Container Treatment Airflow Partitioning for Sterile Handling

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Solution Overview

Problem

Existing methods for sterilizing and treating containers in blow molding machines are complex and costly, and the machine housing is not designed as a complete cleanroom enclosure, allowing potential contamination from the factory floor.

Innovation Solution

A method and device that utilize partitions within the machine housing to create vertical airflow and suction channels, ensuring sterile air flows from top to bottom and outward, maintaining a contamination-free environment by using HEPA filters and strategically positioned air supply and extraction units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If the machine housing is not designed as a complete cleanroom enclosure, then the device complexity is reduced and ease of manufacture is improved, but contamination risk increases and sterility reliability deteriorates

Engineering Contradiction:
Improvemachine housing structureVSAvoidsterility maintenance
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The machine housing is segmented into multiple sections (first section with treatment device, second section with transfer device, third section with discharge device) separated by partition walls. Each section can be independently controlled for air flow and pressure, allowing sterility maintenance without requiring a complete cleanroom enclosure. This segmentation reduces overall system complexity while maintaining reliability in critical areas.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Different sections of the machine housing have different air flow and pressure characteristics. The first section (treatment area) maintains positive pressure with downward air flow for maximum sterility, while other sections have different configurations. This local differentiation allows each area to have the exact quality needed for its function without over-engineering the entire housing.

Inventive Principle:
Principle #3Local quality

2Object-affected harmful factors

If partitions are arranged around the treatment device to form an inner section, then contamination protection is improved, but device complexity increases due to additional structural elements

Engineering Contradiction:
Improvecontamination protectionVSAvoidpartition structure
Core Design Contradiction:
Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

Partition walls divide the machine housing into distinct sections, creating an inner section around the treatment device. This segmentation provides contamination protection by isolating the sterile treatment area from non-sterile areas, while the modular partition design keeps the added complexity manageable and structured.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The partition walls act as intermediaries between sterile and non-sterile areas. They are equipped with openings that allow container transport while maintaining pressure differentials and air flow separation. This intermediary structure provides effective contamination protection without requiring complete sealing, balancing protection needs with operational requirements.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Reliability

If air supply and extraction devices are positioned to create vertical airflow, then sterility maintenance is improved, but device complexity increases due to additional air handling components

Engineering Contradiction:
Improvesterility maintenanceVSAvoidair handling system
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

Air is supplied in advance to the first section before containers enter the treatment device, establishing a positive pressure environment and downward air flow pattern. This preliminary action ensures that sterile air is already in place and moving in the correct direction before contamination risk arises, maintaining sterility reliability without requiring complex real-time control systems.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The air handling system uses pneumatic principles to create vertical air flow through the treatment section. Air supply devices introduce sterile air that flows downward due to pressure differentials created by extraction devices. This pneumatic approach maintains sterility through physical air movement rather than complex mechanical barriers, simplifying the overall system while maintaining high reliability.

Inventive Principle:
Principle #29Pneumatics and hydraulics

4Ease of operation

If the treatment process is conducted in a non-cleanroom environment, then ease of operation is improved and accessibility is enhanced, but contamination risk increases

Engineering Contradiction:
Improveoperator accessibilityVSAvoidcontamination risk
Core Design Contradiction:
Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The machine housing is segmented into sterile and non-sterile zones with partition walls. The first section containing the treatment device forms an inner section that can be accessed through controlled openings. This segmentation allows operators to work in the easier-to-access non-sterile areas while the sterile inner section maintains contamination protection, combining ease of operation with contamination prevention.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

Partition walls with controlled openings act as intermediaries between operator access areas and the sterile treatment area. These openings allow necessary operations while maintaining pressure differentials and air flow patterns that prevent contamination. This intermediary structure enables ease of operation in accessible areas while protecting the sterile treatment zone from contamination risks.

Inventive Principle:
Principle #24Intermediary (Mediator)

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 configuration ensures a highly contamination-free treatment process by preventing contact with non-sterile air, reducing the risk of recontamination and simplifying the treatment process while maintaining high sterility standards.

Implementation Method 1

A method and device for the contamination-free treatment of containers in a treatment machine... partitions that are arranged at least section by section around the treatment device in order to form an inner section... An air supply device for sterile air is connected laterally and/or from above to the inner section... By means of the air supply device, sterile air is supplied within the inner section... a first inner air displacement section is formed, surrounding the treatment device

Methodology Applied
Scientific EffectVertical displacement flow: Convection

Implementation Method 2

An air extraction device is connected laterally and/or from above to outer extraction channels... through which air can be extracted from these outer extraction channels, so that a suction flow is formed... air flows from the first inner air displacement section to the outer extraction channels under the partition walls

Methodology Applied
Scientific EffectSuction flow: Suction

Implementation Method 3

utilize partitions within the machine housing to create vertical airflow and suction channels, ensuring sterile air flows from top to bottom and outward, maintaining a contamination-free environment by using HEPA filters

Methodology Applied
Scientific EffectFiltration: Filter (physical)

Data Source

PatentEP4650144A1Method and device for the contamination-free treatment of containers in a treatment machine
Publication Date: 2025.11.19 KHS GMBH
  • EP4650144A1 patent drawingFigure 1
  • EP4650144A1 patent drawingFigure 2
  • EP4650144A1 patent drawingFigure 3

AI summary

The present invention relates to a device and a method for the contamination-free treatment of containers in a treatment machine (1) surrounded by a machine housing (11) standing above a base (13), wherein the treatment machine (1) comprises at least a first section (S1) in which a treatment device (4) for the containers, in particular a treatment wheel, is arranged, wherein the method comprises: arranging partitions (9) in the first section (S1) and arranging the partitions at least section by section around the treatment device (4) to form an inner section at least partially surrounded by the partitions (9), connecting an air supply device (7) for sterile air to the inner section and supplying sterile air within the inner section enclosed by the partitions (9),such that at least in the area of ​​the containers (B) a first inner air displacement section (14) is formed, wherein the partitions (9) are arranged at least sectionally spaced from the machine housing (11), preferably inwards, so that external extraction channels (12) are formed between the machine housing (11) and the partitions (9), which surround the treatment device (4) to a predominant extent, wherein the partitions (9) extend at least sectionally along a transport path of the containers (B) around the treatment device (4) and project vertically above and below the containers (B) without being closed off with the base (13), in particular the installation base, wherein the extraction channels (12) are closed laterally and upwards, and a vertical displacement flow (5) is formed at least in the area of ​​the containers (B) by the supply of sterile air in the first inner air displacement section (14).Connecting the outer extraction ducts (12) to an air discharge device (8), extracting the air from the outer extraction ducts (12) by means of the air discharge device (8), so that a suction flow is formed in the extraction ducts (12) and air flows from the first inner air displacement section (14) in a radial direction to the outer extraction ducts (12) under the partition walls (9).