Shell plate sound isolating structure
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Solution Overview
Problem
The existing design of computer mainframes with ventilation holes and fans nearby results in unstable airflow, leading to increased noise due to direct airflow through these openings.
Innovation Solution
A shell plate sound isolating structure is designed with a first wind port and a second wind port connected via an elongated flow channel, using partition plates to block direct communication and create a stable airflow path, while sound isolation materials are used to further reduce noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the ventilation hole and fan are disposed close to each other for compact design, then the device complexity is reduced, but the noise generated by unstable airflow increases
Solution Approach 1:
The internal space of the shell plate is divided into multiple regions by partition plates, creating separate flow channels for different airflows. This segmentation prevents direct mixing of unstable airflows from the fan and ventilation hole, reducing noise while maintaining compact structure.
Solution Approach 2:
Partition plates are introduced as intermediary structures between the fan and ventilation hole. These plates create elongated flow channels that buffer and stabilize the airflow, acting as a mediator that reduces the direct interaction between unstable airflows and thereby decreases noise generation.
2Object-generated harmful factors
If an elongated flow channel is created using partition plates to stabilize airflow, then the noise is reduced, but the device complexity increases
Solution Approach 1:
The shell plate structure is segmented into multiple compartments using partition plates, creating elongated flow channels. This segmentation approach achieves noise reduction through airflow stabilization while maintaining a modular design that does not significantly increase overall structural complexity.
Solution Approach 2:
Partition plates are nested within the shell plate structure, with each partition creating a flow channel that is contained within the overall housing. This nesting approach allows the creation of complex flow paths without proportionally increasing the external dimensions or overall structural complexity.
3Stability of the object's composition
If partition plates are used to block direct communication between wind ports, then airflow stability is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The use of partition plates to segment the internal space provides clear, discrete components that can be manufactured and assembled with standard tolerances. Each partition plate creates a defined flow channel, making the assembly process more straightforward compared to creating complex integrated flow paths.
Solution Approach 2:
The partition plates are pre-formed as separate components with predetermined shapes and positions, allowing for preliminary manufacturing and quality control before final assembly. This preliminary action approach reduces the precision requirements during final assembly compared to creating monolithic flow channels.
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 design stabilizes airflow and significantly reduces noise generated by the fan by buffering airflow through the elongated flow channel and intercepting sound transmissions, enhancing noise reduction efficiency.
Implementation Method 1
a surface of the partition plate and the front plate, and the rear plate and an inner wall surface of the annular peripheral plate are adhered with sound isolation materials, when the airflow flows through the partition plate or the hollow plate body, the sound isolating material is able to intercept sound transmissions
Data Source
AI summary
A shell plate sound isolating structure is applied in a fan (100), and includes a hollow plate body (1) having a front plate (11), a rear plate (12) and an annular peripheral plate (13), wherein the rear plate (12) has a first wind port (14) where the fan (100) is disposed, the front plate (11) or the annular peripheral plate (13) has at least one second wind port (15); and at least one partition plate (2), disposed inside the hollow plate body (1) and capable of fully blocking between the first wind port (14) and the at least one second wind port (15), wherein a partition space (s) is formed between the at least one partition plate (2) and the hollow plate body (1) for forming an elongated flow channel (f) allowing the first wind port (14) and the second wind port (15) to be in communication.