Range hood intelligent digital control system based on artificial intelligence

Abstract

The invention discloses a range hood intelligent digital control system based on artificial intelligence, and relates to the technical field of intelligent control, and the range hood intelligent digital control system comprises a monitoring module, an intelligent control module, a data storage module, a visualization module and a user terminal module, the intelligent control module comprises a range hood on-off control unit, a smoke extraction power adjusting unit, a range hood efficiency evaluation unit and a power correction unit, the smoke concentration is monitored in real time, a threshold value is set, intelligent on-off is achieved, the smoke extraction power adjusting unit dynamically adjusts the power according to the smoke concentration change, the smoke extraction effect is ensured, and energy consumption is reduced; and the range hood efficiency evaluation unit evaluates the purification effect through the working deviation rate, automatically adjusts the power and reminds a user of overhauling, so that dependence on subjective judgment or regular cleaning is avoided, the intelligent level and the working quality of the range hood are improved, and the user experience effect is enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of intelligent control, and particularly to an intelligent digital control system for a range hood based on artificial intelligence. Background Technique

[0002] When cooking, stir-frying and other operations are carried out in the kitchen, a large amount of oil fume will be generated. These oil fumes will cause certain damage to human health and pollute the indoor environment. Therefore, in people's daily life, range hoods are generally used to purify the kitchen air and improve the indoor air quality. The control system of the range hood is used to control the operation and parameter adjustment of the range hood.

[0003] However, in the current control system of kitchen range hoods, only different gears are divided according to preset thresholds to control the rotation speed of the range hood, and it is difficult to perform intelligent adjustment according to the real-time changes of the environment and oil fume concentration, resulting in the failure to remove oil fume in time or energy consumption waste. Although there is a control system and method for a kitchen range hood disclosed in Chinese Patent CN202310660641.9, the control means of this range hood extracts the multi-scale correlation feature distribution representation of the temperature value and the range hood rotation speed value in the time dimension, and uses this to perform decoding regression to obtain the range hood rotation speed value, so as to perform real-time control on the range hood, improve the control accuracy of the range hood, and better improve the oil fume emission effect.

[0004] However, as the use time of the range hood increases, pollutants on the inner wall of the pipeline and devices such as filters gradually accumulate, restricting air circulation and reducing the working efficiency of the range hood. Currently, it is usually cleaned according to the user's subjective feeling or regularly, lacking intelligent evaluation of the purification efficiency of the range hood, which affects the user experience. Summary of the Invention

[0005] The purpose of the present invention is to provide an intelligent digital control system for a range hood based on artificial intelligence, which solves the problems mentioned in the above background technique.

[0006] To achieve the above purpose, the present invention provides the following technical solution: 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;

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

[0008] The intelligent control module includes a range hood opening and closing control unit, a smoking power adjustment unit, a range hood efficiency evaluation unit and a power correction unit;

[0009] The on-off control unit of the range hood is used to analyze the environmental information to obtain the average smoke concentration, set the start threshold and the stop threshold for the range hood, compare the average smoke concentration with the start threshold and the stop threshold, and control the on-off of the range hood according to the comparison result;

[0010] The smoking power adjustment unit is used to, after the range hood is started, compare and analyze the average smoke concentrations in different time periods to 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 efficiency evaluation unit of the range hood is used to, after the range hood is started, analyze the environmental information before and after purification by the range hood to obtain the actual purification effect of the range hood;

[0012] The power correction unit knows the ideal purification effect of the range hood according to the design parameters of the range hood, combines and analyzes the actual purification effect and the ideal purification effect, and further adjusts the output power of the range hood.

[0013] Optionally, the on-off control unit of the range hood obtains the smoke concentrations at each time point in the current time period and the historical time period in the environmental information, adds up the smoke concentrations 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 the start threshold and the stop threshold for the range hood;

[0015] The range hood is turned on when the average smoke concentration in the current time period is greater than the start threshold;

[0016] The range hood is turned off when the average smoke concentration in the current time period is less than the stop threshold;

[0017] By analyzing the smoke concentrations at different time points through the on-off control unit of the range hood to obtain the average smoke concentration, and then judging the on-off of the range hood according to the average smoke concentration, there is no need to manually operate the range hood repeatedly, which improves the intelligence level of the range hood.

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

[0019] By performing intelligent adjustment according to the real-time changes of the environment and the oil fume concentration, while ensuring the oil fume purification effect, it reduces energy consumption and lowers the usage cost.

