Air purifier and control method, device and storage medium thereof

Abstract

The application belongs to the field of air purification, and proposes an air purifier, a control method and device thereof, and a storage medium. The method comprises the following steps: determining a purification speed of the air purifier, and determining a standard deviation of air quality corresponding to the purification speed; determining a target air quality of the air purifier according to the purification speed and the standard deviation corresponding to the purification speed; and controlling a working state of the air purifier according to the target air quality and the purification speed of the air purifier. The target air quality is quickly determined based on the purification speed and the standard deviation of air quality, which is beneficial to guarantee the purification effect after the air purifier is operated, and to reduce the inefficient operation time in a high gear, which is beneficial to save electric energy.

Description

Technical Field

[0001] This application relates to the field of air purification, and more particularly to an air purifier and its control method, device and storage medium. Background Technology

[0002] An air purifier, also known as an air cleaner, air freshener, or purifier, is a product that can adsorb, decompose, or transform air pollutants to improve air cleanliness. Air purifiers can improve indoor air quality and enhance people's living comfort.

[0003] During air purifier operation, in order to quickly purify the air, it is usually run at a high setting for a fixed period of time, followed by continuous operation at a low setting. It is possible that after running at the high setting, the air quality has not reached the predetermined optimization requirements, which is detrimental to ensuring the purification effect of the air purifier after operation. Alternatively, if the predetermined optimization requirements have been reached during high-setting operation, continuing to run at the high setting is not conducive to saving energy. Summary of the Invention

[0004] In view of this, embodiments of this application provide an air purifier and its control method, device and storage medium to solve the problem that existing air purifiers are not conducive to ensuring the purification effect after operation or to saving energy.

[0005] A first aspect of this application provides a method for controlling an air purifier, the method comprising:

[0006] Determine the purification speed of the air purifier, and determine the standard deviation of the air quality corresponding to the purification speed;

[0007] The target air quality of the air purifier is determined based on the purification speed and the standard deviation corresponding to the purification speed.

[0008] The operating status of the air purifier is controlled based on the target air quality and the purification speed of the air purifier.

[0009] In conjunction with the first aspect, in a first possible implementation of the first aspect, determining the purification speed of the air purifier includes:

[0010] Determine the real-time air quality, the size of the space where the air purifier is located, and the airflow of the air purifier;

[0011] A first product is obtained based on the real-time air quality and the airflow of the air purifier, and the purification speed of the air purifier is determined based on the ratio of the first product to the size of the space to be purified.

[0012] In conjunction with the first possible implementation of the first aspect, in the second possible implementation of the first aspect, determining the purification speed of the air purifier includes:

[0013] Determine the real-time air quality, the size of the space where the air purifier is located, the air exchange rate of the space to be purified, and the air volume of the air purifier;

[0014] A first product is obtained based on the real-time air quality and the airflow of the air purifier. A first difference is determined based on a preset value and the air exchange rate of the space to be purified. A second product is determined based on the first product and the first difference. The purification speed of the air purifier is determined based on the second product and the size of the space to be purified.

[0015] In conjunction with the first possible implementation of the first aspect, in the third possible implementation of the first aspect, determining the standard deviation of the air quality corresponding to the purification speed includes:

[0016] During the duration of the purification speed, multiple air quality measurements are obtained at predetermined first time intervals.

[0017] The standard deviation of the air quality corresponding to the purification speed is obtained based on the multiple air quality values.

[0018] In conjunction with the first aspect, in a fourth possible implementation of the first aspect, determining the target air quality of the air purifier based on the purification speed and the standard deviation corresponding to the purification speed includes:

[0019] The target air quality of the air purifier is determined by the ratio of the purification speed to the standard deviation corresponding to the purification speed.

[0020] In conjunction with the first aspect, in a fifth possible implementation of the first aspect, controlling the operating state of the air purifier based on the target air quality and the purification speed of the air purifier includes:

[0021] The purification time of the air purifier is determined based on the target air quality and the purification speed of the air purifier.

[0022] The working status of the air purifier is controlled according to the purification time.

