Vacuum Cleaner Suction Filter Cleaning with Internal Flow Interception
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Solution Overview
Problem
Existing vacuum cleaner devices face sealing issues during filter cleaning operations due to the need for external sealing systems to prevent vacuum loss, as the flow interception mechanism is typically located outside the suction flow chamber.
Innovation Solution
A device with flow interception means that rotate around an axis, utilizing a linear actuator with a return spring to transform linear motion into rotary motion, allowing for seamless air flow interruption and cleaning within the suction flow chamber, eliminating the need for external sealing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a linear solenoid actuator with a piston-plate configuration is used to intercept the suction flow, then the valve can effectively stop or reactivate the flow, but external sealing systems are required to prevent vacuum loss and air leaks
Solution Approach 1:
The patent merges the flow interception mechanism with the suction flow chamber by positioning the shutter valve entirely inside the chamber. The shutter rotates on an axis within the chamber and directly blocks the suction flow path, eliminating the need for external sealing systems. This integration combines the valve function with the existing chamber structure, resolving the contradiction between reliable flow interception and device complexity.
Solution Approach 2:
The shutter acts as an intermediary element that rotates within the suction flow chamber to control the flow path. By using a rotary shutter instead of a linear piston, the invention creates a sealing interface that rotates within the chamber boundaries, serving as a mediator between the filter unit and the suction motor while maintaining vacuum integrity without external seals.
2Ease of manufacture
If the flow interception mechanism is positioned outside the suction flow chamber, then the valve structure can be simpler, but external sealing systems are needed to prevent vacuum loss
Solution Approach 1:
The invention combines the valve structure with the suction flow chamber by positioning the shutter entirely inside. This merging eliminates the boundary between internal and external components, removing the need for external sealing systems while maintaining structural simplicity. The shutter rotates on an axis within the chamber, creating a self-contained flow control mechanism that prevents vacuum loss without adding external sealing complexity.
3Reliability
If a piston-plate valve is used to block the suction flow, then the flow can be effectively stopped, but the sealing element must prevent air leaks along the piston
Solution Approach 1:
Instead of using a linear piston that moves back and forth requiring sealing along its length, the invention inverts the approach by using a rotary shutter. The shutter rotates to block or open the flow path, creating a sealing interface at the rotation axis rather than along a linear path. This inversion eliminates air leaks along the piston by replacing linear motion with rotary motion, maintaining effective flow blocking while preventing harmful air leaks.
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 configuration ensures tighter flow interception, reduces pumping power requirements, and prevents air flow obstruction, resulting in energy savings and improved sealing without external sealing systems.
Implementation Method 1
a linear actuator with a return spring to transform linear motion into rotary motion
Data Source
Figure 1~1d
Figure 2a
Figure 2b
AI summary
A cleaning device for the suction filters of a vacuum cleaner equipped with two separate filtering units, each filtering unit being associated with a mechanism for opening and closing the air passage duct, so that the suction flow can be interrupted through a filter unit only at a time, thus allowing cleaning to start in one filter unit at a time, while dirty air continues to be filtered through the other unit. According to an embodiment of the present invention, the entire flow interception device, comprising an opening and closing element of the air passage duct and an independent actuator for each filtering unit, is arranged inside the suction chamber, so that it is not necessary to provide air sealing systems towards the outside of the suction chamber. In particular, the flow interception device is configured to allow the closing or opening of the air passage duct by a transformation from linear to rotary motion.