Control method and control device of cooking utensil and cooking utensil

Abstract

The invention discloses a control method and device of a cooking utensil and the cooking utensil, the cooking utensil comprises a cooking main body, a cover body and a detection device, the cooking main body is provided with a cooking cavity with an opening in one end, and the cover body is arranged at the opening end of the cooking main body in an opening and closing mode; the control method of the cooking utensil comprises the steps that when the cooking utensil is in a heat preservation stage, whether a cover body is in a cover opening state or not is judged according to a detection signal of a detection device; when the cover body is in the uncovering state, the cooking utensil is controlled to reduce the heat preservation temperature within at least one time period of the heat preservation stage, the cooking utensil works at the temperature lower than the initial heat preservation temperature, the evaporation speed of water of rice becomes slow, and the problem that after the cover body of the electric cooker is uncovered in the heat preservation stage, the rice is prone to yellowing and drying is solved.

Description

Technical Field

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

[0002] When the rice cooker is in the heat preservation stage, if the user opens the lid to serve the rice and does not close the lid in time, the rice cooker will control the heating according to the heat preservation temperature before opening the lid. However, due to the continuous heating after opening the lid, the moisture of the rice will evaporate too quickly, resulting in the bottom turning yellow and the surface becoming dry. Summary of the Invention

[0003] The main object of the present invention is to propose a control method, a control device and a cooking appliance for a cooking appliance, aiming to solve the problem that the rice is prone to turn yellow and dry after the lid of the rice cooker is opened during the heat preservation stage.

[0004] To achieve the above object, a control method for a cooking appliance proposed by the present invention, the cooking appliance includes a cooking main body, a lid body and a detection device, the cooking main body has a cooking cavity with one end open, the lid body is provided at the open end of the cooking main body in an openable and closable manner, and the steps of the control method of the cooking appliance include:

[0005] When the cooking appliance is in the heat preservation stage, determine whether the lid body is in an open state according to the detection signal of the detection device;

[0006] When the lid body is in an open state, control the cooking appliance to reduce the heat preservation temperature within at least one time period in the heat preservation stage.

[0007] Optionally, the detection device includes a lid body angle detection device;

[0008] When the cooking appliance is in the heat preservation stage, the step of determining whether the lid body is in an open state according to the detection signal of the detection device includes:

[0009] When the cooking appliance is in the heat preservation stage, determine whether the lid body is in an open state according to the angle parameter of the lid body detected by the lid body angle detection device;

[0010] When the angle parameter is greater than a preset angle parameter, it is determined that the lid body is in an open state.

[0011] Optionally, the preset angle parameter is set to be greater than or equal to 30°.

[0012] Optionally, the detection device includes a temperature detection device provided on the lid body, and the temperature detection device is used to detect the temperature of the lid body facing the cooking cavity;

[0013] When the cooking appliance is in the heat preservation stage, the step of determining whether the cover is in the open state according to the detection signal of the detection device includes:

[0014] When the cooking appliance is in the heat preservation stage, determine whether the cover is in the open state according to the detected temperature parameter detected by the temperature detection device;

[0015] When at least one of the following conditions is satisfied, it is determined that the cover is in the open state:

[0016] When the current detected temperature parameter is less than or equal to the preset temperature parameter;

[0017] When the actual temperature difference value detected within the detection period is greater than or equal to the set temperature difference value;

[0018] When the temperature change rate detected within the detection period is greater than or equal to the set change rate;

[0019] Wherein, the detection period is within a certain time from the start time. When the temperature parameter currently detected by the temperature detection device is less than the heat preservation temperature, it is recorded as the start time.

[0020] Optionally, the preset temperature parameter is set to be less than or equal to 65 °C; and / or,

[0021] The set temperature difference value is set to be greater than or equal to 10 °C.

[0022] Optionally, the step of controlling the cooking appliance to reduce the heat preservation temperature within at least one time period in the heat preservation stage includes:

[0023] When the cover is in the open state, start timing for the open cover;

[0024] Determine the heat preservation temperature of the cooking appliance according to the open cover duration, wherein the open cover duration is negatively correlated with the heat preservation temperature.

[0025] Optionally, the step of determining the heat preservation temperature of the cooking appliance according to the open cover duration includes:

[0026] Establish a preset mapping relationship between multiple open cover timing values and multiple heat preservation temperatures;

[0027] Determine the heat preservation temperature according to the current open cover timing value and the preset mapping relationship;

[0028] Wherein, the open cover timing value is the total duration from the moment when it is confirmed that the cover is in the open state to the current open cover.

