Drying Agent Cartridge Axial Spring Compression
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Solution Overview
Problem
The existing drying agent cartridges for air treatment systems in commercial vehicles have complex structures that require significant space, leading to inefficiencies in drying capability and cartridge lifetime due to the need for complex mechanisms to generate compression forces and prevent desiccant loss.
Innovation Solution
A drying agent cartridge design where the upper and lower housings are permanently connected, allowing the desiccant container to be axially movable, with a spring pressing them apart to generate compression, reducing structural complexity and enabling a reusable cover for protection and airflow, and incorporating features like ultrasonic welding for a durable unopenable connection and mesh for airflow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a movable drying agent cap is used to generate compression force on the drying agent, then the compression force can be applied to the desiccant beads, but the structure becomes complex and requires significant space
Solution Approach 1:
The patent combines the upper housing and lower housing into a single integrated housing structure. The spring is positioned to press directly against the drying agent container bottom, eliminating the need for a separate movable cap mechanism. This merging of components simplifies the overall structure while maintaining the compression function.
Solution Approach 2:
The patent removes the movable cap component entirely from the design. Instead, the spring directly contacts the drying agent container bottom, extracting the intermediate cap element that caused structural complexity. The compression force is transmitted directly from the spring through the container bottom to the drying agent.
2Force
If a complex structure with movable cap and spring mechanism is used, then compression force can be generated, but the height of the drying agent cartridge increases
Solution Approach 1:
By merging the housing components and eliminating the movable cap, the vertical space required for the compression mechanism is reduced. The spring operates within the existing housing volume, pressing directly on the drying agent container bottom, thereby reducing the overall cartridge height.
3Speed
If the upper housing is made permeable to air, then airflow can pass through for drying function, but desiccant beads may escape from the container
Solution Approach 1:
The upper housing is designed with local quality differentiation: the main body remains permeable to allow airflow for drying function, while specific regions incorporate features such as a mesh layer or reduced opening sizes to prevent desiccant bead escape. This localized modification maintains airflow performance while adding containment capability.
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 design simplifies the structure, reduces space requirements, increases the desiccant volume, and enhances drying capability while ensuring the desiccant remains contained, thereby extending the cartridge's lifetime and improving airflow efficiency.
Implementation Method 1
a spring (26) pressing against the lower housing (22) and generating a compression force on the drying agent (14)
Implementation Method 2
a drying agent (14) contained in a drying agent container (12), the desiccant being constituted by desiccant beads (16)
Data Source
Figure 1
AI summary
The invention relates to a drying agent cartridge (10) for an air treatment system for a commercial vehicle, wherein a cover covers said drying agent cartridge (10) when being mounted on said air treatment system, comprising a drying agent container (12) containing drying agent (14), an upper housing (18) being in contact with the upper end portion of the drying agent container (12) and preventing drying agent (14) from escaping from drying agent container (12), a lower housing (22) for interfacing said drying agent cartridge (10) with said air treatment system and supporting said drying agent container (12), and a spring (26) pressing against said lower housing (22) and generating a compression force on said drying agent (14), wherein said upper housing (18) being permanently connected with said lower housing (22) in a fixed position relative to each other, and wherein said drying agent container (12) being axially movable in relation to the upper housing (18) and the lower housing (22), wherein said spring (26) presses the lower housing (22) and the drying agent container (12) apart from each other. Furthermore, the invention relates to an air treatment system for a commercial vehicle, comprising such a drying agent cartridge (10) and a removable cover covering said drying agent cartridge (10).