Design for Function and Marketability
ENG 5142(2 semesters Team 2)
Report of Task 2
DESIGN FOR FUNCTION AND MARKETABILITY
Product: Energy saving light bulbs
Members:
Ding ZheWei (Leader):11531492G
Leung Tsun Kin :12019613G
Li Yaxuan: 12127293G
Qiu Yi: 12126526G
2013
Table of contents
Chapter 1 Working Mechanism 3 1.1 Working Mechanism of Compact Fluorescent Lamp 3 1.2 Working mechanism of ballast 4 Chapter 2 Design of Compact Fluorescent Lamp Electronic Ballast 6 2.1 The function of electronic ballast 6 2.2 Circuit diagram 6 2.3 Some factors about influence of working frequency of ballast 7 2.4 Detail design of this project 8 2.4.1 Driver IC - Compact FAN7710 8 2.4.2 Selection of Resistance 9 Chapter 3 Light, Indicator & category of lamp 13 3.1 Introduction of light 13 3.2 Indicators about lamp: 14 3.3 The category of lamp and their characteristics 16 Chapter 4 Material of CFL 20 4.1 Glass 20 4.2 Fluorescent powder 23 4.3 Filling gas 28 Chapter 5 Safety and performance standard of CFLs 30 Chapter 6 Model (2D & 3D) for our products 35 Appendix 36 Appendix 1 36 Appendix 2 37 Reference: 38
Chapter 1 Working Mechanism
1.1 Working Mechanism of Compact Fluorescent Lamp
The conversion of electrical energy into radiant energy is relied on inelastic scattering of electrons inside the tube. Low pressure mercury vapor is injected into the tube. When the tube is connected to electricity, electrons emitted from the tube by the high temperature filament. The electrons moving in collide with the mercury atoms. Such collisions transfer kinetic energy in electrons to the mercury atoms. By absorbing this extra energy, the outermost shell electron in mercury atoms jump to a higher energy state, which is unstable to stay. A photon is emitted and this excited electron moves back to its original position. According to Planck’s law,
E = hc/λ Where E is the energy of the photon carries, h is Planck’s constant, c is the speed of light
Report of Task 2
DESIGN FOR FUNCTION AND MARKETABILITY
Product: Energy saving light bulbs
Members:
Ding ZheWei (Leader):11531492G
Leung Tsun Kin :12019613G
Li Yaxuan: 12127293G
Qiu Yi: 12126526G
2013
Table of contents
Chapter 1 Working Mechanism 3 1.1 Working Mechanism of Compact Fluorescent Lamp 3 1.2 Working mechanism of ballast 4 Chapter 2 Design of Compact Fluorescent Lamp Electronic Ballast 6 2.1 The function of electronic ballast 6 2.2 Circuit diagram 6 2.3 Some factors about influence of working frequency of ballast 7 2.4 Detail design of this project 8 2.4.1 Driver IC - Compact FAN7710 8 2.4.2 Selection of Resistance 9 Chapter 3 Light, Indicator & category of lamp 13 3.1 Introduction of light 13 3.2 Indicators about lamp: 14 3.3 The category of lamp and their characteristics 16 Chapter 4 Material of CFL 20 4.1 Glass 20 4.2 Fluorescent powder 23 4.3 Filling gas 28 Chapter 5 Safety and performance standard of CFLs 30 Chapter 6 Model (2D & 3D) for our products 35 Appendix 36 Appendix 1 36 Appendix 2 37 Reference: 38
Chapter 1 Working Mechanism
1.1 Working Mechanism of Compact Fluorescent Lamp
The conversion of electrical energy into radiant energy is relied on inelastic scattering of electrons inside the tube. Low pressure mercury vapor is injected into the tube. When the tube is connected to electricity, electrons emitted from the tube by the high temperature filament. The electrons moving in collide with the mercury atoms. Such collisions transfer kinetic energy in electrons to the mercury atoms. By absorbing this extra energy, the outermost shell electron in mercury atoms jump to a higher energy state, which is unstable to stay. A photon is emitted and this excited electron moves back to its original position. According to Planck’s law,
E = hc/λ Where E is the energy of the photon carries, h is Planck’s constant, c is the speed of light