A cooking control method and system for microwave cooking apparatus

Abstract

The present invention belongs to the technical field of cooking, and specifically relates to a cooking control method and system for a microwave cooking appliance. The present invention introduces an intelligent detection and feedback control system, which can automatically adjust the microwave intensity at different stages of cooking, from preheating to stable heating to timely reducing power to prevent overcooking, and finally entering a low-power insulation mode. This method not only reduces unnecessary energy consumption, improves energy utilization efficiency and ensures better food cooking quality, but also achieves a more uniform and accurate cooking process, thereby improving user satisfaction and food safety and quality. In short, the cooking control method provided by the present invention effectively solves the problems of energy waste and uneven cooking in the prior art, and provides users with a new choice that is more energy-saving and efficient, easy to operate, and can ensure good cooking effects.

Description

Technical Field

[0001] The invention belongs to the technical field of cooking, and in particular relates to a cooking control method and system for a microwave cooking appliance. Background Art

[0002] In modern households and commercial kitchens, microwave cooking appliances are widely used due to their rapid heating capabilities and convenience. Prior art microwave cooking appliances usually adopt a fixed power output mode for cooking, that is, once the device is started, it will continue to operate at a preset high power level until the user manually stops it or the time reaches the set end. Although this traditional fixed power output method can heat food quickly, it has some limitations and shortcomings in practical applications.

[0003] A significant technical problem is the inefficient use of energy. Since traditional microwave ovens cannot dynamically adjust the power output according to the specific type and weight of food and the temperature changes during the cooking process, this often leads to unnecessary energy waste. For example, after the preheating stage, if the food continues to be heated at high power, the surface of the food may reach a high temperature too early, while the inside is not fully heated, resulting in uneven cooking and may cause the outside to be overcooked or dry, affecting the taste and nutritional value of the food. In addition, the lack of an effective heat preservation mechanism means that when the food approaches the ideal cooking temperature, there is no appropriate means to maintain this state without overheating. Summary of the invention

[0004] The purpose of the present invention is to provide a cooking control method and system for a microwave cooking appliance, which effectively solves the problems of energy waste and uneven cooking in the prior art, and provides users with a new choice that is more energy-efficient, efficient, easy to operate and can ensure good cooking effects.

[0005] To achieve the above object, the present invention provides a cooking control method for a microwave cooking appliance, comprising the following steps:

[0006] The microwave cooking device detects internal environmental parameters, records the initial state, and selects the corresponding preheating mode according to the type of food;

[0007] Based on the selected preheating mode, gradually increase the microwave intensity until it reaches a preset level, while monitoring the temperature change, and when the temperature reaches a predetermined range, start timing and keep the current microwave output stable;

[0008] Real-time evaluation of the energy absorption status of food, and adjustment of microwave output to meet cooking needs through sensor feedback. Based on the feedback information, microwave output is reduced in a timely manner. If the center temperature of the food is close to the target value, it is prepared to enter the heat preservation stage and reduce energy supply.

[0009] After entering the keep warm stage, the microwave cooking device automatically switches to the low-power keep warm mode until the user ends the operation or the time reaches the preset end point.

[0010] Preferably, the microwave cooking device detects internal environmental parameters and records the initial state, including:

[0011] At the moment the microwave cooking device is turned on, the sensor reads the current temperature and humidity as basic values;

[0012] Then the comprehensive environmental factor is calculated, which is based on the sum of the initial temperature and humidity;

[0013] According to the obtained comprehensive environmental coefficient, the preliminary microwave intensity is determined, and the preliminary microwave intensity is proportional to the environmental coefficient;

[0014] Store preliminary microwave intensity and initial temperature in memory location.

[0015] Preferably, the selecting of a corresponding preheating mode according to the type of food includes:

[0016] The user enters or selects a food category identifier;

[0017] The system queries the preset database to obtain the corresponding preheating mode parameters;

[0018] Determine the final preheating microwave intensity by combining the selected food category identifier and the determined preliminary microwave intensity;

[0019] The system sets the microwave output to the final preheating microwave intensity and starts the preheating procedure, while saving the relevant parameters in the memory location.

[0020] Preferably, the step of gradually increasing the microwave intensity until a preset level is reached based on the selected preheating mode while monitoring the temperature change comprises:

[0021] After setting the final preheat microwave intensity, the system increases the current microwave output in fixed increments, waiting for a stabilization period after each increase;

[0022] The sensor records the internal temperature after each adjustment and calculates the rate of temperature change;

[0023] When the temperature change rate is lower than the preset threshold, the system determines that it is close to the preset temperature range and adjusts the new microwave intensity;

[0024] If the new microwave intensity does not exceed the preset upper limit, the current microwave output is updated and monitoring continues until the preset condition is reached.

[0025] Preferably, when the temperature reaches a predetermined range, starting timing and maintaining the current microwave output stable comprises:

[0026] When the internal temperature reaches the lower limit of the preset range, the timer is started to record the cooking time;

[0027] Based on the cooking time, the cumulative energy input is calculated;

[0028] Activate the stirring device rotation angle and adjust the rotation frequency according to the cooking time;

[0029] The system continuously monitors internal temperature changes and evaluates the overall energy effect.

[0030] Preferably, the real-time evaluation of the energy absorption status of food and the adjustment of microwave output to meet cooking requirements through sensor feedback include:

[0031] During cooking, the temperature changes of the food are continuously monitored and the instantaneous energy absorption rate is calculated;

[0032] Comparing with the preset energy absorption standard value, if the instantaneous energy absorption rate is less than the standard value, then determining the microwave intensity adjustment factor;

[0033] combining the current microwave intensity with the adjustment factor to update the microwave intensity;

[0034] The updated microwave intensity and the corresponding instantaneous energy absorption rate are recorded and used for subsequent evaluation and adjustment.

