A cooking appliance, a control method and device for a cooking appliance

Abstract

The present invention discloses a cooking appliance, a control method and a control device for the cooking appliance. The control method for the cooking appliance includes: after receiving a cooking instruction, controlling a heating element to preheat rice in the cooking appliance; obtaining heating parameters related to the preheating; determining a heating rate of the rice-water mixture during the preheating according to the heating parameters; and determining the type of the rice according to the heating rate of the rice-water mixture. Thus, the type of the rice can be automatically identified during the cooking process, without the need to set different selection buttons for different types of rice.

Description

Technical Field

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

[0002] Due to the different types and grades of rice produced across the country, in order to better match different types of rice and improve the cooking effect when developing the rice cooking function, many cooking appliances on the market usually set rice type selection buttons at the interface selection to enhance the special rice cooking function. However, for the developers, the above approach will greatly increase the product development cost and bring many difficulties to the R & D work. Moreover, too many interface function selections are also a burden for users. Older users may not be adapted to the complex interface operations, reducing the user experience. Summary of the Invention

[0003] In view of this, embodiments of the present invention provide a cooking appliance, a control method and a device for the cooking appliance to solve the problem of setting different selection buttons for different types of rice.

[0004] According to a first aspect, an embodiment of the present invention provides a control method for a cooking appliance, including the following steps: after receiving a cooking instruction, controlling a heating element to preheat a rice-water mixture in the cooking appliance; obtaining heating parameters related to the preheating; determining a heating rate of the rice-water mixture during the preheating according to the heating parameters; and determining the type of the rice according to the heating rate of the rice-water mixture.

[0005] The control method for the cooking appliance provided by the embodiment of the present invention controls a heating element to preheat a rice-water mixture in the cooking appliance after receiving a cooking instruction; obtains heating parameters related to the preheating; determines a heating rate of the rice-water mixture during the preheating according to the heating parameters; and determines the type of the rice according to the heating rate of the rice-water mixture. Thus, the type of the rice can be automatically identified during the cooking process without setting different selection buttons for different types of rice.

[0006] Specifically, the determining the type of the rice according to the heating rate of the rice-water mixture includes: when the heating rate is greater than or equal to a preset first speed threshold, determining that the rice is the first type of rice; and when the heating rate is less than the first speed threshold, determining that the rice is the second type of rice.

[0007] Specifically, the heating parameters include a preheating temperature and a preheating duration corresponding to the end time of the preheating; determining the heating rate of the rice-water mixture during the preheating according to the heating parameters includes: calculating the ratio of the preheating temperature to the preheating duration to obtain the heating rate of the rice-water mixture.

[0008] Specifically, controlling the heating element to preheat the rice in the cooking appliance includes: controlling the heating element to heat to the preheating temperature; or, controlling the heating element to heat for the preheating duration.

[0009] Specifically, after determining the type of the rice according to the heating rate of the rice-water mixture, it further includes: when the rice is the first type of rice, cooking with a first pressure; when the rice is the second type of rice, cooking with a second pressure, where the second pressure is greater than the first pressure.

[0010] Specifically, cooking with the first pressure includes: controlling the heating element to heat at a preset first duty cycle to maintain the rice within a preset first temperature range, and obtaining a first actual heating duration of the heating element heating at the first duty cycle; when the first actual heating duration is greater than or equal to a preset first theoretical duration, controlling the heating element to heat at a preset second duty cycle to maintain the rice within a preset second temperature range, and obtaining a second actual heating duration of the heating element heating at the second duty cycle; when the second actual heating duration is greater than or equal to a preset second theoretical duration, ending the heating; where the second duty cycle is less than or equal to the first duty cycle; the minimum value of the first temperature range is greater than the maximum value of the second temperature range.

[0011] Specifically, cooking with the second pressure includes: controlling the heating element to heat at a preset third duty cycle to heat the rice to a preset third temperature range; after heating the rice to the third temperature range, controlling the heating element to heat at a preset fourth duty cycle, and obtaining a fourth actual heating duration of the heating element heating at the fourth duty cycle; when the fourth actual heating duration is greater than or equal to a preset fourth theoretical duration, performing air-cooled pressure relief, where the third duty cycle is less than or equal to the first duty cycle; where the minimum value of the third temperature range is 100 °C.

