Stove and control method thereof

Abstract

The invention provides a stove and a control method thereof, relates to the technical field of household appliances, and is used for ensuring the accuracy of temperature control. The kitchen range comprises a temperature detection device used for detecting the temperature value of a pot arranged on the kitchen range; a heating device; the controller is configured to detect N temperature values of the cookware in the Pth period through the temperature detection device in the cooking process, P is a positive integer, and N is a positive integer; according to the N temperature values, determining a temperature change curve of the cookware in the Pth period; according to the power values of the multiple gears, the power value of the gear corresponding to the Pth period and the temperature change curve of the cookware in the Pth period, predicting the temperature change values of the cookware corresponding to the multiple gears in the (P + 1) th period; and determining a target gear of the heating device in the (P + 1) th period according to the temperature change values of the cookware corresponding to the plurality of gears in the (P + 1) th period.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a stove and a control method thereof. Background Art

[0002] In the prior art, the temperature control algorithm of the induction cooker is generally a proportional-integral-derivative control algorithm (PID). The three parameters of proportion, integration and differentiation are pre-set in the control program to control the heating of the induction cooker. However, when the induction cooker or pot is replaced, the preset PID parameters no longer meet the requirements, and the accuracy of temperature control cannot be guaranteed. Summary of the invention

[0003] The embodiments of the present application provide a stove and a control method thereof, which are used to ensure the accuracy of temperature control.

[0004] In order to achieve the above objectives, this application adopts the following technical solutions:

[0005] In a first aspect, the present application provides a stove, which includes: a temperature detection device for detecting the temperature value of a pot placed on the stove; a heating device; and a controller, which is configured to: during a cooking process, detect N temperature values ​​of the pot in a P-th cycle through the temperature detection device, where P is a positive integer and N is a positive integer; determine a temperature change curve of the pot in the P-th cycle based on the N temperature values; predict the temperature change values ​​of the pot corresponding to the multiple gears in the P+1-th cycle based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the P-th cycle, and the temperature change curve of the pot in the P-th cycle; determine a target gear of the heating device in the P+1-th cycle based on the temperature change values ​​of the pot corresponding to the multiple gears in the P+1-th cycle.

[0006] The technical solution provided by the present application brings at least the following beneficial effects: during the cooking process, the temperature change curve of the pot currently corresponding to the heating device in the Pth cycle is determined according to the N temperature values ​​of the pot in the Pth cycle; the temperature change values ​​of the pots corresponding to the multiple gears in the P+1th cycle are predicted according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the pot in the Pth cycle. It should be understood that the temperature change values ​​of the pots corresponding to the multiple gears in the next cycle are predicted in combination with the temperature change curve of the pot in the Pth cycle, which improves the accuracy of the prediction result; according to the temperature change values ​​of the pots corresponding to the multiple gears in the P+1th cycle, the target gear of the heating device in the P+1th cycle is determined, which ensures the accuracy of temperature control.

[0007] In some embodiments, the above-mentioned controller is configured to determine the temperature change curve of the cookware in the Pth cycle based on N temperature values, and is specifically configured as: determining the change slope and intercept of the temperature value of the cookware in the Pth cycle based on the N temperature values ​​and the time points corresponding to the N temperature values; determining the temperature change curve of the cookware in the Pth cycle based on the change slope and intercept of the temperature value of the cookware in the Pth cycle.

[0008] In some embodiments, the controller is configured to predict the temperature change values ​​of the cookware corresponding to multiple gears in the P+1th cycle based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle. The controller is specifically configured as follows: predicting the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; determining the temperature change values ​​of the cookware in the P+1th cycle corresponding to the multiple gears based on the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears and the duration of the P+1th cycle.

[0009] In some embodiments, the controller is configured to predict the temperature change curve of the cookware in the P+1th cycle corresponding to multiple gears based on the power values ​​of multiple gears, the power value of the gear corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle. The controller is specifically configured as follows: for any gear among the multiple gears, based on the ratio of the power value of the gear and the power value of the gear corresponding to the Pth cycle and the change slope and intercept of the temperature change curve of the cookware in the Pth cycle, predict the change slope and intercept of the temperature value of the cookware in the gear in the P+1th cycle; based on the change slope and intercept of the gear in the P+1th cycle, predict the temperature change curve of the cookware in the P+1th cycle corresponding to the gear.

[0010] In some embodiments, when the controller is configured to determine the target gear position of the heating device in the P+1th cycle based on the temperature change value of the cookware corresponding to multiple gears in the P+1th cycle, it is specifically configured as follows: detecting the first temperature value of the cookware at the last moment in the Pth cycle by a temperature detection device; determining a first temperature difference between the first temperature value and the target temperature value, the target temperature value being a pre-set cooking temperature value; determining the target gear position based on the first temperature difference and the temperature change value of the cookware corresponding to multiple gears in the P+1th cycle.

[0011] In some embodiments, the controller is configured to determine the target gear based on the first temperature difference and the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle. The controller is specifically configured as follows: for any gear among the multiple gears, determine the second temperature difference between the temperature change value of the cookware corresponding to the gear in the P+1th cycle and the first temperature difference; select any gear among the multiple gears whose second temperature difference is below the first preset difference as the target gear.

