A filter screen life detection method, device, medium and air purification equipment

Abstract

The application provides a filter screen life detection method and device, a medium and an air purification equipment. The method comprises the following steps: acquiring a first dust concentration, a first formaldehyde concentration, a first temperature and a first humidity of an air inlet, and a second dust concentration, a second formaldehyde concentration, a second temperature and a second humidity of an air outlet; calculating a dust purification efficiency of the filter screen by using the first dust concentration and the second dust concentration, and calculating a formaldehyde purification efficiency of the filter screen by using the first formaldehyde concentration and the second formaldehyde concentration; determining a life detection result of the filter screen based on the dust purification efficiency, the formaldehyde purification efficiency, a temperature change amount of the first temperature and the second temperature, and a humidity change amount of the first humidity and the second humidity. The dust concentration, the formaldehyde concentration, the temperature and the humidity of the air inlet and the air outlet are detected, so that the filter screen state can be accurately reflected, the accuracy of detection can be ensured, the user can be accurately and effectively reminded to replace the filter screen, and the user experience is improved.

Description

Technical Field

[0001] This invention relates to the field of air purification technology, specifically to a filter life detection method, device, medium, and air purification equipment. Background Technology

[0002] With the increasing progress of society, environmental and air quality issues have received more and more attention, and air purifiers are being used more and more frequently. As the core component of filter-type air purifiers, how to effectively detect the lifespan of filters has become a key issue for improving the user experience of air purifiers.

[0003] Currently, most filter life reminders on the market are based on the usage time of the filter. However, since the actual usage scenarios of air purifiers are not the same, and the air quality in the actual usage environment is also different, a single time-based detection method will lead to inaccurate filter status detection results, making it difficult to accurately remind users to replace the filter. Summary of the Invention

[0004] In view of this, embodiments of the present invention provide a filter life detection method, device, medium, and air purification equipment to overcome the problem that the existing method of detecting filter status by timing filter usage time is difficult to accurately remind users to replace the filter.

[0005] According to a first aspect, embodiments of the present invention provide a filter life detection method, applied to an air purification device, wherein the filter is disposed between the air inlet and air outlet of the air purification device, and the filter media are dust and formaldehyde, characterized in that the method includes:

[0006] The first dust concentration, first formaldehyde concentration, first temperature, and first humidity of the air inlet are obtained, as well as the second dust concentration, second formaldehyde concentration, second temperature, and second humidity of the air outlet.

[0007] The dust purification efficiency of the filter is calculated using the first dust concentration and the second dust concentration, and the formaldehyde purification efficiency of the filter is calculated using the first formaldehyde concentration and the second formaldehyde concentration.

[0008] The filter life test results are determined based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity.

[0009] Optionally, determining the filter life test result based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity includes:

[0010] Determine whether the current formaldehyde purification efficiency is less than the second preset purification efficiency;

[0011] When the current formaldehyde purification efficiency is less than the second preset purification efficiency, determine whether the temperature change and / or the humidity change is less than the corresponding temperature change threshold and / or humidity change threshold.

[0012] When both the temperature change and the humidity change are less than the corresponding temperature change threshold and humidity change threshold, the filter life test result is determined to be that the filter needs to be replaced.

[0013] Optionally, before determining that the filter needs to be replaced based on the filter's lifespan test results, the method further includes:

[0014] The first duration during which both the temperature change and the humidity change are less than the corresponding temperature change threshold and humidity change threshold;

[0015] When the first preset time period is reached, the life test result of the filter screen is determined to be that the filter screen needs to be replaced.

[0016] Optionally, determining the filter life test result based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity further includes:

[0017] Determine whether the current dust purification efficiency is less than the first preset purification efficiency. When the current dust purification efficiency is less than the first preset purification efficiency, calculate the second duration during which the current dust purification efficiency is less than the first preset purification efficiency.

[0018] When the second time period reaches the second preset time period, the life test result of the filter screen is determined to be that the filter screen needs to be replaced.

