Project Project ««Vacuum CleanerVacuum Cleaner»»
SUBMITTED TO THE SANYO Electric Co. Ltd.
PRESENTED BY Institute of Innovative Design
Terms:Beginning: January 01 2003Completion: March 31 2003
FINAL PRESENTATION
Institute of Innovative Design
IID
Vacuum cleaner SC-JT8DVacuum cleaner SC-JT8D
Object of Object of AAnalysisnalysisInstitute of Innovative Design
IID
To capture and to move dust To capture and to move dust by airflow.by airflow.
Main FunctionMain FunctionInstitute of Innovative Design
IID
Main Main GoalGoal
To develop the design of cleaning system that To develop the design of cleaning system that drastically reduce the distracting noise from 62 dB(A) drastically reduce the distracting noise from 62 dB(A) to 49 db(A) or less by using TRIZ technology.to 49 db(A) or less by using TRIZ technology.
Project GoalsProject GoalsInstitute of Innovative Design
IID
Forecasting - is not present any Forecasting - is not present any restrictions, down to replacement of the restrictions, down to replacement of the physical principle.physical principle.
Desirable level of results of the project - Desirable level of results of the project - a degree of allowable changes of object:a degree of allowable changes of object:
Level E.Level E.
RestrictionsRestrictionsInstitute of Innovative Design
IID
Supporting InformationGathering
Supporting information
Analysis of the ObjectFunctional and Flow models,
Evolution Trends, Key Disadvantages, Contradictions
Problem SolutionEngineering Solutions
Data GatheringBackground information
Function BasedInformation Gathering
Function orientedinformation
CONCEPTUAL STAGEINFORMATION STAGE
ANALYTICAL STAGE
Concept substantiationConcepts,
Ideas for Further Development
Problem StatementTrimming problems,
Feature transfer problems, Key problems
Innovative Technology of Innovative Technology of DesignDesign
Institute of Innovative Design
IID
IINFORMATIONNFORMATION SSTAGETAGE
Institute of Innovative Design
IID
Information replyInformation requestLegend:
Conceptual stage
Information stageInfo 2
Scientific (basic) information
Info 1 Source
information
Info 3 Functional information
Info 4 Support
information
Analytical stageKey problemsKey problems ConceptsConcepts
Processing InformationProcessing InformationInstitute of Innovative Design
IID
INFORMATION
Info 4SUPPORTING INFORMATION
Info 3FUNCTIONAL INFORMATION
Info 1INFORMATION
SOURCE
INFORMATION ON SPECIFIC CONCEPTS
SCIENTIFIC BASIS, CALCULATIONS
REFERENCES
LEADING AREAS OF ENGINEERING ENGINEERING DEVELOPMENTS AND THEIR COMPONENTS (EQUIPMENT, MATERIALS, ETC. I.E. DATA FOR FORMULATION OF FUNCTIONS) RESOURCES FOR STATED KEY PROBLEMS SOLVING
BASIC SCIENTIFIC PRINCIPLES OF OBJECT ACTION (PHYSICAL, CHEMICAL, GEOMETRICAL, BIOLOGICAL) OBJECT EVOLUTION PARAMETERS CHARACTE- RIZING THE OBJECT AND ITS COMPONENTS
INITIAL INFORMATION FROM CUSTOMER (DIAGRAMS, SAMPLES, ETC.)
DATA OF COMPETITORS PRODUCTION
SCIENTIFIC (BASIC)
INFORMATION
Info 2
Information SearchInformation Search Types of Information UsedTypes of Information Used
Institute of Innovative Design
IID
Table of Information SearchTable of Information Search FragmentFragment
Search direction
Leading fields of science and technology
Principle, method, device
Possible application to the project
1. Technical function: To create airflow Generalized technical function:
To move substance
1.1. Problem: High velocity of airflow forms turbulent motion. It is the cause of a noise.
1.1.1. Absorption sound by substance
FansCompressorsPumps
Mufflers To install muffler in body of vacuum cleaner. To make body double with soundproof material inside (or use vacuum).
