Formic Acid Vapour Dispenser With Membrane-Controlled Evaporation
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Solution Overview
Problem
Existing formic acid vapour dispensers for bee hives are heavily dependent on external climate conditions, leading to inconsistent evaporation rates and potential health risks due to handling of open acid or moistened surfaces, and fail to maintain effective mite control under varying weather conditions.
Innovation Solution
A dispenser with a gas-permeable liquid barrier separates the evaporation and storage compartments, allowing the evaporation surface to be positioned adjacent to the brood nest, independent of external climate, using a hydrophobic membrane to prevent liquid leakage and ensure consistent vapour release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the evaporation surface is exposed to the external air space in known dispensers, then the vapour release can occur, but the evaporation rate becomes highly dependent on external climate conditions
Solution Approach 1:
The dispenser is divided into two separate compartments: a first compartment for storing liquid formic acid and a second compartment for evaporation. This segmentation allows the storage compartment to be isolated from external climate conditions while the evaporation compartment can be positioned in a thermally stable location adjacent to the brood nest, thereby maintaining consistent evaporation rates regardless of external weather variations.
Solution Approach 2:
A gas-permeable liquid barrier membrane is introduced as an intermediary between the liquid formic acid and the evaporation space. This membrane allows formic acid vapour to pass through while preventing liquid leakage and blocking external moisture from reaching the acid, thus decoupling the evaporation process from external humidity conditions and ensuring reliable vapour release.
2Device complexity
If the evaporation surface is positioned away from the brood nest in known dispensers, then the structure is simpler, but the treatment effectiveness decreases
Solution Approach 1:
By separating storage and evaporation functions into different compartments, the invention enables the evaporation compartment to be positioned optimally adjacent to the brood nest for effective treatment, while the storage compartment can be located elsewhere in the hive. This spatial segmentation allows both structural simplicity and treatment effectiveness to be achieved simultaneously.
Solution Approach 2:
The use of a gas-permeable liquid barrier membrane allows the creation of a compact evaporation compartment that can be positioned close to the brood nest without requiring complex structural modifications to the hive. The thin film barrier enables effective vapour delivery while maintaining a simple overall dispenser structure.
3Ease of operation
If liquid formic acid is handled openly in known dispensers, then the application is simpler, but health risks increase
Solution Approach 1:
A gas-tight cover sealed with a gas-permeable liquid barrier membrane encloses the liquid formic acid, creating a protective barrier that prevents direct contact and inhalation risks while allowing controlled vapour release. This encapsulation maintains ease of operation by simplifying the filling process while dramatically reducing health risks through the protective membrane barrier.
Solution Approach 2:
The gas-permeable liquid barrier membrane serves as an intermediary that allows the dispenser to be filled and handled more safely by preventing direct exposure to liquid formic acid, while still enabling the necessary vapour release for effective mite control.
4Productivity
If the hive volume is expanded to accommodate treatment space in known dispensers, then the vapour distribution improves, but the hive structure becomes more complex
Solution Approach 1:
The invention creates a dedicated evaporation compartment that efficiently distributes vapour to a limited space adjacent to the brood nest, eliminating the need to expand the entire hive volume. This segmented approach achieves effective vapour distribution to the treatment zone without adding structural complexity to the overall hive.
Solution Approach 2:
Instead of expanding the vapour distribution space horizontally by adding volume, the invention positions the evaporation surface in a vertically optimized location adjacent to the brood nest, utilizing the existing three-dimensional space within the hive more efficiently and avoiding structural expansion.
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 dispenser achieves a high and consistent evaporation rate of formic acid vapour, independent of outdoor climate, reducing health risks and ensuring effective mite control without expanding the hive volume or requiring additional heating.
Implementation Method 1
outwardly delimited in whole or in part by an evaporation surface and bounded by a layer impermeable to the liquid formic acid preparation but highly permeable to its vapour and other gases
Implementation Method 2
evaporation of the liquid formic acid preparation takes place on the evaporation surface
Implementation Method 3
bounded by a layer impermeable to the liquid formic acid preparation but highly permeable to its vapour and other gases
Implementation Method 4
the evaporation surface can be positioned adjacent to the brood nest, independent of external climate
Data Source
AI summary
A dispenser for receiving and evaporating a liquid formic acid preparation for combatting varroa mites in a bee hive, the dispenser including an evaporation surface, an evaporation container; a storage container connected to the evaporation container and sealed from the outside in a vapour-tight manner for storing an entire treatment dose of the liquid formic acid preparation; a closable liquid-conducting connection between the storage container and the evaporation container for transferring the liquid formic acid preparation from the storage container to the evaporation container; wherein the evaporation surface is a gas-permeable, fine-pored membrane with a solid content of less than 70% and continuous, exclusively gas-filled pores with a width of between 10 nm and 1000 nm as part of an outer boundary of the evaporation container, the membrane impermeable to liquid mixtures of formic acid and water and liquid-tight under the dynamic pressure of the liquid formic acid preparation.