Ice maker with push notification to indicate when maintenance is required
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Solution Overview
Problem
Ice makers lack effective mechanisms to detect and communicate maintenance needs, such as condenser cleaning, descaling, and water filter replacement, leading to reduced performance and efficiency.
Innovation Solution
An ice maker with a controller that tracks baseline times for freeze, harvest, and fill cycles, and sends notifications to connected portable devices when these times exceed thresholds, recommending maintenance actions like cleaning the condenser, descaling, or replacing the water filter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the ice maker operates continuously without maintenance monitoring, then ice production continues, but performance degrades due to undetected maintenance needs
Solution Approach 1:
The controller continuously monitors freeze time, harvest time, and fill time parameters and compares them against baseline values. When deviations exceed predetermined thresholds, the system generates maintenance notifications sent to portable electronic devices, creating a closed-loop feedback system that enables timely maintenance intervention while maintaining continuous ice production
Solution Approach 2:
The system establishes baseline performance parameters during initial operation and uses these baselines to predict future maintenance needs. By monitoring trends in freeze time, harvest time, and fill time before they cause significant performance degradation, the system enables proactive maintenance scheduling that prevents reliability issues before they impact ice production
2Reliability
If maintenance is performed frequently based on fixed schedules, then reliability is maintained, but unnecessary maintenance actions increase device complexity and operational disruption
Solution Approach 1:
Instead of using fixed time-based maintenance schedules, the system dynamically adjusts maintenance timing based on actual performance parameter changes. The controller monitors freeze time, harvest time, and fill time parameters and triggers maintenance notifications only when these parameters deviate from baselines by predetermined thresholds, enabling condition-based maintenance that adapts to actual device wear and operating conditions
3Measurement precision
If the ice maker monitors multiple performance parameters, then maintenance detection accuracy improves, but the system complexity increases
Solution Approach 1:
The monitoring system is divided into distinct functional modules, each responsible for measuring specific parameters: freeze time monitoring, harvest time monitoring, and fill time monitoring. Each parameter is independently measured and compared against its own baseline with dedicated threshold settings, allowing the system to maintain high detection accuracy while keeping each monitoring subsystem relatively simple and manageable
4Measurement precision
If baseline parameters are established after initial cycles, then accurate maintenance thresholds are achieved, but the system requires extended initial operation time
Solution Approach 1:
The controller automatically establishes baseline parameters for freeze time, harvest time, and fill time during the initial operation cycles without requiring manual intervention. These baselines are stored in memory and used immediately for comparison with subsequent performance data, enabling the system to transition to accurate condition-based monitoring after a brief automatic characterization period
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 identifies and communicates necessary maintenance, ensuring optimal ice production by addressing issues before they significantly impact performance, thus extending the life and efficiency of the ice maker.
Implementation Method 1
a refrigeration system (12) comprising a compressor (15), a condenser (16), and an evaporator (21)
Implementation Method 2
a condenser (16) to which air is not supplied during operation of the ice maker
Implementation Method 3
the controller is adapted to determine a baseline freeze time, a baseline harvest time, and/or a baseline fill time
Data Source
AI summary
An ice maker for forming ice having a refrigeration system, a water system, and a control system. The refrigeration system includes a compressor, a condenser, and an evaporator. The water system includes a water filter and a sump to hold water to be made into ice. The control system includes a controller adapted to determine a baseline freeze time, a baseline harvest time, and/or a baseline fill time after an initial set of ice making cycles and is further adapted to compare subsequent harvest times, freeze times, and/or fill times to the baseline freeze, harvest, and/or fill times to determine whether the ice maker needs maintenance. If controller determines that ice maker needs maintenance, controller can push a notification to a portable electronic device connected to the ice maker.