2. Engineering function: To create airflow Generalized engineering function:
To move substance
2.1. Problem: Movers of gas generate discrete noise at the creation of movement of substance.
2.1.2. Extinguishing of sound by antisound
Electronic engineering System of active noise control (electronic circuit)
To apply active noise control system in order to reduce noise.
Acoustics Helmholtz’s resonator To apply Helmholtz’s resonators to extinguishing a sound with different frequencies.
Institute of Innovative Design
IID
Analytical StageAnalytical Stage
Institute of Innovative Design
IID
Analytical Stage StructureAnalytical Stage StructureInstitute of Innovative Design
IID
STATEMENT OF KEY PROBLEMS
GENETIC ANALYSIS
COMPONENT - STRUCTURAL
ANALYSIS
FUNCTIONAL - PARAMETRIC
ANALYSIS
PARAMETRIC ANALYSIS
DIAGNOSTIC ANALYSIS
INTEGRATION OF ALTERNATIVE SYSTEMS
-CAUSE-AND-EFFECT CHAINS ANALYSIS
Problems
Undesirable effects
Denotations:
STATEMENT OF PROBLEMS DIRECTION OF
SOLUTION OVERMODELING
Supersystem:
System:
Subsystem:
Ambient air Electric current
Vacuum cleaner
Dust
User
Tube Body Fan motorFloor brush Dust collector Power cord
Floor brush case
Brush
Intake air windows
Rollers
Joint connector
Turbo-brush
Bearings of turbo-brush
Sucking canal of the pipe
Handle
Joint
Sucking central hose
Exhaust outside hose
Control wire
Connector
Exhaust canal of the pipe
Control panel
Dust collector basket
Power cord reel
Absorption filters of exhaust air
Exhaust vents of the wheel
Filter of the motor protection
Control unit
Rotor blades
Fan stator
Stator of electric motor
Rotor of electric motor
Ball bearings
Collector
Rotor
Case of electric motor
Exhaust canal
Electric brush
Plug
Electric wire
Braid
Holder
Sack
Fan case
Surface (floor)
Component Structural Component Structural AnalysisAnalysis
Institute of Innovative Design
IID
Function AnalysisFunction AnalysisFragment of function tableFragment of function table
Institute of Innovative Design
IID
Element Function Rank
Turbo brush To move dust B
To generate discrete noise H
Sucking central hose To direct sucking airflow A1
To transmit aerodynamic noise H
To transmit discrete noise H
Body To direct exhaust airflow A3
To hold exhaust canal A4
To hold power cord reel A2
To direct sucking airflow A1
To transmit aerodynamic noise H
To transmit mechanical noise H
Dust collector To collect dust B
To decelerate sucking airflow H
Rotor blades To create discrete noise H
To create exhaust airflow A3
Only 4 elements provide performance of the main useful function (MUF):
Sucking airflow Brush Turbo-brush Dust collector
Conclusions to Conclusions to FunctionFunction AnalysisAnalysis
Institute of Innovative Design
IID
Auxiliary function - 50%
Harmful function - 48%
Basic function - 2%
Statistics: Amount of elements 39 Basic function 4 Useful function 104 Harmful function 94
Function Parametric Function Parametric AnalysisAnalysis
StatisticsStatistics
Institute of Innovative Design
IID
28%
Results of Trimming ProcessResults of Trimming Process
The solution of trimming problems will allow to reduce noise without change physical The solution of trimming problems will allow to reduce noise without change physical principle of working of vacuum cleaner.principle of working of vacuum cleaner.
Element for trimming Trimming problems
Exhaust airflow 1. How to cool elements of vacuum cleaner without exhaust airflow?
Rotor of electric motor 2. How to rotate a rotor without rotor of electric motor?
Rotor blades 3. How to move sucking airflow without rotor blades?
Collector 4. How to rotate a rotor of electric motor without collector?
Ball bearings 5. How to hold rotor of electric motor without ball bearings?