[0020] Optionally, the range hood efficiency evaluation unit obtains the actual working efficiency of the range hood by comparing and analyzing the data before and after purification of the range hood, obtains the running time of the range hood through the running data of the range hood, and combines the actual working efficiency of the range hood with the running time of the range hood to obtain the sewage discharge data;

[0021] The actual working efficiency of the range hood and the sewage discharge data can help users understand the actual working quality of the range hood and its environmental contribution.

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

[0023] Judging whether to clean based on the working deviation rate, without cleaning the range hood according to the subjective feeling of the user or regularly, ensures the working quality of the range hood and improves the intelligent level of the range hood.

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

[0025] Optionally, the user terminal module includes a wireless communication unit and an application program. The user downloads the application program through the terminal device and communicates with the range hood through the wireless communication unit, can remotely view the working status of the range hood, and remotely control the range hood through the application program.

[0026] Optionally, the wireless communication unit includes at least one communication module, and the communication module includes Wi-Fi, Bluetooth, and Zigbee. The communication module can support data transmission between the range hood and the terminal device.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0028] First, the present invention realizes the effect of intelligent opening and closing by real-time monitoring of the smoke concentration and setting relevant thresholds to control the opening and closing of the range hood, without manually opening and closing the range hood repeatedly. By calculating the average value of the smoke concentration, it can avoid frequent mis-opening and closing and missed opening and closing of the range hood, making the control of the range hood more accurate and stable. Then, the smoking power adjustment unit adjusts the power of the range hood in real time according to the change of the smoke concentration, so that the range hood can maintain a low power output at a low smoke concentration and increase the power when the smoke concentration rises, realizing the dynamic adjustment of the output power of the range hood, ensuring the smoking quality while avoiding energy consumption waste. At the same time, without manual adjustment by the user, the range hood is more intelligent and improves the comfort of user use.

[0029] Second, the present invention analyzes the working deviation rate by comparing the actual purification effect and the designed purification effect of the range hood through the range hood efficiency evaluation unit, sets a threshold for the working deviation rate, and further adjusts the power of the range hood, so as to evaluate the working quality of the current range hood, ensure the purification effect of the range hood, remind the user when the working deviation rate is too large, and enable timely maintenance without relying on the user's subjective feeling or regular cleaning of the range hood, improving the intelligent level of the range hood while ensuring its working quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0031] Figure 2 is a schematic diagram of the intelligent control module of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0032] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the scope of protection of the present invention.

[0033] Embodiment 1, please refer to Figure 1 and Figure 2 , this embodiment 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 operation data through sensor devices;

[0035] The intelligent control module includes a range hood opening and closing control unit, a smoking power adjustment unit, a range hood efficiency evaluation unit, and a power correction unit;

[0036] The range hood opening and closing control unit analyzes the environmental information to obtain the average smoke concentration, sets a start threshold and a stop threshold for the range hood, compares the average smoke concentration with the start threshold and the stop threshold, and controls the opening and closing of the range hood according to the comparison result;

[0037] The smoking power adjustment unit compares and analyzes the average smoke concentration at different time periods after the range hood is started to obtain the average smoke concentration change rate, and dynamically adjusts the output power of the range hood according to the average smoke concentration change rate;

[0038] The range hood efficiency evaluation unit is used to analyze the environmental information before and after the purification of the range hood after the range hood is started, so as to obtain the actual purification effect of the range hood;

[0039] The power correction unit knows the ideal purification effect of the range hood according to the design parameters of the range hood, combines and analyzes the actual purification effect and the ideal purification effect, and further adjusts the output power of the range hood.

[0040] In this embodiment, the monitoring module is used to monitor the environmental information and the operation data of the range hood in real time. The environmental information includes data such as smoke concentration and air humidity, and it cooperates with the intelligent control module. The average smoke concentration is obtained by analyzing the smoke concentration at different time points through the range hood opening and closing control unit, and then whether to start or close the range hood is judged according to the average smoke concentration, so as to realize the automatic opening and closing of the range hood, without manual repeated operation of the range hood, and improve the intelligence level of the range hood.

[0041] During the operation of the range hood, the average smoke concentration change rate is obtained by comparing and analyzing the average smoke concentration in different time periods through the smoking power adjustment unit in the intelligent control module. The output power of the range hood is dynamically adjusted according to the average smoke concentration change rate. When the smoke concentration is high, the output power of the range hood is increased, and vice versa, so as to realize intelligent adjustment according to the real-time changes of the environment and oil fume concentration, ensure the oil fume purification effect while reducing energy consumption and lowering the use cost.