[0035] Preferably, timely reducing microwave output according to the feedback information includes:

[0036] Analyze the trend of the instantaneous energy absorption rate. If it decreases three times in a row, the humidity protection response is triggered.

[0037] Evaluate the dryness of food by comparing the instantaneous energy absorption rate;

[0038] When the dryness exceeds the preset threshold, the current microwave intensity is adjusted to reduce the output to prevent overcooking;

[0039] The adjusted microwave intensity and the corresponding degree of dryness are stored together, and the change in instantaneous energy absorption rate is continuously monitored.

[0040] Preferably, if the food core temperature is monitored to be close to the target value, preparing to enter the heat preservation stage and reducing energy supply includes:

[0041] During monitoring, the sensor detects the core temperature of the food and compares it with the preset target temperature;

[0042] When the food core temperature reaches or approaches 90% of the target temperature, the heat preservation preparation program is started and the remaining temperature difference is calculated;

[0043] In order to smoothly transition to the heat preservation mode, the initial heat preservation microwave intensity is determined according to the remaining temperature difference;

[0044] Set the current microwave output to the initial insulation microwave intensity, set the insulation mode activation flag, and record this state to ensure that the system enters the insulation stage.

[0045] Preferably, after entering the heat preservation stage, the microwave cooking device automatically switches to a low-power heat preservation mode until the user ends the operation or the time reaches a preset end point, including:

[0046] After setting the initial heat preservation microwave intensity and activating the heat preservation mode flag, checking whether the user operation input or the timer reaches the preset heat preservation time;

[0047] If no user operation is detected and the timer has not reached the preset keeping warm time, the low-power microwave intensity for maintaining keeping warm is calculated and the current microwave output is updated;

[0048] The system operates continuously at low microwave intensity and periodically verifies user action or timer status to ensure that the keep warm mode is executing correctly;

[0049] When a user operation is detected or the timer reaches the preset keeping warm time, the microwave output is terminated and the device is restored to the standby state. At the same time, the keeping warm mode activation flag is cleared and the final state is recorded.

[0050] In another aspect, the present invention provides a cooking control system for a microwave cooking appliance, comprising:

[0051] The startup and initialization module is used to detect the internal environmental parameters of the microwave cooking device when it is started, record the initial state, and select the corresponding preheating mode according to the type of food;

[0052] A preheating and stabilization control module, for gradually increasing the microwave intensity until a preset level is reached based on a selected preheating mode, while monitoring temperature changes, and when the temperature reaches a predetermined range, starting timing and maintaining the current microwave output stable;

[0053] Dynamic adjustment and protection module, used to evaluate the energy absorption status of food in real time, adjust microwave output through sensor feedback to meet cooking needs, and reduce microwave output in time according to feedback information. If the center temperature of food is close to the target value, it will enter the heat preservation stage and reduce energy supply;

[0054] The keep warm and end management module is used to automatically switch the microwave cooking device to a low-power keep warm mode after entering the keep warm stage until the user ends the operation or the time reaches a preset end point.

[0055] Technical effects and advantages of the present invention: Compared with the prior art, the cooking control method and system of a microwave cooking appliance proposed by the present invention have the following advantages:

[0056] The present invention introduces an intelligent detection and feedback control system, which can automatically adjust the microwave intensity at different stages of cooking, from preheating to stable heating to timely reducing the power to prevent overcooking, and finally entering a low-power warm-keeping mode. This method not only reduces unnecessary energy consumption, improves energy utilization efficiency and ensures better food cooking quality, but also achieves a more uniform and accurate cooking process, thereby improving user satisfaction and food safety and quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a flow chart of a cooking control method for a microwave cooking appliance of the present invention;

[0058] Figure 2 The block diagram of the cooking control system of the microwave cooking appliance of the present invention. DETAILED DESCRIPTION

[0059] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0060] The present invention provides Figure 1 A cooking control method for a microwave cooking appliance is shown, comprising the following steps:

[0061] Step 1: The microwave cooking device detects internal environmental parameters and records the initial state; the details are as follows:

[0062] At the moment the device is started, the sensor reads the current temperature Te0 and humidity H0 as the basic values; by reading the current temperature and humidity as the basic values, it can be ensured that the measured values ​​at each startup reflect the actual environmental conditions, providing a reliable basis for subsequent operations.

[0063] The comprehensive environmental coefficient Ce is calculated using the formula Ce=Te0+H0; the preliminary microwave intensity is calculated based on the comprehensive environmental coefficient, so that the equipment can automatically adjust to the most suitable preheating mode according to actual environmental conditions, thereby improving cooking efficiency and reducing energy waste.

[0064] Based on the obtained comprehensive environmental coefficient Ce, the preliminary microwave intensity Mi is determined by the formula Mi=Ce*0.8; the system stores the preliminary microwave intensity Mi and the initial temperature Te0 in the memory location AdX. Storing the preliminary microwave intensity and the initial temperature in the memory location facilitates dynamic monitoring and adjustment of the cooking process in subsequent steps, and also facilitates users to view historical records.

[0065] Formula Ce=Te0+H0: This formula is used to calculate the comprehensive environmental coefficient (Ce), where Te0 is the current temperature read by the sensor at the moment of startup, and H0 is the humidity at the moment of startup. The formula simply adds the temperature and humidity to produce an overall indicator that reflects the current environmental conditions. This coefficient helps determine the initial microwave intensity suitable for the current environmental conditions.

[0066] Formula Mi=Ce*0.8: This formula is used to determine the initial microwave intensity (Mi). It is based on the comprehensive environmental coefficient (Ce), multiplied by an empirical adjustment factor of 0.8, to obtain the microwave intensity suitable for the initial stage. This factor is the best ratio obtained based on a large number of experiments, and can provide an initial heating intensity that is neither too strong nor too weak in most cases.

[0067] Assume in a typical usage scenario:

[0068] At the moment of startup, the sensor reads the current temperature Te0 = 25°C (Celsius).

