Unpowered Door Closer for Hot-Cold Aisle Containment

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Solution Overview

Problem

In data center rooms, the management of thermal energy generated by densely packed electronic equipment is challenging, leading to overheating issues, and existing door assemblies often fail to provide controlled access to hot and cold aisles without increasing power requirements.

Innovation Solution

A door closer mechanism with a belt/pulley assembly and return spring system is integrated into the door assembly, allowing for controlled access to hot and cold aisles by automatically closing doors without the need for power, minimizing air intermixing and addressing accidental door openings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a door assembly is used to provide access to hot and cold aisles, then controlled access is enabled, but the door may accidentally open and fail to maintain air containment

Engineering Contradiction:

Improvedoor containment reliabilityVSAvoiddoor operation control

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The door assembly incorporates a door closer mechanism that automatically closes the door without requiring external power or manual operation. The mechanism uses a spring-loaded system with a damper pulley that self-regulates the closing speed and provides reliable air containment, eliminating the need for powered actuators or complex control systems.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The door closer mechanism includes a damper pulley that provides controlled resistance during door closing, preventing sudden slamming and accidental openings. The damper element cushions the door's movement, ensuring smooth operation and maintaining air containment reliability while ease of operation is preserved.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Reliability

If a powered door closer mechanism is used to ensure automatic door closing, then air containment is improved, but power requirements increase

Engineering Contradiction:

Improveautomatic door closing reliabilityVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The door closer mechanism is entirely mechanical and self-powered, using a spring-loaded system that automatically closes the door without requiring external electrical power. The spring provides the closing force, and the damper pulley provides controlled resistance, eliminating all power requirements while maintaining reliable automatic door closing.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces any potential powered actuator system with a purely mechanical spring-loaded door closer mechanism. This substitution eliminates electrical power requirements while maintaining the reliability of automatic door closing through mechanical principles alone.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of operation

If doors are kept open for easy access, then ease of operation is improved, but thermal energy management deteriorates due to air intermixing

Engineering Contradiction:

Improveaccess easeVSAvoidthermal energy containment

Core Design Contradiction:

Ease of operationVSTemperature

Solution Approach 1:

The door assembly automatically closes itself after being opened, using the spring-loaded mechanism to return the door to its closed position. This self-closing behavior maintains thermal containment by preventing prolonged door openings, while users still experience easy access during the opening phase.

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The damper pulley provides controlled resistance during door closing, preventing sudden movements that could cause air leakage. This cushioning effect ensures smooth, controlled door closure that maintains thermal containment while preserving user convenience during normal operation.

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

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 effectively manages thermal energy by ensuring doors are closed automatically, reducing overheating risks and maintaining efficient air separation within the data center, while avoiding additional power requirements.

Implementation Method 1

Methodology Applied

Scientific EffectSpring: Spring

Implementation Method 2

A door closer mechanism with a belt/pulley assembly and return spring system is integrated into the door assembly

Methodology Applied

Scientific EffectBelt/pulley mechanism: Pulley

Data Source

PatentUS11246231B2Door closer mechanism for hot/cold aisle air containment room

Publication Date: 2022.02.08 CHATSWORTH PRODUCTS INC

AI summary

A hot/cold aisle air containment room includes a plurality of electronic equipment enclosures at least partially defining an interior aisle, a frame structure supporting one or more ceiling panels above the interior aisle, and a door assembly. The door assembly includes a sliding door and an unpowered door closer mechanism adapted to move the sliding door from an open state to a closed state, thereby providing controlled access to the interior aisle and minimizing intermixing of hot air and cold air between an environment external to the hot/cold aisle air containment room and an environment internal to the hot/cold aisle air containment room.