Base Station Heat Sink Fins with Baffles for Natural Convection
Solution Overview
Problem
Outdoor communications base stations face inefficient heat dissipation, particularly in environments with solar radiation but no wind, leading to reduced efficiency and coverage area due to high temperatures, as existing heat sink fins struggle to effectively dissipate heat in cascaded installations.
Innovation Solution
A heat dissipation apparatus with strategically positioned heat sink fins and baffles that create a turbulent airflow, enhancing heat exchange by circulating air between fins and deepening penetration into the heat sink dedendum, thereby improving heat dissipation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If natural environment heat dissipation is used, then the structure is simple, but heat dissipation efficiency is low especially when there is solar radiation but no wind
Solution Approach 1:
The heat dissipation apparatus is divided into multiple heat sink fins arranged in parallel, creating multiple channels for air flow. This segmentation increases the total heat dissipation surface area and allows better utilization of natural convection currents, resolving the contradiction between simple structure and effective heat dissipation.
Solution Approach 2:
The patent introduces a vertical dimension to heat dissipation by arranging heat sink fins vertically and utilizing natural convection currents that rise upward. This dimensional approach allows heat dissipation to occur along the vertical axis, improving efficiency without requiring complex mechanical structures or additional power consumption.
2Temperature
If heat sink fin is disposed on external side of module, then heat dissipation surface area is increased, but in cascaded installation scenario cold air cannot flow into the heat sink fin
Solution Approach 1:
The heat sink fins are designed with varying characteristics along their length, with the lower portions having different geometric properties than the upper portions. This local differentiation optimizes air flow distribution, allowing cold air to effectively reach and cool the fins even in cascaded installations where space is constrained.
Solution Approach 2:
Instead of relying on horizontal air flow that is blocked in cascaded installations, the patent inverts the approach by designing the heat sink fins to utilize vertical natural convection currents. The fins are positioned and shaped to capture rising hot air and draw in replacement cold air from below, effectively working against the conventional horizontal cooling assumption.
3Temperature
If air circulation is enhanced by baffle, then turbulent flow and heat exchange are improved, but device complexity increases
Solution Approach 1:
The baffle is designed to work passively with natural convection currents, utilizing the existing thermal buoyancy forces to generate turbulent flow and enhance heat exchange. No external power source or active control mechanism is required - the baffle simply redirects the naturally occurring air flow to improve its own heat dissipation performance, resolving the contradiction between enhanced heat exchange and increased complexity.
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 apparatus effectively reduces heat and maintains optimal operating temperatures for base station modules, enhancing heat dissipation efficiency and preventing airflow escape, thus maintaining performance and coverage area.
Implementation Method 1
air at a bottom of the base station module absorbs heat emitted by the heat dissipation apparatus, circulates and rises along a spacing between neighboring first heat sink fins
Implementation Method 2
the air forms a turbulent flow in the circulation process, and deeply penetrates into a first dedendum of a first heat sink fin, thereby enhancing an effect of heat exchange
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The present invention provides a heat dissipation apparatus, including: a housing, where the housing is configured to accommodate an electrical element, at least two first heat sink fins protruding outwards are disposed at intervals on an outer surface of the housing, a passageway for airflow circulation is formed between the two neighboring first heat sink fins, each first heat sink fin includes a first dedendum and a first addendum, and the first dedendum of each first heat sink fin is connected to the housing; and a baffle, where a first surface of the baffle is connected to first addendums of the two or more first heat sink fins and stretches across the at least one passageway. The heat dissipation apparatus in the present invention may be disposed on an external side of a base station module of a communications base station. A first heat dissipation module and a second heat dissipation module are disposed to absorb heat of the housing and dissipate the heat, thereby enhancing an effect of heat exchange between the heat dissipation apparatus and external cold air.