Institute of Innovative Design
IID
Cause-Cause-And-And-Effect Chains Effect Chains AnalysisAnalysis
Institute of Innovative Design
IID
Mechanical noise
Release of air into atmosphere
Friction of airflow about surfaces
NOISE
Inhomogeneity of airflow
Acceleration of airflow
Change of airflow direction inside elements of cleaner
Creation of turbulent airflow
Capture and transfer dust by air
Creation of pressure gradient
Existing operation principal of cleaner
Blades move air
Internal friction of airflow
Viscosityof air > 0
Rotor rotation
Rotation of electric motor rotor
Operation principle of electric motor
Rigid junction of vibration sources
with body
Transmission of vibration
by body
Interaction between electric motor rotor and stator
Creation of vibration
Ball bearings rotation
Deceleration of airflow
Blades rotation in the air
Turbo-brush rotationDiscrete noise
Aerodynamic noise
Suction of air from atmosphere
Institute of Innovative Design
IID Statement of key Statement of key problemsproblems
Key problem Concepts solving key problems
1. How to muffle noise in the dust airflow? 1
2. How to reduce a discrete component of noise? 2
3. How to provide rigid junction of fan-motor with body, which not transmit vibration from fan-motor?
3
4 How to hold rotor of electric motor without ball bearings? 4
5. How to rotate rotor of electric motor without collector? 6
6. How to move discrete noise into ultra sound region of spectrum? 5
7 . How to rotate rotor without rotor of electric motor? 6
8. How to move sucking airflow without rotor blades? 7,8
9. How to cool elements of vacuum cleaner without exhaust airflow? 9
10. How to eliminate suction of air from atmosphere and release of air into atmosphere?
9
11. How to extract from a carpet and to transfer dust by using electric field in weak airflow of low noise vacuum cleaner?
10
12. How to extract from a carpet, to transfer and collect a dust by using of electric field?
11
Institute of Innovative Design
IID
Classes of ProblemsClasses of Problems
KEY PROBLEMSKEY PROBLEMS
Direction 1NOISE MUFFLING
WITHOUT CHANGE OF CENTRIFUGAL FAN
_____________
3 PROBLEMS
CHANGE OF CENTRIFUGAL
FAN_____________
5 PROBLEMS
CHANGE OF DESIGN OF VACUUM
CLEANER_____________
4 PROBLEMS
Direction 2 Direction 3
Institute of Innovative Design
IID
Conceptual StageConceptual Stage
Institute of Innovative Design
IID
Conceptual direction 1 Conceptual direction 1 Institute of Innovative Design
IID
NOISE MUFFLING WITHOUT CHANGE OF CENTRIFUGAL FAN
The purpose of this direction: reduction of noise level without change of fan-motor.
In concepts of the given direction fan-motor does not change, reduction of noise level is achieved by design methods with the minimal changes in system.
Concept 1 (A). Suppression of Concept 1 (A). Suppression of noise by the active muffler noise by the active muffler ((ННelmgoltz’s resonator)elmgoltz’s resonator)
1. Sucking pipeline. 2. Handle. 3. Throat of Нelmgoltz’s resonator. 4. Нelmgoltz’s resonator. 5. System of fine tuning of Нelmgoltz’s resonator. 6. Neutralizing electrode. 7. High voltage source. 8. Control wires.
1
2 3 4 5
6 " - "
" + "
7
8
Institute of Innovative Design
IID
Concept 1 (B). Suppression of Concept 1 (B). Suppression of noise by the active muffler noise by the active muffler
((ННelmgoltz’s resonator)elmgoltz’s resonator)
1. Case of fan-motor. 2. Annular airline. 3. Resonators. 4. Fan-motor.
À
À À - À 1 2 3 4
Institute of Innovative Design
IID
Concept 2. Reduction of the Concept 2. Reduction of the discrete component of noise by discrete component of noise by rotary shield.rotary shield.
