Control method and system for user-defined design of range hood

Abstract

The invention discloses a control method and system for user-defined design of a range hood, and the method comprises the steps: building a database including conventional parameters, calling the data of the database through a control system, obtaining regulation and control parameters, and carrying out the regulation and control of the range hood; the method specifically comprises the following steps: a user personalized input step: inputting scene data and noise requirements by a user through a control panel, wherein the noise requirements comprise mute priority and air volume priority; the control system calculates corresponding output data of the range hood according to the input scene data and noise requirements, and the output data of the range hood comprises minimum air volume data, static pressure data and noise data; a regulation and control parameter obtaining step: according to the obtained output data of the range hood, a control system calls a database to obtain corresponding regulation and control parameters; the control system sends a corresponding instruction to the range hood according to the regulation and control parameters, and the operation process of the range hood is regulated and controlled according to the instruction corresponding to the regulation and control parameters.

Description

Technical Field

[0001] The present invention belongs to the technical field of range hood control, and in particular relates to a control method and system for a user-defined range hood. Background Art

[0002] Range hoods are designed and developed based on aerodynamic principles. Their operating principle can be summarized as negative pressure, suction, separation, and exhaust. Specifically, the fan drives the impeller to generate negative pressure, allowing the smoke to pass through the filter, separating the oil and smoke. The oil adheres to the filter and flows back into the oil cup, while the smoke is discharged outdoors or into a public flue through the impeller and exhaust pipe. With the development of the Internet of Things and smart home technologies, users are increasingly turning to smart devices to automate and intelligentize their home lives. As a key appliance in the kitchen, intelligent control of the range hood has become a key factor in improving the quality of home life. Different users have different requirements for range hoods, such as floor height, kitchen area, and air volume. Therefore, range hood design needs to be more personalized and diversified to meet the needs of different users.

[0003] High-efficiency energy-saving technology is also a key trend in range hood development. By improving fan performance and optimizing air duct design, energy consumption and noise levels can be reduced. Optimizing intelligent algorithms is key to improving the performance of range hood automation. By continuously optimizing algorithms, range hood fume treatment efficiency can be improved, energy consumption and noise can be reduced, and the user experience can be enhanced.

[0004] Most existing automatic range hood control methods are based on the range hood's structure and performance characteristics to determine relevant parameters. However, most manufacturers (for products with the same specifications) use the same parameters, without addressing individual household needs. However, when it comes to actual living environments, due to significant variations in floor height, number of floors, kitchen area, and family size, universal range hood design parameters may not be fully suitable. Due to individual housing circumstances, for example, the length of the common flue to the rooftop outlet varies depending on the floor height, resulting in varying exhaust pressure requirements for the range hood. The lower the floor, the greater the required pressure. The size of each kitchen varies, resulting in varying ventilation volume requirements for the range hood. Furthermore, each household has varying noise tolerance during cooking, with some prioritizing cooking over noise, resulting in varying airflow requirements for the range hood. Therefore, technologies such as control methods that automatically calculate and control range hoods to meet user needs remain under development. Summary of the Invention

[0005] In response to the problems existing in the prior art, the present invention provides a control method and system for user-customized design of range hoods. The user selects corresponding housing parameters and noise requirements according to the actual situation of the house. The control system automatically calculates and generates corresponding range hood data and control parameters according to the database, user parameters and requirements, and controls the range hood to meet the customized needs of different users for range hoods, so that the range hood is better suitable for actual scenarios and the user experience is enhanced.

[0006] The technical solution of the present invention is achieved as follows:

[0007] A control method for a user-defined range hood is provided. The control system retrieves database data, establishes a database including conventional parameters, obtains control parameters, and controls the range hood. The method specifically includes the following steps:

[0008] D1. User personalized input step: The user inputs scene data and noise requirements through the control panel, wherein the noise requirements include quietness priority and air volume priority;

[0009] D2. Calculating output data step: The control system calculates corresponding range hood output data based on the input scene data and noise requirements. The range hood output data includes minimum air volume data, static pressure data, and noise data.

[0010] D3. Obtaining control parameters: Based on the obtained range hood output data, the control system accesses the database to obtain the corresponding control parameters;

[0011] D4. Steps for regulating the operation of the range hood: The control system sends corresponding instructions to the range hood according to the regulation parameters, and regulates the operation process of the range hood according to the instructions corresponding to the regulation parameters.

[0012] Furthermore, the range hood includes an air duct system, a control panel, an air inlet, and an air outlet; the control panel has a built-in control system; the air duct system is provided with a fan, a volute, an impeller, and a guide ring; the air inlet is provided with an air inlet baffle, and the air outlet is provided with an air outlet baffle; the air flow control area corresponding to the air inlet is changed by rotating the air inlet baffle; and the air outlet resistance of the range hood outlet is changed by rotating the air outlet baffle;

[0013] The control parameters include the fan speed, the opening and closing angles of the air inlet baffle and the air outlet baffle.

[0014] Furthermore, the air inlet baffle and the air outlet baffle are respectively composed of one or more baffles, or the air inlet baffle and the air outlet baffle are in a shutter structure.

[0015] Furthermore, the air outlet baffle includes a first air outlet baffle or a second air outlet baffle, and the corresponding rotation control opening and closing angle range is 0°-90°; the air inlet baffle includes an upper air inlet baffle and a lower air inlet baffle, and the upper air inlet baffle is rotated, and the corresponding control opening and closing angle range is 0°-90°, and the lower air inlet baffle is rotated, and the corresponding control opening and closing angle range is 0°-30°;

[0016] The control system changes the air volume and noise by regulating the fan speed and the opening and closing angles of the air inlet baffle and the air outlet baffle.

[0017] Furthermore, the scene data includes kitchen area, floor height (specifically the height of the current floor), number of family members, total number of floors, and floor number;

[0018] The calculation method of the minimum air volume data includes:

[0019] D2.11. Based on the kitchen area and floor height, retrieve the corresponding ventilation parameters from the database to obtain the required air volume Q1, i.e., Q1 = S × H × C1. Where S represents the kitchen area, H represents the floor height, and C1 is the ventilation parameter, i.e., the number of air changes per hour.

