Self-cleaning energy-saving door and window
Patent Information
- Application Number
- CN202521773061.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-20
- Publication Date
- 2026-08-18
- Estimated Expiration
- 2035-08-20
AI Technical Summary
这类方案需额外供电并增加运动部件，导致成本上升(增加约30％-50％)、结构复杂性提高，且存在故障维修风险，违背建筑门窗低维护需求的原则
[0021]1、高效自清洁：光催化涂层在阳光照射下能分解附着在玻璃表面的有机污染物，亲水性使雨水能均匀铺展成水膜(而非水珠)，减少光散射并最大程度带走已分解或悬浮的灰尘颗粒。导水筋结构优化雨水流向，增强冲刷效果，有效降低人工清洁频率，节省成本。
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Figure CN224648439U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door and window technology, and in particular to a self-cleaning energy-saving door and window. Background Technology
[0002] With the acceleration of urbanization and the popularization of green building concepts, building doors and windows, as a key component of the building envelope, directly affect the building's energy consumption, indoor environmental quality, and long-term maintenance costs. Traditional doors and windows face two major challenges in long-term use: light transmittance reduction due to surface contamination and energy waste caused by insufficient thermal performance. Current technologies have not yet effectively solved the problem of synergistic optimization between these two issues.
[0003] The severity of surface contamination problems
[0004] The exterior surfaces of windows and door frames are constantly exposed to the atmosphere, easily accumulating pollutants such as dust, exhaust particles, pollen, and bird droppings. This pollution not only affects the aesthetics of buildings but also significantly reduces the efficiency of natural lighting. To maintain indoor light intensity, users are forced to increase the duration of artificial lighting, indirectly increasing building energy consumption. Furthermore, cleaning the exterior windows of high-rise buildings requires working at heights, posing safety hazards, and the cost of a single cleaning can be more than 10 times that of ordinary residential windows.
[0005] Limitations of existing self-cleaning technologies
[0006] Currently, solutions for self-cleaning doors and windows mainly fall into two categories:
[0007] 1. Functional Coating Technologies: Such as titanium dioxide (TiO2) photocatalytic coatings or silicon-based hydrophobic coatings. Photocatalytic coatings rely on ultraviolet light to activate and decompose organic matter, but their effectiveness is limited in rainy, low-sunlight areas. While hydrophobic coatings can promote water droplet roll-off, they are ineffective at removing highly adhesive, viscous contaminants (such as resin) and lack durability (typically failing within 3-5 years). More importantly, these coatings are mostly used in single-pane glass, making them difficult to integrate with energy-saving insulated glass structures.
[0008] 2. Mechanically assisted cleaning devices: such as integrated miniature wipers or sprinkler systems. These solutions require additional power and increase moving parts, leading to increased costs (approximately 30%-50%), increased structural complexity, and the risk of malfunction and repair, which contradicts the principle of low maintenance requirements for building doors and windows. Utility Model Content
[0009] To overcome the shortcomings of existing technologies, this invention provides a self-cleaning, energy-saving door and window. The nano-titanium dioxide coating on the outer glass decomposes organic pollutants under ultraviolet light. Combined with the coating's super-hydrophilicity, rainwater spreads evenly into a water film (rather than water droplets). This design significantly improves pollutant removal efficiency—experiments show that the grease removal rate is 40% higher than that of traditional hydrophobic coatings.
[0010] The water-guiding channels in the window frame precisely guide rainwater along its path, creating a continuous flow of water that covers the glass surface. Compared to windows without a water-guiding structure, the rainwater coverage in the central area of the glass is increased by 60%, completely eliminating the problem of hard-to-clean corners at the edges.
[0011] It relies entirely on natural rainfall for cleaning, requiring no external energy sources such as motors or sprayers, and reduces the failure rate by more than 95% compared to mechanical cleaning solutions.
[0012] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a self-cleaning energy-saving door and window, including a window frame, a glass assembly installed in the window frame, and a drainage system. The window frame and the outermost glass of the glass assembly are sealed by a sealing strip. The outer surface of the outermost glass of the glass assembly facing the outside is covered with a photocatalytic self-cleaning coating. The glass assembly is a multi-layer hollow glass structure, and the inner surface of at least one piece of the multi-layer hollow glass structure is covered with a Low-E low-emissivity coating. The drainage system includes: a water collection trough with a slope design located on the bottom outside of the window frame and a water guiding structure for guiding rainwater to wash the outer surface of the outermost glass and flow to the water collection trough.
[0013] Furthermore, the perimeter of the multi-layer insulated glass structure is sealed with a warm edge spacer strip.
[0014] Furthermore, the window frame profile is a multi-cavity thermally broken structure, which is connected to the inner profile body and the outer profile body by a thermal break strip.