[0012] In some embodiments, the controller is further configured to: detect a second temperature value of the cookware through a temperature detection device; and control the heating device to stop running when the second temperature value is above the target temperature value and a third temperature difference between the second temperature value and the target temperature value is greater than a second preset difference.

[0013] In a second aspect, the present application provides a method for controlling a stove, comprising: during a cooking process, detecting N temperature values ​​of the cookware in the Pth cycle, where P is a positive integer and N is a positive integer; determining a temperature change curve of the cookware in the Pth cycle based on the N temperature values; predicting temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle based on power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; determining a target gear of the heating device in the P+1th cycle based on the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle.

[0014] In some embodiments, determining the temperature change curve of the cookware in the Pth cycle based on N temperature values ​​includes: determining the change slope and intercept of the temperature value of the cookware in the Pth cycle based on the N temperature values ​​and the time points corresponding to the N temperature values; determining the temperature change curve of the cookware in the Pth cycle based on the change slope and intercept of the temperature value of the cookware in the Pth cycle.

[0015] In some embodiments, the above-mentioned predicting the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle and the temperature change curve of the cookware in the Pth cycle includes: predicting the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle and the temperature change curve of the cookware in the Pth cycle; determining the temperature change values ​​of the cookware in the P+1th cycle corresponding to the multiple gears based on the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears and the duration of the P+1th cycle.

[0016] The beneficial effects described in the second aspect of this application can be referred to the analysis of the beneficial effects of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a stove provided in an embodiment of the present application Figure 1 ;

[0018] Figure 2 A schematic diagram of a stove provided in an embodiment of the present application Figure 2 ;

[0019] Figure 3 A schematic diagram of the connection relationship of a cooker provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of a stove provided in an embodiment of the present application Figure 3 ;

[0021] Figure 5 A schematic diagram of a stove provided in an embodiment of the present application Figure 4 ;

[0022] Figure 6 A schematic diagram of interaction between a stove and a terminal device provided in an embodiment of the present application;

[0023] Figure 7 A flow chart of a control method for a stove provided in an embodiment of the present application Figure 1 ;

[0024] Figure 8 A flow chart of a control method for a stove provided in an embodiment of the present application Figure 2 ;

[0025] Fig. 9 A schematic plan view of a temperature variation curve provided in an embodiment of the present application;

[0026] Fig.10 A flow chart of a control method for a stove provided in an embodiment of the present application Figure 3 ;

[0027] Fig.11 A flow chart of a control method for a stove provided in an embodiment of the present application Figure 4 ;

[0028] Fig.12 A flow chart of a control method for a stove provided in an embodiment of the present application Figure 5 ;

[0029] Fig.13 A flow chart of a control method for a stove provided in an embodiment of the present application Figure 6 ;

[0030] Fig.14 A schematic diagram of a gear change provided in an embodiment of the present application;

[0031] Fig.15 A flow chart of a control method for a stove provided in an embodiment of the present application Figure 7 ;

[0032] Fig.16 A schematic diagram of the overall flow of a method for controlling a cooker provided in an embodiment of the present application. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In addition, when describing a pipeline, the "connected" and "connection" used in this application have the meaning of conduction. The specific meaning needs to be understood in conjunction with the context.

[0036] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0037] Today's kitchenware products are undergoing a process of continuous refinement and intelligence. As large household appliances such as refrigerators, stoves, and range hoods become more and more intelligent, small household appliances such as induction cookers are also joining the ranks of intelligent upgrades.

[0038] In the prior art, the temperature control algorithm of the induction cooker is generally a proportional-integral-derivative control algorithm (PID). The three parameters of proportion, integration and differentiation are pre-set in the control program to control the heating of the induction cooker. However, when the induction cooker or pot is replaced, the preset PID parameters no longer meet the requirements, and the accuracy of temperature control cannot be guaranteed.

[0039] Based on this, the present application proposes a stove, which, during the cooking process, determines the temperature change curve of the pot currently corresponding to the heating device in the Pth cycle according to the N temperature values ​​of the pot in the Pth cycle; predicts the temperature change values ​​of the pots corresponding to the multiple gears in the P+1th cycle according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the pot in the Pth cycle. It should be understood that the temperature change values ​​of the pots corresponding to the multiple gears in the next cycle are predicted in combination with the temperature change curve of the pot in the Pth cycle, which improves the accuracy of the prediction result; according to the temperature change values ​​of the pots corresponding to the multiple gears in the P+1th cycle, the target gear of the heating device in the P+1th cycle is determined, which ensures the accuracy of temperature control.

[0040] In the embodiment of the present application, the cooker can be an electromagnetic cooker, a smart cooker, an integrated cooker or a gas cooker, etc., and the present application does not make any specific restrictions on this. To further describe the scheme of the present application, the cooker is an electromagnetic cooker as an example, and a cooker provided in the embodiment of the present application is described in combination with the accompanying drawings.

[0041] In some embodiments, the electromagnetic cooker can also be called an induction cooker. It is a product of the modern kitchen revolution. The electromagnetic cooker does not require open flames or conductive heating, but allows heat to be generated directly at the bottom of the pot, so the thermal efficiency is greatly improved. The electromagnetic cooker is made using the principle of electromagnetic induction heating and consists of a high-frequency induction heating coil, a high-frequency power conversion device, and a controller. When in use, an alternating current is passed through the heating coil. An alternating magnetic field is generated around the coil, and most of the magnetic lines of force of the alternating magnetic field pass through the metal pot body, generating a large amount of eddy currents at the bottom of the pot, thereby generating the heat required for cooking. Since there is no open flame during the heating process, the electromagnetic cooker is safe, hygienic, and plug-and-play. The convenience is deeply loved by users, and the market usage rate is getting higher and higher.

