Drained plumbing system for an ice maker
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Solution Overview
Problem
Forming ice with appliances plumbed to water supplies is challenging due to accumulated solids from tap water, which negatively affect ice maker performance, especially in water recirculation systems.
Innovation Solution
A plumbing system for ice makers that includes a supply line, a recirculation loop, and valves to regulate liquid flow, featuring a recirculation check valve to prevent backward flow and a drain check valve with lower opening pressure than the recirculation check valve to facilitate draining and prevent fouling by impurities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If water is recirculated through the ice maker, then ice production efficiency is improved, but accumulated solids from tap water cause fouling and negatively affect performance
Solution Approach 1:
The system divides the water supply into two separate paths: a recirculation path for efficient ice production and a drain path for removing impurities. The recirculation loop handles fresh water supply to the ice maker while the drain line separately handles waste water removal, preventing mixed consequences of fouling while maintaining productivity.
Solution Approach 2:
The harmful accumulated solids are extracted from the system through the drain line that connects to the drain check valve. This separate drainage path removes impurities before they can foul the recirculation system, allowing the recirculation loop to maintain high ice production efficiency without contamination.
2Reliability
If check valves are used to prevent backward flow, then system reliability is improved, but device complexity increases due to multiple valves
Solution Approach 1:
The check valves are designed to automatically control flow direction based on pressure differentials without requiring external control mechanisms. The drain check valve and recirculation check valve self-regulate to prevent backward flow, maintaining reliability while minimizing the need for additional control components.
Solution Approach 2:
The system combines multiple valve functions into a coordinated arrangement where the drain check valve and recirculation check valve work together with the recirculation pump to manage both drainage and recirculation flows. This integrated approach achieves reliable flow control with a minimal number of essential components.
3Productivity
If drain check valve opening pressure is lower than recirculation check valve, then draining efficiency is improved, but risk of unintended drainage increases
Solution Approach 1:
The system uses different opening pressure parameters for the drain check valve and recirculation check valve to differentiate their functions. The drain check valve has a lower opening pressure optimized for efficient waste removal, while the recirculation check valve has a higher opening pressure to prevent unintended drainage during normal operation. This parameter differentiation allows each valve to perform its specific function reliably.
Solution Approach 2:
The pressure differential feedback mechanism ensures that the drain check valve only opens when sufficient pressure builds up to indicate actual drainage is needed. The recirculation check valve maintains higher pressure to prevent backflow. This feedback-based pressure control allows efficient drainage when required while preventing unintended drainage during normal recirculation operation.
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 effectively recirculates water through the ice maker, preventing fouling and maintaining performance by ensuring fresh water supply and efficient drainage, thus addressing the issue of accumulated impurities and improving ice production.
Implementation Method 1
A recirculation check valve is coupled to the recirculation line. The recirculation check valve blocks backward liquid flow through the recirculation line.
Implementation Method 2
A drain check valve is coupled to the recirculation outlet line. The drain check valve blocks liquid flow into the recirculation loop through the recirculation outlet line.
Implementation Method 3
An ice maker, a reservoir and a pump are coupled to the recirculation loop. The pump is operable to recirculate liquid from the reservoir through the ice maker via the recirculation loop.
Implementation Method 4
a dispense valve coupled to the supply line. The dispense valve is operable to regulate liquid flow through the supply line to the dispense point.
Implementation Method 5
An ice maker valve is coupled to the recirculation line. The ice maker valve is operable to regulate liquid flow through the ice maker on the recirculation line.
Data Source
AI summary
A plumbing system for an ice maker may include a supply line extending to a dispense point and a dispense valve coupled to the supply line. An ice maker is coupled to the recirculation line, and a pump is also coupled to the recirculation line. The pump is operable to recirculate liquid through the ice maker via the recirculation line. The plumbing system also include features for draining water from the recirculation line.