[0029] The present invention also provides a control device, which includes a memory, a processor, and a control program for a cooking appliance stored on the memory and executable on the processor. The control program for the cooking appliance is configured to implement the steps of the control method for the cooking appliance as described above. The steps of the control method for the cooking appliance include:

[0030] When the cooking appliance is in the heat preservation stage, determine whether the lid is in an open state according to the detection signal of the detection device;

[0031] When the lid is in an open state, control the cooking appliance to reduce the heat preservation temperature during at least one time period in the heat preservation stage.

[0032] The present invention also provides a cooking appliance, which includes:

[0033] A cooking main body, which has a cooking cavity with an open end;

[0034] A lid, which is arranged at the open end of the cooking main body in an openable and closable manner;

[0035] A detection device; and

[0036] The above control device, which is electrically connected to the detection device and is used to control the operation of the cooking main body according to the detection device.

[0037] Optionally, the detection device includes a lid angle detection device; and / or

[0038] The detection device includes a temperature detection device for detecting the temperature at the inner side of the lid.

[0039] In the technical solution provided by the present invention, when the cooking appliance is in the heat preservation stage, determine whether the lid is in an open state according to the detection signal of the detection device; when the lid is in an open state, control the cooking appliance to reduce the heat preservation temperature during at least one time period in the heat preservation stage, and the cooking appliance operates at a temperature lower than the initial heat preservation temperature, so that the evaporation rate of the moisture in the rice slows down, to solve the problem that the rice is prone to turn yellow and dry after the lid is opened during the heat preservation stage of the rice cooker. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0041] Figure 1Schematic three-dimensional diagram of the first embodiment of the cooking appliance provided by the present invention;

[0042] Figure 2 Schematic three-dimensional diagram of the second embodiment of the cooking appliance provided by the present invention;

[0043] Figure 3 Schematic structural diagram of the control device of the cooking appliance in the hardware operating environment related to the solution of the embodiment of the present invention;

[0044] Figure 4 Schematic time / temperature curve diagram of the control method of the cooking appliance provided by the present invention;

[0045] Figure 5 Schematic time / temperature curve diagram for detecting whether the lid is opened in the control method of the cooking appliance provided by the present invention;

[0046] Figure 6 Schematic flowchart of an embodiment of the control method of the cooking appliance provided by the present invention;

[0047] Figure 7 Schematic flowchart of another embodiment of the control method of the cooking appliance provided by the present invention.

[0048] Explanation of the reference numerals in the drawings:

[0049] Reference numeral Name Reference numeral Name 100 Cooking appliance 3 Detection device 1 Cooking main body 31 Cover angle detection device 2 Cover 32 Temperature detection device

[0050] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0052] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0053] In addition, if descriptions such as "first" and "second" are involved in the embodiments of the present invention, the descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0054] When the rice cooker is in the heat preservation stage, if the user opens the lid to serve the rice and does not close the lid in time, the rice cooker will control the heating according to the heat preservation temperature before opening the lid. However, due to the continuous heating after opening the lid, the moisture of the rice will evaporate too quickly, resulting in the bottom turning yellow and the surface becoming dry.

[0055] To solve the above problems, the present invention provides a control method for a cooking appliance. Figure 1 Schematic diagram of a three-dimensional view of the first embodiment of the cooking appliance provided by the present invention; Figure 2 Schematic diagram of a three-dimensional view of the second embodiment of the cooking appliance provided by the present invention; Figure 3 Schematic diagram of the structure of the control device of the cooking appliance in the hardware operating environment related to the solution of the embodiment of the present invention; Figure 4 Schematic diagram of a time / temperature curve of the control method for the cooking appliance provided by the present invention; Figure 5 Schematic diagram of a time / temperature curve when detecting whether the lid is opened in the control method for the cooking appliance provided by the present invention; Figure 6 Schematic diagram of a flowchart of an embodiment of the control method for the cooking appliance provided by the present invention; Figure 7 Schematic diagram of a flowchart of another embodiment of the control method for the cooking appliance provided by the present invention.

[0056] Please refer to Figures 1 to 2 , the cooking appliance 100 includes a cooking main body 1, a lid body 2, a detection device 3 and a control device. The cooking main body 1 has a cooking cavity with one end open, and the lid body 2 is provided at the open end of the cooking main body 1 in an openable and closable manner.