[0020] D2.12. Based on the number of family members, retrieve the corresponding per capita air volume parameter from the database to obtain the required air volume Q2, i.e., Q2 = N × C2; where N is the number of family members and C2 is the per capita air volume parameter, i.e., the air volume required per person per hour;

[0021] D2.13. Based on the required air volumes Q1 and Q2, compare the values ​​of Q1 and Q2 and take the larger value of Q1 and Q2 as the minimum operating air volume Q of the range hood. w .

[0022] Specifically, D2.11 calculates the required air volume based on the kitchen area and the internal housing height, and the ventilation parameters are obtained by retrieving data from the database; D2.12 calculates the required air volume based on the number of family members, and the per capita air volume parameters are also obtained by retrieving data from the database; the larger value of the two calculation results is taken as the minimum air volume value that meets the requirements of the range hood.

[0023] Specifically, the ventilation parameters, per capita air volume parameters, etc. refer to the standards of GB / T18883-2002 "Indoor Air Quality Standard" and GB50736-2012 "Design Code for Heating, Ventilation and Air Conditioning of Civil Buildings".

[0024] Furthermore, the calculation method of static pressure data includes:

[0025] D2.21. Based on the total number of floors and the floor number, retrieve the corresponding resistance coefficient from the database. Different floor heights correspond to different resistance coefficients.

[0026] The total number of floors is F, the floor number is f; F1, F2, F3 are floor constants, and F1<F2<F3;

[0027] If 1≤F≤F1 or F>F3, the corresponding resistance coefficient is K1;

[0028] If F1<F≤F3, and F1<f≤F2, the corresponding resistance coefficient is K2;

[0029] If F1<F≤F3, and F2<f≤F3, the corresponding resistance coefficient is K3;

[0030] D2.22. Obtain the static pressure value corresponding to the range hood based on the required working air volume of the range hood, that is:

[0031] R=K*Q w 2 ;

[0032] Where R is the static pressure value corresponding to the range hood, K is determined according to the total number of floors and the resistance coefficient corresponding to the floor number, and the value is K1, K2 or K3, Q w is the minimum working air volume during the operation of the range hood; the obtained static pressure value R is the corresponding static pressure data.

[0033] Specifically, since different floor heights correspond to different resistance coefficients, a method of classifying and selecting resistance coefficients is adopted for floors with different total number of floors. A method of classifying and selecting resistance coefficients is also adopted for residents on different floors to obtain accurate static pressure values. The corresponding resistance coefficient is selected according to the total number of floors and the corresponding floors, and the static pressure value is calculated.

[0034] Specifically, the selection of the resistance coefficient can refer to the national standard, GB-T 17713-2022 "Ranger hoods and other cooking fume suction and exhaust devices".

[0035] Specifically, the working air volume Q of the range hood during operation w It can be obtained by calling the database or based on actual scenario requirements.

[0036] Furthermore, the calculation method of noise data includes:

[0037] D2.31. Obtain a total noise value through a noise calculation module. The total noise value includes air volume noise value, transmission noise value, and fan noise value.

[0038] The calculation method of the air volume noise value is to retrieve the corresponding air flow control area S1 in the database according to the opening and closing angle of the air inlet baffle, and the wind speed of the air flow at the range hood inlet is V=Q w / S1, where Q wIt is the minimum working air volume of the range hood during operation;

[0039] According to the obtained wind speed value, the air volume noise value is calculated, that is, LA1 = (16 ~ 20) + 60lgV, where V is the wind speed of the air flow at the range hood inlet and LA1 is the air volume noise value;

[0040] D2.32. Retrieve the transmission noise data from the database and obtain the transmission noise value LA2;

[0041] D2.33. Calculate and obtain the fan noise value LA3;

[0042] D2.34. Calculate the total noise value, that is:

[0043] LA=10*lg(10 LA1 / 10 +10 LA2 / 10 +10 LA3 / 10 );

[0044] Where LA represents the total noise value.

[0045] Specifically, there are three main factors that affect noise, namely airflow regeneration noise, mechanical vibration noise, and fan noise. Airflow regeneration noise specifically corresponds to the air volume noise value, mechanical vibration noise specifically corresponds to the transmission noise value, and fan noise specifically corresponds to the fan noise value.

[0046] The transmission noise value corresponding to the mechanical vibration noise is directly retrieved from the database. In the process of building the database, the noise data generated by the mechanical vibration or transmission is included.

[0047] The air volume noise value corresponding to the airflow regeneration noise is adjusted by changing the opening and closing angles of the air inlet and the air outlet. Due to the change in the opening and closing angles, the control area corresponding to the air inlet and the air outlet changes, which in turn affects the noise level. In the process of calculating and adjusting the noise value, it must always be ensured that the required air volume cannot be lower than the minimum air volume required by the range hood.

[0048] In D2.33, the specific method for obtaining the fan noise value LA3 is:

[0049]

[0050] Among them, q v Indicates the fan volume flow rate (equivalent to the real-time air volume Q when the range hood is working), P tF Indicates the total pressure value (equal to the dynamic pressure value + static pressure value, where the dynamic pressure value is 1 / 2ρV 2 , ρ is the fluid density, V is the flow velocity (such as wind speed); the fan noise value corresponding to LA3 can also form a database, and the value of LA3 can be obtained by calling the database.

[0051] Furthermore, a maximum noise threshold and a silence priority threshold are set, wherein the silence priority threshold is smaller than the maximum noise threshold; and the total noise value is lower than the maximum noise threshold;

[0052] If the noise requirement is selected as quiet priority, the total noise value shall not be greater than the quiet priority threshold;

[0053] If the noise requirement is selected as air volume priority, the total noise value shall not be greater than the maximum noise threshold.

[0054] Furthermore, if the noise requirement is silent priority and the total noise value is greater than the silent priority threshold, the size of LA1 and LA3 is determined;

[0055] If LA1>LA3: change the opening and closing angle of the air inlet baffle, increase the air flow control area S1 corresponding to the air inlet, and reduce the air volume noise value LA1;

[0056] The airflow control area S1 has a maximum control area and a minimum control area. S1 is located between the maximum control area and the minimum control area, and the corresponding LA1 has a corresponding minimum value.

