Detailed explanation of 85 double internal broken bridge doors and windows system products | Full analysis of structure, sealing, hardware and performance

[85 pairs of inner open broken bridge doors and windows finished real scene, indoor perspective, double inner open open state, profile section sample placed next to]

85 double inner broken bridge door and window system is the mainstream 85 series broken bridge aluminum upgrade product on the market, with a frame width of 85mm and a double inner opening structure design, which is different from the conventional single inner opening and outer opening windows. The window sash opens to the indoor side, and supports two opening modes of inner casement and inverted. Both windows and double fans can be opened inward, taking into account safety, sealing and ventilation flexibility. It is a popular system window solution for high-rise residences, hardcover rooms and improved home improvement in recent years. Many owners and decoration designers can't tell the difference between ordinary 85 single inner opening windows and 85 double inner opening system windows when choosing windows, mistakenly thinking that there is only one more opening fan. In fact, the whole system has been systematically optimized in cavity structure, sealing layout, hardware adaptation, and drainage design. This article explains 85 pairs of inner opening and broken bridge doors and windows systems from multiple dimensions, taking into account professional depth and readability. It is suitable for home improvement owners, door and window dealers, and decoration companies to read, which is convenient for search engines to include and rank.

[Detailed cross-section of the profile | 85 double inner broken bridge aluminum profile cross-section marking drawing, marking frame width 85mm, multi-cavity, PA66 heat insulation strip, sealing slot position]

First, 85 double internal disconnection bridge system infrastructure parameters, understand the cavity design logic

85 double inner broken bridge doors and windows system, the width of the outer frame profile is 85mm, which belongs to the medium and wide body broken bridge system window. The profile substrate is made of 6063-T5 high-precision primary aluminum alloy, which is extruded. The profile wall thickness is strictly in accordance with the system window standard. The main frame wall thickness is ≥1.8mm, and the opening fan wall thickness is ≥2.0mm. It meets the high-rise wind pressure resistance design requirements, which is different from the 1.4mm thin-walled profile of ordinary engineering windows. The whole set of profiles adopts a multi-cavity structure design, which is divided into outdoor cavity, isobaric cavity, heat insulation cavity, and indoor cavity. The core functions of the multi-cavity are: to improve the overall rigidity of the profile and disperse the wind pressure load; to form an independent isobaric cavity and cooperate with the sealing structure to improve water tightness and airtightness; to separate hot and cold

The thermal insulation strip is the core component of the broken bridge system. The 85 double inner opening system comes standard with the national standard PA66 glass fiber reinforced nylon thermal insulation strip, with the original laser coding logo, and the width matches the 85 frame to block the hot and cold bridge of the aluminum profile and avoid the direct conduction of outdoor hot and cold into the room. The low-cost replacement PVC thermal insulation strip in the market is easy to soften at high temperature and crack at low temperature. Long-term use will cause deformation of the window sash and seal failure. Regular 85 system windows will not be used.

The core definition of double inner opening: the same window is equipped with two independent opening fans, both window fans are opened indoors, each with two opening methods of inner flat opening and inner inverted, and a neutral pole structure is set in the middle. The neutral pole is the key force-bearing component of this system. The thickened and reinforced design bears the force of the locking points of the window sashes on both sides to ensure that the double fans are opened and closed synchronously, and there will be no problems of shaking and lax closing of the fan body. Many miscellaneous brands simply add two inner opening fans to the ordinary 85 window frame, without special reinforcement of the neutral pole, and the long-term switch is easy to deform and sag.