[0019] Optionally, before determining that the filter needs to be replaced based on the filter's lifespan test results, the method further includes:

[0020] Determine whether the current cumulative usage time of the filter is greater than a third preset time, where the third preset time is the minimum working time for the filter to maintain normal working condition;

[0021] When the current cumulative usage time of the filter exceeds a third preset time, the life test result of the filter is determined to be that the filter needs to be replaced.

[0022] Optionally, when the filter life test result indicates that the filter needs to be replaced, a filter replacement prompt is issued.

[0023] Optionally, a fault warning is issued when the temperature change is not less than the corresponding temperature change threshold and / or the humidity change is not less than the corresponding humidity change threshold.

[0024] According to a second aspect, embodiments of the present invention provide a filter life detection device, applied to an air purification device, wherein the filter is disposed between the air inlet and air outlet of the air purification device, and the filter media are dust and formaldehyde; the device includes:

[0025] The acquisition module is used to acquire the first dust concentration, first formaldehyde concentration, first temperature and first humidity of the air inlet, and the second dust concentration, second formaldehyde concentration, second temperature and second humidity of the air outlet;

[0026] The calculation module is used to calculate the dust purification efficiency of the filter using the first dust concentration and the second dust concentration, and to calculate the formaldehyde purification efficiency of the filter using the first formaldehyde concentration and the second formaldehyde concentration.

[0027] The detection module is used to determine the life test result of the filter screen based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity.

[0028] According to a third aspect, embodiments of the present invention also provide an air purification device, a filter screen disposed between the air inlet and the air outlet of the air purification device, the filter screen filtering out dust and formaldehyde, the device further comprising: a controller, the controller comprising: a memory and a processor, the memory and the processor being communicatively connected to each other, the memory storing computer instructions, the processor executing the computer instructions to perform the filter life detection method described in the first aspect or any of its optional embodiments.

[0029] According to a fourth aspect, embodiments of the present invention provide a computer-readable storage medium storing computer instructions for causing the computer to perform the filter life detection method described in the first aspect, or any alternative embodiment thereof.

[0030] The technical solution of this invention has the following advantages:

[0031] 1. The filter life detection method provided in this embodiment of the invention acquires a first dust concentration, a first formaldehyde concentration, a first temperature, and a first humidity at the air inlet, and a second dust concentration, a second formaldehyde concentration, a second temperature, and a second humidity at the air outlet; calculates the dust purification efficiency of the filter using the first and second dust concentrations, and calculates the formaldehyde purification efficiency of the filter using the first and second formaldehyde concentrations; and determines the filter life detection result based on the dust purification efficiency, formaldehyde purification efficiency, temperature changes between the first and second temperatures, and humidity changes between the first and second humidity levels. Therefore, by detecting the dust concentration, formaldehyde concentration, temperature, and humidity at the air inlet and outlet of the air purifier, the real-time status of the filter is accurately reflected, unaffected by the usage scenario or air quality, ensuring the accuracy of the detection results. This allows for accurate and effective reminders to users to replace the filter, improving the user experience.

[0032] 2. The air purification device provided in this embodiment of the invention includes: a filter screen, which is disposed between the air inlet and the air outlet of the air purification device. The filter screen filters dust and formaldehyde. The device also includes: a controller, which is used to execute the filter screen life detection method provided in another embodiment of the invention. By detecting the dust concentration, formaldehyde concentration, temperature and humidity at the air inlet and air outlet of the air purification device, the real-time status of the filter screen can be accurately reflected. This is not affected by the usage scenario or air quality, ensuring the accuracy of the detection results. Consequently, it can accurately and effectively remind users to replace the filter screen, improving the user experience. Attached Figure Description

[0033] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of an air purification device according to an embodiment of the present invention;

[0035] Figure 2 This is a flowchart of a filter life detection method according to an embodiment of the present invention;

[0036] Figure 3 This is a schematic diagram of the filter life detection process according to an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the structure of a filter life detection device according to an embodiment of the present invention;

[0038] Figure 5This is a schematic diagram of the controller in an air purification device according to an embodiment of the present invention. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] The technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] With the increasing progress of society, environmental and air quality issues have received more and more attention, and air purifiers are being used more and more frequently. As the core component of filter-type air purifiers, how to effectively detect the lifespan of filters has become a key issue for improving the user experience of air purifiers.

