Disposable primary filter cover and air purifier

Abstract

The utility model relates to a disposable primary filter cover and an air purifier, the whole filter cover is of a barrel-shaped structure, and the filter cover comprises a filter material layer, an elastic band structure and a visual developing area, the filtering material layer is of a main body structure and is used for filtering large-particle pollutants in air; the elastic band structures are arranged at the two ends of the barrel-shaped structure and used for being connected and fixed to the outer portion of a barrel-shaped filter element of the air purifier in a sleeving mode. The visual color developing area is arranged on the filtering material layer and is used for generating color change along with pollution load change, so that the use state of the filtering cover can be observed and judged from the outside. Through a convenient installation structure and a visual prompt function, the use convenience of the air purifier and the perception experience of a user are improved, meanwhile, the main filter element of the air purifier can be effectively protected, and the overall use cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to air purification technical field especially relates to a disposable primary filter cover and air purifier. BACKGROUND

[0002] The existing air purifier mostly adopts barrel-shaped or sheet-shaped filter core, and the primary filter screen is generally not detachable, so the user needs to clean the large-particle pollutants regularly. This cleaning method is complicated to operate, and the user cannot directly observe the pollution state, so it is difficult to accurately grasp the time node of equipment maintenance, affecting the user experience and equipment maintenance effect. At the same time, the primary filter screen that cannot be detached will gradually decrease the purification effect after long-term use, and the user is difficult to detect, resulting in that the indoor air quality cannot be effectively guaranteed. SUMMARY

[0003] The utility model aims at providing a disposable primary filter cover and air purifier, which improves the convenience of using the air purifier and the user's perceptual experience through the convenient installation structure and visual prompt function, and effectively protects the main filter core of the air purifier, thereby reducing the overall use cost.

[0004] The utility model provides a disposable primary filter cover, which is in a barrel-shaped structure and comprises a filter material layer, an elastic band structure and a visual color development area.

[0005] The filter material layer is the main structure and is used for filtering large-particle pollutants in the air.

[0006] The elastic band structure is arranged at both ends of the barrel-shaped structure and is used for sleeving and fixing the outside of the barrel-shaped filter core of the air purifier.

[0007] The visual color development area is arranged on the filter material layer and is used for changing color with the change of pollution load to provide external observation and judgment of the use state of the filter cover.

[0008] Further, the filter material is made of light-colored fiber cloth to improve the visual contrast effect after the accumulation of pollutants.

[0009] Further, the elastic band structure is an elastic belt-shaped structure.

[0010] Further, the visual color development area adopts a dust load sensing patch to realize color development change when the dust load reaches a threshold value.

[0011] Further, the dust load sensing patch is a chemical color development type patch, the base thereof is made of flexible PET film, and the edge is coated with a transparent UV curing protective coating.

[0012] Further, the visual color development zone realizes the color change from light to dark with the increase of dust load by using a composite dye made of an azo color developing agent, a polymer carrier and nano-sized sensitized particles.

[0013] The utility model also provides an air purifier, including disposable primary filter cover.

[0014] Further, the air purifier further comprises an LED indication system connected with the air purifier host, and the LED indication system comprises an LED indication lamp for prompting the replacement of the primary filter cover.

[0015] By the disposable primary filter cover and the air purifier, the following technical effects are achieved.

[0016] 1) The elastic band structure is used to realize quick installation, the visual color development zone is used to realize the visual pollution prompting function, and the problem of inconvenient use of the primary filter screen of the traditional air purifier is solved.

[0017] 2) The barrel-shaped filter core and the sheet-shaped filter core structure are adapted, and the air purifier is widely applicable to various air purification scenes such as family, office and medical treatment, can meet the air purification requirements in different environments, simplify the maintenance process, reduce the use cost, and prolong the service life of the air purifier main filter core.

[0018] The above description is only a summary of the technical scheme of the utility model, in order to more clearly understand the technical means of the utility model, and the content of the specification can be implemented, the following preferred embodiments of the utility model are described in detail in combination with the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the structure schematic diagram of disposable primary filter cover of the utility model, and the overall appearance and main components of the filter cover are displayed.

[0020] Figure 2 It is the installation state diagram of the filter cover sleeve connected outside the barrel-shaped filter core of the utility model, and the actual situation after the installation of the filter cover is presented.

