Grain Bin Headspace-Air Mixing for Moisture Control

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Solution Overview

Problem

Existing grain bin conditioning systems have limited operational time windows for conditioning agricultural products due to narrow temperature and humidity requirements, leading to potential over-drying or over-wetting, especially near the grain bin plenum, and are inefficient in utilizing ambient air effectively.

Innovation Solution

An air conditioning system that mixes high relative humidity headspace air from the grain bin with low relative humidity ambient air to achieve a target relative humidity level, controlled by a mixer and valves, and adjusts airflow rates to optimize moisture content regulation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If heated or unheated ambient air is introduced into grain bins for drying, then moisture content reduction is achieved, but operational time window is limited and over-drying risk increases

Engineering Contradiction:

Improvemoisture content controlVSAvoidoperational time window

Core Design Contradiction:

Manufacturing precisionVSDuration of action of moving object

Solution Approach 1:

The system merges headspace air (high RH) with ambient air (low RH) in a mixer to create optimized conditioning air. This combination extends the operational time window by utilizing the high RH headspace air to prevent over-drying while maintaining effective moisture content control through the balanced air mixture.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The system changes the relative humidity parameter of the conditioning air by mixing headspace air with ambient air. This parameter adjustment allows the system to operate beyond the traditional narrow time window, maintaining optimal moisture content control while extending operational duration.

Inventive Principle:

Principle #35Parameter changes

2Use of energy by stationary object

If ambient air is used for conditioning agricultural products, then energy consumption is reduced, but moisture content regulation precision deteriorates

Engineering Contradiction:

Improveenergy consumptionVSAvoidmoisture content regulation

Core Design Contradiction:

Use of energy by stationary objectVSManufacturing precision

Solution Approach 1:

The system combines headspace air and ambient air in a mixer to create an optimized air mixture for conditioning. This merging approach maintains energy efficiency by using ambient air while improving moisture content regulation precision through the balanced composition of the air mixture.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The mixer acts as an intermediary device that blends headspace air and ambient air to produce conditioned air with optimal moisture content. This intermediary mechanism enables precise moisture content regulation without requiring additional energy-intensive heating or cooling systems.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Productivity

If air flow rate is increased to improve conditioning efficiency, then productivity increases, but risk of over-drying near plenum increases

Engineering Contradiction:

Improveconditioning efficiencyVSAvoidover-drying risk

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The system applies different air flow characteristics to different regions of the grain bin. By mixing high RH headspace air with low RH ambient air, the conditioned air has optimized moisture content that prevents over-drying near the plenum while maintaining efficient conditioning throughout the grain mass.

Inventive Principle:

Principle #3Local quality

Solution Approach 2:

The system changes the moisture content parameter of the conditioning air through mixing, which allows increased air flow rates without causing over-drying. The optimized air mixture maintains appropriate humidity levels even at higher flow rates, protecting against over-drying while improving productivity.

Inventive Principle:

Principle #35Parameter changes

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

Extends the operational time for effective conditioning, reduces the risk of over-drying or over-wetting, and improves moisture content control by using a controlled air mixture to condition agricultural products efficiently.

Implementation Method 1

mixes the high RH headspace air with low RH ambient air to get optimum RH for conditioning

Methodology Applied

Scientific EffectDiffusion: Diffusion

Implementation Method 2

The air mixture having the target relative humidity level is provided to a grain bin plenum to permeate through the agricultural product to regulate the agricultural product's moisture content

Methodology Applied

Scientific EffectPermeation: Permeation

Data Source

PatentUS20260068823A1Grain bin conditioning system using headspace air

Publication Date: 2026.03.12 AGI SURETRACK LLC

AI summary

An air conditioning system and methods of use regulate a moisture content of an agricultural product in a grain bin. The system receives headspace air from the headspace of the grain bin, which generally has a higher moisture content than ambient air. The system further receives ambient air and mixes the headspace air and the ambient air into a ratio comprising a target moisture content. The air mixture is provided into a grain bin plenum, where it then permeates through to agricultural product, thereby regulating the moisture. The system and method can be used to bring the agricultural product to a target moisture content that is preferred when storing the agricultural product.