Temperature uniformity control method and device of cavity and cooking equipment

Abstract

The invention relates to a cavity temperature uniformity control method and device and cooking equipment, the cavity comprises an inner wall extending in the width direction and the height direction, a plurality of fans and a plurality of heating devices are arranged on the inner wall in a matrix mode, and the cavity is further provided with a temperature monitoring device. The method comprises the following steps: dividing the cavity into a plurality of areas based on the row number and the column number of the matrix and the depth of the cavity, and obtaining the three-dimensional coordinates of the areas; acquiring the actual temperature of each area based on the temperature monitoring device; subtracting the actual temperature of each area from a preset temperature to obtain a temperature difference value of each area; if the temperature difference value of one or more target areas exceeds the preset temperature difference range, the output power or turn-off of the fans and the heating devices corresponding to the target areas is adjusted based on the three-dimensional coordinates and the temperature difference values of the target areas, and the problem that the temperature difference of different areas in the cavity of the steaming oven is large is solved.

Description

Technical Field

[0001] The present application relates to the field of cooking equipment, and in particular to a method and device for controlling temperature uniformity of a cavity, and cooking equipment. Background Art

[0002] Cooking equipment such as steamers and ovens heat the food in the cavity through heating tubes. When in use, the cavity temperature is usually measured by a temperature sensor set inside the cavity, and the power of the heating tube is adjusted according to the temperature. However, due to the large internal space of the steam oven, there is a certain deviation in the temperature of different areas of the cavity, resulting in uneven steaming and baking of food, and the expected cooking effect cannot be achieved. To address this problem, the relevant technology increases the number of temperature sensors in the cavity and corresponds the power of the heating tubes at different positions to the measured values ​​of the temperature sensors, but the temperature difference between different areas inside the cavity is still large. Summary of the invention

[0003] In this embodiment, a cavity temperature uniformity control method, device and cooking equipment are provided to solve the problem of large temperature difference between different areas inside the cavity of a steam oven existing in the related art.

[0004] In a first aspect, a method for controlling temperature uniformity of a cavity is provided in this embodiment, wherein the cavity includes an inner wall extending in width and height directions, a plurality of fans and a plurality of heating devices arranged in a matrix are provided on the inner wall, and the cavity is also provided with a temperature monitoring device, and the method includes:

[0005] Based on the number of rows and columns of the matrix and the depth of the cavity, the cavity is divided into a plurality of regions, and the three-dimensional coordinates of the regions are obtained;

[0006] Acquiring the actual temperature of each area based on the temperature monitoring device;

[0007] Subtract the actual temperature of each area from the preset temperature to obtain the temperature difference of each area;

[0008] If the temperature difference of one or more target areas exceeds the preset temperature difference range, the output power of the fan and the heating device corresponding to the target area is adjusted or turned off based on the three-dimensional coordinates and the temperature difference of the target area.

[0009] In some embodiments, adjusting the output power or shutting down the fan and the heating device corresponding to the target area based on the three-dimensional coordinates and the temperature difference of the target area includes:

[0010] Based on the three-dimensional coordinates of the target areas, the target areas are grouped, and the target areas in the same group have the same width coordinate value and height coordinate value;

[0011] Based on the number of target areas in the group, the temperature difference and the depth coordinate value, the output power of the fans and heating devices corresponding to the target areas in the group are adjusted or turned off, and the depth coordinate value of the target area is proportional to the distance from the target area to the inner wall.

[0012] In some embodiments, adjusting or shutting down the output power of fans and heating devices corresponding to the target areas in the group based on the number of target areas in the group, the temperature difference value, and the depth coordinate value includes:

[0013] When the number of target areas in the group is equal to 1, the output power of the fan and the heating device corresponding to the target area is adjusted or turned off based on the depth coordinate value and the temperature difference value of the target area.

[0014] In some embodiments, adjusting the output power or shutting down the fan and the heating device corresponding to the target area based on the depth coordinate value and the temperature difference value of the target area includes:

[0015] When the temperature difference of the target area is a positive number, the heating device is turned off, and the output power of the fan is proportional to the depth coordinate value;

[0016] When the temperature difference of the target area is a negative number, the output power of the heating device is proportional to the depth coordinate value; the fan is turned off or started based on the depth coordinate value, and the output power when started is proportional to the depth coordinate value.

[0017] In some embodiments, adjusting or shutting down the output power of fans and heating devices corresponding to the target areas in the group based on the number of target areas in the group, the temperature difference value, and the depth coordinate value includes:

[0018] When the number of target areas in the group is greater than 1, the temperature difference type of the group is obtained, and based on the correspondence between the preset temperature difference type and the power adjustment configuration, the corresponding power adjustment configuration is obtained, and the output power of the fan and heating device corresponding to the group is adjusted or shut down based on the power adjustment configuration.