[0042] To further describe the solution of this application, Figure 1 This is a schematic diagram of the overall structure of a stove provided in an embodiment of the present application. Figure 1 As shown, the cooker 100 includes a housing 101 , a cooktop panel 102 and a display 103 .

[0043] The stove top panel 102 is disposed on the housing 101 , and the stove top panel 102 can be used to carry pots.

[0044] In some embodiments, the stove top panel 102 may be made of a glass-ceramic panel or a ceramic panel. The glass-ceramic panel is light-transmissive, while the ceramic panel is opaque. Both panels are specially treated and have excellent properties of high temperature resistance and impact resistance.

[0045] In some embodiments, the display 103 may be a liquid crystal display or an organic light-emitting diode (OLED) display. The specific type, size, and resolution of the display 103 are not limited. It is understood by those skilled in the art that the display 103 may be modified in performance and configuration as needed.

[0046] In some embodiments, the display 103 can be used to display the control panel of the cooker 100 to implement a human-computer interaction function. Figure 2 As shown, the control panel of the stove 100 displayed on the display 103 may display icons of function buttons such as switch, stir-fry, hot pot, boiling water, timing, soup and porridge, constant temperature, slow fire, "+", "-", etc. Among them, the "+" function icon represents increasing the temperature or increasing the power, and the "-" function icon represents reducing the temperature or reducing the power. The rectangular box between the "+" and "-" function icons can be called a power / temperature display box, which can be used to display the power currently used by the stove, such as 2000W, or the set target temperature value, such as 200°C. It should be noted that the display of the function button in the form of an icon on the display 103 is only exemplary, and the embodiment of the present application does not limit the display method of the function button.

[0047] In some embodiments, the stove 100 can feedback the current state of the stove 100 through the display 103, such as the boiling water state or the stir-frying state.

[0048] See also Figure 3 As shown, the stove provided in the embodiment of the present application may further include a temperature detection device 104, a heating device 105 and a controller 106; the controller 106 is electrically connected to the display 103, the temperature detection device 104 and the heating device 105 respectively.

[0049] In some embodiments, see Figure 4 As shown, the temperature detection device 104 can be disposed on the surface of the stove top panel 102 to detect the temperature of the pot placed on the stove top panel 102 .

[0050] In some embodiments, the temperature detection device 104 can be a device with a temperature detection function such as a thermocouple, a thermal resistor, and a temperature sensor chip; taking a thermal resistor as an example, its working principle is the characteristic that the resistance value of the material used in the thermal resistor temperature detection device changes with temperature. A common thermal resistor element is a platinum resistor, and the resistance value changes linearly with temperature. The temperature is determined by measuring the resistance value.

[0051] In some embodiments, see Figure 5 As shown, the heating device 105 can be arranged inside the housing 101 and below the stove top panel 102.

[0052] In some embodiments, see Figure 5 As shown, the shape of the heating device 105 can be a coil.

[0053] In some embodiments, the working principle of the heating device 105 is to use the principle of electromagnetic induction to generate heat energy for heating. The energized coil generates a changing electromagnetic field at the bottom. When the magnetic pot is placed on top, the molecules of the magnetic material will vibrate or flip, causing friction between the molecules to generate heat energy. This heat energy is transferred to the bottom of the pot through the conduction of the magnetic material, thereby heating the food or liquid. The whole process is efficient and fast, with precise heating control capabilities.

[0054] In some embodiments, the controller 106 refers to a device that can generate an operation control signal according to the instruction operation code and the timing signal to instruct the cooker to execute the control instruction. Exemplarily, the controller 106 can be a central processing unit (CPU), a general-purpose processor network processor (NP), a digital signal processor (DSP), a microprocessor, a microcontroller, a programmable logic device (PLD), or any combination thereof. The controller 106 can also be other devices with processing functions, such as circuits, devices, or software modules, and the embodiments of the present application do not impose any restrictions on this.

[0055] In some embodiments, the cooker also has a communicator, which is connected to the controller 106 and is used to establish a communication connection with other network entities. Taking the RF module as an example, the RF module can be used to receive and send signals, especially to send the received information to the controller 106 for processing; in addition, the signal generated by the controller is sent out. Generally, the RF circuit can include but is not limited to an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier (LNA), a duplexer, etc.

[0056] For example, the stove can receive the control instruction sent by the terminal device through the communicator, and perform corresponding processing according to the control instruction to realize the interaction between the user and the stove.

[0057] Figure 6 This is a schematic diagram of interaction between a controller 106 of a stove and a terminal device according to an exemplary embodiment of the present application.

[0058] like Figure 6 As shown, the terminal device can establish a communication connection with the controller 106 of the cooker. Exemplarily, any known network communication protocol can be used to establish the communication connection. The above-mentioned network communication protocol can be various wired or wireless communication protocols, such as Ethernet, universal serial bus (USB), FireWire (FIREWIRE), any cellular network communication protocol (such as 3G / 4G / 5G), Bluetooth, wireless fidelity (wireless fidelity, Wi-Fi), NFC or any other suitable communication protocol. The above-mentioned communication connection can be a Bluetooth connection, NFC, Zigbee, wireless fidelity (wireless fidelity, Wi-Fi), etc. The embodiments of the present application do not specifically limit this.

