AI-based intelligent digital control system for range hoods

Abstract

This invention discloses an intelligent digital control system for a range hood based on artificial intelligence, belonging to the field of intelligent control technology. It includes a monitoring module, an intelligent control module, a data storage module, a visualization module, and a user terminal module. The monitoring module detects environmental information and range hood operating data through sensor devices. The intelligent control module includes a range hood start / stop control unit, a smoke extraction power adjustment unit, a range hood efficiency evaluation unit, and a power correction unit. It features real-time monitoring of smoke concentration and setting thresholds to achieve intelligent start / stop. The smoke extraction power adjustment unit dynamically adjusts the power according to changes in smoke concentration, ensuring effective smoke extraction and reducing energy consumption. The range hood efficiency evaluation unit assesses the purification effect through operating deviation rate, automatically adjusts the power, and reminds the user to perform maintenance, avoiding reliance on subjective judgment or periodic cleaning, thus improving the intelligence level and working quality of the range hood and enhancing the user experience.

Description

Technical Field

[0001] This invention relates to the field of intelligent control technology, specifically to an intelligent digital control system for a range hood based on artificial intelligence. Background Technology

[0002] Cooking and stir-frying in the kitchen produce a lot of fumes, which can harm human health and pollute the indoor environment. Therefore, people commonly use range hoods to purify kitchen air and improve indoor air quality. The control system of a range hood is used to control its operation and adjust its parameters.

[0003] However, current kitchen range hood control systems only control the range hood's speed by dividing it into different levels based on preset thresholds. This makes it difficult to intelligently adjust according to real-time changes in the environment and the concentration of cooking fumes, resulting in untimely removal of fumes or wasted energy. Although there are control systems and methods for kitchen range hoods disclosed in Chinese patent CN202310660641.9, this range hood control method extracts the multi-scale correlation feature distribution representation of temperature value and range hood speed value in the time dimension, and uses this to perform decoding regression to obtain the range hood speed value, thereby enabling real-time control of the range hood, improving the control accuracy of the range hood, and better improving the emission effect of cooking fumes.

[0004] However, as range hoods are used over time, pollutants gradually accumulate on the inner walls of the ducts and filters, which restricts airflow and reduces the efficiency of the range hood. Currently, range hoods are usually cleaned based on the user's subjective feelings or periodic cleaning, lacking intelligent assessment of the range hood's purification efficiency, which affects the user experience. Summary of the Invention

[0005] The purpose of this invention is to provide an intelligent digital control system for oil-removing range hoods based on artificial intelligence, which solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an intelligent digital control system for a range hood based on artificial intelligence, comprising a monitoring module, an intelligent control module, a data storage module, a visualization module, and a user terminal module;

[0007] The monitoring module detects environmental information and range hood operating data through sensor devices;

[0008] The intelligent control module includes a range hood start / stop control unit, a smoke extraction power adjustment unit, a range hood efficiency evaluation unit, and a power correction unit.

[0009] The range hood start / stop control unit is used to analyze environmental information to obtain the average smoke concentration, set start and stop thresholds for the range hood, compare the average smoke concentration with the start and stop thresholds, and control the start and stop of the range hood based on the comparison results.

[0010] The smoke extraction power adjustment unit is used to compare and analyze the average smoke concentration over different time periods after the range hood is started, obtain the average smoke concentration change rate, and dynamically adjust the output power of the range hood according to the average smoke concentration change rate.

[0011] The range hood efficiency evaluation unit is used to analyze environmental information before and after the range hood is started to determine the actual purification effect of the range hood.

[0012] The power correction unit determines the ideal purification effect of the range hood based on its design parameters, analyzes the actual purification effect and the ideal purification effect together, and further adjusts the output power of the range hood.

[0013] Optionally, the range hood start-stop control unit obtains the smoke concentration at each time point in the current time period and the historical time period from the environmental information, adds up the smoke concentration at each time point and divides by the number of time points to obtain the average smoke concentration in the current time period and the average smoke concentration in the historical time period.

