A steam oven and a temperature control method

Abstract

The present application provides a steam oven and a temperature control method, which relates to the technical field of electrical appliance control. The method includes obtaining input steam baking parameters, where the steam baking parameters include: a first preset temperature, a second preset temperature, and a preset steam baking duration; obtaining the detected temperature of a first temperature sensor and the detected temperature of a second temperature sensor; when the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating condition, starting a heat preservation mode to complete steam baking according to the steam baking parameters and a preset heat preservation duration, where, in the heat preservation mode, a first heating device maintains the first preset temperature and a second heating device maintains the second preset temperature. Thus, differential steam baking is realized, the needs of users for different steam baking effects on both sides are met, steam baking becomes more flexible and efficient, and the manpower and material resources spent on steam baking are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliance control, and more specifically, to a steam oven and a temperature control method. Background Art

[0002] Currently, using an oven as a cooking method for delicious food has become the mainstream cooking method for users. In the existing oven, a heating tube is provided, and high temperature is dissipated through the heating tube, so that the temperature inside the entire oven rises to achieve the baking effect and bake delicious food. The existing baking methods include: hot air baking, which uses a fan to strengthen the heat convection inside the furnace, and the hot air circulation is just a dry and high-temperature air; upper and lower tube heating, that is, the baking of a flat furnace, where heat convection heating is in a relatively secondary position, and heat ripening is mainly achieved by heat conduction. The principle of baking is to make the upper and lower temperatures reach the equilibrium temperature at the furnace center through the upper and lower tube heating method.

[0003] However, as users' cooking requirements become more and more strict, in order to achieve different baking effects on the upper and lower surfaces of the food during cooking, users need to manually turn the food over to change the upper and lower baking effects. Although this manual turning baking method can achieve the expected cooking effect, the baking efficiency is low and the risk is relatively high. Summary of the Invention

[0004] The purpose of the present invention is to provide a steam oven and a temperature control method for solving the problem of low baking efficiency in the existing technology in view of the above-mentioned deficiencies in the existing technology.

[0005] To achieve the above purpose, the technical solution adopted in this application is as follows:

[0006] In a first aspect, this application provides a steam oven, which includes: a box body, a box door, an inner container, and a control device; the inner container is embedded in the box body; the box body and the box door are connected in an openable and closable manner;

[0007] A support frame is provided in the middle of the inner container; a first heating device and a second heating device are respectively provided at the top and bottom plates of the inner container;

[0008] A first temperature sensor is provided between the support frame and the top of the inner container; a second temperature sensor is provided between the support frame and the bottom plate of the inner container;

[0009] The control device is arranged inside the box body and is electrically connected to the first heating device, the second heating device, the first temperature sensor, and the second temperature sensor respectively.

[0010] Optionally, a third heating device is provided on the surface of the inner container relative to the box door, and the control device is electrically connected to the third heating device.

[0011] Optionally, a blower is provided inside the inner container relative to the surface of the door; the control device is electrically connected to the blower.

[0012] In a second aspect, the present application provides a temperature control method for a steaming and baking machine, which is applied to the control device in the steaming and baking machine described in the first aspect. The method includes:

[0013] Obtain the input steaming and baking parameters, where the steaming and baking parameters include: a first preset temperature, a second preset temperature, and a preset steaming and baking duration;

[0014] Obtain the detected temperature of the first temperature sensor and the detected temperature of the second temperature sensor;

[0015] When the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, start the heat preservation mode to complete steaming and baking according to the steaming and baking parameters and the preset heat preservation duration. In the heat preservation mode, the first heating device maintains the first preset temperature, and the second heating device maintains the second preset temperature.

[0016] Optionally, when the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, starting the heat preservation mode according to the steaming and baking parameters and the preset heat preservation duration includes:

[0017] If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature and the detected temperature of the second temperature sensor is less than the second preset temperature, control the first heating device to enter the heat preservation mode;

[0018] If the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature and the detected temperature of the first temperature sensor is less than the first preset temperature, control the second heating device to enter the heat preservation mode.

[0019] Optionally, a third heating device is provided inside the inner container relative to the surface of the door, and the control device is electrically connected to the third heating device;

[0020] When the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, starting the heat preservation mode according to the steaming and baking parameters and the preset heat preservation duration includes:

[0021] If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature and the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, control the first heating device and the second heating device to enter the heat preservation mode, and control the third heating device to stop working.

[0022] Optionally, a blower is disposed inside the inner container relative to the surface of the door; the control device is electrically connected to the blower;

[0023] After the first heating device and the second heating device are controlled to enter the heat preservation mode, the method further includes:

[0024] Controlling the blower to stop working.

[0025] Optionally, after starting the heat preservation mode according to the steaming and baking parameters and the preset heat preservation duration, the method further includes:

[0026] Obtaining the heating duty cycle of the first heating device and the heating duty cycle of the second heating device in the heat preservation mode;

[0027] Calculating the sum of the heating duty cycles of the first heating device and the heating duty cycle of the second heating device;

[0028] Performing proportional-integral-derivative control on the first heating device and the second heating device according to the sum of the heating duty cycles and the preset heating period.

[0029] Optionally, performing proportional-integral-derivative control on the first heating device and the second heating device according to the sum of the heating duty cycles and the preset heating period includes:

[0030] If the sum of the heating duty cycles is greater than or equal to one, then in each heating period, using the start time point of the preset heating period as the heating start point of one of the two heating devices, and using the end time point of the preset heating period as the heating end point of the other of the two heating devices.

[0031] Optionally, performing proportional-integral-derivative control on the first heating device and the second heating device according to the sum of the heating duty cycles and the preset heating period further includes:

[0032] If the sum of the heating duty cycles is less than one, calculating a first difference by using the sum of the heating duty cycles and the preset heating period;

[0033] Calculating a second difference according to the first difference;

[0034] Using the second difference as the interval time, and sequentially controlling the first heating device and the second heating device to perform heating.

