Cooking utensil and temperature detection method thereof

Abstract

The invention discloses a cooking utensil and a temperature detection method thereof. The cooking utensil comprises a first thermocouple and a heating coil. According to the temperature detection method, when the cooking utensil is started, a first thermocouple is heated while a heating coil is controlled to work; after the first thermocouple is heated for a first preset time, the actual temperature of the first thermocouple is obtained; when the actual temperature of the first thermocouple is larger than or equal to the preset temperature, the heating coil is controlled to stop working, and heating of the first thermocouple is stopped; the cooking utensil can effectively relieve the temperature of low temperature detection sensitivity of the existing cooking utensil.

Description

Technical Field

[0001] The present application relates to the field of electrical appliance technology, and in particular to a cooking appliance and a temperature detection method thereof. Background Art

[0002] In order to prevent dry-burning, current induction cookers place a thermistor temperature probe at the bottom of the pot. By measuring the temperature of the pot bottom, when it is determined that the temperature of the pot bottom is greater than a certain value, the heating is stopped to achieve the anti-dry-burning function. However, the above temperature measurement method has the problem of low detection sensitivity. Summary of the invention

[0003] The present application provides a cooking appliance and a temperature detection method thereof, which can alleviate the problem of low temperature detection sensitivity of current cooking appliances.

[0004] The present application provides a method for detecting the temperature of a cooking appliance, wherein the cooking appliance comprises a first thermocouple and a heating coil; the temperature detection method comprises:

[0005] When the cooking appliance is started, the heating coil is controlled to operate and heat the first thermocouple;

[0006] After heating the first thermocouple for a first preset time, obtaining an actual temperature of the first thermocouple;

[0007] When the actual temperature of the first thermocouple is greater than or equal to the preset temperature, the heating coil is controlled to stop working and stop heating the first thermocouple.

[0008] In some embodiments, the temperature detection method of the cooking appliance further comprises, after obtaining the actual temperature of the first thermocouple:

[0009] When the actual temperature of the first thermocouple is lower than the preset temperature, the heating coil is controlled to continue to work and continue to heat the first thermocouple.

[0010] In some embodiments, the temperature detection method of the cooking appliance further comprises: after controlling the heating coil to continue to work and continue to heat the first thermocouple:

[0011] After the first thermocouple is heated for a second preset time, obtaining the actual temperature of the first thermocouple;

[0012] When the actual temperature of the first thermocouple is greater than or equal to the preset temperature, the heating coil is controlled to stop working and stop heating the first thermocouple.

[0013] In some embodiments of the temperature detection method for a cooking appliance, the second preset time is shorter than the first preset time.

[0014] In some embodiments, the method for detecting the temperature of a cooking appliance, obtaining the actual temperature of the first thermocouple specifically includes:

[0015] Continuously acquiring the detected temperature value of the first thermocouple for a preset number of times;

[0016] The maximum temperature value among the detected temperature values ​​of the preset number of times is taken as the actual temperature of the first thermocouple.

[0017] In some embodiments, the cooking appliance temperature detection method further comprises: the cooking appliance further comprises a second thermocouple, the first thermocouple is arranged close to the heating coil, and the second thermocouple is arranged away from the heating coil relative to the first thermocouple; the temperature detection method further comprises:

[0018] When the first thermocouple is heated, the second thermocouple is also heated;

[0019] After heating the second thermocouple for a first preset time, obtaining the actual temperature of the second thermocouple;

[0020] When the difference between the actual temperature of the first thermocouple and the actual temperature of the second thermocouple is less than the preset difference, the heating coil is controlled to stop working, and the heating of the first thermocouple and the second thermocouple is stopped.

[0021] In some embodiments, the temperature detection method of the cooking appliance further comprises, after obtaining the actual temperature of the second thermocouple:

[0022] When the actual temperature of the first thermocouple is greater than the actual temperature of the second thermocouple, and the difference between the actual temperature of the first thermocouple and the actual temperature of the second thermocouple is greater than a preset difference, the actual temperature of the first thermocouple is compared with the preset temperature.

[0023] The present application also provides a cooking utensil, the cooking utensil comprising:

[0024] A heating coil, the heating coil is used to heat the appliance to be heated;

[0025] A first thermocouple, the first thermocouple is used to detect the heating temperature of the device to be heated;

[0026] A temperature detection circuit, the temperature detection circuit is used to detect the actual temperature of the first thermocouple;

[0027] A controller is used to execute the temperature detection method of the cooking appliance.