[0069] At the same time, the humidity sensor reads a humidity value of H0 = 40% (relative humidity).

[0070] Calculate the comprehensive environmental coefficient Ce:

[0071] Ce=Te0+H0Ce=25+40Ce=65Ce=65

[0072] Determine the preliminary microwave intensity Mi:

[0073] Mi=Ce*0.8Mi=65*0.8Mi=52Mi=52

[0074] Therefore, in this case, the system sets the preliminary microwave intensity Mi to 52 units (the unit here can be any selected power unit, such as Watt), and stores this value together with the initial temperature Te0 in the memory location AdX for use in subsequent steps. This method ensures that the device can flexibly adjust its operating parameters according to specific environmental conditions, thereby achieving a more efficient and energy-saving cooking process.

[0075] Step 2: After step 1, select the corresponding preheating mode according to the type of food and adjust to the appropriate microwave intensity; the details are as follows:

[0076] After recording the initial state, the user inputs or selects the food category identifier Fd; allowing the user to input or select the food category identifier ensures that the device can provide customized preheating and heating solutions according to different food types to improve the cooking effect.

[0077] Based on the selected food category identifier Fd, the system queries the preset database to obtain the corresponding preheating mode parameters Pr; the system queries the preset database to obtain the corresponding food preheating mode parameters, which enables the device to automatically identify and apply the heating settings that best suit the current food type, simplifying the user's operation process.

[0078] Combined with the obtained preheating mode parameter Pr and the preliminary microwave intensity Mi calculated in step one, the final preheating microwave intensity Si is determined by the formula Si=Pr+(Mi*0.1); by combining the preheating mode parameter and the preliminary microwave intensity to calculate the final preheating microwave intensity, it is ensured that while taking environmental conditions into consideration, accurate energy allocation can be performed for specific foods, thereby improving cooking efficiency and quality.

[0079] The system sets the microwave output to the final preheating microwave intensity Si and starts the preheating procedure, while saving the preheating mode parameters Pr and the final preheating microwave intensity Si in the memory location AdY. Saving the preheating mode parameters and the final preheating microwave intensity in the memory location helps to dynamically monitor and adjust the cooking process in subsequent steps and provides users with historical cooking data reference.

[0080] Formula Si=Pr+(Mi*0.1): This formula is used to determine the final preheating microwave intensity (Si). It is based on two parts: one is the preheating mode parameter (Pr) obtained from the preset database, which reflects the ideal preheating conditions required for the selected food type; the other is the preliminary microwave intensity (Mi) multiplied by an empirical coefficient of 0.1. This coefficient is used to gently increase or decrease the preliminary microwave intensity to adapt to the preheating requirements of specific foods. In this way, the device can further optimize the microwave output in the preheating stage based on environmental conditions to ensure that the food reaches the ideal preheating state evenly and efficiently.

[0081] Assume in a typical usage scenario:

[0082] The user selected "chicken" as the food category identifier Fd.

[0083] After the system queries the preset database, it is learned that the preheating mode parameter of the chicken is Pr=75 units (the unit here can be any selected power unit, such as watts).

[0084] The preliminary microwave intensity Mi=52 units has been calculated in step 1 (from the previous example).

[0085] Calculate the final preheating microwave intensity Si:

[0086] Si=Pr+(Mi*0.1)Si=75+(52*0.1)Si=75+5.2Si=80.2Si=80.2

[0087] Therefore, in this case, the system will set the final preheating microwave intensity Si to 80.2 units and start the preheating procedure. At the same time, the system will store the preheating mode parameter Pr and the final preheating microwave intensity Si in the memory location AdY for use in subsequent steps.

[0088] This approach ensures that the device can flexibly adjust its working parameters according to the specific type of food, which not only improves cooking efficiency but also ensures the best cooking effect of the food. In addition, by saving these parameters, users can review and analyze their cooking history in the future and further optimize their personal cooking habits.

[0089] Step 3: Based on the mode selected in step 2, gradually increase the microwave intensity until it reaches a preset level while monitoring the temperature change; the details are as follows:

[0090] After setting the final preheating microwave intensity Si, the system increases the current microwave output by a fixed increment ΔM, waiting for a stabilization period Ti1 after each increase; this ensures that the food can be heated gradually without suddenly overheating, which helps to heat it evenly.

[0091] The sensor records the internal temperature Ten after each adjustment and calculates the temperature change rate Rt=(Ten-Ten-1) / Ti1; this allows the system to dynamically track temperature changes during the cooking process and respond in a timely manner.

[0092] When the temperature change rate Rt is lower than the threshold Vt, the system determines that it is close to the preset temperature range. At this time, the new microwave intensity Li is determined according to the formula Li=Si+ΔM*Rt; this step ensures that the adjustment of microwave intensity is more accurate and adaptable, avoiding overheating.

[0093] If the new microwave intensity Li does not exceed the preset upper limit Ul, the current microwave output is updated to Li, and the temperature change rate Rt is associated with the new microwave intensity Li and stored in the memory location AdZ, and monitoring continues until the preset condition is met. This facilitates dynamic monitoring and adjustment of the cooking process in subsequent steps, and provides users with historical cooking data reference.

[0094] Formula Rt=(Ten-Ten-1) / Ti1: This formula is used to calculate the temperature change rate (Rt). It is based on the internal temperature difference (Ten-Ten-1) of two consecutive measurements divided by the stable period (Ti1), reflecting the rate of temperature change per unit time. A lower temperature change rate means that the temperature rises slowly or tends to be stable, prompting the system to consider reducing the microwave intensity.

[0095] Formula Li = Si + ΔM * Rt: This formula is used to determine the new microwave intensity (Li). It is based on the final preheating microwave intensity (Si) and the rate of temperature change (Rt) multiplied by a fixed increment (ΔM). If the rate of temperature change is small, indicating that the temperature is rising slowly or tending to stabilize, the microwave intensity increases less; otherwise, it increases more. This method ensures that the adjustment of the microwave intensity is neither too aggressive nor lagging, achieving the best heating effect.

