Cooking utensil control method and cooking utensil

Abstract

The invention discloses a control method of a cooking utensil and the cooking utensil, the cooking utensil comprises a cooking space, a heating device and a weighing device, the cooking process of the cooking utensil comprises a temperature rise stage, and the control method comprises the steps that before the temperature rise stage starts, the detection value of the weighing device is recorded as the initial weight; enabling the cooking process to enter a heating stage, and controlling the heating device to work; and acquiring a detection value of the weighing device, and when a difference value obtained by subtracting the detection value of the weighing device from the initial weight is greater than or equal to a first difference value, enabling the cooking process to enter a boiling confirmation stage, and confirming that the food is boiled in the boiling confirmation stage. In the heating stage, whether the food in the cooking space is close to the boiling state or not is judged according to the detection value of the weighing device, the problem of inaccurate detection of a temperature sensor can be avoided, the temperature sensor can be omitted, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of cooking appliances, and more particularly to a control method for a cooking appliance and a cooking appliance using the method. Background Art

[0002] Currently, common cooking appliances generally detect the temperature of the food inside the cooking space by setting one or more groups of temperature sensors, and then regulate the cooking process of the food according to the curve of the food temperature change, and finally complete the cooking of the food.

[0003] However, this control method that completely regulates the cooking process by detecting the food temperature is prone to overflow of the food such as cooking fluids during cooking. If the boiling point temperature of the food cannot be accurately judged, the food is likely to overflow during the cooking process, which not only makes the cooking appliance dirty but also causes food waste, and requires the user to spend a lot of time cleaning, resulting in a poor user experience for the user.

[0004] Therefore, a control method for a cooking appliance and a cooking appliance are needed to at least partially solve the above problems. Summary of the Invention

[0005] A series of simplified concepts are introduced in the Summary of the Invention section, which will be further described in detail in the Detailed Description section. The Summary of the Invention section of the present application does not mean to attempt to define the key features and essential technical features of the claimed technical solution, nor does it mean to attempt to determine the protection scope of the claimed technical solution.

[0006] To at least partially solve the above problems, a first aspect of the present application provides a control method for a cooking appliance. The cooking appliance includes a cooking space for holding food, a heating device for heating the cooking space, and a weighing device. The detected value of the weighing device can be used to represent the weight of the food in the cooking space. The cooking process of the cooking appliance includes a heating stage for heating the food to a boiling or near-boiling temperature. The control method includes:

[0007] Before the start of the heating stage, record the detected value of the weighing device as the initial weight;

[0008] Let the cooking process enter the heating stage and control the heating device to work;

[0009] Obtain the detected value of the weighing device. When the difference between the initial weight and the detected value of the weighing device is greater than or equal to a first difference,

[0010] Let the cooking process enter the boiling confirmation stage and confirm that the food is boiling in the boiling confirmation stage.

[0011] According to the present application, in the heating-up stage, based on the detection value of the weighing device, it is determined whether the food in the cooking space has approached the boiling state by the evaporation rate of water vapor, rather than by detecting whether the temperature approaches the boiling point, thereby avoiding the problem of inaccurate detection by the temperature sensor, and the temperature sensor can be cancelled to reduce costs. Stopping heating for a period of time before approaching the boiling state can reduce the residual heat of the heating device and avoid overflowing of the pot.

[0012] Optionally, the control method further includes:

[0013] In the heating-up stage, first control the heating device to operate at a first heating power. When the difference between the initial weight and the detection value of the weighing device is greater than or equal to a second difference, control the heating device to operate at a second heating power.

[0014] Wherein, the first difference is greater than the second difference, and the first heating power is greater than the second heating power.

[0015] According to the present application, initially heating is performed at a relatively high power to quickly increase the temperature and improve work efficiency. By setting a second difference smaller than the first difference, when the difference between the initial weight and the current weight reaches the second difference, the heating power is reduced, and the heating power is controlled in advance to avoid overflow.

[0016] Optionally, the value range of the second difference is [0.1 g, 0.3 g].

[0017] According to the present application, the range of the second difference is clear and the parameters are reasonable.

[0018] Optionally, the first heating power is configured as [70%, 100%] of the full power of the heating device; and / or

[0019] The second heating power is configured as [50%, 80%] of the full power of the heating device.

[0020] According to the present application, the ranges of the first heating power and the second heating power are clear and the parameters are reasonable.

[0021] Optionally, the value range of the first difference is [0.5 g, 5 g]; and / or the first difference when the cooking task is cooking rice or steaming is greater than the first difference when the cooking task is cooking porridge or making soup.