[0035] Compared with the prior art, the present application has the following beneficial effects:

[0036] The present application provides a steam oven and a temperature control method. The method obtains the input steam baking parameters, where the steam baking parameters include: a first preset temperature, a second preset temperature, and a preset steam baking duration; obtains the detected temperature of a first temperature sensor and the detected temperature of a second temperature sensor; when the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, starts a heat preservation mode to complete steam baking according to the steam baking parameters and a preset heat preservation duration. Wherein, in the heat preservation mode, a first heating device maintains the first preset temperature and a second heating device maintains the second preset temperature. Thus, by presetting the first preset temperature and the second preset temperature, in the heat preservation mode, controlling the first heating device to maintain the first preset temperature and the second heating device to maintain the second preset temperature can achieve differential steam baking, meet the needs of users for different steam baking effects on both sides, make steam baking more flexible and efficient, and reduce the manpower and material resources spent on steam baking. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 A schematic structural diagram of a steam oven provided by the present application;

[0039] Figure 2 A schematic structural diagram of a steam oven provided by another embodiment of the present application;

[0040] Figure 3 A schematic structural diagram of a steam oven provided by yet another embodiment of the present application;

[0041] Figure 4 A schematic flowchart of a temperature control method for a steam oven provided by the present application;

[0042] Figure 5 A schematic flowchart of a method for starting a heat preservation mode provided by the present application;

[0043] Figure 6 A schematic flowchart of a temperature control method for a heat preservation mode provided by the present application;

[0044] Figure 7 A schematic diagram of a heating cycle in which the sum of the heating duty ratios provided by the present application is greater than or equal to one;

[0045] Figure 8 A schematic flowchart of a temperature control method in which the sum of the heating duty ratios provided by the present application is less than one;

[0046] Figure 9 Schematic diagram of a heating cycle where the sum of the heating duty cycles provided for this application is less than one;

[0047] Figure 10 Schematic diagram of a temperature control device for a steam oven provided by an embodiment of this application;

[0048] Figure 11 Schematic diagram of a control device provided by an embodiment of this application.

[0049] Icons: 100 - control device, 200 - support frame, 300 - first heating device, 400 - second heating device, 500 - first temperature sensor, 600 - second temperature sensor, 700 - third heating device, 800 - fan, 1001 - first acquisition module, 1002 - second acquisition module, 1003 - control module, 1101 - processor, 1102 - storage medium. Detailed implementation manners

[0050] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Apparently, the described embodiments are some, but not all, of the embodiments of this application. Generally, the components of the embodiments of this application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of this application that is claimed, but merely represents selected embodiments of this application. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of this application.

[0052] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0053] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should also be noted that, unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] It should be noted that, without conflict, the features in the embodiments of the present invention can be combined with each other.

[0056] Based on the problems that the existing ovens require manual turning over, have low steaming and baking efficiency, and have issues with steaming and baking safety, the present application provides a new steaming and baking machine.

[0057] The following uses specific examples to explain a steaming and baking machine provided by the present application. Figure 1 It is a schematic structural diagram of a steaming and baking machine provided by the present application. As Figure 1 shown, the steaming and baking machine includes: a box body, a box door, an inner container, and a control device 100.

[0058] The inner container is embedded in the box body; the box body and the box door are connected in an openable and closable manner; a support frame 200 is provided in the middle of the inner container; a first heating device 300 and a second heating device 400 are respectively provided at the top and the bottom plate of the inner container; a first temperature sensor 500 is provided between the support frame 200 and the top of the inner container; a second temperature sensor 600 is provided between the support frame 200 and the bottom plate of the inner container; the control device is arranged inside the box body and is electrically connected to the first heating device 300, the second heating device 400, the first temperature sensor 500, and the second temperature sensor 600 respectively.

[0059] The inner container and the box body are fixedly arranged through a structured fixing member to keep the relative positions of the inner container and the box body unchanged. Exemplarily, the shape of the box body can be a cuboid, a cube, a quasi-cuboid, etc., and the external edges of the box body are smooth surfaces with rounded corners, which is convenient for users to pick up the steaming and baking machine. Between the box body and the inner container, except for the fixedly arranged structured fixing member, other positions are arranged in a heat-insulating manner (for example, there is no contact at other positions between the box body and the inner container, or other positions are filled with heat-insulating materials) to prevent the steaming and baking heat inside the inner container from being transferred to the box body and causing danger.

[0060] A plurality of support members can be provided at the bottom of the box body for supporting the steaming and baking machine, and anti-slip sleeves are sleeved outside the support members to prevent the steaming and baking machine from moving and causing danger. A power cord is provided on the side of the box body for connecting to a power source to supply power to the steaming and baking machine, and the power cord can be electrically connected to the control device.

[0061] The material of the inner container is heat-resistant material (e.g., metal). The steaming and baking temperature inside the inner container often reaches several hundred degrees. The heat-resistant material can ensure that the inner container does not deform and does not produce peculiar smell, ensuring the safety of steaming and baking.

[0062] The material of the door is the same as that of the box body. A sealing ring is provided at the contact position where the box body and the door open and close to ensure that when the door is closed, the heat leakage inside the inner container is reduced and the steaming and baking efficiency is improved. A heat-resistant material is provided on the side of the door facing the inner container to prevent the heat inside the inner container from affecting the door. For example, the heat-resistant material provided on the side of the door facing the inner container can be the same material as the inner container or a transparent heat-resistant material, which is convenient for users to observe the steaming and baking situation from the outside.

[0063] A plurality of plug-in positions are provided in the middle of the inner container. The support frame 200 can be placed in different plug-in positions to adapt to the sizes of different steaming and baking objects. The support frame 200 is in a hollow shape, which is convenient for food to receive steaming and baking heat. The material of the support frame 200 is heat-resistant material (e.g., metal).

[0064] The first heating device 300 is arranged at the top of the inner container and mainly steams and bakes the side of the steaming and baking object facing the top of the inner container. The second heating device 400 is arranged at the bottom of the inner container and mainly steams and bakes the side of the steaming and baking object facing the bottom of the inner container. By arranging two different heating devices to heat the steaming and baking object, different steaming and baking effects can be produced on both sides of the steaming and baking object without manual turning. For example, the first heating device 300 and the second heating device 400 can be heating tubes.

[0065] The first temperature sensor 500 is used to detect the real-time steaming and baking temperature of the side of the steaming and baking object facing the top of the inner container; the second temperature sensor 600 is used to detect the actual steaming and baking temperature of the side of the steaming and baking object facing the bottom of the inner container.

[0066] During the steaming and baking process, the control device 100 obtains the actual steaming and baking temperatures of both sides of the steaming and baking object through the first temperature sensor 500 and the second temperature sensor 600, and respectively controls the first heating device 300 and the second heating device 400 according to the user's steaming and baking requirements. After preheating the inner container environment, steaming and baking are carried out, so that the actual steaming and baking temperatures of both sides of the steaming and baking object are the steaming and baking temperatures required by the user.

