CN109724119B - Household appliance heating appliance capable of avoiding failure of misjudgment protection function - Google Patents
Household appliance heating appliance capable of avoiding failure of misjudgment protection function Download PDFInfo
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- CN109724119B CN109724119B CN201811617511.2A CN201811617511A CN109724119B CN 109724119 B CN109724119 B CN 109724119B CN 201811617511 A CN201811617511 A CN 201811617511A CN 109724119 B CN109724119 B CN 109724119B
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Abstract
The invention provides a household appliance heating appliance capable of avoiding misjudgment of failure of a protection function, which is characterized in that in the working process, whether a first real-time temperature value detected by a temperature sensor after a first preset time reaches a preset rising degree is judged by the heating appliance, if the first real-time temperature value does not reach the preset rising degree, a main controller does not immediately judge the fault of the temperature sensor, but firstly controls a heating device to stop heating temporarily, the temperature of a heated part is gradually reduced after the heating device stops heating temporarily, at the moment, the main controller judges whether a second real-time temperature value detected by the temperature sensor after a second preset time reaches the preset falling degree, if the second real-time temperature value reaches the preset falling degree, the temperature sensor is judged to be normal, and if the temperature falling value is smaller than a second preset value, the main controller judges the fault of the temperature sensor, therefore, the misjudgment of the normal temperature sensor as a fault is avoided, and the failure of the misjudgment protection function can be avoided.
Description
Technical Field
The invention relates to the technical field of household electrical appliances, in particular to a household electrical appliance heating appliance capable of avoiding failure of misjudgment protection function.
Background
Household electrical heating appliances (for example IH heating appliances on gas-electric integrated cookers) are mostly provided with a protection function, which in particular: when the heating appliance works, the real-time temperature value of the heated element is detected by the temperature sensor, and if the real-time temperature value exceeds a safety threshold value, heating is stopped, so that accidents caused by overhigh temperature of the heated element are prevented. However, the temperature sensor may fail after long-term use, and if the temperature sensor fails, the real-time temperature value of the heated member cannot be accurately detected, thereby causing failure of the protection function.
At present, a heating appliance is generally provided with a judging mechanism for judging whether a temperature sensor fails: after the heating device works for a certain time, if the temperature rise value detected by the temperature sensor is greater than a certain preset value, for example, after the heating device works for six minutes, if the temperature rise value is greater than 50 ℃, the temperature sensor is judged to be normal; if the temperature rise value detected by the temperature sensor is smaller than a preset value, for example, after the heating appliance works for six minutes, if the temperature rise value is smaller than 50 ℃, the temperature sensor is judged to be in fault, namely, the protection function of the heating appliance is judged to be invalid, at the moment, the heating appliance stops heating, so that the heating appliance is prevented from continuing to work under the condition that the protection function of the heating appliance is invalid, and when the temperature of the heated element exceeds a safety threshold, the heated element continues to be heated, so that the temperature of the heated element is too high.
The above-mentioned judgment mechanism has a defect, for example, when the environmental temperature is too low, or the heating device heats the frozen object, the real-time temperature of the heated object may not rise to a certain temperature within a certain time, at this time, even if the temperature sensor is normal, the real-time temperature detected by the temperature sensor may not rise to a certain temperature within a certain time, that is, the temperature rise value may be lower than a preset value, thereby causing the heating device to misjudge that the normal temperature sensor is a fault, that is, misjudge that the protection function of the heating device is invalid, at this time, the heating device stops heating and cannot automatically recover, the user can only restart the heating device to recover heating, and the user can perform unnecessary maintenance on the normal heating device, and therefore, the heating device brings great trouble to the user if misjudges that the protection function of the heating device is invalid.
Disclosure of Invention
The invention aims to provide a heating appliance, which can avoid misjudgment of faults of a temperature sensor, namely, can avoid failure of the protection function of misjudgment.