[0096] Assume in a typical usage scenario:

[0097] The final preheating microwave intensity Si = 80.2 units (from the previous example).

[0098] The fixed increment ΔM = 5 units.

[0099] The stabilization period Ti1 = 10 seconds.

[0100] The preset upper limit Ul = 120 units.

[0101] The rate of temperature change threshold Vt = 0.5 °C / second.

[0102] The first adjustment:

[0103] The initial temperature Ten-1 = 25 °C.

[0104] After the microwave output increases by ΔM and passes through the stabilization period Ti1, the new temperature Ten = 30 °C recorded by the sensor.

[0105] Calculate the rate of temperature change Rt: Rt = (Ten - Ten-1) / Ti1 = (30 - 25) / 10 Rt = 0.5Rt = 0.5

[0106] Because the rate of temperature change Rt is equal to the threshold Vt, the system continues to monitor without immediately adjusting the microwave intensity.

[0107] The second adjustment:

[0108] The previously recorded temperature Ten-1 = 30 °C.

[0109] After increasing the microwave output by ΔM again, the new temperature Ten = 34 °C recorded by the sensor.

[0110] Calculate the rate of temperature change Rt: Rt = (Ten - Ten-1) / Ti1 = (34 - 30) / 10 Rt = 0.4Rt = 0.4

[0111] Since the rate of temperature change Rt < Vt, the system believes it is approaching the preset temperature range and calculates the new microwave intensity Li according to the formula:

[0112] Li=Si+ΔM*RtLi=80.2+5*0.4Li=80.2+2Li=82.2Li=82.2

[0113] The new microwave intensity Li does not exceed the preset upper limit Ul, so the system updates the current microwave output to 82.2 units, and stores the temperature change rate Rt and the new microwave intensity Li in the memory location AdZ, and continues to monitor until the preset conditions are met. This method ensures that the device can flexibly adjust its working parameters according to the actual temperature changes, which not only improves the cooking efficiency, but also ensures the best cooking effect of the food.

[0114] Step 4: When the temperature in step 3 reaches the predetermined range, start timing and keep the current microwave output stable to ensure that the heat is evenly distributed on the food; the details are as follows:

[0115] When the internal temperature Ten reaches the lower limit of the preset range, the system starts the timer to record the cooking time Di, ensuring that the formal cooking stage starts at the correct time to avoid heating too early or too late.

[0116] Based on the cooking time Di, the system calculates the cumulative energy input Qi according to the formula Qi=Li*Di; this helps to evaluate and control the total amount of energy delivered to the food during the entire cooking process, ensuring consistent and repeatable cooking.

[0117] In order to ensure uniform heat distribution, the system activates the stirring device rotation angle Ag and adjusts the rotation frequency Bg according to the formula Bg=Ag / Di to ensure that the food is heated evenly, prevent local overheating or uneven heating, and improve the taste and quality of the food.

[0118] The system continuously monitors the internal temperature change ΔTe and evaluates the total energy effect Ei through the formula Ei=Qi+ΔTe to determine whether the microwave output or stirring frequency needs to be adjusted. This allows the system to flexibly adjust the microwave output or stirring frequency according to actual conditions to maintain ideal cooking conditions.

[0119] Formula Qi=Li*Di: This formula is used to calculate the cumulative energy input (Qi). It is based on the product of the current microwave intensity (Li) and the cooking time (Di), reflecting the total energy delivered to the food during the entire cooking time. This calculation provides basic data for subsequent energy effect evaluation.

[0120] Formula Bg=Ag / Di: This formula is used to determine the rotation frequency of the stirring device (Bg). It is based on the rotation angle of the stirring device (Ag) divided by the cooking time (Di), ensuring that the speed of the stirring device during cooking matches the cooking time, thereby achieving optimal food mixing and heat distribution.

[0121] Formula Ei=Qi+ΔTe: This formula is used to evaluate the total energy effect (Ei). It combines the cumulative energy input (Qi) and the internal temperature change (ΔTe) to provide a comprehensive indicator to reflect the actual energy delivered to the food and its impact on the temperature. This evaluation helps the system decide whether it needs to adjust the microwave output or stirring frequency to optimize the cooking process.

[0122] Assume in a typical usage scenario:

[0123] The internal temperature Ten has reached the lower limit of the preset range of 60°C.

[0124] The current microwave intensity Li = 82.2 units (from the previous example).

[0125] The rotation angle of the stirring device is Ag = 90 degrees (per turn).

[0126] Start the timer and record the cooking time:

[0127] The system starts the timer to record the cooking time Di.

[0128] Calculate the cumulative energy input Qi:

[0129] Assume that after a period of time, the cooking time Di = 5 minutes (300 seconds).

[0130] Qi=Li*DiQi=82.2*300Qi=24660Qi=24660

[0131] Therefore, during this period, the cumulative energy input Qi is 24660 units.

[0132] Determine the rotation frequency Bg of the stirring device:

[0133] According to the formula:

[0134] Bg=Ag / Di,Bg=Ag / DiBg=90 / 300Bg=0.3Bg=0.3

[0135] This means that the stirring device rotates 0.3 degrees per second, or 18 degrees per minute, ensuring that the food is heated evenly.

[0136] Evaluate the total energy effect Ei and make adjustments:

[0137] Assume that over the next period of time, the internal temperature changes by ΔTe = +2°C.

[0138] Ei=Qi+ΔTeEi=24660+2Ei=24662Ei=24662

[0139] The system continuously monitors the internal temperature change ΔTe and determines whether it is necessary to adjust the microwave output or stirring frequency by evaluating the total energy effect Ei. If it is found that the temperature rises too fast or too slow, the system will adjust the microwave intensity or stirring frequency accordingly to ensure the best cooking effect.

