Temperature control methods, electronic devices, readable storage media, and cooking equipment

Abstract

This invention relates to the field of kitchen appliance technology, specifically providing a temperature control method, electronic device, readable storage medium, and cooking equipment, aiming to solve the problem of inaccurate temperature control caused by the increasing age of cooking equipment. To this end, the temperature control method of this invention includes: a heating phase, heating based on a preset heating mode; overshoot fitting self-learning based on a preset standard full-load stop point to obtain overshoot fitting coefficients; obtaining the full-load stop point of the heating phase based on a target temperature and the overshoot fitting coefficients; and stopping heating in response to the temperature reaching the full-load stop point. By performing overshoot fitting self-learning based on a preset standard full-load stop point during the heating phase to obtain overshoot fitting coefficients, and obtaining the full-load stop point of the heating phase based on the target temperature and the overshoot fitting coefficients, precise control of the heating phase is achieved, solving the problem of inaccurate temperature control caused by the increasing age of cooking equipment.

Description

Technical Field

[0001] This invention relates to the field of kitchen appliance technology, specifically providing a temperature control method, an electronic device, a readable storage medium, and a cooking device. Background Technology

[0002] Existing cooking appliances such as ovens and steam ovens typically require preheating before cooking begins. However, the preheating temperature of existing ovens is often uncontrollable. Even if parameters or coefficients are set to control preheating, deviations can occur with age or changes in environmental conditions, causing existing control parameters or coefficients to become ineffective in temperature control, resulting in significant temperature fluctuations within the oven.

[0003] Therefore, how to solve the problem of inaccurate temperature control caused by the increasing use of cooking equipment has become an urgent issue.

[0004] Accordingly, a new temperature control solution is needed in this field to address the aforementioned problems. Summary of the Invention

[0005] To overcome the above-mentioned defects, the present invention is proposed, providing a temperature control method, an electronic device, a readable storage medium, and a cooking device to solve, or at least partially solve, the technical problem of inaccurate temperature control caused by the increasing years of use of cooking devices.

[0006] In a first aspect, the present invention provides a temperature control method applied to a cooking device, comprising:

[0007] During the heating phase, heating is performed based on a preset heating mode;

[0008] Overshoot fitting self-learning is performed based on a preset standard full-open stop point to obtain the overshoot fitting coefficient;

[0009] The full-scale stop point of the heating stage is obtained based on the target temperature and the overshoot fitting coefficient.

[0010] Heating stops when the temperature reaches the full-open stop point.

[0011] In one technical solution of the above temperature control method, the step of performing overshoot fitting self-learning based on a preset standard full-open stop point to obtain overshoot fitting coefficients includes:

[0012] If it is the first time cooking, the overshoot fitting coefficient is obtained based on the preset initial value of the overshoot fitting coefficient; otherwise, the overshoot fitting self-learning is performed based on the full-open stop point, overshoot amount and preset standard full-open stop point of the previous cooking, and the overshoot fitting coefficient is updated.

[0013] In one technical solution of the above temperature control method, the number of preset standard full-opening stop points is at least three; the overshoot fitting self-learning based on the full-opening stop point of the previous cooking, the overshoot amount, and the preset standard full-opening stop points, and updating the overshoot fitting coefficients, includes:

[0014] Obtain the corresponding standard overshoot based on the standard full-open stop point;

[0015] Based on the standard full-open stop point, standard overshoot and desired overshoot, as well as the full-open stop point and overshoot of the previous cooking, linear fitting is performed using the least squares method to obtain updated overshoot fitting coefficients.

[0016] In one technical solution of the above temperature control method, obtaining the full-scale stop point of the heating stage based on the target temperature and the overshoot fitting coefficient includes:

[0017] The desired overshoot amount is obtained based on the heating mode;

[0018] Based on the overshoot fitting coefficient, the target temperature, and the preset desired overshoot amount, the full-open stop point is obtained.