In order to solve the above technical problems, the present invention provides a household electrical appliance heating appliance capable of avoiding erroneous judgment of failure of protection function, comprising a main controller, a heating device and a temperature sensor, wherein the main controller is respectively connected to the heating device and the temperature sensor, the temperature sensor is used for detecting a real-time temperature value of a heated member, the main controller comprises a memory and a processor, wherein the memory stores a computer program, and the computer program when executed by the processor can implement the following steps:
in the process that a heating device heats a heated piece, acquiring a real-time temperature value detected by a temperature sensor, judging whether a first real-time temperature value detected by the temperature sensor after a first preset time reaches a preset rising degree, and controlling the heating device to temporarily stop heating if the first real-time temperature value does not reach the preset rising degree; and continuously acquiring the real-time temperature value detected by the temperature sensor, judging whether the second real-time temperature value detected by the temperature sensor after the second preset time reaches a preset reduction degree, and if the second real-time temperature value reaches the preset reduction degree, judging that the temperature sensor is normal.
Preferably, the determining whether the first real-time temperature value detected by the temperature sensor after the first preset time reaches the preset increase degree specifically includes: according to the first real-time temperature value and the temperature value detected by the temperature sensor before the heating device heats the heated member, the temperature rise value of the heated member after the first preset time is calculated, then the temperature rise value is compared with a first preset value, and if the temperature rise value is smaller than the first preset value, it is judged that the first real-time temperature value does not reach the preset rise degree.
Preferably, the determining whether the second real-time temperature value detected by the temperature sensor after the second preset time reaches the preset reduction degree specifically includes: and calculating a temperature drop value of the heated member after a second preset time according to the first real-time temperature value and the second real-time temperature value, then comparing the temperature drop value with a second preset value, and if the temperature drop value is greater than the second preset value, judging that the second real-time temperature value reaches a preset drop degree.
Preferably, if the first real-time temperature value reaches a preset rising degree, the temperature sensor is judged to be normal.
Preferably, if the temperature sensor is judged to be normal, the heating device is controlled to keep heating.
Preferably, after the heating device temporarily stops heating, if the temperature sensor is determined to be normal, the heating device is controlled to resume heating.
Preferably, if the second real-time temperature value does not reach a preset reduction degree, the fault of the temperature sensor is judged.
Preferably, if it is judged that the temperature sensor is out of order, the heating device is controlled to keep stopping heating.
Preferably, the temperature sensor monitoring system further comprises an alarm device connected with the main controller, and the main controller controls the alarm device to give an alarm if the main controller judges that the temperature sensor fails.
Preferably, the first preset time is equal to the second preset time, and the first preset value is greater than the second preset value.
The invention has the following beneficial effects: in the working process of the heating appliance, whether a first real-time temperature value detected by a temperature sensor after a first preset time reaches a preset rising degree is judged, if the first real-time temperature value does not reach the preset rising degree, the temperature sensor possibly fails, and the real-time temperature of a heated element cannot reach the preset rising degree due to the fact that the environment temperature is too low or a frozen object is heated, so that the main controller does not immediately judge the temperature sensor fails, and controls a heating device to stop heating temporarily; after the heating device stops heating temporarily, the temperature of the heated member can be gradually reduced, at the moment, the main controller judges whether the second real-time temperature value detected by the temperature sensor after the second preset time reaches the preset reduction degree or not, and if the second real-time temperature value reaches the preset reduction degree, the temperature sensor is judged to be normal, so that the condition that the normal temperature sensor is judged to be a fault by mistake is avoided, and the condition that the misjudgment protection function is invalid can be avoided.
Drawings
Fig. 1 is a block diagram of a circuit configuration of a household appliance heating appliance capable of preventing erroneous judgment of a failure of a protection function;
fig. 2 is a schematic view of the working process of the household appliance heating device capable of avoiding the failure of the misjudgment protection function.
Description of reference numerals: 1-a main controller; 2-a heating device; 3-a temperature sensor; 4-alarm device.
Detailed Description
A block diagram of a circuit configuration of a household appliance heating appliance (for example, an IH heating appliance on a gas-electric integrated cooker) of the present embodiment is shown in fig. 1, the heating appliance includes a main controller 1, a heating device 2, a temperature sensor 3, and an alarm device 4, and the main controller 1 is connected to the heating device 2, the temperature sensor 3, and the alarm device 4, respectively.