[0057] In this embodiment, the detection device 3 is used to detect whether the lid body 2 is in an open state. When it is detected that the lid body 2 is opened, the control device controls the operation of the cooking appliance 100 according to the detection signal of the detection device 3.

[0058] In one embodiment, the detection device 3 includes a cover body angle detection device 31. The cover body angle detection device 31 is used to detect the rotation angle of the cover body 2. When it detects that the cover body 2 rotates relative to the initial position during the detection period, it determines that the cover body 2 is opened. When it detects that the angle of the cover body 2 does not change during the detection period, it determines that the cover body 2 is closed. Specifically, the cover body angle detection device 31 is a three-axis gyroscope, which is arranged in the circuit board module of the cover body 2. When the cover body 2 is opened, it will have a flipping action and generate an angle change, and the circuit board module will synchronously have an angle change, which will also cause the cover body angle detection device 31 to generate an angle change, avoiding the detection time delay of the detection device such as an external sensor for the state change of the cover body, and reducing the installation space and cost.

[0059] Please refer to Figure 1 , in another embodiment, the detection device 3 includes a temperature detection device 32 for detecting the temperature at the inner side of the cover body 2. When the detection device 3 includes the temperature detection device 32, since the cooking appliance 100 is in the heat preservation stage, the temperature in the cooking cavity is higher than the external environment temperature. After the cover body 2 is opened, the temperature in the cooking cavity will drop significantly. Then, when the temperature detection device 32 detects a sudden change in the temperature at the inner side of the cover body 2, it can be determined that the cover body 2 is opened.

[0060] Please refer to Figure 2 , in yet another embodiment, the detection device 3 includes a cover body angle detection device 31 and a temperature detection device 32. In this way, relevant detection signals can be detected by the two detection devices 3 simultaneously to determine whether the cover body 2 is opened.

[0061] Specifically, the control device includes a memory, a processor, and a control program of the cooking appliance 100 stored on the memory and executable on the processor. The control program of the cooking appliance 100 is configured to implement the steps of the control method of the cooking appliance 100.

[0062] Refer to Figure 3 , Figure 3 is a schematic structural diagram of the control device for the hardware operating environment involved in the embodiment solution of the present invention.

[0063] Such as Figure 3As shown in the figure, the control device may include: a processor 1001, such as a Central Processing Unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. Among them, the communication bus 1002 is used to implement connection communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard. Optionally, the user interface 1003 may also include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a Wireless-Fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed Random Access Memory (RAM) or a stable Non-Volatile Memory (NVM), such as a disk memory. Optionally, the memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0064] Those skilled in the art can understand that Figure 3 the structure shown in the figure does not constitute a limitation on the control device, and it may include more or fewer components than shown in the figure, or combine certain components, or have different component arrangements.

[0065] As Figure 3 shown, the memory 1005, as a storage medium, may include an operating system, a network communication device, a user interface device, and a control program for the cooking appliance 100.

[0066] In Figure 3 the control device shown in the figure, the network interface 1004 is mainly used for data communication with a network server; the user interface 1003 is mainly used for data interaction with a user; the processor 1001 and the memory 1005 in the control device of the present invention may be provided in the control device. The control device calls the control program for the cooking appliance 100 stored in the memory 1005 through the processor 1001 and executes the control method for the cooking appliance 100 provided in the embodiments of the present invention.

[0067] The embodiments of the present invention provide a control method for the cooking appliance 100. Referring to Figure 4 and Figure 6 , Figure 6 is a schematic flowchart of a control method for a cooking appliance 100 according to an embodiment of the present invention.

[0068] The control method for the cooking appliance 100 includes the following steps:

[0069] Step S10: When the cooking appliance 100 is in the heat preservation stage, determine whether the lid 2 is in the open state according to the detection signal of the detection device 3.

[0070] It can be understood that after the cooking is completed, the cooking appliance 100 maintains the heat of the rice at a heat preservation temperature lower than the cooking working temperature. When the lid 2 is in the closed state, the moisture of the rice stays in the cooking cavity, and the cooking appliance 100 can maintain a relatively high heat preservation temperature. After the lid 2 is opened, the opening of the cooking cavity is open, so it is necessary to timely detect whether the lid 2 is closed through the detection device 3, and accurately judge whether the cooking appliance 100 is opened according to the time point when the lid 2 is detected to be opened, and control the subsequent working state of the heating component of the cooking appliance 100 according to this time point.

