Thermally Insulated Composite Door Handle Profile
Solution Overview
Problem
Existing door and window handle designs compromise the structural integrity and thermal insulation due to their integration with the door or window, leading to potential detachment and poor thermal performance.
Innovation Solution
A thermally insulated composite handle profile with a recessed grip design, made of metallic partial profiles connected by insulating bars, which distributes actuation forces effectively and maintains rigidity, while also allowing for standardization with various fillings and optional lighting features.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the handle is integrated into the door or window structure, then the handle can be firmly attached, but the door's statics are adversely affected and thermal insulation is compromised
Solution Approach 1:
The patent introduces an intermediary connection system where the handle profile connects to the sash composite profile through dedicated connection elements that distribute forces. The handle profile acts as a mediator between the user's actuating force and the sash structure, preventing direct stress concentration that would compromise door statics.
Solution Approach 2:
The handle profile is constructed as a composite structure with a metallic outer profile providing strength and a thermal insulating inner profile reducing thermal conductivity. This composite design allows the handle to maintain structural integrity for force transmission while minimizing the thermal bridge effect through the handle insertion.
2Strength
If the handle profile is made of metallic material for strength, then the handle has high rigidity, but thermal bridge effects increase and thermal insulation deteriorates
Solution Approach 1:
The handle profile employs a composite construction with a metallic outer profile (aluminum or steel) providing mechanical strength and rigidity, while an inner thermal insulating profile (foam plastic or similar material) reduces thermal conductivity. This composite structure minimizes the thermal bridge effect while maintaining the necessary mechanical properties for handle functionality.
Solution Approach 2:
The metallic material is concentrated in the outer profile where mechanical strength is needed for force transmission, while the inner core uses thermal insulating material where thermal conductivity should be minimized. This local differentiation of material properties optimizes both structural and thermal performance.
3Reliability
If the grip strip is embedded in insulating material, then the handle can be attached to the sash, but the rigidity of the grip strip decreases and bending moments cause connection failure
Solution Approach 1:
The handle profile uses a composite structure where the metallic outer profile provides the necessary rigidity and strength to resist bending moments, while the thermal insulating inner profile provides the connection interface to the sash composite profile. This composite design prevents the rigidity loss that would occur if the entire handle were made of soft insulating material.
Solution Approach 2:
The handle profile is segmented into distinct functional zones: the metallic outer profile handles mechanical loading and force transmission, while the inner thermal insulating profile handles thermal isolation and connection to the sash. This segmentation allows each material to perform its optimal function without compromising the other.
Data Source
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AI summary
A door (1) or window with a sash frame (2) and a frame (3), wherein the sash frame (2) has sash frame mullions (4, 5, 6, 7), wherein the sash frame mullions (4, 5, 6, 7) together with a panel (11) form a sash (12) and the sash (12) further comprises at least one handle profile (300), wherein the handle profile (300) is preferably arranged parallel to one of the sash frame mullions (4, 5, 6, 7), is characterized in that the handle profile (300) is fixed to a sash frame composite profile (100).