[0015] Furthermore, the water guiding structure is disposed on the outer track groove surface of the window frame or on the outer surface of the window frame adjacent to the outermost glass layer.
[0016] Furthermore, the photocatalytic self-cleaning coating is a nano-titanium dioxide coating.
[0017] Furthermore, the glass assembly comprises at least two glass layers and at least one hollow cavity filled with an inert gas, which is argon or krypton.
[0018] Furthermore, the glass assembly has a triple-glass double-hollow structure.
[0019] Furthermore, the Low-E low-emissivity coating is applied to the surface of the innermost glass layer facing the interior in the multi-layer insulated glass structure, or to the surface of the intermediate spacer glass layer facing the interior in the multi-layer insulated glass structure.
[0020] Compared with the prior art, the beneficial effects that this utility model can achieve are:
[0021] 1. Highly efficient self-cleaning: Under sunlight, the photocatalytic coating decomposes organic pollutants adhering to the glass surface. Its hydrophilicity allows rainwater to spread evenly into a water film (rather than water droplets), reducing light scattering and carrying away decomposed or suspended dust particles to the greatest extent. The water-guiding rib structure optimizes rainwater flow, enhances the flushing effect, effectively reduces the frequency of manual cleaning, and saves costs.
[0022] 2. Excellent energy efficiency: Multi-layer insulated glass structure + inert gas filling + Low-E coating: greatly reduces radiative heat loss and convective heat transfer through the glass.
[0023] 3. Multi-cavity thermally broken profiles: significantly block the heat conduction channels of the window frame and sash profiles themselves.
[0024] 4. Warm edge spacer: Reduces heat loss at the edges of the insulating glass and avoids cold bridges caused by traditional aluminum spacers.
[0025] 5. Optimized structure and smooth drainage: The integrated water guiding, collecting and drainage system is reasonably designed, which can effectively guide rainwater to clean the glass and reliably drain water that seeps into the window or may form condensation (especially important in energy-saving windows with large temperature differences between the inside and outside), preventing water accumulation, corrosion and reduced heat insulation performance.
[0026] 6. Environmentally friendly and cost-controllable: It utilizes natural rainwater for cleaning, without the need for additional energy consumption and complex mechanical mechanisms; the main improvement components (coating, structural design) are easy to implement or improve based on existing mature door and window technologies, and the overall cost increase is relatively controllable.
[0027] 7. Improve lighting: Keep the glass surface clean to maximize the transmission of natural light (maintain the energy regulation benefits of the Low-E coating) and reduce the need for indoor lighting. Attached Figure Description
[0028] Figure 1 This is a three-dimensional structural diagram of the self-cleaning energy-saving door and window of this utility model;
[0029] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the self-cleaning energy-saving door and window of this utility model;
[0030] Figure 3 This is a schematic diagram of the glass assembly of the self-cleaning energy-saving door and window of this utility model.
[0031] The components include: window frame 1; sealing strip 2; glass assembly 3; hollow cavity 31; warm edge spacer 32; water collection trough 4; and water guiding structure 5. Detailed Implementation
[0032] To make the technical means, creative features, and achieved objectives and effects of this utility model easier to understand, the present utility model is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this utility model and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this utility model. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.
[0033] Example 1:
[0034] Combination Figure 1 — Figure 3 As shown, this utility model provides a self-cleaning energy-saving door and window, including a window frame 1, a glass assembly 3 installed inside the window frame 1, and a drainage system. The outermost glass of the window frame 1 and the glass assembly 3 are sealed by a sealing strip 2. The window frame 1 is made of 6063-T5 aluminum alloy profile, and the profile adopts a three-cavity aluminum alloy thermal break structure. The thermal insulation strip material is PA66GF25, with a width of 33mm. The outer surface of the outermost glass of the glass assembly 3 facing the outside is covered with a photocatalytic self-cleaning coating. The outer layer of the glass assembly 3 is a single pane of glass with a thickness of 5mm, and the outer surface is coated with a nano-TiO2 photocatalytic self-cleaning coating (approximately 0.5μm thick). The inner layer consists of two layers of glass with a thickness of 4mm, one of which has a single silver Low-E film coated on its inner surface (facing the hollow layer). The three layers of glass constitute a double-hollow triple-glazed structure, with a hollow cavity width of 12mm / 12mm, both filled with argon gas. The glass assembly 3, which uses warm edge composite material as the spacer of the insulated glass, is a multi-layer insulated glass structure. At least one glass in the multi-layer insulated glass structure has a Low-E low-emissivity coating on its inner surface. The drainage system includes a sloping water collection trough 4 located on the bottom outer side of the window frame 1 and a water guiding structure 5 for guiding rainwater to wash the outer surface of the outermost glass and flow to the water collection trough 4.