[0023] 8. In conjunction with the fifth possible implementation of the first aspect, in the sixth possible implementation of the first aspect, determining the purification duration of the air purifier based on the target air quality and the purification speed of the air purifier includes:

[0024] Obtain the first air quality at the first moment and calculate the first purification speed at the first moment;

[0025] The second air quality at the second moment is inferred based on the first purification speed and the first air quality.

[0026] When the second air quality is greater than the target air quality, the second purification speed is calculated based on the second air quality, and the third air quality at the third moment is obtained based on the second purification speed. This process continues until the calculated Nth air quality at the Nth moment is less than or equal to the target air quality, or the Nth purification speed at the Nth moment is less than a predetermined speed threshold. The purification time of the air purifier is then obtained, where the time interval between two adjacent moments is equal, and N is a natural number greater than or equal to 2.

[0027] A second aspect of this application provides a control device for an air purifier, the device comprising:

[0028] The data acquisition and determination unit is used to determine the purification speed of the air purifier and the standard deviation of the air quality corresponding to the purification speed.

[0029] A target air quality determination unit is used to determine the target air quality of the air purifier based on the purification speed and the standard deviation corresponding to the purification speed.

[0030] The purification control unit is used to control the operating status of the air purifier based on the target air quality and the purification speed of the air purifier.

[0031] A third aspect of this application provides an air purifier, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the steps of the method as described in any of the first aspects.

[0032] A fourth aspect of this application provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the method as described in any of the first aspects.

[0033] The beneficial effects of this application embodiment compared with the prior art are as follows: This application determines the purification speed of the air purifier and the standard deviation of the air quality corresponding to the purification speed, quickly determines the target air quality of the air purifier based on the purification speed and the standard deviation, and controls the purification of the air purifier based on the target air quality and the purification speed. This enables the air purifier to more reliably purify the air to the target air quality, which helps to ensure the purification effect after the air purifier is running. Furthermore, when purifying based on the target air quality, it can reduce the inefficient operating time of the air purifier at high speed, which helps to save energy. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0035] Figure 1 This is a schematic diagram illustrating the implementation process of a control method for an air purifier provided in an embodiment of this application;

[0036] Figure 2 This is a schematic diagram illustrating the implementation process of a method for estimating purification duration provided in an embodiment of this application;

[0037] Figure 3 This is a schematic diagram illustrating the implementation process of a control method for an air purifier provided in an embodiment of this application;

[0038] Figure 4 This is a schematic diagram of a control device for an air purifier provided in an embodiment of this application;

[0039] Figure 5 This is a schematic diagram of an air purifier provided in an embodiment of this application. Detailed Implementation

[0040] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0041] To illustrate the technical solution described in this application, specific embodiments are provided below.

[0042] Air purifiers typically operate at a high speed to quickly purify the air. Once the air quality meets the desired level, the purifier can switch to a lower speed or turn off. The duration of high-speed operation is usually set by the user to a fixed duration, or a recommended duration is suggested based on general purification experience. However, due to variations in actual usage scenarios, the air purifier may not achieve the desired purification effect after operation, or it may continue operating at a high speed even after the desired purification level has been reached, which is not energy-efficient.

[0043] Based on this, embodiments of this application propose a control method for an air purifier, such as... Figure 1 As shown, the method includes:

[0044] In S101, the purification speed of the air purifier is determined, and the standard deviation of the air quality corresponding to the purification speed is determined.

[0045] The purification speed in this embodiment refers to the rate of change in air quality per unit time. For example, during air purifier operation, if the air quality (represented by PM2.5 concentration) decreases from 1000 to 750 after one minute of purification, the purification speed is 250 PM2.5 / minute. It's reasonable to assume that as the PM2.5 concentration decreases, the air quality improves, the concentration of pollutants in the air decreases, and the purification speed slows down. In other words, the purification speed of an air purifier is not a constant value and varies with factors such as the size of the space to be purified, the airflow of the purifier, and the real-time air quality.

[0046] The purification speed of an air purifier is inversely proportional to the size of the space to be purified, directly proportional to the real-time air quality, and directly proportional to the ventilation volume. That is, the smaller the space to be purified, the faster the purification speed; the higher the air quality, the faster the purification speed; and the higher the ventilation volume, the faster the purification speed. Therefore, in a possible calculation method, a first product can be obtained based on the real-time air quality and the air purifier's airflow, and the purification speed can be determined by the ratio of this first product to the size of the space to be purified.

