Regenerative Blower Interrupter Noise Reduction
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Solution Overview
Problem
Conventional regenerative blowers are large, noisy, and unsuitable for use in respiratory devices due to their size and noise levels.
Innovation Solution
A regenerative blower design featuring a housing with a first and second port, an airflow channel connecting the ports, an impeller rotatable to promote airflow, a motor to drive the impeller, and an interrupter to limit airflow from the second port to the first port, with optional configurations including arcuate channels, curved interrupter faces, and recesses on the interrupter faces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional regenerative blower design is used, then effective airflow and pressure generation are achieved, but the device becomes large and noisy making it unsuitable for respiratory devices
Solution Approach 1:
The housing is divided into separate sections with distinct airflow channels for inlet and outlet streams. The inlet channel and outlet channel are spatially segmented and isolated from each other, allowing independent optimization of each flow path to reduce noise while maintaining effective airflow generation.
Solution Approach 2:
The interrupter structure incorporates curved leading and trailing faces specifically designed to interact with impeller blades at optimized angles. This local quality enhancement at critical interaction points reduces turbulence and noise while maintaining pressure generation efficiency.
2Volume of moving object
If conventional regenerative blower design is used, then effective airflow and pressure generation are achieved, but the device becomes large making it unsuitable for respiratory devices
Solution Approach 1:
The airflow channels are configured in a three-dimensional arrangement where the inlet channel and outlet channel occupy different spatial dimensions and planes. This dimensional separation allows compact packaging of the device while maintaining effective airflow paths and pressure generation capability.
Solution Approach 2:
The impeller is positioned within the housing such that the airflow channels are nested around the impeller rotation path. The inlet channel and outlet channel are arranged concentrically and radially to maximize space utilization, creating a compact design that maintains effective airflow generation.
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 design results in a regenerative blower that is quieter and more compact, suitable for use in respiratory devices, while maintaining effective airflow and pressure generation.
Implementation Method 1
An impeller driven by a motor rotate is in a channel that is pneumatically connected to the airflow channel. The impeller rotates to provide a flow of air within the airflow channel from the inlet to the outlet.
Implementation Method 2
The airflow channel has an interrupter positioned between the inlet and outlet to prevent airflow going directly from the outlet to the inlet.
Data Source
AI summary
In accordance with one aspect the present invention may comprise a regenerative blower comprising: a housing, a first port and second port in the housing, an airflow channel extending between the first and second ports for airflow between the ports, an impeller rotatable in an impeller channel to promote airflow in the airflow channel from the first port to the second port, a motor to drive the impeller, and an interrupter between the first and second ports to limit airflow from the second port to the first port.