[China Aluminum Industry Network] The principle of heat insulation aluminum alloy doors and windows in the middle of the aluminum profile into the insulation bar, the aluminum break to form a broken bridge, effectively prevent the heat conduction. Insulation aluminum alloy doors and windows of thermal conductivity than non-separated Hot aluminum alloy doors and windows reduce 40 to 70%.
Elevator doors have two major types, manual and automatic. Manual doors are normally opened and closed manually by hand, and automatic doors are the standard type of doors found in modern days elevators, usually powered by a door operator.
Non-automatic/manual doors
Automatic doors
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New technical characteristics of heat-insulating aluminum alloy doors and windows, application of heat-insulating aluminum alloy profiles. Rolling method is used to combine the inner and outer aluminum alloys and the heat insulation strips.
⊙Insulating glass is used to improve insulation and sound insulation.
⊙ Adopt independent sealing structure, push-pull window adopts double-rubber double-strip four-seal structure; flat open window uses equal pressure principle, adopts one hard seal and two soft seal three seal structures, and has excellent airtightness and watertightness.
⊙ choose high-end accessories, beautiful shape, flexible operation, safe and reliable, is conducive to the thermal insulation of doors and windows.
Advantages of heat-insulating aluminum alloy doors and windows to reduce heat transfer: using heat-insulating aluminum alloy, its thermal conductivity is 1.8-3.5W/m2·k·h, which is much lower than ordinary aluminum alloy profiles 140～170W/m2·k·h; The use of hollow glass structure, the thermal conductivity of 3.17 ~ 3.59W/m2 · k · h is much lower than the ordinary aluminum alloy 6.69 ~ 6.84W/m2 · k · h, effectively reducing the heat transmitted through the doors and windows.
⊙ Anti-condensation: The temperature of the inner surface of the profile with heat-insulated bars is close to the room temperature, reducing the possibility that the room water will condense on the surface of the profile due to over-saturation.
⊙Energy saving: In winter, the window frame with thermal insulation strip can reduce 1/3 of the heat lost through the window frame; In summer, if there is air conditioning, the window frame with thermal insulation strip can be more Reduce energy loss more than ever ⊙ Protect the environment: Through the application of thermal insulation systems, energy consumption can be reduced while reducing environmental radiation due to air conditioning and heating.
⊙ Health: The exchange of heat between the human body and the environment depends on the temperature of the indoor air, the speed of air flow, and the temperature of the outdoor air. By adjusting the interior temperature of doors and windows so that it is not lower than 12 ~ 13 °C, has reached a more comfortable environment.
⊙ Reduce noise: The hollow glass structure with different thickness and the heat-insulating aluminum cavity structure can effectively reduce the resonance effect of the sound wave, prevent the transmission of sound, and can reduce the noise by more than 30 dB.
Colorful enamel color: The use of anodizing, powder coating surface treatment can produce RAL color more than 200 different colors of aluminum profiles, after rolling combination, so that insulating aluminum doors and windows produce indoor and outdoor different color two-color windows.
These doors are normally opened or closed manually using hands, although some of them close automatically. Most older and small European elevators from the 1950's to 1970's are using manual hinged door (similar to normal room doors), while the inside has a manual sliding scissor gate or often there is no door at all. For manual doors, sometimes the door can be spring loaded so the gate can't be left open, or the gate can automatically close when you press the button, and partly/completely close when the elevator gets to a floor. The inside door can also be a tubular gate, which is a gate that in many cases folds around the side of the cab when it is open (often called a barred gate by elevator enthusiasts, though this is likely not the actual term), and which can be automatic or manual.
These type of door is still used today, normally for smaller wheelchair lifts or home elevators. Some older freight elevators may have a horizontal or vertical manual doors. In some Asian countries, one may find an old freight elevators with manual accordion or scissor gate. Some old elevators may have a semi-manual doors a configuration of manual door outside and an automatic door inside.
Automatic doors are the standard type of doors found in modern days elevators which was introduced in 1887. Almost all the automatic doors are usually powered by a door operator installed on the elevator car. Those except manual door with automatic door opening/closing device and all the incline elevators with every independent door operator belongs with every single shaft doors and car doors.