[0014] Set start-up and stop-down thresholds for the range hood;

[0015] The range hood turns on when the average smoke concentration during the current time period exceeds the activation threshold.

[0016] The range hood will turn off when the average smoke concentration during the current time period is less than the shutdown threshold.

[0017] The range hood's on / off control unit analyzes the smoke concentration at different time points to obtain the average smoke concentration, and then determines whether the range hood should be turned on or off based on the average smoke concentration. This eliminates the need for repeated manual operation of the range hood, thus improving its level of intelligence.

[0018] Optionally, the smoke extraction power adjustment unit subtracts the average smoke concentration of the historical time period from the average smoke concentration of the current time period to obtain the average concentration difference, then divides the average concentration difference by the average smoke concentration of the historical time period to obtain the smoke change rate, obtains the historical output power through the range hood operating data, obtains the humidity data through the environmental information, and combines the smoke change rate, the historical output power and the humidity data to adjust the range hood power.

[0019] By intelligently adjusting based on real-time changes in the environment and oil fume concentration, the system ensures effective oil fume purification while reducing energy consumption and lowering operating costs.

[0020] Optionally, the range hood efficiency evaluation unit compares and analyzes the data before and after the range hood purification to obtain the actual working efficiency of the range hood, obtains the operating time of the range hood through the range hood operating data, and combines the actual working efficiency of the range hood with the operating time of the range hood to obtain the sewage discharge data.

[0021] By analyzing the actual working efficiency and emissions data of range hoods, users can understand the actual working quality and environmental contribution of the range hoods.

[0022] Optionally, the power correction unit obtains the design efficiency of the range hood through the design parameters of the range hood, compares the actual working efficiency of the range hood with the design working efficiency of the range hood to obtain the working deviation rate, sets a corresponding threshold for the working deviation rate, and determines whether to correct the power of the range hood and clean the range hood.

[0023] The system determines whether cleaning is needed by checking the operating deviation rate, eliminating the need to rely on the user's subjective feelings or to clean the range hood regularly. This ensures the working quality of the range hood and improves its level of intelligence.

[0024] Optionally, the visualization module is used to visualize the data generated during the operation of the monitoring module and the intelligent control module, so that users can intuitively understand the working status of the range hood.

[0025] Optionally, the user terminal module includes a wireless communication unit and an application. The user downloads the application through the terminal device and communicates with the range hood through the wireless communication unit, enabling remote viewing of the range hood's working status and remote control of the range hood through the application.

[0026] Optionally, the wireless communication unit includes at least one communication module, which includes Wi-Fi, Bluetooth, and Zigbee, and the communication module is capable of supporting data transmission between the range hood and the terminal device.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] I. This invention achieves intelligent start-up and shut-down by real-time monitoring of smoke concentration and setting relevant thresholds to control the opening and closing of the range hood. This eliminates the need for manual, repeated opening and closing of the range hood. By calculating the average smoke concentration, it avoids frequent accidental and missed starts and stops, making the control of the range hood more accurate and stable. Furthermore, the smoke extraction power adjustment unit adjusts the range hood power in real time according to changes in smoke concentration. This allows the range hood to maintain a lower power output at low smoke concentrations and increase power when smoke concentrations rise, achieving dynamic adjustment of the range hood's output power. This ensures smoke extraction quality while avoiding energy waste, and eliminates the need for manual adjustments by the user, making the range hood more intelligent and improving user comfort.

