Rotatable Guide Member for Freeze-Drying Furnace Plate
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Solution Overview
Problem
Existing freeze-drying furnace designs face challenges in ease of cleaning and dust reduction due to complex mechanisms and potential interference with airtightness, particularly with vial guide members and actuator placement, which increase costs and complexity.
Innovation Solution
The enclosure incorporates rotatable guide members adjacent to the plates that move in concert with vertical plate movement, eliminating the need for an actuator and simplifying cleaning by allowing the guide members to rotate without interfering with plate movement, and includes an external bridge and transfer device for article handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If vial guide members are arranged to guide vials during loading/unloading, then vial placement precision is improved, but device complexity increases due to actuators and sliding mechanisms
Solution Approach 1:
The patent removes the actuator and sliding mechanism from the furnace interior, extracting the complex driving mechanism from the clean room environment. The guide member is simplified to a passive component that rotates freely on a vertical axis, eliminating the need for complex actuators while maintaining the guiding function during plate insertion and removal.
Solution Approach 2:
The guide member is designed to rotate dynamically about a vertical axis as the plate is inserted or removed from the furnace. This dynamic rotation allows the guide member to adapt to the plate's position without requiring complex actuators, simplifying the mechanism while maintaining effective vial guidance during the loading/unloading process.
2Extent of automation
If actuator is placed inside the furnace to drive vial guide members, then automation is improved, but dust generation increases compromising clean room environment
Solution Approach 1:
The actuator is completely removed from the furnace interior and the vial guide mechanism is simplified to a passive rotating component. The automation function is achieved through the natural rotation of the guide member as the plate is manually or automatically inserted, eliminating dust-generating actuators from the clean room environment while maintaining operational efficiency.
Solution Approach 2:
The guide member serves itself by rotating passively in response to plate insertion or removal. This self-service mechanism eliminates the need for external actuators inside the furnace, preventing dust generation while maintaining the ability to guide vials effectively during loading and unloading operations.
3Object-generated harmful factors
If actuator is placed outside the furnace to avoid dust generation, then clean room environment is maintained, but airtightness of furnace is compromised
Solution Approach 1:
By removing the actuator entirely from the system and replacing it with a passive rotating guide member, the patent eliminates the need for complex coupling mechanisms and sliding seals that would compromise airtightness. The simplified guide member rotates freely on a vertical axis without requiring external actuators, maintaining furnace airtightness while preventing dust generation.
4Stability of the object's composition
If bars are attached to each plate to prevent vials from falling, then vial stability is improved, but ease of cleaning deteriorates due to recesses and attachment points
Solution Approach 1:
The patent removes the attached bars from the plate structure entirely, extracting the cleaning obstacles from the system. Vial stability is maintained through the rotating guide member that prevents lateral spreading during insertion, while the plate surface remains smooth and uninterrupted, allowing easy cleaning without recesses or attachment points.
5Productivity
If multiple plates are used in the furnace, then productivity is improved, but cost increases due to attachment of bars to each plate
Solution Approach 1:
By removing the need to attach bars to each individual plate, the patent significantly reduces manufacturing complexity and cost. The unified rotating guide member serves all plates, allowing multiple plates to be used for high productivity without the cumulative cost and complexity of attaching stabilization components to each plate.
Data Source
AI summary
An enclosure includes a furnace 1 and plates 7A to 7D arranged in the furnace 1 and used for placement of articles 5. Each of the plates 7A to 7D is movable vertically in the furnace 1. The enclosure further includes guide members 60A and 60B, each of which is disposed adjacent to a side of one plate of the plates 7A to 7D that is disposed at a loading/unloading position where the articles 5 are allowed to be loaded into or unloaded from the furnace 1. The guide members 60A and 60B guide the articles 5 and are rotatable with vertical movement of the plate.