[0022] According to the present application, the range of the first difference is clear and the parameters are reasonable. When cooking porridge or making soup, it is easier to have the situation of overflowing the pot. Therefore, it is necessary to specifically reduce the value of the first difference to perform more precise and reasonable regulation on the heating process and further avoid overflowing of the pot.

[0023] Optionally, the control method further includes:

[0024] In the temperature rising stage, when the difference between the initial weight and the detected value of the weighing device is greater than or equal to a first difference, control the heating device to stop working for a first stop duration, or reduce the heating power of the heating device, and then enter the boiling confirmation stage of the cooking process, and confirm that the food is boiling in the boiling confirmation stage.

[0025] According to the present application, after the temperature rising stage and before the boiling confirmation stage, allowing the heating device to dissipate heat can further avoid boiling over.

[0026] Optionally, the value range of the first stop duration is [20s, 180s].

[0027] According to the present application, the value of the first stop duration is clear and reasonable.

[0028] Optionally, the control method further includes:

[0029] In the boiling confirmation stage, control the heating device to work periodically with a first period. In each first period, first control the heating device to work for a preset duration, and then control the heating device to stop working for a preset interruption duration;

[0030] Respectively obtain the detected values of the weighing device before and after the heating device works in each first period to judge the weight change of the food before and after heating;

[0031] When the weight change in N consecutive first periods is all decreasing, it is determined that the food is boiling, where N is a positive integer.

[0032] According to the present application, in the boiling confirmation stage, the heating device works periodically, and records the weight change of the food before and after each period to confirm whether it is boiling. It is not necessary to judge whether it is boiling by detecting the temperature. After continuously decreasing N times, it is confirmed that it is boiling, avoiding misjudgment of boiling caused by external interference factors resulting in weight decrease, and further reducing errors.

[0033] Optionally, the value range of the preset maintenance duration is [5s, 20s]; and / or

[0034] The value range of the preset interruption duration is [10s, 50s].

[0035] According to the present application, the ranges of the preset maintenance duration and the preset interruption duration are clear, and the parameters are reasonable.

[0036] Optionally, the preset maintenance duration when the cooking task is cooking rice or steaming is greater than the preset maintenance duration when the cooking task is cooking porridge or soup; and / or

[0037] When the cooking task is cooking rice or steaming, the preset maintenance duration is less than the preset interruption duration when the cooking task is cooking porridge or stewing soup.

[0038] According to the present application, it is easier to overflow the pot when cooking porridge or stewing soup. Therefore, it is necessary to specifically change the preset maintenance duration and the value of the preset maintenance duration to more finely and reasonably control the heating process and further avoid overflowing the pot.

[0039] Optionally, N is 1, 2 or 3.

[0040] According to the present application, the value of N is clearly reasonable.

[0041] Optionally, the cooking process of the cooking appliance further includes a boiling maintenance stage after the boiling confirmation stage, and the control method further includes:

[0042] In the boiling maintenance stage, controlling the heating device to work periodically with a second period;

[0043] Dividing the boiling maintenance stage into a plurality of consecutive working periods, wherein, taking a preset number of the second periods as one working period, or taking a period with a preset duration as one working period;

[0044] Obtaining the detection value m1 of the weighing device at the start of each working period, and the detection value m2 of the weighing device at the end of each working period;

[0045] Calculating the weight change value of m1 minus m2;

[0046] Adjusting the heating duty cycle of the second period according to the relationship between the weight change value and a preset weight difference. According to the present application, in the boiling maintenance stage, according to the change of the detection value of the weighing device before and after each working period, that is, the water evaporation situation, to determine the heating duty cycle of the second period, that is, to adjust the average heating power in the boiling maintenance stage to ensure that the food boils sufficiently.

[0047] Optionally, the adjusting the heating duty cycle of the second period according to the relationship between the weight change value and a preset weight difference includes:

[0048] When the weight change value is lower than the preset weight difference, increasing the heating duty cycle of the second period;

[0049] When the weight change value is higher than the preset weight difference, decreasing the heating duty cycle of the second period.

[0050] According to the present application, during the boiling maintenance stage, the heating process is regulated based on the detection value of the weighing device. When more water evaporates, it indicates excessive heating, so the heating duty cycle is reduced to avoid boiling over. When less water evaporates, it indicates insufficient heating, so the heating duty cycle is increased to make the food boil sufficiently.

[0051] Optionally, the value range of the preset duration is [1 min, 6 min]; and / or

[0052] the value range of the preset weight difference is [0.2 g, 1 g].

[0053] According to the present application, the preset duration and the range of the preset weight difference are clearly defined and the parameters are reasonable.

