Partitioned temperature control method for oven heating device and oven

Abstract

This invention relates to the field of oven technology, specifically disclosing a method for zoned temperature control of oven heating devices and an oven. The method involves obtaining the heating temperatures set by a first heating device and a second heating device; designating the area containing the heating device with the higher set temperature as the main temperature control zone and the area containing the heating device with the lower set temperature as the auxiliary temperature control zone; using corresponding preset mapping relationships, calculating the target temperature compensation value required by the heating devices in the main temperature control zone and the target operating power required by the heating devices in the auxiliary temperature control zone; adjusting the temperature of the heating devices in the main temperature control zone based on the target temperature compensation value; and controlling the temperature of the heating devices in the auxiliary temperature control zone based on the target operating power using a fixed-frequency output. This invention effectively avoids mutual coupling interference between different heating devices during operation, significantly reducing the difficulty of temperature control.

Description

Technical Field

[0001] This invention relates to the field of oven technology, and in particular to a method for zoned temperature control of an oven heating device and an oven. Background Technology

[0002] An oven is a common kitchen appliance that uses built-in upper and lower heating elements to bake food. Currently, most ovens on the market use only a single cavity temperature probe when using the upper and lower heating element baking function, which can only provide uniform compensation heating to the entire cavity. This single-probe temperature control method is prone to uneven and uncontrolled temperature distribution between the upper and lower parts of the oven during cooking, resulting in burnt food on top and undercooked food on the bottom, leading to inconsistent baking quality. Existing solutions use dual probes for feedback control, but when the two probes adjust independently, the heat radiation from the upper and lower heating elements couples, making temperature control even more difficult. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a method for zoned temperature control of an oven heating element and an oven, which effectively avoids mutual coupling interference when different heating elements are working, and significantly reduces the difficulty of temperature control.

[0004] To achieve the above objectives, the present invention provides the following technical solution:

[0005] A method for zoned temperature control of an oven heating element, the method comprising the following steps:

[0006] Obtain the heating temperature set by the first heating device and the heating temperature set by the second heating device;

[0007] By comparing the heating temperature set by the first heating device and the heating temperature set by the second heating device, the main temperature control zone and the auxiliary temperature control zone are determined. The area where the heating device with the higher temperature is located is the main temperature control zone, and the area where the heating device with the lower temperature is located is the auxiliary temperature control zone.

[0008] Based on the heating temperature set by the first heating device and the heating temperature set by the second heating device, the corresponding preset mapping relationship is invoked to calculate the target temperature compensation value required by the heating device in the main temperature control zone and the target working power required by the heating device in the auxiliary temperature control zone.

[0009] The heating device in the main temperature control zone adjusts the temperature based on the target temperature compensation value.

[0010] The heating device in the auxiliary temperature control zone controls the temperature by outputting a fixed frequency based on the target operating power.

[0011] According to some embodiments of the present invention, the preset mapping relationship is formed by collecting operating data from N different temperature points and M different temperature difference points. The preset mapping relationship forms an N×M data grid under the combination of the N temperature points and the M temperature difference points. Each point in the data grid stores the temperature compensation value and fixed operating power at that point.

[0012] According to some embodiments of the present invention, the temperature point is a preset heating temperature point of the first heating device or the second heating device, and the temperature difference point is the difference between the preset heating temperature of the first heating device and the preset heating temperature of the second heating device.

[0013] According to some embodiments of the present invention, the temperature compensation value is the temperature compensation value data obtained by the first heating device at the heating temperature, and the fixed operating power is the fixed operating power data used by the second heating device at the heating temperature; or, the temperature compensation value is the temperature compensation value data obtained by the second heating device at the heating temperature, and the fixed operating power is the fixed operating power data used by the first heating device at the heating temperature.

[0014] According to some embodiments of the present invention, invoking the corresponding preset mapping relationship specifically includes the following steps: the preset mapping relationship is provided in two sets; when the difference between the heating temperature set by the first heating device and the heating temperature set by the second heating device is a positive number, the first set of preset mapping relationships is invoked; when the difference between the heating temperature set by the first heating device and the heating temperature set by the second heating device is a negative number, the second set of preset mapping relationships is invoked; the horizontal coordinate axes of the first set of preset mapping relationships and the second set of preset mapping relationships are the same.

