Elastic Gasbag Pressure Buffering in Immersion Cooling
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Solution Overview
Problem
Conventional immersion cooling systems face challenges with pressure rise due to volume expansion of non-conductive working media, requiring large and inflexibly installed exhaust valves that compromise heat dissipation performance, especially in board-level horizontal insertion frames.
Innovation Solution
The use of elastic gasbags within the non-conductive working medium to compress and reduce volume, buffering pressure rises through controlled volume decrease, determined by the formula ∑i>1N∇vi ≥ ∇V, ensuring the sum of gasbag volume decreases matches the volume expansion of the working medium.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an exhaust pressure relief valve is installed to control pressure rise from volume expansion of non-conductive working medium, then pressure safety is improved, but the valve requires large size and high position installation which limits installation flexibility and deteriorates heat dissipation performance
Solution Approach 1:
The patent changes the pressure control mechanism from a mechanical valve with fixed parameters to an elastic gasbag whose volume parameter dynamically adjusts according to pressure changes. The gasbag's elastic properties allow it to expand and contract in response to pressure variations, providing adaptive pressure relief without requiring specific installation positions or large sizes.
Solution Approach 2:
The patent uses pneumatic principles by introducing an elastic gasbag filled with gas to handle pressure control. The gasbag utilizes the compressibility and expandability of gas to buffer pressure rises, replacing the traditional mechanical exhaust valve with a pneumatic-based solution that offers superior installation flexibility and heat dissipation performance.
2Reliability
If an exhaust pressure relief valve is installed to control pressure rise, then pressure safety is improved, but heat dissipation performance is deteriorated due to air layer formation and reduced thermal contact
Solution Approach 1:
The elastic gasbag utilizes pneumatic properties to provide pressure relief while maintaining better thermal contact with the liquid cooling medium compared to traditional exhaust valves. The gasbag's flexible structure allows it to conform to available spaces without creating large air gaps, thereby reducing thermal resistance and improving heat dissipation efficiency.
Solution Approach 2:
The gasbag is constructed with flexible materials that allow it to adapt its shape and position within the cooling system. This flexibility enables the gasbag to maintain intimate contact with surrounding surfaces, minimizing air layer formation and reducing thermal resistance, thus improving heat dissipation performance while still providing pressure safety.
3Reliability
If a specialized exhaust valve is used to prevent pressure rise, then pressure control is improved, but device complexity increases due to additional specialized components
Solution Approach 1:
The patent simplifies the pressure control system by changing from a complex mechanical valve mechanism to a simple elastic gasbag. The gasbag's pressure control function is achieved through its inherent elastic properties and volume changes, eliminating the need for complex mechanical components, seals, and actuation mechanisms required by traditional exhaust valves.
Solution Approach 2:
The elastic gasbag provides self-regulating pressure control without requiring external control systems or complex mechanisms. When pressure rises, the gasbag automatically expands to accommodate the volume increase; when pressure decreases, it contracts. This self-service mechanism eliminates the need for specialized exhaust valves with complex control systems, thereby reducing device 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
This solution allows for flexible installation and improved cooling performance by effectively managing pressure and maintaining a stable temperature range, enhancing heat dissipation without exposing electronic devices to air layers that impede heat transfer.
Implementation Method 1
after heat generated by a heat source immersed in a non-conductive working medium is absorbed by the non-conductive working medium, a temperature of the non-conductive working medium increases and a volume of the non-conductive working medium expands
Implementation Method 2
a temperature of the non-conductive working medium increases and a volume of the non-conductive working medium expands
Implementation Method 3
a surface of the gasbag is elastic, and the gasbag is configured to reduce its volume when the gasbag is compressed by volume expansion of the non-conductive working medium
Implementation Method 4
the gasbag is configured to reduce its volume when the gasbag is compressed by volume expansion of the non-conductive working medium, so as to buffer a pressure rise in the system
Data Source
AI summary
Embodiments of the present invention provide an immersion cooling system, including: an electronic device, a non-conductive working medium, and one or more gasbags. The electronic device is immersed in the non-conductive working medium; the non-conductive working medium is configured to dissipate heat for the electronic device, and a volume of the non-conductive working medium expands as a temperature rises; and a surface of the gasbag is elastic, and the gasbag is configured to reduce its volume when the gasbag is compressed by volume expansion of the non-conductive working medium, so as to buffer a pressure rise in the system, where the pressure rise is caused by the volume expansion of the non-conductive working medium. With the immersion cooling system provided in the embodiments of the present invention, a gasbag is used in place of an exhaust valve, so that installation is more flexible and cooling performance of the system is further improved.