A control method and device of an extractor hood, the extractor hood and a storage medium

Abstract

The application discloses a control method and device of an extractor hood, the extractor hood and a storage medium, and the method comprises the following steps: calling an oil fume sensor to detect a real-time concentration value of oil fume in an environment where the extractor hood is located; setting multiple gears for a fan used for sucking away oil fume, and each gear is mapped to an original concentration range; adjusting the original concentration range to a candidate concentration range which is adapted to the degree of contamination of the oil fume sensor; and adjusting the gear where the fan is located according to the relationship between the real-time concentration value and the candidate concentration range. According to the application, the original concentration range mapped by the gear is compensated according to the degree of contamination of the oil fume sensor, the deviation between the real-time concentration value detected by the oil fume sensor under the contaminated condition and the actual concentration value of the oil fume is corrected, the accuracy of detecting the concentration value of the oil fume is improved, the gear of the fan is adapted to the actual concentration value of the oil fume, the electric energy is saved, and the noise is reduced under the condition that the oil fume is sucked up.

Description

Technical Field

[0001] This invention relates to the technical field of range hoods, and more particularly to a control method, device, range hood, and storage medium for a range hood. Background Technology

[0002] Currently, the oil fume sensing function is a development trend for range hoods and integrated cooktops. It can adaptively adjust the fan speed according to the concentration of oil fumes, making the range hood more intelligent. While ensuring complete removal of oil fumes, it saves energy and reduces noise.

[0003] The fume sensing function is provided by a fume sensor, which usually uses the principle of optical illumination. After the range hood has been used for a long time, the optical components of the fume sensor will be contaminated, causing a certain deviation between the detected value and the actual value. This results in the fan setting being too high, increasing power consumption and noise. Summary of the Invention

[0004] This invention provides a control method, device, range hood, and storage medium for a range hood, in order to solve the problem of how to improve the accuracy of adjusting the fan speed.

[0005] According to one aspect of the present invention, a control method for a range hood is provided, comprising:

[0006] The fume sensor is invoked to detect the real-time concentration of oil fumes in the environment where the range hood is located;

[0007] The fan used to remove the fumes is equipped with multiple speed settings, each of which maps to the original concentration range;

[0008] The original concentration range is adjusted to a candidate concentration range that matches the degree of contamination of the oil fume sensor;

[0009] The fan speed is adjusted based on the relationship between the real-time concentration value and the candidate concentration range.

[0010] Optionally, the fan used to remove the fumes is equipped with multiple speed settings, including:

[0011] The maximum concentration of cooking fumes detected by the fume sensor in the environment where the range hood is located is queried.

[0012] The range from zero to the maximum concentration value is defined as the concentration range;

[0013] The fan used to remove the oil fumes is equipped with multiple speed settings;

[0014] The concentration range is divided into multiple original concentration ranges according to the multiple gear positions;

[0015] A mapping relationship is established between the multiple gear levels and the multiple original concentration ranges.

[0016] Optionally, dividing the concentration range into multiple original concentration ranges according to the multiple gear levels includes:

[0017] Calculate the ratio between the maximum concentration value and the number of the multiple concentration levels;

[0018] Within the concentration range, each interval of the ratio is used to divide an initial concentration range.

[0019] Optionally, adjusting the original concentration range to a candidate concentration range that matches the degree of contamination of the oil fume sensor includes:

[0020] A compensation concentration value is generated based on the degree of contamination of the oil fume sensor.

[0021] The compensation oil fume value is added to the upper and / or lower limits of the original concentration range to obtain a candidate concentration range that matches the degree of contamination of the oil fume sensor.

[0022] Optionally, generating a compensation concentration value according to the degree of contamination of the oil fume sensor includes:

[0023] The baseline concentration value of cooking fumes detected by the fume sensor in the environment is queried under conditions where cooking is not taking place and the fume sensor is not contaminated.

[0024] The deviation concentration value of oil fumes detected by the oil fume sensor in the environment is queried under conditions where cooking is not taking place and the oil fume sensor is already contaminated.

[0025] The compensation concentration value is obtained by subtracting the baseline oil fume value from the deviation oil fume value.

[0026] Optionally, adjusting the fan speed based on the relationship between the real-time concentration value and the candidate concentration range includes:

[0027] The candidate concentration range corresponding to the current gear position of the fan is determined as the target concentration range;

[0028] If the real-time oil fume value is greater than the upper limit of the target concentration range, then the stability test is performed to verify that the real-time oil fume value is greater than the upper limit of the target concentration range.

[0029] If the real-time oil fume value is greater than the upper limit of the target concentration range and the verification is passed, then the speed of the fan is increased.

[0030] If the real-time oil fume value is less than the lower limit of the target concentration range, then the stability test is performed to verify that the real-time oil fume value is less than the lower limit of the target concentration range.

[0031] If the real-time oil fume value is less than the lower limit of the target concentration range and passes the verification, then the fan speed is lowered.

[0032] Optionally, the step of verifying the real-time oil fume value to be greater than the upper limit of the target concentration range under stability conditions includes:

[0033] Multiple real-time concentration values ​​collected within a preset time period in the future are obtained as a first concentration sequence;

[0034] Remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the first concentration sequence;

[0035] If the removal is complete, the average value of the remaining real-time concentration values ​​in the first concentration sequence pool is calculated as the first average concentration value.