[0021] Figure 3 It is the pollution degree change schematic diagram of the visual color development zone of the utility model, and the color or pattern change of the visual color development zone with the pollution accumulation is embodied.

[0022] Figure 4 It is the prompt state schematic diagram of the filter cover in cooperation with the LED indication lamp of the utility model. DETAILED DESCRIPTION

[0023] The specific embodiments of the utility model are further described in detail in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0024] Term explanation:

[0025] Dust load sensing patch: A dust load sensing patch is a functional patch made of dust-loving color-changing materials. This dust-loving color-changing material has unique physical and chemical properties, which can specifically adsorb and react with dust and other pollutants. When the filter cover is in operation, as dust and other large-particle pollutants accumulate on the surface of the patch, its load gradually increases. When the load reaches the pre-set standard threshold, the chemical composition inside the patch changes, causing the color of the patch to change significantly, prompting the user in an intuitive and eye-catching way that the load of the filter cover has reached the level that needs to be replaced. The patch is designed to precisely control its sensitivity to pollutants and the response threshold of color change, ensuring that it can timely and accurately send a replacement prompt signal when the filter cover reaches the reasonable use limit, thus ensuring that the air purifier is always in a high-efficiency purification state.

[0026] Features of dust load sensing patch:

[0027] High sensing sensitivity: It can accurately capture a small amount of dust particles attached and respond to small changes in the accumulation of pollutants, ensuring that the user is reminded to replace the filter cover in time before it reaches a serious clogging state, maintaining the stability of the air purifier's purification performance.

[0028] Fast response speed: From the time the dust load reaches the threshold to the time the patch color changes significantly, the entire process takes very little time, providing a clear replacement prompt to the user in a short time, avoiding the impact of delayed prompts on air purification effect and normal operation of the equipment.

[0029] Strong stability: It can maintain stable performance in different environmental conditions, such as temperature and humidity changes in a wide range, reliably play its dust load sensing and color prompting function, and is not easily affected by environmental factors to cause false judgments.

[0030] Low energy consumption: It does not rely on additional complex power supply systems, and only through physical and chemical reactions with dust and other pollutants to achieve color change, without consuming electric energy, reducing the operating cost and complexity of the entire filter cover.

[0031] Customizability: The size, shape, color change mode and dust load response threshold of the patch can be adjusted according to different air purification needs and filter cover designs, making it better adapt to various air purifier products and use scenarios.

[0032] Common types of dust load sensing patch:

[0033] Chemical color development type: This type of patch mainly relies on specific chemical reactions to achieve color change. The patch contains reagents sensitive to certain chemical components in dust. When dust adheres and comes into contact with the reagents, it triggers a chemical reaction, causing the molecular structure of the reagents to change, thereby causing the patch to exhibit different colors. For example, some patches will undergo redox reactions or acid-base neutralization reactions when they come into contact with metal oxides or acidic substances in the dust, thereby changing color. This type of patch has a clear color development effect, but it is relatively sensitive to dust with specific chemical components, and its versatility is relatively weak.

[0034] Physical adsorption type: It relies on the physical adsorption characteristics of the material itself to realize load sensing. The patch uses materials with large specific surface area and strong adsorption capacity, such as porous silica gel, activated carbon fiber, etc. As dust is continuously adsorbed on the surface of the patch, its physical structure and optical properties change, thereby causing the color to change. This type of patch has good adsorption effect on various dust particles, has wide application range, but may have the problem of color change not being obvious after adsorption saturation, so it is necessary to reasonably design the adsorption capacity and color change mechanism of the patch.

[0035] Nanomaterial type: Dust load sensing patch prepared by using nanotechnology, which utilizes the unique surface effect and quantum size effect of nanomaterials. Nanomaterials have extremely high surface activity and can more efficiently adsorb dust particles. During the adsorption process, the electronic structure and optical properties of nanomaterials change significantly, thereby achieving sensitive response of color. This type of patch has the advantages of fast response speed and high sensitivity, but its preparation process is complex and the cost is relatively high.

