Induction Air Heater for Front Load Washing Machine Drying Efficiency

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Solution Overview

Problem

Existing front load washing machines are inefficient in drying time and energy usage, particularly for certain load sizes and materials.

Innovation Solution

Incorporation of an induction heater with an induction coil and heat transfer element within the air flow path, which heats air before it enters the drum, enhancing drying efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If ambient air is used for drying laundry in a front load washing machine, then the device complexity is low, but the drying efficiency and energy consumption are poor

Engineering Contradiction:

Improvedrying efficiencyVSAvoiddevice complexity

Core Design Contradiction:

ProductivityVSDevice complexity

Solution Approach 1:

The induction heater pre-heats the air before it enters the drum to perform drying. By heating the air in advance (preliminary action), the drying efficiency is significantly improved as the pre-heated air can more effectively evaporate moisture from laundry items.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent replaces conventional heating elements with an induction heating system. The induction heater uses electromagnetic fields to directly heat the air through an induction coil and heat transfer element, substituting traditional thermal conduction heating methods and achieving faster, more efficient heating.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Productivity

If heated air is used to dry laundry, then the drying efficiency is improved, but the energy consumption increases

Engineering Contradiction:

Improvedrying efficiencyVSAvoidenergy consumption

Core Design Contradiction:

ProductivityVSUse of energy by moving object

Solution Approach 1:

The induction heating system replaces conventional resistance heating elements. Induction heating transfers energy more efficiently by directly coupling electromagnetic fields to the heat transfer element, reducing energy losses and improving overall energy efficiency while maintaining high drying efficiency.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The system changes the temperature parameter of the air by using an induction heater to heat air to optimal drying temperatures. By controlling the heating parameters and using heat transfer elements, the system achieves efficient drying while managing energy consumption through optimized thermal parameters.

Inventive Principle:

Principle #35Parameter changes

3Loss of time

If the drying process is accelerated, then the drying time is reduced, but the energy usage increases

Engineering Contradiction:

Improvedrying timeVSAvoidenergy usage

Core Design Contradiction:

Loss of timeVSUse of energy by stationary object

Solution Approach 1:

The induction heater pre-heats air before it contacts the laundry, accelerating the drying process. This preliminary heating action reduces the time required for moisture evaporation, thereby reducing drying time while managing energy usage through efficient heat transfer.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The induction heating system enables faster heating rates compared to conventional heaters, allowing the drying process to be accelerated. The electromagnetic induction mechanism provides rapid heat generation, reducing drying time while maintaining reasonable energy consumption through efficient energy conversion.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Improves drying efficiency and reduces energy consumption by using heated air to dry laundry more effectively.

Implementation Method 1

an induction heater comprising an induction coil and a heat transfer element

Methodology Applied

Scientific EffectElectromagnetic induction: Electromagnetic Induction

Implementation Method 2

an induction heater comprising an induction coil and a heat transfer element, the induction heater located within the inlet flow path such that a flow of inlet air in the inlet flow path passes over the heat transfer element

Methodology Applied

Scientific EffectEddy currents: Eddy Currents

Implementation Method 3

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Data Source

PatentUS12522973B2Air heater for front load washing machine

Publication Date: 2026.01.13 HAIER US APPLIANCE SOLUTIONS INC

AI summary

Disclosed is a front load laundry appliance comprises a cabinet having a cabinet inlet vent, a drum positioned within the cabinet and accessible through the opening, and a cabinet duct fluidly coupling the cabinet inlet vent to the drum. The appliance defines an inlet flow path through a door duct, the cabinet inlet vent, and the drum. An induction heater comprising an induction coil and a heat transfer element is located within the inlet flow path such that a flow of inlet air in the inlet flow path passes over the heat transfer element.