[0057] If the total noise value is still greater than the quiet priority threshold when LA1 is reduced to the minimum value, the fan speed is reduced to reduce the fan noise value LA3;

[0058] If the air volume value corresponding to the reduced fan speed is not less than the minimum air volume of the range hood, the fan speed has the corresponding minimum speed, and the corresponding LA3 has the corresponding minimum value;

[0059] If the total noise level is still greater than the mute priority threshold when LA3 is reduced to the minimum value, the air outlet baffle opening and closing angle will be changed until the total noise level is no greater than the mute priority threshold or the air outlet baffle opening and closing angle reaches the maximum;

[0060] At this time, the total noise value meets the noise requirement when quiet priority is given, and then the current air volume Q3 corresponding to quiet priority is obtained according to the current state of the range hood;

[0061] The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the control parameters with silent priority.

[0062] If LA1 < LA3: reduce the fan speed and reduce the fan noise value LA3;

[0063] If the total noise value is still greater than the quiet priority threshold when LA3 is reduced to the minimum value, the opening and closing angle of the air inlet baffle is changed to increase the air flow control area S1 corresponding to the air inlet and reduce the air volume noise value LA1;

[0064] If the total noise level is still greater than the mute priority threshold when LA1 is reduced to the minimum value, the opening and closing angle of the air baffle will be changed until the total noise level is no greater than the mute priority threshold or the opening and closing angle of the air baffle reaches the maximum;

[0065] At this time, the total noise value meets the noise requirement when quiet priority is given, and then the current air volume Q3 corresponding to quiet priority is obtained according to the current state of the range hood;

[0066] The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the control parameters with silent priority.

[0067] Specifically, when performing regulation, the priority can be set. Generally, the priority is to adjust the air inlet first, then adjust the motor, and finally adjust the air outlet.

[0068] Specifically, if the total noise value does not meet the noise decibel number of the corresponding mode selected by the user, the larger value of LA1 and LA3 is adjusted to reduce the total noise value until it meets the maximum noise decibel number of the corresponding mode selected by the user.

[0069] If the noise requirement is set to prioritize air volume, LA is controlled to be less than the maximum noise threshold. LA1 is set equal to LA, and the value of V is calculated in reverse according to the formula LA1 = (16-20) + 60lgV. Then, the current air volume Q4 corresponding to the air volume priority is calculated according to the formula Q4 = VS0, where S0 is the fixed area of ​​the cross section at the entrance of the range hood inlet.

[0070] The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the air volume priority control parameters.

[0071] Specifically, the maximum noise decibel number required for silent priority is lower than the maximum noise decibel number required for air volume priority, but both are limited to the noise value not exceeding 73dB(A).

[0072] Furthermore, based on the larger value of Q1 and Q2 as the minimum operating air volume of the range hood, the current air volume Q3 corresponding to the silent priority and the current air volume Q4 corresponding to the air volume priority must both be greater than the minimum operating air volume of the range hood. After comparison, the target air volume Q5 required by the range hood is finally obtained.

[0073] Specifically, the minimum air volume of the range hood must be met to achieve the effect of extracting oil smoke and preventing oil smoke from flowing back.

[0074] Furthermore, according to the target air volume Q5 required by the range hood, the corresponding fan speed n is obtained, specifically including:

[0075] Retrieve the original air volume and the corresponding original speed of the fan from the database. The air volume is proportional to the speed, that is, the relationship between the air volume and the speed can be expressed as:

[0076] Q0 / Q5=n0 / n;

[0077] Among them, Q0 represents the original air volume of the fan in the database, n0 represents the corresponding original speed, Q0 / n0 is the original data in the database, and Q5 is the final target air volume required by the range hood;

[0078] Then calculate the target fan speed corresponding to the final target air volume required by the range hood, that is:

[0079] n=n0×Q5 / Q0;

[0080] Where n is the target fan speed corresponding to the required air volume of the range hood;

[0081] According to the target fan speed of the range hood, the corresponding air pressure is obtained, including:

[0082] Retrieve the original wind pressure value and the corresponding original speed of the fan from the database. Based on the fact that wind pressure is proportional to the square of the speed, the relationship between wind pressure and speed can be expressed as:

[0083] P0 / P=(n0 / n) 2 ;

[0084] Among them, P0 represents the original wind pressure data in the database (P0 is measured for different fans or range hoods when they leave the factory), n0 represents the corresponding original speed, is the original data of the database, n is the target speed of the range hood fan;

[0085] Then calculate the wind pressure P corresponding to the fan target speed, that is:

[0086] P=P0×(n / n0) 2 ;

[0087] Wherein, P is the wind pressure corresponding to the target speed n of the fan.

[0088] Furthermore, the wind pressure P corresponding to the fan target speed n is compared with the static pressure value R:

[0089] If the wind pressure P is greater than the static pressure value R, the static pressure value requirement is met;

[0090] If the wind pressure P is equal to the static pressure value R, or is less than the static pressure value R and greater than 90% of the static pressure value R, then the error margin is met and the static pressure value requirement is also met;

[0091] If the wind pressure P is less than 90% of the static pressure value R, the fan speed is increased, and the fan target speed n is increased by 2%-5%.

[0092] Furthermore, the specific method for obtaining the control parameters and obtaining the corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle is: calling the database to obtain the corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle. The database includes a data set that forms a corresponding relationship according to the different fan speeds of the range hood, the air flow control area S1 corresponding to the air inlet, the opening and closing angles of the air inlet baffle, and the opening and closing angles of the air outlet baffle. By calling the data set, the opening and closing angles of the air inlet baffle and the air outlet baffle are obtained using the corresponding relationship.

[0093] Specifically, the opening and closing angles of the corresponding air inlet and outlet baffles can be determined based on the airflow control area S1, that is, the corresponding relationship between the airflow control area S1 and the opening and closing angle is such that the larger the opening and closing angle, the larger the airflow control area S1. The specific data set can be obtained through limited measurement or calculation of the product. This data set is stored in the database as one of the contents for retrieval.

[0094] Furthermore, the data set is a discrete data set. When no corresponding relationship data can be found in the data set, the opening and closing angles of the air inlet baffle and the air outlet baffle are calculated using an interpolation method or an approximation method.

[0095] Specifically, interpolation is a mathematical method and technique for estimating or "filling in" the function value at unknown data points using known, discrete data points; approximation is to take the closest data; both interpolation and approximation are existing technologies.

[0096] A system for user-defined design of a range hood applies the control method for a user-defined design of a range hood as described in any one of the above.

[0097] Compared with the prior art, the present invention achieves the following beneficial effects:

[0098] This invention provides a control method and system for user-customized range hood design, integrating personalized needs with efficient range hood management. The user first inputs specific housing data into the control system, which then processes and analyzes the data, generates range hood data and control parameters tailored to the specific housing environment, and then controls the range hood. Users can obtain range hood data tailored to their specific housing conditions, meeting customized needs and achieving the goal of intelligent range hood data generation and control.