[0036] Optical sensing type: Optical sensing type dust load sensing patch realizes dust load detection based on the principle of light reflection, transmission or scattering. The patch integrates a miniature optical sensor inside. When dust particles adhere to the surface of the patch, they change the propagation path and intensity of light on the surface of the patch. For example, the accumulation of dust will make the originally smooth surface of the patch rough, causing the scattering of light to increase and the intensity of reflected light to weaken. The optical sensor monitors the change in light intensity in real time and converts the optical signal into an electrical signal. Through a pre-set algorithm, the electrical signal is compared with the dust load threshold value. Once the electrical signal reaches or exceeds the threshold value, the patch will trigger the corresponding prompt mechanism, such as emitting a specific color of light through the built-in light-emitting element, or connecting with external display devices to visually remind the user that the filter cover needs to be replaced. This type of patch has the advantages of non-contact detection, fast response speed, and high precision, and can accurately sense the accumulation of dust particles of different particle sizes, and is not easily affected by the chemical composition of dust, and has strong versatility. However, optical sensing type patch is sensitive to environmental light interference. In strong light or unstable light environment, additional optical filtering and calibration devices may need to be added to ensure the accuracy of the detection results.

[0037] Resistance induction type: The resistance induction type dust load induction patch utilizes the characteristic that the resistance of the material changes with the dust adhesion amount to achieve load detection. The patch uses a material with certain conductivity, such as a polymer film doped with metal particles. In the clean state, the conductive path inside the material is relatively smooth and the resistance value is at a low level; as dust continuously adheres to the surface of the patch, the dust particles will hinder the transmission of electrons, resulting in a gradual increase in the resistance value of the material. By connecting a circuit at both ends of the patch, the change in the resistance value is measured in real time and the measurement result is compared with a preset resistance threshold. When the resistance value exceeds the threshold, it indicates that the dust load has reached the level where the filter element needs to be replaced. At this time, the patch triggers an alarm or a prompt signal through the circuit. The resistance induction type patch has a simple structure, low cost, and is easy to integrate into the filter element. However, its detection accuracy is relatively limited and is greatly affected by factors such as the conductivity and humidity of the dust particles. For example, a humid environment may make the dust particles have certain conductivity, resulting in abnormal changes in the resistance value and affecting the accuracy of detection.

[0038] Reference Figures 1 to 3 As shown, this embodiment provides a disposable primary filter element, which is of a barrel-shaped structure as a whole and includes a filter material layer 11, an elastic band structure 12, and a visible color display area 13; the filter material layer 11 is the main structure for filtering large particle pollutants in the air; the elastic band structure 12 is provided at both ends of the barrel-shaped structure for sleeving and fixing outside the barrel-shaped filter element 21 of the air purifier; the visible color display area 13 is provided in the filter material layer 11 (a preset specific area) for generating color changes with the change of the pollution load for external observation to judge the use state of the filter element.

[0039] In this embodiment, the filter material 11 is made of a light-colored fiber fabric to enhance the visible contrast effect after pollutant accumulation. Lightweight, differently colored non-woven fabrics or porous fabric materials can be selected, which can efficiently intercept hairs, dust, and other large particle pollutants to ensure the air purification effect.

[0040] In this embodiment, the elastic band structure 12 is an elastic band-shaped structure. An elastic band is provided around the filter element. By using the elasticity of the elastic band, it can be directly sleeved outside the barrel-shaped filter element to achieve quick installation and stable fixation, preventing gas leakage.

[0041] In this embodiment, the visible color display area 13 uses a dust load induction patch 14 to achieve a color change when the dust load reaches the threshold. The dust load induction patch is made of a dust-attracting color-changing material. When the load reaches the preset standard, the color of the patch changes significantly, timely prompting the user to replace the filter element.

[0042] In other examples, the visual color development zone 13 can also be implemented by a composite dye made of an azo-based color developer, a macromolecular polymer carrier and nanoscale sensitized particles to achieve a color change from light to dark with increasing dust load. For example, the color is initially light (e.g. white or beige), and as the pollutants accumulate, the color gradually darkens or a pattern change appears, without the user having to turn on the purifier, so that the user can directly see the pollution level from the outside.

[0043] Filter cover component parameters are shown in Table 1.

[0044] Table 1 Filter cover component parameter table

[0045]

[0046]

[0047]

[0048] Referring to Figure 4 The embodiment also provides an air purifier, which comprises the disposable primary filter cover.