[0054] Optionally, the preset duration when the cooking task is cooking rice or steaming is less than the preset duration when the cooking task is cooking porridge or stewing soup.

[0055] According to the present application, boiling over is more likely to occur when cooking porridge or stewing soup. Therefore, it is necessary to specifically increase the duration of the second cycle to regulate the heating process more precisely and reasonably, further avoiding boiling over.

[0056] Optionally, the control method further includes:

[0057] When the duration of the boiling maintenance stage reaches the preset boiling maintenance duration, end the boiling maintenance stage.

[0058] According to the present application, there is a clear control for ending the boiling maintenance stage.

[0059] Optionally, the cooking process of the cooking appliance further includes a rice simmering stage after the boiling maintenance stage, and the control method further includes:

[0060] Determining the heating power of the heating device in the rice simmering stage according to the average power of the heating device in the boiling maintenance stage.

[0061] According to the present application, determining the heating power of the rice simmering stage by referring to the average power of the heating device in the boiling maintenance stage is beneficial to avoiding the situations of excessive power, dry and hard or burnt food.

[0062] Optionally, the determining the heating power of the heating device in the rice simmering stage according to the average power of the heating device in the boiling maintenance stage includes:

[0063] Making the heating power of the heating device in the rice simmering stage be the product of the average power of the heating device in the boiling maintenance stage and a preset percentage.

[0064] According to the present application, there is a clear correspondence relationship between the heating power in the rice simmering stage and the average power in the boiling maintenance stage.

[0065] Optionally, the preset percentage is [10%, 50%].

[0066] According to the present application, the preset percentage range is clear and the parameters are reasonable.

[0067] Optionally, the cooking process of the cooking appliance further includes a water absorption stage before the temperature rising stage, and the control method further includes:

[0068] In the water absorption stage, controlling the heating device to operate for a water absorption heating duration, where the water absorption heating duration is the product of a preset time coefficient and the weight of the food.

[0069] According to the present application, determining the water absorption heating duration by the product of the preset time coefficient and the weight of the food is reasonable and effective.

[0070] Optionally, the control method further includes:

[0071] In the water absorption stage, after the heating device operates for the water absorption heating duration, continue to make the duration of the water absorption stage reach a preset water absorption maintenance duration, then end the water absorption stage and enter the temperature rising stage.

[0072] According to the present application, there is a clear control over the end of the water absorption stage.

[0073] Optionally, the value range of the preset water absorption maintenance duration is [3 min, 25 min].

[0074] According to the present application, the value range of the preset water absorption maintenance duration is clear and the parameters are reasonable.

[0075] Optionally, the preset time coefficient satisfies that when the heating device operates for the water absorption heating duration, the temperature of the food rises by 20 to 40 °C compared with before heating.

[0076] According to the present application, making the temperature of the food 20 to 40 °C higher than the ambient temperature in the water absorption stage, that is, absorbing water in a warm environment, is beneficial to the food to absorb water and improve the taste.

[0077] The second aspect of the present application provides a cooking appliance, including:

[0078] A pot body;

[0079] A pot liner removably arranged in the pot body, and the pot liner includes a cooking space for holding food;

[0080] A heating device arranged in the pot body for heating the cooking space;

[0081] A weighing device is provided on the pot body, and the detected value of the weighing device can be used to characterize the weight of the food in the cooking space; and

[0082] A control device, which is electrically connected to both the heating device and the weighing device, enables the control device to obtain the detected value of the weighing device and control the operation of the heating device,

[0083] wherein the control device is configured to execute the steps of the control method according to any one of the technical solutions in the first aspect.

[0084] According to the present application, both the heating device and the weighing device are connected to the control device, facilitating the control device to regulate the entire cooking process. During the heating-up stage, based on the detected value of the weighing device, it is determined whether the food in the cooking space is approaching the boiling state by the speed of water vapor volatilization, rather than by detecting whether the temperature is approaching the boiling point, thus avoiding the problem of inaccurate detection by the temperature sensor. Stopping heating for a period of time before approaching the boiling state can reduce the residual heat of the heating device and prevent overflow.

[0085] Optionally, the weighing device is configured to weigh the total weight of the cooking appliance and the food; or

[0086] The weighing device is configured to weigh the total weight of the pot liner and the food.

[0087] According to the present application, the weighing device can have various configurations, but the obtained detected values can all be used to characterize the weight of the food in the cooking space. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] The following drawings of the present application are hereby incorporated as part of the present application for understanding the present application. The embodiments of the present application shown in the drawings and their descriptions are used to explain the principles of the present application.

