value in a second preset time period; the temperature comparison module is connected with the temperature acquisition module and used for comparing the temperature value with the temperature threshold value. The failure detection of the furnace surface temperature sensor under the condition of the full temperature section can be realized.
Description
Technical Field
The utility model belongs to the technical field of the kitchen appliance technique and specifically relates to a stove face temperature sensor detection device and electromagnetism stove are related to.
Background
Electromagnetic cookers have been introduced into households as a result of a new generation of kitchen revolution. Compared with the traditional gas stove, the gas stove has the advantages of high efficiency, energy conservation, safety, environmental protection and the like.
The electromagnetism stove needs utilize stove face temperature sensor to transmit temperature signal to control circuit at the heating process to measure and control stove face temperature, in order to prevent the electromagnetism stove overheated, thereby guarantee the security.
In the prior art, when an induction cooker is started up and normally heated, a furnace surface temperature sensor is detected in real time at a temperature below a certain temperature (generally 50 ℃), and if the temperature detected by the furnace surface temperature sensor does not change after heating for a period of time, the furnace surface temperature sensor is judged to be invalid.
However, the detection method still has some problems, if the temperature corresponding to the failure parameter of the furnace surface temperature sensor is above 50 ℃ (such as 80 ℃), the temperature information transmitted to the control circuit is outside the detected temperature range, so that whether the furnace surface temperature sensor fails or not can not be detected, the furnace surface temperature sensor fails and corresponding over-temperature protection is started, and the failure detection accuracy of the furnace surface temperature sensor is low; if the temperature range of detection is enlarged (for example, the detection is changed to be below 70 ℃ for real-time detection), when the temperature is stable (for example, the low-power heating or the temperature setting function of an electromagnetic range and the like), the false alarm condition is easy to occur. In conclusion, the accuracy of detecting the failure of the furnace surface temperature sensor is not high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a furnace face temperature sensor detection device to solve the not high technical problem of furnace face temperature sensor inefficacy detection accuracy among the prior art.
The utility model provides a furnace surface temperature sensor detection device, which comprises a temperature acquisition module, a first temperature monitoring module, a second temperature monitoring module, a temperature comparison module, a power regulation module and a main control module;
the temperature acquisition module is used for being connected with the furnace surface temperature sensor and acquiring a temperature value detected by the furnace surface temperature sensor;
the first temperature monitoring module and the second temperature monitoring module are respectively connected with the temperature acquisition module; the first temperature monitoring module is used for monitoring the variation of the temperature value in a first preset time period; the second temperature monitoring module is used for monitoring the variation of the temperature value in a second preset time period;
the temperature comparison module is connected with the temperature acquisition module and is used for comparing the temperature value with the temperature threshold value;
the power adjusting module is used for being connected with a heating device of the stove and used for adjusting the heating power of the stove;
the first temperature monitoring module, the second temperature monitoring module, the temperature comparison module and the power regulation module are respectively connected with the main control module.
Furthermore, the furnace surface temperature sensor detection device also comprises a power acquisition module and a gear judgment module which are connected with each other;
the power acquisition module is used for being connected with a heating device of a stove and used for acquiring the heating power value of the stove;
the gear judging module is used for comparing the heating power value of the stove with a preset power value; the gear judging module is connected with the main control module.
Further, when the variation of the temperature value in the first preset time period is less than or equal to the first preset variation and the temperature value is less than the temperature threshold, the furnace surface temperature sensor is in a failure state.
Further, when the temperature value is greater than the temperature threshold value and the variation of the temperature value in a second preset time period is less than or equal to a second preset variation, the furnace surface temperature sensor is in a failure state.
Further, the first preset variation and the second preset variation are both 0.
Further, when the heating power value of the furnace is greater than the preset power value, the first preset time period is T1; when the heating power value of the furnace is smaller than the preset power value, the first preset time period is T2; the T1 is 5 minutes to 7 minutes; the T2 is 10 minutes to 12 minutes.
Further, when the ambient temperature of the oven is 25 ℃, the heating power value of the oven is less than the preset power value, and the minimum stable temperature can be reached when the oven heats T2.
Further, the second preset time period is 30 seconds to 60 seconds.
An object of the utility model is to provide an electromagnetism stove, including stove face temperature sensor and the utility model provides a stove face temperature sensor detection device.