[0019] In one technical solution of the above temperature control method, the preset heating mode includes a rapid heating mode and a non-rapid heating mode, and the step of obtaining the preset desired overshoot based on the heating mode includes:

[0020] If the rapid heating mode is used during the heating phase, the desired overshoot is the preset value m, where m>0;

[0021] If a non-rapid heating mode is used during the heating phase, the desired overshoot is 0.

[0022] In one technical solution of the above temperature control method, after the heating stage is completed, the method further includes:

[0023] The current temperature is controlled based on the PID algorithm.

[0024] In one technical solution of the above temperature control method, the preset heating mode includes a rapid heating mode and a non-rapid heating mode. After the heating stage ends, before adjusting the current temperature based on the PID algorithm, the method further includes: selectively entering a transition stage based on the heating mode of the heating stage.

[0025] If the rapid heating mode is used during the heating phase, then the transition phase begins, during which the heating element is not turned on.

[0026] If a non-rapid heating mode is used during the heating phase, the transition phase will not begin.

[0027] In a second aspect, an electronic device is provided, comprising a processor and a memory, the memory being adapted to store a plurality of program codes, the program codes being adapted to be loaded and executed by the processor to perform the temperature control method described in any of the above-described temperature control methods.

[0028] In a third aspect, a computer-readable storage medium is provided, wherein a plurality of program codes are stored, the program codes being adapted to be loaded and run by a processor to perform the temperature control method described in any of the above-described temperature control methods.

[0029] In a fourth aspect, a cooking device is provided, the cooking device body including a housing and a heating element disposed within the housing, the cooking device including the cooking device body and the aforementioned electronic equipment.

[0030] The present invention comprises one or more of the following technical solutions:

[0031] Beneficial effects:

[0032] In implementing the technical solution of the present invention, overshoot fitting self-learning is performed based on a preset standard full-open stop point during the heating stage to obtain the overshoot fitting coefficient, and the full-open stop point of the heating stage is obtained based on the target temperature and the overshoot fitting coefficient; the heating stage is precisely controlled, which solves the problem of inaccurate temperature control caused by the increasing years of use of cooking equipment. Attached Figure Description

[0033] The disclosure of this invention will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this invention. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0034] Figure 1 This is a flowchart of the main steps of a temperature control method according to an embodiment of the present invention;

[0035] Figure 2 This is a detailed flowchart of the temperature control method according to another embodiment of the present invention;

[0036] Figure 3 This is a main structural block diagram of an electronic device used to perform the temperature control method of the present invention. Detailed Implementation

[0037] Some embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0038] In the description of this invention, "module" and "processor" can include hardware, software, or a combination of both. A module can include hardware circuitry, various suitable sensors, communication ports, memory, and may also include software components, such as program code, or a combination of software and hardware. A processor can be a central processing unit, microprocessor, image processor, digital signal processor, or any other suitable processor. The processor has data and / or signal processing capabilities. The processor can be implemented in software, in hardware, or a combination of both. Non-transitory computer-readable storage media includes any suitable medium capable of storing program code, such as magnetic disks, hard disks, optical disks, flash memory, read-only memory, random access memory, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B, or A and B. The terms "at least one A or B" or "at least one of A and B" have a similar meaning to "A and / or B" and can include only A, only B, or A and B. The singular terms "a" or "this" can also include plural forms.

[0039] This invention provides a temperature control method. (See attached document.) Figure 1 , Figure 1 This is a flowchart of the main steps of a temperature control method according to an embodiment of the present invention.

[0040] In some embodiments, the temperature control method is applied to a cooking appliance. Exemplarily, the cooking appliance may be an oven, a steam oven, a microwave-oven combination appliance, a microwave-steam-oven combination appliance, an integrated stove oven, or other cooking appliances.

[0041] like Figure 1 As shown, the temperature control method in this embodiment of the invention mainly includes the following steps S11-S14.

[0042] Step S11, heating stage, heating is performed based on a preset heating mode.