[0067] Thus, the control device 100 respectively controls the first heating device 300 and the second heating device 400 to carry out steaming and baking, making the steaming and baking more flexible and efficient, meeting the user's requirements for different steaming and baking effects on both sides, improving the steaming and baking efficiency, and reducing the manpower and material resources spent on steaming and baking.

[0068] In summary, in this embodiment, the steam oven includes: a box body, a box door, an inner container, and a control device; the inner container is embedded in the box body; the box body and the box door are connected in an openable and closable manner; a support frame is provided in the middle of the inner container; a first heating device and a second heating device are respectively provided at the top and the bottom plate of the inner container; a first temperature sensor is provided between the support frame and the top of the inner container; a second temperature sensor is provided between the support frame and the bottom plate of the inner container; the control device is arranged inside the box body and is electrically connected to the first heating device, the second heating device, the first temperature sensor, and the second temperature sensor respectively. Thus, the control device controls the first heating device and the second heating device to perform steaming and roasting respectively, making the steaming and roasting more flexible and efficient, meeting the needs of users for different steaming and roasting effects on both sides, improving the steaming and roasting efficiency, and reducing the manpower and material resources spent on steaming and roasting.

[0069] In another embodiment, the present application also provides a steam oven. Figure 2 It is a schematic structural diagram of the steam oven provided in another embodiment of the present application.

[0070] As Figure 2 shown, a third heating device 700 is provided on the surface of the inner container relative to the box door, and the control device 100 is electrically connected to the third heating device 700.

[0071] The third heating device 700 is located in the middle of this surface of the inner container. The third heating device 700 is used to heat at a position between the first heating device 300 and the second heating device 400 to generate heat, so as to supplement the heat generated by the first heating device 300 and the second heating device 400, and the steaming and roasting efficiency can be improved. The control device 100 controls the heating of the third heating device 700.

[0072] Exemplarily, the third heating device 700 can be a heating tube. Optionally, in the preheating stage, in order to quickly preheat the inner container environment to reach the steaming and roasting temperature, the control device 100 can control the third heating device 700 to start to supplement the temperature in the steam oven.

[0073] In summary, in this embodiment, a third heating device is provided on the surface of the inner container relative to the box door, and the control device is electrically connected to the third heating device, thereby improving the steaming and roasting efficiency.

[0074] In another embodiment, the present application also provides a steam oven. Figure 3 It is a schematic structural diagram of the steam oven provided in another embodiment of the present application.

[0075] As Figure 3 shown, a blower 800 is provided on the surface of the inner container relative to the box door; the control device 100 is electrically connected to the blower 800.

[0076] The blower 800 is located in the middle of the inner liner surface. After the blower 800 is turned on, it generates wind and waves to evenly blow the heat of the third heating device 700 to various positions in the inner liner, timely supplement the heat generated by the first heating device 300 and the second heating device 400, and improve the steaming and baking efficiency. The control device 100 controls the on / off of the third heating device 700.

[0077] In summary, in this embodiment, a blower is provided inside the inner liner relative to the surface of the door; the control device is electrically connected to the blower. Thus, the steaming and baking efficiency is improved.

[0078] In another embodiment, the third heating device 700 and the blower 800 are used to be turned on during the preheating process.

[0079] During the preheating stage, in order to quickly preheat the inner liner environment to reach the steaming and baking temperature, the control device 100 can control the third heating device 700 and the blower 800 to be turned on simultaneously, and the heat of the third heating device 700 is evenly blown to various positions in the inner liner by the wind and waves generated by the blower 800. Combined with the heat generated by the first heating device 300 and the second heating device 400, the inner liner can be quickly preheated.

[0080] However, due to the functions of the third heating device 700 and the blower 800, the heat at the top and bottom of the inner liner is mixed, resulting in similar temperatures at the top and bottom of the inner liner, which cannot meet the differential steaming and baking of both sides of the steamed and baked object. After the preheating is completed and the steaming and baking stage is entered, there is no need for the third heating device 700 and the blower 800 to supplement heat. Therefore, the third heating device 700 and the blower 800 are used to be turned on during the preheating process. On the basis of ensuring the differential steaming and baking of both sides of the steamed and baked object, the steaming and baking preheating efficiency is improved.

[0081] In summary, in this embodiment, the third heating device and the blower are used to be turned on during the preheating process. Thus, on the basis of ensuring the differential steaming and baking of both sides of the steamed and baked object, the steaming and baking preheating efficiency is improved.

[0082] In another embodiment, the first heating device 300 and the second heating device 400 are heating tubes with different heating powers respectively.

[0083] On the basis that the control device 100 can control the first heating device 300 and the second heating device 400 to achieve different steaming and baking temperatures. If the first heating device 300 and the second heating device 400 are heating tubes with the same power, one of the heating devices is often in high-temperature heating and in a high-load working state, which poses a safety hazard. If the first heating device 300 and the second heating device 400 are the same and high-power heating tubes, the risk of frequent high-temperature heating is avoided, but the cost will increase.

[0084] Exemplarily, the first heating device 300 is a high-power heating tube, and the second heating device 400 is a low-power heating tube. Of course, it can also be set the other way around, which is not limited herein. It can be prompted to the user in the instructions that it is recommended to face the side for high-temperature steaming and baking towards the first heating device 300 and the side not for high-temperature steaming and baking towards the second heating device 400. On the basis of ensuring steaming and baking safety, the steaming and baking cost is saved.

[0085] In summary, in this embodiment, the first heating device and the second heating device are respectively heating tubes with different heating powers. Thus, on the basis of ensuring steaming and baking safety, the steaming and baking cost is saved.

[0086] In another embodiment, both the first heating device 300 and the second heating device 400 are embedded in a waterproof and heat-conducting material.

[0087] Both the first heating device 300 and the second heating device 400 are embedded in a waterproof and heat-conducting material, which avoids the influence of the steam generated during steaming and baking on the heating device while achieving efficient heat conduction.

[0088] Furthermore, the third heating device 700 is also embedded in the waterproof and heat-conducting material, which avoids the influence of the steam generated during steaming and baking on the heating device while achieving efficient heat conduction.

[0089] In another embodiment, a temperature control switch is provided outside the box body; the temperature control switch is connected to the control device 100 to transmit control steaming and baking parameters to the control device 100.