[0071] Step S20: When the lid 2 is in the open state, control the cooking appliance 100 to reduce the heat preservation temperature within at least one time period in the heat preservation stage.

[0072] It should be noted that since the rice contains a large amount of moisture, the moisture will gradually evaporate during the heating process. If the heating time is too long or the temperature is too high, the evaporation of moisture will be more intense, resulting in the rice becoming dry. And in normally cooked rice, the starch will be gelatinized into a gelatinous state, making the rice grains stick together. However, overheating or too long heating time will cause the starch to be over-gelatinized, forming a relatively thick gelatinous layer, increasing the adhesion between the rice grains. This will cause the rice to become sticky and yellow. Then, to solve the problem of the rice turning yellow and dry, it is necessary to improve the heating temperature, heating duration, and the retention of rice moisture.

[0073] It can be understood that when the detection device 3 detects that the lid 2 is in the open state, it means that the moisture of the rice in the cooking cavity is in a state where it is easy to evaporate and the moisture loss is too fast. If the original heat preservation temperature is continued to be maintained at this time, it will cause the moisture of the rice to be lost too fast. At this time, it is necessary to timely reduce the heating power of the heating component of the cooking appliance 100 so that the speed of moisture loss of the rice can be reduced.

[0074] In the technical solution of the present invention, by controlling the cooking appliance 100 to reduce the heat preservation temperature within at least one time period in the heat preservation stage when it is detected that the lid 2 is in the open state, the cooking appliance 100 works at a temperature lower than the initial heat preservation temperature. In the open state and under the condition of the same open lid duration, at least during the period when the heat preservation temperature is reduced, the rate of moisture loss of the rice is reduced, and the evaporation speed of the moisture of the rice becomes slower, so as to solve the problem that the rice is prone to turn yellow and dry after the lid of the rice cooker is opened in the heat preservation stage.

[0075] Further, in one embodiment, refer toFigure 7 , the detection device 3 includes a lid angle detection device 31;

[0076] Step S10: When the cooking appliance 100 is in the heat preservation stage, determining whether the lid 2 is in the open state according to the detection signal of the detection device 3 includes:

[0077] Step S101: When the cooking appliance 100 is in the heat preservation stage, determine whether the lid 2 is in the open state according to the angle parameter of the lid 2 detected by the lid angle detection device 31.

[0078] Since the lid 2 is rotatably mounted on the cooking main body 1, when the lid 2 is opened, the lid 2 will rotate relative to the cooking main body 1. Therefore, it is possible to determine whether the lid 2 is opened according to the angle parameter of the lid 2 detected by the lid angle detection device 31.

[0079] It can be understood that determining whether the lid 2 is opened by the angle parameter detected by the angle detection device 3 can be specifically implemented in the following ways: ① An open lid angle threshold can be set. When the angle detection device 3 detects that the angle of the lid 2 exceeds this threshold, it is considered that the lid 2 is in the open state. ② By continuously monitoring and recording the change of the angle of the lid 2, the change trend of the angle can be observed. If the angle change exceeds a preset threshold and lasts for a period of time, it can be determined that the lid 2 is in the open state. ③ Other sensors can be combined to further confirm whether the lid 2 is in the open state. For example, a proximity sensor or a photoelectric sensor can be used to detect whether the lid 2 is separated from the container, so as to determine whether the lid 2 is in the open state. ④ By collecting and analyzing the data of the angle detection device 3, corresponding algorithms can be applied to determine the state of the lid 2. These algorithms can determine whether the lid 2 is in the open state according to parameters such as the rate and amplitude of the angle change. Of course, the method of determining whether the lid 2 is opened by the angle parameter detected by the angle detection device 3 is not limited to the above examples. Those skilled in the art may make other changes under the inspiration of the technical essence of the embodiments of this specification, but as long as the functions and effects achieved are the same or similar to those of the embodiments of this specification, they should all be covered within the protection scope of the embodiments of this specification.

[0080] Step S102: When the angle parameter is greater than the preset angle parameter, determine that the lid 2 is in the open state.

[0081] In the technical solution of the present invention, when the angle parameter is less than the preset angle parameter, it may only be that the lid 2 is not fully closed, and it will not have a particularly significant impact on the loss of moisture. Therefore, only when the angle parameter is greater than the preset angle parameter, it is determined that the lid 2 is in the open state, and at this time, there is a problem that the opening of the cooking main body 1 is too large and the moisture of the rice is likely to be lost.