[Schematic diagram of sealing structure | Three sections of sealing structure, marking the positions of outdoor sealing, isobaric chamber sealing, and indoor sealing strips]

Two or three isobaric sealing systems, high airtightness, high water tightness performance source

The 85 double inner broken bridge door and window system is standard with three EPDM EPDM continuous sealing structure, which adopts the principle of isobaric sealing, which is also the key to its airtight and water-tight performance better than ordinary two sealed windows. The three seals are arranged on the outside, the middle isobaric chamber, and the inside. The rubber strip is integrally bent and formed without breakpoint. The material is EPDM rubber, which is resistant to ultraviolet rays, high and low temperature. It is not easy to harden and shrink in the environment of -40 ° C to 120 ° C. The service life can reach more than 15 years.

The outer seal blocks most of the rain and dust; the middle seal builds an isobaric cavity to balance the air pressure inside and outside the cavity and prevent rainwater from penetrating into the cavity under the action of wind pressure; the inner seal isolates the leakage of indoor air conditioning air conditioning and heating, and blocks outdoor noise. The three seals cooperate with each other to make the air tightness of the whole window up to level 6 and the water tightness up to level 5, which can meet the needs of home improvement in rainy and typhoon areas in the south.

Compared with ordinary two sealed broken bridge windows, 85 pairs of inner opening and three seals have stronger resistance to rainwater backflow in windy and rainstorm weather; during air conditioning and heating seasons, it reduces the loss of hot and cold air and reduces energy consumption. Here it is necessary to distinguish: the three seals are not simple to add an extra rubber strip. The position of the profile card slot and the space of the isobaric cavity must match the rubber strip. The non-system window is equipped with rubber strips later, which cannot achieve the true isobaric sealing effect.

[Hidden drainage real picture | 85 double inner opening system hidden drainage tank, guide hole, drainage cover details close-up]

III. Hidden drainage structure design, taking into account beauty and anti-backflow

The 85 double inner broken bridge door and window system is equipped with a hidden drainage scheme, which is also the mainstream configuration of high-end system windows now, which is different from the traditional exposed drainage holes. An independent drainage channel is reserved inside the profile cavity. After the rainwater seeps into the isobaric chamber, it flows along the diversion groove to the outer drainage hole. The drainage hole is equipped with a windproof diversion cover, which can not only drain smoothly, but also block the reverse backflow of strong wind and rainwater, and at the same time block mosquitoes and dust from entering the cavity.

The biggest advantage of hidden drainage: the front of the indoor and outdoor can not see the abrupt drainage port, the appearance is simple and beautiful; the drainage channel and the main sealing chamber are independent of each other, and the rainwater will not flow to the indoor side. During processing, the drainage hole and the air pressure balance hole must be opened in pairs to ensure the air pressure balance inside and outside the cavity. If only the drainage hole is opened without the air pressure balance hole, the water pressure cannot be discharged in the strong wind environment, and the hidden danger of water seepage is prone to occur.

Many low-priced 85 pairs of inner windows simplify the drainage structure and directly open the cavity for drainage. There is no independent diversion cavity. When a rainstorm is accompanied by strong winds, the probability of water seepage increases significantly, which is also the reason for the high frequency of water leakage in the later stage of the owner.

[U slot hardware matching picture | German Grid/Haobo U slot inner opening and inner inverted hardware complete set, lock point, lock seat, hinge, actuator real shot]

IV. Special U-slot inner opening and inner inverted hardware system, dual-fan synchronous and stable opening and closing

The synchronicity and load-bearing capacity requirements of the double inner opening structure for hardware are much higher than those of the single inner opening window. The 85 double inner opening and breaking bridge system adopts the standard U-slot slot design, which is suitable for imported brands Haobo, Gewu and domestic first-line brands. The whole set of hardware includes actuator, multi-point lock point, load-bearing hinge, anti-misoperation device, wind support and handle. Each opening fan is a multi-point locking structure, and multiple lock points in a circle are locked synchronously. When closed, the rubber strip is evenly pressed, and the sealing force is uniform, so there will be no local gaps.

