Liquid Cooling CDU Switching Between Positive and Negative Pressure
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Solution Overview
Problem
Conventional liquid cooling systems face issues with poor working stability, complex maintenance, and easy coolant leakage due to the use of vacuum pumps and negative pressure systems with intricate structures, leading to reliability concerns and high maintenance difficulties.
Innovation Solution
A liquid-cooled circulating liquid supply system with a basic and negative pressure circulation mode, utilizing a switching assembly to control the connection between a basic circulating liquid supply device and a negative pressure circulating liquid supply device, allowing operation under positive or negative pressure, and incorporating a negative pressure generating assembly to regulate pressure in a liquid tank, ensuring reliable coolant circulation and leakage prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a vacuum pump is used to provide constant suction force to regulate liquid supply pressure and flow in a negative pressure cooling system, then coolant leakage is prevented, but the system structure becomes complex and maintenance becomes extremely difficult
Solution Approach 1:
The system is divided into a negative pressure generation unit (vacuum pump), a switching unit (electromagnetic valve), and a circulation unit (pump). This segmentation allows each component to perform its specific function independently, making the overall complex system manageable and maintainable through modular replacement and repair of individual units.
Solution Approach 2:
An electromagnetic valve is introduced as an intermediary component between the vacuum pump and the circulation system. This intermediary enables controlled switching between negative pressure mode and normal pressure mode, allowing the system to transition states and facilitating maintenance by isolating different functional segments.
2Reliability
If a vacuum pump is used to provide constant suction force to regulate liquid supply pressure and flow, then coolant leakage is prevented, but component maintenance becomes extremely difficult
Solution Approach 1:
The system is divided into a negative pressure generation unit (vacuum pump), a switching unit (electromagnetic valve), and a circulation unit (pump). This segmentation allows each component to perform its specific function independently, making the overall complex system manageable and maintainable through modular replacement and repair of individual units.
Solution Approach 2:
The system dynamically switches between negative pressure operation mode and normal pressure maintenance mode using an electromagnetic valve. This dynamic capability allows the system to operate in negative pressure for leakage prevention, then transition to normal pressure for easier maintenance and component replacement without requiring complete system disassembly.
3Reliability
If only a vacuum pump is used to provide constant suction force to regulate liquid supply pressure and flow, then negative pressure is maintained, but system reliability is poor because if a component fails the entire system cannot operate
Solution Approach 1:
The system dynamically switches between negative pressure operation mode and normal pressure maintenance mode using an electromagnetic valve. This dynamic capability allows the system to operate in negative pressure for leakage prevention, then transition to normal pressure for easier maintenance and component replacement without requiring complete system disassembly.
Solution Approach 2:
The system changes the pressure parameter from negative pressure to normal atmospheric pressure by controlling the electromagnetic valve state. This parameter change enables the system to adapt between different operational requirements: negative pressure for safe coolant containment and normal pressure for maintenance operations, thereby improving overall system reliability and flexibility.
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 reduces maintenance complexity, improves reliability, and prevents coolant leakage while maintaining system stability, with the ability to operate normally even if one component fails, and enhances dynamic response speed through self-adjusting correction and closed-loop control.
Implementation Method 1
the negative pressure generating assembly is configured to regulate the pressure in an accommodating chamber inside the liquid tank to a negative pressure
Implementation Method 2
the circulation pump drives a coolant to circulate and exchange heat under a positive pressure along a pipeline between a position to be cooled and the heat exchanger
Implementation Method 3
the circulation pump drives a coolant to circulate and exchange heat under a positive pressure along a pipeline between a position to be cooled and the heat exchanger
Data Source
Figure 1
AI summary
The present invention provides a circulating liquid supply system for liquid cooling and a circulating liquid supply method for liquid cooling. The circulating liquid supply system for liquid cooling comprises: a basic circulating liquid supply device comprising a heat exchanger and a circulation pump which are communicated through a pipe; a negative-pressure circulating liquid supply device comprising a liquid tank and a negative-pressure generation component which are communicated through a pipe; and a switching assembly. The circulating liquid supply system for liquid cooling has a basic circulation mode and a negative-pressure circulation mode; in the basic circulation mode, the circulation pump drives a cooling liquid to perform circulating heat exchange between a position to be cooled and the heat exchanger under a positive pressure along the pipe; and in the negative-pressure circulation mode, the negative-pressure generation component drives the cooling liquid to perform circulating heat exchange between said position and the heat exchanger under a negative pressure along the pipe. According to the present invention, the basic circulating liquid supply device can be used independently as a conventional positive-pressure CDU, and can also be used in combination with the negative-pressure circulating liquid supply device to be used as a negative-pressure CDU.