[0099] By customizing the range hood's control method based on residential data, the range hood can more accurately match the kitchen's oil fume production, thereby improving fume extraction efficiency. This helps maintain fresh kitchen air and reduces the health risks of oil fume to the cook and family members. Adjusting the air volume based on actual needs avoids unnecessary energy consumption and noise, achieving energy savings and noise reduction while ensuring effective extraction and extraction, and improving convenience and comfort.

[0100] According to the housing data and layout, the fan, speed, static pressure and air volume data are optimized to reduce wind resistance and noise, prevent oil fume leakage and oil fume backflow in the public flue, improve the exhaust effect of the range hood, and enhance the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0101] Figure 1 This is a flow chart of a control method for a user-defined range hood provided by an embodiment of the present invention;

[0102] Figure 2 This is a detailed flow chart of a control method for a user-defined range hood provided by an embodiment of the present invention;

[0103] Figure 3 1 is a schematic diagram of a range hood structure according to a method for controlling a range hood designed by a user according to an embodiment of the present invention;

[0104] Figure 4 Schematic diagram of the air duct system structure of a user-defined range hood control method provided by an embodiment of the present invention;

[0105] Figure 5 1 is a schematic diagram of an air outlet structure of a user-defined range hood control method provided by an embodiment of the present invention;

[0106] Figure 6 The present invention provides a user-defined control method for a range hood provided by an embodiment of the present invention.

[0107] Reference numerals:

[0108] 1. Air inlet; 11. Upper air inlet baffle; 12. Lower air inlet baffle; 2. Air outlet; 21. First air outlet baffle; 22. Second air outlet baffle; 3. Air duct system; 4. Control panel. DETAILED DESCRIPTION

[0109] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0110] Example

[0111] like Figures 1 to 6A control method for a user-defined range hood includes establishing a database including conventional parameters, and accessing the database data through a control system. The database is established to facilitate access to some existing parameters, namely conventional parameters. Some measured, calculated, or national standard data (such as per capita air volume parameters accessed in D2.12, resistance coefficient accessed in D2.21, transmission noise data accessed in D2.32, and data sets corresponding to the fan's original air volume and corresponding original speed, different fan speeds of the range hood, airflow control area S1 corresponding to the air inlet, opening and closing angles of the air inlet baffle, and opening and closing angles of the air outlet baffle) are stored in advance as part of the database content to obtain control parameters and control the range hood. The method specifically includes the following steps:

[0112] D1. User personalized input step: The user inputs scene data and noise requirements through the control panel 4, wherein the noise requirements include quiet priority and air volume priority;

[0113] The range hood includes an air duct system 3, a control panel 4, an air inlet 1, and an air outlet 2; the control panel 4 has a built-in control system; the air duct system 3 is equipped with a fan, a volute, an impeller, and a guide ring; the air inlet 1 is equipped with an air inlet baffle, and the air outlet 2 is equipped with an air outlet baffle; the air flow control area corresponding to the air inlet 1 is changed by rotating the air inlet baffle; and the air outlet resistance of the range hood outlet is changed by rotating the air outlet baffle.

[0114] The air inlet baffle and the air outlet baffle are respectively composed of one or more baffles, or the air inlet baffle and the air outlet baffle are in a shutter structure.

[0115] The air outlet baffle includes a first air outlet baffle 21 or a second air outlet baffle 22, and the corresponding rotation control opening and closing angle range is 0°-90°; that is, α = 0°-90°; the air inlet baffle includes an upper air inlet baffle 11 and a lower air inlet baffle 12. When the upper air inlet baffle 11 is rotated, the corresponding control opening and closing angle range is 0°-90°, that is, β = 0°-90°, and when the lower air inlet baffle 12 is rotated, the corresponding control opening and closing angle range is 0°-30°, that is, δ = 0°-30°;

[0116] The control system changes the air volume and noise by regulating the fan speed and the opening and closing angles of the air inlet baffle and the air outlet baffle.

[0117] D2. Calculating output data step: The control system calculates corresponding range hood output data based on the input scene data and noise requirements. The range hood output data includes minimum air volume data, static pressure data, and noise data.

[0118] The scene data includes kitchen area, floor height (specifically the height of the current floor), family size, total number of floors, and the floor number;

[0119] The calculation method of the minimum air volume data includes:

[0120] D2.11. Based on the kitchen area and floor height, retrieve the corresponding ventilation parameters from the database to obtain the required air volume Q1, i.e., Q1 = S × H × C1. Where S represents the kitchen area, H represents the floor height, and C1 is the ventilation parameter, i.e., the number of air changes per hour.

[0121] For example, a kitchen area of ​​10 square meters, a floor height of 2.8 meters, and an air exchange rate of 3 times / hour (usually greater than 3 times), that is, S is 10 square meters, H is 2.8 meters, C1 is 3 times / hour, and the required fresh air volume Q1 = 10 × 2.8 × 3 = 84 cubic meters;

[0122] D2.12. Based on the number of family members, retrieve the corresponding per capita air volume parameter from the database to obtain the required air volume Q2, i.e., Q2 = N × C2; where N is the number of family members and C2 is the per capita air volume parameter, i.e., the air volume required per person per hour;

[0123] For example, a family of three requires 30 cubic meters of fresh air per person per hour, that is, N is 3 people, C2 is 30 cubic meters / hour, and the required fresh air volume Q2 = 3×30 = 90 cubic meters.

[0124] D2.13. Based on the required air volumes Q1 and Q2, compare the values ​​of Q1 and Q2 and take the larger value of Q1 and Q2 as the minimum operating air volume Q of the range hood. w .

[0125] That is, Q1 is 84 cubic meters and Q2 is 90 cubic meters, then the calculated value of Q2, 90 cubic meters, is taken as the minimum air volume of the range hood.

[0126] Specifically, D2.11 calculates the required air volume based on the kitchen area and the internal housing height, and the ventilation parameters are obtained by retrieving data from the database; D2.12 calculates the required air volume based on the number of family members, and the per capita air volume parameters are also obtained by retrieving data from the database; the larger value of the two calculation results is taken as the minimum air volume value that meets the requirements of the range hood.