[0028] The present application also provides a cooking utensil, the cooking utensil comprising:

[0029] A heating coil, the heating coil is used to heat the appliance to be heated;

[0030] A first thermocouple, the first thermocouple is used to detect the heating temperature of the device to be heated;

[0031] A second thermocouple;

[0032] A temperature detection circuit, the temperature detection circuit is used to detect the actual temperature of the first thermocouple and the actual temperature of the second thermocouple;

[0033] A controller is used to execute the temperature detection method of the cooking appliance.

[0034] The cooking utensil provided in the embodiments of the present application comprises at least an induction cooker or an electric ceramic cooker.

[0035] The present application provides a cooking utensil and a temperature detection method thereof. The temperature detection method of the cooking utensil in the present application heats a first thermocouple and a heating coil synchronously, which is equivalent to preheating the first thermocouple, thereby shortening the time for temperature detection of the heating utensil, thereby achieving rapid response of temperature detection and improving the sensitivity of temperature detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The technical solution and other beneficial effects of the present application will be made apparent by describing in detail the specific implementation methods of the present application in conjunction with the accompanying drawings.

[0037] Figure 1 A schematic diagram of the three-dimensional structure of the cooking utensil and the instrument to be tested provided in the embodiments of the present application.

[0038] Figure 2 A schematic cross-sectional view of a cooking utensil and a device to be tested provided in an embodiment of the present application.

[0039] Figure 3 A schematic diagram of the three-dimensional structure of a temperature detection component in a cooking utensil provided in an embodiment of the present application.

[0040] Figure 4 A schematic cross-sectional view of a temperature detection assembly in a cooking utensil provided in an embodiment of the present application.

[0041] Figure 5 Provided for the embodiments of this application Figure 4 Partial schematic diagram of point C in the middle.

[0042] Figure 6 This is a flow chart of the first embodiment of the temperature detection method provided in the embodiments of the present application.

[0043] Figure 7 A first temperature rise curve diagram of the device to be heated and the first thermocouple provided in an embodiment of the present application.

[0044] Figure 8 A second temperature rise curve diagram of the device to be heated and the first thermocouple provided in an embodiment of the present application.

[0045] Fig. 9This is a flow chart of the second embodiment of the temperature detection method provided in the embodiments of the present application.

[0046] Fig.10 This is a flow chart of the third embodiment of the temperature detection method provided in the embodiments of the present application.

[0047] Fig.11 This is a flow chart of the fourth embodiment of the temperature detection method provided in the embodiments of the present application.

[0048] Fig.12 This is a flow chart of the fourth embodiment of the temperature detection method provided in the embodiments of the present application.

[0049] Figure numerals: 11, base; 20, appliance to be heated; 12, temperature detection component; 13, heating coil; 121, first thermocouple; 122, second thermocouple. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0051] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. The features specified as "first" and "second" may explicitly or implicitly include one or more features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0052] See also Figure 1 and Figure 2 This embodiment provides a method for detecting the temperature of a cooking appliance, and the cooking appliance may be an induction cooker or an electric ceramic cooker. The cooking appliance includes a base 11, a temperature detection component 12, and a heating coil. The temperature detection component 12 and the heating coil are both arranged inside the base 11, and the temperature detection component 12 is arranged near the center of the base 11.

[0053] Please also read Figure 3 , Figure 4 and Figure 5The temperature detection component 12 includes a first thermocouple 121. The first thermocouple 121 and the heating coil are arranged inside the base 11. The upper surface of the base 11 is used to place the to-be-heated appliance 20. The heating coil is arranged on the side of the base 11 close to the to-be-heated appliance 20. When the cooking appliance is working, the heating coil is electrically heated to heat the to-be-heated appliance 20 placed on the base 11. The first thermocouple 121 is arranged close to the side of the base 11 where the to-be-heated appliance 20 is placed to detect the heating temperature of the to-be-heated appliance 20, to prevent the cooking appliance from being dry-burned and causing the temperature to be too high, thereby improving the safety of the cooking appliance.

[0054] See also Figure 6 Specifically, the temperature detection method of the cooking utensil in the present application includes:

[0055] 100. When the cooking appliance is started, the heating coil is controlled to operate and heat the first thermocouple;

[0056] 200. After heating the first thermocouple for a first preset time, obtaining an actual temperature of the first thermocouple;

[0057] 300. When the actual temperature of the first thermocouple is greater than or equal to the preset temperature, the heating coil is controlled to stop working and the heating of the first thermocouple is stopped.