[0015] According to some embodiments of the present invention, invoking the corresponding preset mapping relationship specifically includes the following steps: the N×M data grid is divided into multiple regions based on the positions of points N and M; when the heating temperature set by the first heating device is Tx and the heating temperature set by the second heating device is Ts, the coordinates of the target point R at the preset temperature are obtained by substituting into the corresponding preset mapping relationship, and the region in which the target point R falls within the data grid is determined, and the four corner coordinates Q of the region are invoked. 11 Q 12 Q 21 and Q 22 The system stores temperature compensation data and fixed operating power data, thereby calculating the target temperature compensation value required by the heating device in the main temperature control zone and the target operating power required by the heating device in the auxiliary temperature control zone.

[0016] According to some embodiments of the present invention, calculating the target temperature compensation value required by the heating device in the main temperature control zone and the target operating power required by the heating device in the auxiliary temperature control zone specifically includes:

[0017] After calling the data with the corresponding preset mapping relationship, the normalized coordinate formula and bilinear interpolation formula are substituted into the calculation;

[0018] The formula for the normalized coordinates is as follows:

[0019] x=(x R -x0) / (x1-x0);

[0020] y=(y R -y0) / (y1-y0);

[0021] The bilinear interpolation formula is as follows:

[0022] Tx-set=(1-x)(1-y)*Q 11 (Temperature compensation value) + x(1-y)*Q 21 (Temperature compensation value) + (1-x)y*Q 12 (Temperature compensation value) + xy * Q 22 (Temperature compensation value);

[0023] Ps-set=(1-x)(1-y)*Q 11 (fixed operating power value) + x(1-y)*Q 21 (fixed operating power value) + (1-x)y*Q 12 (fixed operating power value) + xy * Q 22 (Fixed operating power value);

[0024] Wherein, the coordinates of the target point R are (x R ,y R The coordinates of the four corners of the area where the target point R is located are Q. 11 Q 12 Q 21 and Q 22 The coordinates of Q are (x0, y0), (x0, y1), (x1, y0), and (x1, y1). 11 Q 12 Q 21 and Q 22 Each location stores temperature compensation value data and fixed operating power data at the relevant temperature. Tx-set is the target temperature compensation value, and Ps-set is the target operating power.

[0025] According to some embodiments of the present invention, the temperature point is selected from the lowest, middle and maximum values ​​of the heating temperature set by the first heating device or the heating temperature set by the second heating device; the temperature difference point is selected from 0, ΔTmax and the middle value.

[0026] Another aspect of the present invention provides an oven, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the zone temperature control method as described in any of the first aspects above.

[0027] The present invention has at least the following beneficial effects:

[0028] 1. By comparing the set temperatures of the first and second heating devices, the main temperature control zone and the auxiliary temperature control zone of the oven are distinguished. The preset mapping relationship is invoked, and the target temperature compensation value of the main temperature control zone and the target working power of the auxiliary temperature control zone are calculated. This allows the heating device in the main temperature control zone to adjust the temperature based on the target temperature compensation value, while the heating device in the auxiliary temperature control zone adjusts the temperature based on the target working power. This simplifies the originally complex dual-input dual-output dual-temperature field coupling control into a "one-dimensional feedback + one-dimensional constant value" model, achieving precise temperature difference control in different zones and eliminating temperature oscillations caused by mutual interference when the upper and lower heating elements are dynamically adjusted simultaneously.

[0029] 2. Within the preset mapping relationship, technicians have pre-entered the relevant operating data at the temperature based on the oven being operated. The preset mapping relationship transforms the complex nonlinear relationship of the temperature field into tabular data. During operation, the table can be quickly looked up and interpolated to calculate the target temperature compensation value and the target working power, thereby improving the response speed. Attached Figure Description

[0030] Figure 1 This is a first set of preset mapping relationships in one embodiment of the present invention;

[0031] Figure 2 This is a second set of preset mapping relationships according to an embodiment of the present invention;

[0032] Figure 3 This is a schematic flowchart of a zoned temperature control method according to an embodiment of the present invention. Detailed Implementation

[0033] The present invention is provided below with reference to the accompanying drawings to aid in a full understanding of the various embodiments of the invention as defined by the claims and their equivalents. The description includes various specific details to aid understanding, but these details should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the invention.

