Phase-Change Heat Dissipation Structure for Compact MIMO Antennas
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Solution Overview
Problem
Current heat dissipation systems for MIMO antennas are inefficient in quickly dissipating heat due to their mechanical air-cooled design, leading to increased size and complexity.
Innovation Solution
A heat dissipation device with a refrigerant-based system that includes a first chamber for heating elements, a second chamber for refrigerant injection and condensation, and a heat transfer part with evaporation-inducing ribs to enhance heat exchange, utilizing a blower to improve condensation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a mechanical air-cooled heat dissipation structure is used, then the device structure is simple, but the heat dissipation speed is slow and device size increases
Solution Approach 1:
The patent replaces the mechanical air-cooled heat dissipation system with a refrigerant-based phase change system. The refrigerant circulates through closed channels, absorbing heat from the heating element through evaporation and dissipating it through condensation, thereby substituting mechanical convection with phase change thermodynamics to achieve faster heat dissipation in a compact form
Solution Approach 2:
The patent utilizes phase transitions of the refrigerant (evaporation from liquid to vapor at the heating element, and condensation from vapor to liquid at the heat dissipation fin) to enable rapid heat absorption and release. This phase change mechanism allows for high-speed heat dissipation without requiring large device volume
2Productivity
If the number of heat dissipation structures is increased to quickly dissipate heat, then heat dissipation performance improves, but device complexity and size increase
Solution Approach 1:
The patent merges the heat dissipation function into the existing antenna structure by integrating refrigerant channels within the antenna element and housing. The heat dissipation fin is combined with the antenna housing, and the refrigerant circulation system is integrated into the overall device structure, thereby achieving high heat dissipation efficiency without increasing structural 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 system effectively and quickly dissipates heat from MIMO antennas by evaporating and condensing refrigerant, improving heat dissipation performance without increasing size or complexity.
Implementation Method 1
quickly dissipate the heat generated by the heating element (31) by injecting the refrigerant (R) to one side of a space in which the heating element (31) is disposed and quickly evaporating the injected refrigerant (R)
Implementation Method 2
the refrigerant (R) injected by the injection part (83) is evaporated while being adsorbed to the plurality of evaporation-inducing ribs (15)
Implementation Method 3
a condensing part (140) configured to condense the refrigerant (R) injected into the second chamber (C2)
Implementation Method 4
a heat transfer part (110) disposed between the first chamber (C1) and the second chamber (C2) and configured to receive heat from the heating elements (31) of the first chamber (C1) and supply the heat to the second chamber (C2)
Data Source
AI summary
A heat dissipation device for an electronic element includes a first chamber containing a printed circuit board with heating elements, and a second chamber for heat exchange. The second chamber contains a refrigerant injection part and supply part. A heat transfer part between the chambers receives heat from the heating elements and transfers it to the second chamber. A condensing part condenses injected refrigerant. The heat transfer part has evaporation-inducing ribs on its surface exposed to the second chamber, allowing injected liquid refrigerant to be adsorbed and flow downward in a zigzag pattern. This configuration enables efficient heat dissipation through phase changes of the refrigerant as it evaporates and condenses. The device may also include features like specially-shaped condensation ribs, a blower part to improve condensation, and a pressure regulator for the second chamber. This design provides improved heat dissipation performance without increasing device size.