Further, the furnace surface temperature sensor is a thermistor type temperature sensor or a thermocouple type temperature sensor.
The utility model provides a furnace surface temperature sensor detection device, when the variation of temperature value in the first preset time quantum is less than or equal to the first preset variation, if at the temperature value less than the temperature threshold value, the master control module can judge that furnace surface temperature sensor is inefficacy, can detect whether furnace surface temperature sensor is inefficacy in real time; if the temperature value is greater than the temperature threshold value, when the furnace surface temperature sensor fails, the resistance value range of the furnace surface temperature sensor is reduced, so that the maximum temperature which can be detected by the furnace surface temperature sensor is reduced, and when the actual temperature is greater than the maximum temperature which can be detected by the furnace surface temperature sensor, the resistance value of the temperature sensor is unchanged, so that the temperature value transmitted to the furnace surface temperature sensor detection device is always the maximum temperature which can be detected by the temperature sensor, and the actual temperature is far greater than the maximum temperature which can be detected by the temperature sensor; therefore, when the heating power is reduced, the actual temperature is reduced, if the furnace surface temperature sensor fails, the reduction of the temperature cannot be detected, and the temperature value transmitted to the furnace surface temperature sensor detection device is still the maximum temperature which can be detected by the temperature sensor; therefore, after the temperature value exceeds the temperature threshold value, the heating power is reduced through the power adjusting module, and whether the furnace surface temperature sensor fails or not can be judged by monitoring the variation of the temperature value in the second preset time period, so that the failure detection of the furnace surface temperature sensor under the condition of the full-temperature section can be realized, and the condition of error report when the temperature value reaches the stable state can be avoided, so that the accuracy of the failure detection of the furnace surface temperature sensor is improved. In addition, the heating power value of the furnace is received in real time, and the heating power value is compared with a preset power value; when the heating power value is larger than the preset power value, judging that the furnace is in a first gear; when the heating power value is smaller than the preset power value, judging that the furnace is in a second gear; according to different gears, when the stove is in a first gear, a first preset time period is T1; when the stove is in the second gear, the first preset time period is T2; t1 < T2; the first preset time of the high-power state is shorter, and the first preset time of the low-power state is longer, so that the furnace can reach stable temperature during low-power heating, and error reporting is prevented; the method can detect the invalidity as soon as possible during high-power heating, and prevent error reporting from being untimely.
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 embodiments or the technical solutions in 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 for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a furnace surface temperature sensor detection device provided by an embodiment of the present invention.
Icon: 1-a main control module; 2-a temperature acquisition module; 3-a furnace surface temperature sensor; 4-a first temperature monitoring module; 5-temperature comparison module; 6-a second temperature monitoring module; 7-gear judgment module; 8-power obtaining module.
Detailed Description
The technical solution of the present invention will be described in detail and initially with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a stove face temperature sensor detection device and electromagnetism stove, it is right to give a plurality of embodiments below the utility model provides a stove face temperature sensor detection device and electromagnetism stove carry out detailed description.
As shown in fig. 1, the furnace surface temperature sensor detection device provided in this embodiment includes a temperature acquisition module 2, a first temperature monitoring module 4, a second temperature monitoring module 6, a temperature comparison module 5, a power adjustment module, and a main control module 1; the temperature acquisition module 2 is used for being connected with the furnace surface temperature sensor 3, and the temperature acquisition module 2 is used for acquiring a temperature value detected by the furnace surface temperature sensor 3; the first temperature monitoring module 4 and the second temperature monitoring module 6 are respectively connected with the temperature acquisition module 2; the first temperature monitoring module 4 is used for monitoring the variation of the temperature value in a first preset time period; the second temperature monitoring module 6 is used for monitoring the variation of the temperature value in a second preset time period; the temperature comparison module 5 is connected with the temperature acquisition module 2, and the temperature comparison module 5 is used for comparing the temperature value with the temperature threshold value; the power adjusting module is used for being connected with a heating device of the stove and adjusting the heating power of the stove; the first temperature monitoring module 4, the second temperature monitoring module 6, the temperature comparison module 5 and the power regulation module are respectively connected with the main control module 1.