[0034] In the description of this invention, the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0035] It should be understood that when one element (e.g., the first element) is “connected” to another element (e.g., the second element), the element may be directly connected to the other element, or there may be an intervening element (e.g., the third element) between the element and the other element.

[0036] A first aspect of the present invention provides a method for zoned temperature control of an oven heating device, the method comprising the following steps:

[0037] Obtain the heating temperature set by the first heating device and the heating temperature set by the second heating device;

[0038] Compare the heating temperature set by the first heating device and the heating temperature set by the second heating device to determine the main temperature control zone and the auxiliary temperature control zone. Set the area where the heating device with the higher temperature is located as the main temperature control zone and the area where the heating device with the lower temperature is located as the auxiliary temperature control zone.

[0039] When the user operates the oven, they set the heating temperatures of the first and second heating elements respectively. This zoned temperature control method distinguishes the main and auxiliary temperature control zones of the oven by comparing the temperature values. The heating area where the heating element with the higher heating temperature is located is designated as the main temperature control zone, and the heating area where the heating element with the lower heating temperature is designated as the auxiliary temperature control zone. This facilitates the subsequent calculation of the target temperature compensation value for the main temperature control zone and the target operating power for the auxiliary temperature control zone based on the set temperatures of the first and second heating elements, using a preset mapping relationship. This simplifies the originally complex dual-temperature field coupling control and effectively avoids mutual coupling interference between the two heating elements when adjusting the temperature, forming a "one-dimensional feedback + one-dimensional constant value" model. This makes the temperature difference control between the two zones of the oven controllable, stable, and oscillating, achieving precise temperature difference control between different zones. It fundamentally eliminates the temperature oscillations caused by mutual interference when the heating elements, which are set up vertically, are dynamically adjusted simultaneously.

[0040] Based on the heating temperature set by the first heating device and the heating temperature set by the second heating device, the corresponding preset mapping relationship is invoked to calculate the target temperature compensation value required by the heating device in the main temperature control zone and the target working power required by the heating device in the auxiliary temperature control zone.

[0041] The mapping relationship is formed in advance by technicians who input operating data at relevant temperatures based on the oven model to be operated. This operating data is derived and input by technicians through prior experiments. In this embodiment, the first and second heating devices inside the oven cavity are respectively located at the top and bottom of the oven, forming two heating zones: the upper cavity and the lower cavity. Temperature probes installed in the upper and lower heating devices are used to test and calibrate actual data at different set temperatures, constructing a data mapping table. Relevant data is stored within different or identical mapping relationships for easy retrieval during subsequent calculations. The preset mapping relationship transforms complex nonlinear temperature field relationships into data, allowing the background processing module to quickly look up and interpolate values ​​during runtime, eliminating the need for real-time iterative calculations and improving response speed.

[0042] The heating device in the main temperature control zone adjusts the temperature based on the target temperature compensation value.

[0043] The heating device in the auxiliary temperature control zone outputs a fixed-frequency temperature control based on the target operating power.

[0044] When the oven transitions from the heating phase to the constant temperature phase, the heating element in the main temperature control zone adjusts its temperature based on the target compensation temperature. This adjustment is achieved using either PID control or Bang-Bang control, both existing technologies, and their specific feedback control processes will not be detailed here. Simultaneously, the heating element in the auxiliary temperature control zone outputs a fixed-frequency power based on the target operating power. This fixed target operating power refers to the constant conduction time (duty cycle) of the heating element within a complete PWM cycle. This combination of dynamic and fixed-frequency temperature control effectively avoids mutual coupling interference between different heating elements, significantly reducing the difficulty of temperature control.

[0045] In some embodiments, the preset mapping relationship is formed by collecting operating data from N different temperature points and M different temperature difference points. The preset mapping relationship forms an N×M data grid under the combination of N temperature points and M temperature difference points. Each point in the data grid stores the temperature compensation value and fixed operating power at that point.

[0046] The coupling characteristics of the upper and lower temperature fields inside the oven are nonlinear. By sampling a limited number of operating points, such as N = 3-5 and M = 2-3 in this embodiment, the continuous nonlinear relationship is discretized and stored as a data grid, without the need to establish complex mathematical and physical equations. Each grid point of the data grid simultaneously records multiple independent parameters, including but not limited to the compensation values ​​that the heating devices in different main temperature control zones should achieve, and the fixed operating power or fixed duty cycle that the corresponding auxiliary temperature control zones should adopt. All time-consuming experimental calibration work is completed before production. During operation, only data retrieval and calculation are required, resulting in a very light load on the controller and enabling a high-speed and efficient control cycle.

