Grill Shutter Inner Outer Frame Air Guidance
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Solution Overview
Problem
Existing grill shutter devices face challenges in effectively supplying air to cooling objects in vehicles due to the placement of guide members, which either hinder the movement of the cover or result in air diffusion before reaching the cooling device.
Innovation Solution
A grill shutter device design featuring an inner and outer frame with strategically positioned air introduction ports and a lattice-shaped rib, which directs air flow effectively to the cooling object while minimizing diffusion and foreign matter intrusion, and improves the appearance quality and cooling performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a guide member is disposed in the vicinity of the opening portion to guide air to the cooling object device, then air guidance effectiveness is improved, but the movement of the cover between open and closed states is hindered
Solution Approach 1:
The frame is divided into an inner frame and an outer frame, with the inner frame having a rear side air introduction port and the outer frame having a front side air introduction port. This segmentation allows air to be guided effectively through the inner frame while the outer frame provides structural support without interfering with cover movement.
Solution Approach 2:
The air introduction ports are positioned at different depths (front side and rear side) rather than at the same location. This dimensional separation allows the guide member to be effective while maintaining clear movement trajectory for the cover.
2Ease of operation
If the guide member is disposed at a position away from the movement trajectory of the cover to avoid hindering movement, then cover movement is improved, but air taken in from the opening portion diffuses before reaching the guide member
Solution Approach 1:
The frame structure is segmented into inner and outer frames with air introduction ports at different positions. The inner frame's rear side air introduction port is positioned to receive air effectively while the outer frame's front side port is positioned away from the cover movement trajectory, resolving the contradiction between air guidance and movement freedom.
3Shape
If the fin is disposed to open and close the opening portion with surface continuity for aesthetic purposes, then appearance quality is improved, but air flow control and guidance become more difficult
Solution Approach 1:
The frame is segmented into inner and outer frames that work together to control air flow. The inner frame with its rear side air introduction port provides effective air guidance while the outer frame maintains aesthetic appearance, allowing both air flow control and appearance quality to be achieved.
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
The design ensures effective air supply to the cooling object, enhances appearance quality, and improves cooling performance by reducing air diffusion and foreign matter intrusion, while maintaining the aesthetic continuity of the vehicle's design surface.
Implementation Method 1
air is taken in from the opening portion and flows to the cooling object device through the front side air introduction port of the outer frame and the rear side air introduction port of the inner frame
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A grill shutter device (10) includes an opening portion (24) positioned in a vehicle front portion, a fin (26) configured to open and close the opening portion (24), and a frame (28) configured to hold the fin (26). The frame (28) has an inner frame (28B) and an outer frame (28A). The inner frame has a rear side air introduction port (28BH) open toward the cooling object device (36). The outer frame (28A) has a front side air introduction port (28AE) positioned in front of the inner frame (28B) and open toward the rear side air introduction port (28BH) at a position corresponding to the opening portion (24). The inner frame (28B) has a first wall portion covering the fin (26) from a vehicle rear side in an open state where the fin (26) opens the opening portion (24). The outer frame (28A) has a second wall portion covering the fin (26) from the vehicle front side in the open state where the fin (26) opens the opening portion (24).