[0090] The user adjusts the temperature control switch to transmit control steaming and baking parameters to the control device 100. Quantifying the steaming and baking requirements through the steaming and baking parameters improves the accuracy of steaming and baking temperature control.

[0091] Exemplarily, the temperature control switch can be a manual electronic switch for manual control; it can also be a visual temperature control interface, and the user can click and operate it, which is convenient for the user to control.

[0092] In summary, in this embodiment, a temperature control switch is provided outside the box body; the temperature control switch is connected to the control device to transmit control steaming and baking parameters to the control device. Thus, it is convenient for the user to control and improves the accuracy of steaming and baking temperature control.

[0093] Furthermore, the steaming and baking parameters include: the heating temperature of the first heating device, the heating temperature of the second heating device, and the steaming and baking time.

[0094] During steaming and baking, the heating temperature of the first heating device 300 is the temperature detected by the first temperature sensor 500 under the control of the control device 100. During steaming and baking, the heating temperature of the second heating device 400 is the temperature detected by the second temperature sensor 600 under the control of the control device 100. The steaming and baking time is the time from the start to the end of steaming and baking, where the steaming and baking time includes the preheating time.

[0095] In another embodiment, both the first temperature sensor 500 and the second temperature sensor 600 are fixed on the side wall of the inner container.

[0096] The first temperature sensor 500 and the second temperature sensor 600 are used to detect the steaming and baking temperatures of both sides of the steamed and baked object in real time. Fixing both the first temperature sensor 500 and the second temperature sensor 600 on the side wall of the inner container makes the first temperature sensor 500 and the second temperature sensor 600 closer to the surface of the steamed and baked object, and the detected steaming and baking temperatures of both sides of the steamed and baked object are more accurate, improving the accuracy of steaming and baking temperature control.

[0097] In summary, in this embodiment, both the first temperature sensor and the second temperature sensor are fixed on the side wall of the inner container. Thus, the accuracy of steaming and baking temperature control is improved.

[0098] In another embodiment, the distance between the first temperature sensor 500 and the support frame 200 is within a first preset range; the distance between the second temperature sensor 600 and the support frame 200 is within a second preset range.

[0099] The distance between the first temperature sensor 500 and the highest plug-in position for placing the support frame 200 is within a first preset range. No matter which plug-in position the support frame 200 is placed on, the first temperature sensor 500 is located above the steamed and baked object, and can accurately obtain the real-time steaming and baking temperature of the side of the steamed and baked object relative to the top of the inner container.

[0100] The distance between the second temperature sensor 600 and the lowest plug-in position for placing the support frame 200 is within a second preset range. No matter which plug-in position the support frame 200 is placed on, the second temperature sensor 600 is located below the steamed and baked object, and can accurately obtain the real-time steaming and baking temperature of the side of the steamed and baked object relative to the bottom of the inner container.

[0101] Exemplarily, since the steamed and baked object is placed above the support frame 200 and there is no object below, the first preset range can be larger than the second preset range, so that the first temperature sensor is always located above the steamed and baked object. For example, the first preset range can be from 1 centimeter to 5 centimeters; the second preset range can be from 1 centimeter to 3 centimeters.

[0102] In summary, in this embodiment, the distance between the first temperature sensor and the support frame is within a first preset range; the distance between the second temperature sensor and the support frame is within a second preset range. Thus, the roasting temperatures on both sides of the roasted object are detected more accurately, improving the accuracy of the roasting temperature control.

[0103] In another embodiment, exhaust holes are provided at corresponding positions of the inner container and the box body. So that the steam generated by roasting can be discharged in time, avoiding affecting the roasting effect.

[0104] The following uses specific examples to explain a temperature control method for a roasting machine provided by the present application. Figure 4 It is a schematic flowchart of a temperature control method for a roasting machine provided by the present application. The execution subject of this method is the control device in the roasting machine, and this control device can be a device with computing and processing functions, for example, a microcontroller unit (MCU). As Figure 4 shown, this method includes:

[0105] S101. Obtain the input roasting parameters.

[0106] Among them, the roasting parameters include: a first preset temperature, a second preset temperature, and a preset roasting duration.

[0107] For example, the roasting parameters input by the user can be obtained through a temperature control switch. The temperature control switch can be a physical switch or a virtual switch on a touch screen, which is not limited here.

[0108] Exemplarily, the user sets the first preset temperature, the second preset temperature, and the preset roasting duration through the temperature control switch. The first preset temperature and the second preset temperature can be the same temperature value (for example, both are 200 degrees), or different temperature values (for example, the first preset temperature is 180 degrees and the second preset temperature is 220 degrees). Different setting methods can achieve different roasting effects. Combined with the preset roasting duration, it can affect the final roasting effect.

[0109] If the input roasting parameters are obtained, it is regarded as an instruction to start roasting. The first heating device and the second heating device can be controlled to start heating. When starting to heat, the temperature of the inner container chamber of the roasting machine is relatively low, and the inner container chamber needs to be preheated. Therefore, the first heating device and the second heating device can be controlled to heat at the maximum power, so that the chamber temperature can quickly reach the roasting requirements and improve the roasting efficiency.

[0110] S102. Obtain the detected temperature of the first temperature sensor and the detected temperature of the second temperature sensor.

[0111] During the process of controlling the heating of the first heating device and the second heating device, in order to accurately control the heating power of the first heating device and the second heating device respectively, it is necessary to obtain the detected temperatures of the first temperature sensor and the second temperature sensor in real time. According to the detected temperatures of the first temperature sensor and the second temperature sensor, it is possible to determine whether the actual steaming and baking temperatures on both sides of the steamed and baked object meet the steaming and baking parameters set by the user. Through the first temperature sensor and the second temperature sensor, the actual steaming and baking temperatures on both sides of the steamed and baked object can be accurately detected, and the temperatures on both sides of the steamed and baked object can be controlled differentially and accurately.

[0112] S103. When the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, start the heat preservation mode to complete steaming and baking according to the steaming and baking parameters and the preset heat preservation duration.

[0113] Among them, in the heat preservation mode, the first heating device maintains the first preset temperature, and the second heating device maintains the second preset temperature.

[0114] If the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, it indicates that the preheating work of the inner container chamber has been completed, and the temperatures at all parts of the entire inner container chamber have met the steaming and baking requirements. Then, start the heat preservation mode to continue completing steaming and baking according to the steaming and baking parameters and the preset heat preservation duration. When the steaming and baking duration is greater than or equal to the preset heat preservation duration, it indicates that the steaming and baking work has been completed. Stop temperature control, turn off the first heating device and the second heating device, and an acoustic and optical signal can be used to remind the user that the steaming and baking has been completed.