[0012] According to a second aspect, an embodiment of the present invention further provides a control device for a cooking appliance, including a preheating module, an acquisition module, a heating rate determination module, and a rice type determination module; after receiving a cooking instruction, the preheating module is configured to control a heating element to preheat the rice-water mixture in the cooking appliance; the acquisition module is configured to acquire heating parameters related to the preheating; the heating rate determination module is configured to determine a heating rate of the rice-water mixture during the preheating process according to the heating parameters; the rice type determination module is configured to determine the type of rice according to the heating rate of the rice-water mixture.

[0013] According to a third aspect, an embodiment of the present invention provides a cooking appliance, including a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to implement the above control method for the cooking appliance.

[0014] According to a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium storing computer instructions for causing a computer to execute the above control method for the cooking appliance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings. The drawings are schematic and should not be construed as limiting the present invention in any way. In the drawings:

[0016] Figure 1 is a schematic flowchart of the control method for the cooking appliance in Embodiment 1 of the present invention;

[0017] Figure 2 is a schematic flowchart of an example of the control method for the cooking appliance in Embodiment 1 of the present invention;

[0018] Figure 3 is a schematic structural diagram of the control device for the cooking appliance in Embodiment 2 of the present invention;

[0019] Figure 4 is a schematic structural diagram of the cooking appliance in Embodiment 3 of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0021] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0022] Embodiment 1

[0023] Embodiment 1 of the present invention provides a control method for a cooking appliance. Figure 1 It is a schematic flowchart of the control method for the cooking appliance in Embodiment 1 of the present invention. As Figure 1 shown, the control method for the cooking appliance in Embodiment 1 of the present invention includes the following steps:

[0024] S101: After receiving a cooking instruction, control the heating element to preheat the rice-water mixture in the cooking appliance.

[0025] As a specific implementation manner, controlling the heating element to preheat the rice-water mixture in the cooking appliance includes: controlling the heating element to heat to a preset preheating temperature. For example, the preheating temperature can be represented by T1, where 0 < T1 ≤ 50°C.

[0026] As another specific implementation manner, controlling the heating element to preheat the rice-water mixture in the cooking appliance includes: controlling the heating element to heat for the preset preheating duration. Among them, for the same cooking appliance, the heating speed of its heating element is certain, so the preheating duration can be determined according to the preheating temperature.

[0027] More specifically, when controlling the heating element to preheat the rice-water mixture in the cooking appliance, heating is performed at the rated power. This is because the rated power is the maximum power, and starting with the maximum power for heating, the temperature of the rice-water mixture rises quickly.

[0028] S102: Obtain the heating parameters related to the preheating.

[0029] Among them, the heating parameters related to the preheating can be understood as the heating parameters during the preheating time period. The preheating time period includes all the time from the preheating start moment to the preheating end moment, and includes the preheating start moment and the preheating end moment.

[0030] Specifically, the heating parameters include the preheating temperature and the preheating duration corresponding to the end moment of the preheating.

[0031] Exemplarily, the preheating temperature can be the top temperature of the cooking appliance. This is because the bottom temperature of the cooking appliance is obtained by a temperature sensor disposed at the bottom of the cooking appliance, and the bottom temperature of the cooking appliance reflects the temperature of the heating element; the top temperature of the cooking appliance is obtained by a temperature sensor disposed at the top of the cooking appliance, and the top temperature of the cooking appliance reflects the temperature of the water in the cooking appliance. Since when cooking rice, the cooking appliance contains a rice-water mixture, the temperature of the water is approximately the same as the temperature of the rice. Therefore, the top temperature of the cooking appliance reflects the temperature of the rice in the cooking appliance.

[0032] S103: Determine the heating rate of the rice-water mixture during the preheating process according to the heating parameter.

[0033] Specifically, when the heating parameter includes a preheating temperature and a preheating duration corresponding to the end moment of the preheating, the step of determining the heating rate of the rice-water mixture during the preheating process according to the heating parameter includes: calculating the ratio of the preheating temperature to the preheating duration to obtain the heating rate of the rice-water mixture.

[0034] It should be noted that when controlling the heating element to heat to a preset preheating temperature, since the preheating temperature is fixed, the heating rate of the rice-water mixture can be reflected only by the preheating duration. When controlling the heating element to heat for a preset preheating duration, since the preheating duration is fixed, the heating rate of the rice-water mixture can be reflected only by the preheating temperature.

