Par-Fried Root Vegetable Drying for Rapid Reconstitution
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Solution Overview
Problem
Current methods for producing par fried potato products are inefficient in reducing reconstitution time while maintaining quality, as they often lead to flavor degradation, color variation, and increased production costs due to extended frying times and additional equipment requirements.
Innovation Solution
A method involving blanching, pre-fry drying, par frying, and post-fry drying with controlled heat and humidity to achieve rapid reconstitution, reducing moisture content and preserving flavor and texture, with the post-fry drying step conducted at a temperature lower than par frying to prevent browning and flavor loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If par frying time is extended to reduce moisture content, then moisture removal is improved, but potato flavour degrades and color variation increases
Solution Approach 1:
The patent divides the moisture removal process into two distinct stages: par frying followed by freeze drying. This segmentation allows each process to perform its optimal function - par frying for initial moisture reduction and freeze drying for final moisture removal without excessive heat exposure, thereby resolving the contradiction between moisture removal and quality preservation
Solution Approach 2:
The patent utilizes phase transition (freezing and sublimation) in the freeze drying stage to remove moisture at lower temperatures. The product is frozen and then subjected to vacuum conditions where ice sublimates directly to vapor, enabling moisture removal without the thermal degradation that occurs during extended par frying
2Quantity of substance
If a two-step par fry method is used to reduce moisture content, then moisture removal efficiency is improved, but production line rate decreases and equipment complexity increases
Solution Approach 1:
The patent replaces the mechanical/thermal process of extended par frying with a freeze drying process that operates under different physical principles. This substitution enables efficient moisture removal without requiring prolonged thermal processing, thereby maintaining higher production line rates while achieving the desired moisture content reduction
3Object-generated harmful factors
If a fry-freeze-fry process is used to reduce moisture content, then negative effects of frying are reduced, but process complexity and oil usage increase
Solution Approach 1:
The patent extracts the moisture removal function from the frying process by introducing a separate freeze drying stage. This extraction allows the frying process to be limited to the essential par frying step without the need for additional frying steps, thereby reducing process complexity and oil usage while still achieving effective moisture removal and minimizing frying-related negative effects
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
This method enables rapid reconstitution of potato products in 90 seconds or less, maintaining flavor and texture quality, reducing energy consumption, and minimizing color mottling and variation, while also reducing acrylamide levels and oil usage.
Implementation Method 1
The post-fry dryer removes moisture from the par-fried potato products
Implementation Method 2
blanching the root vegetables
Data Source
AI summary
The invention relates to a method for producing vegetable products from blanched vegetables, comprising:par frying the blanched vegetables at a par frying temperature andnext applying heat and humidity for drying the vegetables.