Single Oblique Grid Air Intake Box for Vehicle Ventilation
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Solution Overview
Problem
Current air intake boxes for motor vehicle ventilation systems require multiple grilles and complex assembly processes, leading to increased costs and acoustic differences between outside and recirculation air ventilation modes.
Innovation Solution
A simplified air intake box design featuring a single oblique grid crossing the pipe to separate air inlets and outlets, eliminating the need for separate grilles and allowing for a one-piece housing construction, with a flap for air distribution and a pulser control module window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If two separate grilles are installed for outside air inlet and recirculation air inlet, then protection against external agents is improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines two separate protective grilles into a single grille that serves both the outside air inlet and recirculation air inlet functions. This single grille is positioned to protect both air inlets simultaneously, reducing the number of parts from two to one and simplifying the housing structure while maintaining protection against external agents.
Solution Approach 2:
The single grille is designed to perform multiple functions: it protects both the outside air inlet and recirculation air inlet, and it is integrated into the housing structure to serve as both a protective element and a structural component. This multi-functional design eliminates the need for separate protective elements for each air inlet.
2Object-affected harmful factors
If two separate grilles and two-part housing assembly are used, then protection and air inlet functionality are ensured, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The patent merges the protective grille function with the housing structure by integrating the single grille directly into the housing during molding. This integration eliminates separate assembly steps for installing individual grilles and reduces the housing from two assembled parts to a single molded piece, significantly simplifying manufacturing and reducing costs.
Solution Approach 2:
The grille is pre-integrated into the housing structure during the molding process itself, rather than being added as a separate component afterward. This preliminary integration of the protective element into the main structure eliminates subsequent assembly operations and reduces manufacturing complexity.
3Object-generated harmful factors
If recirculation air inlet is oriented transversely to reduce acoustic differences, then acoustic performance is improved, but air flow path complexity increases
Solution Approach 1:
The patent uses a flap mechanism to segment and direct air flow from the single air inlet space to different outlets based on ventilation mode. The flap acts as a flow divider that separates outside air and recirculation air paths after they enter through the single inlet, managing the complex air flow paths through a simple mechanical segmentation device.
Data Source
Figure 1~3
AI summary
The invention relates to an air admission housing for a ventilation facility of a motor vehicle, comprising an outside air inlet (2), a recirculation air inlet (3), and a duct (8) for receiving the air from the outside air inlet (2) and the recirculation air inlet (3) and sending it via an outlet (9) to the ventilation facility of the motor vehicle. The housing (1) comprises a single grating (7) which crosses the duct (8), separating the assembly of the outside air inlet (2) and the recirculation air inlet (3) from the outlet (9) of the duct (8).