The heating appliance is provided with an on-off key (not shown in the figure), after a user presses the on-off key to start the heating appliance, the main controller 1 controls the heating device 2 to heat a heated element placed on the heating appliance, at the moment, the main controller 1 controls the temperature sensor 3 to start detecting a real-time temperature value of the heated element (assuming that the initial temperature of the heated element is 25 ℃), and the temperature sensor 3 feeds the detected real-time temperature value back to the main controller 1. The method comprises the following steps that a first preset value (usually preset to 50 ℃) is preset in a main controller 1, the main controller 1 controls a heating device 2 to heat a heated part and then starts timing, the real-time temperature value of the heated part can be gradually increased along with the increase of heating time, the main controller 1 calculates the temperature increase value of the heated part after the first preset time (for example, six minutes) according to the acquired real-time temperature value, and then the temperature increase value is compared with the first preset value (50 ℃): if the real-time temperature value of the heated member detected by the temperature sensor 3 after six minutes is greater than 75 ℃, namely the temperature rise value of the heated member is greater than a first preset value (50 ℃), the main controller 1 judges that the temperature sensor 3 is normal and controls the heating device 2 to continue to heat the heated member; if the real-time temperature value of the heated member detected by the temperature sensor 3 after six minutes is less than 75 deg.c, that is, the temperature increase value of the heated member is less than the first preset value (50 deg.c), the main controller 1 controls the heating device 2 to temporarily stop heating.
The main controller 1 is also preset with a second preset value (usually preset to 30 ℃), after the main controller 1 controls the heating device 2 to stop heating temporarily, the temperature of the heated material can drop gradually, at the moment, the main controller 1 continues to control the temperature sensor 3 to detect the real-time temperature value of the heated material, the temperature sensor 3 continues to feed back the detected real-time temperature value to the main controller 1, at the moment, the main controller 1 continues to time, after a second preset time (for example, six minutes), the main controller 1 compares the real-time temperature value acquired at the moment with the real-time temperature value when the heating is stopped temporarily, the temperature drop value of the heated material after the heating is stopped temporarily is calculated, and then the temperature drop value is compared with the second preset value (30 ℃): if the temperature drop value is greater than a second preset value (30 ℃), which means that the temperature sensor 3 can normally detect the temperature value change of the heated member, the main controller 1 judges that the temperature sensor 3 is normal, and then controls the heating device 2 to recover heating; if the temperature drop value is less than the second preset value (30 ℃), which means that the temperature sensor 3 cannot normally detect the temperature value change of the heated member, the main controller 1 judges that the temperature sensor 3 has a fault, controls the heating device 2 to keep a heating stop state, and controls the alarm device 4 to give a fault alarm. In this embodiment, the alarm device 4 is a digital display screen, and the fault alarm of the heating appliance is implemented by displaying a fault code on the digital display screen.
Generally, the main controller 1 controls the heating device 2 to heat the heated member at a temperature rising speed greater than a temperature falling speed at which the heated member is naturally cooled, so that if the first preset time and the second preset time are set to be the same, the first preset value T1 is set to be greater than the second preset value T2, for example, the first preset time and the second preset time are set to be six minutes, the first preset value is set to be 50 ℃, and the second preset value is set to be 30 ℃.
Claims (10)
1. A household appliance heating appliance capable of avoiding misjudgment of failure of a protection function, comprising a main controller, a heating device and a temperature sensor, wherein the main controller is respectively connected with the heating device and the temperature sensor, the temperature sensor is used for detecting a real-time temperature value of a heated member, the main controller comprises a memory and a processor, the memory stores a computer program, and the computer program is characterized in that when being executed by the processor, the following steps can be realized:
in the process that a heating device heats a heated piece, acquiring a real-time temperature value detected by a temperature sensor, judging whether a first real-time temperature value detected by the temperature sensor after a first preset time reaches a preset rising degree, and controlling the heating device to temporarily stop heating if the first real-time temperature value does not reach the preset rising degree; and continuously acquiring the real-time temperature value detected by the temperature sensor, judging whether the second real-time temperature value detected by the temperature sensor after the second preset time reaches a preset reduction degree, and if the second real-time temperature value reaches the preset reduction degree, judging that the temperature sensor is normal.
2. The household appliance heating appliance capable of avoiding misjudgment of the failure of the protection function according to claim 1, wherein the determining whether the first real-time temperature value detected by the temperature sensor after the first preset time reaches the preset rising degree specifically comprises: according to the first real-time temperature value and the temperature value detected by the temperature sensor before the heating device heats the heated member, the temperature rise value of the heated member after the first preset time is calculated, then the temperature rise value is compared with a first preset value, and if the temperature rise value is smaller than the first preset value, it is judged that the first real-time temperature value does not reach the preset rise degree.
