Compact Access Point Top Heat Spreader for Cooling and EMI Shielding
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Solution Overview
Problem
Compact electronic devices, such as Wi-Fi access points, face challenges in efficient heat dissipation and airflow management due to their small, aesthetically pleasing form factors, which can lead to overheating and electromagnetic interference issues, especially with the increased power consumption of newer Wi-Fi technologies like Wi-Fi 6.
Innovation Solution
A compact electronic device design featuring a housing with hidden vents for air ingress and egress, a fan module integrated within the device, and a heat spreader that provides grounding and shielding, along with a layered airflow structure to separate intake and exhaust paths, ensuring efficient thermal management and electromagnetic compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the device size is reduced to achieve a compact form factor, then aesthetic appeal and space efficiency are improved, but heat dissipation capability deteriorates
Solution Approach 1:
The patent combines multiple functions into the heat spreader component: it serves as both a thermal management device (heat spreader) and an electromagnetic shielding component. This integration allows the compact device to maintain effective heat dissipation and EMI protection without adding separate components that would increase device volume.
Solution Approach 2:
The heat spreader is designed to perform multiple functions simultaneously: thermal conduction/spreading, electromagnetic shielding, and grounding. This multi-functionality resolves the contradiction by eliminating the need for separate components, thereby maintaining compact device size while ensuring adequate heat dissipation capability.
2Power
If power consumption is increased to support Wi-Fi 6 technology, then transmission speed and channel capacity are improved, but heat generation increases
Solution Approach 1:
The patent converts the harmful effect of increased heat generation (from higher power consumption) into a manageable challenge by implementing an integrated thermal management system. The heat spreader efficiently distributes the generated heat across a larger area, and the grounding contacts provide additional thermal pathways, allowing the device to handle Wi-Fi 6 power levels without overheating.
Solution Approach 2:
The patent changes thermal management parameters by using die-cast aluminum with nickel plating for the heat spreader, which provides superior thermal conductivity compared to traditional heat sinks. This material parameter change enables effective heat dissipation at higher power consumption levels required for Wi-Fi 6 operation.
3Temperature
If traditional heat sinks are used for individual components, then heat dissipation is improved, but device complexity and space requirements increase
Solution Approach 1:
The patent merges multiple individual heat dissipation functions into a single integrated heat spreader structure. Instead of placing separate heat sinks on each component, the die-cast aluminum heat spreader provides a unified thermal management solution that reduces component count and simplifies the overall device architecture.
Solution Approach 2:
The integrated heat spreader serves as a universal thermal management component that replaces multiple individual heat sinks. It provides grounding and EMI shielding in addition to heat dissipation, thereby reducing device complexity while maintaining effective heat management across all components.
4Temperature
If ventilation openings are added for heat dissipation, then cooling efficiency is improved, but aesthetic appearance deteriorates
Solution Approach 1:
The patent extracts the ventilation function from visible external openings and relocates it to the base portion of the device, which is not visible when the device is mounted. The cooling air intake openings are positioned in the base, allowing effective cooling while maintaining a clean aesthetic appearance of the main device body.
Solution Approach 2:
The patent moves the ventilation openings from the visible vertical surfaces to the horizontal base portion, utilizing a different spatial dimension that is hidden during normal operation. This allows the device to maintain aesthetic appearance while providing adequate cooling pathways.
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 effectively dissipates heat and manages airflow without increasing device size, maintaining a compact form factor while reducing noise and electromagnetic interference, supporting higher power consumption without the need for faster fan speeds.
Implementation Method 1
Heat sinks are commonly used for individual electrical components, these individual heat sinks are typically passive devices that operate using thermal conduction to transfer heat from the electrical components such as chipsets located on a Printed Circuit Board (PCB) to the heat sink
Implementation Method 2
The heat transferred to the heat sink can be dissipated inside the compact electronic device passively or can be dissipated and exhausted more effectively by cooling fan(s) which use the principal of thermal convection forcing cooler air across the heat sink
Implementation Method 3
The heat spreader is configured to provide grounding and shielding for the plurality of electrical components
Data Source
AI summary
Compact electronic devices, such as Access Points (APs), having airflow and cooling features are provided. According to one implementation, a compact electronic device including a housing having an interior and a plurality of vents for air ingress and egress. The plurality of electrical components located in the interior of the electronic device and a heat spreader located in the interior, disposed above the plurality of components and connected to the plurality of vents for the air ingress and egress. The heat spreader being configured to provide grounding and shielding for the plurality of electrical components and wherein the heat spreader includes chamber formed therein for supporting a fan module. The compact electronic device further comprises of a plurality of antennas for a plurality of frequencies, where the antennas are any of disposed within and formed as part of the house of the heat spreader.