[0089] In the drawings:

[0090] Figure 1 is a schematic diagram of a cooking appliance according to a specific embodiment of the present application;

[0091] Figure 2 is a schematic diagram of the steps of the cooking process of a cooking appliance according to a specific embodiment of the present application;

[0092] Figure 3 is a schematic flow diagram of the heating-up stage of a cooking appliance according to a specific embodiment of the present application;

[0093] Figure 4 is a schematic flow diagram of the boiling confirmation stage of a cooking appliance according to a specific embodiment of the present application;

[0094] Figure 5 It is a schematic flow diagram of the boiling maintenance stage of a cooking appliance according to a specific embodiment of the present application.

[0095] Description of the reference numerals:

[0096] 10: Cooking pot body

[0097] 11: Cooking container / Inner pot

[0098] 12: Cooking space

[0099] 20: Lid

[0100] 30: Human - machine interaction device

[0101] 100: Cooking appliance

[0102] S201: Water absorption stage

[0103] S202: Heating - up stage

[0104] S203: Boiling confirmation stage

[0105] S204: Boiling maintenance stage

[0106] S205: Rice simmering stage

[0107] S206: Heat preservation stage Specific embodiment

[0108] In the following description, numerous specific details are given to provide a more thorough understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without one or more of these details. In other instances, in order to avoid confusion with the present application, some well - known technical features are not described.

[0109] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should also be understood that when the terms "comprise" and / or "include" are used in this specification, they specify the presence of the described features, wholes, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components, and / or their combinations.

[0110] Ordinal numbers such as "first" and "second" cited in this application are merely identifiers and do not have any other meanings, such as a specific order, etc. Moreover, for example, the term "first component" does not imply the existence of a "second component" by itself, and the term "second component" does not imply the existence of a "first component" by itself.

[0111] It should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer" and similar expressions used herein are for illustrative purposes only and not restrictive.

[0112] This application provides a control method for a cooking appliance and a cooking appliance adopting the control method.

[0113] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings.

[0114] As Figure 1 shown, in a specific embodiment, the cooking appliance 100 according to the present application may include a pot body 10 and a lid body 20. Generally, a cooking container 11 (such as a pot liner) is provided inside the pot body 10. The pot body 10 may have a storage portion in a cylindrical shape (or other shapes), and the pot liner 11 can be freely placed into or taken out from the storage portion to facilitate the cleaning of the pot liner 11. The pot liner 11 is made of a metal material and is configured as a rotating body formed by a pot wall with an opening and an inner cavity. The capacity of the pot liner 11 is usually below 6L. For example, the capacity of the pot liner 11 can be 2L or 4L, etc.

[0115] The lid body 20 can be pivotally connected to the pot body 10 through a pivot shaft for covering the pot body 10. When the lid body 20 covers the pot body 10, a cooking space 12 is formed between the lid body 20 and the pot liner 11. It can be understood that the cooking space 12 is the internal space of the cooking container 11 for containing ingredients.

[0116] The cooking appliance 100 includes a heating device (not shown). The heating device (such as a heating plate, an electromagnetic heating component, etc.) is usually provided at the bottom of the pot body 10, below the pot liner 11. The heating device is used to heat the pot liner 11 and the ingredients therein, thereby realizing the cooking function.

[0117] The cooking appliance 100 further includes a weighing device (not shown), and the detected value of the weighing device can be used to characterize the weight of the food in the cooking space. The weighing device can be configured as a gravity sensor installed at the outer bottom of the cooking pot body 10. When the cooking appliance 100 is placed on the workbench surface, the gravity sensor contacts the workbench surface and is used to detect the total weight of the cooking appliance 100 and the food in the cooking space 12. Generally, the weight of the cooking appliance 100 is basically unchanged, and the weight of the food is the detected value of the weighing device minus the weight of the cooking appliance 100. Alternatively, the weighing device can also be configured as a gravity sensor installed at the inner bottom of the cooking pot body 10. The gravity sensor contacts the lower end (such as the bottom surface) of the inner pot 11 and is used to detect the total weight of the inner pot 11 and the food in the cooking space 12. Generally, the weight of the inner pot 11 is basically unchanged, and the weight of the food is the detected value of the weighing device minus the weight of the inner pot 11. It can be understood that for the above two setting methods of the gravity sensor, the weight of the food can be obtained through the detected value of the weighing device.

[0118] In addition, the cooking appliance 100 further includes a control device (not shown), and the control device is used to implement the cooking control of the cooking appliance 100. The control device can be, for example, a micro control unit (MCU). The control device is electrically connected to both the heating device and the weighing device, so that the heating device can obtain the detected value of the weighing device and can control the heating device to work.