3. The household appliance heating appliance capable of avoiding misjudgment of the failure of the protection function according to claim 1 or 2, wherein the determining whether the second real-time temperature value detected by the temperature sensor after the second preset time reaches the preset reduction degree specifically comprises: and calculating a temperature drop value of the heated member after a second preset time according to the first real-time temperature value and the second real-time temperature value, then comparing the temperature drop value with a second preset value, and if the temperature drop value is greater than the second preset value, judging that the second real-time temperature value reaches a preset drop degree.
4. A household appliance heating appliance capable of avoiding misjudgment and protection failure as claimed in claim 1, wherein: and if the first real-time temperature value reaches the preset rising degree, judging that the temperature sensor is normal.
5. The household appliance heating appliance capable of avoiding misjudgment of the failure of the protection function according to claim 4, wherein: and if the temperature sensor is judged to be normal, controlling the heating device to keep heating.
6. A household appliance heating appliance capable of avoiding misjudgment and protection failure as claimed in claim 1, wherein: and after the heating device stops heating temporarily, if the temperature sensor is judged to be normal, controlling the heating device to recover heating.
7. A household appliance heating appliance capable of avoiding misjudgment and protection failure as claimed in claim 1, wherein: and if the second real-time temperature value does not reach the preset reduction degree, judging that the temperature sensor has a fault.
8. The household appliance heating appliance capable of avoiding misjudgment of the failure of the protection function according to claim 7, wherein: and if the temperature sensor is judged to be in fault, controlling the heating device to keep stopping heating.
9. An electric heating appliance as claimed in claim 7 or 8, wherein: the temperature sensor is characterized by further comprising an alarm device connected with the main controller, and if the main controller judges that the temperature sensor has a fault, the alarm device is controlled to give an alarm.
10. A household appliance heating appliance capable of avoiding misjudgment and protection failure as claimed in claim 1, wherein: the first preset time is equal to the second preset time, and the first preset value is larger than the second preset value.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811617511.2A CN109724119B (en) | 2018-12-28 | 2018-12-28 | Household appliance heating appliance capable of avoiding failure of misjudgment protection function |
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| CN201811617511.2A CN109724119B (en) | 2018-12-28 | 2018-12-28 | Household appliance heating appliance capable of avoiding failure of misjudgment protection function |
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| CN109724119B true CN109724119B (en) | 2020-06-12 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113124428B (en) * | 2019-12-30 | 2023-03-14 | 浙江绍兴苏泊尔生活电器有限公司 | Temperature sensor detection method and device and cooking utensil |
| CN113812854B (en) * | 2020-06-19 | 2023-05-02 | 九阳股份有限公司 | Heating control method for cooking utensil and cooking utensil |
| CN112067164B (en) * | 2020-09-14 | 2022-07-15 | 华帝股份有限公司 | Failure judgment method for temperature sensor of evaporator |
| CN114747928A (en) * | 2021-01-11 | 2022-07-15 | 浙江苏泊尔家电制造有限公司 | Control method of cooking appliance, cooking appliance and computer storage medium |
| CN113741587A (en) * | 2021-09-15 | 2021-12-03 | 珠海格力电器股份有限公司 | Temperature sensor failure detection method, device, equipment and medium for temperature control system |
| CN114000317A (en) * | 2021-11-16 | 2022-02-01 | Tcl家用电器（合肥）有限公司 | Control method of washing equipment and washing equipment |
| CN115493357A (en) * | 2022-10-28 | 2022-12-20 | 长虹美菱股份有限公司 | Facial mask heating device and control method |
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| CN107692812A (en) * | 2017-07-14 | 2018-02-16 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of cooking appliance |
| JP2018063100A (en) * | 2016-10-14 | 2018-04-19 | リンナイ株式会社 | Hot air heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| NL1041116B1 (en) * | 2014-12-19 | 2016-10-11 | Hieronymus Schalkwijk Msc Frank | Device and method for monitoring of a kitchen stove. |
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| CN107449144A (en) * | 2016-05-31 | 2017-12-08 | 金仁镐 | Electrode boiler control device and electrode boiler control method |
| JP2018063100A (en) * | 2016-10-14 | 2018-04-19 | リンナイ株式会社 | Hot air heater |
| CN107692812A (en) * | 2017-07-14 | 2018-02-16 | 浙江绍兴苏泊尔生活电器有限公司 | Control method of cooking appliance |
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