[0042] Currently, most filter life reminders on the market are based on the usage time of the filter. However, since the actual usage scenarios of air purifiers are not the same, and the air quality in the actual usage environment is also different, a single time-based detection method will lead to inaccurate filter status detection results, making it difficult to accurately remind users to replace the filter.

[0043] To address the aforementioned problems, embodiments of the present invention provide a filter life detection method, applicable to, for example... Figure 1 The air purification device shown includes: a filter 1, which is disposed between the air inlet 21 and the air outlet 22 of the air purification device 2. The filter 1 filters dust and formaldehyde. The air purification device 2 also includes: a controller. Figure 1 (Not shown in the image). For a detailed description of the controller's operation, please refer to the relevant description in the method embodiments below; it will not be repeated here. For example, as... Figure 1 As shown, ambient air enters the air purifier 2 through the air inlet 21, and then passes through the filter 1 to purify, remove dust and formaldehyde before being discharged through the air outlet 22, thus achieving the function of purifying the air.

[0044] Specifically, the air purification device 2 mentioned above can be an air purifier or other products that use filters to achieve air purification functions. In this embodiment of the invention, an air purifier is used as an example for explanation, and this is only an example and is not a limitation thereof.

[0045] Figure 2 A flowchart of a filter life detection method according to an embodiment of the present invention is shown, as follows: Figure 2 As shown, the filter life testing method specifically includes the following steps:

[0046] Step S101: Obtain the first dust concentration, first formaldehyde concentration, first temperature and first humidity at the air inlet, and the second dust concentration, second formaldehyde concentration, second temperature and second humidity at the air outlet.

[0047] In practical applications, dust sensors, formaldehyde sensors, and temperature and humidity sensors can be installed at the air inlet and outlet of the air purification equipment to collect data on dust concentration, formaldehyde concentration, temperature, and humidity in real time.

[0048] Specifically, under normal circumstances, dust particles in the environment are absorbed by the filter after passing through the air inlet, resulting in a difference X1 in the dust concentration readings of the dust sensors at the air inlet and outlet. Similarly, formaldehyde gas in the environment, after passing through a filter containing a formaldehyde catalyst, will generate carbon dioxide and water under the catalysis of the catalyst (HCHO + O2 = CO2 + H2O). In addition to the difference X2 in the formaldehyde concentration readings of the formaldehyde sensors at the air inlet and outlet, carbon dioxide will cause the temperature at the air outlet to rise, resulting in a difference X3 in the temperature readings of the temperature and humidity sensors at the air inlet and outlet; while water will increase the humidity in the air, resulting in a difference X4 in the humidity readings of the temperature and humidity sensors at the air inlet and outlet.

[0049] Step S102: Calculate the dust purification efficiency of the filter using the first dust concentration and the second dust concentration, and calculate the formaldehyde purification efficiency of the filter using the first formaldehyde concentration and the second formaldehyde concentration.

[0050] Specifically, when the air purifier starts working, its controller continuously records the sampling data from the corresponding sensors and performs real-time calculations to obtain parameters that directly reflect the current purification status of the filter. The dust purification efficiency of the filter is Y1 (Y1 = X1 / A1), and the formaldehyde purification efficiency is Y2 (Y2 = X2 / B1). Because the water and carbon dioxide formed under the catalytic oxidation of formaldehyde do not significantly affect temperature and humidity as much as the changes in formaldehyde and dust concentration, the temperature change Y3 (Y3 = X3 / C1) and humidity change Y4 (Y4 = X4 / D1) can be used as reference values ​​simultaneously. A1, B1, C3, and D1 represent the dust concentration, formaldehyde concentration, temperature, and humidity collected by the dust sensor, formaldehyde sensor, and temperature and humidity sensor at the air outlet, respectively.

[0051] Step S103: Determine the filter life test results based on dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity.