[0140] This approach ensures that the appliance can precisely control energy input during the cooking process while achieving even heat distribution through effective stirring, ultimately providing high-quality cooking results.

[0141] Step 5: As step 4 proceeds, the energy absorption status of the food is evaluated in real time, and the microwave output is adjusted through sensor feedback to meet cooking needs; specifically:

[0142] During the cooking time Di, the sensor continuously monitors the temperature change ΔTen of the food and calculates the instantaneous energy absorption rate Rtn=ΔTen / Di; this allows the system to understand the energy absorption of the food in real time and make quick and accurate adjustments.

[0143] Based on the instantaneous energy absorption rate Rtn, the system compares it with the preset energy absorption standard value Rs. If Rtn is less than Rs, the microwave intensity adjustment factor Fn is determined by the formula Fn=Li*(Rs-Rtn); based on the comparison between the instantaneous energy absorption rate Rtn and the preset standard value Rs, the system can judge whether the current heating is sufficient, and determine the appropriate microwave intensity adjustment factor Fn by the formula Fn=Li*(Rs-Rtn), ensuring that the microwave output always meets cooking requirements.

[0144] The system combines the current microwave intensity Li with the adjustment factor Fn and uses the formula Lin+1=Li+Fn to update the microwave intensity to Lin+1 to ensure that cooking requirements are met;

[0145] The system records the updated microwave intensity Lin+1 and the corresponding instantaneous energy absorption rate Rtn, and stores these data in the memory location AdZ for subsequent evaluation and adjustment. This not only facilitates evaluation and adjustment in subsequent steps, but also provides valuable historical data for future cooking.

[0146] Formula Rtn=ΔTen / Di: This formula is used to calculate the instantaneous energy absorption rate (Rtn). It reflects how much energy the food absorbs per unit time based on the change in food temperature ΔTen during the cooking time Di. A lower Rtn means that the food absorbs energy slowly and the microwave intensity may need to be increased; a higher Rtn means that the absorption speed is fast and the microwave intensity may need to be reduced.

[0147] Formula Fn = Li * (Rs - Rtn): This formula is used to determine the microwave intensity adjustment factor (Fn). It is based on the difference between the current microwave intensity (Li) and the preset energy absorption standard value (Rs) and the instantaneous energy absorption rate (Rtn). If Rtn is less than Rs, it means that the actual energy absorption speed is lower than expected, and the system will increase the microwave intensity according to this difference; otherwise, it will decrease the microwave intensity.

[0148] Formula Lin+1 = Li + Fn: This formula is used to update the microwave intensity (Lin+1). It adds the current microwave intensity (Li) to the adjustment factor (Fn) to obtain the new microwave intensity value. This method ensures that each adjustment is based on the latest energy absorption situation, thus achieving precise control.

[0149] Assume in a typical usage scenario:

[0150] Cooking time Di = 5 minutes (300 seconds).

[0151] Current microwave intensity Li = 82.2 units (from the previous example).

[0152] Preset energy absorption standard value Rs = 0.6 °C / second.

[0153] Calculate the instantaneous energy absorption rate Rtn:

[0154] Assume that within a certain period of time, the temperature change of the food ΔTen = +3 °C.

[0155] Rtn = ΔTen / Di Rtn = 3 / 300 Rtn = 0.01 Rtn = 0.01

[0156] Therefore, within this period of time, the instantaneous energy absorption rate Rtn is 0.01 °C / second.

[0157] Determine the microwave intensity adjustment factor Fn:

[0158] Since Rtn < Rs, the system needs to increase the microwave intensity to meet the cooking requirements.

[0159] Fn = 82.2 * 0.59 Fn = 48.5 Fn = 48.5

[0160] Therefore, the microwave intensity adjustment factor Fn is 48.5 units.

[0161] Update the microwave intensity to Lin+1:

[0162] Lin+1 = Li + Fn Lin+1 = 82.2 + 48.5 Lin+1 = 130.7 Lin+1 = 130.7

[0163] Since the updated microwave intensity Lin+1 exceeds the preset upper limit Ul (eg, 120 units), the system should set the microwave intensity to the preset upper limit Ul=120 units.

[0164] Data Storage:

[0165] The system stores the updated microwave intensity Lin+1=120 units and the corresponding instantaneous energy absorption rate Rtn=0.01 in the memory location AdZ for subsequent evaluation and adjustment.

[0166] Step 6: According to the feedback information in step 5, the microwave output is reduced in a timely manner to avoid overcooking or drying, and to maintain the ideal cooking effect; specifically:

[0167] Based on the recorded data, the system analyzes the trend of the instantaneous energy absorption rate Rtn. If the Rtn value decreases for three consecutive times, the humidity protection response is triggered to prevent the food from being overheated and causing it to dry out or overcooked.

[0168] Based on the humidity protection response, the system calculates the humidity drop index Hdd through the formula Hdd=Rtn(n-3)-Rtn to evaluate the dryness of the food; it provides an objective measurement standard to determine whether the microwave intensity needs to be adjusted.

[0169] When the humidity drop index Hdd exceeds the preset threshold value Hsd, the system adjusts the current microwave intensity to Min+1 according to the formula Min+1=Lin+1*(1-Hdd / Hsd) to reduce the output to prevent overcooking; ensuring that the output is reduced to prevent overcooking while maintaining the ideal cooking effect.

[0170] The system saves the adjusted microwave intensity Min+1 together with the corresponding humidity drop index Hdd in the memory location AdZ, and continues to monitor the change of Rtn to ensure the cooking effect.

[0171] Formula Hdd = Rtn(n-3)-Rtn: This formula is used to calculate the humidity drop index (Hdd). It is based on the difference between the current instantaneous energy absorption rate Rtn and the energy absorption rate at the previous three time points, reflecting the drying rate of food over a period of time. A large negative value indicates that the drying speed is accelerated, prompting the system to take measures to prevent further drying.

