Pulp-Fiber Refrigerant Pipe Wrapping With Air-Gap Sound Absorption
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Solution Overview
Problem
Existing sound absorption structures for refrigerant pipes rely on the thickness of inorganic fibrous woven cloths and heat insulation mats for sound absorption performance, limiting their ability to effectively attenuate sound energy.
Innovation Solution
A refrigerant pipe with a sound absorber made of pulp-based fiber material that surrounds the pipe without an intervening material, utilizing space between the pipe and absorber to convert sound energy into heat energy, enhancing sound absorption performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If inorganic fibrous woven cloth and heat insulation mat are layered in close contact on the pipe, then the structure is compact and easy to manufacture, but the sound absorption performance is limited
Solution Approach 1:
The patent introduces an intermediary air layer between the pipe surface and the sound absorber, and between layers of sound absorbing materials. This air layer acts as a mediator that enhances sound absorption by allowing sound waves to penetrate and be converted to heat energy through the porous structure, resolving the contradiction between compact manufacturing and effective sound absorption.
Solution Approach 2:
The patent employs porous sound absorbing materials with specific pore structures that allow sound wave penetration. The porous nature enables sound energy to be converted into heat energy through friction and viscosity effects within the pores, significantly improving sound absorption performance while maintaining a relatively compact structure.
2Object-affected harmful factors
If the thickness of sound absorber is increased to improve sound absorption performance, then sound absorption performance increases, but manufacturing cost and device complexity increase
Solution Approach 1:
The air layer serves as an intermediary that enhances the sound absorption efficiency of the existing material thickness. By introducing this air medium, the system achieves superior sound absorption performance without increasing the physical thickness of the solid sound absorbing materials, thereby reducing complexity and cost.
Solution Approach 2:
The patent changes the physical parameters of the sound absorption system by introducing air gaps with specific dimensions. This parameter change (from solid continuous structure to segmented structure with air layers) dramatically improves sound absorption performance without proportionally increasing material thickness or complexity.
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 solution effectively increases sound absorption performance by converting sound energy into heat energy through both the air chamber in the absorber and the space between the pipe and absorber, while maintaining a high-frequency sound attenuation effect without increasing the absorber's thickness, thus reducing manufacturing costs.
Implementation Method 1
In the sound absorber 20, sound energy is converted into heat energy
Implementation Method 2
sound energy is converted into heat energy not only by using the sound absorber 20 but also by using the space 24 between the refrigerant pipe 10 and the sound absorber 20
Implementation Method 3
sound energy is converted into heat energy not only by using the sound absorber 20 but also by using the space 24 between the refrigerant pipe 10 and the sound absorber 20
Data Source
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AI summary
A pipe with a sound absorber has a fluid pipe in which fluid passes and a sound absorber of a pulp-based fiber material. The sound absorber surrounds an outer circumference of the fluid pipe. The sound absorber is provided to secure space between an outer surface of the fluid pipe and an inner surface of the sound absorber.