Door assembly, air handling unit comprising such a door assembly, and method for manufacturing such a door assembly
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Solution Overview
Problem
Existing door assemblies for air handling units are costly to manufacture and assemble, requiring precise tapered surfaces for effective insulation and leakage prevention, which complicates the assembly process.
Innovation Solution
The door assembly features frame beams and edge beams with beveled portions, allowing for efficient insulation and leak-proofing when the swing door is closed, and can be manufactured using the same machine, simplifying the production and assembly process by using beams with identical cross-sections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If tapered surfaces are used for door and jamb to ensure planar contact and effective insulation, then thermal insulation and leakage prevention are improved, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent changes the geometric parameters of the door assembly by replacing tapered surfaces with beveled portions at specific angles (e.g., 45 degrees). This parameter change allows the door leaf and frame to form an angled contact surface that achieves planar contact without requiring complex tapered geometry, thereby maintaining thermal insulation while simplifying manufacturing and assembly
Solution Approach 2:
Instead of tapering the door and jamb surfaces to achieve contact, the patent inverts the approach by using beveled portions that create an angled contact surface. The beveled portion on the door leaf contacts the beveled portion on the frame at a specific angle, achieving the same insulation effect through an inverted geometric approach that is easier to manufacture
2Reliability
If tapered surfaces are used for door and jamb to ensure planar contact, then thermal insulation is improved, but manufacturing cost increases
Solution Approach 1:
The patent simplifies manufacturing by changing the geometric parameters from complex tapered surfaces to beveled portions with standard angles (e.g., 45 degrees). These beveled portions can be produced using standard machining operations on common equipment, reducing manufacturing cost while maintaining the thermal insulation function through proper angular contact
3Reliability
If precise assembly of tapered surfaces is performed to ensure planar contact, then air leakage prevention is improved, but assembly difficulty increases
Solution Approach 1:
The patent changes the assembly parameters by using beveled portions with predetermined angles that naturally guide the door leaf into proper alignment with the frame. The angled contact surfaces provide self-aligning geometry that ensures planar contact and air leakage prevention without requiring precise manual adjustment during assembly
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This solution reduces manufacturing costs and simplifies assembly while maintaining effective thermal insulation and preventing air leakage, ensuring efficient operation of air handling units.
Implementation Method 1
the frame beam and edge beam have appropriate beveled portions for insulating when the swing door is in the closed position
Implementation Method 2
preventing air leakage
Data Source
AI summary
This door assembly (29) comprises a frame (31), extending along a frame plane (P1) and comprising: at least one frame beam (35) defining a frame axis (X35) along the frame plane, the frame beam comprising a main body (39) elongated along the frame axis and having a substantially constant cross-section (S39) along said frame axis, the main body comprising a beveled portion (55) inclined relative to the frame plane; and a swing door (33), pivotably secured to the frame between an opened position and a closed position, said swing door comprising at least one edge beam (63) comprising a main body (139) elongated along an edge axis (X63) of the edge beam and having a substantially constant cross-section (S139) along said edge axis, the main body comprising a beveled portion (155) which is brought to rest against the beveled portion of the frame beam when the swing door is brought to the closed position, wherein the cross-section (S39) of the main body (39) of the frame beam (35) is identical to the cross-section (S139) of the main body (139) of the edge beam (63).