Radial Fan Housing Integration to Reduce Component Complexity
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Solution Overview
Problem
Existing fan devices are complex and costly due to multiple components, limiting their manufacturability and efficiency, especially when trying to combine the advantages of free-running radial fans with classical housing fans.
Innovation Solution
A fan device design where the front cover plate simultaneously forms the front terminating wall of the outer housing, allowing for a simple and quick assembly by fastening to the frame-shaped peripheral wall, reducing the number of components and enabling inexpensive manufacturing, while maintaining the benefits of both free-running and classical housing fans.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate components are used for the fan housing and outer housing, then the structural integrity and functionality are improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The front cover plate of the fan housing is merged with the front terminating wall of the outer housing, creating a single integrated component that performs both functions. This reduces the total number of components while maintaining the structural integrity and functionality of both the fan housing and outer housing.
Solution Approach 2:
The front cover plate is designed to serve multiple functions: it acts as both the front cover of the fan housing and the front terminating wall of the outer housing. This multi-functionality reduces component count and simplifies the overall structure while maintaining reliability.
2Reliability
If multiple separate components are used for assembly, then the functionality and structural requirements are met, but the assembly time and manufacturing cost increase
Solution Approach 1:
By combining the front cover plate and front terminating wall into a single component, the assembly process is simplified. Fewer parts need to be handled, positioned, and fastened, directly reducing assembly time while maintaining all necessary functional requirements.
Solution Approach 2:
The multi-functional front cover plate reduces the number of assembly steps required. Instead of assembling separate components for the fan housing cover and outer housing wall, a single component is installed to fulfill both roles, significantly reducing assembly time.
3Power
If classical housing fan design with spiral housing is used, then the pressure energy conversion is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The spiral housing is segmented into modular components (guide wall with arcuate sections, front cover plate, rear cover plate) that can be manufactured separately and assembled. This segmentation allows for simpler, more cost-effective manufacturing of each component while maintaining the overall pressure energy conversion functionality.
Solution Approach 2:
The front cover plate serves dual purposes as both a structural cover and a pressure conversion surface, eliminating the need for separate components and reducing manufacturing complexity while maintaining the diffuser effect for pressure energy conversion.
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 enables a cost-effective, easily assembled fan device that can be used as a filter-fan-unit in clean rooms, offering improved efficiency and reduced component complexity, suitable for applications in air-conditioning and ventilation technology.
Implementation Method 1
an impeller (14) which is rotationally driven about a rotation axis (14a) and which has blade rows (16) directed counter to the running direction
Implementation Method 2
converts a part of the speed energy (dynamic pressure) into pressure energy (static pressure) by way of the continuous widening of the cross section in the flow direction (diffuser effect)
Data Source
AI summary
A fan device with at least one radial fan (12), with a fan housing (13) in which an impeller (14) which is rotationally driven about a rotation axis is arranged, wherein the fan housing has a guide wall (18) which extends in a circumferential direction (17) of the impeller (14) around this, is equipped with several arcuate wall sections and delimits air blow-out openings (19a-d), wherein an arcuate wall section of the guide wall (18) is assigned to each of the air blow-out openings (19a-d), wherein the fan housing (13) includes a front cover plate (20b) which is provided with an air suction opening (21), and a rear cover plate (20a) which with regard to the flow direction is arranged downstream of the front cover plate (20b), and wherein a frame-shaped peripheral wall (36) of an outer housing (35) is arranged around the guide wall (18) and at its rear side (37) includes a rear frame opening (38a).