[0019] In some embodiments, obtaining the temperature difference type of the group includes:

[0020] Based on the positive and negative temperature difference values ​​of each target area in the group and the corresponding depth coordinate values, the temperature difference type of the group is obtained.

[0021] In some of the embodiments, the output power of the fan and the heating device is adjusted in a linear manner or in a step-by-step manner.

[0022] In some of the embodiments, the temperature monitoring device is a thermal imager.

[0023] In a second aspect, in this embodiment, a temperature uniformity control device for a cavity is provided, wherein the cavity includes an inner wall extending in width and height directions, and a plurality of fans and a plurality of heating devices arranged in a matrix are provided on the inner wall. The cavity is also provided with a temperature monitoring device, and the device includes:

[0024] A segmentation module, used for dividing the cavity into a plurality of regions based on the number of rows and columns of the matrix and the depth of the cavity, and obtaining the three-dimensional coordinates of the regions;

[0025] An acquisition module, used for acquiring the actual temperature of each area based on the temperature monitoring device;

[0026] A calculation module, used for subtracting the actual temperature of each area from the preset temperature to obtain a temperature difference value of each area;

[0027] The control module is used to adjust or shut down the output power of the fan and heating device corresponding to the target area based on the three-dimensional coordinates and temperature difference of the target area if the temperature difference of one or more target areas exceeds the preset temperature difference range.

[0028] In a third aspect, a cooking device is provided in this embodiment, the cooking device comprising a cavity and a controller, the controller being used to control the temperature uniformity of the cavity according to the temperature uniformity control method of the cavity described in the first aspect.

[0029] Compared with the related art, the temperature uniformity control method of the cavity provided in the present embodiment is to set a plurality of fans and a plurality of heating devices arranged in a matrix on the inner wall, divide the cavity into a plurality of areas based on the number of rows and columns of the matrix and the depth of the cavity, obtain the three-dimensional coordinates of the areas, and use corresponding fans and heating devices to adjust the temperature of different areas; obtain the actual temperature of each area based on the temperature monitoring device, and subtract the actual temperature of each area from the preset temperature to obtain the temperature difference of each area, and determine the temperature that needs to be adjusted for each area; if there is one or more target areas whose temperature difference exceeds the preset temperature difference range, adjust the output power or shut down the fans and heating devices corresponding to the target areas based on the three-dimensional coordinates and temperature difference of the target areas, and compensate for the difference between the actual temperature of each target area and the preset temperature, thereby solving the problem of large temperature difference between different areas inside the steam oven cavity.

[0030] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0032] Figure 1 is a hardware structure block diagram of a cooking device in some embodiments of the present application;

[0033] Figure 2 is a flow chart of a temperature uniformity control method of a cavity in some embodiments of the present application;

[0034] Figure 3 is a flow chart of adjusting the fan and the heating device of some embodiments of the present application;

[0035] Figure 4 is a flow chart for adjusting the fan and the heating device when the number of target areas in the grouping is 1 in some embodiments of the present application;

[0036] Figure 5 is a flow chart of the adjustment of the fan and the heating device of some preferred embodiments of the present application;

[0037] Figure 6 It is a structural block diagram of a temperature uniformity control device for a cavity in some embodiments of the present application. DETAILED DESCRIPTION

[0038] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0040] The temperature uniformity control method of the cavity provided in the embodiment of the present application can be executed on a cooking device. Figure 1 1 is a hardware structure diagram of a cooking device in some embodiments of the present application. Figure 1 As shown, the cooking device includes a cavity 10 and a controller 12. The cavity 10 includes an inner wall 101 extending in width and height directions. The inner wall 101 is provided with a plurality of fans 103 and a plurality of heating devices 105 arranged in a matrix. The cavity 10 is also provided with a temperature monitoring device 107. It can be understood by those skilled in the art that Figure 1 The structure shown is for illustration only and does not limit the structure of the above cooking device. Figure 1 Different cooking equipment may also include Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0041] Specifically, the temperature monitoring device 107 may be a thermal imager.

[0042] Specifically, the output power of the fan 103 and the heating device 105 can be adjusted, and the adjustment method can be linear adjustment or step adjustment. In a specific embodiment, the heating device 105 is controlled by a thyristor to adjust the output power in steps. The fan 103 adjusts the output power in steps by adjusting the speed in steps.

[0043] Specifically, the controller 12 may include a processing device such as a CPU, an MCU, or a single-chip microcomputer that has data computing and signal processing capabilities. The controller 12 may be connected to the temperature monitoring device 107 by wire or wireless means to obtain temperature data of the temperature monitoring device 107. The controller 12 may be connected to each fan 103 and the heating device 105 by wire or wireless means to adjust the output power of each fan 103 and the heating device 105.

[0044] Furthermore, the controller 12 can also include a communication module for communicating with a host computer. The host computer can set the cavity temperature and send it to the controller 12. The controller 12 performs temperature uniformity control based on the preset cavity temperature, and sends relevant data such as the actual temperature of different areas of the cavity, the output power of the fan 103 and the heating device 105 in each area, and the fan speed to the host computer.