[0035] S104: Determine the type of the rice according to the heating rate of the rice-water mixture.

[0036] Specifically, when the heating rate is greater than or equal to a preset first speed threshold, it is determined that the rice is the first type of rice; when the heating rate is less than the first speed threshold, it is determined that the rice is the second type of rice.

[0037] It should be noted that when controlling the heating element to heat to a preset preheating temperature and using only the preheating duration to reflect the heating rate of the rice-water mixture, when the preheating duration is less than or equal to a preset first duration threshold, it is determined that the rice is the first type of rice; when the preheating duration is greater than the first duration threshold, it is determined that the rice is the second type of rice.

[0038] When the heating element is controlled to heat to a preset preheating time, and only the preheating temperature is used to reflect the heating rate of the rice-water mixture, when the preheating temperature is greater than or equal to a preset first temperature threshold, the rice is determined to be a first type of rice; when the preheating temperature is less than the first temperature threshold, the rice is determined to be a second type of rice. The water absorption of the first type of rice is greater than that of the second type of rice.

[0039] Generally speaking, the better the water absorption of rice, the better the performance of the rice. Therefore, the first type of rice can also be called high-quality rice, and the second type of rice can also be called ordinary rice.

[0040] This is because, it has been found that the water temperature of the first type of rice rises faster during the preheating process than that of the second type of rice. The reason is that the first type of rice has better water absorption than the second type of rice. Under the premise that the amount of water and the amount of rice in the cooking utensils containing the first type of rice and the cooking utensils containing the second type of rice are the same, during the preheating process, since the first type of rice has better water absorption than the second type of rice, the amount of residual water in the cooking utensils containing the first type of rice is less than that in the cooking utensils containing the second type of rice. Furthermore, because the amount of residual water is small, under the condition of the same heating power, the cooking utensils containing the first type of rice have a faster heating rate than the cooking containers containing the second type of rice. The residual water refers to the water remaining in the cooking container after being absorbed by the rice. Therefore, during the heating process, different grades of rice can be distinguished by identifying the heating rate of this temperature rise.

[0041] Furthermore, after determining the type of the rice according to the heating rate of the rice-water mixture, the method further includes: when the rice is of the first type, cooking it with a first pressure; when the rice is of the second type, cooking it with a second pressure, wherein the second pressure is greater than the first pressure. Cooking with the first pressure may also be referred to as cooking in a non-pressure mode, and cooking with the second pressure may also be referred to as cooking in a pressure mode.

[0042] For example, the first pressure is standard atmospheric pressure, that is, the absolute pressure is 100 kPa and the relative pressure is 0 kPa.

[0043] This is because the first type of rice tends to brown and peel on the bottom when cooked, and the browning will be more serious when pressure cooking is used, so it is not suitable for pressure cooking. The second type of rice tends to be undercooked and has a mediocre taste when cooked, so pressure cooking can make the rice not undercooked and have a soft and chewy texture.

[0044] Specifically, the cooking using the first pressure includes the following steps: First heating stage: heating the rice-water mixture to a preset first temperature; First boiling stage: heating the rice-water mixture from the first temperature to a preset second temperature so that the first pressure is reached inside the cooking appliance; First rice simmering stage: keeping the rice-water mixture at the first pressure for a preset first duration.

[0045] Further, after the first rice simmering stage, the cooking using the first pressure further includes a first heat preservation stage, where the first heat preservation stage is to keep warm the cooked rice.

[0046] Exemplarily, when the rice is the first type of rice, the cooking using the first pressure can be carried out in the following manner:

[0047] Controlling the heating element to heat at a preset first duty cycle to maintain the rice within a preset first temperature range, and obtaining a first actual heating duration of the heating element heating at the first duty cycle;

[0048] When the first actual heating duration is greater than or equal to a preset first theoretical duration, controlling the heating element to heat at a preset second duty cycle to maintain the rice within a preset second temperature range, and obtaining a second actual heating duration of the heating element heating at the second duty cycle;

[0049] When the second actual heating duration is greater than or equal to a preset second theoretical duration, stop heating;

[0050] Wherein, the second duty cycle is less than or equal to the first duty cycle; the minimum value of the first temperature range is greater than the maximum value of the second temperature range.