[0035] The perimeter of the multi-layered insulated glass structure is sealed with a warm edge spacer strip 32.
[0036] The window frame 1 features a multi-cavity thermally broken structure. This structure connects the inner and outer profile bodies via a thermal break strip. The thermal break strip is made of high-strength, low-thermal-conductivity polyamide nylon (PA66) with 25% glass fiber (GF25) and is 33mm wide. This thermal break strip is mechanically rolled and laminated to firmly connect the outer and inner profile bodies, forming an effective thermal bridge.
[0037] The water guiding structure 5 is set on the outer track groove surface of the window frame 1 or on the outer surface of the window frame 1 adjacent to the outermost glass.
[0038] The photocatalytic self-cleaning coating is a nano-titanium dioxide coating.
[0039] The glass assembly 3 includes at least two glass layers and at least one hollow cavity 31, which is filled with an inert gas, namely argon or krypton.
[0040] Glass component 3 is a triple-glass double-hollow structure.
[0041] Low-E low-emissivity coating is applied to the surface of the innermost glass layer facing the interior in a multi-layer insulated glass structure, or to the surface of the intermediate spacer glass layer facing the interior in a multi-layer insulated glass structure.
[0042] As rainwater falls, it is guided by the water-guiding structure 5 on the window frame and flows evenly over the surface of the photocatalytic self-cleaning coating on the outermost layer of glass. The hydrophilicity of the photocatalytic self-cleaning coating causes the rainwater to form a water film rather than water droplets, spreading evenly across the glass surface. Organic pollutants (such as bird droppings and oil stains) that have been pre-decomposed or loosened by sunlight (especially ultraviolet rays) are carried away by the water film. Inorganic particles such as dust are also washed away by the water flow. The washed-off wastewater flows along the glass surface into the water collection groove 4 at the bottom of the window frame and is eventually discharged by gravity or dripped off.
[0043] The triple-glazed double-hollow structure, argon filling, and Low-E coating work together to significantly reduce radiative and convective heat transfer. The Low-E coating selectively transmits visible light and reflects far-infrared thermal radiation (reducing heat loss from indoors to the outside, resulting in better insulation in winter; and reflecting some solar heat in summer, reducing heat gain). The multi-cavity thermal break structure and thermal break strips greatly block the heat conduction path of the metal profiles, and the warm edge spacer 32 eliminates the "cold bridge" formed at the glass edge by traditional aluminum spacers.
[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A self-cleaning energy-saving door and window comprising a window frame (1), a glass assembly (3) installed in the window frame (1), and a drainage system, the window frame (1) and the outermost glass of the glass assembly (3) being sealed by a sealing strip (2), characterized in that: The outermost glass of the glass assembly (3) is covered with a photocatalytic self-cleaning coating on the outer surface facing the outside; the glass assembly (3) is a multi-layer hollow glass structure, and the inner surface of at least one glass of the multi-layer hollow glass structure is covered with a Low-E low-emissivity coating; the drainage system includes: a water collection trough (4) with a slope design located on the outer side of the bottom of the window frame (1) and a water guiding structure (5) for guiding rainwater to wash the outer surface of the outermost glass and flow to the water collection trough (4).
2. The self-cleaning energy-saving door and window according to claim 1, characterized in that: The perimeter of the multi-layer insulated glass structure is sealed with a warm edge spacer (32).
3. The self-cleaning energy-saving door and window according to claim 1, characterized in that: The window frame (1) is a multi-cavity thermally broken structure, which is connected to the inner profile body and the outer profile body by thermal insulation strips.
4. The self-cleaning energy-saving door and window according to claim 1, characterized in that: The water guiding structure (5) is disposed on the outer track groove surface of the window frame (1) or on the outer surface of the window frame (1) adjacent to the outermost glass.
5. The self-cleaning energy-saving door and window according to claim 1, characterized in that: The photocatalytic self-cleaning coating is a nano-titanium dioxide coating.
6. The self-cleaning energy-saving door and window according to claim 1, characterized in that: The glass assembly (3) comprises at least two glass layers and at least one hollow cavity (31), the hollow cavity (31) being filled with an inert gas, which is argon or krypton.
7. The self-cleaning energy-saving door and window according to claim 1, characterized in that: The glass assembly (3) has a triple-glass double-hollow structure.
8. The self-cleaning energy-saving door and window according to claim 1, characterized in that: The Low-E low-emissivity coating is applied to the innermost glass layer facing the interior side of the multi-layer insulated glass structure, or to the surface of the intermediate spacer glass layer facing the interior side of the multi-layer insulated glass structure.