Quick-Release Air Knife Structure for Easy Shrink Oven Servicing
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Solution Overview
Problem
Existing air knife structures in package thermal-shrinking ovens are difficult to service, replace, and mount/dismount, leading to increased costs, labor, and inconvenience, due to complex bolt-fastening and structure modifications, which hinder efficient operation and economic value.
Innovation Solution
A quick-release air knife structure featuring a fixing ring with notches and fitting blocks, allowing air knife tubes to connect and disconnect through rotation, eliminating the need for tools and significant structure modifications, and incorporating elastic airflow blocking boards for adjustable airflow control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If air knives are fixedly connected to the package thermal-shrinking oven using bolt fastening, then the air knives are securely attached, but the mounting and dismounting process becomes complicated and time-consuming
Solution Approach 1:
The air knife assembly is divided into separable components: the air knife tube with fitting blocks and the fixing ring with corresponding notches. This segmentation allows the air knife to be quickly attached and detached without tools, resolving the contradiction between secure attachment and ease of operation.
Solution Approach 2:
The connection mechanism transitions from static bolt fastening to a dynamic quick-release system. The fitting blocks engage with notches through a rotating motion, enabling the air knife to be securely fixed during operation yet easily removed when needed, thus improving both reliability and operational ease.
2Reliability
If air knives are fixedly connected using bolt fastening, then the connection is stable, but the fabrication cost increases due to structure modifications
Solution Approach 1:
The connection system is segmented into simple, standardized components (fitting blocks and notches) that require minimal structural modification to the air knife body. This reduces fabrication complexity and cost while maintaining stable connection through the engagement geometry.
Solution Approach 2:
Instead of modifying the air knife structure to accommodate complex fastening mechanisms, the invention inverts the approach by adding simple notches to a separate fixing ring. This reversal minimizes modifications to the air knife itself, reducing fabrication costs while ensuring stable connection.
3Reliability
If the entire package thermal-shrinking oven is replaced when air knives fail, then the air knife problem is solved, but unnecessary costs increase
Solution Approach 1:
The air knife assembly is segmented as a独立的可更换单元 (independent replaceable unit) from the main oven system. When air knives fail, only the specific air knife tube needs to be detached and replaced by rotating it out of the fixing ring, rather than replacing the entire oven. This significantly reduces maintenance costs while ensuring continuous functionality.
Solution Approach 2:
The air knife is extracted as a separate serviceable component from the integrated oven system. The quick-release mechanism allows the air knife to be easily removed and replaced independently, eliminating the need to replace the entire expensive oven system and thereby reducing maintenance losses.
4Reliability
If sophisticated bolt-fastening seat structure is designed, then the air knife can be securely fastened, but the device complexity increases
Solution Approach 1:
The fastening function is segmented into simple geometric features: fitting blocks on the air knife and corresponding notches on the fixing ring. This segmentation eliminates the need for sophisticated bolt-fastening seat structures while maintaining secure fastening through the engagement of these simple shapes.
Solution Approach 2:
Instead of designing a complex fastening seat structure on the air knife, the invention inverts the approach by placing simple notches on a separate fixing ring. This reversal simplifies the air knife structure while maintaining secure fastening, thereby reducing overall device complexity.
Data Source
AI summary
A quick-release air knife of a package thermal-shrinking oven includes at least one fixing ring, at least one pair of fixing elements, a plurality of air knife tubes, and air knife blades. The fixing ring is at least formed, in an interior thereof, with a through hole and at least one pair of notches and fixing holes are formed in a periphery of the through hole. The fixing elements respectively extend through the fixing holes to connect to a bottom portion of a hot airflow combination box arranged on a top portion of a package thermal-shrinking oven. A top portion of each of the air knife tubes is provided with a connecting portion and at least one pair of fitting blocks. The fitting blocks of the air knife tube match with the notches of the fixing ring, and a top end of the air knife tube is pushed upwards to pass through the through hole and the notches and then rotated by an angle to have the fitting blocks fit to a top surface of the fixing ring and the connecting portion of the air knife tube connected to the bottom portion of the hot airflow combination box for introducing a hot airflow into the air knife tube. The air knife blades are combined to the exteriors of the air knife tubes to guide a path of discharging the hot airflow out of the air knife tubes. Thus, a quick-release air knife structure that is operable through clockwise or counterclockwise direction to have the air knife tube to connect to or disconnect from the bottom portion of the hot airflow combination box.