Heat Dissipation Base Plate Clamping for Even Contact Pressure
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Solution Overview
Problem
Conventional heat dissipation systems face challenges in ensuring even contact and force distribution between heat sinks and heat sources, particularly with high-performance chips, leading to thermal resistance and potential damage due to uneven fastening and excessive pressure.
Innovation Solution
A structure comprising a heat dissipation base plate with through bores at corners and a central hold-down member, along with an adjustment element featuring a screw bolt and turning knob, allows for evenly distributed downward forces and adjustable bonding strength, ensuring full contact and preventing damage to the heat source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If screw fasteners are quickly and fully tightened at all corners simultaneously, then productivity is improved, but manufacturing precision deteriorates due to uneven force distribution and inability to ensure proper contact
Solution Approach 1:
The fastening process is segmented into two distinct stages: first fixing the heat dissipation base plate at four corners using screw fasteners, then applying additional downward force at the center area using a hold-down member with adjustment element. This segmentation allows each stage to serve its specific purpose without compromising the other.
Solution Approach 2:
The screw fasteners are used to perform preliminary fixing at the four corners first, establishing basic positioning and connection. Then the hold-down member is used to apply additional center area pressure, ensuring complete contact between the base plate and heat source without requiring sequential corner tightening.
2Reliability
If excessive downward force is applied to ensure tight contact, then heat transfer performance is improved, but reliability deteriorates due to potential damage to the heat source
Solution Approach 1:
Different parts of the heat dissipation base plate are subjected to different forces: the four corners are fixed by screw fasteners while the center area receives additional downward force from the hold-down member. This local differentiation ensures complete contact without concentrating excessive force at any single point that could damage the heat source.
Solution Approach 2:
The adjustment element with turning knob provides a mechanism to control and limit the downward force applied by the hold-down member, preventing excessive force that could damage the heat source while ensuring sufficient contact pressure for effective heat transfer.
3Manufacturing precision
If sequential tightening of screw fasteners is performed to ensure even force distribution, then manufacturing precision is improved, but productivity deteriorates due to manual handling and adjustment requirements
Solution Approach 1:
The function of applying center area pressure is extracted from the corner fastening operation and implemented separately through the hold-down member. This allows corner fasteners to be installed quickly without sequential tightening requirements, while the hold-down member independently ensures even force distribution across the base plate.
4Device complexity
If heat sink is fixed only at four corners, then device complexity is reduced, but manufacturing precision deteriorates due to arched deformation in central area
Solution Approach 1:
The solution merges two fastening approaches: corner fastening via screw fasteners and center area pressure application via hold-down member. This combination maintains relative structural simplicity while ensuring the heat dissipation base plate contacts the heat source across its entire surface, preventing arched deformation in the central area.
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
This solution enables effective heat transfer by ensuring all areas of the heat dissipation base plate are in tight contact with the heat source, reducing thermal resistance and protecting the heat source from excessive pressure, thereby enhancing heat transfer performance.
Implementation Method 1
the screw bolt is correspondingly extended through the first and second threaded holes, and the turning knob is operable to turn the screw bolt of the adjustment element to thereby force the hold-down member to apply evenly distributed downward forces
Implementation Method 2
Heat transfer element and heat dissipation element are a commonly seen combination for contacting with a heat source and transferring heat from the heat source to a remote location for dissipating into ambient air
Data Source
AI summary
A structure for evenly applying forces on a heat dissipation base plate includes a heat dissipation base plate having upper and lower surface, a first threaded hole, and through bores provided at four corners thereof, and being held in place on a heat source by screw fastening elements extended through the through bores for the lower surface to contact with the heat source; a hold-down member disposed on the upper surface of the heat dissipation base plate and having upper and lower side and a second threaded hole extending from the upper to the lower side; and an adjustment element including a screw bolt and a turning knob connected to the screw bolt, the screw bolt being extended through the first and second threaded holes, and turnable by the screw bolt to downward press against and apply evenly distributed forces on a central area of the heat dissipation base plate.