[0052] Specifically, in one embodiment, step S103 described above includes the following steps:

[0053] Step S31: Determine whether the current formaldehyde purification efficiency is less than the second preset purification efficiency.

[0054] The first and second preset purification efficiencies are experimentally determined dust and formaldehyde purification efficiencies that indicate the filter's air purification capability meets the corresponding air purification function requirements of the air purifier. In practical applications, the first and second preset purification efficiencies are usually set to the same value, denoted by Z, such as Z = 95%. When the current dust purification efficiency is not less than the first preset purification efficiency, and the current formaldehyde purification efficiency is not less than the second preset purification efficiency (i.e., when both Y1 and Y2 are not less than Z), it indicates that the filter's purification efficiency meets the standard, the filter is in good condition, and correspondingly, the filter's lifespan test result is normal operation, and the filter does not report a fault.

[0055] Step S32: When the current formaldehyde purification efficiency is less than the second preset purification efficiency, determine whether the temperature change and / or humidity change is less than the corresponding temperature change threshold and / or humidity change threshold.

[0056] Specifically, when both the temperature change and humidity change are less than the corresponding temperature change threshold and humidity change threshold, the filter life test result indicates that the filter needs to be replaced. When the temperature change is not less than the corresponding temperature change threshold, and / or the humidity change is not less than the corresponding humidity change threshold, a fault warning is issued.

[0057] Among them, the temperature change threshold and humidity change threshold are the normal temperature and humidity changes in the environment where the air purifier is located. Once the temperature and humidity changes exceed the corresponding thresholds, it indicates that the filter is purifying formaldehyde and producing water and carbon dioxide, causing local temperature and humidity changes in the air outlet area. The temperature and humidity changes can help reflect the current formaldehyde purification capacity of the filter, further ensuring the accuracy of the final test results. When the temperature and humidity changes do not reflect the filter status in a consistent way with the formaldehyde purification efficiency, a fault warning is issued, which can avoid the problem of incorrect filter life test results due to formaldehyde sensor failure or temperature and humidity sensor failure, and further improve the accuracy of filter life test.

[0058] Specifically, in one embodiment, before determining that the filter's lifespan test result indicates that the filter needs to be replaced, the above method further includes the following steps:

[0059] Step S33: Calculate the duration for which both the temperature change and humidity change are less than the corresponding temperature change threshold and humidity change threshold, respectively.

[0060] Step S34: When the first preset time is reached, determine that the filter life test result indicates that the filter needs to be replaced.

[0061] Specifically, by determining whether the filter maintains its current formaldehyde removal state for a first preset time T1, the problem of inaccurate temperature and humidity data collected by the temperature and humidity sensor due to external interference is eliminated. This ensures that the filter is indeed in a state of insufficient formaldehyde removal capacity, thereby ensuring that the filter's lifespan reaches its maximum value without affecting the user's normal operating experience and reducing the cost of frequent filter replacements. For example, the specific value of T1 can be flexibly set according to the sampling frequency of the temperature and humidity sensor and the accuracy of the filter lifespan detection, such as 5 hours, etc., but this invention is not limited thereto.

[0062] Specifically, in one embodiment, step S103 above further includes the following steps:

[0063] Step S41: Determine whether the current dust purification efficiency is less than the first preset purification efficiency;

[0064] Step S42: When the current dust purification efficiency is less than the first preset purification efficiency, calculate the second duration during which the current dust purification efficiency is less than the first preset purification efficiency.

[0065] Step S43: When the second preset time is reached, determine that the filter life test result indicates that the filter needs to be replaced.

[0066] Specifically, by determining whether the filter maintains its current dust removal state for a second preset time, the problem of inaccurate dust concentration readings by the dust sensor caused by external interference is eliminated. This ensures that the filter is indeed in a state of insufficient dust removal capacity, thereby ensuring that the filter's lifespan reaches its maximum value without affecting the user's normal operating experience and reducing the cost of frequent filter replacements. For example, the specific value of the second preset time can be flexibly set according to the sampling frequency of the temperature and humidity sensor and the filter lifespan detection accuracy, such as 5 hours, the same as T1 mentioned above. However, this invention is not limited to this.