[0051] This is because controlling the heating element to heat at the first duty cycle is to quickly increase the temperature of the rice and water, while controlling the heating element to heat at the second duty cycle is to evaporate the water; if the second duty cycle is greater than the first duty cycle, it is likely to cause the bottom to be scorched.

[0052] Specifically, the cooking using the second pressure includes the following steps: Second heating stage: heating the rice-water mixture to a preset third temperature; Second boiling stage: heating the rice-water mixture from the third temperature to a preset fourth temperature so that the second pressure is reached inside the cooking appliance; Second rice simmering stage: keeping the rice-water mixture at the second pressure for a preset second duration.

[0053] Further, after the second rice simmering stage, the cooking using the second pressure further includes a second heat preservation stage, where the second heat preservation stage is to keep warm the cooked rice.

[0054] Exemplarily, when the rice is the second type of rice, the following method can be adopted for cooking with the second pressure:

[0055] Control the heating element to heat at a preset third duty ratio to heat the rice to a preset third temperature range;

[0056] After heating the rice to the third temperature range, control the heating element to heat at a preset fourth duty ratio, and obtain the fourth actual heating duration of the heating element heating at the fourth duty ratio;

[0057] When the fourth actual heating duration is greater than or equal to a preset fourth theoretical duration, relieve the pressure;

[0058] Wherein, the fourth duty ratio is less than or equal to the third duty ratio; the minimum value of the third temperature range is greater than the maximum value of the fourth temperature range.

[0059] This is because controlling the heating element to heat at the third duty ratio is to quickly increase the temperature of the rice and water, while controlling the heating element to heat at the fourth duty ratio is to evaporate the water; if the fourth duty ratio is greater than the third duty ratio, it is easy to cause the bottom to be scorched.

[0060] To more specifically illustrate the control method of the cooking appliance according to Embodiment 1 of the present invention, a specific example is given. In this example, P 额 represents the rated power, TB represents the bottom temperature of the inner pot, TT represents the top temperature of the inner pot, T represents the set temperature, t represents the actual duration, and t 设 represents the set duration, and DK1 is the duty ratio of a certain working stage, that is, heating for as and stopping for bs.

[0061] Figure 2 is a schematic flow diagram of an example of the control method of the cooking appliance according to Embodiment 1 of the present invention. As Figure 2 shown, it includes the following steps:

[0062] 1. After starting to work, the timing starts, and it heats at full power. When TT≥T1 (0<T1≤50℃), stop timing, otherwise repeat the previous step. The duration of this timing is t1, and the system makes a determination: when 0<t1≤t 设 (0<t 设 ≤10min), it is recognized as the cooking program for the first type of rice, and it cooks in a non-pressure mode. At this time, start timing until the end of the next stage of work, and the time is t2. Heat at a duty ratio of DK1 (1 / 2<DK1≤1) to maintain the TB temperature within [T2, T2 + 2] (T1<T2≤105℃). When t2≥t 设 (0<t 设≤15 min), continue to work with a duty cycle DK2 (0 < DK2 ≤ DK1) to maintain the temperature of TB within [T3, T3 + 4] (70 < T2 ≤ 100 °C). At this time, start timing until the end of the next stage of work, and the time is t3. Otherwise, repeat the previous step. When t3 ≥ t 设 (0 ≤ t 设 ≤ 20 min), then end the work. Otherwise, repeat the previous step.

[0063] 2. When t1 > t 设 (t 设 > 10 min), then it is recognized as the second type of rice cooking program and cook in a pressurized mode. The pressurization work is heated with a duty cycle DK3 (0 < DK3 ≤ DK1). When TB ≥ T4 (125 °C ≤ T4 ≤ 135 °C), then enter the pressure-holding stage. Otherwise, repeat the previous step. The pressure-holding stage is heated with a duty cycle DK4 (0 < DK4 < DK3). The working time during the pressure-holding process is t4. When t4 ≥ t 设 (0 ≤ t 设 ≤ 50 min), then enter the air-cooled pressure relief. Otherwise, repeat the previous step. When TT ≤ T5 (0 < T5 ≤ 98 °C), the air-cooled pressure relief stops and the entire cooking process ends. Otherwise, repeat the previous step.