[0059] It should be noted that Figure 6 The terminal device shown is only an example of a terminal device. The terminal device in this application can be a remote control, a mobile phone, a tablet computer, a personal computer (PC), a personal digital assistant (PDA), a smart watch, a netbook, a wearable electronic device, an augmented reality (AR) device, a virtual reality (VR) device, a robot, etc. This application does not impose any special restrictions on the specific form of the terminal device.

[0060] In some embodiments, the controller 106 is configured to: during the cooking process, detect N temperature values ​​of the cookware in the Pth cycle through a temperature detection device, where P is a positive integer and N is a positive integer; determine the temperature change curve of the cookware in the Pth cycle based on the N temperature values; predict the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; determine the target gear of the heating device in the P+1th cycle based on the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle.

[0061] According to the above content, in the cooking process, the present application determines the temperature change curve of the pot currently corresponding to the heating device in the Pth cycle according to the N temperature values ​​of the pot in the Pth cycle; predicts the temperature change values ​​of the pots corresponding to the multiple gears in the P+1th cycle according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the pot in the Pth cycle. It should be understood that the temperature change values ​​of the pots corresponding to the multiple gears in the next cycle are predicted in combination with the temperature change curve of the pot in the Pth cycle, which improves the accuracy of the prediction result; according to the temperature change values ​​of the pots corresponding to the multiple gears in the P+1th cycle, the target gear of the heating device in the P+1th cycle is determined to ensure the accuracy of temperature control.

[0062] In some embodiments, the controller 106 is configured to determine the temperature change curve of the cookware in the Pth cycle based on N temperature values, and is specifically configured to: determine the change slope and intercept of the temperature value of the cookware in the Pth cycle based on the N temperature values ​​and the time points corresponding to the N temperature values; determine the temperature change curve of the cookware in the Pth cycle based on the change slope and intercept of the temperature value of the cookware in the Pth cycle.

[0063] According to the above content, the present application determines the change slope and intercept of the temperature value in the Pth cycle according to the N temperature values ​​in the Pth cycle and the time points corresponding to the N temperature values, and then determines the temperature change curve of the pot in the Pth cycle. It should be understood that obtaining the temperature change curve of the pot in the Pth cycle is beneficial to predict the temperature change in the P+1th cycle, thereby achieving more accurate temperature control.

[0064] In some embodiments, the controller 106 is configured to predict the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle. The controller 106 is specifically configured to: predict the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; determine the temperature change values ​​of the cookware in the P+1th cycle corresponding to the multiple gears based on the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears and the duration of the P+1th cycle.

[0065] According to the above content, the present application predicts the temperature change curves of the cookware at multiple gears in the P+1th cycle by using the power values ​​of multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curves of the cookware in the Pth cycle, which is helpful to understand the temperature change of the cookware in the next cycle. It should be understood that based on the temperature change curves of the cookware in the P+1th cycle corresponding to the multiple gears, and combined with the duration of the P+1th cycle, determining the temperature change values ​​of the cookware at multiple gears in the P+1th cycle is helpful to more accurately control and adjust the temperature of the cookware, thereby achieving an ideal cooking effect.

[0066] In some embodiments, the controller 106 is configured to predict the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears based on the power values ​​of the multiple gears, the power value of the gear corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle. The controller 106 is specifically configured as follows: for any gear among the multiple gears, based on the ratio of the power value of the gear and the power value of the gear corresponding to the Pth cycle and the change slope and intercept of the temperature change curve of the cookware in the Pth cycle, predict the change slope and intercept of the temperature value of the cookware in the gear in the P+1th cycle; based on the change slope and intercept of the gear in the P+1th cycle, predict the temperature change curve of the cookware in the P+1th cycle corresponding to the gear.

[0067] According to the above content, the present application is directed to any of the multiple gears, and according to the ratio of the power value of the gear and the power value of the gear corresponding to the Pth cycle and the change slope and intercept of the temperature change curve of the pot in the Pth cycle, the change slope and intercept of the pot temperature value of the gear in the P+1th cycle are predicted in real time, and then the temperature change curve of the pot corresponding to the gear in the P+1th cycle is predicted. It should be understood that the change slope and intercept of the pot in the next cycle are predicted in real time based on the measured data, and then the temperature change curve of the pot in the next cycle is predicted, without the need to predict according to the preset PID parameters, thereby avoiding inaccurate prediction results caused by replacing the induction cooker or the pot, and ensuring the accuracy of temperature control.

[0068] In some embodiments, the controller 106 is configured to determine the target gear position of the heating device in the P+1th cycle based on the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle. The controller 106 is specifically configured as follows: detecting the first temperature value of the cookware at the last moment in the Pth cycle by a temperature detection device; determining a first temperature difference between the first temperature value and the target temperature value, where the target temperature value is a preset cooking temperature value; determining the target gear position based on the first temperature difference and the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle.

