Window Cleaning Nozzle Support Structure for Leak-Tight Assembly
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Solution Overview
Problem
The existing portable hard surface cleaning devices face difficulties in easily mounting and detaching the suction nozzle from the separating member without compromising the liquid-tight connection, due to tilting moments causing the suction channel end section to change position and the sealing element to detach, leading to leaks.
Innovation Solution
The integration of pluggable support elements on the suction nozzle and separating member allows for easy assembly and disassembly while maintaining a liquid-tight connection, as the support elements interlock to resist tilting movements and secure the suction nozzle in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the suction channel end section has very little play relative to the suction channel receiving shaft to prevent the sealing element from detaching, then the liquid-tight connection is maintained, but the assembly and disassembly of the suction nozzle becomes difficult
Solution Approach 1:
The connection system is divided into two independent functional parts: the suction channel end section with sealing element for liquid-tight connection, and the support elements (lugs and recesses) for mechanical positioning and stability. This segmentation allows each part to optimize its function without compromising the other.
Solution Approach 2:
The support elements (lugs and recesses) are positioned at a distance from the suction channel end section, adding a spatial dimension to the connection system. This remote positioning allows the sealing interface to have minimal play for reliability while the support elements provide stability against tilting moments, resolving the contradiction between tight fit and ease of assembly.
2Object-generated harmful factors
If the suction channel end section has very little play relative to the suction channel receiving shaft to prevent leakage, then the sealing element remains in contact with the sealing surface, but the suction nozzle becomes difficult to connect and detach
Solution Approach 1:
The connection system is divided into two independent functional parts: the suction channel end section with sealing element for liquid-tight connection, and the support elements (lugs and recesses) for mechanical positioning and stability. This segmentation allows each part to optimize its function without compromising the other.
Solution Approach 2:
The support elements act as intermediary structures that mediate between the need for tight sealing and ease of assembly. By providing remote mechanical support, they enable the sealing interface to maintain minimal play for leakage prevention while allowing smoother assembly and disassembly operations.
3Adaptability or versatility
If the suction nozzle is subject to tilting moments during use, then the suction channel end section changes position relative to the suction channel receiving shaft, but the sealing element detaches from the sealing surface causing leaks
Solution Approach 1:
The support elements (lugs and recesses) are designed to preemptively counteract tilting moments before they can cause the sealing element to detach. By providing remote mechanical support and stability, they prevent the harmful positional changes that would otherwise compromise sealing integrity.
Solution Approach 2:
The support elements are positioned at a distance from the suction channel end section, adding a spatial dimension to the connection system. This remote positioning allows the sealing interface to have minimal play for reliability while the support elements provide stability against tilting moments, resolving the contradiction between tight fit and ease of assembly.
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 facilitates simple and effortless connection and disconnection of the suction nozzle, prevents leaks, and ensures the sealing element remains in liquid-tight contact, enhancing the usability and reliability of the device.
Implementation Method 1
By means of the suction unit, a suction flow can be generated in the area of the suction opening, under the effect of which a mixture of liquid and air is sucked in via the suction opening
Implementation Method 2
A separating device is arranged in the separating chamber, with the aid of which liquid can be separated from the liquid/air mixture
Data Source
AI summary
The invention relates to a portable hard-surface cleaning appliance (10) for withdrawing, and sucking up, liquid from a hard surface, in particular from a window pane, comprising a suction nozzle (54) with a suction opening (58), which is adjoined by a suction channel (56) and on which is arranged at least one withdrawal lip (64, 66), also comprising a suction subassembly (14), which is in flow connection with the suction channel (56) in order to suck up a liquid/air mixture by way of the suction opening (58), further comprising a separating-off member (42), which is arranged in the flow path between the suction channel (56) and the suction subassembly (14) and has a separating-off chamber (46), in which is arranged a separating-off device (50, 52) for separating off liquid from the liquid/air mixture, and additionally comprising a dirty-liquid holder for accommodating the separated-off liquid, wherein the suction nozzle (54) can be connected in a releasable manner to the separating-off member (42), and wherein a suction-channel end portion (72), which is directed away from the suction opening (58), can be connected in plug-in fashion, with the interposition of a sealing element (74), to a suction-channel-accommodating shaft (70) of the separating-off member (42). In order to develop the portable hard-surface cleaning appliance such that the suction nozzle (54) can be mounted smoothly on the separating-off member (42), without impairing the liquid-tight connection between the suction-channel end portion (72) and the suction-channel-accommodating shaft (70) in the mounted state, the invention proposes that supporting elements (94, 96, 104, 106) which can be plugged one inside the other be arranged on the suction nozzle (54) and on the separating-off member (42), at a distance from the suction-channel end portion (72) and at a distance from the suction-channel-accommodating shaft (70).