[0119] The cooking appliance 100 usually further includes a human-machine interaction device 30. The human-machine interaction device 30 is usually arranged on the outer side of the cooking pot body 10 and is connected to the control device. The human-machine interaction device 30 can facilitate the user's operation and prompt the user with information related to the cooking process.

[0120] It should be noted that although some structures of the cooking appliance 100 are schematically described at this time, these enumerations are only exemplary and cannot be used as a limitation on the structure of the cooking appliance 100 in the embodiments of the present application.

[0121] Specifically, as Figure 2As shown, the cooking process of the cooking appliance 100 (such as the process of cooking rice or steaming) may sequentially include six stages: a water absorption stage S201, a heating-up stage S202, a boiling confirmation stage S203, a boiling maintenance stage S204, a rice simmering stage S205, and a heat preservation stage S206. In the water absorption stage S201, the ingredients fully absorb water to improve the taste. In the heating-up stage S202, the food inside the cooking space 12 is heated to a temperature close to boiling. After the boiling confirmation stage S203 further judges and confirms the boiling state, then in the boiling maintenance stage S204, the boiling is maintained to basically cook the ingredients. The rice simmering stage S205 is used to dry the remaining free water and further cook the ingredients. Finally, in the heat preservation stage S206, heat is preserved so that the user can eat hot food. When the cooking appliance 100 executes the cooking functions of cooking porridge or making soup, the rice simmering stage S205 is omitted. It can be understood that the cooking process of the cooking appliance 100 is specifically controlled by the control device of the cooking appliance 100, and various control methods are also executed by the control device.

[0122] In the water absorption stage S201, the control device controls the heating device to work for the water absorption heating duration, where the water absorption heating duration is set as the product of a preset time coefficient and the weight of the food, that is, the value of the water absorption heating duration is determined by the detection value of the weighing device, which is simple and efficient. Preferably, the preset time coefficient is set to satisfy that when the heating device works for the water absorption heating duration, the food is heated and raised in temperature by 20 to 40 °C compared to before heating. That is, by setting the water absorption heating duration as the product of the preset time coefficient and the weight of the food, it is ensured that the food is heated and raised in temperature by 20 to 40 °C while absorbing water.

[0123] In the water absorption stage, after the heating device works for the water absorption heating duration, the continuous duration of the water absorption stage S201 is continued until it reaches the maintaining water absorption duration, and then the water absorption stage S201 ends and the heating-up stage S202 is entered. The value range of the preset maintaining water absorption duration is preferably set to [3 min, 25 min], for example, set to 12 min. By setting the maintaining water absorption duration, further water absorption can be achieved in the water absorption stage S201, which is beneficial to improving the taste of the rice.

[0124] As Figure 3As shown, before the start of the temperature-rising stage S202, the detection value of the weighing device at this time (when the water absorption stage ends) is recorded as the initial weight, and then the temperature-rising stage S202 is entered. After entering the temperature-rising stage S202, preferably, the control device first controls the heating device to work at the first temperature-rising power. During this period, the control device obtains the detection value of the weighing device. When the difference between the initial weight and the current detection value of the weighing device is greater than or equal to the second difference, the control device controls the heating device to work at the second temperature-rising power. Among them, the first temperature-rising power is greater than the second temperature-rising power. The first temperature-rising power is preferably configured as [70%, 100%] of the full power of the heating device. For example, it is configured as 100% of the full power. The second temperature-rising power can be configured as [50%, 80%] of the full power of the heating device. For example, it is configured as 70% of the full power.

[0125] In the temperature-rising stage S202, first, a large first temperature-rising power is used to achieve the effect of rapid temperature rise. When the difference between the initial weight and the current weight, that is, the weight volatilized by water vapor reaches the second difference, it indicates that the food already has a suitable temperature. At this time, the heating power of the heating device is reduced to the second temperature-rising power, which is relatively smaller than the first temperature-rising power. Reducing the power in time can avoid the situation of overheating and overflow.

[0126] Furthermore, during the process of the heating device working at the second temperature-rising power, the detection value of the weighing device is obtained. When the difference between the initial weight and the current detection value of the weighing device is greater than or equal to the first difference, the temperature-rising stage S202 ends, and the cooking process enters the boiling confirmation stage S203. Among them, the first difference is greater than the second difference. The value range of the second difference is preferably set as [0.1g, 0.3g]. For example, the value is 0.2g. The value range of the first difference is preferably set as [0.5g, 5g). For example, the value is 0.5g.

