Precise fill dispensing system for an appliance
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Solution Overview
Problem
Existing dispensing systems for ice making assemblies in refrigerators lack precision in delivering water volumes, leading to unsatisfactory ice formation.
Innovation Solution
A dispensing system with a housing containing a chamber divided into two reservoirs by a movable piston, allowing precise control of water flow through multiple valves and conduits to achieve a controlled volume of water dispensed to the ice making assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional flow control devices are used to deliver water to the ice making assembly, then the device complexity is low, but the manufacturing precision of water volume delivery is poor
Solution Approach 1:
The chamber is divided into two separate reservoirs (first reservoir and second reservoir) by a piston, allowing independent control and measurement of water volumes delivered to different portions of the ice making assembly. This segmentation enables precise control of water distribution while maintaining manageable system complexity through modular reservoir management.
Solution Approach 2:
The piston is made movable between first and second positions rather than being fixed, allowing dynamic adjustment of the water divide line. This enables the system to adapt water delivery precision to different operating conditions while the controlled movement mechanism maintains overall system manageability.
2Manufacturing precision
If a flow control meter is used to meter the volume of water dispensed, then the device complexity increases, but the manufacturing precision of water volume delivery remains insufficient
Solution Approach 1:
The piston acts as an intermediary mechanism between the water supply and the ice making assembly, providing precise volume control through its position-dependent water division. This mechanical intermediary achieves accurate metering without requiring complex electronic flow control meters, balancing precision with system simplicity.
Solution Approach 2:
The invention replaces electronic or complex mechanical flow control meters with a simpler piston-based mechanical division system. The piston's physical position directly determines water volume allocation, substituting complex measurement devices with a straightforward mechanical volumetric division approach.
3Manufacturing precision
If multiple valves and conduits are added to achieve precise water control, then the manufacturing precision of water volume delivery improves, but the device complexity increases
Solution Approach 1:
The piston serves multiple functions simultaneously: it divides the chamber into two reservoirs, controls the divide line position, and enables independent water delivery control to different zones. This multi-functionality reduces the need for separate control mechanisms for each function, offsetting the added complexity of multiple valves and conduits with consolidated component performance.
Solution Approach 2:
The piston pre-divides the water volume into two reservoirs before delivery, establishing precise volume allocations in advance. This preliminary action of water division eliminates the need for complex real-time flow adjustment mechanisms during delivery, as the volume control is already established by the piston position.
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 system enables precise and controlled dispensing of water, ensuring accurate ice formation and improving the overall efficiency of the ice making process.
Implementation Method 1
a piston movable within the chamber of the housing between a first position and a second position, the piston fluidly separating a first reservoir and a second reservoir of the chamber
Implementation Method 2
a first valve positioned along the first inlet conduit and movable between an open position and a closed position, the first valve configured to selectively allow fluid to flow from the water supply to the first reservoir of the chamber
Data Source
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AI summary
A dispensing system for dispensing a precise or controlled volume of fluid to a downstream assembly of an appliance is provided. As one example, the downstream assembly may be an ice making assembly and the appliance may be refrigerator appliance. In one example aspect, a dispensing system includes a housing that defines a chamber. A piston is movable within the chamber. The dispensing system also includes a plurality of valves that may be moved between various positions to move the piston between various positions. When the piston is moved within the chamber, the piston displaces a precise or controlled volume to the downstream assembly.