[0047] Furthermore, the temperature point is the preset heating temperature point of the first heating device or the second heating device, and the temperature difference point is the difference between the preset heating temperature of the first heating device and the preset heating temperature of the second heating device.

[0048] Temperature points and temperature difference points, as two orthogonal independent variables, form a regular N×M rectangular grid, enabling the target point to be quickly located during operation through bilinear interpolation, avoiding control jumps caused by discrete sampling. Temperature points directly correspond to the target temperature of the heating device, while temperature difference points directly reflect the difference in heat demand between the first and second heating devices. The two coordinate axes have clear physical meanings and are independent of each other, facilitating dimensional calibration by experimental personnel without considering additional coupling variables.

[0049] Furthermore, the temperature compensation value is the temperature compensation value data obtained by the first heating device at the heating temperature, and the fixed working power is the fixed working power data used by the second heating device at the heating temperature; or, the temperature compensation value is the temperature compensation value data obtained by the second heating device at the heating temperature, and the fixed working power is the fixed working power data used by the first heating device at the heating temperature.

[0050] Based on the pre-stored mapping relationship, when the first heating device is used as the main temperature control zone, the grid points can store the temperature compensation value measured by the first heating device at the selected heating temperature and the fixed operating power to be used by the second heating device as the auxiliary temperature control zone; or simultaneously store the temperature compensation value measured by the second heating device under the same operating condition and the fixed operating power used by the first heating device. The heating temperature referred to here is the actual measured data at the heating temperature of the temperature point in the mapping relationship. This achieves automatic matching between the data grid and the determination of the main and auxiliary temperature control zones. During operation, there is no need to reorganize the table; the relevant data in the corresponding pre-stored mapping relationship can be directly called. The temperature point taken by the pre-stored mapping relationship can be the preset heating temperature point of the first or second heating device, and is not limited to the heating temperature of the main temperature control zone.

[0051] Furthermore, the corresponding preset mapping relationship is invoked, specifically including the following steps: there are two sets of preset mapping relationships. When the difference between the heating temperature set by the first heating device and the heating temperature set by the second heating device is a positive number, the first set of preset mapping relationships is invoked; when the difference between the heating temperature set by the first heating device and the heating temperature set by the second heating device is a negative number, the second set of preset mapping relationships is invoked; the horizontal coordinate axes of the first set of preset mapping relationships and the second set of preset mapping relationships are the same.

[0052] In this embodiment, the horizontal axis of the N×M data grid formed by the first and second sets of preset mapping relationships is the same, while the vertical axis is formed according to the sign of the temperature difference between the first and second heating devices. When the temperature difference is positive, i.e., the set temperature of the first heating device is higher than that of the second heating device, and the first heating device is the main temperature control zone, the first set of mapping relationships is invoked; when the temperature difference is negative, i.e., the set temperature of the first heating device is lower than that of the second heating device, and the second heating device is the main temperature control zone, the second set of mapping relationships is invoked. The sign of the temperature difference directly reflects the ownership of the main temperature control zone. The corresponding table is automatically determined and invoked through the sign of the temperature difference, without the need for additional logical judgment or user intervention, realizing the integration of main and auxiliary zone identification and table selection. During runtime, only the sign of the temperature difference needs to be calculated to quickly determine which set of tables to invoke, avoiding coordinate transformation or sign processing within the same table, simplifying the software logic and improving execution efficiency.

[0053] like Figure 1 The first set of preset mapping relationships shown, and as follows Figure 2 The horizontal axis of the second set of preset mapping relationships shown represents the preset heating temperature of the second heating device. The vertical axis of the first set of preset mapping relationships represents the positive difference between the preset heating temperature of the first heating device and the preset heating temperature of the second heating device. The vertical axis of the second set of preset mapping relationships represents the negative difference between the preset heating temperature of the first heating device and the preset heating temperature of the second heating device. This method facilitates data retrieval, greatly simplifies the use of mapping relationships, and reduces variables.

