Inverted Refill Dispenser Valve for Mess-Free Replacement
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Solution Overview
Problem
Existing soap dispensers often require complex and messy procedures for replacing refill units, especially when not fully emptied, which can damage the dispensing mechanism and inconvenience users.
Innovation Solution
A dispenser design featuring a base unit with a hollow spigot and annular seal, allowing the refill unit to be inserted in an inverted configuration, with a valve element biased by resilient members, creating a mess-free and simple replacement process through castellations and pressure relief valves for efficient liquid flow and air management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the refill unit is replaced using conventional methods, then the dispensing mechanism can be maintained, but the replacement process becomes complex and messy, especially when the refill is not fully emptied
Solution Approach 1:
The refill unit is designed to be inserted in an inverted configuration with its outlet at the lowermost end, reversing the conventional orientation. This inversion allows the outlet to be positioned below the spigot, enabling the spigot to lift the valve element and open the flow path during insertion, while the annular seal prevents leakage during the replacement process
Solution Approach 2:
A valve element is introduced as an intermediary component between the refill unit outlet and the spigot. The valve element is biased onto the annular wall by resilient members and is lifted by the spigot during insertion to define a flow path. This intermediary mechanism controls liquid flow and prevents mess during refill replacement
2Reliability
If a valve element is used to control liquid flow, then leakage can be prevented, but the structure becomes more complex requiring additional components
Solution Approach 1:
The valve element is merged with the annular wall structure, where the annular wall projects into the refill unit and the valve element is biased directly onto it. The resilient members are integrated into this assembly, creating a compact valve mechanism that prevents leakage without requiring separate complex valve components
Solution Approach 2:
The valve element is automatically actuated by the insertion motion itself. As the refill unit is inserted, the spigot automatically lifts the valve element to open the flow path, and the resilient members automatically bias the valve element onto the annular wall to close it. This self-actuating mechanism eliminates the need for external valve control systems
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
Enables easy, mess-free replacement of refill units regardless of fill level, maintaining a sealed system and preventing leakage, thus simplifying the refill process and extending the dispenser's usability.
Implementation Method 1
the valve element is biased by at least one resilient member which is preferably joined at one end to the valve element and at the other end at a location radially outwardly of and below the innermost end of the annular wall
Implementation Method 2
the annular seal to seal between the spigot and the annular wall
Data Source
AI summary
A dispenser including a base unit with an actuation mechanism for dispensing liquid and a refill unit insertible into the base unit in an inverted configuration with its outlet lowermost for the supply of liquid to the base unit. The refill unit includes an annular wall projecting into the refill unit and defining an outlet from the refill unit, the annular wall being closable at its innermost end by a valve element biased onto the annular wall. The base unit includes a hollow spigot and an annular seal surrounding and spaced from the top of the spigot whereby insertion of the refill unit into the base unit causes the spigot to enter the annular wall and to lift the valve element from the annular wall to define a flow path from the refill unit, and the annular seal to seal between the spigot and the annular wall.