Specifically, the first temperature monitoring module 4 is connected with the temperature obtaining module 2, the first temperature monitoring module 4 can receive a temperature value detected by the furnace surface temperature sensor 3, and the first temperature monitoring module 4 is used for monitoring the variation of the temperature value in a first preset time period; when the variation of the temperature value in the first preset time period is smaller than or equal to the first preset variation, the first temperature monitoring module 4 can send a comparison instruction to the main control module 1; the main control module 1 sends the comparison instruction to the temperature comparison module 5, and the temperature comparison module 5 can compare the temperature value with the temperature threshold value according to the comparison instruction; when the temperature value is smaller than the temperature threshold value, the main control module 1 judges that the furnace surface temperature sensor 3 is invalid; when the temperature value is greater than the temperature threshold value, the main control module 1 can send an adjusting instruction and a temperature monitoring instruction; the power adjusting module reduces the heating power of the stove according to the adjusting instruction; the second temperature monitoring module 6 monitors the variation of the temperature value in a second preset time period according to the temperature monitoring instruction; after the heating power of the furnace is reduced, when the variation of the temperature value in the second preset time period is less than or equal to the first preset variation, the main control module 1 judges that the furnace surface temperature sensor 3 is invalid.
The first preset variation and the second preset variation may be specific values (e.g., 0, 0.1, or 0.2), or may be a preset deviation range (e.g., ± 0.1 ℃, ± 0.2 ℃, or ± 0.3 ℃). Preferably, the first preset variation and the second preset variation are both 0, and the detection precision is high.
When the temperature value is smaller than the temperature threshold value, whether the furnace surface temperature sensor 3 fails or not can be detected in real time, when the temperature value is larger than the temperature threshold value, whether the furnace surface temperature sensor 3 fails or not is detected by reducing the heating power of the furnace and monitoring the variation of the temperature value in a second preset time period, the failure detection of the furnace surface temperature sensor 3 under the condition of a full-temperature section can be realized, and the accuracy of the failure detection of the furnace surface temperature sensor 3 is improved.
Specifically, after the user starts, the stove starts to heat, when the temperature value received by the first temperature monitoring module 4 in the first preset time period is continuously unchanged or the variation is within the preset deviation range, the main control module 1 sends a comparison instruction, the temperature comparison module 5 compares the temperature value at the moment with the temperature threshold (K1) according to the comparison instruction, and if the temperature value is smaller than the temperature threshold (K1), the main control module 1 judges that the furnace surface temperature sensor 3 is out of work.
Wherein, a temperature threshold value can be preset in the main control module 1.
If the temperature value is greater than the temperature threshold value (K1), the main control module 1 can send an adjusting instruction, the power adjusting module reduces the heating power of the stove according to the adjusting instruction, and the main control module 1 also sends a temperature monitoring instruction; the second temperature monitoring module 6 monitors the variation of the temperature value within a second preset time period (T3) according to the temperature monitoring instruction, and if the temperature value is continuously unchanged or the variation is within a preset deviation range, the furnace surface temperature sensor 3 is invalid; if the temperature value changes or the variation is not in the preset deviation range, the furnace surface temperature sensor 3 is normal.
It should be noted that the preset deviation range may be ± a%, or ± b ℃, when the furnace surface temperature sensor 3 fails, the resistance range of the furnace surface temperature sensor may become small, which results in the decrease of the maximum temperature that can be detected, and when the actual temperature is greater than the maximum temperature that can be detected by the furnace surface temperature sensor 3, the resistance of the furnace surface temperature sensor 3 is not changed, which results in the temperature value transmitted to the furnace surface temperature sensor detection device being always the maximum temperature that can be detected by the furnace surface temperature sensor 3, and the actual temperature may be much greater than this value. Therefore, when the heating power is reduced, the actual temperature of the system is reduced, and if the furnace surface temperature sensor 3 fails, the temperature reduction cannot be detected, and the temperature value transmitted to the furnace surface temperature sensor detection device is still the maximum temperature that can be detected by the furnace surface temperature sensor 3.
Further, the furnace surface temperature sensor detection device also comprises a power acquisition module 8 and a gear judgment module 7 which are connected with each other; the power obtaining module 8 is used for connecting with a heating device of the stove, and the power obtaining module 8 is used for obtaining a heating power value of the stove; the gear judging module 7 is used for comparing the heating power value of the stove with a preset power value; the gear judging module 7 is connected with the main control module 1.