[0043] The heating mode includes a rapid heating mode and a non-rapid heating mode. If the heating mode is a rapid heating mode, the preset rapid heating element combination is activated for heating. If the heating mode is a non-rapid heating mode, the user-defined heating element combination is activated for heating.

[0044] For example, in one embodiment, the rapid heating element combination is a combination of activating the upper inner heating element, the lower heating element, and the circulating fan; the user-configured heating element combination is a combination of activating the back heating element and the circulating fan. In other embodiments of the present invention, the rapid heating element combination and the user-configured heating element combination can be used in other combinations according to actual needs, and are not limited to the settings in the above embodiments.

[0045] During the heating phase, in order to ensure the efficiency of the preheating of the steam oven, regardless of whether the rapid heating mode or the non-rapid heating mode is used, the heating element is turned on at maximum power with a duty cycle of 1, that is, fully open.

[0046] Step S12: Perform overshoot fitting self-learning based on the preset standard full-open stop point to obtain the overshoot fitting coefficients.

[0047] In one implementation, the step of performing overshoot fitting self-learning based on a preset standard full-open stop point to obtain overshoot fitting coefficients includes:

[0048] If it is the first time cooking, the overshoot fitting coefficient is obtained based on the preset initial value of the overshoot fitting coefficient; otherwise, the overshoot fitting self-learning is performed based on the full-open stop point, overshoot amount and preset standard full-open stop point of the previous cooking, and the overshoot fitting coefficient is updated.

[0049] Furthermore, the number of preset standard full-opening stop points is at least three; the overshoot fitting self-learning based on the full-opening stop point of the previous cooking, the overshoot amount, and the preset standard full-opening stop points, and updating the overshoot fitting coefficients, includes:

[0050] The corresponding standard overshoot is obtained based on the standard full-open stop point.

[0051] For example, the three standard full-open stop points are... The preset temperatures are 100℃, 150℃, and 200℃, respectively.

[0052] The standard full-opening stop point Its corresponding standard overshoot The following relation (1) must be satisfied:

[0053]

[0054] Among them, a os and b os These are the overshoot fitting coefficients updated since the last cooking.

[0055] Based on the above relationship (1), three standard overshoot values ​​are obtained.

[0056] In one embodiment, based on the standard full-open stop point, the standard overshoot, and the full-open stop point and overshoot of the previous cooking, linear fitting is performed using the least squares method to obtain updated overshoot fitting coefficients.

[0057] Least squares method for parameter solving is a common mathematical analysis method capable of fitting complex parameter variables without being affected by the distribution of sampling points. It can seek the best-fit curve and its parameter values ​​based on known data points, and further determine other unknown data points based on the best-fit curve. In this embodiment, the parameter values ​​of the best-fit curve are the overshoot fitting coefficients α. os and b os .

[0058] The least squares method was used for linear fitting based on four sets of data, including three sets of the standard full-open stop points. and standard overshoot The data includes the full-open stop point and overshoot from the previous cooking cycle. After each cooking cycle, the overshoot fitting coefficient 'a' is updated using the least squares method. os and b os This ensures the accuracy of the overshoot fit and coefficients. The above update process is the self-learning of the overshoot fit coefficients.

[0059] For example, the overshoot fitting coefficient a os and b os and standard full-opening stop point It can be stored in EEPROM (Electrically Erasable Programmable Read-Only Memory). In one embodiment, the above data can be stored in float format, which is convenient for storage and occupies little space.

[0060] In another embodiment, the number of preset standard full-open stop points can be more than three. Correspondingly, when performing linear fitting using the least squares method to obtain updated overshoot fitting coefficients, three or more sets of the standard full-open stop points and standard overshoot, as well as the full-open stop points and overshoot from the previous cooking, are also used for linear fitting.

[0061] The full-open stop point and overshoot of the second cooking are the values ​​obtained from the actual measurement in the previous cooking.

