Vacuum Filter Dust Return Structure for Low-Loss Dust Removal
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Solution Overview
Problem
Existing dust collecting apparatuses for vacuum cleaners suffer from decreased suction efficiency due to dust accumulation on secondary filters, requiring complex structures and separate valves for dust removal, which complicates maintenance and may not fully remove dust from the filter.
Innovation Solution
A dust collecting apparatus with a centrifugal separating portion, a dust receptacle, and a filter portion that includes a dust removing unit and a dust discharge member to forcibly move filter dust back to the centrifugal separating portion, allowing for efficient dust removal and easy maintenance by rotating the filter unit and dust discharge member.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate valve is used to open and close flow passage for dust removal, then dust can be removed from the secondary filter, but the structure becomes complicated and pressure loss increases
Solution Approach 1:
The patent extracts the dust removal function from the main airflow path by creating a separate dust discharge passage that is always open. The dust discharge member can be rotated to either block or open this passage without requiring valves, thereby removing the harmful element (valve complexity) while preserving the beneficial function (dust removal).
Solution Approach 2:
Instead of using a valve to control dust discharge, the patent inverts the approach by using a rotatable dust discharge member that either blocks or opens the passage. This inversion eliminates the need for complex valve mechanisms while achieving the same dust removal function.
2Reliability
If a separate valve is used for dust removal, then dust can be removed from the secondary filter, but pressure loss increases
Solution Approach 1:
The dust removal function is extracted from the main airflow path through a separate dust discharge passage. This separation allows dust to be removed without creating pressure loss in the main airflow, as the dust passage operates independently from the primary suction flow.
3Ease of repair
If components are made detachable for easy maintenance, then repair and replacement become easier, but device complexity increases
Solution Approach 1:
The dust collecting apparatus is segmented into detachable components including the dust receptacle, filter unit, and dust discharge member. This segmentation allows individual components to be easily removed for maintenance without disassembling the entire device, thereby improving ease of repair while keeping the overall structure manageable.
Solution Approach 2:
The dust discharge member serves multiple functions: it blocks the dust discharge passage during normal operation, rotates to open the passage for dust removal, and can be easily detached for maintenance. This multi-functionality reduces the need for separate components, thereby improving maintainability without significantly increasing complexity.
4Productivity
If dust is not completely removed from the secondary filter, then suction efficiency deteriorates, but simple structures may not achieve complete dust removal
Solution Approach 1:
The filter unit is designed to rotate during dust removal operation. This rotation creates mechanical vibration and centrifugal force that effectively dislodge and remove dust particles trapped in the filter pores, achieving complete dust removal without requiring complex high-pressure cleaning systems.
Solution Approach 2:
The patent uses airflow dynamics to remove dust from the filter. When the dust discharge member is rotated to open the passage, air flow is directed through the filter unit, creating pneumatic force that blows dust particles off the filter surface and into the dust discharge passage for collection.
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 enhances user convenience by automatically collecting filter dusts into a receptacle, reducing maintenance complexity, and maintaining suction efficiency by ensuring complete dust removal from the filter, while allowing for a compact and stable vacuum cleaner design.
Implementation Method 1
a centrifugal separating portion (110), a dust receptacle (120) to collect dust which is separated by the centrifugal separating portion
Implementation Method 2
a filter portion (130) having a filter unit (131) separating dust from an air current discharged from the centrifugal separating portion
Data Source
AI summary
A dust collecting apparatus for a vacuum cleaner is provided. The dust collecting apparatus includes a centrifugal separating portion, a dust receptacle to collect dust which is separated by the centrifugal separating portion and a filter portion having a filter unit separating dust from an air current discharged from the centrifugal separating portion. The filtering portion further includes a dust removing unit to detach the filter dust caught in the filter unit, and a dust discharge member to move the filter dust to an upstream of the centrifugal separating portion.