When the heating power value of the stove is greater than the preset power value, the gear judgment module 7 can judge that the stove is in a first gear, and the main control module 1 sets a first preset time period as T1; when the heating power value of the stove is smaller than the preset power value, the gear judgment module 7 can judge that the stove is in the second gear, and the main control module 1 sets a first preset time period as T2; t1 < T2.
Specifically, after the user starts the oven, the oven is started to heat, the power obtaining module 8 receives the heating power value of the oven in real time, and the gear determining module 7 compares the heating power value with the preset power value (P0). When the heating power value is larger than the preset power value, the gear judgment module 7 judges that the furnace is in a first gear; when the heating power value is smaller than the preset power value, the gear judgment module 7 judges that the furnace is in the second gear.
The value of P0 may be the middle value of heating power of all gears, or the heating gears may be classified (e.g. in case of 10 gears, 1-5 gears are defined as the first gear, and 6-10 gears are defined as the second gear).
According to different gears, when the stove is in a first gear, a first preset time period is T1; when the stove is in the second gear, the first preset time period is T2, and T1 < T2.
The high-power heating time is short, the low-power heating time is long, and the aim is to ensure that the furnace reaches stable temperature during low-power heating and prevent error reporting; the method can detect the invalidity as soon as possible during high-power heating, and prevent error reporting from being untimely.
Wherein, T1 can be 5 minutes to 7 minutes, and T2 can be 10 minutes to 12 minutes.
Further, when the variation of the temperature value in the first preset time period is smaller than or equal to the first preset variation and the temperature value is smaller than the temperature threshold, the furnace surface temperature sensor 3 is in a failure state.
Further, when the temperature value is greater than the temperature threshold and the variation of the temperature value in a second preset time period is less than or equal to a second preset variation, the furnace surface temperature sensor 3 is in a failure state.
Further, the temperature threshold is the lowest stable temperature that the oven can reach when heating T2 with the second gear power at normal room temperature (25 ℃), and 50 ℃ is generally preferred.
Further, the furnace surface temperature sensor detection device also comprises a power adjusting module; the power adjusting module is used for being connected with a heating device of the stove and can adjust the heating power of the stove.
After the furnace surface temperature sensor 3 is judged to be invalid, the power adjusting module controls the furnace to stop heating so as to prevent the furnace from overheating, and therefore the safety of the furnace is improved.
Further, after the temperature value is larger than the temperature threshold value and the furnace surface temperature sensor 3 is judged to be normal, the power adjusting module increases the heating power of the furnace to the initial heating power.
The initial heating power is the original heating power before the heating power is reduced.
After the furnace surface temperature sensor 3 is judged to be normal, the heating power is restored to the initial heating power, and the normal work of the induction cooker can be ensured.
Further, when the power adjusting module reduces the heating power of the furnace, the reduction amplitude of the heating power is 30% -70%. The second preset time period (T3) is 30 seconds to 60 seconds.
If the reduction amplitude of the heating power is larger, the selection of T3 can be correspondingly reduced; when the reduction range of the heating power is small, the selection of T3 can be correspondingly increased, and the temperature value can be slightly reduced to be out of the second preset variation range.
The heating power of the stove is not reduced to 0 as far as possible, and if the heating power is reduced to 0, the illusion of equipment failure is easily caused to a user, and the user experience is influenced.
Furthermore, the heating power can also be reduced by a fixed value, as long as a slight temperature drop is ensured, which can be detected.
In this embodiment, the furnace surface temperature sensor 3 may be a thermistor type or a thermocouple type.
The furnace surface temperature sensor detection device provided by the embodiment can detect whether the furnace surface temperature sensor 3 fails in real time when the temperature value is smaller than the temperature threshold value, and can detect whether the furnace surface temperature sensor 3 fails by reducing the heating power of the furnace and monitoring the variation of the temperature value in the second preset time period when the temperature value is larger than the temperature threshold value, so that the furnace surface temperature sensor 3 fails to detect under the full-temperature section condition, and the accuracy of the failure detection of the furnace surface temperature sensor 3 is improved.