[0029] Second, this invention analyzes the actual purification effect of the range hood compared with the designed purification effect through a range hood efficiency evaluation unit to obtain the working deviation rate. A threshold is set for the working deviation rate, and the power of the range hood is further adjusted. By evaluating the current working quality of the range hood, the purification effect of the range hood is guaranteed. When the working deviation rate is too large, the user is reminded to perform timely maintenance. There is no need to rely on the user's subjective feeling or regular cleaning of the range hood, which improves the intelligence level of the range hood and ensures the working quality of the range hood. Attached Figure Description

[0030] Figure 1 This is a block diagram of the system structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the intelligent control module of the present invention. Detailed Implementation

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] Example 1, please refer to Figure 1 and Figure 2 This implementation provides an intelligent digital control system for a range hood based on artificial intelligence, including a monitoring module, an intelligent control module, a data storage module, a visualization module, and a user terminal module;

[0034] The monitoring module detects environmental information and range hood operating data through sensor devices;

[0035] The intelligent control module includes a range hood start / stop control unit, a smoke extraction power adjustment unit, a range hood efficiency evaluation unit, and a power correction unit;

[0036] The range hood start / stop control unit is used to analyze environmental information to obtain the average smoke concentration, set start and stop thresholds for the range hood, compare the average smoke concentration with the start and stop thresholds, and control the start and stop of the range hood based on the comparison results.

[0037] The smoke extraction power adjustment unit is used to compare and analyze the average smoke concentration over different time periods after the range hood is turned on, obtain the average smoke concentration change rate, and dynamically adjust the output power of the range hood based on the average smoke concentration change rate.

[0038] The range hood efficiency evaluation unit is used to analyze environmental information before and after the range hood is turned on to determine the actual purification effect of the range hood.

[0039] The power correction unit determines the ideal purification effect of the range hood based on its design parameters, analyzes the actual purification effect and the ideal purification effect together, and further adjusts the output power of the range hood.

[0040] In this embodiment, the monitoring module monitors environmental information and range hood operation data in real time. The environmental information includes data such as smoke concentration and air humidity. In conjunction with the intelligent control module, the range hood start-stop control unit analyzes the smoke concentration at different time points to obtain the average smoke concentration. Then, based on the average smoke concentration, it determines whether to start or stop the range hood, thereby realizing automatic start-stop of the range hood without the need for repeated manual operation, thus improving the intelligence level of the range hood.

[0041] During the operation of the range hood, the smoke extraction power adjustment unit in the intelligent control module compares and analyzes the average smoke concentration over different time periods to obtain the average smoke concentration change rate. Based on the average smoke concentration change rate, the range hood's output power is dynamically adjusted. When the smoke concentration is high, the range hood's output power is increased, and vice versa. This achieves intelligent adjustment based on real-time changes in the environment and smoke concentration, ensuring smoke purification effect while reducing energy consumption and lowering operating costs.

[0042] The system then analyzes environmental information before and after purification using the range hood efficiency evaluation unit to determine the actual purification effect. By comparing the actual purification effect with the designed purification effect, the system calculates the working deviation rate, which in turn assesses the current working quality of the range hood. When the working deviation rate is too large, the system alerts the user, allowing for timely maintenance without relying on the user's subjective feelings or regular cleaning. This improves the intelligence level of the range hood. After determining the actual purification effect, the system combines this with the daily operating time of the range hood to determine the daily reduction in pollutants, giving users a direct understanding of the range hood's emission reduction effect.

[0043] The range hood's output power is then adjusted based on the working deviation rate. Only when the working deviation rate exceeds a set threshold will further adjustments to the range hood's output power be initiated. This ensures the range hood's purification effect while avoiding system instability caused by frequent fluctuations in power, thus improving the user experience. Furthermore, the system determines whether the range hood needs cleaning based on a set threshold, eliminating the need for users to rely on subjective feelings or regular cleaning, thereby ensuring the range hood's working quality and enhancing its level of intelligence.

[0044] Furthermore, the range hood's on / off control unit obtains the smoke concentration at each point in the current and historical time periods from the environmental information, adds up the smoke concentration at each point in time, and then divides by the number of time points to obtain the average smoke concentration at the current time period and the average smoke concentration at the historical time period.