[0127] Specifically, ventilation parameters and per capita air volume parameters refer to GB / T18883-2002 "Indoor Air Quality Standard" and GB50736-2012 "Design Code for Heating, Ventilation and Air Conditioning in Civil Buildings".

[0128] The calculation methods for static pressure data include:

[0129] D2.21. Based on the total number of floors and the floor number, retrieve the corresponding resistance coefficient from the database. Different floor heights correspond to different resistance coefficients.

[0130] The total number of floors is F, the floor number is f; F1, F2, F3 are floor constants, and F1<F2<F3;

[0131] If 1≤F≤F1 or F>F3, the corresponding resistance coefficient is K1;

[0132] If F1<F≤F3, and F1<f≤F2, the corresponding resistance coefficient is K2;

[0133] If F1<F≤F3, and F2<f≤F3, the corresponding resistance coefficient is K3;

[0134] D2.22. Obtain the static pressure value corresponding to the range hood based on the required working air volume of the range hood, that is:

[0135] R=K*Q w 2 ;

[0136] Where R is the static pressure value corresponding to the range hood, K is determined according to the total number of floors and the resistance coefficient corresponding to the floor number, and the value is K1, K2 or K3, Q w is the minimum working air volume during the operation of the range hood; the obtained static pressure value R is the corresponding static pressure data.

[0137] Specifically, since different floor heights correspond to different resistance coefficients, a method of classifying and selecting resistance coefficients is adopted for floors with different total number of floors. A method of classifying and selecting resistance coefficients is also adopted for residents on different floors to obtain accurate static pressure values. The corresponding resistance coefficient is selected according to the total number of floors and the corresponding floors, and the static pressure value is calculated.

[0138] For example, F1 is 6 stories, F2 is 13 stories, and F3 is 24 stories; that is, if the total number of floors is 6 or less or 24 or more, the corresponding resistance coefficient is K1, which takes into account the ground floor buildings of 6 stories or less, including single-family villas, single-story buildings and other lower houses;

[0139] If the total number of floors is between 6 and 24, it is considered a high-rise residential building. For residents living on floors 6 to 13, the corresponding resistance coefficient is K2; for residents living on floors 14 to 24, the corresponding resistance coefficient is K3. Different resistance coefficients are used based on the total number of floors and the floor number to obtain accurate static pressure values.

[0140] Specifically, the selection of the resistance coefficient can refer to the national standard, GB-T 17713-2022 "Ranger hoods and other cooking fume suction and exhaust devices".

[0141] Specifically, the working air volume Q of the range hood during operation wIt can be obtained by calling the database or based on actual scenario requirements.

[0142] The calculation methods of noise data include:

[0143] D2.31. Obtain a total noise value through a noise calculation module. The total noise value includes air volume noise value, transmission noise value, and fan noise value.

[0144] The calculation method of the air volume noise value is to retrieve the corresponding air flow control area S1 in the database according to the opening and closing angle of the air inlet baffle, and the wind speed of the air flow at the range hood air inlet 1 is V=Q w / S1, where Q w It is the minimum working air volume of the range hood during operation;

[0145] According to the obtained wind speed value, the air volume noise value is calculated, that is, LA1 = (16 ~ 20) + 60lgV, where V is the wind speed of the air flow at the range hood air inlet 1, and LA1 is the air volume noise value;

[0146] D2.32. Retrieve the transmission noise data from the database and obtain the transmission noise value LA2;

[0147] D2.33. Calculate and obtain the fan noise value LA3;

[0148] D2.34. Calculate the total noise value, that is:

[0149] LA=10*lg(10 LA1 / 10 +10 LA2 / 10 +10 LA3 / 10 );

[0150] Where LA represents the total noise value.

[0151] Specifically, there are three main factors that affect noise, namely airflow regeneration noise, mechanical vibration noise, and fan noise. Airflow regeneration noise specifically corresponds to the air volume noise value, mechanical vibration noise specifically corresponds to the transmission noise value, and fan noise specifically corresponds to the fan noise value.

[0152] The transmission noise value corresponding to the mechanical vibration noise is directly retrieved from the database. In the process of building the database, the noise data generated by the mechanical vibration or transmission is included.

[0153] The air volume noise value corresponding to the airflow regeneration noise is adjusted by changing the opening and closing angles of the air inlet 1 and the air outlet 2. Due to the change in the opening and closing angles, the control area corresponding to the air inlet 1 and the air outlet 2 changes, which in turn affects the noise level. In the process of calculating and adjusting the noise value, it must always be ensured that the required air volume cannot be lower than the minimum air volume required by the range hood.

[0154] In D2.33, the specific method for obtaining the fan noise value LA3 is:

[0155]

[0156] Among them, q v Indicates the fan volume flow rate (equivalent to the real-time air volume Q when the range hood is working), P tF Indicates the total pressure value (equal to the dynamic pressure value + static pressure value, where the dynamic pressure value is 1 / 2ρV 2 , ρ is the fluid density, V is the flow velocity (such as wind speed); the fan noise value corresponding to LA3 can also be formed into a database, and the value of LA3 can be obtained by calling the database.

[0157] D3. Obtaining control parameters: Based on the obtained range hood output data, the control system accesses the database to obtain the corresponding control parameters;

[0158] The control parameters include the fan speed, the opening and closing angles of the air inlet baffle and the air outlet baffle.

[0159] Setting a maximum noise threshold and a silence priority threshold, wherein the silence priority threshold is smaller than the maximum noise threshold; and the total noise value is lower than the maximum noise threshold;

[0160] If the noise requirement is selected as quiet priority, the total noise value shall not be greater than the quiet priority threshold;

[0161] If the noise requirement is selected as air volume priority, the total noise value shall not be greater than the maximum noise threshold.

[0162] If the noise requirement is silent priority and the total noise value is greater than the silent priority threshold, the size of LA1 and LA3 is determined;

[0163] If LA1>LA3: change the opening and closing angle of the air inlet baffle, increase the air flow control area S1 corresponding to the air inlet 1, and reduce the air volume noise value LA1;

[0164] The airflow control area S1 has a maximum control area and a minimum control area. S1 is located between the maximum control area and the minimum control area, and the corresponding LA1 has a corresponding minimum value.