[0058] Please also read Figure 7 When the cooking device is started, the heating coil is electrically heated. During this process, the temperature of the heating device 20 rises very quickly, for example, it rises to more than 200° C. within a few seconds. Figure 7 As shown in the curve B in FIG. 1 , the curve B is a temperature rise curve of the device to be heated 20. There is thermal resistance between the device to be heated 20 and the first thermocouple 121. It takes a period of time for the temperature of the first thermocouple 121 and the device to be heated 20 to reach equilibrium. Figure 7 As shown in the curve A in FIG. 1 , the curve A is a temperature rise curve of the first thermocouple 121. The temperature of the device to be heated 20 detected by the first thermocouple 121 is closer to the actual temperature of the device to be heated 20. On the contrary, the first thermocouple 121 cannot respond quickly when detecting the temperature of the device to be heated 20, which affects the temperature detection sensitivity.

[0059] Please also read Figure 8 In the embodiment of the present application, when the cooking appliance is started, the heating coil is controlled to work while the first thermocouple 121 is heated, so that the temperature of the first thermocouple 121 rises synchronously with the temperature of the heating coil. After the first thermocouple 121 is heated for a first preset time, the actual temperature of the first thermocouple 121 is obtained. Since the temperature rise of the first thermocouple 121 is synchronized with the heating coil, Figure 8As shown in the curves A and B in FIG. 1 , curve A is a temperature rise curve of the first thermocouple 121, and curve B is a temperature rise curve of the device to be heated 20. At this time, the actual temperature of the first thermocouple 121 is equivalent to the actual temperature detected of the device to be heated 20. When the actual temperature of the first thermocouple 121 is greater than or equal to the preset temperature, it means that the device to be heated 20 is dry-burned at this time, so the heating coil is controlled to stop working, and the heating of the first thermocouple 121 is stopped, so as to avoid the device to be heated 20 from being damaged due to dry-burning.

[0060] In the embodiment of the present application, the first thermocouple 121 is heated synchronously with the heating coil, which is equivalent to preheating the first thermocouple 121, thereby shortening the time for detecting the temperature of the heater device, thereby improving the sensitivity of temperature detection while achieving rapid response of temperature detection.

[0061] See also Fig. 9 In some embodiments, after step 200, the following further includes: 400, when the actual temperature of the first thermocouple 121 is less than the preset temperature, the heating coil is controlled to continue to work and continue to heat the first thermocouple 121. In this embodiment, after the actual temperature of the first thermocouple 121 is obtained, the actual temperature is compared with the preset temperature; if the actual temperature is less than the preset temperature, it indicates that the cooking appliance is in a normal working state at this time, and the heating coil is controlled to continue to work, and the first thermocouple 121 is continued to be heated to maintain the normal working of the cooking appliance.

[0062] See also Fig.10 In some embodiments, after the cooking appliance is maintained to work normally, in order to ensure the reliability of the cooking appliance, the actual temperature of the first thermocouple 121 is still detected, such as controlling the heating coil to continue working and continue heating the first thermocouple 121, and further comprising:

[0063] 10. After the first thermocouple is heated for a second preset time, obtaining the actual temperature of the first thermocouple;

[0064] 20. When the actual temperature of the first thermocouple is greater than or equal to the preset temperature, the heating coil is controlled to stop working and stop heating the first thermocouple.

[0065] After the first preset time, if the actual temperature of the first thermocouple 121 is lower than the preset temperature, the actual temperature of the first thermocouple 121 is detected again after the second preset time; if the actual temperature of the first thermocouple 121 is greater than or equal to the preset temperature at this time, the heating coil is controlled to stop working and the heating of the first thermocouple 121 is stopped, thereby improving the reliability of the cooking appliance.

[0066] Among them, the second preset time can be shorter than the first preset time, which is equivalent to detecting the actual temperature of the first thermocouple 121 again at a smaller interval after the first preset time is detected, thereby realizing continuous detection of the cooking appliance and improving the reliability of the cooking appliance.

[0067] See also Fig.11 In some embodiments, obtaining the actual temperature of the first thermocouple 121 specifically includes:

[0068] 30. Continuously obtain the detected temperature value of the first thermocouple for a preset number of times;

[0069] 40. The maximum temperature value among the temperature values ​​detected a preset number of times is used as the actual temperature of the first thermocouple.

[0070] In this embodiment, when obtaining the actual temperature of the first thermocouple 121, first, the detected temperature values ​​of the first thermocouple 121 for a preset number of times can be obtained continuously, such as detecting the detected temperature values ​​of the first thermocouple 121 three times in a row. After that, the three detected temperature values ​​obtained by the three detections are compared, and after the comparison, the largest detected temperature value is used as the actual temperature of the first thermal resistor component this time. In this embodiment, multiple detections are performed to improve the accuracy of obtaining the actual temperature.