[0062] Step S13: Based on the target temperature and the overshoot fitting coefficient, obtain the full-open stop point of the heating stage.

[0063] In one embodiment, obtaining the full-scale stop point of the heating phase based on the target temperature and the overshoot fitting coefficient includes:

[0064] The desired overshoot amount is obtained based on the heating mode;

[0065] Based on the overshoot fitting coefficient, the target temperature, and the preset desired overshoot amount, the full-open stop point is obtained.

[0066] In one embodiment, the preset heating mode includes a rapid heating mode and a non-rapid heating mode, and obtaining the preset desired overshoot based on the heating mode includes:

[0067] If the rapid heating mode is used during the heating phase, the desired overshoot is the preset value m, where m>0;

[0068] If a non-rapid heating mode is used during the heating phase, the desired overshoot is 0.

[0069] For example, in one embodiment, if a rapid heating mode is used during the heating phase, the preset value m is 20°C, i.e., the desired overshoot T is... os =20; If a non-rapid heating mode is used during the heating phase, the desired overshoot T is... os =0. In other embodiments of the present invention, the preset value m can also be set to other reasonable values ​​depending on the specific circumstances. This is because the desired overshoot T is preset in both rapid heating mode and non-rapid heating mode. os All of these have been pre-written into the code and can be directly called when obtaining the full-opening stop point, which can be obtained based on the heating mode.

[0070] Based on the overshoot fitting coefficient, the target temperature, and the preset desired overshoot amount, the full-open stop point is obtained. The detailed derivation process is as follows:

[0071] Let the full-open stop point X, and the overshoot Y simultaneously satisfy the following relationship:

[0072] Y = a × X + b (2)

[0073] Y = T set +T os -X (3)

[0074] Among them, T set T is the target temperature preset by the user. os This is the preset desired overshoot amount.

[0075] By combining equations (2) and (3), the full-open stopping point can be obtained through equation transformation:

[0076]

[0077] As shown in equation (4), based on the overshoot fitting coefficients a and b, the target temperature T set And the preset desired overshoot T os Obtain the fully open stop point X.

[0078] In one embodiment, the overshoot fitting coefficients a and b are the overshoot fitting coefficients updated after the last cooking. os and b os .

[0079] Because the overshoot fitting coefficient is updated based on the data from each cooking session, the full-opening stop point obtained based on the updated overshoot fitting coefficient is also quite accurate, effectively avoiding parameter inaccuracies caused by environmental factors or long usage time, thus enabling the cooking equipment to heat up precisely.

[0080] Step S14: In response to the temperature reaching the full-open stop point, heating is stopped.

[0081] Based on a preset heating mode, the heating element is heated to its maximum power until the temperature inside the chamber reaches the full-capacity stop point, at which point the heating phase ends. Further, in one embodiment, after the heating phase ends, the method further includes:

[0082] The current temperature is controlled based on the PID (Proportional, Integral, Differential) algorithm.

[0083] After the oven preheats, it typically needs to heat continuously for a period of time based on the user-selected cooking program or target temperature. During this period, a PID algorithm is used to control the output power of the heating element by controlling the output coefficients of the proportional, integral, and derivative terms, thus precisely regulating the temperature inside the cooking appliance. Specifically, adjusting the proportional gain Kp, integral gain Ki, and derivative gain Kd allows the control system to automatically and quickly make accurate corrections.

[0084] In one embodiment, the preset heating mode includes a rapid heating mode and a non-rapid heating mode. After the heating phase ends, before adjusting the current temperature based on the PID algorithm, the method further includes: selectively entering a transition phase based on the heating mode of the heating phase.

[0085] If the rapid heating mode is used during the heating phase, then the transition phase begins, during which the heating element is not turned on.

[0086] If a non-rapid heating mode is used during the heating phase, the transition phase will not begin.