[0127] In the temperature-rising stage S202, when the difference between the initial weight and the current weight, that is, the weight volatilized by water vapor reaches the first difference, it indicates that the temperature of the food material further rises and is close to boiling. The control device immediately controls the heating device to stop working to avoid overflow. Judging whether the food in the cooking space 12 is close to the boiling state by the amount of water vapor volatilized, rather than by detecting whether the temperature is close to the boiling point, can avoid the problem of inaccurate detection by the temperature sensor.

[0128] Preferably, the first difference when the cooking task is rice cooking or steaming is greater than the first difference when the cooking task is porridge cooking or soup cooking. Since it is easier to have the situation of pot overflow when cooking porridge or soup, it is necessary to specifically reduce the value of the first difference to avoid the food boiling and the situation of pot overflow in the temperature-rising stage S202.

[0129] Further, in the temperature-rising stage, when the difference between the initial weight and the detected value of the weighing device is greater than or equal to the first difference, the heating device is controlled to stop working for a first stop duration, or the heating power of the heating device is reduced (for example, the heating device is controlled to work with reduced heating power for a first duration, and the first duration can be equal to the first stop duration), and then the temperature-rising stage S202 is ended, and the cooking process enters the boiling confirmation stage S203. Among them, the value range of the first stop duration is preferably set to [20s, 180s], for example, the value is 60s. In the boiling confirmation stage S203, the boiling state of the food can be further judged and confirmed. Stopping the heating device from working for a period of time before confirming boiling can allow the heating device to dissipate heat, thereby preventing the food from overflowing the pot.

[0130] As Figure 4 shown, in the boiling confirmation stage S203, preferably, the control device controls the heating device to work periodically with a first period. For example, in each first period, the control device first controls the heating device to work for a preset duration, and then controls the heating device to stop working for a preset interruption duration. Among them, the value range of the preset maintenance duration is preferably set to [5s, 20s], for example, the value is 10s, and the value range of the preset interruption duration is preferably set to [10s, 50s], for example, the value is 20s.

[0131] Further, the control device respectively obtains the detected values of the weighing device before and after the heating device works in each first period to judge the change in the weight of the food before and after the heating device works for the preset duration. When the weight change conditions in consecutive N first periods are all decreasing, it can be determined that the food is boiling, and thus the boiling confirmation stage S203 is ended, and the boiling maintenance stage S204 is entered. Among them, N is set as a positive integer, and N is preferably set to 1, 2 or 3, for example, it is set to 2.

[0132] In the boiling confirmation stage S203, the heating device is controlled to work periodically, and the change in the weight of the food before and after each period is recorded, that is, whether the water vapor continues to volatilize to further confirm whether the food is boiling, and it is not necessary to judge whether it is boiling by detecting the temperature. That is, when the food is at or near the boiling temperature, it will boil immediately and the water will evaporate with a little heating. Confirming the boiling state of the food after the weight has become smaller continuously for multiple times can avoid misjudging boiling caused by external interference factors that cause the weight to become smaller.

[0133] Preferably, the preset duration for maintaining when the cooking task is cooking rice or steaming is greater than the preset duration for maintaining when the cooking task is cooking porridge or stewing soup. Correspondingly, the preset duration for maintaining when the cooking task is cooking rice or steaming is less than the preset interruption duration when the cooking task is cooking porridge or stewing soup. Since it is easier to have the pot overflow when cooking porridge or stewing soup, it is necessary to specifically reduce the heating duration in each cycle or increase the duration of stopping heating to further avoid the pot from overflowing.

[0134] As Figure 5 shown, in the boiling maintenance stage S204, preferably, the control device controls the heating device to work periodically with a second cycle. Further, the boiling maintenance stage is divided into several consecutive working periods, where one working period is a preset number of second cycles, or one working period is a period of preset duration; obtain the detection value m1 of the weighing device at the start of each working period, and the detection value m2 of the weighing device at the end of each working period; calculate the weight change value of m1 minus m2;

[0135] Further, adjust the heating duty cycle of the second cycle according to the relationship between the weight change value of m1 minus m2 and the preset weight difference. For example, when the weight change value is lower than the preset weight difference, increase the heating duty cycle of the second cycle; when the weight change value is higher than the preset weight difference, decrease the heating duty cycle of the second cycle; when the weight change value is equal to the preset weight difference, the heating duty cycle of the second cycle remains unchanged.

[0136] According to the present application, in the boiling maintenance stage S204, the control device controls the heating device to work periodically with a second cycle, records the change value of the food weight before and after each working period to compare with the preset value, and adjusts the duty cycle of the heating stage in the second cycle according to the comparison result, that is, indirectly adjusts the average heating power of the heating device in the entire boiling maintenance stage S204, avoiding overheating and causing the pot to overflow, and also avoiding insufficient cooking due to too little heating.