[0047] For example, the real-time PM2.5 concentration is Q, with units of μg / m3; the airflow of an air purifier is F or F', where F is in m3 / h and F' is in m3 / min; and the size of the space to be purified is V, with units of m. 3 Let k be the purification speed of an air purifier, with units of μg / (m^3·h) or μg / (m^3·min). Then, the purification speed of an air purifier can be expressed as:

[0048]

[0049] To verify the error of the purification rate calculation method, the following test was conducted in a 30-square-meter experimental chamber. The initial air mass of the experimental chamber was PM2.5 = 1000. The air mass was estimated using the above formula and compared with the actual measured air mass, resulting in the following comparison table:

[0050] Test time PM2.5 Predicted purification rate k Estimate PM2.5 levels every minute. PM2.5 error per minute 16:18:51 1000 355 16:19:51 710 228.975 645 -0.0915493 16:20:51 490 147.688875 416.025 -0.1509694 16:21:51 333 95.25932438 268.336125 -0.1941858 16:22:51 227 61.44226422 173.076801 -0.2375471 16:23:51 153 39.63026042 111.634536 -0.2703625 16:24:51 106 25.56151797 72.004276 -0.3207144 16:25:51 71 16.48717909 46.442758 -0.3458766 16:26:51 49 10.63423051 29.9555789 -0.3886617 16:27:51 33 6.859078682 19.3213484 -0.4145046 16:28:51 22 4.42410575 12.4622697 -0.4335332 16:29:51 16 2.853548209 8.03816397 -0.4976148 16:30:51 10 1.840538595 5.18461576 -0.4815384 16:31:51 7 1.187147394 3.34407716 -0.5222747 16:32:51 4 0.765710069 2.15692977 -0.4607676 16:33:51 3 0.493882994 1.3912197 -0.5362601 16:34:35 2 0.318554531 0.89733671 -0.5513316

[0051] Analysis of the test data showed that the actual time taken for the air quality to purify from PM2.5 = 1000 to PM2.5 = 2 was 15 minutes and 44 seconds, while the predicted purification time was 15 minutes. The error was (0:15:0 ​​- 0:15:44) ÷ (0:15:44) = -0.04661, which is relatively small. It is understandable that to further reduce the error, the predetermined time could be reduced, i.e., the duration of action corresponding to the purification speed could be shortened, thereby further improving the accuracy of the predicted air quality.

[0052] When the PM2.5 concentration in the space to be purified is 333, the test data and predicted data are shown in the table below:

[0053]

[0054]

[0055] Test data shows that the actual time to purify PM2.5 from 333 to 2 was 12 minutes and 44 seconds, while the predicted purification time was 12 minutes. The error is (0:12:0-0:12:44)÷(0:12:44)=-0.05759.

[0056] When the PM2.5 concentration in the space to be purified was 49, the test data and the predicted data are shown in the table below:

[0057] Test time PM2.5 Predicted purification rate k Estimate PM2.5 levels every minute. PM2.5 error per minute 16:26:51 49 17.395 16:27:51 33 11.21978 31.605 -0.04227 16:28:51 22 7.236755 20.38523 -0.0734 16:29:51 16 4.667707 13.14847 -0.17822 16:30:51 10 3.010671 8.480763 -0.15192 16:31:51 7 1.941883 5.470092 -0.21856 16:32:51 4 1.252514 3.52821 -0.11795 16:33:51 3 0.807872 2.275695 -0.24143 16:34:35 2 0.521077 1.467823 -0.26609

[0058] Test data shows that the actual time taken to purify PM2.5 from 333 to 2 was 7 minutes and 44 seconds. According to the predicted data in the table, the predicted purification time is 8 minutes, with a small error of (0:8:0 - 0:7:44) ÷ (0:7:44) = 0.034483.

[0059] In some implementations, the space being purified by the air purifier may be an open space or a space where ventilation is possible. Different ventilation rates in the space will affect the purification speed of the air purifier. A higher ventilation rate results in a slower purification speed.