[0064] Embodiment 2

[0065] Corresponding to Embodiment 1 of the present invention, Embodiment 2 of the present invention provides a control device for a cooking appliance, Figure 3 which is a schematic structural diagram of the control device for the cooking appliance in Embodiment 2 of the present invention. As Figure 3 shown, the control device for the cooking appliance in Embodiment 2 of the present invention includes a preheating module 20, an acquisition module 21, a heating rate determination module 22, and a rice type determination module 23.

[0066] Specifically, after receiving a cooking instruction, the preheating module 20 is used to control a heating element to preheat the rice-water mixture in the cooking appliance;

[0067] The acquisition module 21 is used to acquire heating parameters related to the preheating;

[0068] The heating rate determination module 22 is used to determine the heating rate of the rice-water mixture during the preheating process according to the heating parameters;

[0069] The rice type determination module 23 is used to determine the type of rice according to the heating rate of the rice-water mixture.

[0070] The rice type determination module 23 is specifically configured to: when the heating rate is greater than or equal to a preset first speed threshold, determine that the rice is the first type of rice; when the heating rate is less than the first speed threshold, determine that the rice is the second type of rice.

[0071] The heating parameters include a preheating temperature and a preheating duration corresponding to the end moment of the preheating. The heating rate determination module 22 is specifically configured to: calculate the ratio of the preheating temperature to the preheating duration to obtain the heating rate of the rice-water mixture.

[0072] The preheating module 20 is specifically configured to: control the heating element to heat to the preheating temperature; or, control the heating element to heat for the preheating duration.

[0073] Further, the control device of the cooking appliance further includes a cooking module 24. When the rice is the first type of rice, the cooking module 24 is used to cook at a first pressure; when the rice is the second type of rice, the cooking module 24 is used to cook at a second pressure, where the second pressure is greater than the first pressure.

[0074] The cooking module 24 is specifically configured to: control the heating element to heat at a preset first duty cycle to maintain the rice within a preset first temperature range, and obtain the first actual heating duration of the heating element heating at the first duty cycle;

[0075] When the first actual heating duration is greater than or equal to a preset first theoretical duration, control the heating element to heat at a preset second duty cycle to maintain the rice within a preset second temperature range, and obtain the second actual heating duration of the heating element heating at the second duty cycle;

[0076] When the second actual heating duration is greater than or equal to a preset second theoretical duration, end the heating;

[0077] Wherein, the second duty cycle is less than or equal to the first duty cycle; the minimum value of the first temperature range is greater than the maximum value of the second temperature range.

[0078] The cooking module 24 is specifically configured to: control the heating element to heat at a preset third duty cycle to heat the rice to a preset third temperature range;

[0079] After heating the rice to the third temperature range, control the heating element to heat at a preset fourth duty cycle, and obtain a fourth actual heating duration of the heating element heating at the fourth duty cycle; when the fourth actual heating duration is greater than or equal to a preset fourth theoretical duration, perform pressure relief; wherein, the third duty cycle is less than or equal to the first duty cycle; wherein, the minimum value of the third temperature range is 100 °C.

[0080] For the specific details of the above cooking appliance, reference can be made to Figures 1 to 3 the corresponding relevant descriptions and effects in the illustrated embodiments, which will not be elaborated here.

[0081] Embodiment 3

[0082] The embodiment of the present invention further provides a cooking appliance, which may include a processor 41 and a memory 42, wherein the processor 41 and the memory 42 may be connected by a bus or other means, Figure 4 taking the connection by bus as an example.

[0083] The processor 41 may be a central processing unit (CPU). The processor 41 may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field programmable gate arrays (FPGAs) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. chips, or combinations of the above various types of chips.

[0084] The memory 42, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the control method of the cooking appliance in the embodiment of the present invention (for example, Figure 3 the preheating module 20, the acquisition module 21, the heating rate determination module 22, the rice type determination module 23, and the cooking module 24 shown). The processor 41 executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions, and modules stored in the memory 42, that is, implements the control method of the cooking appliance in the above method embodiments.

[0085] The memory 42 may include a program storage area and a data storage area. Among them, the program storage area can store an operating system and application programs required for at least one function; the data storage area can store data created by the processor 41 and the like. In addition, the memory 42 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state storage devices. In some embodiments, the memory 42 optionally includes a memory remotely disposed relative to the processor 41, and these remote memories can be connected to the processor 41 through a network. Examples of the above network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0086] The one or more modules are stored in the memory 42 and, when executed by the processor 41, execute the control method of the cooking appliance in the embodiments as Figures 1 to 3 shown.