[0042] Then, the range hood efficiency evaluation unit analyzes the environmental information before and after the purification of the range hood to obtain the actual purification effect of the range hood. The working deviation rate is obtained by comparing the actual purification effect of the range hood with the designed purification effect, so as to evaluate the working quality of the current range hood. When the working deviation rate is too large, it reminds the user, and the user can repair it in time, without cleaning the range hood according to the subjective feeling of the user or regularly, which improves the intelligence level of the range hood. After obtaining the actual purification effect of the range hood, combined with the daily operation time of the range hood, the amount of pollutants reduced every day can be obtained, enabling the user to directly understand the emission reduction effect of the range hood.

[0043] Then, the output power of the range hood is adjusted according to the working deviation rate. When the working deviation rate exceeds the set threshold, the further adjustment of the output power of the range hood will be started, ensuring the purification effect of the range hood, while avoiding the system instability phenomenon caused by frequent fluctuations of the range hood power, improving the user experience, and judging whether the range hood needs to be cleaned through the set threshold, without cleaning the range hood according to the subjective feeling of the user or regularly, ensuring the working quality of the range hood and improving the intelligence level of the range hood.

[0044] Further, the on-off control unit of the range hood obtains the smoke concentration at each time point within the current time period and the historical time period in the environmental information, adds up the smoke concentrations 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;

[0045] According to the current kitchen exhaust system design specifications and air quality standards, set the start threshold Y1 and the stop threshold Y2 of the range hood;

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

[0047]

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

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

[0050] n is 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, and the time point i represents a specific point within the time range, such as the first second, the second second, etc. Thus, by recording the smoke concentration D i at each time point i, summing them up and dividing by the number of time points n, the average smoke concentration D(T) in the current time period T can be obtained avg ,

[0052] The calculation process of the average smoke concentration in the historical time period is as follows:

[0053]

[0054] Where D(T−1) avg is the average smoke concentration in the historical time period T−1;

[0055] D j is the smoke concentration at time point j;

[0056] m is the number of time points in the historical time period T−1;

[0057] Specifically, when the average smoke concentration D(T) avg in the current time period T is greater than the start threshold Y1, the range hood is turned on. At this time, the output power of the range hood is the preset initial output power, and the initial output power is the minimum power in the operating state of the range hood.

[0058] When the average smoke concentration D(T) avg in the current time period T is less than the stop threshold Y2, the range hood is turned off.

[0059] By monitoring the smoke concentration in real time and setting relevant thresholds to control the opening and closing of the range hood, the effect of intelligent opening and closing is achieved. There is no need to manually open and close the range hood repeatedly, saving time and enabling users to focus on cooking. It ensures that the oil fume can be removed in a timely manner, and by calculating the average value of the smoke concentration, it can avoid frequent false opening and closing and missed opening and closing of the range hood, making the control of the range hood more accurate and stable.

[0060] Furthermore, the smoking power adjustment unit subtracts the average smoke concentration in the historical time period from the average smoke concentration in the current time period to obtain the average concentration difference, then divides the average concentration difference by the average smoke concentration in the historical time period to obtain the smoke change rate. The historical output power is obtained from the operation data of the range hood, and the humidity data is obtained from the environmental information. The smoke change rate, historical output power, and humidity data are combined to obtain the adjusted output power. The system adjusts the range hood according to the adjusted output power, and the adjustment process is as follows:

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

[0062] Where P adj is the adjusted output power;

[0063] P(T-1) is the output power in time period T-1;

[0064] R smoke is the smoke change rate, representing the difference in the average smoke concentration in different time periods;

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

[0066] Multiplying the sum of the smoke change rate R smoke plus one and the output power P(T-1) in time period T-1 can represent the output power that the range hood should reach under the current smoke concentration, and then multiplying by the smoke change rate influence coefficient β to represent the adjustment strength of the range hood power.

[0067] WH is the humidity influence coefficient, representing the influence of the environmental humidity on the working efficiency of the range hood;

[0068] The smoke change rate R smoke is obtained as follows:

[0069]

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

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

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

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

[0074]

[0075] H is the relative humidity;

[0076] H opt is the optimal working humidity of the range hood. It is obtained according to the design parameters of the range hood, indicating that in this humidity environment, the purification rate of the range hood can reach the maximum value and the working effect of the range hood is the best. When deviating from the optimal working humidity, the working effect of the range hood will decline;

[0077] Subtract the optimal working humidity H of the range hood from the relative humidity H opt The humidity difference can be obtained and squared to ensure that the result is positive, and it can indicate that when the humidity is close to the optimal value, the humidity influence gradually slows down, making the influence of humidity on the power of the range hood tend to be smooth.