[0054] In some embodiments, invoking the corresponding preset mapping relationship specifically includes the following steps: an N×M data grid is divided into multiple regions based on the positions of points N and M; when the heating temperature set by the first heating device is Tx and the heating temperature set by the second heating device is Ts, the coordinates of the target point R at the preset temperature are obtained by substituting into the corresponding preset mapping relationship, and the region where the target point R falls within the data grid is determined. The coordinates of the four corners Q of that region are then invoked. 11 Q 12 Q 21 and Q 22 The system stores temperature compensation data and fixed operating power data, thereby calculating the target temperature compensation value required by the heating device in the main temperature control zone and the target operating power required by the heating device in the auxiliary temperature control zone.

[0055] By dividing the mapping relationship into multiple rectangular grid regions based on N temperature points and M temperature difference points, the finite discrete points calibrated offline can cover the entire continuous temperature-temperature difference plane through region positioning and corner point data retrieval, eliminating the need to experiment with all possible combinations of set temperatures and greatly reducing the calibration workload. Furthermore, since only the four corner points of the region where the target point R is located are used, rather than the entire table, the computational load is limited to a fixed small range.

[0056] Furthermore, the target temperature compensation value required by the heating device in the main temperature control zone and the target operating power required by the heating device in the auxiliary temperature control zone are calculated by substituting the data of the corresponding preset mapping relationship into the normalized coordinate formula and the bilinear interpolation formula.

[0057] The formula for normalized coordinates is as follows:

[0058] x=(x R -x0) / (x1-x0);

[0059] y=(y R -y0) / (y1-y0);

[0060] The bilinear interpolation formula is as follows:

[0061] Tx-set=(1-x)(1-y)*Q 11 (Temperature compensation value) + x(1-y)*Q 21 (Temperature compensation value) + (1-x)y*Q 12 (Temperature compensation value) + xy * Q 22 (Temperature compensation value);

[0062] Ps-set=(1-x)(1-y)*Q 11 (fixed operating power value) + x(1-y)*Q 21 (fixed operating power value) + (1-x)y*Q 12 (fixed operating power value) + xy * Q 22 (Fixed operating power value);

[0063] Wherein, the coordinates of the target point R are (x R ,y R The coordinates of the four corners of the area where the target point R is located are Q. 11 Q 12 Q 21 and Q 22 The coordinates of Q are (x0, y0), (x0, y1), (x1, y0), and (x1, y1). 11 Q 12 Q 21 and Q 22Each location stores temperature compensation value data and fixed operating power data at the relevant temperature. Tx-set is the target temperature compensation value, and Ps-set is the target operating power.

[0064] In the oven of this embodiment, the heating temperature of the first heating device is set to 145°C, and the heating temperature of the second heating device is set to 140°C. The difference between the heating temperatures set for the first and second heating devices is +5°C. The area where the first heating device is located is determined to be the main temperature control zone, and the area where the second heating device is located is determined to be the auxiliary temperature control zone. The first set of preset mapping relationships in this embodiment is as follows: Figure 1 As shown, the horizontal axis represents the temperature value of the second heating device, and the vertical axis represents the positive temperature difference between the heating temperature set by the first heating device and the heating temperature of the second heating device. N is 3, which are 100℃, 175℃, and 250℃ respectively; M is 3, which are 0℃, 10℃, and 20℃ respectively.

[0065] The coordinates of the target point R (x R ,y R = (140, 5), determine the Q in the data grid of the mapping relationship where the target point R falls. 11 Q 12 Q 21 and Q 22 Within the area, the temperature compensation value data and fixed operating power data stored at the four corner points are retrieved, as follows:

[0066] Q 11 The probe compensation value of the first heating device is 98, and the fixed operating power of the second heating device is 5%.

[0067] Q 12 The probe compensation value of the first heating device is 91, and the fixed operating power of the second heating device is 6%.

[0068] Q 21 The compensation value of the probe of the first heating device is 172, and the fixed operating power of the second heating device is 7%.

[0069] Q 22 The compensation value of the probe of the first heating device is 163, and the fixed operating power of the second heating device is 8%.