[0172] Formula Min+1=Lin+1*(1-Hdd / Hsd): This formula is used to determine the new microwave intensity (Min+1). It is based on the current microwave intensity (Lin+1) and the proportional relationship between the humidity drop index (Hdd) and the preset threshold (Hsd). When Hdd exceeds Hsd, the system will reduce the microwave intensity. The closer the ratio is to 1, the greater the reduction; otherwise, the reduction is smaller. This method ensures that the adjustment of microwave intensity is neither too aggressive nor too delayed, achieving the best anti-drying effect.

[0173] Assume in a typical usage scenario:

[0174] The system recorded the following three consecutive instantaneous energy absorption rates Rtn:

[0175] Rtn(n-3)=0.05°C / sec

[0176] Rtn(n-2)=0.04°C / sec

[0177] Rtn(n-1)=0.03°C / sec

[0178] Current Rtn = 0.02°C / second

[0179] Triggering humidity protection response:

[0180] Since the Rtn value showed a decreasing trend for three consecutive times, the system triggered the humidity protection response.

[0181] Calculate the humidity drop index Hdd:

[0182] Hdd=Rtn(n-3)-RtnHdd=0.05-0.02Hdd=0.03Hdd=0.03

[0183] Therefore, during this period, the humidity drop index Hdd is 0.03°C / second.

[0184] Preset threshold Hsd:

[0185] Assume that the preset threshold value Hsd = 0.04°C / second.

[0186] Adjust the current microwave intensity to Min+1:

[0187] Assume that the current microwave intensity Lin+1=120 units (from the previous example).

[0188] Min+1=Lin+1*(1-Hdd / Hsd)Min+1=120*(1-0.03 / 0.04)Min+1=120*(1-0.75)Min+1=120*0.25Min+1=30Min+1=30

[0189] Therefore, the system adjusts the current microwave intensity to Min+1=30 units to reduce the output to prevent overcooking.

[0190] Data storage and monitoring:

[0191] The system stores the adjusted microwave intensity Min+1=30 units and the corresponding humidity drop index Hdd=0.03 in the memory location AdZ, and continues to monitor the change of Rtn to ensure the cooking effect.

[0192] Step 7: During step 6, if the food core temperature is detected to be close to the target value, the food is prepared to enter the heat preservation stage and reduce the energy supply; specifically:

[0193] During monitoring, the sensor detects the core temperature of the food, Tce, and compares it with the preset target temperature, Tge; ensuring that the system can accurately determine whether the food is close to the ideal cooking temperature.

[0194] When Tce reaches or approaches 90% of Tge, the system starts the insulation preparation program and calculates the remaining temperature difference Pwe according to the formula Pwe=Tge-Tce; to achieve a smooth transition from heating to insulation.

[0195] In order to smoothly transition to the insulation mode, the system determines the initial insulation microwave intensity Ib based on the remaining temperature difference Pwe through the formula Ib=Min+1*(Pwe / Tge), where Min+1 is the adjusted microwave intensity; ensuring that the microwave output in the insulation stage is neither too strong nor too weak, maintaining the ideal temperature of the food without continuing to overheat.

[0196] The system sets the current microwave output to the initial insulation microwave intensity Ib, and sets the insulation mode activation flag Kb to the on state, and records this state in the memory location AdZ to ensure that the system enters the insulation stage.

[0197] Formula Pwe=Tge-Tce: This formula is used to calculate the remaining temperature difference (Pwe). It is based on the preset target temperature (Tge) minus the current food core temperature (Tce), reflecting how far away the ideal cooking temperature is. A smaller Pwe means that the target temperature is close and less energy input is required; a larger Pwe means that more energy is still required to reach the target temperature.

[0198] Formula Ib=Min+1*(Pwe / Tge): This formula is used to determine the initial heat preservation microwave intensity (Ib). It is based on the adjusted microwave intensity (Min+1) and the proportional relationship between the remaining temperature difference (Pwe) and the target temperature (Tge). This method ensures that the adjustment of microwave intensity can meet the heat preservation requirements without overheating, achieving a gentle and stable heat preservation effect.

[0199] Assume in a typical usage scenario:

[0200] The preset target temperature Tge=75°C.

[0201] The current adjusted microwave intensity is Min+1=30 units (from the previous example).

[0202] Detect the food core temperature Tce:

[0203] Assume that at a certain point in time, the food core temperature detected by the sensor is Tce = 67.5°C (i.e. 90% of Tge).

[0204] Start the insulation preparation program and calculate the remaining temperature difference Pwe:

[0205] Pwe=Tge-TcePwe=75-67.5Pwe=7.5Pwe=7.5

[0206] Therefore, during this period, the residual temperature difference Pwe is 7.5°C.

[0207] Determine the initial heat preservation microwave intensity Ib:

[0208] Ib=Min+1*(Pwe / Tge)Ib=30*(7.5 / 75)Ib=30*0.1Ib=3Ib=3

[0209] Therefore, the system sets the current microwave output to the initial heat preservation microwave intensity Ib=3 units to ensure a mild heat preservation effect.

[0210] Set the keep warm mode and record the status:

[0211] The system sets the insulation mode activation flag Kb to the on state, and records the current state (including insulation microwave intensity Ib and activation flag Kb) in the memory location AdZ to ensure that the system officially enters the insulation stage.

[0212] This approach ensures that the device can smoothly switch to the keep warm mode when the food is close to the target temperature, avoiding overheating or temperature fluctuations, and providing ideal warming effect. In addition, by saving these parameters, users can review and analyze their cooking history in the future to further optimize their personal cooking habits.

[0213] Step 8: After entering the keep warm stage, the microwave cooking device automatically switches to the low-power keep warm mode until the user ends the operation or the time reaches the preset end point. Specifically:

[0214] After setting the initial insulation microwave intensity Ib and activating the insulation mode flag Kb, the system checks whether the user operation input Op or the timer Ti reaches the preset insulation time Tfi; ensuring that the insulation mode is started and terminated according to actual needs.