[0078] k is a constant that controls the influence of humidity on the output power, and its value range is from 0 to 1, indicating the change intensity of the working efficiency of the range hood when the humidity deviates from the optimal working humidity H of the range hood opt of the range hood;

[0079] When the relative humidity H is closer to the optimal working humidity H of the range hood opt , the influence of humidity on the power is smaller. Because when the humidity is too low, the smoke particles are light and diffuse quickly, and the smoking efficiency is high, and the power demand of the range hood can be reduced accordingly;

[0080] On the contrary, when the relative humidity H deviates more from the optimal working humidity H opt of the range hood, the humidity influence degree increases. The higher the humidity, the greater the power demand of the range hood, because humidity will increase the viscosity of the air and make the smoke particles heavier, affecting the adsorption efficiency of the range hood.

[0081] Specifically, adjusting the power of the range hood in real time according to the change of smoke concentration can make the range hood maintain a low power output at a low smoke concentration, increase the power in a timely manner when the smoke concentration rises, ensure the comfort of the environment, achieve dynamic adjustment of the output power of the range hood, ensure the smoking quality while avoiding energy consumption waste, and at the same time, without manual adjustment by the user, make the range hood more intelligent and improve the comfort of user use.

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

[0083] Furthermore, the range hood efficiency evaluation unit obtains the actual working efficiency of the range hood by comparing and analyzing the data before and after purification of the range hood, obtains the running time of the range hood through the running data of the range hood, and combines the actual working efficiency of the range hood with the running time of the range hood to obtain the pollution discharge data.

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

[0085]

[0086] Where E act is the actual purification rate of the range hood;

[0087] DL in is the oil fume volume at the air inlet of the range hood;

[0088] DL out is the oil fume volume at the air outlet of the range hood;

[0089] Specifically, the oil fume volume is obtained by multiplying the smoke concentration by the air flow. By obtaining the actual purification rate E act of the range hood, the current working quality of the range hood can be evaluated. The closer the actual purification rate E act of the range hood is to 1, the better the purification effect of the range hood, and vice versa.

[0090] Through the actual purification rate E act of the range hood, the daily emission reduction amount of the range hood can be analyzed. The analysis process is as follows:

[0091] L x = Q air × T work × E act × B x

[0092] Where L x is the emission reduction amount of pollutant x;

[0093] Q airThe emission of the range hood, in m 3 / min;

[0094] T work is the working duration of the range hood;

[0095] The emission Q air of the range hood and the working duration T work of the range hood are multiplied to obtain the total emission of the range hood. The working duration T work of the range hood takes the working duration of the range hood in one day, and the total emission of the range hood is multiplied by the actual purification rate E act of the range hood to obtain the total emission reduction;

[0096] B x is the proportion of pollutant x in the smoke;

[0097] Since the smoke contains multiple pollutants and the proportion of each pollutant is different, by multiplying the total emission reduction by the proportion of each pollutant, the emission reduction of each pollutant can be finally obtained;

[0098] The types of pollutants include VOC, NMHC, CO2, etc.

[0099] When x is set to 1, the pollutant is carbon dioxide. By calculating the proportion B1 of carbon dioxide in the smoke, the carbon dioxide emission reduction L1 can be obtained. According to the reference carbon credit mechanism, points are given to users. For example, 1 kg of carbon dioxide emission reduction L1 = 10 points. And an integral mall is set in the above application program. Users can exchange the points for goods in the integral mall, so as to motivate users to use the range hood. In actual applications, dynamic rewards can be set. For example, when users continuously use the range hood for emission reduction for more than seven days, the points exchanged for 1 kg of carbon dioxide emission reduction L1 increase by 15%, further motivating users to use the range hood for long-term emission reduction.

[0100] Specifically, after obtaining the actual purification rate E act of the range hood, the emissions of each pollutant can be analyzed, enabling users to intuitively understand the working effect of the range hood.