The anti-error device is a standard component to prevent the inner flat opening and inner inverted modes from being turned on at the same time, so as to avoid the window sash getting stuck and bumping. The hinge load-bearing is matched according to the size of the window sash, and the conventional load-bearing capacity of a single sash is 80-100kg. The large glass wide sash adopts a reinforced hinge to prevent the window sash from sinking and rubbing against the frame for a long time.

The advantages of the double inner opening structure are reflected in the ventilation: it can be slightly ventilated in a single fan, and the rainwater is not easy to float into the room; it can also be opened in one fan and poured in the other to form convection ventilation; for high-rise residents, the inner opening design does not have the risk of window fans falling outside, and there is no hidden danger of falling outside windows. Property and high-rise communities are recommended first. Open all indoors, it is safer and more convenient to clean the glass and clean the outer glass, which is also the biggest selling point of the double inner opening type.

[Glass configuration comparison chart | 5 + 20A + 5 insulating glass, 5 + 0.76PVB laminated hollow, Low-E warm edge insulating glass sample]

Glass matching scheme, heat insulation, sound insulation, energy-saving K value control

The 85 double inner open and broken bridge door and window system is suitable for a variety of insulating glass configurations. Glass is the core component that affects the heat transfer coefficient K value and sound insulation performance of the whole window. Basic standard: 5mm + 20A air layer + 5mm double-layer hollow tempered glass, hollow layer 20A, compared with 12A and 15A hollow, the sound insulation and heat insulation effect is better; the upgrade plan uses offline/online Low-E insulating glass, with 4SG warm edge spacers, replacing traditional aluminum spacers, reducing glass edge cold bridges, and reducing the probability of condensation. The K value of the whole window can be 2.4~ 2.8 W/(m2 · K), reaching the standard of ultra-low energy-saving windows.

For units with loud street noise, laminated insulating glass (5 + 0.76PVB + 5 + 12A + 5) can be upgraded to improve the sound insulation effect of medium and low frequencies; laminated hollow configuration is preferred near roads, elevated roads and expressways. All glass is 3C certified tempered glass, and the corners are finely ground to avoid stress self-explosion.

Buying mistakes: Many merchants only report profile series, and they do not know the thickness of the hollow, whether it is Low-E, or whether it is warm. The same is 85 pairs of inner openings, and the glass configuration is different. The price and energy-saving effect vary greatly.

[Schematic diagram of performance test report | Summary of wind pressure resistance, airtightness, water tightness and thermal insulation performance test]

The performance index of the whole window is suitable for different working conditions in China

A set of qualified 85 pairs of internal broken bridge system windows, with clear reference standards for various performance indicators:

Wind pressure resistance: up to level 9, suitable for use in high-rise and coastal typhoon areas.

Airtightness: 6 grades;

Water tightness: Grade 5

Sound insulation performance: ordinary hollow 32-35dB, laminated hollow up to 38-42dB;

Insulation K value: basic hollow K3.0, Low-E warm edge configuration K≤2.8.

This system is not limited to southern cities. In cold northern regions, low-E argon-filled glass can also meet the needs of winter insulation. In high-salt spray areas along the coast, fluorocarbon spraying is used on the surface of profiles to improve corrosion resistance. Ordinary home decoration is powder sprayed, which is more cost-effective.

Surface treatment process is optional: electrostatic powder spraying, fluorocarbon spraying, wood grain transfer. Wood grain transfer is suitable for new Chinese decoration style. It is recommended to transfer on the indoor side, and long-term sun exposure on the outside will give priority to powder or fluorocarbon to delay fading.

[Installation node diagram | Window frame foaming, external wall weathering glue, frame installation, waterproof closing node]

Seven, standardized installation points, system window performance guarantee

No matter how good the system profiles and hardware glass are, if the installation is not in place, the performance will be directly discounted. 85 pairs of inner broken bridge doors and windows are installed with exclusive specifications. Stainless steel expansion screws are preferred for window frame fixing, and the fixed point spacing is in line with the specifications; the window frame and wall gaps are filled with high-density polyurethane foaming agent, and the foaming is full and continuous; the outer closure is waterproof and additional treatment, neutral silicone weathering glue is used, and beauty glue is used on the inside.