[0049] To achieve the auxiliary prompting function, the air purifier can further be provided with an LED indication system connected with the air purifier host. The LED indication system comprises an LED indication lamp 22 for prompting that the primary filter cover needs to be replaced. The LED indication system cooperates with the purifier host. When the primary filter is heavily polluted, the LED indication lamp 22 is synchronously turned on or changes color, further enhancing the prompting effect and ensuring that the user can timely perceive and replace the filter cover.

[0050] Test data:

[0051] 1. Test environment construction

[0052] In a standard test laboratory meeting the ISO 16890 standard, a closed test space with a size of 5m x 4m x 3m is constructed. A high-precision TSI 8533 type air particulate generator is provided, which can generate PM10 and PM2.5 mixed dust with a concentration range of 10-1000 μg / m 3 , and a fiber generating device simulating hair. A DMT143 type temperature and humidity sensor (precision ±0.2℃, ±1.5% RH) of Finland Vaisala Company, a 9565 type wind speed meter (precision ±0.03m / s) of American TSI Company and a 350 type smoke analyzer (which can detect the concentration of multiple gases) of German TESTO Company are installed, which are used to monitor the air quality parameters of the air inlet and outlet of the air purifier in real time. At the same time, a B&K 2250 type noise tester meeting the GB / T 3785.1-2010 standard is used to monitor the noise level of the air purifier during operation.

[0053] 2. Installation and replacement time test

[0054] Twenty testers with varying levels of proficiency were selected and divided into two groups of 10 each. Group A cleaned air purifiers with traditional non-removable primary filters, while Group B replaced air purifiers with disposable primary filters installed according to this embodiment. The traditional cleaning process was as follows: turn off the air purifier, use a special screwdriver to remove the six screws securing the outer casing, remove the primary filter, and use a brush (with moderately stiff bristles) and a handheld vacuum cleaner (12 kPa suction) to clean the dust and hair from the filter. After cleaning, reinstall the filter in reverse order, and record the total time from disassembly to installation. The filter replacement process in this embodiment was as follows: hold the edge of the filter's elastic band by hand and gently pull it outwards to remove the old filter. Align the new filter with the filter element, adjust its position, and record the operation time.

[0055] Test results show that the average cleaning time for Group A (traditional method) was 11 minutes and 30 seconds, with a standard deviation of 1 minute and 15 seconds; while the average installation and replacement time for the filter cover in Group B (this embodiment) was only 42 seconds, with a standard deviation of 8 seconds. Statistical analysis (t-test, P<0.01) demonstrates that this invention has a significant advantage in ease of installation and replacement, greatly improving user operating efficiency.

[0056] 3. Visibility test of contamination status

[0057] Within the test space, the air particulate matter generator was set to continuously produce PM10 at a concentration of 300 μg / m³. 3 PM2.5 concentration was 150 μg / m³ 3 The system was tested for 8 hours to remove polluted air. Every hour, 20 testers (including people of different ages and vision levels) observed the pollution status of the visible color display area of ​​the filter cover, the dust load sensing patch, and the primary filter of a traditional air purifier.

[0058] For traditional primary filters, the pollution level cannot be directly observed. Twenty testers were unable to accurately determine the degree of pollution, only able to infer the need for cleaning through indirect phenomena such as increased noise from the air purifier, but the accuracy rate was less than 30%. In contrast, the filter cover of this invention shows that the visible color-changing area changes from light beige to light yellow after 1 hour, to light brown after 3 hours, and to dark brown after 6 hours. The dust load sensing patch changes from colorless and transparent to dark brown when the dust load reaches 50 mg / m² (approximately 4 hours of operation). All testers were able to accurately determine the degree of pollution and the need for replacement of the filter cover based on the color changes, achieving 100% accuracy and significantly improving the visibility of pollution conditions.

[0059] 4. Main filter element life test

[0060] Prepare 4 air purifiers of the same model, numbered A1, A2, B1, B2. A1, A2 install the disposable primary filter cover of the embodiment, and B1, B2 use the configuration without the primary filter device. In the test space, run 12 hours a day, and test for 60 days as a cycle. During the operation, keep the pollutant concentration generated by the air particulate generator stable (PM10 concentration 400 μg / m 3 , PM2.5 concentration 200 μg / m 3 ).