[0082] Specifically, in a specific embodiment, the preset angle parameter is set to be greater than or equal to 30°. For example, it can be 35°, 40°, 50°, 60°, 70°, 80°, 90°, etc. When the preset angle parameter is set to the above values, it indicates that the opening of the cooking main body 1 is too large.

[0083] In addition to using the angle to detect the rotation of the lid 2 to detect the state of the lid 2, in another embodiment, refer to Figure 5 , the detection device 3 includes a temperature detection device 32 provided on the lid 2, and the temperature detection device 32 is used to detect the temperature of the lid 2 facing the cooking cavity;

[0084] Step S10: When the cooking appliance 100 is in the heat preservation stage, according to the detection signal of the detection device 3, the step of determining whether the lid 2 is in the open state includes:

[0085] Step S103: When the cooking appliance 100 is in the heat preservation stage, according to the detected temperature parameter detected by the temperature detection device 32, determine whether the lid 2 is in the open state.

[0086] It can be understood that the opening of the lid 2 will cause an increase in the heat exchange between the inside and outside of the cooking cavity, resulting in heat dissipation. The hot air and heat in the cooking cavity will escape through the opened space, causing the temperature in the cooking cavity to drop. And after the lid 2 is opened, the air convection in the cooking cavity will increase. It will cause the heat to be transferred from the surface of the food in the cooking cavity to the surrounding environment faster, making the temperature in the cooking cavity drop. According to this characteristic, the temperature detection device 32 can be used to detect the temperature inside the lid 2 to determine whether the lid 2 is in the open state.

[0087] Step S104: When at least one of the following conditions is satisfied, it is determined that the lid 2 is in the open state:

[0088] The current detected temperature parameter is less than or equal to the preset temperature parameter;

[0089] The actual temperature difference value detected within the detection period is greater than or equal to the set temperature difference value;

[0090] The temperature change rate detected within the detection period is greater than or equal to the set change rate;

[0091] Among them, the detection period is within a certain time from the start time. When the temperature parameter currently detected by the temperature detection device 32 is less than the heat preservation temperature, it is recorded as the start time.

[0092] It can be understood that the pre-detection temperature parameter is less than the preset temperature parameter: The preset temperature parameter is the set target temperature value. If the currently detected temperature is lower than this set value, it means that the temperature in the cooking cavity has not reached the expected level. It is very likely that the heat loss caused by the opening of the cover body 2 has caused the temperature to drop.

[0093] The actual temperature difference value within the detection period is greater than the set temperature difference value: The set temperature difference value is a range set according to actual needs and is used to judge the temperature change in the cooking cavity. If the actual temperature difference value detected within the detection period exceeds the set temperature difference threshold, it means that the temperature in the cooking cavity fluctuates greatly. It is very likely that the heat loss and uneven heat distribution are caused by the opening of the cover body 2.

[0094] The temperature change rate within the detection period is greater than the set change rate: The set change rate is a range set according to actual needs and is used to judge the temperature change speed in the cooking cavity. If the temperature change rate detected within the detection period exceeds the set change rate threshold, it means that the temperature in the cooking cavity changes rapidly. It is very likely that the heat loss and uneven heat distribution are caused by the opening of the cover body 2.

[0095] In the technical solution of the present invention, it is optimal to determine that the cover body 2 is opened when both of the two determination conditions that the currently detected temperature parameter is less than the preset temperature parameter and the actual temperature difference value detected within the detection period is greater than the set temperature difference value are satisfied. That the currently detected temperature parameter is less than the preset temperature parameter indicates that the temperature in the cooking cavity has not reached the expected level, while the actual temperature difference value being greater than the set temperature difference value means that the temperature in the cooking cavity fluctuates greatly. The simultaneous satisfaction of these two conditions means that there is an obvious difference between the temperature in the cooking cavity and the preset temperature, reflecting the heat loss and uneven heat distribution caused by the opening of the cover body 2. By simultaneously satisfying the two conditions that the currently detected temperature parameter is less than the preset temperature parameter and the actual temperature difference value is greater than the set temperature difference value, it is possible to more accurately determine that the cover body 2 is in the open state. And it is possible to avoid the problem of inaccurate measurement caused by the malfunction of the temperature detection device 32 during use.