[0070] Substituting the above data into the normalized coordinate formula yields:

[0071] x = (140 - 100) / (175 - 100) = 0.533

[0072] y = (5-0) / (10-0) = 0.500

[0073] Substituting the above data into the bilinear interpolation formula yields:

[0074] The target temperature compensation value of the first heating device is Tx-set=(1-0.533)(1-0.500)*98+0.533(1-0.500)*172+(1-0.533)0.500*91+0.533*0.500*163=133℃;

[0075] The target operating power of the second heating device is Ps-set=(1-0.533)(1-0.500)*0.05+0.533(1-0.500)*0.07+(1-0.533)0.500*0.06+0.533*0.500*0.08=0.07.

[0076] In some embodiments, within the maximum preset temperature difference threshold range of the first heating device and the second heating device, the set temperature of the heating device must satisfy the relationship: Ts-△Tmax≤Tx≤Ts+△Tmax, where Tx represents the heating temperature set by the first heating device and Ts represents the heating temperature set by the second heating device.

[0077] Temperature constraints are introduced based on actual temperature field characteristics to ensure the feasibility of temperature control. This ensures that the primary and secondary zone control strategies can reliably operate within a preset, experimentally verified temperature difference range, avoiding temperature control failure, safety risks, and equipment damage caused by excessive temperature differences. It also simplifies algorithm calibration and user operation. The experimentally calibrated ΔTmax represents the maximum controllable temperature difference that the oven can achieve while maintaining a stable temperature field. If the user-set temperature difference exceeds ΔTmax, the secondary temperature control zone, even operating at maximum or minimum power, will be unable to reach the set low or high temperature, causing the temperature to consistently deviate from the target. In some embodiments, the range of ΔTmax is 15-40℃.

[0078] Furthermore, the temperature points are selected from the minimum, intermediate, and maximum values ​​of the heating temperature set by the first heating device or the heating temperature set by the second heating device; the temperature difference points are selected from 0, ΔTmax, and the intermediate value.

[0079] This method of value selection constructs an N×M grid table using the fewest and most representative feature points, achieving coverage of the entire possible working range with minimal experimental calibration workload. The minimum and maximum heating temperatures correspond to the commonly used temperature boundaries of the oven, while the intermediate values ​​ensure linearity within the interpolation interval. The zero temperature difference point corresponds to the basic operating condition of the upper and lower cavities being at the same temperature, the intermediate temperature difference is the transition point, and ΔTmax is the maximum controllable temperature difference. This ensures that bilinear interpolation has good accuracy both at the boundaries and within the oven, while simplifying the calculation of normalized coordinates during runtime.

[0080] A second aspect of the present invention provides an oven, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When executed by the processor, the computer program implements the zoned temperature control method as described in any of the above embodiments. Detailed descriptions of the zoned temperature control method for the oven's heating element can be found in the above embodiments and will not be repeated here.

[0081] The terms and words used in the foregoing description and claims are not limited to their literal meaning, but are merely used by the applicant to enable a clear and consistent understanding of the invention. Therefore, those skilled in the art will understand that the foregoing description of various embodiments of the invention is illustrative only and not intended to limit the invention as defined by the appended claims and their equivalents.

Claims

1. A method for zoned temperature control of an oven heating element, characterized in that, The zoned temperature control method includes the following steps: Obtain the heating temperature set by the first heating device and the heating temperature set by the second heating device; By comparing the heating temperature set by the first heating device and the heating temperature set by the second heating device, the main temperature control zone and the auxiliary temperature control zone are determined. The area where the heating device with the higher temperature is located is the main temperature control zone, and the area where the heating device with the lower temperature is located is the auxiliary temperature control zone. Based on the heating temperature set by the first heating device and the heating temperature set by the second heating device, the corresponding preset mapping relationship is invoked to calculate the target temperature compensation value required by the heating device in the main temperature control zone and the target working power required by the heating device in the auxiliary temperature control zone. The heating device in the main temperature control zone adjusts the temperature based on the target temperature compensation value. The heating device in the auxiliary temperature control zone controls the temperature by outputting a fixed frequency based on the target operating power.

2. The oven heating device zone temperature control method according to claim 1, characterized in that: The preset mapping relationship is formed by collecting operating data from N different temperature points and M different temperature difference points. The preset mapping relationship forms an N×M data grid under the combination of the N temperature points and the M temperature difference points. Each point in the data grid stores the temperature compensation value and fixed operating power at that point.