[0115] During the process of heat preservation steaming and baking, the side of the steamed and baked object close to the first heating device continuously receives steaming and baking at the first preset temperature, and the side of the steamed and baked object close to the second heating device continuously receives steaming and baking at the second preset temperature. By presetting the first preset temperature and the second preset temperature in advance, the user can control the first heating device to maintain the first preset temperature and the second heating device to maintain the second preset temperature in the heat preservation mode, so as to achieve differential steaming and baking, meet the user's needs for different steaming and baking effects on both sides, make the steaming and baking more flexible and efficient, and reduce the manpower and material resources spent on steaming and baking.

[0116] Exemplarily, in the heat preservation mode, if the detected temperature of the first temperature sensor is less than the first preset temperature, control the first heating device to increase the heating power; if the detected temperature of the first temperature sensor is greater than the first preset temperature, control the first heating device to decrease the heating power to maintain the first preset temperature. If the detected temperature of the second temperature sensor is less than the second preset temperature, control the second heating device to increase the heating power; if the detected temperature of the second temperature sensor is greater than the second preset temperature, control the second heating device to decrease the heating power to maintain the second preset temperature.

[0117] In summary, in this embodiment, the input steaming and baking parameters are obtained, where the steaming and baking parameters include: a first preset temperature, a second preset temperature, and a preset steaming and baking duration; the detected temperatures of the first temperature sensor and the second temperature sensor are obtained; when the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, the heat preservation mode is started according to the steaming and baking parameters and the preset heat preservation duration, where, in the heat preservation mode, the first heating device maintains the first preset temperature and the second heating device maintains the second preset temperature. Thus, by presetting the first preset temperature and the second preset temperature in advance and controlling the first heating device to maintain the first preset temperature and the second heating device to maintain the second preset temperature in the heat preservation mode, differential steaming and baking can be achieved to meet the user's requirements for different steaming and baking effects on both sides, making the steaming and baking more flexible and efficient, and reducing the manpower and material resources spent on steaming and baking.

[0118] In another embodiment, the present application also provides a method for starting the heat preservation mode. Figure 5 The flow chart of a method for starting the heat preservation mode provided by the present application is as follows. As Figure 5 shown, when the detected temperatures of the first temperature sensor and the second temperature sensor in S103 meet the preheating conditions, starting the heat preservation mode according to the steaming and baking parameters and the preset heat preservation duration includes:

[0119] S201. If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature and the detected temperature of the second temperature sensor is less than the second preset temperature, control the first heating device to enter the heat preservation mode.

[0120] In the preheating stage, both the first heating device and the second heating device heat in the high-power mode. During the preheating process, heat convection will occur in the inner cavity of the baking chamber, and the first preset temperature and the second preset temperature may be different, making it difficult for the actual temperatures on both sides of the steamed or baked item to reach the preset temperature simultaneously.

[0121] If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature and the detected temperature of the second temperature sensor is less than the second preset temperature, it indicates that the actual temperature of the side of the steamed or baked item close to the first heating device has reached the first preset temperature, and the side of the steamed or baked item close to the second heating device has not reached the second preset temperature. Then control the first heating device to enter the heat preservation mode to maintain the first preset temperature, and control the second heating device to continue preheating until the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, and also control the second heating device to enter the heat preservation mode.

[0122] S202. If the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature and the detected temperature of the first temperature sensor is less than the first preset temperature, control the second heating device to enter the heat preservation mode.

[0123] If the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, and the detected temperature of the first temperature sensor is less than the first preset temperature. It indicates that the actual temperature of the side of the steamed and roasted item close to the second heating device has reached the second preset temperature, while the side of the steamed and roasted item close to the first heating device has not reached the first preset temperature. Then control the second heating device to enter the heat preservation mode to maintain the second preset temperature. And control the first heating device to continue preheating until the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature, and also control the first heating device to enter the heat preservation mode.

[0124] In the preheating stage, through differential control, the heating device that meets the preheating conditions first enters the heat preservation mode first, improving the preheating efficiency.

[0125] In addition, if the steaming and roasting duration exceeds the preset preheating duration and the detected temperatures of the first temperature sensor and the second temperature sensor do not meet the preheating conditions, then control the first heating device and the second heating device to enter the heat preservation mode. Exemplarily, the preset preheating duration can be a parameter pre-set by the user, such as 10 minutes.

[0126] In summary, in this embodiment, if the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature, and the detected temperature of the second temperature sensor is less than the second preset temperature, then control the first heating device to enter the heat preservation mode; if the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, and the detected temperature of the first temperature sensor is less than the first preset temperature, then control the second heating device to enter the heat preservation mode. Thus, in the preheating stage, through differential control, the preheating efficiency is improved.

[0127] In another embodiment, a third heating device is provided on the inner surface of the inner container relative to the surface of the door, and the control device is electrically connected to the third heating device.

[0128] Further, when the detected temperatures of the first temperature sensor and the second temperature sensor in S103 meet the preheating conditions, starting the heat preservation mode according to the steaming and roasting parameters and the preset heat preservation duration includes:

[0129] If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature, and the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, then control the first heating device and the second heating device to enter the heat preservation mode, and control the third heating device to stop working.

[0130] In the preheating stage, start the third heating device to start heating. The heat generated by the third heating device can supplement the heat on both sides of the steamed and roasted item, so that the actual temperatures on both sides of the steamed and roasted item can reach the preset temperature faster to complete the preheating and improve the preheating efficiency.

[0131] After the preheating is completed and the heat preservation mode is entered, the two sides of the steamed and roasted object need to be steamed and roasted at a preset temperature stably and precisely. However, the heat generated by the third heating device will cause heat flow in the inner container chamber, which has a greater impact on the effect of steaming and roasting at a preset temperature stably and precisely. Therefore, when the first heating device and the second heating device enter the heat preservation mode, the third heating device is controlled to stop working, so as to realize steaming and roasting the two sides of the steamed and roasted object at a preset temperature stably and precisely.

[0132] In summary, in this embodiment, a third heating device is provided on the inner surface of the inner container relative to the surface of the door. The control device is electrically connected to the third heating device. If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature, and the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, then the first heating device and the second heating device are controlled to enter the heat preservation mode, and the third heating device is controlled to stop working. Thus, the preheating efficiency is improved by controlling the third heating device.