[0137] In the boiling maintenance stage S204, the value range of the preset duration is preferably set to [1 min, 6 min], for example, the value is 2 min. The value range of the preset weight difference is preferably set to [0.2 g, 1 g], for example, it is set to 0.5 g. Preferably, the preset duration when the cooking task is cooking rice or steaming is less than the preset duration when the cooking task is cooking porridge or stewing soup. Since it is easier to have the pot overflow when cooking porridge or stewing soup, it is necessary to specifically increase the preset duration, that is, indirectly reduce the average heating power to avoid the pot from overflowing in the boiling maintenance stage S204.

[0138] Further, when the duration of the boiling maintenance stage S204 reaches the preset boiling maintenance duration, end the boiling maintenance stage S204 and enter the rice simmering stage S205.

[0139] Further, in the rice simmering stage S205, the heating power of the heating device in the rice simmering stage S205 is determined according to the average power of the heating device in the boiling maintenance stage S204. For example, the heating power of the heating device in the rice simmering stage S205 can be set as the product of the average power of the heating device in the boiling maintenance stage S204 and a preset percentage, where the preset percentage is preferably set to [10%, 50%], for example, set to 30%. The average power of the heating device in the boiling maintenance stage S204 is related to the total amount of the ingredients. By referring to the average power of the heating device in the boiling maintenance stage S204 to determine the heating power in the rice simmering stage S205, it is beneficial to avoid overheating in the rice simmering stage S205. The rice simmering stage S205 lasts for a predetermined rice simmering duration, for example.

[0140] After the rice simmering stage S205 ends, through the heat preservation stage S206, the entire cooking process finally ends.

[0141] The processes and steps described in all the above preferred embodiments are merely examples. Unless adverse effects occur, various processing operations can be performed in an order different from the order of the above processes. The order of the steps of the above processes can also be increased, combined or deleted according to actual needs.

[0142] Unless otherwise defined, the technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the technical field of the present application. The terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application. The features described in one embodiment herein can be applied to another embodiment alone or in combination with other features, unless the feature is not applicable or otherwise stated in that other embodiment.

[0143] The present application has been illustrated by the above embodiments. However, it should be understood that the above embodiments are only for the purpose of exemplification and illustration, and the present application is not limited to the above embodiments. According to the teachings of the present application, more variations and modifications can be made, and these variations and modifications all fall within the scope claimed by the present application.

Claims

1. A control method for a cooking appliance, the cooking appliance including a cooking space for containing food, a heating device for heating the cooking space, and a weighing device, a detected value of the weighing device being usable to characterize a weight of the food in the cooking space, a cooking process of the cooking appliance including a temperature rising stage for bringing the food to a boiling or nearly boiling temperature, characterized in that, The control method includes: Before the start of the heating-up stage, record the detected value of the weighing device as the initial weight; Make the cooking process enter the heating-up stage and control the heating device to work; Obtain the detected value of the weighing device. When the difference between the initial weight and the detected value of the weighing device is greater than or equal to the first difference, Make the cooking process enter the boiling confirmation stage and confirm that the food is boiling in the boiling confirmation stage.

2. The control method according to claim 1, characterized in that, The control method further includes: In the heating-up stage, first control the heating device to work at the first heating power. When the difference between the initial weight and the detected value of the weighing device is greater than or equal to the second difference, control the heating device to work at the second heating power, wherein, the first difference is greater than the second difference, and the first heating power is greater than the second heating power.

3. The control method according to claim 2, wherein the value range of the second difference is [0.1g, 0.3g].

4. The control method according to claim 2, wherein the first heating power is configured as [70%, 100%] of the full power of the heating device; and / or the second heating power is configured as [50%, 80%] of the full power of the heating device.

5. The control method according to claim 1, wherein the value range of the first difference is [0.5g, 5g]; and / or the first difference when the cooking task is cooking rice or steaming is greater than the first difference when the cooking task is cooking porridge or stewing soup.

6. The control method according to claim 1, wherein The control method further includes: In the heating-up stage, when the difference between the initial weight and the detected value of the weighing device is greater than or equal to the first difference, control the heating device to stop working for the first stop duration, or reduce the heating power of the heating device, and then make the cooking process enter the boiling confirmation stage and confirm that the food is boiling in the boiling confirmation stage.

7. The control method according to claim 6, characterized in that, The value range of the first stop duration is [20s, 180s].

