Air conditioning comprising an electrostatic atomizing apparatus

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Solution Overview

Problem

Existing electrostatic atomizing apparatuses face issues with clogging, low reliability, high power consumption, and complex structures, particularly due to the use of ceramics and ultrasonic transducers, which lead to inefficiencies in mist generation and bacterial eradication in refrigerators and air conditioners.

Innovation Solution

The use of foam metal with large pore diameters and high voidage for the discharge electrode, along with a simplified water supply path and integrated cooling plate design, enables efficient nano-size mist generation and bacterial eradication without the need for a separate water reservoir or complex conveying systems.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If ceramic materials are used for the conveying part, then water can be conveyed through capillary action, but the small pore diameter (0.1 to 3 μm) causes clogging and reduces reliability

Engineering Contradiction:
Improvemist generation reliabilityVSAvoidconveying part structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent uses a porous metal plate instead of ceramic materials for the water conveying part. The porous metal plate has larger pore diameters compared to ceramic materials, which prevents clogging while maintaining capillary water conveyance capability. This improves reliability by eliminating the clogging issue associated with small-pore ceramic structures.

Inventive Principle:
Principle #31Porous materials

Solution Approach 2:

The patent changes the material parameter from ceramic to porous metal, which alters the pore diameter parameter from 0.1 to 3 μm to a larger value. This parameter change resolves the clogging problem while maintaining the capillary action mechanism for water conveyance.

Inventive Principle:
Principle #35Parameter changes

2Reliability

If ultrasonic transducers are used for mist generation, then mist can be generated, but power consumption increases and reliability decreases

Engineering Contradiction:
Improveoperation durationVSAvoidpower consumption
Core Design Contradiction:
ReliabilityVSUse of energy by moving object

Solution Approach 1:

The patent replaces the ultrasonic transducer (mechanical vibration-based mist generation) with an electrostatic atomizing apparatus. The electrostatic atomizing apparatus uses electric field forces to atomize water droplets, eliminating the need for mechanical ultrasonic vibration. This substitution reduces power consumption and increases operational reliability without requiring frequent maintenance.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If a separate water reservoir and conveying system are used, then water supply is ensured, but device complexity and cost increase

Engineering Contradiction:
Improvewater supply stabilityVSAvoidsystem structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the water reservoir function with the cooling plate by allowing the cooling plate to serve dual purposes: cooling air and providing water supply through condensation. The conveying part is integrated into this merged structure, eliminating the need for separate water reservoirs and complex conveying systems. This reduces device complexity and cost while maintaining reliable water supply through natural condensation and capillary action.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The cooling plate is designed to perform multiple functions: it cools the air passing through it and simultaneously serves as a water supply source through condensation. This multi-functional design eliminates the need for dedicated water storage and conveying components, simplifying the overall system structure.

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

4Reliability

If ceramic materials with electrical resistance are used, then electrical insulation is provided, but nano-size mist generation efficiency is reduced

Engineering Contradiction:
Improveelectrical insulationVSAvoidmist generation efficiency
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent uses a porous metal plate instead of ceramic materials. The porous metal plate provides both electrical insulation (when dry) and efficient water conveyance through its porous structure. The larger pore diameter improves water supply to the atomizing electrodes, enhancing nano-size mist generation efficiency while maintaining necessary electrical insulation properties.

Inventive Principle:
Principle #31Porous materials

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 solution results in a reliable, low-cost, and efficient electrostatic atomizing apparatus that can operate for extended periods with reduced power consumption, ensuring consistent mist generation and bacterial eradication within refrigerators and air conditioners.

Implementation Method 1

an electrostatic atomizing apparatus that generates nano-size mist

Methodology Applied
Scientific EffectElectrostatic discharge: Electrostatic Discharge

Implementation Method 2

a cooling panel that condenses moisture in air in the refrigerator

Methodology Applied
Scientific EffectCondensation: Condensation

Implementation Method 3

a conveying part for conveying water by capillary action

Methodology Applied
Scientific EffectCapillary action: Capillary Action

Data Source

PatentEP2642212B1Air conditioning comprising an electrostatic atomizing apparatus
Publication Date: 2019.11.13 MITSUBISHI ELECTRIC CORP
  • EP2642212B1 patent drawingFigure 1
  • EP2642212B1 patent drawingFigure 2
  • EP2642212B1 patent drawingFigure 3

AI summary

It is an object to provide an electrostatic atomizing apparatus (200) which is simply structured, is easy to assemble, is low in cost, has clogging resistance against foreign matter, can be used for a long time, and is highly reliable, or a home electrical appliance such as a refrigerator, air conditioner, etc. including the electrostatic atomizing apparatus (200). A discharge electrode (230) formed of foam metal, whereto water that attaches to a surface is supplied by capillary action, a counter electrode (240) provided so as to be opposed to the discharge electrode (230), and a water supply means that is provided directly above the discharge electrode (230) via a predetermined clearance, supplying water to the discharge electrode or the electrode holding part (220), are included.