[0045] Based on current kitchen exhaust system design specifications and air quality standards, set the start threshold Y1 and shut-off threshold Y2 for the range hood;

[0046] The calculation process for the average smoke concentration in the current time period is as follows:

[0047]

[0048] Where D(T) avg The average smoke concentration for the current time period T;

[0049] D i Let be the smoke concentration at time point i;

[0050] n represents the number of time points within the current time period T;

[0051] The current time period T represents a time range, such as 10 minutes, 1 minute, or a few seconds. Time point i represents a specific point within the time range, such as the first second, the second second, etc. The smoke concentration D at each time point i is recorded. i Summing these values ​​and dividing by the number of time points n yields the average smoke concentration D(T) for the current time period T. avg ,

[0052] The calculation process for the average smoke concentration over a historical period is as follows:

[0053]

[0054] Where D(T-1) avg The average smoke concentration over the historical time period T-1;

[0055] D j Let J be the smoke concentration at time point j.

[0056] m represents the number of time points in the historical time period T-1;

[0057] Specifically, the average smoke concentration D(T) during the current time period T. avg When the power output exceeds the start-up threshold Y1, the range hood turns on. At this time, the range hood output power is the system's preset initial output power, which is the minimum power of the range hood in operation.

[0058] The average smoke concentration D(T) during the current time period T. avg The range hood will turn off when the value is less than the shutdown threshold Y2.

[0059] By monitoring the smoke concentration in real time and setting relevant thresholds to control the opening and closing of the range hood, an intelligent opening and closing effect is achieved. There is no need to manually turn the range hood on and off repeatedly, saving time and allowing users to concentrate on cooking. It ensures that the smoke is removed in a timely manner. By calculating the average smoke concentration, it can avoid frequent accidental opening and closing or missed opening and closing of the range hood, making the control of the range hood more accurate and stable.

[0060] Furthermore, the smoke extraction power adjustment unit subtracts the average smoke concentration of the historical time period from the average smoke concentration of the current time period to obtain the average concentration difference. Then, it divides the average concentration difference by the average smoke concentration of the historical time period to obtain the smoke change rate. Historical output power is obtained from the range hood's operating data, and humidity data is derived from environmental information. The smoke change rate, historical output power, and humidity data are combined to obtain the adjusted output power. The system then adjusts the range hood based on the adjusted output power. The adjustment process is as follows:

[0061] P adj =P(T-1)×(1+R) smoke )×β×WH

[0062] Where P adj To adjust the output power;

[0063] P(T-1) represents the output power during time period T-1;

[0064] R smoke The rate of change of smoke concentration represents the difference in average smoke concentration over different time periods.

[0065] β is the influence coefficient of the smoke change rate, with a value of 1;

[0066] The rate of change of smoke R smoke Adding one and multiplying it by the output power P(T-1) over the time period T-1 can represent the output power that the range hood should achieve under the current smoke concentration. Multiplying it by the smoke change rate influence coefficient β can represent the adjustment level of the range hood power.

[0067] WH is the humidity influence coefficient, which represents the impact of ambient humidity on the working efficiency of the range hood;

[0068] Smoke Change Rate R smoke The process of obtaining the result is as follows:

[0069]

[0070] D(T) avg The average smoke concentration for the current time period T;

[0071] D(T-1) avg The average smoke concentration over the historical time period T-1;

[0072] The average smoke concentration D(T) during the current time period T. avg Subtract the average smoke concentration D(T-1) over the historical time period T-1. avg This represents the difference in average smoke concentration between two time periods. If the difference in average smoke concentration is greater than 1, it indicates an increase in smoke concentration, and the rate of change of smoke concentration is R. smoke A positive result indicates a decrease in smoke concentration; a result less than 1 indicates a decrease in smoke concentration. The smoke change rate R... smoke The result is negative.

[0073] The process of deriving the humidity influence coefficient WH is as follows:

[0074]

[0075] H represents relative humidity;

[0076] H opt The optimal operating humidity for a range hood is determined based on its design parameters. This humidity level indicates that the range hood achieves its maximum purification rate and performs best under these conditions. When the humidity deviates from the optimal operating humidity, the range hood's performance will decrease.