[0045] In this embodiment, a method for controlling the temperature uniformity of a cavity is provided. Figure 2 is a flow chart of a temperature uniformity control method for a cavity in some embodiments of the present application. Figure 2 As shown, the process includes the following steps:

[0046] Step S201 : Based on the number of rows and columns of the matrix and the depth of the cavity, the cavity is divided into a plurality of regions, and the three-dimensional coordinates of the regions are obtained.

[0047] The cavity of the cooking device is a relatively regular rectangular parallelepiped, and a three-dimensional coordinate system can be established based on the rectangular parallelepiped. Figure 1 As shown, the three-dimensional coordinate system takes the width direction of the inner wall 101 on which the fan 103 and the heating device 105 are set as the X-axis, the height direction of the inner wall 101 as the Y-axis, and the depth direction of the cavity as the Z-axis. Assuming that the number of fans 103 and heating devices 105 on the X-axis is M, and the number of fans 103 and heating devices 105 on the Y-axis is N, the X-axis is divided into M segments, the Y-axis is divided into N segments, and the Z-axis is divided into L segments according to the depth of the cavity 10, and the value of L can be preset. In this way, the cavity 10 is divided into M×N×L areas, each area has a corresponding three-dimensional coordinate, and each area has a corresponding set of fans 103 and heating devices 105 in the depth direction.

[0048] Step S202: obtaining the actual temperature of each area based on the temperature monitoring device.

[0049] In this embodiment, the actual temperature of each area can be collected at a preset temperature collection interval, and the temperature uniformity of each area can be controlled according to the collected actual temperature. The specific control means is to adjust the output power of the fan and heating device corresponding to each area or turn them off. During the entire cooking process, the temperature of each area can be continuously collected and the temperature uniformity control can be performed based on the interval.

[0050] In a specific embodiment, the temperature monitoring device in this embodiment may be a thermal imager, which collects thermal imaging images of the entire cavity and obtains the actual temperature of each area according to the position of each area in the image.

[0051] In another specific embodiment, the temperature monitoring device is a collection of temperature sensors respectively arranged in each area to obtain the actual temperature corresponding to each area.

[0052] Step S203, subtracting the actual temperature of each area from the preset temperature to obtain the temperature difference of each area.

[0053] The preset temperature of each zone is set based on cooking requirements, and each preset temperature can be the same. The temperature difference of each zone is equal to the actual temperature of the zone minus the preset temperature of the zone.

[0054] Step S204: if the temperature difference of one or more target areas exceeds the preset temperature difference range, the output power of the fan and the heating device corresponding to the target area is adjusted or turned off based on the three-dimensional coordinates and the temperature difference of the target area.

[0055] The temperature difference of each area is compared with a preset temperature difference range, which can be a temperature difference interval centered on 0 degrees, such as (-3, 3), (-5, 5), etc. If the temperature difference of one or more areas exceeds the preset temperature difference range, the area is determined to be a target area, and the output power of the fan and heating device corresponding to the target area in the depth direction is adjusted, or the corresponding fan and heating device are turned off to reduce the temperature difference of the area so that the temperature difference falls within the temperature difference range.

[0056] Through steps S201 to S204, by setting multiple fans and multiple heating devices arranged in a matrix on the inner wall, the cavity is divided into multiple areas based on the number of rows and columns of the matrix and the depth of the cavity, and the three-dimensional coordinates of the areas are obtained, and the corresponding fans and heating devices are used to adjust the temperature of different areas; by obtaining the actual temperature of each area based on the temperature monitoring device, and subtracting the actual temperature of each area from the preset temperature to obtain the temperature difference of each area, the temperature that needs to be adjusted in each area is determined; if there is one or more target areas whose temperature difference exceeds the preset temperature difference range, the output power of the fans and heating devices corresponding to the target areas is adjusted or turned off based on the three-dimensional coordinates and temperature difference of the target areas, so as to compensate for the difference between the actual temperature of each target area and the preset temperature, thereby solving the problem of large temperature difference between different areas inside the steam oven cavity.

[0057] In some embodiments, Figure 3 is a flow chart of adjusting the fan and the heating device in some embodiments of the present application, such as Figure 3 As shown, the process includes the following steps:

[0058] Step S301 : grouping the target areas based on the three-dimensional coordinates of the target areas, wherein the target areas in the same group have the same width coordinate value and height coordinate value.

[0059] When there are multiple target areas, the target areas are grouped according to their three-dimensional coordinates. Target areas with the same width coordinate value and height coordinate value are grouped together, that is, target areas corresponding to the same fan and heating device are grouped together.

[0060] Step S302, based on the number of target areas in the group, the temperature difference and the depth coordinate value, adjust the output power or shut down the fans and heating devices corresponding to the target areas in the group, and the depth coordinate value of the target area is proportional to the distance from the target area to the inner wall.

