Fluid-Push/Pull Defrosting System for Rapid Commercial Food Thawing

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Solution Overview

Problem

Existing pot and pan washing machines are not designed for defrosting items, and while improvements have been made for washing, they do not effectively address the need for rapid and safe defrosting of frozen food in commercial settings.

Innovation Solution

A defrosting system utilizing a fluid-push/pull system that directs a flow of fluid through a cavity containing frozen items, ensuring the fluid circulates around all surfaces, with a pumping system that can operate in both forward and reverse directions to enhance defrosting efficiency and conserve fluid, and includes features like temperature control and sensors for optimal defrosting.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If a fluid-push/pull system is used to circulate fluid around frozen items, then defrosting speed and efficiency are improved, but device complexity increases

Engineering Contradiction:
Improvedefrosting speedVSAvoidsystem complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The washing machine system is adapted to perform both washing and defrosting functions using the same fluid circulation infrastructure. The pump, fluid distribution system, and tank are used for both washing wares and defrosting frozen items, eliminating the need for a separate defrosting system and reducing overall device complexity.

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

Solution Approach 2:

The system dynamically adjusts fluid flow characteristics for defrosting operations. The pump variable speed control and adjustable fluid distribution patterns allow the system to optimize circulation for defrosting frozen items while maintaining the same hardware infrastructure, enabling rapid defrosting without permanent structural modifications.

Inventive Principle:
Principle #15Dynamics

2Productivity

If fluid circulation is directed through all surfaces of frozen items, then heat transfer efficiency is improved, but energy consumption increases

Engineering Contradiction:
Improveheat transfer efficiencyVSAvoidenergy consumption
Core Design Contradiction:
ProductivityVSUse of energy by moving object

Solution Approach 1:

The system employs periodic fluid circulation patterns during defrosting operations. The pump operates in cycles with variable speeds, creating periodic fluid flow that systematically directs water through different surfaces of frozen items over time. This periodic action ensures comprehensive heat transfer to all surfaces while allowing energy-efficient rest periods between circulation cycles.

Inventive Principle:
Principle #19Periodic action

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 safe and rapid defrosting of frozen items, minimizing operator time and fluid usage while ensuring all surfaces are exposed to convective heat transfer, thus improving defrosting efficiency and safety in commercial kitchens.

Implementation Method 1

exposes generally all surfaces of frozen items to convective heat transfer from fluid streams

Methodology Applied
Scientific EffectConvection: Convection

Implementation Method 2

utilizing a fluid-push/pull system and/or continuous motion fluid system

Methodology Applied
Scientific EffectForced Convection: Forced Convection

Implementation Method 3

The combination of deflections of the jet stream from the bottom, front and rear walls provides a rolling washing action within the wash tank

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Data Source

PatentUS9723864B2Defrost apparatus and method thereof
Publication Date: 2017.08.08 ELECTROLUX PROFESSIONAL INC
  • US9723864B2 patent drawing
  • US9723864B2 patent drawing
  • US9723864B2 patent drawing

AI summary

An apparatus and a method of defrosting frozen items, is provided. The apparatus and method utilizes a fluid flow system and method, such as a fluid-push/pull system in which generally an entire volume of fluid is pushed or pulled through a cavity in which frozen items are located and/or a continuous motion system in which fluid is circulated within a fluid tank of the system.