Refrigerator with automatic liquid dispenser
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Solution Overview
Problem
Conventional refrigerators lack an efficient mechanism for automatically filling containers with liquid, such as water pitchers, within the appliance, leading to user inconvenience and potential stale liquid issues due to lack of monitoring and dispensing control.
Innovation Solution
A refrigerator system featuring a liquid dispenser on the interior door surface with a sensor to detect the container's presence and liquid level, controlling the dispensing process and including a timer to alert for stale liquid conditions, ensuring the container is filled to a user-set level and preventing stale water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual filling of containers is used, then device complexity is reduced, but user convenience deteriorates and productivity decreases
Solution Approach 1:
The system enables self-service by automatically detecting when a container is placed on the shelf and initiating the filling process without user intervention. The sensor detects container presence and the control system automatically activates the dispenser to fill the container, eliminating the need for manual operation while maintaining simplicity.
Solution Approach 2:
The system uses feedback from sensors to monitor container presence and liquid levels, then adjusts dispensing accordingly. The sensor signals the control system about container status, and the control system responds by regulating the dispenser to achieve proper fill levels, creating a closed-loop automatic filling process.
2Productivity
If automatic dispensing is implemented, then productivity is improved, but device complexity increases
Solution Approach 1:
The automatic dispensing system operates autonomously by detecting container placement and initiating filling without user action. The sensor and control system work together to automatically manage the entire filling process, significantly improving productivity while keeping the added complexity minimal through automated self-service operation.
Solution Approach 2:
The system performs preliminary detection of container presence before initiating dispensing. The sensor detects the container in advance and triggers the control system to prepare and activate the dispenser, ensuring the filling process begins automatically and efficiently as soon as the container is in position.
3Reliability
If liquid dispensing is unmonitored, then device complexity is reduced, but reliability of liquid freshness deteriorates
Solution Approach 1:
The sensor provides continuous feedback about container presence and liquid levels to the control system. This feedback mechanism enables monitoring of the dispensing process and detection of stale liquid conditions, ensuring reliability of liquid freshness while using a relatively simple sensor-control feedback loop.
Solution Approach 2:
The system replaces manual monitoring with an automated sensor-based detection system. The sensor electronically detects container presence and liquid status, substituting mechanical or manual observation with an automated sensing system that provides reliable monitoring without significant complexity increase.
4Manufacturing precision
If precise liquid level control is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The sensor provides feedback on liquid levels to the control system, which adjusts dispensing to achieve precise fill levels. This feedback-controlled regulation enables accurate liquid level control by continuously monitoring and adjusting the dispensing process based on sensor readings.
Solution Approach 2:
The control system regulates dispensing by changing operational parameters such as flow rate and dispensing duration based on sensor feedback. By dynamically adjusting these parameters, the system achieves precise liquid level control while managing complexity through parameter-based regulation rather than mechanical precision mechanisms.
Data Source
AI summary
A refrigerator includes a cabinet defining a fresh food compartment and a door pivotally mounted to the cabinet and including an interior surface in communication with the fresh food compartment when the door is closed. A liquid dispenser is arranged on the interior surface of the door, and a container is supported on the door and configured to receive liquid from the liquid dispenser. A sensor is configured to sense a property of the container, and a control is in communication with the sensor. The control is configured to regulate dispensing of liquid into the container based upon the sensed property of the container. In one example, the sensor is resiliently biased into contact with the container to sense a property of the container. In another example, the control indicates a stale liquid condition if a timer expires before the container has been removed from the door.