[0069] According to the above content, the present application detects the first temperature value of the pot at the last moment in the Pth cycle through the temperature detection device, and determines the first temperature difference between the target temperature value and the first temperature value, that is, determines the difference between the temperature of the pot and the target temperature at the end of the Pth cycle, so as to adjust the gear of the heating device. According to the first temperature difference and the temperature change value of the pot corresponding to multiple gears in the P+1th cycle, the target gear is determined, which can ensure the selection of the gear most suitable for the P+1th cycle, thereby ensuring the accuracy of temperature control.

[0070] In some embodiments, the controller 106 is configured to determine the target gear according to the first temperature difference and the temperature change value of the cookware corresponding to the multiple gears in the P+1th cycle, and is specifically configured as follows: for any gear among the multiple gears, determine the second temperature difference between the temperature change value of the cookware corresponding to the gear in the P+1th cycle and the first temperature difference; select any gear among the multiple gears whose second temperature difference is below the first preset difference as the target gear.

[0071] According to the above content, the present application determines the second temperature difference between the temperature change value of the pot corresponding to the gear in the P+1th cycle and the first temperature difference value for any gear among the multiple gears; selects any gear among the multiple gears whose second temperature difference value is below the first preset difference value as the target gear, that is, selects the gear that controls the difference between the temperature value of the pot and the target temperature value within the first preset difference value in the P+1th cycle as the target gear. It should be understood that controlling the difference between the temperature value of the pot and the target temperature value within a certain range ensures the accuracy of the temperature control of the stove, further ensures the heating effect of the stove on the pot, and improves the user experience.

[0072] In some embodiments, the controller 106 is further configured to: detect a second temperature value of the cookware through a temperature detection device; when the second temperature value is above the target temperature value and a third temperature difference between the second temperature value and the target temperature value is greater than a second preset difference, control the heating device to stop running.

[0073] According to the above content, the present application detects the temperature inside the pot through a temperature detection device. When the temperature inside the pot is above the target temperature and the difference between the temperature inside the pot and the target temperature is greater than a second preset difference, that is, when the temperature inside the pot is too high, the heating device is controlled to stop running to avoid overheating, thereby improving the safety of the stove.

[0074] It is to be understood that the structure illustrated in the embodiment of the present invention does not constitute a specific limitation on the cooker. In other embodiments of the present application, the cooker may include more or fewer components than those illustrated, or combine certain components, or separate certain components, or arrange the components differently. The illustrated components may be implemented in hardware, software, or a combination of software and hardware.

[0075] The following is a detailed introduction to the embodiments of the present application in conjunction with the accompanying drawings.

[0076] The present application embodiment provides a control method for a stove, which is applied to a controller, and the controller may be the controller 106 in the stove. Figure 7 As shown, taking the stove as an example, the control method provided in the embodiment of the present application may include the following steps:

[0077] S101. During the cooking process, N temperature values ​​of the cookware in the Pth cycle are detected.

[0078] Wherein, P is a positive integer, and N is a positive integer.

[0079] S102: Determine a temperature variation curve of the cookware in the Pth period according to the N temperature values.

[0080] See also Figure 8 As shown, the above S102 provided in the embodiment of the present application can be specifically implemented as follows:

[0081] S201. Determine a change slope and an intercept of the temperature value of the cookware in the Pth period according to N temperature values ​​and the time points corresponding to the N temperature values.

[0082] S202: Determine a temperature variation curve of the cookware in the Pth period according to a variation slope and an intercept of the temperature value of the cookware in the Pth period.

[0083] In some embodiments, see Fig. 9 As shown in the figure, A1(t1,T1), A2(t2,T2)...A N (t N ,T N ) represent the N temperature values ​​and their corresponding time points in the Pth cycle, t represents the time point, and T represents the actual temperature value. Based on the N temperature values ​​in the Pth cycle and the time points corresponding to the N temperature values, combined with the linear regression algorithm, the temperature change curve of the pot in the Pth cycle is determined as follows:

[0084] Y i =at i +b

[0085] Where Y i Represents the predicted temperature value, t irepresents time, a represents the slope, and b represents the intercept.

[0086] It should be noted that the predicted temperature value Y i and the actual temperature value T i There is a deviation value e between them.

[0087] In some embodiments, in the process of determining the temperature change curve of the cookware in the Pth period, the slope a and the intercept b that minimize the sum of the deviation values ​​e corresponding to the N temperature values ​​are determined according to the following method, and the minimum value of e(a, b) is calculated by the following formula:

[0088]

[0089] And, determine the slope a and intercept b according to the following system of equations:

[0090]

[0091]

[0092] Finally get as well as,

[0093] In some embodiments, during the cooking process, the change slope and intercept of the temperature value of the cookware in the Pth cycle are determined based on N temperature values ​​and the time points corresponding to the N temperature values; the temperature change curve of the cookware in the Pth cycle is determined based on the change slope and intercept of the temperature value of the cookware in the Pth cycle, so as to determine the temperature change values ​​of the cookware in the P+1th cycle corresponding to multiple gears of the heating device.

[0094] based on Figure 8 In the embodiment shown, the present application brings at least the following beneficial effects: according to the N temperature values ​​in the Pth period and the time points corresponding to the N temperature values, the change slope and intercept of the temperature value in the Pth period are determined, and then the temperature change curve of the pot in the Pth period is determined. It should be understood that obtaining the temperature change curve of the pot in the Pth period is beneficial to predict the temperature change in the P+1th period, thereby achieving more accurate temperature control.

