Air Knife Discharge Slot Width Control
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Solution Overview
Problem
Conventional air knife designs often require stiffening brackets that are fastened to the exterior, leading to increased production costs and potential bacterial growth in food and beverage applications, while also not effectively maintaining a consistent discharge slot width.
Innovation Solution
The air knife system incorporates a main body with first and second sets of openings along opposite walls, where coupling members are inserted and fixedly joined using a welding process, such as TIG welding, to maintain a desired width of the discharge slot, reducing the need for external brackets and minimizing crevices for bacterial growth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If stiffening brackets are fastened to the exterior of the air knife, then structural stability is improved, but device complexity and production costs increase
Solution Approach 1:
The patent integrates the stiffening function directly into the housing structure by forming ribs within the housing cavity that extend toward the discharge slot. This merging of structural support and housing functions eliminates the need for separate external stiffening brackets, thereby reducing device complexity while maintaining structural stability.
Solution Approach 2:
The patent embeds stiffening ribs inside the housing cavity, nesting the structural support elements within the existing housing structure. This allows the stiffening function to be incorporated without adding external components, reducing overall device complexity while maintaining the required structural integrity.
2Stability of the object's composition
If stiffening brackets are fastened to the exterior of the air knife, then structural stability is improved, but bacterial growth risk increases due to additional crevices
Solution Approach 1:
By merging the stiffening function into the housing structure itself through internally formed ribs, the patent eliminates external brackets that would create additional crevices and hard-to-clean areas. This reduces surfaces that could harbor bacteria while maintaining the necessary structural stability.
Solution Approach 2:
The patent extracts the stiffening function from external brackets and relocates it to internal housing ribs. This removal of external components eliminates the crevices and attachment points that would otherwise promote bacterial growth, while the internal ribs provide equivalent structural support.
3Manufacturing precision
If coupling members are welded to maintain discharge slot width, then manufacturing precision is improved, but production time increases due to welding process
Solution Approach 1:
The patent incorporates stiffening ribs and coupling member positioning features into the housing during the initial housing formation process (such as injection molding or extrusion). This preliminary action establishes the discharge slot width and structural integrity before final assembly, ensuring manufacturing precision without requiring time-consuming welding operations during assembly.
Solution Approach 2:
The patent replaces the welding process with mechanical interference fits or snap-fit connections between coupling members and housing features. This substitution maintains the precision of discharge slot width while dramatically reducing production time by eliminating the thermal process and cooling requirements associated with welding.
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 design enhances sanitation in food and beverage applications by reducing parts and costs, while maintaining a consistent discharge slot width for efficient air flow, improving the air knife's performance and manufacturing efficiency.
Implementation Method 1
The coupling members may be joined to the first and second sets of openings using a welding process
Data Source
AI summary
An air knife system includes a first set of openings and a second set of openings arranged along opposite first and second walls, respectively, of a main body. The first set of openings may be aligned with the second set of openings such that a coupling member may be inserted through each one of the first set of openings and a corresponding one of the second set of openings. The coupling members may be fixedly joined to the first and second sets of openings to maintain a desired width of a discharge slot defined by a first lip extending from the first wall and a second lip extending from the second wall. In one embodiment, the coupling members may be joined to the first and second sets of openings using a welding process.