Dishwasher Top Spray Head Cage Mount to Prevent Dirt Buildup
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Solution Overview
Problem
The existing dishwasher roof spray devices face reliability issues due to dirt accumulation at the rotatable mounting area of the spray head, compromising the even distribution of rinsing liquor and operation efficiency.
Innovation Solution
The spray head is rotatably mounted within a cage, eliminating the axis connection with the hydraulic system, which reduces dirt accumulation and simplifies construction, with a central baffle surface ensuring loss-free distribution of washing liquor through channels to the items being washed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the spray head is rotatably mounted with an axis connection to the hydraulic system, then the spray head can rotate to distribute rinsing liquor evenly, but dirt accumulates in the rotatable mounting area compromising reliability
Solution Approach 1:
The patent extracts the axis connection between the spray head and hydraulic system by introducing a free section (flexible hose) that connects the cage to the hydraulic system. This removes the rotatable mounting point from the hydraulic connection area, eliminating the dirt accumulation zone while preserving spray head rotation capability through the flexible coupling.
2Ease of manufacture
If an axis connection is used between the spray head and hydraulic system, then the spray head can be supplied with washing liquor, but the construction becomes complex and assembly is difficult
Solution Approach 1:
The patent replaces the mechanical axis connection system with a flexible hose (free section) that allows rotational movement without requiring a complex water-carrying axle connection. This substitution simplifies the construction by eliminating bearings, seals, and rotating joints while maintaining the functional connection between the spray head and hydraulic system.
3Reliability
If the spray head is rotatably mounted in a cage without axis connection, then dirt accumulation is reduced, but the spray head needs effective washing liquor conduction
Solution Approach 1:
The patent introduces a cage as an intermediary structure that holds the spray head and provides a controlled environment for washing liquor conduction. The cage with its receptacle and the spray head's central recess work together to ensure efficient liquor transfer from the free section through the spray head channels, minimizing loss while maintaining the dirt-free rotatable mounting.
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 the reliability of the roof spray device by preventing dirt accumulation and ensuring even washing liquor distribution, improving operational efficiency and simplifying assembly.
Implementation Method 1
a plurality of guide elements form a plurality of channels through which the washing liquor can be evenly distributed during operation onto the items to be washed or cutlery
Implementation Method 2
the central impact surface is designed to conduct washing liquor into the channels, so that it is ensured that the washing liquor is essentially loss-free from the free section via the central impact surface into the channels
Implementation Method 3
the spray head rotates, so that an even distribution of the rinsing liquor on the dishes to be cleaned is ensured
Data Source
Figure 1~3
AI summary
The invention relates to a dishwasher, particularly a household dishwasher, comprising a hydraulic system (2) and at least one top spray device (4), which is disposed above at least one washing product basket, particularly a cutlery drawer, and can be supplied with a washing solution by means of the hydraulic system (2), and further comprising a rotatable spray head (6), which is attached to the hydraulic system (2) by means of a cage (8). The invention is characterized in that the spray head (6) is supported rotatably in the cage (8). The invention further comprises a top spray device for installation in a dishwasher and a spray head and a cage for such a top spray device.