[0071] Please also read Figure 4 , Figure 5 and 12 In some embodiments, the cooking utensil further includes a second thermocouple 122, the first thermocouple 121 is arranged close to the side of the base 11 where the device 20 to be heated is placed, and the heating coil is arranged close to the side of the base 11 where the device 20 to be heated is placed, which is equivalent to the first thermocouple 121 being arranged close to the heating coil. In the embodiment of the present application, the second thermocouple 122 is arranged relatively far away from the heating coil compared to the first thermocouple 121. In the embodiment of the present application, the temperature detection method further includes:

[0072] 50. When heating the first thermocouple, the second thermocouple is also heated;

[0073] 60. After heating the second thermocouple for a first preset time, obtaining an actual temperature of the second thermocouple;

[0074] 70. When the difference between the actual temperature of the first thermocouple and the actual temperature of the second thermocouple is less than a preset difference, the heating coil is controlled to stop working and stop heating the first thermocouple and the second thermocouple.

[0075] In this embodiment, the first thermocouple 121 and the second thermocouple 122 are heated simultaneously in the cooking utensil. After the second thermocouple 122 is heated for the first preset time, the actual temperatures of the first thermocouple 121 and the second thermocouple 122 are obtained simultaneously. When the heating coil works normally and the first thermocouple 121 and the second thermocouple 122 are both heated, the temperature of the first thermocouple 121 close to the heating coil side is higher than that of the second thermocouple 122. On the contrary, after the first preset time, the actual temperature of the first thermocouple 121 and the actual temperature of the second thermocouple 122 are compared. When the difference between the actual temperature of the first thermocouple 121 and the actual temperature of the second thermocouple 122 is less than the preset difference, it indicates that the temperature values ​​of the first thermocouple 121 and the second thermocouple 122 are similar at this time, which can indirectly indicate that only the first thermocouple 121 and the second thermocouple 122 are heated simultaneously, and the heating coil is not involved in the work, and the heating coil may be abnormal. Therefore, the heating coil is controlled to stop working, and the heating of the first thermocouple 121 and the second thermocouple 122 is stopped, and the cooking appliance is troubleshooted.

[0076] After the first preset time, when the actual temperature of the first thermocouple 121 is greater than the actual temperature of the second thermocouple 122, and the difference between the actual temperature of the first thermocouple 121 and the actual temperature of the second thermocouple 122 is greater than the preset difference, it indicates that the heating coil is being heated while the first thermocouple 121 and the second thermocouple 122 are being heated, which indirectly indicates that the heating coil is in a normal working state. Therefore, the actual temperature of the first thermocouple 121 is compared with the preset temperature to further determine whether the appliance 20 to be heated may be in a dry-burning state.

[0077] In this embodiment, two thermocouples are provided, wherein one thermocouple is used to detect the temperature of the appliance to be heated 20, and the other thermocouple is used to form a comparison with the thermocouple. By detecting the temperature of the other thermocouple, it is indirectly determined whether the heating coil is abnormal, thereby realizing the fault prediction of the cooking appliance and improving the reliability of the cooking appliance.

[0078] The embodiment of the present application also provides a cooking utensil, which includes a base, a heating coil, a first thermocouple, a temperature detection circuit and a controller. The first thermocouple is integrated with a heating plate, which is used to heat the first thermal resistor component; the first thermocouple is used to detect the heating temperature of the appliance to be heated; the temperature detection circuit is used to detect the actual temperature of the first thermocouple; and the controller executes the above-mentioned temperature detection method of the cooking utensil according to the actual temperature provided by the temperature detection circuit. Since the temperature detection method is described in detail above, it will not be repeated here.

[0079] In this embodiment, a heating plate is provided in the cooking appliance to preheat the first thermocouple, thereby reducing the difference between the temperature detected by the first thermocouple and the actual temperature of the base, thereby shortening the detection time and achieving the purpose of rapid response. At the same time, the detection error caused by the thermal resistance between the base and the thermocouple is avoided, thereby improving the accuracy of temperature detection.

[0080] The embodiment of the present application also provides a cooking utensil, which includes a base, a heating coil, a first thermocouple, a second thermocouple, a temperature detection circuit and a controller. The first thermocouple and the second thermocouple are both integrated with a heating plate, and the first thermocouple and the second thermocouple are heated by the heating plate; the first thermocouple is used to detect the heating temperature of the appliance to be heated; the temperature detection circuit is used to detect the actual temperature of the first thermocouple and the actual temperature of the second thermocouple; and the controller executes the above-mentioned temperature detection method of the cooking utensil according to the actual temperature provided by the temperature detection circuit. Since the temperature detection method is described in detail above, it will not be described here.

