A dishwasher
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Solution Overview
Problem
Dishwashers struggle to effectively clean a wide variety of crockery combinations due to limitations in design and functionality, as manufacturers cannot produce an unlimited number of layouts to accommodate different types of crockery and encrustation levels, leading to suboptimal cleaning performance.
Innovation Solution
The dishwasher incorporates two crockery baskets with main and auxiliary sprayer devices, where the auxiliary sprayer devices can be selectively activated and positioned to target specific areas for enhanced cleaning, utilizing a single type of washing chamber and feed pipe, with shutoff valves controlling the washing liquid supply to optimize cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manufacturers produce multiple dishwasher layouts to accommodate different crockery types, then cleaning effectiveness for various crockery combinations is improved, but device complexity and production costs increase
Solution Approach 1:
The patent implements movable and adjustable sprayer devices that can change their position and orientation dynamically. The auxiliary sprayer can be moved between different positions (first position for targeting the first crockery basket, second position for targeting the second crockery basket) and adjusted to different orientations, allowing a single dishwasher layout to adapt to various crockery configurations and encrustation levels without requiring multiple fixed layouts
Solution Approach 2:
The auxiliary sprayer device is designed to perform multiple functions: it can target different crockery baskets, adjust to different orientations, and be selectively activated based on the type of crockery and encrustation level. This multi-functional capability allows a single sprayer device to replace what would traditionally require multiple specialized sprayer configurations, thereby reducing device complexity while maintaining versatility
2Productivity
If auxiliary sprayer devices are added to provide targeted cleaning, then cleaning performance is improved, but device complexity increases
Solution Approach 1:
The auxiliary sprayer device incorporates movable and adjustable features that allow it to dynamically reposition and reorient itself to target different areas. This dynamic capability enables a single auxiliary sprayer to perform the function of multiple fixed sprayers, improving cleaning performance without proportionally increasing device complexity
Solution Approach 2:
The auxiliary sprayer device is selectively activatable based on the detected type of crockery and encrustation level. The system automatically determines when and where auxiliary cleaning is needed, allowing the auxiliary sprayer to activate only when required rather than operating continuously. This self-service approach optimizes cleaning performance while minimizing the operational complexity of managing multiple sprayer devices
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 allows for effective cleaning of various crockery combinations by providing targeted dirt removal and encrustation management, improving overall cleaning performance without the need for multiple dishwasher layouts or designs.
Implementation Method 1
a pump (4) which can be connected to a source of washing liquid... The pump (4) supplies washing liquid to the sprayer devices (7, 8)
Implementation Method 2
Heating components are also provided, usually electrical resistances, active on the delivery pipe in order to heat the washing liquid during one or more stages of the wash cycle
Implementation Method 3
One or a pair of sprayer devices... provide for spraying the crockery baskets, and therefore the crockery, with washing liquid
Implementation Method 4
The sprayer devices are placed in rotation by the same washing liquid which, by coming out of the nozzles, transmits angular moments to the two arms causing their rotation about the rotation axis
Data Source
Figure 1
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Figure 3
AI summary
A dishwasher comprises a washing chamber (2) having a bottom wall (2a) and an opening, at least one crockery basket (3) arranged to come out, at least partly, from the washing chamber (2), a pump (4) that can be connected to a source of washing liquid, connected to a delivery pipe (5) placed beneath the bottom wall (2a) of the washing chamber (2), the delivery pipe (5) being in fluid communication with a feed pipe (6) placed inside the washing chamber (2), at least one main sprayer device (7), rotatable about a first rotation axis (X1), being in fluid connection with the feed pipe (6), and at least one auxiliary sprayer device (8) being rotatable about a second rotation axis (X2) and being in fluid communication with the pump (4). A supply pipe (9) is placed in fluid communication with the delivery pipe (5) and the auxiliary sprayer device (8) in order to supply the latter with washing liquid, the supply pipe (9) being developed beneath the bottom wall (2a) of the washing chamber (2).