[0067] Specifically, in one embodiment, before determining that the filter's lifespan test result indicates that the filter needs to be replaced, the above method further includes the following steps:

[0068] Step S51: Determine whether the current cumulative usage time of the filter is greater than the third preset time. The third preset time is the minimum working time for the filter to maintain normal working status.

[0069] The third preset duration is longer than the first and second preset durations mentioned above.

[0070] Step S52: When the current cumulative usage time of the filter exceeds the third preset time, determine that the filter life test result indicates that the filter needs to be replaced.

[0071] The third preset duration T2 is the minimum lifespan of the filter, determined experimentally, to meet the air purification requirements of the air purification equipment. The specific value of T2 depends on the type of filter and the air purification needs of the air purification equipment, and can be flexibly set according to actual conditions. For example, T2 = 100 hours, etc. This invention is only an example and not a limitation. By comparing the current cumulative usage time of the filter with T2, errors in filter lifespan detection results caused by malfunctions of data acquisition equipment such as formaldehyde sensors, dust sensors, and temperature and humidity sensors can be further avoided, thus ensuring the accuracy of the filter lifespan detection results.

[0072] Specifically, in one embodiment, the method further includes: prompting the user to replace the filter when the filter life test result indicates that the filter needs to be replaced.

[0073] For example, such as Figure 3As shown, when both Y1 and Y2 are not less than Z, it indicates that the filter's purification efficiency meets the standard, the filter is in good condition, and the filter's lifespan test result is normal operation; the filter does not report a fault, and monitoring continues. When Y1 is less than Z and Y2 is greater than Z, if this state lasts longer than T1, and the filter's cumulative operating time has already exceeded T2, it indicates that the dust level in the user's environment may be consistently high, while the formaldehyde content may be relatively low, resulting in the filter's formaldehyde removal capacity remaining at a high level and its dust removal capacity decreasing. This reminds the user that the filter efficiency has decreased and a filter with stronger dust removal capacity (i.e., a dust removal filter) needs to be replaced. When Y1 is greater than Z and Y2 is less than Z, and Y3 and Y4 remain at low values ​​for a long time (within their respective thresholds) with no significant changes, if this state lasts longer than T1, and the filter's cumulative operating time has already exceeded T2, it indicates that the formaldehyde level in the user's environment may be consistently high, while the dust content may be relatively low, resulting in the filter's dust removal capacity remaining at a high level and its formaldehyde removal capacity decreasing. This alerts the user that the filter efficiency has decreased and needs to be replaced with a filter that has stronger formaldehyde removal capabilities (i.e., a formaldehyde-removing filter), thereby improving the air purifier's adaptability to the current environment. If Y3 and Y4 are not within their respective thresholds, it indicates a possible malfunction in the formaldehyde or temperature sensor, requiring timely troubleshooting to avoid affecting the filter lifespan assessment due to sensor failure. If Y1 and Y2 are consistently below Z, and the cumulative filter time has exceeded T2, the filter lifespan is considered reached, requiring the user to replace it. By utilizing multiple sensors to measure the temperature and humidity values, dust concentration values, and formaldehyde concentration values ​​at the air inlet and outlet, and processing these values ​​through software, the current purification capacity of the filter can be effectively analyzed, thus effectively determining the filter status and accurately reminding the user to replace the filter.

[0074] In addition, in practical applications, if Y1 and Y2 are consistently below Z, Y3 and Y4 can continue to be monitored. If Y3 and Y4 are not within their respective thresholds, it indicates that there may be a problem with the formaldehyde sensor or temperature sensor. By troubleshooting in a timely manner, the judgment of filter life can be avoided due to sensor failure.

[0075] By performing the above steps, the filter life detection method provided in this embodiment of the invention accurately reflects the real-time status of the filter by detecting the dust concentration, formaldehyde concentration, temperature and humidity at the air inlet and outlet of the air purifier. It is not affected by the usage scenario and air quality, ensuring the accuracy of the detection results. This allows for accurate and effective reminders to users to replace the filter, improving the user experience.