[0061] Assuming that the Z axis of the three-dimensional coordinate system is divided into L segments in the depth direction, the number of target areas in the same group is 1≤n≤L. The direction of the Z axis extends from the inner wall to the cavity, that is, the depth coordinate value of the target area is proportional to the distance from the target area to the inner wall. The closer the target area is to the inner wall, the smaller the depth coordinate value is, and the farther it is from the inner wall, the larger the depth coordinate value is.

[0062] If there is only one target area in the same group, the factors that need to be considered are relatively simple, and the output power or shutdown of the corresponding fan and heating device can be adjusted directly according to the temperature difference of the target area; if there are multiple target areas in the same group, the temperature difference and depth coordinate values ​​of multiple target areas can be combined for comprehensive adjustment.

[0063] Through steps S301 to S302, the target areas are grouped based on the three-dimensional coordinates of the target areas. The target areas in the same group have the same width coordinate value and height coordinate value, which is convenient for multiple fans and multiple heating devices arranged in a matrix to adjust the temperature of each target area respectively, so as to realize independent temperature control of each area in the width and height directions of the cavity; based on the number of target areas in the group, the temperature difference and the depth coordinate value, the output power of the fans and heating devices corresponding to the target areas in the group are adjusted or turned off, and on the premise of reducing the temperature difference of the target areas, the temperature impact on other areas in the cavity is reduced, the temperature uniformity and stability of the cavity are improved, and the temperature fluctuation of other areas caused by the temperature adjustment action of one area is avoided.

[0064] In some embodiments, when the number of target areas in a group is equal to 1, a specific method for adjusting the output power or shutting down the fan and heating device corresponding to the group is provided. The method includes:

[0065] When the number of target areas in the group is equal to 1, the output power of the fan and the heating device corresponding to the target area is adjusted or turned off based on the depth coordinate value and the temperature difference value of the target area.

[0066] Specifically, Figure 4 is a flow chart of adjusting the fan and the heating device corresponding to the case where the number of target areas in the grouping of some embodiments of the present application is 1, such as Figure 4 As shown, the process includes the following steps:

[0067] Step S401, when the temperature difference of the target area is a positive number, the heating device is turned off, and the output power of the fan is proportional to the depth coordinate value.

[0068] When the number of target areas in a group is equal to 1 and the temperature difference of the target area is a positive number, it can be known that the actual temperature of the target area in the group is higher than the preset temperature, and the temperature difference between the actual temperature of other areas in the group and the preset temperature is within the preset range. At this time, the heating device can be turned off to prevent the temperature of each area in the group from continuing to rise; and the output power of the fan is adjusted according to the depth coordinate value of the target area, wherein the output power of the fan is proportional to the depth coordinate value of the target area.

[0069] In a specific embodiment, the Z axis of the three-dimensional coordinate system is divided into three sections in the depth direction. The fan and the heating device are adjusted in steps, the fan gears are 1000 rpm, 1200 rpm and 1400 rpm, and the output power of the heating device is 800 W, 1000 W and 1200 W. The preset temperature difference range is (-5, 5).

[0070] When the temperature difference of the target area is ≥5, when the depth coordinate value of the target area z=1, the heating device is turned off, and the fan speed is 1000 rpm; when the depth coordinate value of the target area z=2, the heating device is turned off, and the fan speed is 1200 rpm; when the depth coordinate value of the target area z=3, the heating device is turned off, and the fan speed is 1400 rpm. That is, the closer the target area is to the inner wall, the lower the fan speed, and the farther it is from the inner wall, the higher the fan speed, so as to reduce the actual temperature of the target area through forced convection of the fan.

[0071] Step S402, when the temperature difference of the target area is negative, the output power of the heating device is proportional to the depth coordinate value; the fan is turned off or started based on the depth coordinate value, and the output power when started is proportional to the depth coordinate value.

[0072] When the number of target areas in a group is equal to 1 and the temperature difference of the target area is a negative number, it can be known that the actual temperature of the target area in the group is lower than the preset temperature, and the temperature difference between the actual temperature of other areas in the group and the preset temperature is within the preset range. At this time, the heating device can be started, and the output power of the heating device is proportional to the depth coordinate value to increase the actual temperature of the target area; determine whether to turn off or start the fan according to the depth coordinate value of the target area, and the output power of the fan when it is started is proportional to the depth coordinate value.

[0073] In a specific embodiment of step S401, when the temperature difference of the target area is ≤-5, when the depth coordinate value of the target area z=1, the output power of the heating device is 800W to increase the temperature of the target area, and the fan is not started to reduce the temperature impact on other areas; when the depth coordinate value of the target area z=2, the output power of the heating device is 1000W, and the fan speed is 1000 rpm, and the actual temperature of the target area is increased by forced convection of the fan; when the depth coordinate value of the target area z=3, the output power of the heating device is 1200W, and the fan speed is 1200 rpm, and the fan speed is increased to enhance the convection effect, so that the actual temperature of the target area farthest from the inner wall can be increased as soon as possible.

