Airless Dispensing System Pressure Compensation
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Solution Overview
Problem
Existing airless dispensing systems face challenges in maintaining products under positive pressure conditions without undesired distension of elastic means during dispensing, which can lead to contamination and loss of product stability.
Innovation Solution
The method involves temporarily establishing pressure conditions lower than atmospheric pressure in a pressure chamber linked to the elastic means, preventing distension or compression of the elastic means, thus maintaining product under positive pressure without expanding the pressure chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic means are loaded to compress the storage enclosure and maintain positive pressure, then product stability and controlled dispensing are improved, but the elastic means distend as product is discharged causing loss of positive pressure and potential contamination
Solution Approach 1:
The system divides the pressure maintenance function into two independent components: elastic means for compression and a volume compensation device for maintaining pressure. This segmentation allows each component to perform its specific function without interfering with the other, solving the contradiction between elastic means distension and pressure maintenance.
Solution Approach 2:
The volume compensation device acts as an intermediary between the elastic means and the storage enclosure. It compensates for the volume changes caused by elastic means distension, thereby maintaining the positive pressure conditions in the storage enclosure without requiring the elastic means to remain constantly compressed.
2Ease of operation
If elastic means are used to maintain positive pressure, then controlled dispensing is improved, but system complexity increases due to need for additional actuators and operations
Solution Approach 1:
The volume compensation device is designed to automatically respond to volume changes in the storage enclosure. It self-regulates the pressure conditions without requiring external actuators or complex control systems, thereby maintaining ease of operation while preventing harmful effects.
3Productivity
If the storage enclosure volume varies during dispensing, then product discharge is enabled, but the elastic means distend reducing their ability to maintain positive pressure
Solution Approach 1:
The volume compensation device is pre-configured to compensate for volume changes before they affect the pressure conditions. By anticipating the volume reduction during dispensing, the device maintains positive pressure conditions throughout the dispensing process rather than allowing pressure loss to occur.
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 approach ensures reliable and controlled dispensing of products, preventing contamination and maintaining product stability by compensating for the elastic means' load during dispensing, allowing for efficient and consistent delivery of doses without complex operations or additional actuators.
Implementation Method 1
elastic means which, when elastically loaded, tend to compress the storage enclosure (30)
Implementation Method 2
temporary establishment of pressure conditions Pv lower than atmospheric pressure in a pressure chamber (40)
Data Source
Figure 1
Figure 2a~3b
Figure 4a~6a
AI summary
The present invention relates to a method for dispensing a dose (3b) of a liquid or pasty product (3) which occupies a storage enclosure (30) of variable volume in a container (2) and is subjected to a pressure greater than atmospheric pressure as a result of elastic means (20) which, when elastically loaded, tend to compress the mentioned storage enclosure (30), the method comprising the step of restoring the load of the elastic means (20), compensating for or preventing a distension thereof caused by the dispensing of a dose (3a) of the product (3) extracted from the storage enclosure (30), by means of the temporary establishment of pressure conditions Pv lower than atmospheric pressure in a pressure chamber (40) which is a chamber of variable volume linked to, or under the influence of, the elastic means (20).