[0165] If the total noise value is still greater than the quiet priority threshold when LA1 is reduced to the minimum value, the fan speed is reduced to reduce the fan noise value LA3;

[0166] If the air volume value corresponding to the reduced fan speed is not less than the minimum air volume of the range hood, the fan speed has the corresponding minimum speed, and the corresponding LA3 has the corresponding minimum value;

[0167] If the total noise level is still greater than the mute priority threshold when LA3 is reduced to the minimum value, the air outlet baffle opening and closing angle will be changed until the total noise level is no greater than the mute priority threshold or the air outlet baffle opening and closing angle reaches the maximum;

[0168] At this time, the total noise value meets the noise requirement when quiet priority is given, and then the current air volume Q3 corresponding to quiet priority is obtained according to the current state of the range hood;

[0169] The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the control parameters with silent priority.

[0170] If LA1 < LA3: reduce the fan speed and reduce the fan noise value LA3;

[0171] If the total noise level is still greater than the mute priority threshold when LA3 is reduced to the minimum value, the opening and closing angle of the air inlet baffle is changed to increase the airflow control area S1 corresponding to the air inlet 1 and reduce the air volume noise level LA1.

[0172] If the total noise level is still greater than the mute priority threshold when LA1 is reduced to the minimum value, the opening and closing angle of the air baffle will be changed until the total noise level is no greater than the mute priority threshold or the opening and closing angle of the air baffle reaches the maximum;

[0173] At this time, the total noise value meets the noise requirement when quiet priority is given, and then the current air volume Q3 corresponding to quiet priority is obtained according to the current state of the range hood;

[0174] The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the control parameters with silent priority.

[0175] Specifically, when performing regulation, the priority order can be set. Generally, the priority order is to adjust the air inlet 1 first, then adjust the motor, and finally adjust the air outlet 2.

[0176] Specifically, if the total noise value does not meet the noise decibel number of the corresponding mode selected by the user, the larger value of LA1 and LA3 is adjusted to reduce the total noise value until it meets the maximum noise decibel number of the corresponding mode selected by the user.

[0177] The silence priority threshold may be 65dB(A) and the maximum noise threshold may be 73dB(A).

[0178] If the noise requirement is set to prioritize air volume, LA is controlled to be less than the maximum noise threshold. LA1 is set equal to LA, and the value of V is calculated in reverse according to the formula LA1 = (16-20) + 60lgV. Then, the current air volume Q4 corresponding to the air volume priority is calculated according to the formula Q4 = VS0, where S0 is the fixed area of ​​the cross section at the entrance of the range hood inlet.

[0179] The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the air volume priority control parameters.

[0180] Specifically, the maximum noise decibel number required for silent priority is lower than the maximum noise decibel number required for air volume priority, but both are limited to the noise value not exceeding 73dB(A).

[0181] According to the larger value of Q1 and Q2 as the minimum operating air volume of the range hood, the current air volume Q3 corresponding to the silent priority and the current air volume Q4 corresponding to the air volume priority must both be greater than the minimum operating air volume of the range hood. After comparison, the target air volume Q5 required by the range hood is finally obtained.

[0182] Specifically, the minimum air volume of the range hood must be met to achieve the effect of extracting oil smoke and preventing oil smoke from flowing back.

[0183] According to the target air volume Q5 required by the range hood, the corresponding fan speed n is obtained, specifically including:

[0184] Retrieve the original air volume and the corresponding original speed of the fan from the database. The air volume is proportional to the speed, that is, the relationship between the air volume and the speed can be expressed as:

[0185] Q0 / Q5=n0 / n;

[0186] Among them, Q0 represents the original air volume of the fan in the database, n0 represents the corresponding original speed, Q0 / n0 is the original data in the database, and Q5 is the final target air volume required by the range hood;

[0187] Then calculate the target fan speed corresponding to the final target air volume required by the range hood, that is:

[0188] n=n0×Q5 / Q0;

[0189] Where n is the target fan speed corresponding to the required air volume of the range hood;

[0190] According to the target fan speed of the range hood, the corresponding air pressure is obtained, including:

[0191] Retrieve the original wind pressure value and the corresponding original speed of the fan from the database. Based on the fact that wind pressure is proportional to the square of the speed, the relationship between wind pressure and speed can be expressed as:

[0192] P0 / P=(n0 / n) 2 ;

[0193] Among them, P0 represents the original wind pressure data in the database (P0 is measured for different fans or range hoods when they leave the factory), n0 represents the corresponding original speed, is the original data of the database, n is the target speed of the range hood fan;

[0194] Then calculate the wind pressure P corresponding to the fan target speed, that is:

[0195] P=P0×(n / n0) 2 ;

[0196] Wherein, P is the wind pressure corresponding to the target speed n of the fan.

[0197] Compare the wind pressure P corresponding to the fan target speed n with the static pressure value R:

[0198] If the wind pressure P is greater than the static pressure value R, the static pressure value requirement is met;

[0199] If the wind pressure P is equal to the static pressure value R, or is less than the static pressure value R and greater than 90% of the static pressure value R, then the error margin is met and the static pressure value requirement is also met;

[0200] If the wind pressure P is less than 90% of the static pressure value R, the fan speed is increased, and the fan target speed n is increased by 2%-5%.

[0201] The specific method for obtaining the control parameters and the corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle is as follows: the database is retrieved to obtain the corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle. The database includes a data set that forms a corresponding relationship according to different fan speeds of the range hood, the air flow control area S1 corresponding to the air inlet 1, the opening and closing angles of the air inlet baffle, and the opening and closing angles of the air outlet baffle. By retrieving the data set, the opening and closing angles of the air inlet baffle and the air outlet baffle are obtained using the corresponding relationship.

[0202] Specifically, the opening and closing angles of the corresponding air inlet and outlet baffles can be determined based on the airflow control area S1, that is, the corresponding relationship between the airflow control area S1 and the opening and closing angle is such that the larger the opening and closing angle, the larger the airflow control area S1. The specific data set can be obtained through limited measurement or calculation of the product. This data set is stored in the database as one of the contents for retrieval.

[0203] The data set is a discrete data set. When no corresponding relationship data is found in the data set, the opening and closing angles of the air inlet baffle and the air outlet baffle are calculated using an interpolation method or an approximation method.

[0204] Specifically, interpolation is a mathematical method and technique for estimating or "filling in" the function value at unknown data points using known, discrete data points; approximation is to take the closest data; both interpolation and approximation are existing technologies.

