Liquid Cooling Rear Door with Dynamic Flow Control

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Solution Overview

Problem

Conventional cooling equipment for server racks generates hot air currents, which burden the air conditioning system and lead to increased power consumption, as existing systems are inefficient in dissipating heat generated by servers.

Innovation Solution

A smart flow rate control system that includes a cabinet with a liquid cooling rear door and pipeline, a temperature sensing device, and a flow rate control device. This system automatically adjusts the flow rate of the cooling liquid based on temperature readings to minimize hot air generation and optimize heat dissipation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If liquid cooling devices are used to augment heat dissipation, then heat removal efficiency is improved, but hot air current is still generated and burdens the air conditioning system

Engineering Contradiction:
Improveheat dissipation efficiencyVSAvoidhot air current generation
Core Design Contradiction:
TemperatureVSObject-generated harmful factors

Solution Approach 1:

The invention extracts the harmful hot air current generation from the liquid cooling device by adding an air cooling device that actively draws in external air to replace the hot air exhausted by the liquid cooling device, thereby removing the harmful effect while preserving the heat dissipation benefit

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The invention introduces an intermediary air cooling device that acts as a mediator between the liquid cooling device and the environment, using external air as an intermediary substance to absorb and carry away the hot air current, thus preventing it from burdening the air conditioning system

Inventive Principle:
Principle #24Intermediary (Mediator)

2Temperature

If air cooling devices and liquid cooling devices operate concurrently, then heat dissipation capacity is improved, but power consumption of the air conditioning system increases

Engineering Contradiction:
Improveheat dissipation capacityVSAvoidair conditioning system power consumption
Core Design Contradiction:
TemperatureVSUse of energy by stationary object

Solution Approach 1:

The air cooling device operates autonomously using natural convection and the temperature difference between internal and external air, without requiring additional power input, thereby providing self-service cooling that reduces the burden on the air conditioning system

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The air cooling device operates periodically based on temperature thresholds detected by sensors, activating when the internal temperature exceeds external temperature and deactivating when it drops below, thereby providing periodic cooling action that reduces overall power consumption

Inventive Principle:
Principle #19Periodic action

3Temperature

If flow rate of cooling liquid is increased, then heat dissipation is improved, but energy consumption and system complexity increase

Engineering Contradiction:
Improveheat dissipation efficiencyVSAvoidcooling liquid pump energy consumption
Core Design Contradiction:
TemperatureVSUse of energy by moving object

Solution Approach 1:

The invention implements dynamic flow rate adjustment by using sensors to detect temperature and flow conditions, and a controller to dynamically adjust the pump operation accordingly, thereby optimizing heat dissipation efficiency while minimizing energy consumption under different operating conditions

Inventive Principle:
Principle #15Dynamics

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 reduces the temperature of the cabinet and machine room, lessens the workload of the air conditioning system, and promotes energy savings by efficiently managing the flow rate of the cooling liquid.

Implementation Method 1

a liquid cooling pipeline (3) comprising an admitting three-way valve (31), an admitting branch pipe (32), a discharging three-way valve (33) and a discharging branch pipe (34), the admitting three-way valve (31) receiving a liquid from an outside and delivering the liquid to the admitting branch pipe (32) and the rear door inlet (221)

Methodology Applied
Scientific EffectHeat conduction: Conduction (thermal)

Implementation Method 2

allows the liquids to be joined before being discharged to the outside

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 3

a temperature sensing device (4); and a flow rate control device (5) disposed at the liquid cooling pipeline (3), being in signal connection with the temperature sensing device (4)

Methodology Applied
Scientific EffectTemperature sensing: Thermocouple

Data Source

PatentUS12289870B2Smart flow rate control system for cooling server racks
Publication Date: 2025.04.29 META GREEN COOLING TECH CO LTD
  • US12289870B2 patent drawing
  • US12289870B2 patent drawing
  • US12289870B2 patent drawing

AI summary

A smart flow rate control system includes a cabinet, liquid cooling rear door, liquid cooling pipeline, temperature sensing device and flow rate control device. The liquid cooling rear door includes a door frame and a rear door cooling pipeline. The rear door cooling pipeline is mounted inside the door frame. The liquid cooling pipeline includes an admitting three-way valve, admitting branch pipe, discharging three-way valve and discharging branch pipe. The admitting three-way valve receives cooling liquid and delivers it to the admitting branch pipe and rear door inlet. The discharging three-way valve receives the cooling liquid from the rear door outlet and discharging branch pipe, respectively, and discharges it. The flow rate control device determines the flow ratio of the rear door cooling pipeline according to the temperature sensed. The smart flow rate control system overcomes drawbacks about removal of hot air current generated by servers.