[0076] Figure 4 A schematic diagram of the filter life detection device provided by the present invention is shown, as follows: Figure 4As shown, the filter life detection device specifically includes:

[0077] The acquisition module 101 is used to acquire the first dust concentration, first formaldehyde concentration, first temperature, and first humidity at the air inlet, and the second dust concentration, second formaldehyde concentration, second temperature, and second humidity at the air outlet. For details, please refer to the relevant description of step S101 in the above method embodiment.

[0078] The calculation module 102 is used to calculate the dust purification efficiency of the filter using the first dust concentration and the second dust concentration, and to calculate the formaldehyde purification efficiency of the filter using the first formaldehyde concentration and the second formaldehyde concentration. For details, please refer to the relevant description of step S102 in the above method embodiments.

[0079] The detection module 103 is used to determine the filter life test result based on dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity. For details, please refer to the relevant description of step S103 in the above method embodiments.

[0080] The filter life detection device provided in this embodiment of the invention is used to execute the filter life detection method provided in the above embodiment. Its implementation method and principle are the same. For details, please refer to the relevant description of the above method embodiment, which will not be repeated here.

[0081] Through the synergistic cooperation of the above-mentioned components, the filter life detection device provided in this embodiment of the invention accurately reflects the real-time status of the filter by detecting the dust concentration, formaldehyde concentration, temperature and humidity at the air inlet and outlet of the air purification equipment. It is not affected by the usage scenario and air quality, ensuring the accuracy of the detection results. In turn, it can accurately and effectively remind users to replace the filter, improving the user experience.

[0082] Figure 5 A structural diagram of the controller in an air purification device according to an embodiment of the present invention is shown, as follows: Figure 5 As shown, the electronic device may include a processor 901 and a memory 902, wherein the processor 901 and the memory 902 may be connected via a bus or other means. Figure 5 Taking the example of a connection between China and Israel via a bus.

[0083] Processor 901 can be a Central Processing Unit (CPU). Processor 901 can also be 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, or combinations of the above types of chips.

[0084] The memory 902, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs, non-transitory computer-executable programs, and modules, such as the program instructions / modules corresponding to the methods in the above method embodiments. The processor 901 executes various functional applications and data processing of the processor by running the non-transitory software programs, instructions, and modules stored in the memory 902, thereby implementing the methods in the above method embodiments.

[0085] The memory 902 may include a program storage area and a data storage area. The program storage area may store the operating system and applications required for at least one function; the data storage area may store data created by the processor 901, etc. Furthermore, the memory 902 may include high-speed random access memory and may also include non-transitory memory, such as at least one disk storage device, flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 902 may optionally include memory remotely located relative to the processor 901, and these remote memories may be connected to the processor 901 via a network. Examples of such networks include, but are not limited to, the Internet, corporate intranets, local area networks, mobile communication networks, and combinations thereof.

[0086] One or more modules are stored in memory 902, and when executed by processor 901, they perform the methods described in the above method embodiments.

[0087] For details regarding the controller, please refer to the relevant descriptions and effects in the above method embodiments; they will not be repeated here.

[0088] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. The storage medium can be a magnetic disk, optical disk, read-only memory (ROM), random access memory (RAM), flash memory, hard disk drive (HDD), or solid-state drive (SSD), etc.; the storage medium can also include combinations of the above types of memory.

[0089] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A method for detecting filter lifespan, applied to an air purification device, wherein the filter is disposed between the air inlet and air outlet of the air purification device, and the filter media are dust and formaldehyde, characterized in that... The method includes: The first dust concentration, first formaldehyde concentration, first temperature, and first humidity of the air inlet are obtained, as well as the second dust concentration, second formaldehyde concentration, second temperature, and second humidity of the air outlet. The dust purification efficiency of the filter is calculated using the first dust concentration and the second dust concentration, and the formaldehyde purification efficiency of the filter is calculated using the first formaldehyde concentration and the second formaldehyde concentration. The filter life test results are determined based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity. The determination of the filter life test result based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity includes: Determine whether the current formaldehyde purification efficiency is less than the second preset purification efficiency; When the current formaldehyde purification efficiency is less than the second preset purification efficiency, it is determined whether the temperature change and / or humidity change is less than the corresponding temperature change threshold and / or humidity change threshold. The temperature change threshold and humidity change threshold are the normal temperature and humidity changes in the environment where the air purification equipment is located. If the temperature and humidity changes exceed the corresponding thresholds, it indicates that the filter produces water and carbon dioxide while purifying formaldehyde, causing local temperature and humidity changes in the air outlet area. When both the temperature change and the humidity change are less than the corresponding temperature change threshold and humidity change threshold, the filter life test result is determined to be that the filter needs to be replaced.