[0060] Air exchange rate is used to express the proportion of air exchanged in a space to be purified per unit of time. For example, in a typical household, the air exchange frequency of a room is 0.35-1 times per hour, corresponding to an air exchange rate of 0.35 / 60-1 / 60 per minute. In an office, the air exchange rate is 2-3 times per hour, corresponding to an air exchange rate of 2 / 60-3 / 60 per minute.

[0061] The change in air exchange rate can include any value between 0 and 1. When the space to be purified is a closed space, the air exchange rate is close to 0.

[0062] When calculating the purification speed of an open space, a first product can be obtained based on the real-time air quality and the airflow of the air purifier. A first difference is determined based on a preset value and the air exchange rate of the space to be purified. A second product is determined based on the first product and the first difference. The purification speed of the air purifier is then determined based on the second product and the size of the space to be purified. The preset value is related to the range of the air exchange rate. When the air exchange rate ranges from 0 to 1, the corresponding preset value can be 1.

[0063] For example, the real-time PM2.5 concentration is Q, with units of μg / m³. 3 The air volume of an air purifier is expressed as F or F', where F is measured in meters. 3 / h, F' is in m3 / min, and the size of the space to be cleaned is V, in meters. 3 Let k be the purification speed of the air purifier, with units of μg / (m^3·h) or μg / (m^3·min), H be the air exchange rate per hour, and H' be the air exchange rate per minute. Then, the purification speed of the air purifier can be expressed as:

[0064]

[0065] When determining the purification speed of an air purifier, the duration of its purification effect can be predetermined. Within this predetermined duration, the air quality after the calculated purification speed can be estimated. Based on the estimated air quality, the purification speed can be updated. Then, based on the updated purification speed, the air quality after the predetermined duration can be further estimated. This iterative estimation process allows for the prediction of changes in air quality during the air purifier's operation.

[0066] The duration of action is not the actual duration of the air purifier's purification speed. It is a duration set to facilitate estimation of the air purifier's purification results at different times. This duration can be a small value, such as 1 minute, 50 seconds, or 70 seconds.

[0067] The standard deviation of air quality is the square root of the difference between the air quality value and the average air quality value. The standard deviation corresponding to the purification rate refers to the standard deviation calculated based on multiple air quality samples collected at predetermined first time intervals within the duration of the purification rate.

[0068] For example, within the action time corresponding to the purification rate, n air quality samples can be collected at a predetermined first time interval, denoted as q1, q2, ..., qn. The corresponding standard deviation σ is: Where q' is the average of n air masses.

[0069] When the air quality used to calculate the purification speed is the air quality at the initial moment, i.e., the air quality before the air purifier purifies the air, the resulting purification speed is the first purification speed within the predetermined operating time after the air purifier starts, such as the first purification speed within one minute of startup. Multiple air quality samples can be collected at predetermined first time intervals within that one minute of startup, and the standard deviation corresponding to the first purification speed can be calculated.

[0070] In S102, the target air quality of the air purifier is determined based on the purification speed and the standard deviation corresponding to the purification speed.

[0071] The target air quality is the air quality that the air purifier needs to achieve during this air purification process. The target air quality can be determined based on the purification speed. When the purification speed begins to fall below a predetermined speed threshold, it indicates that the current purification efficiency is very low, and continuous high-speed operation is energy-inefficient. For example, a speed threshold of 1 can be set. When the estimated purification speed begins to fall below 1, the corresponding air quality is the target air quality.

[0072] Once the purification speed and the corresponding standard deviation are determined, the target air quality of the air purifier can be determined based on the ratio of the purification speed to the standard deviation.

[0073] For example, let the target air quality of the space to be purified be Q', the purification rate be k, and σ be the standard deviation corresponding to the purification rate. Assuming the purification rate lasts for 1 minute, then σ is the standard deviation of the air quality within that 1 minute. Therefore, the target air quality Q' = k / σ.

[0074] Based on the purification speed and the corresponding standard deviation of the air purifier when it starts, the target air quality that the air purifier needs to achieve during this purification process can be calculated when the purifier starts. This makes it easier to quickly determine the target value for this purification and thus helps the air purifier to quickly determine the time required for this purification process.