[0074] Through steps S401 to S402, when the temperature difference of the target area is a positive number, the heating device is turned off, and the output power of the fan is proportional to the depth coordinate value to prevent the temperature of each area in the group from continuing to rise, and the actual temperature of the target area is reduced by forced convection of the fan; when the temperature difference of the target area is a negative number, the output power of the heating device is proportional to the depth coordinate value; the fan is turned off or started based on the depth coordinate value, and the output power at startup is proportional to the depth coordinate value, and the actual temperature of the target area is increased by forced convection of the heating device and the fan, and the temperature impact on other areas is reduced, thereby improving the temperature uniformity of the cavity.

[0075] In some embodiments, it also relates to a specific method for adjusting the output power or shutting down the fan and heating device corresponding to the group when the number of target areas in the group is greater than 1. The method includes:

[0076] When the number of target areas in the group is greater than 1, the temperature difference type of the group is obtained, and based on the correspondence between the preset temperature difference type and the power adjustment configuration, the corresponding power adjustment configuration is obtained, and the output power of the fan and heating device corresponding to the group is adjusted or shut down based on the power adjustment configuration.

[0077] The number of target areas in the group is greater than 1, that is, the group includes 2 or more target areas, and the temperature difference of each target area may be negative or positive. The temperature difference type is a type obtained by permuting and combining the depth coordinates and temperature differences of multiple target areas in the group.

[0078] Specifically, the temperature difference type of the group may be acquired based on the positive and negative signs of the temperature difference values ​​of each target area in the group and the corresponding depth coordinate values.

[0079] In a specific embodiment, the Z axis of the three-dimensional coordinate system is divided into three sections in the depth direction, and one group includes three target areas z1, z2, and z3. The depth coordinate values ​​of the three target areas are z1=1, z2=2, and z3=3, respectively, and the temperature difference values ​​of z1, z2, and z3 are T1, T2, and T3, respectively. The preset temperature difference range is (-5, 5). Then the temperature difference type of the group can include (T1≥5, T2≥5, T3≤-5), (T1≥5, T2≤-5, T3≥5), (T1≥5, T2≤-5, T3≤-5), (T1≥5, T2≥5, T3≥5), (T1≤-5, T2≥5, T3≥5), (T1≤-5, T2≤-5, T3≥5), (T1≤-5, T2≤-5, T3≥5), (T1≤-5, T2≥5, T3≤-5), (T1≤-5, T2≥5, T3≤-5), (T1≤-5, T2≤-5, T3≤-5) 8 permutations and combinations.

[0080] The power adjustment configuration includes the output power adjustment configuration of the fan and the heating device corresponding to the group, including whether to start or shut down, and the output power when started. In this embodiment, the power adjustment configuration corresponding to different temperature difference types can be obtained by pre-testing, and the power adjustment configuration can improve the temperature uniformity of the temperature difference type. The correspondence between different temperature difference types and power adjustment configurations is stored in advance, and the corresponding power adjustment configuration is found according to the temperature difference type of the group, and the output power of the fan and the heating device corresponding to the group is adjusted or shut down based on the power adjustment configuration.

[0081] The temperature uniformity control method of the cavity of the present embodiment, when the number of target areas in a group is greater than 1, obtains the temperature difference type of the group, and based on the correspondence between the preset temperature difference type and the power adjustment configuration, obtains the corresponding power adjustment configuration, and adjusts the output power or shuts down the fan and heating device corresponding to the group based on the power adjustment configuration, thereby improving the temperature uniformity adjustment efficiency when the temperature difference type is complex and the number of target areas is large.

[0082] The present embodiment is described and illustrated below through a preferred embodiment. The cavity structure and three-dimensional coordinate system of the present preferred embodiment are as follows: Figure 1 As shown, the inner wall of the cavity is provided with fans and heating tubes arranged in 3×3. The temperature monitoring device of the cavity is a thermal imager. The cavity is divided into 3 sections in the X, Y, and Z axis directions, and the entire cavity is divided into 27 areas. The fans and heating tubes are adjusted in steps, and the fan gears are 1000 rpm, 1200 rpm, and 1400 rpm, respectively. The output power of the heating tubes is 800W, 1000W, and 1200W, respectively. The preset temperature difference range is (-5, 5).