[0205] D4. Steps for regulating the operation of the range hood: The control system sends corresponding instructions to the range hood according to the regulation parameters, and regulates the operation process of the range hood according to the instructions corresponding to the regulation parameters.

[0206] A system for user-defined design of a range hood applies the control method for the user-defined design of a range hood as described above.

[0207] The present invention provides a control method and system for user-customized range hood design. According to the actual situation of the user's house, the user inputs housing parameters and preferred modes. The control system retrieves the database based on the acquired user data, automatically calculates and generates range hood data and control parameters, and controls the range hood to meet the range hood data requirements of the user's customized scenarios, more accurately match the kitchen's oil fume generation situation, improve the oil fume suction and exhaust efficiency, and improve the convenience of range hood design.

[0208] Based on the disclosure and teachings of the above description, those skilled in the art may also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and modifications and variations of the present invention should also fall within the scope of protection of the claims of the present invention. In addition, although certain specific terms are used in this description, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A control method for a user-defined range hood, wherein a database including conventional parameters is established, and the control system accesses the database data to obtain the control parameters and controls the range hood; characterized in that: The specific steps include: D1. User personalized input step: The user inputs scene data and noise requirements through the control panel, wherein the noise requirements include quietness priority and air volume priority; D2. Calculating output data step: The control system calculates corresponding range hood output data based on the input scene data and noise requirements. The range hood output data includes minimum air volume data, static pressure data, and noise data. D3. Obtaining control parameters: Based on the obtained range hood output data, the control system accesses the database to obtain the corresponding control parameters; D4. Steps for regulating the operation of the range hood: The control system sends corresponding instructions to the range hood according to the regulation parameters, and regulates the operation process of the range hood according to the instructions corresponding to the regulation parameters.

2. The control method for a user-defined range hood according to claim 1, characterized in that: The range hood includes an air duct system, a control panel, an air inlet, and an air outlet; the control panel has a built-in control system; the air duct system is provided with a fan, a volute, an impeller, and a guide ring; the air inlet is provided with an air inlet baffle, and the air outlet is provided with an air outlet baffle; the air flow control area corresponding to the air inlet is changed by rotating the air inlet baffle; and the air outlet resistance of the range hood air outlet is changed by rotating the air outlet baffle; The control parameters include the fan speed, the opening and closing angles of the air inlet baffle and the air outlet baffle.

3. The control method of a user-defined range hood according to claim 2, characterized in that: The air inlet baffle and the air outlet baffle are respectively composed of one or more baffles, or the air inlet baffle and the air outlet baffle are in a shutter structure.

4. The control method for a user-defined range hood according to claim 2, characterized in that: The air outlet baffle includes a first air outlet baffle or a second air outlet baffle, and the corresponding rotation control opening and closing angle range is 0°-90°; the air inlet baffle includes an upper air inlet baffle and a lower air inlet baffle. Rotating the upper air inlet baffle controls the opening and closing angle range to 0°-90°, and rotating the lower air inlet baffle controls the opening and closing angle range to 0°-30°. The control system changes the air volume and noise by regulating the fan speed and the opening and closing angles of the air inlet baffle and the air outlet baffle.

5. The control method for a user-defined range hood according to claim 1, characterized in that: The scene data includes kitchen area, floor height, family size, total number of floors, and floor number; The calculation method of the minimum air volume data includes: D2.

11. Based on the kitchen area and floor height, retrieve the corresponding ventilation parameters from the database to obtain the required air volume Q1, i.e., Q1 = S × H × C1. Where S represents the kitchen area, H represents the floor height, and C1 is the ventilation parameter, i.e., the number of air changes per hour. D2.

12. Based on the number of family members, retrieve the corresponding per capita air volume parameter from the database to obtain the required air volume Q2, i.e., Q2 = N × C2; where N is the number of family members and C2 is the per capita air volume parameter, i.e., the air volume required per person per hour; D2.

13. Based on the required air volumes Q1 and Q2, compare the values ​​of Q1 and Q2 and take the larger value of Q1 and Q2 as the minimum operating air volume Q of the range hood. w .

6. The control method for a user-defined range hood according to claim 5, characterized in that: The calculation methods for static pressure data include: D2.

21. Based on the total number of floors and the floor number, retrieve the corresponding resistance coefficient from the database. Different floor heights correspond to different resistance coefficients. The total number of floors is F, the floor number is f; F1, F2, F3 are floor constants, and F1<F2<F3; If 1≤F≤F1 or F>F3, the corresponding resistance coefficient is K1; If F1<F≤F3, and F1<f≤F2, the corresponding resistance coefficient is K2; If F1<F≤F3, and F2<f≤F3, the corresponding resistance coefficient is K3; D2.

22. Obtain the static pressure value corresponding to the range hood based on the required working air volume of the range hood, that is: R=K*Q w 2 ; Where R is the static pressure value corresponding to the range hood, K is determined according to the total number of floors and the resistance coefficient corresponding to the floor number, and the value is K1, K2 or K3, Q w is the minimum working air volume during the operation of the range hood; the obtained static pressure value R is the corresponding static pressure data.

7. The control method for a user-defined range hood according to claim 6, characterized in that: The calculation methods of noise data include: D2.

31. Obtain a total noise value through a noise calculation module. The total noise value includes air volume noise value, transmission noise value, and fan noise value. The calculation method of the air volume noise value is to retrieve the corresponding air flow control area S1 in the database according to the opening and closing angle of the air inlet baffle, and the wind speed of the air flow at the range hood inlet is V=Q w / S1, where Q w It is the minimum working air volume of the range hood during operation; According to the obtained wind speed value, the air volume noise value is calculated, that is, LA1 = (16 ~ 20) + 60lgV, where V is the wind speed of the air flow at the range hood inlet and LA1 is the air volume noise value; D2.

32. Retrieve the transmission noise data from the database and obtain the transmission noise value LA2; D2.

33. Calculate the fan noise value LA3. The specific method is: <h2 style=";text-align:left;direction:ltr">LA3=9.2+10lgq<h2 style=";text-align:left;direction:ltr"> v <h2 style=";text-align:left;direction:ltr"> P<h2 style=";text-align:left;direction:ltr"> 2 <h2 style=";text-align:left;direction:ltr"> tF <h2 style=";text-align:left;direction:ltr"> ; Among them, q v Indicates the fan volume flow rate, P tF Indicates the full pressure value; D2.

