Nanofiber self-cleaning anti-haze intelligent screen window with physical adsorption function

Abstract

The invention discloses a nanofiber self-cleaning anti-haze intelligent screen window with a physical adsorption function, and belongs to the technical field of air purification and intelligent buildings. The product adopts a gradient nanofiber filter layer constructed by a centrifugal spinning technology, and has graded filtration and electrostatic adsorption capacities on particulate matters with different particle sizes; the screen window is integrated with an ultraviolet light catalysis module, and low-energy-consumption self-cleaning is achieved through a TiO2 coating; the air quality sensor monitors the PM2.5 concentration or the light transmittance and triggers the UV irradiation cleaning action. The whole system is provided with an Internet of Things communication module, and the operation state can be remotely monitored in real time. The air purifier is simple in structure and high in filtering efficiency, has the advantages of environmental protection, self-cleaning, intelligent control and the like, and is suitable for indoor air purification scenes such as residential buildings, schools and hospitals.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of indoor air purification and intelligent building energy saving, and particularly relates to a nano-fiber self-cleaning anti-haze intelligent screen window with physical adsorption function. BACKGROUND

[0002] With the development of industrialization and urbanization, fine particulate matters such as PM2.5 have become important air pollutants threatening human health. The existing traditional screen window has the functions of preventing insects and ventilation, but has weak blocking ability for haze particles, is easy to accumulate dust and block, and needs to be cleaned frequently by manual work, so the user experience is poor.

[0003] In addition, the existing air purification equipment can effectively filter particulate matters, but has high energy consumption and cost, and cannot be combined with natural ventilation, so it is difficult to meet the modern building requirements of energy saving, environmental protection and intelligence.

[0004] Therefore, there is an urgent need for a screen window product that can realize efficient physical filtration, self-cleaning and intelligent monitoring. SUMMARY

[0005] The technical problem to be solved by the application is that the traditional screen window cannot effectively prevent haze, is easy to accumulate dust and block, is inconvenient to maintain, cannot be effectively combined with the existing air purification equipment, has the defects of high energy consumption, cannot consider natural ventilation, and cannot master the running state of the screen window in real time.

[0006] To solve the above problems, the technical scheme adopted by the application is as follows:

[0007] The application provides a nano-fiber self-cleaning anti-haze intelligent screen window with physical adsorption function, which comprises a screen window body and a window frame for fixing the screen window body.

[0008] The gradient nano-fiber filter layer is formed by a spinning process of a high molecular material into a nano-fiber structure from thick to thin, and the nano-fiber structure is gradiently distributed from outside to inside, for grading filtration and physical adsorption of particulate matters with different particle sizes.

[0009] The ultraviolet light catalysis module is installed at the lower edge of the window frame and is arranged opposite to the gradient nano-fiber filter layer, for providing an ultraviolet light source required for a photocatalytic reaction.

[0010] The air quality sensor is installed on the inner side of the window frame and is close to the gradient nano-fiber filter layer, for detecting the PM2.5 concentration in the environment and the light transmittance of the filter layer, to trigger a cleaning action.

[0011] The embedded Internet of Things communication module is integrated in the side edge of the window frame and is electrically connected with the air quality sensor and the ultraviolet light catalysis module, for realizing remote monitoring and data uploading of the running state of the screen window.

[0012] Preferably, the gradient nanofiber filter layer is uniformly coated with a photocatalytic coating layer corresponding to the irradiation area of the ultraviolet photocatalytic module, which cooperates with the ultraviolet light generated by the ultraviolet photocatalytic module to achieve photocatalytic decomposition of the pollutants attached to the surface of the filter layer, realizing self-cleaning of the filter material.

[0013] Preferably, the areal density of the gradient nanofiber filter layer is 1.0-4.0 g / m 2 , the average fiber diameter is 100-400 nm, and the filtration efficiency for PM2.5 is 95%-99.9%.

[0014] Preferably, the high polymer material is polyvinyl alcohol (PVA) or polyvinylidene fluoride (PVDF), and the spinning process is centrifugal spinning.

[0015] Preferably, the air quality sensor is a laser dust sensor for real-time detection of PM2.5 concentration or light transmittance, and the detection end is directed towards the inner surface of the gradient nanofiber filter layer.

[0016] Preferably, the ultraviolet photocatalytic module is a 254 nm LED ultraviolet lamp bead connected to a control module based on a micro control chip, which can automatically execute a 5-10 minute ultraviolet irradiation cleaning cycle according to the detection results of the air quality sensor.

[0017] Preferably, the photocatalytic coating layer is a TiO2 coating layer.

[0018] Preferably, it further comprises a detachable connection structure arranged at the edges of the four corners of the window frame, which is used to modularly adsorb and install the screen window structure in the window body, enhances the connection and sealing of the window body, realizes the modular non-destructive installation and disassembly of the screen window, and the detachable connection structure is a high magnetic buckle, which is a ring structure and is embedded and fixed with the mounting groove of the window frame edge.

