Static Vacuum Floor Nozzle With 30°–60° Undercut Flow Guidance
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Solution Overview
Problem
Existing vacuum cleaner floor nozzles generate significant noise due to flow turbulence and blower operation, with existing noise reduction methods increasing the nozzle's size, which is undesirable for high-quality models.
Innovation Solution
A static vacuum cleaner floor nozzle with an undercut surface inclined between 30° and 60° and a sealing plateau, combined with a suction mouth design that adjusts flow conditions, reduces noise while maintaining a compact form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the suction space is designed as a flow calming space with a larger flow cross section, then flow noise is reduced, but the volume of the vacuum cleaner floor nozzle is greatly enlarged
Solution Approach 1:
The invention transitions from a two-dimensional flow calming approach (enlarging cross-sectional area) to a three-dimensional solution by introducing an undercut surface with specific inclination angle. This creates a volumetric flow guidance structure that calms turbulence without increasing the overall footprint or volume of the nozzle, effectively using spatial dimensionality to resolve the contradiction between noise reduction and compact size.
Solution Approach 2:
The invention changes the geometric parameters of the suction space by introducing an undercut surface with a specific inclination angle (30°-60°) relative to the horizontal. This parameter change creates optimal flow guidance that reduces turbulence and noise while maintaining a compact nozzle volume, avoiding the need for enlarged cross-sectional dimensions.
2Ease of operation
If the suction air flow is deflected at the inlet opening, then the suction function is enabled, but noise-causing turbulence is generated
Solution Approach 1:
The undercut surface with its inclined geometry creates a curved flow path that guides the suction air flow smoothly into the suction chamber. This curved guidance structure reduces abrupt deflections and turbulence, enabling the suction function while minimizing noise-causing flow disturbances.
Solution Approach 2:
The undercut surface is positioned at the inlet opening to pre-guidance the suction air flow before it enters the main suction chamber. This preliminary flow guidance action prepares the air flow in advance, reducing turbulence and noise generation at the critical inlet transition zone while maintaining effective suction functionality.
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
The design achieves effective noise reduction with minimal size increase, enhancing cleaning efficiency and reducing noise pollution.
Implementation Method 1
Due to the inclination of the undercut surface, sound waves running inside the suction chamber are reflected on the undercut surface in the direction of the center of the suction chamber
Data Source
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AI summary
The invention relates to a static vacuum cleaner floor nozzle with a housing (1) with at least one suction mouth (2) arranged on the underside and extending in a working direction (x) and a transverse direction (y). The suction mouth (2) is delimited by a front suction mouth edge (3) and a rear suction mouth edge (4). A suction chamber (5) adjoins the suction mouth (2) at the top, which is connected to a suction channel (6) for guiding a suction air flow. According to the invention, an undercut surface (15) with a width (a) of between 3 mm and 10 mm is arranged in the suction chamber (5), starting from the front edge (3) of the suction mouth. The undercut surface (13) with respect to the horizontal (14) at an angle (α) of 30° to 60°.