[0077] Subtract the optimal operating humidity of the range hood from the relative humidity H. opt It can obtain the humidity difference value, square it to ensure that the result is a positive number, and indicate that when the humidity is close to the optimal value, the influence of humidity gradually slows down, so that the influence of humidity on the power of the range hood tends to be smooth.

[0078] k is a constant that controls the effect of humidity on output power, ranging from 0 to 1, indicating the deviation of humidity from the optimal operating humidity H of the range hood. opt The magnitude of changes in the working efficiency of the range hood;

[0079] When the relative humidity H is closer to the optimal operating humidity H of the range hood opt The lower the humidity, the less impact humidity has on power, because when the humidity is too low, the smoke particles are lighter and diffuse faster, resulting in higher smoke extraction efficiency, and the power requirement of the range hood can be reduced accordingly.

[0080] Conversely, the further the relative humidity H deviates from the optimal operating humidity H... opt At higher humidity levels, the range hood requires more power because humidity increases the viscosity of the air, making smoke particles heavier and affecting the range hood's adsorption efficiency.

[0081] Specifically, the range hood's power can be adjusted in real time based on changes in smoke concentration. This allows the range hood to maintain a low power output when the smoke concentration is low and increase the power appropriately when the smoke concentration rises, ensuring environmental comfort. This achieves dynamic adjustment of the range hood's output power, ensuring smoke extraction quality while avoiding energy waste. At the same time, it eliminates the need for manual adjustment by the user, making the range hood more intelligent and improving user comfort.

[0082] More specifically, since humidity not only affects the diffusion of smoke but also the smoke extraction efficiency of the range hood, introducing humidity as a factor makes the power adjustment of the range hood more in line with the actual situation, thereby improving the accuracy of the power adjustment of the range hood.

[0083] Furthermore, the range hood efficiency evaluation unit compares and analyzes the data before and after the range hood purification process to obtain the actual working efficiency of the range hood. It then uses the range hood's operating data to determine the operating time and combines the actual working efficiency with the operating time to obtain the sewage discharge data.

[0084] The analysis process of the actual working efficiency of the range hood is as follows:

[0085]

[0086] Where E act This represents the actual purification rate of the range hood.

[0087] DL in This refers to the amount of oil fume entering the range hood's air inlet.

[0088] DL out This refers to the amount of oil fumes emitted from the range hood's exhaust vent.

[0089] Specifically, the amount of cooking fumes is calculated by multiplying the fume concentration by the airflow rate, and the actual purification rate E of the range hood is then obtained. act It can assess the current working quality of the range hood, and the actual purification rate E of the range hood. act The closer the value is to 1, the better the purification effect of the range hood; conversely, the lower the value is, the worse the purification effect.

[0090] Based on the actual purification rate E of the range hood act The system can analyze the daily emission reduction of range hoods. The analysis process is as follows:

[0091] L x =Q air ×T work ×E act ×B x

[0092] Where L x Let x be the amount of emission reduction for pollutant x;

[0093] Q airThe emission rate of the range hood is expressed in cubic meters (m³). 3 / min;

[0094] T work This refers to the operating time of the range hood;

[0095] The emission Q of the range hood air And the working time of the range hood (T) work Multiplying them together gives the total emissions of the range hood and the operating time T. work Take the daily operating time of the range hood and compare the total emissions of the range hood with its actual purification rate E. act Multiplying them together gives the total emission reduction.

[0096] B x The percentage of pollutant x in the smoke;

[0097] Since smoke contains a variety of pollutants, each with a different proportion, the emission reduction for each pollutant can be obtained by multiplying the total emission reduction by the proportion of each pollutant.

[0098] Pollutants include VOCs, NMHCs, and CO2.