[0075] The target air quality is determined based on the target air quality calculation formula, and the purification time is determined based on the predicted data and detection data, as shown in the table below:

[0076]

[0077]

[0078] According to the test data, when the initial air quality PM2.5 = 1000, the optimal PM2.5 that can be achieved according to the formula is 4.278. When PM2.5 = 4, the purification rate is 0.765710069, which is less than 1, and is considered to be extremely low purification efficiency. It can be considered that the PM2.5 in the space has reached the target air quality at this time, and it is meaningless to continue at a high speed. The purifier can be turned off or run at a low speed.

[0079] In S103, the working state of the air purifier is controlled according to the target air quality and the purification speed of the air purifier.

[0080] Once the target air quality is determined, air quality changes over time can be predicted using iterative air quality estimation methods. Specifically, this can be done as follows: Figure 2 As shown, the process of estimating the purification time may include:

[0081] In S201, the first air quality at the first moment is obtained, and the first purification speed at the first moment is calculated.

[0082] The first moment can be the moment the air purifier starts, or any other time. The first air quality of the space to be tested can be detected by an air quality sensor. Based on the first air quality at the first moment, the first purification speed at the first moment can be calculated according to equation (1) or equation (2) by combining the size of the space to be tested, the air volume, and possibly the air exchange rate.

[0083] In S202, the second air quality at the second moment is inferred based on the first purification speed and the first air quality.

[0084] Based on the calculated first purification rate, the duration of the first purification process can be estimated, such as the second air quality after one minute of purification.

[0085] When the unit duration defined by the first purification speed is the duration of the first purification speed, the second air quality at the second moment can be determined directly by the difference between the first air quality and the first purification speed.

[0086] The time interval between the first moment and the second moment is the duration of the first purification speed.

[0087] In S203, when the second air quality is greater than the target air quality, a second purification speed is calculated based on the second air quality, and a third air quality at a third time is obtained based on the second purification speed, until the calculated Nth air quality at the Nth time is less than or equal to the target air quality, or the Nth purification speed at the Nth time is less than a predetermined speed threshold, and the purification time of the air purifier is obtained.

[0088] The second air quality is compared with the pre-calculated target air quality. If the second air quality is less than or equal to the target air quality, that is, the second air quality is better than the target air quality, it means that the purification target has been achieved, and the required purification time can be determined as the duration of the first purification rate.

[0089] If the second air quality is greater than the target air quality, it indicates that the current air quality is worse than the target air quality and further purification is needed. Using the same calculation method, a third air quality can be calculated after purification at the second purification speed for a predetermined duration. This third air quality is then compared to the target air quality. If the third air quality is still greater than the target air quality, a fourth air quality is calculated, and so on, until the calculated air quality begins to fall below the target air quality, or the purification speed corresponding to that air quality falls below a predetermined speed threshold. This is then determined as the required purification time for the air purifier. The speed threshold can be set according to different application scenarios; for example, the speed threshold can be set to a value of 1.

[0090] For example, if the air quality starts to be less than or equal to the target air quality at the Nth air quality level, and the duration of each purification speed is the same, then the purification time for the air purifier in this purification operation can be determined as (N-1)*T, where T is the duration of each purification speed. After the air purifier has completed this purification time, it can switch to a lower speed or be turned off.

[0091] Since this application can determine the target air quality based on the purification speed and standard deviation of air quality within a predetermined time when the air purifier is started, it can quickly determine the duration of this purification, which helps to ensure the purification effect after the air purifier is running, and reduces the inefficient running time at high speed, thus saving energy.

[0092] Figure 3 This is a schematic diagram illustrating the implementation flow of a control method for an air purifier provided in an embodiment of this application, as shown below. Figure 3 As shown, the implementation process includes:

[0093] In S301, obtain the size of the space to be purified.

[0094] The size of the space to be cleaned can be input by the user or determined by obtaining an image or size information of the space to be cleaned.

[0095] In S302, the initial air mass is determined.

[0096] The initial air quality can be obtained by detecting the air quality sensor in the air purifier.

[0097] In S303, the purification rate within a predetermined time period is calculated.

[0098] Based on the determined initial air quality and the size of the space to be purified, combined with the air volume of the air purifier, the purification speed of the air purifier at the initial moment can be calculated using formula (1) or formula (2).

[0099] In S304, the standard deviation of air quality over a predetermined period of time is calculated.