[0133] In another embodiment, a blower is provided on the inner surface of the inner container relative to the surface of the door; the control device is electrically connected to the blower.

[0134] Further, after the first heating device and the second heating device are controlled to enter the heat preservation mode, it further includes:

[0135] Controlling the blower to stop working.

[0136] In the preheating stage, when the first heating device, the second heating device, and the third heating device are started to heat, the blower is also controlled to start working. The wind and waves generated by the blower will drive the heat generated by the first heating device, the second heating device, and the third heating device, so that the heat received by the two sides of the entire steamed and roasted object is more uniform, and the actual temperature of the two sides of the steamed and roasted object can reach the preset temperature faster, so as to complete the preheating and improve the preheating efficiency.

[0137] After the preheating is completed and the heat preservation mode is entered, the two sides of the steamed and roasted object need to be steamed and roasted at a preset temperature stably and precisely. However, the wind and waves generated by the blower will cause heat flow in the inner container chamber, which has a greater impact on the effect of steaming and roasting at a preset temperature stably and precisely. Therefore, when the first heating device and the second heating device enter the heat preservation mode, the blower is controlled to stop working, so as to realize steaming and roasting the two sides of the steamed and roasted object at a preset temperature stably and precisely.

[0138] In summary, in this embodiment, a blower is provided on the inner surface of the inner container relative to the surface of the door; the control device is electrically connected to the blower; the blower is controlled to stop working. Thus, the preheating efficiency is improved by controlling the blower.

[0139] In another embodiment, the present application provides a temperature control method for the heat preservation mode.Figure 6 This is a schematic flowchart of a temperature control method for a heat preservation mode provided by this application. As Figure 6 shown, after starting the heat preservation mode according to the steaming and baking parameters and the preset heat preservation duration in S103, it further includes:

[0140] S301. Obtain the heating duty cycle of the first heating device and the heating duty cycle of the second heating device in the heat preservation mode.

[0141] During the working process of the heating device, it does not always heat. In one heating cycle, it first heats with full power output, and then has no power output and does not heat during the remaining time.

[0142] The heating duty cycle refers to the ratio of the time of full power output in each heating cycle to the heating cycle. The heating duty cycle characterizes the full power output time of the heating device in the heating cycle, and thus the time of no power output of the heating device in the heating cycle can be determined.

[0143] Obtain the heating duty cycle of the first heating device and the heating duty cycle of the second heating device in the heat preservation mode. The full power output time and the time of no power output of the first heating device and the second heating device in the heating cycle can be respectively known, so as to facilitate the precise control of the first heating device and the second heating device.

[0144] S302. Calculate the sum of the heating duty cycles of the first heating device and the second heating device.

[0145] Add the heating duty cycle of the first heating device and the heating duty cycle of the second heating device to obtain the sum of the heating duty cycles of the first heating device and the second heating device.

[0146] S303. Perform proportional-integral-derivative control on the first heating device and the second heating device according to the sum of the heating duty cycles and the preset heating cycle.

[0147] When controlling the first heating device and the second heating device to heat, if only the first heating device and the second heating device are turned on without other control. During the heating cycle, it is possible that the time of simultaneous full power output of the first heating device and the second heating device is relatively long, and as a result, the time of simultaneous no power output of the first heating device and the second heating device is also relatively long. In this case, when the first heating device and the second heating device simultaneously have full power output, the heat generated will cause counter blowing in the inner cavity of the inner container, and the heat in the entire inner cavity of the inner container will become chaotic and very unstable, making the actual steaming and baking temperatures on both sides of the steamed and baked object extremely unstable and unable to achieve precise differential steaming and baking.

[0148] According to the sum of the heating duty cycles and the preset heating period, the full-power output time of the first heating device and the second heating device can be controlled within the heating period, so that the first heating device and the second heating device perform full-power output in a staggered manner in turn, avoiding the situation that the first heating device and the second heating device both perform full-power output for a long time, and making the full-power output distribution of the first heating device and the second heating device more uniform. Thus, it is possible to avoid as much as possible the heat generated by the first heating device and the second heating device at the same time from generating counterblows in the inner cavity, making the actual steaming and baking temperatures on both sides of the steamed and baked object more stable, and realizing precise differential steaming and baking.

[0149] Exemplarily, a preset heating period is a pulse cycle, and its value is very small, and it is difficult to control the first heating device and the second heating device according to time within the heating period. Proportional-integral-derivative control can be adopted for the first heating device and the second heating device to make the control more precise.

[0150] In summary, in this embodiment, the heating duty cycle of the first heating device and the heating duty cycle of the second heating device in the heat preservation mode are obtained; the sum of the heating duty cycles of the heating duty cycle of the first heating device and the heating duty cycle of the second heating device is calculated; according to the sum of the heating duty cycles and the preset heating period, proportional-integral-derivative control is performed on the first heating device and the second heating device. Thus, the actual steaming and baking temperatures on both sides of the steamed and baked object are made more stable, precise differential steaming and baking is realized, and the control precision is improved.

[0151] In another embodiment, the proportional-integral-derivative control of the first heating device and the second heating device according to the sum of the heating duty cycles and the preset heating period in S303 includes:

[0152] If the sum of the heating duty cycles is greater than or equal to one, then within each heating period, the starting time point of the preset heating period is used as the heating starting point of one of the two heating devices, and the ending time point of the preset heating period is used as the heating ending point of the other of the two heating devices.

[0153] If the sum of the heating duty cycles is greater than or equal to one, it means that if the first heating device and the second heating device perform full-power output heating in turn, the time used for each full-power output heating by both of them has been greater than or equal to the preset heating period.

[0154] In each heating cycle, the starting time point of the preset heating cycle can be used as the heating starting point of one of the two heating devices, and the ending time point of the preset heating cycle can be used as the heating ending point of the other heating device among the two heating devices. That is, at the starting time point of the preset heating cycle, control one of the two heating devices to start heating with full power output; at a heating cycle corresponding to the heating duty ratio of the other heating device offset forward from the ending time point of the preset heating cycle, control the other heating device to start heating with full power output, and at the ending time point of the preset heating cycle, the other heating device just completes heating with full power output.