[0101] Furthermore, the power correction unit obtains the designed working efficiency of the range hood through the design parameters of the range hood, and obtains the actual working efficiency of the range hood through the operating data of the range hood. The actual working efficiency of the range hood is compared with the designed working efficiency of the range hood to obtain the working deviation rate. When the working deviation rate is too large, the influence coefficient β of the smoke change rate in the smoke extraction power adjustment unit is corrected. The specific process is as follows:

[0102]

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

[0104] The working deviation rate represents the difference between the actual purification effect of the range hood and the purification effect at the time of factory production;

[0105] E act is the actual purification rate of the range hood;

[0106] E ide is the designed purification rate of the range hood, which is obtained based on the design parameters of the range hood, and may vary for each brand of range hood;

[0107] When the working deviation rate is less than 1, it indicates that the actual smoke extraction effect of the range hood is lower than the designed value. Continuing to operate the range hood is likely to cause the smoke concentration to continuously increase, affecting the user experience. At this time, the power of the range hood should be increased.

[0108] Since the adjustment process of the system itself will generate some energy losses, such as frequently adjusting components such as the fan speed and heating power of the range hood, it will cause waste of energy. In actual operation, in order to ensure the working efficiency of the range hood while avoiding frequent adjustment of the output power of the range hood, when it is only corrected through the power correction unit, which can avoid overreaction to minor changes, avoid problems such as energy loss and potential overheating caused by the system frequently adjusting the power of the range hood, improve the stability of the system, and keep the range hood operating efficiently and stably;

[0109] When it indicates that the gap between the actual smoke extraction effect of the range hood and the designed smoke extraction effect is too large, indicating that there is a problem inside the range hood. It may be due to long-term dust accumulation, filter clogging, or failure of other important components, etc. At this time, the smoke extraction effect of the device has significantly decreased and it cannot effectively clean the oil fume. While correcting the power of the range hood, the user is notified to repair the range hood.

[0110] When the working deviation rate is less than 1, is greater than 1, and when the new smoke change rate influence coefficient Nβ will be greater than the smoke change rate influence coefficient β, at this time, the new smoke change rate influence coefficient Nβ is brought into the smoking power adjustment unit, and the adjusted output power P adj increases;

[0111] When the working deviation rate is greater than 1, is less than 1, and when the new smoke change rate influence coefficient Nβ will be less than the smoke change rate influence coefficient β, at this time, the new smoke change rate influence coefficient Nβ is brought into the smoking power adjustment unit, and the adjusted output power P adj decreases. Generally speaking, as the range hood is used for a longer time, the actual purification rate E act will decrease.

[0112] Specifically, by calculating the working deviation rate to further correct the output power of the range hood, the actual working conditions of the range hood can be taken into account, avoiding the problem that the smoking effect decreases due to the long-term use of the range hood and the system cannot reflect it in time. And when the actual smoking effect of the range hood is too poor, it can timely remind the user to clean or replace parts, ensuring the smoking effect of the range hood and improving the comfort of user use.

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

[0114] Specifically, analyze the operation data of the range hood, generate a smoke concentration change trend chart, a humidity fluctuation chart, etc. through the smoke concentration and humidity data, helping the user to understand the dynamic changes of the working environment of the range hood. Compared with numbers, the form of charts enables the user to more clearly and quickly understand the specific situation of the range hood.

[0115] Furthermore, the user terminal module includes a wireless communication unit and an application program. The user downloads the application program through the terminal device and communicates with the range hood through the wireless communication unit, enabling remote viewing of the working status of the range hood and remotely controlling the range hood through the application program. The user 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 opening and closing frequency of the range hood, estimate the number of times the user cooks in a day. For example, each time the range hood is turned on and lasts for a period of time, it can be considered as one cooking behavior.

[0117] Estimate the duration of each cooking based on the start and stop duration of the range hood.

[0118] Combined with the analysis of the internal intake and component data of the range hood, judge the user's eating habits. By analyzing the user's eating habits, the system will combine the Internet to provide healthy diet suggestions and give suggestions on how to reduce oil fume emissions, making the use experience of the range hood more intelligent and personalized.

[0119] Furthermore, analyze the average smoke concentration in the current time period and the average smoke concentration in the historical time period to obtain the peak smoke concentration. Combine the peak smoke concentration and judge the user's eating habits according to the health tolerance threshold. Divide the user's eating habits into healthy steaming type, normal cooking type and heavy oil stir-frying type, and send life suggestions for different eating habits to the user terminal device through the application program.