[0087] Based on steps S11-S14 above, overshoot fitting self-learning is performed based on a preset standard full-open stop point during the heating stage to obtain overshoot fitting coefficients, and the full-open stop point of the heating stage is obtained based on the target temperature and the overshoot fitting coefficients; precise control of the heating stage is achieved, solving the problem of inaccurate temperature control caused by the increasing years of use of cooking equipment.

[0088] Furthermore, the present invention also provides another embodiment, please refer to [link to embodiment]. Figure 2 .

[0089] Figure 2This is a detailed flowchart of a temperature control method according to another embodiment of the present invention. The method mainly includes the following steps S200-S230.

[0090] Step S200, Initialization Phase. In the initialization phase, parameters that do not need to be saved are initialized.

[0091] Step S210, Heating Stage. The heating element is activated based on the preset heating mode. If the heating mode is a rapid heating mode, the preset rapid heating element combination is activated for heating; if the heating mode is a non-rapid heating mode, the user-defined heating element combination is activated for heating.

[0092] Step S211: Determine whether the temperature inside the chamber has reached the full-open stop point. If yes, proceed to step S212; otherwise, continue to step S210.

[0093] Furthermore, overshoot fitting self-learning is performed based on the preset standard full-open stop point to obtain the overshoot fitting coefficient;

[0094] The full-scale stop point of the heating stage is obtained based on the target temperature and the overshoot fitting coefficient.

[0095] Step S212: Determine whether to use rapid heating mode. If yes, proceed to step S220; otherwise, proceed to step S230. After the heating stage ends, adjust the temperature inside the chamber based on the PID algorithm, without needing to enter the transition stage.

[0096] Step S220, Transition Phase. During the transition phase, the heating element is not turned on so that the temperature inside the chamber quickly approaches the preset target temperature after the heating phase ends.

[0097] Step S221: Determine if the adjustment point has been reached. If yes, the heating stage ends, and step S230 is executed to adjust the temperature inside the chamber based on the PID algorithm; otherwise, return to continue executing step S220.

[0098] The temperature at the adjustment point is determined based on a preset target temperature. For example, the temperature at the adjustment point is the target temperature plus 1°C.

[0099] It should be noted that although the steps in the above embodiments are described in a specific order, those skilled in the art will understand that in order to achieve the effects of the present invention, different steps do not necessarily have to be executed in such an order. They can be executed simultaneously (in parallel) or in other orders, and these variations are all within the scope of protection of the present invention.

[0100] Those skilled in the art will understand that all or part of the processes in the method of the above embodiment of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable storage medium can include any entity or device capable of carrying the computer program code, a medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory, a random access memory, an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc. It should be noted that the content included in the computer-readable storage medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, the computer-readable storage medium does not include electrical carrier signals and telecommunication signals.

[0101] Furthermore, the present invention also provides an electronic device. Please refer to the appendix. Figure 3 , Figure 3 This is a main structural block diagram of an electronic device used to perform the temperature control method of the present invention.

[0102] like Figure 3 As shown, in one embodiment of an electronic device according to the present invention, the electronic device includes a processor 301 and a memory 302. The memory 302 may be configured to store program code 303 for executing the temperature control method of the above-described method embodiments. The processor 301 may be configured to execute the program code 303 in the memory 302. The program code 303 includes, but is not limited to, program code 303 for executing the temperature control method of the above-described method embodiments. For ease of explanation, only the parts related to the embodiments of the present invention are shown. For specific technical details not disclosed, please refer to the method section of the embodiments of the present invention.

[0103] Furthermore, the present invention also provides a computer-readable storage medium. In one embodiment of the computer-readable storage medium according to the present invention, the computer-readable storage medium can be configured to store a program that performs the temperature control method of the above-described method embodiments, the program being loaded and run by a processor to implement the above-described temperature control method. For ease of explanation, only the parts related to the embodiments of the present invention are shown; for specific technical details not disclosed, please refer to the method section of the embodiments of the present invention. The computer-readable storage medium can be a storage device comprising various electronic devices; optionally, in the embodiments of the present invention, the computer-readable storage medium is a non-transitory computer-readable storage medium.

