Cross-Flow Fan Wireless Charger Heat Dissipation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing wireless chargers with centrifugal fans suffer from poor heat dissipation due to skewed air flow, which can lead to reduced battery life and potential device damage, especially when the fan is far from the charging coil.
Innovation Solution
A wireless charger design incorporating a cross-flow fan with a cylindrical fan housing and radial air outlet extending along the width direction of the support portion, ensuring linear air propagation and effective heat dissipation across the charging area, even when the charging coil is positioned farther away from the fan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a centrifugal fan is used for heat dissipation, then the fan structure is simple and easy to manufacture, but the air flow becomes skewed and heat dissipation effectiveness is poor
Solution Approach 1:
The patent inverts the conventional centrifugal fan design by using a cross-flow fan configuration where air enters axially and exits radially, rather than the traditional radial inlet and axial outlet. This inversion of the flow path geometry fundamentally changes the air flow characteristics from skewed to linear, resolving the contradiction between structural simplicity and heat dissipation effectiveness
Solution Approach 2:
The patent changes the geometric parameters of the fan housing and blade arrangement to achieve cross-flow characteristics. Specifically, the fan housing is designed with a cylindrical shape and the blades are configured to guide air flow from the axial direction to the radial direction, transforming the air flow pattern while maintaining manufacturing feasibility
2Adaptability or versatility
If the fan is positioned far from the charging coil, then the structural layout is more flexible, but the heat dissipation effect deteriorates due to skewed air flow
Solution Approach 1:
By inverting the fan type from centrifugal to cross-flow, the patent enables effective heat dissipation even when the fan is positioned away from the charging coil. The linear air flow characteristic of the cross-flow fan compensates for the increased distance, allowing flexible structural layout without sacrificing thermal management performance
Solution Approach 2:
The cross-flow fan acts as an intermediary that transforms the air flow from skewed to linear, enabling heat dissipation effectiveness to be maintained or improved even when the fan is positioned at a distance from the heat source (charging coil). This intermediary function resolves the contradiction between layout flexibility and thermal performance
3Area of stationary object
If air flow is allowed to propagate longer distance, then heat dissipation coverage is improved, but the air flow becomes more skewed and less effective
Solution Approach 1:
The patent inverts the conventional approach by using a cross-flow configuration that inherently produces linear air flow. This inversion allows the air flow to propagate over longer distances without becoming skewed, as the cross-flow geometry naturally guides the air in a straighter path from inlet to outlet, simultaneously improving coverage and maintaining flow quality
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 cross-flow fan design enhances heat dissipation by allowing air to propagate over a longer distance in a straight line, effectively cooling both the device and the charger, thereby reducing the risk of damage and improving battery life.
Implementation Method 1
a cross-flow fan located over the charging base, having a fan air outlet extending along a width direction of the support portion, and configured to dissipate heat away from the device being charged and/or the wireless charger through exhaust air
Implementation Method 2
a charging coil disposed in the support portion and configured to charge the device
Data Source
AI summary
A wireless charger configured to charge a device includes: a charging base disposed at a lower portion of the vertical wireless charger; a support portion disposed over the charging base and configured to support the device being charged; a charging coil disposed in the support portion and configured to charge the device being charged; and a cross-flow fan disposed over the charging base, having a fan air outlet extending in a width direction of the support portion, and configured to dissipate heat away from the device being charged and/or the wireless charger through exhaust air. As such, a size of the vertical wireless charger in a length direction can be reduced, and the wind propagates in a straight line and covers a larger size of the wireless charger in the width direction, thereby improving heat dissipation and increasing wind propagation distance.