3. The oven heating device zone temperature control method according to claim 2, characterized in that: The temperature point is a preset heating temperature point of the first heating device or the second heating device, and the temperature difference point is the difference between the preset heating temperature of the first heating device and the preset heating temperature of the second heating device.

4. The oven heating device zone temperature control method according to claim 2, characterized in that: The temperature compensation value is the temperature compensation value data obtained by the first heating device at the heating temperature, and the fixed working power is the fixed working power data used by the second heating device at the heating temperature; or, the temperature compensation value is the temperature compensation value data obtained by the second heating device at the heating temperature, and the fixed working power is the fixed working power data used by the first heating device at the heating temperature.

5. The oven heating device zone temperature control method according to claim 4, characterized in that, The corresponding preset mapping relationship is invoked, specifically including the following steps: There are two sets of preset mapping relationships. When the difference between the heating temperature set by the first heating device and the heating temperature set by the second heating device is a positive number, the first set of preset mapping relationships is invoked; when the difference between the heating temperature set by the first heating device and the heating temperature set by the second heating device is a negative number, the second set of preset mapping relationships is invoked; the horizontal coordinate axes of the first set of preset mapping relationships and the second set of preset mapping relationships are the same.

6. A method for zoned temperature control of an oven heating device according to any one of claims 2-5, characterized in that, Invoking the corresponding preset mapping relationship involves the following steps: The N×M data grid is divided into multiple regions based on the positions of points N and M. When the heating temperature set by the first heating device is Tx and the heating temperature set by the second heating device is Ts, the coordinates of the target point R at the preset temperature are obtained by substituting them into the corresponding pre-stored mapping relationship. The region where the target point R falls within the data grid is then determined, and the four corner coordinates Q of that region are called. 11 Q 12 Q 21 and Q 22 The system stores temperature compensation data and fixed operating power data, thereby calculating the target temperature compensation value required by the heating device in the main temperature control zone and the target operating power required by the heating device in the auxiliary temperature control zone.

7. A method for zoned temperature control of an oven heating device according to claim 6, characterized in that, The calculation of the target temperature compensation value required by the heating device in the main temperature control zone and the target operating power required by the heating device in the auxiliary temperature control zone specifically includes: After calling the data with the corresponding preset mapping relationship, the normalized coordinate formula and bilinear interpolation formula are substituted into the calculation; The formula for the normalized coordinates is as follows: x=(x R -x0) / (x1-x0): y=(y R -y0) / (y1-y0); The bilinear interpolation formula is as follows: Tx-set=(1-x)(1-y)*Q 11 (Temperature compensation value) + x(1-y)*Q 21 (Temperature compensation value) + (1-x)y*Q 12 (Temperature compensation value) + xy * Q 22 (Temperature compensation value); Ps-set=(1-x)(1-y)*Q 11 (fixed operating power value) + x(1-y)*Q 21 (fixed operating power value) + (1-x)y*Q 12 (fixed operating power value) + xy * Q 22 (Fixed operating power value); Wherein, the coordinates of the target point R are (x R ,y R The coordinates of the four corners of the area where the target point R is located are Q. 11 Q 12 Q 21 and Q 22 The coordinates of Q are (x0, y0), (x0, y1), (x1, y0), and (x1, y1). 11 Q 12 Q 21 and Q 22 Each location stores temperature compensation value data and fixed operating power data at the relevant temperature. Tx-set is the target temperature compensation value, and Ps-set is the target operating power.

8. A method for zoned temperature control of an oven heating device according to any one of claims 2-5, characterized in that: Within the maximum preset temperature difference threshold range of △Tmax between the first heating device and the second heating device, the set temperature of the heating device must satisfy the relationship: Ts-△Tmax≤Tx≤Ts+△Tmax, where Tx represents the heating temperature set by the first heating device and Ts represents the heating temperature set by the second heating device.

9. A method for zoned temperature control of an oven heating device according to claim 8, characterized in that: The temperature point is selected from the minimum, intermediate, and maximum values ​​of the heating temperature set by the first heating device or the heating temperature set by the second heating device; the temperature difference point is selected from 0, ΔTmax, and the intermediate value.

10. An oven, characterized in that: It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the zoned temperature control method as described in any one of claims 1-9.

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