[0095] S103, predicting the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle according to the power values ​​of the multiple gears, the power values ​​of the corresponding gears in the Pth cycle, and the temperature change curve of the cookware in the Pth cycle.

[0096] See also Fig.10 As shown, the above S103 can be specifically implemented as the following steps:

[0097] S301, predicting the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle.

[0098] In some embodiments, during the cooking process, based on the power values ​​of multiple gears, the power values ​​of the gears corresponding to the P-th cycle, and the temperature change curve of the cookware in the P-th cycle, the temperature change curves of the cookware in the P+1-th cycle corresponding to the multiple gears are predicted to determine the temperature change conditions of the cookware in the P+1-th cycle corresponding to the multiple gears.

[0099] See also Fig.11 As shown, the above S301 can also be specifically implemented as the following steps:

[0100] S401. For any gear among the multiple gears, predict the changing slope and intercept of the temperature value of the cookware in the P+1th period according to the ratio of the power value of the gear and the power value of the gear corresponding to the Pth period and the changing slope and intercept of the temperature change curve of the cookware in the Pth period.

[0101] In some embodiments, for any one of the multiple gears, the slope and intercept of the change of the pot temperature value in the P+1th cycle of the gear are predicted according to the following formula:

[0102]

[0103] Where P i Indicates the power of the gear corresponding to the Pth cycle, P n Indicates the power of the gear that needs to be predicted, a i Indicates the slope of the change in the pot temperature value in the Pth cycle, a n It means that the change slope of the pot temperature value in the P+1th cycle corresponding to the gear position needs to be predicted, b i represents the intercept of the pot temperature value in the Pth cycle, b n It indicates that the intercept of the pot temperature value in the P+1th cycle corresponding to the gear position needs to be predicted.

[0104] For example, the current gear is gear 5, the power corresponding to gear 5 is 1000 watts, the power corresponding to gear 1 is 200 watts, and the change slope of the pot temperature value corresponding to gear 5 in the Pth cycle is 2, and the intercept is 3. At this time, according to the above formula, it can be predicted that the change slope of the pot temperature value corresponding to gear 1 in the P+1th cycle is 0.4, and the intercept is 0.6.

[0105] S402: predicting the temperature change curve of the cookware in the P+1th cycle corresponding to the gear position according to the change slope and intercept of the gear position in the P+1th cycle.

[0106] For example, if the slope and intercept of the 4th gear are predicted to be 3 and 4 respectively, then it can be predicted that the temperature change curve of the cookware in the P+1th cycle corresponding to the gear is Y=3t+4.

[0107] based on Fig.11 The method described above at least brings the following beneficial effects: for any of the multiple gears, according to the ratio of the power value of the gear and the power value of the gear corresponding to the Pth period and the change slope and intercept of the temperature change curve of the pot in the Pth period, the change slope and intercept of the pot temperature value of the gear in the P+1th period are predicted in real time, and then the temperature change curve of the pot corresponding to the gear in the P+1th period is predicted. It should be understood that the change slope and intercept of the pot in the next period are predicted in real time according to the measured data, and then the temperature change curve of the pot in the next period is predicted, without the need to predict according to the preset PID parameters, thereby avoiding inaccurate prediction results caused by replacing the induction cooker or the pot, and ensuring the accuracy of temperature control.

[0108] S302, determining the temperature change values ​​of the cookware in the P+1th cycle corresponding to the multiple gears according to the temperature change curves of the cookware in the P+1th cycle corresponding to the multiple gears and the duration of the P+1th cycle.

[0109] It should be noted that the duration of the P+1th cycle is preset by the user or relevant technical personnel.

[0110] For example, if it is determined that the temperature change curve of the cookware in the P+1th cycle corresponding to gear 1 is Y=t+1, and the temperature change curve of the cookware in the P+1th cycle corresponding to gear 2 is Y=1.5t+1.5, the unit of t is minutes, and the duration of the P+1th cycle is 3 minutes; based on the above-mentioned temperature change curve of gear 1 and the temperature change curve of gear 2, it can be determined that the temperature change value of the cookware in the P+1th cycle corresponding to gear 1 is 4 degrees Celsius, and the temperature change value of the cookware in the P+1th cycle corresponding to gear 2 is 6 degrees Celsius.

[0111] In some embodiments, during the cooking process, based on the power values ​​of multiple gears, the power values ​​of the gears corresponding to the P-th cycle, and the temperature change curve of the cookware in the P-th cycle, the temperature change curves of the cookware corresponding to the multiple gears in the P+1-th cycle are predicted to determine the temperature change of the cookware in the P+1-th cycle corresponding to the multiple gears; based on the temperature change curves of the cookware in the P+1-th cycle corresponding to the multiple gears and the duration of the P+1-th cycle, the temperature change values ​​of the cookware in the P+1-th cycle corresponding to the multiple gears are determined.

[0112] based on Fig.10The embodiment described above at least brings the following beneficial effects: by using the power values ​​of multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle to predict the temperature change curve of the cookware in the multiple gears in the P+1th cycle, it is helpful to understand the temperature change of the cookware in the next cycle. It should be understood that based on the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears, and combined with the duration of the P+1th cycle, determining the temperature change value of the cookware in the P+1th cycle of the multiple gears is beneficial to more accurately control and adjust the temperature of the cookware, thereby achieving an ideal cooking effect.