8. The control method according to claim 1, characterized in that, The control method further includes: In the boiling confirmation stage, control the heating device to work periodically at the first period. In each first period, first control the heating device to work for a preset duration, and then control the heating device to stop working for a preset interruption duration; Obtain the detected values of the weighing device before and after the heating device works in each first period respectively to judge the weight change of the food before and after heating; When the weight change conditions in consecutive N first periods are all decreasing, determine that the food is boiling, where N is a positive integer.

9. The control method according to claim 8, wherein the value range of the preset duration is [5s, 20s]; and / or the value range of the preset interruption duration is [10s, 50s].

10. The control method according to claim 8, wherein the preset duration when the cooking task is cooking rice or steaming is greater than the preset duration when the cooking task is cooking porridge or stewing soup; and / or The preset interruption duration when the cooking task is cooking rice or steaming is less than the preset interruption duration when the cooking task is cooking porridge or stewing soup.

11. The control method according to claim 8, wherein N is 1, 2, or 3.

12. The control method according to claim 1, characterized in that The cooking process of the cooking appliance further includes a boiling maintenance stage after the boiling confirmation stage, and the control method further includes: In the boiling maintenance stage, controlling the heating device to work periodically with a second period; Dividing the boiling maintenance stage into a plurality of consecutive working periods, where one working period is a preset number of the second periods, or one working period is a period of a preset duration; Obtaining the detection value m1 of the weighing device at the start of each working period, and the detection value m2 of the weighing device at the end of each working period; Calculating the weight change value of m1 minus m2; Adjusting the heating duty cycle of the second period according to the relationship between the weight change value and a preset weight difference.

13. The control method according to claim 12, characterized in that, The adjusting the heating duty cycle of the second period according to the relationship between the weight change value and a preset weight difference includes: When the weight change value is lower than the preset weight difference, increasing the heating duty cycle of the second period; When the weight change value is higher than the preset weight difference, decreasing the heating duty cycle of the second period.

14. The control method according to claim 12, wherein The value range of the preset duration is [1 min, 6 min]; and / or The value range of the preset weight difference is [0.2 g, 1 g].

15. The control method according to claim 12, characterized in that, The preset duration when the cooking task is cooking rice or steaming is less than the preset duration when the cooking task is cooking porridge or stewing soup.

16. The control method according to claim 12, wherein The control method further includes: When the duration of the boiling maintenance stage reaches a preset boiling maintenance duration, ending the boiling maintenance stage.

17. The control method according to claim 16, wherein The cooking process of the cooking appliance further includes a rice simmering stage after the boiling maintenance stage, and the control method further includes: Determining the heating power of the heating device in the rice simmering stage according to the average power of the heating device in the boiling maintenance stage.

18. The control method according to claim 17, wherein The determining the heating power of the heating device in the rice simmering stage according to the average power of the heating device in the boiling maintenance stage includes: Making the heating power of the heating device in the rice simmering stage be the product of the average power of the heating device in the boiling maintenance stage and a preset percentage.

19. The control method according to claim 18, wherein The preset percentage is [10%, 50%].

20. The control method according to any one of claims 1 to 19, characterized in that, The cooking process of the cooking appliance further includes a water absorption stage before the temperature rising stage, and the control method further includes: In the water absorption stage, controlling the heating device to work for a water absorption heating duration, where the water absorption heating duration is the product of a preset time coefficient and the weight of the food.

21. The control method according to claim 20, characterized in that, The control method further includes: In the water absorption stage, when the heating device works for the water absorption heating duration, continuing to make the duration of the water absorption stage reach a preset water absorption maintenance duration, then ending the water absorption stage and entering the temperature rising stage.

22. The control method according to claim 21, wherein The value range of the preset water absorption duration is [3 min, 25 min].

23. The control method according to claim 20, wherein The preset time coefficient satisfies that when the heating device works for the water absorption heating duration, the temperature of the food rises by 20 to 40 °C compared with before heating.

24. A cooking appliance, characterized in that, Comprising: A pot body; A pot liner removably disposed in the pot body, the pot liner including a cooking space for containing food; A heating device disposed in the pot body for heating the cooking space; A weighing device disposed in the pot body, and the detected value of the weighing device can be used to represent the weight of the food in the cooking space; And A control device electrically connected to both the heating device and the weighing device, so that the control device can obtain the detected value of the weighing device and can control the heating device to work, wherein the control device is configured to perform the steps of the control method according to any one of claims 1 to 23.

25. The cooking appliance according to claim 24, wherein the weighing device is configured to weigh the total weight of the cooking appliance and the food; or the weighing device is configured to weigh the total weight of the pot liner and the food.

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