[0061] After the test, the main filter cartridges of the 4 air purifiers are tested professionally. The Welas 3000 aerosol particle size spectrometer of Palas Company in Germany is used to measure the filtration efficiency of the main filter cartridges, and the pressure sensor (accuracy ±0.1 Pa) is used to measure the resistance of the main filter cartridges. The results show that the resistance of the main filter cartridges of B1 and B2 increases from the initial 120 Pa to 450 Pa, and the filtration efficiency decreases from 98% to 63%; while the resistance of the main filter cartridges of A1 and A2 installed with the filter cover of the utility model increases from 120 Pa to 220 Pa, and the filtration efficiency decreases to 92%. It is calculated that the main filter cartridge life is prolonged by about 42% by the utility model, which effectively reduces the overall use cost and maintenance frequency of the air purifier.

[0062] 5. Comprehensive performance test

[0063] The air purifier installed with the filter cover of the utility model and the air purifier using the traditional primary filter screen are placed in the test space at the same time, and the maximum purification gear (air volume 600 m 3 / h) is turned on. At the time nodes of 0.5 hours, 1 hour, 2 hours and 4 hours, use multiple air quality monitoring equipment to measure the PM10, PM2.5 concentration, wind speed, air volume and noise level of the air inlet and air outlet at the same time.

[0064] The test data is shown in Table 2 as follows:

[0065] Table 2 Test data

[0066]

[0067] From the data, it can be seen that the particulate matter concentration at the air outlet of the air purifier of the utility model decreases faster in the same running time, and the PM10 and PM2.5 concentrations are significantly lower than those of the traditional equipment after 4 hours, and the purification efficiency is increased by about 28% than the traditional scheme. At the same time, the running noise is stable at 43-46 dB(A), while the noise of the traditional scheme is 55-58 dB(A), and the utility model effectively reduces the noise while ensuring high efficiency purification, providing users with a more comfortable use experience.

[0068] The disposable primary filter cover and air purifier have the following technical effects:

[0069] 1) The quick installation is realized by adopting the elastic band structure, the visual pollution prompt function is realized by combining the visual color developing area, and the problem of inconvenient use of the traditional air purifier primary filter screen is solved.

[0070] 2) The barrel-shaped filter element and the sheet-shaped filter element structure are adapted, and the disposable primary filter cover is widely applicable to various air purification scenes such as families, offices and medical treatment, can meet the air purification demand in different environments, simplify the maintenance process, reduce the use cost and prolong the service life of the air purifier main filter element.

[0071] The utility model is compared with prior art as shown in table 3.

[0072] Table 3 comparison table of the utility model and prior art

[0073]

[0074] The preferred embodiments of the utility model are described above, and the utility model is not limited to the above, and it should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made without departing from the technical principles of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A disposable prefiltering cover characterized in that, Its whole is a barrel structure, including filter material layer, elastic band structure, visible color development area; The filter material layer is the main structure, used for filtering large particles of pollutants in the air; The elastic band structure is arranged at both ends of the barrel structure, used for sleeving and fixing on the outside of the barrel-shaped filter core of the air purifier; The visible color development area is arranged on the filter material layer, used for producing color change with pollution load change, to provide external observation and judgment of the use state of the filter cover.

2. The primary efficiency filter cover of claim 1, wherein, The filter material is made of light-colored fiber cloth to improve the visual contrast effect after the accumulation of pollutants.

3. The primary efficiency filter cover of claim 1, wherein, The elastic band structure is a belt structure with elasticity.

4. The primary efficiency filter cover of claim 1, wherein, The visible color development area uses a dust load sensing patch to realize color change when the dust load reaches a threshold value.

5. The primary efficiency filter cover of claim 4, wherein, The dust load sensing patch uses a chemical color developing type patch, the base of which is a flexible PET film, and the edge is coated with a transparent UV curing protective coating.

6. An air cleaner characterized by comprising: It also includes an LED indication system connected with the air purifier main machine, and the LED indication system includes an LED indication lamp for prompting the replacement of the primary filter cover.

7. The air cleaner of claim 6, wherein, ​

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