Blower Mounting Assembly Vibration Damping

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Solution Overview

Problem

Conventional methods for minimizing operating noise in gas delivery systems, such as those used in ventilators and pressure support devices, have proven ineffective, inefficient, and expensive due to vibrations caused by the flow generator and air intake.

Innovation Solution

A mounting assembly comprising a vibration damper body made of compliant materials, shaped to engage the flow generator housing, which creates air gaps to absorb vibrations and reduce noise transmission, is integrated within the external housing of the gas delivery system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Stability of the object's composition

If conventional mounting methods are used to secure the flow generator, then structural stability is improved, but operating noise increases due to vibration transmission

Engineering Contradiction:

Improvestructural stabilityVSAvoidoperating noise

Core Design Contradiction:

Stability of the object's compositionVSObject-generated harmful factors

Solution Approach 1:

The patent introduces a vibration damper body as an intermediary element between the flow generator and the external housing. This mediator absorbs and dissipates vibrations generated by the flow generator, preventing their transmission to the housing and reduction of operating noise, while still maintaining structural stability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the physical parameters of the mounting system by using a compliant material for the vibration damper body. This material has viscoelastic properties that allow it to deform and absorb vibration energy, transforming the rigid mounting approach into a compliant one that reduces noise transmission while preserving structural integrity.

Inventive Principle:

Principle #35Parameter changes

2Ease of manufacture

If rigid mounting structures are used, then manufacturing simplicity is improved, but vibration damping capability deteriorates

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidvibration transmission

Core Design Contradiction:

Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The vibration damper body is formed from a compliant material that combines damping and structural functions. This composite approach integrates vibration absorption capabilities into the mounting structure itself, achieving effective vibration damping without requiring separate complex damping mechanisms.

Inventive Principle:

Principle #40Composite materials

3Object-generated harmful factors

If expensive conventional noise reduction methods are used, then operating noise is reduced, but device cost increases

Engineering Contradiction:

Improveoperating noiseVSAvoiddevice cost

Core Design Contradiction:

Object-generated harmful factorsVSEase of manufacture

Solution Approach 1:

The patent employs a cost-effective vibration damper body made from compliant material that can be easily manufactured and integrated into the device. This affordable damping solution provides effective noise reduction without the high costs associated with conventional noise reduction methods, making it economically viable for mass production.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The vibration damper body may utilize porous or cellular structures that provide effective vibration damping at low cost. These porous compliant materials offer high damping performance per unit cost, enabling effective noise reduction without significantly increasing device manufacturing costs.

Inventive Principle:

Principle #31Porous materials

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 dampens vibrations and noise by creating air gaps between the vibration damper body and the external housing, significantly reducing operating noise associated with the flow generator.

Implementation Method 1

The vibration damper body is disposed within the external housing and is formed of one or more compliant materials that are shaped to be complementary to the peripheral surface of the flow generator housing so as to engage the peripheral surface of the flow generator housing

Methodology Applied

Scientific EffectVibration damping: Damping

Implementation Method 2

formed of one or more compliant materials that are shaped to be complementary to the peripheral surface of the flow generator housing

Methodology Applied

Scientific EffectCompliant material deformation: Elasticity

Data Source

PatentUS7617823B2Blower mounting assembly

Publication Date: 2009.11.17 PHILIPS RS NORTH AMERICA LLC

AI summary

A gas delivery system comprising an external housing, a flow generator, and a vibration damper body. The flow generator is disposed in the external housing, and has a flow generator housing with a peripheral surface and a lower surface. The vibration damper body is disposed within the external housing and is formed of one or more compliant materials that are shaped to be complementary to the peripheral surface of the flow generator housing so as to engage the peripheral surface of the flow generator housing. The vibration damper body has a lower surface attached to a bottom surface of the external housing, and also has a peripheral surface formed such that at least one air gap is created between at least a portion of the vibration damper body and the external housing.