2. The method according to claim 1, characterized in that, Before determining that the filter needs to be replaced based on the filter's lifespan test results, the method further includes: The first duration during which both the temperature change and the humidity change are less than the corresponding temperature change threshold and humidity change threshold; When the first preset time period is reached, the life test result of the filter screen is determined to be that the filter screen needs to be replaced.

3. The method according to claim 1, characterized in that, The method of determining the filter life test result based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity also includes: Determine whether the current dust purification efficiency is less than the first preset purification efficiency; When the current dust purification efficiency is less than the first preset purification efficiency, the second duration during which the current dust purification efficiency is less than the first preset purification efficiency is recorded. When the second time period reaches the second preset time period, the life test result of the filter screen is determined to be that the filter screen needs to be replaced.

4. The method according to claim 2 or 3, characterized in that, Before determining that the filter needs to be replaced based on the filter's lifespan test results, the method further includes: Determine whether the current cumulative usage time of the filter is greater than a third preset time, where the third preset time is the minimum working time for the filter to maintain normal working condition; When the current cumulative usage time of the filter exceeds a third preset time, the life test result of the filter is determined to be that the filter needs to be replaced.

5. The method according to claim 4, characterized in that, When the filter life test result indicates that the filter needs to be replaced, a filter replacement prompt will be issued.

6. The method according to claim 1, characterized in that, A fault warning is issued when the temperature change is not less than the corresponding temperature change threshold and / or the humidity change is not less than the corresponding humidity change threshold.

7. A filter life detection device, applied to an air purification device, wherein the filter is disposed between the air inlet and the air outlet of the air purification device, and the filter media are dust and formaldehyde, characterized in that... The device includes: The acquisition module is used to acquire the first dust concentration, first formaldehyde concentration, first temperature and first humidity of the air inlet, and the second dust concentration, second formaldehyde concentration, second temperature and second humidity of the air outlet; The calculation module is used to calculate the dust purification efficiency of the filter using the first dust concentration and the second dust concentration, and to calculate the formaldehyde purification efficiency of the filter using the first formaldehyde concentration and the second formaldehyde concentration. The detection module is used to determine the filter life test result based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity. Determining the filter life test result based on the dust purification efficiency, formaldehyde purification efficiency, temperature change between the first temperature and the second temperature, and humidity change between the first humidity and the second humidity includes: determining whether the current formaldehyde purification efficiency is less than a second preset purification efficiency; when the current formaldehyde purification efficiency is less than the second preset purification efficiency, determining whether the temperature change and / or the humidity change are less than the corresponding temperature change threshold and / or humidity change threshold; the temperature change threshold and humidity change threshold are the normal temperature and humidity changes in the environment where the air purification equipment is located; if the temperature and humidity changes exceed the corresponding thresholds, it indicates that the filter is purifying formaldehyde and producing water and carbon dioxide, causing localized temperature and humidity changes at the air outlet.

8. An air purification device, comprising: A filter screen, wherein the filter screen is disposed between the air inlet and air outlet of the air purification device, and the filter screen filters dust and formaldehyde, characterized in that the device further includes: a controller. The controller includes a memory and a processor, which are communicatively connected to each other. The memory stores computer instructions, and the processor executes the computer instructions to perform the filter life detection method according to any one of claims 1-6.

9. The air purification device according to claim 8, characterized in that, The air purification device is an air purifier.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a computer to perform the filter life detection method according to any one of claims 1-6.

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