[0100] It can detect the air quality within the duration of the initial purification speed, i.e., within a predetermined time, and determine the standard deviation of the air quality within the predetermined time based on the detected multiple air quality values.

[0101] In S305, the target air quality is calculated based on the purification rate and standard deviation.

[0102] The target air quality can be determined based on the ratio of purification rate to standard deviation.

[0103] In S306, the air quality is determined after a predetermined duration.

[0104] Based on the initial purification rate and the initial air quality, the air quality after a predetermined purification period, i.e., the duration of the purification process at the initial purification rate, can be calculated.

[0105] In the S307, the purification speed is updated based on air quality.

[0106] Once the air quality is determined, the purification speed can be updated based on the new air quality.

[0107] In S308, the air quality after a predetermined time is calculated based on the purification speed.

[0108] Based on the updated purification rate, the air quality after purification can be calculated within the duration of the purification rate's effect.

[0109] In S309, it is determined whether the air quality has reached the target air quality.

[0110] If the target air quality has not been achieved, the purification time is increased and the process returns to S307. If the target air quality has been achieved, the process proceeds to S310 to determine the purification time.

[0111] In S311, the operation of the air purifier is controlled according to the purification time.

[0112] When the air purifier has not yet reached the required purification time, it can be operated at a higher setting. When the air purifier has reached the required purification time, it can be operated at a lower setting, or the air purifier can be turned off.

[0113] When applying the air purifier control method in the embodiments of this application, an application for setting or controlling the air purifier can be added. This application can be installed on a smart terminal, making it convenient for users to set and control according to actual conditions.

[0114] When users interact with the device or control it using the application, they can first input the size of the space to be purified in the smart terminal. The smart terminal sends the collected size of the space to the air purifier, which then runs for a predetermined duration, such as 60 seconds, to detect the target air quality and estimate the purification time required to achieve it. The target air quality and purification time are displayed on a prompt interface. After receiving confirmation, the air purifier can control its operation according to the purification time. Once the purification time is reached, a prompt interface is generated, displaying the duration of the operation and information on changes in air quality before and after the operation.

[0115] It should be understood that the sequence number of each step in the above embodiments does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0116] Figure 4 This is a schematic diagram of a control device for an air purifier provided in an embodiment of this application, as shown below. Figure 4 As shown, the device includes:

[0117] The data acquisition and determination unit 401 is used to determine the purification speed of the air purifier and the standard deviation of the air quality corresponding to the purification speed.

[0118] The target air quality determination unit 402 is used to determine the target air quality of the air purifier based on the purification speed and the standard deviation corresponding to the purification speed.

[0119] The purification control unit 403 is used to control the working state of the air purifier according to the target air quality and the purification speed of the air purifier.

[0120] Figure 4 The control device of the air purifier shown is... Figure 1 The control method of the air purifier shown corresponds to this.

[0121] Figure 5This is a schematic diagram of an air purifier provided in one embodiment of this application. Figure 5 As shown, the air purifier 5 of this embodiment includes: a processor 50, a memory 51, and a computer program 52 stored in the memory 51 and executable on the processor 50, such as a control program for the air purifier. When the processor 50 executes the computer program 52, it implements the steps in the control method embodiments of the various air purifiers described above. Alternatively, when the processor 50 executes the computer program 52, it implements the functions of each module / unit in the various device embodiments described above.

[0122] For example, the computer program 52 may be divided into one or more modules / units, which are stored in the memory 51 and executed by the processor 50 to complete this application. The one or more modules / units may be a series of computer program instruction segments capable of performing specific functions, which describe the execution process of the computer program 52 in the air purifier 5.

[0123] The air purifier may include, but is not limited to, a processor 50 and a memory 51. Those skilled in the art will understand that... Figure 5 This is merely an example of air purifier 5 and does not constitute a limitation on air purifier 5. It may include more or fewer components than shown, or combine certain components, or different components. For example, the air purifier may also include input / output devices, network access devices, buses, etc.

[0124] The processor 50 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor.

[0125] The memory 51 can be an internal storage unit of the air purifier 5, such as a hard drive or memory of the air purifier 5. The memory 51 can also be an external storage device of the air purifier 5, such as a plug-in hard drive, smart media card (SMC), secure digital (SD) card, flash card, etc., equipped on the air purifier 5. Furthermore, the memory 51 can include both internal storage units and external storage devices of the air purifier 5. The memory 51 is used to store the computer program and other programs and data required by the air purifier. The memory 51 can also be used to temporarily store data that has been output or will be output.