[0113] S104, determining a target gear position of the heating device in the P+1th cycle according to the temperature change values ​​of the cookware corresponding to the multiple gear positions in the P+1th cycle.

[0114] See also Fig.12 As shown, the above S104 can be specifically implemented as the following steps:

[0115] S501, detecting a first temperature value of the cookware at the last moment in the Pth cycle.

[0116] S502: Determine a first temperature difference between a first temperature value and a target temperature value.

[0117] The target temperature value is a cooking temperature value preset by the user at the beginning of cooking.

[0118] S503: Determine a target gear position according to the first temperature difference and the temperature change values ​​of the cookware corresponding to the multiple gear positions in the P+1th cycle.

[0119] In some embodiments, after determining the temperature change values ​​of the cookware corresponding to multiple gears in the P+1th cycle, the target gear is determined based on the first temperature difference between the first temperature value of the cookware at the last moment in the Pth cycle and the target temperature value, and the temperature change values ​​of the cookware corresponding to multiple gears in the P+1th cycle, to ensure that the gear most suitable for the P+1th cycle is selected.

[0120] It should be understood that the temperature detection device detects the first temperature value of the pot at the last moment in the Pth cycle, and determines the first temperature difference between the target temperature value and the first temperature value, that is, determines the difference between the temperature of the pot and the target temperature at the end of the Pth cycle, so as to adjust the gear of the heating device. According to the first temperature difference and the temperature change values ​​of the pot corresponding to the multiple gears in the P+1th cycle, the target gear is determined, which can ensure the selection of the gear most suitable for the P+1th cycle, thereby ensuring the accuracy of temperature control.

[0121] See also Fig.13 As shown, the above S503 specifically includes the following steps:

[0122] S601. For any one of the multiple gears, determine a second temperature difference between a temperature change value of the cookware corresponding to the gear in the P+1th cycle and a first temperature difference.

[0123] S602: Select any gear among multiple gears whose second temperature difference is less than the first preset difference as the target gear.

[0124] The first preset temperature difference is preset when the cooker leaves the factory.

[0125] For example, the heating device has 4 gears, namely A, B, C and D, and the corresponding temperature change values ​​of the cookware in the P+1th cycle are 5 degrees Celsius, 8 degrees Celsius, 12 degrees Celsius and 18 degrees Celsius respectively; the first temperature difference is 10 degrees Celsius, and the first preset temperature difference is 3 degrees Celsius. According to the above information, it can be determined that the gears with the second temperature difference below the first preset difference are gears B and C. At this time, any gear of gear B and gear C can be selected as the target gear.

[0126] based on Fig.13 The method shown at least brings the following beneficial effects: for any gear among the multiple gears, determine the second temperature difference between the temperature change value of the pot corresponding to the gear in the P+1th cycle and the first temperature difference; select any gear among the multiple gears whose second temperature difference is below the first preset difference as the target gear, that is, select the gear that makes the difference between the temperature value of the pot and the target temperature value within the first preset difference in the P+1th cycle as the target gear. It should be understood that controlling the difference between the temperature value of the pot and the target temperature value within a certain range ensures the accuracy of the temperature control of the stove, further ensures the heating effect of the stove on the pot, and improves the user experience.

[0127] In some embodiments, during the cooking process, the adjustment of the gear position and the temperature change curve detected by the temperature sensor can refer to Fig.14 shown.

[0128] See also Fig.15 As shown, the technical solution provided in the embodiment of the present application also includes the following method:

[0129] S701, detecting a second temperature value of the cookware.

[0130] S702: When the second temperature value is above the target temperature value and a third temperature difference between the second temperature value and the target temperature value is greater than a second preset difference, control the heating device to stop running.

[0131] In some embodiments, during the cooking process, a second temperature value of the cookware is detected; when the second temperature value is above the target temperature value, and a third temperature difference between the second temperature value and the target temperature value is greater than a second preset difference, that is, when the temperature of the cookware is too high, the heating device is controlled to stop operating to stop heating the cookware.

[0132] For example, the target temperature is 160 degrees Celsius and the second preset difference is 20 degrees Celsius. During the cooking process, the temperature of the pot is detected to be 200 degrees Celsius. The difference between the temperature of the pot and the target temperature is calculated to be 40 degrees Celsius, which is higher than the second preset difference, and the heating device is controlled to stop running.

[0133] based on Fig.15 The embodiment shown brings at least the following beneficial effects: by detecting the temperature inside the pot, when the temperature inside the pot is above the target temperature and the difference between the temperature inside the pot and the target temperature is greater than a second preset difference, that is, when the temperature inside the pot is too high, the heating device is controlled to stop running to avoid overheating, thereby improving the safety of the stove.

[0134] See also Fig.16 As shown, taking the heating device having 9 gears as an example, the technical solution provided in the embodiment of the present application can also be specifically implemented as the following steps:

[0135] First, the slope a of each gear is initialized according to the power of each gear.

[0136] It should be noted that when the gear position is 0, the slope a is a negative value.

[0137] Secondly, determine whether the temperature control mode is enabled. If not, the program ends; if enabled, a temperature data is collected every t seconds.

[0138] Then, it is determined whether N temperature data are collected. If N temperature data are collected, the gear position G of the heating device in the current cycle is calculated based on the collected N temperature data. i The corresponding slope and intercept of the change in pot temperature.

