Immersion cooling system

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Solution Overview

Problem

Existing immersion cooling systems face challenges in balancing operating costs and heat dissipation performance due to limited flow rates and high viscosity of cooling liquids, leading to insufficient cooling capacity and increased energy consumption when using high-speed pumps.

Innovation Solution

The system incorporates a pressure seal tank with a blower and distributor plate to enhance gas circulation, forming uniform bubbles that increase the fluidity of the cooling liquid, thereby improving heat dissipation without increasing energy costs.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If a highspeed or large-capacity pump device is used to increase the fluidity of the cooling liquid, then the cooling capacity is improved, but the operating costs and energy consumption increase

Engineering Contradiction:
Improvecooling capacityVSAvoidenergy consumption
Core Design Contradiction:
TemperatureVSUse of energy by moving object

Solution Approach 1:

The patent replaces the traditional pump-driven mechanical circulation system with a gas circulation system. Gas is injected into the pressure seal tank to create gas-liquid two-phase flow, which naturally drives the cooling liquid circulation without requiring high-power pump devices, thus reducing energy consumption while maintaining cooling capacity

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces gas injection into the cooling liquid system to create pneumatic-hydraulic interaction. The gas bubbles rise through the cooling liquid, creating upward flow and convection currents that enhance fluidity and heat transfer efficiency without mechanical pumping

Inventive Principle:
Principle #29Pneumatics and hydraulics

2Temperature

If the flow area for cooling liquid is increased, then the cooling capacity is improved, but the device complexity and space requirements increase

Engineering Contradiction:
Improvecooling capacityVSAvoidsystem complexity
Core Design Contradiction:
TemperatureVSDevice complexity

Solution Approach 1:

The patent changes the physical state parameters of the cooling system by introducing gas phase into the liquid cooling system. This creates a two-phase flow system where gas bubbles dispersed in the cooling liquid significantly enhance heat transfer coefficients and fluidity without requiring larger flow areas or more complex piping structures

Inventive Principle:
Principle #35Parameter changes

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 solution enhances the cooling efficiency of electronic modules by increasing the flow rate of the cooling liquid, reducing maintenance costs, and maintaining optimal operating conditions through controlled gas circulation and liquid distribution.

Implementation Method 1

The blower is communicated with the pressure seal tank and configured to extract the gas from the gas outlet and inject the gas into the pressure seal tank via the gas inlet

Methodology Applied
Scientific EffectGas circulation: Convection

Implementation Method 2

distributor plate disposed in the pressure seal tank... located between the electronic module and the gas inlet

Methodology Applied
Scientific EffectBubble distribution: Aeration

Implementation Method 3

The electronic module is disposed in the pressure seal tank and immersed in the cooling liquid

Methodology Applied
Scientific EffectConvection cooling: Convection

Data Source

PatentEP4358664B1Immersion cooling system
Publication Date: 2026.05.06 DELTA ELECTRONICS INC(CN)
  • EP4358664B1 patent drawingFigure 1
  • EP4358664B1 patent drawingFigure 2
  • EP4358664B1 patent drawingFigure 3

AI summary

An immersion cooling system (100) is provided. It includes a pressure seal tank (110), an electronic module (120), a blower (193), and a distributor plate (194). The pressure seal tank (110) contains a cooling liquid (115), and a gas outlet (191) is disposed on the top or a sidewall of the pressure seal tank, a gas inlet (192) is disposed on the bottom of the pressure seal tank. The gas outlet (191) is higher than the liquid level of the cooling liquid. The electronic module (120) is disposed in the pressure seal tank (110) and immersed in the cooling liquid (115). The blower (193) is communicated with the pressure seal tank (110) and configured to extract the gas from the gas outlet (191) and inject the gas into the pressure seal tank via the gas inlet (192). The distributor plate (194) is disposed in the pressure seal tank (110) and located between the electronic module (120) and the gas inlet (192).