[0036] If the first average concentration value is greater than the upper limit of the target concentration range, then the real-time oil fume value is determined to be greater than the upper limit of the target concentration range, thus passing the verification.

[0037] Optionally, the step of verifying that the real-time oil fume value is less than the lower limit of the target concentration range under stability conditions includes:

[0038] Multiple real-time concentration values ​​collected within a preset time period in the future are obtained as a second concentration sequence;

[0039] Remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the second concentration sequence;

[0040] If the removal is complete, the average value of the remaining real-time concentration values ​​in the second concentration sequence pool is calculated as the second average concentration value;

[0041] If the second average concentration value is less than the lower limit of the target concentration range, then the real-time oil fume value is determined to be less than the lower limit of the target concentration range, thus passing the verification.

[0042] According to another aspect of the present invention, a control device for a range hood is provided, comprising:

[0043] The real-time concentration detection module is used to call the oil fume sensor to detect the real-time concentration of oil fumes in the environment where the range hood is located;

[0044] The gear setting module is used to set multiple gears for the fan used to remove the oil fumes, and each gear is mapped to the original concentration range;

[0045] A concentration range adjustment module is used to adjust the original concentration range to a candidate concentration range that matches the degree of contamination of the oil fume sensor;

[0046] The gear adjustment module is used to adjust the gear position of the fan according to the relationship between the real-time concentration value and the candidate concentration range.

[0047] Optionally, the gear setting module includes:

[0048] The maximum concentration value query module is used to query the maximum concentration value of oil fumes detected by the oil fume sensor in the environment where the range hood is located.

[0049] A concentration range setting module is used to set the concentration range from zero to the maximum concentration value;

[0050] The gear configuration module is used to configure multiple gears for the fan used to remove the oil fumes;

[0051] The original concentration range division module is used to divide the concentration range into multiple original concentration ranges according to the multiple gear positions;

[0052] The mapping relationship establishment module is used to establish mapping relationships between the multiple gear levels and the multiple original concentration ranges respectively.

[0053] Optionally, the original concentration range division module includes:

[0054] The ratio calculation module is used to calculate the ratio between the maximum concentration value and the number of multiple gear levels;

[0055] The ratio division module is used to divide the concentration range into an original concentration range at intervals of the ratio value.

[0056] Optionally, the concentration range adjustment module includes:

[0057] The compensation concentration value generation module is used to generate a compensation concentration value according to the degree of contamination of the oil fume sensor;

[0058] The compensation concentration value addition module is used to add the compensation oil fume value to the upper limit and / or lower limit of the original concentration range to obtain a candidate concentration range that matches the degree of contamination of the oil fume sensor.

[0059] Optionally, the compensation concentration value generation module includes:

[0060] The baseline concentration value query module is used to query the baseline concentration value of oil fumes detected in the environment by the oil fume sensor under the conditions of no cooking and no contamination of the oil fume sensor;

[0061] The deviation concentration value query module is used to query the deviation concentration value of oil fumes detected by the oil fume sensor in the environment under the condition that cooking has not been carried out and the oil fume sensor has been contaminated.

[0062] The concentration value subtraction module is used to subtract the reference oil fume value from the deviation oil fume value to obtain the compensation concentration value.

[0063] Optionally, the gear adjustment module includes:

[0064] The target concentration range determination module is used to determine the candidate concentration range corresponding to the current gear position of the fan, as the target concentration range;

[0065] The upper-level verification module is used to verify that the real-time oil fume value is greater than the upper limit of the target concentration range if the real-time oil fume value is greater than the upper limit of the target concentration range under stability conditions.

[0066] The gear adjustment module is used to adjust the gear of the fan if the real-time oil fume value is greater than the upper limit of the target concentration range and the verification is passed.

[0067] The down-adjustment verification module is used to verify that the real-time oil fume value is less than the lower limit of the target concentration range under stability conditions if the real-time oil fume value is less than the lower limit of the target concentration range.

[0068] The gear reduction module is used to reduce the gear of the fan if the real-time oil fume value is less than the lower limit of the target concentration range and the verification is passed.

[0069] Optionally, the up-checking module includes:

[0070] The first concentration sequence acquisition module is used to acquire multiple real-time concentration values ​​collected within a preset time period in the future, as the first concentration sequence;

[0071] The first real-time concentration value removal module is used to remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the first concentration sequence.

[0072] The first average concentration value calculation module is used to calculate the average value of the remaining real-time concentration values ​​in the first concentration sequence pool if the removal is completed, and use it as the first average concentration value.

[0073] The up-adjustment verification module is used to determine that the real-time oil fume value is greater than the upper limit of the target concentration range if the first average concentration value is greater than the upper limit of the target concentration range, thus passing the verification.

[0074] Optionally, the down-adjustment verification module includes:

[0075] The second concentration sequence acquisition module is used to acquire multiple real-time concentration values ​​collected within a preset time period in the future, as a second concentration sequence;

[0076] The second real-time concentration value removal module is used to remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the second concentration sequence.

[0077] The second average concentration value calculation module is used to calculate the average value of the remaining real-time concentration values ​​in the second concentration sequence pool if the removal is completed, and use it as the second average concentration value.

