Anesthesia Fan Assembly Housing for Motor Heat Dissipation

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Solution Overview

Problem

Existing anesthesia machines utilize complex and costly heat dissipation structures, such as heat sinks or heat pipes, to dissipate heat generated by motors in fan assemblies.

Innovation Solution

A simplified heat dissipation structure is implemented using a fan assembly with a heat-dissipating member mounted on the motor to conduct heat to the housing, which is then dissipated, utilizing airflow to cool the motor effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If heat sinks or heat pipes are used to dissipate heat from the motor, then heat dissipation effectiveness is improved, but device complexity and cost increase

Engineering Contradiction:

Improvemotor heat dissipationVSAvoidheat dissipation structure

Core Design Contradiction:

TemperatureVSDevice complexity

Solution Approach 1:

The housing serves dual functions: as the structural enclosure for the fan assembly and as the heat dissipation component. The housing is designed with heat dissipation structures (such as fins or ventilation channels) that directly conduct and dissipate heat from the motor, eliminating the need for separate heat sinks or heat pipes.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The housing is transformed from a single-function structural component into a multi-functional element that simultaneously provides mechanical protection, structural support, and active heat dissipation. This multi-functionality reduces the total number of components and simplifies the overall device structure.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Temperature

If heat sinks or heat pipes are used to dissipate heat from the motor, then heat dissipation effectiveness is improved, but manufacturing cost increases

Engineering Contradiction:

Improvemotor heat dissipationVSAvoidmanufacturing cost

Core Design Contradiction:

TemperatureVSEase of manufacture

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention replaces expensive thermal management components (heat sinks, heat pipes) with a cost-effective housing structure that performs the same function. The housing, already required for structural purposes, is modified to include heat dissipation features, significantly reducing material and manufacturing costs.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

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

This approach provides a cost-effective and efficient heat dissipation mechanism for anesthesia machines, reducing complexity and operational costs while maintaining effective cooling.

Implementation Method 1

the first heat-dissipating member is mounted on the motor and connected to the housing, and the first heat-dissipating member is configured to conduct heat generated by the motor to the housing

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 2

the fan is configured to drive air from the first air inlet into the first inner cavity and blow the air out from the first air outlet

Methodology Applied

Scientific EffectForced convection: Forced Convection

Data Source

PatentEP4272789B1Anesthesia machine with a driving gas circuit comprising a fan assembly

Publication Date: 2026.01.28 SHENZHEN MINDRAY BIO MEDICAL ELECTRONICS CO LTD

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AI summary

Disclosed by the present application are an anesthesia machine, a veterinary anesthesia machine, and a fan assembly; the anesthesia machine comprises a driving gas branched path, a fresh gas branched path, and a breathing circuit; the fresh gas branched path is used for delivering fresh gas having anesthetic gas into the breathing circuit; the driving gas branched path is used for pushing fresh gas from the breathing circuit to a patient; the driving gas branched path comprises a fan assembly; the fan assembly comprises a housing, a fan, and a first heat-dissipating member; the housing comprises a first inner cavity, a first air inlet connected to the first inner cavity, and a first air outlet in communication with the first inner cavity; the fan is disposed in the first inner chamber, and the fan is used for driving air from the first air inlet into the first inner chamber and blowing it out from the first air outlet; the fan comprises a volute, an impeller, and a motor; the impeller is rotatably mounted in the volute, and the motor is mounted in the volute and connected to the impeller; the first heat-dissipating member is mounted on the motor and connected to the housing, and the first heat-dissipating member is used for conducting to the housing the heat generated by the motor.