[0155] Exemplarily, Figure 7 It is a schematic diagram of a heating cycle in which the sum of the heating duty ratios provided by the present application is greater than or equal to one. Wherein, T is the preset heating cycle, T1 is the heating cycle corresponding to the heating duty ratio of one heating device, T2 is the heating cycle corresponding to the heating duty ratio of the other heating device, and △T1 is the overlapping time of the heating cycles corresponding to the heating duty ratios of the two heating devices.

[0156] As Figure 7 shown, at the starting time point of the preset heating cycle, one heating device starts heating first, and at the ending time point of the preset heating cycle, the other heating device ends heating later. Through staggered peak control, the overlapping time of the heating cycles of the two heating devices is minimized. It can better avoid the counter blowing of the heat generated by the first heating device and the second heating device simultaneously in the inner cavity of the cooking chamber, making the actual steaming and baking temperatures on both sides of the steamed and baked object more stable and achieving precise differential steaming and baking.

[0157] In summary, in this embodiment, if the sum of the heating duty ratios is greater than or equal to one, then in each heating cycle, the starting time point of the preset heating cycle is used as the heating starting point of one of the two heating devices, and the ending time point of the preset heating cycle is used as the heating ending point of the other heating device among the two heating devices. Thus, the actual steaming and baking temperatures on both sides of the steamed and baked object are more stable, precise differential steaming and baking is achieved, and the control precision is improved.

[0158] In another embodiment, the present application provides a temperature control method in which the sum of the heating duty ratios is less than one. Figure 8 It is a schematic flow chart of a temperature control method in which the sum of the heating duty ratios provided by the present application is less than one. As Figure 8 shown, the proportional-integral-derivative control of the first heating device and the second heating device according to the sum of the heating duty ratios and the preset heating cycle in S303 includes:

[0159] S401. If the sum of the heating duty ratios is less than one, calculate a first difference by using the sum of the heating duty ratios and the preset heating cycle.

[0160] If the sum of the heating duty cycles is less than one, it indicates that if the first heating device and the second heating device perform full-power output heating continuously in sequence, the time taken for each full-power output heating of the two is less than the preset heating period, and during the remaining time of the preset heating period, both are in a state of no power output.

[0161] The first difference can be calculated based on the sum of the heating duty cycles and the preset heating period, and the first difference is the remaining time of the preset heating period.

[0162] The specific calculation method is shown in the following formula (1):

[0163] △T = T×(1 - θ) (1)

[0164] Where, △T is the first difference, T is the preset heating period, and θ is the sum of the heating duty cycles.

[0165] S402. Calculate the second difference based on the first difference.

[0166] To make the full-power output heating of the first heating device and the second heating device in sequence more balanced, the second difference can be calculated based on the first difference.

[0167] Exemplarily, take half of the first difference as the second difference; it is also possible to split the first difference according to the ratio of the duty cycles based on the heating duty cycle of the first heating device and the heating duty cycle of the first heating device to obtain the second difference. The method of calculating the second difference is not limited herein.

[0168] S403. Control the first heating device and the second heating device to perform heating in sequence with the second difference as the interval time.

[0169] Combined with the method of calculating the second difference not limited in the above steps, the solution of taking the second difference calculated based on the first difference as the interval time is within the protection scope of this application.

[0170] The following takes taking half of the first difference as the second difference as an example to explain and illustrate the sequential control of the first heating device and the second heating device for heating.

[0171] Exemplarily, Figure 9 is a schematic diagram of the heating period when the sum of the heating duty cycles provided by this application is less than one. Where, △T2 is the second difference.

[0172] As Figure 9As shown, at the starting time point of the preset heating cycle, first control a heating device to output heat at full power. After the heating is completed and after an interval of the second difference in duration, then control another heating device to output heat at full power. After the heating is completed and after an interval of the second difference in duration, the entire heating cycle is completed, and then enter the next heating cycle.

[0173] In this way, by setting the interval time, the first heating device and the second heating device are heated in sequence, the heating control is more balanced, and there is no overlapping time for the heating cycles. It avoids the counter blowing of the heat generated simultaneously by the first heating device and the second heating device in the inner cavity of the baking chamber, making the actual baking and steaming temperatures on both sides of the baked and steamed object more stable, and achieving precise differential baking and steaming.

[0174] In summary, in this embodiment, if the sum of the heating duty cycles is less than one, calculate the first difference using the sum of the heating duty cycles and the preset heating cycle; calculate the second difference based on the first difference; use the second difference as the interval time to sequentially control the first heating device and the second heating device for heating. Thus, the actual baking and steaming temperatures on both sides of the baked and steamed object are made more stable, precise differential baking and steaming are achieved, and the control accuracy is improved.

[0175] The following describes a temperature control device, equipment, and storage medium provided by the present application for execution, etc. The specific implementation process and technical effects are as described above, and will not be elaborated below.

[0176] Figure 10 As shown in the schematic diagram of a temperature control device for a steam oven provided by an embodiment of the present application, Figure 8 As shown, the device includes:

[0177] A first acquisition module 1001, configured to acquire input baking and steaming parameters, where the baking and steaming parameters include: a first preset temperature, a second preset temperature, and a preset baking and steaming duration.

[0178] A second acquisition module 1002, configured to acquire the detected temperature of a first temperature sensor and the detected temperature of a second temperature sensor.

[0179] A control module 1003, configured to start a heat preservation mode to complete baking and steaming according to the baking and steaming parameters and a preset heat preservation duration when the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, where, in the heat preservation mode, the first heating device maintains the first preset temperature and the second heating device maintains the second preset temperature.

[0180] Further, the control module 1003 is specifically configured to control the first heating device to enter the heat preservation mode if the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature and the detected temperature of the second temperature sensor is less than the second preset temperature; and control the second heating device to enter the heat preservation mode if the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature and the detected temperature of the first temperature sensor is less than the first preset temperature.

[0181] Further, the control module 1003 is specifically further configured to control the first heating device and the second heating device to enter the heat preservation mode and control the third heating device to stop working if the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature and the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature.

[0182] Further, the control module 1003 is specifically further configured to control the blower to stop working.

[0183] Further, the control module 1003 is specifically further configured to obtain the heating duty cycle of the first heating device and the heating duty cycle of the second heating device in the heat preservation mode; calculate the sum of the heating duty cycles of the first heating device and the second heating device; and perform proportional-integral-derivative control on the first heating device and the second heating device according to the sum of the heating duty cycles and the preset heating period.