The induction cooker provided by the embodiment comprises a furnace surface temperature sensor 3 and the furnace surface temperature sensor detection device provided by the embodiment. When the temperature value is smaller than the temperature threshold value, whether the furnace surface temperature sensor 3 fails or not can be detected in real time, when the temperature value is larger than the temperature threshold value, whether the furnace surface temperature sensor 3 fails or not is detected by reducing the heating power of the furnace and monitoring the variation of the temperature value in a second preset time period, the failure detection of the furnace surface temperature sensor 3 under the condition of a full-temperature section can be realized, and the accuracy of the failure detection of the furnace surface temperature sensor 3 is improved.
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; although the present invention has been described in detail with reference to the foregoing embodiments, it should 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; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The detection device for the furnace surface temperature sensor is characterized by comprising a temperature acquisition module (2), a first temperature monitoring module (4), a second temperature monitoring module (6), a temperature comparison module (5), a power regulation module and a main control module (1);
the temperature acquisition module (2) is used for being connected with the furnace surface temperature sensor (3), and the temperature acquisition module (2) is used for acquiring a temperature value detected by the furnace surface temperature sensor (3);
the first temperature monitoring module (4) and the second temperature monitoring module (6) are respectively connected with the temperature acquisition module (2); the first temperature monitoring module (4) is used for monitoring the variation of the temperature value in a first preset time period; the second temperature monitoring module (6) is used for monitoring the variation of the temperature value in a second preset time period;
the temperature comparison module (5) is connected with the temperature acquisition module (2), and the temperature comparison module (5) is used for comparing the temperature value with the temperature threshold value;
the power adjusting module is used for being connected with a heating device of the stove and used for adjusting the heating power of the stove;
the first temperature monitoring module (4), the second temperature monitoring module (6), the temperature comparison module (5) and the power regulation module are respectively connected with the main control module (1).
2. The furnace surface temperature sensor detection device according to claim 1, further comprising a power acquisition module (8) and a gear judgment module (7) connected to each other;
the power acquisition module (8) is used for being connected with a heating device of a stove, and the power acquisition module (8) is used for acquiring the heating power value of the stove;
the gear judging module (7) is used for comparing the heating power value of the stove with a preset power value; the gear judging module (7) is connected with the main control module (1).
3. The furnace surface temperature sensor detection device according to claim 1, wherein the furnace surface temperature sensor (3) is in a failure state when the variation of the temperature value in the first preset time period is less than or equal to the first preset variation and the temperature value is less than the temperature threshold value.
4. The furnace surface temperature sensor detection device according to claim 3, wherein when the temperature value is greater than the temperature threshold value and the variation of the temperature value in the second preset time period is less than or equal to the second preset variation, the furnace surface temperature sensor (3) is in a failure state.
5. The furnace surface temperature sensor detection apparatus of claim 4, wherein the first predetermined variation and the second predetermined variation are both 0.
6. The furnace surface temperature sensor detection device according to claim 2,
when the heating power value of the furnace is greater than the preset power value, the first preset time period is T1; when the heating power value of the furnace is smaller than the preset power value, the first preset time period is T2; the T1 is 5 minutes to 7 minutes; the T2 is 10 minutes to 12 minutes.
7. The furnace surface temperature sensor detection device according to claim 6, wherein the temperature threshold is the lowest stable temperature which can be reached by the furnace heating time T2 when the heating power value of the furnace is less than the preset power value when the ambient temperature of the furnace is 25 ℃.
8. The furnace face temperature sensor detection apparatus of any one of claims 1-7, wherein the second preset time period is 30-60 seconds.
9. An induction hob, characterized in, that it comprises a hob surface temperature sensor (3) and a hob surface temperature sensor detection device according to any one of the claims 1-8.
10. The induction hob according to claim 9, characterized in, that the hob face temperature sensor (3) is a thermistor type temperature sensor or a thermocouple type temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365949.7U CN214841008U (en) | 2021-02-09 | 2021-02-09 | Furnace surface temperature sensor detection device and induction cooker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365949.7U CN214841008U (en) | 2021-02-09 | 2021-02-09 | Furnace surface temperature sensor detection device and induction cooker |
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| Publication Number | Publication Date |
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| CN214841008U true CN214841008U (en) | 2021-11-23 |
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| CN202120365949.7U Active CN214841008U (en) | 2021-02-09 | 2021-02-09 | Furnace surface temperature sensor detection device and induction cooker |
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| CN (1) | CN214841008U (en) |
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- 2021-02-09 CN CN202120365949.7U patent/CN214841008U/en active Active
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