[0083] Figure 5 is a flow chart of a temperature uniformity control method for a cavity according to some preferred embodiments of the present application. Figure 5 As shown, the process includes the following steps:

[0084] Step S501, obtaining the actual temperature of each area through a thermal imager;

[0085] Step S502, subtracting the actual temperature of each area from the preset temperature to obtain the temperature difference of each area;

[0086] Step S503, determining whether the temperature difference of each area falls within the range of (-5, 5);

[0087] Step S504: if the temperature difference values ​​of each area fall within the range of (-5, 5), repeat steps S501 to S503; if there are one or more target areas that do not fall within the range of (-5, 5), the target areas are grouped based on the three-dimensional coordinates of the target areas, and the target areas in the same group have the same width coordinate value and height coordinate value;

[0088] Step S505, determining whether there are two or more target areas in the group;

[0089] Step S506, when there are not two or more target areas, determining whether the depth coordinate value z of the target area satisfies z=1;

[0090] Step S507, when z=1, determining whether the temperature difference T of the target area satisfies T≤-5;

[0091] Step S508, when T≤-5 is satisfied, the heating tube is turned on at level 1, and the fan is not started;

[0092] Step S509, if T≤-5 is not satisfied, the heating tube is not started and the fan is turned on at level 1;

[0093] Step S510, when z=1 is not satisfied, determining whether z=2 is satisfied;

[0094] Step S511, when z=2, determining whether the temperature difference T of the target area satisfies T≤-5;

[0095] Step S512, when T≤-5 is satisfied, the heating tube is turned on at the second gear and the fan is turned on at the first gear;

[0096] Step S513, if T≤-5 is not satisfied, the heating tube is not started and the fan is turned on the second gear;

[0097] Step S514, when z=2 is not satisfied, determining whether the temperature difference T of the target area satisfies T≤-5;

[0098] Step S515, when T≤-5 is satisfied, the heating tube is turned on at gear 3 and the fan is turned on at gear 2;

[0099] Step S516, if T≤-5 is not satisfied, the heating tube is not started and the fan is turned on the third gear;

[0100] Step S517, when there are two or more target areas, determining whether there are three target areas;

[0101] Step S518, in the case that there are no three target areas, determining whether the temperature difference Ta and Tb of two target areas with increasing depth coordinates satisfy Ta≤-5 and Tb≥5;

[0102] Step S519, when Ta≤-5 and Tb≥5 are satisfied, determining whether the depth coordinates of the two target areas satisfy za=1 and zb=2;

[0103] Step S520, when za=1 and zb=2 is satisfied, the heating tube is turned on at the second gear, and the fan is not started;

[0104] Step S521, when za=1 and zb=2 are not satisfied, determining whether the depth coordinates of the two target areas satisfy za=2 and zb=3;

[0105] Step S522, when za=2 and zb=3 are satisfied, the heating tube is turned on at gear 2 and the fan is turned on at gear 1;

[0106] Step S523, when za=2 and zb=3 are not satisfied, the heating tube is turned on at level 1 and the fan is not started;

[0107] Step S524, if Ta≤-5 and Tb≥5 are not satisfied, determine whether Ta≥5 and Tb≤-5 are satisfied;

[0108] Step S525, when Ta≥5 and Tb≤-5 are satisfied, determining whether the depth coordinates of the two target areas satisfy za=1 and zb=2;

[0109] Step S526, when za=1 and zb=2 are satisfied, the heating tube is turned on at level 1, and the fan is turned on at level 1;

[0110] Step S527, when za=1 and zb=2 are not satisfied, determining whether the depth coordinates of the two target areas satisfy za=1 and zb=3;

[0111] Step S528, when za=1 and zb=3 are satisfied, the heating tube is turned on at level 1 and the fan is turned on at level 3;

[0112] Step S529, when za=1 and zb=3 are not satisfied, the heating tube is turned on at gear 1 and the fan is turned on at gear 2;

[0113] Step S530, when Ta≥5 and Tb≤-5 are not satisfied, determining whether Ta≤-5 and Tb≤-5 are satisfied;

[0114] Step S531, when Ta≤-5 and Tb≤-5 are satisfied, determining whether the depth coordinates of the two target areas satisfy za=1 and zb=2;

[0115] Step S532, when za=1 and zb=2, the heating tube is turned on at gear 3 and the fan is turned on at gear 2;

[0116] Step S533, when za=1 and zb=2 are not satisfied, determining whether the depth coordinates of the two target areas satisfy za=2 and zb=3;

[0117] Step S534, when za=2 and zb=3 are satisfied, the heating tube is turned on at level 3, and the fan is turned on at level 3;

[0118] Step S535, when za=2 and zb=3 are not satisfied, the heating tube is turned on at the second gear and the fan is turned on at the third gear;

[0119] Step S536, when Ta≤-5 and Tb≤-5 are not satisfied, determining whether the depth coordinates of the two target areas satisfy za=1 and zb=2;

[0120] Step S537, when za=1 and zb=2 is satisfied, the heating tube is turned on at level 1 and the fan is turned on at level 3;

[0121] Step S538, when za=1 and zb=2 are not satisfied, determining whether the depth coordinates of the two target areas satisfy za=1 and zb=3;

[0122] Step S539, when za=1 and zb=3, the heating tube is turned on at gear 1 and the fan is turned on at gear 2;

