Tap Liquid Dispensing Flow Control to Prevent Hot Liquid Splashing
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Solution Overview
Problem
Existing faucets with hot water dispensing capabilities face issues with hot liquid splashing due to lack of strainer controls, posing a burn risk, especially in systems with heightened hygiene requirements, and require a method to prevent splashing without prolonging the filling time.
Innovation Solution
The method controls the outlet volume flow rate of the liquid by initially using a lower flow rate to minimize splashing, gradually increasing to a higher flow rate once the container is partially filled, utilizing a centrifugal, membrane, or rotary piston pump, and adjusting flow rate through a metering valve or pump speed, preferably with a direct current motor and pulse width modulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pump operates at full power conveying maximum volume flow rate, then the filling time is reduced, but liquid drops splash out of the tap and container causing burn risk
Solution Approach 1:
The pump operates with dynamically adjusted volume flow rates in two distinct phases: an initial phase with lower flow rate to prevent splashing, and a final phase with higher flow rate to accelerate filling. This dynamic adjustment resolves the contradiction between filling speed and splashing prevention.
Solution Approach 2:
The method applies preliminary action by first conveying liquid at a reduced flow rate during an initial phase to establish stable flow conditions and prevent splashing before transitioning to high-speed filling. This preliminary low-speed phase prepares the system for subsequent high-speed operation without harmful effects.
2Object-affected harmful factors
If strainer or aerator controls are placed at the tap outlet to prevent splashing, then liquid drops are controlled, but hygiene requirements may be compromised
Solution Approach 1:
The invention extracts the splashing prevention function from the tap outlet location (where strainers or aerators would be needed) and relocates it to the pump control system. By controlling the volume flow rate at the pump, the system prevents splashing without requiring strainer or aerator components at the tap outlet, thus maintaining hygiene compliance.
3Object-affected harmful factors
If the initial volume flow rate is too low, then splashing is prevented, but the liquid stream may break into separate jets causing instability
Solution Approach 1:
The system carefully adjusts the initial volume flow rate parameter to a specific range that is sufficient to maintain continuous liquid stream stability while remaining low enough to prevent splashing. This precise parameter control resolves the contradiction between stream stability and splashing prevention.
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 approach effectively prevents liquid splashing while ensuring rapid filling by smoothly transitioning flow rates, reducing the risk of burns and maintaining efficiency.
Implementation Method 1
a pump (3), wherein the liquid is supplied by the pump (3) from the liquid reservoir (2)
Implementation Method 2
The pump used for the delivery can advantageously be a centrifugal pump
Data Source
AI summary
A method for conveying a liquid into a container of a conveying device. The conveying device comprising a liquid reservoir, a pump and a tap. The liquid is supplied by the pump from the liquid reservoir via a tap inlet to the tap. The liquid emerges from a tap outlet of the tap and flows into the container arranged below the tap outlet. An outlet volume flow rate of the liquid flowing from the tap outlet is controlled in such a way that at first the liquid is conveyed with an initial volume flow rate until an initial delivery volume has been conveyed and then the liquid is conveyed with a final volume flow rate, the final volume flow rate being greater than the initial volume flow rate