[0120] When the peak smoke concentration is greater than 500 μg / m 3and the number of occurrences within one month is greater than half of the total number of cooking times, the user is determined to be a heavy-oil stir-frying type.

[0121] For heavy-oil stir-frying type users, life suggestions can be recommended to users through the application to ensure the user's physical health. For example, the cold pan and cold oil method, with the oil temperature reduced by 50 - 80 °C, can effectively reduce PM2.5 emissions. Refined soybean oil has a smoke point ≥ 230 °C, which can reduce the amount of oil fume generated by 40% compared to virgin olive oil with a smoke point of 160 °C.

[0122] When the peak value of the smoke concentration is between 200 - 500 μg / m 3 and the number of occurrences within one month is greater than half of the total number of cooking times, the user is determined to be a normal cooking type.

[0123] For normal cooking type users, they should be encouraged to transform into a healthy steaming type. Dishes of steaming and stewing types can be recommended to users through the application, which helps reduce oil fume emissions and can also improve the nutritional value of the diet.

[0124] When the peak value of the smoke concentration is less than 200 μg / m 3 and the number of occurrences within one month is greater than half of the total number of cooking times, the user is determined to be a healthy steaming type.

[0125] For healthy steaming type users, they should be encouraged to maintain a healthy diet state, and more low-oil and low-fat recipes should be provided to further optimize the diet structure and maintain the diversity of the diet.

[0126] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The intelligent digital control system for range hoods based on artificial intelligence is characterized by: It includes monitoring module, intelligent control module, data storage module, visualization module and user terminal module; The monitoring module detects environmental information and range hood operation data through sensor equipment; The intelligent control module includes a range hood on / off control unit, a smoke extraction power adjustment unit, a range hood efficiency evaluation unit, and a power correction unit; The range hood on / off control unit is used to analyze environmental information to obtain an average smoke concentration, set a start threshold and a shutoff threshold for the range hood, compare the average smoke concentration with the start threshold and the shutoff threshold, and control the start / shutoff of the range hood based on the comparison result; The smoke extraction power adjustment unit is used to compare and analyze the average smoke concentrations in different time periods after the range hood is started, obtain the average smoke concentration change rate, and dynamically adjust the range hood output power according to the average smoke concentration change rate; The range hood efficiency evaluation unit is used to analyze the environmental information before and after the range hood is started to obtain the actual purification effect of the range hood; The power correction unit learns the ideal purification effect of the range hood according to the range hood design parameters, combines and analyzes the actual purification effect with the ideal purification effect, and further adjusts the output power of the range hood.

2. The intelligent digital control system for range hoods based on artificial intelligence according to claim 1 is characterized in that: The range hood on / off 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 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 the start threshold and shut down threshold for the range hood; The range hood turns on when the average smoke concentration in the current time period is greater than the start threshold; The range hood is turned off when the average smoke concentration in the current time period is lower than the shutdown threshold.

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

4. The intelligent digital control system for range hoods based on artificial intelligence according to claim 3 is characterized in that: The range hood efficiency evaluation unit obtains the actual working efficiency of the range hood by comparing and analyzing the data before and after the range hood purification, obtains the range hood operation time through the range hood operation data, and combines the actual working efficiency of the range hood with the range hood operation time to obtain the sewage discharge data.

5. The intelligent digital control system for range hoods based on artificial intelligence according to claim 4 is characterized in that: The power correction unit obtains the design working 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, and sets a corresponding threshold for the working deviation rate to determine whether to correct the power of the range hood and clean the range hood.

6. The intelligent digital control system for range hoods based on artificial intelligence according to claim 5 is 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 the user can intuitively understand the working status of the range hood.

7. The intelligent digital control system for range hoods based on artificial intelligence according to claim 6 is characterized in that: 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. The user can remotely view the working status of the range hood and remotely control the range hood through the application.

8. The intelligent digital control system for range hoods based on artificial intelligence according to claim 1 is characterized in that: The wireless communication unit includes at least one communication module, and the communication module includes Wi-Fi, Bluetooth and Zigbee. The communication module can support data transmission between the range hood and the terminal device.

9. The intelligent digital control system for range hoods based on artificial intelligence according to claim 7, characterized in that: The proportion of each pollutant in the above-mentioned pollution emission data is analyzed to obtain the user's carbon emission reduction. Points are awarded to users based on the user's carbon emission reduction and with reference to the carbon credit mechanism. A points mall is set up in the above-mentioned application, and users can redeem points for products in the points mall.

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

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