[0123] Step S540, when za=1 and zb=3 are not satisfied, the heating tube is turned on at the second gear and the fan is not started;

[0124] Step S541, when there are three target areas, determine whether the temperature differences T1, T2 and T3 of the three target areas with increasing depth coordinates satisfy T1≥5, T2≥5 and T3≤-5;

[0125] Step S542, if the conditions are met, the heating tube is not started and the fan is turned on the second gear;

[0126] Step S543, if not satisfied, determine whether T1≥5, T2≤-5 and T3≥5 are satisfied;

[0127] Step S544, if the conditions are met, the heating tube is turned on at level 1, and the fan is turned on at level 1;

[0128] Step S545, if not satisfied, determine whether T1≥5, T2≤-5 and T3≤-5 are satisfied;

[0129] Step S546, if the conditions are met, the heating tube is turned on at the second gear, and the fan is turned on at the third gear;

[0130] Step S547, if not satisfied, determine whether T1≤-5, T2≥5 and T3≥5 are satisfied;

[0131] Step S548, if the conditions are met, the heating tube is turned on at level 2, and the fan is not started;

[0132] Step S549, if not satisfied, determine whether T1≤-5, T2≤-5 and T3≥5 are satisfied;

[0133] Step S550, if the conditions are met, the heating tube is turned on at level 3 and the fan is turned on at level 1;

[0134] Step S551, if not satisfied, determine whether T1≤-5, T2≥5 and T3≤-5 are satisfied;

[0135] Step S552, if the conditions are met, the heating tube is turned on at the second gear, and the fan is turned on at the third gear;

[0136] Step S553, if not satisfied, determine whether T1≤-5, T2≤-5 and T3≤-5 are satisfied;

[0137] Step S554, if the conditions are met, the heating tube is turned on at level 3, and the fan is turned on at level 3;

[0138] Step S555: If the conditions are not met, the heating tube will not start and the fan will be turned to the third gear.

[0139] Through steps S501 to S555, the target areas are grouped based on the three-dimensional coordinates of the target areas, so that multiple fans and multiple heating devices arranged in a matrix can adjust the temperature of each target area separately, thereby realizing independent temperature control of each area in the width and height directions of the cavity; by obtaining the number of target areas in the same group, when the number of target areas is equal to 1, the heating device is started or shut down according to the polarity of the temperature difference of the target area, and the fan gear is determined according to the depth coordinates of the target area. The actual temperature of the target area is adjusted by forced convection of the fan, and the temperature impact on other areas is reduced, thereby improving the temperature uniformity of the cavity; when the number of target areas is greater than 1, the output power of the fan and the heating device corresponding to the group is adjusted or shut down based on the power adjustment configuration corresponding to the temperature difference type, thereby improving the adjustment efficiency of temperature uniformity when the temperature difference type is complex and the number of target areas is large.

[0140] This embodiment also provides a cavity temperature uniformity control device, which can be used as follows: Figure 1 Cooking equipment shown. Figure 6 is a structural block diagram of a temperature uniformity control device for a cavity in some embodiments of the present application, such as Figure 6 As shown, the device comprises:

[0141] A segmentation module 61 is used to divide the cavity into a plurality of regions based on the number of rows and columns of the matrix and the depth of the cavity, and obtain the three-dimensional coordinates of the regions;

[0142] An acquisition module 62 is used to acquire the actual temperature of each area based on the temperature monitoring device;

[0143] A calculation module 63 is used to calculate the difference between the actual temperature of each area and the preset temperature to obtain the temperature difference of each area;

[0144] The control module 64 is used to adjust or shut down the output power of the fan and the heating device corresponding to the target area based on the three-dimensional coordinates and the temperature difference of the target area if the temperature difference of one or more target areas exceeds the preset temperature difference range.

[0145] The temperature uniformity control device of the cavity of this embodiment is provided with a plurality of fans and a plurality of heating devices arranged in a matrix on the inner wall, and the cavity is divided into a plurality of areas by a segmentation module 61 based on the number of rows and columns of the matrix and the depth of the cavity, and the three-dimensional coordinates of the areas are obtained, and the temperature of different areas is adjusted using corresponding fans and heating devices; the actual temperature of each area is obtained by an acquisition module 62 based on a temperature monitoring device, and the actual temperature of each area is subtracted from the preset temperature by a calculation module 63 to obtain the temperature difference of each area, and determine the temperature that needs to be adjusted for each area; if there is one or more target areas whose temperature difference exceeds the preset temperature difference range, the output power of the fans and heating devices corresponding to the target areas is adjusted or turned off by a control module 64 based on the three-dimensional coordinates and temperature difference of the target areas, so as to compensate for the difference between the actual temperature of each target area and the preset temperature, thereby solving the problem of large temperature difference between different areas inside the cavity of the steam oven.