[0078] The down-adjustment verification module is used to determine that the real-time oil fume value is less than the lower limit of the target concentration range if the second average concentration value is less than the lower limit of the target concentration range.

[0079] According to another aspect of the present invention, a range hood is provided, the range hood comprising:

[0080] At least one processor; and

[0081] A memory communicatively connected to the at least one processor; wherein,

[0082] The memory stores a computer program that can be executed by the at least one processor, which enables the at least one processor to perform the control method for the range hood according to any embodiment of the present invention.

[0083] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing a computer program, the computer program being configured to cause a processor to execute and implement the control method for a range hood according to any embodiment of the present invention.

[0084] In this embodiment, a fume sensor is used to detect the real-time concentration of cooking fumes in the environment where the range hood is located. Multiple speed settings are configured for the fan used to remove the fumes, each mapping to an original concentration range. The original concentration range is adjusted to a candidate concentration range that matches the degree of contamination of the fume sensor. The fan speed is adjusted based on the relationship between the real-time concentration value and the candidate concentration range. This embodiment compensates for the original concentration range mapped to the speed settings based on the degree of contamination of the fume sensor, correcting the deviation between the real-time concentration value detected by the fume sensor and the actual concentration value of the fumes when contaminated. This improves the accuracy of the detected fume concentration value, thereby ensuring that the fan speed matches the actual concentration value of the fumes, saving energy and reducing noise while effectively removing the fumes.

[0085] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0086] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0087] Figure 1 This is a flowchart of a control method for a range hood according to Embodiment 1 of the present invention;

[0088] Figure 2 This is a schematic diagram of the structure of a control device for a range hood according to Embodiment 2 of the present invention;

[0089] Figure 3 This is a schematic diagram of the structure of a range hood provided in Embodiment 3 of the present invention. Detailed Implementation

[0090] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0091] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0092] Example 1

[0093] Figure 1 This is a flowchart of a control method for a range hood provided in Embodiment 1 of the present invention. This embodiment is applicable to situations where the concentration of cooking fumes is adjusted based on the degree of contamination by the fume sensor, thereby regulating the fan speed. This method can be executed by a control device for the range hood, which can be implemented in hardware and / or software and can be configured within the range hood. Figure 1 As shown, the method includes:

[0094] Step 101: Call the oil fume sensor to detect the real-time concentration of oil fumes in the environment where the range hood is located.

[0095] A range hood (also known as a kitchen exhaust fan) is a kitchen appliance that purifies the kitchen environment. It is usually installed above the kitchen stove and can remove the waste from the stove combustion and the harmful fumes produced during cooking, exhausting them outdoors. At the same time, it condenses and collects the fumes, reducing pollution and purifying the air.

[0096] The range hood is equipped with at least one processor, which is the control center of the range hood. It connects to various components of the range hood through various interfaces and lines. By running or executing software programs and / or modules stored in the memory, and calling data stored in the memory, it performs various functions of the controller and processes data, thereby monitoring the controller as a whole.

[0097] Optional processors include MCUs (Microcontroller Units, also known as single-chip microcomputers), PLCs (Programmable Logic Controllers), and so on.

[0098] Range hoods are equipped with oil fume sensors, also known as oil fume monitors, which are mainly responsible for monitoring the concentration of oil fumes.

[0099] Taking photoelectric fume sensors as an example, most photoelectric fume sensors are through-beam photoelectric sensors, which consist of an independent transmitter and a receiver. The detection distance can reach several meters or even tens of meters, and they can be used to detect the concentration of oil fumes.

[0100] In this embodiment, when the range hood is in standby mode, the fume sensor can be run intermittently or continuously to detect the concentration of fumes in the environment where the range hood is located and record it as a real-time concentration value so that the range hood can be automatically started. Alternatively, when the range hood is in working mode, the fume sensor can be run continuously to detect the concentration of fumes in the environment where the range hood is located and record it as a real-time concentration value.

[0101] Step 102: Set multiple speeds for the fan used to remove cooking fumes.

[0102] Range hoods contain fans, and based on the type of fan, they can be divided into two types: axial flow and centrifugal. Axial flow fans are generally equipped with shallow hoods, have a large air volume but low air pressure; centrifugal fans have high air pressure.

[0103] When the fan starts, a negative pressure zone is formed in the surrounding environment, and external air is supplied to the inside of the air duct, thereby removing the oil fumes from the air.

[0104] In this embodiment, multiple speed settings can be set for the fan, each speed setting representing the power of the fan. Generally, the higher the speed setting, the greater the power of the fan, the stronger its ability to remove oil fumes, and the louder the noise. Conversely, the lower the speed setting, the lower the power of the fan, the weaker its ability to remove oil fumes, and the quieter the noise.

[0105] Each setting of the fan can be mapped to a suitable original concentration range. The original concentration range is the range set for the concentration value of oil fumes. The mapping relationship between the setting and the original concentration range means that when the concentration value of oil fumes is within the original concentration range, it is appropriate to set the fan to that setting. This ensures that the fan can remove oil fumes while operating at the lowest power, thereby minimizing power consumption and noise.

[0106] Generally, since the gears are continuous, the original concentration range is also continuous. That is, the original concentration range mapped by the previous gear and the original concentration range mapped by the next gear are consecutive.

