Laundry Dryer Steam Generation Using Integrated Heating Apparatus

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Solution Overview

Problem

Current laundry drying machines lack the capability to efficiently heat water to produce high-temperature steam for enhanced cleaning, sterilization, and wrinkle elimination, and often require additional components that increase manufacturing costs and energy consumption.

Innovation Solution

Incorporating a liquid flow-through apparatus in close proximity to a heating apparatus within the air heating channel, where water is heated and evaporated into steam, with optional features like a hydrophilic coating and nozzle to enhance heat transfer and steam generation, allowing for direct steam delivery to the drying chamber.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a separate steam generator is added to the laundry drying machine, then steam generation capability is improved, but device complexity and manufacturing cost increase

Engineering Contradiction:
Improvesteam generation capabilityVSAvoiddevice complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines the steam generation function with the existing heating apparatus by positioning a liquid flow-through apparatus in close proximity to the heating element. Water flows through channels adjacent to the heating apparatus, absorbing heat directly and converting to steam, thereby integrating steam generation into the existing heating system without requiring a separate steam generator.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The heating apparatus serves dual functions: it heats air for the drying chamber and simultaneously generates steam by transferring heat to water flowing through the liquid flow-through apparatus. This multi-functionality eliminates the need for dedicated steam generation equipment.

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

2Adaptability or versatility

If a separate steam generator is added to the laundry drying machine, then steam generation capability is improved, but manufacturing cost increases

Engineering Contradiction:
Improvesteam generation capabilityVSAvoidmanufacturing cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The patent combines the steam generation function with the existing heating apparatus by positioning a liquid flow-through apparatus in close proximity to the heating element. Water flows through channels adjacent to the heating apparatus, absorbing heat directly and converting to steam, thereby integrating steam generation into the existing heating system without requiring a separate steam generator.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The heating apparatus serves dual functions: it heats air for the drying chamber and simultaneously generates steam by transferring heat to water flowing through the liquid flow-through apparatus. This multi-functionality eliminates the need for dedicated steam generation equipment.

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

3Productivity

If additional heating components are added for steam generation, then steam generation efficiency is improved, but energy consumption increases

Engineering Contradiction:
Improvesteam generation efficiencyVSAvoidenergy consumption
Core Design Contradiction:
ProductivityVSUse of energy by moving object

Solution Approach 1:

The patent combines the steam generation function with the existing heating apparatus by positioning a liquid flow-through apparatus in close proximity to the heating element. Water flows through channels adjacent to the heating apparatus, absorbing heat directly and converting to steam, thereby integrating steam generation into the existing heating system without requiring a separate steam generator.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The liquid flow-through apparatus enables continuous heat transfer from the heating apparatus to water, maintaining steady-state steam generation. The continuous flow of water ensures consistent heat absorption and steam production without interrupting the drying process, maximizing energy utilization efficiency.

Inventive Principle:
Principle #20Continuity of useful 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

Enables effective steam generation for improved cleaning, sterilization, and wrinkle removal while reducing energy consumption and manufacturing costs by utilizing existing heating components, and allows for controlled temperature adjustments for optimal laundry processing.

Implementation Method 1

water is heated and evaporated into steam

Methodology Applied
Scientific EffectEvaporation: Evaporation

Implementation Method 2

A fluid is heated by the heating apparatus after entering the liquid flow-through apparatus

Methodology Applied
Scientific EffectHeat transfer: Conduction (thermal)

Implementation Method 3

a hydrophilic coating and nozzle to enhance heat transfer and steam generation

Methodology Applied
Scientific EffectWetting: Wetting

Data Source

PatentEP3315657B1A laundry drying appliance
Publication Date: 2019.06.26 BSH HAUSGERATE GMBH
  • EP3315657B1 patent drawingFigure 1~3
  • EP3315657B1 patent drawingFigure 4~6

AI summary

A laundry drying machine is provided, including a drying chamber (2) and an air heating channel (3) in fluid communication with the drying chamber. A heating apparatus (5) is disposed in the air heating channel (3); a liquid flow-through apparatus (6; 61; 62; 63) is disposed close to or surrounding the heating apparatus, and an input channel (7) and an output channel (8) are connected to the liquid flow-through apparatus (6; 61; 62; 63). A fluid is heated by the heating apparatus (5) after entering the liquid flow-through apparatus (6; 61; 62; 63) from the input channel (7), and then flows out of the output channel (8), so that the heated liquid is obtained. When the liquid flow is relatively small, high-temperature steam after the liquid is evaporated may be obtained.