[0019] The beneficial effects achieved by the present application with the above structure are as follows:

[0020] 1. High filtration efficiency: the gradient nanofiber filter layer has a filtration efficiency for PM2.5 of 95%-99.9%, which can effectively intercept harmful particles in the air and has a significant anti-haze effect.

[0021] 2. Self-cleaning function: integrated with an ultraviolet photocatalytic module and a TiO2 coating layer, it can photocatalytically decompose the attached pollutants through low-energy ultraviolet light, reducing the frequency of manual cleaning and prolonging the service life of the screen window.

[0022] 3. Intelligent control: equipped with air quality sensor and Internet of Things communication module, can monitor PM2.5 concentration or light transmittance in real time, automatically trigger cleaning action, and support remote real-time monitoring of running state, meet the intelligent demand.

[0023] 4. Environmental protection and energy saving: no need to replace filter material frequently, and the energy consumption of self-cleaning process is low, which meets the requirements of green building and low-carbon environmental protection.

[0024] 5. Reasonable structure: modular design is adopted, lossless disassembly is realized through high magnetic buckle, the sealing property and user convenience are enhanced, and installation and maintenance are convenient. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The main view structure schematic diagram of the intelligent screen window provided in the application is shown in the figure.

[0026] Figure 2 The gradient nanofiber filter layer and PM2.5 interception schematic diagram provided in the application are shown in the figure.

[0027] Among them, 1, embedded Internet of Things communication module, 2, window frame, 3, gradient nanofiber filter layer, 4, ultraviolet light catalysis module, 5, air quality sensor, 6, high magnetic buckle.

[0028] The accompanying drawings are used to provide further understanding of the application, and constitute a part of the specification. Together with the embodiments of the application, they are used to explain the application, and do not constitute a limitation on the application. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the application will be described clearly and completely below in combination with the drawings in the embodiments of the application. Obviously, the described embodiments are only a part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application.

[0030] In the description of the application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the application and simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the application.

[0031] Embodiment 1

[0032] As Figure 1 and Figure 2As shown, the application provides a nanofiber self-cleaning anti-haze intelligent screen window with physical adsorption function, which comprises:

[0033] Gradient nanofiber filter layer:

[0034] It is the core filter structure, prepared by centrifugal spinning process, using PVA or PVDF as the material, forming a gradient nanofiber structure from coarse to fine. This structure can realize the hierarchical efficient filtration of particles of different particle sizes, the outer layer captures larger particles, and the inner layer intercepts PM2.5 and other fine particles. Its surface density is 1.0-4.0g / m 2 , the average fiber diameter is 100-400nm, and the PM2.5 filtration efficiency can reach 95%~99.9%. The surface is uniformly coated with a TiO2 coating for photocatalytic decomposition of pollutants in cooperation with UV irradiation.

[0035] UV photocatalytic module: installed at the lower edge (or side edge) of the window frame, using 254nm LED ultraviolet lamp beads. It is connected with the control module based on ESP32 chip, which can realize self-cleaning of the filter material in cooperation with the titanium dioxide photocatalytic coating, and automatically execute a cleaning cycle of 5~10 minutes.

[0036] Air quality sensor: ZH03B laser dust sensor is used to detect PM2.5 concentration or light transmittance. When the PM2.5 concentration exceeds the set threshold or the light transmittance decreases to the set value, the cleaning system is triggered.

[0037] Embedded Internet of Things communication module: used to connect with mobile terminal, realize remote monitoring and control of screen window state (such as pollution degree, filter life), facilitate user remote real-time monitoring of running state.

[0038] Window frame: plays a supporting role, used to fix the entire screen window structure, and install sensors, filter layers, UV modules and other elements. It can be made of aluminum alloy or ABS plastic, which is convenient for assembly and sealing.

[0039] High magnetic force buckle: located at the four corners of the window frame, as a detachable connection structure, used to modularly install the screen window structure in the window body, realize lossless disassembly, effectively enhance the sealing performance and user convenience.

[0040] Example 2

[0041] A gradient filter layer based on cross-linked PVA nanofiber is provided, which specifically comprises the following steps:

[0042] (1) Solution preparation: weigh 12wt% of polyvinyl alcohol (PVA) into deionized water, stir at 80℃ for 2 hours until completely dissolved, add 0.5wt% of glutaraldehyde as crosslinking agent, continue to stir for 30 minutes, and obtain cross-linked spinning solution.

[0043] (2) Centrifugal spinning: using speed gradient control (from 3000 rpm to 6000 rpm), nozzle diameter 0.5 mm, nozzle to base cloth distance 15 cm, spinning time 6 minutes, base cloth transverse movement speed 2 cm / s, forming a gradient fiber structure from thick to thin. The resulting filter layer is about 40-60 pm thick, with a surface density of about 2.0 g / m 2 .