[0107] In one embodiment of the present invention, step 102 may include the following steps:

[0108] Step 1021: Query the maximum concentration of oil fumes in the environment where the range hood is located, as detected by the oil fume sensor.

[0109] In this embodiment, the fume sensor can continuously detect the concentration of fumes generated by the range hood in its environment during use, and filter the maximum value from all concentration values, recording it as the maximum concentration value. The maximum concentration value can be stored in the range hood or a server. When setting the range hood, the maximum concentration value of fumes can be read locally or requested from the server.

[0110] The fume sensor continuously monitors the concentration of fumes generated by the range hood in its environment during use. This operation can be performed in a simulated laboratory environment, where the maximum fume concentration represents the maximum concentration of fumes generated during cooking in a general environment. Alternatively, this operation can be performed in the actual environment after the range hood is installed and activated, and the maximum concentration value can be continuously updated, where the maximum fume concentration represents the maximum concentration of fumes generated during personalized cooking by the user, and so on. This embodiment does not impose any limitations on this.

[0111] Step 1022: Set the range from zero to the maximum concentration value as the concentration range.

[0112] In this embodiment, zero (0) is taken as the starting point and the maximum concentration value is taken as the ending point. The range between the starting point and the ending point can be set as the concentration range, which characterizes the ability of the oil fume sensor to detect and remove oil fumes.

[0113] Step 1023: Configure multiple speed settings for the fan used to remove oil fumes.

[0114] In this embodiment, based on the performance of the fan used to remove cooking fumes, the fan can be configured with multiple speed settings. Each speed setting allows the fan to adjust its output power to achieve a corresponding ability to remove cooking fumes.

[0115] Step 1024: Divide the concentration range into multiple original concentration ranges according to the multiple levels.

[0116] Step 1025: Establish mapping relationships between multiple gear levels and multiple original concentration ranges respectively.

[0117] In this embodiment, the concentration range can be divided into multiple original concentration ranges in a linear, nonlinear or other manner, so that the levels are matched with the original concentration ranges, and a mapping relationship is established between each level and the corresponding original concentration range.

[0118] Taking linear concentration as an example, the number of multiple levels can be counted, the ratio between the maximum concentration value and the number of multiple levels can be calculated, and this ratio can be used as the step size to divide an original concentration range at intervals of this ratio within the concentration range.

[0119] Let the maximum concentration be T. maxIf the number of gears is n, then the concentration range is [0, T]. max The original concentration ranges were [0, T]. max / n), [T max / n, 2T max / n), ..., [(n-1)T max / n,T max The established mapping relationship is as follows:

[0120] Gear 1 - [0, T] max / n);

[0121] Gear 2 - [T] max / n, 2T max / n);

[0122] ...;

[0123] gear n——[(n-1)T max / n,T max ].

[0124] Step 103: Adjust the original concentration range to a candidate concentration range that matches the degree of contamination of the oil fume sensor.

[0125] In practical applications, users mainly cook in the environment around the range hood, which usually produces a lot of oil fumes. Therefore, the surrounding environment of the range hood is heavily polluted with oil fumes, and contains a large amount of oil fumes during long operating hours. Oil fumes are usually particulate, with a particle size ranging from 0.1 micrometers to 10 micrometers. They are characterized by small particle size and strong adhesion. Oil fumes (particles) easily adhere to the surface of oil fume sensors (such as the probes on the transmitter and receiver of photoelectric oil fume sensors), causing the oil fume sensors (such as the probes on the transmitter and receiver of photoelectric oil fume sensors) to be contaminated by oil fumes. This affects the normal operation of the oil fume sensors (such as affecting the transmission and reception of light beams by photoelectric oil fume sensors), thus reducing the detection accuracy of the oil fume sensors.

[0126] In this embodiment, the degree of contamination of the fume sensor can be estimated under conditions such as at regular intervals, and the original concentration range can be compensated according to the degree of contamination of the fume sensor to adjust it to a candidate concentration range that matches the degree of contamination of the fume sensor.

[0127] In one embodiment of the present invention, step 103 may include the following steps:

[0128] Step 1031: Generate a compensation concentration value according to the degree of contamination of the oil fume sensor.

[0129] In this embodiment, the degree of contamination of the fume sensor can be estimated, and a concentration value of the fume used for compensation can be generated for the original concentration range based on the degree of contamination of the fume sensor, which is recorded as the compensation concentration value.

[0130] For example, on the one hand, the concentration value of oil fumes detected by the oil fume sensor in the environment under the conditions of no cooking (i.e., theoretically no oil fumes in the environment where the range hood is located) and no contamination of the oil fume sensor is recorded as the baseline concentration value. At this time, the baseline concentration value represents the noise floor of the oil fume sensor.

[0131] On the other hand, the concentration value of oil fumes detected by the oil fume sensor in the environment under the condition that there is no cooking (that is, theoretically there is no oil fume in the environment where the range hood is located) and the oil fume sensor is already contaminated is recorded as the deviation concentration value. At this time, the deviation concentration value represents the background noise of the oil fume sensor and the impact of the contamination on the oil fume sensor.

[0132] Subtracting the baseline oil fume value from the deviation oil fume value yields the compensation concentration value (i.e., the difference between the deviation oil fume value and the baseline oil fume value). At this point, the compensation concentration value represents the impact of the pollution on the oil fume sensor.