[0104] Furthermore, the present invention also provides a cooking device, the main body of which includes a housing and a heating element disposed within the housing. The cooking device includes the main body and the aforementioned electronic equipment. Exemplarily, the cooking device may be an oven, a steam oven, a microwave-oven combination appliance, a microwave-steam-oven combination appliance, an integrated stove oven, or other cooking appliances.

[0105] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0106] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A temperature control method applied to cooking equipment, characterized in that, include: During the heating phase, heating is performed based on a preset heating mode; Overshoot fitting self-learning is performed based on a preset standard full-open stop point to obtain the overshoot fitting coefficient; The full-scale stop point of the heating stage is obtained based on the target temperature and the overshoot fitting coefficient. Heating stops when the temperature reaches the full-open stop point. The step of performing overshoot fitting self-learning based on a preset standard full-open stop point to obtain overshoot fitting coefficients includes: If it is the first time cooking, the overshoot fitting coefficient is obtained based on the preset initial value of the overshoot fitting coefficient; otherwise, the overshoot fitting self-learning is performed based on the full-open stop point, overshoot amount and preset standard full-open stop point of the previous cooking, and the overshoot fitting coefficient is updated. The step of obtaining the full-scale stop point of the heating stage based on the target temperature and the overshoot fitting coefficient includes: The desired overshoot amount is obtained based on the heating mode; Based on the overshoot fitting coefficient, the target temperature, and the preset desired overshoot amount, the full-open stop point is obtained; The method of obtaining the full-open stop point based on the overshoot fitting coefficient, the target temperature, and the preset desired overshoot amount further includes: As shown in the following equation, based on the overshoot fitting coefficient, the target temperature, and the preset desired overshoot amount, the full-open stop point is obtained: Where a and b are the overshoot fitting coefficients. The target temperature, X is the preset desired overshoot value, and X is the full-open stop point.

2. The temperature control method according to claim 1, characterized in that, The number of preset standard full-opening stop points is at least three; the overshoot fitting self-learning based on the full-opening stop point of the previous cooking, the overshoot amount, and the preset standard full-opening stop points, and updating the overshoot fitting coefficients, includes: Obtain the corresponding standard overshoot based on the standard full-open stop point; Based on the standard full-open stop point, standard overshoot, and the full-open stop point and overshoot of the previous cooking, linear fitting is performed using the least squares method to obtain updated overshoot fitting coefficients.

3. The temperature control method according to claim 1, characterized in that, The preset heating mode includes a rapid heating mode and a non-rapid heating mode. Obtaining the preset desired overshoot based on the heating mode includes: If the rapid heating mode is used during the heating phase, the desired overshoot is the preset value m, where m>0; If a non-rapid heating mode is used during the heating phase, the desired overshoot is 0.

4. The temperature control method according to claim 1, characterized in that, After the heating phase is completed, the method further includes: The current temperature is controlled based on the PID algorithm.

5. The temperature control method according to claim 4, characterized in that, The preset heating mode includes a rapid heating mode and a non-rapid heating mode. After the heating phase ends, before adjusting the current temperature based on the PID algorithm, the method further includes: selectively entering a transition phase based on the heating mode of the heating phase. If the rapid heating mode is used during the heating phase, then the transition phase begins, during which the heating element is not turned on. If a non-rapid heating mode is used during the heating phase, the transition phase will not begin.

6. An electronic device comprising a processor and a memory, the memory being adapted to store a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by the processor to perform the temperature control method according to any one of claims 1 to 5.

7. A computer-readable storage medium storing a plurality of program codes, characterized in that, The program code is adapted to be loaded and run by a processor to perform the temperature control method according to any one of claims 1 to 5.

8. A cooking apparatus, the main body of which includes a housing and a heating element disposed within the housing, characterized in that, The cooking device includes the cooking device body and the electronic device as described in claim 6.

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