Noise Reduction Device for Container Blow-Off Systems
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Solution Overview
Problem
Existing noise reduction methods for container treatment devices, such as blow-off devices, are inadequate in humid environments due to the inability to use sound-absorbing materials like PUR foam mats, which can lead to mold growth and hygiene issues, and water-repellent fleece solutions that are not fully effective.
Innovation Solution
A noise reduction device comprising a sound insulation wall with a foam noise protection element and a noise protection body with micro-slotted openings, where the noise protection body acts as a splash protector and can be easily cleaned, and the entire system is designed to absorb and attenuate sound while preventing moisture ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If sound-absorbing materials like PUR foam mats are used in the blow-off zone, then noise reduction is significantly improved, but moisture from wet containers will be distributed throughout the housing and tunnel leading to mold growth on the non-washable mats
Solution Approach 1:
The noise reduction system is divided into two separate components: a foam element for sound absorption and a noise protection body with micro-slotted openings that acts as a protective barrier. This segmentation allows the foam to be shielded from moisture while maintaining its sound-absorbing function.
Solution Approach 2:
The noise protection body with micro-slotted openings serves as an intermediary barrier between the wet containers and the foam element. It allows sound waves to pass through to the foam for absorption while preventing moisture and residues from reaching the foam, thus protecting it from mold growth.
2Object-generated harmful factors
If porous surfaces like foam panels are used for noise reduction, then noise reduction effectiveness is significantly improved, but the surfaces cannot be cleaned for hygienic reasons
Solution Approach 1:
The system separates the sound-absorbing foam element from the container-exposed noise protection body. The noise protection body with its micro-slotted surface can be cleaned and removed for hygiene maintenance, while the foam element remains protected and maintains its porous sound-absorbing structure.
Solution Approach 2:
The noise protection body acts as an intermediary that exposes a cleanable surface to containers while shielding the foam element. The micro-slotted openings allow acoustic transmission but prevent direct contact between contaminants and the foam, enabling hygiene maintenance of the exposed surfaces.
3Object-generated harmful factors
If PUR foam boards with water-repellent fleece are used, then some noise reduction and moisture protection is achieved, but surfaces that cannot be cleaned may still occur
Solution Approach 1:
Rather than relying on water-repellent coatings on foam, the invention segments the system into a removable noise protection body with cleanable micro-slotted surfaces and a protected foam element. This allows complete cleaning of the exposed surfaces without relying on water-repellent properties.
Solution Approach 2:
The noise protection body with micro-slotted openings serves as an intermediary barrier that provides both noise reduction and complete protect ion of the foam element. Unlike water-repellent fleece that may still allow moisture penetration, the micro-slotted structure completely prevents moisture contact while allowing sound transmission.
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 reduces noise emissions by 3 dB(A) at 200 Hz frequency, maintains hygiene by preventing moisture and residue contact with the sound insulation mat, and allows for easy cleaning and maintenance of the noise protection body.
Implementation Method 1
a first planar noise protection element (62) comprising a foam, and a noise protection body (64) arranged adjacent to this first noise protection element (62), wherein a surface of this noise protection body (64) faces the containers
Implementation Method 2
a noise protection body (64) arranged adjacent to this first noise protection element (62), wherein a surface of this noise protection body (64) faces the containers
Data Source
Figure 1~3
Figure 4~5
Figure 6~7
AI summary
Device (1) for treating and in particular drying containers with a transport device (2) which transports the containers through a blow-off area (4), wherein at least one blow-off device (42) is arranged in this blow-off area (4) which applies a gaseous medium to the containers, wherein the blow-off area is arranged within a housing (8) which at least partially surrounds this blow-off area, with a feed opening through which the containers are fed to the blow-off area and a discharge opening through which the containers are discharged from the blow-off area and with a sound reduction device (6) which reduces sound generated inside the blow-off area, characterized in that the sound reduction device has at least one sound insulation wall (60) formed within the housing,wherein this sound insulation wall comprises a first planar noise protection element (62) containing a foam, and a noise protection body (64) arranged adjacent to this first noise protection element (62), wherein a surface of this noise protection body (64) faces the containers.