[0133] In this example, the compensation concentration value is expressed as: ΔT=T1-T0, where ΔT is the compensation concentration value, T1 is the deviation oil fume value, and T0 is the reference oil fume value.

[0134] Step 1032: Add compensation oil fume values ​​to the upper and / or lower limits of the original concentration range to obtain a candidate concentration range that matches the degree of contamination of the oil fume sensor.

[0135] The original concentration range has two endpoints, namely the upper limit and the lower limit. By adding a compensation oil fume value to the upper limit and / or lower limit of the original concentration range, a candidate concentration range that matches the degree of contamination of the oil fume sensor can be obtained.

[0136] Under normal circumstances, the concentration range of the fume sensor will not change. Therefore, when the starting point of the concentration range (i.e., 0) is used as the lower limit and the ending point of the concentration range (i.e., the maximum concentration value) is used as the upper limit, a compensation value for fume can be added or not. This embodiment does not impose any restrictions on this.

[0137] For example, the mapping relationship between the gear level and the original concentration range is as follows:

[0138] Gear 1 - [0, T] max / n);

[0139] Gear 2 - [T] max / n, 2T max / n);

[0140] ...;

[0141] Gear position n——[(n-1)Tmax / n, Tmax].

[0142] Let the compensation value for cooking fumes be ΔT, then the candidate concentration range is as follows:

[0143] Gear 1 - [0, T] max / n+ΔT);

[0144] Gear 2 - [T] max / n+ΔT,2T max / n+ΔT);

[0145] ...;

[0146] Gear position n——[(n-1)Tmax / n+ΔT,Tmax].

[0147] Step 104: Adjust the fan speed according to the relationship between the real-time concentration value and the candidate concentration range.

[0148] Since cooking is a dynamic process, the amount of oil fumes generated during this process fluctuates. Therefore, the real-time concentration value of the oil fumes is a fluctuating data. By comparing the real-time concentration value with the candidate concentration range, if the real-time concentration value changes and causes a mismatch with the candidate concentration range, the fan speed can be adjusted to keep the fan power suitable for the oil fumes.

[0149] In one embodiment of the present invention, step 104 may include the following steps:

[0150] Step 1041: Determine the candidate concentration range corresponding to the current speed of the fan, and use it as the target concentration range.

[0151] The system queries the local cache to find the current speed of the fan. To facilitate differentiation, the candidate concentration range corresponding to the speed is marked as the target concentration range. The real-time concentration value of the oil fume is then compared with the upper and lower limits of the target concentration range.

[0152] Step 1042: If the real-time oil fume value is greater than the upper limit of the target concentration range, then verify the real-time oil fume value being greater than the upper limit of the target concentration range under stability conditions.

[0153] Step 1043: If the real-time oil fume value is greater than the upper limit of the target concentration range and the verification is successful, then the fan speed is increased.

[0154] In practical applications, the real-time concentration of cooking fumes may fluctuate between the upper and lower limits of the candidate concentration range. If the detected real-time concentration of cooking fumes exceeds the upper limit of the target concentration range, the fan speed will be switched. In this case, frequent switching of the fan speed may occur in a short period of time, increasing the wear and tear on the fan and making users mistakenly believe that the fan has malfunctioned, resulting in a poor user experience.

[0155] Therefore, in this embodiment, when the real-time oil fume value is detected to be greater than the upper limit of the target concentration range for the first time, the phenomenon of the real-time oil fume value being greater than the upper limit of the target concentration range is verified in terms of stability. If the verification of the real-time oil fume value being greater than the upper limit of the target concentration range passes, it means that the real-time oil fume value being greater than the upper limit of the target concentration range is a stable phenomenon. Then, the fan speed is increased to enhance the output power of the fan and remove as much oil fume as possible.

[0156] For example, after the first detection that the real-time oil fume value is greater than the upper limit of the target concentration range, multiple real-time concentration values ​​collected within a preset time period in the future can be obtained as a first concentration sequence. For example, within the next 1 second (time period), one real-time concentration value is collected every 100 milliseconds, and the multiple real-time concentration values ​​are sorted according to their numerical values ​​to form the first concentration sequence.

[0157] Removing the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the first concentration sequence, and removing the real-time concentration values ​​at the head and / or tail of the first concentration sequence, can reduce the randomness of real-time concentration value fluctuations and improve the accuracy of detection stability. Here, n and m are both positive integers, and n and m can be the same or different. For example, n and m can both be 1.

[0158] If the removal is complete, the average value of the remaining real-time concentration values ​​in the first concentration sequence pool is calculated as the first average concentration value, and the first average concentration value is compared with the upper limit of the target concentration range again.

[0159] If the first average concentration value is greater than the upper limit of the target concentration range, it means that the overall trend of the real-time oil fume value is greater than the upper limit of the target concentration range in the time period after the first detection that the real-time oil fume value is greater than the upper limit of the target concentration range. Then it can be determined that the real-time oil fume value is greater than the upper limit of the target concentration range and passes the verification.

[0160] If the first average concentration value is less than or equal to the upper limit of the target concentration range, it means that the overall trend of the real-time oil fume value is that the real-time oil fume value fluctuates within a certain period of time after the first detection that the real-time oil fume value is greater than the upper limit of the target concentration range. Therefore, it can be determined that the real-time oil fume value is greater than the upper limit of the target concentration range and has failed the verification.

