Pour Chamber Timer Design for Accurate Liquid Dispensing
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Solution Overview
Problem
Existing liquid dispensing systems face challenges in accurately dispensing a measured quantity of liquid due to irregular flow rates and air interference, making it difficult for consumers to use the correct amount of liquid products, such as laundry detergents, leading to dissatisfaction with performance or load capacity.
Innovation Solution
An apparatus comprising a pour chamber with a tapered design, a dam to obstruct the spout entrance, a vent for air equalization, and a timer using a separate timing liquid system to ensure a consistent flow rate and accurate measurement, allowing the user to observe the dispensing volume through visible indicia.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If liquid is dispensed from a container through an open end or dispensing system, then the liquid can flow out, but the flow rate is irregular and air entering the container causes irregular liquid flow
Solution Approach 1:
The vent is positioned and sized to allow air to enter the container in advance of liquid dispensing, equalizing pressure before the liquid flows. This preliminary air entry prevents pressure differentials that would cause irregular flow, ensuring consistent liquid dispensing from the start.
Solution Approach 2:
The vent acts as an intermediary element between the container interior and exterior atmosphere. It mediates the pressure balance by allowing controlled air entry, which in turn enables smooth, irregular-free liquid flow through the dispensing system without direct air-liquid interaction causing turbulence.
2Measurement precision
If a timer system is added to measure liquid dispensing, then measurement accuracy improves, but device complexity increases
Solution Approach 1:
Instead of directly measuring the liquid being dispensed, the system uses a timing liquid that replicates the dispensing process in a controlled manner. The timing liquid flows through an identical path and under identical conditions, creating a measurable copy of the dispensing event that indicates when the desired volume has been reached.
Solution Approach 2:
The timing liquid system serves multiple functions: it measures the dispensing time, indicates when the correct volume has been dispensed, and provides a visual reference through the collection reservoir. This multi-functional approach achieves precise measurement without requiring complex electronic sensors or multiple separate devices.
3Productivity
If the outlet perimeter is large, then liquid can dispense quickly, but the vent exit perimeter must be small to prevent liquid leakage
Solution Approach 1:
The vent system employs different opening sizes at different locations: a large outlet perimeter for rapid liquid dispensing and a small exit perimeter specifically for air venting. This local differentiation of opening sizes allows the system to simultaneously achieve high dispensing speed while preventing liquid leakage through the vent path.
Solution Approach 2:
The vent structure is intentionally asymmetric in its opening dimensions, with the outlet perimeter being significantly larger than the exit perimeter. This asymmetric design creates distinct flow paths: the large outlet accommodates rapid liquid flow while the small, strategically positioned exit restricts liquid leakage but allows air passage, optimizing both productivity and precision.
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
The apparatus provides a steady and accurate dispensing of liquid products, reducing user effort and ensuring the correct amount is used, thereby enhancing product performance and load capacity without over or under-dosing.
Implementation Method 1
a timing orifice (210) connecting said source reservoir and said collection reservoir
Implementation Method 2
air entering the container to replace the liquid displaced may result in irregular liquid flow from the container
Data Source
AI summary
An apparatus and process for dispensing a measured quantity of liquid from a container. The apparatus includes a pour chamber having a dam, a spout, a vent, and a timer that is independent of flow in the pour chamber.