34. Calculate the total noise value, that is: LA=10*lg(10 LA1 / 10 +10 LA2 / 10 +10 LA3 / 10 ); Where LA represents the total noise value.

8. The control method for a user-defined range hood according to claim 7, characterized in that: Setting a maximum noise threshold and a silence priority threshold, wherein the silence priority threshold is smaller than the maximum noise threshold; and the total noise value is lower than the maximum noise threshold; If the noise requirement is selected as quiet priority, the total noise value shall not be greater than the quiet priority threshold; If the noise requirement is selected as air volume priority, the total noise value shall not be greater than the maximum noise threshold.

9. The control method for a user-defined range hood according to claim 8, characterized in that: If the noise requirement is silent priority and the total noise value is greater than the silent priority threshold, the size of LA1 and LA3 is determined; If LA1>LA3: change the opening and closing angle of the air inlet baffle, increase the air flow control area S1 corresponding to the air inlet, and reduce the air volume noise value LA1; The airflow control area S1 has a maximum control area and a minimum control area. S1 is located between the maximum control area and the minimum control area, and the corresponding LA1 has a corresponding minimum value. If the total noise value is still greater than the quiet priority threshold when LA1 is reduced to the minimum value, the fan speed is reduced to reduce the fan noise value LA3; If the air volume value corresponding to the reduced fan speed is not less than the minimum air volume of the range hood, the fan speed has the corresponding minimum speed, and the corresponding LA3 has the corresponding minimum value; If the total noise level is still greater than the mute priority threshold when LA3 is reduced to the minimum value, the air outlet baffle opening and closing angle will be changed until the total noise level is no greater than the mute priority threshold or the air outlet baffle opening and closing angle reaches the maximum; At this time, the total noise value meets the noise requirement when quiet priority is given, and then the current air volume Q3 corresponding to quiet priority is obtained according to the current state of the range hood; The corresponding fan speed, opening and closing angles of the air inlet and outlet baffles are the control parameters for silent priority; If LA1 < LA3: reduce the fan speed and reduce the fan noise value LA3; If the total noise value is still greater than the quiet priority threshold when LA3 is reduced to the minimum value, the opening and closing angle of the air inlet baffle is changed to increase the air flow control area S1 corresponding to the air inlet and reduce the air volume noise value LA1; If the total noise level is still greater than the mute priority threshold when LA1 is reduced to the minimum value, the opening and closing angle of the air baffle will be changed until the total noise level is no greater than the mute priority threshold or the opening and closing angle of the air baffle reaches the maximum; At this time, the total noise value meets the noise requirement when quiet priority is given, and then the current air volume Q3 corresponding to quiet priority is obtained according to the current state of the range hood; The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the control parameters with silent priority.

10. The control method of a user-defined range hood according to claim 8 or 9, characterized in that: If the noise requirement is set to prioritize air volume, LA is controlled to be less than the maximum noise threshold. LA1 is set equal to LA, and the value of V is calculated in reverse according to the formula LA1 = (16-20) + 60lgV. Then, the current air volume Q4 corresponding to the air volume priority is calculated according to the formula Q4 = VS0, where S0 is the fixed area of ​​the cross section at the entrance of the range hood inlet. The corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle are the air volume priority control parameters.

11. The control method of a user-defined range hood according to claim 10, characterized in that: According to the larger value of Q1 and Q2 as the minimum operating air volume of the range hood, the current air volume Q3 corresponding to the silent priority and the current air volume Q4 corresponding to the air volume priority must both be greater than the minimum operating air volume of the range hood. After comparison, the target air volume Q5 required by the range hood is finally obtained.

12. The control method of a user-defined range hood according to claim 11, characterized in that: According to the target air volume Q5 required by the range hood, the corresponding fan speed n is obtained, specifically including: Retrieve the original air volume and the corresponding original speed of the fan from the database. The air volume is proportional to the speed, that is, the relationship between the air volume and the speed can be expressed as: Q0 / Q5=n0 / n; Among them, Q0 represents the original air volume of the fan in the database, n0 represents the corresponding original speed, Q0 / n0 is the original data in the database, and Q5 is the final target air volume required by the range hood; Then calculate the target fan speed corresponding to the final target air volume required by the range hood, that is: n=n0×Q5 / Q0; Where n is the target fan speed corresponding to the required air volume of the range hood; According to the target fan speed of the range hood, the corresponding air pressure is obtained, including: Retrieve the original wind pressure value and the corresponding original speed of the fan from the database. Based on the fact that wind pressure is proportional to the square of the speed, the relationship between wind pressure and speed can be expressed as: P0 / P=(n0 / n) 2 ; Among them, P0 represents the original wind pressure data in the database, n0 represents the corresponding original speed, is the original data of the database, n is the target speed of the range hood fan; Then calculate the wind pressure P corresponding to the fan target speed, that is: P=P0×(n / n0) 2 ; Wherein, P is the wind pressure corresponding to the target speed n of the fan.

13. The control method of a user-defined range hood according to claim 12, characterized in that: Compare the wind pressure P corresponding to the fan target speed n with the static pressure value R: If the wind pressure P is greater than the static pressure value R, the static pressure value requirement is met; If the wind pressure P is equal to the static pressure value R, or is less than the static pressure value R and greater than 90% of the static pressure value R, then the error margin is met and the static pressure value requirement is also met; If the wind pressure P is less than 90% of the static pressure value R, the fan speed is increased, and the fan target speed n is increased by 2%-5%.

14. The control method of a user-defined range hood according to claim 12, characterized in that: The specific method for obtaining the control parameters and the corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle is as follows: the database is retrieved to obtain the corresponding fan speed, opening and closing angles of the air inlet baffle and the air outlet baffle. The database includes a data set that forms a corresponding relationship according to different fan speeds of the range hood, the air flow control area S1 corresponding to the air inlet, the opening and closing angles of the air inlet baffle, and the opening and closing angles of the air outlet baffle. By retrieving the data set, the opening and closing angles of the air inlet baffle and the air outlet baffle are obtained using the corresponding relationship.

15. The control method of a user-defined range hood according to claim 14, characterized in that: The data set is a discrete data set. When no corresponding relationship data is found in the data set, the opening and closing angles of the air inlet baffle and the air outlet baffle are calculated using an interpolation method or an approximation method.

16. A system for user-defined design of range hoods, characterized in that: A control method for a user-defined range hood as claimed in any one of claims 1 to 15 is applied.

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