[0081] In this embodiment, two thermocouples are arranged in the cooking appliance, wherein one thermocouple is used to detect the temperature of the base in the cooking appliance, and the other thermocouple is used to form a comparison with the thermocouple. By detecting the temperature of the other thermocouple, it is indirectly determined whether the heating coil has an abnormality, thereby realizing the fault prediction of the cooking appliance and improving the reliability of the cooking appliance.

[0082] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0083] The temperature detection method of the cooking appliance provided in the embodiment of the present application is introduced in detail above. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A method for detecting the temperature of a cooking appliance, characterized in that: The cooking appliance comprises a first thermocouple and a heating coil; the temperature detection method comprises: When the cooking appliance is started, controlling the heating coil to operate while heating the first thermocouple; After heating the first thermocouple for a first preset time, obtaining an actual temperature of the first thermocouple; When the actual temperature of the first thermocouple is greater than or equal to the preset temperature, the heating coil is controlled to stop working and stop heating the first thermocouple.

2. The method for detecting the temperature of a cooking appliance according to claim 1, characterized in that: After obtaining the actual temperature of the first thermocouple, the method further includes: When the actual temperature of the first thermocouple is lower than the preset temperature, the heating coil is controlled to continue to work and continue to heat the first thermocouple.

3. The method for detecting the temperature of a cooking appliance according to claim 2, characterized in that: After controlling the heating coil to continue to work and continue to heat the first thermocouple, the method further includes: After the first thermocouple is heated for the second preset time, obtaining the actual temperature of the first thermocouple; When the actual temperature of the first thermocouple is greater than or equal to the preset temperature, the heating coil is controlled to stop working and the heating of the first thermocouple is stopped.

4. The method for detecting the temperature of a cooking appliance according to claim 3, characterized in that: The second preset time is shorter than the first preset time.

5. The method for detecting the temperature of a cooking appliance according to claim 1 or 3, characterized in that: The obtaining of the actual temperature of the first thermocouple specifically includes: Continuously acquiring the detected temperature value of the first thermocouple for a preset number of times; The maximum temperature value among the detected temperature values ​​of the preset number of times is used as the actual temperature of the first thermocouple.

6. The method for detecting the temperature of a cooking appliance according to claim 1, characterized in that: The cooking appliance further includes a second thermocouple, wherein the first thermocouple is disposed close to the heating coil, and the second thermocouple is disposed away from the heating coil relative to the first thermocouple; and the temperature detection method further includes: When heating the first thermocouple, the second thermocouple is also heated; After heating the second thermocouple for a first preset time, obtaining an actual temperature of the second thermocouple; When the difference between the actual temperature of the first thermocouple and the actual temperature of the second thermocouple is less than a preset difference, the heating coil is controlled to stop working, and the heating of the first thermocouple and the second thermocouple is stopped.

7. The method for detecting the temperature of a cooking appliance according to claim 6, characterized in that: After obtaining the actual temperature of the second thermocouple, the method further includes: When the actual temperature of the first thermocouple is greater than the actual temperature of the second thermocouple, and the difference between the actual temperature of the first thermocouple and the actual temperature of the second thermocouple is greater than a preset difference, the actual temperature of the first thermocouple is compared with the preset temperature.

8. A cooking utensil, characterized in that: The cooking appliance comprises: A heating coil, wherein the heating coil is used to heat the device to be heated; a first thermocouple, wherein the first thermocouple is used to detect a heating temperature of the device to be heated; A temperature detection circuit, wherein the temperature detection circuit is used to detect the actual temperature of the first thermocouple; A controller, wherein the controller is used to execute the temperature detection method for a cooking appliance according to any one of claims 1 to 7.

9. A cooking utensil, characterized in that: The cooking appliance comprises: A heating coil, wherein the heating coil is used to heat the device to be heated; a first thermocouple, wherein the first thermocouple is used to detect a heating temperature of the device to be heated; A second thermocouple; A temperature detection circuit, wherein the temperature detection circuit is used to detect an actual temperature of the first thermocouple and an actual temperature of the second thermocouple; A controller, wherein the controller is used to execute the temperature detection method for a cooking appliance according to any one of claims 1 to 7.

10. The cooking appliance according to claim 9, characterized in that The cooking utensil at least comprises an induction cooker or an electric ceramic cooker.

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