[0096] In a specific embodiment, the working process is as follows: After the rice cooking is completed and enters the heat preservation state, the internal temperature of the cooking appliance 100 is T1 (for example: T1 = 73 °C), and the upper cover is opened at the moment M1. The temperature detection device 32 detects that the temperature drops rapidly. ① When the detected temperature drops below the open cover sensing set temperature T4 (for example: T4 = 50 °C); ② within the open cover sensing set time t1 (for example: t1 = 1 minute), the actual dropped temperature T2 (for example: T2 = 20 °C) sensed by the upper cover temperature sensing probe is greater than the open cover sensing dropped determination temperature T3 (for example: T2 = 10 °C). When both ① and ② are satisfied simultaneously, it is determined that the upper cover is opened.

[0097] Specifically, in this embodiment, the preset temperature parameter is set to be less than or equal to 65 °C; and / or,

[0098] The set temperature difference value is set to be greater than or equal to 10 °C. Because during the rice cooking process, when the rice is not cooked, it works at a cooking temperature close to 100 °C. Once the rice is cooked, the temperature can be adjusted to the warming mode and maintained at about 70 degrees Celsius to keep the heat and moisture of the rice. When the preset temperature parameter is set to be less than or equal to 65 °C, it means that at this time, the cooking cavity exchanges heat with the outside.

[0099] Further, referring to Figure 4 , in this embodiment, step S20: The step of controlling the cooking appliance 100 to reduce the warming temperature during at least one time period in the warming stage includes:

[0100] Step S201, when the lid 2 is in the open state, start the open lid timing.

[0101] It can be understood that when the lid 2 is opened passively, the temperature in the cooking cavity will change over time, and the detection process takes a certain amount of time. There is a certain time difference between the actual open lid time and the detected open lid time. Then when the lid 2 is detected to be open, the end point of the detection time period is used as the starting point for determining that the lid 2 is opened.

[0102] Step S202, determine the warming temperature of the cooking appliance 100 according to the open lid duration, where the open lid duration is negatively correlated with the warming temperature.

[0103] It can be understood that as known above, the higher the temperature, the faster the evaporation of water. Then the longer the open lid time of the lid 2, the greater the water loss of the rice, so a lower warming temperature is required. When the open lid duration of the lid 2 is shorter, even if the warming temperature is higher, the total amount of water loss of the rice will not be particularly large. When the open lid duration of the lid 2 is longer, in order to make the total amount of water loss of the rice not particularly large, the warming temperature can be set lower. Therefore, the open lid duration is set to be negatively correlated with the warming temperature to ensure that the total evaporation amount of water can be as small as possible.

[0104] In this embodiment, step S202: The step of determining the warming temperature of the cooking appliance 100 according to the open lid duration includes:

[0105] Step S2021, establish a preset mapping relationship between multiple open lid timing values and multiple warming temperatures.

[0106] It can be understood that the open lid timing value is the total duration from the moment when it is confirmed that the lid 2 is in the open state to the current open lid, Figure 3Taking the example shown, when the rice is just cooked, the heat preservation temperature of the cooking appliance 100 is set to T. During the time period t1 (for example: t1 = 10 minutes), the heat preservation temperature remains unchanged or slightly decreases, and the controlled temperature is T1 (T1 = T = 73 °C or T1 > 70 °C); when the opening time is greater than t1, when entering the time period t2 (for example: t2 = 1 hour), the controlled heat preservation temperature is reduced to T2 (for example: T2 = 60 °C); when the opening time is greater than t1 + t2 and enters the time period t3 (for example: t3 = 3 hours), the controlled heat preservation temperature is reduced to T3 (for example: T3 = 45 °C); when the opening time is greater than t1 + t2 + t3, the controlled heat preservation temperature is reduced to the ambient temperature (for example: 25 °C).

[0107] Step S2022: Determine the heat preservation temperature according to the current opening timekeeping value and the preset mapping relationship.

[0108] In the technical solution of the present invention, the cooking appliance 100, according to the cumulative duration, when each time period is reached, obtains the target temperature according to the constructed preset mapping relationship for the heat preservation temperature, and works at the lower target temperature until the heat preservation control temperature is reduced to the ambient temperature.

[0109] It should be understood that the above is only for illustration and does not constitute any limitation to the technical solution of the present invention. In specific applications, those skilled in the art can set according to needs, and the present invention does not limit this.