[0087] Specific details of the above cooking appliance can be correspondingly referred to Figures 1 to 4 the relevant descriptions and effects in the corresponding embodiments shown, and will not be elaborated here.

[0088] Those skilled in the art can understand that to implement all or part of the processes in the above method embodiments, it can be completed by instructing relevant hardware through a computer program. The program can be stored in a computer-readable storage medium. When the program is executed, it can include the processes of the method embodiments as described above. Among them, the storage medium can be a magnetic disk, an optical disc, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD), etc.; the storage medium can also include a combination of the above types of memories.

[0089] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A control method for a cooking appliance, characterized in that, Including: After receiving a cooking instruction, controlling a heating element to preheat a rice-water mixture in a cooking appliance; Obtaining heating parameters related to the preheating; Determining a heating rate of the rice-water mixture during the preheating according to the heating parameters; Determining the type of rice according to the heating rate of the rice-water mixture; The determining the type of rice according to the heating rate of the rice-water mixture includes: When the heating rate is greater than or equal to a preset first speed threshold, determining that the rice is a first type of rice; When the heating rate is less than the first speed threshold, determining that the rice is a second type of rice; wherein the water absorption of the first type of rice is greater than that of the second type of rice; The heating parameters include a preheating temperature and a preheating duration corresponding to an end time of the preheating; the determining the heating rate of the rice-water mixture during the preheating according to the heating parameters includes: Calculating a ratio of the preheating temperature to the preheating duration to obtain the heating rate of the rice-water mixture.

2. The method according to claim 1, wherein The controlling the heating element to preheat the rice in the cooking appliance includes: Controlling the heating element to heat to the preheating temperature; or, controlling the heating element to heat for the preheating duration.

3. The method according to claim 1, characterized in that, After determining the type of rice according to the heating rate of the rice-water mixture, further including: When the rice is the first type of rice, cooking at a first pressure; When the rice is the second type of rice, cooking at a second pressure, wherein the second pressure is greater than the first pressure.

4. The method according to claim 3, characterized in that The cooking at the first pressure includes: A first heating stage: heating the rice-water mixture to a preset first temperature; A first boiling stage: heating the rice-water mixture from the first temperature to a preset second temperature to make the pressure in the cooking appliance reach the first pressure; A first simmering stage: keeping the rice-water mixture at the first pressure for a preset first duration; Or, The cooking at the second pressure includes: A second heating stage: heating the rice-water mixture to a preset third temperature; A second boiling stage: heating the rice-water mixture from the third temperature to a preset fourth temperature to make the pressure in the cooking appliance reach the second pressure; A second simmering stage: keeping the rice-water mixture at the second pressure for a preset second duration.

5. The method according to claim 4, characterized in that, After the first simmering stage, the cooking at the first pressure further includes: a first heat preservation stage; Or, after the second simmering stage, the cooking at the second pressure further includes: a second heat preservation stage.

6. A control device for a cooking appliance, characterized in that, Including: A preheating module, after receiving a cooking instruction, for controlling a heating element to preheat a rice-water mixture in a cooking appliance; An obtaining module, for obtaining heating parameters related to the preheating; A heating rate determining module, for determining a heating rate of the rice-water mixture during the preheating according to the heating parameters; A rice type determining module, for determining the type of rice according to the heating rate of the rice-water mixture; The rice type determination module is specifically configured to: when the heating rate is greater than or equal to a preset first speed threshold, determine that the rice is the first type of rice; when the heating rate is less than the first speed threshold, determine that the rice is the second type of rice; wherein the water absorption of the first type of rice is greater than that of the second type of rice. The heating parameters include a preheating temperature and a preheating duration corresponding to the end time of the preheating. The heating rate determination module is specifically configured to: calculate the ratio of the preheating temperature to the preheating duration to obtain the heating rate of the rice-water mixture.

7. A cooking appliance, characterized in that, including: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the computer instructions to execute the control method of the cooking appliance according to any one of claims 1 to 5.

8. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing the computer to execute the control method of the cooking appliance according to any one of claims 1 to 5.

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