1. Fan-motor. 2. Rotor. 3. Blades. 4. Case 5. Axis. 6. Support washer. 7. Grid..
À
À 1
2
3 4
5 6
7
À - À
R O T A T E
Institute of Innovative Design
IID
Concept 3. Rigid fastening of Concept 3. Rigid fastening of fan-motor with body of vacuum fan-motor with body of vacuum cleaner does not transmitting cleaner does not transmitting vibration.vibration.
1. Fan-motor. 2. Electromagnet. 3. Internal holder of fastening. 4. External holder of fastening. 5. Elastic cushions. 6. Condensing corrugation.
e l e c t r i c c u r r e n t À
À
1
2
3 4 5 6 À - À
Institute of Innovative Design
IID
Conceptual direction 2Conceptual direction 2Institute of Innovative Design
IID
NOISE EXTINGUISHING WITH CHANGE EXTINGUISHING WITH CHANGE OFOF FANFAN MOTOR.MOTOR.
The purpose of this direction: reduction of noise level with change of fan-motor.
In concepts of this direction reduction of noise is associated with the change of fan-motor.
Concept 4. Bearings of rotor of Concept 4. Bearings of rotor of electromotor do not creating electromotor do not creating
vibration.vibration.
1. External ring of the thrust bearing. 2. Internal ring of the thrust bearing. 3. Constant magnet of the thrust bearing. 4. Constant magnets of the radial bearing. 5. Ring linings. 6. Shaft. 7. Magnetic liquid.
N S
S
N
N
S
S
N S
N
N
S
N S
S
N
1 2
3 4 5
6
7
Institute of Innovative Design
IID
Concept 5. Application of Concept 5. Application of ultrasonic siren increases ultrasonic siren increases sucking ability of the fan.sucking ability of the fan.
1. Rotor. 2. Admission stator. 3. Outlet stator. 4. Case.
1
2
3 4
À
À
R O T A T I O N
Institute of Innovative Design
IID
Concept 6. Rotor rotation of the Concept 6. Rotor rotation of the fan by stator of electromotor.fan by stator of electromotor.
1. Case. 2. Exhaust windows. 3. Pumping part of fan rotor. 4. Motor part of fan rotor. 5. Stator of fan. 6. Stator of electromotor. 7. Heat pipes. 8. Axis.
R O T A T I O N
À
À
A I R F L O W
À - À 1 2
3 4 5
6
7
8
Institute of Innovative Design
IID
Concept 7. Bladeless disk-Concept 7. Bladeless disk-shaped fan.shaped fan.
1. Case. 2. Disks. 3. Joining grid. 4. Stator of the fan. 5. Shaft of electromotor.1 2
3
4
5
A I R F L O W
R O T A T I O N
Institute of Innovative Design
IID
Concept 8. Ejection vacuum Concept 8. Ejection vacuum cleaner.cleaner.
1. Nozzle. 2. Dust collection room. 3. Ejector. 4. Gas-cylinder. 5. Compressor-motor. 6. Control unit.. 7. Air filter. 8. Airways of high pressure.
1
2 3
4 5
6 7 8
Institute of Innovative Design
IID
Conceptual direction 3Conceptual direction 3 Institute of Innovative Design
IID
CHANGE OF DESIGN OF VACUUM CLEANER
The purpose of the given direction: reduction of noise level associated with change of a design of vacuum cleaner.
In concepts of the given direction reduction of noise level is achieved by change of design of a vacuum cleaner.
It is offered to change design not changing principle of operation in order to reduce noise of vacuum cleaner. Vacuum cleaner operates without release of air in environmental atmosphere. Air circulates inside the system (a body of vacuum cleaner - an airway - a floor brush - an airway – the body).
Concept 9. Vacuum cleaner not Concept 9. Vacuum cleaner not sucking and not exhausting sucking and not exhausting
ambient air.ambient air. Institute of Innovative Design
IID
Concept 9 (A). Vacuum cleaner Concept 9 (A). Vacuum cleaner not sucking and not exhausting not sucking and not exhausting
air with active system of cooling.air with active system of cooling.