[0099] When x is set to 1, the pollutant is carbon dioxide. By calculating the proportion of carbon dioxide in the smoke, B1, the carbon dioxide emission reduction L1 can be obtained. Based on the carbon credit mechanism, users are given points, such as 1 kg of carbon dioxide emission reduction L1 = 10 points. An points mall is set up in the above application, where users can redeem goods based on their points, thereby incentivizing users to use the range hood. In practical applications, dynamic rewards can be set up, such as increasing the points redeemed for 1 kg of carbon dioxide emission reduction L1 by 15% when a user uses the range hood to reduce emissions for more than seven consecutive days, further incentivizing users to use the range hood for long-term emission reduction.

[0100] Specifically, when calculating the actual purification rate E of the range hood... act Afterwards, it can analyze the emissions of each pollutant, allowing users to intuitively understand the working effect of the range hood.

[0101] Furthermore, the power correction unit derives the design efficiency of the range hood from its design parameters and the actual efficiency from its operating data. It then compares the actual efficiency with the design efficiency to determine the deviation rate. When the deviation rate is too large, it corrects the smoke change rate influence coefficient β in the smoke extraction power adjustment unit. The specific process is as follows:

[0102]

[0103] Nβ is the coefficient of influence of the rate of change of new smoke;

[0104] The working deviation rate represents the difference between the actual purification effect of the range hood and the purification effect when it leaves the factory.

[0105] E act This represents the actual purification rate of the range hood.

[0106] E ide The purification rate of a range hood is designed based on its design parameters, and may vary from brand to brand.

[0107] When the work deviation rate When the value is less than 1, it means that the actual smoke extraction effect of the range hood is lower than the design value. If the range hood continues to run, the smoke concentration will continue to increase, affecting the user experience. In this case, the power of the range hood should be increased.

[0108] Because the system adjustment process itself generates some energy loss, such as frequently adjusting the range hood fan speed and heating power, it leads to energy waste. In actual operation, in order to ensure the range hood's working efficiency while avoiding frequent adjustments to its output power, when... The power correction unit makes corrections only when necessary, which avoids overreacting to minor changes and prevents energy loss and potential overheating caused by frequent adjustments to the range hood power. This improves system stability and ensures the range hood operates efficiently and stably.

[0109] when If the actual smoke extraction effect of the range hood differs significantly from its designed effect, it indicates a problem inside the range hood, possibly due to long-term dust accumulation, filter blockage, or malfunction of other important components. In this case, the equipment's smoke extraction effect is significantly reduced, and it cannot effectively remove fumes. While adjusting the range hood's power, the user will be notified to have the range hood inspected.

[0110] When the work deviation rate is less than 1 Greater than 1, and When the rate of change of new smoke, Nβ, is greater than the rate of change of smoke, β, the rate of change of new smoke, Nβ, is then incorporated into the smoke extraction power adjustment unit, and the output power P is adjusted accordingly. adj Increase;

[0111] When the work deviation rate is greater than 1 Less than 1, and When the rate of change of new smoke is less than the rate of change of smoke (β), the influence coefficient Nβ is substituted into the smoke extraction power adjustment unit, and the output power P is adjusted accordingly. adj Generally speaking, the actual purification rate (E) of a range hood decreases with use. act Will decrease.

[0112] Specifically, by calculating the working deviation rate, the output power of the range hood is further corrected. This takes into account the actual working conditions of the range hood, avoiding the problem that the system cannot respond in time when the smoke extraction effect decreases due to prolonged use of the range hood. Furthermore, when the actual smoke extraction effect of the range hood is too poor, it can promptly remind the user to clean or replace parts, ensuring the smoke extraction effect of the range hood and improving the user's comfort.

[0113] Furthermore, the visualization module is used to visualize the data generated during the operation of the monitoring module and the intelligent control module, so that users can intuitively understand the working status of the range hood.

[0114] Specifically, the operating data of the range hood is analyzed, and smoke concentration trend charts and humidity fluctuation charts are generated by using smoke concentration and humidity data to help users understand the dynamic changes in the working environment of the range hood. Compared with numbers, the chart format allows users to understand the specific situation of the range hood more clearly and quickly.