[0139] Further, according to the gear position G of the heating device in the current cycle i The corresponding change slope and intercept of the pot temperature change value are used to determine the temperature change slope and intercept of the pot in the next cycle at multiple gears of the heating device.

[0140] Further, it is determined whether the current temperature of the cookware is higher than the target temperature.

[0141] Finally, when the current temperature of the pot is higher than the target temperature, the gear position G0~G1 is calculated at the end of the next cycle. iChange the temperature of the pot to T0~T i , according to T0~T i Determine the target gear position G j。 When the current temperature of the pot is lower than the target temperature, calculate the gear position G at the end of the next cycle. i ~G9 respectively change the temperature of the pot to T i ~T9, according to T i ~The target gear G is determined in T9 j .

Claims

1. A cooking appliance, characterized in that: The stove comprises: A temperature detection device, used to detect the temperature of a pot placed on the cooker; Heating device; The controller is configured as: During the cooking process, the temperature detection device detects N temperature values ​​of the pot in the Pth cycle, where P is a positive integer and N is a positive integer; Determining a temperature variation curve of the cookware in the Pth period according to the N temperature values; Predicting the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; The target gear position of the heating device in the P+1th cycle is determined according to the temperature change values ​​of the cookware corresponding to the multiple gear positions in the P+1th cycle.

2. The cooker according to claim 1, characterized in that: When the controller is configured to determine the temperature change curve of the cookware in the Pth period according to the N temperature values, it is specifically configured as follows: Determine, according to the N temperature values ​​and the time points corresponding to the N temperature values, a change slope and an intercept of the temperature value of the cookware in the Pth period; According to the change slope and intercept of the temperature value of the cookware in the Pth period, the temperature change curve of the cookware in the Pth period is determined.

3. The cooker according to claim 2, characterized in that: The controller is configured to predict the temperature change value of the cookware corresponding to the multiple gears in the P+1th cycle according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle, and is specifically configured as follows: Predicting the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; According to the temperature change curves of the cookware in the P+1th cycle corresponding to the multiple gears and the duration of the P+1th cycle, the temperature change values ​​of the cookware in the P+1th cycle corresponding to the multiple gears are determined.

4. The cooker according to claim 3, characterized in that: The controller is configured to predict the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle, and is specifically configured as follows: For any one of the multiple gears, the temperature change curve of the cookware in the P+1th cycle corresponding to the gear is predicted based on the ratio of the power value of the gear and the power value of the gear corresponding to the Pth cycle and the slope and intercept of the temperature change curve of the cookware in the Pth cycle.

5. The cooker according to claim 1, characterized in that: The controller is configured to determine the target gear position of the heating device in the P+1th cycle according to the temperature change value of the cookware corresponding to the multiple gear positions in the P+1th cycle, and is specifically configured as follows: Detecting a first temperature value of the cookware at the last moment in the Pth cycle by a temperature detection device; Determining a first temperature difference between the first temperature value and a target temperature value, wherein the target temperature value is a preset cooking temperature value; The target gear position is determined according to the first temperature difference and the temperature change values ​​of the cookware corresponding to the multiple gear positions in the P+1th cycle.

6. The cooker according to claim 5, characterized in that: The controller is configured to determine the target gear position according to the first temperature difference and the temperature change values ​​of the cookware corresponding to the multiple gear positions in the P+1th cycle, and is specifically configured as follows: For any one of the multiple gears, determining a second temperature difference between a temperature change value of the cookware corresponding to the gear in the P+1th cycle and the first temperature difference; Any gear position among the multiple gear positions whose second temperature difference is less than the first preset difference is selected as the target gear position.

7. The cooker according to claim 1, characterized in that: The controller is also configured to: Detecting a second temperature value of the cookware by a temperature detection device; When the second temperature value is above the target temperature value and a third temperature difference between the second temperature value and the target temperature value is greater than a second preset difference, the heating device is controlled to stop operating.

8. A method for controlling a stove, characterized in that: The method comprises: During the cooking process, N temperature values ​​of the pot in the Pth cycle are detected, where P is a positive integer and N is a positive integer; Determining a temperature variation curve of the cookware in the Pth period according to the N temperature values; Predicting the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th cycle according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; The target gear position of the heating device in the P+1th cycle is determined according to the temperature change values ​​of the cookware corresponding to the multiple gear positions in the P+1th cycle.

9. The method according to claim 8, characterized in that Determining the temperature change curve of the cookware in the Pth period according to the N temperature values ​​includes: Determine, according to the N temperature values ​​and the time points corresponding to the N temperature values, a change slope and an intercept of the temperature value of the cookware in the Pth period; According to the change slope and intercept of the temperature value of the cookware in the Pth period, the temperature change curve of the cookware in the Pth period is determined.

10. The method according to claim 9, characterized in that The predicting, based on the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth period, and the temperature change curve of the cookware in the Pth period, the temperature change values ​​of the cookware corresponding to the multiple gears in the P+1th period includes: Predicting the temperature change curve of the cookware in the P+1th cycle corresponding to the multiple gears according to the power values ​​of the multiple gears, the power values ​​of the gears corresponding to the Pth cycle, and the temperature change curve of the cookware in the Pth cycle; According to the temperature change curves of the cookware in the P+1th cycle corresponding to the multiple gears and the duration of the P+1th cycle, the temperature change values ​​of the cookware in the P+1th cycle corresponding to the multiple gears are determined.

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