Filter Bag Spacing Structure to Prevent Vacuum Inlet Clogging
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Solution Overview
Problem
Vacuum cleaner filter bags made of nonwoven materials often clog the suction opening, leading to pressure loss and reduced suction power due to their softness, which causes them to lie between ribs and obstruct air flow, and existing device-related solutions compromise dust storage capacity.
Innovation Solution
A vacuum cleaner filter bag with increased three-point bending rigidity achieved by connecting nonwoven material layers at the edge with a double weld seam or stiffening elements, ensuring the bag does not obstruct the suction opening and maintaining air flow efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If soft nonwoven material is used for the filter bag, then the filter bag unfolds more easily, but the material lies between the ribs and obstructs air flow
Solution Approach 1:
The filter bag is designed with locally differentiated properties: the main body uses soft nonwoven material for easy unfolding, while specific edge regions incorporate stiffening elements and double weld seams to prevent rib entanglement. This local quality differentiation resolves the contradiction by allowing the material to be soft where needed for unfolding while being stiff where needed to prevent air flow obstruction.
Solution Approach 2:
The filter bag structure is segmented into functional zones: the main filtering area uses soft material, while the outlet edge is segmented with stiffening elements and double weld seams. This segmentation allows different parts of the same filter bag to have different mechanical properties, enabling easy unfolding in the main body while preventing air flow obstruction at the outlet edge.
2Productivity
If the filter bag is placed in front of the suction opening, then dust collection is effective, but the soft material clogs the suction opening and increases pressure loss
Solution Approach 1:
Stiffening elements and double weld seams are incorporated into the filter bag structure during manufacturing, creating a pre-formed rigid outlet edge. This preliminary action ensures that when the filter bag is installed in front of the suction opening, the outlet edge maintains its shape and prevents clogging, thereby maintaining dust collection efficiency while avoiding pressure loss.
Solution Approach 2:
The stiffening elements and double weld seams create a preliminary counteracting force against the suction pressure that would otherwise cause the soft nonwoven material to collapse into the suction opening. This preliminary anti-action prevents the harmful effect of clogging before it can occur during operation.
3Object-generated harmful factors
If device-related solutions like additional cages or rib structures are used, then air flow obstruction is prevented, but the available space for the filter bag is reduced
Solution Approach 1:
The stiffening function is extracted from separate device components (cages, additional ribs) and integrated directly into the filter bag structure through double weld seams and attached stiffening elements. This extraction eliminates the need for additional space-consuming device components while maintaining the air flow prevention function.
Solution Approach 2:
The stiffening elements are merged with the filter bag structure through attachment or integration, combining the filtering function and the air flow prevention function into a single integrated component. This merging eliminates the need for separate space-consuming devices while maintaining both functions.
Data Source
Figure 1A~1
Figure 2
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AI summary
The present invention relates to a vacuum cleaner filter bag made of non-woven material, which has a connection of the non-woven material layers that seals the bag at least at one edge. A spacer is included at least at one point of the edge, which is formed by a double weld seam or stiffening elements that are attached in this area. The characteristic feature of the vacuum cleaner filter bag according to the present invention is an increased three-point bending stiffness.