[0115] Furthermore, the user terminal module includes a wireless communication unit and an application. Users can download the application through the terminal device and communicate with the range hood through the wireless communication unit. They can remotely view the working status of the range hood and remotely control the range hood through the application. Users can monitor and control the working status of the range hood anytime and anywhere and can intuitively understand the working effect of the range hood.

[0116] By recording the frequency of the range hood's on and off, the number of times a user cooks in a day can be estimated. For example, each time the range hood is turned on for a period of time can be considered as one cooking activity.

[0117] Estimate the cooking time for each meal by monitoring the start and stop times of the range hood.

[0118] By combining data analysis of the amount and composition of smoke drawn into the range hood, the system determines the user's dietary habits. Based on this analysis, the system will provide healthy eating suggestions in conjunction with the internet, and offer advice on how to reduce smoke emissions, making the range hood user experience more intelligent and personalized.

[0119] Furthermore, the average smoke concentration during the current time period and the average smoke concentration during historical time periods are analyzed to obtain the peak smoke concentration. Based on the peak smoke concentration and the health tolerance threshold, the user's dietary habits are determined and the user's dietary habits are divided into healthy steaming and boiling type, normal cooking type, and heavy oil stir-fry type. Lifestyle suggestions for different dietary habits are sent to the user's terminal device through the application.

[0120] When the peak smoke concentration is greater than 500 μg / m³ 3If a user cooks more than half of their total cooking frequency within a month, they are considered a heavy-oil stir-fry user.

[0121] For users who prefer stir-frying with heavy oil, the app can provide lifestyle suggestions to ensure their health. For example, the cold pan and cold oil method can lower the oil temperature by 50-80℃, which can effectively reduce PM2.5 emissions. Refined soybean oil has a smoke point of ≥230℃, which reduces the amount of oil fumes generated by 40% compared to extra virgin olive oil with a smoke point of 160℃.

[0122] When the peak smoke concentration is between 200-500 μg / m³ 3 If a user's cooking frequency exceeds half of the total number of cooking sessions within a month, they are considered a normal cooking user.

[0123] For users who cook normally, they should be encouraged to switch to healthy steaming and boiling methods. Recommending steamed, boiled, or stewed dishes to users through the app can help reduce oil fume emissions and improve the nutritional value of the diet.

[0124] When the peak smoke concentration is less than 200 μg / m³ 3 If a user cooks more than half of the total number of times they cook within a month, they are considered a healthy steaming / cooking user.

[0125] For healthy steaming and boiling methods, we should encourage people to maintain a healthy diet and provide more low-oil and low-fat recipes to further optimize their dietary structure and maintain dietary diversity.