[0184] Further, the control module 1003 is specifically further configured to, if the sum of the heating duty cycles is greater than or equal to one, use the start time point of the preset heating period as the heating start point of one of the two heating devices and the end time point of the preset heating period as the heating end point of the other of the two heating devices in each heating period.

[0185] Further, the control module 1003 is specifically further configured to, if the sum of the heating duty cycles is less than one, calculate a first difference by using the sum of the heating duty cycles and the preset heating period; calculate a second difference according to the first difference; and control the first heating device and the second heating device to perform heating in sequence at intervals of the second difference.

[0186] Figure 11 FIG. is a schematic diagram of a control device provided by an embodiment of the present application, and the control device may be a device with computing and processing capabilities.

[0187] The control device includes: a processor 1101 and a storage medium 1102. The processor 1101 and the storage medium 1102 are connected through a bus.

[0188] The storage medium 1102 is used to store programs, and the processor 1101 calls the programs stored in the storage medium 1102 to execute the above method embodiments. The specific implementation manners and technical effects are similar and will not be elaborated here.

[0189] Optionally, the present invention further provides a storage medium, including a program which is used to execute the above method embodiments when being executed by a processor. In several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the units is only a logical function division, and there may be other division manners in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed coupling or direct coupling or communication connection between each other can be through some interfaces. The indirect coupling or communication connection of the devices or units can be in electrical, mechanical or other forms.

[0190] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0191] In addition, in each embodiment of the present invention, the functional units can be integrated in a processing unit, or each unit exists physically alone, or two or more units are integrated in one unit. The above integrated units can be implemented in the form of hardware, or in the form of hardware plus software functional units.

[0192] The above integrated units implemented in the form of software functional units can be stored in a storage medium. The above software functional units are stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to execute some steps of the methods described in each embodiment of the present invention. The foregoing storage medium includes: various media such as a USB flash drive, a mobile hard disk, a read-only memory (English: Read-Only Memory, abbreviated as: ROM), a random access memory (English: Random Access Memory, abbreviated as: RAM), a magnetic disk, or an optical disc that can store program codes.

[0193] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A steam oven, characterized in that, The steam oven includes: a box body, a box door, an inner container, and a control device; the inner container is embedded in the box body; the box body and the box door are connected in an openable and closable manner; A support frame is arranged in the middle of the inner container; a first heating device and a second heating device are respectively arranged at the top and the bottom plate of the inner container; A first temperature sensor is arranged between the support frame and the top of the inner container; a second temperature sensor is arranged between the support frame and the bottom plate of the inner container; The control device is arranged inside the box body and is electrically connected to the first heating device, the second heating device, the first temperature sensor, and the second temperature sensor respectively; wherein, in the heat preservation mode, the first heating device maintains a first preset temperature and the second heating device maintains a second preset temperature; A third heating device is arranged on the surface of the inner container opposite to the box door, the control device is electrically connected to the third heating device, and the third heating device is used for heating in the preheating mode and stops working in the heat preservation mode; A blower is arranged on the surface of the inner container opposite to the box door, the control device is electrically connected to the blower, and the control device is used for controlling the third heating device and the blower to start in the preheating mode and controlling the third heating device and the blower to close in the heat preservation mode; Wherein, the control device is used for obtaining the heating duty cycle of the first heating device and the heating duty cycle of the second heating device in the heat preservation mode; calculating the sum of the heating duty cycles of the first heating device and the heating duty cycle of the second heating device; if the sum of the heating duty cycles is greater than or equal to one, then in each heating cycle, taking the starting time point of the preset heating cycle as the heating starting point of one of the two heating devices, and taking the ending time point of the preset heating cycle as the heating ending point of the other heating device of the two heating devices; if the sum of the heating duty cycles is less than one, calculating a first difference value by using the sum of the heating duty cycles and the preset heating cycle; calculating a second difference value according to the first difference value; and controlling the first heating device and the second heating device to heat in turn at intervals of the second difference value.

2. A temperature control method for a steam oven, characterized in that, A control device applied to the steam oven according to claim 1, the method includes: Obtaining input steaming and baking parameters, wherein the steaming and baking parameters include: a first preset temperature, a second preset temperature, and a preset steaming and baking duration; Obtaining the detected temperature of the first temperature sensor and the detected temperature of the second temperature sensor; When the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, starting the heat preservation mode to complete steaming and baking according to the steaming and baking parameters and the preset heat preservation duration, wherein in the heat preservation mode, the first heating device maintains the first preset temperature and the second heating device maintains the second preset temperature; A third heating device is arranged on the surface of the inner container opposite to the box door, and the control device is electrically connected to the third heating device; When the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, starting a heat preservation mode according to the steaming and baking parameters and a preset heat preservation duration, includes: If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature, and the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, then control the first heating device and the second heating device to enter the heat preservation mode, and control the third heating device to stop working; After starting the heat preservation mode according to the steaming and baking parameters and the preset heat preservation duration, further includes: Obtain the heating duty cycles of the first heating device and the second heating device in the heat preservation mode; Calculate the sum of the heating duty cycles of the first heating device and the second heating device; If the sum of the heating duty cycles is greater than or equal to one, then in each heating cycle, use the start time point of the preset heating cycle as the heating start point of one of the two heating devices, and use the end time point of the preset heating cycle as the heating end point of the other of the two heating devices; If the sum of the heating duty cycles is less than one, calculate a first difference using the sum of the heating duty cycles and the preset heating cycle; calculate a second difference according to the first difference; use the second difference as the interval time, and sequentially control the first heating device and the second heating device to perform heating.

3. The method according to claim 2, characterized in that, When the detected temperatures of the first temperature sensor and the second temperature sensor meet the preheating conditions, starting a heat preservation mode according to the steaming and baking parameters and a preset heat preservation duration, includes: If the detected temperature of the first temperature sensor is greater than or equal to the first preset temperature, and the detected temperature of the second temperature sensor is less than the second preset temperature, then control the first heating device to enter the heat preservation mode; If the detected temperature of the second temperature sensor is greater than or equal to the second preset temperature, and the detected temperature of the first temperature sensor is less than the first preset temperature, then control the second heating device to enter the heat preservation mode.

4. The method according to claim 3, wherein A blower is provided on the inner surface of the inner container relative to the surface of the door; the control device is electrically connected to the blower; After controlling the first heating device and the second heating device to enter the heat preservation mode, further includes: Control the blower to stop working.

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