A thermally broken, airtight, energy-saving aluminum passive door

By combining multi-cavity thermally broken aluminum profiles, nylon thermal insulation strips, sealing strips, and high-strength structures, the thermal insulation, sealing, and strength issues of aluminum alloy doors are solved, achieving high airtightness and high energy-saving performance, making them suitable for high-rise buildings and extreme environments.

CN122304585APending Publication Date: 2026-06-30YANTAI JIAFENG ALUMINUM TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
YANTAI JIAFENG ALUMINUM TECH CO LTD
Filing Date
2026-05-11
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

Existing aluminum alloy doors suffer from problems such as insufficient thermal insulation performance, weak sealing performance, poor structural strength, and thermal bridging at installation nodes, making it difficult to meet the high airtightness and high energy efficiency requirements of passive buildings.

Method used

It adopts a multi-cavity thermally broken aluminum profile design, combined with nylon thermal insulation strips and high-density insulation materials, equipped with three sealing strips and a multi-point synchronous locking system, and is covered with a flame-retardant and heat-insulating wrapping layer on the outside. It uses high-strength aluminum alloy and steel lining structure, with fluorocarbon coating treatment on the surface, and optimized hardware accessories and glass components.

Benefits of technology

It achieves ultra-low heat transfer performance (K value ≤ 0.6 W/(m²·K), high airtightness (≥ 8 level) and high wind pressure resistance (≥ 8 level), making it suitable for high-rise buildings. It has excellent weather resistance and durability, and the sealing performance decays by less than 5%, meeting the passive building standards.

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Abstract

This invention discloses an energy-saving aluminum passive door with thermal break and high airtightness, belonging to the technical field of passive building doors. It includes a door frame and a door leaf, connected by a hinge assembly. Both the door frame and door leaf are constructed of multi-cavity thermally broken aluminum profiles. Each thermally broken aluminum profile comprises at least two layers of aluminum alloy profile body and a nylon thermal insulation strip disposed between the two layers, separating the internal cavities of the aluminum alloy profile body. The cavities of both the door frame and door leaf are filled with thermal insulation blocks. A continuously arranged circumferential sealing strip is provided on the contact surface between the door leaf and the door frame. The outer part of the door frame in contact with the building wall is covered with a flame-retardant and thermally insulating wrapping layer. This invention effectively blocks heat conduction paths and improves airtightness and structural strength through ultra-wide thermal break, multi-cavity insulation, and multi-seal structure, making it suitable for passive ultra-low energy buildings, zero-carbon buildings, and other fields.
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