[0161] Step 1044: If the real-time oil fume value is less than the lower limit of the target concentration range, then verify the real-time oil fume value being less than the lower limit of the target concentration range under stability conditions.

[0162] Step 1045: If the real-time oil fume value is less than the lower limit of the target concentration range and the verification is passed, then the fan speed is lowered.

[0163] In practical applications, the real-time concentration of cooking fumes may fluctuate between the upper and lower limits of the candidate concentration range. If the detected real-time concentration of cooking fumes is less than the lower limit of the target concentration range, the fan speed will be switched. In this case, frequent switching of the fan speed may occur in a short period of time, increasing the wear and tear on the fan and making users mistakenly believe that the fan has malfunctioned, resulting in a poor user experience.

[0164] Therefore, in this embodiment, when the real-time oil fume value is detected to be lower than the lower limit of the target concentration range for the first time, the phenomenon of the real-time oil fume value being lower than the lower limit of the target concentration range is verified in terms of stability. If the verification of the real-time oil fume value being lower than the lower limit of the target concentration range passes, it means that the real-time oil fume value being lower than the lower limit of the target concentration range is a stable phenomenon. Then, the fan speed is reduced to decrease the output power of the fan, thereby reducing power consumption and noise.

[0165] For example, after the first detection that the real-time oil fume value is less than the lower limit of the target concentration range, multiple real-time concentration values ​​collected within a preset time period in the future can be obtained as a second concentration sequence. For example, within the next 1 second (time period), one real-time concentration value is collected every 100 milliseconds, and the multiple real-time concentration values ​​are sorted according to their numerical values ​​to form a second concentration sequence.

[0166] Removing the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the second concentration sequence, as well as removing the real-time concentration values ​​at the beginning and / or end of the second concentration sequence, can reduce the randomness of real-time concentration value fluctuations and improve the accuracy of detection stability. Here, n and m are both positive integers, and n and m can be the same or different. For example, n and m can both be 1.

[0167] If the removal is complete, the average value of the remaining real-time concentration values ​​in the second concentration sequence pool is calculated as the second average concentration value, and the second average concentration value is compared again with the lower limit of the target concentration range.

[0168] If the second average concentration value is less than the lower limit of the target concentration range, it means that the overall trend of the real-time oil fume value in the time period after the first detection that the real-time oil fume value is less than the lower limit of the target concentration range is that the real-time oil fume value is less than the lower limit of the target concentration range. Then it can be determined that the real-time oil fume value is less than the lower limit of the target concentration range and passes the verification.

[0169] If the second average concentration value is greater than or equal to the lower limit of the target concentration range, it means that the overall trend of the real-time oil fume value is that the real-time oil fume value fluctuates within a certain period of time after the first detection that the real-time oil fume value is less than the lower limit of the target concentration range. Therefore, it can be determined that the real-time oil fume value has failed the verification because it is less than the lower limit of the target concentration range.

[0170] In this embodiment, a fume sensor is used to detect the real-time concentration of cooking fumes in the environment where the range hood is located. Multiple speed settings are configured for the fan used to remove the fumes, each mapping to an original concentration range. The original concentration range is adjusted to a candidate concentration range that matches the degree of contamination of the fume sensor. The fan speed is adjusted based on the relationship between the real-time concentration value and the candidate concentration range. This embodiment compensates for the original concentration range mapped to the speed settings based on the degree of contamination of the fume sensor, correcting the deviation between the real-time concentration value detected by the fume sensor and the actual concentration value of the fumes when contaminated. This improves the accuracy of the detected fume concentration value, thereby ensuring that the fan speed matches the actual concentration value of the fumes, saving energy and reducing noise while effectively removing the fumes.

[0171] Example 2

[0172] Figure 2 This is a schematic diagram of the control device for a range hood provided in Embodiment 2 of the present invention. Figure 2 As shown, the device includes:

[0173] The real-time concentration value detection module 201 is used to call the oil fume sensor to detect the real-time concentration value of oil fumes in the environment where the range hood is located;

[0174] The gear setting module 202 is used to set multiple gears for the fan used to remove the oil fumes, and each gear is mapped to the original concentration range;

[0175] The concentration range adjustment module 203 is used to adjust the original concentration range to a candidate concentration range that is compatible with the degree of contamination of the oil fume sensor.

[0176] The gear adjustment module 204 is used to adjust the gear of the fan according to the relationship between the real-time concentration value and the candidate concentration range.

[0177] In one embodiment of the present invention, the gear setting module 202 includes:

[0178] The maximum concentration value query module is used to query the maximum concentration value of oil fumes detected by the oil fume sensor in the environment where the range hood is located.

[0179] A concentration range setting module is used to set the concentration range from zero to the maximum concentration value;

[0180] The gear configuration module is used to configure multiple gears for the fan used to remove the oil fumes;

[0181] The original concentration range division module is used to divide the concentration range into multiple original concentration ranges according to the multiple gear positions;

[0182] The mapping relationship establishment module is used to establish mapping relationships between the multiple gear levels and the multiple original concentration ranges respectively.