1. Body. 2. Radiator. 3. Thermomechanical converter. 4. Canal of air return. 5. Fan-motor. 6. Dust collector. 7. Power cord reel. 8. Feeding contour of airway. 9. Sucking contour of airway. 10. Floor brush.
12
3
4
68910
HEAT
5 7
Institute of Innovative Design
IID
Concept 9 (B). Vacuum cleaner Concept 9 (B). Vacuum cleaner not sucking and not exhausting not sucking and not exhausting
air with active system of cooling.air with active system of cooling.
1. Body. 2. Peltier elements. 3. Cooling fan. 4. Canal of air return. 5. Fan-motor. 6. Dust collector. 7. Temperature transmitter. 8. Control circuit. 9. Power cord reel. 10. Feeding contour of airway. 11. Sucking contour of airway. 12. Floor brush.
12
3
4
6101112
HEAT
5 9
7
8
Institute of Innovative Design
IID
Elimination of potential Elimination of potential problemsproblems..
1. Sucking pipeline. 2. Corona-forming electrode. 3. Electroconductive dust collector. 4. High voltage sourse.
1 2 3
4 A I R F L O W + D U S T
D U S T
" - " E L E C T R I C C U R R E N T A I R F L O W
Institute of Innovative Design
IID
Anew appeared resourceAnew appeared resource..
1. Case. 2. Flexible connector. 3. External sealing cuffs. 4. Internal sealing cuffs. 5. Windows of air return. 6. Sucking air window.
1
5 6
3 4
À À
À - À 2
Institute of Innovative Design
IID
Concept 10Concept 10.. Electrostatic vacuum Electrostatic vacuum cleaner.cleaner.
1. Body of a vacuum cleaner. 2. Airway. 3. Wire of the high voltage. 4. The case of floor brush. 5. Corona-forming electrode. 6. Sucking cavity.
3
A I R F L O W + D U S T
C L E A R E D S U R F A C E + D U S T
A I R F L O W
2 1
4 5 6
Institute of Innovative Design
IID
Concept 11. Electrostatic Concept 11. Electrostatic cleaner.cleaner.
1. The case. 2. Rollers. 3. Brush neutralizer. 4. An axis. 5. A source of a high voltage. 6. Corona-forming electrode. 7. Unipolar electret collector of dust.
G R O U N D
H I G H V O L T A G E E L E C T R I C C U R R E N T
À
À
À - À
1 2
3 4
5
6 7
C L E A R E D S U R F A C E + D U S T
Institute of Innovative Design
IID
Ranking of conceptsRanking of concepts
Institute of Innovative Design
IID
Results of ranking of conceptsResults of ranking of concepts
5 5 5 5 5
9
3 3
15
34
40
0
5
10
15
20
25
30
35
40
Rank
1 2 3 4 5 6 7 8 9 10 11
Concepts
Institute of Innovative Design
IID
CONCLUSIONSCONCLUSIONS
1. The three conceptual directions are detected and eleven 1. The three conceptual directions are detected and eleven concepts of perfecting of vacuum cleaner designed as a result concepts of perfecting of vacuum cleaner designed as a result of working on project. Concepts allow to reduce noise at of working on project. Concepts allow to reduce noise at operation of a vacuum cleaner according to requirements of operation of a vacuum cleaner according to requirements of the Customer.the Customer.
2. Ranking of designed concepts and multicriteria quantitative 2. Ranking of designed concepts and multicriteria quantitative estimation of their efficiency is made.estimation of their efficiency is made.
3. The most perspective direction is Conceptual direction 3: 3. The most perspective direction is Conceptual direction 3: Change of design of vacuum cleaner. This direction ensures Change of design of vacuum cleaner. This direction ensures maximal effect according to the purpose of the project.maximal effect according to the purpose of the project.
4. The most perspective concept with maximal effect on the 4. The most perspective concept with maximal effect on the purpose of the project is Concept 11 Electrostatic cleaner.purpose of the project is Concept 11 Electrostatic cleaner.
Institute of Innovative Design
IID