Two-Stage Ventilator Blower Housing With Lower Flow Resistance
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Solution Overview
Problem
Existing blower apparatuses for ventilators have numerous housing components that create barriers and flow resistance, reducing respiratory gas throughput and requiring higher motor power, leading to increased noise.
Innovation Solution
A two-stage blower apparatus with a two-part blower housing and integrated blower wheels that minimize interfaces and flow resistance by eliminating spacer sleeves, using one-piece blower wheels and additive manufacturing to reduce physical barriers, and synchronizing both wheels on a shared drive shaft for efficient compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple housing components and spacer sleeves are used to form the gas channel, then the structural integrity and assembly are improved, but the respiratory gas throughput is reduced due to increased flow resistance and turbulence at interfaces
Solution Approach 1:
The patent merges multiple housing components and spacer sleeves into a single integrated housing structure with integrated blower wheels, eliminating the interfaces between separate components. This consolidation removes flow resistance barriers while maintaining structural integrity through the unified design, directly resolving the contradiction between structural reliability and gas throughput.
Solution Approach 2:
The invention extracts and eliminates the spacer sleeves and intermediate housing components from the system. By removing these unnecessary intermediate elements that create flow resistance, the gas channel becomes more direct and efficient, improving respiratory gas throughput without compromising the overall structural integrity of the blower apparatus.
2Ease of manufacture
If multiple housing components and interfaces are used in the gas channel, then the assembly and manufacturing are improved, but the motor power requirements increase due to higher flow resistance
Solution Approach 1:
The patent combines multiple separately manufactured components into an integrated housing structure with built-in blower wheels. While this may increase initial manufacturing complexity, it eliminates the need for multiple assembly steps involving spacer sleeves and intermediate housings, while simultaneously reducing motor power requirements by minimizing flow resistance in the gas channel.
3Strength
If multiple housing components and interfaces are present in the gas channel, then the structural support is improved, but the noise production increases due to turbulence at interfaces
Solution Approach 1:
The invention integrates the housing structure and blower wheels into a unified component, eliminating the interfaces where turbulence and noise generation occur. The integrated design maintains necessary structural support while removing the sources of noise associated with gas flow disruption at component interfaces.
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
Enhances respiratory gas throughput, reduces motor power requirements, and decreases noise production while being more cost-effective by minimizing flow resistance and housing parts.
Implementation Method 1
the blower wheel sucks in air or a gas mixture from the surroundings and compresses it in a gas channel
Implementation Method 2
having a drive motor and having a multistage radial blower driven by the drive motor
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
The invention relates to a two-stage blower apparatus 120 for a ventilator for providing a respiratory gas for a patient having a multipart blower housing 121 comprising at least one first housing part 122 and a second housing part 132. A gas inlet 123 for the respiratory gas is provided on the first housing part 122 and a gas outlet 133 for the respiratory gas is provided on the second housing part 132, wherein the blower apparatus 120 comprises a first blower wheel 140 and a second blower wheel 150. The first blower wheel 140 or the second blower wheel 150 are arranged in sections in the first housing part 122 and are arranged in sections in the second housing part 132.