[0183] In one embodiment of the present invention, the original concentration range division module includes:

[0184] The ratio calculation module is used to calculate the ratio between the maximum concentration value and the number of multiple gear levels;

[0185] The ratio division module is used to divide the concentration range into an original concentration range at intervals of the ratio value.

[0186] In one embodiment of the present invention, the concentration range adjustment module 203 includes:

[0187] The compensation concentration value generation module is used to generate a compensation concentration value according to the degree of contamination of the oil fume sensor;

[0188] The compensation concentration value addition module is used to add the compensation oil fume value to the upper limit and / or lower limit of the original concentration range to obtain a candidate concentration range that matches the degree of contamination of the oil fume sensor.

[0189] In one embodiment of the present invention, the compensation concentration value generation module includes:

[0190] The baseline concentration value query module is used to query the baseline concentration value of oil fumes detected in the environment by the oil fume sensor under the conditions of no cooking and no contamination of the oil fume sensor;

[0191] The deviation concentration value query module is used to query the deviation concentration value of oil fumes detected by the oil fume sensor in the environment under the condition that cooking has not been carried out and the oil fume sensor has been contaminated.

[0192] The concentration value subtraction module is used to subtract the reference oil fume value from the deviation oil fume value to obtain the compensation concentration value.

[0193] In one embodiment of the present invention, the gear adjustment module 204 includes:

[0194] The target concentration range determination module is used to determine the candidate concentration range corresponding to the current gear position of the fan, as the target concentration range;

[0195] The upper-level verification module is used to verify that the real-time oil fume value is greater than the upper limit of the target concentration range if the real-time oil fume value is greater than the upper limit of the target concentration range under stability conditions.

[0196] The gear adjustment module is used to adjust the gear of the fan if the real-time oil fume value is greater than the upper limit of the target concentration range and the verification is passed.

[0197] The down-adjustment verification module is used to verify that the real-time oil fume value is less than the lower limit of the target concentration range under stability conditions if the real-time oil fume value is less than the lower limit of the target concentration range.

[0198] The gear reduction module is used to reduce the gear of the fan if the real-time oil fume value is less than the lower limit of the target concentration range and the verification is passed.

[0199] In one embodiment of the present invention, the up-checking module includes:

[0200] The first concentration sequence acquisition module is used to acquire multiple real-time concentration values ​​collected within a preset time period in the future, as the first concentration sequence;

[0201] The first real-time concentration value removal module is used to remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the first concentration sequence.

[0202] The first average concentration value calculation module is used to calculate the average value of the remaining real-time concentration values ​​in the first concentration sequence pool if the removal is completed, and use it as the first average concentration value.

[0203] The up-adjustment verification module is used to determine that the real-time oil fume value is greater than the upper limit of the target concentration range if the first average concentration value is greater than the upper limit of the target concentration range, thus passing the verification.

[0204] In one embodiment of the present invention, the down-adjustment verification module includes:

[0205] The second concentration sequence acquisition module is used to acquire multiple real-time concentration values ​​collected within a preset time period in the future, as a second concentration sequence;

[0206] The second real-time concentration value removal module is used to remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the second concentration sequence.

[0207] The second average concentration value calculation module is used to calculate the average value of the remaining real-time concentration values ​​in the second concentration sequence pool if the removal is completed, and use it as the second average concentration value.

[0208] The down-adjustment verification module is used to determine that the real-time oil fume value is less than the lower limit of the target concentration range if the second average concentration value is less than the lower limit of the target concentration range.

[0209] The control device for the range hood provided in the embodiments of the present invention can execute the control method for the range hood provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the control method for the range hood.

[0210] Example 3

[0211] Figure 3 A schematic diagram of a range hood 10, which can be used to implement embodiments of the present invention, is shown. The range hood is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workbenches, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The range hood can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0212] like Figure 3 As shown, the range hood 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer programs stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the range hood 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0213] Multiple components in the range hood 10 are connected to the I / O interface 15, including: an input unit 16, such as a keyboard, mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a disk, optical disk, etc.; and a communication unit 19, such as a network card, modem, wireless transceiver, etc. The communication unit 19 allows the range hood 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0214] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the control methods of a range hood.

[0215] In some embodiments, the control method for the range hood may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded into and / or installed onto the range hood 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the control method for the range hood described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the control method for the range hood by any other suitable means (e.g., by means of firmware).

[0216] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0217] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0218] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0219] To provide user interaction, the systems and techniques described herein can be implemented on a range hood that includes: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the range hood. Other types of devices can also be used to provide user interaction; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0220] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or computing systems that include middleware components (e.g., application servers), or computing systems that include frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0221] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0222] Example 4

[0223] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the control method for a range hood as provided in any embodiment of this invention.