[0215] Based on the inspection results, if the user operation input Op is not detected and the timer Ti has not reached the preset insulation time Tfi, the low-power microwave intensity Lwi for maintaining insulation is calculated by the formula Lwi=Ib*0.7, and the current microwave output is updated to Lwi; energy consumption is reduced and the insulation time is extended.

[0216] The system operates continuously at low power microwave intensity Lwi and periodically verifies the user operation input Op or the timer Ti status to ensure that the keep warm mode is correctly executed; ensure that the keep warm mode is correctly executed to keep the food temperature stable.

[0217] When the user operation input Op is detected or the timer Ti reaches the preset insulation time Tfi, the system terminates the microwave output and restores the device to the standby state, clears the insulation mode activation flag Kb, and records the final state in the memory location AdZ.

[0218] Formula Lwi=Ib*0.7: This formula is used to calculate the low-power microwave intensity (Lwi) for maintaining heat preservation. It is based on the initial heat preservation microwave intensity (Ib) multiplied by an empirical proportional factor of 0.7 to ensure that the microwave output during the heat preservation stage is sufficient to maintain the temperature of the food without overheating. This method reduces energy consumption and maintains the ideal temperature of the food.

[0219] Assume in a typical usage scenario:

[0220] Initial holding microwave intensity Ib = 3 units (from previous example).

[0221] The preset holding time Tfi = 30 minutes (1800 seconds).

[0222] Check user operation input Op and timer Ti:

[0223] After the system sets the initial heat preservation microwave intensity Ib=3 units and activates the heat preservation mode flag Kb, it starts to check whether the user has any operation input Op or whether the timer Ti reaches the preset heat preservation time Tfi.

[0224] Assume that there is no user operation input Op at this time, and the timer Ti has not reached the preset insulation time Tfi.

[0225] Calculate the low power microwave intensity Lwi:

[0226] Lwi=Ib*0.7Lwi=3*0.7Lwi=2.1Lwi=2.1

[0227] Therefore, the system updates the current microwave output to the low-power microwave intensity Lwi=2.1 units to maintain the insulation state.

[0228] Run continuously and verify regularly:

[0229] The system operates continuously at low power microwave intensity Lwi = 2.1 units and periodically checks the status of the user input Op or the timer Ti to ensure that the keep warm mode is correctly executed and the food temperature is kept stable.

[0230] To terminate the keep warm mode and return to standby mode:

[0231] Assume that after a period of time, the timer Ti reaches the preset insulation time Tfi = 1800 seconds (or the user performs an operation input Op), the system will perform the following operations:

[0232] Terminate microwave output.

[0233] Return the device to standby mode.

[0234] Clear the keep warm mode activation flag Kb.

[0235] Record the final state in memory location AdZ.

[0236] This method ensures that the device can operate efficiently during the insulation stage and reduces unnecessary energy consumption, while providing a safe and reliable shutdown mechanism to ensure user experience and device safety.

[0237] On the other hand, the present invention provides a cooking control system for a microwave cooking appliance, such as Figure 2 As shown, including:

[0238] The startup and initialization module is used to detect the internal environmental parameters of the microwave cooking device when it is started, record the initial state, and select the corresponding preheating mode according to the type of food;

[0239] A preheating and stabilization control module, for gradually increasing the microwave intensity until a preset level is reached based on a selected preheating mode, while monitoring temperature changes, and when the temperature reaches a predetermined range, starting timing and maintaining the current microwave output stable;

[0240] Dynamic adjustment and protection module, used to evaluate the energy absorption status of food in real time, adjust microwave output through sensor feedback to meet cooking needs, and reduce microwave output in time according to feedback information. If the center temperature of food is close to the target value, it will enter the heat preservation stage and reduce energy supply;

[0241] The keep warm and end management module is used to automatically switch the microwave cooking device to a low-power keep warm mode after entering the keep warm stage until the user ends the operation or the time reaches a preset end point.

[0242] In addition, the above-mentioned startup and initialization module, preheating and stabilization control module, dynamic adjustment and protection module, and insulation and end management module are also used to implement other steps of the above-mentioned microwave cooking appliance cooking control method when executed, which will not be described one by one here.

[0243] In summary, the present invention introduces an intelligent detection and feedback control system, which can automatically adjust the microwave intensity at different stages of cooking, from preheating to stable heating to timely reducing power to prevent overcooking, and finally entering a low-power heat preservation mode. This method not only reduces unnecessary energy consumption, improves energy utilization efficiency and ensures better food cooking quality, but also achieves a more uniform and precise cooking process, thereby improving user satisfaction and food safety and quality.

[0244] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooking control method for a microwave cooking appliance, characterized in that: The following steps are involved: The microwave cooking device detects internal environmental parameters, records the initial state, and selects the corresponding preheating mode according to the type of food; Based on the selected preheating mode, gradually increase the microwave intensity until it reaches a preset level, while monitoring the temperature change, and when the temperature reaches a predetermined range, start timing and keep the current microwave output stable; Real-time evaluation of the energy absorption status of food, and adjustment of microwave output to meet cooking needs through sensor feedback, including: During cooking, continuously monitoring the temperature change of food and calculating the instantaneous energy absorption rate; comparing with the preset energy absorption standard value, if the instantaneous energy absorption rate is less than the standard value, determining the microwave intensity adjustment factor; combining the current microwave intensity with the adjustment factor to update the microwave intensity; recording the updated microwave intensity and the corresponding instantaneous energy absorption rate, and using them for subsequent evaluation and adjustment; According to the feedback information, the microwave output is reduced in a timely manner, including: analyzing the trend of the instantaneous energy absorption rate, if it decreases for three consecutive times, the humidity protection response is triggered; by comparing the instantaneous energy absorption rate, the dryness of the food is evaluated; when the dryness exceeds the preset threshold, the current microwave intensity is adjusted to reduce the output to prevent overcooking; the adjusted microwave intensity is saved together with the corresponding dryness, and the change of the instantaneous energy absorption rate is continuously monitored; if the center temperature of the food is monitored to be close to the target value, it is prepared to enter the heat preservation stage and reduce the energy supply; After entering the keep warm stage, the microwave cooking device automatically switches to the low-power keep warm mode until the user ends the operation or the time reaches the preset end point.