[0146] This embodiment further provides a cooking device, which includes a cavity and a controller, and the controller is used to control the temperature uniformity of the cavity based on the temperature uniformity control method of the cavity described in the above embodiment.

[0147] The cooking device of this embodiment divides the cavity into multiple areas based on the locations of the fans and heating devices and the depth of the cavity through a controller, and adjusts or shuts down the output power of the fans and heating devices corresponding to the target areas based on the temperature differences and three-dimensional coordinates of each area, thereby compensating for the difference between the actual temperature of each target area and the preset temperature, thereby solving the problem of large temperature differences between different areas inside the steam oven cavity.

[0148] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0149] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0150] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0151] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0152] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A method for controlling the temperature uniformity of a cavity, characterized in that: The cavity includes an inner wall extending in width and height directions, and a plurality of fans and a plurality of heating devices arranged in a matrix are provided on the inner wall. The cavity is also provided with a temperature monitoring device. The method includes: Based on the number of rows and columns of the matrix and the depth of the cavity, the cavity is divided into a plurality of regions, and the three-dimensional coordinates of the regions are obtained; Acquiring the actual temperature of each area based on the temperature monitoring device; Subtract the actual temperature of each area from the preset temperature to obtain the temperature difference of each area; If the temperature difference of one or more target areas exceeds the preset temperature difference range, the output power of the fan and the heating device corresponding to the target area is adjusted or turned off based on the three-dimensional coordinates and the temperature difference of the target area.

2. The method according to claim 1, characterized in that The adjusting or shutting down the output power of the fan and the heating device corresponding to the target area based on the three-dimensional coordinates and the temperature difference of the target area comprises: Based on the three-dimensional coordinates of the target areas, the target areas are grouped, and the target areas in the same group have the same width coordinate value and height coordinate value; Based on the number of target areas in the group, the temperature difference and the depth coordinate value, the output power of the fans and heating devices corresponding to the target areas in the group are adjusted or turned off, and the depth coordinate value of the target area is proportional to the distance from the target area to the inner wall.

3. The method according to claim 2, characterized in that The adjusting or shutting down of the output power of the fans and the heating devices corresponding to the target areas in the group based on the number of the target areas in the group, the temperature difference and the depth coordinate value comprises: When the number of target areas in the group is equal to 1, the output power of the fan and the heating device corresponding to the target area is adjusted or turned off based on the depth coordinate value and the temperature difference value of the target area.

4. The method according to claim 3, characterized in that The adjusting or shutting down the output power of the fan and the heating device corresponding to the target area based on the depth coordinate value and the temperature difference of the target area comprises: When the temperature difference of the target area is a positive number, the heating device is turned off, and the output power of the fan is proportional to the depth coordinate value; When the temperature difference of the target area is a negative number, the output power of the heating device is proportional to the depth coordinate value; the fan is turned off or started based on the depth coordinate value, and the output power when started is proportional to the depth coordinate value.

5. The method according to claim 2, characterized in that: The adjusting or shutting down of the output power of the fans and the heating devices corresponding to the target areas in the group based on the number of the target areas in the group, the temperature difference and the depth coordinate value comprises: When the number of target areas in the group is greater than 1, the temperature difference type of the group is obtained, and based on the correspondence between the preset temperature difference type and the power adjustment configuration, the corresponding power adjustment configuration is obtained, and the output power of the fan and heating device corresponding to the group is adjusted or shut down based on the power adjustment configuration.

6. The method according to claim 5, characterized in that The obtaining of the temperature difference type of the grouping includes: Based on the positive and negative temperature difference values ​​of each target area in the group and the corresponding depth coordinate values, the temperature difference type of the group is obtained.

7. The method according to claim 1, characterized in that The output power of the fan and the heating device can be adjusted in a linear or stepped manner.

8. The method according to claim 1, characterized in that The temperature monitoring device is a thermal imager.

9. A temperature uniformity control device for a cavity, characterized in that: The cavity includes an inner wall extending in width and height directions, and a plurality of fans and a plurality of heating devices arranged in a matrix are provided on the inner wall. The cavity is also provided with a temperature monitoring device, and the device includes: A segmentation module, used for dividing the cavity into a plurality of regions based on the number of rows and columns of the matrix and the depth of the cavity, and obtaining the three-dimensional coordinates of the regions; An acquisition module, used for acquiring the actual temperature of each area based on the temperature monitoring device; A calculation module, used for subtracting the actual temperature of each area from the preset temperature to obtain a temperature difference value of each area; The control module is used to adjust or shut down the output power of the fan and heating device corresponding to the target area based on the three-dimensional coordinates and temperature difference of the target area if the temperature difference of one or more target areas exceeds the preset temperature difference range.

10. A cooking device, characterized in that: The cooking device includes a cavity and a controller, wherein the controller is used to control the temperature uniformity of the cavity based on the temperature uniformity control method of the cavity described in any one of claims 1 to 8.

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