When installing, it is necessary to ensure that the window frame is horizontal and vertical, and the diagonal error is controlled within 2mm. If the window frame is skewed, the opening of the double inner fan will not lock smoothly, and the seal will be tight and loose at the same time. The position of the double inner opening neutral stile is the key point of installation. It is necessary to ensure that the neutral stile is vertical, otherwise the gap between the two windows will be uneven after closing. After completion, repeatedly test the inner flat opening and inner inverted switching, check that all lock points are occluded, test whether the rubber strip is pressed evenly after closing, and check the water seepage point.

[Home improvement real picture | Living room balcony 85 pairs of inner open floor-to-ceiling windows, indoor modern decoration effect]

VIII. Summary of applicable scenarios and product advantages

85 pairs of inner open and broken bridge doors and windows systems are very suitable for high-rise residential, commercial housing balcony window sealing, bedroom windows, children's rooms, and large flat floors to improve decoration. Core advantages summary:

Double fan inside open inside pour, a variety of ventilation mode, clean glass safety;

Three isobaric seals + hidden drainage, high airtightness and high water tightness, rainstorm resistance;

85 multi-cavity broken bridge structure, wind pressure resistance, high-rise safety;

Multi-point locking U-slot hardware, smooth and durable opening and closing;

The choice of glass is flexible, allowing for both energy conservation and sound insulation.

Limitation reminder: Double inner opening fans take up space indoors, and the window edge cannot be close to the cabinet or bedside, so open space should be reserved; the budget is higher than 85 single inner opening windows, and the hardware and processing accuracy requirements are high. It is difficult for small workshops to do double-fan simultaneous debugging.

[Comparison of advantages and disadvantages | Poor quality simplified 85 pairs of inner openings (two seals, thin profiles, exposed drainage) and details comparison of standard system windows]

Nine, buy pit avoidance guide, avoid market reduction routine

Many merchants in the market rub the keyword "85 pairs of internal openings", and the product is not a real system window. Common reduction routines:

Profile wall thickness reduction, 1.4mm thin-walled profile, no reinforced neutral stile, just splicing two inner open fans;

Simplified into two seals, falsely claiming three seals, no isobaric cavity structure;

Ordinary exposed drainage hole, cancel the air pressure balance hole, easy to seep water;

Unbranded inferior hardware, insufficient load-bearing, half a year sash sinking, unable to pour;

The aluminum spacer glass is disguised as warm edge Low-E, and the energy-saving parameters are falsely marked.

The order contract must state: frame width 85mm, profile wall thickness, PA66 heat insulation strip, three seals, hidden drainage, hardware brand, glass specifications, warm edge strip, whole window quality assurance years. Preference is given to manufacturers with system drawings and performance test reports.

[Product renderings | 85 pairs of inner open and broken bridge windows, the whole floor renderings]

conclusion

The 85 double inner opening and broken bridge door and window system is a mature mid-to-high-end system window solution that takes into account safety, ventilation, sealing and energy saving. The 85mm frame size balances the profile strength, thermal insulation performance and cost, and the double inner opening and inner opening form is perfectly adapted to the domestic high-rise home improvement environment. It is not simply putting two inner opening windows together, but a system product designed from the integrated design of cavity structure, sealing, drainage and hardware.

When the owner purchases, don't just look at the name 85 series, focus on verifying the profile wall thickness, sealing structure, drainage form, hardware configuration, and glass parameters. Processing accuracy and standardized installation also determine the final airtight, watertight, sound insulation and energy-saving effect of the window. Whether it is balcony window sealing, bedroom window changing, the pursuit of high-level safety, a variety of ventilation methods, and excellent sealing performance, 85 pairs of inner open and broken bridge doors and windows systems are a comprehensive cost-effective choice.