[0126] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the above-described division of functional units and modules is merely an example. In practical applications, the above functions can be assigned to different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiments can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit. Furthermore, the specific names of the functional units and modules are only for easy differentiation and are not intended to limit the scope of protection of this application. The specific working process of the units and modules in the above system can be referred to the corresponding process in the foregoing method embodiments, and will not be repeated here.

[0127] In the above embodiments, the descriptions of each embodiment have different focuses. For parts that are not described in detail or recorded in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0128] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0129] In the embodiments provided in this application, it should be understood that the disclosed devices / terminal equipment and methods can be implemented in other ways. For example, the device / terminal equipment embodiments described above are merely illustrative. For instance, the division of modules or units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0130] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0131] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0132] If the integrated module / unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by hardware related to computer program instructions. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0133] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A control method for an air purifier, characterized in that, The method includes: The purification speed of the air purifier is determined, and the standard deviation of the air quality corresponding to the purification speed is determined. The standard deviation refers to the standard deviation calculated based on multiple air qualities collected during the duration of the purification speed. The target air quality of the air purifier is determined based on the ratio of the purification speed to the standard deviation corresponding to the purification speed. The operating status of the air purifier is controlled based on the target air quality and the purification speed of the air purifier.

2. The method according to claim 1, characterized in that, Determining the purification speed of the air purifier includes: Determine the real-time air quality, the size of the space where the air purifier is located, and the airflow of the air purifier; A first product is obtained based on the real-time air quality and the airflow of the air purifier, and the purification speed of the air purifier is determined based on the ratio of the first product to the size of the space to be purified.

3. The method according to claim 1, characterized in that, Determining the purification speed of the air purifier includes: Determine the real-time air quality, the size of the space where the air purifier is located, the air exchange rate of the space to be purified, and the air volume of the air purifier; A first product is obtained based on the real-time air quality and the airflow of the air purifier. A first difference is determined based on a preset value and the air exchange rate of the space to be purified. A second product is determined based on the first product and the first difference. The purification speed of the air purifier is determined based on the second product and the size of the space to be purified.

4. The method according to claim 1, characterized in that, Determining the standard deviation of air quality corresponding to the purification rate includes: During the duration of the purification speed, multiple air quality measurements are obtained at predetermined first time intervals. The standard deviation of the air quality corresponding to the purification speed is obtained based on the multiple air quality values.

5. The method according to claim 1, characterized in that, Based on the target air quality and the purification speed of the air purifier, control the operating state of the air purifier, including: The purification time of the air purifier is determined based on the target air quality and the purification speed of the air purifier. The working status of the air purifier is controlled according to the purification time.

6. The method according to claim 5, characterized in that, The purification time of the air purifier is determined based on the target air quality and the purification speed of the air purifier, including: Obtain the first air quality at the first moment and calculate the first purification speed at the first moment; The second air quality at the second moment is inferred based on the first purification speed and the first air quality. When the second air quality is greater than the target air quality, the second purification speed is calculated based on the second air quality, and the third air quality at the third moment is obtained based on the second purification speed. This process continues until the calculated Nth air quality at the Nth moment is less than or equal to the target air quality, or the Nth purification speed at the Nth moment is less than a predetermined speed threshold. The purification time of the air purifier is then obtained, where the time interval between two adjacent moments is equal, and N is a natural number greater than or equal to 2.

7. A control device for an air purifier, characterized in that, The device includes: The data acquisition and determination unit is used to determine the purification speed of the air purifier and the standard deviation of the air quality corresponding to the purification speed. The standard deviation refers to the standard deviation calculated based on multiple air qualities collected during the duration of the purification speed. The target air quality determination unit is used to determine the target air quality of the air purifier based on the ratio of the purification speed to the standard deviation corresponding to the purification speed. The purification control unit is used to control the operating status of the air purifier based on the target air quality and the purification speed of the air purifier.

8. An air purifier, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the steps of the method as described in any one of claims 1 to 6.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method as described in any one of claims 1 to 6.

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