2. A cooking control method for a microwave cooking appliance according to claim 1, characterized in that: The microwave cooking device detects internal environmental parameters and records the initial state, including: At the moment the microwave cooking device is turned on, the sensor reads the current temperature and humidity as basic values; Then the comprehensive environmental factor is calculated, which is based on the sum of the initial temperature and humidity; According to the obtained comprehensive environmental coefficient, the preliminary microwave intensity is determined, and the preliminary microwave intensity is proportional to the environmental coefficient; Store preliminary microwave intensity and initial temperature in memory location.

3. A cooking control method for a microwave cooking appliance according to claim 2, characterized in that: The method of selecting a corresponding preheating mode according to the type of food includes: The user enters or selects a food category identifier; The system queries the preset database to obtain the corresponding preheating mode parameters; Determine the final preheating microwave intensity by combining the selected food category identifier and the determined preliminary microwave intensity; The system sets the microwave output to the final preheating microwave intensity and starts the preheating procedure, while saving the relevant parameters in the memory location.

4. A cooking control method for a microwave cooking appliance according to claim 3, characterized in that: The method of gradually increasing the microwave intensity until a preset level is reached based on the selected preheating mode while monitoring the temperature change comprises: After setting the final preheat microwave intensity, the system increases the current microwave output in fixed increments, waiting for a stabilization period after each increase; The sensor records the internal temperature after each adjustment and calculates the rate of temperature change; When the temperature change rate is lower than the preset threshold, the system determines that it is close to the preset temperature range and adjusts the new microwave intensity; If the new microwave intensity does not exceed the preset upper limit, the current microwave output is updated and monitoring continues until the preset condition is reached.

5. A cooking control method for a microwave cooking appliance according to claim 4, characterized in that: When the temperature reaches a predetermined range, starting timing and maintaining the current microwave output stable comprises: When the internal temperature reaches the lower limit of the preset range, the timer is started to record the cooking time; Based on the cooking time, the cumulative energy input is calculated; Activate the stirring device rotation angle and adjust the rotation frequency according to the cooking time; The system continuously monitors internal temperature changes and evaluates the overall energy effect.

6. The cooking control method of a microwave cooking appliance according to claim 1, characterized in that: If the food core temperature is detected to be close to the target value, the food is prepared to enter the heat preservation stage and reduce the energy supply, including: During monitoring, the sensor detects the core temperature of the food and compares it with the preset target temperature; When the food core temperature reaches or approaches 90% of the target temperature, the heat preservation preparation program is started and the remaining temperature difference is calculated; In order to smoothly transition to the heat preservation mode, the initial heat preservation microwave intensity is determined according to the remaining temperature difference; Set the current microwave output to the initial insulation microwave intensity, set the insulation mode activation flag, and record this state to ensure that the system enters the insulation stage.

7. A cooking control method for a microwave cooking appliance according to claim 6, characterized in that: After entering the heat preservation stage, the microwave cooking device automatically switches to the low-power heat preservation mode until the user ends the operation or the time reaches a preset end point, including: After setting the initial heat preservation microwave intensity and activating the heat preservation mode flag, checking whether the user operation input or the timer reaches the preset heat preservation time; If no user operation is detected and the timer has not reached the preset keeping warm time, the low-power microwave intensity for maintaining keeping warm is calculated and the current microwave output is updated; The system operates continuously at low microwave intensity and periodically verifies user action or timer status to ensure that the keep warm mode is executing correctly; When a user operation is detected or the timer reaches the preset keeping warm time, the microwave output is terminated and the device is restored to the standby state. At the same time, the keeping warm mode activation flag is cleared and the final state is recorded.

8. A cooking control system for a microwave cooking appliance for implementing the method according to any one of claims 1 to 7, characterized in that: include: The startup and initialization module is used to detect the internal environmental parameters of the microwave cooking device when it is started, record the initial state, and select the corresponding preheating mode according to the type of food; A preheating and stabilization control module, for gradually increasing the microwave intensity until a preset level is reached based on a selected preheating mode, while monitoring temperature changes, and when the temperature reaches a predetermined range, starting timing and maintaining the current microwave output stable; The dynamic adjustment and protection module is used to evaluate the energy absorption status of food in real time, and adjust the microwave output through sensor feedback to meet cooking needs, specifically including: during cooking, continuously monitor the temperature change of food and calculate the instantaneous energy absorption rate; compare with the preset energy absorption standard value, if the instantaneous energy absorption rate is less than the standard value, determine the microwave intensity adjustment factor; combine the current microwave intensity with the adjustment factor to update the microwave intensity; record the updated microwave intensity and the corresponding instantaneous energy absorption rate, and use them for subsequent evaluation and adjustment; according to the feedback information, timely reduce the microwave output, specifically including: analyze the trend of the instantaneous energy absorption rate, if it decreases for three consecutive times, trigger the humidity protection response; evaluate the dryness of food by comparing the instantaneous energy absorption rate; when the dryness exceeds the preset threshold, adjust the current microwave intensity and reduce the output to prevent overcooking; save the adjusted microwave intensity together with the corresponding dryness, and continue to monitor the change of the instantaneous energy absorption rate; if the center temperature of the food is detected to be close to the target value, prepare to enter the insulation stage and reduce the energy supply; The keep warm and end management module is used to automatically switch the microwave cooking device to a low-power keep warm mode after entering the keep warm stage until the user ends the operation or the time reaches a preset end point.

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