Pull-Out Mixing Tap Nozzle With Dual Water Conduits
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Solution Overview
Problem
Existing mixing taps with pull-out nozzles do not effectively handle the dispensing of very hot or boiling water without mixing it with cold water, as they share a common water conduit, which can contaminate the fresh water intended for consumption.
Innovation Solution
Incorporating a second water conduit in the hose with a nozzle that is separate from the first water conduit, allowing for the dispensing of water from a dedicated water source, such as boiling water, without mixing it with the mixed water from the first conduit, and providing a ballast element to facilitate the hose's movement between normal and pulled-out positions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single water conduit is used for both mixed water and dedicated water (boiling water), then the device complexity is reduced, but the water quality purity deteriorates due to contamination between different water types
Solution Approach 1:
The single water conduit is segmented into two separate conduits: a first water conduit for mixed water and a second water conduit for dedicated water (boiling water). This segmentation prevents contamination between different water types while maintaining manageable device complexity through modular construction.
Solution Approach 2:
The dedicated water pathway is extracted from the mixed water conduit system. The second water conduit is separated from the first, allowing dedicated water to flow independently without mixing with cold or hot water from the mixing device, thus ensuring water quality purity.
2Reliability
If a second water conduit is added for dedicated water, then the water quality purity is improved, but the device complexity increases
Solution Approach 1:
The first and second water conduits are merged at the nozzle assembly, allowing both mixed water and dedicated water to be dispensed from a single spout. This merging reduces the need for separate dispensing mechanisms and minimizes overall device complexity despite having two separate conduits.
Solution Approach 2:
The single spout serves multiple functions by receiving both the first water conduit (mixed water) and the second water conduit (dedicated water). This multi-functionality allows the tap to dispense different water types through a unified interface, simplifying the user experience and reducing structural complexity.
3Ease of operation
If the hose is made flexible to enable pull-out movement, then the ease of operation is improved, but the structural stability deteriorates
Solution Approach 1:
The hose is constructed as a flexible conduit that can be pulled out and retracted while maintaining its structural integrity. The flexible material allows movement between stored and extended positions without compromising the water-tight seal or the overall stability of the water delivery system.
Data Source
AI summary
A mixing tap for dispensing water includes a tap body having a fitting end for fitting the tap body in or on a fitting opening, an spout fitted in or on the tap body and provided with a dispensing end, a mixing device arranged in the tap body. The mixing device includes a first inlet for cold water, a second inlet for hot water and an outlet for mixed water, and a hose having a nozzle. The mixing tap has an accommodation duct which runs from the fitting end to the dispensing end for receiving at least a portion of the hose. The hose is displaceable with respect to the spout between a pulled-out position, in which the hose protrudes with respect to the dispensing end, and a normal position, in which the hose does not extend with respect to the dispensing end or to a lesser degree.