[0110] It should be noted that the above-described working process is only illustrative and does not limit the protection scope of the present invention. In actual applications, those skilled in the art can select some or all of them according to actual needs to achieve the purpose of the embodiment solution, and this is not limited here.

[0111] The above serial numbers of the embodiments of the present invention are only for description and do not represent the superiority or inferiority of the embodiments.

[0112] Through the description of the above embodiments, those skilled in the art can clearly understand that the above embodiment methods can be implemented by means of software plus a necessary general hardware platform. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as a read-only memory (ROM) / RAM, magnetic disk, optical disc), and includes several instructions to enable a terminal device (which can be a mobile phone, computer, server, or network device, etc.) to execute the methods described in various embodiments of the present invention.

[0113] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A method for controlling a cooking appliance, characterized in that: The cooking appliance comprises a cooking body, a cover, and a detection device. The cooking body has a cooking cavity with an open end. The cover is openably disposed at the open end of the cooking body. The cooking appliance control method comprises the following steps: When the cooking appliance is in the keep-warm stage, determining whether the cover is in the open state according to the detection signal of the detection device; When the cover is in the open state, the cooking appliance is controlled to lower the keeping-warm temperature within at least a period of time in the keeping-warm stage.

2. The cooking appliance control method according to claim 1, wherein: The detection device includes a cover angle detection device; When the cooking appliance is in the keep-warm stage, the step of determining whether the cover is in the open state according to the detection signal of the detection device comprises: When the cooking appliance is in the keep-warm stage, determining whether the cover is in an open state based on the angle parameter of the cover detected by the cover angle detection device; When the angle parameter is greater than a preset angle parameter, it is determined that the cover is in an open state.

3. The cooking appliance control method according to claim 2, wherein: The preset angle parameter is set to be greater than or equal to 30°.

4. The cooking appliance control method according to claim 1, wherein: The detection device includes a temperature detection device provided on the cover, and the temperature detection device is used to detect the temperature of the cooking cavity facing the cover; When the cooking appliance is in the keep-warm stage, the step of determining whether the cover is in the open state according to the detection signal of the detection device comprises: When the cooking appliance is in the keep-warm stage, determining whether the cover is in the open state based on the temperature parameter detected by the temperature detection device; When at least one of the following conditions is met, it is determined that the cover is in the open state; The temperature parameter currently detected is less than or equal to the preset temperature parameter; The actual temperature difference detected during the detection period is greater than or equal to the set temperature difference; The temperature change rate detected during the detection period is greater than or equal to the set change rate; The detection period is a certain period of time from the start time, and when the temperature parameter currently detected by the temperature detection device is less than the insulation temperature, it is recorded as the start time.

5. The cooking appliance control method according to claim 4, wherein: The preset temperature parameter is set to be less than or equal to 65°C; and / or, The set temperature difference is set to be greater than or equal to 10°C.

6. The cooking appliance control method according to claim 1, wherein: The step of controlling the cooking appliance to lower the keeping-warm temperature during at least a period of time in the keeping-warm stage comprises: When the cover body is in the open state, the cover opening timer is performed; The heat preservation temperature of the cooking appliance is determined according to the lid opening time, wherein the lid opening time is negatively correlated with the heat preservation temperature.

7. The cooking appliance control method according to claim 6, wherein: The step of determining the heat preservation temperature of the cooking appliance according to the lid opening time includes: Establishing a preset mapping relationship between multiple lid opening timing values and multiple insulation temperatures; Determine the insulation temperature according to the current lid opening timing value and the preset mapping relationship; The cover opening timing value is the total time from the moment when the cover is confirmed to be in the cover opening state to the moment when the cover is currently opened.

8. A control device, characterized in that: The invention comprises a memory, a processor and a cooking appliance control program stored in the memory and executable on the processor, wherein the cooking appliance control program is configured to implement the steps of the cooking appliance control method according to any one of claims 1 to 7.

9. A cooking utensil, characterized in that: The cooking appliance comprises: a cooking body having a cooking cavity with an open end; a cover body, the cover body being openably arranged at the open end of the cooking body; a detection device; and, The control device according to claim 8, wherein the control device is electrically connected to the detection device and is used to control the operation of the cooking body according to the detection device.

10. The cooking appliance according to claim 9, wherein The detection device includes a cover angle detection device; and / or, The detection device includes a temperature detection device for detecting the temperature at the inner side of the cover body.

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