[0044] (3) Photocatalytic coating treatment: uniformly spray TiO2 aqueous slurry on the surface of the fiber, dry with hot air at 50°C for 10 minutes, form a dense, strong adhesion photocatalytic film layer.

[0045] Tests show that the screen window has a PM2.5 particle filtration efficiency of 98.5% under natural ventilation, and the surface contaminants are effectively degraded within 10 minutes under UV irradiation, significantly extending the service life of the filter layer.

[0046] Example 3

[0047] A high-strength filter layer based on PVDF-TiO2 composite fibers is provided, comprising the following steps:

[0048] (1) Composite solution preparation: weigh 15wt% polyvinylidene fluoride (PVDF) powder, dissolve in a mixed solvent of dimethylacetamide (DMAc) and acetone (volume ratio 7:3), stir for 4 hours, add 1wt% nano TiO2 particles, ultrasonic dispersion for 30 minutes, to prepare a stable composite spinning solution.

[0049] (2) Centrifugal spinning preparation: set the nozzle diameter to 0.7 mm, the spinning speed to 5000 rpm, the spinning time to 8 minutes, the nozzle to receiving distance to 15 cm, and the base cloth movement speed to 1 cm / s. The resulting filter layer is about 50 pm thick.

[0050] (3) Composite fiber performance: the nano TiO2 particles are uniformly distributed in the PVDF fibers, giving good self-cleaning ability; the PVDF skeleton provides good tensile strength, moisture resistance and heat resistance, suitable for long-term outdoor ventilation use.

[0051] Performance test results: PM2.5 filtration efficiency of 99.2%, after continuous operation in a simulated smog environment for 30 days, the filtration efficiency decreases by less than 5%, and after UV activation, the initial performance can be restored by more than 90%.

[0052] The above describes the present application and its embodiments, which are not limited, and the drawings only show one of the embodiments of the present application, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the purpose of the present application, without creative design, similar structure and embodiments of the technical solution are not creative, and should belong to the protection scope of the present application.

Claims

1. A nanofiber self-cleaning anti-smog smart screen with physical adsorption function, comprising a screen body and a window frame (2) for fixing the screen body, characterized in that, The screen body includes: The gradient nanofiber filter layer (3) is formed by spinning polymer materials to form a nanofiber structure from coarse to fine. The nanofiber structure is distributed in a gradient from the outside to the inside, and is used for graded filtration and physical adsorption of particles of different sizes. The ultraviolet photocatalytic module (4) is installed at the lower edge of the window frame (2) and is positioned opposite to the gradient nanofiber filter layer (3) to provide the ultraviolet light source required for the photocatalytic reaction; An air quality sensor (5) is installed inside the window frame (2) and close to the gradient nanofiber filter layer (3) to detect the PM2.5 concentration and the light transmittance of the filter layer in the environment, so as to trigger the cleaning action. An embedded IoT communication module (1) is integrated into the side edge of the window frame (2) and electrically connected to the air quality sensor (5) and the ultraviolet photocatalytic module (4) to realize remote monitoring and data upload of the screen window's operating status.

2. The nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 1, characterized in that: The gradient nanofiber filter layer (3) is uniformly coated with a photocatalytic coating. The photocatalytic coating corresponds to the irradiation area of ​​the ultraviolet photocatalytic module (4). The photocatalytic coating, in conjunction with the ultraviolet light generated by the ultraviolet photocatalytic module (4), achieves photocatalytic decomposition of pollutants attached to the surface of the filter layer, thereby realizing the self-cleaning of the filter material.

3. The nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 2, characterized in that: The areal density of the gradient nanofiber filter layer (3) is 1.0-4.0 g / m³. 2 The average fiber diameter is 100-400nm, and the filtration efficiency for PM2.5 is 95%-99.9%.

4. The nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 1, characterized in that: The polymer material is polyvinyl alcohol or polyvinylidene fluoride, and the spinning process is centrifugal spinning.

5. The nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 1, characterized in that: The air quality sensor (5) is a laser dust sensor used to detect PM2.5 concentration or transmittance in real time, with its detection end facing the inner surface of the gradient nanofiber filter layer (3).

6. The nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 1, characterized in that: The ultraviolet photocatalytic module (4) is a 254nm LED ultraviolet lamp bead, which is connected to the control module. The control module is based on a microcontroller chip and can automatically perform a 5-10 minute ultraviolet irradiation cleaning cycle according to the detection results of the air quality sensor (5).

7. The nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 2, characterized in that: The photocatalytic coating is a TiO2 coating.

8. The nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 1, characterized in that: It also includes a detachable connection structure located at the four corners of the window frame (2) for modularly attaching the screen structure to the window body.

9. A nanofiber self-cleaning anti-smog smart screen with physical adsorption function according to claim 8, characterized in that: The detachable connection structure is a high magnetic buckle (6), which is a ring structure and is fitted and fixed to the mounting groove on the edge of the window frame (2).

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