Oscillating Ice Tray Cooling for Clear Ice Formation

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Solution Overview

Problem

Existing ice makers produce cloudy ice due to trapped air, which affects the taste and appearance of ice cubes, and require costly processing techniques to produce clear ice.

Innovation Solution

An ice maker with a thermoelectric device and oscillating ice tray that uses a combination of cold and warm air flows to expel air bubbles from water during the freezing process, forming clear ice without the need for a drain.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If conventional freezing methods are used, then ice cubes are formed, but trapped air makes the ice cloudy in appearance

Engineering Contradiction:
Improveice clarityVSAvoidtrapped air
Core Design Contradiction:
Manufacturing precisionVSObject-generated harmful factors

Solution Approach 1:

The ice tray is oscillated mechanically during the freezing process to agitate the water and allow trapped air bubbles to escape. This vibration prevents air entrapment that would otherwise cause cloudy ice, thereby improving ice clarity without requiring complex processing techniques.

Inventive Principle:
Principle #18Mechanical vibration

Solution Approach 2:

The system transitions from a static freezing process to a dynamic one by continuously oscillating the ice tray during freezing. This dynamic approach allows air bubbles to be expelled from the water as it freezes, resulting in clear ice while maintaining a relatively simple device structure.

Inventive Principle:
Principle #15Dynamics

2Manufacturing precision

If processing techniques are used to produce clear ice, then ice clarity is improved, but the cost increases

Engineering Contradiction:
Improveice clarityVSAvoidcost
Core Design Contradiction:
Manufacturing precisionVSEase of manufacture

Solution Approach 1:

The invention uses a simple oscillating mechanism with basic components (motor, ice tray) that can be manufactured at low cost. Rather than employing expensive industrial processing techniques, the system uses a straightforward mechanical oscillation approach that is economically viable for consumer appliances.

Inventive Principle:
Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The oscillating mechanism enables the ice-making process to self-regulate air bubble expulsion without requiring external intervention or complex processing equipment. The system performs the air removal function automatically through simple mechanical motion, reducing the need for costly additional processing steps.

Inventive Principle:
Principle #25Self-service

3Manufacturing precision

If the ice tray is oscillated during freezing, then air bubbles are expelled, but the device complexity increases

Engineering Contradiction:
Improveice clarityVSAvoiddevice structure
Core Design Contradiction:
Manufacturing precisionVSDevice complexity

Solution Approach 1:

The oscillating mechanism serves multiple functions: it agitates the water to expel air bubbles, promotes uniform freezing, and facilitates easy ice removal. By combining these functions into a single mechanical oscillation system, the invention achieves clear ice production without proportionally increasing device complexity.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention combines the freezing function and air bubble expulsion function into a single integrated process through mechanical oscillation. Rather than adding separate complex systems for each function, the oscillation mechanism simultaneously achieves both objectives, thereby limiting the increase in device complexity.

Inventive Principle:
Principle #5Merging (Combining)

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 solution effectively produces clear ice by allowing air bubbles to escape, improving the taste and appearance of ice cubes and eliminating the need for expensive processing techniques.

Implementation Method 1

A cold side of the thermoelectric device is thermally coupled with a bottom surface of the ice tray to freeze water retained therein. A hot side of the thermoelectric device opposes the cold side.

Methodology Applied
Scientific EffectThermoelectric effect: Peltier Effect

Implementation Method 2

A heat sink is thermally coupled with the hot side of the thermoelectric device and extends within the second air chamber.

Methodology Applied
Scientific EffectThermal convection: Convection

Implementation Method 3

A heat sink is thermally coupled with the hot side of the thermoelectric device and extends within the second air chamber.

Methodology Applied
Scientific EffectThermal radiation: Thermal Radiation

Implementation Method 4

An intake duct member is coupled with the housing proximate the second air chamber, and the intake duct member is configured to dispense a cold air flow over the heat sink.

Methodology Applied
Scientific EffectForced convection: Forced Convection

Implementation Method 5

A cold side of the thermoelectric device is thermally coupled with a bottom surface of the ice tray to freeze water retained therein.

Methodology Applied
Scientific EffectThermal conduction: Conduction (thermal)

Data Source

PatentUS9581363B2Cooling system for ice maker
Publication Date: 2017.02.28 WHIRLPOOL CORP
  • US9581363B2 patent drawing
  • US9581363B2 patent drawing
  • US9581363B2 patent drawing

AI summary

An ice maker having an ice tray horizontally suspended within a housing and a drive body rotatably coupled to a transverse axis of the ice tray and configured to oscillate the ice tray about the transverse axis. The cold side of a thermoelectric device is thermally coupled with a bottom surface of the ice tray, and a hot side opposes the cold side. A barrier extends around the periphery of the ice tray within the housing, and separates the housing into a first chamber and a second air chamber. A heat sink is thermally coupled with the hot side of the thermoelectric device and extends into the second air chamber. An intake duct member is coupled with the housing proximate the second air chamber, and is configured to dispense a cold air flow over the heat sink. The barrier restricts the cold air flow from entering the first chamber.