[0126] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An intelligent digital control system for a range hood based on artificial intelligence, characterized in that: It includes a monitoring module, an intelligent control module, a data storage module, a visualization module, and a user terminal module; The monitoring module detects environmental information and range hood operating data through sensor devices; The intelligent control module includes a range hood start / stop control unit, a smoke extraction power adjustment unit, a range hood efficiency evaluation unit, and a power correction unit. The range hood start / stop control unit is used to analyze environmental information to obtain the average smoke concentration, set start and stop thresholds for the range hood, compare the average smoke concentration with the start and stop thresholds, and control the start and stop of the range hood based on the comparison results. The smoke extraction power adjustment unit is used to compare and analyze the average smoke concentration over different time periods after the range hood is started, obtain the average smoke concentration change rate, and dynamically adjust the output power of the range hood according to the average smoke concentration change rate. The range hood efficiency evaluation unit is used to analyze environmental information before and after the range hood is started to determine the actual purification effect of the range hood. The user terminal module includes a wireless communication unit and an application. The user downloads the application through the terminal device and communicates with the range hood through the wireless communication unit to remotely view the working status of the range hood and remotely control the range hood through the application. The range hood efficiency evaluation unit compares and analyzes the data before and after the range hood purification process to obtain the actual working efficiency of the range hood. It then uses the range hood operating data to determine the operating time of the range hood and combines the actual working efficiency of the range hood with the operating time to obtain the sewage discharge data. The analysis process of the actual working efficiency of the range hood is as follows: Where E act This represents the actual purification rate of the range hood. DL in This refers to the amount of oil fume entering the range hood's air inlet. DL out This refers to the amount of oil fumes emitted from the range hood's exhaust vent. Based on the actual purification rate E of the range hood act Assess the current working quality of the range hood, and determine its actual purification rate E. act The closer the value is to 1, the better the range hood's purification effect; conversely, the lower the value is, the worse the effect. Based on the actual purification rate E of the range hood act The daily emission reduction of the range hood was analyzed, and the analysis process is as follows: Where L x Let x be the amount of emission reduction for pollutant x; Q air The emission rate of the range hood is expressed in cubic meters (m³). 3 / min; T work This refers to the operating time of the range hood; The emission Q of the range hood air And the working time of the range hood (T) work Multiply them to get the total emissions from the range hood; B x The percentage of pollutant x in the smoke; Pollutants include VOCs, NMHCs, and CO2; By analyzing the proportion of each pollutant in the pollution discharge data, the user's carbon emission reduction is obtained. Based on the user's carbon emission reduction and with reference to the carbon credit mechanism, points are awarded to the user. A points mall is set up in the application, and users can redeem goods in the points mall based on their points. The power correction unit determines the ideal purification effect of the range hood based on its design parameters, analyzes the actual purification effect and the ideal purification effect together, and further adjusts the output power of the range hood.

2. The intelligent digital control system for a range hood based on artificial intelligence according to claim 1, characterized in that: The range hood start / stop control unit obtains the smoke concentration at each time point in the current time period and the historical time period from the environmental information, adds up the smoke concentration at each time point and divides it by the number of time points to obtain the average smoke concentration in the current time period and the average smoke concentration in the historical time period. Set start-up and stop-down thresholds for the range hood; The range hood turns on when the average smoke concentration during the current time period exceeds the activation threshold. The range hood will turn off when the average smoke concentration during the current time period is less than the shutdown threshold.

3. The intelligent digital control system for a range hood based on artificial intelligence according to claim 2, characterized in that: The smoke extraction power adjustment unit subtracts the average smoke concentration of the historical time period from the average smoke concentration of the current time period to obtain the average concentration difference, and then divides the average concentration difference by the average smoke concentration of the historical time period to obtain the smoke change rate. The historical output power is obtained through the range hood operating data, and the humidity data is obtained through the environmental information. The range hood power is adjusted by combining the smoke change rate, the historical output power, and the humidity data.

4. The intelligent digital control system for a range hood based on artificial intelligence according to claim 3, characterized in that: The power correction unit obtains the design efficiency of the range hood through the design parameters of the range hood, compares the actual working efficiency of the range hood with the design working efficiency to obtain the working deviation rate, sets a corresponding threshold for the working deviation rate, and determines whether to correct the power of the range hood and clean the range hood.

5. The intelligent digital control system for a range hood based on artificial intelligence according to claim 4, characterized in that: The visualization module is used to visualize the data generated during the operation of the monitoring module and the intelligent control module, so that users can intuitively understand the working status of the range hood.

6. The intelligent digital control system for a range hood based on artificial intelligence according to claim 5, characterized in that: The wireless communication unit includes at least one communication module, which includes Wi-Fi, Bluetooth, and Zigbee, and the communication module is capable of supporting data transmission between the range hood and the terminal device.

7. The intelligent digital control system for a range hood based on artificial intelligence according to claim 6, characterized in that: The average smoke concentration in the current time period and the average smoke concentration in historical time periods are analyzed to obtain the peak smoke concentration. Based on the peak smoke concentration and the health tolerance threshold, the user's dietary habits are judged and the user's dietary habits are divided into healthy steaming and boiling type, normal cooking type and heavy oil stir-fry type. Life suggestions are given for different dietary habits through the application.

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