[0224] In implementing the computer program product, computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof. Programming languages ​​include object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as C or similar languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0225] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0226] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A control method for a range hood, characterized in that, include: The fume sensor is invoked to detect the real-time concentration of oil fumes in the environment where the range hood is located; The fan used to remove the fumes is equipped with multiple speed settings, each of which maps to the original concentration range; The original concentration range is adjusted to a candidate concentration range that matches the degree of contamination of the oil fume sensor; The fan speed is adjusted based on the relationship between the real-time concentration value and the candidate concentration range; The step of adjusting the original concentration range to a candidate concentration range that matches the degree of contamination of the oil fume sensor includes: A compensation concentration value is generated based on the degree of contamination of the oil fume sensor. The compensation concentration value is added to the upper and / or lower limits of the original concentration range to obtain a candidate concentration range that matches the degree of contamination of the oil fume sensor. The step of adjusting the fan speed based on the relationship between the real-time concentration value and the candidate concentration range includes: The candidate concentration range corresponding to the current gear position of the fan is determined as the target concentration range; If the real-time oil fume value is greater than the upper limit of the target concentration range, then the real-time oil fume value being greater than the upper limit of the target concentration range is verified under stability conditions. If the real-time oil fume value is greater than the upper limit of the target concentration range and the verification is passed, then the speed of the fan is increased. If the real-time oil fume value is less than the lower limit of the target concentration range, then the stability test is performed to verify that the real-time oil fume value is less than the lower limit of the target concentration range. If the real-time oil fume value is less than the lower limit of the target concentration range and passes the verification, then the fan speed is lowered.

2. The method according to claim 1, characterized in that, The fan used to remove the oil fumes is equipped with multiple speed settings, including: The maximum concentration of cooking fumes detected by the fume sensor in the environment where the range hood is located is queried. The range from zero to the maximum concentration value is defined as the concentration range; The fan used to remove the oil fumes is equipped with multiple speed settings; The concentration range is divided into multiple original concentration ranges according to the multiple gear positions; A mapping relationship is established between the multiple gear levels and the multiple original concentration ranges.

3. The method according to claim 2, characterized in that, The step of dividing the concentration range into multiple original concentration ranges according to multiple gear levels includes: Calculate the ratio between the maximum concentration value and the number of the multiple concentration levels; Within the concentration range, each interval of the ratio is used to divide an initial concentration range.

4. The method according to claim 1, characterized in that, The process of generating a compensation concentration value based on the degree of contamination of the oil fume sensor includes: The baseline concentration value of cooking fumes detected by the fume sensor in the environment is queried under conditions where cooking is not taking place and the fume sensor is not contaminated. The deviation concentration value of oil fumes detected by the oil fume sensor in the environment is queried under conditions where cooking is not taking place and the oil fume sensor is already contaminated. The compensation concentration value is obtained by subtracting the reference concentration value from the deviation concentration value.

5. The method according to claim 1, characterized in that, The step of verifying the real-time oil fume value to be greater than the upper limit of the target concentration range under stability conditions includes: Multiple real-time concentration values ​​collected within a preset time period in the future are obtained as a first concentration sequence; Remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the first concentration sequence; If the removal is complete, the average value of the remaining real-time concentration values ​​in the first concentration sequence pool is calculated as the first average concentration value. If the first average concentration value is greater than the upper limit of the target concentration range, then the real-time oil fume value is determined to be greater than the upper limit of the target concentration range, thus passing the verification.

6. The method according to claim 1, characterized in that, The step of verifying that the real-time oil fume value is less than the lower limit of the target concentration range under stability conditions includes: Multiple real-time concentration values ​​collected within a preset time period in the future are obtained as a second concentration sequence; Remove the n largest real-time concentration values ​​and / or the m smallest real-time concentration values ​​from the second concentration sequence; If the removal is complete, the average value of the remaining real-time concentration values ​​in the second concentration sequence pool is calculated as the second average concentration value; If the second average concentration value is less than the lower limit of the target concentration range, then the real-time oil fume value is determined to be less than the lower limit of the target concentration range, thus passing the verification.

7. A control device for a range hood, characterized in that, include: The real-time concentration detection module is used to call the oil fume sensor to detect the real-time concentration of oil fumes in the environment where the range hood is located; The gear setting module is used to set multiple gears for the fan used to remove the oil fumes, and each gear is mapped to the original concentration range; A concentration range adjustment module is used to adjust the original concentration range to a candidate concentration range that matches the degree of contamination of the oil fume sensor; The gear adjustment module is used to adjust the gear position of the fan according to the relationship between the real-time concentration value and the candidate concentration range; The concentration range adjustment module includes: The compensation concentration value generation module is used to generate a compensation concentration value according to the degree of contamination of the oil fume sensor; The compensation concentration value addition module is used to add the compensation concentration value to the upper limit and / or lower limit of the original concentration range to obtain a candidate concentration range that matches the degree of contamination of the oil fume sensor. The gear adjustment module includes: The target concentration range determination module is used to determine the candidate concentration range corresponding to the current gear position of the fan, as the target concentration range; The upper-level verification module is used to verify that the real-time oil fume value is greater than the upper limit of the target concentration range if the real-time oil fume value is greater than the upper limit of the target concentration range under stability conditions. The gear adjustment module is used to adjust the gear of the fan if the real-time oil fume value is greater than the upper limit of the target concentration range and the verification is passed. The down-adjustment verification module is used to verify that the real-time oil fume value is less than the lower limit of the target concentration range under stability conditions if the real-time oil fume value is less than the lower limit of the target concentration range. The gear reduction module is used to reduce the gear of the fan if the real-time oil fume value is less than the lower limit of the target concentration range and the verification is passed.

8. A range hood, characterized in that, The range hood includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the control method of the range hood according to any one of claims 1-6.

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